HVAC assembly of automobile air conditioner

Abstract

An automobile air conditioner HVAC assembly comprises a shell, an air inlet box assembly, an air outlet box assembly and an air channel enabling the air inlet box assembly to be communicated with the air outlet box assembly are arranged on the shell, an inner circulation air inlet and an outer circulation air inlet are fixed to the air inlet box assembly, and an arc-shaped rail is arranged on the air inlet box assembly. A drawing-pulling integrated filter screen is arranged in the space in the arc-shaped track and covers the area of the inner circulation air inlet and the area of the outer circulation air inlet, and a track inlet of the arc-shaped track is exposed to the outside of the automobile air conditioner HVAC assembly. Compared with the prior art, the air purifier has the technical effects that the air purifier is provided with the push-pull integrated filter screen, can be arranged at the foot position of a co-driver in a cab, can filter external circulation air and internal circulation air, and is convenient to replace the filter screen at the same time.

Description

Technical Field

[0001] This utility model belongs to the field of automotive air conditioning technology, specifically relating to an automotive air conditioning HVAC assembly. Background Technology

[0002] With the depletion of oil resources and environmental pressures such as global warming, the electrification of automobiles is continuously deepening, and the scope of electrification is gradually expanding from passenger cars to commercial vehicles. In order to save development costs, many electric trucks are converted from existing gasoline vehicles to achieve electrification.

[0003] The automotive air conditioning (HVAC) assembly is basically converted from the original vehicle to achieve electrification and match the electric vehicle.

[0004] With the electrification of automobiles, power sources have gradually been replaced by batteries, and air conditioning heating components have gradually been replaced by PTC (Power Transmission Control) systems with air-cooled heating. However, with the rise of heat pump air conditioning in recent years, cabin heating is gradually being replaced by indoor condensers that utilize refrigerants.

[0005] Current automotive air conditioning technology solutions: For crude trucks, air conditioning systems primarily focus on filtering the external airflow, rarely considering filtering the internal airflow. Therefore, the HVAC intake assembly only has one filter at the external airflow inlet, while the internal airflow inlet lacks a filter. However, the difficulty in removing the truck's front grille makes cleaning the external airflow inlet filter inconvenient.

[0006] If there is only an external circulation filter, it can only filter the dust in the external circulation air intake, but cannot filter the dust in the internal circulation air intake. The truck operating environment is relatively harsh and dusty. Relying on only an external circulation filter often causes dust to enter the HVAC distribution box from the internal circulation air intake, resulting in blockage of the evaporator core surface, which reduces the cooling effect of the air conditioner. In severe cases, it can cause corrosion of the evaporator core, refrigerant leakage, and failure of the air conditioner cooling function.

[0007] At the same time, we also noticed that if the installation position of the external circulation filter is moved downstream (for example, the filter is installed on the air duct), so that it can also filter the internal circulation air, it will create obstacles to replacing the filter.

[0008] Therefore, there is an urgent need to develop an automotive air conditioning HVAC assembly that can filter both external and internal air circulation, while also facilitating filter replacement. Utility Model Content

[0009] The technical problem this invention aims to solve is: how to design an automotive air conditioning (HVAC) assembly that can filter both external and internal air circulation, while also facilitating filter replacement.

[0010] The specific technical solution of this utility model is as follows:

[0011] An automotive air conditioning (HVAC) assembly includes a housing, on which an air inlet assembly, an air outlet assembly, and an air duct connecting the air inlet assembly and the air outlet assembly are provided. An internal circulation air inlet and an external circulation air inlet are fixed on the air inlet assembly. An arc-shaped track is provided on the air inlet assembly. A pull-out integrated filter is provided in the space inside the arc-shaped track. The filter covers the areas of the internal circulation air inlet and the external circulation air inlet. The track entrance of the arc-shaped track is exposed to the outside of the automotive air conditioning (HVAC) assembly.

[0012] The filter screen frame is an elastic element; the track inlet is located at the foot of the co-driver in the cab, and the "track of the pull-out direction" of the filter screen matches the "contour of the floor at the foot of the co-driver in the cab" to facilitate filter screen replacement; an inner positioning part and an outer positioning part are fixed on the filter screen, the inner positioning part can prevent the "filter screen from moving inward within the track space", and the outer positioning part can prevent the "filter screen from moving outward within the track space".

[0013] The inner positioning component is an outer baffle. The end face of the insertion port of the arc-shaped track cooperates with the outer baffle to prevent the filter screen from moving inward within the space of the track. The inner positioning component is an elastic protrusion. The side panel of the arc-shaped track cooperates with the elastic protrusion. The elastic protrusion is triangular. There are two sets of elastic protrusions, distributed on both sides of the filter screen.

