CN103424244B - Outdoor unit valve detection method of variable-frequency multi-connected air conditioner and variable-frequency multi-connected air conditioner - Google Patents
Outdoor unit valve detection method of variable-frequency multi-connected air conditioner and variable-frequency multi-connected air conditioner Download PDFInfo
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- CN103424244B CN103424244B CN201210161578.6A CN201210161578A CN103424244B CN 103424244 B CN103424244 B CN 103424244B CN 201210161578 A CN201210161578 A CN 201210161578A CN 103424244 B CN103424244 B CN 103424244B
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- 238000004378 air conditioning Methods 0.000 description 3
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Abstract
The invention discloses an outdoor unit valve detection method of a variable-frequency multi-connected air conditioner and the variable-frequency multi-connected air conditioner; the method for detecting the outdoor unit valve of the variable-frequency multi-connected air conditioner comprises the following steps of: step S100: controlling the variable-frequency multi-connected air conditioner to enter an outdoor unit valve detection mode to operate; step S200: controlling the outdoor unit to enter a first running state or a second running state and detecting running data according to the external environment temperature of the outdoor unit; and comparing the detected operation data of the first operation state or the second operation state with a set judgment condition, and judging the states of a high-pressure valve and a low-pressure valve of the outdoor unit. The variable-frequency multi-connected air conditioner comprises a temperature sensor, a timer, a first pressure gauge, a second pressure gauge and a control unit, wherein the control unit is used for realizing the outdoor unit valve detection method. The invention realizes the detection of the outdoor valve conveniently by adding simple elements.
Description
Technical field
The present invention relates to multi-evaporator inverter air conditioner, particularly relate to a kind of the off-premises station valve detection method and the multi-evaporator inverter air conditioner that are applicable to multi-evaporator inverter air conditioner.
Background technology
Multi-evaporator inverter air conditioner is the abbreviation of " many variable refrigerant volume central air conditioner is dragged in frequency conversion one ", take cold-producing medium as pumped (conveying) medium, belongs to air-air heat pump system.An off-premises station can to several indoor set refrigerant conveying liquid (being generally made up of an off-premises station and 3-16 platform indoor set) by pipeline, by controlling the circulating mass of refrigerant of compressor and entering the refrigerant flow of each heat interchanger indoor, indoor cooling and heating load requirement in time can be met.It is a kind of novel variable-flow central air conditioner technology, overcomes many drawbacks of traditional water system central air conditioner, has significantly advanced and distinctive feature, so once appearance, obtains the extensive accreditation of world's air-conditioning circle immediately.
At present, in central air conditioner, computing machine widely use the intellectuality realizing control mode; But do not realize intellectuality to the detection of the off-premises station valve of central air conditioner (comprising multi-evaporator inverter air conditioner), the detection realizing off-premises station valve needs the time longer.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art part, the off-premises station valve detection existed for multi-evaporator inverter air conditioner does not realize intelligentized technical matters, provides a kind of off-premises station valve detection method and multi-evaporator inverter air conditioner of multi-evaporator inverter air conditioner.
The invention provides a kind of off-premises station valve detection method of multi-evaporator inverter air conditioner, comprise the steps: step S100: control to run under multi-evaporator inverter air conditioner enters off-premises station valve detection pattern, under off-premises station valve detection pattern, control all indoor set enforced opening refrigerating operatons, described multi-evaporator inverter air conditioner can set up the pressure differential of high pressure valve and low pressure valve in described off-premises station valve detection pattern; Step S200: according to the ambient temperature at off-premises station place, controls described off-premises station and enters the first running status or the second running status and detect service data; The first running status detected or the service data of the second running status are compared with the Rule of judgment of setting, judges the high pressure valve of described off-premises station and the state of low pressure valve;
Wherein, under the first running status, the blower fan of described off-premises station is forced out of service, and the frequency-changeable compressor of described off-premises station is forced with 35 hertz of operations; Under the second running status, the blower fan of described off-premises station is forced with 20 hertz of operations, and the frequency-changeable compressor of off-premises station is forced with 30 hertz of operations;
First running status of described off-premises station or the second running status can set up the pressure differential of high pressure valve and low pressure valve at different temperatures;
Described service data comprises the working time of the frequency-changeable compressor of described off-premises station, and the high pressure valve of described off-premises station and the pressure differential of low pressure valve.
