CN212132635U

CN212132635U - Double-compressor type air source heat pump

Info

Publication number: CN212132635U
Application number: CN202020760384.8U
Authority: CN
Inventors: 谢继红; 秦彦沛; 陈东
Original assignee: Tianjin University of Science and Technology
Current assignee: Tianjin University of Science and Technology
Priority date: 2020-05-11
Filing date: 2020-05-11
Publication date: 2020-12-11
Anticipated expiration: 2030-05-11

Abstract

The utility model relates to a two compressor type air source heat pumps. The system comprises a condenser B (1), fins C (2), a condenser A (3), a compressor A (4), a compressor B (5), an evaporator A (6), fins D (7), an evaporator B (8), an expansion valve B (9) and an expansion valve A (10); the compressor A (4), the condenser A (3), the expansion valve A (10) and the evaporator A (6) are sequentially connected through a pipeline to form a heat pump working medium circulation loop, and high-temperature working medium is filled in the loop; the compressor B (5), the condenser B (1), the expansion valve B (9) and the evaporator B (8) are sequentially connected through a pipeline to form a heat pump working medium circulation loop, and low-temperature working medium is filled in the loop; the condenser A (3) and the condenser B (1) are connected into a whole through a fin C (2), and the evaporator A (6) and the evaporator B (8) are connected into a whole through a fin D (7). The utility model discloses can improve the adaptability of heat pump to ambient temperature.

Description

Double-compressor type air source heat pump

Technical Field

The utility model relates to a heat pump for building heating, in particular to two compressor type air source heat pumps.

Background

When the air source heat pump is used for building heating, the air source heat pump has the characteristics of low energy consumption, simplicity and convenience in installation and the like; when the ambient air temperature of the conventional air source heat pump is large in variation range, particularly when the outdoor ambient air temperature is low in winter, the heating capacity of the air source heat pump is remarkably reduced, the requirement of a building heating load is difficult to meet, and the wide application of the air source heat pump is restricted.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, an object of the present invention is to provide a dual-compressor type air source heat pump capable of improving the adaptability of the heat pump to the ambient temperature.

The structure principle of the utility model is schematically shown in the attached figure 1. The system comprises a condenser B (1), fins C (2), a condenser A (3), a compressor A (4), a compressor B (5), an evaporator A (6), fins D (7), an evaporator B (8), an expansion valve B (9) and an expansion valve A (10); the compressor A (4), the condenser A (3), the expansion valve A (10) and the evaporator A (6) are sequentially connected through a pipeline to form a heat pump working medium circulation loop, and high-temperature working medium is filled in the loop; the compressor B (5), the condenser B (1), the expansion valve B (9) and the evaporator B (8) are sequentially connected through a pipeline to form a heat pump working medium circulation loop, and low-temperature working medium is filled in the loop; the condenser A (3) and the condenser B (1) are connected into a whole through a fin C (2), and the evaporator A (6) and the evaporator B (8) are connected into a whole through a fin D (7).

The fin C (2) is made of copper or aluminum.

The number of the fins C (2) is two or more.

The fin D (7) is made of copper or aluminum.

The number of the fins D (7) is two or more.

The utility model has the advantages that: the adaptability of the heat pump to the ambient temperature can be improved.

Drawings

FIG. 1 is a schematic diagram of the structure principle of the present invention;

in the figure:

1 is condenser B2 is fin C3 is condenser A4 is compressor A

5 is compressor B6, evaporator A7, fin D8 and evaporator B

9 is an expansion valve B10 is an expansion valve A

Detailed Description

As shown in the attached drawing 1, the utility model relates to a double-compressor type air source heat pump, which comprises a condenser B (1), a fin C (2), a condenser A (3), a compressor A (4), a compressor B (5), an evaporator A (6), a fin D (7), an evaporator B (8), an expansion valve B (9) and an expansion valve A (10); the compressor A (4), the condenser A (3), the expansion valve A (10) and the evaporator A (6) are sequentially connected through a pipeline to form a heat pump working medium circulation loop, and high-temperature working medium is filled in the loop; the compressor B (5), the condenser B (1), the expansion valve B (9) and the evaporator B (8) are sequentially connected through a pipeline to form a heat pump working medium circulation loop, and low-temperature working medium is filled in the loop; the condenser A (3) and the condenser B (1) are connected into a whole through a fin C (2), and the evaporator A (6) and the evaporator B (8) are connected into a whole through a fin D (7); the fin C (2) is made of copper or aluminum; the number of the fins C (2) is two or more; the fin D (7) is made of copper or aluminum; the number of the fins D (7) is two or more.

