CN104101054A - Control method and system of variable refrigerant flow (VRF) air conditioner - Google Patents
Control method and system of variable refrigerant flow (VRF) air conditioner Download PDFInfo
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- CN104101054A CN104101054A CN201410320620.3A CN201410320620A CN104101054A CN 104101054 A CN104101054 A CN 104101054A CN 201410320620 A CN201410320620 A CN 201410320620A CN 104101054 A CN104101054 A CN 104101054A
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Abstract
The invention provides a control method and system of a variable refrigerant flow (VRF) air conditioner. The VRF air conditioner comprises an outdoor unit and a plurality of indoor units. An electronic expansion valve is mounted in each indoor unit. The control method includes: when an instruction for turning off all the indoor units of the VRF air conditioner is received, controlling the compressor of the outdoor unit to stop operation, and controlling an optional number of electronic expansion valves in all the indoor units to keep a preset openness; detecting the difference of high pressure and low pressure in the compressor, and/or recording the duration of operation stopping; when the detected pressure difference is smaller than or equal to a preset pressure value and/or the duration of operation stopping reaches preset duration, controlling the four-way valve in the outdoor unit to deenergize. By the control method, when all the indoor units of the VRF air conditioner are turned off, air flow impact noise can be avoided while air conditioner energy consumption can be lowered under the premise that the difference of the high pressure and the low pressure in the compressor is balanced.
Description
Technical field
The present invention relates to air-conditioner technical field, in particular to a kind of control method of multi-gang air-conditioner device and a kind of control system of multi-gang air-conditioner device.
Background technology
At present, in correlation technique, under heating mode, close all indoor sets for multi-gang air-conditioner device and mainly contain following two kinds of control programs:
Scheme one: under heating mode, close all indoor sets, when outdoor function is required to be 0 (being that compressor of outdoor unit quits work), the power-off immediately of off-premises station cross valve;
Scheme two: close all indoor sets under heating mode, outdoor function is required to be at 0 o'clock, and off-premises station cross valve keeps "on" position always.
But, in scheme one, in the time that outdoor function is required to be 0, due to cross valve power-off immediately, high-low pressure moment conversion in compressor, can produce very significantly gas shock noise at indoor set, have a strong impact on user's comfort, particularly, be illustrated in figure 1 the Time Domain Spectrum of air-conditioner noise of indoor unit in the time of holding state, produce stronger noise at A point.And in scheme two, because off-premises station cross valve keeps energising always, switch although can eliminate cross valve moment the gas shock noise producing, but because the high-low pressure pressure reduction in compressor cannot balance, cause compressor start load large, and cross valve is switched on always and also can be caused the waste of the energy.
Therefore, how, in the time that all indoor sets of multi-gang air-conditioner device are closed, can guarantee, under the prerequisite of balance compressor high-low pressure pressure reduction, to avoid producing gas shock noise, and the energy consumption that reduces air-conditioner becomes technical problem urgently to be resolved hurrily.
Summary of the invention
The present invention is intended at least solve one of technical problem existing in prior art or correlation technique.
For this reason, one object of the present invention has been to propose a kind of all indoor sets at multi-gang air-conditioner device while closing, can, guaranteeing, under the prerequisite of high-low pressure pressure reduction in balance compressor, to avoid producing gas shock noise, reduce the control method of the multi-gang air-conditioner device of air-conditioner energy consumption simultaneously.
Another object of the present invention is that correspondence has proposed a kind of control system of multi-gang air-conditioner device.
For achieving the above object, embodiment according to a first aspect of the invention, a kind of control method of multi-gang air-conditioner device has been proposed, described multi-gang air-conditioner device comprises an off-premises station and multiple indoor set, in each indoor set in described multiple indoor set, electric expansion valve is installed, described electric expansion valve is arranged between the heat exchanger and described outdoor unit heat exchanger of described each indoor set, the control method of described multi-gang air-conditioner device, comprise: in the time receiving the instruction of all indoor sets of closing described multi-gang air-conditioner device, the compressor of controlling in described off-premises station quits work, and the electric expansion valve of controlling in the indoor set of any amount in described all indoor sets keeps predetermined aperture, detect the high-low pressure pressure reduction in described compressor, and/or record the out-of-work duration of described compressor, detecting that described high-low pressure pressure reduction is less than or equal to scheduled pressure value, and/or in the time that the out-of-work duration of described compressor reaches scheduled duration, controlling the cross valve power-off in described off-premises station.
