CN203396155U - Ultralow-temperature air source heat pump - Google Patents

Ultralow-temperature air source heat pump Download PDF

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Publication number
CN203396155U
CN203396155U CN201320346203.7U CN201320346203U CN203396155U CN 203396155 U CN203396155 U CN 203396155U CN 201320346203 U CN201320346203 U CN 201320346203U CN 203396155 U CN203396155 U CN 203396155U
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valve
compressor
economizer
heat exchanger
expansion valve
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CN201320346203.7U
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王超毅
刘杨
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Guangdong PHNIX Eco Energy Solution Ltd
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Guangdong PHNIX Eco Energy Solution Ltd
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Abstract

The utility model discloses an ultralow-temperature air source heat pump, which is used for the technical field of heat pumps. The ultralow-temperature air source heat pump comprises a refrigerant pipeline loop which is connected with a compressor, a four-way valve, a first heat exchanger, an economizer, a thermal expansion valve and a second heat exchanger in sequence, wherein a first port of the four-way valve is communicated with a high-pressure outlet of the compressor, a second port of the four-way valve is communicated with the first heat exchanger, a third port of the four-way valve is communicated with a low-pressure inlet of the compressor, and a fourth port of the four-way valve is communicated with the second heat exchanger; the pipeline between the economizer and the thermal expansion valve is connected with an enthalpy gain branch which is connected in series with an electronic expansion valve; the enthalpy gain branch is connected in series with the electronic expansion valve and the economizer in sequence and then is communicated with an air supply port of the compressor. The enthalpy gain branch of the ultralow-temperature air source heat pump is led out from the pipeline between the economizer and the thermal expansion valve, so that the degree of super-cooling on the super-cooling side of the economizer is fully utilized, favorable conditions are provided for liquid supply of the enthalpy gain branch, the system can take liquid normally under severe working conditions, the reliability of the compressor is improved and the service life of the entire machine is prolonged.

