CN220489448U - Cold and hot dual-purpose heat pump unit using air heat energy for defrosting - Google Patents
Cold and hot dual-purpose heat pump unit using air heat energy for defrosting Download PDFInfo
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- CN220489448U CN220489448U CN202322157883.4U CN202322157883U CN220489448U CN 220489448 U CN220489448 U CN 220489448U CN 202322157883 U CN202322157883 U CN 202322157883U CN 220489448 U CN220489448 U CN 220489448U
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- heat exchanger
- air heat
- defrosting
- compressor
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- 238000010257 thawing Methods 0.000 title claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000010438 heat treatment Methods 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims description 26
- 238000001816 cooling Methods 0.000 claims description 14
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 239000003507 refrigerant Substances 0.000 description 34
- 238000010586 diagram Methods 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The utility model relates to the field of air source heat pumps, in particular to a cold and hot dual-purpose heat pump unit for defrosting by using air heat energy, which comprises a compressor, a water heat exchanger and at least two air heat exchangers, wherein a first end of the water heat exchanger is provided with a three-way reversing valve I, a first end of the air heat exchanger is provided with a three-way reversing valve II, and the other two interfaces of the three-way reversing valve I and the three-way reversing valve II are respectively communicated with an inlet end and an outlet end of the compressor; the second end of the air heat exchanger is provided with a first passage and a second passage, the first passage is communicated with the water heat exchanger, the second passage is respectively communicated with the air heat exchanger and the water heat exchanger, and the first passage and the second passage are both provided with throttling and depressurization equipment. The cold and hot dual-purpose heat pump unit using air heat energy for defrosting can realize independent control of switching refrigerating and heating functions of each group of heat exchangers at any time, solve the problem of temperature fluctuation caused by heat absorption from a user side in the traditional defrosting mode, and can realize multiple functions of refrigerating, heating, defrosting and the like.
Description
Technical Field
The utility model relates to the field of air source heat pumps, in particular to a cold and hot dual-purpose heat pump unit for defrosting by using air heat energy.
Background
The problem of frosting of the air source heat pump unit seriously affects popularization and application, and the heating capacity of the unit is seriously attenuated and the energy efficiency is reduced after frosting, so that the unit has to be defrosted.
At present, two commonly adopted defrosting modes are hot gas bypass defrosting and reverse circulation defrosting, the hot gas bypass defrosting time is long, the compressor runs under high load during defrosting, a certain impact is generated on the compressor, the defrosting effect is influenced by various factors, and the defrosting is often unstable; the reverse circulation defrosting speed is low, the indoor temperature is rapidly reduced due to the fact that heat is required to be extracted from a room, the comfort of the indoor environment is reduced, the high-low pressure butt joint process can generate serious impact on all parts of the system, and the reliability of the system is affected. On the other hand, the refrigerating capacity of the air source heat pump unit is also important, the heating in low-temperature environment in winter and the refrigerating condition in summer are greatly changed, and the requirement on the reliability of the unit is high.
Disclosure of Invention
The utility model aims at: aiming at the problems existing in the prior art, the cold and hot dual-purpose heat pump unit using air heat energy to defrost is provided, and refrigeration, heating and defrosting during heating can be realized.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the utility model provides an use cold and hot dual-purpose heat pump unit of air heat energy defrosting, includes compressor, water heat exchanger, air heat exchanger, the compressor, the air heat exchanger is connected respectively in the both ends of water heat exchanger, the quantity of air heat exchanger is two at least, water heat exchanger's first end is provided with three-way reversing valve one, three-way reversing valve one's other two interfaces communicate respectively the entrance point and the exit point of compressor, every air heat exchanger's first end is provided with three-way reversing valve two, three-way reversing valve two's other interfaces communicate respectively the entrance point and the exit point of compressor; the second end of every air heat exchanger is provided with first passageway and second passageway, first passageway with the second passageway is provided with the check valve that the direction of conduction is opposite, first passageway intercommunication water heat exchanger, first passageway is provided with electronic expansion valve, the second passageway includes branch road one and branch road two, branch road one communicates all air heat exchanger, branch road one is provided with the solenoid valve, branch road two communicates water heat exchanger, branch road two is provided with electronic expansion valve.
