CN104990230B - Air-conditioning system and its control method - Google Patents
Air-conditioning system and its control method Download PDFInfo
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- CN104990230B CN104990230B CN201510452061.6A CN201510452061A CN104990230B CN 104990230 B CN104990230 B CN 104990230B CN 201510452061 A CN201510452061 A CN 201510452061A CN 104990230 B CN104990230 B CN 104990230B
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- temperature
- supercooling
- heat exchanger
- degree
- magnetic valve
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
Abstract
The invention discloses a kind of air-conditioning system and its control method, wherein, air-conditioning system includes outdoor unit and indoor set, and electric expansion valve, preceding heat exchanger, magnetic valve and rear heat exchanger, the control method that indoor set includes being sequentially connected in series comprise the following steps：When receiving constant temperature dehumidification instruction, the temperature gap between indoor environment temperature and design temperature is obtained, and temperature gap is judged；When temperature gap is less than the first temperature threshold, control air-conditioning system enters constant temperature dehumidification pattern, and the outlet temperature of heat exchanger and the front end degree of supercooling of magnetic valve after acquisition；And the wind shelves of inner blower are adjusted according to the front end degree of supercooling of magnetic valve, and the aperture of electric expansion valve is adjusted according to the outlet temperature of rear heat exchanger and the front end degree of supercooling of magnetic valve.It is not in frequent startup-shutdown that the control method, which can guarantee that while indoor temperature and humidity reaches demand, improves comfortableness, and ensure that the energy saving of air-conditioning system.
Description
Technical field
The present invention relates to air-conditioning technical field, the control method and a kind of air-conditioning system of more particularly to a kind of air-conditioning system.
Background technology
Dehumidifying is a kind of seasonal demand of China the Changjiang river areas to the south, and the plum rain season in annual spring, air themperature is not
Height, but humidity is very big, and wall floor and furniture surface are easy to condensation occur, and this just needs to be dehumidified by air-conditioning system.
When solving this dehumidification, generally use reduces air-conditioning internal machine air-supply wind speed or subtracted existing dehumidifying technology
Small throttle orifice footpath, so as to reduce evaporating temperature, reduce aobvious latent heat ratio, reach dehumidifying purpose.But the program dehumidifying while,
The fan-out capability of system is reduced, moisture removal reduces, and easily causes indoor temperature decline and frequent startup-shutdown, causes comfortableness
Decline with energy saving.
The content of the invention
It is contemplated that at least solves one of technical problem in above-mentioned technology to a certain extent.Therefore, the present invention
One purpose is to propose a kind of control method of air-conditioning system, can guarantee that while indoor temperature and humidity reaches demand and is not in
Frequent startup-shutdown, comfortableness is improved, and ensure that the energy saving of air-conditioning system.
It is another object of the present invention to propose a kind of air-conditioning system.
To reach above-mentioned purpose, one aspect of the present invention embodiment proposes a kind of control method of air-conditioning system, wherein, institute
Stating air-conditioning system includes outdoor unit and indoor set, electric expansion valve that the indoor set includes being sequentially connected in series, preceding heat exchanger,
Magnetic valve and rear heat exchanger, the first end of the front end of the electric expansion valve also with the outdoor unit are connected, it is described after heat exchanger
Outlet be also connected with the second end of the outdoor unit, the control method comprises the following steps：Refer to receiving constant temperature dehumidification
When making, the temperature gap between indoor environment temperature and design temperature is obtained, and the temperature gap is judged；When described
When temperature gap is less than the first temperature threshold, control the air-conditioning system to enter constant temperature dehumidification pattern, and obtain the rear heat exchange
The front end degree of supercooling of the outlet temperature of device and the magnetic valve；And the front end degree of supercooling regulation inner blower according to the magnetic valve
Wind shelves, and the electric expansion valve is adjusted according to the outlet temperature of heat exchanger after described and the front end degree of supercooling of the magnetic valve
Aperture.
The control method of air-conditioning system according to embodiments of the present invention, when air-conditioning system receives constant temperature dehumidification instruction,
Judge whether to control air-conditioning system to remove into constant temperature by obtaining the temperature gap between indoor environment temperature and design temperature
Wet model, and after air-conditioning system enters constant temperature dehumidification pattern, the outlet temperature of heat exchanger and the front end mistake of magnetic valve after acquisition
Cold degree, then according to the wind shelves of the front end degree of supercooling regulation inner blower of magnetic valve, and according to the outlet temperature and electricity of rear heat exchanger
The aperture of the front end degree of supercooling regulation electric expansion valve of magnet valve, constant temperature dehumidification control is carried out so as to realize to air-conditioning system, can
Ensure while indoor temperature and humidity reaches demand to be not in frequent startup-shutdown, improve comfortableness, and ensure that air-conditioning system
Energy saving.
According to one embodiment of present invention, when the temperature gap is more than or equal to first temperature threshold, control
Make the air-conditioning system and enter refrigeration mode.
