Central range hood and purification function control method and device thereof

Abstract

The present invention provides a central range hood and a method and device for controlling its purification function, and relates to the technical field of central range hoods. The method includes: obtaining the concentration of oil fume odor; determining the purification mode of the central range hood based on the concentration of oil fume odor; calculating the target purification parameters of the central range hood corresponding to the purification mode; and adjusting the fan of the central range hood according to the target purification parameters. The central range hood and a method and device for controlling its purification function provided by the present invention can realize the scientific and reasonable use of the purification function of the central range hood, and the process of adjusting the fan according to the target purification parameters can further adjust the air resistance caused by the purification function while ensuring the purification effect of the central range hood, reduce unnecessary purification wind resistance, and can not only reduce power demand, but also achieve the purpose of high efficiency and energy saving.

Description

Technical Field

[0001] The present invention relates to the technical field of central range hoods, and in particular to a central range hood and a purification function control method and device thereof. Background Art

[0002] A central range hood usually consists of a main unit and multiple terminals. The main unit is generally installed at the exit of the exhaust duct on the roof or on the roof of a unit building. The range hood in each household is the terminal. When the main unit detects that the terminal is turned on, it can forcefully extract the oil smoke in the exhaust duct, thereby forming a negative pressure in the exhaust duct. The oil smoke is sucked out of the exhaust duct and then centrally purified by the main unit on the roof, and finally discharged harmlessly into the atmosphere.

[0003] Usually, depending on the partial adsorption through the public flue and the number of users, the concentration of oil fumes discharged from the exhaust duct does not remain the same all the time. However, the maximum purification efficiency of the central range hood is designed for high oil fume concentrations to ensure that the purification requirements can be met under harsh conditions. This will inevitably lead to the central range hood's purification performance being somewhat overkill under low oil fume concentrations, and the wind resistance will also increase, resulting in more power being needed to meet normal exhaust needs. The overall energy consumption is too high, resulting in a waste of resources. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a central range hood and a method and device for controlling its purification function to alleviate the above-mentioned technical problems.

[0005] In a first aspect, an embodiment of the present invention provides a method for controlling the purification function of a central range hood, the method comprising: obtaining the concentration of oil fume odor, wherein the oil fume odor concentration is the concentration data of the oil fume odor in a common flue collected before the oil fume exhaust gas enters the central range hood; determining a purification mode of the central range hood based on the oil fume odor concentration; calculating target purification parameters of the central range hood corresponding to the purification mode; and adjusting the fan of the central range hood according to the target purification parameters to control the purification function of the central range hood.

[0006] Preferably, in a possible implementation, the above-mentioned step of determining the purification mode of the central range hood based on the oil fume odor concentration includes: obtaining a correspondence between a pre-configured concentration threshold and a purification mode; wherein the correspondence between the concentration threshold and the purification mode is used to characterize purification modes corresponding to different concentration thresholds, and the higher the concentration threshold, the stronger the purification ability of the corresponding purification mode; and determining the purification mode of the central range hood according to the oil fume odor concentration and the correspondence between the concentration threshold and the purification mode.

[0007] Preferably, in a possible implementation manner, the step of determining the purification mode of the central range hood according to the oil fume odor concentration and the correspondence between the concentration threshold and the purification mode includes: if the oil fume odor concentration is less than a preset first concentration threshold, determining the purification mode of the central range hood to be the first purification mode, wherein the first purification mode is a mode of purifying oil fume exhaust gas using an electrostatic adsorption function; if the oil fume odor concentration is greater than or equal to the first concentration threshold, and less than a preset second concentration threshold, determining the purification mode of the central range hood to be the second purification mode, wherein the second purification mode is a mode of purifying oil fume exhaust gas using the electrostatic adsorption function and the filtering function; if the oil fume odor concentration is greater than or equal to the second concentration threshold, determining the purification mode of the central range hood to be the third purification mode, wherein the third purification mode is a mode of purifying oil fume exhaust gas using the electrostatic adsorption function, the filtering function and the decomposition function, and the decomposition function also includes a catalytic decomposition function and / or an adsorption decomposition function, wherein the first concentration threshold is less than the second concentration threshold.

[0008] Preferably, in a possible implementation manner, the step of calculating the target purification parameters of the central range hood corresponding to the purification mode includes: determining the resistance coefficient of the central range hood according to the purification mode; calculating the target fan frequency of the central range hood based on the resistance coefficient, and determining the target fan frequency as the target purification parameter of the central range hood.

[0009] Preferably, in a possible implementation manner, the above-mentioned central range hood is configured with a primary filter screen, an electrostatic purification unit, a photocatalytic unit, and an adsorption filter screen arranged in sequence along the air flow direction; wherein, the primary filter screen is used to achieve the primary gas filtration function of the central range hood; the electrostatic purification unit is used to achieve the electrostatic adsorption function of the central range hood; the photocatalytic unit is used to achieve the catalytic decomposition function of the central range hood; the adsorption filter screen is used to achieve the adsorption and decomposition function of the central range hood; and, the primary filter screen and the adsorption filter screen are arranged in the purification channel of the central range hood through an opening and closing structure; the above method further includes: if it is determined that the purification mode of the central range hood is the first purification mode, then adjust the included angle between the axial directions of the primary filter screen and the adsorption filter screen and the axial direction of the flue through the opening and closing structure, so that the primary filter screen and the adsorption filter screen are in a retracted state; if it is determined that the purification mode of the central range hood is the second purification mode, then adjust the included angle between the axial directions of the primary filter screen and the adsorption filter screen and the axial direction of the flue through the opening and closing structure, so that the primary filter screen is in a working state, and, the adsorption filter screen is in a retracted state; if it is determined that the purification mode of the central range hood is the third purification mode, then adjust the included angle between the axial directions of the primary filter screen and the adsorption filter screen and the axial direction of the flue through the opening and closing structure, so that both the primary filter screen and the adsorption filter screen are in a working state.

