CN102788462B - Air conditioner defrosting method and air-conditioning system - Google Patents
Air conditioner defrosting method and air-conditioning system Download PDFInfo
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- CN102788462B CN102788462B CN201210260415.3A CN201210260415A CN102788462B CN 102788462 B CN102788462 B CN 102788462B CN 201210260415 A CN201210260415 A CN 201210260415A CN 102788462 B CN102788462 B CN 102788462B
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Abstract
The invention discloses an air conditioner defrosting method and an air-conditioning system. The air conditioner defrosting method comprises the following steps of: acquiring the surface temperature of an outdoor unit heat exchanger; and regulating the air return temperature of an air inlet tube of a compressor according to the surface temperature. In the air conditioner defrosting method, the surface temperature of the outdoor unit heat exchanger is detected, and the air return temperature of the air inlet tube of the compressor is regulated according to the surface temperature, so that the temperature of a cooling medium in the outdoor unit heat exchanger is raised, and the defrosting efficiency of the air-conditioning system is further increased.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly a kind of air-conditioner defrosting method and air-conditioning system.
Background technology
The compression-type refrigerating system of general air-conditioning is to be made up of compressor, condenser, evaporimeter and restricting element etc., form closed system by pipeline according to being necessarily linked in sequence, in closed system, fill appropriate refrigerant, under the effect of compressor, cold-producing medium out comes back to compressor through condenser, evaporimeter and throttle structure from compressor, heat is to be accompanied by the movement of refrigerant and mobile, has realized the process of refrigerastion from evaporimeter heat absorption to condenser heat release.
When air-conditioning system heats, system is delivered to indoorly by heat from outdoor, and outdoor unit heat exchanger serves as evaporimeter, and in the time that off-premises station environment temperature approaches or is below the freezing point, airborne water vapour will condense and frosting at evaporator surface.The frosting of evaporimeter has strengthened the heat transfer resistance between evaporator surface and air, increase flow resistance when air-flow passes through evaporimeter, make to reduce by the air mass flow of evaporimeter, heat exchange efficiency obviously reduces, cause the heat exchange amount between outdoor environment and cold-producing medium to decline, system health worsens, even cisco unity malfunction.Therefore, air-conditioning system, in the time of heating operation, should be taked defrosting measure.In prior art, defrosting mode is commonly used reverse circulation, to bring negative effect to unit, as: when defrosting, interrupt heating, indoor temperature produces fluctuation, and internal system pressure oscillation is large, gives compressor build-up of pressure impact etc., so in low-temperature heating, the heating capacity of air-conditioning system is difficult to ensure.
Summary of the invention
Main purpose of the present invention is to provide a kind of air-conditioner defrosting method, is intended to promote air-conditioning system defrosting efficiency.
In order to realize goal of the invention, the invention provides a kind of air-conditioner defrosting method, comprise the following steps:
Obtain the surface temperature of outdoor unit heat exchanger;
Regulate the suction temperature of compressor inleting pipe according to described surface temperature.
Preferably, the described suction temperature step according to surface temperature adjusting compressor inleting pipe specifically comprises:
In the time that described surface temperature is greater than first threshold, keep described suction temperature constant;
In the time that described surface temperature is less than or equal to first threshold and is more than or equal to Second Threshold, obtain the return-air atmospheric pressure value of described compressor inleting pipe, and regulate described suction temperature according to this return-air atmospheric pressure value;
In the time that described surface temperature is less than Second Threshold, described suction temperature is heightened.
Preferably, described in obtain the return-air atmospheric pressure value of compressor inleting pipe, and regulate described suction temperature step specifically to comprise according to this return-air atmospheric pressure value:
Obtain the return-air atmospheric pressure value of compressor inleting pipe;
Judge whether described return-air atmospheric pressure value is greater than the 3rd threshold value;
If so, keep described suction temperature constant;
If not, described suction temperature is heightened.
