Air supply system of automobile air conditioner

Abstract

The air supply system of the automobile air conditioner comprises a fresh and return air flow path control module and a draught fan module, the fresh and return air flow path control module is provided with two air inlets and an air outlet, the two air inlets are a fresh air opening and a return air opening respectively, and a rotary air door is rotatably installed in the fresh and return air flow path control module; switching of a full fresh air mode, a full return air mode and a fresh and return air mixed mode is achieved through rotation of the rotary air door. The air conditioner is characterized in that the fan module comprises a turbofan assembly arranged on the downstream of the air outlet. The air supply system has the advantages that the structure is simple, the number of parts is small, the fan module is the turbofan assembly arranged on the downstream of the air outlet, the air flow direction of a turbofan is parallel to the rotating shaft, larger air volume can be output with smaller occupied space, compared with a traditional structure, the size of the whole air supply system can be reduced by about 40%, and application and arrangement are easy; in addition, the partition plate is additionally arranged on the rotary air door, double-layer flow can be achieved, and heating energy consumption of an automobile air conditioner is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of automobile air conditioners, and in particular to an air supply system of an automobile air conditioner. Background Art

[0002] In the air supply system of automobile air conditioners, the new return air flow control module and the fan assembly are core components. The new return air flow control module is mainly responsible for adjusting the source and direction of air: switching the external fresh air and the return air in the car through the damper, or mixing the two, to achieve the control of the air source, ensure the quality of air entering the air conditioner, and at the same time play a role in energy saving; the fan assembly is responsible for air delivery and air volume adjustment: the fan is driven by a brushed or brushless motor to deliver air into the air duct of the automobile air conditioner to achieve air delivery to ensure air flow; the air volume is controlled by adjusting the speed of the motor to meet different usage requirements. That is, the new return air flow control module is used to determine the source of air, and the fan assembly is responsible for air delivery. The two work together to provide air supply solutions for automobile air conditioners.

[0003] The fan assemblies currently used in the air supply system of automobile air conditioners can be divided into centrifugal and mixed flow types according to their working principles. For centrifugal blowers, a huge volute is required to guide the air outlet, resulting in a larger overall layout size; for mixed flow blowers, the airflow will have two airflow bends in the fan. Although a huge volute is not required to guide the air outlet, its external dimensions are also larger, and there are certain difficulties in the layout of specific applications. Due to the limitations of the structural principles of these two blowers, their air inlet areas are small, and the wind resistance loss before the airflow flows in is large, which not only affects the air supply volume, but also increases the risk of low-frequency roaring noise. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an air supply system for an automobile air conditioner which has a simple and compact structure, is easy to apply and arrange, has a large air inlet area and has a small flow resistance loss during operation.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: A ventilation system for an automobile air conditioner comprises a new return air flow path control module and a fan module, wherein the new return air flow path control module has two air inlets and one air outlet, wherein the two air inlets are respectively a fresh air inlet for communicating with a space outside the vehicle and a return air inlet for communicating with a space inside the vehicle, wherein a rotary damper is rotatably installed in the new return air flow path control module, wherein a rotation center axis of the rotary damper is parallel to a main gas flow direction of the air outlet, and wherein the rotation of the rotary damper is used to realize switching between a fresh air mode in which only the fresh air inlet is connected to the air outlet, a full return air mode in which only the return air inlet is connected to the air outlet, and a new return air mixed mode in which both the fresh air inlet and the return air inlet are connected to the air outlet, and wherein the fan module comprises a turbofan assembly arranged downstream of the air outlet.

[0006] The turbofan assembly comprises at least one turbofan unit stage, and the turbofan unit stage is composed of a stationary blade fan and a moving blade fan coaxially arranged.

[0007] In one of the turbofan unit stages: the moving blade fan and the stationary blade fan are arranged in sequence along the main gas flow direction of the air outlet; when multiple turbofan unit stages are used in combination: all of the moving blade fans and the stationary blade fans are coaxial, and one stationary blade fan is arranged between two of the moving blade fans.

