CN110553297B

CN110553297B - Control method of range hood and range hood

Info

Publication number: CN110553297B
Application number: CN201910945398.9A
Authority: CN
Inventors: 颜雪平
Original assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Current assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2021-03-19
Anticipated expiration: 2039-09-30
Also published as: CN110553297A

Abstract

The invention discloses a control method of a range hood and the range hood. The range hood comprises a fan. The control method comprises the following steps: controlling the fan to operate in a first state and recording the first corresponding relation between the air volume of the fan at each gear and the first current; controlling the fan to operate in a second state and recording a second corresponding relation between the maximum wind pressure and the second current of the fan at each gear; and controlling the fan to operate according to the input fan gear information, the first corresponding relation and the second corresponding relation. According to the control method and the range hood, before the range hood is used, parameters such as current, air volume and maximum air pressure in different states are calculated, air channels in different users can be automatically adapted to, and the difference of performance of the range hood caused by different air channel blocking conditions in different users is avoided.

Description

Control method of range hood and range hood

Technical Field

The invention relates to the technical field of kitchen appliances, in particular to a control method of a range hood and the range hood.

Background

The range hood is generally used to rapidly exhaust wastes burned by a range and oil smoke harmful to a human body generated in a cooking process to the outside, thereby reducing indoor pollution and purifying air. In the related technology, the parameters of the range hood are calibrated in an ideal state, and the difference between the actual performance of the range hood and the calibration parameters caused by the difference of elements such as a fan, an air duct and an impeller of the range hood in mass production when the range hood is actually used by a user and the wind air performance is not considered.

Disclosure of Invention

The embodiment of the invention provides a control method of a range hood, the range hood and a computer readable storage medium.

The control method of the range hood provided by the embodiment of the invention comprises the following steps:

controlling the fan to operate in a first state and recording a first corresponding relation between the air volume and a first current of the fan at each gear;

controlling the fan to operate in a second state and recording a second corresponding relation between the maximum wind pressure and a second current of the fan at each gear;

and controlling the fan to operate according to the input fan gear information, the first corresponding relation and the second corresponding relation.

According to the control method of the range hood, before use, parameters such as current, air volume and maximum air pressure in different states are calculated, automatic adaptation to air channels in the homes of users can be achieved, and differences of performance of the range hood caused by different air channel blocking conditions in different homes of users are avoided.

In some embodiments, the first state is a fully open state of an air outlet of the range hood, and controlling the fan to operate in the first state and recording a first corresponding relationship between the air volume and the current of the fan at each gear includes:

controlling the fan to operate at a constant rotating speed and a plurality of preset rotating speeds in the first state respectively;

recording a third corresponding relation among the air volume, the rotating speed and the current when the fan runs at each preset rotating speed;

and determining and recording the first corresponding relation according to the air volume of each set gear of the range hood and the third corresponding relation.

Therefore, the current value of each gear of the range hood in control in actual use can be obtained by testing in the first state.

In some embodiments, the second state is a fully blocked state of the air outlet of the range hood, and the controlling the fan to operate in the second state and recording the second corresponding relationship between the current and the air pressure of the fan at each gear includes:

controlling the fan to operate at each set gear in the second state;

and recording the corresponding relation among the maximum wind pressure, the fan rotating speed and the second current of the fan running at each set gear to determine and record the second corresponding relation.

Therefore, the marginal current of the fan at each gear can be obtained by testing in the second state, and a proper fan current reference is provided for the control process under the condition that the air duct is blocked.

In some embodiments, the controlling the operation of the fan according to the input fan gear information, the first corresponding relationship, and the second corresponding relationship includes:

and controlling the fan to operate at the first current according to the input fan gear information and the first corresponding relation.

Therefore, in actual use, when a user selects a corresponding gear, the fan can be controlled to operate according to the current value corresponding to the gear tested and obtained in the first state.

detecting the variation trend of the rotating speed of the fan;

when the fan rotating speed is gradually increased, the current of the fan during operation is controlled to change from the first current to the second current.

So, can be according to the rotational speed of known marginal electric current and fan, at the actual control in-process, because when the windage is bigger and bigger, for guaranteeing the same amount of wind, when the rotational speed of fan was higher and higher, the electric current that can control the fan was gradually to critical current transition to prevent the sudden change of fan current when reaching maximum wind pressure.

The embodiment of the invention provides a range hood, which comprises a processor and a fan, wherein the processor is connected with the fan and is used for:

The lampblack absorber of this application embodiment, before the use, calculate electric current, amount of wind and maximum wind pressure isoparametric under the different states, can realize the wind channel of automatic adaptation user family, avoid the different difference that leads to the lampblack absorber performance of wind channel logical stifled condition in the different users family.

In some embodiments, the first state is a fully open state of an air outlet of the range hood, and the processor is configured to:

In some embodiments, the second state is a fully blocked state of the air outlet of the range hood, and the processor is configured to:

controlling the fan to operate at each set gear in the second state;

In certain embodiments, the processor is configured to:

detecting the variation trend of the rotating speed of the fan;

So, can be according to the rotational speed of known marginal electric current and fan, at the actual control in-process, because when the windage is bigger and bigger, for guaranteeing the same amount of wind, when the rotational speed of fan was higher and higher, the electric current that can control the fan was gradually to critical current transition to prevent the sudden change of fan electric current when reaching maximum wind pressure.

Embodiments of the present invention provide a non-transitory computer-readable storage medium containing computer-executable instructions that, when executed by one or more processors, cause the processors to perform the control method of any of the above embodiments.

