Centralized double-flow air conditioner

Abstract

The present invention discloses a central double-flow air conditioner, which includes an air conditioner box housing assembly. The air conditioner box housing assembly has a middle partition board and outer housings symmetrically installed on both sides of the middle partition board. An air flow channel is formed between each of the two groups of outer housings and the middle partition board. Both of the two air flow channels are provided with an air inlet end and an air outlet end. A group of confluence housings are respectively installed at the positions of the two groups of outer housings corresponding to the air inlet ends. The confluence housing has an internal circulation air inlet and an external circulation air inlet. A damper is rotatably assembled in each of the two groups of confluence housings, and the damper can close the internal circulation air inlet or the external circulation air inlet in an alternative manner. The beneficial effect of the present invention is that by controlling the rotation of the damper, the two air flow channels can respectively select different circulation modes, so as to simultaneously achieve the purpose of defrosting the vehicle window and heating the driver and passengers.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive air conditioners, and particularly to a mid-mounted double-flow air conditioner. Background Art

[0002] An automotive air conditioning system is a device for realizing refrigeration, heating, ventilation, and air purification of the air inside the vehicle compartment, which can provide a comfortable riding environment for passengers and reduce the fatigue intensity of the driver.

[0003] In the prior art, there are various layout forms of automotive air conditioners, such as: split type, top-mounted type, horizontal-mounted type, etc. The traditional horizontal-mounted air conditioner main unit assembly is usually arranged under the instrument panel in the cab. Since its blower is horizontally arranged and the layout structure unit is relatively complex, the proportion of the main space in the Y direction is relatively large, which is not conducive to the effective utilization of the interior space of the whole vehicle. In addition, the traditional automotive air conditioner generally has only one circulation flow channel, that is, the internal circulation and the external circulation share one flow channel. In this way, when the air conditioner is running, only one of the circulation methods can be selected to cool or heat the interior of the vehicle. However, the defect of such a design is that in cold winters, the windows are prone to frosting, so the external circulation needs to be turned on to defrost the windows. However, the air introduced by the external circulation is cold air, which will make the driver feel uncomfortable. If only the internal circulation is turned on to provide warm air for the interior environment, the defrosting efficiency of the air conditioner will be low. Summary of the Invention

[0004] In view of this, the present invention provides a mid-mounted double-flow air conditioner, which can increase the defogging efficiency and reduce the air conditioner energy consumption in the double-flow heating mode, and has a small main space in the Y direction, providing a large space for the interior passenger compartment of the vehicle.

[0005] To achieve the above object, the technical solution of the present invention is as follows:

[0006] A mid-mounted double-flow air conditioner includes an air conditioner box housing assembly, and the key lies in that: the air conditioner box housing assembly has a middle partition and outer housings symmetrically installed on both sides of the middle partition. An air flow channel is formed between each of the two outer housings and the middle partition. Both of the two air flow channels are provided with an air inlet end and an air outlet end. The air outlet ends of the two air flow channels are both located at the top of the outer housing, and the air inlet ends are both located at the front side of the outer housing. A set of confluence housings are respectively installed at the positions corresponding to the air inlet ends of the two outer housings. Both of the two sets of confluence housings have an internal circulation air inlet and an external circulation air inlet. The internal circulation air inlets of the two sets of confluence housings respectively face both sides in the width direction of the air conditioner box housing assembly, and the external circulation air inlets of the two sets of confluence housings both face the front end of the air conditioner box housing assembly;

[0007] A damper is rotatably assembled in each of the two sets of confluence housings, and the damper can selectively close the internal circulation air inlet or the external circulation air inlet.

[0008] With the above structure, by controlling the rotation of the air dampers, the two air flow channels can respectively select different circulation modes, so as to simultaneously achieve the purpose of defrosting the windows and heating the driver and passengers. In addition, the two air flow channels are symmetrically arranged on both sides of the middle partition, and the two sets of external circulation air inlets are all oriented towards the front end of the air conditioner housing assembly. The air outlet ends of the two air flow channels are both located at the top of the outer housing. Through such a layout, the overall volume of the air conditioner housing assembly can be reduced, the occupied space of the air conditioner can be reduced, a large amount of space can be provided for the position of the driver's feet, and the driving comfort of users can be greatly improved.

