Fan assembly, household appliance and range hood

Abstract

The invention discloses a fan assembly, a household appliance and a range hood, and the invention relates to the field of household appliances; the fan assembly also includes a magnetic field heating part and a magnetic field generating part made of magnetic heating material; the magnetic field heating part is arranged in the fan cavity, and the magnetic field generating part is arranged on the outside of the shell; the magnetic field heating part has a first state in which the magnetic field generating part generates a magnetic field, and the magnetic field heating part generates heat and heats up in the first state; the magnetic field heating part also has a second state in which the magnetic field generating part generates a magnetic field away from the magnetic field generating part; the invention generates a magnetic field through the magnetic field generating part, and the magnetic field heating part made of magnetic heating material generates heat under the action of the magnetic field, thereby softening the oil stains attached to the magnetic field heating part, reducing the adhesion of the oil stains and separating them from the magnetic field heating part, thereby achieving the purpose of cleaning; the invention performs electromagnetic heating on the magnetic field heating part, has high heat conduction efficiency, high heating efficiency, low energy consumption, does not need to disassemble the fan, and saves time and effort.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a fan assembly, a household appliance and a range hood. Background Art

[0002] The problem of cleaning oil stains on fans has always been a difficult problem. Oil stains adhering to the fan wheel will increase the weight of the fan wheel, thereby increasing the load of the motor that drives the fan wheel to rotate, thereby reducing the service life of the motor and affecting the exhaust volume. Therefore, there is an urgent need for a fan, household appliance and range hood with a cleaning function. Summary of the invention

[0003] The purpose of the present invention is to provide a fan assembly, a household appliance and a range hood to solve the problems existing in the above-mentioned prior art.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a fan assembly, comprising a fan cavity formed by a shell, and also comprising a magnetic field heating part and a magnetic field generating part made of a magnetic heating material; the magnetic field heating part is arranged in the fan cavity, and the magnetic field generating part is arranged outside the shell;

[0006] The magnetic field heating unit has a first state where the magnetic field generating unit generates a magnetic field, and the magnetic field heating unit generates heat and heats up in the first state; the magnetic field heating unit also has a second state where the magnetic field generating unit generates a magnetic field away from the magnetic field generating unit.

[0007] Preferably, a wind wheel is arranged inside the fan cavity, and the wind wheel includes a front disk, a rear disk, and blades circumferentially arranged between the front disk rim and the rear disk rim, the blades are arc-shaped and inclined at the same angle, and the magnetic field heating part is the wind wheel.

[0008] Preferably, the fan assembly also includes a motor, the rear disk is fixedly connected to a support frame, and the support frame is driven by the motor; the wind wheels are provided in N groups, 1 / N of the wind wheels are in a first state, and (N-1) / N of the wind wheels are in a second state; the time when 1 / N of the wind wheels are in the first state includes two situations: first, the motor slowly and continuously rotates in the opposite direction; second, after the magnetic field generating unit is aligned with 1 / N of the heating wind wheels, the magnetic field generating unit heats 1 / N of the heating wind wheels to a specified temperature and maintains it for a period of time t.

[0009] Preferably, the motor and the magnetic field generating part are staggered, or the core of the motor is directly opposite to the magnetic field generating part, and the distance between the core of the motor and the magnetic field generating part is greater than 5 cm, and a non-magnetic shell is wrapped around the outside of the motor core.

[0010] Preferably, the magnetic field generating unit is an electromagnetic heating coil fixedly arranged on the outside of the shell, and the magnetic lines of force generated by the electromagnetic heating coil put the wind wheel in the first state; the electromagnetic heating coil is fixedly connected to a coil disk, and the coil disk is fixedly connected on the outside of the shell.

[0011] Preferably, water spray ports are provided on the shell and the support frame, a sewage collecting tank is provided at the bottom of the shell, and the sewage collecting tank is connected to a sewage discharge pipe.

[0012] Preferably, the distance between the magnetic heating coil and the wind wheel is 0.5 to 1.5 centimeters.

[0013] A household appliance comprises a polluted area and a fan assembly as described above, wherein the fan assembly is arranged in the polluted area.

