JP2006009959A - Hot and cool water mixing valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot- and cool water mixing valve which can prevent a failure to control the temperature of mixed water. <P>SOLUTION: The mixing valve comprises an outer cylinder in which hot-water and cool-water inlets are formed in its circumference, and the bottomed inner cylinder which is slidably removably accommodated within the outer cylinder and in which through-holes which can communicate with a hot-water inlet and a cool-water inlet are formed, wherein the open end of the inner cylinder is a hot- and cool-water mixing valve which forms the mixed water outlet, wherein a hot-water supply path extending from a hot-water inlet to a joint with hot-water supply pipe and a water supply path extending from water inlet to a joint with water supply pipe are symmetry to each other across the central axis of the outer cylinder. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a hot and cold mixing valve.

An outer cylinder in which a hot water inlet and a water inlet are formed in the peripheral wall, and a bottomed inner in which a through hole is formed in the peripheral wall so that the peripheral wall can communicate with the hot water inlet and / or the water inlet. 2. Description of the Related Art Conventionally, a hot and cold water mixing valve is used which includes a cylinder and an open end of an inner cylinder forms a mixed water outlet.

In conventional hot water mixing valves, the structure of the hot water supply path from the hot water inlet to the connection with the hot water supply pipe is different from the structure of the water supply path from the water inlet to the connection with the water supply pipe. The loss and the pressure loss due to the water supply path are not balanced, the primary pressure on the hot water side and the primary pressure on the water side are not balanced, and the temperature control of the mixed water has become unstable.
This invention is made | formed in view of the said problem, and it aims at providing the hot water mixing valve by which generation | occurrence | production of the situation where the temperature control of mixed water malfunctions was suppressed.

In order to solve the above problems, in the present invention, an outer cylinder in which a hot water inlet and a water inlet are formed in a peripheral wall, a hot water inlet and / or a water inlet in a peripheral wall that are slidably rotated in the outer cylinder, and A hot water mixing valve having a bottomed inner cylinder formed with a through-hole capable of communicating, the open end of the inner cylinder forming a mixed water outlet, and a hot water supply path from the hot water inlet to a connecting portion with a hot water supply pipe A hot water mixing valve is characterized in that the water supply path from the water inlet to the connection portion with the water supply pipe has a symmetrical structure with the central axis of the outer cylinder in between.

In the hot / cold water mixing valve according to the present invention, the hot water supply path from the hot water inlet to the connection part of the hot water supply pipe and the water supply path from the water inlet to the connection part of the water supply pipe sandwich the central axis of the outer cylinder. Therefore, the pressure loss due to the hot water supply path and the pressure loss due to the water supply path are balanced, and the primary pressure on the hot water side and the primary pressure on the water side are balanced. As a result, the occurrence of a situation where the temperature control of the mixed water becomes unstable is suppressed.

In a preferred embodiment of the present invention, the hot and cold water mixing valve includes a secondary side passage member, and the open end of the inner cylinder is connected to the secondary side passage member via an inlay joint.
By connecting the open end of the inner cylinder forming the mixed water outlet to the secondary side passage member via the spigot joint, the inner cylinder is eccentric due to the primary pressure applied to the inner cylinder peripheral wall via the hot water inlet or water inlet. Is suppressed, and the water stoppage of the sliding contact portion between the inner cylinder and the outer cylinder is improved. In addition, the length of the leakage path from the sliding contact portion between the inner cylinder and the outer cylinder to the secondary side passage is increased, and the leakage path is bent, so that the pressure loss of hot water passing through the leakage path increases, and the leakage path is The leakage of hot water to the secondary side passage is suppressed.

In a preferred embodiment of the present invention, a protrusion is formed on the inner surface of the inner cylinder.
When assembling the hot and cold mixing valve, it is necessary to accurately position the zero rotation position of the inner cylinder with respect to the zero rotation position of the inner cylinder driving device. If a protrusion is formed on the inner surface of the inner cylinder, an appropriate jig can be engaged with the protrusion to accurately position the zero rotation position of the inner cylinder with respect to the zero rotation position of the inner cylinder driving device. it can.

