CN109163426B - Air conditioning control method, system and air-conditioning equipment based on volume switching - Google Patents
Air conditioning control method, system and air-conditioning equipment based on volume switching Download PDFInfo
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- CN109163426B CN109163426B CN201811099371.4A CN201811099371A CN109163426B CN 109163426 B CN109163426 B CN 109163426B CN 201811099371 A CN201811099371 A CN 201811099371A CN 109163426 B CN109163426 B CN 109163426B
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- defrost pattern
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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
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
- F24F11/67—Switching between heating and cooling modes
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
Abstract
The present invention relates to a kind of air conditioning control method, system and air-conditioning equipments based on volume switching, wherein control method includes: the operating mode information for obtaining air-conditioning；Judge whether the air-conditioning under heating mode will enter defrost pattern, if it is, the on-off valve being located between the transfiguration mouth (1A) of compressor (1) and reversal valve (11) is then first closed, then reversal valve (11) is made to switch to defrost pattern；After air-conditioning enters defrost pattern, judge whether defrost pattern terminates, if it is, reversal valve (11) is first made to switch to heating mode, then connects on-off valve.Such control method can avoid defrost process and affect to transfiguration mouth pressure, closed high pressure gas can make transfiguration mouth reach transfiguration pressure condition required for normal heating mode in a short time before, to guarantee that compressor stable operation in operating mode switching is influenced without being fluctuated by system pressure difference, system operation reliability is improved.
Description
Technical field
The present invention relates to air-conditioning technical field more particularly to it is a kind of based on volume switching air conditioning control method, system and
Air-conditioning equipment.
Background technique
Compared with common multi-connected machine, compressor is designed multi-connected machine based on the switching of size cylinder volume using size cylinder, and
Large cylinder can unload, and compressor twin-tub is run under middle high load capacity, and compressor single cylinder is run under underload.Pass through high and low piezoelectricity
Magnet valve changes compressor transfiguration mouth pressure and carries out single twin-tub switching, and transfiguration mouth leads to high pressure when high-pressure solenoid valve is opened, and compressor is double
Cylinder operation, transfiguration mouth leads to low pressure, the operation of compressor single cylinder when low-voltage solenoid valve is opened.
It finds in actual use, when unit is when twin-tub heating mode is run, into defrost pattern and defrost
After mode, system pressure difference has larger fluctuation, influences twin-tub operational reliability.
Summary of the invention
The purpose of the present invention is to propose to a kind of air conditioning control method, system and air-conditioning equipments based on volume switching, can
Improve the operation stability of air-conditioning system.
According to an aspect of the invention, it is proposed that a kind of air conditioning control method based on volume switching, comprising:
Obtain the operating mode information of air-conditioning；
Judge whether the air-conditioning under heating mode will enter defrost pattern, is located at compressor transfiguration if it is, first closing
On-off valve between mouth and reversal valve, then reversal valve is made to switch to defrost pattern；
After air-conditioning enters defrost pattern, judge whether defrost pattern terminates, if it is, reversal valve is first made to switch to system
Heat pattern, then connect on-off valve.
Further, when compressor is in the state that at least two cylinders are run simultaneously, being controlled on-off valve is high pressure on-off valve.
Further, in the case where air-conditioning will enter defrost pattern, after closing on-off valve, the first preset time of delay is again
Reversal valve is set to switch to defrost pattern.
Further, in the case where defrost pattern terminates heating mode to be entered, reversal valve is made to switch to heating mode
Afterwards, the second preset time of delay connects on-off valve again.
Further, in the case where defrost pattern terminates to need to enter heating mode, reversal valve is made to switch to heating mould
After formula, on-off valve is connected again when acquisition exhaust outlet of compressor reaches preset pressure value with the pressure difference of air entry.
According to another aspect of the invention, it is proposed that a kind of air-conditioner control system based on volume switching, comprising:
Pattern acquiring unit, for obtaining the operating mode information of air-conditioning；
Mode determination, for judging whether the air-conditioning under heating mode will enter defrost pattern or defrost pattern
Whether terminate；With
Control unit first closes when entering defrost pattern for air-conditioning in a heating mode and is located at compressor transfiguration mouth
The on-off valve between reversal valve, then reversal valve is made to switch to defrost pattern；And first make the Vavle switching that commutates after defrost pattern
To heating mode, then connect on-off valve.
