Positive temperature coefficient (PTC) heater device with insulated medium and shell

Abstract

The utility model provides a PTC (Positive Temperature Coefficient) heater device with a medium insulated from a shell, which relates to the field of water heating type PTC heaters and comprises an upper cover plate, a water channel shell, an upper cover sealing plate and a plug connector, the device solves the problem that in the prior art, an outer shell is insufficient in insulativity and cannot be effectively insulated. The upper cover plate of the device is made of plastic materials. Rubber sleeves are arranged in the connecting holes of the upper cover plate and the skirt edge of the water channel shell for sealing and insulating connection; an insulation pad heat insulation foam and a shunting piece are additionally arranged between the heating core body and the control panel in the shell; the problem that proton exchange of a fuel cell is affected by electrification of cooling liquid in a water channel of a hydrogen fuel cell system can be effectively avoided, meanwhile, a sealing gasket is arranged between the base and the water channel shell to form a water channel cavity, the water channel shell is made of plastic and is not conductive, effective insulation between the device and a medium can be achieved, and the service life of the hydrogen fuel cell is prolonged; and the safety of the battery system is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of water-heating type PTC heaters, in particular to a PTC heater device with dielectric and shell insulation. Background Art

[0002] During the operation of the fuel cell, the increase in conductivity will cause the ion filter to fail prematurely. The increase in coolant conductivity will affect the proton exchange of the fuel cell, reduce the life of the battery, and reduce the insulation of the system. Since the coolant in the hydrogen fuel cell system is charged, the voltage may even reach more than 300V, which may easily cause safety hazards. Therefore, various fuel cell companies have required effective insulation between the medium and the shell.

[0003] Conventional solutions using a metal base cannot directly achieve insulation between the medium and the shell in terms of structure, and can only reduce the ion precipitation of the product by high-temperature washing of the metal shell; however, this method cannot fully meet the insulation requirements between the medium and the shell. Utility Model Content

[0004] In order to solve the problem that the insulation of the shell in the prior art is insufficient and cannot be effectively insulated, the utility model provides a PTC heater device with dielectric and shell insulation, comprising an upper cover plate, a water channel shell, an upper cover sealing plate and a connector; the upper cover plate is sealed and connected to the water channel shell; the upper cover sealing plate is arranged on the top of the upper cover plate; the water channel shell is provided with two medium exchange channels; the medium exchange channel is cylindrical and penetrates the water channel shell; the connector is sealed and arranged on the side of the upper cover plate and is parallel to the medium exchange channel; the water channel shell is provided with a base, a sealing assembly, a heating core, a control board, an insulating member and a diverter; the heating core is pressed and fixed in the base; the base is installed in the water channel shell; the periphery of the base is sealed and connected to the upper cover plate and the water channel shell through the sealing assembly; the control board is arranged on the upper layer of the base; the insulating member is arranged between the control board and the base; the diverter is arranged between the insulating member and the base.

[0005] The utility model provides a PTC heater device with dielectric and shell insulation. Preferably, at least one plug hole is provided on the base; the plug holes are arranged in a matrix; the heating core includes at least one heating chip; a heating chip is plugged into a plug hole and tightly connected.

[0006] The utility model provides a PTC heater device with dielectric and shell insulation. Preferably, the sealing component includes a No. 1 sealing gasket and a No. 2 sealing gasket; the No. 1 sealing gasket and the No. 2 sealing gasket are ring-shaped; the No. 2 sealing gasket is arranged between the water channel shell and the base; grooves are arranged around the base frame for fixing the No. 1 sealing gasket.

[0007] The utility model provides a PTC heater device with a medium insulated from a shell. Preferably, the diverter comprises a diverter plate and a diverter support plate; the diverter support plate is arranged on the upper layer of the heating core; the diverter support plate is provided with at least one heat dissipation hole to facilitate the heat dissipation of the heating core; the diverter plate is installed on the diverter support plate.

[0008] The utility model provides a PTC heater device with dielectric and shell insulation. Preferably, a control system and an IGBT module are arranged on a control board; a mounting plate is arranged between a connector and an upper cover plate; the mounting plate and the upper cover plate are sealed and connected via a sealing gasket; a No. 1 bolt and a No. 2 bolt are arranged on the mounting board; the No. 2 bolt interface is inwardly connected to the grounding wire of the control system toward the inside of the device; and the No. 1 bolt interface is outwardly connected to the connector and to the grounding port of an external circuit system.

[0009] The utility model provides a PTC heater device with dielectric and shell insulation. Preferably, the connector includes a low-voltage connector and a high-voltage connector; a through hole is provided on the mounting plate; the low-voltage connector passes through the through hole on the mounting plate and is connected to the upper cover plate; the high-voltage connector is plugged into the upper cover plate; and a No. 1 bolt is located between the low-voltage connector and the high-voltage connector.

