JPS6141373B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a method for supplying low-temperature hot water for general hot water supply from a hot water supply device such as a water heater or a boiler to a tap for general hot water supply. In addition, when supplying high-temperature fluid (high-temperature hot water or steam) for reheating the water stored in the bathtub from the water heater, the high-temperature fluid is supplied selectively from a single pipe to the bathtub. Regarding the hot water supply switching valve used to switch the supply route between low-temperature hot water for general hot water supply and high-temperature fluid for reheating, in detail, the fluid inlet is communicated with the low-temperature outlet connected to the hot water tap for general hot water supply. An operating tool is provided for selectively switching the valve body between a low-temperature hot water supply state and a high-temperature fluid supply state for reheating bathtub water in which the fluid inlet is communicated with a high-temperature outlet connected to the bathtub;
In order to prevent the high-temperature fluid remaining in the pipe line upstream of the switching valve from being unexpectedly fed from the low-temperature outlet when switching to the low-temperature hot water supply state side, the operation tool The present invention relates to a hot water supply switching valve that is provided with a delay mechanism that delays switching of the valve body to a low temperature hot water supply state in response to a switching operation to a low temperature hot water supply state.

[Conventional technology]

Conventionally, in the hot water supply switching valve as described above, the valve body is controlled by the fluid pressure on the fluid inlet side (i.e.,
The system is configured to switch between a low-temperature hot water supply state and a high-temperature fluid supply state, respectively, against the feed pressure from the hot water supply device.

Further, the delay mechanism is configured to simply delay the completion of the switching operation of the valve body to the low temperature hot water supply state by a certain period of time in response to the switching operation of the operating tool. (For example, see Utility Model Publication No. 52-25724.) [Problem to be solved by the invention] However, when switching to the low-temperature hot water supply state, the fluid pressure on the fluid inlet side is transferred to the bathtub via the high-temperature outlet. The required force for operating the valve body is small because it is performed in a state where the low-temperature outlet is open, but when switching to the high-temperature fluid supply state, the general hot water tap connected to the low-temperature outlet is closed. In other words, when the fluid pressure on the fluid inlet side is strongly applied to the valve body which is in the state of supplying low-temperature hot water, a large valve body operating force is required to operate the valve body against the fluid pressure. Therefore, the switching operation to the high-temperature fluid supply state side becomes considerably difficult, and it is necessary to install a boosting mechanism such as a cam or lever, or a biasing mechanism such as a spring in the valve body operation configuration. Even if we try to reduce the required operating force for the operating tool, the amount of operation required for the operating tool will increase, and furthermore, the boosting mechanism and biasing mechanism will have to be large enough to accommodate the large valve body operating force. This posed the problem of increasing the overall size of the switching valve.

On the other hand, even if a delay mechanism is used to prevent high-temperature fluid remaining in the pipe from being unexpectedly fed from the low-temperature outlet, at the time of switching to the low-temperature hot water supply state, the upstream side of the switching valve It is uncertain at what temperature and how much high-temperature fluid remains in the pipeline, and therefore, simply delaying the switching of the valve body for a certain period of time as in the past will not be enough. If high-temperature fluid remains in the hot water supply state, the delay time is set to a long time in anticipation of a high safety factor. However, it is always necessary to wait for a long time before general hot water supply becomes possible, which reduces usability.

Furthermore, with the conventional configuration that simply delays the completion of the switching operation of the valve element to the low-temperature hot water supply state in response to the operation of the operating tool, the valve element already starts supplying low-temperature hot water immediately after the operation of the operating tool is completed. In other words, the communication cutoff between the fluid inlet and the low-temperature outlet has already been released, and therefore the high-temperature fluid is flowing into the low-temperature outlet, albeit in a small amount. However, there was still a risk that the vehicle would be shipped from another country.

The purpose of the present invention is to improve the valve operability while avoiding an increase in the size of the valve structure by rationally improving the valve body operation structure by applying a pilot valve mechanism, and also to improve the delay mechanism structure. The aim is to ensure high safety while avoiding a decrease in usability.

