TWI615567B - Solenoid valve for beverage supply - Google Patents

Abstract

An object of the present invention is to provide a solenoid valve for a beverage supply device capable of reliably performing sterilization in a short time. The solution of the present invention is to provide a solenoid valve for a beverage supply device. The solenoid valve includes: a piston, which moves linearly by the electromagnetic force of an electromagnetic coil; and a valve body, which is provided at the front end of the piston and is pushed by the valve seat. The valve port is closed by this; the piston of the solenoid valve fixed in the beverage supply device is provided with the front end portion below the base end portion on the opposite side, and the base end portion is away from the inlet of the solenoid valve The direction is inclined with respect to the vertical axis.

Description

Solenoid valve for beverage supply device Field of invention

The present invention relates to a solenoid valve for opening and closing a flow path of a beverage supply device such as a water server.

Background of the invention

In the case of a water stopper of a water dispenser of a drinking water supply device, a solenoid valve operated by a user's operation switch is used instead of a manual cock type. As for the solenoid valve of the drinking water dispenser, the direct-acting solenoid valve is mainly used. Compared with the pilot type, the flow path is relatively simple. Therefore, the direct-acting type is mainly used for sterilization or cleaning. By. Also, in the direct-acting type, a diaphragm type that mainly isolates the beverage in the flow-through solenoid valve from the operating part of the plunger is used.

When the water dispenser needs to sterilize the piping system including the valve regularly, at this time, the sterilization is performed by passing high-temperature water through the piping system as described in Patent Document 1. However, most of the sterilization procedures are performed with the water stopper closed. At this time, high temperature water will circulate in the piping system in the water dispenser, but it will not pass through the water stopper, so there is no part of the water stopper through which the high temperature water passes. It is usually discharged out of the pipeline side, and the heat of the high-temperature water flowing to the vicinity is transmitted through the metal pipe to form a high-temperature state for sterilization. However, at this time, there is a problem that when drinking water remains in a part of the water stopper where no high-temperature water passes, the time required to reach the sterilization temperature becomes considerably longer.

FIG. 6 is a schematic longitudinal sectional view of a solenoid valve 200 used as a water stopper of a water dispenser so far. The solenoid valve 200 includes an inflow pipe 211, an outflow pipe 212, and a valve provided at one end of the inflow pipe 211. The port 213, the electromagnetic coil 216, the piston 217, the valve body 219, the partition plate 221, and the like. In the solenoid valve 200, when the water dispenser is used, when the valve port 213 is closed, the area B on the side of the inflow pipe 211 is filled with water, and water remains in the area C on the side of the outflow pipe 212. Filling the water in area B does not cause sanitary problems, but when the water remaining in area C and the high-temperature water used for sterilization does not pass through area C, it may cause sanitary problems, or even if it does not, The main reason for lengthening the time required for sterilization. This is because the residual water in the area C is in contact with the external atmosphere at one end, and the possibility of adhesion and proliferation of plankton may occur.

Advance technical literature Patent literature

Patent Document 1: Japanese Patent Application Publication No. 2006-021793

Summary of invention

The present invention has been made in view of the foregoing, and its object is to The present invention provides a solenoid valve for a beverage supply device capable of performing sterilization in a short time.

In order to solve the above problems, the present invention provides a solenoid valve for a beverage supply device. The solenoid valve includes: a piston that moves linearly by the electromagnetic force of an electromagnetic coil; and a valve body provided at a front end portion of the piston and held by a valve seat. Push and push to lock the valve port; the piston of the solenoid valve fixed in the beverage supply device is provided with the front end portion below the base end portion on the opposite side, and the base end portion is The direction away from the inlet of the solenoid valve is inclined with respect to the vertical axis.

In this way, by tilting the solenoid valve, a structure without liquid beverage residue in the outflow pipeline can be realized, so a solenoid valve that makes it difficult for microorganisms to reproduce, is easy to sterilize, and is hygienic. In addition, it is possible to realize a solenoid valve in which air accumulation is difficult to occur, or even if air accumulation occurs, the place is limited to the flow path of the beverage liquid or is very close to the flow path, so there is a flow of beverage liquid At this time, the liquid can be used to carry away the accumulated air. Thereby, it is possible to provide a solenoid valve in which there is no obstacle to heat transfer for a part to be sterilized, and sterilization can be performed in a short time.

