U.S. patent application number 14/494232 was filed with the patent office on 2015-03-26 for bonded fluid heat exchanging apparatus.
The applicant listed for this patent is PHILTECH INC.. Invention is credited to Yuji FURUMURA, Naomi MURA, Shinji NISHIHARA, Noriyoshi SHIMIZU.
Application Number | 20150083381 14/494232 |
Document ID | / |
Family ID | 52689929 |
Filed Date | 2015-03-26 |
United States Patent
Application |
20150083381 |
Kind Code |
A1 |
FURUMURA; Yuji ; et
al. |
March 26, 2015 |
BONDED FLUID HEAT EXCHANGING APPARATUS
Abstract
A heat exchanging apparatus has a flow path with air tightness
formed by joining a second sheet to a first sheet formed by bending
the first sheet by stamping and fluid introduced into the flow path
impinges on a wall of the flow path to perform heat exchange. A
material constituting the flow path may be a metal sheet or an
electrically-conductive plastic, and a small-sized and light-weight
heat exchanging apparatus can be manufactured at a low cost.
Inventors: |
FURUMURA; Yuji; (Kanagawa,
JP) ; MURA; Naomi; (Tokyo, JP) ; NISHIHARA;
Shinji; (Tokyo, JP) ; SHIMIZU; Noriyoshi;
(Tokyo, JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
PHILTECH INC. |
Tokyo |
|
JP |
|
|
Family ID: |
52689929 |
Appl. No.: |
14/494232 |
Filed: |
September 23, 2014 |
Current U.S.
Class: |
165/170 |
Current CPC
Class: |
F28F 21/083 20130101;
F28D 7/106 20130101; F28F 19/02 20130101; F28F 2255/08 20130101;
F28F 3/12 20130101; F28F 13/18 20130101; F28F 21/089 20130101; F28D
9/0031 20130101; F28F 2275/06 20130101 |
Class at
Publication: |
165/170 |
International
Class: |
F28F 3/12 20060101
F28F003/12 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 24, 2013 |
JP |
2013-197594 |
Claims
1. A heat exchanging apparatus, comprising: a first sheet formed
with grooves by bending the first sheet by stamping; and a second
sheet joined to the first sheet, wherein the grooves are provided
with lateral grooves opened outward at a side face of the first
sheet and elongated in one direction, and formed in another
direction different from the one direction at predetermined
intervals in a plural-stage fashion, and a plurality of
longitudinal grooves connecting adjacent lateral grooves of the
lateral grooves to each other such that the adjacent lateral
grooves communicate with each other, the longitudinal grooves being
perpendicular to the lateral grooves; a flow path is formed such
that fluid introduced into one lateral groove of the lateral
grooves positioned at on one end of the flow path flows to another
lateral groove of the lateral grooves positioned at the other end
of the flow path via the lateral grooves and the longitudinal
grooves; and fluid caused to flow in the flow path impinges on a
wall of the flow path perpendicularly to perform heat exchange and
the fluid is caused to flow out of a fluid outlet port positioned
at the other end of the flow path.
2. The heat exchanging apparatus according to claim 1, wherein the
sheets are each either one of an iron sheet, a stainless steel
sheet, an aluminum sheet, a brass sheet, and a plastic composite
material sheet mixed with carbon nanotubes, graphene, carbon
fibers, or metal fibers.
3. The heat exchanging apparatus according to claim 1, wherein
either one of lining with resin, paining, plating, oxidizing to
form an oxide film is performed to surfaces of the sheets.
4. The heat exchanging apparatus according to claim 1, wherein the
second sheet is joined to the first sheet by a joint of a type
formed by either one of joining using an electrical welder, joining
performed by electrical welding, joining performed by argon
welding, joining performed by silver solder welding, crimping,
joining performed by screwing, joining performed by screwing via
interposition between the sheets, and joining performed by
adhesive.
5. The heat exchanging apparatus according to claim 1, wherein the
fluid is either one of gas containing air, liquid containing water,
and gas containing radioactive element.
6. The heat exchanging apparatus according to claim 1, wherein the
heat exchanging apparatus heats the fluid by either one of
attaching a heater to the heat exchanging apparatus and putting the
heat exchanging apparatus in a high-temperature medium.
7. The heat exchanging apparatus according to claim 1, wherein the
heat exchanging apparatus cools the fluid by either one of causing
the heat exchanging apparatus to contact with a low-temperature
medium and putting the heat exchanging apparatus in a
low-temperature medium.
8. A heat exchanging apparatus, wherein two heat exchanging
apparatuses according to claim 1 are joined to each other and first
fluid and second fluid are caused to flow in each of the two heat
exchanging apparatuses.