Preferably, described suction temperature heightened and is specially:
The tube connector that described air inlet pipe is connected with the cross valve of off-premises station is shunted processing, forms the first distributary division and the second distributary division, and this first distributary division is carried out to heat treated.
The present invention also provides a kind of air-conditioning system, it is characterized in that, comprises off-premises station, and this off-premises station comprises:
Temperature sensor, for obtaining the surface temperature of outdoor unit heat exchanger;
Temperature-adjusting device, for regulating the suction temperature of compressor inleting pipe according to described surface temperature.
Preferably, described off-premises station also comprises: cross valve and low pressure tank, wherein said air inlet pipe is communicated with this low pressure tank, described cross valve is communicated with this low pressure tank by a tube connector, this tube connector forms the first distributary division and the second distributary division near one end shunting of described cross valve, and this first distributary division and the second distributary division converge in the one end near low pressure tank;
Described temperature-adjusting device comprises: the first electric expansion valve, the second electric expansion valve, heating module and controller, wherein the first electric expansion valve is arranged on described the first distributary division, the second electric expansion valve is arranged on described the second distributary division, heating module is arranged on described the second distributary division and between described the second electric expansion valve and low pressure tank, the ON/OFF of the first electric expansion valve and the second electric expansion valve described in the surface temperature control of the outdoor unit heat exchanger that controller obtains according to described temperature sensor.
Preferably, described controller specifically for:
In the time that described surface temperature is greater than first threshold, described the first electric expansion valve to be opened, the second electric expansion valve is closed;
In the time that described surface temperature is less than Second Threshold, described the first electric expansion valve and the second electric expansion valve are all opened.
Preferably, described temperature-adjusting device also comprise be arranged in described inlet tube, for detection of the low pressure sensor of its intraductal atmospheric pressure, and when described surface temperature be less than or equal to first threshold, while being more than or equal to Second Threshold, the ON/OFF of the first electric expansion valve and the second electric expansion valve described in the atmospheric pressure value control that described controller detects according to described low pressure sensor.
Preferably, in the time that the atmospheric pressure value of described low pressure sensor detection is less than the 3rd threshold value, described controller is all opened described the first electric expansion valve and the second electric expansion valve.
The present invention passes through to detect the surface temperature of outdoor unit heat exchanger, and regulates the suction temperature of compressor inleting pipe according to this surface temperature, thereby improves the temperature of refrigerant in outdoor unit heat exchanger, and then the defrosting efficiency of lifting air-conditioning system.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of air-conditioner defrosting method the first embodiment of the present invention;
Fig. 2 is the suction temperature schematic flow sheet that regulates compressor inleting pipe in air-conditioner defrosting method the first embodiment of the present invention according to the surface temperature of outdoor unit heat exchanger;
Fig. 3 regulates suction temperature schematic flow sheet according to the return-air atmospheric pressure value of compressor inleting pipe in air-conditioner defrosting method the first embodiment of the present invention;
Fig. 4 is the structural representation of originally developing air-conditioning system the first embodiment.
Realization, functional characteristics and the advantage of the object of the invention, in connection with embodiment, are described further with reference to accompanying drawing.
Detailed description of the invention
Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
With reference to Fig. 1, Fig. 1 is the schematic flow sheet of air-conditioner defrosting method the first embodiment of the present invention.A kind of air-conditioner defrosting method that the present embodiment provides comprises the following steps:
Step S10, obtains the surface temperature of outdoor unit heat exchanger;
In the present embodiment, can one temperature sensor be set on the surface of outdoor unit heat exchanger, air-conditioning is in the time that heating mode moves, by the surface temperature of this temperature sensor Real-time Obtaining outdoor unit heat exchanger.
Step S20, according to the suction temperature of above-mentioned surface temperature adjusting compressor inleting pipe.
