JP2012057779A - Hot and cold water mixing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot and cold water mixing device which can be downsized and can secure accurate temperature control performance by accelerating the mixing of hot and cold water.SOLUTION: This hot and cold water mixing device 1 has a hot and cold water mixing device body 22 which is equipped with a water passage 70 for mixing hot water and cold water flown in from a hot water inlet 36 and a water inlet 38 and adjusting them to a proper temperature, and a discharge port 44 for discharging the hot water adjusted to a proper temperature within this water passage, a main valve body 32 which is arranged slidably within this hot water mixing device body to change the flow rate of the hot and cold water, a bias spring 34 which energizes this main valve body to slide in the specified direction, and a temperature sensitive spring 35 which energizes the main valve body in a direction reverse to the energizing direction of this bias spring and changes the energizing force according to the temperature of hot water mixed in the hot and cold water mixing device body. The water passage of the hot and cold water mixing device is formed between the main valve body and a thermosensor to gather hot and cold water on the downstream side of the water passage and to lead it to a part of area eccentric from the center axis of the temperature sensitive spring.

Description

  The present invention relates to a hot and cold mixing device, and more particularly, to a hot and cold mixing device that mixes supplied hot water and water and discharges hot water adjusted to an appropriate temperature.

  Conventionally, as a hot and cold water mixing device that mixes supplied hot water and water and discharges hot water adjusted to an appropriate temperature, a temperature-sensitive spring formed from a shape memory alloy or the like and a filling that expands when heat is applied (wax element) There is known one that adjusts the temperature of discharged hot water by moving a valve body by the urging force of a temperature sensing element constituted by the like.

  The temperature sensing element used in such a conventional hot and cold water mixing device is designed to operate by sensing the temperature of hot water supplied to the temperature sensing element, but the mixing of hot and cold water is incomplete. If it is supplied to the temperature sensing element, the responsiveness of the temperature sensing element becomes unstable, or it becomes difficult to obtain a predetermined biasing force required for the temperature sensing element. Since the movement of the body is also inaccurate, there is a problem that accurate temperature control performance cannot be obtained.

Further, for example, in the hot water / water mixing apparatus described in Patent Document 1, the lumen of the temperature-sensitive spring provided in the mixing chamber in which hot water is mixed is held in a columnar body or a cylindrical body, and the mixing is performed. When the mixed water mixed with hot water and water flowing into the room passes through the outer peripheral side of the temperature-sensitive spring, the temperature-sensitive spring is operated according to the temperature of the mixed water.
Further, for example, in the hot and cold water mixing apparatus described in Patent Document 2, a temperature sensitive spring is disposed inside a temperature sensitive spring guide member slidably disposed on the downstream side of the main valve body, The hot water that has passed through the inside of the valve body flows from the center of the end of the temperature-sensitive spring guide member on the main valve body side to the inner peripheral side of the temperature-sensitive spring toward the discharge port.

JP 2002-98243 A JP 2008-248960 A

However, in the conventional hot and cold water mixing devices described in Patent Document 1 and Patent Document 2 described above, a shower faucet or the like used at a relatively large flow rate (for example, 30 l / min) is handled. When applied, since the shower faucet itself is large, it is easy to secure a sufficient space for mixing hot water inside the shower faucet, so that satisfactory temperature control performance can be obtained. However, especially when applied to an automatic faucet of a hand-washing basin that is used at a relatively small flow rate (for example, 5 l / min), the size of the automatic faucet is a shower faucet. Because it is designed to be more compact than the size of the water, it is difficult to secure the space required to mix hot water and water, and the flow rate of hot water is smaller than that of a shower tap. Mixing there is a problem that is difficult to obtain.
In addition, when it becomes difficult to mix hot and cold water using the automatic water faucet mixing device, it becomes difficult to obtain a predetermined urging force required in the temperature sensing element, and the operation of the main valve element urged by the temperature sensing element is also unsatisfactory. Since it becomes accurate, there is also a problem that accurate temperature control performance cannot be obtained.
Therefore, when applying a hot and cold water mixing device to such an automatic faucet that handles hot water with a relatively small flow rate, the hot water and water mixing device can be downsized, and hot water can be mixed efficiently in the downsized device. Thus, supplying sufficiently mixed hot and cold water to the temperature sensing element is an important issue in ensuring accurate temperature control performance.

  Accordingly, the present invention has been made to solve the above-described conventional problems, and is capable of reducing the size of the apparatus and promoting mixing of hot water and ensuring accurate temperature control performance. The purpose is to provide.

