Double-layer flow air conditioner with three-air-door air inlet box structure

Abstract

According to the double-layer flow air conditioner with the three-air-door air inlet box structure, on the basis of an existing air inlet shell structure, air doors on the two sides of the air inlet box structure are rotationally connected with an air inlet shell through a first rotating shaft and a sleeve respectively, and the structural strength and the rotating stability of the air doors on the two sides can be effectively improved; the problem of air inlet squeal caused by untight closing of the air door due to limitation of structural strength can be avoided; the sleeve is rotationally arranged on the second rotating shaft in a sleeving mode, coaxial arrangement of the three air doors is achieved, the air inlet box structure can be further narrowed into the space needed by rotation of the air doors, and therefore the overall size is narrowed; through the transmission shaft, the air doors on the two sides still rotate synchronously while keeping the structures independent, the air doors on the two sides can still share an actuator, and cost increase can be avoided; therefore, the air inlet box structure can effectively solve the problem that an existing air inlet box structure is large in size due to the fact that the air door is difficult to be coaxial, and is favorable for reducing the size of the air inlet box structure and improving the running stability of an automobile double-layer flow air conditioner.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of automobile air conditioner, concretely relates to a double -deck flow air conditioner of three damper air inlet box structure. BACKGROUND

[0002] The automobile double -deck flow air conditioner is the automobile air conditioner scheme that makes the airflow stratification, realizes the independent control of the airflow in and out of the car, can introduce the return air in the car and the fresh air outside the car into the lower layer and the upper layer area of the cabin respectively, makes the airflow in and out of the car be more efficient, thereby improves the comfort and energy -saving effect of the automobile air conditioner. The automobile double -deck flow air conditioner makes the airflow stratification mainly rely on the air inlet box assembly to realize, the air inlet box assembly includes the air inlet box structure and the volute structure, the air box structure is connected on the upper portion of the volute structure, the lower portion of the volute structure is connected with the air blower, the air box structure has the return air inlet and the fresh air inlet on the upper portion, the volute structure has the upper layer air outlet and the lower layer air outlet, the air box structure and the volute structure cooperate in the inside and form the upper layer air duct and the lower layer air duct that are independent of each other, one end of the upper layer air duct and the lower layer air duct is communicated with the upper layer air outlet and the lower layer air outlet one by one, the other end is respectively equipped with the air door and can rotate and switch and be communicated with the return air inlet and the fresh air inlet, the impeller of the air blower is located in the volute structure and acts on the upper layer air duct and the lower layer air duct respectively;When the upper layer air duct is communicated with the fresh air inlet, the impeller imports the fresh air outside the car with lower temperature to the upper layer area of the cabin through the upper layer air outlet, thereby realizes the defrosting, defogging function, when the lower layer air duct is communicated with the return air inlet, the impeller imports the return air in the car with higher temperature to the lower layer area of the cabin through the lower layer air outlet, thereby realizes the heating function in the car.

[0003] Chinese patent CN108407572B discloses a kind of inside and outside air double -deck flow automobile air conditioner air inlet box assembly, the background art and attached Figure 1 It is introduced that the return air inlet and the fresh air inlet of the traditional air inlet box assembly are vertically spaced to avoid rotating interference, which leads to the size of the air inlet box structure being larger. To separate the upper layer air duct and the lower layer air duct at the impeller, a partition is horizontally arranged in the axial range of the impeller, and the impeller is lifted by a plurality of vertical columns between the lower layer impeller and the bottom of the volute to form a flow passage for the lower layer air duct to connect the lower layer air outlet, which leads to the size of the volute structure being larger. Figure 9 As shown in the attached Figure 3 , a partition in the shape of an inverted funnel is arranged inside the annular impeller, which separates the upper layer air duct and the lower layer air duct inside the impeller. Correspondingly, as shown in the attached Figure 7The adapter air duct shown in the figure is in a vertical funnel shape, and the lower air duct is formed by the communication of the partition plate and the air inlet channels on both sides, and the upper air duct is formed by the communication of the air inlet channels on both sides and the outside of the partition plate, which makes the size of the air inlet box structure and the volute structure be reduced; but as shown in the patent specification attached Figure 5 As shown in the figure, the dampers of the air inlet channels on both sides are connected to the actuators through a long shaft, and the structural strength is poor, and the problem of air inlet howling caused by the air inlet channels on both sides not being closed tightly is prone to occur, in addition, in order to avoid rotation interference, the dampers of the air inlet channels on both sides are not coaxial with the damper of the middle air inlet channel, and the space required for the damper of the air inlet box structure to rotate is large, which leads to the size of the air inlet box structure being still large. Chinese patent CN108248338A discloses a circulating damper assembly and a double-layer flow inside and outside circulating air conditioner box, and the scheme is that three dampers share a long shaft, and the long shaft drives each damper to rotate through the stop blocks thereon, and although the scheme can further reduce the size of the air inlet box structure, the problem of poor structural strength caused by the long shaft still exists. SUMMARY

[0004] In view of the above problems of the prior art, the purpose of the present application is to provide a double-layer flow air conditioner with a three-damper air inlet box structure, which solves the technical problem that the size of the existing air inlet box structure is large due to the coaxial difficulty of the dampers, and achieves the effects of reducing the size of the air inlet box structure and improving the operation stability.

