CN219656381U - Heat pump defrosting system and heat pump air conditioner - Google Patents
Heat pump defrosting system and heat pump air conditioner Download PDFInfo
- Publication number
- CN219656381U CN219656381U CN202223554258.5U CN202223554258U CN219656381U CN 219656381 U CN219656381 U CN 219656381U CN 202223554258 U CN202223554258 U CN 202223554258U CN 219656381 U CN219656381 U CN 219656381U
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- way valve
- heat exchanger
- heat pump
- electromagnetic
- enthalpy
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- 238000010257 thawing Methods 0.000 title claims abstract description 60
- 239000003507 refrigerant Substances 0.000 claims abstract description 53
- 230000001276 controlling effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 7
- 238000001816 cooling Methods 0.000 description 5
- 238000005057 refrigeration Methods 0.000 description 5
- 239000012535 impurity Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The utility model provides a heat pump defrosting system and a heat pump air conditioner, wherein the heat pump defrosting system comprises a compressor, a first heat exchanger, a four-way valve, a throttle, a second heat exchanger, an electromagnetic two-way valve and an enthalpy increasing component; the outlet of the compressor is connected with the D port of the four-way valve, the E port of the four-way valve is connected with the first heat exchanger, the S port of the four-way valve is connected with the inlet of the compressor, and the C port of the four-way valve is connected with the second heat exchanger; the compressor and the second heat exchanger are both connected with the enthalpy increasing component; the electromagnetic two-way valve and the restrictor are connected in parallel among the first heat exchanger, the electromagnetic two-way valve and the enthalpy increasing component, and the quantity of refrigerant flowing in the first heat exchanger and the second heat exchanger can be regulated by controlling the opening and closing of the electromagnetic two-way valve, so that the problem that the quantity of refrigerant is insufficient in the heat pump defrosting system in a refrigerating mode is avoided. Moreover, the impact on the heat pump defrosting system caused by the fluctuation of the refrigerant quantity caused by opening and closing of the electromagnetic two-way valve can be reduced by adjusting the throttle.
Description
Technical Field
The utility model relates to the technical field of heat pumps, in particular to a heat pump defrosting system and a heat pump air conditioner.
Background
The heat pump air conditioner can heat and refrigerate, and the operating environment temperature range is larger, so that the heat pump defrosting system has high requirements on the adjusting range of the throttling device, and most of heat pump defrosting systems are obviously different in refrigerant flow in the heat pump defrosting system during refrigeration and heating at present, so that the problem of lack of the refrigerant quantity of the heat pump defrosting system during refrigeration is difficult to solve only through a single throttling device; moreover, when the heat pump defrosting system heats, the opening degree of the throttle device is small when the ambient temperature is low, resulting in lower control accuracy of the throttle device.
Disclosure of Invention
Accordingly, an object of the present utility model is to provide a heat pump defrosting system and a heat pump air conditioner, which can avoid the problem of lack of refrigerant amount in the heat pump defrosting system during cooling.
The technical scheme adopted by the utility model comprises the following specific contents:
a heat pump defrosting system comprises a compressor, a first heat exchanger, a four-way valve, a throttle, a second heat exchanger, an electromagnetic two-way valve and an enthalpy increasing component; the outlet of the compressor is connected with the D port of the four-way valve, the E port of the four-way valve is connected with the first heat exchanger, the S port of the four-way valve is connected with the inlet of the compressor, and the C port of the four-way valve is connected with the second heat exchanger; the compressor and the second heat exchanger are both connected with the enthalpy increasing component; the electromagnetic two-way valve and the throttle are connected in parallel between the first heat exchanger and the enthalpy-increasing component.
Further, the heat pump defrosting system further comprises a one-way valve, wherein the one-way valve is connected with the electromagnetic two-way valve in series and then connected with the throttle in parallel between the first heat exchanger and the enthalpy increasing component.
Further, the flow direction of the refrigerant in the one-way valve is the direction of the refrigerant flowing from the electromagnetic two-way valve to the enthalpy-increasing component.
Further, the heat pump defrosting system further comprises a filter, one end of the filter is communicated with the first heat exchanger through a pipeline, and the restrictor and the electromagnetic two-way valve are both communicated with the other end of the filter through a pipeline.
Further, the enthalpy increasing component comprises an economizer connected between the second heat exchanger and the compressor, and the one-way valve is connected with the electromagnetic two-way valve in series and then connected with the restrictor in parallel between the economizer and the first heat exchanger.