[0010] Preferably, in a possible implementation manner, the above step of determining the resistance coefficient of the central range hood according to the purification mode includes: if the purification mode is the first purification mode, then determine that the resistance coefficient of the central range hood is α = θ2 + θ3, where α is the resistance coefficient, θ2 is the resistance coefficient of the electrostatic purification unit, and θ3 is the resistance coefficient of the photocatalytic unit; if the purification mode is the second purification mode, then determine that the resistance coefficient of the central range hood is α = θ1 + θ2 + θ3, where θ1 is the resistance coefficient of the primary filter screen; if the purification mode is the third purification mode, then determine that the resistance coefficient of the central range hood is α = θ1 + θ2 + θ3 + θ4, where θ4 is the resistance coefficient of the adsorption filter screen.

[0011] Preferably, in a possible implementation manner, the above step of calculating the target fan frequency of the central range hood based on the resistance coefficient includes: calculating the target fan frequency of the central range hood according to the following formula: F = α * F递 * k + F初; where F is the target fan frequency, F初 is the preset initial frequency, F递 is the preset frequency increase value, and k is the number of turned-on terminal components in the common flue.

[0012] In a second aspect, an embodiment of the present invention further provides a purification function control device for a central range hood, the device comprising: an acquisition module for acquiring the oil fume odor concentration, wherein the oil fume odor concentration is the concentration data of the oil fume odor in the common flue collected before the oil fume exhaust gas enters the central range hood; a determination module for determining the purification mode of the central range hood based on the oil fume odor concentration; a calculation module for calculating the target purification parameters of the central range hood corresponding to the purification mode; and an adjustment module for adjusting the fan of the central range hood according to the target purification parameters to control the purification function of the central range hood.

[0013] In the third aspect, an embodiment of the present invention further provides a central range hood, comprising a controller, and a host and a terminal component connected to the controller; wherein the controller is provided with the purification function control device of the central range hood described in the second aspect; the host is installed at the outlet of the common flue, and is used to assist in exhausting the oil fume waste gas inside the common flue; the terminal component communicates with the host, and is used to control multiple kitchen exhaust functions that exhaust smoke through the common flue; wherein the host comprises an oil fume odor detection unit, a purification channel, a fan, a muffler and a hood arranged in sequence along the airflow direction, and the purification channel is provided with at least one purification unit for purifying the oil fume waste gas entering the host.

[0014] Preferably, in a possible embodiment, the at least one purification unit includes a primary filter, an electrostatic purification unit, a photocatalytic unit and an adsorption filter arranged in sequence along the air flow direction; wherein the primary filter and the adsorption filter are arranged in the purification channel of the central range hood through an opening and closing structure.

[0015] In a fourth aspect, an embodiment of the present invention provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method described in the first aspect when executing the computer program.

[0016] In a fifth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method described in the first aspect are executed.

[0017] The embodiments of the present invention bring the following beneficial effects:

[0018] The central range hood and its purification function control method and device provided in the embodiment of the present invention can obtain the oil fume odor concentration and determine the purification mode of the central range hood based on the oil fume odor concentration; then calculate the target purification parameters of the central range hood corresponding to the purification mode, and then adjust the fan of the central range hood according to the target purification parameters to control the purification function of the central range hood. The above-mentioned method of determining the purification mode based on the oil fume odor concentration can realize the scientific and reasonable use of the purification function of the central range hood, and the process of adjusting the fan according to the target purification parameters can further adjust the air resistance caused by the purification function while ensuring the purification effect of the central range hood, thereby reducing unnecessary purification wind resistance, which can not only reduce power requirements but also achieve the purpose of high efficiency and energy saving.

[0019] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A schematic diagram of the structure of a purification treatment device provided by an embodiment of the present invention;

[0023] Figure 2 A flow chart of a method for controlling the purification function of a central range hood provided by an embodiment of the present invention;

[0024] Figure 3 A schematic structural diagram of a filter unit provided in an embodiment of the present invention;

[0025] Figure 4 A schematic structural diagram of another purification treatment device provided by an embodiment of the present invention;

[0026] Figure 5 A schematic diagram of the structure of a purification function control device for a central range hood provided by an embodiment of the present invention;

[0027] Figure 6 A working process of a central range hood provided in an embodiment of the present invention.

[0028] Figure numerals: 10 - purification channel; 101 - filter unit; 102 - fan; 401 - primary filter; 402 - electrostatic purification unit; 403 - photocatalytic unit; 404 - adsorption filter; 405 - oil fume odor detection unit; 406 - wind hood; 407 - silencer. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0030] At present, the maximum purification efficiency of central range hoods is designed for high oil fume concentrations to ensure that the product can meet the purification requirements under harsh conditions. This will inevitably lead to a certain overkill of purification performance under low oil fume concentrations, and the overall energy consumption is also high. Based on this, the embodiments of the present invention provide a central range hood and a purification function control method and device thereof, which can alleviate the above technical problems.

[0031] To facilitate understanding of this embodiment, a method for controlling the purification function of a central range hood disclosed in an embodiment of the present invention is first introduced in detail.

[0032] In a possible implementation manner, an embodiment of the present invention provides a method for controlling a purification function of a central range hood. Specifically, the method is applied to a controller of a central range hood.