Present invention also offers a kind of multi-evaporator inverter air conditioner, comprise off-premises station and multiple stage indoor set, the high pressure valve of described off-premises station is connected with described multiple stage indoor set by refrigerant passage respectively with low pressure valve; Described multi-evaporator inverter air conditioner also comprises control module, described control module and communicating to connect between described off-premises station and indoor set, run under described multi-evaporator inverter air conditioner enters off-premises station valve detection pattern for controlling, under off-premises station valve detection pattern, control all indoor set enforced opening refrigerating operatons, described multi-evaporator inverter air conditioner can set up the pressure differential of high pressure valve and low pressure valve in described off-premises station valve detection pattern; Described control module, also for the ambient temperature according to off-premises station place, controls described off-premises station and enters the first running status or the second running status and detect service data; Described control module also for the detect first running status or the service data of the second running status being compared with the Rule of judgment of setting, judges the high pressure valve of described off-premises station and the state of low pressure valve; Wherein, under the first running status, the blower fan of described off-premises station is forced out of service, and the frequency-changeable compressor of described off-premises station is forced with 35 hertz of operations; Under the second running status, the blower fan of described off-premises station is forced with 20 hertz of operations, and the frequency-changeable compressor of off-premises station is forced with 30 hertz of operations;
First running status of described off-premises station or the second running status can set up the pressure differential of high pressure valve and low pressure valve at different temperatures;
Described service data comprises the working time of the frequency-changeable compressor of described off-premises station, and the high pressure valve of described off-premises station and the pressure differential of low pressure valve.
The off-premises station valve detection method of multi-evaporator inverter air conditioner of the present invention, achieves the intellectuality of the detection of off-premises station valve, makes off-premises station valve detection simple, is easy to realize; Meanwhile, off-premises station valve detection is realized at short notice.
Multi-evaporator inverter air conditioner of the present invention, by increasing simple element, achieving the detection of off-premises station valve easily and realizing off-premises station valve detection at short notice; Reach the robotization of off-premises station valve detection, dirigibility and ease for operation, fully meet user and control to detect robotization demand to multi-evaporator inverter air conditioner.
Accompanying drawing explanation
In order to make technical scheme of the present invention, the technical matters solved and beneficial effect are clearly understood, below in conjunction with drawings and Examples, are further elaborated to the off-premises station valve detection method of multi-evaporator inverter air conditioner of the present invention and multi-evaporator inverter air conditioner.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Fig. 1 is the process flow diagram of an embodiment of the off-premises station valve detection method of multi-evaporator inverter air conditioner of the present invention.
Embodiment
The off-premises station valve detection method of multi-evaporator inverter air conditioner of the present invention, described multi-evaporator inverter air conditioner comprises off-premises station and multiple stage indoor set, comprises the steps:
Step S100: control to run under multi-evaporator inverter air conditioner enters off-premises station valve detection pattern;
Step S200: according to the ambient temperature at off-premises station place, controls described off-premises station and enters the first running status or the second running status and detect service data;
The first running status detected or the service data of the second running status are compared with the Rule of judgment of setting, judges the high pressure valve of described off-premises station and the state of low pressure valve.
Wherein, the Rule of judgment of setting comprises off-premises station and enters the first Rule of judgment under the first running status and the second Rule of judgment, and off-premises station enters the 3rd Rule of judgment under the second running status and the 4th Rule of judgment.
Preferably, described multi-evaporator inverter air conditioner can set up the pressure differential of high pressure valve and low pressure valve fast in described off-premises station valve detection pattern;
First running status of described off-premises station or the second running status can set up the pressure differential of high pressure valve and low pressure valve at different temperatures fast.According to the difference of the ambient temperature at off-premises station place, control described off-premises station and enter the first running status or the different running status of the second running status two kinds, make when ambient temperature different, the high pressure valve of off-premises station and the pressure differential of low pressure valve can be set up fast, and then provide condition for realizing off-premises station valve detection at short notice.
Preferably, comprise the steps: in described step S100
Control all indoor set enforced opening refrigerating operatons; The object of refrigerating operaton is selected to be to set up the high pressure valve of off-premises station and the pressure differential of low pressure valve fast; When heating the high pressure valve of off-premises station and the pressure differential of low pressure valve smaller, not easily judge.The pressure differential of the high pressure valve and low pressure valve of setting up off-premises station fast provides condition for realizing off-premises station valve detection at short notice.
The electric expansion valve controlling all indoor sets performs a reset operation, after reset completes, (full scale of electric expansion valve is 2000 steps to fixing step number 430 ~ 530 step, when 430 ~ 530 step, refrigerant flowing is than very fast, and the high pressure valve of off-premises station and the pressure differential ratio of low pressure valve are easier to set up);
The wind shelves controlling all indoor sets are set as high wind shelves;
The electric expansion valve that heats controlling described off-premises station performs a reset operation, and resetted rear fixing step number 430 ~ 530 step;
The subcooler electric expansion valve controlling described off-premises station performs a reset operation, and resetted rear initial step number 0 step;
The four-way valve controlling described off-premises station keeps power down always.
