Air inlet guiding device for improving inside and outside air inlet fleeing of automobile air conditioner

Abstract

The utility model relates to an air inlet guiding device for improving inside and outside air inlet fleeing of an automobile air conditioner. The air inlet guiding device comprises an air door body and an air inlet guiding grating. One end of the air door body is rotationally connected with an air conditioner unit shell through a connecting shaft. An outer air inlet side and an inner air inlet side are arranged on the air conditioner unit shell and located on the two sides of the air door body respectively. The air inlet guide grating is fixedly arranged in the air conditioner unit shell and located between the shaft far end of the air door body and the air door near end of the air filter element. The side, close to the air door, of the air inlet guide grille adopts an arc face with the connecting shaft center of the air door body as the center, the arc face is located on the outer side of the motion trail face of the far-shaft end of the air door body, and a gap is reserved between the two faces. A plurality of air guide partition plates extending in the radial direction are arranged on the air inlet guide grating with the center of a connecting shaft of the air door body as the center in the circumferential direction, the shaft-close ends of the air guide partition plates extend to the arc face, and the shaft-far ends of the air guide partition plates extend to the positions close to or making contact with the air door-close ends of the air filter elements. The device avoids the problem of air channeling under the state that internal air and external air are mixed.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile air conditioners, and in particular relates to an air intake guide device for improving the air intake crossflow between the inside and outside of an automobile air conditioner. Background Art

[0002] In automotive air conditioning units, an air filter is typically located between the air outlet of the unit housing and the air inlet of the blower to filter the air. A damper body is installed within the unit housing to control the connection between the inner and outer air intake ducts within the unit housing. Specifically, the damper swings to control the opening and closing of either the outer or inner air intake duct.

[0003] As the internal circulation and external circulation modes are switched, the air intake channel of the air conditioner realizes the switch between internal and external air intake. To achieve this purpose, the damper body plays an important role.

[0004] The existing damper body is mainly composed of the damper body and a connecting shaft arranged at one end of the damper body. The damper body is connected to the damper drive motor and can be rotatably supported at a set position in the air-conditioning unit shell through the connecting shaft. When the damper body is at the extreme positions on both sides, the damper circular shaft end is in sealing contact with the blower and the inner wall of the shell, which can realize the isolation of the internal and external air ducts and realize separate external and internal air intake; but when the car air conditioner is switched to the mixed air state, that is, when the internal and external air are taken in at the same time, there is a gap between the distal end of the damper body and the proximal end (the flat end) of the air filter element, which makes it impossible to completely isolate the internal and external air ducts. There is a certain "air crosstalk 6" problem. The internal and external air do not all flow through the blower, and some gas flows back through the internal air channel. See Figure 9 , reducing ride comfort. Utility Model Content

[0005] Aiming at the deficiencies of the prior art, the utility model provides an air intake guide device for improving the crossflow of air intake between the inside and outside of an automobile air conditioner.

[0006] The above-mentioned purpose of the utility model is achieved through the following technical solutions:

[0007] The ventilator is connected to the air intake duct of the air conditioner in an outer circle, and the ventilator is connected to the air intake duct of the air conditioner in an outer circle by the ventilator.

[0008] When the damper body rotates to the maximum limit position of the external circulation mode, it forms a sealing fit with the inner air inlet of the air-conditioning unit shell, so that the inner air inlet is closed; when the damper body rotates to the maximum limit position of the internal circulation mode, it forms a sealing fit with the outer air inlet of the air-conditioning unit shell, so that the outer air inlet is closed; when the damper body rotates to a position between the two extreme positions, the damper body is radially aligned with one of the air guide baffles on the air intake guide grille, and the wind-shielding length of the damper body is extended to the end face of the air filter element near the damper end through the air guide baffle.

[0009] Moreover, the air intake guide grille adopts an integral injection molding structure and is fixedly connected to the air outlet edge of the air conditioning unit shell, or the air intake guide grille is integrally molded at the air outlet position of the air conditioning unit shell.

[0010] Furthermore, the air intake guide grille is composed of a plurality of arc-shaped ribs arranged in parallel along the axial direction of the connecting shaft and a plurality of air guide baffles perpendicularly connecting the arc-shaped ribs. Air holes are formed between adjacent arc-shaped ribs and adjacent air guide baffles.

[0011] Moreover, the gap between the arc surface of the air intake guide grille and the motion track surface of the distal end of the damper body is 0.5 mm to 3.5 mm.