[0008] The rotary damper comprises a rotating shaft, the central axis of the rotating shaft is parallel to the main gas flow direction of the air outlet, and the plane where the central axis of the rotating shaft is located is used as a boundary to divide the area around the side of the rotating shaft into an open area and a closed area, and the closed area is provided with a damper baffle fixedly connected to the rotating shaft, and the damper baffle is driven by the rotation of the rotating shaft to change its position to realize switching between a fresh air mode in which only the fresh air outlet is connected to the air outlet, a full return air mode in which only the return air outlet is connected to the air outlet, and a new-return air mixed mode in which both the fresh air outlet and the return air outlet are connected to the air outlet.

[0009] The open area is provided with an inlet baffle for forming a multi-layer flow of the airflow.

[0010] The rotating shaft is driven by an actuator, and the rotating damper has an installation space for installing the actuator.

[0011] A filter component for filtering airflow is detachably connected between the air outlet and the turbofan assembly.

[0012] The air outlet of the turbofan assembly is provided with a filter component for filtering the airflow.

[0013] The outer ends of all blades of the moving blade fan near the air outlet are connected through a wind shielding ring.

[0014] Compared with the prior art, the advantages of the present invention are: simple structure, fewer parts, the fan module is a turbofan assembly arranged downstream of the air outlet, the gas flow direction of the turbofan is parallel to the rotating shaft, and it can output a larger air volume while occupying a smaller space. Compared with the traditional structure, the volume of the entire air supply system can be reduced by about 40%, and it is easy to apply and arrange. The turbofan has a large air inlet area and a small flow resistance loss during operation, which is conducive to improving the air supply efficiency and can effectively reduce the risk of low-frequency roaring noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the first embodiment of the present invention in the full return air mode; FIG2 (a) is a schematic diagram of a first three-dimensional structure of a new return air flow path control module in the present invention; FIG2( b ) is a second three-dimensional structural schematic diagram of the new return air flow path control module of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the rotary damper in the first embodiment of the present invention; Figure 4 This is a schematic diagram of the decomposed structure of the first embodiment of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the new return air flow path control module and the rotary damper installed in the full return air mode in the first embodiment of the present invention; Figure 6 This is a schematic diagram of the three-dimensional structure of the first embodiment of the present invention in the fresh air mode; Figure 7 It is a schematic diagram of the three-dimensional structure of the new return air flow path control module and the rotary damper installed in cooperation in the fresh air mode according to the first embodiment of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the first embodiment of the present invention in the new return air mixing mode; Fig. 9 It is a schematic diagram of the three-dimensional structure of the new return air flow path control module and the rotary damper installed in cooperation with each other in the new return air mixing mode in the first embodiment of the present invention; Fig.10 It is a schematic diagram of the three-dimensional structure of the new return air flow path control module and the rotary damper installed in the full return air mode in the second embodiment of the present invention; Fig.11 It is a schematic diagram of the three-dimensional structure of the new return air flow path control module and the rotary damper installed in coordination in the fresh air mode according to the second embodiment of the present invention; Fig.12 It is a schematic diagram of the three-dimensional structure of the new return air flow path control module and the rotary damper installed in cooperation with each other in the new return air mixing mode in the second embodiment of the present invention; Fig.13 It is a schematic diagram of the three-dimensional structure of the rotary damper in the second embodiment of the present invention. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below with reference to the accompanying drawings.