In a preferred embodiment of the present invention, a plurality of grooves are formed on the outer peripheral surface of the inner cylinder.
In a preferred aspect of the present invention, a plurality of grooves are formed in the sliding contact portion of the inner peripheral surface of the outer cylinder with the inner cylinder.
A plurality of grooves are formed on the outer peripheral surface of the inner cylinder, or by forming a plurality of grooves on the sliding contact portion with the inner cylinder on the inner peripheral surface of the outer cylinder, the water stoppage of the sliding contact portion between the inner cylinder and the outer cylinder is Improved by the labyrinth effect.

In a preferred aspect of the present invention, the secondary passage member is detachably connected to the outer cylinder.
By detachably connecting the secondary passage member to the outer cylinder, it is possible to cope with variations in downstream piping by changing only the secondary passage member in various ways without changing the entire valve. Become.

In a preferred embodiment of the present invention, the secondary passage member is bent in an L shape and is rotatably connected to the outer cylinder.
By bending the secondary passage member in an L shape, mixing of hot water is promoted by turbulent flow generated at the bent portion. By connecting the secondary side passage to the outer cylinder so as to be rotatable, the degree of freedom of arrangement of the downstream side pipe is increased, and the water-circulating device including the hot and cold water mixing valve is miniaturized.

In the preferable aspect of this invention, the connection part with hot water supply piping and the connection part with water supply piping can respond to both a quick fastener connection and U pin connection.
If the connection part with the hot water supply pipe and the connection part with the water supply pipe can handle both the quick fastener connection and the U pin connection, the selection range of the connection jig is widened, which is convenient.

In a preferred embodiment of the present invention, at least one of the inner cylinder, the outer cylinder, and the secondary side passage member is formed of resin.
By forming at least one of the inner cylinder, the outer cylinder, and the secondary side passage member from resin, the hot and cold water mixing valve is reduced in weight.

In the hot / cold water mixing valve according to the present invention, the hot water supply path from the hot water inlet to the connection part of the hot water supply pipe and the water supply path from the water inlet to the connection part of the water supply pipe sandwich the central axis of the outer cylinder. Therefore, the pressure loss due to the hot water supply path and the pressure loss due to the water supply path are balanced, and the primary pressure on the hot water side and the primary pressure on the water side are balanced. As a result, the occurrence of a situation where the temperature control of the mixed water becomes unstable is suppressed.

A hot and cold water mixing valve according to an embodiment of the present invention will be described.

As shown in FIG. 1, the hot and cold water mixing valve A includes a cylindrical outer cylinder 1 in which a hot water inlet 1a and a water inlet 1b facing each other are formed on a peripheral wall. Cylindrical connecting portions 1c and 1d extend radially outward from the hot water inlet 1a and the water inlet 1b. The check valves 2a and 2b are fitted and fixed to the ends of the cylindrical connection portions 1c and 1d. The ends of the cylindrical connection portions 1c and 1d are connected to the hot water supply pipe 100 and the water supply pipe 200 by U pin connection using the U pins 3a and 3b. Connection portions between the cylindrical connection portions 1c and 1d and the hot water supply pipe 100 and the water supply pipe 200 are sealed by O-rings 4a and 4b.
As can be seen from FIG. 1, the hot water supply path from the hot water inlet 1a to the connection part with the hot water supply pipe 100 and the water supply path from the water inlet 1b to the connection part with the water supply pipe 200 are located between the central axis X of the outer cylinder. It has a symmetrical structure between the two.

A bottomed cylindrical inner cylinder 5 with one end closed is accommodated in the outer cylinder 1 so as to be slidable and rotatable. As shown in FIG. 2, a through hole 5 a having a substantially elliptical shape in front view that can communicate with the hot water inlet 1 a and / or the water inlet 1 b is formed in the peripheral wall of the inner cylinder 5. The through-hole 5a is divided into two symmetrical halves facing each other with the reinforcing rib 5b interposed therebetween by a reinforcing rib 5b formed by a part of the peripheral wall of the inner cylinder 5 and extending in the longitudinal direction of the inner cylinder 5. Has been. As shown in FIG. 1, the open end of the inner cylinder 5 forms a mixed water outlet 5c.
As shown in FIG. 1, a rod 6 extending from the closed end of the inner cylinder 5 penetrates one end of the outer cylinder 1 so as to be slidably rotatable, and extends outward of the outer cylinder 1. The outer cylinder penetration part of the rod 6 is sealed by O-rings 7a and 7b. An end 6 a of the rod 6 extending outside the outer cylinder is serrated to the output shaft of the stepping motor 300.

