CN103196262A - Hot gas bypass defrosting device for air source heat pump water heater - Google Patents
Hot gas bypass defrosting device for air source heat pump water heater Download PDFInfo
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- CN103196262A CN103196262A CN2013101375857A CN201310137585A CN103196262A CN 103196262 A CN103196262 A CN 103196262A CN 2013101375857 A CN2013101375857 A CN 2013101375857A CN 201310137585 A CN201310137585 A CN 201310137585A CN 103196262 A CN103196262 A CN 103196262A
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Abstract
The invention discloses a hot gas bypass defrosting device for an air source heat pump water heater. The hot gas bypass defrosting device for the air source heat pump water heater comprises the air source heat pump water heater and the hot gas bypass defrosting device. The air source heat pump water heater mainly comprises a compressor (1), a heating magnetic valve (2), a water side heat exchanger (3), a reservoir (4), a dry filter (5), an expansion valve (7), an air side heat exchanger (10), a gas-liquid separator (14), an air-returning magnetic valve (15) and a high-low voltage control switch (20); and the hot gas bypass defrosting device mainly comprises a hot gas bypass magnetic valve (18), a one-way valve (8), an air-returning bypass magnetic valve (13), a throttle mechanism (16) and a refrigerant heater (17). The hot gas bypass magnetic valve and the one-way valve are arranged on a tube arranged between the air discharge port of the compressor and the liquid inlet port of the air side heat exchanger, an air-returning bypass pipeline and the refrigerant heater are further arranged between the liquid outlet port of the air side heat exchanger and the liquid inlet port of the gas-liquid separator, and the air-returning bypass magnetic valve and the throttle mechanism are connected on the air-returning bypass pipeline. Working condition of the compressor under low temperature can be improved, and safety and stability of overall operation of the heat pump water heater can be effectively improved.
Description
Technical field
The present invention relates to the air source heat pump defrosting technical field, especially is the hot-gas bypass defroster of air source hot pump water heater.
Background technology
Air source heat pump is as a kind of pumping installations of heat, and it utilizes the thermodynamic cycle of cold-producing medium, absorbs heat from air, and realizes the transfer of heat.Along with the continuous development and perfection of heat pump techniques, air source heat pump is widely used in industries such as air conditioner refrigerating, heating hot water.But when air source heat pump moves under the low temperature environment in the winter time, according to the heat transfer law, refrigerant in the evaporimeter will absorb heat from environment, then evaporating temperature must be lower than outdoor environment temperature, when the finned tube surface temperature is lower than the air dew point temperature, airborne steam just can condense, and when this temperature was lower than 0 ℃, condensation just was deposited in the finned tube surface with loose ice crystal form and forms the frost layer.The frosting initial stage, because frosting has increased roughness and the surface area of heating surface, and total heat transfer coefficient is increased to some extent, but along with the progressive additive of frost layer, the resistance that air flows through finned tube increases, air mass flow reduces, and causes the evaporation of finned tube inner refrigerant insufficient, and evaporating temperature reduces, the evaporator outlet degree of superheat reduces, refrigerant flow reduces, and the heating capacity decay causes compressor fault when serious.Therefore, heat pump normal, stable operation under low temperature environment be guaranteed, the defrosting problem of unit must be considered.At present, the most frequently used Defrost mode of air source hot pump water heater has two kinds: reverse cycle defrosting and hot-gas bypass defrosting.
Reverse cycle defrosting: this Defrost method passes through four-way change-over valve, change the flow direction of cold-producing medium, the high temperature and high pressure steam that compressor is discharged commutates by cross valve, enters into evaporimeter and defrosts, when evaporator coil temperature rose to a certain temperature value, defrosting finished.This Defrost mode; can have influence on the water supply of Teat pump boiler; namely during defrosting, can't provide the hot water of effective water temperature for the user, simultaneously through after the defrosting; original hot water temperature can reduce; from energy point of view, the loss of this defrost process is equivalent to the shutdown of twice defrosting time; in addition, cross valve frequently commutates can influence its life-span and reliability.
