CN111677901B - Four-way valve and air conditioner - Google Patents

Four-way valve and air conditioner Download PDF

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Publication number
CN111677901B
CN111677901B CN202010440088.4A CN202010440088A CN111677901B CN 111677901 B CN111677901 B CN 111677901B CN 202010440088 A CN202010440088 A CN 202010440088A CN 111677901 B CN111677901 B CN 111677901B
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CN
China
Prior art keywords
way valve
valve
connecting frame
sliding block
sealing
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.)
Active
Application number
CN202010440088.4A
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Chinese (zh)
Other versions
CN111677901A (en
Inventor
周伟伟
甘威
黎长源
杨守武
曾启明
李晓芳
高鹏
杨勋雷
吴彬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
Gree Hefei Electric Appliances Co Ltd
Original Assignee
Gree Electric Appliances Inc of Zhuhai
Gree Hefei Electric Appliances Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gree Electric Appliances Inc of Zhuhai, Gree Hefei Electric Appliances Co Ltd filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN202010440088.4A priority Critical patent/CN111677901B/en
Publication of CN111677901A publication Critical patent/CN111677901A/en
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Publication of CN111677901B publication Critical patent/CN111677901B/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
    • F16K3/30—Details
    • F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • F16K11/0655—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with flat slides
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/06—Damage
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/22—Preventing, detecting or repairing leaks of refrigeration fluids
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Abstract

The invention provides a four-way valve sliding block structure, a four-way valve comprising the same and an air conditioner. The four-way valve sliding block structure comprises a sliding block body, wherein an upward convex part and plane parts positioned on two sides of the convex part are formed on the top surface of the sliding block body; the slider body is provided with supporting blocks which are in a lug structure distributed on the plane parts on two sides of the protruding part; the height of the bump structure is smaller than that of the protruding part. According to the four-way valve, the supporting block is arranged on the slider body of the slider of the four-way valve, and the supporting block provides supporting force for the connecting frame in the four-way valve under partial working conditions, so that the connecting frame, namely a sealing element, is prevented from being damaged by impact force, and the reliability of the four-way valve is improved.

