CN104457054A - Method and device for recovering air conditioner coolants - Google Patents

Method and device for recovering air conditioner coolants Download PDF

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Publication number
CN104457054A
CN104457054A CN201410655802.6A CN201410655802A CN104457054A CN 104457054 A CN104457054 A CN 104457054A CN 201410655802 A CN201410655802 A CN 201410655802A CN 104457054 A CN104457054 A CN 104457054A
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CN
China
Prior art keywords
air
conditioner
valve
indoor
refrigerant
Prior art date
Application number
CN201410655802.6A
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Chinese (zh)
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CN104457054B (en
Inventor
杨晓东
杜京昌
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广东美的制冷设备有限公司
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Priority to CN201410655802.6A priority Critical patent/CN104457054B/en
Publication of CN104457054A publication Critical patent/CN104457054A/en
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Publication of CN104457054B publication Critical patent/CN104457054B/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B45/00Arrangements for charging or discharging refrigerant
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B49/00Arrangement or mounting of control or safety devices
    • F25B49/02Arrangement or mounting of control or safety devices for compression type machines, plant or systems
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2345/00Details for charging or discharging refrigerants; Service stations therefor
    • F25B2345/002Collecting refrigerant from a cycle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2500/00Problems to be solved
    • F25B2500/05Cost reduction
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2700/00Sensing or detecting of parameters; Sensors therefor
    • F25B2700/19Pressures
    • F25B2700/193Pressures of the compressor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B2700/00Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21Temperatures
    • F25B2700/2117Temperatures of an evaporator

Abstract

The invention provides a method and device for recovering air conditioner coolants. The method comprises the steps that when a command to recover the coolants is received, an electronic expansion valve is opened; a target recovery position of the coolants is determined, if target recovery position is located at an outdoor unit, a liquid valve is closed, the air conditioner works in a refrigeration mode, and when it is detected that the first temperature changing value of an evaporator is larger than or equal to a first preset temperature changing value within a first preset period or the time during which the first pressure value in a suction pipeline of a compressor is smaller than a first preset pressure value is equal to the first preset period, an air valve is closed; if the target recovery position is located at an indoor unit, the air valve is closed, the air conditioner works in a heating mode, and when it is detected that the second temperature changing value of a condenser in the outdoor unit is larger than or equal to a second preset temperature changing value or the time during which the second pressure value in the suction pipeline is smaller than the second preset pressure value is equal to the second preset period, the liquid valve is closed, and the air conditioner is controlled to stop working. By means of the scheme, emission of the coolants is reduced, and maintenance cost is lowered.

Description

The recovery method of air-conditioner coolant and the retracting device of air-conditioner coolant
Technical field
The present invention relates to air-conditioner technical field, in particular to a kind of recovery method of air-conditioner coolant and a kind of retracting device of air-conditioner coolant.
Background technology
At present, the refrigerant reclaiming technical proposed in the related can only by refrigerant recovering to off-premises station, if off-premises station breaks down, refrigerant can only emit, and what break down in a lot of situation is off-premises station, the refrigerant reclaiming technical therefore proposed in correlation technique can not meet the maintenance requirement of present stage, because fallen by coolant discharging, not only cost of idleness, and maintenance efficiency step-down.
Therefore, how under guaranteeing that the refrigerant reclaimed has the prerequisite of better quality, select the recovery position of refrigerant neatly, and accurately can detect refrigerant and whether reclaimed and become technical problem urgently to be resolved hurrily.
Summary of the invention
The present invention is intended at least to solve one of technical problem existed in prior art or correlation technique.
For this reason, one object of the present invention is the recovery method proposing a kind of air-conditioner coolant.
Another object of the present invention is the retracting device proposing a kind of air-conditioner coolant.
For achieving the above object, embodiment according to a first aspect of the invention, propose a kind of recovery method of air-conditioner coolant, described air-conditioner comprises indoor set and off-premises station, the air valve for mutually transmitting refrigerant and liquid valve is connected with between described indoor set and described off-premises station, electric expansion valve between the heat exchanger being also provided with the heat exchanger being connected to described indoor set and described off-premises station in described indoor set, comprising: when receiving the recovery command to described refrigerant, opening described electric expansion valve, determine that the target of described refrigerant reclaims position according to described recovery command, if it is described off-premises station that described target reclaims position, then close described liquid valve, control described air-conditioner and carry out work in a chiller mode, and detect the first temperature change value of the evaporimeter in described indoor set, or the first force value detected in the suction line of the compressor in described off-premises station, and detecting that described first temperature change value of described evaporimeter is more than or equal to the first preset temperature changing value in the first Preset Time, or the time that described first force value is less than the first preset pressure value is when equaling described first Preset Time, then close described air valve, and control the recovery that described air-conditioner has quit work described refrigerant, if it is described indoor set that described target reclaims position, then close described air valve, control described air-conditioner and carry out work with heating mode, and detect the second temperature change value of the condenser in described off-premises station, or the second force value detected in the suction line of described compressor, and detecting that described second temperature change value of described condenser is more than or equal to the second preset temperature changing value in the second Preset Time, or the time that described second force value is less than the second preset pressure value is when equaling described second Preset Time, then close described liquid valve, and control described air-conditioner and quit work, to complete the recovery of described refrigerant.
The recovery method of air-conditioner coolant according to an embodiment of the invention, by when receiving refrigerant recovering to the instruction of off-premises station, close the liquid valve between off-premises station and indoor set, control air-conditioner simultaneously and carry out work in a chiller mode, liquid refrigerants after outdoor condenser can not be turned back in indoor machine evaporation, and can be returned in outdoor condenser by tracheae in the form of a vapor through the refrigerant of indoor machine evaporation and carry out condensation, and then can by the refrigerant recovering in air-conditioner in off-premises station, along with the coolant quantity in indoor set reduces, temperature in evaporimeter can change, pressure in compressor air suction pipeline also can change to some extent, therefore can be judged by the force value in the variations in temperature in evaporimeter or compressor air suction pipeline whether refrigerant has reclaimed, judged by the force value in the variations in temperature in evaporimeter or compressor air suction pipeline, its judged result can be more accurate.
Similarly, by when receiving refrigerant recovering to the instruction of indoor set, close the liquid pipe between off-premises station and indoor set, control air-conditioner simultaneously and carry out work with heating mode, liquid refrigerants after indoor set heat exchanger can not be turned back in outdoor condenser, and indoor machine evaporation can be returned by tracheae in the form of a vapor through the refrigerant of outdoor condenser and carry out condensation, and then can by the refrigerant recovering in air-conditioner in indoor set, along with the coolant quantity in off-premises station reduces, the temperature of the condenser in off-premises station can change to some extent, pressure in compressor air suction pipeline also can change to some extent, therefore can be judged by the force value in the variations in temperature in evaporimeter or compressor air suction pipeline whether refrigerant has reclaimed.
