JP2011069477A - Cold and hot water mixing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cold and hot water mixing device adjusting temperature stably even if a temperature of hot water flowing in is changed. <P>SOLUTION: This a cold and hot water mixing device is equipped with: a body casing 20 having a hot water flow-in port 21, a water flow-in port 22, and a mixed cold and hot water flow-out port 25; a setting operation part for setting temperature of mixed cold and hot water; a valve element 15 moving in the body casing 20 to adjust an opening of the hot water flow-in port 21 and the cold water flow-in port 22 and change flow rate of the cold water and hot water flowing into the body casing 20; an energizing part 17 for generating energizing force for moving the valve element 15 in one side direction in accordance with amount of operation of the setting operation part; a first thermosensitive energizing part 18 for generating energizing force for moving the valve element in the opposite direction to the energizing part 17 to let the energizing force flow into the body casing 20 and change it in accordance with temperature of the mixed cold and hot water; and a second thermosensitive energizing part 19 for generating energizing force for letting the valve element 15 slide in the opposite direction of the energizing part 17 in accordance with temperature of the hot water flowing into the body casing 20. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a hot and cold water mixing device that mixes supplied hot water and water and can supply mixed hot water adjusted to an appropriate temperature to a faucet.

  Conventionally, as an example of a hot and cold water mixing device, a device using a coil spring (so-called “temperature-sensitive spring”) formed of a shape memory alloy (SMA; Shape Memory Alloy) and a bias spring is known. It is applied to a faucet provided in a bathroom or kitchen.

  In such a hot and cold water mixing device, a temperature-sensitive spring and a bias spring are arranged on both sides of a cylindrical valve body slidably arranged in a cylindrical main body casing, and the valve is positioned at a position where the urging forces of these springs are balanced. It is configured to move the body.

  When the temperature of the mixed hot water rises, the urging force of the temperature-sensitive spring increases, narrowing the gap between the hot water side valve seat and the valve body formed in the main body casing, while the water side valve seat and the valve The valve body moves so as to widen the gap between the body and the temperature of the mixed hot water discharged from the faucet is adjusted to a predetermined temperature set by the operation handle.

  Usually, such a hot and cold water mixing apparatus is designed so that an accurate mixing temperature is discharged when hot water is supplied at a constant temperature, for example, a hot water supply temperature is 60 ° C. However, there has been a problem that when the hot water temperature itself from a hot water heater or the like changes, it becomes difficult to discharge the mixed hot water at an accurate temperature. For example, when the hot water supply temperature is lowered to 40 ° C., a phenomenon that the temperature of the mixed hot water discharged is less than 40 ° C. tends to occur.

  Therefore, even when the hot water temperature changes, the mixed hot water at an accurate temperature is discharged by making the biasing portion used for the purpose of the conventional bias spring sense only hot water using the second temperature sensitive biasing member. There has been proposed a hot and cold water mixing apparatus configured as described above (see, for example, Patent Document 1).

JP 2001-254868 A

  However, when a temperature-sensitive biasing member is used as a substitute for the conventional bias spring, the temperature-sensitive biasing member expands and contracts greatly, and the life of the temperature-sensitive biasing member is significantly deteriorated. If so, there was a problem that even the temperature control performance due to the setting of the operation handle performed at the normal hot water supply temperature deteriorated.

  An object of the present invention is to provide a hot and cold water mixing device that can solve the above-described problems.

  (1) In the present invention, a main body casing formed with a hot water inlet, a water inlet, a mixed water outlet from which the mixed hot water flows out, and a setting operation unit for setting a target temperature of the mixed hot water to be discharged are provided. A hot and cold water mixing device that mixes the supplied hot water and water and discharges the mixed hot water adjusted to the temperature set by the setting operation unit, and is disposed in the main body casing, respectively. A valve body that moves and adjusts the opening of the hot water inlet and the water inlet and changes the flow rate of hot water and water flowing into the main body casing, and the valve body according to the operation amount of the setting operation unit A biasing portion that generates a biasing force that moves the valve body in one direction, and a biasing force that moves the valve body in a direction opposite to the biasing portion, and the biasing force flows into the main body casing. Mixed A first temperature-sensitive biasing portion that changes according to the temperature of the water and a biasing force that slides the valve body in a direction opposite to the biasing portion according to the temperature of the hot water flowing into the main body casing. And a second temperature-sensing urging portion that is generated.

  Therefore, when there is a change in the temperature of the incoming hot water, for example, even if the temperature of the hot water such as a water heater changes, an urging force that causes the main valve body to slide according to the temperature of the mixed hot water is generated. In addition to the first temperature-sensing urging unit, the second temperature-sensing urging unit detects the temperature of hot water and generates an urging force that slides the valve body, so even if the temperature of the hot water changes, mixing It is possible to adjust the temperature of the hot water so that it becomes the temperature set by the setting operation unit.

  (2) The hot water mixing apparatus according to (1), wherein the biasing portion generates a biasing force that slides the valve body in a direction that increases a flow rate of hot water flowing into the main body casing. The first and second temperature sensitive urging portions generate a urging force that slides the valve body in a direction that increases the flow rate of water flowing into the main body casing, and the second temperature sensitive urging portion. The reaction temperature range is a range including a high temperature range equal to or higher than the reaction temperature range of the first temperature-sensing urging portion.

