JPH0439568A - Hot-water supplier - Google Patents

Abstract

PURPOSE:To permit the supply of hot-water with a stabilized temperature from a hot-water and water mixing cock by a method wherein fuel is controlled at a value set in a hot-water temperature setter while the set temperature of the hot-water temperature setter is corrected automatically in accordance with the detecting temperature of a supplying water temperature sensor. CONSTITUTION:The feedback of the detecting temperature of a hot-water temperature sensor an amount of combustion regulator 3 is effected by a hot-water temperature control means 7 to regulate fuel by the amount of combustion regulator 3 so as to eliminate a difference between a set temperature, set in a temperature setter 8. An output hot-water temperature correction control means 9 corrects the set temperature of supplying hot-water in accordance with a water temperature detected by a supplying water temperature sensor 6. A tap-controlled hot-water supplier 10 is connected to the hot-water and water mixing cock 12 of a hot-water supplying terminal through a hot-water supplying pipe 11. The hot-water supplying pipe 11 and a water pipeline 13 are connected to the hot-water and water mixing cock 12 and the temperature of the supplying hot-water is adjusted in accordance with the kind of usage. According to this method, hot-water having a stabilized temperature can be supplied from the hot-water and water mixing cock 12 of a terminal whereat the hot-water is used.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an instantaneous gas, oil, etc. water heater.

2. Description of the Related Art In recent years, kitchens, washrooms, baths, etc. in homes have been equipped with hot water mixing devices to mix hot water and water to obtain hot water at a desired temperature. The hot water heat source equipment under these terminal conditions is a storage type boiler that heats hot water to a high temperature or a constant temperature hot water type instantaneous water heater.

In this case, there is no problem with hot water storage boilers, but instantaneous water heaters have a minimum required flow rate for ignition and extinguishing, so when the hot water mixing device at the terminal restricts the hot water flow rate excessively, the burner There is a risk of ingestion. Conventionally, in this type of water heater, when the amount of hot water is excessively reduced, it is determined whether or not the burner has been extinguished, and the set value of the hot water temperature is adjusted downward (for example, in Japanese Patent Laid-Open No. 63 -161351).

Problems to be Solved by the Invention In such conventional water heaters, the set temperature is adjusted downward after determining whether or not the burner of the water heater has been extinguished while dispensing mixed hot water. There was a problem with fluctuations occurring. In addition, since the water supply mixer tap is built into the main body of the water heater, there is a problem in that the number of taps that can be used for hot water supply is limited.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a hot water supply device that stably supplies hot water at a temperature from a hot water mixing faucet of a terminal that uses hot water.

Means for Solving the Problems In order to achieve the above object, the present invention provides a hot water supply system that controls a combustion amount adjusting means for controlling the combustion amount of a burner that heats a heat exchanger to a value set by a hot water temperature setting device. This system includes a temperature control means and a hot water outlet temperature correction control means for automatically correcting the set temperature of the hot water temperature setting device according to the temperature detected by the water supply temperature sensor that detects the temperature of the water supply flowing into the heat exchanger.

According to the present invention, with the above-described configuration, the water supply temperature is corrected according to the temperature of the water supply flowing into the heat exchanger, so that it is possible to avoid the consumption flow rate of an instantaneous water heater in a hot water supply system using a hot water mixer faucet.

EXAMPLE Below, an example of the present invention is shown in FIGS. 1, 2, 5, and 3.
This will be explained with reference to the figures.

As shown in the figure, 1 is a hot water heat exchanger, 2 is a burner that heats the hot water heat exchanger 1, 3 is a combustion amount regulator such as a proportional control valve that adjusts the combustion amount of the burner 2, and 4 is a hot water heat exchanger. A hot water temperature sensor detects the temperature of hot water coming out of the vessel 1, 5 is a hot water heat exchanger 1
Based on the amount of water flowing through a water switch that detects the amount of water supplied to the burner 2, the amount of ignition water and the amount of extinguishing water are determined so that they can be used as on/off signals for burning and stopping the burner 2. 6 is hot water heat exchanger 1
A water supply temperature sensor 7 detects the temperature of water supplied to the water, and a combustion amount regulator 3 feeds back the temperature detected by the hot water temperature sensor 4 to eliminate deviation from the set temperature set by the temperature setting device 8.
This is a hot water temperature control means that controls the fuel at tJR, and the control side is a known feedback control using PID.

