JPS6060450A - Automatic bath heater - Google Patents

Abstract

PURPOSE:To eliminate the change of delivered hot water temperature at the start of delivery and due to the change of flow rate of delivered hot water in use by a method wherein the amount of gas jetted is adjusted by setting the opening of a gas proportioning control valve based upon the water flow rate and temperature respectively measured by a water flow sensor and a temperature, sensor, both of which are arranged in the water inlet pipe of a heat exchanger for hot water supply and further finely adjusted by controlling the opening of the gas proportioning control valve based upon the temperature measured by a temperature sensor arranged in the hot water supplying pipe of said heat exchanger. CONSTITUTION:A service hot water temperature controller 18 sets the opening of a gas proportioning control valve 17 by inputting the water flow rate and the temperature of incoming water respectively measured by a water flow sensor 25 and a temperature sensor 26, both of which are arranged in a water inlet pipe 24 and opens said valve 17 in order to burn gas. At the same time, the signal of the water flow sensor 25 is transmitted through a service hot water controller 7 to a shut-off valve 19 in order to open said valve 9. The temperature of the hot water leaving a heat exchanger 2 for hot water supply is detected by a temperature sensor 16, the signal of which is inputted to a service hot water controller 18 so as to finely adjust the opening of the gas proportioning control valve in order to bring said temperature to a set temperature and to flow the hot water to a hot water supply pipe 5 for bathtub. Furthermore, when the temperature of the water at the outlet of a heat exchanger 10 for a bath detected by a temperature sensor 15 exceeds a set temperature, the signal of said sensor 15 is inputted to a water heating controller 11.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic bathtub equipped with a heat exchanger for hot water supply and a heat exchanger for bathtubs.

In a conventional automatic bathtub, as shown in Figure 1, a hot water supply pipe from a heat exchanger 2 for hot water supply is branched, and one side is provided with a branch pipe 3 connected to a faucet, which is an end device in a kitchen, washroom, etc. On the other hand, a hot water supply pipe 5 for the bathtub connected to the circulation pipe 4 of the bathtub is provided, and in the middle of the hot water supply pipe 5 there is a water flow sensor 8 that detects the water volume of the bathtub 6 and inputs a signal to the hot water supply controller 7 . A shutoff valve 9 is provided to control the hot water in the hot water supply pipe 5 for the bathtub based on a signal, and the valve close signal of the hot water supply controller 7 is sent to the circulation pipe 4 between the bathtub 6 and the heat exchanger 10 for the bathtub. 11 and is driven by the output signal of the controller 11, and a bath gas valve 13 which detects the flow of the circulation pipe 4 and inputs it to the boiling controller 11 and is driven by the output signal of the controller 11. A water flow sensor 14 opens and burns the circulating water, detects the set temperature of the circulating water, inputs it to the boiling controller 11, closes the bath gas valve 13 according to the output signal of the controller 11, and controls the circulation pump 1.
Furthermore, a temperature sensor 16 is provided in the hot water supply pipe between the hot water supply heat exchanger 2, the hot water supply pipe 5 for the bathtub, and the branch point of the branch pipe 3, and a temperature sensor 15 is provided for stopping the hot water supply The sensor 16 is connected to the gas proportional control valve 17 and switches the set temperature to the field, and sends the signal to the hot water temperature controller 1.
8, and an automatic hot water supply temperature control section 19 is formed which opens and closes the hot water supply gas proportional control valve 17 according to the signal from the controller 18.

The function of the automatic hot water supply temperature control section 19 in the above configuration is as follows:
As shown in Fig. 2, the difference between the outlet temperature of the hot water supply heat exchanger 2 and the set hot water output temperature is fed back to the gas proportional control valve 17 to adjust the opening degree of the valve 17, which is the so-called feedback control system. Depending on the condition, the hot water temperature may fluctuate at the start of hot water dispensing as shown in Figure 3, or the hot water temperature may fluctuate when the amount of hot water changes during use as shown in Figure 4, making it difficult to use. It was hot. In addition, since the water amount sensor 8 is used only to measure water filling, it has a drawback that it has little utility value and is expensive in terms of cost.

