CN107449186A - Electronic expansion valve assembly and air conditioning system - Google Patents
Electronic expansion valve assembly and air conditioning system Download PDFInfo
- Publication number
- CN107449186A CN107449186A CN201710661209.6A CN201710661209A CN107449186A CN 107449186 A CN107449186 A CN 107449186A CN 201710661209 A CN201710661209 A CN 201710661209A CN 107449186 A CN107449186 A CN 107449186A
- Authority
- CN
- China
- Prior art keywords
- expansion valve
- house steward
- electronic expansion
- installing plate
- electric expansion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004378 air conditioning Methods 0.000 title claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 68
- 239000012530 fluid Substances 0.000 claims abstract description 18
- 230000004308 accommodation Effects 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 5
- 239000012774 insulation material Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 8
- 239000012535 impurity Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ink Jet (AREA)
Abstract
The invention provides an electronic expansion valve assembly and an air conditioning system, wherein the electronic expansion valve assembly comprises an electronic expansion valve, a liquid inlet main pipe and a liquid return main pipe; the number of the electronic expansion valves is more than two, and the electronic expansion valves are respectively connected with the liquid inlet main pipe and the liquid return main pipe, so that fluid can flow into the liquid return main pipe from the liquid inlet main pipe through the electronic expansion valves. The invention has the advantages of reasonable design and simple structure, can meet the working requirements of a large-capacity combined cabinet air treatment unit, can reduce the installation cost and is convenient to install.
Description
Technical field
The present invention relates to family's electro-technical field, more particularly to a kind of electronic expansion valve module and air-conditioning system.
Background technology
Combination sideboard air-treatment unit (referred to as " combination sideboard ") is incorporated to multi-gang air conditioner, collocation multi-connected outdoor unit makes
Used time, control unit, i.e. AHU adapters need to be increased between outdoor unit and combination sideboard, AHU adapters are by electronic expansion valve module
(EXV boxes) forms with electric-controlled parts (electric-controlled box).
The capacity (exchange capability of heat) of combination sideboard is typically bigger than general room machine capacity, when the capacity of combination sideboard is swollen more than electronics
During the maximum control capability of swollen valve, it is necessary to multiple electric expansion valves are together in parallel, co- controlling combination sideboard.
At present, there was only an electric expansion valve in an electronic expansion valve module, electric expansion valve welds with pipeline fitting
Together, electronic expansion valve member is formed, then the electronic expansion valve member is fixed on installing plate.When the group to be controlled
When conjunction cabinet capacity is bigger, it is necessary to which multiple such electronic expansion valve modules and electric-controlled parts are parallel in air-conditioning system.From
And overall cost is added, also increase the difficulty and workload of project installation.
The content of the invention
It is a primary object of the present invention to provide a kind of electronic expansion valve module and air-conditioning system, it can either meet great Rong
The work requirements of combination sideboard air-treatment unit are measured, and enough reduce installation cost, while are also convenient for installing.
One aspect of the present invention provides a kind of electronic expansion valve module, including electric expansion valve, feed liquor house steward and to return liquid total
Pipe；
The quantity of the electric expansion valve is two or more, electric expansion valve described in two or more respectively with the feed liquor
House steward connects with described time liquid house steward, enables a fluid to flow into from the feed liquor house steward by electric expansion valve described in two or more
Described time liquid house steward.
More preferably, in addition to feed tube；
The feed tube is connected with the feed liquor house steward, external fluid is inputted the feed liquor by the feed tube
House steward；
First filter is provided with the feed tube, enters the feed liquor house steward to be filtered through the feed tube
Fluid.
More preferably, in addition to liquid back pipe；
The liquid back pipe is connected with described time liquid house steward, the fluid returned in liquid house steward is passed through the liquid back pipe
Outflow；
The second filter is provided with the liquid back pipe, to be filtered through the fluid of the liquid back pipe outflow.
More preferably, in addition to installing plate；
The electric expansion valve is connected on the installing plate.
