JP4936926B2 - Hot water mixing valve - Google Patents

Description

  The present invention relates to a hot / cold water mixing valve, and more particularly to a hot water / water mixing valve with an automatic temperature control function provided with a temperature sensing element in a mixing chamber, and particularly to a technical means for increasing the stirring efficiency of hot water.

2. Description of the Related Art Conventionally, a hot water / water mixing valve having an automatic temperature control function (thermostat type) having a temperature sensing element in a mixing chamber has been widely used.
The hot water mixing valve with automatic temperature control function is as follows: (a) hot water inlet and water inlet provided in the valve case in the axial direction, and (b) hot water inlet and water flow. A valve body provided with a hot water side valve portion and a water side valve portion provided separately in the axial direction corresponding to the inlet, and provided in the valve case so as to be movable in the axial direction; and (c) hot water, water The hot water inlet, the hot water to be introduced from the water inlet to the hot water joint in the valve case, the water introduction path, (d) the mixing chamber for mixing hot water, and (e) the mixing chamber. A temperature sensing element that expands and contracts in the axial direction in response to the temperature of the mixed water and automatically adjusts the position of the valve element, and (f) a bias spring that biases the valve element in a direction to contract the temperature sensing element. The opening of the hot water inlet is increased by one movement of the valve body in the axial direction, the opening of the water inlet is changed small, and hot water is moved by the reverse movement of the valve body. A hot and cold water mixing valve is known that changes the inflow ratio of hot water and water by reducing the opening of the inlet and largely changing the opening of the water inlet.
FIG. 10 shows a specific example thereof.

In the figure, reference numerals 200 and 202 denote a water inlet and a hot water inlet formed in the valve case 204, and 201 and 203 denote water and hot water independently from the water inlet 200 and the hot water inlet 202 to the hot water inside the valve case 204, respectively. This is a water and hot water introduction channel that is introduced toward the junction.
Here, the hot water introduction path 203 is composed of a flow path in the centripetal direction through which hot water from the hot water inlet 202 flows and flows toward the center of the valve case 204.

On the other hand, the water introduction path 201 is directed to the flow path 201-1 in the centripetal direction for introducing the water from the water inflow port 200 toward the center of the valve case 204, and subsequently to the mixing chamber 222 described later. It consists of an axial flow path 201-2 that is circulated and introduced.
The water flowing into the valve case 204 from the inlet 200 flows in the axial direction 201-2 in the left direction in the figure, and joins the hot water introduced through the hot water introduction passage 203 and flows into the mixing chamber 222. .

206 is a valve body provided with a water side valve portion 208, a hot water side valve portion 210, and a connecting portion 212 for connecting them in the axial direction, which are separated in the axial direction, and can be moved in the axial direction in the valve case 204. Is provided. Here, each of the water side valve portion 208 and the hot water side valve portion 210 has a cylindrical shape.
The valve case 204 has a water side valve seat 214, a hot water side valve seat corresponding to the water side valve portion 208 and the hot water side valve portion 210, respectively, at a position between the water side valve portion 208 and the hot water side valve portion 210. 216 is provided, and the water side valve portion 208 and the hot water side valve portion 210 are in contact with each other.

The valve body 206 is biased leftward in the drawing by the first bias spring 218 and the second bias spring 220, that is, in a direction to close the water side valve portion 208, and is provided in the mixing chamber 222. The temperature-sensitive spring 224 made of a memory alloy is biased in the direction opposite to the right direction in the figure, that is, in the direction in which the hot water side valve portion 210 is closed.
Here, the mixing chamber 222 is formed on the opposite side in the axial direction from the water inlet 200 with respect to the hot water inlet 202.

  The connecting portion 212 of the valve body 206 has a plurality of reinforcing plates 226 extending in the radial direction from the central portion so that the cross-sectional shape forms a substantially cross shape, and between the reinforcing plates 226 and 226. In addition, the axial flow path 201-2 is formed.

  Reference numeral 230 denotes a rotation operation shaft. By rotating the rotation operation shaft, the urging force of the first bias spring 218 and the second bias spring 220 is changed to be strong or weak, whereby the position of the valve body 206 in the horizontal direction in the figure is changed. Specifically, the balance position of the urging forces of the first bias spring 218, the second bias spring 220, and the temperature-sensitive spring 224 is shifted in the left-right direction. That is, the temperature of the mixed water in the hot / cold water mixing valve is set to the desired temperature or the setting is changed.

