阅读说明：本技术 叶轮装置、离心风机、吸油烟机及其控制方法 (Impeller device, centrifugal fan, range hood and control method thereof ) 是由 时璐璐 于 2021-09-14 设计创作，主要内容包括：本发明涉及一种叶轮装置、离心风机、吸油烟机及其控制方法,叶轮装置包括中盘、前端圈、后端圈和若干弯曲的叶片,该若干叶片间隔地设置在中盘上,叶片的前端紧固在前端圈上,叶片的后端紧固在后端圈上,而且,该叶轮装置还包括对叶片的前端部和后端部中的至少一个端部进行加热的加热部件,叶片的该至少一个端部与其对应紧固的端圈之间形成有随该至少一个端部温度变化而发生变化的配合间隙。通过加热部件对叶片端部的加热,使得叶片的该端部因受热后发生形变,进而改变了该端部与对应紧固的端圈之间紧固时的配合间隙,从而进一步达到通过调整改变叶片端部与对应端圈之间配合时的间隙调整叶轮预紧力的效果,消除了工作中的叶轮装置因预紧力不均而引起的啸叫异音。(The invention relates to an impeller device, a centrifugal fan, a range hood and a control method thereof, wherein the impeller device comprises a middle disc, a front end ring, a rear end ring and a plurality of bent blades, the blades are arranged on the middle disc at intervals, the front ends of the blades are fastened on the front end ring, the rear ends of the blades are fastened on the rear end ring, the impeller device further comprises a heating component for heating at least one of the front end part and the rear end part of the blades, and a fit clearance which changes along with the temperature change of the at least one end part is formed between the at least one end part of the blades and the end ring which is fastened correspondingly. The end parts of the blades are heated by the heating parts, so that the end parts of the blades are deformed after being heated, the fit clearance between the end parts and the corresponding fastened end rings is changed, the effect of adjusting the pretightening force of the impeller by adjusting the clearance when the end parts of the blades and the corresponding end rings are matched is further achieved, and squeaking abnormal sounds caused by uneven pretightening force of the impeller device in work are eliminated.)

1. Impeller device, comprising:

a middle disc (11);

a front end ring (12) located at the front end of the middle disc (11);

a rear end ring (13) located at the rear end of the middle disc (11);

the blades (14) are arranged on the middle disc (11) at intervals, the front end parts of the blades (14) are fastened on the front end ring (12), and the rear end parts of the blades (14) are fastened on the rear end ring (13);

the blade is characterized by further comprising a heating component (15) for heating at least one of the front end part and the rear end part of the blade (14), and a fit clearance which changes along with the temperature change of the at least one end part is formed between the at least one end part of the blade (14) and the end ring which is fastened correspondingly.

2. The impeller device according to claim 1, characterized in that the at least one end of the blade (14) is of a memory alloy material.

3. An impeller device according to claim 1 or 2, characterized in that the blades (14) are curved, the heating means (15) being arranged on the side of the blades (14) that is curved inwards.

4. The impeller device according to claim 1 or 2, characterized in that the at least one end of the blade (14) is fastened to the end ring of the corresponding side by means of a snap-fit construction.

5. The impeller device according to claim 4, characterized in that the at least one end of the blade (14) is provided with a catch (141), and the end ring which is in tight fit with the at least one end is provided with a catch groove (10) into which the catch (141) is fitted.

6. The impeller device according to claim 5, characterized in that the edges of said slots (10) are formed with apertures (101).

7. An impeller device according to any one of claims 1 to 3, further comprising a processor connected to the heating member.

8. Centrifugal fan comprising a volute (2) and an electric motor (3), characterized in that an impeller device (1) according to any one of claims 1 to 7 is applied.

9. A range hood, characterized in that the centrifugal fan of claim 8 is applied.

10. The range hood of claim 9, comprising:

the signal detection device (31) is positioned in the volute (2) and is used for detecting a vibration signal at the bottom of the volute;

and the controller (32) is connected with the signal detection device (31) and controls the heating component (15) in a direct or indirect mode, and generates a control command for controlling the heating operation of the heating component (15) according to the vibration signal detected by the signal detection device (31).

11. The range hood according to claim 9, further comprising a temperature detection device (33) for detecting the temperature of the blade (14), wherein the temperature detection device (33) is connected with the controller (32) in a direct or indirect way.

