CN102691820A - A bidirectional electromagnetic valve - Google Patents
A bidirectional electromagnetic valve Download PDFInfo
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- CN102691820A CN102691820A CN2011100698448A CN201110069844A CN102691820A CN 102691820 A CN102691820 A CN 102691820A CN 2011100698448 A CN2011100698448 A CN 2011100698448A CN 201110069844 A CN201110069844 A CN 201110069844A CN 102691820 A CN102691820 A CN 102691820A
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- axial
- valve
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- pilot valve
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- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
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- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
- F16K31/40—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor
- F16K31/406—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor acting on a piston
- F16K31/408—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor acting on a piston the discharge being effected through the piston and being blockable by an electrically-actuated member making contact with the piston
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses a bidirectional electromagnetic valve comprising a valve seat (1) equipped with a main valve port (11) and a valve chamber, wherein a piston (2) is disposed in the valve chamber. The valve chamber is divided into a top chamber (12) and a bottom chamber (13) by the piston (2) which is provided with a pilot valve port (21) on the top end of the piston. A circulation gap (14) is disposed between the circumferential sidewall of the piston (2) and the corresponding inner wall of the valve chamber. The piston (12) is provided with a first branch unidirectionally circulated from the top chamber (12) to one end of a horizontal connecting tube (31), a second branch unidirectionally circulated from the top chamber (12) to one end of a vertical connecting tube (32), and a third branch unidirectionally circulated from one end of the vertical connecting tube (32) to the top chamber (12). The structural design of the bidirectional electromagnetic valve substantially reduces the quantity of components and parts, simplifies the assembly technique and reduces the cost of manufacture.
Description
Technical field
The present invention relates to the solenoid valve technical field, particularly a kind of bidirectional electromagnetic valve.
Background technique
General solenoid valve, because the restriction of structure, can only one-way flow, end.In air-conditioning system, particularly in the heat pump, refrigerant is opposite in refrigeration, the flow direction when heating, thereby general single-pass solenoid valve need be used with one-way valve.Yet bidirectional electromagnetic valve can be realized two-way admittance, end, thereby need not cooperate one-way valve, can in system pipeline, directly use, thereby have comparatively significantly cost advantage.
In the prior art, Japan Patent " spy opens flat 6-101780 " discloses a kind of bidirectional electromagnetic valve, specifically please refer to Fig. 1 and Fig. 2, and Fig. 1 is the structural representation of a kind of bidirectional electromagnetic valve in the existing technology; Fig. 2 is first check valve of bidirectional electromagnetic valve among Fig. 1 and the structural representation of second check valve; Fig. 3 is the partial structurtes schematic representation that piston, first check valve and second check valve of bidirectional electromagnetic valve among Fig. 1 constitutes.
The working procedure of this bidirectional electromagnetic valve of the prior art is following:
Forward closed state: as shown in figures 1 and 3; When the coil 4 ' 4 of solenoid valve is not switched on; When the logical high pressure refrigerant of horizontal adapter 3 ' 2, the high pressure refrigerant through piston 2 ' equalizing orifice 2 ' 3 get into internal pistons, the high pressure refrigerant is opened the first pilot valve mouth 2 ' 1 by 5 ' 1 sealings of first check valve; Get into the valve seat 1 of piston 2 ' top ' epicoele 1 ' 2, the whole abrim epicoele 1 ' 2 of high pressure refrigerant; At this moment, because second check valve 5 ' 2 under the effect of epicoele 1 ' 2 mesohigh refrigerant, seals the second pilot valve mouth 2 ' 2, thereby is high voltage terminal in the epicoele 1 ' 2; At this moment; Because piston 2 in the epicoele 1 ' 2 ' lifting surface area greater than valve seat 1 ' cavity of resorption 1 ' 3 in piston 2 ' lifting surface area, and because vertical joint pipe 3 ' 1 one ends are low voltage terminal, thereby under action of pressure; Piston 2 ' close valve seat 1 ' primary valve 1 ' 1, closed electromagnetic valve.
Forward opening state: as shown in figures 1 and 3; When electromagnetic valve coil 4 ' 4 energisings; Moving iron core 4 ' 2 in the sleeve pipe 4 ' 1 moves upward under the effect of solenoid valve power, and with static iron core 4 ' 3 adhesives, moving iron core 4 ' 2 moves upward after one section idle stroke; Drive supporting body 5 ' move upward, supporting body 5 ' and then drive second check valve, 5 ' 2 unlatchings, the second pilot valve mouth 2 ' 2; At this moment, the high pressure refrigerant passes through the second pilot valve mouth 2 ' 2, and then washes nonreturn valve core 2 ' 4 open; Get into vertical joint pipe 3 ' 1 one ends because piston 2 ' on the circulation area of equalizing orifice 2 ' 3 less than the circulation area of the second pilot valve mouth 2 ' 2, thereby the pressure in the epicoele 1 ' 2 descends; Form low voltage terminal, be high voltage terminal this moment in the cavity of resorption 1 ' 3, under action of pressure; Piston 2 ' move upward is opened primary valve 1 ' 1, and solenoid valve is opened.
Reverse closed state: when coil 4 ' 4 is not switched on; As shown in figures 1 and 3; When the high pressure refrigerant was led in horizontal adapter 3 ' 2, the high pressure refrigerant got into the second pilot valve mouth 2 ' 2 through the aperture on the nonreturn valve core 2 ' 4 of piston 2 ' inside, and opened the second pilot valve mouth 2 ' 2 by 5 ' 2 sealings of second check valve; Get into epicoele 1 ' 2; The whole abrim epicoele 1 ' 2 of high pressure refrigerant this moment, and because first check valve 5 ' 1 is closed the first pilot valve mouth 2 ' 1 under the effect of epicoele 1 ' 2 mesohigh refrigerant, thereby epicoele 1 ' 2 forms high voltage terminal; At this moment; Epicoele 1 ' 2 is high voltage terminal with vertical joint pipe 3 ' 1 one ends; But because piston 2 in the epicoele 1 ' 2 ' lifting surface area greater than vertical joint pipe 3 ' 1 one end primary valves, 1 ' 1 determined piston 2 ' lifting surface area, and because cavity of resorption 1 ' 3 is a low voltage terminal with horizontal adapter 3 ' 2 one ends, thereby under action of pressure; Piston 2 ' close primary valve 1 ' 1, closed electromagnetic valve.
