Automatic temperature control structure of blower motor

Abstract

The utility model provides an automatic temperature control structure of an air blower motor, and solves the problems that the heat dissipation speed of a conventional air blower heat dissipation structure cannot be adjusted according to the environment temperature during operation, and the energy waste is serious. Comprising a volute; a circulating cavity and a driving cavity are sequentially formed in an inner cavity of the volute, an impeller is arranged in the circulating cavity, a motor is arranged in the driving cavity, and an output shaft of the motor is connected with a rotating shaft of the impeller; an outer cooling pipe is arranged between the circulating cavity and the driving cavity, a temperature control adjusting assembly for controlling the air inlet flow is arranged on the outer cooling pipe, and the temperature control adjusting assembly comprises an induction unit arranged on the motor. The heat dissipation structure is widely applied to the technical field of air blower heat dissipation structures.

Description

TECHNICAL FIELD

[0001] The application relates to a centrifugal blower motor automatic temperature control structure. BACKGROUND

[0002] In the working process of a centrifugal blower, the blades are driven to rotate by a motor, and the centrifugal force generated thereby is used to transport gas. In this process, a large amount of heat is generated by the motor and the blades, and the overall temperature of the centrifugal blower is increased. High temperature can accelerate the aging of the equipment, cause circuit failure, and shorten the service life of the centrifugal blower. Therefore, the centrifugal blower needs to be cooled in time to avoid heat accumulation and affect the normal work.

[0003] At present, there are two common heat dissipation methods for centrifugal blowers, namely water cooling and self-cooling fan cooling. The water cooling method is to pump cooling water into the cooling water system for heat dissipation by a water pump. This method needs to additionally add a cooling water system to the centrifugal blower, and the structure is complex and the equipment cost is high. The self-cooling fan cooling method is to set a self-cooling fan at the end of the motor shaft, and the heat is blown away by the rotation of the self-cooling fan. Compared with water cooling, this method is more widely used and has lower cost, but has the following shortcomings: the self-cooling fan has no speed adjusting mechanism, and its rotation speed is consistent with the rotation speed of the motor shaft. When the centrifugal blower is just started and the accumulated heat is small, the self-cooling fan still cools at a fixed cooling speed, and always consumes fixed power, resulting in large power loss and serious energy waste.

[0004] Therefore, there is an urgent need for a centrifugal blower heat dissipation structure that can solve the above problems. CONTENT OF THE INVENTION

[0005] In order to solve the above-mentioned problems, the technical scheme adopted by the present application is to provide a centrifugal blower motor automatic temperature control structure, which solves the problems of the existing centrifugal blower heat dissipation structure that the cooling speed cannot be adjusted according to the ambient temperature and the energy is wasted seriously. The centrifugal blower motor automatic temperature control structure comprises a scroll, a circulating cavity and a driving cavity are sequentially arranged in the inner cavity of the scroll, a impeller is arranged in the circulating cavity, a motor is arranged in the driving cavity, the output shaft of the motor is connected with the rotating shaft of the impeller, an outer cooling pipe is arranged between the circulating cavity and the driving cavity, a temperature control adjusting assembly for controlling the air inlet flow rate is arranged on the outer cooling pipe, and the temperature control adjusting assembly comprises a sensing unit arranged on the motor.

[0006] Preferably, the circulating cavity is provided with an air inlet pipe and an air outlet pipe, the driving cavity is provided with an air inlet and an air outlet, and the air outlet pipe and the air inlet are communicated with each other through the outer cooling pipe.

[0007] Preferably, the temperature control adjusting assembly is an electric temperature control adjusting assembly, and the sensing unit of the electric temperature control adjusting assembly is a temperature sensor.

[0008] Preferably, the electric temperature control adjusting assembly further comprises a control unit and an electric proportional valve, and the temperature sensor, the control unit and the electric proportional valve are sequentially connected by wires.

[0009] Preferably, the temperature control adjusting assembly is a mechanical temperature control adjusting assembly, and the sensing unit of the mechanical temperature control adjusting assembly is a thermal expansion material.