  In this hot and cold water mixing valve, the valve body 206 moves to the left in the drawing as far as it is full, and the water side valve portion 208 abuts on the water side valve seat 214, so that the water inlet 200 (strictly, the water introduction path 201; hereinafter the same). ) Is fully closed, and the hot water inlet 202 (strictly speaking, the hot water introduction passage 203; the same applies hereinafter) is fully opened, and the hot water side valve portion 210 is brought into contact with the hot water side valve seat 216 in the opposite direction. Thus, the hot water inlet 202 is fully closed and the water inlet 200 is fully opened.

In addition, the water inlet 200 and the hot water inlet 202 are opened at their intermediate positions, and the opening amounts thereof are changed to change the inflow amounts of water and hot water.
Specifically, when the rotary operation shaft 230 is rotated (forward rotation) when the hot water side valve portion 210 is fully closed and the water side valve portion 208 is fully open, the first bias spring 218 and the second bias spring 220 are operated. The urging force is increased and the valve body 206 is shifted leftward in the figure.
In the shifted state, the left biasing force by the first bias spring 218 and the second bias spring 220 and the right biasing force by the temperature-sensitive spring 224 are balanced, and in this state, the water inlet 200 and the hot water flow are balanced. When the temperature of the mixed water of hot water and hot water flowing in from the inlet 202 fluctuates, the temperature sensing spring 224 increases or decreases the biasing force, and the temperature sensing spring 224 causes the valve body 206 to move in the left-right direction with axial expansion and contraction. Slightly move. Thereby, the temperature of mixed water is maintained at preset temperature.

On the other hand, when the rotation operation shaft 230 is rotated in the reverse direction, the urging forces of the first bias spring 218 and the second bias spring 220 are reduced, and thereby the valve body 206 is shifted rightward in the drawing. The mixed water temperature is adjusted by increasing or decreasing the biasing force based on the temperature sensing of the temperature-sensitive spring 224 at the shift position.
In addition, about this kind of hot water mixing valve with an automatic temperature control function, it is disclosed by the following patent document 1, for example.

  By the way, in this kind of hot water mixing valve with automatic temperature control function, there is a problem that the temperature control is affected by fluctuations in the water supply pressure and the hot water supply pressure. However, even if the mixing temperature is set to 40 ° C., for example, by the rotary operation shaft 230, there is a problem that the actual water discharge temperature becomes lower or higher than 40 ° C.

The reason is that mixing and stirring of water and hot water in the mixing chamber 222 is not necessarily performed sufficiently satisfactorily, and the temperature-sensitive spring 224 does not necessarily follow or respond to changes in the mixing ratio of water and hot water. There is.
Such a phenomenon is a problem that occurs not only in the hot water / water mixing valve of the above type, but also in other general hot water / water mixing valves with an automatic temperature control function.

In view of such a problem, various proposals have been made for efficiently mixing and stirring hot water and water.
For example, the following Patent Document 2 and Patent Document 3 disclose such examples.
However, those disclosed in these patent documents form a spiral guide groove that causes a swirling flow in the mixing chamber to promote mixing, but a sufficient mixing effect cannot be obtained, which is different from the present invention. Is.

JP 2001-4050 A JP-A-5-272650 JP 2004-270878 A

  The present invention is based on the circumstances as described above, and it is possible to achieve good mixing of hot water and hot water that can satisfactorily suppress or prevent fluctuations in the water discharge temperature regardless of fluctuations in the water supply pressure and the hot water supply pressure. The purpose is to provide a mixing valve.

Thus, according to the first aspect of the present invention, (a) a hot water inlet and a water inlet provided in the valve case so as to be separated from each other in the axial direction, and (b) an axial direction corresponding to the hot water inlet and the water inlet. A hot water side valve portion and a water side valve portion provided separately, a valve body provided in the valve case so as to be movable in the axial direction, and (c) hot water and water independently Sensitive to the temperature of the mixed water in the mixing chamber and (e) the mixing chamber for hot water and water introduced from the inlet and the water inlet to the hot water / water junction inside the valve case. A temperature sensing element that expands and contracts in the axial direction and automatically adjusts the position of the valve element, and (f) a bias spring that biases the valve element in a direction to contract the temperature sensing element, The opening of the hot water inlet is increased by one movement of the valve body in the axial direction, the opening of the water inlet is changed small, and the movement of the valve body in the reverse direction causes the hot water inlet to In a hot and cold water mixing valve that changes the inflow ratio of hot water and water by changing the degree of opening of the water inlet to a large degree, the valve case that forms the introduction path in the hot water or water, or / and said valve body, Yes and swirl flow generation section having a groove or projection to generate a swirling flow in the flow of hot water or water provided, the introduction passage before Kiyu or water, from the hot water inlet or water inlet It has an axial flow path following a centripetal flow path toward the center side of the valve case, and the swirl flow generating portion has a tapered shape that is inclined in the downstream direction with respect to the axial direction of the valve case. A taper-shaped projecting piece projecting from the inner surface of the valve case toward the axial flow path is provided, and the groove is provided on the inner surface of the projecting piece.

