JPH05625B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an automatic bathtub equipped with a hot water supply heat exchanger and a bathtub heat exchanger.

(Prior art) As shown in Figure 1, in a conventional automatic bathtub, the hot water supply pipe from the hot water heat exchanger 2 is branched and one end is connected to a faucet, which is an end device in the kitchen, washroom, etc. A branch pipe 3 is provided, and a bathtub circulation pipe 4 is provided on the other side.
A hot water supply pipe 5 for the bathtub is connected to a water supply pipe 5, and a water flow sensor 8 detects the amount of water discharged from the bathtub 6 and inputs a signal to the hot water supply controller 7. An automatic hot water supply control section 21 is provided with a shutoff valve 9 for opening and closing, and a shutoff valve 9 of the hot water supply controller 7 is installed in the circulation pipe 4 between the bathtub 6 and the bathtub heat exchanger 10.
A circulation pump 12 that inputs a closing signal to the boiling controller 11 and is driven by the output signal of the controller 11.
Then, the flow in the circulation pipe 4 at the outlet of the bathtub heat exchanger 10 is detected and inputted to the boiling controller 11.
A water flow sensor 14 that opens the bath gas valve 13 to cause combustion based on the output signal of the bathtub heat exchanger 10.
A temperature sensor 15 detects the set temperature of the circulating water in the circulation pipe 4 at the inlet, inputs it to the boiling controller 11, and uses an output signal from the controller 11 to close the bath gas valve 13 and stop the circulation pump 12. A temperature sensor 16 is provided in the water supply pipe between the hot water heat exchanger 2, the hot water supply pipe 5 for the bathtub, and the branch point of the branch pipe 3. The sensor 16 is connected to the proportional control valve 17 to switch the set temperature to the ambient temperature, input the signal to the hot water temperature controller 18, and open/close the hot water gas proportional control valve 17 based on the signal from the controller 18. An automatic hot water supply temperature control section 19 is formed.

(Problem to be Solved by the Invention) On the other hand, the function of the automatic hot water supply temperature control section 19 in the conventional example described above is to control the difference between the outlet temperature of the hot water supply heat exchanger 2 and the set hot water temperature as shown in FIG. Since this is a so-called feedback control system in which feedback is sent back to the gas proportional control valve 17 to adjust the opening degree of the valve 17, depending on the usage conditions, the temperature at the start of the tap may change or As shown in Figure 4, when the amount of hot water discharged changes during use, the hot water temperature tends to fluctuate, making it difficult to use. In addition, since the water flow sensor 8 is used only on the water meter side, it has a drawback that it has little utility and is expensive in terms of cost.

The present invention has been made in view of the above-mentioned drawbacks, and a water flow sensor 25 and a temperature sensor 26 are provided in the water inlet pipe 24 of the heat exchanger 2 for hot water supply, and the water flow rate and water temperature are detected by both sensors to perform gas proportional control. The opening degree of the valve 17 is set, and the opening degree of the valve 17 is finely adjusted by the temperature sensor 16 on the hot water outlet side, and the water quantity sensor 25 is also used to measure the amount of water for filling the water, and the water quantity sensor 8 of the hot water supply pipe 5 is A water flow sensor 20 is installed in the removed branch pipe 3, and the sensor 20 closes the stop valve 9 of the hot water supply pipe 5 for a bathtub when a terminal equipment such as a kitchen is used, thereby providing an easy-to-use automatic bath pot at a low cost. The purpose is not to provide such information.

