KR20080101248A - Four way valve - Google Patents

Abstract

A four way valve including o-ring on the side sheet of a main valve is provided to improve the closure force and operate a branching unit under high pressure by having the high durability of a piston bracket by broadening the holding surface of the piston bracket connected with the side sheet. A four way valve includes as follows. The main valve includes a inlet tube(111) transferring r refrigerant. A valve housing(110) includes a outflow branch connected with the inlet tube. A side sheet(120) includes a penetration hole penetrating a connecting part on one side of the side sheet and inserts o-ring(122) along an outer rim part. A piston bracket(130) includes a cap binding hole in which the moving cap is inserted in the upper side center and a connection hole corresponding to a penetration hole of the side sheet and is combined in the inner side of both side sheet. A moving cap(140) forms a stepped projection on the bottom part so that the down side of the moving cap is inserted in a cap connection hole(133) of the piston bracket. A bushing includes a bushing hall(151) penetrating with an outflow branch pipe on the upper side of the valve housing.

Description

Four Way Valve

1 is a cross-sectional view showing the structure of a main valve in a conventional four-way valve.

Figure 2 is a perspective view of the side seat of the main valve in the four-way valve of the prior art.

Figure 3 is a perspective view showing the piston bracket of the main valve in the four-way valve of the prior art.

Figure 4 is a perspective view of the entire four-way valve according to the present invention.

Figure 5 is a cross-sectional view showing the structure of the main valve in the four-way valve according to the present invention.

Figure 6 is a perspective view showing the piston bracket of the main valve in the four-way valve according to the present invention.

Figure 7 is a perspective view showing a side seat of the main valve in the four-way valve according to the present invention.

8 is a cross-sectional view showing a solenoid valve structure in a four-way valve according to the present invention.

         * Explanation of symbols for the main parts of the drawings *

               100: main valve 110: valve housing

               120: side seat 130: piston bracket

               140: moving cap 150: bushing

               200: solenoid valve 210: plunger guide

               220: plunger 230: sole body

               240: bushing 250: push rod

               260: sole seat 270: tension bracket

               271: protrusion 290: spring

               300: bypass

The present invention relates to a four-way valve, and more particularly, to a four-way valve to control the selective flow of the flow of fluid and gas flowing from one side and smooth operation even under high pressure.

In general, the four-way valve is to divert the flow of fluid and gas flowing from one side to branch to the outlet branch, widely used in refrigerant circuits such as air conditioners, refrigerators and vending machines, and is also used in various machinery.

The four-way valve is composed of a main valve for selectively converting the flow of the pipe to which the refrigerant is transferred, and a solenoid valve for controlling the operation of the main valve.

The main valve has a valve housing (10) having an inlet pipe (11) through which the refrigerant is transferred and an outlet branch pipe (12) communicating with the inlet pipe (11) as shown in FIG. Side seats 20 covering both sides of the valve housing 10, the piston bracket 30 is coupled to the inside of the side seat 20, and through the center of the piston bracket 30 through the outflow Branch means consisting of a moving cap 40 for selectively covering the engine 12; And a bushing 50 provided between the movable cap 40 and the outlet branch pipe 12 to communicate with the outlet branch pipe 12.

The solenoid valve is connected to the main valve and the bypass tube to determine whether the bypass tube is opened or closed according to the operation of the solenoid valve, and the main valve connected to the bypass tube moves the branch means according to the pressure of the refrigerant flowing into the bypass tube. Selectively convert the flow of to control the flow.

Here, the side sheet of the conventional branching means is coupled to the rivet 25 between the inner plate 21 and the outer plate 22 with an elastic body 24 and a sealing sheet 23 interposed therebetween, as shown in FIG. One side of the coupling portion is provided with a through hole 26 penetrating four parts are bolted to the side of the piston bracket (30).

In addition, the piston bracket 30, as shown in Figure 3 by pressing the iron plate is bent at both ends in one direction, the center 31 is perforated so that the moving cap 40 is fitted, both sides, before and after each other The support surface 32 is bent in the shifting direction and provided with a bolt hole 33 to fasten the side sheet to the support surface (32).

Such, the conventional side seat 20 is an increase in the manufacturing cost and the work process is complicated by assembling a number of parts, and when the tightening force is weak when assembling to one side, the piston bracket 30 is also supported Narrow surface 32 is not only a weak support force but also made of a thin plate without a stable fastening with the side sheet 20 had a weak durability.

