Double-layer flow HVAC air inlet box for automobile air conditioner
By incorporating a combination of convex rings and connecting grooves in the dual-layer HVAC air inlet box, along with thrust vanes and exhaust vanes, the problem of air leakage caused by the gap between the upper and lower chambers is solved, achieving effective airflow separation and circulation, and improving the performance of the air conditioning system and passenger comfort.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHONGQING SONGZ AUTOMOBILE AIR CONDITIONING CO LTD
- Filing Date
- 2023-10-31
- Publication Date
- 2026-07-21
AI Technical Summary
In a dual-layer HVAC air intake box, the gap between the upper and lower chambers causes air leakage, with unfiltered outside air mixing with the inside air, affecting passenger comfort.
A raised ring and a connecting groove are installed at the mounting hole in the middle of the partition plate. The raised ring is located in the connecting groove. When the double-layer impeller is running, it forms a tortuous channel. Combined with the reverse thrust blades and exhaust blades, it reduces airflow mixing. The structure is stable through the combination of clamping plates and connecting sleeves.
This effectively reduces airflow between the upper and lower chambers, lowers the possibility of unfiltered outside air mixing into the interior air, and improves the performance of the air conditioning system and passenger comfort.
Smart Images
Figure CN117400694B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of automotive air conditioning, and more particularly to a dual-layer HVAC air intake box for automotive air conditioning. Background Technology
[0002] During automobile manufacturing, an air conditioning system is installed inside the vehicle to improve user comfort, allowing for adjustments to the interior temperature and ventilation according to user needs. The dual-layer HVAC intake box is a crucial component of this system, simultaneously introducing 50% internal air and 50% external air (air outside the vehicle is considered external air, and air inside the vehicle is considered internal air). The heated internal air is then blown out through footwell ducts for overall vehicle heating; the heated external air is blown out through defrost ducts for defrosting and defogging the windows.
[0003] Specifically, the dual-layer flow HVAC air intake box includes a housing, dual-layer impellers, and a partition. The partition is fixedly installed inside the housing and divides the housing into upper and lower chambers. The housing has an air outlet communicating with the chambers. The dual-layer impeller includes two coaxially connected impeller bodies, which are rotatably connected to the housing and embedded in the middle of the partition, so that the two impeller bodies are located in the upper and lower chambers respectively. In use, the dual-layer impellers operate, allowing fresh outside air to be introduced into the upper chamber and then output from the air outlet. In addition, a filter device is installed on the outside of the dual-layer flow HVAC air intake box to filter the outside air and ensure better air quality. The lower chamber allows interior air from the vehicle to be introduced and then output from the air outlet, thus achieving the purpose of supplying air to the interior of the vehicle.
[0004] Because the double-layer impeller is moving while the baffle is stationary, a gap is left between the double-layer impeller and the baffle. However, during air supply, this gap can easily cause air to flow between the upper and lower chambers, resulting in outside air mixing directly into the interior air without being filtered, affecting passenger comfort. Summary of the Invention
[0005] In order to reduce the possibility of air leakage between the upper and lower chambers, reduce the possibility of unfiltered outside air mixing with the internal air, and improve the performance of the dual-layer HVAC air intake box, this application provides a dual-layer HVAC air intake box for automotive air conditioning.
[0006] This application provides a dual-layer flow HVAC air inlet box for automotive air conditioning, which adopts the following technical solution:
[0007] A dual-layer HVAC air intake box for automotive air conditioning includes a box body, a double-layer impeller, and a partition. The partition is fixedly installed inside the box body and divides the internal space of the box body into an upper chamber and a lower chamber. A mounting hole is provided in the middle of the partition, and an air outlet is provided in the box body. The double-layer impeller includes two impeller bodies coaxially connected. The double-layer impeller is rotatably connected to the box body and located in the mounting hole in the middle of the partition. The two impeller bodies are respectively located in the upper chamber and the lower chamber. A first connecting part is provided on the side wall of the double-layer impeller, and a second connecting part is provided on the opening edge of the mounting hole in the middle of the partition. One of the first connecting part and the second connecting part is set as a convex ring, and the other is set as a connecting groove. Both the convex ring and the connecting groove are annular and extend around the double-layer impeller. The convex ring is located in the connecting groove.