Further, the economizer comprises a first connecting port, a second connecting port and a third connecting port, wherein the first connecting port is communicated with the second heat exchanger through a pipeline, the second connecting port is communicated with an enthalpy increasing port of the compressor through a pipeline, and the check valve and the restrictor are communicated with the third connecting port through pipelines.
Further, the economizer further comprises a fourth connecting port, the enthalpy increasing component further comprises an enthalpy increasing expansion valve, one end of the enthalpy increasing 5 expansion valve is communicated with the fourth connecting port through a pipeline, and the other end of the enthalpy increasing expansion valve is communicated with the single port through a pipeline
A conduit between the valve and the restrictor and the third connection port.
Further, the first heat exchanger is a fin heat exchanger, and the second heat exchanger is a plate heat exchanger.
Further, the restrictor is an electronic expansion valve.
The utility model also provides a heat pump air conditioner comprising the heat pump defrosting system.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model discloses a heat pump defrosting system, wherein an electromagnetic two-way valve and a throttle are connected in parallel between a first heat exchanger and an enthalpy-increasing component, and the compressor and a second heat exchanger are both connected with the enthalpy-increasing component, and the opening and closing of the electromagnetic two-way valve are controlled to adjust the opening and closing of the electromagnetic two-way valve so that the heat pump defrosting system can be used in a heating mode and a refrigerating mode
The amount of refrigerant in the first heat exchanger and the second heat exchanger is used for avoiding the problem that the heat pump defrosting system is insufficient in 5 refrigerant amount in a refrigerating mode. Furthermore, by adjusting the throttle, the electromagnetic two-way valve can be reduced
And the impact on the heat pump defrosting system caused by the fluctuation of the refrigerant quantity caused by opening and closing.
For a better understanding and implementation, the present utility model is described in detail below with reference to the drawings.
Drawings
FIG. 1 is a schematic diagram of a heat pump defrosting system according to an embodiment of the utility model in a heating mode;
FIG. 2 is a schematic diagram of a heat pump defrost system in a cooling mode according to an embodiment of the present utility model;
wherein, the reference numerals of each drawing are as follows:
1. a compressor; 2. a four-way valve; 3. a first heat exchanger; 4. a filter; 5. a throttle; 6. an electromagnetic two-way valve; 7. a one-way valve; 8. an economizer; 9. an enthalpy-increasing expansion valve; 10. and a second heat exchanger.
Detailed Description
It should be understood that the described embodiments are only some, but not all, of the embodiments of the utility model.
All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the utility model, are intended to be within the scope of the embodiments of the present utility model.
The terminology used in the embodiments of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model
Examples are given. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.
When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the utility model. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the utility model as detailed in the accompanying claims. In the description of the present utility model, it should be understood that the terms "first," "second," "third," and the like are used merely to distinguish between similar objects and are not necessarily used to describe a particular order or sequence, nor should they be construed to indicate or imply relative importance. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, in the description of the present utility model, unless otherwise indicated, "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.
It is to be understood that the embodiments of the utility model are not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be made without departing from the scope thereof. The scope of embodiments of the utility model is limited only by the appended claims.
The heat pump defrosting system can heat and refrigerate, and the operating environment temperature range is larger, so that the heat pump defrosting system has high requirements on the adjusting range of the throttling device, and at present, most heat pump defrosting systems have obviously different refrigerant flow in the heat pump defrosting system during refrigeration and heating, so that the problem of lack of the refrigerant quantity of the heat pump defrosting system during refrigeration is difficult to solve only through a single throttling device; moreover, when the heat pump defrosting system heats, the opening degree of the throttle device is small when the ambient temperature is low, resulting in lower control accuracy of the throttle device.
To this end, referring to fig. 1 and 2, the present embodiment provides a heat pump defrosting system including a compressor 1, a first heat exchanger 3, a four-way valve 2, a restrictor 5, a second heat exchanger 10, an electromagnetic two-way valve 6, and an enthalpy increasing component; an outlet of the compressor 1 is connected with a D port of the four-way valve 2, an E port of the four-way valve 2 is connected with the first heat exchanger 3, an S port of the four-way valve 2 is connected with an inlet of the compressor 1, and a C port of the four-way valve 2 is connected with the second heat exchanger 10; the compressor 1 and the second heat exchanger 10 are both connected with the enthalpy increasing component; the electromagnetic two-way valve 6 and the restrictor 5 are connected in parallel between the first heat exchanger 3 and the enthalpy increasing component.