[0010] The utility model provides a PTC heater device with dielectric and shell insulation. Preferably, the insulating member comprises an insulating pad and thermal insulation foam; the insulating pad is arranged under the control board; and the thermal insulation foam is arranged between the insulating pad and the diverter plate.

[0011] The utility model provides a PTC heater device with dielectric and shell insulation, preferably comprising screws and rubber rings; the upper cover plate, the base and the water channel shell frame are all provided with connecting holes; the rubber ring is sleeved in the connecting hole; the screws pass through the connecting hole and the rubber ring to insulate and fix the upper cover plate, the base and the water channel shell.

[0012] The utility model provides a PTC heater device with dielectric and shell insulation, comprising an upper cover plate, a water channel shell, an upper cover sealing plate and a connector; the problem of insufficient insulation of the shell in the prior art that effective insulation is impossible is solved, and the upper cover plate of the device provided by the utility model is made of plastic material; rubber sleeves are arranged in the connecting holes of the upper cover plate and the skirt of the water channel shell to seal the insulating connection; insulating pads, heat-insulating foam and shunt parts are added between the heating core and the control board inside the shell; the problem of the proton exchange of the fuel cell being affected by the charged coolant in the water channel of the hydrogen fuel cell system can be effectively avoided, and a sealing gasket is arranged between the base and the water channel shell to form a water channel cavity; the water channel shell is made of plastic material and is not conductive, which can achieve effective insulation between the device and the medium, increase the service life of the hydrogen fuel cell, and greatly improve the safety of the battery system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural diagram of a PTC heater device with dielectric and shell insulation provided by the utility model;

[0014] Figure 2 It is an exploded view of a PTC heater device with dielectric and shell insulation provided by the utility model;

[0015] Figure 3 This is a structural diagram of a mounting plate of a PTC heater device with dielectric and shell insulation provided by the utility model;

[0016] Numbers in the figure: cover plate 1, water channel shell 2, upper cover sealing plate 3, high-voltage connector 4, low-voltage connector 5, control system 6, insulating pad 7, thermal insulation foam 8, diverter plate 9, diverter support plate 10, No. 1 sealing gasket 11, base 12, No. 2 sealing gasket 13, screw 14, control board 15, sealing gasket 16, mounting plate 17, rubber ring 18, heating core 19, No. 1 bolt 20, No. 2 bolt 21. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

[0018] In the description of the present invention, it should be understood that the terms "left side", "right side", "upper part", "lower part", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second", etc. do not indicate the importance of the components, and therefore cannot be understood as a limitation on the present invention. The specific dimensions used in this embodiment are only for illustrating the technical solution, and do not limit the scope of protection of the present invention.

[0019] Embodiment 1:

[0020] like Figures 1 to 3As shown, the utility model discloses a PTC heater device with dielectric insulation from shell, comprising an upper cover plate 1, a waterway shell 2, an upper cover sealing plate 3 and a connector; the upper cover plate 1 is sealed and connected to the waterway shell 2; the upper cover sealing plate 3 is arranged on the top of the upper cover plate 1; the waterway shell 2 is provided with two dielectric exchange channels; the dielectric exchange channel is cylindrical and penetrates the waterway shell 2; the connector is sealed and arranged on the side of the upper cover plate 1 and is parallel to the dielectric exchange channel; the waterway shell 2 is provided with a base 12, a sealing assembly, a heating core 19, a control board 15, an insulating member and a diverter; the heating core 19 is pressed and fixed in the base 12; the base 12 is installed in the waterway shell 2; the periphery of the base 12 is sealed and connected to the upper cover plate 1 and the waterway shell 2 through the sealing assembly; the control board 15 is arranged on the upper layer of the base 12; the insulating member is arranged between the control board 15 and the base 12; the diverter is arranged between the insulating member and the base 12.

[0021] More specifically, at least one plug hole is provided on the base 12; the plug holes are arranged in a matrix; the heating core 19 is composed of a plurality of heating chips; one heating chip is plugged into one plug hole and tightly connected; several heating chips are plugged into the plug holes and arranged in a matrix.

