CN213661983U

CN213661983U - PTC water heater

Info

Publication number: CN213661983U
Application number: CN202022274006.1U
Authority: CN
Inventors: 孔君义
Original assignee: Suzhou Famili Electronic Technology Co ltd
Current assignee: Suzhou Famili Electronic Technology Co ltd
Priority date: 2020-10-13
Filing date: 2020-10-13
Publication date: 2021-07-09
Anticipated expiration: 2030-10-13

Abstract

The utility model provides a PTC water heater, it includes: die-casting aluminum water channel and heating pipe; the die-casting aluminum water channel is provided with a plurality of grooves which are arranged in parallel, the heating pipes are respectively accommodated in the grooves, each heating pipe comprises a heating core body and a U-shaped aluminum pipe matched with the grooves of the die-casting aluminum water channel, and the heating core body is placed into the U-shaped aluminum pipe from the side face of the U-shaped aluminum pipe and is insulated from the inner wall of the U-shaped aluminum pipe through an insulating layer. The utility model discloses a PTC water heater has advantages such as with low costs, simple process, heating efficiency height, power are big, the security is high.

Description

PTC water heater

Technical Field

The utility model relates to a PTC heater field especially relates to a PTC water heater.

Background

New energy automobiles are listed in the national level of industrial development planning, and the replacement of traditional fuel oil automobiles is in the trend. Different from the traditional fuel vehicle, the battery heat management, the air conditioning and heating system and the like of the new energy vehicle all need independent heaters, and PTC is an ideal material of an automobile heating device as a positive temperature coefficient semiconductor material. The traditional PTC heater has the advantages of low heating efficiency, poor heating effect and great potential safety hazard.

One situation of the existing water heater adopts a German Ebeh structure, a plurality of small heating modules are usually plugged into a groove of die-cast aluminum, the heating modules are plugged into the groove of the die-cast aluminum, so that the inner walls of the grooves of the die-cast aluminum of the heating modules are tightly attached, the thermal resistance is reduced, and a water channel is arranged outside the grooves of the die-cast aluminum. The structure needs to plug a plurality of heating modules (usually more than 10 heating modules) into the corresponding die-casting aluminum grooves, and certain spacing distance is needed between the grooves, so that a large space is wasted, the size of the die-casting aluminum is increased, and the weight is also increased.

Another situation of the existing water heater is that a traditional automobile water heating air core body (water tank) structure is adopted, a plurality of heating pipes are usually plugged between parallel water flow channels (micro-channel flat aluminum pipes), but in the structure, silica gel needs to be coated between the heating pipes and the micro-channels, then the silica gel is compressed by a press and finally solidified, so that the heating pipes and the micro-channels are tightly attached to reduce thermal resistance, the process is complex, the efficiency is low, welding between the micro-channels and water chambers at two ends is easy to damage, and potential safety hazards such as water leakage are caused.

SUMMERY OF THE UTILITY MODEL

To the technical problem, the utility model discloses a PTC water heater, it includes: die-casting aluminum water channel and heating pipe; the die-casting aluminum water channel is provided with a plurality of grooves which are arranged in parallel, the heating pipes are respectively accommodated in the grooves, each heating pipe comprises a heating core body and a U-shaped aluminum pipe matched with the grooves of the die-casting aluminum water channel, and the heating core body is placed into the U-shaped aluminum pipe from the side face of the U-shaped aluminum pipe and is insulated from the inner wall of the U-shaped aluminum pipe through an insulating layer.

The utility model discloses an among the above-mentioned PTC water heater, owing to adopted back style of calligraphy aluminium pipe opening mode, U type pipe pattern promptly, can be directly fill in U type aluminium pipe with heating core and insulating layer edgewise, through the recess of die casting aluminium water course and the tapering of U type aluminium pipe, with the aluminium pipe with the compaction of heating core, hug closely, can effectively reduce the thermal resistance, promote heating efficiency. The structure avoids pressing the tube, the process is simple, the heating core body can be made longer, the PTC sheets are continuously arranged, the space is effectively saved, and the power density is higher compared with the Eebehh structure. On the other hand, the structure maintains the advantages of the Ebeh structure, the die-casting aluminum structure is adopted, safety and reliability are realized, and the die-casting aluminum has large power density, relatively speaking, the size of the die-casting aluminum can be smaller, and the cost is lower.

In a further aspect of the present invention, the heating core includes a PTC heating sheet and electrode sheets located on both sides of the PTC heating sheet.

Through the technical scheme, the heating core body is simpler in structure.

In a further aspect of the present invention, the insulating layer is made of an insulating material that is matched with the shape of the inner wall of the U-shaped aluminum pipe.

Through the technical scheme, the heating pipe can be mounted more conveniently.

In a further aspect of the present invention, the insulating layer is made of a high thermal conductivity insulating material.

Through the technical scheme, the heat transfer efficiency between the heating core body and the aluminum pipe is improved, so that the integral heat conductivity of the PTC water heater is improved.

