JPS6116466Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a bath heating device that reheats water stored in a bathtub by supplying high-temperature fluid to the bathtub. A heating device is provided that generates high-temperature fluid using the hot water bath, and heats the bathtub water by supplying the high-temperature fluid to a high-temperature fluid discharger disposed at the bottom of the bathtub and mixing it with the bathtub water. An operating tool for stopping the high-temperature fluid generation/heating operation is provided, and a valve device is provided for cutting off fluid supply from the heating device to the high-temperature fluid discharger in conjunction with the operation of stopping the high-temperature fluid generation/heating operation by the operating tool. Regarding a bath heating device.

Conventionally, in the bath heating device as described above, a valve device that cuts off the fluid supply from the heating device to the high temperature fluid discharger is operated at the same time as the high temperature fluid generation and heating operation of the heating device is stopped by operating the operating tool. It was configured so that it was activated to shut it off (I can't provide any references).

Problems to be Solved by the Invention However, in the conventional device as described above, scales such as CaO, MgO, and SiO accumulate in the high-temperature fluid supply path that connects the heating device and the high-temperature fluid discharger.
As a result, long-term use may lead to blockage of the pipes, or even if the pipes are not blocked, the supply of high-temperature fluid from the heating device is obstructed, resulting in a reduction in firing capacity. .

The purpose of the present invention is to provide a high-temperature fluid supply line connecting the heating device and the high-temperature fluid discharger by rationally improving the valve device that shuts off the fluid supply from the heating device to the high-temperature fluid discharger. The purpose of this invention is to effectively prevent scale accumulation.

Means for Solving the Problems A characteristic configuration of the bath heating device according to the present invention is that a high-temperature fluid discharger disposed in the bathtub from the heating device is linked to the operation of stopping the high-temperature fluid generation heating operation of the heating device using the operating tool. A fluid temperature sensing type shutoff operation that prevents the fluid supply cutoff operation of the valve device until the fluid supplied from the heating device to the high temperature fluid discharger falls below a set temperature. The reason is that a delay mechanism is attached, and its functions and effects are as follows.

In other words, even after the high-temperature fluid generation heating operation of the heating device is stopped by the operating tool, the fluid temperature-sensing shutoff operation continues until the temperature of the fluid supplied from the heating device to the high-temperature fluid discharger falls below the set temperature. Since the delay mechanism prevents the shutoff operation of the valve device, during the shutoff operation inhibited state, the low-temperature fluid (continuously supplied from the heating device to the high-temperature fluid discharger) with the function of supplying water from the water supply channel to the heating device ( The scale in the high-temperature fluid supply path is washed away by hot water whose temperature has dropped due to the termination of the high-temperature fluid generation heating operation.

Therefore, scale accumulation in the high temperature fluid supply path connecting the heating device and the high temperature fluid discharger is effectively prevented.

Effects of the idea As a result, it goes without saying that problems with pipe clogging due to scale accumulation are avoided, and a reduction in firing capacity due to the blockage of high-temperature fluid supply from the heating device due to accumulated scale is also prevented. This enabled the bath heating device to be used successfully over a long period of time.

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

Figures 5 and 6 show the overall configuration of the bath heating device, and Figure 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 being used at a hot water tap for general hot water supply. On the other hand, FIG. 6 shows a state in which water supplied from the water supply channel W is heated to generate steam as an example of high-temperature fluid, and the steam is distributed to the lower part of the bathtub 34. A reheating state is shown in which the water stored in the bathtub is heated by ejecting water from the installed discharge device 33 and mixing it with the water stored in the bathtub.

27 in the figure is a heat exchanger for water heating, as the main configuration 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. 42 is the main burner.

Further, as accessories of the heating device, a water drain plug 21, a check valve with a strainer 22, and a water governor 23 are interposed in the water supply channel W, and a water supply valve 26 for supplying water for general hot water supply, A limiting orifice 25 having an optimum throttle diameter for steam generation and a diaphragm type steam flow rate stabilizing valve 24 are installed in parallel, and on the other hand, a pilot burner is connected to a fuel gas supply path G to the burner. The thermocouple safety valve 35, which is electromagnetically held open only when the heat exchanger 43 is in a proper combustion state, works in conjunction with the gas tank 36 and the water governor 23, and only when the water supply state to the heat exchanger 27 is proper. A water pressure responsive valve 37 that automatically opens, and a gas governor 3
8 is interposed, and a gas valve 40 and an auxiliary gas valve 41 are interposed in parallel as a capacity switching valve 39 for the main burner 42.

In the figure, 28 is a pressurized safety valve for dealing with an abnormal pressure rise, and 29 is a low-temperature operating valve with a built-in thermoelement for anti-freezing.