Further, when compressor is in the state that at least two cylinders are run simultaneously, being controlled on-off valve is high pressure on-off valve.
It further, further include delay unit, for closing on-off valve in the case where air-conditioning will enter defrost pattern
Afterwards, the first preset time of delay makes reversal valve switch to defrost pattern again；And/or terminate heating mode to be entered in defrost pattern
In the case where, after so that reversal valve is switched to heating mode, the second preset time of delay connects on-off valve again.
Further, further includes:
Pressure difference acquiring unit, for making the Vavle switching that commutates in the case where defrost pattern terminates to need to enter heating mode
To heating mode, acquisition exhaust outlet of compressor reaches preset pressure value with the pressure difference of air entry and connects on-off valve again.
In accordance with a further aspect of the present invention, a kind of air-conditioning equipment is proposed, comprising:
Reversal valve is switched over for the operating mode to air-conditioning；
Compressor has transfiguration mouth, to carry out volume switching control by changing pressure；
On-off valve is located between the transfiguration mouth of compressor and reversal valve；And
The air-conditioner control system based on volume switching of the various embodiments described above.
Further, compressor has twin-tub, and on-off valve includes high pressure on-off valve and low pressure on-off valve, and air-conditioning equipment also wraps
Low pressure varactor and high pressure varactor are included,
Low pressure varactor is equipped with low pressure on-off valve, and first end is connected to transfiguration mouth, second end and reversal valve and compressor
Air entry connection；
High pressure varactor is equipped with high pressure on-off valve, and first end is connected to transfiguration mouth, second end and reversal valve and compressor
Exhaust outlet connection.
Further, it is respectively equipped with low pressure detection part and high pressure detection part on the air intake duct and exhaust pipe of compressor,
To obtain the pressure difference of exhaust outlet of compressor and air entry.
Based on the above-mentioned technical proposal, the air conditioning control method based on volume switching of the embodiment of the present invention, can be in air-conditioning
When needing to enter defrost pattern from heating mode, first closes and be located at on-off valve between compressor transfiguration mouth and reversal valve, to become
Rong Guanzhong closes one section of gas, then reversal valve is made to switch to defrost pattern, and at this moment the connection in high-low pressure pipe section will not be to transfiguration
The pressure of mouth impacts；After defrost pattern, reversal valve is first set to switch to heating mode, then connect on-off valve, in this way
Closed gas can make transfiguration mouth reach transfiguration pressure condition required for normal heating mode in a short time before, to guarantee
Compressor stable operation when operating mode switches is influenced without being fluctuated by system pressure difference, improves system operation reliability.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram of one embodiment of air-conditioning of the present invention；
Fig. 2 is the flow diagram of one embodiment of air conditioning control method of the present invention；
Fig. 3 is the module composition schematic diagram of one embodiment of air-conditioner control system of the present invention.
Specific embodiment
The present invention described further below.In the following paragraphs, the different aspect of embodiment is defined in more detail.So
The various aspects of restriction can be combined with any other one aspect or many aspects, can not be combined unless explicitly stated otherwise.Especially,
It is considered as preferred or advantageous any feature can be considered as preferred or advantageous feature group with other one or more
It closes.
The terms descriptions merely for convenience such as " first " that occurs in the present invention, " second " have same names to distinguish
Different building blocks, be not offered as successively or primary-slave relation.
Inventors have found that unit in the prior art terminates when twin-tub heating mode is run into defrost and defrost
Afterwards, the commutation of four-way valve, which will lead to system pressure difference, larger fluctuation, influences twin-tub operational reliability, and system pressure difference refers to compressor
Pressure difference between exhaust outlet and air entry.The reason is that the direct action when being switched to defrost pattern by four-way valve commutation,
High-low pressure pipe section before system can be connected, and the mixing of high-low pressure refrigerant reduces system pressure difference instantaneously, lead to transfiguration mouth pressure
Power fluctuates, and hereafter will start against high-low pressure pipe section new under defrost pattern.Terminate to need to reenter in defrost
When twin-tub heating mode, transfiguration mouth needs logical high pressure, but since four-way valve commutation causes the pressure at compressor air-discharging end in section
It is difficult to condition of high voltage needed for reaching twin-tub operation in time, therefore will affect twin-tub reliability of operation and stability.