According to one embodiment of present invention, the front end degree of supercooling of the magnetic valve is obtained according to below equation：
SCm=T2a-Tm
Wherein, SCm is the front end degree of supercooling of the magnetic valve, and T2a is the inlet temperature of the preceding heat exchanger, and Tm is described
The head temperature of magnetic valve.
According to one embodiment of present invention, according to the wind shelves of the front end degree of supercooling regulation inner blower of the magnetic valve, tool
Body includes：Judge the front end degree of supercooling of the magnetic valve；When the front end degree of supercooling of the magnetic valve is less than the first default degree of supercooling
When, improve the wind shelves of the inner blower；When the front end degree of supercooling of the magnetic valve is more than or equal to the second default degree of supercooling, drop
The wind shelves of the low inner blower, wherein, the described second default degree of supercooling is more than the described first default degree of supercooling.
According to one embodiment of present invention, according to the rear outlet temperature of heat exchanger and the front end mistake of the magnetic valve
Cold degree adjusts the aperture of the electric expansion valve, specifically includes：Described in being more than or equal to when the front end degree of supercooling of the magnetic valve
First default degree of supercooling and during less than the described second default degree of supercooling, judges the outlet temperature of the heat exchanger afterwards；It is if described
The outlet temperature of heat exchanger is more than second temperature threshold value afterwards, then reduces the aperture of the electric expansion valve；If exchanged heat after described
The outlet temperature of device is less than the 3rd temperature threshold, then increases the aperture of the electric expansion valve, wherein, the second temperature threshold value
More than the 3rd temperature threshold.
According to one embodiment of present invention, the outlet temperature of heat exchanger is more than or equal to the 3rd temperature when described after
Threshold value and when being less than or equal to the second temperature threshold value, in addition to：Judge current indoor environment temperature and the first preset time
The difference between indoor environment temperature before；If the current indoor environment temperature and the room before first preset time
Difference between interior environment temperature is less than the 4th temperature threshold, then is sent to the outdoor unit and improve condensation temperature request；If
The difference between indoor environment temperature before the current indoor environment temperature and first preset time is more than or equal to institute
The 4th temperature threshold is stated, then keeps the current aperture of the electric expansion valve constant, and keeps the current wind shelves of the inner blower
It is constant.
Therefore, in an embodiment of the present invention, additionally it is possible to which the indoor set with constant-temperature dehumidifying function is applied to multi-connected machine
System, solves the dehumidification of indoor set in the multiple on-line system of outer owner's control, avoiding indoor set needs to control outdoor unit
Situation.
To reach above-mentioned purpose, a kind of air-conditioning system that another aspect of the present invention embodiment proposes, including：Outdoor unit；Room
Interior machine, the indoor set include electric expansion valve, preceding heat exchanger, magnetic valve and the rear heat exchanger being sequentially connected in series, the electricity
First end of the front end of sub- expansion valve also with the outdoor unit is connected, it is described after heat exchanger outlet also with the outdoor unit the
Two ends connect；Control module, the control module obtain indoor environment temperature and setting temperature when receiving constant temperature dehumidification instruction
Temperature gap between degree, and the temperature gap is judged, wherein, when the temperature gap is less than the first temperature threshold
When, the control module controls the air-conditioning system to enter constant temperature dehumidification pattern, and obtains the outlet temperature of the rear heat exchanger
With the front end degree of supercooling of the magnetic valve, and the wind shelves of the front end degree of supercooling regulation inner blower according to the magnetic valve, and root
The aperture of the electric expansion valve is adjusted according to the outlet temperature of the rear heat exchanger and the front end degree of supercooling of the magnetic valve.
Air-conditioning system according to embodiments of the present invention, control module is when receiving constant temperature dehumidification instruction, by obtaining room
Temperature gap between interior environment temperature and design temperature judges whether to control the air-conditioning system enter constant temperature dehumidification pattern, and
After air-conditioning system enters constant temperature dehumidification pattern, the front end of the outlet temperature of heat exchanger and magnetic valve supercooling after control module obtains
Degree, then according to the wind shelves of the front end degree of supercooling regulation inner blower of magnetic valve, and according to the outlet temperature and electromagnetism of rear heat exchanger
The aperture of the front end degree of supercooling regulation electric expansion valve of valve, so as to realize constant temperature dehumidification control, can ensure that indoor temperature and humidity reaches
Be not in frequent startup-shutdown while to demand, improve comfortableness, and ensure that energy saving.
According to one embodiment of present invention, when the temperature gap is more than or equal to first temperature threshold, institute
Stating control module controls the air-conditioning system to enter refrigeration mode.
According to one embodiment of present invention, the control module obtains the front end mistake of the magnetic valve according to below equation
Cold degree：
SCm=T2a-Tm
Wherein, SCm is the front end degree of supercooling of the magnetic valve, and T2a is the inlet temperature of the preceding heat exchanger, and Tm is described
The head temperature of magnetic valve.