Discharge path from the heating device, i.e. heat exchanger 2
The discharge path from 7 is a hot water supply path a for general hot water supply, which is connected to a hot water tap 32 for general hot water supply such as a mixing valve for a shower (not shown) or a faucet for hot water supply, and a discharge device disposed in the bathtub 34. 33, and the hot water supply path a for general hot water supply is equipped with a thermovalve 31 that automatically closes when the temperature of the supplied hot water exceeds a set temperature. ,
Further, each of the steam supply paths b for reheating is provided with a valve device A that connects and disconnects the steam supply path b.

The steam supply path b for reheating is connected to the discharge device 33 of the bathtub 34 after being piped up to a place higher than the highest water level in the bathtub 34, and the highest part of the steam supply path b is connected to the discharge device 33 of the bathtub 34. is equipped with a vacuum breaker valve 30 that automatically opens the supply passage b to the atmosphere when negative pressure is generated in the supply passage b to prevent the water stored in the bathtub 34 from flowing back.

A remote control panel 15 installed in the bathroom includes a thermocouple safety valve 35, a gas cock 36, and an ignition cock 16 linked to an ignition device (not shown).
It is equipped with a thermocouple safety valve 35 and a gas tank 3 by operating the ignition cock 16.
The pilot burner 43 is ignited by opening the valve 6 and activating the ignition device.

The remote control panel 15 also has a switching knob 17 interlocked with the water supply valve 26, the auxiliary gas valve 41, and the valve device A of the steam supply path b for switching the heating operation state of the heating device. It is equipped as a tool in parallel with the ignition pot 16, and when the switching pot 17 is switched to general hot water supply, as shown in FIG. 5, the water supply valve 26 is opened and the auxiliary gas valve is opened. 41 is closed, and the water supply amount and fuel gas supply amount (heating capacity) to the heating device are respectively switched to amounts commensurate with the generation of low-temperature hot water for general hot water supply, and the valve device A of the steam supply path b is In addition, the switching point 1 can be switched to the flow path cutoff state.
7 is switched to the additional heating side, as shown in FIG. 6, the water supply valve 26 is closed and the auxiliary gas valve 41 is opened, so that the amount of water and fuel gas supplied to the heating device is adjusted. , and the amount of steam commensurate with the generation of steam as the high-temperature fluid for reheating, and the valve device A of the steam supply path b is configured to be switched to the flow path open state.

In addition, in FIG. 5 and FIG. 6, the valves painted in black indicate the closed state.

In other words, as a function of this bath heating device, if the pilot burner 43 is ignited by the ignition pot 16, and the switching pot 17 is switched to the general hot water supply side, the hot water tap 32 for general hot water supply is opened. When the opening operation is performed, a large amount of water starts flowing through the water supply valve 26 to the heat exchanger 27, and when the water flow starts, the water pressure response valve 37 automatically opens, causing the main burner 42 to receive gas. valve 40
A small amount of fuel gas supply via the chisel is started and the main burner 42 is ignited, whereby low-temperature hot water at a predetermined temperature is continuously generated by the heating device and supplied to the hot water tap 32 for general hot water supply.

Also, if the switching knob 17 is switched to the reheating side while the pilot burner 43 is ignited, the steam supply path b
By switching the valve device A to the flow path open state, a small amount of water starts to flow through the limiting orifice 25 to the heat exchanger 27, and the hydraulic response valve 37 automatically opens with the start of water flow. The valve starts supplying a large amount of fuel gas to the main burner 42 via both the gas valve 40 and the auxiliary gas valve 41, and the main burner 42 ignites, thereby
Steam at a predetermined temperature as a high-temperature fluid for reheating is continuously generated by the heating device and supplied to the discharge device 33 of the bathtub 34 .

In addition, even if the hot water tap 32 for general hot water supply is opened by mistake in the reheating state, the steam jet from the hot water tap 32 for general hot water supply will be automatically closed by the thermovalve 31 installed in the hot water supply path a. This is reliably prevented.

In addition to the above-mentioned general hot water supply and additional heating, there is also a switching operation position for high temperature general hot water supply as the switching operation position of the switching pot 17. When the switching pot 17 is switched to the high temperature general hot water supply position, the water supply starts. At the same time as the valve 26 is opened, the auxiliary gas valve 41 is opened, and the water supply amount and fuel gas supply amount (heating capacity) to the heating device are respectively switched to an amount commensurate with the generation of high-temperature hot water, and the steam Valve device A of supply path b
Since the flow path is switched to the state where the flow path is blocked, high-temperature hot water can be supplied to the hot water tap 32 for general hot water supply.

Regarding the specific configuration of the valve device A installed in the steam supply path b, as shown in FIGS. The inlet 1 and the downstream part of the steam supply path b, that is, the discharge device 3 of the bathtub 34
A main valve seat 4 is formed in the valve casing 3 with a fluid outlet 2 connected to the 3 side.
A main valve element 5 is provided corresponding to the main valve seat 4.