[0014] A range hood comprises an air duct, wherein the fan assembly described in any one of the above items is fixedly installed in the air duct, the air duct comprises an air inlet duct connected to the air inlet of the fan assembly and an exhaust duct connected to the air outlet of the fan assembly, and a check valve is arranged on the exhaust duct.

[0015] Preferably, a range hood further comprises:

[0016] A machine body, wherein the fan assembly is connected to the machine body and is suitable for generating airflow;

[0017] An oil fume collecting hood, the oil fume collecting hood is connected to the machine body, and the air inlet duct is arranged between the oil fume collecting hood and the fan assembly;

[0018] Oil storage box, the oil storage box is used to collect waste oil generated by range hood filtration

[0019] The present invention discloses the following technical effects: the present invention generates a magnetic field through a magnetic field generating part, and the magnetic field heating part made of a magnetic heating material generates heat under the action of the magnetic field, thereby softening the oil stains attached to the magnetic field heating part, reducing the adhesion of the oil stains and separating them from the magnetic field heating part, thereby achieving the purpose of cleaning. Since the present invention directly heats the magnetic field heating part through the magnetic field generated by the magnetic field generating part and directly acts on the oil stain part, the heat conduction efficiency is high, the heating efficiency is high, the energy consumption is low, and there is no need to disassemble the fan, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 This is a schematic diagram of the structure of the fan assembly of the present invention;

[0022] Figure 2 This is a schematic diagram of the wind wheel structure of the present invention;

[0023] Figure 3 It is a schematic cross-sectional view of the structure of a fan assembly according to another embodiment.

[0024] Among them, 1 is a shell, 2 is a fan cavity, 3 is a wind wheel, 31 is a front disk, 32 is a rear disk, 33 is a blade, 34 is a support frame, and 5 is a coil disk. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Reference Figure 1-2 This embodiment provides a fan assembly, including a fan cavity 2 formed by a shell 1, and also including a magnetic field heating part and a magnetic field generating part made of a magnetic heating material; the magnetic field heating part is arranged in the fan cavity 2, and the magnetic field generating part is arranged outside the shell 1;

[0028] The magnetic field heating part has a first state in which the magnetic field generating part generates a magnetic field, and the magnetic field heating part generates heat and rises in the first state; the magnetic field heating part also has a second state in which it is located away from the magnetic field generating part to generate a magnetic field. During operation, the magnetic field heating part made of a magnetic heating material is heated by the magnetic field generating part, and the magnetic field heating part is in the first state, that is, the magnetic field heating part itself generates heat and rises in temperature, thereby separating the oil stains from the magnetic field heating part, and achieving the purpose of removing the oil stains. When the magnetic field heating part is a rotating part, it is difficult to heat it, especially when it has a large area and the heat exchange with the air is sufficient during movement, it is even more difficult to heat it and reduce the adhesion of pollutants. Through magnetic field heating, since the magnetic field can be formed in the air, there is no need for an electrical connection, and the electromagnetic heating part generates heat internally, thereby creatively overcoming the heating difficulties.

[0029] In an embodiment, a wind wheel 3 is arranged inside the fan cavity 2, and the wind wheel 3 includes a front disk 31, a rear disk 32 and blades 33 circumferentially arranged between the wheel rims of the front disk 31 and the wheel rims of the rear disk 32, and the blades 33 are arc-shaped and inclined at the same angle. The magnetic field heating portion is the wind wheel 3. The fan generates airflow inside the fan cavity 2 by rotating the wind wheel 3, so the wind wheel 3 is in direct contact with oil smoke and the like, and oil stains and the like are attached to the wind wheel 3. By setting the wind wheel 3 as a magnetic field heating portion and heating it, the oil stain cleaning work of the wind wheel 3 can be achieved.

[0030] According to a further optimization scheme, the fan assembly also includes a motor, and the rear disc 32 is fixedly connected to a support frame 34, and the support frame 34 is driven by the motor; the support frame 34 is driven to rotate by the motor, thereby driving the wind wheel 3 to rotate, and the fan assembly works.

