U.S. patent application number 17/305277 was filed with the patent office on 2022-09-22 for vapor injection device and compressor.
The applicant listed for this patent is Nanjing Aotecar New Energy Technology Co., LTD., Nanjing Aotecar Xiangyun Refrigerator Co., LTD.. Invention is credited to Xiangji CHEN, Tao DING, Aijun LIU, Ao ZOU.
Application Number | 20220299026 17/305277 |
Document ID | / |
Family ID | 1000005749284 |
Filed Date | 2022-09-22 |
United States Patent
Application |
20220299026 |
Kind Code |
A1 |
DING; Tao ; et al. |
September 22, 2022 |
VAPOR INJECTION DEVICE AND COMPRESSOR
Abstract
Provided are a vapor injection device and a compressor. The
vapor injection device includes an injector valve plate, an
injector plate, and an injector reed valve. One side of the
injector plate facing toward the injector valve plate is provided
with an avoidance groove. A guide post is disposed protruding from
one side of the injector plate facing away from the injector valve
plate. The guide post is inserted into a fixed scroll of the
compressor and provided with an injection channel. A vapor
injection inlet cavity is formed between the rear housing, the
injector valve plate, and the fixed scroll. The injector reed valve
is disposed between the injector valve plate and the injector plate
and attaches to the injector valve plate, the injector reed valve
is provided with a movable sheet, and the movable sheet, the
injector valve plate and the avoidance groove form a one-way valve
structure.
Inventors: |
DING; Tao; (Nanjing, CN)
; CHEN; Xiangji; (Nanjing, CN) ; LIU; Aijun;
(Nanjing, CN) ; ZOU; Ao; (Nanjing, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Nanjing Aotecar New Energy Technology Co., LTD.
Nanjing Aotecar Xiangyun Refrigerator Co., LTD. |
Nanjing City
Nanjing City |
|
CN
CN |
|
|
Family ID: |
1000005749284 |
Appl. No.: |
17/305277 |
Filed: |
July 2, 2021 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F04C 2/025 20130101;
F04C 2240/30 20130101; F04C 29/0007 20130101; F04C 2210/228
20130101; F04C 15/06 20130101; F04C 18/0261 20130101; F04C 18/0215
20130101; F04C 29/128 20130101; F04C 29/042 20130101 |
International
Class: |
F04C 15/06 20060101
F04C015/06; F04C 2/02 20060101 F04C002/02 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 18, 2021 |
CN |
202110292863.0 |
Claims
1. A vapor injection device for vapor injection of a compressor,
wherein a rear housing of the compressor is provided with a vapor
injection port, and the vapor injection device comprises: an
injector valve plate disposed in the rear housing, wherein the
injector valve plate is provided with a via hole; an injector plate
disposed in the rear housing, wherein one side of the injector
plate facing toward the injector valve plate is provided with an
avoidance groove, a guide post is disposed protruding from one side
of the injector plate facing away from the injector valve plate,
the guide post is inserted into a fixed scroll of the compressor,
an injection channel is disposed in the guide post, and a vapor
injection inlet cavity is formed between the rear housing, the
injector valve plate, and the fixed scroll; and an injector reed
valve disposed between the injector valve plate and the injector
plate, wherein the injector reed valve is attached to the injector
valve plate, wherein the injector reed valve is provided with a
movable sheet, and the movable sheet, the injector valve plate and
the avoidance groove form a one-way valve structure such that a
vapor injection refrigerant entering from the vapor injection port
sequentially passes through the vapor injection inlet cavity, the
via hole and the one-way valve structure and enters the fixed
scroll through the injection channel.
2. The vapor injection device of claim 1, wherein a movable gap is
disposed between the movable sheet and the injector reed valve, and
the movable gap has a U-shaped structure.
3. The vapor injection device of claim 1, further comprising a
first sealing ring, wherein the first sealing ring is sleeved on
the injector plate and disposed between the injector plate and an
inner wall of the rear housing.
4. The vapor injection device of claim 3, wherein the first sealing
ring is configured to divide the inner wall of the rear housing
into the vapor injection inlet cavity and an exhaust high-pressure
cavity.
