CN103968494B - The control method of air conditioning system and air conditioning system - Google Patents
The control method of air conditioning system and air conditioning system Download PDFInfo
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- CN103968494B CN103968494B CN201310030883.6A CN201310030883A CN103968494B CN 103968494 B CN103968494 B CN 103968494B CN 201310030883 A CN201310030883 A CN 201310030883A CN 103968494 B CN103968494 B CN 103968494B
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Abstract
The invention discloses control method and the air conditioning system of a kind of air conditioning system, described control method comprises the steps: S1, when receiving the signal of switching cross valve, detection compressor outlet side and the pressure value P 1 and P2 of entrance side respectively；S2, pressure differential deltap P calculated between described P1 and described P2, and judge that Δ P, whether within the scope of predetermined pressure difference Δ P0, if Δ P is within the scope of Δ P0, then controls cross valve and performs commutation action；If Δ P ＜ Δ P0, then control compressor and increase capacity；If Δ P ＞ Δ P0, then control compressor and reduce capacity.Pressure reduction when cross valve commutation can be effectively controlled, it is ensured that cross valve commutation reliability by the control method of the present invention；Furthermore, it is possible to reduce cross valve commutation to produce bigger moment noise because pressure reduction is excessive.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly relate to control method and the air conditioning system of a kind of air conditioning system.
Background technology
Heating and air conditioner be generally of refrigeration, heat, defrost and oil return operational mode, the switching of these operational modes is to be in different on-positions by cross valve to realize, it is therefore desirable to controls cross valve and carries out commutation action.
At present, the commutation of cross valve is fixed action sequence pattern according to unit self and is carried out, it is substantially all and does not accounts for cross valve high and low side pressure reduction, state before commutating due to unit is had nothing in common with each other, during cross valve commutation, its high and low side pressure differential is the most different, if performing cross valve commutation according to fixed model can cause problems with:
If high-low pressure pressure reduction is too small when of cross valve commutation, cross valve commutation can be caused bad, thus " collaborating " phenomenon occurs；And when if high-low pressure pressure reduction is excessive when of cross valve commutation, cross valve commutation can be made to produce loud noise, and, the excessive produced impact of pressure reduction commutation can wash out cross valve, affects valve body reliability.
Summary of the invention
For above-mentioned prior art present situation, the technical problem to be solved is, it is provided that the control method of a kind of air conditioning system so that cross valve performs switch operation in suitable pressure differential range, to reduce noise and to improve reliability.
Another technical problem to be solved by this invention is, it is provided that a kind of air conditioning system, and its cross valve performs switch operation in suitable pressure differential range, to reduce noise and to improve reliability.
In order to solve above-mentioned technical problem, the control method of a kind of air conditioning system provided by the present invention, comprise the steps:
S1, when receiving the signal of switching cross valve, detection compressor outlet side and the pressure value P 1 and P2 of entrance side respectively；
S2, pressure differential deltap P calculated between described P1 and described P2, and judge that Δ P, whether within the scope of predetermined pressure difference Δ P0, if Δ P is within the scope of Δ P0, then enters step S3；If Δ P ＜ Δ P0, then enter step S4；If Δ P ＞ Δ P0, then enter step S5；
S3, control cross valve perform commutation action；
S4, control compressor increase capacity, then detection compressor outlet side and the pressure value P 1 and P2 of entrance side respectively, subsequently into step S2；
S5, control compressor reduce capacity, then detection compressor outlet side and the pressure value P 1 and P2 of entrance side respectively, subsequently into step S2.
Wherein in an embodiment, 0.1Mpa≤Δ P0≤1Mpa.
Wherein in an embodiment, the step controlling compressor increase capacity in described step S4 is that the running frequency making frequency-changeable compressor increases λ1。
Wherein in an embodiment, 15≤λ1≤25。
Wherein in an embodiment, the step controlling compressor reduction capacity in described step S5 is that the running frequency making frequency-changeable compressor reduces λ2。
Wherein in an embodiment, 20≤λ2≤30。
Wherein in an embodiment, in described step S2, also included before judging Δ P step whether within the scope of predetermined pressure difference Δ P0:
Judge whether elapsed time t exceedes scheduled time t0 from the signal receiving switching cross valve, if it is, enter step S3, if it is not, then enter next step.
Wherein in an embodiment, 50s≤t0≤70s.
