WO2019146675A1

WO2019146675A1 - Insulated waterproof vehicle-mounted heater having high withstand voltage, vehicle-mounted heater unit, vehicle-mounted heater device, method for manufacturing vehicle-mounted heater unit, and insulated waterproof heater

Info

Publication number: WO2019146675A1
Application number: PCT/JP2019/002208
Authority: WO
Inventors: 浩四郎田口; 渡邊　浩
Original assignee: カシン工業株式会社
Priority date: 2018-01-25
Filing date: 2019-01-24
Publication date: 2019-08-01
Also published as: JP6627058B2; JPWO2019146675A1

Abstract

Provided is an insulated waterproof vehicle heater 1 having high withstand voltage which can be adapted to a severe environment without using a complicated configuration. The insulated waterproof vehicle type heater 1 having high withstand voltage comprises: a heating element 10 provided with an electrode layer 10a on the front and back; a pair of electrode portions 20 (a first electrode portion 201, a second electrode portion 202) sandwiching the heating element 10 therebetween; an insulating sheet 30 covering the periphery of the pair of electrode portions 20; a cylindrical body 50 for housing a heat generating structure 100 in a hollow portion 55; a sealing portion 60 for sealing openings 50a at both ends of the cylindrical body 50; and a pair of caps 70 to be fitted into both ends of the cylindrical body 50. A first terminal portion 221 of the first electrode portion 201 and a second terminal portion 222 of the second electrode portion 202 are provided on one opening 50a side of the cylindrical body 50, and are disposed at mutually offset positions. The sealing portion 60 is provided to embed the first terminal portion 212 and the second terminal portion 222, and is provided to be interposed between the insulating sheet 30 and the inner surface 50c of the cylindrical body 50.

Description

High withstand voltage insulated and waterproof vehicle-mounted heater, vehicle-mounted heater unit, vehicle-mounted heater device, method of manufacturing vehicle-mounted heater unit and insulation waterproof heater

The present invention relates to a high withstand voltage insulated and waterproof vehicle-mounted heater, a vehicle-mounted heater unit, a method of manufacturing the vehicle-mounted heater unit, and an insulated and waterproof heater, more specifically, a vehicle-mounted heater using a heating element generating heat by voltage application. The present invention relates to an on-vehicle heater, an on-vehicle heater unit, an on-vehicle heater device, a method for manufacturing the on-vehicle heater unit, and an insulation waterproof heater, which have high voltage resistance, high efficiency and high waterproof characteristics.

An on-vehicle heater using a heating element that generates heat by application of a voltage is used as an aid when the heat of the engine can not be used for in-vehicle heating, such as immediately after the start of the engine. For example, a PTC (Positive Temperature Coefficient) element is used as a heating element of the on-vehicle heater. The PTC element has positive temperature characteristics, which can facilitate temperature control and suppress power consumption.

The inventor of the present invention proposes an insulation waterproof type heater disclosed in Patent Document 1 as a heater excellent in insulation and waterproofness. This insulation waterproof type heater comprises a pair of electrode members sandwiching the heating element, an insulation sheet which wraps the heating element and the pair of electrode members, a cylindrical body for accommodating them, and a cap which closes both ends of the cylindrical body. And a sealing material for closing both ends of the hollow portion of the cylindrical body.

Furthermore, the inventor of the present invention proposes an on-vehicle heater disclosed in Patent Document 2. The on-vehicle heater includes a pair of electrode members sandwiching the heat generating element, an insulation sheet that wraps the heat generating element and the pair of electrode members, a cylindrical body that accommodates these, and a radiator unit including at least fins. . In this on-vehicle heater, the insulating sheet is sandwiched between the electrode surface of the heat generating element and the back surface of the heat dissipation surface of the cylindrical body, and both end edges of the insulating sheet overlap substantially parallel to the side surface of the heat generating element. Configured

Patent No. 4388519 Patent No. 4455473

In recent years, electric vehicles and hybrid vehicles using a motor as a power source have been actively developed. With the electrification of automobiles, the demand for on-board heaters utilizing heating elements, such as PTC elements, that generate heat due to voltage application will increase. Along with this, the specifications required for the on-vehicle heater become stricter.

For example, the voltage of a motor used in an electric car or a hybrid car is about 300 volts (V) to 400 V, and a voltage much higher than the voltage of 12 V or 24 V handled in a conventional car will be handled. In-vehicle heaters also need to cope with such high voltages. In addition, even electric vehicles need to be designed to withstand use in severe environments such as cold places and bad roads.

In recent years, since sudden weather changes such as sudden thunderstorms may occur, in-vehicle heaters using heat generating elements operate in such a way that they can not be compared with conventional ones such as submersion in a high voltage environment, tsunami, or high tide. It is desirable to clear the conditions.

On the other hand, if the configuration is complicated to adopt a configuration that can withstand severe environments, manufacturing may be difficult and cost may increase. Therefore, we would like to simplify the device configuration as much as possible. In particular, in the method of attaching fins for heat radiation to a vehicle heater, brazing of metals is preferable from the viewpoint of heat conduction, but the problem is that the insulating sheet covering the heat generating element can not withstand the heat of brazing. . In view of such a situation, the inventor of the present application is promoting further increase in withstand voltage, increase in waterproof property, downsizing and improvement in efficiency of the insulation waterproof type heater previously proposed.

The present invention is a high withstand voltage insulated and waterproof type vehicle which is high in voltage resistance and excellent in insulation and waterproofness, small in size and high in efficiency, and capable of responding to a severe environment without adopting a complicated configuration. It is an object of the present invention to provide a heater, an on-vehicle heater unit, a method of manufacturing the on-vehicle heater unit, and an insulated and waterproof heater.

In one embodiment of the present invention, a heating element having an electrode layer provided on the front and back, a pair of electrode parts electrically connected to each of the front and back electrode layers, and a pair of electrode parts. A cylinder having an insulating sheet, a hollow portion, and a heat generating structure including a heat generating element, a pair of electrodes and an insulating sheet, housed in the hollow portion, and a seal for sealing the openings at both ends of the cylinder A high-withstand voltage insulated and waterproof vehicle-mounted heater comprising: a stop; and a pair of caps each having a recess and each end of the cylinder fitted in the recess to close the hollow portion.

The first electrode portion, which is one of the pair of electrode portions, has a first plate-like portion connected to be conductive with one of the front and back electrode layers, and one opening of the cylinder in the first plate-like portion And a first terminal portion provided at the end of the side.
In addition, the second electrode portion, which is the other of the pair of electrode portions, is one of a second plate-like portion connected to be conductive with the other of the front and back electrode layers, and one of the cylinders in the second plate-like portion. And a second terminal portion provided at an end of the opening.

Here, the direction in which the heating element is held between the pair of electrode portions is orthogonal to the first direction and the first direction, and the direction in which the cylinder extends is orthogonal to the second direction, the first direction, and the second direction. Let the direction be the third direction.

When viewed in the first direction, the first terminal portion and the second terminal portion are disposed at mutually offset positions. In addition, the sealing portion for sealing one opening of the cylinder is provided so as to embed the first terminal portion and the second terminal portion surrounded by the insulating sheet, and a gap between the insulating sheet and the inner surface of the cylinder. Provided to intervene.
In addition, the pair of electrode portions are accommodated in the hollow portion of the cylindrical body sealed by the cap and the sealing portion, and are not exposed outside the cylindrical body.

According to such a configuration, since the first terminal portion and the second terminal portion are arranged at mutually shifted positions in the first direction, compared to the case where the two terminal portions are arranged overlapping each other. The distance can be increased, and the withstand voltage can be increased.

In addition, in one opening of the cylindrical body where the first terminal portion and the second terminal portion are located, the sealing portion is provided so as to embed the first terminal portion and the second terminal portion, thereby preventing The voltage can be increased. And since a sealing part intervenes also in a crevice between an insulating sheet and the inner surface of a cylinder, waterproofness in a crevice between an inner surface of a cylinder and an insulating sheet is also securable.

In the high withstand voltage insulated waterproof vehicle type heater described above, the sealing portion constitutes a waterproof structure to the inside of the cylinder and a withstand voltage structure of 300 V or more between the first terminal portion and the second terminal portion. May be The sealing portion may be made of a material having heat resistance of 150 ° C. or more.

In the high withstand voltage insulated and waterproof vehicle-mounted heater, the first terminal portion has a first crimped portion, the second terminal portion has a second crimped portion, and the first electrode portion is a first plate portion and A second convexly extended portion provided between the second plate-like portion and the second crimped portion, having a first convexly extended portion provided between the first crimped portion and the second crimped portion. It may have an outlet part.
And the length of the 2nd direction in the 1st convex-like extension part is longer than the length of the 2nd direction of the caulking weir of the 1st convex-like extension part side in the 1st caulking part, and the 2nd convex-like shape extension The length in the second direction in the outlet portion may be longer than the length in the second direction of the caulking weir on the second convex extending portion side in the second caulking portion.

According to the configuration as described above, since the length in the second direction of the convex extending portion is longer than the length in the second direction of the crimped ridge formed in the crimped portion, the influence of the crimped ridge is a plate-like portion It does not reach. That is, the influence of the waviness of the plate-like portion due to the caulking can be suppressed to make contact with the electrode layer of the heating element.

In the high withstand voltage insulated and waterproof vehicle-mounted heater, the length in the third direction of the first convex extending portion may be longer than the length in the third direction of the first caulking portion. In addition, the length in the third direction of the second protruding extension portion may be longer than the length in the third direction of the second crimped portion. Thereby, when stress is applied to the caulking portion, it is possible to suppress the stress from being absorbed by the convex extending portion and to transmit the stress to the plate-like portion.

In the high withstand voltage insulated and waterproof vehicle-mounted heater, the length in the third direction of the first convex extension portion is shorter than half of the length in the third direction of the first plate-like portion; The length of the convex extending portion in the third direction is shorter than 1⁄2 of the length of the second plate-like portion in the third direction, and the first convex extending portion and the second convex portion are viewed in the first direction. The convex extending portions may be arranged so as not to overlap each other. As a result, the distance between the two convex extending portions can be made longer than when two convex extending portions are arranged in an overlapping manner, and the withstand voltage can be increased.

In the high withstand voltage insulated waterproof vehicle-mounted heater, the thickness of the heat generating element may be 3 millimeters (mm) or more. By setting the thickness of the heat generating element to 3 mm or more, it is possible to cope with application of a voltage of, for example, 300 V or more between the pair of electrodes.

In the high withstand voltage insulated and waterproof type vehicle heater, the gap between the first terminal portion and the second terminal portion in the first direction may be 2.5 mm or more. Thereby, insulation can be ensured even if a voltage of, for example, 300 V or more is applied between the first terminal portion and the second terminal portion.

In the high withstand voltage insulated waterproof vehicle-mounted heater, the length in the third direction of the first plate-like portion and the length in the third direction of the second plate-like portion are longer than the length in the third direction of the electrode layer It may be long and not longer than the length in the third direction of the heating element. Thereby, when pressing a cylinder and pinching a heat-generation structure, the bending of the edge of a 1st plate-like part and a 2nd plate-like part is suppressed.

In the high withstand voltage insulated and waterproof type vehicle heater, the length in the second direction of the first plate-like portion and the length in the second direction of the second plate-like portion may be 20 mm or more and 30 mm or less. Thereby, sufficient heat generation output can be obtained.

