CN105222445A - The control method of electric expansion valve, device and air-conditioner set and control method thereof - Google Patents
The control method of electric expansion valve, device and air-conditioner set and control method thereof Download PDFInfo
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- CN105222445A CN105222445A CN201510737705.6A CN201510737705A CN105222445A CN 105222445 A CN105222445 A CN 105222445A CN 201510737705 A CN201510737705 A CN 201510737705A CN 105222445 A CN105222445 A CN 105222445A
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- 238000000034 method Methods 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 90
- 238000001816 cooling Methods 0.000 claims abstract description 38
- 238000012423 maintenance Methods 0.000 claims abstract description 7
- 230000005494 condensation Effects 0.000 claims description 34
- 238000009833 condensation Methods 0.000 claims description 34
- 238000005057 refrigeration Methods 0.000 claims description 30
- 238000007689 inspection Methods 0.000 claims description 26
- 238000010438 heat treatment Methods 0.000 claims description 19
- 238000013461 design Methods 0.000 claims description 12
- 238000012360 testing method Methods 0.000 claims description 12
- 238000010257 thawing Methods 0.000 claims description 10
- 238000004378 air conditioning Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000004043 responsiveness Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention discloses the control method of the electric expansion valve in a kind of wind cooling cold and hot water air-conditioner set, comprising: when electric expansion valve energising starts, the self-check program of unlocking electronic expansion valve also enters holding state after initializing; When electric expansion valve runs, the ambient temperature of Real-time Obtaining electric expansion valve place equipment, and adjust the aperture under electric expansion valve running status in real time according to this ambient temperature; When electric expansion valve is out of service and maintenance is energized, the aperture of electric expansion valve is reset to the aperture under holding state.The invention also discloses a kind of control device of electric expansion valve and a kind of wind cooling cold and hot water air-conditioner set and control method thereof.The present invention is by the initialization action of specific electric expansion valve, ensure that the normal operation of electric expansion valve, and then the problem that the span avoiding aperture adjustment in electric expansion valve operation is excessive, effectively improve stability and the service behaviour of electric expansion valve place equipment.
Description
Technical field
The present invention relates to air-conditioning equipment field, particularly relate to the control method of electric expansion valve, device and air-conditioner set and control method thereof.
Background technology
Electric expansion valve is widely used in field of air conditioning as a kind of novel restricting element.In air-conditioner set system, controller sends sequence of voltage pulses regularly to the coil of electric expansion valve stepper motor, each phase coil of stepper motor is made to carry out according to certain rules being energized and no power, reach the change of each pawl level magnetic of control coil stator regularly, and then control the rotation of rotor, the rotation of rotor drives moving up and down of needle, reaches the object of Flow-rate adjustment.
But in actual use, different responsivenesses is performed to adapt to the operating mode of acute variation under ambient influnence and different working condition residing for air-conditioner set system, and then make the operation of electric expansion valve may produce step-out phenomenon, thus badly influence stability and the throttling control effects of electric expansion valve operation, and then have influence on the stable of air-conditioner set system cloud gray model and usefulness further.
Summary of the invention
Main purpose of the present invention is to provide a kind of control method of electric expansion valve, device and air-conditioner set and control method thereof, is intended to solve during electric expansion valve runs produce step-out and the technical problem that affects stability that electric expansion valve runs and throttling control effects.
For achieving the above object, the invention provides the control method of the electric expansion valve in a kind of wind cooling cold and hot water air-conditioner set, the control method of described electric expansion valve comprises:
When electric expansion valve energising starts, the self-check program of unlocking electronic expansion valve also enters holding state after initializing;
When electric expansion valve runs, the ambient temperature of Real-time Obtaining electric expansion valve place equipment, and adjust the aperture under electric expansion valve running status in real time according to this ambient temperature;
When electric expansion valve is out of service and maintenance is energized, the aperture of electric expansion valve is reset to the aperture under holding state.
Preferably, described when electric expansion valve energising starts, the self-check program of unlocking electronic expansion valve also enters holding state and comprises after initializing:
When electric expansion valve energising starts, reset the aperture of electric expansion valve zero, and run to 100% aperture to carry out self-inspection from 0 aperture;
After the self-inspection of electric expansion valve terminates, the aperture of electric expansion valve is resetted and makes zero and enter holding state, wherein, when entering holding state, the aperture of electric expansion valve being run to first by zero aperture and presets aperture.
Preferably, when air-conditioner set is in refrigeration mode or heating mode, adjust the aperture under electric expansion valve running status in real time according to the ambient temperature of air-conditioner set; When air-conditioner set is in defrosting mode, the aperture of electric expansion valve is adjusted to second and presets aperture.
Further, for achieving the above object, the present invention also provides the control device of the electric expansion valve in a kind of wind cooling cold and hot water air-conditioner set, and the control device of described electric expansion valve comprises:
Aperture initialization module, for when electric expansion valve energising starts, the self-check program of unlocking electronic expansion valve also enters holding state after initializing;
Aperture adjusting module, for when electric expansion valve runs, the ambient temperature of Real-time Obtaining electric expansion valve place equipment, and adjust the aperture under electric expansion valve running status in real time according to this ambient temperature;
Aperture reseting module, for when electric expansion valve is out of service, resets to the aperture under holding state by the aperture of electric expansion valve.