A kind of air conditioning system provided by the present invention, including compressor, cross valve, indoor heat exchanger, outdoor heat exchanger, throttling arrangement and control device, it is respectively arranged with high pressure sensor and low pressure sensor on the outlet side of described compressor and the pipeline of entrance side, described control device is used for controlling described compressor and described cross valve, and described control device includes:
Data acquisition module, for gathering the pressure value P 1 and P2 of described high pressure sensor and described low pressure sensor respectively；
Data processing module, for calculating pressure differential deltap P between described P1 and described P2, and judges that Δ P, 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 perform 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.
Wherein in an embodiment, described compressor is frequency-changeable compressor.
The control method of air conditioning system provided by the present invention and air conditioning system; when unit perform defrost, oil return, power-off shut down after the action such as startup first time; and cross valve is when having commutation demand; detection compressor outlet side and pressure differential deltap P of entrance side; and Δ P is compared with preferable commutation pressure differential deltap P0; when Δ P is within the scope of Δ P0; then cross valve performs commutation action; as Δ P ＜ Δ P0; control compressor and increase capacity; to improve pressure reduction so that pressure reduction enters ideal commutation pressure limit；As Δ P ＞ Δ P0, control compressor and reduce capacity, make pressure reduction enter ideal commutation pressure differential range.So can effectively control pressure reduction when cross valve commutation, it is ensured that cross valve commutation reliability；Furthermore, it is possible to reduce cross valve commutation to produce bigger moment noise because pressure reduction is excessive.
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 controlling device of the air conditioning system in Fig. 2.
Detailed description of the invention
Below with reference to the accompanying drawings and in conjunction with the embodiments the present invention is described in detail.It should be noted that in the case of not conflicting, the feature in following embodiment and embodiment can be mutually combined.
In one of them embodiment of the present invention, it is provided that the control method of a kind of air conditioning system, as it is shown in figure 1, described control method comprises the steps:
S1, when receiving the signal of switching cross valve, detection compressor outlet side and the pressure value P 1 and P2 of entrance side respectively.
S2, pressure differential deltap P calculated between described P1 and described P2, and judge that Δ P, whether within the scope of predetermined pressure difference Δ P0, if Δ P is within the scope of Δ P0, then enters step S3；If Δ P ＜ Δ P0, then enter step S4；If Δ P ＞ Δ P0, then enter step S5.
S3, control cross valve and perform the commutation action electromagnetic valve power down of the cross valve (or power on).
S4, control compressor increase capacity, then detection compressor outlet side and the pressure value P 1 and P2 of entrance side respectively, subsequently into step S2.
S5, control compressor reduce capacity, then detection compressor outlet side and the pressure value P 1 and P2 of entrance side respectively, subsequently into step S2.
Above-mentioned control method is used can effectively to control pressure reduction time cross valve commutates, it is ensured that cross valve commutation reliability；Furthermore, it is possible to reduce cross valve commutation to produce bigger moment noise because pressure reduction is excessive.
Predetermined pressure difference Δ P0 can according to the parameter of cross valve own and the difference of system relative set, can test according to different units and be determined.In the present embodiment, Δ P0 is preferably 0.1Mpa～1Mpa, and this scope is possible not only to guarantee that cross valve normally works, and can reduce commutation noise.
Preferably, the described compressor in the present embodiment is frequency-changeable compressor, and the step controlling compressor increase capacity in described step S4 is that the running frequency making frequency-changeable compressor increases λ1.In order to avoid raising frequency is too fast, the problem causing compressor oil starvation, it is preferable that 15≤λ1≤25.Same, the step controlling compressor reduction capacity in described step S5 is that the running frequency making frequency-changeable compressor reduces λ2.Further, 20≤λ2≤30。
Compressor is in addition to using frequency-changeable compressor, it would however also be possible to employ the common compressor that capacity can regulate.
Preferably, in described step S2, also included before judging Δ P step whether within the scope of predetermined pressure difference Δ P0: judge whether elapsed time t exceedes scheduled time t0 from the signal receiving switching cross valve, if, then enter step S3, if it is not, then enter next step.Preferably, 50s≤t0≤70s.So, during t ＞ t0, cross valve enforces commutation action, and commutating period can be avoided long.
