CN216674995U - Portable heater - Google Patents

Abstract

The present invention provides a portable heater comprising: the base shell, the heat conduction panel that is connected with the base shell and forms the holding chamber sets up circuit board, first heating plate and the second heating plate in the holding chamber. A first power interface used for being externally connected with a 110V power supply and a second power interface used for being externally connected with a 12V or 24V power supply are arranged on the base shell, and a first power circuit and a second power circuit are integrated on the circuit board. The first power supply circuit is respectively and electrically connected with the first power supply interface and the first heating plate, and the second power supply circuit is respectively and electrically connected with the second power supply interface and the second heating plate. The first heating sheet and the second heating sheet are both arranged on the surface of the heat conduction panel, and silver layers are arranged on the outer surfaces of the two electrodes of the second heating sheet. By utilizing the silver layer, the working voltage range of the second heating piece is expanded to be compatible with 12V and 24V simultaneously, and the silver layer is matched with 110V voltage, so that the product is suitable for scenes such as trucks, cars and offices, and the applicable scene and the practicability of the heating lunch box are improved.

Description

Portable heater

[ technical field ] A method for producing a semiconductor device

The utility model relates to the technical field of heating equipment, in particular to a portable heater.

[ background of the utility model ]

As is well known, a heating lunch box is a novel lunch box with heat preservation and heating functions. Generally, food-grade PP materials are used as a shell, and a circulating PTC heater is used for heating. The structure is complex, the cost is high, and the carrying is not easy. At present, the heating lunch box sold in the existing market is only suitable for families and offices, and 110V is adopted for power supply; or is suitable for cars and adopts 12V power supply; or is suitable for trucks, and adopts 24V power supply. Therefore, if a user needs to use the heating lunch box in an office, a car or a truck, the user needs to buy various heating lunch boxes with different types, the expenditure is high, and the application range of the existing heating lunch box is narrow, so that the heating lunch box is extremely limited.

Accordingly, the prior art is in need of improvement and development.

[ Utility model ] content

The utility model aims to provide a portable heater, which is used for solving the problem that the existing heating lunch box is only suitable for one scene and has extreme limit.

The technical scheme of the utility model is as follows: a portable heater, comprising: the heat conduction panel is connected with the base shell to form an accommodating cavity, and the circuit board, the first heating sheet and the second heating sheet are arranged in the accommodating cavity; the base shell is provided with a first power interface for externally connecting a 110V power supply and a second power interface for externally connecting a 12V or 24V power supply, the circuit board is integrated with a first power circuit and a second power circuit, and the first power circuit is electrically connected with the first power interface and the first heating plate respectively; the second power supply circuit is respectively electrically connected with the second power supply interface and the second heating sheet, the first heating sheet and the second heating sheet are both arranged on the lower surface of the heat conduction panel, and silver layers are arranged on the outer surfaces of the two electrodes of the second heating sheet.

Furthermore, the number of the first heating sheets is two, and the first heating sheets are arranged at intervals; the number of the second heating sheets is two, and the second heating sheets are arranged at intervals; and the first heating plate is positioned between the two second heating plates.

Further, the first heating plate and the second heating plate are both PCT heating bodies.

Furthermore, the heat conducting panel is made of a heat-resistant ceramic plate.

Furthermore, the heater also comprises a bracket which is locked on the heat conducting panel through screws, and a limiting groove is formed in the position of the bracket corresponding to the first heating sheet and the second heating sheet.

Furthermore, the circuit board is located at the lower part of the bracket and is arranged at intervals with the bracket.

Further, the heater still includes accepts the support, the inside leg that is formed with of base shell, the top arch of leg is formed with the grafting piece, accept and seted up the spliced eye on the support, the spliced eye is arranged in to the grafting piece, first heating plate, second heating plate, bracket and circuit board all are located the leg inboard, the heat conduction panel sets up in accepting the support.

Furthermore, four ends of the base shell protrude outwards to form supporting legs.

The utility model has the beneficial effects that: compared with the prior art, the utility model utilizes the first power interface to access the 110V power supply, and utilizes the first power circuit to convert the 110V power supply into the voltage suitable for the first heating sheet, so as to realize the heating of the first heating sheet. The second power interface is used for accessing a 12V or 24V power supply, the 12V or 24V power supply is converted into stable voltage by the second power circuit to supply power to the second heating plate, and the internal resistance value of the second heating plate is fixed and increases along with the voltage, so that the current output by the second power circuit also increases, and further the thermal damage of the second heating plate can be quickly caused. In addition, the lunch box is simple in structure, and the lunch box can be heated by heat conduction of the heat conduction panel.

[ description of the drawings ]

Fig. 1 is a perspective view of the present invention.

Fig. 2 is an exploded view of the present invention.

Fig. 3 is a cross-sectional view of the present invention.

[ detailed description ] embodiments

The utility model is further described with reference to the following figures and embodiments.

Referring to fig. 1-3, a portable heater according to an embodiment of the present invention is shown.

The portable heater includes: the heat dissipation module comprises a base housing 10, a heat conduction panel 90 connected with the base housing 10 and forming a containing cavity 11, and a circuit board 40, a first heating sheet 70 and a second heating sheet 80 arranged in the containing cavity 11. The base housing 10 is provided with a first power interface 20 for externally connecting a 110V power supply and a second power interface 30 for externally connecting a 12V or 24V power supply, and the circuit board 40 is integrated with a first power circuit (not shown) and a second power circuit (not shown). The first power circuit is electrically connected to the first power interface 20 and the first heater chip 70, respectively, and the second power circuit is electrically connected to the second power interface 30 and the second heater chip 80, respectively. The first heating sheet 70 and the second heating sheet 80 are both disposed on the lower surface of the heat conductive panel 90, and the outer surfaces of both electrodes of the second heating sheet 80 are provided with silver layers (not shown).