[0033] Usually, a central range hood includes a host and a terminal component, both of which usually communicate with a controller. The host is installed at the exit of a public flue in a residence or roof, etc., and assists in exhausting the oil smoke inside the public flue. It also contains equipment such as a fan. The terminal component communicates with the host through wired or wireless means, and is set at the exhaust position of each household or family, such as the kitchen, etc., to replace the range hood. However, one of the biggest differences between the terminal and the range hood is that there is no motor (fan), and the noise is greatly reduced when in use. The terminal component is also usually called a terminal. In order to achieve communication with the host and the controller, an intelligent control system is usually embedded inside it.

[0034] Since the terminal component has no motor, when the resident needs to open the terminal component for smoke exhaust, the terminal component can respond to the resident's operation through the internal intelligent control system and send a terminal component start signal to the controller, so that the controller controls the host to turn on the smoke exhaust function and purification function. Therefore, the above-mentioned host and controller usually constitute a purification treatment device of the central range hood.

[0035] For ease of understanding, Figure 1 The schematic diagram of the structure of a purification treatment device is shown. The purification treatment device is arranged on the main unit of a central range hood, and the main unit is installed at the outlet of a public flue to assist in exhausting the oil fume waste gas inside the public flue.

[0036] Specifically, Figure 1 As shown, the purification treatment device includes a purification channel 10, and at least one filter unit 101 and a fan 102 arranged in the purification channel and arranged in sequence along the airflow direction. Figure 1 Only two filter units 101 are shown for exemplary illustration, and the direction indicated by the arrow is the airflow direction. In other embodiments, the number of the above-mentioned filter units and the type of adsorption can be set according to actual usage, and the embodiment of the present invention does not limit this.

[0037] Furthermore, the filter unit is opened and closed by a structure ( Figure 1 (not shown) is arranged in the purification channel; wherein, the opening and closing structure is used to adjust the relative position of the filter unit in the purification channel to adjust the presentation state of the filter unit; wherein, the presentation state includes a working state or a retracted state, and the working state is configured as a state when the filter unit filters the oil fume exhaust gas, and the retracted state refers to a state in which the filter does not work.

[0038] In actual use, the above-mentioned opening and closing mechanism may include a driver and a driving shaft connected to the driver; the driver is connected to the controller of the central range hood; the filter unit includes a filter structure, and the filter structure is hinged to the inner wall of the purification channel through the driving shaft.

[0039] Furthermore, the main unit of the above-mentioned central range hood may also be provided with an oil fume odor detection unit. Specifically, the oil fume odor detection unit is a device for detecting the concentration of oil fume gas, which may be an oil fume sensor, etc., for detecting the concentration data of the oil fume odor in the public flue before the oil fume exhaust gas enters the central range hood.

[0040] The controller drives the driver of the above-mentioned opening and closing mechanism to rotate according to the concentration data, and then drives the above-mentioned driving shaft to rotate, driving the filter structure to adjust the presentation state of the filter unit. For example, the filter structure is controlled to be folded up or lowered, and the folding or lowering of the filter structure is usually reflected in the size of the wind resistance generated when the central range hood exhausts smoke. When the filter structure is folded up, no wind resistance will be generated, or the wind resistance is very small, and the lowering of the filter structure corresponds to the working state of the filter unit. At this time, the filter unit has a filtering effect on the oil fume exhaust gas, so it will generate a certain amount of wind resistance. When the controller adjusts the presentation state of the filter unit through the opening and closing structure, the wind resistance generated by the filter unit will also change accordingly. At this time, the controller can simultaneously adjust the parameters of the fan of the main unit in the central range hood, and adjust the fan to control the purification function of the central range hood.

[0041] Therefore, based on Figure 1 The purification treatment device shown in the figure, the embodiment of the present invention also provides a purification function control method of a central range hood, and describes the purification function control process of the central range hood. Specifically, Figure 2 A flow chart of a method for controlling the purification function of a central range hood is shown. Figure 2 As shown, the method comprises the following steps:

[0042] Step S202, obtaining the concentration of oil fume odor;

[0043] Among them, the oil fume odor concentration is the concentration data of the oil fume odor in the public flue collected before the oil fume exhaust gas enters the central range hood; for example, an oil fume odor detection unit is set at the entrance of the purification channel, which can detect the concentration data of the oil fume odor in the public flue before the oil fume exhaust gas enters the central range hood, and the concentration data is generated by the controller of the central range hood. After monitoring that the terminal component is started, the controller can obtain the concentration data of the oil fume odor through the above step S202, and then continue to execute the following steps to control the purification function of the central range hood after the terminal component is started.

[0044] Step S204, determining the purification mode of the central range hood based on the oil fume odor concentration;

[0045] Usually, different purification modes correspond to different purification capabilities of central range hoods for oil fume exhaust gas. As people pay more attention to air pollution, residential oil fume exhaust gas has gradually become the target of treatment. For the treatment of residential oil fume exhaust gas, the general practice is to learn from the means of restaurant oil fume treatment, such as: electrostatic purifier, various filters, activated carbon adsorption, photodesorption, etc.

[0046] In order to achieve the purification effect, multiple purification methods are often used to work simultaneously to solve the purification problem. The usual practice in the catering industry is to customize the purification method according to the purification needs. Usually, the module with purification function is fixed and cannot be moved in the public flue, that is, the purification mode is single and needs to be replaced / maintained regularly. Figure 1 It can be seen that, since the filter unit of the central range hood in the embodiment of the present invention is arranged in the purification channel through an opening and closing structure, the purification mode in the embodiment of the present invention can be set in a variety of ways according to actual needs, such as the working state or the retracted state of the filter unit can correspond to different purification modes. The process of step S204 is the process of determining the purification mode based on the concentration of the oil fume odor.