As shown in FIG. 1, one end of the secondary passage member 7 bent in an L shape is fitted into the other end of the outer cylinder 1, and the other end of the outer cylinder 1 is connected by a U pin connection using a U pin 8. The end is detachably and rotatably connected. A connecting portion between the secondary passage member 7 and the other end of the outer cylinder 1 is sealed by an O-ring 9.
The one end of the secondary passage member 7 is connected to the open end of the inner cylinder 5 via the spigot joint 10.
The other end of the secondary passage member 7 is fitted into one end of a downstream pipe 400 that extends toward a watering device (not shown), and is connected to one end of the downstream pipe 400 by a U pin connection using the U pin 11. ing. A connection portion between the other end of the secondary passage member 7 and one end of the downstream pipe 400 is sealed by an O-ring 12.
The outer cylinder 1, the inner cylinder 5, and the secondary side passage member 7 are formed of resin.

In the hot water mixing valve A, hot water that has flowed into the inner cylinder 5 from the hot water supply pipe 100 through the check valve 2a, the hot water inlet 1a, and the through hole 5a, and the check valve 2b and the water inlet 1b from the water supply pipe 200, Hot water that has flowed into the inner cylinder 5 through the through hole 5 a is mixed in the inner cylinder 5. The mixed water flows out to the downstream pipe 400 through the mixed water outlet 5c and the secondary side passage member 7, and is supplied to a watering device (not shown). By controlling the rotation angle of the inner cylinder 5 by the stepping motor 300, the mixing ratio of hot water and water is controlled, and the temperature of the mixed water is controlled.

The hot water supply path from the hot water inlet 1a to the connection part with the hot water supply pipe 100 and the water supply path from the water inlet 1b to the connection part with the water supply pipe 200 have an asymmetric structure with the central axis X of the outer cylinder 1 in between. If it exists, since the pressure loss by the said hot water supply path | route and the pressure loss by the said water supply path | route do not balance and the primary pressure of the hot water side and the primary pressure of the water side do not balance, the temperature control of the mixed water by the hot water mixing valve A is possible. It may cause a malfunction. In the hot water mixing valve A, the hot water supply path from the hot water inlet 1a to the connection part with the hot water supply pipe 100 and the water supply path from the water inlet 1b to the connection part with the water supply pipe 200 are connected to the central axis X of the outer cylinder 1. By having a symmetrical structure sandwiched between them, the pressure loss due to the hot water supply path and the pressure loss due to the water supply path are balanced, the primary pressure on the hot water side and the primary pressure on the water side are balanced, and the mixed water temperature control malfunctions. Occurrence is suppressed.

In the hot water mixing valve A, the open end of the inner cylinder 5 that forms the mixed water outlet 5c is connected to one end of the secondary passage member 7 via the spigot joint 10, so that the hot water inlet 1a and the water inlet The eccentricity of the inner cylinder 5 due to the primary pressure is suppressed by being applied to the peripheral wall of the inner cylinder 5 through 1b, and the water stoppage of the sliding contact portion between the inner cylinder 5 and the outer cylinder 1 is improved.
In the hot and cold water mixing valve A, the length of the leakage path P from the sliding contact portion between the inner cylinder 5 and the outer cylinder 1 to the secondary side passage formed by the secondary side passage member 7 due to the arrangement of the spigot joint 10. Increase in pressure and the pressure loss of hot water passing through the leakage path P due to bending of the leakage path P due to the arrangement of the spigot joint 10, so that the hot water to the secondary passage through the leakage path P is increased. Leakage is suppressed.

In the hot / cold water mixing valve A, since the secondary side passage member 7 is detachably connected to the outer cylinder 1, only the secondary side passage member 7 is variously changed without changing the entire hot water / water mixing valve A. By changing, it is possible to cope with variations of the downstream pipe 400.