12. A control method of a range hood, applied to the range hood of any one of claims 9 to 11, characterized by comprising the following steps:

step S1, detecting a vibration signal at the bottom of a volute of the range hood;

step S2, extracting a first target vibration signal located in a first preset frequency range and a second target vibration signal located in a second preset frequency range from the detected vibration signals, respectively;

step S3, a judgment process is made on the extraction condition of the first target vibration signal:

when a first target vibration signal is extracted and the amplitude of the first target vibration signal is greater than a first preset amplitude value, heating parts in the impeller device are not started to heat; otherwise, go to step S4;

step S4, a judgment process is made on the extraction condition of the second target vibration signal:

when a second target vibration signal is extracted and the amplitude of the second target vibration signal is larger than a second preset amplitude value, enabling a heating component in the impeller device to start heating; otherwise, the heating component in the impeller device is not started to heat.

13. The range hood control method of claim 12, further comprising: after the heating operation of the heating member in the impeller device is started, the process proceeds to step S1 again.

Technical Field

The invention relates to the field of range hoods, in particular to an impeller device, a centrifugal fan, a range hood and a control method of the range hood.

Background

When the range hood works, the oil smoke is sucked and exhausted by the centrifugal fan arranged in the range hood. The centrifugal fan in the range hood comprises a volute, an impeller arranged in the volute and a motor driving the impeller to rotate, wherein a plurality of blades are arranged on the impeller. When the motor drives the impeller to rotate, the pressure at the center of the impeller is reduced and the pressure is lower than the atmospheric pressure, the oil smoke below the range hood is sucked into the fan under the action of the pressure difference, is then accelerated by the fan and is collected by the volute, and is guided to be discharged outdoors.

The Chinese patent application CN111664117A discloses an intelligent regulation impeller device, a fan and a range hood, wherein the impeller device comprises a first cover plate, a middle disc, a second cover plate, a plurality of fan blades, an inner disc and a driving device, wherein the first cover plate, the middle disc and the second cover plate are arranged at intervals, the plurality of fan blades are circumferentially arranged at intervals and movably arranged between the first cover plate and the second cover plate, the fan blades penetrate through the middle disc, the inner disc is arranged in the middle disc, the outer edge of the inner disc is matched with the plurality of fan blades, the driving device is connected with the inner disc and is used for driving the inner disc to rotate so as to regulate the inlet angle and/or the outlet angle of the fan blades, the structure is simple, and the noise generated when the impeller device works can be remarkably reduced.

However, the solution of the above patent application CN111664117A for reducing the noise generated by the impeller device during operation also has the following disadvantages: in the working process of the range hood, the impeller has rigidity fluctuation due to the pretightening force difference between the blades of the impeller and the impeller center plate, so that the distribution of the modal frequency of the impeller is influenced, the modal frequency of the impeller of the centrifugal fan is close to the modal frequency of a fan system to generate resonance, the resonance can cause the range hood to generate squeaking abnormal sound, and the use experience effect of a user is influenced.

Disclosure of Invention

The first technical problem to be solved by the present invention is to provide an impeller device capable of adjusting the pre-tightening force of the blades in view of the above prior art.

A second technical problem to be solved by the present invention is to provide a centrifugal fan having the above impeller device, in view of the above prior art.

The third technical problem to be solved by the present invention is to provide a range hood using the centrifugal fan in view of the above prior art.

The fourth technical problem to be solved by the present invention is to provide a control method of the above range hood, aiming at the above prior art.

The technical scheme adopted by the invention for solving the first technical problem is as follows: impeller device, comprising:

a middle disc;

the front end ring is positioned at the front end of the middle disc;

the rear end ring is positioned at the rear end of the middle disc;

the blades are arranged on the middle disc at intervals, the front end parts of the blades are fastened on the front end ring, and the rear end parts of the blades are fastened on the rear end ring;

the blade is characterized by further comprising a heating component for heating at least one of the front end part and the rear end part of the blade, and a fit clearance which changes along with the temperature change of the at least one end part is formed between the at least one end part of the blade and the end ring which is fastened correspondingly.

In the invention, the end part of the blade is heated by the heating component, so that the end part of the blade is deformed after being heated, and the fit clearance between the end part and the corresponding fastened end ring is further changed, thereby further achieving the effect of adjusting the pre-tightening force of the impeller by adjusting and changing the clearance between the end part of the blade and the corresponding end ring, and eliminating squeaking noise caused by uneven pre-tightening force of the impeller device in work.

