Middle-mounted double-layer flow air conditioner

Abstract

An air inlet assembly formed by communicating an air inlet box and an air supply box is arranged on the front side of a heat exchange box, and the air inlet box and the air supply box are distributed in the left-right direction, so that the size of the middle-mounted double-layer flow air conditioner in the left-right direction is reduced; the spiral tail end of the volute structure extends downwards and forms a forward air supply outlet to be communicated with the heat exchange box, and compared with the mode that an air supply outlet is directly formed in the face, opposite to the heat exchange box in the front-back direction, of the volute structure, the size of the middle-mounted double-layer-flow air conditioner in the front-back direction is reduced advantageously; besides, a concave receding part is formed on the side, opposite to the volute structure in the front-back direction, of the heat exchange box and used for receding the volute structure, so that the structure of the middle-mounted double-layer-flow air conditioner is more compact, and the size of the middle-mounted double-layer-flow air conditioner in the front-back direction can be further reduced; therefore, the central-positioned double-layer flow air conditioner can effectively solve the problem that an existing central-positioned double-layer flow air conditioner is large in size, and is favorable for reducing difficulty and cost of designing and manufacturing vehicles.

Description

A centrally located dual-layer air conditioner Technical Field

[0001] This utility model belongs to the technical field of general vehicle heating, cooling or ventilation equipment, and specifically relates to a centrally located dual-layer air conditioner. Background Technology

[0002] Dual-layer air conditioning in automobiles is a system that separates airflow into upper and lower layers, allowing for independent control of airflow inside and outside the vehicle. This enables more efficient utilization of airflow, improving comfort and energy efficiency. As shown in Figure 1, a conventional dual-layer air conditioning system mainly consists of an air intake box 1, an air supply box 2, and a heat exchange box 3 connected in sequence. The air intake and air supply boxes are vertically distributed (in the vehicle height direction), while the air intake assembly formed by their connection and the heat exchange box are horizontally distributed (in the vehicle width direction). The air intake box has return air inlets and fresh air inlets. The air supply box, through a blower and a volute, delivers return air and fresh air to the heat exchange box respectively. The heat exchange box has defrost vents 4, front face vents 5, front foot vents 6, rear face vents 7, and rear foot vents 8. The heat exchange box controls the airflow from each vent through internal air ducts, dampers, heating elements, and the heat exchange core of the evaporator to meet the needs of defrosting, defogging, and heating / cooling the vehicle interior.

[0003] To meet the driving requirements of different regions, automakers typically design and produce both right-hand drive and left-hand drive versions of the same model. However, conventional dual-flow air conditioners are relatively large and are usually located on the passenger side of the dashboard. Furthermore, the structural layout of the driver's cab differs between right-hand drive and left-hand drive vehicles. Additionally, installing conventional dual-flow air conditioners on right-hand drive and left-hand drive vehicles often requires developing different molds, resulting in higher costs. Therefore, most models that are produced for both right-hand drive and left-hand drive use a centrally located dual-flow air conditioner. This means that the dual-flow air conditioner and its corresponding interfaces are located in the center of the dashboard, allowing the same dual-flow air conditioner to meet the installation and usage requirements of both right-hand drive and left-hand drive vehicles. However, current centrally located dual-layer air conditioning units are structurally complex and still relatively large in size. For example, the centrally located dual-layer air conditioning unit disclosed in Chinese patent CN216683996U (see Figure 2 in its specification) is different from conventional dual-layer air conditioning units. This patent directly connects the air intake box and the air supply box to form an integral unit, which is distributed in the front and rear (in the vehicle length direction) with the heat exchange box, thereby reducing the size in the vehicle width direction. However, the structure of the air intake box, the air supply box, and the heat exchange box, as well as the connection structure between them, have not been effectively optimized for volume. The overall volume is still large, especially in the vehicle length direction, where it occupies a lot of space in the front and rear of the dashboard. This may lead to difficulties in the design and layout of other structures and parts in the dashboard. Therefore, it is necessary to design a centrally located dual-layer air conditioning unit with a simple structure and small volume to reduce the difficulty of vehicle development and design and manufacturing costs. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the existing technology, the purpose of this utility model is to provide a centrally located dual-layer air conditioner, which solves the technical problem of the large size of the current centrally located dual-layer air conditioner and achieves the effect of reducing the difficulty and cost of vehicle design and manufacturing.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A centrally located dual-layer flow air conditioner includes an air inlet box, an air outlet box, and a heat exchange box. The air inlet box and the air outlet box are arranged side-by-side and connected to form an air inlet assembly. The heat exchange box and the air inlet assembly are arranged front-to-back and connected to the air outlet box. The air outlet box includes a volute structure corresponding to the axial and left-to-right directions. The spiral end of the volute structure extends away from the volute structure in the vertical direction, and the spiral end faces the heat exchange box in the front-to-back direction and forms an air outlet connected to the heat exchange box. The heat exchange box has an arc-shaped recessed relief portion on the side facing the air inlet assembly in the front-to-back direction. The volute structure portion is located in the recessed relief portion, and multiple air outlets are opened on the other side.

