JP2022049938A - Electric drive valve - Google Patents

Abstract

To simplify a manufacturing process of an electric drive valve to reduce manufacturing costs and reduce a height of the drive valve.SOLUTION: An electric drive valve includes: a cylindrical casing 11 having a valve chamber 12 therein; an inflow pipe; a first outflow pipe 14 and a second outflow pipe 15; a first valve seat member 32 which includes a first valve seat 41 and is disposed in the valve chamber so as to communicate with the first outflow pipe; a second valve seat member 33 which includes a second valve seat 42 and is disposed in the valve chamber to communicate with the second outflow pipe 15; piston members 36, 37 which include a first valve body 34 and a second valve body 35 and are disposed so as to be movable in an axial direction (a vertical direction) of the casing; a biasing member 25 which biases the piston members downward; and an electric drive device 21 which moves the piston members upward against biasing force of the biasing member. The first valve seat member is a pipe member which extends horizontally in the valve chamber and in which the first valve seat is formed on an upper peripheral wall. The second valve seat member is a pipe member which extends horizontally in the valve chamber and in which the second valve seat is formed on a lower peripheral wall.SELECTED DRAWING: Figure 1

Description

The present invention relates to an electrically driven valve, and more particularly to a three-way solenoid valve and a two-way solenoid valve.

Electrically driven valves that control fluid flow are widely used today in various industrial fields and household products. For example, a three-way solenoid valve is used to switch the flow path and control the opening / closing of various devices such as air conditioners, freezers, refrigerators, vending machines, and other devices equipped with refrigeration cycles, and water heaters, fully automatic washing machines, etc. It is equipped with a two-way solenoid valve.

Further, the following patent documents disclose a three-way solenoid valve which is a kind of such an electrically driven valve. In the following description, a solenoid valve will be described as a typical example, but the present invention can be applied to, for example, an electric valve driven by a motor, and the present invention is not necessarily limited to the solenoid valve. is not it.

Japanese Unexamined Patent Publication No. 2009-257475

By the way, in the solenoid valve described in Patent Document 1, the valve seat member 7 for selectively leading out the fluid flowing into the valve from the inflow pipe 13 to any one of the two outflow pipes 14 and 15 is a block-shaped metal. It is composed of members. For this reason, cutting is required to manufacture the valve seat member 7, which takes time and increases the manufacturing cost of the solenoid valve.

Specifically, in the production of the valve seat member 7, there are five directions, that is, from the upper surface forming the first continuous passage 7c, the first valve opening 7f and the second continuous passage 7d, and the second valve opening 7g and the third. Drill from the lower surface forming the communication passage 7e and from a total of five directions (left / right and front / rear) of the peripheral surface forming the inflow pipe 13, the first outflow pipe 14, and the second outflow pipe 15, respectively. It is necessary to drill holes with.

Furthermore, there is room for improvement in conventional solenoid valves not only in terms of manufacturing issues, but also in terms of downsizing the solenoid valve, especially in terms of reducing the height and height.

Specifically, various refrigerating / refrigerating devices equipped with a refrigerant circuit, such as a commercial refrigerating showcase and a refrigerating showcase, are used in stores and commercial facilities, and these devices generally house products. A refrigerant circuit including a solenoid valve and a refrigerant pipe is arranged on the bottom surface or the top surface of the case body.

Therefore, if the refrigerant circuit can be made as thin as possible (height can be suppressed), the capacity of the showcase main body that houses the product can be increased by that amount, or the entire showcase can be miniaturized to save space. It is also possible to realize the conversion.

Therefore, an object of the present invention is to simplify the manufacturing process of the electrically driven valve and reduce the manufacturing cost. Further, another object of the present invention is to make it possible to suppress the height of the electrically driven valve.

[First invention]
In order to solve the above-mentioned problems and achieve the object, the electrically driven valve (hereinafter, may be simply referred to as “driving valve”) according to the first invention of the present application has two fluids that have flowed into the valve chamber. It is a three-way valve that enables switching of the flow path by selectively flowing out from either one of the outflow pipes (first outflow pipe and second outflow pipe).

Specifically, the drive valve has a tubular casing having a valve chamber inside, an inflow pipe for inflowing fluid into the valve chamber, a first outflow pipe for flowing fluid from the valve chamber, and fluid from the valve chamber. A second outflow pipe that is provided with a first valve seat and is arranged in the valve chamber so as to communicate with the first outflow pipe, and a second outflow pipe that is provided with a second valve seat and communicates with the second outflow pipe. A second valve seat member arranged in the valve chamber so as to be provided, a piston member provided in the first valve body and the second valve body and movably arranged in the casing in the axial direction of the casing, and an axial direction of the casing. It is provided with an urging member that urges the piston member downward and an electric drive device that moves the piston member upward against the urging force of the urging member.

Further, the first valve body is in a valve closed state in which the first valve seat is seated to prevent the fluid from flowing out through the first outflow pipe, and the first valve body is separated from the first valve seat and the fluid passes through the first outflow pipe. It is possible to move forward and backward with respect to the first valve seat with the valve open state that allows outflow. Further, the second valve body is in a valve closed state in which the fluid is seated on the second valve seat to prevent the fluid from flowing out through the second outflow pipe, and the fluid is separated from the second valve seat and passed through the second outflow pipe. It is possible to move forward and backward with respect to the second valve seat with the valve open state that allows outflow.

Further, in the drive valve, when the piston member is displaced downward due to the urging force of the urging member, the first valve body is seated on the first valve seat and the second valve body is separated from the second valve seat. Allows fluid to flow out of the valve chamber through the second outflow pipe. On the other hand, when the electric drive device displaces the piston member upward, the second valve body is seated on the second valve seat and the first valve body is separated from the first valve seat, thereby causing the first outflow pipe. The fluid flows out of the valve chamber through.

Further, the first valve seat member is a pipe member extending in the valve chamber in a direction orthogonal to the axial direction of the casing and having the first valve seat formed on the upper peripheral wall, and the second valve seat member is A pipe member extending in the valve chamber in a direction orthogonal to the axial direction of the casing and having the second valve seat formed on the lower peripheral wall.

In the first invention of the present application, since the valve seat member (first valve seat member and second valve seat member) is composed of a pipe member, the valve seat member is manufactured by press working (for example, bulge forming or drawing). It is possible to eliminate the need for cutting. Therefore, it is possible to simplify the manufacturing process of the drive valve, improve the manufacturing efficiency, and reduce the manufacturing cost.

Further, since the valve seat member is arranged so as to extend in a direction orthogonal to the axial direction of the casing (also referred to as "horizontal direction"), the outflow pipe connected to the valve seat member is valved in order to discharge the fluid from the valve chamber. It can be connected horizontally to the chamber (casing) (from the direction orthogonal to the axial direction of the casing). Therefore, by connecting the inflow pipe through which the fluid flows horizontally to the valve chamber (casing), all the pipes (inflow pipe and outflow pipe) connected to the valve chamber (casing) are connected horizontally. It can be routed and the height dimension of the drive valve can be kept small.

The "vertical direction" referred to in the present application (the first invention described above, the second invention described later, and each aspect) means the axial direction of the casing, and does not necessarily indicate the vertical direction. That is, in the present application, "upper" does not mean the direction opposite to gravity and "lower" does not mean the direction of gravity. In the present application, one of the axial directions of the casing is "upper" and the other direction ("upper"). The opposite direction) is simply called "down". For example, when the electromagnetic valves of each embodiment (FIG. 1 etc.) described later are used in the illustrated state, the "vertical direction" corresponds to the vertical direction, the "bottom" is the gravity direction, and the "top" is gravity. Although it is in the opposite direction, when the electromagnetic valve is used in a state of being rotated 180 ° from the state shown in the figure, "upper" is in the direction of gravity and "lower" is in the direction opposite to gravity. , When used in a 90 ° sideways position, the vertical direction is perpendicular to the vertical direction. Further, when the installation is performed in a slanted state, the slanted direction is the vertical direction.

[First aspect of the first invention]
In the first aspect of the invention, as the first aspect, both the first valve seat member and the second valve seat member are composed of a pipe member having both ends open, and the first outflow to one end of the first valve seat member. The pipe is connected, and the other end of the first valve seat member is closed by brazing to the inner peripheral surface of the casing, and the second outflow pipe is connected to one end of the second valve seat member to connect the second valve seat. The other end of the member is closed by brazing to the inner peripheral surface of the casing. This is to fix and support the other ends of both valve seat members (first valve seat member and second valve seat member) to the casing and prevent fluid from leaking from the other ends.

Further, in the first aspect, a recess recessed downward is provided on the upper peripheral surface of the first valve seat member, the recess is provided with the first valve seat, and the lower peripheral surface of the second valve seat member is provided. A recess recessed upward may be provided, and the recess may be provided with a second valve seat. According to such a structure, the height of the drive valve can be further reduced.

[Second aspect of the first invention]
In the second aspect of the first invention, both the first valve seat member and the second valve seat member are formed of a pipe member having one end open and the other end closed, and the first valve seat member has one end. One outflow pipe is connected, and the second outflow pipe is connected to one end of the second valve seat member.

According to such an embodiment, the other ends of both valve seat members (first valve seat member and second valve seat member) are brazed to the inner peripheral surface of the casing so as to be closed by processing at the time of assembling the drive valve. Compared with the first aspect and the like), the labor of the closing work can be saved, and the fluid can be more reliably prevented from leaking from the other end.

In the first invention and each aspect, typically, the first valve seat member and the second valve seat member are arranged in the valve chamber so as to be stacked vertically.

