CN206399032U - Suitable for the CO of extremely cold area2Overlapping heat pump - Google Patents

Suitable for the CO of extremely cold area2Overlapping heat pump Download PDF

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Publication number
CN206399032U
CN206399032U CN201621421011.8U CN201621421011U CN206399032U CN 206399032 U CN206399032 U CN 206399032U CN 201621421011 U CN201621421011 U CN 201621421011U CN 206399032 U CN206399032 U CN 206399032U
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China
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valve
heat pump
capillary
compressor
heat exchanger
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Expired - Fee Related
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CN201621421011.8U
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Chinese (zh)
Inventor
刘勇
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Zhejiang Huifeng Energy Technology Co., Ltd.
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刘勇
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Abstract

The utility model discloses a kind of CO suitable for extremely cold area2Overlapping heat pump, is related to technical field of heat pumps, to solve existing CO2The energy consumed in overlapping heat pump can only be used for freezing and lacking the problem of utilizing two grades of the energy.CO described in the utility model suitable for extremely cold area2Overlapping heat pump, including:Carbon dioxide heat-pump kind of refrigeration cycle, common heat pump refrigeration cycle and the 3rd cooling and warming water circulation;3rd cooling and warming water circulation includes the second capillary and heat exchanger set gradually, and heat exchanger is communicated with the first compressor by reversal valve, and the first compressor has been sequentially communicated water heater, outdoor heat exchanger and the second capillary by reversal valve.Due to being provided with water heater between the first compressor and outdoor heat exchanger in the 3rd cooling and warming water cycle process, therefore, it is possible to make the CO suitable for extremely cold area2The function of water heating while overlapping heat pump realizes refrigeration, so as to effectively realize two grades of utilizations of the energy.