[0017] Embodiment 1: As shown in the figure, an air supply system of an automobile air conditioner includes a new return air flow path control module 1 and a fan module 2. The new return air flow path control module 1 has two air inlets and an air outlet 11. The two air inlets are respectively a fresh air inlet 12 for communicating with the space outside the vehicle and a return air inlet 13 for communicating with the space inside the vehicle. A rotating damper 3 is rotatably installed in the new return air flow path control module 1. The rotation center axis of the rotating damper 3 is parallel to the main gas flow direction of the air outlet 11. The rotation of the rotating damper 3 is used to realize the switching of a fresh air mode in which only the fresh air inlet 12 is connected to the air outlet 11, a full return air mode in which only the return air inlet 13 is connected to the air outlet 11, and a new return air mixed mode in which both the fresh air inlet 12 and the return air inlet 13 are connected to the air outlet 11. The fan module 2 includes a turbofan assembly arranged downstream of the air outlet 11.

[0018] Preferably, the turbofan assembly includes at least one group of turbofan unit stages 20, and the turbofan unit stage 20 is composed of a stator fan 202 and a moving blade fan 201 arranged coaxially. The blades of the stator fan 202 are fixed and non-rotating stator blades, and the blades of the moving blade fan 201 are moving blades rotating around the rotating shaft of the fan. The center of the moving blade fan 201 is provided with a layout space for arranging a motor for driving the moving blades to rotate. All blades in each fan are arranged in a manner of uniformly radiating from the center of the fan rotating shaft to the surroundings. The moving blade fan 201 is responsible for speeding up the airflow, and the stator fan 202 is responsible for guiding and shaping the airflow to meet the requirements of subsequent parts for the airflow field, and finally make the outflow direction of the main airflow path parallel to the rotating shaft of the fan.

[0019] Preferably, in one turbofan unit stage 20: the moving blade fan 201 and the stationary blade fan 202 are arranged in sequence along the main gas flow direction of the air outlet 11; when multiple turbofan unit stages 20 are used in combination: all the moving blade fans 201 and the stationary blade fans 202 are coaxial, and a stationary blade fan 202 is arranged between two moving blade fans 201. One turbofan unit stage 20 or a combination of multiple turbofan unit stages 20 can be selected according to different usage requirements. When multiple turbofan unit stages 20 are selected for use in combination, the air output can be increased by relaying work at each stage. When the fan needs to provide a larger pressure head, the use of a multi-stage turbofan can effectively reduce the load of each blade and improve the stability of the fan operation.

[0020] Preferably, the rotary damper 3 includes a rotary shaft 31, the central axis of the rotary shaft 31 is parallel to the main gas flow direction of the air outlet 11, and the area around the side of the rotary shaft 31 is divided into an open area 32 and a closed area 33 with the plane where the central axis of the rotary shaft 31 is located as a boundary, and the closed area 33 is provided with a damper baffle 30 fixedly connected to the rotary shaft 31, and the rotary shaft 31 rotates to drive the damper baffle 30 to change position to realize the switching of the fresh air mode in which only the fresh air outlet 12 is connected to the air outlet 11, the full return air mode in which only the return air outlet 13 is connected to the air outlet 11, and the new return air mixed mode in which both the fresh air outlet 12 and the return air outlet 13 are connected to the air outlet 11. The structure is simple, wherein the positions of the fresh air outlet 12 and the return air outlet 13 are designed according to the specific structure of the rotary damper 3, so as to realize the stable switching of the above three modes.

[0021] Preferably, the rotating shaft 31 is driven by an actuator (not shown in the figure), and the rotary damper 3 has an installation space 300 for installing the actuator.

[0022] Preferably, a filter assembly 4 for filtering the airflow is detachably connected between the air outlet 11 and the turbofan assembly. The filter assembly 4 is used to filter out harmful substances in the airflow, so that the air finally flowing out is cleaner and beneficial to health.

[0023] In addition, according to usage requirements, corresponding baffles can be set in the fresh air inlet 12 or the return air inlet 13 to form a plurality of different air flow channels.