Since the electromagnetic two-way valve 6 and the restrictor 5 are connected in parallel between the first heat exchanger 3 and the enthalpy-increasing component, and the compressor 1 and the second heat exchanger 10 are both connected with the enthalpy-increasing component through pipelines, the opening and closing of the enthalpy-increasing component and the electromagnetic two-way valve 6 can adjust the quantity of the refrigerant flowing through the first heat exchanger 3 and the second heat exchanger 10, so as to avoid the problem of insufficient quantity of the refrigerant flowing through the first heat exchanger 3 in the refrigeration mode of the heat pump defrosting system; further, the shock effect on the heat pump defrosting system caused by the fluctuation of the amount of refrigerant when the electromagnetic two-way valve 6 is opened or closed can also be reduced by the throttle 5.
Referring to fig. 1 and 2, the heat pump defrosting system further includes a check valve 7, the check valve 7 is connected in series with the electromagnetic two-way valve 6 and then connected in parallel with the throttle 5 between the first heat exchanger 3 and the enthalpy increasing component, and when the electromagnetic two-way valve 6 fails and cannot be closed, the refrigerant flowing through the electromagnetic two-way valve 6 can flow only in a fixed direction through the check valve 7 due to the fact that the check valve 7 is connected in series with the electromagnetic two-way valve 6, so as to ensure that the amount of the refrigerant flowing through the first heat exchanger 3 and the second heat exchanger 10 of the heat pump defrosting system is different in different operation modes.
In this embodiment, the flow direction of the refrigerant in the check valve 7 is the direction in which the refrigerant flows from the electromagnetic two-way valve 6 to the enthalpy-increasing component, which can ensure that the heat pump defrosting system does not pass the refrigerant in the electromagnetic two-way valve 6 in the heating mode, but only passes the refrigerant in the electromagnetic two-way valve 6 in the cooling mode.
Because the refrigerant flows circularly in the heat pump defrosting system, when the heat pump defrosting system works for a long time, certain impurities are formed in the refrigerant, and the impurities can cause filth blockage of a pipeline of the heat pump defrosting system, in the embodiment, the heat pump defrosting system further comprises a filter 4, one end of the filter 4 is communicated with the first heat exchanger 3 through the pipeline, the throttle 5 and the electromagnetic two-way valve 6 are both communicated with the other end of the filter 4 through the pipeline, and the refrigerant flowing into the first heat exchanger 3 or flowing out of the first heat exchanger 3 can be filtered through the filter 4, so that filth blockage of the pipeline of the heat pump defrosting system caused by the impurities in the refrigerant is avoided.
Referring to fig. 1 and 2, the enthalpy increasing assembly includes an economizer 8 connected between the second heat exchanger 10 and the compressor 1, and the check valve 7 is connected in series with the electromagnetic two-way valve 6 and then in parallel with the restrictor 5 between the economizer 8 and the first heat exchanger 3. In this embodiment, the refrigerant flowing through the economizer 8 may be pre-cooled by the economizer 8 to improve the heat exchange effect of the refrigerant flowing through the first heat exchanger 3 and the second heat exchanger 10.
In this embodiment, the economizer 8 includes a first connection port, a second connection port and a third connection port, the first connection port is communicated with the second heat exchanger 10 through a pipeline, the second connection port is communicated with the enthalpy-increasing port of the compressor 1 through a pipeline, and the check valve 7 and the restrictor 5 are both communicated with the third connection port through a pipeline.
Moreover, the economizer 8 further comprises a fourth connecting port, the enthalpy increasing component further comprises an enthalpy increasing expansion valve 9, one end of the enthalpy increasing expansion valve 9 is communicated with the fourth connecting port through a pipeline, and the other end of the enthalpy increasing expansion valve 9 is communicated with the check valve 7 and a pipeline between the throttle 5 and the third connecting port through a pipeline.
In this embodiment, the first heat exchanger 3 is a fin heat exchanger, the second heat exchanger 10 is a plate heat exchanger, and the restrictor 5 is an electronic expansion valve.
