JP2021023663A - Cold water discharge device - Google Patents

Abstract

To provide a cold water discharge device capable of securing a hot water discharge quantity and a cold water discharge quantity while inhibiting the device from being large-sized.SOLUTION: A cold water discharge device 10 for performing discharge to a discharge port D8 on the downstream side in the case that supply water is hot water and performing discharge from a cold water discharge port A in the case of cold water includes: a temperature sensitive first selector valve body 14 that changes a distribution destination to a discharge flow passage D7 or a first cold water discharge flow passage D3 depending on expansion/contraction in a pipe axis direction due to variations in temperature of the supply water: and a diaphragm type second selector valve body 17 across the discharge flow passage D7 and a second cold water discharge flow passage D9 connecting the discharge port D8 with the cold water discharge port A. The second selector valve body 17 is changed over to: a cold water discharge mode M1 of opening the second cold water discharge flow passage D9 while closing the discharge flow passage D7 using spring force to enable remaining water on the downstream side of the discharge port D8 to be discharged to the cold water discharge port A by action of gravity; and a hot water discharge mode of closing the second cold water discharge flow passage D9 while opening the discharge flow passage D7 using pressure of hot water flowing in the discharge flow passage D7 to enable the hot water to be discharged to the discharge port D8.SELECTED DRAWING: Figure 6

Description

The present invention relates to a cold water discharge device. More specifically, the present invention relates to a chilled water discharge device that discharges the hot water to a discharge port on the downstream side when the supply water is hot water of a set temperature or higher, and discharges the cold water from a chilled water discharge port when the cold water is lower than the set temperature. ..

Conventionally, it is known that a shower facility for ejecting temperature-controlled hot water to a user is provided with a cold water discharge device capable of discharging cold water in a pipe at the initial stage of use to the outside (Patent Document 1). The cold water discharge device has a configuration in which a temperature sensitive valve that switches the distribution destination of hot water by expanding and contracting due to a temperature change is embedded in a discharge flow path through which hot water flows.

Japanese Unexamined Patent Publication No. 3-18332

In the above-mentioned conventional technique, the temperature sensitive valve is provided so as to expand and contract in the pipe axis direction of the discharge flow path in order to suppress the increase in size of the device. The discharge flow path has a small diameter structure that extends in the pipe axis direction in a narrow gap between the temperature sensitive valve and the outer case while crossing the temperature sensitive valve in the middle. Further, for the above reason, the discharge flow path whose distribution destination is switched by the temperature sensitive valve is also configured to have a small diameter. Therefore, it is not possible to sufficiently secure the discharge flow rate of hot water and the discharge flow rate of cold water. Therefore, the present invention provides a cold water discharge device capable of appropriately securing the discharge amount of hot water and the discharge amount of cold water at the initial stage of use while suppressing the increase in size of the device.

In order to solve the above problems, the cold water discharge device of the present invention takes the following means.

That is, the cold water discharge device of the present invention discharges the hot water to the discharge port on the downstream side when the supply water is hot water above the set temperature, and discharges the cold water to the cold water discharge port when the cold water is below the set temperature. It is a cold water discharge device that discharges from. This cold water discharge device has a feeling of switching between a discharge flow path connecting the supply water to the discharge port and a first cold water discharge flow path connecting to the cold water discharge port due to expansion and contraction in the pipe axis direction due to a temperature change of the supply water. It has a hot-type first switching valve body and a diaphragm-type second switching valve body provided across the second chilled water discharge flow path and the discharge flow path that connect the discharge port and the chilled water discharge port. ..

The second switching valve body opens the second chilled water discharge flow path while closing the discharge flow path by a spring force so that the residual water on the downstream side from the discharge port can be discharged to the chilled water discharge port by gravitational action. It can be switched between a cold water discharge mode and a hot water discharge mode in which the discharge flow path is opened by the pressure at which hot water flows through the discharge flow path and the second cold water discharge flow path is closed so that hot water can be discharged to the discharge port. ..

According to the above configuration, the diaphragm type second switching valve body straddling the discharge flow path and the second chilled water discharge flow path is chilled water by spring force when the supply water passing through the first switching valve body is cold water. It is held in the discharge mode. Therefore, the cold water is discharged from the first cold water discharge flow path opened by the temperature-sensitive first switching valve body, and the residual water (cold water, etc.) remaining ahead of the discharge port is also discharged from the second switching valve. It is discharged by gravitational action from the second cold water discharge channel opened by the body.

