U.S. patent number 3,723,707 [Application Number 05/173,461] was granted by the patent office on 1973-03-27 for humidifier.
This patent grant is currently assigned to Turmix AG. Invention is credited to Max Wunderlin.
United States Patent |
3,723,707 |
Wunderlin |
March 27, 1973 |
**Please see images for:
( Certificate of Correction ) ** |
HUMIDIFIER
Abstract
A humidifier having automatic control means respective to the
degree of moisture in the air of the space to be humidified is
provided with a hygrostatic switch located directly on the
humidifier, thus dispensing with wiring connections between the
humidifier and a hygrostatic switch located at a distance
therefrom. A current of air from the space to be humidified is
drawn past the hygrostatic switch as a convection current caused by
disposing the air inlet, into an outer casing surrounding a cold
water container and a heated water container, at a point adjacent
the cold water container and disposing the air outlet at a point
distant from the air inlet and adjacent the heated water
container.
Inventors: |
Wunderlin; Max (Mannedorf,
CH) |
Assignee: |
Turmix AG (Kusnacht,
CH)
|
Family
ID: |
22632143 |
Appl.
No.: |
05/173,461 |
Filed: |
August 20, 1971 |
Current U.S.
Class: |
392/405; 261/142;
219/518; 261/DIG.65; 219/386; 261/DIG.34 |
Current CPC
Class: |
F24F
6/025 (20130101); Y10S 261/34 (20130101); Y10S
261/65 (20130101) |
Current International
Class: |
F24F
6/02 (20060101); F22b 001/28 () |
Field of
Search: |
;219/271,272,276,314,332,362,363,366,385,386,518
;261/DIG.34,DIG.46,DIG.65,129,139,142 ;236/44R ;126/113
;237/1R |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Albritton; C. L.
Claims
I claim:
1. A humidifier comprising a container having two communicating
chambers, a heating device mounted in one chamber for vaporizing
water supplied to said chamber from the second chamber disposed
side by side to said one chamber and including cold water, a
housing surrounding the container so as to form an air channel
between the housing and the container extending across opposite
side walls and the bottom wall of the container, the housing having
an air inlet opening adjacent to the cold water chamber and an air
outlet opening therein adjacent said chamber for vaporizing water,
said inlet opening and outlet opening being connected by said air
channel, the ends to the air channel being of different temperature
and due to convection causing a flow of air from the exterior into
the channel and through the channel, and a hygrostatic switch
mounted in the air channel adjacent said air inlet opening and
acted upon by the flow of air from the exterior, so as to control
the heating device upon the humidity of the surrounding air
decreasing below or increasing above a predetermined value.
2. A humidifier according to claim 1, characterized in that the
communicating chambers of the container are separated by at least
one separating wall of insulating material.
3. A humidifier according to claim 1, characterized in that the
cold water chamber of the container is separated from the adjacent
air channel and the hygrostatic switch at the air inlet opening by
a separating wall of insulating material.
4. Humidifier according to claim 1, characterized in that the air
inlet and the air outlet openings are located in the housing close
to its upper edge and are of a size suitable to form hand holds in
order to carry the humidifier.
5. A humidifier according to claim 1, characterized in that upon
reaching an intended value for the moisture, the hygrostatic switch
will switch the heating device to a reduced heating performance in
order to maintain a convection current.
Description
CROSS REFERENCES TO RELATED APPLICATIONS
Applicant claims priority from corresponding Austrian Pat.
application No. 9 A 7631/70, filed Aug. 21, 1970.
BACKGROUND OF THE INVENTION
Field of the Invention
For humidifying of the air in homes and offices, various types of
known air humidifiers are used nowadays, in which water is either
atomized, evaporated or vaporized. If it is desired to have
automatic control of the moisture in the room, then a hygrostatic
switch, required for this purpose, must be arranged at some
distance from the humidifier so that it will be exposed to the
actual moisture values in the room, and it must be connected by
cables with the heating arrangement of the humidifier. Since in the
case of known humidifiers the air around them is not or is only
insufficiently circulated, a hygrostatic switch disposed directly
on the humidifier would respond to the immediate moisture and
temperature around the device, which do not correspond to the
actual conditions inside the whole room.
