JP5467208B2 - Pouring solenoid valve - Google Patents

Description

  The present invention relates to a hot water solenoid valve, and in particular, is disposed in the middle of a pipe that guides hot water of a hot water supply device to a bathtub, and when the bathtub is installed at a higher position than the hot water supply device, the sewage in the bathtub flows back to the water supply. The present invention relates to a pouring solenoid valve that can prevent the occurrence of the above.

  In the bath hot water supply system, a hot water supply pipe connected to a hot water supply faucet is branched from a hot water supply apparatus so that hot water is supplied to a bathtub. In the middle of the piping, a pouring solenoid valve is generally arranged. As the pouring solenoid valve, there are a flow sensor for detecting the amount of hot water to the bathtub, an electromagnetic valve for controlling the hot water supply to the bathtub, an air release valve for releasing the sewage flowing back from the bathtub to the atmosphere, What is provided with the non-return valve which prevents the backflow of dirty water is known (for example, refer patent document 1).

FIG. 2 is a central longitudinal sectional view showing a configuration example of a conventional pouring electromagnetic valve.
This pouring electromagnetic valve is described in Patent Document 1 described above, and includes a cylindrical first main body 101 and a second main body 102 formed in an L shape, and the first main body 101 A hot-water supply pipe branched from the hot-water supply device is connected to the inlet-side joint, and a pipe is connected to the outlet-side joint of the second main body 102 to the bathtub. A flow sensor 103 is provided in the first main body 101, and a primary check valve 104 is provided in a joint portion between the first main body 101 and the second main body 102. A secondary check valve 105 is provided inside the outlet side joint. The first main body 101 also includes an electromagnetic valve 106 at the intersection between the center line of the first main body 101 and the center line of the second main body 102.

  The first main body 101 further includes a pressure detecting portion 107 branched from between the inlet side joint and the flow sensor 103. The second main body 102 includes a primary check valve 104 and a secondary check valve. A branch pipe 108 is installed on the side wall at a position between the valve 105 and the valve 105. An air release valve 109 is installed between the pressure detection unit 107 and the branch pipe 108.

  The air release valve 109 detects the water pressure of the hot water introduced into the first main body 101 through the pressure detection unit 107, and reacts with the water pressure between the primary check valve 104 and the secondary check valve 105. The space between them is cut off from the atmosphere or communicated with the atmosphere.

  According to the pouring solenoid valve having the above-described configuration, high-pressure hot water is introduced into the first main body 101 in a normal use state, and at this time, the water pressure is supplied to the atmosphere release valve via the pressure detection unit 107. 109. Therefore, the air release valve 109 is closed by receiving the water pressure into which the bellophram is introduced in the valve closing direction. Here, when the solenoid valve 106 is energized, the solenoid valve 106 opens and allows hot water introduced into the first main body 101 to pass therethrough. The hot water passes through the primary check valve 104 and the secondary check valve 105 and is supplied to the bathtub.

  If the feed water pressurization pump stops due to water outage or power failure, the water pressure on the feed water side may drop and become negative pressure. In such a case, the water pressure of the hot water introduced into the first main body 101 decreases. This decrease in water pressure is transmitted to the atmosphere release valve 109 via the pressure detection unit 107. The air release valve 109 operates in the valve opening direction when the belofram receives a drop in water pressure, and is fully opened. As a result, the space between the primary check valve 104 and the secondary check valve 105 of the second main body 102 is communicated with the atmosphere through the branch pipe 108, and the water accumulated in the space of the molten metal solenoid valve It is discharged outside. This operation of the air release valve 109 causes the secondary check valve 105 to be in a state in which it does not function normally due to the entry of foreign matter, etc., and sewage from the bathtub passes through the secondary check valve 105. In such a case, such sewage is drained to the outside by the air release valve 109, so that it is at a low pressure through the primary check valve 104 and the electromagnetic valve 106. It is possible to prevent the water from flowing back to the water side.

Japanese Patent No. 3772111

  However, the conventional pouring electromagnetic valve accommodates a flow sensor, provides a pressure detection unit in a first main body to which the electromagnetic valve is attached, and a branch pipe in a second main body in which primary and secondary check valves are accommodated. Since the air release valve that functions as a single unit is simply connected to the pressure detection section and the branch pipe, the number of parts is large and the manufacturing cost is high.

  This invention is made | formed in view of such a point, and it aims at providing the molten metal solenoid valve which reduced the number of parts and suppressed manufacturing cost.