In order to achieve the above object, the present invention is a hot water and water mixing device that mixes supplied hot water and water and discharges hot water adjusted to an appropriate temperature, and includes a hot water inlet into which hot water and water flow respectively. It has a water inlet, a water passage for mixing hot water and water flowing in from each of these inlets to adjust to an appropriate temperature, and a discharge outlet for discharging hot water adjusted to an appropriate temperature in this water passage. The hot water mixing apparatus main body and the hot water mixing apparatus main body are slidably disposed inside the hot water mixing apparatus main body, and by sliding, the opening of the hot water inlet and the water inlet is changed, and the hot water mixing apparatus main body A main valve body that changes the flow rate of the flowing hot water and water, a biasing means that biases the main valve body to slide in a predetermined direction, and a direction opposite to the biasing direction of the biasing means Hot water mixed in the main body of the hot water / water mixing device by energizing the main valve body And a water passage of the hot and cold water mixing device main body is formed between the main valve body and the temperature sensitive element and upstream of the water passage. The hot water and water on the side are formed so as to be gathered and guided to a partial region eccentric from the central axis of the temperature sensing element.
In the present invention configured as described above, a water passage formed by using a narrow effective space between the main valve body and the temperature sensing element is used to supply hot water and water on the upstream side of a part of the temperature sensing element. By being formed so as to be gathered and guided to the region, the hot water / water mixing device main body can be reduced in size. Moreover, since hot water in a state of being mixed and guided by a water passage and sufficiently mixed is supplied to the temperature sensing element, the temperature sensing element and the main valve body according to the temperature of the hot water are accurately operated, Accurate temperature control performance can be secured.

In the present invention, it is preferable that the downstream end of the water passage of the hot and cold water mixing device main body is directed to a partial region of the side surface of the temperature sensing element.
In the present invention configured as described above, the water pressure due to the flow of hot water supplied from the downstream end of the water passage to a part of the temperature sensing element is inserted into a part of the side surface of the temperature sensing element. By being directed, the influence on the axial operation of the temperature sensing element is suppressed, so that it is possible to suppress a decrease in temperature control performance. As a result, accurate operation of the temperature sensing element and the main valve body according to the temperature of hot water can be realized, and accurate temperature control performance can be ensured.

In the present invention, preferably, the temperature sensitive element is a temperature sensitive spring, and the downstream end of the water passage is directed from the outer peripheral side to the inner peripheral side of the temperature sensitive spring.
In the present invention configured as above, hot water sufficiently mixed and adjusted to an appropriate temperature in the water passage is directed from the outer peripheral side of the temperature-sensitive spring toward the inner peripheral side at the downstream end of the water passage. Therefore, for example, hot water in a plane perpendicular to the axial direction of the temperature-sensitive spring is agitated positively and brought into contact with the temperature-sensitive spring in a state where mixing is further promoted. Responsiveness can be improved. As a result, an accurate operation of the temperature sensitive spring and the main valve body according to the temperature of hot water can be realized, and an accurate temperature control performance can be ensured.

In the present invention, preferably, hot water supplied to the temperature-sensitive spring from the downstream end of the water passage is passed through the outlet of the hot-water mixing device main body on the inner and outer peripheral sides of the temperature-sensitive spring. A flow path for water is formed.
In the present invention configured as described above, hot water supplied to the temperature-sensitive spring from the downstream end of the water passage is passed through the discharge port of the hot-water mixing device main body on the inner and outer peripheral sides of the temperature-sensitive spring. Since each of the water flow paths is formed, the area where hot water supplied from the downstream end of the water passage contacts the temperature sensitive spring can be increased. The temperature control spring and the main valve body according to the temperature of hot water can be accurately operated, and accurate temperature control performance can be ensured.

In the present invention, preferably, it further includes a temperature-sensitive spring guide member provided so as to cover the outer peripheral portion of the temperature-sensitive spring from the main valve body side, and a part of the outer periphery of the temperature-sensitive spring guide member includes: A concave groove extending a predetermined distance from the end on the main valve element side to the downstream side in the axial direction is formed, and the concave groove forms the water passage with the inner peripheral portion of the hot water mixing apparatus body facing the concave groove. The downstream end portion of the concave groove is directed from the outer peripheral side to the inner peripheral side of the temperature-sensitive spring.
In the present invention configured as described above, a temperature-sensitive spring guide member is provided so as to cover the outer periphery of the temperature-sensitive spring from the main valve body side using a narrow effective space between the main valve body and the temperature-sensitive spring. The hot water / water mixing device main body is reduced in size by directing the downstream end portion of the concave groove formed in a part of the outer periphery of the temperature-sensitive spring guide member from the outer periphery side to the inner periphery side of the temperature-sensitive spring. be able to. In addition, it is possible to ensure a sufficient flow path length for hot water and water to be mixed in the water passage (concave groove) from the main valve body to the temperature sensitive spring. Furthermore, the water pressure due to the flow of hot water supplied from the downstream end of the water passage (concave groove) to the temperature-sensitive spring acts from the outer peripheral side to the inner peripheral side of the temperature-sensitive spring. Since the influence on the operation in the axial direction is suppressed, it is possible to suppress a decrease in temperature control performance. Also, hot water that is sufficiently mixed in the water passage (concave groove) and adjusted to an appropriate temperature is passed from the downstream end of the water passage (concave groove) through the outer peripheral portion of the temperature sensitive spring to the inner peripheral portion of the temperature sensitive spring. It can supply reliably and can improve the responsiveness of the temperature sensitive spring with respect to the temperature of hot water. As a result, an accurate operation of the temperature sensitive spring and the main valve body according to the temperature of hot water can be realized, and an accurate temperature control performance can be ensured.

