CN207280003U - Ultra-low temperature air source heat pump - Google Patents
Ultra-low temperature air source heat pump Download PDFInfo
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- CN207280003U CN207280003U CN201721044661.XU CN201721044661U CN207280003U CN 207280003 U CN207280003 U CN 207280003U CN 201721044661 U CN201721044661 U CN 201721044661U CN 207280003 U CN207280003 U CN 207280003U
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Abstract
The utility model discloses a kind of ultra-low temperature air source heat pump, exhaust outlet of compressor is sequentially connected shell and tube exchanger by refrigerant pipe, high pressure fluid reservoir, main expansion valve, finned heat exchanger, gas-liquid separator, gas-liquid separator outlet passes through refrigerant pipeline connect compressor air entry, wherein, the cooling water inlet of shell and tube exchanger, hot water outlet is connected with hot-water heating system, economizer is additionally provided with refrigerant pipe between high pressure fluid reservoir and main expansion valve, economizer sets major loop and subsidiary loop, major loop import is connected with high pressure fluid reservoir, major loop outlet is connected with main expansion valve, the expanded valve of subsidiary loop import, solenoid valve is connected with high pressure fluid reservoir, subsidiary loop outlet is connected with the gas supplementing opening of compressor, wherein the control of subsidiary loop is controlled by control system for heat pump according to temperature.The utility model can increase the circulating mass of refrigerant under low evaporating temperature, control delivery temperature, compressor is in high energy efficiency ratio operation interval all the time, improve compressor Energy Efficiency Ratio and service life.
Description
Technical field
The utility model belongs to technical field of heat pumps, and in particular to a kind of ultra-low temperature air source heat pump.
Background technology
At present, air source heat pump has been obtained for extensive use in many areas in China, in southern area winter outdoor temp
Degree is generally not less than subzero 5 DEG C, and indoor calorific requirement is little, and air source heat pump work is good, and efficiency is high.In northern area winter room
Outer temperature is very low, for air source heat pump currently on the market, the heating capacity of system with the decline of outdoor environment temperature and
Rapid to decline, when outdoor temperature is very low, the heating capacity of system can not even meet heating demand, cause system not transport normally
Turn.
In addition, the decline of winter outdoor temperature can also decline compressor efficiency, and when outside air temperature declines, evaporating temperature
With evaporating pressure with reduction, and condensing pressure change is little, necessarily causes compressor pressure ratios to increase, heating efficiency drops significantly
It is low, while the increase of compression ratio can be such that compressor exhaust temperature constantly raises, compressor power consumption increase, efficiency reduces, long-term high
Delivery temperature also results in compressor damage, seriously affects the service life of compressor.
In order to overcome the problems referred above, engineers and technicians generally solve low temperature ring by the way of install electrical auxiliary heater additional
The problem of heating capacity is insufficient under border.This mode does not solve outdoor low temperature fundamentally and compressor efficiency and service life is asked
Topic.
Utility model content
The utility model technical issues that need to address be to provide one kind can be worked normally under ultra-low temperature surroundings, heating efficiency it is high
Ultra-low temperature air source heat pump.
To solve the above problems, the utility model is adopted the technical scheme that：
A kind of ultra-low temperature air source heat pump, including compressor, shell and tube exchanger, high pressure fluid reservoir, main expansion valve, fin
Heat exchanger, gas-liquid separator, exhaust outlet of compressor are sequentially connected shell and tube exchanger, high pressure fluid reservoir, master by refrigerant pipe
Expansion valve, finned heat exchanger, gas-liquid separator, gas-liquid separator outlet pass through refrigerant pipeline connect compressor air entry, wherein,
Cooling water inlet, hot water outlet and the hot-water heating system of shell and tube exchanger connect, cold between high pressure fluid reservoir and main expansion valve
Economizer is additionally provided with matchmaker's pipeline, economizer sets major loop and subsidiary loop, major loop import to be connected with high pressure fluid reservoir, main
Circuit outlet is connected with main expansion valve, and the expanded valve of subsidiary loop import, solenoid valve are connected with high pressure fluid reservoir, and subsidiary loop goes out
Mouth is connected with the gas supplementing opening of compressor, and the wherein control of subsidiary loop is controlled by control system for heat pump according to temperature.
