CN205026983U - Take low ambient temperature air source heat pump system of cold loop - Google Patents

Take low ambient temperature air source heat pump system of cold loop Download PDF

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Publication number
CN205026983U
CN205026983U CN201520749439.4U CN201520749439U CN205026983U CN 205026983 U CN205026983 U CN 205026983U CN 201520749439 U CN201520749439 U CN 201520749439U CN 205026983 U CN205026983 U CN 205026983U
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check valve
heat exchanger
port
connects
valve
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徐鸿仪
王洋
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Wuxi Tongfang Artificial Environment Co Ltd
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Wuxi Tongfang Artificial Environment Co Ltd
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Abstract

The utility model relates to an air source heat pump refrigerating system, specific take low ambient temperature air source heat pump system of cold loop that says so belongs to the technical field of air source heat pump system. It includes major loop, subloop, crosses cold loop and check valve subassembly, and the tonifying qi increases the first exit linkage four -way reversing valve's of enthalpy compressor first port, the first port of heat exchanger in four -way reversing valve's the second port junction chamber, and the entry end of check valve subassembly is connected to the second port of indoor heat exchanger. The utility model discloses a major loop, subloop and mistake cold loop are optimized, increase the refrigerating system's under the air source heat pump low temperature environment circulation flow, introduce the outdoor heat exchanger bottom with the high temperature refrigerant for outdoor heat exchanger bottom temperature is higher than the zero degree always under the low temperature environment temperature, and the heat exchanger bottom can not freeze, winter the outdoor heat exchanger comdenstion water with change white hydroenergy and enough smoothly discharge, avoided cold and high humidity environment to pile up the phenomenon that leads to the unable normal operating of unit because of the ice sheet down.