[0005] To solve the above technical problems, the present application adopts the following technical scheme:

[0006] The application discloses a double-layer flow air conditioner with a three-damper air inlet box structure, which comprises an air inlet box structure, wherein the air inlet box structure comprises an air inlet shell, the upper portion of the air inlet shell is provided with a fresh air inlet and a return air inlet, the air inlet shell is internally provided with an air inlet cavity which is open at the lower portion and is communicated with the fresh air inlet and the return air inlet respectively, the air inlet shell is internally provided with two vertical air inlet partitions, and the air inlet cavity is divided into a first air inlet channel, a second air inlet channel and a third air inlet channel which are arranged in sequence in the horizontal direction and are independent of each other, a rotatable first air door, a second air door and a third air door are respectively arranged in each air inlet channel, and the rotation of each air door can switch the corresponding air inlet channel to be communicated with the fresh air inlet and the return air inlet respectively; the first air door is rotationally connected with the air inlet shell through a horizontally arranged first rotating shaft, the second air door is rotationally connected with the air inlet shell through a second rotating shaft, the second rotating shaft is coaxial with the first rotating shaft, the third air door is rotationally connected with the air inlet shell through a sleeve which is coaxially rotationally arranged outside the second rotating shaft; one end of the second rotating shaft which is away from the first air door rotationally extends out of the air inlet shell and is connected with an actuator, so as to drive the second air door to rotate; the second air inlet channel is provided with a transmission shaft which is parallel to the second rotating shaft and is spaced apart from the second rotating shaft outside the rotation range of the second air door, both ends of the transmission shaft are rotationally penetrated through the two air inlet partitions and are coaxially fixedly connected with first transmission gears, second transmission gears are coaxially fixedly arranged on the first rotating shaft and the sleeve respectively, the second transmission gears are engaged with the first transmission gears in the air inlet channel, and one end of the sleeve which is away from the second air door rotationally extends out of the air inlet shell and is connected with an actuator, so as to drive the first air door and the third air door to rotate.

[0007] Further, the sleeve is gap-fitted with the second rotating shaft, and the second rotating shaft is rotationally fitted with the shaft holes of the two air inlet partitions.

[0008] Further, the double-layer flow air conditioner further comprises a volute structure, wherein the volute structure comprises a volute shell, the volute shell is internally provided with an air outlet cavity which is open at the upper portion and is formed with an air outlet at the side face, the upper portion of the volute shell is connected with the lower portion of the air inlet shell and the air outlet cavity is communicated with the air inlet cavity, a horizontal air outlet partition is arranged in the air outlet cavity, the air outlet partition divides the air outlet cavity into an upper layer and a lower layer, and divides the air outlet into an upper air outlet and a lower air outlet correspondingly; a blower fan is connected with the lower portion of the volute shell, the impeller of the blower fan is in a cylindrical shape and comprises two parallel and opposite annular connecting plates and a plurality of blades which are connected between the two annular connecting plates and are uniformly distributed in the circumferential direction, the impeller is arranged in the vertical direction in the air outlet cavity and extends above the air outlet partition through a clearance hole in the middle portion of the air outlet partition; a partition sleeve is arranged in the vertical direction on the inner side of the impeller, the two ends of the partition sleeve are both provided with taper flares, the taper flare at the upper end is matched with the two air inlet partitions, so that the inner side of the partition sleeve is communicated with the second air inlet channel and the outer side is communicated with the first air inlet channel and the third air inlet channel, and the taper flare at the lower end is located above the air outlet partition and extends in the circumferential direction to be close to the air outlet partition, so that the inner side of the partition sleeve is communicated with the lower layer of the air outlet cavity through the gaps between the blades and the outer side is communicated with the upper layer of the air outlet cavity through the gaps between the blades.

[0009] Further, the double-layer flow air conditioner further comprises a distribution box structure, the distribution box structure comprising a distribution shell, the distribution shell being provided with an upper inlet, a lower inlet, a defrosting inlet, a front-row face blowing inlet, a front-row foot blowing inlet, a rear-row face blowing inlet and a rear-row foot blowing inlet, the distribution shell being connected with the volute shell and the upper inlet being in communication with the upper outlet and the lower inlet being in communication with the lower outlet; the distribution shell being divided into an upper outlet channel and a lower outlet channel, the upper outlet channel being in communication with the upper inlet, the defrosting inlet, the front-row face blowing inlet and the rear-row face blowing inlet, and the lower outlet channel being in communication with the lower inlet, the front-row foot blowing inlet and the rear-row foot blowing inlet; the distribution shell being provided with an evaporator core and a heating core, the evaporator core being capable of dehumidifying and cooling airflows in the upper outlet channel and the lower outlet channel, and the heating core being capable of heating airflows in the upper outlet channel and the lower outlet channel.

[0010] Further, the second rotating shaft and the sleeve share an actuator, and the actuator drives the second rotating shaft and the sleeve to rotate alternately.

[0011] Further, the second rotating shaft and the sleeve share an actuator, and the output rotating shaft of the actuator is transversely arranged and is provided with a driving disc vertically connected thereto, one side of the driving disc facing the air inlet shell being provided with a first guide groove and a second guide groove; the first guide groove comprises a first circular arc segment and a first guide segment, the first circular arc segment being concentric with the driving disc, one end of the first guide segment being in communication with one end of the first circular arc segment, and the other end of the first guide segment extending close to the center of the driving disc; the second guide groove comprises a second circular arc segment and a second guide segment, the second circular arc segment being concentric with the driving disc, one end of the second guide segment being in communication with one end of the second circular arc segment, and the other end of the second guide segment extending away from the center of the driving disc; the central angle of the first circular arc segment is equal to the central angle corresponding to the second guide segment, and the central angle corresponding to the first guide segment is equal to the central angle of the second circular arc segment; under the same rotation direction of the driving disc, the first circular arc segment is located in front of the first guide segment, and the second circular arc segment is located behind the second guide segment.