Description

Suitable for the CO of extremely cold area2Overlapping heat pump
Technical field
The utility model is related to technical field of heat pumps, especially relates to a kind of CO suitable for extremely cold area2Overlapping heat pump.
Background technology
Heat pump be it is a kind of can be typically first from the sky of nature by the device of the heat energy transfer of low level heat energy to high-order thermal source Low grade heat energy is obtained in gas and water or soil, is done work by electric power, then the high-grade heat that can be utilized is provided to people again Energy.
Specifically, CO2Overlapping heat pump can be mainly used in the freezing and refrigeration of food, crop seeds preservation with The fields such as Refrigeration System in Supermarkets, it has two sets of circulatory systems, and a set of is the gas circulation for being used as by carbon dioxide low-temperature zone, Another set of is the liquid circulation for being used as by freon etc. high temperature section, and two sets of circulatory systems can be associated in by evaporative condenser Together, and in the case where evaporative condenser is in cooling condition the effect for being exchanged heat, being freezed with realization.
However, present inventor has found, due to existing CO2The energy consumed in overlapping heat pump can only be used for Refrigeration, therefore lack two grades of utilizations to the energy.
Utility model content
The purpose of this utility model is to provide a kind of CO suitable for extremely cold area2Overlapping heat pump, it is existing to solve Some CO2The energy consumed in overlapping heat pump can only be used for freezing and lacking and ask two grades of technologies utilized of the energy Topic.
The utility model provides a kind of CO suitable for extremely cold area2Overlapping heat pump, including:Carbon dioxide heat-pump system SAPMAC method, common heat pump refrigeration cycle and the 3rd cooling and warming water circulation;The 3rd cooling and warming water circulation includes setting successively The second capillary and heat exchanger put, the heat exchanger are communicated with the first compressor, and first compressor by reversal valve Water heater, outdoor heat exchanger and second capillary have been sequentially communicated by the reversal valve.
Wherein, be provided with the 3rd control valve between second capillary and the heat exchanger, the reversal valve with it is described The 4th control valve is provided between water heater.
Specifically, the first fluid reservoir, the outdoor heat exchanger are provided between the reversal valve and first compressor The 3rd fluid reservoir is provided between second capillary.
During practical application, the carbon dioxide heat-pump kind of refrigeration cycle includes expansion valve, the outdoor heat exchange set gradually Device, internal exchanger, the second compressor and evaporative condenser, and the evaporative condenser by the internal exchanger with it is described Expansion valve is connected.
The common heat pump refrigeration cycle includes the first capillary and the evaporative condenser set gradually, the evaporation Condenser is communicated with first fluid reservoir and first compressor by the reversal valve, and first compressor passes through The reversal valve has been sequentially communicated the heat exchanger and first capillary.
Wherein, be provided with the first control valve between the evaporative condenser and the reversal valve, the heat exchanger with it is described The second control valve is provided between first capillary.
Specifically, it is provided with the second fluid reservoir between second control valve and first capillary.
Further, the reversal valve is four-way reversing valve.
Further, first control valve, second control valve, the 3rd control valve and the 4th control Valve is magnetic valve.
Relative to prior art, the CO described in the utility model suitable for extremely cold area2Overlapping heat pump have with Lower advantage:
The CO suitable for extremely cold area that the utility model is provided2In overlapping heat pump, including:Carbon dioxide heat-pump system SAPMAC method, common heat pump refrigeration cycle and the 3rd cooling and warming water circulation;3rd cooling and warming water circulation includes setting gradually The second capillary and heat exchanger, heat exchanger is communicated with the first compressor by reversal valve, and the first compressor passes through reversal valve It has been sequentially communicated water heater, outdoor heat exchanger and the second capillary.Thus analysis is understood, what the utility model was provided is applied to pole Tremble with fear regional CO2In overlapping heat pump, due to the first compressor and outdoor heat exchange in the 3rd cooling and warming water cycle process Water heater is provided between device, therefore, it is possible to make the CO suitable for extremely cold area2Overlapping heat pump realizes refrigeration while system The function of hot water, so as to effectively realize two grades of utilizations of the energy.
The utility model also provides a kind of CO suitable for extremely cold area2Overlapping heat pump and its control method, it is described Suitable for the CO of extremely cold area2Overlapping heat pump includes:3rd cooling and warming water circulation, carbon dioxide heat-pump kind of refrigeration cycle and Common heat pump refrigeration cycle;The second capillary that the 3rd cooling and warming water circulation includes setting gradually, the 3rd control valve, change Hot device, the heat exchanger is communicated with the first compressor by reversal valve, and first compressor by the reversal valve successively It is communicated with the 4th control valve, water heater, outdoor heat exchanger and second capillary;The carbon dioxide heat-pump kind of refrigeration cycle bag Include the expansion valve set gradually, the outdoor heat exchanger, internal exchanger, the second compressor and evaporative condenser, and the steaming The condenser that feels cold is connected by the internal exchanger with the expansion valve;The common heat pump refrigeration cycle includes what is set gradually First capillary and the evaporative condenser, the evaporative condenser are connected through the first control valve and by the reversal valve State the first compressor, and first compressor by the reversal valve be sequentially communicated the heat exchanger, the second control valve and First capillary;The CO suitable for extremely cold area2The control method of overlapping heat pump includes:Cooling in summer is simultaneously Heat water condition and winter heating's operating mode;The cooling in summer heats water condition simultaneously and comprised the following steps:Close described first Control valve and second control valve, open the 3rd control valve and the 4th control valve, and the reversal valve is adjusted to Refrigeration mode;Refrigeration working medium enters the heat exchanger after second capillary by the 3rd control valve;After heat absorption according to It is secondary after the reversal valve and first compressor compresses, once exchanged heat into the water heater;Pass through after heat release The outdoor heat exchanger carries out secondary heat exchange heat release;Second capillary is back to after heat release and completes refrigeration while water heating is followed Ring;Winter heating's operating mode comprises the following steps:Close the 3rd control valve and the 4th control valve, open described the One control valve and second control valve, and the reversal valve is adjusted to heating mode;Low-temperature zone refrigerant carbon dioxide passes through The expansion valve enters the outdoor heat exchanger, and absorbs outdoor heat;Enter described second after the internal exchanger Compressor;Enter the evaporative condenser after second compressor compresses, the expansion valve is back to after heat release and completes low Temperature section is circulated;The refrigerant working medium of high temperature section enters the evaporative condenser through first capillary and absorbs low-temperature zone heat simultaneously Exchanged heat;Sequentially pass through after the reversal valve and first compressor compresses, into the heat exchanger;Institute is back to after heat release State the first capillary and complete high temperature section circulation.