[0009] Preferably: the tops of the two sets of air dampers are both provided with rotating shafts, and the rotating shafts all pass upward through the corresponding outer housings. Each of the two outer housings is equipped with an actuator, and each actuator is used for the independent rotation of the two sets of air dampers. With the above structure, various controls of the air conditioner gears can be realized.

[0010] Preferably: each air damper is of a fan-shaped structure, which has a fan-shaped vertical surface and fan-shaped end faces arranged on both sides of the fan-shaped vertical surface.

[0011] Preferably: the two sets of confluence housings are both connected by an upper confluence housing and a lower confluence housing. With the above structure, it is convenient for installation, and at the same time, the overall structural stability of the confluence housing can be enhanced.

[0012] Preferably: the front end of the air conditioner housing assembly is provided with an annular cover body extending forward, and the two sets of external circulation air inlets are both located in the annular cover body. With the above structure, it is convenient to assemble the air conditioner in the vehicle.

[0013] Preferably: a filter screen and a sealing component are successively arranged at the front end of the annular cover body. The sealing component is a ring-shaped structure with a hollow in the middle, and it is used to abut against the engine compartment bulkhead; the sealing component has elasticity. With the above structure, large-particle foreign matters in the engine compartment can be prevented from entering the interior of the air conditioner housing assembly through the annular cover body.

[0014] Preferably: sound insulation covers are installed at the positions of the two sets of confluence housings corresponding to the internal circulation air inlets. The upper sides of the sound insulation covers are all open, so that the air flow can be introduced into the corresponding internal circulation air inlets from bottom to top. With the above structure, the air inlet direction of the air flow can be changed, ensuring that the wind noise generated when the air flow enters the internal circulation air inlet does not face the direction of the driver and co-driver, achieving the purpose of active noise reduction.

[0015] Preferably: the sound insulation cover includes a support skeleton and sound insulation cotton covering the surface of the support skeleton, and openings are distributed on each support skeleton.

[0016] Preferably, each of the support skeletons includes a wind shield surface inclined outside its corresponding inner circulation air inlet. The lower ends of the wind shield surfaces are fixedly connected to the corresponding confluence housings respectively, and there are gaps between the upper ends and the corresponding inner circulation air inlets. First bending parts and second bending parts are respectively arranged on both sides of each wind shield surface, and the ends of the first bending parts and the second bending parts are fixedly assembled at both ends of the inner circulation air inlet respectively.

[0017] Preferably, the filter screen is composed of square grids distributed in an array, and the side length of each square grid is less than or equal to 6 mm. With the above structure, large particle foreign matters can be effectively prevented from entering the annular cover body.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. By using the in - center double - flow air conditioner provided by the present invention, through controlling the rotation of the air damper, the two air flow channels can respectively select different circulation modes, so as to simultaneously achieve the purposes of defrosting the vehicle window and heating the driver and passengers.

[0020] 2. By using the in - center double - flow air conditioner provided by the present invention, the heating efficiency of the air conditioner can be improved in the double - flow heating mode, and at the same time, the energy consumption of the air conditioner can be reduced.

[0021] 3. By using the in - center double - flow air conditioner provided by the present invention, the overall volume of the air conditioner housing assembly can be reduced, the occupied space of the air conditioner can be reduced, the layout of the vehicle interior space can be optimized, a large space can be provided for the foot position of the driver, and the driving comfort of the user can be greatly improved.

[0022] 4. Each actuator can independently control the rotation of its corresponding rotating shaft, and can realize various controls of the air conditioner gears, providing more gear selection for the driver and passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the in - center double - flow air conditioner;

[0024] Figure 2 is a schematic diagram showing the flow direction of the air flow in the air flow channel 21;

[0025] Figure 3 is a left view of the in - center double - flow air conditioner;

[0026] Figure 4 is a rear view of the in - center double - flow air conditioner;

[0027] Figure 5 is a schematic structural diagram showing the installation position of the air damper 4 (the upper confluence housing 31 has been hidden);

[0028] Figure 6It is a schematic structural diagram of the busbar housing 3;

[0029] Figure 7 It is a schematic structural diagram of the air damper 4;

[0030] Figure 8 It is another schematic structural diagram of the air damper 4 (the rubber coating 4d of the air damper has been hidden);