According to the second aspect of the present invention, (a) a hot water inlet and a water inlet provided in the valve case so as to be separated from each other in the axial direction, and (b) separated from each other in the axial direction corresponding to the hot water inlet and the water inlet. A valve body provided with a hot water side valve portion and a water side valve portion provided inside the valve case so as to be movable in the axial direction; and (c) hot water and water independently of the hot water inlet, Hot water to be introduced from the inlet toward the hot water joint in the valve case, a water introduction path, (d) a mixing chamber for mixing hot water, and (e) a shaft in response to the mixed water temperature in the mixing chamber. A temperature sensing element that automatically expands and contracts in the direction and automatically adjusts the position of the valve element; and (f) a bias spring that biases the valve element in a direction in which the temperature sensing element contracts. The opening of the hot water inlet is increased by one movement in the axial direction, and the opening of the water inlet is changed small, and the opening of the hot water inlet is increased by moving the valve body in the reverse direction. In addition, in the hot and cold water mixing valve that changes the inflow ratio of hot water and water by greatly changing the opening degree of the water inlet, the valve case or / and the and / or the The valve body is provided with a swirling flow generating portion having a groove or a ridge that generates a swirling flow in the flow of hot water or water, and inside the hot water side valve portion or the water side valve portion having a cylindrical shape in the radial direction. Is provided with a reinforcing plate extending in the axial direction of the valve case, and the reinforcing plate is provided with a groove for generating a swirling flow in the flow of hot water or water passing through the reinforcing plate.

Effects and effects of the invention

As described above, the present invention generates a swirling flow in the flow of hot water or water in the hot water or water introduction path through which hot water or water is introduced from the hot water inlet or the water inlet toward the junction of hot water in the valve case. which it was provided handed circumfluence generating unit Ru is, according to the present invention, water and a water in the mixing chamber can be stirred and mixed sufficiently uniformly, hot and cold water mixing valve despite fluctuations in the supply water pressure and hot water pressure Therefore, the actual temperature of the discharged water can be adjusted to the target temperature with high accuracy.

In particular, the present invention is characterized in that a swirling flow is generated in hot water or water at a stage before hot water and water merge inside the valve case, that is, upstream thereof.
It is also possible to generate a swirling flow for the mixed water flow after the hot water and water have merged. In this case, the swirling motion is the same while the hot water and water remain in a non-uniform mixed state. As a result, the efficiency of stirring with hot water and water is not necessarily sufficiently increased.
However, in the present invention, mixing and stirring of hot and cold water is performed by causing the hot water and water, which are moving differently at the time of merging, to collide with each other by generating a swirling flow independently in at least one flow of hot water and water. Can be performed efficiently.

In the claims 1 In this case, the introduction path, without to have an axial flow path following the directed flow path toward the center of the valve case, and a swirl flow generation section, in the axial direction of the valve casing On the other hand, it has a tapered shape inclined in the downstream direction and has a protruding piece protruding from the inner surface of the valve case toward the axial flow path, and the groove is provided on the inner surface of the protruding piece. In this way, hot water can be mixed with high efficiency by generating a swirling flow.

While in claim 2, the reinforcing plate is provided inside the hot water inlet valve portion or the water-side valve portion forms a tubular shape, a groove for generating a swirling flow in the flow of hot water or water to pass through the reinforcing plate Therefore, according to the second aspect , mixing of hot and cold water can be promoted.

Next, embodiments of the present invention will be described in detail with reference to the drawings.
In FIG. 1, 10 is a hot water mixing valve with an automatic temperature control function of this embodiment (thermostat type), and 12 is a valve case having a cylindrical shape.
The valve case 12 has a first member 12-1 and a second member 12-2, which are screwed in the axial direction.
Here, the first member 12-1 and the second member 12-2 are watertightly sealed by an O-ring 14 having elasticity as a seal member.

A water inlet 16 and a hot water inlet 18 are formed in the valve case 12 at positions separated from each other in the axial direction, and water and hot water flow into the valve case 12 through the water inlet 16 and the hot water inlet 18. It has become.
A valve body 20 is provided inside the valve case 12 so as to be movable in the left-right direction (axial direction) in the figure.
The valve body 20 includes a water side valve portion 22 and a hot water side valve portion 24 that are provided apart in the axial direction, and a connecting portion 26 that connects them in the axial direction.