When the instructions in the computer-readable storage medium of the embodiment are executed, the parameters such as current, air volume and maximum air pressure of the range hood in different states are calculated before the range hood is used, so that the range hood can automatically adapt to air ducts in the homes of users, and the difference of performance of the range hood caused by different air duct blocking conditions in different homes of users is avoided.

Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic flow chart of a control method according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a range hood according to an embodiment of the present invention;

FIG. 3 is a schematic block diagram of a range hood according to an embodiment of the present invention;

FIG. 4 is a schematic flow chart of a control method according to another embodiment of the present invention;

FIG. 5 is a schematic flow chart of a control method according to yet another embodiment of the present invention;

FIG. 6 is a flow chart illustrating a control method according to still another embodiment of the present invention;

FIG. 7 is a schematic flow chart of a control method according to another embodiment of the present invention;

FIG. 8 is a further schematic structural view of a range hood of an embodiment of the present invention;

fig. 9 is a schematic structural view of a check valve assembly of a range hood according to an embodiment of the present invention;

FIG. 10 is a plan sectional view of the check valve assembly of FIG. 9 taken along the direction L-L;

fig. 11 is an enlarged view of portion I of fig. 10;

fig. 12 is an enlarged view of a portion II of fig. 10;

fig. 13 is a schematic structural diagram of a smoke detection assembly according to an embodiment of the present invention;

fig. 14 is a schematic view of the construction of a sealing plug of an embodiment of the invention;

fig. 15 is a schematic structural view of a range hood according to another embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

The following disclosure provides many different embodiments or examples for implementing different configurations of embodiments of the invention. In order to simplify the disclosure of embodiments of the invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, embodiments of the invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, embodiments of the present invention provide examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

Referring to fig. 1 and 2, a control method according to an embodiment of the present invention is applied to a range hood. The range hood comprises a fan.

The control method comprises the following steps:

s10, controlling the fan to operate in a first state and recording a first corresponding relation between the air volume of the fan at each gear and the first current;

s20, controlling the fan to operate in a second state and recording a second corresponding relation between the maximum wind pressure and the second current of the fan at each gear;

and S30, controlling the fan to operate according to the input fan gear information, the first corresponding relation and the second corresponding relation.

Referring to fig. 3, a range hood 100 according to an embodiment of the present invention includes a fan 34 and a processor 101. The processor 101 is connected to the blower 34. The processor 101 is configured to control the fan 34 to operate in a first state and record a first corresponding relationship between an air volume and a first current of the fan 34 in each gear, control the fan 34 to operate in a second state and record a second corresponding relationship between a maximum air pressure and a second current of the fan 34 in each gear, and control the fan 34 to operate according to the input fan gear information, the first corresponding relationship, and the second corresponding relationship.

That is, the control method of the embodiment of the present invention may be implemented by the range hood 100 of the embodiment of the present invention. Specifically, the control method according to the embodiment of the present invention may be implemented by the processor 101.

Before the range hood 100 and the control method provided by the embodiment of the invention are used, parameters such as current, air volume, maximum air pressure and the like in different states are calculated in a test state, so that the range hood can automatically adapt to air channels in different homes of users, and the difference of performance of the range hood caused by different air channel blockage situations in different homes of users is avoided.

Specifically, the processors, fans, impellers, air ducts, and the like of the range hoods 100 of the same model may also differ in mass production, thereby affecting the air performance of the air ducts. For example, because a certain sampling resistor of the processor is small, and the actually measured current is large, the actual rotating speed of the fan corresponding to the control current is low, the air volume calculation result is high, and otherwise, the calculation result is low. If the output of the fan is reduced, the actual rotating speed of the fan corresponding to the control current is lower, the air volume calculation result is higher, and otherwise, the calculation result is lower. If the weight of the impeller becomes heavy, the actual rotating speed of the fan corresponding to the control current is lower, the air volume calculation result is higher, and otherwise, the calculation result is lower. If the air duct is blocked, the control current is relatively low corresponding to the actual air quantity, the rotating speed is relatively high, the calculation result is relatively large, and otherwise, the calculation result is relatively low. For the above effects, the system may be deviated when the fan control is performed.

In view of the above situation, in the embodiment of the present application, before the user purchases the range hood 100 and uses the range hood 100 formally, the range hood 100 is controlled to operate in the first state and the second state, so as to obtain a series of test parameters, and it can be understood that the parameters obtained through the test are the actual conditions of the range hood, and the electrical parameters adapted to the range hood 100 are obtained by taking the foregoing various error factors that may exist into consideration. For example, the corresponding relationship between the parameters of the air outlet machine 34 such as air pressure, air volume, current and the like at different rotation speeds is tested. In the subsequent actual use process, the fan 34 can provide appropriate driving parameters after being started, so that the air volume of the fan 34 meets the requirement.

The testing of the range hood 100 in different states can be set to be a functional mode of the range hood 100, when the testing is started, a user sends a testing mode command to the processor 101 by operating the control panel, the range hood 100 enters the testing mode, the fan is started, the bus voltage is collected and calculated, and if the bus voltage is detected to be too high or too low, the fan 34 is closed. And performing other protection detection, such as reverse rotation prevention, current protection, rotation speed limitation, power limitation and the like. And then checks to see if the current state of the fan 34 is off or running. If the fan 34 is in the shutdown state, the fan 34 fails to start, the system operation is directly finished, and if the fan 34 is successfully started, the fan 34 is controlled to operate in the first state and information acquisition such as rotating speed and current is carried out.

Referring to fig. 4, in some embodiments, the first state is a full open state of an air outlet of the range hood, and S10 includes:

s11: controlling the fan to operate at a plurality of preset rotating speeds respectively in a first state at a constant rotating speed;

s12: recording a third corresponding relation between the air volume, the rotating speed and the current when the fan runs at each preset rotating speed;

s13: and determining and recording the first corresponding relation according to the air volume of each set gear of the range hood and the third corresponding relation.

