Air supply system of automobile air conditioner

Abstract

The utility model discloses an air supply system of an automobile air conditioner, which comprises a fresh air and return air flow path control module and a fan module, the fresh air and return air flow path control module is provided with two air inlets and an air outlet, the two air inlets are respectively a fresh air port and a return air port, and a rotary air door is rotatably mounted in the fresh air 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 utility model relates to the technical field of automobile air conditioner, especially to an air supply system of automobile air conditioner. BACKGROUND

[0002] In the air supply system of automobile air conditioner, the new return air flow path control module and the fan assembly are core components, wherein the new return air flow path control module is mainly responsible for adjusting the source and flow direction of air: through the air door switching external fresh air and indoor return air, or mixing both, realizing the control of air source, ensuring the air quality entering the air conditioner, and at the same time playing the role of energy saving; the fan assembly is responsible for the transportation and regulation of air volume: through the brush or brushless motor driving fan, air is sent into the air duct of automobile air conditioner, realizing the transportation of air to ensure the flow of air; by adjusting the speed of the motor, the air volume is controlled to meet different use requirements. That is, the new return air flow path control module is used to determine the source of air, and the fan assembly is used to transport air, and the two cooperate to provide an air supply solution for the automobile air conditioner.

[0003] At present, the fan assembly applied in the air supply system of automobile air conditioner can be divided into centrifugal type and mixed flow type according to the working principle, for the centrifugal type air blower, a huge volute is needed to guide the air outlet, resulting in large overall arrangement size; for the mixed flow type air blower, the airflow has 2 airflow angles in the fan, although a huge volute is not needed to guide the air outlet, but its external size is also large, and there is certain difficulty in the specific application arrangement. And based on the limitation of the structure principle of the two kinds of air blowers, the air inlet area is small, and the flow 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 booming noise. SUMMARY

[0004] The utility model wants to solve the technical problem to provide a kind of air supply system of automobile air conditioner, which is simple and compact in structure, easy to apply arrangement, large in air inlet area and small in flow resistance loss in working process.

[0005] The technical scheme adopted by the utility model to solve the above technical problem is:

[0006] An air supply system of an automobile air conditioner, comprising a fresh return air flow path control module and a fan module, the fresh return air flow path control module having two air inlets and one air outlet, the two air inlets being a fresh air inlet for communicating with an outside space and a return air inlet for communicating with an inside space, respectively, the fresh return air flow path control module being rotatably provided with a rotary damper, a central axis of the rotary damper being parallel to a main air flow path direction of the air outlet, the rotary damper being used to switch among a full fresh air mode in which only the fresh air inlet communicates with the air outlet, a full return air mode in which only the return air inlet communicates with the air outlet, and a fresh return air mixed mode in which both the fresh air inlet and the return air inlet communicate with the air outlet, the fan module comprising a turbo fan assembly arranged downstream of the air outlet.

[0007] The turbo fan assembly comprises at least one turbo fan unit stage, the turbo fan unit stage being composed of a stationary vane fan and a moving vane fan arranged coaxially.

[0008] In one turbo fan unit stage, the moving vane fan and the stationary vane fan are arranged in sequence along the main air flow path direction of the air outlet; in a plurality of turbo fan unit stages, all the moving vane fans and the stationary vane fans are coaxial, and a stationary vane fan is arranged between two moving vane fans.

[0009] The rotary damper comprises a rotary shaft, a central axis of the rotary shaft being parallel to the main air flow path direction of the air outlet, an open region and a closed region being separated by a plane in which the central axis of the rotary shaft is located, the closed region being provided with a damper baffle fixedly connected to the rotary shaft, the rotary shaft being used to drive the damper baffle to change position to switch among the full fresh air mode in which only the fresh air inlet communicates with the air outlet, the full return air mode in which only the return air inlet communicates with the air outlet, and the fresh return air mixed mode in which both the fresh air inlet and the return air inlet communicate with the air outlet.

[0010] The open region is provided with an inlet partition plate for forming a multi-layer air flow.

[0011] The rotary shaft is driven by an actuator, and the rotary damper has a mounting space for mounting the actuator.

[0012] A filter assembly for filtering air flow is detachably connected between the air outlet and the turbo fan assembly.

[0013] The air outlet of the turbo fan assembly is provided with a filtering assembly for filtering air flow.

[0014] The outer ends of all the blades of the moving vane fan near the air outlet are connected by a wind blocking ring.

