JPH0515872Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an electric water heater that heats and keeps a liquid contained in a container warm.

Prior Art As shown in FIG. 4, a conventional liquid pump 101 of an electric water heater is installed by attaching a mounting plate 103 to a flange of a pump case 102 made of resin or the like.
and attach this mounting plate 103 to the container 104.
It was fixed to a heat shield plate 105 attached to. Further, one end of an introduction pipe 107 is connected to the suction port 106 of the liquid pump 101 via a connection packing 110, and the other end of this introduction pipe 107 is connected to a waterproof fitting 109 fixed to the container 104 via a waterproof packing 108. It was connected. 111
is the motor.

Problems to be Solved by the Invention However, in such a conventional configuration, the suction port 10 of the liquid pump 101 from the motor 111 is
The mounting of this type of liquid pump 101, in which the motor 111 is relatively long in the axial direction toward the end of the motor 6, is unstable. The position will be biased toward the motor 111 portion, which has a large weight. Therefore, the suction port 106 portion at the tip of the liquid pump 111 will have a large degree of freedom, and as a result, the mounting plate 10
3, the suction port 106 at the tip rotates due to the torque, making it very inconvenient to connect the introduction pipe 107. Also, when an impact is applied, the suction port 106 at the tip rotates. There was a problem in that the opening 106 moved, causing an abnormality in the connecting part.

The object of the present invention is to provide an electric water heater that solves these problems.

Means for Solving the Problems In order to solve the above problems, the present invention provides a bottomed cylindrical container, a heating element that heats the liquid contained in the container, and a heating element that covers the bottom of the container. a liquid pump consisting of a heat shield plate fixed to a container, a guide hole opening downward from the bottom of the container, a pump case having a suction port at the tip, and a motor,
The suction port at the tip of the liquid pump is connected to the guide hole through a substantially L-shaped waterproof packing, and a mounting member is fixed to the pump case, and this mounting member is attached to the heat shield plate. .

Function According to the above configuration, the liquid pump is installed by attaching the mounting member fixed to the pump case to the heat shield plate, and opening the suction port at the tip of the liquid pump downward from the bottom of the container through the waterproof packing. Because it is attached in two places, such as in the guide hole, there is no worry about the suction port at the tip swinging or moving, and it can be fixed more securely than if it was attached in one place. Also, the fact that there is no vibration in the suction port at the tip means that the fixing position of the mounting member to the heat shield plate should be moved closer to the motor side.
The heavy motor part can be securely fixed, and the connection between the suction port at the tip and the guide hole is
Since the connection by waterproof packing also serves to form a flow path, more reliable fixing can be achieved without the need for other parts, which is extremely useful in terms of performance and cost.

Embodiment Hereinafter, an embodiment of the present invention will be described based on FIGS. 1 to 3. In the figure, 1 is a body, and this body 1 has a spout 2 fixed to its upper opening, and a hook 3 integrally attached to its lower end. Reference numeral 4 denotes a lid body which covers the spout 2 in a freely openable and closable manner, and is constructed so that it can be attached to and removed from the spout 2 by pressing a lock knob 5 provided substantially in the front of the lid body 4. A steam port 6 is provided in the lid 4 and communicates with the inside of a cylindrical container 7 with a bottom. Reference numeral 8 denotes a guide hole provided on the bottom surface of the container 7, and this guide hole 8 is connected to the suction port 11 of the liquid pump 10 via a waterproof packing 9 made of silicone rubber or the like and configured in a substantially L-shape. As shown in FIGS. 1 and 2, this liquid pump 10 has a suction port 11 and a jet port 1.
Pump case A13 having 2 and motor 14
a pump case B15 that fixes the pump case B15; an impeller 16 that is provided in the pump case A13 and has magnetism; a shaft 17 that supports this impeller 16; When the fixed magnetic pole plate 18 and the pump case A13 and pump case B15 are fixed, both 13 and 1
It is composed of a partition plate 19 and a packing 20 that fit between the pump case A1 and 5 and hold the inside of the pump case A13 watertightly.
By inserting the screw 21 from the 3 side and passing it through the pump case B15, and screwing the threaded part of the screw 21 into the mounting member 22, the pump case A13 and the pump case B15 are assembled, and at the same time, the pump case is installed. It is fixed to the member 22. The hole in the pump case B15 is made larger than the diameter of the screw, and the mounting member 22 is provided with a tapped hole. This liquid pump 10
The mounting member 22 is fixed to the heat shield plate 23 covering the lower part of the container 7 with screws 22a. Furthermore, due to the structure of this pump, it has a horizontally elongated shape, so it needs to be fixed at the suction port 11, but this is supported by inserting the waterproof packing 9 into the aforementioned guide hole 8. At this time, since the tip of the guide hole 8 is located near the tip of the suction port 11, this support is even stronger. In the installation work of the liquid pump 10, first install the suction port 1.
Insert the waterproof packing 9 attached to 1 into the guide hole 8, position it at one point, then set the positioning claw 24 of the mounting member 22 on the heat shield plate 23, and then
Fix with screws 22a. In this case, the mounting member 22
The positioning pawl 24 also functions as a steady rest and a rotation stopper.