Preferably, described aperture initialization module comprises:
Self-test unit, for when electric expansion valve energising starts, reset the aperture of electric expansion valve zero, and run to 100% aperture to carry out self-inspection from 0 aperture;
Standby aperture setting unit, for after the self-inspection of electric expansion valve terminates, resets the aperture of electric expansion valve and makes zero and enter holding state, wherein, when entering holding state, the aperture of electric expansion valve being run to first by zero aperture and presets aperture.
Preferably, when air-conditioner set is in refrigeration mode or heating mode, adjust the aperture under electric expansion valve running status in real time according to the ambient temperature of air-conditioner set; When air-conditioner set is in defrosting mode, the aperture of electric expansion valve is adjusted to second and presets aperture.
Further, the present invention also provides a kind of wind cooling cold and hot water air-conditioner set, comprise electric expansion valve, water circulating pump, condensation fan, four-way change-over valve, compressor, described wind cooling cold and hot water air-conditioner set comprises the control device of the electric expansion valve described in above-mentioned any one.
Further, the present invention also provides a kind of control method adopting above-mentioned wind cooling cold and hot water air-conditioner set, comprising:
When air-conditioner set is in refrigeration mode, before unlatching compressor, control electric expansion valve by the control device of electric expansion valve enter holding state and shift to an earlier date ON cycle water pump, condensation fan, after air-conditioner set starts refrigeration, open compressor, control electric expansion valve by the control device of electric expansion valve and enter running status and the aperture of corresponding adjustment electric expansion valve; When leaving water temperature is less than or equal to the first design temperature, stop compressor, time-delay closing condensation fan, water circulating pump control electric expansion valve by the control device of electric expansion valve and enter holding state;
When air-conditioner set is in heating mode, before unlatching compressor, control electric expansion valve by the control device of electric expansion valve enter holding state and shift to an earlier date ON cycle water pump, condensation fan, four-way change-over valve, after air-conditioner set startup heats, open compressor, control electric expansion valve by the control device of electric expansion valve and enter running status and the aperture of corresponding adjustment electric expansion valve; When leaving water temperature is more than or equal to the second design temperature, stop compressor, time-delay closing four-way change-over valve, condensation fan, water circulating pump control electric expansion valve by the control device of electric expansion valve and enter holding state.
The present invention, when initializing electric expansion valve, enters holding state after first carrying out self-inspection to electric expansion valve, thus guarantees the normal operation of electric expansion valve; Simultaneously when electric expansion valve runs, environmentally temperature adjusts the aperture under electric expansion valve running status in real time, and then the problem that in avoiding electric expansion valve to run, the span of aperture adjustment is excessive, effectively improve stability and the service behaviour of electric expansion valve place equipment.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of control method one embodiment of electric expansion valve in wind cooling cold and hot water air-conditioner set of the present invention;
Fig. 2 is the refinement schematic flow sheet of step S10 in Fig. 1;
Fig. 3 is the high-level schematic functional block diagram of control device one embodiment of electric expansion valve in wind cooling cold and hot water air-conditioner set of the present invention;
Fig. 4 is the refinement high-level schematic functional block diagram of aperture initialization module in Fig. 3;
Fig. 5 is the high-level schematic functional block diagram of wind cooling cold and hot water air-conditioner set one embodiment of the present invention.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Detailed description of the invention
Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
It is the schematic flow sheet of control method one embodiment of electric expansion valve in wind cooling cold and hot water air-conditioner set of the present invention with reference to Fig. 1, Fig. 1.In the present embodiment, the control method of the electric expansion valve in wind cooling cold and hot water air-conditioner set comprises:
Step S10, when electric expansion valve energising starts, the self-check program of unlocking electronic expansion valve also enters holding state after initializing;
Electric expansion valve is a kind of restricting element of precision, and it is generally moved by stepper motor driven valve core, by aciculiform spool open degree, adjust the size of valve port, thus realizes throttling control.Such as electric expansion valve controls the throttling of refrigerant flow in air-conditioning system, because electric expansion valve is by the setting of automatically controlled programme-control aperture and adjustment, thus electric expansion valve can change the refrigerant flow of air-conditioning system flexibly according to the requirement of air-conditioning system, realize the effective control to the degree of superheat, thus realize the raising of the usefulness of air-conditioning system, thus it has critical role in the usefulness hierarchy of control of air-conditioning system.But in actual use, ambient influnence residing for air-conditioning system, and perform different responsivenesses under different working condition to adapt to the operating mode of acute variation, and then make the operation of electric expansion valve may produce step-out phenomenon, thus badly influence the throttling control effects of electric expansion valve, and then have influence on the stable of air-conditioning system operation and usefulness further.