[0015] Compared with the prior art, the fan module is a turbo fan assembly arranged downstream of the air outlet, the gas flow direction of the turbo fan is parallel to the rotating shaft, the turbo fan can output larger air volume in smaller space occupation, the volume of the entire air supply system can be reduced by about 40% compared with the traditional structure, the turbo fan is easy to apply and arrange, the air inlet area of the turbo fan is large, the flow resistance loss in the working process is small, the air supply efficiency is improved, and the risk of low-frequency booming noise is effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 Figure 1 is a schematic diagram of the three-dimensional structure of the embodiment one of the utility model in the full return air mode;

[0017] Figure 2 (a) is a first schematic diagram of the three-dimensional structure of the new return air flow path control module in the utility model;

[0018] Figure 2 (b) is a second schematic diagram of the three-dimensional structure of the new return air flow path control module in the utility model;

[0019] Figure 3 Figure 3 is a schematic diagram of the three-dimensional structure of the rotating damper in the embodiment one of the utility model;

[0020] Figure 4 Figure 4 is a schematic diagram of the exploded structure of the embodiment one of the utility model;

[0021] Figure 5 Figure 5 is a schematic diagram of the three-dimensional structure of the new return air flow path control module and the rotating damper in the embodiment one of the utility model in the full return air mode;

[0022] Figure 6 Figure 6 is a schematic diagram of the three-dimensional structure of the embodiment one of the utility model in the full fresh air mode;

[0023] Figure 7 Figure 7 is a schematic diagram of the three-dimensional structure of the new return air flow path control module and the rotating damper in the embodiment one of the utility model in the full fresh air mode;

[0024] Figure 8 Figure 8 is a schematic diagram of the three-dimensional structure of the embodiment one of the utility model in the new return air mixed mode;

[0025] Figure 9 Figure 9 is a schematic diagram of the three-dimensional structure of the new return air flow path control module and the rotating damper in the embodiment one of the utility model in the new return air mixed mode;

[0026] Figure 10 Figure 2 is a three-dimensional structural schematic diagram of the new return air flow path control module and the rotary damper in cooperation with the full return air mode of the second embodiment of the present application;

[0027] Figure 11 Figure 3 is a three-dimensional structural schematic diagram of the new return air flow path control module and the rotary damper in cooperation with the full fresh air mode of the second embodiment of the present application;

[0028] Figure 12 Figure 4 is a three-dimensional structural schematic diagram of the new return air flow path control module and the rotary damper in cooperation with the new return air mixed mode of the second embodiment of the present application;

[0029] Figure 13 Figure 5 is a three-dimensional structural schematic diagram of the rotary damper in the second embodiment of the present application. DETAILED DESCRIPTION

[0030] The present application will be further described in detail below with reference to the embodiments of the drawings.

[0031] Embodiment 1: As shown in the figure, a kind of air supply system of automobile air conditioner, including new return air flow path control module 1 and fan module 2, new return air flow path control module 1 has two air inlets and one air outlet 11, two air inlets are respectively new air inlet 12 for being connected with the space outside vehicle and return air inlet 13 for being connected with the space inside vehicle, rotatable installation is in new return air flow path control module 1 with rotary damper 3, the rotation center axis of rotary damper 3 is parallel with the gas main flow path direction of air outlet 11, the rotation of rotary damper 3 is used to realize the switching of full fresh air mode that only new air inlet 12 is connected with air outlet 11, full return air mode that only return air inlet 13 is connected with air outlet 11 and new return air mixed mode that new air inlet 12 and return air inlet 13 are all connected with air outlet 11, fan module 2 includes the turbine fan assembly of being arranged in the downstream of air outlet 11.

[0032] Preferably, the turbine fan assembly includes at least one group of turbine fan unit stages 20, which is composed of a stationary blade fan 202 and a rotating blade fan 201 arranged coaxially. Among them, the blades of the stationary blade fan 202 are fixed and non-rotating stationary blades, and the blades of the rotating blade fan 201 are rotating blades rotating around the shaft of the fan. The center of the rotating blade fan 201 is provided with a layout space for arranging a motor for driving the rotating blades to rotate. All the blades in each fan are arranged in a uniform radiation mode from the center of the fan shaft to the surrounding. The rotating blade fan 201 is responsible for accelerating the airflow, and the stationary blade fan 202 is responsible for guiding the airflow to adapt to the demand of the subsequent parts for the airflow flow field, so that the outflow direction of the main airflow is parallel to the shaft of the fan.

