CN105371524A - Compression type refrigerating and heating air conditioner system and outdoor unit defrosting method thereof - Google Patents
Compression type refrigerating and heating air conditioner system and outdoor unit defrosting method thereof Download PDFInfo
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- CN105371524A CN105371524A CN201410425379.0A CN201410425379A CN105371524A CN 105371524 A CN105371524 A CN 105371524A CN 201410425379 A CN201410425379 A CN 201410425379A CN 105371524 A CN105371524 A CN 105371524A
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Abstract
The invention provides a compression type refrigerating and heating air conditioner system and an outdoor unit defrosting method thereof. The outdoor unit defrosting method comprises the steps that a refrigerant flow path switching device of the air conditioner system is controlled, so that the air conditioner system is switched into the working state that an outdoor heat exchanger of the air conditioner system serve as a condenser; a compressor of the air conditioner system is started, so that refrigerant of the air conditioner system is condensed to release heat when flowing through the outdoor heat exchanger, the temperature of the outdoor heat exchanger is increased, and frost attached to the outdoor heat exchanger is melted; after the frost attached to the outdoor heat exchanger is melted away, the air conditioner system is maintained to continue to run in the working state that the outdoor heat exchanger serves as the condenser so that the temperature of the outdoor heat exchanger can continue to be increased; and after the temperature of the outdoor heat exchanger is increased to a first preset temperature, an outdoor draught fan of the air conditioner system is started, and the environment air heated by the outdoor heat exchanger is blown out of air outlet grids of an outdoor unit of the air conditioner system so as to melt frost attached to the air outlet grids. Thus, the air flow resistance of the air outlet grids of the outdoor unit is reduced, and heat exchange efficiency is improved.
Description
Technical field
The present invention relates to air-conditioner field, particularly relate to a kind of compression-type refrigeration heating air conditioner system and off-premises station Defrost method thereof.
Background technology
Current air-conditioner, generally possess refrigeration and heat two kinds of functions, that is same set of air-conditioning system both may be used for Summer Indoor cooling and also may be used for heating of house in winter, and the conventional means adopted in prior art adopts compression-type refrigeration circulation and heat pump cycle to realize.
Fig. 1 carries out according to the compression-type refrigeration heating air conditioner system of prior art the schematic diagram that heats, as figure, when carrying out heat pump cycle, outdoor heat exchanger 130 is as evaporimeter, indoor heat exchanger 140 is as condenser, arrow shows the flow direction of refrigerant, low pressure refrigerant steam is sucked by compressor 110 and drains into the D connection of cross valve 120 after boil down to high temperature and high pressure steam, discharge from E adapter, entering indoor heat exchanger 140 makes HTHP refrigerant steam condensation be highly pressurised liquid, indoor fan 170 produces air-flow, take away refrigerant condensation liberated heat, highly pressurised liquid is through throttle mechanism 150 (as capillary or choke valve), spray into outdoor heat exchanger 130, evaporate under corresponding low pressure), draw heat around, outdoor fan 160 produces air-flow and outdoor heat exchanger 130 carries out heat exchange.Low pressure refrigerant steam returns compressor 110 by the C adapter of cross valve 120 through taking over from S, and complete the circulation of refrigerant at refrigerant pipeline 180, room air like this constantly circulates, and reaches the object of raised temperature.
Heat " pump " in external environment is entered the higher indoor of temperature by heat pump cycle, because off-premises station ambient temperature is higher than in the temperature of outdoor heat exchanger 130 and air containing moisture, therefore can form solidifying frost or freezing on outdoor heat exchanger 130 surface, reduce heat exchange efficiency.For this problem; a large amount of Defrost methods is provided in prior art; general principle is for adopting reverse circulation mode; indoor fan 170 and outdoor fan 160 are shut down; switch the running status of cross valve; make outdoor heat exchanger 130 as condenser, indoor heat exchanger 140 as evaporimeter; improve the temperature of outdoor heat exchanger 130; defrost is carried out to outdoor heat exchanger 130; after the frost on outdoor heat exchanger 130 surface is eliminated; recover the state of cross valve 120, make air-conditioning system reenter heat pump cycle.