Preferably, comprise the steps: in described step S100
Control all indoor set enforced opening refrigerating operatons; The object of refrigerating operaton is selected to be to set up the high pressure valve of off-premises station and the pressure differential of low pressure valve fast; When heating the high pressure valve of off-premises station and the pressure differential of low pressure valve smaller, not easily judge.The pressure differential of the high pressure valve and low pressure valve of setting up off-premises station fast provides condition for realizing off-premises station valve detection at short notice.
The electric expansion valve controlling all indoor sets performs a reset operation, after reset completes, (full scale of electric expansion valve is 2000 steps to fixing step number 480 step, when 480 step, refrigerant flowing is fast, and the high pressure valve of off-premises station and the pressure differential of low pressure valve are easily set up);
The wind shelves controlling all indoor sets are set as high wind shelves;
The electric expansion valve that heats controlling described off-premises station performs a reset operation, and resetted rear fixing step number 480 step;
The subcooler electric expansion valve controlling described off-premises station performs a reset operation, and resetted rear initial step number 0 step;
The four-way valve controlling described off-premises station keeps power down always, flows to change to prevent refrigerant.
Preferably, described step S200 comprises the steps:
Step S210: whether judge ambient temperature≤0 DEG C;
When ambient temperature≤0 DEG C, enter step S220; Otherwise, enter step S230;
Step S220: described off-premises station enters the first running status: the blower fan of off-premises station is forced out of service, the frequency-changeable compressor of off-premises station is forced with 35 hertz of operations (if off-premises station comprises invariable frequency compressor, then all invariable frequency compressors are forced out of service); Detect the service data of described off-premises station in the first running status;
Wherein, described service data comprises the working time of the frequency-changeable compressor of described off-premises station, and the high pressure valve of described off-premises station and the pressure differential of low pressure valve;
Step S221: the service data of the first running status detected is compared with the first Rule of judgment of setting and the second Rule of judgment;
When first reaching the first Rule of judgment the working time of described frequency-changeable compressor, described frequency-changeable compressor is stopped to run; Then judge that high pressure valve and the low pressure valve state of described off-premises station are normal;
When the high pressure valve of described off-premises station and the pressure differential of low pressure valve first reach the second Rule of judgment, described frequency-changeable compressor is stopped to run; Then judge high pressure valve and the low pressure valve abnormal state of described off-premises station;
Wherein, described first Rule of judgment is: accumulative 135 seconds of frequency-changeable compressor continuous operating time; Described second Rule of judgment is: the refrigerant saturation pressure of the multi-evaporator inverter air conditioner that [high pressure valve high pressure P d]-[low pressure valve low pressure Ps] >=15 DEG C is corresponding;
Step S230: described off-premises station enters the second running status: the blower fan of described off-premises station is forced with 20 hertz of operations, the frequency-changeable compressor of off-premises station is forced with 30 hertz of operations (if off-premises station comprises invariable frequency compressor, then all invariable frequency compressors are forced out of service); Detect the service data of off-premises station in the second running status;
Wherein, described service data comprises the working time of the frequency-changeable compressor of described multi-evaporator inverter air conditioner, and the high pressure valve of described off-premises station and the pressure differential of low pressure valve;
Step S231: the 3rd Rule of judgment of the service data of the second running status detected and setting and the 4th Rule of judgment are compared;
When first reaching the 3rd Rule of judgment the working time of described frequency-changeable compressor, stop the fan operation of frequency-changeable compressor and off-premises station; Then judge that high pressure valve and the low pressure valve state of described off-premises station are normal;
When the high pressure valve of described off-premises station and the pressure differential of low pressure valve first reach the 4th Rule of judgment, stop the fan operation of frequency-changeable compressor and off-premises station; Then judge high pressure valve and the low pressure valve abnormal state of described off-premises station;
Wherein, described 3rd Rule of judgment is: accumulative 135 seconds of frequency-changeable compressor continuous operating time; Described 4th Rule of judgment is: the refrigerant saturation pressure of the multi-evaporator inverter air conditioner that [high pressure valve high pressure P d]-[low pressure valve low pressure Ps] >=20 DEG C is corresponding.
According to the difference of the ambient temperature at off-premises station place, control described off-premises station and enter the first running status or the different running status of the second running status two kinds, make when ambient temperature different, the high pressure valve of off-premises station and the pressure differential of low pressure valve can be set up fast, and then provide condition for realizing off-premises station valve detection at short notice.
Preferably, after described step S200, also comprise the steps:
When the high pressure valve of described off-premises station and low pressure valve state normal time, described multi-evaporator inverter air conditioner reverts to holding state;
When high pressure valve and the low pressure valve abnormal state of described off-premises station, prompting checks whether the high pressure valve of off-premises station and low pressure valve are opened; After unlatching, return operating procedure S100 ~ S200.