The control method of multi-gang air-conditioner device according to an embodiment of the invention, by in the time receiving the instruction of all indoor sets of closing multi-gang air-conditioner device, control compressor quits work, and the electric expansion valve of controlling the indoor set of any amount in indoor set keeps predetermined aperture, make it possible to the high-low pressure pressure reduction of balance compressor, and by detecting that the high-low pressure pressure reduction in compressor is less than or equal to scheduled pressure value, and/or in the time that the duration of compressor shutdown time reaches scheduled duration, control the cross valve power-off in off-premises station, make it possible to guarantee that high-low pressure pressure reduction in compressor is in predetermined less scope, the load again starting to reduce compressor, can avoid directly controlling cross valve power-off in the time that all indoor sets quit work and produce gas shock noise simultaneously, be conducive to improve user's comfort, also avoided cross valve to increase the energy consumption of air-conditioner in "on" position always.
Wherein, the indoor set of any amount can be one or more indoor sets of finally closing, and can be also the indoor set of not working before.
In addition, the control method of multi-gang air-conditioner device according to the above embodiment of the present invention, can also have following additional technical characterictic:
According to one embodiment of present invention, controlling before described compressor quits work and control the step that described electric expansion valve keeps predetermined aperture, also comprise: the mode of operation of obtaining described multi-gang air-conditioner device; And in the time that described multi-gang air-conditioner device is operated in heating mode, carries out and control described compressor and quit work and control the step that described electric expansion valve keeps predetermined aperture.
According to one embodiment of present invention, described scheduled pressure value is between 0MPa to 0.5MPa.Preferably, scheduled pressure value is between 0.1MPa to 0.3MPa.
According to one embodiment of present invention, described scheduled duration is between 3 minutes to 6 minutes.Preferably, scheduled duration can be between 5 minutes to 6 minutes.
According to one embodiment of present invention, detecting that described high-low pressure pressure reduction is less than or equal to scheduled pressure value, and/or in the time that the out-of-work duration of described compressor reaches scheduled duration, also comprising: the electric expansion valve of controlling in described all indoor sets is being closed.Certainly, the electric expansion valve in indoor set also can stay open always.
According to a second aspect of the invention, a kind of control system of multi-gang air-conditioner device has also been proposed, described multi-gang air-conditioner device comprises an off-premises station and multiple indoor set, in each indoor set in described multiple indoor set, electric expansion valve is installed, described electric expansion valve is arranged between the heat exchanger and described outdoor unit heat exchanger of described each indoor set, the control system of described multi-gang air-conditioner device, comprise: control module, for in the time receiving the instruction of all indoor sets of closing described multi-gang air-conditioner device, the compressor of controlling in described off-premises station quits work, and the electric expansion valve of controlling in the indoor set of any amount in described all indoor sets keeps predetermined aperture, and high-low pressure pressure reduction in detecting unit detects described compressor is less than or equal to scheduled pressure value, and/or the out-of-work duration of described compressor of recording unit records is while reaching scheduled duration, control the cross valve power-off in described off-premises station, described detecting unit, for detection of the high-low pressure pressure reduction in described compressor, described record cell, for recording the out-of-work duration of described compressor.
The control system of multi-gang air-conditioner device according to an embodiment of the invention, by in the time receiving the instruction of all indoor sets of closing multi-gang air-conditioner device, control compressor quits work, and the electric expansion valve of controlling the indoor set of any amount in indoor set keeps predetermined aperture, make it possible to the high-low pressure pressure reduction of balance compressor, and by detecting that the high-low pressure pressure reduction in compressor is less than or equal to scheduled pressure value, and/or in the time that the duration of compressor shutdown time reaches scheduled duration, control the cross valve power-off in off-premises station, make it possible to guarantee that high-low pressure pressure reduction in compressor is in predetermined less scope, the load again starting to reduce compressor, can avoid directly controlling cross valve power-off in the time that all indoor sets quit work and produce gas shock noise simultaneously, be conducive to improve user's comfort, also avoided cross valve to increase the energy consumption of air-conditioner in "on" position always.
Wherein, the indoor set of any amount can be one or more indoor sets of finally closing, and can be also the indoor set of not working before.
According to one embodiment of present invention, also comprise: acquiring unit, for obtaining the mode of operation of described multi-gang air-conditioner device; Described control module specifically for, in the time that described acquiring unit gets described multi-gang air-conditioner device and is operated in heating mode, control described compressor and quit work and control described electric expansion valve and keep predetermined aperture.
According to one embodiment of present invention, described scheduled pressure value is between 0MPa to 0.5MPa.Preferably, scheduled pressure value is between 0.1MPa to 0.3MPa.
