JPS62233116A - Hot water service apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a domestic water heater.

BACKGROUND OF THE INVENTION Conventional water heaters of this type either use commercial power directly as a power source for the electric motor that discharges hot water, or
Alternatively, it was common to use a transformer to lower the voltage.

Problems to be Solved by the Invention However, if a commercial power source (1oOV AC) is directly used as a motor power source to drive a discharge device in a conventional water heater, the motor itself becomes larger due to the increased number of windings of the motor. . Also, when using a low-voltage motor, a transformer is required, so the discharge device becomes larger.
There were problems such as high prices.

The present invention is intended to solve these problems, and aims to provide a small and inexpensive water heater with a configuration that uses a heat-retaining heater.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a change-over start switch in the heat-retaining circuit that connects the heat-retaining heater and the DC motor in series when starting the pump.

Function According to the above configuration, by switching the switching start switch when starting the pump, the insulation heater and the DC motor are connected in series and a low voltage is obtained for the motor, so a small DC motor for low voltage is used. As a result, a small and inexpensive water heater can be provided.

EXAMPLE Hereinafter, an example of the present invention will be described based on the accompanying drawings. In FIG. 1, reference numeral 1 denotes an exterior main body of a water heater, and a container 2 for storing hot water is provided inside this exterior main body 1. Reference numeral 3 denotes an inner stopper attached to seal the mouth of the container 2. Reference numeral 4 denotes an upper lid attached to the upper part of the exterior main body 1 so as to be able to be opened and closed. Reference numeral 5 denotes a check valve, which passes through the inner stopper 3 and communicates with the container 2, and also communicates with the atmosphere through the boiling detection section 6.

7 is a DC motor provided at the bottom between the exterior main body 1 and the container 2. Reference numeral 8 denotes a centrifugal pump driven by a DC motor 7 , and a suction port 9 of this pump 8 communicates with the center of the bottom of the container 2 . 10 is a discharge port of the pump 8, and hot water is pumped upward through the discharge port 10 through a discharge pipe 11, and is poured from a discharge port 12 into a cup or the like.

Reference numeral 13 denotes a heater provided outside the bottom of the container 2, and as shown in FIG. 2, this heater 13 is composed of a heating heater 14 and a heat-retaining heater 16.

Reference numeral 16 denotes a changeover start switch for driving the DC motor 7 and starting the pump 8, and is operated via a rod 18 when a push button 17 is pressed. Reference numeral 19 denotes a compression type spring, and this spring 19 always urges the rod 18 upward.

20 is a temperature switch that controls the heating heater 14 when the temperature of the water in the container 2 reaches a predetermined temperature; 21 is a switch for keeping the water in the container 2 at a constant temperature; It is attached to the side wall of the container 2.゛And, as shown in FIG.
The other end of 4 is connected to a commercial power supply 22 via a temperature switch 2o, while the other end of the heat retention heater 16 is connected to a heat retention switch 21 and a power source for the DC motor 7 via a switching start switch 16. It is connected to the commercial power supply 22. 23 is a rectifier circuit for direct current.

In the water heater configured as described above, when hot water is to be supplied, when the push button 17 is pushed down, the rod 18 is pushed down, the switching start switch 16 is switched to the DC motor 7 side, and the DC motor 7 is energized. . As a result, the pump 8 rotates and the hot water in the container 2 is discharged from the discharge port 12. Then, when you release your hand from the push button 17, the spring 19
The push button 17 is pushed back. Thereby, the changeover start switch 16 is switched to the side that connects the heat retention heater 15 and the heat retention switch 21.

When discharging hot water in this way, by pressing the push button 17 and switching the changeover start switch 1e, the heat retention heater 16 becomes a resistor for voltage drop, so the DC motor 7 is used to drive the low voltage DC motor. can do.

Effects of the Invention As is clear from the above-mentioned embodiments, according to the present invention, when the pump is started by the changeover start switch, the insulation heater is connected in series with the DC motor. The motor can be made small and low-voltage, and as a result, no other voltage drop transformer or resistor is required, making it possible to obtain a water heater that is small and inexpensive overall. It is.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a water heater showing an embodiment of the present invention, and FIG. 2 is a circuit diagram thereof. 2...Container, 7...DC motor, 8.
...Pump, 15 ... Heater for keeping warm, 1
6......Switch start switch. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2

Claims (1)

[Claims] A container for storing hot water, a pump using a DC motor to discharge the hot water in the container, a heater for heating the hot water in the container and a heater for keeping it warm, and a heater for keeping warm and the DC motor when the pump is started. A hot water supply system consisting of a switching start switch in a heat insulation circuit connected in series.