[0031] Figure 9 It is a schematic structural diagram of the rubber coating 4d of the air damper;

[0032] Figure 10 It is a plan view of the center-mounted double-flow air conditioner installed on the engine compartment bulkhead B;

[0033] Figure 11 It is an exploded schematic diagram showing the connection relationship of the annular cover 6, the filter screen 7, the sealing component 8 and the engine compartment bulkhead B;

[0034] Figure 12 It is a schematic structural diagram of the engine compartment bulkhead B;

[0035] Figure 13 It is a schematic structural diagram of the filter screen 7;

[0036] Figure 14 It is a schematic structural diagram of the annular cover 6;

[0037] Figure 15 It is a schematic structural diagram of the center-mounted double-flow air conditioner after installing the sound insulation cover 9 (only one side is shown);

[0038] Figure 16 It is another schematic structural diagram of the center-mounted double-flow air conditioner after installing the sound insulation cover 9 (only a part of one inner circulation air inlet 3a and the sound insulation cover 9 is shown);

[0039] Figure 17 It is an exploded structural schematic diagram showing the connection relationship between the busbar housing 3 and the sound insulation cover 9;

[0040] Figure 18 It is a schematic structural diagram of the sound insulation cover 9;

[0041] Figure 19 It is another schematic structural diagram of the sound insulation cover 9;

[0042] Figure 20 It is a schematic structural diagram of the support skeleton 91;

[0043] Figure 21 It is a schematic diagram showing the inner structure of the air damper 4. Detailed implementation manners

[0044] The present invention will be further described below in conjunction with embodiments and the drawings.

[0045] As Figure 1 and 2 shown, a center-mounted double-flow air conditioner includes an air conditioner housing assembly A. The air conditioner housing assembly A has a middle partition 1 and outer housings 2 symmetrically installed on both sides of the middle partition 1. An air flow channel 21 is formed between each of the two groups of outer housings 2 and the middle partition 1. Both of the two air flow channels 21 are provided with an air inlet end 2a and an air outlet end 2b. The air outlet ends 2b of the two air flow channels 21 are both located at the top of the outer housing 2, and the air inlet ends 2a are both located at the front side of the outer housing 2. Among them, the air inlet end 2a is an annular open end to facilitate the installation of a blower. Installing a blower in the air flow channel 21 of an automotive air conditioner is a mature technical means, which will not be elaborated here in detail. After the air enters the air inlet end 2a, under the action of the blower, it flows out from the air outlet end 2b along the Figure 2 shown flow direction, and circulates in this way.

[0046] Again, as Figure 3 and 4 shown, a set of confluence housings 3 is installed at the position corresponding to the air inlet end 2a of each of the two groups of outer housings 2. Both of the two groups of confluence housings 3 have an internal circulation air inlet 3a and an external circulation air inlet 3b. That is, for a single air flow channel 21, the external circulation gas and the internal circulation gas share one air inlet end 2a. As can be seen from Figure 1 , the internal circulation air inlets 3a of the two groups of confluence housings 3 are respectively oriented towards both sides in the width direction of the air conditioner housing assembly A, and the external circulation air inlets 3b of the two groups of confluence housings 3 are both oriented towards the front end of the air conditioner housing assembly A. Combining with Figure 5 and 6 can be seen that a damper 4 is rotatably assembled in each of the two groups of confluence housings 3. The damper 4 can close the internal circulation air inlet 3a or the external circulation air inlet 3b in an alternative manner. When the damper 4 rotates to the internal circulation air inlet 3a, the air introduced into this air flow channel 21 is the external gas of the vehicle. When the damper 4 rotates to the external circulation air inlet 3b, the air introduced into this air flow channel 21 is the internal gas of the vehicle.

[0047] Based on the above structural design, the center-mounted double-flow air conditioner provided in this embodiment has two air flow channels 21. By controlling the rotation of the damper 4, the two air flow channels 21 can respectively select different circulation modes. For example, if one air flow channel 21 selects the internal circulation mode to provide warmth for the occupants' bodies, and the other air flow channel 21 selects the external circulation mode to provide cold air for the window, such a setting can simultaneously achieve the purpose of defrosting the window and heating the occupants.

