CN103574860A - Air conditioner defrosting circulation system - Google Patents
Air conditioner defrosting circulation system Download PDFInfo
- Publication number
- CN103574860A CN103574860A CN201210267469.2A CN201210267469A CN103574860A CN 103574860 A CN103574860 A CN 103574860A CN 201210267469 A CN201210267469 A CN 201210267469A CN 103574860 A CN103574860 A CN 103574860A
- Authority
- CN
- China
- Prior art keywords
- heat exchanger
- compressor
- heat
- water tank
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention provides an air conditioner defrosting circulation system comprising a compressor. A compressor exhaust pipe is connected with a four-way valve which is connected with an outdoor heat exchanger, an indoor heat exchanger and a gas-liquid separator, the gas-liquid separator is connected with a compressor intake pipe, a heat storage water tank is arranged on the compressor exhaust pipe, and a water spray port of the heat storage water tank is formed in the outdoor heat exchanger and matched with a return pipe of a water storage tank. The four-way valve is not switched, but the heat-preservation heat storage water tank is arranged on the compressor exhaust pipe to collect waste heat during circulation and fully utilize the waste heat, an outdoor unit is defrosted by a hot water spraying mode, normal heating of an indoor unit is guaranteed in the whole defrosting process, heating efficiency is improved effectively, and service life of the system is prolonged.
Description
Technical field
The present invention relates to a kind of air-conditioning system, the air conditioner circulating system that specifically adopts heat water-spraying's mode to defrost for air-conditioning.
Background technology
Air-conditioning system is when heating operation, if outdoor environment is lower, system evaporating temperature is lower, and the temperature on outdoor heat exchanger copper tube and fin surface is during lower than 0 ℃, and airborne moisture will be in fin surface frosting.Along with thickening of frost layer, increased on the one hand heat transfer resistance, also increased on the other hand the windage of heat exchanger, the air quantity of outdoor heat exchanger can reduce gradually, the increase of thermal resistance and windage all can affect outdoor evaporation endothermic amount, thereby the large high attenuation of the heating capacity of system meeting, just must operation defrosting mode when frost thickness reaches certain value.
General Defrost method is to commutate by cross valve at present, and the cold-producing medium of HTHP is directly entered in outdoor heat exchanger, to frost layer heating, makes its thawing.
Specifically systemic circulation is as shown in Figure 1:
During operation heating mode, cross valve ON, the high temperature and high pressure gas that compressor is discharged enters indoor heat exchanger condensation heat release by cross valve, indoor set blows out hot blast, and the cold refrigerant liquid of mistake after condensation heat release enters throttling arrangement (capillary or electric expansion valve), becomes the gas-fluid two-phase mixture of low-temp low-pressure after reducing pressure by regulating flow, mixture enters after outdoor heat exchanger evaporation endothermic, through gas-liquid separator, finally get back to compressor, complete one and heat circulation.
During operation defrosting mode, cross valve OFF, outdoor heat exchanger fan OFF, indoor heat exchanger fan OFF or gentle breeze, the cold-producing medium that compressor is discharged is high temperature and high pressure gas state, in the laggard copper pipe that enters outdoor heat exchanger of cross valve, carries out exchange heat with the frost layer of copper pipe surface, and by it thawing, realize the function of defrost; Cold-producing medium after heat release becomes subcooled liquid and enters that throttling arrangement reducing pressure by regulating flow is laggard to be entered in indoor heat exchanger, due to now indoor heat exchanger fan OFF or gentle breeze, so cold-producing medium can only absorb heat seldom in indoor heat exchanger, the cold-producing medium that flows out indoor heat exchanger is substantially all liquid condition, after being back to gas-liquid separator, by compressor, sucked, complete a defrost cycle.
Existing Defrost mode can be realized defrosting function preferably, but still has the following disadvantages and shortcoming:
While 1, moving defrosting mode, indoor set cannot go out hot blast, if the longer indoor temperature of defrosting time easily produces larger fluctuation.
2, in cross valve when conversion, impacts greatlyr to valve body, affects cross valve service life.
When 3, cross valve conversion defrosts, indoor set heat exchanger becomes low-temp low-pressure from the state-transition of HTHP, and outdoor unit heat exchanger converts high-temperature high-pressure state to from the state of low-temp low-pressure, after defrosting finishes, has just in time contrary transformation.This transition process has been lost a large amount of energy.The heating capacity that has lost system, has increased power consumption, is unfavorable for energy-conservation.
