Oil fume concentration monitor and control method of oil fume concentration monitor

Abstract

This invention provides an oil fume concentration monitor and its control method, comprising: a controller, a diaphragm air pump, a flow meter, a filter element, a particle sensor, a heating device, and a sampling point; the sampling point is located inside the exhaust duct; if the controller receives a start signal, it controls the diaphragm air pump to draw in the oil fume to be monitored from the sampling point; the heating device heats the oil fume to be monitored at a constant temperature; the flow meter detects the oil fume flow rate; the controller also determines whether the oil fume flow rate is within a preset flow range; based on the relationship between the oil fume flow rate and the preset flow range, and the oil fume flow rate, a first temperature of the heating device is determined; the heating device is controlled to heat the oil fume to be monitored at the first temperature; and the particle sensor detects the oil fume concentration of the oil fume to be monitored. This oil fume concentration monitor determines the first temperature of the heating device by detecting the relationship between the oil fume flow rate and the preset flow range, thereby reducing the operating power consumption of the oil fume concentration monitor.

Description

Technical Field

[0001] This invention relates to the field of oil fume monitoring technology, and in particular to an oil fume concentration monitor and a control method for the oil fume concentration monitor. Background Technology

[0002] Online fume monitoring devices are typically used in environments with heavy oil fume production, such as restaurants and government canteens. These devices use filters and filter cartridges to filter the oil fumes and extend the lifespan of internal components. However, after prolonged use, when the filters and filter cartridges become heavily contaminated, gas collection becomes difficult. If the fume concentration monitor continues to heat at a preset temperature, it will result in high power consumption. Summary of the Invention

[0003] The purpose of this invention is to provide an oil fume concentration monitor and a control method for the oil fume concentration monitor, thereby reducing the operating power consumption of the oil fume concentration monitor due to filter blockage.

[0004] In a first aspect, embodiments of the present invention provide an oil fume concentration monitor, comprising: a controller, a diaphragm air pump, a flow meter, a filter element, a particle sensor, a heating device, and a sampling tube; the controller, the diaphragm air pump, the flow meter, the filter element, the particle sensor, the heating device, and the sampling tube are connected in sequence; a sampling point is set at a preset position on the sampling tube; the sampling point is set inside an exhaust pipe; the controller is configured to, upon receiving a start signal, control the diaphragm air pump to compress air to generate a negative pressure difference in the sampling tube, thereby drawing in the oil fume to be monitored from the sampling point; The aforementioned heating device is used to heat the oil fume to be monitored at a preset temperature at a constant temperature; the aforementioned filter element is used to filter the oil fume particles in the oil fume to be monitored; the aforementioned flow meter is used to detect the oil fume flow rate of the oil fume to be monitored; the aforementioned controller is also used to determine whether the oil fume flow rate of the oil fume to be monitored is within a preset flow range; based on the relationship between the oil fume flow rate and the preset flow range and the oil fume flow rate, a first temperature of the aforementioned heating device is determined; the aforementioned heating device is controlled to heat the oil fume to be monitored at the aforementioned first temperature; and the aforementioned particle sensor is used to detect the oil fume concentration of the oil fume to be monitored.

[0005] In a preferred embodiment of the present invention, the controller is further configured to determine the first temperature of the heating device as the preset temperature if the relationship between the oil fume flow rate and the preset flow range is that the oil fume flow rate is within the preset flow range.

[0006] In a preferred embodiment of the present invention, the controller is further configured to determine the first temperature of the heating device based on the oil fume flow rate if the relationship between the oil fume flow rate and the preset flow range is that the oil fume flow rate is not within the preset flow range.

[0007] In a preferred embodiment of the present invention, the controller is further configured to determine whether the oil fume flow rate is greater than a preset threshold; if the oil fume flow rate is less than or equal to the preset threshold, control the issuance of a filter maintenance signal.