In the high withstand voltage insulated waterproof vehicle-mounted heater, both ends of the winding of the insulating sheet may overlap each other at the side surface portion of the heat generating element. As a result, the insulating sheets do not overlap on the back surface of the heat dissipation surface of the cylindrical body, and a reduction in heat transfer efficiency is suppressed.

In the high withstand voltage insulated and waterproof vehicle-mounted heater, the heating element may be a PTC element. Thus, easy temperature control and low power consumption can be achieved by utilizing the positive temperature characteristics of the PTC element.

In the high withstand voltage insulated and waterproof vehicle-mounted heater, the sealing portion may be a silicone resin. Thereby, the opening of the cylindrical body can be easily sealed.

One aspect of the present invention is an on-vehicle heater unit including the above-described high withstand voltage insulated and waterproof in-vehicle heater and a fin attached to a heat dissipation surface of a cylindrical body via a brazing portion. The heat radiation efficiency is improved by the fins being attached to the heat radiation surface of the cylindrical body via the brazing part.

In one embodiment of the present invention, a heating element having an electrode layer provided on the front and back, a pair of electrode parts electrically connected to each of the front and back electrode layers, and a pair of electrode parts. A cylindrical body for housing a heat generating structure having an insulating sheet, a hollow portion and a heat radiating surface, and a heating element, a pair of electrode portions and an insulating sheet, and sealing the openings at both ends of the cylindrical body It is a vehicle-mounted heater unit provided with the sealing part to stop, and the fin attached to the thermal radiation surface of a cylinder via the brazing part. As described above, the fins are attached to the heat dissipating surface through the brazed portion, so that the vehicle-mounted heater unit having improved heat dissipating efficiency can be configured.

In the vehicle-mounted heater unit, it is preferable that the load resistance in the thickness direction of the fins is larger than the load resistance in the thickness direction of the cylinder. Thereby, even when pressure is applied through the fins, the fins can be prevented from being crushed. The on-vehicle heater unit may further include a protrusion provided on the side surface of the cylinder, and the length in the thickness direction of the protrusion may be longer than the length in the thickness direction of the cylinder. . Thus, the side surface of the fin can be covered by the projecting portion, and the influence of the outside air temperature is less likely to be transmitted to the fin.

One aspect of the present invention is an on-vehicle heater device including a case having the above-described on-vehicle heater unit, a medium inlet, and a medium outlet. The on-vehicle heater unit is housed in the case with one end of the flow path of the fin facing the inlet and the outlet. Further, in the vehicle heater unit, one end of the flow path of the fin is opposed to the inflow port, and the other end of the flow path of the fin is opposed to the outflow port to be housed between the inflow port and the outflow port in the case. It may be done. As a result, the medium flowing from the inlet into the case can be efficiently flowed to the flow path of the fins to improve the heat exchange efficiency. Here, the medium is at least one of water, air, gas, oil and gel.

In the on-vehicle heater device, the case is provided with a first hole for passing a first conducting cable conducting to the first electrode and a second hole for passing a second conducting cable conducting to the second electrode. The sealant may be embedded in each of the gap between the first hole and the first conductive cable and the gap between the second hole and the second conductive cable. As a result, the case only needs to be provided with a small hole through which the conduction cable passes, and the case can be easily sealed, and the case can be improved in sealing performance.

One aspect of the present invention is a process of brazing a fin to a heat dissipation surface of a cylindrical body having a hollow portion and a heat dissipation surface, a process of sandwiching a heating element provided with an electrode layer on the front and back with a pair of electrode parts, Covering the periphery of the electrode portion with an insulating sheet, and storing the heat generating element, the heat generating structure including the pair of electrode portions and the insulating sheet, in the hollow portion of the cylindrical body to which the fin is brazed; And fixing the heat generating structure in the hollow portion by pressing the cylindrical body through the fins to crush the cylindrical body, and the method of manufacturing the on-vehicle heater unit. According to such a manufacturing method, even in the manufacturing method in which the heat generating structure is fixed in the hollow portion by crushing the cylindrical body, the fins can be attached to the heat dissipation surface by brazing.

One embodiment of the present invention is a heating element having an electrode layer provided on the front and back, a pair of electrode parts electrically connected to each of the front and back electrode layers, a heating element, and a pair of electrode parts. A cylindrical body for housing the heat generating member configured, and an insulating powder which is filled inside the cylindrical body to electrically insulate the cylindrical body and the heat generating member, and a seal for sealing at least one open end of the cylindrical body It is an insulation waterproof type heater provided with a stop and a pair of conducting cables which are respectively conducted to a pair of electrode parts and are pulled out of the cylindrical body through the sealing body.

According to such a configuration, the insulating powder is embedded in the gap between the inner surface of the cylindrical body and the heat generating member, so that the heat generating member can be electrically insulated and positioning of the heat generating member inside the cylindrical portion is performed. Can.

In the insulating waterproof type heater described above, the first electrode portion, which is one of the pair of electrode portions, has a first plate-like portion in electrical contact with the electrode layer and one of the cylinders in the first plate-like portion. A second plate-like portion having a first terminal portion provided at an end portion on the opening side, the second electrode portion being the other of the pair of electrode portions being in electrical contact with the electrode layer; A second terminal portion provided at the end of one opening side of the cylindrical body in the second plate-like portion; a direction in which the heating element is held between the pair of electrode portions is a first direction; The first terminal portion and the second terminal viewed in the first direction, assuming that the direction in which the cylinder extends is the second direction and the direction orthogonal to the first direction and the second direction is the third direction. The parts may be disposed at mutually offset positions. According to such a configuration, the distance between the two terminal portions can be made longer than when two terminal portions are arranged in an overlapping manner, and the withstand voltage can be increased.

In the above insulation and waterproof heater, the cylinder may be cylindrical and the heat generating member may be plate-like. Thereby, manufacture of an insulation waterproof type heater becomes easy, and it can aim at cost reduction. Further, the circumferential surface, which is the outer surface of the cylindrical body, serves as a heat dissipation surface, so that heat can be uniformly transmitted to the surroundings. Also, the material of the cylinder may be stainless steel. Thereby, water resistance and chemical resistance can be improved.

According to the present invention, it is possible to provide an on-vehicle heater, an on-vehicle heater unit, a method for manufacturing the on-vehicle heater unit, and an insulation waterproof heater, which can cope with a severe environment without adopting a complicated configuration. Becomes possible.

It is a perspective view which illustrates the composition of the heater for vehicles concerning this embodiment. It is an exploded perspective view which illustrates the composition of the heater for vehicles concerning this embodiment. FIG. 2 is a cross-sectional view illustrating the configuration of the on-vehicle heater according to the embodiment; (A) to (c) are cross-sectional views illustrating the configuration of the on-vehicle heater according to the present embodiment. It is an enlarged plan view illustrated about the convex extension part of an electrode part. It is an enlarged plan view illustrated about a terminal portion of an electrode part. It is a perspective view explaining an application example. It is a flowchart which illustrates the manufacturing method of a heater unit for vehicles. It is a perspective view which illustrates the vehicle-mounted heater unit provided with the fin of multiple stages. (A) And (b) is a figure explaining another application example. It is a perspective view which illustrates the vehicle-mounted heater unit used for a vehicle-mounted heater apparatus. It is a perspective view which illustrates a vehicle-mounted heater device. (A) And (b) is sectional drawing which illustrates a vehicle-mounted heater apparatus. FIG. 7 is a perspective view illustrating another on-vehicle heater device. It is a schematic diagram which shows the application example of a vehicle-mounted heater apparatus. It is a schematic diagram which shows the other application example of a vehicle-mounted heater apparatus. It is a schematic diagram of a heat pump system. It is a schematic diagram of a heat pump system. It is a disassembled perspective view which shows the structural example of the vehicle-mounted heater apparatus applied to a heat pump system. (A) And (b) is a figure which illustrates the insulation waterproof type heater concerning this embodiment. FIG. 6 is an exploded perspective view illustrating the heat generating member. It is a perspective view which shows the application example of an insulation waterproof type heater.

Hereinafter, embodiments of the present invention will be described based on the drawings. In the following description, the same members are denoted by the same reference numerals, and the description of the members once described will be omitted as appropriate.

(Configuration of high withstand voltage insulated waterproof vehicle heater)
FIG. 1 is a perspective view illustrating the configuration of a high-voltage insulated and waterproof vehicle-mounted heater (hereinafter, also simply referred to as “vehicle-mounted heater”) according to the present embodiment.
FIG. 2 is an exploded perspective view illustrating the configuration of the on-vehicle heater according to the present embodiment.
The on-vehicle heater 1 according to the present embodiment is a device that generates heat by voltage application. In particular, the on-vehicle heater 1 can be driven with a high voltage of 300 volts (V) or more, and has high waterproofness and dust resistance to clear IP67 in the IP code (IEC: International Electrotechnical Commission).
IP67 means that it has a dustproof performance that prevents dust from entering the inside of the device, and a waterproof performance that does not cause water immersion to the inside even if it is temporarily submerged under a constant water pressure condition.

As shown in FIGS. 1 and 2, the on-vehicle heater 1 according to this embodiment includes a heating element 10, a pair of electrode portions 20 sandwiching the heating element 10, an insulating sheet 30, a cylinder 50, and sealing. A portion 60 and a pair of caps 70 are provided.
In the present embodiment, for convenience of explanation, the direction in which the heating element 10 is held between the pair of electrode portions 20 is the first direction D1, and the direction in which the cylindrical body 50 extends orthogonal to the first direction is the second direction. A direction perpendicular to the D2, the first direction D1, and the second direction D2 is referred to as a third direction D3. The first direction D1 is also referred to as a thickness direction, the second direction D2 as a length direction, and the third direction D3 as a width direction.

The heating element 10 is an element that generates heat by application of a voltage. For example, a PTC (Positive Temperature Coefficient) element is used as the heating element 10. The PTC element has positive temperature characteristics. That is, when the temperature is higher than the Curie point, the resistance increases, and the temperature rise beyond that is limited. By using a PTC element as the heating element 10, the ease of temperature control and suppression of power consumption can be achieved.

The positive temperature characteristics of the PTC element are changed by adding a trace amount of rare earth or the like to barium titanate (BaTiO ₃ ). In the present embodiment, a plurality of heating elements 10 are provided. One heating element 10 is a substantially rectangular parallelepiped having a thickness of about 3 millimeters (mm), a width of about 24 mm, and a length of about 15 mm.

In the on-vehicle heater 1 according to the present embodiment, the composition, the shape, and the size for driving at a high voltage of about 300 V or more are applied as the heating element 10. Further, in the on-vehicle heater 1 according to the present embodiment, a plurality of heating elements 10 of the above-described size are provided in the second direction D2 in order to achieve a high output of about 500 watts (W) or more and save space. , Are arranged in series.

An electrode layer 10 a is provided on each of the front and back surfaces (front and back surfaces in the thickness direction) of the heater element 10. A metal such as silver (Ag) or aluminum (Al) is used for the electrode layer 10a. The electrode layer 10 a is formed by, for example, thermal spraying these metals on the front and back surfaces of the heater element 10. The electrode layer 10 a is in ohmic contact with the heating element 10.