Reverse opening state: when coil 4 ' 4 energisings, as shown in figures 1 and 3, moving iron core 4 ' 2 moves upward under the effect of solenoid valve power; With static iron core 4 ' 32 adhesives; Moving core iron 4 ' 2 moves upward after one section idle stroke, drives supporting body 5 ' move upward, supporting body 5 ' and then drive first check valve 5 ' 1 and open the first pilot valve mouth 2 ' 1; High pressure refrigerant in the epicoele 1 ' 2 flows into horizontal adapter 3 ' 2 one ends through the first pilot valve mouth 2 ' 1 and equalizing orifice 2 ' 3; At this moment, because the circulation area of the aperture on the nonreturn valve core 2 ' 4 is less than the circulation area of equalizing orifice 2 ' 3, thereby the pressure in the epicoele 1 ' 2 descends; Form low voltage terminal; This moment, vertical joint pipe 3 ' 1 one ends still were high voltage terminal, under action of pressure, and piston 2 ' move upward; Open primary valve 1 ' 1, solenoid valve is opened.
Yet above-mentioned solenoid valve of the prior art has following shortcoming:
First; In order to realize the solenoid valve bidirectional open or to close; Two pilot valve mouths of piston 2 ' be provided with: the first pilot valve mouth 2 ' 1 and the second pilot valve mouth 2 ' 2, correspondingly, at two check valves of supporting body 5 ' be provided with: first check valve 5 ' 1 and second check valve 5 ' 2; Thereby causing component more, structure is comparatively complicated;
The second, cooperate with corresponding pilot valve mouth respectively in order to guarantee two check valves, need prevent that supporting body 5 ' edge from circumferentially rotating; Given this, as shown in Figure 2, need supporting body 5 ' on be provided with two positioning rods 5 ' 3, simultaneously on piston, be provided with two positioning holes that cooperate with positioning rod 5 ' 3 accordingly, thereby prevent supporting body 5 ' rotate.Yet this kind structural design not only causes component more, and difficulty of processing is big, and assembly technology is complicated, and manufacture cost is higher;
The 3rd, can know that by above-mentioned two point defects these solenoid valve component of the prior art are more, assembly technology is complicated, and assembling difficulty is big, thereby causes the reliability of work relatively poor relatively.
Summary of the invention
The technical problem that the present invention will solve is for providing a kind of bidirectional electromagnetic valve, and the structural design of this bidirectional electromagnetic valve can significantly reduce number of components and parts on the one hand, simplifies assembly technology, reduces manufacture cost, can improve the reliability of work on the other hand.
For solving the problems of the technologies described above; The present invention provides a kind of bidirectional electromagnetic valve; Comprise the valve seat that is provided with primary valve and valve pocket; Be provided with the piston that cooperates with said primary valve in the said valve pocket, it is epicoele and cavity of resorption that said piston is separated said valve pocket, and the upper end portion of said piston is provided with the pilot valve mouth of being opened or being closed by pilot valve components; Said bidirectional electromagnetic valve also comprises the horizontal adapter that is communicated with said cavity of resorption, and the vertical joint pipe that is communicated with cavity of resorption through said primary valve; Has the circulation gap between the circumferential side wall of said piston and the inwall of corresponding said valve pocket; Said piston is provided with and all is communicated with said pilot valve mouth and can be by said epicoele to first branch road of the unidirectional conducting of said horizontal adapter one end and can be by second branch road of said epicoele to the unidirectional conducting of said vertical joint Guan Yiduan; Also being provided with on the said piston can be by three branch road of said vertical joint Guan Yiduan to the unidirectional conducting of said epicoele; Said pilot valve mouth and the determined circulation area of said second branch road are greater than the circulation area in said circulation gap, and said pilot valve mouth and the determined circulation area of said first branch road are greater than the circulation area of said the 3rd branch road.
Preferably, said piston further offers the pilot valve passage that is communicated with said pilot valve mouth vertically, said pilot valve mouth through said pilot valve passage respectively with said first branch road and the unidirectional conducting of said second branch road.
Preferably, said first branch road comprises first radial hole, and said first radial hole, one end and said pilot valve channel connection, its other end are communicated with the aperture and become the second big radial hole; Be provided with radial sealing surfaces between said second radial hole and said first radial hole, be provided with the radial seal body of this radial sealing surfaces of sealing in said second radial hole; Said second radial hole is provided with the radial stop parts away from an end of said radial sealing surfaces, and said radial stop parts are provided with the radial direction through hole that is communicated with said second radial hole and said horizontal adapter one end.
Preferably, said second radial hole is the round platform hole, and the miner diameter end in this round platform hole connects said radial sealing surfaces, and its bigger diameter end is connected with the aperture and becomes the 3rd big radial hole, and said radial stop parts are assemblied in the 3rd radial hole.
Preferably, said second branch road comprises the axial cavity with said pilot valve channel connection, is provided with the first axial seal face between this axial cavity and the said pilot valve passage, is provided with the first axial seal body of this first axial seal face of sealing in the said axial cavity; Said axial cavity is provided with the first axial retention parts away from an end of the said first axial seal face, and these first axial retention parts are provided with first axial hole that is communicated with said axial cavity and said vertical joint Guan Yiduan.
Preferably, the said first axial seal body is a nonreturn valve core, and said nonreturn valve core is provided with spool radial hole and the spool axial bore that is interconnected, and said spool radial hole is communicated with said axial cavity, and said spool axial bore is communicated with said first axial hole.
Preferably, said axial cavity is connected with the first big axial bore of aperture change away from an end of the said first axial seal face, and said piston is provided with caulking part, and the said first axial retention parts are riveted in said first axial bore through said caulking part.