On the other hand, when the supply water passing through the first switching valve body is hot water, the second switching valve body is switched to the hot water discharge mode by the pressure at which the hot water flows through the discharge flow path. As a result, the hot water is discharged from the discharge port without being discharged from the cold water discharge port.

In this way, the diaphragm type second switching valve body opens and closes the two flow paths (discharge flow path and second cold water discharge flow path) depending on the pressure change depending on whether hot water flows in the discharge flow path. It is possible to rationalize the valve mechanism by making the configuration in which the above controls are performed collectively. As a result, it is possible to obtain a configuration in which the discharge amount of hot water and the discharge amount of cold water can be appropriately secured while suppressing the increase in size of the cold water discharge device.

Further, the cold water discharge device of the present invention may be further configured as follows. Both the expansion / contraction direction of the first switching valve body and the movable direction of the second switching valve body are set in a direction intersecting the gravity direction. The discharge flow path is connected to the branch flow path provided with the first switching valve body in a direction intersecting the pipe axis direction.

According to the above configuration, hot water can flow in the direction of intersection rather than the direction of the pipe axis of the branch flow path. Therefore, hot water can flow to the discharge port in a shorter flow path.

Further, the cold water discharge device of the present invention may be further configured as follows. The expansion / contraction direction of the first switching valve body and the movable direction of the second switching valve body are parallel to each other.

According to the above configuration, the cold water discharge device can be formed more compactly.

Further, the cold water discharge device of the present invention may be further configured as follows. The first chilled water discharge flow path is connected to the branch flow path in the pipe axis direction.

According to the above configuration, the first chilled water discharge flow path can be provided so as not to be bulky in the direction intersecting the pipe axis direction with respect to the branch flow path.

Further, the cold water discharge device of the present invention may be further configured as follows. The upstream supply port and the discharge port for supplying the supply water to the chilled water discharge device are arranged in a straight line in the direction intersecting the expansion / contraction direction of the first switching valve body.

According to the above configuration, the supply pipe and the discharge pipe connected to the cold water discharge device can be provided straight without being eccentric to each other. Therefore, the cold water discharge device can be easily incorporated into the existing piping equipment installed so that the piping extends straight.

It is a front view which showed the schematic structure of the cold water discharge device which concerns on 1st Embodiment. It is a perspective view of the cold water discharge device. It is a partial cross-sectional perspective view showing the internal structure of a chilled water discharge device. FIG. 3 is an enlarged view of part IV of FIG. It is an enlarged view of V part of FIG. It is sectional drawing corresponding to FIG. 3 which showed the state of each valve at the time of chilled water supply. It is sectional drawing corresponding to FIG. 3 which showed the state of each valve at the time of hot water supply.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

<< First Embodiment >>
(About the schematic configuration of the cold water discharge device 10)
First, the configuration of the cold water discharge device 10 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 7. In the following description, when each direction such as front-back, up-down, left-right, etc. is shown, it means each direction shown in each figure.

As shown in FIG. 1, the cold water discharge device 10 according to the present embodiment is provided on a hot water supply path from the mixing faucet 1 attached to the wall surface W of the bathroom to the overhead shower head 6. Specifically, the cold water discharge device 10 is connected to the mixing faucet 1 in a flow path and extends upward to the shower supply pipe 4, and is connected to the shower supply pipe 4 in a flow path to the connection port with the shower head 6. It is provided at the connection portion with the shower discharge pipe 5 extending upward toward the shower.

The mixing faucet 1 has a function of internally mixing and discharging hot water and water supplied from the back side of the wall surface W. Specifically, the mixed faucet 1 has a wall surface via a hot water supply pipe 3A and a water supply pipe 3B having an eccentric shape in which two left and right rear portions of the faucet main body 2 are bent in a crank shape, respectively. It is configured to be connected to a hot water connection port (not shown) formed at two locations on the left and right on the W.

The mixing faucet 1 has a temperature control function for internally adjusting the mixing ratio of the supplied hot water, a switching function for switching the discharge stop of the mixed hot water, and an adjustment of the discharge amount for adjusting the amount of the discharged hot water. It has a function. The adjustment of the mixing ratio of hot water and water is performed by operating a substantially cylindrical temperature control handle 2A attached to the side portion on the left side of the faucet body 2.