9. An apparatus where high-temperature steam produced by the heat
exchanging apparatus according to claim 1 and an organic matter are
caused to contact with each other.
10. The heat exchanging apparatus according to claim 1, being a
bonded tubular heat exchanging apparatus formed in a tubular shape
and positioning a tubular sealing sheet inside, and including a
plurality of flow path sheets separated from one another and formed
on the tubular sealing sheet.
11. The heat exchanging apparatus according to claim 1, being a
cylindrical heat exchanging apparatus having a cylindrical flow
path sheet bonded to a cylindrical sealing sheet.
Description
BACKGROUND ART
[0001] The present invention relates to a heat exchanging apparatus
for heating or cooling fluid instantaneously.
[0002] As a heat exchanging apparatus, for example, there is an
apparatus for heating gas. A mechanism generally frequently used is
a mechanism for heating gas by causing the gas to pass through a
heated pipe. Alternatively, there is a mechanism for heating gas by
causing heated fluid to a pipe with fins and causing the gas to
pass through between the fins.
[0003] These mechanisms are frequently used not only for gas but
also to heat liquid or produce steam of water. An apparatus for
cooling gas opposite to heating gas also has a similar
mechanism.
[0004] This structure is popular and has a history, but an
apparatus having the structure requires a large volume. The reason
is because efficiency of heat exchange between fluid flowing in a
pipe and the pipe is poor.
[0005] A mechanism having a popular structure for improving the
heat exchange efficiency of the popular structure has been
proposed. Examples of the mechanism are shown in FIG. 1 and FIG.
2.
[0006] FIG. 1 shows a diagram of one example where a heating
mechanism so-called "impinging jet" has been realized, which is
shown in Re-publication of PCT International Publication No.
WO2006/030526. Gas which has passed through a pipe to impinge on a
heated hollow disc to perform heat exchange with the disc. A lamp
heater for heating is not shown.
[0007] FIG. 2 is a diagram of an apparatus where a flow path for
performing heat exchange efficiently by impinging of gas on a base
body is arranged on a surface of the base body to generate heating
gas, which is shown in Japanese Patent Application No. 2008-162332.
A conventional example having an efficient heat exchanging
structure shown in FIG. 2 is utilized in the present invention.
[0008] The heat exchange shown in FIG. 2 will be described. In FIG.
2, a structure of a flow path for gas is shown. The flow path is
formed by cutting the surface of the base body made of carbon. Many
longitudinal groove narrow flow paths increasing a flow rate of gas
are formed by cutting. Gas which has passed through the narrow flow
paths impinges lateral-groove flow paths communicating with the
longitudinal groove flow paths at a right angle at a high speed to
perform heat exchange with the high-temperature carbon at a high
efficiency. This heat exchange occurs on the carbon surface
repeatedly by the number of impinging, so that gas is heated to a
temperature substantially equal to the temperature of the
carbon.
[0009] Since a velocity of gas with a flow rate of 100 SLM passing
through a section of 1 cm.sup.2 is calculated to be 16 m/s, a time
period required for the gas to pass through an apparatus with the
flow path section of having a length of 10 cm is 0.01 seconds or
less. That is, gas is heated up to the temperature of the heated
carbon instantaneously. The structure provided by FIG. 2 makes
instantaneous heat exchange possible.
[0010] The apparatuses for heating gas instantaneously to jet
high-temperature gas are applied to not only heating and drying but
also a step of heating various materials (metal, dielectric and the
like) applied to a substrate to bake them. These apparatuses are
also effective for heating such liquid as water.
[0011] The apparatus for cooling gas instantaneously is applied to
cooling steam from a turbine, cooling refrigerant for an air
conditioner, cooling exhaust gas from a boiler, and the like. The
application to cooling refrigerant is promising in geothermal power
generation paid attention to recently.
SUMMARY OF THE INVENTION
[0012] The present invention relates to an apparatus for performing
heating of fluid such as gas or liquid instantaneously or cooling
of the same instantaneously efficiently.
[0013] It is desired to manufacture an apparatus for heating or
cooling gas at a high efficiency at a low cost. That is, it is
desired to manufacture an apparatus having the flow path structure
shown in FIG. 2. The structure shown in FIG. 2 is made by cutting a
surface of a base body material. When cutting is easy, a cutting
cost is not expensive. However, when the base body is made of such
hard material as metal, it takes time to work a groove having a
width of 1 mm, 2 mm or 3 mm and a depth of 2 mm, 3 mm or 5 mm
deeply by using an end mill and it is not easy. This cutting work
obstructs reduction of a manufacturing cost.
[0014] If the working for formation of the flow path shown in FIG.
2 is made easy, the manufacturing cost can be reduced. If the
manufacturing cost is reduced, an industry for application of a
heat exchanging apparatus is expanded.