[0010] Preferably, the mechanical temperature control adjusting assembly further comprises a bracket, a push rod and a valve, the bracket is fixed to the inner wall of the volute at the air inlet, one end of the push rod is fixed to the bracket, and the other end of the push rod is slidably connected with a sealing shell; a valve for controlling the opening and closing of the air inlet is sleeved on the top of the sealing shell, a return spring is sleeved on the sealing shell, one end of the return spring is fixedly connected with the bottom of the bracket, and the other end of the return spring is movably connected with the bottom of the valve, and the valve abuts against the inner side of the bracket under the action of the return spring; the thermal expansion material is arranged in the sealing shell.

[0011] Preferably, an elastic member is arranged between the push rod and the thermal expansion material.

[0012] Preferably, the air inlet pipe is opposite to the impeller, and the air outlet pipe is arranged on the side surface of the volute.

[0013] Preferably, an inner cooling pipe is arranged between the air inlet and the air outlet, and the inner cooling pipe is arranged close to the motor.

[0014] Preferably, the inner cooling pipe is spirally arranged around the motor.

[0015] The beneficial effects of the utility model are as follows: the circulating cavity, the air outlet pipe and the outer cooling pipe are in communication with the driving cavity, the temperature control adjusting assembly is arranged on the outer cooling pipe, part of the gas flowing in the air outlet pipe enters the driving cavity through the outer cooling pipe, the heat generated by the motor is taken away, and then the heat is discharged from the air outlet, so that the self-cooling heat dissipation of the blower is completed; the cooling gas driven by the centrifugal force of the impeller is fully utilized, and the heat dissipation efficiency is high. The self-cooling fan does not need to be additionally arranged at the end of the motor, the structure is simple, and the manufacturing cost of the equipment is reduced. The temperature control adjusting assembly opens the passage of the outer cooling pipe according to the sensed motor temperature, adjusts the size of the cooling air flow, controls the heat dissipation speed, improves the efficiency of the entire blower, reduces the power consumption, and is energy-saving and environment-friendly. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative labor.

[0017] Figure 1 It is a structural schematic view of the utility model embodiment one.

[0018] Figure 2 Structure schematic view of embodiment two of the utility model;

[0019] Figure 3 For Figure 2 Structure schematic view of A in the middle.

[0020] Symbol explanation in the figure: 1. scroll case;2. circulating cavity;3. driving cavity;4. impeller;5. motor;6. air inlet pipe;7. air outlet pipe;8. air inlet;9. air outlet;10. outer cooling pipe;11. temperature sensor;12. electric control proportional valve;13. support;14. push rod;15. valve;16. sealing shell;17. thermal expansion material;18. return spring. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical schemes and beneficial effects to be solved in the present application clearer and more apparent, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0022] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0023] It should be noted that the terms "first", "second" are only used for description purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0024] Now a kind of air blower motor automatic temperature control structure provided by the embodiment of the present application will be described.

[0025] Embodiment one

[0026] Please refer to Figure 1For the structure schematic view of the utility model embodiment one, the air blower motor automatic temperature control structure, including scroll case 1;Scroll case 1 inner chamber is equipped with circulation cavity 2 and drive cavity 3 in proper order, circulation cavity 2 is equipped with impeller 4, drive cavity 3 is equipped with motor 5, and the output shaft of motor 5 is connected with the rotating shaft of impeller 4;Circulation cavity 2 is equipped with air inlet pipe 6 and air outlet pipe 7, drive cavity 3 is equipped with air inlet 8 and air outlet 9, and air outlet pipe 7 is equipped with outer cooling pipe 10 between air inlet 8, and circulation cavity 2, air outlet pipe 7, outer cooling pipe 10 and drive cavity 3 are interconnected;Outer cooling pipe 10 is equipped with temperature control adjusting assembly that controls the size of air intake flow, and temperature control adjusting assembly includes the inductive unit arranged on motor 5.