Further, the switching of the discharge stop water and the adjustment of the discharge amount are performed by operating the substantially cylindrical switching handle 2B attached to the side portion on the right side of the faucet main body 2. Specifically, when the user adjusts the temperature control handle 2A to a desired rotation position, the mixing ratio of the hot water mixed inside the faucet body 2 is adjusted to the set temperature according to the above rotation position. ..

Further, when the user turns the switching handle 2B upward or downward from a predetermined water stop position (shown position), a shower head in which an amount of hot water corresponding to the amount of rotational movement is connected to the faucet main body 2 as a flow path. It is selectively discharged from 6 or Karan 7. In the present embodiment, the switching handle 2B is turned upward to discharge hot water from the shower head 6, and the switching handle 2B is turned downward to discharge hot water from the curan 7.

The cold water discharge device 10 has a function of discharging the cold water in the pipe to the outside so that the cold water remaining in the pipe at the initial stage of use is not ejected to the user when the hot water is discharged from the shower head 6 by operating the switching handle 2B. To be equipped. Hereinafter, the specific configuration of the cold water discharge device 10 will be described in detail.

(Specific configuration of cold water discharge device 10)
As shown in FIG. 2, the cold water discharge device 10 has a vertically long substantially box shape extending in the front-rear direction as a whole. The cold water discharge device 10 is configured such that the upper end portion of the shower supply pipe 4 described above is connected to the lower end portion by a flow path, and the lower end portion of the shower discharge pipe 5 described above is connected to the upper end portion by a flow path. .. The shower supply pipe 4 and the shower discharge pipe 5 are respectively configured to be connected to the cold water discharge device 10 at positions on the same axis.

Specifically, as shown in FIG. 3, the cold water discharge device 10 is provided with a partition wall 12 for partitioning an internal space and various pipes inside the device main body 11 having a vertically long substantially box shape. , The structure is such that an internal flow path is formed. In the following description, the main pipes provided in the chilled water discharge device 10 will be described with reference numerals, but the other pipes will not be indicated with reference numerals, and instead, the flow paths associated with the pipes will be attached. And openings will be described with reference numerals. Each flow path or opening provided in the chilled water discharge device 10 is indicated by enclosing a symbol in a square.

The cold water discharge device 10 has a supply port D1 having a downward opening connected to the upper end of the shower supply pipe 4 at the lower end thereof. Further, the cold water discharge device 10 has a discharge port D8 having an upward opening connected to the lower end of the shower discharge pipe 5 at the upper end thereof. Further, the chilled water discharge device 10 has chilled water discharge ports A (D4, D10) having a rearward opening for discharging chilled water to the outside at two locations above and below the rear end portion.

Further, the cold water discharge device 10 has a branch flow path D2 for branching the flow path in the rear direction and the upward direction at an upper position on the downstream side of the supply port D1. Further, the chilled water discharge device 10 has a first chilled water discharge flow path D3 that is connected to a flow path branched to the rear side of the branch flow path D2 and is connected to the chilled water discharge port D4 on the rear side.

Further, the chilled water discharge device 10 has a chilled water pressure flow path D5 that is branched upward from the first chilled water discharge flow path D3. Further, the chilled water discharge device 10 has a chilled water pressure chamber D6 which is connected to the chilled water pressure flow path D5 and exerts pressure on the diaphragm type second switching valve body 17 described later.

Further, the cold water discharge device 10 has a discharge flow path D7 which is connected to a flow path branched on the upper side of the branch flow path D2 and is connected to a discharge port D8 on the upper side. Further, the chilled water discharge device 10 has a second chilled water discharge flow path D9 connecting the discharge port D8 and the chilled water discharge port D10 on the rear side.

The discharge flow path D7 and the second cold water discharge flow path D9 communicate with each other, but the switching operation of the second switching valve body 17 always closes one of the intermediate flow paths and opens the other. It is said to be a relationship. The cold water discharge ports D4 and D10 are provided at positions lower than the discharge ports D8.

The branch flow path D2 is formed by a circular tubular branch pipe 13 that directs the pipe axis direction in the front-rear direction. The branch pipe 13 has a pipe shaft opening 13A for opening the rear end portion and a pipe wall opening 13B for opening the pipe wall portion. The pipe shaft opening 13A forms a flow path branched to the rear side of the branch flow path D2, and communicates with the first cold water discharge flow path D3.

The pipe wall opening 13B is formed in the pipe wall region directly above the supply port D1 and functions as an intake port for taking a part of the hot water supplied from the supply port D1 into the branch pipe 13. A part of the hot water flowing upward from the supply port D1 is taken into the branch pipe 13, but the other part of the hot water flows through the branch pipe 13 to the discharge flow path D7.

