CN107543288A - Air-conditioning system, the control method of air-conditioning system and device - Google Patents
Air-conditioning system, the control method of air-conditioning system and device Download PDFInfo
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Abstract
The invention discloses a kind of air-conditioning system, the control method of air-conditioning system and device, method includes the temperature for when controlling air-conditioning system to be run with heating mode, obtaining the outdoor heat exchanger of air-conditioning system；When the temperature of outdoor heat exchanger is less than or equal to zero, the temperature of indoor heat exchanger and the return air temperature of indoor set are obtained, and obtain the temperature difference between the temperature of indoor heat exchanger and the return air temperature of indoor set；Judge whether the temperature of indoor heat exchanger is more than or equal to whether the first preset temperature and temperature difference are more than or equal to the second preset temperature；If the temperature of indoor heat exchanger is more than or equal to the first preset temperature and temperature difference is more than or equal to the second preset temperature, control air-conditioning system enters frequency reducing control model.On the premise of ensuring the comfortableness of user in the air blow and return temperature difference for ensureing air-conditioning system, extend the defrost cycle, ensure the stationarity of wind pushing temperature, improve the efficiency of system, reduce the energy consumption of system, realize Energy Saving Control, lift the experience of user.
Description
Technical field
The present invention relates to air conditioner technical field, more particularly to a kind of control method of air-conditioning system, a kind of non-transitory
Computer-readable recording medium, a kind of control device of air-conditioning system and a kind of air-conditioning system.
Background technology
In correlation technique, connected air conditioner system is widely used in the heating operations of lower temperature environments.But
The problem of correlation technique is present be, the easy frosting of air-conditioning system outdoor heat exchanger in heating operations is caused, it is necessary to often defrost
Air conditioner heat-production efficiency reduces, and increases energy consumption.
The content of the invention
It is contemplated that at least solves one of technical problem in correlation technique to a certain extent.Therefore, the present invention
First purpose be to propose a kind of control method of air-conditioning system, can ensure the comfortableness of air-conditioning system, while reduce energy
Consumption.
Second purpose of the invention is to propose a kind of non-transitorycomputer readable storage medium.
3rd purpose of the invention is to propose a kind of control device of air-conditioning system.
4th purpose of the invention is to propose a kind of air-conditioning system.
To reach above-mentioned purpose, first aspect present invention embodiment proposes a kind of control method of air-conditioning system, including
Following steps：When controlling the air-conditioning system to be run with heating mode, the temperature of the outdoor heat exchanger of the air-conditioning system is obtained
Degree；When the temperature of the outdoor heat exchanger is less than or equal to zero, the temperature of indoor heat exchanger and the return air temperature of indoor set are obtained
Degree, and obtain the temperature difference between the temperature of the indoor heat exchanger and the return air temperature of the indoor set；Judge the interior
The temperature of heat exchanger whether is more than or equal to the first preset temperature and whether the temperature difference is more than or equal to the second preset temperature；
If the temperature of the indoor heat exchanger is more than or equal to first preset temperature and the temperature difference is more than or equal to described
Second preset temperature, then the air-conditioning system is controlled to enter frequency reducing control model.
The control method of the air-conditioning system proposed according to embodiments of the present invention, when air-conditioning system is heated, obtain empty
The temperature of the outdoor heat exchanger of adjusting system, when the temperature of outdoor heat exchanger is less than or equal to zero, obtain the temperature of indoor heat exchanger
The return air temperature of degree and indoor set, and the temperature difference between the temperature of indoor heat exchanger and the return air temperature of indoor set is obtained, so
Judge whether the temperature of indoor heat exchanger is more than or equal to the first preset temperature and temperature difference whether to be more than or equal to second pre- afterwards
If temperature, if the temperature of indoor heat exchanger is more than or equal to the first preset temperature and temperature difference is more than or equal to the second default temperature
Degree, then air-conditioning system is controlled to enter frequency redution mode.Thus, the control method of the embodiment of the present invention can ensure air-conditioning system
The air blow and return temperature difference, it is ensured that on the premise of the comfortableness of user, by carrying out frequency reducing control to air-conditioning system, extend defrost week
Phase, ensure the stationarity of wind pushing temperature, while improve the efficiency of system, reduce the energy consumption of system, realize Energy Saving Control,
Lift the experience of user.
According to one embodiment of present invention, after controlling the air-conditioning system to enter the frequency reducing control model, institute
The method of stating can also include：Controlling the running frequency of the compressor of the air-conditioning system reduces predeterminated frequency, and every preset time
Whether the temperature and the temperature difference for judging the indoor heat exchanger meet exit criteria；If the temperature of the indoor heat exchanger
Meet the exit criteria with the temperature difference, then control the air-conditioning system to exit the frequency reducing control model.
According to one embodiment of present invention, if the temperature of the indoor heat exchanger and the temperature difference be unsatisfactory for it is described
Exit criteria, then judge whether the temperature of the outdoor heat exchanger is less than or equal to zero；If the temperature of the outdoor heat exchanger
Less than or equal to zero, then the running frequency of the compressor is controlled to continue to reduce the predeterminated frequency；If the outdoor heat exchange
The temperature of device is more than zero, then controls the running frequency of the compressor to keep constant.
According to one embodiment of present invention, the exit criteria may include：The temperature of the indoor heat exchanger is less than institute
State the difference of the first preset temperature and the first predetermined threshold value or the temperature difference is less than second preset temperature and the second default threshold
The difference of value, wherein, first predetermined threshold value and second predetermined threshold value are all higher than zero.
According to one embodiment of present invention, first preset temperature can be 38 DEG C, and second preset temperature can be
15 DEG C, first predetermined threshold value and second predetermined threshold value can be 2 DEG C.
To reach above-mentioned purpose, second aspect of the present invention embodiment proposes a kind of non-transitory computer-readable storage medium
Matter, computer program is stored thereon with, the control method of described air-conditioning system is realized when the program is executed by processor.