[0012] The end of the sleeve away from the second air door extends out of the air inlet shell and has external teeth, the air inlet shell is rotationally provided with a driving gear meshing with the external teeth, the driving gear has a first rocker plate extending radially, the side of the first rocker plate away from the air inlet shell is formed with a first guide column protruding along the transverse direction, the first guide column extends into a first guide slot, and the diameter of the first guide column matches the width of the first guide slot; the end of the second rotating shaft extending out of the air inlet shell is perpendicularly connected with a second rocker plate, the external teeth are located between the air inlet shell and the second rocker plate, the side of the second rocker plate away from the air inlet shell is formed with a second guide column protruding along the transverse direction, the second guide column extends into a second guide slot, and the diameter of the second guide column matches the width of the second guide slot; when the second air door and the third air door make the corresponding air inlet passages communicate with the fresh air inlet, the second guide column is located at the end of the second guide segment extending away from the center of the driving disc, and the first guide column is located at the end of the first circular arc segment away from the first guide segment.

[0013] Further, the end of the sleeve away from the second air door is synchronously rotationally connected with an external tooth sleeve, the end of the sleeve away from the second air door rotationally extends out of the air inlet shell through the external tooth sleeve, the external tooth sleeve is coaxially rotationally sleeved on the second rotating shaft and gap-fitted, and the external tooth sleeve forms the external teeth outside the air inlet shell.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1、 compared with the prior art, the utility model has the following beneficial effects:

[0016] 2、 the utility model discloses that the transmission shaft parallel to the second rotating shaft is arranged in the air inlet cavity, the first transmission gear at the both ends of the transmission shaft is respectively meshed with the second transmission gear on the first rotating shaft and the sleeve, so that the first air door and the third air door are kept synchronous rotation while keeping the structure independent, so that the first air door and the third air door can still be synchronously driven by an actuator, and it is not necessary to arrange the actuators respectively, thereby avoiding cost increase.

[0017] 3、The utility model discloses a sleeve extends one side of the air inlet shell is provided with the actuator, and designs the actuator through the driving disc respectively with the second swing arm plate of second pivot rotation can drive, and the first swing arm plate transmission connection that can drive sleeve rotation, and cooperate the first guide groove and the second guide groove on the driving disc, realize with one actuator asynchronous drive two sides air door and middle air door, can ensure that the function of through three air door switching air inlet box assembly air -out mode is not limited under the premise, further reduce cost. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The structure perspective drawing of double -deck flow air conditioner for example is described;

[0019] Figure 2 The structure perspective drawing of air inlet box for example is described;

[0020] Figure 3 The bottom view of air inlet box structure for example is described;

[0021] Figure 4 For along Figure 3 The cross section schematic drawing of A-A in middle;

[0022] Figure 5 The perspective drawing of each air door and actuator connection for example in;

[0023] Figure 6 For Figure 5 The perspective drawing of first air door, transmission shaft and actuator is hidden;

[0024] Figure 7 For Figure 6 The perspective drawing of driving disc is hidden;

[0025] Figure 8 The structure perspective drawing of volute for example is described;

[0026] Figure 9 The cross section schematic drawing of air inlet box assembly for example is described;

[0027] Figure 10 The structure perspective drawing of distribution box for example is described;

[0028] The components include: air inlet housing 1, fresh air inlet 2, return air inlet 3, air inlet baffle 4, first air inlet channel 5, second air inlet channel 6, third air inlet channel 7, first damper 8, second damper 9, third damper 10, first rotating shaft 11, second rotating shaft 12, sleeve 13, connecting rod 14, reinforcing rod 15, actuator 16, transmission shaft 17, first transmission gear 18, second transmission gear 19, drive disc 20, first guide groove 21, second guide groove 22, first arc segment 23, first guide segment 24, second arc segment 25, second guide... Section 26, drive gear 27, first rocker arm plate 28, first guide post 29, second rocker arm plate 30, second guide post 31, outer gear sleeve 32; volute housing 33, filter element 34, air outlet baffle 35, upper air outlet 36, lower air outlet 37, blower 38, impeller 39, separator sleeve 40, lower air outlet cavity 41, upper air outlet cavity 42; distribution housing 43, upper air inlet 44, lower air inlet 45, defrost air outlet 46, front row face air outlet 47, front row foot air outlet 48, rear row face air outlet 49, rear row foot air outlet 50. Detailed Implementation

[0029] 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.

[0030] Example:

[0031] Please see Figure 1 , Figure 2 and Figure 3 A dual-layer flow air conditioner with a three-door air inlet box structure includes an air inlet box structure. The air inlet box structure includes an air inlet housing 1. The upper part of the air inlet housing 1 has a fresh air inlet 2 and a return air inlet 3. The air inlet housing 1 has an air inlet cavity with an opening at the bottom and the upper part communicating with the fresh air inlet 2 and the return air inlet 3 respectively. The air inlet housing 1 has two vertical air inlet baffles 4 in the air inlet cavity, which divide the air inlet cavity into a first air inlet channel 5, a second air inlet channel 6 and a third air inlet channel 7 arranged horizontally and independently. Each air inlet channel is respectively provided with a rotatable first air door 8, a second air door 9 and a third air door 10. Each air door can be rotated to switch the corresponding air inlet channel to communicate with the fresh air inlet 2 and the return air inlet 3 respectively.

