CN111765671B - Two-way circulation expansion valve and device with same - Google Patents
Two-way circulation expansion valve and device with same Download PDFInfo
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- CN111765671B CN111765671B CN201910262042.5A CN201910262042A CN111765671B CN 111765671 B CN111765671 B CN 111765671B CN 201910262042 A CN201910262042 A CN 201910262042A CN 111765671 B CN111765671 B CN 111765671B
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Abstract
The invention provides a bidirectional circulation expansion valve and a device with the same. The two-way circulation expansion valve includes: a valve tube; the communicating piece is fixedly arranged in the valve pipe and divides an inner cavity of the valve pipe into a first valve cavity and a second valve cavity, a first connecting cavity is arranged at one end, close to the first valve cavity, of the communicating piece, a second connecting cavity is arranged at one end, close to the second valve cavity, of the communicating piece, a first channel and a second channel are arranged on the communicating piece, the first channel is used for communicating the second valve cavity with the first connecting cavity, and the second channel is used for communicating the first valve cavity with the second connecting cavity; the first one-way expansion valve is fixedly connected to the first connecting chamber; and the second one-way expansion valve is fixedly connected to the second connecting cavity. The bidirectional circulation expansion valve is simple and quick to assemble, has few parts and greatly reduces the production cost of the bidirectional circulation expansion valve.
Description
Technical Field
The invention relates to the technical field of control devices, in particular to a bidirectional circulation expansion valve and a device with the same.
Background
The expansion valve is mainly applied to an air-conditioning refrigeration system and is an important component of the refrigeration system. The expansion valve enables a medium-high temperature high-pressure liquid refrigerant to be low-temperature low-pressure wet steam through throttling, then the refrigerant absorbs heat in the evaporator to achieve a refrigeration effect, and the expansion valve controls the flow of the valve through the change of the superheat degree of the tail end of the evaporator to prevent the phenomena of insufficient utilization of the area of the evaporator and cylinder knocking. The bidirectional circulation expansion valve is mainly applied to a cooling and heating type air conditioning system, and two expansion valve components are arranged in parallel or in series to realize a bidirectional circulation function.
The existing bidirectional circulation expansion valve has more parts, complex assembly process and high production cost.
Disclosure of Invention
The invention mainly aims to provide a bidirectional flow expansion valve and a device with the same, so as to solve the problems of more parts and high production cost of the bidirectional flow expansion valve in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided a bidirectional flow-through expansion valve comprising: a valve tube; the communicating piece is fixedly arranged in the valve pipe and divides an inner cavity of the valve pipe into a first valve cavity and a second valve cavity, a first connecting cavity is arranged at one end, close to the first valve cavity, of the communicating piece, a second connecting cavity is arranged at one end, close to the second valve cavity, of the communicating piece, a first channel and a second channel are arranged on the communicating piece, the first channel is used for communicating the second valve cavity with the first connecting cavity, and the second channel is used for communicating the first valve cavity with the second connecting cavity; the first one-way expansion valve is fixedly connected to the first connecting chamber; and the second one-way expansion valve is fixedly connected to the second connecting chamber.
Further, the joint of the first one-way expansion valve and the first connection chamber is sealed by a first sealing member.
Further, the joint of the second one-way expansion valve and the second connection chamber is sealed by a second sealing member.
Further, the first one-way expansion valve is fixedly connected at the first connection chamber by a thread or a welding or a screw or a pin.
Further, the second one-way expansion valve is fixedly connected at the second connection chamber by a thread or a welding or a screw or a pin.
Further, the communicating piece, the first one-way expansion valve and the second one-way expansion valve are coaxially arranged.
Furthermore, the communicating piece is of a columnar structure, an annular outer boss is arranged at the middle section of the outer portion of the columnar structure, a limiting protrusion is arranged on one of the outer side wall surface of the annular outer boss and the inner wall surface of the valve pipe, and a limiting groove matched with the limiting protrusion is arranged on the other of the outer side wall surface and the inner wall surface of the valve pipe.