Simultaneously, because the technical scheme of the application can either by refrigerant recovering to off-premises station, again can by refrigerant recovering to indoor set, therefore, it is possible to choose corresponding take-back model neatly according to the actual conditions of air-conditioner, as off-premises station break down time, by refrigerant recovering to indoor set, when indoor set breaks down, by refrigerant recovering to off-premises station; It also avoid in correlation technique and reclaim the cost recovery that causes of refrigerant refrigerant that is high and that reclaim problem of low quality by reclaimer.
Particularly, the temperature in temperature sensor acquisition evaporimeter and condenser can be adopted, the force value in pressure sensor acquisition compressor air suction pipeline can be adopted.
In addition, the recovery method of air-conditioner coolant according to the above embodiment of the present invention, can also have following additional technical characteristic:
According to one embodiment of present invention, specify the target determining described refrigerant to reclaim position according to described recovery, specifically comprise: judge whether described air-conditioner is provided with cross valve; When described air-conditioner is not installed described cross valve, determining that the target of described refrigerant reclaims position is described off-premises station; When described air-conditioner is provided with described cross valve, prompting user selects the target of described refrigerant to reclaim position from described indoor set and described indoor set; When receiving the select command of described user to described indoor set, determining that described indoor set is that described target reclaims position, when receiving the select command of described user to described off-premises station, determining that described off-premises station is that described target reclaims position.
The recovery method of air-conditioner coolant according to an embodiment of the invention, when carrying out target recovery position and determining, according to whether air-conditioner being provided with cross valve can determine, if air-conditioner does not install cross valve, now illustrate that this air-conditioner only has refrigerating function, now by refrigerant recovering to off-premises station, can only can not be recycled to indoor set, now determining that target reclaims position is off-premises station.And when air-conditioner being provided with cross valve, now, user's select target can be pointed out to reclaim position, user can select by refrigerant recovering to indoor set or off-premises station according to demands of individuals, thus determines that target reclaims position.
According to one embodiment of present invention, the step of closing described tracheae and/or described liquid pipe is specially: by controlling the closed electromagnetic valve be arranged on tracheae and/or liquid pipe, to close described air valve and/or described liquid valve; And/or display reminding information, to close described air valve and/or described liquid valve by user according to described information.
The recovery method of air-conditioner coolant according to an embodiment of the invention, when closing the tracheae and liquid pipe that are connected between indoor set and off-premises station, both automatically can be controlled by system, also display reminding information (as with the form of sound and/or light) can be passed through, by maintenance personal's manual-lock.
According to one embodiment of present invention, also comprise: after completing described refrigerant recovering, control described air-conditioner and enter breakdown maintenance state, to forbid the power-on operation of described air-conditioner.
The recovery method of air-conditioner coolant according to an embodiment of the invention, in order to ensure the safety of air-conditioning system, after refrigerant-recovery process terminates, controls air-conditioning system and enters breakdown maintenance state, to forbid the power-on operation of air-conditioner.Now maintenance personal can carry out maintenance activity, and after maintenance terminates, open the operating valve on liquid pipe and tracheae, the refrigerant circulation line between indoor set with off-premises station be communicated with, after re-powering, air-conditioning system returns to normal condition.For the air-conditioning system adopting the magnetic valve controlled on liquid pipe and tracheae automatically to carry out liquid pipe and tracheae shutoff operation, can after air-conditioning system releases breakdown maintenance state, service switch is pulled back to and closes gear or closed after refrigerant reclaiming function by remote controller by such as maintenance personal, the magnetic valve that system board controls on liquid pipe and tracheae is automatically opened, after re-powering, air-conditioning system returns to normal condition.
According to one embodiment of present invention, also comprise: according to the setting command received, described first Preset Time, described first preset temperature changing value, described first preset pressure value, described second Preset Time, described second preset temperature changing value and described second preset pressure value are set.
The recovery method of air-conditioner coolant according to an embodiment of the invention; maintenance personal rule of thumb can arrange the first Preset Time, the first preset temperature changing value, the first preset pressure value, the second Preset Time, the second preset temperature changing value and the second preset pressure value; thus ensure the normal recovery of refrigerant recovering; and after refrigerant recovering completes, stop the work of air-conditioner in time, be in the state of vacuumizing for a long time to avoid compressor.
Embodiment according to a second aspect of the present invention proposes a kind of retracting device of air-conditioner coolant, described air-conditioner comprises indoor set and off-premises station, the air valve for mutually transmitting refrigerant and liquid valve is connected with between described indoor set and described off-premises station, electric expansion valve between the heat exchanger being also provided with the heat exchanger being connected to described indoor set and described off-premises station in described indoor set, comprise: processing unit, when receiving the recovery command to described refrigerant, open described electric expansion valve, according to described recovery command, determining unit, determines that the target of described refrigerant reclaims position, control unit, if it is described off-premises station that described target reclaims position, then close described liquid valve, control described air-conditioner and carry out work in a chiller mode, and detect the first temperature change value of the evaporimeter in described indoor set, or the first force value detected in the suction line of the compressor in described off-premises station, and detecting that described first temperature change value of described evaporimeter is more than or equal to the first preset temperature changing value in the first Preset Time, or the time that described first force value is less than the first preset pressure value is when equaling described first Preset Time, then close described air valve, and control described air-conditioner and quit work, to complete the recovery of described refrigerant, if it is described indoor set that described target reclaims position, then close described air valve, control described air-conditioner and carry out work with heating mode, and detect the second temperature change value of the condenser in described off-premises station, or the second force value detected in the suction line of described compressor, and detecting that described second temperature change value of described condenser is more than or equal to the second preset temperature changing value in the second Preset Time, or the time that described second force value is less than the second preset pressure value is when equaling described second Preset Time, then close described liquid valve, and control described air-conditioner and quit work, to complete the recovery of described refrigerant.
The retracting device of air-conditioner coolant according to an embodiment of the invention, by when receiving refrigerant recovering to the instruction of off-premises station, close the liquid valve between off-premises station and indoor set, control air-conditioner simultaneously and carry out work in a chiller mode, liquid refrigerants after outdoor condenser can not be turned back in indoor machine evaporation, and can be returned in outdoor condenser by tracheae in the form of a vapor through the refrigerant of indoor machine evaporation and carry out condensation, and then can by the refrigerant recovering in air-conditioner in off-premises station, along with the coolant quantity in indoor set reduces, temperature in evaporimeter can change, pressure in compressor air suction pipeline also can change to some extent, therefore can be judged by the force value in the variations in temperature in evaporimeter or compressor air suction pipeline whether refrigerant has reclaimed, judged by the force value in the variations in temperature in evaporimeter or compressor air suction pipeline, its judged result can be more accurate.
