CN101086361A - Air conditioner and control method thereof - Google Patents
Air conditioner and control method thereof Download PDFInfo
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- CN101086361A CN101086361A CN 200610014092 CN200610014092A CN101086361A CN 101086361 A CN101086361 A CN 101086361A CN 200610014092 CN200610014092 CN 200610014092 CN 200610014092 A CN200610014092 A CN 200610014092A CN 101086361 A CN101086361 A CN 101086361A
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Abstract
The invention discloses an air-conditioner and the control method, wherein the air-conditioning includes a control unit which changes the set object pressure of the compressor according to the indoor load in order to make the difference between the high pressure and the low pressure in the set range when the air-conditioning is operated. The control method comprises the following steps: the first step, detecting the operation high pressure or the operation low pressure of the compressor; the second step, comparing the first step detected operation high pressure or operation low pressure with the set object high pressure or low pressure and judging the size; the third step, changing the object high pressure and the object low pressure until the object high pressure or the object low pressure is reached and driving the compressor. The invention avoids the high pressure difference, which protects the compressor better, and makes refrigeration and heat-production better.
Description
Technical field
What the present invention relates to is air-conditioning and control method thereof.
Background technology
Air-conditioning normally constitutes the air conditioning loop by compressor, condenser, evaporimeter and expander, to the building that is provided with air-conditioning or room supply cold air or hot gas, the device that carries out air conditioning.Air-conditioning is divided into separation type air-conditioning and integral air conditioner substantially.
The separation type air-conditioning is identical on function with integral air conditioner, but structurally have any different, the separation type air-conditioning is provided with indoor heat converter (evaporimeter or condenser) in indoor set, outdoor heat converter (condenser or evaporimeter) is set with compressor, be connected two devices by coolant piping in off-premises station.Integral air conditioner is arranged on indoor heat converter, outdoor heat converter and bloating plant in the device.
The kind of above-mentioned integral air conditioner has the window air conditioner that is arranged on the window, and is arranged on outdoorly, is connected to indoor pipeline type air-conditioning etc. by intake line and discharge line.The kind of above-mentioned separation type air-conditioning has the vertical air conditioner of upright setting, and extension wall-hanging air conditioner on the wall etc.
In addition, air-conditioning also is divided into only is used as the refrigeration special air conditioner that refrigeration machine uses, and the double as refrigeration machine, heats the heat pump air conditioner that machine uses.
Recently, the central air-conditioning that many indoor sets of connection on an above off-premises station are arranged that uses widely.This air-conditioning is controlled in the mode of Fig. 1 when freezing or heating usually.
Fig. 1 is a prior art air conditioning control method flow chart.
As shown in Figure 1, prior art air conditioning control method flow process is as follows: S1 when the operation of beginning refrigeration mode; Initial target high pressure or the low pressure S2 that sets compressor; Detect the operation high pressure and the operation low pressure data S3 of above-mentioned compressor; Compressor is carried out variable control S4; Up to detected operation high pressure and operation till low pressure reaches above-mentioned target high pressure or target low pressure.
In prior art air-conditioning and the control method thereof, when when carrying out the warm operation of low temperature system separately, because the power of compressor and heat exchanger is bigger, when improving compressor frequency in order to reach the target high pressure, the undue decline of low pressure can be occurred, the excessive phenomenon of height pressure reduction must be caused occurring.When excessive height pressure reduction occurring, if long-time running, then compressor can be impaired, causes carrying out operate as normal.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned technology, provide a kind of when carrying out the warm operation of low temperature system separately, detect the high pressure or the low-pressure state of outdoor compressor operating, calculate the poor of the high pressure of compressor operating and low pressure, by changing pressure reduction, allow high pressure and low pressure reduction be in the certain limit by indoor load.
The technical scheme that solves the problems of the technologies described above is:
A kind of air-conditioning when this air-conditioning comprises operation of air conditioner, changes the target pressure that compressor is set by indoor load, allows compressor high pressure and low pressure reduction enter the interior control module of setting range.