In the present invention, the piston may have a diameter-enlarged portion, and the diameter-enlarged portion functions to fit into the cylinder portion, thereby reducing the moving speed of the piston. The air inside the enlarged diameter part of the piston and the cylinder part acts as an air damper and reduces the moving speed of the piston. Therefore, the user's liquid can be prevented from splashing when the valve is closed.

In the present invention, the solenoid valve may further include a viscous fluid. The viscous fluid is sealed in a gap between the cylinder portion and the piston, and cooperates with the enlarged diameter portion to reduce the moving speed of the piston. This can still prevent the user's liquid from splashing, especially when the valve is closed.

In the present invention, the valve body may have a conical protrusion at a front end thereof.

In the present invention, the solenoid valve may be a diaphragm type valve, and the valve has a diaphragm that isolates a liquid flowing therethrough from the piston.

The invention further provides a solenoid valve for a beverage supply device. The solenoid valve for the beverage supply device includes a piston that moves linearly by the electromagnetic force of an electromagnetic coil; a valve body is provided at the front end of the piston and is pushed by the valve seat. To block the valve port; and a partition plate to isolate the liquid circulating in the solenoid valve from the piston; the piston of the solenoid valve fixed in the beverage supply device, and the front end portion is arranged relatively The base end portion on the opposite side is further down, and the partition plate is inclined with respect to the horizontal line so that the portion of the partition plate on the side of the center axis of the piston near the inlet of the solenoid valve is farther away from the partition plate on the side. Some are further up.

The present invention also provides a beverage supply device including any of the solenoid valves of the beverage supply device, and in the beverage supply device, the solenoid valve is provided in a bent portion of a flow path.

In the present invention, the aforementioned solenoid valve can also be used for controlling external water injection.

1,2,3,4‧‧‧ solenoid valve

11‧‧‧ Inflow pipeline

11a‧‧‧Inlet

12‧‧‧ Outflow pipeline

12a‧‧‧ Outlet

13‧‧‧Valve

14‧‧‧Valve seat

15‧‧‧Valve housing

16‧‧‧ Solenoid Coil

17‧‧‧Piston

18‧‧‧Cylinder Department

19‧‧‧Valve body

20‧‧‧Compression coil spring

21‧‧‧ partition

22‧‧‧Expansion Department

23‧‧‧ protrusion

24‧‧‧O-ring

30‧‧‧Spitting water pipe

100,200‧‧‧Solenoid valve

111,211‧‧‧ Inflow

112,212‧‧‧Outflow pipeline

113,213‧‧‧Valve

116,216‧‧‧Electromagnetic coils

117,217‧‧‧Piston

119,219‧‧‧Valve body

121,221‧‧‧ bulkhead

B, C‧‧‧ Field

Ag‧‧‧ vertical axis

Ap‧‧‧long axis

θ‧‧‧ tilt angle

FIG. 1 is a schematic longitudinal sectional view of a solenoid valve of a beverage supply device according to a first embodiment of the present invention.

Fig. 2 is a schematic longitudinal sectional view of a solenoid valve of a beverage supply device according to a second embodiment of the present invention.

Fig. 3 is a schematic longitudinal sectional view of a solenoid valve of a beverage supply device according to a third embodiment of the present invention.

Fig. 4 is a schematic longitudinal sectional view of a solenoid valve of a beverage supply device according to a fourth embodiment of the present invention.

5 is a schematic longitudinal sectional view of a solenoid valve of a beverage supply device according to a related art of the present invention.

Fig. 6 is a schematic longitudinal sectional view of a solenoid valve of a conventional beverage supply device.

Detailed description of the preferred embodiment

Before explaining the solenoid valve of the beverage supply device according to the embodiment of the present invention, referring to FIG. 5 of the schematic longitudinal sectional view, the solenoid valve of the beverage device constructed according to the related technology of the present invention will be described.

The solenoid valve 100 shown in FIG. 5 is considered to be completed in order to prevent the occurrence of residual water on the outflow pipe side of the conventional solenoid valve 200 shown in FIG. 6, and includes: an inflow pipe 111 and an outflow pipe. A passage 112, a valve port 113, an electromagnetic coil 116, a piston 117, a valve body 119, and a partition plate 121 provided at one end of the aforementioned outflow pipe 112. According to this solenoid valve 100, the valve port 113 is provided at one end of the outflow pipe 112 and the outflow pipe is extended downward, so that no residual water is generated on the outflow pipe side. However, in the In the solenoid valve 100, as long as a water dispenser is used, the area indicated by A in FIG. 5 in the flow path above the valve body 119 will generate trapped air with accumulated air, which has been confirmed. It is desirable to remove the trapped air because it can cause microbial growth and heat transfer to the parts to be sterilized.

