A protection assembly for cooling and heat insulation of a rain strip driving device in a cabin and a car thereof
By installing a combination structure of front cover trim, HVAC pressure plate and heat insulation shell in the engine compartment of the wiper drive unit, cold air from the outside is introduced to reduce the temperature, which solves the problem of high temperature in the engine compartment affecting the wiper drive unit and achieves stable operation and safety assurance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHONGQING CHANGAN AUTOMOBILE CO LTD
- Filing Date
- 2024-03-14
- Publication Date
- 2026-07-21
AI Technical Summary
In the existing technology, when the wiper drive unit is installed in the engine compartment, it cannot effectively cope with the high temperature environment, which may cause the motor to slow down, stop working, or the gears to shatter, posing a safety risk.
Design a protective assembly including a front hood trim, a heating and ventilation pressure plate, and a heat insulation shell. The heat insulation shell introduces cooler outside air through an external connection, a first air inlet, and a second air inlet, thus isolating the hot air inside the cabin, forming a sealed space, and reducing the ambient temperature of the wiper drive unit.
It effectively isolates the high-temperature air inside the cabin, maintains the normal operation of the wiper drive, avoids damage and safety risks, and ensures stable operation in high-temperature environments.
Smart Images
Figure CN117944627B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of automotive wiper drive protection technology, specifically to a protective component for cooling and heat insulation of the wiper drive in the engine compartment and the automotive thereof. Background Technology
[0002] For most modern cars, the windshield wiper drive unit is typically installed separately from the engine compartment, located below the wiper cover. This unit includes the wiper motor and transmission components. However, a small number of cars, due to layout requirements, have their wiper drive units installed inside the engine compartment. In hot, rainy weather, if the vehicle is under harsh driving conditions such as low-speed hill climbing or idling, heat recirculation in the engine compartment can cause the air temperature in the upper part of the compartment to be 40-60°C higher than the ambient temperature. Since the wiper drive unit generally uses standard components, the materials used for both the motor and the gears in the drive assembly cannot withstand the high temperatures inside the engine compartment. Continued operation at these high temperatures will cause the motor to gradually slow down or even stop working, posing a significant safety risk. Furthermore, the gears operating at high temperatures are at risk of chipping, damaging the wipers and posing serious failure and safety risks.
[0003] Existing technologies related to windshield wiper drives are all based on the scenario where the windshield wiper drive is installed separately from the engine compartment, and there is very little mention of how to make the windshield wiper drive work in the high-temperature environment of the engine compartment. Summary of the Invention
[0004] One objective of this invention is to provide a protective component for cooling and heat insulation of the windshield wiper drive unit in the engine compartment, so as to solve the problem in the prior art that the windshield wiper drive unit installed in the engine compartment has to withstand high temperatures; another objective is to provide a vehicle.
[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:
[0006] A protective assembly for cooling and insulating a windshield wiper drive unit inside an engine compartment includes a front cover trim piece with an external connection port, a heating, ventilation, and air conditioning (HVAC) pressure plate for dividing the engine compartment, and a heat insulation shell mounted on the bottom surface of the HVAC pressure plate. The heat insulation shell is used to enclose the windshield wiper drive unit. The front cover trim piece is mounted on the HVAC pressure plate. The HVAC pressure plate has a first air inlet communicating with the external connection port, and the heat insulation shell has a second air inlet communicating with the first air inlet and a through hole for the windshield wiper actuator to pass through. Outside air enters through the external connection port, passes through the first air inlet and the second air inlet, and then enters the heat insulation shell.
[0007] Based on the aforementioned technical means, the heat insulation shell forms a sealed space relative to the engine compartment. After the wiper drive unit is installed inside the heat insulation shell, it isolates the wiper drive unit from the high-temperature air inside the engine compartment, preventing direct contact between the high-temperature air and the wiper drive unit. Simultaneously, cooler outside air enters through the external connection of the front hood trim and the HVAC pressure plate. Due to airflow, a pressure difference exists between the outside air and the air inside the heat insulation shell. This causes the cooler outside air to flow into the heat insulation shell through the first and second air inlets, injecting cooler air into the shell and maintaining a lower ambient temperature inside. This prevents the environment inside the heat insulation shell from being heated by prolonged exposure to the engine compartment. Furthermore, the cooler air entering the heat insulation shell allows outside air to circulate within the shell, further cooling the environment around the wiper drive unit. Alternatively, a channel can be provided to exhaust the outside air. The passageway is sealed to the actuator, preventing hot air from the cabin from entering the insulation shell.