[0014] The insertion port is a flared opening, and a conical body that mates with the flared opening is fixed to the inner side of the outer baffle; an elastic plate is fixed on the filter screen, and the elastic plate extends along the axial direction of the filter screen, with an interference fit between the elastic plate and the space inside the track.

[0015] The air intake box assembly is equipped with a rotating air intake damper. By rotating the air intake damper, the air intake box assembly can be adjusted to connect to the outside world through the internal circulation air intake and / or the external circulation air intake. A compensation air intake is provided on the side of the internal circulation air intake of the air intake box assembly that is away from the external circulation air intake.

[0016] The air outlet assembly has a fixed face air outlet, a foot air outlet, and a defrost air outlet. The air outlet assembly has three air outlet dampers, which are distributed to correspond to the face air outlet, foot air outlet, and defrost air outlet. The edge of the air outlet damper is fixed with damper sealing rubber.

[0017] The edge of the damper sealing rubber is serrated, consisting of multiple serrated rubber units, and the space between two adjacent serrated rubber units is a serrated gap.

[0018] Compared with the prior art, the technical advantage of this utility model is that it has a pull-out integrated filter screen, which can be installed at the foot of the passenger seat in the driver's cab. It can filter both external and internal air circulation, and it is also convenient to replace the filter screen. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram (I) of this utility model.

[0020] Figure 2 This is a three-dimensional schematic diagram (II) of the present invention.

[0021] Figure 3 This is a cross-sectional schematic diagram (I) of this utility model.

[0022] Figure 4 yes Figure 3 An enlarged schematic diagram of the sealing rubber in the middle.

[0023] Figure 5 This is a top view of the sealing rubber.

[0024] Figure 6 Cross-sectional schematic diagram (II) of this utility model.

[0025] Figure 7 for Figure 6 The enlarged diagram in the lower right corner of the image.

[0026] Figure 8 This is a schematic diagram of a filter screen.

[0027] Figure 9 This is a schematic diagram of the utility model in use.

[0028] Figure 10 yes Figure 9 The enlarged diagram in the lower right corner of the image. Detailed Implementation

[0029] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0030] like Figure 1-2 An automotive air conditioning (HVAC) assembly includes a housing 10, which is generally made of plastic. The housing 10 is provided with an air inlet assembly 12, an air outlet assembly 13, and an air duct 14 that connects the air inlet assembly 12 and the air outlet assembly 13. A blower assembly 11 is fixed on the housing 10. The function of the blower assembly 11 is to move the air in the air inlet assembly 12 towards the air outlet assembly 13.

[0031] A water pipe 15 is provided on the outer casing 10.

[0032] like Figure 6-8An internal circulation air inlet 41 and an external circulation air inlet 40 are fixed on the air inlet assembly 12. An arc-shaped track 18 is provided on the air inlet assembly 12. A pull-out integrated filter 30 is provided in the space 181 of the arc-shaped track 18. The filter 30 covers the area of ​​the internal circulation air inlet 41 and the external circulation air inlet 40. The track entrance 182 of the arc-shaped track 18 is exposed to the outside of the automotive air conditioning HVAC assembly.

[0033] To facilitate access to the inner space 181 of the track, the frame of the filter 30 is an elastic element.

[0034] like Figure 6-10 To facilitate pulling out, the track inlet 182 is correspondingly set at the foot position 93 of the co-driver's cab. The "track of the pulling direction 98" of the filter 30 matches the "outline of the floor 92 of the foot position 93 of the co-driver's cab" to facilitate filter replacement.

[0035] like Figure 7 In order to prevent the filter screen 30 from moving within the track space 181, an inner positioning member and an outer positioning member are fixed on the filter screen 30. The inner positioning member can prevent the filter screen 30 from moving inward within the track space 181, and the outer positioning member can prevent the filter screen 30 from moving outward within the track space 181.

[0036] like Figure 7 The inner positioning component is the outer baffle 31. The outer baffle 31 cooperates with the end face of the insertion port 182 of the arc-shaped track 18 to prevent the filter screen 30 from moving inward within the inner space 181 of the track. The outer baffle 31 also serves as a handle for easy gripping.

[0037] like Figure 7 The inner positioning element is an elastic protrusion 33. Through the cooperation between the side panel 183 of the arc track 18 and the elastic protrusion 33, the filter screen 30 is prevented from moving outward in the inner space 181 of the track.

[0038] like Figure 7 To facilitate passage through the space 181 within the track, the elastic protrusion 33 is triangular.

