JPS58104452A - Liquid heater - Google Patents

Abstract

PURPOSE:To heat the liquid in a heater according to the required quantity thereof to thereby increase the econmical property of the titled boiler by a method wherein the heating of the liquid is stopped when the signals from a plurality of temperature sensors arranged vertically on the side wall of the heater indicate that a predetermined amount of heating of the lqiuid is reached. CONSTITUTION:A heating resistor 8 and a cylindrical body 25 for regulating the liquid at the time of heating are provided within the heater 1 having a liquid inlet port 6 and a liquid outlet port 7 and the plurality of temperature sensors 3-5 for detecting the temperature of the liquid are arranged vertically on the side wall of the heater 1. In short, the signals from the temperature sensors 3-5 are utilized as control inputs to the heating resistor 8 so that is is possible to heat only the required quantity, for example, 1/2 or 1/3 of the liquid, to thereby eliminate the loss of heat radiation and to improve the economical property of the heater.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to liquid heating devices such as electric water heaters or hot water boilers.

As shown in FIG. 1, a conventional liquid heating device of this kind has a can body having a heating device 8 inside, a liquid inlet 6 at the bottom, and a heated liquid outflow lower at the top. 1. A thermostat that detects the heating temperature of the liquid and opens and closes the power supply circuit from the power source 10 to the heating device 8 is provided on the side wall of the can body 1, and a temperature detection device 2 that detects the temperature of the liquid inside the can body 1 is disposed. It is set up. The temperature detecting device 2 has a plurality of temperature detecting elements 3, 4.5 arranged in the vertical direction, and operates a remaining amount display meter 21 using the signals thereof. 22 is a DC power supply.

When the liquid in the can body 1 reaches a set temperature, the thermostat 24 opens the power supply circuit to the heating device 8 and stops heating.

In addition, the temperature detection elements 3, 4.5 detect the temperature change of the can body 1, which changes as the liquid heated by the liquid flowing in from the inlet port 6 is pushed up and discharged from the outflow lower, and turns on and off. The amount of heated liquid remaining in the can body 1 is displayed. In other words, temperature sensing elements 3 and 4.5 are turned on.
, the load resistance to the DC power source 22 is changed in accordance with the OFF operation, and the remaining amount of heated liquid in the can body 1 is displayed based on the current value (pointer position) of the remaining amount display meter 21.

That is, conventionally, the thermostat 24 disposed on the lower side wall of the can body 1 is fixed at a certain operating temperature, so all the liquid in the can body 1 is heated to the set temperature. For this reason, the amount of water that is not used must also be heated, resulting in unnecessary heat loss.

The present invention has been made with the above-mentioned problems in mind, and an object of the present invention is to control the heating of the liquid in the can according to the required amount to improve economic efficiency. A heating device and a cylindrical body for rectifying the liquid during heating are provided inside the can, and a plurality of temperature sensing elements are arranged vertically on the side wall of the can to detect the temperature of the liquid. The heating of the liquid is stopped when a predetermined amount of heating is reached based on a signal.

Based on this configuration, the signal from the temperature sensing element is used as a control input to the heating device, and the liquid inside the can is heated by the required amount, e.g.
3 Perform heating control 1.・It reduces heat radiation loss.

An embodiment of the present invention will be described below based on FIGS. 2 to 6. In addition, the same parts as in FIG.
04452(2) Description will be given with reference numerals.

In FIG. 2, 1 is a can body, inside which is a heating device 8 and a cylindrical body 25 that rectifies the heated liquid during heating.
is provided so that the heated liquid is accumulated sequentially from the upper part of the can body 1 toward the lower part. Further, the heated liquid flows into the can through the inlet 6 of the can 1, and an example of a cylindrical body 25 that rectifies the liquid during heating is shown in FIGS. 3 and 4 a and b of the can. . 3 shows an example of a cylindrical cylindrical body 25, and FIG. 4 shows an example of a semicircular cylindrical body 25.

Figure 6 shows the basic configuration diagram. In FIG. 5, reference numeral 2 denotes a temperature detection device for detecting the temperature of the liquid within the can body 1, and is composed of temperature detection elements 3, 4, 5, . . . arranged vertically. Reference numeral 12 denotes a controller section, which includes a remaining amount indicator 13 that displays the remaining amount of liquid in the can body 1, and an operation section 17 that sets the required amount of heating of the liquid.

