JPH0842744A - Hot water and water mixing device - Google Patents

Abstract

PURPOSE:To suppress the generation of an abnormal sound giving an uncomfortable feeling at the mixing operation of high temperature water and low temperature water. CONSTITUTION:In a hot water and water mixing device 10B, a movable valve body 160B is slid by the balance between a temperature sensitive spring 130 exposed to a mixed hot water and a bias spring 150. The temperature sensitive spring 140 moves the position of the movable valve body 160B by the change of the spring constant according to the temperature of the mixed hot water, whereby the mixing ratio between high temperature water and low temperature water flowing out from a hot water-side port 116 and a water-side port 106 is changed. A spring receiving member 210B for supporting the bias spring 150 has a guide passage 175B for guiding the hot water from the hot water-side port 116 to a passage part 172B formed so as to bypass the bias spring 150. Thus, since no hot water pass the narrow part between the windings of the bias spring 150, an abnormal sound caused according to a sudden increase in passage area is never generated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot and cold water mixing device,
More specifically, the present invention relates to a hot and cold water mixing device that biases a movable valve element to mix hot and cold water using a spring made of a material whose spring constant changes with temperature.

[0002]

2. Description of the Related Art Conventionally, as this kind of hot and cold water mixing apparatus, an automatic temperature control system for controlling the temperature of the mixed hot and cold water constantly by energizing a movable valve element using a shape memory alloy whose shape changes with temperature A hot and cold water mixing valve has been proposed (Jitsuko Sho 61-44062). This is because when the shape memory alloy is set to a certain shape at a specific temperature, it will be restored to the shape at the time of setting when the initial setting temperature is given even if the shape is physically changed at other temperatures. This is the feature that is used. A spring using a shape memory alloy in such a device has a smaller heat capacity than wax thermos,
It has the feature that it operates sensitively to temperature changes.

[0003]

In the hot and cold water mixing device, one end of the movable valve element is biased by the temperature sensitive spring, and the other end of the movable valve element is in the direction opposite to the biasing direction of the temperature sensitive spring. The movable valve element is moved by urging it with a bias spring. As a result, the ratio of the opening area of the hot water port and the water side port provided on both sides of the movable valve body is changed, that is, the mixing ratio of the high temperature water flowing out from the hot water port and the low temperature water flowing out from the water side port is changed. By changing the temperature, the water discharge temperature of the mixed hot water is adjusted to a predetermined temperature. However, the hot and cold water mixing device has a problem that an abnormal noise that causes discomfort is generated during the mixing operation of the high temperature water and the low temperature water.

An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a hot and cold water mixing apparatus which does not generate an unpleasant noise when mixing high temperature water and low temperature water. The purpose is to

[0005]

In order to solve the above-mentioned problems, the invention of claim 1 is a hot and cold water mixing apparatus for mixing hot water and low temperature water to discharge hot and cold water having a target set temperature. A casing body having a hot water side port for discharging water and a cold water side water port, and a sliding hole communicating with the both ports, and a slidably fitted into the sliding hole. Adjusting the mixing ratio of high-temperature water discharged from the port and low-temperature water discharged from the water side port, and a movable valve element having a valve body channel inside which the high-temperature water or low-temperature water passes, and a predetermined temperature Made of a material whose spring constant changes in accordance with the temperature in the range, and a temperature-sensitive spring for urging the movable valve body in the direction of decreasing the proportion of the hot water as the temperature of the mixed hot water rises, and the movable valve body in the above direction. Biasing force in the direction opposite to A guide for forming a guide flow path in at least one of the ass spring and the hot water side port or the water side port, which guides high-temperature water or low-temperature water to the valve body channel of the movable valve body by bypassing the bias spring or the temperature sensitive spring. And a flow path forming member.

According to a second aspect of the present invention, in the first aspect, a bias spring receiving member for receiving the bias spring is provided, and the guide flow path forming member is provided on the bias spring receiving member.

