CN219494272U - Air conditioning unit - Google Patents
Air conditioning unit Download PDFInfo
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- CN219494272U CN219494272U CN202223419729.1U CN202223419729U CN219494272U CN 219494272 U CN219494272 U CN 219494272U CN 202223419729 U CN202223419729 U CN 202223419729U CN 219494272 U CN219494272 U CN 219494272U
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- branch
- pipeline
- communicated
- defrosting
- heat exchanger
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 34
- 238000010257 thawing Methods 0.000 claims abstract description 99
- 238000005338 heat storage Methods 0.000 claims abstract description 73
- 238000005057 refrigeration Methods 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 abstract description 20
- 238000001816 cooling Methods 0.000 abstract description 3
- 239000003507 refrigerant Substances 0.000 description 20
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The utility model discloses an air conditioning unit, which comprises a heat pump circulation loop and a defrosting circulation loop, wherein a first branch communicated with an inlet pipeline and an outlet pipeline of an indoor unit is arranged in the heat pump circulation loop, a heat storage module and a heat storage throttling device are arranged on the first branch, the air conditioning unit also comprises a second branch, one end of the second branch is communicated with an inlet of the indoor unit, the other end of the second branch is communicated with an air suction port of a defrosting compressor, and a second control valve is arranged on the second branch; and one end of the third branch is communicated with the second end of the fourth pipeline of the outdoor heat exchanger, the other end of the third branch is communicated with the first end of the third pipeline of the outdoor heat exchanger, and a third control valve is arranged on the third branch. The utility model can not only continuously supply heat to the room during heating and ensure the comfort, but also participate in the refrigeration operation of the defrosting circulation loop during cooling to the room, thereby improving the refrigeration efficiency of the whole machine.
Description
Technical Field
The utility model relates to the technical field of air conditioners, in particular to a heat pump air conditioner unit with double systems.
Background
The conventional heat pump air conditioning system unit generally comprises a compressor, a four-way valve, a condenser, a throttling device, an evaporator and other functional components, and the refrigerating or heating function of the air conditioner is realized through switching of the four-way valve. When the air conditioning system operates the heating function, the low-temperature refrigerant needs to absorb heat from the outdoor heat exchanger to gasify, when the outdoor environment temperature is relatively low, the outdoor heat exchanger can frost, and the heat exchange effect of the outdoor heat exchanger can be seriously affected along with the gradual increase of the thickness of the frosting layer, so that the indoor heating efficiency is rapidly reduced. At this time, defrosting of the outdoor heat exchanger is required. When the defrosting condition is reached, the indoor fan and the outdoor fan are stopped, the four-way valve is reversed, and the high-temperature and high-pressure refrigerant discharged by the compressor flows into the outdoor heat exchanger to release heat and melt the frosting layer on the surface of the outdoor heat exchanger. In the defrosting operation process, the indoor unit stops heating
And turn to cool, resulting in a significant drop in indoor temperature, affecting comfort.
In order to solve the contradiction between defrosting and comfort, one solution is to introduce a defrosting circulation loop and a heat storage module connecting the heat pump circulation loop and the defrosting circulation loop, and when the air conditioning system is in heating operation, a part of high-temperature refrigerant flows into the heat storage module and releases heat, and the released heat is absorbed and stored by a heat storage medium in the heat storage module. When the outdoor heat exchanger needs defrosting, the refrigerant discharged by the defrosting compressor enters the heat storage module after passing through the outdoor heat exchanger and the defrosting throttling device, absorbs heat in the heat storage medium to gasify, and then returns to the defrosting compressor for circulation. Because the heat pump air conditioning loop and the defrosting loop share the outdoor heat exchanger, heat can be continuously supplied to the indoor when the outdoor unit is defrosted, and the comfort of a user is improved. However, in such a system, when the outdoor heat exchanger does not need defrosting, the defrosting circuit is idle and does not work, resulting in low utilization rate of the equipment.
Disclosure of Invention
The utility model provides an air conditioning unit, which aims to solve the technical problems of long idle time and low utilization rate of unit part equipment with a defrosting loop in the prior art.