[Third aspect of the first invention]
Further, in the third aspect of the first invention, both the first valve seat member and the second valve seat member are pipe members having one end open and the other end closed, and the first valve seat member is the open end. A first outflow pipe connecting portion for connecting the first outflow pipe is provided on one end side thereof, and a portion on the other end side of the first outflow pipe connecting portion is provided with a vertical dimension of the first outflow pipe connecting portion. The lower peripheral wall is made flat so as to be smaller and the lower peripheral wall is formed so as to be located above the lower end of the first outflow pipe connection portion, and the second valve seat member is the open one end. A second outflow pipe connecting portion for connecting the second outflow pipe is provided on the side, and the portion on the other end side of the second outflow pipe connecting portion is smaller in vertical dimension than the second outflow pipe connecting portion. As described above, the upper peripheral wall is made flat and has a low back portion formed so that the upper peripheral wall is located below the upper end of the second outflow pipe connection portion, and the lower peripheral wall of the first valve seat member and the upper side of the second valve seat member are formed. The first valve seat member and the second valve seat member are arranged so that the peripheral wall is overlapped and the low back portion of the first valve seat member and the low back portion of the second valve seat member are stacked vertically.

According to such a third aspect, by arranging the first valve seat member and the second valve seat member so as to overlap the flatly formed low back portions, both valve seat members can be stably valved. It can be installed indoors. Further, by arranging the low back portions so as to overlap each other, it is possible to further reduce the height of the drive valve.

[Fourth aspect of the first invention]
The drive valve according to the fourth aspect of the first invention includes a tubular casing having a valve chamber inside, an inflow pipe for flowing fluid into the valve chamber, and a first outflow pipe for flowing fluid from the valve chamber. , A second outflow pipe that allows fluid to flow out of the valve chamber, and a valve seat member that is provided with a first valve seat and a second valve seat and is arranged in the valve chamber so as to communicate with the first outflow pipe and the second outflow pipe. A piston member having a first valve body and a second valve body and movably arranged in the casing in the axial direction of the casing, and an attachment that urges the piston member downward when the axial direction of the casing is in the vertical direction. It includes a urging member and an electric drive device that moves the piston member upward against the urging force of the urging member.

In the drive valve, the first valve body sits on the first valve seat to prevent the fluid from flowing out through the first outflow pipe, and the first valve seat is separated from the first valve seat and through the first outflow pipe. It is possible to move forward and backward with respect to the first valve seat to and from the valve open state that allows the outflow of fluid, and the second valve body sits on the second valve seat and the fluid flows out through the second outflow pipe. It is possible to move forward and backward with respect to the second valve seat between the closed state in which the valve is closed and the valve open state in which the fluid is allowed to flow out through the second outflow pipe away from the second valve seat.

Further, when the piston member is displaced downward due to the urging force of the urging member, the first valve body is seated on the first valve seat and the second valve body is separated from the second valve seat through the second outflow pipe. While the fluid is discharged from the valve chamber, when the electric drive device displaces the piston member upward, the second valve body is seated on the second valve seat and the first valve body is separated from the first valve seat. The fluid is drained from the valve chamber through the first outflow pipe.

Further, the valve seat member is a pipe member having both ends open, is arranged so as to extend in a direction orthogonal to the axial direction of the casing in the valve chamber, and is connected to the first outflow pipe to which the first outflow pipe is connected. A portion is provided at one end, a second outflow pipe connection portion to which the second outflow pipe is connected is provided at the other end, a first valve seat is provided on the upper peripheral wall, and a second valve seat is provided on the lower peripheral wall. A partition that divides the internal space of the valve seat member into a first valve seat chamber including the first outflow pipe connection portion and the first valve seat, and a second valve seat chamber including the second outflow pipe connection portion and the second valve seat. It has a board.

According to such a fourth aspect, the valve seat member can be composed of one member, the number of parts can be reduced, and two valve seat members (with the first valve seat member) can be used. Since only one valve seat member is required as compared with the structure in which the second valve seat member) is stacked and arranged vertically, the height of the drive valve can be further suppressed.

The partition plate provided in the fourth aspect is, for example, closer to the second outflow pipe connection portion than the first valve seat from the lower end of the inner peripheral surface of the valve seat member closer to the first outflow pipe connection portion than the second valve seat. A flat plate member that rises diagonally upward toward the upper end of the inner peripheral surface of the valve seat member.

According to such a structure, the fluid flowing into the outflow pipe (the fluid flowing downward from the first valve seat into the outflow pipe and the fluid flowing upward from the second valve seat into the outflow pipe) hits the diagonal partition plate. Since it is easy to change the direction of the flow from the vertical direction to the horizontal direction, the flow of the fluid in the valve can be smoothed. Further, when connecting the first outflow pipe and the second outflow pipe to the valve seat member, both outflow pipes can be positioned by abutting each end of the diagonally installed partition plate, for example, after. As described in the embodiment of the above, stable work can be performed when both outflow pipes are brazed and fixed to the casing.

Further, as another configuration of the partition plate, the partition plate is intermediate in the length direction of the valve seat member in the internal space of the valve seat member including the lower space of the first valve seat and the upper space of the second valve seat. The horizontal plate portion that spreads so as to divide the portion into upper and lower parts, the first vertical plate portion that descends downward from the end portion of the horizontal plate portion on the side close to the first outflow pipe connection portion, and the horizontal plate portion. It may have a second vertical plate portion that rises upward from the end portion on the side close to the second outflow pipe connection portion. Even with such a structure, each outflow pipe can be provided by abutting the first outflow pipe against the first vertical plate portion and the second outflow pipe against the second vertical plate portion, as in the case of the partition plate installed diagonally. It can be positioned and the stability of connection work can be ensured.

[Second invention]
The electrically driven valve according to the second invention of the present application has a feature that the valve seat member is composed of a pipe member as in the first invention, but unlike the first invention, it has a flow path. It relates to a two-way valve that opens and closes (closes and opens).

Specifically, the drive valve is provided with a tubular casing having a valve chamber inside, an inflow pipe for inflowing fluid into the valve chamber, an outflow pipe for flowing fluid from the valve chamber, and a valve seat. A valve seat member arranged in the valve chamber so as to communicate with either a pipe or an inflow pipe, a piston member provided in the valve body and movable in the axial direction of the casing, and a casing shaft. It includes an urging member that urges the piston member downward when the direction is up and down, and an electric drive device that moves the piston member upward against the urging force of the urging member.

Further, the valve body can move forward and backward with respect to the valve seat between a valve closed state in which the valve seat is seated to shut off the flow path and a valve open state in which the flow path is opened away from the valve seat. When the piston member is displaced downward due to the urging force of the urging member, the valve body sits on the valve seat to block the flow path, while when the electric drive device displaces the piston member upward, the valve body is displaced. The flow path is opened by separating from the valve seat.

Then, the valve seat member was made into a pipe member extending in the valve chamber in a direction orthogonal to the axial direction of the casing and having a valve seat formed on the upper peripheral wall.

Also in the second invention of the present application, since the valve seat member is composed of the pipe member as in the first invention, the drive valve manufacturing process is simplified and the drive valve is manufactured as in the first invention. Efficiency can be improved and manufacturing costs can be reduced. Further, by arranging the valve seat member in the direction orthogonal to the axial direction of the casing, it is possible to keep the height dimension of the drive valve small.

Further, the drive valve according to the second invention described above opens a flow path (opens) when the electric drive device is operated (during operation), and does not operate the electric drive device (non-operation). It is a two-way valve that closes (closes) the flow path during operation) (the two-way valve is called a "normally closed two-way valve"), but conversely, it is an electric drive device. A two-way valve that closes (closes) the flow path when operating and opens (opens) the flow path when the electrical drive device is not operating (the two-way valve is "always open two-way valve". It is possible to configure (referred to as) in the same manner.

Specifically, the normally open two-way valve has a tubular casing having a valve chamber inside, an inflow pipe for inflowing fluid into the valve chamber, an outflow pipe for flowing fluid from the valve chamber, and a valve seat. A valve seat member provided in the valve chamber so as to communicate with either an outflow pipe or an inflow pipe, and a piston member provided with a valve body and arranged in the casing so as to be movable in the axial direction of the casing. , Equipped with an urging member that urges the piston member downward when the axial direction of the casing is in the vertical direction, and an electric drive device that moves the piston member upward against the urging force of the urging member. The valve body can move forward and backward with respect to the valve seat between a valve closed state in which the valve seat is seated and shuts off the flow path and a valve open state in which the flow path is opened away from the valve seat. When the piston member is displaced downward due to the urging force of the urging member, the valve body separates from the valve seat to open the flow path, while when the electric drive device displaces the piston member upward, the valve body valves. An electrically driven valve that shuts off the flow path by sitting on the seat, the valve seat member extends in the direction orthogonal to the axial direction of the casing in the valve chamber, and the valve seat is formed on the lower peripheral wall. It is a pipe member.

[First aspect of the second invention]
In the second aspect of the invention, as the first aspect, the valve seat member has a recess, and the recess is provided with a valve seat. According to such a structure, the height of the drive valve can be kept lower. In the normally closed two-way valve, the recess is formed so as to be recessed downward on the upper peripheral surface of the valve seat member. Further, in the always-open type two-way valve, the recess may be formed so as to be recessed upward on the lower peripheral surface of the valve seat member.

[Second aspect of the second invention]
Further, in the second aspect of the second invention, in the normally closed two-way valve, the casing is a bottomed open tubular member, and the casing is lowered to the intermediate portion between one end and the other end of the valve seat member. It is provided with a bulge that protrudes into the bottom of the casing and abuts on the bottom of the casing. This is to increase the supporting strength of the valve seat member.

[Third aspect of the second invention]
Further, in the third aspect of the second invention, both ends of the valve seat member are opened in the normally closed type two-way valve and the normally open type two-way valve (the same applies to the fourth to sixth aspects). One of the outflow pipe and the inflow pipe is connected to one end of the valve seat member, and the other end of the valve seat member is brazed to the inner peripheral surface of the casing to close the pipe member.

[Fourth aspect of the second invention]
Further, in the fourth aspect of the second invention, the valve seat member is a pipe member having one end open and the other end closed, and one of the outflow pipe and the inflow pipe is connected to the one end. According to such an aspect, as in the second aspect of the first invention, it is possible to save the trouble of closing the other end of the valve seat member by brazing or the like, and the fluid leaks from the other end. Can be prevented more reliably.