Next, the solenoid valve 1 of the beverage supply device according to the first embodiment of the present invention will be described below with reference to FIG. 1 of the schematic longitudinal sectional view. This solenoid valve 1 is installed in places where the direction of the water flow path is changed (curved portion of the flow path), thereby suppressing residual water flow or stagnant air, and is particularly effective for water injection of a beverage supply device or the like.

The “beverage supply device” in this manual will be explained at the beginning. This device refers to the water used in the internal water tank or the beverage liquid such as tea. Device. The device is used on a table or a floor. Taking such a device as an example, the water dispenser described in Patent Document 1 is taken as an example. In this specification, the water dispenser is also taken as an example to describe the invention as a beverage supply device.

In addition, the present invention relates to a solenoid valve of a beverage supply device and has technical features. In this specification, detailed descriptions and illustrations of a beverage supply device or a water dispenser are omitted.

In the first embodiment, the solenoid valve 1 is operated as a water stopper of a water dispenser, and a tip portion of a water discharge pipe 30 of the water dispenser is attached. The solenoid valve 1 is a direct-acting type. The main constituent elements include: an inflow pipe 11 having an inflow port 11a at the end and extending substantially horizontally; an outflow pipe 12 having a valve port 13 at the end. It has an outflow port 12a at the lower end portion and is substantially vertical Extending below; valve seat 14, surrounding valve port 13; valve housing 15; electromagnetic coil 16; piston 17, linearly moved by the electromagnetic force of electromagnetic coil 16; cylinder portion 18 of valve housing 15, guiding the movement of piston 17; valve body 19, fixed to the front end of the piston 17, or integrally formed with the front end of the piston 17; a compression coil spring 20 housed in the cylinder portion 18, and pushing and pushing the end surface of the base end portion of the piston 17; and a partition plate 21 extending at The fluid between the valve body 19 and the valve housing 15 is isolated from the piston 17, and is made of rubber in this embodiment. The front end portion of the piston 17 is provided below the base end portion on the opposite side.

Since the solenoid valve 1 is configured as described above, when the solenoid 16 is not energized, the valve body 19 is pushed against the valve seat 14 by the force generated by the spring 20 to lock the valve port 13. On the other hand, the user operates the water-filling button (not shown) of the water dispenser to energize the electromagnetic coil 16 so that the generated electromagnetic force overcomes the force exceeding the spring 20, and as the piston 17 moves, the valve The seat 14 lifts the valve body 19, thereby opening the valve port 13 and spit out drinking water.

In addition, as shown in FIG. 1, each component of the solenoid valve 1 except for the inflow line 11 and the outflow line 12 faces obliquely with respect to the vertical axis Ag or the horizontal axis indicating the direction of gravity. In this embodiment, the piston 17 is inclined from the vertical axis Ap to the vertical axis Ag by about 25 ° in a counterclockwise direction in FIG. 1, that is, the base 17 of the piston 17 is inclined away from the inlet 11 a in a direction away from it. 25 °. Similarly, the contact surface with the valve seat 14 of the valve body 19 is inclined from the horizontal axis by about 25 ° in the counterclockwise direction in FIG. 1.

The water discharge pipe 30 of the water dispenser shown in FIG. 1 extends a horizontal end portion connected to the solenoid valve 1. Therefore, the solenoid valve 1 for connecting the inflow pipeline 11 to the water discharge pipeline 30 and the contact surfaces of the piston 17 and the valve body 19 are the same as those described above. Similarly, with respect to the vertical axis Ag or the horizontal axis, it is fixed to the water dispenser in a state of being tilted about 25 ° counterclockwise in FIG. 1.

In addition, the solenoid valve 1 of FIG. 1 is connected to and fixed to the spouting pipe 30 through a female screw portion formed at an end portion before the inflow pipe 11 and a male threading portion at a distal end portion of the spouting pipe 30. This connection and fixation can be replaced by other various known pipe-type or flange-type nozzles.

