Temperature control box of heat-conducting PTC (Positive Temperature Coefficient) heater

Abstract

The utility model provides a heat conduction PTC heater temperature control box, which comprises a bottom plate and an upper cover, the upper cover and the bottom plate form a cavity capable of accommodating a temperature controller, one side surface of the formed cavity is provided with a wire outlet along the wire outlet direction of the temperature controller, the upper plane of the upper cover is provided with a clamp spring fixing groove, and the clamp spring fixing groove is provided with a clamp spring. The bottom plate, the upper cover and the PTC heater radiating strips are fixed through clamp springs, a heat conduction part is arranged on the face, opposite to the face where the temperature controller is installed, of the bottom plate, the heat conduction part extends and is inserted into gaps of the PTC heater radiating strips in a penetrating mode, and heat on the radiating strips is rapidly transmitted to the temperature controller. Compared with the prior art, the temperature control box has the beneficial effects that the heat conduction part is arranged on the mounting bottom plate of the temperature control box, and the heat conduction part is inserted into the gaps of the heat dissipation strips of the PTC heater, so that the heat of the PTC heater is quickly transferred to the bottom plate of the temperature control box, and the temperature controller mounted on the bottom plate can quickly sense the temperature change; therefore, the sensitivity of the temperature controller is improved.

Description

Technical Field

[0001] The utility model relates to the field of physics, in particular to a heating device, specifically a temperature control box of a heat-conducting PTC heater. Background Art

[0002] The main function of the thermostat box currently used with PTC heaters is to secure and protect the thermostat. However, another particularly important function of the thermostat box is to ensure that the temperature sensed by the thermostat is as close as possible to the temperature of the PTC heater to ensure thermostat sensitivity. Therefore, the surface of the thermostat box where the thermostat is mounted needs to be close to the PTC heater and able to quickly transfer the heater's temperature to the thermostat. However, the thermostat mounting surface of existing technologies is generally placed in close contact with the outer plate-like surface of the PTC heater's heat sink, transferring heat through surface contact. However, when the heat sink has no plate-like surface on the outside, the thermostat mounting surface and the heat sink have only a few linear contacts, resulting in slow heat transfer, poor thermostat sensitivity, and a long take-off time, which seriously affects the thermostat's sensitivity. Therefore, a thermally conductive thermostat box suitable for applications without a plate-like surface on the outside of the heat sink is needed to quickly transfer heat to the thermostat and improve thermostat sensitivity. Utility Model Content

[0003] In order to solve the above problems, the present invention provides a thermal conductive PTC heater temperature control box, which is dedicated to improving the sensitivity of the thermostat. The present invention provides the following technical solutions:

[0004] A heat-conducting PTC heater temperature control box includes a base plate and an upper cover. The upper cover and the base plate form a chamber that can accommodate the thermostat. A side of the formed chamber is provided with an outlet along the outlet direction of the thermostat. The upper plane of the upper cover is provided with a retaining spring fixing groove. The base plate, the upper cover and the PTC heater heat dissipation strip are fixed with retaining springs. A heat conducting part is provided on the opposite side of the base plate where the thermostat is mounted. The heat conducting part extends and penetrates into the gap of the heat dissipation strip of the PTC heater to quickly transfer the heat of the heat dissipation strip to the thermostat.

[0005] Furthermore, the heat-conducting part is provided with a fin groove matching the shape of the heat sink, and the two extended surfaces of the fin groove are consistent with the inclination angle of the heat sink fin, and the bottom surface of the fin groove and the top surface of the fin of the heat sink are also set as fitting surfaces. The clamping structure of the retaining spring presses the heat sink, the temperature control box cover and the bottom plate at the same time, clamping the three together.

[0006] Furthermore, an insulating layer is provided between the temperature controller and the base plate.

[0007] Furthermore, the insulating layer may also be formed by adhering an insulating film to the mounting surface of the base plate.

[0008] Furthermore, a pre-tightening structure is provided just above the thermostat in the upper cover cavity to pre-press the thermostat onto the bottom plate, so that the bottom surface of the thermostat fits more closely with the mounting surface of the bottom plate.