Preferably, said the 3rd branch road comprises second axial bore that is communicated with said vertical joint Guan Yiduan, and the other end of this second axial bore is communicated with the 3rd big axial bore of aperture change; Be provided with the second axial seal face between second axial bore and the 3rd axial bore, and be provided with the second axial seal body of this second axial seal face of sealing in the 3rd axial bore; Said the 3rd axial bore is provided with the second axial retention parts away from an end of the said second axial seal face, and these second axial retention parts are provided with second axial hole that is communicated with the 3rd axial bore and said epicoele.
Preferably, said piston further offers inclined hole, and said second axial bore is communicated with said vertical joint Guan Yiduan through said inclined hole.
Preferably; Said pilot valve components comprises the sleeve pipe that is connected on the said valve seat, is provided with moving iron core in the said sleeve pipe, and an end of said moving iron core is connected with sealing or opens the pilot valve spheroid of said pilot valve mouth; Its other end is connected with static iron core through elastic member, and the outside of said sleeve pipe is provided with coil.
On the basis of existing technology, has the circulation gap between the inwall of the circumferential side wall of the piston of bidirectional electromagnetic valve provided by the present invention and corresponding said valve pocket; Said piston is provided with and all is communicated with said pilot valve mouth and can be by said epicoele to first branch road of the unidirectional conducting of said horizontal adapter one end and can be by second branch road of said epicoele to the unidirectional conducting of said vertical joint Guan Yiduan; Also being provided with on the said piston can be by three branch road of said vertical joint Guan Yiduan to the unidirectional conducting of said epicoele; Said pilot valve mouth and the determined circulation area of said second branch road are greater than the circulation area in said circulation gap, and said pilot valve mouth and the determined circulation area of said first branch road are greater than the circulation area of said the 3rd branch road.
When the coil of bidirectional electromagnetic valve is not switched on, when the high pressure refrigerant gets into the cavity of resorption of valve pocket by horizontal adapter, the sealing of first branch road; Refrigerant gets into the epicoele that is positioned at the piston top through said circulation gap; Under the effect of high pressure refrigerant and gravity, pilot valve components is closed the pilot valve mouth, and this moment is because epicoele and cavity of resorption are high voltage terminal; And since in the epicoele lifting surface area of piston greater than the lifting surface area of piston in the cavity of resorption; And because vertical joint Guan Yiduan is a low voltage terminal, thereby move downward at the action of pressure lower piston, close primary valve.When the coil electricity of bidirectional electromagnetic valve, under the effect in magnetic field, pilot valve components is opened the pilot valve mouth; High pressure refrigerant in the epicoele flows into the vertical joint Guan Yiduan of low pressure through the pilot valve mouth and second branch road, because pilot valve mouth and the determined circulation area of second branch road be greater than the circulation area in said circulation gap, thereby the pressure in the epicoele descends; Form low voltage terminal, and cavity of resorption is a high voltage terminal, piston moves upward under the action of pressure of cavity of resorption and epicoele; Open primary valve, solenoid valve is opened.During coil blackout; Magnetic field disappears, and closes the pilot valve mouth thereby pilot valve components resets, and the refrigerant in the epicoele no longer flows to vertical joint Guan Yiduan through the pilot valve mouth and second branch road at this moment; Thereby the pressure in the epicoele rises, until equating with the pressure of the high pressure refrigerant of horizontal adapter one end; At this moment, piston upper chamber and cavity of resorption are high voltage terminal, but the lifting surface area of piston is greater than the lifting surface area of piston in the cavity of resorption in the epicoele; And because vertical joint Guan Yiduan is a low voltage terminal, thereby under action of pressure, piston moves downward; Close primary valve, closed electromagnetic valve.
When the coil of bidirectional electromagnetic valve was not switched on, when the high pressure refrigerant was got into by vertical joint Guan Yiduan, second branch road was closed; The high pressure refrigerant gets into epicoele through the 3rd branch road; This moment, pilot valve components was closed the pilot valve mouth under the effect of high pressure refrigerant and gravity, and epicoele and vertical joint Guan Yiduan are high voltage terminal, still owing to the lifting surface area of piston in the epicoele lifting surface area greater than the determined piston of vertical joint Guan Yiduan primary valve; And because horizontal adapter one end and cavity of resorption are low voltage terminal; Thereby under action of pressure, piston is closed primary valve, closed electromagnetic valve.When said coil electricity, under the effect in magnetic field, pilot valve components is opened the pilot valve mouth; High pressure refrigerant in the epicoele flows to horizontal adapter one end of low pressure through the pilot valve mouth and first branch road, because pilot valve mouth and the determined circulation area of first branch road be greater than the circulation area of the 3rd branch road, thereby the pressure in the epicoele descends; Be called low voltage terminal, this moment, piston moved upward under action of pressure; Open primary valve, solenoid valve is opened.When coil blackout, magnetic field disappears, and closes the pilot valve mouth thereby pilot valve components resets; High pressure refrigerant in the epicoele can not flow to horizontal adapter one end of low pressure again through the pilot valve mouth and first branch road at this moment; Thereby pressure rises, and forms the high voltage terminal that equates with vertical joint Guan Yiduan, still owing to the lifting surface area of piston in the epicoele lifting surface area greater than the determined piston of vertical joint Guan Yiduan primary valve; And because horizontal adapter one end and cavity of resorption are low voltage terminal; Thereby under action of pressure, piston is closed primary valve, closed electromagnetic valve.
With respect to the structural design of two pilot valve mouths of existing technology and two check valves, bidirectional electromagnetic valve of the present invention only be provided with a pilot valve mouth and pilot valve components, thereby reduced number of components and parts, simplified assembly technology; In addition; Because the present invention does not adopt the structural design of two check valves, thereby has just save the structure of supporting body yet, and then has save the structure that prevents two positioning rods of its rotation in the supporting body setting yet; Correspondingly; Also just save the structure of two positioning holes on the piston, thereby not only reduced number of components and parts, and reduced difficulty of processing and assembling difficulty; Because the component of bidirectional electromagnetic valve of the present invention are less, the difficulty of assembly technology reduces, thereby the reliability of its work correspondingly is improved.