The cold water discharge device 10 further has a first switching valve body 14 set in the branch pipe 13. The first switching valve body 14 includes a temperature-sensitive valve mechanism that autonomously expands and contracts in the direction of the pipe axis as the temperature of hot water taken into the branch pipe 13 changes.

Specifically, as shown in FIG. 4, the first switching valve body 14 includes a shaft portion 14A extending in the pipe axis direction, an on-off valve 14B assembled at the rear end of the shaft portion 14A, and an on-off valve 14B. It has a temperature-sensitive spring 14C made of a shape memory alloy that exerts a spring force in the valve closing direction (rear direction), and a bias spring 14D that exerts a spring force in the valve opening direction (forward direction) on the on-off valve 14B. The shaft portion 14A is supported from the outer peripheral side by a hollow disk-shaped intermediate seat portion 14E fixed to the branch pipe 13 so that the intermediate portion in the axial direction can slide only in the pipe axial direction. ..

Further, the shaft portion 14A is also supported from the outer peripheral side so that the front end portion thereof can also slide with respect to the device main body 11 only in the pipe axis direction. The on-off valve 14B is made of a rubber hollow disk-shaped member. The on-off valve 14B is passed through the rear end portion of the shaft portion 14A from the rear side, and is joined to the rear end portion of the coaxial portion 14A on the rear surface portion of the flange portion 14F which projects in a radial direction. It is joined in a superposed manner.

The temperature-sensitive spring 14C is composed of a spring member wound in a coil shape, is passed through a shaft portion 14A, and is set between the flange portion 14F on the rear end side and the intermediate seat portion 14E. As a result, the temperature-sensitive spring 14C is configured to apply a spring force (elastic force) to the rear side on the flange portion 14F on the rear end side of the shaft portion 14A with the intermediate seat portion 14E as a fulcrum. The temperature-sensitive spring 14C has a characteristic of changing the hardness according to the temperature of hot water taken into the branch pipe 13.

Specifically, the temperature-sensitive spring 14C has a hardness that overcomes the spring force of the bias spring 14D when the supply water taken into the branch pipe 13 is hot water having a set temperature (for example, 35 degrees) or higher. Inflates in the axial direction. As a result, the on-off valve 14B is pressed against the rear end of the branch pipe 13, and the pipe shaft opening 13A is closed.

On the other hand, when the supply water taken into the branch pipe 13 is cold water having a temperature lower than the set temperature, the temperature-sensitive spring 14C becomes soft and flexes by the spring force of the bias spring 14D and contracts in the pipe axis direction. .. As a result, the on-off valve 14B is pulled away from the rear end of the branch pipe 13 by the spring force of the bias spring 14D, and the pipe shaft opening 13A is opened.

The bias spring 14D is also composed of a spring member wound in a coil shape, and is a flange that is passed through the shaft portion 14A and is formed in the vicinity of the front end of the intermediate seat portion 14E and the shaft portion 14A and projects in a radial direction. It is set between the part 14G. As a result, the bias spring 14D is configured to apply a spring force (elastic force) to the front side on the flange portion 14G on the front end side of the shaft portion 14A with the intermediate seat portion 14E as a fulcrum.

As shown in FIG. 3, the chilled water discharge device 10 is further provided in an intermediate flow path on the downstream side branched from the chilled water pressure flow path D5 of the first chilled water discharge flow path D3, and reaches the chilled water discharge port D4. The constant flow rate valve 15 for keeping the discharge flow rate of the above constant is provided. By controlling the pressure of the fixed quantity flow valve, the pressure of the chilled water flowing from the chilled water pressure flow path D5 to the chilled water pressure chamber D6 is maintained so as to have a certain magnitude or more. Rectifiers 16A and 16B are mounted on the cold water discharge ports D4 and D10 to regulate the discharge of cold water by combining nets and grid-like parts to prevent scattering.

The cold water discharge device 10 further has a diaphragm type second switching valve body 17 set across the discharge flow path D7 and the second cold water discharge flow path D9. As shown in FIG. 6, the second switching valve body 17 has a chilled water discharge mode M1 that opens the second chilled water discharge flow path D9 while closing the discharge flow path D7 by the pressure of the chilled water applied to the chilled water pressure chamber D6. As shown in FIG. 7, a diaphragm type that can be switched to a hot water discharge mode M2 that closes the second cold water discharge flow path D9 while opening the discharge flow path D7 by the pressure of the hot water flowing through the discharge flow path D7. It is equipped with a valve mechanism.