The present invention has been made in view of the above-mentioned drawbacks, and includes a water flow sensor and a temperature sensor provided in the water inlet pipe of a heat exchanger for hot water supply. In addition, the temperature sensor on the hot water outlet side is used to finely adjust the opening of the valve, and the water flow sensor is also used to measure the amount of water used for filling the water.The water flow sensor in the hot water supply pipe is removed and a water flow sensor is installed in the branch pipe. The purpose is to provide an easy-to-use automatic bathtub at a low cost by using a sensor to close the stop valve of a hot water supply pipe for a bathtub when a terminal device such as a kitchen is used.

Embodiments of the present invention will be described below with reference to FIGS. 5 to 8.

1 has a hot water supply heat exchanger 2 and a bathtub heat exchanger 1 inside.
This is an automatic bath pot equipped with a water flow sensor 20, etc., and a 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 with a water flow sensor 20 disposed in the middle. Terminal equipment such as a faucet in a kitchen, a washroom, etc. is connected to the terminal end.

In addition, a hot water supply pipe 5 for a bathtub is disposed on the other side, and a shutoff valve 9 etc. is provided in the middle of the pipe, and a shutoff valve 9 is provided in response to a signal from a water flow sensor 20.
An automatic hot water supply control section 21 is formed which is provided with a hot water supply controller 7 that opens and closes the water supply, and a check valve 22 and a separator 23 are provided downstream of the shutoff valve 9 to connect the upper circulation pipe 4 in the automatic bath pot 1. It is connected.

In addition, a water flow sensor 25 and a temperature sensor 26 are installed in the water inlet pipe 24 downstream of the hot water heat exchanger 2, and as shown in FIG. 6, the respective signals are input to the hot water temperature controller 18 to calculate the incoming water heat amount and the set heat amount. At least the opening degree of the gas proportional control valve 17 is set, and the hot water supply heat exchanger 2 and the bathtub hot water supply pipe 5,
A temperature sensor 16 is provided in the hot water supply pipe between the branch point of the branch pipe 3, and the sensor 16 detects the set temperature and transmits the signal to the hot water supply gas proportional control valve 17. The signal is input to the temperature controller 18, and the hot water supply gas proportional control valve 17 is finely adjusted based on the signal from the controller 18. The bathtub heat exchanger 10 is connected to the bathtub 6 by two upper and lower circulation pipes 4. The signal from the sensor 25 is input to the hot water temperature controller 18 and the hot water supply controller 7, and the signal closes the shutoff valve 9, and the signal from the controller 7 is input to the boiling controller 11 to control the hot water in the bathtub 6. The circulation pump 12 that circulates the water, and the water flow on the bathtub heat exchanger 10 side of the circulation pump 12, detect the water flow, input the signal to the boiling controller 11, and operate the bath gas valve 13 based on the signal from the controller 11. A water flow sensor 14 that opens and ignites is provided.

Further, the upper circulation pipe 4 detects the set water temperature and inputs the signal to the boiling controller 11, which closes the bath gas valve 13 and stops the circulation pump 12 based on the signal from the controller 11. An automatic boiling control section 27 consisting of a temperature sensor 15 is formed.

In addition, 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 gas proportional control valve 17
are electrically connected so that they function automatically by the overall control circuit 28.

That is, when supplying hot water to the bathtub, the overall control circuit 28
The water supply valve (not shown) is operated indirectly and the signal is used to control the water supply valve (not shown).
is opened to allow water to flow into the water inlet pipe 24. Then, the hot water temperature controller 18 inputs the incoming water amount from the water flow sensor 25 provided in the water inlet pipe 24 and the incoming water temperature from the temperature sensor 26, sets the opening degree of the gas proportional control valve 17, opens the valve 17, and causes combustion. A signal from the water amount sensor 25 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 temperature sensor 16, and the signal is input to the hot water supply temperature controller 18, which finely adjusts the opening of the gas proportional control valve 17 and sets the temperature to the hot water supply pipe 5 for the bathtub. flows.