According to one embodiment of present invention, the control module is in the front end degree of supercooling regulation according to the magnetic valve
During the wind shelves of blower fan, the front end degree of supercooling of the magnetic valve is judged；Preset when the front end degree of supercooling of the magnetic valve is less than first
During degree of supercooling, the control module improves the wind shelves of the inner blower；When the front end degree of supercooling of the magnetic valve is more than or equal to
During the second default degree of supercooling, the control module reduces the wind shelves of the inner blower, wherein, the described second default degree of supercooling is more than
Described first default degree of supercooling.
According to one embodiment of present invention, the control module is in the outlet temperature according to heat exchanger after described and described
When the front end degree of supercooling of magnetic valve adjusts the aperture of the electric expansion valve, when the front end degree of supercooling of the magnetic valve is more than or waits
When presetting degree of supercooling in described first and presetting degree of supercooling less than described second, the control module judges the rear heat exchanger
Outlet temperature；If the outlet temperature of heat exchanger is more than second temperature threshold value after described, the control module then reduces the electricity
The aperture of sub- expansion valve；If the outlet temperature of heat exchanger is less than the 3rd temperature threshold after described, the control module then increases
The aperture of the electric expansion valve, wherein, the second temperature threshold value is more than the 3rd temperature threshold.
According to one embodiment of present invention, the outlet temperature of heat exchanger is more than or equal to the 3rd temperature when described after
Threshold value and when being less than or equal to the second temperature threshold value, the control module also judge current indoor environment temperature and first pre-
If the difference between indoor environment temperature before the time；If the current indoor environment temperature and first preset time
Difference between preceding indoor environment temperature is less than the 4th temperature threshold, then sending raising condensation temperature to the outdoor unit please
Ask；If the difference between indoor environment temperature before the current indoor environment temperature and first preset time be more than or
Equal to the 4th temperature threshold, then keep the current aperture of the electric expansion valve constant, and kept for working as the inner blower
Preceding wind shelves are constant.
Therefore, in the air-conditioning system of the embodiment of the present invention, additionally it is possible to be applied to the indoor set with constant-temperature dehumidifying function
Multiple on-line system, solves the dehumidification of indoor set in the multiple on-line system of outer owner's control, avoiding indoor set needs to control
The situation of outdoor unit.
Brief description of the drawings
Fig. 1 is the flow chart according to the control method of the air-conditioning system of the embodiment of the present invention；
Fig. 2 is the control flow chart for entering constant temperature dehumidification pattern according to the air-conditioning system of one embodiment of the invention；
Fig. 3 is the control flow chart entered according to the air-conditioning system of one embodiment of the invention after constant temperature dehumidification pattern；With
And
Fig. 4 is the system structure diagram according to the air-conditioning system of one embodiment of the 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.
The control method and air-conditioning system of the air-conditioning system that it is proposed according to embodiments of the present invention described with reference to the accompanying drawings.
Fig. 1 is the flow chart according to the control method of the air-conditioning system of the embodiment of the present invention.Wherein, the air-conditioning system includes
Outdoor unit and indoor set, indoor set include electric expansion valve, preceding heat exchanger, magnetic valve and the rear heat exchanger being sequentially connected in series,
The front end of electric expansion valve is also connected with the first end of outdoor unit, and the outlet of rear heat exchanger is also connected with the second end of outdoor unit.
As shown in figure 1, the control method of the air-conditioning system comprises the following steps：
S1, when receiving constant temperature dehumidification instruction, the temperature gap between indoor environment temperature and design temperature is obtained, and
Temperature gap is judged.
Wherein, temperature gap △ Ts=indoor environment temperatures Troom- design temperature Ts, indoor environment temperature Troom can lead to
Cross and be disposed in the interior the temperature sensor of return air inlet position and detect to obtain, design temperature Ts can pass through the chain of command of air-conditioning system
Plate, remote control/line control machine etc. are set.
S2, when temperature gap is less than the first temperature threshold, control air-conditioning system enters constant temperature dehumidification pattern, and after acquisition
The outlet temperature of heat exchanger and the front end degree of supercooling of magnetic valve.
Wherein, the first temperature threshold can be 4 degree, and rear heat exchanger is that the outlet temperature T2b of evaporator can be by being arranged on
The temperature-sensitive bag of heat exchanger exit detects to obtain afterwards.
According to one embodiment of present invention, the front end degree of supercooling of magnetic valve can be obtained according to below equation：
SCm=T2a-Tm
Wherein, SCm is the front end degree of supercooling of magnetic valve, and T2a is the inlet temperature of preceding heat exchanger, and Tm is the front end of magnetic valve
Temperature.T2a can detect to obtain by the temperature-sensitive bag of heat exchanger entrance before being arranged on, and Tm can be by being arranged on the temperature-sensitive before magnetic valve
Bag detection obtains.
S3, according to the wind shelves of the front end degree of supercooling of magnetic valve regulation inner blower, and according to the outlet temperature of rear heat exchanger and
The aperture of the front end degree of supercooling regulation electric expansion valve of magnetic valve.
Specifically, according to one embodiment of present invention, as shown in Fig. 2 air-conditioning system enters the control of constant temperature dehumidification pattern
Flow processed comprises the following steps：
S201, user select constant temperature dehumidification pattern.
S202, detection design temperature Ts.