But use the Defrost mode of prior art, after the relatively more severe such as heavy snow weather of environment, heat exchange efficiency is still lower, not yet finds the reason and the solution that cause this problem at present.
Summary of the invention
In view of the above problems, propose the present invention to provide a kind of overcoming the problems referred to above or the compression-type refrigeration heating air conditioner system solved the problem at least in part and corresponding off-premises station Defrost method, improve the air-conditioning system problem that heat exchange efficiency is low in a heating mode.
The present invention's further object will improve heating effect when reducing and change the structure of air-conditioning system as far as possible.
Another further object of the present invention is the operation making to save user, improves Consumer's Experience.
Especially, the invention provides a kind of off-premises station Defrost method of compression-type refrigeration heating air conditioner system, the method comprises: control the refrigerant flow switching device shifter of air-conditioning system, makes air-conditioning system be switched to duty using its outdoor heat exchanger as condenser; Starting the compressor of air-conditioning system, making the condensation heat release when flowing through outdoor heat exchanger of the refrigerant of air-conditioning system, improve the temperature of outdoor heat exchanger, to eliminate the frost that outdoor heat exchanger adheres to; After the frost that outdoor heat exchanger adheres to is eliminated, keep air-conditioning system to continue to run using outdoor heat exchanger as the duty of condenser, make the temperature of outdoor heat exchanger continue to raise; After the temperature of outdoor heat exchanger rises to the first preset temperature, open the outdoor fan of air-conditioning system, the outlet grid of the surrounding air heated towards the off-premises station of air-conditioning system is blowed out, to eliminate the frost that outlet grid adheres to through outdoor heat exchanger.
Alternatively, after unlatching outdoor fan, above-mentioned off-premises station Defrost method also comprises: after the surface temperature of outdoor heat exchanger is lower than the second preset temperature, and suspend outdoor fan and run, wherein the second preset temperature is lower than the first preset temperature.
Alternatively, after reaching the scheduled time running time that outdoor fan is held open state, close compressor.
Alternatively, the rotating speed when surrounding air heated through outdoor heat exchanger blows towards outlet grid by outdoor fan is no more than 400 turns per minute.
Alternatively, above-mentioned off-premises station Defrost method also comprises: after receiving the brute force defrosting instruction sent by user, perform the step of the refrigerant flow switching device shifter controlling air-conditioning system, powerful defrosting instruction is used to indicate and defrosts to outdoor heat exchanger and outlet grid.
According to another aspect of the present invention, additionally provide a kind of compression-type refrigeration heating air conditioner system, comprise compressor, refrigerant flow switching device shifter, off-premises station, control device, off-premises station comprises: outdoor heat exchanger, outdoor fan, outdoor heat exchanger is connected by refrigerant pipeline with compressor, refrigerant flow switching device shifter, wherein, off-premises station also comprises: outdoor heat exchanger temperature sensor, is configured to the temperature of measuring chamber external heat exchanger; Control device is electrically connected respectively with compressor, refrigerant flow switching device shifter, outdoor heat exchanger temperature sensor, outdoor fan, be configured to: control refrigerant flow switching device shifter, make air-conditioning system be switched to duty using outdoor heat exchanger as condenser; Starting compressor, making refrigerant condensation heat release when flowing through outdoor heat exchanger, improve the temperature of outdoor heat exchanger, to eliminate the frost that outdoor heat exchanger adheres to; After the frost that outdoor heat exchanger adheres to is eliminated, keep air-conditioning system to continue to run using outdoor heat exchanger as the duty of condenser, make the temperature of outdoor heat exchanger continue to raise; After the temperature of outdoor heat exchanger rises to the first preset temperature, open outdoor fan, the outlet grid of the surrounding air heated towards off-premises station is blowed out, to eliminate the frost that outlet grid adheres to through outdoor heat exchanger.
Alternatively, control device is also configured to: after the surface temperature of outdoor heat exchanger is lower than the second preset temperature, and suspend outdoor fan and run, wherein the second preset temperature is lower than the first preset temperature; After reaching the scheduled time running time that outdoor fan is held open state, close compressor.
Alternatively, the rotating speed when surrounding air heated through outdoor heat exchanger blows towards outlet grid by outdoor fan is no more than 400 turns per minute.