According to one embodiment of present invention, described scheduled duration is between 3 minutes to 6 minutes.Preferably, scheduled duration can be between 5 minutes to 6 minutes.
According to one embodiment of present invention, described control module also for: the high-low pressure pressure reduction in described detecting unit detects described compressor is less than or equal to scheduled pressure value, and/or the out-of-work duration of described compressor of described recording unit records is while reaching scheduled duration, the electric expansion valve of controlling in described all indoor sets is closed.Certainly, the electric expansion valve in indoor set also can stay open always.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Brief description of the drawings
Above-mentioned and/or additional aspect of the present invention and advantage accompanying drawing below combination is understood becoming the description of embodiment obviously and easily, wherein:
Fig. 1 shows the Time Domain Spectrum schematic diagram of multi-gang air-conditioner device noise of indoor unit in the time shutting down in correlation technique;
Fig. 2 shows the schematic flow diagram of the control method of multi-gang air-conditioner device according to an embodiment of the invention;
Fig. 3 shows the Time Domain Spectrum schematic diagram of multi-gang air-conditioner device noise of indoor unit in the time shutting down according to an embodiment of the invention;
Fig. 4 shows the schematic flow diagram of the control method of multi-gang air-conditioner device according to another embodiment of the invention;
Fig. 5 shows the schematic block diagram of the control system of multi-gang air-conditioner device according to an embodiment of the invention.
Detailed description of the invention
In order more clearly to understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail.It should be noted that, in the situation that not conflicting, the feature in the application's embodiment and embodiment can combine mutually.
A lot of details are set forth in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from other modes described here and implement, and therefore, protection scope of the present invention is not subject to the restriction of following public specific embodiment.
Wherein, gang air-conditioner devices many described in embodiments of the invention comprise an off-premises station and multiple indoor set, in each indoor set in described multiple indoor set, electric expansion valve is installed, described electric expansion valve is arranged between the heat exchanger and described outdoor unit heat exchanger of described each indoor set.
Fig. 2 shows the schematic flow diagram of the control method of multi-gang air-conditioner device according to an embodiment of the invention.
As shown in Figure 2, the control method of multi-gang air-conditioner device according to an embodiment of the invention, comprise: step 202, in the time receiving the instruction of all indoor sets of closing described multi-gang air-conditioner device, the compressor of controlling in described off-premises station quits work, and the electric expansion valve of controlling in the indoor set of any amount in described all indoor sets keeps predetermined aperture; Step 204, detects the high-low pressure pressure reduction in described compressor, and/or records the out-of-work duration of described compressor; Step 206, is detecting that described high-low pressure pressure reduction is less than or equal to scheduled pressure value, and/or in the time that the out-of-work duration of described compressor reaches scheduled duration, is controlling the cross valve power-off in described off-premises station.
By in the time receiving the instruction of all indoor sets of closing multi-gang air-conditioner device, control compressor quits work, and the electric expansion valve of controlling the indoor set of any amount in indoor set keeps predetermined aperture, make it possible to the high-low pressure pressure reduction of balance compressor, and by detecting that the high-low pressure pressure reduction in compressor is less than or equal to scheduled pressure value, and/or in the time that the duration of compressor shutdown time reaches scheduled duration, control the cross valve power-off in off-premises station, make it possible to guarantee that high-low pressure pressure reduction in compressor is in predetermined less scope, the load again starting to reduce compressor, can avoid directly controlling cross valve power-off in the time that all indoor sets quit work and produce gas shock noise (not having as shown in Figure 3 the gas shock noise of sudden change in Time Domain Spectrum) simultaneously, be conducive to improve user's comfort, also avoided cross valve to increase the energy consumption of air-conditioner in "on" position always.Wherein, the indoor set of any amount can be one or more indoor sets of finally closing, and can be also the indoor set of not working before.
In addition, the control method of multi-gang air-conditioner device according to the above embodiment of the present invention, can also have following additional technical characterictic:
According to one embodiment of present invention, controlling before described compressor quits work and control the step that described electric expansion valve keeps predetermined aperture, also comprise: the mode of operation of obtaining described multi-gang air-conditioner device; And in the time that described multi-gang air-conditioner device is operated in heating mode, carries out and control described compressor and quit work and control the step that described electric expansion valve keeps predetermined aperture.
According to one embodiment of present invention, described scheduled pressure value is between 0MPa to 0.5MPa.Preferably, scheduled pressure value is between 0.1MPa to 0.3MPa.
According to one embodiment of present invention, described scheduled duration is between 3 minutes to 6 minutes.Preferably, scheduled duration can be between 5 minutes to 6 minutes.