[0032] The first air door 8 is rotationally connected with the air inlet shell 1 through a first rotation shaft 11 arranged transversely, the second air door 9 is rotationally connected with the air inlet shell 1 through a second rotation shaft 12, the second rotation shaft 12 is coaxial with the first rotation shaft 11, the third air door 10 is rotationally connected with the air inlet shell 1 through a sleeve 13 coaxially sleeved outside the second rotation shaft 12; specifically, one end of the first rotation shaft 11 away from the second air door 9 is rotationally matched with a shaft hole on the side wall of the air inlet shell 1, the other end is rotationally matched with a shaft hole on the air inlet partition plate 4, one end of the second rotation shaft 12 away from the third air door 10 is rotationally matched with a shaft hole on the air inlet partition plate 4, the other end passes through a shaft hole on the air inlet partition plate 4 and is rotationally matched, one end of the sleeve away from the second air door 9 is rotationally matched with a shaft hole on the side wall of the air inlet shell 1, the other end is rotationally matched with a shaft hole on the air inlet partition plate 4; in the embodiment, the first air door 8, the second air door 9 and the third air door 10 are all integrally formed plastic parts; since the axial span of the first air door 8 and the third air door 10 is small, in order to reduce the weight and the influence on the airflow, the shaft segment of the first rotation shaft 11 inside the first air door 8 and the sleeve segment of the sleeve 13 inside the third air door 10 are cut off; since the axial span of the second air door 9 is relatively large, the shaft segment of the second rotation shaft 12 inside the second air door 9 is replaced by a relatively thin connecting rod 14, and a reinforcing rod 15 is vertically connected between the middle of the connecting rod 14 and the inner wall of the second air door 9, so as to reduce the weight and the influence on the airflow while ensuring the structural strength of the second air door 9;

[0033] One end of the second rotation shaft 12 away from the first air door 8 rotationally extends out of the air inlet shell 1 and is connected with an actuator 16, so as to drive the second air door 9 to rotate; a transmission shaft 17 parallel and spaced apart from the second rotation shaft 12 is arranged in the second air inlet channel 6 outside the rotation range of the second air door 9, both ends of the transmission shaft 17 rotationally pass through two air inlet partition plates 4 and are coaxially fixedly connected with first transmission gears 18, second transmission gears 19 are coaxially fixedly arranged on the first rotation shaft 11 and the sleeve 13, the second transmission gears 19 are engaged with the first transmission gears 18 in the air inlet channel, one end of the sleeve 13 away from the second air door 9 rotationally extends out of the air inlet shell 1 and is connected with an actuator 16, so as to drive the first air door 8 and the third air door 10 to rotate; the actuator 16 is a relatively mature product in the automobile air conditioner, which may include a controller and a motor as a driving source, and may also include a speed reduction assembly for improving torque.

[0034] The utility model discloses a double -deck flow air conditioner of three damper air intake box structure, compared with the both sides damper of existing air intake box structure is connected through long axle and is rotatably connected with air intake casing 1, the utility model discloses a double -deck flow air conditioner's air intake box structure, on the basis of the structure of existing air intake casing 1, first damper 8 and third damper 10 located at both sides are rotatably connected with air intake casing 1 independently with first rotation axis 11 and sleeve 13 respectively, can effectively improve the stability and structural strength of both sides damper and air intake casing 1 rotatable connection, can effectively avoid the problem that damper is closed not strictly because of being limited by structural strength, and further cause the air intake howl, further, based on the structure form that each damper is rotatably connected with air intake casing 1 independently, the utility model sets up the first rotation axis 11 of first damper 8 of one side and the second rotation axis 12 of second damper 9 in the middle coaxially, and the sleeve 13 of third damper 10 of the other side is rotatably set on the second rotation axis 12, realizes that three damper coaxial rotation sets up in air intake casing 1, is favorable for further reducing the space that air intake box structure is for damper rotation needs to, thereby reduces the overall size of air intake box structure, still further, the utility model sets up transmission shaft 17 that is parallel and interval with second rotation axis 12 in air intake cavity, and first transmission gear 18 on both ends of transmission shaft 17 is engaged with second transmission gear 19 on first rotation axis 11 and sleeve 13 respectively, makes first damper 8 and third damper 10 still keep synchronous rotation while keeping the structure independent, thereby still can make first damper 8 and third damper 10 synchronous drive through an actuator 16, need not set up actuator 16 to drive respectively, is favorable for avoiding cost increase, in conclusion, the utility model discloses a double -deck flow air conditioner of three damper air intake box structure, not only makes each damper coaxial, in order to reduce the volume of air intake box structure, and guarantees the structural strength of each damper itself and the stability of rotatable connection with air intake casing 1, also avoids cost increase, therefore, the utility model can effectively solve the problem that the volume of existing air intake box structure is relatively large because of the coaxial difficulty of damper, is favorable for reducing the volume of air intake box structure and improving the stability of automobile double -deck flow air conditioner operation.

