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

Abstract

The invention relates to an air inlet guiding device for improving inside and outside air inlet channeling 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 invention 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 inside and outside of an automobile air conditioner. Background Art

[0002] In the automobile air conditioning unit, an air filter is generally provided between the air outlet of the air conditioning unit housing and the air inlet of the blower to filter the gas. A damper body is installed in the air conditioning unit housing, and the damper body is used to form a connection control of the inner and outer air intake channels in the air conditioning unit housing. The specific function is to control the opening and closing of the outer air intake channel or the inner air intake channel through the swing of the damper.

[0003] With the switching between the internal circulation and external circulation modes, the air inlet channel of the air conditioner realizes the switching between the internal air intake and the external air intake. To achieve this purpose, the damper body plays an important role in it.

[0004] The existing damper body is mainly composed of a 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 circular shaft end of the damper is in sealing contact with the blower and the inner wall of the shell, which can achieve isolation of the internal and external air ducts and realize separate external and internal air intake; but when the automobile air conditioner is switched to the mixed air state, that is, when the internal and external air intake are carried out at the same time, at this 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, resulting in the inability to completely isolate the internal and external air ducts, and there is a certain "air crosstalk 6" problem. The internal and external air do not all flow through the blower, and part of the gas flows back through the internal air channel, see Fig. 9 , reducing ride comfort. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides an air intake guide device for improving the air intake crossflow between the inside and outside of an automobile air conditioner.

[0006] The above-mentioned object of the present invention is achieved by the following technical solutions:

[0007] An air intake guide device for improving the air flow between the inside and outside of an automobile air conditioner comprises a damper body and an air intake guide grille; the damper body is in a plate-like structure, a connecting shaft is arranged at one end of the damper body, and the damper body is rotatably connected to an air conditioning unit housing through the connecting shaft; the two sides of the damper 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 axis end of the damper body and the near damper end of an air filter element; the near damper end of the air intake guide grille adopts an arc surface with the center of the connecting shaft of the damper body as the center, and the arc surface is located outside the motion trajectory surface of the distal axis end of the damper body, and a gap is left between the two surfaces; a plurality of radially extending air guide baffles are arranged on the air intake guide grille along the circumferential direction with the center of the connecting shaft of the damper body as the center, the near axis end of the air guide baffle extends to the arc surface of the air intake guide grille, and the distal axis end of the air guide baffle extends to a position close to or in contact with the near damper end of the air filter element;

[0008] When the damper body rotates to the maximum limit position of the external circulation mode, a sealing fit is formed 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, a sealing fit is formed 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 extreme positions on both sides, 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] Furthermore, 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 rib plates arranged in parallel along the axial direction of the connecting shaft and a plurality of air guide baffles vertically connecting the arc-shaped rib plates. Air holes are formed between adjacent arc-shaped rib plates 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 0.5mm-3.5mm.

[0012] The advantages and positive effects of the present invention are:

[0013] 1. The present invention adds an air intake guide grille between the damper body and the air filter element. The air intake side of the guide grille is set to be an arc shape with the rotation center of the damper body as the center, and cooperates with the distal end of the damper body with a small gap to ensure the normal rotation of the damper body. In addition, air guide baffles are set at multiple positions along the radial direction of the rotation center of the damper body on the damper body, so that the damper body is aligned with the air guide baffle when the internal and external air are mixed and input. The air guide baffle is used to extend the wind guide and wind shielding length to the end face of the air filter element, thereby playing a certain role in blocking the air blowback at the position where the internal and external air channels are not tightly sealed, thereby reducing the air volume of the blowback, and finally achieving the effect of preventing the internal air from flowing back, so that both the internal and external air flow to the blower.