Similarly, by when receiving refrigerant recovering to the instruction of indoor set, close the liquid pipe between off-premises station and indoor set, control air-conditioner simultaneously and carry out work with heating mode, liquid refrigerants after indoor set heat exchanger can not be turned back in outdoor condenser, and indoor machine evaporation can be returned by tracheae in the form of a vapor through the refrigerant of outdoor condenser and carry out condensation, and then can by the refrigerant recovering in air-conditioner in indoor set, along with the coolant quantity in off-premises station reduces, the temperature of the condenser in off-premises station can change to some extent, pressure in compressor air suction pipeline also can change to some extent, therefore can be judged by the force value in the variations in temperature in evaporimeter or compressor air suction pipeline whether refrigerant has reclaimed.
Simultaneously, because the technical scheme of the application can either by refrigerant recovering to off-premises station, again can by refrigerant recovering to indoor set, therefore, it is possible to choose corresponding take-back model neatly according to the actual conditions of air-conditioner, as off-premises station break down time, by refrigerant recovering to indoor set, when indoor set breaks down, by refrigerant recovering to off-premises station; It also avoid in correlation technique and reclaim the cost recovery that causes of refrigerant refrigerant that is high and that reclaim problem of low quality by reclaimer.
Particularly, the temperature in temperature sensor acquisition evaporimeter and condenser can be adopted, the force value in pressure sensor acquisition compressor air suction pipeline can be adopted.
According to one embodiment of present invention, described determining unit specifically comprises: judging unit, judges whether described air-conditioner is provided with cross valve; First determining unit, when described air-conditioner is not installed described cross valve, determining that the target of described refrigerant reclaims position is described off-premises station; Tip element, when described air-conditioner is provided with described cross valve, the target pointing out described user to select described refrigerant from described indoor set and described indoor set reclaims position; Second determining unit, when receiving the select command of described user to described indoor set, determining that described indoor set is that described target reclaims position, when receiving the select command of described user to described off-premises station, determining that described off-premises station is that described target reclaims position.
The retracting device of air-conditioner coolant according to an embodiment of the invention, when carrying out target recovery position and determining, according to whether air-conditioner being provided with cross valve can determine, if air-conditioner does not install cross valve, now illustrate that this air-conditioner only has refrigerating function, now by refrigerant recovering to off-premises station, can only can not be recycled to indoor set, now determining that target reclaims position is off-premises station.And when air-conditioner being provided with cross valve, now, user's select target can be pointed out to reclaim position, user can select by refrigerant recovering to indoor set or off-premises station according to demands of individuals, thus determines that target reclaims position.
According to one embodiment of present invention, described control unit specifically for: control the closed electromagnetic valve that is arranged on tracheae and/or liquid pipe, to close described air valve and/or described liquid valve; And/or control display unit display reminding information, to close described air valve and/or described liquid valve by user according to described information; Wherein, described display unit is used for showing described information according to the control instruction of described control unit.
The retracting device of air-conditioner coolant according to an embodiment of the invention, when closing the tracheae and liquid pipe that are connected between indoor set and off-premises station, both automatically can be controlled by system, also display reminding information (as with the form of sound and/or light) can be passed through, by maintenance personal's manual-lock.
According to one embodiment of present invention, described control unit also for: after completing described refrigerant recovering, control described air-conditioner and enter breakdown maintenance state, to forbid the power-on operation of described air-conditioner.
The retracting device of air-conditioner coolant according to an embodiment of the invention, in order to ensure the safety of air-conditioning system, after refrigerant-recovery process terminates, controls air-conditioning system and enters breakdown maintenance state, to forbid the power-on operation of air-conditioner.Now maintenance personal can carry out maintenance activity, and after maintenance terminates, open the operating valve on liquid pipe and tracheae, the refrigerant circulation line between indoor set with off-premises station be communicated with, after re-powering, air-conditioning system returns to normal condition.For the air-conditioning system adopting the magnetic valve controlled on liquid pipe and tracheae automatically to carry out liquid pipe and tracheae shutoff operation, can after air-conditioning system releases breakdown maintenance state, service switch is pulled back to and closes gear or closed after refrigerant reclaiming function by remote controller by such as maintenance personal, the magnetic valve that system board controls on liquid pipe and tracheae is automatically opened, after re-powering, air-conditioning system returns to normal condition.
According to one embodiment of present invention, also comprise: setting unit, according to the setting command received, described first Preset Time, described first preset temperature changing value, described first preset pressure value, described second Preset Time, described second preset temperature changing value and described second preset pressure value are set.
The recovery method of air-conditioner coolant according to an embodiment of the invention; maintenance personal rule of thumb can arrange the first Preset Time, the first preset temperature changing value, the first preset pressure value, the second Preset Time, the second preset temperature changing value and the second preset pressure value; thus ensure the normal recovery of refrigerant recovering; and after refrigerant recovering completes, stop the work of air-conditioner in time, be in the state of vacuumizing for a long time to avoid compressor.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 shows the flow chart of the recovery method of air-conditioner coolant according to an embodiment of the invention;
Fig. 2 shows the block diagram of the retracting device of air-conditioner coolant according to an embodiment of the invention;
Fig. 3 shows the structural representation of air-conditioner according to an embodiment of the invention;
Fig. 4 shows the particular flow sheet of the recovery method of air-conditioner coolant according to an embodiment of the invention;
Fig. 5 shows the particular flow sheet of the recovery method of air-conditioner coolant according to an embodiment of the invention.
Detailed description of the invention
In order to more clearly understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
Set forth a lot of detail in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from other modes described here and implement, and therefore, protection scope of the present invention is not by the restriction of following public specific embodiment.
Fig. 1 shows the flow chart of the recovery method of air-conditioner coolant according to an embodiment of the invention.
As shown in Figure 1, the recovery method of air-conditioner coolant, comprising: step 102 according to an embodiment of the invention, when receiving the recovery command to described refrigerant, opens described electric expansion valve, according to described recovery command, step 104, determines that the target of described refrigerant reclaims position, step 106, if it is described off-premises station that described target reclaims position, then close described liquid valve, control described air-conditioner and carry out work in a chiller mode, and detect the first temperature change value of the evaporimeter in described indoor set, or the first force value detected in the suction line of the compressor in described off-premises station, and detecting that described first temperature change value of described evaporimeter is more than or equal to the first preset temperature changing value in the first Preset Time, or the time that described first force value is less than the first preset pressure value is when equaling described first Preset Time, then close described air valve, and control the recovery that described air-conditioner has quit work described refrigerant, step 108, if it is described indoor set that described target reclaims position, then close described air valve, control described air-conditioner and carry out work with heating mode, and detect the second temperature change value of the condenser in described off-premises station, or the second force value detected in the suction line of described compressor, and detecting that described second temperature change value of described condenser is more than or equal to the second preset temperature changing value in the second Preset Time, or the time that described second force value is less than the second preset pressure value is when equaling described second Preset Time, then close described liquid valve, and control described air-conditioner and quit work, to complete the recovery of described refrigerant.
