A method, apparatus, and online monitoring instrument for detecting oil fume concentration.

Abstract

This invention discloses a method, apparatus, and online oil fume monitoring instrument for detecting oil fume concentration. The method includes: acquiring the humidity value and concentration detection value of the oil fume gas in the current detection period; determining whether the humidity value in the current detection period is greater than a first preset humidity value; if so, acquiring first working state information of a heating plate; determining whether the heating plate is in a closed state based on the first working state information; if so, controlling the working state of the heating plate to switch from a closed state to an open state; acquiring the average humidity influence value in the current detection period; acquiring the actual concentration value in the current detection period based on the average humidity influence value and the concentration detection value, and returning to execute the steps of acquiring the humidity value and concentration detection value of the oil fume gas in the current detection period. This method can improve the accuracy of oil fume concentration detection when the humidity of the detected gas is high and can extend the service life of the online oil fume monitoring instrument.

Description

Technical Field

[0001] This invention relates to the field of environmental monitoring technology, and in particular to a method, apparatus, and online monitoring instrument for detecting oil fume concentration. Background Technology

[0002] In recent years, complaints about excessive cooking fumes in the catering industry have been gradually increasing, seriously affecting people's daily lives. Cooking fumes refer to the volatile oils, organic matter, and their heating decomposition or cracking products emitted during food cooking and processing. They include particulate matter and VOCs (volatile organic compounds), and their emissions contribute to both PM2.5 and ozone pollution.

[0003] Currently, online fume monitoring devices are commonly installed in the kitchens of catering establishments to monitor fume emissions online, enabling early prevention and control. These devices are typically installed on the roof. However, the light scattering sensors they use tend to overestimate fume concentrations in high-humidity environments, being significantly affected by moisture. For example, water vapor from steamers contains very low levels of oil particles, yet the light scattering sensor overestimates the fume concentration due to the steam. Furthermore, high humidity levels in the detected gas can easily cause condensation to enter the sensor, leading to corrosion and damage, and a shorter lifespan. Summary of the Invention

[0004] This invention provides a method, device, and online oil fume monitoring instrument for detecting oil fume concentration, in order to solve the problems of low accuracy and short service life of online oil fume monitoring instruments due to high humidity of the detected gas.

[0005] According to one aspect of the present invention, a method for detecting oil fume concentration is provided, applied to an online oil fume monitoring instrument. The online oil fume monitoring instrument includes a hose reel, a particle sensor, and a controller. The hose reel includes a housing, a flexible tube, and a heating plate. The flexible tube is connected to the particle sensor via a pipeline. The controller is connected to the particle sensor and the heating plate. The method for detecting oil fume concentration is executed by the controller. The method for detecting oil fume concentration includes:

[0006] Obtain the humidity and concentration values ​​of the oil fume gas in the current detection period;

[0007] Determine whether the humidity value in the current detection cycle is greater than a first preset humidity value;

[0008] If so, then obtain the first working state information of the heating plate;

[0009] Determine whether the heating plate is in the off state based on the first working status information;

[0010] If so, the working state of the heating plate is switched from the off state to the on state;

[0011] Obtain the average humidity effect value for the current detection period;

[0012] The actual concentration value for the current detection period is obtained based on the average humidity influence value and the concentration detection value for the current detection period, and the process returns to the step of obtaining the humidity value and concentration detection value of the oil fume gas for the current detection period.

[0013] Optionally, if it is determined that the heating plate is in the on state based on the first working state information, then the step of obtaining the average value of humidity influence in the current detection cycle is performed.

[0014] Optionally, when it is determined that the humidity value of the current detection cycle is not greater than a first preset humidity value, it is determined whether the humidity value of the current detection cycle is less than a second preset humidity value.

[0015] If not, proceed to the step of obtaining the average humidity effect value for the current detection cycle;

[0016] The second preset humidity value is less than the first preset humidity value.

[0017] Optionally, if it is determined that the humidity value of the current detection cycle is less than the second preset humidity value, then the concentration detection value of the current detection cycle is determined as the actual concentration value of the current detection cycle, and the process returns to the step of obtaining the humidity value and concentration detection value of the oil fume gas in the current detection cycle.

[0018] Optionally, if it is determined that the humidity value of the current detection cycle is less than the second preset humidity value, then the concentration detection value of the current detection cycle is determined as the actual concentration value of the current detection cycle, and the second working status information of the heating plate is obtained.

[0019] Determine whether the heating plate is in the on state based on the second working status information;

[0020] If so, the operating state of the heating plate is switched from the on state to the off state, and the process returns to the step of obtaining the humidity value and concentration detection value of the oil fume gas in the current detection cycle.

[0021] Optionally, if it is determined from the second working status information that the heating plate is in the off state, then return to the step of obtaining the humidity value and concentration detection value of the oil fume gas in the current detection cycle.

[0022] Optionally, before switching the operating state of the heating plate from the on state to the off state, the method further includes:

[0023] Obtain the average humidity impact value for the current detection period.

[0024] Optionally, obtain the average humidity impact value for the current detection period, including:

[0025] Obtain the concentration detection value of the oil fume gas in the previous detection period and the average value of the humidity effect in the previous detection period;

[0026] The humidity influence factor for the current testing period is determined based on the concentration detection value of the previous testing period and the concentration detection value of the current testing period.

[0027] The mean humidity influence value for the current detection period is determined based on the humidity influence factor for the current detection period and the mean humidity influence value for the previous detection period.