The hot-gas bypass defrosting: this Defrost method does not change the flow direction of cold-producing medium, and unit keeps heating duty in defrost process constant, and the direct bypass part of high-temperature gas that compressor is discharged is carried out defrosting to evaporimeter.This kind defrosting mode is because the heat of high-pressure side refrigerant still comes from the heat that absorbs in the evaporimeter, when temperature is lower, when defrosting is fast inadequately, will not have enough heat absorption, can make main frame enter protectiveness and shut down.As adopt simple bypass, then easily produce the liquid hit phenomenon of compressor.Simultaneously, in defrost process, because the compressor air-discharging amount reduces, the effect of heat hot water can be influenced, the demand of the normal heat water yield can't be satisfied.
Summary of the invention
The objective of the invention is the deficiency at above-mentioned Defrost method existence, propose a kind of air source heat pump hot water
Device hot-gas bypass defroster.This defroster improves the working condition under the compressor low temperature environment by improving compressor air suction temperature and pressure, does not influence the hot water water temperature in defrost process, has effectively improved security and the stability of Teat pump boiler unit overall operation.
For achieving the above object, the technical solution used in the present invention is: a kind of air source hot pump water heater hot-gas bypass defroster, comprise mainly by compressor, heat magnetic valve, water-side heat, reservoir, device for drying and filtering, expansion valve, air-side heat exchanger, gas-liquid separator, the air source hot pump water heater that return-air magnetic valve and dual pressure control switch are formed, and mainly by hot gas bypass solenoid valve, check valve, the return-air bypass solenoid valve, the defrosting throttle mechanism, the hot-gas bypass defroster that the refrigerant heater is formed, wherein: hot gas bypass valve and check valve are arranged on the pipeline between described exhaust outlet of compressor and the described air-side heat exchanger inlet; Between the inlet of the liquid outlet of described air-side heat exchanger and described gas-liquid separator, increase return-air bypass line and refrigerant heater, and connect return-air bypass solenoid valve and throttle mechanism at this return-air bypass line.
The present invention is fin-tube heat exchanger at described air-side heat exchanger, and fin is provided with the fin temperature sensor.
The present invention is plate type heat exchanger or double pipe heat exchanger at described water-side heat.
Throttle mechanism of the present invention is expansion valve or capillary.
Beneficial effect of the present invention is:
1) compares with conventional heat pump, between air-side heat exchanger outlet and gas-liquid separator import, increase return-air bypass line and defrosting throttle mechanism, the back condensed refrigerant liquid that defrosts is carried out the throttling step-down, be conducive to the evaporation of follow-up liquid refrigerant;
2) increase the refrigerant heater, cold-producing medium has been carried out heat compensation, shortened the defrosting required time greatly; And the power of refrigerant heater can be regulated, and can regulate for the demand of heat according to system defrosting, realizes energy saving and improves the utilization ratio of heat.
3) this defroster passes through to improve compressor air suction temperature and pressure, and prevents compressor air suction band liquid, improves the working condition under the compressor low temperature environment, effectively improves security and the stability of Teat pump boiler unit overall operation.The defrost process compressor is not shut down, and defrosting time is short, effective, and defrost process does not influence the water heater temperature.
Description of drawings
Fig. 1 is structure principle chart of the present invention.
Among the figure: 1, compressor, 2, heat magnetic valve, 3, water-side heat, 4, reservoir, 5, device for drying and filtering, 6, liquid-sighting glass, 7, expansion valve, 8, check valve, 9, the fin temperature sensor, 10, air-side heat exchanger, 11, axial flow blower, 12, environment temperature sensor, 13, the return-air bypass solenoid valve, 14, gas-liquid separator, 15, return-air magnetic valve, 16, defrosting throttle mechanism, 17, the refrigerant heater, 18, hot gas bypass solenoid valve, 19, suction temperature sensor, 20, dual pressure control switch, 21, the height Pressure gauge, 22, exhaust gas temperature sensor.
The specific embodiment
The present invention is described in further detail below in conjunction with accompanying drawing, but the present invention does not limit to following examples.