In a further aspect of the present invention, the insulating layer is a U-shaped silica gel pad.

Through the technical scheme, the heat transfer efficiency between the heating core body and the aluminum pipe is improved, so that the integral heat conductivity of the PTC heater is improved.

In a further aspect of the present invention, the insulating layer is an alumina substrate.

In a further aspect of the present invention, the insulating layer is a polyimide film.

In a further aspect of the present invention, the electrode plate is made of stainless steel, aluminum or copper with high thermal conductivity.

Through above-mentioned technical scheme, improve the heat conductivity of heating core.

Drawings

Fig. 1 is a schematic structural view of a PTC water heater according to the present invention;

fig. 2 is a schematic structural view of a heating pipe of the PTC water heater of the present invention;

fig. 3 is an exploded view of the heating tube of the PTC water heater of the present invention.

Detailed Description

The technical solution of the present invention will be further described with reference to the following specific examples, but the present invention is not limited to these examples.

Referring to fig. 1 to 3, the PTC water heater of the present invention comprises: a die-casting aluminum water channel 1 and a heating pipe 2. As shown in fig. 1, a die-cast aluminum waterway 1 has a plurality of grooves arranged in parallel, and heating pipes 2 are respectively accommodated in the plurality of grooves. Referring to fig. 2, the heating pipe comprises a heating core 21 and a U-shaped aluminum pipe 22 matched with the groove of the die-cast aluminum water channel 1, wherein the heating core 21 is placed into the U-shaped aluminum pipe 22 from the side surface of the U-shaped aluminum pipe and is insulated from the inner wall of the U-shaped aluminum pipe 22 by an insulating layer 23.

Regarding the insulating layer 23, it is made of an insulating material matching the shape of the inner wall of the U-shaped aluminum tube, and preferably, as shown in fig. 2, it may be in the form of a U-shaped insulating silica gel pad, thereby facilitating installation. Of course, it will be appreciated that the insulation may take other forms, such as insulation filled between the heating core and the inner wall of the U-shaped aluminum tube 22.

Regarding the heating core 21, it is preferable that, as shown in fig. 3, a PTC heat generating sheet 210 and electrode sheets 211 respectively located at both sides of the PTC heat generating sheet 210 are included. As shown in fig. 2 and 3, the two electrode tabs 211 are respectively provided with lead-out terminals exposed to the outside so as to facilitate the application of voltages of different polarities to the two electrode tabs, respectively, and preferably, the lead-out terminals of the two electrode tabs 211 are spaced apart in a horizontal direction (i.e., a length direction of the U-shaped aluminum pipe) to prevent problems such as a short circuit due to erroneous contact. As shown in fig. 2 and 3, the lead-out end of one electrode sheet 211 may be disposed at the left-side end portion thereof, and the lead-out end of the other electrode sheet 211 may be disposed at a distance therefrom.

In order to improve the heat transfer efficiency between the heating core and the aluminum pipe, thereby improving the overall heat conductivity of the PTC heater, the utility model discloses a further technical scheme in, insulating layer 23 can adopt other high heat conduction insulating materials to make. For example, the insulating layer may be an alumina substrate, a polyimide film, or the like.

In addition, in order to improve the heat conductivity of the heating core, the utility model discloses a further technical scheme in, electrode slice 211 can choose for use the stainless steel, aluminium or the copper of high heat conductivity to make.

Therefore, compare prior art, the utility model discloses a PTC water heater has advantages such as with low costs, simple process, heating efficiency height, power are big, the security is high.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and improvements can be made without departing from the inventive concept, and all of them belong to the protection scope of the present invention.

Claims

1. A PTC water heater, comprising: die-casting aluminum water channel and heating pipe; wherein the content of the first and second substances,

the die-casting aluminum water channel is provided with a plurality of grooves which are arranged in parallel, the heating pipes are respectively accommodated in the grooves, each heating pipe comprises a heating core body and a U-shaped aluminum pipe matched with the grooves of the die-casting aluminum water channel, and the heating core body is placed into the U-shaped aluminum pipe from the side face of the U-shaped aluminum pipe and is insulated from the inner wall of the U-shaped aluminum pipe through an insulating layer.

2. The PTC water heater according to claim 1, wherein the heating core includes a PTC heat generating sheet and electrode sheets located at both sides of the PTC heat generating sheet.

3. A PTC water heater according to claim 2, wherein the insulating layer is an insulating material which matches the shape of the inner wall of the U-shaped aluminium tube.

4. The PTC water heater according to claim 3, wherein the insulating layer is made of a high thermal conductive insulating material.

5. The PTC water heater according to claim 4, wherein the insulating layer is a U-shaped silicone pad.

6. The PTC water heater according to claim 4, wherein the insulating layer is an alumina substrate.

7. The PTC water heater according to claim 4, wherein the insulating layer is a polyimide film.

8. The PTC water heater according to claim 2, wherein the electrode sheet is made of stainless steel, aluminum or copper having high thermal conductivity.