The heating element 10 is held between the pair of electrode units 20. One of the pair of electrode units 20 is the first electrode unit 201, and the other is the second electrode unit 202. For convenience of description, when the first electrode unit 201 and the second electrode unit 202 are shown without distinction, they will be referred to as the electrode unit 20. The first electrode portion 201 is electrically connected to one of the electrode layers 10 a of the heating element 10, and the second electrode portion 202 is electrically connected to the other electrode layer 10 a of the heating element 10.

The first electrode portion 201 has a first plate-like portion 211, a first terminal portion 221, and a first convex extension portion 231. The second electrode portion 202 has a second plate-like portion 212, a second terminal portion 222, and a second convexly extending portion 232. Also, the first terminal portion 221 has a first crimped portion 251, and the second terminal portion 222 has a second crimped portion 252.

For convenience of explanation, when the first plate-like portion 211 and the second plate-like portion 212 are shown without distinction, they will be referred to as the plate-like portion 210. Further, when the first terminal portion 221 and the second terminal portion 222 are shown without distinction, they are referred to as the terminal portion 220. Moreover, when showing the 1st convex-shaped extension part 231 and the 2nd convex-shaped extension part 232 indifferently, it shall be called the convex-shaped extension part 230. FIG. Also, when the first crimped portion 251 and the second crimped portion 252 are shown without distinction, they will be referred to as crimped portions 250.

The plate-like portion 210 is a thin plate-like portion extending in the second direction D2, and is in electrical contact with the electrode layer 10a. The length in the third direction D3 of the plate-like portion 210 may be approximately 20 mm or more and 30 mm or less. Thereby, sufficient heat generation output can be obtained. The terminal portion 220 is provided at an end of the plate-like portion 210 on the side of one opening 50 a of the cylinder 50. The first conductive cable C11 is fixed to the first caulking portion 251 by caulking, and the second conductive cable C12 is fixed to the second caulking portion 252 by caulking.

For convenience of explanation, when the first conductive cable C11 and the second conductive cable C12 are shown without distinction, they will be referred to as the conductive cable C10. The conducting cable C10 is one in which the periphery of the conducting wire is covered with an insulating covering material. Conductors exposed from the insulation coating at the end of the conductive cable C10 are connected by caulking at caulking portion 250. Further, it is desirable that the front end portion of the insulating covering material is also fixed by caulking at the caulking portion 250. The caulking connection can be more easily and reliably connected than soldering, brazing or screwing.

The convex extension portion 230 is provided between the plate-like portion 210 and the caulking portion 250. The convexly extending portion 230 is a portion protruding from the end of the plate-like portion 210 on the side of the opening 50a in the second direction D2 in a convex manner toward the opening 50a. A caulking portion 250 extends from the tip of the convex extending portion 230 in the second direction D2.

For example, stainless steel or aluminum (Al) is used for the electrode unit 20. The thickness of the plate-like portion 210 is about 0.2 mm or more and 0.5 mm or less. The plate-like portion 210 and the electrode layer 10 a of the heat-generating element 10 are bonded by, for example, a silicone-based adhesive excellent in conductivity and thermal conductivity. In addition, on the surface of the electrode layer 10a, minute unevenness corresponding to the unevenness of the surface of the heat generating element 10 is formed. Therefore, even if the conductivity of the adhesive is low, the minute convex and concave portions of the electrode layer 10a penetrate the adhesive and contact the plate-like portion 210, whereby sufficient conduction can be obtained.

The insulating sheet 30 is an insulating sheet material that covers the periphery of the pair of electrode units 20. That is, the insulating sheet 30 is provided so as to wrap around the pair of electrode portions 20 having the plurality of heat generating elements 10 sandwiched therebetween. As a material of the insulating sheet 30, it has flexibility, heat conductivity, and electrical insulation, and, for example, a polyimide film having a thickness of about 0.05 mm is preferable. The whole of the plate-like portion 210, the terminal portion 220 and the convex extension portion 230 is covered by the insulating sheet 30. Both ends of the insulating sheet 30 in the second direction D2 are open.

The cylindrical body 50 has a hollow portion 55, and accommodates the heat generating structure 100 including the heat generating element 10, the pair of electrode portions 20 and the insulating sheet 30 in the hollow portion 55. The cylindrical body 50 has a cylindrical shape in which an internal space is formed by the pair of heat radiation surfaces 51 and the pair of side surfaces 53 and which extends in the second direction D2. The heat dissipation surface 51 is a flat surface.

The cylindrical body 50 is provided with an opening 50a on one end side and an opening 50b on the other end side. The heat generating structure 100 is inserted into, for example, an opening 50 a of the cylinder 50 into the cylinder. The cylindrical body 50 is made of, for example, aluminum (Al), and is pressurized in the first direction D1 in a state where the heat generating structure 100 is accommodated in the hollow portion 55. By this pressure, the side surfaces 53 are bent and crushed. The groove 53a may be provided in the second direction D2 in advance on the side surface 53. Thereby, the side surface 53 can be prevented from being bent inward at the portion of the groove 53a and protruding outward.

The cylindrical body 50 is crushed in the first direction D1 by pressurization, so that the heat generating structure 100 is sandwiched by the inner surfaces of the upper and lower heat radiation surfaces 51. Thereafter, the adhesive between the electrode unit 20 and the heating element 10 is cured. As a result, the pair of electrode portions 20 is in a state of being in electrical continuity with the electrode layer 10a, and the heating element 10 is firmly held between the pair of electrode portions 20.

Here, it is desirable that the width (the length in the third direction D3) of the plate-like portion 210 of the electrode portion 20 be wider than the width of the electrode layer 11 and smaller than or equal to the width of the heating element 10. When the width of the plate-like portion 210 is wider than the width of the electrode layer 11, the entire electrode layer 11 can be in contact with the plate-like portion 210. On the other hand, by making the width of the plate-like portion 210 equal to or less than the width of the heat-generating element 10, the edge portion in the width direction of the plate-like portion 210 does not protrude outside the heat-generating element 10.

When the edge portion of the plate-like portion 210 protrudes outside the heat generating element 10, when the heat generating structure 100 is inserted into the cylindrical body 50 and pressurized, pressure may be applied to the protruding portion to cause bending. is there. Due to this curvature, the distance between the electrodes at the side surface portion of the heat generating element 10 becomes narrow, which may cause a decrease in withstand voltage.
By making the width of the plate-like portion 210 equal to or less than the width of the heat-generating element 10 as in this embodiment, deformation of the edge portion of the plate-like portion 210 at the time of pressurization is suppressed, and withstand voltage is ensured by securing the distance between the electrodes. It is possible to suppress the decrease.

The sealing portion 60 is a member that seals the

openings

50 a and 50 b at both ends of the cylindrical body 50. For the sealing portion 60, for example, a sealing material of withstand voltage and heat resistance type such as silicone resin or epoxy resin is used. Further, as the sealing portion 60, a rubber material such as silicone rubber may be inserted into the opening 50a, and the sealing property may be enhanced by crushing the cylindrical body 50. Thus, the

openings

50a and 50b of the cylindrical body 50 can be easily sealed. That is, after the silicone resin in a soft state before curing is filled into the

openings

50a and 50b and then cured, the inside of the cylindrical body 50 can be sealed in a liquid tight state easily and reliably.

In the present embodiment, the sealing portion 60 forms a waterproof structure to the inside of the cylindrical body 50 and a withstand voltage structure of 300 V or more between the first terminal portion 221 and the second terminal portion 222. Moreover, as the sealing part 60, it is preferable to use the material of 150 degreeC or more of heat-resistant temperature.

Caps 70 are attached to both ends of the cylindrical body 50, respectively. The cap 70 has electrical insulation and heat resistance to the heat generated by the heating element 10. The cap 70 is made of, for example, polybutylene terephthalate (PBT). The cap 70 has a recess 70 a into which the end of the cylinder 50 is fitted. At the bottom of the recess 70 a of the cap 70 fitted to the end of one side of the cylindrical body 50, two through holes 70 h communicating the inside and the outside of the recess 70 a are formed.

The cap 70 is fixed by the sealing material. Specifically, for example, a silicone-based sealing material having heat resistance and electrical insulation is put in the recess 70 a of the cap 70, and then the end of the cylindrical body 50 is fitted in the recess 70 a. Then, the cap 70 and the cylindrical body 50 are fixed by curing the sealing material. The sealing material may be the same material as the sealing portion 60.

The conduction cable C10 is passed through the two through holes 70h. The continuity cable C10 is pulled out of the cap 70 through the through hole 70h and connected to an external circuit (not shown).

The sealing material is also injected into the through hole 70h through which the conductive cable C10 is passed, and a portion thereof protrudes from the through hole 70h to the outside of the cap 70, and covers and cures the gap between the conductive cable C10 and the through hole 70h. .

A similar cap 70 is provided at the other end of the cylindrical body 50, but no through hole 70h is formed in the cap 70. Thus, the hollow portion 55 of the cylindrical body 50 is liquid-tightly shut from the outside by the cap 70 and the sealing portion 60.

(Electrode part and sealing part)
3 and 4 (a) to 4 (c) are cross-sectional views illustrating the configuration of the on-vehicle heater according to the present embodiment. FIG. 3 shows a cross-sectional view of the on-vehicle heater 1 as viewed in the first direction D1. In addition, in FIG. 3, the cross section which cut | disconnected the insulating sheet 30, the cylinder 50, and the sealing part 60 in the center of thickness direction is shown for convenience of explanation. 4 (a) shows a cross-sectional view taken along the line AA of FIG. 3, FIG. 4 (b) shows a cross-sectional view taken along the line BB of FIG. 3, and FIG. 4 (c) shows it. Is a cross-sectional view taken along the line CC of FIG.

As shown in FIG. 3, the first terminal portion 221 and the second terminal portion 222 are located on one side of the opening 50 a of the cylindrical body 50. Thereby, the first conductive cable C11 and the second conductive cable C12 can be pulled out from the terminal portion 220 substantially straight from the same opening 50a side.

In addition, when viewed in the first direction D1, the first terminal portion 221 and the second terminal portion 222 are disposed at mutually offset positions. The shifted position means that the center of the width of the first terminal portion 221 and the center of the width of the second terminal portion 222 do not overlap. When viewed in the first direction D1, the first terminal portion 221 and the second terminal portion 222 may partially overlap each other, but it is preferable that they do not overlap at all. As a result, the distance between the two terminal portions can be made longer as compared to the case where two terminal portions are arranged in an overlapping manner, and the withstand voltage (dielectric strength) between the first terminal portion 221 and the second terminal portion 222 can be increased. Can.

As shown to Fig.4 (a), the insulating sheet 30 has covered so that the outer side of a pair of electrode part 20 which clamps the heat generating element 10 may be enclosed. In addition, as shown in FIG. 3, the insulating sheet 30 covers the entire electrode portion 20 (plate-like portion 210, convex extension portion 230 and terminal portion 220) in the second direction D2. The

end portions

30 a and 30 b of the insulating sheet 30 in the second direction D 2 do not protrude outward beyond both ends of the cylindrical body 50.

When winding the insulating sheet 30, it is preferable that the both ends of the winding overlap each other at the side surface portion of the heat generating element 10. Thus, the insulating sheet 30 does not overlap on the inner surface of the heat dissipation surface 51, and heat can be efficiently transmitted from the heat generating element 10 to the heat dissipation surface 51.