5. The vapor injection device of claim 1, further comprising a
second sealing ring, wherein the second sealing ring is sleeved on
the guide post and disposed between the injector plate and the
fixed scroll.
6. The vapor injection device of claim 1, further comprising a
positioning member, wherein the positioning member extends into the
injector plate, the injector reed valve, and the injector valve
plate.
7. The vapor injection device of claim 1, further comprising a snap
spring, wherein the snap spring is sleeved on the injector plate
and disposed between the injector plate and the rear housing to
limit an axial position of the injector plate.
8. A compressor, comprising a body, an orbit scroll, a fixed
scroll, a rear housing and a vapor injection device which are
sequentially connected, wherein the rear housing is provided with a
vapor injection port, and the vapor injection device comprises: an
injector valve plate disposed in the rear housing, wherein the
injector valve plate is provided with a via hole; an injector plate
disposed in the rear housing, wherein one side of the injector
plate facing toward the injector valve plate is provided with an
avoidance groove, a guide post is disposed protruding from one side
of the injector plate facing away from the injector valve plate,
the guide post is inserted into a fixed scroll of the compressor
and provided with an injection channel, and a vapor injection inlet
cavity is formed between the rear housing, the injector valve
plate, and the fixed scroll; and an injector reed valve disposed
between the injector valve plate and the injector plate, wherein
the injector reed valve is attached to the injector valve plate,
wherein the injector reed valve is provided with a movable sheet,
and the movable sheet, the injector valve plate and the avoidance
groove form a one-way valve structure such that a vapor injection
refrigerant entering from the vapor injection port sequentially
passes through the vapor injection inlet cavity, the via hole and
the one-way valve structure and enters the fixed scroll through the
injection channel, wherein a suction port is disposed on the body,
the orbit scroll is disposed in the body and rotatable relative to
the fixed scroll, and the vapor injection device is disposed
between the fixed scroll and the rear housing and configured to
supply air to the fixed scroll.
9. The compressor of claim 8, wherein one side of the fixed scroll
facing toward the orbit scroll is provided with a fixed scroll
plate, one side of the orbit scroll facing toward the fixed scroll
is provided with an orbit scroll plate, a compression cavity is
formed between the fixed scroll plate and the orbit scroll plate,
and the compression cavity is in communication with the suction
port and the vapor injection device.
10. The compressor of claim 9, wherein a bottom of the fixed scroll
plate is provided with an injection hole, and the vapor injection
device is in communication with the injection hole.
Description
CROSS-REFERENCE TO RELATED APPLICATION(S)
[0001] This application claims priority to Chinese Patent
Application No. 202110292863.0 filed Mar. 18, 2021, the disclosure
of which is incorporated herein by reference in its entirety.
TECHNICAL FIELD
[0002] The present disclosure relates to the technical field of air
condition compressors, in particular, a vapor injection device and
a compressor.
BACKGROUND
[0003] In the field of automobiles, a compressor is typically used
as a device for compressing a refrigerant. Different from the
traditional fossil-fuelled vehicles, electric vehicles have no
engine and most of the electric vehicles use PTC heating, and thus
the heating efficiency of the electric vehicle is low. Therefore,
it is necessary to adopt a heat pump system to satisfy the heating
requirements of vehicles in a low-temperature environment. As a
consequence, in addition to refrigeration requirements for a
low-temperature heat pump electric compressor, the low-temperature
heat pump electric compressor further needs to provide larger
heating capacity and higher efficiency in the low-temperature
environment. However, a conventional electric vortex compressor has
a too low suction pressure in a low-temperature environment below
-20.degree. C., which results in insufficient heating capacity and
a too high exhaust temperature. Therefore, the problems such as low
working efficiency, wear between mechanical parts due to long-term
operation, failure of refrigerant oil exist.