  Therefore, for example, even when the hot water supply temperature is changed from a normally used hot water temperature to a high temperature, for example, during the water discharge, the reaction temperature range of the second temperature sensing urging unit is at least lower than the reaction temperature range of the first temperature sensing urging unit. Therefore, temperature can be adjusted with no problems.

  (3) The present invention provides the hot and cold water mixing apparatus according to (1) or (2) described above, wherein one end of the second temperature-sensing urging portion is brought into contact with the main body casing side, and the other end is connected to the valve body. The valve body can be slid in the direction opposite to the urging portion by an urging force according to the temperature of the hot water flowing into the main body casing. It is characterized by.

  That is, since the second temperature sensing urging unit does not expand or contract by an operation by the setting operation unit, the life of the second temperature sensing urging unit is not reduced and the temperature sensing performance is not deteriorated. There is no risk of shortening the lifetime of the device itself.

  (4) In the hot and cold water mixing apparatus according to (1) or (2), the present invention provides a first temperature sensing region corresponding to the first temperature sensing urging unit and the second temperature sensing urging unit. A temperature sensing member integrally formed with a corresponding second temperature sensing region, and at least the second temperature sensing region is formed in the valve body that contacts and separates from a water-side valve seat formed in the main body casing; It is arrange | positioned rather than the made water side valve part on the said hot water inlet side.

  Therefore, since the first and second temperature sensitive urging portions are integrated, the number of parts can be reduced and the structure can be simplified.

  According to the present invention, since the bias spring and the second temperature-sensing urging portion are provided separately and independently, even if the temperature of the hot water supplied to the hot water / water mixing device changes, the temperature of the mixed hot water is reduced. In addition to being able to discharge at the set temperature, there is no possibility that the life of the second temperature-sensing urging unit will be shortened.

It is explanatory drawing of the water faucet provided with the hot water mixing apparatus which concerns on one Embodiment. It is a longitudinal cross-sectional view of the hot water mixing apparatus. It is a disassembled perspective view of the hot water mixing device. It is a graph which shows the characteristic of a 2nd temperature sensing urging part. It is a longitudinal cross-sectional view of the hot water mixing apparatus which concerns on other embodiment. It is a longitudinal cross-sectional view of the hot water mixing apparatus which concerns on other embodiment. It is a longitudinal cross-sectional view of the hot water mixing apparatus which concerns on other embodiment.

  Hereinafter, the hot and cold water mixing apparatus according to the present embodiment will be specifically described with reference to the drawings. First, a hot and cold water mixing faucet provided with a hot and cold water mixing apparatus according to this embodiment will be described.

  As shown in FIG. 1, in a faucet body 3 of a hot and cold water mixing faucet 2 provided in a bathroom or the like, a hot water and water mixing device 1 according to this embodiment includes a flow path switching device and a flow rate adjusting device (both not shown). ) And the like.

  The hot water / water mixing faucet 2 includes a hot water supply leg 4 that supplies hot water to the faucet body 3 from a water heater (not shown), and a water supply leg 5 that supplies tap water to the faucet body 3. The temperature control dial 6 attached to the left end portion of the faucet body 3 and the spouting water switching handle 7 attached to the right end portion are provided.

  The hot and cold water mixing faucet 2 is provided with a currant 8 and a shower head 9 which are discharge parts for discharging hot water, water, or temperature-controlled mixed hot water, and are supplied from the hot water supply leg 4 and the water supply leg 5, respectively. The hot water and water are mixed by the hot water / water mixing device 1 so that the temperature set by the temperature control dial 6 is reached, and the discharge water switching handle 7 is operated to discharge from the currant 8 or the shower head 9. Has been. What is shown by the code | symbol 9a is the hose which connects the faucet body 3 and the shower head 9 in communication.

  That is, by rotating the discharge water switching handle 7 attached to the faucet body 3, the flow path switching device built in the faucet body 3 is operated, and the water stop state, the water discharge state from the currant 8, The water discharge state from the shower head 9 can be switched. When the discharge water switching handle 7 is rotated to the side of the currant 8, the hot water mixed at an appropriate temperature by the hot water / water mixing device 1 is discharged from the currant 8, and when the discharge water switching handle 7 is rotated to the shower side, the appropriate temperature is reached. The mixed hot water is discharged from the shower head 9.

  Further, the temperature control dial 6 is operated to change the position of a main valve body 15 (described later) built in the hot water / mixer 1 by operating the hot water / mixer 1 built in the faucet body 3 by turning the dial. The temperature of the mixed hot water discharged can be changed.

(First embodiment)
Hereinafter, the hot and cold water mixing apparatus 1 according to the first embodiment will be specifically described with reference to FIGS. 2 and 3.

  As shown in the figure, the hot water / water mixing device 1 includes a main body casing 20 including a first main body member 11 and a second main body member 12 screwed into the first main body member 11. A spindle 13 serving as a temperature setting operation unit interlocked with the operation of the adjustment dial 6 and a sliding member 14 that is screwed into the spindle 13 and slides within the first main body member 11 when the spindle 13 is rotated are housed. It is arranged.

