JPH03931Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a temperature sensor mounting device for electric hot water storage containers such as electric pots, and is particularly suitable for mounting a temperature sensor in a part surrounded by a heater. The present invention relates to a mounting device.

(Prior art) This type of temperature sensor mounting device is disclosed in Japanese Patent Publication No. 62-5609, which holds the hot water storage container by applying it to the central hole of a flat annular heater that is applied to the bottom plane of the hot water storage container. known in the official gazette.

In this device, the temperature controller is held at the center of the bottom of the hot water storage container by pressing it with a holding metal fitting through a mounting member and a pressing spring, and the holding fitting is fixed to a receiver integrated with the hot water storage container, and the temperature controller and A heat shielding member with mounting wings is provided between the enclosing heater and the heat shielding member is pressed against the receiver using the holding metal fitting, and a part of the protrusion of the mounting wing of the heat shielding member is fitted into the mounting hole of the receiver to stabilize the heat shielding member. It's becoming like that. By placing this heat shielding member between the temperature controller and the heater, the heat of the heater does not directly affect the temperature controller, and the temperature controller can accurately detect the temperature of the liquid inside the hot water storage container. be.

(Problem that the invention aims to solve) However, the mounting structure of this device, including the insulation structure between the temperature controller and the heater, requires a large number of parts and a complex assembly process that requires a large number of assembly steps such as combining, fitting, and attaching parts. It becomes expensive and expensive. Further, the provision of special lead terminals between the temperature controller and the mounting member for wiring the temperature controller also causes high costs.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention holds a temperature sensor in a sensor holder integrally formed with a heat shielding peripheral wall with a space around it, and the temperature sensor is characterized in that it is pressed and held against a hot water storage container by a pressing member via a sensor holder.

(Function) A heat shielding peripheral wall is integrally formed around the sensor holder for mounting the temperature sensor, making it a single component, and when mounting the temperature sensor, it is held on the sensor holder, and the sensor holder is held by a pressing member to store hot water. It can be attached simply by pressing it against the container and holding it, and the structure can be simple and inexpensive with a small number of parts and assembly man-hours.

In addition, even with this structure, even when the attached temperature sensor is surrounded by the heater, it can be directly connected to the heater by both the heat shielding wall and the annular gap formed between it and the sensor holder. Thermal effects can be sufficiently suppressed, and the lead wire from the temperature sensor held in the sensor holder and applied to the hot water storage container can be easily drawn out without being affected by the heat of the heater or interfering with the temperature sensor mounting structure. I can do it.

Moreover, when the temperature sensor is assembled with the sensor holder in advance and then mounted, by drawing out the lead wire through the gap, the assembled state can be maintained and the sensor holder can be handled as an integrated object.

(Example) An example of the present invention shown in FIGS. 1 to 4 will be described. In this embodiment, there is a heater 1 inside the exterior body 6.
This figure shows the case of a boiling type electric pot that houses an inner container 2 with a water storage container as a hot water storage container.

The inner container 2 is made of stainless steel, and the outer container 6
are connected at the upper end by a shoulder member 3 made of synthetic resin, and at the lower end by a connecting fitting 4 and a middle sole member 5 made of synthetic resin, forming a container A of the electric pot.

This container A has a heat insulating cover 51 made of synthetic resin, ceramic, etc. placed around the inner container 2, and a heat insulating gap 52 formed between the inner container 2 and the inner container 2 to suppress air convection. The cover 51 has its upper end opening connected to the shoulder member 3, and its bottom portion fixed to a mounting bracket 37 attached to the lower surface of the bottom of the inner container 2 with screws 53.

The connecting fitting 4 is attached to the mounting fitting 37 by screws 36, and the inner sole member 5 is attached to the connecting fitting 4 by screws 36.
It is attached by 8. A bottom member 39 made of gold or resin is attached below the middle sole member 5.

A discharge port 7 for discharging the liquid content to the outside is integrally assembled to the shoulder member 3 at the front with a built-in overturning water stop valve 8, and a container lid (not shown) is removably supported at the rear. A steam sensor 10 mounted so as to face the bearing part 9 and a part of the steam release path provided in the inner lid (not shown) that closes the inner container 2 or the container lid.
is provided.

A discharge passage 11 is connected to one end of the lower part of the inner container 2 for discharging the content liquid pressurized by a bellows pump or the like in the container lid (not shown), and the tip of the discharge passage 11 is connected to the discharge port 7. The content liquid discharged from the discharge port 7 flows out from the discharge port 7. Derivation path 11
In the middle is a liquid amount display section formed by a transparent tube 12.