(Means for Solving the Problems) The structure of the present invention for achieving the above object will be explained using FIGS. 5 to 8 corresponding to the embodiments. The vessel 10 and the bathtub 6 are connected by a circulation pipe 4, and a boiling controller 11 is connected to the circulation pipe 4.
A water flow sensor 14 connected to a bath gas valve 13 via a water flow sensor 14, a circulation pump 12 connected to a boiling controller 11, an automatic boiling control part 27 of a bath kettle heat exchanger 10 equipped with a temperature sensor 15, and a hot water supply heat The hot water supply pipe of the exchanger 2 is branched, and on one side there is a water flow sensor 20 connected to the hot water supply controller 7 in the middle of the branch pipe 3 connected to the end equipment, and on the other side there is a hot water supply pipe 5 for the bathtub connected to the circulation pipe 4 of the bathtub 6. An automatic hot water supply control section 21 is provided with a shutoff valve 9 that connects to the hot water supply controller 7 and detects the water flow in the branch pipe 3 and closes the pipe 5 based on a signal from the water flow sensor 20, and a hot water heat exchanger 2. A water flow sensor 25 and hot water gas are connected to the water inlet pipe 24 of the hot water supply pipe 24 to control the hot water supply gas proportional control valve 17 via the hot water supply temperature controller 18, and to open and close the shutoff valve 9 of the hot water supply pipe 5 for the bathtub via the hot water supply controller 7. An automatic water supply temperature system in which a temperature sensor 26 for controlling the proportional control valve 17 is provided, and a temperature sensor 16 is connected to the hot water supply pipe of the hot water heat exchanger 2 to finely adjust the hot water gas proportional control valve 17. It is characterized by comprising a control part 19.

(Function) When hot water is supplied to the bathtub using the above-described means, the present invention indirectly operates the overall control circuit 28, opens the water supply valve (not shown) in response to the signal, and connects the water inlet pipe 24. Let water flow in. and,
The hot water temperature controller 18 inputs the incoming water amount from the water flow sensor 25 and the incoming water temperature from the temperature sensor 26 provided in the water inlet pipe 24, sets the opening degree of the gas proportional control valve 17, opens the valve 17, causes combustion, and the water flow sensor 25
The signal is transmitted to the shutoff valve 9 via the hot water supply controller 7, and the valve 9 opens. The hot water coming out of the hot water supply heat exchanger 2 is detected by the sensor 16, and the signal is input to the hot water temperature controller 18, which finely adjusts the opening of the gas proportional control valve 17 to set the temperature and flow into the bathtub hot water pipe 5. . The water then flows through the check valve 22 to prevent backflow and the separator 23 to prevent mixing of tap water and bath water, and flows into the upper circulation pipe 4 in the automatic bath pot 1, and when the amount of water discharged reaches the set amount, hot water is automatically supplied. The water flow sensor 25 of the temperature control section 19 detects this, and the shutoff valve 9 is closed via the hot water supply controller 7. At the same time, a valve closing signal from the hot water supply controller 7 is input to the boiling controller 11, and the circulation pump 12 is activated by that signal. It operates and the hot water in the bathtub 6 is circulated. Further, the water flow sensor 14 detects the flow and inputs the signal to the boiling controller 11, and the bath gas valve 13 is opened in response to the signal from the controller 11 to cause combustion. The temperature sensor 15 detects the temperature of the circulation pipe 4 on the inlet side of the bath heat exchanger 10, and when the temperature exceeds the set temperature, the signal from the sensor 15 is input to the boiling controller 11, and the signal is used to generate the bath gas. valve 13
and the circulation pump 12 is stopped. When the temperature inside the bathtub drops, the user operates a remote control or the like to input a signal to the boiling controller 11 through the overall control circuit 28, and activates the circulation pump 12 to operate from the initial state and ignite. .

Furthermore, when the end equipment of the branch pipe 3 is used to supply hot water to the bathtub 6 via the hot water supply pipe 5 for hot water supply at the set temperature from the heat exchanger 2 for hot water supply, the flow of water causes a water flow sensor in the branch pipe 3. 20 detects the flow, and the signal is input to the hot water supply controller 7, which closes the shutoff valve 9 and the water flows only to the branch pipe.

