A new energy vehicle heat dissipation box

Abstract

The application discloses a new energy automobile heat dissipation box, and relates to the technical field of heat dissipation box installation, which comprises a protective shell, a heat dissipation box is arranged in the inner cavity of the protective shell, a circular hole is arranged in the side wall of the protective shell, heat dissipation air inlets are symmetrically arranged on the two sides of the protective shell, the number of the heat dissipation air inlets is not less than two, and an opening and closing assembly is arranged on the side wall of the protective shell. Through the cooperation of the opening and closing assembly and the scraping assembly, the protective shell can be closed in cold weather, so that the heat dissipation box is in a closed environment, and the heat generated by the operation of the new energy automobile can be concentrated around components such as the warm air water tank in the vehicle, thereby achieving the effect of rapid heating. In addition, the opening and closing gap of the opening and closing plate can be properly adjusted in cold weather, so that the situation that the temperature is lost too quickly due to the excessively large opening and closing gap of the opening and closing plate in cold weather can also be avoided.

Description

Technical Field

[0001] This invention relates to the field of heat sink installation technology, specifically a heat sink for new energy vehicles. Background Technology

[0002] In cold weather, if the cooling system of a new energy vehicle is working properly, the heat generated by the motor and other components will dissipate quickly. The main function of the radiator is to transfer heat to the surface of the radiator through the circulation of coolant. Under normal circumstances, the radiator's cooling fins exchange heat with the cold air, and the heat is carried away by the cold air. However, in cold weather, if the heat loss of the radiator is too fast, the motor of the new energy vehicle will not be able to start quickly.

[0003] Meanwhile, during the operation of new energy vehicles, impurities and other foreign objects may enter the ventilation openings, causing blockages and reducing airflow. This can affect the entry of outside air into the radiator, leading to poor air circulation and damage. Furthermore, when the radiator is installed on a new energy vehicle without a protective shell, it can be damaged by impacts during bumpy road conditions or minor collisions. In contrast, when a protective shell is present, replacing or repairing the radiator requires a complex disassembly of the shell, thus prolonging the process of replacing the radiator.

[0004] Therefore, a heat dissipation box for new energy vehicles is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a heat dissipation box for new energy vehicles to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a heat dissipation box for a new energy vehicle, comprising a protective outer shell, a heat dissipation box being disposed within the inner cavity of the protective outer shell, a circular hole being formed in the side wall of the protective outer shell, and at least two heat dissipation vents being symmetrically formed on both sides of the protective outer shell, wherein the heat dissipation vents are provided, and an opening and closing assembly is provided on the side wall of the protective outer shell, the opening and closing assembly comprising an electric telescopic rod fixedly connected to the top of the protective outer shell, a fixed rod being fixedly connected to the telescopic shaft end of the electric telescopic rod, a connecting rod 1 being rotatably connected to the side of the fixed rod near the protective outer shell, a connecting rod 2 being rotatably connected to the end of the connecting rod 1 away from the fixed rod, a fixed frame being fixedly connected to the side of the protective outer shell near the electric telescopic rod, a fixed frame being fixedly connected to the side wall of the protective outer shell, a plurality of rotating columns being rotatably connected to the side of the fixed frame near the protective outer shell, a rotating rod 1 being fixedly connected to the outer side of the plurality of rotating columns, and an opening and closing plate being fixedly connected to the end of the plurality of rotating columns away from the fixed frame.

[0007] Furthermore, the protective housing is provided with a scraping assembly on its side wall. The scraping assembly includes a rotating rod two rotatably connected to the bottom of the fixed rod. A rotating disk is rotatably connected to the bottom of the rotating rod two. A sleeve is fixedly connected to the outer side of one of the heat dissipation vents.

[0008] Furthermore, the scraping assembly also includes five strip-shaped holes annularly formed on the rotating disk, each strip-shaped hole having a rotating rod three slidably connected inside, each rotating rod three having an arc-shaped rubber block fixedly connected to one end away from the strip-shaped hole, and the sleeve having five fixed cylinders fixedly connected to one side near the arc-shaped rubber block.