Off-premises station valve detection method of the present invention, achieves the detection of off-premises station valve simply; Reach the robotization of off-premises station valve detection, dirigibility and ease for operation, fully meet user and robotization demand is detected to airconditioning control.
As shown in Figure 1, the operational scheme being applicable to an embodiment of the off-premises station valve detection method of multi-evaporator inverter air conditioner of the present invention is as follows:
Step 1: multi-evaporator inverter air conditioner is started shooting;
Step 2: control to run under multi-evaporator inverter air conditioner enters off-premises station valve detection pattern:
Control all indoor set enforced opening refrigerating operatons and (for set up the high pressure valve of off-premises station and the pressure differential of low pressure valve fast, select refrigerating operaton; When heating the high pressure valve of off-premises station and the pressure differential of low pressure valve smaller, not easily judge); The electric expansion valve controlling all indoor sets performs a reset operation, after reset completes, (full scale of electric expansion valve is 2000 steps to fixing step number 480 step, when 480 step, refrigerant flowing is fast, and the high pressure valve of off-premises station and the pressure differential of low pressure valve are easily set up); The wind shelves controlling all indoor sets are set as high wind shelves;
The electric expansion valve that heats controlling off-premises station performs a reset operation, and resetted rear fixing step number 480 step; The subcooler electric expansion valve controlling off-premises station performs a reset operation, and resetted rear initial step number 0 step; The four-way valve controlling off-premises station keeps power down always, flows to change to prevent refrigerant.
Step 3: the ambient temperature whether≤0 DEG C judging off-premises station place;
When ambient temperature≤0 DEG C at off-premises station place, off-premises station enters the first running status: the blower fan of off-premises station is forced out of service, the frequency-changeable compressor of off-premises station is forced with 35 hertz of operations (if off-premises station comprises invariable frequency compressor, then all invariable frequency compressors are forced out of service); Detect the service data of off-premises station in the first running status; Wherein, described service data comprises the working time of frequency-changeable compressor, and the high pressure valve of off-premises station and the pressure differential of low pressure valve;
The service data of the first running status detected is compared with the first Rule of judgment of setting and the second Rule of judgment;
When first reaching the first Rule of judgment the working time of the frequency-changeable compressor in service data, frequency-changeable compressor is stopped to run; Then judge that high pressure valve and the low pressure valve state of off-premises station are normal;
When the high pressure valve of the off-premises station in service data and the pressure differential of low pressure valve first reach the second Rule of judgment, frequency-changeable compressor is stopped to run; Then judge high pressure valve and the low pressure valve abnormal state of off-premises station;
Wherein, the first Rule of judgment is: accumulative 135 seconds of frequency-changeable compressor continuous operating time; Second Rule of judgment is: the refrigerant saturation pressure of the multi-evaporator inverter air conditioner that [high pressure valve high pressure P d]-[low pressure valve low pressure Ps] >=15 DEG C is corresponding.
As the ambient temperature > 0 DEG C at off-premises station place, off-premises station enters the second running status: the blower fan of off-premises station is forced with 20 hertz of operations, the frequency-changeable compressor of off-premises station is forced with 30 hertz of operations (if off-premises station comprises invariable frequency compressor, then all invariable frequency compressors are forced out of service); Detect the service data of off-premises station in the second running status;
3rd Rule of judgment of the service data of the second running status detected and setting and the 4th Rule of judgment are compared;
When first reaching the 3rd Rule of judgment the working time of the frequency-changeable compressor in service data, stop frequency-changeable compressor and off-premises station fan operation; Judge that high pressure valve and the low pressure valve state of off-premises station are normal; Off-premises station valve detection completes; Described multi-evaporator inverter air conditioner reverts to holding state;
When the high pressure valve of the off-premises station in service data and the pressure differential of low pressure valve first reach the 4th Rule of judgment, stop frequency-changeable compressor and off-premises station fan operation, judge high pressure valve and the low pressure valve abnormal state of off-premises station; Prompting checks whether the high pressure valve of off-premises station and low pressure valve are opened; After unlatching, operating procedure 2;
Wherein, the 3rd Rule of judgment is: accumulative 135 seconds of frequency-changeable compressor continuous operating time; 4th Rule of judgment is: the refrigerant saturation pressure of the multi-evaporator inverter air conditioner that [high pressure valve high pressure P d]-[low pressure valve low pressure Ps] >=20 DEG C is corresponding.
A kind of multi-evaporator inverter air conditioner of the present invention, comprises off-premises station and multiple stage indoor set, and the high pressure valve of off-premises station is connected with multiple stage indoor set by refrigerant passage respectively with low pressure valve;
Described multi-evaporator inverter air conditioner also comprises control module, described control module and communicating to connect between described off-premises station and indoor set, runs under described multi-evaporator inverter air conditioner enters off-premises station valve detection pattern for controlling;
Described control module, also for the ambient temperature according to off-premises station place, controls described off-premises station and enters the first running status or the second running status and detect service data;
Described control module also for the detect first running status or the service data of the second running status being compared with the Rule of judgment of setting, judges the high pressure valve of described off-premises station and the state of low pressure valve.