  According to the hot and cold water mixing apparatus of the present invention, the apparatus can be downsized, and mixing of hot and cold water can be promoted to ensure accurate temperature control performance.

It is a perspective view which shows the whole hot-water mixing faucet with which the hot-water mixing apparatus by 1st Embodiment of this invention was incorporated. It is a perspective view of the hot and cold water mixing apparatus according to the first embodiment of the present invention. It is sectional drawing of the hot and cold water mixing apparatus by 1st Embodiment of this invention. It is a disassembled perspective view of the hot and cold water mixing apparatus according to the first embodiment of the present invention. It is a perspective view of the temperature-sensitive spring guide member built in the hot and cold water mixing apparatus according to the first embodiment of the present invention. It is sectional drawing of the hot water mixing apparatus by 2nd Embodiment of this invention. It is a perspective view of the temperature-sensitive spring guide member built in the hot and cold water mixing apparatus according to the second embodiment of the present invention.

Hereinafter, a hot and cold water mixing apparatus according to a first embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a perspective view showing an entire hot-water mixing faucet incorporating a hot-water mixing device according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view of the hot-water mixing device according to the first embodiment of the present invention. FIG. 3 is a sectional view of the hot and cold water mixing apparatus according to the first embodiment of the present invention, and FIG. 4 is an exploded perspective view of the hot and cold water mixing apparatus according to the first embodiment of the present invention.

First, as shown in FIG. 1, reference numeral 1 denotes a hot and cold mixing device according to the first embodiment of the present invention, and the hot and cold mixing device 1 is hot water that is an automatic faucet provided in a washstand 2 for washing hands. Built into the faucet body 6 of the mixing faucet 4.
Next, the faucet body 6 is provided with a human sensor 10 at a position adjacent to the water outlet 8, and when the user puts his finger near the lower part of the water outlet 8, the human sensor 10 The solenoid valve 12 that is detected and built in the faucet body 6 in the faucet body 6 is automatically opened under the control of the controller 14 that is built in the faucet body 6, and the hot water supply pipe 16. The hot water and the water supplied from the water supply pipes 18 to the hot water mixing device 1 are appropriately mixed in the hot water mixing device 1 and adjusted to hot water having a desired temperature, and then discharged from the water outlet 8. It is like that.
Further, when the human sensor 10 no longer detects, the electromagnetic valve 12 is automatically closed under the control of the controller 14 and water is stopped.

  Further, a hot water temperature adjusting dial 20 is attached to the right side surface of the flush main body 6 of the hot water / water mixing faucet 4, and the hot water temperature adjusting dial 20 is a hot water / water mixing device that accommodates main components of the hot water / water mixing device 1. It is attached to a feed screw 24 that protrudes axially outward from the main body 22. The hot water mixing device 1 is operated by turning the hot water temperature adjusting dial 20 so that the temperature of hot water discharged from the water outlet 8 can be adjusted to an appropriate temperature.

  Next, as shown in FIGS. 2 to 4, the hot water / water mixing apparatus 1 includes a hot water / mixing apparatus main body 22 including a first main body member 26 and a second main body member 28 attached to the first main body member 26, A feed screw 24 connected to the temperature adjustment dial 20 and a sliding member 30 that is screwed into the feed screw 24 and slides within the first body member 26 when the feed screw 24 is rotated.

  The hot and cold water mixing apparatus 1 includes a main valve body 32 that is movably disposed inside the first main body member 26, and a bias spring that is a biasing means that biases the main valve body 32 in the left direction in FIG. 34 and a temperature sensing spring 35 that is a temperature sensing element that urges the main valve body 32 in the right direction in FIG. 3 opposite to the bias spring 34. The temperature sensing spring 35 is made of a shape memory alloy. A coil spring is used.

As shown in FIGS. 3 and 4, the first main body member 26 has a substantially cylindrical shape, and a hot water inlet 36 for injecting hot water and a water inlet 38 for inflowing water are respectively in the circumferential direction. Is provided.
Further, the right end surface of the hot water inlet 36 in FIG. 3 is formed as a hot water side seat surface 40 that comes into contact with the main valve body 32.
Furthermore, cylindrical filters 37 and 39 are respectively arranged outside the first main body member 26 so as to cover the hot water inlet 36 and the water inlet 38, and the hot water or dust mixed in the water is hot water. It is prevented from flowing into the hot and cold water mixing device main body 22 of the mixing device 1.