The utility model adopts the technical scheme that an air conditioning unit is designed, and comprises:
the heat pump circulation loop comprises a heat pump compressor, an outdoor heat exchanger and an indoor unit, wherein a third pipeline is arranged in the outdoor heat exchanger, the first end of the third pipeline is communicated with an outlet of the indoor machine heating state, and the second end of the third pipeline is communicated with an air suction port of the heat pump compressor;
the defrosting circulation loop comprises a defrosting compressor, the outdoor heat exchanger and a heat storage module, wherein a fourth pipeline is arranged in the outdoor heat exchanger, the first end of the fourth pipeline is communicated with an exhaust pipe of the defrosting compressor, and the second end of the fourth pipeline is communicated with an inlet end of the heat storage module;
one end of the first branch is communicated with the first end of the third pipeline of the outdoor heat exchanger, the other end of the first branch is communicated with the exhaust pipe of the heat pump compressor, and a heat storage module and a heat storage throttling device are arranged on the first branch;
the air conditioning unit further includes: one end of the second branch is communicated with an inlet of the indoor machine heating state, the other end of the second branch is communicated with an air suction port of the defrosting compressor, and a second control valve is arranged on the second branch; and one end of the third branch is communicated with the second end of the fourth pipeline of the outdoor heat exchanger, the other end of the third branch is communicated with the first end of the third pipeline of the outdoor heat exchanger, and a third control valve is arranged on the third branch.
The heat storage module comprises a heat storage medium, a first pipeline communicated with the heat pump circulation loop and a second pipeline communicated with the defrosting circulation loop.
Preferably, the heat storage medium is a mixture of graphite and paraffin.
Preferably, the first and second pipes are staggered.
Preferably, the third and fourth pipes in the outdoor heat exchanger are staggered.
In an embodiment, the heat storage module and the heat storage throttling device are integrally arranged and detachably connected with the outdoor unit.
In another embodiment, the heat storage module and the heat storage throttle device are disposed in an outdoor unit.
When the defrosting circulation loop participates in refrigeration circulation, the second control valve on the second branch and the third control valve on the third branch are opened, and the first control valve connected with the heat storage module on the defrosting circulation loop is closed.
When the defrosting circulation loop operates, the second control valve on the second branch and the third control valve on the third branch are closed, and the heat storage throttling device on the first branch and the defrosting throttling device at the front end of the heat storage module on the defrosting circulation loop and the first control valve are both opened.
In a preferred embodiment, the air conditioning unit according to the present utility model includes:
the heat pump circulation loop comprises a heat pump compressor, a four-way valve, an outdoor heat exchanger, a throttling device and an indoor unit, wherein a third pipeline is arranged in the outdoor heat exchanger, the first end of the third pipeline is communicated with an outlet of the indoor machine heating state, and the second end of the third pipeline is communicated with an air suction port of the heat pump compressor;
the defrosting circulation loop comprises a defrosting compressor, the outdoor heat exchanger, a first control valve, a one-way valve, a defrosting throttling device and a heat storage module, wherein a fourth pipeline is arranged in the outdoor heat exchanger, the first end of the fourth pipeline is communicated with an exhaust pipe of the defrosting compressor, and the second end of the fourth pipeline is communicated with an inlet end of the heat storage module;
the first branch is provided with a heat storage module and a heat storage throttling device, a first pipeline and a second pipeline are arranged in the heat storage module, the first pipeline is communicated with a heat pump circulation loop, and the second pipeline is communicated with a defrosting circulation loop;
the air conditioning unit further includes: one end of the second branch is communicated with an inlet of the indoor machine heating state, the other end of the second branch is communicated with an air suction port of the defrosting compressor, and a second control valve and a one-way valve are arranged on the second branch; and one end of the third branch is communicated with the second end of the fourth pipeline of the outdoor heat exchanger, the other end of the third branch is communicated with the first end of the third pipeline of the outdoor heat exchanger, and a third control valve and a one-way valve are arranged on the third branch.
Compared with the prior art, the utility model has the following beneficial effects:
1. when the air conditioning unit is in refrigeration operation, the defrosting circulation loop participates in refrigeration operation, so that the utilization rate of the defrosting loop and the refrigeration efficiency of the unit are improved.