[0031] In this embodiment, the wind wheels 3 are provided in N groups, each group of wind wheels 3 includes a plurality of wind wheels 3, 1 / N of the wind wheels 3 are in a first state, (N-1) / N of the wind wheels 3 are in a second state, that is, 1 / N of the wind wheels 3 are heated under the action of the magnetic field generating part, and the remaining wind wheels 3 are in the second state due to the distance, that is, in a normal state.

[0032] According to the working state of the motor when rotating, the time when the wind wheel 3 is in the first state includes two situations:

[0033] Firstly, the motor rotates slowly and continuously in the reverse direction, that is, the motor rotates slowly and continuously to drive the wind wheel 3 to rotate back and forth, so that the whole set of wind wheels 3 is in a cyclic heating state, and the cyclic heating is performed to cause the oil to separate from the wind wheel 3 to realize the cleaning work. Since the wind wheel 3 rotates slowly in the reverse direction, the air flow inside the fan chamber 2 is slow, the energy loss of the wind wheel 3 is small, and the heating efficiency is high. At the same time, since the exhaust check valve of the range hood is closed, no air supply will be formed during the reverse rotation process, and no impact will be caused on the surrounding environment. The rotation speed of the wind wheel can be controlled to rotate slowly in the reverse direction, and the blades and other structures of the wind wheel have sufficient time to heat to the preset temperature. Once the forward power is supplied, the wind wheel will have a large acceleration, and slow rotation cannot be achieved. The reverse slow rotation can be achieved by modulating the frequency of the wind wheel motor to a low-frequency reverse power supply.

[0034] Secondly, after the magnetic field generating unit is aligned with the heating wind wheel 3 of 1 / N, the magnetic field generating unit heats the heating wind wheel 3 of 1 / N to the specified temperature and maintains it for a period of time t, that is, by directly heating the heating wind wheel 3 of 1 / N to the specified temperature, the oil stains are softened, and the softened oil stains drip under the action of gravity. At the same time, the motor can be driven to make the wind wheel 3 shake quickly, that is, the forward and reverse acceleration of the motor is quickly switched, so that the motor drives the wind wheel 3 to rotate forward and reverse quickly, and the oil stains drip quickly under the action of centrifugal force. After cleaning the heating wind wheel 3 of 1 / N, the motor is controlled to rotate 360 / N degrees, and the next 1 / N wind wheel 3 is heated and degreased, and the operation is cyclic until all the wind wheels are cleaned.

[0035] according to Figure 3 As shown, the magnetic field generating part is an electromagnetic heating coil fixedly arranged on the outside of the housing 1, and the magnetic field lines generated by the electromagnetic heating coil make the wind wheel 3 in the first state; the electromagnetic heating coil is a coil disk 5, and the coil disk 5 fixedly connected is arranged on the outside of the housing 1, and the coil disk 5 realizes the transformation of the magnetic field through alternating current, and the copper wire formed by winding is further wound into a plane pattern. The coil disk 5 can generate a 15-70kHz AC magnetic field, and the wind wheel of the magnetic heating material, especially the blade 33, is heated due to the eddy current effect in the high-frequency AC magnetic field, thereby improving the heating efficiency. In this embodiment, the coil disk 5 is arranged near the vortex tongue of the housing, and the distance between the coil disk 5 and the wind wheel blade formed there is small, and the distance is 0.5 to 1.5 cm, which further improves the heating efficiency.

[0036] A further optimization scheme is that the shell 1 of the fan assembly is in the shape of a volute, and the electromagnetic heating coil is fixedly arranged on the side of the shell 1 close to the air outlet, so as to reduce the distance between the electromagnetic heating coil and the wind wheel 3 and improve the energy transfer efficiency. In some embodiments, the distance between the coil disk and the wind wheel blade is 0.5 to 1.5 cm. When the distance is further reduced, problems with the wind wheel structure will occur, affecting the noise or efficiency of the wind wheel. When the distance is too large, it will significantly affect the heating efficiency. In some embodiments, the distance value used can be 0.65 cm, 0.94 cm, 1.13 cm, so as to adapt to different fan conditions.

