Water channel structure and vehicle-mounted power supply

Abstract

The utility model discloses a water channel structure and a vehicle-mounted power supply, and relates to the technical field of new energy power supplies. The water channel filling and sealing bin is used for being detachably arranged in a shell of the vehicle-mounted power supply, the water channel filling and sealing bin is provided with a cooling water channel, and heat dissipation ribs are arranged in the cooling water channel. According to the water channel structure, the water channel filling and sealing bin is detachably connected with the shell of the vehicle-mounted power supply, the problem that a traditional welding bead occupies the bottom space is solved, the occupied space of the water channel filling and sealing bin is reduced, meanwhile, the water channel filling and sealing bin can be independently designed and manufactured, the production efficiency is improved, and the production cost is reduced. And moreover, the cooling ribs are arranged in the cooling water channel, so that the heat dissipation area of the cooling medium in the cooling water channel can be effectively increased, and the heat dissipation effect is improved.

Description

Technical Field

[0001] The present application relates to the field of new energy power supply technology, and more specifically, to a waterway structure and a vehicle-mounted power supply. Background Art

[0002] The vertical water channel sealing bin of a traditional on-board power supply is generally formed integrally with the shell, and the weld of the bottom sealing plate of the vertical water channel sealing bin will occupy a large space of the shell, resulting in a larger overall size of the radiator. At the same time, since the vertical water channel sealing bin is formed integrally with the shell, the space for installing power devices is relatively small, making it difficult to fix the power devices by gluing, and additional fixing devices can only be used to assist in fixing, resulting in a smaller contact area between the power devices and the water channel sealing bin and poor heat dissipation effect.

[0003] Therefore, how to improve the heat dissipation effect while reducing the space occupied by the water channel filling bin has become a technical problem that needs to be urgently solved by technical personnel in this field. Utility Model Content

[0004] In view of this, the purpose of the present application is to provide a water channel structure to improve the heat dissipation effect while reducing the space occupied by the water channel filling bin.

[0005] Another object of the present application is to provide a vehicle-mounted power supply having the above-mentioned water channel structure.

[0006] To achieve the above objectives, this application provides the following technical solutions:

[0007] A waterway structure, comprising:

[0008] The water channel sealing bin is used to be detachably arranged in the shell of the vehicle-mounted power supply. The water channel sealing bin is provided with a cooling water channel, and heat dissipation ribs are arranged in the cooling water channel.

[0009] Optionally, in the above-mentioned water channel structure, the water channel filling bin includes a bin body and a cooling water channel arranged on the bin body, and the bin body is a U-shaped structure formed by bending an extruded profile.

[0010] Optionally, in the above-mentioned water channel structure, the warehouse body has two oppositely arranged ends, and a heat dissipation chamber is provided through-through between the two ends of the warehouse body to form the cooling water channel in the heat dissipation chamber.

[0011] Optionally, in the above-mentioned water channel structure, a liquid inlet port and a liquid outlet port are provided on the warehouse body, and the liquid inlet port and the liquid outlet port are respectively used to connect to the cooling device of the vehicle-mounted power supply through a water channel adapter.

[0012] Optionally, in the above water channel structure, the water channel adapter includes a water nozzle elbow and a water nozzle fixing plate for fixing the water nozzle elbow, and the water nozzle elbow is used to connect to the liquid inlet port or the liquid outlet port.

[0013] Optionally, in the above water channel structure, the water nozzle elbow includes a first connecting portion for connecting to the water nozzle fixing plate and a second connecting portion for connecting to the liquid inlet port or the liquid outlet port. A water channel opening for communicating with the cooling device of the vehicle-mounted power supply is provided on the first connecting portion, and a jack for cooperating with the end of the bin body is provided on the second connecting portion, and the jack is respectively communicated with the cooling water channel and the water channel opening.

[0014] Optionally, in the above water channel structure, a sealing partition plate is provided in the water channel potting bin, and the sealing partition plate and the side wall of the water channel potting bin enclose a potting groove for filling potting glue.

[0015] Optionally, in the above water channel structure, ears for fixing the water channel potting bin are provided on the side wall of the water channel potting bin, and the ears are connected to the housing of the vehicle-mounted power supply through fasteners.

