CN108931068A - Air-conditioning system, heating dehumanization method, heating method and refrigerating method - Google Patents
Air-conditioning system, heating dehumanization method, heating method and refrigerating method Download PDFInfo
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- CN108931068A CN108931068A CN201710369686.5A CN201710369686A CN108931068A CN 108931068 A CN108931068 A CN 108931068A CN 201710369686 A CN201710369686 A CN 201710369686A CN 108931068 A CN108931068 A CN 108931068A
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- Prior art keywords
- valve
- air
- interface
- conditioning system
- way valve
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
- F25B41/26—Disposition of valves, e.g. of on-off valves or flow control valves of fluid flow reversing valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
Abstract
The present invention provides a kind of air-conditioning system, heating dehumanization method, heating method and refrigerating methods.Wherein, air-conditioning system includes：Compressor, four-way valve, outdoor heat exchanger, the first electric expansion valve, the first indoor heat exchanger, the second electric expansion valve and the second indoor heat exchanger being sequentially communicated；First interface is connected to the outlet end of compressor；Second interface is connected to the outdoor heat exchanger port of outdoor heat exchanger；Third interface is connected to the arrival end of compressor；4th interface is connected to the indoor heat exchanger port of the second indoor heat exchanger, wherein, air-conditioning system includes the first and second operating modes, when air-conditioning system is in the first operating mode, first interface is connected to second interface, third interface and the 4th orifice, when air-conditioning system is in the second operating mode, first interface and the 4th orifice, second interface and third orifice.The problem of poor user experience that can efficiently solve air conditioner in the prior art that applies the technical scheme of the present invention.
Description
Technical field
The present invention relates to appliance field, in particular to a kind of air-conditioning system, heating dehumanization method, heating method and
Refrigerating method.
Background technique
As shown in Figure 1, current domestic variable frequency air-conditioning system generally by compressor 1, four-way valve 2, outdoor heat exchanger 3,
Electric expansion valve 4, indoor heat exchanger composition.Southern region of China is generally moister, and when winter will appear clammy phenomenon,
Therefore need air-conditioning with the function of dehumidifying.When winter dehumidifying, four-way valve 2 commutates, so that air-conditioning system is cut by heating state
It is changed to refrigerating state, indoor heat exchanger is equivalent to evaporator, extraneous steam (temperature is higher than evaporator temperature) and steaming at this time
Device contact is sent out, condenses into small water droplet to the cold, thus the moisture of removal within doors.But during above-mentioned removal moisture, due to
Air-conditioning system is switched to refrigerating state, therefore inner temperature of room can be caused to reduce, poor user experience to cold wind is blowed within doors.In order to
It solves the above problems, as shown in Figure 1, indoor heat exchanger is generally divided into two, respectively the first Indoor Thermal in the prior art
Exchanger 5 and the second indoor heat exchanger 6, and solenoid valve 7 is set between two indoor heat exchangers.It is empty when dehumidifying
Adjusting system is switched to refrigerating state, expansion valve standard-sized sheet.At this point, the first indoor heat exchanger 5 is identical as outdoor heat exchanger 3 homogeneous
When in condenser.Solenoid valve throttles to the refrigerant after flowing through the first indoor heat exchanger 5.After reducing pressure by regulating flow, the steaming of refrigerant
Hair point reduces, and evaporates in the second indoor heat exchanger 6, therefore the second indoor heat exchanger 6 is equivalent to evaporator.Above structure
So that the blower in air conditioner blows to the first high indoor heat exchanger 5 of temperature, to guarantee the temperature of the wind of blowout, improve user
Experience, and indoor moisture will be contacted with the second indoor heat exchanger 6, condense into small water droplet to the cold, to play dehumidifying
Effect.
When needing to dehumidify, air-conditioning system is switched to refrigerating state from heating, and solenoid valve needs to close.Due to solenoid valve
Refrigerant inlet and the pressure of refrigerant exit are in a basic balance, almost without pressure difference, after the coil of solenoid valve is powered, and the electromagnetic force of coil
Solenoid valve can be made to close, dehumidified.But after dehumidifying operating, when being switched to heating state.Due to refrigerant inlet and
The pressure difference of refrigerant exit becomes larger, coil blackout, only piston reply can not be allowed (can not to return back to solenoid valve by the elastic force of spring
The state of standard-sized sheet).Therefore, it in order to guarantee that solenoid valve is allowed hand over to full-gear, needs to shut down before being switched to heating state
Compressor allows refrigerant inlet and the pressure difference of refrigerant exit to reduce.After pressure difference reaches the pressure differential range that piston can be made to reply
Solenoid valve is allowed to switch to full-gear again.But more electric power will be consumed by shutting down compressor, cause energy consumption higher, waste energy
Source.
In addition, refrigerant enters from the vertical tube of solenoid valve when needing to heat, solenoid valve is only capable of in normally opened state, this
When, the first indoor heat exchanger 5 will be flowed into without crushing by flowing out the refrigerant in the second indoor heat exchanger 6, therefore air conditioner is blown
The temperature of wind out is identical.For the user that interior there are different needs, respective requirement may be can not meet, so that
The usage experience of user is poor.
Summary of the invention
The main purpose of the present invention is to provide a kind of air-conditioning system, dehumanization method, heating method and refrigerating method are heated,
To solve the problems, such as the poor user experience of air conditioner in the prior art.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of air-conditioning system, including：Successively connect
Lead to and formed compressor, four-way valve, outdoor heat exchanger, the first electric expansion valve, the first indoor heat exchanger, second of circulation loop
Electric expansion valve and the second indoor heat exchanger；The first interface of four-way valve is connected with the outlet end of compressor；Four-way valve
Second interface is connected with the outdoor heat exchanger port of outdoor heat exchanger；The arrival end phase of the third interface of four-way valve and compressor
Connection；4th interface of four-way valve is connected with the indoor heat exchanger port of the second indoor heat exchanger, wherein air-conditioning system includes
First operating mode and the second operating mode, when air-conditioning system is in the first operating mode, first interface and second interface connect
It is logical, and third interface and the 4th orifice, when air-conditioning system is in the second operating mode, first interface and the 4th interface connect
It is logical, and second interface and third orifice.