Alternatively, above-mentioned compression-type refrigeration heating air conditioner system also comprises: human-computer interaction device, is configured to receive the brute force defrosting instruction sent by user, and powerful defrosting instruction is used to indicate and defrosts to outdoor heat exchanger and outlet grid; Control device, is electrically connected with human-computer interaction device, is also configured to perform according to brute force defrosting instruction the step controlling refrigerant flow switching device shifter.
The off-premises station Defrost method of compression-type refrigeration heating air conditioner system of the present invention is due to after eliminating the frost that outdoor heat exchanger adheres to, the condenser state of holding chamber external heat exchanger, continue to raise its temperature, and at startup outdoor fan, blow the air after heating to off-premises station outlet grid, continue to eliminate the frost that outlet grid adheres to, reduce the gas-flow resistance of off-premises station outlet grid, improve the air output of off-premises station, thus improve heat exchange efficiency, improve the heat pump heating efficiency of air-conditioning system.
Further, the off-premises station Defrost method of compression-type refrigeration heating air conditioner system of the present invention, to the air-supply air-flow size of outdoor fan and accurately control the running time of outdoor fan and compressor, while guaranteeing to carry out defrost to outlet grid, outdoor heat exchanger can not frosting again, and the electric energy that can not waste.
According to hereafter by reference to the accompanying drawings to the detailed description of the specific embodiment of the invention, those skilled in the art will understand above-mentioned and other objects, advantage and feature of the present invention more.
Accompanying drawing explanation
Hereinafter describe specific embodiments more of the present invention with reference to the accompanying drawings by way of example, and not by way of limitation in detail.Reference numeral identical in accompanying drawing denotes same or similar parts or part.It should be appreciated by those skilled in the art that these accompanying drawings may not be drawn in proportion.In accompanying drawing:
Fig. 1 carries out according to the compression-type refrigeration heating air conditioner system of prior art the schematic diagram that heats;
Fig. 2 is the schematic diagram of compression-type refrigeration heating air conditioner system according to an embodiment of the invention;
Fig. 3 is that compression-type refrigeration heating air conditioner system carries out the schematic diagram that defrosts according to an embodiment of the invention;
Fig. 4 is the schematic diagram of the off-premises station Defrost method of compression-type refrigeration heating air conditioner system according to the embodiment of the present invention; And
Fig. 5 is the optional flow chart of one of the off-premises station Defrost method of compression-type refrigeration heating air conditioner system according to the embodiment of the present invention.
Detailed description of the invention
Be directed in prior art, under outdoor environment more severe in the winter time, after outdoor heat exchanger has been defrosted, the problem that heat exchange efficiency is still not high, after carrying out a large amount of tests and checking work, the main cause finding to affect heat exchange efficiency is the outlet grid of snow and ice cover off-premises station, causes the airflow circulating resistance of off-premises station to increase, reduce circulating current, make outdoor heat exchanger cannot carry out sufficient heat exchange with surrounding environment.Through test, when keeping outlet grid unimpeded, heat pump cycle efficiency can effectively improve, and manually removes the inconvenience of outlet grid frost and may damage outlet grid in order to avoid user, proposes compression-type refrigeration heating air conditioner system and the off-premises station Defrost method thereof of the present embodiment.
Fig. 2 is the schematic diagram of compression-type refrigeration heating air conditioner system 200 according to an embodiment of the invention.This compression-type refrigeration heating air conditioner system 200 can comprise compressor 210, refrigerant flow switching device shifter 220, off-premises station 230, indoor set 240, control device 250, human-computer interaction device 260 in general manner, off-premises station 230 can be provided with: outdoor heat exchanger 231, outdoor fan 232, outdoor heat exchanger temperature sensor 233, and indoor set 240 can be provided with indoor heat exchanger 241, indoor fan 242.Flexible configuration can be carried out according to the concrete function of the compression-type refrigeration heating air conditioner system 200 of the present embodiment with upper-part.