Description

Be with the low ambient temperature air source heat pump system of cold loop
Technical field
The utility model relates to a kind of air source heat pump refrigeration system, specifically a kind of with the low ambient temperature air source heat pump system of cold loop, belong to air source heat pump system technical field.
Background technology
The a lot of area of current northern China is still continued to use boilerheating, the pollutant of boiler combustion coal low-altitude discharged is one of important assailant forming northern area haze and PM2.5.Will thoroughly administer northern haze, eliminating coal-fired arcola is fundamental solution.Encourage and help the new energy source energy-saving environmental protection industry developments such as air source heat pump industry to be solve one of northern area haze main path.
But, air source heat pump be generalized to the cold districts such as the Huanghe valley, North China, northwest (Heating Design temperature-5 ~-20 DEG C of scopes) suffer from low ambient temperature under serious, the problem such as Energy Efficiency Ratio is low of heating capacity decay; In addition, because outdoor temperature is longer lower than the time of zero degrees celsius, if in the winter time unit defrost time the defrosting water that produces can not discharge in time, can cause freezing bottom outdoor heat exchanger, there will be because ice sheet piles up the phenomenon causing unit normally to run.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned weak point, thus provide a kind of with the low ambient temperature air source heat pump system of cold loop, not only can suppress air source heat pump heating capacity attenuation rate at low ambient temperatures, and winter heating's outdoor heat exchanger icing phenomenon under low temperature and high relative humidity environment can be solved, coefficient of performance of refrigerating during cooling in summer can be improved simultaneously.
According to the technical scheme that the utility model provides, be with the low ambient temperature air source heat pump system of cold loop to comprise major loop, subloop, cross cold loop and check valve assembly, major loop comprises tonifying Qi and increases enthalpy compressor, four-way change-over valve, indoor heat exchanger, reservoir, outdoor heat exchanger and gas-liquid separator; Subloop comprises economizer, electric expansion valve and blowdown pipe, it is characterized in that: tonifying Qi increases the first port of the first outlet connection four-way change-over valve of enthalpy compressor, second port of four-way change-over valve connects the first port of indoor heat exchanger, and the second port of indoor heat exchanger connects the arrival end of check valve assembly;
Described check valve assembly comprises the first check valve, the second check valve, the 3rd check valve and the 4th check valve, and the pipeline after the pipeline after the first check valve, the 3rd check valve are connected in series and the second check valve, the 4th check valve are connected in series is connected in parallel;
First entrance of reservoir is connected with between the first check valve and the 3rd check valve, first outlet of reservoir connects economizer first entrance by crossing cold loop, first outlet of economizer connects the first entrance of heating power expansion valve by the first branch road, the first outlet of heating power expansion valve is connected with between the second check valve, the 4th check valve;
First port of the port of export junction chamber external heat exchanger of check valve assembly, second port of outdoor heat exchanger connects the 4th port of four-way change-over valve, 3rd port of four-way change-over valve connects the first entrance of gas-liquid separator, and the first outlet of gas-liquid separator connects the first entrance that tonifying Qi increases enthalpy compressor;
First outlet of economizer connects the first entrance of electric expansion valve by the second branch road, the first outlet of electric expansion valve connects the second entrance of economizer, and the second outlet of economizer connects by blowdown pipe the gas supplementing opening that tonifying Qi increases enthalpy compressor.
Further, the bottom of body through outdoor heat exchanger of cold loop is crossed.
Further, heating power expansion valve is other is provided with the magnetic valve be connected in parallel with heating power expansion valve.
Compared with the prior art the utility model has the following advantages:
The utility model is by major loop, subloop and cross cold loop optimum organization, the first, increases the circular flow of the refrigeration system under air source heat pump low temperature environment; Second, high temperature refrigerant is introduced bottom outdoor heat exchanger, under making low temperature environment temperature, outdoor heat exchanger bottom temp is always higher than zero degree, exchanger base can not freeze, winter outdoor heat exchanger condensed water and defrosting water can smooth and easyly discharge, avoid under cold high humidity environment because ice sheet piles up the phenomenon causing unit normally to run; 3rd, if cold-producing medium is first by entering outdoor heat exchanger again after economizer, the cold-producing medium after cold can be caused in outdoor heat exchanger again by the problem heated when freezing, by flow of refrigerant direction setting for first by entering economizer after outdoor heat exchanger again, effectively prevent the problems referred to above, add the degree of supercooling of cold-producing medium during refrigeration simultaneously, improve coefficient of performance of refrigerating.
Accompanying drawing explanation
Fig. 1 is the utility model front view.
Description of reference numerals: 1-tonifying Qi increasing enthalpy compressor, 2-four-way change-over valve, 3-indoor heat exchanger, 4-reservoir, 5-outdoor heat exchanger, 6-gas-liquid separator, 7-first check valve, 8-second check valve, 9-the 3rd check valve, 10-the 4th check valve, 11-cross cold loop, 12-heating power expansion valve, 13-magnetic valve, 14-economizer, 15-electric expansion valve, 16-blowdown pipe.
Detailed description of the invention
Embodiment in is by reference to the accompanying drawings further described by the utility model below:
As shown in Figure 1, the utility model mainly comprises major loop, subloop, crosses cold loop 11 and check valve assembly, and major loop comprises tonifying Qi and increases enthalpy compressor 1, four-way change-over valve 2, indoor heat exchanger 3, reservoir 4, outdoor heat exchanger 5 and gas-liquid separator 6; Subloop comprises economizer 14, electric expansion valve 15 and blowdown pipe 16.
Tonifying Qi increases the first port of the first outlet connection four-way change-over valve 2 of enthalpy compressor 1, and the second port of four-way change-over valve 2 connects the first port of indoor heat exchanger 3, and the second port of indoor heat exchanger 3 connects the arrival end of check valve assembly.
Described check valve assembly comprise the first check valve 7, second check valve 8, the 3rd check valve 9 and the 4th check valve 10, first check valve 7, the 3rd check valve 9 be connected in series after pipeline and the second check valve 8, the 4th check valve 10 be connected in series after pipeline be connected in parallel.