In sum, bidirectional electromagnetic valve provided by the present invention can significantly reduce number of components and parts on the one hand, simplifies assembly technology, reduces manufacture cost, can improve the reliability of work on the other hand.
Description of drawings
Fig. 1 is the structural representation of a kind of bidirectional electromagnetic valve in the existing technology;
Fig. 2 is first check valve of bidirectional electromagnetic valve among Fig. 1 and the structural representation of second check valve;
Fig. 3 is the partial structurtes schematic representation that piston, first check valve and second check valve of bidirectional electromagnetic valve among Fig. 1 constitutes;
Fig. 4 is the structural representation of bidirectional electromagnetic valve in an embodiment of the present invention;
Fig. 5 is the structure of piston schematic representation of bidirectional electromagnetic valve among Fig. 4.
Wherein, the corresponding relation between reference character and the component names is among Fig. 1 to Fig. 3:
1 ' valve seat; 1 ' 1 primary valve; 1 ' 2 epicoele; 1 ' 3 cavity of resorption;
2 ' piston; 2 ' 1 first pilot valve mouths; 2 ' 2 second pilot valve mouths; 2 ' 3 equalizing orifices; 2 ' 4 nonreturn valve cores;
3 ' 2 horizontal adapters; 3 ' 1 vertical joint pipes;
4 ' 1 sleeve pipes; 4 ' 2 moving iron cores; 4 ' 3 static iron cores; 4 ' 4 coils;
5 ' supporting body; 5 ' 1 first check valves; 5 ' 2 second check valves; 5 ' 3 positioning rods.
Corresponding relation among Fig. 4 and Fig. 5 between reference character and the component names is:
1 valve seat; 11 primary valves; 12 epicoeles; 13 cavity of resorptions; 14 circulation gaps;
2 pistons; 21 pilot valve mouths; 22 pilot valve passages; 26 caulking parts;
231 first radial holes; 232 second radial holes; 233 radial sealing surfaces; 234 radial seal bodies; 235 radial stop parts; The 235a radial direction through hole; 236 the 3rd radial holes;
241 axial cavitys; 242 first axial seal faces; 243 first axial retention parts; 243a first axial hole; 244 nonreturn valve cores; 244a spool radial hole; 244b spool axial bore; 245 first axial bores;
251 inclined holes; 252 second axial bores; 253 the 3rd axial bores; 254 second axial seal faces; 255 second axial seal bodies; 256 second axial retention parts; 256a second axial hole;
31 horizontal adapters; 32 vertical joint pipes;
41 sleeve pipes; 42 moving iron cores; 43 pilot valve spheroids; 44 elastic members; 45 static iron cores; 46 coils.
Embodiment
Core of the present invention is for providing a kind of bidirectional electromagnetic valve, and the structural design of this bidirectional electromagnetic valve can significantly reduce number of components and parts on the one hand, simplifies assembly technology, reduces manufacture cost, can improve the reliability of work on the other hand.
In order to make those skilled in the art understand technological scheme of the present invention better, the present invention is done further detailed description below in conjunction with accompanying drawing and specific embodiment.
Please refer to Fig. 4 and Fig. 5, Fig. 4 is the structural representation of bidirectional electromagnetic valve in an embodiment of the present invention; Fig. 5 is the structure of piston schematic representation of bidirectional electromagnetic valve among Fig. 4.
In one embodiment, as shown in Figure 4, bidirectional electromagnetic valve provided by the present invention comprises valve seat 1, and this valve seat 1 is provided with valve pocket, is formed with primary valve 11 in the valve pocket, and is provided with the piston 2 of closing or open primary valve 11 in the valve pocket; As shown in Figure 4, it is the epicoele 12 and the cavity of resorption 13 that is positioned at piston 2 belows that is positioned at piston 2 tops that piston 2 is separated valve pocket, and in epicoele 12, the upper end portion of piston 2 is provided with pilot valve mouth 21, and this pilot valve mouth 21 is opened or closed by the pilot valve components of bidirectional electromagnetic valve; As shown in Figure 4, said bidirectional electromagnetic valve also comprises horizontal adapter 31 and vertical joint pipe 32, and horizontal adapter 31 is communicated with cavity of resorption 13, and vertical joint pipe 32 is communicated with primary valve 11, and when primary valve 11 is opened, is communicated with cavity of resorption 13.
Like Fig. 4 and shown in Figure 5, on the basis of above-mentioned existing technology, has circulation gap 14 between the circumferential side wall of piston 2 and the inwall of corresponding said valve pocket; Piston 2 is provided with first branch road and second branch road that all is communicated with pilot valve mouth 21; And when pilot valve mouth 21 is opened; First route epicoele 12 taken over the unidirectional conducting of 31 1 ends sidelong, and (that is refrigerant can flow to horizontal adapter 31 1 ends through this first route epicoele 12; And can not flow to epicoele 12 by horizontal adapter 31 1 ends); Second route epicoele 12 is to the conducting of vertical joint pipe 32 1 ends guiding (that is refrigerant can flow to vertical joint pipe 32 1 ends through this second route epicoele 12, and can not flow to epicoele 12 by vertical joint pipe 32 1 ends); Like Fig. 4 and shown in Figure 5, also being provided with on the piston 2 can be by vertical joint pipe 32 1 ends to the 3rd branch road of epicoele 12 unidirectional conductings (that is refrigerant can flow to epicoele 12 through the 3rd route vertical joint pipe 32 1 ends, and can not flow to vertical joint pipe 32 1 ends by epicoele 12); Simultaneously, pilot valve mouth 21 and the circulation area of the determined circulation area of said second branch road, pilot valve mouth 21 and the circulation area of the determined circulation area of said first branch road greater than said the 3rd branch road greater than circulation gap 14.