Fig. 3 is that compression-type refrigeration heating air conditioner system 200 carries out the schematic diagram that defrosts according to an embodiment of the invention, carrying out in defrost process, control device 250 is by switching the connection status of refrigerant flow switching device shifter 220, air-conditioning system is switched to using outdoor heat exchanger as condenser, using indoor heat exchanger 242 as the state of evaporimeter, then compressor 210 is started, arrow shows the flow direction of refrigerant, low pressure refrigerant steam is sucked by compressor 110 and through by refrigerant flow switching device shifter 220 after boil down to high temperature and high pressure steam, import outdoor heat exchanger 231, HTHP refrigerant steam condensation is made to be highly pressurised liquid, utilize the heat that refrigerant condensation discharges, eliminate the frost that outdoor heat exchanger adheres to, highly pressurised liquid is through throttle mechanism (as capillary or choke valve), enter indoor heat exchanger 241, draw heat around, be evaporated to low pressure refrigerant steam and return compressor 210 via refrigerant flow switching device shifter 220, complete circulation.In outdoor heat exchanger 231 defrost phase, outdoor fan 232 and indoor fan 242 can be closed.
Unlike the prior art, after on outdoor heat exchanger 231, the frost of attachment is eliminated, control device 250 keeps air-conditioning system to continue to run using outdoor heat exchanger 231 as the duty of condenser, makes the temperature of outdoor heat exchanger 231 continue to raise; And detect after the temperature of outdoor heat exchanger 231 rises to the first preset temperature by outdoor heat exchanger temperature sensor 233, open outdoor fan 232, the outlet grid of the surrounding air heated through outdoor heat exchanger 231 towards off-premises station 230 is blowed out, to eliminate the frost that outlet grid adheres to, thus reduce the gas-flow resistance of off-premises station outlet grid, improve the air output of off-premises station.
The temperature probe of outdoor heat exchanger temperature sensor 233 can be attached at the surface of outdoor heat exchanger 231, measures the surface temperature obtaining outdoor heat exchanger 231.Outdoor fan 232 just opened by control device 250 reason after the temperature of outdoor heat exchanger 231 rises to the first preset temperature causes outdoor heat exchanger 231 surface solidifying frost again for preventing from ventilating when temperature is too low.
Preferably, control device 250 can also after the surface temperature at outdoor heat exchanger 231 be lower than the second preset temperature, and suspend outdoor fan 232 and run, wherein the second preset temperature is lower than the first preset temperature; For ensureing the defrosting effect of outlet grid, above first preset temperature can be set to 30 degrees Celsius, second preset temperature can be set to 15 degrees Celsius, that is, open the condition of outdoor fan 232 when the surface temperature of outdoor heat exchanger 231 reaches 30 degrees Celsius, the surface temperature of outdoor heat exchanger 231 is reduced to 15 degrees Celsius for suspending the condition of outdoor fan 232.
The defrosting of above outdoor heat exchanger 231 terminates rear continuation and carries out defrosting to outlet grid and may be defined as powerful defrosting mode, after reaching Preset Time the effective time that outlet grid is defrosted, powerful defrosting mode can be exited, the running time being namely held open state at outdoor fan 232 reaches (the such as 2 minutes scheduled time, specifically adjustable) after, eliminate the temperature of outdoor fan 232 because of outdoor heat exchanger 231 this running time lower than the time suspended during the second preset temperature.After exiting powerful defrosting mode, can close compressor 210, air-conditioning system is placed in holding state, heats instruction with products for further.
In order to make the air through outdoor heat exchanger heating fully play effect outlet grid being carried out to defrost, needing to ensure that the air-flow that outdoor fan 232 blows is gentle breeze, making full use of the heat of air-flow.Preferably, the rotating speed when surrounding air heated through outdoor heat exchanger 231 blows towards outlet grid by outdoor fan 232 is no more than 400 turns per minute, such as, rotate with per minute 300, lower than the rotating speed of outdoor fan 232 when normally heating refrigeration.
The startup of above powerful defrosting mode can be started by user, also can environmentally situation automatically carry out when air-conditioning system starts.Such as, human-computer interaction device 260 can for receiving the brute force defrosting instruction sent by user, and this brute force defrosting instruction is used to indicate and defrosts to outdoor heat exchanger and outlet grid; Control device 250, by being electrically connected with human-computer interaction device, performing according to brute force defrosting instruction the step controlling refrigerant flow switching device shifter, enters powerful defrosting mode.In actual use, open after air-conditioning system or user find outlet grid frosting after the bad weathers such as such as severe snow, air-conditioning system can be controlled and enter powerful defrosting mode.
