Dual-motor system with airflow adjusting function and air purifier

Abstract

The utility model discloses a dual-motor system with an airflow adjusting function, which comprises a first motor, a second motor and a motor starting control module, and the motor starting control module comprises an MCU (Microprogrammed Control Unit), a variable capacitance control circuit, a first variable capacitance starting circuit and a second variable capacitance starting circuit, the variable capacitance control circuit is electrically connected with the MCU control unit, signal input ends of the first variable capacitance starting circuit and the second variable capacitance starting circuit are respectively connected with the variable capacitance control circuit, and the first variable capacitance starting circuit and the second variable capacitance starting circuit are respectively connected with the first motor and the second motor. According to the dual-motor system with the airflow adjusting function, when the two motors are started, the rotating speeds of the two motors are different in the starting process by controlling the values of the variable capacitors in the first variable capacitor starting circuit and the second variable capacitor starting circuit to be different and the starting currents of the two motors to be different, resonance can be avoided, and resonance noise can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of purifiers, and more specifically, to a dual-motor system with an airflow regulating function. Background Art

[0002] With the increasing number of people living alone and the deepening of social pressure, people are increasingly in need of companionship and spiritual comfort, so the demand for pets is growing. As we all know, cats and dogs are the most common pets in daily life, but they also shed the most hair. Pet hair has harm to the human body that cannot be ignored, such as irritation and allergic reactions to the respiratory tract, eyes, and skin, as well as potential risks of microbial transmission. Therefore, for pet air purifiers, it is crucial to fully absorb pet hair in the environment and automatically clean the hair on the collection filter.

[0003] Patent document CN210780420U discloses a dual-motor system, including a first motor, a second motor and a motor controller, wherein the first motor includes a first shell, a first cavity is provided in the first shell, the second motor includes a second shell, a second cavity is provided in the second shell, cooling oil flows in both the first cavity and the second cavity, the motor controller includes a controller shell, a first heat transfer cavity connected to the first cavity is provided between the first shell and the controller shell, and a second heat transfer cavity connected to the second cavity is provided between the second shell and the controller shell, a heat dissipation water channel is provided in the controller shell, and the heat dissipation water channel includes a first water channel located on one side of the first heat transfer cavity and a second water channel located on one side of the second heat transfer cavity.

[0004] In the dual-motor system used in the air purifier in the prior art, a structure in which two motors drive two wind wheels is adopted. The two motors are started at the same time and reach a predetermined speed at the same time, which is easy to cause resonance, resulting in excessive noise or damage to the purifier structure.

[0005] Therefore, it is necessary to propose a dual-motor system with airflow adjustment function to solve the problems existing in the prior art. Utility Model Content

[0006] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the detailed implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0007] To solve the above problems, the utility model provides a dual-motor system with airflow regulation function, including a first motor, a second motor and a motor starting control module, the motor starting control module including an MCU control unit, a variable capacitor control circuit, a first variable capacitor starting circuit and a second variable capacitor starting circuit, the variable capacitor control circuit is electrically connected to the MCU control unit, the signal input ends of the first variable capacitor starting circuit and the second variable capacitor starting circuit are respectively connected to the variable capacitor control circuit, and the first variable capacitor starting circuit and the second variable capacitor starting circuit are respectively connected to the first motor and the second motor.

[0008] Preferably, a power module is further included, the power module includes a high voltage output end and a low voltage output end, the high voltage output end is connected to the first motor and the second motor, and the low voltage output end is connected to the MCU control unit.

[0009] Preferably, the variable capacitor control circuit includes a first digital-to-analog converter and a second digital-to-analog converter, the signal input ends of the first digital-to-analog converter and the second digital-to-analog converter are connected to the signal output end of the MCU control unit, and the signal output ends of the first digital-to-analog converter and the second digital-to-analog converter are respectively connected to the signal input ends of the variable capacitors of the first variable capacitor starting circuit and the second variable capacitor starting circuit.