The CO suitable for extremely cold area2Overlapping heat pump and its control method are with above-mentioned suitable for extremely cold area CO2Overlapping heat pump has the advantage that identical relative to prior art, will not be repeated here.
Brief description of the drawings
, below will be right in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art The accompanying drawing used required in embodiment or description of the prior art is briefly described, it should be apparent that, describe below In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
The CO suitable for extremely cold area that Fig. 1 provides for the utility model embodiment2The structural representation of overlapping heat pump Figure;
The CO suitable for extremely cold area that Fig. 2 provides for the utility model embodiment2Cooling in summer in overlapping heat pump Water heating flows to schematic diagram simultaneously;
The CO suitable for extremely cold area that Fig. 3 provides for the utility model embodiment2Winter heating in overlapping heat pump Flow to schematic diagram;
The CO suitable for extremely cold area that Fig. 4 provides for the utility model embodiment2The control method of overlapping heat pump Schematic flow sheet.
In figure:1- expansion valves;2- outdoor heat exchangers;3- internal exchangers;The compressors of 4- second;5- the 4th is controlled Valve;The capillaries of 6- second;The fluid reservoirs of 7- the 3rd;The control valves of 8- the 3rd;The control valves of 9- second;The fluid reservoirs of 10- second; The capillaries of 11- first;12- evaporative condensers;The control valves of 13- first;The fluid reservoirs of 14- first;The compressors of 15- first; 16- reversal valves;17- heat exchangers;18- water heaters.
Embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with accompanying drawing, it is clear that described Embodiment is a part of embodiment of the utility model, rather than whole embodiments.Based on the embodiment in the utility model, sheet The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to this practicality Novel protected scope.
, it is necessary to explanation in description of the present utility model, term " " center ", " on ", " under ", it is "left", "right", " perpendicular Directly ", the orientation or position relationship of the instruction such as " level ", " interior ", " outer " are, based on orientation shown in the drawings or position relationship, to be only Described for the ease of description the utility model and simplifying, rather than to indicate or imply that signified device or element must have specific Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.In addition, term " the One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that indicating or implying relative importance.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly Connection;Can be mechanical connection or electrical connection;Can be joined directly together, the indirect phase of intermediary can also be passed through Even, can be the connection of two element internals.For the ordinary skill in the art, it can understand above-mentioned with concrete condition Concrete meaning of the term in the utility model.
The CO suitable for extremely cold area that Fig. 1 provides for the utility model embodiment2The structural representation of overlapping heat pump Figure.
As shown in figure 1, the utility model embodiment provides a kind of CO suitable for extremely cold area2Overlapping heat pump, bag Include:Carbon dioxide heat-pump kind of refrigeration cycle, common heat pump refrigeration cycle and the 3rd cooling and warming water circulation;3rd refrigerated medium hot water is followed Ring includes the second capillary 6 and heat exchanger 17 set gradually, and heat exchanger 17 is communicated with the first compressor 15 by reversal valve 16, And first compressor 15 water heater 18, the capillary 6 of outdoor heat exchanger 2 and second have been sequentially communicated by reversal valve 16.
Relative to prior art, the CO suitable for extremely cold area described in the utility model embodiment2Overlapping heat pump Have the advantage that:
The CO suitable for extremely cold area that the utility model embodiment is provided2In overlapping heat pump, as shown in figure 1, bag Include:Carbon dioxide heat-pump kind of refrigeration cycle, common heat pump refrigeration cycle and the 3rd cooling and warming water circulation;3rd refrigerated medium hot water Circulation includes the second capillary 6 and heat exchanger 17 set gradually, and heat exchanger 17 is communicated with the first compressor by reversal valve 16 15, and the first compressor 15 has been sequentially communicated water heater 18, the capillary 6 of outdoor heat exchanger 2 and second by reversal valve 16.Thus Knowable to analysis, the CO suitable for extremely cold area that the utility model embodiment is provided2In overlapping heat pump, due to the 3rd refrigeration Heat and be provided with water heater 18 between the first compressor 15 and outdoor heat exchanger 2 in water cycle process, therefore, it is possible to make to be applicable In the CO of extremely cold area2The function of water heating while overlapping heat pump realizes refrigeration, so as to effectively realize the two of the energy Level is utilized.
Wherein, for the ease of making the CO suitable for extremely cold area2Overlapping heat pump cooling in summer simultaneously water heating with Switched between the two operating modes of winter heating, as shown in figure 1, can be set between above-mentioned second capillary 6 and heat exchanger 17 The 3rd control valve 8 is equipped with, the 4th control valve 5 can be provided between reversal valve 16 and water heater 18.Therefore, when the 3rd control valve 8 and the 4th control valve 5 when opening (other control valve closings) and reversal valve 16 and being in refrigeration mode, it is adaptable to extremely cold area CO2Overlapping heat pump is at cooling in summer while heating water condition;When the 3rd control valve 8 and the 4th control valve 5 are closed When (corresponding control valve unlatching) and reversal valve 16 are in heating mode, it is adaptable to the CO of extremely cold area2Overlapping heat pump can In winter heating's operating mode.
Specifically, as shown in figure 1, the first fluid reservoir can be provided between the compressor 15 of above-mentioned reversal valve 16 and first 14, the 3rd fluid reservoir 7 can be provided between the capillary 6 of outdoor heat exchanger 2 and second.Firstth, the 3rd fluid reservoir (14,7) energy Enough play a part of storing refrigerant, additionally it is possible to play a part of slow pressure and point liquid.
