JPS6324628Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat generating device in which a positive characteristic porcelain heating element is brought into close contact with a metal heat sink, which can stably generate a large amount of heat, and which can be easily sealed in a liquid-tight manner.

Conventionally, as shown in FIG. 1, electrode plates 2, 2 are arranged on both sides of a PTC porcelain heating element 1.
Insulating plates 3, 3 are arranged on both outer surfaces of 2, and insulating plates 3,
Heat sinks 4, 4 are arranged on both outer surfaces of 3, and these heat sinks 4, 4 are pressed and fixed with bolts and nuts, and the heat generated by the positive characteristic porcelain heating element 1 is transferred to the heat sinks 4, 4. Heat generating devices for transmitting heat are known.

However, in this heating device, if it is difficult to make the PTC porcelain heating element liquid-tight, or if heat is transferred from only one heat sink 4 to the heated object, the heat from the other heat sink 4 may be transferred to the heated object. They had various drawbacks, such as not being useful for heat radiation and requiring a large number of parts such as bolts and nuts.

The present invention was devised to eliminate such drawbacks of the conventional technology, and consists of a metal heat sink, a rod-shaped or tubular metal body joined to the metal heat-dissipation flat surface to form a screw, and a hole thereof. is inserted into the metal body and has one side pressed into close contact with the metal heat sink, and an electrode surrounding the positive temperature characteristics porcelain heating element and on the other side of the positive temperature characteristics porcelain heating element. a plate, and a dish-shaped heat radiating plate which is pressed tightly through the insulating plate and whose edge is joined to the metal heat radiating plate, and a tightening nut that presses the dish-shaped heat radiating plate is screwed onto a screw of the metal body. The dish-shaped heat sink is liquid-tightly sealed by packing, the disc spring locking part and the disc spring, and the lead wire connected to the electrode plate is passed through the rod-shaped or tubular metal body part. This is a heat generating device that is led out to the outside in a liquid-tight manner.

To explain a specific example of the present invention, the heat generating device of the present invention, as shown in FIG. Holes 7a, 8a,
A disk-shaped positive temperature characteristic ceramic heating element 9, an electrode plate 8, and an insulating plate 7 made of, for example, alumina porcelain are sequentially inserted into the metal tube 14, and a hole is inserted in the center of the metal tube 14. 18a is provided, and the dish-shaped heat sink 18 having an edge 17 joined to the metal heat sink 5 at the peripheral edge is inserted, and the whole is attached to the packing 22, the packing locking part 25, and the disc spring 1.
In this heat generating device, the dish-shaped heat radiating plate 18 is liquid-tightly sealed using threaded portions 11 provided on a metal tube 14 with the metal tube 5 sandwiched therebetween, and then tightened and fixed with a nut 12.

Electricity is supplied between the heat generating device of the present invention and the power source by the electrode plate 8.
The lead wire 16 connected to the metal tube 14 is led out through the hole of the metal tube 14, and the lead wire 16 is connected to a power source.

If the metal heat sink does not need to be electrically insulated, the metal tube 14 welded to the metal heat sink 5
a positive characteristic porcelain heating element 9 with holes provided therein, an electrode plate 8,
This is achieved by sequentially inserting the insulating plates 7.

In order for the heat generated from the positive characteristic porcelain heating element 9 to be efficiently conducted to the heated object, the positive characteristic porcelain heating element 9 must be
It is important that one side of the positive characteristic porcelain heating element 9 is pressed against and in close contact with the metal heat sink 5, but it is also necessary that the other side of the positive characteristic porcelain heating element 9 is also pressed against and in close contact with the dish-shaped heat sink 18. Yes, and 1 dish-shaped heat sink
It is important that the metal heat dissipation plate 8 is well thermally bonded to the metal heat sink plate 5. For this purpose, the dish-shaped heat sink 18
The edges 17 of the two heat sinks may be bonded with adhesive, or may be integrated by spot welding, projection welding, plasma welding, or the like, or the holes provided in both heat sinks may be mechanically fixed using fixing jigs 19, 19. It is preferable to have a structure such as tightening.

In order for the positive characteristic porcelain heating element 9 to be in close contact with the metal heat sink 5 and the disc-shaped heat sink 18, the disc spring 15 is required.
Alternatively, a tightening fixing means such as a spring washer may be used.

The metal body joined to the metal heat sink 5 is not limited to a metal tube, but a rod-shaped metal body 6 as shown in FIG. 5 may also be used. In this case, a packing 22 is provided between the dish-shaped heat sink 18 and the container wall 26,
Insert the packing locking part 25 and the disc spring 15, tighten with the nut 12, and liquid-tightly seal the lead-out part of the rod-shaped metal body 6 and the lead wire 16 between the dish-shaped heat sink 18 and the container wall 26. It shall be.

An insulating spacer 20 made of heat-resistant resin, ceramic, etc. is used to determine the positions of the positive characteristic porcelain heating element 9, the electrode plate 8, and the insulating plate 7, and to ensure electrical insulation.
may be arranged in the space between both heat sinks and the metal tube.

The positive characteristic porcelain heating element incorporated in this heating device is 1
It is not limited to individuals. For example, as shown in FIG. 3, if two PTC porcelain heating elements 9 each having a hole inserted into a metal tube 14 are assembled using an intermediate electrode plate 21 having spring properties, the PTC porcelain heating element Thermal contact between the heat dissipation plates 5 and 18 is improved by tightening the nuts 12.