4, when defrosting cannot heat exchange due to low-pressure side, and a large amount of refrigerant liquids is gathered in gas-liquid separator, and compressor exists the hidden danger of liquid hammer, and system low-voltage pressure can be very low, may surpass the range of operation of compressor, and compressor is produced to infringement.
5, after defrosting finishes, indoor heat exchanger slowly rises to high pressure from low pressure, and now indoor set is in anti-cold wind state, need to continue the regular hour just can blow out hot blast.
6, in defrost process, due to indoor fan stall, low-pressure side absorbs heat nowhere, and heat exchange is carried out in the HTHP exhaust that enters the gas absorbing liquid meeting of cross valve and enter cross valve, affects defrosting effect.
Summary of the invention
The deficiency existing for prior art, technical problem to be solved by this invention is, a kind of air-conditioner defrosting circulatory system is provided, do not switch cross valve, but by an insulation heat storage water tank is set on compressor air-discharging pipeline, collect the waste heat in cyclic process and make full use of, the mode that adopts heat water-spraying is to the off-premises station processing that defrosts, whole defrost process indoor set normally heats, and effectively improves heating efficiency, extends system service life simultaneously.
For solving the problems of the technologies described above, the technical solution used in the present invention is, a kind of air-conditioner defrosting circulatory system, comprise compressor, compressor exhaust pipe connects cross valve, cross valve junction chamber external heat exchanger, indoor heat exchanger, gas-liquid separator, gas-liquid separator connects compressor inleting pipe, heat storage water tank is set on compressor exhaust pipe, and the water jet of heat storage water tank is arranged on outdoor heat exchanger, and water jet matches with the return duct of storage tank.
The above-mentioned air-conditioner defrosting circulatory system, arranges heat exchange coil on its compressor exhaust pipe, and heat exchange coil is placed in heat storage water tank.
The above-mentioned air-conditioner defrosting circulatory system, arranges water circulating pump between its heat storage water tank and water jet.
The above-mentioned air-conditioner defrosting circulatory system, arranges drip tray on its backflow water pipe, and water jet matches with drip tray.
The above-mentioned air-conditioner defrosting circulatory system, its water jet is arranged on outdoor heat exchanger top, and drip tray is arranged on outdoor heat exchanger below, and water jet matches with drip tray.
Tool of the present invention has the following advantages and useful technique effect:
1, the present invention operation during defrosting mode without switching cross valve, but heat storage water tank is set on compressor exhaust pipe, utilize blast pipe heat release to improve the water temperature in storage tank, then adopt heat water-spraying to carry out defrost processing to outdoor heat exchanger; This mode can guarantee that air-conditioning system indoor set during defrosting normally heats running; And outdoor heat exchanger is heated in defrost process simultaneously, can significantly improve the heating efficiency of air-conditioning system integral body.
2, the present invention, by heat exchange coil is set, more effectively utilizes blast pipe heat release to improve the water temperature in heat storage water tank; The pressure that water circulating pump increases heat water-spraying is set, further improves defrosting efficiency and controllability; Drip tray is set and matches with water jet, be more convenient to the collection of flowing water, make hot water in spray can be back to heat storage water tank rapidly after defrost, participate in circulation.
3, in running of the present invention, heat exchanger does not have high-low pressure to switch outside indoor set, compares with common Defrost mode of the prior art, can not cause and energy loss effectively not improve heating energy efficiency ratio because high-low pressure switches.
4, the invention enables air-conditioning system in the course of the work, without the frequent cross valve that switches, greatly extend the service life of cross valve, meanwhile, in defrost process, the low-pressure side of compressor has heat to suck, compressor operating is more safe and reliable, thereby in the service life that extends air-conditioning system integral body, reduce costs economical environment-protective.
Accompanying drawing explanation
The common Defrost mode systemic circulation of Fig. 1 schematic diagram;
Fig. 2 systemic circulation schematic diagram of the present invention.
In above-mentioned figure:
1-outdoor heat exchanger, 2-cross valve, 3-electric expansion valve, 4-indoor heat exchanger, 5-gas-liquid separator, 6-compressor, 7-water circulating pump, 8-heat storage water tank, 9-heat exchange coil, 10-water jet, 11-drip tray, 12-blast pipe, 13-air inlet pipe, 14-backflow water pipe.