Therefore, in the present embodiment, when electric expansion valve energising starts, first the self-check program of unlocking electronic expansion valve is to detect the indices parameter of electric expansion valve, simultaneously, also initialization operation is carried out to electric expansion valve, to guarantee that the aperture of electric expansion valve is normally run and avoided the initial opening of electric expansion valve excessive and affect the stability that electric expansion valve place equipment runs, finally enter holding state again.
Step S20, when electric expansion valve runs, the ambient temperature of Real-time Obtaining electric expansion valve place equipment, and adjust the aperture under electric expansion valve running status in real time according to this ambient temperature;
The temperature value that the general basis of existing electric expansion valve collects or temperature change value etc., the aperture of adjustment electric expansion valve, realizes the adjustment to valve port size, thus realizes throttling control.Such as according to indoor or outdoors temperature or the temperature etc. according to heat exchanger, determine the aperture size of Current electronic expansion valve, although comprehensively determine the control accuracy that can improve electronic expansion valve opening according to multiple variable parameter, but according to variable parameter too much, then the regulating frequency of electronic expansion valve opening also can be higher, and then also can reduce the aperture control accuracy of electric expansion valve to a certain extent, then affect stability and the usefulness of the equipment operation of electric expansion valve place.
Therefore, in the present embodiment, when electric expansion valve runs, by the ambient temperature of Real-time Obtaining electric expansion valve place equipment, and adjust the aperture under electric expansion valve running status in real time according to this ambient temperature, be also the aperture only need can determining electric expansion valve in operation in the present embodiment according to an ambient temperature.It should be noted that, in the present embodiment, specifically according to the test statistics data of aperture and the Operating ettectiveness of electric expansion valve place equipment of ambient temperature and electric expansion valve, determine the aperture of electric expansion valve in running.
The control method of electric expansion valve of the present invention is applied to wind cooling cold and hot water air-conditioner set, now, when air-conditioner set is in refrigeration mode or heating mode, adjusts the aperture under electric expansion valve running status according to the ambient temperature of air-conditioner set in real time; And when air-conditioner set is in defrosting mode, the aperture of electric expansion valve is adjusted to second and presets aperture.
In the present embodiment, if the open range of the electric expansion valve that air-conditioner set adopts is 0 ~ 500 step, then arrange as follows for the electronic expansion valve opening (K1) that can play to greatest extent under different ambient temperature (T10) corresponding to air-conditioner set usefulness:
(1) refrigeration mode
1) environment temperature T10 > 40 DEG C, electronic expansion valve opening K1=275 walk;
2) environment temperature 25 DEG C≤T10≤40 DEG C, electronic expansion valve opening K1=200 walks;
3) environment temperature T10 < 25 DEG C, electronic expansion valve opening K1=150 walk.
(2) heating mode
1) environment temperature T10 > 15 DEG C, electronic expansion valve opening K1=225 walk;
2) environment temperature 5 DEG C≤T10≤15 DEG C, electronic expansion valve opening K1=175 walks;
3) environment temperature T10 < 5 DEG C, electronic expansion valve opening K1=125 walk.
(3) defrosting mode
When air-conditioner set is in defrosting mode, the aperture of electric expansion valve is adjusted to second and presets aperture 150 step.
In addition, what needs further illustrated is, the desirable aperture of above-mentioned electric expansion valve be freeze according to standard GB/T/T18430.1-2007 wind cooling cold and hot water air-conditioner set, heat, the measurement condition that defrosts checking is determined, now, under the desirable aperture of the electric expansion valve corresponding to varying environment temperature, wind cooling cold and hot water air-conditioner set can give play to optimum usefulness.
Step S30, when electric expansion valve is out of service and maintenance is energized, resets to the aperture under holding state by the aperture of electric expansion valve.
In the present embodiment, when electric expansion valve is out of service and maintenance is energized, also can guarantee when running for making electric expansion valve next time that electric expansion valve normally runs and avoids the initial opening of electric expansion valve excessive and affect the stability that electric expansion valve place equipment runs, therefore, the aperture of electric expansion valve is reset to the aperture under holding state, also namely keeps the aperture of the electric expansion valve under holding state to be each time all the desirable aperture of optimum preset.
In the present embodiment, when initializing electric expansion valve, after first self-inspection being carried out to electric expansion valve, enter holding state, thus guarantee the normal operation of electric expansion valve; Simultaneously when electric expansion valve runs, environmentally temperature adjusts the aperture under electric expansion valve running status in real time, and then the problem that span is excessive, aperture regulating frequency is too high of aperture adjustment in avoiding electric expansion valve to run, effectively improve stability and the service behaviour of electric expansion valve place equipment.
With reference to the refinement schematic flow sheet that Fig. 2, Fig. 2 are step S10 in Fig. 1.Based on above-described embodiment, in the present embodiment, above-mentioned steps S10 comprises:
Step S101, when electric expansion valve energising starts, reset the aperture of electric expansion valve zero, and run to 100% aperture to carry out self-inspection from 0 aperture;
In the present embodiment, due to a unknown step number may be in when electric expansion valve energising starts, therefore, for complete realization is to the self-inspection of electric expansion valve parameters, therefore, need the aperture of electric expansion valve to be carried out reset zero, and realize the self-inspection running to 100% aperture from 0 aperture.