[0033] Preferably, in a turbofan unit stage 20: the moving blade fan 201 and the static blade fan 202 are arranged in sequence along the gas main flow direction of the air outlet 11; in the combination of multiple turbofan unit stages 20: all moving blade fans 201 and static blade fans 202 are coaxial, and a static blade fan 202 is arranged between two moving blade fans 201. According to different use requirements, one turbofan unit stage 20 or a combination of multiple turbofan unit stages 20 can be selected. When multiple turbofan unit stages 20 are used in combination, the air volume can be increased by working in relay, and when a larger pressure head is required, the use of multiple stages can effectively reduce the load of each blade and improve the stability of the fan operation.

[0034] Preferably, the rotating damper 3 includes a rotating shaft 31, the central axis of the rotating shaft 31 is parallel to the gas main flow direction of the air outlet 11, and the plane where the central axis of the rotating shaft 31 is located is taken as a boundary to separate the area around the side of the rotating shaft 31 into an open area 32 and a closed area 33. The closed area 33 is provided with a damper baffle 30 fixedly connected with the rotating shaft 31, and the rotating damper 3 is driven to rotate by the rotating shaft 31 to change the position of the damper baffle 30, thereby realizing the switching of the three modes: the full fresh air mode in which only the fresh air outlet 12 is connected with the air outlet 11, the full return air mode in which only the return air outlet 13 is connected with the air outlet 11, and the new return air mixed mode in which the fresh air outlet 12 and the return air outlet 13 are both connected with the air outlet 11. The structure is simple, and the positions of the fresh air outlet 12 and the return air outlet 13 are designed according to the specific structure of the rotating damper 3 to realize stable switching of the above three modes.

[0035] Preferably, the rotating shaft 31 is driven by an actuator (not shown in the figure), and the rotating damper 3 has a mounting space 300 for mounting the actuator.

[0036] 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 finally discharged air is cleaner and more healthy.

[0037] In addition, according to the use requirements, corresponding baffles can be arranged in the fresh air outlet 12 or the return air outlet 13 to form multiple different airflow channels.

[0038] In this embodiment, two turbofan unit stages 20 are used in combination, that is, a double-stage turbofan. Compared with a single stage, the required pressure head cannot be overcome, and the space required for three or more stages is large, and the feasibility is not high. Therefore, the combination of two unit stages is the most suitable way. The two turbofan unit stages 20 are arranged in sequence as a first moving blade fan 201, a first static blade fan 202, a second moving blade fan 201, and a second static blade fan 202.

[0039] In the new air mode, the rotary damper 3 is driven by the actuator, the return air inlet 13 is fully blocked by the damper baffle 30, the air flow enters the open area 32 of the rotary damper 3 from the new air inlet 12, then the air flow flows out of the air outlet 11, after being filtered by the filter assembly 4, enters the primary moving blade fan 201, is accelerated by the rotation of the primary moving blade, enters the primary static blade fan 202, the air flow direction is corrected by the primary static blade, then the air flow enters the secondary moving blade fan 201, is accelerated again by the rotation of the secondary moving blade, then enters the secondary static blade fan 202, the air flow direction is corrected by the secondary static blade, and then flows out of the air supply system and enters the subsequent mechanism of the automobile air conditioner;

[0040] In the full return air mode, the rotary damper 3 is driven by the actuator, the new air inlet 12 is fully blocked by the damper baffle 30, the air flow enters the open area 32 of the rotary damper 3 from the return air inlet 13, and the subsequent is the same as the new air mode described above.

[0041] In the new air and return air mixed mode, the rotary damper 3 is driven by the actuator, the new air inlet 12 and part of the return air are blocked by the damper baffle 30, the air flow enters the open area 32 of the rotary damper 3, and the subsequent is the same as the new air mode.

[0042] Example two: other parts are the same as example one, the difference is that the open area 32 is provided with an inlet partition plate 35 for forming a multi-layer flow shape. According to the number of inlet partition plates 35, a double-layer flow shape or a multi-layer flow shape is realized, which is used to reduce the heating energy consumption of the automobile air conditioner. In this way, according to different use requirements, on the basis of using the same new return air flow control module 1, only by replacing the rotary damper 3 without the inlet partition plate 35 or the rotary damper 3 with the inlet partition plate 35, the switching of the single-layer flow shape, the double-layer flow shape or the multi-layer flow shape air supply mode can be realized, and the difference between the double-layer flow shape and the multi-layer flow shape is the number of partition plates, and the manufacturing of the rotary damper 3 is also relatively simple. The rotary damper 3 with the partition plate only needs to be slightly modified on the basis of the original rotary damper 3 without the partition plate, which greatly reduces the production cost.