In the present invention in order to solve the above problems, is arranged a discharge pipe for deriving an introduction pipe for introducing hot water are orthogonal, the solenoid valve is arranged at the end of the outlet tube of the inlet pipe side, the An atmosphere in which a primary check valve and a secondary check valve are arranged in the outlet pipe, and the space between the primary check valve and the secondary check valve is opened to the atmosphere in response to a decrease in feed water pressure. In a pouring electromagnetic valve provided with an open valve, a change in the water pressure of the annular space by communicating with an annular space around the main valve seat of the solenoid valve, which is arranged on the axis of the outlet pipe and formed in a cylindrical shape a test pressure section for transmitting to said air release valve as the change in the supply water pressure, the inlet tube, the main valve seat of the solenoid valve, prior Kishirube extraction tube, the housing and the overflow port of the air open valve, and wherein a first body where the test pressure portion formed integrally, the in the first body air And a second body having a pressure detecting passage for communicating with said diaphragm chamber and the test pressure section with constituting the diaphragm chamber of the air release valve when secured to the housing of Houben, said analyzing The pressure portion is formed in the first main body in a direction perpendicular to the axis of the outlet pipe at a position closer to the solenoid valve than the axis of the inlet pipe. Is provided.

  According to such a pouring solenoid valve, the main body is constituted by two points of the first main body including the housing and the overflow port of the atmospheric release valve and the second main body constituting the diaphragm chamber of the atmospheric release valve. Therefore, the number of parts can be reduced.

  The pouring solenoid valve configured as described above is configured such that the atmosphere release valve detects the water pressure in the annular space upstream of the solenoid valve, so that the atmosphere release valve is disposed in the vicinity of the side where the pressure detection unit is provided. It is possible to dispose the atmosphere release valve close to the axis of the introduction pipe. Accordingly, the secondary check valve can be arranged close to the primary check valve, and the total length in the length direction of the outlet pipe can be shortened, so that the pouring solenoid valve can be configured compactly. There are advantages in that the manufacturing cost can be reduced and the degree of freedom in installing the pouring solenoid valve can be improved.

  In addition, since the total length of the outlet pipe in the length direction can be shortened, the amount of water accumulated therein can be reduced, so that the possibility of breakage due to freezing can be reduced.

It is a central longitudinal cross-sectional view which shows the structural example of the pouring electromagnetic valve which concerns on embodiment. It is a center longitudinal cross-sectional view which shows the structural example of the conventional molten metal solenoid valve.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a central longitudinal sectional view showing a configuration example of a pouring electromagnetic valve according to an embodiment.
The pouring electromagnetic valve includes a first main body 10, a second main body 11, a flow sensor 20, an electromagnetic valve 30, a primary check valve 40, a secondary check valve 50, and an atmosphere release valve 60. The first main body 10 has a cylindrical introduction pipe 13 having an inlet-side joint 12 to which a pipe from a hot water supply device is connected at one end, and a cylindrical main valve seat 31 constituting a main valve of the electromagnetic valve 30. The pressure detecting portion 15 connected to the annular space 14 located on the outer periphery of the main valve seat 31 is integrally formed. The first main body 10 is also integrally formed with a cylindrical outlet pipe 16 extending in the same axial direction as the main valve seat 31 of the electromagnetic valve 30, and the leading end of the outlet pipe 16 is connected to a bathtub. The outlet side joint 17 connected is comprised. The first main body 10 further includes a housing 18 and an overflow port 19 of the atmosphere release valve 60 integrally formed on the side surface of the outlet pipe 16 where the pressure detection portion 15 is formed. The second main body 11 is attached to the housing 18 of the valve 60.

  The flow sensor 20 is accommodated in the introduction pipe 13 of the first main body 10 and detects the amount of hot water passing therethrough. A strainer 70 is disposed on the upstream side of the flow sensor 20, and the downstream side is connected to the annular space 14 on the upstream side of the electromagnetic valve 30.

  The solenoid valve 30 is configured by a cylindrical main valve seat 31 and a main valve body 32 that operates to open and close the main valve seat 31, and the main valve body 32 is constituted by a diaphragm 33 by a main valve seat 32. It is supported so as to be movable in the direction of contact with and away from 31. The diaphragm chamber 34 partitioned by the diaphragm 33 communicates with the annular space 14 through an orifice formed in the main valve body 32, and is upstream of the primary check valve 40 by a pilot valve seat formed in the center of the main valve body 32. To the outlet pipe 16. The pilot valve seat formed on the main valve body 32 is configured to be opened and closed by a pilot valve body carried on the end face of the movable iron core 35 of the solenoid. Therefore, when the solenoid valve 30 is not energized, the movable iron core 35 is urged by a built-in spring, the pilot valve body is seated on the pilot valve seat, and the diaphragm chamber 34 communicates with the annular space 14. Is in a state of being. At this time, since the pressure of the annular space 14 is equally applied to both surfaces of the diaphragm 33, the main valve holds the closed state. When the solenoid valve 30 is energized, the movable iron core 35 lifts the pilot valve body from the pilot valve seat, and causes the diaphragm chamber 34 to communicate with the downstream side of the main valve. As a result, the pressure in the diaphragm chamber 34 is lowered, so that the diaphragm 33 is pushed up by the pressure in the annular space 14, and the main valve is maintained in the open state.

