CN218915445U - Air source heat pump unit with supercooling alternate defrosting function - Google Patents
Air source heat pump unit with supercooling alternate defrosting function Download PDFInfo
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- CN218915445U CN218915445U CN202120464011.0U CN202120464011U CN218915445U CN 218915445 U CN218915445 U CN 218915445U CN 202120464011 U CN202120464011 U CN 202120464011U CN 218915445 U CN218915445 U CN 218915445U
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Abstract
The utility model belongs to the technical field of heat pump units, and particularly relates to an air source heat pump unit capable of alternately defrosting by supercooling. The technical proposal is as follows: the air source heat pump unit comprises a compression pipeline, wherein the compression pipeline forms a loop, a compression assembly, a first heat exchanger and an outdoor heat exchanger unit are sequentially arranged on the compression pipeline, the outdoor heat exchanger unit comprises a second heat exchanger and a third heat exchanger, and the second heat exchanger and the third heat exchanger are connected in parallel on the compression pipeline. According to the utility model, through the arrangement of the outdoor double heat exchangers and the control valve for controlling the passage of the outdoor double heat exchangers, the unit can continuously supply heat to the indoor space in the defrosting process, so that the efficient operation of the unit is maintained, and a series of problems caused by the existing defrosting technology are avoided.
Description
Technical Field
The utility model belongs to the technical field of heat pump units, and particularly relates to an air source heat pump unit capable of alternately defrosting by supercooling.
Background
The air source heat pump is an important device for clean heating in China, and the policy of 'changing coal into electricity' in the north and the large carbon neutralization background lead the market prospect of the air source heat pump to be huge. When the surface temperature of the evaporator of the heat pump is lower than the dew point temperature of air in winter by a heating worker Kuang Yun, the surface of the fins can be gradually frosted, and the air channels among the fins are blocked along with the thickening of the frost layer, so that the air quantity is reduced, the heat exchange efficiency of the heat exchanger is deteriorated, the COP of the system is reduced, and the energy consumption is greatly increased. How to defrost efficiently is a critical issue in heat pump technology applications. The current common defrosting modes mainly comprise electric heating defrosting, reverse circulation defrosting, hot gas bypass defrosting, energy storage defrosting, ultrasonic defrosting and the like. The electric defrosting has high power consumption, and only about 15% of energy is used for defrosting; the reverse circulation defrosting needs to absorb heat from the user side, so that the indoor comfort is affected; the hot gas bypass defrosting time is longer; although the energy storage defrosting can shorten the defrosting time, the heating quantity of the system is reduced during frosting, and heat cannot be supplied at the same time during defrosting. The drawbacks of the above defrost mode present a great challenge to the application of heat pump technology.
Disclosure of Invention
In order to solve the above problems of the prior art, the present utility model is directed to an alternate defrosting air source heat pump unit capable of supplying heat to a room without interruption during defrosting.
The technical scheme adopted by the utility model is as follows:
the air source heat pump unit comprises a compression pipeline, wherein the compression pipeline forms a loop, a compression assembly, a first heat exchanger and an outdoor heat exchanger unit are sequentially arranged on the compression pipeline, the outdoor heat exchanger unit comprises a second heat exchanger and a third heat exchanger, and the second heat exchanger and the third heat exchanger are connected in parallel on the compression pipeline; the inlet pipeline of the third heat exchanger is connected with a first three-way valve, the outlet pipeline of the third heat exchanger is connected with a second three-way valve, the inlet pipeline of the second heat exchanger is connected with a third three-way valve, the outlet pipeline of the second heat exchanger is connected with a fourth three-way valve, and the outlet pipeline of the first heat exchanger is respectively connected with a fifth three-way valve and a sixth three-way valve; the first branch pipe is connected between the fourth three-way valve and the fifth three-way valve, the second branch pipe is connected to the third three-way valve, the other end of the second branch pipe is connected to a pipeline between the fifth three-way valve and the sixth three-way valve, the third branch pipe is connected between the second three-way valve and the sixth three-way valve, the fourth branch pipe is connected to the first three-way valve, and the other end of the fourth branch pipe is connected to a pipeline on one side, far away from the fifth three-way valve, of the sixth three-way valve.