[0007] Furthermore, the air inlet box has a fresh air inlet, a return air inlet, and an air outlet, and the air outlet of the air inlet box is directly connected to the air outlet of the air supply box in the left-right direction.

[0008] Furthermore, the air inlet box is located to the right of the air supply box, the heat exchange box is located behind the air inlet assembly, the fresh air inlet faces forward, and there are two return air inlets, including a first return air inlet and a second return air inlet distributed front to back. The first return air inlet is close to the fresh air inlet. A first damper and a second damper are rotatably installed inside the air inlet box. The first damper is used to adjust the air intake of the fresh air inlet and the first return air inlet, and the second damper is used to adjust the air intake of the second return air inlet. A blower is located on the left side of the volute structure. The impeller of the blower is located inside the volute structure. The impeller is cylindrical and its axis corresponds to the left and right directions. The impeller includes two parallel and opposite annular connecting plates and several blades evenly distributed circumferentially between the two annular connecting plates. Inside the volute structure, an annular air supply baffle is coaxially installed on the outside of the impeller. The air supply baffle divides the internal space of the volute structure outside the impeller into a left chamber and a right chamber. The air supply baffle has an extension plate segment extending along the end of the spiral, which divides the air supply outlet into a first air supply outlet communicating with the left chamber and a second air supply outlet communicating with the right chamber. A partition sleeve is coaxially provided on the inner side of the impeller, with a radial distance between the partition sleeve and the impeller. The left end of the partition sleeve corresponds to the position of the air supply baffle in the left-right direction. The left end of the partition sleeve is tapered and extends radially close to the air supply baffle, so that the inner side of the partition sleeve communicates with the left chamber and the first air supply outlet through the gap between the blades, and the outer side communicates with the right chamber and the second air supply outlet through the gap between the blades. The right end of the partition sleeve extends into the air inlet box and is biased towards the second return air inlet. Part of the right edge of the partition sleeve abuts against the inner wall of the air inlet box, and the other part extends to form an air inlet baffle. The air inlet baffle can abut against the second damper and make the interior of the partition sleeve communicate only with the second return air inlet.

[0009] Furthermore, the first air outlet and the second air outlet are distributed vertically at the end of the spiral to connect to the heat exchange box.

[0010] Furthermore, a heat exchange core is provided inside the heat exchange box, and a refrigerant delivery pipe is provided outside the heat exchange box. One end of the refrigerant delivery pipe extends into the heat exchange box and connects to the heat exchange core, while the other end is connected to an interface pipe. The interface pipe is fixed on a mounting base on the front side of the air supply box.

