CN103196202A - Air conditioner and control method thereof - Google Patents
Air conditioner and control method thereof Download PDFInfo
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- CN103196202A CN103196202A CN2012100053866A CN201210005386A CN103196202A CN 103196202 A CN103196202 A CN 103196202A CN 2012100053866 A CN2012100053866 A CN 2012100053866A CN 201210005386 A CN201210005386 A CN 201210005386A CN 103196202 A CN103196202 A CN 103196202A
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- 230000001105 regulatory effect Effects 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 12
- 239000003507 refrigerant Substances 0.000 claims description 12
- 230000001276 controlling effect Effects 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000005057 refrigeration Methods 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 11
- 230000007613 environmental effect Effects 0.000 abstract 1
- 230000007774 longterm Effects 0.000 abstract 1
- 238000004378 air conditioning Methods 0.000 description 10
- 230000008020 evaporation Effects 0.000 description 6
- 238000001704 evaporation Methods 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 238000009833 condensation Methods 0.000 description 4
- 239000002826 coolant Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
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- 230000008901 benefit Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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Abstract
The invention discloses an air conditioner and a control method thereof. The control method of the air conditioner comprises the following steps: detecting the exhaust temperature of a compressor of the air conditioner; detecting the temperature of a heat exchanger pipeline of the air conditioner; calculating the difference value between the exhaust temperature of the compressor and the temperature of the heat exchanger pipeline to obtain the exhaust superheat degree of the air conditioner; comparing the relationship between the exhaust superheat degree and a target exhaust superheat degree range; and when the exhaust superheat degree is not in the target exhaust superheat degree range, adjusting the opening degree of an electronic expansion valve of the air conditioner to adjust the exhaust superheat degree to be in the target exhaust superheat degree range. According to the invention, the electronic expansion valve of the system is adjusted by adopting the exhaust superheat degree, and the upper and lower limits of the exhaust superheat degree are set in the adjusting process, so that the air conditioner can keep stable exhaust superheat degree no matter what environmental temperature the air conditioner is at, and the long-term operation stability and reliability of the air conditioner are greatly enhanced.
Description
Technical field
The present invention relates to field of air conditioning, in particular to a kind of air-conditioner and control method thereof.
Background technology
Frequency-conversion air-conditioning system is because it is stable, and the advantage of economical and energy saving is more and more favored by the people.The transducer air conditioning unit generally all is to carry out throttling by electric expansion valve to regulate, and electric expansion valve is important restricting element in the frequency-conversion air-conditioning system, and the quality of its adjusting directly influences the stability of air-conditioning system operation.
At present the regulative mode of electric expansion valve mainly contains according to the control of the evaporation degree of superheat, according to delivery temperature control etc. in the frequency-conversion air-conditioning system.Modal in the air-conditioner product is according to the control of the evaporation degree of superheat.The method is to arrange the temperature-sensitive bag at indoor heat exchanger refrigerant turnover pipe, comes the evaporation degree of superheat of control system and then the aperture of regulating electric expansion valve by the temperature that detects refrigerant turnover indoor heat exchanger.
And the evaporation degree of superheat can not reflect the suction superheat of system well, can not make that the aperture of electric expansion valve is suitable, still can have the too high or too low problem of suction superheat.In the air-conditioning system running, if electronic expansion valve opening is excessive, throttling action is not obvious, then can reduce the refrigerating capacity of air-conditioning system greatly, also might cause the generation of " liquid hammer " phenomenon simultaneously, even damages compressor.Otherwise if electronic expansion valve opening is too small, throttling action is excessive, then can increase the power consumption of system again, increases user's power consumption indirectly, does not reach the purpose of economical and energy saving.
Because the electric expansion valve regulating effect is bad, and cause the problem of operation stability and poor reliability at frequency-conversion air-conditioning system in the correlation technique, do not propose effective solution at present as yet.
Summary of the invention
Main purpose of the present invention is to provide a kind of air-conditioner and control method thereof, to solve the too high or too low problem of air-conditioner suction superheat.
To achieve these goals, according to an aspect of the present invention, provide a kind of control method of air-conditioner.