The recovery method of air-conditioner coolant according to an embodiment of the invention, by when receiving refrigerant recovering to the instruction of off-premises station, close the liquid valve between off-premises station and indoor set, control air-conditioner simultaneously and carry out work in a chiller mode, liquid refrigerants after outdoor condenser can not be turned back in indoor machine evaporation, and can be returned in outdoor condenser by tracheae in the form of a vapor through the refrigerant of indoor machine evaporation and carry out condensation, and then can by the refrigerant recovering in air-conditioner in off-premises station, along with the coolant quantity in indoor set reduces, temperature in evaporimeter can change, pressure in compressor air suction pipeline also can change to some extent, therefore can be judged by the force value in the variations in temperature in evaporimeter or compressor air suction pipeline whether refrigerant has reclaimed, judged by the force value in the variations in temperature in evaporimeter or compressor air suction pipeline, its judged result can be more accurate.
Similarly, by when receiving refrigerant recovering to the instruction of indoor set, close the liquid pipe between off-premises station and indoor set, control air-conditioner simultaneously and carry out work with heating mode, liquid refrigerants after indoor set heat exchanger can not be turned back in outdoor condenser, and indoor machine evaporation can be returned by tracheae in the form of a vapor through the refrigerant of outdoor condenser and carry out condensation, and then can by the refrigerant recovering in air-conditioner in indoor set, along with the coolant quantity in off-premises station reduces, the temperature of the condenser in off-premises station can change to some extent, pressure in compressor air suction pipeline also can change to some extent, therefore can be judged by the force value in the variations in temperature in evaporimeter or compressor air suction pipeline whether refrigerant has reclaimed.
Simultaneously, because the technical scheme of the application can either by refrigerant recovering to off-premises station, again can by refrigerant recovering to indoor set, therefore, it is possible to choose corresponding take-back model neatly according to the actual conditions of air-conditioner, as off-premises station break down time, by refrigerant recovering to indoor set, when indoor set breaks down, by refrigerant recovering to off-premises station; It also avoid in correlation technique and reclaim the cost recovery that causes of refrigerant refrigerant that is high and that reclaim problem of low quality by reclaimer.
Particularly, the temperature in temperature sensor acquisition evaporimeter and condenser can be adopted, the force value in pressure sensor acquisition compressor air suction pipeline can be adopted.
In addition, the recovery method of air-conditioner coolant according to the above embodiment of the present invention, can also have following additional technical characteristic:
According to one embodiment of present invention, specify the target determining described refrigerant to reclaim position according to described recovery, specifically comprise: judge whether described air-conditioner is provided with cross valve; When described air-conditioner is not installed described cross valve, determining that the target of described refrigerant reclaims position is described off-premises station; When described air-conditioner is provided with described cross valve, prompting user selects the target of described refrigerant to reclaim position from described indoor set and described indoor set; When receiving the select command of described user to described indoor set, determining that described indoor set is that described target reclaims position, when receiving the select command of described user to described off-premises station, determining that described off-premises station is that described target reclaims position.
The recovery method of air-conditioner coolant according to an embodiment of the invention, when carrying out target recovery position and determining, according to whether air-conditioner being provided with cross valve can determine, if air-conditioner does not install cross valve, now illustrate that this air-conditioner only has refrigerating function, now by refrigerant recovering to off-premises station, can only can not be recycled to indoor set, now determining that target reclaims position is off-premises station.And when air-conditioner being provided with cross valve, now, user's select target can be pointed out to reclaim position, user can select by refrigerant recovering to indoor set or off-premises station according to demands of individuals, thus determines that target reclaims position.
According to one embodiment of present invention, the step of closing described tracheae and/or described liquid pipe is specially: by controlling the closed electromagnetic valve be arranged on tracheae and/or liquid pipe, to close described air valve and/or described liquid valve; And/or display reminding information, to close described air valve and/or described liquid valve by user according to described information.
The recovery method of air-conditioner coolant according to an embodiment of the invention, when closing the tracheae and liquid pipe that are connected between indoor set and off-premises station, both automatically can be controlled by system, also display reminding information (as with the form of sound and/or light) can be passed through, by maintenance personal's manual-lock.
According to one embodiment of present invention, also comprise: after completing described refrigerant recovering, control described air-conditioner and enter breakdown maintenance state, to forbid the power-on operation of described air-conditioner.
The recovery method of air-conditioner coolant according to an embodiment of the invention, in order to ensure the safety of air-conditioning system, after refrigerant-recovery process terminates, controls air-conditioning system and enters breakdown maintenance state, to forbid the power-on operation of air-conditioner.Now maintenance personal can carry out maintenance activity, and after maintenance terminates, open the operating valve on liquid pipe and tracheae, the refrigerant circulation line between indoor set with off-premises station be communicated with, after re-powering, air-conditioning system returns to normal condition.For the air-conditioning system adopting the magnetic valve controlled on liquid pipe and tracheae automatically to carry out liquid pipe and tracheae shutoff operation, can after air-conditioning system releases breakdown maintenance state, service switch is pulled back to and closes gear or closed after refrigerant reclaiming function by remote controller by such as maintenance personal, the magnetic valve that system board controls on liquid pipe and tracheae is automatically opened, after re-powering, air-conditioning system returns to normal condition.
According to one embodiment of present invention, also comprise: according to the setting command received, described first Preset Time, described first preset temperature changing value, described first preset pressure value, described second Preset Time, described second preset temperature changing value and described second preset pressure value are set.
The recovery method of air-conditioner coolant according to an embodiment of the invention; maintenance personal rule of thumb can arrange the first Preset Time, the first preset temperature changing value, the first preset pressure value, the second Preset Time, the second preset temperature changing value and the second preset pressure value; thus ensure the normal recovery of refrigerant recovering; and after refrigerant recovering completes, stop the work of air-conditioner in time, be in the state of vacuumizing for a long time to avoid compressor.
Fig. 2 shows the block diagram of the retracting device of air-conditioner coolant according to an embodiment of the invention.
As shown in Figure 2, the retracting device of air-conditioner coolant according to an embodiment of the invention, comprising: processing unit 202, when receiving the recovery command to described refrigerant, opens described electric expansion valve, according to described recovery command, determining unit 204, determines that the target of described refrigerant reclaims position, control unit 206, if it is described off-premises station that described target reclaims position, then close described liquid valve, control described air-conditioner and carry out work in a chiller mode, and detect the first temperature change value of the evaporimeter in described indoor set, or the first force value detected in the suction line of the compressor in described off-premises station, and detecting that described first temperature change value of described evaporimeter is more than or equal to the first preset temperature changing value in the first Preset Time, or the time that described first force value is less than the first preset pressure value is when equaling described first Preset Time, then close described air valve, and control described air-conditioner and quit work, to complete the recovery of described refrigerant, if it is described indoor set that described target reclaims position, then close described air valve, control described air-conditioner and carry out work with heating mode, and detect the second temperature change value of the condenser in described off-premises station, or the second force value detected in the suction line of described compressor, and detecting that described second temperature change value of described condenser is more than or equal to the second preset temperature changing value in the second Preset Time, or the time that described second force value is less than the second preset pressure value is when equaling described second Preset Time, then close described liquid valve, and control described air-conditioner and quit work, to complete the recovery of described refrigerant.