[Means for solving problems]

The characteristic structure of the hot water supply switching valve according to the present invention is that the fluid inlet is in communication with the low temperature outlet connected to a general hot water tap, and the fluid inlet is in communication with the high temperature outlet connected to the bathtub. In order to configure a valve body that can be selectively switched to a high temperature fluid supply state for reheating bathtub water by operating an operating tool, a low temperature valve body that connects and disconnects communication between the fluid inlet and the low temperature outlet is configured. A high-temperature valve body that is provided in conjunction with the operating tool and that disconnects communication between the fluid inlet and the high-temperature outlet is provided separately from the low-temperature valve body, and with respect to the high-temperature valve body, A biasing mechanism for biasing it toward the valve opening side and a pilot valve for releasing the fluid pressure on the fluid inlet side to the high temperature outlet side are provided, and the low temperature valve body is opened by the operating tool. Along with the operation, the pilot valve closes and the high temperature valve element closes, and as the operating tool closes the low temperature valve element, the pilot valve opens and the high temperature valve element closes. The low-temperature valve body, the high-temperature valve body, and the pilot valve are linked together so that the high-temperature valve body opens with the biasing force of the biasing mechanism when the pilot valve opens; The temperature of the high-temperature fluid flowing out to the high-temperature outlet is configured to constitute a delay mechanism that delays switching of the valve body to the low-temperature hot water supply state in response to a switching operation of the operating tool to the low-temperature water supply state. The present invention is provided with a temperature sensor that senses the temperature and prevents the low-temperature valve from opening until the sensed temperature becomes equal to or lower than the set temperature.The functions and effects of the temperature sensor are as follows.

[Effect]

In other words, when switching to the high temperature fluid supply state, if the low temperature valve body is switched to the closed side by operating the operating tool, the fluid pressure on the fluid inlet side is released to the high temperature outlet side by opening the pilot valve accordingly. The fluid pressure that had strongly built up in the high-temperature valve body in the closed state is reduced, and accordingly, the high-temperature valve body automatically opens due to the biasing force of the biasing mechanism and switches to the high-temperature fluid supply state. The wari is complete.

In other words, when switching to the high-temperature fluid supply state side, the general hot water tap is in the closed state, so the fluid pressure on the fluid inlet side is strongly applied to the high-temperature valve body in the closed state. It is separated from the high-temperature valve body, and at that time, it is only necessary to close the low-temperature valve body with the operating tool when the fluid pressure is not rising in the open state. The valve body operating force required for switching is significantly reduced.

Note that the biasing mechanism only needs to have enough biasing force to open the high-temperature valve element whose working fluid pressure is reduced by opening the pilot valve, so it is sufficient to have a biasing force that is sufficient to open the high-temperature valve element whose working fluid pressure is reduced by opening the pilot valve. Compared to the case where a biasing mechanism is attached to open the valve body against the strong fluid pressure, the biasing mechanism itself can be small.

Regarding switching to the low-temperature hot water supply state, even if the pilot valve and the high-temperature valve body are both closed when the low-temperature valve body is opened by operating the operating tool,
Furthermore, even if it is necessary to close the high-temperature valve body against the biasing force of the biasing mechanism, originally, when switching to the low-temperature hot water supply state, the fluid on the fluid inlet side Pressure is released to the bathtub side through the high temperature outlet, and there is almost no fluid pressure in the closed low temperature valve body, and furthermore, the biasing mechanism for the high temperature valve body is directed to the open side. Since the biasing force is also small due to the adoption of the pilot valve mechanism as described above, the valve body operation force required to switch to the low temperature hot water supply state is also small.

On the other hand, the delay mechanism has a temperature sensor that senses the temperature of the high-temperature fluid flowing out to the high-temperature outlet, and prevents the low-temperature valve from opening until the detected temperature falls below the set temperature. In other words, by delaying the start of the opening operation of the low-temperature valve body based on the detected temperature of the high-temperature fluid, the delay time can be adjusted depending on the temperature and amount of the high-temperature fluid remaining in the pipe. Furthermore, since the start of the opening operation of the low-temperature valve body is delayed, during the delay period, the flow of high-temperature fluid to the low-temperature outlet is controlled by the entire amount of high-temperature fluid. It can definitely be stopped.

