CN102235522B - Heat exchange equipment and reversing valve thereof - Google Patents
Heat exchange equipment and reversing valve thereof Download PDFInfo
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- CN102235522B CN102235522B CN201010162486.0A CN201010162486A CN102235522B CN 102235522 B CN102235522 B CN 102235522B CN 201010162486 A CN201010162486 A CN 201010162486A CN 102235522 B CN102235522 B CN 102235522B
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- 238000003466 welding Methods 0.000 claims abstract description 30
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- 229910052786 argon Inorganic materials 0.000 claims abstract description 12
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- 238000005516 engineering process Methods 0.000 abstract description 8
- 230000035515 penetration Effects 0.000 abstract description 2
- 238000004378 air conditioning Methods 0.000 description 14
- 238000010438 heat treatment Methods 0.000 description 9
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- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 229910052721 tungsten Inorganic materials 0.000 description 3
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- 238000007514 turning Methods 0.000 description 1
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- Multiple-Way Valves (AREA)
- Valve Housings (AREA)
Abstract
The invention discloses a reversing valve for heat exchange equipment. The reversing valve comprises a valve body (21), a piston (22) and an end cover (23), wherein the piston (22) reciprocates along the axial direction of the valve body (21); the end cover (23) is inserted in and welded at the end part of the valve body (21) and comprises an edge part (231) and a central part (232) which is fixedly connected with the edge part (231); and the edge part (231) is welded with the valve body (21) through consumable electrode argon arc welding. The consumable electrode argon arc welding technology has lower requirement on the cleanness and the flatting condition of workpieces and has stronger welding penetration capability and higher quality of weld seams, thereby further improving the work reliability of the reversing valve and improving the welding efficiency between the end cover (23) and the valve body (21).
Description
Technical field
The present invention relates to technical field of heat exchange, particularly a kind of selector valve for heat-exchange apparatus.The invention still further relates to a kind of heat-exchange apparatus that comprises above-mentioned selector valve.
Background technique
Along with the fast development of China's economic construction, relate to the industries such as the air conditioner refrigerating in heat exchange field constantly towards diversification, multi-functional future development.
In heat-exchange apparatus, generally all can relate to the conversion of the circulation passage of medium, below taking heat pump type air conditioner system as example, briefly introduce the transfer process of the circulation passage of heat-exchange apparatus medium.
In heat pump type air conditioner system, general by changing the circulating direction of refrigerant, adjust refrigeration or the heating of air-conditioning system, and the change of the circulating direction of refrigerant needs selector valve to realize conventionally.Simply introduce below refrigeration, the heating transfer process of air-conditioning system as an example of four-way change-over valve example.
Please refer to Fig. 1, Fig. 1 is the partial structurtes schematic diagram of four-way change-over valve in a kind of typical air-conditioning system.
Four-way change-over valve is arranged in the refrigerant loop being made up of indoor heat converter and outdoor heat converter etc., generally include electromagnetic coil, main valve and pilot valve three parts, the two ends of the valve body body 12 of main valve are all welded with end cap 13, and in valve body body 12, there is slide block 11, slide block 11 is connected with right piston 152 with left piston 151 by connecting rod 14 respectively, and the cavity of main valve is divided into left chamber, middle chamber and right chamber by left piston 151 and right piston 152; The top of slide block 11 is processed with step, and match with above-mentioned connecting rod 14 by step, the bottom of slide block 11 has inner chamber 111, take over by one group the Fluid Circulation that forms a sealing by inner chamber 111, another group is taken over the Fluid Circulation that forms another sealing by the inner chamber of valve body body 12, and the path of two groups of Fluid Circulations is separated mutually by the main part of slide block 11.In the time that air-conditioning need freeze, under the effect of pilot valve, make between the left chamber of main valve and right chamber mineralization pressure poor, pressure difference between the left and right chamber of main valve promotes slide block 11 and two-piston moves, make the refrigeration agent of internal system flow to compressor air suction mouth from exhaust outlet of compressor, system is in refrigeration work state; In the time that air-conditioning needs heating operation, same under the effect of pilot valve, make between the left and right chamber of main valve mineralization pressure poor, this pressure difference promotes slide block 11 and two-piston moves in the opposite direction, makes MEDIA FLOW to compressor air suction mouth, and system is in heating working state.Realize the object of the dual-use that heats winter of freezing summer by said process.