[0008] Secondly, embodiments of the present invention also provide a control method for an oil fume concentration meter, applied to an oil fume concentration monitor according to any one of the first to third possible embodiments of the first aspect, comprising: upon receiving a start signal, controlling the diaphragm air pump to compress air to generate a negative pressure difference in the sampling tube to draw in oil fume to be monitored from the sampling point; heating the oil fume to be monitored at a preset temperature using the heating device; detecting the oil fume flow rate of the oil fume to be monitored using the flow meter; determining whether the oil fume flow rate of the oil fume to be monitored is within a preset flow range; determining a first temperature of the heating device based on the relationship between the oil fume flow rate and the preset flow range and the oil fume flow rate; and controlling the heating device to heat the oil fume to be monitored at the first temperature.

[0009] In a preferred embodiment of the present invention, the step of determining the first temperature of the heating device based on the relationship between the oil fume flow rate and the preset flow rate range and the oil fume flow rate includes: if the relationship between the oil fume flow rate and the preset flow rate range is that the oil fume flow rate is within the preset flow rate range, then the first temperature is determined to be the preset temperature.

[0010] In a preferred embodiment of the present invention, the step of determining the first temperature of the heating device based on the relationship between the oil fume flow rate and the preset flow rate range and the oil fume flow rate includes: if the relationship between the oil fume flow rate and the preset flow rate range is that the oil fume flow rate is not within the preset flow rate range, determining the first temperature of the heating device based on the oil fume flow rate.

[0011] In a preferred embodiment of the present invention, the step of determining the first temperature of the heating device based on the oil fume flow rate includes: determining the first temperature of the heating device based on the oil fume flow rate using the following formula: Where k is the preset temperature compensation coefficient, Q is the preset standard flow rate, q0 is the oil fume flow rate, T0 is the preset temperature, and T is the first temperature.

[0012] In a preferred embodiment of the present invention, after the step of controlling the heating device to heat the oil fume to be monitored at the first temperature, the method further includes: determining whether the oil fume flow rate is greater than a preset threshold; if not, detecting the oil fume concentration of the oil fume to be monitored by the particle sensor; compensating the oil fume concentration based on a preset concentration compensation coefficient to obtain the compensated oil fume concentration, and controlling the output of the compensated oil fume concentration.

[0013] In a preferred embodiment of the present invention, the step of compensating the above-mentioned oil fume concentration based on a preset concentration compensation coefficient to obtain a compensated oil fume concentration includes: compensating the above-mentioned oil fume concentration based on the preset concentration compensation coefficient using the following formula to obtain a compensated oil fume concentration: Wherein, k0 is the preset concentration compensation coefficient, ρ0 is the oil fume concentration, ρ is the compensated oil fume concentration, Q is the preset standard flow rate, and q is the oil fume flow rate.

[0014] The embodiments of the present invention bring the following beneficial effects:

[0015] This invention provides an oil fume concentration monitor and its control method, comprising: a controller, a diaphragm air pump, a flow meter, a filter element, a particle sensor, a heating device, and a sampling tube; the controller, diaphragm air pump, flow meter, filter element, particle sensor, heating device, and sampling tube are sequentially connected; a sampling point is set at a preset position on the sampling tube; the sampling point is located inside an exhaust duct; the controller is configured to, upon receiving a start signal, control the diaphragm air pump to compress air to generate a negative pressure difference in the sampling tube, drawing in the oil fume to be monitored from the sampling point. The monitoring device includes a heating element for heating the oil fume at a preset temperature, a filter element for filtering oil fume particles, a flow meter for detecting the flow rate of the oil fume, a controller for determining whether the flow rate of the oil fume is within a preset flow range, a first temperature of the heating element based on the relationship between the oil fume flow rate and the preset flow range, and the oil fume flow rate itself. The device is then controlled to heat the oil fume at the first temperature. A particle sensor is used to detect the concentration of the oil fume. This oil fume concentration monitor determines the first temperature of the heating element by detecting the relationship between the oil fume flow rate and the preset flow range, thereby reducing the power consumption of the monitor by determining a reasonable first temperature.

[0016] Other features and advantages of the invention will be set forth in the following description, or some features and advantages may be inferred from the description or determined without doubt, or may be learned by practicing the techniques described above.

[0017] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of an oil fume concentration monitor provided in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of another oil fume concentration monitor provided in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the third type of oil fume concentration monitor provided in the embodiments of the present invention;

[0022] Figure 4 This is a flowchart illustrating a control method for an oil fume concentration monitor provided in an embodiment of the present invention.

