CN-115835428-B - Electric heating device for normal operation of normal temperature heat pipe in low temperature environment

CN115835428BCN 115835428 BCN115835428 BCN 115835428BCN-115835428-B

Abstract

The invention relates to the technical field of heating devices, in particular to an electric heating device for enabling a normal-temperature heat pipe to normally operate in a low-temperature environment, which comprises a base, an outer shell, a heat conducting piece, a PTC ceramic heating piece, a first fin group, a second fin group, the normal-temperature heat pipe and a fan assembly, wherein the heat conducting piece comprises a lower heat conducting plate and an upper heat conducting plate, and the PTC ceramic heating piece is clamped between the lower heat conducting plate and the upper heat conducting plate; the first fin group comprises a plurality of first radiating fins connected to the upper surface of the upper heat conducting plate, the second fin group comprises a plurality of second radiating fins arranged side by side at intervals, the normal-temperature heat pipe is L-shaped and provided with a plurality of horizontal pipe sections pressed in the corresponding heat conducting plate and vertical pipe sections penetrating into the second radiating fins, and the fan assembly comprises a fan fixing frame and a fan arranged between the first fin group and the second fin group and used for blowing heat at the first fin group to the second fin group. The invention can realize the normal operation of the normal temperature heat pipe in a low temperature environment and reduce the use cost.

Inventors

Bai Yonglai
WANG YIFAN

Assignees

郑州泰达精密机电有限公司

Dates

Publication Date: 20260508
Application Date: 20230107

Claims (4)

1. An electric heating apparatus for normally operating a normal temperature heat pipe in a low temperature environment, comprising: a base defining a longitudinal direction of the base as a left-right direction and a width direction of the base as a front-back direction; The heat conducting piece comprises a lower heat conducting plate and an upper heat conducting plate which are fixed on the base; The PTC ceramic heating piece is clamped between the lower heat conducting plate and the upper heat conducting plate, generates heat after being electrified and conducts heat transfer with the lower heat conducting plate and the upper heat conducting plate; a first fin group including a plurality of first heat radiating fins connected to an upper surface of the upper heat conductive plate and arranged side by side at intervals in a left-right direction, the first heat radiating fins extending in an up-down direction; the second fin group comprises a plurality of second radiating fins which are arranged at intervals in the up-down direction side by side, the second radiating fins extend along the left-right direction, and the second radiating fins and the first radiating fins are respectively positioned at the front side and the rear side of the upper heat conducting plate; The normal-temperature heat pipe is L-shaped and is provided with a plurality of horizontal pipe sections and vertical pipe sections, the horizontal pipe sections are pressed into the corresponding heat conducting plates, and the vertical pipe sections penetrate into the second radiating fins; The fan assembly comprises a fan fixing frame and a fan, wherein the fan fixing frame and the fan are arranged between the first fin group and the second fin group, and the fan is arranged on the fan fixing frame and used for blowing heat at the first fin group to the second fin group; The outer shell is arranged on the base, and a plurality of heat dissipation holes are formed in the outer shell at positions corresponding to the first fin group, the second fin group and the normal-temperature heat pipe; the upper surface of the lower heat-conducting plate is provided with an upper groove corresponding to each normal-temperature heat pipe, the horizontal pipe section of the normal-temperature heat pipe is assembled in the upper groove in an interference manner, and the upper surface of the horizontal pipe section is a plane flush with the upper surface of the lower heat-conducting plate; Or the lower surface of the upper heat conducting plate is provided with a lower groove corresponding to each normal-temperature heat pipe, the horizontal pipe section of the normal-temperature heat pipe is assembled in the lower groove in an interference manner, and the lower surface of the horizontal pipe section is a plane flush with the lower surface of the lower heat conducting plate; The left side and the right side of the first fin group are respectively penetrated with a reinforced heat pipe, and the bottom of the reinforced heat pipe is fixedly connected with the upper surface of the lower heat conducting plate; the lower heat conducting plate and the upper heat conducting plate are both aluminum plates; The fan fixing frame comprises a mounting plate and turning plates which are integrally formed on the left side, the right side and the upper side of the mounting plate, the mounting plate and the turning plates enclose a positioning groove for positioning the second fin group, the fan is fixed on one side of the mounting plate, which is opposite to the second fin group, and an adaptive vent hole is formed in the position, corresponding to the fan, of the mounting plate; the bottom of the mounting plate is provided with an avoidance port for avoiding the upper heat conducting plate, the lower heat conducting plate and the PTC ceramic heating sheet, and a plate section part of the mounting plate positioned at two sides of the avoidance port is fixedly connected with the base.
2. The electric heating device for normal operation of a normal temperature heat pipe in a low temperature environment according to claim 1, wherein the reinforced heat pipe is U-shaped and comprises an upper horizontal section, a lower horizontal section and a vertical connecting section, the lower horizontal section and the upper horizontal section respectively penetrate through a plurality of first radiating fins, the bottom of the lower horizontal section is fixedly connected with the upper surface of the lower heat conducting plate, and the vertical connecting section is positioned outside the first fin group.
3. The electric heating device for enabling the normal-temperature heat pipe to normally operate in a low-temperature environment according to claim 2, wherein the first radiating fin is provided with an avoidance groove for the lower horizontal section to pass through and a first perforation for the upper horizontal section to pass through, the first radiating fin is provided with a first communication hole communicated with the first perforation at a position corresponding to the first perforation, the second radiating fin is provided with a second perforation for the vertical section to pass through, and the second radiating fin is provided with a second communication hole or a communication gap communicated with the second perforation at a position corresponding to the second perforation.
4. An electric heating apparatus for enabling a normal temperature heat pipe to normally operate in a low temperature environment according to any one of claims 1 to 3, wherein the second fin group is provided with at least two groups at intervals in the left-right direction, and the arrangement length of the first heat radiating fins in the left-right direction is not less than the sum of the arrangement lengths of the second heat radiating fins in the left-right direction in the respective second fin groups.