The heater 1 has a through hole 1a in the center, in which an insulating heater base having a mica plate, a heat-retaining heater wire, and a hot water heater wire wrapped around it, and a mica plate are sequentially fitted into a heater case made of an aluminum-plated steel plate or aluminum. It is formed into a flat disk shape.

The portion of the inner container 2 where the heater 1 is provided is the bottom surface 2a.
This is a recess 2b formed at the center of the lower surface of the . Recess 2b
The ceiling surface 2c of is formed into a flat surface, and this ceiling surface 2c
Heater 1 is applied to. A stainless steel backing plate member 31, heat insulating material, etc. are sequentially applied to the back of the heater 1, and the heater mounting plate 3 is attached to the back of the heater 1.
3, the heater 1 is held in contact with the inner container 2, and for this purpose, the heater mounting plate 33 is pressed against the mounting pieces 33 on both sides of the heater 1.
A is attached to the connecting fitting 4 using the same screw 36. A pressing protrusion 33b is provided on the heater pressing surface of the heater mounting plate 33 to press each part of the heater evenly.
have.

The contact plate member 31 and the heater mounting plate 33 have through holes 31a and 33c in the center like the heater 1, and
A heat-sensitive controller 34 is attached to the bottom center lower surface of the inner container 2 using the through hole 1a.

The heat-sensitive controller 34 detects the temperature of the liquid content and controls the energization of the heater 1, and has a temperature sensor 34b fitted in an aluminum exterior body 34a.
The content liquid is kept at a predetermined temperature by the temperature detection,
Alternatively, boiling is possible if necessary.

As shown in FIGS. 1 and 2, the heat-sensitive controller 34 is held in a sensor holder 21 made of heat-resistant resin and applied to the inner container 2, and is pressed through the sensor holder 21 by a pressing member 22 made of a spring plate. and the inner container 2. As shown in FIGS. 2 to 4, the sensor holder 21 is integrally formed with a heat shielding peripheral wall 24 connected by four radial ribs 25 with a gap 23 placed around it.
The front end 24a of the heat shielding peripheral wall 24 is connected to the sensor holder 2.
1 and has a length that does not protrude forward beyond the abutment surface 34c of the heat-sensitive controller 34 fitted into the pocket 21a of the sensor holder 21 against the inner container 2, and the rear end 24b is longer than the front end of the sensor holder 21. It extends largely toward the back and serves as a guide for receiving the pressing member of the sensor holder 21.

The pressing member 22 has a U-shaped pressing portion 22a and mounting pieces 22b at both ends, as shown in FIGS. 2 to 4. The pressing part 22a enters the back of the sensor holder 21 from the lower side of the connecting fitting 4 through the central cylindrical hole 4a, while being guided by the rear end 24b of the heat shielding peripheral wall 24 partially fitted therein,
As shown in FIG. 1, one mounting piece 22b is sandwiched between the connecting fitting 4 and a raised piece 4b raised from it, and the other mounting piece 22b is inserted into its mounting hole 22.
By fastening the connecting fitting 4 at part c with the screw 26, the pressing part 22a is pressed against the back of the sensor holder 21, and elastically presses the heat-sensitive controller 34 against the inner container 2 via the sensor holder 21. and hold it in close contact for installation.

At this time, the mounting position of the heat-sensitive controller 34 is regulated by the fit between the pressing portion 22a and the rear end side of the heat shielding peripheral wall 24.

The two lead wires 34d drawn out from the temperature sensor 34b of the heat-sensitive controller 34 pass through the notches 21b provided on both sides of the front end of the sensor holder 21 separately, and pass through both sides of the gap 23 to the sensor holder 2.
1. It can be pulled out to the back side and external wiring can be connected. When the heat-sensitive controller 34 is attached in combination with the sensor holder 21, it is possible to securely integrate it by gluing or the like so that it can be handled as a single component. It can also be replaced by

The pressing part 22a of the pressing member 22 has lead wires on both sides of the front end of the pressing part 22a in order to enable the lead wire 34d to be drawn out while maintaining the fitting state necessary for the positioning with the rear end side of the heat shielding peripheral wall 24. 34
A notch 22d is formed as a relief for the hole d.

