JPS6213581B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an instantaneous hot water heater and a hot water tap that can control the amount of heating, and a hot water temperature controller for a hot water supply device that connects the two.

Fig. 4 shows the configuration of a conventional water heating system using a gas water heater as an example. A control device 5 that operates
A hot water tap 6 is provided at the hot water outlet and a hot water tap 6 provided at the location where the hot water is used is connected by a pipe 7.

In this case, the hot water temperature is controlled at the hot water outlet of the water heater, so the actual hot water supply temperature at the hot water faucet will be lower due to heat loss in the piping, and the temperature drop in the piping will be estimated. must be set.

Moreover, the heat loss of piping varies depending on the climate, so it has the disadvantage that it cannot be determined unconditionally. Furthermore, the temperature rise at the hot water faucet at the start of hot water supply is significantly delayed, as shown by the solid line in FIG. This is because the heat capacity of the piping is larger than the heat capacity of the water heater, and the amount of heat generated is controlled by the temperature of the hot water outlet of the water heater. In other words, even if the temperature of the hot water at the outlet of the water heater has reached the set value, the temperature of the hot water at the hot water faucet has not yet reached the set value, but the amount of heat generated is suppressed.

The present invention is intended to eliminate such conventional drawbacks, and aims to be able to set the temperature used in the water heater and to shorten the time required for the hot water outlet temperature to reach the set temperature.

In order to achieve this object, the present invention includes a temperature detector that detects the average temperature of the entire length of the piping, and a controller that controls the amount of heating of the water heater based on the signal from the temperature detector. It is something that

With this configuration, the heating amount of the water heater is controlled by the average temperature over the entire length of the piping, so hot water is supplied to the usable temperature at the hot water faucet, and the water heater heats the water in consideration of the heat capacity of the piping. In order to be
The time required for the tap water temperature to reach the usable temperature is short, and hot water can be heated quickly.

Hereinafter, one embodiment of the present invention will be described using the drawing of FIG. In FIG. 1, the same parts as in FIG. 4 are given the same numbers.

In the figure, 3' is a detector installed in the pipe 7 that detects the average temperature over the entire length of the pipe, and a control valve 4 that adjusts the gas supply amount based on the signal generated by this detector.
A control device 5' is provided for operating the.

Next, the state in which hot water is supplied by the hot water supply system with the above configuration will be explained using FIG. Either the hot water temperature rises rapidly, or the hot water temperature from the hot water tap 6 gradually rises with a delay due to the heat capacity of the piping, and even if the hot water temperature at the water heater outlet 2 reaches the set usage temperature, it will be much higher than the set value. is seperated. As shown by the solid line in the figure, in the conventional system, the amount of heat generated is throttled from this point on, so the rate of rise in the temperature of the hot water at the hot water tap 6 is suppressed, but in the system of the present invention, as shown by the broken line in the figure, Since the control valve 4 is operated at the average temperature of the piping, the temperature at the water heater outlet 2 rises until this average temperature reaches the set value, and the water temperature at the hot water tap 6 reaches the set value in a short time. Once the temperature is reached, the temperature can be set to the temperature that will actually be used.

In this way, since the amount of heat generated is controlled by detecting the average temperature of the pipes, the hot water supply temperature is set to the temperature that will actually be used, and hot water at the usage temperature can be obtained in a short time at the start of hot water supply.

Next, another embodiment of a temperature detector for detecting the average temperature over the entire length of piping will be described with reference to FIG. 8 is a polyester core wire, 9 is an inner-wound electrode wire, and 10 is a polymer heat-sensitive resistor made by mixing an insulating thermoplastic resin with an ion-conductive organic compound that is compatible with the thermoplastic resin to provide conductivity. , 11 is an outer wound electrode wire, 12 is a polyester film, and 13 is a heat-resistant vinyl coating.

Since the polymer heat-sensitive resistor 10 has a linear impedance temperature characteristic, accurate temperature control can be performed by using it as a temperature detection line of an electronic temperature control circuit.

In this way, by providing the temperature detection line of the polymer heat-sensitive resistor as a temperature detector along the piping, the average temperature of the piping can be easily detected and the amount of heat generated can be accurately controlled.

As described above, the hot water supply system of the present invention detects the average temperature of the pipes and controls the amount of heat generated by the water heater, so it can be set at the hot water temperature that is actually used, and there is no need to adjust it depending on the season etc. .

Since the hot water temperature of the water heater is controlled taking into account the heat capacity of the piping, hot water at the set usage temperature can be obtained in a short time.

Effects such as this can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing one embodiment of the hot water supply system of the present invention, Fig. 2 is an explanatory diagram of the operation of the above hot water supply system and a conventional hot water supply system, and Fig. 3 is a diagram showing another embodiment of the hot water supply system of the present invention. FIG. 4 is a block diagram showing a temperature detector, and FIG. 4 is a block diagram showing a conventional hot water supply system. 1...Water heater, 2...Water heater outlet, 3, 3'
...Temperature detector, 4...Control valve for adjusting the heat generator, 5, 5'...Control device, 6...Hot water tap, 7...
...Piping, 10...Polymer heat-sensitive resistor.

Claims (1)

[Scope of Claims] 1. An instantaneous hot water heater that can control the amount of heating, a pipe that connects both hot water taps, and a temperature detector that detects the average temperature of the entire length of the pipe installed in the pipe, and a temperature sensor that detects the average temperature of the entire length of the pipe. A water heater that has a controller that controls the heating amount of the instantaneous water heater based on the signal. 2. The water heater according to claim 1, which uses, as the temperature detector, a polymer heat-sensitive resistor in which an ion-conductive organic compound is mixed into the resin layer and whose impedance decreases sharply as the temperature rises.