JPH0422207Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a bath heating device in which hot water in a bathtub is heated in a bath pot that is formed separately from the bathtub and connected via a circulation pipe.

Due to building structure constraints due to the rise in the height of residential buildings, the bath heating equipment targeted by this invention is designed to have a bath kettle located at a distance from the bathtub, and a circulation pump and automatic mixing valve installed in the circulation pipe connecting them. This is a bath heating device configured by arranging.

Previously, the above-mentioned bath heating device was
As shown in FIG. 1, a bathtub 1 installed in a bathroom and a bathtub 2 installed in an appropriate location such as a boiler room are connected to a lower communication port 10 provided at the bottom of the bathtub 1 and a bathtub. Piping 3 connecting to the intake port 20 of the pot 2 and an upper communication port 11 provided at the top of the bathtub 1
and the pipe 4 connecting the outlet 21 of the bath pot 2,
A circulation pump P is connected to the drawer side piping 3 connected to form a circulation path and connected to the lower communication port 10 of the bathtub 1.
are connected to each other, and by the operation of this circulation pump P, the water filled in the bathtub 1 is circulated to the bathtub 2 and heated up one after another. A branch pipe 30 is provided in a part of the piping 3 on the drawer side that is closer to the bath pot 2 than the circulation pump P, and this is connected to a branch pipe 30 in the middle of the piping 4 on the return side that connects to the outlet 21 of the bath pot 2. One end side of the bypass line 5 is connected in a bypass manner, and the other end side of the bypass line 5 is connected to the water inlet C of the automatic mixing valve 6, and the hot water inlet H of the automatic mixing valve 6 is connected to the It is connected to the bathtub side 4a of the return side piping 4, and the mixed water outlet M of the automatic mixing valve 6 is connected to the bathtub side 4b of the delivery side piping 4. As a result, hot water drawn from the bathtub 1 by the circulation pump P is sent into the bathtub 2 through the piping 3 on the drawer side, heated, and then circulated back to the bathtub 1 via the piping 4 on the return side. In addition to the flow that returns through the bath pot 2, there is also a flow that returns to the bathtub 1 from the bypass pipe 5 through the automatic mixing valve 6 without passing through the bath pot 2, and the amount of hot water in these two flows is reduced. , automatic mixing valve 6
However, the temperature of the water in the bathtub 1 is high, and therefore the water is supplied from the bypass pipe 5 to the automatic mixing valve 6. As the temperature of the hot water increases, the amount of hot water flowing from the bath pot 2 through the bath pot side 4a of the return pipe 4 to the hot water inlet H of the automatic mixing valve 6 decreases, and the amount of hot water flows from the bypass pipe 5 to the hot water inlet H of the automatic mixing valve 6. The amount of hot water flowing into the water inlet C of the automatic mixing valve 6 increases, and the temperature of the hot water in the bathtub 1 is maintained at a desired temperature set by the thermoelement of the automatic mixing valve 6.

By the way, the bath heating device A configured in this way
In this case, the hot water returned to the bathtub 1 is taken out from the mixed water outlet M of the automatic mixing valve 6, and the temperature does not exceed the set temperature of the automatic mixing valve 6, so the hot water in the bathtub 1 is Even if the temperature of the bathtub is low, only water at the set temperature can be used.
As a result, the hot water in the bathtub 1 rises up as shown in Figure 5, and the hot water in the bathtub 1
There is a problem with the hot water rising slowly inside.

In order to improve the rise in temperature of hot water when heating up the hot water in the bathtub 1, as disclosed in Japanese Patent Application Laid-Open No. 56-66644, a drawer is provided that communicates the lower part of the bathtub with the intake port of the heat source device. Connect a circulation pump to the side piping, connect the upper communication port of the bathtub and the outlet of the heat source device with the return side piping, and use the circulation pump to draw out the water in the bathtub and send it to the heat source device, where it is heated. In a forced circulation bath unit, the piping on the drawer side includes a temperature sensor, a branch pipe, and a temperature sensor between the circulation pump and the heat source device, and a A control valve that opens and closes, and a water valve that opens and closes a fuel control valve that controls the supply of fuel to the heat source equipment depending on the presence or absence of water flow are installed in parallel in that order, and the branch pipe and return pipe are connected with a bypass pipe. In this configuration, a constant flow valve is installed in the bypass pipe, and when the circulation pump is activated, water in the bathtub is drawn out from the lower communication port of the bathtub to the drawer-side piping at the temperature set in the temperature sensor. When the temperature is lower than the temperature, the control valve opens to create a water flow in the water valve, which controls the supply of fuel to the heat source machine.The fuel control valve opens and puts the heat source machine into operation, thereby allowing the drawn hot water to When the operating heat source equipment heats the water and returns it to the bathtub, and the water temperature detected by the temperature sensor reaches the set temperature, the control valve closes and no water flows to the water valve. The fuel control valve of the heat source device closes to stop the operation of the heat source device, and at the same time, the hot water in the bathtub drawn out to the piping on the drawer side flows from the bypass pipe to the piping on the return side and returns to the bathtub, and at this time, There is a means to restrict the flow rate using a constant flow valve provided in the bypass pipe.