[0008] Furthermore, the HVAC pressure plate is provided with a first air inlet channel at the first air inlet, and the first air inlet channel extends along the axial direction of the first air inlet.
[0009] According to the above technical means, since the air temperature inside the heat insulation shell is higher, the cooler outside air will flow towards the first air inlet under the action of pressure difference. The function of the first air inlet channel is to reduce the flow area of the air flowing into the first air inlet. When the amount of outside air entering remains unchanged, that is, the air volume remains unchanged, the air diameter becomes smaller, thus the air speed increases, which in turn allows the outside air to enter the second air inlet more quickly.
[0010] Furthermore, the heat insulation shell is provided with a second air inlet channel at the second air inlet, and the second air inlet channel extends along the axial direction of the second air inlet; the second air inlet channel extends into the second air inlet channel.
[0011] Based on the aforementioned technical means, the function of the second air inlet channel is the same as that of the first air inlet channel. However, the fact that the second air inlet channel extends into the first air inlet channel indicates that the inner diameter of the second air inlet channel is further reduced, which means that the air path can be further narrowed, allowing outside air to enter the insulation shell more quickly and lower the ambient temperature inside the insulation shell.
[0012] Furthermore, the inner diameter of the first air inlet channel and / or the second air inlet channel gradually increases along the air inlet direction; the air inlet direction is the direction in which airflow enters the heat insulation shell along the first air inlet channel and the second air inlet channel.
[0013] Based on the aforementioned technical means, the inner diameters of the first and second air intake channels gradually increase, resulting in a larger airflow coverage area when outside air enters the heat insulation shell. This helps to reduce the ambient temperature around the wiper drive device and ensure the uniformity of the ambient temperature around the wiper drive device.
[0014] Furthermore, a gap is formed between the second air inlet channel and the first air inlet channel, or the outer surface of the second air inlet channel is in contact with the inner surface of the first air inlet channel.
[0015] According to the aforementioned technical means, a gap is formed between the second air inlet channel and the first air inlet channel, resulting in a large difference in the inner diameter between the two channels and a good effect on increasing air velocity. However, the outer surface of the second air inlet channel is fitted to the inner surface of the first air inlet channel, and the inner diameters of the two channels are relatively close, resulting in a poorer effect on increasing air velocity. However, the fitted surfaces are less prone to air leakage, and the utilization rate of outside air is high.
[0016] Furthermore, a sealing element is provided between the first air inlet channel and the second air inlet channel.
[0017] Based on the above-mentioned technical means, the sealing element makes the first air inlet channel and the second air inlet channel fit together and seal, further preventing air leakage.
[0018] Furthermore, the external connection port and the first air inlet are not in the same vertical direction.
[0019] According to the above technical means, the external connection port and the first air inlet are not in the same vertical direction. The external connection port and the first air inlet can be arranged side by side, or the axis of the external connection port and the axis of the first air inlet can form an angle greater than 0 degrees and less than 180 degrees. The specific arrangement can be set according to the actual vehicle model. This layout can prevent rainwater from flowing directly into the first air inlet after entering the external connection port, thus avoiding rainwater from entering the heat insulation shell.
[0020] Furthermore, the heat insulation shell includes an air guide hood and a heat insulation hood; the air guide hood includes a top plate and air guide side enclosures disposed around the top plate, and the first air inlet is located on the top plate; the heat insulation hood includes a bottom plate and heat insulation side enclosures disposed around the bottom plate, the heat insulation side enclosures are connected to the air guide side enclosures and the heat insulation side enclosures abut against the inner surface of the air guide side enclosures; the air guide side enclosures and the heat insulation side enclosures are respectively provided with notches for forming the through hole.