The retracting device of air-conditioner coolant according to an embodiment of the invention, by when receiving refrigerant recovering to the instruction of off-premises station, close the liquid valve between off-premises station and indoor set, control air-conditioner simultaneously and carry out work in a chiller mode, liquid refrigerants after outdoor condenser can not be turned back in indoor machine evaporation, and can be returned in outdoor condenser by tracheae in the form of a vapor through the refrigerant of indoor machine evaporation and carry out condensation, and then can by the refrigerant recovering in air-conditioner in off-premises station, along with the coolant quantity in indoor set reduces, temperature in evaporimeter can change, pressure in compressor air suction pipeline also can change to some extent, therefore can be judged by the force value in the variations in temperature in evaporimeter or compressor air suction pipeline whether refrigerant has reclaimed, judged by the force value in the variations in temperature in evaporimeter or compressor air suction pipeline, its judged result can be more accurate.
Similarly, by when receiving refrigerant recovering to the instruction of indoor set, close the liquid pipe between off-premises station and indoor set, control air-conditioner simultaneously and carry out work with heating mode, liquid refrigerants after indoor set heat exchanger can not be turned back in outdoor condenser, and indoor machine evaporation can be returned by tracheae in the form of a vapor through the refrigerant of outdoor condenser and carry out condensation, and then can by the refrigerant recovering in air-conditioner in indoor set, along with the coolant quantity in off-premises station reduces, the temperature of the condenser in off-premises station can change to some extent, pressure in compressor air suction pipeline also can change to some extent, therefore can be judged by the force value in the variations in temperature in evaporimeter or compressor air suction pipeline whether refrigerant has reclaimed.
Simultaneously, because the technical scheme of the application can either by refrigerant recovering to off-premises station, again can by refrigerant recovering to indoor set, therefore, it is possible to choose corresponding take-back model neatly according to the actual conditions of air-conditioner, as off-premises station break down time, by refrigerant recovering to indoor set, when indoor set breaks down, by refrigerant recovering to off-premises station; It also avoid in correlation technique and reclaim the cost recovery that causes of refrigerant refrigerant that is high and that reclaim problem of low quality by reclaimer.
Particularly, the temperature in temperature sensor acquisition evaporimeter and condenser can be adopted, the force value in pressure sensor acquisition compressor air suction pipeline can be adopted.
According to one embodiment of present invention, described determining unit 204 specifically comprises: judging unit 2042, judges whether described air-conditioner is provided with cross valve; First determining unit 2044, when described air-conditioner is not installed described cross valve, determining that the target of described refrigerant reclaims position is described off-premises station; Tip element 2046, when described air-conditioner is provided with described cross valve, the target pointing out described user to select described refrigerant from described indoor set and described indoor set reclaims position; Second determining unit 2048, when receiving the select command of described user to described indoor set, determining that described indoor set is that described target reclaims position, when receiving the select command of described user to described off-premises station, determining that described off-premises station is that described target reclaims position.
The retracting device of air-conditioner coolant according to an embodiment of the invention, when carrying out target recovery position and determining, according to whether air-conditioner being provided with cross valve can determine, if air-conditioner does not install cross valve, now illustrate that this air-conditioner only has refrigerating function, now by refrigerant recovering to off-premises station, can only can not be recycled to indoor set, now determining that target reclaims position is off-premises station.And when air-conditioner being provided with cross valve, now, user's select target can be pointed out to reclaim position, user can select by refrigerant recovering to indoor set or off-premises station according to demands of individuals, thus determines that target reclaims position.
According to one embodiment of present invention, described control unit 206 specifically for: control the closed electromagnetic valve that is arranged on tracheae and/or liquid pipe, to close described air valve and/or described liquid valve; And/or control display unit display reminding information, to close described air valve and/or described liquid valve by user according to described information; Wherein, described display unit is used for showing described information according to the control instruction of described control unit.
The retracting device of air-conditioner coolant according to an embodiment of the invention, when closing the tracheae and liquid pipe that are connected between indoor set and off-premises station, both automatically can be controlled by system, also display reminding information (as with the form of sound and/or light) can be passed through, by maintenance personal's manual-lock.
According to one embodiment of present invention, described control unit 206 also for: after completing described refrigerant recovering, control described air-conditioner and enter breakdown maintenance state, to forbid the power-on operation of described air-conditioner.
The retracting device of air-conditioner coolant according to an embodiment of the invention, in order to ensure the safety of air-conditioning system, after refrigerant-recovery process terminates, controls air-conditioning system and enters breakdown maintenance state, to forbid the power-on operation of air-conditioner.Now maintenance personal can carry out maintenance activity, and after maintenance terminates, open the operating valve on liquid pipe and tracheae, the refrigerant circulation line between indoor set with off-premises station be communicated with, after re-powering, air-conditioning system returns to normal condition.For the air-conditioning system adopting the magnetic valve controlled on liquid pipe and tracheae automatically to carry out liquid pipe and tracheae shutoff operation, can after air-conditioning system releases breakdown maintenance state, service switch is pulled back to and closes gear or closed after refrigerant reclaiming function by remote controller by such as maintenance personal, the magnetic valve that system board controls on liquid pipe and tracheae is automatically opened, after re-powering, air-conditioning system returns to normal condition.
According to one embodiment of present invention, also comprise: setting unit 208, according to the setting command received, described first Preset Time, described first preset temperature changing value, described first preset pressure value, described second Preset Time, described second preset temperature changing value and described second preset pressure value are set.
The recovery method of air-conditioner coolant according to an embodiment of the invention; maintenance personal rule of thumb can arrange the first Preset Time, the first preset temperature changing value, the first preset pressure value, the second Preset Time, the second preset temperature changing value and the second preset pressure value; thus ensure the normal recovery of refrigerant recovering; and after refrigerant recovering completes, stop the work of air-conditioner in time, be in the state of vacuumizing for a long time to avoid compressor.
Fig. 3 shows the structural representation of air-conditioner according to an embodiment of the invention.
As shown in Figure 3, air-conditioner according to an embodiment of the invention, comprise: compressor 1, ventilating temperature controller 2, high-pressure switch 3, cross valve 4, outer blower fan 5, T3 sensor 6, condenser 7, filter 8, electric expansion valve 9, liquid threshold switch 10, indoor fan 11, T2 sensor 12, evaporimeter 13, air valve switch 14, low pressure switch 15 and low-pressure sensor 16 are formed.Below in conjunction with the embodiment of Fig. 4 and Fig. 5, describe technical scheme of the present invention in detail.
