CN204859579U - Heat dissipation base member and canned type PTC thermistor heater - Google Patents

Abstract

The utility model discloses a heat dissipation base member and canned type PTC thermistor heater, the base member that should dispel the heat are used for holding PTC the heating element, the positive pressure or negative pressure device comprises a cavity, the cavity has an edge the hollow chamber that holds that cavity length direction extends, be fixed with a plurality of radiating fin on the top of cavity and the surface of bottom respectively between two parties, every radiating fin follows cavity width direction's length is less than the width of cavity, hold the intracavity be equipped with an edge on the left side inner wall of cavity and the right side inner wall respectively the location muscle that cavity length direction extends, article two the location muscle closely spaced in radiating fin follows cavity width direction's length, every radiating fin's shape is the convex -concave relief fabric. Canned type PTC thermistor heater contains heat dissipation base member and holding at the PTC the heating element of heat dissipation in the base member. The utility model discloses can the long term operation, no electrical safety hidden danger.

Description

A kind of heat dissipation base and closed type PTC thermistor heater

Technical field

The utility model relates to a kind of thermistor heater, particularly relates to a kind of heat dissipation base and closed type PTC (PositiveTemperatureCoefficient, positive temperature coefficient) thermistor heater.

Background technology

Positive temperature coefficient (PositiveTemperatureCoefficient, being called for short PTC) thermistor heater is due to the characteristic of its uniqueness, make it have automatic constant-temperature, the flames of anger, long service life, affect little, electric conversion rate high by mains fluctuations, be widely used in the electrical apparatus industries such as warm-air drier, dryer, water heater, air conditioner.

Existing ptc heater, its structure as shown in Figure 1, there is following shortcoming: 1, its radiating fin is processed into plate shaped curved surface, this radiating fin is bad in intensity and rigidity, radiating fin easily lodges, and easily causes fin mutually to stick together, and causes ventilation not smooth, certain windage can be produced thus, and easily laying dust fouling on fin.2, nothing structure of locating placed in the middle in container cavity, easily make PTC heater element not placed in the middle, and near aluminum pipe two side, when both sides applying pressure makes aluminum pipe compress distortion, PTC heater element can be subject to rigid pressure, cause PTC heater element easily to crush, thus cause quality hidden danger, bring the worry of quality aspect to user.

Summary of the invention

In order to make up the deficiencies in the prior art, the utility model provides a kind of heat dissipation base and closed type PTC thermistor heater, and it can long-term work, without electrical safety hidden danger.

A kind of heat dissipation base, for holding PTC heat generating component, comprise cavity, described cavity has the container cavity of the hollow that one extends along described cavity length direction, the top of described cavity and the outer surface of bottom are fixed with some radiating fins respectively between two parties, and each described radiating fin is less than the width of described cavity along the length in described housing width direction; The inner left wall of the described cavity in described container cavity and right side inwall are respectively equipped with a positioning bar extended along described cavity length direction; Article two, the spacing of described positioning bar is less than the length of described radiating fin along described housing width direction, and the shape of each described radiating fin is convex-concave relief fabric.

In above technical scheme, two positioning bar common guarantee PTC heat generating components can be positioned in container cavity between two parties, and when suppressing cavity, PTC heat generating component not easily crushes, and works safer; Be convex-concave relief fabric by the profile design of radiating fin, namely the surface of radiating fin is that concave, convex is alternately arranged, such as, can be waveform curved surface, zigzag curved surface, trapezoidal curved surface etc. simultaneously.This ups and downs structure not only increases area of dissipation, improves radiating efficiency; Can also play the effect of reinforcement to radiating fin, thus strengthen the Rigidity and strength of radiating fin, in the course of the work, radiating fin not easily lodges, thus can solve in prior art because radiating fin lodges the series of problems caused; And because of its intensity and good rigidly, fin machining can be allowed under the condition of equal area of dissipation to become thinner, manufacture of materials cost is greatly reduced, saves material.

Preferably, some described radiating fins are parallel and equidistantly arrange.

Preferably, described cavity is cuboid, and the described positioning bar on the inner left wall of described cavity and right side inwall is symmetrical arranged.

Preferably, described heat dissipation base is formed in one structure.

Preferably, the material of described heat dissipation base is aluminium section bar.

Preferably, the left side of described cavity and outer right wall are respectively the V-type groove to described container cavity sunken inside, U-type groove or the W type groove that extend along described cavity length direction.