[0008] By adopting the above technical solution, during use, the double-layer impeller operates, allowing fresh outside air to be introduced into the upper chamber and then output from the air outlet. After being filtered by the external filter device of the double-layer HVAC air inlet box, it is discharged. The lower chamber introduces the interior air from the vehicle and then outputs it from the air outlet, thereby achieving the purpose of supplying air to the interior of the vehicle. During the operation of the double-layer impeller, a tortuous channel is formed between the convex ring and the inner wall of the connecting groove, making it difficult for the airflow in the upper and lower chambers to flow through the connecting groove. This reduces the possibility of air leakage between the upper and lower chambers, reduces the possibility of unfiltered outside air mixing with the interior air, and improves the performance of the double-layer HVAC air inlet box.
[0009] Optionally, a first clamping plate and a second clamping plate are detachably fixed to the edge of the mounting hole in the middle of the partition, and the gap between the first clamping plate and the second clamping plate is a connecting groove. The convex ring is coaxially fixed to the double-layer impeller.
[0010] By adopting the above technical solution, during installation, the first clamping plate and the second clamping plate are respectively installed on both sides of the partition, so that the convex ring is located between the first clamping plate and the second clamping plate, thus making the installation process relatively convenient.
[0011] Optionally, the first clamping plate and the second clamping plate are respectively clamped on both sides of the partition. The first clamping plate is formed with a plurality of connecting sleeves, and the second clamping plate is formed with a plurality of connecting pins. The plurality of connecting sleeves pass through the partition and are respectively connected to the plurality of connecting pins.
[0012] By adopting the above technical solution, during installation, the first clamping plate is clamped on one side of the partition, allowing multiple connecting sleeves to pass through the partition, thereby achieving a positioning effect on the first clamping plate; then the second clamping plate is clamped on the other side of the partition, and multiple connecting pins are inserted into the multiple connecting sleeves one by one, thereby realizing the installation of the first clamping plate and the second clamping plate.
[0013] Optionally, the convex ring has a groove on the side facing the upper chamber. The groove is annular and coaxial with the convex ring, and multiple thrust vanes are fixed in the groove.
[0014] By adopting the above technical solution, during the process of the double-layer impeller driving the convex ring to rotate, multiple reverse thrust blades will form airflow above the convex ring, further reducing the possibility of the outside air in the upper chamber flowing towards the connecting groove, and further reducing the possibility of the outside air mixing into the inside air.
[0015] Optionally, the thrust reverser blades are spaced apart from the bottom wall of the groove, and the side wall of the groove facing the middle of the double-layer impeller is provided with multiple airflow channels, which connect the upper chamber and the inside of the groove.
[0016] By adopting the above technical solution, the airflow channel can make the airflow inside the upper impeller body flow towards the groove, and then flow into the upper chamber through the reverse thrust blades, so that the upper part of the convex ring forms an airflow circulation in the upper chamber; thereby ensuring the normal operation of the reverse thrust; at the same time reducing the possibility of drawing the internal air in the lower chamber into the upper chamber, and improving the use effect.
[0017] Optionally, the convex ring has multiple exhaust blades fixed to its edge, the exhaust blades being located within the connecting groove, and the first clamping plate having multiple air outlets, the air outlets connecting the connecting groove and the upper chamber.
[0018] By adopting the above technical solution, during the process of the double-layer impeller driving the convex ring to rotate, multiple exhaust blades will rotate in the connecting groove, thereby forming airflow in the connecting groove, and the airflow will be discharged from the air outlet to the upper chamber, reducing the possibility of the outside air in the upper chamber flowing towards the connecting groove, and further reducing the possibility of the outside air mixing into the inside air.
[0019] Optionally, the second clamping plate is bent into a first blocking part with the edge of the connecting groove opening facing the convex ring, and the convex ring is formed into a second blocking part. Both the first blocking part and the second blocking part are used to block the gap between the second clamping plate and the convex ring.
[0020] By adopting the above technical solution, the first and second blocking parts can block the internal air in the lower chamber, so that the airflow in the connecting groove mainly comes from the upper chamber, thereby forming an airflow circulation between the connecting groove and the upper chamber, which can also reduce the possibility of the internal body in the lower chamber flowing into the upper chamber.