More preferably, the first connecting tube, quantity and the electricity of first connecting tube are provided with described time liquid house steward
The quantity of sub- expansion valve is identical and corresponds, and makes electric expansion valve described in two or more respectively by corresponding described
One connecting tube is connected to described return on liquid house steward；
At least two first connecting tubes are connected on the installing plate, the electric expansion valve are connected to described
On installing plate；
And/or the second connecting tube is provided with the feed liquor house steward, quantity and the electronics of second connecting tube
The quantity of expansion valve is identical and corresponds, and makes electric expansion valve described in two or more respectively by corresponding described second
Connecting tube is connected in the feed liquor house steward；
At least two second connecting tubes are connected on the installing plate, the electric expansion valve are connected to described
On installing plate.
More preferably, in addition to the first support being fixedly connected on the installing plate and at least two first pipe clamps；
At least two first pipe clamps are connected by screw in the first support, and can be with the first support
At least two first connecting tubes are gripped respectively.
More preferably, when including feed tube, in addition to the second support being fixedly connected on the installing plate and the second pipe
Folder；
Second pipe clamp is connected by screw in the second support, and can with the second support by it is described enter
Liquid pipe grips.
More preferably, when including liquid back pipe, in addition to the 3rd support being fixedly connected on the installing plate and the 3rd pipe
Folder；
3rd pipe clamp is connected by screw on the 3rd support, and described can will be returned with the 3rd support
Liquid pipe grips.
More preferably, in addition to upper lid；
The upper lid is detachably connected on the installing plate, and is collectively forming with the installing plate to accommodate the electricity
The accommodation space of sub- expansion valve.
More preferably, the insulation material to be incubated for the electric expansion valve is filled in the accommodation space.
Another aspect of the invention provides a kind of air-conditioning system, includes the electronic expansion valve module of any of the above technical characteristic.
More preferably, including combination sideboard air-treatment unit and indoor set；
The combination sideboard air-treatment unit is connected by the electronic expansion valve module with the indoor set.
The electronic expansion valve member of the offer of the present invention, uses the quantity of the electric expansion valve as two or more, two
Electric expansion valve described above is respectively connected with the feed liquor house steward and described time liquid house steward, is enabled a fluid to from the feed liquor
House steward flows into the technical scheme for returning liquid house steward by electric expansion valve described in two or more, can either meet that Large Copacity combines
The work requirements of cabinet air-treatment unit, and installation cost is enough reduced, while be also convenient for installing.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the present invention, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the electric expansion valve component structure diagram in embodiment one；
Fig. 2 is the electric expansion valve connection in Fig. 1；
Fig. 3 is the air-conditioning system structural representation in embodiment two；
In figure：1st, electric expansion valve；2nd, feed liquor house steward；21st, the second connecting tube；3rd, liquid house steward is returned；31st, the first connecting tube；
4th, feed tube；41st, first filter；5th, liquid back pipe；51st, the second filter；6th, installing plate；61st, first support；62nd, the first pipe
Folder；63rd, second support；64th, the second pipe clamp；65th, the 3rd support；66th, the 3rd pipe clamp；7th, electronic expansion valve module；8th, combination sideboard
Air-treatment unit；9th, indoor set.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and
Technical solution of the present invention is clearly and completely described corresponding accompanying drawing.Obviously, described embodiment is only the present invention one
Section Example, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
Go out under the premise of creative work the every other embodiment obtained, belong to the scope of protection of the invention.
It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, "
Two " etc. be for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so use
Data can exchange in the appropriate case, so as to embodiments of the invention described herein can with except illustrating herein or
Order beyond those of description is implemented.
Embodiment one
As shown in Figure 1, 2, a kind of electronic expansion valve module, including electric expansion valve 1, feed liquor house steward 2 and time liquid house steward 3,
The quantity of electric expansion valve 1 is two or more, and two or more electric expansion valve 1 respectively connects with feed liquor house steward 2 and time liquid house steward 3
Connect, enable a fluid to flow into back liquid house steward 3 from feed liquor house steward 2 by two or more electric expansion valve 1.In use, for example more
In gang air conditioner, the electronic expansion valve module directly can be connected to combination sideboard air-treatment unit by feed liquor house steward 2, together
When by return liquid house steward 3 be connected to indoor set, enable combination sideboard air-treatment unit by refrigerant pass sequentially through feed liquor house steward 2,
Two or more electric expansion valve 1, time liquid house steward 3 get in machine.