  Further, in the main body casing 20, one end portion 16 a is inserted into the shaft body receiving hole portion 13 e formed in the spindle 13, and the other end portion 16 b is inserted into the guide cylinder 12 b formed in the end surface 12 c of the second main body member 12. The shaft body 16 extending over the first main body member 11 and the second main body member 12, and the shaft body 16 is fitted to the center of the shaft body 16 and connected to the shaft body 16 by the connecting metal members 30 and 30. Thus, a substantially cylindrical main valve body 15 which is slidable in the main body casing 20 is provided.

  Further, the hot and cold water mixing apparatus 1 includes a bias spring 17 as a biasing portion that biases the main valve body 15 in the right direction in FIG. 2 and a main valve in the left direction in FIG. 2 opposite to the bias spring 17. A first temperature sensing spring 18 that is a first temperature sensing biasing unit that biases the body 15 and a second temperature sensing spring 19 are provided. Note that each of the first temperature-sensitive spring 18 and the second temperature-sensitive spring 19 uses a coil spring formed of a shape memory alloy (SMA; Shape Memory Alloy). And the urging | biasing force with respect to the main valve body 15 by these 1st, 2nd temperature sensitive springs 18 and 19 shall increase with temperature, and shall decrease with temperature decreasing.

  As shown in FIGS. 2 and 3, the first main body member 11 has a substantially cylindrical shape and is screwed with the second main body member 12 to constitute the main body casing 20 of the hot and cold mixing device 1. Further, a hot water inlet 21 for allowing hot water to flow in and a water inlet 22 for flowing water are provided in the circumferential direction on the peripheral surface of the first main body member 11. Further, the left end surface of the hot water inlet 21 in FIG. 2 is formed as a hot water side valve seat 23 that contacts the main valve body 15.

  The second main body member 12 is also formed in a substantially cylindrical shape, and the male screw portion 12a formed on the outer peripheral surface of the front end side is changed to the female screw portion 11a formed on the inner peripheral surface of the rear end portion of the first main body member 11. The first body member 11 is attached by being screwed together. Further, on the inner surface of the rear end wall of the second main body member 12, a guide cylinder 12 b that slidably guides the other end portion 16 b of the shaft body 16 connected to the main valve body 15 is provided in the main body casing 20. A plurality of mixed water outlets 25 for allowing the mixed water to flow out are formed in an annular shape.

  As shown in FIG. 2, the distal end surface of the second main body member 12 is formed as a water-side valve seat 24 that comes into contact with the main valve body 15. For this reason, the space | interval of the hot water side valve seat 23 and the water side valve seat 24 can be adjusted by changing the screwing amount which screws the 2nd main body member 12 in the 1st main body member 11. FIG.

  The spindle 13 is rotatably disposed inside the first main body member 11 via a packing 13d. A spline portion 13a for interlocking connection with the temperature control dial 6 is formed on the shaft portion 13c formed on one half portion of the spindle 13, while the other half portion is formed on the outer peripheral surface of the sliding member 14. A feed male screw portion 13b that is screwed with the feed female screw portion 14b is formed, and a shaft body receiving hole portion 13e that holds the one end portion 16a of the shaft body 16 so as to freely enter and exit is formed inside. Note that a fastener 11b that can give a click feeling to the rotation of the spindle 13 is attached to the shaft portion 13c.

  The sliding member 14 slidably disposed inside the first main body member 11 is formed in a substantially cylindrical shape, and the insertion hole 14a through which the shaft body 16 is inserted has one side end surface (the right end surface in FIG. 2). ). The feed female screw portion 14b that is screwed with the feed male screw portion 13b of the spindle 13 is formed on the inner surface thereof. Thus, when the spindle 13 is rotated, the sliding member 14 is slid in the axial direction of the first main body member 11.

  The main valve body 15 includes a valve main body portion 15a formed in a substantially cylindrical shape and a shaft body 16 connected in a state of being inserted through the central portion of the valve main body portion 15a. Hot water and water flowing into the main body casing 20 from the inlet 21 and the water inlet 22 are rectified and guided to the mixed water outlet 25 side through the outside of the first temperature sensing spring 18.

  In addition, a hot water side valve portion 15 b that contacts the hot water side valve seat 23 and a water side valve portion 15 c that contacts the water side valve seat 24 are formed at both ends of the valve main body portion 15 a. Then, a shaft body engaging portion 15d is formed inside the valve body portion 15a, and the shaft body engaging portion 15d is sandwiched between connecting fittings 30 and 30 provided on the shaft body 16, so that the valve body The part 15a and the shaft body 16 are connected.

  Further, an O-ring 26 that is an elastic seal member is disposed so as to contact the outer periphery of the valve main body 15a. The O-ring 26 prevents hot water and water flowing into the main body casing 20 from being mixed outside the main valve body 15.

  Further, a spacer ring 27 as a position restricting member is arranged on the water side valve seat 24 side so that the O-ring 26 is not displaced. As shown in FIG. 3, the spacer ring 27 has protruding claw portions 28 protruding at predetermined intervals, and water flows from between the protruding claw portions 28, 28. At that time, the convex claw portion 28 causes a rectifying action to promote uniform mixing of water and hot water in the main body casing 20.