Please refer to Fig. 2 and Fig. 3, Fig. 2 be the end cap in four-way change-over valve shown in Fig. 1 in the cross-sectional schematic of main apparent direction, Fig. 3 is that the end cap in four-way change-over valve shown in Fig. 1 is at the structural representation of left apparent direction.
In prior art; between end cap and valve body, be mainly to adopt non-consumable gas shielded arc welding mode to weld (being called for short TIG weldering); its main feature is to utilize dystectic tungsten bar as an electrode; using workpiece as another electrode, and utilize a kind of welding method of argon gas as protective medium.But the major defect of this welding manner is very high to the turbidity test requirement of workpiece, if there is the impurity such as greasy dirt, can easily cause appearance of weld bad; In addition, because tungsten electrode current capacity is limited, especially when AC welding, tungsten electrode need be lower with electric current, cause the penetration ability of TIG weldering lower, welding speed is slow, therefore welds manufacturing efficiency lower.
In addition, in the time of the working state conversion of system, first piston 151 and the second piston 152 are in the interior motion of valve body 11, can stop motion in the time that two-piston touches respectively the end cap mutually close with it, also be that end cap has positioning action in the time that system mode is changed, and four-way change-over valve is applied in air-conditioning system more, need to bear alternately property pressure loading and impulsive load.Region in Fig. 3 shown in dash area is the locating area of end cap to piston, and being under pressure, piston is easy to deform after load, thereby cause piston and valve body to seal, when serious, may cause the leakage of selector valve to lose efficacy, have a strong impact on working life and the reliability of piston and selector valve.
Therefore, how to improve the welding efficiency of end cap and the valve body of selector valve, and improve the functional reliability of selector valve, extend its working life, the problem that need solve with regard to becoming those skilled in the art.
Summary of the invention
The object of this invention is to provide a kind of selector valve for heat-exchange apparatus, it has higher functional reliability and longer working life, and the welding efficiency of its end cap and valve body is higher.Another object of the present invention is to provide a kind of heat-exchange apparatus that comprises above-mentioned selector valve.
For solving the problems of the technologies described above, the invention provides a kind of selector valve for heat-exchange apparatus, comprise valve body, piston along the axially reciprocating of described valve body, and plug-in mounting be welded in the end cap of described valve end; Described end cap comprises edge portion and the central part being fixedly connected with described edge portion, and described edge portion and described valve body weld by metal argon arc welding.
Preferably, the inner of described edge portion is positioned at the inner inner side of described central part, and the minimum diameter of described edge portion the inner is less than the external diameter of described piston, and be greater than described piston internal diameter 1/2nd.
Preferably, described edge portion is the tubular structure with proper wall thickness, and described edge portion is described piston location by the end face of its barrel; The sidewall of described edge portion offers passage, and the minimum diameter of described passage is greater than or equal to the external diameter capillaceous of described selector valve.
Preferably, described central part is the concave ball shape of inside concave end.
Preferably, described edge portion and described central part have integral structure.
Preferably, described edge portion and described central part process by plate integrated punching.
Preferably, described edge portion is all plugged in described valve body.
Preferably, described edge portion offers assembly chamfer near the periphery of described valve body.
The present invention also provides a kind of heat-exchange apparatus, comprises the selector valve described in above-mentioned any one.
Particularly, described heat-exchange apparatus is heat pump air conditioner.
Selector valve for heat-exchange apparatus provided by the present invention, comprising: valve body, piston and end cap; Wherein piston is along the axially reciprocating of valve body, and end cap plug-in mounting is also welded in the two ends of valve body; Above-mentioned end cap comprises edge portion and central part, and described edge portion and described valve body weld by metal argon arc welding.Turbidity test and the smooth situation requirement of metal argon arc welding connection technology to workpiece is lower, and the ability of melting is stronger, and weldquality is higher, thereby has further improved the functional reliability of selector valve, and has improved the welding efficiency between end cap and valve body.