Step S102, after the self-inspection of electric expansion valve terminates, resets the aperture of electric expansion valve and makes zero and enter holding state, wherein, when entering holding state, the aperture of electric expansion valve being run to first by zero aperture and presets aperture.
In addition, in the present embodiment, after the self-inspection of electric expansion valve terminates, needing to enter holding state again by after the aperture of electric expansion valve reset zero, meanwhile, when entering holding state, for guaranteeing that electric expansion valve normally runs and avoids the initial opening of electric expansion valve excessive and affect the stability that electric expansion valve place equipment runs, therefore, need that the aperture of electric expansion valve is run to first by zero aperture and preset aperture.In the present embodiment, specifically according to the Operating ettectiveness of test statistics data and electric expansion valve place equipment, determine the aperture of electric expansion valve under holding state.
According to standard GB/T/T18430.1-2007 wind cooling cold and hot water air-conditioner set refrigeration, heat measurement condition checking, if the open range of electric expansion valve is 0 ~ 500 step, dry-bulb temperature is 21 DEG C, wet-bulb temperature is 15.5 DEG C, when leaving water temperature is 50 DEG C, now, under holding state, the desirable aperture of electric expansion valve is 300 steps.
In the present embodiment, for the excessive problem of span of the normal operation and aperture adjustment in avoiding electric expansion valve to run of guaranteeing electric expansion valve, when electric expansion valve energising starts, reset the aperture of electric expansion valve zero, and run to 100% aperture to carry out self-inspection from 0 aperture; Simultaneously, after self-inspection terminates, the aperture of electric expansion valve is also run to the first default aperture, such as 300 steps by zero aperture by the zero that the aperture of electric expansion valve resetted, thus initialization process is carried out to electric expansion valve, make electric expansion valve keep best aperture in the standby state.
It is the high-level schematic functional block diagram of control device one embodiment of electric expansion valve in wind cooling cold and hot water air-conditioner set of the present invention with reference to Fig. 3, Fig. 3.In the present embodiment, the control device of the electric expansion valve in wind cooling cold and hot water air-conditioner set comprises:
Aperture initialization module 10, for when electric expansion valve energising starts, the self-check program of unlocking electronic expansion valve also enters holding state after initializing;
In the present embodiment, when electric expansion valve energising starts, the self-check program of aperture initialization module 10 unlocking electronic expansion valve is to detect the indices parameter of electric expansion valve, simultaneously, aperture initialization module 10 also carries out initialization operation to electric expansion valve, to guarantee that electric expansion valve normally runs and avoids the initial opening of electric expansion valve excessive and affect the stability that electric expansion valve place equipment runs, finally enter holding state again.
Aperture adjusting module 20, for when electric expansion valve runs, the ambient temperature of Real-time Obtaining electric expansion valve place equipment, and adjust the aperture under electric expansion valve running status in real time according to this ambient temperature;
The temperature value that the general basis of existing electric expansion valve collects or temperature change value etc., the aperture of adjustment electric expansion valve, realizes the adjustment to valve port size, thus realizes throttling control.Such as according to indoor or outdoors temperature or the temperature etc. according to heat exchanger, determine the aperture size of Current electronic expansion valve, although comprehensively determine the control accuracy that can improve electronic expansion valve opening according to multiple variable parameter, but according to variable parameter too much, then the regulating frequency of electronic expansion valve opening also can be higher, and then also can reduce the aperture control accuracy of electric expansion valve to a certain extent, then affect stability and the usefulness of the equipment operation of electric expansion valve place.
Therefore, in the present embodiment, when electric expansion valve runs, aperture adjusting module 20 is by the ambient temperature of Real-time Obtaining electric expansion valve place equipment, and adjust the aperture under electric expansion valve running status in real time according to this ambient temperature, be also the aperture only need can determining electric expansion valve in operation in the present embodiment according to an ambient temperature.It should be noted that, in the present embodiment, aperture adjusting module 20, specifically according to the test statistics data of aperture and the Operating ettectiveness of electric expansion valve place equipment of ambient temperature and electric expansion valve, determines the aperture of electric expansion valve in running.
The control device of electric expansion valve of the present invention is applied to wind cooling cold and hot water air-conditioner set, now, when air-conditioner set is in refrigeration mode or heating mode, aperture adjusting module 20 adjusts the aperture under electric expansion valve running status in real time according to the ambient temperature of air-conditioner set; And when air-conditioner set is in defrosting mode, the aperture of electric expansion valve is adjusted to second and presets aperture by aperture adjusting module 20.
In the present embodiment, if the open range of the electric expansion valve that air-conditioner set adopts is 0 ~ 500 step, then arrange as follows for the electronic expansion valve opening (K1) that can play to greatest extent under different ambient temperature (T10) corresponding to air-conditioner set usefulness:
(1) refrigeration mode
1) environment temperature T10 > 40 DEG C, electronic expansion valve opening K1=275 walk;
2) environment temperature 25 DEG C≤T10≤40 DEG C, electronic expansion valve opening K1=200 walks;
3) environment temperature T10 < 25 DEG C, electronic expansion valve opening K1=150 walk.