[0023] Icons: 11-Controller; 12-Diaphragm air pump; 13-Flow meter; 14-Filter element; 15-Particle sensor; 16-Heating device; 17-Sampling tube; 32-Switching power supply; 33-Circuit breaker. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Currently, online fume monitoring devices are generally used in environments with heavy oil fumes, such as restaurants and government canteens. These devices typically use filters to filter the fumes and extend the lifespan of internal components. However, after prolonged use, when the filters become heavily contaminated, gas collection becomes difficult. If the fume concentration monitor continues to heat at a preset temperature, it will result in high power consumption.

[0026] To address the aforementioned problems, this invention provides an oil fume concentration monitor and a method for monitoring oil fume concentration. The oil fume concentration monitor determines a first temperature of the heating device by detecting the relationship between the oil fume flow rate and a preset flow range, and further reduces the operating power consumption of the oil fume concentration monitor by determining a reasonable first temperature. To facilitate understanding of this embodiment, a detailed description of the oil fume concentration monitor disclosed in this invention is provided first.

[0027] Example 1

[0028] Figure 1 This is a schematic diagram of the structure of an oil fume concentration monitor provided in an embodiment of the present invention.

[0029] Depend on Figure 1 As seen, the oil fume concentration monitor includes: a controller 11, a diaphragm air pump 12, a flow meter 13, a filter element 14, a particle sensor 15, a heating device 16, and a sampling tube 17; the controller 11, the diaphragm air pump 12, the flow meter 13, the filter element 14, the particle sensor 15, the heating device 16, and the sampling tube 17 are connected in sequence; a sampling point is set at a preset position on the sampling tube 17; the sampling point is set inside the exhaust duct.

[0030] In this embodiment, the controller 11 is configured to, upon receiving a start signal, control the diaphragm air pump 12 to compress air to generate a negative pressure difference in the sampling tube, thereby drawing in the oil fume to be monitored from the sampling point; the heating device 16 is configured to heat the oil fume to be monitored at a preset temperature; the filter element 14 is configured to filter the oil fume particles of the oil fume to be monitored; the flow meter 13 is configured to detect the oil fume flow rate of the oil fume to be monitored; the controller 11 is further configured to determine whether the oil fume flow rate of the oil fume to be monitored is within a preset flow range; determine a first temperature of the heating device 16 based on the relationship between the oil fume flow rate and the preset flow range and the oil fume flow rate; control the heating device 16 to heat the oil fume to be monitored at the first temperature; and the particle sensor 15 is configured to detect the oil fume concentration of the oil fume to be monitored.

[0031] In one embodiment, the controller 11 is further configured to determine the first temperature of the heating device 16 as the preset temperature if the relationship between the oil fume flow rate and the preset flow range is that the oil fume flow rate is within the preset flow range.

[0032] In one embodiment, the controller 11 is further configured to determine the first temperature of the heating device based on the oil fume flow rate if the relationship between the oil fume flow rate and the preset flow range is that the oil fume flow rate is not within the preset flow range.

[0033] Here, the first temperature of the heating device is determined based on the above-mentioned oil fume flow rate using the following formula:

[0034] ;

[0035] Where k is the preset temperature compensation coefficient, Q is the preset standard flow rate, q0 is the oil fume flow rate, T0 is the preset temperature, and T is the first temperature.

[0036] In one embodiment, the controller 11 is further configured to determine whether the oil fume flow rate is greater than a preset threshold; if the oil fume flow rate is less than or equal to the preset threshold, control the issuance of a filter maintenance signal.

[0037] In one embodiment, the controller 11 is further configured to: determine whether the oil fume flow rate is greater than a preset threshold; if so, detect the oil fume concentration of the oil fume to be monitored by a particle sensor and output the oil fume concentration; if not, detect the oil fume concentration of the oil fume to be monitored by the particle sensor; compensate the oil fume concentration based on a preset concentration compensation coefficient to obtain the compensated oil fume concentration, and control the output of the compensated oil fume concentration.