Preferably, the expansion valve is the electric expansion valve that cold medium flux is adjusted by stepper motor.
Further, the control system for heat pump include be arranged at finned heat exchanger inlet side environment temperature sensor,
The temperature sensor of economizer inlet and outlet side is arranged at, when the environment temperature of environment temperature sensor detection is less than setting value,
Solenoid valve is opened, and subsidiary loop connection, the difference that expansion valve imports and exports side temperature according to economizer carries out flow-rate adjustment, with cooling
Main refrigerant circuit temperature；Otherwise solenoid valve is closed.
Preferably, the economizer uses plate type regenerator.
Further, the D mouths connection pressure of heating refrigeration conversion four-way valve, wherein four-way valve is additionally provided with exhaust outlet of compressor
Contracting machine exhaust outlet, the outlet of the E mouth connection finned heat exchangers of four-way valve, the S mouth connection gas-liquid separator imports of four-way valve, four-way
The C mouth connection shell and tube exchanger imports of valve, when heat pump is heating mode, the D mouths of four-way valve are connected with C mouthfuls, E mouthfuls and S mouthfuls
Connection, when heat pump is refrigeration mode, the D mouths of four-way valve are connected with E mouthfuls, and C mouthfuls connect with S mouthfuls.
It is using beneficial effect caused by above-mentioned technical proposal：
The utility model installs the subsidiary loop of economizer additional expansion valve and solenoid valve comes pair by increasing economizer
The refrigerant of major loop is subcooled, while the refrigerant of subsidiary loop enters compressor gas supplementing opening, increases refrigerant mass fluxes, control
Delivery temperature processed, improves compressor Energy Efficiency Ratio and service life.Expansion valve realizes section using electric expansion valve instead of capillary
Stream, saves space, and easy to quantitative control, subsidiary loop increase solenoid valve is used for the open and close controlling of subsidiary loop, works as environment temperature
When higher, subsidiary loop is closed, system can work normally, and when the temperature of the surroundings is low, open subsidiary loop, compressor is begun
High energy efficiency ratio operation interval is in eventually, extends compressor service life.According to the actual requirements, the utility model also passes through four-way valve
To change refrigerant flow direction, heating refrigeration switching is realized.
Brief description of the drawings
Fig. 1 is the utility model heat pump system flow diagram；
Wherein：1. compressor, 2. four-way valves, 3. shell and tube exchangers, 4. high pressure fluid reservoirs, 5. economizers, 6. main expansions
Valve, 7. finned heat exchangers, 8. gas-liquid separators, 9. expansion valves, 10. solenoid valves.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings：
The utility model is a kind of ultra-low temperature air source heat pump, can be operated in northern area, and has high energy efficiency ratio, system
Heat is high, does not influence compressor service life.
As shown in Figure 1, the utility model include compressor 1, shell and tube exchanger 3, high pressure fluid reservoir 4, main expansion valve 6,
Finned heat exchanger 7, gas-liquid separator 8, wherein exhaust outlet of compressor are sequentially connected shell and tube exchanger 3, height by refrigerant pipe
Fluid reservoir 4, main expansion valve 6, finned heat exchanger 7, gas-liquid separator 8 are pressed, gas-liquid separator outlet is connected by refrigerant pipeline presses
Contracting machine air entry, wherein, cooling water inlet, hot water outlet, shell and tube exchanger 3 and hot-water heating system are set on shell and tube exchanger 3
Connection heat exchange.
In order to ensure this heat pump system when environment temperature is relatively low, compressor can work normally, and be operated in high energy efficiency
Than operation interval, economizer 5 is set, for being carried out to refrigerant in the refrigerant pipe between high pressure fluid reservoir and main expansion valve
It is cold and give compressor tonifying Qi, compressor mass flow is improved, the economizer 5 of the utility model sets major loop and subsidiary loop, main
Circuit inlet is connected with high pressure fluid reservoir 4, and major loop outlet is connected with main expansion valve 6, and subsidiary loop is used for main refrigerant circuit
It is subcooled, its working method is：When environment temperature is less than setting value, subsidiary loop is opened, and otherwise subsidiary loop, which is in, closes
Closed state, to ensure the Energy Efficiency Ratio of compressor.Therefore, the utility model sets solenoid valve 10 and expansion valve 9 in subsidiary loop,
The expanded valve of subsidiary loop import, solenoid valve are connected with high pressure fluid reservoir, and subsidiary loop outlet is connected with the gas supplementing opening of compressor,
The opening and closing of solenoid valve, the adjusting of expansion valve carry out real-time by control system for heat pump according to the temperature of detection wherein in subsidiary loop
Tracing control.