Control method according to air-conditioner of the present invention comprises: the compressor exhaust temperature that detects air-conditioner; Detect the Tube Sheet of Heat Exchanger channel temp of air-conditioner; Calculate the difference of compressor exhaust temperature and Tube Sheet of Heat Exchanger channel temp, to obtain the exhaust degree of superheat of air-conditioner; The relation that compares the exhaust degree of superheat and target exhaust degree of superheat scope; And when the exhaust degree of superheat was not in target exhaust degree of superheat scope, the aperture of the electric expansion valve of adjusting air-conditioner was to regulate the exhaust degree of superheat in target exhaust degree of superheat scope.
Further, when the exhaust degree of superheat is not in target exhaust degree of superheat scope, the aperture of regulating the electric expansion valve of air-conditioner comprises: when the exhaust degree of superheat during greater than the maximum in the target exhaust degree of superheat scope, the aperture of the electric expansion valve of control air-conditioner increases; And when the exhaust degree of superheat during less than the minimum of a value in the target exhaust degree of superheat scope, the aperture of the electric expansion valve of control air-conditioner reduces.
Further, the aperture increase of the electric expansion valve of control air-conditioner comprises: the aperture of control electric expansion valve increases with the speed of 5B/20s; And the aperture of the electric expansion valve of control air-conditioner reduces to comprise: the aperture of control electric expansion valve reduces with the speed of 5B/20s.
Further, the Tube Sheet of Heat Exchanger channel temp that detects air-conditioner comprises: detect Tube Sheet of Heat Exchanger channel temp degree by the temperature-sensitive bag, wherein, the temperature-sensitive bag is arranged at refrigerant in the heat exchanger tube and is in pipeline section under the saturation state.
Further, before the Tube Sheet of Heat Exchanger channel temp that detects air-conditioner, this method also comprises: detect the operational mode of air-conditioner, the Tube Sheet of Heat Exchanger channel temp that detects air-conditioner comprises: when the operational mode of air-conditioner is refrigeration mode, detect the outdoor heat exchanger pipe temperature of air-conditioner; And when the operational mode of air-conditioner is heating mode, detect the indoor heat exchanger pipe temperature of air-conditioner.
To achieve these goals, according to a further aspect in the invention, provide a kind of air-conditioner.
Air-conditioner according to the present invention comprises: electric expansion valve; Compressor; Heat exchanger; First temperature sensing device is positioned at the exhaust outlet of compressor, for detection of compressor exhaust temperature; Second temperature sensing device is positioned on the heat exchanger, for detection of the Tube Sheet of Heat Exchanger channel temp; The control mainboard, be connected respectively with electric expansion valve, first temperature sensing device and second temperature sensing device, be used for calculating the difference of compressor exhaust temperature and Tube Sheet of Heat Exchanger channel temp, to obtain the exhaust degree of superheat of air-conditioner, and when the exhaust degree of superheat was not in target exhaust degree of superheat scope, the aperture of the electric expansion valve of adjusting air-conditioner was to regulate the exhaust degree of superheat in target exhaust degree of superheat scope.
Further, the control mainboard comprises: first control module is used for when the exhaust degree of superheat during greater than the maximum in the target exhaust degree of superheat scope aperture increase of the electric expansion valve of control air-conditioner; And second control module, being used for when the exhaust degree of superheat during less than the minimum of a value in the target exhaust degree of superheat scope, the aperture of controlling the electric expansion valve of air-conditioner reduces.
Further, second temperature sensing device is the temperature-sensitive bag, and this temperature-sensitive bag is arranged at refrigerant in the heat exchanger tube and is in pipeline section under the saturation state.
Further, heat exchanger comprises indoor heat exchanger and outdoor heat exchanger, and second temperature sensing device comprises: the first temperature-sensitive bag is arranged on the indoor heat exchanger, for detection of the indoor heat exchanger pipe temperature; And the second temperature-sensitive bag, be arranged on the outdoor heat exchanger, for detection of the outdoor heat exchanger pipe temperature, the control mainboard also is used for when air-conditioner runs on refrigeration mode, calculate the difference of compressor exhaust temperature and outdoor heat exchanger pipe temperature, to obtain the exhaust degree of superheat of air-conditioner; And when air-conditioner runs on heating mode, calculate the difference of compressor exhaust temperature and indoor heat exchanger pipe temperature, to obtain the exhaust degree of superheat of air-conditioner.