The specific embodiment
As shown in Figure 2, the air-conditioner defrosting circulatory system of the present invention, comprise compressor 6, the blast pipe 12 of compressor 6 connects cross valve 2, cross valve 2 junction chamber external heat exchangers 1, indoor heat exchanger 4, gas-liquid separator 5, gas-liquid separator 5 connects the air inlet pipe 13 of compressor 6, on compressor 6 blast pipes 12, heat storage water tank 8 is set, on compressor 6 blast pipes 12, heat exchange coil 9 is set, heat exchange coil 9 is placed in heat storage water tank 8, the water jet 10 of heat storage water tank 8 is arranged on outdoor heat exchanger 1, between heat storage water tank 8 and water jet 10, water circulating pump 7 is set, drip tray 11 is set on backflow water pipe 14, water jet 10 is arranged on outdoor heat exchanger 1 top, drip tray 11 is arranged on outdoor heat exchanger 1 below, water jet 10 matches with drip tray 11.
During operation heating mode: the high-temperature high-pressure refrigerant steam that compressor 6 is discharged constantly heats the water in heat storage water tank 8 by the heat exchange coil 9 on blast pipe 12, heating process is just utilized exhaust sensible heat, refrigerant vapour is that temperature decreases, not condensation, the refrigerant vapour that heat exchange coil 9 flows out from heat storage water tank 8 enters in cross valve 2, cross valve 2 is ON, refrigerant vapour is flowed through, and cross valve 2 is laggard enters indoor heat exchanger 4, condensation heat release in indoor heat exchanger 4, indoor set blows out hot blast thus, cold-producing medium changed cold refrigerant liquid into after indoor heat exchanger 4 condensation heat releases, refrigerant liquid enters heat absorption evaporation in outdoor heat exchanger 1 through throttling arrangement reducing pressure by regulating flow is laggard, enter again in gas-liquid separator 5, by compressor 6, sucked, complete one and heat circulation.
During operation defrosting mode: when the temperature sensor judgement system by outdoor heat exchanger 1 need to enter defrosting mode, outdoor fan is closed, open valve or the water circulating pump of heat storage water tank 8, hot water arrives and is arranged in the water jet 10 on outdoor heat exchanger 1, heat water-spraying defrosts to outdoor heat exchanger 1 copper tube and fin surface, now air-conditioning system still runs well and heats circulation, indoor set still blows out hot blast, after temperature sensor judgement defrosting finishes, close heat storage water tank 8 valves or stop water circulating pump running, complete defrost process.
The above, be only to preferred embodiment of the present invention, is not that the present invention is done to other forms of restriction, and any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every the present invention program's content that do not depart from, to any simple modification made for any of the above embodiments, equivalent variations and remodeling, still belongs to protection scope of the present invention according to technical spirit of the present invention.
Claims (5)
1. the air-conditioner defrosting circulatory system, comprise compressor, compressor exhaust pipe connects cross valve, cross valve junction chamber external heat exchanger, indoor heat exchanger, gas-liquid separator, gas-liquid separator connects compressor inleting pipe, it is characterized in that: heat storage water tank is set on compressor exhaust pipe, and the water jet of heat storage water tank is arranged on outdoor heat exchanger, water jet matches with the return duct of storage tank.
2. the air-conditioner defrosting circulatory system according to claim 1, is characterized in that: on described compressor exhaust pipe, heat exchange coil is set, heat exchange coil is placed in heat storage water tank.
3. the air-conditioner defrosting circulatory system according to claim 1, is characterized in that: between described heat storage water tank and water jet, water circulating pump is set.
4. the air-conditioner defrosting circulatory system according to claim 1, is characterized in that: on described backflow water pipe, drip tray is set, water jet matches with drip tray.