[Fifth aspect of the second invention]
Further, in the fifth aspect of the second invention, in the fourth aspect of the second invention described above, the outflow pipe and the inflow pipe are projected from the other end of the valve seat member in a direction orthogonal to the axial direction of the casing. Inside the valve chamber side end or casing of the other of them (that is, the inflow pipe when the outflow pipe is connected to one end of the valve seat member, and the outflow pipe when the inflow pipe is connected to one end of the valve seat member). It has a protrusion that can be fixed to the peripheral surface. According to such an embodiment, the valve seat member is more firmly installed in the valve chamber by, for example, brazing the protruding portion to the valve chamber side end of the inflow pipe or the outflow pipe or the inner peripheral surface of the casing. Can be done.

[Sixth aspect of the second invention]
Further, in the sixth aspect of the second invention, in the fourth aspect of the second invention described above, the flange of the valve seat member projects outward from the peripheral wall end portion of the valve seat member and abuts on the outer peripheral surface of the casing. Provided at one end. This is to enable the valve seat member to be more firmly installed at a predetermined position in the valve chamber as in the fifth aspect.

The present invention typically targets a solenoid valve driven by a solenoid as in the embodiment described later, but is not limited to this as described above, and is also applied to an electric valve driven by a motor or the like. Is possible.

Further, when the valve seat member of the present invention is "arranged in the valve chamber" or "extends in the valve chamber in a direction orthogonal to the axial direction of the casing", all parts of the valve seat member are necessarily contained in the valve chamber. It does not mean that, for example, as in the tenth embodiment (FIGS. 27 to 28) described later, a structure in which a part (for example, an end portion) is arranged so as to protrude outside the valve chamber. Also included in the present invention.

Further, the number of urging members is not limited to one, and the urging member (first urging member) that urges the piston member downward as described above, for example, as in the first embodiment (second coil spring 15) described later. In addition to the urging member (referred to as), an urging member (referred to as a second urging member) that urges the piston member in the direction opposite to the urging member, that is, in the direction of movement of the piston member by the electric drive device, may be provided. good. However, in this case, each urging member is urged so that the urging force of the second urging member is smaller than the urging force of the first urging member so as not to interfere with the operation of the piston member by the first urging member. Set the power.

Further, the application of the drive valve according to the present invention may be various without particular limitation, and the "fluid" includes various liquids and gases (gas) in addition to heat media (refrigerant and heat medium).

According to the present invention, the manufacturing process of the electrically driven valve can be simplified to reduce the manufacturing cost, and the height of the electrically driven valve can be kept small.

Other objects, features and advantages of the present invention will be clarified by the following description of embodiments of the present invention described with reference to the drawings. In each figure, the same reference numerals indicate the same or corresponding parts.

FIG. 1 is a vertical cross-sectional view (cross-sectional view taken along the line BB in FIG. 2) showing an electrically driven valve (a state in which the three-way solenoid valve / solenoid is not energized) according to the first embodiment of the present invention. FIG. 2 is a vertical cross-sectional view (cross-sectional view taken along the line AA of FIG. 1) showing a three-way solenoid valve (state in which the solenoid is not energized) according to the first embodiment. FIG. 3 is a vertical cross-sectional view (A-A arrow cross-sectional view of FIG. 1) showing a three-way solenoid valve (a state in which the solenoid is energized) according to the first embodiment in the same manner as in FIG. FIG. 4 is a cross-sectional view (cross-sectional view taken along the line CC of FIG. 3) showing the three-way solenoid valve according to the first embodiment. FIG. 5 shows a first valve seat member (the second valve seat member also has the same shape as the first valve seat member) included in the three-way solenoid valve according to the first embodiment, and FIG. 5A shows the valve. A front view of the seat member, (b) is a plan view of the valve seat member, (c) is a vertical sectional view of the valve seat member (D1-D1 arrow cross section of (a)), and (d) is the valve seat. It is a vertical cross-sectional view of a member (the cross section taken by the DD arrow of (b)). FIG. 6 is a vertical cross-sectional view showing an electrically driven valve (a state in which the three-way solenoid valve / solenoid is not energized) according to the second embodiment of the present invention in the same manner as in FIG. FIG. 7 shows a first valve seat member (the second valve seat member also has the same shape as the first valve seat member) included in the three-way solenoid valve according to the second embodiment, and FIG. 7A shows the valve. Front view of the seat member, (b) is a plan view of the valve seat member, (c) is a vertical sectional view of the valve seat member (E1-E1 arrow cross section of (a)), (d) is the valve seat. It is a vertical sectional view of a member (the sectional view taken along the line EE of (b)). FIG. 8 is a vertical cross-sectional view showing an electrically driven valve (a state in which the three-way solenoid valve / solenoid is not energized) according to the third embodiment of the present invention in the same manner as in FIG. FIG. 9 shows a first valve seat member (the second valve seat member also has the same shape as the first valve seat member) included in the three-way solenoid valve according to the third embodiment, and FIG. 9A shows the valve. Front view of the seat member, (b) is a plan view of the valve seat member, (c) is a vertical sectional view of the valve seat member (F1-F1 arrow cross section of (a)), (d) is the valve seat. The right side view of the member, (e) is a vertical sectional view of the valve seat member (the FF arrow cross section of (b)). FIG. 10 is a vertical cross-sectional view (TH arrow cross-sectional view of FIG. 11) showing an electrically driven valve (a state in which the three-way solenoid valve / solenoid is not energized) according to the fourth embodiment of the present invention in the same manner as in FIG. ). FIG. 11 is a vertical sectional view (cross-sectional view taken along the line GG of FIG. 10) showing a three-way solenoid valve (state in which the solenoid is not energized) according to the fourth embodiment. FIG. 12 shows a first valve seat member (the second valve seat member also has the same shape as the first valve seat member) included in the three-way solenoid valve according to the fourth embodiment, and FIG. 12A shows the valve. A front view of the seat member, (b) is a plan view of the valve seat member, (c) is a vertical sectional view of the valve seat member (J1-J1 arrow cross section of (a)), and (d) is the valve seat. It is a vertical sectional view of a member (the JJ arrow sectional view of (b)). FIG. 13 is a vertical cross-sectional view (LL cross-sectional view of FIG. 14) showing an electrically driven valve (a state in which the three-way solenoid valve / solenoid is not energized) according to the fifth embodiment of the present invention. FIG. 14 is a vertical sectional view (cross-sectional view taken along the arrow KK of FIG. 13) showing a three-way solenoid valve (state in which the solenoid is not energized) according to the fifth embodiment. 15A and 15B show a valve seat member included in the three-way solenoid valve according to the fifth embodiment, where FIG. 15A is a front view of the valve seat member, FIG. 15B is a plan view of the valve seat member, and FIG. Is a vertical cross-sectional view of the valve seat member (M1-M1 arrow-viewing cross-sectional view of (a)), and (d) is a vertical cross-sectional view of the valve seat member (MM-arrow-viewing cross-sectional view of (b)). 16A and 16B show a partition plate included in the valve seat member of the three-way solenoid valve according to the fifth embodiment, FIG. 16A is a plan view of the partition plate, and FIG. 16B is a front view of the partition plate. FIG. 17 is a vertical cross-sectional view (P-P arrow cross-sectional view of FIG. 18) showing an electrically driven valve (a state in which the three-way solenoid valve / solenoid is not energized) according to the sixth embodiment of the present invention. FIG. 18 is a vertical cross-sectional view (NN arrow cross-sectional view of FIG. 17) showing a three-way solenoid valve (state in which the solenoid is not energized) according to the sixth embodiment. FIG. 19 shows a partition plate included in the valve seat member of the three-way solenoid valve according to the sixth embodiment, (a) is a front view of the partition plate, and (b) is a right side view of the partition plate. .. FIG. 20 is a vertical cross-sectional view (RR cross-sectional view of FIG. 21) showing an electrically driven valve (a state in which the two-way solenoid valve / solenoid is not energized) according to the seventh embodiment of the present invention. FIG. 21 is a vertical cross-sectional view (QQ arrow cross-sectional view of FIG. 20) showing a two-way solenoid valve (state in which the solenoid is not energized) according to the seventh embodiment. FIG. 22 is a cross-sectional view (cross-sectional view taken along the line SS of FIG. 21) showing the two-way solenoid valve according to the seventh embodiment. FIG. 23 is a vertical cross-sectional view showing the electrically driven valve (state in which the two-way solenoid valve / solenoid is not energized) according to the eighth embodiment of the present invention in the same manner as in FIG. FIG. 24 shows a valve seat member included in the two-way solenoid valve according to the eighth embodiment, (a) is a front view of the valve seat member, and (b) is a plan view of the valve seat member. c) is a vertical cross-sectional view of the valve seat member (T1-T1 arrow cross section of (a)), and (d) is a vertical cross-sectional view of the valve seat member (TT arrow view cross section of (b)). .. FIG. 25 is a vertical cross-sectional view showing an electrically driven valve (a state in which a two-way solenoid valve / solenoid is not energized) according to a ninth embodiment of the present invention in the same manner as in FIG. FIG. 26 shows a valve seat member included in the two-way solenoid valve according to the ninth embodiment, (a) is a front view of the valve seat member, and (b) is a plan view of the valve seat member. c) is a vertical sectional view of the valve seat member (U1-U1 arrow cross section of (a)), (d) is a right side view of the valve seat member, and (e) is a vertical sectional view of the valve seat member (e). (B) UU arrow cross section). FIG. 27 is a vertical cross-sectional view showing an electrically driven valve (a state in which the two-way solenoid valve / solenoid is not energized) according to the tenth embodiment of the present invention in the same manner as in FIG. 28 shows a valve seat member included in the two-way solenoid valve according to the tenth embodiment, where FIG. 28A is a front view of the valve seat member and FIG. 28B is a plan view of the valve seat member. c) is a vertical sectional view of the valve seat member (V1-V1 arrow cross section of (a)), (d) is a right side view of the valve seat member, and (e) is a vertical sectional view of the valve seat member (e). (B) VV arrow cross section). FIG. 29 is a vertical cross-sectional view (cross-sectional view taken along the line XX of FIG. 30) showing an electrically driven valve (a state in which the two-way solenoid valve / solenoid is not energized) according to the eleventh embodiment of the present invention. FIG. 30 is a vertical cross-sectional view (WW arrow cross section of FIG. 29) showing a two-way solenoid valve (state in which the solenoid is not energized) according to the eleventh embodiment. FIG. 31 is a cross-sectional view (cross-sectional view taken along the line YY in FIG. 30) showing the two-way solenoid valve according to the eleventh embodiment. FIG. 32 shows a valve seat member included in the two-way solenoid valve according to the eleventh embodiment, (a) is a front view of the valve seat member, and (b) is a plan view of the valve seat member. c) is a right side view of the valve seat member, (d) is a vertical sectional view of the valve seat member (ZZ arrow cross section of (b)), and (e) is a vertical sectional view of the valve seat member (e). (A) Z1-Z1 arrow cross section). FIG. 33 is a vertical cross-sectional view (ZB-ZB arrow cross-sectional view of FIG. 34) showing an electrically driven valve (a state in which the two-way solenoid valve / solenoid portion is not energized) according to the twelfth embodiment of the present invention. .. FIG. 34 is a vertical cross-sectional view (ZA-ZA arrow cross-sectional view of FIG. 33) showing a two-way solenoid valve (state in which the solenoid portion is not energized) according to the twelfth embodiment. FIG. 35 shows a valve seat member included in the two-way solenoid valve according to the twelfth embodiment, (a) is a front view of the valve seat member, and (b) is a bottom view of the valve seat member. c) is a vertical cross-sectional view of the valve seat member (ZC-ZC arrow cross-sectional view of (a)), and (d) is a vertical cross-sectional view of the valve seat member (ZD-ZD arrow-viewing cross section of (b)). ..

