Air conditioning device
By setting heat dissipation fins and rotating guide vanes on the outer circumference of the motor, and combining them with the tapered return hole design, the heat dissipation and vibration problems of the air conditioning device are solved, achieving more efficient motor heat dissipation and reduced vibration.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TIANJIN WANHE CHENYE ENERGY TECH CO LTD
- Filing Date
- 2022-05-23
- Publication Date
- 2026-05-12
AI Technical Summary
Existing air conditioning devices are inadequate in terms of heat dissipation and vibration reduction, especially in the low efficiency of the back pressure airflow control structure.
A heat dissipation fin and a rotating guide vane are installed on the outer circumference of the motor. Combined with the return hole design of the tapered part, the high-pressure airflow is promoted to return, which enhances the heat dissipation effect of the motor and balances the axial force.
The combined design of the heat dissipation fins and rotating guide vanes improves the motor's heat dissipation efficiency, reduces vibration, and achieves more effective airflow return and axial force balance.
Smart Images
Figure CN115930298B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the fields of air conditioning systems, air conditioners, and ventilation / air exchange technologies, and specifically to an air conditioning device. Background Technology
[0002] like Figure 1 As shown, an existing air conditioning device includes a wall-mounted / wall-mounted indoor unit. The indoor unit includes a housing, a panel, a liner, a mounting base, a heat exchanger, a centrifugal impeller, a motor, and an inlet collector. The panel is connected to the lower end of the housing, and the liner is fitted to the inner wall of the housing. The lower end of the liner is connected to the panel. A mounting base is provided on the upper end of the panel, and the mounting base has a mounting groove. The heat exchanger is installed in the mounting groove, and the other end of the heat exchanger is connected to the liner. A centrifugal impeller and an inlet collector are installed inside the housing. The motor's drive shaft is connected to a centrifugal impeller. The centrifugal impeller includes a rear cover plate, blades, and a front cover plate. An inlet collector is installed at the air inlet of the front cover plate, and the radially outer end of the inlet collector is connected to a mounting base. The rear cover plate includes a first flat plate, a conical plate, and a second flat plate connected in sequence. The motor is installed in the space formed by the top wall of the housing and the conical and second flat plates. The motor's drive shaft is connected to the second flat plate. The conical plate has multiple first return holes for back pressure airflow recirculation. However, the existing back pressure airflow control structure of indoor units still has significant shortcomings in terms of heat dissipation and vibration reduction. Summary of the Invention
[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide an air conditioning device. The heat dissipation fins can not only dissipate heat from the motor, but also work with the rotating heat dissipation fins to better promote the return flow of high-pressure airflow on the back side of the rear cover through the return hole, thereby enhancing the heat dissipation effect on the motor and effectively balancing the axial force, thereby reducing vibration.
[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:
[0005] An air conditioning device includes an indoor unit, which includes a housing (1), a panel (2), a liner (3), a mounting base (4), a heat exchanger (5), a centrifugal impeller (6), a motor (7), and an inlet collector (8). The lower end face of the housing is connected to the panel, and the inner side wall of the housing is fitted with the liner. The lower end face of the liner is connected to the panel. The upper end face of the panel is provided with a mounting base, and the mounting base is provided with a mounting groove. The heat exchanger is installed in the mounting groove, and the other end of the heat exchanger is connected to the liner. The centrifugal impeller and the motor are installed inside the housing. The drive shaft of the motor is connected to the centrifugal impeller. The centrifugal impeller includes a rear cover plate (61), blades, and a front cover plate. An inlet collector is installed at the air inlet of the cover plate. The radial outer end of the inlet collector is connected to the mounting base. The rear cover plate includes a first flat plate (62), a conical part (63), and a second flat plate (64) connected in sequence. The motor is installed in the space formed by the top wall of the housing, the conical part, and the second flat plate. The drive shaft of the motor is connected to the second flat plate. The conical part is provided with a plurality of first return holes (65). The feature is that the outer peripheral surface of the motor (7) is provided with a plurality of flow guiding heat sinks (71). The flow guiding heat sinks are inclined relative to the rotation axis of the centrifugal impeller. The side of the conical part adjacent to the motor is provided with a plurality of rotating flow guiding vanes (67, 68).