According to a third aspect of the present invention, in a hot and cold water mixing apparatus for mixing hot water and low temperature water to discharge hot and cold water having a target set temperature, a hot water side port for discharging high temperature water and a water side for discharging low temperature water. A casing body having a port and a sliding hole communicating with the both ports, and a high temperature water discharged from the hot water side port and discharged from the water side port, which are slidably fitted in the sliding hole. A movable valve body having a valve body flow passage through which the high-temperature water or the low-temperature water is passed while adjusting the mixing ratio with low-temperature water, and a material whose spring constant changes depending on the temperature in a predetermined temperature range, A temperature sensitive spring for urging the movable valve body in a direction in which the proportion of the hot water is reduced as the temperature of the mixed hot water rises; and a bias spring for urging the movable valve body in a direction opposite to the direction, Is the movable valve disc on the outer periphery? Toward the inner periphery, and having a guide surface which gradually widen the flow path area of the hot water side ports or water-side port leads to the hot water or cold water to the valve body passage.

According to a fourth aspect of the present invention, the hot water port and the mixing chamber for communicating the low temperature water or the mixing chamber communicating with the water port and the inflow amount of the high temperature water and / or the low temperature water discharged from the both ports are controlled. , And a movable valve body having a valve body flow passage through which the high temperature water or the low temperature water is passed, while adjusting the mixing ratio of the high temperature water and the low temperature water, and the high temperature water and the low temperature water mixed in the mixing chamber. Of the temperature sensitive spring whose spring constant changes according to the temperature of the mixed hot and cold water, a driving means for driving the movable valve body in proportion to the biasing force of the temperature sensitive spring, and the driving means. The bias spring that presses the movable valve body in the direction opposite to the driving direction of the movable valve body, and at least one of the hot water side port and the water side port bypasses the bias spring with high-temperature water or low-temperature water, and the valve body flow passage of the movable valve body. Forming a guide channel leading to the Characterized in that it comprises a flow path forming member.

[0009]

In the hot and cold water mixing apparatus according to the first aspect of the present invention, the movable valve body slides in the sliding hole of the casing body to mix hot water and low temperature water discharged from the hot water port and the hot water port. Change the ratio. The movable valve body is biased by the temperature sensitive spring and biased in the opposite direction by the bias spring. The temperature-sensitive spring changes its spring constant according to the temperature of the mixed hot water,
Since the movable valve body is moved to a position in balance with the spring force of the bias spring, the mixed hot and cold water adjusted to the target temperature is discharged.

The guide passage forming member is formed so as to bypass the bias spring or the temperature sensitive spring from the hot water side port or the water side port to the guide passage connected to the valve body passage of the movable valve body. Therefore, high-temperature water and low-temperature water do not pass through the narrow portion between the windings of the temperature-sensitive spring and the bias spring, so that no abnormal noise is generated due to the rapid increase of the flow passage area.

According to a second aspect of the present invention, a bias spring receiving member for receiving the bias spring is provided, and the guide flow passage forming member according to the first aspect is provided on the bias spring receiving member, whereby the guide flow passage forming member is provided. It is compactly constructed near the bias spring.

In the present invention, since the movable valve body is provided with the guide surface, the guide surface gradually increases the flow passage area of the hot water port or the water side port toward the flow passage in the valve body. There is no abrupt change in the flow path area, and no abnormal noise that causes discomfort is generated.

Further, according to the invention of claim 4, the hot water mixing device is movable by converting the change of the spring constant of the temperature sensitive spring into the moving force of the movable valve body by the driving means constituted by an electromagnetic solenoid or a motor. It is applied to the one that changes the mixing ratio of high temperature water and low temperature water by sliding the valve body. In this case, since the temperature-sensitive spring is sensitive to the temperature of the mixed hot water, it exhibits excellent responsiveness in temperature control of the mixed hot water.

[0014]

Preferred embodiments of the present invention will be described below in order to further clarify the structure and operation of the present invention described above.