Owing to having above technical scheme, add man-hour in use diel to cavity, receiving cavity is internally out of shape and is shunk, and can ensure that PTC heat generating component better contacts with container cavity, thus improves heat transfer efficiency.

Preferably, low and two ends are high in the middle of the inner surface at the top of the described cavity that the end face of described PTC heat generating component is corresponding, high and two ends are low in the middle of the inner surface of the bottom of the described cavity that the bottom surface of described PTC heat generating component is corresponding.

Owing to having above technical scheme, when suppressing heat dissipation base, the rigid pressure that PTC heat generating component can be made to be subject to aluminum pipe reduces, thus reduces the destruction to PTC heat generating component.

A kind of closed type PTC thermistor heater, comprise described heat dissipation base, PTC heat generating component and moisture proof seal, described PTC heat generating component is also pressed in described container cavity between two parties between two described positioning bars, and the two ends of the described container cavity of described heat dissipation base are respectively equipped with a described moisture proof seal.

Preferably, described PTC heat generating component comprises PTC thermistor, for being connected two electrode terminals, metal electrode board and insulating barriers being energized and making described PTC thermistor generate heat with external power source, the upper surface of described PTC thermistor and lower surface are close to one piece of described metal electrode board respectively, two described electrode terminals are positioned at the same side of described PTC thermistor and are connected with described metal electrode board respectively, described insulating barrier is coated on the periphery of described metal electrode board, and two described electrode terminals stretch out from described moisture proof seal.

Preferably, described moisture proof seal is the waterproof insulation fluid sealant that effectively can intercept water.

Accompanying drawing explanation

Fig. 1 is the structural representation of ptc heater of the prior art;

Fig. 2 is the perspective view of the heat dissipation base of the utility model embodiment one;

Fig. 3 is the schematic side view of Fig. 2;

Fig. 4 is the perspective view of the closed type PTC thermistor heater in the utility model embodiment two;

Fig. 5 is the decomposing schematic representation in Fig. 4;

Fig. 6 is the perspective view of the closed type PTC thermistor heater in the utility model embodiment three.

Embodiment

The utility model provides a kind of heat dissipation base, and this heat dissipation base is for holding PTC heat generating component, and below by way of preferably embodiment, the utility model is elaborated.

Embodiment one

As shown in Figure 2, this heat dissipation base 1 comprises cavity 11, cavity 11 is cuboid, there is the container cavity 12 of the hollow that one extends along cavity length direction, the top of cavity 11 and the outer surface of bottom are fixed with some radiating fins 13 respectively between two parties, the length along cavity 11 Width of the radiating fin 13 of the outer surface at the top of cavity is less than the width at the top of cavity 11, and the length along cavity 11 Width of the radiating fin 13 of the outer surface in the bottom of cavity is less than the width of the bottom of cavity 11.The inner left wall of the cavity in container cavity 12 and right side inwall are respectively equipped with positioning bar 14, two positioning bars 14 extended along cavity length direction to be symmetrical arranged.Article two, the spacing between positioning bar 14 is less than the length of radiating fin 13 along cavity 11 Width, the left side of cavity and outer right wall are respectively the V-type groove 15 to described container cavity sunken inside extended along cavity length direction, like this when suppressing heat dissipation base, the impact on PTC heat generating component can be reduced as much as possible.

Be all parallel at cavity top with the radiating fin 13 of bottom and equidistantly arrangement, the shape of radiating fin is convex-concave relief fabric, and in this example, the surface of radiating fin is waveform curved surface.Heat dissipation base is formed in one structure, and material is aluminium section bar, and particularly cavity, radiating fin and positioning bar are integrally processed by aluminium section bar, and radiating fin is processed by machining tool backing-off cutting.

As shown in Figure 3, the centre 111 of the inner surface at the top of the cavity 11 that the end face of PTC heat generating component is corresponding is low and two ends 112 high, and in the middle of the inner surface of the bottom of the cavity 11 that the bottom surface of PTC heat generating component is corresponding, 113 is high and two ends 114 are low.