Therefore, when the refrigerant flowing into the bypass pipe is introduced at a high pressure, the sidesheet 20 does not endure the high pressure and the eccentricity or the bending of the piston bracket 30 occurs. There was a problem that could not be selectively switched.

In addition, the solenoid valve for controlling the operation of the main valve is a cylindrical plunger guide in which the core and the shading coil is fixed to the top, as proposed in the previously filed patent application 10-2006-0067492, and along the plunger guide A plunger having a linear movement and a push rod coupled to the lower portion thereof, and a lower sole body coupled to one end of the plunger guide and having an inlet and an outlet formed therein, are located inside the sole body and communicate with a bypass pipe. The seat and tension bracket are included.

In this case, the push rod is coupled to the lower portion of the plunger is formed in the form of a plate extending downward, the sole sheet through groove is formed on the surface of the lower side, the sole sheet is inserted into the sole sheet through groove.

The sole sheet has a groove opening at one side and a stepped portion is formed at the other side, and the insertion is performed while the stepped portion is caught at the edge of the sole sheet through groove of the push rod.

At this time, the tension bracket is fixed to the lower portion of the plunger in combination with the push rod to form a protrusion projecting on the lower side to press in the direction of the bushing so that the sole seat fitted to the push rod moves along the upper surface of the bushing.

However, the projection of the conventional tension bracket has a problem that it is difficult to press the sole sheet with a constant load because there may be a tolerance in the protrusion shape depending on the injection conditions, there is a change in the load pressing the sole sheet.

Accordingly, the present invention has been made to solve the fundamental problems of the prior art,

An object of the present invention is to provide an o-ring on the side seat of the main valve to improve the sealing force, to widen the support surface of the piston bracket to be engaged with the side seat to ensure a stable fastening, the durability of the piston bracket It is to provide a four-way valve to be strong so that the operation of the branch means even under high pressure.

Another object of the present invention is further provided with a spring outside the protrusion provided on the tension bracket of the solenoid valve so that the load applied to the sole seat can be adjusted according to the pressure conditions, so that the sole seat does not escape even under high pressure, and the refrigerant flows smoothly. It is to provide a four-way valve to induce the precise control of the operation of the main valve.

The present invention for achieving the above object is determined whether the bypass tube is opened or closed according to the operation of the solenoid valve and the main valve connected to the bypass tube selectively converts the flow of the refrigerant in accordance with the pressure of the refrigerant flowing into the bypass tube flow In the four-way valve to control,

The main valve includes a valve housing having an inlet pipe through which refrigerant is transferred and an outlet branch pipe communicating with the inlet pipe; A side seat having both sides of the valve housing provided with a through hole through which an o-ring for maintaining a close contact with the inner wall is movable along an outer edge of the valve housing; The support surface has a wide contact surface on both sides so as to be coupled to the inner side surfaces of both side sheets, the support surface has a fastening hole corresponding to the through hole of the side sheet, and has a cap coupling hole in which a moving cap is fitted in the center of the upper surface. One piston bracket; A moving cap having a stepped portion at the lower end such that the lower end is caught by the cap coupling hole of the piston bracket; And a bushing having a bushing hole penetrating the outlet branch pipe in a smaller size than the outlet branch pipe and having a bottom surface coupled to the bottom surface and the upper surface of the movable cap and having an outlet branch pipe of the valve housing.

Herein, the solenoid valve has a cylindrical plunger guide having a core and a shading coil fixed thereon, a plunger inserted into the plunger guide and vertically moving along the plunger guide, coupled to the plunger guide, and an inlet and an outlet are coupled to the plunger guide. A lower sole body formed therein, a bushing positioned in the sole body and communicating with the bypass tube, a push rod having a sole sheet through-groove in a plate shape fixed to the lower portion of the plunger and extending downward, and a sole of the push rod. And a tension bracket having a sole seat inserted into a sheet through groove and a protrusion fixed to a lower portion of the plunger and coupled with a push rod to protrude to press the sole seat, and the protrusion protruding outside the tension bracket. The spring includes a spring to adjust the load applied to the sole seat according to the pressure conditions. It is characterized by.

(Example)

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention as described above in more detail as follows.