[0004] In order to solve the problems, an existing compressor
utilizes a vapor injection assembly to implement the function of
supplying air. The vapor injection assembly includes a cover plate,
a one-way valve, a sealing gasket and a bolt. The vapor injection
assembly has a complex structure so that the volume and the weight
of the compressor are increased, the assemblability gets worse, and
production processes become more, thus leading to higher production
cost. Meanwhile, the one-way valve structure leads to excessive
pressure drop, and the excessive pressure drop leads to the delay
of vapor injection and affects the efficiency of the
compressor.
SUMMARY
[0005] Aspects of the present disclosure provide a vapor injection
device and a compressor to ensure the compression effect in a
low-temperature environment, and the structure is simple and the
production cost is low.
[0006] In an aspect, provided is a vapor injection device used for
vapor injection of a compressor. A rear housing of the compressor
is provided with a vapor injection port. The vapor injection device
includes an injector valve plate, an injector plate, and an
injector reed valve.
[0007] In an aspect, the injector valve plate is disposed in the
rear housing, and the injector valve plate is provided with a via
hole.
[0008] In an aspect, the injector plate is disposed in the rear
housing, one side of the injector plate facing toward the injector
valve plate is provided with an avoidance groove, a guide post is
provided with protruding from one side of the injector plate facing
away from the injector valve plate, the guide post is inserted into
a fixed scroll of the compressor, an injection channel is disposed
in the guide post, and a vapor injection inlet cavity is formed
between the rear housing, the injector valve plate, and the fixed
scroll.
[0009] In an aspect, the injector reed valve is disposed between
the injector valve plate and the injector plate. The injector reed
valve is attached to the injector valve plate. The injector reed
valve is provided with a movable sheet, and the movable sheet, the
injector valve plate and the avoidance groove form a one-way valve
structure such that a vapor injection refrigerant entering from the
vapor injection port sequentially passes through the vapor
injection inlet cavity, the via hole and the one-way valve
structure and enters the fixed scroll through the injection
channel.
[0010] In an aspect, a movable gap is disposed between the movable
sheet and the injector reed valve, and the movable gap has a
U-shaped structure.
[0011] In an aspect, the vapor injection device further includes a
first sealing ring, and the first sealing ring is sleeved on the
injector plate and disposed between the injector plate and an inner
wall of the rear housing.
[0012] In an aspect, the first sealing ring is configured to divide
the inner wall of the rear housing into the vapor injection inlet
cavity and an exhaust high-pressure cavity.
[0013] In an aspect, the vapor injection device further includes a
second sealing ring, and the second sealing ring is sleeved on the
guide post and disposed between the injector plate and the fixed
scroll.
[0014] In an aspect, the vapor injection device further includes a
positioning member, and the positioning member extends into the
injector plate, the injector reed valve, and the injector valve
plate.
[0015] In an aspect, the vapor injection device further includes a
snap spring, and the snap spring is sleeved on the injector plate
and disposed between the injector plate and the rear housing to
limit an axial position of the injector plate.
[0016] To achieve the above-mentioned aspects, the present
disclosure further provides a compressor including a body, an orbit
scroll, a fixed scroll, a rear housing and the above-mentioned
vapor injection device which are sequentially connected. A suction
port is disposed on the body, the orbit scroll is disposed in the
body and rotatable relative to the fixed scroll, and the vapor
injection device is disposed between the fixed scroll and the rear
housing and configured to supply air to the fixed scroll.
[0017] In an aspect, one side of the fixed scroll facing toward the
orbit scroll is provided with a fixed scroll plate, one side of the
orbit scroll facing toward the fixed scroll is provided with an
orbit scroll plate, a compression cavity is formed between the
fixed scroll plate and the orbit scroll plate, and the compression
cavity is in communication with the suction port and the vapor
injection device.
[0018] In an aspect, a bottom of the fixed scroll plate is provided
with an injection hole, and the vapor injection device is in
communication with the injection hole.