As shown in Figure 1: the described air source hot pump water heater hot-gas bypass of present embodiment defroster is mainly by compressor 1 existing, heat magnetic valve 2, water-side heat 3, reservoir 4, device for drying and filtering 5, liquid-sighting glass 6, expansion valve 7, air-side heat exchanger 10, axial flow blower 11, gas-liquid separator 14, return-air magnetic valve 15, suction temperature sensor 19, dual pressure control switch 20, height Pressure gauge 21, on the architecture basics of the air source hot pump water heater that exhaust gas temperature sensor 22 is formed, also be provided with mainly by hot gas bypass solenoid valve 18, check valve 8, fin temperature sensor 9, environment temperature sensor 12, return-air bypass solenoid valve 13, defrosting throttle mechanism 16, the hot-gas bypass defroster that refrigerant heater 17 is formed.Wherein: hot gas bypass valve 18 and check valve 8 are arranged on the pipeline between compressor 1 exhaust outlet and air-side heat exchanger 10 inlets, and hot gas bypass valve 18 is positioned at the exhaust port side of compressor 1, and check valve 8 is positioned at air-side heat exchanger 10 inlet ends.Between air-side heat exchanger 10 liquid outlets and gas-liquid separator 14 inlets, increase return-air bypass line and refrigerant heater 17, and be connected with return-air bypass solenoid valve 13 and defrosting throttle mechanism 16 at the return-air bypass line.Fin temperature sensor 9 is arranged on the air-side heat exchanger 10 centre position fins, and environment temperature sensor 12 is arranged on the unit side housing.By fin temperature and the environment temperature of feedback, judge the frosting situation, and then the start and stop of control defrosting program.Refrigerant heater 17(separate case applies for a patent), what defrosting throttle mechanism 16 adopted is expansion valve or capillary (the expansion valve adjustable range is relatively large, but the capillary cost is lower, can select for use as the case may be in the practical application).
Air source hot pump water heater is when operate as normal, by compressor 1, heat magnetic valve 2, water-side heat 3, reservoir 4, device for drying and filtering 5, liquid-sighting glass 6, expansion valve 7, air-side heat exchanger 10, axial flow blower 11, return-air magnetic valve 15, refrigerant heater 17, gas-liquid separator 14 and pipeline thereof and constitute loop.Circulation process is: compressor 1-heat magnetic valve 2-water-side heat 3-reservoir 4-device for drying and filtering 5-liquid-sighting glass 6-expansion valve 7-air-side heat exchanger 10 and axial flow blower 11-return-air magnetic valve 15-refrigerant heater 17-gas-liquid separator 14-compressor 1.At this moment, heat magnetic valve 2 and open, hot gas bypass solenoid valve 18 is closed; Return-air magnetic valve 15 is opened, and return-air bypass solenoid valve 13 is closed; Refrigerant heater 17 does not start.
Air source hot pump water heater constitutes defrost circuit by compressor 1, hot gas bypass solenoid valve 18, check valve 8, air-side heat exchanger 10, return-air bypass solenoid valve 13, throttle mechanism 16 and refrigerant heater 17 and pipeline thereof when defrosting.During Defrost operation, circulation process is: compressor 1-hot gas bypass solenoid valve 18-check valve 8-air-side heat exchanger 10-return-air bypass solenoid valve 13-throttle mechanism 16-refrigerant heating tube 17-gas-liquid separator 14-compressor 1.At this moment, hot gas bypass solenoid valve 18 is opened, and heats magnetic valve 2 and closes; Return-air bypass solenoid valve 13 is opened, return-air magnetic valve 15 cuts out; Compressor 1 high-temperature exhaust air directly enters air-side heat exchanger 10 defrostings, the refrigerant liquid that the defrosting back forms, the return-air bypass solenoid valve 13 of flowing through, and through throttle mechanism 16 throttling step-downs, refrigerant heater 17 starts, and makes liquid refrigerant be converted into gaseous state, and carries out heat compensation, finally enter gas-liquid separator 14 and get back to compressor 1, finish defrost cycle.
Claims (4)
1. air source hot pump water heater hot-gas bypass defroster, comprise mainly by compressor (1), heat magnetic valve (2), water-side heat (3), reservoir (4), device for drying and filtering (5), expansion valve (7), air-side heat exchanger (10), gas-liquid separator (14), the air source hot pump water heater that return-air magnetic valve (15) and dual pressure control switch (20) are formed, it is characterized in that: also be provided with mainly by hot gas bypass solenoid valve (18), check valve (8), return-air bypass solenoid valve (13), throttle mechanism (16), the hot-gas bypass defroster that refrigerant heater (17) is formed, wherein: hot gas bypass valve and check valve are arranged on the pipeline between described exhaust outlet of compressor and the described air-side heat exchanger inlet; Between the inlet of the liquid outlet of described air-side heat exchanger and described gas-liquid separator, increase return-air bypass line and refrigerant heater, and connect return-air bypass solenoid valve (13) and throttle mechanism (16) at this return-air bypass line.