Above-mentioned air-conditioning comprises off-premises station, and the compressor inleting pipe of this off-premises station is connected with a low pressure tank, and this low pressure tank is connected with cross valve by a tube connector.Air-conditioning system is in the time that heating mode moves, the surface temperature of outdoor unit heat exchanger can be detected by said temperature sensor, in the time that the surface temperature of this outdoor unit heat exchanger approaches or is below the freezing point, can suitably improve the suction temperature of air inlet pipe, improve the temperature of the refrigerant in air inlet pipe, thereby improve the temperature that arrives outdoor unit heat exchanger by the refrigerant after compressor compresses, and then promote the surface temperature of outdoor unit heat exchanger, can effectively remove the frosting on outdoor unit heat exchanger surface.
The present invention passes through to detect the surface temperature of outdoor unit heat exchanger, and regulates the suction temperature of compressor inleting pipe according to this surface temperature, thereby improves the temperature of refrigerant in outdoor unit heat exchanger, and then the defrosting efficiency of lifting air-conditioning system.
Particularly, above-mentioned raising suction temperature is specially: the tube connector that air inlet pipe is connected with the cross valve of off-premises station is shunted processing, forms the first distributary division and the second distributary division; And this second distributary division is carried out to heat treated.
The quantity of distributary division can arrange according to actual needs, the present embodiment one or two distributary division is example, one end of the close cross valve of above-mentioned tube connector has the first distributary division and second distributary division of shunting, and this first distributary division and the second distributary division converge in the one end near low pressure tank, and are communicated with low pressure tank.Wherein the first distributary division is provided with the first electric expansion valve; The second distributary division is provided with the second electric expansion valve and heating module, and this heating module is between low pressure tank and the second electric expansion valve.In the present embodiment, being 480P when the first electric expansion valve full-gear, is 0P when full-shut position.In the time that the return-air of air inlet pipe does not need to heat, can open the first electric expansion valve 480P, close the second electric expansion valve, and the second electric expansion valve is opened 0P.In the time that the surface temperature of this outdoor unit heat exchanger approaches or is below the freezing point, can open the first electric expansion valve 480P and the second electric expansion valve 480P simultaneously, after refrigerant in the second distributary division heats by heating module, mix in low pressure tank with the refrigerant of the first distributary division, and get back in compressor by air inlet pipe.Because the refrigerant in the second distributary division mixes in low pressure tank with the refrigerant in the first distributary division after heating module heating, improve the temperature that flows into refrigerant in air inlet pipe.
It should be noted that above-mentioned heating module can, for being reset at the heater element in air-conditioning system, can be also existing heater element in air-conditioning system, as electronic control module.The second distributary division can be arranged around this electronic control module, after the second electric expansion valve is opened, refrigerant will carry out exchange heat with this electronic control module, thereby improve the temperature of refrigerant in the second distributary division, reach the effect to refrigerant heating in air inlet pipe.
With reference to Fig. 2, Fig. 2 is the suction temperature schematic flow sheet that regulates compressor inleting pipe in air-conditioner defrosting method the first embodiment of the present invention according to the surface temperature of outdoor unit heat exchanger.Based on above-described embodiment, in the present embodiment, above-mentioned steps S20 specifically comprises:
Step S201, in the time that above-mentioned surface temperature is greater than first threshold, keeps suction temperature constant;
Step S202, in the time that surface temperature is less than or equal to first threshold and is more than or equal to Second Threshold, obtains the return-air atmospheric pressure value of compressor inleting pipe, regulates suction temperature according to this return-air atmospheric pressure value;
Step S203, in the time that surface temperature is less than Second Threshold, heightens suction temperature.