[0022] More specifically, the sealing assembly includes a No. 1 sealing gasket 11 and a No. 2 sealing gasket 13; the No. 1 sealing gasket 11 and the No. 2 sealing gasket 13 are ring-shaped; the No. 2 sealing gasket 13 is arranged between the waterway shell 2 and the base 12; the waterway shell 2 is a recessed pool-shaped shell, and the thickness of the base 12 is less than the depth of the pool body part of the waterway shell 2. The No. 2 sealing ring 13 is used to seal the skirt part of the waterway shell 2 to the base 12, so that a waterway cavity is formed in the gap between the waterway shell 2 and the base 12, and grooves are arranged around the frame of the base 12 for fixing the No. 1 sealing gasket 11; the No. 1 sealing gasket 11 is used for sealing and fixing between the base 12 and the upper cover plate 1.

[0023] More specifically, the diverter component includes a diverter plate 9 and a diverter support plate 10; the diverter support plate 10 is arranged on the upper layer of the heating core 19; the diverter support plate 10 is provided with at least one heat dissipation hole to facilitate the heat dissipation of the heating core 19; the diverter plate 9 is installed on the diverter support plate 10.

[0024] More specifically, the control board 15 is provided with a control system 6 and an IGBT module; the control system 6 is electrically connected to the IGBT module; a mounting plate 17 is provided between the connector and the upper cover plate 1; the mounting plate 17 and the upper cover plate 1 are sealed and connected via a sealing gasket 16; a No. 1 bolt 20 and a No. 2 bolt 21 are provided on the mounting plate 17; the interface of the No. 2 bolt 21 is inwardly connected to the inside of the device and connected to the ground wire of the control system 6; the interface of the No. 1 bolt 20 is outwardly connected to the ground port of the external circuit system with the connector.

[0025] More specifically, the connector includes a low-voltage connector 5 and a high-voltage connector 4; a through hole is provided on the mounting plate 17; the low-voltage connector 5 passes through the through hole on the mounting plate 17 and is connected to the upper cover plate 1; the high-voltage connector 4 is plugged into the upper cover plate 1; and the No. 1 bolt 20 is located between the low-voltage connector 5 and the high-voltage connector 4.

[0026] More specifically, the insulating member includes an insulating pad 7 and a thermal insulation foam 8 ; the insulating pad 7 is disposed under the control board 15 ; and the thermal insulation foam 8 is disposed between the insulating pad 7 and the diverter plate 9 .

[0027] More specifically, it includes screws 14 and rubber rings 18; the upper cover plate 1, the base 12 and the frame of the water channel shell 2 are all provided with connection holes; the rubber ring 18 is sleeved in the connection hole; the screws 14 pass through the connection hole and the rubber ring 18 to insulate and fix the upper cover plate 1, the base 12 and the water channel shell 2.

[0028] Working principle:

[0029] The heating core 19 is pressed tightly into the base 12, and the No. 2 sealing gasket 13 is assembled with the base 12 and then placed into the water channel housing 2 to form a water channel cavity. The medium-charged water channel housing 2 is made of plastic and is non-conductive. The shunt support plate 10 is installed on the base 12, and the shunt plate 9 and the heating core 19 are installed and connected by welding. The insulation foam 8 is placed on the shunt plate 9, and the insulation pad 7 is placed on the insulation foam 8. The control system 6 is set on the insulation pad 7 and fixed to the base 12, and the IGBT module is installed on the control board 15; the control board 15 is set on the base 12, and the sealing gasket 16 is installed with the upper cover plate 1 , the mounting plate 17 and the upper cover plate 1 are sealed and installed through the sealing gasket 16, the high-voltage connector 4 and the low-voltage connector 5 are assembled with the upper cover plate 1, the grounding wire of the control system 6 is connected to the No. 2 bolt 21, and the No. 1 bolt 20 is the installation point of the external system grounding wire to meet the product grounding requirements, the rubber sleeve 18 is installed with the through hole of the base 12, the upper cover plate 1 and the waterway shell 2 are sealed and fixed by screws 14 passing through the rubber sleeve 18, the upper cover sealing plate 3 and the upper cover plate 1 are sealed with glue, the upper cover plate 1 is made of plastic material and is not conductive, covering the entire base 12, so as to achieve effective insulation between the product medium and the upper cover plate 1 and the waterway shell 2.

[0030] In summary, the utility model provides a PTC heater device with dielectric insulation from a shell, comprising an upper cover, a water channel shell, an upper cover sealing plate and a connector; the problem in the prior art that the shell is not sufficiently insulating and cannot be effectively insulated is solved, and the upper cover of the device provided by the utility model is made of plastic; rubber sleeves are provided in the connection holes of the upper cover and the skirt of the water channel shell to seal the insulating connection; insulating pads, heat-insulating foam and shunts are added between the heating core and the control board inside the shell; the problem of the hydrogen fuel cell system water channel being affected by the charged coolant affecting the proton exchange of the fuel cell can be effectively avoided, and a sealing gasket is provided between the base and the water channel shell to form a water channel cavity; the water channel shell is made of plastic material and is not conductive, which can achieve effective insulation between the device and the medium, increase the service life of the hydrogen fuel cell, and greatly improve the safety of the battery system.