As shown in FIG. 5, the second switching valve body 17 is formed in a circular tubular chilled water discharge relay pipe 19 that forms an intermediate flow path of the second chilled water discharge flow path D9 and is directed in the front-rear direction. It is set through the. Specifically, the second switching valve body 17 includes a shaft portion 17A extending in the pipe axial direction, an on-off valve 17B attached to the rear end portion of the shaft portion 17A, and a diaphragm assembled to the front end portion of the shaft portion 17A. It has 17C and a pressure adjusting spring 17D that applies a spring force in the valve opening direction (forward direction) to the diaphragm 17C.

The shaft portion 17A is supported from the outer peripheral side by a throttle-shaped small diameter portion 19A formed in the cold water discharge relay pipe 19 so that an intermediate portion in the axial direction can slide only in the pipe axial direction. The on-off valve 17B is made of a rubber hollow disk-shaped member. The on-off valve 17B is passed through the rear end portion of the shaft portion 17A from the rear side, and is also passed through the rear end portion of the flange portion 17E which is joined to the vicinity of the rear end portion of the coaxial portion 17A and projects in a radial direction. It is joined in a superposed manner.

The diaphragm 17C is made of a rubber thin film member. The diaphragm 17C is passed through the front end of the shaft portion 17A from the front side, and is overlapped with the front portion of the flange portion 17F which is joined to the vicinity of the front end of the coaxial portion 17A and projects in a disc shape in the radial direction. It is joined. The diaphragm 17C is provided so as to face the pipe shaft opening 18A on the rear end side of the circular tubular discharge relay pipe 18 that forms the middle flow path of the discharge flow path D7 and faces the pipe axis direction in the front-rear direction.

The diaphragm 17C has a wall surface of the flow path from the discharge flow path D7 to the pipe shaft opening 18A at a position where the peripheral edge thereof is separated from the pipe shaft opening 18A on the rear end side of the discharge relay pipe 18 to the rear side. It is joined to the partition wall 12 of the apparatus main body 11 so as to form. As a result, the diaphragm 17C separates the discharge flow path D7 and the chilled water pressure chamber D6.

The pressure adjusting spring 17D is composed of a spring member wound in a coil shape, is passed through a shaft portion 17A, and is set between the small diameter portion 19A and the flange portion 17F on the front end side. As a result, the pressure adjusting spring 17D is configured to apply a spring force (elastic force) to the front side on the flange portion 17F on the front end side of the shaft portion 17A with the small diameter portion 19A as a fulcrum. As shown in FIG. 6, the diaphragm 17C receives the pressure action of the chilled water pressure chamber D6 when the chilled water pressure chamber D6 is pressed by the above spring force, and the diaphragm 17C receives the pressure action to the pipe shaft opening 18A on the rear end side of the discharge relay pipe 18. Pressed from the rear side, the pipe shaft opening 18A is closed.

At that time, the on-off valve 17B integrally with the diaphragm 17C is also moved to the front side, and the on-off valve 17B is pulled away from the pipe shaft opening 19B on the rear end side of the cold water discharge relay pipe 19 to the front side to open the pipe shaft. Open 19B. As a result, the second switching valve body 17 opens the second cold water discharge flow path D9 by the on-off valve 17B while closing the discharge flow path D7 by the diaphragm 17C, and downstream from the discharge port D8 to the shower head 6 and the like. The cold water discharge mode M1 is set so that the residual water remaining on the side can be discharged to the cold water discharge port D10 by the action of gravity.

On the other hand, as shown in FIG. 7, when hot water is flowed through the discharge flow path D7, the diaphragm 17C is pushed to the rear side against the spring force of the pressure adjusting spring 17D by the pressure, and the pipe shaft opening 18A is opened. At that time, the on-off valve 17B integrally with the diaphragm 17C is also moved to the rear side, and the on-off valve 17B is pressed against the pipe shaft opening 19B on the rear end side of the cold water discharge relay pipe 19 to open the pipe shaft opening 19B. Close the valve. As a result, the second switching valve body 17 closes the second cold water discharge flow path D9 by the on-off valve 17B while opening the discharge flow path D7 by the diaphragm 17C, and discharges hot water to the discharge port D8. The hot water discharge mode M2 is set.