〔Effect of the invention〕

As a result of the above, the required operating force for the valve body has been reduced for both switching to the low-temperature hot water supply state and switching to the high-temperature fluid supply state, making it possible to reduce the required operating force for the operating tool and to reduce the amount of force required to operate the operating tool. It was also possible to reduce the amount of required operation, thereby achieving improvement in valve operability.

In addition, as mentioned above, by adopting a pilot valve mechanism, the biasing mechanism for opening the valve for the high-temperature valve body can be small, and a booster mechanism or other biasing mechanism can be installed in the valve body operation configuration. However, since the required valve body operating force is reduced for both switching to the low-temperature hot water supply state and switching to the high-temperature fluid supply state, the boosting mechanism and biasing mechanism are also compact. This makes it possible to make the valve configuration more compact.

Moreover, with regard to the safety function of the delay mechanism, the self-adjustment of the delay time described above improves usability by minimizing the waiting time until general hot water supply becomes possible, while also self-adjusting the delay time. This function and the delay effect on the start of the opening operation of the low-temperature valve body ensure that high-temperature fluid is prevented from flowing to the low-temperature outlet regardless of the amount of remaining high-temperature fluid. become,
Compared to conventional hot water supply switching valves, the safety function of the delay mechanism has been enhanced to further improve safety.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

5 and 6 show the overall configuration of a hot water supply device for a bath, and FIG. 5 shows the heating of water supplied from the water supply channel W to produce low temperature hot water, and the low temperature hot water is used for hot water supply for general hot water supply. On the other hand, FIG. 6 shows a general hot water supply state in which water is supplied to the tap 50. On the other hand, FIG. A reheating state is shown in which the water stored in the bathtub is heated by ejecting water from the disposed discharge device 52 and mixing it with the water stored in the bathtub.

47 in the figure is a water heating heat exchanger as a main component of a heating device that heats water supplied from the water supply channel W to selectively generate low-temperature hot water for general hot water supply and steam for reheating. , 67 is a main burner.

In addition, as accessories for the heating device, a water drain plug 41, a check valve with a strainer 42, and a water governor 43 are interposed in the water supply channel W, as well as a water supply valve 44, a limiting orifice 45, and a steam flow rate control valve 44. Three stabilizing valves 46 are installed in parallel, and on the other hand, the fuel gas supply path G to the main burner 67 is
The thermocouple safety valve 61, which is kept open only when the pilot burner 68 is in a proper combustion state, opens only when the water supply state to the heat exchanger 47 is appropriate, by interlocking with the gas tank 62 and water governor 43. A hydraulically responsive valve 63 held in a valve state and a gas governor 64 are interposed, and both a gas valve 65 and an auxiliary gas valve 66 are interposed in parallel.

Furthermore, in the figure, 48 is an overpressure safety valve, 49 is a low temperature operation valve, and 51 is a vacuum breaker valve, each of which is a safety valve.

The discharge path from the heating device, that is, the heat exchanger 4
The discharge path from 7 has a general hot water supply flow path state (that is, a low temperature hot water supply state) in which the discharge path is communicated with the hot water tap 50 for general hot water supply, and a reheating flow path state in which the discharge path is communicated with the discharge device 52 on the bathtub 53 side. A switching valve V that selectively switches between a flow path state (that is, a high temperature fluid supply state)
is interposed.

The bathroom is equipped with a remote control handle 15 that is linked to the water supply valve 44 and the auxiliary gas valve 66 in the heating device, respectively, and the switching valve V. 15 can be performed.

That is, when the remote control handle 15 is switched to the general hot water supply side, the water supply valve 44 is opened and the auxiliary gas valve 66 is closed, and the amount of water and fuel gas supplied to the heating device (heating capacity) is The remote control handle 15 is configured so that the amount of low-temperature hot water at a predetermined temperature for general hot water supply is changed to the amount commensurate with the generation of hot water, and the switching valve V is switched to the general hot water flow path state (low temperature hot water supply state) side. When the heating device is switched to the reheating side, the water supply valve 44 is closed and the auxiliary gas valve 66 is opened, so that the amount of water and fuel gas supplied to the heating device is changed to steam at a predetermined temperature for reheating. are each switched to an amount commensurate with the generation of
The switching valve V is in the reheating flow path state (high temperature fluid supply state)
It is configured so that it can be switched to the side.