  The outlet pipe 16 is formed with a step immediately below the main valve seat 31 to constitute a valve seat 41 of the primary check valve 40, and a valve body 42 is disposed on the downstream side of the valve seat 41. The valve body 42 of the primary check valve 40 is held by a holding member 43 so as to be able to advance and retreat in the axial direction of the outlet pipe 16 and is urged by a spring 44 in the valve closing direction.

  The holding member 43 has a step formed on the downstream side thereof to constitute a valve seat 51 of the secondary check valve 50, and a valve body 52 is disposed on the downstream side of the valve seat 51. The valve body 52 of the secondary check valve 50 is held by a holding member 53 so as to be able to advance and retreat in the axial direction of the outlet pipe 16 and is urged by a spring 54 in the valve closing direction.

  The air release valve 60 has a stepped cylinder extending from the outlet pipe 16 in the direction perpendicular to the axis of the lead pipe 16 in the housing 18, and the step between the small diameter cylinder and the large diameter cylinder constitutes the valve seat 61. doing. The large-diameter cylinder is provided with a valve body 62 that can be moved toward and away from the valve seat 61. The valve body 62 is held by a piston 63 and is urged by a spring 64 in a direction away from the valve seat 61. ing. A diaphragm 65 is disposed at the opening of the large-diameter cylinder of the housing 18 so as to close it, and the outer peripheral edge of the diaphragm 65 is sandwiched between the housing 18 and the second main body 11 to be fixed and sealed. Has been made. The central portion of the inner side of the diaphragm 65 is recessed so as to be fitted with a convex portion formed on the opposed end face of the piston 63, and the piston 63 biased toward the diaphragm 65 by the spring 64 is moved to the center of the large-diameter cylinder. Is positioned.

  The second main body 11 is fixed to the first main body 10 with, for example, a screw. At that time, a concave portion that forms a diaphragm chamber 66 between the second main body 11 and the diaphragm 65, and the diaphragm chamber 66 and the pressure detecting portion 15 are formed. And a pressure detection passage 67 that communicates with each other. A connection portion between the pressure detection unit 15 and the pressure detection passage 67 is sealed by an O-ring 68.

  In this way, the pouring electromagnetic valve is formed integrally with the first main body 10 so that the pressure detecting portion 15 communicates with the annular space 14 on the upstream side of the electromagnetic valve 30, and the pressure detecting portion 15 is formed. The air release valve 60 is arranged in the vicinity of the side where the air is discharged. As a result, the first main body 10 can integrally form the inlet pipe 13, the outlet pipe 16, and the main valve seat 31 of the electromagnetic valve 30 including the housing 18 and the overflow port 19 of the atmosphere release valve 60. This shape is formed in consideration of the direction in which the first body 10 is formed by resin molding, for example, and the mold is broken at that time. Moreover, since the atmosphere release valve 60 can be disposed close to the axis of the introduction pipe 13, the secondary check valve 50 can be moved closer to the primary check valve 40, and as a result. The total length in the length direction of the outlet pipe 16 is shortened, the pouring electromagnetic valve can be configured compactly, and the degree of freedom in mounting the pouring electromagnetic valve can be improved. This is because the primary check valve 40, the secondary check valve 50, and the atmospheric release valve 60 are closed and confined in the outlet pipe 16 when the solenoid valve 30 is in a non-energized state in a normal use state. Since the amount of water that has been reduced can be reduced, the possibility of breakage due to freezing can be reduced accordingly.

  In the pouring electromagnetic valve of the illustrated embodiment, the pressure detection unit 15 is formed at a position on the opposite side of the introduction pipe 13 across the main valve seat 31 of the electromagnetic valve 30. The position of the atmosphere release valve 60 arranged on the side on which it is formed is not limited to this. For example, the pressure detection unit 15 is formed at a position in a direction perpendicular to the axis of the introduction pipe 13 from the annular space 14, and the atmosphere release valve 60 is disposed on the side where the pressure detection unit 15 is formed. good. Thereby, compared with the case where the atmosphere release valve 60 is formed at the symmetrical position of the introduction pipe 13 with respect to the main valve seat 31 of the electromagnetic valve 30, the total length in the length direction of the introduction pipe 13 is shortened, so A valve can be comprised compactly and the attachment freedom degree of a pouring electromagnetic valve can further be improved.