Further, first temperature sensing device and second temperature sensing device are the temperature-sensitive bag, and wherein, first temperature sensing device is plugged in the first temperature-sensitive canning tube, and wherein, the first temperature-sensitive canning tube is welded on the blast pipe of compressor; And second temperature sensing device be plugged in the second temperature-sensitive canning tube, wherein, the second temperature-sensitive canning tube is welded on the heat exchanger.
Further, be provided with silica gel between first temperature sensing device and the first temperature-sensitive canning tube and between second temperature sensing device and the second temperature-sensitive canning tube.
By the present invention, adopt the control method of the air-conditioner that may further comprise the steps: the compressor exhaust temperature that detects air-conditioner; Detect the Tube Sheet of Heat Exchanger channel temp of air-conditioner; Calculate the difference of compressor exhaust temperature and Tube Sheet of Heat Exchanger channel temp, to obtain the exhaust degree of superheat of air-conditioner; The relation that compares the exhaust degree of superheat and target exhaust degree of superheat scope; And when the exhaust degree of superheat is not in target exhaust degree of superheat scope, the aperture of the electric expansion valve of adjusting air-conditioner is to regulate the exhaust degree of superheat in target exhaust degree of superheat scope, adopt the exhaust degree of superheat to come the electric expansion valve of regulating system, and in the process of regulating, exhaust degree of superheat bound is set, make which kind of environment temperature no matter air-conditioner be in, all can keep stablizing the exhaust degree of superheat, solved the too high or too low problem of air-conditioner suction superheat, and then reached control air-conditioner suction superheat in stable scope, thereby strengthen the effect of air-conditioner long-time running stability and reliability.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not constitute improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram according to the air-conditioner of the embodiment of the invention;
Fig. 2 is the control method according to the air-conditioner of first embodiment of the invention; And
Fig. 3 is the control method according to the air-conditioner of second embodiment of the invention.
The specific embodiment
Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
Fig. 1 is the schematic diagram according to the air-conditioner of the embodiment of the invention, as shown in Figure 1, this air-conditioner comprises control mainboard 1, electric expansion valve 2, compressor 8, cross valve 10, gas-liquid separator 9, indoor heat exchanger 7, outdoor heat exchanger 5, be positioned at the exhaust outlet of compressor 8 exhaust temperature-sensitive bag 3, be positioned at the pipe temperature temperature-sensitive bag 4 on the outdoor heat exchanger 5 and be positioned at pipe temperature temperature-sensitive bag 6 on the indoor heat exchanger 7, wherein, electric expansion valve 2, exhaust temperature-sensitive bag 3, the warm temperature-sensitive bag 4 of pipe and manage warm temperature-sensitive bag 6 and be connected with control mainboard 1 respectively.
Exhaust temperature-sensitive bag 3 (i.e. first temperature sensing device) is for detection of compressor 8 delivery temperatures.Manage warm temperature-sensitive bag 4 and manage the Guan Wen that warm temperature-sensitive bag 6 (i.e. second temperature sensing device) is respectively applied to sensing chamber's external heat exchanger 5 and indoor heat exchanger 7.Control mainboard 1 is used for calculating the difference of compressor 8 delivery temperatures and Tube Sheet of Heat Exchanger channel temp, to obtain the exhaust degree of superheat of air-conditioner, and when the exhaust degree of superheat was not in target exhaust degree of superheat scope, the aperture of the electric expansion valve 2 of adjusting air-conditioner was to regulate the exhaust degree of superheat in target exhaust degree of superheat scope.
The air-conditioner that adopts this embodiment to provide, come the electric expansion valve of regulating system by the exhaust degree of superheat, and in the process of regulating, exhaust degree of superheat bound is set, make which kind of environment temperature no matter air-conditioner be in, all can keep stablizing the exhaust degree of superheat, thereby the control of air-conditioner suction superheat in stable scope, is strengthened air-conditioner long-time running stability and reliability.
