Fin type air-heating PTC (Positive Temperature Coefficient) heater

Abstract

The utility model belongs to a heating element, and particularly relates to a fin type air-heating PTC (Positive Temperature Coefficient) heater. A fin type air heating PTC heater comprises a shell and a heater body arranged in the shell, the heater body comprises a first fixing plate, a second fixing plate, a third fixing plate and a fourth fixing plate, a plurality of fins are arranged on one surface of the first fixing plate, a plurality of fins are arranged between the second fixing plate and the third fixing plate, and a plurality of fins are arranged on the other surface of the first fixing plate. A plurality of fins are arranged on one surface of the fourth fixing plate, the first fixing plate, the second fixing plate, the third fixing plate and the fourth fixing plate are arranged in parallel, PTC heating bodies are arranged between the first fixing plate and the second fixing plate, and PTC heating bodies are also arranged between the third fixing plate and the fourth fixing plate; the utility model designs the fin type PTC heater, the heater is formed by assembling a plurality of parts, brazing is not needed, the cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to a heating element, in particular to a fin-type air-heating PTC heater. Background Art

[0002] Most of the existing air-heating PTC heaters have heat dissipation fins that are stamped corrugated strips, which are then brazed to an aluminum sleeve, resulting in high processing costs. At the same time, the installation of the PTC heater and the heat dissipation fins requires pipe penetration and oil pressure, which has high requirements for equipment and processes, and there are problems with production and assembly difficulties. Summary of the invention

[0003] In view of the deficiencies in the prior art, the utility model designs an assembled fin-type air-heating PTC heater.

[0004] The technical solution of the utility model is as follows:

[0005] A fin-type air-heating PTC heater comprises a shell and a heater arranged in the shell, wherein the heater comprises a first fixed plate, a second fixed plate, a third fixed plate and a fourth fixed plate, a plurality of fins are arranged on one surface of the first fixed plate, a plurality of fins are arranged between the second fixed plate and the third fixed plate, a plurality of fins are arranged on one surface of the fourth fixed plate, the first fixed plate, the second fixed plate, the third fixed plate and the fourth fixed plate are arranged in parallel, a PTC heating element is arranged between the first fixed plate and the second fixed plate, and a PTC heating element is also arranged between the third fixed plate and the fourth fixed plate.

[0006] Furthermore, the upper and lower ends of the first fixing plate and the second fixing plate are respectively provided with C-shaped clips, and the upper and lower ends of the third fixing plate and the fourth fixing plate are respectively provided with C-shaped clips.

[0007] Furthermore, a negative ion generator is provided between the fins of the fourth fixing plate.

[0008] Furthermore, the ends of the first fixing plate, the second fixing plate, the third fixing plate and the fourth fixing plate, as well as the ends of the fins on the first fixing plate and the ends of the fins on the fourth fixing plate are coated with mica sheets.

[0009] Furthermore, the fins on the first fixing plate and the fins on the fourth fixing plate are arranged in an arc shape.

[0010] Furthermore, it also includes a fuse and a thermostat. A first installation space and a second installation space are provided between the plurality of fins of the first fixed plate. The fuse is arranged in the first installation space, and the thermostat is arranged in the second installation space. The two PTC heating elements are connected in parallel and then connected to the fuse, and the fuse and the thermostat are connected in series.

[0011] Furthermore, it also includes a first fixing block, which includes a holding portion for clamping the fuse, one end of the holding portion is connected to a fixing clip, and the fixing clip is connected to the fin.

[0012] Furthermore, it also includes a second fixed block, which includes a second fixed clamp that cooperates with the fin clamp, and the second fixed clamp is connected to an elastic connecting plate, and the other end of the elastic connecting plate is connected to a vertical guard, and the surface of the vertical guard and the elastic connecting plate are against the surface of the temperature controller.

[0013] Furthermore, a temperature sensor is included, and the temperature sensor is used to detect the temperature of the PTC heater.

[0014] In summary, the utility model has the following beneficial effects:

[0015] 1. The utility model designs a fin-type PTC heater, which is assembled from multiple parts and does not require brazing, thereby reducing costs and improving production efficiency.