The second main body member 28 has a substantially cylindrical shape, and the left end surface of the second main body member 28 in FIG. 3 is formed as a water-side seat surface 42 that comes into contact with the main valve body 32.
A plurality of discharge ports 44 through which hot water mixed in the hot water / mixer main body 22 flows out are formed at the end of the second main body member 28 opposite to the water side sheet surface 42.

  The feed screw 24 is rotatably disposed inside the first main body member 26. A spline portion 46 to which the hot water temperature adjusting dial 20 is attached is formed at one end portion of the feed screw 24, and a feed male screw portion 48 to be screwed with the sliding member 30 is formed at the other end portion. ing.

The sliding member 30 has a substantially cylindrical shape and is slidably disposed inside the first main body member 26. Further, an axial groove 50 is formed outside the sliding member 30, and this groove 50 receives a protrusion (not shown) extending in the axial direction formed inside the first body member 26. Thus, the rotation of the sliding member 30 relative to the first main body member 26 is restricted.
Further, a feed female screw portion 52 that is screwed with the feed male screw portion 48 of the feed screw 24 is formed inside the sliding member 30. Accordingly, when the feed screw 24 is rotated, the sliding member 30 is slid in the axial direction of the first main body member 26.

The main valve body 32 includes a substantially cylindrical cylindrical portion 54 and a partition portion 56 that extends inwardly from the inner wall of the cylindrical portion 54 and forms a plurality of channels extending in the axial direction inside the cylindrical portion 54. Yes.
Further, at both ends of the cylindrical portion 54 of the main valve body 32, a hot water side seat portion 58 that contacts the hot water side seat surface 40 and a water side seat portion 60 that contacts the water side seat surface 42 are formed.

  Further, as shown in FIG. 3, an O-ring 62 that is an elastic seal member is disposed on the outer periphery of the cylindrical portion 54 of the main valve body 32. The O-ring 62 is located between the cylindrical portion 54 of the main valve body 32 and the inner wall surface of the first main body member 26, and the hot water and water flowing into the hot water / mixer main body 22 are outside the main valve body 32. Prevents mixing.

  As shown in FIG. 3, a shaft member 64 inserted on the inner peripheral side of the coil-shaped bias spring 34 between the inside of the main valve body 32 and the sliding member 30, and the shaft member 64 And a spring retainer 66 that holds both ends of the bias spring 34 is disposed. The bias spring 34 sandwiched between the spring pressing metal fittings 66 on both sides is disposed inside the first main body member 26 in a pre-compressed state, and when the sliding member 30 contacts the spring pressing metal fitting 66, The main valve body 32 is urged to the left in FIG.

  Further, as shown in FIG. 3, on the left side of the main valve body 32, a temperature-sensitive spring guide member 68 provided so as to cover the outer peripheral portion of the temperature-sensitive spring 35 from the main valve body side is provided on the second main body member 28. It is slidably arranged inside.

FIG. 5 is a perspective view of a temperature-sensitive spring guide member built in the hot and cold water mixing apparatus according to the first embodiment of the present invention.
As shown in FIGS. 3 to 5, the temperature-sensitive spring guide member 68 is a substantially cylindrical member, holds the main valve body side end of the temperature-sensitive spring 35, and hot water on the downstream side of the main valve body 32. In addition, a water passage 70 is formed that bypasses the temperature-sensitive spring guide member 68 and collects water in a part of the outer peripheral side of the temperature-sensitive spring 35 and guides it to the temperature-sensitive spring 35.

  Further, an insertion hole 76 into which the protruding portion 72 of the main valve body 32 can be inserted is formed at the center of the right main valve body side end portion 74 in FIG. 3 of the temperature-sensitive spring guide member 68, and this main valve body 32. When the stepped portion 78 formed at the base end of the protruding portion 72 contacts the end portion 74 of the temperature-sensitive spring guide member 68, the protruding portion 72 of the main valve body 32 passes through the insertion hole 76 of the temperature-sensitive spring guide member 68. The temperature sensing spring 35 urges the main valve body 32 to the right in FIG. 3 via the temperature sensing spring guide member 68.