According to one embodiment of present invention, detecting that described high-low pressure pressure reduction is less than or equal to scheduled pressure value, and/or in the time that the out-of-work duration of described compressor reaches scheduled duration, also comprising: the electric expansion valve of controlling in described all indoor sets is being closed.Certainly, the electric expansion valve in indoor set also can stay open always.
Above specifically can be as shown in Figure 4 to the control flow of multi-gang air-conditioner device.
Fig. 4 shows the schematic flow diagram of the control method of multi-gang air-conditioner device according to another embodiment of the invention.
As shown in Figure 4, the control method of multi-gang air-conditioner device according to another embodiment of the invention, comprising:
Step 402, the indoor set of last operation receives shutdown command, closes all indoor sets of multi-gang air-conditioner device.
Step 404, off-premises station cross valve keeps "on" position, indoor set electric expansion valve to keep certain aperture.
Step 406, judges whether be more than or equal to 5 minutes the downtime whether high-low pressure pressure reduction in compressor is less than or equal to 0.2MPa or compressor, if so, performs step 408; Otherwise, return to step 404.
Step 408, judging that while downtime that high-low pressure pressure reduction in compressor is less than or equal to 0.2MPa and/or compressor being more than or equal to 5 minutes, in control room, organic electronic expansion valve cuts out.
Step 410, controls the power-off of off-premises station cross valve.
Fig. 5 shows the schematic block diagram of the control system of multi-gang air-conditioner device according to an embodiment of the invention.
As shown in Figure 5, the control system 500 of multi-gang air-conditioner device according to an embodiment of the invention, described multi-gang air-conditioner device comprises an off-premises station and multiple indoor set, in each indoor set in described multiple indoor set, electric expansion valve is installed, described electric expansion valve is arranged between the heat exchanger and described outdoor unit heat exchanger of described each indoor set, the control system 500 of described multi-gang air-conditioner device, comprise: control module 502, for in the time receiving the instruction of all indoor sets of closing described multi-gang air-conditioner device, the compressor of controlling in described off-premises station quits work, and the electric expansion valve of controlling in the indoor set of any amount in described all indoor sets keeps predetermined aperture, and high-low pressure pressure reduction in detecting unit 504 detects described compressor is less than or equal to scheduled pressure value, and/or the out-of-work duration of described compressor that records of record cell 506 is while reaching scheduled duration, control the cross valve power-off in described off-premises station, described detecting unit 504, for detection of the high-low pressure pressure reduction in described compressor, described record cell 506, for recording the out-of-work duration of described compressor.
By in the time receiving the instruction of all indoor sets of closing multi-gang air-conditioner device, control compressor quits work, and the electric expansion valve of controlling the indoor set of any amount in indoor set keeps predetermined aperture, make it possible to the high-low pressure pressure reduction of balance compressor, and by detecting that the high-low pressure pressure reduction in compressor is less than or equal to scheduled pressure value, and/or in the time that the duration of compressor shutdown time reaches scheduled duration, control the cross valve power-off in off-premises station, make it possible to guarantee that high-low pressure pressure reduction in compressor is in predetermined less scope, the load again starting to reduce compressor, can avoid directly controlling cross valve power-off in the time that all indoor sets quit work and produce gas shock noise simultaneously, be conducive to improve user's comfort, also avoided cross valve to increase the energy consumption of air-conditioner in "on" position always.
Wherein, the indoor set of any amount can be one or more indoor sets of finally closing, and can be also the indoor set of not working before.
According to one embodiment of present invention, also comprise: acquiring unit 508, for obtaining the mode of operation of described multi-gang air-conditioner device; Described control module 502 specifically for, in the time that described acquiring unit 508 gets described multi-gang air-conditioner device and is operated in heating mode, control described compressor and quit work and control described electric expansion valve and keep predetermined aperture.
According to one embodiment of present invention, described scheduled pressure value is between 0MPa to 0.5MPa.Preferably, scheduled pressure value is between 0.1MPa to 0.3MPa.
According to one embodiment of present invention, described scheduled duration is between 3 minutes to 6 minutes.Preferably, scheduled duration can be between 5 minutes to 6 minutes.
According to one embodiment of present invention, described control module 502 also for: detect that at described detecting unit 504 the high-low pressure pressure reduction in described compressor is less than or equal to scheduled pressure value, and/or the out-of-work duration of described compressor that records of described record cell 506 is while reaching scheduled duration, the electric expansion valve of controlling in described all indoor sets is closed.Certainly, the electric expansion valve in indoor set also can stay open always.
