JPH03279717A - Hot water supply device - Google Patents

Abstract

PURPOSE:To make it possible to supply hot water of a constant temperature to a bathtub even when hot water is supplied to a shower, etc., by providing a water control valve in a bypass line and a hot water outlet temperature detector in the first hot water supply line to control hot water. CONSTITUTION:In order to supply hot water to a shower head 8 or a kitchen, hot water having been heated to a set temperature at a heat exchanger 1 and water are mixed at a mixing valve 9 to obtain hot water of suitable temperature for use. When hot water is supplied to other taps such as a shower head 8, etc., while the hot water is fed automatically to a bathtub 13, hot water of constant temperature is sent to said taps by a similar method. And the hot water having been heated to the same temperature as said taps is sent to the bathtub 13 through a first hot water supply line 2 and at the same time a water control valve 11 is opened to allow water to flow through a bypass line 10. A hot water outlet temperature detector 12 detects the temperature of a mixture of heated hot water and water to send the detected information to a control device 7 so that the control valve 11 is adjusted to control the temperature of the mixture to a set temperature and send it to the bathtub.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a water heater for automatically supplying hot water to a bathtub or the like.

Conventional technology In recent years, water heaters that automatically supply hot water to bathtubs have become popular in order to streamline housework.In the past, this type of water heater generally had the configuration shown in Figure 2. .

The configuration will be described below with reference to the drawings.

A bathtub 1 is installed on the discharge side of the heat exchanger 1 for heating tap water.
3, and a second hot water supply pipe 3 is provided in parallel with the first hot water supply pipe 2. A shutoff valve 4 is provided in the middle of the first hot water supply pipe 2, and a temperature detector 5 is attached to the discharge port side of the heat exchanger 1. The heat exchanger 1 is heated by a burner device 6, and the burner device 6 is controlled by a control device 7. This control device 7 is connected to the temperature sensor 5.
It is now controlled by. The second hot water supply pipe 3 supplies hot water to the shower head 8 via a mixing valve 9.

Problems to be Solved by the Invention In the conventional hot water supply device used to supply hot water to the bathtub 13 etc., the first hot water supply pipe 2 on the discharge side of the heat exchanger 1
Since the automatic hot water supply mode prioritizes the temperature supplied to the bathtub 13, the following problems arise. That is, in order to supply hot water to the shower head 8 etc. connected to the second hot water supply pipe 3, the water temperature is set to 60°C, for example.
Set the temperature to the appropriate temperature (for example, 4
When adjusting the temperature to 2°C), there was a temperature of 6
If hot water of 0° C. is supplied, the temperature will be too high for the shower head 8 side. Therefore, when the control device 7 is switched to the automatic hot water supply mode and the hot water temperature is set to (for example, 42° C.), the hot water temperature in the shower head 8 drops rapidly, so it is necessary to readjust the mixing valve 9.

The present invention solves the above problems, and aims to provide a hot water supply device that can supply hot water at a constant temperature to a bathtub, etc. even when hot water is supplied to a bathtub, etc. at the same time as hot water is supplied to a shower, etc. .

Means for Solving the Problems In order to achieve the above object, the present invention includes a first hot water supply pipe and a second hot water supply pipe branched from the first hot water supply pipe, A bypass pipe is provided between the pipe and the incoming water pipe, a water flow control valve is provided in the bypass pipe, and an outlet hot water temperature detection device is provided on the discharge side from the connection part with the bypass pipe in the first hot water supply pipe. The system is designed to control the temperature of hot water.

Effect of the present invention With the above-described configuration, hot water at a constant temperature can be supplied to a bathtub or the like by providing a water flow control valve in the bypass pipe and controlling the outlet temperature by providing a hot water temperature detection device in the first hot water supply pipe. .

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIG. Note that the same components as those in the conventional example are given the same reference numerals, and the explanation thereof will be omitted. The characteristic configuration of this embodiment is that, as shown in the figure, a bypass pipe 1o is led from the water inlet side of the heat exchanger 1 to the first hot water supply pipe 2, and in the middle of the bypass pipe 1O,
A water flow control valve 11 is provided. Further, on the discharge side from the branch point with the bypass pipe 10 in the middle of the first hot water supply pipe 2,
The configuration includes a hot water temperature detection device 12. The outlet hot water temperature detection device 12 sends a signal to the control device 7.

To explain the operation in the above configuration, the shower head 8
When using hot water (or in the kitchen), heat exchanger 1
Hot water heated to a set temperature (approximately 60 degrees Celsius) with a smell,
The water is adjusted to an appropriate temperature using a mixing valve 9 before use.

Next, when other taps such as the shower head 8 are used while automatically supplying hot water to the bathtub 13, hot water at a constant temperature is sent to the other taps in the same manner as described above. On the other hand, in the bathtub 13,
Hot water heated to the same temperature as the other taps flows through the first hot water supply pipe 2, and at the same time, the water flow control valve 11 provided in the bypass pipe 10 opens and water flows into the bypass pipe 10. Then, the outlet hot water temperature detection device 11 detects the temperature of the heated hot water sent from the first hot water supply pipe 2 and the hot water mixed with the water from the bypass pipe 10 and sends this information to the control device 7. The opening degree of a water flow control valve 11 is adjusted to control the flow of water so that the temperature reaches a set temperature, and hot water at an appropriate temperature is sent to the bathtub.

Even if only automatic hot water supply is used, hot water at the set temperature can be obtained in the same way as above.

Effects of the Invention As is clear from the above embodiments, the present invention includes a heat exchanger for heating tap water, a first hot water supply pipe for supplying hot water from the heat exchanger to a bathtub, etc. a second hot water supply pipe provided in parallel with the first hot water supply pipe; a control device for controlling the hot water temperature; and a bypass pipe connected to the first hot water supply pipe from the water inlet side of the heat exchanger. In addition, when a water flow control valve is provided in the bypass pipe, a hot water temperature detection device is provided on the discharge side of the connection with the bypass pipe in the first hot water supply pipe to control the temperature of the hot water. Even when hot water is being supplied to a shower head, etc., hot water can be supplied to a bathtub, etc. at a constant temperature, and there is no need for a mixing valve.
Furthermore, since the water passing through the bypass pipe and the hot water in the first hot water supply pipe are mixed, the resistance of the water channel is reduced, so that the water supply time can be shortened.

[Brief explanation of drawings]

FIG. 1 is a system configuration diagram of a water heater according to an embodiment of the present invention, and FIG. 2 is a system configuration diagram of a conventional water heater. DESCRIPTION OF SYMBOLS 1... Heat exchanger, 2... First hot water supply pipe, 3... Second hot water supply pipe, 7... Control device, 10 ...Bypass pipeline, 11...
... Water flow control valve, 12 ... Hot water temperature detection device.

Claims (1)

[Claims] A heat exchanger for heating tap water, a first hot water supply pipe led out from the heat exchanger, a second hot water supply pipe provided in parallel with the first hot water supply pipe, and a bypass pipe connected to the first hot water supply pipe from the water inlet side of the heat exchanger, a water flow control valve is provided in the bypass pipe, and a water flow control valve is provided in the first hot water supply pipe. A water heater that is equipped with a hot water temperature detection device that controls the hot water temperature on the discharge side from the connection part with the bypass pipe.