(2) heating mode
1) environment temperature T10 > 15 DEG C, electronic expansion valve opening K1=225 walk;
2) environment temperature 5 DEG C≤T10≤15 DEG C, electronic expansion valve opening K1=175 walks;
3) environment temperature T10 < 5 DEG C, electronic expansion valve opening K1=125 walk.
(3) defrosting mode
When air-conditioner set is in defrosting mode, the aperture of electric expansion valve is adjusted to second and presets aperture 150 step.
In addition, what needs further illustrated is, the desirable aperture of above-mentioned electric expansion valve be freeze according to standard GB/T/T18430.1-2007 wind cooling cold and hot water air-conditioner set, heat, the measurement condition that defrosts checking is determined, now, under the desirable aperture of the electric expansion valve corresponding to varying environment temperature, wind cooling cold and hot water air-conditioner set can give play to optimum usefulness.
Aperture reseting module 30, for when electric expansion valve is out of service, resets to the aperture under holding state by the aperture of electric expansion valve.
In the present embodiment, when electric expansion valve is out of service and maintenance is energized, also can guarantee when running for making electric expansion valve next time that electric expansion valve normally runs and avoids the initial opening of electric expansion valve excessive and affect the stability that electric expansion valve place equipment runs, therefore, the aperture of electric expansion valve is reset to the aperture under holding state by aperture reseting module 30, also namely keeps the aperture of the electric expansion valve under holding state to be each time all the desirable aperture of optimum preset.
In the present embodiment, when initializing electric expansion valve, entering holding state after first carrying out self-inspection by aperture initialization module 10 pairs of electric expansion valves, thus guaranteeing the normal operation of electric expansion valve; Simultaneously when electric expansion valve runs, the aperture under electric expansion valve running status is adjusted in real time with environmentally temperature by aperture adjusting module 20, and then the problem that in avoiding electric expansion valve to run, the span of aperture adjustment is excessive, effectively improve stability and the service behaviour of electric expansion valve place equipment.
With reference to the refinement high-level schematic functional block diagram that Fig. 4, Fig. 4 are aperture initialization module in Fig. 3.In the present embodiment, described aperture initialization module 10 comprises:
Self-test unit 101, for when electric expansion valve energising starts, reset the aperture of electric expansion valve zero, and run to 100% aperture to carry out self-inspection from 0 aperture;
In the present embodiment, due to a unknown step number may be in when electric expansion valve energising starts, therefore, for complete realization is to the self-inspection of electric expansion valve parameters, therefore, by self-test unit 101, the aperture of electric expansion valve is carried out reset zero, and realize the self-inspection running to 100% aperture from 0 aperture.
Standby aperture setting unit 102, for after the self-inspection of electric expansion valve terminates, resets the aperture of electric expansion valve and makes zero and enter holding state, wherein, when entering holding state, the aperture of electric expansion valve being run to first by zero aperture and presets aperture.
In the present embodiment, after the self-inspection of electric expansion valve terminates, holding state is entered again by after the aperture of electric expansion valve reset zero by standby aperture setting unit 102, simultaneously, when entering holding state, for guaranteeing that electric expansion valve normally runs and avoids the initial opening of electric expansion valve excessive and affect the stability that electric expansion valve place equipment runs, therefore, need the aperture of electric expansion valve to run to default aperture by zero aperture.In the present embodiment, specifically according to the Operating ettectiveness of test statistics data and electric expansion valve place equipment, determine the aperture of electric expansion valve under holding state.
According to standard GB/T/T18430.1-2007 wind cooling cold and hot water air-conditioner set refrigeration, heat measurement condition checking, if the open range of electric expansion valve is 0 ~ 500 step, dry-bulb temperature is 21 DEG C, wet-bulb temperature is 15.5 DEG C, when leaving water temperature is 50 DEG C, now, under holding state, the desirable aperture of electric expansion valve is 300 steps.
In the present embodiment, for the excessive problem of span of the normal operation and aperture adjustment in avoiding electric expansion valve to run of guaranteeing electric expansion valve, when electric expansion valve energising starts, reset the aperture of electric expansion valve zero, and run to 100% aperture to carry out self-inspection from 0 aperture; Simultaneously, after self-inspection terminates, the aperture of electric expansion valve is also run to the first default aperture, such as 300 steps by zero aperture by the zero that the aperture of electric expansion valve resetted, thus initialization process is carried out to electric expansion valve, make electric expansion valve keep best aperture in the standby state.
With reference to the high-level schematic functional block diagram that Fig. 5, Fig. 5 are wind cooling cold and hot water air-conditioner set one embodiment of the present invention.In the present embodiment, wind cooling cold and hot water air-conditioner set comprises control device 210 and electric expansion valve 220, compressor 110, water circulating pump 120, condensation fan 130, the four-way change-over valve 140 of electric expansion valve.