Further, a part of the outer peripheral portion of the temperature-sensitive spring guide member 68 extends a predetermined distance from the main valve element side end 74 toward the downstream side in the axial direction of the temperature-sensitive spring guide member 68, and extends from the outer peripheral portion to the inner peripheral portion. A recessed groove 80 that is recessed toward the surface is formed.
That is, the concave groove 80 of the temperature-sensitive spring guide member 68 is disposed at a position eccentric from the central axes of the main valve body 32, the temperature-sensitive spring guide member 68, and the temperature-sensitive spring 35, and faces the concave groove 80. The hot water and water on the downstream side of the main valve body 32 are gathered in a partial area on the outer peripheral side of the temperature-sensitive spring guide member 68 and the temperature-sensitive spring 35 by the inner peripheral surface of the second main body member 28, thereby It functions as a water passage 70 that is mixed and guided to the temperature-sensitive spring 35.

  Moreover, the opening 82 formed in the downstream end part of the ditch | groove 80 has the hot water mixed through the inside of the water flow path 70 directed from the outer peripheral side of the temperature-sensitive spring 35 toward the inner peripheral side. .

Furthermore, in the space on the inner peripheral side of the temperature sensing spring 35, the inner circumference that allows hot water supplied from the opening 70 of the water passage 70 to the temperature sensing spring 35 to flow toward the discharge ports 44 of the hot water mixing apparatus main body 22. A side channel 84 is formed.
Further, the hot water supplied to the temperature sensitive spring 35 from the opening 70 of the water passage 70 is also supplied to the space between the outer peripheral portion of the temperature sensitive spring 35 and the inner wall surface of the temperature sensitive spring guide member 68. An outer peripheral flow path 86 that allows water to flow toward each discharge port 44 is formed.

Below, with reference to FIGS. 1-5, the effect | action of the hot-water mixing apparatus 1 by embodiment of this invention is demonstrated.
First, the user of the hot and cold water mixing tap 4 sets the hot water temperature adjusting dial 20 to a desired temperature. Here, when the hot water temperature adjusting dial 20 is set to the lowest temperature, the sliding member 30 is positioned at the right end in FIG. In this state, as shown in FIG. 3, since the sliding member 30 is separated from the spring retainer 66, the biasing force by the bias spring 34 does not act, and the hot water side seat portion 58 of the main valve body 32 is The hot water side sheet surface 40 is brought into contact with the urging force of 35. That is, only water can flow into the hot water / mixer main body 22 from the water inlet 38.

  Next, when the user operates the hot water temperature adjusting dial 20 to rotate the feed screw 24 in order to increase the set temperature, the sliding member 30 is moved in the left direction in FIG. Is in contact with the spring retainer 66. As a result, the biasing force by the bias spring 34 also acts on the main valve body 32, and the main valve body 32 is moved to a position where the biasing force of the bias spring 34 and the biasing force of the temperature-sensitive spring 35 are balanced.

  After setting the hot water temperature adjustment dial 20, when the user puts his / her finger near the lower part of the spout 8, the human sensor 10 detects this, and the electromagnetic valve 12 in the faucet body 6 is connected to the controller 14. The valve is automatically opened by the control, supplied to the hot water mixing device 1 from each of the hot water supply pipe 16 and the water supply pipe 18, and hot water and water are appropriately mixed inside the hot water mixing device 1 to obtain hot water at a desired temperature. After the adjustment, the water discharge from the water discharge port 8 is started.

  When water discharge is started, the hot water introduced from the hot water supply leg 4 flows into the hot water inlet 36 through the filter 37, and the water introduced from the water supply leg 6 passes through the filter 39 to the water inlet 38. Flow into. Hot water that has flowed in from the hot water inlet 36 passes between the hot water side seat portion 58 and the hot water side sheet surface 40 of the main valve body 32 and flows into the hot water mixing apparatus body 22, and water that has flowed in from the water inlet 38 flows into the main valve. It passes between the water side sheet portion 60 and the water side sheet surface 42 of the body 32 and flows into the hot water / mixer main body 22.

The hot water that has flowed into the hot water mixing apparatus main body 22 from the hot water inlet 36 flows through the cylindrical portion 54 of the main valve body 32 and flows to the left in FIG.
Further, the water flowing into the hot water mixing device main body 22 from the water inlet 38 is part of the outer periphery of the temperature sensitive spring guide member 68 due to the water pressure in a narrow space between the main valve body 32 and the temperature sensitive spring guide member 68. It flows so that it may be guide | induced in the water passage 70 formed in this.
Furthermore, the water that has flowed into the water passage 70 is guided and mixed so that it passes through the cylindrical portion 54 and flows into the water passage 70 so as to be gathered together in the narrow water passage 70. The mixed hot water is directed and discharged from the outer peripheral side of the temperature-sensitive spring 35 toward the inner peripheral side at the opening 82 of the water passage 70.