The first power interface 20 is connected to a 110V power supply, and the first power circuit is used for converting the 110V power supply into a voltage suitable for the first heating sheet 70, so that the first heating sheet 70 generates heat. The second power interface 30 is used for connecting a 12V or 24V power supply, and the second power circuit is used for converting the 12V or 24V power supply into stable voltage to supply power to the second heating plate 80, because the internal resistance value of the second heating plate 80 is fixed, the current output by the second power circuit can also increase along with the increase of the voltage, and further the thermal damage of the second heating plate 80 can be quickly caused, therefore, silver is plated on the electrode connected with the second heating plate 80 to reduce the internal resistance of the second heating plate 80, so that the working voltage range of the second heating plate 80 can be expanded to be compatible with 12V and 24V at the same time under the condition of ensuring the service life of a product, and the application scene and the practicability of the heating lunch box are improved. In addition, the lunch box is simple in structure, and the lunch box can be heated through heat conduction of the heat conduction panel 90.

Specifically, the first heating plate 70 and the second heating plate 80 are both PCT heating elements, and the heat conducting panel 90 is made of a heat-resistant ceramic plate.

In one embodiment, the number of the first heat-generating sheets 70 is two, and the first heat-generating sheets are spaced apart from each other. The number of the second heating sheets 80 is two, and they are arranged at intervals. One of the first heat patches 70 is positioned between two of the second heat patches 80. That is, the two first heat patches 70 and the two second heat patches 80 are alternately arranged to increase the heating area.

In one embodiment, the heater further includes a bracket 60 screwed to the heat conductive panel 90, a limiting groove 62 is formed at a position of the bracket 60 corresponding to the first heating plate 70 and the second heating plate 80, and the first heating plate 70 and the second heating plate 80 can be attached to the heat conductive panel 90 by limiting the first heating plate 70 and the second heating plate 80 by the limiting groove 62.

In one embodiment, the circuit board 40 is located at a lower portion of the bracket 60 and spaced apart from the bracket 60 to prevent the first and second heat sheets 70 and 80 from generating heat to affect the circuit board 40.

In an embodiment, the heater further includes a receiving bracket 50, a surrounding wall 12 is formed inside the base housing 10, a plug block 13 is formed at the top of the surrounding wall 12 in a protruding manner, a plug hole 51 is formed on the receiving bracket 50, the plug block 13 is disposed in the plug hole 51, the first heating plate 70, the second heating plate 80, the bracket 60 and the circuit board 40 are all located inside the surrounding wall 12, and the heat conducting panel 90 is disposed inside the receiving bracket 50. The receiving bracket 50 is spaced from the bottom of the base housing 10 by the surrounding wall 12, and the heat conducting panel 90 can be easily installed by the receiving bracket 50, and the compactness of the present invention can be improved.

In one embodiment, the four ends of the base housing 10 protrude outward to form the supporting legs 14, and the supporting legs 14 are used to separate the base housing 10 from the placement surface, thereby facilitating heat dissipation from the bottom and preventing the first heating plate 70 and the second heating plate 80 from generating heat to affect the placement surface.

In addition, the base housing 10 may further include a switch button (not shown) electrically connected to the circuit board 40 for user operation.

While the foregoing is directed to embodiments of the present invention, it will be understood by those skilled in the art that various changes may be made without departing from the spirit and scope of the utility model.

Claims (8)

1. A portable heater, comprising: the heat conduction panel is connected with the base shell to form an accommodating cavity, and the circuit board, the first heating sheet and the second heating sheet are arranged in the accommodating cavity; the base shell is provided with a first power interface for externally connecting a 110V power supply and a second power interface for externally connecting a 12V or 24V power supply, the circuit board is integrated with a first power circuit and a second power circuit, and the first power circuit is electrically connected with the first power interface and the first heating plate respectively; the second power supply circuit is respectively electrically connected with the second power supply interface and the second heating sheet, the first heating sheet and the second heating sheet are both arranged on the lower surface of the heat conduction panel, and silver layers are arranged on the outer surfaces of the two electrodes of the second heating sheet.

2. The portable heater of claim 1, wherein the number of the first heating sheets is two, and the first heating sheets are arranged at intervals; the number of the second heating sheets is two, and the second heating sheets are arranged at intervals; and the first heating plate is positioned between the two second heating plates.

3. The portable heater of claim 2, wherein said first heater chip and said second heater chip are each a PCT heater.

4. A portable heater according to claim 3, wherein said heat conducting panel is made of a refractory ceramic plate.

5. The portable heater of claim 4, further comprising a bracket screwed to the heat conductive panel, the bracket having a limiting groove formed at a position corresponding to the first and second heating sheets.

6. A portable heater according to claim 5, wherein the circuit board is located beneath the cradle and spaced from the cradle.

7. The portable heater of claim 6, further comprising a receiving bracket, wherein a surrounding wall is formed inside the base housing, an insertion block is formed on the top of the surrounding wall in a protruding manner, the receiving bracket is provided with an insertion hole, the insertion block is arranged in the insertion hole, the first heating plate, the second heating plate, the bracket and the circuit board are all located inside the surrounding wall, and the heat conducting panel is arranged inside the receiving bracket.

8. The portable heater of claim 7, wherein the four ends of the base housing project outwardly to form support feet.

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