  By the way, the shaft body 16 is provided with a washer 31 serving as a spring seat of the bias spring 17 and a spring seat 32 of the second temperature-sensitive spring 19 in a predetermined position, in addition to the connection fittings 30 and 30. A bias spring 17 is disposed between the shaft body engaging portion 15 d of the main valve body 15 and the washer 31.

  Further, a position restricting body 40 with one end (right side in FIG. 2) abutting on the guide cylinder 12 b provided on the second main body member 12 and passing through the shaft body 16 is disposed inside the main valve body 15. . In the present embodiment, the second temperature-sensitive spring 19 that is a main part of the present embodiment is disposed between the tip surface of the position restricting body 40 and the spring seat 32 so as to be positioned inside the bias spring 17. is doing.

  As shown in FIG. 2, the second temperature sensitive spring 19 is disposed at a water side valve portion 15 c formed on the main valve body 15 that is in contact with and separated from the water side valve seat 24 formed on the second main body member 12. Rather than the hot water inlet 21 side. In particular, in the present embodiment, the second temperature sensing spring 19 is provided on the hot water inlet 21 side of the O-ring 26 that prevents hot water and water from being mixed outside the main valve body 15. Therefore, the second temperature-sensitive spring 19 disposed at such a position does not touch water or mixed hot water but touches only hot water, and therefore generates an urging force corresponding to the temperature of the hot water.

  On the other hand, between the shaft body engaging portion 15d of the main valve body 15 and the end surface 12c of the second main body member 12 so as to face the second temperature sensitive spring 19 and the bias spring 17, the first temperature sensitive temperature is detected. The spring 18 is disposed so as to surround the guide cylinder 12b and the position restricting body 40.

  Both the first temperature-sensitive spring 18 and the second temperature-sensitive spring 19 are provided with the main valve body 15 in the direction opposite to the bias spring 17, that is, the direction in which the hot water inlet 21 is closed (left direction in FIG. 2). The first temperature sensing spring 18 generates a biasing force according to the temperature of the mixed hot water in which hot water and water are mixed.

  As shown in FIG. 3, the position restricting body 40 includes a ring portion 41 and three leg portions 42 projecting at a predetermined interval in the circumferential direction of the ring portion 41. . And the shaft body engaging part 15d of the main valve body 15 is located in the gap | interval 43 formed between the adjacent leg parts 42 and 42. FIG. Therefore, the main valve body 15 is not inhibited from sliding by the position restricting body 40.

  Further, on the outside of the main body casing 20, a strainer 62, which is formed in a cylindrical shape so as to cover the hot water inlet 21 and the water inlet 22 through packings 61, 61, 61, and in which a large number of meshes are formed. 62 is arranged to prevent hot water or dust mixed in water from flowing into the main body casing 20.

  As described above, the hot water / water mixing device 1 according to this embodiment includes the main body casing 20 in which the hot water inlet 21, the water inlet 22, and the mixed water outlet 25 from which the mixed hot water flows out are formed, A spindle 13 for setting a target temperature of the mixed hot water to be discharged is provided. The supplied hot water and water are mixed, and the mixed hot water adjusted to the temperature set by the spindle 13 can be discharged. Moreover, each is disposed in the main body casing 20, moves in the main body casing 20, adjusts the opening degree of the hot water inlet 21 and the water inlet 22, and controls the flow rates of hot water and water flowing into the main body casing 20. The main valve body 15 to be changed, the bias spring 17 that generates a biasing force that moves the main valve body 15 in one direction, that is, the direction in which the water inlet 22 is closed, according to the operation amount of the spindle 13, and the bias spring The first temperature-sensitive spring 18 that generates a biasing force that moves the main valve body 15 in a direction opposite to that of the valve 17 and that changes according to the temperature of the mixed hot water flowing into the main body casing 20 and mixed therein. And an urging force that slides the main valve body 15 in a direction opposite to the bias spring 17 in accordance with the temperature of hot water that flows into the main body casing 20 and that is supplied from, for example, a water heater. It has a configuration comprising a second temperature-sensitive spring 19.

  Therefore, when the temperature adjustment dial 6 is turned to rotate the spindle 13 and the sliding member 14 slides to the right side in FIG. 2, the bias spring 17 has the washer 31 and the shaft body engaging portion 15 d of the main valve body 15. The main valve body 15 is urged in a direction to close the water inlet 22 while contracting between the two. The biasing force by the first temperature sensing spring 18 generated corresponding to the biasing force, the temperature of the mixed hot water at this time, and the biasing force generated by the second temperature sensing spring 19 corresponding to the temperature of the hot water at this time. The main valve body 15 stops at a position where the power balances, and the mixed hot water at the temperature specified by the temperature adjustment dial 6 is discharged.

  In recent years, when the temperature of hot water is adjusted, the temperature of the hot water supply tap (not shown) is adjusted instead of the temperature adjustment dial 6 of the hot water mixing tap 2, and the hot water temperature supplied to the hot water mixing tap 2 is adjusted. Changing itself is increasing. That is, the hot water normally used is around 40 ° C., but in order to produce 40 ° C. hot water with the hot water mixing apparatus 1, for example, it is generally adjusted to 40 ° C. by mixing water with 60 ° C. hot water. Was done. That is, it was based on the fact that hot water supply at 60 ° C. was performed. However, if hot water of 60 ° C. is accidentally discharged as it is in a kitchen or the like, it is dangerous. Therefore, the hot water temperature itself from the water heater is set to 40 ° C. by remote control operation or the like.