In order to guarantee that subsidiary loop is reasonably controlled, ensure that the temperature of main refrigerant circuit is in rational shape
State, above-mentioned expansion valve 9 are the electric expansion valve that cold medium flux is adjusted by stepper motor, real by the control system for heat pump of the utility model
When tracking adjust.
The control system for heat pump of the utility model includes being arranged at the environment temperature sensor of finned heat exchanger inlet side, sets
The temperature sensor of economizer inlet and outlet side is placed in, when the environment temperature of environment temperature sensor detection is less than setting value, electricity
Magnet valve is opened, and subsidiary loop connection, the difference that expansion valve imports and exports side temperature according to economizer carries out flow-rate adjustment, to cool down master
Circuit refrigerant temperature；Otherwise solenoid valve is closed.
To ensure the heat transfer effect of economizer（Refrigerant is subcooled in subsidiary loop）, the economizer uses plate type regenerator.
, can also be into when summer in order to meet the market requirement, the utility model heat pump is not only able to heat in the winter time
Row refrigeration, therefore, the D mouth connect compressors of heating refrigeration conversion four-way valve 2, wherein four-way valve is additionally provided with exhaust outlet of compressor
Exhaust outlet, the outlet of the E mouth connection finned heat exchangers of four-way valve, the S mouth connection gas-liquid separator imports of four-way valve, four-way valve
C mouthfuls of connection shell and tube exchanger imports, when heat pump is heating mode, the D mouths of four-way valve are connected with C mouthfuls, and E mouthfuls connect with S mouthfuls,
When heat pump is refrigeration mode, the D mouths of four-way valve are connected with E mouthfuls, and C mouthfuls connect with S mouthfuls.
Claims (5)
1. a kind of ultra-low temperature air source heat pump, including compressor（1）, shell and tube exchanger（3）, high pressure fluid reservoir（4）, main expansion
Valve（6）, finned heat exchanger（7）, gas-liquid separator（8）, exhaust outlet of compressor by refrigerant pipe be sequentially connected shell-tube type exchange heat
Device（3）, high pressure fluid reservoir（4）, main expansion valve（6）, finned heat exchanger（7）, gas-liquid separator（8）, gas-liquid separator（8）Outlet
By refrigerant pipeline connect compressor air entry, wherein, shell and tube exchanger（3）Cooling water inlet, hot water outlet and hot water system
System connection, it is characterised in that：In high pressure fluid reservoir（4）And main expansion valve（6）Between refrigerant pipe in be additionally provided with economizer
（5）, economizer (5) sets major loop and subsidiary loop, major loop import and high pressure fluid reservoir（4）Be connected, major loop outlet with
Main expansion valve（6）It is connected, the expanded valve of subsidiary loop import（9）, solenoid valve（10）With high pressure fluid reservoir（4）It is connected, aids in back
Way outlet and compressor（1）Gas supplementing opening be connected, the wherein control of subsidiary loop is controlled by control system for heat pump according to temperature
System.
2. ultra-low temperature air source heat pump according to claim 1, it is characterised in that：The expansion valve（9）For by stepping electricity
Machine adjusts the electric expansion valve of cold medium flux.
3. ultra-low temperature air source heat pump according to claim 2, it is characterised in that：The control system for heat pump includes setting
In finned heat exchanger（7）The environment temperature sensor of inlet side, be arranged at economizer（5）The temperature sensor of side is imported and exported, when
When the environment temperature of environment temperature sensor detection is less than setting value, solenoid valve（10）Open, subsidiary loop connection, expansion valve
（9）According to economizer（5）The difference for importing and exporting side temperature carries out flow-rate adjustment, to cool down main refrigerant circuit temperature；Otherwise electromagnetism
Valve（10）Close.
