CN215773610U

CN215773610U - Bracket of PTC heater

Info

Publication number: CN215773610U
Application number: CN202121977614.7U
Authority: CN
Inventors: 曹黎霞
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-08-20
Filing date: 2021-08-20
Publication date: 2022-02-08
Anticipated expiration: 2031-08-20

Abstract

The utility model belongs to the technical field of PTC heating, and particularly relates to a PTC heater and a bracket. Aiming at the defect that the PTC heater with the existing thermal circuit breaker, the connector and the lead arranged at the same end does not have a proper bracket, the utility model adopts the following technical scheme: a bracket for a PTC heater, comprising: a frame having a first housing portion and a second housing portion in a height direction, the first housing portion having a first housing ring in which a thickness direction positioning structure and a width direction positioning structure are formed, the second housing portion having a second housing ring and a rear sealing plate; the cover plate is arranged on the second accommodating part of the frame, the front end of the second accommodating part is covered by the cover plate, a lead-out hole for a lead to penetrate out is formed in the cover plate, and the cover plate is provided with a height positioning block which is abutted to a pressing plate of the PTC heater along the height direction. The bracket of the PTC heater can fix the main body of the PTC heater and the bracket through two parts.

Description

Bracket of PTC heater

Technical Field

The utility model belongs to the technical field of PTC heating, and particularly relates to a bracket of a PTC heater.

Background

The existing PTC heater (also called as PTC heating element) is mostly composed of a galvanized outer pressing plate, a stainless steel corrugated spring sheet, a galvanized inner pressing plate, a PTC heating sheet, a nickel-plated copper electrode terminal, a PPS high-temperature plastic electrode sheath and the like. The existing PTC heater adopts corrugated radiating fins, improves the radiating rate, integrates the advantages of adhesion and mechanical type, fully considers various thermal and electrical phenomena of a PTC heating piece during working, and has strong binding force, excellent heat conduction and radiating performance, high efficiency, safety and reliability. The PTC heater has the prominent characteristic of safety performance, namely, when the fan stops due to failure, the power of the PTC heater can automatically and rapidly reduce because the PTC heater cannot fully dissipate heat, and the surface temperature of the heater is maintained at about Curie temperature (generally about 250 ℃), so that the surface of the heater such as an electric heating tube heater cannot be reddened.

In the application of the PTC heating sheet, when the wind speed is zero, the temperature of the heating body will rise, and other parts of the equipment can be greatly damaged. Therefore, when the PTC heating sheet is used as a heating element, a high-temperature-resistant bracket must be installed, and a certain reasonable installation space is ensured, so that the PTC heating sheet has a sufficient heat dissipation space. In addition, when the PTC heater is applied to an air conditioner or the like, it is also required to occupy as small a space as possible.

In a conventional PTC heater (including a heater main body and a bracket), the heater main body has a structure shown in fig. 1: the connecting terminals are arranged between every two groups of PTC heating sheets for connecting a power supply, the distance between the two connecting terminals is the sum of the thickness of two metal radiators and the thickness of one PTCR, and the distance is generally less than 20 mm. However, the size of the thermal cut-out is not less than 34 mm. Therefore, the distance between the two terminals is not sufficient to accommodate the thermal cut-out, which must be placed on the other side. Because the thermal circuit breaker is located the opposite side, need increase parts such as wire and connect the thermal circuit breaker of remote department in the circuit of PTCR heater like this, lead to the structure complicacy, the contact point of heavy current increases, increases the potential safety hazard.

Therefore, the chinese utility model with publication number CN213026581U discloses a connector, a thermal circuit breaker and a PTC heater, which are provided at the same end with the thermal circuit breaker, the connector and the lead wires, so as to reduce the number of electrical connections and make the structure compact.

However, there is no support suitable for the PTC heater (whether the PTC heating elements of each group are connected in parallel, in series, or in a mixture of series and parallel) or other similar PTC heaters disclosed in the above utility model in which the thermal cut-out, the connector, and the lead are provided at the same end. In addition, the electrode terminals of the conventional PTC heater are insulated by PPS high-temperature plastic electrode sheaths, so that the conventional PTC heater has more parts, complex assembly and larger volume.