[0010] Preferably, the variable capacitor control circuit also includes a booster, the input ends of the two boosters are respectively connected to the output ends of the first digital-to-analog converter and the second digital-to-analog converter, and the output ends of the two boosters are respectively connected to the signal input ends of the variable capacitors of the first variable capacitor starting circuit and the second variable capacitor starting circuit.

[0011] Preferably, the variable capacitor is a voltage-controlled variable capacitor.

[0012] The utility model also discloses an air purifier, comprising the dual-motor system with airflow regulating function in the above technical solution.

[0013] Preferably, it comprises a shell, wherein air inlets are respectively arranged at the upper and lower ends of the shell, a filter and an air guide cover are sequentially fixedly arranged on one side of the air inlet in the shell near the middle of the shell, the air inlet, the filter and the air guide cover are connected, and an air outlet is arranged at a position of the side wall of the shell corresponding to the air outlet channel of the air guide cover;

[0014] The two wind guide covers are arranged back to back, and the inner walls of the wind guide covers close to each other are respectively fixedly provided with the power output shafts of the first motor and the second motor, and the wind wheels are respectively fixedly connected to the power output shafts of the first motor and the second motor, and the wind wheels are arranged in the wind guide covers;

[0015] The motor start control module is fixedly arranged on the inner wall of the shell body near the air guide cover.

[0016] Preferably, the filter is sealed to the housing.

[0017] Preferably, the first motor and the second motor are coaxially arranged.

[0018] Preferably, an array of fixed columns are fixedly arranged on the inner wall of the air guide cover away from the filter, and a connecting plate is fixedly arranged on the outer circumferential surface of the first motor and the second motor, and the connecting plate is fixedly connected to the fixed columns.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] The dual-motor system with airflow regulation function described in the utility model, when the two motors are started, controls the values ​​of the variable capacitors in the first and second variable capacitor starting circuits to be different, so that the starting currents of the two motors are different, so that the speeds of the two motors in the starting process are different, which can avoid resonance, reduce resonance noise and protect the purifier structure from damage.

[0021] The dual-motor system with airflow adjustment function described in the utility model, other advantages, objectives and features of the utility model will be reflected in part through the following description, and in part will be understood by technicians in this field through research and practice of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 It is a structural schematic diagram of a dual-motor system with airflow adjustment function disclosed in the utility model;

[0024] Figure 2 This is a structural schematic diagram of a dual-motor system with an airflow adjustment function connected to a power module disclosed in the utility model;

[0025] Figure 3 It is a structural schematic diagram of a dual-motor system with airflow adjustment function disclosed in the utility model;

[0026] Figure 4 It is a structural schematic diagram of the air purifier disclosed in the utility model;

[0027] Figure 5 This is a structural schematic diagram of a first motor disclosed in the utility model installed in an air guide cover. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0029] It should be understood that terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0030] like Figure 1-3 As shown, a dual-motor system with airflow regulation function includes a first motor 1, a second motor 2 and a motor starting control module, the motor starting control module includes an MCU control unit, a variable capacitor control circuit, a first variable capacitor starting circuit and a second variable capacitor starting circuit, the variable capacitor control circuit is electrically connected to the MCU control unit, the signal input ends of the first variable capacitor starting circuit and the second variable capacitor starting circuit are respectively connected to the variable capacitor control circuit, and the first variable capacitor starting circuit and the second variable capacitor starting circuit are respectively connected to the first motor 1 and the second motor 2.

[0031] Furthermore, it also includes a power module, which includes a high-voltage output terminal and a low-voltage output terminal, the high-voltage output terminal is connected to the first motor 1 and the second motor 2, and the low-voltage output terminal is connected to the MCU control unit.

[0032] Furthermore, the variable capacitor control circuit also includes a booster, the input ends of the two boosters are respectively connected to the output ends of the first digital-to-analog converter 3 and the second digital-to-analog converter 4, and the output ends of the two boosters are respectively connected to the signal input ends of the variable capacitors of the first variable capacitor starting circuit and the second variable capacitor starting circuit.

[0033] Furthermore, the variable capacitor is a voltage-controlled variable capacitor.

