KR20200039152A - Three way solenoid valve - Google Patents

Abstract

The present invention relates to a three-way electronic valve and, more specifically, to a three-way electronic valve capable of being suitable for switching a flow path of a refrigerant in a heat pump apparatus of a cooling and heating system. The three-way electronic valve (1000) comprises: a body (1100) including a first valve sheet (1160) installed between an inlet (1110) and a first outlet (1120), and a second valve sheet (1170) installed between the inlet and a second outlet (1130); a first valve body (1500) attached to or detached from the first valve sheet; a second valve body (1600) attached to or detached from the second valve sheet; and an electronic actuator (1300) operating the first valve body. The body (1100) comprises a spool valve body (1700) including: a third pressing member (1720) installed to be elastically pressed towards a pressing part of the first valve body; and a spool valve (1710) installed to be pressed towards the first valve body by the third pressing member and moved by being pressed towards the pressing member by the first valve body. The spool valve (1720) opens or closes a connection passage (1190) installed between the second outlet (1130) and a second back pressure chamber (P2) formed in the bottom of the second valve body (1600) while moving to the top and bottom of the body. The spool valve is opened and closed by the first valve body and also, the second valve body opens or closes the second valve sheet as the vertical pressure of the second valve body is changed in accordance with a change in the back pressure of the second valve body.

Description

3-way solenoid valve {THREE WAY SOLENOID VALVE}

The present invention relates to a three-way solenoid valve, and more particularly, to a three-way solenoid valve suitable for switching the flow path of the refrigerant in a heat pump device such as an air conditioning system.

Since a three-way solenoid valve is known in Japanese Patent Application Laid-Open No. 2012-002282, when the solenoid coil of the electromagnetic coil assembly is not energized, the second valve body moves upward by the coil spring, and the second valve seat In addition to being in close contact with, the first valve body moves upward through the second valve body and the operating rod to fall from the first valve seat, and when fluid flows from the inlet, a differential pressure is generated above and below the first valve body to generate the first valve body. The sieve moves upward, whereby the fluid moves from the inlet through the valve chamber to the first outlet, and when the electromagnetic coil is energized while flowing the fluid from the inlet, the plunger is sucked by the aspirator and descends. With this, the valve holder also descends, and immediately after the valve holder is lowered, the lower end of the valve holder contacts the upper end of the through hole of the first valve body to close the upper opening. , Whereby the differential pressure is eliminated above and below the first valve body, and the first valve body is seated on the valve seat by the pressurization of the valve holder, while plural operations are performed with movement of the plunger, valve holder and the first valve body. The rod also descends, and accordingly the second valve body also descends and falls from the second valve seat, whereby fluid flows from the inlet through the valve chamber to the second outlet.

However, Japanese Patent Publication No. 2012-002282 moves the working rod with movement of a plunger or the like, and since the second valve seated on the second valve seat is directly pressed and moved to the working rod, the differential pressure is large. Under the circumstances, there is a possibility that the second valve seat cannot be moved away from the second valve seat, so that there is a possibility that the refrigerant flow path cannot be switched. Therefore, there is a problem that the opening diameter of the second valve seat cannot be increased.

In order to solve this problem, the name "3-way solenoid valve" of the invention of Korean Patent Publication No. 10-2016-0001608 is known, and the inlet, the first and second outlets, between the inlet and the first outlet A valve body provided with a first valve seat positioned at the first valve seat and a second valve seat positioned between the inlet port and the second outlet port, and the first valve seat freely disposed in the valve body so as to contact the first valve seat. A three-way solenoid valve having a valve body, an electronic actuator for driving the first valve body, and a second valve body freely disposed in the valve body so as to contact the second valve seat, the valve body In, the second valve body is provided with a conduction hole connected to a back pressure chamber partitioned on the opposite side to the second valve seat side, and is located between the conduction hole and the second outlet. Is provided with a third valve seat, a third valve body freely arranged to move in contact with the third valve seat, a biasing member for urging the third valve body toward the third valve seat, and the first valve An operating member refurbished between the sieve and the third valve body is provided, and when the first valve body moves within the valve body by the electronic actuator to contact or drop the first valve seat, the operating member or The third valve body is separated from or brought into contact with the third valve seat by the biasing member, and the pressure difference between the front and rear of the second valve body changes through the through hole, so that the second valve body is connected to the second valve seat. It is supposed to fall or contact.

