CN103486689B - The control method of air-conditioner and device - Google Patents
The control method of air-conditioner and device Download PDFInfo
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- CN103486689B CN103486689B CN201310413933.9A CN201310413933A CN103486689B CN 103486689 B CN103486689 B CN 103486689B CN 201310413933 A CN201310413933 A CN 201310413933A CN 103486689 B CN103486689 B CN 103486689B
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Abstract
The invention discloses a kind of control method of air-conditioner, comprise the following steps: when air-conditioner runs the first preset time, control electric expansion valve and run with aperture B, start the indoor return air temperature T1 detecting air-conditioner in real time simultaneously; According to the operational mode of air-conditioner, calculate the difference obtaining indoor return air temperature T1 and the target temperature Ts detected in real time: △ T=T1-Ts under refrigeration mode, △ T=Ts-T1 under heating mode; Judge that △ T is when [Tb, Ta] is interior, according to the change of the indoor return air temperature of described real-time detection, the aperture controlling electric expansion valve correspondingly adjusts in a preset range value [B, C].The invention also discloses a kind of control device of air-conditioner.The present invention had both solved the phenomenon of the high frequent start-stop of air-conditioner with fixed frequency, achieved again the step-less adjustment of refrigerating capacity or heating capacity, reduced the fluctuation of transducer air conditioning room temperature.
Description
Technical field
The present invention relates to air-conditioner technical field, particularly relate to a kind of control method and device of air-conditioner.
Background technology
In prior art, frequency-conversion air-conditioning system is due to used frequency-changeable compressor, and its control method is the relation of environmentally temperature and design temperature, by changing the frequency of frequency-changeable compressor, realizes the control of temperature; Fixed frequency air conditioner system is due to used invariable frequency compressor, and its control method is the relation of environmentally temperature and design temperature, by startup-shutdown, realizes the control of temperature.
Air-conditioner with fixed frequency compares transducer air conditioning has following shortcoming in temperature control: because invariable frequency compressor frequency is immutable, air-conditioner start the initial stage, room heat up or cooling rate slow; After room reaches design temperature, often, cause room temperature to fluctuate large, user's comfort is poor for startup-shutdown, while affect compressor service life due to high frequent start-stop.
Although transducer air conditioning can change refrigerating capacity or heating capacity by regulating compressor frequency, when compressor low frequency is low not, refrigerating capacity or heating capacity adjustable extent wide not, still there is room temperature fluctuation.
Summary of the invention
Main purpose of the present invention is to provide a kind of control method and device of air-conditioner, and the temperature being intended to improve air-conditioner regulates efficiency.
The invention provides a kind of control method of air-conditioner, comprise the following steps:
When air-conditioner runs the first preset time, control electric expansion valve and run with aperture B, start the indoor return air temperature T1 detecting air-conditioner in real time simultaneously;
According to the operational mode of air-conditioner, calculate the difference obtaining indoor return air temperature T1 and the target temperature Ts detected in real time: △ T=T1-Ts under refrigeration mode, △ T=Ts-T1 under heating mode;
Judge that △ T is when [Tb, Ta] is interior, according to the change of the indoor return air temperature of described real-time detection, the aperture controlling electric expansion valve correspondingly adjusts in a preset range value [B, C].
Preferably, the aperture of described control electric expansion valve correspondingly adjusts and comprises in a preset range value [B, C]:
The aperture controlling electric expansion valve is interior with default step-length increasing or decreasing in a preset range value [B, C].
Preferably, described default step-length is 3/ minute-10/ minute.
Preferably, described Ta is 1.5-3.0, Tb be 0-1.0, B be 200-480, C is 400-180 or 100-150.
Preferably, the aperture of described control electric expansion valve also comprises while correspondingly adjusting in a preset range value [B, C]:
Under refrigeration mode, when judging that the indoor return air temperature detected in real time rises and continues the second preset time, stop the adjustment of electric expansion valve;
Under heating mode, when judging that the indoor return air temperature detected in real time declines and continues the 3rd preset time, stop the adjustment of electric expansion valve.