Due to the mounting structure of the heat-sensitive controller 34, even if the heater 1 is provided around the heat-sensitive controller 34, the heat-sensitive controller 34 can be heated by both the heat shielding peripheral wall 24 and the gap 23 between it and the sensor holder 21. Direct thermal influence from the inner container 2 is sufficiently suppressed, and the temperature of the inner liquid can be accurately detected in a state of close contact with the inner container 2. Furthermore, the ceiling surface 2c of the portion of the inner container 2 that is in close contact with the heat-sensitive controller 34 is the most recessed part 2d that is further recessed inside the inner container 2, and the heater 1
The heater 1
It is possible to further alleviate the thermal effects from

Note that the sensor holder 21 and the heat shielding peripheral wall 24 may be made of various materials such as ceramics as long as they have heat resistance and heat insulation properties.

The midsole member 5 is provided with a microcomputer board 40 connected to the steam sensor 10, the heat-sensitive controller 34, the heater 1, etc. in the downward recess 5a, and controls the heater 1 to be energized. Microcomputer board 40
is attached to the ceiling wall 5b of the recess 5a with a screw 41 via a spacer protrusion 5c, and the screw 41 is designed not to penetrate upward through the protrusion 5c. As a result, even if water leaks from above, the microcomputer board 40 is protected by the ceiling wall 5b of the recess 5a.

(Effects of the invention) According to the invention, since it has the above-mentioned configuration and operation, the heat shielding peripheral wall is integrally formed around the sensor holder for mounting the temperature sensor and becomes a single component, and the mounting of the temperature sensor is The sensor holder can be attached by simply holding the sensor holder and pressing the sensor holder against the hot water storage container using a pressing member, resulting in a simple and inexpensive structure with a small number of parts and assembly man-hours.

In addition, even with this structure, even when the installed temperature sensor is surrounded by the heater, it can be directly connected to the heater by both the heat shielding wall and the annular gap formed between it and the sensor holder. The influence of heat can be sufficiently suppressed, and the temperature of the content liquid can be accurately detected without the influence of a heater.

Moreover, the lead wire from the temperature sensor held in the sensor holder and applied to the hot water storage container can be easily pulled out from the gap without being affected by the heat of the heater or interfering with the temperature sensor mounting structure, and no special terminal structure is required. This simplifies the structure and reduces costs.

Furthermore, when the temperature sensor is assembled with the sensor holder in advance and then mounted, by drawing out the lead wire through the gap, the combination state can be maintained and the sensor holder can be handled as an integrated object. It can be easily assembled without any special structure.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of an electric pot with the lid removed, showing an embodiment of the present invention, and FIGS. 2 to 4 are a cross-sectional view, a bottom view, and an exploded perspective view of a temperature sensor mounting portion. 1...Heater, 2...Inner container (hot water storage container), 2
1... Sensor holder, 22... Pressing member, 23...
... air gap, 24 ... heat shielding peripheral wall, 34 ... heat sensitive controller, 34a ... exterior body, 34b ... temperature sensor.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A temperature sensor is held in a sensor holder that is integrally formed with a heat shielding wall with a gap around it, and this temperature sensor is pressed against a hot water storage container by a pressing member through the sensor holder. A temperature sensor mounting device for an electric hot water storage container, characterized in that the temperature sensor is mounted on an electric hot water storage container. (2) The temperature sensor mounting device for an electric hot water storage container according to claim 1, wherein the sensor holder and the heat shielding peripheral wall are made of heat-resistant synthetic resin. (3) The temperature sensor mounting device for an electric hot water storage container according to claim 1, wherein the sensor holder has a pocket into which the temperature sensor is fitted and held so as to protrude somewhat. (4) The front end of the heat shielding peripheral wall on the hot water storage container side extends close to the surface where the temperature sensor held in the sensor holder presses against the hot water storage container. Any one of claims 1 to 3 of the utility model registration claims. A temperature sensor mounting device for an electric hot water storage container as described in . (5) The rear end of the heat shielding peripheral wall extends rearward from the back of the sensor holder and serves as a pressing member receiving guide.
A temperature sensor mounting device for an electric hot water storage container according to any one of the preceding paragraphs. (6) The temperature sensor mounting device for an electric hot water storage container according to claim 1, wherein the sensor holder and the heat shielding peripheral wall are connected by a plurality of radial ribs. (7) The temperature sensor mounting device for an electric hot water storage container according to any one of claims 1 to 6 of the utility model registration claim, wherein the pressing member is a spring member. (8) The temperature sensor mounting device for an electric hot water storage container according to any one of claims 1 to 7, wherein the temperature sensor is provided in a portion surrounded by a heater attached to the hot water storage container.