[0021] Based on the aforementioned technical means, the wiper drive unit is mounted on the base plate of the heat shield. The heat shield has a larger contact area with the wiper drive unit compared to the air guide shield. By placing the heat-insulating side of the heat shield inside the air guide side, the contact area between the heat shield and the high-temperature gases in the engine compartment is reduced, decreasing heat transfer from the high-temperature gases to the heat shield. Less heat received by the heat shield means less heat can be transferred to the wiper drive unit. Simultaneously, the double-layer structure formed by the air guide side and the heat-insulating side provides double-layer insulation, further reducing the transfer of heat from the high-temperature gases into the environment inside the heat shield.
[0022] Furthermore, the base plate is equipped with a motor mounting bracket for fixing the wiper drive device and a downpipe; the outlet end of the downpipe is connected to the water outlet channel of the engine compartment.
[0023] Based on the aforementioned technical means, the motor mounting bracket can reduce the contact area between the wiper drive unit and the heat shield, thereby reducing the heat transferred from the heat shield to the wiper drive unit. If a small amount of water enters the heat shield, the drain pipe can also drain this portion of water, preventing rainwater from accumulating inside the heat shield.
[0024] A vehicle is also provided, comprising a body forming a cabin, a hood covering the cabin, and a wiper drive unit located within the cabin. The wiper drive unit includes a wiper motor and a transmission assembly connected to the output end of the wiper motor, and also includes the aforementioned protective assembly. A heating, ventilation, and air conditioning (HVAC) pressure plate is installed within the cabin and located below the hood. The opening of a first air inlet faces the hood. The HVAC pressure plate separates the cabin and the hood. The wiper drive unit is installed within the heat insulation shell.
[0025] Based on the aforementioned technical means, the HVAC pressure plate separates the engine compartment, creating an airflow channel isolated from the engine compartment between the HVAC pressure plate, the engine compartment cover, and the front hood assembly. Outside air enters this airflow channel through the external connection, travels along the channel to the first air inlet, and finally reaches the insulation shell, thus cooling the environment inside the insulation shell. Since the transmission components also have insufficient high-temperature resistance, and the gears used in the transmission are at risk of gear chipping, placing the wiper motor and transmission components together inside the insulation shell provides simultaneous protection for both the wiper motor and the transmission components.
[0026] The beneficial effects of this invention are as follows: The heat insulation shell isolates the wiper drive unit located in the engine compartment from the high-temperature air inside the engine compartment. The HVAC pressure plate separates the high-temperature air inside the engine compartment from the lower-temperature air outside, allowing the lower-temperature air outside to enter the heat insulation shell through the external connection port of the front hood trim, the first air inlet, and the second air inlet, thereby lowering the ambient temperature inside the heat insulation shell. By insulating the windshield with the heat insulation shell and introducing the lower-temperature air outside into the heat insulation shell, the ambient temperature of the wiper drive unit is kept low. Even though the wiper drive unit is installed inside the engine compartment, it will not be affected or damaged by the high-temperature air inside the engine compartment. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of a protective component for cooling and heat insulation of a windshield wiper drive device in the cabin, according to the present invention.
[0028] Figure 2 This is a cross-sectional structural diagram of a protective component structure for cooling and heat insulation of a windshield wiper drive device in the cabin, according to the present invention.
[0029] Figure 3 This is a schematic diagram of the structure of a protective component for cooling and heat insulation of the windshield wiper drive device in the cabin, according to the present invention, which removes the HVAC pressure plate.
[0030] Figure 4 This is a schematic diagram of the structure of the heat insulation shell and the first air inlet channel of the present invention;
[0031] Figure 5 This is a schematic diagram of the structure of the first air inlet channel and the cover plate of the present invention;
[0032] Figure 6 This is a schematic diagram of the structure of the air guide cover of the present invention;
[0033] Figure 7 This is a schematic diagram of the structure of the heat insulation cover of the present invention;
[0034] Figure 8 This is a schematic cross-sectional view of a protective assembly for cooling and heat insulation of a windshield wiper drive device in the cabin, according to the present invention.