S203, detection indoor environment temperature is return air temperature Troom.
S204, obtain the temperature gap △ Ts=Troom-Ts between indoor environment temperature and design temperature.
S205, judges whether temperature gap △ Ts are less than such as 4 degree of the first temperature threshold.If it is, perform step S206；
If not, perform step S207.
S206, control air-conditioning system enter constant temperature dehumidification pattern, then perform step S208.
S207, control air-conditioning system enter refrigeration mode, then perform step S208.
S208, air-conditioning system continuous service is after such as 10 minutes for a period of time, return to step S203.
Specifically, in one embodiment of the invention, as shown in figure 3, air-conditioning system enter constant temperature dehumidification pattern after
Control flow comprises the following steps：
S301, air-conditioning system enter constant temperature dehumidification pattern.
S302, electricity on magnetic valve.Wherein, magnetic valve power-off is for full-gear, closed in electrified state to a specific aperture.
S303, electric expansion valve are opened to initial opening such as 480pls, and inner blower is with low wind mode operation.Wherein, electronics
Expansion valve can first close 500pls and open again to 480pls.
S304, after such as 5 minutes a period of time, such as 30 seconds at regular intervals detections T2a, Tm and T2b, and obtain electricity
The front end degree of supercooling SCm=T2a-Tm of magnet valve.
S305, judges whether the front end degree of supercooling SCm of magnetic valve is less than the first default such as 2 degree of degree of supercooling.If it is, hold
Row step S306；If not, perform step S307.
S306, for example interior wind shelves+1 of wind shelves of inner blower are improved, are then back to step S304.
S307, judges whether the front end degree of supercooling SCm of magnetic valve is more than or equal to the second default such as 8 degree of degree of supercooling.Such as
Fruit is to perform step S308；If not, perform step S309.
S308, for example interior wind shelves -1 of wind shelves of inner blower is reduced, is then back to step S304.
That is, specifically included according to the wind shelves of the front end degree of supercooling regulation inner blower of magnetic valve：Judge the electromagnetism
The front end degree of supercooling of valve；When the front end degree of supercooling of the magnetic valve is less than the first default degree of supercooling, the inner blower is improved
Wind shelves；When the front end degree of supercooling of the magnetic valve is more than or equal to the second default degree of supercooling, the wind shelves of the inner blower are reduced,
Wherein, the described second default degree of supercooling is more than the described first default degree of supercooling.
S309, whether the outlet temperature T2b of heat exchanger is more than such as 12 degree of second temperature threshold value after judgement.If not, hold
Row step S310；If it is, perform step S311.
S310, whether the outlet temperature T2b of heat exchanger is less than such as 2 degree of the 3rd temperature threshold after judgement.If it is, perform
Step S313；If not, perform step S317.
S311, judges whether the current aperture of electric expansion valve is more than minimum aperture and adjustment aperture such as 8pls sums.
If it is, perform step S312；If not, perform step S315.
S312, the aperture for reducing electric expansion valve for example reduce 8pls, are then back to step S304.
S313, judges whether the current aperture of electric expansion valve is less than maximum opening and adjusts aperture such as 8pls difference.
If it is, perform step S314；If not, perform step S316.
S314, the aperture for increasing electric expansion valve for example increase 8pls, are then back to step S304.
That is, the electricity is adjusted according to the front end degree of supercooling of the outlet temperature of the rear heat exchanger and the magnetic valve
The aperture of sub- expansion valve, is specifically included：When the front end degree of supercooling of the magnetic valve is more than or equal to the described first default degree of supercooling
And during less than the described second default degree of supercooling, judge the outlet temperature of the rear heat exchanger；If the outlet of heat exchanger after described
Temperature is more than second temperature threshold value, then reduces the aperture of the electric expansion valve；If the outlet temperature of heat exchanger is small after described
In the 3rd temperature threshold, then increase the aperture of the electric expansion valve, wherein, the second temperature threshold value is more than the described 3rd temperature
Spend threshold value.
S315, the minimum mark of electronic expansion valve opening is sent to outdoor unit.
S316, the maximum mark of electronic expansion valve opening is sent to outdoor unit.
S317, every such as 2 minutes detection indoor environment temperature Troom of the first preset time, wherein, enter perseverance for the first time
Do not detected in 5 minutes during warm dehumidification mode.
S318, judge difference between the indoor environment temperature before current indoor environment temperature and the first preset time i.e.
Tiroom-Ti-1Whether room, which is less than the 4th temperature threshold such as -1, is spent, wherein, TiRoom is the indoor environment temperature of current detection
Degree, Ti-1Room is the indoor environment temperature of detection before 2 minutes.If it is, perform step S319.If not, perform step
S320。
S319, sent to outdoor unit and improve condensation temperature request.
S320, keep the constant current aperture for keeping electric expansion valve of current setting and the current gear of inner blower not
Become, and after such as 2 minutes for a period of time, return to step S304.