Further, as shown in FIG. 4 (b), the abutments of the caulking portions 250 are provided to face each other. As a result, the caulking portion 250 does not protrude to the inner surface side of the cylindrical body 50 in the first direction D1. That is, the heat dissipation surface 51 side of the electrode portion 20 is substantially flat from the plate-like portion 210 to the convex extension portion 230 and the caulking portion 250, and the inner surface of the heat dissipation surface 51 presses the electrode portion 20 uniformly. Moreover, thickness reduction of the vehicle heater 1 can be achieved.

In addition, the sealing portion 60 is embedded in the

openings

50 a and 50 b of the cylindrical body 50. The entire opening 50 b is closed by the sealing portion 60 on the opening 50 b side of the cylindrical body 50. At the opening 50 a side of the cylindrical body 50, the sealing portion 60 is embedded from the opening 50 a to at least the terminal portion 220 inside the cylindrical body 50.

As shown in FIG. 4C, on the opening 50a side, the first conductive cable C11 and the second conductive cable C12 pierce through the sealing portion 60 and extend outward through the through holes 70h of the cap 70. On the side of the opening 50a, the sealing portion 60 is in close contact with the inner surface 50c of the cylindrical body 50 and also in close contact with the cap 70 and the insulating covering material of the conductive cable C10.

Further, as shown in FIG. 3 and FIG. 4B, on the side of the opening 50a, the sealing portion 60 is provided so as to embed the first terminal portion 221 and the second terminal portion 222 surrounded by the insulating sheet 30. . Since the terminal portion 220 is embedded by the sealing portion 60, the position fixing of the first terminal portion 221 and the second terminal portion 222 is ensured.

In addition, since the sealing portion 60 is interposed between the first terminal portion 221 and the second terminal portion 222, it is more resistant than when the space between the first terminal portion 221 and the second terminal portion 222 is a space. The voltage can be increased. By using a silicone-based resin as the sealing portion 60, a dielectric strength higher by two digits or more than that of a space (air) can be obtained.

Furthermore, as shown in FIG. 4B, the sealing portion 60 also intervenes in the gap G between the insulating sheet 30 and the inner surface 50c of the cylindrical body 50 on the opening 50a side. Here, the insulating sheet 30 extends to a position covering the entire terminal portion 220 on the opening 50 a side. This is to avoid conduction between the terminal portion 220 housed in the cylindrical body 50 and the inner surface 50 c of the cylindrical body 50.

There is a distance between the insulating sheet 30 extending to the terminal portion 220 and the terminal portion 220, and it is hollow before the sealing portion 60 is embedded. Therefore, there is no support inside the insulating sheet 30, and a slight gap G is generated between the insulating sheet 30 and the inner surface 50c of the cylindrical body 50. Furthermore, a gap G is also generated between the bent portion of the insulating sheet 30 and the corner of the inner surface 50 c of the cylindrical body 50. The sealing portion 60 is provided to fill the gap G.

By interposing the sealing portion 60 in the gap G, the waterproofness in the gap G between the insulating sheet 30 and the inner surface 50 c of the cylindrical body 50 on the opening 50 a side is enhanced. That is, the waterproofness from the outside of the cylindrical body 50 toward the inside of the cylinder becomes higher as the length of the sealing portion 60 that blocks the inflow path of moisture (water) is longer. If the sealing portion 60 does not intervene in the gap G, the length of the sealing portion 60 on the permeation path of moisture (moisture) along the inner surface 50c of the cylindrical body 50 is from the opening 50a to the insulating sheet It becomes to the edge part 30a of 30 (refer length L11 of FIG. 3).

On the other hand, when the sealing portion 60 intervenes in the gap G, the length of the sealing portion 60 on the permeation path of moisture (moisture) along the inner surface 50c of the cylindrical body 50 is the length L11 and insulation The length (see length L12 in FIG. 3) of the portion surrounding the terminal portion 220 of the sexing sheet 30 is added. The length L12 of the portion surrounding the terminal portion 220 of the insulating sheet 30 is sufficiently longer than the length L11 from the opening 50a to the end 30a of the insulating sheet 30. Since the gap G is generated in the portion of the length L12, by filling the gap G with the sealing portion 60, the length of the sealing portion 60 for closing the permeation path of moisture (moisture) can be increased, and the waterproofness is improved. It can be effectively enhanced.

Although the sealing portion 60 may be embedded in part of the range of the length L2 in the gap G, the longer the length in the second direction D2 of the sealing portion 60 in which the gap G is embedded, the higher the waterproofness. Therefore, it is most preferable to bury the sealing portion 60 in the entire range of the length L2 in the gap G.

In the above example, the sealing portion 60 on the opening 50a side is shown, but it is preferable that the sealing portion 60 intervenes in the gap between the insulating sheet 30 and the inner surface 50c of the cylindrical body 50 also on the opening 50b side .

(Convex extension)
FIG. 5 is an enlarged plan view illustrating a convexly extending portion of the electrode portion.
The convex extending portion 230 is a portion extending in a convex shape in the second direction D2 from the end of the plate-like portion 210. The caulking portion 250 is provided to extend from the tip of the convex extension portion 230. That is, the convex extension portion 230 is a portion provided between the plate-like portion 210 and the caulking portion 250.

Here, when the caulking portion 250 is formed by sheet metal processing, caulking flaws 255 are generated. The caulking weir 255 refers to a portion where the metal plate material is plastically deformed in the shape of a weir by the force applied near the base of the caulking piece 250a when the caulking piece 250a is bent in the formation of the caulking portion 250.

In the present embodiment, the crimped ridge 255 is formed on the crimped portion 250 side of the convex extension portion 230. The caulking weir 255 is formed to be raised on the bending side of the caulking piece 250a, that is, on the welding side of the caulking. For this reason, by providing the caulking portion 250, the caulking weir 255 is formed, and the thickness increases by the amount of swelling by the caulking weir 255.

In the present embodiment, the length L2 of the convex extending portion 230 in the second direction D2 is longer than the length L1 of the second direction D2 of the crimp rod 255. As a result, even if the crimped ridge 255 is formed, the influence of the rise by the crimped ridge 255 does not affect the plate-like portion 210.

Therefore, even if the caulking portion 250 is formed, the influence of the undulation of the plate-like portion 210 can be suppressed. When the plate-like portion 210 has less waviness, the plate-like portion 210 and the electrode layer 10 a can be reliably brought into contact when the heating element 10 is held between the pair of electrode portions 20.

If the convex extension portion 230 is not provided or the length L2 of the convex extension portion 230 is shorter than the length L1 of the caulking ridge 255, the influence of the swelling by the caulking ridge 255 causes the plate portion 210 It will In this case, the flatness of the plate-like portion 210 is impaired, which prevents uniform contact between the plate-like portion 210 and the heating element 10 (electrode layer 10 a). If the cylinder 50 is pressurized in this state to bring the electrode unit 20 and the heating element 10 into close contact with each other, a variation in stress of pressurization occurs between the electrode unit 20 and the heating element 10.

Irregularities are formed on the surface of the electrode layer 10 a based on the irregularities of the surface of the heat generating element 10, and the contact between the electrode layer 10 a and the plate-like portion 210 is considered to be a collection of point contacts. When the electrode portion 20 and the electrode layer 10a are in close contact with each other, the contact area between the plate-like portion 210 and the electrode layer 10a per unit area in the first direction D1 is taken as the contact density.

When the stress of pressure is concentrated on the portion of the swelling due to the caulking flange 255, a decrease or variation in the contact density occurs in the contact region between the electrode portion 20 and the electrode layer 10a. A decrease in contact density leads to a decrease in heat dissipation efficiency. Further, the variation in the contact density is the variation in the electric field between the electrode unit 20 and the heating element 10. When the voltage applied to the electrode unit 20 is a high voltage of 300 V or more, the withstand voltage of the heat generating element 10 is affected by the electric field concentration due to the variation of the electric field. In particular, when a PTC element is used as the heating element 10, an inrush current is generated at the beginning of energization. When a high voltage of 300 V or more is applied, it is desirable to avoid the occurrence of an excessive inrush current locally.

In order to avoid the influence of the caulking wedge 255 on the plate-like portion 210, it is conceivable to dispose the heating element 10 in the plate-like portion 210 so as to avoid the swelled portion of the caulking weir 255. However, in this case, it is necessary to lengthen the plate portion 210 or to shorten the heating element 10 by the amount to be avoided.

As in the present embodiment, by setting the length L2 of the convex extended portion 230 to be longer than the length L1 of the crimped ridge 255, the plate-like portion 210 is not affected by the crimped ridge 255. Therefore, while being able to arrange heating element 10 over the whole region of plate-like portion 210, variation in electric field distribution is suppressed without being affected by the rise of caulking wedge 255, and sufficient withstand voltage is obtained even when a high voltage is applied. It becomes possible. Moreover, it becomes possible to aim at the improvement of heat dissipation efficiency by the increase in the contact density of the electrode part 20 and the electrode layer 10a.

Further, the length (width W2) of the convex extension portion 230 in the third direction D3 is longer than the length (width W3) of the third direction D3 of the caulking portion 250. That is, the convex extension portion 230 is provided wider than the caulking portion 250. Thereby, when stress is applied to the caulking portion 250, it is possible to suppress the stress from being absorbed by the convex extension portion 230 and transfer to the plate-like portion 210. The width of the convex extension portion 230 may be constant or may be gradually increased (continuously or stepwisely) from the caulking portion 250 to the plate-like portion 210.

Further, the length (width W2) of the convex extension 230 in the third direction D3 is more than half (width W1) of the length (width W1) of the third direction D3 in the plate-like portion 210. It may be provided short. The convex extending portion 230 is provided at a position closer to one side with respect to the center of the plate-like portion 210. Thus, the first convex extending portion 231 and the second convex extending portion 232 are arranged so as not to overlap with each other in the first direction D1. Therefore, the distance between the first convexly extending portion 231 and the second convexly extending portion 232 is longer than when the first convexly extending portion 231 and the second convexly extending portion 232 overlap with each other. And the withstand voltage can be improved.

(Terminal part)
FIG. 6 is an enlarged plan view illustrating the terminal portion of the electrode unit.
In the present embodiment, the first terminal portion 221 and the second terminal portion 222 are arranged so as not to overlap with each other in the first direction D1. Under the present circumstances, it is preferable that clearance gap S1 of the 1st terminal area 221 and the 2nd terminal area 222 is 2.5 mm or more seeing in the 1st direction D1. The sealing portion 60 is interposed between the first terminal portion 221 and the second terminal portion 222, and the gap S1 is 2.5 mm or more, for example, between the first terminal portion 221 and the second terminal portion 222, for example Even if a voltage of 300 V or more is applied, sufficient insulation can be ensured.

(Example of application)
FIG. 7 is a perspective view for explaining an application example.
The on-vehicle heater 1 according to the present embodiment can be applied to an on-vehicle heater unit 1U. The on-vehicle heater unit 1U has fins 150 provided on the upper and lower heat radiation surfaces 51 of the on-vehicle heater 1, respectively. Note that, for the convenience of description, in FIG. 7, the upper fins 150 are shown separated from the on-vehicle heater 1.

The width W4 of the in-vehicle heater unit 1U is substantially equal to the width of the in-vehicle heater 1 according to the present embodiment. When air passes from one side to the other side in the width direction of the in-vehicle heater unit 1U, the air is heated by the in-vehicle heater 1, and warm air can be output.
By using the on-vehicle heater 1 according to the present embodiment, it is possible to exhibit high withstand voltage, excellent insulation and waterproofness also for the on-vehicle heater unit 1U.

