Heating device, manufacturing method thereof and high-pressure liquid heater
By designing a non-bending heating core in a high-pressure liquid heater and increasing the contact area with the heat sink and the heat sink, the problems of low pressure resistance and heating efficiency in existing heaters are solved, and a more efficient heating effect is achieved.
Patent Information
- Application Number
- CN202311375708.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-10-20
- Publication Date
- 2025-04-22
AI Technical Summary
In the existing high-pressure liquid heaters, the bent form of the heating core makes it difficult to control the distance between the heating wire and the inner wall of the heating core, resulting in deterioration of insulation, reduced pressure resistance, and difficulty in increasing the working voltage. At the same time, the bend reduces the contact area with the medium to be heated and reduces the heating efficiency.
By designing a heating device, in which the heating core is no longer bent, but is accommodated by the heat sink, and a heat sink is arranged on the outside of the heat sink, so that the heating core and the medium to be heated are contacted through the heat sink, thereby increasing the contact area and heat transfer efficiency.
This design improves the pressure resistance of the heating core and the contact area with the medium to be heated, significantly improving the heating efficiency of the high-pressure liquid heater.
Smart Images
Figure CN119865938A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to a heating device and a manufacturing method for manufacturing the heating device. The present disclosure also relates to a high-pressure liquid heater comprising such a heating device. Background Art
[0002] The high-voltage liquid heater uses a heating wire encapsulated in the heating core to heat the liquid medium flowing through the heating core. In order to increase the contact area between the heating core and the medium to be heated, in the existing high-voltage liquid heater, the heating core is usually bent into a spiral coil shape. However, during the bending process, the distance between the heating wire in the heating core and the inner wall of the heating core is difficult to control, and there may be a part where the two are too close to each other, resulting in poor insulation and reduced voltage resistance. This makes it difficult to increase the operating voltage of such a high-voltage liquid heater.
[0003] If the heating core is not bent, the distance between the heating wire and the inner wall of the heating core can be controlled, thereby significantly improving the pressure resistance of the heating core, but this also reduces its contact area with the medium to be heated, reducing the heating efficiency of the high-pressure liquid heater. Summary of the invention
[0004] Therefore, the present disclosure aims to solve the above-mentioned problems, and its purpose is to provide a heating device which can increase the contact area between the heating core and the medium to be heated, thereby improving the heating efficiency of the high-pressure liquid heater.
[0005] The object is achieved by a heating device according to an embodiment of the present disclosure, the heating device comprising a heating core and a heat sink having a receiving portion for receiving the heating core and heat sinks arranged outside the receiving portion.
[0006] One of the purposes of the present disclosure is to provide a heating device, which can increase the contact area between the heating core and the medium to be heated and improve the heating efficiency of the high-pressure liquid heater. According to the heating device of the present disclosure, the heating core is accommodated in the accommodation portion of the heat sink, and a heat sink is arranged on the outside of the accommodation portion. The heating core of the heating device no longer contacts the medium to be heated, but contacts the medium to be heated through the heat sink. Therefore, the contact area between the heating device and the medium to be heated is larger and is not affected by the shape of the heating core.
[0007] The heating device according to the present disclosure may also have one or more of the following features alone or in combination.
[0008] According to an optional embodiment of the present disclosure, the heat sink and the heating core are formed as one body, so that there is no gap between them. This one-piece structure improves the heat transfer efficiency between the heat sink and the heating core, so that the heat generated by the heating core can be efficiently transferred to the medium to be heated through the heat sink.
[0009] According to an optional embodiment of the present disclosure, the accommodating portion of the heat sink is a hollow cavity with two ends open, and the heating core protrudes from the two ends of the accommodating portion. As will be described in detail below, this configuration of the heating core and the heat sink is conducive to forming an integrated heat sink on the heating core by die casting.
[0010] According to an optional embodiment of the present disclosure, the heating core comprises a shell and a heating element, and the heating element extends into the shell. The heating element is, for example, an electric heating wire.
[0011] According to an optional embodiment of the present disclosure, an insulating material is filled between the heating element and the shell. The filled insulating material can improve the insulation performance between the heating element and the shell to avoid electrical breakdown, and has good thermal conductivity to conduct the heat generated by the heating element to the shell. Exemplary insulating materials can be magnesium oxide powder, etc.
[0012] According to an optional embodiment of the present disclosure, the longitudinal direction of the heat sink follows the central axis of the heating core. The longitudinal direction of the heat sink is substantially parallel to the longitudinal direction of the heating core. The medium to be heated can flow along the longitudinal direction of the heat sink, thereby fully contacting the heat sink.
[0013] According to an optional embodiment of the present disclosure, the heat sink has a plurality of heat sinks extending outwardly from the accommodation portion in parallel with each other, or the heat sink has a plurality of heat sinks extending outwardly from the accommodation portion in radial direction.
