CN103968494A - Control method of air conditioning system and air conditioning system - Google Patents
Control method of air conditioning system and air conditioning system Download PDFInfo
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- CN103968494A CN103968494A CN201310030883.6A CN201310030883A CN103968494A CN 103968494 A CN103968494 A CN 103968494A CN 201310030883 A CN201310030883 A CN 201310030883A CN 103968494 A CN103968494 A CN 103968494A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000006073 displacement reaction Methods 0.000 abstract 2
- 239000003921 oil Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000010725 compressor oil Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 235000003642 hunger Nutrition 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000037351 starvation Effects 0.000 description 1
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Abstract
The invention discloses a control method of an air conditioning system and the air conditioning system, the control method comprises the following steps: s1, detecting pressure values P1 and P2 on the outlet side and the inlet side of the compressor respectively when receiving a signal for switching the four-way valve; s2, calculating a pressure difference delta P between the P1 and the P2, judging whether the delta P is within a range of a preset pressure difference delta P0, and controlling a four-way valve to execute reversing action if the delta P is within the range of delta P0; controlling the compressor to increase the displacement if Δ P < Δ P0; if Δ P > Δ P0, the compressor is controlled to reduce the displacement. The control method can effectively control the pressure difference when the four-way valve is reversed, and ensures the reversing reliability of the four-way valve; and moreover, the instant noise generated by overlarge pressure difference in the reversing of the four-way valve can be reduced.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly relate to a kind of control method and air-conditioning system of air-conditioning system.
Background technology
Heating and air conditioner conventionally has refrigeration, heats, defrost and oil return operational mode, and the switching of these operational modes is to realize in different on-positions by cross valve, therefore need to control the cross valve action that commutates.
At present, the commutation of cross valve according to unit self fixedly action sequence pattern carry out, substantially all do not consider cross valve high and low side pressure reduction, because the state before unit commutation is had nothing in common with each other, during cross valve commutation, its high and low side pressure differential is also different, if carry out cross valve commutation according to fixed mode, can cause following problem:
If high-low pressure pressure reduction is too small in the time of cross valve commutation, can causes cross valve commutation bad, thereby " collaborating " phenomenon occurs; And if cross valve commutation time high-low pressure pressure reduction is when excessive, can make cross valve commutation produce larger noise, and the impact that excessive pressure reduction commutation produces can wash out cross valve, affect valve body reliability.
Summary of the invention
For above-mentioned prior art present situation, technical problem to be solved by this invention is, a kind of control method of air-conditioning system is provided, and makes cross valve carry out switch operation in suitable pressure differential range, to reduce noise and to improve reliability.
Another technical problem to be solved by this invention is, a kind of air-conditioning system is provided, and its cross valve is carried out switch operation in suitable pressure differential range, to reduce noise and to improve reliability.
In order to solve the problems of the technologies described above, the control method of a kind of air-conditioning system provided by the present invention, comprises the steps:
S1, when receiving the signal that switches cross valve, detect respectively pressure value P 1 and the P2 of compressor outlet side and entrance side;
S2, calculate the pressure differential deltap P between described P1 and described P2, and judge that Δ P is whether within the scope of predetermined pressure difference Δ P0, if Δ P, within the scope of Δ P0, enters step S3; If Δ P < Δ P0, enters step S4; If Δ P > Δ P0, enters step S5;
S3, control cross valve are carried out commutation action;
S4, control compressor increase capacity, then detect respectively pressure value P 1 and the P2 of compressor outlet side and entrance side, then enter step S2;
S5, control compressor reduce capacity, then detect respectively pressure value P 1 and the P2 of compressor outlet side and entrance side, then enter step S2.
Therein in an embodiment, 0.1Mpa≤Δ P0≤1Mpa.
In an embodiment, the step that the control compressor in described step S4 increases capacity is to make the running frequency of frequency-changeable compressor increase λ therein
1.
Therein in an embodiment, 15≤λ
1≤ 25.
In an embodiment, the step that the control compressor in described step S5 reduces capacity is to make the running frequency of frequency-changeable compressor reduce λ therein
2.
Therein in an embodiment, 20≤λ
2≤ 30.
Therein in an embodiment, in described step S2, judging that whether Δ P also comprises before the step within the scope of predetermined pressure difference Δ P0:
Whether judgement elapsed time t of institute from receiving the signal that switches cross valve surpasses scheduled time t0, if so, enters step S3, if not, enters next step.
Therein in an embodiment, 50s≤t0≤70s.
A kind of air-conditioning system provided by the present invention, comprise compressor, cross valve, indoor heat exchanger, outdoor heat exchanger, throttling arrangement and control device, on the outlet side of described compressor and the pipeline of entrance side, be respectively arranged with high pressure sensor and low pressure sensor, described control device is used for controlling described compressor and described cross valve, and described control device comprises:
Data acquisition module, for gathering respectively pressure value P 1 and the P2 of described high pressure sensor and described low pressure sensor;
Data processing module, for calculating the pressure differential deltap P between described P1 and described P2, and judges that Δ P is whether within the scope of predetermined pressure difference Δ P0, and produces judgement information;
Control module, for when described judgement information represents that Δ P is within the scope of Δ P0, control described cross valve and carry out commutation action, when described judgement information represents Δ P < Δ P0, control described compressor and increase capacity, when described judgement information represents Δ P > Δ P0, control described compressor and reduce capacity.