Preferably, also comprise while the adjustment of described stopping electric expansion valve:
After the current aperture of electric expansion valve is added a predetermined threshold value, as the aperture of electric expansion valve.
The embodiment of the present invention additionally provides a kind of control device of air-conditioner, and described control device comprises:
Temperature detecting module, for when air-conditioner runs the first preset time, controls electric expansion valve and runs with aperture B, start the indoor return air temperature T1 detecting air-conditioner in real time simultaneously;
Temperature computation module, for the operational mode according to air-conditioner, calculates the difference obtaining indoor return air temperature T1 and the target temperature Ts detected in real time: △ T=T1-Ts under refrigeration mode, △ T=Ts-T1 under refrigeration mode;
Control module, judges that △ T is when [Tb, Ta] is interior, and according to the change of the indoor return air temperature of described real-time detection, the aperture controlling electric expansion valve correspondingly adjusts in a preset range value [B, C].
Preferably, described control module also for: the aperture controlling electric expansion valve in the preset range value [B, C] with default step-length increasing or decreasing.
Preferably, described control module also for: under refrigeration mode, when judging that the indoor return air temperature detected in real time rises and continues the second preset time, stop the adjustment of electric expansion valve;
Under heating mode, when judging that the indoor return air temperature detected in real time declines and continues the 3rd preset time, stop the adjustment of electric expansion valve.
Preferably, described control module also for: after the current aperture of electric expansion valve is added a predetermined threshold value, as the aperture of electric expansion valve.
Because the compressor frequency of air-conditioner with fixed frequency is immutable, therefore when indoor return air temperature is soon close to target temperature, by the change of electronic expansion valve opening, regulate refrigerating capacity or the heating capacity of air-conditioner, thus solve the phenomenon of high frequent start-stop.Transducer air conditioning, by the combination of the change of the change and compressor frequency that utilize electronic expansion valve opening, regulates refrigerating capacity or the heating capacity of air-conditioner, thus achieves the step-less adjustment of refrigerating capacity or heating capacity, reduces the fluctuation of transducer air conditioning room temperature.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of control method first embodiment of air-conditioner of the present invention;
Fig. 2 is the schematic flow sheet of control method second embodiment of air-conditioner of the present invention;
Fig. 3 is the high-level schematic functional block diagram of the control device preferred embodiment of air-conditioner 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
Technical scheme of the present invention is further illustrated below in conjunction with Figure of description and specific embodiment.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
With reference to Fig. 1, control method one embodiment of a kind of air-conditioner of the present invention is proposed.The control method of this embodiment air-conditioner comprises the following steps:
Step S110, when air-conditioner runs the first preset time, control electric expansion valve and run with aperture B, detect the indoor return air temperature T1 of air-conditioner simultaneously in real time;
After starting air-conditioner, air-conditioner, by with the mode operation of respective settings, such as, according to control model when starting, controls air-conditioner and run in the operational factor start that corresponding control model is corresponding, and electric expansion valve runs with aperture A.In the present embodiment, this aperture A is 200-480, and being 300 under being preferably refrigeration mode, is 350 under heating mode.The refrigerant circulation making air-conditioner in start-up phase maximizes by arranging of this aperture A, provides condition for realizing fast-refrigerating or heating fast.
After air-conditioner runs the first preset time N1, electric expansion valve is run with aperture B, also will detect the indoor return air temperature T1 of air-conditioner in real time simultaneously.In the present embodiment, this first preset time N1 is 20-300s, preferably N1=60s, N1=200s under heating mode under refrigeration mode; Aperture B is 200-480, preferably B=250, B=300 under heating mode under refrigeration mode.The setting of this first preset time N1 and aperture B is to make air-conditioner refrigerating capacity or heating capacity when the temperature adjusting stage maximize, realizing fast-refrigerating or heat fast.Certainly; do not limit the value of the first preset time N1 and aperture B; as long as make to run the first preset time N1 at air-conditioner, when the aperture of electric expansion valve is B, the refrigerating capacity of air-conditioner when the temperature adjusting stage or heating capacity maximize and fall within the scope of protection of the present invention.In the present embodiment, by the temperature-sensitive bag on indoor heat exchanger, indoor return air temperature T1 is detected.