That is, a water flow sensor and a temperature sensor are installed in the inlet pipe of a heat exchanger for hot water supply to set the opening degree of the gas proportional control valve to adjust the amount of gas ejected, and a temperature sensor is installed in the hot water supply pipe of the exchanger to set the opening degree of the gas proportional control valve. Since the opening degree of the gas proportional control valve is finely adjusted, Figures 7 and 8
As shown in the figure, hot water at the set temperature is obtained without fluctuations in the hot water temperature at the start of hot water tap and during use due to changes in the hot water amount. Note that the hot water supply method for the bathtub of the present invention has a configuration in which the hot water flows into a circulation pipe between the bathtub heat exchanger and the bathtub, but the hot water supply method for the bathtub is not limited to this, and a drop-in method in which the hot water supply pipe for the bathtub is piped above the bathtub is also possible. It's good as well.

(Example) An example of the present invention will be described below based on FIGS. 5 to 8.

Reference numeral 1 denotes an automatic bathtub, which is equipped with a hot water supply heat exchanger 2, a bathtub heat exchanger 10, and the like.

The heat exchanger 2 for hot water supply has one hot water supply pipe branched in the middle, and one side is provided with a branch pipe 3 in which a water flow sensor 20 is disposed in the middle, and the end thereof is connected to the end of the kitchen, washroom, etc. A device such as a faucet is connected to the other end, and a hot water supply pipe 5 for a bathtub is installed, and a signal from a water flow sensor 20 of a branch pipe 3 is inputted to a hot water supply controller 7 to control a shutoff valve 9. An automatic hot water supply control section 21 for opening and closing is formed. A check valve 22 and a separator 2 are downstream of the stop valve 9.
3 is provided and connected to the upper circulation pipe 4 of the bathtub heat exchanger 10.

In addition, a water flow sensor 25 and a temperature sensor 26 are provided in the water inlet pipe 24 upstream of the hot water supply heat exchanger 2.
As shown in the figure, each signal is sent to the hot water temperature controller 18.
to calculate the incoming water heat amount and the set heat amount, and set the opening degree of the gas proportional control valve 17. A temperature sensor 16 is provided between the sensor 16 and the hot water supply gas proportional control valve 17, and the sensor 16 detects the set temperature and inputs the signal to the hot water temperature controller 18. An automatic hot water supply temperature control section 19 is formed which finely adjusts the hot water supply gas proportional control valve 17 based on a signal.

Furthermore, the bathtub heat exchanger 10 is connected to the bathtub 6 by two upper and lower circulation pipes 4, and a return pipe of the circulation pipe 4 is connected to a return pipe when the amount of hot water supplied in the bathtub 6 reaches a set amount. , the signal from the water flow sensor 25 is sent to the water heater controller 7.
a circulation pump 12 which inputs the signal to the controller 7 and closes the shutoff valve 9 and inputs the signal from the controller 7 to the boiling controller 11 to circulate the hot water in the bathtub 6.
Then, water flow is detected in the outgoing pipe of the circulation pipe 4 on the outlet side of the bathtub heat exchanger 10, and the signal is sent to the boiling controller 1.
1, and a water flow sensor 14 that opens and ignites the bath gas valve 13 according to the signal from the controller 11;
The circulation pipe 4 on the inlet side of the heat exchanger 10 detects the set water temperature, inputs the signal to the boiling controller 11, closes the gas valve 13 for the bath according to the signal from the controller 11, and has a circulation pump 12. Temperature sensor 1 to stop
An automatic boiling control section 27 consisting of 5 is formed.

Note that the hot water supply controller 7, the hot water temperature controller 18, the boiling controller 11, the bath gas valve 13, and the hot water supply gas proportional control valve 17 are electrically operated so that they function automatically by the overall control circuit 28. It is connected.