[0011] Furthermore, the air outlets of the heat exchange box include defrost air outlets, front air outlets for blowing air towards the face, front air outlets for blowing air towards the feet, rear air outlets for blowing air towards the face, and rear air outlets for blowing air towards the feet.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The centrally located dual-layer air conditioner of this invention places the air intake assembly, formed by connecting the air intake box and the air supply box, in front of the heat exchange box, and arranges the air box and the air supply box in a left-right distribution, which helps to reduce the size of the centrally located dual-layer air conditioner in the left-right direction. The spiral end of the volute structure extends downward to form a forward-facing air outlet that connects with the heat exchange box. Compared with forming the air outlet directly on the front-rear opposite surfaces of the volute structure and the heat exchange box, this helps to reduce the size of the centrally located dual-layer air conditioner in the front-rear direction. In addition, the heat exchange box forms a recessed clearance part on the side opposite to the volute structure to make room for the volute structure, making the structure of the centrally located dual-layer air conditioner more compact, which can further reduce the size of the centrally located dual-layer air conditioner in the front-rear direction. Therefore, this invention can effectively solve the problem of the large size of the current centrally located dual-layer air conditioner, which helps to reduce the difficulty and cost of vehicle design and manufacturing. Attached Figure Description

[0014] Figure 1 is a perspective view of the conventional dual-flow air conditioner described in the background art;

[0015] Figure 2 is a perspective view of the centrally located dual-layer air conditioner described in the embodiment;

[0016] Figure 3 is a front view of the centrally located dual-flow air conditioner described in the embodiment;

[0017] Figure 4 is a top view of the centrally located dual-layer air conditioner described in the embodiment;

[0018] Figure 5 is a right view of the centrally located dual-layer air conditioner described in the embodiment;

[0019] Figure 6 is a left view of the centrally located dual-layer air conditioner described in the embodiment;

[0020] Figure 7 is a schematic diagram of the cross section along AA in Figure 6;

[0021] Figure 8 is a schematic diagram of Figure 6 with the heat exchange box hidden;

[0022] Figure 9 is a three-dimensional view of the structure corresponding to Figure 8;

[0023] Figure 10 is a three-dimensional view of Figure 9 with the air intake box hidden;

[0024] The components include: air inlet box 1, air supply box 2, heat exchange box 3, defrost vent 4, front air inlet 5, front air outlet 6, rear air inlet 7, rear air outlet 8, air inlet assembly 9, volute structure 10, spiral end 11, recessed clearance part 12, fresh air inlet 13, air supply inlet 14, first return air inlet 15, second return air inlet 16, first damper 17, second damper 18, blower 19, impeller 20, annular connecting plate 21, blade 22, air supply baffle 23, left chamber 24, right chamber 25, extension plate section 26, first air supply outlet 27, second air supply outlet 28, partition sleeve 29, air inlet baffle 30, refrigerant delivery pipe 31, interface pipe 32, and mounting base 33. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0026] Example:

[0027] Please refer to Figures 2, 4, and 6. A centrally located dual-layer flow air conditioner includes an air inlet box 1, an air outlet box 2, and a heat exchange box 3. The air inlet box 1 and the air outlet box 2 are arranged horizontally and connected to form an air inlet assembly 9. The heat exchange box 3 and the air inlet assembly 9 are arranged front-to-back and connected to the air outlet box 2. The air outlet box 2 includes a volute structure 10 with the axial direction corresponding to the left-to-right direction. The spiral end 11 of the volute structure 10 extends away from the volute structure 10 in the vertical direction, and the spiral end 11 faces the heat exchange box 3 in the front-to-back direction and forms an air outlet connected to the heat exchange box 3. The heat exchange box 3 has an arc-shaped recessed relief portion 12 on one side facing the air inlet assembly 9 in the front-to-back direction. The volute structure 10 is partially located in the recessed relief portion 12, and multiple air outlets are opened on the other side. In this embodiment, the description of vertical and horizontal directions is based on the state shown in Figure 3, where the direction facing the paper is the front.