[0028] According to another aspect of the present invention, a device for detecting oil fume concentration is provided, applied to an online oil fume monitoring instrument. The online oil fume monitoring instrument includes a hose reel, a particle sensor, and a controller. The hose reel includes a housing, a flexible tube, and a heating plate. The flexible tube is connected to the particle sensor via a pipeline. The controller is connected to the particle sensor and the heating plate. The oil fume concentration detection device is integrated into the controller. The device for calculating oil fume concentration includes:

[0029] The first information acquisition module is used to acquire the humidity value and concentration detection value of the oil fume gas in the current detection cycle;

[0030] The first humidity judgment module is used to determine whether the humidity value in the current detection cycle is greater than the first preset humidity value;

[0031] The first working status information acquisition module is used to acquire the first working status information of the heating plate when the first humidity judgment module determines that the humidity value of the current detection cycle is greater than the first preset humidity value.

[0032] The first working state determination module is used to determine whether the heating plate is in the off state based on the first working state information.

[0033] The first state control module is used to control the working state of the heating plate to switch from the closed state to the open state when the first working state judgment module determines that the heating plate is in the closed state according to the first working state information.

[0034] The first humidity influence mean acquisition module is used to acquire the humidity influence mean of the current detection cycle;

[0035] The first actual concentration value acquisition module is used to acquire the actual concentration value of the current detection period based on the average humidity influence value and the concentration detection value of the current detection period.

[0036] The first loop module is used to return to the first information acquisition module to execute the step of acquiring the humidity value and concentration detection value of the oil fume gas in the current detection period after the first actual concentration value acquisition module acquires the actual concentration value of the current detection period based on the average humidity influence value and the concentration detection value of the current detection period.

[0037] According to another aspect of the present invention, an online oil fume monitoring device is provided, including a hose reel, a particle sensor, and a controller;

[0038] The hose reel includes a housing, a hose, and a heating plate, and the hose is connected to the particle sensor tubing.

[0039] The controller is connected to the particle sensor and the heating plate;

[0040] The controller is used to perform the above-described method for detecting the concentration of cooking fumes.

[0041] The oil fume concentration detection method provided in this invention acquires the humidity and concentration values ​​of the oil fume gas in real time, compares the humidity value of the current detection period with a first preset humidity value to determine whether the humidity of the oil fume gas is high, determines the working state of the heating plate when the humidity of the oil fume gas is high, and controls the heating plate to switch to the on state when it is in the off state, so as to dehumidify the oil fume gas. After determining that the heating plate is in the on state, the average humidity influence value of the current detection period is acquired, so that the actual concentration value of the current detection period can be obtained based on the average humidity influence value and the concentration detection value of the current detection period. This achieves more accurate detection of oil fume gas concentration under high humidity conditions. Furthermore, heating and dehumidifying the oil fume gas by the heating plate when the humidity is high can prevent the particle sensor from being corroded and damaged by moisture, extend the service life of the particle sensor, and thus ensure the service life of the online oil fume monitoring instrument.

[0042] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of the structure of an online oil fume monitoring device provided in an embodiment of the present invention;

[0045] Figure 2 yes Figure 1 A schematic diagram of the structure of the online oil fume monitoring device along the AB direction;

[0046] Figure 3 This is a flowchart of a method for detecting oil fume concentration provided in an embodiment of the present invention;

[0047] Figure 4 This is a flowchart of another method for detecting oil fume concentration provided in an embodiment of the present invention;

[0048] Figure 5 This is a flowchart of another method for detecting oil fume concentration provided in an embodiment of the present invention;

[0049] Figure 6 This is a flowchart of another method for detecting oil fume concentration provided in an embodiment of the present invention;

[0050] Figure 7 This is a schematic diagram of the structure of a fume concentration detection device provided in an embodiment of the present invention. Detailed Implementation

[0051] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0052] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0053] This invention provides a method for detecting oil fume concentration, which is applied to an online oil fume monitoring instrument. This method can improve the accuracy of oil fume concentration detection when the humidity of the gas is high and can extend the service life of the online oil fume monitoring instrument. The oil fume concentration detection method can be executed by the oil fume concentration detection device provided in this invention. The oil fume concentration detection device can be implemented in the form of software and / or hardware, and the oil fume concentration detection device can be configured in the controller of the online oil fume monitoring instrument.

[0054] Figure 1 This is a schematic diagram of the structure of an online oil fume monitoring device provided in an embodiment of the present invention. Figure 2 yes Figure 1 A schematic diagram of the structure of the online oil fume monitoring device along the AB direction, in conjunction with reference. Figure 1 and Figure 2 The online oil fume monitoring device 00 includes a hose reel 1, a particle sensor 2, and a controller 3. The hose reel 1 includes a housing 11, a hose 12, and a heating plate 13. The hose 12 is connected to the particle sensor 2 through a pipeline. The controller 3 is connected to the particle sensor 2 and the heating plate 13 (not shown in the figure), and the oil fume concentration detection method is executed by the controller 3.

[0055] Specifically, the online oil fume monitor 00 can collect oil fume gas from the kitchen through the sampling tube 4. The oil fume gas enters the flexible hose 12 through the sampling tube 4. The flexible hose 12 can be wound around the reel 14 of the hose reel 1, and the outlet of the flexible hose 12 can be connected to the particle sensor 2 through a pipeline. In this way, the concentration of oil fume gas can be detected by the particle sensor 2. A humidity sensor (not shown in the figure) can be installed at the outlet of the flexible hose 12, or a humidity sensor can be installed in the particle sensor 2 to detect the humidity of the oil fume gas. Both the particle sensor 2 and the humidity sensor are electrically or communicatively connected to the controller 3 to send the acquired detection signals to the controller 3. The heating plate 13 can be installed on the inner wall of the housing 11 and can switch its working state under the control of the controller 3. When the heating plate 13 is in the on state, it can realize the heating function to dry the gas in the flexible hose 12.