For example, air-conditioning system has just started to start while heating, and above-mentioned the first electric expansion valve is in open mode, and the second electric expansion valve is in closed condition, and the first electric expansion valve is opened 480P, and the second electric expansion valve is opened 0P.Now, the surface temperature of outdoor unit heat exchanger is greater than first threshold, keeps the duty of the first electric expansion valve and the second electric expansion valve.After work a period of time, when the surface temperature of outdoor unit heat exchanger be less than or equal to first threshold, while being more than or equal to Second Threshold, can obtain the return-air atmospheric pressure value of air inlet pipe, and adjust the duty of the first electric expansion valve and the second electric expansion valve according to this return-air atmospheric pressure value, thereby adjust the suction temperature of air inlet pipe.In the time that the surface temperature of outdoor unit heat exchanger is less than first threshold, open the second electric expansion valve 480P, refrigerant can be heated by the second distributary division, flow into low pressure tank, and mix with the refrigerant flowing into low pressure tank from the first distributary division, thereby improve the temperature that flows into refrigerant in air inlet pipe, reach the effect that the suction temperature of air inlet pipe is promoted, open the first electric expansion valve and the second electric expansion valve simultaneously, improve the flow of refrigerant in air inlet pipe, therefore can further promote the defrosting efficiency of outdoor unit heat exchanger.
It should be noted that above-mentioned first threshold and Second Threshold are a temperature value, its concrete large I arranges according to actual needs, is not further qualified at this.
Further, with reference to Fig. 3, Fig. 3 regulates suction temperature schematic flow sheet according to the return-air atmospheric pressure value of compressor inleting pipe in air-conditioner defrosting method the first embodiment of the present invention.Based on above-described embodiment, in the present embodiment, above-mentioned steps S202 specifically comprises:
Step S2021, obtains the return-air atmospheric pressure value of compressor inleting pipe;
Step S2022, judges whether this return-air atmospheric pressure value is greater than the 3rd threshold value; If perform step S2023, otherwise execution step 2024.
Step S2023, keeps suction temperature constant;
Step S2024, heightens suction temperature.
For example, a low pressure sensor for detection of its intraductal atmospheric pressure value can be set in air inlet pipe, detect in real time air inlet pipe inner return-air atmospheric pressure value, i.e. the atmospheric pressure value of refrigerant.Because the surface temperature of outdoor unit heat exchanger is when too low, will causes the atmospheric pressure value of refrigerant to reduce, thereby cause the return-air atmospheric pressure value of air inlet pipe to reduce.When return-air atmospheric pressure value is during lower than above-mentioned the 3rd threshold value, can be judged as the air on outdoor unit heat exchanger surface by frosting; Now need to improve suction temperature, can effectively prevent the air frosting on outdoor unit heat exchanger surface.Particularly, air-conditioning system is moved at heating mode, and be less than or equal to first threshold when said temperature sensor detects the surface temperature of outdoor unit heat exchanger, while being more than or equal to Second Threshold.To judge whether the atmospheric pressure value that low pressure sensor detects is greater than the 3rd threshold value, if so, keeps the duty of the first electric expansion valve and the second electric expansion valve, thereby keep the suction temperature of air inlet pipe constant; Open if not the second electronic expansion 480, thereby improve the suction temperature of air inlet pipe.
It should be noted that above-mentioned the first electric expansion valve and the second electric expansion valve are in the time of open mode, its degree of opening can arrange according to actual conditions, is not further qualified at this.For example, in the time regulating suction temperature according to the return-air atmospheric pressure value of air inlet pipe, the 4th threshold value also can be set, when return-air atmospheric pressure value is less than or equal to the 3rd threshold value, while being more than or equal to the 4th threshold value, can opens the first electric expansion valve 100P, the second electric expansion valve 480P; In the time that return-air atmospheric pressure value is less than the 4th threshold value, can open the first electric expansion valve 480P, the second electric expansion valve 480P.Above-mentioned the 3rd threshold value is atmospheric pressure value, and the large I of this atmospheric pressure value arranges according to actual conditions, is not further qualified at this.
With reference to Fig. 4, Fig. 4 is the structural representation of air-conditioning system the first embodiment of the present invention.The present invention also provides a kind of air-conditioning system, and this air-conditioning system comprises off-premises station, and this off-premises station comprises:
Temperature sensor 10, for obtaining the surface temperature of outdoor unit heat exchanger 20;
Temperature-adjusting device, for regulating the suction temperature of compressor 30 air inlet pipe 40 according to above-mentioned surface temperature.