[0035] Figure 9 This is a schematic diagram showing the installation state of the wiper drive device of the present invention.
[0036] Among them, 1-front cover decorative part; 101-external connection port; 2-HVAC pressure plate; 201-first air inlet; 202-first air inlet channel; 203-cover plate; 3-heat insulation shell; 301-second air inlet; 302-second air inlet channel; 303-air guide cover; 3031-top plate; 3032-air guide side enclosure; 304-heat insulation cover; 3041-bottom plate; 3411-motor mounting bracket; 3412-drain pipe; 3413-mounting hole; 3014-drain hole; 3042-heat insulation side enclosure; 305-notch; 4-wiper drive device; 5-transmission assembly. Detailed Implementation
[0037] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.
[0038] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.
[0039] This embodiment proposes a protective component for cooling and heat insulation of the windshield wiper drive device in the cabin, such as... Figure 1-3 As shown, the device includes a front cover trim piece 1 with an external connection port 101, a heating, ventilation and air conditioning (HVAC) pressure plate 2 for separating the engine compartment, and a heat insulation shell 3 installed on the bottom surface of the HVAC pressure plate 2. The heat insulation shell 3 is used to enclose the wiper drive unit. The front cover trim piece 1 is installed on the HVAC pressure plate 2. The HVAC pressure plate 2 is provided with a first air inlet 201 that communicates with the external connection port 101. The heat insulation shell 3 is provided with a second air inlet 301 that communicates with the first air inlet 201 and a through hole for the wiper actuator to pass through. Outside air enters through the external connection port 101, passes through the first air inlet 201 and the second air inlet 301, and then enters the heat insulation shell 3.
[0040] The heat insulation shell 3 forms a sealed space within the engine compartment relative to the engine compartment. After the wiper drive unit is installed in the heat insulation shell 3, it isolates the wiper drive unit from the high-temperature air inside the engine compartment, preventing direct contact between the high-temperature air and the wiper drive unit. Simultaneously, cooler outside air enters through the external connection 101 of the front hood trim 1 between the front hood trim 1 and the HVAC pressure plate 2. Due to the airflow, a pressure difference exists between the outside air and the air inside the heat insulation shell. This causes the cooler outside air to flow through the first air inlet 201 and the second air inlet 301 into the heat insulation shell 3, injecting cooler air into it and maintaining a lower ambient temperature inside the heat insulation shell 3. This prevents the environment inside the heat insulation shell 3 from being heated by prolonged exposure to the engine compartment. Furthermore, the lower temperature and higher pressure of the air entering the heat insulation shell 3 allow outside air to circulate within the heat insulation shell 3, further cooling the environment around the wiper drive unit. If the gas content inside the heat insulation shell 3 reaches a point where it is about to overflow, it will be discharged through an exhaust pipe located at the bottom of the heat insulation shell 3, which connects to the engine room drainage channel. This exhaust channel can also be used to discharge rainwater from inside the heat insulation shell 3. The gas is sealed to the actuator through a perforation, preventing hot air from the engine room from entering the heat insulation shell 3 through the perforation.
[0041] The heat insulation shell 3 isolates the wiper drive unit located inside the engine compartment from the high-temperature air inside the engine compartment. The HVAC pressure plate 2 separates the high-temperature air inside the engine compartment from the lower-temperature air outside, allowing the lower-temperature air outside to enter the heat insulation shell 3 through the external connection 101, the first air inlet 201, and the second air inlet 301 of the front hood trim piece 1, thus lowering the ambient temperature inside the heat insulation shell 3. By insulating the wiper drive unit with heat and introducing the lower-temperature air outside into the heat insulation shell 3, the ambient temperature inside the wiper drive unit remains low. Even though the wiper drive unit is installed inside the engine compartment, it will not be affected or damaged by the high-temperature air inside the engine compartment, thus preventing safety issues caused by wiper malfunction during use.
