CN210267475U

CN210267475U - PTC liquid heater

Info

Publication number: CN210267475U
Application number: CN201920655769.5U
Authority: CN
Inventors: 李庆院
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-05-08
Filing date: 2019-05-08
Publication date: 2020-04-07
Anticipated expiration: 2029-05-08

Abstract

The utility model discloses a PTC liquid heater, including PTC heating element, still include a body, the body forms the water cavity for the cavity, distributes a week installation cavity in the pipe wall of body, and the axis of installation cavity is parallel with the axis of body and runs through the pipe wall both ends of body, and the installation cavity includes first heat conduction surface, second heat conduction surface, first heat conduction surface is relative with the water cavity, and the second heat conduction surface is relative with first heat conduction surface, PTC heating element includes two heating surfaces, and PTC heating element locates in the installation cavity, and two heating surfaces are respectively relative with first heat conduction surface, second heat conduction surface, and a side cavity that keeps away from the water cavity in the installation cavity forms the pressfitting deformation face; the water passing cavity is internally provided with a reinforcing rib which divides the water passing cavity into a plurality of sub-cavities, and the axes of the sub-cavities are parallel to the axis of the water passing cavity. Compared with the prior art, the heating power of the PTC is improved, and the heat loss can be reduced by the way of dividing the sub-cavities, so that the heating effect is improved.

Description

PTC liquid heater

Technical Field

The utility model relates to a PTC liquid heater, in particular to a PTC liquid heater for a semiconductor electric boiler.

Background

With the promotion of coal-to-electricity projects of a northern heating system, a semiconductor electric boiler gradually becomes a mainstream of coal-to-electricity, but as the semiconductor electric boiler is still in the early development stage, no clear national standard exists, the market demand is huge, so that the fish and the dragon in the industry are mixed, and the performance difference of PTC heater products is great. The common PTC liquid heaters on the market have the following disadvantages: the single PTC has low power, only about 80W; the PTC liquid heater has high surface temperature, large heat loss and easy frying.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a PTC liquid heater, the technical problem that solve is to improve PTC's heating power, reduces the heat loss.

In order to solve the above problem, the utility model discloses a following technical scheme realizes: a PTC liquid heater comprises a PTC heating assembly and a pipe body, wherein the pipe body is hollow to form a water passing cavity, a circle of installation cavity is distributed in the pipe wall of the pipe body, the axis of the installation cavity is parallel to the axis of the pipe body and penetrates through the two ends of the pipe wall of the pipe body, the installation cavity comprises a first heat conduction surface and a second heat conduction surface, the first heat conduction surface is opposite to the water passing cavity, the second heat conduction surface is opposite to the first heat conduction surface, the PTC heating assembly comprises two heating surfaces, the PTC heating assembly is arranged in the installation cavity, the two heating surfaces are respectively opposite to the first heat conduction surface and the second heat conduction surface, a pressing deformation surface is formed on the cavity wall at one side of the installation cavity far away from the water passing cavity, after the PTC heating assembly is assembled in the installation cavity, the pressing deformation surface is pressed by a press and deforms with the PTC heating assembly so as to realize that the PTC heating assembly is tightly attached to the installation cavity, meanwhile, the first heat-conducting surface is tightly attached to one heating surface, and the second heat-conducting surface is tightly attached to the other heating surface; the water passing cavity is internally provided with a reinforcing rib which divides the water passing cavity into a plurality of sub-cavities, and the axes of the sub-cavities are parallel to the axis of the water passing cavity.

Furthermore, the cavity wall of each sub-cavity is provided with a heat dissipation bulge.

Furthermore, the two side faces adjacent to the first heat conduction face in the installation cavity and the position close to the first heat conduction face are respectively provided with a limiting bulge so as to limit the PTC heating assembly.

Furthermore, the two side faces adjacent to the first heat-conducting face and close to the second heat-conducting face in the mounting cavity are respectively provided with a groove arranged along the axis direction of the mounting cavity.

