JP2000030581A - Mechanism for preventing excessive rise of temperature of heat exchanger for sanitary cleaning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To give no perfunctory restriction to a joint flange part which is important to secure strength as a pressure container, by providing a temperature fuse on the bottom part of a heat exchanger unit. SOLUTION: A wall 8 is provided all around a temperature fuse 7 positioned at the bottom surface of a heat exchanger unit. A connecting part 10 of the temperature fuse 7 to a lead wire 9 is disposed at a lower part than a detecting part 7-a of the temperature fuse 7. The temperature fuse 7 with all sides surrounded by the wall 8 is sealed by a resin sealing material 11. A fixing part of the temperature fuse 7 is placed inside a flange 12 connecting the upper and lower heat exchanger unit if viewing by a projected area. Since the wall 8 is provided around the temperature fuse, even if the temperature fuse 7 exists on the bottom part of the heat exchanger unit and condensed water gathers around the temperature fuse 7 part, the temperature fuse 7 is insulated from the water, and there is no fear of causing corrosion in the detecting part of the temperature fuse 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to arranging a thermal fuse on a bottom surface of a heat exchanger unit for producing hot water in a sanitary washing device to prevent burnout of the heat exchanger unit, and is particularly suitable for securing strength as a pressure vessel. The present invention relates to a heat exchanger overheat prevention mechanism.

[0002]

2. Description of the Related Art Conventionally, a sanitary washing apparatus has been provided with a thermal fuse in order to prevent burning in the event that an empty boil or the like occurs. Examples of the method for locating the thermal fuse are to attach a receiving plate directly to the mounting part of the heater to transmit the temperature, or to mount it near the heater on the outer surface of the heat exchanger unit. Performs a safety function against overheating.

[0003]

In the conventional thermal fuse fixing method, special parts for fixing the thermal fuse are required, and the strength of the heat exchanger unit as a pressure vessel is required because the thermal fuse is fixed. May be reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a temperature fuse having the strength and durability as a pressure vessel without deteriorating the overheat prevention performance which is the original purpose. It is an object of the present invention to provide a heat exchanger temperature rise prevention mechanism for a sanitary washing device which does not lower the performance.

[0005]

In order to achieve the above object, a pressure vessel for storing hot water for cleaning a part of a human body, a heater for heating the hot water, and a temperature of the pressure vessel are excessively increased. In the heat exchanger unit consisting of a thermal fuse that sometimes detects the temperature and cuts off the power to the heater, the thermal fuse is provided on the bottom of the heat exchanger unit, so it is important to secure the strength as a pressure vessel There is no restriction on the shape of the flange.

In order to achieve the above object, the connecting portion between the thermal fuse and the lead wire is located below the detecting portion of the thermal fuse, so that dew condensation on the surface of the heat exchanger unit detects the thermal fuse. There is no danger of corrosion damage due to wrap around.

In order to achieve the above object, the present invention is characterized in that walls are provided on all sides around the thermal fuse, so that even if thermal fuses are present on the bottom surface of the heat exchanger unit, dew condensation or the like will not occur. Even if it gathers in the part, the water is cut off to the thermal fuse, and there is no danger of causing corrosion to the detecting part of the thermal fuse.

According to a fourth aspect of the present invention, there is provided a special member for fixing the thermal fuse because walls around the thermal fuse are provided on all sides and the thermal fuse is sealed with a resin. And the thermal fuse is not exposed to the atmosphere of the humidity and the toilet detergent, and there is no possibility that the connecting portion of the thermal fuse is corroded.

According to a fifth aspect of the present invention, a wall provided on all sides around the thermal fuse is provided as a projected area with respect to a flange portion for connecting upper and lower parts of the heat exchanger. Since no flange is provided, it is possible to press the flange portion in the vertical direction without a difference in strength. In this case, when a technique of joining the upper and lower parts by friction heating called vibration welding is adopted, the difference in strength does not occur at each position of the flange.

[0010]

FIG. 1 shows an embodiment of a sanitary washing device. A cleaning device for cleaning a human body part is incorporated in a main body 2 disposed at the rear part of the toilet seat 1, and hot water is discharged through the nozzle 3 toward the human body part.

FIG. 2 shows an embodiment of a heat exchanger unit for producing hot water incorporated in the sanitary washing device. The water supplied from the water inlet 4 is sent out as warm water from the water outlet 5. The heater for heating the hot water is attached to the heat exchanger unit via the heater attachment 6.