In this embodiment, when the heat pump defrosting system is in the heating mode, referring to fig. 1, the four-way valve 2, the restrictor 5 and the enthalpy-increasing expansion valve 9 are controlled to be opened, the one-way valve 7 and the electromagnetic two-way valve 6 are closed, the compressor 1 generates high-temperature and high-pressure refrigerant gas, and the high-temperature and high-pressure refrigerant gas sequentially flows through the port D and the port C of the four-way valve 2 and then enters the second heat exchanger 10; the high-temperature high-pressure refrigerant gas is cooled by the second heat exchanger 10 and becomes low-temperature liquid refrigerant; the low temperature liquid refrigerant then enters the economizer 8 for further cooling; after the liquid refrigerant further cooled by the economizer 8 flows out of the third connection port, a part of the low-temperature liquid refrigerant is depressurized after being throttled by the enthalpy-increasing expansion valve 9, and then flows back into the economizer 8 through the fourth connection port, the liquid refrigerant flowing back into the economizer 8 is heated in the economizer 8 to become gaseous refrigerant, and then the gaseous refrigerant flows into the compressor 1 through the second connection port and the enthalpy-increasing port; the other part of low-temperature liquid refrigerant flows through the throttle 5, the filter 4, the first heat exchanger 3 and the E port of the four-way valve 2 in sequence and then flows back into the compressor 1 through the inlet of the compressor 1.
In this embodiment, when the heat pump defrosting system is in the cooling mode, referring to fig. 2, the four-way valve 2, the restrictor 5, the enthalpy-increasing expansion valve 9, the one-way valve 7 and the electromagnetic two-way valve 6 are controlled to be opened, and the compressor 1 generates high-temperature and high-pressure refrigerant gas, which sequentially flows through the D port and the E port of the four-way valve 2 and then enters the first heat exchanger 3; the high-temperature high-pressure refrigerant gas is cooled by the first heat exchanger 3 and becomes low-temperature liquid refrigerant; and then, the low-temperature liquid refrigerant flows through the filter 4 and is split, wherein a part of the low-temperature liquid refrigerant flows through the throttle 5, the economizer 8, the second heat exchanger 10 and the C and S ports of the four-way valve 2 in sequence and then flows back into the compressor 1 through the inlet of the compressor 1, and another part of the low-temperature liquid refrigerant flows through the electromagnetic two-way valve 6, the one-way valve 7, the economizer 8, the second heat exchanger 10 and the C and S ports of the four-way valve 2 in sequence and then flows back into the compressor 1 through the inlet of the compressor 1.
The heat pump defrosting system disclosed by the utility model has two working modes, namely a heating mode and a refrigerating mode, and can change the flow of the refrigerant in the first heat exchanger 3 and the second heat exchanger 10 of the heat pump defrosting system in different working modes by arranging the electromagnetic two-way valve 6 and the throttle 5 in parallel so as to avoid the problem of insufficient refrigerant quantity when the single throttle 5 is used in the refrigerating mode of the heat pump defrosting system; and the impact on the heat pump defrosting system caused by the change of the refrigerant quantity when the electromagnetic two-way valve 6 is opened and closed can be reduced by adjusting the opening degree of the throttle 5, so that the stability of the heat pump defrosting system in operation is improved.
Moreover, since the heat pump defrosting system further includes the check valve 7 connected in series with the electromagnetic two-way valve 6, the flow direction of the refrigerant in the electromagnetic two-way valve 6 is defined by the check valve 7, and when the electromagnetic two-way valve 6 fails and cannot be closed, the refrigerant flowing through the electromagnetic two-way valve 6 can flow only in a fixed direction by the check valve 7, so as to ensure that the amount of the refrigerant flowing through the first heat exchanger 3 and the second heat exchanger 10 is different in different operation modes of the heat pump defrosting system.
When the heat pump defrosting system works, whether the heat pump defrosting system enters a defrosting state is judged, when the heat pump defrosting system enters the defrosting state, the electromagnetic two-way valve 6 is opened, the throttle 5 is opened to the maximum step number, the enthalpy-increasing expansion valve 9 is closed to 0 step, the electromagnetic two-way valve 6 is closed until the heat pump defrosting system exits the defrosting state, and the throttle 5 and the enthalpy-increasing expansion valve 9 recover to the initial opening.