Step S120, operational mode according to air-conditioner, calculate the difference obtaining indoor return air temperature T1 and the target temperature Ts detected in real time: △ T=T1-Ts under refrigeration mode, △ T=Ts-T1 under refrigeration mode;
In sensing chamber during return air temperature T1, by the operational mode according to air-conditioner, calculate the difference obtaining indoor return air temperature T1 and the target temperature Ts detected in real time: △ T=T1-Ts under refrigeration mode, △ T=Ts-T1 under refrigeration mode.
Step S130, judging △ T whether in [Tb, Ta], is proceed to step S140; Otherwise proceed to step S120.
Pre-set an interval value [Tb, Ta], in the present embodiment, this Ta is 0-1.0 DEG C, Tb is 1.5-3.0 DEG C, is preferably Ta=1 DEG C, Tb=2 DEG C.After calculating obtains △ T, then judge whether △ T is positioned in [Tb, Ta].When not when [Tb, Ta] is interior, continue to run with the current aperture of electric expansion valve by controlling air-conditioner.
Step S140, change according to the indoor return air temperature T1 of described real-time detection, the aperture controlling electric expansion valve correspondingly adjusts in a preset range value [B, C].
When judging that △ T is positioned at [Tb, Ta] interior time, then according to the change of the indoor return air temperature T1 detected in real time, control electric expansion valve correspondingly to adjust, be specially: when air-conditioner runs in a heating mode, if the indoor return air temperature T1 detected in real time continues in rising trend, then continue adjustment electric expansion valve, progressively reduce heating capacity; When air-conditioner runs in cooling mode, if the indoor return air temperature T1 detected in real time continues on a declining curve, then continue adjustment electric expansion valve, progressively reduce refrigerating capacity.In the present embodiment, B is 200-480.According to system matches situation, the aperture of electric expansion valve is different from the corresponding relation that refrigerating capacity or heating capacity reduce.Aperture such as when electric expansion valve is larger, and refrigerating capacity is less, then C is 400-480; When the aperture of electric expansion valve is less, refrigerating capacity is less, then C is 100-150.
Further, the adjustment of above-mentioned electric expansion valve also comprises: the aperture controlling electric expansion valve is interior with default step-length increasing or decreasing in a preset range value [B, C].As C>B, then the aperture controlling electric expansion valve increases progressively between [B, C]; As C<B, then the aperture controlling electric expansion valve is successively decreased between [B, C].Presetting step-length in the present embodiment is 3/ minute-10/ minute, is preferably 5/ minute.Certainly, the adjustment of this electric expansion valve does not limit its above-mentioned default step-wise fashion increasing or decreasing, such as, can also be previous stage growth rate faster than the latter half growth rate etc.
Because the compressor frequency of air-conditioner with fixed frequency is immutable, therefore when indoor return air temperature is soon close to target temperature, by the change of electronic expansion valve opening, regulate refrigerating capacity or the heating capacity of air-conditioner, thus solve the phenomenon of high frequent start-stop.Transducer air conditioning, by the combination of the change of the change and compressor frequency that utilize electronic expansion valve opening, regulates refrigerating capacity or the heating capacity of air-conditioner, thus achieves the step-less adjustment of refrigerating capacity or heating capacity, reduces the fluctuation of transducer air conditioning room temperature.
Further, with reference to Fig. 2, control method second embodiment of air-conditioner of the present invention is proposed.Based on above-described embodiment, the present embodiment also comprises while the aperture of above-mentioned control electric expansion valve correspondingly adjusts in a preset range value [B, C]:
Under step S150, refrigeration mode, when judging that the indoor return air temperature detected in real time rises and continues the second preset time, stop the adjustment of electric expansion valve; Under heating mode, when judging that the indoor return air temperature detected in real time declines and continues the 3rd preset time, stop the adjustment of electric expansion valve.This second preset time can be equal with the value of the 3rd preset time, also can be unequal.In the present embodiment, the second preset time and the 3rd preset time are 1-5 minute, are preferably 2 minutes.