Preferably, control mainboard 1 comprises: first control module is used for when the exhaust degree of superheat during greater than the maximum in the target exhaust degree of superheat scope aperture increase of the electric expansion valve of control air-conditioner; And second control module, being used for when the exhaust degree of superheat during less than the minimum of a value in the target exhaust degree of superheat scope, the aperture of controlling the electric expansion valve of air-conditioner reduces.Adopt this preferred embodiment, when the exhaust degree of superheat surpasses higher limit, the electronic expansion valve opening of control air-conditioner increases, when the exhaust degree of superheat is lower than lower limit, the electronic expansion valve opening of control air-conditioner reduces, thereby guarantee the scope of air-conditioner suction superheat, strengthen air-conditioner long-time running stability and reliability.
Owing to also there is one section long tube connector from indoor heat exchanger to the compressor air suction mouth, refrigerant its pressure loss and heat loss in process of flowing is more, so the evaporation degree of superheat can not reflect the suction superheat of system well, preferably, when air-conditioner runs on refrigeration mode, calculate the difference of compressor 8 delivery temperatures and outdoor heat exchanger 5 pipe temperature, to obtain the exhaust degree of superheat of air-conditioner; And when air-conditioner runs on heating mode, calculate the difference of compressor 8 delivery temperatures and indoor heat exchanger 7 pipe temperature, to obtain the exhaust degree of superheat of air-conditioner.
From the condensation process of gaseous coolant heat exchanger that exhaust outlet of compressor is discharged, generally can pass through overheated, saturated (two-phase section), cross cold three phases.By the system high pressure that in experiment, detects and the pipe Wen Wendu of heat exchanger zones of different, can determine that refrigerant is in residing pipeline section, i.e. two-phase section under the saturation state.Preferably, second temperature sensing device then is arranged in the two-phase section that is determined by experiment, i.e. pipeline section under the saturation state of refrigerant in the Tube Sheet of Heat Exchanger is in order to obtain real Tube Sheet of Heat Exchanger channel temp.
Preferably, on blast pipe, indoor heat exchanger and outdoor heat exchanger, all be welded with the temperature-sensitive canning tube.Temperature-sensitive Bao Ze is plugged in the temperature-sensitive canning tube, and scribbles silica gel to guarantee good heat-conducting effect between the two.Outer machine mainboard and indoor set have connection to join, in order to obtain the indoor heat exchanger pipe temperature.
To sum up, by the air-conditioner that this specific embodiment provides, during air-conditioner unit start operation, mainboard detects to obtain delivery temperature and the pipe Wen Wendu of system's reality by the temperature-sensitive bag, and calculate both difference, afterwards this difference and the target exhaust degree of superheat that is determined by experiment are compared:
When detect actual difference less than the target exhaust degree of superheat that is determined by experiment under in limited time, then mainboard is exported the control signal that electric expansion valve is turned down, electric expansion valve turns down according to the program of setting, and improves the exhaust degree of superheat, makes its difference near the target exhaust degree of superheat;
When detect actual difference greater than the target exhaust degree of superheat that is determined by experiment in limited time, then mainboard output is opened big control signal to electric expansion valve, electric expansion valve is opened greatly according to the program of setting, and reduces the exhaust degree of superheat, makes its difference near the target exhaust degree of superheat;
When detecting actual difference between target exhaust degree of superheat lower limit and the upper limit time, then electric expansion valve keeps current state.So the exhaust degree of superheat of assurance system always operates in the rational temperature scope, to reach the purpose of the reliable and stable operation of protection air-conditioning unit.
Fig. 2 is the control method according to the air-conditioner of first embodiment of the invention, and as shown in Figure 2, this method comprises that following step S102 is to step S108.
Step S102: the compressor exhaust temperature and the Tube Sheet of Heat Exchanger channel temp that detect air-conditioner, this step can realize by temperature-sensitive bag detected temperatures is set in compressor air-discharging pipeline and heat exchanger tube, and the temperature-sensitive bag is respectively to be arranged in exhaust outlet of compressor for detection of the exhaust temperature-sensitive bag of delivery temperature and to be arranged on the heat exchanger pipe temperature temperature-sensitive bag for detection of Guan Wen.