[0006] Furthermore, the second plate portion (64) is provided with one or more second return holes (66), and the rotating guide vanes (67, 68) include a first guide vane (67) and a second guide vane (68). Multiple first guide vanes and multiple second guide vanes are distributed circumferentially along the conical portion (63). The first guide vane is located radially inside the second guide vane. The lower end face of the motor (7) and the first guide vane and the second plate portion form a return accumulation cavity (Q).
[0007] Furthermore, the heat sink (71) is inclined in a straight line or in a spiral along the outer circumference of the motor, and the inclination angle of the heat sink relative to the axis of rotation is 15°-75°.
[0008] Furthermore, the connection between the first guide vane (67) and the second guide vane (68) has a minimum sealing gap with the corner of the lower end of the motor (7); and the first guide vane and the second guide vane are integrally formed, at which time the number of the first guide vane and the second guide vane are equal.
[0009] Furthermore, the connection between the first guide vane (67) and the second guide vane (68) has a minimum sealing gap with the corner of the lower end of the motor (7); and the first guide vane and the second guide vane are separately arranged, at which time the number of the first guide vane is 0.4-0.8 times the number of the second guide vane.
[0010] Furthermore, the height of the first guide vane (67) is greater than the height of the second guide vane (68), and the height of the first guide vane is 1.8-2.5 times the height of the second guide vane.
[0011] Furthermore, the plurality of heat dissipation fins (71) are evenly or non-uniformly distributed along the outer peripheral surface of the motor (7), the second heat dissipation fin (68) has the opposite tilt direction / rotation direction to the corresponding heat dissipation fin, and the first heat dissipation fin (67) has the opposite or the same tilt direction / rotation direction to the corresponding heat dissipation fin.
[0012] The present invention discloses an air conditioning system in which the heat dissipation fins, while cooling the motor, also work in conjunction with the rotating guide vanes to better promote the return flow of high-pressure airflow from the back side of the rear cover plate through the first return hole. This enhances the cooling effect on the motor, effectively balances the axial force, and reduces vibration. With the combined action of the rotating guide vanes and the heat dissipation fins, part of the high-pressure airflow from the back side of the rear cover plate returns through the first return hole, while the other part, after cooling the motor, flows into the return accumulation chamber and then returns to the impeller chamber through the second return hole. This enhances the cooling effect on the motor 7 and effectively balances the axial force, thereby reducing vibration. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of an existing indoor unit.
[0014] Figure 2 This is a schematic diagram of the indoor unit structure of the present invention;
[0015] Figure 3 This is a partially enlarged structural diagram of the indoor unit of the present invention;
[0016] Figure 4 This is a partially enlarged structural diagram of the indoor unit of the present invention.
[0017] In the diagram: 1. Casing; 2. Panel; 3. Liner; 4. Mounting base; 5. Heat exchanger; 6. Centrifugal impeller; 7. Motor; 8. Inlet collector; 61. Rear cover; 62. First flat plate; 63. Conical section; 64. Second flat plate; 65. First return hole; 66. Second return hole; 67. First guide vane; 68. Second guide vane; 71. Return accumulation chamber; 71. Guide heat sink; "→" indicates airflow direction. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0019] The present invention will now be described in further detail with reference to the accompanying drawings.