In particular, in this invention, the at least one end of the blade is preferably made of a memory alloy material. Therefore, corresponding parameters are set for the memory alloy material in advance, and after the end part is heated by the heating component, the fit clearance between the memory alloy material and the corresponding end ring is adjusted to be a larger clearance from an initial small clearance, so that the effect of adjusting the pretightening force of the impeller is achieved.

In the impeller device, the blades are curved, and the heating member is disposed on a side of the blades curved inward.

As a fastening fit between the at least one end of the blade and the corresponding end ring, in this invention, the at least one end of the blade is fastened to the end ring on the corresponding side by a snap-fit structure.

Further, the at least one end of the blade is provided with a buckle, and a clamping groove matched with the buckle in a clamping mode is formed in the end ring in fastening fit with the at least one end.

In order to avoid concentrated stress between the buckles on the blades and the clamping grooves on any end ring, the impeller device is improved, and holes are formed on the edges of the clamping grooves. For example, the gap may extend in the direction in which the card slot is formed.

In order to control the heating operation of the self heating component by the impeller device, in the invention, the impeller device further comprises a processor which is connected with the heating component. Therefore, the heating part can be controlled to start or stop heating through the processor of the impeller device, so that the pre-tightening force when the blades are matched with the corresponding end rings can be adjusted in time.

The technical scheme adopted by the invention for solving the second technical problem is as follows: centrifugal fan, including spiral case and motor, characterized by, has the impeller device of any one.

The technical scheme adopted by the invention for solving the third technical problem is as follows: the range hood is characterized in that the centrifugal fan is applied.

In an improved aspect, in the present invention, the range hood further includes:

the signal detection device is positioned in the volute and is used for detecting a vibration signal at the bottom of the volute;

and the controller is connected with the signal detection device and controls the heating part in a direct or indirect mode, and generates a control instruction for controlling the heating operation of the heating part according to the vibration signal detected by the signal detection device.

Furthermore, the range hood in the invention also comprises a temperature detection device for detecting the temperature of the blades, and the temperature detection device is connected with the controller in a direct or indirect mode.

The technical scheme adopted by the invention for solving the fourth technical problem is as follows: the range hood control method is applied to the range hood and is characterized by comprising the following steps of:

step S1, detecting a vibration signal at the bottom of a volute of the range hood;

step S2, extracting a first target vibration signal located in a first preset frequency range and a second target vibration signal located in a second preset frequency range from the detected vibration signals, respectively;

step S3, a judgment process is made on the extraction condition of the first target vibration signal:

when a first target vibration signal is extracted and the amplitude of the first target vibration signal is greater than a first preset amplitude value, heating parts in the impeller device are not started to heat; otherwise, go to step S4;

step S4, a judgment process is made on the extraction condition of the second target vibration signal:

when a second target vibration signal is extracted and the amplitude of the second target vibration signal is larger than a second preset amplitude value, enabling a heating component in the impeller device to start heating; otherwise, the heating component in the impeller device is not started to heat.

In order to ensure that the blades in the impeller device are in clearance fit with the end rings in the working process of the range hood and eliminate squealing noise caused by pretightening force between the blades and the end rings, the control method of the range hood further comprises the following steps: after the heating operation of the heating member in the impeller device is started, the process proceeds to step S1 again. Therefore, whether the squeaking abnormal sound occurs or not can be continuously detected, so that the pretightening force between the blades and the end ring is continuously adjusted in the working process of the range hood, and the squeaking abnormal sound is eliminated.

Compared with the prior art, the invention has the advantages that:

firstly, in the impeller device, the end part of the blade is heated by the heating part, so that the end part of the blade is deformed after being heated, and the fit clearance between the end part and the end ring which is correspondingly fastened is changed, thereby further achieving the effect of adjusting the pre-tightening force of the impeller by adjusting and changing the clearance between the end part of the blade and the end ring which is correspondingly fastened, and eliminating squeaking noise caused by uneven pre-tightening force of the impeller device in work.

Secondly, after the impeller device is applied to a centrifugal fan and the centrifugal fan is applied to a range hood, the effect of adjusting the pretightening force of the impeller by adjusting the gap between the blades and the end ring in matching can be timely adjusted, the squealing abnormal sound caused by uneven pretightening force of the impeller device in work is eliminated, and the effect of effectively reducing noise (eliminating the squealing abnormal sound) is achieved.