In some embodiments, the processor 101 is configured to control the fan 34 to operate at a constant rotation speed in the first state at a plurality of predetermined rotation speeds, respectively, and to record a third corresponding relationship between the air volume, the rotation speed and the sum current of the fan 34 when operating at each predetermined rotation speed, and to determine and record the first corresponding relationship according to the air volume and the third corresponding relationship of each set gear of the range hood 100.

Specifically, when carrying out first state test to lampblack absorber 100, need not to accomplish the fan installation, place the mesa in open space with lampblack absorber 100 tie lying, ensure that air outlet department does not have obvious barrier interface for the air outlet blows to the air can, also is the air outlet full open state. The fan 34 is controlled to operate at a plurality of predetermined speeds, for example, beginning at 300 rpm and recording as a gear increment every 50 revolutions until the maximum fan revolution is reachedAnd the speed is operated at a constant rotating speed in each rotating speed gear, and after the data are stabilized, a corresponding current value is recorded, so that the corresponding relation between the rotating speed and the current value of the range hood 100 is obtained. Further, the air volume and the rotation speed have a corresponding relationship in the first state, for example, the air volume is 15m³The fan speed per minute corresponds to 800 revolutions per minute, for example 17m³The rotational speed per minute corresponds to 1000 revolutions per minute. Thus, the corresponding relation among the air volume, the rotating speed and the current, namely, the third corresponding relation can be obtained.

It can be understood that the actual gear provided by the range hood 100 to the user is an air volume gear, for example, the air volume corresponding to the high gear is 18m³The air quantity of the middle gear is 15m per minute³The air quantity of a low gear is 12m per minute³In terms of a/minute. In some examples, if the air volume corresponding to the shift position provided by the range hood 100 happens to exist in the third corresponding relationship, the first corresponding relationship between the air volume of the set shift position of the range hood 100 and the first current may be directly formed. The determination mode is that the air volume of the set gear corresponds to the rotating speed in the third corresponding relation and further corresponds to the current, so that the first corresponding relation between the air volume of the set gear and the first current is formed.

In other examples, if the air volume corresponding to the shift position provided by the range hood 100 is not in the third corresponding relationship, the current value corresponding to the air volume of the set shift position may be obtained in a difference manner, so as to determine the first corresponding relationship. For example, the third corresponding relationship includes an air volume of 15m corresponding to 800 rpm³In one minute, the current is I₁And the air volume corresponding to 850 revolutions per minute is 17m³In one minute, the current is I₂And the plurality of sets of test values. If a certain set gear of the range hood 100 is 16m³And/min, the first current corresponding to the gear can be determined by means of the two sets of difference values.

The determined first correspondence relationship is stored in a memory of the range hood 100, for example, an Electrically Erasable Programmable Read Only Memory (EEPROM), and it can be understood that data is not lost after the EEPROM is powered down. And existing stored information can be erased and rewritten.

Referring to fig. 5, in this embodiment, the second state is a full-blocked state of the air outlet of the range hood, and S20 includes:

s21: controlling the fan to operate at each set gear in a second state;

s22: and recording the corresponding relation among the maximum wind pressure, the fan rotating speed and the second current of the fan running at each set gear to determine and record the second corresponding relation.

In some embodiments, the processor 101 is configured to control the fan 34 to operate in each of the set gears in the second state, and to record a corresponding relationship between a maximum wind pressure, a fan speed, and a second current of the fan 34 operating in each of the set gears to determine and record the second corresponding relationship.

Thus, when the test is performed in the second state, the marginal current of the fan 34 at each gear can be obtained, and a proper fan current reference is provided for the condition that the air duct is blocked in the control process.

Specifically, after the test in the first state is completed, the test in the second state is performed, the second test state is a state in which the air outlet is completely blocked, and this state can be simulated by completely blocking the air outlet of the check valve of the range hood 100. It can be understood that based on the principle of the fan, the formula is satisfied under the same wind resistance, and the air volume is equal to the air channel area and the rotation speed, and along with the progress of sucking the oil smoke, a large amount of oil smoke will be accumulated in the air channel, which is equal to the air channel area becoming small, so the fan 34 must increase the rotation speed to maintain the constant air volume. The wind pressure of the range hood 100 is the air pressure for sucking the oil smoke into the range hood, pushing the oil smoke into the flue and exhausting the oil smoke to the outside, along with the proceeding of the smoking process, under the condition of increasing blockage, the wind pressure may reach the maximum wind pressure, for one range hood 100, the wind pressure cannot be infinitely increased, in order to keep constant wind volume during the operation, the fan 34 can operate with constant torque, under the condition of increasing the rotating speed, the current can be reduced, the second current when the fan 34 reaches the maximum wind pressure is also the marginal current, that is, the second current value is the minimum value to which the current can be reduced, after the marginal current of each set gear is determined, in the actual use process, the fan can be controlled to gradually adjust towards the marginal current along with the increasing of the rotating speed after the wind channel of the fan 34 is blocked. Similarly to the first corresponding relationship, the second corresponding relationship is also prestored in the memory of the range hood 100 to be read in a subsequent use process and to control the fan 34.

Referring to fig. 6, in the present embodiment, S30 further includes:

s31: and controlling the fan to operate at a first current according to the input fan gear information and the first corresponding relation.

In some embodiments, the processor 101 is configured to control the fan to operate at a first current based on the input fan gear information and the first corresponding relationship.

