JPS6027903B2 - water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water supply device using an instantaneous water heater, and an object of the present invention is to provide a comfortable water supply device that eliminates the delay in rising time of hot water due to the extension of the length of hot water supply piping. The purpose is to

In recent years, central hot water supply using large instant boilers has been increasing in households, but the hot water is used in the kitchen, washroom,
It is separated from the bathroom, so the length of the piping is inevitably long.

In this case, when the hot water supply pipes of the large instantaneous water heater 1 are connected to the bathroom 2 and the kitchen 3 as in the conventional example shown in FIG. 1, the longest pipe length is at the end. In the graph of Figure 2, t,
is the rise time of the hot water temperature of the large instant water heater itself, and t2 is the delay time for cooling due to the length of the piping. Therefore, in the case of the conventional example, the time it takes for usable hot water to come out even when you turn on the faucet in kitchen 3 is L + t2.Especially in winter, the pipe itself is cold, so the actual value is the pipe length + h. 40
It will take ~50 seconds. This makes the urgent need for central hot water supply pointless, especially in the kitchen, where there is no time to wait. Also, even if the piping is sufficiently protected with insulation, etc.
Since it has no effect on cooling during startup, there is a drawback that methods such as insulation cannot be used as a countermeasure. The present invention eliminates the above-mentioned conventional drawbacks, and embodiments thereof will be described below with reference to the drawings.

In FIG. 3, 4 is a large instant hot water condenser for central supply, 5 is its supply pipe, and 6 is a faucet at the end. 7
is a heat-retaining hot water storage tank, and a heater 8 is installed at an appropriate location.
is provided.

9 is a power supply, 10 is a sensor section that detects the temperature of the water in the tank, and 11 is a heating control section that controls ON/OFF of the heater 8 in response to a signal from the sensor section.

In the above configuration, the thermal storage tank 7 is installed as close as possible to the faucet 6, and if the power source 9 is turned on, the water (hot water) filled inside the thermal storage tank 7 will be heated. It is kept at a certain temperature by a heater 8 such as a heater. The hot water storage tank 7 itself is made of a material with good heat retention ability and has been properly insulated, but since it cools down little by little over a long period of time, the sensor unit 10 detects when the temperature drops below a predetermined temperature. It senses the temperature of the water inside and transmits it to the heating control section 11 to start heating. Also, for safety and ease of use, the function is such that when the water reaches a certain temperature, the heating stops and the water is kept warm. Therefore, when the faucet 6 is opened, the hot water in the salt storage tank 7 comes out quickly, which is convenient. Further, at the same time as the faucet 6 is opened, the large instantaneous water heater 4 is also ignited, and a predetermined amount of hot water subsequently comes out from the faucet 6. At this time, when hot water with a lower temperature enters the thermal hot water storage tank 7, the overflow control section 11 is turned on and the heater 8 instantaneously heats the hot water, so that the hot water within the range of the continuous running water is heated. is obtained. Based on the above configuration, the present invention has the following effects.

'1} It eliminates the delay in hot water temperature rise time due to extended piping, which is a disadvantage of central hot water supply using large instant hot water heaters, and makes it possible to realize a comfortable hot water supply life.

■ It uses a thermal storage tank system, so there is always hot water at the appropriate temperature, so the time it takes for hot water to come out of the faucet is extremely fast.

Even in the case of a small instantaneous gas water heater with almost no piping length, the water heater itself needs time to start up, but with the present invention, hot water comes out faster than that. ■ The thermal storage tank can be used with a commercial 100V power supply or batteries, so it is not limited to the installation location and can be installed in unused spaces in the house, and can be installed separately in multiple power points such as the kitchen and washroom. If it is attached to a location, the convenience mentioned in the effect {1} above can be achieved at each location.

[Brief explanation of the drawing]

FIG. 1 is a diagram of a conventional hot water supply system, FIG. 2 is a hot water temperature rise graph of a conventional example, and FIG. 3 is a diagram of a hot water supply system of an embodiment of the present invention. 4... Large instantaneous water heater, 5... Supply piping, 6...
Faucet, 7...Heat storage tank, 8...Heater, 9...Power supply, 1
0...Sensor section, 11...Heating control section. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1.Equipped with an instantaneous water heater and its hot water supply piping, a thermal hot water storage tank is provided in series in the middle of the hot water supply piping near a faucet far from the instantaneous water heater, and this thermal hot water storage tank is equipped with a heater for heating the tank, A hot water supply device characterized by being attached with a sensor section that detects the temperature of hot water in a tank, and a heating control section that controls a heater to control the temperature of hot water in the tank to a predetermined temperature based on a signal from the sensor section.