[0019] According to the vapor injection device provided by an
aspect of the present disclosure, when it is necessary to supply
air, the vapor injection refrigerant enters the vapor injection
inlet cavity through the vapor injection port and flows into the
via hole of the injector valve plate such that a pressure
difference exists between two sides of the injector reed valve. In
this manner, the movable sheet on the injector reed valve opens
towards the injector plate, the vapor injection refrigerant enters
the injector plate, the guide post of the injector plate guides the
vapor injection refrigerant into the injection hole of the fixed
scroll, and the vapor injection refrigerant is jetted into the
compression cavity through the injection hole for secondary
compression. The guide post is directly docked to the fixed scroll
such that the reliability of the vapor injection refrigerant
transmission is ensured. The injection channel is disposed in the
guide post 22 such that the optimization of the air flow channel is
achieved. The injection channel has a linear structure such that
the bending in the flow of the vapor injection refrigerant is
reduced, and thus the pressure drop is reduced and a higher vapor
injection efficiency is obtained.
[0020] In an aspect of the present disclosure, the one side of the
injector plate facing toward the injector valve plate is provided
with the avoidance groove such that the avoidance groove plays a
role in avoiding the movable sheet. A free end of the movable sheet
moves in a direction away from the injector reed valve so that the
vapor injection refrigerant flowing out of the via hole of the
injector valve plate can enter the gap between the movable sheet
and the injector reed valve. The avoidance groove provides a moving
space for the movable sheet so as to ensure that the movable sheet
opens in the direction toward the injector plate. The injector reed
valve is disposed between the injector valve plate and the injector
plate and attaches to the injector valve plate such that the
injector valve plate plays a role in limiting an opening direction
of the movable sheet. If the free end of the movable sheet moves
toward the injector valve plate, the injector valve plate has a
flat plate structure, so it is difficult for the injector valve
plate to provide a moving space for the movable sheet. In this
manner, the movable sheet can be opened only in a direction facing
toward the injector plate, and the air in the compression cavity is
prevented from flowing backward into the vapor injection inlet
cavity. Compared with a spring one-way valve of the related art,
the one-way valve structure formed by the movable sheet, the
injector valve plate and the avoidance groove does not need to be
provided with parts such as a spring and a bolt, thereby reducing
the number of parts and complexity, simplifying the structure of
parts, reducing the cost, and meanwhile improving the sensitivity
and stability.
[0021] In an aspect of the present disclosure, in the vapor
injection device, the rear housing of the compressor is provided
with the vapor injection port, and a part of the medium and high
pressure refrigerant in the system is directly introduced into the
compression cavity of the compressor through the vapor injection
device to increase the flow rate of the refrigerant so that the
compressor can obtain higher heating capacity in a low-temperature
environment.
[0022] In an aspect of the present disclosure, a compressor is
provided, and the vapor injection device is configured to supply
air to the fixed scroll. Under the joint action of the vapor
injection port and the vapor injection device, the function of
vapor injection of a suction port is achieved so that sufficient
supply of refrigerant can be ensured, thereby solving the problem
of insufficient heating in the low-temperature environment and
ensuring the working efficiency of the compressor.
BRIEF DESCRIPTION OF DRAWINGS
[0023] FIG. 1 is a structural schematic view of a compressor
according to an aspect of the present disclosure;
[0024] FIG. 2 is an exploded view of the compressor according to an
aspect of the present disclosure;
[0025] FIG. 3 is a cross-sectional view of a fixed scroll and an
orbit scroll in the compressor according to an aspect of the
present disclosure;
[0026] FIG. 4 is a partial cross-sectional view of a vapor
injection device according to an aspect of the present disclosure;
and
[0027] FIG. 5 is a structural schematic view of an injector plate
of the vapor injection device according to an aspect of the present
disclosure.