Description

A kind of ultra-low temperature air source heat pump
Technical field
The utility model, for technical field of heat pumps, particularly relates to a kind of ultra-low temperature air source heat pump.
Background technology
Existing ultra-low temperature air source heat pump generally comprises compressor, cross valve, First Heat Exchanger, economizer, electric expansion valve, electromagnetism two-port valve, heating power expansion valve and the second heat exchanger, the high-pressure outlet of compressor is connected with the first interface of cross valve, the second interface of cross valve is connected with First Heat Exchanger, the 4th interface of cross valve is connected with the second heat exchanger, the 3rd interface of cross valve is connected with the low-pressure inlet of compressor, wherein, between First Heat Exchanger and economizer, be provided with and increase enthalpy branch road, be that to get liquid point be after First Heat Exchanger outlet for the increasing enthalpy of existing ultra-low temperature air source heat pump system, when unit is started shooting and heated after constant temperature is shut down, pressure balance or uneven start heat, the high water temperature operating mode of ultra-low-loop temperature, in the time of the bad working environments operations such as system coolant leakage, after First Heat Exchanger outlet, getting liquid system occurs possibly getting less than liquid or can only get liquid seldom, thereby cause system to occur without degree of supercooling or the too small situation of degree of supercooling, will directly have influence on the delivery temperature of system like this, excessive discharge temperature, compressor will be easy to be damaged, shortened the service life of complete machine.
Utility model content
For addressing the above problem, the utility model provide a kind of can under bad working environments, meet increase enthalpy branch road get smoothly liquid, avoid excessive discharge temperature, improve compressor operating reliability, extend the complete machine ultra-low temperature air source heat pump in service life.
The utility model solves the technical scheme that its technical problem adopts: a kind of ultra-low temperature air source heat pump, comprise and be serially connected with successively compressor, cross valve, First Heat Exchanger, economizer, the refrigerant pipe line loop of heating power expansion valve and the second heat exchanger, the first interface of cross valve communicates with the high-pressure outlet of compressor, the second interface of cross valve communicates with First Heat Exchanger, the 3rd interface of cross valve communicates with the low-pressure inlet of compressor, the 4th interface of cross valve communicates with the second heat exchanger, on pipeline between economizer and heating power expansion valve, set up the increasing enthalpy branch road that is serially connected with electric expansion valve separately, increase after enthalpy branch road is connected in series electric expansion valve and economizer successively and communicate with the gas supplementing opening of compressor.
Be further used as the improvement of technical solutions of the utility model, be also provided with and increase enthalpy branch circuit parallel connection and be provided with the tonifying Qi branch road of electromagnetism two-port valve on the pipeline between economizer and heating power expansion valve, tonifying Qi branch road communicates with the gas supplementing opening of compressor after electromagnetism two-port valve.
Be further used as the improvement of technical solutions of the utility model, the pipeline between the 3rd interface of cross valve and the low-pressure inlet of compressor is provided with gas-liquid separator.
The beneficial effects of the utility model: in this ultra-low temperature air source heat pump, increasing enthalpy branch road draws from the pipeline between economizer and heating power expansion valve, make to increase enthalpy branch road and get liquid on the pipeline between economizer and heating power expansion valve, take full advantage of economizer and cross the degree of supercooling of cold side, the feed flow that increases enthalpy branch road for system provides advantage, the system that guaranteed is moved also and can normally be got liquid under bad working environments, thereby guarantee that system exhaust temperature can be not too high, improve the reliability of compressor operating, extend complete machine service life.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Fig. 1 is the structural representation of the utility model embodiment.
The specific embodiment
With reference to Fig. 1, the utility model provides a kind of ultra-low temperature air source heat pump, comprise and be serially connected with successively compressor 1, cross valve 2, First Heat Exchanger 3, economizer 4, the refrigerant pipe line loop of heating power expansion valve 5 and the second heat exchanger 6, the first interface 21 of cross valve 2 communicates with the high-pressure outlet of compressor 1, the second interface 22 of cross valve 2 communicates with First Heat Exchanger 3, the 3rd interface 23 of cross valve 2 communicates with the low-pressure inlet of compressor 1, the 4th interface 24 of cross valve 2 communicates with the second heat exchanger 6, on the pipeline that economizer 4 and heating power expansion valve are 5, set up the increasing enthalpy branch road 71 that is serially connected with electric expansion valve 7 separately, increase after enthalpy branch road 71 is connected in series electric expansion valve 7 and economizer 4 successively and communicate with the gas supplementing opening of compressor 1.
In this ultra-low temperature air source heat pump, increasing enthalpy branch road 71 draws from the pipeline of 5 of economizer 4 and heating power expansion valves, make to increase enthalpy branch road 71 and get liquid on the pipeline of 5 of economizer 4 and heating power expansion valves, take full advantage of economizer 4 and cross the degree of supercooling of cold side, the feed flow that increases enthalpy branch road 71 for system provides advantage, and the system that guaranteed is moved also and can normally be got liquid under bad working environments, thereby guarantees that system exhaust temperature can be not too high, improve compressor 1 reliability of operation, extend complete machine service life.
As the utility model preferred embodiment, on the pipeline of economizer 4 and 5 of heating power expansion valves, be also provided with to increase enthalpy branch road 71 in parallel and be provided with the tonifying Qi branch road 81 of electromagnetism two-port valve 8, tonifying Qi branch road 81 communicates with the gas supplementing opening of compressor 1 after described electromagnetism two-port valve 8.
As the utility model preferred embodiment, the pipeline between the 3rd interface 23 of cross valve 2 and the low-pressure inlet of compressor 1 is provided with gas-liquid separator 9.
This ultra-low temperature air source heat pump can provide and heat and the two kinds of patterns of freezing, and concrete principle is as follows:
1. heating mode: compressor 1 work, discharge the refrigerant gas of HTHP, refrigerant gas flows to from the first interface 21 of cross valve 2, from the second interface 22 of cross valve 2, flow out, enter in First Heat Exchanger 3, refrigerant gas becomes liquid after First Heat Exchanger 3 condensations, the high pressure refrigerant liquid flowing out from First Heat Exchanger 3 enters economizer 4 and carried out cold, refrigerant liquid after mistake from economizer 4 is out cold divides two-way to flow, the cold refrigerant liquid of mistake on one tunnel (increasing enthalpy branch road 71) becomes the gas-liquid mixture of low pressure after electric expansion valve 7 step-downs, also enter economizer 4 simultaneously, after becoming gas, economizer 4 inner refrigerant draw heats sucked by the auxilairy air intake of compressor 1, the cold refrigerant liquid of mistake on another road carries out after step-down through heating power expansion valve 5, flow to the second heat exchanger 6, cold-producing medium is at the second heat exchanger, after evaporating completely in 6, the 4th interface 24, the 3rd interface 23 through cross valve enters gas-liquid separator 9 successively, from gas-liquid separator 9, flow out again, from the low-pressure inlet of compressor 1, get back to compressor 1, complete and heat circulation.
2. refrigeration mode: compressor 1 work, discharge the refrigerant gas of HTHP, refrigerant gas flows to from the first interface 21 of cross valve 2, from the 4th interface 24 of cross valve 2, flow out, enter in the second heat exchanger 6, refrigerant gas becomes liquid after the second heat exchanger 6 condensations, refrigerant liquid carries out after step-down through heating power expansion valve 5, divide two-way to flow, the refrigerant liquid on one tunnel (increase enthalpy branch road 71) becomes the gas-liquid mixture of low pressure after step-down again through electric expansion valve 7, also enter economizer 4 simultaneously, after becoming gas, economizer 4 inner refrigerant draw heats sucked by the auxilairy air intake of compressor 1, the refrigerant liquid on another road enters economizer 4 and carried out cold, the refrigerant liquid of crossing after cold flows to First Heat Exchanger 3, after crossing cold refrigerant liquid and evaporating completely in First Heat Exchanger 3, the second interface 22, the 3rd interface 23 through cross valve enters gas-liquid separator 9 successively, from gas-liquid separator 9, flow out again, from the low-pressure inlet of compressor 1, get back to compressor 1, complete kind of refrigeration cycle.
Certainly, the invention is not limited to above-mentioned embodiment, those of ordinary skill in the art also can make equivalent variations or replacement under the prerequisite without prejudice to the utility model spirit, and the modification that these are equal to or replacement are all included in the application's claim limited range.