[0035] Please refer to Figure 3 and Figure 4 , sleeve and second rotation axis 12 clearance fit, and the second rotation axis 12 is rotatably connected with the shaft hole on the two air inlet baffles 4;In this way, the second rotation axis 12 is rotatably connected with the air intake casing 1 through the shaft hole on the two air inlet baffles 4, and the sleeve is rotatably connected with the air intake casing 1 through the shaft hole on the side wall of the air intake casing 1 and the shaft hole on the air inlet baffle 4 away from the first damper 8, and the sleeve and the second rotation axis 12 are clearance fit and do not contact to generate friction force, when two actuators 16 are used to drive the first damper 8, the third damper 10 and the second damper 9 respectively, the rotation of the sleeve and the second rotation axis 12 is independent of each other and does not interfere with each other, which can ensure the positioning accuracy of the rotation amplitude of each damper adjusted by the actuator 16.

[0036] Please refer toFigure 3 And Figure 5 In order to further save the cost, the second rotating shaft 12 and the sleeve 13 are connected with the shared actuator 16, and in order to ensure that the function of switching the air outlet mode of the air inlet box assembly through the three dampers is not limited, and the proportion of the indoor return air and the outdoor fresh air output through the upper air outlet 36 and the lower air outlet 37 is flexible and adjustable, the utility model also limits that the actuator 16 drives the second rotating shaft 12 and the sleeve 13 to rotate alternately, that is, the first damper 8 and the third damper 10 located on both sides and realizing synchronous rotation through the transmission shaft 17 rotate alternately with the second damper 9 located in the middle; it can be understood that the forward driving stroke of the actuator 16 is divided into two stages, in order to facilitate the description, the following is described by replacing the first damper 8 and the third damper 10 with the two side dampers and replacing the first air inlet channel 5 and the third air inlet channel 7 with the two side air inlet channels;

[0037] The first stage: the second damper 9 is rotated to make the second air inlet channel 6 communicate with the return air inlet 3, the two side dampers are not moved and make the two side air inlet channels communicate with the fresh air inlet 2, the second stage: the second damper 9 is not moved and makes the second air inlet channel 6 communicate with the return air inlet 3, the two side dampers are rotated to make the two side air inlet channels communicate with the return air inlet 3; similarly, the reverse driving stroke of the actuator 16 is also divided into two stages, the first stage: the second damper 9 is not moved and makes the second air inlet channel 6 communicate with the return air inlet 3, the two side dampers are rotated to make the two side air inlet channels communicate with the fresh air inlet 2, the second stage: the second damper 9 is rotated to make the second air inlet channel 6 communicate with the return air inlet 3, the two side dampers are not moved and make the two side air inlet channels communicate with the fresh air inlet 2.

[0038] Please refer to Figure 6 And Figure 7 In order to realize that the second rotating shaft 12 and the sleeve 13 share an actuator 16 and can drive the second rotating shaft 12 and the sleeve 13 to rotate alternately, specifically, the embodiment adopts the following structure form:

[0039] The output rotating shaft of the actuator 16 is transversely arranged and vertically connected with a driving disc 20, the driving disc 20 has a first guide groove 21 and a second guide groove 22 on the side facing the air inlet casing 1; the first guide groove 21 comprises a first circular arc segment 23 and a first guide segment 24, the first circular arc segment 23 is concentric with the driving disc 20, one end of the first guide segment 24 is communicated with one end of the first circular arc segment 23, and the other end of the first guide segment 24 extends close to the center of the driving disc 20; the second guide groove 22 comprises a second circular arc segment 25 and a second guide segment 26, the second circular arc segment 25 is concentric with the driving disc 20, one end of the second guide segment 26 is communicated with one end of the second circular arc segment 25, and the other end of the second guide segment 26 extends away from the center of the driving disc 20; the central angle of the first circular arc segment 23 is equal to the central angle corresponding to the second guide segment 26, and the central angle corresponding to the first guide segment 24 is equal to the central angle of the second circular arc segment 25; under the same rotation direction of the driving disc 20, the first circular arc segment 23 is located in front of the first guide segment 24, and the second circular arc segment 25 is located behind the second guide segment 26;

[0040] The sleeve 13 extends out of the air inlet casing 1 at the end away from the second air door 9 and has external teeth, the air inlet casing 1 is rotationally provided with a driving gear 27 engaged with the external teeth, the driving gear 27 has a first rocker plate 28 extending radially thereon, the first rocker plate 28 is formed with a first guide column 29 protruding along the transverse direction at the side away from the air inlet casing 1, the first guide column 29 extends into the first guide groove 21, and the diameter of the first guide column 29 matches the width of the first guide groove 21; the second rotating shaft 12 is vertically connected with a second rocker plate 30 at the end extending out of the air inlet casing 1, the external teeth are located between the air inlet casing 1 and the second rocker plate 30, the second rocker plate 30 is formed with a second guide column 31 protruding along the transverse direction at the side away from the air inlet casing 1, the second guide column 31 extends into the second guide groove 22, and the diameter of the second guide column 31 matches the width of the second guide groove 22; when the second air door 9 and the third air door 10 both make the corresponding air inlet passages communicated with the fresh air inlet 2, the second guide column 31 is located at the end of the second guide segment 26 extending away from the center of the driving disc 20, and the first guide column 29 is located at the end of the first circular arc segment 23 away from the first guide segment 24;