In FIGS. 5 and 6, the valves shaded in black are the valves in the closed state.

Switching the heating device and the amount of water supplied to it, and
To explain in more detail how to switch between the general hot water supply state and the reheating state by switching the fuel gas supply amount, in the general hot water supply state, since the water supply valve 44 is in the open state, a large amount of water is supplied via the water supply valve 44. Feed water is continuously supplied to the heat exchanger 47, whereas
Since the auxiliary gas valve 66 is in the closed state, only a small amount of fuel gas is supplied to the main burner 67 via the gas valve 65, and as a result, the heating capacity is small for a large amount of water, so it is not suitable for general hot water supply. Low-temperature hot water at a suitable predetermined temperature is continuously produced. On the other hand, in the reheating state, since the water supply valve 44 is in the closed state, only a limited amount of supply water is supplied to the heat exchanger 47 via the limiting orifice 45 and the steam flow rate stabilizing valve 46; Then, the fuel gas flows through the opened auxiliary gas valve 66 and the gas valve 65 parallel to it.
A large amount of steam is supplied to the main burner 67 through both the main burner 67, and as a result, high-temperature reheating steam that can effectively heat the water stored in the bathtub is continuously generated because it has a large heating capacity for a small amount of water. be done.

As for the specific configuration of the switching valve V, as shown in FIG. A high-temperature outlet 3 connected to the discharger 52 disposed in the case body A is formed in the case body A, and a first and a second
The valve seats 4 and 5 are provided in opposing positions, and a low-temperature valve body 6 cooperates with the first valve seat 4 to connect and disconnect the flow path from the fluid inlet 1 to the low-temperature outlet 2, and the second valve seat 5
High-temperature valve bodies 7 are provided to intermittent the flow path from the fluid inlet 1 to the high-temperature outlet 3 in cooperation with the high-temperature valve bodies 7.

In other words, by opening the low-temperature valve body 6 and closing the high-temperature valve body 7 by operating the remote control handle 15, the heating state is switched to the general hot water supply state by the same operation by the remote control handle 15. A general hot water supply flow path state (low temperature hot water supply state) in which low temperature hot water from the device is supplied to the general hot water tap 50 via the low temperature outlet 2 is displayed, and the low temperature valve can be opened by operating the remote control handle 15. By closing the valve body 6 and opening the high temperature valve body 7,
Similarly, the reheating flow path state (high temperature fluid supply state) in which reheating steam from the heating device, which has been switched to the reheating state by operation using the remote control handle 15, is supplied to the discharger 52 of the bathtub 53 via the high temperature outlet 3. ) is configured to appear.

The low-temperature valve body 6 and the high-temperature valve body 7 are respectively connected to a first valve shaft 10 and a second valve shaft 11 arranged on the same straight line.

The second valve shaft 11 is formed with a pilot passage 12 that communicates the fluid inlet 1 and the high temperature outlet 3 regardless of whether the high temperature valve body 7 is closed. A pilot valve 8 is connected to a first valve shaft 10 together with a low temperature valve body 6 via a valve holder 9.

The first valve shaft 10 is biased in the closing direction of the low-temperature valve body 6 by a first elastic biasing device 13 interposed between it and the case body A, while the second valve shaft 11
is slidably supported by a tube 22 connected to the case body A while ensuring a flow path within the case body A, and a support 23 screwed to the end of the tube 22.
The high temperature valve body 7 is biased in the opening direction by a second elastic biasing device 24 interposed between the high temperature valve body 7 and the second elastic biasing member 24 .