The non-transitorycomputer readable storage medium proposed according to embodiments of the present invention, by the control for performing air-conditioning system
Method processed, the air blow and return temperature difference of air-conditioning system can ensured, it is ensured that on the premise of the comfortableness of user, extend the defrost cycle,
Ensure the stationarity of wind pushing temperature, while improve the efficiency of system, reduce the energy consumption of system, realize Energy Saving Control, lift user
Experience.To reach above-mentioned purpose, third aspect present invention embodiment proposes a kind of control device of air-conditioning system, including：
The first temperature detecting unit of the outdoor heat exchanger of the air-conditioning system is arranged at, first temperature detecting unit is used to detect
The temperature of the outdoor heat exchanger；It is arranged at the second temperature detection unit of the indoor heat exchanger of the air-conditioning system, described
Two temperature detecting units are used for the temperature for detecting the indoor heat exchanger；It is arranged at the return air inlet of the indoor set of the air-conditioning system
The 3rd temperature detecting unit, the 3rd temperature detecting unit is used to detect the return air temperature of the indoor set；Control unit,
Described control unit respectively with first temperature detecting unit, the second temperature detection unit and the 3rd temperature detection
Unit is connected, and described control unit is used to control the air-conditioning system to run with heating mode, and in the outdoor heat exchanger
When temperature is less than or equal to zero, the temperature between the temperature of the indoor heat exchanger and the return air temperature of the indoor set is obtained
Difference, and judge the indoor heat exchanger temperature whether be more than or equal to the first preset temperature and the temperature difference whether be more than or
It is more than or equal to first preset temperature and the temperature equal to the second preset temperature, and in the temperature of the indoor heat exchanger
When degree difference is more than or equal to second preset temperature, the air-conditioning system is controlled to enter frequency reducing control model.
The control device of the air-conditioning system proposed according to embodiments of the present invention, control unit control air-conditioning system to heat mould
When formula is run, the temperature of outdoor heat exchanger, second temperature detection unit sensing chamber are detected by obtaining the first temperature detecting unit
The return air temperature of the temperature of interior heat exchanger and the 3rd temperature detecting unit detection indoor set, and be less than in the temperature of outdoor heat exchanger
Or during equal to zero, the temperature difference between the temperature of indoor heat exchanger and the return air temperature of indoor set is obtained, and judge indoor heat exchange
The temperature of device whether is more than or equal to the first preset temperature and whether temperature difference is more than or equal to the second preset temperature, and in room
When the temperature of interior heat exchanger is more than or equal to the first preset temperature and temperature difference and is more than or equal to the second preset temperature, control air-conditioning
System enters frequency redution mode.Thus, the control device of the embodiment of the present invention can ensure the air blow and return temperature difference of air-conditioning system, really
On the premise of the comfortableness at family of guaranteeing, by carrying out frequency reducing control to air-conditioning system, the defrost cycle is extended, ensures wind pushing temperature
Stationarity, while improve the efficiency of system, reduce the energy consumption of system, realize Energy Saving Control, lift the experience of user.
According to one embodiment of present invention, after controlling the air-conditioning system to enter the frequency reducing control model, the control is single
Member can be additionally used in, and controls the running frequency of the compressor of the air-conditioning system and reduces predeterminated frequency, and judges every preset time
Whether the temperature of the indoor heat exchanger and the temperature difference meet exit criteria, and the indoor heat exchanger temperature and
When the temperature difference meets the exit criteria, the air-conditioning system is controlled to exit the frequency reducing control model.
According to one embodiment of present invention, described control unit can be additionally used in, the indoor heat exchanger temperature and
When the temperature difference is unsatisfactory for the exit criteria, whether the temperature of the outdoor heat exchanger is judged less than or equal to zero, and
When the temperature of the outdoor heat exchanger is less than or equal to zero, the running frequency of the compressor is controlled to continue to reduce the default frequency
Rate, and when the temperature of the outdoor heat exchanger is more than zero, control the running frequency of the compressor to keep constant.
According to one embodiment of present invention, the exit criteria may include：The temperature of the indoor heat exchanger is less than institute
State the difference of the first preset temperature and the first predetermined threshold value or the temperature difference is less than second preset temperature and the second default threshold
The difference of value, wherein, first predetermined threshold value and second predetermined threshold value are all higher than zero.
According to one embodiment of present invention, first preset temperature can be 38 DEG C, and second preset temperature can be
15 DEG C, first predetermined threshold value and second predetermined threshold value can be 2 DEG C.
To reach above-mentioned purpose, fourth aspect present invention embodiment proposes a kind of air-conditioning system, including described air-conditioning
The control device of system.
The air-conditioning system proposed according to embodiments of the present invention, by the control device of air-conditioning system, air-conditioning can ensured
The air blow and return temperature difference of system, it is ensured that on the premise of the comfortableness of user, extend the defrost cycle, ensure the stationarity of wind pushing temperature,
The efficiency of system is improved simultaneously, is reduced the energy consumption of system, is realized Energy Saving Control, lifts the experience of user.
Brief description of the drawings
Fig. 1 is the flow chart of the control method of air-conditioning system according to embodiments of the present invention；
Fig. 2 is the structural representation of air-conditioning system according to an embodiment of the invention；
Fig. 3 is the flow chart of the control method of air-conditioning system according to an embodiment of the invention；
Fig. 4 is the flow chart of the control method of air-conditioning system in accordance with another embodiment of the present invention；
Fig. 5 is the flow chart according to the control method of the air-conditioning system of a specific embodiment of the invention；
Fig. 6 is the block diagram of the control device of air-conditioning system according to embodiments of the present invention；And
Fig. 7 is the block diagram of air-conditioning system according to embodiments of the present invention.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings describe the control method of the air-conditioning system of the embodiment of the present invention, the control device of air-conditioning system with
And air-conditioning system.