[0020] like Figure 2-4 As shown, an air conditioning device includes an indoor unit. The indoor unit includes a housing 1, a panel 2, a liner 3, a mounting base 4, a heat exchanger 5, a centrifugal impeller 6, a motor 7, and an inlet collector 8. The panel 2 is connected to the lower end face of the housing 1, and the liner 3 is attached to the inner side wall of the housing 1. The lower end face of the liner 3 is connected to the panel 2. The mounting base 4 is provided on the upper end face of the panel 2. The mounting base 4 has a mounting groove, in which the heat exchanger 5 is installed. The other end of the heat exchanger 5 is connected to the liner 3. The centrifugal impeller 6 and the motor 7 are installed inside the housing 1. The drive shaft of the motor 7 is connected to the centrifugal impeller 6. The centrifugal impeller 6 includes a rear cover plate 61, blades, and a front cover plate. An inlet collector 8 is installed at the air inlet. The radial outer end of the inlet collector 8 is connected to the mounting base 4. The rear cover plate 61 includes a first flat plate 62, a conical portion 63, and a second flat plate 64 connected in sequence. The motor 7 is installed in the space formed by the top wall of the housing 1 and the conical portion 63 and the second flat plate 64. The drive shaft of the motor 7 is connected to the second flat plate 64. The conical portion 63 is provided with a plurality of first return holes 65. The feature is that the outer peripheral surface of the motor 7 is provided with a plurality of flow guiding heat sinks 71. The flow guiding heat sinks 71 are inclined relative to the rotation axis of the centrifugal impeller 6. A plurality of rotating flow guiding vanes (67, 68) are provided on one side of the conical portion 63 adjacent to the motor 7.
[0021] An air conditioning device of the present invention has a heat dissipation fin 71 that, while dissipating heat from the motor 7, can also work with the rotating heat dissipation fins (67, 68) to better promote the return flow of the high-pressure airflow on the back side of the rear cover plate 61 through the first return hole 65, thereby enhancing the heat dissipation effect on the motor 7, effectively balancing the axial force, and thus reducing vibration.
[0022] Furthermore, the second flat plate portion 64 is provided with one or more second return holes 66, and the rotating guide vanes (67, 68) include a first guide vane 67 and a second guide vane 68. The multiple first guide vanes 67 and the multiple second guide vanes 68 are distributed circumferentially along the conical portion 63. The first guide vane 67 is located radially inside the second guide vane 68. The lower end face of the motor 7 and the first guide vane 67 and the second flat plate portion 64 form a return accumulation cavity Q.
[0023] In the indoor unit of an air conditioning device of the present invention, under the combined action of rotating guide vanes (67, 68) and heat dissipation fins 71, a portion of the high-pressure airflow on the back side of the rear cover plate 61 flows back through the first return hole 65, while the other portion dissipates heat from the motor 7 and flows into the return accumulation chamber Q, and then flows back to the impeller chamber through the second return hole 66. This enhances the heat dissipation effect on the motor 7, effectively balances the axial force, and thus reduces vibration.
[0024] Furthermore, the heat sink 71 is inclined in a straight line or in a spiral along the outer periphery of the motor 7, and the inclination angle of the heat sink 71 relative to the axis of rotation is 15°-75°.
[0025] Furthermore, the connection between the first guide vane 67 and the second guide vane 68 has a minimum sealing gap with the corner of the lower end of the motor 7; and the first guide vane 67 and the second guide vane 68 are integrally formed, in which case the number of the first guide vane 67 and the second guide vane 68 are equal; or, the first guide vane 67 and the second guide vane 68 are separately set, in which case the number of the first guide vane 67 is 0.4-0.8 times the number of the second guide vane 68. This structural design ensures that the back pressure airflow flows smoothly from the channel of the guide heat sink 71 to the return flow accumulation chamber Q and then returns to the impeller chamber through the second return flow hole 66, reducing airflow leakage / flow from the return flow accumulation chamber Q to the first return flow hole 65 side. This enhances the heat dissipation effect on the motor 7, effectively balances the axial force, and thus reduces vibration.
[0026] Furthermore, the height of the first guide vane 67 is greater than the height of the second guide vane 68, and the height of the first guide vane 67 is 1.8-2.5 times the height of the second guide vane 68.
[0027] Furthermore, multiple heat dissipation fins 71 are uniformly or non-uniformly distributed along the outer peripheral surface of the motor 7. The second heat dissipation fin 68 has the opposite tilt direction / rotation direction to the corresponding heat dissipation fin 71, and the first heat dissipation fin 67 has the opposite or the same tilt direction / rotation direction to the corresponding heat dissipation fin 71. This structural design ensures that the back pressure airflow flows smoothly from the heat dissipation fin 71 channel to the return flow accumulation chamber Q and then returns to the impeller chamber through the second return flow hole 66, reducing airflow leakage / flow from the return flow accumulation chamber Q to the first return flow hole 65 side.