The remaining amount indicator 13 is an LED or a miniature bulb 18, 19, 20...
This is an indicator that displays the amount of liquid remaining in the can 1 by flashing ... or by reading an ammeter. The operation unit 17 sets the required amount of heating of the liquid using switches 18, 19, 20, . . . . A power supply 1o supplies power to the heating device 8 via a power control element 9.

Reference numeral 11 denotes a control circuit section composed of semiconductor elements, relays, etc., which receives a signal from the temperature detection device 2 and operates the remaining amount indicator 13, and also operates the switch 18 of the operation section 17.
19. The power supply to the heating device 8 is turned ON and OFF by the operation of 20... and the signal from the temperature detection device 2.
The power control element 9 is driven by determining whether the power is F or not.

Next, specific operation will be explained using the circuit example shown in FIG.

In FIG. 6, the temperature detection elements 3, 4, 5, . . . input a signal of "L" when the temperature of the liquid is low, and a signal of rHJ when the liquid is heated to the set temperature, to the control circuit section 11. .

The control circuit 11 receives input from the temperature detection elements 3, 4, 6, determines the amount of liquid heating in the can body 1, and displays the remaining amount indicator 13.
and outputs a drive signal for the power control element 9. In this case, switches 18 and 19 of the operation unit 17 that control the heating amount
, 20 control the output of the drive signal to the power control element 9.

For example, if only the switch 18 is turned ON (closed), the liquid in the can body 1 is heated by the heating device 8, and the can body 1 is heated.
When the temperature gradually rises from the upper part of the liquid and the liquid is heated to the position of the temperature sensing element 3, an "H" signal is input from the temperature sensing element 3 to the control circuit section 11. When the control circuit unit 11 determines that the input signal from the temperature detection element 3 is rHJ, it outputs an OFF output signal to the power control element 9, opens the power supply circuit to the heating device 8, and stops energization. . That is, when the liquid in the can body 1 is heated to the position of the temperature sensing element 3, power supply to the heating device 8 is automatically stopped, and the amount of heating of the liquid in the can body 1 is controlled. Similarly, when the switch 19 is turned on (closed), the power supply to the heating device 8 is stopped when the temperature detection element 4 is heated to the position.

Note that the input signals from the temperature sensing elements 3, 4.5 are determined by the control circuit section 11 as rHJ and rLJ, and the can body 1
An output signal is also generated to drive the remaining amount indicator 13 in accordance with the amount of heating within. For example, when the remaining amount of liquid heating in the can body 1 reaches the position of the temperature detection element 3, the indicator 14 is turned on.

As described above, the present invention uses the signal from the temperature detection device 2 disposed on the side wall of the can body 1 as a control input for the liquid heating device 8, and by controlling the amount of heating, it is possible to always It is possible to control the heating amount of the liquid according to the required amount without heating the entire liquid, eliminate heat radiation loss, and achieve an economical effect.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a conventional liquid heating device, Fig. 2 is a schematic block diagram of a liquid heating device according to an embodiment of the present invention, Fig. 3 is a perspective view of a cylindrical body in the same device, and Fig. 4 a , b are a schematic configuration diagram and a cross-sectional view thereof of a liquid heating device according to another embodiment of the present invention, FIG. 6 is a configuration diagram of the liquid heating device of the present invention, and FIG. 6 is a circuit diagram thereof. 1...Can body, 2...Temperature detection device, 3,
4, 5...Temperature detection element, 6...Inflow port, 7...Outlet port, 8...Heating device, 9
...Power control element, 10...Power supply, 11
... Control circuit section, 12 ... Controller section, 13 ... Remaining amount indicator, 14, 15, 16
...Display unit, 17...Operation unit, 1B, 19
．． 20... Switch, 25... Cylindrical body. Name of agent: Patent attorney Toshio Nakao and one other person□・
. Figure 1 Figure 2

Claims (1)

[Claims] A can body with a heating device inside and a cylindrical body that rectifies the liquid during heating, a can body having a liquid inlet and an outlet, and a plurality of liquid temperature sensing devices arranged vertically on the side wall of the can body. 1. A liquid heating device comprising a plurality of temperature sensing elements, and stopping heating of the liquid when a predetermined amount of heating is reached according to a signal from the temperature sensing element.