[0009] Furthermore, the protective housing is provided with a quick-installation assembly, which includes a fixing plate fixedly connected to the bottom of the inner cavity of the protective housing. The fixing plate has symmetrical sliding openings. A rotating handle is rotatably connected to the bottom of the fixing plate. A rotating rod is fixedly connected to the bottom of the rotating handle. A handle is fixedly connected to the bottom of the rotating rod. A connecting post is symmetrically rotatably connected to the bottom of the rotating handle.

[0010] Furthermore, the quick-installation assembly also includes sliding rods symmetrically slidably connected to the bottom of the fixing plate. Each sliding rod has two connecting rods three symmetrically fixedly connected to its top. A rubber pad is fixedly connected between every two connecting rods three. The bottom of the protective housing has multiple threaded holes, and threaded rods are threadedly connected to the inside of the threaded holes.

[0011] Furthermore, the end of the rotating rod away from the rotating column is rotatably connected to the connecting rod, and the outer side of the rotating column is rotatably connected to the protective shell.

[0012] Furthermore, the plurality of rotating columns are arranged in a linear array with the fixed frame close to the protective housing side, and the dimensions between two adjacent opening and closing plates are adapted to each other.

[0013] Furthermore, the outer side of the sleeve is rotatably engaged with the rotating disk, and the outer side of the fixed cylinder is rotatably connected to the arc-shaped rubber block.

[0014] Furthermore, the outer side of the rotating rod four is rotatably connected to the bottom of the protective shell.

[0015] Furthermore, the end of each connecting post away from the rotating handle is rotatably connected to the sliding rod, the connecting rod is slidably adapted to the inside of the sliding port, and the top of the fixing plate abuts against the heat dissipation box.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The cooperation between the opening and closing components and the scraping components enables the protective shell to be closed in cold weather, thus keeping the radiator in a sealed environment. This prevents heat from dissipating too quickly to the outside environment in cold weather. The heat generated by the operation of new energy vehicles is concentrated around components such as the heater core inside the vehicle, thus achieving rapid heating. At the same time, properly adjusting the opening and closing gap of the opening and closing plate in cold weather can also prevent the temperature from falling too quickly due to excessively large gaps, and can also prevent the rapid entry of cold air from causing condensation when hot and cold air come into contact.

[0018] The scraping component prevents dust and impurities from accumulating on the surface of the cooling vents, ensuring unobstructed airflow and allowing cool air to enter the radiator smoothly. This prevents impurities from entering the cooling vents and causing blockages during the operation of new energy vehicles, thus avoiding damage caused by excessively high temperatures in the radiator due to blocked vents.

[0019] The quick-install components and protective shell design allow installers to quickly place the radiator in the appropriate position, ensuring correct relative positioning between the radiator and other components. This allows for rapid and accurate installation, as the radiator can be quickly secured inside the protective shell. The protective shell effectively prevents rainwater, dust, and mud from entering the radiator. Furthermore, during the operation of new energy vehicles, the protective shell absorbs and disperses impact forces from minor scratches or collisions, reducing damage to the radiator. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a three-dimensional schematic diagram of the protective shell and heat dissipation vent structure of the present invention;

[0022] Figure 3 This is a cross-sectional schematic diagram of the protective outer shell structure of the present invention;

[0023] Figure 4 This is a three-dimensional schematic diagram of the electric telescopic rod, fixed rod, and connecting rod of the present invention;

[0024] Figure 5 For the present invention Figure 4 Enlarged schematic diagram of the structure at point A in the middle;

[0025] Figure 6 This is a cross-sectional schematic diagram of the protective outer shell structure of the present invention;

[0026] Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at point B;

[0027] Figure 8 This is a three-dimensional schematic diagram of the electric telescopic rod and fixed rod structure of the present invention;

[0028] Figure 9 For the present invention Figure 8 Enlarged schematic diagram of the structure at point C;

[0029] Figure 10 This is a three-dimensional schematic diagram of the rotating rod 2, the rotating disk and the sleeve structure of the present invention;

[0030] Figure 11 This is a three-dimensional schematic diagram of the scraping component structure of the present invention;

[0031] Figure 12 This is a three-dimensional schematic diagram of the fixing plate and protective shell structure of the present invention;

[0032] Figure 13 This is a three-dimensional schematic diagram of the quick-installation component structure of the present invention;

[0033] Figure 14 For the present invention Figure 13 Enlarged schematic diagram of the structure at point D;

[0034] Figure 15 This is a three-dimensional schematic diagram of the threaded hole and threaded rod structure of the present invention.