Embodiment one
As shown in Figure 4, according to one embodiment of present invention, when target recovery position is off-premises station, the recovery method of air-conditioner coolant comprises:
Step 402, enter refrigerant-recovery mode of operation, " refrigerant-recovery " gear place entered by being arranged on off-premises station of this mode of operation realizes, or entered by the corresponding function button remote control on maintenance personal's dedicated remote control or line control machine, the implementation case is not limited to above three kinds of modes;
Step 404, for by the internal-external machine of electric expansion valve as throttling arrangement 9, all throttling electric expansion valves are opened;
Judged as required by maintenance personal, by refrigerant-recovery to off-premises station or interior machine; To the air-conditioning system of off-premises station, if this air-conditioning is not provided with cross valve 4, namely not there is heat-production functions for need refrigerant-recovery, directly carry out the operation of step 406, for the air-conditioning system being provided with cross valve, carry out cross valve semi-finals power-off, next carry out the operation of step 406;
Step 406, closes liquid threshold switch 10, the valve namely on junction chamber internal-external machine liquid pipe; Turn off liquid pipe manually to be turned off by maintenance personal, also can adopt other designs, such as maintenance personal is by controlling, and automatically enter refrigerant reclaiming function mode of operation, the present invention does not limit concrete shutoff mode;
For the air-conditioning system that great majority are designed with safety precautions in order to enable air-conditioning system carry out refrigerant-recovery process smoothly; control system is also needed to shield the error protection set; such as be vented protection 2; high-low pressure protection 3,15 and other sensor protection; but the compressor current failure protection function that transfinites must be retained remain valid; to stop refrigerant-recovery operation in time when safety failure appears in compressor 1; compressor 1 is shut down, guarantees the safety of compressor and whole air-conditioning system.
Air-conditioning system by cold-producing medium indoor machine be recovered to process need a period of time of off-premises station, now need to judge that refrigerant-recovery is to the situation of off-premises station, to determine whether refrigerant recovering completes;
Wherein, specific testing process can be selected according to the concrete condition of air-conditioning system, judge whether cold-producing medium has reclaimed, namely adopt and detect in two ways:
Step 408, when air-conditioning system detects that indoor evaporator 13 middle portion temperature T2 (being detected by temperature sensor 12) variations in temperature within the time of setting exceedes the temperature T of setting e, and maintain this state and reach setting-up time T safter, judge that refrigerant-recovery is complete, or,
Step 410, when air-conditioning system detects the pressure P of outdoor compressor suction line l(being detected by low-pressure sensor 16) is lower than the low-voltage variation value P of setting s, and maintain this state and reach setting-up time T safter, judge that the whole machine indoor of cold-producing medium is recycled to off-premises station, two kinds of detection modes exist simultaneously, as long as one of them satisfies condition, just judge that the cold-producing medium in indoor set is all recycled to off-premises station.
Wherein, the temperature sensor in the middle part of evaporimeter 13 disposed in the interior is utilized to detect the situation of change of T2, the controller transferred to by the temperature signal detected on system board carries out decomposition operation, for common air-conditioning, evaporimeter middle portion temperature sensor is all exist, after entering the automatic recovery cold-producing medium pattern, when controller detects the time T of indoor evaporator middle portion temperature in setting sthe temperature T of interior rising or reduction setting e, and after detecting that this state arrives setting-up time, judge that the whole machine indoor of cold-producing medium is recycled to off-premises station.In the implementation case, T s, T e, T m, P l, specifically determined voluntarily according to the actual conditions of air-conditioning system by technical staff, and remain in the memory on system board, call for controller.
To the pressure P of outdoor compressor suction line ldetection whether lower than the low-voltage variation value of setting can be divided into two kinds of modes to perform according to the difference of air conditioner structure.That is, for the air-conditioning being provided with low pressure switch 15 on compressor return air pipeline, when low pressure switch 15 action being detected, and after maintaining setting-up time, then can judge that refrigerant-recovery is complete.Belonging to pressure switch be that a kind of to drop to setting threshold value at pressure be can the valve of automatic transfer switch state; namely this threshold value can think above-mentioned low-voltage variation value; the different threshold values corresponding to low pressure switch is different, generally between 0.15MPa to 0.3MPa.And for not installing the air-conditioning system of low pressure switch, then can be arranged on the collection signal of the low-pressure sensor 16 on compressor air suction pipeline by acceptance, by the controller analysis judgment on system board.When the controller on system board detects low-pressure sensor P lsampled pressure P 1lower than the low-voltage variation value of setting, and after maintaining this state arrival setting-up time, judge that the parameter that the complete described low-voltage variation value of refrigerant-recovery can provide according to compressor producer is determined, general difference is little, all between 0.15MPa to 0.3MPa.
In the implementation case, described setting-up time is empirical value, specifically determine according to the duration that the whole machine indoor of cold-producing medium is recycled to off-premises station, general at [10 seconds, 90 seconds] scope in value, technical staff can the air-conditioning system according to different model in R&D process finally be obtained by actual experiment, but preferably not more than 90 seconds, because after cold-producing medium is all recovered to the condenser of off-premises station, compressor operating is vacuumizing under state, if the evacuated time of compressor is long, damage can be caused to compressor.Preferably, 60 seconds can be set as.
Step 412, when judging that refrigerant recovering completes, turns off the air valve switch 14 be connected between air conditioner room unit and off-premises station, controls air-conditioning system and shuts down, terminate refrigerant-recovery process.
In the implementation case, the shutoff of air valve switch 14 can automatically control by air-conditioning system mainboard the magnetic valve be arranged on tracheae and complete, and manual type manual-lock also can be adopted to be arranged on tracheae operating valve and complete.
When adopting the mode of shutoff operation valve manually to turn off tracheae, in order to indicate the operation of maintenance personal, following process can be adopted:
Air-conditioning system is after the cold-producing medium of indoor set is all recovered to off-premises station; the suggestion device of control device on off-premises station runs; described suggestion device can be charactron, LED light or buzzer etc.; prompting maintenance personal carry out step 412; operating valve on tracheae is closed; and within [10 ~ 60] second, enter to control air-conditioning system shutdown, refrigerant-recovery operation terminates.This process by staff's power themselves down, also can be passed through control system, make air-conditioning auto-breaking.
Described [10-60] second is unsuitable long, as long as can ensure the free shutoff operation valve of maintenance personal, generally should be less than 60 seconds, be in the state of vacuumizing for a long time to avoid compressor.In the implementation case, described [10-60] second is preferably set to 30 seconds.
Step 414, controls air-conditioner and enters breakdown maintenance state, forbid the power-on operation of air-conditioner, until after air-conditioning system re-powers recovery.