Therefore, it is possible to reliably switch to the refrigerant oil while securing the flow rate of the refrigerant even in an environment where the differential pressure is large, without increasing the size of the electromagnetic coil or the like.

However, in Korean Patent Publication No. 10-2016-0001608, the first valve chamber in which the first valve body is disposed and the second valve body chamber in which the second valve body is disposed are arranged in a horizontal direction, and the first valve chamber and the third valve body are disposed. As the third valve chamber to be arranged is arranged in the longitudinal direction, and the conduction hole communicating the back pressure chamber of the third valve chamber and the second valve chamber is disposed obliquely, the number of assembly parts is complicated, the structure is complicated, and the size in the width direction There was a problem that it was difficult to manufacture because it was small.

References: Japanese Patent Publication No. 2012-002282 The name of the invention "3-way solenoid valve" and Republic of Korea Patent Publication No. 10-2016-0001608 The name of the invention "3-way solenoid valve".

The present invention has been devised to solve the above-mentioned requirements, and since both the first valve body and the second valve body use a differential pressure valve mechanism, the pressure applied to the first and second valve bodies is large. It is possible to easily switch the refrigerant flow path of the valve portion of the first and second valve bodies, and of course, the 3-way solenoid valve is designed to be compact in size by using a spool valve. Its purpose is to provide.

An object of the present invention is to provide a three-way solenoid valve that can be manufactured inexpensively because it has a simple configuration and has fewer assembly parts.

The three-way solenoid valve according to the present invention for achieving the above object is a body provided with a first valve seat provided between the inlet and the first outlet, and a second valve seat installed between the inlet and the second outlet And a first valve body in close contact with or falling from the first valve seat, a second valve body in close contact with or falling from the second valve seat, and an electronic actuator to drive the first valve body. A third pressing member is installed to be elastically pressed toward the pressing portion of the first valve body, and is installed to be pressed toward the first valve body by the third pressing member, and pressed toward the pressing member by the first valve body A spool valve body having a spool valve to be moved is installed, and the spool valve is provided with a back pressure chamber formed at a lower portion of the second valve body and the second discharge while moving up and down of the body. The connection passage installed between the opening and closing, and the spool valve is opened and closed by the first valve body, and as the back pressure of the second valve body changes, the second and second pressures of the second valve body change. It characterized in that the valve body is to open and close the second valve seat.

Here, the movement direction of the first valve body and the second valve body is characterized in that they are on the same axis.

In addition, the spool valve is characterized in that it is driven to directly contact the lower portion of the first valve body.

In addition, the spool valve is characterized in that provided between the first valve body and the second valve body.

As described above, according to the three-way solenoid valve according to the present invention, since the first valve body and the second valve body both use a differential pressure valve mechanism, the two first and second valves can be operated even in an environment where the pressure applied to the valve body is high. Not only can the fluid flow path of the sieve be easily switched, but since the spool valve is configured to be small, it is possible to easily configure the entire three-way solenoid valve to be small.

According to the three-way solenoid valve according to the present invention, because it has a simple configuration, there are fewer assembly parts, and it is possible to manufacture inexpensively.

1 is a perspective view showing a three-way solenoid valve according to an embodiment of the present invention,
Figure 2 is a front view of Figure 1,
3 is a right side view of FIG. 1,
4 is a left side view of FIG. 1,
5 is a plan view of FIG. 1,
Figure 6 is a bottom view of Figure 1,
7 is a rear view of FIG. 1,
Figure 8 is an exploded perspective view showing the three-way solenoid valve of Figure 1,
9 is a cross-sectional view taken along line A-A of FIG. 2 showing a state in which the first valve body is closed and the second valve body is opened by the actuator of the three-way solenoid valve of the present invention;
10 is a sectional view taken along line B-B in FIG. 9,
11 is a cross-sectional view taken along line A-A of FIG. 2 showing a state in which the first valve body is opened and the second valve body is closed by the actuator of the three-way solenoid valve of the present invention;
12 is a cross-sectional view taken along line C-C of FIG. 11.