Disclosure of Invention

The utility model provides a bracket of a PTC heater, aiming at the defect that the traditional PTC heater with a thermal circuit breaker, a connector and a lead arranged at the same end does not have a proper bracket, so as to achieve at least one of the effects of simple structure, small volume, convenient assembly and the like.

In order to achieve the purpose, the utility model adopts the following technical scheme: a bracket for a PTC heater, the bracket comprising:

a frame having a first receiving portion and a second receiving portion in a height direction, the first receiving portion and the second receiving portion communicating in the height direction, the first receiving portion having a first receiving ring in which a thickness direction positioning structure and a width direction positioning structure are formed, the second receiving portion having a second receiving ring and a rear sealing plate;

the cover plate is arranged on the second accommodating part of the frame, the front end of the second accommodating part is covered by the cover plate, a lead-out hole for a lead to penetrate out is formed in the cover plate, and the cover plate is provided with a height positioning block which is abutted to a pressing plate of the PTC heater along the height direction.

The bracket of the PTC heater of the utility model limits the main body of the PTC heater in three dimensions of thickness, width and height through the two components of the frame and the cover plate, thereby fixing the main body of the PTC heater and the bracket. The thickness direction positioning structure and the width direction positioning structure restrict the main body of the PTC heater.

As a refinement, the first receiving ring and the second receiving ring have an overlap. The lower end of the first containing ring is partially overlapped with the upper end of the second containing ring, so that the structure is compact.

As an improvement, the overlapping part extends upwards to form an isolation block, the isolation block is provided with a notch for a lead to pass through, and the notch supports the lead. The spacer blocks insulate the electrodes from the connectors on the electrodes.

In an improvement, the overlapping portion is provided with a first communicating groove for the connector of the PTC heater to enter and a second communicating groove for the thermal breaker of the PTC heater to enter. The first connecting groove is usually provided with a plurality of grooves, and the second connecting groove is usually provided with one groove.

As a modification, the second communication groove is extended to form a support portion of the thermal cut-out supporting the PTC heater.

As the improvement, the second intercommunication groove department of back shrouding forms the back constant head tank with the thermal circuit breaker adaptation of PTC heater, form preceding constant head tank on the apron, preceding constant head tank with the thermal circuit breaker of butt PTC heater around the back constant head tank.

As an improvement, the lower end of the cover plate extends to form the height positioning block, the height positioning block is inserted between the overlapping part and the pressing plate of the PTC heater, or the upper end of the height positioning block is abutted against the second accommodating ring.

As an improvement, the lower end of the cover plate extends downwards to abut against a thickness positioning block of a pressing plate of the PTC heater along the thickness direction.

As an improvement, the rear ends of the two side parts of the first accommodating ring extend to form a rear positioning part, the front end of the bottom part of the first accommodating ring extends to form a front positioning part, and the rear positioning part and the front positioning part form the thickness direction positioning structure.

As an improvement, two side parts of the first containing ring extend inwards to form a left convex rib and a right convex rib, and the left convex rib and the right convex rib form the width direction positioning structure. The left convex rib and the right convex rib enable a gap to be formed between the main body and the support in the left-right direction, and heat dissipation is facilitated.

As an improvement, the bottom of the first accommodating ring extends upwards to form a rear positioning part, and the rear positioning part also extends forwards to form a buckle.

As an improvement, the frame and the cover plate are clamped, the outer side of the second accommodating part extends to form a clamping block, the cover plate extends to form a clamping groove, and the clamping block is matched with the clamping groove.

As an improvement, the upper part of the first accommodating part extends forwards to form a guide block, and the guide block is matched with the leading-out hole of the cover plate so as to guide the cover plate when the cover plate is assembled to the frame, so that the assembly is convenient. At the same time, the guide block reduces the inflow of dust into the frame.