[0037] Preferably, the material of the wind wheel 3 is aluminum alloy. Aluminum alloy can generate eddy currents and generate heat under a high-frequency AC magnetic field. At the same time, aluminum alloy is a lightweight material and has high strength. While ensuring that the wind wheel 3 can generate heat under the magnetic field, the mass of the wind wheel 3 is reduced and the strength of the wind wheel 3 is improved.

[0038] In some embodiments, the motor and the magnetic field generating unit are staggered to prevent the magnetic field generated by the magnetic field generating unit from interacting with the windings and the iron core of the motor and affecting the normal operation of the core of the motor.

[0039] In other embodiments, the core of the motor is directly opposite to the magnetic field generating part, and the distance between the core of the motor and the magnetic field generating part is greater than 5 cm, and a non-magnetic shell is wrapped around the outside of the motor core, so as to prevent the magnetic field generated by the magnetic field generating part from interacting with the winding and the iron core of the motor and affecting the normal operation of the core of the motor.

[0040] The housing 1 and the support frame 34 are provided with water spraying ports, the bottom of the housing 1 is provided with a sewage collecting tank, and the sewage collecting tank is connected to a sewage discharge pipe. The water spraying operation is performed on the inner and outer sides of the wind wheel 3 through the water spraying ports, including the following situations:

[0041] Firstly, before the wind wheel 3 heats up, water is sprayed on the wind wheel 3 through the water nozzle so that a layer of water adheres to the outer surface of the wind wheel 3, and the oil stains are soaked by the water. After soaking for a certain period of time, the wind wheel 3 is heated by the magnetic field generating part. The soaked oil stains will be accelerated to peel off the wind wheel when heated, thereby improving the cleaning efficiency.

[0042] Secondly, after the wind wheel 3 heats up, when the temperature of the wind wheel 3 exceeds 100 degrees Celsius, water will vaporize, and the vaporized steam will accelerate the softening of the oil stains, thereby accelerating the stripping of the oil stains. Later, the wind wheel 3 is quickly shaken by the motor, that is, the forward and reverse acceleration of the motor is quickly switched, so that the motor drives the wind wheel 3 to rotate rapidly in the forward and reverse directions, and the oil stains drip quickly under the action of centrifugal force, thereby improving the cleaning efficiency.

[0043] Thirdly, water spraying is performed before and after the wind wheel 3 heats up. Before the wind wheel 3 heats up, it is soaked in water to accelerate the softening of the oil. After soaking for a certain period of time, the wind wheel 3 is heated by the magnetic field generating part. When the heating temperature reaches 100 degrees Celsius, water is sprayed for the second time. The vaporized steam will accelerate the softening of the oil, thereby accelerating the peeling of the oil. The wind wheel 3 is shaken quickly by the motor, and the oil drips quickly under the action of centrifugal force, thereby improving the cleaning efficiency.

[0044] Preferably, a sealed waterproof structure is provided on the outside of the motor, and the water sprayed from the water spray port will not affect the motor. At the same time, due to the isolation effect of the shell 1, the water sprayed from the water spray port will not affect the use of the magnetic field generating part.

[0045] This embodiment discloses a household appliance, including a polluted area, including the above-mentioned fan assembly, wherein the fan assembly is arranged in the polluted area, and the magnetic field generating part generates a 50-70kHz high frequency alternating magnetic field, and the magnetic field heating part generates heat, thereby softening and peeling off the oil stains attached to the magnetic field heating part, thereby achieving the cleaning of the oil stains on the fan assembly. This also overcomes the situation that the fan blades and other components cannot be heated and are difficult to clean.

[0046] This embodiment discloses a range hood, comprising

[0047] A fan assembly, wherein the fan assembly is the above-mentioned fan assembly, through which airflow is generated inside the range hood to discharge the oil smoke through the range hood.

[0048] The fan assembly is connected to the machine body and is suitable for generating airflow.

[0049] The fan assembly is fixedly installed in the air duct, and the air duct includes an air inlet duct connected to the air inlet of the fan assembly and an exhaust duct connected to the air outlet of the fan assembly, and a check valve is arranged on the exhaust duct. The fan assembly generates airflow in the air duct to drive the movement of oil smoke.