Another mode starting powerful defrosting mode can be automatic Starting mode: in off-premises station 230, configure frost checkout gear, detect the situation of frosting on air grid after starting air-conditioning system 200.This frost checkout gear can adopt the modes such as light detection, windage detection to determine frosting situation on air grid, and the frost on outlet grid is when affecting airflow circulating, performed the step controlling refrigerant flow switching device shifter by control device 250, enter powerful defrosting mode.
Above refrigerant flow switching device shifter 220 can use the reversal valves such as cross valve, various microcontroller, digital signal processor and accessory circuit thereof can be utilized to be formed with upper controller 250, to realize above control logic.Human-computer interaction device 260 can adopt traditional remote controller and indoor set guidance panel in addition, and increase arranges powerful defrost button to receive powerful defrosting instruction.Preferred mode is the air-conditioning system 200 of the present embodiment is an intelligent air condition, and the control instruction that can receive intelligent terminal, normally to run, by increasing powerful defrosting instruction in the control software design of intelligent terminal, realizes the operation of powerful defrosting mode.
The present embodiment additionally provides a kind of off-premises station Defrost method of compression-type refrigeration heating air conditioner system, this off-premises station Defrost method can be performed by control device 250 in the compression-type refrigeration heating air conditioner system 200 of above embodiment, carry out in the operating mode of indoor heating in winter under adverse circumstances, improve the heat exchange efficiency of air-conditioning system.Fig. 4 is the schematic diagram of the off-premises station Defrost method of compression-type refrigeration heating air conditioner system according to the embodiment of the present invention, and this off-premises station Defrost method comprises:
Step S402, controls the refrigerant flow switching device shifter of air-conditioning system, makes air-conditioning system be switched to duty using its outdoor heat exchanger as condenser;
Step S404, starting the compressor of air-conditioning system, making the condensation heat release when flowing through outdoor heat exchanger of the refrigerant of air-conditioning system, improves the temperature of outdoor heat exchanger, to eliminate the frost that outdoor heat exchanger adheres to;
Step S406, after the frost that outdoor heat exchanger adheres to is eliminated, keeps air-conditioning system to continue to run using outdoor heat exchanger as the duty of condenser, makes the temperature of outdoor heat exchanger continue to raise;
Step S408, after the temperature of outdoor heat exchanger rises to the first preset temperature, open the outdoor fan of air-conditioning system, the outlet grid of the surrounding air heated towards the off-premises station of air-conditioning system is blowed out, to eliminate the frost that outlet grid adheres to through outdoor heat exchanger.
In above step, by switching the refrigerant flow of air-conditioning system, outdoor heat exchanger is placed in the duty of condenser, and indoor heat exchanger is placed in evaporator stage, thus after unlatching compressor, the temperature of outdoor heat exchanger is raised, eliminate the frost that outdoor heat exchanger adheres to, with existing Defrost method unlike, after the frost that outdoor heat exchanger adheres to is eliminated, continue to keep the running status of the path direction of refrigerant and compressor (compressor can be frequency reducing running status), the temperature of outdoor heat exchanger is made to continue to raise, and after the temperature meeting outdoor heat exchanger rises to the first preset temperature, open the outdoor fan of air-conditioning system, the frost of outlet grid adhering to by sending hot blast to eliminate to outlet grid, thus in follow-up heating operation process, improve the heat exchanger effectiveness of off-premises station.
For preventing outdoor heat exchanger frosting again, can also after the surface temperature of outdoor heat exchanger be lower than the second preset temperature after step S208, suspend outdoor fan and run, wherein the second preset temperature is lower than the first preset temperature.For ensureing the defrosting effect of outlet grid, above first preset temperature can be set to 30 degrees Celsius, second preset temperature can be set to 15 degrees Celsius, that is, open the condition of outdoor fan when the temperature of outdoor heat exchanger reaches 30 degrees Celsius, the surface temperature of outdoor heat exchanger is reduced to 15 degrees Celsius for suspending the condition of outdoor fan.