5. the air-conditioner defrosting circulatory system according to claim 4, is characterized in that: described water jet is arranged on outdoor heat exchanger top, and drip tray is arranged on outdoor heat exchanger below, and water jet matches with drip tray.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210267469.2A CN103574860A (en) | 2012-07-30 | 2012-07-30 | Air conditioner defrosting circulation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210267469.2A CN103574860A (en) | 2012-07-30 | 2012-07-30 | Air conditioner defrosting circulation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103574860A true CN103574860A (en) | 2014-02-12 |
Family
ID=50047195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210267469.2A Pending CN103574860A (en) | 2012-07-30 | 2012-07-30 | Air conditioner defrosting circulation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103574860A (en) |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105066529A (en) * | 2015-08-13 | 2015-11-18 | 珠海格力电器股份有限公司 | Heat pump unit |
| CN106016875A (en) * | 2016-07-14 | 2016-10-12 | 天津商业大学 | Compressor waste heat recycling type hot water defrosting refrigeration system |
| CN106545926A (en) * | 2017-01-10 | 2017-03-29 | 美的集团武汉制冷设备有限公司 | Air-conditioner |
| CN109028521A (en) * | 2018-10-09 | 2018-12-18 | 珠海格力电器股份有限公司 | Air-conditioning duct water cover, air-conditioning system and air conditioner |
| CN110701731A (en) * | 2019-11-14 | 2020-01-17 | 宁波奥克斯电气股份有限公司 | Air conditioner defrosting system, air conditioner defrosting method and air conditioner |
| CN111561791A (en) * | 2020-06-12 | 2020-08-21 | 格瑞智慧人居环境科技(江苏)有限公司 | Air-cooled heat pump system for defrosting solution and control method thereof |
| CN112050361A (en) * | 2019-06-06 | 2020-12-08 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050355A (en) * | 2019-06-06 | 2020-12-08 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050357A (en) * | 2019-06-06 | 2020-12-08 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050364A (en) * | 2019-06-06 | 2020-12-08 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050358A (en) * | 2019-06-06 | 2020-12-08 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050366A (en) * | 2019-06-06 | 2020-12-08 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050363A (en) * | 2019-06-06 | 2020-12-08 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050354A (en) * | 2019-06-06 | 2020-12-08 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050350A (en) * | 2019-06-06 | 2020-12-08 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050365A (en) * | 2019-06-06 | 2020-12-08 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050359A (en) * | 2019-06-06 | 2020-12-08 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN113834135A (en) * | 2020-06-23 | 2021-12-24 | 宁波奥克斯电气股份有限公司 | Air conditioner |
| CN113915800A (en) * | 2021-09-27 | 2022-01-11 | 河南科技大学 | High-temperature double-source heat pump device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101144669A (en) * | 2007-10-30 | 2008-03-19 | 东南大学 | Air source heat pump ultrasound wave defrosting system |
| JP2008281274A (en) * | 2007-05-10 | 2008-11-20 | Chugoku Electric Power Co Inc:The | Heat pump type hot water generator, and operating method of heat pump type hot water generator |
| CN101498498A (en) * | 2009-01-05 | 2009-08-05 | 东莞市康源节能科技有限公司 | Three-purpose heat pump water heating machine and its control method |
| CN201448953U (en) * | 2009-08-20 | 2010-05-05 | 张华林 | Air-cooled type small and medium-sized central air-conditioner water chiller-heater unit |
| CN201706831U (en) * | 2010-05-25 | 2011-01-12 | 天津大学 | Energy-saving constant-temperature constant-humid preserving refrigeratory system |
| CN201731677U (en) * | 2010-03-15 | 2011-02-02 | 浙江地源能源环境有限公司 | Air source heat pump for spray cooling and hot water defrosting |
| CN202853065U (en) * | 2012-07-30 | 2013-04-03 | 青岛海信日立空调***有限公司 | Air conditioner defrosting circulation system |
-
2012
- 2012-07-30 CN CN201210267469.2A patent/CN103574860A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008281274A (en) * | 2007-05-10 | 2008-11-20 | Chugoku Electric Power Co Inc:The | Heat pump type hot water generator, and operating method of heat pump type hot water generator |
| CN101144669A (en) * | 2007-10-30 | 2008-03-19 | 东南大学 | Air source heat pump ultrasound wave defrosting system |
| CN101498498A (en) * | 2009-01-05 | 2009-08-05 | 东莞市康源节能科技有限公司 | Three-purpose heat pump water heating machine and its control method |
| CN201448953U (en) * | 2009-08-20 | 2010-05-05 | 张华林 | Air-cooled type small and medium-sized central air-conditioner water chiller-heater unit |
| CN201731677U (en) * | 2010-03-15 | 2011-02-02 | 浙江地源能源环境有限公司 | Air source heat pump for spray cooling and hot water defrosting |
| CN201706831U (en) * | 2010-05-25 | 2011-01-12 | 天津大学 | Energy-saving constant-temperature constant-humid preserving refrigeratory system |
| CN202853065U (en) * | 2012-07-30 | 2013-04-03 | 青岛海信日立空调***有限公司 | Air conditioner defrosting circulation system |
Cited By (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105066529A (en) * | 2015-08-13 | 2015-11-18 | 珠海格力电器股份有限公司 | Heat pump unit |
| CN106016875A (en) * | 2016-07-14 | 2016-10-12 | 天津商业大学 | Compressor waste heat recycling type hot water defrosting refrigeration system |