2. When the air conditioning unit provided by the utility model is used for defrosting an outdoor heat exchanger, the heat pump circulation loop does not need to be switched by the four-way valve, and the air conditioning unit enters a refrigerating mode to operate, and high-temperature high-pressure gas of the defrosting circulation loop enters the outdoor heat exchanger to defrost, so that continuous heating of the air conditioning unit is realized, the stability of indoor temperature is maintained, and the comfort of the air conditioning is improved.
Drawings
The utility model will be described in detail below with reference to the attached drawing figures and specific examples, wherein:
FIG. 1 is a schematic diagram of a heat pump air conditioning system according to the present utility model, with arrows showing the refrigeration cycle;
fig. 2 is a schematic diagram of another embodiment of the present utility model.
Wherein: the heat pump type air conditioner comprises a heat pump compressor 1, a four-way valve 2, an outdoor heat exchanger 3, a throttling device 4, an indoor unit 5, a stop valve 6, a heat storage module 7, a first branch circuit 8, a heat storage throttling device 9, a pipeline after defrosting throttling 10, an air suction pipe of a defrosting compressor 11, a second control valve 12, a defrosting throttling device 13, a second branch circuit 14, a third branch circuit 15, a defrosting compressor 16, a third control valve 19, a one-way valve 20, a first control valve 21, an outdoor unit 22, an indoor unit 51, an indoor unit throttling device 52, an indoor heat exchanger 53 and an indoor unit fan 53.
Detailed Description
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in detail with reference to the accompanying drawings and examples. The term "communicating" as used herein means that the two parts can communicate with each other, and it is not excluded that other parts are provided between the two parts. It should be understood that the following specific examples are given by way of illustration only and are not intended to be limiting.
The heat pump air conditioner set provided by the utility model comprises two circulation loops, namely a heat pump circulation loop and a defrosting circulation loop, wherein the two circulation loops share an outdoor heat exchanger. The heat pump circulation loop comprises a heat pump compressor 1, a four-way valve 2, an outdoor heat exchanger 3, a throttling device 4 and an indoor unit 5. The defrost cycle comprises a defrost compressor 16, an outdoor heat exchanger 3, a first control valve 21, a one-way valve 20, a defrost throttle 13 and a thermal storage module 7.
The heat pump circulation loop further comprises a first branch 8, a heat storage module is arranged on the heat pump circulation loop, a first pipeline and a second pipeline are arranged in the heat storage module, the first pipeline is communicated with the heat pump circulation loop, the second pipeline is communicated with the defrosting circulation loop, and heat energy is transferred between the heat pump circulation loop and the defrosting circulation loop through the heat storage module. In addition, two branches which are controlled to be disconnected by a control valve are arranged between the heat pump circulation loop and the defrosting circulation loop, so that low-temperature low-pressure liquid refrigerant in the defrosting circulation loop flows into the indoor unit for refrigeration when the heat pump circulation loop performs refrigeration operation, and the refrigeration effect of the whole machine is improved.
As shown in fig. 1, the heat pump air conditioner includes an indoor unit 5 and an outdoor unit 22, and a heat pump compressor 1, a four-way valve 2, an outdoor heat exchanger 3, a throttle device 4, and the like are disposed in the outdoor unit. The indoor unit 5 comprises an indoor unit throttling device 51, an indoor heat exchanger 52 and an indoor unit fan 53, and an inlet pipeline and an outlet pipeline of the indoor unit are communicated with the outdoor unit through a stop valve 6. In the heating operation of the heat pump cycle, the high-temperature and high-pressure refrigerant discharged from the heat pump compressor 1 is introduced into the indoor unit 5 through the four-way valve 2 and the stop valve 6, and after the heat release of the indoor unit, the refrigerant flows through the indoor unit throttle device 51, the stop valve 6, the throttle device 4, the outdoor heat exchanger 3 and the four-way valve 2 in order, and returns to the air inlet of the compressor 1 for recirculation. During the refrigeration operation of the heat pump circulation loop, the high-temperature and high-pressure refrigerant discharged from the compressor 1 enters the indoor unit after entering the four-way valve 2 for reversing, passes through the outdoor heat exchanger 3, the throttling device 4 and the stop valve 6, passes through the indoor unit throttling device 51, absorbs heat and gasifies in the indoor heat exchanger 52, and then returns to the air suction port of the heat pump compressor 1 after passing through the stop valve 6 and the four-way valve 2 to form refrigeration circulation. Both the outdoor heat exchanger 3 and the indoor heat exchanger 52 are provided with fans for enhancing the air flow and the heat exchange effect.