FIG. 1 is a sectional view showing a hot and cold water mixing apparatus 10 according to an embodiment of the present invention. In FIG. 1, the hot and cold water mixing device 10 includes an outer casing 20, an inner casing 30 housed in the outer casing 20, an operation handle 40 attached to an end portion of the outer casing 20,
Casing body 50 housed in inner casing 30
And

The casing main body 50 is provided with a chamber for accommodating a valve mechanism described later, that is, the hot and cold water mixing chamber 80, the hot water inflow chamber 90, and the slide chamber 96 in order from the right side in the drawing.
It has. A water side valve seat member 70 sealed by an O-ring is fitted into the hot and cold water mixing chamber 80. The water side valve seat member 70 includes a water side valve seat 108 having a water side port 106.
Are formed. The water side port 106 is connected to the water introduction flow passage 102 formed between the outer casing 20 and the inner casing 30. On the other hand, the casing body 50 has a hot water flow path 11 connected to a hot water supply device (not shown).
4 is formed, and a hot water valve seat 118 having a hot water port 116 connected to the hot water flow path 114 is also formed.

In the hot water inflow chamber 90, the movable valve body 16 is attached to or detached from or separated from the water side valve seat 108 and the hot water side valve seat 118.
0 is slidably fitted. This movable valve body 160
Receives the spring force of the temperature-sensitive spring 130 housed in the hot and cold water mixing chamber 80 and the bias force of the bias spring 150, and its position is determined by the balance of these spring forces. The temperature-sensitive spring 130 is installed between the spring receiving member 180 supported by the water side valve seat member 70 and the spacer 190. The temperature-sensitive spring 130 is made of metal whose spring constant changes with temperature, and the bias spring 150 is made of a normal spring material having a constant spring constant with respect to temperature.

The preload adjusting mechanism 200 includes the bias spring 1
The target temperature of the mixed hot water is changed by adjusting the preload of 50. By rotating the operation handle 40, the spring receiving member 210 is advanced and retracted via the slide mechanism 250, whereby the bias spring 150 is moved. The preload of increases or decreases. Depending on the increase / decrease in preload, the bias spring 15
The movable valve body 160 is displaced to a position where the spring force of 0 and the spring force of the temperature sensitive spring 130 are balanced, and the target temperature is changed.

Next, the temperature adjusting operation of the hot and cold water mixing apparatus 10 will be described. Now, when the conditions such as the hot water supply temperature from the water heater, the tap water temperature or the flow rate are in a steady state and the mixed hot water is spouting at the target temperature, the movable valve body 160 is operated by the mixed hot water in the hot water mixing chamber 80. The position is determined by the balance between the force generated in the temperature-sensitive spring 130 and the spring force of the bias spring 150, and the temperature-sensitive spring 130 is stationary. From this state, if conditions such as the hot water supply temperature from the water heater, the tap water temperature, or the flow rate fluctuate due to disturbance, the mixed hot and cold water temperature in the hot and cold water mixing chamber 80 deviates from the target temperature according to this fluctuation, and a temperature deviation occurs. The temperature-sensitive spring 130 changes the spring constant according to this temperature change, and as a result, the temperature-sensitive spring 130.
The spring force of changes. At this time, when the temperature of the mixed hot water is higher than the target temperature, the spring force of the temperature sensitive spring 130 increases, and the movable valve body 160 is displaced rightward in FIG. 1 while increasing the preload of the bias spring 150. , The proportion of hot water decreases and the temperature of mixed hot and cold water decreases.

On the other hand, when the temperature of the mixed hot and cold water is lower than the target temperature, the spring force of the temperature sensitive spring 130 decreases and the action of the bias spring 150 allows the movable valve body 160 to be displaced leftward in FIG. Therefore, the proportion of hot water increases and the proportion of water decreases at the same time, and the temperature of the mixed hot water rises. The temperature of the mixed hot water is adjusted toward the target temperature by the action of the temperature sensitive spring 130.