The present embodiment, by judging whether the adjustment that will stop electric expansion valve according to the change of the indoor return air temperature detected in real time, if desired then stops the adjustment of electric expansion valve in time, thus adjusts refrigerating capacity or heating capacity exactly.
Further, also comprise while the adjustment of the stopping electric expansion valve of above-described embodiment:
Step S160, the current aperture of electric expansion valve is added a predetermined threshold value after, as the aperture of electric expansion valve.When electric expansion valve stops adjustment, normally freeze to ensure that electric expansion valve returns to or heat state, the aperture of electric expansion valve when stopping adjusting can be added a predetermined threshold value.
If C>B, then predetermined threshold value is-20 ~-5, is preferably-10; If C<B, then predetermined threshold value is 5-20, is preferably 10.
Be described in detail with the running of air-conditioner with fixed frequency under refrigeration mode and heating mode below:
(1) under this refrigeration mode, the running of air-conditioner with fixed frequency is as follows:
A1, air-conditioner are pressed the start of the condition such as set model, design temperature and are run, and electric expansion valve runs with aperture 300 simultaneously;
When a2, air-conditioner 60s running time, start return air temperature T1 in real-time sensing chamber, electric expansion valve runs with aperture 250 simultaneously;
A3, when 2 > T1-Ts >=1, adjust controlling the electric expansion valve of air-conditioner between open range 250 ~ 400, change from aperture 250 to aperture 400, variable quantity is aperture 5/ minute;
A4, while adjustment expansion valve opening return air temperature T1 in real-time sensing chamber, under refrigeration mode, if the indoor return air temperature T1 detected continues to decline, then continue adjustment expansion valve opening, if the indoor return air temperature T1 detected rises and continues 2 minutes, stop adjustment expansion valve opening, and run with current expansion valve opening-10.
A5, when indoor return air temperature reaches target temperature, the compressor of air-conditioner will quit work, and restart until indoor return air temperature reaches turn-on temperature again, and repeat step a2, a3, a4 run.
(2) under heating mode, the running of air-conditioner with fixed frequency is as follows:
B1, air-conditioner are pressed the start of the condition such as set model, design temperature and are run, and electric expansion valve runs with aperture 350 simultaneously;
When b2, air-conditioner 200s running time, start return air temperature T1 in real-time sensing chamber, electric expansion valve runs with aperture 300 simultaneously;
B3, when 2 > Ts-T1 >=1, adjusted by the electric expansion valve of air-conditioner, change from aperture 300 to aperture 400 between open range 300 ~ 400, variable quantity is aperture 5/ minute;
B4, while adjustment expansion valve opening return air temperature T1 in real-time sensing chamber, under heating mode, if when the indoor return air temperature T1 detected continues to rise, then continue adjustment expansion valve opening, if the indoor return air temperature T1 detected declines and continues 2 minutes, stop adjustment expansion valve opening, and run with current expansion valve opening-10.
B5, when indoor return air temperature reaches target temperature, the compressor of air-conditioner will quit work, and restart until indoor return air temperature reaches turn-on temperature again, and repeat step b2, b3, b4 run.
From the running of above-mentioned air-conditioner with fixed frequency, because the frequency of air-conditioner with fixed frequency is immutable, so when carrying out temperature and regulating, refrigerating capacity and heating capacity can be regulated by electric expansion valve, thus solve the phenomenon of high frequent start-stop.
Also be described in detail with the running of transducer air conditioning under refrigeration mode and heating mode below:
(1) running of refrigeration mode down coversion air-conditioner is as follows:
C1, air-conditioner are pressed the start of the condition such as set model, design temperature and are run, and electric expansion valve runs with aperture 300 simultaneously;
When c2, air-conditioner 60s running time, start return air temperature T1 in real-time sensing chamber, electric expansion valve runs with aperture 250 simultaneously;
C3, when 2 > T1-Ts >=1, control the electric expansion valve of air-conditioner and run between open range 250 ~ 400, change from aperture 250 to aperture 400, variable quantity is aperture 5/ minute;
C4, while adjustment electronic expansion valve opening return air temperature T1 in real-time sensing chamber, under refrigeration mode, the indoor return air temperature T1 detected continues to decline, can continue to adjust electronic expansion valve opening, if the indoor return air temperature T1 detected rises and continues 2 minutes, stop adjustment electronic expansion valve opening, run with current expansion valve opening-10.