[0056] For example, the online fume monitor 00 may further include a filter element 5 and a diaphragm pump 6. After passing through the particle sensor 2, the oil fume gas can be discharged outside the online fume monitor 00 via the filter element 5 and the diaphragm pump 6 in sequence. The filter element 5 is used to filter oil fume particles in the oil fume gas, reducing air pollution from the discharged gas, while the diaphragm pump 6 is used to draw the gas outside the online fume monitor 00.

[0057] The online oil fume monitor 00 may also include a switching power supply 7 to provide power to the controller 3, particle sensor 2, humidity sensor, etc.

[0058] Based on the above-mentioned online oil fume monitoring device, Figure 3 This is a flowchart of a method for detecting oil fume concentration provided in an embodiment of the present invention, such as... Figure 3 As shown, the method includes:

[0059] S110. Obtain the humidity and concentration values ​​of the oil fume gas in the current detection cycle.

[0060] Specifically, a humidity sensor can detect the humidity of the oil fume gas transmitted to the particle sensor. The humidity sensor can send the humidity detection signal to the controller in real time, allowing the controller to determine the humidity value of the oil fume gas in the current detection cycle. The humidity value can be expressed as a percentage. The concentration of the oil fume gas can be detected by the particle sensor. The particle sensor can detect the concentration signal of the oil fume gas in real time and send it to the controller, which can then determine the concentration value. The detection cycle refers to the period during which the controller acquires the detection signals. It can be understood as the controller acquiring both the humidity and concentration detection signals once within one detection cycle. The controller acquires the humidity and concentration values ​​of the oil fume gas once in each detection cycle, meaning it acquires these values ​​in real time.

[0061] S120. Determine whether the humidity value of the current detection cycle is greater than the first preset humidity value; if so, proceed to step S130.

[0062] Specifically, the first preset humidity value can be the boundary between high and moderate humidity. If the humidity value exceeds the first preset humidity value, it indicates that the humidity of the oil fume gas is high. In this case, the concentration detection signal detected by the particle sensor is greatly affected by humidity, and the accuracy of the obtained concentration detection value is low. If the humidity value is equal to or lower than the first preset humidity value, it indicates that the humidity of the oil fume gas is moderate or low, and the concentration detection value is relatively accurate. Therefore, the humidity value obtained in the current detection period can be compared with the first preset humidity value to determine whether the reliability of the concentration detection value obtained in the current detection period is low. The first preset humidity value can be set according to design requirements, for example, it can be 35%.

[0063] S130: Obtain the first working status information of the heating plate.

[0064] Specifically, when the controller switches the operating state of the heating plate, it synchronously sets the corresponding operating state information. After determining that the humidity value of the current detection cycle is greater than a first preset humidity value, it acquires the operating state information of the heating plate at this time, i.e., the first operating state information. The first operating state information of the heating plate includes information indicating the on state and information indicating the off state. For example, "1" can be used to indicate the on state of the heating plate, and "0" can be used to indicate the off state of the heating plate. When the heating plate is in the on state, it has a heating function; when the heating plate is in the off state, it stops heating.

[0065] For example, if it is determined that the humidity value of the current detection cycle is not greater than the first preset humidity value, the step of obtaining the humidity value and concentration detection value of the oil fume gas in the current detection cycle can be returned. Alternatively, it can be determined whether the humidity value is within the threshold range of medium humidity or whether the humidity value is within the threshold range of low humidity. This embodiment of the invention does not specifically limit this.

[0066] S140. Determine whether the heating plate is in the off state based on the first working state information; if yes, proceed to step S150; if no, proceed to step S160.

[0067] Specifically, "T1" can be used as a symbol to represent the first working state of the heating plate. Based on the information of the first working state, it can be determined whether the heating plate is in the off state, that is, whether T1 is equal to 0. If T1 = 0, it can be determined that the heating plate is in the off state.

[0068] S150, switch the working state of the heating plate from the off state to the on state.

[0069] Specifically, if the heating plate is in the off state when the humidity value of the oil fume gas is determined to be greater than the first preset humidity value, an on control signal is sent to the heating plate to control the working state of the heating plate to switch from the off state to the on state, so that the heating plate can heat and dry the gas in the hose and reduce the moisture of the oil fume gas transmitted to the particle sensor.

[0070] S160. Obtain the average humidity effect value for the current detection cycle.

[0071] Specifically, once the humidity value exceeds a first preset humidity value and the heating plate is confirmed to be in the on state, the average humidity influence value for the current detection cycle can be obtained. The average humidity influence value can be understood as the average coefficient representing the degree of influence of humidity on the concentration detection value. As the humidity value changes, the concentration detection value obtained by the particle sensor also changes, meaning the degree of humidity influence also changes. Therefore, the corresponding average humidity influence value can be obtained for each detection cycle.

[0072] For example, when obtaining the average humidity influence value of the current detection period, you can first obtain the concentration detection value of the oil fume gas in the previous detection period and the average humidity influence value of the previous detection period. Then, you can determine the humidity influence factor of the current detection period based on the concentration detection value of the previous detection period and the concentration detection value of the current detection period. Finally, you can determine the average humidity influence value of the current detection period based on the humidity influence factor of the current detection period and the average humidity influence value of the previous detection period.