[0028] The centrally located dual-layer air conditioner of this utility model places the air intake assembly 9, formed by connecting the air intake box 1 and the air supply box 2, in front of the heat exchange box 3, and arranges the air box and the air supply box 2 in a left-right distribution, which helps to reduce the size of the centrally located dual-layer air conditioner in the left-right direction (vehicle width direction). The spiral end 11 of the volute structure 10 extends downward and forms a forward air outlet that connects with the heat exchange box 3. Compared with the volute structure 10 forming an air outlet that connects with the heat exchange box 3 directly at a position opposite to the front and rear of the heat exchange box 3, this helps to reduce the size of the centrally located dual-layer air conditioner in the front and rear direction. In addition, the heat exchange box 3 forms a recessed clearance part 12 on the side opposite to the front and rear of the volute structure 10 to make room for the volute structure 10, making the structure of the centrally located dual-layer air conditioner more compact and further reducing the size of the centrally located dual-layer air conditioner in the front and rear direction. Therefore, this utility model can effectively solve the problem of the large size of the current centrally located dual-layer air conditioner, which helps to reduce the difficulty and cost of vehicle design and manufacturing.

[0029] Please refer to Figures 3, 4, and 5. The air intake box 1 has a fresh air inlet 13, a return air inlet, and an air outlet. The air outlet of the air intake box 1 is directly connected to the air inlet 14 of the air supply box 2 in the left-right direction. In this way, the air intake box 1 introduces fresh air from outside the vehicle through the fresh air inlet 13 and returns air from inside the vehicle through the return air inlet. This is the basis for realizing independent control of airflow inside and outside the vehicle by the centrally located dual-layer flow air conditioner. The direct connection between the air outlet of the air intake box 1 and the air inlet 14 of the air supply box 2 in the left-right direction makes the air intake assembly 9 formed by the connection of the air intake box 1 and the air supply box 2 more compact, which is conducive to reducing the size of the air intake assembly 9 in the left-right direction and reducing space occupation.

[0030] Please refer to Figures 6, 7, and 10. The air inlet box 1 is located to the right of the air supply box 2, and the heat exchange box 3 is located behind the air inlet assembly 9. The fresh air inlet 13 is positioned facing forward, and there are two return air inlets, including a first return air inlet 15 and a second return air inlet 16 distributed front to back. The first return air inlet 15 is close to the fresh air inlet 13. A first damper 17 and a second damper 18 are rotatably installed inside the air inlet box 1. The first damper 17 is used to rotate and adjust the air intake of the fresh air inlet 13 and the first return air inlet 15, and the second damper 18 is used to rotate and adjust the air intake of the second return air inlet 16. The air intake volume of port 16; a blower 19 is provided on the left side of the volute structure 10, and the impeller 20 of the blower 19 is located inside the volute structure 10. The impeller 20 is cylindrical and its axis corresponds to the left and right directions. The impeller 20 includes two parallel and facing annular connecting plates 21 and a number of blades 22 that are connected between the two annular connecting plates 21 and are evenly distributed circumferentially; an annular air supply baffle 23 is provided coaxially outside the impeller 20 inside the volute structure 10. The air supply baffle 23 divides the internal space of the volute structure 10 outside the impeller 20 into a left chamber 24 and a right chamber 25. Chamber 25, air supply baffle 23 has an extension plate segment 26 extending along the spiral end 11, the extension plate segment 26 divides the air supply outlet into a first air supply outlet 27 communicating with the left chamber 24 and a second air supply outlet 28 communicating with the right chamber 25; a partition sleeve 29 is coaxially provided inside the impeller 20, the partition sleeve 29 is radially spaced from the impeller 20, the left end of the partition sleeve 29 corresponds to the position of the air supply baffle 23 in the left-right direction, the left end of the partition sleeve 29 is tapered and extends radially close to the air supply baffle 23. The inner side of the partition sleeve 29 is connected to the left chamber 24 and the first air outlet 27 through the gap between the blades 22, and the outer side is connected to the right chamber 25 and the second air outlet 28 through the gap between the blades 22. The right end of the partition sleeve 29 extends into the air inlet box 1 and is biased towards the second return air inlet 16. Part of the right edge of the partition sleeve 29 abuts against the inner wall of the air inlet box 1, and the other part extends to form an air inlet baffle 30. The air inlet baffle 30 can abut against the second damper 18 and make the interior of the partition sleeve 29 only connected to the second return air inlet 16.