Further, the second electric expansion valve includes：Valve body has the first valve port；Needle has and abuts with the first valve port
The first closed position and avoid the first open position of the first valve port, the bottom of needle has the be connected to the first valve port
Two valve ports, have the first flow channels being connected to the second valve port on needle, and the entrance of the first flow channels is located at the side of needle
On wall；Valve rod, is at least partly threaded through the inside of needle, and valve rod can be moved up and down to adjust the flow at the second valve port；It drives
Dynamic portion, driving stem move up and down, wherein backstopping assembly are provided between valve rod and needle, so that needle and valve rod pass through only
Moved synchronously both when keeping off component contact, and when needle is located at the first closed position, valve rod can be relative to needle above and below
Movement.
Further, the bottom of needle also has communicating passage, and communicating passage is located at the outer circumferential of the second valve port and company
Logical first flow channels and the first valve port.
Further, the second electric expansion valve further includes：Bellows is set in the outside of valve rod, the separate valve of bellows
One end of needle is connected to one end of the close driving portion of valve body, and the opposite other end of bellows is connected on valve rod.
Further, the second electric expansion valve further includes：Noise-reducing structure is arranged in needle, into the fluid in needle
Needle is flowed out after noise-reducing structure noise reduction.
According to another aspect of the present invention, a kind of heating dehumidification control method of air-conditioning system is provided, air-conditioning system is
Above-mentioned air-conditioning system, control method include：Control air-conditioning system four-way valve so that four-way valve first interface and four-way valve
Second interface connection, the third interface of four-way valve and the 4th orifice of four-way valve；Second electronic expansion of air-conditioning system
The second flow state that there is valve first flow state and flow to be less than first flow state, the second electric expansion valve of control so that
Second electric expansion valve is in second flow state.
According to another aspect of the present invention, a kind of heating dehumidification control method of air-conditioning system is provided, air-conditioning system is
Above-mentioned air-conditioning system, control method include：Control air-conditioning system four-way valve so that four-way valve first interface and four-way valve
Second interface connection, the third interface of four-way valve and the 4th orifice of four-way valve；Control the second electronics of air-conditioning system
The driving portion of expansion valve, so that the valve rod of the second electric expansion valve is moved to the second closed position, wherein when valve rod is located at second
When closed position, needle is located at the first closed position, and valve rod blocks the second valve port.
According to another aspect of the present invention, a kind of heat-production control method of air-conditioning system is provided, air-conditioning system is above-mentioned
Air-conditioning system, control method includes：Control the four-way valve of air-conditioning system so that four-way valve first interface and four-way valve the
Four orifices, the second interface of four-way valve and the third orifice of four-way valve；Second electric expansion valve of air-conditioning system has
There are first flow state and flow to be less than the second flow state of first flow state, controls the second electric expansion valve so that second
Electric expansion valve is in second flow state.
According to another aspect of the present invention, a kind of heat-production control method of air-conditioning system is provided, air-conditioning system is above-mentioned
Air-conditioning system, control method includes：Control the four-way valve of air-conditioning system so that four-way valve first interface and four-way valve the
Four orifices, the second interface of four-way valve and the third orifice of four-way valve；Control the second electronic expansion of air-conditioning system
The driving portion of valve, so that the valve rod of the second electric expansion valve is under the driving of driving portion in the second open position and the second close stance
It is moved between setting, wherein when valve rod is located at the second open position, the needle of the second electric expansion valve is located at the first close stance
It sets, valve rod avoids the second valve port of the second electric expansion valve, and needle and valve rod pass through the stopper section of the second electric expansion valve
Part contact, when valve rod is located at the second closed position, needle is located at the first closed position, and valve rod blocks the second valve port.
According to another aspect of the present invention, a kind of refrigeration control method of air-conditioning system is provided, air-conditioning system is above-mentioned
Air-conditioning system, control method includes：Control the four-way valve of air-conditioning system so that four-way valve first interface and four-way valve the
Two orifices, the third interface of four-way valve and the 4th orifice of four-way valve；Control the second electronic expansion of air-conditioning system
Valve is so that the second electric expansion valve is shown in a fully open operation.
According to another aspect of the present invention, a kind of refrigeration control method of air-conditioning system is provided, air-conditioning system is above-mentioned
Air-conditioning system, control method includes：Control the four-way valve of air-conditioning system so that four-way valve first interface and four-way valve the
Two orifices, the third interface of four-way valve and the 4th orifice of four-way valve；Control the second electronic expansion of air-conditioning system
The driving portion of valve, so that the needle of the second electric expansion valve is moved to the first open position under the drive of valve rod.
It applies the technical scheme of the present invention, air-conditioning system includes the compressor for being sequentially communicated and being formed circulation loop, four-way
Valve, outdoor heat exchanger, the first electric expansion valve, the first indoor heat exchanger, the second electric expansion valve and the second indoor heat exchanger.