When a building needs heating and the ambient air temperature is high, the compressor A (4) is started, and a high-temperature working medium runs in a heat pump working medium circulation loop formed by sequentially connecting the compressor A (4), the condenser A (3), the expansion valve A (10) and the evaporator A (6) through pipelines; the low-pressure liquid working medium in the evaporator A (6) is vaporized, absorbs the heat energy in the ambient air outside the evaporator A (6), and turns into a vapor state to enter the compressor A (4); after the temperature and the pressure are raised by a compressor A (4), the gas is changed into high-temperature and high-pressure gas and enters a condenser A (3); condensing the high-temperature high-pressure gas in a condenser A (3) to release heat for heating a building; the working medium is changed into a high-pressure liquid state when exiting the condenser A (3), enters the expansion valve A (10), is throttled, cooled and depressurized by the expansion valve A (10) to generate a low-pressure liquid working medium, and enters the evaporator A (6) to start the next cycle.

When the ambient air temperature is reduced so that the heat emitted by the condenser A (3) cannot meet the building heating requirement, the compressor B (5) is started; the low-temperature working medium runs in a heat pump working medium circulation loop formed by sequentially connecting a compressor B (5), a condenser B (1), an expansion valve B (9) and an evaporator B (8) through pipelines; the low-temperature working medium liquid in the evaporator B (8) absorbs the heat energy in the ambient air through the evaporator B (8) to be vaporized, and the low-temperature working medium still has higher steam density at lower ambient air temperature, so that the mass flow of the low-temperature working medium steam sucked by the compressor B (5) is larger; after being heated and pressurized by the compressor B (5), the heat released by the condensation entering the condenser B (1) to the building is also large; the liquid working medium out of the condenser B (1) is cooled and depressurized by an expansion valve B (9) to generate low-temperature working medium liquid, and then the low-temperature working medium liquid enters an evaporator B (8) to start the next cycle.

The condenser A (3) and the condenser B (1) are connected into a whole through the fin C (2), the evaporator A (6) and the evaporator B (8) are connected into a whole through the fin D (7), when the compressor A (4) operates and the compressor B (5) does not operate, the effective heat exchange area of the condenser A (3) and the evaporator A (6) can be increased, and the heating quantity and the heating coefficient of a high-temperature working medium circulation loop can be improved.

When the temperature of the ambient air is higher, the heat emitted by the condenser A (3) in the high-temperature working medium circulation loop can meet the building heating requirement; when the ambient air temperature is low and the high-temperature working medium circulation loop cannot meet the building heating requirement, the compressor B (5) can be started, the low-temperature working medium circulation loop has strong low-temperature heating capacity and meets the building heating requirement together with the high-temperature working medium circulation loop, and therefore the whole device has good adaptability to ambient air temperature changes.

Although an embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be used to limit the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A double-compressor type air source heat pump is characterized by comprising a condenser B (1), fins C (2), a condenser A (3), a compressor A (4), a compressor B (5), an evaporator A (6), fins D (7), an evaporator B (8), an expansion valve B (9) and an expansion valve A (10); the compressor A (4), the condenser A (3), the expansion valve A (10) and the evaporator A (6) are sequentially connected through a pipeline to form a heat pump working medium circulation loop, and high-temperature working medium is filled in the loop; the compressor B (5), the condenser B (1), the expansion valve B (9) and the evaporator B (8) are sequentially connected through a pipeline to form a heat pump working medium circulation loop, and low-temperature working medium is filled in the loop; the condenser A (3) and the condenser B (1) are connected into a whole through a fin C (2), and the evaporator A (6) and the evaporator B (8) are connected into a whole through a fin D (7).

2. The dual-compressor type air source heat pump according to claim 1, wherein the material of the fin C (2) is copper or aluminum.

3. The dual-compressor type air source heat pump according to claim 1, characterized in that the number of the fins C (2) is two or more.

4. The dual-compressor type air source heat pump according to claim 1, wherein the material of the fin D (7) is copper or aluminum.

5. The dual-compressor type air source heat pump according to claim 1, wherein the number of the fins D (7) is two or more.