More than be described with reference to the accompanying drawings technical scheme of the present invention, the present invention proposes a kind of control program of new multi-gang air-conditioner device, can be in the time that all indoor sets of multi-gang air-conditioner device be closed, can be guaranteeing under the prerequisite of high-low pressure pressure reduction in balance compressor, avoid producing gas shock noise, reduce air-conditioner energy consumption simultaneously.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. the control method of a multi-gang air-conditioner device, described multi-gang air-conditioner device comprises an off-premises station and multiple indoor set, in each indoor set in described multiple indoor set, electric expansion valve is installed, described electric expansion valve is arranged between the heat exchanger and described outdoor unit heat exchanger of described each indoor set, it is characterized in that, comprising:
In the time receiving the instruction of all indoor sets of closing described multi-gang air-conditioner device, the compressor of controlling in described off-premises station quits work, and the electric expansion valve of controlling in the indoor set of any amount in described all indoor sets keeps predetermined aperture;
Detect the high-low pressure pressure reduction in described compressor, and/or record the out-of-work duration of described compressor;
Detecting that described high-low pressure pressure reduction is less than or equal to scheduled pressure value, and/or in the time that the out-of-work duration of described compressor reaches scheduled duration, controlling the cross valve power-off in described off-premises station.
2. the control method of multi-gang air-conditioner device according to claim 1, is characterized in that, is controlling before described compressor quits work and control the step that described electric expansion valve keeps predetermined aperture, also comprises:
Obtain the mode of operation of described multi-gang air-conditioner device; And
In the time that described multi-gang air-conditioner device is operated in heating mode, carries out and control described compressor and quit work and control the step that described electric expansion valve keeps predetermined aperture.
3. the control method of multi-gang air-conditioner device according to claim 1, is characterized in that, described scheduled pressure value is between 0MPa to 0.5MPa.
4. the control method of multi-gang air-conditioner device according to claim 1, is characterized in that, described scheduled duration is between 3 minutes to 6 minutes.
5. according to the control method of the multi-gang air-conditioner device described in any one in claim 1 to 4, it is characterized in that, detecting that described high-low pressure pressure reduction is less than or equal to scheduled pressure value, and/or in the time that the out-of-work duration of described compressor reaches scheduled duration, also comprising:
The electric expansion valve of controlling in described all indoor sets is closed.
6. the control system of a multi-gang air-conditioner device, described multi-gang air-conditioner device comprises an off-premises station and multiple indoor set, in each indoor set in described multiple indoor set, electric expansion valve is installed, described electric expansion valve is arranged between the heat exchanger and described outdoor unit heat exchanger of described each indoor set, it is characterized in that, comprising:
Control module, for in the time receiving the instruction of all indoor sets of closing described multi-gang air-conditioner device, the compressor of controlling in described off-premises station quits work, and the electric expansion valve of controlling in the indoor set of any amount in described all indoor sets keeps predetermined aperture, and
High-low pressure pressure reduction in detecting unit detects described compressor is less than or equal to scheduled pressure value, and/or the out-of-work duration of described compressor of recording unit records is while reaching scheduled duration, controls the cross valve power-off in described off-premises station;
Described detecting unit, for detection of the high-low pressure pressure reduction in described compressor;
Described record cell, for recording the out-of-work duration of described compressor.
7. the control system of multi-gang air-conditioner device according to claim 6, is characterized in that, also comprises:
Acquiring unit, for obtaining the mode of operation of described multi-gang air-conditioner device;
Described control module specifically for, in the time that described acquiring unit gets described multi-gang air-conditioner device and is operated in heating mode, control described compressor and quit work and control described electric expansion valve and keep predetermined aperture.
8. the control system of multi-gang air-conditioner device according to claim 6, is characterized in that, described scheduled pressure value is between 0MPa to 0.5MPa.
9. the control system of multi-gang air-conditioner device according to claim 6, is characterized in that, described scheduled duration is between 3 minutes to 6 minutes.
10. according to the control system of the multi-gang air-conditioner device described in any one in claim 6 to 9, it is characterized in that, described control module also for:
High-low pressure pressure reduction in described detecting unit detects described compressor is less than or equal to scheduled pressure value, and/or the out-of-work duration of described compressor of described recording unit records is while reaching scheduled duration, the electric expansion valve of controlling in described all indoor sets is closed.
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| CN201410320620.3A CN104101054B (en) | 2014-07-07 | 2014-07-07 | Control method and system of variable refrigerant flow (VRF) air conditioner |
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| CN201410320620.3A CN104101054B (en) | 2014-07-07 | 2014-07-07 | Control method and system of variable refrigerant flow (VRF) air conditioner |
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