Further, the reinforcing ribs divide the water passing cavity into a plurality of fan-shaped sub-cavities.

Further, the sub-cavity is equipped with more than four, and the quantity that sets up of installation cavity equals with the quantity that sets up of sub-cavity, and the one-to-one setting.

Further, the PTC heating assembly comprises a sheet-shaped PTC heating sheet, an electrode plate disposed on two heating surfaces of the PTC heating sheet, and an insulating film, wherein the electrode plate 22 and the PTC heating sheet are integrally covered by the insulating film.

Further, the both ends of body are equipped with erection joint respectively, erection joint and body integrated into one piece, erection joint includes the external screw thread and locates the cross-section between external screw thread and the body and be regular hexagon portion.

Further, the pipe body is made of an aluminum alloy material.

Further, the outer surface of the pipe wall of the pipe body is coated with a corrosion-resistant layer.

Compared with the prior art, the utility model, through setting up the installation cavity in the pipe wall of body, set up PTC heating element in the installation cavity to make two heating surfaces of PTC heating element laminate with two heat conduction surfaces of installation cavity, cut apart into a plurality of sub-cavities with the official chamber of body simultaneously, can improve PTC's heating power like this, through the mode of cutting apart the sub-cavity, can reduce the heat loss moreover, thereby improve the heating effect.

Drawings

Fig. 1 is a schematic view of the internal structure of embodiment 1 of the present invention.

Fig. 2 is an external structural schematic diagram of embodiment 1 of the present invention.

Fig. 3 is a schematic structural view of the PTC heating element of the present invention.

Fig. 4 is a schematic structural view of the utility model before the pressing deformation surface is not pressed.

Fig. 5 is a schematic view of the internal structure of embodiment 2 of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

As shown in fig. 1, 2 and 4, the present invention discloses a PTC liquid heater, which comprises a PTC heating assembly 2 and a tube body 1, wherein the PTC heating assembly 2 can adopt the prior art, and is not limited herein; the pipe body 1 is hollow to form a water passing cavity 12, a circle of installation cavities 11 are distributed in the pipe wall of the pipe body 1, the axis of each installation cavity 11 is parallel to the axis of the pipe body 1 and penetrates through two ends of the pipe wall of the pipe body 1, each installation cavity 11 comprises a first heat conduction surface 114 and a second heat conduction surface 115, each first heat conduction surface 114 is a plane, and each second heat conduction surface 115 forms a plane which is attached to the surface of the PTC heating assembly 2 after being subjected to pressurization deformation through a press; the first heat-conducting surface 114 is opposite to the water passing cavity 12, the second heat-conducting surface 115 is opposite to the first heat-conducting surface 114, the PTC heating assembly 2 comprises two heating surfaces 24, after the PTC heating assembly 2 is arranged in the installation cavity 11, the two heating surfaces 24 are respectively opposite to the first heat-conducting surface 114 and the second heat-conducting surface 115, and a cavity wall on one side of the installation cavity 11, which is far away from the water passing cavity 12, forms a press-fit deformation surface 13; the water passing cavity 12 is internally provided with a reinforcing rib 14 which divides the water passing cavity 12 into a plurality of sub-cavities 121, the axes of the sub-cavities 121 are parallel to the axis of the water passing cavity 12, and two adjacent sub-cavities 121 are not communicated with each other.

As shown in fig. 2, the two ends of the pipe body 1 are respectively provided with the installation joints 3, the installation joints 3 are integrally formed with the pipe body 1, the outer diameter of the installation joints 3 is smaller than the outer diameter of the pipe body 1 so as to expose the two end openings 116 of the installation cavity 11, the installation joints 3 comprise external threads 16 and a cross section between the external threads 16 and the pipe body 1 is a regular hexagon part 17, the regular hexagon part 17 is flush with the first heat conduction surface 114, and the regular hexagon part 17 is used for a wrench to install the pipe body 1.