As shown in Figure 1 is a cross-sectional view showing the structure of the main valve in the conventional four-way valve, Figure 2 is a perspective view showing a side seat of the main valve in the conventional four-way valve, Figure 3 is a prior art Figure 4 is a perspective view showing the piston bracket of the main valve in the four-way valve of, Figure 4 is a perspective view showing the whole of the four-way valve according to the present invention, Figure 5 is a structure of the main valve in the four-way valve according to the present invention 6 is a perspective view showing the piston bracket of the main valve in the four-way valve according to the present invention, Figure 7 is a perspective view showing a side seat of the main valve in the four-way valve according to the present invention, 8 is a cross-sectional view showing a solenoid valve structure in the four-way valve according to the present invention, respectively.

As can be seen from the present invention according to the operation of the solenoid valve 200 is determined whether the bypass pipe 300 is opened or closed and the main valve 100 connected to the bypass pipe 300 is the bypass pipe 300 It is configured to selectively convert the flow of the refrigerant in accordance with the pressure of the incoming refrigerant.

The main valve 100 is provided with an inlet pipe 111 through which refrigerant is transferred, and a valve housing 110 having a plurality of outlet branch pipes 112 communicating with the inlet pipe 111 and the valve housing 110. Branching means to move in accordance with the pressure of the refrigerant flowing into the bypass pipe 300 from the inside to selectively convert the flow of the refrigerant, the upper surface through the outlet branch pipe 112 and smaller than the outlet branch pipe 112 The bushing hole 151 is provided to constitute a bushing 150 for sealing the outlet branch pipe 112.

Here, the branch means is a side seat 120 to maintain a close contact with the inner wall to the extent that it is movable on both sides of the valve housing, both ends are coupled to the inner side of the side seat sheet 120 to support the moving cap 140 It consists of a piston bracket 130 and a moving cap 140 supported by the piston bracket 130 to selectively cover a bushing hole communicating with the outlet branch pipe.

The side sheet 120 is provided with an insertion hole 121 along an outer edge portion, a plurality of through holes 123 are provided on the side surface, and an o-ring 122 is provided in the insertion hole 121. It is inserted and provided.

The piston bracket 130 is provided with a support surface 131 having a wide contact surface on both sides and the support surface 131 is provided with a fastening hole 132 corresponding to the through hole 123 of the side sheet 120 and the upper surface In the center is provided a cap coupling hole 133 to which the moving cap 140 is fitted.

At this time, the piston bracket 130 is manufactured by die-casting with aluminum to have a light and thick and durable.

The movable cap 140 is provided with a stepped portion 141 at the lower end such that the lower end is inserted into the cap coupling hole 133 of the piston bracket 130, and the bushing hole communicating with the outlet branch pipe 112. 151 to have a size to selectively cover.

The solenoid valve 200 is a cylindrical plunger guide 210, the core and the shading coil is fixed to the upper portion, the plunger 220 is inserted into the plunger guide 210 and performs a linear movement up and down along the plunger guide, A lower sole body 230 coupled to one end of the plunger guide 210 and having an inlet 231 and an outlet 232 formed therein, and a bushing positioned in the sole body 230 to communicate with the bypass pipe 300. 240, a push rod 250 fixed to a lower portion of the plunger 220 and having a sole sheet through groove 251 formed in a plate shape extending downward, and inserted into a sole sheet through groove 251 of the push rod. Consisting of a tension bracket 270 fixed to the bottom of the sol 260 and the plunger 220 and provided with a protrusion 271 which is coupled to the push rod 250 and protrudes to press the sole seat. Further, a spring 290 is further formed on the outside of the protruding protrusion 271 of the tension bracket. It is made.

The spring 290 adjusts the load applied to the sole seat 260 according to the pressure conditions. Therefore, even if a tolerance occurs in the shape of the projection 271 according to the injection conditions it is possible to always maintain a constant load for pressing the sole sheet.

Referring to the operation of the present invention configured as described above are as follows.

First, the refrigerant flowing into the inlet pipe 111 of the valve housing is introduced into the solenoid valve 200 through some bypass pipe 300 and when a current is applied to the coil part of the solenoid valve 200, the plunger 220 According to the movement, the push rod 250 and the tension bracket 270 coupled to the lower portion of the plunger 220 move together.

Accordingly, the sole seat 260 fixed to the push rod 250 moves in contact with the upper surface of the bushing 240 to move the bushing hole 241 of the bushing 240 using the groove 261 of the sole seat. Open or blocked.