[0028] An air conditioning device of the present invention includes a heat dissipation fin 71 that, while cooling the motor 7, also works in conjunction with rotating guide vanes (67, 68) to better promote the return flow of high-pressure airflow from the back side of the rear cover plate 61 through the first return hole 65. This enhances the cooling effect on the motor 7, effectively balances the axial force, and reduces vibration. With the combined action of the rotating guide vanes (67, 68) and the heat dissipation fin 71, part of the high-pressure airflow from the back side of the rear cover plate 61 returns through the first return hole 65, while the other part, after cooling the motor 7, flows into the return accumulation chamber Q and then returns to the impeller chamber through the second return hole 66. This enhances the cooling effect on the motor 7, effectively balances the axial force, and reduces vibration.
[0029] The above embodiments are illustrative of the present invention and not intended to limit the invention. It is understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.
Claims
1. An air conditioning device, comprising an indoor unit, the indoor unit comprising a housing (1), a panel (2), a liner (3), a mounting base (4), a heat exchanger (5), a centrifugal impeller (6), a motor (7), and an inlet collector (8). The lower end face of the housing is connected to the panel, the inner side wall of the housing is fitted with the liner, the lower end face of the liner is connected to the panel, the upper end face of the panel is provided with a mounting base, the mounting base is provided with a mounting groove, the mounting groove is installed with a heat exchanger, the other end of the heat exchanger is connected to the liner, and a centrifugal impeller is installed inside the housing. The impeller includes a wheel and a motor. The drive shaft of the motor is connected to the centrifugal impeller. The centrifugal impeller includes a rear cover plate (61), blades, and a front cover plate. An inlet collector is installed at the air inlet of the front cover plate. The radial outer end of the inlet collector is connected to the mounting base. The rear cover plate includes a first flat plate (62), a conical portion (63), and a second flat plate (64) connected in sequence. The motor is installed in the space formed by the top wall of the housing, the conical portion, and the second flat plate. The drive shaft of the motor is connected to the second flat plate. Multiple first return holes (65) are provided on the conical portion. Its features are: The outer peripheral surface of the motor is provided with multiple flow-guiding heat sinks (71), which are inclined relative to the rotation axis of the centrifugal impeller. A plurality of rotating guide vanes (67, 68) are provided on one side of the conical part adjacent to the motor. One or more second return holes (66) are provided on the second flat plate part (64). The rotating guide vanes include a first guide vane (67) and a second guide vane (68). The plurality of first guide vanes and the plurality of second guide vanes are distributed circumferentially along the conical part (63). The first guide vane is located radially inside the second guide vane. The lower end face of the motor and the first guide vane and the second flat plate part form a return accumulation cavity (Q). The connection between the first guide vane (67) and the second guide vane (68) has a minimum sealing gap at the corner of the lower end of the motor. The height of the first guide vane (67) is greater than the height of the second guide vane (68), and the height of the first guide vane is 1.8-2.5 times the height of the second guide vane.
2. The air conditioning device as described in claim 1, characterized in that, The heat sink (71) is inclined in a straight line or in a spiral along the outer periphery of the motor, and the inclination angle of the heat sink relative to the axis of rotation is 15°-75°.
3. The air conditioning device as described in claim 1, characterized in that, Furthermore, the first guide vane and the second guide vane are integrally formed, and at this time, the number of the first guide vane and the second guide vane are equal.
4. The air conditioning device as described in claim 1, characterized in that, Furthermore, the first and second guide vanes are set separately, and the number of the first guide vanes is 0.4-0.8 times the number of the second guide vanes.
5. The air conditioning device as described in claim 3 or 4, characterized in that, Multiple heat dissipation fins (71) are evenly or non-uniformly distributed along the outer periphery of the motor. The second heat dissipation fin (68) has the opposite tilt direction / rotation direction to the corresponding heat dissipation fin. The first heat dissipation fin (67) has the opposite or the same tilt direction / rotation direction to the corresponding heat dissipation fin.