Particularly, off-premises station also comprises: cross valve 50 and low pressure tank 60, wherein air inlet pipe 40 is communicated with this low pressure tank 60, cross valve 50 is communicated with this low pressure tank 60 by a tube connector 70, this tube connector forms the first distributary division 701 and the second distributary division 702 near one end shunting of cross valve 50, and this first distributary division 701 and the second distributary division 702 converge in the one end near low pressure tank, said temperature adjusting device comprises: the first electric expansion valve 301, the second electric expansion valve 302, heating module 303 and controller, wherein the first electric expansion valve 301 is arranged on the first distributary division 701, the second electric expansion valve 302 is arranged on the second distributary division 702, heating module 303 is arranged on the second distributary division 702, and between the second electric expansion valve 302 and low pressure tank 60, controller 304 and the first electric expansion valve 301, the second electric expansion valve 302 and temperature sensor 10 are electrically connected, surface temperature control first electric expansion valve 301 of the outdoor unit heat exchanger 20 that this controller obtains according to temperature sensor 10 and the ON/OFF of the second electric expansion valve 302.In the present embodiment, being 480P when the first electric expansion valve full-gear, is 0P when full-shut position.
For example, air-conditioning system has just started to start while heating, and controller will be controlled the first electric expansion valve 301 in open mode, and the second electric expansion valve 302, in closed condition, is opened the first electric expansion valve 480P, the second electric expansion valve 0P.Now, the surface temperature of outdoor unit heat exchanger 20 is greater than first threshold, keeps the duty of the first electric expansion valve 301 and the second electric expansion valve 302.After work a period of time, when the surface temperature of outdoor unit heat exchanger 20 be less than or equal to first threshold, while being more than or equal to Second Threshold, can obtain the return-air atmospheric pressure value of air inlet pipe 40, and adjust the duty of the first electric expansion valve 301 and the second electric expansion valve 302 according to this return-air atmospheric pressure value, thereby adjust the suction temperature of air inlet pipe 40.In the time that the surface temperature of outdoor unit heat exchanger 20 is less than first threshold, open the second electric expansion valve 302 (480P), refrigerant can be heated by the second distributary division 702, flow into low pressure tank 60, and mix with the refrigerant flowing into low pressure tank 60 from the first distributary division 701, thereby improve the temperature that flows into refrigerant in air inlet pipe 40, reach the effect that the suction temperature of air inlet pipe 40 is promoted, open the first electric expansion valve 301 (480P) and the second electric expansion valve 302 (480P) simultaneously, improve the flow of air inlet pipe 40 interior refrigerants, therefore can further promote the defrosting efficiency of outdoor unit heat exchanger 20.
It should be noted that above-mentioned first threshold and Second Threshold are a temperature value, its concrete large I arranges according to actual needs, is not further qualified at this.
The present invention obtains the surface temperature of outdoor unit heat exchanger 20 by a temperature sensor 10 is set, and according to the suction temperature of these surface temperature adjusting compressor 30 air inlet pipe 40, thereby improve the temperature of outdoor unit heat exchanger 20 refrigerants, and then promote the defrosting efficiency of air-conditioning system.
It should be noted that above-mentioned heating module 303 can, for being reset at the heater element in air-conditioning system, can be also existing heater element in air-conditioning system, as electronic control module.The second distributary division can be arranged around this electronic control module, after the second electric expansion valve 302 is opened, refrigerant will carry out exchange heat with this electronic control module, thereby improve the temperature of refrigerant in the second distributary division 702, reach the effect to refrigerant heating in air inlet pipe.
Further, said temperature adjusting device also comprise be arranged in inlet tube 40, for detection of the low pressure sensor 304 of its intraductal atmospheric pressure, and when above-mentioned surface temperature be less than or equal to first threshold, while being more than or equal to Second Threshold, atmospheric pressure value control the first electric expansion valve 301 that above-mentioned controller detects according to low pressure sensor 304 and the ON/OFF of the second electric expansion valve 302.