Preferably, described multi-evaporator inverter air conditioner also comprises temperature inductor, timer, the first pressure device and the second pressure device; Described temperature inductor is for detecting the ambient temperature at described off-premises station place and detected ambient temperature being transferred to described control module; Described timer is for measuring the working time of the frequency-changeable compressor of described off-premises station and measured working time being transferred to described control module; Described first pressure device for measure off-premises station high pressure valve pressure and by the high pressure valve pressure transmission of measured off-premises station give described control module; Described second pressure device for measure off-premises station low pressure valve pressure and by the low pressure valve pressure transmission of measured off-premises station give described control module.
Preferably, under multi-evaporator inverter air conditioner enters off-premises station valve detection pattern, controlled by described control module: described control module, also for the ambient temperature according to off-premises station place, controls described off-premises station and enters the first running status or the second running status and detect service data;
Described control module also for the detect first running status or the service data of the second running status being compared with the Rule of judgment of setting, judges the high pressure valve of described off-premises station and the state of low pressure valve.
Preferably, under described control module control multi-evaporator inverter air conditioner enters off-premises station valve detection pattern:
All indoor set enforced opening refrigerating operatons;
The electric expansion valve of all indoor sets performs a reset operation, and resetted rear fixing step number 480 step;
The wind shelves of all indoor sets are set as high wind shelves;
The electric expansion valve that heats of described off-premises station performs a reset operation, and resetted rear fixing step number 480 step;
The subcooler electric expansion valve of described off-premises station performs a reset operation, and resetted rear initial step number 0 step;
The four-way valve of described off-premises station keeps power down always.
Preferably, described control module, according to the ambient temperature at off-premises station place, controls described off-premises station and enters the first running status or the second running status and to detect service data as follows:
When ambient temperature≤0 DEG C; Described control module controls described off-premises station and enters the first running status: the blower fan of off-premises station is forced out of service, and the frequency-changeable compressor of off-premises station is forced with 35 hertz of operations; Detect the service data of described off-premises station in the first running status;
As ambient temperature > 0 DEG C; Described control module controls described off-premises station and enters the second running status: the blower fan of described off-premises station is forced with 20 hertz of operations, and the frequency-changeable compressor of off-premises station is forced with 30 hertz of operations; Detect the service data of off-premises station in the second running status;
Wherein, described service data comprises the working time of the frequency-changeable compressor of described multi-evaporator inverter air conditioner, and the high pressure valve of described off-premises station and the pressure differential of low pressure valve.
Preferably, the first running status detected or the service data of the second running status compare with the Rule of judgment of setting by described control module, judge that the state of the high pressure valve of described off-premises station and low pressure valve is as follows:
The service data of the first running status detected compares with the first Rule of judgment of setting and the second Rule of judgment by described control module;
When first reaching the first Rule of judgment the working time of described frequency-changeable compressor, described frequency-changeable compressor is stopped to run; Then described control module judge the high pressure valve of described off-premises station and low pressure valve state normal;
When the high pressure valve of described off-premises station and the pressure differential of low pressure valve first reach the second Rule of judgment, described frequency-changeable compressor is stopped to run; Then described control module judges high pressure valve and the low pressure valve abnormal state of described off-premises station;
Wherein, described first Rule of judgment is: accumulative 135 seconds of frequency-changeable compressor continuous operating time; Described second Rule of judgment is: the refrigerant saturation pressure of the multi-evaporator inverter air conditioner that [high pressure valve high pressure P d]-[low pressure valve low pressure Ps] >=15 DEG C is corresponding;
3rd Rule of judgment of the service data of the second running status detected and setting and the 4th Rule of judgment compare by described control module;
When first reaching the 3rd Rule of judgment the working time of described frequency-changeable compressor, stop the fan operation of frequency-changeable compressor and off-premises station; Then described control module judge the high pressure valve of described off-premises station and low pressure valve state normal;
When the high pressure valve of described off-premises station and the pressure differential of low pressure valve first reach the 4th Rule of judgment, stop the fan operation of frequency-changeable compressor and off-premises station; Then described control module judges high pressure valve and the low pressure valve abnormal state of described off-premises station;
Wherein, described 3rd Rule of judgment is: accumulative 135 seconds of frequency-changeable compressor continuous operating time; Described 4th Rule of judgment is: the refrigerant saturation pressure of the multi-evaporator inverter air conditioner that [high pressure valve high pressure P d]-[low pressure valve low pressure Ps] >=20 DEG C is corresponding.