[0016] Optionally, in the above water channel structure, a plurality of heat dissipation ribs are distributed along the side wall of the cooling water channel, and the heat dissipation ribs penetrate through the cooling water channel to form a plurality of channels for the cooling medium to flow into in the cooling water channel.

[0017] A vehicle-mounted power supply includes a housing, power devices arranged in the housing, and a water channel structure as described in any one of the above for dissipating heat from the power devices.

[0018] Optionally, in the above vehicle-mounted power supply, the power device includes an aluminum substrate and power tubes arranged on the aluminum substrate, and the power device is fixed to the side of the water channel potting bin through a shrapnel structure.

[0019] Optionally, in the above vehicle-mounted power supply, the shrapnel structure includes a first mounting portion for connecting to the bottom plate of the housing and a second mounting portion for abutting against the aluminum substrate, and an elastic member is arranged between the second mounting portion and the first mounting portion.

[0020] The water channel structure provided by the present application, by detachably connecting the water channel potting bin to the housing of the vehicle-mounted power supply, avoids the problem that the traditional welding seam occupies the bottom space, reduces the occupied space of the water channel potting bin, and at the same time enables the water channel potting bin to be independently designed and manufactured, improves production efficiency, and reduces production costs. And, heat dissipation ribs are arranged in the cooling water channel, which can effectively increase the heat dissipation area of the cooling medium in the cooling water channel and improve the heat dissipation effect.

[0021] The technical features mentioned above, the technical features to be mentioned below, and the technical features shown separately in the drawings can be arbitrarily combined with each other, as long as the combined technical features are not contradictory. All feasible feature combinations are the technical contents clearly recorded in this article. Any one of the sub-features included in the same statement can be independently applied without necessarily being applied together with other sub-features. Brief Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0023] Figure 1 Structural schematic diagram of the water channel encapsulation bin provided by the embodiment of the present application;

[0024] Figure 2 Structural schematic diagram of the bin body provided by the embodiment of the present application;

[0025] Figure 3 Axonometric view of the vehicle-mounted power supply provided by the embodiment of the present application;

[0026] Figure 4 Top view of the vehicle-mounted power supply provided by the embodiment of the present application;

[0027] Figure 5 Structural schematic diagram of the power device provided by the embodiment of the present application.

[0028] Among them, 100 is the water channel encapsulation bin, 101 is the cooling water channel, 1011 is the pore channel, 102 is the heat dissipation rib, 1021 is the heat dissipation chamber, 103 is the bin body, 104 is the liquid inlet port, 105 is the liquid outlet port, 106 is the water channel adapter, 1061 is the water nozzle elbow, 1062 is the first connection part, 1063 is the second connection part, 1064 is the jack, 1065 is the water nozzle fixing plate, 107 is the sealing partition plate, 1071 is the encapsulation groove, 108 is the ear part;

[0029] 200 is the vehicle-mounted power supply, 201 is the housing, 202 is the power device, 2021 is the aluminum substrate, 2022 is the power tube, 203 is the elastic sheet structure, 2031 is the first installation part, 2032 is the second installation part. Detailed Description of the Embodiments

[0030] The core of the present application lies in providing a water channel structure to simplify the installation and disassembly steps of electrical connection while ensuring high reliability of electrical connection.

[0031] Another core of this application lies in providing a vehicle-mounted power supply having the above water channel structure.

[0032] Next, the technical solutions in the embodiments of this application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0033] With the rapid development of electric vehicles, the importance of its auxiliary systems such as on-board chargers (OBCs) has become increasingly prominent. As the core component of the energy conversion of electric vehicles, the OBC not only needs to meet higher power requirements, but also faces major challenges in thermal management. A large amount of heat is generated during the operation of the vehicle-mounted power supply, and effective thermal management is the key to ensuring its stable operation and extending its service life. The water channel potting bin can effectively fill the air gap between the electronic devices and the heat sink by using thermally conductive potting glue materials, improve the heat conduction efficiency, and protect the electronic components from damage.