In the hot water mixing valve A, since the secondary side passage member 7 is bent in an L shape, mixing of hot water is promoted by the generation of turbulent flow at the bent portion.
In the hot water mixing valve A, since the secondary side passage member 7 is rotatably connected to the outer cylinder 1, the degree of freedom of arrangement of the downstream side pipe 400 is increased, and the water-circulating device including the hot water mixing valve A is provided. It is downsized.

The hot / cold water mixing valve A includes an outer cylinder 1, an inner cylinder 5, and a secondary passage member 7 formed of a resin, so that these members are lighter than conventional hot / water mixing valves formed of metal. It is. In addition, since the resin member does not require machining, the hot and cold water mixing valve A is less expensive to manufacture than the conventional hot and cold water mixing valve provided with a metal member that requires machining. Any one or two of the outer cylinder 1, the inner cylinder 5, and the secondary passage member 7 may be formed of resin.
If the inner cylinder 5 in which the through-hole 5a is formed in the peripheral wall is resin-molded, the peripheral wall may be distorted by deformation after demolding, and the water stoppage of the sliding contact portion between the inner cylinder 5 and the outer cylinder 1 may be reduced. In the hot / cold water mixing valve A, reinforcing ribs 5b extending in the longitudinal direction of the inner cylinder 5 are formed in the through holes 5a formed in the peripheral wall of the inner cylinder 5, and the torsional rigidity and bending rigidity of the inner cylinder 5 are formed. Therefore, the deformation of the peripheral wall of the inner cylinder 5 after demolding is suppressed, and a decrease in the water stoppage of the sliding contact portion between the inner cylinder 5 and the outer cylinder 1 due to resin molding of the inner cylinder 5 is suppressed.

As shown in FIG. 3, an annular groove 7 a may be formed on the end face of the secondary passage member 7 adjacent to the spigot joint 10. You may leave the outer peripheral corner | angular part 5d of the open end of the inner cylinder 5 which forms the spigot joint 10 at right angle, without carrying out R process.
Due to the generation of vortices in the annular groove 7a and the promotion of the generation of vortices at the outer peripheral corner 5d, the sliding contact portion between the inner cylinder 5 and the outer cylinder 1 leads to the secondary side passage formed by the secondary side passage member 7. The pressure loss of the hot water passing through the leakage path P to reach increases, and the leakage of hot water to the secondary side passage via the leakage path P is suppressed.

A protrusion may be formed on the inner surface of the inner cylinder 5.
When assembling the hot and cold mixing valve A, the zero rotation position of the inner cylinder 5 is accurately positioned with respect to the zero rotation position of the stepping motor 300, and the rod end 6 a is serrated to the output shaft of the stepping motor 300. There is a need. If a protrusion having an appropriate shape is formed on the inner surface of the inner cylinder 5, the zero rotation position of the inner cylinder 5 can be accurately set with respect to the zero rotation position of the stepping motor 300 using a jig that can be engaged with the protrusion. Can be positioned.
As shown by the alternate long and short dash line in FIG. 2B, if the reinforcing rib 5b is extended inward in the radial direction to form a protrusion, the rigidity of the reinforcing rib 5b increases, and demolding when the inner cylinder 5 is resin-molded. Later deformation of the inner cylinder 5 is further suppressed. The reinforcing rib 5b may be extended to the inner surface facing the inner cylinder 5 and abutted against the inner surface.

As shown in FIG. 4 (a), a plurality of grooves 5e extending in the longitudinal direction is formed on the outer peripheral surface of the inner cylinder 5, or as shown in FIG. 4 (b), on the outer peripheral surface of the inner cylinder 5. A plurality of grooves 5f extending in the circumferential direction may be formed. The groove may be a recess formed on the outer peripheral surface of the inner cylinder, or may be a recess formed between a plurality of ridges formed on the outer peripheral surface.
A plurality of grooves extending in the longitudinal direction or a plurality of grooves extending in the circumferential direction may be formed in the sliding contact portion of the inner peripheral surface of the outer cylinder 1 with the inner cylinder 5. The groove may be a recess formed on the inner peripheral surface of the outer cylinder, or may be a recess formed between a plurality of ridges formed on the inner peripheral surface.
A plurality of grooves 5e or 5f are formed on the outer peripheral surface of the inner cylinder 5, or a plurality of grooves are formed in a sliding contact portion with the inner cylinder 5 on the inner peripheral surface of the outer cylinder 1, whereby the inner cylinder 5 and the outer cylinder are formed. The water stoppage of the sliding contact portion of 1 is improved by the labyrinth effect.