[0035] In the picture:

[0036] 1. Protective outer casing; 2. Heat sink; 3. Round hole; 4. Heat dissipation vent;

[0037] Opening and closing components: 5. Electric telescopic rod; 6. Fixed rod; 7. Connecting rod one; 8. Connecting rod two; 9. Fixed frame; 10. Rotating rod one; 11. Rotating column; 12. Opening and closing plate;

[0038] Scraping components: 13. Rotating rod two; 14. Rotating disk; 15. Sleeve; 16. Strip hole; 17. Rotating rod three; 18. Arc-shaped rubber block; 19. Fixed cylinder;

[0039] Quick-installation components: 20. Fixing plate; 21. Sliding port; 22. Rotating handle; 23. Rotating rod four; 24. Handle; 25. Connecting post; 26. Sliding rod; 27. Connecting rod three; 28. Rubber pad; 29. ​​Threaded hole; 30. Threaded rod. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0041] Please see Figures 1 to 15 This invention provides an embodiment of a new energy vehicle heat sink, comprising a protective shell 1, a top cover threadedly connected to the top of the protective shell 1, a heat sink 2 disposed within the inner cavity of the protective shell 1, and a circular hole 3 formed on the side wall of the protective shell 1. The heat sink 2 is connected to the motor of the new energy vehicle through the circular hole 3, thereby enabling the motor of the new energy vehicle to achieve cooling. At least two heat dissipation vents 4 are symmetrically formed on both sides of the protective shell 1. An opening and closing assembly is provided on the side wall of the protective shell 1, including an electric telescopic rod 5 fixedly connected to the top of the protective shell 1. A fan module is fixedly installed on the heat dissipation vent 4 on the side of the protective shell 1 away from the electric telescopic rod 5, for blowing external air into the protective shell 1. The telescopic shaft end of the electric telescopic rod 5... A fixed rod 6 is fixedly connected. A connecting rod 7 is rotatably connected to the side of the fixed rod 6 near the protective shell 1. A connecting rod 8 is rotatably connected to the end of the connecting rod 7 away from the fixed rod 6. A fixed frame 9 is fixedly connected to the side of the protective shell 1 near the electric telescopic rod 5. Multiple rotating columns 11 are rotatably connected to the side of the fixed frame 9 near the protective shell 1. The outer side of the rotating columns 11 is rotatably connected to the protective shell 1. The multiple rotating columns 11 are arranged in a linear array with the side of the fixed frame 9 near the protective shell 1. A rotating rod 10 is fixedly connected to the outer side of the multiple rotating columns 11. The end of the rotating rod 10 away from the rotating column 11 is rotatably connected to the connecting rod 8. An opening and closing plate 12 is fixedly connected to the end of the multiple rotating columns 11 away from the fixed frame 9. The dimensions between two adjacent opening and closing plates 12 are mutually compatible.

[0042] The protective housing 1 has a scraping assembly on its side wall. The scraping assembly includes a rotating rod 13 rotatably connected to the bottom of the fixed rod 6. The rotating rod 13 is located on the side of the fixed rod 6 away from the connecting rod 7. The bottom of the rotating rod 13 is rotatably connected to a rotating disk 14. The rotating rod 13 is rotatably connected to the eccentric part of the rotating disk 14. A sleeve 15 is fixedly connected to the outside of the heat dissipation vent 4 on the side of the protective housing 1 near the electric telescopic rod 5. The outside of the sleeve 15 is rotatably engaged with the rotating disk 14.