Preferably, described control module is computing machine or single-chip microcomputer or embedded dsp.
Multi-evaporator inverter air conditioner of the present invention, by increasing simple element, achieves the detection of off-premises station valve easily; Reach the robotization of off-premises station valve detection, dirigibility and ease for operation, fully meet user and robotization demand is detected to airconditioning control.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (11)
1. an off-premises station valve detection method for multi-evaporator inverter air conditioner, described multi-evaporator inverter air conditioner comprises off-premises station, it is characterized in that, comprises the steps:
Step S100: control to run under multi-evaporator inverter air conditioner enters off-premises station valve detection pattern; All indoor set enforced opening refrigerating operatons are controlled under off-premises station valve detection pattern; Described multi-evaporator inverter air conditioner can set up the pressure differential of high pressure valve and low pressure valve in described off-premises station valve detection pattern;
Step S200: according to the ambient temperature at described off-premises station place, controls described off-premises station and enters the first running status or the second running status and detect service data;
The first running status detected or the service data of the second running status are compared with the Rule of judgment of setting, judges the high pressure valve of described off-premises station and the state of low pressure valve;
Wherein, under the first running status, the blower fan of described off-premises station is forced out of service, and the frequency-changeable compressor of described off-premises station is forced with 35 hertz of operations; Under the second running status, the blower fan of described off-premises station is forced with 20 hertz of operations, and the frequency-changeable compressor of off-premises station is forced with 30 hertz of operations;
First running status of described off-premises station or the second running status can set up the pressure differential of high pressure valve and low pressure valve at different temperatures;
Described service data comprises the working time of the frequency-changeable compressor of described off-premises station, and the high pressure valve of described off-premises station and the pressure differential of low pressure valve.
2. off-premises station valve detection method according to claim 1, is characterized in that:
Described multi-evaporator inverter air conditioner also comprises multiple stage indoor set; Comprise the steps: in described step S100
Control all indoor set enforced opening refrigerating operatons;
The electric expansion valve controlling all indoor sets performs a reset operation, and resetted rear fixing step number 430 ~ 530 step;
The wind shelves controlling all indoor sets are set as high wind shelves;
The electric expansion valve that heats controlling described off-premises station performs a reset operation, and resetted rear fixing step number 430 ~ 530 step;
The subcooler electric expansion valve controlling described off-premises station performs a reset operation, and resetted rear initial step number 0 step;
The four-way valve controlling described off-premises station keeps power down always.
3. off-premises station valve detection method according to claim 1, is characterized in that:
Described multi-evaporator inverter air conditioner also comprises multiple stage indoor set; Comprise the steps: in described step S100
Control all indoor set enforced opening refrigerating operatons;
The electric expansion valve controlling all indoor sets performs a reset operation, and resetted rear fixing step number 480 step;
The wind shelves controlling all indoor sets are set as high wind shelves;
The electric expansion valve that heats controlling described off-premises station performs a reset operation, and resetted rear fixing step number 480 step;
The subcooler electric expansion valve controlling described off-premises station performs a reset operation, and resetted rear initial step number 0 step;
The four-way valve controlling described off-premises station keeps power down always.
4. the off-premises station valve detection method according to Claims 2 or 3, is characterized in that:
Described step S200 comprises the steps:
Step S210: whether judge ambient temperature≤0 DEG C; When ambient temperature≤0 DEG C, enter step S220; Otherwise, enter step S230;
Step S220: described off-premises station enters the first running status: the blower fan of off-premises station is forced out of service, the frequency-changeable compressor of off-premises station is forced with 35 hertz of operations; Detect the service data of described off-premises station in the first running status;
Wherein, described service data comprises the working time of the frequency-changeable compressor of described off-premises station, and the high pressure valve of described off-premises station and the pressure differential of low pressure valve;
Step S221: the service data of the first running status detected is compared with the first Rule of judgment of setting and the second Rule of judgment;
When first reaching the first Rule of judgment the working time of described frequency-changeable compressor, described frequency-changeable compressor is stopped to run; Then judge that high pressure valve and the low pressure valve state of described off-premises station are normal;
When the high pressure valve of described off-premises station and the pressure differential of low pressure valve first reach the second Rule of judgment, described frequency-changeable compressor is stopped to run; Then judge high pressure valve and the low pressure valve abnormal state of described off-premises station, terminate to return;
Wherein, described first Rule of judgment is: accumulative 135 seconds of frequency-changeable compressor continuous operating time; Described second Rule of judgment is: the refrigerant saturation pressure of the multi-evaporator inverter air conditioner that [high pressure valve high pressure P d]-[low pressure valve low pressure Ps] >=15 DEG C is corresponding;
Step S230: described off-premises station enters the second running status: the blower fan of described off-premises station is forced with 20 hertz of operations, the frequency-changeable compressor of off-premises station is forced with 30 hertz of operations; Detect the service data of off-premises station in the second running status;
Wherein, described service data comprises the working time of the frequency-changeable compressor of described multi-evaporator inverter air conditioner, and the high pressure valve of described off-premises station and the pressure differential of low pressure valve;
Step S231: the 3rd Rule of judgment of the service data of the second running status detected and setting and the 4th Rule of judgment are compared;
When first reaching the 3rd Rule of judgment the working time of described frequency-changeable compressor, stop the fan operation of frequency-changeable compressor and off-premises station; Then judge that high pressure valve and the low pressure valve state of described off-premises station are normal;
When the high pressure valve of described off-premises station and the pressure differential of low pressure valve first reach the 4th Rule of judgment, stop the fan operation of frequency-changeable compressor and off-premises station; Then judge high pressure valve and the low pressure valve abnormal state of described off-premises station, terminate to return;
Wherein, described 3rd Rule of judgment is: accumulative 135 seconds of frequency-changeable compressor continuous operating time; Described 4th Rule of judgment is: the refrigerant saturation pressure of the multi-evaporator inverter air conditioner that [high pressure valve high pressure P d]-[low pressure valve low pressure Ps] >=20 DEG C is corresponding.
