CN209744708U

CN209744708U - Multi-channel runner layer structure of PTC water heater

Info

Publication number: CN209744708U
Application number: CN201920025692.3U
Authority: CN
Inventors: 郑大存; 赵晓峰; 方宏生
Original assignee: Shanghai Fengtian Electronics Co Ltd
Current assignee: Shanghai Fengtian Electronics Co Ltd
Priority date: 2019-01-08
Filing date: 2019-01-08
Publication date: 2019-12-06
Anticipated expiration: 2029-01-08

Abstract

The utility model discloses a PTC water heater multichannel runner layer structure for heating flowing medium, the upper and lower both sides of runner layer structure have at least one side and PTC heating element heat-conduction to support and lean on. The flow passage layer structure comprises an inlet flow dividing piece and an outlet flow converging piece; the structure of the flow passage layer comprises a lower shell, an upper shell and a sealing element, wherein the lower shell is provided with a water inlet and a water outlet; at least one of the lower shell and the upper shell is provided with two parallel runners, and the lengths of the two runners are basically equal; the two flow channels are equal in width; the arrangement mode of the flow channel layers of the electric heating device improves the heat exchange effect of the electric heating device, and meanwhile, the electric heating device is convenient to install, low in flow resistance and high in heat exchange efficiency.

Description

Multi-channel runner layer structure of PTC water heater

Technical Field

The utility model relates to an accessory of electronic equipment for a motor vehicle; in particular to a PTC water heater multi-channel flow passage layer structure of an electric heating device for a motor vehicle.

Background

The restriction that present PTC water heater's thermal power received the runner is very big, because the runner structure has influenced the flow resistance of coolant liquid, and then influence heat transfer capacity, when heat transfer capacity is low, the heat that the PTC resistance card gived off can not in time be taken away by the coolant liquid, the resistance of PTC resistance card can increase, PTC's heating power can greatly reduced under the condition of constant voltage, product property ability and PTC's thermal efficiency receive the influence, when the PTC thermal efficiency is low, can consume a large amount of electric quantity of hybrid car and electric motor car, and then reduced the continuation of the journey mileage of hybrid car type and pure electric vehicle type battery, it is very crucial to PTC water heater's wholeness can promote from this to see an efficient runner scheme.

In the prior art, the PTC heating element is abutted against one side of the heat dissipation part in the heat conduction process to generate a large amount of heat, the generated heat needs to be taken away through the heat exchange element arranged on the other side surface, the currently known mode is a fin type heat exchange flow channel, the heat exchange efficiency of the fin type heat exchange flow channel is relatively low, and the installation is inconvenient, so that the heat generated by the PTC heating element cannot be taken away, and the heating power of the PTC heating element is reduced.

In conclusion, the PTC water heater in the prior art has the disadvantages of insufficient heat exchange, inconvenient installation, high flow resistance and low heat exchange efficiency.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a completion heat transfer that can be more abundant, simple to operate simultaneously, the flow resistance is low, PTC water heater multichannel runner layer structure that heat exchange efficiency is high.

In order to solve the technical problem, the utility model provides a technical scheme does: a multi-channel flow channel layer structure of a PTC water heater comprises a lower shell, an upper shell and a sealing element, wherein at least one of the lower shell and the upper shell is attached to the PTC heating element, a groove for installing the sealing element is formed in the lower shell or the upper shell, the lower shell and the upper shell are pressed into a sealed cavity through the sealing element, an inlet, an outlet and two branch flow channels with equal length are arranged in the sealed cavity, the two branch flow channels guide flowing media in the inlet to the outlet in a side-by-side mode, and after the lower shell and the upper shell are pressed, the flowing media in the flow channel layer can only flow to the outlet through the inlet along the two branch flow channels.

Preferably, the two branch channels have the same cross-sectional width, and the cross-sectional area of each branch channel does not exceed 40 square millimeters.

Preferably, both said sub-runners are comprised of at least two full length paths and each sub-runner is no more than 1.2 metres in length.

After the structure is adopted, the utility model discloses following beneficial effect has: the layout structure of the flow channel layer is optimized, the main flow channel and the branch flow channels are added, the branch flow channels are arranged in a parallel mode, the flow velocity of medium fluid is balanced, the heat dissipation of the whole heat dissipation plane is balanced to be even, the overhigh local temperature is avoided, the heat exchange can be completed more fully by a new flow channel arrangement mode, the heat exchange effect is improved, the installation is convenient, the flow resistance is low, and the heat exchange efficiency is high.

Drawings

Fig. 1 is a schematic structural view of the middle and upper housing of the multi-way flow passage of the middle PTC water heater of the present invention.

Fig. 2 is a schematic sectional structure view of the multi-channel flow channel layer structure of the PTC water heater of the present invention.