In addition, the edge 1 of the metal heat sink 5 and the dish-shaped heat sink 18 is
7 are liquid-tightly joined by a method such as projection welding, or by a folding caulking method as shown in FIG. Seal the joint 22
If the metal tube 14 is sealed, the interior surrounded by the heat sinks 5 and 18 will be liquid-tight except for the hole in the metal tube 14. , If the heat generating device is attached to the screw hole 24 provided in the container wall with this screw, this heat generating device becomes
As a liquid-tight heat generating device, it can be used in water or gasoline.

Another structure for making this heat generating device airtight is, for example, as shown in FIG. A packing locking portion 25 is provided around the hole portion of the dish-shaped heat dissipation plate 18 through which the rod-shaped metal body 6 is inserted, and a packing 22 is disposed in the packing locking portion 25, and a threaded portion is attached to the container wall 26. 11
The rod-shaped metal body 6 may be attached to the container wall 26 with a nut 12 in a liquid-tight manner.

Further, as shown in FIG. 5, the rod-shaped metal body 6 is
By cutting out a portion 6a, the lead wire 16 can be led out through the cutout 6a even if it is not tubular.

As the metal heat sink 5, metals such as aluminum, copper, and stainless steel can be used. In addition, the shape of the insulating plate, electrode plate, and PTC porcelain heating element is not limited to a shape with a hole inserted into a rod-shaped or tubular metal body, and the shape of the insulation plate, electrode plate, and positive temperature ceramic heating element is not limited to a shape that is provided with a hole that is inserted into a rod-shaped or tubular metal body. Any flat plate-shaped body that can thermally come into close contact with the heat dissipation body may be used, for example, a plurality of disc-shaped bodies,
It may be in the shape of a square plate, a divided ring plate, or the like.

Furthermore, it goes without saying that metal heat sinks may be subjected to surface treatments such as attaching heat dissipation fins to improve heat transfer to the heat radiating object or applying anti-corrosion paint to the surface of the metal heat sink. be.

In addition, silicone resin, cement, etc. can be embedded in the space between the lead wire led out from the hole in the metal tube or the notch in the metal rod and the hole in the metal tube or the notch in the metal rod, and then the lead wire can be attached to the container. It is also possible to take measures such as preventing liquid from entering the container of the heated heating element from the outside.

As described above, the present invention includes a flat part of a metal heat radiator for good conduction of heat from a positive characteristic porcelain heat generator,
The positive characteristic porcelain heating element is pressed onto the metal heat radiator and brought into close contact with the metal heat radiator, and in certain cases, it serves as a lead wire lead-out part and also as an attachment part to the container. This is a heat generating device made by joining rod-shaped or tubular metal bodies, and since the positive characteristic porcelain heating element can be firmly and closely attached to the metal heat radiating body, it is possible to provide a heat generating device that generates a large amount of heat with low thermal resistance, and also has positive characteristics. A heating device having a structure in which heat from both sides of a characteristic porcelain heating element is transmitted to one of the heat sinks can be easily obtained, and a heating device in which a positive characteristic porcelain heating element is liquid-tightly sealed can also be obtained,
It is industrially useful and can be used as a heater for water heaters, irons, coffee boilers, kerosene vaporizers, gasoline vaporizers, etc.

[Brief description of the drawings]

Fig. 1 is a sectional view of one example of a conventional heating element, Fig. 2 is a sectional view illustrating a specific example of the heat generating device of the present invention, and Fig. 3 is a sectional view of another specific example of the present invention. 4 are cross-sectional views showing one example of the heat sink sealing method for the liquid-tight heat generating device of the present invention, and FIGS. 5A and 5B are cross-sectional views showing still another specific example of the present invention. DESCRIPTION OF SYMBOLS 1... Positive characteristic porcelain heating element, 2... Electrode plate, 3... Insulating plate, 4... Heat sink, 5... Metal heat sink, 6... Rod-shaped metal body, 7... Insulating plate, 8... Electrode plate, 9... Positive characteristic porcelain Heating element, 11... Threaded portion provided on metal body, 12... Nut, 14... Metal tube, 15... Spring, 16... Lead wire, 17... Edge of dish-shaped heat sink, 18... Dishe-shaped heat sink, 19... Stopping jig, 20... Insulating spacer, 21
... intermediate electrode plate having spring properties, 22... packing,
23... Mounting screw, 24... Screw hole provided in the container wall, 25... Packing locking portion, 26... Container wall.

Claims (1)

[Claims for Utility Model Registration] 1. A metal heat dissipation plate 5, a rod-shaped or tubular metal body 6 joined to the metal heat dissipation plane portion and formed with a screw,
14, a positive characteristic porcelain heating element 9 whose hole is inserted into the metal body and one side of which is press-fitted to the metal heat sink 5; An electrode plate is provided on the other side of the heating element, and a dish-shaped heat sink 18 is pressed and adhered through an insulating plate and whose edges are joined to the metal heat sink, and the dish-shaped heat sink is A tightening nut to be pressed is screwed into the screw of the metal body, and the dish-shaped heat sink is liquid-tightly sealed by using the packing 22, the disc spring locking part 25, and the disc spring 15, and is connected to the electrode plate. A heat generating device characterized in that a lead wire 16 is led out through the rod-shaped or tubular metal part in a liquid-tight manner. 2. The heating device according to claim 1 of the utility model registration claim, in which an insulating plate 7 is provided on one or both sides of the positive characteristic porcelain heating element 9. 3 A plurality of positive characteristic porcelain heating elements 9, 9 are stacked with electrode plates 8 in between, and the positive characteristic porcelain heating elements are further pressed against metal heat sink 5 and dish-shaped heat sink 18 through electrode plate 8 and insulating plate 7. The heating device according to claim 1 of the utility model registration claim.