5. off-premises station valve detection method according to claim 4, is characterized in that:
After described step S200, also comprise the steps:
When the high pressure valve of described off-premises station and low pressure valve state normal time, described multi-evaporator inverter air conditioner reverts to holding state;
When high pressure valve and the low pressure valve abnormal state of described off-premises station, prompting checks whether the high pressure valve of off-premises station and low pressure valve are opened; After unlatching, return operating procedure S100 ~ S200.
6. a multi-evaporator inverter air conditioner, comprises off-premises station and multiple stage indoor set, and the high pressure valve of described off-premises station is connected with described multiple stage indoor set by refrigerant passage respectively with low pressure valve, it is characterized in that:
Also comprising control module, described control module and communicating to connect between described off-premises station and indoor set, running under described multi-evaporator inverter air conditioner enters off-premises station valve detection pattern for controlling; Under off-premises station valve detection pattern, control all indoor set enforced opening refrigerating operatons, described multi-evaporator inverter air conditioner can set up the pressure differential of high pressure valve and low pressure valve in described off-premises station valve detection pattern;
Described control module, also for the ambient temperature according to off-premises station place, controls described off-premises station and enters the first running status or the second running status and detect service data;
Described control module also for the detect first running status or the service data of the second running status being compared with the Rule of judgment of setting, judges the high pressure valve of described off-premises station and the state of low pressure valve;
Wherein, under the first running status, the blower fan of described off-premises station is forced out of service, and the frequency-changeable compressor of described off-premises station is forced with 35 hertz of operations; Under the second running status, the blower fan of described off-premises station is forced with 20 hertz of operations, and the frequency-changeable compressor of off-premises station is forced with 30 hertz of operations;
First running status of described off-premises station or the second running status can set up the pressure differential of high pressure valve and low pressure valve at different temperatures;
Described service data comprises the working time of the frequency-changeable compressor of described off-premises station, and the high pressure valve of described off-premises station and the pressure differential of low pressure valve.
7. want the multi-evaporator inverter air conditioner described in 6 according to right, it is characterized in that:
Described multi-evaporator inverter air conditioner also comprises temperature inductor, timer, the first pressure device and the second pressure device; Described temperature inductor is for detecting the ambient temperature at described off-premises station place and detected ambient temperature being transferred to described control module; Described timer is for measuring the working time of the frequency-changeable compressor of described off-premises station and measured working time being transferred to described control module; Described first pressure device for measure off-premises station high pressure valve pressure and by the high pressure valve pressure transmission of measured off-premises station give described control module; Described second pressure device for measure off-premises station low pressure valve pressure and by the low pressure valve pressure transmission of measured off-premises station give described control module.
8. want the multi-evaporator inverter air conditioner described in 7 according to right, it is characterized in that:
Under multi-evaporator inverter air conditioner enters off-premises station valve detection pattern, controlled by described control module:
All indoor set enforced opening refrigerating operatons;
The electric expansion valve of all indoor sets performs a reset operation, and resetted rear fixing step number 480 step;
The wind shelves of all indoor sets are set as high wind shelves;
The electric expansion valve that heats of described off-premises station performs a reset operation, and resetted rear fixing step number 480 step;
The subcooler electric expansion valve of described off-premises station performs a reset operation, and resetted rear initial step number 0 step;
The four-way valve of described off-premises station keeps power down always.