So it is equal to and two or more electric expansion valve 1 is integrated into an electronic expansion valve module, it is not only installed
It is convenient, and installation cost can be greatlyd save relative to prior art, while by more than two electric expansion valves 1 by group
Close cabinet air-treatment unit to connect with indoor set, disclosure satisfy that the work requirements of Large Copacity combination sideboard air-treatment unit.In reality
Border from make in, feed liquor house steward 2 and return liquid house steward 3 can be arranged in parallel, the length of the two can according to the quantity of electric expansion valve 1 come
It is determined that (accomplishing most short) as far as possible, principle is to need to keep certain distance between adjacent electric expansion valve 1, need to be guaranteed swollen in electronics
The swollen top of valve 1 insertion coil of electronic expansion valve.
Further, in addition to feed tube 4, feed tube 4 are connected with feed liquor house steward 2, external fluid is passed through feed liquor
Pipe 4 inputs feed liquor house steward 2, and first filter 41 is provided with feed tube 4, total into feed liquor to be filtered through feed tube 4
The fluid of pipe 2.Electronic expansion valve module can pass through feed tube 4 and external equipment (such as combination sideboard air-treatment unit) during installation
Make installment work become more to facilitate, while first filter 41 is provided with feed tube 4.It can prevent impurity from entering with fluid
Enter electric expansion valve 1 and electric expansion valve 1 is caused to damage.
More preferably, in addition to liquid back pipe 5, liquid back pipe 5 are connected with returning liquid house steward 3, the fluid in liquid house steward 3 is led to
Cross liquid back pipe 5 to flow out, the second filter 51 is provided with liquid back pipe 5, to be filtered through the fluid of the outflow of liquid back pipe 5.Peace
Electronic expansion valve module can make installment work become more to facilitate by liquid back pipe 5 and external equipment (such as indoor set) during dress,
The second filter 51 is provided with liquid back pipe 5 simultaneously.Impurity can be prevented with fluid into external equipment and to external equipment
Cause to damage.
As a kind of embodiment, as shown in fig. 1, in addition to installing plate 6, electric expansion valve 1 are connected to installing plate 6
On.Because multiple electric expansion valves 1 by feed liquor house steward 2 and return liquid house steward 3 and become one, by multiple electronic expansions
When valve 1 is connected on installing plate 6, can by by several electric expansion valves 1 therein and/or feed liquor house steward 2 and/or return liquid house steward
3 are connected on installing plate 6, and multiple electric expansion valves 1 are stably installed on installing plate 6 with realizing.
Specifically, as shown in fig. 1, the first connecting tube 31, the quantity of the first connecting tube 31 are provided with liquid house steward 3 is returned
It is identical with the quantity of electric expansion valve 1 and correspond, make two or more electric expansion valve 1 respectively by corresponding first
Connecting tube 31 is connected to back on liquid house steward 3, and at least two first connecting tubes 31 are connected on installing plate 6, by electric expansion valve 1
It is connected on installing plate 6.And/or the second connecting tube 21 is provided with feed liquor house steward 2, quantity and the electricity of the second connecting tube 21
The quantity of sub- expansion valve 1 is identical and corresponds, and makes two or more electric expansion valve 1 respectively by the second corresponding connection
Pipe 21 is connected in feed liquor house steward 2, and at least two second connecting tubes 21 are connected on installing plate 6, and electric expansion valve 1 is connected
On installing plate 6.
In addition to the first support 61 and at least two that is fixedly connected on installing plate 6 further, as shown in fig. 1,
First pipe clamp 62, at least two first pipe clamps 62 are connected by screw in first support 61, and can be divided with first support 61
At least two first connecting tubes 31 are not gripped.Wherein first support 61 can be welded on installing plate 6, but is simultaneously not only limited
, can also be by the way of other can be realized in this.The fixed form of first connecting tube 31 is not limited to that, can also be adopted
With any mode of other achievable goals of the invention.
Further, when including feed tube 4, in addition to the second support 63 and second being fixedly connected on installing plate 6
Pipe clamp 64, the second pipe clamp 64 are connected by screw in second support 63, and can be clamped feed tube 4 admittedly with second support 63
It is fixed.Wherein second support 63 can be welded on installing plate 6, it is not limited to this, can also use what other can be realized
Mode.The fixed form of feed tube 4 is not limited to that, can also use any mode of other achievable goals of the invention.