As shown in FIG. 5, the discharge relay pipe 18 and the chilled water discharge relay pipe 19 are provided side by side at positions on the same axis extending in the front-rear direction. The discharge relay pipe 18 allows hot water taken in from the pipe shaft opening 18A on the rear end side to flow from the opening on the front end side to the downstream side. The chilled water discharge relay pipe 19 takes in the chilled water flowing through the second chilled water discharge flow path D9 from the pipe wall opening 19C opening in the pipe wall portion into the pipe and flows it from the pipe shaft opening 19B on the rear end side to the downstream side.

(About the flow of cold water discharge)
Subsequently, the flow of cold water discharge when the supply water supplied to the cold water discharge device 10 is cold water having a temperature lower than a set temperature (for example, 35 degrees) will be described. In that case, cold water is flowed in the flow shown by the thin thick arrow in FIG. The thin thick-painted arrows roughly represent the flow of cold water discharge, and in reality, cold water and residual water flow through the flow paths and openings in the pipes through which the arrows pass.

That is, first, when the cold water flows into the branch flow path D2 through the supply port D1, the temperature-sensitive first switching valve body 14 opens the pipe shaft opening 13A on the rear end side of the branch pipe 13. , Cold water flows out to the first cold water discharge flow path D3 and the cold water pressure flow path D5. Then, the cold water flowing into the first cold water discharge flow path D3 is discharged to the outside from the cold water discharge port D4.

Further, the chilled water that has flowed into the chilled water pressure flow path D5 flows into the chilled water pressure chamber D6, and a pressure from the rear is applied to the diaphragm 17C of the second switching valve body 17. As a result, the second switching valve body 17 closes the pipe shaft opening 18A on the rear end side of the discharge relay pipe 18 and opens the pipe shaft opening 19B on the rear end side of the cold water discharge relay pipe 19 to discharge cold water. The mode is M1.

As a result, the flow of cold water flowing from the supply port D1 through the branch flow path D2 to the discharge flow path D7 is stopped by the intermediate flow path closed by the diaphragm 17C, and the discharge to the discharge port D8 is stopped. Be blocked. Further, the residual water remaining on the downstream side of the shower head 6 or the like from the discharge port D8 is discharged to the outside from the chilled water discharge port D10 through the second chilled water discharge flow path D9 by the action of gravity.

(About the flow of hot water discharge)
Subsequently, the flow of hot water discharge when the supply water supplied to the cold water discharge device 10 is hot water having a set temperature (for example, 35 degrees) or higher will be described. In that case, hot water is flowed in the flow shown by the thick black arrow in FIG. The thick black arrow also schematically represents the flow of hot water discharge, and in reality, hot water flows through the flow path or opening in each pipe through which the arrow passes.

That is, first, when the hot water flows into the branch flow path D2 through the supply port D1, the temperature-sensitive first switching valve body 14 closes the pipe shaft opening 13A on the rear end side of the branch pipe 13. As a result, the hot water flowing through the branch flow path D2 and flowing to the discharge flow path D7 exerts a pressure from the front on the diaphragm 17C and pushes the diaphragm 17C backward against the spring force.

As a result, the second switching valve body 17 opens the pipe shaft opening 18A on the rear end side of the discharge relay pipe 18 and closes the pipe shaft opening 19B on the rear end side of the cold water discharge relay pipe 19 to discharge hot water. The mode is M2. As a result, the hot water flowing through the branch flow path D2 is discharged to the discharge port D8 through the discharge relay pipe 18. At that time, the hot water that has flowed from the discharge flow path D7 into the second chilled water discharge flow path D9 is prevented from flowing out to the outside by closing the pipe shaft opening 19B on the rear end side of the chilled water discharge relay pipe 19.

As described above, when the supply water is hot water above the set temperature, the cold water discharge device 10 discharges the hot water to the discharge port D8 on the downstream side, and when the cold water is below the set temperature, the cold water is discharged. The cold water can be discharged from the cold water discharge ports A (D4, D10).

(Summary)
Summarizing the above, the cold water discharge device 10 according to the first embodiment has the following configuration. In the following, the reference numerals given in parentheses are the reference numerals corresponding to the respective configurations shown in the above embodiments. That is, when the supply water is hot water above the set temperature, the hot water is discharged to the discharge port (D8) on the downstream side, and when the cold water is below the set temperature, the cold water is discharged to the cold water discharge port (A (D4)). ) Is a cold water discharge device (10).