Drawings

FIG. 1 is a schematic structural diagram of an impeller device according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the impeller device shown in FIG. 1;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a schematic view of the structure of FIG. 2 at another angle;

FIG. 5 is an enlarged view of portion B of FIG. 4;

FIG. 6 is a schematic view of a blade configuration;

FIG. 7 is a schematic structural view of a front end ring;

FIG. 8 is an enlarged schematic view of section C of FIG. 7;

fig. 9 is a schematic structural diagram of a range hood according to an embodiment of the present invention;

fig. 10 is a schematic view showing the connection of the main components in the range hood according to the embodiment of the present invention;

fig. 11 is a flow chart illustrating a control method of the range hood according to the embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

The embodiment provides an impeller device suitable for a range hood. Specifically, referring to fig. 1 and 2, the impeller device 1 of this embodiment includes a central disc 11, a front end ring 12, a rear end ring 13, and a plurality of curved blades 14, the front end ring 12 being located at the front end of the central disc 11, the rear end ring 13 being located at the rear end of the central disc 11; the blades 14 are made of memory alloy materials, parameters of the memory alloy materials can be set and adjusted in advance, heating parts 15 capable of heating the front end parts and the rear end parts of the blades 14 are arranged on the blades 14 on the inwards bent sides of the blades 14, the heating parts 15 are in the forms of heating wires or heating sheets, and the heating parts 15 are controllable in heating operation; the plurality of blades 14 are arranged on the central disc 11 at intervals, the front end portions of the blades 14 are fastened on the front end ring 12, and the rear end portions of the blades 14 are fastened on the rear end ring 13, for example, as shown in fig. 3 to 7, the front end portions and the rear end portions of the blades 14 are both provided with buckles 141, the front end ring 12 and the rear end ring 13 are both provided with clamping grooves 10 into which the buckles 141 of the corresponding end portions of the blades 14 are matched, and thus, each buckle 141 is mutually buckled and matched with the corresponding clamping groove 10. When the heating component 15 is not started to heat, the blades 14 and at least one of the front end ring 12 and the rear end ring 13 have a small fit clearance, such as an interference fit clearance; after the heating element 15 is activated to heat, the blade 14 is in a large clearance fit with the at least one end ring. Specifically, in this embodiment, as the front end portion and the rear end portion of the blade are heated by the heating member and the temperature thereof increases, the fitting clearance when the front end portion of the blade is fastened to the front end ring and the fitting clearance when the rear end portion of the blade is fastened to the rear end ring are gradually increased. Of course, when the heating component is not started to heat, the fit between the front end part of the blade and the front end ring and the fit between the rear end part of the blade and the rear end ring are interference fit; as the heating member is heated, the temperatures of the front end part and the rear end part of the blade are increased, and then the fit between the front end part of the blade and the front end ring and the fit between the rear end part of the blade and the rear end ring are gradually changed into clearance fit with larger clearance. In this embodiment, the range of interference X at the time of interference fit between the blade and the corresponding end ring is set to [0.5mm,1mm ]. The structure of the blade is shown in fig. 3, the fitting relationship between the blade (actually, the front end portion and the rear end portion thereof) and the front end ring and the rear end ring can be shown in fig. 4 and fig. 5, wherein fig. 6 shows a schematic view of a state when the snap-fit relationship between the blade and the end ring is adjusted to be clearance fit, and the range of the clearance amount Y when the blade and the corresponding end ring are clearance fit is set to [0.5mm,1mm ].

In order to avoid concentrated stress between the catches on the blades and the catches on the corresponding end rings, in this embodiment, as shown in fig. 7 and 8, apertures 101 are formed in the edges of the catches 10. For example, the gap 101 may extend along the forming direction of the card slot 10.

In order to control the heating operation of the self-heating component by the impeller device, the impeller device 1 of this embodiment may further be provided with a processor (not shown in the figure), and the processor is connected with the heating component on the blade. Therefore, after the heating component is connected to the power supply device, the heating component can be controlled to start or stop heating through the processor of the impeller device, and the pre-tightening force when the blades and the end rings are matched is adjusted in time.

In order to timely control the heating operation of the heating component according to the temperature condition of the blade, the impeller device of the embodiment is additionally provided with a temperature detection device (not shown in the figure) for detecting the temperature of the end part of the blade 14, and the temperature detection device is connected with the processor. Thus, after the processor determines that the temperature detected by the temperature detecting device exceeds the preset temperature value, the processor commands the heating part 15 to stop heating; if the processor determines that the temperature detected by the temperature detecting means does not exceed the preset temperature value, it commands the heating part 15 to continue the heating operation.