Specifically, as described above, after the test is performed before the blower, the obtained first correspondence and second correspondence are stored in the memory. The range hood 100 can be used after being installed, in the using process, the first corresponding relation is read in the memory according to the air quantity gear input by a user, and the fan 34 is driven to work with corresponding current according to the first corresponding relation. It can be understood that the current value is adopted to drive the extension set to operate, so that the influence of the difference of a fan, an air channel, an impeller and a processor on the performance of air in mass production can be avoided.

Referring to fig. 7, in the present embodiment, S30 includes:

s32: detecting the variation trend of the rotating speed of the fan;

s33: when the rotating speed of the fan is gradually increased, the current for controlling the fan to run is changed from the first current to the second current.

In some embodiments, the processor 101 is configured to detect a trend of a change in the rotational speed of the fan 34, and to control the current of the fan to change from the first current to the second current when the rotational speed of the fan is gradually increased.

So, can be according to known marginal electric current and the rotational speed of fan 34, in actual control process, because when the windage is bigger and bigger, in order to guarantee the same amount of wind, when the rotational speed of fan 34 was higher and higher, can control the electric current of fan 34 and gradually transition to critical current to prevent the sudden change of fan 34 electric current when reaching maximum wind pressure.

Specifically, the marginal current at the current air volume gear can be known through the second corresponding relation, and under the condition that the marginal current is predicted in advance, the current of the fan 34 can be controlled to gradually transit to the marginal current in the change process in the control process of the fan 34, and in the related art, because the marginal current cannot be predicted in advance, the current suddenly changes and suddenly decreases when the maximum air pressure is reached in the operation process, so that the user experience is poor.

A non-transitory computer-readable storage medium containing computer-executable instructions that, when executed by one or more processors, cause the processors to perform the control method of any of the above embodiments of the present invention.

When the instruction in the storage medium of the embodiment of the invention is executed, before the range hood 100 is used, in a test state, parameters such as current, air volume, maximum air pressure and the like in different states are calculated, so that the automatic adaptation to air ducts in different users can be realized, and the difference of the performance of the range hood caused by different air duct blockage situations in different users is avoided.

Referring to fig. 2 and 8, fig. 2 is a schematic structural diagram illustrating a range hood 100 according to an embodiment of the present invention, and in the example of fig. 2, the range hood 100 is an upper range hood 100. It is understood that in other embodiments, the range hood 100 may be a lower discharge range hood 100 or a side discharge range hood 100, etc., and is not limited thereto. Hereinafter, a detailed description will be given of an example in which the range hood 100 is an updraft range hood 100. The range hood 100 of the embodiment of the present invention may be a variable frequency range hood.

The range hood 100 of the embodiment of the invention comprises a flow guide plate assembly 10, a box body 20 and a check valve assembly 410, wherein the check valve assembly 410 comprises a check valve 40, the box body 20 is arranged on the flow guide plate assembly 10, the flow guide plate assembly 10 comprises a touch key 12, after the touch key 12 is triggered, the range hood 100 is opened, and oil smoke particles 110 can enter the box body 20 from the flow guide plate assembly 10. A fan assembly 30 is disposed within the housing 20, the fan assembly 30 including a volute 32 and a fan 34 disposed within the volute 32. The soot particles 110 enter the volute 32 by the centrifugal force of the impeller of the fan 34, and the soot particles 110 can be discharged from the air outlet channel of the volute 32. A check valve 40 is connected to the top 22 of the housing 20 and to the outlet of the outlet duct of the volute 32. The soot particles 110 can be discharged from the outlet of the volute 32 through the check valve 40 and into the smoke tube or flue.

It is understood that the check valve 40 is a valve in which the opening and closing member is a circular flap and operates by its own weight and pressure of the medium to block the reverse flow of the medium. The check valve 40 may be a lift check valve and a swing check valve. In the present embodiment, the soot particles 110 enter the check valve 40 after being discharged from the outlet of the air outlet passage of the scroll casing 32, and the valve of the check valve 40 is opened when the pressure of the inlet of the check valve 40 is greater than the sum of the weight of the flap of the check valve 40 and the rotational resistance thereof. The valve of the check valve 40 is closed when the soot particles 110 flow backward.

The range hood 100 of the embodiment of the present invention includes a smoke detection assembly 50, and the smoke detection assembly 50 is disposed at the check valve 40. In one embodiment, the smoke detection assembly 50 may be disposed on an outer wall of the check valve 40. In another embodiment, the smoke detecting assembly 50 may be provided at an inner wall of the check valve 40. In the embodiment of the present invention, the smoke detecting unit 50 is provided on the outer wall of the check valve 40. Of course, in other embodiments, the smoke detecting component 50 can also be disposed on the air outlet channel of the volute 32, and the smoke detecting component 50 can also be disposed on the air outlet channel of the volute 32 and the check valve 40.

Specifically, the soot detecting element 50 may be an infrared detecting element or a laser detecting element or include an organic molecule sensor, and the like, which is not limited herein. The following embodiments are described in detail with the lampblack detection component 50 as an infrared detection component.