[0034] The vertical water channel potting bin of the traditional vehicle-mounted power supply is generally integrally formed with the housing, and the weld bead of the bottom sealing plate of the vertical water channel potting bin will occupy a large space of the housing, resulting in a relatively large overall size of the radiator. At the same time, due to the integral formation of the vertical water channel potting bin and the housing, the space for installing power devices is relatively narrow, making it difficult to fix the power devices by gluing, and only additional fixing devices can be used for auxiliary fixing, resulting in a relatively small contact area between the power devices and the water channel potting bin and a poor heat dissipation effect.

[0035] In addition, during the high-temperature baking of the potting glue, the devices and structures outside the vertical water channel potting bin need to be heated together, wasting the space resources and power resources of the equipment, and reducing the transportation and turnover efficiency. At the same time, due to the material limitations of the die-cast parts of the vertical water channel potting bin, the die-casting process is difficult and complex, and the production efficiency is low.

[0036] For this reason, as Figure 1 and Figure 2 shown, the embodiments of this application disclose a water channel structure, including a water channel potting bin 100. By detachably connecting the water channel potting bin 100 to the housing 201 of the vehicle-mounted power supply 200, the problem of the traditional weld bead occupying the bottom space is avoided, the occupied space of the water channel potting bin 100 is reduced, and at the same time, the water channel potting bin 100 can be independently designed and manufactured, improving the production efficiency and reducing the production cost. And, heat dissipation ribs 102 are provided in the cooling water channel 101, which can effectively increase the heat dissipation area of the cooling medium in the cooling water channel 101 and improve the heat dissipation effect.

[0037] The following will combine Figure 1 and Figure 2 to specifically explain and illustrate the water channel structure disclosed in the embodiments of the present application.

[0038] Among them, the water channel potting bin 100 and the housing 201 of the vehicle-mounted power supply 200 adopt a split structure design. At the same time, the water channel potting bin 100 and the housing 201 of the vehicle-mounted power supply 200 are connected by a detachable connection method. And the water channel potting bin 100 is provided with a cooling water channel 101, and heat dissipation ribs 102 are arranged in the cooling water channel 101 to increase the contact area between the cooling medium and the cooling water channel 101, improve the heat exchange efficiency of the cooling medium, and thus improve the heat dissipation effect of the power device 202. Specifically, as Figure 3 and Figure 4 shown, the water channel potting bin 100 realizes the installation and positioning of the water channel potting bin 100 in the housing 201 of the vehicle-mounted power supply 200 through pin fitting, and uses fasteners to lock and fix it to the housing 201 of the vehicle-mounted power supply 200. At the same time, a sealing ring is used for sealing to prevent other components in the vehicle-mounted power supply 200 from being damaged due to leakage of the cooling medium. By using fasteners to connect and fix the water channel potting bin 100 to the housing 201 of the vehicle-mounted power supply 200, the problem that the welding bead occupies the bottom space when using the welding method can be avoided, the occupied space of the water channel potting bin 100 can be effectively reduced, and at the same time, the water channel potting bin 100 can be independently designed and manufactured, improving production efficiency and reducing production costs. In addition, the water channel potting bin 100 can fix the power device 202 outside the housing 201 of the vehicle-mounted power supply 200, providing a larger space for the installation of the power device 202. Thus, the power device 202 can be directly bonded to the side wall of the water channel potting bin 100 by using a thermosetting adhesive film, or an additional fixing device can be used to fix the power device 202, making the fixing method of the power device 202 more flexible and specifically selectable according to the actual situation.