[0073] Specifically, assuming the current detection period is the nth period, the concentration detection value is ρ′, the humidity influence factor is k, and the average humidity influence value is kj, then the concentration detection value of the oil fume gas in the previous detection period is ρ′(n-1), the average humidity influence value in the previous detection period is kj(n-1), the concentration detection value in the current detection period is ρ′(n), and the humidity influence factor in the current detection period is k(n). The humidity influence factor k(n) for the current detection period can be determined by the ratio of the concentration detection value ρ′(n) in the current detection period to the concentration detection value ρ′(n-1) in the previous detection period, i.e., k(n) = ρ′(n) / ρ′(n-1). The average of the humidity influence factor k(n) for the current detection period and the average humidity influence value kj(n-1) in the previous detection period can be used as the average humidity influence value kj(n) for the current detection period, i.e., kj(n) = [k(n) + kj(n-1)] / 2. It can be understood that n is an integer greater than or equal to 0. When n = 1, that is, the first detection cycle, the average value of the humidity influence obtained in the previous detection cycle is kj(0), and the concentration detection value obtained in the previous detection cycle is ρ′(0). Then kj(0) can be the initial value of the average value of humidity influence, which can be 1. ρ′(0) can be the initial value of the concentration detection value, and can be assigned the value ρ′(0) = ρ′(1).

[0074] In addition, if the humidity value is greater than the first preset humidity value, and the heating plate is determined to be in the on state based on the first working state information, the average humidity influence value of the current detection cycle is directly obtained, and the working state of the heating plate is not switched.

[0075] S170. Obtain the actual concentration value for the current detection period based on the average humidity influence and concentration detection value of the current detection period, and return to step S110.

[0076] Specifically, the actual concentration value for the current detection period can be obtained by multiplying the average humidity influence value of the current detection period by the concentration detection value of the current detection period. This method ensures higher accuracy by taking into account the humidity effect. Assuming the current detection period is n, then ρ(n) = kj(n) * ρ′(n), where ρ(n) represents the actual concentration value of the current detection period. After obtaining the actual concentration value ρ(n) for the current detection period, the process can return to obtaining the humidity and concentration detection values ​​of the oil fume gas for the current detection period. During the heating process, the humidity value, the corresponding average humidity influence value, and the actual concentration value are continuously acquired, recorded, and stored. This allows for the acquisition of highly accurate actual concentration values ​​in each detection period while dehumidifying the oil fume gas, achieving more precise monitoring of oil fume concentration and extending the lifespan of the particle sensor, thus ensuring the overall lifespan of the online oil fume monitoring instrument.

[0077] The oil fume concentration detection method provided in this invention acquires the humidity and concentration values ​​of the oil fume gas in real time, compares the humidity value of the current detection period with a first preset humidity value to determine whether the humidity of the oil fume gas is high, determines the working state of the heating plate when the humidity of the oil fume gas is high, and controls the heating plate to switch to the on state when it is in the off state, so as to dehumidify the oil fume gas. After determining that the heating plate is in the on state, the average humidity influence value of the current detection period is acquired, so that the actual concentration value of the current detection period can be obtained based on the average humidity influence value and the concentration detection value of the current detection period. This achieves more accurate detection of oil fume gas concentration under high humidity conditions. Furthermore, heating and dehumidifying the oil fume gas by the heating plate when the humidity is high can prevent the particle sensor from being corroded and damaged by moisture, extend the service life of the particle sensor, and thus ensure the service life of the online oil fume monitoring instrument.

[0078] Optional, Figure 4 This is a flowchart of another method for detecting oil fume concentration provided in an embodiment of the present invention, such as... Figure 4 As shown, the method for detecting the concentration of cooking fumes includes:

[0079] S211. Obtain the humidity and concentration values ​​of the oil fume gas in the current detection cycle.

[0080] S212. Determine whether the humidity value of the current detection cycle is greater than the first preset humidity value; if yes, proceed to step S213; if no, proceed to step S218.

[0081] S213. Obtain the first working status information of the heating plate.

[0082] S214. Determine whether the heating plate is in the off state based on the first working state information; if yes, proceed to step S215; otherwise, proceed to step S216.

[0083] S215. Control the heating plate to switch its working state from off to on.

[0084] S216. Obtain the average humidity effect value for the current detection cycle.

[0085] S217. Obtain the actual concentration value for the current detection period based on the average humidity influence and concentration detection value of the current detection period; and return to step S211.

[0086] S218. Determine whether the humidity value of the current detection cycle is less than the second preset humidity value; if not, proceed to step S216; if yes, proceed to step S219.

[0087] Specifically, the second preset humidity value can be the boundary between moderate and low humidity, meaning the second preset humidity value is less than the first preset humidity value. This second preset humidity can be set according to design requirements, for example, it can be 30%. If it is determined that the humidity value of the current detection cycle is not greater than the first preset humidity value, it can then be determined whether the humidity value is less than the second preset humidity value. If it is determined that the humidity value is not less than the second preset humidity value, that is, if it is determined that the humidity value of the current detection cycle is between the second preset humidity value and the first preset humidity value, then it can be determined that the oil fume gas is in a moderate humidity condition. At this time, the concentration detection signal detected by the particle sensor is still affected by humidity, but the degree of influence is low. At this time, the working state of the heating plate does not need to be switched, and the original working state of the heating plate is maintained. That is, if the humidity value is between the second preset humidity value and the first preset humidity value, if the heating plate is in the on state, it remains in the on state until the humidity value is lower than the second preset humidity value, at which point the heating plate is controlled to turn off. If the heating plate is in the off state, it also remains in the off state until the humidity value rises to a level greater than the first preset humidity value, at which point the heating plate is controlled to turn on.