When the coil 46 of bidirectional electromagnetic valve is not switched on, when the high pressure refrigerant gets into the cavity of resorption 13 of valve pocket by horizontal adapter 31, the sealing of first branch road; Refrigerant gets into the epicoele 12 that is positioned at piston 2 tops through said circulation gap 14; Under the effect of high pressure refrigerant and gravity, pilot valve components is closed pilot valve mouth 21, and this moment is because epicoele 12 is high voltage terminal with cavity of resorption 13; And since in the epicoele 12 lifting surface area of piston 2 greater than the lifting surface area of piston 2 in the cavity of resorption 13; And because vertical joint pipe 32 1 ends are low voltage terminal, thereby move downward at action of pressure lower piston 2, close primary valve 11.When the coil 46 of bidirectional electromagnetic valve was switched on, under the effect in magnetic field, pilot valve components was opened pilot valve mouth 21; High pressure refrigerant in the epicoele 12 flows into vertical joint pipe 32 1 ends of low pressure through pilot valve mouth 21 and said second branch road; Because pilot valve mouth 21 and the determined circulation area of second branch road are greater than the circulation area in circulation gap 14, thereby the pressure in the epicoele 12 descends the formation low voltage terminal; And cavity of resorption 13 is a high voltage terminal; Piston moves upward under the action of pressure of cavity of resorption 13 and epicoele 12, opens primary valve 11, and solenoid valve is opened.During coil blackout; Magnetic field disappears, and closes pilot valve mouth 21 thereby pilot valve components resets, and the refrigerant in the epicoele 12 no longer flows to vertical joint pipe 32 1 ends through the pilot valve mouth 21 and second branch road at this moment; Thereby the pressure in the epicoele 12 rises, until equating with the pressure of the high pressure refrigerant of horizontal adapter 31 1 ends; At this moment, piston upper chamber 12 is high voltage terminal with cavity of resorption 13, but the lifting surface area of piston 2 is greater than the lifting surface area of piston 2 in the cavity of resorption 13 in the epicoele 12; And because vertical joint pipe 32 1 ends are low voltage terminal, thereby under action of pressure, piston 2 moves downward; Close primary valve 11, closed electromagnetic valve.
When the coil 46 of bidirectional electromagnetic valve was not switched on, when the high pressure refrigerant was got into by vertical joint pipe 32 1 ends, second branch road was closed; The high pressure refrigerant gets into epicoele 12 through the 3rd branch road; This moment, pilot valve components was closed pilot valve mouth 21 under the effect of high pressure refrigerant and gravity, and epicoele 12 is high voltage terminal with vertical joint pipe 32 1 ends, but owing to the lifting surface area of piston 2 in the epicoele 12 lifting surface area greater than vertical joint pipe 32 1 end primary valves 11 determined pistons 2; And because horizontal adapter 31 1 ends and cavity of resorption 13 are low voltage terminal; Thereby under action of pressure, piston 2 is closed primary valve 11, closed electromagnetic valve.When coil 46 energisings, under the effect in magnetic field, pilot valve components is opened pilot valve mouth 21; High pressure refrigerant in the epicoele 12 flows to horizontal adapter 31 1 ends of low pressure through the pilot valve mouth 21 and first branch road, because pilot valve mouth 21 and the circulation area of the determined circulation area of first branch road greater than the 3rd branch road, thereby the decline of the pressure in the epicoele 12; Form low voltage terminal, this moment, piston 2 moved upward under action of pressure; Open primary valve 11, solenoid valve is opened.When coil 46 outages, magnetic field disappears, and closes pilot valve mouth 21 thereby pilot valve components resets; High pressure refrigerant in the epicoele 12 can not flow to horizontal adapter 31 1 ends of low pressure again through the pilot valve mouth 21 and first branch road at this moment; Thereby pressure rises, and forms the high voltage terminal that equates with vertical joint pipe 32 1 ends, still owing to the lifting surface area of piston in the epicoele 12 lifting surface area greater than vertical joint pipe 32 1 end primary valves 11 determined pistons 2; And because horizontal adapter 31 1 ends and cavity of resorption 13 are low voltage terminal; Thereby under action of pressure, piston 2 is closed primary valve 11, closed electromagnetic valve.
With respect to the structural design of two pilot valve mouths of existing technology and two check valves, bidirectional electromagnetic valve of the present invention only be provided with a pilot valve mouth 21 and pilot valve components, thereby reduced number of components and parts, simplified assembly technology; In addition; Because the present invention does not adopt the structural design of two check valves, thereby has just save the structure of supporting body yet, and then has save the structure that prevents two positioning rods of its rotation in the supporting body setting yet; Correspondingly; Also just save the structure of two positioning holes on the piston, thereby not only reduced number of components and parts, and reduced difficulty of processing and assembling difficulty; Because the component of bidirectional electromagnetic valve of the present invention are less, the difficulty of assembly technology reduces, thereby the reliability of its work correspondingly is improved.
In sum, bidirectional electromagnetic valve provided by the present invention can significantly reduce number of components and parts on the one hand, simplifies assembly technology, reduces manufacture cost, can improve the reliability of work on the other hand.
In the above-described embodiments, can make concrete design to pilot valve components.As shown in Figure 4, pilot valve components comprises sleeve pipe 41, moving iron core 42, pilot valve spheroid 43, elastic member 44, static iron core 45 and coil 46; Sleeve pipe 41 is connected on the valve seat 1, and an end of moving iron core 42 is provided with the pilot valve spheroid 43 of opening or closing the pilot valve mouth, and its other end is connected with static iron core 45 through elastic member 44, and coil 46 is located at the outside of sleeve pipe 41.When coil 46 energisings, under the effect in magnetic field, moving iron core 42 overcomes the elastic force of elastic member 44, to static iron core 45 1 end motions, opens pilot valve mouth 21 thereby drive pilot valve spheroid 43; When coil blackout, magnetic field disappears, and this moment, moving iron core 42 resetted under the effect of the elastic force of elastic member 44, and then drive pilot valve spheroid 43 is closed pilot valve mouth 21.
In the above-described embodiments; Be communicated with said first branch road and said second branch road for the ease of pilot valve mouth 21; Can further be provided with the pilot valve passage 22 that is communicated with pilot valve mouth 21 vertically on the piston 2, pilot valve mouth 21 is communicated with said first branch road and said second branch road respectively through this pilot valve passage 22.