9. want the multi-evaporator inverter air conditioner described in 8 according to right, it is characterized in that:
Described control module, according to the ambient temperature at off-premises station place, controls described off-premises station and enters the first running status or the second running status and to detect service data as follows:
When ambient temperature≤0 DEG C; Described control module controls described off-premises station and enters the first running status: the blower fan of off-premises station is forced out of service, and the frequency-changeable compressor of off-premises station is forced with 35 hertz of operations; Detect the service data of described off-premises station in the first running status;
As ambient temperature > 0 DEG C; Described control module controls described off-premises station and enters the second running status: the blower fan of described off-premises station is forced with 20 hertz of operations, and the frequency-changeable compressor of off-premises station is forced with 30 hertz of operations; Detect the service data of off-premises station in the second running status;
Wherein, described service data comprises the working time of the frequency-changeable compressor of described multi-evaporator inverter air conditioner, and the high pressure valve of described off-premises station and the pressure differential of low pressure valve.
10. want the multi-evaporator inverter air conditioner described in 9 according to right, it is characterized in that:
The first running status detected or the service data of the second running status compare with the Rule of judgment of setting by described control module, judge that the state of the high pressure valve of described off-premises station and low pressure valve is as follows:
The service data of the first running status detected compares with the first Rule of judgment of setting and the second Rule of judgment by described control module;
When first reaching the first Rule of judgment the working time of described frequency-changeable compressor, described frequency-changeable compressor is stopped to run; Then described control module judge the high pressure valve of described off-premises station and low pressure valve state normal;
When the high pressure valve of described off-premises station and the pressure differential of low pressure valve first reach the second Rule of judgment, described frequency-changeable compressor is stopped to run; Then described control module judges high pressure valve and the low pressure valve abnormal state of described off-premises station, terminates to return;
Wherein, described first Rule of judgment is: accumulative 135 seconds of frequency-changeable compressor continuous operating time; Described second Rule of judgment is: the refrigerant saturation pressure of the multi-evaporator inverter air conditioner that [high pressure valve high pressure P d]-[low pressure valve low pressure Ps] >=15 DEG C is corresponding;
3rd Rule of judgment of the service data of the second running status detected and setting and the 4th Rule of judgment compare by described control module;
When first reaching the 3rd Rule of judgment the working time of described frequency-changeable compressor, stop the fan operation of frequency-changeable compressor and off-premises station; Then described control module judge the high pressure valve of described off-premises station and low pressure valve state normal;
When the high pressure valve of described off-premises station and the pressure differential of low pressure valve first reach the 4th Rule of judgment, stop the fan operation of frequency-changeable compressor and off-premises station; Then described control module judges high pressure valve and the low pressure valve abnormal state of described off-premises station, terminates to return;
Wherein, described 3rd Rule of judgment is: accumulative 135 seconds of frequency-changeable compressor continuous operating time; Described 4th Rule of judgment is: the refrigerant saturation pressure of the multi-evaporator inverter air conditioner that [high pressure valve high pressure P d]-[low pressure valve low pressure Ps] >=20 DEG C is corresponding.
11. multi-evaporator inverter air conditioners according to claim 6, is characterized in that:
Described control module is computing machine or single-chip microcomputer or embedded dsp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210161578.6A CN103424244B (en) | 2012-05-22 | 2012-05-22 | Outdoor unit valve detection method of variable-frequency multi-connected air conditioner and variable-frequency multi-connected air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210161578.6A CN103424244B (en) | 2012-05-22 | 2012-05-22 | Outdoor unit valve detection method of variable-frequency multi-connected air conditioner and variable-frequency multi-connected air conditioner |
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| CN103424244B true CN103424244B (en) | 2016-03-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5442926A (en) * | 1993-03-29 | 1995-08-22 | Sanyo Electric Co., Ltd. | Control system for air-conditioner |
| KR100471723B1 (en) * | 2002-05-17 | 2005-03-08 | 삼성전자주식회사 | Air conditioner and control method thereof |
| KR20060117712A (en) * | 2005-05-13 | 2006-11-17 | 삼성전자주식회사 | Vacuum detection device for air conditioner |
| KR100677282B1 (en) * | 2005-06-17 | 2007-02-02 | 엘지전자 주식회사 | Out door unit control method and control apparatus for air conditioner |
| KR101270540B1 (en) * | 2007-01-27 | 2013-06-03 | 삼성전자주식회사 | Apparatus for inspecting refrigerant pipe connection of multi pipe air conditioner and method thereof |
| CN100489700C (en) * | 2007-03-23 | 2009-05-20 | 沈新荣 | valve control method and valve device for integrating balanced control and throttling |
| JP4798116B2 (en) * | 2007-10-30 | 2011-10-19 | 富士電機株式会社 | Refrigerant flow control device |
| CN101776532B (en) * | 2010-01-26 | 2012-06-27 | 广东美的集团芜湖制冷设备有限公司 | Detection device and detection method used for detecting outdoor unit of air conditioner |
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