The process defrosted to outlet grid above may be defined as powerful defrosting mode, after reaching Preset Time the effective time that outlet grid is defrosted, powerful defrosting mode can be exited, the running time being namely held open state at outdoor fan reaches (the such as 2 minutes scheduled time, specifically adjustable) after, eliminate the temperature of outdoor fan because of outdoor heat exchanger this running time lower than the time suspended during the second preset temperature.After exiting powerful defrosting mode, can close compressor 210, air-conditioning system is placed in holding state, heats instruction with products for further.
In order to make the air through outdoor heat exchanger heating fully play effect outlet grid being carried out to defrost, needing to ensure that the air-flow that outdoor fan blows is gentle breeze, making full use of the heat of air-flow.Such as, rotating speed when the surrounding air heated through outdoor heat exchanger blows towards outlet grid by outdoor fan is no more than 400 turns per minute.Such as rotate with per minute 300, lower than the rotating speed of outdoor fan when normally heating refrigeration.
The startup of above powerful defrosting mode can be started by user, also can environmentally situation automatically carry out when air-conditioning system starts.Such as, after any one occurs in following two kinds of situations, perform the process of step S402 to step S404: receive the brute force defrosting instruction sent by user, powerful defrosting instruction is used to indicate and defrosts to outdoor heat exchanger and outlet grid; Or automatically detect that when opening air-conditioning system the frost on off-premises station outlet grid hinders air circulation.The former Starting mode needs to increase in the operating means (as local control panel, remote controller, intelligent terminal) of user the button or menu that arrange and receive powerful defrosting instruction, the Starting mode environmentally factor of the latter, when outlet grid possibility serious frostbite, after initial start-up, automatically carry out cleaning defrost.
The first preset temperature in above step, the second preset temperature, outdoor fan rotating speed all can be configured according to duty, and the example value of above embodiment is only the example that illustration method performs flow process, not limits the present embodiment.
Fig. 5 is the optional flow chart of one of the off-premises station Defrost method of compression-type refrigeration heating air conditioner system according to the embodiment of the present invention, and the off-premises station Defrost method as the compression-type refrigeration heating air conditioner system of the figure embodiment of the present invention can perform following flow process:
S501, air-conditioning system electrifying startup;
S502, judges whether to receive the brute force defrosting signal sent by user; Enter air-conditioning system if not and enter holding state, the hot work order of wait system;
S503, if the judged result of S502 is yes, switches to the state making outdoor heat exchanger as condenser working using refrigerant flow, namely refrigerant direction is that first the high temperature and high pressure steam compressed through compressor can enter outdoor heat exchanger, with condensation heat release;
S504, starts the compressor of air-conditioning system, and compressor can be frequency reducing running status or other running statuses, carries out condensation heat release, improve outdoor heat exchange actuator temperature, eliminate the frost on it first high temperature and high pressure steam to be sent into outdoor heat exchanger;
S505, judges whether the frost that outdoor heat exchanger adheres to eliminates, continues current state if not;
S506, if the judged result of S505 is yes, judges whether the temperature of outdoor heat exchanger reaches 30 degree, continues current state if not and continues to improve outdoor heat exchange actuator temperature;
S507, if the judged result of S506 is yes, opens outdoor fan, blows wind to outlet grid; The mode of air-supply is gentle breeze, is carrying out defrost, do not reach this purpose and the rotating speed of outdoor fan can be kept to be 300 rpms to make full use of gas flow temperature through outlet grid;
S508, judges whether the running time that outdoor fan is held open state reaches 2 minutes, and if so, exit powerful defrosting, close compressor, enters holding state, with the hot work order of wait system;
S509, if the judged result of S506 is no, whether the temperature of sensing chamber's external heat exchanger drops to 15 degree, if not, returns S506 and judges whether the temperature of outdoor heat exchanger reaches 30 degree;
S510, if the judged result of S509 is yes, suspends outdoor fan and runs, until the temperature of outdoor heat exchanger reaches 30 degree again.