Reference numeral 9 denotes a hot water outlet temperature correction control means for correcting the hot water supply set temperature according to the water temperature detected by the water supply temperature sensor 6; 10 denotes an instantaneous hot water heater having the above configuration; Connect to. The hot water mixing faucet 12 is connected to the hot water pipe 11
and a water pipe 13 are connected to adjust the temperature depending on the purpose of use.

Normally, when a hot water mixer faucet 12 is used as a hot water supply terminal, the hot water temperature of the instant hot water heater 10 is set to a high temperature (60 to 80° C.) and is used in a fixed manner. Assuming the usage of hot water in a general household, the main operating temperature range is 37°C to 43°C for showers in washrooms, kitchens, and baths.

The hot water mixing formula is expressed as ((water supply temperature x water supply amount) ten (hot water temperature x hot water amount)) - (mixed hot water temperature x mixed hot water amount).

The most severe condition for instant hot water heaters when mixing hot water is when the water supply temperature is high in summer.

For example, in the case of the usage conditions shown in Table 1 (see the margin below), the tap water temperature is high in the summer, and the amount of hot water supplied in the kitchen etc. is 51/2.
If the instant hot water heater is used at a lukewarm temperature of 37°C, and the instantaneous hot water heater's set temperature is fixed at 70°C, the hot water output from the hot water heater will be reduced to about 1.3 f/min, and the hot water will be consumed. There is a fear. Although the amount of digested water depends on the minimum combustion performance of the water heater, the current mainstream is about 2 N/min or more.

The hot water temperature correction control means 9 automatically shifts the set temperature of the instantaneous hot water heater downward when the water supply temperature rises. FIG. 3 shows the control characteristics. The horizontal axis is the water supply temperature T1, the vertical axis is the instantaneous hot water heater set temperature T, and the hot water output QL indicates the set temperature T.

If fixed, the amount of hot water QL will fall below the amount of digested water Qoff, as shown by the solid line, but if the set temperature T of the instantaneous hot water heater is corrected according to the water supply temperature T1, as shown by the broken line, the amount of hot water QL will decrease. Water amount Qoff can be avoided. This correction is based on the supply water temperature T.

However, it does not matter whether it is proportional or threshold correction.

Figure 2 shows the automatic correction mode shown above for the temperature setting device 8, and the selection when a high hot water temperature is requested. Select the switch 8a, and select the high temperature mode switch 8b only when high water temperature is absolutely necessary.The high temperature mode should be about 70°C, and the automatic correction mode should be about 70°C to 50''C. If you leave it in place, you can mix hot and cold water at 43°C.

Effects of the Invention As described above, according to the water heater of the embodiment of the present invention, the range of use of a hot water supply system using a hot water mixer faucet is expanded by the instantaneous water heater equipped with a means for automatically correcting the hot water temperature according to the water supply temperature. Moreover, usability can be improved throughout the seasons.

[Brief explanation of the drawing]

FIG. 1 is a functional configuration diagram of a water heater according to an embodiment of the present invention, FIG. 2 is an external view of the hot water temperature setting device, and FIG. 3 is a control characteristic diagram of the hot water temperature correction control means. 1...Heat exchanger, 2...Burner, 3.
... Combustion amount regulator, 6 ... Water supply temperature sensor, 7 ... Hot water temperature control means, 8 ... Hot water temperature setting device, 9 ... ... Hot water temperature correction control means. Name of agent: Patent attorney Shigetaka Awano Haka 1 person 1P-Expressing device burner f firing amount Shinsho device 9% 1 Seisho-dou throwing mixed water i Sege-kaku Mi Ruri t Goa Yuto I Rimi 1 Figure 1 θ Figure 2 b & Figure 3 Az ('su

Claims (2)

[Claims] (1) a heat exchanger, a burner that heats the heat exchanger,
a combustion amount regulator that varies the combustion amount of the burner; a hot water temperature control means that controls the combustion amount regulator so that the outlet temperature of the heat exchanger is a value set by a temperature setting device; A hot water supply device comprising: a water supply temperature sensor that detects the temperature of water supply flowing into the water supply device; and a hot water temperature correction control means that automatically corrects the set temperature of the hot water temperature setting device according to the temperature detected by the water supply temperature sensor. (2) A hot water temperature correction control mode that automatically corrects the set temperature according to the water supply temperature in the hot water temperature setting device that sets the hot water temperature;
The water heater according to claim 1, further comprising a high temperature mode selection switch for setting a high set temperature.