| CN106545926A (en) * | 2017-01-10 | 2017-03-29 | 美的集团武汉制冷设备有限公司 | Air-conditioner |
| CN109028521A (en) * | 2018-10-09 | 2018-12-18 | 珠海格力电器股份有限公司 | Air-conditioning duct water cover, air-conditioning system and air conditioner |
| CN112050350A (en) * | 2019-06-06 | 2020-12-08 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050365A (en) * | 2019-06-06 | 2020-12-08 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050361A (en) * | 2019-06-06 | 2020-12-08 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050355A (en) * | 2019-06-06 | 2020-12-08 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050357A (en) * | 2019-06-06 | 2020-12-08 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050364A (en) * | 2019-06-06 | 2020-12-08 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050358A (en) * | 2019-06-06 | 2020-12-08 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050366A (en) * | 2019-06-06 | 2020-12-08 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050363A (en) * | 2019-06-06 | 2020-12-08 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050354A (en) * | 2019-06-06 | 2020-12-08 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050365B (en) * | 2019-06-06 | 2022-08-19 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050364B (en) * | 2019-06-06 | 2022-08-19 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050359A (en) * | 2019-06-06 | 2020-12-08 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050355B (en) * | 2019-06-06 | 2022-07-19 | 重庆海尔空调器有限公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050361B (en) * | 2019-06-06 | 2022-07-19 | 重庆海尔空调器有限公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050357B (en) * | 2019-06-06 | 2022-07-19 | 重庆海尔空调器有限公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050358B (en) * | 2019-06-06 | 2022-07-19 | 合肥海尔空调器有限公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050359B (en) * | 2019-06-06 | 2022-07-19 | 郑州海尔空调器有限公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN112050350B (en) * | 2019-06-06 | 2022-07-19 | 郑州海尔空调器有限公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN110701731A (en) * | 2019-11-14 | 2020-01-17 | 宁波奥克斯电气股份有限公司 | Air conditioner defrosting system, air conditioner defrosting method and air conditioner |
| CN111561791A (en) * | 2020-06-12 | 2020-08-21 | 格瑞智慧人居环境科技(江苏)有限公司 | Air-cooled heat pump system for defrosting solution and control method thereof |
| CN113834135A (en) * | 2020-06-23 | 2021-12-24 | 宁波奥克斯电气股份有限公司 | Air conditioner |
| CN113915800A (en) * | 2021-09-27 | 2022-01-11 | 河南科技大学 | High-temperature double-source heat pump device |
| CN113915800B (en) * | 2021-09-27 | 2023-03-03 | 河南科技大学 | High-temperature double-source heat pump device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103574860A (en) | Air conditioner defrosting circulation system | |
| CN203907772U (en) | Air conditioning system with defrosting function | |
| CN103759456B (en) | A kind of air-conditioning or the heat-exchange system of heat pump and Defrost method thereof | |
| CN106016771A (en) | Solar air source heat pump triple co-generation system and control method thereof | |
| CN103983037B (en) | The Two-stage Compression air conditioning system of band defrosting function | |
| CN107278253A (en) | Air energy double stage heat pump air-conditioning system | |
| CN204187787U (en) | A kind of microwave frost removal type domestic air conditioner | |
| CN105299987A (en) | Air source heat pump sprinkling defrosting device based on super-hydrophobic finned tube exchanger | |
| CN203908096U (en) | Two-stage compression air conditioning system with defrosting function | |
| CN104634020A (en) | Defrosting system for air source heat pump | |
| CN104833152A (en) | Liquid impact preventing air conditioner defrosting system | |
| CN203908148U (en) | Air conditioning system | |
| CN102235725A (en) | Air-conditioning system of multi-connected solar air source heat pump | |
| CN202853111U (en) | Air source heat pump water heater | |
| CN202853065U (en) | Air conditioner defrosting circulation system | |
| CN201314725Y (en) | Heat pump type room air conditioner | |
| CN202328962U (en) | Water heater system of condensation heat defrosting air conditioner | |
| CN106705494A (en) | Air source heat pump energy conservation system with function of preventing air side heat exchanger from freezing | |
| CN1485588B (en) | Dual-purpose multiple operating mode self-defrosting type heat pump air-conditioner and automatic defrosting process thereof | |
| CN102620489A (en) | Air conditioner heat pump unit with antifreeze solution regenerated heat recovery device | |
| CN203595316U (en) | Screw rod type total heat recovery air-cooled heat pump air conditioning unit | |
| CN213178884U (en) | Multi-split system capable of adopting ground source water during low-temperature heating | |
| CN202177214U (en) | Novel cold air water heater equipped with two condenser | |
| CN213178886U (en) | Air conditioning system for switching outdoor unit and ground source water to supply heat by electromagnetic valve | |
| CN103712388A (en) | Novel defrosting system and control method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140212 |