  Further, the mixed hot water discharged from the opening 82 of the water passage 70 toward the temperature-sensitive spring 35 passes through the inner peripheral side flow path 84 and the outer peripheral side flow path 86, whereby the inner peripheral side of the temperature sensitive spring 35 and The air flows evenly through the gaps between the outer peripheral side and the spring element wires of the temperature-sensitive spring 35, and is discharged from each discharge port 44 of the hot and cold mixing device body 22 while transferring heat to the entire surface of the temperature-sensitive spring 35. At this time, the water pressure due to the flow of hot water supplied from the opening 82 at the downstream end of the water passage 70 to the temperature sensing spring 35 acts from the outer circumference side to the inner circumference side of the temperature sensing spring 35. The influence on the axial movement of 35 is suppressed.

In addition, when the temperature of the hot water flowing through the temperature sensitive spring 35 is higher than the set temperature, the temperature sensitive spring 35 acts to extend, so that the urging force by the temperature sensitive spring 35 increases. Thereby, the position where the urging force by the temperature sensitive spring 35 and the urging force by the bias spring 34 balance is moved to the right side in FIG. 3, and the main valve body 32 is moved to the right.
As a result, the distance between the hot water side sheet portion 58 and the hot water side sheet surface 40 is shortened, and the distance between the water side sheet portion 60 and the water side sheet surface 42 is increased. The ratio of water increases and the temperature of the discharged hot water decreases.
On the contrary, when the temperature of the hot water flowing through the temperature sensing spring 35 is lower than the set temperature, the urging force by the temperature sensing spring 35 decreases, and the main valve body 32 is moved leftward in FIG. The temperature of the hot water rises.
By these actions, the temperature of the hot water discharged from the water outlet 8 of the hot and cold water mixing tap 4 is adjusted to the set temperature.

  According to the hot and cold water mixing device 1 of the first embodiment of the present invention described above, the hot water and water downstream of the main valve body 32 are utilized using the narrow effective space between the main valve body 32 and the temperature sensitive spring 35. Are introduced into a water passage 70 formed on a part of the outer periphery of the temperature-sensitive spring guide member 68, gathered in a partial region on the outer peripheral side of the temperature-sensitive spring guide member 68, and guided to the temperature-sensitive spring 35. Then, mixing of hot water and water in the water passage 70 is promoted, and hot water in a sufficiently mixed state can be guided to the temperature sensing spring 35, and hot water adjusted to an appropriate temperature is discharged from the discharge port 44 of the hot water mixing apparatus body 22. be able to. Further, by utilizing a narrow effective space between the main valve body 32 and the temperature sensing spring 35, hot water and water downstream of the main valve body 32 are transferred to a partial area on the outer peripheral side of the temperature sensing spring guide member 68. By forming the water passage 70 that gathers and leads to the temperature-sensitive spring 35, the hot and cold mixing device main body 22 can be reduced in size.

  Further, according to the hot and cold water mixing device 1 of the present embodiment, the outer periphery of the temperature-sensitive spring guide member 68 is bypassed in the water passage 70 extending from the main valve body 32 to the temperature-sensitive spring 35 so as to bypass the temperature-sensitive spring guide member 68. Hot water and water are mixed in the water passage 70 by forming a part of the opening 82 at the downstream end of the water passage 70 from the outer peripheral side to the inner peripheral side of the temperature-sensitive spring 35. Therefore, a sufficient flow path length can be ensured, and mixing of hot and cold water can be promoted.

  Furthermore, according to the hot and cold water mixing apparatus 1 of the present embodiment, hot water that has been sufficiently mixed after passing through the water passage 70 is supplied to the temperature sensitive spring 35 and then easily stirred around the temperature sensitive spring 35. Therefore, mixing of hot water discharged from the discharge port 44 of the hot water mixing apparatus main body 22 can be promoted.

  Further, according to the hot and cold mixing device 1 of the present embodiment, the opening 82 at the downstream end portion of the water passage 70 is formed in the temperature sensing spring 35 using the narrow effective space between the main valve body 32 and the temperature sensing spring 35. By directing from the outer peripheral side to the inner peripheral side, the pressure due to the flow of hot water supplied from the opening 82 at the downstream end of the water passage 70 to the temperature sensitive spring 35 is increased from the outer peripheral side of the temperature sensitive spring 35. Since it acts toward the inner peripheral side and the influence on the urging force in the axial direction of the temperature-sensitive spring 35 is suppressed, the temperature control performance is lowered due to the unstable operation of the temperature-sensitive spring 35 in the axial direction. Can be suppressed. In addition, the hot and cold water that has been sufficiently mixed in the water passage 70 and adjusted to an appropriate temperature is surely passed from the opening 82 at the downstream end of the water passage 70 to the inner periphery of the temperature sensing spring 35 through the outer circumference of the temperature sensing spring 35. Since the response of the temperature sensing spring 35 to the temperature of hot water can be improved, accurate operation of the temperature sensing spring 35 and the main valve body 32 according to the temperature of the hot water is realized, and the hot water Accurate temperature control performance of the mixing apparatus 1 can be ensured.