In the hot and cold water mixing apparatus 10 having such a configuration, the preload adjusting mechanism 20 is used to change the target temperature.
This is performed by rotating the operation handle 40 that constitutes a part of 0 in a predetermined direction. That is, when the operation handle 40 is rotated in a predetermined direction, the spring receiving member 210 moves leftward in FIG. 1 via the slide mechanism 250, and the bias spring 150 is compressed and displaced, and the bias spring 150 pre-displaces the movable valve body 160. The load increases. On the other hand, when the operation handle 40 is rotated in the opposite direction, the slide mechanism 250
1 is moved to the right in FIG. 1 and the bias spring 150 is stretched and displaced.
The preload on the is reduced.

By increasing the preload of the bias spring 150 as described above, the movable valve body 160 is adjusted so that the flow passage of the hot water valve seat 118 is widened and at the same time the flow passage of the water side valve seat 108 is narrowed. By changing the hot-water mixing ratio by increasing the amount of hot water and decreasing the amount of hot water, the discharge temperature of the mixed hot water becomes high, and conversely, the movable valve body 160 is reduced due to the decrease in preload.
Narrows the flow path of the hot water valve seat 118, and at the same time, the hot water valve seat 1
The temperature of the mixed hot water is adjusted to be balanced at the position where the flow passage 08 is widened to lower the water discharge temperature.

Next, the configuration and operation of each part of the hot and cold water mixing apparatus 10 will be described in more detail. First, the configuration of the movable valve body 160 will be described. In FIG. 2, the movable valve body 160 includes a tubular portion 162, water side seating portions 164 and hot water side seating portions 1 provided at both ends of the tubular portion 162.
66 and the flow path portion 1 formed on the inner peripheral portion of the tubular portion 162.
And an annular locking portion 168 having 72. The annular locking portion 168 supports the bias spring 150 at its end, and supports the spacer 190 for receiving the temperature sensitive spring 130 at the other end. In addition, the surface of the movable valve body 160 between the hot water side seat portion 166 and the flow path portion 172 is the guide surface 1
It is 74. The guide surface 174 has an annular locking portion 168 as it goes from the hot water flow passage 114 toward the flow passage portion 172.
It is formed in a curved shape inclined to the side.

The movable valve body 160 is movable by the balance between the temperature sensitive spring 130 and the bias spring 150, and when the water side seating portion 164 of the movable valve body 160 is seated on the water side valve seat 108 (state of FIG. 1), When only the hot water of the water heater is discharged, while when the hot water side seat 166 is seated on the hot water valve seat 118, only tap water (low temperature water) is discharged and both seats 164, 166 are placed.
When neither seat is seated, its water side port 1
06 and low-temperature water or high-temperature water in an amount corresponding to the flow path opening of the hot-water port 116 is discharged and mixed in the hot-water mixing chamber 80.

Next, the temperature sensitive spring 130 will be described.
As the metal material of the temperature-sensitive spring 130, an alloy belonging to the category of shape memory alloy (SMA) made of NiTi alloy can be used. The elastic coefficient of this type of SMA changes depending on the temperature, and as a result, the temperature sensitive spring 13 made of SMA is used.
The spring constant of 0 changes with temperature. The temperature-sensitive spring 130 applicable to the hot water mixing apparatus 10 has a spring load and a strain proportional to a temperature difference from a target set temperature in a use temperature range, for example, in a range of 10 to 70 ° C. It has characteristics.

The temperature-sensitive spring 130 is expanded and contracted in a strained state preloaded by the bias spring 150 to slide the movable valve body 160 within a predetermined range of stroke. FIG. 3 shows the relationship between the load and the strain of the temperature-sensitive spring 130. The solid line indicates the strain characteristic of the temperature-sensitive spring 130 with respect to each temperature, the alternate long and short dash line indicates the load characteristic of the bias spring 150 according to this embodiment, and the broken line indicates the conventional bias. This is the load characteristic of the spring. As is apparent from FIG. 3, in the related art, a large stroke STA is secured by moving the temperature sensitive spring 130 within a range where the strain is small using a bias spring having a small spring constant. Using the bias spring 150 having a large constant, the temperature-sensitive spring 130 is constantly expanded and contracted in a short stroke ST in a strained state. That is, the strain r of the temperature-sensitive spring 130 is given by the following equation (1), and its range is from 0.6% to 1.
It is used within the range of 4% to stabilize the driving of the movable valve body 160 and prevent the temperature sensitive spring 130 from being deteriorated due to the hysteresis. r = (d · ST / πnD) · 100 (%) (1) d: Wire diameter of temperature-sensitive spring 130 ST: Stroke (deflection amount) n: Number of coil turns D: Center diameter of temperature-sensitive spring 130