(2) running of heating mode down coversion air-conditioner is as follows:
D1, air-conditioner are pressed the start of the condition such as set model, design temperature and are run, and electric expansion valve runs with aperture 350 simultaneously;
When d2, air-conditioner 200s running time, start return air temperature T1 in real-time sensing chamber, electric expansion valve runs with aperture 300 simultaneously;
D3, when 2 > Ts-T1 >=1, control the electric expansion valve of air-conditioner and run between open range 300 ~ 400, change from aperture 300 to aperture 400, variable quantity is aperture 5/ minute;
D4, while adjustment electronic expansion valve opening return air temperature T1 in real-time sensing chamber, under heating mode, if the indoor return air temperature T1 detected continues to rise, then continue the aperture of adjustment electric expansion valve, if the indoor return air temperature T1 detected declines and continues 2 minutes, then stop the aperture of adjustment electric expansion valve, run with Current electronic expansion valve opening-10.
From the running of above-mentioned transducer air conditioning, when air-conditioner carries out temperature adjustment, not only by frequency adjustment refrigerating capacity or the heating capacity of compressor, simultaneously also in conjunction with the adjustment of electric expansion valve, thus achieve the step-less adjustment of refrigerating capacity or heating capacity, reduce the temperature fluctuation in room, the temperature that improve air-conditioner regulates efficiency.
With reference to Fig. 3, control device first embodiment of a kind of air-conditioner of the present invention is proposed.The control device of the air-conditioner of this embodiment comprises:
Temperature detecting module 110, for when air-conditioner runs the first preset time, controls electric expansion valve and runs with aperture B, start the indoor return air temperature T1 detecting air-conditioner in real time simultaneously;
Temperature computation module 120, for the operational mode according to air-conditioner, calculates the difference obtaining indoor return air temperature T1 and the target temperature Ts detected in real time: △ T=T1-Ts under refrigeration mode, △ T=Ts-T1 under refrigeration mode;
Control module 130, judges that △ T is when [Tb, Ta] is interior, and according to the change of the indoor return air temperature of described real-time detection, the aperture controlling electric expansion valve correspondingly adjusts in a preset range value [B, C].
After starting air-conditioner, air-conditioner, by with the mode operation of respective settings, such as, according to control model when starting, controls air-conditioner and run in the operational factor start that corresponding control model is corresponding, and electric expansion valve runs with aperture A.In the present embodiment, this aperture A is 200-480, and being 300 under being preferably refrigeration mode, is 350 under heating mode.The refrigerant circulation making air-conditioner in start-up phase maximizes by arranging of this aperture A, provides condition for realizing fast-refrigerating or heating fast.
After air-conditioner runs the first preset time N1, electric expansion valve is run with aperture B, also will detect the indoor return air temperature T1 of air-conditioner in real time simultaneously.In the present embodiment, this first preset time N1 is 20-300s, preferably N1=60s, N1=200s under heating mode under refrigeration mode; Aperture B is 200-480, preferably B=250, B=300 under heating mode under refrigeration mode.The setting of this first preset time N1 and aperture B is to make air-conditioner refrigerating capacity or heating capacity when the temperature adjusting stage maximize, realizing fast-refrigerating or heat fast.Certainly; do not limit the value of the first preset time N1 and aperture B; as long as make to run the first preset time N1 at air-conditioner, when the aperture of electric expansion valve is B, the refrigerating capacity of air-conditioner when the temperature adjusting stage or heating capacity maximize and fall within the scope of protection of the present invention.In the present embodiment, by the temperature-sensitive bag on indoor heat exchanger, indoor return air temperature T1 is detected.
In sensing chamber during return air temperature T1, the difference of this indoor return air temperature T1 and target temperature Ts is carried out mathematic interpolation, to obtain the temperature difference △ T=|T1-Ts| between indoor return air temperature T1 and target temperature Ts.