[0014] 2. The air intake guide grille of the present invention is composed of a plurality of arc-shaped rib plates arranged in parallel along the axial direction of the connecting shaft and a plurality of air guide baffles vertically connecting the arc-shaped plates, which 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 volume, low wind resistance, simple structure, low cost and obvious improvement effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a side view of the air intake guide device of the present invention;

[0017] Figure 2 is a side view of the air intake guide device of the present invention;

[0018] Figure 3 is a perspective view of the air intake guide device of the present invention;

[0019] Figure 4 This is a reference diagram of the use state of the air intake guide device of the present invention 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 present invention 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 present invention in the state of internal and external mixed air intake;

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

[0023] Figure 8 It is the result of air flow simulation analysis based on STAR-CCM+ when an air intake guide grille is added to the present invention (under the condition of internal air mixed intake).

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

[0025] The structure of the present invention is further described below with reference to the accompanying drawings and by way of 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 inside and outside the automobile air conditioner, see Figure 1-Figure 8 , including 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 driving link with the damper motor. The two sides of the damper body on the air-conditioning unit shell are respectively located on the external air intake side and the internal air intake side. The external air intake side refers to the side 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 used to connect and control the internal circulation air intake channel. A circle of sponge pads are 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 match with the internal air intake port of the air-conditioning unit shell to close the internal air intake port, see. Figure 4 When the damper body rotates to the maximum limit position of the internal circulation mode, it forms a sealing match 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 4, and the air filter 4 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 air intake guide grille proximal to the damper 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 invention, 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 connecting axis center 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 a plurality of arc-shaped ribs 3.1 arranged in parallel along the axial direction of the connecting shaft and a plurality of air guide baffles 3.2 vertically connecting the arc-shaped ribs. Air holes are formed between adjacent arc-shaped ribs and adjacent air guide baffles for air intake 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 wind of the air-conditioning system. Specifically, in the implementation of the present invention, the mixed air ratio of the internal and external wind 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°, wherein 0° corresponds to 0% internal air state, and 90° corresponds to 100% internal air state.

[0030] 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.

[0031] 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 housing, and the air intake guide grille is set. Figure 7 and Figure 8 , from the comparison of the two figures, when no air intake guide grille is set, obvious internal air reflux can be seen, while when the air intake guide grille is set, it can be seen that both the internal and external air flows flow to the blower, and no internal air reflux is found.

[0032] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, changes and modifications are possible without departing from the spirit and scope 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 air flow between the inside and outside of an automobile air conditioner, characterized in that: The air intake guide grille is a plate-shaped structure, and a connecting shaft is arranged at one end of the air intake body, which is rotatably connected to the air conditioning unit shell through the connecting shaft; the two sides of the air intake body on the air conditioning unit shell 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 shell and is located between the distal axis end of the air intake body and the proximal air intake end of the air filter element; the proximal air intake end of the air intake guide grille adopts an arc surface with the center of the connecting shaft of the air intake body as the center, and the arc surface is located outside the motion trajectory surface of the distal axis end of the air intake body, and a gap is left between the two surfaces; a plurality of radially extending air guide baffles are arranged on the air intake guide grille along the circumferential direction with the center of the connecting shaft of the air intake body as the center, the proximal axis end of the air guide baffle extends to the arc surface of the air intake guide grille, and the distal axis end of the air guide baffle extends to a position close to or in contact with the proximal air intake end of the air filter element; When the damper body rotates to the maximum limit position of the external circulation mode, a sealing fit is formed 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, a sealing fit is formed 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 extreme positions on both sides, 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 the air flow between the inside and outside of the automobile air conditioner according to claim 1 is 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 air flow between the inside and outside of the automobile air conditioner according to claim 1 is characterized in that: The air intake guide grille is composed of a plurality of arc-shaped rib plates arranged in parallel along the axial direction of the connecting shaft and a plurality of air guide baffles vertically connecting the arc-shaped plates; air holes are formed between adjacent arc-shaped rib plates and adjacent air guide baffles.

4. The air intake guide device for improving the air flow between the inside and outside of the automobile air conditioner according to claim 1 is 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 0.5mm-3.5mm.

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