That is, the outlet temperature of heat exchanger is more than or equal to the 3rd temperature threshold and is less than or waits when described after
When the second temperature threshold value, also judge indoor environment temperature before current indoor environment temperature and the first preset time it
Between difference；If the difference between indoor environment temperature before the current indoor environment temperature and first preset time
Less than the 4th temperature threshold, then sent to the outdoor unit and improve condensation temperature request；If the current indoor environment temperature
Difference between the indoor environment temperature before first preset time is more than or equal to the 4th temperature threshold, then keeps
The current aperture of the electric expansion valve is constant, and keeps the current wind shelves of the inner blower constant.
In summary, in an embodiment of the present invention, after air-conditioning system enters constant temperature dehumidification pattern, wind in regulation is passed through
The wind shelves of machine carry out the front end degree of supercooling of electromagnetic valve for adjusting, and outlet superheat degree is adjusted by adjusting the aperture of electric expansion valve, with
And when the regulation of inner blower and electric expansion valve can not meet the demand of indoor wind pushing temperature, letter can be needed by being sent to outdoor unit
Number, the signal of indoor set is handled by outdoor unit, avoiding indoor set needs to control the situation of outdoor unit.
The control method of air-conditioning system according to embodiments of the present invention, when air-conditioning system receives constant temperature dehumidification instruction,
Judge whether to control air-conditioning system to remove into constant temperature by obtaining the temperature gap between indoor environment temperature and design temperature
Wet model, and after air-conditioning system enters constant temperature dehumidification pattern, the outlet temperature of heat exchanger and the front end mistake of magnetic valve after acquisition
Cold degree, then according to the wind shelves of the front end degree of supercooling regulation inner blower of magnetic valve, and according to the outlet temperature and electricity of rear heat exchanger
The aperture of the front end degree of supercooling regulation electric expansion valve of magnet valve, constant temperature dehumidification control is carried out so as to realize to air-conditioning system, can
Ensure while indoor temperature and humidity reaches demand to be not in frequent startup-shutdown, improve comfortableness, and ensure that air-conditioning system
Energy saving.
Also, in an embodiment of the present invention, additionally it is possible to which the indoor set with constant-temperature dehumidifying function is applied to multi-connected machine
System, solves the dehumidification of indoor set in the multiple on-line system of outer owner's control, avoiding indoor set needs to control outdoor unit
Situation.
In addition, embodiments of the invention also proposed a kind of air-conditioning system, it includes outdoor unit, indoor set and control mould
Block.As shown in figure 4, outdoor unit includes compressor 1, outdoor heat exchanger 2 and low-pressure liquid storing tank 7, indoor set includes the company of being sequentially connected in series
Electric expansion valve 3, preceding heat exchanger 4, magnetic valve 5 and the rear heat exchanger 6 connect, and the front end of electric expansion valve 3 also with outdoor unit
First end connection, the outlet of rear heat exchanger 6 is also connected with the second end of outdoor unit.
Control module is used for the temperature between acquisition indoor environment temperature and design temperature when receiving constant temperature dehumidification instruction
Difference △ Ts are spent, and temperature gap △ Ts are judged.Wherein, when temperature gap △ Ts are less than the first temperature threshold such as 4
When spending, control module control air-conditioning system enters constant temperature dehumidification pattern, and after acquisition heat exchanger 6 outlet temperature T2b and electromagnetism
The front end degree of supercooling SCm of valve 5, and the wind shelves according to the front end degree of supercooling SCm of magnetic valve 5 regulation inner blowers, and changed after
The outlet temperature T2b of hot device 6 and the front end degree of supercooling SCm regulation electric expansion valves 3 of magnetic valve 5 aperture.
Wherein, temperature gap △ Ts=indoor environment temperatures Troom- design temperature Ts, indoor environment temperature Troom can lead to
Cross and be disposed in the interior the temperature sensor of return air inlet position and detect to obtain, design temperature Ts can pass through the chain of command of air-conditioning system
Plate, remote control/line control machine etc. are set.
Also, rear heat exchanger 6 is that the outlet temperature T2b of evaporator can be by being arranged on the temperature-sensitive bag 11 of rear heat exchanger exit
Detection obtains.
According to one embodiment of present invention, control module can obtain the front end degree of supercooling of magnetic valve according to below equation：
SCm=T2a-Tm
Wherein, SCm is the front end degree of supercooling of magnetic valve, and T2a is the inlet temperature of preceding heat exchanger, and Tm is the front end of magnetic valve
Temperature.T2a can be obtained by the detection of temperature-sensitive bag 12 of heat exchanger entrance before being arranged on, and Tm can be by being arranged on the sense before magnetic valve
The detection of thermometer bulb 13 obtains.
In an embodiment of the present invention, when temperature gap is more than or equal to such as 4 degree of the first temperature threshold, control module
Control air-conditioning system enters refrigeration mode.
Specifically, control module first determines whether electricity when adjusting the wind shelves of inner blower according to the outlet temperature of rear heat exchanger
The front end degree of supercooling SCm of magnet valve 5；When the front end degree of supercooling SCm of magnetic valve 5 is less than such as 2 degree of the first default degree of supercooling, control
Module improves for example interior wind shelves+1 of wind shelves of inner blower；When the front end degree of supercooling SCm of magnetic valve 5 was preset more than or equal to second
During such as 8 degree of cold degree, control module reduces for example interior wind shelves -1 of wind shelves of inner blower, wherein, the second default degree of supercooling is more than the
One default degree of supercooling.