During practical application, the CO suitable for extremely cold area that the utility model embodiment is provided2In overlapping heat pump, such as Shown in Fig. 1, carbon dioxide heat-pump kind of refrigeration cycle can include expansion valve 1, outdoor heat exchanger 2, the internal exchanger set gradually 3rd, the second compressor 4 and evaporative condenser 12, and the evaporative condenser 12 connected by internal exchanger 3 with expansion valve 1;Commonly Heat pump refrigeration cycle can include the first capillary 11 and evaporative condenser 12 set gradually, and the evaporative condenser 12 is by changing The first fluid reservoir 14 and the first compressor 15 are communicated with to valve 16, and first compressor 15 has been sequentially communicated by reversal valve 16 The capillary 11 of heat exchanger 17 and first, so that carbon dioxide heat-pump kind of refrigeration cycle and common heat pump refrigeration cycle can make to be applied to The CO of extremely cold area2Overlapping heat pump effectively realizes the effect of winter heating.
Herein it should be added that, the above-mentioned capillary 6 of first capillary 11 and second can function similarly to expansion The effect of valve.
Wherein, as shown in figure 1, the first control valve 13 can be provided between above-mentioned evaporative condenser 12 and reversal valve 16, The second control valve 9 can be provided between the capillary 11 of heat exchanger 17 and first;Specifically, above-mentioned second control valve 9 and first The second fluid reservoir 10 is also provided between capillary 11.
The CO suitable for extremely cold area that Fig. 2 provides for the utility model embodiment2Cooling in summer in overlapping heat pump Water heating flows to schematic diagram simultaneously;The CO suitable for extremely cold area that Fig. 3 provides for the utility model embodiment2Overlapping heat pump Winter heating flows to schematic diagram in system.
Further, in order to easily realize the conversions of two operating modes, what the utility model embodiment was provided is applied to pole Tremble with fear regional CO2In overlapping heat pump, above-mentioned reversal valve 16 can be preferably four-way reversing valve.When actual use, work as four-way When reversal valve is in refrigeration mode, as shown in Fig. 2 flow direction in the 3rd cooling and warming water circulation for successively by heat exchanger 17, change To valve 16, the first fluid reservoir 14, the first compressor 15 and through the control valve 5 of reversal valve 16 to the 4th and the outdoor heat exchange of water heater 18 Device 2;When four-way reversing valve is in heating mode, as shown in figure 3, the flow direction in common heat pump refrigeration cycle is successively by evaporating Condenser 12, the first control valve 13, reversal valve 16, the first fluid reservoir 14, the first compressor 15 and through reversal valve 16 to heat exchanger 17。
Further, automatically controlled to realize, the CO suitable for extremely cold area that the utility model embodiment is provided2 In overlapping heat pump, above-mentioned first control valve 13, the second control valve 9, the 3rd control valve 8 and the 4th control valve 5 can be Magnetic valve.
The CO suitable for extremely cold area that Fig. 4 provides for the utility model embodiment2The control method of overlapping heat pump Schematic flow sheet.
The utility model embodiment also provides a kind of CO suitable for extremely cold area2Overlapping heat pump and its controlling party Method, as shown in Figure 1-Figure 3, including:3rd cooling and warming water circulation, carbon dioxide heat-pump kind of refrigeration cycle and common heat pump refrigerating Circulation;3rd cooling and warming water circulation includes the second capillary 6, the 3rd control valve 8, the heat exchanger 17 set gradually, heat exchange Device 17 is communicated with the first compressor 15 by reversal valve 16, and the first compressor 15 has been sequentially communicated the 4th control by reversal valve 16 Valve 5 processed, water heater 18, the capillary 6 of outdoor heat exchanger 2 and second;The carbon dioxide heat-pump kind of refrigeration cycle includes what is set gradually Expansion valve 1, outdoor heat exchanger 2, internal exchanger 3, the second compressor 4 and evaporative condenser 12, and evaporative condenser 12 passes through Internal exchanger 3 is connected with expansion valve 1;The common heat pump refrigeration cycle includes the first capillary 11 set gradually and evaporated cold Condenser 12, evaporative condenser 12 through the first control valve 13 and is communicated with the first compressor 15, and the first compression by reversal valve 16 Machine 15 has been sequentially communicated heat exchanger 17, the second control valve 9 and the first capillary 11 by reversal valve 16.As shown in figure 4, control Method includes:Cooling in summer heats water condition and winter heating's operating mode simultaneously;With reference to shown in Fig. 2, above-mentioned cooling in summer is made simultaneously Hot water operating mode may include steps of:Step S11, the first control valve 13 of closing and the second control valve 9, open the 3rd control valve 8 and the 4th control valve 5, and reversal valve 16 is adjusted to refrigeration mode;Step S12, refrigeration working medium pass through after the second capillary 6 Three control valves 8 enter heat exchanger 17;Sequentially pass through after the compression of the compressor 15 of reversal valve 16 and first, enter after step S13, heat absorption Water heater 18 is once exchanged heat;Secondary heat exchange heat release is carried out by outdoor heat exchanger 2 after step S14, heat release;Step S15, put The second capillary 6 is back to after heat and completes refrigeration while heating water circulation;With reference to shown in Fig. 3, above-mentioned winter heating's operating mode can be wrapped Include following steps:Step S21, the 3rd control valve 8 of closing and the 4th control valve 5, open the first control valve 13 and the second control valve 9, and reversal valve 16 is adjusted to heating mode;Step S22, low-temperature zone refrigerant carbon dioxide are changed by expansion valve 1 into outdoor Hot device 2, and absorb outdoor heat;Step S23, after internal exchanger 3 enter the second compressor 4;Step S24, through second Compressor 4 enters evaporative condenser 12 after compressing, and expansion valve 1 is back to after heat release and low-temperature zone circulation is completed;Step S31, high temperature The refrigerant working medium of section enters the absorption low-temperature zone heat of evaporative condenser 12 through the first capillary 11 and exchanged heat;Step S32, Sequentially pass through after the compression of the compressor 15 of reversal valve 16 and first, into heat exchanger 17;The first capillary is back to after step S33, heat release Pipe 11 simultaneously completes high temperature section circulation.
Herein it should be added that, during winter heating's operating mode, high temperature section refrigerant after low-temperature zone refrigerant is first circulated Recycling, and low-temperature zone refrigerant can be continued cycling through as needed during high temperature section refrigerant circulation.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model Within the spirit and principle of utility model, any modification, equivalent substitution and improvements made etc. should be included in the utility model Protection domain within.