REFERENCE LIST
[0028] 100 body
[0029] 101 suction port
[0030] 200 orbit scroll
[0031] 201 orbit scroll plate
[0032] 300 fixed scroll
[0033] 301 fixed scroll plate
[0034] 302 injection hole
[0035] 400 rear housing
[0036] 401 exhaust port
[0037] 402 vapor injection port
[0038] 500 compression cavity
[0039] 1 injector valve plate
[0040] 2 injector plate
[0041] 3 injector reed valve
[0042] 4 vapor injection inlet cavity
[0043] 5 first sealing ring
[0044] 6 second sealing ring
[0045] 7 positioning member
[0046] 8 snap spring
[0047] 9 exhaust high-pressure cavity
[0048] 11 via hole
[0049] 21 avoidance groove
[0050] 22 guide post
[0051] 221 injection channel
[0052] 31 movable sheet
DETAILED DESCRIPTION
[0053] To clarify solved problems, adopted solutions and achieved
effects of the present disclosure, aspects of the present
disclosure will be further described in conjunction with the
drawings. Apparently, the aspects described below are part, not
all, of aspects of the present disclosure. Based on aspects of the
present disclosure, all other aspects obtained by those skilled in
the art are within the scope of the present disclosure on the
premise that no creative work is done.
[0054] In the description of the present disclosure, unless
otherwise expressly specified and limited, terms "connected to each
other", "connected" or "fixed" are to be construed in a broad
sense, for example, as permanently connected, detachably connected,
or integrated; mechanically connected or electrically connected;
directly connected to each other or indirectly connected to each
other via an intermediary; or internally connected or interactional
between two components. For those of ordinary skill in the art,
specific meanings of the above terms in the present disclosure may
be understood based on specific circumstances.
[0055] In the present disclosure, unless otherwise expressly
specified and limited, when a first feature is described as "above"
or "below" a second feature, the first feature and the second
feature may be in direct contact or be in contact via another
feature between the two features. Moreover, when the first feature
is described as "on", "above" or "over" the second feature, the
first feature is right on, above or over the second feature or the
first feature is obliquely on, above or over the second feature, or
the first feature is simply at a higher level than the second
feature. When the first feature is described as "under", "below" or
"underneath" the second feature, the first feature is right under,
below or underneath the second feature or the first feature is
obliquely under, below or underneath the second feature, or the
first feature is simply at a lower level than the second
feature.
[0056] Aspects of the present disclosure will be further described
below in conjunction with the drawings.
[0057] In one aspect, a compressor is provided. As shown in FIG. 1,
the compressor includes a body 100 and a rear housing 400 connected
to the body 100, the body 100 is provided with a suction port 101,
and the rear housing 400 is provided with an exhaust port 401. The
suction port 101 is a main intake passage. Refrigerant is sucked
into the body 100 from the suction port 101 and discharged from the
exhaust port 401 after air compression is completed. In order to
fully compress the air, as shown in FIG. 2, an accommodation cavity
is formed between the body 100 and the rear housing 400. The
accommodation cavity is used for accommodating a motor, an orbit
scroll 200 and a fixed scroll 300. The motor drives the orbit
scroll 200 to rotate relative to the fixed scroll 300 through a
crankshaft so as to compress the refrigerant.
[0058] In an aspect, as shown in FIG. 3, one side of the fixed
scroll 300 facing toward the orbit scroll 200 is provided with a
fixed scroll plate 301, and the fixed scroll plate 301 extends
outwardly along a vortex line structure from a center of the fixed
scroll 300. One side of the orbit scroll 200 facing toward the
fixed scroll 300 is provided with an orbit scroll plate 201, and
the orbit scroll plate 201 extends outwardly along a vortex line
structure from the center of the fixed scroll 300. A compression
cavity 500 is formed between the fixed scroll plate 301 and the
orbit scroll plate 201, and the compression cavity 500 communicates
with the suction port 101. The refrigerant sucked from the suction
port 101 enters the compression cavity 500 and is guided to a
center of the fixed scroll 300 along a sidewall of the orbit scroll
plate and a sidewall of the fixed scroll plate under the guidance
of the fixed scroll plate 301 and the orbit scroll plate 201. In
this manner, the purpose of compressing the refrigerant is achieved
while the refrigerant is converged. An exhaust hole is provided at
the center of the fixed scroll 300, and the exhaust hole
communicates with the exhaust port 401 to discharge the compressed
refrigerant.
[0059] The compressor has a lower suction pressure in the
low-temperature environment thus leading to insufficient heating.