One preferred embodiment in, above-mentioned edge portion has predetermined radial thickness, center portion is in the interior week of edge portion, and be fixedly connected with this edge portion, edge portion is with respect to the distance of closest approach and the piston of piston, be less than the distance of central part with respect to closest approach and the piston of piston, also be the inner inner side that the inner of edge portion is positioned at central part, the minimum diameter of edge portion the inner is less than the external diameter of piston, and be greater than piston external diameter 1/2nd so that the motion positions that end cap is piston by edge portion.In the cold and hot transfer process of heat pump type air conditioning system, piston in the inner chamber of valve body with respect to valve body side-to-side movement, in the time that piston moves to limit position left, because the edge portion of above-mentioned end cap and the distance of piston are less than the distance of central part and piston, therefore, the edge portion of piston and left side end cap bumps, and stop piston to continue motion by edge portion, also be that end cap is the piston location in motion by its edge portion, like this, by the edge portion that is positioned at end cap periphery, piston is located comparatively reliably, avoid because the easily deformable consequence in piston edge causing is located in the end cap center region of prior art, thereby significantly improve the operational safety of selector valve, extended the working life of selector valve simultaneously.
In another preferred embodiment, above-mentioned central part can be concave ball shape, and to the direction depression near piston.Due in the working procedure of system, selector valve is pressure elements, its end cap need to bear larger impact force and pressure, central part is processed into concave ball shape and can improves compressive strength and the impact resistance of end cap, thereby improved functional reliability and the Safety performance of selector valve.
Brief description of the drawings
Fig. 1 is the structural representation of the four-way change-over valve in a kind of typical heat-exchange apparatus;
Fig. 2 is that the end cap in four-way change-over valve shown in Fig. 1 is in the cross-sectional schematic of main apparent direction;
Fig. 3 is that the end cap in four-way change-over valve shown in Fig. 1 is at the structural representation of left apparent direction;
Fig. 4 is the structural representation of a kind of embodiment of selector valve for heat-exchange apparatus provided by the present invention;
Fig. 5 is the cross-sectional schematic of end cap in the selector valve shown in Fig. 4;
Fig. 6 is the cross-sectional schematic of a kind of embodiment of assembling form of selector valve provided by the present invention;
Fig. 7 is the cross-sectional schematic of the another kind of embodiment of assembling form of selector valve provided by the present invention.
Embodiment
Core of the present invention is to provide a kind of selector valve for heat pump type air conditioner system, and it has higher functional reliability and longer working life, and the welding efficiency of its end cap and valve body is higher.Another core of the present invention is to provide a kind of heat-exchange apparatus that comprises above-mentioned selector valve.
In order to make those skilled in the art person understand better technological scheme of the present invention, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 4 and Fig. 5, Fig. 4 is the structural representation of a kind of embodiment of selector valve for heat pump type air conditioner system provided by the present invention; Fig. 5 is the cross-sectional schematic of end cap in the selector valve shown in Fig. 4.
In a kind of embodiment, selector valve provided by the present invention is for heat-exchange apparatus, this heat-exchange apparatus refers to and can carry out at work thermoregulator equipment, above-mentioned selector valve is installed on the appropriate location in heat-exchange apparatus, for the conversion between equipment different fluid passage, be example for the four-way change-over valve in heating ventilation air-conditioning system below, briefly introduce structure and the working procedure of selector valve provided by the present invention.
This selector valve comprises valve body 21, piston 22 and end cap 23; Wherein piston 22 is along the axially reciprocating of valve body 21, end cap 23 plug-in mountings are also welded in the two ends of valve body 21, in the time that air-conditioning need freeze, under the effect of the pilot valve of selector valve, make between the left chamber of main valve and right chamber mineralization pressure poor, pressure difference between the left and right chamber of main valve promotes piston 22 and is moved to the left, and in the time that the piston 22 in left side collides with end cap 23, the motion of piston 22 is subject to the restriction of end cap 23 and stops, now the medium exhaust outlet of compressor of internal system flow to compressor air suction mouth, and system is in refrigeration work state; In the time that air-conditioning needs heating operation, same under the effect of pilot valve, make between the left and right chamber of main valve mineralization pressure poor, this pressure difference promotes piston 22 and moves right, and in the time that the piston 22 on right side collides with end cap 23, the motion of piston 22 is subject to the restriction of end cap 23 and stops, and now refrigeration agent is from flowing to compressor air suction mouth, and system is in heating working state; Above-mentioned end cap 23 further comprises edge portion 231 and central part 232, between described edge portion 231 and valve body 21, weld and one by the mode of metal argon arc welding, turbidity test and the smooth situation of metal argon arc welding connection technology to workpiece requires lower, and the ability of melting is stronger, weldquality is higher, thereby further improve the functional reliability of selector valve, and improved the welding efficiency between end cap and valve body.