  Here, each of the water side valve portion 22 and the hot water side valve portion 24 has a cylindrical shape, and seal members 23 and 25 having a U-shaped cross section are held at the axially intermediate positions of the outer peripheral surfaces thereof. The water-side valve portion 22 and the hot water-side valve portion 24 and the valve case 12 are sealed in a water-tight manner by the seal members 23 and 24.

The connecting portion 26 is configured integrally with the hot water side valve portion 24.
As shown in FIG. 3, the connecting portion 26 includes a plurality of (here, four) reinforcing plates 28 that extend radially from the central portion so as to form a cross shape at the inner position of the hot water side valve portion 24, It integrally has a cylindrical portion 30 protruding from the reinforcing plate 28 in the axial direction and in the right direction in the figure.
Here, the reinforcing plate 28 functions to reinforce the hot water side valve portion 24 from the inside, the plate surface extends in the axial direction, and the outer peripheral end is integrated with the hot water side valve portion 24.
In this embodiment, water and hot water flowing in from the water inlet 16 and the hot water inlet 18 flow leftward in FIG. 1 and are mixed in the mixing chamber 34, and the mixed water flows out leftward in the figure from the outflow portion 36.

A coil-shaped temperature sensitive spring 38 made of a shape memory alloy is accommodated in the mixing chamber 34, and its urging force is directed rightward in the drawing with respect to the valve body 20, that is, the hot water side valve portion 24 is closed, and the water side. It exerts in the direction of opening the valve part 22.
The temperature-sensitive spring 38 made of shape memory alloy expands and contracts in accordance with the mixed water temperature inside the mixing chamber 34, and changes the urging force in the right direction in the drawing so that the mixed water temperature becomes the set temperature. Automatically fine-tune the position.

  A spring receiver 40 forms a mixing chamber 34 and abuts one end of a temperature-sensitive spring 38, and has an outward engaging claw 42 at the right end in the figure. The engaging claw 42 is connected to the first member 12-1. The first member 12-1 is assembled in a state of being engaged with the engagement hole 44.

The water side valve portion 22 is configured separately from the hot water side valve portion 24 and the connecting portion 26.
As clearly shown in FIG. 2, the water side valve portion 22 is formed with a cylindrical fitting portion 46 having a stepped shape on the inner side, and the fitting portion 46 is a stepped portion. The cylinder 48 is fitted and assembled to the cylindrical portion 30 in a state in which 48 is brought into contact with the distal end surface of the cylindrical portion 30.
Specifically, an internal thread portion 32 is formed inside the cylindrical portion 30, and an external thread portion 50 formed at the distal end portion of a later-described valve shaft 98 is screwed therein.

A retaining ring (here, E-ring) 52 as a pressing member is attached to the valve shaft 98, and the male threaded portion 50 of the valve shaft 98 is screwed into the female threaded portion 32 inside the cylindrical portion 30. The valve portion 22 is pressed against the cylindrical portion 30 to the left in the figure via a spring 54 by a retaining ring 52 and is fixedly assembled to the connecting portion 26.
Here, the spring 54 is made of a normal metal and has a coil shape.

  As shown in FIG. 1, the valve case 12 is provided with a water side valve seat 56 and a hot water side valve seat 58 at axially inner positions of the water side valve portion 22 and the hot water side valve portion 24. The water side valve portion 22 and the hot water side valve portion 24 are in contact with each other in the axial direction.

In this embodiment, the valve body 20 is biased leftward in the drawing by the bias spring 60, that is, in a direction to open the hot water side valve portion 24 and close the water side valve portion 22, and the mixing chamber 34. A temperature-sensitive spring 38 provided in the inside is biased in the opposite direction to the right in the figure, that is, in the direction in which the hot water side valve portion 24 is closed and the water side valve portion 22 is opened.
The valve body 20 is held at a position where the rightward biasing force of the temperature-sensitive spring 38 in the drawing balances the leftward biasing force of the bias spring 60.

As shown in FIG. 1, a rotation operation shaft 61 is assembled to the valve case 12.
The rotation operation shaft 61 is used for setting the mixed water temperature by moving the valve body 20 in the valve case 12 in the axial direction, that is, in the horizontal direction in the figure. The fitting shaft portion 62 is rotatably fitted in the fitting hole 66 of the valve case 12.
Here, the fitting shaft portion 62 and the fitting hole 66 of the valve case 12 are sealed in a watertight manner by an O-ring 68.
Further, a handle (not shown) in the serration portion 70 is connected to the handle connection portion 64 protruding to the right in the axial direction from the valve case 12 in an integrally rotated state.