Fig. 1 is the flow chart of the control method of air-conditioning system according to embodiments of the present invention.Wherein, air-conditioning system includes room
Outer machine and multiple indoor sets, outdoor unit include more frequency-changeable compressors in parallel, and air-conditioning system can be connected air conditioner system
System.For example, as shown in Fig. 2 outdoor unit includes two frequency-changeable compressors (i.e. the first frequency-changeable compressor and the second frequency-changeable compressor),
Specifically, multiple compressors can be connected in parallel, and the exhaust outlet of multiple compressors is connected to be connected with the first end of four-way valve afterwards, four-way
Second end of valve is connected with outdoor heat exchanger, outdoor throttle part and high-pressure stop valve successively, and high-pressure stop valve also changes with interior
The first end of hot device is connected, and the gas returning port of multiple compressors is connected to be connected with the first end of low-pressure tank afterwards, the other end of low-pressure tank
It is connected with the 3rd end of four-way valve, the 4th end of four-way valve is connected with one end of low-pressure shutoff valve, the other end of low-pressure shutoff valve
It is connected with the second end of indoor heat exchanger.
As shown in figure 1, the control method of the air-conditioning system of the embodiment of the present invention comprises the following steps：
S1：When controlling air-conditioning system to be run with heating mode, the temperature of the outdoor heat exchanger of air-conditioning system is obtained.
According to one embodiment of present invention, the temperature of outdoor heat exchanger, tool can be detected by the first temperature detecting unit
Body, the first temperature detecting unit may be provided at the internal or external of outdoor heat exchanger.
S2：When the temperature of outdoor heat exchanger is less than or equal to zero, the temperature of indoor heat exchanger and returning for indoor set are obtained
Air temperature, and obtain the temperature difference between the temperature of indoor heat exchanger and the return air temperature of indoor set.
According to one embodiment of present invention, the temperature of indoor heat exchanger can be detected by second temperature detection unit, and
The return air temperature of indoor set can be detected by the 3rd temperature detecting unit, specifically, second temperature detection unit may be provided at room
Interior heat exchanger it is internal or external, the 3rd temperature detecting unit may be provided at the return air inlet of indoor set.Wherein, the second temperature can be passed through
The temperature Tb of the indoor heat exchanger of degree detection unit detection subtracts the return air temperature of the indoor set of the 3rd temperature detecting unit detection
Tc, to obtain the temperature difference Tb-Tc between the temperature of indoor heat exchanger and the return air temperature of indoor set.
S3：Judge whether the temperature of indoor heat exchanger be more than or wait more than or equal to the first preset temperature and temperature difference
In the second preset temperature.
S4：If the temperature of indoor heat exchanger is more than or equal to the first preset temperature and temperature difference is pre- more than or equal to second
If temperature, then air-conditioning system is controlled to enter frequency reducing control model.
It should be noted that in environment temperature is 0-7 DEG C of heat pump heating operations, the temperature Ta of outdoor heat exchanger can be in
Two kinds of situations higher than 0 DEG C and less than or equal to 0 DEG C, when the temperature Ta of outdoor heat exchanger is less than or equal to 0 DEG C, i.e. Ta≤0
DEG C when, the frosting of outdoor heat exchanger occurs in air-conditioning system after operation a period of time, frosting can seriously reduce the system of air-conditioning system
Heat energy power, or even the comfortableness for causing heat supply by phased manner to reduce user；When the temperature Ta of outdoor heat exchanger is higher than 0 DEG C, i.e.,
During 0 DEG C of Ta ＞, air-conditioning system can longer-term stable operation will not carry out defrost, but need maximized in outdoor heat exchange ability
In the case of carry out appropriate reducing compressor frequency, i.e., the decline that the wind pushing temperature of indoor set can be appropriate.
Based on this, in embodiments of the present invention, after establishing machine by cable in air-conditioning system, when control air-conditioning system is with heating mode
During operation, the temperature of the outdoor heat exchanger of air-conditioning system is obtained, when the temperature of outdoor heat exchanger is less than or equal to zero, obtains room
The temperature of interior heat exchanger and the return air temperature of indoor set, and obtain between the temperature of indoor heat exchanger and the return air temperature of indoor set
Temperature difference, then judge indoor heat exchanger temperature whether be more than or equal to the first preset temperature and temperature difference whether be more than or
Equal to the second preset temperature；If the temperature of indoor heat exchanger is more than or equal to the first preset temperature and temperature difference is more than or equal to
Second preset temperature, then control air-conditioning system to enter frequency reducing control model, preset if the temperature of indoor heat exchanger is less than first
Temperature or temperature difference are less than the second preset temperature, then continue heating mode, and continue to obtain temperature and the interior of indoor heat exchanger
The return air temperature and temperature difference of machine.
Thus, the control method of the embodiment of the present invention can ensure the air blow and return temperature difference of air-conditioning system, it is ensured that user's
On the premise of comfortableness, by carrying out frequency reducing control to air-conditioning system, the defrost cycle is extended, ensures the steady of wind pushing temperature
Property, while the efficiency of system is improved, the energy consumption of system is reduced, realizes Energy Saving Control, lifts the experience of user.
According to one embodiment of present invention, as shown in figure 3, after control air-conditioning system enters frequency reducing control model,
Method can also include：
S101：Controlling the running frequency of the compressor of air-conditioning system reduces predeterminated frequency, and judges room every preset time
Whether the temperature and temperature difference of interior heat exchanger meet exit criteria.
S102：If the temperature and temperature difference of indoor heat exchanger meet exit criteria, control air-conditioning system exits frequency reducing
Control model.
Further, as shown in figure 4, the control method of the air-conditioning system of the embodiment of the present invention also includes：
S201：If the temperature and temperature difference of indoor heat exchanger are unsatisfactory for exit criteria, the temperature of outdoor heat exchanger is judged
Whether degree is less than or equal to zero.
S202：If the temperature of outdoor heat exchanger is less than or equal to zero, the running frequency of control compressor continues to reduce
Predeterminated frequency.