[0031] Thus, as shown in Figure 7, when the first damper 17 blocks the first return air inlet 15 and the second damper 18 blocks the second return air inlet 16, the air inlet box 1 only receives fresh air from outside the vehicle through the fresh air inlet 13. Fresh air from outside the vehicle can simultaneously exist on both the outside and inside of the partition sleeve 29 within the air inlet box 1, allowing both the first air outlet 27 and the second air outlet 28 of the air supply box 2 to input fresh air from outside the vehicle into the heat exchange box 3. In this state, if the second damper 18 rotates to fully open the second return air inlet 16, the inside of the partition sleeve 29 can only communicate with the second return air inlet 16. At this time, the return air from inside the vehicle reaches the left chamber 24 through the partition sleeve 29 and is input into the heat exchange box 3 through the first air outlet 27, while the fresh air from outside the vehicle reaches the right chamber 25 outside the partition sleeve 29 and is input into the heat exchange box 3 through the second air outlet 28, thereby achieving independent control of the airflow inside and outside the vehicle. When the first damper 17 rotates a certain angle... When the fresh air inlet 13 and the first return air inlet 15 are opened simultaneously, the air inlet box 1 receives fresh air from outside the vehicle and return air from inside the vehicle through the fresh air inlet 13 and the first return air inlet 15, respectively. The fresh air from outside the vehicle and the return air from inside the vehicle can mix and coexist on the outside and inside of the partition sleeve 29, so that the first air outlet 27 and the second air outlet 28 of the air supply box 2 both input mixed air into the heat exchange box 3. In this state, if the second damper 18 is rotated to fully open the second return air inlet 16, the inside of the partition sleeve 29 can be connected only to the second return air inlet 16. At this time, only the return air from inside the vehicle is introduced into the inside of the partition sleeve 29. In summary, by controlling the first damper 17 and the second damper 18, the first air outlet 27 and the second air outlet 28 can output fresh air from outside the vehicle, return air from inside the vehicle, and mixed air, respectively. In conjunction with the internal air duct design of the heat exchange box 3, it can meet the functional requirements of defrosting, defogging, heating and cooling inside the vehicle.

[0032] Please refer to Figures 8, 9 and 10. The first air outlet 27 and the second air outlet 28 are distributed vertically at the spiral end 11. Thus, as shown in Figures 9 and 10, the extension plate segment 26 cooperates with the structure of the spiral end 11 to make the first air outlet 27 and the second air outlet 28 distributed vertically, so as to adapt to the internal structure of the heat exchange box 3 with its upper and lower layered air intake.

[0033] Please refer to Figures 5, 6, and 7. The heat exchange box 3 is equipped with a heat exchange core, and a refrigerant delivery pipe 31 is provided outside the heat exchange box 3. One end of the refrigerant delivery pipe 31 extends into the heat exchange box 3 and connects to the heat exchange core, while the other end is connected to an interface pipe 32. The interface pipe 32 is fixed on the mounting base 33 on the front side of the air supply box 2. In this way, the interface pipe 32 and the fresh air inlet 13 are both located on the front side, which not only facilitates connection with relevant structures inside the vehicle, but also occupies the same space in the front-rear direction, which helps to reduce the size of the centrally located dual-layer flow air conditioner in the left-right direction. When designing left-hand drive and right-hand drive vehicles, it is only necessary to ensure that the relevant structures connected to the interface pipe 32 and the fresh air inlet 13 are set in the same position in the vehicle width direction, so that the centrally located dual-layer flow air conditioner can be adapted to both left-hand drive and right-hand drive vehicles.

[0034] Please refer to Figures 2 and 3. The air outlets of the heat exchange box 3 include defrost air outlet 4, front air outlet 5, front air outlet 6, rear air outlet 7, and rear air outlet 8. The internal structure of the heat exchange box 3 is an existing design and will not be described in detail here. In this way, the air outlets of the centrally located dual-layer flow air conditioner are complete, and there is no functional reduction compared to conventional dual-layer flow air conditioners.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of this utility model that do not depart from the spirit and scope of this technical solution should be covered within the scope of the claims of this utility model.