As shown in FIGS. 1 and 2, a vapor injection port 402 is disposed
on the rear housing 400, a vapor injection device is disposed
between the fixed scroll 300 and the rear housing 400, and the
vapor injection port 402 communicates with the vapor injection
device. The vapor injection device is configured to supply air to
the fixed scroll 300. Under the joint action of the vapor injection
port 402 and the vapor injection device, the function of vapor
injection of a suction port 101 is achieved so that sufficient
supply of refrigerant can be ensured, thereby solving the problem
of insufficient heating in the low-temperature environment and
ensuring the working efficiency of the compressor.
[0060] In an aspect, in order to implement the vapor injection of
the vapor injection device to the fixed scroll 300, as shown in
FIG. 3, a bottom of the fixed scroll plate 301 is provided with an
injection hole 302, and the vapor injection device communicates
with the injection hole 302. The bottom of the fixed scroll plate
301 is provided with the injection hole 302 such that the vapor
injection refrigerant enters the compression cavity 500 through the
injection hole 302 to implement the secondary compression of the
refrigerant. It is to be understood that an aperture size of the
injection hole 302 is not limited in this aspect and can be
adjusted according to the actual demand for the heating capacity to
satisfy the user demand.
[0061] Aiming at the problems of complex structure and poor vapor
injection effect of the existing vapor injection assembly, an
aspect of the present disclosure provides a vapor injection device
used for vapor injection of the compressor. As shown in FIGS. 2 and
4, the vapor injection device includes an injector valve plate 1,
an injector plate 2, and an injector reed valve 3, and the injector
valve plate 1, the injector reed valve 3, and the injector plate 2
are sequentially superposed inside the rear housing 400. The rear
housing 400 plays a role in accommodating and integral supporting.
One side of the injector plate 2 facing toward the injector valve
plate 1 is provided with an avoidance groove 21 (as shown in FIG.
5), a guide post 22 is provided protruding from one side of the
injector plate 2 facing away from the injector valve plate 1, and
the guide post 22 has a cylindrical structure and is inserted into
the fixed scroll 300 of the compressor. In an aspect, the guide
post 22 is inserted into the injection hole 302 of the fixed scroll
300.
[0062] As shown in FIGS. 2 and 4, an injection channel 221 is
disposed inside the guide post 22. The injector reed valve 3 is
disposed between the injector valve plate 1 and the injector plate
2 and attaches to the injector valve plate 1. The injector reed
valve 3 is provided with a movable sheet 31, and the movable sheet
31, the injector valve plate 1 and the avoidance groove 21 form a
one-way valve structure. The injector valve plate 1 is provided
with a via hole 11, a vapor injection inlet cavity 4 is formed
between the rear housing 400, the injector valve plate 1, and the
fixed scroll 300 such that the air entering from the vapor
injection port 402 sequentially passes through the vapor injection
inlet cavity 4, the via hole 11, and the one-way valve structure
and enters the fixed scroll 300 through the injection channel
221.
[0063] According to the vapor injection device provided by an
aspect of the present disclosure, when it is necessary to supply
air, the vapor injection refrigerant enters the vapor injection
inlet cavity 4 through the vapor injection port 402 and flows into
the via hole 11 of the injector valve plate 1 such that a pressure
difference exists between two sides of the injector reed valve 3.
In this manner, the movable sheet 31 on the injector reed valve 3
opens towards the injector plate 2, the vapor injection refrigerant
enters the injector plate 2, the guide post 22 of the injector
plate 2 guides the vapor injection refrigerant into the injection
hole 302 of the fixed scroll 300, and the vapor injection
refrigerant is jetted into the compression cavity 500 through the
injection hole 302 for the secondary compression. The guide post 22
is directly docked to the fixed scroll 300 such that the
reliability of the vapor injection refrigerant transmission is
ensured. The injection channel 221 is disposed in the guide post 22
such that the optimization of the air flow channel is achieved. The
injection channel 221 has a linear structure such that the bending
in the flow of the vapor injection refrigerant is reduced, and thus
the pressure drop is reduced and a higher vapor injection
efficiency is obtained.