[First Embodiment]
As shown in FIGS. 1 to 5, in the electrically driven valve according to the first embodiment of the present invention, the fluid flowing into the valve chamber 12 through the inflow pipe 13 is introduced into the first outflow pipe 14 and the second outflow pipe 15. A three-way solenoid valve that selectively flows out from any one of them, a cylindrical casing 11 having a valve chamber 12 inside, a valve portion 31 for switching flow paths (outflow passages) 14 and 15, and a valve portion. It has a solenoid unit 21 that drives 31. It should be noted that each figure shows two-dimensional coordinates orthogonal to each other representing each direction of up / down, left / right, and front / back, and the following description will be given based on these directions (the same applies to each embodiment described later).

The solenoid portion 21 includes a coil 22, a suction element (fixed iron core) 23, a plunger (movable iron core) 24, and a valve body support portion (first valve body support portion 36 and a second valve) described below via the plunger 24. It has a first coil spring (urging member) 25 that urges the body support portion 37) downward. When power is supplied to the coil 22, the plunger 24 is attracted to the suction element 23 and moves upward in the casing 11 to cause the valve body supports 36, 37 (hence, the valve bodies 34, 35 fixed to them). Displaces upward (see FIG. 3).

The valve portion 31 includes two valve seat members (first valve seat member 32 and second valve seat member 33) and two valve bodies (two valve seat members 33) arranged in the valve chamber 12 formed in the lower internal space of the casing 11. The first valve body 34 and the second valve body 35) and the valve body support portion supporting these two valve bodies 34, 35 (the first valve body support portion 36 and the second valve body supporting the first valve body 34). A working rod interposed between the valve body support portions 36 and 37 so as to connect the second valve body support portion 37) that supports 35, the first valve body support portion 36, and the second valve body support portion 37. It has 38 and a second coil spring 17 that urges the second valve body support portion 37 upward.

The first valve body support portion 36 is provided integrally with the plunger 24 at the lower end portion of the plunger 24 so as to move up and down together with the plunger 24.

On the other hand, the second valve body support portion 37 is arranged below the second valve seat member 33, and two extending in the vertical direction between the second valve body support portion 37 and the first valve body support portion 36. It is installed so as to sandwich the operating rod 38 of. These actuating rods 38 are arranged so that the distance between the first valve body support portion 36 and the second valve body support portion 37 is constant, and in the present embodiment, the upper end of the actuating rod 38 is the first valve body. The second valve body support portion 37 fixed to the support portion 36 and urged upward by the second coil spring 17 is brought into contact with the lower end of the actuating rod 38.

The first valve body support portion 36 and the second valve body support portion 37 having the operating rod 38 interposed therebetween correspond to the piston member referred to in the present invention. Further, the structure for integrating the first valve body support portion 36 and the second valve body support portion 37 is the present invention as long as the first valve body support portion 36 and the second valve body support portion 37 move up and down integrally. Since it is possible to achieve the object, the structure is not limited to the structure shown in this embodiment (the same applies to the structure in which the plunger 24 and the valve body support portion 104 in the twelfth embodiment described later are integrated). ).

Further, the second coil spring 17 has the first valve body support portion 36 by bringing the second valve body support portion 37 into contact with the lower end of the operating rod 38 fixed to the first valve body support portion 36 as described above. And the second valve body support portion 37 moves up and down integrally while maintaining a certain interval, and also facilitates the upward movement of both valve body support portions 36 and 37 when the coil 22 is energized. However, the spring load of the second coil spring 17 is smaller than the spring load of the first coil spring 25 so as not to hinder the downward urging of the valve body support portions 36 and 37 by the first coil spring 25. Set to be.

Both the first valve seat member 32 and the second valve seat member 33 are metal pipe members (made of stainless steel in each embodiment of the present application) having a linear cylindrical shape with openings at both ends, and the casing 11 is formed. When placed horizontally in the casing 11 so as to cross (extend in the direction orthogonal to the axis A1 of the casing), there is no gap on the inner peripheral surface of the casing 11 (the left inner peripheral surface and the right inner peripheral surface of the casing 11). Both end faces 43, 44 (45, 46) are formed into a curved shape that matches the inner peripheral surface of the casing 11 so as to abut.

Further, on the upper peripheral wall of the central portion of the first valve seat member 32 in the length direction, a first valve seat 41 on which the first valve body 34 can be seated is formed including the first valve port 41a opened upward. On the lower peripheral wall of the central portion in the length direction of the second valve seat member 33, a second valve seat 42 on which the second valve body 35 can be seated is formed including the second valve port 42a opened downward. .. The valve seat member having such a shape can be efficiently manufactured in a short time by press working (for example, bulge forming or drawing) without cutting (each embodiment after the second embodiment). The same applies to the valve seat member of the form).

The first valve seat member 32 and the second valve seat member 33 have the same shape, but the second valve seat member 33 is in a state where the first valve seat member 32 is turned upside down, and is directly below the first valve seat member 32. The second valve seat member 33 is arranged in the valve chamber 12 (casing 11) so that both valve seat members 32 and 33 are vertically stacked in parallel with each other. Further, both of these valve seat members 32 and 33 are horizontally (horizontally / in other words, radially) inside the casing 11 so as to horizontally cross the central axis A1 of the cylindrical casing 11 extending in the vertical direction. ), And installed so as to be bridged between the inner peripheral surfaces (the inner peripheral surface on the left side and the inner peripheral surface on the right side) facing each other with the central axis A1 of the casing 11 interposed therebetween.

Both end faces 43 to 46 of the valve seat members 32, 33 are fixed by brazing to the inner peripheral surface of the casing 11, thereby preventing fluid from leaking from the ends of the valve seat members 32, 33.

Further, the first outflow pipe 14 is connected to one end (left end) of the first valve seat member 32 by penetrating the left peripheral wall of the casing 11, and similarly, one end (right end) of the second valve seat member 33. ), The second outflow pipe 15 is connected by penetrating the right peripheral wall of the casing 11. Further, as indicated by reference numeral 18, the outflow pipes 14 and 15 (the same applies to the inflow pipe 13 described later) are fixed by brazing to the outer peripheral surface of the casing 11 (for each embodiment after the second embodiment). The same applies). In this embodiment and other embodiments described later, one end or both ends of the valve seat member may be brazed to the inner peripheral surface of the casing 11, but these brazed metals are not shown.

A space (gap) is formed between the inner peripheral surface of the casing 11 on both sides (front side and rear side) of the valve seat members 32 and 33 (see FIGS. 2 to 4), and the valve chamber 12 passes through this space. The upper part and the lower part of the are in communication with each other. Further, the operating rod 38 passes vertically through these spaces (gap).

The inflow pipe 13 for flowing the fluid into the valve chamber 12 is connected to the front side of the casing 11, whereby the fluid flows into the space on the side of the valve seat member. Further, although the bottom surface of the casing 11 is an opening, a lower lid 16 is provided to close the bottom surface opening. Further, the second coil spring 17 is arranged between the lower lid 16 and the second valve body support portion 37.

The operation of the drive valve of this embodiment is as follows.

When the coil 22 is not energized, as shown in FIGS. 1 and 2, the plunger 24 and the valve body support portions 36 and 37 are pressed downward by the urging force of the first coil spring 25 to support the first valve body. The first valve body 34 fixed to the lower surface of the portion 36 sits on the first valve seat 41 on the upper surface of the first valve seat member 32 to close the first valve opening 41a, and the upper surface of the second valve body support portion 37. The second valve body 35 fixed to the second valve seat member 33 is separated downward from the second valve seat 42 on the lower surface of the second valve seat member 33 to open the second valve opening 42a. As a result, the fluid that has flowed into the valve chamber 12 through the inflow pipe 13 enters the inside of the second valve seat member 33 from the second valve port 42a of the second valve seat 42, and passes through the second outflow pipe 15 to valve. It is discharged to the outside.