[0014] According to an optional embodiment of the present disclosure, the central axis of the heating core extends in a straight line. That is, the heating core is not bent. The distance between the shell and the heating element in the heating core will not change uncontrollably due to bending, thereby ensuring that the heating core has sufficient pressure resistance.
[0015] According to an optional embodiment of the present disclosure, the heating core has a cylindrical shape.
[0016] According to an optional embodiment of the present disclosure, the heat sink is formed of an aluminum alloy material or a zinc alloy material.
[0017] According to an optional embodiment of the present disclosure, the heat sink is formed by die casting on the heating core. Die casting makes the material of the heating device continuous from the heating core to the heat sink, thereby improving the heat dissipation capacity of the heating device.
[0018] According to an optional embodiment of the present disclosure, the heating core is sealed in the receiving portion of the heat sink by a thermally conductive adhesive. That is, the heating core and the heat sink are formed separately, and then the heating core is inserted into the receiving portion of the heat sink. The gap between the heating core and the heat sink is filled with the thermally conductive adhesive. After the thermally conductive adhesive is sealed, the heating core and the heat sink are formed into one body. The thermally conductive adhesive also improves the heat conduction capacity from the heating core to the heat sink.
[0019] The present disclosure also provides a manufacturing method for manufacturing a heating device, comprising the following steps: providing a die-casting mold, the die-casting mold comprising a first half mold and a second half mold, the first half mold having a first half cavity and a gate connected to the first half cavity via a runner fluid, and the second half mold having a second half cavity; providing a heating core; separating the first half mold and the second half mold of the die-casting mold, and placing the heating core into the first half cavity or the second half cavity; combining the first half mold and the second half mold of the die-casting mold, the first half cavity and the second half cavity cooperate to form a cavity, and a cavity gap is provided between the outer wall of the heating core and the inner wall of the cavity; injecting molten die-casting material from the gate of the first half mold, so that the die-casting material flows into and fills the cavity gap through the runner; and cooling the die-casting material in the cavity gap to form a heat sink.
[0020] According to the manufacturing method, the heat sink is die-cast on the heating core, and the two form an integrated heating device.
[0021] According to an optional embodiment of the present disclosure, both ends of the first half cavity or the second half cavity have a reduced diameter portion matching the shape of the heating core. During the die casting process, the heating core can be placed on the reduced diameter portion.
[0022] According to an optional embodiment of the present disclosure, the cavity gap surrounds the heating core.
[0023] The present disclosure also relates to a high-pressure liquid heater, which comprises the heating device as described above. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The above and other features and advantages of the present disclosure will become more apparent through the following detailed description of exemplary embodiments in conjunction with the accompanying drawings, and the description and drawings are only for illustrative purposes and are not intended to limit the scope of the present disclosure in any way. The following drawings are not intentionally drawn to scale according to actual size, and the focus is on illustrating the subject matter of the present disclosure. In the drawings:
[0025] Figure 1 A heating device according to one embodiment of the present disclosure is shown.
[0026] Figure 2 and Figure 3 The heating core and the heat sink of the heating device are shown respectively.
[0027] Figure 4 A die-casting mold for manufacturing a heating device according to one embodiment of the present disclosure is shown.
[0028] Figure 5 is a cross-sectional view of the die-casting mold.
[0029] Figure 6 A schematic diagram showing the placement of a heating core on the die casting mold is shown.
[0030] Figure 7 A cross-sectional view of a die-casting mold after mold closing is shown, wherein a heating core has been placed on the die-casting mold.
[0031] Figure 8 The heating device is shown after the die casting is completed.
[0032] Throughout the drawings, the same or similar components are indicated by the same reference numerals. DETAILED DESCRIPTION
[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of them.
[0034] Unless otherwise defined, the technical terms or scientific terms used herein shall be the common meanings understood by ordinary technicians in the field to which the present disclosure belongs. The words "one", "an" or "the" and the like used in the patent application specification and claims of the present disclosure do not indicate a quantity limitation, but indicate the existence of at least one. The words "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The words "first", "second" and the like used in the patent application specification and claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. The words "connected" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
[0035] Various embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings. Here, it should be noted that in the accompanying drawings, the same reference numerals are given to components having substantially the same or similar structures and functions, and repeated descriptions thereof will be omitted.
[0036] See also Figure 1-Figure 3 The heating device 1 includes a heating core 10 and a heat sink 20. The heating core 10 generates heat and conducts it to the heat sink 20. The heating device 1 can be used for a high-pressure liquid heater, such as a high-pressure water heater for a new energy vehicle. In the high-pressure liquid heater, a medium to be heated, such as water, flows through the heating device 1 and is heated to provide heat to the vehicle's air conditioning system and battery heating system, etc.