Need to prove that in the above-described embodiments, no matter first branch road of which kind of structure is merely able to when pilot valve mouth 21 is opened, take over the unidirectional conducting of 31 1 ends sidelong by epicoele 12, just all should be within protection scope of the present invention; Simultaneously, second branch road of which kind of structure no matter is merely able to when pilot valve mouth 21 is opened by epicoele 12 to the unidirectional conducting of vertical joint pipe 32 1 ends, also all should be within protection scope of the present invention.
Particularly, can specifically design a kind of structure of first branch road.As shown in Figure 5, said first branch road comprises that first radial hole 231 and second radial hole, 232, the first radial holes, 231 1 ends are communicated with pilot valve passage 22, and its other end is communicated with second radial hole 232; Be provided with the radial seal body 234 that is provided with this radial sealing surfaces 233 of sealing in radial sealing surfaces 233, the second radial holes 232 between second radial hole 232 and first radial hole 231, this radial seal body 234 specifically can be spheroid; Second radial hole 232 is provided with radial stop parts 235 away from an end of radial sealing surfaces 233, and radial stop parts 235 are provided with the radial direction through hole 235a that is communicated with second radial hole 232 and horizontal adapter 31 1 ends.During work, the high pressure refrigerant gets into first radial hole 231 by pilot valve passage 22, washes radial seal body 234 then open, gets in second radial hole 232, and then gets into horizontal adapter 31 1 ends through the radial direction through hole 235a of radial stop parts 235.
Particularly, for reliability that improves 234 sealings of radial seal body and the stability of radially moving, second radial hole 232 can be the round platform hole, and the aperture of the miner diameter end in this round platform hole is slightly larger than the external diameter of radial seal body 234, and connects radial sealing surfaces 233; In addition, as shown in Figure 5, the bigger diameter end in said round platform hole is connected with the aperture and becomes the 3rd big radial hole 236, and radial stop parts 235 are assemblied in the 3rd radial hole 236, particularly, radial stop parts 235 can interference fit in the 3rd radial hole 236.
In addition, in the above-described embodiments, can also make concrete design to second branch road.Such as; As shown in Figure 5; Said second branch road comprises the axial cavity 241 that is communicated with pilot valve passage 22, is provided with the first axial seal face 242 between this axial cavity 241 and the pilot valve passage 22, axially is provided with the first axial seal body of this first axial seal face 242 of sealing in the cavity 241; Axially cavity 241 is provided with the first axial retention parts 243 away from an end of the first axial seal face 242, and these first axial retention parts 243 are provided with connection shaft to the first axial hole 243a of cavity 241 with vertical joint pipe 32 1 ends.
Particularly; As shown in Figure 5, this first axial seal body can be nonreturn valve core 244, and nonreturn valve core 244 is provided with spool radial hole 244a and the spool axial bore 244b that is interconnected; Spool radial hole 244a is communicated with axial cavity 241, and spool axial bore 244b is communicated with the first axial hole 243a.During work; The high pressure refrigerant is got in the pilot valve passage 22 by pilot valve mouth 21; Wash the sealing of 244 pairs first axial seal faces 242 of nonreturn valve core then open; Get in the axial cavity 241, the high pressure refrigerant is through spool radial hole 244a and spool axial bore 244b then, and the first axial hole 243a through the first axial retention parts 243 gets into vertical joint pipe 32 1 ends again.
Particularly; As shown in Figure 5; In order to improve the reliability that the first axial retention parts 243 connect; Axially cavity 241 can be connected with the first big axial bore 245 of aperture change away from an end of the first axial seal face 242, and piston 2 is provided with caulking part 26, the first axial retention parts 243 and is riveted in first axial bore 245 through caulking part 26.
Moreover, need to prove that in the above-described embodiments, the 3rd branch road of which kind of structure no matter can only be by vertical joint pipe 32 1 ends to epicoele 12 unidirectional conductings, just all should be within protection scope of the present invention.
Particularly, can specifically design a kind of the 3rd line structure.Such as; As shown in Figure 5, said the 3rd branch road comprises that an end of second axial bore 252 and the 3rd axial bore 253, the second axial bores 252 is communicated with vertical joint pipe 32 1 ends; Its other end is communicated with the 3rd axial bore 253, and the aperture of the 3rd axial bore 253 is greater than the aperture of second axial bore 252; In addition; As shown in Figure 5; Be provided with the second axial seal face 254 between second axial bore 252 and the 3rd axial bore 253, and be provided with the second axial seal body 255 of this second axial seal face 254 of sealing in the 3rd axial bore 253, this second axial seal body 255 can sealed spheroid; Moreover as shown in Figure 5, the 3rd axial bore 253 is provided with the second axial retention parts 256 away from an end of the second axial seal face 254, and these second axial retention parts 256 are provided with the second axial hole 256a that is communicated with the 3rd axial bore 253 and epicoele 12.
Particularly, like Fig. 4 and shown in Figure 5, be communicated with vertical joint pipe 32 1 ends for the ease of second axial bore 252, piston 2 can further be provided with inclined hole 251, the second axial bores 252 through being communicated with vertical joint pipe 32 1 ends by inclined hole 251.
During work; Like Fig. 4 and shown in Figure 5; The high pressure refrigerant is got in the inclined hole 251 by vertical joint pipe 32 1 ends; And wash the sealing of 255 pairs second axial seal faces 254 of the second axial seal body open, get in second axial bore 252, and then get in the epicoele 12 through the second axial hole 256a of the second axial retention parts 256.
At last; Need to prove; In first branch road, in fact first radial hole 231, radial sealing surfaces 233, radial seal body 234, second radial hole 232 and radial stop parts 235 have constituted first kind of one-way valve structures, and this first kind of one-way valve structures makes the unidirectional conducting of the branch road of winning; In second branch road, axially in fact cavity 241, the first axial seal face 242, nonreturn valve core 244 and the first axial retention parts 243 have constituted one-way valve structures in second, and this second kind of one-way valve structures makes the unidirectional conducting of second branch road; In the 3rd branch road; In fact second axial bore 252, the second axial seal face 254, the second axial seal body 255, the 3rd axial bore 253 and the second axial retention parts 256 have constituted the third one-way valve structures, and this third one-way valve structures makes the unidirectional conducting of the 3rd branch road.