The bracket of the PTC heater has the advantages that: the main body of the PTC heater is restricted in three dimensions of thickness, width and height by two components of a frame and a cover plate, thereby fixing the main body of the PTC heater with the bracket.

Drawings

Fig. 1 is a schematic view of a conventional PTC heater.

Fig. 2 is a simplified wiring structure of a conventional PTC heater.

Fig. 3 is a schematic structural view of a PTC heater according to a first embodiment of the present invention.

Fig. 4 and 5 are exploded views of the PTC heater according to the first embodiment of the present invention.

Fig. 6 is a schematic structural view of the PTC heater according to the first embodiment of the present invention after the cover plate is hidden.

Fig. 7 is a schematic structural view of a main body of a PTC heater according to a first embodiment of the present invention.

Fig. 8 is an exploded view of the main body of the PTC heater according to the first embodiment of the present invention.

Fig. 9 is a schematic structural view of an inner pressing plate of a main body of a PTC heater according to a first embodiment of the present invention.

Fig. 10 is a schematic structural view of a frame of a bracket of a PTC heater according to a first embodiment of the present invention.

Fig. 11 is a schematic structural view of a cover plate of a bracket of a PTC heater according to a first embodiment of the present invention.

Fig. 12 is a schematic structural view of a PTC heater according to a second embodiment of the present invention.

Fig. 13 and 14 are exploded views of PTC heaters according to a second embodiment of the present invention.

In the figure, 01, main body; 02. a support;

1. an outer pressing plate;

2. a corrugated fin;

3. an inner pressure plate; 31. a parallel portion; 32. a vertical portion;

4. a PTC heating sheet group;

5. riveting the connecting sheet;

6. a thermal circuit breaker; 61. a circuit breaker main body; 62. a second connector; 63. a third connector;

7. a first connector;

8. a wire;

9. a frame; 91. a first accommodating portion; 911. a first containment ring; 912. a rear positioning part; 913. a front positioning part; 914. left and right ribs; 915. buckling; 92. a second accommodating portion; 921. a second containment ring; 922. a rear closing plate; 923. a superposition section; 924. an isolation block; 925. a notch; 926. a first connecting groove; 927. a second communicating groove; 928. a support portion; 929. a rear positioning groove; 930. a clamping block; 931. a guide block;

10. a cover plate; 101. an exit aperture; 102. a height positioning block; 103. a thickness positioning block; 104. a card slot; 105. a front positioning groove; 106. and (7) a supporting block.

Detailed Description

The technical solutions of the embodiments of the present invention will be explained and explained below with reference to the drawings of the embodiments of the present invention, but the embodiments described below are only preferred embodiments of the present invention, and are not all embodiments. Other embodiments obtained by persons skilled in the art without any inventive work based on the embodiments in the embodiment belong to the protection scope of the utility model.

Referring to fig. 3 to 14, a PTC heater of the present invention includes a main body and a bracket, the bracket including:

The bracket of the PTC heater of the utility model limits the main body of the PTC heater in three dimensions of thickness, width and height through the two components of the frame and the cover plate, thereby fixing the main body of the PTC heater and the bracket.

Example one

Referring to fig. 3 to 11, a PTC heater according to a first embodiment of the present invention includes a main body and a bracket, the bracket including:

a frame 9, the frame 9 having a first housing portion 91 and a second housing portion 92 in a height direction, the first housing portion 91 and the second housing portion 92 communicating in the height direction, the first housing portion 91 having a first housing ring 911, the first housing ring 911 having a thickness direction positioning structure and a width direction positioning structure formed therein, the second housing portion 92 having a second housing ring 921 and a rear sealing plate 922;

the cover plate 10 is arranged on the second accommodating part 92 of the frame 9, the cover plate 10 covers the front end of the second accommodating part 92, a lead-out hole 101 for a lead to pass through is formed in the cover plate 10, and the cover plate 10 is provided with a height positioning block 102 which is abutted against a pressing plate of the PTC heater along the height direction.