A kind of air conditioning control method, described control method is by carrying out as the next stage: by by being separately positioned on the pressure sensor of compressor suction side and discharge side, detect the 1st stage of compressor operating high pressure or operation low pressure; The a reference value of the operation high pressure that detects in above-mentioned the 1st stage or operation low pressure and setting---target high pressure or low pressure compare, judge the 2nd stage of size; According to the result who judges in above-mentioned the 2nd stage, change above-mentioned target high pressure or target low pressure, up to reach above-mentioned after changing the target high pressure or target low pressure till the 3rd stage of drive compression machine.
The invention has the beneficial effects as follows: when carrying out the warm operation of low temperature system separately; by changing desired value, allowing high pressure and low pressure reduction be in the certain limit by indoor load; to prevent excessive height pressure reduction; the better protection compressor; better freeze, heat work, can improve the convenience on using.
Description of drawings
Fig. 1 is a prior art air conditioning control method flow chart;
Fig. 2 is that air-conditioning of the present invention is provided with state diagram;
Fig. 3 is an air-conditioning schematic diagram of the present invention;
Fig. 4 is an air-conditioning johning knot composition of the present invention;
Fig. 5 is an air-conditioning control block diagram of the present invention;
Fig. 6 is an air conditioning control method flow chart of the present invention.
＜accompanying drawing critical piece remarks 〉
I ': indoor set 51: indoor heat converter
52: indoor blower 54: indoor electromagnetic expanding valve
56: the indoor set temperature measuring M of portion: main off-premises station
S1, S2: secondary off-premises station 60: outdoor heat converter
63,64: compressor 66: outdoor electromagnetic expanding valve
90: off-premises station temperature measuring portion 92: low pressure determination part
93: high-pressure determination part 100: control module
102: indoor control part 104: outdoor control part
The specific embodiment
Below, with reference to accompanying drawing 2 to 6, embodiments of the invention are elaborated.
Fig. 2 is that air-conditioning of the present invention is provided with state diagram; Fig. 3 is an air-conditioning schematic diagram of the present invention; Fig. 4 is an air-conditioning johning knot composition of the present invention; Fig. 5 is an air-conditioning control block diagram of the present invention; Fig. 6 is an air conditioning control method flow chart of the present invention.
The invention provides a kind of air-conditioning, when this air-conditioning comprises operation of air conditioner, change the target pressure that compressor is set, allow compressor high pressure and low pressure reduction enter the interior control module 100 of setting range by indoor load.
Described off-premises station is by the main off-premises station M with variable speed compressor 63 and constant speed compressor 64, and secondary off-premises station S1, the S2 formation with constant speed compressor 64.
Described control method is by carrying out as the next stage: by by being separately positioned on the pressure sensor of compressor suction side and discharge side, detect the 1st stage of compressor operating high pressure or operation low pressure; The a reference value of the operation high pressure that detects in above-mentioned the 1st stage or operation low pressure and setting---target high pressure or low pressure compare, judge the 2nd stage of size; According to the result who judges in above-mentioned the 2nd stage, change above-mentioned target high pressure or target low pressure, up to reach above-mentioned after changing the target high pressure or target low pressure till the 3rd stage of drive compression machine.
In described the 2nd stage, be operation high pressure to above-mentioned detection whether greater than a reference value---the target high pressure, judge; Be whether operation low pressure to above-mentioned detection is lower than a reference value---target low pressure, judge.
In described the 3rd stage, above-mentioned judged result if the operation high pressure greater than the target high pressure or the operation low pressure less than target low pressure, then change target high pressure and target low pressure after, the drive compression machine is till target high pressure that reaches change and target low pressure.
The compressor that is arranged on off-premises station when described air conditioning control method is used to control heating operation.
Above-mentioned off-premises station M, S1, S2 drive according to a certain at least needs among the indoor set I ', and along with the needs of indoor set I ', refrigerating/heating power increases.The operation platform number of off-premises station M, S1, S2 and the driven compressor number that is arranged on off-premises station M, S1, S2 also can increase.
Above-mentioned each indoor set I ' comprising: be arranged on the room air of each indoor set I ' and the indoor heat converter 51 that refrigerant carries out heat exchange; The room air that is arranged on each indoor set I ' is blowed to the indoor blowing fan 52 of above-mentioned indoor heat converter 51; When refrigeration, by degree of supercooling and the controlled indoor flow control division 54 of the degree of superheat---indoor electromagnetic expanding valve 54.