When air-conditioning system is in the first operating mode (refrigeration or heating dehumidifying), first interface is connected to second interface, and third connects
Mouth and the 4th orifice.When air-conditioning system is in the second operating mode (heating), first interface and the 4th orifice, and
Second interface and third orifice.Wherein, when air-conditioning system is in the refrigeration mode under the first operating mode, the second electronics
Expansion valve is in the open state, and air-conditioning system is freezed.When air-conditioning system is in the dehumidifying mould of the heating under the first operating mode
When formula, the second electric expansion valve is in the lesser state of flow, at this point, into the refrigerant evaporation of the second indoor heat exchanger, it is indoor
The hotter air precooling with humidity condenses into water droplet.And the first indoor heat exchanger is equivalent to condenser, can continue to as room
Interior offer heat, the purpose not cooled down so as to complete dehumidifying.Due to electric expansion valve self structure, not by pressure
Interference, therefore electric expansion valve can open and close with pressure difference.Therefore before returning to heating mode, no
Compressor must be shut down again, to save electric power, reduced energy consumption, saved the energy.When air-conditioning system is in the second Working mould
When formula, electric expansion valve can throttle, at this point, in the first indoor heat exchanger refrigerant temperature than the second indoor heat exchanger temperature
Degree wants low, therefore when wind is on the first indoor heat exchanger and the second indoor heat exchanger of different temperatures, can blow out difference
The wind of temperature to meet the demand that user needs the wind of different temperatures, and then improves user experience, solves the prior art
In air conditioner poor user experience the problem of.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings：
Fig. 1 shows the structural schematic diagram of air-conditioning system in the prior art；
Fig. 2 shows the structural representations under the second operating mode of the embodiment of air-conditioning system according to the present invention
Figure；
The air-conditioning system that Fig. 3 shows Fig. 2 is in the structural schematic diagram under the first operating mode；
Fig. 4 shows the flow adjusting figure of the second electric expansion valve of the air-conditioning system of Fig. 2；
Fig. 5 shows the enlarged drawing of the flow adjusting figure of the second electric expansion valve of Fig. 4；
Fig. 6 shows the vertical profile structural schematic diagram of the second electric expansion valve of the air-conditioning system of Fig. 2；
Fig. 7 shows the schematic diagram of internal structure of the second electric expansion valve of Fig. 6；
Vertical profile structural schematic diagram when the needle that Fig. 8 shows the second electric expansion valve of Fig. 6 is mutually separated with the first valve port；
Fig. 9 shows the enlarged diagram at the C of the second electric expansion valve of Fig. 8；
Figure 10 shows the needle of the second electric expansion valve of Fig. 8 and the distance relation schematic diagram of the first valve port；
Vertical profile structural representation when the needle and the first valve port that Figure 11 shows the second electric expansion valve of Fig. 6 abut against
Figure；
Figure 12 shows the enlarged diagram at the F of the second electric expansion valve of Figure 11；
Figure 13 shows the valve rod of the second electric expansion valve of Fig. 6 and the schematic diagram of internal structure of partial valve needle；
Figure 14 shows the valve rod of Figure 13 and the schematic front view of partial valve needle；
Figure 15 shows the enlarged diagram at the H of the second electric expansion valve of Figure 14；
Figure 16 shows the schematic perspective view of the branching block of the second electric expansion valve of Fig. 6；And
Figure 17 shows the overlooking structure diagrams of the branching block of Figure 16.
Wherein, above-mentioned attached drawing includes the following drawings label：
10, compressor；11, outlet end；12, arrival end；20, four-way valve；21, first interface；22, second interface；23,
Three interfaces；24, the 4th interface；30, outdoor heat exchanger；31, outdoor heat exchanger port；40, the first electric expansion valve；50, first
Indoor heat exchanger；60, the second indoor heat exchanger；61, indoor heat exchanger port；70, the second electric expansion valve；71, valve body；711,
First valve port；72, needle；721, the second valve port；722, the first flow channels；723, communicating passage；73, valve rod；74, it drives
Portion；75, backstopping assembly；76, bellows；77, noise-reducing structure；771, the first noise elimination part；772, upper acoustic element；773, branching block；
7731, the second flow channels；774, lower acoustic element.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figures 2 and 3, the air-conditioning system of the present embodiment includes：It is sequentially communicated and is formed the compressor of circulation loop
10, four-way valve 20, outdoor heat exchanger 30, the first electric expansion valve 40, the first indoor heat exchanger 50, the second electric expansion valve 70 with
And second indoor heat exchanger 60；The first interface 21 of four-way valve 20 is connected with the outlet end 11 of compressor 10；Four-way valve 20
Second interface 22 is connected with the outdoor heat exchanger port 31 of outdoor heat exchanger 30；The third interface 23 and compressor of four-way valve 20
10 arrival end 12 is connected；61 phase of indoor heat exchanger port of 4th interface 24 of four-way valve 20 and the second indoor heat exchanger 60
Connection, wherein air-conditioning system includes the first operating mode and the second operating mode, when air-conditioning system is in the first operating mode
When, first interface 21 is connected to second interface 22, and third interface 23 is connected to the 4th interface 24, when air-conditioning system is in second
When operating mode, first interface 21 is connected to the 4th interface 24, and second interface 22 is connected to third interface 23.
Using the technical solution of the present embodiment, air-conditioning system include the compressor 10 for being sequentially communicated and being formed circulation loop,
Four-way valve 20, outdoor heat exchanger 30, the first electric expansion valve 40, the first indoor heat exchanger 50, the second electric expansion valve 70 and
Second indoor heat exchanger 60.When air-conditioning system is in the first operating mode (refrigeration or heating dehumidifying), first interface 21 and the
The connection of two interfaces 22, and third interface 23 is connected to the 4th interface 24.When air-conditioning system is in the second operating mode (heating),
First interface 21 is connected to the 4th interface 24, and second interface 22 is connected to third interface 23.
Wherein, when air-conditioning system is in the refrigeration mode under the first operating mode, the second electric expansion valve 70 is in and beats
Open state, the first indoor heat exchanger 50 and the second indoor heat exchanger 60 are equivalent to evaporator.First indoor heat exchanger 50 and second
Refrigerant evaporation heat absorption in indoor heat exchanger 60, to reduce indoor temperature, plays the effect of refrigeration.