[0038] Here, the above-mentioned oil fume concentration is compensated based on a preset concentration compensation coefficient using the following formula to obtain the compensated oil fume concentration:

[0039] ;

[0040] Wherein, k0 is the preset concentration compensation coefficient, ρ0 is the oil fume concentration, ρ is the compensated oil fume concentration, Q is the preset standard flow rate, and q is the oil fume flow rate.

[0041] Furthermore, the aforementioned oil fume concentration monitor also includes a switching power supply 32 connected to the aforementioned controller 11, the aforementioned diaphragm air pump 12, the aforementioned heating device 16, and the aforementioned particle sensor 15; the aforementioned switching power supply 32 is used to supply power to the aforementioned controller 11, the aforementioned diaphragm air pump 12, the aforementioned heating device 16, and the aforementioned particle sensor 15.

[0042] For ease of understanding, Figure 2 This is a schematic diagram of the structure of a second type of oil fume concentration monitor provided in an embodiment of the present invention.

[0043] Depend on Figure 2 As can be seen, sampling points are set at preset positions on the sampling tube 17; the sampling points are set inside the exhaust pipe.

[0044] For ease of understanding, Figure 3 This is a schematic diagram of the structure of the third type of oil fume concentration monitor provided in an embodiment of the present invention.

[0045] Depend on Figure 3 As can be seen, the aforementioned oil fume concentration monitor also includes a circuit breaker 33 connected to the aforementioned switching power supply 32; the aforementioned circuit breaker 33 is used to disconnect the aforementioned switching power supply 32 when the line voltage is overloaded.

[0046] This invention provides an oil fume concentration monitor, comprising: a controller, a diaphragm air pump, a flow meter, a filter element, a particle sensor, a heating device, and a sampling tube; the controller, the diaphragm air pump, the flow meter, the filter element, the particle sensor, the heating device, and the sampling tube are sequentially connected; a sampling point is set at a preset position on the sampling tube; the sampling point is located inside the exhaust pipe; the controller is used to, upon receiving a start signal, control the diaphragm air pump to compress air to generate a negative pressure difference in the sampling tube, thereby drawing in the oil fume to be monitored from the sampling point; the heating device... The device is used to heat the oil fume to be monitored at a preset temperature; the filter element is used to filter oil fume particles from the oil fume to be monitored; the flow meter is used to detect the oil fume flow rate of the oil fume to be monitored; the controller is also used to determine whether the oil fume flow rate of the oil fume to be monitored is within a preset flow range; based on the relationship between the oil fume flow rate and the preset flow range, and the oil fume flow rate, a first temperature of the heating device is determined; the heating device is controlled to heat the oil fume to be monitored at the first temperature; and the particle sensor is used to detect the oil fume concentration of the oil fume to be monitored. This oil fume concentration monitor determines the first temperature of the heating device by detecting the relationship between the oil fume flow rate and the preset flow range, and further reduces the operating power consumption of the oil fume concentration monitor by determining a reasonable first temperature.

[0047] Example 2

[0048] Based on Example 1, this example provides a control method for an oil fume concentration monitor, which is applied to the oil fume concentration monitor in Example 1. Figure 4 This is a flowchart illustrating a control method for an oil fume concentration monitor provided in an embodiment of the present invention.

[0049] Depend on Figure 4 As seen, the method includes:

[0050] Step S401: If a start signal is received, control the diaphragm air pump to compress air to generate a negative pressure difference in the sampling tube and draw in the oil fumes to be monitored from the sampling point.

[0051] Step S402: The oil fume to be monitored is heated at a preset temperature using the heating device described above.

[0052] Step S403: Detect the flow rate of the oil fume to be monitored using the flow meter described above.

[0053] Step S404: Determine whether the flow rate of the oil fume to be monitored is within the preset flow rate range.

[0054] Step S405: Determine the first temperature of the heating device based on the relationship between the oil fume flow rate and the preset flow range, as well as the oil fume flow rate.

[0055] In this embodiment, step S405 includes: if the relationship between the oil fume flow rate and the preset flow range is that the oil fume flow rate is within the preset flow range, the first temperature is determined to be the preset temperature; if the relationship between the oil fume flow rate and the preset flow range is that the oil fume flow rate is not within the preset flow range, the first temperature of the heating device is determined based on the oil fume flow rate.