In the present embodiment, wind cooling cold and hot water air-conditioner set at least also includes electric expansion valve and ambient temperature sensor.Air-conditioner set (i.e. wind cooling cold and hot water air-conditioner set or abbreviation unit) realizes controlling the aperture of electric expansion valve by the control device 210 of electric expansion valve, specifically comprises self-inspection when starting electric expansion valve energising and the Initialize installation under holding state; And by ambient temperature sensor, the ambient temperature of Real-time Obtaining electric expansion valve place equipment, and adjust the aperture under electric expansion valve running status in real time according to this ambient temperature; In addition, when electric expansion valve is out of service and maintenance is energized, the aperture of electric expansion valve to be reset to the aperture under holding state by air-conditioner set by the control device 210 of electric expansion valve, thus make electric expansion valve remain best aperture in the standby state, and then guarantee the normal operation of electric expansion valve and avoid the span of aperture adjustment in electric expansion valve operation excessive, finally make the operation of air-conditioner set system more reasonable, stable and realizes maximal efficiency.
Based on above-described embodiment, in wind cooling cold and hot water air-conditioner set control method one embodiment of the present invention, wind cooling cold and hot water air-conditioner set control method comprises:
When air-conditioner set is in refrigeration mode, before unlatching compressor, control electric expansion valve by the control device of electric expansion valve enter holding state and shift to an earlier date ON cycle water pump, condensation fan, after air-conditioner set starts refrigeration, open compressor, control electric expansion valve by the control device of electric expansion valve and enter running status and the aperture of corresponding adjustment electric expansion valve; When leaving water temperature is less than or equal to the first design temperature, stop compressor, time-delay closing condensation fan, water circulating pump control electric expansion valve by the control device of electric expansion valve and enter holding state;
When air-conditioner set is in heating mode, before unlatching compressor, control electric expansion valve by the control device of electric expansion valve enter holding state and shift to an earlier date ON cycle water pump, condensation fan, four-way change-over valve, after air-conditioner set startup heats, open compressor, control electric expansion valve by the control device of electric expansion valve and enter running status and the aperture of corresponding adjustment electric expansion valve; When leaving water temperature is more than or equal to the second design temperature, stop compressor, time-delay closing four-way change-over valve, condensation fan, water circulating pump control electric expansion valve by the control device of electric expansion valve and enter holding state.
Even running state can be entered sooner for making compressor, thus make the operation of air-conditioner set more reliable and stable, in the present embodiment, when air-conditioner set is in refrigeration mode, before unlatching compressor 110, control electric expansion valve 220 by the control device 210 of electric expansion valve enter holding state and shift to an earlier date ON cycle water pump 120, condensation fan 130, and after compressor 110 is out of service, time-delay closing condensation fan 130, water circulating pump 120 control electric expansion valve 220 by the control device 210 of electric expansion valve and enter holding state;
And when air-conditioner set is in heating mode, before unlatching compressor 110, control electric expansion valve 220 by the control device 210 of electric expansion valve enter holding state and shift to an earlier date ON cycle water pump 120, condensation fan 130, four-way change-over valve 140, after compressor 110 is out of service, time-delay closing four-way change-over valve 140, condensation fan 130, water circulating pump 120 control electric expansion valve 220 by the control device 210 of electric expansion valve and enter holding state.
In the present embodiment, according to standard GB/T/T18430.1-2007 wind cooling cold and hot water air-conditioner set refrigeration, heat measurement condition checking, adopt following control logic that compressor can be made can to enter even running state sooner, thus make the operation of air-conditioner set more reliable and stable:
(1), kind of refrigeration cycle control logic: unit power on holding state → water circulating pump 120 open 30 seconds → condensation fan 130 in advance and open 10 seconds → unit starting refrigeration control system → compressor 110 in advance and open → electric expansion valve 220 enters running status → when leaving water temperature equals 10 DEG C, stop compressor 110 → condensation fan 130 time delay 10 seconds closedown → water circulating pumps 120 time delay 30 seconds closedown → unit holding states, when triggering is entered refrigeration mode higher than when 10 DEG C by leaving water temperature again;
Above-mentioned kind of refrigeration cycle control logic is only the optimum control logic that the present embodiment draws when testing.When unit is in refrigeration mode, when unit powers on and is in standby, now the control device 210 of electric expansion valve controls electric expansion valve 220 and enters holding state, even if also electric expansion valve 220 keeps optimal standby aperture; If when detecting that current leaving water temperature needs higher than design temperature to freeze, then before compressor 110 is opened, ON cycle water pump 120, condensation fan 130 in advance, and then avoid causing compressor 110 can not enter the generation of the situations such as even running state fast as situations such as flow instabilities, thus ensure the operation more reasonably stability of whole wind cooling cold and hot water air-conditioner set, and then the refrigeration of maximum performance place unit.In addition, the in advance opening time of above-mentioned water circulating pump 120, condensation fan 130 specifically with compressor 110 opening time for basis of reference.