[0021] Optionally, the first clamping plate is provided with a plurality of flow guiding channels on the side facing the connecting groove. The flow guiding channels extend radially along the first clamping plate, and the air outlet is connected to the end of the flow guiding channel away from the convex ring.
[0022] By adopting the above technical solution, during the rotation of the exhaust blades, the airflow in the connecting groove will flow along the guide channel, and then the airflow will flow out from the air outlet more stably and accurately, thereby making the airflow in the connecting groove better, making the airflow circulation between the connecting groove and the upper chamber better, and improving the use effect.
[0023] Optionally, the air guide is provided at the opening edge of the flow channel facing the double-layer impeller.
[0024] By adopting the above technical solution, the air guide can guide the airflow, reduce the possibility of the airflow swirling inside the connecting groove, and make the airflow flow more smoothly into the air guide channel, thereby further improving the airflow effect.
[0025] Optionally, the housing includes two connected shells with openings facing each other. A connecting strip is formed on the outer edge of the partition, and a slot is formed on the opening edge of the shell. The connecting strip is clamped between the two shells and simultaneously engaged with the slots on both shells.
[0026] By adopting the above technical solution, during installation, it is only necessary to clamp the partition between the two housings, so that the connecting strip is clamped between the two housings and the connecting strip is engaged in the slot, thus making the installation of the partition and the air inlet box more convenient.
[0027] In summary, this application includes at least one of the following beneficial technical effects:
[0028] 1. During use, the double-layer impeller will form a tortuous channel between the convex ring and the inner wall of the connecting groove during operation, making it difficult for the airflow in the upper and lower chambers to flow through the connecting groove. This reduces the possibility of air leakage between the upper and lower chambers, reduces the possibility of unfiltered external air mixing into the internal air, and improves the performance of the double-layer HVAC air inlet box.
[0029] 2. During the rotation of the double-layer impeller driving the convex ring, multiple reverse thrust blades will form airflow above the convex ring, further reducing the possibility of the outside air in the upper chamber flowing towards the connecting groove, and further reducing the possibility of the outside air mixing with the inside air. Attached Figure Description
[0030] Figure 1 This is a schematic diagram of the structure of a dual-layer flow HVAC air inlet box for automotive air conditioning, according to Embodiment 1 of this application.
[0031] Figure 2 This is a cross-sectional view of an automotive air conditioning dual-layer flow HVAC air inlet box according to Embodiment 1 of this application;
[0032] Figure 3 yes Figure 2A magnified structural diagram of part A in the middle;
[0033] Figure 4 This is a cross-sectional view of a dual-layer HVAC air intake box for an automotive air conditioner, according to Embodiment 2 of this application.
[0034] Figure 5 yes Figure 4 A magnified structural diagram of part B in the middle section;
[0035] Figure 6 This is a cross-sectional view of a dual-layer HVAC air intake box for an automotive air conditioner, according to Embodiment 3 of this application.
[0036] Figure 7 yes Figure 6 A magnified structural diagram of section C.
[0037] Explanation of reference numerals in the attached drawings: 1. Housing; 11. Upper chamber; 12. Lower chamber; 13. Shell; 131. Slot; 2. Double-layer impeller; 21. Impeller body; 3. Partition; 31. Connecting groove; 311. First clamping plate; 3111. Connecting sleeve; 3121. Connecting pin; 3122. First blocking part; 312. Second clamping plate; 313. Air outlet; 314. Guide channel; 32. Connecting strip; 4. Protruding ring; 41. Embedded groove; 411. Airflow channel; 42. Second blocking part; 43. Air guide part; 5. Reverse thrust blade; 6. Exhaust blade. Detailed Implementation
[0038] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.
[0039] This application discloses a dual-layer flow HVAC air intake box for automotive air conditioning.
