JPS62155816A - Water level display of electric pot - 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 Field of the Invention The present invention relates to a water level display device for an electric water heater that allows the water level in a container to be confirmed from the outside.

2. Description of the Related Art A conventional water level display device for an electric water heater of this type has a configuration as shown in FIG. 7, as disclosed in, for example, Japanese Utility Model Application Publication No. 57-191226. That is, the container 6 is placed on the outer side of the container 62 housed in the outer case 61.
A water level pipe S3 is installed vertically so as to communicate with the water level pipe S3, and a float 64 that moves up and down inside the water level pipe 63? : The upper and lower ends of the water level pipe 63 were connected to an upper projecting pipe 67 and a lower projecting pipe 68 communicating with the inside of the container 62 through ILL type tubes 55 and 66. Further, a frame 61 having a light emitting lamp 69 and a photoelectric sensor 6o provided on the outside of the water level pipe 63 is attached above the L-shaped tube 66 located at the lower end side of the water level pipe 63. By the vertical movement of the sensor, it was possible to detect whether it was in a transparent state or a blocked state. Note that 62 is a display plate attached to the outside of the outer case 51, and has a window 63 corresponding to the water level pipe 63.

Problems to be Solved by the Invention In such a conventional configuration, the water level pipe 63 is connected to the inside of the container 52 by two rubber-shaped tubes 55 and 66, upper and lower. At the time of connection, bending force or twisting force may act on the L-shaped tubes 55 and 56, which deforms the L-shaped tube 66 on the lower end side and causes the water level pipe 63 to close to the display plate 62. The light emitting lamp 69 and the photoelectric sensor 6 may be mounted diagonally to the window part 63, or
There are also problems with assembly, such as directionality and position regulation when the frame 61 provided with 0 is attached to the outside of the water level pipe 63, resulting in problems such as the inability to accurately detect the desired amount of liquid in the container 62. was there.

The present invention solves these problems, and has a simple configuration with high precision assembly, and when the liquid contained in the container reaches the desired amount, water supply or dry-burning detection can be reliably performed. The object of the present invention is to provide a water level display device for an electric water heater that can be used.

Means for Solving the Problems In order to solve the above problems, the present invention provides projecting pipes disposed at the top and bottom of the container so as to communicate with the inside of the container, and a float floatingly disposed within the water level pipe. The water level pipe is interposed with a light emitting element and a light receiving element, which constitute water supply or dry firing detection means by blocking the float, in an L-shaped water pipe that connects the lower protruding pipe and the lower end of the water level pipe. A light-emitting element hole and a light-receiving element hole are provided so as to be disposed facing each other in a state in which the water pipe has a light-emitting element hole and a light-receiving element hole, and a regulating piece for preventing the downward movement of the float at a predetermined position is integrally extended approximately on the center line inside the water tube. It is formed by deformation.

Function: According to this configuration, the connection and positioning of the water level pipe and the L-shaped water pipe are accurately performed, so that the tube may be installed in a deformed state diagonally or shifted vertically, or may be It can be reliably attached to the protruding tube that communicates with the container in a stable state at all times without having to force it using other members.

In addition, the water tube is provided with a light emitting element hole and a light receiving element hole that constitute water supply or dry firing detection means by blocking the float, and the liquid contained in the container reaches the desired level approximately on the center line inside the water tube. Since the regulating piece that prevents the downward movement of the float in the water level pipe at a predetermined position is integrally extended, it is possible to obtain a water level display device for an electric water heater that can perform reliable water supply or dry-burn detection. It is something.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 to 6. In the figure, reference numeral 1 denotes a cylindrical outer case, on the upper end of which a spout 2 is placed, and in the opening of the spout 2 a bottomed cylindrical container 3 is housed. Reference numeral 4 denotes a base provided at the lower end of the outer case 1, and this base 4 is screwed to a mounting bracket 5 provided on the bottom surface of the container 3, so that the outer case 1, the spout 2, and the container 3 are attached to the base 4. Fixed. 6 is a handle rotatably provided on the outer case 1; 7 is a lid that opens and closes the upper opening of the spout 2; this lid 7 is pivotally supported at the rear of the spout 2; A pump 8 is provided.