[0027] Specifically, motor 5 drives impeller 4 to rotate at high speed, and gas enters the circulation cavity 2 of scroll case 1 from air inlet pipe 6, and then is discharged from air outlet pipe 7.In this process, in the initial state, the passageway of outer cooling pipe 10 is closed, and as motor 5 continuously generates and accumulates heat when running, temperature control adjusting assembly opens the passageway of outer cooling pipe 10 and adjusts the air intake flow according to the temperature of motor 5, and part of the gas flowing in air outlet pipe 7 enters drive cavity 3 through outer cooling pipe 10, carries away the heat generated by motor 5, and then is discharged from air outlet 9, to complete the self-cooling heat dissipation of air blower.When the temperature of motor 5 increases, under the adjustment of temperature control adjusting assembly, the air intake flow of outer cooling pipe 10 becomes larger, more gas enters drive cavity 3, so as to improve the heat dissipation efficiency;When the temperature of motor 5 decreases, under the adjustment of temperature control adjusting assembly, the air intake flow of outer cooling pipe 10 becomes smaller, until the passageway is completely closed.Compared with the self-cooling fan cooling in the prior art, the air blower motor automatic temperature control structure provided in the embodiment does not need to additionally set a self-cooling fan at the end of motor 5, has simple structure, reduces the equipment manufacturing cost, can adjust the cooling air flow according to the temperature of motor 5, and then controls the heat dissipation speed, saves energy and protects the environment.

[0028] Further, the temperature control adjusting assembly is an electric control temperature control adjusting assembly, and the inductive unit of the electric control temperature control adjusting assembly is a temperature sensor 11.

[0029] Further, the electric temperature control adjusting assembly further comprises a control unit and an electric proportional valve 12, and the temperature sensor 11, the control unit and the electric proportional valve 12 are sequentially connected through wires. Specifically, the temperature sensor 11 converts the temperature of the motor 5 into an electric signal and sends the electric signal to the control unit (including but not limited to a PLC controller and the like), and the control unit outputs an electric signal to the electric proportional valve 12 to adjust the opening degree of the electric proportional valve 12. When the temperature of the motor 5 increases, the opening degree of the electric proportional valve 12 increases, the air inlet flow of the outer cooling pipe 10 becomes larger, more gas enters the driving cavity 3, and the heat dissipation efficiency is improved; when the temperature of the motor 5 decreases, the opening degree of the electric proportional valve 12 decreases, the air inlet flow of the outer cooling pipe 10 becomes smaller, and the passage is completely closed. The electric temperature control adjusting assembly can accurately adjust the flow of the cooling gas according to the actual temperature of the motor 5, effectively reduce the temperature of the motor 5, and keep the temperature of the motor 5 in a suitable range at all times, so that the motor 5 is prevented from being damaged due to overheating.

[0030] Specifically, the air inlet pipe 6 is opposite to the impeller 4, and the air outlet pipe 7 is arranged on the side surface of the volute 1.

[0031] In one embodiment, an inner cooling pipe is arranged between the air inlet 8 and the air outlet 9, and the inner cooling pipe is arranged close to the motor 5.

[0032] Further, the inner cooling pipe is spirally arranged around the motor 5. Specifically, the gas enters the inner cooling pipe through the outer cooling pipe 10 and the air inlet 8, and is discharged from the air outlet 9. The inner cooling pipe guides the cooling gas, effectively guides the cooling gas to flow around the motor 5, and improves the heat dissipation effect.

[0033] The automatic temperature control structure of the blower motor 5 provided in the embodiment has the following working process: the motor 5 is started, the blower starts to operate, the motor 5 continuously generates and accumulates heat, the temperature sensor 11 converts the temperature of the motor 5 into an electric signal and sends the electric signal to the control unit, and the control unit outputs an electric signal to the electric proportional valve 12 to adjust the opening degree of the electric proportional valve 12. When the temperature of the motor 5 increases, the opening degree of the electric proportional valve 12 increases; when the temperature of the motor 5 decreases, the opening degree of the electric proportional valve 12 decreases. Part of the gas flowing in the air outlet pipe 7 enters the driving cavity 3 through the outer cooling pipe 10, carries away the heat generated by the motor 5, and is discharged from the air outlet 9, thereby completing the self-cooling heat dissipation of the blower.