The biasing force of the second elastic biasing tool 24 is applied when the low-temperature valve body 6 is in the open state and the high-temperature valve body 7 and the pilot valve 8 are each in the closed state. When low-temperature hot water for general hot water supply is continuously supplied from the inlet 1 to the low-temperature outlet 2, the high-temperature valve body 7 closes against the second elastic biasing device 24 due to the fluid pressure of the low-temperature hot water. Further, the pilot valve 8 is maintained in the closed state of the high temperature valve body 7.
When the valve is opened and the fluid inlet 1 and the high temperature outlet 3 communicate with each other via the pilot flow path 12, the high temperature valve body 7 changes due to the change in pressure balance caused by the communication.
The valve is set to be opened by the urging force of the second elastic urging member 24.

In other words, when switching from the general hot water supply flow path state to the reheating flow path state, the first elastic biasing tool 13
The low-temperature valve body 6 is closed with a biasing force of In order to open the valve and to switch from the additional heating flow path state to the general hot water supply flow path state, the first valve shaft 1 is pressed against the first elastic biasing device 13.
0 opens the low-temperature valve body 6, and the pilot valve 8 is brought into contact with the second valve shaft 11 by pushing the pilot valve 8 into contact with the second valve shaft 11. The valve is closed against the elastic biasing member 24.

25 in the figure indicates the point in time when the remote control handle 15 is switched from the reheating state to the general hot water supply state;
This is a switching delay mechanism installed in the switching valve V in order to create a time lag between when the switching operation actually switches the switching valve V from the reheating flow path state side to the general hot water supply flow path state side, Its main components include a temperature sensor 26 such as a wax pellet that expands in volume when heated by the fluid passing from the fluid inlet 1 to the high temperature outlet 3; The second piston rod 27 expands as the piston rod 26 expands.
A high-temperature valve closing movement prevention shaft 28 that prevents the valve stem 11 from moving toward the high-temperature valve body 7 closing side, and a high-temperature valve body closing movement prevention shaft 28 that is biased back to the blocking action release side. A third biasing tool 30 is provided.

In other words, even if the remote control handle 15 is operated to switch from the reheating state to the general hot water supply state and the switching operation force to the general hot water supply state is applied to the switching valve V, in the previous reheating state, The reheating steam generated in the heating device and remaining in the heat exchanger 47 of the heating device and the discharge path from the heat exchanger 47 to the switching valve V and the high-temperature hot water that is its condensate are the fluid in the switching valve V. While flowing from the inlet 1 to the high-temperature outlet 3, the temperature sensor 26 is maintained in a volumetrically expanded state by heating with the residual reheating steam or high-temperature water, and the high-temperature valve is closed due to the volumetric expansion. The high-temperature valve body 7 is held in the open state by the displacement prevention action of the body closing motion prevention shaft 28 on the second valve shaft 11, and the second
The valve body 6 for low temperature is maintained in a closed state by the contact between the valve stem 11 and the pilot valve 8.

Then, the residual reheating steam and its condensed high-temperature hot water have completed passing from the fluid inlet 1 to the high-temperature outlet 3 of the switching valve V, and are switched to the general hot water supply state by the switching operation using the remote control handle 15. When the low-temperature hot water for general hot water supply from the heating device begins to flow from the fluid inlet 1 of the switching valve V to the high-temperature outlet 3, and accordingly, the temperature sensor 26 begins to shrink in volume, The biasing force of the third elastic biasing tool 30 causes the high-temperature valve body closing movement prevention shaft 28 to return to its original position, thereby allowing the high-temperature valve body 7 to close and the low-temperature valve body 6 to open. It's like this.

That is, even if the remote control handle 15 is operated to switch from the reheating state side to the general hot water supply state side, the temperature-sensitive type switching is delayed until the residual reheating steam or its condensed high-temperature hot water completes passing through the switching valve V. The action of the mechanism 25 prevents the switching valve V from switching to the general hot water supply flow path state, thereby preventing the residual reheating steam and its condensate from being accidentally released from the hot water tap 50. It is designed to prevent it from being discharged.

In the figure, 29 is a cylinder that supports the high-temperature valve body closure shaft 28 in a slidable manner and serves as a reaction force fulcrum for the third elastic biasing tool 30, and secures a flow path within the case body A. It is connected to the case body A in this state.