Referring to fig. 7 to 9, the main body of the PTC heater of the present embodiment includes:

the heat radiator comprises a plurality of metal heat radiators, wherein each metal heat radiator comprises an outer pressing plate 1, an inner pressing plate 3 and corrugated heat radiating fins 2 positioned between the outer pressing plate 1 and the inner pressing plate 3;

at least two groups of PTC heating piece groups 4PTC, PTC heating piece group 4PTC includes the PTC heating piece that the multi-disc is parallelly connected, PTC heating piece glues between adjacent metal radiator:

at least two riveting sheets 5, wherein the riveting sheets 5 are arranged on the metal radiator;

a thermal cut-off 6, the thermal cut-off 6 being connected to the rivet 5;

the PTC heating elements are connected in parallel between adjacent metal radiators to form three heating units;

two inner pressing plates 3 on the outer sides of the PTC of the adjacent two PTC heating plate groups 4 are connected into a whole. The number of the integrated inner pressing plates 3 is one.

In other embodiments, the inner pressing plate 3 and the outer pressing plate 1 or the outer pressing plate 1 and the outer pressing plate 1 may be integrally connected.

In this embodiment, two inner press plates 3 located outside the PTCs of two adjacent PTC heating plate groups 4 are integrally formed.

In this embodiment, the two inner press plates 3 located outside the PTCs of the two adjacent PTC heating plate groups 4 are integrally formed by bending, that is, the two heating units share the same plate. In other embodiments, the two inner press plates 3 can also be connected into a whole by welding or the like.

In this embodiment, all the rivet pieces 5 are located at the same end of the PTC heater in the length direction, and the thermal cut-off 6 is disposed between two adjacent rivet pieces 5.

In this embodiment, two riveting pieces 5 adjacent to the thermal circuit breaker 6 are both arranged on the corresponding metal radiator and are far away from one end of the thermal circuit breaker 6 along the thickness direction of the PTC heating piece.

In this embodiment, the rivet 5 is connected to the wire 8 through a first connector 7, and the first connector 7 has a rivet portion connected to the rivet 5 and a crimping portion crimped to the wire 8.

In this embodiment, the first connector 7 is a single piece, thereby reducing the number of electrical connections.

In this embodiment, the rivet piece 5 is connected with a lead 8, and all the leads 8 are led out in the same direction.

In this embodiment, the thermal circuit breaker 6 includes a breaker main body 61, a second connector 62 and a third connector 63, the breaker main body 61 has a first electrical connection post and a second electrical connection post, the second connector 62 one end with the riveting piece 5 is riveted, the other end with the first electrical connection post is riveted, the third connector 63 one end with the second electrical connection post is riveted, the other end compresses tightly with the wire 8.

In the present embodiment, the second connector 62 and the third connector 63 are a single piece, thereby reducing the number of electrical connections.

In this embodiment, the number of the PTC heating sheet groups 4 is three, and the number of the conducting wires 8 is three.

In this embodiment, the first housing ring 911 and the second housing ring 921 have an overlapping portion 923. The lower end of the first containing ring 911 is partially overlapped with the upper end of the second containing ring 921, so the structure is compact.

In this embodiment, the superposition portion 923 extends upward to form an isolation block 924, the isolation block 924 is provided with a notch 925 for a wire to pass through, and the notch 925 supports the wire. The insulating blocks 924 insulate the electrodes and the connectors on the electrodes.

In this embodiment, the overlapping portion 923 is provided with a first communicating groove 926 through which the first connector and the second connector enter and a second communicating groove 927 through which the heat supply breaker 6 enters. Three first communicating grooves 926 and one second communicating groove 927 are provided.

In this embodiment, the second communicating groove 927 extends to form a support portion 928 for supporting the thermal breaker 6.

In this embodiment, the second intercommunication groove 927 department of back shrouding 922 forms the back constant head tank 929 with the adaptation of thermal circuit breaker 6, constant head tank 105 before forming on the apron 10, preceding constant head tank 105 with butt thermal circuit breaker 6 around the back constant head tank 929 is fixed with thermal circuit breaker 6.