[0034] Embodiment two

[0035] Please refer to Figure 2 The structure schematic diagram of the embodiment two of the utility model, compared with the embodiment one, the difference of the embodiment is:

[0036] Further, the temperature control adjusting assembly is a mechanical temperature control adjusting assembly, and the sensing unit of the mechanical temperature control adjusting assembly is a thermal expansion material 17.

[0037] Please refer to Figure 3 Further, the mechanical temperature control adjusting assembly further comprises a bracket 13, a push rod 14 and a valve 15, the bracket 13 is fixed on the inner wall of the volute 1 at the air inlet 8, one end of the push rod 14 is fixed on the bracket 13, and the other end is slidably connected with a sealing shell 16; the valve 15 for controlling the opening and closing of the air inlet 8 is sleeved on the top of the sealing shell 16, a reset spring 18 is sleeved on the sealing shell 16, one end of the reset spring 18 is fixedly connected with the bottom of the bracket 13, and the other end is movably connected with the bottom of the valve 15, the valve 15 is in abutment with the inner side of the bracket 13 under the action of the reset spring 18, and the inner part of the sealing shell 16 is provided with a thermal expansion material 17 (including but not limited to paraffin and the like).

[0038] Specifically, when the temperature of the motor 5 rises, the thermal expansion material 17 expands in volume, extrudes the push rod 14, and the push rod 14 applies a force in the opposite direction thereto, when the force is greater than the elastic force of the reset spring 18, the reset spring 18 is retracted, and the sealing shell 16 slides along the push rod 14 under the action of the push rod 14, the valve 15 is opened, the opening between the valve 15 and the bracket 13 becomes larger, and more gas enters the driving cavity 3 through the air inlet 8, so that the heat dissipation efficiency is improved; when the temperature of the motor 5 decreases, the thermal expansion material 17 shrinks in volume, the extrusion force of the thermal expansion material 17 on the push rod 14 decreases, the counterforce applied by the push rod 14 to the thermal expansion material 17 decreases, the reset spring 18 gradually resets, the sealing shell 16 slides along the push rod 14 under the elastic force of the reset spring 18, the opening between the valve 15 and the bracket 13 becomes smaller, the air inlet flow of the air inlet 8 becomes smaller, and finally the valve 15 is completely closed.

[0039] Further, an elastic member is arranged between the push rod 14 and the thermal expansion material 17, the elastic member is deformed elastically to fill the gap, and the thermal expansion material 17 is prevented from leaking; the elastic member gradually and stably transmits the force generated by the expansion or shrinkage of the thermal expansion material 17 to the push rod 14, so that the opening and closing of the valve 15 are more gradual and stable.

[0040] The automatic temperature control structure of the blower motor 5 provided in the embodiment has the working process as follows: the motor 5 is started, the blower starts to run, the motor 5 continuously generates and accumulates heat, and the thermal expansion material 17 expands or shrinks in volume according to the temperature of the motor 5. When the temperature of the motor 5 rises, the thermal expansion material 17 expands in volume, and the opening between the valve 15 and the bracket 13 becomes larger; when the temperature of the motor 5 decreases, the thermal expansion material 17 shrinks in volume, and the opening between the valve 15 and the bracket 13 becomes smaller. Part of the gas flowing through the air outlet pipe 7 enters the driving cavity 3 through the outer cooling pipe 10 and the air inlet 8, carries away the heat generated by the motor 5, and is discharged from the air outlet 9, so that the self-cooling heat dissipation of the blower is completed.