The rotary operation shaft 61 has a large-diameter cylindrical portion 72 inside the valve case 12, and is elastic in the radial direction attached to the rotary operation shaft 61 and the shoulder portion at the right end of the cylindrical portion 72 in the drawing. The retaining ring 74 is fixed to the valve case 12 in the axial direction.
A female screw portion 78 is formed on the inner peripheral surface of the cylindrical portion 72, and a cylindrical driving member 80 is screwed to the male screw portion 82 on the outer peripheral surface.
The drive member 80 is moved forward and backward in the axial direction, that is, in the left-right direction in the figure by screw feed by the rotation operation of the rotation operation shaft 61.

Between the drive member 80 and the valve body 20, the above-described bias spring 60 made of a normal metal coil spring is interposed via a stopper ring 84 and a spring receiver 86. A middle leftward biasing force is exerted on the valve body 20 leftward in the figure.
The spring receiver 86 is provided with inward flange portions 88 and 90 at the left end and the right end in the drawing.

On the other hand, the drive member 80 is provided with an outward flange portion 92 at the left end in the drawing, and this outward flange portion 92 is arranged between the pair of flange portions 88 and 90 in the left-right direction in the drawing. Relative movement is possible.
Further, the drive member 80 is provided with a stepped portion 94 projecting inward at the right end in the figure, and a stopper ring 84 is brought into contact with the right side in the figure.

A valve shaft 98 extends from the valve body 20 to the right in the drawing.
The right end side of the valve shaft 98 penetrates the stopper ring 84 and protrudes rightward in the figure, and a head 96 having a diameter larger than the inner diameter of the stopper ring 84 is provided at the protruding end.
The head 96 is provided with an engaging groove that becomes a tool hook when the male threaded portion 50 of the valve shaft 98 is screwed into the female threaded portion 32 of the connecting portion 26.

In this embodiment, when the rotation operation shaft 61 is rotated in the forward direction, the drive member 80 is advanced to the left in the figure by a screw feed action, and thereby the bias spring 60 is compressed via the stopper ring 84 and the valve The urging force toward the left in the figure with respect to the body 20 is increased.
Further, when the rotation operation shaft 61 is rotated in the reverse direction, the drive member 80 is moved backward in the right direction in the figure, and the bias spring 60 is displaced in the extending direction, so that the urging force in the left direction in the figure is weakened. .

  In the hot and cold water mixing valve 10 of this embodiment, by rotating the rotation operation shaft 61 in the forward direction or the reverse direction in this way, the valve body 20 is biased to the left in the figure by the bias spring 60 and the temperature sensitive spring. It is shifted in the left-right direction to a position where the rightward biasing force in FIG. That is, the temperature of the mixed water in the hot / cold water mixing valve 10 is set or changed.

Specifically, in this hot water / water mixing valve 10, the valve body 20 moves to the left in the drawing to the full position, and the water side valve portion 22 contacts the water side valve seat 56, whereby the water inlet 16 is fully closed and the hot water inlet 18 is When the valve body 20 is fully opened in the reverse direction and the hot water side valve portion 24 comes into contact with the hot water side valve seat 58, the hot water inlet 18 is fully closed and the water inlet 16 is fully opened.
Further, the water inlet 16 and the hot water inlet 18 are opened at an intermediate position between them, and the opening degree thereof is automatically changed based on the temperature sensing of the temperature sensing spring 38 to change the inflow amount of water and hot water to change the mixed water. The temperature is automatically adjusted to the set temperature.

  As shown in FIG. 1, the hot water / water mixing valve 10 of this embodiment introduces water from the water inlet 16 toward the junction with the hot water from the hot water inlet 18 following the water inlet 16. Following the passage 100 and the hot water inlet 18, there is a hot water introduction passage 102 for introducing the hot water from the hot water inlet 18 toward the junction with the water from the water inlet 16.

Here, the water introduction path 100 includes a centripetal flow path 100-1 for circulating and guiding water from the water inlet 16 toward the center side of the valve case 12, and an axial flow path 100-2 following this. And have.
Here, the axial flow path 100-2 is formed on the outer peripheral side of the cylindrical portion 30 in the connecting portion 26.

On the other hand, the hot water introduction path 102 is composed of a flow path in the centripetal direction through which hot water from the hot water inlet 18 is circulated toward the center side of the valve case 12.
That is, in this embodiment, the water flowing in from the water inlet 16 flows in the centripetal direction toward the center of the valve case 12 through the flow path 100-1, and then flows in the axial direction flow path 100-2 to the left in the figure. The hot water introduced in the hot water introduction path 102 joins and flows into the mixing chamber 34.