[0039] like Figure 7 For stability, the elastic bumps 33 are in two sets, distributed on both sides of the filter screen 30.

[0040] like Figure 7 For easy insertion, the insertion port 182 is a flared opening, and a cone-shaped body 32 that mates with the flared opening is fixed to the inner side of the outer baffle 31.

[0041] like Figure 8To prevent the filter screen 30 from moving within the track space 181, an elastic plate 34 is fixed on the filter screen 30. The elastic plate 34 extends along the axial direction of the filter screen 30 and is interference-fitted with the track space 181. The interference fit allows the filter screen 30 to remain stable within the track space 181.

[0042] like Figure 6 The air inlet assembly 12 is equipped with a rotating air inlet damper 43. By rotating the air inlet damper 43, the air inlet assembly 12 can be connected to the outside through the internal circulation air inlet 41 and / or the external circulation air inlet 40.

[0043] like Figure 6 A compensation air inlet 42 is provided on the side of the internal circulation air inlet 41 of the air inlet box assembly 12 away from the external circulation air inlet 40.

[0044] After the heating is turned on, the temperature inside the car gradually exceeds the outside temperature due to heat accumulation. The temperature of the interior air drawn in through the compensating air intake will also be higher than the outside air drawn in through the external air intake. After the two streams of air mix in the air intake box, the temperature of the mixed air is also slightly higher than the temperature of the pure outside air. Given a fixed heating capacity, an increase in the temperature of the air entering the air conditioning system will correspondingly increase the temperature of the air exiting the system. Therefore, the introduction of a compensating air intake plays a significant role in improving the heating rate and quickly reaching a comfortable interior temperature.

[0045] like Figure 3-5 The air outlet assembly 13 has a fixed face air outlet 21, a foot air outlet 22 and a defrost air outlet 23. The air outlet assembly 13 has three air outlet dampers 24, which are distributed to correspond to the face air outlet 21, the foot air outlet 22 and the defrost air outlet 23.

[0046] like Figure 4 For sealing purposes, the edge of the air outlet damper 24 is fixed with damper sealing rubber 25.

[0047] The damper sealing rubber is generally flexible. Due to the Venturi effect, when the air outlet is closed, the damper sealing rubber is located at the narrowest point of the entire air duct. At this point, the dynamic pressure (velocity head) reaches its maximum value, and the static pressure (resting pressure) reaches its minimum value. This causes the damper sealing rubber 25 to impact the sealing plate 19 of the air outlet assembly 13 (the sealing plate is the component that seals with the damper sealing rubber 25 when the air outlet is closed), generating significant noise and affecting the driver in the cab. Therefore, the following improvement is proposed:

[0048] like Figure 4-5 The edge of the damper sealing rubber 25 is serrated, including multiple serrated rubber units 26, and the space between two adjacent serrated rubber units 26 is a serrated gap 29.

[0049] In this way, when the air outlet is closed, the serrated rubber unit 26 first contacts the sealing plate 19. At this time, the multiple serrated gaps 29 can still allow ventilation, without the Venturi effect, avoiding strong impacts and generating more noise.

[0050] Temperature sensors are installed at the air outlets for blowing air onto the face and feet, which can feed back the air outlet temperature of the HVAC system to the controller, enabling automatic control of the air outlet temperature.

[0051] The working principle of this utility model is as follows:

[0052] like Figure 9-10 The automotive HVAC assembly 99 is installed on the front panel of the cab 90, so that the external air intake 40 is connected to the front grille 91.

[0053] If you need to replace filter 30, pull it out or insert it into the car's HVAC assembly 99 along the pull direction 98.

[0054] Features of this application:

[0055] S1. This utility model's HVAC air inlet assembly features a pull-out integrated filter downstream of the internal and external circulation air inlets, facilitating filtration for both internal and external circulation. The external circulation filter can be upgraded with a non-woven fabric filter element to improve filtration efficiency. This effectively prevents dust from entering the HVAC distribution box from the internal circulation air inlet, thus preventing blockage of the evaporator core surface, which would reduce the air conditioner's cooling effect, and also prevents dust from corroding the evaporator core.

[0056] S2. The filter is a pull-out integrated type. The air inlet assembly is equipped with a horn-shaped insertion port and an arc track for easy insertion. The filter is equipped with a handle for easy insertion and removal.

[0057] S3. When disassembling and cleaning the filter, the filter can be inserted or removed from the space above the floor through the foot area of ​​the passenger in the cab, ensuring the cleanliness of the filter and protecting the evaporator core.