[0034] The working principle of the above technical solution is:

[0035] The capacitance values ​​of the variable capacitors when multiple motors are started are preset in the MCU control unit. When the MCU control unit receives the motor start instruction, the MCU control unit sends different signals to the variable capacitor control circuit respectively. The variable capacitor control circuit includes two groups of digital-to-analog converters and a booster. The digital-to-analog converter includes a first digital-to-analog converter 3 and a second digital-to-analog converter 4. The first digital-to-analog converter 3 converts the signal of the MCU control unit into a voltage signal and acts on the variable capacitor after boosting by the booster, thereby changing the capacitance value of the variable capacitor of the first variable capacitor starting circuit. The same principle is used, and the value of the variable capacitor of the second variable capacitor starting circuit is also determined according to the control signal of the MCU control unit. Since the values ​​of the capacitors in the two variable capacitor starting circuits are different, the starting currents of the first motor and the second motor are different. The first motor 1 and the second motor 2 use the same single-phase AC motor. The starting torques of the first motor and the second motor are different during the starting process, so that the starting speeds and starting times of the first motor 1 and the second motor 2 are different during the starting process, thereby preventing the first motor and the second motor from generating resonance.

[0036] The MCU control unit outputs different control signals, which can change the capacitance value of the variable capacitor, thereby changing the rotational speed of the first motor and the second motor. When the rotational speed of the first motor and the second motor changes, the rotational speed of the wind wheel fixedly connected to the power output shaft of the first motor and the second motor can be changed, thereby adjusting the size of the airflow driven by the wind wheel connected to the first motor and the second motor.

[0037] Beneficial effects of the above technical solution:

[0038] The dual-motor system with airflow regulation function described in the utility model, when the two motors are started, controls the values ​​of the variable capacitors in the first and second variable capacitor starting circuits to be different, so that the starting currents of the two motors are different, so that the speeds of the two motors in the starting process are different, which can avoid resonance, reduce resonance noise and protect the purifier structure from damage.

[0039] The utility model also discloses an air purifier, comprising the dual-motor system with airflow regulating function in the above technical solution.

[0040] Further, it includes a shell 5, wherein air inlets 6 are respectively arranged at the upper and lower ends of the shell 5, a filter 8 and an air guide cover 9 are sequentially fixedly arranged on one side of the air inlet 6 in the shell 5 close to the middle of the shell 5, the air inlet 6, the filter 8 and the air guide cover 9 are connected, and an air outlet is arranged at a position corresponding to the air outlet channel 10 of the air guide cover 9 on the side wall of the shell 5;

[0041] The two wind guide covers 9 are arranged back to back, and the inner walls of the wind guide covers 9 close to each other are respectively fixed with the power output shafts of the first motor 1 and the second motor 2, and the wind wheels 7 are respectively fixedly connected to the wind wheels 7, which are arranged in the wind guide covers 9;

[0042] The motor start control module is fixedly arranged on the inner wall of the housing 5 near the air guide cover 9 .

[0043] Furthermore, the filter 8 and the housing 5 are sealedly connected.

[0044] Furthermore, the first motor 1 and the second motor 2 are coaxially arranged.

[0045] Furthermore, an array of fixed columns 11 are fixedly arranged on the inner wall of the air guide cover 9 away from the filter 8 , and a connecting plate 12 is fixedly arranged on the outer circumferential surface of the first motor 1 and the second motor 2 , and the connecting plate 12 is fixedly connected to the fixed columns 11 .

[0046] The working principle of the above technical solution: the air purifier includes two sets of purification units arranged opposite to each other in an upper and lower direction, the first motor 1 and the second motor 2 respectively drive the wind wheel 7 to rotate, and the wind wheel 7 respectively sucks the air containing pet hair near the ground and suspended in the air into the air inlets at the upper and lower ends of the air purifier, and the pet hair and other impurities in the air are blocked by the filter 8 under the filtering action of the filter 8. The filtered air is discharged from the air outlet through the wind guide cover and the air outlet channel 10 under the action of the wind wheel, completing the air filtration. The filter 8 needs to be cleaned regularly according to the usage.