This means includes a temperature sensor on the piping on the drawer side,
In addition to providing a control valve whose opening and closing are controlled by this, and a water valve, it is necessary to provide a constant flow valve in the bypass pipe, which requires many control mechanisms, making the mechanism complicated and maintenance difficult. In addition to controlling the fuel control valve of the heat source machine with the water valve without using a mixing valve,
Since the operation of the direct heat source device is controlled on and off, when the temperature of the hot water drawn from the bathtub falls below the set temperature set on the temperature sensor, the heat source device is activated and at the same time the large amount of hot water that passes through the heat source device is activated. When hot water flows into the bathtub and reaches the set temperature, the heat source device turns off and a small amount of hot water returns to the bathtub via the bypass pipe, so the upper and lower limits of the set temperature cannot be avoided. As the width of the bathtub increases, it becomes difficult to maintain the temperature inside the bathtub at a constant temperature, and there is a problem in that it is particularly difficult to control the temperature of the water inside the bathtub when it is close to the set temperature.

The present invention was made in order to solve such problems that have arisen with conventional means.
To accurately maintain the temperature of water in a bathtub around a desired constant temperature by using an automatic mixing valve while quickly raising the temperature of water when boiling water in the bathtub. The purpose is to provide a bath heating device.

In the present invention, as a means to achieve this objective, the lower communication port provided in the bathtub and the inlet of the bath kettle are communicated through piping on the drawer side, and the upper communication port of the bathtub and the inlet of the bath kettle are communicated with each other. and the outlet,
The return side piping communicates with the piping, and a circulation pump that draws and discharges hot water from the bathtub is connected in the middle of the drawer side piping, and an automatic mixing system is installed between the discharge side of the circulation pump and the bath pot. A valve is provided so that its mixed water outlet communicates with the discharge side of the circulation pump and its hot water inlet communicates with the inlet side of the bathtub, and the water inlet of the automatic mixing valve is connected to the outlet side of the circulation pump through a bypass pipe. The present invention proposes a bath heating device which is connected to the middle of the return side piping.

Next, an example of implementation will be described in detail with reference to the drawings. Note that the same reference numerals in the drawings as in the conventional means are used for constituent members having the same effect.

Fig. 2 is a partially cutaway explanatory diagram of the entire bath-burning device in which the present invention can be implemented; in the figure, 1 is a bathtub that can be installed in a bathroom, and 2 is a bathtub that can be installed in an appropriate location in a building such as a boiler room. 3 is a pipe on the drawer side that connects the lower communication port 10 of the bathtub 1 and the intake port 20 of the bathtub 2; 4 is a pipe on the return side that connects the outlet 21 of the bathtub 2 and the upper communication port 11 of the bathtub 1; Piping, P is a circulation pump connected to the piping 3 on the drawer side, 6 is the discharge side of the circulation pump P and the inlet 20 of the bath pot 2
5 is a bypass connecting the water inlet C of the automatic mixing valve 6 to the middle of the above-mentioned return side piping 4. Shows the conduit.

The bathtub 1 is conventionally known, and a lower communication port 10 and an upper communication port 11 provided therein are each equipped with connecting pipes for connecting pipes, and these are connected to a pipe 3 on the drawer side and a pipe on the return side. Each one end side of the piping 4 is connected.

The bathtub 2 is a conventionally known boiler consisting of a burner device 2a and a serpentine heat exchanger 2b, and one end of the heat exchanger b is formed as an inlet 20.
The other end of the heat exchanger 2b is formed at the outlet 21. The other ends of the aforementioned piping 3 on the extraction side and piping 4 on the return side are connected to the inlet 20 and the outlet 21 via connecting fittings.

The circulation pump P is conventionally known, and is connected to the middle of the piping 3 on the drawer side so that the suction side communicates with the bathtub 1 and the discharge side communicates with the bathtub 2, and a motor drives it. By energizing the bathtub 1, hot water filled in the bathtub 1 is drawn out from the lower communication port 10 and discharged to the bathtub 2 side.