As shown in figure 3, when air-conditioning system is in the heating dehumidification mode under the first operating mode, the second electric expansion valve
In the lesser state of flow (flow small state when than standard-sized sheet).At this point, the first indoor heat exchanger 50 is equivalent to condenser,
Second indoor heat exchanger 60 is equivalent to evaporator.When the indoor hotter air with humidity is contacted with the second indoor heat exchanger 60
When, it can be pre-chilled and condense into water droplet, to eliminate moisture within doors.At the same time, since the first indoor heat exchanger 50 is equivalent to
Condenser, therefore when wind is on the first indoor heat exchanger 50, the higher wind of temperature can be blown out, to guarantee temperature within doors
Degree does not decline, the purpose not cooled down so as to complete dehumidifying.
Further, since the reason of electric expansion valve self structure, the opening and closing of electric expansion valve pass through driving completely
Portion's control, not by the interference of system pressure, therefore electric expansion valve can normally be beaten with larger pressure difference
It is open and close.Therefore after the completion of dehumidification process, before system switches back into heating mode, it is not necessary to compressor is shut down, to save
Electric power reduces energy consumption, has saved the energy.
Similarly, due to electric expansion valve self structure, the opening and closing of electric expansion valve pass through driving completely
Portion's control, not by the interference of system pressure, therefore electric expansion valve can normally be beaten with larger pressure difference
It is open and close.As shown in Fig. 2, the second electric expansion valve 70 is able to carry out throttling when air-conditioning system is in heating mode.This
When, the temperature of refrigerant is lower than the temperature of the second indoor heat exchanger 60 in the first indoor heat exchanger 50, therefore when wind is not to
When on synthermal the first indoor heat exchanger 50 and the second indoor heat exchanger 60, wind (the first interior of different temperatures can be blown out
Heat exchanger 50 blows out the wind of T2 temperature, and the second indoor heat exchanger 60 blows out the wind of T1 temperature), so that meeting user needs not equality of temperature
The demand of the wind of degree, and then user experience is improved, solve the problems, such as the poor user experience of air conditioner in the prior art.
As shown in Fig. 6 to Figure 12, in the present embodiment, the second electric expansion valve 70 includes：Valve body 71, needle 72, valve rod
73 and driving portion 74.Wherein, valve body 71 has the first valve port 711.Needle 72 has abut with the first valve port 711 first to close
Closed position and the first open position for avoiding the first valve port 711, the bottom of needle 72 have the be connected to the first valve port 711
Two valve ports 721, have the first flow channels 722 being connected to the second valve port 721 on needle 72, and the first flow channels 722 enter
Mouth is located on the side wall of needle 72.Valve rod 73 is at least partly threaded through the inside of needle 72, and valve rod 73 can be moved up and down to adjust
Save the flow at the second valve port 721.74 driving stem 73 of driving portion moves up and down, wherein is arranged between valve rod 73 and needle 72
There is backstopping assembly 75, so as to move synchronously both when needle 72 is contacted with valve rod 73 by backstopping assembly 75, when needle 72 is located at
When the first closed position, valve rod 73 can move up and down relative to needle 72.Above structure plays the role of altogether two：
The first, backstopping assembly 75 is provided between needle 72 and valve rod 73, above structure makes needle 72 and valve rod 73
It is moved synchronously both when being contacted by backstopping assembly 75, when needle 72 is located at the first closed position, valve rod 73 can be relative to
Needle 72 moves up and down.
The second, the bottom of needle 72 has the second valve port 721 being connected to the first valve port 711 on valve body 71, needle 72
With the first flow channels 722 being connected to the second valve port 721.When needle 72 is located at the first open position, a part of fluid
It flows directly at the first valve port 711, another part fluid flows into needle from 722 entrance of the first flow channels on 72 side wall of needle
Inside 72, then flow at the first valve port 711.In the above-mentioned course of work, the flow of fluid is larger, and the second electric expansion valve is
Flow is adjusted by the aperture between the first valve port 711 and needle 72.And work as needle 72 and be located at the first closed position, valve
When bar 73 moves up and down, fluid will be flowed into only inside needle 72 from the entrance of the first flow channels 722, then flow to the first valve port
At 711.In the above-mentioned course of work, the flow of fluid is smaller, and the second electric expansion valve 70 relies on the second valve port 721 and valve rod
The fluid of small flow is adjusted in aperture between 73.Above structure adjusts small flow, and section is independent to be used as one
Unit realizes accurate adjusting of the system to small flow.
Specifically, when the driving of 73 driven part of valve rod moves down, needle 72 is due to its own gravity and is pressed
The reason of poor power, can be in contact with backstopping assembly 75.The structure of above-mentioned backstopping assembly 75 enables needle 72 with valve rod 73 at this
It is moved synchronously under state, until needle 72 is located at the first closed position.When needle 72 is located at the first closed position, needle
72 start to separate with 75 phase of backstopping assembly, and valve rod 73 can be moved downward relative to needle 72 at this time.When 73 driven part of valve rod
When being driven up mobile, valve rod 73 can be moved upwards relative to needle 72, until needle 72 is in contact with backstopping assembly 75.When
When needle 72 and backstopping assembly 75 contact, valve rod 73 starts that needle 72 is driven to move upwards together.When motor is opened to standard-sized sheet pulse
When, the second electric expansion valve 70 is whole to reach full-gear.
Fig. 4 shows two-part electric expansion valve (small flow adjusts the electric expansion valve that section is independently arranged) flow and adjusts
Figure, abscissa is umber of pulse, and ordinate is flow.The adjusting of two-part flow of electronic expansion valve is in fact divided into three sections, respectively
Small flow adjusts section A sections, big flow adjusting section B sections and standard-sized sheet section (cold medium flux is basically unchanged).Preferably, in the present embodiment
In, when motor pulses number is in A sections, the second electric expansion valve is in second flow state, when motor pulses number at B sections and
When in standard-sized sheet section, the second electric expansion valve is in first flow state.Fig. 5 shows the enlarged drawing of the A section of Fig. 4, the energy from figure
Enough find out, the flow of two-part electric expansion valve adjusts more accurate.