Therefore, in order to guarantee compressor operational reliability, need to reduce system pressure difference fluctuation.According to this thinking, this hair
It is bright to provide a kind of air conditioning control method based on volume switching, in a schematical embodiment, air-conditioning as shown in Figure 1
Schematic diagram and control method flow diagram shown in Fig. 2, comprising:
Step 101, the operating mode information for obtaining air-conditioning, operating mode includes heating mode and defrost pattern；
Step 102 judges whether the air-conditioning under heating mode will enter defrost pattern, if so, thening follow the steps 103；
Wherein, in a heating mode, evaporator is as outdoor unit 3, and condenser is as indoor unit 2；Under defrost pattern, pass through reversal valve
11 switching makes evaporator as indoor unit 2, and condenser is as outdoor unit 3.
Step 103 first closes the on-off valve being located between the transfiguration mouth 1A of compressor 1 and reversal valve 11, then makes reversal valve
11 switch to defrost pattern, and transfiguration mouth 1A is for high pressure or low-pressure gaseous refrigerant needed for being passed through 1 transfiguration of compressor, reversal valve 11
It can be four-way valve etc., on-off valve can be solenoid valve etc.；
Step 104, after air-conditioning enters defrost pattern, judge whether defrost pattern terminates, if so, thening follow the steps
105；
Step 105 first makes reversal valve 11 switch to heating mode, then connects on-off valve, to enter normal heating mode.
The control method of this embodiment of the invention can first be closed when air-conditioning needs to enter defrost pattern from heating mode
On-off valve makes reversal valve 11 switch to defrost pattern again, and the closing of on-off valve can close one section of gas, varactor in varactor
For the pipeline section being connected to the transfiguration mouth 1A of compressor 1, hereafter the switching of reversal valve 11 makes the connection in high-low pressure pipe section all will not
The pressure of transfiguration mouth 1A is impacted.After defrost pattern, reversal valve 11 is first made to switch to heating mode, then connected logical
Disconnected valve can avoid defrost process in this way and affect to transfiguration mouth 1A pressure, and closed gas can make transfiguration mouth 1A short before
Reach transfiguration pressure condition required for normal heating mode in time, to guarantee that compressor 1 is stablized in operating mode switching
Operation is influenced without being fluctuated by system pressure difference, improves system operation reliability.
Compressor 1 of the invention is frequency conversion positive displacement compressor 1, has more than two cylinders, and each cylinder can be isometric(al)
Cylinder is also possible to the not exactly the same cylinder of volume.Such as duplex cylinder compressor 1, two cylinders can be isometric(al) cylinder or big
Small cylinder.
In some embodiments, compressor 1 has more than two cylinders, when to switch to swept volume larger for compressor 1, i.e.,
It when in the state that at least two cylinders are run simultaneously, needs to be passed through high pressure gas to transfiguration mouth 1A, it is logical for high pressure to be controlled on-off valve
Disconnected valve 7.
Since system is when defrost terminates to need to reenter twin-tub heating mode, transfiguration mouth 1A needs logical high pressure, still
Since the commutation of reversal valve 11 causes the pressure of 1 exhaust end of compressor to be difficult to reach at least two cylinders within the section time while running
Required condition of high voltage, therefore the present invention first closes high pressure on-off valve 7 when entering defrost pattern and can make to close one in varactor
Section high pressure gas, to make transfiguration mouth 1A reach transfiguration pressure required for normal heating mode in a short time after defrost
Power condition.Such mode for making transfiguration mouth 1A keep high pressure, it is outstanding for the reliability effect for improving twin-tub or multi-cylinder heating operation
It is obvious.
In some embodiments, in the case where air-conditioning will enter defrost pattern, after closing on-off valve, delay first is default
Time makes reversal valve 11 switch to defrost pattern again.The embodiment can guarantee on-off valve after closing on-off valve, through delay
It is reliable to close, when twin-tub or multi-cylinder are run simultaneously, make to close one section of high pressure gas in varactor, while easy to control.
In some embodiments, in the case where defrost pattern terminates heating mode to be entered, switch to reversal valve 11
After heating mode, the second preset time of delay connects on-off valve again.
Or in further embodiments, in the case where defrost pattern terminates to need to enter heating mode, make reversal valve
After 11 switch to heating mode, connected again when acquisition 1 exhaust outlet 1C of compressor reaches preset pressure value with the pressure difference of air entry 1B
On-off valve.