[0048] In addition, the automotive air conditioner provided in this embodiment has a central double - flow structure. Two air flow channels 21 are symmetrically arranged on both sides of the middle partition 1. The outer - circulation air inlets 3b and the inner - circulation air inlets 3a of the two air flow channels 21 are integrated at the front of the air - conditioner housing assembly by a confluence housing 3. Among them, the two outer - circulation air inlets 3b are both oriented towards the front end of the air - conditioner housing assembly, and the two inner - circulation air inlets 3a are arranged on the side part of the front end of the housing assembly. At the same time, the air - outlet ends 2b of the two air flow channels 21 are both located at the top of the outer housing 2. By integrating the two air flow channels 21 in such a layout, the overall volume of the air - conditioner housing assembly can be reduced, the occupied space of the air - conditioner can be shrunk, especially the proportion of the main space in the Y - direction inside the vehicle is reduced, providing a large space for the driver's foot position and greatly improving the driving comfort of users.

[0049] Since the structures of the left and right parts of the air - conditioner housing assembly A in the width direction are the same, only the structure of one side will be described in detail below.

[0050] As Figure 5 、 6 As shown in Figures 6 and 7, both ends of the air damper 4 are provided with rotating shafts 4a. The rotating shaft 4a at its top passes through the upper part of the confluence housing 3 and extends upward. An actuator capable of driving its rotation is provided at the top of the rotating shaft 4a. In this embodiment, the two actuators can independently control the rotation of their corresponding rotating shafts 4a. Designed in this way, various controls of the air - conditioner gears can be realized. For example, both air flow channels 21 introduce outer - circulation gas or both introduce inner - circulation gas, or the two air flow channels 21 introduce different gases, etc. In the double - flow heating mode, the air - conditioner can not only improve the temperature - regulation efficiency but also reduce the energy consumption of the air - conditioner compared with the single - circulation flow - channel structure of traditional automotive air - conditioners.

[0051] Please refer to Figure 7 , the air dampers 4 are all in a fan - shaped structure, and their structural sizes match the sizes of the inner - circulation air inlets 3a and the outer - circulation air inlets 3b. The air damper 4 includes a fan - shaped vertical surface 4b and fan - shaped end surfaces 4c arranged on both sides of the fan - shaped vertical surface 4b. As can be seen from Figure 21 , the fan - shaped vertical surface 4b and the fan - shaped end surfaces 4c on both sides of it enclose a concave arc - shaped structure inside the air damper 4. Designed in this way, while ensuring the structural strength, it has a good ventilation effect. Referring again to Figure 7 , the fan - shaped vertical surface 4b is wavy. The wavy fan - shaped vertical surface 4b can increase the overall structural strength of the air damper 4 and improve the stability of the air damper 4 in the stationary state.

[0052] As Figures 7 - 9As shown, a connecting edge 4e is provided at the edge of the air damper 4, and an air damper rubber coating 4d is provided on the side wall of the connecting edge 4e. The air damper rubber coating 4d wraps the inner and outer sides of the connecting edge 4e, enhancing the sealing effect of the air damper 4. In this embodiment, the air damper rubber coating 4d is formed by secondary injection molding.

[0053] Please refer Figure 6 , the confluence housing 3 is composed of an upper confluence housing 31 and a lower confluence housing 32, and the upper confluence housing 31 and the lower confluence housing 32 are fixedly connected by screws. Considering this way, it not only has the advantage of convenient installation, but also enhances the structural stability of the confluence housing 3.

[0054] As Figure 10 and 11 shown, in practical applications, the air-conditioning box housing assembly A is fixedly assembled in the vehicle through the engine compartment bulkhead B. For the convenience of assembly, a circular cover 6 extending forward is provided at the front end of the air-conditioning box housing assembly A, and the circular cover 6 can surround two sets of external circulation air inlets 3b. An air passing opening B1 facing the circular cover 6 is provided on the engine compartment bulkhead B. A circular flange 6a surrounding the circumference of the circular cover 6 is provided, and a filter screen 7 and a sealing member 8 are sequentially arranged between the circular flange 6a and the engine compartment bulkhead B. Among them, the sealing member 8 is a circular member with a hollow in the middle, and the shape and structure of the sealing member 8 match that of the circular flange 6a. Designed in this way, the filter screen 7 can be exposed to the air passing opening B1. The sealing member 8 has elasticity. After the air-conditioning box housing assembly A is fixedly assembled in the vehicle, the elastic deformation tendency of the sealing member 8 can force the filter screen 7 to be stably held between the engine compartment bulkhead B and the circular flange 6a, having the advantages of convenient and reliable installation of the filter screen 7. Based on this, the filter screen 7 facing the air passing opening B1 of the engine compartment bulkhead B can prevent large-particle foreign matters in the engine compartment from entering the interior of the air-conditioning box housing assembly A through the circular cover 6, eliminating the noise generated by foreign matters falling into the air-conditioning duct, which has a positive effect on ensuring the normal operation of the air conditioner.