[0015] A basic structure of the present invention to solve the
problem is shown in FIG. 3.
[0016] In manufacture of the structure shown in FIG. 3, grooves
through which gas for performing heat exchange passes are
manufactured by cutting a surface of the base body. A closed flow
path having air tightness is formed by pressing a sheet member on
to the base body formed with the grooves.
[0017] A structure shown in FIG. 3 is obtained by using a die to
form grooves by stamping and utilizing the grooves as flow paths
for fluid. The structure in FIG. 3 is a structure obtained by
bonding a flow path sheet 301 manufactured with a groove structure
defining flow paths and a sealing sheet 302 for closing the flow
paths in an air-tight manner. The grooves are composed of lateral
grooves opened outward on a lateral face of the flow path sheet 301
and elongated in one direction, the lateral grooves being formed in
another direction at predetermined intervals in a plural stage
fashion, where lateral grooves adjacent to each other are caused to
communicate with each other via a plurality of longitudinal grooves
perpendicular to the lateral grooves. A flow path is formed such
that fluid introduced into a lateral groove positioned on one end
of the flow path flows to a lateral groove positioned on the other
end of the flow path via a lateral groove and a longitudinal
groove, and fluid introduced into the flow path impinges on a wall
of the flow path perpendicularly to perform heat exchange and it is
caused to flow out of a fluid outlet port at the other end of the
flow path. Since the flow path sheet 301 which has been
manufactured with the flow path structure can be manufactured by a
die stamping, repetitive manufacture can be performed simply. As
the sheets, selection can be made variously from an iron sheet, a
plated steel sheet, a stainless steel sheet, an aluminum sheet, a
brass sheet, and the like. When the flow path sheet and the sealing
sheet are made of metal, joining between these two sheets can be
performed by adhesion using electric welder (a tool for causing
large current to flow to contact faces to join both the contact
faces), electric welding, argon welding, silver solder welding,
crimping performed for a canned food.
[0018] A fluid inlet 303 and a fluid outlet 304 have been formed in
the flow path sheet 301 in this example, but they may be formed in
the sealing sheet 302.
[0019] A narrow groove constituting the flow path is called
"channel (indicated by a symbol CH). The width of the channel has a
width of 2 mm, a depth of 2 mm and a length of 6 mm, for example.
The shapes of channels CH1, CH2, CH3, CH4, CH5 and CH6 can be
designed arbitrarily. The numbers of the channels can be designed
arbitrarily. The lateral groove extending perpendicularly to the
plurality of channels to connect them is called "tab (indicated by
a symbol T"). Fluid which has passed through a channel impinges on
a wall of a tab. A width of the tab is 5 mm, a depth thereof is 5
mm and a length thereof is 5 cm, for example. The shapes and the
numbers of tabs T1, T2, T3, T4, and T5 can be designed
arbitrarily.
[0020] A lateral groove connecting to the fluid inlet 303 is called
"buffer tab 305", and a lateral groove connecting to the fluid
outlet 304 is called "buffer tab 306". A width of the buffer tab is
15 mm, a depth thereof is 5 mm and a length thereof is 5 cm, for
example. The shapes of these buffer tabs can be designed
arbitrarily.
[0021] FIG. 3B is a sectional view taken along line X-X in FIG. 3A.
A joined portion between the flow path sheet 301 and the sealing
sheet 302 is indicated by a symbol W.
[0022] FIG. 3C is a sectional view taken along line Y-Y in FIG. 3A.
The joined portion between the flow path sheet 301 and the sealing
sheet 302 is indicated by a symbol W. Fluid 307 which has been
accelerated in the channel CH powerfully impinges on a wall of a
tab perpendicularly to perform heat exchange with the flow path
sheet 301. A member obtained by bonding the flow path sheet 301 and
the sealing sheet 302 is called "bonded sheets", and a heat
exchanger provided with the bonded sheets is called "bonded heat
exchanging apparatus". When the bonded sheets are heated to reach a
high temperature, the fluid 307 is heated.
[0023] When the flow path sheet 301 and the sealing sheet 302 are
cooled to reach a low temperature, the fluid 307 is cooled.
[0024] If the bonded sheets are metal sheets, the flow path forming
and the bonding can be performed easily, so that manufacturing a
heat exchanging apparatus can be performed at a low cost.
[0025] As the material for constituting the bonded sheets, there
are heat-conductive plastics. For example, there are plastic
complex materials mixed with carbon nanotubes, graphene, carbon
fibers, metal fibers or the like. Since die stamping and connection
work to these composite materials are possible, a bonded sheet made
plastic of composite material is also utilized in manufacture of
the heat exchanging apparatus 300 instead of the metal sheet.