Further, 31 is an elastic shock absorber for absorbing and mitigating abnormal expansion caused by overheating of the temperature sensor 26;
The support body 32 screwed onto the case body A is formed with a recessed portion to provide flexibility for escape from behind when the temperature sensing body 26 expands abnormally.

As the operation structure 14 for the switching valve V, an eccentric cam 17 is provided which is linked to the remote control handle 15 via a remote control wire 16, and the eccentric cam 1
A push pin 18 which is pressed by the action of a rotary cam 7 and the first valve shaft 10 are interlocked with each other.

The eccentric cam 17 is activated by the push pin 18 when the remote control handle 15 is switched to the general hot water supply state.
The rotational phase is set so that the pushing action on the push pin 18 is released when the remote control handle 15 is switched to the reheating state side, and the remote control handle 15 is switched to the general hot water supply state side. When the push pin 18 is pushed in, the first
The valve stem 10 is pushed in, and the low-temperature valve body 6 is closed, and the high-temperature valve body 7 is closed, and the remote control handle 15 is switched to the reheating state and the push pin 18 is pressed. When the pushing is released, the first valve shaft 10 is moved toward the low-temperature valve body 6 by the urging force of the first elastic urging member 13.
is displaced to the closing side, thereby causing the low temperature valve body 6
is closed, and accordingly, the pilot valve 8 is closed.
When the valve is closed, the high temperature valve body 7 is opened by the urging force of the second elastic urging member 24.

Between the push pin 18 and the first valve shaft 10,
The pushing operation force applied to the push pin 18 by switching the remote control handle 15 to the general hot water supply state is applied to the first valve shaft 10 while the switching delay mechanism 25 is in the switching inhibiting state.
An operating force storage mechanism 19 is installed to accumulate the operating force as a pushing force against the reheating steam, and after the remote control handle 15 is switched from the reheating state to the general hot water supply state, the remaining reheating steam or its condensate is When the high-temperature hot water completes passing through the switching valve V and the switching prevention action of the switching delay mechanism 25 is released, the operation power storage mechanism 19 is activated by switching the remote control handle 15 to the general hot water supply state side. The accumulated urging force pushes the first valve shaft 10 and switches the switching valve V to the general hot water supply flow path state.

The specific configuration of the operating force storage mechanism 19 is such that one of the pair of supports 20 serves as a seat for the push pin 18 and is slidably fitted onto the first valve shaft 10 , and the other supports the push pin 18 . The first valve shaft 10 is fitted onto the first valve shaft 10 in a state where it is locked in the push-in operation direction, and an elastic biasing device 21 for storing force is interposed between the pair of supports 20.

In other words, when the switching delay mechanism 25 is in the switching inhibiting state and the low temperature valve body 6 is held in the closed state by contacting with the second valve shaft 11, the remote control handle 15 is moved to the general hot water supply state side. When the eccentric cam 17 pushes against the push pin 18 due to the switching operation, the push pin 18 is allowed to push due to the sliding displacement of the support 20 serving as a seat for the push pin 18, and along with the sliding displacement As the force storage elastic biasing device 21 is compressed and deformed, the pushing operation force applied to the push pin 18 is accumulated in the force storage elastic biasing device 21 .

The operating force accumulated through compressive deformation of the force storage elastic biasing device 21 is applied to the pushing operation side of the first valve stem 10 via the support 20 that is locked to the first valve stem 10. When the switching prevention action of the switching delay mechanism 25 is released, the low-temperature valve body 6 is opened against the first elastic biasing member 13 due to the above-mentioned biasing action. Due to the accompanying contact with the pilot valve 8, the high temperature valve body 7 is closed against the second elastic biasing member 24, and the switching valve V is then switched to the general hot water supply flow path state.

Hereinafter, the operation of the switching valve V will be sequentially explained based on FIGS. 1 to 4.

(A) FIG. 1 shows the state of the flow path for general hot water supply, in which the remote control handle 15 has been switched to the general hot water supply state, and the eccentric cam 17 is pushing against the push pin 18.