The fins 150 are formed by bending a plate made of, for example, aluminum (Al) so as to repeat a peak and a valley. The fins 150 may be connected by means of, for example, a silicone-based adhesive excellent in heat resistance and thermal conductivity, but it is preferable that the fins 150 be brazed and fixed to the heat dissipation surface 51 via the brazing portion 80. The outer side of the fin 150 is covered by a cover plate 151 such as aluminum (Al). Here, in the case of brazing, it is not necessary to provide the cover plate 151 on the in-vehicle heater 1 side of the fin 150. This is because, in the case of brazing, the ridges of the fins 150 and the brazing portion 80 can be directly and firmly connected. On the other hand, in the case of using a silicone-based adhesive, the cover plate 151 is provided on the side of the heater 150 of the fin 150 to widen the contact surface, and the surface of the cover plate 151 and the heat radiation surface 51 are silicone-based. Bonded by an adhesive.

Since the fins 150 are brazed to the heat dissipation surface 51, the heat dissipation efficiency between the heat dissipation surface 51 and the fins 150 is improved as compared with the case where they are bonded with a resin such as a silicone adhesive. That is, the thermal conductivity of metal is orders of magnitude higher than the thermal conductivity of resin. Therefore, since the fins 150 are brazed to the heat dissipation surface 51, miniaturization can be achieved if the heater unit has the same output, and high output can be achieved if the heater unit has the same size. . Further, in the case of brazing, since it is not necessary to provide the cover plate 151 on the in-vehicle heater 1 side of the fin 150, the fin structure can be simplified and cost can be reduced.

Here, when the fins 150 are brazed to the heat radiation surface 51, the following manufacturing method is used.
FIG. 8 is a flowchart illustrating the method of manufacturing the on-vehicle heater unit.
First, the fin 150 is fixed to the heat dissipation surface 51 of the cylindrical body 50 by brazing (step S101). For example, a eutectic alloy of aluminum (Al) -silicon (Si) is used as the brazing material of the brazing portion 80.

Next, the heating element 10 is sandwiched between the pair of electrode units 20 (step S102). For example, a silicone-based adhesive excellent in conductivity and thermal conductivity is applied between the heating element 10 and the electrode portion 20.

Next, the periphery of the pair of electrode units 20 holding the heating element 10 is covered with the insulating sheet 30 (step S103). A polyimide film is used for the insulating sheet 30. The whole of the electrode unit 20 is covered with the insulating sheet 30. When winding the insulating sheet 30 around the electrode portion 20, it is preferable that both ends of the winding overlap with each other at the side surface portion of the heating element 10.

Next, the heat generating structure 100 covered with the insulating sheet 30 is accommodated in the hollow portion 55 of the cylindrical body 50 (step S104). At this time, the fins 150 have already been attached to the heat dissipation surface 51 of the cylindrical body 50 by brazing.

Next, the cylinder 50 in which the heat generating structure 100 is accommodated is pressurized (step S105). The pressurization of the cylindrical body 50 is performed via the fins 150. That is, the cylinder 50 is pressurized in the vertical direction (first direction D1) via the fins 150 to crush the cylinder 50 and fix the heat generating structure 100 in the hollow portion 55.

When the cylindrical body 50 is crushed, the side surface 53 is bent inward at the portion of the groove 53a. When the cylindrical body 50 is crushed, the electrode portion 20 and the heating element 10 are in close contact with each other, and the plate-like portion 210 of the electrode portion 20 and the electrode layer 11 of the heating element 10 are electrically connected. Thus, the on-vehicle heater unit 1U is completed.

In the above manufacturing method, the fins 150 are attached to the cylindrical body 50 before the cylindrical body 50 is pressurized. Then, the heat generating structure 100 is accommodated in the hollow portion 55 of the cylindrical body 50 to which the fins 150 are attached, and thereafter, the cylindrical body 50 is pressurized via the fins 150.
That is, when attaching the fin 150 to the cylindrical body 50, the insulating property of the heating structure 100 is attached when attaching the fin 150 because the heating structure 100 is not accommodated in the hollow portion 55 (empty state). It is possible to adopt brazing that exceeds the heat resistance temperature of the sheet 30.

In order to realize the above manufacturing method, the load resistance in the first direction D1 of the fin 150 is made larger than the load resistance in the first direction D1 of the cylindrical body 50. Thereby, when the cylinder 50 is pressurized via the fins 150, the fins 150 can be prevented from being crushed before the cylinder 50 is crushed.

The inventor of the present invention has repeatedly made ingenuity in order to solve the problem when trying to braze the fin 150.
That is, when attaching the fin 150 to the cylinder 50, it is desirable to fix by brazing instead of a silicone type adhesive (resin) from the viewpoint of heat radiation efficiency. However, when the insulating sheet 30 (polyimide) which wraps the electrode section 20 is used to make it insulating and waterproof, the polyimide can not withstand the brazing temperature (about 600 ° C.) (the heat resistance temperature of the polyimide is 280 ° C.) degree).

On the other hand, it is also conceivable to braze the fins 150 to the cylinder 50 in advance, but in this case, the cylinder 50 is pressurized via the fins 150, and the pressure or pressure causes the fins 150 to be crushed or deformed. It may occur. For this reason, after pressing and squeezing the cylindrical body 50, it was necessary to connect the fin 150 with an adhesive that can be adhered at a temperature lower than the heat resistance temperature of the insulating sheet 30 (polyimide).

As described above, it has been considered that it is difficult to simultaneously secure the insulation property by the insulating sheet 30 and the improvement of the heat radiation efficiency by brazing of the fins 150. However, the inventor of the present invention brazes the fins 150 to the cylinder 50 first, and then, the heat generating structure 100 is accommodated in the cylinder 50 and the cylinder 50 is crushed without deforming the fins 150. We found a manufacturing method and came to solve many years of problems.

Specifically, the load resistance of the fin 150 in the first direction D1 is larger than the load resistance of the cylindrical body 50 in the first direction D1. Thus, even if the fins 150 are attached to the cylindrical body 50 and then pressurized, the cylindrical body 50 can be crushed before the fins 150 are crushed. For this reason, the fins 150 are attached in advance to the cylindrical body 50 by brazing, and it becomes possible to pressurize the cylindrical body 50 through the fins 150 to crush the cylindrical body 50, and the insulation waterproof type using the insulating sheet 30 (polyimide) Even if there is, it becomes possible to configure the on-vehicle heater unit 1U to which the fins 150 are brazed.

The fact that the fins 150 can be fixed by brazing to the cylindrical body 50 can significantly reduce the time required for fixing as compared with the case of fixing with a silicone-based adhesive. Moreover, the fins 150 can be brazed to the cylinder 50 in advance without waiting for the pressing process of the cylinder 50. Therefore, the process of brazing the fins 150 and the process of pressing the cylindrical body 50 can be performed in parallel, and the production time can be shortened in mass production.

Here, as a configuration for increasing the load resistance of the fins 150, it is conceivable to configure the multi-stage fins 150.
FIG. 9 is a perspective view illustrating multistage fins.
In the in-vehicle heater unit 1U shown in FIG. 9, two stages of fins 150 are provided on the upper and lower surfaces of the in-vehicle heater 1, respectively. The fins 150 adjacent to the in-vehicle heater 1 are brazed by the brazing part 80. Further, it is preferable that the two-stage fins 150 be brazed to each other in order to improve the heat radiation efficiency. By forming the fins 150 in two stages, the cover plate 151 is interposed therebetween, and the load resistance in the first direction D1 can be increased more than in the case of one stage.

The number of stages of the fins 150 may be more than two. Moreover, even if it is except a multistage type, the thickness of the board | plate material of the fin 150 may be thickened, and the fin 150 may be shortened. Further, the side surface 53 may be easily bent by adjusting the groove 53 a of the side surface 53 of the cylindrical body 50.

In such a vehicle heater unit 1U, in addition to the insulation by the insulating sheet 30, the excellent waterproofness and the high withstand voltage by the sealing portion 60 and the cap 70, the efficiency improvement by the brazing of the fins 150 (heat radiation efficiency Improvement) can be achieved.

FIGS. 10A and 10B are diagrams for explaining another application example.
FIG. 10 (a) shows a vehicle heater unit 1U, and FIG. 10 (b) shows an application example to air conditioning.
The on-vehicle heater unit 1U shown in FIG. 10A has a configuration in which a plurality of on-vehicle heaters 1 and fins 150 are stacked. In the illustrated example, upper and lower fins 150 are attached to each of the four on-

vehicle heaters

1A, 1B, 1C, and 1D, and these are stacked.

Caps

71 and 72 are attached to the ends of the laminated structure. That is, the

caps

71 and 72 are attached so as to put together the ends of the plurality of on-

vehicle heaters

1A, 1B, 1C and 1D stacked. A bus bar (not shown) is provided inside the cap 71 so that the conduction cables C10 connected to the on-

vehicle heaters

1A, 1B, 1C and 1D can be collectively connected. From the cap 71, a first conductive cable C11 and a second conductive cable C12, which combine the respective conductive cables C10, extend one by one.

As shown in FIG. 10 (b), such an on-vehicle heater unit 1U is disposed in a flow passage R for sending warm air or the like into the vehicle. The fan F is provided in the front | former stage of the flow path R, and air is sent to the flow path R by rotation of the fan F (refer arrow A1, A2). An on-vehicle heater unit 1U is disposed downstream of the flow path R. The air sent by the fan F is heated by passing through the on-vehicle heater unit 1U, and is output as a warm air (see arrow A3).
In the present embodiment, the on-vehicle heater unit 1U obtains an output of 3 kilowatts (kW) or more. Moreover, the high withstand voltage, the excellent insulation property and the waterproofness of the on-vehicle heater unit 1U make it possible to use even in a severe environment.

As described above, in the on-vehicle heater 1 according to the present embodiment, a withstand voltage of 300 V or more can be obtained while having a simple sealing structure in which the

openings

50a and 50b of the cylindrical body 50 are sealed by the sealing portion 60. As a result, high waterproofness and high heat dissipation efficiency can be obtained.

Electric cars and hybrid cars handle voltages of about 300V to 400V. The on-vehicle heater 1 according to the present embodiment can be used by applying a voltage without step-down for such a high voltage. In addition, there is also a possibility that the car heater 1 may be submerged in water even if the car is submerged, suffers a tsunami or high tide, or is not submerged. Since the on-vehicle heater 1 according to the present embodiment has high waterproofness, leakage can be prevented even in a high voltage environment. Furthermore, the on-vehicle heater 1 according to the present embodiment can sufficiently withstand use in a severe environment where cold regions, bad roads, and dust are received. Moreover, with the increase in efficiency, miniaturization can be achieved if the output is the same, and high output can be achieved if the size is the same.

(Car heater device)
FIG. 11 is a perspective view illustrating an on-vehicle heater unit used for the on-vehicle heater device.
FIG. 12 is a perspective view illustrating the on-vehicle heater device.
13 (a) and 13 (b) are cross-sectional views illustrating the on-vehicle heater device, and FIG. 13 (a) shows a cross-sectional view seen in the direction along the flow path of the fin, and FIG. A cross-sectional view taken in the direction perpendicular to the path is shown.

