Air blower of automobile air conditioner

Abstract

The utility model discloses an automobile air conditioner blower, and belongs to the technical field of automobile air conditioners. An automobile air conditioner air blower comprises a volute, a filter box, filter strips, an air blower body, a flow baffle, a buffer strip, a volute tongue and an air outlet, the filter box is in threaded connection with one side of the volute, the filter strips are arranged at the joint of the filter box and the volute, the air blower body is connected to the center of the volute through screws, the flow baffle is arranged on the upper side of the air blower body, and the buffer strip is arranged on the upper side of the flow baffle. The side, away from the filter box, of the volute is connected with an air outlet, and a volute tongue is connected to the outer side concave position of the volute. According to the air blower, the problems that the impeller in the air blower is mostly linear, and the interior of the air blower shell is also lack of enough noise reduction devices, so that air generated by the motor can be in direct contact with the air blower shell, sound waves are conducted into an automobile through the air blower, and noise is high easily are solved; and long-time working heating is easy to burn out, and the service life is not long.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile air conditioners, and more particularly to an automobile air conditioner blower. Background Art

[0002] The blower in a car air conditioner is a crucial component of the system. Its function is to blow cold air from the evaporator or hot air from the water heater into the vehicle, providing the appropriate air flow for the air conditioning system based on the temperature. A conventional blower consists of a motor, a driver, and a controller located within a housing, and an impeller located outside the housing and connected to the motor's rotating shaft. The controller is connected to the air conditioning system's sensor. Based on temperature data obtained from the sensor, the controller adjusts the motor's speed, and thus the impeller's speed, via the driver, to adjust the air flow rate and volume of the air conditioning system, thereby achieving temperature control. Currently, the impellers in commonly used blowers for car air conditioners are mostly linear, and the blower housing lacks adequate noise reduction features. This allows the air generated by the motor to directly contact the blower housing, transmitting sound waves through the blower into the vehicle interior, which can easily cause noise and other issues. Furthermore, the motor within the blower can easily burn out due to the heat generated by prolonged operation, resulting in a short service life. Utility Model Content

[0003] The purpose of the present utility model is to provide an automobile air-conditioning blower to solve the problems raised in the above-mentioned background technology: the unreasonable structural design of the automobile air-conditioning blower leads to loud noise, and the motor inside the blower is easily burned out due to heat generated during long-term operation and has a short service life.

[0004] A car air-conditioning blower includes a volute, a filter box, a filter strip, a blower, a baffle, a buffer strip, a volute tongue, and an air outlet. The filter box is threadedly connected to one side of the volute. Several filter strips are provided at the connection between the filter box and the volute. The filter strips are in the shape of long strips inclined upward. The blower is connected to the blower with a central screw of the volute. A baffle is provided on the upper side of the blower. A buffer strip is provided on the upper side of the baffle. The side of the volute away from the filter box is connected to the air outlet. The volute is connected to the volute tongue at the recess on the outer side of the volute. Part of the gas can be placed through the volute tongue to circulate inside the volute.

[0005] Preferably, the baffle separates the airflow in the volute into two streams, thereby changing the wind speed distribution flowing into the air outlet. The baffle divides the wind into two streams. The wind passing above the baffle will directly contact the buffer strip, and the wind speed will be slowed down by the buffer strip to reduce noise. The wind passing below the baffle will move along the direction of the baffle. When the wind contacts the baffle, it will be affected by the resistance and the wind speed will decrease, thereby reducing noise.

[0006] Preferably, the blower includes a support, a plurality of blades are equidistantly arranged in a ring on the upper surface of the support, a connecting ring is fixedly connected above the blades, an impeller is arranged in the center of the upper surface of the support, the impeller is fixedly connected to the rotating shaft, the rotating shaft is connected to a motor, a flange cover is provided on the outside of the motor, the motor is pressed and fixed in the base by the flange cover and the base, the flange cover is threadedly connected to the base, an upper annular shock-absorbing ring is provided between the upper end of the motor and the flange cover, a lower annular shock-absorbing ring is provided between the lower end of the motor and the base, and a fixed seat is threadedly connected to the lower end of the base.