A heating element 10 is attached to the bottom of the container 3, and projecting tubes 11 projecting outward are provided at the upper and lower parts of the container 3.
．． 12 are formed. Reference numeral 13 denotes a water level tube made of a transparent glass tube, and this water level tube 13 is connected to the upper projecting tube 11 by connecting a communicating tube 14 to its upper end.
The lower end of the water pipe 16 is made of heat-resistant resin material and is formed into an oval shape.
The water tube 16 is attached to one end side, and the other end side of the water tube 16 is attached to the lower projecting tube 12. In addition, the inner diameters of both ends 16 and 1 of the water pipe 15 are set so as to provide a fitting clearance that does not cause rattling when the water level pipe 13 and the lower protruding pipe 12 are inserted, respectively. There is. The tips 18 and 19 of the both ends 16.17 have wide openings, and the water level pipe 13 and the lower protruding pipe 1 are inserted into the wide openings 18.19.
A substantially O-ring-shaped backing 20.
21 is installed. Reference numeral 22 denotes a positioning lip that determines the position of the attached water level pipe 13, and this positioning lip 22 is provided inside the water pipe 16 attached to the lower protruding pipe 12 so as to extend beyond the outer diameter of the water level pipe 13. Moreover, when the water pipe 16 is attached to the lower projecting pipe 12, the tip 12' of the lower projecting pipe 12 is prevented from coming into contact with the water level pipe 16 and damaging the water level pipe 16 entirely. Reference numeral 23 denotes a float provided in the water level pipe 16 so that it can float freely, and the float 23 allows the amount of liquid contained in the container 2 to be better determined.

Reference numeral 24 denotes a regulating piece that prevents the float 23 from moving downward at a predetermined position, and this regulating piece 24 is integrally formed to extend from below the inside of the water pipe 16 .

Further, in the water pipe 16, a light emitting element 26 and a light receiving element 26, which constitute water supply or dry firing detection means when the float 23 is cut off, are arranged facing each other with the water level pipe 13 interposed therebetween. A hole 27 and a light receiving element hole 28 are provided. 29 is a light emitting hole provided on the side of the light emitting element hole 27, and this light emitting hole 29 is a hole that faces the light emitting element 250 and the light emitting section 25. 3o is a light receiving hole provided on the side of the light receiving element hole 28, and this light receiving hole 30 is a hole that faces the light receiving portion 26' of the light receiving element 26.

Note that the regulating piece 24 has a substantially center portion of the float 23 that is connected to the light emitting portion 2.
6 and the light receiving portion 26 are formed to extend so as to be located above the center line.

Further, the light emitting hole 29 and the light receiving hole 30 are provided so as to be located above the backing 20 so that the stored liquid that has entered the water level tube 13 does not enter the light emitting hole 29 and the light receiving hole 30. . Reference numeral 9 denotes a board on which the light emitting element 26 and the light receiving element 26 are attached;
It is held at 1,32. 33 is the hook part 3 on the board 9
This is the shielding plate that was locked at 4.36.

Reference numeral 36 denotes a display board provided with a vertically elongated window 37 so that the water level pipe 13 can be viewed from the outside, and this display board 36 is attached to the outside of the outer case 1.

The water pipe 16 is provided with a notch 38 in the outer surface corresponding to the window 37 so that the float 23 can be viewed from the outside at the lower end of the window 37. 39.40
Reference numeral 41 indicates a water boiling lamp and a heat retention lamp indicating the energization state of the electric water heater, 41 a water supply lamp indicating water supply or dry-burning detection, and 42 a reboiling switch.