4. according to claim 1-3 any one of them ultra-low temperature air source heat pumps, it is characterised in that：The economizer (5) is adopted
Use plate type regenerator.
5. ultra-low temperature air source heat pump according to claim 4, it is characterised in that：Heating is additionally provided with exhaust outlet of compressor
Refrigeration conversion four-way valve（2）, wherein D mouth connect compressor exhaust outlets of four-way valve, the E mouth connection finned heat exchangers of four-way valve
（7）Outlet, the S mouth connection gas-liquid separators of four-way valve（8）Import, the C mouth connection shell and tube exchangers of four-way valve（3）Into
Mouthful, when heat pump is heating mode, the D mouths of four-way valve are connected with C mouthfuls, and E mouthfuls connect with S mouthfuls, when heat pump is refrigeration mode, four
The D mouths of port valve are connected with E mouthfuls, and C mouthfuls connect with S mouthfuls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721044661.XU CN207280003U (en) | 2017-08-21 | 2017-08-21 | Ultra-low temperature air source heat pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721044661.XU CN207280003U (en) | 2017-08-21 | 2017-08-21 | Ultra-low temperature air source heat pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207280003U true CN207280003U (en) | 2018-04-27 |
Family
ID=61983506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721044661.XU Active CN207280003U (en) | 2017-08-21 | 2017-08-21 | Ultra-low temperature air source heat pump |
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| CN (1) | CN207280003U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109028640A (en) * | 2018-07-03 | 2018-12-18 | 浙江国祥股份有限公司 | A kind of air source heat pump and its flow control technique |
| CN112236633A (en) * | 2018-06-13 | 2021-01-15 | 三菱电机株式会社 | Refrigeration cycle device |
| CN113483385A (en) * | 2021-07-02 | 2021-10-08 | 青岛海信日立空调系统有限公司 | Air source heat pump unit |
| CN113669856A (en) * | 2020-05-13 | 2021-11-19 | 广东美的制冷设备有限公司 | Air conditioner sterilization method, air conditioner and computer readable storage medium |
| CN114151878A (en) * | 2021-12-08 | 2022-03-08 | 广东日出东方空气能有限公司 | High-environment-temperature air source swimming pool unit |
| CN115339357A (en) * | 2022-08-26 | 2022-11-15 | 上海理工大学 | Battery thermal management and low-voltage air supply type heat pump air conditioner and control method thereof |
| CN116255749A (en) * | 2023-05-12 | 2023-06-13 | 广东美的暖通设备有限公司 | Temperature control unit, temperature control method, temperature control device and controller |
-
2017
- 2017-08-21 CN CN201721044661.XU patent/CN207280003U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112236633A (en) * | 2018-06-13 | 2021-01-15 | 三菱电机株式会社 | Refrigeration cycle device |
| CN112236633B (en) * | 2018-06-13 | 2021-10-29 | 三菱电机株式会社 | Refrigeration cycle device |
| CN109028640A (en) * | 2018-07-03 | 2018-12-18 | 浙江国祥股份有限公司 | A kind of air source heat pump and its flow control technique |
| CN113669856A (en) * | 2020-05-13 | 2021-11-19 | 广东美的制冷设备有限公司 | Air conditioner sterilization method, air conditioner and computer readable storage medium |
| CN113669856B (en) * | 2020-05-13 | 2022-09-16 | 广东美的制冷设备有限公司 | Air conditioner sterilization method, air conditioner and computer readable storage medium |
| CN113483385A (en) * | 2021-07-02 | 2021-10-08 | 青岛海信日立空调系统有限公司 | Air source heat pump unit |
| CN114151878A (en) * | 2021-12-08 | 2022-03-08 | 广东日出东方空气能有限公司 | High-environment-temperature air source swimming pool unit |
| CN115339357A (en) * | 2022-08-26 | 2022-11-15 | 上海理工大学 | Battery thermal management and low-voltage air supply type heat pump air conditioner and control method thereof |
| CN116255749A (en) * | 2023-05-12 | 2023-06-13 | 广东美的暖通设备有限公司 | Temperature control unit, temperature control method, temperature control device and controller |
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