In the impeller device of the embodiment, the end part of the blade is heated by the heating part, so that the end part of the blade is deformed after being heated, and the fit clearance between the end part and the corresponding fastened end ring is changed, the effect of adjusting the pretightening force of the impeller by adjusting the clearance when the end part of the blade is matched with the corresponding end ring is further achieved, and squeaking noise caused by uneven pretightening force of the impeller device in work is eliminated.

This embodiment also provides a centrifugal fan. Specifically, the centrifugal fan of this embodiment includes the above-described impeller device 1, the scroll casing 2, and the motor 3, and the impeller device 1 is disposed inside the scroll casing 2. After the centrifugal fan is applied to the range hood, the effect of adjusting the pretightening force of the impeller by the gap when the blades and the end ring are matched can be timely adjusted, the squealing noise caused by uneven pretightening force of the impeller device in work is eliminated, and the effect of effectively reducing noise (eliminating the squealing noise) is achieved.

The embodiment also provides a range hood. Specifically, referring to fig. 9, the range hood of this embodiment is applied with the centrifugal fan as described above, and further includes a signal detection device 31 and a controller 32, the signal detection device 31 is located in the volute 2, and the signal detection device 31 detects a vibration signal at the bottom of the volute; the controller 32 is connected to the signal detection device 31, and the controller 32 controls the heating member 15 directly or indirectly, and generates a control command for controlling the heating operation of the heating member 15 according to the vibration signal detected by the signal detection device 31. For example, the controller 32 may be directly connected to the controlled heating unit 15, and then the generated control command is used to control the heating unit to start or stop the heating operation. Of course, the controller 32 may be connected to a processor provided on the impeller device 1, so that the controller 32 sends a control command to the processor, and the processor controls the heating element to start or stop the heating operation.

In order to timely control the heating operation of the heating component according to the temperature condition of the blade, the range hood of this embodiment is further provided with a temperature detection device 33 for detecting the temperature of the blade 14, the temperature detection device 33 may be disposed at a position close to the blade, and then the temperature detection device 33 is connected to the controller 32. The connection of the controller, the signal detection device and the temperature detection device in this embodiment is shown in fig. 10.

Of course, the temperature detection device 33 may not be provided, and the temperature detection device originally provided in the impeller device may be directly used, and the controller 32 may be connected to the temperature detection device provided in the impeller device directly or indirectly.

In addition, the embodiment also provides a control method of the range hood, and particularly provides a control method for eliminating squeal and abnormal sound by controlling and adjusting the pretightening force of the impeller device. Referring to fig. 11, the range hood control method in this embodiment includes the following steps:

step S1, detecting a vibration signal at the bottom of a volute of the range hood;

step S2, extracting a first target vibration signal located in a first preset frequency range and a second target vibration signal located in a second preset frequency range from the detected vibration signals, respectively; wherein, in this embodiment, the first preset frequency range is [110Hz, 190Hz ], and the first target vibration signal located in the first preset frequency range [110Hz, 190Hz ] is assumed to be labeled as s 1; the second preset frequency range is [450Hz, 800Hz ], and a second target vibration signal which is assumed to be located in the second preset frequency range [450Hz, 800Hz ] is marked as s 2;

step S3, determination processing is made on the extraction condition of the first target vibration signal S1:

when the first target vibration signal s1 is extracted and the amplitude A of the first target vibration signal s1 is_s1Greater than a first predetermined amplitude value A₁When the impeller device is used, the heating component in the impeller device is not started to heat; otherwise, go to step S4;

step S4, determination processing is made on the extraction condition of the second target vibration signal S2:

when the second target vibration signal s2 is extracted and the amplitude A of the second target vibration signal s2 is_s2When the amplitude value is larger than a second preset amplitude value A2, enabling a heating part in the impeller device to start heating; otherwise, the heating component in the impeller device is not started to heat. Wherein, the first preset amplitude value A in this embodiment₁Is equal to a second preset amplitude value A2, and is set to be 0.5m/s²。

Certainly, in the working process of the range hood, in order to ensure that the blades in the impeller device are in clearance fit with the end rings and eliminate squeal noise caused by the pretightening force between the blades and the end rings, the range hood control method in this embodiment further includes: after the heating operation of the heating member in the impeller device is started, the process proceeds to step S1 again. Therefore, whether the squeaking abnormal sound occurs or not can be continuously detected, so that the pretightening force between the blades and the end ring is continuously adjusted in the working process of the range hood, and the squeaking abnormal sound is eliminated.