[0037] The heating core 10 of the heating device 1 may have a typical structure of an electric heating tube, including a housing 11 and a heating element 12. The heating element 12 may be an electric heating wire, which extends into the housing 11 and is connected to an external power source to convert electrical energy into thermal energy. The heating element 12 is insulated from the housing 11 by an insulating material filled between the housing 11 and the heating element 12. The insulating material has good thermal conductivity and can conduct the heat generated by the heating element 12 to the housing 11. Exemplarily, the insulating material may be magnesium oxide powder.
[0038] refer to Figure 2 , the heating core 10 has a cylindrical shape, and its central axis X extends in a straight line direction. That is, there is no bend on the heating core 10. The advantage of the linear shape of the heating core 10 is that the distance between the heating element 12 and the shell 11 is controllable and will not change uncontrollably due to bending. This controllable distance makes it possible to improve the insulation performance between the heating element 12 and the shell 11, and the heating core 10 can withstand a higher voltage. Exemplarily, the withstand voltage of the heating core 10 can be increased from 2000V to more than 3000V.
[0039] refer to Figure 3 The heat sink 20 has a receiving portion 21 for receiving the heating core 10 and a heat sink 22 arranged outside the receiving portion 21. The heat generated by the heating core 10 is transferred to the heat sink 20. The heat sink 20 is formed of an aluminum alloy material or a zinc alloy material, etc., and has a high thermal conductivity. The longitudinal direction of the heat sink 22 follows the central axis X of the heating core 10 and extends outward from the receiving portion 21. Figure 3 In the illustrated embodiment, a plurality of heat sinks 22 extend outwardly in parallel with each other. It is conceivable that the heat sinks 22 may also extend radially outwardly from the accommodating portion 21. The medium to be heated flows between the heat sinks 22 and directly contacts the heat sinks 22, thereby being heated by the heating device 1. The heat sinks 22 increase the contact area between the heating device 1 and the medium to be heated, thereby improving the heating efficiency of the heating device 1.
[0040] As described above, the heating device 1 of the present disclosure improves the withstand voltage of the heating core 10 through the straight extension structure and increases the contact area with the medium to be heated through the heat sink 20 having the heat sink 22. As a result, the heating device 1 has a high heating efficiency. In the structure of the above-mentioned heating device 1, the heating efficiency can be further improved by eliminating the gap between the heating core 10 and the heat sink 22.
[0041] To this end, in the heating device 1 according to the preferred embodiment of the present disclosure, the heat sink 20 and the heating core 10 are formed as one body, so that there is no gap between the two. In the preferred embodiment, the heat sink 20 is formed by die casting on the heating core 10. Figure 4-6 A method for manufacturing a heating device 1 by die casting according to the present disclosure is introduced, the method comprising the following steps:
[0042] Step 1: Provide a die-casting mold 30; Figure 4 and Figure 5 As shown, the die-casting mold 30 includes a first half mold 30a and a second half mold 30b, wherein the first half mold 30a has a first half mold cavity 31a and a gate 33 fluidly connected to the first half mold cavity 31a via a runner 32, and the second half mold 30b has a second half mold cavity 31b, and both ends of the first half mold cavity 31a and the second half mold cavity 31b have a reduced diameter portion 34;
[0043] Step 2: providing a heating core 10. As mentioned above, the heating core 10 has a cylindrical shape;
[0044] Step 3: Separate the first half mold 30a and the second half mold 30b of the die-casting mold 30, and place the heating core 10 into the first half mold cavity 31a or the second half mold cavity 31b; Figure 6 The heating core 10 is placed in the second half cavity 31b. The shapes of the reduced diameter portions 34 at both ends of the second half cavity 31b match the shape of the heating core 10, so that the heating core 10 can be placed on the reduced diameter portions 34.
[0045] Step 4: The first half mold 30a and the second half mold 30b of the die-casting mold 30 are molded together, and the first half cavity 31a and the second half cavity 31b cooperate to form the cavity 31; Figure 7 As shown in the cross-sectional view, there is a cavity gap 35 between the outer wall of the heating core 10 and the inner wall of the cavity 31;
[0046] Step 5: injecting the molten die-casting material from the gate 33 of the first half mold 30a, so that the die-casting material flows into and fills the cavity gap 35 through the runner 32;
[0047] Step six: cooling the die-cast material in the cavity gap 35 to form the heat sink 20 . The cavity gap 35 is shaped so that the heat sink 20 has a receiving portion 21 for receiving the heating core 10 and heat sinks 22 arranged outside the receiving portion 21 .
[0048] Through the die casting manufacturing method, the heat sink 20 and the heating core 10 are integrated into the heating device 1. Thus, the heating device 1 has continuous material from the housing 11 of the heating core 10 to the heat sink 22, which improves the heat conduction capacity from the heating core 10 to the heat sink 22.