[0055] Adopting the above assembly method, after the air-conditioning box housing assembly A is fixedly assembled in the vehicle, there is no need to add other complex fixing components. Only relying on the elasticity of the sealing member 8 can lock the filter screen 7 between the engine compartment bulkhead B and the circular flange 6a, having the advantages of simple structure and convenient installation.

[0056] In this embodiment, the sealing member 8 is made of foam, having the advantages of good elasticity, heat resistance to pressing and not easy to fall off, and can be permanently fixed between the engine compartment bulkhead B and the above-mentioned circular flange 6a. In addition, the foam can also absorb part of the wind noise brought by the airflow entering the circular cover 6, further enhancing the riding experience of the passengers.

[0057] Further, please refer Figure 13 and 14, bending structures 7a are provided on both sides of the filter screen 7, positioning grooves 6a1 are provided on both sides of the annular flanging 6a, and the length of the positioning groove 6a1 matches the length of the bending structure 7a. When installing the filter screen 7 and the sealing member 8, first position and install the bending structures 7a one by one in the positioning grooves 6a1. When subsequently fixing the sealing member 8 and the filter screen 7, it can prevent the filter screen 7 from shifting, thereby ensuring that the filter screen 7 always fully covers the annular cover 6.

[0058] In this embodiment, the filter screen 7 is a metal grid or a plastic grid. As Figure 13 shown, the filter screen 7 is composed of square grids 3b distributed in an array, and the side length of each square grid 3b is less than or equal to 6 mm. With such a design, it can effectively prevent large particle foreign objects from entering the annular cover 6, further ensuring the normal operation of the automotive air conditioner.

[0059] Please refer to Figure 12 , the engine compartment bulkhead B has a planar area B2 corresponding to the position of the air intake B1. Combining Figure 11 and 14 it can be seen that the structure surrounded by the planar area B2, the structure of the sealing member 8, and the structure of the annular flanging 6a are all rectangular annular structures. When the air conditioner housing assembly A is fixedly assembled on the engine compartment bulkhead B, the sealing member 8 can abut against the planar area B2. At this time, the elastic deformation tendency of the sealing member 8 can force the filter screen 7 to be more stably held between the engine compartment bulkhead B and the annular flanging 6a.

[0060] Since the automotive air conditioner provided in this embodiment is a center-mounted air conditioner, the two sets of internal circulation air inlets 3a are respectively oriented towards the driver and passenger sides. When the air conditioner operates, the wind noise generated by the airflow entering the internal circulation air inlets 3a will be directly transmitted to the driver and passenger sides, affecting the riding experience of the occupants. Therefore, in order to reduce noise, please refer to Figure 15 , sound insulation covers 9 are installed at the positions of the confluence housing 3 corresponding to the internal circulation air inlets 3a. The upper side of the sound insulation cover 9 is open, enabling the internal circulation air flow to be introduced into the corresponding internal circulation air inlets 3a from bottom to top. Based on this, when the air conditioner operates, the internal gas can enter the internal circulation air inlets 3a from top to bottom, changing the air inlet direction of the airflow in the traditional air inlet structure, ensuring that the wind noise generated by the airflow entering the internal circulation air inlets 3a does not face the driver and passenger sides, achieving the purpose of active noise reduction. At the same time, the sound insulation cover 9 itself can also absorb the noise generated when the airflow enters the internal circulation air inlets 3a from top to bottom, further attenuating the wind noise transmitted from the position of the internal circulation air inlets 3a to the cab direction, improving the NVH performance of the automotive air conditioner, and thus enhancing the comfort of the occupants during driving.