[0026] Further, when a surrounding material or fluid contacting
with the heat exchanging apparatus has corrosiveness, it is also
possible to line, paint or sheet a surface of the material of the
heat exchanging apparatus 300. Further, it is possible to oxide the
surface of the material to protect the heat exchange apparatus 300
with an oxidized film.
[0027] Screwing can be adopted for joining bonded sheets. A rubber
packing, a carbon packing, another sealing packing can be used for
joining for bonded sheets.
[0028] The joining using adhesive is possible.
[0029] The fluid may be gas containing air or liquid containing
water.
[0030] Water is special material. Since water can be used as
material for steam gas without preparing gas particularly, it can
be utilized as gas which does not contain oxygen gas.
[0031] High-temperature steam having a temperature exceeding
100.degree. C. is high in ability for decomposing organic matter.
When high-temperature steam having a temperature of about
1000.degree. C. is caused to contact with organic waste such as
meat, vegetable, wood piece, or plastics, the molecules of the
waste are cut or decomposed so that gas containing hydrogen,
carbon, and oxygen is generated.
[0032] Even if a temperature of steam is lower than this
temperature (about 1000.degree. C.), for example, when
high-temperature steam of about 300.degree. C. is caused to contact
with meat, the meat can be changed to soft meat to be bitten easily
due to change of sinews in the meat. This can be applied to safe
barbecue which does not use flame.
[0033] The above gas having a high chemical potential extracted by
causing the above high-temperature steam and waste to contact with
each other can be reused as energy resource. Therefore, the bonded
heat exchanging apparatus constitutes a treatment apparatus for
organic waste.
[0034] The heat exchanging apparatus 300 is a unit formed in a flat
plate shape, but it may be formed in a triangular shape, a
rectangular shape or another polygonal tube. When the heat
exchanging apparatus 300 is manufactured from a plate shaped in a
circular pipe instead of material of the flat plate shape, it can
be formed in a cylindrical shape.
[0035] The shapes and the number of fluid outlets 304 and fluid
inlets 306 and positions to which the fluid outlets 304 and the
fluid inlets 306 are attached may be designed arbitrarily. When a
plurality of heat exchanging apparatuses 300 are connected, the
plurality of heat exchanging apparatuses 300 can be connected in
series by connecting the fluid inlets and the fluid outlets to one
another, or the plurality of heat exchanging apparatuses 300 can
also be connected in parallel by connecting the fluid inlets to
each other and connecting the fluid outlets to one another.
[0036] It is possible to attach a plurality of heat exchanging
apparatuses 300 to a surface of another tube or plate without
changing the shapes of the heat exchanging apparatuses 300.
[0037] It is possible to attach a heater to the heat exchanging
apparatus 300 or put the heat exchanging apparatus 300 in heated
medium in order to heat fluid.
[0038] It has been found that it is effective to introduce air
heated to a high temperature, for example, in order to enhance a
combustion efficiency of a boiler. In order to achieve this object,
it is desirable to cause the heat exchanging apparatus 300 to
contact with a combustion chamber or an exhaust piping of the
boiler or put the heat exchanging apparatus 300 in the combustion
chamber or the exhaust piping to heat air and introduce the air
which has been heated as heated air.
[0039] In order to cool fluid, it is possible to cause cooling
medium to contact with the heat exchanging apparatus 300 or put the
heat exchanging apparatus 300 in low-temperature medium.
[0040] For example, it is possible to cool high-temperature gas
efficiently by causing the high-temperature gas from a turbine to
pass through the heat exchanging apparatus 300 as fluid to immerse
the heat-exchanging apparatus 300 in sea water and cool the
same.
[0041] There is such a case that it is desired to perform heat
exchanging between first gas and second gas instantaneously. In
order to achieve this object, it is desirable to join a first heat
exchanging apparatus 300 and a second heat exchanging apparatus 300
to each other via sealing sheets 302 thereof in a back to back
fashion and causing the first gas to pass through the first heat
exchanging apparatus 300 while causing the second gas to pass
through the second heat exchanging apparatus 300.
[0042] For example, when it is desired to cool ammonia used in
geothermal power generation with air, it is desirable to utilize
high-temperature ammonia gas as the first gas and utilize air as
the second gas.
[0043] First Embodiment: one or more embodiments of the present
invention are heat exchanging apparatuses where a flow path having
air tightness is formed by a structure having a second sheet joined
to a first sheet having grooves formed by bending the first sheet
by stamping, wherein the grooves are composed of lateral grooves
opened outward at a side face of the first sheet, elongated in one
direction and formed in another direction different from the one
direction with predetermined intervals in a plural-stage fashion,
and a plurality of longitudinal grooves causing the lateral grooves
adjacent to each other to communicate with each other to connect
the lateral grooves, the longitudinal grooves being perpendicular
to the lateral grooves; a flow path through which fluid introduced
into a lateral groove at one end of the flow path flows to a
lateral groove at the other end of the flow path via the lateral
grooves and the longitudinal grooves; and fluid introduced into the
flow path impinges on a wall of the flow path perpendicularly to
perform heat exchange and the fluid is caused to flow out of a
fluid outlet port at the other end of the flow path.