S203：If the temperature of outdoor heat exchanger is more than zero, the running frequency of control compressor keeps constant.
Specifically, after control air-conditioning system enters frequency reducing control model, the compression of air-conditioning system can be controlled first
The running frequency of machine reduces predeterminated frequency, wherein, predeterminated frequency Δ F can be 8Hz, then every preset time Δ T, wherein, in advance
If time Δ T can be 3 minutes, the temperature Tb and temperature difference Tb-Tc of indoor heat exchanger are obtained, and judge the temperature of indoor heat exchanger
Whether Tb and temperature difference Tb-Tc meet exit criteria, if the temperature Tb and temperature difference Tb-Tc of indoor heat exchanger meet to exit bar
Part, then air-conditioning system is controlled to exit frequency reducing control model；If the temperature Tb and temperature difference Tb-Tc of indoor heat exchanger are unsatisfactory for moving back
Go out condition, then judge whether the temperature Ta of outdoor heat exchanger is less than or equal to zero；If the temperature Ta of outdoor heat exchanger be less than or
Equal to zero, then the running frequency of compressor is controlled to continue to reduce predeterminated frequency；If the temperature Ta of outdoor heat exchanger is more than zero,
The running frequency of compressor is controlled to keep constant.
That is, after the running frequency of the compressor of control air-conditioning system reduces predeterminated frequency, indoor heat exchange is judged
Whether the temperature Tb and temperature difference Tb-Tc of device meet exit criteria, if the temperature Tb and temperature difference Tb-Tc of indoor heat exchanger expire
Sufficient exit criteria, then show that the air-conditioning system after frequency reducing can not meet the comfortableness demand of user, control air-conditioning system exits drop
Frequency control model；If the temperature Tb and temperature difference Tb-Tc of indoor heat exchanger are unsatisfactory for exit criteria, outdoor heat exchanger is judged
If temperature Ta whether be less than or equal to zero outdoor heat exchanger temperature Ta be less than or equal to zero, show air-conditioning system still
Easy frosting, the running frequency of compressor is controlled to continue to reduce predeterminated frequency；If the temperature Ta of outdoor heat exchanger is more than zero,
Show air-conditioning system can stable operation, without defrost, control the running frequency of compressor to keep constant.
According to one embodiment of present invention, exit criteria includes：The temperature of indoor heat exchanger is less than the first preset temperature
And the difference or temperature difference of the first predetermined threshold value are less than the difference of the second preset temperature and the second predetermined threshold value, wherein, the first default threshold
Value and the second predetermined threshold value are all higher than zero.
Specifically, the first preset temperature can be 38 DEG C, and the second preset temperature can be 15 DEG C, the first predetermined threshold value and second pre-
If threshold value can be 2 DEG C.
That is, judging whether the temperature Tb and temperature difference Tb-Tc of indoor heat exchanger meet the condition bag of exit criteria
Include：The temperature Tb of indoor heat exchanger is less than the difference of the first preset temperature and the first predetermined threshold value, such as 36 DEG C of Tb ＜, or temperature
Poor Tb-Tc is less than the difference of the second preset temperature and the second predetermined threshold value, such as 13 DEG C of Tb-Tc ＜.
Specifically, as 36 DEG C of Tb ＜ or 13 DEG C of Tb-Tc ＜, then judge to meet that exit criteria control air-conditioning system exits
Frequency reducing control model；Conversely, then judge be unsatisfactory for exit criteria, now, judge outdoor heat exchanger temperature Ta whether be less than or
Equal to zero, if 0 DEG C of the temperature Ta ＜ of outdoor heat exchanger, the running frequency of control compressor continues to reduce predeterminated frequency；Such as
0 DEG C of the temperature Ta ＞ of fruit outdoor heat exchanger, then the running frequency of compressor is controlled to keep constant.
According to the specific embodiment of the present invention, as shown in figure 5, the controlling party of the air-conditioning system of the embodiment of the present invention
Method, comprise the following steps：
S301：Establish machine in air-conditioning system by cable.
S302：Into normal heating mode.
S303：Judge whether to meet following condition simultaneously：
1. whether the temperature Ta of outdoor heat exchanger is less than or equal to zero；
2. whether the temperature Tb of indoor heat exchanger is more than or equal to 38 DEG C；
3. whether temperature difference Tb-Tc is more than or equal to 15 DEG C.
If meet above three condition simultaneously, step S304 is performed；If asynchronously meet above three condition
When, then return to step S303.
S304：Controlling the frequency of compressor reduces predeterminated frequency Δ F, such as 8Hz.
S305：After being spaced preset time, judge whether the temperature Tb of indoor heat exchanger is less than 36 DEG C, or temperature difference Tb-Tc
Less than 13 DEG C.
If it is, the i.e. temperature Tb of indoor heat exchanger, which is less than 36 DEG C or temperature difference Tb-Tc, is less than 13 DEG C of satisfactions one,
Then return to step S302；If not, the i.e. temperature Tb of indoor heat exchanger is more than or waited more than or equal to 36 DEG C and temperature difference Tb-Tc
In 13 DEG C, then step S306 is performed.
S306：Judge whether the temperature Ta of outdoor heat exchanger is less than or equal to zero.
If it is, return to step S304；If it is not, then perform step S307.
S307：Maintain the operation of current compression unit frequency, and return to step S303.
In summary, the control method of the air-conditioning system proposed according to embodiments of the present invention, is heated in air-conditioning system
When, the temperature of the outdoor heat exchanger of air-conditioning system is obtained, when the temperature of outdoor heat exchanger is less than or equal to zero, interior is obtained and changes
The temperature of hot device and the return air temperature of indoor set, and obtain the temperature between the temperature of indoor heat exchanger and the return air temperature of indoor set
Degree is poor, then judges whether the temperature of indoor heat exchanger be more than or equal to more than or equal to the first preset temperature and temperature difference
Second preset temperature, if the temperature of indoor heat exchanger is more than or equal to the first preset temperature and temperature difference is more than or equal to second
Preset temperature, then air-conditioning system is controlled to enter frequency redution mode.Thus, the control method of the embodiment of the present invention can ensure air-conditioning
The air blow and return temperature difference of system, it is ensured that on the premise of the comfortableness of user, by carrying out frequency reducing control, extending to air-conditioning system
In the white cycle, ensure the stationarity of wind pushing temperature, while improve the efficiency of system, reduce the energy consumption of system, realize energy-conservation
Control, lifts the experience of user.