Claims (3)

1. a ultra-low temperature air source heat pump, it is characterized in that: comprise and be serially connected with successively compressor (1), cross valve (2), First Heat Exchanger (3), economizer (4), the refrigerant pipe line loop of heating power expansion valve (5) and the second heat exchanger (6), the first interface (21) of described cross valve (2) communicates with the high-pressure outlet of compressor (1), second interface (22) of described cross valve (2) communicates with First Heat Exchanger (3), the 3rd interface (23) of described cross valve (2) communicates with the low-pressure inlet of compressor (1), the 4th interface (24) of described cross valve (2) communicates with the second heat exchanger (6), on pipeline between described economizer (4) and heating power expansion valve (5), set up the increasing enthalpy branch road (71) that is serially connected with electric expansion valve (7) separately, described increasing enthalpy branch road (71) communicates with the gas supplementing opening of compressor (1) after being connected in series successively described electric expansion valve (7) and economizer (4).
2. ultra-low temperature air source heat pump according to claim 1, it is characterized in that: on the pipeline between described economizer (4) and heating power expansion valve (5), be also provided with in parallel with described increasing enthalpy branch road (71) and be provided with the tonifying Qi branch road (81) of electromagnetism two-port valve (8), described tonifying Qi branch road (81) communicates with the gas supplementing opening of compressor (1) after described electromagnetism two-port valve (8).
3. ultra-low temperature air source heat pump according to claim 1 and 2, is characterized in that: the pipeline between the 3rd interface (23) of described cross valve (2) and the low-pressure inlet of compressor (1) is provided with gas-liquid separator (9).
CN201320346203.7U 2013-06-17 2013-06-17 Ultralow-temperature air source heat pump Active CN203396155U (en)

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Application Number Priority Date Filing Date Title
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105258393A (en) * 2015-10-16 2016-01-20 珠海格力电器股份有限公司 Control system for heat pump unit
CN105627613A (en) * 2016-01-04 2016-06-01 广东美的暖通设备有限公司 Outdoor unit for air conditioner and air conditioner
US10119738B2 (en) 2014-09-26 2018-11-06 Waterfurnace International Inc. Air conditioning system with vapor injection compressor
CN110455013A (en) * 2018-05-08 2019-11-15 上海海立电器有限公司 Air injection enthalpy-increasing heat pump system
US10866002B2 (en) 2016-11-09 2020-12-15 Climate Master, Inc. Hybrid heat pump with improved dehumidification
US10871314B2 (en) 2016-07-08 2020-12-22 Climate Master, Inc. Heat pump and water heater
US10935260B2 (en) 2017-12-12 2021-03-02 Climate Master, Inc. Heat pump with dehumidification

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10753661B2 (en) 2014-09-26 2020-08-25 Waterfurnace International, Inc. Air conditioning system with vapor injection compressor
US10119738B2 (en) 2014-09-26 2018-11-06 Waterfurnace International Inc. Air conditioning system with vapor injection compressor
CN105258393A (en) * 2015-10-16 2016-01-20 珠海格力电器股份有限公司 Control system for heat pump unit
US20180306473A1 (en) * 2015-10-16 2018-10-25 Gree Electric Appliances, Inc. Of Zhuhai Heat Pump Unit Control System
US10393417B2 (en) * 2015-10-16 2019-08-27 Gree Electric Appliances, Inc. Of Zhuhai Heat pump unit control system with enhanced vapor injection capabilities for upstream and downstream liquid extraction
WO2017063591A1 (en) * 2015-10-16 2017-04-20 珠海格力电器股份有限公司 Heat pump unit control system
CN105627613A (en) * 2016-01-04 2016-06-01 广东美的暖通设备有限公司 Outdoor unit for air conditioner and air conditioner
CN105627613B (en) * 2016-01-04 2018-01-23 广东美的暖通设备有限公司 The outdoor unit and air conditioner of air conditioner
US10871314B2 (en) 2016-07-08 2020-12-22 Climate Master, Inc. Heat pump and water heater
US10866002B2 (en) 2016-11-09 2020-12-15 Climate Master, Inc. Hybrid heat pump with improved dehumidification
US10935260B2 (en) 2017-12-12 2021-03-02 Climate Master, Inc. Heat pump with dehumidification
CN110455013A (en) * 2018-05-08 2019-11-15 上海海立电器有限公司 Air injection enthalpy-increasing heat pump system

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