A spacer 190 is interposed between the movable valve body 160 and the temperature sensitive spring 130. The spacer 190 functions to sufficiently mix the high temperature water and the low temperature water and then to contact the temperature sensitive spring 130, and as shown in FIG. 2, the right support end portion 13 of the temperature sensitive spring 130.
4 and the spring receiving portion 192
From the water side port 106 between the leg portions 194, and the central portion of the spring receiving portion 192 has the through passage 1
98, respectively. The left support end portion 132 of the temperature sensitive spring 130 shown in FIG.
Is supported by the flange portion 74 of the water side valve seat member 70 via.

Next, the preload adjusting mechanism 200 will be described. As shown in FIG. 1, the preload adjusting mechanism 200 includes a spring bearing member 210 that supports the right supporting end portion 154 of the bias spring 150, and a slide mechanism 250 that moves the spring bearing member 210 in the axial direction. ing. The slide mechanism 250 includes a liner 260 fixed to the mounting recess 42 of the operation handle 40 via a latch mechanism or a click mechanism and having a male screw portion 262 on the outer peripheral portion of the other end. The spring receiving member 210 includes a body portion 212 and a body portion 2
12 and an outer peripheral support part 214 having a female screw part 217 that is integrally formed with the male screw part 262 and is screwed to the male screw part 262, and the bias spring 1 is provided between the main body part 212 and the outer peripheral support part 214.
A spring receiving portion 216 for supporting the 50 is provided, and a spline 218 is formed between the outer peripheral portion of the outer peripheral supporting portion 214 and the casing body 50.

With the configuration of the preload adjusting mechanism 200 as described above, in order to change the target temperature of the mixed hot water, the operating handle 40 is rotated in a predetermined direction by using the installation temperature display provided on the outer peripheral portion of the operating handle 40 as an index. The rotation of the operation handle 40 causes the liner 260 to rotate integrally with the operation handle 40. As a result, since the male screw portion 262 on the outer peripheral portion of the liner 260 is screwed into the female screw portion 217 of the spring receiving member 210, the rotational driving force is transmitted to the spring receiving member 210, but the spring receiving member 210. Since its rotation is restricted by the spline 218, it moves in the axial direction. By the axial movement of the spring bearing member 210, the spring bearing portion 216 displaces the bias spring 150. Due to the displacement of the bias spring 150, the movable valve body 1
By moving 60, the temperature-sensitive spring 130 is displaced to a position where the temperature-sensitive spring 130 is balanced, and the target temperature is changed.

In the hot and cold water mixing apparatus 10, the hot water flow path 1
The hot water from 14 flows into the hot water inflow chamber 90 through the hot water port 116. At this time, the guide surface 174 of the movable valve body 160 is formed so as to be curved so as to gradually increase the flow passage area, and the high temperature water flowing into the flow passage portion 172 from the hot water port 116 is smoothly introduced. The high-temperature water flows into the flow passage portion 172 without causing a rapid increase in the flow passage area, without causing bubbles or the like therein or becoming a turbulent flow. Therefore, no abnormal noise that causes discomfort when hot water flows into the hot water inflow chamber 90 from the hot water port 116 is generated.