As a preferred embodiment of the present utility model, an economizer is provided between the water heat exchanger and the air heat exchanger.
As a preferable scheme of the utility model, the outlet end of the economizer is provided with a branch which is communicated with the channel at the other side of the economizer, the branch is provided with an electronic expansion valve, and the high-pressure liquid refrigerant in the branch absorbs heat and evaporates in the economizer after being throttled and depressurized, so that the heat absorbing capacity of the main-path refrigerant is improved.
As a preferable scheme of the utility model, the branch is communicated with the compressor after passing through the economizer, and the refrigerant in the branch is supplemented into the compressor, so that the total amount of the refrigerant in the compressor is ensured to be unchanged.
As a preferable scheme of the utility model, the second shunt is connected with the water heat exchanger after passing through the economizer, and the refrigerant is supercooled through the economizer, so that the refrigerating energy efficiency of the unit is improved.
As a preferable scheme of the utility model, the second shunt is provided with a one-way valve, so that the smoothness of the second shunt is ensured.
As a preferable scheme of the utility model, a liquid accumulator is arranged between the economizer and the water heat exchanger and is used for storing redundant liquid refrigerant in a heating mode, so that the normal operation of the system under different working conditions is ensured.
As a preferred embodiment of the present utility model, the second passage of one of the air heat exchangers communicates with the first passages of all the air heat exchangers.
As a preferable mode of the present utility model, the compressor further comprises an oil separator provided at an outlet end of the compressor.
As a preferable mode of the utility model, the utility model further comprises a gas-liquid separator, wherein the gas-liquid separator is arranged at the inlet end of the compressor.
In summary, due to the adoption of the technical scheme, the beneficial effects of the utility model are as follows:
1. according to the utility model, a group of three-way reversing valves are arranged for each group of air heat exchangers, so that independent control of the refrigerating and heating functions of each group of heat exchangers can be realized at any time, and meanwhile, the refrigerating, heating and defrosting of the unit can be realized at the same time as the heating of the unit due to the arrangement of the three-way reversing valves for the unit water supply heat exchangers.
2. In the preferred scheme, the utility model can throttle and decompress a part of high-pressure liquid refrigerant by arranging the economizer, thereby absorbing heat in the main path refrigerant and improving refrigerating and heating energy efficiency of the unit.
3. In the preferred scheme, the liquid storage device can balance different requirements of liquid refrigerant in a heating mode and a refrigerating mode by arranging the liquid storage device, so that stable and normal operation of the system can be ensured.
Drawings
Fig. 1 is a schematic system diagram of a dual-purpose heat pump unit for heating and cooling using air heat energy for defrosting according to the present utility model.
Fig. 2 is a schematic diagram of the dual-purpose heat pump unit for heating and cooling using air heat energy for defrosting in a normal heating mode according to the present utility model.
Fig. 3 is a schematic diagram of the dual-purpose heat pump unit for heating and cooling using air heat energy for defrosting in the defrosting mode according to the present utility model.
Fig. 4 is a schematic diagram of a dual-purpose heat pump unit for cooling and heating using air heat energy for defrosting in a cooling mode according to the present utility model.
The marks in the figure: 1-compressor, 21-three-way reversing valve one, 22-three-way reversing valve two, 3-water heat exchanger, 4-reservoir, 51-first check valve, 52-second check valve, 53-third check valve, 54-fourth check valve, 55-fifth check valve, 6-economizer, 71-first electronic expansion valve, 72-second electronic expansion valve, 8-solenoid valve, 91-first air heat exchanger, 92-second air heat exchanger, 93-third air heat exchanger, 94-fourth air heat exchanger, 95-fifth air heat exchanger, 96-sixth air heat exchanger.
Detailed Description
The present utility model will be described in detail with reference to the accompanying drawings.
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Examples
As shown in FIG. 1, the cold and hot dual-purpose heat pump unit for defrosting by using air heat energy comprises a compressor 1, a water heat exchanger 3 and first to sixth air heat exchangers 91 to 96, wherein the number of the air heat exchangers can be adjusted according to actual use needs, and the number of the air heat exchangers is only more than or equal to two.