As shown in fig. 1 and fig. 2, the cavity wall of the sub-cavity 121 is provided with a heat dissipating protrusion 15, which is used to increase the heat conducting area of the first heat conducting surface 114, so as to further improve the heating effect.

As shown in fig. 1, the two side surfaces of the mounting cavity 11 adjacent to the first heat conduction surface 114 and near the first heat conduction surface 114 are respectively provided with a limiting protrusion 112 to limit the PTC heating assembly 2, so as to ensure that the PTC heating assembly 2 can be accurately placed at the center of the mounting cavity 11 during assembly.

As shown in fig. 1 and 4, grooves 113 arranged along the axis direction of the installation cavity 11 are respectively arranged on two side surfaces adjacent to the first heat-conducting surface 114 in the installation cavity 11 and close to the second heat-conducting surface 115, so that the press-fit deformation surface 13 can be ensured to be locally deformed in the middle all the time when being pressed and deformed, the width of the second heat-conducting surface 115 after being deformed and the width of the second heat-conducting surface 115 of the PTC heating assembly 2 are larger than the surface width of the PTC heating assembly 2, the unit area power of the PTC liquid heater can be effectively improved by the arrangement, and the experimental data show that the unit area power is improved by 10-15%.

As shown in fig. 3, as an embodiment of the present invention, the PTC heating assembly 2 includes a sheet-shaped PTC heating sheet 21, electrode plates 22 disposed on both side surfaces of the PTC heating sheet 21, and an insulating film 23, the insulating film 23 integrally covers the electrode plates 22 and the PTC heating sheet 21 together, and two lead wires 221 electrically connected to the two electrode plates 22 are respectively disposed on the two electrode plates 22, two side surfaces (located on both side surfaces of the electrode plates 22) of the PTC heating assembly 2 form two heating surfaces 24, including the lead wires 221 are led out from one of the openings 116 of the mounting cavity 11, both side surfaces of the PTC heating sheet 21 are coated with electrode layers (not shown in the figure), and the electrode plates 22 are in contact with the electrode layers, so that the PTC heating sheet 21 is turned on to generate heat.

As shown in fig. 1, in the present invention, the distribution of the reinforcing ribs 14 is that the reinforcing ribs 14 extend along the length direction of the water passing chamber 12, and the reinforcing ribs 14 divide the water passing chamber 12 into a plurality of fan-shaped sub-chambers 121 with equal size.

In the utility model, the pipe body 1 is made of aluminum alloy material; the outer surface of the pipe wall of the pipe body 1 is coated with a corrosion-resistant layer, and the corrosion-resistant layer can be formed by performing surface oxidation treatment or Teflon spraying treatment on the outer surface of the pipe wall of the pipe body 1 so as to enhance the corrosion resistance of the pipe body 1.

The utility model discloses in, the sub-cavity 121 is equipped with more than four, and the quantity that sets up of installation cavity 11 equals with the quantity that sets up of sub-cavity 121, and the one-to-one setting.

During assembly, the plurality of PTC heating components 2 are sequentially placed in the installation cavity 11, and then the press is used for pressing the pressing deformation surfaces 13 to form a final finished product.

Example 1

As shown in fig. 1, in embodiment 1, six sub-cavities 121 are provided, and six installation cavities 11 are also provided, so as to ensure that each sub-cavity 121 corresponds to one PTC heating assembly 2; the heat dissipating protrusion 15 is disposed on a wall of the cavity at a side of the sub-cavity 121 opposite to the first heat conducting surface 114.

Example 2

As shown in fig. 5, in embodiment 2, there are four sub-cavities 121, and there are also four installation cavities 11, so as to ensure that each sub-cavity 121 corresponds to one PTC heating assembly 2; the heat dissipating protrusion 15 is disposed on a wall of the cavity at a side of the sub-cavity 121 opposite to the first heat conducting surface 114.