[0047] Step S206, calculating the target purification parameters of the central range hood corresponding to the purification mode;

[0048] Step S208, adjusting the fan of the central range hood according to the target purification parameter to control the purification function of the central range hood.

[0049] As can be seen from the above, different purification modes refer to different purification capabilities of the central range hood, and therefore the wind resistance generated by the filter unit in different purification modes is also different. For example, when the filter unit is in the retracted state, it will not purify the oil fume exhaust gas, nor will it generate wind resistance, or the wind resistance is very small. However, the filter unit in the working state needs to filter the oil fume exhaust gas, so the oil fume exhaust gas needs to pass through the filter unit in the exhaust state. At this time, the purification capacity of the central range hood is stronger, and the wind resistance it generates is also greater. Therefore, in order to ensure that negative pressure is formed in the purification channel, and then the purified oil fume exhaust gas is discharged from the public flue, usually, a higher frequency fan is required when the wind resistance is large, and when the wind resistance is small, in order to avoid excessive overall energy consumption and waste of resources, the frequency of the fan can be reduced. The processes of step S206 and step S208 can calculate the target purification parameters corresponding to the current purification mode of the central range hood, and adjust the fan of the central range hood according to the target purification parameters to control the purification function of the central range hood, thereby realizing adaptive adjustment of the central range hood.

[0050] Therefore, the purification function control method of the central range hood provided in the embodiment of the present invention can obtain the oil fume odor concentration and determine the purification mode of the central range hood based on the oil fume odor concentration; then calculate the target purification parameters of the central range hood corresponding to the purification mode, and then adjust the fan of the central range hood according to the target purification parameters to control the purification function of the central range hood. The above-mentioned method of determining the purification mode based on the oil fume odor concentration can realize the scientific and reasonable use of the purification function of the central range hood. The process of adjusting the fan according to the target purification parameters can further adjust the air resistance brought by the purification function while ensuring the purification effect of the central range hood, thereby reducing unnecessary purification wind resistance, which can not only reduce power requirements but also achieve the purpose of high efficiency and energy saving.

[0051] In actual use, the at least one filter unit may include a primary filter and an adsorption filter; the primary filter and the adsorption filter are respectively arranged in the purification channel through their respective opening and closing structures; wherein the primary filter is used to realize the primary filtering function of the oil fume exhaust gas; the adsorption filter is used to realize the adsorption and decomposition function of the oil fume exhaust gas. Specifically, the primary filter includes an oil fume filter, and the adsorption filter includes an activated carbon adsorption filter, so as to meet the purification capacity of the central range hood for the oil fume exhaust gas.

[0052] Furthermore, the at least one filter unit is usually arranged in sequence in the purification channel. For ease of understanding, Figure 3 A schematic diagram of the structure of a filter unit is shown. Figure 3 As shown, for the sake of convenience Figure 3 Only one embodiment of the filter unit is shown, and Figure 3 Schematic diagrams showing different presentation states of the filter unit are shown in FIG.

[0053] in, Figure 3 (a) in FIG. 1 shows the working state of the filter unit. Specifically, Figure 3 The direction indicated by the arrow is the airflow direction. Figure 3 In the working state shown in (a), the oil fume exhaust gas needs to pass through the filter unit to realize the adsorption and purification effect of the filter unit on the oil fume exhaust gas. At this time, the filter unit will produce a certain wind resistance. Figure 3 (b) and (c) in FIG. 5 correspond to the situation where the opening and closing structure adjusts the relative position of the filter unit in the purification channel, and, Figure 3 (c) refers to the position where the filter structure included in the filter unit is retracted to the direction corresponding to the inner wall of the purification channel.

[0054] further, Figure 3The different presentation states of the filter unit shown in the figure correspond to different purification modes of the central range hood, and different purification modes also correspond to different oil fume odor concentrations. Generally, the higher the oil fume odor concentration, the stronger the purification ability of the corresponding purification mode. For example, when fewer residents start the terminal components, the corresponding oil fume odor concentration is low. At this time, there is no need for the central range hood to start the fan with a higher frequency. In addition, a simple purification method can be used to complete the purification process of the oil fume exhaust gas. At this time, it can be folded. Figure 3 When the number of terminal components started is large and the concentration of oil fume odor is high, a fan with a larger frequency is required to achieve the exhaust function. At this time, the wind force of the fan is large. In order to achieve the purification capacity of oil fume exhaust gas, the filter unit needs to be in working state. Therefore, the opening and closing mechanism can adjust the retracted filter unit to the working state under the drive of the central range hood controller, that is, the corresponding Figure 3 The situation shown in (a) in .

[0055] To achieve Figure 3 The filter unit is automatically adjusted through the opening and closing mechanism. The controller of the central range hood usually pre-stores the corresponding relationship between the concentration threshold of the oil fume odor concentration and the purification mode, so that the controller can determine the purification mode of the central range hood after obtaining the oil fume odor concentration collected by the oil fume odor detection unit, and then adjust the filter unit. Therefore, in the above step S204, determining the purification mode of the central range hood further includes the following process:

[0056] (1) Obtaining the correspondence between the pre-configured concentration threshold and the purification mode;

[0057] The corresponding relationship between the concentration threshold and the purification mode is used to characterize the purification modes corresponding to different concentration thresholds, and the higher the concentration threshold, the stronger the purification ability of the corresponding purification mode;

[0058] (2) Determine the purification mode of the central range hood based on the correspondence between the oil fume odor concentration and the concentration threshold and the purification mode.