[0042] In this embodiment, as Figure 4 and Figure 6As shown, the HVAC pressure plate 2 has a first air inlet channel 202 at the first air inlet 201, extending along the axial direction of the first air inlet 201. The insulation shell 3 has a second air inlet channel 302 at the second air inlet 301, extending along the axial direction of the second air inlet 301; the second air inlet channel 302 extends into the insulation shell 301. Because the air temperature inside the insulation shell 3 is higher, the cooler outside air will flow towards the first air inlet 201 under the action of pressure difference. The function of the first air inlet channel 202 is to reduce the flow area of the air flowing into the first air inlet 201. When the amount of outside air entering remains constant, that is, the air volume remains constant, the air diameter becomes smaller, thus the air velocity increases, allowing outside air to enter the second air inlet 301 more quickly. Similarly, the second air inlet channel 302 also allows outside air to enter the insulation shell 3 more quickly. Meanwhile, the second air inlet channel 302 extends into the first air inlet channel 202, indicating that the inner diameter of the second air inlet channel 302 is further reduced. This means that the airflow path can be further narrowed, allowing outside air to enter the insulation shell 3 more quickly and lower the ambient temperature inside the insulation shell 3. Both the first air inlet channel 202 and the second air inlet channel 302 can be enclosed by cylindrical or polygonal cylindrical components.
[0043] The first air inlet duct 202 can be integrally formed with the HVAC pressure plate 2 or it can be installed separately by welding. In this embodiment, as shown... Figure 4 and 5 As shown, a cover plate 203 is provided at the first air inlet 201, and a first air inlet channel 202 is disposed on the cover plate 203. The cover plate 203 is connected and fixed to the HVAC pressure plate 2. The second air inlet channel 302 can be integrally formed with the heat insulation shell 3 or can be separately welded and installed. In some embodiments, the second air inlet channel 302 is integrally formed with the heat insulation shell 3 in this embodiment.
[0044] Furthermore, the inner diameter of the first air intake channel 202 and / or the second air intake channel 302 gradually increases along the air intake direction; the air intake direction is the direction in which airflow enters the heat insulation shell 3 along the first air intake channel 202 and the second air intake channel 302. The gradual increase in the inner diameter of the first air intake channel 202 and the second air intake channel 302 results in a larger airflow coverage area when outside air enters the heat insulation shell 3, which is beneficial for reducing the ambient temperature around the wiper drive device and ensuring the uniformity of the ambient temperature around the wiper drive device.
[0045] In some embodiments, a gap is formed between the second air inlet channel 302 and the first air inlet channel 202 to allow air to enter the insulation shell 3 at a faster speed. The difference in inner diameter between the second air inlet channel 302 and the first air inlet channel 202 is relatively large. Since the gap can cause air leakage and affect the utilization rate of outside air, a seal is provided between the first air inlet channel 202 and the second air inlet channel 302. The seal can be a sealing ring or a component formed by applying sealant to prevent air from flowing out through the gap. In other embodiments, the outer surface of the second air inlet channel 302 is fitted to the inner surface of the first air inlet channel 202. After the two are fitted together, the problem of air leakage can be avoided or reduced. However, the inner diameters of the second air inlet channel 302 and the first air inlet channel 202 are relatively close, and the effect of increasing the air velocity is poor. To further increase the sealing between the second air inlet channel 302 and the first air inlet channel 202, a seal can also be provided between them.
[0046] To prevent rainwater from entering the external connection 101 and then flowing directly into the first air inlet 201, thus avoiding rainwater entering the heat insulation shell 3, the external connection 101 and the first air inlet 201 are not in the same vertical direction. "Not in the same vertical direction" means that the external connection 101 and the first air inlet 201 can be arranged side-by-side, or the axis of the external connection 101 and the axis of the first air inlet 201 form an angle greater than 0 degrees and less than 180 degrees. In this embodiment, the external connection 101 and the first air inlet 201 are arranged side-by-side. In some embodiments, the external connection 101 has multiple grille holes, and the air intake area of the grille holes is larger than the area of the first air inlet 201. Compared to a through hole with a large diameter and no grille holes, the air intake distribution of the grille holes is more uniform, and the strength at the grille holes is also higher. At the same time, the grille holes can also block some large particles, preventing large particles from entering the vehicle and causing driving hazards.