[0009] Furthermore, a hook is provided at one end of the retaining spring to buckle the upper cover, and a clamping structure with a bending arc is provided at the other end.

[0010] Furthermore, the bottom plate (11) is made of an aluminum alloy material having good thermal conductivity.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: a heat conducting part is provided on the mounting base plate of the temperature control box, and the heat conducting part is inserted into the heat dissipation strip of the PTC heater, so that the heat of the PTC heater is quickly transferred to the base plate of the temperature control box, so that the thermostat installed on the base plate can quickly sense the temperature change, thereby improving the sensitivity of the thermostat. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0013] Figure 1 A diagram showing the installation of a PTC heater temperature control box and a PTC heater that can conduct heat.

[0014] Figure 2 A schematic diagram of the explosion of a thermally conductive PTC heater temperature control box

[0015] Figure 3 A schematic diagram of the bottom plate of a thermally conductive PTC heater temperature control box

[0016] Figure 4 A schematic diagram of the upper cover of a thermally conductive PTC heater temperature control box

[0017] Figure 5 A schematic diagram of a thermally conductive PTC heater temperature control box spring

[0018] 1—Thermostat box; 2—PTC heater; 21—Heat dissipation strip; 11—Base plate; 111—Heat conduction portion; 111A—Fin slot; 111a—Fin slot bottom; 111b, 111c—Fin slot extension surfaces; 112—Base plate mounting surface; 12—Upper cover; 121—Wire outlet; 122—Circlip fixing slot; 123—Insulation sheet retaining slot; 124—Thermostat pre-tightening structure; 14—Circlip; 141—Hook; 142—Clamping structure. DETAILED DESCRIPTION

[0019] Exemplary embodiments of the present application will be described in detail below with reference to the attached drawings. The same reference numbers in different drawings denote the same or similar elements throughout the several disclosed embodiments. While aspects of the embodiments are illustrated with reference to the attached drawings, it is to be understood that no one drawing need be construed as limiting the order of the aspects, unless such order is explicitly indicated by reference herein, and no single figure is necessarily indicative of the entire disclosure.

[0020] Wherein, it needs to be understood that the terms "inner", "outer", "front", "back", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model or simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0021] The design will be further described below in combination with the structural description of the drawings.

[0022] As Figures 1-2 A heat-conducting PTC heater temperature control box, comprising a bottom plate 11, an upper cover 12, the upper cover 12 and the bottom plate 11 form a cavity capable of accommodating a temperature controller 13, the side of the formed cavity is provided with a wire outlet 121 along the wire outlet direction of the temperature controller 13, the top surface of the upper cover 12 is provided with a fixing groove 122, the bottom plate 11, the upper cover 12, and the PTC heater heat dissipation strip 21 are fixed by a clamp spring 14, the opposite surface of the bottom plate 11 installed with the temperature controller is provided with a heat-conducting part 111, the heat-conducting part 111 extends into the heat dissipation strip 121 of the PTC heater, and the heat of the heat dissipation strip 21 is quickly transmitted to the temperature controller.

[0023] As Figure 3 Further preferably, in order to ensure the heat-conducting performance of the heat-conducting part, the material of the heat-conducting part is an aluminum alloy with good heat-conducting performance, and a fin groove 111A matching the shape of the heat dissipation strip is arranged on the heat-conducting part 111, the extension surfaces 111b and 111c of the fin groove are consistent with the inclination angles of the fins of the PTC heater heat dissipation strip, so that the two surfaces are more closely attached, the heat-conducting efficiency is improved, and the bottom 111a of the fin groove and the top surface of the fin 21 of the heat dissipation strip are also provided as an attachment surface. In addition to heat conduction, the attachment surface also has a fixing effect. The bending arc apex 142 of the clamp spring falls on this surface, and the upper cover, the bottom plate, and the heat dissipation strip of the temperature control box are clamped together.