In another embodiment of the present invention, a kind of air conditioning system is provided, as shown in Figure 2, air conditioning system includes 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), high pressure sensor 270 and low pressure sensor 280 it is respectively arranged with on the described outlet side of compressor 210 and the pipeline of entrance side, described compressor 210, described cross valve 230, described high pressure sensor 270 and described low pressure sensor 280 all electrically connect with described control device.
As it is shown on figure 3, described control device includes:
Data acquisition module 310, for gathering the pressure value P 1 and P2 of described high pressure sensor 270 and described low pressure sensor 280 respectively；
Data processing module 320, for calculating pressure differential deltap P between described P1 and described P2, and judges that Δ P, 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 perform 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, can effectively control pressure reduction when cross valve commutation, it is ensured that cross valve commutation reliability；Furthermore, it is possible to reduce cross valve commutation to produce bigger moment noise because pressure reduction is excessive.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes more concrete and detailed, but therefore can not 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, it is also possible to make some deformation and improvement, these broadly fall into protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (9)
1. the control method of an air conditioning system, it is characterised in that comprise the steps:
S1, when receiving the signal of switching cross valve, detection compressor outlet side and the pressure value P 1 and P2 of entrance side respectively；
S2, judge from receive switching cross valve signal elapsed time t whether exceed scheduled time t0, if, then enter step S3, if not, calculate pressure differential deltap P between described P1 and described P2, and judge that Δ P, whether within the scope of predetermined pressure difference Δ P0, if Δ P is within the scope of Δ P0, then enters step S3；If Δ P ＜ Δ P0, then enter step S4；If Δ P ＞ Δ P0, then enter step S5；
S3, control cross valve perform commutation action；
S4, control compressor increase capacity, then detection compressor outlet side and the pressure value P 1 and P2 of entrance side respectively, subsequently into step S2；
S5, control compressor reduce capacity, then detection compressor outlet side and the pressure value P 1 and P2 of entrance side respectively, subsequently into step S2.
The control method of air conditioning system the most according to claim 1, it is characterised in that 0.1Mpa≤Δ P0≤1Mpa.
The control method of air conditioning system the most according to claim 1, it is characterised in that the step controlling compressor increase capacity in described step S4 is that the running frequency making frequency-changeable compressor increases λ1。
The control method of air conditioning system the most according to claim 3, it is characterised in that 15≤λ1≤25。
The control method of air conditioning system the most according to claim 1, it is characterised in that the step controlling compressor reduction capacity in described step S5 is that the running frequency making frequency-changeable compressor reduces λ2。
The control method of air conditioning system the most according to claim 5, it is characterised in that 20≤λ2≤30。
The control method of air conditioning system the most according to claim 1, it is characterised in that 50s≤t0≤70s.
8. an air conditioning system, including compressor, cross valve, indoor heat exchanger, outdoor heat exchanger, throttling arrangement and control device, it is respectively arranged with high pressure sensor and low pressure sensor on the outlet side of described compressor and the pipeline of entrance side, described control device is used for controlling described compressor and described cross valve, it is characterized in that, described control device includes:
Data acquisition module, for gathering the pressure value P 1 and P2 of described high pressure sensor and described low pressure sensor respectively；
Data processing module, for calculating pressure differential deltap P between described P1 and described P2, and judges that Δ P, whether within the scope of predetermined pressure difference Δ P0, and produces judgement information；
Control module, for when from receive switching cross valve signal elapsed time t be exceed scheduled time t0 or described judgement information represent that Δ P is within the scope of Δ P0 time, control described cross valve and perform commutation action, when from the signal receiving switching cross valve, elapsed time t is to represent Δ P ＜ Δ P0 not less than scheduled time t0 and described judgement information, control described compressor and increase capacity, when from the signal receiving switching cross valve, elapsed time t is to represent Δ P ＞ Δ P0 not less than scheduled time t0 and described judgement information, control described compressor and reduce capacity.
Air conditioning system the most according to claim 8, it is characterised in that described compressor is frequency-changeable compressor.
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| CN201310030883.6A CN103968494B (en) | 2013-01-25 | 2013-01-25 | The control method of air conditioning system and air conditioning system |
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| CN201310030883.6A CN103968494B (en) | 2013-01-25 | 2013-01-25 | The control method of air conditioning system and air conditioning system |
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| CN103968494B true CN103968494B (en) | 2016-08-03 |
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