An operating shaft 7 which is slidably supported through the valve casing 3 is slidably inserted through the shaft core of the main valve body 5, and the end of the operating shaft 7 on the main valve body side is , a locking protrusion 7a is provided for opening the main valve body 5 by operating the operating shaft toward the withdrawal side with respect to the valve casing 3, and the fluid inlet 1 and the fluid outlet 2 are connected in a state that bypasses the main valve body 5. A communicating pilot channel 8 is provided.

A pilot valve seat 5 formed on the main valve body 5
The pilot valve body 6, which closes the pilot flow path 8 by contact with the valve casing 3, is integrally connected to the operating shaft 7 so that the valve can be opened by operating the operating shaft toward the withdrawal side with respect to the valve casing 3. A spring 9 that biases the valve body 6 toward the valve closing side is interposed between the valve casing 3 and the pilot valve body 6 so as to fit around the operating shaft 7.

In addition, when the connecting position of the pilot valve body 6 with respect to the operating shaft 7 is in contact with the pilot valve seat 5a formed on the main valve body 5, the locking protrusion 7a for opening the main valve body and the main valve body 5 are connected to each other. It is determined that a floating gap of a predetermined size is formed therebetween.

In other words, as shown in FIG. 1, when the operating shaft 7 is slid toward the withdrawal side in a state in which both the main valve body 5 and the pilot valve body 6 are closed and the steam flow path b is blocked, the above-mentioned idle motion occurs. Since there is a gap, the pilot valve body 6 is first opened against the spring 9 to open the pilot flow path 8, and then, by the subsequent operation of the operating shaft 7, the locking protrusion 7a is opened against the main valve body 5.
The main valve body 5 is opened as shown in FIG. By communicating at 8, the main valve element 5 can be opened easily and smoothly while reducing the fluid pressure acting on the main valve element 5, which has a large pressure receiving area.

On the other hand, the interlocking structure of the switching knob 17 and the valve device A includes a rocking motion in which the operating shaft 7 is slid toward the withdrawal side by a locking action on a locked member 10 attached to the operating shaft 7 for opening the valve. A rotating cam 1 that is provided with a member 11 and that swings the swinging member 11.
2 and a switching knob 17 are interlocked and connected via a wire 18, and the valve device A is switched between a steam flow path b blocking state and an open state by rotation of a rotary cam linked to the switching operation of the switching knob 17. It is structured as follows.

In addition, this valve device A has a time lag between the time when the switching cock 17 is operated to switch to general hot water supply from the reheating side and the time when the valve device A actually shuts off in conjunction with the operation. Even after the switching pot 17 is switched from the reheating side to the general hot water supply side and the steam generation heating operation of the heating device is stopped, the shutoff operation delay mechanism B is attached for a while. By keeping the valve device A in the open state of the steam flow path by the action of B, scale in the steam supply path B is washed away with low-temperature hot water supplied from the heating device to the discharger 33 of the bathtub 34 during that time. be.

A specific configuration of the shutoff operation delay mechanism B includes a movable shaft 1 in which the movable shaft 14 is extended when the temperature of the contact fluid becomes high, and the movable shaft 14 is operated to extend when the temperature of the contact fluid becomes low.
4 is a temperature-sensitive straw mechanism 13 that operates to shorten (that is, a straw mechanism that uses expansion and contraction due to heat, and specifically uses bellows or wax pellets filled with a volatile agent such as ether or methyl alcohol. ) is installed in the flow path in the valve casing 3 on the downstream side of the main valve seat 4, and when the movable shaft 14 is in an extended state, the operation shaft 7 closes due to contact with the movable shaft. The movable shaft 14 and the operating shaft 7 are arranged concentrically so that sliding toward the valve closing side is prevented and the operating shaft 7 is allowed to slide toward the valve closing side when the movable shaft 14 is in the shortened state. When the switching knob 17 is on the reheating side, the movable shaft 14 is kept in an extended state due to thermal expansion due to contact with steam passing through the valve casing 3. After switching from the reheating side to the general hot water supply side, the operation shaft 7 is closed until the temperature of the fluid passing through the valve casing 3 falls below the set temperature and the movable shaft 14 is shortened due to heat contraction. It is configured to prevent sliding toward the valve side and maintain the valve device A in the open state of the steam supply path b.

Below, the water supply valve 2 for switching the heating device between the steam generation state for reheating and the low temperature hot water generation state for general hot water supply.
6 and the auxiliary gas valve 41 will be sequentially explained below.

(a) Fig. 1 shows the state when the switching state of the switching cock 17 is on the general hot water supply side, both the pilot valve body 6 and the main valve body 5 are in the closed state, and the steam supply path b is in the cutoff state. It is becoming.