This cold water discharge device (10) has a discharge flow path (D7) and a cold water discharge port (A (D4)) that connect the flow destination of the supply water to the discharge port (D8) by expanding and contracting in the pipe axis direction with the temperature change of the supply water. )), A temperature-sensitive first switching valve body (14) that switches to the first cold water discharge flow path (D3) connected to), and a flow path between the discharge port (D8) and the cold water discharge port (A (D10)). It has a diaphragm type second switching valve body (17) provided across the second chilled water discharge flow path (D9) and the discharge flow path (D7) to be connected.

The second switching valve body (17) opens the second chilled water discharge flow path (D9) while closing the discharge flow path (D7) by a spring force to remove residual water on the downstream side from the discharge port (D8). A cold water discharge mode (M1) that enables discharge to the cold water discharge port (A (D10)) by gravitational action, and a pressure that allows hot water to flow through the discharge flow path (D7) while opening the discharge flow path (D7). 2 It is switched to a hot water discharge mode (M2) in which the cold water discharge flow path (D9) is closed so that hot water can be discharged to the discharge port (D8).

According to the above configuration, the diaphragm type second switching valve body (17) straddling the discharge flow path (D7) and the second cold water discharge flow path (D9) is supplied with water passing through the first switching valve body (14). When is cold water, it is held in the cold water discharge mode (M1) by the spring force. Therefore, the cold water is discharged from the first cold water discharge flow path (D3) opened by the temperature-sensitive first switching valve body (14), and the residual water remaining ahead of the discharge port (D8) (D8). Cold water, etc.) is also discharged by gravitational action from the second chilled water discharge flow path (D9) opened by the second switching valve body (17).

On the other hand, in the second switching valve body (17), when the supply water passing through the first switching valve body (14) is hot water, the hot water discharge mode (M2) is performed by the pressure at which the hot water flows through the discharge flow path (D7). ). As a result, the hot water is discharged from the discharge port (D8) without being discharged from the cold water discharge port (A (D4, D10)).

In this way, the diaphragm type second switching valve body (17) allows two flow paths (discharge flow path (D7) and second cold water discharge) depending on the pressure change depending on whether hot water flows in the discharge flow path (D7). The valve mechanism can be rationalized by collectively controlling the valve opening and closing of the flow path (D9)). As a result, it is possible to obtain a configuration in which the discharge amount of hot water and the discharge amount of cold water can be appropriately secured while suppressing the increase in size of the cold water discharge device (10).

Further, the expansion / contraction direction of the first switching valve body (14) and the movable direction of the second switching valve body (17) are both set in a direction intersecting the gravity direction. The discharge flow path (D7) is connected to the branch flow path (D2) provided with the first switching valve body (14) in a direction intersecting the pipe axis direction. According to the above configuration, hot water can flow in the direction of intersection rather than the direction of the pipe axis of the branch flow path (D2). Therefore, hot water can flow to the discharge port (D8) in a shorter flow path.

Further, the expansion / contraction direction of the first switching valve body (14) and the movable direction of the second switching valve body (17) are parallel to each other. According to the above configuration, the cold water discharge device (10) can be formed more compactly.

Further, the first chilled water discharge flow path (D3) is connected to the branch flow path (D2) in the pipe axis direction. According to the above configuration, the first chilled water discharge flow path (D3) can be provided so as not to be bulky in the direction intersecting the pipe axis direction with respect to the branch flow path (D2).

Further, the upstream supply port (D1) and the discharge port (D8) for supplying the supply water to the cold water discharge device (10) are on a straight line in the direction intersecting the expansion / contraction direction of the first switching valve body (14). It is said that they are arranged side by side. According to the above configuration, the supply pipe (4) and the discharge pipe (5) connected to the cold water discharge device (10) can be provided straight without being eccentric to each other. Therefore, the cold water discharge device (10) can be easily incorporated into the existing piping equipment installed so that the piping extends straight.

<< About other embodiments >>
Although the embodiments of the present invention have been described above using one embodiment, the present invention can be implemented in various embodiments shown below in addition to the above embodiments.

1. 1. The cold water discharge device of the present invention may be provided on a hot water supply path connecting a mixing faucet and a shower head of a hand-held so-called hand shower. Further, the discharge device connected to the downstream side of the cold water discharge device may be a discharge device other than the shower. The cold water discharge device is also provided on the hot water supply path from the mixing faucet attached to a place other than the wall surface of the bathroom such as a kitchen or a wash basin.