Further, the first end of the communicating piece is provided with a first connecting section, the first connecting section is inserted into the first valve cavity, the first connecting cavity is arranged on the first connecting section, and a first gap is formed between the outer wall surface of the first connecting section and the inner wall surface of the valve pipe; the first port of the second channel is located on the outer wall surface of the first connecting section and communicated with the first gap, and the second port of the second channel is communicated with the first connecting chamber.
Further, a second end of the communicating piece is provided with a second connecting section, the second connecting section is inserted into the second valve cavity, the second connecting cavity is arranged on the second connecting section, and a second gap is formed between the outer wall surface of the second connecting section and the inner wall surface of the valve pipe; the first port of the first channel is located on the outer wall surface of the second connecting section and is communicated with the second gap, and the second port of the first channel is communicated with the second connecting chamber.
Further, the first one-way expansion valve includes: the first valve seat is provided with a first cavity, a first valve port and a second valve port, the first valve port and the second valve port are respectively arranged at two ends of the first cavity and communicated with the first cavity, and the second valve port is arranged close to the first connecting cavity; a first valve needle mounted within the first cavity for opening or closing the first valve port; a first seal head disposed at the second valve port to open or close the second valve port; and two ends of the first elastic element respectively abut against the first valve needle and the first seal head.
Further, the second one-way expansion valve includes: the second valve seat is provided with a second cavity, a third valve port and a fourth valve port, the third valve port and the fourth valve port are respectively arranged at two ends of the second cavity and communicated with the second cavity, and the fourth valve port is arranged close to the second connecting chamber; a second valve needle installed in the second cavity, the second valve needle being used to open or close the third port; the second sealing head is arranged at the fourth valve port to open or close the fourth valve port; and two ends of the second elastic element respectively abut against the second valve needle and the second seal head.
According to another aspect of the present invention, there is provided an apparatus comprising a two-way flow-through expansion valve as described above.
By applying the technical scheme of the invention, in actual work, fluid can enter the second channel from the first valve cavity, then enter the second connecting cavity, then enter the second one-way expansion valve and finally enter the second valve cavity; fluid may also pass from the second valve chamber into the first passage, into the first connecting chamber, then into the first one-way expansion valve, and finally into the first valve chamber. Therefore, the two-way circulation expansion valve can realize two-way circulation work through the valve pipe, the communicating piece, the first one-way expansion valve and the second one-way expansion valve, during actual assembly, only the communicating piece is required to be installed in the valve pipe, and the first one-way expansion valve and the second one-way expansion valve are respectively installed at two ends of the communicating piece, so that the assembly is simple and rapid, the parts are few, and the production cost of the two-way circulation expansion valve is greatly reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 schematically shows a cross-sectional view of a two-way flow-through expansion valve of the present invention;
FIG. 2 schematically illustrates a cross-sectional view of a communication of the present invention;
FIG. 3 schematically illustrates a top view of the communication member of the present invention;
FIG. 4 schematically illustrates a cross-sectional view of a first or second valve seat of the present invention;
figure 5 schematically shows a front view of the first and second valve needles of the present invention.
Wherein the figures include the following reference numerals:
10. a valve tube; 11. a first valve chamber; 111. a first gap; 12. a second valve cavity; 121. a second gap; 13. a limiting bulge; 20. a communication member; 21. a first connection chamber; 22. a second connection chamber; 23. a first channel; 24. a second channel; 25. an annular outer boss; 251. a limiting groove; 26. a first connection section; 27. a second connection section; 30. a first one-way expansion valve; 31. a first valve seat; 311. a first cavity; 312. a first valve port; 313. a second valve port; 32. a first valve needle; 33. a first end enclosure; 34. a first elastic element; 40. a second one-way expansion valve; 41. a second valve seat; 411. a second cavity; 412. a third valve port; 413. a fourth valve port; 42. a second valve needle; 43. a second end enclosure; 44. a second elastic element; 50. a first seal member; 60. a second seal.