The air heat exchangers 91-96 and the compressor 1 are respectively positioned at two ends of the water heat exchanger 3, the air heat exchangers 91-96 are connected in parallel and then connected with the compressor 1 and the water heat exchanger 3 in series, a first end, communicated with the compressor 1, of the water heat exchanger 3 is provided with a three-way reversing valve I21, the three-way reversing valve I21 is provided with three interfaces, namely an interface D, an interface E and an interface S, the interface E is communicated with the water heat exchanger 3 through a pipeline, the interface D is communicated with an outlet end of the compressor 1 through a pipeline, and the interface S is communicated with an inlet end of the compressor 1 through a pipeline.
The first ends of the air heat exchangers 91-96 are respectively provided with a three-way reversing valve 22, the three-way reversing valves 22 are also provided with three interfaces, namely an interface D, an interface E and an interface S, wherein the interface E is communicated with the air heat exchangers 91-96 through pipelines, the interface D is communicated with the outlet end of the compressor 1 through the pipelines, and the interface S is communicated with the inlet end of the compressor 1 through the pipelines.
Further, the interfaces D of all the three-way reversing valves II 22 are connected in parallel through pipelines and then connected with the outlet end of the compressor 1, and the interfaces S of all the three-way reversing valves II 22 are connected in parallel through pipelines and then connected with the inlet end of the compressor 1.
The second ends of the air heat exchangers 91-96 are provided with a first check valve 51 and a second check valve 52 with opposite conduction directions, wherein the first check valve 51 limits fluid to flow into the air heat exchangers 91-96 only, and the second check valve 52 limits fluid to flow out of the air heat exchangers 91-96 only; the air heat exchanger and the first one-way valve 51 form a first passage, and the first passage is connected with the second electronic expansion valve 72 and then is connected with the interface b of the economizer 6; the air heat exchangers and the second check valve 52 form a second passage, the second passage comprises a first branch and a second branch, the first branch is connected to the first passages of all the air heat exchangers 91-96 through the electromagnetic valve 8, and the second branch is connected with the interface a of the economizer 6.
Further, in order to facilitate connection between the pipelines, the pipelines of the first passages of all the air heat exchangers 91 to 96 are connected in parallel and then connected with the second electronic expansion valve 72; the pipelines of the second passages of all the air heat exchangers 91-96 are connected in parallel and then are divided into a first branch and a second branch, wherein the first branch is connected into a parallel main passage of the first passage through the electromagnetic valve 8, and the second branch is connected with an interface a of the economizer 6.
The economizer 6 comprises two channels, which can be defined as a hot side channel having an interface a and an interface b, and a cold side channel having an interface m and an interface n; the pipeline connected with the interface b of the hot side channel branches off, and the branch is connected with the interface m of the cold side channel after being connected with the first electronic expansion valve 71, and the interface n of the cold side channel is connected with the inlet end of the compressor 1 through the pipeline.
The connection a and the connection b of the economizer 6 are also connected with the liquid reservoir 4, wherein the pipeline connected with the connection b can be connected with the liquid reservoir 4 after passing through the second electronic expansion valve 72, and the liquid reservoir 4 is communicated with the water heat exchanger 3 through the pipeline.
Further, in order to prevent the reverse flow of the refrigerant in the line, the third check valve 53 and the fifth check valve 55 are provided in the line connecting the accumulator 4 and the economizer 6, and the fourth check valve 54 is provided in the second branch of the second path of the air heat exchangers 91 to 96.