  As shown in the partially enlarged view of FIG. 1, the hot water introduction passage 102 has a tapered inclined passage 102 a that is inclined downstream with respect to the axial direction of the valve case 12. The inclined path 102 a is formed by the inner surface of the hot water side valve portion 24 and the outer surface in the radial direction of the nozzle portion (projecting piece) 104 protruding from the valve case 12.

Specifically, the right side of the hot water side valve portion 24 in the drawing, that is, the inner surface of the hot water side valve seat 58 side, is a tapered surface 108 that moves to the downstream side of the left side in the drawing as it proceeds in the center direction of the valve case 12.
The nozzle portion 104 is also tapered in the same direction, and the tapered surface of the tapered shape is formed by a tapered surface 110 inclined in the same direction as the tapered surface 108 of the hot water side valve portion 24 on the outer surface thereof. 102a is formed.
The inner surface of the nozzle portion 104 is also a tapered surface 112 that is inclined in the same direction.
Hot water that flows in from the hot water inlet 18 flows toward the center of the valve case 12 through the ramp 102a.
As is clear from the above description, in this example, the hot water side valve portion 24 itself forms a part of the hot water introduction path 102.

As shown in FIGS. 3 and 4, the tapered surface 108 of the hot water side valve portion 24 has a spiral groove (groove extending in the spiral direction) 114 that generates a swirling flow in the hot water flowing through the introduction path 102. A plurality are formed at equal intervals in the circumferential direction.
That is, in this embodiment, a part of the hot water side valve portion 24 constitutes a swirl flow generating portion having the spiral groove 114.
Further, a groove 116 for maintaining the swirling flow generated in the spiral groove 114 is formed in the reinforcing plate 28 inside the hot water side valve portion 24.
Here, the groove 116 extends in the axial direction, and the groove depth and the groove width become larger toward the downstream side.
These grooves 116 reach the shaft end of the reinforcing plate 28, and both the groove depth and the groove width are maximum at the shaft end.
The nozzle portion 104 provided on the valve case 12 side functions to squeeze the water flow toward the mixing chamber 34.

FIG. 5 shows the action of the spiral groove 114 provided on the tapered surface 108 of the hot water side valve portion 24 and the groove 116 provided on the reinforcing plate 28.
As shown in the figure, the hot water flowing in from the hot water inlet 18 is in the process of flowing through the introduction path 102 that follows, and more specifically in the process of flowing through the inclined path 102a that forms part of the hot water side valve section 24. A swirling flow is generated in the flow by the guiding action of the spiral groove 114 formed in the tapered surface 108 on the inner surface.
When the generated swirl flow passes through the reinforcing plate 28 formed inside the hot water side valve portion 24, the swirl flow may be weakened there. In this embodiment, the swirl flow is maintained in the reinforcing plate 28. Since the groove 116 is formed, the generated swirling flow passes through the reinforcing plate 28 while maintaining this, and flows into the mixing chamber 34.

Thus, since the swirling flow is generated in the hot water flowing out from the introduction path 102, the flow of water flowing in the axial direction and joining the hot water flow and the flow of hot water are efficiently mixed, and the mixing chamber 34 is obtained. Inflow.
The swirl flow is also maintained in the mixing chamber 34, and the mixing of water and hot water is performed well in the mixing chamber 34.
Here, the width and the depth of the groove 114 of the hot water side valve portion 24 and the groove 116 of the reinforcing plate 28 may be smaller as it goes downstream, or may be constant.

Instead of providing the spiral groove 114 on the tapered surface 108 of the hot water side valve portion 24, a similar spiral groove 114 is formed on the outer tapered surface 110 of the nozzle portion 104, or on both of them. It is also possible to form 114.
Furthermore, it is possible to provide a spiral protrusion instead of the spiral groove 114.
Further, here, the reinforcing plate 28 is provided with the axial groove 116, but in some cases, the shape of the reinforcing plate 28 is maintained or the shape is changed to a shape having a cylindrical portion or the like, It is also possible to provide a spiral or other groove that serves to generate a swirling flow with respect to the flow passing therethrough.

  According to the present embodiment as described above, hot water and water can be sufficiently stirred and mixed in the mixing chamber 34, and the temperature control operation by the hot water mixing valve 10 can be performed regardless of fluctuations in the supply water pressure or the hot water supply pressure. It can be performed accurately, and the actual water discharge temperature can be adjusted to the target temperature with high accuracy.

  In the present embodiment, it is not necessary to separately add a special member for generating the swirling flow, and therefore, the number of steps for assembling the parts is not particularly increased, and the hot and cold mixing valve 10 can be configured at a low cost as a whole. Has the advantage of being able to.