[0044] Second Embodiment: one or more embodiments of the present
invention are heat exchanging apparatuses of the above first
embodiment, wherein the first sheet and the second sheet are each
either one of an iron sheet, a stainless steel sheet, an aluminum
sheet, a brass sheet, and a plastic composite material sheet mixed
with carbon nanotubes, graphene, carbon fibers, or metal
fibers.
[0045] Third Embodiment: one or more embodiments of the present
invention are heat exchanging apparatuses according to the above
first embodiment or second embodiment, wherein a surface of the
first sheet and the second sheet are each either one of lined with
resin, painted, plated or oxidized to be coated with an oxide
film.
[0046] Fourth Embodiment: one or more embodiments of the present
invention are heat exchanging apparatuses according to any one of
the above first embodiment to third embodiment, wherein the sheets
are joined by either one of a weld joint, a crimp joint, a screw
joint, and an adhesive joint. A weld joint may be of the type
formed by either one of joining using an electrical welder (a tool
for causing large current to flow to contact faces to join both the
contact faces), joining performed by electric welding, joining
performed by argon welding, and joining performed by silver solder
welding. A screw joint may be of the type formed by joining
performed by screwing via a seal packing interposed between the
sheets.
[0047] Fifth Embodiment: one or more embodiments of the present
invention are heat exchanging apparatuses according to any one of
the above first embodiment to fourth embodiment, wherein the fluid
is either one of gas containing air, liquid containing water, and
gas containing radioactive element.
[0048] Six Embodiment: one or more embodiments of the present
invention are heat exchanging apparatuses according to any one of
the above first embodiment to fifth embodiment, wherein the heat
exchanging apparatus heats the fluid by adopting either one of the
heat exchanging apparatus being attached with a heater and the heat
exchanging apparatus being put in a high-temperature medium.
[0049] Seventh Embodiment: one or more embodiments of the present
invention are heat exchanging apparatuses according to any one of
the above first embodiment to fifth embodiment, wherein the heat
exchanging apparatus cools the fluid by adopting either one of the
heat exchanging apparatus being caused to contact with a
low-temperature medium and the heat exchanging apparatus being put
in a low-temperature medium.
[0050] Eighth Embodiment: one or more embodiments of the present
invention are heat exchanging apparatuses having two heat
exchanging apparatuses joined together, the heat exchanging
apparatuses being any one of the above first embodiment to seventh
embodiment to cause first fluid and second fluid to pass through
the two heat exchanging apparatuses.
[0051] Ninth Embodiment: one or more embodiments of the present
invention are apparatuses which causes high-temperature steam
produced by any one of the first embodiment to eighth embodiment
and organic matter to contact with each other.
[0052] According to one or more embodiments of the present
invention, it is made possible to manufacture a heat exchanging
apparatus for fluid by only forming a flow path for heat exchange
on a bendable sheet, particularly a sheet metal by die stamping and
welding another sheet metal to the bendable sheet without depending
on cutting work to a base body which takes time.
[0053] The number of steps is reduced so that a manufacturing cost
of a heat exchanging apparatus can be reduced.
[0054] As the material for the first sheet and the second sheet, a
metal, a surface-treated metal, a resin-lined metal, a metal having
a surface coated with an oxidized film, and a plastic composite
material with an increased heat conductivity can be used. It is
possible to select a material preventing corrosion or wearing due
to contact with fluid or heat medium from these materials.
[0055] Accordingly, it is possible to heat and cool fluid such as
corrosive chemicals or toxic gas having permeability.
[0056] According to one or more embodiments of the present
invention, joining of two sheets can be performed simply. When the
sheets are metal sheets, they can be joined by welding or using an
electric welder. When the sheets are made of plastics, they can be
joined by adhesive. Crimping is an easy method utilized for making
a canned food. Since these methods for joining and forming are
simple and an existing equipment can be used, a manufacturing cost
at a manufacturing time of the heat exchanging apparatus can be
reduced.
[0057] According to one or more embodiments of the present
invention, gas and liquid can be handled as the fluid.
[0058] When oxygen is selected as the fluid, heated oxygen can be
produced instantaneously. When hydrogen or formic acid is selected
as the fluid, high-temperature reducing gas can be produced
instantaneously. When an oxidized film on a bump surface is
reduced, melting of the bump occurs at a low temperature with good
reproducibility, so that a bump joining step becomes stable.