2. 2. The temperature-sensitive first switching valve body may be provided with the expansion / contraction direction facing the height direction in the construction state of the cold water discharge device. Similarly, the diaphragm type second switching valve body may be provided so that the movable direction thereof faces the height direction in the construction state of the cold water discharge device. The expansion / contraction direction of the first switching valve body and the movable direction of the second switching valve body do not necessarily have to be arranged so as to be parallel to each other, but are arranged so as to have a twisting relationship with each other. Is also good.

3. 3. The discharge flow path and the first chilled water discharge flow path intersect with the pipe axis direction even if they are connected to the branch flow path provided with the first switching valve body in the pipe axis direction, respectively. It does not matter whether the flow path is connected in the direction.

4. The supply port and the discharge port may be provided at positions where they are not aligned with each other. The supply port, the discharge port, and the cold water discharge port may be provided so as to open in either direction in the construction state of the cold water discharge device.

5. The temperature-sensitive first switching valve body may be configured to expand and contract in the pipe axis direction as the temperature of the supply water changes due to the action of the wax type thermoelement. The set temperature for discharging cold water by the first switching valve body is appropriately set freely, and is not limited to a specific temperature.

1 Mixing faucet 2 Faucet body 2A Temperature control handle 2B Switching handle 3A Hot water supply pipe 3B Water supply pipe 4 Shower supply pipe 5 Shower discharge pipe 6 Shower head 7 Flange 10 Cold water discharge device 11 Device body 12 Section wall 13 Branch pipe 13A Pipe shaft Opening 13B Pipe wall opening 14 1st switching valve body 14A Shaft 14B On / off valve 14C Temperature sensitive spring 14D Bias spring 14E Intermediate seat 14F Flange part 14G Flange part 15 Constant flow valve 16A Rectifier 16B Rectifier 17 2nd switching valve body 17A Shaft Part 17B On-off valve 17C Diaphragm 17D Pressure regulating spring 17E Flange part 17F Flange part 18 Discharge relay pipe 18A Pipe shaft opening 19 Cold water discharge relay pipe 19A Small diameter part 19B Pipe shaft opening 19C Pipe wall opening D1 Supply port D2 Branch flow path D3 Cold water discharge flow path D4 Cold water discharge port D5 Cold water pressure flow path D6 Cold water pressure chamber D7 Discharge flow path D8 Discharge port D9 Second chill water discharge flow path D10 Cold water discharge port A Cold water discharge port M1 Cold water discharge mode M2 Hot water discharge mode W Wall surface

Claims (5)

A cold water discharge device that discharges the hot water to the discharge port on the downstream side when the supply water is hot water above the set temperature, and discharges the cold water from the cold water discharge port when the cold water is below the set temperature. ,
A temperature-sensitive type that switches the distribution destination of the supply water between a discharge flow path connecting to the discharge port and a first cold water discharge flow path connected to the cold water discharge port by expanding and contracting in the pipe axis direction due to a temperature change of the supply water. 1st switching valve body and
A diaphragm-type second switching valve body provided straddling the second chilled water discharge flow path and the discharge flow path that connect the discharge port and the cold water discharge port, and the discharge flow path is provided by a spring force. A cold water discharge mode in which the second cold water discharge flow path is opened to allow the residual water on the downstream side from the discharge port to be discharged to the cold water discharge port by the action of gravity, and the hot water is discharged. The second switching that can be switched to a hot water discharge mode in which the second cold water discharge flow path is closed while the discharge flow path is opened by the pressure flowing through the flow path so that the hot water can be discharged to the discharge port. A cold water discharge device having a valve body. The cold water discharge device according to claim 1.
The expansion / contraction direction of the first switching valve body and the movable direction of the second switching valve body are both set in a direction intersecting the gravity direction, and the discharge flow path is provided with the first switching valve body. A cold water discharge device connected to a branch flow path in a direction intersecting the pipe axis direction. The cold water discharge device according to claim 2.
A cold water discharge device in which the expansion / contraction direction of the first switching valve body and the movable direction of the second switching valve body are parallel to each other. The cold water discharge device according to claim 2 or 3.
A chilled water discharge device in which the first chilled water discharge flow path is connected to the branch flow path in the pipe axis direction. The cold water discharge device according to any one of claims 2 to 4.
A cold water discharge device in which an upstream supply port for supplying the supply water to the cold water discharge device and the discharge port are arranged in a straight line in a direction intersecting the expansion / contraction direction of the first switching valve body.

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