2. air source hot pump water heater hot-gas bypass defroster according to claim 1, it is characterized in that: described air-side heat exchanger (10) is provided with fin temperature sensor (9) for fin-tube heat exchanger and fin.
3. air source hot pump water heater hot-gas bypass defroster according to claim 1 is characterized in that: be plate type heat exchanger or double pipe heat exchanger at described water-side heat (3).
4. air source hot pump water heater hot-gas bypass defroster according to claim 1, it is characterized in that: (the expansion valve adjustable range is relatively large for expansion valve or capillary for described throttle mechanism (16), but the capillary cost is lower, can select for use as the case may be in the practical application).
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| CN2013101375857A CN103196262A (en) | 2013-04-19 | 2013-04-19 | Hot gas bypass defrosting device for air source heat pump water heater |
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| CN2013101375857A CN103196262A (en) | 2013-04-19 | 2013-04-19 | Hot gas bypass defrosting device for air source heat pump water heater |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104482651A (en) * | 2014-12-31 | 2015-04-01 | 昆山台佳机电有限公司 | Air source heat pump water heating unit and defrosting control method thereof |
| CN104848617A (en) * | 2015-06-08 | 2015-08-19 | 上海海立睿能环境技术有限公司 | Defrosting system of carbon dioxide heat pump water heater |
| CN105222437A (en) * | 2015-10-28 | 2016-01-06 | 常熟理工学院 | The defroster of air source hot pump water heater evaporimeter |
| CN105526751A (en) * | 2014-09-30 | 2016-04-27 | 瑞智精密股份有限公司 | Heat exchange system with automatic defrosting function |
| CN105910386A (en) * | 2016-06-06 | 2016-08-31 | 洛阳普瑞曼自动控制技术有限公司 | Intelligent petroleum benzine conversion device |
| CN107166720A (en) * | 2017-05-25 | 2017-09-15 | 泰豪科技股份有限公司 | A kind of heat pump water-heating machine defrosting control system device |
| CN107270587A (en) * | 2017-07-17 | 2017-10-20 | 协鑫电力设计研究有限公司 | A kind of air source heat pump anti-caking defrosting system combined with photovoltaic |
| CN107461962A (en) * | 2017-08-17 | 2017-12-12 | 天津大学 | Air source heat pump defrosting system and method based on image procossing and hot-gas bypass |
| CN109631381A (en) * | 2018-11-09 | 2019-04-16 | 青岛沃润达新能源科技有限公司 | A kind of vortex type air source heat pump system of the simultaneous refrigeration of heating |
| CN110595122A (en) * | 2018-06-12 | 2019-12-20 | 浙江盾安机电科技有限公司 | Defrosting control method, device and system for heat pump |
| CN110595093A (en) * | 2019-09-30 | 2019-12-20 | 海信（广东）空调有限公司 | Air conditioning system |
| CN111023564A (en) * | 2019-11-18 | 2020-04-17 | Tcl空调器(中山)有限公司 | Heat pump system, control method thereof and air source heat pump water heater |
| CN111503825A (en) * | 2020-04-29 | 2020-08-07 | 广东美的制冷设备有限公司 | Control method of air conditioning system and air conditioning system |
| CN112432382A (en) * | 2020-12-10 | 2021-03-02 | 珠海格力电器股份有限公司 | Heat pump unit and control method thereof |
| CN114812024A (en) * | 2022-05-06 | 2022-07-29 | 青岛海信日立空调系统有限公司 | Air conditioner and defrosting method thereof |
| CN115717787A (en) * | 2022-11-09 | 2023-02-28 | 珠海格力电器股份有限公司 | Air conditioner control method and device and air conditioner |
| WO2023103968A1 (en) * | 2021-12-07 | 2023-06-15 | 青岛海信日立空调系统有限公司 | Air source heat pump system |