[0059] When air and utility gas are selected as the fluid, it
becomes possible to mix high-temperature air and fuel and introduce
them into a boiler, a combustion temperature becomes high, and a
combustion efficiency rises, which results in saving of the utility
gas. The heated air elevates a combustion efficiency of an internal
combustion engine, which can result in saving of fuel such as heavy
oil.
[0060] When water is changed to steam having a temperature of
100.degree. C. or more, it becomes possible to perform heating or
drying in a non-oxygen state. When mutton with a rib is roasted by
steam having 300.degree. C., sinews in the mutton became soft.
[0061] Even in drying for dry cleaning disfavoring oxidation, or
even in instantaneous drying of printing ink, high-temperature
steam can be produced at hand to be utilized.
[0062] When it is desired to heat material chips with a high
adiabaticity included in a container, it takes much time for
heating the container when the material chips have a high
adiabaticity.
[0063] In such a case, it is possible to heat or melt an adiabatic
material in a short time by introducing heated steam, air, or
nitrogen into the container. When it is desired to mix adiabatic
materials different in melting temperature from each other, it is
desirable to heat the respective materials by gas in advance. In
such a case, gas heated to a desired temperature by the heat
exchanging apparatus can be utilized.
[0064] When a radioactive contaminant is cooled by water in a
nuclear power plant, water radioactively contaminated is produced,
so that it is troubling to treat the contaminated water. There is
an idea for performing cooling with air so as not to produce
contaminated water. In such a case, an apparatus for cooling a
large amount of air in site instantaneously is required. Of course,
the heat exchanging apparatus is suitable to achieve the
object.
[0065] According to one or more embodiments of the present
invention, an electric heater or high-temperature exhaust gas can
be used as a high-temperature medium in order to heat a heat
exchanging apparatus. Since there is a risk of a skin burn at a
high-temperature time, the heat exchanging apparatus is enclosed by
an adiabatic material and is housed in a case.
[0066] When a user desires to cool the heat exchanging apparatus to
a low temperature, it is possible to cause the heat exchanging
apparatus to contact with water serving as the low-temperature
medium or immerse the heat exchanging apparatus in water.
[0067] According to one or more embodiments of the present
invention, it is possible to exchange only heat between gas and
gas, between liquid and gas, and between liquid and liquid without
causing them to contact with each other. Since the contact is
performed in a back to back fashion, a volume of the heat
exchanging apparatus is small and a heat exchanging efficiency is
high. A heat exchanging method which can avoid such a problem as
corrosion or wearing, or toxicity is made possible by selecting a
material for the heat exchanging apparatus. When this structure is
used in an indoor unit and an outdoor unit of a cooler, a volume is
small, which is different from a finned pipe having a large volume,
so that such an effect that the indoor unit and the outdoor unit
can be reduced in size, respectively can be achieved.
[0068] According to one or more embodiments of the present
invention, it is possible to extract gas with high chemical
potential from meat, vegetable or wood pieces to reuse the gas as a
fuel resource.
BRIEF DESCRIPTION OF DRAWINGS
[0069] FIG. 1 is a schematic view showing one example of a
conventional gas heating apparatus;
[0070] FIG. 2 (consisting of views labelled FIGS. 2A, 2B, 2C and
2D) is a schematic view showing one example of a conventional gas
heating apparatus;
[0071] FIG. 3A is a schematic view of a bonded heat exchanging
apparatus, FIG. 3B is a sectional view of the bonded heat
exchanging apparatus taken along line X-X in FIG. 3A, and FIG. 3C
is a sectional view of the bonded heat exchanging apparatus taken
along line Y-Y in FIG. 3A;
[0072] FIG. 4 is a schematic view of a heat exchanging apparatus
with one side attached with a heater;
[0073] FIG. 5A is a schematic view of a bonded tubular heat
exchanging apparatus, and FIG. 5B is a sectional view of the bonded
tubular heat exchanging apparatus taken along line X-X in FIG.
5A;
[0074] FIG. 6A is a sectional view of a bonded cylindrical heat
exchanging apparatus taken along line Y-Y in FIG. 6B, and FIG. 6B
is a sectional view of the bonded cylindrical heat exchanging
apparatus taken along line X-X in FIG. 6A;
[0075] FIG. 7A is a schematic view of a back-to-back heat
exchanging apparatus, and FIG. 7B is a sectional view of the
back-to-back heat exchanging apparatus taken along line XX in FIG.
7A; and
[0076] FIG. 8 is a schematic view of a bonded cylindrical heat
exchanging apparatus which has been wholly immersed in heat
medium.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
[0077] A first example is shown in FIG. 4.
