CN216960231U - PTC fin heater - Google Patents

Abstract

A PTC fin heater includes a heat dissipation structure formed by machining after a large number of heat dissipation fins are inserted into a plurality of hollow metal tubes. The space between them is filled with thermally conductive material to form a heating plate, plastic brackets are installed at both ends, protective strips are installed on both sides, and fixed plates are installed at the bottom of the plastic brackets, and a power control box is installed on the outside of one of the plastic brackets. Silicone pads are arranged between them, and the side of the power control box facing the heating plate is provided with an electric heating tube through hole that matches the outer diameter of the PTC electric heating tube. The wire end of the PTC electric heating tube extends into the power control box through the electric heating tube through hole. , A heat-conducting aluminum block is arranged between the adjacent PTC electric heating pipes, and the heat-conducting aluminum block is fitted with the outer diameter of the PTC electric heating pipe. The utility model has the advantages of light overall weight, uniform heating and high heating efficiency.

Description

A PTC fin heater

technical field

The utility model relates to the field of electricity, in particular to an electric heating device, in particular to a PTC fin heater.

Background technique

At present, the electric bus PTC heaters widely used in the market are composed of PTC electric heating pipes, cooling strips, plastic brackets, power control boxes, thermostats, and stainless steel frames. Excellent low temperature start-up, high IP protection level, long service life, no damage to dry burning, safety and environmental protection and many other advantages.

However, the heat dissipation area of traditional electric bus PTC heaters only accounts for about half of the total area of the heaters, so the power of the PTC heaters cannot be fully utilized; and the structure also has the disadvantage of uneven temperature distribution, and its heat generation There is a large gap between the two sides of the plate and the frame. When the bus heater is started, only the air passing through the heating plate in the middle of the heater will be heated, and the air entering from the gap on both sides of the heating plate will still be heated. It is in the state of cold air. When the cold and hot air enter the air-conditioning duct at the same time and are mixed, it not only reduces the heating effect of the heater, but also easily generates a large amount of water vapor in the air-conditioning duct. In addition, the traditional electric bus PTC heater generates heat. The fins of the plate and the central heating pipe are a two-section split structure, which needs to be fixed by a stainless steel frame, which makes the product's own weight relatively heavy, which is not conducive to the design concept of lightweight products.

Utility model content

Aiming at the above-mentioned defects in the prior art, the utility model provides a PTC fin heater with large heat dissipation area, uniform heating and lightweight product structure.

To achieve the above object, the utility model adopts the following technical solutions:

A PTC fin heater, comprising a heating plate, a power supply control box, and a temperature controller, is characterized in that it also includes a front plastic bracket and a rear plastic bracket arranged at both ends of the heating plate in the axial direction. Protective strips are installed on both sides, the heating plate is provided with more than two hollow metal tubes, a plurality of fins are inserted and fixed on the hollow metal tubes, and the interior of the hollow metal tubes are correspondingly provided with the same number of hollow metal tubes. The PTC electric heating tube is filled with a thermally conductive material between the hollow metal tube and the PTC electric heating tube. A front fixing plate and a rear fixing plate are respectively installed at the bottoms of the front plastic bracket and the rear plastic bracket, and the outer side of the rear plastic bracket is installed with the The power control box, an inner silicone pad is arranged between the power control box and the rear plastic bracket, the side of the power control box facing the heating plate is provided with an electric heating tube through hole that matches the outer diameter of the PTC electric heating tube, and the wire end of the PTC electric heating tube The electric heating pipe extends into the power control box through the through hole, and a heat-conducting aluminum block is arranged between every two adjacent PTC electric heating pipes. The heat-conducting aluminum block matches the outer diameter of the PTC electric heating pipe, so The temperature controller is composed of a manual temperature controller and an automatic temperature controller, and the manual temperature controller and the automatic temperature controller are respectively arranged on the left and right sides of the heat-conducting aluminum block.

Further, the outer side of the power control box is provided with a front cover of the power box, the front cover of the power box is connected to the power control box by means of screws or snaps, and an outer silicone pad is arranged between the two, and the The surface of the front cover of the power box is provided with a manual reset button connected to the manual thermostat. In addition, the surface of the front cover of the power box is also provided with a small grid head and a large grid head, and the small grid head is interspersed with A low-voltage wire, the low-voltage wire is connected in series with the manual thermostat and the automatic thermostat, a high-voltage wire is interspersed in the large gland, and the high-voltage wire is connected in parallel with the PTC electric heating tube.

Further, the thickness of the thermally conductive aluminum block is greater than or equal to 3 mm, the joint surface of the thermally conductive aluminum block and the outer diameter of the PTC electric heating pipe is set in the shape of a semi-circular hole, and the thermally conductive aluminum block is in the shape of a semicircle. The joint surface of the PTC electric heating tube and the manual thermostat and the automatic thermostat is coated with thermally conductive silica gel.