Those skilled in the art it is recognised that the adjusting of small flow can also directly adjust needle 72 by driving portion 74,
Small Flow Control is carried out by the aperture of needle 72.
It should be noted that the first flow channels 722 can be multiple.The number of above-mentioned first flow channels 722 can be with
It is adjusted according to system requirements.
It should also be noted that, the front end of valve rod 73 is needle columnar structure.
As shown in Fig. 8 to Figure 12, in the present embodiment, the bottom of needle 72 also has communicating passage 723, communicating passage
723 are located at the outer circumferential of the second valve port 721 and are connected to the first flow channels 722 and the first valve port 711.Specifically, work as needle
72 are located at the first closed position, and when valve rod 73 and the second valve port 721 abut against, the fluid into the first flow channels 722 is flowed into
Above-mentioned communicating passage 723.Since communicating passage 723 is connected to the first flow channels 722 and the first valve port 711, connection is flowed into
The fluid in channel 723 can finally flow out from the first valve port 711.It is defeated that above structure can be realized small flow required by system
Out.Guarantee the small flow output for still having fixed when the second electric expansion valve 70 is closed.Flow representated by G point in Fig. 4 is
For the small flow of above-mentioned fixation.
As shown in fig. 6, in the present embodiment, the second electric expansion valve 70 further includes：Bellows 76 is set in valve rod 73
Outside, one end of the separate needle 72 of bellows 76 are connected to one end of the close driving portion 74 of valve body 71, the phase of bellows 76
Pair the other end be connected on valve rod 73.When valve rod 73 moves down, bellows 76 is elongated, and stores elastic potential energy.Work as valve rod
73 when needing to move up, and valve rod 73 moves up under the action of driving portion (motor, coil) and elastic force.Above structure
Simply, it is easy to accomplish.
As shown in figure 8, in the present embodiment, the second electric expansion valve 70 further includes：Noise-reducing structure 77.Noise-reducing structure 77 is set
It sets in needle 72, flows out needle 72 after 77 noise reduction of noise-reducing structure into the fluid in needle 72.The present embodiment will be easy
The small flow adjusting section for generating noise is independent as a unit, and the noise reduction for reducing noise is then provided at the unit
Structure 77, to solve the problems, such as that electric expansion valve noise is big in the prior art.
Preferably, as shown in figure 8, in the present embodiment, noise-reducing structure 77 includes the first noise elimination part 771, the first noise elimination part
771 are arranged between needle 72 and valve rod 73 and are located at the top of the second valve port 721, so that entering from the first flow channels 722
The fluid that mouth enters is flowed to after the first noise elimination part 771 at first valve port 711.It is further preferred that multiple first cross circulation
Road 722 is located at the outer circumferential of the first noise elimination part 771.
Noise caused by section is adjusted to further decrease small flow, if Fig. 8 to Figure 14 shows, in the present embodiment, second
Electric expansion valve 70 further includes the second noise elimination part, and the lower section of the second valve port 721 is arranged in the second noise elimination part.Specifically, from first
The fluid that 722 entrance of flow channels flows into inside needle 72 will be carried out successively by the first noise elimination part 771 and the second noise elimination part
Noise reduction, and eventually enter at the first valve port 711.Above structure makes the fluid after 771 noise reduction of the first noise elimination part disappear again
Sound to create a further reduction noise, and then improves the usage comfort of user.
If Fig. 8 to Figure 14 shows, in the present embodiment, the bottom of needle 72 has accommodation space, and accommodation space is located at second
The lower section of valve port 721, the top of accommodation space are connected to the second valve port 721, and the bottom of accommodation space and the first valve port 711 connect
Logical, the second noise elimination part is contained in accommodation space.On the one hand above structure makes the second noise elimination part have stable operating position,
To guarantee the working effect of the second noise elimination part, it is able to enter the fluid after the first noise elimination part 771
Second noise elimination part carries out abundant noise reduction, to achieve the purpose that create a further reduction noise, the use for improving user is comfortable
Degree.
It should be noted that the resistance area of communicating passage 723 is bigger with respect to the resistance area of the second valve port 721, therefore fluid
More easily flowed out from the second valve port 721.
Certainly, in other embodiments not shown in the figure, above-mentioned communicating passage 723 may be multiple.This field
Technical staff is it is to be understood that the number of communicating passage 723 can rationally be set by the system flow required when valve is closed
It sets, the adjusting needs of the valve opening pulse point of electric expansion valve when reducing actual use demand.Certainly, above-mentioned communicating passage 723
Channel radius can also be adjusted according to actual needs.
If Fig. 8 to Figure 14 shows, in the present embodiment, the second noise elimination part include upper acoustic element 772, lower acoustic element 774 and
Branching block 773 between upper acoustic element 772 and lower acoustic element 774 is set.Above structure makes fluid that will pass through multiple noise reductions
Part eliminates the similar sound vortex that screams, to realize the purpose for reducing noise sufficiently to break up above-mentioned fluid.In the present embodiment
In, there are the second flow channels 7731, the fluid after upper acoustic element 772 passes through the second flow channels on branching block 773
7731 flow into lower acoustic element 774.Above structure make fluid from upper acoustic element 772 flow to lower acoustic element 774 during will again
It is secondary to be acted on by branching block, form the multiple utilization to acoustic element.Under equal conditions, noise reduction energy is carried out using above structure
It is enough more fully to utilize acoustic element, and the vortex for generating abnormal sound can be more efficiently eliminated, to reach further drop
The purpose of low noise.