[0043] The scraping assembly also includes five strip holes 16 annularly formed on the rotating disk 14. Each strip hole 16 is slidably connected to a rotating rod 17. An arc-shaped rubber block 18 is fixedly connected to one end of each rotating rod 17 away from the strip hole 16. Five fixed cylinders 19 are fixedly connected to the side of the sleeve 15 near the arc-shaped rubber block 18. The outer side of the fixed cylinders 19 is rotatably connected to the arc-shaped rubber block 18.

[0044] The protective housing 1 is equipped with a quick-installation assembly, which includes a fixing plate 20 fixedly connected to the bottom of the inner cavity of the protective housing 1. The top of the fixing plate 20 abuts against the heat dissipation box 2. The fixing plate 20 has symmetrical sliding openings 21. The bottom of the fixing plate 20 is rotatably connected to a rotating handle 22. The bottom of the rotating handle 22 is fixedly connected to a rotating rod 23. The outer side of the rotating rod 23 is rotatably connected to the bottom of the protective housing 1. The bottom of the rotating rod 23 is fixedly connected to a handle 24. The bottom of the rotating handle 22 is symmetrically rotatably connected to a connecting post 25.

[0045] The quick-installation assembly also includes sliding rods 26 symmetrically slidably connected to the bottom of the fixed plate 20. The end of each connecting post 25 away from the rotating handle 22 is rotatably connected to the sliding rod 26. Two connecting rods 27 are symmetrically fixedly connected to the top of each sliding rod 26. The connecting rods 27 are slidably adapted to the inside of the sliding port 21. A rubber pad 28 is fixedly connected between every two connecting rods 27. The bottom of the protective shell 1 has a plurality of threaded holes 29 in a ring. The threaded rods 30 are threadedly connected to the inside of the threaded holes 29.

[0046] The working principle of the above implementation is as follows:

[0047] The initialization steps are as follows:

[0048] The staff opened the top cover of the protective shell 1, and then put the heat sink 2 into the inner cavity of the protective shell 1, so that the protective shell 1 and the top of the fixing plate 20 came into contact with each other.

[0049] The operation steps are as follows:

[0050] The operating steps of the opening and closing component are as follows:

[0051] After the electric telescopic rod 5 is powered on, it begins to extend vertically downwards. This causes the electric telescopic rod 5 to drive the fixed rod 6 to move vertically downwards. Consequently, the fixed rod 6 pushes the connecting rod 7 downwards in the vertical direction, causing the connecting rod 7 to push the connecting rod 8 to move synchronously in the vertical direction. As a result, the connecting rod 8 drives multiple rotating rods 10 to rotate counterclockwise around the connection point with the rotating column 11. The connecting rod 8 is also subjected to the reaction force of the multiple rotating rods 10 and moves away from the rotating rods 10. Therefore, the design of the connecting rod 7 avoids the possibility of jamming when the connecting rod 8 moves in an arc. The rotating rod 10 drives the rotating column 11 to rotate counterclockwise around the connection point between the rotating column 11 and the fixed frame 9. As a result, the multiple rotating columns 11 drive multiple opening and closing plates 12 to swing simultaneously towards the top of the protective shell 1. Thus, the multiple opening and closing plates 12 swing from a horizontal position to a vertical position, forming a closed plate.

[0052] The steps for scraping the component are as follows:

[0053] As described above, when the electric telescopic rod 5 extends vertically downwards, it drives the fixed rod 6 to move vertically downwards. This causes the fixed rod 6 to push the rotating rod 13 to move synchronously. Consequently, the rotating rod 13 drives the rotating disk 14 to rotate counterclockwise. The rotating disk 14 then causes the rotating rod 13 to move in an arc. The counterclockwise rotation of the rotating disk 14 is reflected in the sleeve 15. The strip-shaped hole 16 on the rotating disk 14, through its inner wall, pushes the rotating rod 17 to slide inside the strip-shaped hole 16. This causes the rotating rod 17 to push the arc-shaped rubber block 18 to move axially towards the center of the heat dissipation vent 4, thus... The five arc-shaped rubber blocks 18 move simultaneously toward the center of the heat dissipation vent 4. Thus, the five arc surfaces of the five arc-shaped rubber blocks 18 near the strip hole 16 form a circle, thereby sealing the surface of the heat dissipation vent 4. When the fan on the side of the heat dissipation vent 4 away from the rotating disk 14 stops working, the operator can drive the electric telescopic rod 5 to extend and retract periodically. When the electric telescopic rod 5 retracts, the above working steps are repeated in reverse. Therefore, when the electric telescopic rod 5 extends and retracts multiple times periodically, the five arc-shaped rubber blocks 18 continuously scrape the surface of the heat dissipation vent 4.

[0054] The scraping component prevents dust and impurities from accumulating on the surface of the cooling vent 4, ensuring its unobstructed flow and allowing cool air to enter the heat exchanger 2 smoothly. This prevents impurities from entering the cooling vent 4 and causing blockages during the operation of the new energy vehicle, thus avoiding damage to the heat exchanger 2 caused by excessively high temperatures due to blocked cooling vent 4.

[0055] The cooperation between the opening and closing components and the scraping components enables the protective shell 1 to be closed in cold weather, thus keeping the heat sink 2 in a closed environment. This prevents heat from being dissipated too quickly to the outside environment in cold weather. The heat generated by the operation of the new energy vehicle will be concentrated around the heater core and other components inside the vehicle, thus achieving rapid heating. At the same time, by properly adjusting the opening and closing gap of the opening and closing plate 12 in cold weather, it is also possible to avoid the situation where the temperature loss is too fast due to the gap of the opening and closing plate 12 being too large, and it can also prevent the rapid entry of external cold air and the contact between cold and hot air, which would cause water droplets to form.

[0056] The steps for quickly installing components are as follows:

[0057] As in the initialization steps, when the heat sink 2 and the upper surface of the fixing plate 20 are in contact, the operator first unscrews the threaded rod 30 out of the threaded hole 29, so that the rotation of the handle 24 is no longer restricted. Then, the operator manually holds the handle 24 and twists it clockwise. Therefore, the handle 24 drives the rotating rod 23 to rotate clockwise. At this time, the rotation of the rotating rod 23 drives the rotating handle 22 to rotate clockwise around the connection between the rotating handle 22 and the fixing plate 20. Therefore, the rotating handle 22 pulls the two connecting posts 25, causing the two sliding rods 26 to move towards... The two sliding rods 26 slide closer to the center of the rotating rod 23 on the fixed plate 20, causing the two sliding rods 26 to continuously approach each other. The two sliding rods 26 drive the connecting rod 27 to also continuously approach and slide on the sliding port 21. When the connecting rod 27 drives the rubber pad 28 on it to contact the side wall of the heat sink 2, the operator screws the threaded rod 30 into one of the threaded holes 29, so that the threaded rod 30 contacts the handle 24, so that the handle 24 no longer reverses. This allows the two rubber pads 28 to contact the heat sink 2, improving the stability of the heat sink 2.

[0058] The quick-installation components and protective housing 1 enable installers to quickly install the heat sink 2 in the appropriate position, ensuring the correct relative position between the heat sink 2 and other components. This allows for quick and easy fixation of the heat sink 2 inside the protective housing 1, making the installation of the heat sink 2 more convenient and accurate. At the same time, the protective housing 1 effectively prevents rainwater, dust, mud, and other contaminants from entering the heat sink 2. Furthermore, during the operation of new energy vehicles, if the heat sink 2 is subjected to minor scratches or impacts, the protective housing 1 can absorb and disperse the impact force, reducing damage to the heat sink 2.