Therefore, the bypass pipe 300 connected according to the number of bushing holes 241 of the bushing is also opened and closed according to the movement of the sole seat 260.

When the refrigerant flows into one side of the valve housing 110 through the open bypass pipe 300, the branching means moves according to the pressurization of the refrigerant to open or block the bushing hole 151 of the bushing and the outlet branch pipe 112. ) Opening and closing is determined.

At this time, the o-ring 122 provided in the side seat 120 of the branching means maintains airtightness, and the support surface 131 of the piston bracket is securely engaged with the side seat 120 to prevent eccentricity. In addition, the durability of the piston bracket 130 is strong, so that the operation is made correctly even under high pressure.

The present invention has been shown and described with reference to specific preferred embodiments, but the present invention is not limited to the above-described embodiments, and the present invention is not limited to the spirit of the present invention. Many alternative changes and modifications will be possible by those who have the same authority.

As described above, the present invention is excellent in the sealing force of the side sheet and reduced manufacturing cost and work process due to reduced parts, and the stable coupling of the side seat and the piston bracket with a wide support surface prevents the side sheet from being eccentric, In addition, the durability of the piston bracket has the effect that the operation of the branch means is accurate even under high pressure.

In addition, the spring is further provided on the outside of the protrusion provided on the tension bracket of the solenoid valve to adjust the load applied to the sole seat according to the pressure condition, so that the sole seat does not escape even under high pressure, and the refrigerant flows smoothly to guide the operation of the main valve. The precise control has the effect of improving the reliability of the entire four-way valve.

Claims (3)

In the four-way valve to determine whether the bypass tube is opened or closed according to the operation of the solenoid valve and the main valve connected to the bypass tube selectively controls the flow of the refrigerant in accordance with the pressure of the refrigerant flowing into the bypass tube, The main valve includes a valve housing having an inlet pipe through which refrigerant is transferred and an outlet branch pipe communicating with the inlet pipe; A side seat having a through hole through which an o-ring for maintaining a close contact with the inner wall is inserted along an outer edge of the valve housing and movable to both sides of the valve housing; The support surface has a wide contact surface on both sides so as to be coupled to the inner side surfaces of both side sheets, the support surface has a fastening hole corresponding to the through hole of the side sheet, and has a cap coupling hole in which a moving cap is fitted in the center of the upper surface. One piston bracket; A moving cap having a stepped portion at the lower end such that the lower end is caught by the cap coupling hole of the piston bracket; And a bushing having a bushing hole penetrating the outlet branch pipe in a smaller size than the outlet branch pipe, and having a bottom surface coupled to the bottom surface and the upper surface of the movable cap and having an outlet branch pipe of the valve housing. Four way valve. The method of claim 1, The solenoid valve has a cylindrical plunger guide having a core and a shading coil fixed thereon, a plunger inserted into the plunger guide and vertically moving along the plunger guide, coupled to one end of the plunger guide and having an inlet and an outlet. A lower sole body formed therein, a bushing positioned in the sole body and communicating with the bypass pipe, a push rod having a sole seat through-hole fixed to a lower portion of the plunger and extending downward, and a sole of the push rod. And a tension bracket having a sole seat inserted into a sheet through groove and a protrusion fixed to a lower portion of the plunger and coupled with a push rod to protrude to press the sole seat, and the protrusion protruding outside the tension bracket. It includes a spring that can adjust the load applied to the sole seat according to the pressure conditions. Featured four way valve. In the four-way valve to determine whether the bypass tube is opened or closed according to the operation of the solenoid valve and the main valve connected to the bypass tube selectively controls the flow of the refrigerant in accordance with the pressure of the refrigerant flowing into the bypass tube, The solenoid valve has a cylindrical plunger guide having a core and a shading coil fixed thereon, a plunger inserted into the plunger guide and vertically moving along the plunger guide, coupled to one end of the plunger guide and having an inlet and an outlet. A lower sole body formed therein, a bushing positioned in the sole body and communicating with the bypass pipe, a push rod having a sole seat through-hole fixed to a lower portion of the plunger and extending downward, and a sole of the push rod. And a tension bracket having a sole seat inserted into a through hole of the seat and a protrusion fixed to a lower portion of the plunger and coupled with a push rod to protrude to press the sole seat. Includes a spring for adjusting the load on the sole seat according to the pressure conditions Four-way valve characterized.

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