In order to ensure the safety of air-conditioning system, after refrigerant-recovery process terminates, control air-conditioning system and enter breakdown maintenance state, to forbid the power-on operation of air-conditioner.Now maintenance personal can carry out maintenance activity, and after maintenance terminates, open the operating valve on liquid pipe and tracheae, the refrigerant circulation line between indoor set with off-premises station be communicated with, after re-powering, air-conditioning system returns to normal condition.For the air-conditioning system adopting the magnetic valve controlled on liquid pipe and tracheae automatically to carry out liquid pipe and tracheae shutoff operation, can after air-conditioning system releases breakdown maintenance state, service switch is pulled back to and closes gear or closed after refrigerant reclaiming function by remote controller by such as maintenance personal, the magnetic valve that system board controls on liquid pipe and tracheae is automatically opened, after re-powering, air-conditioning system returns to normal condition.
Embodiment two
As shown in Figure 5, according to one embodiment of present invention, target reclaim position be off-premises station or indoor set time, the recovery method of air-conditioner coolant comprises:
Step 502, when air-conditioning maintenance personnel determine to carry out the reclaimer operation of cold-producing medium, by the controller on remote controller or Electrical Control plate disposed in the outdoor, opens refrigerant reclaiming function;
Step 504, for the air-conditioning system that electric expansion valve 9 is housed in indoor and outdoor machine, opens the electric expansion valve 9 in indoor and outdoor machine simultaneously;
Step 506, determines by refrigerant recovering to indoor set or off-premises station by maintenance personal, is recycled to off-premises station, then enters step 508 if select, otherwise, enter step 520.
Step 508, cross valve 4 power-off, closes refrigeration air valve and namely heats liquid valve 14.
Step 510, judges whether the pressure P on air suction pipes of compressor of outdoor road llower than the low-voltage variation value P of setting s, and maintain this state arrival setting-up time, when judged result is for being, enter step 514.
Step 512, judges whether the time T of indoor evaporator 13 middle portion temperature T2 in setting to be detected sinterior rising or decrease beyond the temperature value T of setting e, when judged result is for being, enter step 514.
Wherein, described setting-up time T sthe duration being recycled to off-premises station according to the whole machine indoor of cold-producing medium is needed specifically to determine; T scan in the scope of (30-90 second, preferably 50 seconds) value.
T2 detects by temperature sensor 12 on machine evaporimeter 13 disposed in the outdoor;
P ldetect by the low-pressure sensor 16 on machine compressor air suction pipeline disposed in the outdoor.
Step 514, the refrigerating fluid valve turned off when being connected to air conditioner heat-production between indoor and outdoor machine heats air valve 10;
Step 516, controls air-conditioning system and shuts down, terminate refrigerant-recovery process;
Step 518, air-conditioning system enters breakdown maintenance state.
Step 520, cross valve is forced to power on.
Step 522, closes liquid threshold switch 14.
Step 524, judges whether the pressure P on air suction pipes of compressor of outdoor road llower than the low-voltage variation value P of setting s, and maintain this state arrival setting-up time, when judged result is for being, enter step 514.
Step 526, judges whether the time T of outdoor condenser 7 middle portion temperature T3 in setting to be detected sinterior rising or decrease beyond the temperature value T of setting e, when judged result is for being, enter step 514.
Wherein, described setting-up time T sthe duration being recycled to off-premises station according to the whole machine indoor of cold-producing medium is needed specifically to determine; T scan in the scope of (30-90 second, preferably 50 seconds) value.
T3 detects by temperature sensor 6 on machine condenser 7 disposed in the interior;
P ldetect by the low-pressure sensor 16 on machine compressor air suction pipeline disposed in the outdoor.
Step 528, the refrigerating fluid valve turned off when being connected to air conditioner heat-production between indoor and outdoor machine heats air valve 10;
Step 530, controls air-conditioning system and shuts down, terminate refrigerant-recovery process;
Step 532, air-conditioning system enters breakdown maintenance state.
Wherein, for the turn off process of described liquid valve 10 and air valve switch 14, the operating valve that can be arranged on liquid pipe or tracheae by maintenance personal's manual-lock realizes, and also can automatically control by air-conditioning system master control borad the closed electromagnetic valve be arranged on liquid pipe or tracheae and realize.
When adopting manual mode to turn off described air valve, described air-conditioning system is after refrigerant-recovery completes, and the suggestion device of control device on off-premises station runs, and prompting maintenance personal closes the operating valve on tracheae.
More than be described with reference to the accompanying drawings technical scheme of the present invention, by technical scheme of the present invention, be convenient to the reclaimer operation carrying out cold-producing medium that maintenance personal is safe and reliable, avoid refrigerant-recovery insufficient or cause the generation of the problems such as compressor fault, decrease the discharge of cold-producing medium, reduce maintenance cost.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. the recovery method of an air-conditioner coolant, described air-conditioner comprises indoor set and off-premises station, the air valve for mutually transmitting refrigerant and liquid valve is connected with between described indoor set and described off-premises station, electric expansion valve between the heat exchanger being also provided with the heat exchanger being connected to described indoor set and described off-premises station in described indoor set, it is characterized in that, comprising:
When receiving the recovery command to described refrigerant, open described electric expansion valve;
Determine that the target of described refrigerant reclaims position according to described recovery command;
If it is described off-premises station that described target reclaims position, then close described liquid valve, control described air-conditioner and carry out work in a chiller mode, and detect the first temperature change value of the evaporimeter in described indoor set, or the first force value detected in the suction line of the compressor in described off-premises station, and detecting that described first temperature change value of described evaporimeter is more than or equal to the first preset temperature changing value in the first Preset Time, or the time that described first force value is less than the first preset pressure value is when equaling described first Preset Time, then close described air valve, and control described air-conditioner and quit work, to complete the recovery of described refrigerant,
If it is described indoor set that described target reclaims position, then close described air valve, control described air-conditioner and carry out work with heating mode, and detect the second temperature change value of the condenser in described off-premises station, or the second force value detected in the suction line of described compressor, and detecting that described second temperature change value of described condenser is more than or equal to the second preset temperature changing value in the second Preset Time, or the time that described second force value is less than the second preset pressure value is when equaling described second Preset Time, then close described liquid valve, and control described air-conditioner and quit work, to complete the recovery of described refrigerant.
2. the recovery method of air-conditioner coolant according to claim 1, is characterized in that, specifies the target determining described refrigerant to reclaim position, specifically comprise according to described recovery:
Judge whether described air-conditioner is provided with cross valve;
When described air-conditioner is not installed described cross valve, determining that the target of described refrigerant reclaims position is described off-premises station;
When described air-conditioner is provided with described cross valve, prompting user selects the target of described refrigerant to reclaim position from described indoor set and described indoor set;
When receiving the select command of described user to described indoor set, determining that described indoor set is that described target reclaims position, when receiving the select command of described user to described off-premises station, determining that described off-premises station is that described target reclaims position.