[0016] 2. The utility model further adopts a C-shaped clamp for fixing, and a thermally conductive curing adhesive is provided between the PTC heater and the first fixing plate, the second fixing plate, the third fixing plate and the fourth fixing plate. After being clamped and fixed by the C-shaped clamp, the thermally conductive curing adhesive can fully fill the gap, thereby better improving the thermal conductivity efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the utility model (excluding the shell and mica sheet);

[0018] Figure 2 It is a front view schematic diagram of the utility model;

[0019] Figure 3 It is a cross-sectional perspective schematic diagram of the utility model (excluding the shell and the mica sheet);

[0020] Figure 4 It is a three-dimensional schematic diagram of the utility model;

[0021] In the figure, 1 is the first fixing plate, 2 is the second fixing plate, 3 is the third fixing plate, 4 is the fourth fixing plate, 5 is the fin, 6 is the PTC heating element, 7 is the C-type clip, 8 is the negative ion generator, 9 is the mica sheet, 10 is the fuse, 11 is the thermostat, 100 is the first installation space, 110 is the second installation space, 12 is the first fixing block, 120 is the retaining part, 121 is the fixing clip, 13 is the second fixing block, 130 is the second fixing clip, 131 is the elastic connecting plate, 132 is the vertical rib, 14 is the temperature sensor, 15 is the shell, and 16 is the heater. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0023] It should be noted that when an element is referred to as being "disposed on" or "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is referred to as being "fixed on" another element, or "fixedly connected" to another element, they may be fixed in a detachable manner or in a non-detachable manner. When an element is considered to be "connected" or "rotatably connected" to another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right", "upper", "lower" and similar expressions used are for illustrative purposes only and do not represent the only implementation method.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to restrict the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0025] The terms “first”, “second”, “third” and the like in the present invention do not represent specific quantities and orders, but are merely used to distinguish names.

[0026] See also Figures 1 to 4 As shown, the fin-type air-heating PTC heater includes a shell 15 and a heater 16 arranged in the shell 15. Specifically, the shell of the utility model includes an upper shell and a lower shell, which are connected together by snaps, and both ends of the shell are open, and airflow can enter from one end and flow out from the other end. The heater 16 includes a first fixed plate 1, a second fixed plate 2, a third fixed plate 3 and a fourth fixed plate 4. A plurality of fins 5 are provided on one surface of the first fixed plate 1, a plurality of fins 5 are provided between the second fixed plate 2 and the third fixed plate 3, and a plurality of fins 5 are provided on one surface of the fourth fixed plate 4. The first fixed plate 1, the second fixed plate 2, the third fixed plate 3 and the fourth fixed plate 4 are arranged in parallel, a PTC heater 6 is provided between the first fixed plate 1 and the second fixed plate 2, and a PTC heater 6 is also provided between the third fixed plate 3 and the fourth fixed plate 5.

[0027] The utility model improves the PTC heater, which is assembled from a plurality of units. During the assembly process, the PTC heating element is clamped and arranged between fixed plates. Firstly, the PTC heating form is safer than resistive heating. Secondly, each unit includes a fixed plate and fins. The fins and the fixed plate are integrally formed by extruding a profile without brazing, thereby reducing the cost of the product. The PTC heating element is bonded to the first fixed plate, the second fixed plate, the third fixed plate and the fourth fixed plate by means of heat-conducting fixing glue.

[0028] Furthermore, C-type clamps 7 are respectively provided at the upper and lower ends of the first fixed plate 1 and the second fixed plate 2, and C-type clamps 7 are respectively provided at the upper and lower ends of the third fixed plate 3 and the fourth fixed plate 4. The provided C-type clamps clamp and fix the first fixed plate and the second fixed plate as well as the third fixed plate and the fourth fixed plate at both ends to facilitate installation, and also pressurize the thermally conductive curing adhesive so that the thermally conductive curing adhesive can fully fill the gap between the PTC heating body and the fixed plate, thereby improving the thermal conductivity efficiency.

[0029] Furthermore, a negative ion generator 8 is provided between the plurality of fins 5 of the fourth fixed plate 4. The utility model reserves an installation position for the negative ion generator between the fins of the fourth fixed plate, so that the user can add / remove the negative ion generator according to needs without re-opening the mold.

[0030] Furthermore, mica sheets 9 are coated along the ends of the first fixed plate 1, the second fixed plate 2, the third fixed plate 3 and the fourth fixed plate 4, as well as the ends of the fins 5 on the first fixed plate 1 and the ends of the fins 5 on the fourth fixed plate 4. The mica sheets coat the outer peripheral surface to improve the integrity of the peripheral surface and also have a heat-insulating effect to avoid damage to the heater and the shell.

[0031] Furthermore, the fins on the first fixing plate 1 and the fins on the fourth fixing plate 4 are arranged in an arc shape, and the arc arrangement is adopted to meet the usage requirements of the usage scenario.

[0032] Furthermore, it also includes a fuse 10 and a thermostat 11. A first installation space 100 and a second installation space 110 are provided between several fins of the first fixed plate 1. The fuse 10 is arranged in the first installation space 100, and the thermostat 11 is arranged in the second installation space 110. The two PTC heaters are connected in parallel and then connected to the fuse. The fuse and the thermostat are connected in series. The two PTC heaters can be turned on separately. The fuse and the thermostat serve as protection devices. When a large current occurs, the fuse blows and the product stops working due to power failure. If the thermostat detects that the surface temperature of the air-heating PTC heater is too high, the thermostat will disconnect the circuit to stop the PTC heater from working. When the thermostat detects that the surface temperature of the air-heating PTC heater returns to normal, the circuit will be connected and the PTC heater will continue to work.