The embodiment is when twin-tub or multi-cylinder are run simultaneously, after reversal valve 11 switches to heating mode, by delay or
Detection system pressure difference, it is ensured that the pressure of 1 exhaust outlet 1C of compressor reaches high-voltage value required for normal heating mode, so that
Stable pressure difference is set up in the high-low pressure pipe being connected to compressor 1 exhaust outlet 1C and air entry 1B, then connects on-off valve again
When, pressure in the pressure and varactor in 1 exhaust pipe of compressor can be made to keep close, thus in 1 exhaust pipe of compressor and
Reduce pressure oscillation when gas mixing in varactor, prevents the pressure reduction in varactor, make system reliability service.
The first preset time, the second preset time and the preset pressure value mentioned in above-described embodiment can be definite value,
It can be changed according to factors such as the different operation occasion of unit, unit capacity sizes, different operation occasions refers to different fortune
Under row operating condition, the height pressure difference that system needs to establish is also different.
Control method of the invention is mainly used for heating mode, and reversal valve 11 will not act in cooling mode, normal to transport
During row will not there is a situation where pressure difference cataclysms, thus such control method is not suitable for refrigeration mode.
By taking twin-tub heating operation as an example, in conjunction with Fig. 1, the working principle of air-conditioner set of the present invention is provided.
The main circulation loop of air-conditioning equipment is equipped with indoor unit 2, outdoor unit 3 and compressor 1, and Fig. 1 is in for air-conditioning equipment
The status diagram of defrost pattern, at this time indoor unit 2 be evaporator, outdoor unit 3 be condenser, compressor 1 have transfiguration mouth 1A,
Air entry 1B and exhaust outlet 1C, exhaust outlet 1C are connected to after passing through oil eliminator 5 and reversal valve 11 with outdoor unit 3, oil eliminator 5
Oil return pipe is connected to the air entry 1B of compressor 1；Air entry 1B is connected to by gas-liquid separator 4 and reversal valve 11 with indoor unit 2.
First throttle element 17 and board-like is successively arranged along refrigerant flow direction on main circulation loop between outdoor unit 3 and indoor unit 2
Heat exchanger 18；Transfiguration mouth 1A can carry out volume switching control by changing pressure.
Wherein, first throttle element 17 can be electric expansion valve or restricting element, for that will reduce gaseous coolant condensation
Pressure afterwards, in heating mode from throttling action, standard-sized sheet when refrigeration mode.First import of plate heat exchanger 18 and first segment
Fluid element 17 is connected to, and first outlet is connected to the inlet of indoor unit 2, and the second import is connected to the air intake duct of compressor 1, specifically
It is connected between the air inlet of gas-liquid separator 4 and reversal valve 11, second outlet is led back by the second restricting element 19 to board-like
On pipeline between the first import and first throttle element 17 of heat exchanger 18, it can thus make that 1 air entry 1B's of compressor is low
Warm low-pressure gaseous refrigerant carries out heat exchange with the low-pressure liquid refrigerant after first throttle element 17, to improve low-pressure liquid
The degree of supercooling of refrigerant improves system energy efficiency.In settable second restricting element 19 of the second outlet of plate heat exchanger 18, such as electricity
Sub- expansion valve or restricting element, to control the degree of supercooling of liquid refrigerants by adjusting aperture.
Under defrost pattern shown in Fig. 1, the high pressure gaseous refrigerant being discharged from 1 exhaust outlet 1C of compressor is by lubricating oil
Enter after separation as condensing heat-exchange is carried out in the outdoor unit 3 of condenser to realize defrost, lubricating oil can be with the gas of low-temp low-pressure
State refrigerant returns in compressor 1 from air entry 1B.Liquid refrigerants is formed after high pressure gaseous refrigerant condensing heat-exchange, by
Enter plate heat exchanger 18 after the decompression of one restricting element 17 to be subcooled, the low-temp low-pressure liquid refrigerants after supercooling enters the room machine
Heat exchange is evaporated in 2, the gaseous coolant formed after evaporation enters the air entry 1B of compressor 1 after gas-liquid separation.