  However, when the hot water supply temperature reaches 40 ° C., the water flowing into the main body casing 20 from the water inlet 22 cannot be completely blocked due to the configuration of the hot water / water mixing device 1, so that the water is mixed with the 40 ° C. hot water. In some cases, mixed hot water of about 36 ° C. is discharged.

  Therefore, in the present embodiment, as described above, the second reaction that reacts only with the temperature of hot water flowing into the main body casing 20 from the hot water inlet 21 and biases the main valve body 15 in the opposite direction to the bias spring 17. A temperature sensitive spring 19 is provided.

Table 1 shows hot water mixing apparatus 1 based on the case where the hot water supply temperature is 60 ° C., and when the temperature set using temperature control dial 6 is 40 ° C., hot water supply from a water heater (not shown) A change in the degree of biasing force of the bias spring 17, the first temperature sensing spring 18, and the second temperature sensing spring 19 when the temperature changes is shown. In addition, as a reference | standard of water supply temperature, it shall be 15 degreeC, for example.

  When the hot water supply temperature is 60 ° C., assuming that the biasing force degree of the bias spring 17 is 80, for example, the degree of each biasing force of the first temperature sensing spring 18 and the second temperature sensing spring 19 is as shown in Table 1. And 60 and 20 are set in advance. That is, the bias spring 17 is set so that the first temperature sensitive spring 18 and the second temperature sensitive spring 19 are balanced.

  When the hot water / water mixing device 1 actually has 60 ° C. hot water supply and 15 ° C. water supply, each biasing force of the bias spring 17, the first temperature sensing spring 18, and the second temperature sensing spring 19 is the mixed hot water. Balanced at a position where the temperature becomes 40 ° C., mixed hot water of 40 ° C. can be discharged from the hot / cold water faucet 2 (FIG. 1).

  However, for example, it is assumed that the user operates the water heater to lower the hot water supply temperature to 40 ° C. (the temperature adjustment dial 6 of the hot and cold water mixing tap 2 remains at 40 ° C.). As described above, when the hot water supply temperature reaches 40 ° C., with a conventional hot water / water mixing device, the bias spring and the temperature sensitive spring are balanced at a temperature of 40 ° C. or less, and for example, mixed hot water of about 36 ° C. is discharged. However, as shown in Table 1, the degree of the urging force of the second temperature-sensitive spring 19 changes from 20 to 10, for example, when the hot water supply is 40 ° C. Further, the degree of the urging force of the first temperature sensing spring 18 also changes from about 60 to 55, for example. On the other hand, the bias spring 17 remains 80 because it is a value corresponding to the operation amount of the temperature adjustment dial 6.

  Then, since the degree of the biasing force of the bias spring 17 is larger than the sum of the first and second temperature sensing springs 18 and 19, the main valve body 15 is pushed by the biasing force from the bias spring 17 and the water flow Sliding in the direction of closing the inlet 22, that is, in the direction of the water side valve seat 24, the opening area of the water inlet 22 is reduced and the amount of water inflow is reduced. Raise. That is, finally, the sum of the biasing force of the bias spring 17 and the biasing forces of the first and second temperature-sensitive springs 18 and 19 is balanced, and approaches 40 ° C as much as possible, such as 38 ° C to 39 ° C. It is.

  Thus, the bias spring 17 that generates the urging force that moves the main valve body 15 in the direction toward the water-side valve seat 24 according to the operation amount of the temperature adjustment dial 6, and the bias spring 17 are in the opposite direction. A first temperature-sensitive spring 18 that generates a biasing force for moving the main valve body 15 and changes in accordance with the temperature of the mixed hot water flowing into the main body casing 20 and mixed therein, and the inside of the main body casing 20 In accordance with the temperature of hot water flowing into the water, that is, the hot water supply temperature, the second temperature sensing spring 19 that generates a biasing force that slides the main valve body 15 in the direction opposite to the bias spring 17 is provided. Even if the hot water supply temperature is lowered, the temperature drop of the mixed hot water actually discharged can be prevented as much as possible.

  Moreover, although the second temperature sensitive spring 19 is arranged coaxially with the bias spring 17, it is completely independent of the bias spring 17, and has no relation to the set temperature of the temperature control dial 6. Since it reacts only with hot water, the spring length does not greatly expand and contract, and there is no possibility of shortening the life.