Then, due to the pushing action, the low temperature valve body 6 is held in the open state against the first elastic biasing member 13, and the pilot valve 8 is held in the pilot flow path 12 closed state, and further, When the high temperature valve body 7 comes into contact with the pilot valve 8, the second
The valve is held in the closed state against the elastic biasing member 24.

In this state, since there is no fluid flow from the fluid inlet 1 to the high-temperature outlet 3, the switching delay mechanism 25 is in a state in which the switching prevention action is released.

(b) Figure 2 shows the situation immediately after the remote control handle 15 is operated to switch from the general hot water supply flow path state in (a) above to the reheating state side. Eccentric cam 1 in conjunction
7 releases its pushing action on the push pin 18, and accordingly, the low temperature valve body 6 is closed by the urging force of the first elastic urging member 13, and the pilot valve 8 is opened.

At this point, the heating device has been switched to the reheating state in which reheating steam is generated by switching the remote control handle 15 to the reheating state.

(c) Figure 3 shows that the pressure balance before and after the high temperature valve element 7 changes due to the opening of the pilot valve 8 shown in (b) above, and as a result, the high temperature valve element 7 is activated by the second elastic biasing member. 24 shows the flow path state for reheating opened with the urging force of 24, and as the valve body 7 for high temperature is opened, reheating from the heating device is switched to the reheating state side by the previous operation of the remote control handle 15. Steam for fluid inlet 1
Since the flow flows from the temperature sensor to the high temperature outlet 3, the temperature sensor 26 in the switching delay mechanism 25
expands in volume, and as a result, the high-temperature valve element closing movement preventing shaft 28 is in a displacement preventing state with respect to the second valve shaft 11.

(d) Figure 4 shows the situation immediately after the remote control handle 15 is operated to switch from the reheating channel state described in (c) to the general hot water supply state, and is linked to the switching operation of the remote control handle 15 to the general hot water supply state. eccentric cam 1
7 is in a state where the push pin 18 is pushed in, but the switching delay mechanism 25 is in the switching blocking action state, and the high temperature valve body closing movement blocking shaft 28 is on the closing movement side of the high temperature valve body 7 of the second valve shaft 11. As a result, the high-temperature valve body 7 is held in the open state, and the low-temperature valve body 6 is held in the closed state through contact with the second valve shaft 11. , switching valve V
However, it is still in the reheating channel state.

Furthermore, since the low-temperature valve body 6 is held in the closed state, the pushing operation force applied to the push pin 18 is transferred to the operating force storage mechanism 19 through compressive deformation of the elastic force storage device 21. It has been accumulated.

In this state, the heating device has already been switched to the general hot water supply state by switching the remote control handle 15 to the general hot water supply state, but the remaining reheating steam or high-temperature hot water of its condensate is flowing through the fluid inlet. While the fluid is flowing from 1 to the high temperature outlet 3, the switching prevention action of the switching delay mechanism 25 continues, so that the state shown in FIG. 4 is maintained.

Then, the remaining reheating steam or its condensate high temperature hot water completes passing through the switching valve V, and the low temperature hot water for general hot water supply from the heating device that has already been switched to the general hot water supply state flows from the fluid inlet 1 to the high temperature outlet. 3, the switching delay mechanism 25
The switching prevention action is released, and the biasing force of the third elastic biasing tool 30 causes the high temperature valve element closing motion prevention shaft 28 to be closed.
is operated to return, and accordingly, the low temperature valve body 6 is opened by the urging force accumulated in the operating force storage mechanism 19, and the pilot valve 8 is closed.
Further, the high temperature valve body 7 is closed against the biasing force of the second elastic biasing tool 24, and the flow path state is changed to the general hot water supply flow path state as shown in FIG.

[Another example]

Next, another embodiment of the present invention will be described.

In the reheating state, the heating device generates high-temperature hot water,
The high-temperature hot water may be discharged from the discharge device 52 attached to the bathtub 53, and reheating may be performed by mixing the discharged high-temperature hot water and the water stored in the bathtub. Steam, high-temperature hot water for reheating, gas-liquid two-phase fluid for reheating of steam and high-temperature hot water, etc. are collectively referred to as high-temperature fluid.

