JPS627232Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the improvement of water heaters, and in particular aims to enable smooth maintenance and inspection of temperature controllers.

Conventionally, as shown in FIG. 1, this type of water heater has a heating element 5 wrapped around the bottom of an inner container 2, and a top opening of the inner container 2 that can be opened and closed with a lid 4. A temperature controller 10 is attached to the bottom to control the power supply to the heating element 5.

However, the bottom of the inner container 2 of a water heater with such a configuration is crowded with the lead wires of the heating element 2, the temperature controller 10, the power supply section 12, and other attached parts thereof, making it difficult to control the temperature. Maintenance and inspection of the device 10 was extremely difficult. In addition, when performing maintenance and inspection of the temperature controller 10, if water is stored in the inner container 2, there is a risk that the water will be poured out. There was also the inconvenience of having to throw away the .

The present invention has been devised in view of the above-mentioned points, and will be explained below based on the drawings. Reference numeral 1 denotes a water heater body, an outer container 2 whose top surface is open, and an object housed in the outer container 2. A bottom cylindrical inner container 3 and the outer container 2
It is composed of a lid body 4, etc., which can open and close the upper opening of the lid body. The inner container 3 is a vacuum double wall 3
a and 3b, the upper surface opening of which is engaged with the upper surface opening of the outer container 2, and a heating element 5 consisting of an annular sheathed heater is wrapped around the outer bottom surface of the wall 3b, and the outer surface of the wall 3a is Support bodies 6, 6 are provided vertically on the bottom surface.

Note that the double walls 3a and 3b form a space S and serve as a heat insulating wall. The lid body 4 is rotatable via a pivot portion 7, and when the lid body 4 is closed, the inside of the inner container 3 is connected to the outside, and the steam generated in the inner container is discharged to the outside. This discharge passage 8 is bent into a square shape, and a heat-sensitive tube 9 with good heat conduction is integrally disposed approximately in the center. A temperature controller 10 is provided on the upper surface of the heat-sensitive cylinder 9 to control the supply of electricity to the heating element 5. Furthermore, the top surface 4a of the lid 4 is made detachable so that the temperature controller 10 can be removed. This temperature controller 10 is connected to the heating element 5 and the power source section 12 by a lead wire R via a hollow communication pipe 11.

13 is a handle fixed to the outside of the outer container 2.

According to this configuration, when the heating element 5 is energized, the inner container 3 is heated by the heating element 5, and the space S is also heated, and the heated space S further heats the inner container 3 from the entire surrounding area. The temperature of the water in the inner container 3 increases efficiently and in a short time without heat loss. The steam generated within the inner container 3 is discharged to the outside via the discharge passage 8. This steam is a small amount and its temperature is low when the water in the inner container 3 is just before boiling; As the amount of steam increases rapidly, its temperature also increases rapidly, and the temperature difference from the state immediately before boiling becomes large. Although this phenomenon is known, the temperature controller 10 utilizes this phenomenon to reliably detect the steam temperature and immediately after the start of boiling without interrupting the power supply to the heating element 5 in the state immediately before boiling. The power supply to the heating element 5 is cut off only in this state. And heat retention after boiling is hollow double wall 3a, 3b
It is possible to reliably keep warm in the space S formed by.

The present invention includes an outer container with an open top, a bottomed cylindrical inner container disposed inside the outer container, and a top opening of the outer container that can be opened and closed, and a portion of which can be removed. a lid, a heating element disposed at the bottom of the inner container, a discharge passage formed in the lid and communicating between the inside and outside of the inner container and guiding steam generated in the inner container to the outside; Since the temperature controller is provided close to the discharge passage and controls the energization of the heating element, maintenance and inspection of the temperature controller can be performed by removing a part of the lid. It is very easy to carry out the work because other electrical components do not get in the way and there is no need for troublesome work such as moving the outer container. Further, the temperature controller can reliably and quickly detect the boiling of the water in the inner container, and as a result, can sufficiently sterilize the water and suppress the temperature rise of the water heater. be.

[Brief explanation of the drawing]

Fig. 1 is a schematic sectional view of a conventional water heater, Fig. 2 is a sectional view of the water heater of the present invention, Fig. 3 is an enlarged sectional view of the main part of Fig. 2, and Fig. 4 is a schematic sectional view of the water heater of the present invention. FIG. 3 is an enlarged perspective view of main parts. 3... Inner container, 4... Lid, 5... Heating element, 8
...Discharge path, 10...Temperature controller.

Claims (1)

[Scope of utility model registration request] An outer container with an open top surface, a bottomed cylindrical inner container disposed within the outer container, and a lid body that closes the top opening of the outer container so as to be openable and closable, and a portion thereof is removable. , a heating element disposed at the bottom of the inner container;
a discharge passage formed in the lid body and communicating the inside of the inner container with the outside and guiding the steam generated in the inner container to the outside; and a discharge passage provided close to the discharge passage to control the temperature of the steam passing through the discharge passage. A water heater comprising: a temperature controller that detects the temperature and controls energization of the heating element.