The smoke detection assembly 50 includes a light emitting device 52 and a light receiving device 54. The light emitting device 52 is used for emitting light to the cooking fume duct of the check valve 40, and the light receiving device 54 is used for receiving the light emitted by the light emitting device 52 and outputting an electrical signal according to the received light. Typically, the soot particles 110 span a particle size of 100nm to 10 um. In one embodiment, when the soot particles 110 pass through the optical path of the infrared light emitted from the light emitting device 52, the soot particles 110 can block, scatter and diffract the infrared light, that is, the soot particles 110 in the check valve 40 can affect the intensity of the light emitted from the light emitting device 52 received by the light receiving device 54, so that the electrical signal output by the light receiving device 54 changes, the range hood 100 can control the operation of the fan 34 according to the electrical signal, so that the fan 34 can provide a proper amount of air to suck the soot particles 110 with soot, and the effect of sucking the soot particles 110 is good and the accuracy is high. In addition, the light receiving device 54 is disposed at an orientation on a side of the volute outlet biased, for example, the left side as viewed in fig. 8. Specifically, controlling the operation of the fan 34 may be understood as controlling the air volume of the fan 34, and the air volume of the fan 34 is related to the rotational speed of the fan 34. In one example, the corresponding relationship between the oil smoke concentration and the fan air volume can be established by simulating the scene of actually using the range hood 100, and the oil smoke concentration can be calibrated by the electric signal output by the light receiving device 54. The corresponding air quantity is achieved through the rotating speed of the fan 34, and the oil smoke absorption effect can be improved.

The oil smoke detection assembly can comprise one or more light receiving devices, the light intensity signal output by each light receiving device can be used as oil smoke concentration, and the plurality of light receiving devices refers to two or more than two. Thus, in the case where the smoke detection assembly includes one light receiving device, the air volume of the fan 34 can be determined based on the detected smoke concentration, and in the case where the smoke detection assembly includes a plurality of light receiving devices, the air volume of the fan 34 can be determined based on the detected smoke concentrations. When the air volume of the fan 34 is determined based on the detected plurality of oil smoke concentrations, the average value of the plurality of oil smoke concentrations may be used as a basis for controlling the oil smoke concentration of the air volume of the fan 34, or the basis for controlling the air volume of the fan 34 may be calculated by distributing the plurality of oil smoke concentrations by weight. The specific manner of controlling the fan air volume according to the oil smoke concentration is not limited herein.

Referring to fig. 9, in the example of fig. 9, the range hood 100 further includes a fixing portion provided at an outer wall of the check valve 40 and spaced apart from each other, and the light emitting device 52 and the light receiving device 54 are mounted at the fixing portion with a space therebetween. Specifically, the fixing portion includes a first fixing portion 521 and a second fixing portion 541 spaced apart, the light emitting device 52 is mounted on the first fixing portion 521, and the light receiving device 54 is mounted on the second fixing portion 541.

In the embodiment shown in fig. 9, the fixing portions are integrated with the check valve 40, i.e., the first fixing portion 521 and the second fixing portion 541 are integrated with the check valve 40. In this way, the manufacture of the fixing portion and the check valve 40 can be made simple.

In another embodiment, the fixing portion and the check valve 40 are separate structures, that is, the first fixing portion 521 and the second fixing portion 541 are separate structures from the check valve 40. Like this, can make oil smoke detection assembly 50 can use on the check valve 40 of different kinds like this, borrow original oil smoke detection assembly 50 and other parts, can reduce check valve 40's transformation cost and raise the efficiency. Specifically, the first and second fixing

portions

521 and 541 may be connected with the check valve 40 by means of screws or a snap or an adhesive.

It should be noted that the first fixing portion 521 and the second fixing portion 541 may be provided as an integral structure or a separate structure according to actual requirements of the range hood 100, and are not particularly limited herein.

In the example of fig. 2 and 9, the range hood 100 includes a wire guard structure 60 provided on an outer wall of the check valve 40, and the smoke detecting assembly 50 includes wires (not shown) connecting the light emitting device 52 and the light receiving device 54, and a part of the wires are received in the wire guard structure 60. Thus, the wire protection structure 60 can protect the wire, and the service life of the oil smoke detection assembly 50 is prolonged.

Specifically, the wire guard structure 60 connects the first fixing portion 521 and the second fixing portion 541, and the wire can be used for power supply and transmission of data, instructions, and the like. The wires include a first wire connected to the light emitting device 52 and a second wire connected to the light receiving device 54. The wire protection structure 60 includes a wire protection cavity 62 and a wire protection cover 61, wherein a part of the first wire and a part of the second wire are accommodated in a wire protection groove formed in the wire protection cavity 62, and the wire protection cover 61 covers the wire protection groove to form a relatively closed space. The two ends of the wire cover 61 can be connected to the first fixing portion 521 and the second fixing portion 541 by means of fastening, screwing, or the like. In addition, a plurality of wires can form a wire bundle, so that the wires are convenient to arrange.

In one embodiment, the first fixing portion 521, the second fixing portion 541 and the wire protection cavity 62 are integrated with the check valve 40.

In another embodiment, the first fixing portion 521, the second fixing portion 541 and the wire protection cavity 62 are separate structures. Specifically, the wire guard structure 60 may be connected to the first fixing portion 521 and the second fixing portion 541 to form an integral part, and the integral part may be connected to the check valve 40 by a screw or a snap or an adhesive.

In an embodiment of the present invention, referring to fig. 9 and 10, fig. 10 is a sectional view of the check valve assembly of fig. 9 taken along the line L-L, and the perspective of the sectional view shown in fig. 10 is a plan sectional view. The light emitting device 52 and the light emitting device 52 each include a sealing plug and a circuit board. Referring to fig. 11 and 12, the sealing plug of the light emitting device 52 is a first sealing plug 562. The sealing plug of the light receiving device 54 is a second sealing plug 564, the circuit board of the light emitting device 52 is a first circuit board 551, and the circuit board of the light receiving device 54 is a second circuit board 552. The first sealing plug 562 is mounted on the first circuit board 551 and the second sealing plug 564 is mounted on the second circuit board 552. The light emitting device 52 further includes a light emitting portion 522, and the first sealing plug 562 is formed with a first inner cavity 5622, and the light emitting portion 522 is located in the first inner cavity 5622 and is disposed on the first circuit board 551. The light receiving device 54 further includes a light receiving portion 542, and the second sealing plug 564 is formed with a second inner cavity 5642, the light receiving portion 542 being located in the second inner cavity 5642 and provided on the second circuit board 552.