Also, control module is in the outlet temperature according to rear heat exchanger and the front end degree of supercooling regulation electronic expansion of magnetic valve
During the aperture of valve, when the front end degree of supercooling of the magnetic valve is more than or equal to the described first default degree of supercooling and less than described second
During default degree of supercooling, the outlet temperature of heat exchanger after control module judges；If the outlet temperature of rear heat exchanger is more than the second temperature
Such as 12 degree of threshold value is spent, the aperture that control module then reduces the electric expansion valve for example reduces 8pls；If rear heat exchanger
Outlet temperature is less than such as 2 degree of the 3rd temperature threshold, and the aperture that control module then increases electric expansion valve for example increases 8pls, its
In, second temperature threshold value is more than the 3rd temperature threshold.
In addition, the outlet temperature of heat exchanger is more than or equal to the 3rd temperature threshold and is less than or equal to institute when described after
When stating second temperature threshold value, the control module also judges current indoor environment temperature and the indoor ring before the first preset time
Difference between the temperature of border；If indoor environment temperature before the current indoor environment temperature and first preset time it
Between difference less than the 4th temperature threshold such as -1 spend, then to the outdoor unit send improve condensation temperature request；It is if described
The difference between indoor environment temperature before current indoor environment temperature and first preset time is more than or equal to described the
Four temperature thresholds, then keep the current aperture of the electric expansion valve constant, and keep the current wind shelves of the inner blower constant.
Specifically, when user selects constant temperature dehumidification pattern to start air-conditioning system, every 5 minutes detection design temperature Ts
With the difference between return air temperature Troom, if Troom-Ts >=4 degree, air-conditioning system is directly entered refrigeration mode operating, otherwise
Air-conditioning system enters constant temperature dehumidification pattern.Now, electric expansion valve 3 is first closed 500pls and opened again to 480pls, on magnetic valve 5
Electricity, inner blower turns low wind mode operation, after 5 minutes, detected T2a, Tm, T2b every 30 seconds, calculates the front end degree of supercooling of magnetic valve
SCm=T2a-Tm.And in indoor set running, if SCm is less than 2 degree, interior wind shelves+1；If SCm is more than or equal to 8
Spend, then interior wind shelves -1；When SCm is more than or equal to 2 degree and is less than 8 degree, if T2b is more than 12 degree, the aperture of electric expansion valve
Turn down 8pls；If T2b is less than 2 degree, the aperture increase 8pls of electric expansion valve.
Wherein, if the aperture of electric expansion valve reaches maximum, and electric expansion valve has out big demand, is sent out to outdoor unit
Send electronic expansion valve opening maximum mark (i.e. indoor-unit cooling-medium underfed)；If the aperture of electric expansion valve reaches most
It is small, and electric expansion valve has the demand turned down, then sends the minimum mark of electronic expansion valve opening to outdoor unit.And when T2b is big
When equal to 2 degree and less than or equal to 12 degree, if return air temperature of this detection less than last time detection 1 degree of return air temperature when,
The request heightened to outdoor unit transmission condensation temperature.Say, indoors during machine cold medium flux unreasonable distribution, outside machine sends electricity
Sub- expansion valve opening signal, and when return air temperature continues relatively low, indoor set can not meet constant temperature demand, be sent to outdoor unit
Signal can be needed, the signal of indoor set is handled by outdoor unit, avoiding indoor set needs to control the situation of outdoor unit.
Air-conditioning system according to embodiments of the present invention, control module is when receiving constant temperature dehumidification instruction, by obtaining room
Temperature gap between interior environment temperature and design temperature judges whether to control the air-conditioning system enter constant temperature dehumidification pattern, and
After air-conditioning system enters constant temperature dehumidification pattern, the front end of the outlet temperature of heat exchanger and magnetic valve supercooling after control module obtains
Degree, then according to the wind shelves of the front end degree of supercooling regulation inner blower of magnetic valve, and according to the outlet temperature and electromagnetism of rear heat exchanger
The aperture of the front end degree of supercooling regulation electric expansion valve of valve, so as to realize constant temperature dehumidification control, can ensure that indoor temperature and humidity reaches
Be not in frequent startup-shutdown while to demand, improve comfortableness, and ensure that energy saving.
Also, in the air-conditioning system of the embodiment of the present invention, additionally it is possible to by the indoor set application with constant-temperature dehumidifying function
In multiple on-line system, solves the dehumidification of indoor set in the multiple on-line system of outer owner's control, avoiding indoor set needs to control
The situation of outdoor unit processed.