[0049] Optionally, the heat sink 20 may also be formed separately. After the heat sink 20 is formed, the heating core 10 is inserted into the receiving portion 21 of the heat sink 20, and the gap between the two is filled with thermal conductive adhesive. After the thermal conductive adhesive is sealed, the heating core 10 and the heat sink 20 are formed into one body, thereby also improving the heat conduction capacity from the heating core 10 to the heat sink 22.
[0050] According to another aspect of the present disclosure, a high-pressure liquid heater is provided, which includes the heating device as described above, can realize the functions of the heating device as described above, and has the advantages as described above.
[0051] Certain features, structures or characteristics in one or more embodiments of the present disclosure may be appropriately combined.
[0052] The above is an explanation of the present disclosure and should not be considered as a limitation thereof. Although several exemplary embodiments of the present disclosure are described, it will be readily appreciated by those skilled in the art that many modifications may be made to the exemplary embodiments without departing from the novel teachings and advantages of the present disclosure. Therefore, all such modifications are intended to be included within the scope of the present disclosure as defined in the claims. It should be understood that the above is an explanation of the present disclosure and the present disclosure should not be considered to be limited to the specific embodiments disclosed, and modifications to the disclosed embodiments and other embodiments are intended to be included within the scope of the present disclosure.
Claims
1. A heating device (1), characterized in that: The heating device (1) comprises: A heating core (10); The heat dissipation member (20) comprises a receiving portion (21) for receiving the heating core (10) and a heat dissipation fin (22) arranged outside the receiving portion (21).
2. The heating device (1) according to claim 1, characterized in that The heat sink (20) and the heating core (10) are formed as one body, so that there is no gap between them.
3. The heating device (1) according to claim 1, characterized in that The accommodating portion (21) of the heat sink (20) is a hollow cavity with openings at both ends, and the heating core (10) protrudes from both ends of the accommodating portion (21).
4. The heating device (1) according to claim 1, characterized in that The heating core (10) comprises a shell (11) and a heating element (12), wherein the heating element (12) extends into the shell.
5. The heating device (1) according to claim 4, characterized in that Insulating material is filled between the heating element (12) and the shell (11).
6. The heating device (1) according to any one of claims 1 to 5, characterized in that The longitudinal direction of the heat sink (22) follows the central axis (X) of the heating core (10).
7. The heating device (1) according to claim 6, characterized in that The heat sink (20) has a plurality of heat sinks (22) extending outwardly from the receiving portion (21) in parallel with each other, or The heat sink (20) has a plurality of heat sink fins (22) extending radially outward from the accommodation portion (21).
8. The heating device (1) according to any one of claims 1 to 5, characterized in that The central axis (X) of the heating core (10) extends in a straight line direction.
9. The heating device (1) according to claim 8, characterized in that The heating core (10) has a cylindrical shape.
10. The heating device (1) according to any one of claims 1 to 5, characterized in that The heat sink (20) is formed of an aluminum alloy material or a zinc alloy material.
11. The heating device (1) according to any one of claims 1 to 5, characterized in that The heat sink (20) is formed by die-casting on the heating core (10).
12. The heating device (1) according to any one of claims 1 to 5, characterized in that The heating core (10) is sealed in the accommodating portion (21) of the heat sink (20) by means of heat-conducting glue.
13. A method for manufacturing a heating device (1), characterized in that: The method comprises the following steps: A die-casting mold (30) is provided, wherein the die-casting mold (30) comprises a first half mold (30a) and a second half mold (30b), wherein the first half mold (30a) has a first half mold cavity (31a) and a gate (33) fluidically connected to the first half mold cavity (31a) via a runner (32), and the second half mold (30b) has a second half mold cavity (31b); Providing a heating core (10); Separating the first half mold (30a) and the second half mold (30b) of the die-casting mold (30), and placing the heating core (10) into the first half mold cavity (31a) or the second half mold cavity (31b); The first half mold (30a) and the second half mold (30b) of the die-casting mold (30) are combined, and the first half cavity (31a) and the second half cavity (31b) cooperate to form a cavity (31); wherein a cavity gap (35) is provided between the outer wall of the heating core (10) and the inner wall of the cavity (31); Injecting molten die-casting material from the gate (33) of the first half mold (30a) so that the die-casting material flows into and fills the cavity gap (35) through the runner (32); The die-cast material is cooled in the cavity gap (35) to be formed into a heat sink (20).
14. The manufacturing method according to claim 13, characterized in that: Both ends of the first half cavity (31a) or the second half cavity (31b) have reduced diameter portions (34) that match the shape of the heating core (10).
15. The manufacturing method according to claim 14, characterized in that: The cavity gap (35) surrounds the heating core (10).
16. A high pressure liquid heater, characterized in that: The high-pressure liquid heater comprises a heating device (1) according to any one of claims 1 to 12.