[0078] A bonded heat exchanging apparatus 400 is manufactured from
a stainless steel sheet. A flow path sheet 401 with a flow path
formed by applying die stamping to a stainless steel sheet is
manufactured. A depth of a tab of the flow path is 5 mm, a width
thereof is 5 mm and a length thereof is 5 cm. Buffer tabs 403 and
404 having the same depth and length as those of the tab and having
a width of 15 mm are provided at both ends of the flow path, and
they are provided with a fluid inlet 405 and a fluid outlet 406
made of stainless steel pipes of 1/4 inches through welding. A
width of a channel is 2 mm, a length thereof is 6 mm, and a depth
thereof is 2 mm.
[0079] The above flow path sheet 401 and a sealing sheet 402 having
a thickness of 2 mm are welded to each other to have air tightness.
A flow path 407 serving as a flow path having air tightness is
constituted of the flow path sheet 401 and the sealing sheet 402,
so that the bonded heat changing apparatus 400 is constituted.
[0080] A heater 408 is bonded to the sealing sheet 402 of the
bonded heat exchanging apparatus 400, and ends of the sealing sheet
402 are bent to be welded to an adiabatic member 409. The adiabatic
member 409 is a member obtained by enclosing adiabatic material by
a stainless steel sheet with a thickness of 0.05 mm in a bag
shape.
[0081] The heater 408 and the bonded heat exchanging apparatus 400
are surrounded by the adiabatic member 409 and they are fixed to a
case 410 manufactured by a stainless steel sheet with a thickness
of 1 mm.
[0082] A power feeding wire of the heater 408 and a thermocouple
for temperature measurement not shown go out of the case 410.
[0083] When air is introduced from the fluid inlet 405 while the
temperature indicated by the thermocouple is controlled to be
constant, heated air goes out of the fluid outlet 406. When the
temperature of the thermocouple is controlled in response to the
temperature of the heated air, air having a temperature kept in a
set temperature goes out.
[0084] A second example is shown in FIGS. 5A and 5B.
[0085] FIG. 5A is a schematic view of a bonded tubular heat
exchanging apparatus 500 formed in a tubular shape so as to
position a tubular sealing sheet 501 inside. Four flow path sheets
502, 503, 504, and 505 separated from one another are formed on one
tubular sealing sheet 501 made of one iron sheet such that a tube
can be formed in a bending manner. Ends of the tubular sealing
sheet 501 bent are welded to each other.
[0086] Inlets 506 and 508 and outlets 507 and 509 of fluid 511
indicated by arrows in FIG. 5B are provided in the four flow path
sheets 502, 503, 504, and 505. Though the inlets and the outlets
are depicted in their released states, they are connected to other
configurations in response to their objects.
[0087] Heat medium 510 flows inside the tubular sealing sheet 501.
The heat medium 510 can be selected arbitrarily in response to an
intended purpose of the tubular heat exchanging apparatus 500.
[0088] When the tubular heat exchanging apparatus 500 is connected
to a combustion gas exhaust pipe of a boiler, combustion gas
constitutes the heat medium 510. When the fluid 511 is air, the air
can be heated by the heat medium 510. When heated air is used for
combustion in a boiler, a combustion efficiency is enhanced. When
the fluid 511 is water, high-temperature steam can be produced by
heating the water.
[0089] A third example is shown in FIGS. 6A and 6B.
[0090] FIGS. 6A and 6B are schematic views showing a structure of a
cylindrical heat exchanging apparatus 600 obtained by bonding a
cylindrical flow path sheet 602 to a cylindrical sealing sheet 601.
FIG. 6A is a sectional view of the bonded cylindrical heat
exchanging apparatus taken along line Y-Y in FIG. 6B, and FIG. 6B
is a sectional view of the bonded cylindrical heat exchanging
apparatus taken along line X-X in FIG. 6A.
[0091] The cylindrical flow path sheet 602 forms a flow path for
the heat medium 510. The fluid 511 enters the flow path from a
fluid inlet 603 and goes out of a fluid outlet 606 through
cylindrical buffer tabs 604 and 605 of the cylindrical flow path
sheet 602.
[0092] The heat medium 510 flows inside the cylindrical flow path
sheet 602. The heat medium 510 can be selected arbitrarily in
response to an intended purpose of the cylindrical heat exchanging
apparatus 600.
[0093] When the cylindrical heat exchanging apparatus 600 is
connected to a combustion gas exhaust pipe of a boiler, combustion
gas constitutes the heat medium 510. When the fluid 511 is air, the
air can be heated by the heat medium 510. When heated air is used
for combustion in a boiler, a combustion efficiency is enhanced.
When the fluid 511 is water, high-temperature steam can be produced
by heating the water.
[0094] When cooling medium is utilized as the heat medium 510, the
fluid 511 is cooled.