[0050] An oil fume collecting hood is connected to the machine body, and the air inlet duct is arranged between the oil fume collecting hood and the fan assembly.

[0051] The oil storage box is used to collect the waste oil generated by the range hood filtration. The drain pipe is connected to the oil storage box. The oil and waste water generated during the cleaning process of the wind wheel 3 are discharged into the waste oil box through the drain pipe to prevent them from being attached to the fan assembly for the second time.

[0052] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to 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.

[0053] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A fan assembly, comprising a fan chamber (2) formed by a housing (1), characterized in that: It also includes a magnetic field heating part and a magnetic field generating part made of magnetic heating material; the magnetic field heating part is arranged in the fan cavity (2), and the magnetic field generating part is arranged outside the housing (1); The magnetic field heating unit has a first state where the magnetic field generating unit generates a magnetic field, and the magnetic field heating unit generates heat and heats up in the first state; the magnetic field heating unit also has a second state where the magnetic field generating unit generates a magnetic field away from the magnetic field generating unit; The magnetic field heating part is a wind wheel (3) arranged inside the fan chamber (2), and the wind wheel (3) comprises a front disk (31), a rear disk (32), and blades (33) arranged circumferentially between the rim of the front disk (31) and the rim of the rear disk (32); The fan assembly also includes a motor, the rear disc (32) is fixedly connected to a support frame (34), and the support frame (34) is driven by the motor; The housing (1) and the support frame (34) are provided with water spraying ports, which spray water on both the inner and outer sides of the wind wheel (3). The water spraying operation process includes spraying water before the wind wheel (3) is heated and after the wind wheel (3) is heated, and the wind wheel (3) is rapidly rotated in the forward and reverse directions by rapidly switching the forward and reverse acceleration of the motor.

2. A fan assembly according to claim 1, characterized in that: The wind wheels (3) are provided in N groups, 1 / N of the wind wheels (3) are in a first state, and (N-1) / N of the wind wheels (3) are in a second state; the time when 1 / N of the wind wheels (3) are in the first state includes two situations: first, the motor slowly and continuously rotates in the reverse direction; Secondly, after the magnetic field generating unit is aligned with 1 / N of the wind wheels (3), the magnetic field generating unit heats 1 / N of the wind wheels (3) to a specified temperature and maintains the temperature for a period of time t.

3. A fan assembly according to claim 2, characterized in that: The motor and the magnetic field generating unit are arranged in a staggered manner.

4. A fan assembly according to claim 2, characterized in that: The magnetic field generating part is an electromagnetic heating coil fixedly arranged on the outside of the shell (1), and the magnetic lines of force generated by the electromagnetic heating coil put the wind wheel (3) in a first state; the electromagnetic heating coil is a coil disk (5), and the coil disk (5) is fixedly connected to the outside of the shell (1), and the coil disk (5) is arranged at the shell near the vortex tongue, and the distance between the coil disk (5) and the wind wheel blade formed at this location is 0.5 to 1.5 centimeters.

5. A fan assembly according to claim 2, characterized in that: The shell (1) and the support frame (34) are provided with water spray ports, the bottom of the shell (1) is provided with a sewage collecting tank, and the sewage collecting tank is connected to a sewage discharge pipe.

6. A household appliance, comprising a contaminated area, characterized in that: The invention comprises the fan assembly according to any one of claims 1 to 5, wherein the fan assembly is arranged in a polluted area.

7. A range hood, comprising an air duct, characterized in that: The fan assembly described in any one of claims 1 to 5 is fixedly installed in the air duct, and the air duct includes an air inlet duct connected to the air inlet of the fan assembly and an exhaust duct connected to the air outlet of the fan assembly, and a check valve is arranged on the exhaust duct.

8. The range hood according to claim 7, characterized in that: Also includes, A machine body, wherein the fan assembly is connected to the machine body and is suitable for generating airflow; An oil fume collecting hood, the oil fume collecting hood is connected to the machine body, and the air inlet duct is arranged between the oil fume collecting hood and the fan assembly; An oil storage box is used to collect waste oil generated by filtering the range hood.

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