The embodiment of the present invention also proposed a kind of non-transitorycomputer readable storage medium, when the instruction journey of storage medium
When sequence is executed by processor, the control method of the air-conditioning system of the above embodiment of the present invention is able to carry out.
The non-transitorycomputer readable storage medium proposed according to embodiments of the present invention, by the control for performing air-conditioning system
Method processed, the air blow and return temperature difference of air-conditioning system can ensured, it is ensured that on the premise of the comfortableness of user, extend the defrost cycle,
Ensure the stationarity of wind pushing temperature, while improve the efficiency of system, reduce the energy consumption of system, realize Energy Saving Control, lift user
Experience.
Fig. 6 is the block diagram of the control device of air-conditioning system according to embodiments of the present invention.Wherein, air-conditioning system bag
Outdoor unit and multiple indoor sets are included, outdoor unit includes more frequency-changeable compressors in parallel, and air-conditioning system can be that connected machine is empty
Adjusting system.For example, as shown in Fig. 2 outdoor unit 100 includes two frequency-changeable compressors (i.e. the first frequency-changeable compressor 2 and the second frequency conversions
Compressor 3), specifically, multiple compressors can be connected in parallel, the exhaust outlet connected rear and four-way valve 4 first of multiple compressors
End D is connected, and the second end C of four-way valve 4 is connected with outdoor heat exchanger 5, outdoor throttle part 6 and high-pressure stop valve 7 successively, high pressure
First end of the stop valve 7 also with indoor heat exchanger 9 is connected, connected rear and low-pressure tank 1 the first end of gas returning port of multiple compressors
It is connected, the other end of low-pressure tank 1 connects with the 3rd end S-phase of four-way valve 4, the 4th end E of four-way valve 4 and the one of low-pressure shutoff valve 1
End is connected, and the other end of low-pressure shutoff valve 1 is connected with the second end of indoor heat exchanger 9.
As shown in fig. 6, the control device of the air-conditioning system of the embodiment of the present invention, including：First temperature detecting unit 10,
Two temperature detecting units 20, the 3rd temperature detecting unit 30 and control unit 40.
Wherein, the first temperature detecting unit 10 is arranged at the outdoor heat exchanger 5 of air-conditioning system for detecting outdoor heat exchanger 5
Temperature, the indoor heat exchanger 9 that second temperature detection unit 20 is arranged at air-conditioning system is used to detect the temperature of indoor heat exchanger 9
Degree, the return air inlet that the 3rd temperature detecting unit 30 is arranged at the indoor set 200 of air-conditioning system are used for the return air for detecting indoor set 200
Temperature, control unit 40 respectively with the first temperature detecting unit 10, the temperature detecting unit of second temperature detection unit 20 and the 3rd
30 are connected, and control unit 40 is used to control air-conditioning system to run with heating mode, and is less than or waits in the temperature of outdoor heat exchanger 5
When zero, the temperature difference between the temperature of indoor heat exchanger 9 and the return air temperature of indoor set 200 is obtained, and judge indoor heat exchange
The temperature of device 9 whether is more than or equal to the first preset temperature and whether temperature difference is more than or equal to the second preset temperature, Yi Ji
When the temperature of indoor heat exchanger 9 is more than or equal to the first preset temperature and temperature difference and is more than or equal to the second preset temperature, control
Air-conditioning system enters frequency reducing control model.
According to one embodiment of present invention, the first temperature detecting unit 10 may be provided at outdoor heat exchanger 5 inside or
Outside, second temperature detection unit 20 may be provided at the internal or external of indoor heat exchanger 9, and the 3rd temperature detecting unit 30 can be set
Put the return air inlet of machine 200 indoors.Wherein, the temperature Tb for the indoor heat exchanger 9 that can be detected by second temperature detection unit 20
The return air temperature Tc of the indoor set of the 3rd temperature detecting unit 30 detection is subtracted, to obtain the temperature of indoor heat exchanger and indoor set
Return air temperature between temperature difference Tb-Tc.
It should be noted that in environment temperature is 0-7 DEG C of heat pump heating operations, the temperature Ta of outdoor heat exchanger can be in
Two kinds of situations higher than 0 DEG C and less than or equal to 0 DEG C, it is when the temperature Ta of outdoor heat exchanger is higher than 0 DEG C, i.e. empty during 0 DEG C of Ta ＞
Adjusting system can longer-term stable operation will not carry out defrost, but need to be fitted in the case of outdoor heat exchange ability is maximized
When reduction compressor frequency, i.e., the decline that the wind pushing temperature of indoor set can be appropriate；When the temperature Ta of outdoor heat exchanger is less than or waits
When 0 DEG C, i.e., Ta≤0 DEG C when, the frosting of outdoor heat exchanger occurs in air-conditioning system after operation a period of time, frosting can seriously drop
The heating capacity of low latitude adjusting system, or even the comfortableness for causing heat supply by phased manner to reduce user.
Based on this, in embodiments of the present invention, after establishing machine by cable in air-conditioning system, control unit 40 control air-conditioning system with
Heating mode is run, and when the temperature of outdoor heat exchanger 5 is less than or equal to zero, obtains temperature and the interior of indoor heat exchanger 9
Temperature difference between the return air temperature of machine 200, and judge whether the temperature of indoor heat exchanger 9 is more than or equal to the first preset temperature
And whether temperature difference is more than or equal to the second preset temperature, and the temperature of heat exchanger 9 is default more than or equal to first indoors
Temperature and when temperature difference is more than or equal to the second preset temperature, control unit 40 controls air-conditioning system to enter frequency reducing control model.