[0024] In this embodiment, two turbofan unit stages 20 are used in combination, that is, a two-stage turbofan. In comparison, a single stage cannot overcome the required pressure head, and the space required for three stages and above is large, and the feasibility is not high. Therefore, the combination of two unit stages is the most appropriate method. The two turbofan unit stages 20 are arranged in sequence as a first-stage moving blade fan 201, a first-stage stationary blade fan 202, a second-stage moving blade fan 201, and a second-stage stationary blade fan 202.

[0025] In the fresh air mode, the rotary damper 3 is driven by the actuator, and the return air outlet 13 is completely blocked by the damper baffle 30, so that the airflow enters the open area 32 of the rotary damper 3 from the fresh air outlet 12, and then the airflow flows out from the air outlet 11, and after being filtered by the filter assembly 4, enters the first-level moving blade fan 201, and after being accelerated by the first-level moving blades, enters the first-level stationary blade fan 202, and the airflow direction is corrected by the first-level stationary blades. Then the airflow enters the second-level moving blade fan 201, and after being accelerated again by the second-level moving blades, enters the second-level stationary blade fan 202, and after the airflow direction is corrected by the second-level stationary blades, it flows out of the air supply system and enters the subsequent mechanism of the automobile air conditioner; In the full return air mode, the rotary damper 3 is driven by the actuator, and the fresh air outlet 12 is completely blocked by the damper baffle 30, so that the airflow enters the open area 32 of the rotary damper 3 from the return air outlet 13, and the subsequent operation is the same as the above-mentioned fresh air mode; In the fresh air and return air mixed mode, the rotary damper 3 is driven by the actuator to partially block the fresh air inlet 12 and the return air outlet through the damper baffle 30, so that the airflow enters the open area 32 of the rotary damper 3, and the subsequent operation is the same as the fresh air mode.

[0026] Embodiment 2: The other parts are the same as Embodiment 1, except that the open area 32 is provided with an inlet baffle 35 for forming a multi-layer flow shape of the airflow. According to the number of inlet baffles 35, a double-layer flow shape or a multi-layer flow shape is realized to reduce the heating energy consumption of the automobile air conditioner. In this way, according to different usage requirements, on the basis of adopting the same new return air flow path control module 1, it is only necessary to replace the rotary damper 3 without the inlet baffle 35 or the rotary damper 3 with the inlet baffle 35 to realize the switching of the air supply mode of the single-layer flow shape, the double-layer flow shape or the multi-layer flow shape. The difference between the double-layer flow shape and the multi-layer flow shape lies in the number of baffles, and the manufacture of the rotary damper 3 is also relatively simple. The rotary damper 3 with baffles only needs to be slightly modified on the basis of the mold of the original rotary damper 3 without baffles, which greatly reduces the production cost.

[0027] In this specific embodiment, an inlet partition 35 is provided in the open area 32, and a corresponding outlet partition (not shown in the figure) is provided at the outlet of the turbofan to realize a double-layer flow-shaped air supply. The actuator is used to drive the rotary damper 3 to the corresponding position, so that the airflow simultaneously enters the open area 32 of the rotary damper 3 from the fresh air inlet 12 or the return air inlet 13 or the fresh air inlet 12 and the return air inlet 13. Due to the presence of the inlet partition 35 and the outlet partition, the airflows on both sides will not interfere with each other, and will flow out of the outlet of the rotary damper 3 and enter the first-stage moving blade fan 201. Due to the working characteristics of the turbofan, there will be a certain phase difference between the airflow at the inlet of the first-stage moving blade fan 201 and the airflow at the outlet of the second-stage static blade fan 202, so the double-layer flow-shaped air supply can be adjusted according to the angle of the partition.

[0028] Embodiment 3: The other parts are the same as those of Embodiment 1 or 2, except that a filter assembly 4 for filtering the airflow is arranged at the air outlet of the turbofan assembly.