Wherein the inner of above-mentioned edge portion 231 is positioned at the inner inner side of central part 232, and the minimum diameter of edge portion 231 the inners is less than the external diameter of piston 22, and be greater than piston 22 internal diameter 1/2nd.Be specifically as follows, edge portion 231 has the radial thickness of pre-sizing, central part 232 is positioned at the week of edge portion 231, and be fixedly connected with edge portion 231, edge portion 231 is with respect to the distance of closest approach and the piston 22 of piston 22, be less than the distance of central part 232 with respect to closest approach and the piston 22 of piston 22, also be the inner inner side that the inner of edge portion 231 is positioned at central part 232, and the minimum diameter of edge portion 231 the inners is less than the external diameter of described piston 22, so that end cap 23 is the motion positions of piston 22 by edge portion 231.
In the cold and hot transfer process of heat pump type air conditioning system, piston 22 in the inner chamber of valve body 21 with respect to valve body 21 side-to-side movements, in the time that piston 22 moves to limit position left, because the edge portion 231 of above-mentioned end cap 23 and the distance of piston 22 are less than the distance of central part 232 and piston 22, therefore, piston 22 bumps with the edge portion 231 of left side end cap 23, and stop piston 22 to continue motion by edge portion 231, also being end cap 23 locates for the piston 22 in motion by its edge portion 231, like this, by the edge portion 231 that is positioned at end cap 23 peripheries, piston 22 is located comparatively reliably, avoid piston 22 middle parts because the distortion causing is impacted in end cap 23 location, thereby significantly improve the operational safety of selector valve, extended the working life of selector valve simultaneously.
The inner that it is pointed out that the edge portion 231 described in literary composition refers to, the end face of the most close piston 22 in edge portion 231, and correspondingly, the inner of central part 231 refers to, the end face of the most close piston 22 on central part 231; Inner side refers to the side near piston 22.
Above-mentioned central part 232 can be concave ball shape, and to the direction depression near described piston 22.Due in the working procedure of system, selector valve is pressure elements, its end cap 23 need to bear larger impact force and pressure, central part 232 is processed into concave ball shape and can improves compressive strength and the impact resistance of end cap 23, thereby further improved functional reliability and the Safety performance of selector valve.
It is pointed out that for convenience, this specification is only example for the four-way change-over valve in heating ventilation air-conditioning system, and heat-exchange apparatus provided by the present invention is not limited to heating ventilation air-conditioning system, can be also the equipment such as compressor, water heater; Meanwhile, selector valve provided by the present invention is also not limited to four-way change-over valve, in the time of the equipment for different, should according to requirements select the concrete form of selector valve, and should not be subject to the restriction of embodiment in this specification.
Above-mentioned valve body 21 can be for having the tubular structure of the cavity running through vertically, and the two ends of valve body 21 encapsulate by end cap 23, being connected between the valve body 21 of selector valve and end cap 23 generally need to have comparatively stable sealing, to ensure the functional reliability of selector valve, therefore, above-mentioned end cap 23 can be specially with the Placement of valve body 21, first end cap 23 is plugged in valve body 21, by the joint bending of valve body 21, make the distance of joint and end cap 23 close, thereby realize the riveted joint of valve body 21 and end cap 23, then realize combining closely and sealing of valve body 21 and end cap 23 by the mode of welding.
Above-mentioned valve body 21 is also not limited to tubular structure, it can be also the structural type of internal diameter convergent vertically, if can realize to the reliable positioning instant of piston 22 can, obvious, the minimum diameter of above-mentioned valve body 21 should be greater than 1/2nd of piston 22 diameters, to meet the surrounding location to piston 22.
End cap 23 also can directly be press-fited after valve body 21 and be welded by its edge portion 231, to simplify assembly process.
Above-mentioned edge portion 231 offers assembly chamfer 2312 near the periphery of valve body 21, and like this, in the time that edge portion 231 presses fit into valve body 21, this assembly chamfer 2312 plays guiding function can assemble end cap 23 time, makes end cap 23 more be convenient to press-fit.
Above-mentioned edge portion 231 and central part 232 can have integral structure, thereby without utilizing connected element to connect both, have simplified machining process, and have improved connective stability.
Apparently, above-mentioned edge portion 231 and central part 232 are also not limited to has integral structure, also can both be fixedly connected with by Placement conventional in related domain, for example, can connect by the mode of welding, the mode that also can be bolted connects removably to both.