In the present invention, it is also possible to provide a spiral groove 114 on the tapered surface 112 of the inner surface of the nozzle portion 104 as shown in FIG. In this case, a swirling flow is generated by the spiral groove 114 provided on the tapered surface 112 of the inner surface of the nozzle portion 104 with respect to the water flowing through the water introduction path 100.
In this case, immediately after the swirling flow is generated in the water flow, the hot water flows are combined, and further, the location where the swirling flow is generated is close to the mixing chamber 34. The advantage that mixing of water and hot water is efficiently performed is obtained.

FIG. 7 shows a reference example .
In this example, the hot water / water mixing valve 118 has the water inlet 16 and the hot water inlet 18 arranged in the opposite direction from FIG. 1, and the water side valve seat 56 and the hot water side valve seat 58 are connected to the water side valve portion 22 and the hot water side valve. This is an example in which the valve body 20 is arranged in an axially outer position with respect to the portion 24 and is biased in the opposite direction by the temperature-sensitive spring 38 and the bias spring 120.

In this example, the rotation operation shaft 61 has a male screw shaft 122 inside the valve case 12, and a female screw portion 126 on the inner peripheral surface of the drive member 80 is screwed to a male screw portion 124 on the outer peripheral surface thereof. .
Therefore, also in this example , by rotating the rotation operation shaft 61, the drive member 80 is moved back and forth in the left-right direction in the figure, and thereby the biasing force of the bias spring 120 in the left direction in the figure is changed strongly or weakly. .

The hot water side valve portion 24 and the valve case 12 are formed with tapered surfaces 128 and 130 which are inclined with respect to the axial direction of the valve case 12, and the tapered surfaces 128 and 130 form a part of the hot water introduction path 102. A tapered inclined path 102a is formed.
In addition, tapered surfaces 132 and 134 that are inclined in the direction opposite to the side of the hot water side valve portion 24 are also formed in corresponding portions of the water side valve portion 22 and the valve case 12, thereby forming the water introduction path 100. A taper-shaped ramp 100a forming a part is formed.

Thus, as shown in FIG. 8, spiral grooves 114 similar to those shown in FIG. 3 are formed on the tapered surfaces 128 and 132 of the hot water side valve portion 24 and the water side valve portion 22 in the circumferential direction. A plurality are provided at equal intervals.
In addition, the groove | channel 114 of the hot water side valve part 24 and the groove | channel 114 of the water side valve part 22 have comprised the spiral shape in the same direction in the same axial direction view.
In this example , the hot water side valve portion 24 and the water side valve portion 22 themselves constitute a swirl flow generating portion.

In this example , the cylindrical portion 136 that partitions and forms the water chamber 139 that communicates with the water inlet 16 between the valve case 12 and the valve body 20 so that the inner surface of the valve case 12 slides integrally with the valve body 20. The urging force of the temperature sensitive spring 38 is exerted on the cylindrical portion 136 in the right direction in the figure.
The cylindrical portion 136 has a large-diameter portion 138 that slides on the inner surface of the valve case 12, and a small-diameter portion 140 between the large-diameter portion 138 and the valve body 20, as shown in FIG. A spiral through-hole (oblique hole) 142 having a shape inclined with respect to the radial direction is formed in the small-diameter portion 140 so as to generate a swirl flow that penetrates the small-diameter portion inward and outward.

In this example , the water flowing in from the water inlet 16 merges with the hot water when it passes through the through hole 142. Therefore, in this example , the water introduction path 100 is configured from the water inlet 16 to the inner peripheral end of the through hole 142.
Here, each of the through holes 142 has a shape inclined with respect to the radial direction. Therefore, the flow of water flowing inward through the through holes 142 is also used to generate a swirling flow by the through holes 142. Force acts.
That is, in this example , the cylindrical part 136 also constitutes a swirl flow generating part.

In this example , both the hot water flowing in from the hot water inlet 18 and the water flowing in from the water inlet 16 are swirled in the course of flowing through the respective introduction paths 102 and 100, and are separately swirled. The flow of hot water and the flow of water merge at the junction and flow into the mixing chamber 34.
Even in this case, water and hot water are mixed in the mixing chamber 34 while generating a swirling flow.
Accordingly, even in the example , mixing of water and hot water is performed with high efficiency, so that water and hot water are mixed uniformly, so that the temperature-sensitive spring 38 can be expanded and contracted accurately corresponding to the ratio of the inflow amount of water and hot water. Then, temperature control operation is performed.