  Also, for example, if the user operates the water heater to raise the hot water supply temperature to 80 ° C. (the temperature adjustment dial 6 of the hot and cold water mixing tap 2 remains at 40 ° C.), this is the opposite In addition, although the temperature of the mixed hot water sometimes exceeded 40 ° C., as shown in Table 1, the second temperature-sensitive spring 19 has a degree of urging force of, for example, 20 when the hot water supply reaches 80 ° C. From 30 to 30 and the degree of the urging force of the first temperature-sensitive spring 18 changes from 60 to 65, for example. On the other hand, since the bias spring 17 has a value corresponding to the operation amount of the temperature adjustment dial 6 and remains 80, the degree of the biasing force of the bias spring 17 is that of the first and second temperature sensitive springs 18 and 19. The main valve body 15 is pushed by the urging force from the first and second temperature sensing springs 18 and 19 to close the hot water inlet 21, that is, in the direction of the hot water side valve seat 23. In order to reduce the inflow amount of hot water by sliding and reducing the opening area of the hot water inlet 21, the temperature of the mixed hot water is lowered slightly, and finally the biasing force of the bias spring 17 and the first The sum of the urging forces of the second temperature-sensitive springs 18 and 19 is balanced and is as close to 40 ° C. as possible.

  Moreover, the characteristic of the 2nd temperature sensing spring 19 in this embodiment is set so that the reaction temperature range may include a high temperature range equal to or higher than the reaction temperature range of the first temperature sensing spring 18. That is, in FIG. 4A, if the reaction temperature range of the first temperature sensitive spring 18 is, for example, a range of T1 to T2, the reaction temperature range of the second temperature sensitive spring 19 is, for example, T1 to T3, or T2 to T2. It is set in the range of T3.

  By doing in this way, for example, when the hot water / water mixing faucet 2 is used, the temperature is changed from a normally used hot water supply temperature (for example, 60 ° C.) to a high temperature such as 80 ° C. However, since the reaction temperature range of the second temperature-sensitive spring 19 is not at least lower than the reaction temperature range of the first temperature-sensitive spring 18, the temperature can be adjusted sharply without problems.

  Next, hot and cold water mixing apparatuses 1A to 1C according to other embodiments will be described with reference to FIGS. In the following description, the same components as those of the previous embodiment are denoted by the same reference numerals, and the description thereof is omitted.

(Second Embodiment)
Fig.5 (a) is a longitudinal cross-sectional view of the hot-water mixing apparatus 1A shown in 2nd Embodiment, FIG.5 (b) is explanatory drawing of 15 A of main valve bodies in this embodiment.

  As shown in the figure, the hot and cold water mixing apparatus 1A is configured such that the shaft body 16 is eliminated and the second temperature sensing spring 19 directly contacts the main valve body 15A to transmit the urging force. Further, in the present embodiment, a position restricting portion 110 corresponding to the position restricting body 40 (see FIG. 2) in the first embodiment is protruded from the end face 12c of the second main body member 12.

  The position restricting portion 110 has a diameter smaller than that of the first tubular portion 154 formed in the main valve body 15A, which will be described later, so that the second temperature-sensitive spring 19 can be accommodated, and the distal end portion is in the first tubular portion 154. I try to face it. In addition, the position of the tip is substantially the same as the position of the O-ring 26 provided to prevent hot water and water from mixing.

  The main valve body 15A in this embodiment is basically the same as that of the first embodiment in that it is substantially cylindrical, but as shown in FIG. 5B, an end surface 151 in which a water passage hole 156 is formed. The first cylindrical wall 154 is formed to house the second temperature sensitive spring 19 by standing up the first peripheral wall 152, and the first cylindrical portion 154 is connected to the second cylindrical portion 153 having a larger diameter. It is the composition joined via.

  The bias spring 17 is configured to be fitted in a space formed between the first tube portion 154 and the second tube portion 153, and the hot water inlet 21 is provided on the peripheral surface of the first tube portion 154. A communication hole 157 is formed for allowing the side and the portion in which the first temperature-sensitive spring 18 is accommodated to pass through the water hole 156.

  With this configuration, when the second temperature sensitive spring 19 is accommodated in the first tube portion 154 and the base end (the right end portion in FIG. 5) is brought into contact with the position restricting portion 110, the second temperature sensitive spring 19 is heated. Only hot water flowing in from the inflow port 21 is touched, and an urging force corresponding to the temperature of the hot water is generated. On the other hand, the 1st temperature sensing spring 18 touches the mixed hot water with which hot water and water were mixed, and generate | occur | produces the urging | biasing force according to the temperature.

  Also in the second embodiment, when the hot water supply temperature is lowered, the temperature drop of the mixed hot water actually discharged can be prevented as much as possible. The second temperature-sensitive spring 19 is completely independent of the bias spring 17 and has no relation to the set temperature of the temperature control dial 6 and reacts only to hot water. There is no. Therefore, since the lifetime does not decrease and the temperature-sensitive performance does not deteriorate, the lifetime of the hot and cold mixing device 1 itself is not shortened.

(Third embodiment)
Next, a hot water mixing apparatus 1B according to the third embodiment will be described with reference to FIG. Also in this case, the same components as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the hot and cold water mixing apparatus 1B shown in FIG. 6, the second temperature sensitive spring 19 is different from the first temperature sensitive spring 18, and as shown in FIG. It is greatly different from the first and second embodiments in that it decreases by becoming and increases by lowering the temperature.

  And in this embodiment, while connecting the one side edge part (right side edge part in FIG. 6) of the 2nd temperature sensing spring 19 to the seat part 159 formed in the main valve body 15, the other side edge part (in FIG. 6). The left end portion) is connected and fixed to the inner wall surface of the first main body member 11.