Claims (10)

1. a kind of CO suitable for extremely cold area2Overlapping heat pump, it is characterised in that including:Carbon dioxide heat-pump refrigeration is followed Ring, common heat pump refrigeration cycle and the 3rd cooling and warming water circulation;
The 3rd cooling and warming water circulation includes the second capillary and heat exchanger set gradually, and the heat exchanger passes through commutation Valve is communicated with the first compressor, and first compressor has been sequentially communicated water heater, outdoor heat exchanger by the reversal valve With second capillary.
2. the CO according to claim 1 suitable for extremely cold area2Overlapping heat pump, it is characterised in that described second mao The 3rd control valve is provided between tubule and the heat exchanger, the 4th control is provided between the reversal valve and the water heater Valve.
3. the CO according to claim 2 suitable for extremely cold area2Overlapping heat pump, it is characterised in that the reversal valve The first fluid reservoir is provided between first compressor, is provided between the outdoor heat exchanger and second capillary 3rd fluid reservoir.
4. the CO according to claim 3 suitable for extremely cold area2Overlapping heat pump, it is characterised in that the titanium dioxide Carbon heat pump refrigeration cycle includes expansion valve, the outdoor heat exchanger, internal exchanger, the second compressor and the evaporation set gradually Condenser, and the evaporative condenser connected by the internal exchanger with the expansion valve.
5. the CO according to claim 4 suitable for extremely cold area2Overlapping heat pump, it is characterised in that the ordinary hot Pump kind of refrigeration cycle includes the first capillary and the evaporative condenser set gradually, and the evaporative condenser passes through the commutation Valve is communicated with first fluid reservoir and first compressor, and first compressor is sequentially communicated by the reversal valve There are the heat exchanger and first capillary.
6. the CO according to claim 5 suitable for extremely cold area2Overlapping heat pump, it is characterised in that the evaporation is cold The first control valve is provided between condenser and the reversal valve, second is provided between the heat exchanger and first capillary Control valve.
7. the CO according to claim 6 suitable for extremely cold area2Overlapping heat pump, it is characterised in that second control The second fluid reservoir is provided between valve processed and first capillary.
8. the CO according to claim 1 suitable for extremely cold area2Overlapping heat pump, it is characterised in that the reversal valve For four-way reversing valve.
9. the CO according to claim 6 suitable for extremely cold area2Overlapping heat pump, it is characterised in that first control Valve processed, second control valve, the 3rd control valve and the 4th control valve are magnetic valve.
10. a kind of CO suitable for extremely cold area2Overlapping heat pump, it is characterised in that including:3rd cooling and warming water circulation, Carbon dioxide heat-pump kind of refrigeration cycle and common heat pump refrigeration cycle;
The 3rd cooling and warming water circulation includes the second capillary, the 3rd control valve, the heat exchanger set gradually, the heat exchange Device is communicated with the first compressor by reversal valve, and first compressor has been sequentially communicated the 4th control by the reversal valve Valve, water heater, outdoor heat exchanger and second capillary;
Expansion valve that the carbon dioxide heat-pump kind of refrigeration cycle includes setting gradually, the outdoor heat exchanger, internal exchanger, the Two compressors and evaporative condenser, and the evaporative condenser connected by the internal exchanger with the expansion valve;
The common heat pump refrigeration cycle includes the first capillary and the evaporative condenser set gradually, the evaporative condenser Device through the first control valve and is communicated with first compressor by the reversal valve, and first compressor is changed by described The heat exchanger, the second control valve and first capillary have been sequentially communicated to valve.
CN201621421011.8U 2016-12-22 2016-12-22 Suitable for the CO of extremely cold area2Overlapping heat pump Expired - Fee Related CN206399032U (en)