On the other hand, when the coil 22 is energized, as shown in FIG. 3, the suction element 23 attracts the plunger 24 against the urging force of the first coil spring 25, and the valve body support portions 36 and 37 move upward. do. Along with this, the first valve body 34 fixed to the lower surface of the first valve body support portion 36 moves upward and leaves the first valve seat 41 on the upper surface of the first valve seat member 32 to leave the first valve opening 41a. The second valve body 35 fixed to the upper surface of the second valve body support portion 37 sits on the second valve seat 42 on the lower surface of the second valve seat member 33 and closes the second valve opening 42a. As a result, the fluid that has flowed into the valve chamber 12 through the inflow pipe 13 enters the inside of the first valve seat member 32 from the first valve port 41a of the first valve seat 41, and passes through the first outflow pipe 14 to valve. It is discharged to the outside. In this way, the flow path can be switched between the first outflow pipe 14 and the second outflow pipe 15.

In the drive valve of the present embodiment, by using the pipe member as described above, cutting work becomes unnecessary at the time of manufacturing the valve seat members 32 and 33. Therefore, it is possible to simplify the manufacture of the valve seat members 32 and 33, improve the manufacturing efficiency of the drive valve, and reduce the manufacturing cost. Further, since all the pipes (inflow pipe 13 and outflow pipes 14, 15) connected to the drive valve can be connected horizontally to the casing 11, the height h of the drive valve (see FIG. 1) can be reduced. It can be suppressed, and the fluid pipe can be routed horizontally to form a fluid circuit (for example, a refrigerant circuit) horizontally thin (lower in height).

[Second Embodiment]
As shown in FIGS. 6 to 7, the drive valve according to the second embodiment of the present invention has a cylindrical casing 11 and a valve portion 31 for switching the flow path, similarly to the drive valve of the first embodiment. A three-way solenoid valve having a solenoid portion 21 for driving the valve portion 31, which includes two valve seat members 51 and 52 made of a pipe member, wherein the structure of the valve seat members 51 and 52 is the first embodiment. It is different from the morphology. In the following description, the same components as those in the first embodiment are designated by the same reference numerals, duplicated description will be omitted, and the differences will be mainly described (the same applies to the third and subsequent embodiments). ..

In the present embodiment, both of the valve seat members (first valve seat member 51 and second valve seat member 52) provided in the valve chamber 12 have a sack shape (or cap) in which one end is open and the other ends 53 and 54 are closed. Shape) pipe member. Then, the first outflow pipe 14 is connected to one end (left end) of the first valve seat member 51, and the second outflow pipe 15 is connected to one end (right end) of the second valve seat member 52.

Further, both the valve seat members 51 and 52 are arranged in the casing 11 (valve chamber 12) so as to be vertically overlapped with each other as in the first embodiment, and the other end (right end) 53 of the first valve seat member 51 is arranged. The other end (left end) 54 of the second valve seat member 52 is in contact with the inner peripheral surface on the right side of the casing 11, and is in contact with the inner peripheral surface on the left side of the casing 11. Further, the first valve seat 41 (first valve port 41a) is on the upper peripheral wall of the first valve seat member 51, and the second valve seat 42 (second valve port 42a) is on the lower peripheral wall of the second valve seat member 52. ) Are provided respectively.

The structure of the valve portion 31 other than the valve seat members 51 and 52, for example, the first valve body support portion 36 provided with the first valve body 34 and the second valve body support portion 37 provided with the second valve body 35. By interposing an operating rod (not shown), they are integrated at regular intervals, and these are integrally moved up and down by the solenoid unit 21 to the outflow passage (first outflow pipe 14 and second outflow pipe). The structure and the like in which the switching of 15) is performed are the same as those in the first embodiment (the same applies to the third to sixth embodiments relating to the three-way valve described later).

According to the present embodiment, it is possible to omit the work of closing the other ends of the valve seat members 51 and 52 by brazing or the like, and it is possible to more reliably prevent the fluid from leaking from the other ends 53 and 54. It will be possible.

[Third Embodiment]
As shown in FIGS. 8 to 9, the drive valve according to the third embodiment of the present invention includes a cylindrical casing 11, a valve portion 31 for switching a flow path, and a solenoid portion 21 for driving the valve portion 31. The three-way solenoid valve has valve seat members 61, 62 made of a sack-shaped pipe member whose one end is open and the other end is closed, as in the second embodiment. The shape of is different.

Specifically, as shown in an enlarged manner in FIG. 9, a cylindrical outflow pipe connection capable of inserting and connecting the first outflow pipe 14 to one end (left end) of the first valve seat member 61. While the portion 63 is provided, the central portion and the other end portion (right end portion) 65 in the length direction are a low back portion 64 in which the lower peripheral wall located below the first valve seat 41 is crushed upward and flattened.

Further, the second valve seat member 62 has the same shape as the first valve seat member 61, but is parallel to and parallel to the first valve seat member 61 directly under the first valve seat member 61 in a state where the second valve seat member 62 is turned upside down and left and right. It is arranged horizontally in the valve chamber 12. Speaking based on this arrangement state, the second valve seat member 62 has a cylindrical outflow pipe connecting portion 63 to which the second outflow pipe 15 can be inserted and connected to one end (right end) thereof. On the other hand, the central portion and the other end portion (left end portion) in the length direction are formed into a flat shape by crushing the upper peripheral wall located above the second valve seat 42 downward to form the first valve seat member 61. The low back portion 64 similar to the above is formed.

Then, the low back portions 64 of both valve seat members 61 and 62 are stacked one above the other, that is, the flat lower peripheral wall (low back portion 64) of the first valve seat member 61 and the flat upper side of the second valve seat member 62. Both valve seat members 61 and 62 are installed in the valve chamber 12 so as to overlap with the peripheral wall (low back portion 64).

According to the present embodiment, it is possible to omit the work of closing the other end 65 of the valve seat members 61 and 62 as in the second embodiment, and more reliably prevent the fluid from leaking from the other end 65. In addition to being able to do this, it is possible to keep the height lower than that of the drive valve of the second embodiment because the structure is such that the low back portions 64 are formed and the low back portions 64 are overlapped with each other.

[Fourth Embodiment]
As shown in FIGS. 10 to 12, the drive valve according to the fourth embodiment of the present invention includes a cylindrical casing 11, a valve portion 31 for switching a flow path, and a solenoid portion 21 for driving the valve portion 31. It is a three-way solenoid valve having a valve seat, which is provided with a valve seat member (first valve seat member 71 and second valve seat member 72) made of a pipe member whose both ends are open as in the first embodiment. The shapes of the members 71 and 72 are different.

Specifically, as shown in an enlarged manner in FIG. 12, a flat recess 73 is formed in the central portion of the valve seat members 71 and 72 in the length direction, and the valve seat (first valve) is formed in the recess 73. A seat 41 and a second valve seat 42) were provided. The first valve seat member 71 and the second valve seat member 72 have the same shape, but the second valve seat member 72 is in a state where the first valve seat member 71 is turned upside down. Then, these valve seat members 71 and 72 are installed in the valve chamber 12 in the same manner as the valve seat members 32 and 33 of the first embodiment.

According to the present embodiment, the recess 73 of the first valve seat member 71 is recessed downward, and the recess 73 of the second valve seat member 72 is recessed upward, so that the height is higher than that of the drive valve of the first embodiment. It can be kept low.

[Fifth Embodiment]
As shown in FIGS. 13 to 16, the drive valve according to the fifth embodiment of the present invention has a cylindrical casing 11, a valve portion 31 for switching a flow path, and a valve portion 31, as in each of the above-described embodiments. It is a three-way solenoid valve having a solenoid unit 21 for driving the above-mentioned, but unlike each of the above-described embodiments, it is provided with one valve seat member 81.

Specifically, the valve seat member 81 is a linear pipe member having both ends open like the valve seat members 32 and 33 of the first embodiment, but valves are applied to both the upper peripheral wall and the lower peripheral wall. The valve seats 41 and 42 including the openings 41a and 42a, that is, the first valve seat 41 including the first valve port 41a on the upper peripheral wall and the second valve seat 42 including the second valve port 42a on the lower peripheral wall. Each is formed. Further, the first outflow pipe 14 is connected to one end (left end) of the valve seat member 81 (the portion is referred to as the first outflow pipe connection portion), and the second outflow pipe is connected to the other end (right end). 15 is connected (the relevant portion is referred to as a second outflow pipe connection portion).

Further, in order to combine the valve seat members into one, in the present embodiment, the internal space of the valve seat member 81 is divided into two chambers, that is, the first valve including the first outflow pipe connection portion and the first valve seat 41. A partition plate 82 for dividing the seat chamber 83 into a second valve seat chamber 84 including the second outflow pipe connecting portion and the second valve seat 42 is provided. When the partition plate 82 is diagonally installed at the center position in the length direction inside the valve seat member 81, the entire circumference of the partition plate 82 comes into contact with the inner peripheral surface of the valve seat member 81 to partition the inside of the valve seat member 81. As described above, it is a metal plate having an elliptical planar shape (see FIG. 16).

The flow path switching operation is the same as in each of the above-described embodiments, and when the coil 22 is not energized (states shown in FIGS. 13 to 14), the valve body support portion 36 is driven by the urging force of the first coil spring 25. , 37 is pressed downward, the first valve body 34 is seated on the first valve seat 41 to close the first valve port 41a, and the second valve body 35 is separated from the second valve seat 42 to be second. The valve opening 42a is opened. As a result, the fluid that has flowed into the valve chamber 12 through the inflow pipe 13 flows into the second valve seat chamber 84 from the second valve port 42a and is discharged to the outside of the valve through the second outflow pipe 15.

On the other hand, when the coil 22 is energized, the suction element 23 attracts the plunger 24 and moves the valve body support portions 36 and 37 upward. As a result, the first valve body 34 separates from the first valve seat 41 to open the first valve port 41a, and the second valve body 35 sits on the second valve seat 42 to close the second valve port 42a. .. Therefore, the fluid in the valve chamber 12 flows into the first valve seat chamber 83 from the first valve port 41a and is discharged to the outside of the valve through the first outflow pipe 14.