Detailed Description
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.
Referring to fig. 1 to 5, according to an embodiment of the present invention, there is provided a two-way flow-through expansion valve, which includes a valve pipe 10, a communicating member 20, a first one-way expansion valve 30, and a second one-way expansion valve 40, wherein the communicating member 20 is fixedly installed in the valve pipe 10 and divides an inner cavity of the valve pipe 10 into a first valve cavity 11 and a second valve cavity 12, one end of the communicating member 20 close to the first valve cavity 11 is provided with a first connection chamber 21, one end of the communicating member 20 close to the second valve cavity 12 is provided with a second connection chamber 22, the communicating member 20 is provided with a first passage 23 and a second passage 24, the first passage 23 is used for communicating the second valve cavity 12 with the first connection chamber 21, and the second passage 24 is used for communicating the first valve cavity 11 with the second connection chamber 22; the first one-way expansion valve 30 is fixedly connected at the first connection chamber 21; the second one-way expansion valve 40 is fixedly connected at the second connection chamber 22.
In actual operation, fluid can enter the second passage 24 from the first valve chamber 11, then enter the second connecting chamber 22, then enter the second one-way expansion valve 40, and finally enter the second valve chamber 12; fluid may also pass from second valve chamber 12 into first passage 23, into first connecting chamber 21, then into first one-way expansion valve 30, and finally into first valve chamber 11. It can be seen that the two-way circulation expansion valve in this embodiment can implement two-way circulation work through the valve pipe 10, the communicating member 20, the first one-way expansion valve 30 and the second one-way expansion valve 40, and in actual assembly, only the communicating member 20 needs to be installed in the valve pipe 10, and the first one-way expansion valve 30 and the second one-way expansion valve 40 need to be installed at two ends of the communicating member 20, so that the assembly is simple and fast, the number of parts is small, and the production cost of the two-way circulation expansion valve is greatly reduced.
Specifically, the first one-way expansion valve 30 in the present embodiment includes a first valve seat 31, a first valve needle 32, a first sealing head 33, and a first elastic element 34, wherein the first valve seat 31 is provided with a first cavity 311, a first valve port 312, and a second valve port 313, the first valve port 312 and the second valve port 313 are respectively disposed at two ends of the first cavity 311 and communicate with the first cavity 311, and the second valve port 313 is disposed near the first connection chamber 21; the first valve needle 32 is installed in the first cavity 311, and the first valve needle 32 is used for opening or closing the first valve port 312; the first sealing head 33 is provided at the second valve port 313 to open or close the second valve port 313; the two ends of the first elastic element 34 respectively abut against the first valve needle 32 and the first sealing head 33, and the first elastic element 34 is preferably a spring, and may also be an elastic rubber column or the like.
Similarly, the second one-way expansion valve 40 in the present embodiment comprises a second valve seat 41, a second valve needle 42, a second sealing head 43 and a second elastic element 44, wherein the second valve seat 41 is provided with a second cavity 411, a third valve port 412 and a fourth valve port 413, the third valve port 412 and the fourth valve port 413 are respectively arranged at two ends of the second cavity 411 and are communicated with the second cavity 411, and the fourth valve port 413 is arranged close to the second connection chamber 22; the second valve needle 42 is installed in the second cavity 411, and the second valve needle 42 is used for opening or closing the third valve port 412; the second sealing head 43 is arranged at the fourth valve port 413 to open or close the fourth valve port 413; the two ends of the second elastic element 44 respectively abut against the second valve needle 42 and the second sealing head 43, and the second elastic element 44 is preferably a spring, and may also be an elastic rubber column or the like.
In actual operation, the two-way circulation of the two-way circulation expansion in this embodiment is performed separately, and the first one-way expansion valve 30 and the second one-way expansion valve 40 are independently controlled, so that the adjustment precision is high, and the service life is longer.