When the heat pump defrost system is not entering a defrost state: (1) When the opening degree of the throttle 5=the maximum opening degree of the throttle 5 and the superheat degree of the return air is larger than the target superheat degree of the return air +t1, and the duration is larger than or equal to T1, the electromagnetic two-way valve 6 is opened, the throttle 5 is closed by P1 steps, and the enthalpy-increasing expansion valve 9 is opened by P2 steps; (2) If the opening of the throttle 5 is smaller than or equal to the minimum opening of the throttle 5, the superheat degree of the return air is smaller than the target superheat degree of the return air-T2 ℃, the duration is larger than or equal to T2, the electromagnetic two-way valve 6 is closed, meanwhile, the throttle 5 is opened for P3 steps, and the enthalpy-increasing expansion valve 9 is closed for P4 steps.
In the embodiment, the value range of t1 and t2 is 1-5 ℃; the value range of T1 and T2 is 1-5 min; and the values of P1, P2, P3 and P4 are 50-300 steps.
Based on the heat pump defrosting system provided in the embodiment, the embodiment also provides a heat pump air conditioner, which comprises the heat pump defrosting system provided by the utility model.
The foregoing examples have shown only the preferred embodiments of the utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the spirit of the utility model, and the utility model is intended to encompass such modifications and improvements.
Claims (10)
1. A heat pump defrost system, characterized by: the system comprises a compressor, a first heat exchanger, a four-way valve, a throttle, a second heat exchanger, an electromagnetic two-way valve and an enthalpy increasing component; the outlet of the compressor is connected with the D port of the four-way valve, the E port of the four-way valve is connected with the first heat exchanger, the S port of the four-way valve is connected with the inlet of the compressor, and the C port of the four-way valve is connected with the second heat exchanger; the compressor and the second heat exchanger are both connected with the enthalpy increasing component; the electromagnetic two-way valve and the throttle are connected in parallel between the first heat exchanger and the enthalpy-increasing component.
2. The heat pump defrost system according to claim 1, wherein: the heat pump defrosting system further comprises a one-way valve, wherein the one-way valve is connected with the electromagnetic two-way valve in series and then connected with the restrictor in parallel between the first heat exchanger and the enthalpy-increasing component.
3. The heat pump defrost system according to claim 2, wherein: the flow direction of the refrigerant in the one-way valve is the direction of the refrigerant flowing from the electromagnetic two-way valve to the enthalpy-increasing component.
4. A heat pump defrost system as claimed in claim 3, wherein: the heat pump defrosting system further comprises a filter, one end of the filter is communicated with the first heat exchanger through a pipeline, and the restrictor and the electromagnetic two-way valve are both communicated with the other end of the filter through a pipeline.
5. The heat pump defrost system according to any one of claims 2-4, wherein: the enthalpy increasing component comprises an economizer connected between the second heat exchanger and the compressor, and the one-way valve is connected in series with the electromagnetic two-way valve and then connected in parallel with the restrictor between the economizer and the first heat exchanger.
6. The heat pump defrost system according to claim 5, wherein: the economizer comprises a first connecting port, a second connecting port and a third connecting port, wherein the first connecting port is communicated with the second heat exchanger through a pipeline, the second connecting port is communicated with an enthalpy-increasing port of the compressor through a pipeline, and the check valve and the restrictor are communicated with the third connecting port through pipelines.
7. The heat pump defrost system according to claim 6, wherein: the economizer further comprises a fourth connecting port, the enthalpy increasing component further comprises an enthalpy increasing expansion valve, one end of the enthalpy increasing expansion valve is communicated with the fourth connecting port through a pipeline, and the other end of the enthalpy increasing expansion valve is communicated with the one-way valve and a pipeline between the restrictor and the third connecting port through a pipeline.
8. The heat pump defrost system according to claim 6, wherein: the first heat exchanger is a fin heat exchanger, and the second heat exchanger is a plate heat exchanger.
9. The heat pump defrost system according to any one of claims 6-8, wherein: the restrictor is an electronic expansion valve.
10. A heat pump air conditioner, characterized in that: a heat pump defrost system comprising any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223554258.5U CN219656381U (en) | 2022-12-28 | 2022-12-28 | Heat pump defrosting system and heat pump air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223554258.5U CN219656381U (en) | 2022-12-28 | 2022-12-28 | Heat pump defrosting system and heat pump air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219656381U true CN219656381U (en) | 2023-09-08 |
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ID=87857115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223554258.5U Active CN219656381U (en) | 2022-12-28 | 2022-12-28 | Heat pump defrosting system and heat pump air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219656381U (en) |
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2022
- 2022-12-28 CN CN202223554258.5U patent/CN219656381U/en active Active
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