FIG. 4 shows a hot and cold water mixing apparatus 10 according to another embodiment.
FIG. 9B is a cross-sectional view showing B, which is an embodiment in which high temperature water is prevented from flowing into between the bias springs 150 to prevent generation of abnormal noise. As shown in FIG. 4, the spring bearing member 210B includes a left bias spring bearing member 212B that receives the left end of the bias spring 150 and a right bias spring bearing member 214B that receives the right end of the bias spring 150. The left bias spring receiving member 212B includes the left spring receiving main body portion 21.
2Ba, an umbrella-shaped portion 212Bb protruding from the outer periphery of the left spring receiving main body portion 212Ba, and a left spring receiving main body portion 212Ba.
Fins 21 projecting from and abutting the movable valve body 160B
2Bc is provided, and the left end of the bias spring 150 is supported by the inside of the left spring receiving main body portion 212Ba and the inside of the umbrella-shaped portion 212Bb. On the other hand, the right bias spring receiving member 214
B has a structure similar to that of the spring bearing member 210 of FIG. Note that the umbrella-shaped portion 212B is partially notched so that high-temperature water can enter the slide chamber 96 side.

When the liner 260 is moved by the operation of the preload adjusting mechanism 200B, the left bias spring receiving member 212B moves back and forth via the bias spring 150. As a result, the movable valve body 160B slides because the annular locking portion 168B is pushed by the fins 212Bc of the spring receiving member 210B.

Further, the left bias spring receiving member 212B
Has an umbrella-shaped portion 212Bb, the umbrella-shaped portion 212
A guide passage 175B is formed between Bb and the guide surface 174B of the movable valve body 160B, and the high temperature water from the hot water side port 116 is guided to the passage portion 172B through the guide passage 175B. Therefore, since the high temperature water does not pass between the windings of the bias spring 150, no abnormal noise is generated due to the rapid increase in the flow path area due to the narrow portion of the windings.

FIG. 5 shows a hot and cold water mixing apparatus 10 according to another embodiment.
It is sectional drawing which shows C. As shown in FIG. 5, the movable valve body 1
The locking support portion 160Ca of the 60C has a central base portion 160C.
Three locking channel holes 160Cc are formed at equal intervals in the circumferential direction so as to surround b and the central base 160Cb. The left support end portion 152 of the bias spring 150 is supported by the left spring receiving member 210C. The left spring receiving member 210C includes an umbrella-shaped portion 210Ca and an umbrella-shaped portion 210Ca.
And a cylindrical portion 210Cc which slides on the inner peripheral surface of the casing main body 50, and a distal end supporting protrusion 210Cb provided at the distal end of the movable valve body 160C for pressing the central base portion 160Cb.
And a spring receiving annular recess 210Cd formed on the inner peripheral side of the cylindrical portion 210Cc. In addition, the movable valve body 16
The umbrella-shaped portion 210Ca of 0C constitutes a guide channel 175C communicating with the hot water port 116 between the guide surface 174C of the movable valve body 160C. That is, the guide channel 175
C is an umbrella-like portion 210Ca between the bias spring 150 and
Is provided so that the high temperature water from the hot water side port 116 does not reach between the windings of the bias spring 150.

In the hot and cold water mixing apparatus 10C according to the above embodiment, the bias spring 150 is separated from the hot water port 116 via the umbrella-shaped portion 210Ca of the left spring receiving member 210C, so that the hot spring water flows in from the hot water port 116. The high-temperature water that flows does not pass between the windings of the bias spring 150. Therefore, when passing through the narrow portion of the winding, no abnormal noise is generated due to the rapid increase of the flow passage area.

The left spring receiving member 210C is provided with a tip supporting protrusion 210Cb at the tip of the umbrella-shaped portion 210Ca, and the movable valve body 160C is provided by the tip supporting protrusion 210Cb.
Since the central base portion 160Cb of the movable valve body 16 is pushed,
0C also exerts an effect that an eccentric force is not applied from the bias spring 150, and the bias spring 150 does not tilt and slide.

The present invention is not limited to the above-described embodiments, but can be carried out in various modes without departing from the scope of the invention, and the following modifications can be made.

(1) In the above embodiment, the bias spring receiving member is provided with the umbrella-shaped portion as the guide passage forming member,
Although the high temperature water is configured not to flow between the windings of the bias spring, the position of the guide passage forming member is not limited to this and may be formed on the casing body side, and the position is not particularly limited.