[0039] As Figure 1 and Figure 2As shown, in a specific embodiment, the water channel encapsulation chamber 100 includes a chamber body 103 and a cooling water channel 101 provided on the chamber body 103. Among them, the cooling water channel 101 and the chamber body 103 can adopt a split structure or an integral structure. In this embodiment, the chamber body 103 adopts a U-shaped structure formed by bending an extruded profile, and the cooling water channel 101 and the chamber body 103 adopt an integral structure. Specifically, the chamber body 103 has two opposite ends. For the convenience of understanding, the two opposite ends of the chamber body 103 are respectively defined as the first end and the second end. A heat dissipation chamber 1021 is provided through the middle between the two ends of the chamber body 103 to form the cooling water channel 101 in the heat dissipation chamber 1021, that is, the cooling water channel 101 runs through from the first end of the chamber body 103 to the second end of the chamber body 103. At the same time, a plurality of heat dissipation ribs 102 are distributed along the height direction on the side wall of the cooling water channel 101. The heat dissipation ribs 102 can be integrally formed with the chamber body 103 by an extrusion process using a profile, and the heat dissipation ribs 102 run through the cooling water channel 101, that is, the heat dissipation ribs 102 run through from the first end of the chamber body 103 to the second end of the chamber body 103, so as to form a plurality of channels 1011 for the cooling medium to flow into in the cooling water channel 101, so that the cooling medium contacts the side walls around each channel 1011, thereby increasing the contact area between the cooling medium and the cooling water channel 101 and improving the heat dissipation effect of the power device 202.

[0040] Furthermore, as Figure 1 and Figure 2 shown, a liquid inlet port 104 and a liquid outlet port 105 are respectively provided at the two ends of the chamber body 103, and the liquid inlet port 104 and the liquid outlet port 105 are respectively connected to the cooling equipment of the vehicle-mounted power supply 200 through a water channel adapter 106. The water channel adapter 106 can improve the adaptability of the water channel encapsulation chamber 100, so that the water channel encapsulation chamber 100 can meet the connection of the cooling equipment of various vehicle-mounted power supplies 200.

[0041] As Figure 1As shown, in a specific embodiment, the waterway adapter 106 includes a water nozzle elbow 1061 and a water nozzle fixing plate 1065 for fixing the water nozzle elbow 1061. The water nozzle elbow 1061 is used to connect to the liquid inlet port 104 or the liquid outlet port 105. Specifically, the water nozzle elbow 1061 includes a first connecting portion 1062 connected to the water nozzle fixing plate 1065 and a second connecting portion 1063 connected to the liquid inlet port 104 or the liquid outlet port 105. A waterway port communicating with the cooling device of the vehicle-mounted power supply 200 is provided on the first connecting portion 1062, and a jack 1064 cooperating with the end of the bin body 103 is provided on the second connecting portion 1063, and the jack 1064 is respectively communicated with the cooling waterway 101 and the waterway port. In this embodiment, the water nozzle fixing plate 1065 is formed by a stamping process, and at the same time, two flow holes corresponding to the waterway ports of the water nozzle elbows 1061 of the liquid inlet port 104 and the liquid outlet port 105 are formed on the water nozzle fixing plate 1065, and first mounting holes are provided on the water nozzle fixing plate 1065 at intervals from the two flow holes. Second mounting holes cooperating with the first mounting holes are provided on the housing 201 of the vehicle-mounted power supply 200, so that the water nozzle fixing plate 1065 fixes the water nozzle elbow 1061 to the housing 201 of the vehicle-mounted power supply 200 through fasteners. At the same time, a prototype of the water nozzle elbow 1061 is formed by a profile extrusion process, and then the prototype is formed into the first connecting portion 1062 and the second connecting portion 1063 of the water nozzle elbow 1061 by shearing and machining methods, and a waterway port is formed on the first connecting portion 1062 by a machining method, and a jack 1064 is formed on the second connecting portion 1063, so as to machine and form the water nozzle elbow 1061. When assembling the waterway potting bin 100, first align the waterway ports of the two water nozzle elbows 1061 with the two flow holes of the water nozzle fixing plate 1065 respectively, and connect and fix the water nozzle elbow 1061 and the water nozzle fixing plate 1065 by a brazing welding method, so as to form the waterway adapter 106, and then insert the jack 1064 of the water nozzle elbow 1061 into the end of the bin body 103, and connect and fix it by a brazing welding method.