The effect of above-mentioned indoor heat converter 51 is: suck liquid refrigerants when air-conditioning freezes operation, allow liquid refrigerants that sucks and the room air heat exchange that needs refrigeration, evaporate, allow room air obtain cooling, play the evaporimeter effect; When air-conditioning heats operation, sucking gaseous coolant, allow gaseous coolant that sucks and the room air heat exchange that needs refrigeration, condensation takes place, allow room air obtain heating, play the condenser effect.
In above-mentioned indoor heat converter 51 courses of work, indoor set temperature detecting part 56 is that the refrigerant temperature by indoor heat converter 51 is detected.
Above-mentioned indoor blower 52 is made of 52a of indoor motor portion and indoor fan 52b.The described indoor motor 52a of portion controlled unit 100 controls also produce power; Described indoor fan 52b is connected with the 52a of indoor motor portion, rotates and produce wind-force under the 52a of indoor motor portion drives.
The main off-premises station M that above-mentioned several off-premises station M, S1, S2 are had nothing to do and worked always by the load with indoor set I ', and load is worked with being allowed a choice according to indoor set I ' secondary off-premises station S1, S2 constitute.
Above-mentioned main off-premises station M and secondary off-premises station S1, S2 comprise: allow the outdoor heat converter 60 of outdoor air and refrigerant heat exchange; Outdoor air is blowed to the outdoor draft fan 61 of outdoor heat converter 60; Only extract the fluid reservoir 62 of gaseous coolant; Two compressors 63,64 that the gaseous coolant that fluid reservoir 62 is extracted compresses; The four way valve 65 of conversion refrigerant flow direction; When carrying out heating operation, by degree of supercooling and the controlled outdoor flow control division 66 of the degree of superheat---outdoor use electromagnetic expanding valve 66.
The effect of above-mentioned outdoor heat converter 60 is: suck gaseous coolant when air-conditioning carries out refrigerating operaton, allow gaseous coolant condensation under the effect of outdoor air, play the condenser effect; When air-conditioning carries out heating operation, suck liquid refrigerants, allow the liquid refrigerants that sucks under the effect of outdoor air, evaporate, play the evaporimeter effect.
In a side of above-mentioned outdoor heat converter 60, be provided with the off-premises station temperature measuring portion 90 that can measure off-premises station M, S1, S2 outdoor temperature.
Above-mentioned outdoor draft fan 61 is made of 61a of outdoor motor portion and outdoor fan 61b.The described outdoor motor 61a of portion controlled unit 100 controls also produce power; Described outdoor fan 61b is connected with the 61a of outdoor motor portion, is rotated and produces wind-force under the 61a of outdoor motor portion dynamic action.
Two compressors 63 and 64 of above-mentioned main off-premises station M are respectively variable speed compressor and constant speed compressor.
Two compressors 66 of above-mentioned secondary off-premises station S1, S2 all are constant speed compressors.
Suction side and discharge side in above-mentioned compressor 63,64 are respectively arranged with low pressure determination part 92 and the high-pressure determination part 93 of measuring compressor 63,64 suction/discharge pressures.
Above-mentioned fluid reservoir 62 is to be connected with two compressors simultaneously, by shared.
Above-mentioned control module 100 is divided into the indoor control part 102 of control indoor set I ' and controls the outdoor control part 104 of off-premises station M, S1, S2.Indoor control part 102 and outdoor control part 104 interconnect.
Below, the refrigerating operaton operation principle of air-conditioning of the present invention is described.
As above-mentioned several indoor set I ' if in when having a request to carry out refrigerating operaton, after the refrigerant of compressor 63,64 compressions flows through four way valve 65, outdoor heat converter 60, outdoor use electromagnetic expanding valve 66, indoor electromagnetic expanding valve 54, indoor heat converter 51 successively, be recycled to compressor 63,64 by four way valve 65.Described refrigerant only flows through the indoor set worker that working and off-premises station M, S1, S2.
In the process of coolant piping P ' circulation, refrigerant is absorbed heat by the room air of indoor set I in indoor heat converter 51 at refrigerant, and indoor the obtaining that indoor set I is housed cooled off.
Above-mentioned indoor electromagnetic expanding valve 54 is controlled according to the degree of supercooling and the degree of superheat.