Hereinafter, a three-way solenoid valve according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

In adding the quotation marks to the components of the drawings, the same components have the same reference numerals as possible even though they are displayed on different drawings, and a known function determined to unnecessarily obscure the subject matter of the present invention And detailed description of the configuration is omitted. In addition, directional terms such as 'top', 'bottom', 'front', 'back', 'tip', 'front', 'end' and the like are used in connection with the orientation of the disclosed drawing (s). Since the components of the embodiments of the present invention can be positioned in various orientations, the directional terms are used for illustrative purposes and are not limiting.

The three-way solenoid valve 1000 according to the present invention, as shown in Figures 1 to 12, the body 1100, the upper core 1200, the electronic actuator 1300, the lower cover 1400, the first It consists of a valve body 1500, a second valve body 1600 and a spool valve body 1700.

Here, the body 1100, the inlet 1110 formed on one side, the first and second outlets 1120, 1130 formed on the other side to communicate with the inlet, and the upper core 1200 is sealed on the upper surface The upper core assembly 1140 is assembled, and the lower cover assembly 1150 is sealed and assembled such that the lower cover 1400 is located on the same axis as the upper core assembly on the lower surface, and the inlet and the first outlet. The first valve seat 1160 installed therebetween, the second valve seat 1170 installed between the inlet port and the second outlet port, and the upper core are disposed parallel to the same axis where the upper core and the lower cover are assembled. The spool valve body accommodating flow path 1180 formed at a certain depth from the upper side of the assembly side and the spool valve body accommodating flow path formed at a certain depth parallel to the spool valve body accommodating flow path from the side where the lower cover is assembled If we cross vertically to communicate The structure has a connection passage 1190 formed to communicate with the second outlet.

Therefore, in the body 1100, the first valve body 1500, the second valve body 1600, and the spool valve body 1700 flow through the fluid flowing into the inlet 1110 according to the operation of the electronic actuator 1300. The first valve body 1500 and the second valve body 1600 are in close contact with or spaced apart from the first valve seat 1160 and the second valve seat 1170 while operating along the first and second discharge ports 1120 and 1130. Is selectively opened and closed.

Here, the upper core 1200, the lower body is accommodated in the upper body assembly portion 1140 of the body 1100, the body assembly portion 1210 is sealed and assembled, the upper portion is the lower axis center of the electronic actuator 1300 Consists of an actuator assembly 1220 that is assembled to be accommodated in the meanwhile, a first valve upper receiving portion 1230 receiving an upper portion of the first valve body 1500 is located below the center of the shaft of the body assembly 1210. The actuator rod assembly 1240 is formed, and the rod 1310 of the electronic actuator 1300 moves in the axial direction and communicates with the first valve upper receiving portion 1230 at the center of the shaft of the actuator assembly 1220. It is formed, the first valve body 1500 is assembled in the upper portion of the first valve 1230, the remaining upper portion and the lower portion of the actuator rod assembly portion 1240 is formed with a constant back pressure chamber (P1).

Therefore, while the upper core 1200 is fixed to the upper portion of the body 1100 and assembled with the electronic actuator 1300, the first valve body 1500 and the rod 1310 of the electronic actuator 1300 are axial. The flow path is configured to guide when moving to.

In addition, the electronic actuator 1300 is configured to block or open a flow path formed at the center of the shaft of the first valve body 1500 while the end of the rod 1310 moves while the rod moves up and down using a known actuator.

Accordingly, the end of the rod 1310 is blocked by the operation of the electronic actuator 1300 to block the flow path formed in the axis center of the first valve body 1500, and then press the first valve body 1500 to press the first valve seat ( When 1160) is blocked, the fluid flowing into the inlet 1110 supplies fluid to the back pressure chamber P1 through a small flow path of the first valve body 1500.