Through adjusting the three-way valves, the compressor sucks low-pressure low-temperature refrigerant gas generated in one outdoor heat exchanger under the non-defrosting working condition, the refrigerant is changed into high-temperature high-pressure gas through adiabatic compression, the high-temperature high-pressure gas enters the first heat exchanger, the refrigerant is cooled in the first heat exchanger, and at the moment, the first heat exchanger is a condenser and releases heat indoors; after the refrigerant enters the outdoor heat exchanger under the defrosting working condition for further heat release and defrosting, the refrigerant enters an expansion valve for throttling and depressurization, and the refrigerant is in a low-temperature and low-pressure state; after the refrigerant with low temperature and low pressure enters the outdoor heat exchanger with non-defrosting working condition to absorb heat, the refrigerant enters the compressor again through the four-way valve, and is switched to a normal heating working condition after the defrosting working condition is completed. According to the utility model, through the arrangement of the outdoor double heat exchangers and the control valve for controlling the passage of the outdoor double heat exchangers, the unit can continuously supply heat to the indoor space in the defrosting process, so that the efficient operation of the unit is maintained, and a series of problems caused by the existing defrosting technology are avoided.
As a preferable scheme of the utility model, the compression pipe is also connected with an expansion valve, and the expansion valve is positioned between the first heat exchanger and the outdoor heat exchanger unit. The expansion valve can play a role in throttling and reducing pressure, so that the refrigerant is in a low-temperature and low-pressure state, and the refrigerant can enter the compressor again after heat exchange in the heat exchanger.
As a preferable scheme of the utility model, the compression assembly comprises a four-way valve, two ports of the four-way valve are connected to compression pipelines, a circulating pipeline is connected between the other two ports of the four-way valve, and a compressor is connected to the circulating pipeline. The compressor is connected in the circulation pipeline, so that the compressor can circularly compress the gas to change the refrigerant into high-temperature high-pressure gas, and therefore the high-temperature high-pressure gas can exchange heat in the first heat exchanger, and the first heat exchanger releases heat indoors.
As a preferable scheme of the utility model, the first heat exchanger, the second heat exchanger and the third heat exchanger are all provided with heat exchange plates.
As a preferred embodiment of the present utility model, the first heat exchanger is installed indoors.
As a preferred embodiment of the present utility model, the second heat exchanger and the third heat exchanger are installed outdoors.
The beneficial effects of the utility model are as follows:
through adjusting the three-way valves, the compressor sucks low-pressure low-temperature refrigerant gas generated in one outdoor heat exchanger under the non-defrosting working condition, the refrigerant is changed into high-temperature high-pressure gas through adiabatic compression, the high-temperature high-pressure gas enters the first heat exchanger, the refrigerant is cooled in the first heat exchanger, and at the moment, the first heat exchanger is a condenser and releases heat indoors; after the refrigerant enters the outdoor heat exchanger under the defrosting working condition for further heat release and defrosting, the refrigerant enters an expansion valve for throttling and depressurization, and the refrigerant is in a low-temperature and low-pressure state; after the refrigerant with low temperature and low pressure enters the outdoor heat exchanger with non-defrosting working condition to absorb heat, the refrigerant enters the compressor again through the four-way valve, and is switched to a normal heating working condition after the defrosting working condition is completed. According to the utility model, through the arrangement of the outdoor double heat exchangers and the control valve for controlling the passage of the outdoor double heat exchangers, the unit can continuously supply heat to the indoor space in the defrosting process, so that the efficient operation of the unit is maintained, and a series of problems caused by the existing defrosting technology are avoided.
Drawings
FIG. 1 is a schematic view of the structure of the present utility model in normal heating conditions;
FIG. 2 is a schematic view of the present utility model in a defrost mode of a second heat exchanger;
FIG. 3 is a schematic view of the present utility model in a third heat exchanger defrost mode;
fig. 4 is a schematic diagram of the structure of the present utility model in a summer cooling mode.
In the figure, a 1-compression pipeline; 2-a first heat exchanger; 3-a second heat exchanger; 4-a third heat exchanger; a 5-expansion valve; 6-a four-way valve; 7-a compressor; 11-a first branch pipe; 12-a second branch pipe; 13-a third branch; 14-a fourth branch pipe; a1-a first three-way valve; a2-a second three-way valve; a3-a third three-way valve; a4-a fourth three-way valve; a5-a fifth three-way valve; a 6-a sixth three-way valve.
Detailed Description
Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.