At this moment, above-mentioned outdoor use electromagnetic expanding valve 66 is in complete open state, so that allow refrigerant cross outdoor use electromagnetic expanding valve 66 with the state flow that does not expand.
On the contrary, as several indoor set I ' if in when having a request to carry out heating operation, after the refrigerant of above-mentioned compressor 63,64 compressions flows through four way valve 65, indoor heat converter 51, indoor electromagnetic expanding valve 54, outdoor use electromagnetic expanding valve 66, outdoor heat converter 60 successively, be recycled to compressor 63,64 by four way valve 65.
Refrigerant is emitted heat to the room air that is provided with indoor set I in above-mentioned indoor heat converter 51, indoor the obtaining that indoor set I is housed heated.
At this moment, above-mentioned indoor electromagnetic expanding valve 54 is in complete open state, so that allow refrigerant cross indoor electromagnetic expanding valve 54 with the state flow that does not expand.
Fig. 6 is an air conditioning control method flow chart of the present invention.Air conditioning control method of the present invention is by carrying out as the next stage:
Above-mentioned air-conditioning begins to freeze or heating mode operation phase S11.
Initial target high pressure or the target periods of low pressure S12 that sets compressor.
The compressor operating high pressure or the low pressure data phase S13 of work at present read in detection, promptly, the suction side of above-mentioned compressor and discharge side are provided with high pressure sensor and low pressure sensor respectively, when compressor operating, utilize high pressure sensor or low pressure sensor to measure operation high pressure or operation low pressure data.
The target high pressure or the target low pressure of the operation high pressure of said determination or operation low pressure and above-mentioned setting are compared, judge the operating state stage S14 of compressor, promptly, whether the operation high pressure to high pressure sensor measuring cell internal burden is higher than (or greater than) target high pressure is judged, whether the operation low pressure of low pressure sensor measuring cell internal burden is lower than target low pressure judges.
Here, above-mentioned target high pressure is set at 1853Kpa, target low pressure is set at 203Kpa and is advisable, but above-mentioned target high pressure and target low pressure can change by the state of compressor.When the target high pressure was set to 1853Kpa, whether whether the high pressure that detects operation surpasses 1853Kpa was judged, detect the low pressure of operation and judge less than 203Kpa.
When the operation high pressure that is judged as above-mentioned detection during greater than target low pressure, changes above-mentioned target high pressure and target low pressure less than target high pressure or operation low pressure, set stage S15 again.
On the contrary, when the operation high pressure that is judged as above-mentioned detection be higher than the target high pressure or judge above-mentioned operation low pressure whether with target low pressure same phase S16.
According to above-mentioned judged result,, above-mentioned compressor is carried out variable control, then stage S17 till above-mentioned operation low pressure reaches target low pressure if operation low pressure and target low pressure are inequality.
In addition,, when operation low pressure is identical with target low pressure, compressor is controlled, made it normal work stage S18 according to above-mentioned judged result.
As mentioned above; operation high pressure or operation low pressure to air-conditioning detect; the operation high pressure that detects or operation low pressure are compared with first target high pressure of setting or target low pressure and judge; controlling target changeably presses; above-mentioned high pressure and low pressure reduction are in the certain limit; prevent excessive height pressure reduction, can protect compressor.
Claims (6)
1. an air-conditioning is characterized in that: when comprising operation of air conditioner, change the target pressure that compressor is set by indoor load, allow compressor high pressure and low pressure reduction enter the interior control module (100) of setting range.
2. air-conditioning according to claim 1 is characterized in that: described off-premises station is by the main off-premises station M with variable speed compressor (63) and constant speed compressor (64), and secondary off-premises station S1, the S2 formation with constant speed compressor (64).
3. one kind according to air conditioning control method described in the claim 1, and it is characterized in that: described control method is by carrying out as the next stage:
By by being separately positioned on the pressure sensor of compressor suction side and discharge side, detect the 1st stage of compressor operating high pressure or operation low pressure;
The a reference value of the operation high pressure that detects in above-mentioned the 1st stage or operation low pressure and setting---target high pressure or low pressure compare, judge the 2nd stage of size;
According to the result who judges in above-mentioned the 2nd stage, change above-mentioned target high pressure or target low pressure, up to reach above-mentioned after changing the target high pressure or target low pressure till the 3rd stage of drive compression machine.