As shown in FIG. 3, the automatic mixing valve 6 is equipped with a connecting cylinder part 61 forming a hot water inlet H on one side of the body, and a water inlet C on the opposite side.
A cylindrical valve box 60 is equipped with a connecting cylinder part 62 forming a mixed water outlet M, and a connecting cylinder part 63 forming a mixed water outlet M at the bottom thereof. A cylindrical mixing valve 65 with valves 65a and 65b formed at the upper and lower ends of the cylindrical wall, respectively, is arranged in the mixing chamber 64 to communicate with the hot water inlet H side. It is slidably inserted vertically into a through hole provided in a partition wall 66 that separates the water inlet C side from the water inlet C side, and opens and closes communication between the hot water inlet H side and the mixing chamber 64 by facing the valve 65a at the lower end of the mixing valve 65. A valve seat 67a is provided on the bottom side of the mixing chamber 64, and a valve seat 6 opens and closes communication between the water inlet C side and the mixing chamber 64, facing the valve 65b at the upper end of the mixing valve 65.
7b is installed on the ceiling of the mixing chamber 64, and the body 70 of the thermoelement TH arranged in the mixing chamber 64 is connected to the mixing valve 65, so that the rod 71 is extruded by the temperature rise of the thermoelement TH.
is brought into abutment with the abutment member 73 held by an adjustment screw 72 screwed into the upper end of the valve box 60, and the mixing valve 65 is urged upward by the spring 68, and the abutment A handle 75 that causes a release spring 74 to act on the member 73 and connects it to the adjustment screw 72
By adjusting the operating position of thermoelement TH and setting the desired temperature, mixing chamber 6
The mixing valve 65 is controlled by the operation of the thermoelement TH so that the temperature of the mixed water in the mixing chamber 64 reaches the set temperature, and the temperature of the mixed water taken out from the mixing chamber 64 through the mixed water outlet M also reaches the set temperature. This is a conventionally known method for holding.

However, this automatic mixing valve 6 is used with its connection to the piping reversed from the normal case. That is, in normal cases, the hot water inlet H and the water inlet C serve as inlets for introducing hot water and water, and the mixed water outlet M serves as an outlet for discharging the mixed water. However, in the present means, the mixed water outlet M is communicated with the discharge side of the circulation pump P, the hot water inlet H is communicated with the inlet 20 of the bath pot 2, and the water inlet C is connected to the bypass pipe 5. By communicating, the mixed water outlet M
It is used so that the hot water inlet H and the water inlet C serve as the inlet and the outlet. As a result, the mixed water is sent from the outlet M into the valve box 60 and into the mixing chamber 64.
A mixing valve 65 is operated by a thermoelement TH that operates according to the temperature of the hot water in the mixing chamber 64 when the hot water flowing into the mixing chamber 64 is distributed to the hot water inlet H side and the water inlet C side and flows out. By the control operation, the amount of hot water flowing to the hot water inlet H side and the amount of hot water flowing to the water inlet C side are changed and adjusted.

Thus, the embodiment device configured as described above operates as follows.

When the hot water in the bathtub 1 is cold water supplied from the tap and has a low temperature, the circulation pump P is activated to mix the water in the mixing chamber 64 of the automatic mixing valve 6.
The temperature of the hot water sent inside is lower than the set temperature.
!? By being so low, the mixing valve 65 is held in a position where the flow path communicating with the hot water inlet H is wide open and the flow path communicating with the water inlet C is narrowly closed by the control operation of the thermoelement TH.

Therefore, most of the hot water drawn out from the bathtub 1 by the circulation pump P passes through the valve box 60 of the automatic mixing valve 6 and flows into the bathtub 2, where it is heated and passes through the return piping into the bathtub 1. The circulation returns to the bathtub 1 through the bypass pipe 5 without passing through the bathtub 2, and the circulation returns to the bathtub 1 almost never. At this time, the hot water that is boiled in the bathtub 2 and returned to the bathtub 1 via the return pipe 4 is not subject to any restrictions, regardless of the set temperature or even if it is higher than the set temperature. He was returned to bathtub 1 without receiving any water.

This circulation continues until the temperature of the hot water drawn from the bottom of the bathtub 1 by the circulation pump P and sent into the mixing chamber 64 of the automatic mixing valve 6 reaches around the set temperature. When the temperature of the hot water flowing into the mixing chamber 64 approaches the set temperature, the mixing valve 65 moves downward in FIG. Since the flow path communicating with the water inlet C is wide open, the amount of hot water that passes through the bathtub 2 and returns to the bathtub 1 is small, and the amount of hot water that returns to the bathtub 1 via the bypass pipe 5 is increased. Next, when the temperature of the hot water in the mixing chamber 64 reaches the set temperature, most of the water returns to the bathtub 1 via the bypass pipe 5.

