JPS60165459A - Composite hot-water supplier - Google Patents

Abstract

PURPOSE:To prevent heat dissipating loss as well as water hammer by a method wherein supplying hot-water is introduced into an additional heating circuit at hot-water pouring circuit and the amount of supplying water is controlled. CONSTITUTION:The outlet of a forced water circulating type heat exchanger 17 is divided in the main body of the device at a branch 22 to supply hot-water from the hot-water pouring circuit 23 into a circulation type heat exchanger 18. A valve driving unit 25 is provided in the circuit 23, a supplying water amount control unit 36 is provided at the inlet of the heat exchanger 17 and a water level detector 37 is provided in the heat exchanger 18, while these units are controlled by a control unit 34 and a setter 35. The valve driving unit 25 is opened by the setter 35 and is closed by the signal of the detector 37 after the operation of the supplying water amount control unit 36. The hot-water is supplied into a bathtub 20 from the heat exchanger 17 through the heat exchanger 18, however, the bathtub 20 can be covered by a lid, therefore, the heat dissipating loss may be prevented. When the hot-water arrives at an objective water level, the flow amount thereof is regulated by the supplying water amount control unit 36 through the signal of the water level detector 37, therefore, water hammer will never be caused.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a composite water heater that uses gas, oil, electricity, etc. as a heat source and automatically heats a bathtub or the like.

Conventional Structure and Problems Conventionally, this type of automatic hot water supply system has been structured as shown in FIG.

A forced water flow type heat exchanger 2 (hereinafter referred to as heat exchanger A) and a natural circulation type heat exchanger 3 (hereinafter referred to as heat exchanger B) are provided in the appliance body 1, and a It is connected to the bathtub 5. The hot water outlet of heat exchanger A2 is divided outside the appliance and connected to hot water tap A.
6. Guided to hot water tap B7 (configured to face bathtub 5 etc.). Once the hot water tap B7 is manually opened, it automatically detects the flow rate and closes once a certain amount of water has been supplied.It is normally separate from the composite water heater and is a part that is installed during road construction. Its common name is water pita.

Further, a hot water temperature detector 8 is constructed at the outlet of the heat exchanger A2.

Fuel is supplied from the inlet portion 9, and heat is generated by heater A10 and heater Bll, which are provided corresponding to heat exchanger A2 and heat exchanger B3. Also, each fuel supply line has a fuel controller A.
12, constitutes a fuel controller B13. 14 is a setting device, and 15 is a control section. The setting device 14 also has a configuration in which it can be installed remotely.

When hot water is supplied by dropping into the bathtub 5 using the heat exchanger A2, when the hot water tap B7 is opened, the combustion controller AI2 turns on the heater A.
10 is supplied with fuel, and hot water supply starts at a hot water temperature according to the setting device 14. At this time, the bathtub 5 is in an open state, which causes a large heat radiation loss and poses a problem in energy saving. The hot water supply is stopped mechanically by the hot water tap 10, but since this operation is instantaneous, water hammer occurs and the hot water supply system vibrates abnormally. This phenomenon becomes more pronounced as the hot water supply flow rate increases (81/
(min or more) The higher the water pressure, the more intense the pressure waves, which affected other water piping parts, posing a big problem in terms of durability and use.

Purpose of the Invention The present invention eliminates such conventional drawbacks, and in order to prevent the water hammer phenomenon and heat radiation loss when hot water supply is stopped, the hot water is guided to the reheating circuit through a bypass circuit without sacrificing economic efficiency. The purpose of this system is to control the amount of water supplied, improve usability by supplying hot water with a large capacity (large flow rate), and improve reliability by preventing water hammer.

Structure of the Invention In order to achieve this object, the present invention divides the outlet part of one forced water flow type heat exchanger (hereinafter referred to as heat exchanger A) within the device body, and connects it to another natural enema circuit. Alternatively, it can be configured to supply water to a forced circulation heat exchanger (hereinafter referred to as heat exchanger B), with a valve drive unit in the enema circuit, a supply water flow control unit at the inlet of heat exchanger A, and a water level detection unit in heat exchanger B. The valve drive section is opened by the setting device and closed after the water supply amount control section is activated by a signal from the water level detector.

With this configuration, automatic hot water supply to bathtubs etc. is as follows.

At the same time as the setting device starts heating the heat exchanger A, the valve drive section opens, and hot water is supplied into the bathtub via the heat exchanger B. At this time, the bathtub can be kept in a sealed state (with a lid), which prevents heat loss and saves energy. Furthermore, when the desired water level is reached, the supplied water flow rate control unit regulates the flow rate to a small amount based on the signal from the water level detector, so no water hammer occurs even if the valve drive unit is closed. Therefore, when hot water is supplied, a large flow rate can normally be set, making it possible to supply hot water to the bathtub in a short period of time, and providing benefits in terms of usability.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to FIGS. 2 and 3.