The on-vehicle heater unit 1U has a structure in which a plurality of on-vehicle heaters 1 and a plurality of fins 150 are stacked. In the example illustrated, the in-vehicle heaters 1 are arranged in three rows and two stages, and two stages of fins 150 are stacked on the upper and lower sides of the in-vehicle heaters 1 of each stage. The number of on-vehicle heaters 1, the number of fins 150, and the number of stacked on-vehicle heaters 1 and fins 150 are arbitrary and are not limited to the illustrated numbers. The on-vehicle heater 1 has the configuration according to the present embodiment described above.

The fin 150 is bent so as to repeat a peak and a valley in the second direction D2. Thereby, the direction of the flow path 1501 which is a gap between the peak portion and the valley portion of the fin 150 is provided in the third direction orthogonal to the second direction D2. In the example shown in FIG. 11, a plurality of (for example, three) in-vehicle heaters 1 are juxtaposed in the third direction D3, and fins 150 are provided so as to cross these three. Therefore, the medium passing from one end 1501 a to the other end 1501 b of the flow path 1501 can obtain a heating action from the plurality of on-vehicle heaters 1.

The on-vehicle heater device 500 shown in FIG. 12 includes the on-vehicle heater unit 1U shown in FIG. 11 and a case 501. The in-vehicle heater unit 1U is housed in a case 501. The case 501 is provided with an inlet 5011 and an outlet 5012 for a medium (water, air, etc.) to be heated. The inflow port 5011 and the outflow port 5012 are provided, for example, in a cylindrical shape, and are provided so as to protrude from the side surface 501s of the case 501. The medium is sent from the inflow port 5011 into the case 501 and comes out of the case 501 from the outflow port 5012 while being heated by the on-vehicle heater unit 1U in the case 501.

In the present embodiment, the inlet 5011 and the outlet 5012 are arranged side by side on the same side surface 501s of the case 501. In such an on-vehicle heater device 500, the on-vehicle heater unit 1 U is accommodated in the case 501 with one end 1501 a of the flow path 1501 of the fin 150 facing the inflow port 5011 and the outflow port 5012.

As shown in FIG. 13, the mounting portion of the on-vehicle heater 1 is provided on the inner wall of the case 501. The attachment portion is, for example, a recess 5015. In the present embodiment, each of the caps 70 provided at both ends of the in-vehicle heater 1 is fitted into the recess 5015. Thereby, the accommodation position in case 501 of heater unit 1U for vehicles is decided.

The case 501 is provided with a first hole h1 and a second hole h2 for passing the first conduction cable C11 and the second conduction cable C12 extending from the in-vehicle heater 1 respectively. The first conduction cable C11 of the in-vehicle heater 1 housed in the case 501 is drawn out of the case 501 through the first hole h1 of the case 501. In addition, the second conductive cable C12 is pulled out of the case 501 through the second hole h2 of the case 501.

In the case 501, only the first hole h1 and the second hole h2 are provided as holes other than the inlet 5011 and the outlet 5012. The first hole h1 and the second hole h2 provided in the case 501 may have a diameter sufficient to pass the conductive cable C10.

A sealant 65 is embedded in each of the gap between the first hole h1 and the first conductive cable C11 and the gap between the second hole h2 and the second conductive cable C12. The sealant 65 prevents the medium flowing into the case 501 from leaking out of the case 501 from the first hole h1 and the second hole h2.

The waterproofness of the on-vehicle heater 1 according to the present embodiment is very high. Therefore, the whole of the on-vehicle heater 1 can be accommodated in the case 501. For example, if the medium is a liquid (eg, water), the case 501 is filled with water. Since the waterproofness of the on-vehicle heater 1 according to the present embodiment is very high, even if the entire on-vehicle heater 1 including the cap 70 is accommodated in the case 501, the inside of the on-vehicle heater 1 is not flooded. .

For this reason, the holes opened in the case 501 other than the inflow port 5011 and the outflow port 5012 are only the small first holes h1 and the second holes h2 through which the conduction cable C10 passes. Since the holes provided in the case 501 are small, only a slight gap between the holes (the first hole h1 and the second hole h2) and the conductive cable C10 may be sealed with the sealing agent 65, and the sealing is easy. Become. Furthermore, even if the amount of the sealing agent 65 is small, reliable sealing can be performed, and high sealing performance can be realized while being simple.

In order to heat the medium by the on-vehicle heater device 500, the medium is fed into the case 501 from the inflow port 5011. The medium having flowed into the case 501 flows along the flow path 1501 of the fin 150. In the present embodiment, since the flow path 1501 of the fin 150 and the extending direction of the inflow port 5011 substantially coincide with each other, the inflowing medium efficiently flows along the flow path 1501 of the fin 150.

The medium flowing along the flow path 1501 is heated by heat exchange with the fins 150, and flows out from the outlet 5012 to the outside of the case 501. In this embodiment, since the flow path 1501 of the fin 150 and the extending direction of the outlet 5012 substantially coincide with each other, the medium heated along the flow path 1501 efficiently flows out from the outlet 5012 to the outside. .

FIG. 14 is a perspective view illustrating another on-vehicle heater device.
In the on-vehicle heater device 500 shown in FIG. 14, the inflow port 5011 and the outflow port 5012 are disposed at mutually opposing positions in the case 501. The extending direction of the inlet 5011 and the extending direction of the outlet 5012 substantially coincide with each other.

In such an on-vehicle heater device 500, the on-vehicle heater unit 1U causes one end 1501a (see FIG. 11) of the flow passage 1501 of the fin 150 to face the inflow port 5011 and the other end 1501b (see FIG. 11). And the outlet 5012 are accommodated in the case 501.

A tapered portion 5013 is provided at a portion of the case 501 to which each of the inlet 5011 and the outlet 5012 is attached. The tapered portion 5013 on the inflow port 5011 side is formed so that the cross-sectional area gradually expands from the inflow port 5011 toward the inside of the case 501. In the inside of the case 501, an on-vehicle heater unit 1U in which multiple fins 150 are formed is accommodated. By providing the tapered portion 5013, the medium flowing from the inflow port 5011 can be uniformly diffused and guided to the inside of the case 501, and the medium flows evenly in the entire flow path 1501 of the multistage fins 150. be able to. Thereby, high heat exchange efficiency can be realized.

The tapered portion 5013 on the outlet 5012 side is formed so that the cross-sectional area gradually narrows from the inside of the case 501 toward the outlet 5012. As a result, the medium that has passed through the channels 1501 of the multi-stage fins 150 of the in-vehicle heater unit 1U housed in the case 501 is efficiently collected at the outlet 5012 by the tapered portion 5013. It will flow out.

Also in the on-vehicle heater device 500, only the first hole h1 and the second hole h2 are provided in the case 501 as holes other than the inflow port 5011 and the outflow port 5012. Since the holes provided in the case 501 are small, reliable sealing performance can be obtained even with a small amount of the sealing agent 65.

In the on-vehicle heater device 500 according to the present embodiment as shown in FIGS. 12 and 14, since the on-vehicle heater 1 having high withstand voltage, excellent insulation and waterproofness is used, withstand voltage of 300 V or more As a result, high waterproofness and high heat dissipation efficiency can be obtained. In addition, by brazing the fins 150, it is possible to achieve high efficiency (improvement of heat dissipation efficiency). Therefore, downsizing of the on-vehicle heater device 500 can be achieved with the same output, and high output of the on-vehicle heater device 500 can be achieved with the same size.

FIG. 15 is a schematic view showing an application example of the on-vehicle heater device.
In FIG. 15, the specific example which attached the vehicle-mounted heater apparatus 500 demonstrated previously to the vehicles provided with engines 5, such as a motor vehicle, is shown.
A case 501 accommodating the in-vehicle heater unit 1U is connected to the circulation passage 6. The circulation passage 6 has conduits 6a to 6d. The conduit 6a connects the case 501 and the heater core 2H. The conduit 6 b connects the heater core 2 H and the hydraulic pump 3. The conduit 6 c connects the hydraulic pump 3 and the three-way valve 4. The conduit 6 d connects the three-way valve 4 and the case 501. The conduit 6 d is connected to the inlet 5011 of the case 501, and the conduit 6 a is connected to the outlet 5012 of the case.

Further, the circulation passage 6 and the case 501 are also connected to the engine 5 via the

conduits

7a and 7b. When the hydraulic pump 3 is driven in a state where the three-way valve 4 shuts off between the pipeline 6c and the pipeline 7a and brings the pipeline 6c and the pipeline 6d into communication, the inside of the case 501 and The liquid circulates in the circulation path 6 in the direction indicated by the arrow A11 shown in FIG.

At this time, by supplying power from the battery mounted on the vehicle to the on-vehicle heater unit 1U in the case 501, the on-vehicle heater unit 1U generates heat, and the liquid in the case 501 is overheated. The hot water generated by this superheating is supplied to the heater core 2H through the outlet 5012 and the pipe line 6a.

Hot water supplied to the heater core 2H flows through a pipe provided in the heater core 2H. Gas (air) is blown from the blower 8 to the heater core 2H. The heat of the hot water flowing through the tube of the heater core 2H is transferred to the gas blown from the blower 8 through a heat transfer surface such as a fin provided on the heater core 2H. Thus, the warm air is blown into the car. This mode is selected when exhaust heat of the engine 5 can not be used, for example, at the start of the engine 5.

After the engine 5 is started, the three-way valve 4 is switched to connect the pipe line 6c and the pipe line 7a and to shut off the pipe line 6c and the pipe line 6d. Act as. The flow of the liquid at this time is shown by arrow A12 in FIG. Hot water passing through the engine 5 and warmed by heat exchange with the engine 5 is supplied to the heater core 2H via the

conduits

7b and 6d, the inlet 5011, the inside of the case 501, the outlet 5012 and the conduit 6a. Therefore, in this mode, warm water can be supplied to the heater core 2H without energizing (heating) the on-vehicle heater unit 1U, and hot air can be sent into the vehicle by driving the blower 8.

The on-vehicle heater device 500 according to the present embodiment can be incorporated as it is into an existing on-vehicle hot water generation system using cooling water heated by the exhaust heat of the engine 5.

FIG. 16 is a schematic view showing another application example of the on-vehicle heater device.
FIG. 16 shows a specific example in which the on-vehicle heater device 500 described above is attached to a vehicle such as an electric vehicle that does not have the engine 5.
In a vehicle not equipped with the engine 5 such as an electric car, a motor M is used as a drive source instead of the engine 5. In this case, the case 501 accommodating the in-vehicle heater unit 1U is connected to the circulation passage 6. The three-way valve 4 and the

conduits

7a and 7b as shown in FIG. 15 are not connected to the circulation passage 6.

Since the exhaust heat of the motor M is not used, the warm air is sent into the vehicle in the same operation as the mode selected when the exhaust heat of the engine 5 can not be utilized at the start of the engine 5 described above. That is, when the hydraulic pump 3 is driven, the liquid circulates in the case 501 and the circulation path 6 in the direction indicated by the arrow A13 shown in FIG.

At this time, by supplying power from the battery mounted on the vehicle to the on-vehicle heater unit 1U in the case 501, the on-vehicle heater unit 1U generates heat, and the liquid in the case 501 is overheated. The hot water generated by this superheating is supplied to the heater core 2H through the outlet 5012 and the pipe line 6a. Then, the heat of the hot water flowing through the tube of the heater core 2H is transmitted to the gas blown from the blower 8 and the warm air is blown into the car.

The on-vehicle heater device 500 according to the present embodiment can be used by being incorporated into a warm air generation system of a vehicle such as an electric car that does not use the engine 5.

