CN110243077B - Heat transfer shell for mounting PTC heating sheet - Google Patents
Heat transfer shell for mounting PTC heating sheet Download PDFInfo
- Publication number
- CN110243077B CN110243077B CN201910481529.2A CN201910481529A CN110243077B CN 110243077 B CN110243077 B CN 110243077B CN 201910481529 A CN201910481529 A CN 201910481529A CN 110243077 B CN110243077 B CN 110243077B
- Authority
- CN
- China
- Prior art keywords
- heat transfer
- ptc heating
- grooves
- heating sheet
- transfer shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 53
- 238000005266 casting Methods 0.000 claims abstract description 17
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 15
- 238000003801 milling Methods 0.000 claims abstract description 5
- 230000017525 heat dissipation Effects 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 15
- 238000005485 electric heating Methods 0.000 description 4
- 238000003754 machining Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1818—Arrangement or mounting of electric heating means
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
- H05B3/06—Heater elements structurally combined with coupling elements or holders
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Resistance Heating (AREA)
Abstract
The invention discloses a heat transfer shell for installing PTC heating sheets, which adopts an aluminum alloy casting piece, a plurality of grooves are formed in the heat transfer shell, and radiating ribs are arranged on the back surfaces of the grooves. According to the heat transfer shell for mounting the PTC heating sheet, the groove for placing the PTC heating sheet on the heat transfer shell is provided with the open port, and the groove can be rapidly subjected to secondary processing through tools such as a narrower saw blade or a milling cutter, so that the width and the verticality of the groove meet the design requirements, the contact gap between the PTC heating sheet and the aluminum alloy casting cooling ribs is reduced, the heat conduction efficiency is obviously improved, the PTC heating sheet is not easy to overheat and the service life of a product is further prolonged.
Description
Technical Field
The invention relates to the technical field of PTC electric heating of automobiles, in particular to a heat transfer shell structure for installing PTC heating sheets, which can be applied to the field of liquid heating of various automobiles.
Background
With the stricter regulations on emissions and fuel consumption, the market application of new energy automobiles is expanding. The electric heating liquid is adopted to heat the battery, and the electric heating applications such as automobile air conditioning and the like are more and more widely used.
The PTC electric heating is to apply high voltage of hundreds of volts to the PTC heating plate to heat the PTC heating plate and transfer the heat to the liquid medium to heat up, so as to realize heat exchange. The PTC heating sheet is placed on the heat transfer housing of the PTC heater.
Referring to fig. 1 and 2, a conventional heat transfer housing 1 is cast with a plurality of groups of elongated grooves 3, and heat dissipating ribs 5 are provided on the back surface of the grooves 3, wherein the heat dissipating ribs 5 are disposed in a liquid channel 4 in the heat transfer housing 1. The PTC heating sheet 2 is mounted in the groove 3. The grooves of the aluminum alloy castings are usually drawn by a drawing die, so that the grooves have inclination; and the grooves are usually closed and relatively deep, and difficult to process. In addition, the thickness of the PTC heating sheet is very thin, usually less than 5mm, in order to improve heat dissipation. In order to increase heat transfer, metal wedge blocks 6 are usually arranged on two sides of the heating plate when the PTC heating plate is installed, so that the PTC heating plate 2 is fixed in the groove 3. When the PTC heating sheet 2 is electrified to generate heat, heat is conducted to the metal wedge-shaped block 6 through the PTC heating sheet, the wedge-shaped block 6 conducts the heat to the heat dissipation rib 5, and the heat of the heat dissipation rib 5 is taken away by liquid in the liquid channel 4.
According to the structure, the wedge-shaped block 6 is added to enable the PTC heating sheet 2 to be well fixed in the groove of the heat transfer shell, heat of the PTC heating sheet 2 is simultaneously transferred to the heat dissipation ribs 5 more quickly, but the distance between the PTC heating sheet 2 and the groove of the aluminum alloy casting heat dissipation ribs is increased and the PTC heating sheet cannot be tightly attached to the aluminum alloy casting heat dissipation ribs, the heat dissipation effect of the PTC heating sheet is also deteriorated, and the heating sheet is easy to overheat and deform.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art, and aims to provide an improved heat transfer shell for installing a PTC heating sheet, which is convenient to process by changing a groove structure, ensures the width and the verticality of the groove, reduces the contact gap between the PTC heating sheet and an aluminum alloy casting heat dissipation rib, and improves the heat transfer efficiency.