Obviously; Under the prerequisite of the function that satisfies unidirectional conducting; Above-mentioned first kind of one-way valve structures, second kind of one-way valve structures and the third one-way valve structures can be exchanged; That is first branch road can adopt said second kind of one-way valve structures or said the third one-way valve structures, second branch road can adopt said first kind of one-way valve structures or said the third one-way valve structures, the 3rd branch road can adopt said first kind of one-way valve structures or said second kind of one-way valve structures; Certainly, under the prerequisite of the function that satisfies unidirectional conducting, said first branch road, second branch road or the 3rd branch road can also adopt the one-way valve of other structures, and the one-way valve of these other structures obviously also should be within protection scope of the present invention.
More than a kind of bidirectional electromagnetic valve provided by the present invention has been carried out detailed introduction.Used concrete example among this paper principle of the present invention and mode of execution are set forth, above embodiment's explanation just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle 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 claim of the present invention.
Claims (10)
1. bidirectional electromagnetic valve; Comprise the valve seat (1) that is provided with primary valve (11) and valve pocket; Be provided with the piston (2) that cooperates with said primary valve (11) in the said valve pocket; It is epicoele (12) and cavity of resorption (13) that said piston (2) is separated said valve pocket, and the upper end portion of said piston (2) is provided with the pilot valve mouth (21) of being opened or being closed by pilot valve components; Said bidirectional electromagnetic valve also comprises the horizontal adapter (31) that is communicated with said cavity of resorption (13), and the vertical joint pipe (32) that can be communicated with cavity of resorption (13) through said primary valve (11); It is characterized in that having circulation gap (14) between the circumferential side wall of said piston (2) and the inwall of corresponding said valve pocket; Said piston (2) is provided with and all is communicated with said pilot valve mouth (21) and can be by said epicoele (12) to first branch road of said horizontal adapter (31) the one unidirectional conductings of end and can be by second branch road of said epicoele (12) to said vertical joint pipe (32) the one unidirectional conductings of end; Also being provided with on the said piston (2) can be by three branch road of said vertical joint pipe (32) one ends to the unidirectional conducting of said epicoele (12); Said pilot valve mouth (21) and the determined circulation area of said second branch road are greater than the circulation area in said circulation gap (14), and said pilot valve mouth (21) and the determined circulation area of said first branch road are greater than the circulation area of said the 3rd branch road.
2. bidirectional electromagnetic valve as claimed in claim 1; It is characterized in that; Said piston (2) further offers the pilot valve passage (22) that is communicated with said pilot valve mouth (21) vertically, said pilot valve mouth (21) through said pilot valve passage (22) respectively with said first branch road and the unidirectional conducting of said second branch road.
3. bidirectional electromagnetic valve as claimed in claim 2; It is characterized in that; Said first branch road comprises first radial hole (231), and said first radial hole (231) one ends are communicated with said pilot valve passage (22), and its other end is communicated with the aperture and becomes big second radial hole (232); Be provided with radial sealing surfaces (233) between said second radial hole (232) and said first radial hole (231), be provided with the radial seal body (234) of this radial sealing surfaces of sealing (233) in said second radial hole (232); Said second radial hole (232) is provided with radial stop parts (235) away from an end of said radial sealing surfaces (233), and said radial stop parts (235) are provided with the radial direction through hole (235a) that is communicated with said second radial hole (232) and said horizontal adapter (31) one ends.
4. bidirectional electromagnetic valve as claimed in claim 3; It is characterized in that; Said second radial hole (232) is the round platform hole; The miner diameter end in this round platform hole connects said radial sealing surfaces (233), and its bigger diameter end is connected with the aperture and becomes big the 3rd radial hole (236), and said radial stop parts (235) are assemblied in the 3rd radial hole (236).
5. like each described bidirectional electromagnetic valve of claim 2 to 4; It is characterized in that; Said second branch road comprises the axial cavity (241) that is communicated with said pilot valve passage (22); Be provided with the first axial seal face (242) between this axial cavity (24) and the said pilot valve passage (22), be provided with the first axial seal body of this first axial seal face (242) of sealing in the said axial cavity (241); Said axial cavity (241) is provided with the first axial retention parts (243) away from an end of the said first axial seal face (242), and these first axial retention parts (243) are provided with first axial hole (243a) that is communicated with said axial cavity (241) and said vertical joint pipe (32) one ends.
6. bidirectional electromagnetic valve as claimed in claim 5; It is characterized in that; The said first axial seal body is nonreturn valve core (244); Said nonreturn valve core (244) is provided with spool radial hole (244a) and the spool axial bore (244b) that is interconnected, and said spool radial hole (244a) is communicated with said axial cavity (241), and said spool axial bore (244b) is communicated with said first axial hole (243a).
7. bidirectional electromagnetic valve as claimed in claim 5; It is characterized in that; Said axial cavity (241) is connected with big first axial bore (245) of aperture change away from an end of the said first axial seal face (242); Said piston (2) is provided with caulking part (26), and the said first axial retention parts (243) are riveted in said first axial bore (245) through said caulking part (26).
8. like each described bidirectional electromagnetic valve of claim 1 to 4; It is characterized in that; Said the 3rd branch road comprises second axial bore (252) that is communicated with said vertical joint pipe (32) one ends, and the other end of this second axial bore (252) is communicated with big the 3rd axial bore (253) of aperture change; Be provided with the second axial seal face (254) between second axial bore (252) and the 3rd axial bore (253), and be provided with the second axial seal body (255) of this second axial seal face (254) of sealing in the 3rd axial bore (253); Said the 3rd axial bore (253) is provided with the second axial retention parts (256) away from an end of the said second axial seal face (254), and these second axial retention parts (256) are provided with second axial hole (256a) that is communicated with the 3rd axial bore (253) and said epicoele (12).
9. bidirectional electromagnetic valve as claimed in claim 8 is characterized in that, said piston (2) further offers inclined hole (251), and said second axial bore (252) is communicated with said vertical joint pipe (32) one ends through said inclined hole (251).