[0061] Furthermore, combining Figure 17 and 18It can be seen that the sound insulation cover 9 includes a support skeleton 91 and a sound insulation cotton 92 covering the surface of the support skeleton 91. Openings 911 are distributed on the support skeleton 91. In this embodiment, the sound insulation cotton 92 covers the outer surface of the support skeleton 91. With such a design, the sound insulation cotton 92 can not only absorb the noise brought by the airflow entering the inner circulation air inlet 3a from the outer direction of the sound insulation cover 9, but also attenuate the noise brought by the airflow entering the inner circulation air inlet 3a from the inner direction of the sound insulation cover 9, and the noise reduction effect is good.

[0062] Please refer Figure 20 , the support skeleton 91 includes a windward surface 9a inclinedly arranged outside the inner circulation air inlet 3a. Combining Figure 15 it can be seen that the lower end of the windward surface 9a is fixedly connected to the confluence housing 3, and there is a gap between the upper end and the inner circulation air inlet 3a. First bending parts 9b and second bending parts 9c are respectively arranged on both sides of the windward surface 9a, and the end parts of the first bending part 9b and the second bending part 9c are respectively fixedly assembled at both ends of the inner circulation air inlet 3a. The inclined windward surface 9a can play a role in facing the wind, avoiding the perpendicular collision of the airflow with the corresponding plate body, thereby further optimizing the noise at the air inlet position. Refer again Figure 19 , in this embodiment, the sound insulation cotton 92 matches the surface structure outside the support skeleton 91. When the automotive air conditioner operates, the airflow in the inner circulation can only enter the inner circulation air inlet 3a from the upper side direction of the inner circulation air inlet 3a from top to bottom, further ensuring that the wind noise generated when the airflow enters the inner circulation air inlet 3a does not face the direction of the driver and front passenger.

[0063] Refer again Figure 20 , for convenient assembly, the upper end of the first bending part 9b is provided with a first ear 9b1 extending outwards. Combining Figure 16 and 17 it can be seen that a support 3c is provided at the position of the lower confluence housing 32 below the first ear 9b1. The support 3c has a first internal threaded hole b, and the first ear 9b1 is fixedly connected to the support 3c by a screw, ensuring that the first bending part 9b can be stably fixed on the confluence housing 3.

[0064] As Figure 19 and 20 shown, the upper end of the second bending part 9c is provided with a second ear 9c1, and a connecting column 9c2 is fixedly arranged at the lower end of the second ear 9c1. The connecting column 9c2 has a second internal threaded hole d. Refer again Figure 15 and 17 , a support platform 3d abuting against the upper surface of the second ear 9c1 is provided on the upper confluence housing 31. The screw is inserted into the second internal threaded hole d from the support platform 3d, enabling the second ear 9c1 to be fixedly connected to the support platform 3d.

[0065] Refer again Figure 17, a fixing frame 3d1 perpendicular to and extending downward is provided at the outer end of the support platform 3d. A central through hole c is provided in the middle of the fixing frame 3d1. Combining Figure 15 and 19 , it can be seen that a protruding tongue 9c3 is provided on the side of the connecting column 9c2 facing the central through hole c. The tongue 9c3 is used to support on the fixing frame 3d1. In this embodiment, the number of tongues 9c3 is two groups. When installing the sound insulation cover 9, the tongue 9c3 supporting on the fixing frame 3d1 can play a role of pre-positioning to ensure that the sound insulation cover 9 can be installed smoothly, having the advantage of convenient installation.

[0066] Please refer to Figure 17 and 18 , a second connecting column 9d is provided at the bottom end of the support frame 91. A connecting plate 3e is provided on the lower busbar housing 32 and abuts against the upper surface of the second connecting column 9d. The connecting plate 3e is fixedly assembled on the second connecting column 9d by screws. Designed in this way, the connection strength between the support frame 91 and the busbar housing 3 can be enhanced, making the connection between the support frame 91 and the busbar housing 3 more stable. In addition, the second connecting column 9d can hide the threaded section of the screw, prevent the threaded section from being exposed outside, avoid scratches on the operator during the installation of the support frame 91, and at the same time improve the aesthetics of the equipment parts.