In order to solve the problems, the invention adopts the following technical scheme: a heat transfer shell for installing PTC heating sheets adopts an aluminum alloy casting piece, a plurality of grooves are formed in the heat transfer shell, radiating ribs are arranged on the back surfaces of the grooves, and at least one end of each groove in the length direction is of an open structure.
According to the heat transfer shell for mounting the PTC heating sheet, the groove for placing the PTC heating sheet on the heat transfer shell is provided with the open port, and the groove can be rapidly subjected to secondary processing through tools such as a narrower saw blade or a milling cutter, so that the width and the verticality of the groove meet the design requirements, the contact gap between the PTC heating sheet and the aluminum alloy casting cooling ribs is reduced, the heat conduction efficiency is obviously improved, the PTC heating sheet is not easy to overheat and the service life of a product is further prolonged.
As an improvement of the invention, the bottom of the groove is vertical to the side surface of the groove. The PTC heating piece is of a sheet-shaped structure, so that the PTC heating piece is tightly attached to the side face of the groove, and the gap between the side face of the groove and the PTC heating piece is reduced.
Because the grooves are realized by machining, the precision is far higher than that of casting. Therefore, the fit clearance between the PTC heating piece and the groove is small, the efficiency of heat conduction to the groove and the radiating rib through the PTC heating piece is high, and the efficiency of heat conduction to the liquid in the liquid channel through the radiating rib is also high.
As an improvement of the invention, the groove can be open at one end or can be in an open structure at both ends. When the latter structure is adopted, the secondary operation is more favorable.
As a further improvement of the invention, the secondary working is performed by using a saw blade or a milling cutter.
As a further improvement of the invention, the heat transfer shell is also provided with guide ribs for guiding the flow of the heat exchange fluid, and the guide ribs and the heat transfer shell are integrally formed by casting aluminum alloy.
Drawings
Fig. 1 is a schematic view of a heat transfer case of a conventional PTC heater.
Fig. 2 is a view showing a state of use of a heat transfer case of a conventional PTC heater.
Fig. 3 is a perspective view of a heat transfer case for mounting a PTC heating sheet according to the present invention.
Fig. 4 is a longitudinal cross-sectional view of the heat transfer housing of the present invention.
Fig. 5 is a view showing a state of use of the heat transfer case of the present invention.
In the figure, a 1-heat transfer shell, a 2-PTC heating sheet, a 3-groove, a 4-liquid channel, a 5-heat radiating rib, a 6-wedge-shaped block, a 7-heat transfer shell, an 8-liquid channel, a 9-heat radiating rib, a 10-groove and an 11-PTC heating sheet 12-open port.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Fig. 1 and 2 are schematic views of a heat transfer case of a conventional PTC heater, the drawbacks of which have been described above and are not repeated here.
Referring to fig. 3 and 4, the heat transfer housing 7 of the PTC heater according to the present invention is an aluminum alloy casting, on which a plurality of grooves 10 are formed, and heat dissipation ribs 9 are provided on the back surface of the grooves 10, and the heat dissipation ribs 9 are immersed in the liquid channel 9 in the heat transfer housing 7. The groove 10 has an open structure at least at one end in the length direction.
According to the heat transfer shell for installing the PTC heating sheet, as the groove 10 for placing the PTC heating sheet on the heat transfer shell 7 is provided with the open port 12, the groove 10 can be rapidly subjected to secondary processing from the open port 12 through tools such as a narrower saw blade or a milling cutter, so that the width and the verticality of the groove 10 meet the design requirements, the contact gap between the PTC heating sheet and the aluminum alloy casting cooling ribs is reduced, the heat conduction efficiency is obviously improved, the PTC heating sheet is not easy to overheat and deform, and the service life of a product is further prolonged.
Meanwhile, as shown in fig. 5, since the groove 7 is realized by machining, the precision is far higher than that of casting. Therefore, the fit clearance between the PTC heating sheet 11 and the groove 7 is small, the efficiency of heat conduction to the groove 7 and the heat radiation rib 9 through the PTC heating sheet 11 is high, and the efficiency of heat conduction to the liquid in the liquid channel 8 through the heat radiation rib 9 is also high.
The heat transfer shell can be further provided with guide ribs 13 for guiding the flow of the heat exchange fluid, and the guide ribs 13 and the heat transfer shell are integrally formed by casting aluminum alloy. After the heat transfer housing is assembled with other housing components to form a liquid cavity, the guide ribs 13 and the heat dissipation ribs 9 can enable the liquid cavity to form a flow channel with a required structure.