[0040] Example 1:
[0041] Reference Figure 1 and Figure 2 A dual-layer HVAC air intake box for automotive air conditioning includes a box body 1, a double-layer impeller 2, and a partition 3. The partition 3 is fixedly installed inside the box body 1 and is horizontally arranged, thereby dividing the internal space of the box body 1 into an upper chamber 11 and a lower chamber 12. A mounting hole is provided in the middle of the partition 3. An air outlet is provided in the box body 1 corresponding to the upper chamber 11 or the lower chamber 12. The double-layer impeller 2 includes two coaxially connected impeller bodies 21. The double-layer impeller 2 is rotatably connected to the box body 1 and embedded in the mounting hole in the middle of the partition 3. The two impeller bodies 21 are respectively located in the upper chamber 11 and the lower chamber 12.
[0042] When in use, the double-layer impeller 2 is operated. The upper chamber 11 can introduce fresh outside air, which is then output from the air outlet and filtered by the filter device outside the double-layer HVAC air inlet box before being discharged. The lower chamber 12 can introduce the interior air of the vehicle, which is then output from the air outlet, thereby achieving the purpose of supplying air to the interior of the car.
[0043] Reference Figure 2 The housing 1 includes two connected shells 13 with openings facing each other. A connecting strip 32 is formed on the outer edge of the partition 3. A slot 131 is provided on the edge of the opening of each shell 13, and the connecting strip 32 is clamped between the two shells 13, simultaneously engaging with the slots 131 on both shells 13. During installation, simply clamping the partition 3 between the two shells 13 is sufficient, making the installation of the partition 3 and the entire air inlet box more convenient.
[0044] Reference Figure 2 and Figure 3 Meanwhile, a first connecting part is provided on the side wall of the double-layer impeller 2, and a second connecting part is provided on the edge of the opening of the mounting hole in the middle of the partition plate 3. In this embodiment, the first connecting part is a convex ring 4, and the second connecting part is a connecting groove 31. The convex ring 4 is coaxially arranged with the double-layer impeller 2 and is located between the two impeller bodies 21. The connecting groove 31 is annular and extends around the double-layer impeller 2. The opening of the connecting groove 31 faces the double-layer impeller 2, and the convex ring 4 is located inside the connecting groove 31.
[0045] In other embodiments, the first connecting part may be configured as a connecting groove 31, and the second connecting part may be configured as a protruding ring 4.
[0046] The implementation principle of Example 1 is as follows: During use, when the double-layer impeller 2 is running, there is a certain gap between the convex ring 4 and the inner wall of the connecting groove 31, which makes it less likely to obstruct the rotation of the double-layer impeller 2. In addition, when the convex ring 4 rotates in the connecting groove 31, a tortuous channel is formed between the convex ring 4 and the inner wall of the connecting groove 31, making it difficult for the airflow in the upper chamber 11 and the lower chamber 12 to flow through the connecting groove 31, thereby reducing the possibility of air leakage between the upper chamber 11 and the lower chamber 12, reducing the possibility of unfiltered external air mixing into the internal air, and improving the performance of the double-layer flow HVAC air inlet box.
[0047] Example 2:
[0048] Reference Figure 4 and Figure 5The difference between this embodiment and the previous embodiment is that a first clamping plate 311 and a second clamping plate 312 are detachably fixed to the opening edge in the middle of the partition 3, and the first clamping plate 311 and the second clamping plate 312 are respectively clamped to both sides of the partition 3. The first clamping plate 311 is formed with a plurality of connecting sleeves 3111, and the second clamping plate 312 is formed with a plurality of connecting pins 3121. At this time, a plurality of insertion holes are opened on the partition 3.
[0049] During installation, the first clamping plate 311 is clamped to one side of the partition plate 3, and multiple connecting sleeves 3111 are inserted into the multiple sockets one by one, thereby providing a positioning effect for the first clamping plate 311. Then, the second clamping plate 312 is clamped to the other side of the partition plate 3, and multiple connecting pins 3121 are inserted into the multiple connecting sleeves 3111 one by one. Simultaneously, a gap is formed between the end of the first clamping plate 311 facing the double-layer impeller 2 and the end of the second clamping plate 312 facing the double-layer impeller 2, and this gap forms a connecting groove 31. This facilitates the installation process of placing the convex ring 4 within the connecting groove 31.