  Therefore, since the change of the urging force to the main valve body 15 with respect to the temperature change of the hot water is the same as the first and second embodiments as a result, also in this embodiment, when the hot water supply temperature is lowered, It is possible to prevent as much as possible a decrease in the temperature of the mixed hot water discharged to. The second temperature sensitive spring 19 is completely independent of the bias spring 17 and has no relation to the set temperature of the temperature adjustment dial 6 and reacts only to hot water. There is nothing to do. Therefore, since the lifetime does not decrease and the temperature-sensitive performance does not deteriorate, the lifetime of the hot and cold mixing device 1 itself is not shortened.

  As shown in the figure, in the present embodiment, a spring accommodating cylinder 50 that slides inside the second body member 12 is disposed, and the first temperature-sensitive spring 18 is disposed in the spring accommodating cylinder 50. The urging force due to the expansion and contraction of the first temperature sensing spring 18 is transmitted to the main valve body 15 via the spring accommodating cylinder 50. The contact between the spring accommodating cylinder 50 and the main valve body 15 is performed through a plurality of blades 55 curved in a sectional view.

  Therefore, the mixed hot water passing through the inside of the main valve body 15 is rectified by the blade plate 55 while reaching the spring accommodating cylinder 50 so that the hot water and water are mixed more uniformly. Therefore, since the first temperature-sensitive spring 18 reacts to the temperature of the mixed hot and cold water that is uniformly mixed, the temperature adjustment performance can be improved.

(Fourth embodiment)
Next, a hot and cold water mixing apparatus 1C according to the fourth embodiment will be described with reference to FIG. In this case as well, the same components as those in the above-described embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIG. 7A, the hot water / water mixing apparatus 1C is greatly different from the above-described embodiments, in which the first temperature sensing spring 18 and the second temperature sensing spring 19 are independently provided. Instead of this, a temperature sensing spring 180 in which a second temperature sensing region 18B corresponding to the second temperature sensing spring 19 and a first temperature sensing region 18A corresponding to the first temperature sensing spring 18 are integrally formed is arranged. It is in having established.

  In addition, the temperature-sensitive spring 180 is disposed closer to the hot water inlet 21 than the water-side valve portion 15c formed on the main valve body 15C that contacts and separates from the water-side valve seat 24 formed on the second body member 12. ing. Moreover, at least a part of the second temperature sensing region 18B has a hot water flow more than the O-ring 26 disposed between the hot water inlet 21 and the water inlet 22 in order to prevent the hot water and water from mixing. It arrange | positions so that it may be located in the entrance 21 side. Accordingly, in the second temperature sensing region 18B disposed at such a position, only the hot water is touched without touching the water or the mixed hot water, so that an urging force corresponding to the temperature of the hot water is generated.

  In this case as well, in consideration of the characteristics shown in FIG. 4A, if the reaction temperature range of the first temperature sensing region 18A is, for example, T1 to T2, the reaction temperature of the second temperature sensing region 18B. For example, the range may be set to a range of T1 to T3 or T2 to T3.

  Further, as shown in FIG. 7B, the main valve body 15C in the present embodiment is basically substantially cylindrical, which is the same as the first to third embodiments, but is illustrated. Thus, the first peripheral wall 152C is erected on the end surface 151C in which the water passage hole 156C is formed to form the first cylindrical portion 154C that houses the bias spring 17, and so as to surround the first cylindrical portion 154C. A large-diameter second cylinder portion 153C is erected, and a temperature-sensitive spring 180 can be fitted in a space formed between the first cylinder portion 154C and the second cylinder portion 153C. Further, a third cylinder part 158C having a diameter larger than that of the second cylinder part 153C is joined via a connecting body 155C so as to surround the second cylinder part 153C. In addition, a communication hole 157C is formed on the peripheral surface of the first cylindrical portion 154C so that the hot water inlet 21 side and the portion of the first temperature sensing region 18A communicate with each other via the water passage hole 156C.

  Even in such a configuration, when the hot water supply temperature is lowered, the temperature drop of the mixed hot water actually discharged can be prevented as much as possible. Further, the temperature sensing spring 180 having the second temperature sensing region 18B is naturally independent of the bias spring 17, and is not related to the set temperature of the temperature adjustment dial 6. Therefore, since it does not expand and contract by the operation by the spindle 13, the life is not reduced and the temperature sensitive performance is not deteriorated. Further, the service life of the hot and cold mixing device 1 itself is not shortened.

  Furthermore, since one temperature-sensitive spring 180 in which the first temperature-sensitive region 18A and the second temperature-sensitive region 18B are integrated is used, the number of components is relatively higher than in the first to third embodiments. Therefore, the structure can be simplified.

  From the embodiment described above, the following hot and cold water mixing device that can mix the supplied hot water and water and discharge the mixed hot water adjusted to the temperature set by the temperature control dial 6 can be realized.