FIG. 3 shows a thermal fuse 7 embodying the present invention.
The mounting state of is shown. Located on the bottom of the heat exchanger unit,
Walls 8 are provided on four sides around the thermal fuse 7. The connecting portion 10 between the thermal fuse 7 and the lead wire 9 is disposed below the detecting portion 7-a of the thermal fuse 7.
A thermal fuse 7 surrounded on all sides by a wall 8 is made of a resin sealing material 11.
Is sealed. Further, the fixing portion of the thermal fuse is disposed on the projected area inner side with respect to the flange 12 connecting the upper and lower sides of the heat exchanger unit.

[0013]

According to the present invention, the following effects are exhibited by the above configuration. According to claim 1, a pressure vessel for storing hot water for cleaning a local part of a human body, a heater for heating the hot water, and a temperature for detecting the temperature when the temperature of the pressure vessel rises excessively and cutting off the power supply to the heater. In the heat exchanger unit composed of a fuse, since the thermal fuse is provided on the bottom surface of the heat exchanger unit, there is no restriction on the shape of the joining flange which is important for securing the strength as a pressure vessel.

According to the second aspect, since the connecting portion between the thermal fuse and the lead wire is located below the detecting portion of the thermal fuse, dew condensation or the like on the surface of the heat exchanger unit goes around to the detecting portion of the thermal fuse and causes corrosion damage. There is no danger of causing.

According to a third aspect of the present invention, since walls are provided on all sides around the thermal fuse, even if thermal fuses are present on the bottom surface of the heat exchanger unit, even if condensed water or the like is collected at the thermal fuse portion, water is not removed. Are cut off with respect to the thermal fuse, and there is no fear of causing corrosion to the detecting portion of the thermal fuse.

According to a fourth aspect of the present invention, since walls are provided on all sides around the thermal fuse and the periphery of the thermal fuse is sealed with resin, no special member for fixing the thermal fuse is required, and The thermal fuse is not exposed to the atmosphere of the humidity and the toilet detergent, and there is no possibility that the connection portion of the thermal fuse is corroded.

According to a fifth aspect of the present invention, the wall provided on all sides around the thermal fuse does not enter as a projected area with respect to a flange portion for connecting upper and lower parts of the heat exchanger. Can be pressed without a difference in strength in the vertical direction. In this case, when a technique of joining the upper and lower parts by friction heating called vibration welding is employed, the difference in strength does not occur at each position of the flange.

[Brief description of the drawings]

FIG. 1 shows one embodiment of a sanitary washing device.

FIG. 2 shows an embodiment of a heat exchanger unit.

FIG. 3 is a mounting state diagram of a thermal fuse embodying the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Toilet seat 2 ... Main body 3 ... Nozzle 4 ... Water inlet 5 ... Water outlet 6 ... Heater attachment part 7 ... Temperature fuse 7-a ... Detection part 8 ... Wall 9 ... Lead wire 10 ... Connection part 11 ... Resin sealing material 12 … Flange

 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Tatsuya Furusou F-term (reference) 2D038 JB01 5G502 AA02 CC03 FF07 in 2-to-1 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka

Claims (5)

[Claims] 1. A pressure vessel for storing hot water for cleaning a local part of a human body, a heater for heating hot water, and a temperature for detecting the temperature of the pressure vessel when the temperature of the pressure vessel rises excessively and cutting off the power supply to the heater. A heat exchanger unit comprising a fuse, wherein the temperature fuse is provided on a bottom surface of the heat exchanger unit. 2. A connection part between a thermal fuse and a lead wire,
2. The heat exchanger overheat prevention mechanism according to claim 1, wherein the heat exchanger is located below a detection portion of the thermal fuse. 3. The heat exchanger temperature overheating prevention mechanism according to claim 1, wherein walls are provided on all sides around the thermal fuse. 4. A heat exchanger overheat prevention mechanism according to claim 1, wherein walls are provided on all sides around the thermal fuse, and the periphery of the thermal fuse is sealed with a resin. 5. The method according to claim 1, wherein walls provided on all sides around the thermal fuse do not enter a projected area with respect to a flange portion for connecting upper and lower parts of the heat exchanger. Heat exchanger overheat prevention mechanism.