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Application Number Priority Date Filing Date Title
CN201621421011.8U CN206399032U (en) 2016-12-22 2016-12-22 Suitable for the CO of extremely cold area2Overlapping heat pump

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Application Number Priority Date Filing Date Title
CN201621421011.8U CN206399032U (en) 2016-12-22 2016-12-22 Suitable for the CO of extremely cold area2Overlapping heat pump

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106766308A (en) * 2016-12-22 2017-05-31 刘勇 Suitable for the CO of extremely cold area2Overlapping heat pump and its control method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106766308A (en) * 2016-12-22 2017-05-31 刘勇 Suitable for the CO of extremely cold area2Overlapping heat pump and its control method

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Effective date of registration: 20180514

Address after: 100085 0112-159 01, No. 26, Shang Di Information Road, Haidian District, Beijing.

Patentee after: Beijing Hui Feng Energy Technology Co., Ltd.

Address before: 100085 Zhongguancun business building, 26 Information Road, Haidian District, Beijing.

Patentee before: Liu Yong

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Effective date of registration: 20190809

Address after: 313200 No. 926 Changhong East Street, Fuxi Street, Deqing County, Huzhou City, Zhejiang Province (Mogan Mountain National High-tech Zone)

Patentee after: Zhejiang Huifeng Energy Technology Co., Ltd.

Address before: 100085, No. 01, No. 26 Information Road, Beijing, Haidian District, 0112-159

Patentee before: Beijing Hui Feng Energy Technology Co., Ltd.

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Granted publication date: 20170811

Termination date: 20191222