(2) Although the guide passage forming member in the above embodiment is constructed so as to bypass the high temperature water flowing out from the hot water side port so as not to flow between the windings of the bias spring, it is generated between the coil windings. In order to prevent abnormal noise, when the water side port is provided at a position corresponding to the temperature sensitive spring, the low temperature water may be diverted to a position corresponding to the water side port.

(3) In the above embodiment, the hot water port is arranged upstream and the water port is arranged downstream of the movable valve body. However, the arrangement is reversed as long as the operation is not hindered. Alternatively, a guide passage forming member may be provided at a position corresponding to this so that high temperature water or low temperature water does not enter between the coil windings.

(4) It is not necessary to dispose the temperature sensitive spring in the main flow path of the mixed hot water, and for example, it may be used as a temperature sensor, and the movable valve may be driven by an electromagnetic solenoid or the like. Good. In this case, since the temperature-sensitive spring is not directly affected by the change in water pressure of the mixed hot water, stable operation can be performed against disturbance, and the amount of the temperature-sensitive spring itself is small, which is inexpensive. Can be used.

[0042]

As described above, according to the hot and cold water mixing apparatus of the first aspect of the present invention, the flow between the hot water side port and the hot water side port is achieved by balancing the movable valve element with the temperature sensitive spring and the bias spring. By sliding so as to change the passage area, the mixing ratio of high-temperature water and low-temperature water is changed to discharge water at the target temperature, and at the same time, the hot water flows from the hot water port or water side port to the valve body flow passage in the movable valve body. By providing the guide flow path forming member for guiding water or low temperature water, high temperature water or low temperature water does not flow between the windings of the temperature sensitive spring or the bias spring, which causes discomfort when passing between the windings. No abnormal noise is generated.

According to a second aspect of the present invention, a bias spring receiving member for receiving the bias spring is provided, and the guide passage forming member according to the first aspect is provided on the bias spring receiving member. It can be made compact.

According to the third aspect of the present invention, by forming the guide surface on the movable valve body, a high temperature is formed in the valve body flow passage so that the guide surface gradually increases the flow passage area of the hot water port or the water side port. Since water or low-temperature water is introduced, there is no abrupt change in the flow path area, and no abnormal noise accompanying this is generated.

Further, according to the invention of claim 4, as the hot and cold water mixing device, the change of the spring constant of the temperature sensitive spring is converted into the moving force of the movable valve body by the driving means constituted by the electromagnetic solenoid or the motor. Therefore, it is possible to preferably realize the configuration in which the movable valve body is slid.

[Brief description of drawings]

FIG. 1 is a sectional view showing a hot and cold water mixing apparatus according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing the movable valve body and its peripheral portion of the embodiment.

FIG. 3 is a graph showing load characteristics with respect to strain of a temperature sensitive spring.

FIG. 4 is a cross-sectional view showing a hot and cold water mixing device according to another embodiment.

FIG. 5 is a sectional view showing a hot and cold water mixing apparatus according to still another embodiment.

[Explanation of symbols]

 10 ... Hot and cold water mixing device 10C ... Hot and cold water mixing device 20 ... Outer casing 30 ... Inner casing 40 ... Operating handle 42 ... Mounting recess 50 ... Casing body 70 ... Water side valve seat member 74 ... Flange portion 80 ... Hot water mixing chamber 90 ... Hot water Inflow chamber 96 ... Slide chamber 102 ... Water introduction flow path 106 ... Water side port 108 ... Water side valve seat 114 ... Hot water flow path 116 ... Hot water side port 118 ... Hot water side valve seat 130 ... Temperature sensitive spring 132 ... Left support end 134 ... Right support end 150 ... Bias spring 152 ... Left support end 154 ... Right support end 160 ... Movable valve disc 160B ... Movable valve disc 160C ... Movable valve disc 160Ca ... Locking support 160Cb ... Central base 160Cc ... Engagement Stop channel hole 162 ... Cylindrical part 164, 166 ... Seating part 164 ... Water side seating part 166 ... Water side seating part 168 ... Annular locking part 168B ... Annular locking 172 ... Flow path part 172B ... Flow path part 174 ... Guide surface 174B ... Guide surface 174C ... Guide surface 175B ... Guide flow path 175C ... Guide flow path 180 ... Spring receiving member 190 ... Spacer 192 ... Spring receiving part 194 ... Leg part 196 ... Inter-leg flow path 198 ... Through flow path 200 ... Preload adjusting mechanism 200B ... Preload adjusting mechanism 210 ... Spring receiving member 210B ... Spring receiving member 210C ... Left spring receiving member 210Ca ... Umbrella part 210Cb ... Tip support protrusion 210Cc ... Cylindrical portion 210Cd ... Spring receiving annular recess 212 ... Main body portion 212B ... Left bias spring receiving member 212Ba ... Left spring receiving main body portion 212Bb ... Umbrella portion 214 ... Outer peripheral support portion 214B ... Right bias spring receiving member 216 ... Spring receiving portion 217 ... Female thread 218 ... Spline 250 ... Slide mechanism 260 ... La Inner 262 ... Male thread