As shown in fig. 1, the air source heat pump unit for supercooling alternating defrosting in this embodiment includes a compression pipeline 1, the compression pipeline 1 forms a loop, a compression assembly, a first heat exchanger 2 and an outdoor heat exchanger unit are sequentially arranged on the compression pipeline 1, the outdoor heat exchanger unit includes a second heat exchanger 3 and a third heat exchanger 4, and the second heat exchanger 3 and the third heat exchanger 4 are connected in parallel on the compression pipeline 1; the inlet pipeline of the third heat exchanger 4 is connected with a first three-way valve a1, the outlet pipeline of the third heat exchanger 4 is connected with a second three-way valve a2, the inlet pipeline of the second heat exchanger 3 is connected with a third three-way valve a3, the outlet pipeline of the second heat exchanger 3 is connected with a fourth three-way valve a4, and the outlet pipeline of the first heat exchanger 2 is respectively connected with a fifth three-way valve a5 and a sixth three-way valve a6; the first branch pipe 11 is connected between the fourth three-way valve a4 and the fifth three-way valve a5, the second branch pipe 12 is connected to the third three-way valve a3, the other end of the second branch pipe 12 is connected to a pipeline between the fifth three-way valve a5 and the sixth three-way valve a6, the third branch pipe 13 is connected between the second three-way valve a2 and the sixth three-way valve a6, the fourth branch pipe 14 is connected to the first three-way valve a1, and the other end of the fourth branch pipe 14 is connected to a pipeline on one side, far away from the fifth three-way valve a5, of the sixth three-way valve a 6.
Through adjusting each three-way valve, the compressor 7 sucks low-pressure low-temperature refrigerant gas generated in one outdoor heat exchanger under the non-defrosting working condition, the refrigerant is changed into high-temperature high-pressure gas through adiabatic compression, the high-temperature high-pressure gas enters the first heat exchanger 2, the refrigerant is cooled in the first heat exchanger 2, and at the moment, the first heat exchanger 2 is a condenser and releases heat indoors; after the refrigerant enters the outdoor heat exchanger under the defrosting working condition again and is subjected to further heat release defrosting, the refrigerant enters the expansion valve 5 to be throttled and depressurized, and the refrigerant is in a low-temperature and low-pressure state; after the refrigerant with low temperature and low pressure enters the outdoor heat exchanger with non-defrosting working condition to absorb heat, the refrigerant enters the compressor 7 again through the four-way valve 6, and is switched to the normal heating working condition after the defrosting working condition is completed. According to the utility model, through the arrangement of the outdoor double heat exchangers and the control valve for controlling the passage of the outdoor double heat exchangers, the unit can continuously supply heat to the indoor space in the defrosting process, so that the efficient operation of the unit is maintained, and a series of problems caused by the existing defrosting technology are avoided.
The compression pipeline 1 is also connected with an expansion valve 5, and the expansion valve 5 is positioned between the first heat exchanger 2 and the outdoor heat exchanger unit. The expansion valve 5 can play a role in throttling and depressurization, so that the refrigerant is in a low-temperature and low-pressure state, and the refrigerant can enter the compressor 7 again after heat exchange in the heat exchanger.
Specifically, the compression assembly comprises a four-way valve 6, two ports of the four-way valve 6 are connected to the compression pipeline 1, a circulation pipeline is connected between the other two ports of the four-way valve 6, and a compressor 7 is connected to the circulation pipeline. The compressor 7 is connected to the circulation line, so that the compressor 7 can circularly compress the gas to change the refrigerant into high-temperature and high-pressure gas, and thus the high-temperature and high-pressure gas can exchange heat in the first heat exchanger 2, and the first heat exchanger 2 releases heat indoors.
The first heat exchanger 2, the second heat exchanger 3 and the third heat exchanger 4 are all provided with heat exchange plates, and then the first heat exchanger 2, the second heat exchanger 3 and the third heat exchanger 4 can exchange heat with outside air. The first heat exchanger 2 is installed indoors. The second heat exchanger 3 and the third heat exchanger 4 are installed outdoors.