[0012] The advantages and positive effects of the utility model are:

[0013] 1. The utility model adds an air intake guide grille between the damper body and the air filter element. The air intake side of the guide grille is configured in an arc shape centered on the damper body's rotation center and fits with the distal end of the damper body with a small gap, ensuring the normal rotation of the damper body. Furthermore, air guide baffles are provided at multiple locations along the damper body's rotation center in a radial direction. This ensures that when mixed internal and external air is input, the damper body and the air guide baffles are aligned. The air guide baffles extend the wind shielding length to the end face of the air filter element, thereby providing a certain degree of resistance to cross-flow at locations where the internal and external air passages are not tightly sealed, thereby reducing the amount of cross-flow and ultimately preventing internal air backflow, allowing both internal and external air to flow toward the blower.

[0014] 2. The air intake guide grille of the present invention is composed of a plurality of arc-shaped rib plates arranged parallel to the axial direction of the connecting shaft and a plurality of air guide partitions perpendicularly connecting the arc-shaped plates. The two together form a mesh structure of the grille to ensure the strength of the structure.

[0015] 3. The air inlet guide structure has the advantages of small overall structure volume, low wind resistance, simple structure, low cost and obvious improvement effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a side view of the air intake guide device of the utility model;

[0017] Figure 2 It is a side view of the air intake guide device of the utility model;

[0018] Figure 3 It is a three-dimensional diagram of the air intake guide device of the utility model;

[0019] Figure 4 This is a reference diagram of the use state of the air intake guide device of the utility model in the external air intake state;

[0020] Figure 5 This is a reference diagram of the use state of the air intake guide device of the utility model in the internal air intake state;

[0021] Figure 6 This is a reference diagram of the use state of the air intake guide device of the utility model in the state of internal and external mixed air intake;

[0022] Figure 7 This is the air flow simulation analysis result based on STAR-CCM+ when no air intake grille is installed (inside and outside mixed air intake state);

[0023] Figure 8 This is the result of the air flow simulation analysis based on STAR-CCM+ when the utility model is equipped with an additional air intake guide grille (under the internal air mixed intake state).

[0024] Figure 9 It is a structural diagram of an existing automobile air conditioning unit. DETAILED DESCRIPTION

[0025] The structure of the present invention will be further described below with reference to the accompanying drawings and through examples. It should be noted that the present examples are descriptive rather than restrictive.

[0026] An air intake guide device to improve the air flow between the inside and outside of the automobile air conditioner, see Figures 1-8 . It includes a damper body 2 and an air intake guide grille 3. The damper body is a plate-like structure, and a connecting shaft 1 is provided at one end of the damper body, which is rotatably connected to the air-conditioning unit shell through the connecting shaft. The function of the connecting shaft is: one end forms a rotatable connection with the air-conditioning unit shell, and the other end forms a drive link with the damper motor. The two sides of the damper body on the air-conditioning unit shell are respectively the external air intake side and the internal air intake side. The external air intake side refers to the side that is used to connect and control the external circulation air intake channel after the damper body is installed in the air-conditioning unit; and the internal air intake side refers to the side that is used to connect and control the internal circulation air intake channel. A circle of sponge pads is respectively pasted on the edges of both sides of the damper body, and the sponge pads play a sealing role. When the damper body rotates to the maximum limit position of the external circulation mode, it forms a sealing fit with the internal air inlet of the air-conditioning unit shell, so that the internal air inlet is closed, see. Figure 4 When the damper body rotates to the maximum limit position of the internal circulation mode, it forms a seal with the external air inlet of the air conditioning unit shell, so that the external air inlet is closed. Figure 5 When the damper body rotates to a position between the two extreme positions, forming a mixed state of internal and external circulation, the damper body cooperates with the air intake guide grille to prevent the external air duct from flowing into the internal air duct and avoid backflow through the internal air duct. Figure 6 The location and specific structure of the air intake guide grille are as follows:

[0027] The air intake guide grille is arranged in the air conditioning unit shell between the distal end of the damper body and the proximal end of the air filter element 4. The air filter element filters the gas to be introduced into the blower 5. The air intake guide grille can be an integral injection molding structure and fixedly connected to the air outlet edge of the air conditioning unit shell. The air intake guide grille can be integrally molded at the air outlet position of the air conditioning unit shell. The proximal side of the air intake guide grille adopts an arc surface centered on the center of the connecting axis of the damper body. The arc surface is located outside the motion trajectory surface of the distal end of the damper body, and a gap is left between the two surfaces. The smaller the gap is, the better without affecting the smooth rotation of the damper body. In the present utility model, the gap between the two surfaces is preferably: 0.5mm-3.5mm. The air intake guide grille is provided with a plurality of radially extending air guide baffles along the circumferential direction with the center of the connecting axis of the air door body as the center. The proximal axial end of the air guide baffle extends to the arc surface of the air intake guide grille, and the distal axial end of the air guide baffle extends to a position close to or in contact with the proximal air door end of the air filter element.