As shown in fig. 2, the principle of normal heating in winter:
in the cold and hot dual-purpose heat pump unit using air heat energy for defrosting, under the normal heat supply working condition in winter, the interface D and the interface E of the first three-way reversing valve 21 are communicated, the interfaces S and the interfaces E of all the second three-way reversing valves 22 are communicated, and the electromagnetic valve 8 is closed. The high-temperature high-pressure refrigerant gas discharged by the compressor 1 enters the water heat exchanger 3 through the three-way reversing valve I21 to be condensed and released, high-temperature hot water is prepared for a user, after the refrigerant is released and condensed by the water heat exchanger 3, the refrigerant flows through the liquid storage device 4 and the third one-way valve 53 and then enters the economizer 6 to be supercooled, and a small part of liquid refrigerant from the outlet of the economizer 6 is throttled and depressurized by the first electronic expansion valve 71 to be evaporated and absorbed, and finally returns to the inlet end of the compressor 1; most of the refrigerant at the outlet of the economizer 6 flows through the second electronic expansion valve 72 to be throttled and depressurized, the throttled and depressurized liquid refrigerant is equally divided into 6 parts, the 6 parts enter the first to sixth air heat exchangers 91 to 96 through the first check valve 51 respectively to absorb heat through evaporation, and the refrigerant after absorbing heat enters the compressor 1 again through the three-way reversing valve II 22, so that the refrigerant is circulated continuously.
As shown in fig. 3, the principle of defrosting operation of the air heat exchanger:
a cold and hot dual-purpose heat pump unit using air heat energy for defrosting is extremely easy to frost when operating in a low-temperature high-humidity environment in winter, influences the normal operation of the unit and needs to defrost. In the defrosting operation example of the first air heat exchanger 91, the interface D and the interface E of the three-way reversing valve I21 are communicated, the interface D and the interface E of the three-way reversing valve II 22 at one end of the first air heat exchanger 91 are communicated, the interfaces S and the interfaces E of the three-way reversing valves II 22 at one ends of the second to sixth air heat exchangers 92 to 96 are communicated, and the electromagnetic valve 8 is opened. The high-temperature high-pressure refrigerant gas discharged by the compressor 1 is divided into two paths, one path enters the water heat exchanger 3 through the three-way reversing valve I21 to be condensed and released, high-temperature hot water is prepared for a user, after the refrigerant is released and condensed by the water heat exchanger 3, the refrigerant flows through the liquid storage device 4 and the third one-way valve 53 and then enters the economizer 6 to be supercooled, a small part of liquid refrigerant from the outlet of the economizer 6 is throttled and depressurized by the first electronic expansion valve 71 and then evaporated and absorbed, and finally returns to the inlet end of the compressor 1, and most of refrigerant from the outlet of the economizer 6 flows through the second electronic expansion valve 72 to be throttled and depressurized; the other path enters the frosted first air heat exchanger 91 through a three-way reversing valve II 22 at one end of the first air heat exchanger 91, and the high-temperature gaseous refrigerant is condensed into a liquid state after releasing heat and defrosting and enters the electromagnetic valve 8 through a second one-way valve 52 for throttling and reducing pressure. The two paths of low-pressure refrigerants after throttling and depressurization are converged and then are equally divided into 5 parts, the 5 parts enter the second to sixth air heat exchangers 92 to 96 through the first one-way valve 51 respectively for evaporation and heat absorption, and the refrigerant after heat absorption enters the compressor 1 again through the three-way reversing valve II 22, so that the refrigerant is continuously circulated; the second through sixth air heat exchangers 92 through 96 operate on a similar principle during defrost operation.
As shown in fig. 4, the principle of the summer refrigeration condition is as follows:
in the cold and hot dual-purpose heat pump unit using air heat energy for defrosting, in the refrigerating working condition in summer, the interface S and the interface E of the first three-way reversing valve 21 are communicated, the interface D and the interface E of the second three-way reversing valve 22 are communicated, and the electromagnetic valve 8 is closed. The high-temperature high-pressure refrigerant gas discharged by the compressor 1 is uniformly divided into 6 parts, the 6 parts enter first to sixth air heat exchangers 91 to 96 through a three-way reversing valve II 22 to be condensed and released, the condensed liquid refrigerant flows through a fourth one-way valve 54 and then enters the economizer 6 to be supercooled, and a small part of liquid refrigerant from the outlet of the economizer 6 is decompressed through a first electronic expansion valve 71 and evaporated to absorb heat, and finally returns to the inlet end of the compressor 1; most of the refrigerant at the outlet of the economizer 6 flows through the second electronic expansion valve 72 to be throttled and depressurized, the throttled and depressurized liquid refrigerant enters the water heat exchanger 3 to be evaporated and absorbed by heat through the fifth one-way valve 55 and the liquid accumulator 4, air-conditioning chilled water is provided for a user, and the refrigerant enters the compressor 1 again through the three-way reversing valve 21 after being evaporated and absorbed by heat, so that the refrigerant is circulated continuously.