In an embodiment, described compressor is frequency-changeable compressor therein.
The control method of air-conditioning system provided by the present invention and air-conditioning system, when unit is carried out the actions such as defrost, oil return, power-off start after shutting down first, and when cross valve has commutation demand, detect the pressure differential deltap P of compressor outlet side and entrance side, and Δ P and desirable commutation pressure differential deltap P0 are compared, when Δ P is within the scope of Δ P0, cross valve is carried out commutation action, when Δ P < Δ P0, control compressor and increase capacity, to improve pressure reduction, make pressure reduction enter desirable commutation pressure limit; When Δ P > Δ P0, control compressor and reduce capacity, make pressure reduction enter desirable commutation pressure differential range.Pressure reduction when can effectively control like this cross valve commutation, guarantees cross valve commutation reliability; And, can reduce cross valve commutation and because pressure reduction is excessive, produce larger moment noise.
Accompanying drawing explanation
Fig. 1 is the flow chart of the control method of the air-conditioning system in one of them embodiment of the present invention;
Fig. 2 is the system diagram of the air-conditioning system in one of them embodiment of the present invention;
Fig. 3 is the module map of the control device of the air-conditioning system in Fig. 2.
The specific embodiment
Below with reference to accompanying drawing, also the present invention is described in detail in conjunction with the embodiments.It should be noted that, in the situation that not conflicting, the feature in following embodiment and embodiment can combine mutually.
In one of them embodiment of the present invention, provide a kind of control method of air-conditioning system, as shown in Figure 1, described control method comprises the steps:
S1, when receiving the signal that switches cross valve, detect respectively pressure value P 1 and the P2 of compressor outlet side and entrance side.
S2, calculate the pressure differential deltap P between described P1 and described P2, and judge that Δ P is whether within the scope of predetermined pressure difference Δ P0, if Δ P, within the scope of Δ P0, enters step S3; If Δ P < Δ P0, enters step S4; If Δ P > Δ P0, enters step S5.
S3, control cross valve and carry out commutation action (the magnetic valve power down of cross valve or power on).
S4, control compressor increase capacity, then detect respectively pressure value P 1 and the P2 of compressor outlet side and entrance side, then enter step S2.
S5, control compressor reduce capacity, then detect respectively pressure value P 1 and the P2 of compressor outlet side and entrance side, then enter step S2.
Pressure reduction when adopting above-mentioned control method can effectively control cross valve commutation, guarantees cross valve commutation reliability; And, can reduce cross valve commutation and because pressure reduction is excessive, produce larger moment noise.
Predetermined pressure difference Δ P0 can be according to the difference of the parameter of cross valve own and system and relative set can be tested and determine according to different units.In the present embodiment, Δ P0 is preferably 0.1Mpa～1Mpa, and this scope not only can guarantee that cross valve normally works, and can reduce the noise that commutates.
Preferably, the described compressor in the present embodiment is frequency-changeable compressor, and the step that the control compressor in described step S4 increases capacity is to make the running frequency of frequency-changeable compressor increase λ
1.Too fast for fear of raising frequency, cause the problem of compressor oil starvation, preferably, 15≤λ
1≤ 25.Same, the step that the control compressor in described step S5 reduces capacity is to make the running frequency of frequency-changeable compressor reduce λ
2.Further, 20≤λ
2≤ 30.
Compressor except adopting frequency-changeable compressor, the common compressor that also can adopt capacity to regulate.
Preferably, in described step S2, judging that whether Δ P also comprises before the step within the scope of predetermined pressure difference Δ P0: whether judgement elapsed time t of institute from receiving the signal that switches cross valve surpasses scheduled time t0, if, enter step S3, if not, enter next step.Preferably, 50s≤t0≤70s.Like this, during t > t0, cross valve is executed commutation action, can avoid commutating period long.
In another embodiment of the present invention, a kind of air-conditioning system is provided, as shown in Figure 2, air-conditioning system comprises compressor 210, oil eliminator 220, cross valve 230, outdoor heat exchanger 240, indoor heat exchanger (not shown), throttling arrangement 250, gas-liquid separator 260 and control device (not shown), on the outlet side of described compressor 210 and the pipeline of entrance side, be respectively arranged with high pressure sensor 270 and low pressure sensor 280, described compressor 210, described cross valve 230, described high pressure sensor 270 and described low pressure sensor 280 are all electrically connected to described control device.