SUMMARY OF THE INVENTION
The invention consists in providing a humidifier with automatic
control of moisture with a hygrostatic switch so located that no
cable connection to the humidifier will be required. This objective
can be achieved by using a humidifier already known, with a
container subdivided into two communicating spaces, the heating
arrangement being disposed in the smaller space and a supply of
cold water in the larger space, so that the container will have a
hot and a cold zone, and if one utilizes the convection current
occurring between two air spaces in the case of a temperature
difference, for the purpose of bringing the air in the room, which
is to be measured in regard to its moisture value, by means of
ejector action to a hygrostatic switch disposed on the
humidifier.
To achieve this, the humidifier, with a container subdivided into
two communicating spaces and intended for the reception of the
water that is to be evaporated by means of a heating arrangement
disposed in the one space, according to the invention is
characterized by the fact that the container is surrounded by a
housing, part of which is spaced at a distance from the container,
and the areas of the container and housing spaced at a distance one
from the other define an air path which connects an air inlet,
provided in the housing adjacent to the cold water space, with an
air outlet provided in the housing adjacent to the hot water space,
and in the air path and close to the air inlet a hygrostatic switch
acted upon by the air, streaming in from the outside because of the
convection, has been disposed. The convection current is optimal
whenever the air inlet and the air outlet openings are provided in
the housing at those places having the largest temperature
difference. When, in a preferred embodiment of the humidifier, the
container has a rectangular outline and its two communicating
spaces are located one beside the other, then effectively the air
inlet and the air outlet openings are provided in the housing at
opposite sides of the container and at those locations which, in
each case, are the farthest distant from the separating wall
between the two spaces, so that there will be either no, or the
least possible, heat conduction from the hot water space to the
cold water space. One or more insulating walls are provided as
separating walls for practical purposes between these two cpaces,
and in the same way the cold water space of the container can be
effectively separated by an insulating wall from the adjoining air
space, and the hygrostatic switch close to the air opening disposed
in said air space.
BRIEF DESCRIPTION OF THE DRAWING
Further characteristics, details and advantages of the invention
will be apparent from the description which follows in conjunction
with the drawing, in which
FIG. 1 diagrammatically illustrates an embodiment of the invention
purely by way of example.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The humidifier has a tank 10 for the reception of the water that is
to be evaporated and which is subdivided by means of a separating
wall 11, with an insulation 12, into two communicating spaces 13
and 14, the connection of the communicating spaces being formed by
a channel in the shape of a hose or pipe 15. The heating
arrangement in the form of a cartridge 16 is disposed in the
smaller space 13. The steam emerges at the top from an opening 17
from the space 13 containing the water that is to be evaporated, in
order to humidify the air in the room or office. The larger cold
water space 14 has an upper filling opening 18 for filling it with
water. The wall of the cold water space 14, opposite the adjacent
hot water space 13, has been equipped with an insulation 19 forming
the wall.
The entire container 10 comprising both spaces 13 and 14 surrounded
by a housing 20, at least a part of which is spaced from the
container and the housing, spaced one from the other, define an air
path 21, which connects an air inlet opening 22, provided in the
housing adjacent to the cold water space 14, with an air outlet
opening 23 provided in the housing 20 adjacent to the hot water
space 13. In order to form the air path leading from one side of
the humidifier to the opposite side of it, the housing must not be
widely spaced from the entire outside surface of the container, but
a certain zone extending along the entire container from one side
to the other will be sufficient, in which the air path is formed as
a result of this spacing of the container from the housing. Near
the inlet opening 22 for the air, a hybrostatic switch 24 has been
disposed in the air path 21, that is to say, between the container
and the housing, which can be operated from the outside with an
adjusting knob 25.
Since the air in the air space 21, heated by the hot water space
13, escapes through the air outlet opening, air from the room will
be sucked in through the air inlet opening 22 and flow around the
hygrostatic switch disposed below said opening, so that the latter
will be capable of control based on the actual moisture values
inside the living space. So that at least a slight convection
current will be maintained in air space 21 whenever the desired
value of the moisture has been achieved in the living space, the
heating arrangement can be automatically switched over to a reduced
heating performance, so that the hot water space will transmit
sufficient radiant heat to the air space below the air exit
opening.
The humidifier stands on several legs 30 and an additional leg 31,
which has been developed as a switch counteracting, by way of
spring action, the weight of the water in the container, which
switch automatically interrupts the supply of current to the
heating device upon reaching a minimum water level in the container
and in consequence of the release of the spring occurring thereby.
In order to transport the humidifier, the two air inlet and air
outlet openings are developed and dimensioned on the upper edge in
such a way as to provide hand holds.
* * * * *