[0041] Thus, when the second air inlet channel 6 and the two side air inlet channels are communicated with the fresh air inlet 2 respectively, the second guide column 31 is located at the end of the second guide segment 26 extending away from the center of the driving disc 20, and the first guide column 29 is located at the end of the first circular segment 23 away from the first guide segment 24; the output rotating shaft of the actuator 16 drives the driving disc 20 to rotate forward (clockwise in the state shown in the figure), and in the process of rotating to the angle corresponding to the central angle of the first circular segment 23, the second guide column 31 is forced to slide in the second guide segment 26 to approach the center of the driving disc 20 due to the gradually decreasing distance between the second guide segment 26 and the center of the driving disc 20, so that the second guide column 31 drives the second rotating shaft 12 to rotate reversely through the second rocker plate 30, and the second air door 9 is rotated to communicate the second air inlet channel 6 with the return air inlet 3; the distance between the first guide column 29 and the center of the driving disc 20 remains unchanged when the first guide column 29 slides in the first circular segment 23 due to the unchanged distance between the first circular segment 23 and the center of the driving disc 20, so that the first guide column 29 remains unchanged, and correspondingly, the driving gear 27 and the sleeve 13 also do not rotate, and the two side air doors keep the two side air inlet channels communicated with the fresh air inlet 2; this corresponds to the first stage of the forward driving stroke of the actuator 16 described above.

[0042] The output rotating shaft of the actuator 16 continues to drive the driving disc 20 to rotate forward, and in the process of rotating to the angle corresponding to the central angle of the first guide slot 21 from the angle corresponding to the central angle of the first circular segment 23, the distance between the second guide column 31 and the center of the driving disc 20 remains unchanged when the second guide column 31 slides in the second circular segment 25 due to the unchanged distance between the second circular segment 25 and the center of the driving disc 20, so that the second guide column 31 remains unchanged, and correspondingly, the second rocker plate 30 and the second rotating shaft 12 also do not rotate, and the second air door 9 keeps the second air inlet channel 6 communicated with the return air inlet 3; the distance between the first guide column 29 and the center of the driving disc 20 gradually approaches the center of the driving disc 20 when the first guide column 29 slides in the first guide segment 24, so that the first guide column 29 drives the driving gear 27 to rotate forward through the first rocker plate 28, the driving gear 27 drives the sleeve 13 to rotate reversely through the external gear, and the two side air doors are rotated to communicate the two side air inlet channels with the return air inlet 3; this corresponds to the second stage of the forward driving stroke of the actuator 16 described above; the reverse driving stroke of the actuator 16 is opposite to the above, which will not be described here again; in addition, the first rocker plate 28 in which the first guide column 29 is located does not rotate in the process of the rotation of the second air door 9 due to the constraint of the first circular segment 23 on the first guide column 29, and the second rocker plate 30 in which the second guide column 31 is located does not rotate in the process of the rotation of the third air door 10 due to the constraint of the second circular segment 25 on the second guide column 31, so that although the sleeve 13 for the rotation of the third air door 10 is rotatably sleeved on the second rotating shaft 12 for the rotation of the second air door 9, the second air door 9 and the third air door 10 will not rotate synchronously due to friction.

[0043] Please refer toFigure 4 and Figure 7 , the outer tooth sleeve 32 is coaxially rotatably sleeved on the second rotating shaft 12 and gap-fitted, the outer tooth sleeve 32 forms the outer tooth outside the air inlet shell 1; in this way, since the first air door 8, the second air door 9 and the third air door 10 are all integrally formed plastic parts, in order to facilitate the processing and manufacturing and to ensure the precision of the outer tooth, the outer tooth is formed by the outer tooth sleeve 32 which is independent of the sleeve 13, the end of the outer tooth sleeve 32 towards the third air door 10 extends into the sleeve 13 and is spline-connected.

[0044] Please see Figure 1 , Figure 8 and Figure 9 , the double-layer flow air conditioner further comprises a volute structure connected to the lower part of the air inlet box structure and composed of an air inlet box assembly, specifically, the volute structure comprises a volute shell 33, the volute shell 33 has an upper opening in the inside, and an air outlet cavity is formed in the side surface, the upper part of the volute shell 33 is connected with the lower part of the air inlet shell 1 and the air outlet cavity is communicated with the air inlet cavity, a filter element 34 is arranged in the connection part between the upper part of the volute shell 33 and the lower part of the air inlet shell 1, and an air outlet partition plate 35 is arranged horizontally in the air outlet cavity, which divides the air outlet cavity into upper and lower two layers and correspondingly divides the air outlet into upper air outlet 36 and lower air outlet 37; a blower 38 is connected to the lower part of the volute shell 33, the impeller 39 of the blower 38 is in a cylindrical shape and comprises two parallel annular connecting plates and a plurality of blades which are connected between the two annular connecting plates and are uniformly distributed in the circumferential direction, the impeller 39 is vertically arranged in the air outlet cavity and the upper end extends above the air outlet partition plate 35 through the clearance hole in the middle part of the air outlet partition plate 35; a partition sleeve 40 is vertically arranged in the inside of the impeller 39, the partition sleeve 40 has tapered flares at both ends, the tapered flares at the upper end are matched with the two air inlet partition plates 4, so that the inside of the partition sleeve 40 is communicated with the second air inlet passage 6 and the outside is communicated with the first air inlet passage 5 and the third air inlet passage 7, and the tapered flares at the lower end are located above the air outlet partition plate 35 and extend in the circumferential direction close to the air outlet partition plate 35, so that the inside of the partition sleeve 40 is communicated with the lower layer 41 of the air outlet cavity through the gap between the blades and the outside is communicated with the upper layer 42 of the air outlet cavity through the gap between the blades; so that the two side air inlet passages are communicated with the upper layer 42 of the air outlet cavity to form an upper layer air inlet passage, and the second air inlet passage 6 is communicated with the lower layer 41 of the air outlet cavity to form a lower layer air inlet passage.