The compressor 1 is the transfiguration frequency-changeable compressor of twin-tub, and on-off valve includes high pressure on-off valve 7 and low pressure on-off valve 6, sky
Adjusting equipment further includes low pressure varactor and high pressure varactor.Low pressure varactor is equipped with low pressure on-off valve 6, first end and transfiguration mouth
1A connection, second end are connected to the air entry 1B of reversal valve 11 and compressor 1；High pressure varactor is equipped with high pressure on-off valve 7, the
One end is connected to transfiguration mouth 1A, and second end is connected to the exhaust outlet 1C of reversal valve 11 and compressor 1.In single cylinder operation, low pressure
On-off valve 6 is opened, and high pressure on-off valve 7 is closed；When twin-tub is run simultaneously, low pressure on-off valve 6 is closed, and high pressure on-off valve 7 is opened.
The setting position of low pressure on-off valve 6 and high pressure on-off valve 7 can arrange that setting position is best according to the specific pipeline space structure of unit
Convenient for assembly and maintenance.
Control method of the invention is particularly important when compressor twin-tub is run.In 1 twin-tub heating operation of compressor, sentence
Whether disconnected air-conditioning will enter defrost pattern, if it is first close and set high pressure on-off valve 7, and postpone the first preset time, at this time
Low pressure on-off valve 6 and high pressure on-off valve 7 are turned off, the transfiguration between transfiguration mouth 1A and low pressure on-off valve 6 and high pressure on-off valve 7
One section of high pressure gas is closed in pipe, then reversal valve 11 is made to switch to defrost pattern.After air-conditioning enters defrost pattern, defrost is judged
Whether mode terminates, and if it is reversal valve 11 is first made to switch to heating mode, is postponing the second preset time or system pressure
After difference reaches preset pressure value, then high pressure on-off valve 7 is connected, so that system enters normal heating mode.The item for needing to meet
Part is that high pressure on-off valve 7 is opened and the high pressure refrigerant gas in guarantee system is passed into the transfiguration mouth 1A of compressor 1.
Since air-conditioning is when needing to defrost, due to the switching operation of reversal valve 11, it will lead to system and entering and exiting
Pressure difference when white mode between air intake duct and exhaust pipe can instantaneously reduce, this would necessarily affect the steady of 1 twin-tub of compressor operation
It is qualitative, by first closed in defrost high pressure on-off valve can maintain compressor 1 transfiguration mouth 1A pressure not by system pressure difference
The influence of fluctuation.
Optionally, it is respectively equipped with low pressure detection part 8 and high pressure detection part 9 on the air intake duct and exhaust pipe of compressor 1,
To obtain the pressure difference of 1 exhaust outlet 1C and air entry 1B of compressor, to judge that terminating reversal valve 11 in defrost switches to system
The opening opportunity of high pressure on-off valve 7 after heat pattern.For example, low pressure detection part 8 and high pressure detection part 9 can make pressure sensing
Device etc..Specifically, low pressure detection part 8 may be provided between 1 air entry 1B of compressor and the gas outlet of gas-liquid separator 4, high pressure
Detection part 9 may be provided between the gas outlet of oil eliminator 5 and reversal valve 11.Certainly, the pressure value detected air-conditioning its
It may also be used in controlling.
Optionally, high-voltage switch gear 10 can be also equipped on the exhaust pipe of compressor 1 specifically may be provided in the row of compressor 1
Between port 1C and oil eliminator 5, stoppage protection can be played the role of when exhaust lateral pressure is excessive.
Optionally, oil return capillary 13 and solenoid valve 14 can be arranged in parallel on the oil return pipe of compressor 1, solenoid valve 14 exists
Oil return mode or while needing differential pressure reducing, can open, to guarantee smooth oil return.In order to guarantee the clean level of oil return, reduce lubrication
Impurity in oil impacts compressor 1, in oil eliminator 5 and oil return capillary 13 and the also settable filter of solenoid valve 14
12。
Optionally, it may also set up in the downstream of 18 first outlet of the upstream of first throttle element 17 and/or plate heat exchanger
Filter 12 prevents impurity from impacting to the operation of compressor 1 to filter out the impurity in refrigerant.
Optionally, tracheae valve 16 and liquid pipe valve 15, liquid pipe valve are respectively equipped on the tracheae of outdoor unit 3 and liquid pipe
15 may be provided in the downstream of 18 first outlet of plate heat exchanger, and also settable between liquid pipe valve 15 and plate heat exchanger 18
Filter 12.In a pre-installation, tracheae valve 16 and liquid pipe valve 15 are in close state outdoor unit 3, are opened and are protected after being installed
The connection for demonstrate,proving system circuit needs movement or turns off when dismounting outdoor unit 3 again.