According to the present embodiment, since only one valve seat member is required, the height can be further suppressed as compared with the drive valve of each of the above-described embodiments. Further, the valve seat member can be composed of one member, and the number of parts can be reduced.

Further, the fluid flowing into the valve seat member 81 (the fluid flowing downward from the first valve seat 41 into the valve seat member 81 and the fluid flowing upward from the second valve seat 42 into the valve seat member 81) is oblique. Since it is easy to change the direction of the flow from the vertical direction to the horizontal direction by hitting the partition plate 82, the fluid flowing into the valve chamber 12 through the inflow pipe 13 can be smoothly discharged to the outside of the valve through the outflow pipes 14 and 15. ..

Further, when the first outflow pipe 14 and the second outflow pipe 15 are connected to the valve seat member 81, the outflow pipes 14 and 15 are abutted against each end of the diagonally installed partition plate 82 for positioning. This is possible, and stable work can be performed when the outflow pipes 14 and 15 are brazed and fixed to the casing 11, respectively.

[Sixth Embodiment]
As shown in FIGS. 17 to 19, the drive valve according to the sixth embodiment of the present invention has one valve seat member as in the fifth embodiment, but the inside of the valve seat member 91. The shape of the partition plate 92 for partitioning is different. The portion other than the partition plate 92 is the same as the valve seat member 81 of the fifth embodiment.

Specifically, the partition plate 92 divides the internal space of the valve seat member 91 in the central portion in the length direction (in other words, the lower space of the first valve seat 41 and the upper space of the second valve seat 42) into upper and lower parts. The horizontal plate portion 93 that spreads horizontally, the first vertical plate portion 94 that rises upward from the right end of the horizontal plate portion 93 and defines the first valve seat chamber 83, and the horizontal plate portion 93 from the left end to the bottom. It is composed of a second vertical plate portion 95 that stands down and defines the second valve seat chamber 84.

Also in the present embodiment provided with the valve seat member 91 having such a partition plate 92, the flow path can be switched by the same operation as the drive valve of the fifth embodiment. In addition, the height of the drive valve can be reduced and the number of parts can be reduced. Further, since the outflow pipes 14 and 15 can be positioned by abutting the first outflow pipe 14 against the second vertical plate portion 95 and the second outflow pipe 15 against the first vertical plate portion 94, respectively, the outflow pipes can be positioned. Workability when connecting 14 and 15 is also good.

[7th Embodiment]
As shown in FIGS. 20 to 22, the drive valve according to the seventh embodiment of the present invention is a two-way solenoid valve that opens and closes (opens and shuts off) the flow path, and has a cylindrical shape having a valve chamber 12 inside. It has a casing 11, a valve portion 31 that opens and closes a flow path, and a solenoid portion 21 that drives the valve portion 31. The two-way valve of the present embodiment (the same applies to the eighth to eleventh embodiments described later) is opened only during operation (when the solenoid unit 21 is energized) as is clear from the operation description described later. It is a normally closed two-way valve that is closed when it is not operating (when the solenoid unit 21 is not energized).

The solenoid portion 21 is a coil spring that downwardly urges a coil 22, a suction element (fixed iron core) 23, a plunger (movable iron core) 24, and a valve body support portion (described later) 104 integrated with the plunger 24. (Biasing member) 25.

The valve portion 31 includes a valve seat member 101 having a valve seat 102 and arranged in the valve chamber 12, a valve body 103 that moves forward and backward with respect to the valve seat 102, and a valve body support portion 104 that supports the valve body 103. To prepare for. The valve seat member 101 is made of a pipe member having the same shape as the first valve seat member 71 of the fourth embodiment (FIG. 12). That is, it is a linear pipe member with both ends open, and a valve seat 102 having a valve port 102a is provided on the upper peripheral wall. Further, the outflow pipe 114 for flowing the fluid from the valve chamber 12 is connected to one end (left end), and the other end (right end) is closed by brazing to the inner peripheral surface of the casing 11. The outflow pipe 114 penetrates the left peripheral wall of the casing 11 and is connected to one end of the valve seat member 101 and is brazed and fixed to the outer peripheral surface of the casing 11.

The valve body support portion 104 that supports the valve body 103 is provided integrally with the plunger 24 at the lower end portion of the plunger 24, similarly to the first valve body support portion 36 of each embodiment according to the three-way solenoid valve. Further, an inflow pipe 13 for allowing a fluid to flow into the valve chamber 12 is fixed to the front peripheral wall of the casing 11 (see FIG. 21).

In the drive valve of the present embodiment, the flow path can be opened and closed as follows.

When the coil 22 is not energized, as shown in FIGS. 20 and 21, the valve body support portion 104 is pressed downward by the urging force of the coil spring 25, and the valve body 103 is seated on the valve seat 102 to valve. The mouth 102a is closed. As a result, the inflow pipe 13 and the outflow pipe 114 do not communicate with each other, and the flow path is cut off.

On the other hand, when the coil 22 is energized, the suction element 23 attracts the plunger 24, and the valve body 103 fixed to the valve body support portion 104 moves upward. As a result, the valve port 102a is opened, and the fluid flowing into the valve chamber 12 through the inflow pipe 13 enters the inside of the valve seat member 101 from the valve port 102a and is discharged to the outside of the valve through the outflow pipe 114.

The drive valve of the present embodiment does not require cutting to manufacture the valve seat member 101 as in each of the above-described embodiments, and the valve seat member 101 can be easily manufactured to improve the manufacturing efficiency of the drive valve. The cost can be reduced. Further, conventionally, the outflow pipe 114 (or the inflow pipe 13) may be connected so as to extend downward from the bottom surface (lower surface) of the casing 11, but according to the present embodiment, the inflow pipe 13 and the outflow pipe 114 are connected. Since both are horizontally connected to the casing 11, the fluid circuit can be horizontally thin (low in height).

[Eighth Embodiment]
As shown in FIGS. 23 to 24, the drive valve according to the eighth embodiment of the present invention is a two-way solenoid valve that opens and closes the flow path in the same manner as in the seventh embodiment (FIGS. 20 to 22). It has a cylindrical casing 11, a valve portion 31 for opening and closing the flow path, and a solenoid portion 21 for driving the valve portion 31, but the shape of the valve seat member 121 is different.

That is, the valve seat member 121 has the same shape as the first valve seat member 51 (FIG. 7) of the second embodiment, which is made of a pipe member having one end open and the other end closed. However, the length is shorter than that of the first valve seat member 51 of the embodiment, and the length dimension is shorter than the inner diameter of the casing 11. The upper peripheral wall of the valve seat member 121 is provided with a valve seat 102 similar to that of the seventh embodiment.

Therefore, when the valve seat member 121 is installed so as to abut on the inner peripheral surface on the left side of the casing 11 while connecting the outflow pipe 114 as in the case of the first valve seat member 51 of the second embodiment (FIG. 6) (casing 11). The left end surface of the valve seat member 121 is brazed and fixed to the left inner peripheral surface of the casing 11), and a space (gap) S is formed between the right inner peripheral surface of the casing 11 and the tip end (right end) of the valve seat member 121. .. Therefore, in the present embodiment, the inflow pipe 13 is connected to the right peripheral wall of the casing 11 so as to face the outflow pipe 114 (the tip of the valve seat member 121), and the fluid flows into the valve chamber 12 through the space S. Is possible. Since the valve opening / closing operation is the same as that of the seventh embodiment, the description thereof will be omitted.

[9th Embodiment]
As shown in FIGS. 25 to 26, the drive valve according to the ninth embodiment of the present invention is a two-way solenoid valve that opens and closes the flow path, and is the same as the eighth embodiment (FIGS. 23 to 24). A valve seat member 131 comprising a cylindrical casing 11, a valve portion 31 for opening and closing the flow path, and a solenoid portion 21 for driving the valve portion 31, with one end open and the other end closed. However, the shape of the other end side (closed end side) of the valve seat member 131 is different.

That is, the valve seat member 131 projects horizontally (to the right) toward the other end (right end) of the closure, and the inflow pipe 13 projects from the inner peripheral surface of the casing 11 into the valve chamber 12. It is provided with a protruding portion 132 that abuts on the lower end portion of the left end). Then, the protruding portion 132 is brazed to the lower end of the tip of the inflow pipe 13. The left end of the valve seat member 131 is brazed to the inner peripheral surface of the casing 11 as in the eighth embodiment.

According to the present embodiment, since the left and right ends of the valve seat member 131 are fixed as in the seventh embodiment, the support strength of the valve seat member 131 can be increased. Moreover, it is possible to more reliably prevent the leakage of the fluid from the other end (right end) of the valve seat member 131 as compared with the seventh embodiment. The height of the protruding portion 132 is about half the diameter of the inflow pipe 13, and even if the protruding portion 132 is fixed to the tip of the inflow pipe 13, the inflow of fluid through the inflow pipe 13 is hindered. There is no such thing.

[10th Embodiment]
As shown in FIGS. 27 to 28, the drive valve according to the tenth embodiment of the present invention is a two-way solenoid valve that opens and closes the flow path, and is the same as the eighth embodiment (FIGS. 23 to 24). A valve seat member 141 comprising a cylindrical casing 11, a valve portion 31 for opening and closing the flow path, and a solenoid portion 21 for driving the valve portion 31, with one end open and the other end closed. Although it is provided, a flange portion 142 that can be fixed to the outer peripheral surface of the casing 11 is provided at one end of the valve seat member 141.

The flange portion 142 projects outward (in a direction away from the central axis with respect to the radial direction of the valve seat member 141) at one end (left end) connecting the outflow pipe 114, and is formed in the peripheral wall of the casing 11. When the valve seat member 141 is inserted into the casing 11 from the outside, it comes into contact with the outer peripheral surface of the casing 11 around the opening.