According to one embodiment of present invention, after control air-conditioning system enters frequency reducing control model, control unit 40
It is additionally operable to, controlling the running frequency of the compressor of air-conditioning system reduces predeterminated frequency, and judges indoor heat exchange every preset time
Whether the temperature and temperature difference of device 9 meet exit criteria, and the temperature of heat exchanger 9 and temperature difference meet exit criteria indoors
When, control air-conditioning system exits frequency reducing control model.
Further, control unit 40 is additionally operable to, and the temperature Tb and temperature difference Tb-Tc of heat exchanger 9 are unsatisfactory for moving back indoors
When going out condition, judge whether the temperature Tb of outdoor heat exchanger 5 is less than or equal to zero, and be less than in the temperature Tb of outdoor heat exchanger 5
Or during equal to zero, the running frequency of compressor is controlled to continue to reduce predeterminated frequency, and be more than zero in the temperature Tb of outdoor heat exchanger 5
When, control the running frequency of compressor to keep constant.
Specifically, after control air-conditioning system enters frequency reducing control model, control unit 40 air-conditioning can be controlled first
The running frequency of the compressor of system reduces predeterminated frequency, wherein, predeterminated frequency Δ F can be 8Hz, then every preset time Δ
T (preset time Δ T can be 3 minutes) obtains the temperature Tb and temperature difference Tb-Tc of indoor heat exchanger 9, and control unit 40 judges room
Whether the temperature Tb and temperature difference Tb-Tc of interior heat exchanger 9 meet exit criteria, if the temperature Tb and temperature of indoor heat exchanger 9
Poor Tb-Tc meets exit criteria, then control unit 40 controls air-conditioning system to exit frequency reducing control model；If indoor heat exchanger 9
Temperature Tb and temperature difference Tb-Tc be unsatisfactory for exit criteria, then control unit 40 judges whether the temperature Ta of outdoor heat exchanger 5 small
In or equal to zero；If the temperature Ta of outdoor heat exchanger 5 is less than or equal to zero, control unit 40 controls the operation frequency of compressor
Rate continues to reduce predeterminated frequency；If the temperature Ta of outdoor heat exchanger 5 is more than zero, control unit 40 controls the operation of compressor
Frequency keeps constant.
That is, after the running frequency of the compressor of control air-conditioning system reduces predeterminated frequency, indoor heat exchange is judged
Whether the temperature Tb and temperature difference Tb-Tc of device meet exit criteria, if the temperature Tb and temperature difference Tb-Tc of indoor heat exchanger 9
Meet exit criteria, then show that the air-conditioning system after frequency reducing can not meet the comfortableness demand of user, control air-conditioning system exits
Frequency reducing control model；If the temperature Tb and temperature difference Tb-Tc of indoor heat exchanger 9 are unsatisfactory for exit criteria, judge that outdoor is changed
If the temperature Ta whether the temperature Ta of hot device 5 is less than or equal to zero outdoor heat exchanger 5 is less than or equal to zero, show air-conditioning system
The still easy frosting of system, the running frequency of compressor is controlled to continue to reduce predeterminated frequency；If the temperature Ta of outdoor heat exchanger 5 is big
In zero, show that air-conditioning system reaches steady operational status, then control the running frequency of compressor to keep constant.
According to one embodiment of present invention, exit criteria includes：The temperature of indoor heat exchanger 9 is less than the first preset temperature
And the difference or temperature difference of the first predetermined threshold value are less than the difference of the second preset temperature and the second predetermined threshold value, wherein, the first default threshold
Value and the second predetermined threshold value are all higher than zero.Specifically, the first preset temperature can be 38 DEG C, and the second preset temperature can be 15 DEG C, the
One predetermined threshold value and the second predetermined threshold value can be 2 DEG C.
That is, control unit 40 judges whether the temperature Tb and temperature difference Tb-Tc of indoor heat exchanger 9 meet to exit bar
The condition of part includes：The temperature Tb of indoor heat exchanger 9 is less than the difference of the first preset temperature and the first predetermined threshold value, such as Tb ＜ 36
DEG C, or temperature difference Tb-Tc is less than the second preset temperature and the difference of the second predetermined threshold value, such as 13 DEG C of Tb-Tc ＜.
Specifically, as 36 DEG C of Tb ＜ or 13 DEG C of Tb-Tc ＜, then control unit 40 judges to meet that exit criteria control is empty
Adjusting system exits frequency reducing control model；Conversely, then control unit 40 judges to be unsatisfactory for exit criteria, now, control unit 40 is sentenced
Whether the temperature Ta of disconnected outdoor heat exchanger 5 is less than or equal to zero, if 0 DEG C of the temperature Ta ＜ of outdoor heat exchanger 5, control unit
The running frequency of 40 control compressors continues to reduce predeterminated frequency；If 0 DEG C of the temperature Ta ＞ of outdoor heat exchanger 5, control pressure
The running frequency of contracting machine keeps constant.
In summary, the control device of the air-conditioning system proposed according to embodiments of the present invention, control unit control air-conditioning system
When system is run with heating mode, by obtaining, the first temperature detecting unit detects the temperature of outdoor heat exchanger, second temperature detects
The temperature of unit detection indoor heat exchanger and the return air temperature of the 3rd temperature detecting unit detection indoor set, and in outdoor heat exchanger
Temperature be less than or equal to zero when, obtain the temperature difference between the temperature of indoor heat exchanger and the return air temperature of indoor set, and sentence
Whether the temperature of disconnected indoor heat exchanger is more than or equal to the first preset temperature and whether temperature difference is more than or equal to the second default temperature
Degree, and the temperature of heat exchanger is more than or equal to the first preset temperature indoors and temperature difference is more than or equal to the second preset temperature
When, thus control air-conditioning system enters frequency redution mode, the control device of the embodiment of the present invention can ensure sending for air-conditioning system
The return air temperature difference, it is ensured that on the premise of the comfortableness of user, by carrying out frequency reducing control to air-conditioning system, the defrost cycle is extended,
Ensure the stationarity of wind pushing temperature, while improve the efficiency of system, reduce the energy consumption of system, realize Energy Saving Control, carry
Rise the experience of user.