Further, the guard strips are provided with guard strip connecting pieces at intervals, and the guard strip connecting pieces are horizontally and perpendicular to the guard strips to connect the guard strips on both sides together.

Further, the PTC electric heating tube is composed of PTC heating ceramics, dummy sheets, electrode sheets, wires, polyimide insulating films, silica gel plugs, and metal inner tubes.

Further, the manual thermostat and the automatic thermostat are connected in series.

The PTC fin heater of the utility model includes a heat dissipation structure formed by machining after a large number of heat dissipation fins are inserted into a plurality of hollow metal tubes. A heat-conducting material is filled between the two to form a heating plate, plastic brackets are installed at both ends, protective strips are installed on both sides, a fixing plate is installed at the bottom of the plastic bracket, and a power control box is installed on the outside of one of the plastic brackets. There is a silicone pad between the two, and the side of the power control box facing the heating plate is provided with an electric heating tube through hole that matches the outer diameter of the PTC electric heating tube. The wire end of the PTC electric heating tube extends into the power control through the electric heating tube through hole. Inside the box, a heat-conducting aluminum block is arranged between the adjacent PTC electric heating pipes, and the heat-conducting aluminum block is fitted with the outer diameter of the PTC electric heating pipe. The automatic thermostats are connected in series, which has the advantages of light weight, uniform heating and high heating efficiency.

Compared with the prior art, the effect of the utility model is positive and obvious. In the utility model, an integral heating plate structure is adopted, so that the heater itself has a good strength, which greatly reduces the heating of the PTC fins. At the same time, there are no gaps on both sides of the heating plate, so that the air passing through the heater can be heated evenly, which not only improves the heating effect, but also reduces the generation of water vapor inside the air-conditioning pipe. In addition, the heat dissipation area of the heater is greatly increased, thereby effectively improving the power performance of the PTC heater. Compared with the traditional electric bus PTC heater structure, under the same power requirement, the total amount of PTC heating ceramics required by the new heater is higher. few.

Description of drawings

Figure 1 is a structural diagram of the present utility model.

Figure 2 is a structural diagram of the heating plate of the present invention.

FIG. 3 is an internal installation structure diagram of the power control box of the present invention.

Detailed ways

Example:

As shown in Figure 1, Figure 2, Figure 3, a PTC fin heater, including a heating plate 4, a power control box 8, a temperature controller, is characterized in that, it also includes two axially disposed on the heating plate 4. The front plastic bracket 2 and the rear plastic bracket 6 of the end, the left and right sides of the heating plate 4 are respectively installed with protective strips 3, the heating plate 4 is provided with more than two hollow metal tubes 42, a plurality of fins 41 Interspersed and fixed on the above-mentioned hollow metal tube 42, the interior of the hollow metal tube 42 is correspondingly provided with the same number of PTC electric heating tubes 43, and a thermally conductive material is filled between the hollow metal tube 42 and the PTC electric heating tube 43, and the front plastic The bottom of the bracket 2 and the rear plastic bracket 6 are respectively installed with a front fixing plate 1 and a rear fixing plate 12, wherein the power control box 8 is installed on the outside of the rear plastic bracket 6, and a power control box 8 is arranged between the power control box 8 and the rear plastic bracket 6. The inner silicone pad 7 and the power control box 8 are provided with an electric heating tube through hole 61 that matches the outer diameter of the PTC electric heating tube 43 toward the heating plate 4, and the wire end of the PTC electric heating tube 43 extends through the electric heating tube through hole 61. into the power control box 8, a heat-conducting aluminum block 17 is arranged between every two adjacent PTC electric heating pipes 43, and the heat-conducting aluminum block 17 is matched with the outer diameter of the PTC electric heating pipe 43. The thermostat is composed of a manual thermostat 18 and an automatic thermostat 19 , and the manual thermostat 18 and the automatic thermostat 19 are respectively arranged on the left and right sides of the heat-conducting aluminum block 17 . Since the heating plate 4 with an integral structure has good strength, it does not need to be reinforced by a stainless steel frame. It is only necessary to set the protective strips 3 on both sides of the heating plate 4 to protect the fins 41 on the heating plate 4, so as to prevent them from being bumped. While the total weight of the PTC fin heater is greatly reduced, there is no longer a gap on both sides of the heating plate 4 .

Further, as shown in FIG. 1 and FIG. 3 , the outer side of the power supply control box 8 is provided with a power supply box front cover 10 , and the power supply box front cover 10 is connected to the power supply control box 8 by means of screws or snaps. There is an outer silicone pad 9 between the two, and a manual reset button 11 connected to the manual thermostat 18 is arranged on the surface of the front cover 10 of the power box. In addition, the surface of the front cover 10 of the power box is also provided with a small The low-voltage wire 14 is interspersed with the small wire 13 and the large wire 15. The low-voltage wire 14 is connected in series with the manual thermostat 18 and the automatic thermostat 19. The A high-voltage wire 16 is inserted through the large connector 15 , and the high-voltage wire 16 is connected to the PTC electric heating tube 43 in parallel.