[0033] Furthermore, it also includes a first fixed card block 12, which includes a retaining portion 120 for clamping the fuse, one end of the retaining portion 120 is connected to a fixing clip 121, the fixing clip 121 is connected to the fin, and the fixing clip is clamped on the fin so that the first fixed card block and the fin have a fixed and reliable connection relationship, and the retaining portion is used to clamp the fuse.

[0034] Furthermore, it also includes a second fixed block 13, which includes a second fixed clamp 130 that cooperates with the fin clamp, and the second fixed clamp 130 is connected to an elastic connecting plate 131, and the other end of the elastic connecting plate 131 is connected to a vertical rib 132, the surface of the vertical rib and the elastic connecting plate are against the surface of the thermostat, and the elastic connecting plate applies a force to the thermostat to make the thermostat fit tightly on the fin and the fixed plate, and the vertical rib limits the thermostat in one direction, and the second fixed clamp is fixed to the fin clamp, thereby realizing the fixation of the thermostat and the fin, and the above-mentioned first fixed block and second fixed block respectively realize the fixation of the fuse and the thermostat, and there is no need to use screws to fasten, so it is easy to install.

[0035] Furthermore, it also includes a temperature sensor 14, which is used to detect the temperature of the PTC heater. Specifically, the temperature sensor is used to detect the outlet temperature and transmit the temperature signal to the control end to facilitate the control of the outlet temperature. The shell is provided with a column to support the temperature sensor.

[0036] In summary, the utility model has the following beneficial effects:

[0037] 1. The utility model designs a finned PTC heater, which is assembled from multiple parts and does not require brazing, thereby reducing costs and improving production efficiency.

[0038] 2. The utility model further adopts a C-shaped clamp for fixing, and a thermally conductive curing adhesive is provided between the PTC heater and the first fixing plate, the second fixing plate, the third fixing plate and the fourth fixing plate. After being clamped and fixed by the C-shaped clamp, the thermally conductive curing adhesive can fully fill the gap, thereby better improving the thermal conductivity efficiency.

[0039] Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

Claims

1. A fin-type air-heating PTC heater, comprising a housing and a heater arranged in the housing, characterized in that: The heater includes a first fixed plate, a second fixed plate, a third fixed plate and a fourth fixed plate, a plurality of fins are provided on one surface of the first fixed plate, a plurality of fins are provided between the second fixed plate and the third fixed plate, a plurality of fins are provided on one surface of the fourth fixed plate, the first fixed plate, the second fixed plate, the third fixed plate and the fourth fixed plate are arranged in parallel, a PTC heater is provided between the first fixed plate and the second fixed plate, and a PTC heater is also provided between the third fixed plate and the fourth fixed plate.

2. The fin-type air-heating PTC heater according to claim 1 is characterized in that: The upper and lower ends of the first fixing plate and the second fixing plate are respectively provided with C-shaped clips, and the upper and lower ends of the third fixing plate and the fourth fixing plate are respectively provided with C-shaped clips.

3. The fin-type air-heating PTC heater according to claim 1 is characterized in that: A negative ion generator is arranged between the fins of the fourth fixing plate.

4. The fin-type air-heating PTC heater according to any one of claims 1 to 3, characterized in that: Ends of the first fixing plate, the second fixing plate, the third fixing plate and the fourth fixing plate and ends of the fins on the first fixing plate and the fourth fixing plate are coated with mica sheets.

5. The fin-type air-heating PTC heater according to claim 4 is characterized in that: The fins on the first fixing plate and the fins on the fourth fixing plate are arranged in an arc shape.

6. The fin-type air-heating PTC heater according to claim 5 is characterized in that: It also includes a fuse and a thermostat. A first installation space and a second installation space are provided between the fins of the first fixing plate. The fuse is arranged in the first installation space, and the thermostat is arranged in the second installation space. The two PTC heating elements are connected in parallel and then connected to the fuse, and the fuse and the thermostat are connected in series.

7. The fin-type air-heating PTC heater according to claim 6 is characterized in that: It also includes a first fixing block, which includes a holding portion for clamping the fuse, one end of the holding portion is connected to a fixing clip, and the fixing clip is connected to the fin.

8. The fin-type air-heating PTC heater according to claim 7 is characterized in that: It also includes a second fixed block, which includes a second fixed clamp that cooperates with the fin clamp, the second fixed clamp is connected to an elastic connecting plate, the other end of the elastic connecting plate is connected to a vertical guard, and the surface of the vertical guard and the elastic connecting plate are against the surface of the temperature controller.

9. The fin-type air-heating PTC heater according to claim 8, characterized in that: The device also includes a temperature sensor, which is used to detect the temperature of the PTC heater.

Images