Pre-set an interval value [Tb, Ta], in the present embodiment, this Ta is 0-1.0 DEG C, Tb is 1.5-3.0 DEG C, is preferably Ta=1 DEG C, Tb=2 DEG C.After calculating obtains △ T, then judge whether △ T is positioned in [Tb, Ta].When not when [Tb, Ta] is interior, continue to run with the current aperture of electric expansion valve by controlling air-conditioner.
When judging that △ T is positioned at [Tb, Ta] interior time, then according to the change of the indoor return air temperature T1 detected in real time, control electric expansion valve correspondingly to adjust, be specially: when air-conditioner runs in a heating mode, if the indoor return air temperature T1 detected in real time continues in rising trend, then continue adjustment electric expansion valve, progressively reduce heating capacity; When air-conditioner runs in cooling mode, if the indoor return air temperature T1 detected in real time continues on a declining curve, then continue adjustment electric expansion valve, progressively reduce refrigerating capacity.In the present embodiment, B is 200-480.According to system matches situation, the aperture of electric expansion valve is different from the corresponding relation that refrigerating capacity or heating capacity reduce.Such as, when the aperture of electric expansion valve is larger, refrigerating capacity is less, then C is 400-480; When the aperture of electric expansion valve is less, refrigerating capacity is less, then C is 100-150.
Further, described control module 130 also for: the aperture controlling electric expansion valve in the preset range value [B, C] with default step-length increasing or decreasing.
Particularly, as C>B, then the aperture controlling electric expansion valve increases progressively between [B, C]; As C<B, then the aperture controlling electric expansion valve is successively decreased between [B, C].Presetting step-length in the present embodiment is 3/ minute-10/ minute.Certainly, the adjustment of this electric expansion valve does not limit its above-mentioned default step-wise fashion increasing or decreasing, such as, can also be previous stage growth rate faster than the latter half growth rate etc.
Because the compressor frequency of air-conditioner with fixed frequency is immutable, therefore when indoor return air temperature is soon close to target temperature, by the change of electronic expansion valve opening, regulate refrigerating capacity or the heating capacity of air-conditioner, thus solve the phenomenon of high frequent start-stop.Transducer air conditioning, by the combination of the change of the change and compressor frequency that utilize electronic expansion valve opening, regulates refrigerating capacity or the heating capacity of air-conditioner, thus achieves the step-less adjustment of refrigerating capacity or heating capacity, reduces the fluctuation of transducer air conditioning room temperature.
Further, described control module 130 also for: under refrigeration mode, when judging that the indoor return air temperature detected in real time rises and continues the second preset time, stop the adjustment of electric expansion valve; Under heating mode, when judging that the indoor return air temperature detected in real time declines and continues the 3rd preset time, stop the adjustment of electric expansion valve.This second preset time can be equal with the value of the 3rd preset time, also can be unequal.In the present embodiment, the second preset time and the 3rd preset time are 1-5 minute, are preferably 2 minutes.
The present embodiment, by judging whether the adjustment that will stop electric expansion valve according to the change of the indoor return air temperature detected in real time, if desired then stops the adjustment of electric expansion valve in time, thus adjusts refrigerating capacity or heating capacity exactly.
Further, described control module 130 also for: after the current aperture of electric expansion valve is added a predetermined threshold value, as the aperture of electric expansion valve.If C>B, then predetermined threshold value is-20 ~-5, is preferably-10; If C<B, then predetermined threshold value is 5-20, is preferably 10.When electric expansion valve stops adjustment, normally freeze to ensure that electric expansion valve returns to or heat state, the aperture of electric expansion valve when stopping adjusting can be added a predetermined threshold value.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that above-described embodiment method can add required general hardware platform by software and realize, hardware can certainly be passed through, but in a lot of situation, the former is better embodiment.Based on such understanding, technical scheme of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product is stored in a storage medium (as ROM/RAM, magnetic disc, CD), comprising some instructions in order to make a station terminal equipment (can be mobile phone, computer, server, or the network equipment etc.) perform method described in each embodiment of the present invention.