Therefore, in the present embodiment, unlike other embodiments (in embodiments other than the present embodiment, the valve seat member is inserted from the upper surface or the lower surface of the casing 11 and installed in the casing 11), and the valve seat member is installed from the side surface of the casing 11. The valve seat member 141 is installed in the casing 11 so that the 141 is inserted into the opening. Then, one end (left end) of the valve seat member 141 is brazed to the inner peripheral surface of the casing 11 to fix it, and after the outflow pipe 114 is inserted into the valve seat member 141, the flange portion 142 and the outflow pipe 114 Is brazed (see reference numeral 18) to connect the outflow pipe 114 and the valve seat member 141.

In the present embodiment, the valve seat member 114 is supported only at one end and has a cantilever-like support, but the support strength can be increased by providing the flange portion 142. Further, in the present embodiment, since the casing 11 has a bottomless structure (the bottom surface 11a is closed), it is possible to save the trouble of attaching the lower lid and to prevent the fluid from leaking from the bottom surface of the casing 11. There is also the advantage that it can be prevented more reliably.

[11th Embodiment]
As shown in FIGS. 29 to 32, the drive valve according to the eleventh embodiment of the present invention is a two-way solenoid valve that opens and closes the flow path, and is the same as the seventh embodiment (FIGS. 20 to 22). A valve seat member 151 including a cylindrical casing 11, a valve portion 31 for opening and closing the flow path, a solenoid portion 21 for driving the valve portion 31, and a linear pipe member having both ends open. However, a bulging portion 152 that swells downward is formed at the central portion in the length direction of the valve seat member 151. The casing 11 is a tubular member having a bottom 11a (the bottom surface is closed) as in the tenth embodiment, and the valve seat member 151 is provided so that the bulging portion 152 abuts on the bottom 11a of the casing 11. Install.

Further, an outflow pipe 114 is connected to one end (left end) of the valve seat member 151 and brazed to the inner peripheral surface of the casing 11. The other end (right end) of the valve seat member 151 may be brazed to the inner peripheral surface of the casing 11 to close the opening.

According to the present embodiment, both ends of the valve seat member 151 are supported by the peripheral wall of the casing 11, and the intermediate portion, that is, directly below the valve seat 102 that receives a force from the valve body 103 when the valve is closed, abuts on the bottom 11a of the casing 11. Since it is supported by the bulging portion 152, the valve seat member 151 can be more stably and firmly arranged in the valve chamber 12.

[12th Embodiment]
As shown in FIGS. 33 to 35, the drive valve according to the twelfth embodiment of the present invention has a cylindrical casing 11 having a valve chamber 12 inside, a valve portion 31 for opening and closing a flow path, and a valve portion. It is a two-way solenoid valve having a solenoid portion 21 for driving the 31. However, contrary to the drive valve of the seventh to eleventh embodiments described above, the valve is closed only during operation (when the solenoid portion 21 is energized). However, it is a normally open type two-way valve that is in the valve open state when it is not operating (when the solenoid unit 21 is not energized).

The valve portion 31 has a valve seat member 161 provided with a valve seat 102 and arranged in the valve chamber 12, a valve body 103 that moves forward and backward with respect to the valve seat 102, and a valve body arranged below the valve seat member 161. It has a valve body support portion 104 that supports 103.

The valve seat member 161 is made of a pipe member having the same shape as the second valve seat member 33 of the first embodiment (FIGS. 1 to 5). That is, the valve seat member 161 is a linear pipe member with both ends open, and the valve seat 102 having the valve port 102a is provided on the lower peripheral wall. Further, an outflow pipe 114 for flowing fluid from the valve chamber 12 is connected to one end (right end) of the valve seat member 161 and the other end (left end) is brazed to the inner peripheral surface of the casing 11 to close the valve seat member 161. The outflow pipe 114 penetrates the right peripheral wall of the casing 11 and is connected to one end of the valve seat member 161 and is brazed and fixed to the outer peripheral surface of the casing 11. The inflow pipe 13 for flowing the fluid into the valve chamber 12 is fixed to the front peripheral wall of the casing 11 (see FIG. 34).

The valve body support portion 104 that supports the valve body 103 has the second valve body support portion 37 integrated with the first valve body support portion 36 with the actuating rod 38 interposed therebetween in the same manner as in the first embodiment. It is integrated with the plunger 24 via the actuating rod 38 (see FIG. 34). Specifically, the valve body support portion 104 is arranged below the valve seat member 161 and installed so as to sandwich two actuating rods 38 extending in the vertical direction between the valve body support portion 104 and the plunger 24. .. Here, the upper end of the working rod 38 is fixed to the lower surface of the plunger 24, and the valve body support portion 104 urged upward by the second coil spring 17 is brought into contact with the lower end of the working rod 38. In the present embodiment, the valve body support portion 104 corresponds to the piston member referred to in the present invention (second invention).

Further, the spring load of the second coil spring 17 is made smaller than the spring load of the first coil spring 25 so as not to hinder the downward urging of the valve body support portion 104 by the first coil spring 25. It is the same as the embodiment and the like.

The operation of the drive valve according to this embodiment is as follows.

When the coil 22 is not energized, as shown in FIGS. 33 and 34, the valve body support portion 104 is pressed downward by the urging force of the coil spring 25, and the valve body 103 is separated downward from the valve seat 102. The valve opening 102a is in an open state. Therefore, the fluid that has flowed into the valve chamber 12 through the inflow pipe 13 enters the inside of the valve seat member 161 from the valve port 102a and is discharged to the outside of the valve through the outflow pipe 114.

On the other hand, when the coil 22 is energized, the suction element 23 attracts the plunger 24, and the valve body 103 fixed to the valve body support portion 104 moves upward. As a result, the valve body 103 is seated on the valve seat 102 to close the valve port 102a, and the flow path between the inflow pipe 13 and the outflow pipe 114 is blocked.

In the present embodiment, a pipe member having both ends open is used as the valve seat member 161. However, as in the eighth embodiment (FIGS. 23 to 24), one end is opened and the other end is closed. A pipe member (valve seat member 121) may be used. However, in this case, the valve seat member 121 shown in the eighth embodiment is installed in a state of being turned upside down so that the valve seat 102 is arranged on the lower side (the same applies hereinafter).

Further, as in the ninth embodiment (FIGS. 25 to 26), it is also possible to adopt a valve seat member 131 having a protruding portion 132 at the closed end portion. In this case, the protruding portion may be brazed to the inner peripheral surface of the casing 11 (inner surface of the left peripheral wall), or the inflow pipe 13 may be connected to the left peripheral wall of the casing to connect the inflow pipe 13 to the left peripheral wall of the casing and the inflow pipe as in the ninth embodiment. A protrusion may be brazed to the tip of 13.

Further, as in the tenth embodiment (FIGS. 27 to 28), it is also possible to use the pipe member (valve seat member 141) provided with the flange portion 142 in a state of being turned upside down.

Although the embodiments of the present invention have been described above, it is clear to those skilled in the art that the present invention is not limited to these embodiments and various modifications can be made within the scope of the claims. Is.

For example, in each of the above embodiments, the shape of the valve seat member is a cylinder, but a polygonal tubular member such as a square cylinder or a hexagonal cylinder can be used instead. Further, the drive valve of the seventh to twelfth embodiments relating to the two-way valve is used so that the flow of the fluid is reversed, that is, the fluid flows in from the outflow pipe 114 and flows out from the inflow pipe 13. It can also be used to make it work.

11 Casing 12 Valve chamber 13 Inflow pipe 14 First outflow pipe 15 Second outflow pipe 16 Lower lid 17 Second coil spring 18 Brazing (brazing metal)
21 Solenoid part 22 Coil 23 Attractor (fixed iron core)
24 Plunger (movable iron core)
25 Coil spring (first coil spring)
31 Valve part 32,51,61,71 First valve seat member 33,52,62,72 Second valve seat member 34 First valve body 35 Second valve body 36 First valve body support part 37 Second valve body support Part 38 Acting rod 41 First valve seat 41a First valve port 42 Second valve seat 42a Second valve port 43,44,45,46,53,54,65 End face (end) of valve seat member
63 Outflow pipe connection part 64 Low back part 73 Depression 81, 91, 101, 111, 121, 131, 141, 151, 161 Valve seat member 82, 92 Partition plate 83 First valve seat room 84 Second valve seat room 93 Horizontal Plate part 94 First vertical plate part 95 Second vertical plate part 102 Valve seat 102a Valve opening 103 Valve body 104 Valve body support part 114 Outflow pipe 132 Protruding part 142 Flange part 152 Swelling part

Claims (18)