More preferably, when including liquid back pipe 5, in addition to the 3rd support 65 being fixedly connected on installing plate 6 and the 3rd pipe
Folder 66, the 3rd pipe clamp 66 is connected by screw on the 3rd support 65, and can be clamped liquid back pipe 5 admittedly with the 3rd support 65
It is fixed.Wherein the 3rd support 65 can be welded on installing plate 6, it is not limited to this, can also use what other can be realized
Mode.The fixed form of liquid back pipe 5 is not limited to that, can also use any mode of other achievable goals of the invention.
It is detachably connected on as another embodiment, in addition to upper lid (figure is to show), upper lid on installing plate 6,
And it is collectively forming to accommodate the accommodation space of electric expansion valve 1 with installing plate 6.It can lead between wherein upper lid and installing plate 6
Mode connects for screw is crossed, but is not limited to this.It should be noted that feed liquor house steward 2 and time liquid house steward 3 can be arranged on accommodation space
It is interior.When including feed tube 4 and during liquid back pipe 5, feed tube 4 and liquid back pipe 5 can also be arranged in accommodation space.Further
Ground, the insulation material to be incubated for electric expansion valve 1 is filled in accommodation space, insulation material can be foaming agent,
But it is not limited to this.
Embodiment two
To realize that goal of the invention another aspect of the invention provides a kind of air-conditioning system, as shown in figure 3, including in embodiment one
Described electronic expansion valve module 7.
Specifically, including combination sideboard air-treatment unit 8 and indoor set 9.Combination sideboard air-treatment unit 8 is swollen by electronics
Swollen valve module 7 is connected with indoor set 9, wherein combination sideboard air-treatment unit 8 be attached to electronic expansion valve module 7 feed liquor it is total
Guan Shang, indoor set 9 are attached on time liquid house steward of electronic expansion valve module 7, make the refrigerant in combination sideboard air-treatment unit 8
By feed liquor house steward, multiple electric expansion valves are flowed through, indoor set 9 is flowed to passing through back liquid house steward.
Above example make the present invention have it is reasonable in design, simple in construction, can either meet at Large Copacity combination sideboard air
The advantages of managing the work requirements of unit, and enough reduce installation cost, while being also convenient for installation.
Embodiments of the invention are the foregoing is only, are not intended to limit the invention, for those skilled in the art
For member, the present invention can have various modifications and variations.Any modification within the spirit and principles of the invention, being made,
Equivalent substitution, improvement etc., should be included within scope of the presently claimed invention.
Claims (12)
- A kind of 1. electronic expansion valve module, it is characterised in that：Including electric expansion valve (1), feed liquor house steward (2) and return liquid house steward (3)；The quantity of the electric expansion valve (1) is two or more, electric expansion valve (1) described in two or more respectively with it is described enter Liquid house steward (2) and described time liquid house steward (3) connection, enable a fluid to pass through electricity described in two or more from the feed liquor house steward (2) Sub- expansion valve (1) flows into described time liquid house steward (3).
- 2. electronic expansion valve module according to claim 1, it is characterised in that：Also include feed tube (4)；The feed tube (4) is connected with the feed liquor house steward (2), external fluid is inputted institute by the feed tube (4) State feed liquor house steward (2)；First filter (41) is provided with the feed tube (4), is entered to be filtered through described in the feed tube (4) entrance The fluid of liquid house steward (2).
- 3. electronic expansion valve module according to claim 1, it is characterised in that：Also include liquid back pipe (5)；The liquid back pipe (5) is connected with described time liquid house steward (3), the fluid returned in liquid house steward (3) is passed through described Liquid back pipe (5) flows out；The second filter (51) is provided with the liquid back pipe (5), to be filtered through the stream of the liquid back pipe (5) outflow Body.
- 4. the electronic expansion valve module according to claims 1 to 3 any one, it is characterised in that：Also include installing plate (6)；The electric expansion valve (1) is connected on the installing plate (6).