In this embodiment, the height positioning block 102 is formed by extending the lower end of the cover plate 10, and the height positioning block 102 is inserted between the overlapping portion 923 and the pressing plate of the PTC heater. There are a plurality of height positioning blocks 102.

In other embodiments, the upper end of the height positioning block 102 may abut against the second receiving ring 921.

In this embodiment, the lower end of the cover plate 10 extends downward and abuts against a thickness positioning block 103 of a pressing plate of the PTC heater in the thickness direction. There are a plurality of thickness positioning blocks 103.

In this embodiment, the rear ends of the two side portions of the first accommodating ring 911 extend to form rear positioning portions 912, the front end of the bottom portion of the first accommodating ring 911 extends to form front positioning portions 913, and the rear positioning portions 912 and the front positioning portions 913 form the thickness direction positioning structure. There are a plurality of post-positioning portions 912.

In this embodiment, the two side portions of the first receiving ring 911 extend inward to form left and right ribs 914, and the left and right ribs 914 form the width direction positioning structure. There are multiple left and right ribs 914. The left and right ribs 914 also allow the main body to be easily set in the frame 9.

In this embodiment, the bottom of the first receiving ring 911 extends upward to form a rear positioning portion 912, the rear positioning portion 912 further extends forward to form a buckle 915, and the buckle 915 is clamped between the vertical portion of the inner pressing plate 3 and the outer pressing plate 5 above the vertical portion. The upper portion of the catch 915 forms a guide surface.

In this embodiment, the frame 9 is clamped with the cover plate 10, a latch 930 is formed by extending the outer side of the second accommodating portion 92, the cover plate 10 is extended to form a latch slot 104, and the latch 930 is matched with the latch slot 104. There are two latching pieces 930, one of which is located at the right side of the second receiving portion 92 and the other of which is located at the upper side of the second receiving portion 92.

In this embodiment, the upper portion of the first receiving portion 91 extends forward to form a guide block 931, and the guide block 931 is matched with the lead-out hole 101 of the cover 10 to guide the cover 10 when the cover 10 is assembled to the frame 9, so as to facilitate the assembly. At the same time, the guide blocks 931 reduce the inflow of dust into the frame 9.

In this embodiment, the frame 9 is integrally formed of an insulating material. The cap plate 10 is integrally formed of an insulating material.

The main body of the PTC heater of the first embodiment of the utility model has the advantages that: the connection between the riveting sheet 5 and the wiring terminal is replaced by the connection between the outer pressing plate 1 or the inner pressing plate 3, so that the number of electric connection positions is reduced; the thermal circuit breaker 6 and all the riveting sheets 5 are arranged at the same end of the PTC heater, so that the size of the PTC heater is reduced, a cross-connection line and a terminal are eliminated, and a live wire is shortened; the thermal breaker 6 is arranged between the riveting sheets, so that the influence of the thermal breaker on air inlet and outlet is eliminated; all the lead wires are led out in the same direction, so that the assembly is convenient; the riveting part and the crimping part of the connector are vertical, and the size is small.

The PTC heater of the first embodiment of the utility model has the beneficial effects that: the main body of the PTC heater is restricted in three dimensions of thickness, width and height by two components, a frame 9 and a cover plate 10, thereby fixing the main body of the PTC heater with the bracket; an isolation block 924 is provided to insulate the electrodes (rivet tab and connector); the thermal circuit breaker is supported and fixed, and a gap between the thermal circuit breaker 6 and the pressing plate is ensured; the wire routing is easy; the assembly between the frame 9 and the cover plate 10 is easy; the whole structure is compact and the volume is small.

Example two

The second embodiment is different from the first embodiment in the number of heat generating units.

Referring to fig. 12 to 14, in the present embodiment, four heating units are connected in parallel, and four groups of PTC heating element groups 4 are provided. The number of the integrated inner pressing plates 3 is two.

In this embodiment, two latching pieces 930 on the second receiving ring 921 of the second receiving portion 92 are formed at both sides.