As shown in Figure 3, described control device comprises:
Data acquisition module 310, for gathering respectively pressure value P 1 and the P2 of described high pressure sensor 270 and described low pressure sensor 280;
Data processing module 320, for calculating the pressure differential deltap P between described P1 and described P2, and judges that Δ P is whether within the scope of predetermined pressure difference Δ P0, and produces judgement information;
Control module 330, for when described judgement information represents that Δ P is within the scope of Δ P0, control described cross valve 230 and carry out commutation action, when described judgement information represents Δ P < Δ P0, control described compressor 210 and increase capacity, when described judgement information represents Δ P > Δ P0, control described compressor 210 and reduce capacity.
Preferably, described compressor 210 is frequency-changeable compressor 210.
The air-conditioning system of the embodiment of the present invention, pressure reduction when can effectively control cross valve commutation, guarantees cross valve commutation reliability; And, can reduce cross valve commutation and because pressure reduction is excessive, produce larger moment noise.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a control method for air-conditioning system, is characterized in that, comprises the steps:
S1, when receiving the signal that switches cross valve, detect respectively pressure value P 1 and the P2 of compressor outlet side and entrance side;
S2, calculate the pressure differential deltap P between described P1 and described P2, and judge that Δ P is whether within the scope of predetermined pressure difference Δ P0, if Δ P, within the scope of Δ P0, enters step S3; If Δ P < Δ P0, enters step S4; If Δ P > Δ P0, enters step S5;
S3, control cross valve are carried out commutation action;
S4, control compressor increase capacity, then detect respectively pressure value P 1 and the P2 of compressor outlet side and entrance side, then enter step S2;
S5, control compressor reduce capacity, then detect respectively pressure value P 1 and the P2 of compressor outlet side and entrance side, then enter step S2.
2. the control method of air-conditioning system according to claim 1, is characterized in that, 0.1Mpa≤Δ P0≤1Mpa.
3. the control method of air-conditioning system according to claim 1, is characterized in that, the step that the control compressor in described step S4 increases capacity is to make the running frequency of frequency-changeable compressor increase λ
1.
4. the control method of air-conditioning system according to claim 3, is characterized in that, 15≤λ
1≤ 25.
5. the control method of air-conditioning system according to claim 1, is characterized in that, the step that the control compressor in described step S5 reduces capacity is to make the running frequency of frequency-changeable compressor reduce λ
2.
6. the control method of air-conditioning system according to claim 5, is characterized in that, 20≤λ
2≤ 30.
7. the control method of air-conditioning system according to claim 1, is characterized in that, in described step S2, is judging that whether Δ P also comprises before the step within the scope of predetermined pressure difference Δ P0:
Whether judgement elapsed time t of institute from receiving the signal that switches cross valve surpasses scheduled time t0, if so, enters step S3, if not, enters next step.
8. the control method of air-conditioning system according to claim 7, is characterized in that, 50s≤t0≤70s.
9. an air-conditioning system, comprise compressor, cross valve, indoor heat exchanger, outdoor heat exchanger, throttling arrangement and control device, on the outlet side of described compressor and the pipeline of entrance side, be respectively arranged with high pressure sensor and low pressure sensor, described control device is used for controlling described compressor and described cross valve, it is characterized in that, described control device comprises:
Data acquisition module, for gathering respectively pressure value P 1 and the P2 of described high pressure sensor and described low pressure sensor;
Data processing module, for calculating the pressure differential deltap P between described P1 and described P2, and judges that Δ P is whether within the scope of predetermined pressure difference Δ P0, and produces judgement information;
Control module, for when described judgement information represents that Δ P is within the scope of Δ P0, control described cross valve and carry out commutation action, when described judgement information represents Δ P < Δ P0, control described compressor and increase capacity, when described judgement information represents Δ P > Δ P0, control described compressor and reduce capacity.
10. air-conditioning system according to claim 9, is characterized in that, described compressor is frequency-changeable compressor.
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|---|---|---|---|
| CN201310030883.6A CN103968494B (en) | 2013-01-25 | 2013-01-25 | Control method of air conditioning system and air conditioning system |
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| CN201310030883.6A CN103968494B (en) | 2013-01-25 | 2013-01-25 | Control method of air conditioning system and air conditioning system |
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| CN103968494B CN103968494B (en) | 2016-08-03 |
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| CN107923643A (en) * | 2015-08-18 | 2018-04-17 | 大金工业株式会社 | Air conditioner |
| CN105972850B (en) * | 2016-05-05 | 2018-07-13 | 广东美的制冷设备有限公司 | Air-conditioner control method and device |
| CN109406042A (en) * | 2018-10-24 | 2019-03-01 | 四川长虹空调有限公司 | Transducer air conditioning pressure data approximating method |
| CN110107983A (en) * | 2019-05-05 | 2019-08-09 | 珠海格力电器股份有限公司 | Air conditioning unit and four-way valve reversing state detection method, device and system thereof |
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| CN113007917A (en) * | 2021-02-22 | 2021-06-22 | 珠海格力电器股份有限公司 | Air conditioner and control method thereof |
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| CN113685978B (en) * | 2021-08-26 | 2022-11-25 | 珠海拓芯科技有限公司 | Air conditioner control method, air conditioner control device and air conditioner |
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