In operation of the liquid pump 10, the motor 14 rotates and the magnetic pole plate 18 rotates by operating a switch (not shown). The impeller 16 is then rotated by the magnetic coupling. By this rotation of the impeller 16, the liquid in the container 7 is guided to the suction port 11 of the liquid pump 10 and the jet port 12
The liquid exiting the spout 12 passes through a discharge pipe 25, a water pipe bushing 27 containing a check valve 26, and is led out of the vessel from a discharge port 28.

In addition, on the back side of the bottom of the container 7, a heating element 29 formed by stacking insulating plates on top and bottom is installed using an aluminum material,
The heat diffusion plate 30 and the back plate 31, which are made of a metal with good thermal conductivity such as copper, are fixed in a crimped state. 32 is a container mounting plate fixed to the container 7 by welding. Further, the heat shield plate 2
3 is fixed to the container mounting plate 32, and the hook 3
It is clamped and fixed between the reinforcing metal fittings 33 and the container 7, which are connected and fixed. 34 is a temperature detection element, and 35 is a control circuit, which controls ON/OFF of the heating element 29, etc. Reference numeral 36 denotes a cushioning rubber, and this cushioning rubber 36 serves to alleviate the influence of vibrations caused by the motor 14 on the main body.

Effects of the invention As is clear from the description of the above embodiments, when the electric water heater of the invention is equipped with a liquid pump,
It is installed in two places: the mounting member fixed to the pump case is attached to the heat shield plate, and the inlet at the tip of the liquid pump is attached to the guide hole opened downward from the bottom of the container through waterproof packing. As a result, the suction port at the tip does not shake or move, and the connection between the suction port at the tip and the guide hole is made using waterproof packing to prevent the flow path from moving. Since it also serves as a forming device, it does not require any other parts, making it very useful in terms of performance and cost.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the main parts of an electric water heater showing an embodiment of the present invention, Fig. 2 is a side view of the main parts, Fig. 3 is a longitudinal sectional view of the electric water heater, and Fig. 4 is a conventional one. FIG. 1 is a longitudinal cross-sectional view of an electric water heater showing an example. 7... Container, 8... Guide hole, 9... Waterproof packing, 10... Liquid pump, 11... Inlet, 1
3, 15...Pump case, 14...Motor,
22...Mounting member, 23...Heat shield plate, 29...Heating element.

Claims (1)

[Scope of utility model registration request] A cylindrical container with a bottom, a heating element that heats the liquid contained in the container, a heat shield plate fixed to the container so as to cover the bottom of the container, and a heat shield plate that is opened downward from the bottom of the container. A liquid pump comprising a guide hole, a pump case having a suction port at its tip, and a motor, the suction port at the tip of the liquid pump being connected to the guide hole through a substantially L-shaped waterproof packing, and the pump An electric water heater comprising a mounting member fixed to the case and the mounting member attached to the heat shield plate.