Because the surface temperature of outdoor unit heat exchanger 20 is when too low, will causes the atmospheric pressure value of refrigerant to reduce, thereby cause the return-air atmospheric pressure value of air inlet pipe 40 to reduce.When return-air atmospheric pressure value is during lower than above-mentioned the 3rd threshold value, can be judged as the air on outdoor unit heat exchanger 20 surfaces by frosting; Now need to improve suction temperature, can effectively prevent the air frosting on outdoor unit heat exchanger surface.Particularly, air-conditioning system is moved at heating mode, and be less than or equal to first threshold when said temperature sensor 10 detects the surface temperature of outdoor unit heat exchanger 20, while being more than or equal to Second Threshold.Controller will judge whether the atmospheric pressure value that low pressure sensor 304 detects is greater than the 3rd threshold value, if so, keeps the duty of the first electric expansion valve 301 and the second electric expansion valve 302, thereby keeps the suction temperature of air inlet pipe 40 constant; Open if not the second electronic expansion 302 (480P), thereby improve the suction temperature of air inlet pipe 40.
It should be noted that above-mentioned the first electric expansion valve 301 and the second electric expansion valve 302 are in the time of open mode, its degree of opening can arrange according to actual conditions, is not further qualified at this.For example, in the time regulating suction temperature according to the return-air atmospheric pressure value of air inlet pipe, the 4th threshold value also can be set, when return-air atmospheric pressure value is less than or equal to the 3rd threshold value, while being more than or equal to the 4th threshold value, can opens the first electric expansion valve 100P, the second electric expansion valve 480P; In the time that return-air atmospheric pressure value is less than the 4th threshold value, can open the first electric expansion valve 480P, the second electric expansion valve 480P.Above-mentioned the 3rd threshold value is atmospheric pressure value, and the large I of this atmospheric pressure value arranges according to actual conditions, is not further qualified at this.
These are only the preferred embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes description of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (5)
1. an air-conditioner defrosting method, is characterized in that, comprises the following steps:
Obtain the surface temperature of outdoor unit heat exchanger;
Regulate the suction temperature of compressor inleting pipe according to described surface temperature;
The described suction temperature step according to surface temperature adjusting compressor inleting pipe specifically comprises:
In the time that described surface temperature is greater than first threshold, keep described suction temperature constant;
In the time that described surface temperature is less than or equal to first threshold and is more than or equal to Second Threshold, obtain the return-air atmospheric pressure value of described compressor inleting pipe, and regulate described suction temperature according to this return-air atmospheric pressure value;
In the time that described surface temperature is less than Second Threshold, described suction temperature is heightened.
2. air-conditioner defrosting method as claimed in claim 1, is characterized in that, described in obtain the return-air atmospheric pressure value of compressor inleting pipe, and regulate described suction temperature step specifically to comprise according to this return-air atmospheric pressure value:
Obtain the return-air atmospheric pressure value of compressor inleting pipe;
Judge whether described return-air atmospheric pressure value is greater than the 3rd threshold value;
If so, keep described suction temperature constant;
If not, described suction temperature is heightened.
3. air-conditioner defrosting method as claimed in claim 1 or 2, is characterized in that, described suction temperature is heightened and is specially:
The tube connector that described air inlet pipe is connected with the cross valve of off-premises station is shunted processing, forms the first distributary division and the second distributary division, and this first distributary division is carried out to heat treated.