Specifically, since the lower section of upper acoustic element 772 is arranged in branching block 773, when fluid is from communicating passage 723
Into after upper acoustic element 772, fluid continues to downlink until encountering branching block 773.Such as Fig. 8, Fig. 9, Figure 11, Figure 16 and Figure 17
Shown, a part of fluid will be directed into the second flow channels 7731 in branching block 773 and flow into lower acoustic element 774, another portion
The entity part that shunting body is split block 773 is kept off back, so that being again introduced into acoustic element 772 carries out noise reduction, until fluid enters
Until second flow channels 7731.
Certainly, as shown in Figure 10 and Figure 11, above-mentioned second flow channels 7731 can also be set according to the needs of system requirements
It is set to multiple.
As is illustrated by figs. 11 and 12, in the present embodiment, the first noise elimination part 771 is set in outside valve rod 73 and is located at needle 72
Inside, the first noise elimination part 771 has tubular noise elimination part and cyclic annular noise elimination part, is provided in the middle part of tubular noise elimination part for avoiding
The avoid holes of valve rod 73.
As shown in fig. 6, in the present embodiment, backstopping assembly 75 includes the retaining ring being arranged on valve rod 73, set on needle 72
It is equipped with the auxiliary section with retaining ring cooperation.Above structure is simple, and above structure can effectively limit valve rod 73 and shift up
Limiting length.Certainly, this example and technical staff are it is to be understood that backstopping assembly may be the retaining ring being arranged on needle, valve
The cooperation concave portion with retaining ring cooperation is provided on bar.
It should also be noted that, the lower end surface of retaining ring is small with the stroke L1 before the upper end face contact of the first noise elimination part 771
Flow adjusts section, i.e. the distance between J point on the I point and needle 72 on valve rod in Figure 15 is (when valve rod 73 is blocked second
I point is overlapped with J point when on valve port 721).Above-mentioned L1 length is smaller, i.e. aperture at the second valve port 721 is small, can generate apparent
Throttling.Therefore, in the present embodiment, the second noise elimination part is arranged in the lower section of the second valve port 721, above structure can reduce due to
The abnormal sound of apparent throttling and generation, improves the usage comfort of user.
It should also be noted that, valve rod 73 drives the stroke L2 of the movement of needle 72 for big flow adjusting section, i.e. in Figure 10
The distance between the E point on D point and valve body 71 on needle 72 (when needle 72 is located at closed position, D point is overlapped with E point)
Present invention also provides a kind of heating dehumidification control method of air-conditioning system, air-conditioning system is above-mentioned air-conditioning system
System, control method include：Control the four-way valve 20 of air-conditioning system so that four-way valve 20 first interface 21 and four-way valve 20 the
The connection of two interfaces 22, the third interface 23 of four-way valve 20 are connected to the 4th interface 24 of four-way valve 20；Second electricity of air-conditioning system
There is sub- expansion valve first flow state and flow to be less than the second flow state of first flow state, control the second electronic expansion
Valve 70 is so that the second electric expansion valve 70 is in second flow state.
When carrying out heating dehumidifying, the second electric expansion valve of control is in the lesser state of flow (than flowing when standard-sized sheet
Amount wants small state).At this point, the first indoor heat exchanger 50 is equivalent to condenser, the second indoor heat exchanger 60 is equivalent to evaporator.
When the indoor hotter air with humidity and the second indoor heat exchanger 60 contact, it can be pre-chilled and condense into water droplet, to remove
Moisture within doors.At the same time, since the first indoor heat exchanger 50 is equivalent to condenser, when wind is changed in the first interior
When on hot device 50, the higher wind of temperature can be blown out, to guarantee that temperature within doors does not decline, is not cooled down so as to complete dehumidifying
Purpose.
Further, since the reason of electric expansion valve self structure, the opening and closing of electric expansion valve pass through driving completely
Portion's control, not by the interference of system pressure, therefore the second electric expansion valve 70 can be with larger pressure difference just
Normal opening and closing.Therefore after the completion of dehumidification process, before system switches back into heating mode, it is not necessary to compressor 10 is shut down, from
And electric power has been saved, energy consumption is reduced, the energy has been saved.
Present invention also provides a kind of heating dehumidification control method of air-conditioning system, air-conditioning system is above-mentioned air-conditioning system
System, control method include：Control the four-way valve 20 of air-conditioning system so that four-way valve 20 first interface 21 and four-way valve 20 the
The connection of two interfaces 22, the third interface 23 of four-way valve 20 are connected to the 4th interface 24 of four-way valve 20；Control the of air-conditioning system
The driving portion 74 of two electric expansion valves 70, so that the valve rod 73 of the second electric expansion valve 70 is moved to the second closed position, wherein
When valve rod 73 is located at the second closed position, needle 72 is located at the first closed position, and valve rod 73 blocks the second valve port 721.Due to
Communicating passage 723 is connected to the first flow channels 722 and the first valve port 711, therefore the fluid for flowing into communicating passage 723 finally can
It is flowed out from the first valve port 711.Above structure can be realized the small flow output of fixation required by system, so that heating dehumidifying
Better effect.
Present invention also provides a kind of heat-production control method of air-conditioning system, air-conditioning system is above-mentioned air-conditioning system, control
Method processed includes：The four-way valve 20 of air-conditioning system is controlled so that the first interface 21 of four-way valve 20 and the 4th interface of four-way valve 20
24 connections, the second interface 22 of four-way valve 20 are connected to the third interface 23 of four-way valve 20；Second electronic expansion of air-conditioning system
There is valve 70 first flow state and flow to be less than the second flow state of first flow state, control the second electric expansion valve 70
So that the second electric expansion valve 70 is in second flow state.
Specifically, when air-conditioning system is in heating mode, the second electric expansion valve 70 is able to carry out throttling.At this point, the
The temperature of refrigerant is lower than the temperature of the second indoor heat exchanger 60 in one indoor heat exchanger 50, therefore works as wind to different temperatures
The first indoor heat exchanger 50 and the second indoor heat exchanger 60 on when, the wind of different temperatures can be blown out, to meet user's need
The demand of the wind of different temperatures is wanted, and then improves user experience, solves the poor user experience of air conditioner in the prior art
The problem of.