Description

Four-way valve and air conditioner
Technical Field
The invention relates to the technical field of four-way valves, in particular to a four-way valve slide block structure, a four-way valve comprising the same and an air conditioner.
Background
The four-way valve plays an important part for cold and hot switching in the air conditioner, and the reliability of the four-way valve determines the service life of the air conditioner. The four-way valve can not normally operate after a fault occurs, the most common problem of the four-way valve is mainly that the four-way valve has a liquid impact fault, namely, a sliding block of the four-way valve inevitably passes through the absolute middle position of a valve body in the actual reversing process, the E, S, C pipes of the valve body are completely sealed by the whole sliding block, so that the pressure cannot be leaked, especially, a liquid refrigerant sprayed by a compressor is difficult to compress in a liquid state, so that a connecting rod is stressed and tilted, sealing bowls at two ends of the connecting rod are easily influenced by moment to incline, and then the sealing bowl is directly broken under the transverse acting force of the liquid refrigerant, so that the air conditioner cannot normally operate.
Disclosure of Invention
In view of this, the present invention provides a four-way valve slider structure, a four-way valve including the same, and an air conditioner, which are at least used for solving the technical problem of poor impact resistance of a four-way valve sealing element in the prior art, and specifically:
in a first aspect, the invention provides a four-way valve slider structure, which comprises a slider body, wherein an upward convex part and plane parts positioned on two sides of the convex part are formed on the top surface of the slider body;
the slider body is provided with supporting blocks which are in a lug structure distributed on the plane parts on two sides of the protruding part;
the height of the bump structure is smaller than that of the protruding portion.
Further optionally, the support blocks are symmetrically arranged on both sides of the protruding portion of the top surface.
Further optionally, the top of the support block is spherically or arcuately shaped.
Further optionally, the support block is constructed as a unitary structure with the slider body.
In a second aspect, the present invention provides a four-way valve comprising:
the valve comprises a valve body, a valve cavity and four ports, wherein the valve cavity and the four ports are formed in the valve body;
and disposed within the valve chamber:
the sealing assembly comprises two sealing pieces which are in sliding sealing contact with the inner wall of the valve cavity;
the connecting frame is arranged between the two sealing pieces and is simultaneously connected with the two sealing pieces;
according to the four-way valve sliding block structure, the four-way valve sliding block structure is arranged on the lower side of the connecting frame in a sliding mode, the four-way valve sliding block and the connecting frame move synchronously, and the flow channel in the sliding block body is communicated with different ports on the valve body and used for changing the communication relation among the four ports.
Further optionally, a support block is located on the lower side of the connecting frame and can contact with the connecting frame to support the connecting frame.
Further optionally, the connecting frame is disconnected from the support block when gas is circulated in the valve chamber.
Further optionally, the distance between the support block and the connecting frame is 1.5mm-2.5 mm.
Further optionally, the connecting frame contacts at least a portion of the support block when liquid is circulated within the valve cavity.
Further optionally, a through hole is formed in the connecting frame, and a top surface protruding portion of the slider body penetrates out of the upper side of the connecting frame through the through hole from the lower side of the connecting frame, so that the slider body and the connecting frame move synchronously.
In a third aspect, the present invention provides an air conditioner, including the above four-way valve, where the four-way valve is connected to a refrigeration system of the air conditioner, and is configured to switch a flow direction of a refrigerant in the refrigeration system.
According to the four-way valve, the supporting block is arranged on the slider body of the slider of the four-way valve, and the supporting block provides supporting force for the connecting frame in the four-way valve under partial working conditions, so that the connecting frame, namely a sealing element, is prevented from being damaged by impact force, and the reliability of the four-way valve is improved.
Drawings
The above and other objects, features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings. The drawings described below are merely some embodiments of the present disclosure, and other drawings may be derived from those drawings by those of ordinary skill in the art without inventive effort.
FIG. 1 shows a schematic diagram of a slider for a four-way valve in one embodiment of the present invention;
FIG. 2 shows a schematic diagram of a four-way valve according to an embodiment of the present invention.
In the figure:
10-a slider body; 11-a boss; 12-plane section; 13-a support block; 20-a valve body; 21-a first port; 22-a second port; 23-a third port; 24-a fourth port; 31-a seal; 40-connecting frame.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and "a" and "an" generally include at least two, but do not exclude at least one, unless the context clearly dictates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
According to the four-way valve, the supporting block is arranged on the sliding block of the four-way valve, so that when the liquid fluid causes large impact on the connecting frame in an extremely cold environment, the supporting block supports the connecting frame, the sealing assembly is prevented from deforming to cause sealing failure due to large stress deformation of the connecting frame, the operation reliability of the four-way valve is improved, and particularly the operation reliability in the extremely cold environment is improved. The invention is described below with reference to specific embodiments.
Example 1
As shown in fig. 1, in the present embodiment, the present invention provides a four-way valve slider structure, which is slidably disposed in a valve body 20 of the four-way valve, and changes a communication state between at least a portion of ports of the four-way valve and a valve chamber by sliding, and at the same time, the four-way valve slider is linked with a sealing assembly. Specifically, the method comprises the following steps:
the four-way valve sliding block structure comprises a sliding block body 10, a flow channel is formed inside the sliding block body 10, and the sliding block body 10 enables the flow channel to be communicated with different ports on a valve body through sliding so as to change the communication state of the ports and a valve cavity. Specifically, the slider body 10 is configured as a shell-like structure in which a cavity is formed inside and the bottom is open, the top surface of the slider body 10 includes a protruding portion 11 formed upward, and planar portions 12 formed on both sides of the protruding portion 11, preferably, the protruding portion 11 is formed at a middle position, and the planar portions 12 are symmetrically formed at both sides of the protruding portion 11. Preferably, the protrusion 11 formed in the middle of the top surface of the slider body 10 is an arc surface, so that the inner wall of the cavity corresponding to the protrusion is configured as an arc surface, thereby guiding the fluid and reducing the impact force when the inner wall of the fluid contacts, and meanwhile, the outer wall of the slider body is also an arc surface, which has less resistance to the flow of the fluid outside.
The slider body 10 is provided with a support block 13, the support block 13 is configured as a bump structure formed by two plane portions 12 on the top surface of the slider body 10, the height of the bump structure is smaller than that of the protruding portion 11, the support block 13 is provided on each of the two plane portions 12, preferably, the support blocks 13 are symmetrically provided on both sides of the protruding portion 11 on the top surface, and further, the support blocks 13 are provided in plurality on both sides of the protruding portion 11, namely, on each of the two plane portions 12.