The foregoing is only the preferred embodiments of the present invention; not thereby its scope of the claims is limited; every utilize description of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; directly or indirectly be used in the technical field that other are relevant, be all in like manner included in scope of patent protection of the present invention.
Claims (8)
1. a control method for air-conditioner, is characterized in that, comprises the following steps:
When air-conditioner runs the first preset time, control electric expansion valve and run with aperture B, start the indoor return air temperature T1 detecting air-conditioner in real time simultaneously;
According to the operational mode of air-conditioner, calculate the difference obtaining indoor return air temperature T1 and the target temperature Ts detected in real time: △ T=T1-Ts under refrigeration mode, △ T=Ts-T1 under heating mode;
Judge that △ T is when [Tb, Ta] is interior, according to the change of the indoor return air temperature of described real-time detection, the aperture controlling electric expansion valve correspondingly adjusts in a preset range value [B, C] or [C, B]; Described [Tb, Ta] interval value for pre-setting;
Also comprise while the aperture of described control electric expansion valve correspondingly adjusts in a preset range value [B, C] or [C, B]:
Under refrigeration mode, when judging that the indoor return air temperature detected in real time rises and continues the second preset time, stop the adjustment of electric expansion valve;
Under heating mode, when judging that the indoor return air temperature detected in real time declines and continues the 3rd preset time, stop the adjustment of electric expansion valve.
2. the control method of air-conditioner according to claim 1, is characterized in that, the aperture of described control electric expansion valve correspondingly adjusts and comprises in a preset range value [B, C] or [C, B]:
The aperture controlling electric expansion valve increases progressively with default step-length in a preset range value [B, C]; Or
The aperture controlling electric expansion valve is interior with default increments in a preset range value [C, B].
3. the control method of air-conditioner according to claim 2, is characterized in that, described default step-length is 3/ minute-10/ minute.
4. the control method of air-conditioner according to claim 1, is characterized in that, described Ta is 1.5-3.0, Tb is 0-1.0.
5. the control method of air-conditioner according to claim 4, is characterized in that, also comprises while the adjustment of described stopping electric expansion valve:
After the current aperture of electric expansion valve is added a predetermined threshold value, as the aperture of electric expansion valve.
6. a control device for air-conditioner, is characterized in that, described control device comprises:
Temperature detecting module, for when air-conditioner runs the first preset time, controls electric expansion valve and runs with aperture B, start the indoor return air temperature T1 detecting air-conditioner in real time simultaneously;
Temperature computation module, for the operational mode according to air-conditioner, calculates the difference obtaining indoor return air temperature T1 and the target temperature Ts detected in real time: △ T=T1-Ts under refrigeration mode, △ T=Ts-T1 under refrigeration mode;
Control module, judges that △ T is when [Tb, Ta] is interior, and according to the change of the indoor return air temperature of described real-time detection, the aperture controlling electric expansion valve correspondingly adjusts in a preset range value [B, C] or [C, B]; Described [Tb, Ta] interval value for pre-setting;
Described control module also for: under refrigeration mode, when judging that the indoor return air temperature detected in real time rises and continues the second preset time, stop the adjustment of electric expansion valve;
Under heating mode, when judging that the indoor return air temperature detected in real time declines and continues the 3rd preset time, stop the adjustment of electric expansion valve.
7. the control device of air-conditioner according to claim 6, it is characterized in that, described control module also for: control the aperture of electric expansion valve at a preset range value [B, C] in increase progressively with default step-length or to control the aperture of electric expansion valve interior with default increments in a preset range value [C, B].
8. the control device of air-conditioner according to claim 6, is characterized in that, described control module also for: after the current aperture of electric expansion valve is added a predetermined threshold value, as the aperture of electric expansion valve.
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| CN103900222B (en) * | 2014-03-07 | 2017-05-24 | 广东美的暖通设备有限公司 | Method for cooling air conditioner electronic control frequency conversion module and air conditioner |
| CN104633862B (en) * | 2015-02-03 | 2018-01-09 | 深圳麦格米特电气股份有限公司 | The control method of electric expansion valve during a kind of refrigerating of convertible frequency air conditioner operation |
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