The first sealing plug 562 forms a first interior cavity 5622 that is open at one end when mated and compressed with the first circuit board 551. The second bore seal 564 forms a second interior cavity 5642 that is open at one end when mated and pressed against the second circuit board 552. The sealing plug can be made of soft materials such as rubber or silica gel. In one example, the ratio of the depth of the cavity to the pore size is greater than or equal to 6, and the diffusion rate of soot particles 110 into the pores can be controlled to be less than 1%.

Referring to fig. 10, 11 and 12, the check valve 40 is formed with a first through hole 401, and the first sealing plug 562 is partially disposed in the first through hole 401. The check valve 40 defines a second through-hole 402 and a second sealing plug 564 is partially disposed within the second through-hole 402.

Referring to fig. 11, the check valve 40 further includes a first protrusion ring 524 protruding on the inner wall of the first through hole 401. The first protruding ring 524 can block the soot particles 110 from entering the first inner cavity 5622, and the first protruding ring 424 is provided with an emission opening 5282 for light to exit. The check valve 40 includes a second male ring 544 protruding from the inner wall of the second through-hole 402. The second collar 544 is formed with a receiving opening 5482 to facilitate light entering. The second raised ring 544 may act to shield the soot particles 110 from entering the second interior cavity 5642.

The light emitting portion 522 includes an infrared emission tube. The light receiving section 542 includes an infrared receiving tube. The light emitting portion 522 may emit infrared light, and the light receiving portion 542 may receive the infrared light emitted from the light emitting portion 522 and output a corresponding electrical signal according to the received infrared light, and the corresponding electrical signal may be transmitted to the controller of the electronic control board via the second circuit board 552.

In the example of fig. 11, a first shielding portion 510 is provided on an inner wall of the first inner cavity 5622 at a front end of the light emitting portion 522. Specifically, the first shielding portion 510 is formed with a first slinger 506, and the first slinger 506 is annularly projected on the inner wall of the first inner cavity 5622. The number of the first slinger 506 is plural, and the plural first slingers 506 are arranged along the length direction of the first sealing plug. In the example of fig. 13, a second shielding portion 520 is provided on an inner wall of the second inner cavity 5642 at a front end of the light receiving portion 542. Specifically, the second shielding portion 520 is formed with a second oil slinger 508, and the second oil slinger 508 is annularly provided convexly on the inner wall of the second inner cavity 5642. The number of the second oil slinger 508 is plural, and plural second oil slingers 508 are arranged along the length direction of the second sealing plug.

When the soot particles enter the first inner cavity 5622 due to air fluctuation, the soot particles 110 are blocked by the first blocking portion 510 adsorbed on the first inner cavity 5622, so that the pollution to the light emitting portion 522 is reduced. With respect to the first oil slinger 506, the groove of the first oil slinger 506 absorbs the air fluctuation, and the soot particles 110 are further intercepted by the first oil slinger 506, therefore, the first oil slinger 506 can further improve the shielding effect on the soot particles 110, and further prevent the soot particles 110 from polluting the light emitting portion 522 and affecting the service life of the light emitting portion 522.

When the soot particles 110 enter the second inner cavity 5642 due to air fluctuation, the soot particles 110 are shielded by the second shielding portion 520 adsorbed on the second inner cavity 5642 to reduce the pollution to the light receiving portion 542. With respect to the second oil control ring 508, the grooves of the second oil control ring 508 absorb the air fluctuation, and the soot particles 110 are further intercepted by the second oil control ring 508, so that the second oil control ring 508 can further improve the shielding effect on the soot particles 110, and further prevent the soot particles from contaminating the light receiving portion 542, which affects the service life of the light receiving portion 542.

It should be noted that, in other embodiments, the first blocking portion 510 may include other blocking structures, such as protrusions, ribs, recesses, etc. on the inner wall of the first inner cavity 5622, that is, the first blocking portion 510 is disposed to increase the inner wall area of the first inner cavity 5622, so as to increase the probability of the soot particles being attached. The second shielding portion 520 can include other shielding structures, such as protrusions, ribs, recesses, etc. on the inner wall of the second inner cavity 5642, that is, the second shielding portion 520 can increase the inner wall area of the second inner cavity 5642, thereby increasing the probability of the soot particles being attached.

In the example of fig. 11, 12, and 14, a first oil guide groove 507 is opened in an inner wall of the first inner cavity 5622, and the first oil guide groove 507 is connected to the first shielding portion 510. When the soot particles 110 enter the first inner cavity 5622 due to air fluctuation, the soot particles 110 are adsorbed on the inner wall of the first inner cavity 5622 to form condensate, and the condensate can flow out through the first oil guiding groove 507 at the bottom of the first sealing plug 562. The first oil guiding groove 507 is a long hole with a circular or square cross section, and preferably, the opening of the first oil guiding groove 507 is lower than the inside of the first inner cavity 5622, that is, the first oil guiding groove 507 is inclined downwards in a direction away from the light emitting portion 522, so as to facilitate the liquid to flow out. The first oil guiding groove 507 may also be opened in parallel with the first inner cavity 5622 to allow the liquid to flow out. The side length or diameter of the first oil guiding groove 507 is greater than or equal to 2.5mm (preferably, greater than or equal to 3mm) to overcome the internal tension of the liquid and facilitate the liquid flowing out.