[0007] Preferably, the blades are of a wavy structure, and noise reduction fins are provided between any two blades. The noise reduction fins are of a triangular structure. The wind speed can be slowed down by the noise reduction fins. The blades are wavy, and the wavy blades will continuously dissipate sound wave energy due to diffuse reflection between the peaks and troughs, thereby effectively reducing noise.

[0008] Preferably, the upper end of the noise reduction fin is fixedly connected to the connecting ring, and the lower end of the noise reduction fin is fixedly connected to the blade. Fixing the noise reduction fin to the blade and the connecting ring can reduce the noise of the wind while generating wind without affecting the wind force.

[0009] Preferably, heat dissipation holes are provided on the flange cover and the impeller, and circular heat dissipation points are equidistantly provided in an annular shape at the lower end of the base. The heat generated by the motor working for a long time can be transferred to the heat dissipation points through the heat dissipation points, thereby reducing the impact of motor overheating on the motor.

[0010] Preferably, the motor is suspended in the inner cavity of the base under the support of the upper annular shock-absorbing ring and the lower annular shock-absorbing ring. The motor and the upper annular shock-absorbing ring and the lower annular shock-absorbing ring are provided with annular shaft necks for positioning the motor. By providing the shock-absorbing ring, the motor can be fixed inside the base while heat dissipation ports are left at both ends to facilitate heat dissipation of the motor.

[0011] Preferably, the lower end of the fixing seat is provided with annular equidistant grooves with heat dissipation openings.

[0012] Compared with the prior art, the advantages of the present invention are:

[0013] (1) In the present invention, the blades are changed from the original straight structure to a wave-shaped structure evenly distributed around the motor, so that the side wall surface or the top annular surface of the blades presents alternately arranged crests and troughs. When the noise passes through the rough wavy blades, the sound wave energy will be continuously dissipated due to diffuse reflection between the crests and troughs and the sound wave energy will be transmitted to the shaft hole, so that the noise generated by the rotation of the turbine is reduced by multiple diffuse reflections on the wavy blades, thereby achieving the purpose of noise reduction and silencing. At the same time, a volute tongue is provided on the outside of the volute to place part of the gas in the volute for circulation. When the airflow at the outlet of the rotating impeller blade channel passes near the volute tongue, the volute tongue divides them into two: most of the airflow flows along the channel to the outlet of the fan; a small part of the airflow flows back to the volute through the gap between the volute tongue and the impeller, and returns to the volute tongue to participate in new diversion after rotating with the impeller for one circle in the volute, thereby effectively reducing the noise.

[0014] (2) The utility model provides heat sinks and circular heat dissipation points on the outside of the base, so that the motor in the base can dissipate heat in time, thereby improving the service life of the blower.

[0015] (3) The utility model suspends the motor in the inner cavity of the base through upper and lower annular vibration-damping rubber rings. The motor does not directly contact the base. The vibration of the motor is attenuated by the vibration-damping rubber rings and then transmitted to the base, thereby greatly reducing the vibration of the base, avoiding resonance, and eliminating the problem of easy damage to the base connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This is a schematic structural diagram of the blower of the present utility model;

[0018] Figure 3 is a cross-sectional view of the blower of the present utility model;

[0019] Explanation of the numbers in the figure: 1. Volute; 2. Filter box; 3. Filter strip; 4. Blower; 41. Connecting ring; 42. Blade; 43. Noise reduction fin; 44. Impeller; 45. Rotating shaft; 46. Fixed seat; 47. Heat dissipation hole; 48. Base; 49. Support; 51. Upper annular shock-absorbing ring; 52. Lower annular shock-absorbing ring; 53. Annular shaft neck; 54. Heat dissipation point; 55. Flange cover; 56. Motor; 57. Heat dissipation port; 5. Baffle; 6. Buffer strip; 7. Volute tongue; 8. Air outlet. DETAILED DESCRIPTION

[0020] Example: See Figure 1A car air-conditioning blower includes a volute 1, a filter box 2 is threadedly connected to one side of the volute 1, a plurality of filter strips 3 are provided at the connection between the filter box 2 and the volute 1, and the filter strips 3 are in the shape of long strips inclined upward. A blower 4 is connected to the central screw of the volute 1, and a baffle 5 is provided on the upper side of the blower 4.