(Heat pump system)

FIG. 17 is a schematic view of a heat pump system. The heat pump system includes two

heat exchangers

101 and 105, an expansion valve 103, a compressor 107, and the on-vehicle heater device 500 of the embodiment described above.

A refrigerant (a medium such as non-fluorocarbon gas) circulates in the system. The refrigerant is compressed by the compressor 107 and is sent to the heat exchanger 101 through the pipe 108 in the state of high-temperature high-pressure gas. Then, the refrigerant is condensed by heat exchange with the fluid (air or liquid) to be heated in the heat exchanger 101, and is sent to the expansion valve 103 through the pipe 102 in the state of a high-temperature high-pressure liquid.

The refrigerant expanded by the expansion valve is sent to the heat exchanger 105 through the pipe 104 in the form of a low temperature and low pressure liquid. By the heat exchange with the atmosphere or the like in the heat exchanger 105, the refrigerant is evaporated and sent to the compressor 107 through the pipe 106 in the state of low-temperature low-pressure gas, and the cycle described above is repeated.

The on-vehicle heater device 500 according to the present embodiment is connected to the pipe 106 between the heat exchanger 105 and the compressor 107 and heats the low pressure gas sent from the heat exchanger 105 to the compressor 107. That is, the on-vehicle heater device 500 assists the refrigerant heating in the path between the heat exchanger 105 and the compressor 107.

In the on-vehicle heater device 500, the low pressure gas flows in the flow path 1501 described above, and the gas is heated by the heating element 10. That is, the on-vehicle heater device 500 is effective not only for the liquid but also for heating the gas.

Further, as shown in FIG. 18, the on-vehicle heater device 500 may be connected to the pipe 108 between the compressor 107 and the heat exchanger 101 to heat the liquid flowing through the pipe 108. Further, although not shown, the on-vehicle heater device 500 may be connected to the pipe 102. Further, in the heat pump system, two or more on-vehicle heater devices 500 may be connected to appropriate pipes. The on-vehicle heater device 500 may be connected to any of the

pipes

102, 106 and 108 in the heat pump system, but is preferably connected to the low pressure pipe 106.

FIG. 19 is a partially exploded perspective view showing a configuration example of a vehicle-mounted heater device applied to the heat pump system.
FIG. 19 shows a state in which the taper portion 5013 on one side of the case 501 is removed.
In the on-vehicle heater device 500 shown in FIG. 19, the direction of the flow path 1501 of the fin 150 is extended in the direction connecting the inflow port 5011 and the outflow port 5012. That is, in the on-vehicle heater device 500, the longitudinal direction of the on-vehicle heater unit 1U accommodated in the case 501 matches the direction of the flow path 1501 of the fin 150. Thus, the medium such as the refrigerant that has flowed into the case 501 from the inflow port 5011 naturally flows into the flow path 1501 of the fin 150, and the medium that has flowed out of the flow path 1501 naturally flows out from the outflow port 5012 It will go.

In the on-vehicle heater unit 1U, a protrusion 530 is provided on the side surface 53 of the cylindrical body 50. The protrusion 530 protrudes outward beyond the fin 150 in the width direction. In the example shown in FIG. 19, the protrusion 530 is provided on each of the left and right side surfaces 53 of the cylindrical body 50.

Each of the opposing inner walls of the case 501 is provided with a pair of convex portions 5021. When the on-vehicle heater unit 1U is accommodated in the case 501, a projection of the cylindrical body 50 is formed between the pair of convex portions 5021 530 is inserted. As a result, when the in-vehicle heater unit 1U is accommodated in the case 501, the projection 530 serves as a support, and thus the in-vehicle heater unit 1U is positioned at a predetermined position in the case 501 without applying a force to the fins 150. be able to.

The length (height) of the protrusion 530 in the thickness direction is longer than the length of the cylindrical body 50 in the thickness direction. It is preferable that the height of the protrusion 530 be equal to or slightly larger than the height of the fin 150. Thus, the side surface of the fin 150 is covered by the protrusion 530. When the side surface of the fin 150 is covered by the protrusion 530, the influence of the temperature outside the case 501 can be suppressed from being transmitted to the fin 150 in the case 501. For example, when used in an environment where the influence of air temperature is large, such as in a cold area or a warm area, the side surface of the fin 150 is covered by the projecting portion 530, so that the influence of the outside air temperature becomes difficult to be transmitted to the fin 150, It becomes easy to exhibit the heating performance by heater unit 1U for vehicles.

The protrusion 530 may be provided integrally with the side surface 53 of the cylindrical body 50, may be provided separately from the cylindrical body 50, and may be attached to the side surface 53. In addition to the example shown in FIG. 19, the on-vehicle heater unit 1U provided with the projecting portion 530 is also applicable to the on-vehicle heater device 500 shown in FIGS. 12 and 14.

As described above, according to the embodiment, it is possible to provide the on-vehicle heater 1 that can cope with a severe environment without adopting a complicated configuration.

(Insulated waterproof heater)
FIG. 20A and FIG. 20B are views exemplifying the insulated waterproof heater according to the present embodiment. FIG. 20 (a) shows a perspective view of the insulated waterproof heater 2, and FIG. 20 (b) shows an enlarged cross-sectional view taken along the line DD of (a).
FIG. 21 is an exploded perspective view illustrating the heat generating member.
The insulation and waterproof type heater 2 according to the present embodiment is a tubular temperature control device having waterproofness and electrical insulation. The insulated waterproof heater 2 includes a heating element 10, a pair of electrode units 20, a cylinder 50, an insulating powder 40, a sealing body 90, and a pair of conductive cables C10.

Electrode layers 10 a are provided on the front and back of the heater element 10. For example, a PTC element is used for the heating element 10. The heating element 10 is held between the pair of electrode portions 20. As a result, each of the front and back electrode layers 10a of the heat generating element 10 and each of the pair of electrode portions 20 are brought into conduction.

The heat generating element 200 and the pair of electrode parts 20 constitute a heat generating member 200. As shown in FIG. 21, the heat generating member 200 preferably has the same configuration as the heat generating structure 100 (see FIG. 2) described above. However, the heat generating member 200 is different from the heat generating structure 100 in that the insulating sheet 30 is not provided.

The cylindrical body 50 accommodates the heat generating member 200 inside. The cylinder 50 is provided, for example, in a cylindrical shape. The cylindrical body 50 may be other than a cylindrical shape, but if it is a cylindrical shape, manufacture is easy and cost can be easily reduced.

For example, stainless steel is used for the cylindrical body 50. Since stainless steel has high water resistance and chemical resistance, high durability can be obtained when the insulated waterproof heater 2 is used by being immersed in water or liquid.

The outer surface of the cylindrical body 50 is a heat dissipation surface 51. If the cylindrical body 50 is cylindrical, the heat dissipation surface 51 becomes a circumferential surface, and heat can be uniformly transmitted to the periphery. The heat radiation surface 51 may be flat, or may be provided with asperities or grooves (such as spiral grooves). The heat dissipating surface 51 may be provided with fins. By providing the asperities, the grooves, and the fins, the heat radiation efficiency can be enhanced as compared with the case where the heat radiation surface 51 is flat.

The inside of the cylindrical body 50 is filled with the insulating powder 40. The insulating powder 40 serves to electrically insulate the cylindrical body 50 and the heat generating member 200 accommodated in the cylindrical body 50. That is, the insulating powder 40 is embedded in the gap between the inner surface of the cylindrical body 50 and the heat generating member 200. Thereby, the direct contact between the cylindrical body 50 and the heat generating member 300 is prevented. The cylindrical body 50 has the hollow portion 55 before the insulating powder 40 is filled. The whole of the hollow portion 55 may be embedded with the insulating powder 40, or a part of the hollow portion 55 may remain after the filling of the insulating powder 40.

For example, magnesium oxide (MgO) is used as the insulating powder 40. By filling the inside of the cylindrical body 50 with the insulating powder 40, the heat-generating member 200 is positioned near the center of the inside of the cylindrical body 50 so as not to be in contact with the inner surface of the cylindrical body 50. The heat generating member 200 is a plate-like mold, and when the heat generating member 200 is housed in the cylindrical hollow portion 55, the gap between the heat generating member 200 and the inner surface of the cylindrical body 50 is filled with the insulating powder 40. Thus, the position of the heat generating member 200 inside the cylindrical body 50 is fixed. Therefore, the insulating powder 40 also serves to position the heat generating member 200 inside the cylindrical body 50 as well as electrically insulating.

A sealing body 90 is provided at the open end of the cylindrical body 50. For example, in the case where both ends of the cylindrical body 50 are open, the sealing body 90 is provided at the opening ends of both ends, one end is open, and the other end is closed, the sealing body is provided at one end. 90 are provided. The sealing body 90 may be a cap or an embedding material.

In the case of a cap, metal (for example, stainless steel) or resin is used as the sealing body 90. The sealing body 90 by the cap is fitted to the open end of the cylindrical body 50 and sealed and fixed by welding, adhesion or the like. In the case of the embedding material, a silicone resin or the like is used as the sealing body 90. The sealing body 90 made of the embedding material is embedded in the cylinder from the open end of the cylinder 50 and seals the inside of the cylinder.

The pair of conductive cables C10 are respectively conducted to the pair of electrode portions 20, penetrate the sealing body 90, and are drawn out of the cylindrical body 50. It is preferable that the lead exposed from the insulation coating material at the end of the conductive cable C10 be connected by caulking at the caulking portion 250.

(Example of application of insulation and waterproof type heater)
FIG. 22 is a perspective view showing an application example of the insulating waterproof heater.
The exterior shape of the insulation and waterproof type heater 2 according to the present embodiment is the shape of the cylindrical body 50 (for example, a cylindrical shape). Therefore, for example, as the cylindrical body 50 is inserted into the container V, the object in the container V can be heated (temperature control). For example, in the case of a system in which the liquid LQ is fed into the container V and the liquid LQ is heated and delivered in the container V, the cylindrical body 50 of the insulating waterproof heater 2 is inserted into the approximate center of the container V.

When the temperature of the liquid LQ in the container V becomes lower than a predetermined threshold value, a voltage is applied to the heat generating member 200 from the conduction cable C10. Thereby, the heat generating element 10 generates heat, and the liquid LQ in the container V is heated via the heat dissipation surface 51 of the cylindrical body 50. When the heating element 10 is a PTC element, it has positive temperature characteristics. Thereby, when the temperature reaches a certain temperature, the current is suppressed by the increase of the resistance value. Therefore, when heating the liquid LQ, it can control so that it does not become more than fixed temperature. In particular, when the liquid LQ is a medicine and it is desired to suppress the temperature rise more than necessary or when it is desired to prevent the deterioration due to the temperature, the temperature control can be accurately performed with a simple configuration by using the insulation waterproof heater 2 according to the present embodiment. It is possible to realize

In addition, although this embodiment and its application example (modification, concrete example) were described above, the present invention is not limited to these examples. For example, although the example of the caulking part 250 was shown as a terminal which connects the conduction | electrical_connection cable C10, the terminal part extended in flat form may be sufficient. In this case, the conductive cable C10 may be connected by soldering, brazing, screwing, or may be connected by a connector. Further, although an example in which a PTC element is used as the heating element 10 is shown, an element other than the PTC element (for example, a ceramic such as alumina or silicon nitride) may be used. Further, the medium to be heated may be water, air, gas, and other objects such as oil and gel (including a mixture of at least one of them). The material of the insulating sheet 30 may be an alumina plate, an insulating ceramic plate, or another insulating material other than a polyimide film. In addition, those skilled in the art appropriately add, delete, or change the design elements of the above-described embodiments or their application examples (modifications and specific examples) as appropriate, and appropriately combine the features of the embodiments Are also included in the scope of the present invention as long as they include the subject matter of the present invention.