The material of above-mentioned valve body 21 and end cap 23 can be all brass.The valve body 21 and the end cap 23 that use brass to process are comparatively easy in welding process, and soldering reliability more easily ensures; Brass material can not get rusty simultaneously, and working life is longer, and cost is lower.Apparently, the material of above-mentioned valve body 21 and end cap 23 is also not limited to brass, can be also conventional other metallic material that use in related domain, such as stainless steel, aluminum alloy etc.
In the time using metal argon arc welding welding, in selector valve, the assembling form of end cap 23 and valve body 21 also can have multiple.
Please refer to Fig. 6, the cross-sectional schematic of a kind of embodiment of assembling form that Fig. 6 is selector valve provided by the present invention.
Above-mentioned edge portion 231 and central part 232 can process by plate integrated punching, this processing method is the power by means of conventional or special punching equipment, make plate in mould, directly be subject to deformation force and be out of shape, thereby acquisition definite shape, the production technology of the product parts of size and performance.Compared with other method of machining and plastic working, this kind of plate one processing mode has higher manufacturing efficiency, and easy to operate, is easy to realize mechanization and automation; Meanwhile, ensured that the size and dimension precision of the central part 232 that processes and edge portion 231 is higher, and the adaptability of product is better.
The integral processing method of above-mentioned central part 232 and edge portion 231 is also not limited to the mode of plate integral type punching press, also can be the conventional integral type processing method using in related domain, the mode that for example can process by turning on same plate obtains central part 232 and the edge portion 231 of preliminary dimension specification and shape.
In a kind of embodiment, when the mode of taking the punching press of plate integral type adds man-hour to central part 232 and edge portion 231, can be specially with the assembly technology that valve body 21 carries out by edge portion 231, the edge portion 231 of end cap 23 is all plugged in valve body 21, and be welded in valve body 21 by its edge portion 231, and edge portion 231 welds by metal argon arc welding with valve body 21, because end cap 23 provided by the present invention is the moulding of plate integrated punching, therefore, will inevitably there is moulding fillet, like this when the edge of end cap 23 portion 231 is all pressed into valve body 21 and with the exterior edge face of valve body 21 after same plane, between edge portion 231 and valve body 21, there will be weld seam 4 structures that outer imperial palace is little, metal argon arc welding connection technology uses welding wire as electrode, and as consumable electrode, the use current density of its permission is higher, therefore the fusion penetration of mother metal is large, fill metal deposition rate fast, turbidity test to workpiece and smooth situation require lower, and the ability of melting is stronger, weldquality is higher, thereby further improve the functional reliability of selector valve.
When the mode of taking the punching press of plate integral type adds man-hour to central part 232 and edge portion 231, be not limited to above-mentioned concrete mode by edge portion 231 with the assembly technology that valve body 21 carries out, also can take other modes.
Please refer to Fig. 7, the cross-sectional schematic of the another kind of embodiment of assembling form that Fig. 7 is selector valve provided by the present invention.
In another kind of embodiment, above-mentioned edge portion 231 can partly be plugged in valve body 21, is also that a part for edge portion 231 is inserted in valve body 21, instead of is all inserted in valve body 21.Like this, the moulding fillet forming in plate integrated punching technique is not on weld seam 4, and weld seam 4 is now straight intersection line, therefore, further simplified the technological process of welding, improved the efficiency of welding.
Above-mentioned edge portion 231 can be for having the tubular structure of proper wall thickness, and edge portion 231 is the motion positions of piston 22 by its barrel.Apparently, the concrete thickness of barrel should be determined according to the size of required impact force of bearing in using and pressure, not limit at this.
The sidewall of above-mentioned edge portion 231 offers through hole 2311, the diameter of through hole 2311 is greater than or equal to the diameter of the capillary tube 5 of selector valve, to avoid the rigging position of end cap 23 and the rigging position of capillary tube 5 to interfere, further improve the operational safety of selector valve.
Except above-mentioned selector valve, the present invention also provides a kind of heat-exchange apparatus that comprises above-mentioned selector valve, and other each several part structures of this heat-exchange apparatus please refer to prior art, do not repeat them here.
Particularly, above-mentioned heat-exchange apparatus can be the equipment such as air-conditioning, compressor, refrigerating machine and water heater.
Above a kind of heat-exchange apparatus provided by the present invention and selector valve thereof are described in detail.Applied specific case herein principle of the present invention and mode of execution are set forth, above embodiment's explanation is just for helping to understand method of the present invention and core concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.