10. like each described bidirectional electromagnetic valve of claim 1 to 4; It is characterized in that; Said pilot valve components comprises the sleeve pipe (41) that is connected on the said valve seat (1), is provided with moving iron core (42) in the said sleeve pipe (41), and an end of said moving iron core (42) is connected with sealing or opens the pilot valve spheroid (43) of said pilot valve mouth (21); Its other end is connected with static iron core (45) through elastic member (44), and the outside of said sleeve pipe (41) is provided with coil (46).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110069844.8A CN102691820B (en) | 2011-03-22 | 2011-03-22 | A kind of bidirectional electromagnetic valve |
| PCT/CN2012/072713 WO2012126368A1 (en) | 2011-03-22 | 2012-03-21 | Two-way electromagnetic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110069844.8A CN102691820B (en) | 2011-03-22 | 2011-03-22 | A kind of bidirectional electromagnetic valve |
Publications (2)
| Publication Number | Publication Date |
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| CN102691820A true CN102691820A (en) | 2012-09-26 |
| CN102691820B CN102691820B (en) | 2016-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110069844.8A Active CN102691820B (en) | 2011-03-22 | 2011-03-22 | A kind of bidirectional electromagnetic valve |
Country Status (2)
| Country | Link |
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| CN (1) | CN102691820B (en) |
| WO (1) | WO2012126368A1 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013139187A1 (en) * | 2012-03-21 | 2013-09-26 | 浙江三花股份有限公司 | Bidirectional solenoid valve |
| CN104074998A (en) * | 2013-03-28 | 2014-10-01 | 浙江三花股份有限公司 | Linear bidirectional electromagnetic valve |
| WO2014154070A1 (en) * | 2013-03-28 | 2014-10-02 | 浙江三花股份有限公司 | Linear bidirectional electromagnetic valve |
| CN106523767A (en) * | 2015-09-10 | 2017-03-22 | 浙江盾安禾田金属有限公司 | Bi-directional solenoid valve |
| CN107965584A (en) * | 2016-10-20 | 2018-04-27 | 浙江三花智能控制股份有限公司 | Electric expansion valve and there is its refrigeration system |
| CN109998166A (en) * | 2019-05-09 | 2019-07-12 | 东莞朗勤电子科技有限公司 | A kind of Water pipe and its air pressure control method |
| CN110618022A (en) * | 2019-09-17 | 2019-12-27 | 东北大学 | One-way quick electromagnetic unloading device suitable for true triaxial testing machine |
| CN111878588A (en) * | 2020-07-20 | 2020-11-03 | 江苏中伟节能科技有限公司 | Stop valve suitable for high-temperature fluid |
| WO2023103648A1 (en) * | 2021-12-07 | 2023-06-15 | 浙江盾安人工环境股份有限公司 | Solenoid valve and air conditioning system having same |
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| CN2675970Y (en) * | 2003-05-12 | 2005-02-02 | 浙江三花股份有限公司 | Fore running type bidirectional current electromagnetic valve |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013139187A1 (en) * | 2012-03-21 | 2013-09-26 | 浙江三花股份有限公司 | Bidirectional solenoid valve |
| CN104074998A (en) * | 2013-03-28 | 2014-10-01 | 浙江三花股份有限公司 | Linear bidirectional electromagnetic valve |
| WO2014154070A1 (en) * | 2013-03-28 | 2014-10-02 | 浙江三花股份有限公司 | Linear bidirectional electromagnetic valve |
| CN106523767A (en) * | 2015-09-10 | 2017-03-22 | 浙江盾安禾田金属有限公司 | Bi-directional solenoid valve |
| CN106523767B (en) * | 2015-09-10 | 2019-12-31 | 浙江盾安禾田金属有限公司 | Two-way electromagnetic valve |
| CN107965584A (en) * | 2016-10-20 | 2018-04-27 | 浙江三花智能控制股份有限公司 | Electric expansion valve and there is its refrigeration system |
| CN107965584B (en) * | 2016-10-20 | 2020-06-19 | 浙江三花智能控制股份有限公司 | Electronic expansion valve and refrigeration system with same |
| CN109998166A (en) * | 2019-05-09 | 2019-07-12 | 东莞朗勤电子科技有限公司 | A kind of Water pipe and its air pressure control method |
| CN110618022A (en) * | 2019-09-17 | 2019-12-27 | 东北大学 | One-way quick electromagnetic unloading device suitable for true triaxial testing machine |
| CN110618022B (en) * | 2019-09-17 | 2021-05-18 | 东北大学 | One-way quick electromagnetic unloading device suitable for true triaxial testing machine |
| CN111878588A (en) * | 2020-07-20 | 2020-11-03 | 江苏中伟节能科技有限公司 | Stop valve suitable for high-temperature fluid |
| WO2023103648A1 (en) * | 2021-12-07 | 2023-06-15 | 浙江盾安人工环境股份有限公司 | Solenoid valve and air conditioning system having same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102691820B (en) | 2016-07-27 |
| WO2012126368A1 (en) | 2012-09-27 |
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Effective date of registration: 20170210 Address after: 312500 Zhejiang city of Shaoxing province Xinchang County Chengguan town of Liquan Patentee after: ZHEJIANG SANHUA CLIMATE AND APPLIANCE CONTROLS GROUP Co.,Ltd. Address before: 312500 Liquan village of Chengguan Zhejiang city of Shaoxing province Xinchang County town Patentee before: ZHEJIANG SANHUA Co.,Ltd. |
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Effective date of registration: 20220816 Address after: 312500 Daming new area, Zhejiang Xinchang Economic Development Zone, Xinchang County, Shaoxing City, Zhejiang Province Patentee after: Zhejiang Sanhua Commercial Refrigeration Co.,Ltd. Address before: Xia Li Quan, Chengguan Town, Xinchang County, Shaoxing City, Zhejiang Province Patentee before: ZHEJIANG SANHUA CLIMATE AND APPLIANCE CONTROLS GROUP Co.,Ltd. |