[0047] The first motor 1 and the second motor 2 are fixed back to back on the inner wall of the air guide cover 9 away from the filter 8. The two air guide covers 9 are tightly fixed in the shell 5 to save space. The first motor and the second motor are arranged back to back, and air inlets are opened at the upper and lower ends of the shell 5, and an air outlet is opened in the middle of the shell 5. The two motors work at the same time, which improves the purification efficiency of the air purifier and can clean pet hair on the ground and pet hair suspended in the air at the same time.

[0048] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A dual motor system with airflow regulation function, characterized in that: The invention comprises a first motor (1), a second motor (2) and a motor start control module, wherein the motor start control module comprises an MCU control unit, a variable capacitor control circuit, a first variable capacitor start circuit and a second variable capacitor start circuit, wherein the variable capacitor control circuit is electrically connected to the MCU control unit, signal input ends of the first variable capacitor start circuit and the second variable capacitor start circuit are respectively connected to the variable capacitor control circuit, and the first variable capacitor start circuit and the second variable capacitor start circuit are respectively connected to the first motor (1) and the second motor (2).

2. The dual-motor system with airflow adjustment function according to claim 1, characterized in that: It also includes a power module, which includes a high-voltage output end and a low-voltage output end, the high-voltage output end is connected to the first motor (1) and the second motor (2), and the low-voltage output end is connected to the MCU control unit.

3. The dual-motor system with airflow adjustment function according to claim 2, characterized in that: The variable capacitance control circuit comprises a first digital-to-analog converter (3) and a second digital-to-analog converter (4), the signal input ends of the first digital-to-analog converter (3) and the second digital-to-analog converter (4) being connected to the signal output end of the MCU control unit, and the signal output ends of the first digital-to-analog converter (3) and the second digital-to-analog converter (4) being connected to the signal input ends of the variable capacitance of the first variable capacitance start-up circuit and the second variable capacitance start-up circuit, respectively.

4. The dual-motor system with airflow adjustment function according to claim 3, characterized in that: The variable capacitor control circuit also includes a booster, the input ends of the two boosters are respectively connected to the output ends of the first digital-to-analog converter (3) and the second digital-to-analog converter (4), and the output ends of the two boosters are respectively connected to the signal input ends of the variable capacitors of the first variable capacitor start-up circuit and the second variable capacitor start-up circuit.

5. The dual-motor system with airflow adjustment function according to claim 4, characterized in that: The variable capacitor is a voltage-controlled variable capacitor.

6. An air purifier, characterized in that: It comprises a dual motor system with airflow regulation function as described in any one of claims 1 to 5.

7. The air purifier according to claim 6, characterized in that: The invention comprises a shell (5), wherein air inlets (6) are respectively arranged at the upper and lower ends of the shell (5), a filter (8) and an air guide cover (9) are fixedly arranged in sequence on one side of the air inlet (6) in the shell (5) close to the middle of the shell (5), the air inlet (6), the filter (8) and the air guide cover (9) are connected, and an air outlet is arranged at a position corresponding to an air outlet channel (10) of the air guide cover (9) on the side wall of the shell (5); The two wind guide covers (9) are arranged back to back, and the inner walls of the wind guide covers (9) adjacent to each other are respectively fixedly provided with the power output shafts of the first motor (1) and the second motor (2), and the wind wheels (7) are respectively fixedly connected to the wind wheels (7), and the wind wheels (7) are arranged inside the wind guide covers (9); The motor start control module is fixedly arranged on the inner wall of the housing (5) at a position close to the air guide cover (9).

8. The air purifier according to claim 7, characterized in that: The filter (8) is sealed to the housing (5).

9. The air purifier according to claim 8, characterized in that: The first motor (1) and the second motor (2) are coaxially arranged.

10. The air purifier according to claim 9, characterized in that: An array of fixed columns (11) is fixedly arranged on the inner wall of the air guide cover (9) on the side away from the filter (8), and a connecting plate (12) is fixedly arranged on the outer circumferential surface of the first motor (1) and the second motor (2), and the connecting plate (12) is fixedly connected to the fixed columns (11).

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