4. an air-conditioning system, is characterized in that, comprises off-premises station, and this off-premises station comprises:
Temperature sensor, for obtaining the surface temperature of outdoor unit heat exchanger;
Temperature-adjusting device, for regulating the suction temperature of compressor inleting pipe according to described surface temperature;
Described off-premises station also comprises: cross valve and low pressure tank, wherein said air inlet pipe is communicated with this low pressure tank, described cross valve is communicated with this low pressure tank by a tube connector, this tube connector forms the first distributary division and the second distributary division near one end shunting of described cross valve, and this first distributary division and the second distributary division converge in the one end near low pressure tank;
Described temperature-adjusting device comprises: the first electric expansion valve, the second electric expansion valve, heating module and controller, wherein the first electric expansion valve is arranged on described the first distributary division, the second electric expansion valve is arranged on described the second distributary division, heating module is arranged on described the second distributary division and between described the second electric expansion valve and low pressure tank, the ON/OFF of the first electric expansion valve and the second electric expansion valve described in the surface temperature control of the outdoor unit heat exchanger that controller obtains according to described temperature sensor;
Described controller specifically for:
In the time that described surface temperature is greater than first threshold, described the first electric expansion valve to be opened, the second electric expansion valve is closed;
In the time that described surface temperature is less than Second Threshold, described the first electric expansion valve and the second electric expansion valve are all opened;
Described temperature-adjusting device also comprise be arranged in described inlet tube, for detection of the low pressure sensor of its intraductal atmospheric pressure, and when described surface temperature be less than or equal to first threshold, while being more than or equal to Second Threshold, the ON/OFF of the first electric expansion valve and the second electric expansion valve described in the atmospheric pressure value control that described controller detects according to described low pressure sensor.
5. air-conditioning system as claimed in claim 4, is characterized in that, in the time that the atmospheric pressure value of described low pressure sensor detection is less than the 3rd threshold value, described controller is all opened described the first electric expansion valve and the second electric expansion valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210260415.3A CN102788462B (en) | 2012-07-25 | 2012-07-25 | Air conditioner defrosting method and air-conditioning system |
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| CN201210260415.3A CN102788462B (en) | 2012-07-25 | 2012-07-25 | Air conditioner defrosting method and air-conditioning system |
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| CN102788462A CN102788462A (en) | 2012-11-21 |
| CN102788462B true CN102788462B (en) | 2014-08-13 |
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| CN103940040A (en) * | 2014-04-14 | 2014-07-23 | 广东美的暖通设备有限公司 | Air-conditioner and defrosting method and device of air-conditioner |
| CN111386432A (en) * | 2018-10-31 | 2020-07-07 | 友隆电器工业(深圳)有限公司 | Frost-free operation method of dehumidifier and dehumidifier |
| CN110440388B (en) * | 2019-07-31 | 2021-04-09 | 广东志高暖通设备股份有限公司 | Double-monitoring control method for preventing snow deposition of outdoor unit of air conditioner |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2786506Y (en) * | 2005-03-28 | 2006-06-07 | 广东美的电器股份有限公司 | Water heater capable of reliable defrosting |
| CN201028904Y (en) * | 2006-11-06 | 2008-02-27 | 贺晓华 | Heat reclamation compensator for refrigerating and heating device |
| CN101706132A (en) * | 2009-11-20 | 2010-05-12 | 海信科龙电器股份有限公司 | Air conditioner |
| CN202056969U (en) * | 2011-04-06 | 2011-11-30 | 广东机电职业技术学院 | Air conditioner structure capable of improving low-temperature heating performance |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5100416B2 (en) * | 2008-01-25 | 2012-12-19 | 三菱電機株式会社 | Reheat dehumidifier and air conditioner |
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- 2012-07-25 CN CN201210260415.3A patent/CN102788462B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2786506Y (en) * | 2005-03-28 | 2006-06-07 | 广东美的电器股份有限公司 | Water heater capable of reliable defrosting |
| CN201028904Y (en) * | 2006-11-06 | 2008-02-27 | 贺晓华 | Heat reclamation compensator for refrigerating and heating device |
| CN101706132A (en) * | 2009-11-20 | 2010-05-12 | 海信科龙电器股份有限公司 | Air conditioner |
| CN202056969U (en) * | 2011-04-06 | 2011-11-30 | 广东机电职业技术学院 | Air conditioner structure capable of improving low-temperature heating performance |
Non-Patent Citations (1)
| Title |
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| JP特开2009-174800A 2009.08.06 |
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