[0024] As Figure 2 Further preferably, in order to improve the insulation performance, an insulation layer 15 is arranged between the temperature controller 13 and the bottom plate 11. The insulation layer can be an insulation sheet, and the side wall of the upper cover is provided with an insulation sheet mounting groove 123. During installation, the insulation sheet is inserted into the groove. Alternatively, the insulation layer can also be an insulation film directly attached to the mounting surface of the bottom plate.

[0025] As Figure 4, further preferably, in order to improve the transmission efficiency, a pre-tightening structure 122 is provided just above the thermostat in the upper cover cavity, pressing the thermostat onto the bottom plate 11 so that the bottom surface of the thermostat is more closely fitted to the mounting surface 112 of the bottom plate 11.

[0026] like Figure 5 , further preferably, the clamping spring 14 is provided with a hook 141 to buckle the upper cover 12. In order to ensure that the clamping spring 14 does not scratch the surface of the heat dissipation bar 21 while clamping the heat dissipation bar 21, the clamping spring 14 is provided with a vertex 142 with a bending arc.

[0027] More preferably, in order to improve the heat transfer efficiency, the bottom plate 11 is made of aluminum alloy material with good thermal conductivity.

[0028] While the embodiments of the present application have been described above, the foregoing description is intended to be illustrative, non-exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to the technology in the marketplace, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A thermally conductive PTC heater temperature control box, comprising a base plate (11) and an upper cover (12), wherein the upper cover (12) and the base plate (11) form a chamber capable of accommodating a thermostat (13), and a side surface of the formed chamber is provided with a wire outlet (121) along the wire outlet direction of the thermostat (13), characterized in that: A retaining spring fixing groove (122) is provided on the upper plane of the upper cover (12), and the base plate (11), the upper cover (12) and the heat dissipation strip (21) of the PTC heater (2) are fixed by a retaining spring (14). A heat conducting portion (111) is provided on the opposite surface of the base plate (11) on which the thermostat (13) is mounted, and the heat conducting portion (111) extends and penetrates into the gap of the heat dissipation strip (121) of the PTC heater (2), thereby quickly transferring the heat on the heat dissipation strip (21) to the thermostat (13).

2. The thermally conductive PTC heater temperature control box according to claim 1, characterized in that: The heat conducting portion (111) is provided with a fin groove 111A matching the shape of the heat dissipating strip (21), and the extension surfaces 111b and 111c of the fin groove 111A are consistent with the inclination angle of the fin of the heat dissipating strip (21), and the bottom surface 111a of the fin groove and the top surface (21) of the fin of the heat dissipating strip are also provided as fitting surfaces. The clamping structure (142) of the clamping spring simultaneously presses the heat dissipating strip (21), the upper cover (12) of the temperature control box and the bottom plate (11), thereby clamping and fixing the three together.

3. The temperature control box for a thermally conductive PTC heater according to claim 2, characterized in that: An insulating layer (15) is provided between the temperature controller (13) and the base plate (11).

4. The temperature control box for a thermally conductive PTC heater according to claim 3, characterized in that: The insulating layer (15) is made of an insulating sheet, and the side wall of the upper cover (12) is provided with an insulating sheet mounting groove (123).

5. The temperature control box for a thermally conductive PTC heater according to claim 3, characterized in that: The insulating layer (15) is attached to the mounting surface (112) of the base plate (11) using an insulating film.

6. The temperature control box for a thermally conductive PTC heater according to claim 4, characterized in that: A pre-tightening structure 122 is provided just above the thermostat in the chamber of the upper cover (12) to pre-press the thermostat onto the bottom plate (11) so that the bottom surface of the thermostat fits more closely with the bottom plate mounting surface (112).

7. The temperature control box for a thermally conductive PTC heater according to claim 6, characterized in that: A hook (141) is provided at one end of the clamping spring (14) to buckle the upper cover (12), and a clamping structure (142) with a bending arc is provided at the other end.

8. A temperature control box for a thermally conductive PTC heater according to any one of claims 1 to 7, characterized in that: The bottom plate (11) is made of aluminum alloy material with good thermal conductivity.

Images