In addition, the lower cover 1400 is assembled to seal the lower portion of the body 1100 while being assembled to the lower cover assembly 1150 of the body 1100, while the upper surface facing the body 1100 is the A pressing member receiving groove 1410 is formed to accommodate the lower surface of the pressing member constituting the second valve body 1600.

Therefore, the lower surface of the body 1100 is sealed by the lower cover 1400 to install the second valve body 1600 to open and close the second valve seat 1170.

Meanwhile, the first valve body 1500 is installed in a space from the top of the body 1100 to the first valve seat 1160 to operate the first valve piston 1160 to open and close the first valve seat 1160 ( 1510) and a first pressing member 1520 installed on the upper core assembly 1140 to press the first valve piston upward.

The first valve piston 1510, the flow passage through hole 1511 formed to penetrate through the center in the axial direction, and formed in parallel with the flow through hole, the fluid flowing from the inlet 1110 into the upper core 1200 A first small flow path 1512 is formed to flow into the back pressure chamber P1 on the side.

In addition, the first valve piston 1510 may be fixed by caulking as the packing 1530 is fitted into the groove 1513 of the lower surface as shown in FIG. 11, as well as a piston on the outer circumferential surface of the first valve piston 1510 The ring 1540 is fitted to move while being axially sealed from the lower portion of the upper core 1200.

Therefore, the first valve piston 1510 is pressed upward from the upper core assembly portion 1140 of the body 1100 by the first pressing member 1520, and the electronic actuator 1300 operates to load 1310. When the first valve piston 1510 is pressed while blocking the flow passage through hole 1511 by advancing), the first valve piston 1510 moves downward to block the first valve seat 1160. The fluid flowing into the inlet 1110 is supplied to the first back pressure chamber P1 through the first small flow path 1512 of the first valve piston 1510 to maintain a pressure balance.

In addition, the second valve body 1600 is installed in the lower cover assembly 1150 of the body 1100, the second valve piston 1610 to open and close the second valve seat 1170 while moving in the axial direction And, one end is supported on the lower portion of the second valve piston 1610 and the other end is in close contact with the upper portion of the lower cover 1400 to press the second valve piston 1610 to the second valve seat 1170. 2 includes a pressing member 1620.

Here, the second valve piston 1610 is spaced apart from the shaft center to form a second small flow path 1611 parallel to the shaft center, and a packing 1630 in close contact with the second valve seat 1170 is seated on the upper surface. The piston ring 1640 is fitted to the outer circumferential surface to operate in the axial direction while being sealed to the lower cover assembly 1150 of the body 1100.

In this embodiment, the packing 1630 shows a state fixed to the upper portion of the second valve piston 1610 with a caulking and a stop ring.

Therefore, the second valve body 1600 is pressed upward in the axial direction by the second pressing member 1620 so that the second valve piston 1610 seals the second valve seat 1170, at this time the inlet While flowing into the second back pressure chamber (P2) through the second small flow path (1611) continuously from the (1110) to the second outlet (1130), the fluid flowing into the second back pressure chamber (P2) is the body ( When it is directed toward the second outlet 1130 through the connection passage 1190 of 1100, when the spool valve body 1700 installed in the spool valve body receiving passage 1180 is blocking the connection passage 1190 In the pressure of the inlet 1110 side and the pressure of the second back pressure chamber (P2) and the connection passage 1190 is in a balanced state.

If the spool valve body 1700 installed in the spool valve body accommodating flow passage 1180 is moved upward and the connection passage 1190 is opened toward the second outlet 1130, the connection passage 1190 and the second back pressure As the seal P2 becomes low pressure, the second valve body 1600 descends from the second valve seat 1170 by the fluid coming from the inlet 1110 side, and thus the fluid entering the inlet 1110 is the second valve seat ( 1170) is directly discharged to the second discharge port (1130).