  That is, the main body casing 20 in which the hot water inlet 21, the water inlet 22, and the mixed water outlet 25 from which the mixed hot water flows out is formed, and the spindle 13 (setting operation unit) for setting the target temperature of the mixed hot water to be discharged. And the flow rate of hot water and water flowing into the main casing 20 by adjusting the opening of the hot water inlet 21 and the water inlet 22 by moving in the main casing 20. And a bias spring 17 (biasing portion) that generates a biasing force that moves the main valve body 15 in a direction (one side direction) for closing the water inlet 22 in accordance with the amount of operation of the spindle 13. ) And a biasing force that moves the main valve body 15 in a direction opposite to the bias spring 17 (direction in which the hot water inlet 21 is closed), and this biasing force flows into the main body casing 20. The first temperature sensing spring 18 (first temperature sensing urging portion) that changes in accordance with the temperature of the mixed hot water mixed and the bias spring 17 in the opposite direction depending on the temperature of the hot water flowing into the main body casing 20. And a second temperature-sensitive spring 19 (second temperature-sensitive biasing portion) that generates a biasing force that causes the main valve body 15 to slide.

  The bias spring 17 (biasing portion) generates a biasing force that slides the main valve body 15 in a direction that increases the flow rate of hot water flowing into the main body casing 20, and the first and second temperature-sensitive springs 18 and 19. Generates a biasing force that causes the main valve body 15 to slide in a direction that increases the flow rate of water flowing into the main body casing 20, and the reaction temperature range of the second temperature sensing spring 19 is the first temperature sensing spring 18. A hot water mixing apparatus having a high temperature range equivalent to or higher than the reaction temperature range (for example, T1 to T3 or T2 to T3 in FIG. 4A).

  One end of the second temperature sensing spring 19 (second temperature sensing urging portion) is brought into contact with the main body casing 20 side, and the other end is brought into contact with the main valve body 15 directly or indirectly via a transmission member. A hot and cold water mixing device that allows the main valve body 15 to slide in the direction opposite to the bias spring 17 with an urging force corresponding to the temperature of the hot water flowing into the main body casing 20.

  A first temperature sensing region 18A corresponding to the first temperature sensing spring 18 (first temperature sensing biasing portion) and a second temperature sensing region corresponding to the second temperature sensing spring 19 (second temperature sensing biasing portion). 18B includes a temperature-sensitive spring 180 (temperature-sensitive member) integrally formed with 18B, and at least the second temperature-sensitive region 18B is in contact with and separated from the water-side valve seat 24 formed in the second main body member 12. A hot and cold water mixing device disposed closer to the hot water inlet 21 than the water side valve portion 15 c formed in the body 15.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to each embodiment mentioned above, In the range of the summary of this invention described in the claim, various deformation | transformation are carried out.・ Change is possible.

1 Hot and cold water mixing device 13 Spindle (temperature setting operation unit)
15 Main valve (valve)
17 Bias spring (biasing part)
18 1st temperature sensing spring (1st temperature sensing urging part)
18A First temperature sensing region 18B Second temperature sensing region 19 Second temperature sensing spring (second temperature sensing biasing portion)
20 Main body casing 21 Hot water inlet 22 Water inlet 25 Mixed water outlet 26 O-ring (seal member)
180 Temperature-sensitive spring (temperature-sensitive member)

Claims (4)

A main body casing formed with a hot water inlet, a water inlet, and a mixed water outlet from which the mixed hot water flows out, and a setting operation unit for setting a target temperature of the mixed hot water to be discharged. In the hot and cold water mixing apparatus for mixing the water and discharging the mixed hot water adjusted to the temperature set by the setting operation unit,
Each disposed in the body casing,
A valve body that moves through the main body casing to adjust the opening of the hot water inlet and the water inlet, and changes the flow rate of hot water and water flowing into the main body casing,
An urging unit that generates an urging force to move the valve body in one direction according to an operation amount of the setting operation unit;
A first temperature sensing unit that generates a biasing force that moves the valve body in a direction opposite to that of the biasing portion and that changes according to the temperature of the mixed hot water that flows into the main body casing and is mixed. An energizing section;
A second temperature-sensing urging portion that generates a urging force that slides the valve body in a direction opposite to the urging portion according to the temperature of hot water flowing into the main body casing;
A hot and cold water mixing apparatus comprising: The urging portion generates an urging force that slides the valve body in a direction that increases the flow rate of hot water flowing into the main body casing,
The first and second temperature-sensing urging portions generate an urging force that slides the valve body in a direction that increases the flow rate of water flowing into the main body casing.
In addition, the reaction temperature range of the second temperature-sensing urging unit is a range including a high temperature region equal to or higher than the reaction temperature range of the first temperature-sensing urging unit. The hot water mixing apparatus as described.   One end of the second temperature-sensing urging portion is brought into contact with the main body casing side, while the other end is brought into contact with the valve body directly or indirectly via a transmission member to flow into the main body casing. The hot / cold water mixing device according to claim 1, wherein the valve body is slidable in a direction opposite to the urging portion with an urging force corresponding to the temperature of the urging portion.   A temperature sensing member in which a first temperature sensing region corresponding to the first temperature sensing biasing portion and a second temperature sensing region corresponding to the second temperature sensing biasing portion are integrally formed; The second temperature sensing region is arranged closer to the hot water inlet side than the water side valve portion formed on the valve body contacting and separating from the water side valve seat formed on the main body casing. The hot and cold water mixing apparatus according to claim 1 or 2.

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