As described above, the water pipe 16 is attached to the lower protruding pipe 12 that communicates with the inside of the container 3, and is formed into a substantially oval shape using a heat-resistant resin material so as to have a diameter approximately the same as the outer diameter of the water level pipe 13. teeth,
The tip portions 18.19 of both end portions 16.17 have wide openings, and a substantially O-ring-shaped backing 20.21'i is interposed in the wide opening portions, and the water level pipe 13 and the protruding tube 12 are press-fitted in a watertight manner. Further, in this abbreviated water pipe 16, a light emitting element 26 and a light receiving element 26, which constitute water supply or dry firing detection means by blocking the float 23, are arranged facing each other with the water level pipe 13 interposed therebetween. A light-emitting element hole 28 and a light-receiving element hole 29 are provided for the water pipe 16, and a regulating piece 24 for preventing the downward movement of the float 23 at a predetermined position is integrally formed extending substantially above the center line inside the water pipe 16. Because of this, it is possible to perform highly accurate assembly with a very simple configuration, and the container 3
When the amount of liquid stored in the container reaches a desired level, water supply or dry firing detection can be carried out reliably.

Further, the tip portions of the water level tube 13 and the protruding tube 12 attached to the water tube 16 are located at both ends 16 of the water tube 16, which have approximately the same diameter.
17, the position of the water level pipe can be accurately regulated. Furthermore, since the rattling of the water level tube 13 is reduced, the sealing performance of the liquid is improved, and as a result, liquid that has entered the water level tube 13 enters the light emitting hole 29 and the light receiving hole 30 located above the backing 20. This also eliminates the possibility that the stored liquid will infiltrate.

Effects of the Invention As described above, according to the present invention, the L-shaped water pipe that connects the lower end of the water level pipe and the lower protruding pipe that communicates with the inside of the container constitutes a water supply or dry firing detection means by blocking the float. A light-emitting element hole and a light-receiving element hole are provided in which a light-emitting element and a light-receiving element are arranged facing each other with the water level tube interposed therebetween, and a hole is provided below the float on approximately the center line inside the water tube. Since the regulating piece that prevents movement at a predetermined position is integrally formed, it is possible to assemble with a very simple structure and high precision, and the amount of liquid stored in the container reaches the desired level. At this time, water supply or dry firing detection can be performed reliably.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a main part of a water level display device for an electric water heater showing an embodiment of the present invention, Fig. 2 is a perspective view showing the overall configuration of the water heater, and Fig. 3 is a longitudinal cross-section of the water heater. Figure 4 is a sectional view of the water level display device of the same water heater viewed from above, Figure 6
The figure is a vertical cross-sectional view of the main part of the same water level display device, FIG. 6 is a vertical cross-sectional view of the water level display device section of the same water heater, and FIG. 7 is a vertical cross-sectional view of the water level display device section of a conventional electric water heater. . 1...Outer case, 3...Container, 10.
... Heating element, 11 ... Upper protruding pipe, 12
...Lower protruding pipe, 13...--Water level pipe, 1
6... Water pipe, 23... Float, 24...
... Regulation piece, 25 ... Light emitting element, 26 ...
... Light receiving element, 27 ... Light emitting element hole, 28
...... Light receiving element hole. Name of agent: Patent attorney Toshio Nakao and one other person I3
-Bo (i Blue 15-Water tube z3-Float 2a-Light receiving element-) Koshi Fig. 3 51θ 95 Fig. 6 Fig. I!

Claims (1)

[Claims] an outer case in which a cylindrical container with a bottom is disposed; a display board provided on the outer case and provided with a vertically elongated window; a heating element that heats the liquid contained in the container; a water level pipe installed upright within the display board corresponding to the window; protruding pipes installed at the top and bottom of the container to communicate with the inside of the container; and a float freely floating within the water level pipe. , a communication pipe connecting the upper end of the water level pipe and the upper protruding pipe, and an L-shaped water pipe connecting the lower end of the water level pipe and the lower protruding pipe; , a light-emitting element hole and a light-receiving element hole are provided for arranging a light-emitting element and a light-receiving element, which constitute a water supply or dry-burning detection means by blocking the float, to face each other with the water level pipe interposed; A water level display device for an electric water heater, characterized in that a regulating piece for blocking the downward movement of the float at a predetermined position is integrally formed extending substantially on the center line inside the water pipe.