The double-system heat pump circulation loop provided by the utility model further comprises a first branch 8 communicated with the inlet pipeline and the outlet pipeline of the indoor unit, and the heat storage module 7 and the heat storage throttling device 9 are sequentially arranged on the first branch.
The heat storage module 7 comprises a first pipeline and a second pipeline, and adopts a two-in and two-out structure, wherein the first pipeline is communicated with the heat pump circulation loop, and the second pipeline is communicated with the defrosting circulation loop. The thermal storage module is filled with a thermal storage medium, which in this embodiment is a mixture of graphite and paraffin. Preferably, the first pipeline and the second pipeline are arranged in a staggered mode, so that heat exchange is more uniform.
When the heat pump circulation loop is in heating operation, a part of high-temperature and high-pressure refrigerant flowing out of the four-way valve 2 is separated into a first branch 8 and releases heat in the heat storage module 7, the released heat is absorbed and stored by a heat storage medium in the heat storage module, and the released refrigerant is depressurized by the heat storage throttling device 9 and is then converged into a liquid outlet pipe of the indoor unit. When the heat pump cycle is in a cooling operation, the heat storage throttling device 9 is closed, and the first branch is in an open state and does not participate in the circulation of the refrigerant.
The defrosting circulation loop starts a refrigerating operation mode when unit control logic judges that defrosting is required to operate, high-temperature and high-pressure refrigerant discharged by the defrosting compressor 16 flows into the outdoor heat exchanger 3 and releases heat in the outdoor heat exchanger, frosts on the surfaces of fins of the outdoor heat exchanger are defrosted, the refrigerant after heat release flows to the heat storage module 7 through the first control valve 21, the one-way valve 20 and the defrosting throttling device 13, absorbs heat stored by a heat storage medium in the heat storage module to be gasified, and then returns to an air suction port of the defrosting compressor 16 to be recycled.
In the above embodiment, the heat pump circulation loop and the defrosting circulation loop share the outdoor heat exchanger 3, the outdoor heat exchanger adopts a fin type heat exchanger, and a third pipeline and a fourth pipeline are arranged in the outdoor heat exchanger, the third pipeline is communicated with the heat pump circulation loop, and the fourth pipeline is communicated with the defrosting circulation loop. The third pipeline and the fourth pipeline are formed by connecting U-shaped pipes and elbows, and the two pipelines can be arranged in a concentrated mode in a partition mode or in a staggered mode, and the outdoor heat exchanger is heated more uniformly everywhere during defrosting.
As shown in fig. 1, the heat pump air conditioning unit provided by the utility model is provided with a second branch 14 and a third branch 15 between a heat pump circulation loop and a defrosting circulation loop respectively. One end of the second branch is communicated with one end (heat storage module heat storage inlet pipe) of the first branch 8, and the other end is connected to the air suction pipe 11 of the defrosting compressor 16. The second branch is provided with a second control valve 12 and a one-way valve 20 in sequence. One end of the third branch 15 is arranged at the second end of the fourth pipeline of the outdoor heat exchanger, the other end is arranged at the first end of the third pipeline of the outdoor heat exchanger, namely the pipeline between the outdoor heat exchanger 3 and the throttling device 4, and the third branch is provided with a third control valve 19 and a one-way valve 20.
When the heat pump air conditioning unit heats, the heat pump circulation loop works, the first pipeline and the second pipeline in the heat storage module 7 exchange heat through the heat storage medium, the heat storage medium absorbs heat energy released by the refrigerant and stores the heat energy, and the heat absorbed by the heat storage medium is absorbed by the low-temperature medium throttled by the defrosting circulation loop, so that heat energy which takes the heat storage medium of the heat storage module as an intermediary is transferred between the heating circulation loop and the defrosting circulation loop.
And the outdoor heat exchanger 3 shared by the heat pump circulation loop and the defrosting circulation loop is used for conducting heat exchange with low-temperature refrigerant in the heat pump circulation loop in the third pipeline when defrosting, and the purpose of defrosting the outdoor heat exchanger is achieved by enabling the frosting layer in the low-temperature area to be heated and melted.