First entrance of reservoir 4 is connected with between the first check valve 7 and the 3rd check valve 9, first outlet of reservoir 4 connects economizer 14 first entrance by crossing cold loop 11, first outlet of economizer 14 connects the first entrance of heating power expansion valve 12 by the first branch road, the first outlet of heating power expansion valve 12 is connected with between the second check valve 8, the 4th check valve 10.
First port of the port of export junction chamber external heat exchanger 5 of check valve assembly, the second port of outdoor heat exchanger 5 connects the 4th port of four-way change-over valve 2.3rd port of four-way change-over valve 2 connects the first entrance of gas-liquid separator 6, and the first outlet of gas-liquid separator 6 connects the first entrance that tonifying Qi increases enthalpy compressor 1.
First outlet of economizer 14 connects the first entrance of electric expansion valve 15 by the second branch road, first outlet of electric expansion valve 15 connects the second entrance of economizer 14, and the second outlet of economizer 14 connects by blowdown pipe 16 gas supplementing opening that tonifying Qi increases enthalpy compressor 1.
The described bottom of body through outdoor heat exchanger 5 crossing cold loop 11, the cold-producing medium crossed in cold loop 11 improves outdoor heat exchanger 5 bottom temp, reduces cold loop tube refrigerant temperature simultaneously.
Described heating power expansion valve 12 is other is provided with the magnetic valve 13 be connected in parallel with heating power expansion valve 12.
Major loop can have two kinds of shunting modes through economizer: first kind of way be main circuit refrigerant first by economizer after shunt again, first branch road connect expansion valve module, second branch road connect electric expansion valve; First the second way for be divided into two branch roads before entering economizer, and the first branch road connects economizer, and the second branch road connects electric expansion valve.
Operation principle of the present utility model is: in a heating mode, the cold-producing medium of HTHP increases enthalpy compressor through four-way change-over valve from tonifying Qi, reservoir is flowed into through check valve after cooling in indoor heat exchanger, the cold-producing medium flowed out from reservoir passes through bottom outdoor heat exchanger through cold loop, improve outdoor heat exchanger bottom temp, reduce tube refrigerant temperature simultaneously.Then after economizer, be divided into two branch roads, first branch road flows into heating power expansion valve, second branch road flows into electric expansion valve, the low-temperature refrigerant of cold-producing medium in economizer and after electric expansion valve throttling that exchanger base flows out outdoor carries out heat exchange, not only strengthen the degree of supercooling of main circuit refrigerant, and the degree of superheat of heating subloop cold-producing medium, cold-producing medium in subloop enters tonifying Qi by blowdown pipe and increases in enthalpy compressor gas supplementing opening, cold-producing medium is through heating power expansion valve, magnetic valve is in closed condition, main circuit refrigerant is only by heating power expansion valve, cold-producing medium after heating power expansion valve throttling is entered in outdoor heat exchanger by check valve and carries out heat exchange, gas-liquid separator is entered by four-way change-over valve after heat exchange completes, if entering the cold-producing medium when gas-liquid separator is gas-liquid mixture, in gas-liquid separator 5 by fluid separation applications bottom it, gaseous refrigerant enters tonifying Qi by air entry and increases in enthalpy compressor, complete and once heat circulation.
In cooling mode, the cold-producing medium of HTHP increases enthalpy compressor through four-way change-over valve from tonifying Qi, flow into reservoir through check valve after cooling in outdoor heat exchanger, the cold-producing medium flowed out from reservoir passes through, bottom outdoor heat exchanger, again to reduce tube refrigerant temperature through cold loop, then after economizer, be divided into two branch roads, first branch road flows into heating power expansion valve, second branch road flows into electric expansion valve, the low-temperature refrigerant of cold-producing medium in economizer and after electric expansion valve throttling that exchanger base flows out outdoor carries out heat exchange, not only strengthen the degree of supercooling of main circuit refrigerant, and the degree of superheat of heating subloop cold-producing medium, cold-producing medium in subloop enters tonifying Qi by blowdown pipe and increases in enthalpy compressor gas supplementing opening, cold-producing medium is through expansion valve module, magnetic valve is in closed condition, main circuit refrigerant is only by heating power expansion valve, cold-producing medium after heating power expansion valve throttling is entered in outdoor heat exchanger by check valve and carries out heat exchange, gas-liquid separator is entered by four-way change-over valve after heat exchange completes, if entering the cold-producing medium when gas-liquid separator is gas-liquid mixture, in gas-liquid separator by fluid separation applications bottom it, gaseous refrigerant enters tonifying Qi by air entry and increases in enthalpy compressor, complete a kind of refrigeration cycle.
Major loop of the present utility model is having two kinds of shunting modes through economizer: first kind of way be main circuit refrigerant first by economizer after shunt again, first branch road connect heating power expansion valve, second branch road connect electric expansion valve; First the second way for be divided into two branch roads before entering economizer, and the first branch road connects economizer, and the second branch road connects electric expansion valve.The utility model is by major loop, subloop and cross cold loop optimum organization, the first, increases the circular flow of the refrigeration system under air source heat pump low temperature environment; Second, high temperature refrigerant is introduced bottom outdoor heat exchanger, under making low temperature environment temperature, outdoor heat exchanger bottom temp is always higher than zero degree, exchanger base can not freeze, winter outdoor heat exchanger condensed water and defrosting water can smooth and easyly discharge, avoid under cold high humidity environment because ice sheet piles up the phenomenon causing unit normally to run; 3rd, if cold-producing medium is first by entering outdoor heat exchanger again after economizer, the cold-producing medium after cold can be caused in outdoor heat exchanger again by the problem heated when freezing, by flow of refrigerant direction setting for first by entering economizer after outdoor heat exchanger again, effectively prevent the problems referred to above, add the degree of supercooling of cold-producing medium during refrigeration simultaneously, improve coefficient of performance of refrigerating.