[0045] To facilitate further understanding of the scheme, the working principle of the air inlet box assembly is introduced as follows: when the three dampers respectively make the corresponding air inlet passages communicate with the fresh air inlet 2, the upper air outlet 36 and the lower air outlet 37 both output the outdoor fresh air, at this time, the air inlet box assembly is in a full fresh air supply mode; when the three dampers respectively make the corresponding air inlet passages communicate with the return air inlet 3, the upper air outlet 36 and the lower air outlet 37 both output the indoor return air, at this time, the air inlet box assembly is in a full return air supply mode; when the first damper 8 and the third damper 10 respectively make the corresponding air inlet passages communicate with the fresh air inlet 2, and the second damper 9 makes the second air inlet passage 6 communicate with the return air inlet 3, the upper air outlet 36 outputs the outdoor fresh air so as to realize the defogging and defrosting functions, and the lower air outlet 37 outputs the indoor return air so as to realize the indoor heating function, at this time, the air inlet box assembly is in a mixed air supply mode; in addition, thanks to the asynchronous rotation of the middle damper and the two side dampers driven by the actuator 16 through the second rotating shaft 12 and the sleeve 13, the air inlet box assembly can also flexibly adjust the rotating angles of the middle damper and the two side dampers on the basis of the above three modes, so that the air inlet box assembly has a more comprehensive air distribution ratio for the output of the indoor return air and the outdoor fresh air, which is beneficial to improving the use flexibility and practicability of the air inlet box structure.

[0046] Please refer to Figure 1 and Figure 10 , the double-layer flow air conditioner further comprises a distribution box structure, the distribution box structure comprises a distribution shell 43, the distribution shell 43 is provided with an upper air inlet 44, a lower air inlet 45, a defrosting air outlet 46, a front row blowing face air outlet 47, a front row blowing foot air outlet 48, a rear row blowing face air outlet 49 and a rear row blowing foot air outlet 50, the distribution shell 43 is connected with the volute shell 33 and the upper air inlet 44 and the upper air outlet 36 are communicated, and the lower air inlet 45 and the lower air outlet 37 are communicated; the distribution shell 43 is divided into an upper air outlet passage and a lower air outlet passage, the upper air outlet passage is respectively communicated with the upper air inlet 44, the defrosting air outlet 46, the front row blowing face air outlet 47 and the rear row blowing face air outlet 49, and the lower air outlet passage is respectively communicated with the lower air inlet 45, the front row blowing foot air outlet 48 and the rear row blowing foot air outlet 50; the distribution shell 43 is provided with an evaporator core and a heating core, the evaporator core can dehumidify and cool the air flow in the upper air outlet passage and the lower air outlet passage respectively, and the heating core can heat the air flow in the upper air outlet passage and the lower air outlet passage respectively.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application rather than limit the technical solutions, and those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions, which should be covered in the scope of the claims of the present application.

Claims

1. A double-layer flow air conditioner with a three-damper air inlet box structure, comprising an air inlet box structure, the air inlet box structure comprising an air inlet shell, the air inlet shell having a fresh air inlet and a return air inlet at an upper portion, the air inlet shell having an air inlet cavity with a lower opening and an upper portion respectively communicating with the fresh air inlet and the return air inlet, the air inlet shell having two vertical air inlet partitions in the air inlet cavity and separating the air inlet cavity into a first air inlet channel, a second air inlet channel and a third air inlet channel arranged in sequence in a transverse direction and independent of each other, each air inlet channel having a rotatable first damper, a second damper and a third damper respectively arranged correspondingly, each damper being rotatable to switch the corresponding air inlet channel to communicate with the fresh air inlet and the return air inlet respectively; characterized in that: The first air door is rotationally connected with the air inlet shell through a first rotation shaft arranged transversely, the second air door is rotationally connected with the air inlet shell through a second rotation shaft, the second rotation shaft is coaxial with the first rotation shaft, and the third air door is rotationally connected with the air inlet shell through a sleeve coaxially arranged outside the second rotation shaft; one end of the second rotation shaft away from the first air door rotationally extends outside the air inlet shell and is connected with an actuator, so as to drive the second air door to rotate; a transmission shaft parallel to and spaced from the second rotation shaft is arranged outside the rotation range of the second air door in the second air inlet channel, both ends of the transmission shaft rotationally pass through the two air inlet partitions and are coaxially fixedly connected with first transmission gears, second transmission gears are coaxially fixedly arranged on the first rotation shaft and the sleeve, the second transmission gears are engaged with the first transmission gears in the air inlet channel, and one end of the sleeve away from the second air door rotationally extends outside the air inlet shell and is connected with an actuator, so as to drive the first air door and the third air door to rotate.

2. The double layer flow air conditioner with three damper air intake box structure according to claim 1, characterized in that: The sleeve is gap-fitted with the second rotation shaft, and the second rotation shaft is rotationally fitted with the shaft holes of the two air inlet partitions.