[0031] Although the content of the utility model has been described in detail through the above preferred embodiments, it should be recognized that the above description should not be considered as a limitation of the utility model. After reading the above content, various modifications and substitutions of the utility model will be obvious to those skilled in the art. Within the technical concept of the utility model, the technical solution of the utility model can be subjected to various equivalent transformations, and these equivalent transformations all belong to the protection scope of the utility model.

Claims

1. A PTC heater device with dielectric and housing insulation, characterized in that: The water channel housing (2) comprises an upper cover plate (1), a water channel housing (2), an upper cover sealing plate (3) and a connector; the upper cover plate (1) is sealedly connected to the water channel housing (2); the upper cover sealing plate (3) is arranged on the top of the upper cover plate (1); the water channel housing (2) is provided with two medium exchange channels; the medium exchange channels are cylindrical and penetrate the water channel housing (2); the connector is seal-arranged on the side of the upper cover plate (1) and is parallel to the medium exchange channels; the water channel housing (2) is provided with a base (12), a sealing component, a heating core ( 19), a control board (15), an insulating member and a diverter member; the heating core (19) is pressed and fixed in the base (12); the base (12) is installed in the water channel shell (2); the periphery of the base (12) is sealed and connected to the upper cover plate (1) and the water channel shell (2) through the sealing component; the control board (15) is arranged on the upper layer of the base (12); the insulating member is arranged between the control board (15) and the base (12); and the diverter member is arranged between the insulating member and the base (12).

2. A PTC heater device with dielectric insulation from housing as claimed in claim 1, characterized in that: The base (12) is provided with at least one plug hole; the plug holes are arranged in a matrix; the heating core (19) comprises at least one heating chip; one heating chip is plugged into one of the plug holes for tight connection.

3. A PTC heater device with dielectric insulation from housing as claimed in claim 1, characterized in that: The sealing assembly comprises a No. 1 sealing gasket (11) and a No. 2 sealing gasket (13); the No. 1 sealing gasket (11) and the No. 2 sealing gasket (13) are annular; the No. 2 sealing gasket (13) is arranged between the water channel housing (2) and the base (12); and grooves are arranged around the frame of the base (12) for fixing the No. 1 sealing gasket (11).

4. A PTC heater device with dielectric insulation from housing as claimed in claim 1, characterized in that: The flow divider comprises a flow divider plate (9) and a flow divider support plate (10); the flow divider support plate (10) is arranged on the upper layer of the heating core (19); the flow divider support plate (10) is provided with at least one heat dissipation hole to facilitate heat dissipation of the heating core (19); the flow divider plate (9) is mounted on the flow divider support plate (10).

5. A PTC heater device with dielectric insulation from housing as claimed in claim 1, characterized in that: The control panel (15) is provided with a control system (6) and an IGBT module; a mounting plate (17) is provided between the connector and the upper cover plate (1); the mounting plate (17) and the upper cover plate (1) are sealed and connected via a sealing gasket (16); a No. 1 bolt (20) and a No. 2 bolt (21) are provided on the mounting plate (17); an interface of the No. 2 bolt (21) faces inward toward the inside of the device and is connected to a grounding wire of the control system (6); an interface of the No. 1 bolt (20) faces outward and is connected to a grounding port of an external circuit system with the connector.

6. A PTC heater device with dielectric insulation from housing as claimed in claim 5, characterized in that: The connector comprises a low-voltage connector (5) and a high-voltage connector (4); the mounting plate (17) is provided with a through hole; the low-voltage connector (5) passes through the through hole on the mounting plate (17) to be connected to the upper cover plate (1); the high-voltage connector (4) is plugged into the upper cover plate (1); and the No. 1 bolt (20) is located between the low-voltage connector (5) and the high-voltage connector (4).

7. A PTC heater device with dielectric insulation from housing as claimed in claim 4, characterized in that: The insulating member comprises an insulating pad (7) and a heat-insulating foam (8); the insulating pad (7) is arranged below the control board (15); and the heat-insulating foam (8) is arranged between the insulating pad (7) and the diverter plate (9).

8. A PTC heater device with dielectric insulation from housing as claimed in claim 1, characterized in that: The invention comprises screws (14) and rubber rings (18); the upper cover plate (1), the base (12) and the frame of the water channel housing (2) are all provided with connection holes; the rubber ring (18) is sleeved in the connection hole; the screws (14) pass through the connection hole and the rubber ring (18) to insulate and fix the upper cover plate (1), the base (12) and the water channel housing (2).

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