3. the recovery method of air-conditioner coolant according to claim 1, is characterized in that, the step of closing described tracheae and/or described liquid pipe is specially:
By controlling the closed electromagnetic valve be arranged on tracheae and/or liquid pipe, to close described air valve and/or described liquid valve; And/or display reminding information, to close described air valve and/or described liquid valve by user according to described information.
4. the recovery method of air-conditioner coolant according to claim 1, is characterized in that, also comprises:
After completing described refrigerant recovering, control described air-conditioner and enter breakdown maintenance state, to forbid the power-on operation of described air-conditioner.
5. the recovery method of air-conditioner coolant according to any one of claim 1 to 4, is characterized in that, also comprises:
According to the setting command received, described first Preset Time, described first preset temperature changing value, described first preset pressure value, described second Preset Time, described second preset temperature changing value and described second preset pressure value are set.
6. the retracting device of an air-conditioner coolant, described air-conditioner comprises indoor set and off-premises station, the air valve for mutually transmitting refrigerant and liquid valve is connected with between described indoor set and described off-premises station, electric expansion valve between the heat exchanger being also provided with the heat exchanger being connected to described indoor set and described off-premises station in described indoor set, it is characterized in that, comprising:
Processing unit, when receiving the recovery command to described refrigerant, opens described electric expansion valve;
According to described recovery command, determining unit, determines that the target of described refrigerant reclaims position;
Control unit, if it is described off-premises station that described target reclaims position, then close described liquid valve, control described air-conditioner and carry out work in a chiller mode, and detect the first temperature change value of the evaporimeter in described indoor set, or the first force value detected in the suction line of the compressor in described off-premises station, and detecting that described first temperature change value of described evaporimeter is more than or equal to the first preset temperature changing value in the first Preset Time, or the time that described first force value is less than the first preset pressure value is when equaling described first Preset Time, then close described air valve, and control described air-conditioner and quit work, to complete the recovery of described refrigerant,
If it is described indoor set that described target reclaims position, then close described air valve, control described air-conditioner and carry out work with heating mode, and detect the second temperature change value of the condenser in described off-premises station, or the second force value detected in the suction line of described compressor, and detecting that described second temperature change value of described condenser is more than or equal to the second preset temperature changing value in the second Preset Time, or the time that described second force value is less than the second preset pressure value is when equaling described second Preset Time, then close described liquid valve, and control described air-conditioner and quit work, to complete the recovery of described refrigerant.
7. the retracting device of air-conditioner coolant according to claim 6, is characterized in that, described determining unit specifically comprises:
Judging unit, judges whether described air-conditioner is provided with cross valve;
First determining unit, when described air-conditioner is not installed described cross valve, determining that the target of described refrigerant reclaims position is described off-premises station;
Tip element, when described air-conditioner is provided with described cross valve, the target pointing out described user to select described refrigerant from described indoor set and described indoor set reclaims position;
Second determining unit, when receiving the select command of described user to described indoor set, determining that described indoor set is that described target reclaims position, when receiving the select command of described user to described off-premises station, determining that described off-premises station is that described target reclaims position.
8. the retracting device of air-conditioner coolant according to claim 6, is characterized in that, described control unit specifically for:
Control the closed electromagnetic valve be arranged on tracheae and/or liquid pipe, to close described air valve and/or described liquid valve; And/or control display unit display reminding information, to close described air valve and/or described liquid valve by user according to described information;
Wherein, described display unit is used for showing described information according to the control instruction of described control unit.
9. the retracting device of air-conditioner coolant according to claim 6, is characterized in that, described control unit also for:
After completing described refrigerant recovering, control described air-conditioner and enter breakdown maintenance state, to forbid the power-on operation of described air-conditioner.
10. the retracting device of the air-conditioner coolant according to any one of claim 6 to 9, is characterized in that, also comprises:
Setting unit, according to the setting command received, arranges described first Preset Time, described first preset temperature changing value, described first preset pressure value, described second Preset Time, described second preset temperature changing value and described second preset pressure value.
CN201410655802.6A 2014-11-17 2014-11-17 Method and device for recovering air conditioner coolants CN104457054B (en)

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CN110173813A (en) * 2019-05-30 2019-08-27 广东美的制冷设备有限公司 Air conditioner and its control method and device
CN110260420A (en) * 2019-06-04 2019-09-20 珠海格力电器股份有限公司 Air-conditioning and air conditioner coolant recycling and control method
CN110500720A (en) * 2019-08-23 2019-11-26 宁波奥克斯电气股份有限公司 A kind of air-conditioning receives control method, system, storage medium and the air-conditioning of liquid prompting
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CN110762718A (en) * 2018-07-28 2020-02-07 青岛海尔空调器有限总公司 Self-cleaning control method for air conditioner
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CN105485771B (en) * 2016-01-04 2018-12-07 广东美的暖通设备有限公司 Air-conditioning system and its refrigerant recovering control method and device
CN105485771A (en) * 2016-01-04 2016-04-13 广东美的暖通设备有限公司 Air conditioner system and refrigerant recycling control method and device thereof
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CN107504640A (en) * 2017-08-21 2017-12-22 广东美的制冷设备有限公司 Air-conditioning system, air conditioner and refrigerant recovering control method
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CN110762720A (en) * 2018-07-28 2020-02-07 青岛海尔空调器有限总公司 Self-cleaning control method for air conditioner
CN110762719A (en) * 2018-07-28 2020-02-07 青岛海尔空调器有限总公司 Self-cleaning control method for air conditioner
CN110762718A (en) * 2018-07-28 2020-02-07 青岛海尔空调器有限总公司 Self-cleaning control method for air conditioner
CN109798625A (en) * 2018-12-29 2019-05-24 珠海格力电器股份有限公司 A kind of refrigerant recovering method, apparatus and air conditioner
CN110173813A (en) * 2019-05-30 2019-08-27 广东美的制冷设备有限公司 Air conditioner and its control method and device
CN110260420A (en) * 2019-06-04 2019-09-20 珠海格力电器股份有限公司 Air-conditioning and air conditioner coolant recycling and control method
CN110500720A (en) * 2019-08-23 2019-11-26 宁波奥克斯电气股份有限公司 A kind of air-conditioning receives control method, system, storage medium and the air-conditioning of liquid prompting
CN110542190A (en) * 2019-09-12 2019-12-06 广东美的制冷设备有限公司 operation control method, operation control device, air conditioner, and storage medium
CN110822664A (en) * 2019-11-27 2020-02-21 广东美的制冷设备有限公司 Refrigerant recovery method and system of air conditioner and air conditioner
CN110940039A (en) * 2019-12-16 2020-03-31 宁波奥克斯电气股份有限公司 High-temperature liquid-collecting multi-split refrigerant recovery method and device and multi-split system
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