[0088] To further ensure the accuracy of the actual concentration, when the humidity value is between the second preset humidity value and the first preset humidity value, the average humidity influence value is still obtained, and the actual concentration value is determined based on the average humidity influence value and the concentration detection value of the current detection cycle.

[0089] S219. Determine the concentration detection value of the current detection period as the actual concentration value of the current detection period.

[0090] Specifically, if the humidity value of the current detection cycle is determined to be less than the second preset humidity value, it can be determined that the humidity of the oil fume gas is low and it is in a relatively dry state. At this time, the concentration detection signal obtained by the particle sensor is less affected by the moisture. The concentration detection value determined by the controller based on the concentration detection signal is more accurate. At this time, the concentration detection value can be directly used as the actual concentration value of the current detection cycle.

[0091] For example, after determining that the humidity value of the current detection cycle is less than the second preset humidity value, the initial value kj(0) of the humidity influence mean can be determined as the humidity influence mean of the current detection cycle. If the humidity value of the next detection cycle is greater than the first preset humidity value, the humidity influence mean of the next detection cycle can be determined based on the humidity influence mean and the humidity influence factor.

[0092] In addition, after using the concentration detection value of the current detection period as the actual concentration value of the current detection period, the process can return to the step of obtaining the humidity value and concentration detection value of the oil fume gas in the current detection period, so as to achieve continuous monitoring of the humidity value and the actual concentration value.

[0093] Optional, Figure 5 This is a flowchart of another method for detecting oil fume concentration provided in an embodiment of the present invention, such as... Figure 5 As shown, the method for detecting the concentration of cooking fumes includes:

[0094] S311. Obtain the humidity and concentration values ​​of the oil fume gas in the current detection cycle.

[0095] S312. Determine whether the humidity value of the current detection cycle is greater than the first preset humidity value; if yes, proceed to step S313; if no, proceed to step S318.

[0096] S313. Obtain the first working status information of the heating plate.

[0097] S314. Determine whether the heating plate is in the off state based on the first working state information; if yes, proceed to step S315; otherwise, proceed to step S316.

[0098] S315. Control the heating plate to switch its working state from off to on.

[0099] S316. Obtain the average humidity effect value for the current detection cycle.

[0100] S317. Obtain the actual concentration value for the current detection period based on the average humidity influence and concentration detection value of the current detection period; and return to step S311.

[0101] S318. Determine whether the humidity value of the current detection cycle is less than the second preset humidity value; if not, proceed to step S313; if yes, proceed to step S319.

[0102] S319. Determine the concentration detection value of the current detection cycle as the actual concentration value of the current detection cycle, and obtain the second working status information of the heating plate.

[0103] Specifically, when it is determined that the humidity value of the oil fume gas is less than the second preset humidity value, i.e., the oil fume gas is relatively dry, while determining the concentration detection value of the previous detection cycle as the actual concentration value of the current detection cycle, the working status information of the heating plate at this time can also be obtained, i.e., the second working status information. It can be understood that the first and second working status information are the working status information of the heating plate obtained under different oil fume gas humidity conditions, and they are essentially the same, both including information indicating the on state and information indicating the off state, and the way they are represented can be the same. For example, "T2" can be used to represent the second working state of the heating plate. T2 = 1 indicates that the heating plate is in the on state when the humidity value of the oil fume gas is less than the second preset humidity value, and T2 = 0 indicates that the heating plate is in the off state when the humidity value of the oil fume gas is less than the second preset humidity value.

[0104] S320. Determine whether the heating plate is in the on state based on the second working state information; if yes, proceed to step S321; if no, return to step S311.

[0105] S321, Control the heating plate to switch its working state from the on state to the off state; and return to the execution step S311.

[0106] Specifically, when the humidity value of the oil fume gas is lower than the second preset humidity value, if the heating plate is determined to be in the on state, the heating plate is controlled to turn off, that is, the heating plate stops heating to reduce energy consumption, and the process returns to the step of obtaining the humidity value and concentration value of the oil fume gas for the current detection period, so as to achieve real-time detection of the humidity and actual concentration value of the oil fume gas. However, if the humidity value of the oil fume gas is lower than the second preset humidity value and the heating plate is determined to be in the off state, it is not necessary to switch the working state of the heating plate; the process can directly return to the step of obtaining the humidity value and concentration value of the oil fume gas for the current detection period, so as to achieve real-time detection of the humidity and actual concentration value of the oil fume gas.

[0107] For example, the above method can be understood as follows: if the humidity value of the oil fume gas is determined to be greater than the first preset humidity in the current detection cycle, the heating plate is controlled to remain on for dehumidification, and the actual concentration value with high accuracy is calculated in real time based on the concentration detection value and the average value of humidity influence during the heating process, until the humidity value of the oil fume gas is less than the second preset humidity, the heating plate is controlled to turn off to stop heating and dehumidification, and the currently acquired concentration detection value is directly used as the actual concentration value.

[0108] If the humidity of the oil fume gas is determined to be between the second preset humidity value and the first preset humidity value during the current detection cycle, the heating plate remains in its original state, and the average humidity effect and concentration detection value are acquired in real time to calculate the actual concentration value with higher accuracy. During this period, if the heating plate remains in the off state, the humidity of the oil fume gas will increase until the humidity value rises above the first preset humidity value, at which point the heating plate is controlled to turn on for heating and dehumidification. Conversely, if the heating plate remains in the on state during this period, the humidity of the oil fume gas will decrease until the humidity value drops to the second preset humidity value, at which point the heating plate is controlled to turn off to stop heating and dehumidification, and the currently acquired concentration detection value is directly used as the actual concentration value.