Present invention also provides a kind of heat-production control method of air-conditioning system, air-conditioning system is above-mentioned air-conditioning system, control
Method processed includes：The four-way valve 20 of air-conditioning system is controlled so that the first interface 21 of four-way valve 20 and the 4th interface of four-way valve 20
24 connections, the second interface 22 of four-way valve 20 are connected to the third interface 23 of four-way valve 20；Control the second electronics of air-conditioning system
The driving portion 74 of expansion valve 70, so that the valve rod 73 of the second electric expansion valve 70 is under the driving of driving portion 74 in the second open position
It sets and is moved between the second closed position, wherein when valve rod 73 is located at the second open position, the valve of the second electric expansion valve 70
Needle 72 is located at the first closed position, and valve rod 73 avoids the second valve port 721 of the second electric expansion valve 70, and needle 72 and valve rod
73 are contacted by the backstopping assembly 75 of the second electric expansion valve 70, and when valve rod 73 is located at the second closed position, needle 72 is located at
First closed position, valve rod 73 block the second valve port 721.Above structure can be controlled by controlling the aperture of valve rod 73 from the
The flow of the refrigerant of two electric expansion valves 70 outflow, and then control the temperature of the first indoor heat exchanger 50 and the second indoor heat exchanger 60
Degree, meets the needs of user is to different temperatures, further improves user experience.
Present invention also provides a kind of refrigeration control method of air-conditioning system, air-conditioning system is above-mentioned air-conditioning system, control
Method processed includes：The four-way valve 20 of air-conditioning system is controlled so that the first interface 21 of four-way valve 20 and the second interface of four-way valve 20
22 connections, the third interface 23 of four-way valve 20 are connected to the 4th interface 24 of four-way valve 20；Control the second electronics of air-conditioning system
Expansion valve 70 is so that the second electric expansion valve 70 is shown in a fully open operation.
Wherein, when needing to freeze, 70 standard-sized sheet of the second electric expansion valve, heat exchange in the first indoor heat exchanger 50 and second Room
Device 60 is equivalent to evaporator.Refrigerant evaporation heat absorption in first indoor heat exchanger 50 and the second indoor heat exchanger 60, to reduce
Indoor temperature plays the effect of refrigeration.
Present invention also provides a kind of refrigeration control method of air-conditioning system, air-conditioning system is above-mentioned air-conditioning system, control
Method processed includes：The four-way valve 20 of air-conditioning system is controlled so that the first interface 21 of four-way valve 20 and the second interface of four-way valve 20
22 connections, the third interface 23 of four-way valve 20 are connected to the 4th interface 24 of four-way valve 20；Control the second electronics of air-conditioning system
The driving portion 74 of expansion valve 70, so that the needle 72 of the second electric expansion valve 70 is moved to the first unlatching under the drive of valve rod 73
Position.Above structure is simple, and control is accurate.It should be noted that the second electric expansion valve 70 is in standard-sized sheet when needing to freeze
State.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (11)
1. a kind of air-conditioning system, which is characterized in that including：
It is sequentially communicated and is formed the compressor (10), four-way valve (20), outdoor heat exchanger (30), the first electronic expansion of circulation loop
Valve (40), the first indoor heat exchanger (50), the second electric expansion valve (70) and the second indoor heat exchanger (60)；
The first interface (21) of the four-way valve (20) is connected with the outlet end (11) of the compressor (10)；
The second interface (22) of the four-way valve (20) is connected with the outdoor heat exchanger port (31) of the outdoor heat exchanger (30)
It is logical；
The third interface (23) of the four-way valve (20) is connected with the arrival end (12) of the compressor (10)；
4th interface (24) of the four-way valve (20) and the indoor heat exchanger port (61) of second indoor heat exchanger (60)
It is connected,
Wherein, the air-conditioning system includes the first operating mode and the second operating mode, when the air-conditioning system is in described the
When one operating mode, the first interface (21) is connected to the second interface (22), and the third interface (23) with it is described
4th interface (24) connection, when the air-conditioning system is in second operating mode, the first interface (21) with it is described
The connection of 4th interface (24), and the second interface (22) is connected to the third interface (23).
2. air-conditioning system according to claim 1, which is characterized in that second electric expansion valve (70) includes：
Valve body (71) has the first valve port (711)；
Needle (72) has the first closed position abutted with first valve port (711) and evacuation first valve port
(711) the first open position, the bottom of the needle (72) have the second valve port being connected to first valve port (711)
(721), there is the first flow channels (722) being connected to second valve port (721), first mistake on the needle (72)
The entrance of circulation road (722) is located on the side wall of the needle (72)；
Valve rod (73), is at least partly threaded through the inside of the needle (72), and the valve rod (73) can move up and down to adjust
Flow at second valve port (721)；
Driving portion (74) drives the valve rod (73) to move up and down,
Wherein, backstopping assembly (75) are provided between the valve rod (73) and the needle (72) so that the needle (72) with
It is moved synchronously both when the valve rod (73) is contacted by the backstopping assembly (75), when the needle (72) are located at described first
When closed position, the valve rod (73) can move up and down relative to the needle (72).
3. air-conditioning system according to claim 2, which is characterized in that the bottom of the needle (72) also has communicating passage
(723), the communicating passage (723) is located at the outer circumferential of second valve port (721) and is connected to first flow channels
(722) and first valve port (711).
4. air-conditioning system according to claim 3, which is characterized in that second electric expansion valve (70) further includes：
Bellows (76) is set in the outside of the valve rod (73), one far from the needle (72) of the bellows (76)
End is connected to one end close to the driving portion (74) of the valve body (71), and the opposite other end of the bellows (76) connects
It connects on the valve rod (73).