3. The double layer flow air conditioner with three damper air intake box structure according to claim 1, characterized in that: The double-layer flow air conditioner further comprises a volute structure, the volute structure comprises a volute shell, the volute shell has an upper opening and an air outlet cavity formed with an air outlet on a side, the upper part of the volute shell is connected with the lower part of the air inlet shell and the air outlet cavity is communicated with the air inlet cavity, an air outlet partition is horizontally arranged in the air outlet cavity, the air outlet partition divides the air outlet cavity into upper and lower layers and divides the air outlet into an upper air outlet and a lower air outlet, a blower fan is connected with the lower part of the volute shell, the impeller of the blower fan is in a cylindrical shape and comprises two parallel annular connecting plates and a plurality of blades which are connected between the two annular connecting plates and are uniformly distributed in a circumferential direction, the impeller is vertically arranged in the air outlet cavity and extends above the air outlet partition through a clearance hole in the middle of the air outlet partition, a partition sleeve is vertically arranged on the inner side of the impeller, the partition sleeve has tapered flares at both ends, the tapered flare at the upper end is matched with the two air inlet partitions, so that the inner side of the partition sleeve is communicated with the second air inlet channel and the outer side is communicated with the first air inlet channel and the third air inlet channel, and the tapered flare at the lower end is located above the air outlet partition and extends in a circumferential direction to be close to the air outlet partition, so that the inner side of the partition sleeve is communicated with the lower layer of the air outlet cavity through the gaps between the blades and the outer side is communicated with the upper layer of the air outlet cavity through the gaps between the blades.

4. The double layer flow air conditioner with three damper air inlet box structure according to claim 3, characterized in that: The double-layer flow air conditioner further comprises a distribution box structure, the distribution box structure comprises a distribution shell, the distribution shell is provided with an upper air inlet, a lower air inlet, a defrost air outlet, a front row of face air outlet, a front row of foot air outlet, a rear row of face air outlet and a rear row of foot air outlet, the distribution shell is connected with the volute shell and the upper air inlet is communicated with the upper air outlet and the lower air inlet is communicated with the lower air outlet, the distribution shell is divided into an upper air outlet channel and a lower air outlet channel, the upper air outlet channel is respectively communicated with the upper air inlet, the defrost air outlet, the front row of face air outlet and the rear row of face air outlet, and the lower air outlet channel is respectively communicated with the lower air inlet, the front row of foot air outlet and the rear row of foot air outlet, and the distribution shell is provided with an evaporator core and a heating core, the evaporator core can dehumidify and cool air flows in the upper air outlet channel and the lower air outlet channel, and the heating core can heat air flows in the upper air outlet channel and the lower air outlet channel.

5. The double layer flow air conditioner with three damper air intake box structure according to claim 1, characterized in that: The second rotating shaft and the sleeve share an actuator, and the actuator drives the second rotating shaft and the sleeve to rotate alternately.

6. The double layer flow air conditioner with three damper air intake box structure according to claim 1, characterized in that: The second rotating shaft and the sleeve share an actuator, and an output rotating shaft of the actuator is arranged transversely and is connected perpendicularly with a driving disc, one side of the driving disc facing the air inlet shell has a first guide slot and a second guide slot; the first guide slot comprises a first circular arc segment and a first guide segment, the first circular arc segment is concentric with the driving disc, one end of the first guide segment is communicated with one end of the first circular arc segment, and the other end of the first guide segment extends close to the center of the driving disc; the second guide slot comprises a second circular arc segment and a second guide segment, the second circular arc segment is concentric with the driving disc, one end of the second guide segment is communicated with one end of the second circular arc segment, and the other end of the second guide segment extends away from the center of the driving disc; the central angle of the first circular arc segment is equal to the central angle corresponding to the second guide segment, and the central angle corresponding to the first guide segment is equal to the central angle of the second circular arc segment; under the same rotation direction of the driving disc, the first circular arc segment is located in front of the first guide segment, and the second circular arc segment is located behind the second guide segment; The end of the sleeve away from the second air door extends out of the air inlet shell and has external teeth, a driving gear meshing with the external teeth is arranged rotatably on the air inlet shell, the driving gear has a first rocker plate extending radially, and the side of the first rocker plate away from the air inlet shell is formed with a first guide column protruding along the transverse direction, the first guide column extends into the first guide slot, and the diameter of the first guide column matches the width of the first guide slot; the end of the second rotating shaft extending out of the air inlet shell is connected perpendicularly with a second rocker plate, the external teeth are located between the air inlet shell and the second rocker plate, and the side of the second rocker plate away from the air inlet shell is formed with a second guide column protruding along the transverse direction, the second guide column extends into the second guide slot, and the diameter of the second guide column matches the width of the second guide slot; when the second air door and the third air door make the corresponding air inlet passages communicate with the fresh air inlet, the second guide column is located at the end of the second guide segment extending away from the center of the driving disc, and the first guide column is located at the end of the first circular arc segment away from the first guide segment.

7. The double layer flow air conditioner with three damper air inlet box structure according to claim 6, characterized in that: The end of the sleeve away from the second air door is synchronously connected with an external tooth sleeve, the end of the sleeve away from the second air door is rotatably extended out of the air inlet shell through the external tooth sleeve, the external tooth sleeve is coaxially rotatably arranged outside the second rotating shaft and is gap-fitted, and the external tooth sleeve forms the external teeth outside the air inlet shell.

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