In one example, the first sealing plug 562 is cylindrical, the outer diameter of the first sealing plug 562 is 20-25 mm, the inner diameter of the first sealing plug 562 is 5-10 mm, the depth of the first oil deflector ring 506 is 5-10 mm, the depth of the first oil guide groove 507 is 3-5 mm, the first oil deflector ring 506 is annular, the number of the first oil deflector rings 506 is multiple, the multiple first oil deflector rings 506 are sequentially arranged along the length direction of the first sealing plug 562, and the depth of each first oil deflector ring 506 is the same. It should be noted that the values and value ranges mentioned in the above examples and embodiments are for the purpose of illustrating the implementation of the present invention, and should not be construed as limiting the present invention, and the values and value ranges can be adjusted according to actual design parameters. The numerical values and numerical ranges set forth elsewhere herein are to be understood in light of the teachings herein. In other examples, the first sealing plug 562 may have a regular or irregular nominal shape such as a rectangular parallelepiped, a square cube, etc., and is not limited herein.

In the example of fig. 12, the first and

second collars

524 and 544 are each opened with a drain hole 529, the drain hole 529 is communicated with the corresponding oil guide groove, and the dirt flowing into the oil guide groove can be discharged from the drain hole 529 to the first and second sealing plugs 562 and 564.

In the example of fig. 12, the inner wall of the second inner cavity 5642 is opened with a second oil guide groove 509. The second oil guide groove 509 is connected to the second shielding portion 520. When the soot particles 110 enter the second inner cavity 5642 due to air fluctuation, the soot particles 110 are adsorbed on the inner wall of the second inner cavity 5642 to form condensate, and the condensate can flow out through the second oil guiding groove 509 at the bottom of the second sealing plug 564. The second oil guide groove 509 is an elongated hole having a circular or square cross section, and preferably, the opening of the second oil guide groove 509 is lower than the inside of the second inner cavity 5642, that is, the second oil guide groove 509 is inclined downward in a direction away from the light receiving portion 542, so that the liquid can flow out. The second oil guiding groove 509 is also opened in parallel with the second inner cavity 5642 to allow the liquid to flow out. The length or diameter of the second oil guiding groove 509 is greater than or equal to 2.5mm (preferably, greater than or equal to 3mm) to overcome the internal tension of the liquid and facilitate the liquid flowing out.

Referring to fig. 13, in the example of fig. 13, the central axis of the light emitting device 52 and the central axis of the light receiving device 54 are located on the same straight line T and intersect the central axis of the check valve 40 in the vertical direction (this central axis is perpendicular to the paper surface). Thus, the installation of the oil smoke detecting assembly 50 is realized. The center axis of the first inner cavity 5622, the center axis of the second inner cavity 5642, and the center axis of the light emitting device 52 and the light receiving device 54 coincide and are all located on the same straight line T. In other embodiments, the central axis of the light emitting device 52 and the central axis of the light receiving device 54 are located on different straight lines, and the central axis of the check valve 40 in the vertical direction (which central axis is perpendicular to the plane of the paper) intersects, the central axis of the light emitting device 52 and the central axis of the light receiving device 54 forming an included angle in the range of (0,180) degrees, which may be 30 degrees, 40 degrees, or 120 degrees, for example.

Further, one end of the first sealing plug 562 is opened with a transmitting opening 5282, the second sealing plug 564 is opened with a receiving opening 5482, and the diameter of the receiving opening 5482 is larger than that of the transmitting opening 5282. Thus, the light receiving area of the light receiving device 54 can be increased.

In the example of fig. 13, the central axis of the light emitting device 52 and the central axis of the light receiving device 54 are located on the same straight line T on the plane perpendicular to the central axis of the check valve, and the light emitting device 52 and the light receiving device 54 are respectively disposed on the left and right sides of the check valve 40. The central axis of the check valve 40 in the vertical direction of fig. 13 is perpendicular to the paper surface.

In another embodiment, the central axis of the light emitting device 52 and the central axis of the light receiving device 54 are located on the same line that is obliquely disposed with respect to a plane perpendicular to the central axis of the check valve 40. For example, the central axis of the light emitting device 52 and the central axis of the light receiving device 54 are located on the same straight line inclined by 10 degrees, 20 degrees, or 30 degrees with respect to the plane perpendicular to the central axis of the check valve 40, and the inclined angle is not limited herein.

The light receiving device 54 and the light emitting device 52 shown in fig. 13 are disposed on the left and right sides of the check valve 40, respectively, and may be horizontally rotated by any angle in the illustrated installation position, such as disposed on the front and rear sides of the check valve 40 or in other orientations. The light emitting device 52 can emit light (e.g., infrared light), which passes through the soot air channel region of the check valve 40 and is received by the opposite light receiving device 54, and when there is no particulate matter in the air channel region, the detected light intensity of the light receiving device 54 is substantially unchanged, i.e., the value (e.g., voltage value) of the output electrical signal is substantially unchanged.

The soot particles pass through the volute 32 to the soot duct of the check valve 40 by centrifugal force of the impeller. The soot particles 110 pass through the light path to cause light shielding, scattering and diffraction, wherein the light shielding of particles with large particle size has a large influence on the intensity of light, causing the intensity of light received by the light receiving device 54 to be reduced. When the amount of soot decreases, the shielding effect is reduced, and the intensity of light received by the light receiving device 54 increases. The light intensity can be represented by the value of the electrical signal, for example, the light receiving device 54 receives the light and outputs the electrical signal, the electrical signal is analog-to-digital converted to obtain a digital signal, and the digital signal can be used to obtain a corresponding value, such as a voltage value.