[0042] Further, a sealing partition plate 107 is arranged in the water channel potting bin 100, and the sealing partition plate 107 and the side wall of the water channel potting bin 100 enclose a potting groove 1071, so that potting glue can be filled in the potting groove 1071 of the water channel potting bin 100. Specifically, the sealing partition plate 107 is welded between the first end and the second end of the bin body 103 by brazing, so that a potting groove 1071 is formed between the sealing partition plate 107 and the bin body 103. Thus, by filling heat-conducting potting glue in the potting groove 1071 of the water channel potting bin 100, it can fill the tiny gaps between the electronic devices in the potting groove 1071 and the water channel potting bin 100. Through the high heat-conducting performance of the heat-conducting potting glue, heat can be effectively conducted from the heating element to the water channel potting bin 100, and then the cooling medium in the water channel potting bin 100 takes away the heat, so as to keep the normal working temperature of the electronic devices.

[0043] Further, ears 108 for fixing the water channel potting bin 100 are arranged on the side wall of the water channel potting bin 100. Among them, there are at least four ears 108, and the ears 108 are fixed on the side wall of the water channel potting bin 100 by brazing, and are connected and fixed to the housing 201 of the vehicle-mounted power supply 200 through fasteners, so as to realize the installation between the water channel potting bin 100 and the housing 201 of the vehicle-mounted power supply 200. At the same time, when installing the independent water channel potting bin 100, an end face sealing ring is used for sealing between the water nozzle elbow 1061 and the liquid inlet and outlet of the cooling device of the vehicle-mounted power supply 200, so as to prevent the cooling medium from leaking and damaging the electronic devices. It should be noted that the number of ears 108 can be four, five or more, and the specific number and arrangement can be set according to the actual situation to avoid the installation of other electronic devices.

[0044] It should be noted that the cooling medium in the above embodiments can adopt fluid media such as cooling water and oil, which are not limited herein.

[0045] As Figure 3 and Figure 4 shown, the embodiment of the present application also discloses a vehicle-mounted power supply, which includes a housing 201, a power device 202 arranged in the housing 201, and a water channel structure for dissipating heat from the power device 202. The water channel structure is the water channel structure disclosed in the above embodiment, so it has all the technical effects of the above water channel structure, which will not be elaborated herein.

[0046] Further, as Figure 5As shown, the power device 202 includes an aluminum substrate 2021 and a power transistor 2022 disposed on the aluminum substrate 2021. The power device 202 is fixed to the side of the water channel potting chamber 100 through a shrapnel structure 203. By cooperating the power transistor 2022 with the aluminum substrate 2021, an independent power template can be formed, and the power template is fixed to the side of the water channel potting chamber 100 by using the shrapnel structure 203, thereby reducing the occupied space of the power device 202 and making the size of the in-vehicle power supply smaller. At the same time, a silicone grease material is filled between the power template and the side of the water channel potting chamber 100 to conduct the heat of the power template into the water channel potting chamber 100 through the silicone grease material, and the heat is carried away by the cooling medium in the water channel potting chamber 100.

[0047] Further, as Figure 3 and Figure 4 shown, the shrapnel structure 203 includes a first mounting portion 2031 connected to the bottom plate of the housing 201 and a second mounting portion 2032 abutted against the aluminum substrate 2021. An elastic member is disposed between the second mounting portion 2032 and the first mounting portion 2031. Specifically, the elastic member can be a torsion spring, and one torsion arm of the torsion spring is connected to the first mounting portion 2031 of the shrapnel structure 203, and the other torsion arm of the torsion spring is connected to the second mounting portion 2032 of the shrapnel structure 203. When fixing the power device 202, the first mounting portion 2031 of the shrapnel structure 203 is fixed to the bottom plate of the housing 201 through a fastener, and at the same time, the elastic force of the torsion spring is used to make the second mounting portion 2032 of the shrapnel structure 203 abut against the power device 202, thereby realizing the installation and fixation of the power device 202. The shrapnel structure 203 can be two, three or more to fix multiple positions of the power device 202 and ensure the stability of the power device 202. It should be noted that the second mounting portion 2032 and the first mounting portion 2031 may not be connected by an elastic member, that is, the shrapnel structure 203 is an elastic member as a whole, so that there is an elastic force between the second mounting portion 2032 and the first mounting portion 2031. When fixing the power device 202, the second mounting portion 2032 of the shrapnel structure 203 can abut against the power device 202 by using the elastic force between the second mounting portion 2032 and the first mounting portion 2031. Of course, other fixing devices or fixing methods capable of fixing the power device 202 and the water channel potting chamber 100 can also be used for the power device 202, such as gluing, bolts, etc., which are not limited herein.