In addition, the spool valve body 1700, as shown in FIGS. 8 and 9 and 11, the spool valve body (1100) of the spool valve body receiving flow passage 1180 is installed to move up and down the spool valve ( 1710) and a third pressing member 1720 installed inside the spool valve body receiving flow channel 1180 to elastically press the spool valve toward the first valve body 1500.

Here, the spool valve 1710 is formed so as to reduce the outer diameter at a predetermined position on the outer circumferential surface of the hole 1711 formed in the axial direction, and the connection passage 1190 communicates with the connection passage 1190 so that the second outlet 1130 ) Is formed a communication groove (1712) to be in communication.

It is preferable that at least a plurality of O-rings are installed on the outer circumferential surface of the spool valve 1710 for sealing with the spool valve body receiving floating channel 1180.

Therefore, when the electronic actuator 1300 is operated and the rod 1310 is advanced downward, the first valve body 1500 overcomes the elastic force of the first pressing member 1520 and descends, and the first valve body ( 1500) is pressed by the third pressurizing member 1720, the spool valve 1710 supported by the spool valve body receiving floating passage 1180 along the spool valve body receiving floating passage 1180 to descend. As the communication groove 1712 formed on the outer circumferential surface of the spool valve 1710 communicates with the connection passage 1190, the connection passage 1190 communicates with the second outlet 1130 so that the fluid in the connection passage 1190 As it is discharged to the second discharge port 1130, the connection passage 1190 is made into a low pressure state. At this time, as described above, as the connection passage 1190 and the second back pressure chamber P2 become low pressure, the second valve body 1600 is opened in the second valve seat 1170.

As described above, the movement directions of the first valve body 1500 and the second valve body 1600 are on the same axis, and the spool valve body 1700 is directly below the first valve body 1500. The spool valve body 1700 made of the spool valve 1710 and the third pressing member 1720 is installed in contact with each other, and is installed between the first valve body 1500 and the second valve body 1600. It is installed parallel to the same axis of the first valve body 1500 and the second valve body 1600, it is possible to operate a three-way solenoid valve, it can be configured in a small width direction, and the number of parts is small. In addition, the configuration is very simple and can be manufactured inexpensively.

The embodiments described above and illustrated in the drawings should not be interpreted as limiting the technical spirit of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and a person having ordinary knowledge in the technical field of the present invention can improve and modify the technical spirit of the present invention in various forms. Therefore, such improvements and modifications will fall within the protection scope of the present invention if it is apparent to those skilled in the art.

1000: 3-way solenoid valve 1100: body
1200: upper core 1300: electronic actuator
1400: lower cover 1500: first valve body
1600: Second valve body 1700: Spool valve body
1710: spool valve 1720: third pressing member

Claims (4)

A first valve seat provided between the inlet and the first outlet, a body provided with a second valve seat provided between the inlet and the second outlet, a first valve body in close contact with or dropping from the first valve seat, and In the three-way solenoid valve having a second valve body in close contact with or falling off the second valve seat, and an electronic actuator to drive the first valve body,
In the body, a third pressing member is installed to be elastically pressed toward the pressing portion of the first valve body, and is installed to be pressed toward the first valve body by the third pressing member, and by the first valve body It includes a spool valve body consisting of a spool valve that is pressed and moved toward the pressing member,
The spool valve, while moving up and down of the body, opens and closes a connection passage provided between a second back pressure chamber formed at a lower portion of the second valve body and the second outlet,
The spool valve is opened and closed by the first valve body, and the upper and lower pressures of the second valve body are changed as the back pressure of the second valve body is changed so that the second valve body is opened and closed by the second valve seat. Three-way solenoid valve, characterized in that. According to claim 1,
The three-way solenoid valve, characterized in that the movement direction of the first valve body and the second valve body is on the same axis. According to claim 1,
The spool valve is a three-way solenoid valve, characterized in that the direct contact with the lower portion of the first valve body to be driven. According to claim 1,
The spool valve is a three-way solenoid valve, characterized in that provided between the first valve body and the second valve body.

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