Description

Electric heating device for normal operation of normal temperature heat pipe in low temperature environment Technical Field The invention relates to the technical field of heating devices, in particular to an electric heating device for enabling a normal-temperature heat pipe to normally operate in a low-temperature environment. Background The heat pipe is a phase change process (i.e. utilizing the latent heat of evaporation and condensation of liquid) by which the medium condenses at the cold end after the hot end evaporates, so that heat is rapidly conducted. The heat pipes can be divided into low-temperature heat pipes (-273-0 ℃), normal-temperature heat pipes (0-250 ℃), medium-temperature heat pipes (250-450 ℃) and high-temperature heat pipes (450-1000 ℃) according to the working temperature in the heat pipes. The conventional heat pipe is a normal-temperature heat pipe, which can be used for heat dissipation on automobiles, but the running environment of the automobiles is complex and various, especially in winter, the outdoor temperature in northeast areas can reach-30 ℃ or even lower, and the working temperature of the normal-temperature heat pipe is not reached at the moment, so that the normal-temperature heat pipe cannot be normally started for heat conduction, and the low-temperature heat pipe can be used in the extreme environment, but has complex process and high use cost and cannot meet the batch use of radiators on automobiles. Disclosure of Invention In view of the above problems, an object of the present invention is to provide an electric heating device that enables normal temperature heat pipes to operate normally in a low temperature environment, to achieve normal operation of normal temperature heat pipes in a low temperature environment, and to reduce use cost. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: an electric heating device for enabling a normal-temperature heat pipe to normally operate in a low-temperature environment, comprising: a base defining a longitudinal direction of the base as a left-right direction and a width direction of the base as a front-back direction; The heat conducting piece comprises a lower heat conducting plate and an upper heat conducting plate which are fixed on the base; The PTC ceramic heating piece is clamped between the lower heat conducting plate and the upper heat conducting plate, generates heat after being electrified and conducts heat transfer with the lower heat conducting plate and the upper heat conducting plate; a first fin group including a plurality of first heat radiating fins connected to an upper surface of the upper heat conductive plate and arranged side by side at intervals in a left-right direction, the first heat radiating fins extending in an up-down direction; the second fin group comprises a plurality of second radiating fins which are arranged at intervals in the up-down direction side by side, the second radiating fins extend along the left-right direction, and the second radiating fins and the first radiating fins are respectively positioned at the front side and the rear side of the upper heat conducting plate; The normal-temperature heat pipe is L-shaped and is provided with a plurality of horizontal pipe sections and vertical pipe sections, the horizontal pipe sections are pressed into the corresponding heat conducting plates, and the vertical pipe sections penetrate into the second radiating fins; The fan assembly comprises a fan fixing frame and a fan, wherein the fan fixing frame and the fan are arranged between the first fin group and the second fin group, and the fan is arranged on the fan fixing frame and used for blowing heat at the first fin group to the second fin group; The shell body is arranged on the base, and a plurality of heat dissipation holes are formed in the shell body at positions corresponding to the first fin group, the second fin group and the normal-temperature heat pipe. The technical scheme has the advantages that the PTC ceramic heating sheet generates heat after being electrified, the heat is transferred through the upper heat conducting plate and the lower heat conducting plate, the horizontal pipe section of the normal-temperature heat pipe is pressed in the corresponding heat conducting plate, so that the heat generated by the PTC ceramic heating sheet can be transferred to the horizontal pipe section through the heat conducting plate at the corresponding position to heat the horizontal pipe section of the normal-temperature heat pipe, the heat is transferred to the first fin group and the second fin group at the front side and the rear side through the upper heat conducting plate, the heat is transferred to the vertical pipe section of the normal-temperature heat pipe through the second fin group, and the fan is arranged between the first fin group and the second fin group. The electric heating device can heat the normal-temperature he