Claims (7)
1. the selector valve for heat-exchange apparatus, comprise valve body (21), piston (22) along the axially reciprocating of described valve body (21), and plug-in mounting be welded in the end cap (23) of described valve body (21) end; It is characterized in that, described end cap (23) comprises edge portion (231) and the central part (232) being fixedly connected with described edge portion (231), and described edge portion (231) welds by metal argon arc welding with described valve body (21);
The motion positions that described end cap (23) is piston by described edge portion (231), the inner of described edge portion (231) is positioned at the inner inner side of described central part (232), the inner minimum diameter of described edge portion (231) is less than the external diameter of described piston (22), and be greater than described piston (22) internal diameter 1/2nd;
The inner of described edge portion (231) refers to the end face of the most close piston (22) in described edge portion (231), the inner of described central part (232) refers to the end face of the most close piston (22) on described central part (232), and inner side refers to the side near piston (22);
Described edge portion (231) is tubular structure, and described edge portion (231) is described piston (22) location by the end face of its barrel; The sidewall of described edge portion (231) offers passage (2311), and the minimum diameter of described passage (2311) is greater than or equal to the external diameter of the capillary tube (5) of described selector valve;
Described central part (232) is the concave ball shape of inside concave end.
2. the selector valve for heat-exchange apparatus according to claim 1, is characterized in that, described edge portion (231) has integral structure with described central part (232).
3. the selector valve for heat-exchange apparatus according to claim 2, is characterized in that, described edge portion (231) and described central part (232) process by plate integrated punching.
4. the selector valve for heat-exchange apparatus according to claim 3, is characterized in that, described edge portion (231) is all plugged in described valve body (21).
5. according to the selector valve for heat-exchange apparatus described in claim 1 to 4 any one, it is characterized in that, described edge portion (231) offers assembly chamfer (2312) near the periphery of described valve body (21).
6. a heat-exchange apparatus, is characterized in that, comprises the selector valve described in claim 1 to 5 any one.
7. heat-exchange apparatus according to claim 6, is characterized in that, is specially heat pump air conditioner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010162486.0A CN102235522B (en) | 2010-04-30 | 2010-04-30 | Heat exchange equipment and reversing valve thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010162486.0A CN102235522B (en) | 2010-04-30 | 2010-04-30 | Heat exchange equipment and reversing valve thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102235522A CN102235522A (en) | 2011-11-09 |
| CN102235522B true CN102235522B (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010162486.0A Active CN102235522B (en) | 2010-04-30 | 2010-04-30 | Heat exchange equipment and reversing valve thereof |
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| CN (1) | CN102235522B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104654681A (en) * | 2015-01-22 | 2015-05-27 | 天长市永鑫科技工贸有限公司 | Heat exchanging circulating system |
| CN106288543B (en) * | 2015-05-11 | 2020-09-08 | 浙江盾安禾田金属有限公司 | Five-way reversing valve and air conditioning system |
| CN106286897B (en) * | 2015-06-08 | 2020-01-10 | 浙江盾安禾田金属有限公司 | Four-way reversing valve and heat exchange equipment |
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| CN1161420A (en) * | 1997-01-20 | 1997-10-08 | 张云龙 | Direction change valve for refrigerant fluid |
| JP3295710B2 (en) * | 1993-12-01 | 2002-06-24 | 株式会社鷺宮製作所 | Valve element for four-way switching valve and method of manufacturing the same |
| CN101338825A (en) * | 2007-07-02 | 2009-01-07 | 浙江三花制冷集团有限公司 | Electromagnetic valve |
| CN101338827A (en) * | 2007-07-02 | 2009-01-07 | 浙江三花制冷集团有限公司 | Heat pump -type idle call electromagnetic direction changing valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4077705B2 (en) * | 2002-10-01 | 2008-04-23 | 株式会社鷺宮製作所 | Manufacturing method of valve body for four-way switching valve |
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| JP3295710B2 (en) * | 1993-12-01 | 2002-06-24 | 株式会社鷺宮製作所 | Valve element for four-way switching valve and method of manufacturing the same |
| CN1161420A (en) * | 1997-01-20 | 1997-10-08 | 张云龙 | Direction change valve for refrigerant fluid |
| CN101338825A (en) * | 2007-07-02 | 2009-01-07 | 浙江三花制冷集团有限公司 | Electromagnetic valve |
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|---|---|
| CN102235522A (en) | 2011-11-09 |
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