[0059] Specifically, when determining the purification mode, if the oil fume odor concentration is less than a preset first concentration threshold, the purification mode of the central range hood is determined to be the first purification mode, wherein the first purification mode is a mode for purifying oil fume exhaust gas using an electrostatic adsorption function;

[0060] Among them, in addition to the above-mentioned primary filter and adsorption filter, the purification treatment device of the central range hood usually also includes an electrostatic purification unit and a photocatalytic unit arranged in the purification channel; and, along the airflow direction, the primary filter, the electrostatic purification unit, the photocatalytic unit, the adsorption filter and the fan are arranged in sequence. Specifically, the primary filter is used to realize the primary filtration function of the gas of the central range hood; the electrostatic purification unit is used to realize the electrostatic adsorption function of the central range hood; the photocatalytic unit is used to realize the catalytic decomposition function of the central range hood; the adsorption filter is used to realize the adsorption decomposition function of the central range hood; and the primary filter and the adsorption filter are arranged in the purification channel of the central range hood through an opening and closing structure.

[0061] The above-mentioned first purification mode corresponds to an implementation mode in which the primary filter and the adsorption filter are in a retracted state through the opening and closing structure, and the photocatalytic unit is turned off. At this time, only the electrostatic purification unit works to ensure the electrostatic adsorption function of the central range hood.

[0062] Therefore, the above method also includes if it is determined that the purification mode of the central range hood is the first purification mode, then adjusting the angle between the axial direction of the primary filter and the adsorption filter and the axial direction of the flue through the opening and closing structure so that the primary filter and the adsorption filter are in a retracted state.

[0063] Further, if the oil fume odor concentration is greater than or equal to the first concentration threshold and less than a preset second concentration threshold, the purification mode of the central range hood is determined to be the second purification mode, wherein the second purification mode is a mode that uses electrostatic adsorption function and filtering function to purify oil fume exhaust gas.

[0064] Among them, the above-mentioned second purification mode corresponds to an implementation method in which the primary filter is in a working state, the electrostatic purification unit is working, the photocatalytic unit is turned off, and the adsorption filter is in a retracted state through the opening and closing structure. Therefore, the above-mentioned method also includes: if it is determined that the purification mode of the central range hood is the second purification mode, the angle between the axial direction of the primary filter and the adsorption filter and the axial direction of the flue is adjusted through the opening and closing structure, so that the primary filter is in a working state, and the adsorption filter is in a retracted state.

[0065] Further, if the oil fume odor concentration is greater than or equal to the second concentration threshold, the purification mode of the central range hood is determined to be the third purification mode, wherein the third purification mode is a mode of purifying oil fume exhaust gas using electrostatic adsorption function, filtering function and decomposition function, and the decomposition function also includes catalytic decomposition function and / or adsorption decomposition function, wherein the first concentration threshold is less than the second concentration threshold.

[0066] Specifically, the third mode corresponds to the state in which the primary filter and the adsorption filter are in working state through the opening and closing structure, and the electrostatic purification unit is working and the photocatalytic unit can be turned on as needed. Therefore, the above method also includes: if it is determined that the purification mode of the central range hood is the third purification mode, the angle between the axial direction of the primary filter and the adsorption filter and the axial direction of the flue is adjusted through the opening and closing structure, so that the primary filter and the adsorption filter are both in working state.

[0067] In actual use, when the opening and closing structure adjusts the presentation state of the filter unit, its driving shaft can be fixedly connected to one of the edges of the filter structure; the driver can use a motor to drive the driving shaft to rotate, and the driving shaft is used to drive the filter structure to be retracted to a position corresponding to the inner wall direction of the purification channel; in actual use, the driving shaft can be set to retract the positive fan filter structure to one side of the inner wall of the purification channel, wherein, Figure 3 The filter unit shown is an implementation in which a drive shaft is provided and the drive shaft is fixed to one edge of the filter structure.

[0068] In addition, two drive shafts can be provided to set the filter structure to be opened in the middle, and when folded, it can be folded on both sides of the purification channel. Furthermore, the number of drive shafts can be set according to actual usage.

[0069] Furthermore, the drive shaft can also be fixedly connected to a position corresponding to the center line of the filter structure; when the driver drives the drive shaft to rotate, the drive shaft is used to drive the filter structure to rotate, so as to adjust the angle between the axial direction of the filter structure and the axial direction of the flue or the purification channel. For example, the drive shaft is set in the middle of the filter structure and parallel to the plane where the filter structure is located. When the opening and closing structure drives the filter structure to be retracted, the angle between the filter structure and the axial direction of the flue can be changed, thereby changing the presentation state of the filter structure. The specific setting method of the drive shaft can be set according to the actual use situation, and the embodiment of the present invention does not limit this.

[0070] For ease of understanding, Figure 1 On the basis of Figure 4 A schematic diagram of the structure of another purification treatment device is shown, wherein: Figure 4 In the example, the purification channel includes a primary filter 401, an electrostatic purification unit 402, a photocatalytic unit 403 and an adsorption filter 404 arranged in sequence. Further, Figure 4 The cleaning device also includes an oil fume odor detection unit 405 disposed at the entrance of the purification channel, and a fan 102 disposed downstream of the adsorption filter along the air flow direction.

[0071] In actual use, Figure 4The primary filter includes a fume filter, the adsorption filter includes an activated carbon adsorption filter, further, the electrostatic purification unit includes an electrostatic purifier, and the photocatalytic unit includes a UV (ultraviolet) purifier, such as an ultraviolet lamp, etc. And, Figure 4 As shown, the purification treatment device also includes a hood 406; wherein the hood 406 is also arranged at the outlet position of the purification channel, further, the purification treatment device is also provided with a muffler 407; the muffler 407 is arranged at the outlet position of the fan 102 to reduce the noise generated by the fan.