[0095] Accordingly, the structure can be utilized for heat exchange
in an indoor unit or an outdoor unit of an air conditioner. Since a
heat exchanging efficiency of the flow path structure is high,
there is such a merit that the size of the indoor unit or the
outdoor unit can be made smaller than that of a conventional
equipment using pipes and fins.
[0096] A fourth example is shown in FIGS. 7A and 7B.
[0097] FIGS. 7A and 7B are schematic views showing a heat
exchanging apparatus structure of two heat exchanging apparatuses
bonded in a back-to-back fashion. FIG. 7A is a schematic view
showing a structure obtained by bonding a first flow path sheet 701
and a second flow path sheet 702 to a sealing sheet 703 from both
faces of the sealing sheet 703. That is, FIG. 7A shows a structure
of a back-to-back heat exchanging apparatus 700.
[0098] FIG. 7B is a sectional view of the back-to-back heat
exchanging apparatus 700 taken along line X-X in FIG. 7A.
[0099] First fluid 708 enters a flow path from a first fluid inlet
706 to be subjected to heat exchange by the first flow path sheet
701 and goes out of a first fluid outlet 704.
[0100] Second fluid 709 enters a flow path from a second fluid
inlet 707 to be subjected to heat exchange by the second flow path
sheet 702 and goes out of a second fluid outlet 705.
[0101] In the structure, the first fluid 708 and the second fluid
709 function as heat mediums to each other.
[0102] That is, two fluids perform heat exchanges to each other via
the heat exchanging apparatus 700 efficiently.
[0103] A fifth embodiment is shown in FIG. 8.
[0104] FIG. 8 is a schematic view showing a bonded heat exchanging
apparatus which has been wholly immersed in heat medium. A heat
exchanging apparatus 800 contacts with heat medium 801 via all
faces thereof to be heated or cooled. The heat medium 801 may be
heated liquid or gas. Further, the heat medium 801 may be cooled
liquid or gas.
[0105] As the heated liquid, there is water or air which has been
heated by geothermal energy, and there is sea water as the cooled
liquid.
[0106] Though only one heat exchanging apparatus 800 is shown, many
heat exchanging apparatuses may be immersed, they may be arranged
in a regular fashion, they may be connected to one another in
series or connected to one another in parallel, and arbitrary
design can be adopted.
[0107] The present invention provides a small-sized and
light-weight part for producing a large amount of gas or liquid
which has been heated up to a high temperature at a low price. An
application field can involve drying of printed matter, a
small-sized air conditioning equipment, heat exchange in a heating
and cooling apparatus for material containing toxic substance or
radioactive substance, or corrosive material, rapid producing of
high-temperature steam, a heating and vaporizing apparatus for
wastes, melding of industrial waste plastics, or the like. The
present invention is suitable for a technique of heating and
film-forming a solar cell or a flat panel display (FPD) on a
large-sized substrate such as a glass substrate.
[0108] The present invention is not limited to the embodiments
described explicitly, and it includes variants and generalizations
which are within the competence of the person skilled in the
art.
REFERENCE NUMBERS IN THE DRAWINGS
[0109] 101 gas inlet [0110] 102 hollow disc [0111] 103 pipe [0112]
104 gas outlet [0113] 300 bonded heat exchanging apparatus [0114]
301, 401, 502, 503, 504, 505 flow path sheet [0115] 302, 402
sealing sheet [0116] 303, 405, 506, 508, 603, 802 fluid inlet
[0117] 304, 406, 507, 509, 606, 803 fluid outlet [0118] 305, 306,
403, 404 buffer tab [0119] 307 fluid [0120] CH1, CH2, CH3, CH4,
CH5, CH6 channel [0121] T1, T2, T3, T4, T5, T6 tab [0122] W joining
[0123] 400 bonded heat exchanging apparatus [0124] 407 flow path
[0125] 408 heater [0126] 409 adiabatic member [0127] 410 case
[0128] 411 power feeding wire [0129] 500 tubular heat exchanging
apparatus [0130] 501 tubular sealing sheet [0131] 510 heat medium
[0132] 511 liquid [0133] 600 bonded cylindrical heat exchanging
apparatus [0134] 601 cylindrical sealing sheet [0135] 602
cylindrical flow path sheet [0136] 604, 605 cylindrical buffer tab
[0137] 700 back-to-back heat exchanging apparatus [0138] 701 first
fluid path sheet [0139] 702 second fluid flow path sheet [0140] 703
sealing sheet [0141] 704 first fluid outlet [0142] 705 second fluid
outlet [0143] 706 first fluid inlet [0144] 707 second fluid inlet
[0145] 708 first fluid [0146] 709 second fluid [0147] 800 bonded
heat exchanging apparatus [0148] 801 heat medium
* * * * *