[0028] In the present invention, the air intake guide grille is composed of multiple curved ribs 3.1 arranged parallel to the axis of the connecting shaft and multiple air guide baffles 3.2 perpendicularly connecting the curved ribs. Adjacent curved ribs and adjacent air guide baffles form air holes for the incoming air to pass through.

[0029] The setting positions of the above-mentioned multiple air guide baffles are related to the actual setting of the mixed air ratio of the internal and external winds of the air conditioning system. Specifically, in the implementation of the present utility model, the mixed air ratio of the internal and external winds is set according to five gears of 0%-20%-40%-60%-80%-100%, and the corresponding positions of the multiple air guide baffles correspond to the damper angles of 0°-10°-26°-52°-76°-90°.

[0030] Among them, 0° corresponds to 0% internal energy state, and 90° corresponds to 100% internal energy state.

[0031] By arranging an air intake guide grille between the damper body and the air filter element, when the automobile air conditioner requires a mixed state of internal and external circulation, the damper body is radially aligned with one of the air guide baffles on the air intake guide grille, and the air guide and wind shielding length is extended to the end face of the air filter element through the air guide baffle, thereby avoiding the problem of wind blowby caused by the gap between the distal end of the damper body and the proximal damper end of the air filter element.

[0032] The wind direction simulation of the automobile air conditioner is based on the following two conditions: no air intake guide grille is set in the air conditioner unit shell, and the air intake guide grille is set. Figure 7 and Figure 8From the comparison of the two figures, when the air intake guide grille is not set, obvious internal air backflow can be seen, while when the air intake guide grille is set, it can be seen that both the internal and external air flows to the blower, and no internal air backflow is found.

[0033] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will understand that various replacements, changes and modifications are possible without departing from the spirit of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. An air intake guide device for improving the blowby of air inside and outside the automobile air conditioner, characterized by: The vent body is provided with a connecting shaft at one end of the vent body, which is rotatably connected to the air-conditioning unit housing through the connecting shaft; the two sides of the vent body on the air-conditioning unit housing are respectively an outer air intake side and an inner air intake side; the air intake guide grille is fixedly arranged in the air-conditioning unit housing and is located between the distal end of the vent body and the proximal air door end of the air filter element; the proximal air door side of the air intake guide grille adopts an arc surface with the center of the connecting shaft of the vent body as the center, and the arc surface is located outside the motion trajectory surface of the distal end of the vent body, and a gap is left between the two surfaces; the air intake guide grille is provided with a plurality of radially extending air guide baffles in a circumferential direction with the center of the connecting shaft of the vent body as the center, the proximal end of the air guide baffle extends to the arc surface of the air intake guide grille, and the distal end of the air guide baffle extends to a position close to or in contact with the proximal air door end of the air filter element; When the damper body rotates to the maximum limit position of the external circulation mode, it forms a sealing fit with the inner air inlet of the air-conditioning unit shell, so that the inner air inlet is closed; when the damper body rotates to the maximum limit position of the internal circulation mode, it forms a sealing fit with the outer air inlet of the air-conditioning unit shell, so that the outer air inlet is closed; when the damper body rotates to a position between the two extreme positions, the damper body is radially aligned with one of the air guide baffles on the air intake guide grille, and the wind-shielding length of the damper body is extended to the end face of the air filter element near the damper end through the air guide baffle.

2. The air intake guide device for improving crossflow between the internal and external air intakes of an automobile air conditioner according to claim 1, characterized in that: The air intake guide grille adopts an integral injection molding structure and is fixedly connected to the air outlet edge of the air conditioning unit shell, or the air intake guide grille is integrally molded at the air outlet position of the air conditioning unit shell.

3. The air intake guide device for improving the crossflow of air between the inside and outside of an automobile air conditioner according to claim 1 is characterized in that: The air intake guide grille is composed of a plurality of arc-shaped ribs arranged in parallel along the axial direction of the connecting shaft and a plurality of air guide baffles vertically connecting the arc-shaped ribs; air holes are formed between adjacent arc-shaped ribs and adjacent air guide baffles.

4. The air intake guide device for improving crossflow between internal and external air intake of an automobile air conditioner according to claim 1, characterized in that: The gap between the arc surface of the air intake guide grille and the motion track surface of the distal end of the damper body is 0.5 mm to 3.5 mm.

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