[0067] For another example Figure 17 , 18 and as shown in 19, the sound insulation cotton 92 is fixed on the surface of the support frame 91 by a number of press studs 11. In this embodiment, the number of press studs 11 is at least three groups to ensure that the sound insulation cotton 92 can stably cover the surface of the support frame 91, thus ensuring the noise reduction effect of the entire sound absorption structure.

[0068] Finally, it should be noted that the above description is only the preferred embodiment of the present invention. Under the inspiration of the present invention, those of ordinary skill in the art can make various similar representations without violating the purpose and claims of the present invention. Such transformations all fall within the protection scope of the present invention.

Claims

1. A central double-flow air conditioner, comprising an air conditioner box housing assembly, characterized in that: The air conditioner casing assembly has a middle partition (1) and outer casings (2) symmetrically installed on both sides of the middle partition (1). An air flow channel (21) is formed between each of the two groups of outer casings (2) and the middle partition (1). Both of the two air flow channels (21) are provided with an air inlet end (2a) and an air outlet end (2b). The air outlet ends (2b) of the two air flow channels (21) are both located at the top of the outer casing (2), and the air inlet ends (2a) are both located at the front side part of the outer casing (2). A set of confluence casings (3) is installed at the position corresponding to the air inlet end (2a) of each of the two groups of outer casings (2). Both of the two groups of confluence casings (3) have an inner circulation air inlet (3a) and an outer circulation air inlet (3b). The inner circulation air inlets (3a) of the two groups of confluence casings (3) respectively face both sides in the width direction of the air conditioner casing assembly, and the outer circulation air inlets (3b) of the two groups of confluence casings (3) both face the front end of the air conditioner casing assembly; A damper (4) is rotatably assembled in each of the two groups of confluence casings (3), and the damper (4) can selectively close the inner circulation air inlet (3a) or the outer circulation air inlet (3b); The top ends of the two groups of dampers (4) are both provided with a rotating shaft (4a), and the rotating shafts (4a) both penetrate upward through the corresponding outer casing (2). An actuator is arranged on each of the two groups of outer casings (2), and each actuator is used for the independent rotation of the two groups of dampers (4); Sound insulation covers (9) are installed at the positions corresponding to the inner circulation air inlets (3a) of the two groups of confluence casings (3). The upper sides of the sound insulation covers (9) are all open, so that air flow can be introduced into the corresponding inner circulation air inlet (3a) from bottom to top; The sound insulation cover (9) includes a support skeleton (91) and sound insulation cotton (92) covering the surface of the support skeleton (91). Openings (911) are distributed on each of the support skeletons (91); Each support skeleton (91) includes a wind blocking surface (9a) obliquely arranged outside the corresponding inner circulation air inlet (3a). The lower ends of the wind blocking surfaces (9a) are all fixedly connected to the corresponding confluence casing (3), and there is a gap between the upper ends and the corresponding inner circulation air inlet (3a). First bending parts (9b) and second bending parts (9c) are respectively arranged on both sides of each of the wind blocking surfaces (9a), and the end parts of the first bending parts (9b) and the second bending parts (9c) are respectively fixedly assembled at both ends of the inner circulation air inlet (3a).

2. The central double-flow air conditioner according to claim 1, wherein: Each of the dampers (4) is of a sector structure, which has a sector vertical surface (4b) and sector end surfaces (4c) arranged on both sides of the sector vertical surface (4b).

3. The central double-flow air conditioner according to claim 1, characterized in that: Both of the two groups of confluence casings (3) are formed by connecting an upper confluence casing (31) and a lower confluence casing (32).

4. The central double-flow air conditioner according to claim 1, characterized in that: A circular cover body (6) extending forward is provided at the front end of the air conditioner casing assembly, and both of the two groups of outer circulation air inlets (3b) are located inside the circular cover body (6).

5. The central double-flow air conditioner according to claim 4, wherein: A filter screen (7) and a sealing member (8) are successively provided at the front end of the annular cover body (6). The sealing member (8) is a ring-shaped structure with a hollow middle, and is used for abutting against the engine compartment bulkhead; the sealing member (8) has elasticity.

6. The central double-flow air conditioner according to claim 5, characterized in that: The filter screen (7) is composed of square meshes (7b) distributed in an array, and the side length of each square mesh (7b) is less than or equal to 6 mm.

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