In this embodiment, two supporting blocks 13 are disposed on each plane portion 12, and the two supporting blocks 13 are disposed at a position away from the protruding portion 11 with a certain distance therebetween, so that the contact points of the supporting blocks 13 and the connecting frame 40 are closer to the two end positions of the connecting frame 40, and the moment of the connecting frame 40 at the supporting points is increased, so as to reduce the influence of the impact force received by the connecting rod. Preferably, the top of the supporting block 13 is a spherical surface or an arc surface, or the edge of the supporting block 13 may be provided with a fillet, a chamfer or other structures, so that the contact area between the supporting block 13 and the connecting frame 40 in the state of supporting the connecting frame 40 is small, and stress concentration at the contact position is avoided.
Preferably, the support block 13 is constructed as an integral structure with the slider body 10, for example, it may be connected as an integral structure by welding, bonding, etc., or the slider body 10 and the support block 13 are integrally injection molded.
In this embodiment, the supporting blocks 13 are disposed on the slider body 10, so as to provide a supporting force for the connecting frame 40 between the sealing elements 31 under special conditions, and prevent the sealing element 31 from failing due to deformation of the supporting frame caused by impact force.
Example 2
As shown in fig. 2, in this embodiment, the present invention provides a four-way valve, including: the valve body 20, the seal assembly connecting frame 40 and the four-way valve slider structure in the above embodiments, the seal assembly connecting frame 40 and the four-way valve slider structure are disposed in the valve body 20. Specifically, the method comprises the following steps:
the valve body 20, the valve body 20 is configured as a tubular structure, a valve cavity is formed inside the valve body 20, a first port 21 communicated with the valve cavity is arranged at the upper side of the valve body 20, and a second port 22, a third port 23 and a fourth port 24 communicated with the valve cavity are arranged at the lower side of the valve body 20 side by side.
The sealing assembly comprises two sealing pieces 31 in sliding sealing contact with the inner wall of the valve cavity, the two sealing pieces 31 are arranged at a certain distance, the valve cavity is divided into three mutually independent chambers by the two sealing pieces 31, and the first port 21, the second port 22, the third port 23 and the fourth port 24 on the valve body 20 are communicated with the chambers between the two sealing pieces 31.
And the connecting frame 40 is arranged between the two sealing pieces 31 and is simultaneously connected with the two sealing assemblies, and two ends of the connecting frame 40 are respectively and fixedly connected with the two sealing pieces 31 so that the two sealing pieces 31 synchronously move in the valve cavity.
The four-way valve slider structure is slidably disposed at the lower side of the connecting frame 40 and can slide synchronously with the connecting frame 40. The four-way valve sliding block structure is arranged on the bottom wall of the valve cavity in a sliding mode, is in sealing contact with the inner wall of the valve cavity, and can enable the inner cavity of the four-way valve sliding block structure to be communicated with the second port 22 and the third port 23 or the inner cavity of the four-way valve sliding block structure to be communicated with the third port 23 and the fourth port 24 through sliding.
The protruding portion 11 on the top surface of the slider body 10 penetrates out of the lower side of the connecting frame 40 to the upper side of the connecting frame 40, and a hole for the protruding portion 11 to penetrate through is formed in the connecting frame 40, so that the slider body 10 can move synchronously with the connecting frame 40 through the protruding portion 11.
The support block 13 is located at a lower side of the link frame 40 and can contact the link frame 40 to support the link frame 40. Preferably, under a normal working condition, that is, when a refrigerant circulating in a valve cavity of the four-way valve is in a gaseous state, that is, when gas circulates in the valve cavity, the connecting frame 40 does not receive a large impact force, at this time, the connecting frame 40 does not deform or slightly deform so as not to affect the sealing member 31, the supporting block 13 is not in contact with the connecting frame 40, a gap is formed between the connecting frame 40 and the supporting block 13, preferably, the distance between the connecting frame 40 and the supporting block 13 is 1.5mm-2.5mm, when a sliding block of the four-way valve slides, a gap is formed between the supporting block 13 and the connecting frame 40, so that the connecting frame 40 does not apply pressure to the sliding block of the four-way valve, and therefore, an additional frictional force cannot be generated between the sliding block of the four-way valve and the inner wall of the valve cavity when the sliding block of the four-way valve slides, and the normal reversing of the four-way valve cannot be affected.
Under extreme working conditions, such as an extremely cold environment, the refrigerant is in a liquid state, that is, when liquid circulates in the valve cavity, the liquid refrigerant cannot be compressed, enters the valve cavity, acts on the connecting frame 40, and forms impact force on the connecting frame 40, so as to form torque on the sealing element 31. When the connecting frame 40 is deformed by a force, the connecting frame will contact the supporting block 13, and the supporting block 13 applies a reverse torque to the connecting frame 40, so that the connecting frame 40 cannot be deformed continuously, that is, the torque to the sealing member 31 is offset. Meanwhile, the connecting frame 40 is influenced by the impact force of liquid to be reduced, the connecting frame 40 can be guaranteed to have better limit and fixing effect on the sealing element 31, the transverse impact force on the sealing element 31 is reduced, namely the influence of the impact force of the liquid along the axial direction of the valve cavity is avoided, the sealing element 31 is guaranteed not to be deformed or misplaced, and the sealing effect is guaranteed not to be invalid.
Preferably, when the four-way valve slider deflects to the left position of the valve cavity, the connecting frame 40 is contacted with the right supporting block 13, and the right supporting block 13 plays a supporting role; when the four-way valve slide block deviates to the right side of the valve cavity, the connecting frame 40 is contacted with the supporting block 13 on the left side; alternatively, when the four-way valve slider is located at the middle position of the valve chamber, the connecting frame 40 is simultaneously in contact with the support blocks 13 at both sides.
The four-way valve provided by the embodiment is characterized in that the supporting block 13 is arranged on the sliding block of the four-way valve, so that the supporting block can provide supporting force for the connecting frame 40 under the limit working condition, thereby avoiding the sealing failure caused by the deformation or dislocation of the sealing element 31 caused by the stress of the connecting frame 40, improving the reliability of the four-way valve, and particularly improving the sealing reliability under the extremely cold working condition.
Example 3
In this embodiment, the present invention provides an air conditioner, including the four-way valve in embodiment 2, where the four-way valve is connected to a refrigeration system of the air conditioner, and is used to switch a flow direction of a refrigerant in the refrigeration system.
In summary, the four-way valve slider is provided with the supporting structure, so that the four-way valve slider can support the connecting frame 40 between the two sealing members 31, the liquid impact resistance of the sealing members 31 and the connecting frame 40 is improved, the reliability of the four-way valve is improved, particularly the reliability under extremely cold conditions, and the maintenance and replacement frequency is reduced. Similarly, the reliability of a refrigeration system and an air conditioning system using the same can be improved.
Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that the present disclosure is not limited to the precise arrangements, instrumentalities, or instrumentalities described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims (10)