In the example of fig. 14, the first sealing plug 562 also includes a locating pin 561. The sealing plug 56 can be accurately mounted on the first fixing portion 521 by the positioning action of the positioning pin 561. The planar shape of the positioning pin 561 is rectangular, circular, triangular, etc., and is not limited herein. In the example of fig. 14, the planar shape of the positioning pin 561 is rectangular. The second sealing plug 564 is of similar construction to the first sealing plug 562.

Referring to fig. 15, a range hood 100 according to another embodiment of the present invention is shown. The range hood 100 may include a baffle assembly 10, a box 20, a check valve 40 and an organic molecule sensor 200, the box 20 is disposed on the baffle assembly 10, a blower assembly 30 is disposed in the box 20, the check valve 40 is connected to the top of the box 20, the check valve 40 is connected to the smoke tube 24, the blower assembly 30 includes a volute 32 and a blower 34 disposed in the volute 32, the baffle assembly 10 is provided with a smoke collecting cavity (not shown), and the organic molecule sensor 200 is mounted on at least one of the smoke collecting cavity, the volute 32, the check valve 40 and the smoke tube 24. The organic matter molecule sensor 200 is used for detecting the organic matter molecule concentration of at least one inner lampblack air channel of the smoke collecting cavity, the volute 32, the check valve 40 and the smoke pipe 24, and the range hood 100 is used for controlling the operation of the fan 34 according to the organic matter molecule concentration.

The range hood 100 of the present embodiment is suitable for being installed on a range of a home kitchen, and is also suitable for a large kitchen of a restaurant. In one example, when a user performs cooking on a kitchen range, oil smoke is generated during the cooking process, the oil smoke contains a large amount of organic molecules and oil smoke particles, and generally, the concentration of the organic molecules is in direct proportion to the concentration of the oil smoke, so that the concentration of the oil smoke can be determined by detecting the concentration of the organic molecules. The organic molecule sensor 200 installed on the range hood 100 can detect the concentration of organic molecules contained in the oil smoke, know the concentration of oil smoke particles in the current kitchen, and adjust the rotating speed of the fan 34 of the fan assembly 30 according to the concentration of organic molecules contained in the current oil smoke to adjust the air volume of the fan. The system not only can effectively purify the oil smoke concentration in a kitchen in real time and protect the health of human bodies, but also can properly reduce the power of the fan assembly 30 and save energy when the oil smoke concentration is relatively low.

Specifically, the organic molecule sensor 200 may employ a Volatile Organic Compounds (VOC) sensor. In the embodiment shown in fig. 15, the organic molecule sensor 200 is installed in the smoke collecting chamber, the volute 32, the check valve 40 and the smoke tube 24, so that the organic molecule sensor can detect the organic molecule concentration in the smoke collecting chamber, the volute 32, the check valve 40 and the smoke tube 24, and can average the organic molecule concentration data collected from the 4 organic molecule sensors 200, and the average value is used as the basis for controlling the operation of the fan 34. It is understood that in other embodiments, the data collected by the 4 organic molecule sensors 200 may be weighted differently to calculate the data that will ultimately be relied upon to control the operation of the fan 34. In further embodiments, the organic molecule sensor 200 may be mounted on one or two or three of the smoke-holding chamber, the volute 32, the check valve 40, and the smoke tube 24.

The range hood 100 can be preset with a corresponding relation between the oil smoke concentration and the air volume of the fan, and the corresponding relation can be set by simulating an actual use scene of the range hood 100. The corresponding relationship between the oil smoke concentration and the resistance value output by the organic molecule sensor 200 or the corresponding relationship between the oil smoke concentration and the light intensity signal output by the light receiving device 54 can also be calibrated and stored in the simulation process.

In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

In the description of the present specification, reference to the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example" or "some examples" or the like means that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.

The logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processing module-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection having one or more wires (control method), a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It should be understood that portions of embodiments of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.

It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware that is related to instructions of a program, and the program may be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a separate product, may also be stored in a computer readable storage medium.

The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A control method of a range hood is characterized in that the range hood comprises a fan, and the control method comprises the following steps:

controlling the fan to operate in a first state and recording a first corresponding relation between the air volume of the fan at each gear and a first current, wherein the first state is a fully-opened state of an air outlet of the range hood;

controlling the fan to operate in a second state and recording a second corresponding relation between the maximum wind pressure and a second current of the fan at each gear, wherein the second state is a full-blocking state of an air outlet of the range hood;

2. The control method according to claim 1, wherein the controlling the fan to operate in the first state and recording the first corresponding relationship between the air volume and the current of the fan in each gear comprises:

3. The control method according to claim 2, wherein the controlling the fan to operate in the second state and recording the second corresponding relationship between the current and the wind pressure of the fan in each gear comprises:

controlling the fan to operate at each set gear in the second state;

4. The control method according to claim 3, wherein the controlling the operation of the fan according to the input fan gear information, the first correspondence and the second correspondence includes:

5. The control method according to claim 4, wherein the controlling the operation of the fan according to the input fan gear information, the first correspondence and the second correspondence includes:

detecting the variation trend of the rotating speed of the fan;

6. The utility model provides a range hood, its characterized in that includes treater and fan, the treater is connected the fan, the treater is used for:

7. A range hood as claimed in claim 6, wherein the processor is configured to:

8. A range hood as claimed in claim 7, wherein the processor is configured to:

controlling the fan to operate at each set gear in the second state;

9. A range hood as claimed in claim 8, wherein the processor is configured to:

10. A range hood as claimed in claim 9, wherein the processor is configured to:

detecting the variation trend of the rotating speed of the fan;

11. A non-transitory computer-readable storage medium containing computer-executable instructions that, when executed by one or more processors, cause the processors to perform the control method of any one of claims 1-5.