In the first embodiment, as shown in FIG. 1, the solenoid valve 1 is inclined and fixed, and is lower than the area on the left side of the valve body 19 and the area on the right side. As a result, when the valve port 13 is closed, air trapped in at least the left side of the valve body 19 of the water retained in the valve body 19 does not occur. On the other hand, in the area on the right side of the valve body 19, there is a possibility that trapped air may occur. However, even if the trapped air occurs in the solenoid valve of FIG. 1, the occurrence is on the water circulation path or is very close to the circulation path. Therefore, each time water is circulated, it will be carried away by water and will not accumulate. While expanding. In addition, of course, no water remains in the outflow pipe 12.

In the first embodiment, the inclination angle θ of the vertical axis Ag of the piston 17 of the solenoid valve 1 fixed to the water discharge pipe 30 is set to about 25 °, but in the present invention, the inclination angle θ is 10 ° to 40 ° is an appropriate range. Therefore, it is of course possible to implement an embodiment in which the inclination angle θ is other than 25 °. In the present invention, the inclination angle θ, the shape and size of the constituent elements such as the valve seat 14, the valve body 19, the inflow line 11, the outflow line 12, and the partition plate 21 of the solenoid valve 1 and their mutual positions It is understandable that the optimum value may be changed.

Next, the solenoid valve 2 of the beverage supply device according to the second embodiment will be described with reference to FIG. 2. The solenoid valve 2 of this embodiment is different from the solenoid valve 1 of the first embodiment in that the piston 17 has an enlarged diameter portion 22; and the valve body 19 has a conical protruding portion 23 on the side that is in contact with the valve seat 14. However, since the other parts are the same as the solenoid valve 1 of the first embodiment, only the different parts will be described.

The piston 17 of the solenoid valve 2 shown in FIG. 2 is guided by the cylinder portion 18 of the valve housing 15 as in the first embodiment, but an enlarged diameter is formed between the front end portion and the base end portion.径 部 22。 The diameter section 22. In order to reduce the moving speed of the piston 17, that is, to increase the diameter of the piston 17, that is, to cooperate with the air in the cylinder portion to exert the function of an air damper, the outer diameter is made slightly smaller than the inner diameter of the cylinder portion 18. If the moving speed of the piston 17 is reduced, especially when the valve is closed, that is, the piston 17 is moved by being pushed and pushed by the spring 20, so that when the valve body 19 closes the valve seat 14, the amount of the material extruded from the outflow pipe 12 is reduced. The speed of water prevents splashing of liquid to the user.

The conical projection 23 formed in the valve body 19 enters the valve port 13 from the front end when the valve is closed. Since the conical protrusion 23 is provided, it is possible to change the direction in which the water is pushed out when the valve is closed, and to reduce the amount of water that is pushed out. As a result, splashing of the liquid can be prevented.

Next, the solenoid valve 3 of the beverage supply device according to the third embodiment will be described with reference to FIG. 3. The solenoid valve 3 of this embodiment is different from the solenoid valve 1 of the first embodiment in that a viscous fluid such as oil is enclosed in the cylinder portion 18 to exhibit the function of an oil damper. However, since the other parts are the same as the solenoid valve 1 of the first embodiment, only the different parts will be described.

The solenoid valve 3 of the third embodiment is used to transfer viscous fluid such as oil. It is enclosed in the cylinder portion 18, and an O-ring 24 is arranged near the exit of the cylinder portion 18. Further, the piston 17 has an enlarged diameter portion 22 in the same manner as the second embodiment. However, in consideration of the viscosity of the oil, the enlarged diameter portion 22 of the piston 17 of the third embodiment is formed to have a size larger than that of the second embodiment.

In the solenoid valve 3 according to the third embodiment, when the valve is closed, the oil existing in the cylinder chamber below the enlarged diameter portion 22 of the piston 17 moves through the gap between the piston 17 and the lower side of FIG. 3. The viscous impedance when moving into the cylinder chamber on the upper side of the enlarged diameter portion 22 slows down the moving speed of the piston 17. As a result, as in the case of the second embodiment, the speed of the water squeezed out of the outflow pipe 12 is reduced, so that it is possible to prevent the user from splashing liquid.

Next, the solenoid valve 4 of the beverage supply device according to the fourth embodiment will be described with reference to FIG. 4. This solenoid valve 4 is different from the above-mentioned embodiment and is a form without a partition. However, the other points are basically the same as those of the solenoid valve 1 of the first embodiment.