5. air-conditioning system according to claim 3, which is characterized in that second electric expansion valve further includes：
Noise-reducing structure (77), setting pass through the noise reduction knot in the needle (72), into the fluid in the needle (72)
The needle (72) are flowed out after structure (77) noise reduction.
6. a kind of heating dehumidification control method of air-conditioning system, the air-conditioning system is described in any one of claims 1 to 5
Air-conditioning system, which is characterized in that the control method includes：
Control air-conditioning system four-way valve (20) so that the four-way valve (20) first interface (21) and the four-way valve (20)
Second interface (22) connection, the 4th interface (24) of the third interface (23) of the four-way valve (20) and the four-way valve (20)
Connection；
There is the second electric expansion valve (70) of the air-conditioning system first flow state and flow to be less than the first flow shape
The second flow state of state controls second electric expansion valve (70) so that second electric expansion valve (70) is in described
Second flow state.
7. a kind of heating dehumidification control method of air-conditioning system, the air-conditioning system is described in any one of claim 3 to 5
Air-conditioning system, which is characterized in that the control method includes：
Control air-conditioning system four-way valve (20) so that the four-way valve (20) first interface (21) and the four-way valve (20)
Second interface (22) connection, the 4th interface (24) of the third interface (23) of the four-way valve (20) and the four-way valve (20)
Connection；
The driving portion (74) of the second electric expansion valve (70) of the air-conditioning system is controlled, so that second electric expansion valve
(70) valve rod (73) is moved to the second closed position, wherein when the valve rod (73) is located at second closed position, institute
It states needle (72) and is located at first closed position, the valve rod (73) blocks second valve port (721).
8. a kind of heat-production control method of air-conditioning system, the air-conditioning system is air-conditioning described in any one of claims 1 to 5
System, which is characterized in that the control method includes：
Control the four-way valve (20) of the air-conditioning system so that the four-way valve (20) first interface (21) and the four-way valve
(20) the 4th interface (24) connection, the second interface (22) of the four-way valve (20) and the third interface of the four-way valve (20)
(23) it is connected to；
There is the second electric expansion valve (70) of the air-conditioning system first flow state and flow to be less than the first flow shape
The second flow state of state controls second electric expansion valve (70) so that second electric expansion valve (70) is in described
Second flow state.
9. a kind of heat-production control method of air-conditioning system, the air-conditioning system is air-conditioning described in any one of claim 3 to 5
System, which is characterized in that the control method includes：
Control the four-way valve (20) of the air-conditioning system so that the four-way valve (20) first interface (21) and the four-way valve
(20) the 4th interface (24) connection, the second interface (22) of the four-way valve (20) and the third interface of the four-way valve (20)
(23) it is connected to；
The driving portion (74) of the second electric expansion valve (70) of the air-conditioning system is controlled, so that second electric expansion valve
(70) valve rod (73) is moving between the second open position and the second closed position under the driving of the driving portion (74),
In, when the valve rod (73) is located at second open position, the needle (72) of second electric expansion valve (70) is located at
First closed position, the valve rod (73) avoid the second valve port (721) of second electric expansion valve (70), and the valve
Needle (72) is contacted with the valve rod (73) by the backstopping assembly (75) of second electric expansion valve (70), when the valve rod
(73) when being located at second closed position, the needle (72) is located at first closed position, and the valve rod (73) blocks
Second valve port (721).
10. a kind of refrigeration control method of air-conditioning system, the air-conditioning system is sky described in any one of claims 1 to 5
Adjusting system, which is characterized in that the control method includes：
Control the four-way valve (20) of the air-conditioning system so that the four-way valve (20) first interface (21) and the four-way valve
(20) second interface (22) connection, the third interface (23) of the four-way valve (20) and the 4th interface of the four-way valve (20)
(24) it is connected to；
The second electric expansion valve (70) of the air-conditioning system is controlled so that second electric expansion valve (70) is in standard-sized sheet shape
State.
11. a kind of refrigeration control method of air-conditioning system, the air-conditioning system is sky described in any one of claim 3 to 5
Adjusting system, which is characterized in that the control method includes：
Control the four-way valve (20) of the air-conditioning system so that the four-way valve (20) first interface (21) and the four-way valve
(20) second interface (22) connection, the third interface (23) of the four-way valve (20) and the 4th interface of the four-way valve (20)
(24) it is connected to；
The driving portion (74) of the second electric expansion valve (70) of the air-conditioning system is controlled, so that second electric expansion valve
(70) needle (72) is moved to the first open position under the drive of the valve rod (73).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710369686.5A CN108931068A (en) | 2017-05-23 | 2017-05-23 | Air-conditioning system, heating dehumanization method, heating method and refrigerating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710369686.5A CN108931068A (en) | 2017-05-23 | 2017-05-23 | Air-conditioning system, heating dehumanization method, heating method and refrigerating method |
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| CN108931068A true CN108931068A (en) | 2018-12-04 |
Family
ID=64451052
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710369686.5A Pending CN108931068A (en) | 2017-05-23 | 2017-05-23 | Air-conditioning system, heating dehumanization method, heating method and refrigerating method |
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| CN110715425A (en) * | 2019-10-21 | 2020-01-21 | 广东美的制冷设备有限公司 | Air conditioner and control method, device and equipment thereof |
| CN111609479A (en) * | 2020-04-23 | 2020-09-01 | 海信（山东）空调有限公司 | Air conditioner |
| CN112092566A (en) * | 2019-06-17 | 2020-12-18 | 杭州三花研究院有限公司 | Thermal management system |
| CN116428776A (en) * | 2023-04-12 | 2023-07-14 | 沈阳春晖工程有限公司 | Control method for balancing flow of expansion valve of evaporative cooling unit |
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Application publication date: 20181204 |