Step S104: the difference of calculating compressor exhaust temperature and Tube Sheet of Heat Exchanger channel temp, to obtain the exhaust degree of superheat of air-conditioner, also be provided with mainboard outside on the machine, be connected the temperature computation exhaust degree of superheat that the mainboard controller detects according to the pipe thermometer bulb with the warm temperature-sensitive bag of pipe with exhaust temperature-sensitive bag.
Step S106: judge that the exhaust degree of superheat is whether in target exhaust degree of superheat scope, it also is the relation that the mainboard controller compares the exhaust degree of superheat and target exhaust degree of superheat scope, when the exhaust degree of superheat is not in target exhaust degree of superheat scope, execution in step S108, otherwise return step S102, continue to detect compressor exhaust temperature and the Tube Sheet of Heat Exchanger channel temp of air-conditioner.
Step S108: the aperture of regulating the electric expansion valve of air-conditioner, electric expansion valve also is connected with the mainboard controller, the mainboard controller is according to the relation of the exhaust degree of superheat and target exhaust degree of superheat scope, and the aperture of the electric expansion valve of adjusting air-conditioner is to regulate the exhaust degree of superheat in target exhaust degree of superheat scope.
Adopt the control mode of the air-conditioner that this embodiment provides, control the aperture of electric expansion valve by the exhaust degree of superheat, and in the process of regulating, target exhaust degree of superheat scope is set, make which kind of environment temperature no matter air-conditioner be in, all can keep stablizing the exhaust degree of superheat, thereby the control of air-conditioner suction superheat in stable scope, is strengthened air-conditioner long-time running stability and reliability.
Preferably, when the exhaust degree of superheat is not in target exhaust degree of superheat scope, the aperture of regulating the electric expansion valve of air-conditioner comprises: when the exhaust degree of superheat during greater than the maximum in the target exhaust degree of superheat scope, the aperture of the electric expansion valve of control air-conditioner increases; And when the exhaust degree of superheat during less than the minimum of a value in the target exhaust degree of superheat scope, the aperture of the electric expansion valve of control air-conditioner reduces.Adopt this preferred embodiment, when the exhaust degree of superheat surpasses higher limit, the electronic expansion valve opening of control air-conditioner increases, when the exhaust degree of superheat is lower than lower limit, the electronic expansion valve opening of control air-conditioner reduces, thereby guarantee the scope of air-conditioner suction superheat, strengthen air-conditioner long-time running stability and reliability.
Preferably, the aperture increase of the electric expansion valve of control air-conditioner comprises: the aperture of control electric expansion valve increases with the speed of 5B/20s; And the aperture of the electric expansion valve of control air-conditioner reduces to comprise: the aperture of control electric expansion valve reduces with the speed of 5B/20s, adopt the aperture of this preferred embodiment control electric expansion valve, can guarantee to detect the value that the temperature that obtains is defined as current aperture, namely improved the accuracy of temperature detection, thereby also improve the accuracy of electronic expansion valve opening control, make that the operation of air-conditioner is more stable.
From the condensation process of gaseous coolant heat exchanger that exhaust outlet of compressor is discharged, generally can pass through overheated, saturated (two-phase section), cross cold three phases.By the system high pressure that in experiment, detects and the pipe Wen Wendu of heat exchanger zones of different, can determine that refrigerant is in residing pipeline section, i.e. two-phase section under the saturation state.Preferably, the Tube Sheet of Heat Exchanger channel temp that detects air-conditioner comprises: detect the Tube Sheet of Heat Exchanger channel temp by the temperature-sensitive bag, wherein, this temperature-sensitive bag is arranged at refrigerant in the heat exchanger tube and is in pipeline section under the saturation state.
Owing to also there is one section long tube connector from indoor heat exchanger to the compressor air suction mouth, refrigerant its pressure loss and heat loss in process of flowing is more, so the evaporation degree of superheat can not reflect the suction superheat of system well, preferably, before the Tube Sheet of Heat Exchanger channel temp that detects air-conditioner, this method also comprises: the operational mode that detects air-conditioner, the Tube Sheet of Heat Exchanger channel temp that detects air-conditioner comprises: when the operational mode of air-conditioner is refrigeration mode, detect the outdoor heat exchanger pipe temperature of air-conditioner; And when the operational mode of air-conditioner is heating mode, detect the indoor heat exchanger pipe temperature of air-conditioner.