[0072] Further, based on Figure 4 The purification treatment device shown, after determining the purification mode of the central range hood, needs to be combined with the purification treatment device to further determine the resistance coefficient of the central range hood according to the purification mode; then the target fan frequency of the central range hood is calculated based on the resistance coefficient, and the target fan frequency is determined as the target purification parameter of the central range hood.

[0073] Among them, the step of determining the resistance coefficient of the central range hood according to the purification mode includes: if the purification mode is the first purification mode, the resistance coefficient of the central range hood is determined to be α=θ2+θ3, wherein α is the resistance coefficient, θ2 is the resistance coefficient of the electrostatic purification unit, and θ3 is the resistance coefficient of the photocatalytic unit; if the purification mode is the second purification mode, the resistance coefficient of the central range hood is determined to be α=θ1+θ2+θ3, wherein θ1 is the resistance coefficient of the primary filter; if the purification mode is the third purification mode, the resistance coefficient of the central range hood is determined to be α=θ1+θ2+θ3+θ4, wherein θ4 is the resistance coefficient of the adsorption filter.

[0074] The above drag coefficient is a coefficient that characterizes the ability of each purification unit to generate wind resistance. The larger the drag coefficient, the stronger the wind resistance generated. Figure 4 Taking the purification treatment device shown in the figure as an example, since the primary filter and the adsorption filter are respectively arranged in the purification channel through their own opening and closing structures, the primary filter and the adsorption filter can be in a retracted state or in a working state, and the electrostatic purification unit and the photocatalytic unit are fixed in the purification channel, whether they are turned on or not, they will generate a certain wind resistance. Therefore, based on Figure 4 In the purification treatment device shown, the total resistance coefficient of the central range hood usually has three forms, corresponding to the first purification mode, the second purification mode and the third purification mode respectively.

[0075] In actual use, the above θ1-θ4 can usually be set according to product specifications and experimental data, and the embodiment of the present invention is not limited to this.

[0076] Further, based on the above drag coefficient, the target fan frequency of the central range hood can be calculated according to the following formula:

[0077] F = α * F_inc * k + F_init;

[0078] Wherein, F is the target fan frequency, F_init is the preset initial frequency, F_inc is the preset frequency increment, and k is the number of turned-on terminal components in the common flue.

[0079] Specifically, taking the concentration of the cooking fume odor as C, the preset first concentration threshold as C1, and the second concentration threshold as C2 as examples for illustration, and C1 < C2, based on Figure 4 the purification treatment device shown, the purification function control method of the central range hood provided by the embodiments of the present invention may include the following steps:

[0080] (1) After the fan of the main unit operates stably, detect that the concentration of the cooking fume odor before entering the central range hood is C;

[0081] (2) Determine whether C is less than the preset first concentration threshold C1. If C < C1, determine that the purification mode of the central range hood is the first purification mode, that is, only use the electrostatic adsorption function to purify the cooking fume waste gas. At this time, the primary filter 401 and the adsorption filter 404 are retracted, the photocatalytic unit is turned off, the electrostatic purification unit is turned on, and the drag coefficient of the central range hood is α = θ2 + θ3. Calculate the target fan frequency of the central range hood according to the following formula: F = α * F_inc * k + F_init, obtain the current fan frequency and adjust it.

[0082] (3) If C1 ≤ C < C2, then determine that the purification mode of the central range hood is the second purification mode. At this time, adjust the primary filter 401 to be in the working state through the opening and closing structure, and purify the cooking fume through the primary filter and the electrostatic purification unit. At this time, the drag coefficient α of the central range hood is α = θ1 + θ2 + θ3. Similarly, obtain the current fan frequency and adjust it.

[0083] (4) If C ≥ C2, that is, the concentration of the cooking fume odor is in a high-concentration state. At this time, the primary filter 401 and the adsorption filter 404 can be adjusted to be in the working state through the opening and closing structure, that is, Figure 4 the primary filter 401, the electrostatic purification unit 402, the photocatalytic unit 403, and the adsorption filter 404 in

[0084] Therefore, the purification function control method of the central range hood provided by the embodiments of the present invention is equivalent to an intelligent purification control method, which can realize the adjustment of the purification method of the central range hood and realize the control of the purification module (such as Figure 4The maximum efficiency of the primary filter, electrostatic purification unit, photocatalytic unit and adsorption filter, etc., is utilized to reduce the resistance of some purification modules, thereby reducing the impact on the power of the fan, achieving the goal of high efficiency and energy saving while maintaining the purification effect.

[0085] Further, based on the above embodiment, the embodiment of the present invention also provides a purification function control device for a central range hood, such as Figure 5 The schematic diagram of the structure of a purification function control device of a central range hood is shown, and the device comprises:

[0086] An acquisition module 50 is used to acquire the concentration of oil fume odor, wherein the concentration of oil fume odor is the concentration data of oil fume odor in the public flue collected before the oil fume exhaust gas enters the central range hood;

[0087] A determination module 52, for determining a purification mode of the central range hood based on the oil fume odor concentration;

[0088] A calculation module 54, used for calculating the target purification parameters of the central range hood corresponding to the purification mode;

[0089] The adjustment module 56 is used to adjust the fan of the central range hood according to the target purification parameter to control the purification function of the central range hood.

[0090] The purification function control device of the central range hood provided in the embodiment of the present invention has the same technical features as the purification function control method of the central range hood provided in the above embodiment, so it can also solve the same technical problems and achieve the same technical effects.