1. A four-way valve, comprising:
the valve comprises a valve body, a valve cavity and four ports, wherein the valve cavity and the four ports are formed in the valve body;
and disposed within the valve chamber:
the sealing assembly comprises two sealing pieces which are in sliding sealing contact with the inner wall of the valve cavity;
the connecting frame is arranged between the two sealing pieces and is simultaneously connected with the two sealing pieces;
the four-way valve sliding block structure is arranged on the lower side of the connecting frame in a sliding mode, the four-way valve sliding block and the connecting frame move synchronously, and a flow channel in the sliding block body is communicated with different ports on the valve body and used for changing the communication relation among the four ports;
the four-way valve sliding block structure comprises a sliding block body,
an upward convex part and plane parts positioned at two sides of the convex part are formed on the top surface of the slider body;
the slider body is provided with supporting blocks which are in a structure of convex blocks distributed on plane parts at two sides of the convex part, and the height of each convex block structure is smaller than that of the convex part;
and two supporting blocks are arranged on each plane part, and the two supporting blocks are arranged at the part far away from the convex part at a certain distance.
2. The four-way valve of claim 1 wherein the support blocks are symmetrically disposed on opposite sides of the raised portion of the top surface.
3. The four-way valve of claim 1 wherein the top spherical or arcuate surface of the support block.
4. The four-way valve of claim 1 wherein the support block is constructed as a unitary structure with the slider body.
5. The four-way valve according to claim 1, wherein a support block is located at a lower side of the connection frame and is capable of contacting the connection frame to support the connection frame.
6. The four-way valve of claim 5 wherein the link bracket is disengaged from the support block when gas is communicated within the valve cavity.
7. The four-way valve of claim 6 wherein the distance between the support block and the link bracket is 1.5mm to 2.5 mm.
8. The four-way valve of claim 6 wherein the link bracket contacts at least a portion of the support block when fluid is communicated within the valve cavity.
9. The four-way valve according to any one of claims 1 to 8, wherein a through hole is formed in the link, and a protrusion on a top surface of the slider body passes through the through hole from a lower side of the link to an upper side of the link to move the slider body and the link in synchronization.
10. An air conditioner, characterized by comprising a four-way valve according to any one of claims 1 to 9, wherein the four-way valve is connected to a refrigeration system of the air conditioner and is used for switching the flow direction of a refrigerant in the refrigeration system.
CN202010440088.4A 2020-05-21 2020-05-21 Four-way valve and air conditioner Active CN111677901B (en)