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.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (12)
1. a kind of control method of air-conditioning system, the air-conditioning system includes outdoor unit and indoor set, it is characterised in that the room
Interior machine includes the electric expansion valve, preceding heat exchanger, magnetic valve and the rear heat exchanger that are sequentially connected in series, before the electric expansion valve
The first end also with the outdoor unit is held to be connected, the outlet of the rear heat exchanger is also connected with the second end of the outdoor unit, institute
Control method is stated to comprise the following steps：
When receiving constant temperature dehumidification instruction, the temperature gap between indoor environment temperature and design temperature is obtained, and to described
Temperature gap is judged；
When the temperature gap is less than the first temperature threshold, the air-conditioning system is controlled to enter constant temperature dehumidification pattern, and obtain
The outlet temperature of heat exchanger and the front end degree of supercooling of the magnetic valve after described；And
According to the wind shelves of the front end degree of supercooling of magnetic valve regulation inner blower, and according to the outlet temperature of heat exchanger after described and
The front end degree of supercooling of the magnetic valve adjusts the aperture of the electric expansion valve.
2. the control method of air-conditioning system according to claim 1, it is characterised in that when the temperature gap is more than or waits
When first temperature threshold, the air-conditioning system is controlled to enter refrigeration mode.
3. the control method of air-conditioning system according to claim 1, it is characterised in that the electricity is obtained according to below equation
The front end degree of supercooling of magnet valve：
SCm=T2a-Tm
Wherein, SCm is the front end degree of supercooling of the magnetic valve, and T2a is the inlet temperature of the preceding heat exchanger, and Tm is the electromagnetism
The head temperature of valve.
4. the control method of air-conditioning system according to claim 1, it is characterised in that according to the front end mistake of the magnetic valve
The wind shelves of cold degree regulation inner blower, are specifically included：
Judge the front end degree of supercooling of the magnetic valve；
When the front end degree of supercooling of the magnetic valve is less than the first default degree of supercooling, the wind shelves of the inner blower are improved；
When the front end degree of supercooling of the magnetic valve is more than or equal to the second default degree of supercooling, the wind shelves of the inner blower are reduced,
Wherein, the described second default degree of supercooling is more than the described first default degree of supercooling.
5. the control method of air-conditioning system according to claim 4, it is characterised in that according to the outlet of the rear heat exchanger
Temperature and the front end degree of supercooling of the magnetic valve adjust the aperture of the electric expansion valve, specifically include：
When the front end degree of supercooling of the magnetic valve is more than or equal to the described first default degree of supercooling and is preset less than described second
It is cold when spending, judge it is described after heat exchanger outlet temperature；
If the outlet temperature of heat exchanger is more than second temperature threshold value after described, reduce the aperture of the electric expansion valve；
If the outlet temperature of heat exchanger is less than the 3rd temperature threshold after described, increase the aperture of the electric expansion valve, its
In, the second temperature threshold value is more than the 3rd temperature threshold.
6. the control method of air-conditioning system according to claim 5, it is characterised in that the outlet temperature of heat exchanger when described after
When degree is more than or equal to the 3rd temperature threshold and is less than or equal to the second temperature threshold value, in addition to：
Judge the difference between the indoor environment temperature before current indoor environment temperature and the first preset time；
If the difference between indoor environment temperature before the current indoor environment temperature and first preset time is less than
4th temperature threshold, then sent to the outdoor unit and improve condensation temperature request；
If the difference between indoor environment temperature before the current indoor environment temperature and first preset time is more than
Or equal to the 4th temperature threshold, then keep the current aperture of the electric expansion valve constant, and keep the inner blower
Current wind shelves are constant.
A kind of 7. air-conditioning system, it is characterised in that including：
Outdoor unit；
Indoor set, the indoor set include electric expansion valve, preceding heat exchanger, magnetic valve and the rear heat exchanger being sequentially connected in series,
First end of the front end of the electric expansion valve also with the outdoor unit is connected, it is described after heat exchanger outlet also with the outdoor
The second end connection of machine；
Control module, the control module are obtained between indoor environment temperature and design temperature when receiving constant temperature dehumidification instruction
Temperature gap, and the temperature gap is judged, wherein,
When the temperature gap is less than the first temperature threshold, the control module controls the air-conditioning system to enter constant temperature dehumidification
Pattern, and the rear outlet temperature of heat exchanger and the front end degree of supercooling of the magnetic valve are obtained, and according to the magnetic valve
Front end degree of supercooling regulation inner blower wind shelves, and according to the outlet temperature of heat exchanger and the front end mistake of the magnetic valve after described
Cold degree adjusts the aperture of the electric expansion valve.
8. air-conditioning system according to claim 7, it is characterised in that when the temperature gap is more than or equal to described first
During temperature threshold, the control module controls the air-conditioning system to enter refrigeration mode.
9. air-conditioning system according to claim 7, it is characterised in that the control module is according to obtaining below equation
The front end degree of supercooling of magnetic valve：
SCm=T2a-Tm
Wherein, SCm is the front end degree of supercooling of the magnetic valve, and T2a is the inlet temperature of the preceding heat exchanger, and Tm is the electromagnetism
The head temperature of valve.