In this example , the spiral groove 114 may be formed on the tapered surfaces 130 and 134 on the valve case 12 side instead of the valve body 20 side, and the tapered surface 128 of the valve body 20 may be formed. , 132 and the tapered surface 130, 134 of the valve case 12 can be formed with a spiral groove 114. Further, the groove 114 of the hot water side valve portion 24 and the groove 114 of the water side valve portion 22 may have a spiral shape in opposite directions when viewed in the same axial direction. It is also possible to provide a spiral ridge instead of the groove.

The embodiment of the present invention has been described in detail with reference examples . However, this is merely an example, and the present invention can be configured in various modifications without departing from the spirit of the present invention.

It is sectional drawing of the hot and cold water mixing valve which is one embodiment of the present invention. It is a figure which decomposes | disassembles and shows the principal part in the embodiment. It is a figure of the principal part of the valve body in the embodiment. It is side surface sectional drawing of the hot water side valve part of FIG. It is operation | movement explanatory drawing of the embodiment. It is a figure of the principal part of other embodiment of this invention. It is a figure of the hot water mixing valve of a reference example . It is a single-piece figure of the valve body in the example of FIG. It is a figure of the cylindrical part in the example of FIG. It is a figure which shows an example of the conventional hot water mixing valve.

DESCRIPTION OF SYMBOLS 10 Hot water mixing valve 12 Valve case 16 Water inlet 18 Hot water inlet 20 Valve body 22 Water side valve part 24 Hot water side valve part 28 Reinforcement plate 34 Mixing chamber 38 Temperature sensitive spring 60 Bias spring 100,102 Introductory path 100-1,100 -2 Channel 100a, 102a Ramp 104 Nozzle (projection piece)
114 groove 116 groove 118 hot water mixing valve 142 through hole

Claims (2)

(A) A hot water inlet and a water inlet provided in the valve case in an axial direction, and (b) a hot water side valve portion provided in an axial direction corresponding to the hot water inlet and the water inlet. And a valve body provided in the valve case so as to be movable in the axial direction, and (c) hot water and water independently from the hot water inlet and from the water inlet to the inside of the valve case. The hot water, the water introduction path introduced toward the junction of the hot water and the water, (d) the mixing chamber for mixing hot water, and (e) the valve expands and contracts in the axial direction in response to the temperature of the mixed water in the mixing chamber. A temperature sensing body that automatically adjusts the position of the body, and (f) a bias spring that biases the valve body in a direction in which the temperature sensing body contracts, and one movement in the axial direction of the valve body The opening degree of the hot water inlet is increased, the opening degree of the water inlet is changed small, and the opening degree of the hot water inlet is reduced by moving the valve body in the reverse direction. In a hot and cold water mixing valve that changes the inflow ratio of hot water and water by greatly changing the opening, hot water or water is introduced into the hot water or water introduction path and the valve case or / and the valve body forming the introduction path. Yes and swirl flow generation section having a groove or projection to generate a swirling flow in the flow provided,
Before Kiyu or introduction passage of water, which has an axial flow path from the hot water inlet or water inlet Following centripetal direction of the flow path toward the central side of the valve casing, the swirl flow generation section Has a taper-shaped protruding piece that is inclined in the downstream direction with respect to the axial direction of the valve case and protrudes from the inner surface of the valve case toward the axial flow path, and the inner surface of the protruding piece The hot water mixing valve is provided with the groove. (A) A hot water inlet and a water inlet provided in the valve case in an axial direction, and (b) a hot water side valve portion provided in an axial direction corresponding to the hot water inlet and the water inlet. And a valve body provided in the valve case so as to be movable in the axial direction, and (c) hot water and water independently from the hot water inlet and from the water inlet to the inside of the valve case. The hot water, the water introduction path introduced toward the junction of the hot water and the water, (d) the mixing chamber for mixing hot water, and (e) the valve expands and contracts in the axial direction in response to the temperature of the mixed water in the mixing chamber. A temperature sensing body that automatically adjusts the position of the body, and (f) a bias spring that biases the valve body in a direction in which the temperature sensing body contracts, and one movement in the axial direction of the valve body The opening degree of the hot water inlet is increased, the opening degree of the water inlet is changed small, and the opening degree of the hot water inlet is reduced by moving the valve body in the reverse direction. In a hot and cold water mixing valve that changes the inflow ratio of hot water and water by greatly changing the opening, hot water or water is introduced into the hot water or water introduction path and the valve case or / and the valve body forming the introduction path. Yes and swirl flow generation section having a groove or projection to generate a swirling flow in the flow provided,
The radially inward of the hot water inlet valve portion or the water-side valve portion forms a cylindrical Yes in reinforcing plate provided to extend in the axial direction of the valve case, the reinforcing plate, hot or water passing through the reinforcing plates A hot water / water mixing valve is provided with a groove for generating a swirling flow in the flow of the water.

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