[0021] When in use, the baffle 5 divides the airflow in the volute 1 into two streams, thereby changing the wind speed distribution flowing into the air outlet 8. A buffer strip 6 is provided on the upper side of the baffle 5. The air outlet 8 is connected to the side of the volute 1 away from the filter box 2, and a volute tongue 7 is connected to the concave part of the outer side of the volute 1.

[0022] Specifically, the baffle 5 divides the wind into two streams. The wind passing over the baffle 5 will directly contact the buffer strip 6. The buffer strip 6 is wavy, and the wind will repeatedly collide with the buffer strip 6. The buffer strip 6 will slow down the wind speed and reduce noise. The wind passing under the baffle 5 will move along the direction of the baffle 5. Since the starting end of the baffle 5 is at 90 degrees to the air outlet 8 of the blower 4, when the wind contacts the baffle 5, it will be affected by resistance, so that the wind speed will drop, thereby reducing noise.

[0023] See also Figure 2-3 The blower 4 includes a support 49, on the upper surface of which a plurality of blades 42 are arranged in a circular pattern at equal intervals. The blades 42 have a wave-shaped structure. A connecting ring 41 is fixedly connected above the blades 42. At the same time, a triangular noise reduction fin 43 is provided between any two blades 42. The upper end of the noise reduction fin 43 is fixedly connected to the connecting ring 41 provided at the top, and the lower end of the noise reduction fin 43 is connected to the blade 42.

[0024] In addition, an impeller 44 is provided at the center of the upper surface of the support 49, and a rotating shaft 45 is fixedly connected to the upper end of the impeller 44, and the rotating shaft 45 passes through the impeller 44, and the rotating shaft 45 is connected to the motor 56. A flange cover 55 is provided on the outside of the motor 56, and the motor 56 is pressed and fixed in the base 48 by the flange cover 55 and the base 48. The flange cover 55 is threadedly connected to the base 48, and an upper annular shock-absorbing ring 51 is provided between the upper end of the motor 56 and the flange cover 55, and a lower annular shock-absorbing ring 52 is provided between the lower end of the motor 56 and the base 48. The lower end of the base 48 is threadedly connected to the fixing seat 46, and the lower end of the fixing seat 46 is provided with a heat dissipation port 57 in an annular equidistant groove, and heat dissipation holes 47 are provided on the flange cover 55 and the impeller 44, and circular heat dissipation points 54 are arranged in an annular equidistant manner at the lower end of the base 48.

[0025] The motor 56 is suspended in the inner cavity of the base 48 under the support of the upper annular shock-absorbing ring 51 and the lower annular shock-absorbing ring 52 , and an annular shaft neck 53 for positioning the motor 56 is provided on the motor 56 and the upper annular shock-absorbing ring 51 and the lower annular shock-absorbing ring 52 .

[0026] Working principle: When in use, the volute 1 is installed inside the car dashboard. When the motor 56 is working, the rotating shaft 45 rotates, causing the impeller 44 to rotate. The rotation of the impeller 44 drives the blades 42 to rotate. Since the blades 42 are wavy and evenly distributed around the motor 56, the side wall surface or the top annular surface of the blades 42 presents alternately arranged peaks and troughs. When the noise passes through the rough wavy blades 42, the sound wave energy will be continuously dissipated due to diffuse reflection between the peaks and troughs and the sound wave energy will be transmitted to the shaft hole. As a result, the noise generated by the turbine rotation is reduced by multiple diffuse reflections on the wavy blades 42.

[0027] At the same time, the wind flow generated by the rotation of the blades 42 is divided into two streams through the volute 1. One stream directly enters the air outlet 8 from below the baffle 5, and the other stream passes through the buffer strip 6 from above the baffle 5 to the air outlet 8. The buffer strip 6 is concave and convex, which can effectively reduce noise.