In FIG. 2, a forced water flow type heat exchanger 17 (hereinafter referred to as heat exchanger A) and a natural circulation type heat exchanger 18 (
A heat exchanger (hereinafter referred to as B) is provided, connected to the bathtub 20 via the water pipe 19 of the heat exchanger B18, and a temperature detector 21 is provided at the outlet of the heat exchanger A17, and then a split part 22 is provided, and one side is injected. A hot water tap 2 with the other end connected to the hot water pipe 23 in the hot water supply circuit outside the appliance
4, a valve drive unit 25 is installed in the circuit of the pouring pipe 23, and a pouring port 26 is attached to the tip of the pouring pipe 23, and a water level detector 37 is connected to the pouring pipe 23.
It faces the water supply pipe 27 where the water supply pipe 27 is installed. The circuit of this pouring pipe 23 is collectively referred to as a bypass circuit.

The water supply pipe 27 is formed perpendicularly to the water pipe line 19 of the heat exchanger B18, and its height is set to be larger than the bathtub 20. Heater A2B and heater B2 are installed in heat exchanger A17 and heat exchanger B, respectively.
9 are correspondingly provided. The fuel supplied from the fuel supply port 31 is controlled according to the load by a fuel controller A32 and a fuel controller B33, and is generated in the heaters AB28 and AB29.

Further, a water amount detector 30 and a supply water amount control section 36 are provided at the inlet of the heat exchanger A17. Reference numeral 35 denotes a setting device 35 for heating, which may be installed remotely. 34 is a control unit which receives signals from each detector according to settings and operates each controller, valve, etc., and the valve drive unit 25 is opened by the setting device 35;
The closing operation is a control configuration that is executed after the supply water amount control unit 36 performs a throttling operation (3 to 6 f/m1n) based on the output signal of the water level detector 37. The amount of water during the opening operation is corrected by the temperature detector 21 according to the set temperature and the capacity of the heater A28.
The configuration is such that the maximum capacity is always exhibited, and the flow rate is normally about 12 to 2017 m1n.

FIG. 3 shows an example in which a forced circulation pump 38 is provided in the water circuit of the heat exchanger B18 for enema, and the other configurations are the same.

At the same time as the setting device 35 operates the valve driving section 25, the supply water amount control section 36 reaches its maximum opening, and the water amount detector 30
The fuel controller A32 operates in response to the signal (Sl), and the fuel generates heat in the heater A28.

The set temperature (T
The fuel controller A32 and the water supply amount control unit 36 are controlled so that the maximum hot water supply capacity is achieved so that the water supply capacity becomes the same.

Therefore, hot water is supplied into the bathtub 20 at a large flow rate, so that the bathtub 20 can be used for a short time and the usability is significantly improved.

Moreover, since hot water is supplied to the bathtub 20 in a sealed state, heat radiation is prevented, and there is also an energy saving effect.

At the same time, you can also save energy by heating water for a short time.

When the target water level is reached, the signal from the water level detector 37 (S2)
At this time, the supply water amount control section 36 becomes the minimum opening degree to regulate the water amount, and at the same time, the valve drive section 25 closes and the heating of the heat exchanger A32 stops. Since the amount of water is reduced due to the regulation of the amount of water, even if the valve drive section 25 closes instantaneously, water hammer is prevented from occurring, and durability can be improved. Furthermore, since the valve can be closed when warmed up, it can be realized with a simple valve configuration, and is expected to be reliable and economical.

Effects of the Invention As described above, according to the composite water heater of the present invention, the heat radiation loss and water hammer phenomenon that occur when hot water supply is automatically stopped during hot water supply can be prevented by the configuration of the bypass circuit, water level detector, and water supply amount control section. , it has the effect of realizing high-capacity heating, improving usability, energy saving, and reliability.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional combined water heater, FIG. 2 is a block diagram of a combined water heater which is an embodiment of the present invention, and FIG. 3 is a block diagram showing another embodiment of the present invention. 16...Appliance body, 17...Forced water flow type heat exchanger, 18...Natural or forced circulation type heat exchanger, 19...Water pipe line, 21...・Temperature detector,
22... Division part, 23 - Enema tube, 25... Valve drive part,
27 - Water supply pipe, 30... Water amount detector, 35... Setting device, 36... Supply water amount control section, 37... Water level detector. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
S Figure 2 Figure 3

Claims (1)

[Claims] A forced water flow type heat exchanger and another natural or forced circulation type heat exchanger are provided in the main body of the water supply device, and a water flow rate detector and a supply water flow rate control unit are provided on the water inlet side of the forced water flow type heat exchanger, and an output After installing a temperature sensor on the side, the hot water of the natural or forced circulation type heat exchanger is divided into parts within the equipment body, and one part is connected to the hot water supply circuit outside the equipment, and the other part is passed through a hot water pouring pipe equipped with a valve that forcibly opens and closes the hot water of the natural or forced circulation type heat exchanger. It constitutes a pouring circuit for pouring molten metal into the water supply pipe installed in the water pipe section, and the opening operation of the valve depends on the setting device, and the closing operation is detected via the natural or forced circulation heat exchanger. A composite water heater comprising means for controlling the supply water amount to a small amount by the water supply controller and then executing the operation depending on the hot water level and a set value.