It further include the air-conditioner control system based on volume switching in air-conditioning equipment of the invention, in some embodiments,
It include: pattern acquiring unit 10, for obtaining the operating mode information of air-conditioning；Mode determination 20, for judging heating mould
Whether the air-conditioning under formula will enter whether defrost pattern or defrost pattern terminate；With control unit 30, it is used in heating mode
Under air-conditioning first close when entering defrost pattern and be located at on-off valve between the transfiguration mouth 1A of compressor 1 and reversal valve 11, then make
Reversal valve 11 switches to defrost pattern；And reversal valve 11 is first set to switch to heating mode after defrost pattern, then connect logical
Disconnected valve.
In some embodiments, when compressor 1 is in the state that at least two cylinders are run simultaneously, being controlled on-off valve is high pressure
On-off valve 7.
In some embodiments, which further includes delay unit 40, for enter defrost pattern in air-conditioning
In the case of, after closing on-off valve, the first preset time of delay makes reversal valve 11 switch to defrost pattern again；And/or in defrost mould
In the case that formula terminates heating mode to be entered, after so that reversal valve 11 is switched to heating mode, the second preset time of delay connects again
Logical on-off valve.
In some embodiments, which further includes pressure difference acquiring unit 50, for terminating to need in defrost pattern
In the case where heating mode, after so that reversal valve 11 is switched to heating mode, compressor 1 exhaust outlet 1C and air entry 1B is obtained
Pressure difference reach preset pressure value and connect on-off valve again.
A kind of air conditioning control method based on volume switching provided by the present invention, system and air-conditioning equipment are carried out above
It is discussed in detail.Principle and implementation of the present invention are described for specific embodiment used herein, the above reality
The explanation for applying example is merely used to help understand method and its core concept of the invention.It should be pointed out that for the art
For those of ordinary skill, without departing from the principle of the present invention, can with several improvements and modifications are made to the present invention,
These improvements and modifications also fall within the scope of protection of the claims of the present invention.
Claims (12)
1. a kind of air conditioning control method based on volume switching, comprising:
Obtain the operating mode information of air-conditioning；
Judge whether the air-conditioning under heating mode will enter defrost pattern, if it is, first closing the transfiguration for being located at compressor (1)
On-off valve between mouth (1A) and reversal valve (11), then the reversal valve (11) is made to switch to defrost pattern；
After air-conditioning enters defrost pattern, judge whether defrost pattern terminates, which is characterized in that if defrost pattern terminates,
So that the reversal valve (11) is switched to heating mode, then connects the on-off valve.
2. the air conditioning control method according to claim 1 based on volume switching, which is characterized in that the compressor (1)
When in the state that at least two cylinders are run simultaneously, being controlled on-off valve is high pressure on-off valve (7).
3. the air conditioning control method according to claim 1 based on volume switching, which is characterized in that enter in air-conditioning and change
In the case where white mode, after closing the on-off valve, the first preset time of delay makes reversal valve (11) switch to defrost pattern again.
4. the air conditioning control method according to claim 1 based on volume switching, which is characterized in that terminate in defrost pattern
In the case where entering heating mode, after so that reversal valve (11) is switched to heating mode, the second preset time of delay connects institute again
State on-off valve.
5. the air conditioning control method according to claim 1 based on volume switching, which is characterized in that terminate in defrost pattern
In the case where needing to enter heating mode, after so that reversal valve (11) is switched to heating mode, as the row for obtaining the compressor (1)
Port (1C) reaches preset pressure value with the pressure difference of air entry (1B) and connects the on-off valve again.
6. a kind of air-conditioner control system based on volume switching, comprising:
Pattern acquiring unit (10), for obtaining the operating mode information of air-conditioning；
Mode determination (20), for judging whether the air-conditioning under heating mode will enter defrost pattern or defrost pattern
Whether terminate；With
Control unit (30) first closes when entering defrost pattern for air-conditioning in a heating mode and is located at compressor (1)
On-off valve between transfiguration mouth (1A) and reversal valve (11), then the reversal valve (11) is made to switch to defrost pattern；It is characterized in that,
Described control unit (30) is also used to that the reversal valve (11) is first made to switch to heating mode after defrost pattern, then connects
The on-off valve.