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 into the upper circulation pipe 4 in the automatic bath pot 1, and when the set amount is reached, the automatic hot water temperature control section The water flow sensor 25 of 18 detects the water flow, 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 signal activates the circulation pump 12 to close the bathtub. The hot water inside 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. Then, the temperature sensor 15 detects the temperature at the outlet 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 bath gas valve 13 is closed based on the signal. At the same time, the circulation pump 12 is stopped. When the temperature inside the bathtub drops, a signal is inputted from the overall control circuit 28 to the boiling controller 11 by operating a remote control or the like to operate 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, as shown in Figures 7 and 8, fluctuations in the hot water temperature at the start of hot water tap and fluctuations in hot water temperature due to changes in the hot water amount during use are eliminated. You can get warm water.

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.

Therefore, the present invention provides a water flow sensor and a temperature sensor in the water inlet pipe downstream of the hot water heat exchanger, inputs each signal to the hot water temperature controller, and performs gas proportional control along with the signal input from the temperature sensor of the automatic hot water temperature control section. In addition to controlling the valve, the shutoff valve installed in the hot water supply pipe for the bathtub is opened and closed by the water supply controller via the water supply controller based on the signal from the water flow sensor, so it is possible to prevent fluctuations in the hot water temperature at the start of hot water dispensing or the amount of hot water dispensed during use. Fluctuations in hot water temperature due to changes are eliminated, and hot water at the set temperature can be stably obtained, and even if hot water is used in the kitchen while hot water is being supplied to the bathtub, hot water supply to the bathtub is temporarily stopped, ensuring a sufficient amount of hot water. The ease of use is improved, and the water flow sensor can also be used as a gas proportional control valve and a shutoff valve, and 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, Figs. FIG. 6 is a system diagram showing an embodiment of the invention, FIG. 6 is a flowchart showing an embodiment of the invention, and FIGS. 7 and 8 are temperature distribution diagrams showing an embodiment of the 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 flow sensor 9 Shutoff valve 10 Heat exchanger for bath pot 11 Boiling controller 12 Circulation pump 13 Gas valve for bathtub 14 Water flow sensor 15 Temperature sensor 16 Temperature sensor 17 Gas proportional control valve for hot water supply 18 Hot water temperature controller 1
9 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 flow sensor 26 Temperature sensor 27 Automatic boiling control section 28 Overall control circuit 29
Pana Patent Attorney Kunihiko Wakabayashi

Claims (1)

[Claims] 1. For bathtubs, the hot water supply pipe from the hot water heat exchanger is branched, and one side has a branch pipe connected to the end equipment, and the other side is connected to the circulation pipe of the bathtub, and a water flow sensor, shutoff valve, etc. are installed in the middle. An automatic hot water supply control part is provided with a hot water supply pipe and a hot water supply controller that controls the valve based on the signal from the sensor, and the signal from the hot water supply controller is sent to the circulation pipe that connects the bathtub heat exchanger and the bathtub. A circulation pump that inputs input to the controller to flow water, a water flow sensor that detects water flow and inputs that signal to the boiling controller to control the bath gas valve, and a water flow sensor that detects the water temperature and sends the signal to the boiling controller. The automatic boiling control part is equipped with a temperature sensor, etc. that controls the circulation pump and gas valve by inputting the signal to the hot water temperature controller, which detects the water temperature from the hot water heat exchanger and inputs the signal to the hot water temperature controller. In an automatic bathtub equipped with a heat exchange function for hot water supply and bathtub boilers, which consists of an automatic hot water supply temperature control part equipped with a temperature sensor that controls the gas valve, a water flow sensor and a temperature sensor are installed in the water inlet pipe downstream of the heat exchanger for hot water supply. Each signal is input to the hot water supply temperature controller, and the gas proportional control valve is controlled together with the signal input from the temperature sensor of the automatic hot water supply temperature control part, and the signal from the water flow sensor is sent to the hot water supply pipe for the bathtub via the hot water supply controller. An automatic bath pot characterized by opening and closing a provided shutoff valve.