In order to improve the sealing performance of the two-way flow-through expansion valve in the present embodiment, the junction of the first one-way expansion valve 30 and the first connection chamber 21 in the present embodiment is sealed by the first seal member 50; correspondingly, the joint of the second one-way expansion valve 40 and the second connecting chamber 22 is sealed by the second sealing member 60, so that the problem of poor sealing performance of the linear arrangement is solved.
Preferably, the first sealing element 50 and the second sealing element 60 in the present embodiment may be sealing rings, sealing strips, and other modifications of the structure within the spirit of the present invention are within the scope of the present invention.
Preferably, the first one-way expansion valve 30 in this embodiment is fixedly connected to the first connection chamber 21 through a screw thread, which may play a certain sealing role, and during actual connection, the connection screw thread may be disposed on an inner wall of the first connection chamber 21, and may also be disposed on an outer wall surface of the communication member 20. Of course, the first one-way expansion valve 30 in other embodiments of the present invention may also be fixedly connected to the first connection chamber 21 by welding or fasteners such as screws or pins, and other modifications within the scope of the present invention are also within the spirit of the present invention.
Preferably, the second one-way expansion valve 40 in this embodiment is fixedly connected to the second connection chamber 22 through a screw thread, which may play a certain sealing role, and in actual connection, the connection screw thread may be disposed on the inner wall of the second connection chamber 22, and may also be disposed on the outer wall surface of the communicating member 20. Of course, in other embodiments of the present invention, the second one-way expansion valve 40 may also be fixedly connected to the second connection chamber 22 by welding or screws or pins, and any other modifications under the concept of the present invention are within the scope of the present invention.
Referring to fig. 1 to 5 again, the communication member 20, the first one-way expansion valve 30, and the second one-way expansion valve 40 in the present embodiment are coaxially disposed, and a linear arrangement component is adopted to implement two-way communication with parallel connection property, so that the problem of large space occupation in the parallel connection mode is solved.
UNICOM's piece 20 in this embodiment is the columnar structure, and columnar structure's outside middle section is provided with outer boss 25 of annular, is provided with spacing arch 13 on the outside wall of outer boss 25 of annular and the internal face of valve pipe 10 one of the two, is provided with the spacing recess 251 with spacing arch 13 looks adaptation on the other of the two, is convenient for fix a position UNICOM's piece 20, and simple structure is convenient for realize.
Specifically, the first end of the communication member 20 has a first connection section 26, the first connection section 26 is inserted into the first valve chamber 11, the first connection chamber 21 is disposed on the first connection section 26, and a first gap 111 is formed between the outer wall surface of the first connection section 26 and the inner wall surface of the valve tube 10; in practical design, the first port of the second passage 24 is located on the outer wall surface of the first connecting section 26 and communicates with the first gap 111, and the second port of the second passage 24 communicates with the first connecting chamber 21, so that the space occupancy rate of the two-way flow valve in the present embodiment can be further reduced.
Correspondingly, the second end of the communicating member 20 has a second connecting section 27, the second connecting section 27 is inserted into the second valve cavity 12, the second connecting chamber 22 is arranged on the second connecting section 27, and a second gap 121 is formed between the outer wall surface of the second connecting section 27 and the inner wall surface of the valve tube 10; the first port of the first passage 23 is located on the outer wall surface of the second connecting section 27 and communicates with the second gap 121, and the second port of the first passage 23 communicates with the second connecting chamber 22, which can further reduce the space occupancy rate of the two-way circulation valve in the present embodiment.
According to another aspect of the present invention, there is provided an apparatus, which may be an air conditioner or the like, comprising a two-way flow expansion valve, which is the two-way flow expansion valve described above.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the bidirectional circulation expansion valve is simpler in structure and easier to realize, realizes bidirectional circulation with parallel property by adopting a linear arrangement part form, solves the problem of large occupied space of the parallel connection form, and also solves the problem of poor sealing performance of linear arrangement; the number of used parts is small, the assembly process is simple, automatic production is easy to realize, and the cost is low; the two-way circulation flows through the two-way expansion valve respectively, the two one-way expansion valves are independently regulated and controlled, the regulation precision is high, and the service life is longer.