Air-conditioner when refrigeration, gaseous coolant condensation outdoor heat exchanger of the HTHP of discharging from compressor, so mainboard comes electric expansion valve is regulated by detecting delivery temperature and outdoor heat exchanger pipe temperature.When heating, gaseous coolant condensation indoor heat exchanger of the HTHP of discharging from compressor, so the time mainboard then regulate electric expansion valve by detecting delivery temperature and indoor heat exchanger pipe temperature, the principle of its adjusting is identical with refrigeration.The electronic Expansion Valve Control principle is shown in Figure 3: behind the unit operation, whether main frame detects unit at refrigerating operaton; When the unit heating operation, mainboard detects the Guan Wen of actual exhaust air temperature and indoor heat exchanger, and calculates the difference of the two; When refrigerating operaton, mainboard detects the Guan Wen of actual exhaust air temperature and outdoor heat exchanger, and calculates the difference of the two.When freezing or heating, according to the magnitude relationship of temperature gap and the target exhaust degree of superheat, regulate electric expansion valve, to regulate the exhaust degree of superheat in target exhaust degree of superheat scope, concrete process is as follows:
1, when T actual exhaust air temperature-T pipe temperature＜target exhaust degree of superheat lower limit, then turns down with the speed of electric expansion valve with 5B/20s.
2, when target exhaust degree of superheat lower limit≤T actual exhaust air temperature-T pipe temperature≤target exhaust degree of superheat higher limit, then electric expansion valve is kept current aperture.
3, when T actual exhaust air temperature-T pipe temperature＞target exhaust degree of superheat higher limit, then electric expansion valve is opened greatly with the speed of 5B/20s.
From above description, as can be seen, the present invention has realized following technique effect: adopt the exhaust degree of superheat to come the electric expansion valve of regulating system, and in the process of regulating, exhaust degree of superheat bound is set, make which kind of environment temperature no matter air-conditioner be in, all can keep stablizing the exhaust degree of superheat, make the air-conditioner suction superheat can control in stable scope, thereby strengthen stability and the reliability of air-conditioner long-time running.
Need to prove, can in the computer system such as one group of computer executable instructions, carry out in the step shown in the flow chart of accompanying drawing, and, though there is shown logical order in flow process, but in some cases, can carry out step shown or that describe with the order that is different from herein.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. the control method of an air-conditioner is characterized in that, comprising:
Detect the compressor exhaust temperature of described air-conditioner;
Detect the Tube Sheet of Heat Exchanger channel temp of described air-conditioner;
Calculate the difference of described compressor exhaust temperature and described Tube Sheet of Heat Exchanger channel temp, to obtain the exhaust degree of superheat of described air-conditioner;
The relation of the more described exhaust degree of superheat and target exhaust degree of superheat scope; And
When the described exhaust degree of superheat is not in described target exhaust degree of superheat scope, regulate the aperture of electric expansion valve of described air-conditioner to regulate the described exhaust degree of superheat in described target exhaust degree of superheat scope.
2. control method according to claim 1 is characterized in that, when the described exhaust degree of superheat was not in described target exhaust degree of superheat scope, the aperture of regulating the electric expansion valve of described air-conditioner comprised:
When the described exhaust degree of superheat during greater than the maximum in the described target exhaust degree of superheat scope, the aperture of controlling the electric expansion valve of described air-conditioner increases; And
When the described exhaust degree of superheat during less than the minimum of a value in the described target exhaust degree of superheat scope, the aperture of controlling the electric expansion valve of described air-conditioner reduces.
3. control method according to claim 2 is characterized in that,
The aperture increase of controlling the electric expansion valve of described air-conditioner comprises: control the aperture of described electric expansion valve with the speed increase of 5B/20s; And
The aperture of controlling the electric expansion valve of described air-conditioner reduces to comprise: the aperture of controlling described electric expansion valve reduces with the speed of 5B/20s.
4. control method according to claim 1 is characterized in that, the Tube Sheet of Heat Exchanger channel temp that detects described air-conditioner comprises:
Detect described Tube Sheet of Heat Exchanger channel temp by the temperature-sensitive bag, wherein, described temperature-sensitive bag is arranged at refrigerant in the described heat exchanger tube and is in pipeline section under the saturation state.