As shown in the figure: 1-PTC heating element, 3-lower shell, 4-upper shell, 7-branch channel, 8-sealing element, 10-inlet, 11-outlet, 12-section width a, 13-section width b, 14-heat exchange fin, 15-convex plane and 20-groove.

Detailed Description

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

With reference to fig. 1 and 2, a PTC water heater multi-channel flow channel layer structure includes a lower housing 3, an upper housing 4 and a sealing element 8, at least one of the lower housing 3 and the upper housing 4 is attached to the PTC heating element, a groove 20 for installing the sealing element 8 is provided on the lower housing 3 or the upper housing 4, the lower housing 3 and the upper housing 4 are pressed into a sealed cavity by the sealing element 8, an inlet 10, an outlet 11 and two branch channels 7 with equal length are provided in the sealed cavity, the two branch channels 7 guide a flowing medium in the inlet 10 to the outlet 11 in a side-by-side manner, and after the lower housing 3 and the upper housing 4 are pressed, the flowing medium in the flow channel layer can only flow to the outlet 11 along the two branch channels 7 through the inlet 10.

Preferably, the two branch channels 7 have the same cross-sectional width 12, and the cross-sectional area of each branch channel 7 does not exceed 40 square millimeters.

Preferably, both said sub-runners 7 are made up of at least more than two full length paths, and the length of each sub-runner 7 does not exceed 1.2 meters.

The utility model discloses when concrete implementation, can adopt following scheme: the heat generated by the PTC heating element is conducted to the heat exchange fins 14 of the upper shell 4 through the raised plane 15 by tightly attaching the raised plane 15 on the upper shell 4 to the PTC heating element, the upper shell 4 is provided with a water inlet 10 and a water outlet 11 for water inlet and outlet, and the water inlet 10 and the water outlet 11 are communicated through two sub-channels arranged in the upper shell 4; the sub-runners are composed of S-shaped structures, so that the heat exchange area is increased, the heat exchange effect is improved, the sub-runners guide the inlet medium to the outlet in a parallel connection mode, the drainage effect is realized, and the flow resistance can be reduced; the upper shell 4 and the lower shell 3 are fastened and sealed together through screws. And a sealing element 8 is also arranged between the upper shell 4 and the lower shell 3, and the sealing element 8 is arranged in a groove 20 at the opening of the lower shell 3. The sub-runners are distributed and arranged in a parallel mode, and the flow resistance of the cooling medium is effectively reduced. The width of each branch channel is approximately the same, namely the section width a corresponding to 12 in the reference number and the section width b corresponding to 13 in the reference number, and the design avoids the problem that the flow resistance is increased when the cooling medium passes through the narrow side in the circulation process. In addition, since the four components of 12-section width a, 13-section width b, 14-heat exchange fins and 15-projection plane are not directly related to the flow channel junction layer structure, they are not mentioned in the claims.

The utility model discloses a theory of operation is: taking the average width of the heat exchange flow channel as an example of 5.4mm, cooling medium flows according to an arrow schematic diagram after entering the radiator flow channel from the water inlet, the width of the whole flow channel is uniform, no obvious water storing part exists, and the generation of vortex is avoided by the fillet structure at the corner.

The present invention and the embodiments thereof have been described above, but the description is not limited thereto, and the embodiment shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should understand that they should not be limited to the embodiments described above, and that they can design the similar structure and embodiments without departing from the spirit of the invention.

Claims

1. The utility model provides a PTC water heater multichannel runner layer structure which characterized in that: the PTC heating device comprises a lower shell (3), an upper shell (4) and a sealing element (8), wherein at least one of the lower shell (3) and the upper shell (4) is attached to the PTC heating element, a groove (20) for mounting the sealing element (8) is formed in the lower shell (3) or the upper shell (4), the lower shell (3) and the upper shell (4) are pressed into a sealing cavity through the sealing element (8), an inlet (10), an outlet (11) and two branch channels (7) with equal lengths are arranged in the sealing cavity, the two branch channels (7) lead flowing media in the inlet (10) to the outlet (11) in a side-by-side mode, and after the lower shell (3) and the upper shell (4) are pressed, the flowing media in a flowing channel layer can only flow to the outlet (11) through the inlet (10) along the two branch channels (7).

2. A PTC water heater multichannel flow channel layer structure as defined in claim 1, wherein: the flow channel section widths (12) of the two branch flow channels (7) are the same, and the sectional area of each branch flow channel (7) does not exceed 40 square millimeters.

3. A PTC water heater multichannel flow channel layer structure as defined in claim 1, wherein: the two sub-runners (7) are both composed of at least more than two full length paths, and the length of each sub-runner (7) is not more than 1.2 meters.