The utility model discloses a set up the installation cavity in the pipe wall of body, set up PTC heating element in the installation cavity to make two heating surfaces of PTC heating element and the laminating of two heat conduction surfaces of installation cavity, cut apart into a plurality of sub-cavities with the official cavity of body simultaneously, can improve PTC's heating power like this, through the mode of cutting apart the sub-cavity, can reduce the heat loss moreover, thereby improve the heating effect.

Claims

1. A PTC liquid heater comprising a PTC heating assembly (2), characterized in that: the pipe body (1) is hollow to form a water passing cavity (12), a circle of installation cavity (11) is distributed in the pipe wall of the pipe body (1), the axis of the installation cavity (11) is parallel to the axis of the pipe body (1) and penetrates through two ends of the pipe wall of the pipe body (1), the installation cavity (11) comprises a first heat conduction surface (114) and a second heat conduction surface (115), the first heat conduction surface (114) is opposite to the water passing cavity (12), the second heat conduction surface (115) is opposite to the first heat conduction surface (114), the PTC heating assembly (2) comprises two heating surfaces (24), the PTC heating assembly (2) is arranged in the installation cavity (11), the two heating surfaces (24) are respectively opposite to the first heat conduction surface (114) and the second heat conduction surface (115), and a pressing surface (13) is formed on the cavity wall of one side, far away from the water passing cavity (12), of the installation cavity (11), after the PTC heating assembly (2) is assembled in the installation cavity (11), the press deforming surface (13) is pressed through a press, the press deforming surface (13) is pressed to deform and is tightly attached to the PTC heating assembly (2) so as to fix the PTC heating assembly (2) in the installation cavity (11), meanwhile, the first heat conducting surface (114) is tightly attached to one heating surface (24), and the second heat conducting surface (115) is tightly attached to the other heating surface (24); the water passing cavity (12) is internally provided with a reinforcing rib (14) which divides the water passing cavity (12) into a plurality of sub-cavities (121), and the axes of the sub-cavities (121) are parallel to the axis of the water passing cavity (12).

2. A PTC liquid heater according to claim 1, wherein: the cavity wall of each sub-cavity (121) is provided with a heat dissipation bulge (15).

3. A PTC liquid heater according to claim 1, wherein: two side faces adjacent to the first heat-conducting face (114) in the mounting cavity (11) and positions close to the first heat-conducting face (114) are respectively provided with a limiting protrusion (112) so as to limit the PTC heating assembly (2).

4. A PTC liquid heater according to claim 3, wherein: and grooves (113) arranged along the axial direction of the mounting cavity (11) are respectively arranged on two side faces, adjacent to the first heat-conducting surface (114), of the mounting cavity (11) and close to the second heat-conducting surface (115).

5. A PTC liquid heater according to any of claims 1-4, wherein: the reinforcing ribs (14) divide the water passing cavity (12) into a plurality of fan-shaped sub cavities (121).

6. The PTC liquid heater according to claim 5, wherein: the sub-cavities (121) are more than four, the number of the installation cavities (11) is equal to that of the sub-cavities (121), and the sub-cavities are arranged in a one-to-one correspondence manner.

7. A PTC liquid heater according to claim 1, wherein: the PTC heating assembly (2) comprises a sheet-shaped PTC heating sheet (21), an electrode plate (22) arranged on two heating surfaces of the PTC heating sheet (21), and an insulating film (23), wherein the electrode plate (22) and the PTC heating sheet (21) are integrally coated by the insulating film (23).

8. A PTC liquid heater according to claim 1, wherein: the two ends of the pipe body (1) are respectively provided with an installing joint (3), the installing joints (3) and the pipe body (1) are integrally formed, and the installing joints (3) comprise external threads (16) and are arranged on the cross section between the external threads (16) and the pipe body (1) and are regular hexagon parts (17).

9. A PTC liquid heater according to claim 1, wherein: the pipe body (1) is made of an aluminum alloy material.

10. A PTC liquid heater according to claim 1, wherein: the outer surface of the pipe wall of the pipe body (1) is coated with a corrosion-resistant layer.