Further, since the steam passes through the valve casing 3 only, the movable shaft 14 of the straw mechanism 13 serving as the temperature-sensitive shutoff operation delay mechanism B is in a shortened state.

(b) When the switching pot 10 is operated to switch from the general hot water supply state to the reheating state, the rotary cam 12 rotates 90 degrees and engages the valve opening locked member 10, as shown in FIGS. 1 and 2. Due to the locking action of the swinging member 11, the operating shaft 7 is slid to the withdrawal side (valve opening side), and the pilot valve body 6 is opened against the valve closing biasing spring 9, and subsequently The main valve body 5 is opened by the locking action of the valve-opening locking protrusion 7a, and the steam supply path b is brought into an open state.

(c) When the steam supply path b is opened, water flow to the heat exchanger 27 is started, and the automatic opening of the hydraulic response valve 37 accordingly causes the main burner 42 to open.
is automatically ignited and the steam generation heating operation of the heating device is started, and the generated steam is then supplied to the discharger 33 of the bathtub 34 via the valve device A. Thermal expansion causes the movable shaft 14 in the temperature-sensitive straw device 13 to extend as shown in FIGS. 2 and 3, and the contact with the movable shaft 14 prevents the operating shaft 7 from sliding toward the valve-closing side. be done.

(d) On the other hand, when the switching cock 17 is switched from the reheating state to the general hot water supply state, the rotary cam 12 rotates 90 degrees in the opposite direction, as shown in FIGS. The locking action of the swinging member 11 on the locked member 10 is released, but
Immediately after the switching operation of the switching knob 17, the operation shaft 7 remains prevented from sliding toward the valve closing side due to contact with the movable shaft 14 which is still in the extended state, and the valve device A is in the steam supply path open state. maintained.

However, the steam generation heating operation of the heating device is
At the time of the switching operation of the switching pot 17 to the general hot water supply side, the water supply valve 26 is opened and the auxiliary gas valve 41 is closed and has already been stopped. The steam supplied to the
The scale in the steam supply path b is effectively washed away by this hot water.

(e) When the hot water passing through the valve casing 3 becomes lower than the set temperature due to further temperature effects, the movable shaft 14 of the temperature-sensitive straw device 13 is shortened and prevented from sliding against the operating shaft 7. The action is released, and as a result, the pilot valve body 6 and the operating shaft 7 are moved as shown in FIGS. is operated to the valve closing side, and the main valve body 5 is brought into contact with the pilot valve body 6.
is closed and the steam supply path b is cut off.

The set temperature at which the movable shaft 14 of the temperature-sensitive straw device 13 serving as the shutoff delay mechanism B is shortened is lower than the temperature of the high-temperature hot water supplied from the heating device when the switching pot 17 is on the high-temperature general hot water supply side. Since the hot water temperature is also set to a high temperature, even when switching operation is made to switch the switch 17 from the reheating side to the high temperature general hot water supply side, the valve device A switches the switch 17 from the reheating side to the normal general hot water supply side. The cutoff operates in the same order as when switching to .

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

The specific structure of the fluid temperature sensing shutoff operation delay mechanism B can be modified in various ways.

The bathtub 34 is connected to the heating device for heating the water stored in the bathtub.
The high-temperature fluid supplied to the discharger 33 may be a mixed fluid of steam and high-temperature hot water or high-temperature hot water instead of steam.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIGS. 1 to 4 are cross-sectional views showing the operating state of the valve device, respectively, and FIGS. 5 and 6 are diagrams showing the overall configuration and operation switching state. . 17... Operating tool, 33... High temperature fluid discharger, 3
4... Bathtub, A... Valve device, B... Shutoff operation delay mechanism, W... Water supply channel.

Claims (1)

[Scope of utility model registration request] 1. Water supplied from the water supply channel W is heated to generate high-temperature fluid, and the high-temperature fluid is supplied to the high-temperature fluid discharger 33 disposed at the bottom of the bathtub 34 and mixed with the bathtub-stored water, thereby storing the water in the bathtub. A heating device for heating water is provided, an operation tool 17 is provided for stopping the high temperature fluid generation heating operation of the heating device, and in conjunction with the operation to stop the high temperature fluid generation heating operation by the operation tool 17, the high temperature fluid is transferred from the heating device to the high temperature fluid. Fluid ejector 33
The bath heating device is provided with a valve device A that shuts off fluid supply to the valve device A, which shuts off the fluid supply of the valve device A until the fluid supplied from the heating device to the high temperature fluid discharger 33 becomes below a set temperature. A bath heating device in which the valve device A is provided with a fluid temperature sensing type cut-off operation delay mechanism B that prevents the operation.