[0064] The one side of the injector plate 2 facing toward the
injector valve plate 1 is provided with the avoidance groove 21
such that the avoidance groove 21 plays a role in avoiding the
movable sheet 31. A free end of the movable sheet 31 moves in a
direction away from the injector reed valve 3 so that the vapor
injection refrigerant flowing out of the via hole 11 of the
injector valve plate 1 can enter the gap between the movable sheet
31 and the injector reed valve 3. The avoidance groove 21 provides
a moving space for the movable sheet 31 so as to ensure that the
movable sheet 31 opens in the direction toward the injector plate
2. In an aspect, a bottom of the avoidance groove 21 is provided
with a slope having a certain inclination angle so as to limit an
opening size of the movable sheet 31. The injector reed valve 3 is
disposed between the injector valve plate 1 and the injector plate
2 and attaches to the injector valve plate 1 such that the injector
valve plate 1 plays a role in limiting an opening direction of the
movable sheet 31. If the free end of the movable sheet 31 moves
toward the injector valve plate 1, the injector valve plate 1 has a
flat plate structure, so it is difficult for the injector valve
plate 1 to provide a moving space for the movable sheet 31. In this
manner, the movable sheet 31 can be opened only in a direction
facing toward the injector plate 2, and the air in the compression
cavity 500 is prevented from flowing backward into the vapor
injection inlet cavity 4. Compared with a spring one-way valve of
the related art, the one-way valve structure formed by the movable
sheet 31, the injector valve plate 1 and the avoidance groove 21
does not need to be provided with parts such as a spring and a
bolt, thereby reducing the number of parts and complexity,
simplifying the structure of parts, reducing the cost, and
meanwhile improving the sensitivity and stability.
[0065] In the vapor injection device, the rear housing 400 of the
compressor is provided with the vapor injection port 402, and a
part of the medium and high pressure refrigerant in the system is
directly introduced into the compression cavity 500 of the
compressor through the vapor injection device to increase the flow
rate of the refrigerant so that the compressor can obtain higher
heating capacity in the low-temperature environment.
[0066] Furthermore, an exhaust high-pressure cavity 9 is provided
between the fixed scroll 300 and the rear housing 400, the exhaust
high-pressure cavity 9 communicates with the exhaust port 401, and
a central position of the fixed scroll 300 is provided with an
exhaust hole that communicates with the exhaust high-pressure
cavity 9, such that the air converged at the fixed scroll 300
enters the exhaust high-pressure cavity 9 through the exhaust hole
after the refrigerant compression is completed and finally is
discharged from the exhaust port 401.
[0067] Since not only the exhaust high-pressure cavity 9 but also
the vapor injection inlet cavity 4 exists between the fixed scroll
300 and the rear housing 400, in order to avoid leakage between the
fixed scroll 300 and the rear housing 400, the vapor injection
device further includes a first sealing ring 5. The first sealing
ring 5 is sleeved on the injector plate 2 and is disposed between
the injector plate 2 and an inner wall of the rear housing 400. The
first sealing ring 5 implements the radial seal between the
injector plate 2 and the rear housing 400. A traditional sealing
gasket is optimized to a sealing ring for seal so that the
installation positioning and axial limit of the sealing gasket are
prevented, the assemblability is increased, an axial pre-tightening
force does not need to be increased, the assembly accuracy
requirements and processes are reduced, the sealing surface does
not need to be processed with a sealing groove, the structures of
the parts are simple, and the manufacturing processes are reduced.
Meanwhile, the first sealing ring 5 is configured to divide the
inner wall of the rear housing 400 into the vapor injection inlet
cavity 4 and the exhaust high-pressure cavity 9, and the first
sealing ring 5 implements the isolation between the vapor injection
inlet cavity 4 and the exhaust high-pressure cavity 9.