(Effects of the Invention) Therefore, the present invention provides a water flow sensor and a temperature sensor in the water inlet pipe upstream of the heat exchanger for hot water supply, inputs each signal to the hot water temperature controller, and operates the gas proportional control valve along with the signal input from the temperature sensor. The valve is controlled to open and close the shutoff valve provided in the hot water supply pipe for the bathtub via the hot water supply controller in response to the signal from the water flow sensor, and to open and close the shutoff valve provided in the hot water supply pipe for the bathtub via the water supply controller in response to the signal from the water flow sensor provided in the branch pipe. Since we have a configuration that allows
Fluctuations in the hot water temperature at the start of hot water dispensing or automatic temperature fluctuations due to changes in the amount of hot water during use are eliminated, and hot water at the set temperature can be stably obtained, and hot water can be used in the kitchen etc. while hot water is being supplied to the bathtub. The hot water supply to the bathtub is temporarily stopped and a sufficient amount of hot water is ensured, which improves ease of use, and the water flow sensor can also be used as a gas proportional control valve and a shutoff valve, which can be provided at low cost.

[Brief explanation of the drawing]

Fig. 1 is a system diagram showing a conventional embodiment, Fig. 2 is a flowchart showing a conventional embodiment, Fig. 3,
Fig. 4 is a temperature distribution diagram showing a conventional embodiment, Fig. 5 is a system diagram showing an embodiment of the present invention, Fig. 6 is a flow chart showing an embodiment of the present invention, Figs.
The figure is a temperature distribution diagram showing an example of the present invention. Explanation of symbols 1... Automatic bath pot body, 2... Heat exchanger for hot water supply, 3... Branch pipe, 4... Circulation pipe, 5... Hot water supply pipe for bathtub, 6... Bathtub, 7... Hot water supply controller, 8... Water amount sensor, 9... Shutoff valve, 10... Heat exchanger for bathtub, 1
1... Boiling controller, 12... Circulation pump, 13... Bath gas valve, 14... Water flow sensor, 15... Temperature sensor, 16... Temperature sensor, 17... Gas proportional control valve for hot water supply, 18... Hot water supply temperature controller, 19...Automatic hot water supply temperature control section, 20...Water flow sensor, 21...Automatic hot water supply control section, 22...Check valve, 23...Separator, 24...
Water inlet pipe, 25...Water amount sensor, 26...Temperature sensor, 27...Automatic boiling control section, 28...Overall control circuit, 29...Burner.

Claims (1)

[Claims] 1 The circulation pipe 4 connects the bathtub heat exchanger 10 and the bathtub 6
A heat exchanger 10 for a bathtub, which is equipped with a water flow sensor 14 connected to the circulation pipe 4 via a boiling controller 11 to a bath gas valve 13, a circulation pump 12 connected to the boiling controller 11, and a temperature sensor 15. automatic boiling control part 27, and a branch pipe 3 which branches the hot water supply pipe of the hot water heat exchanger 2 and connects it to an end device on one side.
Water flow sensor 20 connected to hot water controller 7 in the middle of
On the other hand, there is a branch pipe 3 connected to a hot water supply controller 7 in the middle of a bathtub hot water supply pipe 5 connected to the circulation pipe 4 of the bathtub 6.
An automatic hot water supply control section 21 is provided with a shutoff valve 9 that detects the water flow and closes the pipe 5 according to a signal from a water flow sensor 20, and a water supply temperature controller 18 is connected to the water inlet pipe 24 of the heat exchanger 2 for hot water supply. A water flow sensor 25 that controls the hot water supply gas proportional control valve 17 and opens and closes the stop valve 9 of the hot water supply pipe 5 for the bathtub via the hot water supply controller 7, and a temperature sensor 26 that controls the hot water supply gas proportional control valve 17 are provided. and an automatic hot water temperature control section 19 which is connected to a hot water temperature controller 18 in the hot water pipe of the hot water heat exchanger 2 and is provided with a temperature sensor 16 for finely adjusting the hot water gas proportional control valve 17. Bath pot.