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| CN203286825U (en) * | 2013-05-15 | 2013-11-13 | 东南大学 | Defrosting device of air source heat pump |
| CN203323465U (en) * | 2013-04-19 | 2013-12-04 | 洛阳中懋环保设备有限公司 | Hot-air bypass defrosting device of air source heat pump water heater |
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| JP2002228258A (en) * | 2001-02-06 | 2002-08-14 | Toshiba Kyaria Kk | Heat pump water heater |
| CN2886463Y (en) * | 2006-04-19 | 2007-04-04 | 东南大学 | Defrosting apparatus for air-source heat pump water chiller-heater unit |
| CN203323465U (en) * | 2013-04-19 | 2013-12-04 | 洛阳中懋环保设备有限公司 | Hot-air bypass defrosting device of air source heat pump water heater |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105526751A (en) * | 2014-09-30 | 2016-04-27 | 瑞智精密股份有限公司 | Heat exchange system with automatic defrosting function |
| CN104482651A (en) * | 2014-12-31 | 2015-04-01 | 昆山台佳机电有限公司 | Air source heat pump water heating unit and defrosting control method thereof |
| CN104482651B (en) * | 2014-12-31 | 2018-06-15 | 昆山台佳机电有限公司 | A kind of air friction drag and its defrosting control method |
| CN104848617A (en) * | 2015-06-08 | 2015-08-19 | 上海海立睿能环境技术有限公司 | Defrosting system of carbon dioxide heat pump water heater |
| CN105222437A (en) * | 2015-10-28 | 2016-01-06 | 常熟理工学院 | The defroster of air source hot pump water heater evaporimeter |
| CN105910386A (en) * | 2016-06-06 | 2016-08-31 | 洛阳普瑞曼自动控制技术有限公司 | Intelligent petroleum benzine conversion device |
| CN107166720A (en) * | 2017-05-25 | 2017-09-15 | 泰豪科技股份有限公司 | A kind of heat pump water-heating machine defrosting control system device |
| CN107270587A (en) * | 2017-07-17 | 2017-10-20 | 协鑫电力设计研究有限公司 | A kind of air source heat pump anti-caking defrosting system combined with photovoltaic |
| CN107461962A (en) * | 2017-08-17 | 2017-12-12 | 天津大学 | Air source heat pump defrosting system and method based on image procossing and hot-gas bypass |
| CN110595122A (en) * | 2018-06-12 | 2019-12-20 | 浙江盾安机电科技有限公司 | Defrosting control method, device and system for heat pump |
| CN110595122B (en) * | 2018-06-12 | 2022-03-08 | 浙江盾安机电科技有限公司 | Defrosting control method, device and system for heat pump |
| CN109631381A (en) * | 2018-11-09 | 2019-04-16 | 青岛沃润达新能源科技有限公司 | A kind of vortex type air source heat pump system of the simultaneous refrigeration of heating |
| CN110595093A (en) * | 2019-09-30 | 2019-12-20 | 海信（广东）空调有限公司 | Air conditioning system |
| CN111023564A (en) * | 2019-11-18 | 2020-04-17 | Tcl空调器(中山)有限公司 | Heat pump system, control method thereof and air source heat pump water heater |
| CN111023564B (en) * | 2019-11-18 | 2022-05-06 | Tcl空调器(中山)有限公司 | Heat pump system control method and air source heat pump water heater |
| CN111503825A (en) * | 2020-04-29 | 2020-08-07 | 广东美的制冷设备有限公司 | Control method of air conditioning system and air conditioning system |
| CN112432382A (en) * | 2020-12-10 | 2021-03-02 | 珠海格力电器股份有限公司 | Heat pump unit and control method thereof |
| WO2023103968A1 (en) * | 2021-12-07 | 2023-06-15 | 青岛海信日立空调系统有限公司 | Air source heat pump system |
| CN114812024A (en) * | 2022-05-06 | 2022-07-29 | 青岛海信日立空调系统有限公司 | Air conditioner and defrosting method thereof |
| CN114812024B (en) * | 2022-05-06 | 2023-11-07 | 青岛海信日立空调系统有限公司 | Air conditioner and defrosting method thereof |
| CN115717787A (en) * | 2022-11-09 | 2023-02-28 | 珠海格力电器股份有限公司 | Air conditioner control method and device and air conditioner |
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Application publication date: 20130710 |