[0109] Optional, Figure 6 This is a flowchart of another method for detecting oil fume concentration provided in an embodiment of the present invention, such as... Figure 6 As shown, the method for detecting the concentration of cooking fumes includes:

[0110] S411. Obtain the humidity and concentration values ​​of the oil fume gas in the current detection cycle.

[0111] S412. Determine whether the humidity value of the current detection cycle is greater than the first preset humidity value; if yes, proceed to step S413; if no, proceed to step S418.

[0112] S413. Obtain the first working status information of the heating plate.

[0113] S414. Determine whether the heating plate is in the off state based on the first working state information; if yes, proceed to step S415; otherwise, proceed to step S416.

[0114] S415. Control the heating plate to switch its working state from off to on.

[0115] S416. Obtain the average humidity effect value for the current detection cycle.

[0116] S417. Obtain the actual concentration value for the current detection period based on the average humidity influence and concentration detection value for the current detection period; and return to step S311.

[0117] S418. Determine whether the humidity value of the current detection cycle is less than the second preset humidity value; if not, proceed to step S413; if yes, proceed to step S419.

[0118] S419. Determine the concentration detection value of the current detection cycle as the actual concentration value of the current detection cycle, and obtain the second working status information of the heating plate.

[0119] S420. Determine whether the heating plate is in the on state based on the second working state information; if yes, proceed to step S421; if no, return to step S423.

[0120] S421. Obtain the average humidity effect value for the current detection cycle.

[0121] Specifically, if the heating plate is in the on state when the humidity value is equal to or less than the second preset humidity value, it indicates that the humidity value decreased because the heating plate was turned on when the humidity value was greater than the first preset humidity value. Since the average humidity influence value of the current detection cycle is determined by the average humidity influence value of the previous detection cycle and the humidity influence factor of the current detection cycle, this average humidity influence value is more accurate than the initial value ki(0) of the average humidity influence value. Therefore, the average humidity influence value of the current detection cycle can be obtained. Thus, if the humidity value is greater than the first preset humidity in the next detection cycle, the actual concentration value of the next detection cycle can be determined based on the average humidity influence value and the concentration detection value of the next detection cycle, making the actual concentration value of the next detection cycle more accurate. The method of obtaining the average humidity influence value can be the same as the method of obtaining the average humidity influence value when the humidity value is greater than the first preset humidity value in the above embodiment, and will not be described again in this embodiment.

[0122] S422, Control the heating plate to switch its working state from the on state to the off state; and return to the execution step S411.

[0123] S423. Use the initial value of the humidity influence mean as the humidity influence mean for the current detection cycle; and return to step S411.

[0124] Specifically, if the heating plate is in the off state when the humidity value is equal to or less than the second preset humidity value, it means that the humidity value has always been in a low state. At this time, the influence of humidity can be ignored. Therefore, the initial value of the average humidity influence can be used as the average humidity influence of the current detection cycle. In this way, when the humidity value in the next detection cycle is greater than the first preset humidity, the actual concentration value of the next detection cycle can be determined according to the initial value of the average humidity influence and the concentration detection value of the next detection cycle, so that the actual concentration value of the next detection cycle is more accurate.

[0125] Based on the same inventive concept, embodiments of the present invention also provide a device for detecting oil fume concentration. This device is used to execute the oil fume concentration detection method provided in any embodiment of the present invention. The device can be implemented by software and / or hardware, and can be integrated into the controller of the online oil fume monitoring instrument provided in embodiments of the present invention. Therefore, the oil fume concentration detection device provided in embodiments of the present invention includes the technical features of the oil fume concentration detection method provided in any embodiment of the present invention, and can achieve the beneficial effects of the oil fume concentration detection method provided in any embodiment of the present invention. Similarities can be referred to the above description of the oil fume concentration detection method provided in embodiments of the present invention, and will not be repeated here.

[0126] Reference Figure 1 and Figure 2 The online oil fume monitoring device 00 includes a hose reel 1, a particle sensor 2, and a controller 3. The hose reel 1 includes a housing 11, a hose 12, and a heating plate 13. The hose 12 is connected to the particle sensor 2 through a pipeline. The controller 3 is connected to the particle sensor 2 and the heating plate 13, and the oil fume concentration detection device is integrated into the controller 3.

[0127] Based on the above-mentioned online oil fume monitoring device 00, Figure 7 This is a schematic diagram of the structure of a fume concentration detection device provided in an embodiment of the present invention, as shown below. Figure 7 As shown, the oil fume concentration detection device includes: a first information acquisition module 10, used to acquire the humidity value and concentration detection value of the oil fume gas in the current detection cycle; a first humidity judgment module 20, used to determine whether the humidity value in the current detection cycle is greater than a first preset humidity value; a first working status information acquisition module 30, used to acquire the first working status information of the heating plate when the first humidity judgment module determines that the humidity value in the current detection cycle is greater than the first preset humidity value; a first working status judgment module 40, used to determine whether the heating plate is in a closed state based on the first working status information; and a first status control module 50, used to control the heating plate according to the first working status information obtained by the first working status judgment module 40. When the status information determines that the heating plate is in the off state, the operating state of the heating plate is switched from the off state to the on state; the first humidity influence average value acquisition module 60 is used to acquire the humidity influence average value of the current detection cycle; the first actual concentration value acquisition module 70 is used to acquire the actual concentration value of the current detection cycle based on the humidity influence average value and the concentration detection value of the current detection cycle; the first loop module 80 is used to return to the first information acquisition module to execute the step of acquiring the humidity value and concentration detection value of the oil fume gas of the current detection cycle after the first actual concentration value acquisition module acquires the actual concentration value of the current detection cycle based on the humidity influence average value and the concentration detection value of the current detection cycle.