[0048] It should be noted that the fasteners in the above embodiments can be bolts, screws or rivets, etc., which are not limited herein.

[0049] In the description and claims of this application and the above-mentioned drawings, terms such as "first" and "second" are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may include steps or units that are not listed.

[0050] The above description of the disclosed embodiments enables those skilled in the art to implement or use this application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A water channel structure, characterized in that, Comprising: A water channel potting bin (100) for detachably being arranged inside a housing (201) of a vehicle-mounted power supply (200), the water channel potting bin (100) being provided with a cooling water channel (101), and heat dissipation ribs (102) being arranged inside the cooling water channel (101).

2. The water channel structure according to claim 1, characterized in that The water channel potting bin (100) includes a bin body (103), the cooling water channel (101) being arranged on the bin body (103), and the bin body (103) being a U-shaped structure formed by bending an extruded profile.

3. The water channel structure according to claim 2, wherein The bin body (103) has two opposite ends, and a heat dissipation chamber (1021) is arranged in a through manner between the two ends of the bin body (103) to form the cooling water channel (101) inside the heat dissipation chamber (1021).

4. The water channel structure according to claim 2, characterized in that, An inlet port (104) and an outlet port (105) are arranged on the bin body (103), and the inlet port (104) and the outlet port (105) are respectively used for being connected to a cooling device of the vehicle-mounted power supply (200) through a water channel adapter (106).

5. The water channel structure according to claim 4, characterized in that, The water channel adapter (106) includes a water nozzle elbow (1061) and a water nozzle fixing plate (1065) for fixing the water nozzle elbow (1061), and the water nozzle elbow (1061) is used for being connected to the inlet port (104) or the outlet port (105).

6. The water channel structure according to claim 5, characterized in that, The water nozzle elbow (1061) includes a first connection part (1062) for being connected to the water nozzle fixing plate (1065) and a second connection part (1063) for being connected to the inlet port (104) or the outlet port (105), a water channel port for being communicated with a cooling device of the vehicle-mounted power supply (200) being arranged on the first connection part (1062), a jack (1064) for cooperating with an end of the bin body (103) being arranged on the second connection part (1063), and the jack (1064) being respectively communicated with the cooling water channel (101) and the water channel port.

7. The water channel structure according to claim 1, wherein A sealing partition plate (107) is arranged inside the water channel potting bin (100), and the sealing partition plate (107) and the side wall of the water channel potting bin (100) enclose a potting groove (1071) for filling potting glue.

8. The water channel structure according to claim 1, characterized in that, Ears (108) for fixing the water channel potting bin (100) are arranged on the side wall of the water channel potting bin (100), and the ears (108) are connected to the housing (201) of the vehicle-mounted power supply (200) through fasteners.

9. The water channel structure according to any one of claims 1 to 8, characterized in that The heat dissipation ribs (102) are multiple and are distributed along the side wall of the cooling water channel (101), and the heat dissipation ribs (102) are arranged in a through manner inside the cooling water channel (101) to form multiple channels (1011) for cooling medium to flow into inside the cooling water channel (101).

10. A vehicle-mounted power supply, characterized in that, Comprising a housing (201), a power device (202) arranged inside the housing (201), and a water channel structure as described in any one of claims 1 to 9 for dissipating heat from the power device (202).

11. The vehicle-mounted power supply according to claim 10, characterized in that, The power device (202) includes an aluminum substrate (2021) and a power transistor (2022) disposed on the aluminum substrate (2021), and the power device (202) is fixed to the side of the water channel potting bin (100) through a shrapnel structure (203).

12. The vehicle-mounted power supply according to claim 11, wherein, The shrapnel structure (203) includes a first mounting portion (2031) for connecting to the bottom plate of the housing (201) and a second mounting portion (2032) for abutting against the aluminum substrate (2021), and an elastic member is disposed between the second mounting portion (2032) and the first mounting portion (2031).

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