As shown in FIG. 5, the U-pin 3 is used for the connecting portion between the cylindrical connecting portion 1 c of the outer cylinder and the hot water supply pipe 100, and the connecting portion between the cylindrical connecting portion 1 d of the outer cylinder and the water supply pipe 200. You may comprise so that it can respond to any of U pin connection and quick fastener connection using the quick fastener 13. FIG.
The connection part of the outer cylinder 1 with the hot water supply pipe 100 and the connection part of the water supply pipe 200 can correspond to either a U pin connection using the U pin 3 or a quick fastener connection using the quick fastener 13. If it exists, the range of selection of the connection jig which connects the hot-water mixing valve A, the hot-water supply pipe 100, and the water-supply pipe 200 is widened, which is convenient.

The present invention is widely applicable to hot and cold mixing valves.

It is sectional drawing of the hot and cold water mixing valve according to the embodiment of the present invention. It is a structural diagram of the inner cylinder with which the hot and cold water mixing valve according to the embodiment of the present invention is provided. (A) is a front view, (b) is a side view. It is a partial expanded sectional view of the hot and cold water mixing valve according to another embodiment of the present invention. It is a side view of the inner cylinder with which the hot water mixing valve which concerns on the other Example of this invention is provided. It is a partial expanded sectional view of the hot and cold water mixing valve according to another embodiment of the present invention.

Explanation of symbols

A Hot water / water mixing valve 1 Outer cylinder 1a Hot water inlet 1b Water inlet 5 Inner cylinder 5a Through hole 5b Reinforcement rib 5c Mixed water outlet 5e, 5f Groove 7 Secondary passage member 10 Inner joint 100 Hot water supply pipe 200 Hot water supply pipe 300 Stepping motor 400 Downstream Side piping

Claims (9)

An outer cylinder in which a hot water inlet and a water inlet are formed in the peripheral wall, and a bottomed inner in which a through hole is formed in the peripheral wall so that the peripheral wall can communicate with the hot water inlet and / or the water inlet. A hot water mixing valve in which the open end of the inner cylinder forms a mixed water outlet, and a hot water supply path from the hot water inlet to the connecting part with the hot water supply pipe, and a connecting part between the water inlet and the water supply pipe A hot and cold water mixing valve, characterized in that the water supply path has a symmetrical structure with the central axis of the outer cylinder in between. The hot and cold water mixing valve according to claim 1, further comprising a secondary side passage member, wherein an open end of the inner cylinder is connected to the secondary side passage member via a spigot joint. The hot and cold water mixing valve according to claim 1, wherein a protrusion is formed on the inner surface of the inner cylinder. The hot and cold water mixing valve according to any one of claims 1 to 3, wherein a plurality of grooves are formed on the outer peripheral surface of the inner cylinder. The hot and cold water mixing valve according to any one of claims 1 to 3, wherein a plurality of grooves are formed in a sliding contact portion between the inner peripheral surface of the outer cylinder and the inner cylinder. The hot and cold water mixing valve according to any one of claims 1 to 5, wherein the secondary passage member is detachably connected to the outer cylinder. The hot and cold water mixing valve according to any one of claims 1 to 6, wherein the secondary passage member is bent in an L shape and is rotatably connected to the outer cylinder. The hot and cold water according to any one of claims 1 to 7, wherein the connecting portion to the hot water supply pipe and the connecting portion to the water supply pipe are compatible with either a quick fastener connection or a U pin connection. Mixing valve. The hot and cold water mixing valve according to any one of claims 1 to 8, wherein at least one of the outer cylinder, the inner cylinder, and the secondary passage member is formed of resin.

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