- 5. electronic expansion valve module according to claim 4, it is characterised in that：The first connecting tube (31), quantity and the electricity of first connecting tube (31) are provided with described time liquid house steward (3) The quantity of sub- expansion valve (1) is identical and corresponds, and makes electric expansion valve described in two or more (1) respectively by corresponding First connecting tube (31) is connected to described return on liquid house steward (3)；At least two first connecting tubes (31) are connected on the installing plate (6), and the electric expansion valve (1) is connected On the installing plate (6)；And/or the second connecting tube (21) is provided with the feed liquor house steward (2), the quantity of second connecting tube (21) with The quantity of the electric expansion valve (1) is identical and corresponds, make electric expansion valve described in two or more (1) respectively by with its Corresponding second connecting tube (21) is connected in the feed liquor house steward (2)；At least two second connecting tubes (21) are connected on the installing plate (6), and the electric expansion valve (1) is connected On the installing plate (6).
- 6. electronic expansion valve module according to claim 5, it is characterised in that：Also include the first support (61) and at least two first pipe clamps (62) being fixedly connected on the installing plate (6)；At least two first pipe clamps (62) are connected by screw in the first support (61), and can be with described first Support (61) respectively grips at least two first connecting tubes (31) or at least two second connecting tubes (21).
- 7. electronic expansion valve module according to claim 4, it is characterised in that：When including feed tube (4), in addition to the second support (63) being fixedly connected on the installing plate (6) and the second pipe clamp (64)；Second pipe clamp (64) is connected by screw in the second support (63), and can be with the second support (63) The feed tube (4) is gripped.
- 8. electronic expansion valve module according to claim 4, it is characterised in that：When including liquid back pipe (5), in addition to the 3rd support (65) being fixedly connected on the installing plate (6) and the 3rd pipe clamp (66)；3rd pipe clamp (66) is connected by screw on the 3rd support (65), and can be with the 3rd support (65) The liquid back pipe (5) is gripped.
- 9. electronic expansion valve module according to claim 4, it is characterised in that：Also include upper lid；The upper lid is detachably connected on the installing plate (6), and with the installing plate (6) is collectively forming to accommodate described The accommodation space of electric expansion valve (1).
- 10. electronic expansion valve module according to claim 9, it is characterised in that：The insulation material to be incubated for the electric expansion valve (1) is filled in the accommodation space.
- A kind of 11. air-conditioning system, it is characterised in that：Including the electronic expansion valve module (7) described in claim 1 to 10 any one.
- 12. air-conditioning system according to claim 11, it is characterised in that：Including combination sideboard air-treatment unit (8) and indoor set (9)；The combination sideboard air-treatment unit (8) is connected by the electronic expansion valve module (7) with the indoor set (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710661209.6A CN107449186A (en) | 2017-08-04 | 2017-08-04 | Electronic expansion valve assembly and air conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710661209.6A CN107449186A (en) | 2017-08-04 | 2017-08-04 | Electronic expansion valve assembly and air conditioning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107449186A true CN107449186A (en) | 2017-12-08 |
Family
ID=60490800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710661209.6A Pending CN107449186A (en) | 2017-08-04 | 2017-08-04 | Electronic expansion valve assembly and air conditioning system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107449186A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201844629U (en) * | 2010-09-16 | 2011-05-25 | 麦克维尔空调制冷(武汉)有限公司 | Cold water heat pump unit with structure of dual expansion valves |
| CN202420047U (en) * | 2011-12-15 | 2012-09-05 | 同方人工环境有限公司 | Double thermostatic expansion valve structure |
| WO2017071289A1 (en) * | 2015-10-27 | 2017-05-04 | 广东美的暖通设备有限公司 | Enhanced vapor injection air conditioning system |
| CN207365516U (en) * | 2017-08-04 | 2018-05-15 | 珠海格力电器股份有限公司 | Electronic expansion valve assembly and air conditioning system |
-
2017
- 2017-08-04 CN CN201710661209.6A patent/CN107449186A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201844629U (en) * | 2010-09-16 | 2011-05-25 | 麦克维尔空调制冷(武汉)有限公司 | Cold water heat pump unit with structure of dual expansion valves |
| CN202420047U (en) * | 2011-12-15 | 2012-09-05 | 同方人工环境有限公司 | Double thermostatic expansion valve structure |
| WO2017071289A1 (en) * | 2015-10-27 | 2017-05-04 | 广东美的暖通设备有限公司 | Enhanced vapor injection air conditioning system |
| CN207365516U (en) * | 2017-08-04 | 2018-05-15 | 珠海格力电器股份有限公司 | Electronic expansion valve assembly and air conditioning system |
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