[0050] Reference Figure 5 A groove 41 is formed on the side of the convex ring 4 facing the upper chamber 11. The groove 41 is annular and coaxial with the convex ring 4. Multiple thrust vanes 5 are fixed inside the groove 41 and are evenly distributed along the circumference of the groove 41. Furthermore, the thrust vanes 5 are spaced apart from the bottom wall of the groove 41. Multiple airflow channels 411 are also formed on the side wall of the groove 41 facing the middle of the double-layer impeller 2. The airflow channels 411 connect the upper chamber 11 and the interior of the groove 41.
[0051] As the double-layer impeller 2 drives the convex ring 4 to rotate, multiple thrust blades 5 create airflow above the convex ring 4, further reducing the possibility of external air flowing into the connecting groove 31 from the upper chamber 11. Furthermore, the airflow channel 411 allows the airflow inside the upper impeller body 21 to flow into the groove 41, and then through the thrust blades 5 into the upper chamber 11, creating an airflow circulation on the upper part of the convex ring 4 within the upper chamber 11. This ensures the normal operation of the airflow thrust and reduces the possibility of drawing internal air from the lower chamber 12 into the upper chamber 11, improving performance.
[0052] The implementation principle of Example 2 is as follows: During the process of the double-layer impeller 2 driving the convex ring 4 to rotate, multiple reverse thrust blades 5 will form airflow above the convex ring 4, so that the upper part of the convex ring 4 forms airflow circulation in the upper chamber 11, further reducing the possibility of the outside air in the upper chamber 11 flowing into the connecting groove 31, and further reducing the possibility of the upper chamber 11 and the lower chamber 12 interfering with each other at the connecting groove 31.
[0053] Example 3:
[0054] Reference Figure 6 and Figure 7 The difference between this embodiment and the above embodiment is that multiple exhaust blades 6 are fixed on the edge of the convex ring 4, the exhaust blades 6 are located in the connecting groove 31, and the multiple exhaust blades 6 are distributed along the circumference of the convex ring 4. The first clamping plate 311 has multiple air outlet holes 313, which are connected to the connecting groove 31 and the upper chamber 11.
[0055] Reference Figure 7 At this time, the second clamping plate 312 is bent towards the edge of the groove opening of the connecting groove 31 and the protruding ring 4 to form a first blocking part 3122. The protruding ring 4 is formed with a second blocking part 42 on the side facing the second clamping plate 312, so that the first blocking part 3122 and the second blocking part 42 overlap.
[0056] During the rotation of the double-layer impeller 2 and the convex ring 4, multiple exhaust blades 6 rotate within the connecting groove 31, thereby forming an airflow within the connecting groove 31. This airflow is then discharged from the air outlet 313 into the upper chamber 11. At this time, the first blocking part 3122 and the second blocking part 42 can block the internal air in the lower chamber 12, ensuring that the airflow in the connecting groove 31 mainly originates from the interior of the upper chamber 11. This creates an airflow circulation between the connecting groove 31 and the upper chamber 11, further reducing the possibility of external air from the upper chamber 11 mixing into the lower chamber 12 and improving the performance. It also reduces the possibility of the contents of the lower chamber 12 leaking into the upper chamber 11.
[0057] Reference Figure 7 The first clamping plate 311 has multiple flow channels 314 extending radially therefrom, and the multiple flow channels 314 are distributed at intervals around the first clamping plate 311. The air outlet 313 is connected to the end of the flow channel 314 away from the convex ring 4, and the opening edge of the flow channel 314 facing the double-layer impeller 2 is provided with an air guide part 43.
[0058] During the rotation of the exhaust blades 6, the airflow within the connecting groove 31 flows along the guide channel 314, subsequently flowing out more stably and accurately from the air outlet 313. This results in better airflow within the connecting groove 31 and improved air circulation between the connecting groove 31 and the upper chamber 11, enhancing the overall performance. Furthermore, the provided air guide 43 guides the airflow, reducing the likelihood of internal swirl within the connecting groove 31 and ensuring smoother flow into the guide channel 314, further improving airflow efficiency.