Utilize above flow process after eliminating the frost that outdoor heat exchanger adheres to, the condenser state of holding chamber external heat exchanger, continue to raise its temperature, and at startup outdoor fan, the air after heating is blowed to off-premises station outlet grid, continue to eliminate the frost that outlet grid adheres to, reduce the gas-flow resistance of off-premises station outlet grid, improve the air output of off-premises station, thus improve heat exchange efficiency, improve the heat pump heating efficiency of air-conditioning system, and can to the air-supply air-flow size of outdoor fan, and the running time of outdoor fan and compressor accurately controls, while guaranteeing to carry out defrost to outlet grid, outdoor heat exchanger can not frosting again, and avoid waste of energy.
So far, those skilled in the art will recognize that, although multiple exemplary embodiment of the present invention is illustrate and described herein detailed, but, without departing from the spirit and scope of the present invention, still can directly determine or derive other modification many or amendment of meeting the principle of the invention according to content disclosed by the invention.Therefore, scope of the present invention should be understood and regard as and cover all these other modification or amendments.
Claims (9)
1. an off-premises station Defrost method for compression-type refrigeration heating air conditioner system, is characterized in that comprising:
Control the refrigerant flow switching device shifter of described air-conditioning system, make described air-conditioning system be switched to duty using its outdoor heat exchanger as condenser;
Start the compressor of described air-conditioning system, making the condensation heat release when flowing through described outdoor heat exchanger of the refrigerant of described air-conditioning system, improving the temperature of described outdoor heat exchanger, to eliminate the frost that described outdoor heat exchanger adheres to;
After the frost that described outdoor heat exchanger adheres to is eliminated, keep described air-conditioning system to continue to run using described outdoor heat exchanger as the duty of condenser, make the temperature of described outdoor heat exchanger continue to raise;
After the temperature of described outdoor heat exchanger rises to the first preset temperature, open the outdoor fan of described air-conditioning system, the outlet grid of the surrounding air heated through described outdoor heat exchanger towards the off-premises station of described air-conditioning system is blowed out, to eliminate the frost that described outlet grid adheres to.
2. off-premises station Defrost method according to claim 1, is characterized in that described off-premises station Defrost method also comprises after unlatching outdoor fan:
After the surface temperature of described outdoor heat exchanger is lower than the second preset temperature, suspend described outdoor fan and run, wherein said second preset temperature is lower than described first preset temperature.
3. off-premises station Defrost method according to claim 2, is characterized in that
After reaching the scheduled time, close described compressor running time that described outdoor fan is held open state.
4. off-premises station Defrost method according to any one of claim 1 to 3, is characterized in that
The rotating speed when surrounding air heated through described outdoor heat exchanger blows towards described outlet grid by described outdoor fan is no more than 400 turns per minute.
5. off-premises station Defrost method according to claim 1, is characterized in that, also comprise:
After receiving the brute force defrosting instruction sent by user, perform the step of the refrigerant flow switching device shifter controlling described air-conditioning system, described brute force defrosting instruction is used to indicate and defrosts to described outdoor heat exchanger and described outlet grid.
6. a compression-type refrigeration heating air conditioner system, comprise compressor, refrigerant flow switching device shifter, off-premises station, control device, described off-premises station comprises: outdoor heat exchanger, outdoor fan, described outdoor heat exchanger is connected by refrigerant pipeline with described compressor, described refrigerant flow switching device shifter, it is characterized in that
Described off-premises station also comprises: outdoor heat exchanger temperature sensor, is configured to the temperature measuring described outdoor heat exchanger;
Described control device is electrically connected respectively with described compressor, described refrigerant flow switching device shifter, described outdoor heat exchanger temperature sensor, described outdoor fan, is configured to:
Control described refrigerant flow switching device shifter, make described air-conditioning system be switched to duty using described outdoor heat exchanger as condenser;
Start described compressor, making refrigerant condensation heat release when flowing through described outdoor heat exchanger, improving the temperature of described outdoor heat exchanger, to eliminate the frost that described outdoor heat exchanger adheres to;
After the frost that described outdoor heat exchanger adheres to is eliminated, keep described air-conditioning system to continue to run using described outdoor heat exchanger as the duty of condenser, make the temperature of described outdoor heat exchanger continue to raise;
After the temperature of described outdoor heat exchanger rises to the first preset temperature, open described outdoor fan, the outlet grid of the surrounding air heated through described outdoor heat exchanger towards described off-premises station is blowed out, to eliminate the frost that described outlet grid adheres to.