After air-conditioner set starts refrigeration, open compressor again, control electric expansion valve 220 by the control device 210 of electric expansion valve and enter running status and according to the aperture of the corresponding adjustment electric expansion valve 220 of the ambient temperature of current air-conditioner set; When leaving water temperature is less than or equal to design temperature; stop compressor 110, time-delay closing condensation fan 130, water circulating pump 120, and then after avoiding compressor 110 to shut down suddenly; high pressure gas liquid cannot normally be discharged and have an impact to unit, such as high pressure gas liquid refluence etc.Control electric expansion valve 220 by the control device 210 of electric expansion valve simultaneously and again enter holding state, only when leaving water temperature enters refrigeration mode higher than will again trigger during design temperature.In addition, the time delay of above-mentioned water circulating pump 120, condensation fan 130 specifically with compressor 110 downtime for basis of reference.
It should be noted that, in the present invention, water circulating pump 120 and condensation fan 130 opening time therebetween and order, shut-in time and order do not limit. and the above-mentioned kind of refrigeration cycle control logic only just optimum control logic that draws when testing of the present embodiment, makes air-conditioner set of the present invention run more reliable and stable.In addition, in above-mentioned kind of refrigeration cycle control logic, for ensureing electric expansion valve 210 normal operation and having given play to the maximum refrigeration of air-conditioner set, therefore, preferably after each compressor 110 is opened, all need the aperture of the ambient temperature adjustment electric expansion valve according to current air-conditioner set.
(2), heat cycle control logic: unit power on holding state → water circulating pump 120 open in advance 30 seconds → condensation fan 130 open in advance 10 seconds → four-way change-over valve 140 be energized latter 10 seconds unlatching → unit startings heat control system → electric expansion valve 220 and enter running status → compressor 110 and open → when leaving water temperature equals 50 DEG C, 10 seconds closedown → condensation fans 130 time delay, 10 seconds closedown → water circulating pumps 120 time delay, 30 seconds closedown → unit holding states after the power-off of stopping compressor 110 → four-way change-over valve 140, when leaving water temperature will enter heating mode again lower than when 50 DEG C.
The above-mentioned cycle control logic that heats is only the optimum control logic that the present embodiment draws when testing.When unit is in heating mode, when unit powers on and is in standby, now the control device 210 of electric expansion valve controls electric expansion valve 220 and enters holding state, even if also electric expansion valve 220 keeps optimal standby aperture; If when detecting that current leaving water temperature needs lower than design temperature to heat, then before compressor 110 is opened, ON cycle water pump 120, condensation fan 130, four-way change-over valve 140 in advance, and then avoid causing compressor can not enter the generation of the situations such as even running state fast as situations such as flow instabilities, thus ensure the operation more reasonably stability of whole wind cooling cold and hot water air-conditioner set, and then the heating effect of maximum performance place unit.In addition, the conduction time in advance of in advance opening time of above-mentioned water circulating pump 120, condensation fan 130 and four-way change-over valve 140 specifically with compressor 110 opening time for basis of reference.
Air-conditioner set start heat after open compressor again, control electric expansion valve 220 by the control device 210 of electric expansion valve and enter running status and according to the aperture of the corresponding adjustment electric expansion valve 210 of the ambient temperature of current air-conditioner set; When leaving water temperature is more than or equal to design temperature; stop compressor 110; time-delay closing four-way change-over valve 140, condensation fan 130, water circulating pump 120; and then after avoiding compressor 110 to shut down suddenly; HTHP gas-liquid cannot normally be discharged and have an impact to unit, such as HTHP gas-liquid refluence etc.Control electric expansion valve 220 by the control device 210 of electric expansion valve simultaneously and again enter holding state, only when leaving water temperature enters heating mode lower than will again trigger during design temperature.In addition, the delay power-off time of time delay of above-mentioned water circulating pump 120, condensation fan 130 and four-way change-over valve 140 specifically with the compressor shutdown time for basis of reference.
It should be noted that, the opening time (or conduction time) in the present invention between water circulating pump 120, condensation fan 130, four-way change-over valve 140 three and order, shut-in time (or power-off time) and order do not limit.Above-mentionedly heating the cycle control logic only just optimum control logic that draws when testing of the present embodiment, air-conditioner set of the present invention being run more reliable and stable.In addition, above-mentionedly heat in cycle control logic, for ensureing electric expansion valve 210 normal operation and having given play to the maximum heating effect of air-conditioner set, therefore, preferably after each compressor is opened, all need the aperture of the ambient temperature adjustment electric expansion valve 210 according to current air-conditioner set.
In the present embodiment, when unit is in holding state, electric expansion valve 220 is in holding state equally.By shifting to an earlier date ON cycle water pump 120, condensation fan 130, four-way change-over valve 140, and then namely wind cooling cold and hot water air-conditioner set can be in operation before compressor 110 runs, thus make compressor 110 can enter even running state sooner, thus make air-conditioner set entire system run more rationally, stablize, meanwhile, refrigerating capacity and the heating capacity of air-conditioner set can also greatly be improved.