[0047] In this embodiment, as Figure 3 , 6As shown in Figure 7, the heat insulation shell 3 includes an air guide hood 303 and a heat insulation shell 304; the air guide hood 303 includes a top plate 3031 and an air guide side enclosure 3032 disposed around the top plate 3031, and the first air inlet 201 is located on the top plate 3031; the heat insulation shell 304 includes a bottom plate 3041 and an heat insulation side enclosure 3042 disposed around the bottom plate 3041, the heat insulation side enclosure 3042 is connected to the air guide side enclosure 3032 and the heat insulation side enclosure 3042 abuts against the inner surface of the air guide side enclosure 3032; the air guide side enclosure 3032 and the heat insulation side enclosure 3042 are respectively provided with a notch 305 for forming a passage hole. The wiper drive unit is mounted on the base plate 3041 of the heat shield 304. The heat shield 304 has a larger contact area with the wiper drive unit compared to the air guide 303. By placing the heat-insulating side enclosure 3042 of the heat shield 304 inside the air guide side enclosure 3032, the contact area between the heat shield 304 and the high-temperature gases in the engine compartment is reduced, thus decreasing heat transfer from the high-temperature gases to the heat shield 304. With less heat received by the heat shield 304, the amount of heat that can be transferred to the wiper drive unit is also reduced. Simultaneously, the double-layer structure formed by the air guide side enclosure 3032 and the heat-insulating side enclosure 3042 provides a double-layer insulation effect, further reducing the transfer of heat from the high-temperature gases into the environment inside the heat shield 3. Specifically, the base plate 3041 is equipped with a motor mounting bracket 3411 for fixing the wiper motor in the wiper drive unit and a drain pipe 3412. The motor mounting bracket 3411 has multiple mounting holes 3413 for connecting to the wiper motor, and the base plate has drain holes 3414 that connect to the drain pipe 3412. In this embodiment, there are four mounting holes 3413 distributed at the four corners; the outlet end of the drain pipe 3412 connects to the water outlet channel in the engine compartment. The motor mounting bracket 3411 reduces the contact area between the wiper motor and the heat shield 304, reducing the heat transferred from the heat shield 304 to the wiper drive unit. If a small amount of water enters the heat shield 3, the drain pipe 3412 can also drain this water, preventing rainwater from accumulating inside the heat shield 3. Furthermore, when a certain amount of outside air enters the heat shield 3, the drain pipe 3412 can also serve as a channel for the outside air to escape.
[0048] This embodiment also proposes a vehicle, including a body forming an engine compartment, a hood covering the engine compartment, and a wiper drive unit located within the engine compartment. The wiper drive unit includes a wiper motor 4 and a transmission assembly 5 connected to the output end of the wiper motor 4, and also includes the aforementioned protective assembly. A heating, ventilation, and air conditioning (HVAC) pressure plate 2 is installed within the engine compartment and located below the hood, with the opening of the first air inlet 201 facing the hood. The HVAC pressure plate 2 separates the engine compartment from the hood; as... Figure 8 and 9 As shown, the wiper drive unit is installed inside the heat insulation housing 3.
[0049] The HVAC pressure plate 2 separates the engine compartment, creating an airflow channel between the HVAC pressure plate 2, the engine compartment cover, and the front hood assembly. Outside air enters this airflow channel through the outside connection 101, travels along the airflow channel to the first air inlet 201, and finally reaches the heat insulation shell 3, thus cooling the ambient temperature inside the heat insulation shell 3. Since the transmission assembly 5 also has insufficient high-temperature resistance, and the gears used in its transmission are at risk of gear chipping, placing the wiper motor 4 and the transmission assembly 5 together inside the heat insulation shell 3 provides simultaneous protection for both.
[0050] The above embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention.