  Further, according to the hot water / water mixing device 1 of the present embodiment, the mixed hot water supplied to the temperature sensitive spring 35 from the opening 82 at the downstream end of the water passage 70 is passed through the discharge port 44 of the hot water / water mixing device body 22. Since the flow paths 84 and 86 are formed on both the inner peripheral side and the outer peripheral side of the temperature-sensitive spring 35, the mixed hot water supplied from the opening 82 at the downstream end of the water passage 70 is the temperature-sensitive spring 35. Since the area that flows through the gaps between the spring wires of the temperature sensing spring 35 and the inner circumference side and the outer temperature side of the temperature sensing spring 35 can be increased, the urging force of the temperature sensing spring 35 with respect to the temperature of the hot water can be increased. Responsiveness can be improved, accurate operation of the temperature sensing spring 35 and the main valve body 32 according to the temperature of hot water can be realized, and accurate temperature control performance can be ensured.

Next, a hot and cold water mixing apparatus according to a second embodiment of the present invention will be described with reference to FIGS.
FIG. 6 is a cross-sectional view of a hot and cold water mixing apparatus according to a second embodiment of the present invention, and FIG. 7 is a perspective view of a temperature-sensitive spring guide member built in the hot and cold water mixing apparatus according to the second embodiment of the present invention.
Here, in the hot and cold water mixing apparatus according to the second embodiment of the present invention, the configuration of the built-in temperature-sensitive spring guide member and the configuration of a part of these are different from those of the first embodiment described above.
Therefore, in the second embodiment of the present invention, only points different from the first embodiment will be described, the same components are denoted by the same reference numerals, and the description thereof will be omitted.

As shown in FIGS. 6 and 7, the temperature-sensitive spring guide member 102 of the hot and cold water mixing device 100 according to the second embodiment of the present invention is slidable within the second main body member 28 of the hot and cold water mixing device main body 22. The cylindrical portion 104 is arranged, and includes a substantially cylindrical cylindrical portion 104 and a protruding edge portion 106 formed on the main valve body side end portion located on the right side of the cylindrical portion 104 in FIG.
Further, an opening 108 is formed in a part of the temperature-sensitive spring guide member 102 on the protruding edge portion 106 side of the cylindrical portion 104, and the inner peripheral side of the protruding edge portion 106 from the right side of the temperature-sensitive spring guide member 102 in FIG. 6. A water passage 110 is formed through the opening 108 of the cylindrical portion 104.

In the hot and cold mixing device 100 according to the second embodiment of the present invention configured as described above, the hot water flowing into the hot water and mixing device body 22 from the hot water inlet 36 passes through the cylindrical portion 114 of the main valve body 112. The water flowing into the water passage 110 and flowing into the hot and cold water mixing device main body 22 from the water inlet 38 is caused by the water pressure in the narrow space between the main valve body 112 and the temperature sensitive spring guide member 102, and the temperature sensitive spring guide member. It flows in so that it may be guide | induced in the water flow path 110 formed in the inner peripheral part of 102.
Further, the water flowing into the water passage 110 is forcibly mixed in the narrow water passage 110 with the hot water flowing through the cylindrical portion 114 of the main valve body 112 and flowing into the water passage 110. Hot water is directed and discharged from the inner peripheral side of the temperature-sensitive spring 35 toward the outer peripheral side at the opening 108 of the water passage 110.

  Further, the mixed hot water discharged from the opening 108 of the water passage 110 toward the temperature-sensitive spring 35 passes through the inner peripheral side flow path 84 and the outer peripheral side flow path 86, so that the inner peripheral side of the temperature sensitive spring 35 and The air flows evenly through the gaps between the outer peripheral side and the spring element wires of the temperature-sensitive spring 35, and is discharged from the discharge ports 44 of the hot and cold mixing device body 22. At this time, the pressure due to the flow of hot water supplied from the opening 108 of the water passage 110 to the temperature sensing spring 35 acts from the inner circumference side to the outer circumference side of the temperature sensing spring 35, and the axial direction of the temperature sensing spring 35 is increased. The influence on the operation is suppressed.

  According to the hot and cold water mixing device 100 of the second embodiment of the present invention described above, the hot water and water downstream of the main valve body 112 are utilized using the narrow effective space between the main valve body 112 and the temperature sensitive spring 35. Are introduced into a water passage 110 formed on a part of the inner periphery of the temperature-sensitive spring guide member 102, gathered in a partial area on the inner periphery side of the temperature-sensitive spring guide member 102, and guided to the temperature-sensitive spring 35. Thus, mixing of hot water in the water passage 110 is promoted, hot water in a sufficiently mixed state can be guided to the temperature sensing spring 35, and hot water adjusted to an appropriate temperature is discharged from the hot water mixing apparatus body 22 44 can be discharged. In addition, by utilizing a narrow effective space between the main valve body 112 and the temperature sensing spring 35, hot water and water downstream of the main valve body 32 are used for a partial area on the inner circumferential side of the temperature sensing spring guide member 102. By forming the water passage 110 that is gathered together and led to the temperature-sensitive spring 35, the hot and cold mixing device main body 22 can be reduced in size. Furthermore, since the hot water in a sufficiently mixed state passing through the water passage 110 is supplied to the temperature sensing spring 35, accurate operation of the temperature sensing spring 35 and the main valve body 112 according to the temperature of the hot water is realized. The accurate temperature control performance of the hot and cold water mixing device 100 can be ensured.