The embodiment of the present invention also proposed a kind of air-conditioning system.
Fig. 7 is the block diagram of air-conditioning system according to embodiments of the present invention.As shown in fig. 7, air-conditioning system 400 includes
The control device 300 of above-mentioned air-conditioning system.
The air-conditioning system proposed according to embodiments of the present invention, by the control device of air-conditioning system, air-conditioning can ensured
The air blow and return temperature difference of system, it is ensured that on the premise of the comfortableness of user, extend the defrost cycle, ensure the stationarity of wind pushing temperature,
The efficiency of system is improved simultaneously, is reduced the energy consumption of system, is realized Energy Saving Control, lifts the experience of user.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or
Position relationship, it is for only for ease of and describes the present invention and simplify description, rather than indicates or imply that signified device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the invention, " multiple " are meant that at least two, such as two, three
It is individual etc., unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or electrically connect；Can be joined directly together, can also be indirectly connected by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements, limited unless otherwise clear and definite.For one of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature can be with "above" or "below" second feature
It is that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height and is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the different embodiments or example and the feature of different embodiments or example described in this specification
Close and combine.
Any process or method described otherwise above description in flow chart or herein is construed as, and represents to include
Module, fragment or the portion of the code of the executable instruction of one or more the step of being used to realize custom logic function or process
Point, and the scope of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discuss suitable
Sequence, including according to involved function by it is basic simultaneously in the way of or in the opposite order, carry out perform function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use
In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (such as computer based system including the system of processor or other can be held from instruction
The system of row system, device or equipment instruction fetch and execute instruction) use, or combine these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable medium " can any can be included, store, communicate, propagate or pass
Defeated program is for instruction execution system, device or equipment or the dress used with reference to these instruction execution systems, device or equipment
Put.The more specifically example (non-exhaustive list) of computer-readable medium includes following：Electricity with one or more wiring
Connecting portion (electronic installation), portable computer diskette box (magnetic device), random access memory (RAM), read-only storage
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device, and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, computer-readable medium, which can even is that, to print the paper of described program thereon or other are suitable
Medium, because can then enter edlin, interpretation or if necessary with it for example by carrying out optical scanner to paper or other media
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each several part of the present invention can be realized with hardware, software, firmware or combinations thereof.Above-mentioned
In embodiment, software that multiple steps or method can be performed in memory and by suitable instruction execution system with storage
Or firmware is realized.Such as, if realized with hardware with another embodiment, following skill well known in the art can be used
Any one of art or their combination are realized：With the logic gates for realizing logic function to data-signal from
Logic circuit is dissipated, the application specific integrated circuit with suitable combinational logic gate circuit, programmable gate array (PGA), scene can compile
Journey gate array (FPGA) etc..
Those skilled in the art are appreciated that to realize all or part of step that above-described embodiment method carries
Suddenly it is that by program the hardware of correlation can be instructed to complete, described program can be stored in a kind of computer-readable storage medium
In matter, the program upon execution, including one or a combination set of the step of embodiment of the method.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing module, can also
That unit is individually physically present, can also two or more units be integrated in a module.Above-mentioned integrated mould
Block can both be realized in the form of hardware, can also be realized in the form of software function module.The integrated module is such as
Fruit is realized in the form of software function module and as independent production marketing or in use, can also be stored in a computer
In read/write memory medium.
Storage medium mentioned above can be read-only storage, disk or CD etc..Although have been shown and retouch above
Embodiments of the invention are stated, it is to be understood that above-described embodiment is exemplary, it is impossible to be interpreted as the limit to the present invention
System, one of ordinary skill in the art can be changed to above-described embodiment, change, replace and become within the scope of the invention
Type.
Claims (12)
1. a kind of control method of air-conditioning system, it is characterised in that comprise the following steps：
When controlling the air-conditioning system to be run with heating mode, the temperature of the outdoor heat exchanger of the air-conditioning system is obtained；
When the temperature of the outdoor heat exchanger is less than or equal to zero, the temperature of indoor heat exchanger and the return air temperature of indoor set are obtained
Degree, and obtain the temperature difference between the temperature of the indoor heat exchanger and the return air temperature of the indoor set；
Judge the indoor heat exchanger temperature whether be more than or equal to the first preset temperature and the temperature difference whether be more than or
Equal to the second preset temperature；
If the temperature of the indoor heat exchanger is more than or equal to first preset temperature and the temperature difference is more than or equal to
Second preset temperature, then the air-conditioning system is controlled to enter frequency reducing control model.
2. the control method of air-conditioning system according to claim 1, it is characterised in that enter institute controlling the air-conditioning system
After stating frequency reducing control model, methods described also includes：
Controlling the running frequency of the compressor of the air-conditioning system reduces predeterminated frequency, and judges the interior every preset time
Whether the temperature of heat exchanger and the temperature difference meet exit criteria；
If the temperature of the indoor heat exchanger and the temperature difference meet the exit criteria, the air-conditioning system is controlled to move back
Go out the frequency reducing control model.
3. the control method of air-conditioning system according to claim 2, it is characterised in that
If the temperature of the indoor heat exchanger and the temperature difference are unsatisfactory for the exit criteria, the outdoor heat exchange is judged
Whether the temperature of device is less than or equal to zero；
If the temperature of the outdoor heat exchanger is less than or equal to zero, the running frequency of the compressor is controlled to continue to reduce institute
State predeterminated frequency；
If the temperature of the outdoor heat exchanger is more than zero, the running frequency of the compressor is controlled to keep constant.