A cylindrical casing with a valve chamber inside,
An inflow pipe that allows fluid to flow into the valve chamber,
The first outflow pipe that allows the fluid to flow out of the valve chamber,
A second outflow pipe that allows the fluid to flow out of the valve chamber,
A first valve seat member provided with a first valve seat and arranged in the valve chamber so as to communicate with the first outflow pipe, and a first valve seat member.
A second valve seat member provided with a second valve seat and arranged in the valve chamber so as to communicate with the second outflow pipe.
A piston member having a first valve body and a second valve body and arranged in the casing so as to be movable in the axial direction of the casing.
When the axial direction of the casing is the vertical direction, the urging member that urges the piston member downward and the urging member.
It is provided with an electric drive device that moves the piston member upward against the urging force of the urging member.
The first valve body is in a valve closed state in which the first valve seat is seated to prevent the fluid from flowing out through the first outflow pipe, and the first valve seat is separated from the first valve seat and through the first outflow pipe. It is possible to move forward and backward with respect to the first valve seat with the valve open state that allows the outflow of the fluid.
The second valve body is in a valve closed state in which the second valve seat is seated to prevent the fluid from flowing out through the second outflow pipe, and the second valve seat is separated from the second valve seat and through the second outflow pipe. It is possible to move forward and backward with respect to the second valve seat with the valve open state that allows the outflow of the fluid.
When the piston member is displaced downward due to the urging force of the urging member, the first valve body is seated on the first valve seat and the second valve body is separated from the second valve seat. (Ii) While the fluid is discharged from the valve chamber through the outflow pipe, the second valve body is seated on the second valve seat and the first valve is seated when the piston member is displaced upward by the electric drive device. An electrically driven valve that allows the fluid to flow out of the valve chamber through the first outflow pipe by separating the body from the first valve seat.
The first valve seat member is a pipe member extending in a direction orthogonal to the axial direction of the casing in the valve chamber and having the first valve seat formed on the upper peripheral wall.
The second valve seat member is an electrical pipe member extending in a direction orthogonal to the axial direction of the casing in the valve chamber and having the second valve seat formed on the lower peripheral wall. Drive valve. The first valve seat member and the second valve seat member are both pipe members with both ends open.
The first outflow pipe is connected to one end of the first valve seat member.
The other end of the first valve seat member is closed by brazing to the inner peripheral surface of the casing.
The second outflow pipe is connected to one end of the second valve seat member.
The electrically driven valve according to claim 1, wherein the other end of the second valve seat member is closed by brazing to the inner peripheral surface of the casing. The first valve seat member has a recess that is recessed downward on the upper peripheral surface.
The first valve seat is provided in the recess of the first valve seat member.
The second valve seat member has a recess that is recessed upward on the lower peripheral surface.
The electrically driven valve according to claim 2, wherein the second valve seat is provided in a recess of the second valve seat member. Both the first valve seat member and the second valve seat member are pipe members whose one end is open and the other end is closed.
The first outflow pipe is connected to the one end of the first valve seat member, and the first outflow pipe is connected.
The electrically driven valve according to claim 1, wherein the second outflow pipe is connected to the one end of the second valve seat member. The electrically driven valve according to any one of claims 1 to 4, wherein the first valve seat member and the second valve seat member are arranged in the valve chamber so as to be stacked vertically. Both the first valve seat member and the second valve seat member are pipe members whose one end is open and the other end is closed.
The first valve seat member is
A first outflow pipe connecting portion for connecting the first outflow pipe is provided on the open one end side, and the first outflow pipe is connected to the first outflow pipe.
The lower peripheral wall of the other end of the first outflow pipe connection portion is flat so that the vertical dimension is smaller than that of the first outflow pipe connection portion, and the lower peripheral wall is the first outflow pipe. The low back is formed so that it is located above the lower end of the connection.
The second valve seat member is
A second outflow pipe connecting portion for connecting the second outflow pipe is provided on the opened one end side, and the second outflow pipe is connected to the second outflow pipe.
The upper peripheral wall of the other end side of the second outflow pipe connection portion is flat so that the vertical dimension is smaller than that of the second outflow pipe connection portion, and the upper peripheral wall is the second outflow pipe connection portion. The low back is formed so that it is located below the upper end of the
The lower peripheral wall of the first valve seat member and the upper peripheral wall of the second valve seat member are overlapped so that the low back portion of the first valve seat member and the low back portion of the second valve seat member are vertically stacked. The electrically driven valve according to claim 1, wherein the first valve seat member and the second valve seat member are arranged therein. A cylindrical casing with a valve chamber inside,
An inflow pipe that allows fluid to flow into the valve chamber,
The first outflow pipe that allows the fluid to flow out of the valve chamber,
A second outflow pipe that allows the fluid to flow out of the valve chamber,
A valve seat member provided with a first valve seat and a second valve seat and arranged in the valve chamber so as to communicate with the first outflow pipe and the second outflow pipe.
A piston member having a first valve body and a second valve body and arranged in the casing so as to be movable in the axial direction of the casing.
When the axial direction of the casing is the vertical direction, the urging member that urges the piston member downward and the urging member.
It is provided with an electric drive device that moves the piston member upward against the urging force of the urging member.
The first valve body is in a valve closed state in which the first valve seat is seated to prevent the fluid from flowing out through the first outflow pipe, and the first valve seat is separated from the first valve seat and through the first outflow pipe. It is possible to move forward and backward with respect to the first valve seat with the valve open state that allows the outflow of the fluid.
The second valve body is in a valve closed state in which the second valve seat is seated to prevent the fluid from flowing out through the second outflow pipe, and the second valve seat is separated from the second valve seat and through the second outflow pipe. It is possible to move forward and backward with respect to the second valve seat with the valve open state that allows the outflow of the fluid.
When the piston member is displaced downward due to the urging force of the urging member, the first valve body is seated on the first valve seat and the second valve body is separated from the second valve seat. (Ii) While the fluid is discharged from the valve chamber through the outflow pipe, when the electric drive device displaces the piston member upward, the second valve body is seated on the second valve seat and the first valve is seated. An electrically driven valve that allows the fluid to flow out of the valve chamber through the first outflow pipe by separating the body from the first valve seat.
The valve seat member
It is a pipe member with both ends open.
Arranged in the valve chamber so as to extend in a direction orthogonal to the axial direction of the casing.
A first outflow pipe connection portion to which the first outflow pipe is connected is provided at one end.
A second outflow pipe connection portion to which the second outflow pipe is connected is provided at the other end.
The first valve seat is provided on the upper peripheral wall.
It has the second valve seat on the lower peripheral wall,
The internal space of the valve seat member includes the first outflow pipe connecting portion and the first valve seat chamber including the first valve seat, and the second outflow pipe connecting portion and the second valve seat chamber including the second valve seat. An electrically driven valve characterized by having a partition plate that divides into and. The partition plate
From the lower end of the inner peripheral surface of the valve seat member closer to the first outflow pipe connection portion than the second valve seat, the inner peripheral surface of the valve seat member closer to the second outflow pipe connection portion than the first valve seat. The electrically driven valve according to claim 7, which is a flat plate member that rises diagonally upward toward the upper end portion. The partition plate is
A horizontal plate portion extending so as to vertically divide an intermediate portion of the internal space of the valve seat member in the length direction, including the lower space of the first valve seat and the upper space of the second valve seat. When,
The first vertical plate portion that descends downward from the end portion of the horizontal plate portion on the side close to the first outflow pipe connection portion, and
The electrically driven valve according to claim 7, further comprising a second vertical plate portion of the horizontal plate portion that rises upward from an end portion on the side close to the second outflow pipe connection portion. A cylindrical casing with a valve chamber inside,
An inflow pipe that allows fluid to flow into the valve chamber,
An outflow pipe that allows the fluid to flow out of the valve chamber,
A valve seat member provided with a valve seat and arranged in the valve chamber so as to communicate with either the outflow pipe or the inflow pipe.
A piston member provided in the casing and provided with a valve body and movable in the axial direction of the casing.
When the axial direction of the casing is the vertical direction, the urging member that urges the piston member downward and the urging member.
It is provided with an electric drive device that moves the piston member upward against the urging force of the urging member.
The valve body can move forward and backward with respect to the valve seat between a valve closed state in which the valve body is seated on the valve seat and shuts off the flow path and a valve open state in which the flow path is opened away from the valve seat. And
When the piston member is displaced downward due to the urging force of the urging member, the valve body is seated on the valve seat to block the flow path, while the electric drive device displaces the piston member upward. When the valve body is separated from the valve seat, it is an electrically driven valve that opens the flow path.
The valve seat member is an electrically driven valve that extends in the valve chamber in a direction orthogonal to the axial direction of the casing and has the valve seat formed on the upper peripheral wall. The valve seat member has a recess that is recessed downward on the upper peripheral surface.
The electrically driven valve according to claim 10, wherein the valve seat is provided in the recess. The casing is a bottomless tubular member and has no lid.
The electrically driven valve according to claim 10 or 11, wherein an intermediate portion between one end and the other end of the valve seat member is provided with a bulging portion that projects downward and abuts on the bottom of the casing. A cylindrical casing with a valve chamber inside,
An inflow pipe that allows fluid to flow into the valve chamber,
An outflow pipe that allows the fluid to flow out of the valve chamber,
A valve seat member provided with a valve seat and arranged in the valve chamber so as to communicate with either the outflow pipe or the inflow pipe.
A piston member provided in the casing and provided with a valve body and movable in the axial direction of the casing.
When the axial direction of the casing is the vertical direction, the urging member that urges the piston member downward and the urging member.
It is provided with an electric drive device that moves the piston member upward against the urging force of the urging member.
The valve body can move forward and backward with respect to the valve seat between a valve closed state in which the valve body is seated on the valve seat and shuts off the flow path and a valve open state in which the flow path is opened away from the valve seat. And
When the piston member is displaced downward due to the urging force of the urging member, the valve body is separated from the valve seat to open the flow path, while the electric drive device displaces the piston member upward. When the valve body is seated on the valve seat, it is an electrically driven valve that shuts off the flow path.
The valve seat member is an electrically driven valve that extends in the valve chamber in a direction orthogonal to the axial direction of the casing and has the valve seat formed on the lower peripheral wall. The valve seat member has a recess that is recessed upward on the lower peripheral surface.
The electrically driven valve according to claim 13, wherein the valve seat is provided in the recess. The valve seat member is a pipe member with both ends open.
One of the outflow pipe and the inflow pipe is connected to one end of the valve seat member.
The electrically driven valve according to any one of claims 10 to 14, wherein the other end of the valve seat member is closed by brazing to the inner peripheral surface of the casing. The valve seat member is a pipe member having one end open and the other end closed.
The electrically driven valve according to any one of claims 10 to 14, wherein any one of the outflow pipe and the inflow pipe is connected to the one end. It can be fixed to the other end of the valve seat member in a direction orthogonal to the axial direction of the casing and fixed to the valve chamber side end of the outflow pipe and the inflow pipe or the inner peripheral surface of the casing. The electrically driven valve according to claim 16, further comprising a protrusion. The electrically driven valve according to claim 16, wherein the one end of the valve seat member is provided with a flange that projects outward from the peripheral wall end of the valve seat member and abuts on the outer peripheral surface of the casing.

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