INDUSTRIAL APPLICABILITY The present invention can be suitably used as a heating device driven by a high voltage of 300 V or more, such as heating of vehicles (electric vehicles, hybrid vehicles, etc.), trains and other mobile objects, and industrial devices.

1, 2A, 1B, 1C, 1D: In-vehicle heater 2: Insulated waterproof type heater 1U: In-vehicle heater unit 10: Heating element 10a: Electrode layer 20: Electrode portion 30: Insulating

sheet

30a, 30b: End 40 Insulating powder 50:

cylinder

50a, 50b: opening 50c: inner surface 51: heat dissipation surface 53: side surface 53a: groove 55: hollow portion 60: sealing

portion

70, 71, 72: cap 70a: recess 70h: through hole 80 Brazed portion 90: Sealed body 100: Heating structure 101, 105:

Heat exchangers

102, 104, 106, 108: Piping 103: Expansion valve 107: Compressor 150: Fin 151: Cover plate 200: Heating plate 201: Heating member 201 First electrode portion 202 Second electrode portion 210 Plate-like portion 211 First plate-like portion 212 Second plate-like portion 220 Terminal portion 221 First terminal portion 222 Second terminal portion 2 0 ... convex extension part 231 ... first convex extension part 232 ... second convex extension part 250 ... caulking part 250a ... caulking piece 251 ... first caulking part 252 ... second caulking part 255 ... caulking collar 500 ... car heater device 1501 ... flow path 1501a ... one end 1501b ... other end 5011 ... inflow port 5012 ... outflow port A1, A2, A3, A11, A12, A13 ... arrow C10 ... conductive cable C11 ... first conductive cable C12 ... first 2 Conduction cable D1 ... first direction D2 ... second direction D3 ... third direction F ... fan G ... gap h1 ... first hole h2 ... second hole LQ ... liquid R ... flow path V ... container

Claims

A heating element provided with an electrode layer on the front and back;
A pair of electrode parts sandwiching the heat generating element between them and electrically conducting to each of the front and back electrode layers;
An insulating sheet covering the periphery of the pair of electrode parts;
A cylindrical body which has a hollow portion and a heat radiation surface, and which accommodates a heat generating structure constituted by the heat generating element, the pair of electrode portions, and the insulating sheet in the hollow portion;
A sealing portion sealing the openings at both ends of the cylindrical body;
A pair of caps which have a recess and in which both ends of the cylinder are respectively fitted in the recess to close the hollow portion;
High withstand voltage insulated and waterproof type automotive heater provided with
The first electrode portion which is one of the pair of electrode portions is
A first plate-like portion in electrical contact with the electrode layer;
And a first terminal portion provided at one open end of the cylinder in the first plate-like portion;
The second electrode portion, which is the other of the pair of electrode portions,
A second plate-like portion in electrical contact with the electrode layer;
And a second terminal portion provided at one open end of the cylinder in the second plate-like portion;
A direction in which the heating element is held between the pair of electrode portions is a first direction, which is orthogonal to the first direction, and a direction in which the cylinder extends is a second direction, the first direction, and the second direction. If the direction orthogonal to
When viewed in the first direction, the first terminal portion and the second terminal portion are disposed at mutually offset positions,
The sealing portion for sealing the one opening of the cylinder is provided to embed the first terminal portion and the second terminal portion surrounded by the insulating sheet, and the insulating sheet and the cylinder are provided. It is provided to intervene in the gap with the inner surface of the body,
The high withstand voltage insulated and waterproof vehicle-mounted heater which is accommodated in the hollow portion of the cylindrical body sealed by the cap and the sealing portion and which is not exposed outside the cylindrical body.
A high-pressure structure according to claim 1, wherein the sealing portion constitutes a waterproof structure to the inside of the cylinder and a withstand voltage structure of 300 volts or more between the first terminal portion and the second terminal portion. Withstand voltage insulated waterproof vehicle heater.
The high withstand voltage insulated and waterproof vehicle-mounted heater according to claim 1, wherein the sealing portion is made of a material having a heat-resistant temperature of 150 ° C. or higher.
The first terminal portion has a first caulking portion,
The second terminal portion has a second caulking portion,
The first electrode portion has a first convex extending portion provided between the first plate portion and the first caulking portion,
The second electrode portion has a second convexly extending portion provided between the second plate-like portion and the second caulking portion,
The length in the second direction of the first projecting extension portion is longer than the length in the second direction of the caulking weir on the side of the first projecting extension portion in the first caulking portion,
The length in the second direction of the second convexly extending portion is longer than the length in the second direction of the crimped ridge on the second convexly extending portion side of the second crimped portion. 3. The high withstand voltage insulated and waterproof vehicle heater according to any one of 3. to 3.
The length in the third direction of the first convex extension portion is longer than the length in the third direction of the first caulking portion,
The high withstand voltage insulated and waterproof vehicle heater according to claim 4, wherein the length in the third direction of the second convexly extending portion is longer than the length in the third direction of the second caulking portion.
The length in the third direction of the first convex extension portion is shorter than half of the length in the third direction of the first plate-like portion,
The length in the third direction of the second convexly extending portion is shorter than half of the length in the third direction of the second plate-like portion,
The high withstand voltage insulated waterproof vehicle according to claim 4, wherein the first convex extending portion and the second convex extending portion are disposed so as not to overlap with each other when viewed in the first direction. Heater for.
The high withstand voltage insulated and waterproof vehicle heater according to any one of claims 1 to 6, wherein a thickness of the heat generating element is 3 mm or more.
The high withstand voltage insulated waterproof vehicle according to any one of claims 1 to 7, wherein a gap between the first terminal portion and the second terminal portion is 2.5 mm or more when viewed in the first direction. Heater for.
The length in the third direction of the first plate-like portion and the length in the third direction of the second plate-like portion are longer than the length in the third direction of the electrode layer, and The high withstand voltage insulated and waterproof vehicle-mounted heater according to any one of claims 1 to 8, which is equal to or less than the length in the third direction.
The length in the third direction of the first plate-like portion and the length in the third direction of the second plate-like portion are 20 millimeters or more and 30 millimeters or less. The high withstand voltage insulated and waterproof type vehicle heater according to Item.
The high withstand voltage insulated waterproof vehicle heater according to any one of claims 1 to 10, wherein both ends of the winding in the insulating sheet overlap each other at side portions of the heat generating element.
The high withstand voltage insulated and waterproof vehicle heater according to any one of claims 1 to 11, wherein the heating element is a PTC (Positive Temperature Coefficient) element.
The high withstand voltage insulated and waterproof vehicle-mounted heater according to any one of claims 1 to 12, wherein the sealing portion is a silicone resin.
The high voltage-resistant insulation waterproof vehicle-mounted heater according to any one of claims 1 to 13,
A fin attached to the heat dissipation surface of the cylindrical body via a brazing portion;
In-vehicle heater unit equipped with
A heating element provided with an electrode layer on the front and back;
A pair of electrode parts sandwiching the heat generating element between them and electrically conducting to each of the front and back electrode layers;
An insulating sheet covering the periphery of the pair of electrode parts;
A cylindrical body which has a hollow portion and a heat radiation surface, and which accommodates a heat generating structure constituted by the heat generating element, the pair of electrode portions, and the insulating sheet in the hollow portion;
A sealing portion sealing the openings at both ends of the cylindrical body;
A fin attached to the heat dissipation surface of the cylindrical body via a brazing portion;
In-vehicle heater unit equipped with
The in-vehicle heater unit according to claim 14 or 15, wherein a load resistance in a thickness direction of the fin is larger than a load resistance in a thickness direction of the cylinder.
It further has a projection provided on the side of the cylinder,
The in-vehicle heater unit according to any one of claims 14 to 16, wherein a length in a thickness direction of the protrusion is longer than a length in a thickness direction of the cylinder.
An on-vehicle heater unit according to any one of claims 14 to 17.
A case having an inlet for the medium and an outlet for the medium;
Equipped with
The on-vehicle heater device is accommodated in the case with one end of the flow path of the fin facing each of the inlet and the outlet.
An on-vehicle heater unit according to any one of claims 14 to 17.
A case having an inlet for the medium and an outlet for the medium;
Equipped with
The in-vehicle heater unit has one end of the flow path of the fin opposed to the inflow port, and the other end of the flow path opposed to the outflow port, and the inflow port and the outflow port in the case. In-vehicle heater device housed between.
The case is provided with a first hole for passing a first conducting cable conducting to the first electrode portion, and a second hole for passing a second conducting cable conducting to the second electrode portion,
20. The on-vehicle heater according to claim 18, wherein a sealant is embedded in each of a gap between the first hole and the first conductive cable and a gap between the second hole and the second conductive cable. apparatus.
21. The on-vehicle heater device according to any one of claims 18 to 20, wherein the medium is at least one of water, air, gas, oil and gel.
Brazing a fin to the heat dissipation surface of a cylindrical body having a hollow portion and a heat dissipation surface;
Sandwiching a heating element provided with an electrode layer on the front and back with a pair of electrode parts;
Covering the periphery of the pair of electrode portions with an insulating sheet;
Housing the heat-generating structure constituted by the heat-generating element, the pair of electrode parts, and the insulating sheet in the hollow portion of the cylinder to which the fin is brazed;
Securing the heat generating structure in the hollow portion by pressing the cylinder through the fins to crush the cylinder;
Method of manufacturing an on-vehicle heater unit provided with
A heating element provided with an electrode layer on the front and back;
A pair of electrode parts sandwiching the heat generating element between them and electrically conducting to each of the front and back electrode layers;
A cylindrical body for accommodating a heat generating member constituted by the heat generating element and the pair of electrode portions;
Insulating powder which is filled in the inside of the cylinder and which electrically insulates the cylinder and the heat generating member;
A sealing body for sealing at least one open end of the cylindrical body;
A pair of conducting cables which are respectively conducted to the pair of electrode parts and are drawn out of the cylindrical body through the sealing body;
Insulated waterproof heater.
The first electrode portion which is one of the pair of electrode portions is
A first plate-like portion in electrical contact with the electrode layer;
And a first terminal portion provided at one open end of the cylinder in the first plate-like portion;
The second electrode portion, which is the other of the pair of electrode portions,
A second plate-like portion in electrical contact with the electrode layer;
And a second terminal portion provided at one open end of the cylinder in the second plate-like portion;
A direction in which the heating element is held between the pair of electrode portions is a first direction, which is orthogonal to the first direction, and a direction in which the cylinder extends is a second direction, the first direction, and the second direction. If the direction orthogonal to
The insulation / water proof heater according to claim 23, wherein the first terminal portion and the second terminal portion are disposed at mutually offset positions as viewed in the first direction.
The cylinder is cylindrical,
The insulation and waterproof type heater according to claim 23 or 24, wherein the heat generating member is a plate-like type.
The insulation and waterproof heater according to any one of claims 23 to 25, wherein a material of the cylinder is stainless steel.