The temperature sensor 26 in the temperature-sensitive switching delay mechanism 25 can be of various types, such as a temperature-sensitive bellows in addition to a wax pellet.

The specific temperature of the high-temperature fluid for reheating and the specific temperature of the low-temperature hot water for general hot water supply can be set in various ways, and the switching prevention effect of the temperature-sensitive switching delay mechanism 25 can be canceled. The set temperature can also be set in various ways as long as it is a temperature that can ensure safety between the temperature of the high temperature fluid for reheating and the temperature of the low temperature hot water for general hot water supply.

Instead of arranging the low-temperature valve element 6 and the high-temperature valve element 7 concentrically, their axes may be arranged eccentrically as shown in FIG. 7. In this case, the pilot valve 8 is attached to the low-temperature valve body 6 side, whereas the pilot flow path 12 is formed in the case body A in a state that bypasses the high-temperature valve body 7, and
The high-temperature valve body 7 has a protrusion 10' continuous from the side.
It is only necessary to press the valve to the valve closing side.

[Brief explanation of the drawing]

1 to 6 show embodiments of the present invention,
1 to 4 are sectional views sequentially showing the operation of the hot water supply switching valve, and FIGS. 5 and 6 are overall views of the hot water supply system, showing a general hot water supply state and a reheating state. FIG. 7 is an enlarged view showing another embodiment of the present invention. 1... Fluid inlet, 2... Outlet for low temperature, 3... Outlet for high temperature, 6... Valve body for low temperature, 7... Valve body for high temperature, 8... Pilot valve, 15... Operation tool, 24
... biasing mechanism, 25 ... delay mechanism, 50 ... hot water tap, 53 ... bathtub.

Claims (1)

[Claims] 1. A low temperature hot water supply state in which the fluid inlet 1 is connected to the low temperature outlet 2 connected to the hot water tap 50 for general hot water supply, and a fluid inlet 1 is connected to the high temperature outlet 3 connected to the bathtub 53. An operating tool 15 is provided to selectively switch the valve bodies 6 and 7 to a high-temperature fluid supply state for reheating bathtub water that communicates with the hot water supply state, and when the operating tool 15 is switched to a low-temperature hot water supply state The hot water supply switching valve is provided with a delay mechanism 25 that delays switching of the valve bodies 6, 7 to a low temperature hot water supply state side, the valve body 6,
7, a low-temperature valve body 6 for disconnecting communication between the fluid inlet 1 and the low-temperature outlet 2 is provided in conjunction with the operation tool 15, and the fluid inlet 1
and a high-temperature valve body 7 that interrupts communication between the high-temperature outlet 3 and the low-temperature valve body 6,
The high temperature valve element 7 is provided with an urging mechanism 24 for urging it toward the valve opening side, and a pilot valve 8 for releasing the fluid pressure on the fluid inlet 1 side to the high temperature outlet 3 side. When the low temperature valve body 6 is opened by the operating tool 15, the pilot valve 8 is closed and the high temperature valve body 7 is closed, and when the low temperature valve body 6 is opened by the operating tool 15, the pilot valve 8 is closed and the high temperature valve body 7 is closed. When the valve body 6 is closed, the pilot valve 8 is opened, and the high temperature valve body 7 is opened by the biasing force of the biasing mechanism 24 due to the opening of the pilot valve 8. The low-temperature valve body 6, the high-temperature valve body 7, and the pilot valve 8 are linked to each other,
On the other hand, the delay mechanism 25 is configured to sense the temperature of the high-temperature fluid flowing out to the high-temperature outlet 3 and prevent the low-temperature valve body 6 from opening until the sensed temperature becomes equal to or lower than a set temperature. A hot water supply switching valve equipped with a sensing element 26. 2. The valve body portion of the pilot valve 8 is integrally connected to the low temperature valve body 6, and when the low temperature valve body 6 is opened by the operation tool 15, the valve body portion of the pilot valve 8 is connected to the low temperature valve body 6. Claim 1, wherein the low temperature valve body 6 and the high temperature valve body 7 are linked together so as to press the high temperature valve body 7 toward the valve closing side.
Hot water supply switching valve described in section.