Claims (3)

1. one kind with the low ambient temperature air source heat pump system of cold loop, comprise major loop, subloop, cross cold loop (11) and check valve assembly, major loop comprises tonifying Qi and increases enthalpy compressor (1), four-way change-over valve (2), indoor heat exchanger (3), reservoir (4), outdoor heat exchanger (5) and gas-liquid separator (6); Subloop comprises economizer (14), electric expansion valve (15) and blowdown pipe (16), it is characterized in that: tonifying Qi increases the first port of the first outlet connection four-way change-over valve (2) of enthalpy compressor (1), second port of four-way change-over valve (2) connects the first port of indoor heat exchanger (3), and the second port of indoor heat exchanger (3) connects the arrival end of check valve assembly;
Described check valve assembly comprises the first check valve (7), the second check valve (8), the 3rd check valve (9) and the 4th check valve (10), and the pipeline after the pipeline after the first check valve (7), the 3rd check valve (9) are connected in series and the second check valve (8), the 4th check valve (10) are connected in series is connected in parallel;
First entrance of reservoir (4) is connected with between the first check valve (7) and the 3rd check valve (9), first outlet of reservoir (4) connects economizer (14) first entrance by crossing cold loop (11), first outlet of economizer (14) connects the first entrance of heating power expansion valve (12) by the first branch road, the first outlet of heating power expansion valve (12) is connected with between the second check valve (8), the 4th check valve (10);
First port of the port of export junction chamber external heat exchanger (5) of check valve assembly, second port of outdoor heat exchanger (5) connects the 4th port of four-way change-over valve (2), 3rd port of four-way change-over valve (2) connects the first entrance of gas-liquid separator (6), and the first outlet of gas-liquid separator (6) connects the first entrance that tonifying Qi increases enthalpy compressor (1);
First outlet of economizer (14) connects the first entrance of electric expansion valve (15) by the second branch road, first outlet of electric expansion valve (15) connects the second entrance of economizer (14), and the second outlet of economizer (14) connects by blowdown pipe (16) gas supplementing opening that tonifying Qi increases enthalpy compressor (1).
2. as claimed in claim 1 with the low ambient temperature air source heat pump system of cold loop, it is characterized in that: the described bottom of body through outdoor heat exchanger (5) crossing cold loop (11).
3. as claimed in claim 1 with the low ambient temperature air source heat pump system of cold loop, it is characterized in that: described heating power expansion valve (12) is other is provided with the magnetic valve (13) be connected in parallel with heating power expansion valve (12).
CN201520749439.4U 2015-09-24 2015-09-24 Take low ambient temperature air source heat pump system of cold loop Active CN205026983U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105157270A (en) * 2015-09-24 2015-12-16 无锡同方人工环境有限公司 Low-environment-temperature air source heat pump system with undercooling loop
CN110762889A (en) * 2019-10-23 2020-02-07 广东纽恩泰新能源科技发展有限公司 Air source heat pump system for preventing frost accumulation
CN113154514A (en) * 2021-05-19 2021-07-23 大连理工大学 Machine-pump combined-drive enthalpy-increasing type air source heat pump user three-purpose machine for cooling, heating and water heating

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105157270A (en) * 2015-09-24 2015-12-16 无锡同方人工环境有限公司 Low-environment-temperature air source heat pump system with undercooling loop
CN110762889A (en) * 2019-10-23 2020-02-07 广东纽恩泰新能源科技发展有限公司 Air source heat pump system for preventing frost accumulation
CN113154514A (en) * 2021-05-19 2021-07-23 大连理工大学 Machine-pump combined-drive enthalpy-increasing type air source heat pump user three-purpose machine for cooling, heating and water heating

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