[0059] The implementation principle of Example 3 is as follows: During the rotation of the double-layer impeller 2 and the convex ring 4, multiple exhaust blades 6 will rotate within the connecting groove 31, thereby forming an airflow within the connecting groove 31. The airflow will be discharged from the air outlet 313 into the upper chamber 11. This further reduces the possibility of external air in the upper chamber 11 mixing into the lower chamber 12, improving the performance.
[0060] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A dual-layer HVAC air intake box for automotive air conditioning, comprising a box body (1), a double-layer impeller (2), and a partition (3), wherein the partition (3) is fixedly installed inside the box body (1) and divides the internal space of the box body (1) into an upper chamber (11) and a lower chamber (12), wherein the partition (3) has a mounting hole in the middle, and the box body (1) has an air outlet, wherein the double-layer impeller (2) comprises two coaxially connected impeller bodies (21), the double-layer impeller (2) is rotatably connected to the box body (1) and located in the mounting hole in the middle of the partition (3), wherein the two impeller bodies (21) are respectively located in the upper chamber (11) and the lower chamber (12), characterized in that: The double-layer impeller (2) has a first connecting part on its side wall, and the middle mounting hole of the partition plate (3) has a second connecting part on its opening edge. Of the first connecting part and the second connecting part, one is a convex ring (4) and the other is a connecting groove (31). The convex ring (4) and the connecting groove (31) are both annular and extend around the double-layer impeller (2). The convex ring (4) is located inside the connecting groove (31). The first clamping plate (311) and the second clamping plate (312) are detachably fixed to the edge of the mounting hole in the middle of the partition plate (3). The gap between the first clamping plate (311) and the second clamping plate (312) is a connecting groove (31). The convex ring (4) is coaxially fixed to the double-layer impeller (2). The convex ring (4) has a groove (41) on the side facing the upper chamber (11). The groove (41) is annular and coaxial with the convex ring (4). Multiple thrust vanes (5) are fixed in the groove (41). The reverse thrust blade (5) is separated from the bottom wall of the groove (41). The groove (41) is also provided with multiple airflow channels (411) on the side wall facing the middle of the double-layer impeller (2). The airflow channels (411) connect the upper chamber (11) and the inside of the groove (41).
2. The automotive air conditioning dual-layer flow HVAC air intake box according to claim 1, characterized in that: The first clamping plate (311) and the second clamping plate (312) are respectively clamped on both sides of the partition (3). The first clamping plate (311) is formed with a plurality of connecting sleeves (3111), and the second clamping plate (312) is formed with a plurality of connecting pins (3121). The plurality of connecting sleeves (3111) pass through the partition (3) and are respectively connected to the plurality of connecting pins (3121).
3. The automotive air conditioning dual-layer flow HVAC air intake box according to claim 1, characterized in that: The convex ring (4) has multiple exhaust blades (6) fixed on its edge. The exhaust blades (6) are located in the connecting groove (31). The first clamping plate (311) has multiple air outlet holes (313). The air outlet holes (313) connect the connecting groove (31) and the upper chamber (11).
4. The automotive air conditioning dual-layer flow HVAC air intake box according to claim 3, characterized in that: The second clamping plate (312) is bent towards the edge of the groove of the connecting groove (31) and towards the convex ring (4) to form a first blocking part (3122). The convex ring (4) is formed with a second blocking part (42). The first blocking part (3122) and the second blocking part (42) are both used to block the gap between the second clamping plate (312) and the convex ring (4).
5. The automotive air conditioning dual-layer flow HVAC air intake box according to claim 3, characterized in that: The first clamping plate (311) has a plurality of flow channels (314) on one side facing the connecting groove (31). The flow channels (314) extend radially along the first clamping plate (311), and the air outlet (313) is connected to the end of the flow channel (314) away from the convex ring (4).
6. The automotive air conditioning dual-layer flow HVAC air intake box according to claim 5, characterized in that: The air guide (314) has an air guide (43) on the opening edge facing the double impeller (2).
7. The automotive air conditioning dual-layer flow HVAC air intake box according to claim 1, characterized in that: The box (1) includes two connected shells (13), which are opened facing each other. A connecting strip (32) is formed on the outer edge of the partition (3). A slot (131) is provided on the opening edge of the shell (13). The connecting strip (32) is clamped between the two shells (13) and simultaneously engaged with the slots (131) on the two shells (13).