The utility model relates to an operation control method of an air source heat pump unit,
as shown in fig. 1, the winter normal heating condition:
the first three-way valve a1, the second three-way valve a2, the third three-way valve a3, the fourth three-way valve a4, the fifth three-way valve a5 and the sixth three-way valve a6 are regulated to disconnect the first branch pipe 11, the second branch pipe 12, the third branch pipe 13 and the fourth branch pipe 14 from the compression pipeline 1; the compressor 7 sucks low-pressure low-temperature refrigerant gas generated in the second heat exchanger 3 and the third heat exchanger 4, the refrigerant is changed into high-temperature high-pressure gas through adiabatic compression, the high-temperature high-pressure gas enters the first heat exchanger 2, the refrigerant is cooled in the first heat exchanger 2, and at the moment, the first heat exchanger 2 is a condenser and releases heat indoors; after the refrigerant is subjected to heat release and condensation in the first heat exchanger 2, the refrigerant enters the expansion valve 5 to be throttled and depressurized, and the refrigerant is in a low-temperature and low-pressure state; part of the low-temperature low-pressure refrigerant enters the second heat exchanger 3 to absorb heat from the outdoor air, and the other part enters the third heat exchanger 4 to absorb heat from the outdoor air and then enters the compressor 7 again after being converged, so that the refrigerant is continuously circulated;
as shown in fig. 2, the second heat exchanger 3 is defrosted in winter:
the first three-way valve a1, the second three-way valve a2, the third three-way valve a3, the fourth three-way valve a4, the fifth three-way valve a5 and the sixth three-way valve a6 are regulated to enable the first branch pipe 11 and the second branch pipe 12 to be connected with the compression pipeline 1, and enable the third branch pipe 13 and the fourth branch pipe 14 to be disconnected with the compression pipeline 1; the compressor 7 sucks low-pressure low-temperature refrigerant gas generated in the third heat exchanger 4, the refrigerant is changed into high-temperature high-pressure gas through adiabatic compression, the high-temperature high-pressure gas enters the first heat exchanger 2, the refrigerant is cooled in the first heat exchanger 2, and at the moment, the first heat exchanger 2 is a condenser and releases heat indoors; after the refrigerant enters the second heat exchanger 3 for further heat release and defrosting, the refrigerant enters the expansion valve 5 for throttling and depressurization, and the refrigerant is in a low-temperature and low-pressure state; the low-temperature low-pressure refrigerant enters the third heat exchanger 4 to absorb heat, then enters the compressor 7 again through the four-way valve 6, and is switched to a normal heat supply working condition after the defrosting working condition is completed;
as shown in fig. 3, the third heat exchanger 4 is defrosted in winter:
the first three-way valve a1, the second three-way valve a2, the third three-way valve a3, the fourth three-way valve a4, the fifth three-way valve a5 and the sixth three-way valve a6 are regulated to disconnect the first branch pipe 11 and the second branch pipe 12 from the compression pipeline 1, and connect the third branch pipe 13 and the fourth branch pipe 14 from the compression pipeline 1; the compressor 7 sucks low-pressure low-temperature refrigerant gas generated in the third heat exchanger 4, the refrigerant is changed into high-temperature high-pressure gas through adiabatic compression, the high-temperature high-pressure gas enters the first heat exchanger 2, the refrigerant is cooled in the first heat exchanger 2, and at the moment, the first heat exchanger 2 is a condenser and releases heat indoors; after the refrigerant enters the third heat exchanger 4 for further heat release and defrosting, the refrigerant enters the expansion valve 5 for throttling and depressurization, and the refrigerant is in a low-temperature and low-pressure state; the refrigerant with low temperature and low pressure enters the second heat exchanger 3 to absorb heat, then enters the compressor 7 again through the four-way valve 6, and is switched to a normal heat supply working condition after the defrosting working condition is completed;
as shown in fig. 4, the summer refrigeration condition:
the first three-way valve a1, the second three-way valve a2, the third three-way valve a3, the fourth three-way valve a4, the fifth three-way valve a5 and the sixth three-way valve a6 are regulated to disconnect the first branch pipe 11, the second branch pipe 12, the third branch pipe 13 and the fourth branch pipe 14 from the compression pipeline 1; through the change control of the four-way valve 6, the compressor 7 sucks the low-pressure low-temperature refrigerant gas generated in the first heat exchanger 2, after adiabatic compression, the temperature and pressure of the refrigerant are increased, one part of the high-temperature high-pressure refrigerant enters the second heat exchanger 3 to release heat and cool outdoors, the other part of the high-temperature high-pressure refrigerant enters the third heat exchanger 4 to release heat and cool outdoors, the temperature of the refrigerant is reduced after the heat release condensation is completed, the refrigerant enters the expansion valve 5 to be throttled and depressurized after being converged, and the temperature is reduced while the pressure is reduced, so that the low-temperature low-pressure refrigerant is obtained; the low-temperature low-pressure refrigerant enters the first heat exchanger 2 to absorb indoor heat and then enters the compressor 7 again, and the refrigerant is continuously circulated.