Claims
1. A protective assembly for cooling and heat insulation of a windshield wiper drive unit inside an aircraft cabin, comprising a front cover trim piece (1) with an external communication port (101), characterized in that, It also includes a heating, ventilation and air conditioning pressure plate (2) for separating the cabin and a heat insulation shell (3) installed on the bottom surface of the heating, ventilation and air conditioning pressure plate (2), the heat insulation shell (3) for enclosing the wiper drive device; the front cover trim piece (1) is installed on the heating, ventilation and air conditioning pressure plate (2); the heating, ventilation and air conditioning pressure plate (2) is provided with a first air inlet (201) communicating with the external communication port (101), the heat insulation shell (3) is provided with a second air inlet (301) communicating with the first air inlet (201) and a through hole for the wiper actuator to pass through; outside air enters through the external communication port (101), passes through the first air inlet (201) and the second air inlet (301) and then enters the heat insulation shell (3).
2. The protective assembly for cooling and heat insulation of the windshield wiper drive device in the cabin according to claim 1, characterized in that: The HVAC pressure plate (2) has a first air inlet channel (202) at the first air inlet (201), and the first air inlet channel (202) extends along the axial direction of the first air inlet (201).
3. The protective assembly for cooling and heat insulation of the windshield wiper drive device in the cabin according to claim 2, characterized in that: The heat insulation shell (3) has a second air inlet channel (302) at the second air inlet (301), and the second air inlet channel (302) extends along the axial direction of the second air inlet (301); the second air inlet channel (302) extends into the second air inlet channel (302).
4. The protective assembly for cooling and heat insulation of the windshield wiper drive device in the cabin according to claim 3, characterized in that, The inner diameter of the first air inlet channel (202) and / or the second air inlet channel (302) gradually increases along the air inlet direction; the air inlet direction is the direction in which the airflow enters the heat insulation shell (3) along the first air inlet channel (202) and the second air inlet channel (302).
5. The protective assembly for cooling and heat insulation of the windshield wiper drive device in the cabin according to claim 3, characterized in that: A gap is formed between the second air inlet channel (302) and the first air inlet channel (202), or the outer surface of the second air inlet channel (302) is in contact with the inner surface of the first air inlet channel (202).
6. The protective assembly for cooling and heat insulation of the windshield wiper drive device in the cabin according to claim 5, characterized in that: A sealing element is provided between the first air inlet channel (202) and the second air inlet channel (302).
7. The protective assembly for cooling and heat insulation of the windshield wiper drive device in the cabin according to claim 1, characterized in that: The external connection port (101) and the first air inlet (201) are not in the same vertical direction.
8. The protective assembly for cooling and heat insulation of the windshield wiper drive device in the cabin according to any one of claims 1-7, characterized in that: The heat insulation shell (3) includes an air guide hood (303) and a heat insulation hood (304); the air guide hood (303) includes a top plate (3031) and an air guide side enclosure (3032) disposed around the top plate (3031), and the first air inlet (201) is located on the top plate (3031); the heat insulation hood (304) includes a bottom plate (3041) and an heat insulation side enclosure (3042) disposed around the bottom plate (3041), the heat insulation side enclosure (3042) is connected to the air guide side enclosure (3032) and the heat insulation side enclosure (3042) abuts against the inner surface of the air guide side enclosure (3032); the air guide side enclosure (3032) and the heat insulation side enclosure (3042) are respectively provided with a notch (305) for forming the through hole.
9. The protective assembly for cooling and heat insulation of the windshield wiper drive device in the cabin according to claim 8, characterized in that: The base plate (3041) is equipped with a motor mounting bracket (3411) for fixing the wiper drive device and a downpipe (3412); the outlet end of the downpipe (3412) is connected to the water outlet channel of the engine compartment.
10. An automobile comprising a body forming a cabin, a hood covering the cabin, and a wiper drive unit located within the cabin, the wiper drive unit comprising a wiper motor (4) and a transmission assembly (5) connected to the output end of the wiper motor (4), characterized in that: It also includes the protective components according to any one of claims 1-9, wherein the HVAC pressure plate (2) is installed in the cabin and located below the cabin cover, and the opening of the first air inlet (201) faces the cabin cover; the HVAC pressure plate (2) separates the cabin and the cabin cover; and the wiper drive device is installed in the heat insulation shell (3).