[0091] Furthermore, an embodiment of the present invention also provides a central range hood, comprising a controller, and a host and a terminal component connected to the controller;

[0092] The controller is set with Figure 5 The purification function control device of the central range hood shown in the figure; the main unit is installed at the outlet of the common flue, and is used to assist in exhausting the oil fume waste gas inside the common flue; the terminal component communicates with the main unit, and is used to control the exhaust functions of multiple kitchens that exhaust smoke through the common flue; wherein the main unit includes an oil fume odor detection unit, a purification channel, a fan, a muffler and a hood arranged in sequence along the airflow direction, and the purification channel is provided with at least one purification unit for purifying the oil fume waste gas entering the main unit.

[0093] Furthermore, at least one purification unit includes a primary filter, an electrostatic purification unit, a photocatalytic unit and an adsorption filter arranged in sequence along the airflow direction; wherein the primary filter and the adsorption filter are arranged in the purification channel of the central range hood through an opening and closing structure.

[0094] Furthermore, the plurality of purification units included in the main unit may constitute a purification treatment device of a central range hood, for example, Figure 4 The purification treatment device shown in FIG. Figure 4 Taking the purification device shown in the figure as an example, Figure 6 A working process of a central range hood is also shown, comprising the following steps:

[0095] Step S602, the host starts;

[0096] Step S604, waiting for the fan to run stably;

[0097] Step S606, obtaining the oil fume odor concentration C;

[0098] Step S608, determining whether the oil fume odor concentration C is less than a preset first concentration threshold C1; if yes, executing step S610; if no, executing step S614;

[0099] Step S610, retract the primary filter and the adsorption filter, turn off the photocatalytic unit, and turn on the electrostatic purification unit;

[0100] Step S612, calculating the resistance coefficient of the central range hood as α=θ2+θ3;

[0101] Step S614, determining whether the oil fume odor concentration C is greater than or equal to a first concentration threshold C1 and less than a second concentration threshold C2; wherein C1<C2; if yes, executing step S616, if no, executing step S620;

[0102] Step S616, put down the primary filter, turn on the electrostatic purification unit; put away the adsorption filter, and turn off the photocatalytic unit;

[0103] Step S618, calculating the resistance coefficient of the central range hood as α=θ1+θ2+θ3;

[0104] Step S620, put down the primary filter and the adsorption filter; turn on the electrostatic purification unit and the photocatalytic unit;

[0105] Step S622, calculating the resistance coefficient of the central range hood as α=θ1+θ2+θ3+θ4;

[0106] Step S624, calculating the target fan frequency of the central range hood to control the purification function of the central range hood.

[0107] After executing S624, the process may return to step S604 until the host is shut down.

[0108] The steps of setting the target fan frequency of the central range hood include:

[0109] The target fan frequency of the central range hood is calculated according to the following formula: F = α*Fdi*k+Finitial;

[0110] Among them, F is the target fan frequency, Finitial is the preset initial frequency, Fpost is the preset frequency increase value, and k is the number of terminal components turned on in the public flue.

[0111] In summary, the central range hood provided in the embodiment of the present invention can set different purification modes according to the concentration of oil fume odor. At the same time, it can also reduce the purification wind resistance at low concentrations, and then calculate the appropriate power frequency according to the resistance coefficient of the central range hood corresponding to the purification mode, thereby achieving the purpose of high efficiency and energy saving of the central range hood.

[0112] The computer program product of the central range hood and its purification function control method and device provided in the embodiment of the present invention includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the method described in the previous method embodiment. The specific implementation can be found in the method embodiment, which will not be repeated here.

[0113] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the central range hood and the device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0114] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0115] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0116] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0117] Finally, it should be noted that the above embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that any person skilled in the art can still modify the technical solutions recorded in the above embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A method for controlling the purification function of a central range hood, It is characterized in that The method comprises: Obtaining the concentration of oil fume odor, wherein the concentration of oil fume odor is the concentration data of oil fume odor in the public flue collected before the oil fume exhaust gas enters the central range hood; Determining a purification mode of the central range hood based on the oil fume odor concentration; Calculating target purification parameters of the central range hood corresponding to the purification mode; adjusting the fan of the central range hood according to the target purification parameter to control the purification function of the central range hood; The step of calculating the target purification parameters of the central range hood corresponding to the purification mode includes: determining a resistance coefficient of the central range hood according to the purification mode; Calculating a target fan frequency of the central range hood based on the resistance coefficient, and determining the target fan frequency as a target purification parameter of the central range hood; The central range hood is equipped with a primary filter, an electrostatic purification unit, a photocatalytic unit and an adsorption filter arranged in sequence along the airflow direction; The step of determining the resistance coefficient of the central range hood according to the purification mode comprises: If the purification mode is the first purification mode, the resistance coefficient of the central range hood is determined to be α=θ2+θ3, wherein α is the resistance coefficient, θ2 is the resistance coefficient of the electrostatic purification unit, and θ3 is the resistance coefficient of the photocatalytic unit; If the purification mode is the second purification mode, the resistance coefficient of the central range hood is determined to be α=θ1+θ2+θ3, where θ1 is the resistance coefficient of the primary filter; If the purification mode is the third purification mode, the resistance coefficient of the central range hood is determined to be α=θ1+θ2+θ3+θ4, where θ4 is the resistance coefficient of the adsorption filter; The step of calculating the target fan frequency of the central range hood based on the resistance coefficient comprises: The target fan frequency of the central range hood is calculated according to the following formula: F=α*Fdi*k+Finitial; Among them, F is the target fan frequency, Finitial is the preset initial frequency, Fpost is the preset frequency increase value, and k is the number of terminal components in the public flue that are turned on.