[0128] The oil fume concentration detection device provided in this embodiment of the invention can achieve relatively accurate detection of oil fume gas concentration under high humidity conditions. Furthermore, when the oil fume gas humidity is high, it can be dehumidified by heating the gas with a heating plate, which can prevent the particle sensor from being corroded and damaged by moisture, extend the service life of the particle sensor, and thus ensure the service life of the online oil fume monitoring instrument.

[0129] Optional, see reference Figure 7 The first humidity influence mean acquisition module 70 is also used to acquire the humidity influence mean of the current detection cycle when the first working state judgment module 40 determines that the heating plate is in the on state based on the first working state information.

[0130] Optionally, the fume concentration detection device further includes a second humidity judgment module, used to determine whether the humidity value of the current detection period is less than a second preset humidity value when the first humidity judgment module determines that the humidity value of the current detection period is not greater than a first preset humidity value; the first humidity influence average acquisition module is also used to acquire the humidity influence average of the current detection period when the second humidity judgment module determines that the humidity value of the current detection period is less than the second preset humidity value. Wherein, the second preset humidity value is less than the first preset humidity value.

[0131] Optionally, the oil fume concentration detection device further includes a second actual concentration value acquisition module, used to determine the concentration detection value of the current detection period as the actual concentration value of the current detection period when the second humidity judgment module determines that the humidity value of the current detection period is less than the second preset humidity value; and a second loop module, used to return to the first information acquisition module to execute the steps of acquiring the humidity value and concentration detection value of the oil fume gas in the current detection period after the second actual concentration value acquisition module determines the concentration detection value of the current detection period as the actual concentration value of the current detection period.

[0132] Optionally, the oil fume concentration detection device further includes a second working status information acquisition module, used to acquire the second working status information of the heating plate after the second humidity judgment module determines that the humidity value of the current detection cycle is less than the second preset humidity value; a second working status judgment module, used to determine whether the heating plate is in the on state based on the second working status information; a second status control module, used to control the working state of the heating plate to switch from the on state to the off state when the second working status judgment module determines that the heating plate is in the on state based on the second working status information; and a third loop module, used to return to the first information acquisition module to execute the steps of acquiring the humidity value and concentration detection value of the oil fume gas in the current detection cycle after the second status control module controls the working state of the heating plate to switch from the on state to the off state.

[0133] Optionally, the oil fume concentration detection device also includes a fourth circulation module, which is used to return to the first information acquisition module to perform the step of acquiring the humidity value and concentration detection value of the oil fume gas in the current detection cycle when the second working state judgment module determines that the heating plate is in the off state according to the second working state information.

[0134] Optionally, the oil fume concentration detection device also includes a second humidity influence average acquisition module, used to acquire the humidity influence average of the current detection cycle before the second state control module controls the heating plate to switch from the on state to the off state.

[0135] Optionally, the functional units of the first humidity influence mean acquisition module and the second humidity influence mean acquisition module can be the same, and each can include a first information acquisition unit, used to acquire the concentration detection value of oil fume gas in the previous detection period and the humidity influence mean of the previous detection period; a humidity influence factor determination unit, used to determine the humidity influence factor of the current detection period based on the concentration detection value of the previous detection period and the concentration detection value of the current detection period; and a humidity influence mean determination unit, used to determine the humidity influence mean of the current detection period based on the humidity influence factor of the current detection period and the humidity influence mean of the previous detection period.

[0136] Based on the same inventive concept, embodiments of the present invention also provide an online oil fume monitoring device, in conjunction with reference to [reference needed]. Figure 1 and Figure 2 The online oil fume monitoring device includes a hose reel 1, a particle sensor 2, and a controller 3. The hose reel 1 includes a housing 11, a flexible hose 12, and a heating plate 13. The flexible hose 12 is connected to the particle sensor 2 via a pipeline. The controller 3 is connected to the particle sensor 2 and the heating plate 13. The controller 3 is used to execute the oil fume concentration detection method provided in any embodiment of the present invention. The oil fume concentration detection device is used to execute the oil fume concentration detection method provided in any embodiment of the present invention. Therefore, the online oil fume monitoring device provided in the embodiments of the present invention includes the technical features of the oil fume concentration detection method provided in any embodiment of the present invention, and can achieve the beneficial effects of the oil fume concentration detection method provided in any embodiment of the present invention. The similarities can be referred to the above description of the oil fume concentration detection method provided in the embodiments of the present invention, and will not be repeated here.