  In the pouring solenoid valve configured as described above, in a normal use state, the diaphragm 65 of the atmosphere release valve 60 receives a high water pressure upstream of the solenoid valve 30 to resist the biasing force of the spring 64. And pushed toward the outlet tube 16. As a result, the valve body 62 is seated on the valve seat 61, the atmosphere release valve 60 is closed, and the space between the primary check valve 40 and the secondary check valve 50 of the outlet pipe 16 is shut off from the atmosphere. ing. At this time, the solenoid valve 30 is closed when the solenoid is in a non-energized state.

  In this state, when the solenoid valve 30 is opened by energization of the solenoid, the hot water introduced from the hot water supply device to the inlet side joint 12 causes the flow sensor 20, the solenoid valve 30, the primary check valve 40, and the secondary check valve 50 to flow. It flows through and is led out from the outlet side joint 17 to the bathtub.

  Here, when a negative pressure is generated in the water supply pipe due to a stoppage of the water supply pressurization pump or a water stoppage due to a power failure, the water pressure in the introduction pipe 13 decreases, so that the diaphragm 65 of the atmosphere release valve 60 decreases its water pressure. Is detected and displaced toward the second main body 11. Along with this, the spring 64 separates the piston 63 and the valve body 62 carried by the piston 63 from the valve seat 61, and the atmosphere release valve 60 is fully opened. Thereby, the space between the primary check valve 40 and the secondary check valve 50 of the outlet pipe 16 is communicated with the atmosphere through the overflow port 19, and the primary check valve 40 and the secondary check valve 50 are connected to each other. The water accumulated in the space between them will be drained to the outside.

  At this time, if the bathtub is installed at a position higher than the hot water supply device, and the secondary check valve 50 disposed on the bathtub side is poor in watertightness due to the biting of foreign matter, the bathtub The sewage in the water flows back to the atmosphere release valve 60 through the secondary check valve 50 due to the water head pressure, but the sewage is discharged to the atmosphere by the atmosphere release valve 60, so that the sewage in the bathtub is heated by the water heater. Furthermore, it is possible to prevent the water from flowing back to the water supply system that supplies water to the hot water supply device.

DESCRIPTION OF SYMBOLS 10 1st main body 11 2nd main body 12 Inlet side joint 13 Inlet pipe 14 Annular space 15 Pressure detection part 16 Outlet pipe 17 Outlet side joint 18 Housing 19 Overflow port 20 Flow sensor 30 Electromagnetic valve 31 Main valve seat 32 Main valve body 33 Diaphragm 34 Diaphragm chamber 35 Movable iron core 40 Primary check valve 41 Valve seat 42 Valve body 43 Holding member 44 Spring 50 Secondary check valve 51 Valve seat 52 Valve body 53 Holding member 54 Spring 60 Atmospheric release valve 61 Valve seat 62 Valve body 63 Piston 64 Spring 65 Diaphragm 66 Diaphragm chamber 67 Pressure detection passage 68 O-ring 70 Strainer

Claims (3)

An inlet pipe for introducing hot water and an outlet pipe for outlet are arranged orthogonally , an electromagnetic valve is arranged at an end of the outlet pipe on the inlet pipe side, and a primary check valve and a secondary valve are arranged in the outlet pipe. In the pouring solenoid valve provided with an air release valve that is arranged with a check valve and opens the space between the primary check valve and the secondary check valve to the atmosphere in response to a decrease in the feed water pressure,
The atmosphere release valve is configured such that a change in water pressure in the annular space is defined as a change in water supply pressure by communicating with an annular space around the main valve seat of the solenoid valve arranged on the axis of the outlet pipe and formed in a cylindrical shape. A pressure sensing part to be transmitted to,
Said inlet, a first body forming said main valve seat of the solenoid valve, prior Kishirube extraction tube, the housing and the overflow port of the air open valve, and the test pressure portion integrally,
A second pressure sensing passage that forms a diaphragm chamber of the atmospheric pressure release valve and communicates the pressure sensing portion and the diaphragm chamber when fixed to the housing of the atmospheric pressure relief valve in the first main body ; The body,
The pressure detecting unit is formed in the first main body in a direction perpendicular to the axis of the outlet pipe at a position closer to the solenoid valve than the axis of the inlet pipe. To pour solenoid valve.   The pressure detection unit is formed by the first main body at a position opposite to the introduction pipe across the main valve seat of the electromagnetic valve, and the atmosphere release valve is formed on the side where the pressure detection unit is formed. The molten metal solenoid valve according to claim 1, wherein the housing and the overflow port are formed by the first main body.   The pouring solenoid valve according to claim 1, wherein a flow sensor is provided in the introduction pipe.

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