7. compression-type refrigeration heating air conditioner system according to claim 6, is characterized in that described control device is also configured to:
After the surface temperature of described outdoor heat exchanger is lower than the second preset temperature, suspend described outdoor fan and run, wherein said second preset temperature is lower than described first preset temperature;
After reaching the scheduled time, close described compressor running time that described outdoor fan is held open state.
8. the compression-type refrigeration heating air conditioner system according to claim 6 or 7, is characterized in that, the rotating speed when surrounding air heated through described outdoor heat exchanger blows towards described outlet grid by described outdoor fan is no more than 400 turns per minute.
9. compression-type refrigeration heating air conditioner system according to claim 6, characterized by further comprising:
Human-computer interaction device, be configured to receive the brute force defrosting instruction sent by user, described brute force defrosting instruction is used to indicate and defrosts to described outdoor heat exchanger and described outlet grid;
Described control device, is electrically connected with described human-computer interaction device, is also configured to perform according to described brute force defrosting instruction the step controlling described refrigerant flow switching device shifter.
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| CN201410425379.0A CN105371524B (en) | 2014-08-26 | 2014-08-26 | Compression-type refrigeration heating air conditioner system and its outdoor machine frost eliminating method |
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| CN201410425379.0A CN105371524B (en) | 2014-08-26 | 2014-08-26 | Compression-type refrigeration heating air conditioner system and its outdoor machine frost eliminating method |
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Cited By (5)
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| CN106839532A (en) * | 2017-03-24 | 2017-06-13 | 合肥天鹅制冷科技有限公司 | Air-conditioning system evaporator antifrost icing device |
| CN110836442A (en) * | 2018-08-17 | 2020-02-25 | 青岛海尔空调器有限总公司 | Defrosting control method for air conditioner |
| CN110836460A (en) * | 2018-08-17 | 2020-02-25 | 青岛海尔空调器有限总公司 | Defrosting control method for air conditioner |
| CN110836438A (en) * | 2018-08-17 | 2020-02-25 | 青岛海尔空调器有限总公司 | Defrosting control method for air conditioner |
| CN111156660A (en) * | 2020-01-02 | 2020-05-15 | 珠海格力电器股份有限公司 | Defrosting control method for heat pump water heater system, storage medium and air conditioner |
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| CN101581522A (en) * | 2009-04-27 | 2009-11-18 | 哈尔滨工业大学 | Method for preventing air-source heat pump from frosting up |
| CN102197269A (en) * | 2008-11-17 | 2011-09-21 | 大金工业株式会社 | Air conditioning device |
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| JP2008128609A (en) * | 2006-11-24 | 2008-06-05 | Mitsubishi Electric Corp | Air conditioner |
| CN102197269A (en) * | 2008-11-17 | 2011-09-21 | 大金工业株式会社 | Air conditioning device |
| CN101581522A (en) * | 2009-04-27 | 2009-11-18 | 哈尔滨工业大学 | Method for preventing air-source heat pump from frosting up |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106839532A (en) * | 2017-03-24 | 2017-06-13 | 合肥天鹅制冷科技有限公司 | Air-conditioning system evaporator antifrost icing device |
| CN110836442A (en) * | 2018-08-17 | 2020-02-25 | 青岛海尔空调器有限总公司 | Defrosting control method for air conditioner |
| CN110836460A (en) * | 2018-08-17 | 2020-02-25 | 青岛海尔空调器有限总公司 | Defrosting control method for air conditioner |
| CN110836438A (en) * | 2018-08-17 | 2020-02-25 | 青岛海尔空调器有限总公司 | Defrosting control method for air conditioner |
| CN111156660A (en) * | 2020-01-02 | 2020-05-15 | 珠海格力电器股份有限公司 | Defrosting control method for heat pump water heater system, storage medium and air conditioner |
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| Publication number | Publication date |
|---|---|
| CN105371524B (en) | 2018-03-20 |
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