Spatially relative terms, such as "above … …," "above … …," "above … … surface," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A bi-directional flow-through expansion valve comprising:
a valve tube (10);
the communicating piece (20) is fixedly installed in the valve pipe (10) and divides an inner cavity of the valve pipe (10) into a first valve cavity (11) and a second valve cavity (12), a first connecting cavity (21) is arranged at one end, close to the first valve cavity (11), of the communicating piece (20), a second connecting cavity (22) is arranged at one end, close to the second valve cavity (12), of the communicating piece (20), a first passage (23) and a second passage (24) are arranged on the communicating piece (20), the first passage (23) is used for communicating the second valve cavity (12) with the first connecting cavity (21), and the second passage (24) is used for communicating the first valve cavity (11) with the second connecting cavity (22);
a first one-way expansion valve (30), the first one-way expansion valve (30) being fixedly connected at the first connection chamber (21);
a second one-way expansion valve (40), the second one-way expansion valve (40) being fixedly connected at the second connection chamber (22);
the communicating piece (20), the first one-way expansion valve (30) and the second one-way expansion valve (40) are coaxially arranged;
the first end of the communicating piece (20) is provided with a first connecting section (26), the first connecting section (26) is inserted into the first valve cavity (11), the first connecting cavity (21) is arranged on the first connecting section (26), and a first gap (111) is formed between the outer wall surface of the first connecting section (26) and the inner wall surface of the valve pipe (10);
a first port of the second passage (24) is located on an outer wall surface of the first connection section (26) and communicates with the first gap (111), and a second port of the second passage (24) communicates with the first connection chamber (21).
2. A two-way flow-through expansion valve according to claim 1, wherein the connection of the first one-way expansion valve (30) with the first connection chamber (21) is sealed by a first seal (50).
3. A two-way flow-through expansion valve according to claim 1, wherein the junction of the second one-way expansion valve (40) with the second connection chamber (22) is sealed by a second seal (60).
4. A two-way flow-through expansion valve according to claim 1, wherein the first one-way expansion valve (30) is fixedly connected at the first connection chamber (21) by means of threads or welding or screws or pins.
5. A two-way flow-through expansion valve according to claim 1, wherein the second one-way expansion valve (40) is fixedly connected at the second connection chamber (22) by means of threads or welding or screws or pins.
6. A two-way circulation expansion valve according to any one of claims 1 to 5, wherein the communicating member (20) has a columnar structure, an annular outer protrusion (25) is provided at an outer middle section of the columnar structure, a position-limiting protrusion (13) is provided on one of an outer side wall surface of the annular outer protrusion (25) and an inner wall surface of the valve tube (10), and a position-limiting groove (251) adapted to the position-limiting protrusion (13) is provided on the other.
7. A two-way flow-through expansion valve according to claim 1, wherein the second end of the communication member (20) has a second connection section (27), the second connection section (27) is inserted into the second valve chamber (12), the second connection chamber (22) is provided on the second connection section (27), and a second gap (121) is provided between an outer wall surface of the second connection section (27) and an inner wall surface of the valve tube (10);
the first port of the first passage (23) is located on the outer wall surface of the second connecting section (27) and communicates with the second gap (121), and the second port of the first passage (23) communicates with the second connecting chamber (22).
8. A two-way flow-through expansion valve according to claim 2, wherein the first one-way expansion valve (30) comprises:
a first valve seat (31), wherein a first cavity (311), a first valve port (312) and a second valve port (313) are arranged on the first valve seat (31), the first valve port (312) and the second valve port (313) are respectively arranged at two ends of the first cavity (311) and communicated with the first cavity (311), and the second valve port (313) is arranged close to the first connecting chamber (21);
a first valve needle (32), the first valve needle (32) being mounted within the first cavity (311), the first valve needle (32) being for opening or closing the first valve port (312);
a first seal head (33), the first seal head (33) being disposed at the second valve port (313) to open or close the second valve port (313);
the two ends of the first elastic element (34) respectively abut against the first valve needle (32) and the first sealing head (33).