4. air conditioning control method according to claim 3 is characterized in that: in described the 2nd stage, be operation high pressure to above-mentioned detection whether greater than a reference value---the target high pressure, judge; Be whether operation low pressure to above-mentioned detection is lower than a reference value---target low pressure, judge.
5. air conditioning control method according to claim 3, it is characterized in that: in described the 3rd stage, above-mentioned judged result if the operation high pressure greater than the target high pressure or the operation low pressure less than target low pressure, after then changing target high pressure and target low pressure, the drive compression machine is till target high pressure that reaches change and target low pressure.
6. according to claim 3 or 4 described air conditioning control methods, it is characterized in that: the compressor that is arranged on off-premises station when described air conditioning control method is used to control heating operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610014092 CN101086361A (en) | 2006-06-06 | 2006-06-06 | Air conditioner and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610014092 CN101086361A (en) | 2006-06-06 | 2006-06-06 | Air conditioner and control method thereof |
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| CN101086361A true CN101086361A (en) | 2007-12-12 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102401521A (en) * | 2011-05-24 | 2012-04-04 | 宁波奥克斯电气有限公司 | Defrosting method in heating process of screw-compression multi-connected air conditioner |
| CN106440591A (en) * | 2016-10-28 | 2017-02-22 | 珠海格力电器股份有限公司 | Control method for high-pressure ratio of air conditioner, controller and air conditioner control system |
| WO2019071654A1 (en) * | 2017-10-12 | 2019-04-18 | 广东美的暖通设备有限公司 | Air conditioning system and pressure ratio control method and device thereof |
| CN109654780A (en) * | 2016-10-31 | 2019-04-19 | 珠海格力电器股份有限公司 | For controlling the control method and heat pump unit of the operation of compressor |
| CN111878966A (en) * | 2020-07-29 | 2020-11-03 | 海信（广东）空调有限公司 | Air conditioner and control method thereof |
| CN113188230A (en) * | 2021-04-16 | 2021-07-30 | 宁波奥克斯电气股份有限公司 | Expansion valve control method and device of multi-connected air conditioner and multi-connected air conditioner |
-
2006
- 2006-06-06 CN CN 200610014092 patent/CN101086361A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102401521A (en) * | 2011-05-24 | 2012-04-04 | 宁波奥克斯电气有限公司 | Defrosting method in heating process of screw-compression multi-connected air conditioner |
| CN106440591A (en) * | 2016-10-28 | 2017-02-22 | 珠海格力电器股份有限公司 | Control method for high-pressure ratio of air conditioner, controller and air conditioner control system |
| CN106440591B (en) * | 2016-10-28 | 2019-01-22 | 珠海格力电器股份有限公司 | A kind of air-conditioning high pressure ratio control method, controller and air-conditioner control system |
| CN109654780A (en) * | 2016-10-31 | 2019-04-19 | 珠海格力电器股份有限公司 | For controlling the control method and heat pump unit of the operation of compressor |
| CN109654780B (en) * | 2016-10-31 | 2020-04-10 | 珠海格力电器股份有限公司 | Control method for controlling operation of compressor and heat pump unit |
| WO2019071654A1 (en) * | 2017-10-12 | 2019-04-18 | 广东美的暖通设备有限公司 | Air conditioning system and pressure ratio control method and device thereof |
| US11293657B2 (en) | 2017-10-12 | 2022-04-05 | Gd Midea Heating & Ventilating Equipment Co., Ltd. | Air conditioning system and pressure ratio control method and device thereof |
| CN111878966A (en) * | 2020-07-29 | 2020-11-03 | 海信（广东）空调有限公司 | Air conditioner and control method thereof |
| CN111878966B (en) * | 2020-07-29 | 2022-05-17 | 海信（广东）空调有限公司 | Air conditioner and control method thereof |
| CN113188230A (en) * | 2021-04-16 | 2021-07-30 | 宁波奥克斯电气股份有限公司 | Expansion valve control method and device of multi-connected air conditioner and multi-connected air conditioner |
| CN113188230B (en) * | 2021-04-16 | 2022-06-28 | 宁波奥克斯电气股份有限公司 | Expansion valve control method and device of multi-connected air conditioner and multi-connected air conditioner |
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