[0137] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0138] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for detecting oil fume concentration, applied to an online oil fume monitoring instrument, the online oil fume monitoring instrument comprising a hose reel, a particle sensor, and a controller, the hose reel comprising a housing, a flexible hose, and a heating plate, the flexible hose being connected to the particle sensor via a pipeline, the controller being connected to the particle sensor and the heating plate, and the method for detecting oil fume concentration being executed by the controller, characterized in that, The method for detecting the concentration of cooking fumes includes: Obtain the humidity and concentration values ​​of the oil fume gas in the current detection period; Determine whether the humidity value in the current detection cycle is greater than a first preset humidity value; If so, then obtain the first working state information of the heating plate; Determine whether the heating plate is in the off state based on the first working status information; If so, the working state of the heating plate is switched from the off state to the on state; Obtain the average humidity effect value for the current detection period; The actual concentration value for the current detection period is obtained based on the average humidity influence value and the concentration detection value for the current detection period, and the process returns to the step of obtaining the humidity value and concentration detection value of the oil fume gas for the current detection period; wherein, the actual concentration value for the current detection period is the product of the average humidity influence value and the concentration detection value for the current detection period. Obtain the average humidity impact value for the current detection period, including: Obtain the concentration detection value of the oil fume gas in the previous detection period and the average humidity influence value of the previous detection period; determine the humidity influence factor of the current detection period based on the concentration detection value of the previous detection period and the concentration detection value of the current detection period; determine the average humidity influence value of the current detection period based on the humidity influence factor of the current detection period and the average humidity influence value of the previous detection period. The humidity influence factor for the current detection period is the ratio of the concentration detection value for the current detection period to the concentration detection value for the previous detection period, and the average humidity influence for the current detection period is the average of the humidity influence factor for the current detection period and the average humidity influence for the previous detection period.

2. The method for detecting oil fume concentration according to claim 1, characterized in that, If it is determined that the heating plate is in the on state based on the first working state information, then the step of obtaining the average value of humidity influence in the current detection cycle is executed.

3. The method for detecting oil fume concentration according to claim 1, characterized in that, Also includes: When it is determined that the humidity value in the current detection cycle is not greater than the first preset humidity value, it is determined whether the humidity value in the current detection cycle is less than the second preset humidity value. If not, proceed to the step of obtaining the average humidity effect value for the current detection cycle; The second preset humidity value is less than the first preset humidity value.

4. The method for detecting oil fume concentration according to claim 3, characterized in that, If it is determined that the humidity value of the current detection cycle is less than the second preset humidity value, then the concentration detection value of the current detection cycle is determined as the actual concentration value of the current detection cycle, and the process returns to the step of obtaining the humidity value and concentration detection value of the oil fume gas in the current detection cycle.

5. The method for detecting oil fume concentration according to claim 3, characterized in that, If it is determined that the humidity value of the current detection cycle is less than the second preset humidity value, then the concentration detection value of the current detection cycle is determined as the actual concentration value of the current detection cycle, and the second working status information of the heating plate is obtained. Determine whether the heating plate is in the on state based on the second working status information; If so, the operating state of the heating plate is switched from the on state to the off state, and the process returns to the step of obtaining the humidity value and concentration detection value of the oil fume gas in the current detection cycle.

6. The method for detecting oil fume concentration according to claim 5, characterized in that, If it is determined from the second working status information that the heating plate is in the off state, then return to the step of obtaining the humidity value and concentration detection value of the oil fume gas in the current detection cycle.

7. The method for detecting oil fume concentration according to claim 5, characterized in that, Before switching the operating state of the heating plate from the on state to the off state, the following steps are also included: Obtain the average humidity impact value for the current detection period.

8. A device for detecting oil fume concentration, applied to an online oil fume monitoring instrument, the online oil fume monitoring instrument comprising a hose reel, a particle sensor, and a controller, the hose reel comprising a housing, a flexible hose, and a heating plate, the flexible hose being connected to the particle sensor via a pipeline, the controller being connected to the particle sensor and the heating plate, and the oil fume concentration detection device being integrated into the controller, characterized in that, The device for calculating the oil fume concentration includes: The first information acquisition module is used to acquire the humidity value and concentration detection value of the oil fume gas in the current detection cycle; The first humidity judgment module is used to determine whether the humidity value in the current detection cycle is greater than the first preset humidity value; The first working status information acquisition module is used to acquire the first working status information of the heating plate when the first humidity judgment module determines that the humidity value of the current detection cycle is greater than the first preset humidity value. The first working state determination module is used to determine whether the heating plate is in the off state based on the first working state information. The first state control module is used to control the working state of the heating plate to switch from the closed state to the open state when the first working state judgment module determines that the heating plate is in the closed state based on the first working state information. The first humidity influence mean acquisition module is used to acquire the humidity influence mean of the current detection cycle; The first actual concentration value acquisition module is used to acquire the actual concentration value of the current detection period based on the average humidity influence value and the concentration detection value of the current detection period. The first loop module is used to return to the first information acquisition module to execute the step of acquiring the humidity value and concentration detection value of the oil fume gas in the current detection period after the first actual concentration value acquisition module acquires the actual concentration value of the current detection period based on the average humidity influence value and the concentration detection value of the current detection period; wherein, the actual concentration value of the current detection period is the product of the average humidity influence value and the concentration detection value of the current detection period; The first humidity influence mean acquisition module includes: a first information acquisition unit, used to acquire the concentration detection value of the oil fume gas in the previous detection period and the humidity influence mean of the previous detection period; a humidity influence factor determination unit, used to determine the humidity influence factor of the current detection period based on the concentration detection value of the previous detection period and the concentration detection value of the current detection period; and a humidity influence mean determination unit, used to determine the humidity influence mean of the current detection period based on the humidity influence factor of the current detection period and the humidity influence mean of the previous detection period. The humidity influence factor for the current detection period is the ratio of the concentration detection value for the current detection period to the concentration detection value for the previous detection period, and the average humidity influence for the current detection period is the average of the humidity influence factor for the current detection period and the average humidity influence for the previous detection period.

9. An online monitoring device for cooking fumes, characterized in that, Includes a hose reel, particle sensor, and controller; The hose reel includes a housing, a hose, and a heating plate, and the hose is connected to the particle sensor tubing. The controller is connected to the particle sensor and the heating plate; The controller is used to perform the method for detecting the concentration of oil fumes according to any one of claims 1 to 7.

Images