Further, as shown in FIG. 3 , the thickness of the thermally conductive aluminum block 17 is greater than or equal to 3 mm, and the joint surface of the thermally conductive aluminum block 17 and the outer diameter of the PTC electric heating pipe 43 is set in a semicircular hole shape, And the joint surface of the thermally conductive aluminum block 17 and the PTC electric heating tube 43 and the manual thermostat 18 and the automatic thermostat 19 is coated with thermally conductive silica gel, the above measures can improve the thermal conductivity of the thermally conductive aluminum block 17 Efficiency, when any PTC electric heating tube 43 is overheated, the heat will be directly conducted to the manual thermostat 18 or the automatic thermostat 19 through the heat-conducting aluminum block 17, thereby triggering the over-temperature protection function of the thermostat.

Further, as shown in FIG. 1 , there are more than one bead connecting sheets 5 connected between the two guard bars 3, and the guard bar connecting sheets 5 are distributed in parallel and spaced along the length direction of the guard bars 3, Because the length of the protective strips 3 on both sides is long and easy to deform, the installed connecting pieces 5 are connected with the protective strips 3 on both sides to form an H shape, thereby improving the overall strength of the protective strips 3. In addition, the overall length of the heating plate 4 is longer. The longer the length of the connection piece 5 is, the more the number of the connecting pieces 5 is installed. The front fixing plate 1 and the rear fixing plate 12 are both made of metal and are used for connection and fixation with the bus roof.

Further, the PTC electric heating tube 43 is composed of PTC heating ceramics, dummy sheets, electrode sheets, wires, polyimide insulating films, silica gel plugs, and metal inner tubes.

Claims (6)

1. a PTC fin heater, comprising a heating plate, a power control box, a thermostat, is characterized in that, also comprises the front plastic support and the rear plastic support that are arranged on the axial ends of the heating plate, the heating plate Protective strips are installed on the left and right sides of the heating plate respectively, more than two hollow metal tubes are arranged in the heating plate, and a plurality of fins are inserted and fixed on the above hollow metal tubes, and the interior of the hollow metal tubes are correspondingly provided with the same A number of PTC electric heating tubes are filled with thermally conductive material between the hollow metal tube and the PTC electric heating tube, and a front fixing plate and a rear fixing plate are respectively installed at the bottoms of the front plastic bracket and the rear plastic bracket, and the outer side of the rear plastic bracket is installed with a In the power control box, an inner silicone pad is arranged between the power control box and the rear plastic bracket, and the side of the power control box facing the heating plate is provided with an electric heating tube through hole that matches the outer diameter of the PTC electric heating tube. The wire ends extend into the power control box through the electric heating tube through holes, and a heat-conducting aluminum block is arranged between every two adjacent PTC electric heating tubes, and the heat-conducting aluminum block matches the outer diameter of the PTC electric heating tube. , the temperature controller is composed of a manual temperature controller and an automatic temperature controller, and the manual temperature controller and the automatic temperature controller are respectively arranged on the left and right sides of the heat-conducting aluminum block. 2. A kind of PTC fin heater as claimed in claim 1, is characterized in that, the outer side of described power control box is provided with the front cover of power supply box, and the front cover of described power supply box is connected with the way of screw or buckle. The power control box is connected, and an outer silicone pad is arranged between the two. On the surface of the front cover of the power box, there is a manual reset button connected to the manual thermostat. In addition, the surface of the front cover of the power box is also provided with a small A low-voltage wire is interspersed inside the small wire, and the low-voltage wire is connected to the manual thermostat and the automatic thermostat in series, and the large wire is interspersed with a low-voltage wire. A high-voltage wire, the high-voltage wire is connected in parallel with the PTC electric heating tube. 3. The PTC fin heater according to claim 1 or 2, wherein the thickness of the thermally conductive aluminum block is greater than or equal to 3 mm, and the thermally conductive aluminum block is the same as the outer diameter of the PTC electric heating pipe. The joint surface to be attached is set in the shape of a semi-circular hole, and the joint surface of the thermally conductive aluminum block and the PTC electric heating tube, the manual thermostat and the automatic thermostat is coated with thermally conductive silica gel. 4. The PTC fin heater according to claim 1 or 2, wherein the guard strip is provided with guard strip connecting pieces at intervals, and the guard strip connecting pieces are horizontal and vertical to the guard strip , connect the two side guards together. 5. a kind of PTC fin heater as claimed in claim 1 or 2, is characterized in that, described PTC electric heating pipe is made of PTC heating ceramics, dummy sheet, electrode sheet, wire, polyimide insulating film, silica gel plug , and a metal inner tube. 6 . The PTC fin heater according to claim 1 , wherein the manual thermostat and the automatic thermostat are connected in series. 7 .

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