Embodiment two

As shown in Figures 4 and 5, the utility model also provides a kind of closed type PTC thermistor heater, comprise the heat dissipation base 1 in embodiment one, PTC heat generating component 2 and moisture proof seal 3, PTC heat generating component 2 is also pressed between two parties in container cavity between two positioning bars 14, and the two ends of the container cavity of heat dissipation base 1 are respectively equipped with a moisture proof seal 3, wherein, PTC heat generating component 2 comprises PTC thermistor 21, for being connected two electrode terminals 22 being energized and making PTC thermistor 21 generate heat with external power source, metal electrode board 23 and insulating barrier 24, the upper surface of PTC thermistor 21 and lower surface are close to one piece of metal electrode board 23 respectively, metal electrode board 23 provides operating voltage for PTC thermistor 21, two electrode terminals 22 are positioned at the same side of PTC thermistor, wire connecting power is passed through in one end of electrode terminal 22, the other end is connected with metal electrode board 23 (by riveting or being welded and fixed), the voltage that metal electrode board 23 can be made like this to obtain power supply provide, and together with PTC thermistor 21 built-up circuit loop.Insulating barrier 24 is coated on the periphery of metal electrode board 23, and two electrode terminals 22 stretch out from moisture proof seal 3, and moisture proof seal 3 is the waterproof insulation fluid sealant that effectively can intercept water, and container cavity is closed completely.

Embodiment three

Be from the different of embodiment one, as shown in Figure 6, the shape of the radiating fin on heat dissipation base is zigzag curved surface.

Above content is in conjunction with concrete preferred implementation further detailed description of the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field; without departing from the concept of the premise utility; some simple deduction or replace can also be made; such as change fin shape into trapezoidal curved surface, all should be considered as belonging to the scope of patent protection that claims that the utility model submits to are determined.

Claims (10)

1. a heat dissipation base, for holding PTC heat generating component, it is characterized in that, comprise cavity, described cavity has the container cavity of the hollow that one extends along described cavity length direction, the top of described cavity and the outer surface of bottom are fixed with some radiating fins respectively between two parties, and each described radiating fin is less than the width of described cavity along the length in described housing width direction; The inner left wall of the described cavity in described container cavity and right side inwall are respectively equipped with a positioning bar extended along described cavity length direction; Article two, the spacing of described positioning bar is less than the length of described radiating fin along described housing width direction, and the shape of each described radiating fin is convex-concave relief fabric.

2. heat dissipation base as claimed in claim 1, is characterized in that: some described radiating fins are parallel and equidistantly arrange.

3. heat dissipation base as claimed in claim 1, is characterized in that: described cavity is cuboid, and the described positioning bar on the inner left wall of described cavity and right side inwall is symmetrical arranged.

4. heat dissipation base as claimed in claim 1, is characterized in that: described heat dissipation base is formed in one structure.

5. heat dissipation base as claimed in claim 1, is characterized in that: the material of described heat dissipation base is aluminium section bar.

6. heat dissipation base as claimed in claim 1, is characterized in that: the left side of described cavity and outer right wall are respectively the V-type groove to described container cavity sunken inside, U-type groove or the W type groove that extend along described cavity length direction.

7. heat dissipation base as claimed in claim 1, it is characterized in that: low and two ends are high in the middle of the inner surface at the top of the described cavity that the end face of described PTC heat generating component is corresponding, high and two ends are low in the middle of the inner surface of the bottom of the described cavity that the bottom surface of described PTC heat generating component is corresponding.

8. a closed type PTC thermistor heater, it is characterized in that: comprise the heat dissipation base described in claim 1-7 any one, PTC heat generating component and moisture proof seal, described PTC heat generating component is also pressed in described container cavity between two parties between two described positioning bars, and the two ends of the described container cavity of described heat dissipation base are respectively equipped with a described moisture proof seal.

9. closed type PTC thermistor heater as claimed in claim 8, it is characterized in that: described PTC heat generating component comprises PTC thermistor, for being connected two electrode terminals being energized and making described PTC thermistor generate heat with external power source, metal electrode board and insulating barrier, the upper surface of described PTC thermistor and lower surface are close to one piece of described metal electrode board respectively, two described electrode terminals are positioned at the same side of described PTC thermistor and are connected with described metal electrode board respectively, described insulating barrier is coated on the periphery of described metal electrode board, two described electrode terminals stretch out from described moisture proof seal.

10. closed type PTC thermistor heater as claimed in claim 8 or 9, is characterized in that: described moisture proof seal is the waterproof insulation fluid sealant that effectively can intercept water.