Therefore, in the double-system heat pump air conditioner unit with the heat storage module, the operation of the heating circulation loop and the defrosting circulation loop are not interfered with each other, and the heating circulation loop and the defrosting circulation loop can operate simultaneously, namely the indoor machine can perform defrosting on the outdoor heat exchanger while heating, so that the defrosting of the outdoor heat exchanger is realized without reversing and converting the four-way valve into a refrigerating operation mode when the air conditioner is in hot operation, that is, low-temperature refrigerant in the defrosting loop cannot flow into the indoor machine, the purpose of continuously heating the indoor machine can be achieved, and the comfort of the indoor air conditioner is improved.
When the heat pump air conditioning unit operates in the refrigeration mode, the heat pump circulation loop works, and the unit control unit controls the second control valve 12 on the second branch and the third control valve 19 on the third branch to be on, and the first control valve 21 at the front end of the defrosting throttle valve 13 is off. The high-temperature and high-pressure refrigerant discharged by the defrosting compressor 16 is connected into a first end pipeline of a third pipeline of the outdoor heat exchanger through a third branch 15 after being subjected to heat release by the outdoor heat exchanger 3, is sent to the indoor unit for cooling together with the refrigerant in the refrigeration cycle loop through the throttling device 4, and is divided into two parts after the indoor unit finishes heat absorption, one part of the refrigerant returns to the heat pump compressor 1 for circulation after passing through the four-way valve, and the other part of the refrigerant returns to the defrosting compressor 16 in the defrosting cycle loop through the second branch 14 for recirculation. Therefore, the defrosting compressor 16 of the double-system air conditioning unit with the heat storage module also participates in the refrigeration operation during the refrigeration operation, so that the overall efficiency of the refrigeration operation of the unit is improved.
The defrosting compressor preferably selects a variable frequency compressor to control the actual output power of the compressor, so that the defrosting heat quantity of the outdoor heat exchanger can be controlled. When the outdoor heat exchanger does not need defrosting or the defrosting degree is very slight, the operation output power of the defrosting compressor is close to zero, and the outdoor heat exchanger can be stopped at the moment; with the increase of the frosting severity of the outdoor heat exchanger, the operation output power of the defrosting compressor is gradually increased, the purpose of rapid defrosting is achieved, and therefore, the outdoor heat exchanger fan and the indoor unit fan can be stopped without defrosting under reasonable control logic and parameter control in the heating operation process, namely, the purpose of continuously heating the indoor unit is achieved, and the comfort of the air conditioner is greatly improved.
In the embodiment shown in fig. 1, the first branch 8, the heat storage module 7 and the defrosting throttle device 9 are arranged outdoors as part of the outdoor unit, and the air conditioner is positioned between the air pipeline and the liquid pipeline at one side of the stop valve 6, so that the air conditioner has the advantages of compact structure and convenient engineering installation.
As an alternative embodiment, the first branch 8 and the heat storage module 7 and the defrosting throttle device 9 thereon may be installed outdoors as separate components and communicated with the outdoor unit through a pipe, and this arrangement requires the addition of two more connecting pipeline shut-off valves 6, see in detail fig. 2. The reason for installing the first branch 8 and the heat storage module 7 and the defrosting throttle device 9 thereon as separate components is that the installation position of the outdoor unit is sometimes limited, and the installation position of the separate components can be flexibly moved.
The double-system heat pump air conditioning unit with the heat storage module can be used for a single-unit system with one unit or a multi-unit air conditioning system with one unit.
The foregoing is only a specific embodiment of the utility model. It should be noted that any modifications, equivalent substitutions and variations made within the spirit and scope of the inventive concept should be included in the scope of the present utility model.