It should be understood that: the above embodiments are merely illustrative of the present invention, not limiting, and any invention that does not fall within the spirit and scope of the present invention falls within the scope of the present invention.
Claims (4)
1. The heat transfer shell is an aluminum alloy casting piece, a plurality of grooves for installing the PTC heating pieces are formed in the heat transfer shell, and radiating ribs are arranged on the back surfaces of the grooves; the heat transfer shell and the grooves and the heat dissipation ribs on the heat transfer shell are integrally formed through aluminum alloy casting, then the width and the perpendicularity of the grooves reach the design requirements through secondary processing, the bottoms of the grooves are perpendicular to the sides of the grooves, the PTC heating plates are of sheet-shaped structures, the PTC heating plates are tightly attached to the sides of the grooves, and gaps between the sides of the grooves and the PTC heating plates are reduced.
2. A heat transfer case for mounting a PTC heating sheet according to claim 1 wherein the grooves have an open structure at both ends in the length direction.
3. A heat transfer case for mounting a PTC heating sheet according to claim 1, wherein the secondary working is a working using a saw blade or a milling cutter.
4. A heat transfer case for mounting a PTC heating sheet according to claim 1 wherein the heat transfer case is further provided with guide ribs for guiding the flow of the heat exchange fluid, and the guide ribs and the heat transfer case are integrally formed by casting an aluminum alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910481529.2A CN110243077B (en) | 2019-06-04 | 2019-06-04 | Heat transfer shell for mounting PTC heating sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910481529.2A CN110243077B (en) | 2019-06-04 | 2019-06-04 | Heat transfer shell for mounting PTC heating sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110243077A CN110243077A (en) | 2019-09-17 |
| CN110243077B true CN110243077B (en) | 2024-01-02 |
Family
ID=67885964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910481529.2A Active CN110243077B (en) | 2019-06-04 | 2019-06-04 | Heat transfer shell for mounting PTC heating sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110243077B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4698614A (en) * | 1986-04-04 | 1987-10-06 | Emerson Electric Co. | PTC thermal protector |
| JPH051195U (en) * | 1991-06-25 | 1993-01-08 | 瓊香 楊 | Electric heating device |
| CN202103871U (en) * | 2011-06-03 | 2012-01-04 | 深圳市赛尔盈电子有限公司 | Fixing structure for bearing plate of PTC radiator |
| WO2014000666A1 (en) * | 2012-06-27 | 2014-01-03 | Shenzhen Byd Auto R&D Company Limited | Ptc electric heating assembly, electric heating device and electric vehicle |
| CN103517467A (en) * | 2012-06-27 | 2014-01-15 | 比亚迪股份有限公司 | PTC electrical heating element, electric heater unit and electric car |
| CN206944497U (en) * | 2017-05-18 | 2018-01-30 | 石立冬 | A kind of PTC fluid heaters |
| CN210569267U (en) * | 2019-06-04 | 2020-05-19 | 浙江银轮机械股份有限公司 | Heat transfer shell for installing PTC heating sheet |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE602008002507D1 (en) * | 2007-08-27 | 2010-10-28 | Abb Research Ltd | Heat exchanger for power electronics components |
-
2019
- 2019-06-04 CN CN201910481529.2A patent/CN110243077B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4698614A (en) * | 1986-04-04 | 1987-10-06 | Emerson Electric Co. | PTC thermal protector |
| JPH051195U (en) * | 1991-06-25 | 1993-01-08 | 瓊香 楊 | Electric heating device |
| CN202103871U (en) * | 2011-06-03 | 2012-01-04 | 深圳市赛尔盈电子有限公司 | Fixing structure for bearing plate of PTC radiator |
| WO2014000666A1 (en) * | 2012-06-27 | 2014-01-03 | Shenzhen Byd Auto R&D Company Limited | Ptc electric heating assembly, electric heating device and electric vehicle |
| CN103517467A (en) * | 2012-06-27 | 2014-01-15 | 比亚迪股份有限公司 | PTC electrical heating element, electric heater unit and electric car |
| CN206944497U (en) * | 2017-05-18 | 2018-01-30 | 石立冬 | A kind of PTC fluid heaters |
| CN210569267U (en) * | 2019-06-04 | 2020-05-19 | 浙江银轮机械股份有限公司 | Heat transfer shell for installing PTC heating sheet |
Non-Patent Citations (1)
| Title |
|---|
| 张文.数控加工工艺与编程项目式教程.华中科技大学出版社,2016,第44页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110243077A (en) | 2019-09-17 |
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