[0068] Furthermore, the vapor injection device further includes a
second sealing ring 6, and the second sealing ring 6 is sleeved on
the guide post 22 and disposed between the injector plate 2 and the
fixed scroll 300. The radial seal between the injector plate 2 and
the fixed scroll 300 is implemented by the sealing ring so that the
axial pre-tightening force does not need to be increased, the
installation is simpler, the sealing surface does not need to be
processed with a sealing groove, the structures of the parts are
simple, and the manufacturing processes are reduced. The axial
rigid limit between the injector plate 2 and the fixed scroll 300
is not needed so a general fixing manner with a bolt is not
adopted.
[0069] Both the first sealing ring 5 and the second sealing ring 6
adopt the radial seal, and there is no requirement for an axial
sealing pressure, so that requirements for bolt installation and
bolt torque are avoided, and man-hours and detection procedures are
reduced.
[0070] It is to be understood that there is no sealing requirement
between the injector reed valve 3 and the injector plate 2, thereby
reducing parts and increasing the assemblability.
[0071] Furthermore, the vapor injection device further includes a
snap spring 8, the snap spring 8 is sleeved on the injector plate 2
and disposed between the injector plate 2 and the rear housing 400
to limit a position of the injector plate 2 in an axial direction
(an axial position of the injector plate). The snap spring 8 is
disposed between the injector plate 2 and the rear housing 400 to
perform axial limiting, and there is no requirement for the axial
pre-tightening force. In an aspect, the inner wall of the rear
housing 400 is provided with an annular groove for mounting the
snap spring 8, an outer wall of the injector plate 2 is provided
with a limiting step surface, and the snap spring 8 is inserted
into the annular groove and abuts with the limiting step surface to
implement the limit of the injector plate 2.
[0072] In order to ensure that the injector plate 2, the injector
reed valve 3 and the injector valve plate 1 can be well positioned,
the vapor injection device further includes a positioning member 7.
In an aspect, the positioning member 7 is a positioning pin, and
the positioning member 7 extends into the injector plate 2, the
injector reed valve 3 and the injector valve plate 1 to achieve the
positioning function. The injector plate 2 and the rear housing 400
are positioned through two positioning pins, one end of the
positioning pin is inserted into the rear housing 400, and another
end of the positioning pin passes through the injector valve plate
1, the injector reed valve 3, and the injector plate 2. The
positioning pin plays a role in preventing dislocation and ensuring
the installation angle, thereby reducing the possibility of
dislocation in the assembly process, and further reducing the
pressure drop in the air flow passage.
[0073] Furthermore, a movable gap is provided between the movable
sheet 31 and the injector reed valve 3, and the movable gap has a
U-shaped structure. In this manner, one end of the movable sheet 31
is connected to the injector reed valve 3 and another end of the
movable sheet 31 is a free end so that a tongue-like shape is
formed. With this structure, the movable sheet 31 has certain
elasticity and can be moved to implement the opening and closing of
the movable sheet 31.
[0074] In the description of the present disclosure, it is to be
understood that the orientation or position relationships indicated
by terms "above", "below", "right" and the like are based on the
orientation or position relationships shown in the drawings, merely
for facilitating description and simplifying operation, and these
relationships do not indicate or imply that the referred device or
component has a specific orientation and is constructed and
operated in a specific orientation, and thus it is not to be
construed as limiting the present disclosure. In addition, the
terms "first" and "second" are merely used for descriptive purposes
and have no special meanings.
[0075] In the description of the specification, the description of
reference terms "one aspect" or "example" means that specific
characteristics, structures, materials or features described in
conjunction with the aspects or the examples are included in at
least one aspect or example of the present disclosure. In the
specification, the illustrative description of the preceding terms
does not necessarily refer to the same aspect or example.
[0076] In addition, the above aspects are merely a preferred
embodiment of the present disclosure and the technical principles
used therein. It is to be understood by those skilled in the art
that the present disclosure is not limited to the aspects described
herein. Those skilled in the art can make various apparent
modifications, adaptations and substitutions without departing from
the scope of the present disclosure. Therefore, while the present
disclosure has been described in detail through the preceding
aspects, the present disclosure is not limited to the preceding
aspects and may further include more other equivalent aspects
without departing from the concept of the present disclosure. The
scope of the present disclosure is determined by the scope of the
appended claims.
* * * * *