[0059] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0060] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heat dissipation box for a new energy vehicle, comprising a protective outer shell (1), characterized in that: The inner cavity of the protective shell (1) is provided with a heat dissipation box (2). The side wall of the protective shell (1) is provided with a round hole (3). The two sides of the protective shell (1) are symmetrically provided with heat dissipation vents (4). There are no less than two heat dissipation vents (4). The side wall of the protective shell (1) is provided with an opening and closing assembly. The opening and closing assembly includes an electric telescopic rod (5) fixedly connected to the top of the protective shell (1). The telescopic shaft end of the electric telescopic rod (5) is fixedly connected to a fixing rod (6). The side of the fixing rod (6) near the protective shell (1) is rotatably connected to a connecting rod. One (7), the end of the connecting rod one (7) away from the fixed rod (6) is rotatably connected to the connecting rod two (8), the protective shell (1) is fixedly connected to the side of the electric telescopic rod (5) with the fixed frame (9), the side wall of the protective shell (1) is fixedly connected to the fixed frame (9), the fixed frame (9) is rotatably connected to the side of the fixed frame (9) near the protective shell (1), the outer side of the multiple rotating columns (11) is fixedly connected to the rotating rod one (10), and the end of the multiple rotating columns (11) away from the fixed frame (9) is fixedly connected to the opening and closing plate (12). The protective shell (1) is provided with a scraping assembly on its side wall. The scraping assembly includes a rotating rod two (13) rotatably connected to the bottom of the fixed rod (6). A rotating disk (14) is rotatably connected to the bottom of the rotating rod two (13). A sleeve (15) is fixedly connected to the outside of one of the heat dissipation vents (4). The scraping assembly also includes five strip holes (16) annularly opened on the rotating disk (14), each strip hole (16) is slidably connected to a rotating rod three (17), each rotating rod three (17) is fixedly connected to an arc-shaped rubber block (18) at one end away from the strip hole (16), and the sleeve (15) is fixedly connected to five fixed cylinders (19) on the side close to the arc-shaped rubber block (18). The outer side of the sleeve (15) is rotatably engaged with the rotating disk (14), and the outer side of the fixed cylinder (19) is rotatably connected to the arc-shaped rubber block (18).

2. The heat dissipation box for a new energy vehicle according to claim 1, characterized in that: The protective shell (1) is provided with a quick-installation assembly. The quick-installation assembly includes a fixing plate (20) fixedly connected to the bottom of the inner cavity of the protective shell (1). The fixing plate (20) is symmetrically provided with sliding openings (21). The bottom of the fixing plate (20) is rotatably connected with a rotating handle (22). The bottom of the rotating handle (22) is fixedly connected with a rotating rod (23). The bottom of the rotating rod (23) is fixedly connected with a handle (24). The bottom of the rotating handle (22) is symmetrically rotatably connected with a connecting post (25).

3. A heat dissipation box for new energy vehicles according to claim 2, characterized in that: The quick-installation assembly also includes sliding rods (26) symmetrically slidably connected to the bottom of the fixed plate (20). Each sliding rod (26) has two connecting rods (27) symmetrically fixedly connected to its top. A rubber pad (28) is fixedly connected between each pair of connecting rods (27). The bottom of the protective shell (1) has multiple threaded holes (29), and the threaded holes (29) are threaded with threaded rods (30).

4. A heat dissipation box for new energy vehicles according to claim 1, characterized in that: The end of the rotating rod (10) away from the rotating column (11) is rotatably connected to the connecting rod (8), and the outer side of the rotating column (11) is rotatably connected to the protective shell (1).

5. A heat dissipation box for a new energy vehicle according to claim 1, characterized in that: The multiple rotating columns (11) are arranged in a linear array with the fixing frame (9) close to one side of the protective shell (1), and the dimensions of the two adjacent opening and closing plates (12) are adapted to each other.

6. A heat dissipation box for a new energy vehicle according to claim 2, characterized in that: The outer side of the rotating rod four (23) is rotatably connected to the bottom of the protective shell (1).

7. A heat dissipation box for a new energy vehicle according to claim 3, characterized in that: Each of the connecting posts (25) is rotatably connected to the sliding rod (26) at one end away from the rotating handle (22), the connecting rod (27) is slidably adapted to the inside of the sliding port (21), and the top of the fixing plate (20) abuts against the heat sink (2).

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