[0041] In the utility model, circulating cavity 2, air outlet pipe 7, outer cooling pipe 10 and drive cavity 3 are communicated with each other, and the outer cooling pipe 10 is equipped with temperature control adjusting assembly, part of the gas flowing in the air outlet pipe 7 enters the drive cavity 3 through the outer cooling pipe 10, takes away the heat generated by the motor 5, and is discharged from the air outlet 9, so that the self-cooling heat dissipation of the blower is completed; the cooling gas driven by the centrifugal force of the impeller 4 is fully utilized, and the heat dissipation efficiency is high. The self-cooling fan does not need to be additionally arranged at the end of the motor 5, the structure is simple, and the equipment manufacturing cost is reduced. The temperature control adjusting assembly opens the passage of the outer cooling pipe 10 according to the sensed temperature of the motor 5, adjusts the size of the cooling air flow, and then controls the heat dissipation speed, improves the efficiency of the whole blower, reduces the power consumption, and is energy-saving and environment-friendly.

[0042] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A kind of automatic temperature control structure of air blower motor, including volute (1);Its characterized in that: The volute (1) inner cavity is sequentially provided with a circulating cavity (2) and a driving cavity (3), the circulating cavity (2) is internally provided with an impeller (4), the driving cavity (3) is internally provided with a motor (5), the output shaft of the motor (5) is connected with the rotating shaft of the impeller (4); the circulating cavity (2) and the driving cavity (3) are provided with an outer cooling pipe (10), the outer cooling pipe (10) is provided with a temperature control adjusting assembly for controlling the air inlet flow size, the temperature control adjusting assembly comprises an induction unit arranged on the motor (5).

2. The automatic temperature control structure of the blower motor according to claim 1, characterized in that: The circulating cavity (2) is provided with an air inlet pipe (6) and an air outlet pipe (7), the driving cavity (3) is provided with an air inlet (8) and an air outlet (9), the air outlet pipe (7) and the air inlet (8) are communicated through the outer cooling pipe (10).

3. The automatic temperature control structure of the blower motor according to claim 2, characterized in that: The temperature control adjusting assembly is an electric temperature control adjusting assembly, the induction unit of the electric temperature control adjusting assembly is a temperature sensor (11).

4. The automatic temperature control structure of the blower motor according to claim 3, characterized in that: The electric temperature control adjusting assembly further comprises a control unit and an electric proportional valve (12), the temperature sensor (11), the control unit and the electric proportional valve (12) are sequentially connected through wires.

5. The automatic temperature control structure of the blower motor according to claim 2, characterized in that: The temperature control adjusting assembly is a mechanical temperature control adjusting assembly, the induction unit of the mechanical temperature control adjusting assembly is a thermal expansion material (17).

6. The automatic temperature control structure of the blower motor according to claim 5, characterized in that: The mechanical temperature control adjusting assembly further comprises a bracket (13), a push rod (14) and a valve (15), the bracket (13) is fixed on the inner wall of the volute (1) at the air inlet (8), one end of the push rod (14) is fixed on the bracket (13), and the other end is slidably connected with a sealing shell (16); the sealing shell (16) is provided on the top with the valve (15) for controlling the opening and closing of the air inlet (8), the sealing shell (16) is provided with a reset spring (18), one end of the reset spring (18) is fixedly connected with the bottom of the bracket (13), and the other end is movably connected with the bottom of the valve (15), the valve (15) is in abutment with the inner side of the bracket (13) under the action of the reset spring (18); the sealing shell (16) is internally provided with the thermal expansion material (17).

7. The automatic temperature control structure of the blower motor according to claim 6, characterized in that: An elastic member is arranged between the push rod (14) and the thermal expansion material (17).

8. The automatic temperature control structure of the blower motor according to claim 2, characterized in that: The air inlet pipe (6) is opposite to the impeller (4), and the air outlet pipe (7) is arranged on the side of the volute (1).

9. The automatic temperature control structure of the blower motor according to claim 2, characterized in that: An inner cooling pipe is arranged between the air inlet (8) and the air outlet (9), and the inner cooling pipe is arranged close to the motor (5).

10. The automatic temperature control structure of the blower motor according to claim 9, characterized in that: The inner cooling pipe is spirally arranged around the motor (5).

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