Therefore, the temperature t of the hot water returned into the bathtub 1 and the temperature T of the hot water inside the bathtub 1 change as shown in FIG. 6, and the rising speed of the hot water becomes extremely fast.

As explained above, the bath heating device according to the present invention communicates the lower communication port 10 provided in the bathtub 1 with the intake port 20 of the bath pot 2 through the piping 3 on the drawer side, and also connects the lower communication port 10 provided in the bathtub 1 with the intake port 20 of the bathtub 1 through the piping 3 on the drawer side. The outlet 21 of the bathtub 2 is communicated with the return side piping 4, and a circulation pump P that draws hot water from the bathtub 1 and discharges it is connected to the middle of the drawer side piping 3.
Between the discharge side of the circulation pump P and the bath pot 2,
Automatic mixing valve 6, its mixing water outlet M
is connected to the discharge side of the circulation pump P and the hot water inlet H is connected to the inlet 20 side of the bath pot 2, and the water inlet C of the automatic mixing valve 6 is connected to the
Since the bathtub 1 is configured to be connected to the middle of the return side piping 4 via the bypass piping 5,
The hot water is drawn out from inside by the circulation pump P and circulated through the bathtub 2 and returned to the bathtub 1. When the temperature is low, most of the hot water is circulated through the bathtub 2 when the temperature is low. When the heated hot water returns to the bathtub 1, regardless of the set temperature set by the automatic mixing valve 6, even if the water temperature is much higher than the set temperature, the hot water returns to the bathtub 1 as it is. It significantly speeds up the rise in temperature of water when boiling water.

Furthermore, as the temperature of the hot water in the bathtub 1 gradually increases, the temperature of the hot water flowing through the bypass pipe 5 to the water inlet C of the automatic mixing valve 6 increases, causing the automatic mixing valve 6 to increase. As a result, the amount of hot water that circulates back to the bathtub 1 via the bypass pipe 5 without passing through the bath pot 2 gradually increases, and when the water temperature approaches the set temperature,
Most of the water circulates through the bypass pipe 5 and returns to the bathtub 1. At this time, if the temperature of the water in the bathtub 1 drops, the automatic mixing valve 6 is activated to control the water inlet C.
is narrowed, the hot water inlet H is widened, and the proportion of hot water that circulates without passing through the bath pot 2 is increased. From this, control for maintaining the temperature of the water in the bathtub 1 at a desired temperature can be performed appropriately by making the change in the temperature of the water gradual.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the conventional means, Fig. 2 is a partially cutaway explanatory diagram of an embodiment of the device of the present invention, Fig. 3 is a front view of the automatic mixing valve of the same device, and Fig. 4 is a vertical cross-sectional view of the same device. 5 is an explanatory diagram of the operation of the conventional means, and FIG. 6 is an explanatory diagram of the operation of the means of the present invention. Explanation of drawing symbols, A...bath heating device, 1...bathtub, 10...lower communication port, 11...upper communication port,
2... Bath pot, 2a... Burner device, 2b...
Heat exchanger, 20... Inlet port, 21... Outlet port, 3
...Piping, 30...Branch pipe, 4...Piping, 4a...
...bath pot side, 4b...bathtub side, 5...bypass pipe, 6...automatic mixing valve, 60...valve box, 61, 62, 63...connecting tube section, 64...mixing chamber, 65... ...mixing valve, 65a, 65b...valve,
66... Bulkhead, 67a, 67b... Valve seat, 68...
... Spring, 70 ... Body, 71 ... Rod, 72
... Adjustment screw, 73 ... Collision member, 74 ... Relief spring, 75 ... Handle, P ... Circulation pump, M
...Mixed water outlet, H...Hot water inlet, C...Water inlet,
TH...Thermo element.

Claims (1)

[Scope of utility model registration request] The lower communication port 10 provided in the bathtub 1 and the intake port 20 of the bath boiler 2 are communicated with each other through the piping 3 on the drawer side, and the upper communication port 11 of the bathtub 1 and the outlet 2 of the bath boiler 2 are connected.
1 are connected to each other by a return side piping 4, and a circulation pump P that draws hot water from inside the bathtub 1 and discharges it is connected to the middle of the drawer side piping 3, and the discharge side of the circulation pump P and the An automatic mixing valve 6 is connected to the bath pot 2 in such a way that its mixed water outlet M communicates with the discharge side of the circulation pump P and the hot water inlet H communicates with the inlet 20 side of the bath pot 2. and the water inlet C of the automatic mixing valve 6,
A bath heating device connected to the middle of the return side pipe 4 via a bypass pipe line 5.