Claims (9)
1. An air conditioning unit comprising:
the heat pump circulation loop comprises a heat pump compressor, an outdoor heat exchanger and an indoor unit, wherein a third pipeline is arranged in the outdoor heat exchanger, the first end of the third pipeline is communicated with an outlet of the indoor unit, and the second end of the third pipeline is communicated with an air suction port of the heat pump compressor;
the defrosting circulation loop comprises a defrosting compressor, the outdoor heat exchanger and a heat storage module, wherein a fourth pipeline is arranged in the outdoor heat exchanger, the first end of the fourth pipeline is communicated with an exhaust pipe of the defrosting compressor, and the second end of the fourth pipeline is communicated with an inlet end of the heat storage module;
one end of the first branch is communicated with the first end of the third pipeline of the outdoor heat exchanger, the other end of the first branch is communicated with the exhaust pipe of the heat pump compressor, and a heat storage module and a heat storage throttling device are arranged on the first branch;
characterized by further comprising: one end of the second branch is communicated with the inlet of the indoor unit, the other end of the second branch is communicated with the air suction port of the defrosting compressor, and a second control valve is arranged on the second branch; and one end of the third branch is communicated with the second end of the fourth pipeline of the outdoor heat exchanger, the other end of the third branch is communicated with the first end of the third pipeline of the outdoor heat exchanger, and a third control valve is arranged on the third branch.
2. The air conditioning unit of claim 1, wherein the thermal storage module includes a thermal storage medium therein, a first conduit in communication with the heat pump cycle, and a second conduit in communication with the defrost cycle.
3. The air conditioning unit according to claim 2, wherein the first and second pipes are staggered.
4. The air conditioning unit according to claim 1, wherein the third and fourth tubes in the outdoor heat exchanger are staggered.
5. The air conditioning unit according to claim 1, wherein the heat storage module and the heat storage throttle device are integrally provided to be detachably connected to the outdoor unit.
6. The air conditioning unit according to claim 1, wherein the heat storage module and the heat storage throttle device are provided in an outdoor unit.
7. The air conditioning unit according to claim 1, wherein when the defrosting cycle circuit participates in a refrigeration cycle, the second control valve on the second branch and the third control valve on the third branch are opened, and the first control valve on the defrosting cycle circuit connected to the heat storage module is closed.
8. The air conditioning unit according to claim 1, wherein when the defrosting circulation loop is in defrosting operation, the second control valve on the second branch and the third control valve on the third branch are closed, and the heat storage throttling device on the first branch and the defrosting throttling device and the first control valve on the front end of the heat storage module on the defrosting circulation loop are both opened.
9. An air conditioning unit comprising:
the heat pump circulation loop comprises a heat pump compressor, a four-way valve, an outdoor heat exchanger, a throttling device and an indoor unit, wherein a third pipeline is arranged in the outdoor heat exchanger, the first end of the third pipeline is communicated with an outlet of the indoor unit, and the second end of the third pipeline is communicated with an air suction port of the heat pump compressor;
the defrosting circulation loop comprises a defrosting compressor, the outdoor heat exchanger, a first control valve, a one-way valve, a defrosting throttling device and a heat storage module, wherein a fourth pipeline is arranged in the outdoor heat exchanger, the first end of the fourth pipeline is communicated with an exhaust pipe of the defrosting compressor, and the second end of the fourth pipeline is communicated with an inlet end of the heat storage module;
the first branch is provided with a heat storage module and a heat storage throttling device, a first pipeline and a second pipeline are arranged in the heat storage module, the first pipeline is communicated with a heat pump circulation loop, and the second pipeline is communicated with a defrosting circulation loop;
characterized by further comprising: one end of the second branch is communicated with the inlet of the indoor unit, the other end of the second branch is communicated with the air suction port of the defrosting compressor, and a second control valve and a one-way valve are arranged on the second branch; and one end of the third branch is communicated with the second end of the fourth pipeline of the outdoor heat exchanger, the other end of the third branch is communicated with the first end of the third pipeline of the outdoor heat exchanger, and a third control valve and a one-way valve are arranged on the third branch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223419729.1U CN219494272U (en) | 2022-12-20 | 2022-12-20 | Air conditioning unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223419729.1U CN219494272U (en) | 2022-12-20 | 2022-12-20 | Air conditioning unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219494272U true CN219494272U (en) | 2023-08-08 |
Family
ID=87484469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223419729.1U Active CN219494272U (en) | 2022-12-20 | 2022-12-20 | Air conditioning unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219494272U (en) |
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2022
- 2022-12-20 CN CN202223419729.1U patent/CN219494272U/en active Active
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