Claims

1. A middle set double-layer flow air conditioner, characterized in that: The system includes an air inlet box, an air outlet box, and a heat exchange box. The air inlet box and the air outlet box are arranged side to side and connected to form an air inlet assembly. The heat exchange box and the air inlet assembly are arranged front to back and connected to the air outlet box. The air outlet box includes a volute structure that corresponds to the axial and left-right directions. The spiral end of the volute structure extends away from the volute structure in the vertical direction, and the spiral end faces the heat exchange box in the front-back direction and forms an air outlet connected to the heat exchange box. The heat exchange box has an arc-shaped recessed relief portion on the side facing the air inlet assembly in the front-back direction. The volute structure portion is located in the recessed relief portion, and multiple air outlets are opened on the other side.

2. The centrally located dual-layer air conditioner according to claim 1, characterized in that: The air inlet box has a fresh air inlet, a return air inlet, and an air outlet. The air inlet and outlet of the air inlet box are directly connected to the air outlet of the air supply box in the left-right direction.

3. The middle-located double-layer flow air conditioner according to claim 2, characterized in that: The air inlet box is located to the right of the air supply box, and the heat exchange box is located behind the air inlet assembly. The fresh air inlet faces forward, and there are two return air inlets, including a first return air inlet and a second return air inlet distributed front to back. The first return air inlet is close to the fresh air inlet. A first damper and a second damper are rotatably mounted inside the air inlet box. The first damper is used to adjust the airflow of the fresh air inlet and the first return air inlet, and the second damper is used to adjust the airflow of the second return air inlet. A blower is located on the left side of the volute structure. The blower impeller is located inside the volute structure and is cylindrical with its axis corresponding to the left and right directions. The impeller includes two parallel, facing annular connecting plates and several blades evenly distributed circumferentially between the two annular connecting plates. Inside the volute structure, an annular air supply baffle is coaxially mounted outside the impeller. The air supply baffle divides the internal space of the volute structure outside the impeller into a left chamber and a right chamber, supplying air... The baffle has an extension plate segment extending along the end of the spiral, which divides the air outlet into a first air outlet communicating with the left chamber and a second air outlet communicating with the right chamber. A partition sleeve is coaxially provided on the inner side of the impeller, with a radial distance between the partition sleeve and the impeller. The left end of the partition sleeve corresponds to the position of the air supply baffle in the left-right direction. The left end of the partition sleeve is tapered and extends radially close to the air supply baffle, so that the inner side of the partition sleeve communicates with the left chamber and the first air outlet through the gap between the blades, and the outer side communicates with the right chamber and the second air outlet through the gap between the blades. The right end of the partition sleeve extends into the air inlet box and is biased towards the second return air inlet. Part of the right edge of the partition sleeve abuts against the inner wall of the air inlet box, and the other part extends to form an air inlet baffle. The air inlet baffle can abut against the second damper and make the interior of the partition sleeve communicate only with the second return air inlet.

4. The middle-located double-layer flow type air conditioner according to claim 1, characterized in that: The first and second air outlets are positioned vertically at the end of the spiral to connect to the heat exchange box.

5. The middle-located double-layer flow type air conditioner according to claim 1, wherein: The heat exchange box contains a heat exchange core and a refrigerant delivery pipe outside the heat exchange box. One end of the refrigerant delivery pipe extends into the heat exchange box and connects to the heat exchange core, while the other end is connected to an interface pipe. The interface pipe is fixed on a mounting base on the front side of the air supply box.

6. The middle-located double-layer flow type air conditioner according to claim 1, wherein: The heat exchange box has defrost vents, front air vents for blowing air towards the face, front air vents for blowing air towards the feet, rear air vents for blowing air towards the face, and rear air vents for blowing air towards the feet.

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