[0043] In the specific embodiment, an inlet baffle 35 is arranged in the open area 32, and a corresponding outlet baffle (not shown in the figure) is arranged at the outlet of the turbo-fan, so that a double-layer flow form of air supply can be realized. The actuator drives the rotary damper 3 to the corresponding position, so that the air flow enters the open area 32 of the rotary damper 3 from the fresh air inlet 12 or the return air inlet 13 or the mixture of the fresh air inlet 12 and the return air inlet 13. Due to the existence of the inlet baffle 35 and the outlet baffle, the air flows on both sides will not interfere with each other, and then flow out of the rotary damper 3 and enter the first moving blade fan 201. Due to the working characteristics of the turbo-fan, there is a certain phase difference between the air flow at the inlet of the first moving blade fan 201 and the air flow at the outlet of the second static blade fan 202, so that the double-layer flow form of air supply can be adjusted according to the angle of the baffle.

[0044] Embodiment three: other parts are the same as embodiment one or two, and the difference is that the filter assembly 4 for filtering the air flow is arranged at the air outlet of the turbo-fan assembly.

[0045] Embodiment four: other parts are the same as embodiment one or two or three, and the difference is that the outer ends of all the blades of the moving blade fan 201 are connected by a baffle ring, which is arranged in 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 with the rotating shaft of the fan, and the other end is connected with the baffle ring, so as to improve the overall strength and reduce the backflow. A certain gap is left between the baffle ring and the outer shell of the fan, so as to facilitate the rotation of the blade. One end of the blade of the static blade fan 202 is connected with the outer shell of the fan, and the other end is connected with the stator of the motor of the fan or is suspended and has a certain gap with the rotor of the motor of the fan, so that it does not participate in rotation.

[0046] Embodiment five: other parts are the same as embodiment one or two or three or four, and the difference is that guide vanes or air flow rectifying devices can be added near the moving blade fan 201 and before the air outlet 11, so that the air flow from the air outlet 11 can enter the first moving blade fan 201 at the optimal angle.

Claims

1. An air supply system of an automobile air conditioner, comprising a fresh return air flow path control module and a fan module, the fresh return air flow path control module having two air inlets and one air outlet, the two air inlets being a fresh air inlet for communicating with a space outside a vehicle and a return air inlet for communicating with a space inside the vehicle, respectively, and a rotary damper being rotatably installed in the fresh return air flow path control module, a rotation center axis of the rotary damper being parallel to a main air flow path direction of the air outlet, and the rotary damper being used to switch a full fresh air mode in which only the fresh air inlet communicates with the air outlet, a full return air mode in which only the return air inlet communicates with the air outlet, and a fresh return air mixed mode in which both the fresh air inlet and the return air inlet communicate with the air outlet by rotation of the rotary damper, characterized in that The fan module comprises a turbine fan assembly arranged downstream of the air outlet.

2. The air supply system of an automobile air conditioner according to claim 1, wherein The turbine fan assembly comprises at least one set of turbine fan unit stages, each turbine fan unit stage comprising a static fan and a dynamic fan arranged coaxially.

3. The air supply system of an automobile air conditioner according to claim 2, wherein In one turbine fan unit stage, the dynamic fan and the static fan are arranged in sequence along the direction of the main gas flow path of the air outlet; in a plurality of turbine fan unit stages, all the dynamic fans and the static fans are coaxial, and a static fan is arranged between two dynamic fans.

4. The air supply system of an automobile air conditioner according to claim 1, wherein The rotating damper comprises a rotating shaft, the central axis of the rotating shaft is parallel to the direction of the main gas flow path of the air outlet, and the area around the side of the rotating shaft is divided into an open area and a closed area by a plane containing the central axis of the rotating shaft; the closed area is provided with a damper baffle fixedly connected to the rotating shaft, and the damper baffle changes position by rotating with the rotating shaft to switch between a full 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 fresh 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 an automobile air conditioner according to claim 4, wherein The open area is provided with an inlet partition plate for forming a multi-layer flow shape.

6. The air supply system of an automobile air conditioner according to claim 4, wherein The rotating shaft is driven by an actuator, and the rotating damper has a mounting space for mounting the actuator.

7. The air supply system of an automobile air conditioner according to claim 1, wherein A filter assembly for filtering the airflow is detachably connected between the air outlet and the turbine fan assembly.

8. The air supply system of an automobile air conditioner according to claim 1, wherein The air outlet of the turbine fan assembly is provided with a filter assembly for filtering the airflow.

9. The air supply system of an automobile air conditioner according to claim 2, wherein The outer ends of all the blades of the dynamic fan are connected by a wind shield.

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