9. A bi-directional flow-through expansion valve according to claim 3, wherein the second one-way expansion valve (40) comprises:
a second valve seat (41), wherein a second cavity (411), a third valve port (412) and a fourth valve port (413) are arranged on the second valve seat (41), the third valve port (412) and the fourth valve port (413) are respectively arranged at two ends of the second cavity (411) and are communicated with the second cavity (411), and the fourth valve port (413) is arranged close to the second connecting chamber (22);
a second valve needle (42), the second valve needle (42) being mounted in the second cavity (411), the second valve needle (42) being for opening or closing the third valve port (412);
a second head (43), the second head (43) being disposed at the fourth valve port (413) to open or close the fourth valve port (413);
and two ends of the second elastic element (44) respectively abut against the second valve needle (42) and the second sealing head (43).
10. An apparatus comprising a two-way flow-through expansion valve, wherein the two-way flow-through expansion valve is a two-way flow-through expansion valve as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910262042.5A CN111765671B (en) | 2019-04-02 | 2019-04-02 | Two-way circulation expansion valve and device with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910262042.5A CN111765671B (en) | 2019-04-02 | 2019-04-02 | Two-way circulation expansion valve and device with same |
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| CN111765671A CN111765671A (en) | 2020-10-13 |
| CN111765671B true CN111765671B (en) | 2022-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910262042.5A Active CN111765671B (en) | 2019-04-02 | 2019-04-02 | Two-way circulation expansion valve and device with same |
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| JP2009014292A (en) * | 2007-07-06 | 2009-01-22 | Zhejiang Chunhui Intelligent Control Co Ltd | Two throttle two-way expansion valve with filtering structure |
| CN202420048U (en) * | 2012-01-16 | 2012-09-05 | 新昌县富士精工科技有限公司 | Bidirectional throttling valve |
| CN202420050U (en) * | 2012-01-17 | 2012-09-05 | 新昌县富士精工科技有限公司 | Bidirectional throttle valve for air conditioner |
| CN102878733A (en) * | 2012-10-26 | 2013-01-16 | 温岭市恒发空调部件有限公司 | Expansion valve components, one-way expansion valve and two-way circulation expansion valve |
| CN207214537U (en) * | 2017-07-28 | 2018-04-10 | 温岭市恒发空调部件有限公司 | A kind of expansion valve |
| CN109539642A (en) * | 2019-01-18 | 2019-03-29 | 奥克斯空调股份有限公司 | A kind of adaptive throttling device and air conditioner |
-
2019
- 2019-04-02 CN CN201910262042.5A patent/CN111765671B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009014292A (en) * | 2007-07-06 | 2009-01-22 | Zhejiang Chunhui Intelligent Control Co Ltd | Two throttle two-way expansion valve with filtering structure |
| CN202420048U (en) * | 2012-01-16 | 2012-09-05 | 新昌县富士精工科技有限公司 | Bidirectional throttling valve |
| CN202420050U (en) * | 2012-01-17 | 2012-09-05 | 新昌县富士精工科技有限公司 | Bidirectional throttle valve for air conditioner |
| CN102878733A (en) * | 2012-10-26 | 2013-01-16 | 温岭市恒发空调部件有限公司 | Expansion valve components, one-way expansion valve and two-way circulation expansion valve |
| CN207214537U (en) * | 2017-07-28 | 2018-04-10 | 温岭市恒发空调部件有限公司 | A kind of expansion valve |
| CN109539642A (en) * | 2019-01-18 | 2019-03-29 | 奥克斯空调股份有限公司 | A kind of adaptive throttling device and air conditioner |
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| Publication number | Publication date |
|---|---|
| CN111765671A (en) | 2020-10-13 |
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