Claims (4)

[Claims] 1. A hot and cold water mixing apparatus for mixing hot water and low temperature water to discharge hot and cold water having a target set temperature, and having a hot water side port for discharging high temperature water and a water side port for discharging low temperature water. A casing body having a sliding hole communicating with both ports, and a mixture of high temperature water discharged from the hot water port and low temperature water discharged from the water side port slidably fitted in the sliding hole. It consists of a movable valve body that adjusts the ratio and has a valve body flow passage inside which allows the high temperature water or the low temperature water to pass through, and a material whose spring constant changes according to the temperature within a predetermined temperature range. A temperature-sensitive spring that urges the movable valve element in a direction that reduces the proportion of hot water, a bias spring that urges the movable valve element in a direction opposite to the direction, and the hot water port or the water side port. To at least one of
A hot and cold water mixing device comprising: a guide flow path forming member that forms a guide flow path that guides high temperature water or low temperature water to a valve body flow path of a movable valve body by bypassing a bias spring or a temperature sensitive spring. . 2. The hot and cold water mixing apparatus according to claim 1, further comprising a bias spring receiving member for receiving the bias spring, wherein the guide flow path forming member is provided on the bias spring receiving member. 3. A hot and cold water mixing apparatus which mixes high temperature water and low temperature water and discharges mixed hot and cold water having a target set temperature, having a hot water side port for discharging high temperature water and a water side port for discharging low temperature water. A casing body having a sliding hole communicating with both ports, and a mixture of high temperature water discharged from the hot water port and low temperature water discharged from the water side port slidably fitted in the sliding hole. It consists of a movable valve body that adjusts the ratio and has a valve body flow passage inside which allows the high temperature water or the low temperature water to pass through, and a material whose spring constant changes according to the temperature within a predetermined temperature range. And a bias spring for urging the movable valve body in a direction opposite to the direction, the temperature sensitive spring urging the movable valve body in a direction to reduce the proportion of hot water. , From the outer circumference to the inner circumference A hot and cold water mixing device having a guide surface for gradually increasing the flow passage area of the hot water port or the water side port to guide the high-temperature water or the low-temperature water to the valve body flow passage. 4. A high temperature water and / or a low temperature water discharged from both ports and a mixing chamber communicating with the hot water side port or the water side port respectively discharging high temperature water and low temperature water are controlled to control the high temperature A movable valve body having a valve body flow passage inside which adjusts the mixing ratio of water and low temperature water and allows the high temperature water or the low temperature water to pass therethrough, and a mixed hot water of high temperature water and low temperature water mixed in the mixing chamber Temperature sensitive spring whose spring constant changes according to the temperature of the mixed hot water, drive means for driving the movable valve body in proportion to the biasing force of the temperature sensitive spring, and the drive direction of the drive means. A bias spring that presses the movable valve element in the opposite direction to at least one of the hot water port or the water side port,
A hot and cold water mixing apparatus comprising: a guide flow path forming member that forms a guide flow path that guides high temperature water or low temperature water to a valve body flow path of a movable valve body by bypassing a bias spring.