Of course, in order to improve the performance of the unit and increase the low-temperature heating capacity of the unit, auxiliary components such as an oil separator, a gas-liquid separator and the like can be added, wherein the gas-liquid separator is connected in series with the inlet end of the compressor 1, and the oil separator is connected in series with the outlet end of the compressor 1.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. The utility model provides an use cold and hot dual-purpose heat pump unit of air heat energy defrosting, its characterized in that includes compressor (1), water heat exchanger (3), air heat exchanger, compressor (1) air heat exchanger connect respectively in the both ends of water heat exchanger (3), the quantity of air heat exchanger is two at least, the first end of water heat exchanger (3) is provided with tee bend switching-over valve one (21), the other two interfaces of tee bend switching-over valve one (21) communicate respectively the entrance point and the exit point of compressor (1), every air heat exchanger's first end is provided with tee bend switching-over valve two (22), the other two interfaces of tee bend switching-over valve two (22) communicate respectively the entrance point and the exit point of compressor (1); the second end of every air heat exchanger is provided with first passageway and second passageway, first passageway with the second passageway is provided with the check valve that the direction of conduction is opposite, first passageway intercommunication water heat exchanger (3), first passageway is provided with electronic expansion valve, the second passageway includes branch road one and branch road two, branch road one communicates all air heat exchanger, branch road one is provided with solenoid valve (8), branch road two communicates water heat exchanger (3), branch road two is provided with electronic expansion valve.
2. A dual-purpose heat pump unit for heating and cooling by using air heat energy for defrosting according to claim 1, wherein an economizer (6) is arranged between the water heat exchanger (3) and the air heat exchanger.
3. A dual-purpose heat pump unit for heating and cooling by using air heat energy for defrosting according to claim 2, wherein a branch is arranged at the outlet end of the economizer (6), the branch is communicated with the other side channel of the economizer, and the branch is provided with an electronic expansion valve.
4. A dual-purpose heat pump unit for heating and cooling by using air heat energy for defrosting according to claim 3, wherein said branch is connected with said compressor (1) after passing through said economizer (6).
5. A dual-purpose heat pump unit for heating and cooling by using air heat energy for defrosting according to claim 2, wherein the second shunt is connected to the water heat exchanger (3) after passing through the economizer (6).
6. The dual-purpose heat pump assembly for heating and cooling by using air heat energy for defrosting as recited in claim 5, wherein the second branch is provided with a check valve.
7. A dual-purpose heat pump unit for heating and cooling by using air heat energy for defrosting according to claim 2, wherein a liquid reservoir (4) is arranged between the economizer (6) and the water heat exchanger (3).
8. A dual-purpose heat pump assembly for heating and cooling by defrosting air by thermal energy according to any one of claims 1-7, wherein the second passage of one of said air heat exchangers is connected to the first passage of all of said air heat exchangers.
9. A dual-purpose heat pump unit for heating and cooling by defrosting using air heat energy according to claim 8, further comprising an oil separator provided at an outlet end of the compressor (1).
10. A dual-purpose heat pump unit for heating and cooling by using air heat energy for defrosting according to claim 8, further comprising a gas-liquid separator provided at an inlet end of the compressor (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322157883.4U CN220489448U (en) | 2023-08-10 | 2023-08-10 | Cold and hot dual-purpose heat pump unit using air heat energy for defrosting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322157883.4U CN220489448U (en) | 2023-08-10 | 2023-08-10 | Cold and hot dual-purpose heat pump unit using air heat energy for defrosting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220489448U true CN220489448U (en) | 2024-02-13 |
Family
ID=89831135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322157883.4U Active CN220489448U (en) | 2023-08-10 | 2023-08-10 | Cold and hot dual-purpose heat pump unit using air heat energy for defrosting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220489448U (en) |
-
2023
- 2023-08-10 CN CN202322157883.4U patent/CN220489448U/en active Active
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