4. the control method of air-conditioning system according to claim 3, wherein, the exit criteria includes：The indoor heat exchange
The temperature of device is less than first preset temperature and the difference of the first predetermined threshold value or the temperature difference is less than the described second default temperature
The difference of degree and the second predetermined threshold value, wherein, first predetermined threshold value and second predetermined threshold value are all higher than zero.
5. the control method of air-conditioning system according to claim 4, wherein, first preset temperature is 38 DEG C, described the
Two preset temperatures are 15 DEG C, and first predetermined threshold value and second predetermined threshold value are 2 DEG C.
6. a kind of non-transitorycomputer readable storage medium, is stored thereon with computer program, it is characterised in that the program quilt
The control method of the air-conditioning system as described in any in claim 1-5 is realized during computing device.
A kind of 7. control device of air-conditioning system, it is characterised in that including：
The first temperature detecting unit of the outdoor heat exchanger of the air-conditioning system is arranged at, first temperature detecting unit is used for
Detect the temperature of the outdoor heat exchanger；
The second temperature detection unit of the indoor heat exchanger of the air-conditioning system is arranged at, the second temperature detection unit is used for
Detect the temperature of the indoor heat exchanger；
It is arranged at the 3rd temperature detecting unit of the return air inlet of the indoor set of the air-conditioning system, the 3rd temperature detecting unit
For detecting the return air temperature of the indoor set；
Control unit, described control unit respectively with first temperature detecting unit, the second temperature detection unit and institute
The 3rd temperature detecting unit to be stated to be connected, described control unit is used to control the air-conditioning system to run with heating mode, and in institute
When stating the temperature of outdoor heat exchanger less than or equal to zero, the temperature of the indoor heat exchanger and the return air temperature of the indoor set are obtained
Temperature difference between degree, and judge whether the temperature of the indoor heat exchanger is more than or equal to the first preset temperature and the temperature
Whether difference is more than or equal to the second preset temperature, and default more than or equal to described first in the temperature of the indoor heat exchanger
Temperature and when the temperature difference is more than or equal to second preset temperature, controls the air-conditioning system to enter frequency reducing control mould
Formula.
8. the control device of air-conditioning system according to claim 7, it is characterised in that enter institute controlling the air-conditioning system
After stating frequency reducing control model, described control unit is additionally operable to, and is controlled the running frequency of the compressor of the air-conditioning system and is reduced
Predeterminated frequency, and judge whether the temperature of the indoor heat exchanger and the temperature difference meet exit criteria every preset time,
And when the temperature of the indoor heat exchanger and the temperature difference meet the exit criteria, the air-conditioning system is controlled to exit
The frequency reducing control model.
9. the control device of air-conditioning system according to claim 8, it is characterised in that described control unit is additionally operable to, in institute
State the temperature of indoor heat exchanger and when the temperature difference is unsatisfactory for the exit criteria, judging the temperature of the outdoor heat exchanger is
It is no to be less than or equal to zero, and when the temperature of the outdoor heat exchanger is less than or equal to zero, control the operation frequency of the compressor
Rate continues to reduce the predeterminated frequency, and when the temperature of the outdoor heat exchanger is more than zero, controls the operation of the compressor
Frequency keeps constant.
10. the control device of air-conditioning system according to claim 9, it is characterised in that wherein, the exit criteria includes：
The temperature of the indoor heat exchanger is less than first preset temperature and the difference of the first predetermined threshold value or the temperature difference is less than institute
The difference of the second preset temperature and the second predetermined threshold value is stated, wherein, first predetermined threshold value and second predetermined threshold value are big
In zero.
11. the control device of air-conditioning system according to claim 10, it is characterised in that wherein, first preset temperature
For 38 DEG C, second preset temperature is 15 DEG C, and first predetermined threshold value and second predetermined threshold value are 2 DEG C.
12. a kind of air-conditioning system, it is characterised in that include the control of the air-conditioning system according to any one of claim 6-11
Device processed.
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| CN201710744828.1A CN107543288B (en) | 2017-08-25 | 2017-08-25 | Air conditioning system, and control method and device of air conditioning system |
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| CN201710744828.1A CN107543288B (en) | 2017-08-25 | 2017-08-25 | Air conditioning system, and control method and device of air conditioning system |
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| CN110470000A (en) * | 2019-07-28 | 2019-11-19 | 青岛海尔空调器有限总公司 | For the control method of air-conditioner defrosting, device and air-conditioning |
| CN110469995A (en) * | 2019-07-28 | 2019-11-19 | 青岛海尔空调器有限总公司 | For the control method of air-conditioner defrosting, device and air-conditioning |
| CN110469999A (en) * | 2019-07-28 | 2019-11-19 | 青岛海尔空调器有限总公司 | For the control method of air-conditioner defrosting, device and air-conditioning |
| CN110469998A (en) * | 2019-07-28 | 2019-11-19 | 青岛海尔空调器有限总公司 | For the control method of air-conditioner defrosting, device and air-conditioning |
| CN110469991A (en) * | 2019-07-28 | 2019-11-19 | 青岛海尔空调器有限总公司 | For the control method of air-conditioner defrosting, device and air-conditioning |
| CN110469994A (en) * | 2019-07-28 | 2019-11-19 | 青岛海尔空调器有限总公司 | For the control method of air-conditioner defrosting, device and air-conditioning |
| CN110469992A (en) * | 2019-07-28 | 2019-11-19 | 青岛海尔空调器有限总公司 | For the control method of air-conditioner defrosting, device and air-conditioning |
| CN110469996A (en) * | 2019-07-28 | 2019-11-19 | 青岛海尔空调器有限总公司 | For the control method of air-conditioner defrosting, device and air-conditioning |
| CN110857805A (en) * | 2018-08-24 | 2020-03-03 | 珠海格力电器股份有限公司 | Control method and system for prolonging frosting period and air conditioner |
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