In addition, the present embodiment passes through verification experimental verification, after compressor 110 is started shooting or start shooting stable after restart electric expansion valve 220, can guarantee that the operation of electric expansion valve 220 is more stable, control also more accurate, simultaneously, after compressor 110 is out of service or after a period of time out of service, control electric expansion valve 220 by the control device 210 of electric expansion valve again and enter holding state, thus guarantee that electric expansion valve 220 can run in upper refrigeration once or the desirable aperture heated with the best in circulation.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (8)
1. a control method for the electric expansion valve in wind cooling cold and hot water air-conditioner set, is characterized in that, the control method of described electric expansion valve comprises:
When electric expansion valve energising starts, the self-check program of unlocking electronic expansion valve also enters holding state after initializing;
When electric expansion valve runs, the ambient temperature of Real-time Obtaining electric expansion valve place equipment, and adjust the aperture under electric expansion valve running status in real time according to this ambient temperature;
When electric expansion valve is out of service and maintenance is energized, the aperture of electric expansion valve is reset to the aperture under holding state.
2. the control method of electric expansion valve as claimed in claim 1, is characterized in that, described when electric expansion valve energising startup, and the self-check program of unlocking electronic expansion valve also enters holding state and comprises after initializing:
When electric expansion valve energising starts, reset the aperture of electric expansion valve zero, and run to 100% aperture to carry out self-inspection from 0 aperture;
After the self-inspection of electric expansion valve terminates, the aperture of electric expansion valve is resetted and makes zero and enter holding state, wherein, when entering holding state, the aperture of electric expansion valve being run to first by zero aperture and presets aperture.
3. the control method of electric expansion valve as claimed in claim 1 or 2, is characterized in that, when air-conditioner set is in refrigeration mode or heating mode, adjust the aperture under electric expansion valve running status according to the ambient temperature of air-conditioner set in real time; When air-conditioner set is in defrosting mode, the aperture of electric expansion valve is adjusted to second and presets aperture.
4. a control device for the electric expansion valve in wind cooling cold and hot water air-conditioner set, is characterized in that, the control device of described electric expansion valve comprises:
Aperture initialization module, for when electric expansion valve energising starts, the self-check program of unlocking electronic expansion valve also enters holding state after initializing;
Aperture adjusting module, for when electric expansion valve runs, the ambient temperature of Real-time Obtaining electric expansion valve place equipment, and adjust the aperture under electric expansion valve running status in real time according to this ambient temperature;
Aperture reseting module, for when electric expansion valve is out of service, resets to the aperture under holding state by the aperture of electric expansion valve.
5. the control device of electric expansion valve as claimed in claim 4, it is characterized in that, described aperture initialization module comprises:
Self-test unit, for when electric expansion valve energising starts, reset the aperture of electric expansion valve zero, and run to 100% aperture to carry out self-inspection from 0 aperture;
Standby aperture setting unit, for after the self-inspection of electric expansion valve terminates, resets the aperture of electric expansion valve and makes zero and enter holding state, wherein, when entering holding state, the aperture of electric expansion valve being run to first by zero aperture and presets aperture.
6. the control device of the electric expansion valve as described in claim 4 or 5, is characterized in that, when air-conditioner set is in refrigeration mode or heating mode, adjusts the aperture under electric expansion valve running status according to the ambient temperature of air-conditioner set in real time; When air-conditioner set is in defrosting mode, the aperture of electric expansion valve is adjusted to second and presets aperture.
7. a wind cooling cold and hot water air-conditioner set, comprise electric expansion valve, water circulating pump, condensation fan, four-way change-over valve, compressor, it is characterized in that, described wind cooling cold and hot water air-conditioner set also comprises the control device of the electric expansion valve according to any one of claim 4-6.
8. adopt a control method for wind cooling cold and hot water air-conditioner set according to claim 7, it is characterized in that, the control method of described wind cooling cold and hot water air-conditioner set comprises:
When air-conditioner set is in refrigeration mode, before unlatching compressor, control electric expansion valve by the control device of electric expansion valve enter holding state and shift to an earlier date ON cycle water pump, condensation fan, after air-conditioner set starts refrigeration, open compressor, control electric expansion valve by the control device of electric expansion valve and enter running status and the aperture of corresponding adjustment electric expansion valve; When leaving water temperature is less than or equal to the first design temperature, stop compressor, time-delay closing condensation fan, water circulating pump control electric expansion valve by the control device of electric expansion valve and enter holding state;
When air-conditioner set is in heating mode, before unlatching compressor, control electric expansion valve by the control device of electric expansion valve enter holding state and shift to an earlier date ON cycle water pump, condensation fan, four-way change-over valve, after air-conditioner set startup heats, open compressor, control electric expansion valve by the control device of electric expansion valve and enter running status and the aperture of corresponding adjustment electric expansion valve; When leaving water temperature is more than or equal to the second design temperature, stop compressor, time-delay closing four-way change-over valve, condensation fan, water circulating pump control electric expansion valve by the control device of electric expansion valve and enter holding state.
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