10. air-conditioning system according to claim 7, it is characterised in that the control module is according to the magnetic valve
During the wind shelves of front end degree of supercooling regulation inner blower,
Judge the front end degree of supercooling of the magnetic valve；
When the front end degree of supercooling of the magnetic valve is less than the first default degree of supercooling, the control module improves the inner blower
Wind shelves；
When the front end degree of supercooling of the magnetic valve is more than or equal to the second default degree of supercooling, the control module is reduced in described
The wind shelves of blower fan, wherein, the described second default degree of supercooling is more than the described first default degree of supercooling.
11. air-conditioning system according to claim 10, it is characterised in that the control module is according to the rear heat exchanger
Outlet temperature and the front end degree of supercooling of magnetic valve when adjusting the aperture of the electric expansion valve,
When the front end degree of supercooling of the magnetic valve is more than or equal to the described first default degree of supercooling and is preset less than described second
It is cold when spending, the control module judge it is described after heat exchanger outlet temperature；
If the outlet temperature of heat exchanger is more than second temperature threshold value after described, the control module then reduces the electronic expansion
The aperture of valve；
If the outlet temperature of heat exchanger is less than the 3rd temperature threshold after described, the control module then increases the electronic expansion
The aperture of valve, wherein, the second temperature threshold value is more than the 3rd temperature threshold.
12. air-conditioning system according to claim 11, it is characterised in that when described after the outlet temperature of heat exchanger be more than or
When equal to the 3rd temperature threshold and being less than or equal to the second temperature threshold value,
The control module is also judged between the indoor environment temperature before current indoor environment temperature and the first preset time
Difference；
If the difference between indoor environment temperature before the current indoor environment temperature and first preset time is less than
4th temperature threshold, then sent to the outdoor unit and improve condensation temperature request；
If the difference between indoor environment temperature before the current indoor environment temperature and first preset time is more than
Or equal to the 4th temperature threshold, then keep the current aperture of the electric expansion valve constant, and keep the inner blower
Current wind shelves are constant.
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| CN106247566A (en) * | 2016-09-18 | 2016-12-21 | 深圳广田智能科技有限公司 | Smart Home thermostatic control system and method |
| CN108489031B (en) * | 2018-03-20 | 2021-05-28 | 广东美的暖通设备有限公司 | Control method of air conditioning unit, air conditioning unit and storage medium |
| CN110529922B (en) * | 2019-08-29 | 2021-06-29 | 福建工程学院 | Single-cooling type temperature and humidity control multi-split air conditioning system and control method thereof |
| CN113739378B (en) * | 2020-05-29 | 2022-09-27 | 广东美的制冷设备有限公司 | Control method of air conditioning system, air conditioning system and storage medium |
| CN112524780B (en) * | 2020-12-09 | 2022-09-06 | 青岛海尔空调器有限总公司 | Control method and control device for air conditioner and air conditioner indoor unit |
| CN115077118B (en) * | 2022-06-10 | 2023-08-08 | 广东开利暖通空调股份有限公司 | Heat recovery multi-split air conditioning system and control method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101149168A (en) * | 2006-09-21 | 2008-03-26 | 海尔集团公司 | Temperature-fixing dehumidifying air conditioner and control method thereof |
| KR20080038511A (en) * | 2006-10-30 | 2008-05-07 | 엘지전자 주식회사 | Multi-type air conditioner |
| CN102032725A (en) * | 2010-12-08 | 2011-04-27 | 海尔集团公司 | Supercooling device, air conditioner with device and method for controlling refrigerant flow of air conditioner |
| CN103411341A (en) * | 2013-09-02 | 2013-11-27 | 海信（山东）空调有限公司 | Constant-temperature dehumidifying air conditioner and dehumidifying method |
| CN104110797A (en) * | 2014-07-25 | 2014-10-22 | 浙江新昌三瑞香雪冲业有限公司 | Constant-temperature dehumidification control method of air-conditioner |
| CN104251548A (en) * | 2013-06-28 | 2014-12-31 | 海尔集团公司 | Heat exchange system of single air conditioner as well as single air conditioner and control method thereof |
-
2015
- 2015-07-28 CN CN201510452061.6A patent/CN104990230B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101149168A (en) * | 2006-09-21 | 2008-03-26 | 海尔集团公司 | Temperature-fixing dehumidifying air conditioner and control method thereof |
| KR20080038511A (en) * | 2006-10-30 | 2008-05-07 | 엘지전자 주식회사 | Multi-type air conditioner |
| CN102032725A (en) * | 2010-12-08 | 2011-04-27 | 海尔集团公司 | Supercooling device, air conditioner with device and method for controlling refrigerant flow of air conditioner |
| CN104251548A (en) * | 2013-06-28 | 2014-12-31 | 海尔集团公司 | Heat exchange system of single air conditioner as well as single air conditioner and control method thereof |
| CN103411341A (en) * | 2013-09-02 | 2013-11-27 | 海信（山东）空调有限公司 | Constant-temperature dehumidifying air conditioner and dehumidifying method |
| CN104110797A (en) * | 2014-07-25 | 2014-10-22 | 浙江新昌三瑞香雪冲业有限公司 | Constant-temperature dehumidification control method of air-conditioner |
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