5. control method according to claim 1 is characterized in that,
Before the Tube Sheet of Heat Exchanger channel temp that detects described air-conditioner, described method also comprises: detect the operational mode of described air-conditioner,
The Tube Sheet of Heat Exchanger channel temp that detects described air-conditioner comprises: when the operational mode of described air-conditioner is refrigeration mode, detect the outdoor heat exchanger pipe temperature of described air-conditioner; And when the operational mode of described air-conditioner is heating mode, detect the indoor heat exchanger pipe temperature of described air-conditioner.
6. an air-conditioner is characterized in that, comprising:
Electric expansion valve;
Compressor;
Heat exchanger;
First temperature sensing device is positioned at the exhaust outlet of described compressor, for detection of described compressor exhaust temperature;
Second temperature sensing device is positioned on the described heat exchanger, for detection of described Tube Sheet of Heat Exchanger channel temp;
The control mainboard, be connected respectively with described electric expansion valve, described first temperature sensing device and described second temperature sensing device, be used for calculating the difference of described compressor exhaust temperature and described Tube Sheet of Heat Exchanger channel temp, to obtain the exhaust degree of superheat of described air-conditioner, and when the described exhaust degree of superheat is not in target exhaust degree of superheat scope, regulate the aperture of electric expansion valve of described air-conditioner to regulate the described exhaust degree of superheat in described target exhaust degree of superheat scope.
7. air-conditioner according to claim 6 is characterized in that, described control mainboard comprises:
First control module is used for controlling the aperture increase of the electric expansion valve of described air-conditioner when the described exhaust degree of superheat during greater than the maximum in the described target exhaust degree of superheat scope; And
Second control module is used for when the described exhaust degree of superheat during less than the minimum of a value in the described target exhaust degree of superheat scope, and the aperture of controlling the electric expansion valve of described air-conditioner reduces.
8. air-conditioner according to claim 6 is characterized in that, described second temperature sensing device is the temperature-sensitive bag, and described temperature-sensitive bag is arranged at refrigerant in the described heat exchanger tube and is in pipeline section under the saturation state.
9. according to claim 6 or 8 described air-conditioners, it is characterized in that,
Described heat exchanger comprises indoor heat exchanger and outdoor heat exchanger,
Described second temperature sensing device comprises: the first temperature-sensitive bag is arranged on the described indoor heat exchanger, for detection of described indoor heat exchanger pipe temperature; And the second temperature-sensitive bag, be arranged on the described outdoor heat exchanger, for detection of described outdoor heat exchanger pipe temperature,
Described control mainboard also is used for calculating the difference of described compressor exhaust temperature and described outdoor heat exchanger pipe temperature, to obtain the exhaust degree of superheat of described air-conditioner when described air-conditioner runs on refrigeration mode; And when described air-conditioner runs on heating mode, calculate the difference of described compressor exhaust temperature and described indoor heat exchanger pipe temperature, to obtain the exhaust degree of superheat of described air-conditioner.
10. air-conditioner according to claim 6 is characterized in that, described first temperature sensing device and described second temperature sensing device are the temperature-sensitive bag, wherein,
Described first temperature sensing device is plugged in the first temperature-sensitive canning tube, and wherein, the described first temperature-sensitive canning tube is welded on the blast pipe of described compressor; And
Described second temperature sensing device is plugged in the second temperature-sensitive canning tube, and wherein, the described second temperature-sensitive canning tube is welded on the described heat exchanger.
11. air-conditioner according to claim 10 is characterized in that, is being provided with silica gel between described first temperature sensing device and the described first temperature-sensitive canning tube and between described second temperature sensing device and the described second temperature-sensitive canning tube.
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| CN201210005386.6A CN103196202B (en) | 2012-01-09 | 2012-01-09 | Air conditioner and control method thereof |
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Cited By (36)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438547A (en) * | 2013-09-23 | 2013-12-11 | 深圳麦克维尔空调有限公司 | Control method of electronic expansion valve |
| CN103884140A (en) * | 2014-02-21 | 2014-06-25 | 海信（山东）空调有限公司 | Method and system for controlling discharge superheat degree of air conditioning compressor |
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