In this embodiment, the structures of the frame 9 and the cover plate 10 are adaptively adjusted according to the number of the heat generating units.

Other structures and effects of this embodiment are the same as those of the first embodiment, and are not described herein.

While the utility model has been described with reference to specific embodiments thereof, it will be understood by those skilled in the art that the utility model is not limited thereto but is intended to cover various modifications and changes, including but not limited to the details shown in the drawings and described in the foregoing detailed description. Any modification which does not depart from the functional and structural principles of the utility model is intended to be included within the scope of the following claims.

Claims

1. A bracket of a PTC heater is characterized in that: the bracket includes:

a frame (9), the frame (9) having a first housing portion (91) and a second housing portion (92) in a height direction, the first housing portion (91) and the second housing portion (92) communicating in the height direction, the first housing portion (91) having a first housing ring (911), a thickness direction positioning structure and a width direction positioning structure being formed in the first housing ring (911), the second housing portion (92) having a second housing ring (921) and a rear sealing plate (922);

the cover plate (10) is arranged on the second accommodating part (92) of the frame (9), the front end of the second accommodating part (92) is covered by the cover plate (10), a lead-out hole (101) for a lead to penetrate out is formed in the cover plate (10), and the cover plate (10) is provided with a height positioning block (102) which is abutted to a pressing plate of the PTC heater along the height direction.

2. A bracket for a PTC heater according to claim 1, wherein: the first housing ring (911) and the second housing ring (921) have an overlapping portion (923).

3. A bracket for a PTC heater according to claim 2, wherein: coincidence portion (923) upwards extend and form isolation piece (924), isolation piece (924) set up breach (925) that supply the wire to pass through, breach (925) support wire.

4. A bracket for a PTC heater according to claim 2, wherein: the overlapping portion (923) is provided with a first communicating groove (926) for the connector of the PTC heater to enter and a second communicating groove (927) for the thermal breaker of the PTC heater to enter.

5. A bracket of a PTC heater according to claim 4, wherein: a supporting part (928) of a thermal breaker for supporting the PTC heater is formed at the second communication groove (927) in an extending way; the second intercommunication groove (927) department of back shrouding (922) forms back constant head tank (929) with the thermal circuit breaker adaptation of PTC heater, constant head tank (105) before forming on apron (10), preceding constant head tank (105) with the thermal circuit breaker of butt PTC heater around back constant head tank (929).

6. A bracket for a PTC heater according to claim 2, wherein: the lower end of the cover plate (10) extends to form the height positioning block (102), the height positioning block (102) is inserted between the superposition part (923) and a pressure plate of the PTC heater, or the upper end of the height positioning block (102) is abutted against the second accommodating ring (921); the lower end of the cover plate (10) extends downwards to abut against a thickness positioning block (103) of a pressing plate of the PTC heater along the thickness direction.

7. A bracket for a PTC heater according to claim 1, wherein: rear positioning parts (912) are formed by extending the rear ends of two side parts of the first accommodating ring (911), a front positioning part (913) is formed by extending the front end of the bottom part of the first accommodating ring (911), and the rear positioning part (912) and the front positioning part (913) form the thickness direction positioning structure; two side parts of the first containing ring (911) extend inwards to form a left convex rib (914) and a right convex rib (914), and the left convex rib and the right convex rib (914) form the width direction positioning structure.

8. A bracket for a PTC heater according to claim 1, wherein: the bottom of the first containing ring (911) extends upwards to form a rear positioning part (912), and the rear positioning part (912) also extends forwards to form a buckle (915).

9. A bracket for a PTC heater according to claim 1, wherein: the frame (9) is clamped with the cover plate (10), a clamping block (930) is formed by extending the outer side of the second accommodating part (92), a clamping groove (104) is formed by extending the cover plate (10), and the clamping block (930) is matched with the clamping groove (104).

10. A bracket for a PTC heater according to claim 1, wherein: the upper part of the first accommodating part (91) extends forwards to form a guide block (931), and the guide block (931) is matched with the leading-out hole (101) of the cover plate (10).