[0058] S4. The air intake assembly has an internal air intake compensation structure, which increases the internal airflow and enhances the cooling effect when the HVAC system is in internal recirculation cooling mode. When the HVAC system is in external recirculation heating mode, it can achieve internal recirculation air intake compensation, enabling the cab to heat up quickly and achieving energy saving and efficiency improvement.

[0059] The S5 HVAC distribution box's heating core space allows for multiple configurations and can be configured with air-heated electric PTC, indoor condensers, or water-heated aluminum cores. It eliminates the need to redevelop the entire HVAC system, enabling the electrification of the air conditioning unit and saving significant design costs. This makes it suitable for platform-based mass promotion.

[0060] S6. The damper sealing rubber is serrated to prevent noise from the rubber whipping against the sealing surface.

[0061] S7. Temperature sensors are installed at the face air outlet and foot air outlet, which can feed back the air outlet temperature of the air conditioner (HVAC) to the controller to realize automatic control of the air outlet temperature.

[0062] For other details, please refer to the existing technology.

[0063] The above description is only a preferred embodiment of the present utility model. It should be noted that those skilled in the art can make several changes and improvements without departing from the overall concept of the present utility model, and these should also be considered within the protection scope of the present utility model.

Claims

1. An automotive air conditioning (HVAC) assembly, comprising a housing (10), wherein the housing (10) is provided with an air inlet assembly (12), an air outlet assembly (13), and an air duct (14) connecting the air inlet assembly (12) and the air outlet assembly (13), characterized in that: An internal circulation air inlet (41) and an external circulation air inlet (40) are fixed on the air inlet assembly (12). An arc-shaped track (18) is provided on the air inlet assembly (12). A pull-out integrated filter (30) is provided in the space (181) inside the track of the arc-shaped track (18). The filter (30) covers the area of ​​the internal circulation air inlet (41) and the external circulation air inlet (40). The track entrance (182) of the arc-shaped track (18) is exposed to the outside of the automotive air conditioning HVAC assembly.

2. The automotive air conditioning HVAC assembly as described in claim 1, characterized in that: The frame of the filter (30) is an elastic element; The track inlet (182) is set at the foot position (93) of the co-driver in the cab. The "track of the pull-out direction (98)" of the filter (30) matches the "contour of the floor (92) of the foot position (93) of the co-driver in the cab" to facilitate the replacement of the filter. An inner positioning member and an outer positioning member are fixed on the filter screen (30). The inner positioning member can prevent the filter screen (30) from moving inward in the inner space (181) of the track, and the outer positioning member can prevent the filter screen (30) from moving outward in the inner space (181) of the track.

3. The automotive air conditioning (HVAC) assembly as described in claim 2, characterized in that: The inner positioning component is an outer baffle (31). Through the cooperation between the end face of the track entrance (182) of the arc track (18) and the outer baffle (31), the filter (30) is prevented from moving inward to one side within the track space (181). The inner positioning component is an elastic protrusion (33), which is engaged with the side panel (183) of the arc-shaped track (18); The elastic bump (33) is triangular; The elastic bumps (33) are in two groups and are distributed on both sides of the filter screen (30).

4. The automotive air conditioning HVAC assembly as described in claim 3, characterized in that: The track entrance (182) is a flared mouth, and the inner side of the outer baffle (31) is fixed with a cone-shaped body (32) that cooperates with the flared mouth. An elastic plate (34) is fixed on the filter screen (30). The elastic plate (34) extends along the axial direction of the filter screen (30). The elastic plate (34) is interference-fitted with the space (181) inside the track.

5. The automotive air conditioning HVAC assembly as described in claim 4, characterized in that: The air inlet assembly (12) is provided with a rotating air inlet damper (43). By rotating the air inlet damper (43), the air inlet assembly (12) can be adjusted to connect to the outside world through the internal circulation air inlet (41) and / or the external circulation air inlet (40). A compensation air inlet (42) is provided on the side of the internal circulation air inlet (41) of the air inlet assembly (12) away from the external circulation air inlet (40).

6. The automotive air conditioning HVAC assembly as described in claim 5, characterized in that: The air outlet assembly (13) is fixed with a face air outlet (21), a foot air outlet (22) and a defrost air outlet (23). The air outlet assembly (13) is provided with three air outlet dampers (24), which are distributed to correspond to the face air outlet (21), the foot air outlet (22) and the defrost air outlet (23). The edge of the air outlet damper (24) is fixed with damper sealing rubber (25).

7. The automotive air conditioning HVAC assembly as described in claim 6, characterized in that: The edge of the damper sealing rubber (25) is serrated, including multiple serrated rubber units (26), and the space between two adjacent serrated rubber units (26) is a serrated gap (29).

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