[0028] In addition, the motor 56 generates heat when in operation. The heat energy forms an external cooling channel for the motor 56 through the flange cover 55 and the heat dissipation holes 47 of the impeller 44. The heat energy generated by the motor 56 is transferred to the fixing base 46 through the base 48 and dissipated through the several heat dissipation points 54 at the bottom of the fixing base 46 and the heat dissipation holes 57 around the fixing base 46.

[0029] In addition, some dust will be generated when the blower 4 is working. The dust will enter the filter box 2 under the action of the blower 4. Since an inclined filter strip 3 is provided at the connection between the filter box 2 and the volute 1, the inclined direction is above the filter box 2, so that the wind generated by the motor can easily enter the filter box 2 with dust. When the wind contacts the inner wall of the filter box 2 and moves towards the blower 4, it will contact the filter strip 3 over a large area. The filter strip 3 will absorb the dust in the wind, and most of the dust will stay in the filter box 2. The wind after dust removal will continue to flow along the wind direction inside the blower. When cleaning, you only need to clean the filter box 2.

[0030] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A car air-conditioning blower, comprising a volute (1), characterized in that: One side of the volute (1) is threadedly connected to a filter box (2), and a plurality of filter strips (3) are provided at the connection between the filter box (2) and the volute (1), and the filter strips (3) are in the shape of long strips inclined upward. The central screw of the volute (1) is connected to a blower (4), and a baffle (5) is provided on the upper side of the blower (4). A buffer strip (6) is fixedly connected to the upper side of the baffle (5). An air outlet (8) is fixedly connected to the side of the volute (1) away from the filter box (2), and a volute tongue (7) is fixedly connected to the concave portion on the outer side of the volute (1).

2. The automobile air-conditioning blower according to claim 1, characterized in that: The baffle (5) separates the airflow in the volute (1) into two streams, thereby changing the wind speed flowing to the air outlet (8).

3. The automobile air-conditioning blower according to claim 1, characterized in that: The blower (4) includes a support (49), a plurality of blades (42) are arranged in an annular manner at equal intervals on the upper surface of the support (49), a connecting ring (41) is fixedly connected above the blades (42), an impeller (44) is arranged at the center of the upper surface of the support (49), the impeller (44) is fixedly connected to the rotating shaft (45), the rotating shaft (45) is fixedly connected to the motor (56), the baffle (5) includes a flange cover (55), the motor (56) is pressed by the flange cover (55) and the base (48) and fixed in the base (48), the flange cover (55) is threadedly connected to the base (48), an upper annular shock-absorbing ring (51) is fixedly connected between the upper end of the motor (56) and the flange cover (55), a lower annular shock-absorbing ring (52) is fixedly connected to the base (48) at the lower end of the motor (56), and a fixing seat (46) is threadedly connected to the lower end of the base (48).

4. The automobile air-conditioning blower according to claim 3, characterized in that: The blades (42) are of a wave-shaped structure, and a noise reduction fin (43) is provided between any two blades (42), and the noise reduction fin (43) is of a triangular structure.

5. The automobile air-conditioning blower according to claim 4, characterized in that: The upper end of the noise reduction fin (43) is fixedly connected to the connecting ring (41), and the lower end of the noise reduction fin (43) is fixedly connected to the blade (42).

6. The automobile air-conditioning blower according to claim 3, characterized in that: Heat dissipation holes (47) are provided on the flange cover (55) and the impeller (44), and circular heat dissipation points (54) are provided at equal intervals in an annular manner on the lower end of the base (48).

7. The automobile air-conditioning blower according to claim 3, characterized in that: The motor (56) is suspended in the inner cavity of the base (48) under the support of the upper annular shock-absorbing ring (51) and the lower annular shock-absorbing ring (52), and the motor (56) is fixedly connected to the upper annular shock-absorbing ring (51) and the lower annular shock-absorbing ring (52) with an annular shaft neck (53) for positioning the motor (56).

8. The automobile air-conditioning blower according to claim 3, characterized in that: The lower end of the fixing seat (46) is provided with an annular groove with equal spacing and a heat dissipation opening (57).

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