2. The method according to claim 1, It is characterized in that The step of determining the purification mode of the central range hood based on the oil fume odor concentration comprises: Obtaining a pre-configured correspondence between a concentration threshold and a purification mode; wherein the correspondence between the concentration threshold and the purification mode is used to characterize purification modes corresponding to different concentration thresholds, and the higher the concentration threshold, the stronger the purification capability of the corresponding purification mode; The purification mode of the central range hood is determined according to the oil fume odor concentration and the corresponding relationship between the concentration threshold and the purification mode.

3. The method according to claim 2, It is characterized in that The step of determining the purification mode of the central range hood according to the oil fume odor concentration and the corresponding relationship between the concentration threshold and the purification mode comprises: If the oil fume odor concentration is less than a preset first concentration threshold, determining that the purification mode of the central range hood is a first purification mode, wherein the first purification mode is a mode for purifying oil fume exhaust gas using an electrostatic adsorption function; If the oil fume odor concentration is greater than or equal to the first concentration threshold, and less than a preset second concentration threshold, the purification mode of the central range hood is determined to be the second purification mode, wherein the second purification mode is a mode for purifying oil fume exhaust gas using the electrostatic adsorption function and the filtering function; If the oil fume odor concentration is greater than or equal to the second concentration threshold, the purification mode of the central range hood is determined to be the third purification mode, wherein the third purification mode is a mode of purifying oil fume exhaust gas using the electrostatic adsorption function, the filtering function and the decomposition function, and the decomposition function also includes a catalytic decomposition function and / or an adsorption decomposition function, wherein the first concentration threshold is less than the second concentration threshold.

4. The method according to claim 1, It is characterized in that The primary filter is used to realize the primary filtering function of the gas of the central range hood; the electrostatic purification unit is used to realize the electrostatic adsorption function of the central range hood; the photocatalytic unit is used to realize the catalytic decomposition function of the central range hood; the adsorption filter is used to realize the adsorption and decomposition function of the central range hood; Furthermore, the primary filter and the adsorption filter are arranged in the purification channel of the central range hood through an opening and closing structure; The method further comprises: If it is determined that the purification mode of the central range hood is the first purification mode, adjusting the angle between the axial direction of the primary filter and the adsorption filter and the axial direction of the purification channel through the opening and closing structure so that the primary filter and the adsorption filter are in a retracted state; If it is determined that the purification mode of the central range hood is the second purification mode, the angles between the axes of the primary filter and the adsorption filter and the axis of the purification channel are adjusted by the opening and closing structure, so that the primary filter is in a working state, and the adsorption filter is in a retracted state; If it is determined that the purification mode of the central range hood is the third purification mode, the angles between the axial directions of the primary filter and the adsorption filter and the axial direction of the purification channel are adjusted through the opening and closing structure so that both the primary filter and the adsorption filter are in working state.

5. A central range hood purification function control device, It is characterized in that The central range hood is equipped with a primary filter, an electrostatic purification unit, a photocatalytic unit and an adsorption filter arranged in sequence along the airflow direction; the device comprises: An acquisition module, used for acquiring the concentration of oil fume odor, wherein the concentration of oil fume odor is the concentration data of the oil fume odor in the public flue collected before the oil fume exhaust gas enters the central range hood; A determination module, used to determine the purification mode of the central range hood based on the oil fume odor concentration; A calculation module, used for calculating target purification parameters of the central range hood corresponding to the purification mode; An adjustment module, configured to adjust the fan of the central range hood according to the target purification parameter to control the purification function of the central range hood; The calculation module is further configured to determine the resistance coefficient of the central range hood according to the purification mode; calculate the target fan frequency of the central range hood based on the resistance coefficient, and determine the target fan frequency as the target purification parameter of the central range hood; The calculation module is further configured to, if the purification mode is the first purification mode, determine that the resistance coefficient of the central range hood is α = θ2 + θ3, where α is the resistance coefficient, θ2 is the resistance coefficient of the electrostatic purification unit, and θ3 is the resistance coefficient of the photocatalytic unit; if the purification mode is the second purification mode, determine that the resistance coefficient of the central range hood is α = θ1 + θ2 + θ3, where θ1 is the resistance coefficient of the primary filter; if the purification mode is the third purification mode, determine that the resistance coefficient of the central range hood is α = θ1 + θ2 + θ3 + θ4, where θ4 is the resistance coefficient of the adsorption filter; The calculation module is further configured to calculate the target fan frequency of the central range hood according to the following formula: F = α * F递 * k + F初; where F is the target fan frequency, F初 is the preset initial frequency, F递 is the preset frequency increment, and k is the number of turned-on terminal components in the common flue.

6. A central range hood, Characterized in that, It includes a controller, as well as a main unit and a terminal component connected to the controller; Wherein the controller is provided with the purification function control device of the central range hood according to claim 5; The main unit is installed at the outlet of the common flue and is used to assist in exhausting the oil fume waste gas inside the common flue; The terminal component communicates with the main unit and is used to control the kitchen exhaust functions of multiple kitchens that exhaust fumes through the common flue; Wherein, the main unit includes an oil fume odor detection unit, a purification channel, a fan, a silencer, and a wind cap arranged in sequence along the air flow direction, and at least one purification unit is arranged in the purification channel for purifying the oil fume waste gas entering the main unit.

7. The central range hood according to claim 6, Characterized in that, At least one purification unit includes a primary filter, an electrostatic purification unit, a photocatalytic unit, and an adsorption filter arranged in sequence along the air flow direction; Wherein, the primary filter and the adsorption filter are arranged in the purification channel of the central range hood through an opening and closing structure.

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