In the fourth embodiment, the solenoid valve 4 also causes the long axis Ap of the piston 17 to be tilted about 25 ° from the vertical axis Ag showing the direction of gravity in the counterclockwise direction of FIG. 4, and is connected to the spit of the water dispenser. The water pipe 30 is lower in the area from the left side of the valve body 19 than the area on the right side. As a result, when the valve is closed, no air stagnation occurs in the area on the left side of FIG. 4 of the valve body 19 of the water remaining around the valve body 19. On the other hand, there is a possibility that air stagnation may occur in a region to the right of the valve body 19. However, even if the air is trapped, even if the solenoid valve in FIG. 4 occurs, the place where it occurs is close to the water circulation path. Therefore, it will be transported away every time the water circulates, and it will not accumulate and expand.

Although not shown in the figure, an embodiment in which the diameter of the inflow pipe 11 of the solenoid valve 4 of the fourth embodiment is enlarged toward the upper side, thereby suppressing the occurrence of air stagnation in the right area of the valve body 19 is also possible.

Although it is not shown in the figure, in order to suppress the occurrence of trapped air in the right area of the valve body 19 of the solenoid valve 4 of the fourth embodiment, the thickness of the valve housing 15 is increased to the inside to fill the gap in the area Form may also be realized.

The solenoid valve 4 according to the fourth embodiment has been described in the aforementioned second embodiment, that is, the characteristics of the so-called enlarged diameter portion 22 of the piston 17 and the conical protrusion portion 23 of the valve body and 19; and The third embodiment explains that the features of the so-called oil damper function may be implemented separately or in combination according to circumstances.

1‧‧‧ Solenoid Valve

11‧‧‧ Inflow pipeline

11a‧‧‧Inlet

12‧‧‧ Outflow pipeline

12a‧‧‧ Outlet

13‧‧‧Valve

14‧‧‧Valve seat

15‧‧‧Valve housing

16‧‧‧ Solenoid Coil

17‧‧‧Piston

18‧‧‧Cylinder Department

19‧‧‧Valve body

20‧‧‧Compression coil spring

21‧‧‧ partition

30‧‧‧Spitting water pipe

Ag‧‧‧ vertical axis

Ap‧‧‧long axis

θ‧‧‧ tilt angle

Claims (7)

A solenoid valve for a beverage supply device includes a piston that moves linearly by the electromagnetic force of an electromagnetic coil; a valve body provided at a front end portion of the piston and pushed by a valve seat to lock a valve port; To guide the movement of the piston and fix the piston of the solenoid valve in the beverage supply device, the front end portion is disposed below the base end portion on the opposite side, and the base end portion is The direction away from the inlet of the solenoid valve is inclined with respect to the vertical axis, wherein the piston has an enlarged diameter portion, and the enlarged diameter portion operates as follows: the enlarged diameter portion is fitted into the cylinder portion so that The moving speed of the aforementioned piston decreases. For example, the solenoid valve of the beverage supply device of claim 1 further includes a viscous fluid, which is sealed in the gap between the cylinder portion and the piston, and the piston is operated in cooperation with the enlarged diameter portion. The movement speed is reduced in a way that works. The solenoid valve of the beverage supply device according to claim 1 or 2, wherein the valve body has a conical protrusion at a front end thereof. The solenoid valve of the beverage supply device according to claim 1 or 2 is a diaphragm-type valve having a diaphragm that isolates a liquid circulating in the solenoid valve from the piston. A solenoid valve for a beverage supply device includes: The piston moves linearly by the electromagnetic force of the electromagnetic coil; the valve body is provided at the front end of the piston, and is pushed and pushed by the valve seat, thereby closing the valve port; The piston is isolated; and the cylinder part guides the movement of the piston, and the piston of the solenoid valve fixed in the beverage supply device is provided with the front end portion lower than the base end portion on the opposite side. The central axis of the piston tilts the partition plate with respect to a horizontal line, so that a portion of the partition plate on the side closer to the inlet of the solenoid valve is located at a position higher than a portion of the partition plate on the far side. The piston has an enlarged diameter portion, and the enlarged diameter portion operates in such a manner that the moving speed of the piston is reduced by fitting the enlarged diameter portion to the cylinder portion. A beverage supply device includes a solenoid valve of the beverage supply device according to claim 1 or 2, and the solenoid valve is provided in a curved portion of a flow path. The beverage supply device according to claim 6, wherein the solenoid valve is used for controlling external water injection.