[0029] Embodiment 4: The other parts are the same as Embodiment 1, 2 or 3, except that the outer ends of all blades of the moving blade fan 201 are connected by a wind shield ring, which is disposed inside the outer shell of the moving blade fan 201 and has a gap with the outer shell. One end of the blade of the moving blade fan 201 is connected to the rotating shaft of the fan, and the other end is connected to the wind shield ring to improve the overall strength and reduce backflow. A certain gap is left between the wind shield ring and the outer shell of the fan to facilitate the rotation of the blades. One end of the blade of the stationary blade fan 202 is connected to the outer shell of the fan, and the other end is connected to the motor stator of the fan or is suspended in the air with a certain gap between it and the motor rotor of the fan so that it does not participate in the rotation.

[0030] Embodiment 5: The other parts are the same as Embodiment 1, 2, 3 or 4, except that a guide vane or an airflow straightening device can be added between the moving blade fan 201 close to the air outlet 11 and the air outlet 11, so that the airflow coming out of the air outlet 11 can enter the first moving blade fan 201 at the optimal angle.

Claims

1. An air supply system for an automobile air conditioner, comprising a new-return air flow path control module and a fan module, the new-return air flow path control module having two air inlets and one air outlet, the two air inlets being respectively a fresh air inlet for communicating with a space outside the vehicle and a return air inlet for communicating with a space inside the vehicle, a rotating damper being rotatably installed in the new-return air flow path control module, the rotation center axis of the rotating damper being parallel to the main flow direction of gas at the air outlet, the rotation of the rotating damper being used to realize switching between a fresh air mode in which only the fresh air inlet is connected to the air outlet, a full return air mode in which only the return air inlet is connected to the air outlet, and a new-return air mixed mode in which both the fresh air inlet and the return air inlet are connected to the air outlet, and the new-return air mixed mode is characterized in that The fan module includes a turbofan assembly arranged downstream of the air outlet.

2. The air supply system of an automobile air conditioner according to claim 1, characterized in that The turbofan assembly comprises at least one set of turbofan unit stages, and the turbofan unit stages are composed of a stationary blade fan and a moving blade fan coaxially arranged.

3. The air supply system of an automobile air conditioner as claimed in claim 2, characterized in that In one of the turbofan unit stages: the moving blade fan and the stationary blade fan are arranged in sequence along the main gas flow direction of the air outlet; when multiple turbofan unit stages are used in combination: all of the moving blade fans and the stationary blade fans are coaxial, and one stationary blade fan is arranged between two of the moving blade fans.

4. The air supply system of an automobile air conditioner according to claim 1, characterized in that The rotary damper comprises a rotating shaft, the central axis of the rotating shaft is parallel to the main gas flow direction of the air outlet, and the plane where the central axis of the rotating shaft is located is used as a boundary to divide the area around the side of the rotating shaft into an open area and a closed area, and the closed area is provided with a damper baffle fixedly connected to the rotating shaft, and the damper baffle is driven by the rotation of the rotating shaft to change its position to realize switching between a fresh air mode in which only the fresh air outlet is connected to the air outlet, a full return air mode in which only the return air outlet is connected to the air outlet, and a new-return air mixed mode in which both the fresh air outlet and the return air outlet are connected to the air outlet.

5. The air supply system of the automobile air conditioner according to claim 4, characterized in that The open area is provided with an inlet baffle for forming the airflow into a multi-layer flow shape.

6. The air supply system of an automobile air conditioner as claimed in claim 4, characterized in that The rotating shaft is driven by an actuator, and the rotating damper has an installation space for installing the actuator.

7. The air supply system of an automobile air conditioner as claimed in claim 1, characterized in that A filter component for filtering airflow is detachably connected between the air outlet and the turbofan assembly.

8. The air supply system of an automobile air conditioner as claimed in claim 1, characterized in that The air outlet of the turbofan assembly is provided with a filter component for filtering the airflow.

9. The air supply system of a car air conditioner as claimed in claim 1, characterized in that The outer ends of all blades of the moving blade fan are connected through a wind shielding ring.

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