7. the air-conditioner control system according to claim 6 based on volume switching, which is characterized in that the compressor (1)
When in the state that at least two cylinders are run simultaneously, being controlled on-off valve is high pressure on-off valve (7).
8. the air-conditioner control system according to claim 6 based on volume switching, which is characterized in that further include:
Delay unit (40), in the case where air-conditioning will enter defrost pattern, after closing the on-off valve, delay first to be pre-
If the time makes reversal valve (11) switch to defrost pattern again；And/or in the case where defrost pattern terminates heating mode to be entered,
After so that reversal valve (11) is switched to heating mode, the second preset time of delay connects the on-off valve again.
9. the air-conditioner control system according to claim 6 based on volume switching, which is characterized in that further include:
Pressure difference acquiring unit (50), for making reversal valve (11) in the case where defrost pattern terminates to need to enter heating mode
After switching to heating mode, the pressure difference of the exhaust outlet (1C) and air entry (1B) that obtain the compressor (1) reaches preset pressure
Value connects the on-off valve again.
10. a kind of air-conditioning equipment characterized by comprising
Reversal valve (11), switches over for the operating mode to air-conditioning；
Compressor (1) has transfiguration mouth (1A), to carry out volume switching control by changing pressure；
On-off valve is located between the transfiguration mouth (1A) of the compressor (1) and the reversal valve (11)；And
Any air-conditioner control system based on volume switching of claim 6~9.
11. air-conditioning equipment according to claim 10, which is characterized in that the compressor (1) has twin-tub, the on-off
Valve includes high pressure on-off valve (7) and low pressure on-off valve (6), and the air-conditioning equipment further includes low pressure varactor and high pressure varactor,
The low pressure varactor is equipped with the low pressure on-off valve (6), and first end is connected to the transfiguration mouth (1A), second end and
The reversal valve (11) is connected to the air entry (1B) of compressor (1)；
The high pressure varactor is equipped with the high pressure on-off valve (7), and first end is connected to the transfiguration mouth (1A), second end and
The reversal valve (11) is connected to the exhaust outlet (1C) of compressor (1).
12. air-conditioning equipment according to claim 10, which is characterized in that the air intake duct and exhaust pipe of the compressor (1)
On be respectively equipped with low pressure detection part (8) and high pressure detection part (9), to obtain the exhaust outlet (1C) of the compressor (1)
With the pressure difference of air entry (1B).
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| CN201811099371.4A CN109163426B (en) | 2018-09-20 | 2018-09-20 | Air conditioning control method, system and air-conditioning equipment based on volume switching |
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| CN201811099371.4A CN109163426B (en) | 2018-09-20 | 2018-09-20 | Air conditioning control method, system and air-conditioning equipment based on volume switching |
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| CN109163426B true CN109163426B (en) | 2019-07-02 |
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| CN110486891B (en) * | 2019-08-22 | 2021-04-23 | 海信（山东）空调有限公司 | Defrosting control method and air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2006162240A (en) * | 2004-11-10 | 2006-06-22 | Daikin Ind Ltd | Refrigerating device |
| JP2007298218A (en) * | 2006-04-28 | 2007-11-15 | Daikin Ind Ltd | Refrigerating device |
| CN101995110B (en) * | 2010-10-29 | 2013-03-27 | 广东美的电器股份有限公司 | Control method of double-cylinder variable-capacity compressor air conditioning system |
| CN103968460A (en) * | 2014-05-16 | 2014-08-06 | 珠海格力电器股份有限公司 | Air conditioning system |
| CN204329388U (en) * | 2014-12-02 | 2015-05-13 | 广东美的制冷设备有限公司 | Air-conditioner |
| CN105674647B (en) * | 2016-03-21 | 2018-02-13 | 珠海格力电器股份有限公司 | Positive displacement compressor system defrosting control method |
| CN205641256U (en) * | 2016-04-29 | 2016-10-12 | 广东美的制冷设备有限公司 | Heating and cooling air conditioner |
| CN106152342B (en) * | 2016-07-04 | 2020-12-04 | 珠海格力电器股份有限公司 | Variable-displacement-ratio two-stage compression air conditioning system and control method thereof |
| CN106403068A (en) * | 2016-09-19 | 2017-02-15 | 广东美的制冷设备有限公司 | Defrosting system and defrosting method of air conditioner, air conditioner and air conditioner control method |
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