The utility model is not limited to the above-described alternative embodiments, and any person who may derive other various forms of products in the light of the present utility model, however, any changes in shape or structure thereof, all falling within the technical solutions defined in the scope of the claims of the present utility model, fall within the scope of protection of the present utility model.
Claims (6)
1. The air source heat pump unit is characterized by comprising a compression pipeline (1), wherein the compression pipeline (1) forms a loop, a compression assembly, a first heat exchanger (2) and an outdoor heat exchanger unit are sequentially arranged on the compression pipeline (1), the outdoor heat exchanger unit comprises a second heat exchanger (3) and a third heat exchanger (4), and the second heat exchanger (3) and the third heat exchanger (4) are connected in parallel on the compression pipeline (1); the inlet pipeline of the third heat exchanger (4) is connected with a first three-way valve (a 1), the outlet pipeline of the third heat exchanger (4) is connected with a second three-way valve (a 2), the inlet pipeline of the second heat exchanger (3) is connected with a third three-way valve (a 3), the outlet pipeline of the second heat exchanger (3) is connected with a fourth three-way valve (a 4), and the outlet pipeline of the first heat exchanger (2) is respectively connected with a fifth three-way valve (a 5) and a sixth three-way valve (a 6); the novel three-way valve is characterized in that a first branch pipe (11) is connected between the fourth three-way valve (a 4) and the fifth three-way valve (a 5), a second branch pipe (12) is connected to the third three-way valve (a 3), the other end of the second branch pipe (12) is connected to a pipeline between the fifth three-way valve (a 5) and the sixth three-way valve (a 6), a third branch pipe (13) is connected between the second three-way valve (a 2) and the sixth three-way valve (a 6), a fourth branch pipe (14) is connected to the first three-way valve (a 1), and the other end of the fourth branch pipe (14) is connected to a pipeline, far away from one side of the fifth three-way valve (a 5), of the sixth three-way valve (a 6).
2. An air source heat pump unit for supercooling alternating defrosting according to claim 1, wherein the compression pipeline (1) is further connected with an expansion valve (5), and the expansion valve (5) is positioned between the first heat exchanger (2) and the outdoor heat exchanger unit.
3. An air source heat pump unit for supercooling alternate defrosting according to claim 1, wherein the compression assembly comprises a four-way valve (6), two ports of the four-way valve (6) are connected to the compression pipeline (1), a circulation pipeline is connected between the other two ports of the four-way valve (6), and a compressor (7) is connected to the circulation pipeline.
4. An air source heat pump unit for supercooling alternating defrosting according to claim 1, wherein the first heat exchanger (2), the second heat exchanger (3) and the third heat exchanger (4) are each provided with heat exchanging fins.
5. An air source heat pump unit for supercooling alternating defrosting according to claim 1, wherein the first heat exchanger (2) is installed indoors.
6. An air source heat pump unit for supercooling alternating defrosting according to claim 1, wherein the second heat exchanger (3) and the third heat exchanger (4) are installed outdoors.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120464011.0U CN218915445U (en) | 2021-03-04 | 2021-03-04 | Air source heat pump unit with supercooling alternate defrosting function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120464011.0U CN218915445U (en) | 2021-03-04 | 2021-03-04 | Air source heat pump unit with supercooling alternate defrosting function |
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| CN218915445U true CN218915445U (en) | 2023-04-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112781269A (en) * | 2021-03-04 | 2021-05-11 | 成都绿建工程技术有限公司 | Air source heat pump unit with supercooling alternative defrosting function and operation control method thereof |
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2021
- 2021-03-04 CN CN202120464011.0U patent/CN218915445U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112781269A (en) * | 2021-03-04 | 2021-05-11 | 成都绿建工程技术有限公司 | Air source heat pump unit with supercooling alternative defrosting function and operation control method thereof |
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