  In the hot and cold water mixing apparatus according to the first and second embodiments of the present invention described above, an example is described in which a shape memory alloy coil spring is used as the temperature sensitive spring 35 used in the temperature sensitive element. However, instead of the temperature-sensitive spring 35, a temperature-sensitive element such as a filler (wax element) that expands when heat is applied may be used.

DESCRIPTION OF SYMBOLS 1 Hot water mixing device 2 Wash basin 4 Hot water mixing faucet 6 Water faucet body 8 Water outlet 10 Human sensor 12 Electromagnetic valve 14 Controller 16 Hot water supply pipe 18 Water supply pipe 20 Hot water temperature adjustment dial 22 Hot water mixing equipment main body 24 Feed screw 26 First body member 28 Second body member 30 Sliding member 32 Main valve body 34 Bias spring 35 Temperature sensitive spring 36 Hot water inlet 37 Filter 38 Water inlet 39 Filter 40 Hot water side sheet surface 42 Water side sheet surface 44 Discharge port 46 Spline part 48 Feed male thread part 50 Groove 52 Feed female thread part 54 Cylindrical part 56 Partition part 58 Hot water side sheet part 60 Water side sheet part 62 O-ring 64 Shaft member 66 Spring retainer fitting 68 Temperature sensitive spring guide member 70 Water passage 72 Projecting part 74 Main valve element side end of temperature-sensitive spring guide member 76 Insertion hole 78 Step portion 80 Concave groove 82 Open 84 inner peripheral side passageway 86 outer peripheral flow path 100 the hot and cold water mixing device 102 temperature sensitive spring guide member 104 cylindrical portion 106 projecting edge 108 opening 110 water channel 112 main valve body 114 cylindrical portion

Claims (5)

A hot water mixing device that mixes supplied hot water and water and discharges hot water adjusted to an appropriate temperature,
Hot water inlet and water inlet into which hot water and water flow respectively, a water passage for mixing hot water and water flowing in from each of these inlets to adjust to an appropriate temperature, and adjustment to an appropriate temperature in this water passage A hot water mixing apparatus main body comprising a discharge port through which the hot water is discharged,
The hot water / water mixing device main body is slidably disposed, and by sliding, changes the opening of the hot water inlet and the water inlet, and the flow rate of hot water and water flowing into the hot water / mixing device main body. A main valve body that changes
Biasing means for biasing the main valve body to slide in a predetermined direction;
A temperature sensing element that urges the main valve body in a direction opposite to the urging direction of the urging means, and changes the urging force according to the temperature of the hot water mixed in the hot water mixing apparatus body; Have
The water passage of the hot water mixing apparatus main body is formed between the main valve body and the temperature sensing element, and a part of the hot water and water upstream of the water passage is decentered from the central axis of the temperature sensing element. A hot / cold water mixing device characterized by being formed so as to be gathered and guided to an area.   The hot and cold water mixing apparatus according to claim 1, wherein a downstream end portion of the water passage of the hot water and mixing apparatus body is directed to a partial region of the side surface of the temperature sensing element.   The hot / cold water mixing device according to claim 2, wherein the temperature sensing element is a temperature sensing spring, and a downstream end portion of the water passage is directed from an outer circumferential side to an inner circumferential side of the temperature sensing spring.   On the inner peripheral side and the outer peripheral side of the temperature-sensitive spring, there are formed channels for passing hot water supplied to the temperature-sensitive spring from the downstream end of the water passage to the discharge port of the hot-water mixing device body, respectively. The hot and cold water mixing apparatus according to claim 3.   Furthermore, it has a temperature sensing spring guide member provided so that the outer peripheral part of the said temperature sensing spring may be covered from the main valve body side, and the end part by the side of the main valve body is formed in a part of outer periphery of this temperature sensing spring guide member A concave groove extending a predetermined distance is formed on the downstream side in the axial direction, and the concave groove forms the water passage with the inner peripheral portion of the hot water mixing apparatus body facing the concave groove, and is downstream of the concave groove. The hot and cold water mixing apparatus according to claim 3 or 4, wherein an end portion is directed from an outer peripheral side to an inner peripheral side of the temperature sensitive spring.

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