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CN202010440088.4A CN111677901B (en) 2020-05-21 2020-05-21 Four-way valve and air conditioner

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Application Number Priority Date Filing Date Title
CN202010440088.4A CN111677901B (en) 2020-05-21 2020-05-21 Four-way valve and air conditioner

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CN111677901A CN111677901A (en) 2020-09-18
CN111677901B true CN111677901B (en) 2022-07-12

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Citations (2)

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Publication number Priority date Publication date Assignee Title
CN101724763A (en) * 2008-10-17 2010-06-09 浙江三花制冷集团有限公司 Valve seat material, valve seat, main valve and four-way reversing valve
CN109990114A (en) * 2017-12-29 2019-07-09 浙江三花智能控制股份有限公司 Electromagnetic switching valve

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Publication number Priority date Publication date Assignee Title
JPS5516534Y2 (en) * 1974-10-14 1980-04-17
CN103936242B (en) * 2014-04-03 2015-12-30 西安交通大学 A kind of mud homogeneous viscosity-falling unit
CN204975185U (en) * 2015-09-14 2016-01-20 深圳市英诺维信自动化设备有限公司 Cross valve end cover riveter
CN106321937B (en) * 2016-10-10 2018-05-18 珠海格力电器股份有限公司 Four-way valve and air-conditioning device
CN206890936U (en) * 2017-06-29 2018-01-16 浙江省平湖市北辰实业有限公司 A kind of air-conditioning four-way valve with heat insulating function

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101724763A (en) * 2008-10-17 2010-06-09 浙江三花制冷集团有限公司 Valve seat material, valve seat, main valve and four-way reversing valve
CN109990114A (en) * 2017-12-29 2019-07-09 浙江三花智能控制股份有限公司 Electromagnetic switching valve

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