[0056] Furthermore, the step of determining the first temperature of the heating device based on the aforementioned oil fume flow rate includes:

[0057] The first temperature of the heating device is determined using the following formula based on the aforementioned oil fume flow rate:

[0058] ;

[0059] Where k is the preset temperature compensation coefficient, Q is the preset standard flow rate, q0 is the oil fume flow rate, T0 is the preset temperature, and T is the first temperature.

[0060] Step S406: Control the heating device to heat the oil fume to be monitored at the first temperature.

[0061] In actual operation, after step S406 above, the method further includes the following steps A1-A2:

[0062] Step A1: Determine whether the above-mentioned oil fume flow rate is greater than the preset threshold.

[0063] Step A2: If not, detect the oil fume concentration of the oil fume to be monitored by the particle sensor; compensate the oil fume concentration based on the preset concentration compensation coefficient to obtain the compensated oil fume concentration, and control the output of the compensated oil fume concentration.

[0064] In this embodiment, after step A1, the method further includes: if the oil fume flow rate is greater than a preset threshold, detecting the oil fume concentration of the oil fume to be monitored by a particle sensor and outputting the oil fume concentration.

[0065] In one embodiment, the step of compensating the above-mentioned oil fume concentration based on a preset concentration compensation coefficient to obtain the compensated oil fume concentration includes:

[0066] The above-mentioned oil fume concentration is compensated based on a preset concentration compensation coefficient using the following formula to obtain the compensated oil fume concentration:

[0067] ;

[0068] Wherein, k0 is the preset concentration compensation coefficient, ρ0 is the oil fume concentration, ρ is the compensated oil fume concentration, Q is the preset standard flow rate, and q is the oil fume flow rate.

[0069] This invention provides a control method for an oil fume concentration monitor, applied to the oil fume concentration monitor in Embodiment 1. The method includes: upon receiving a start signal, controlling the diaphragm air pump to compress air to generate a negative pressure difference in the sampling tube, drawing in the oil fume to be monitored from the sampling point; heating the oil fume to be monitored at a preset temperature using a heating device; detecting the oil fume flow rate of the oil fume to be monitored using a flow meter; determining whether the oil fume flow rate of the oil fume to be monitored is within a preset flow range; determining a first temperature of the heating device based on the relationship between the oil fume flow rate and the preset flow range, and the oil fume flow rate; and controlling the heating device to heat the oil fume to be monitored at the first temperature. This method determines the first temperature of the heating device by detecting the relationship between the oil fume flow rate and the preset flow range, and by determining a reasonable first temperature, thereby reducing the operating power consumption of the oil fume concentration monitor.

[0070] Furthermore, in the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0071] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

Claims

1. A fume concentration monitor, characterized in that, include: The system includes a controller, a diaphragm air pump, a flow meter, a filter element, a particle sensor, a heating device, and a sampling tube; the controller, the diaphragm air pump, the flow meter, the filter element, the particle sensor, the heating device, and the sampling tube are connected in sequence; sampling points are set at preset positions on the sampling tube; The sampling point is located inside the smoke exhaust duct; The controller is used to, upon receiving a start signal, control the diaphragm air pump to compress air to generate a negative pressure difference in the sampling tube, and draw in the oil fume to be monitored from the sampling point; The heating device is used to heat the oil fume to be monitored at a preset temperature. The filter element is used to filter the oil fume particles to be monitored. The flow meter is used to detect the flow rate of the oil fume to be monitored; The controller is also used to determine the flow rate of the oil fume to be monitored and a preset flow range; determine a first temperature of the heating device based on the relationship between the oil fume flow rate and the preset flow range and the oil fume flow rate; and control the heating device to heat the oil fume to be monitored at the first temperature. The particle sensor is used to detect the concentration of the oil fume to be monitored; The controller is further configured to determine the first temperature of the heating device as the preset temperature if the relationship between the oil fume flow rate and the preset flow range is that the oil fume flow rate is within the preset flow range. The controller is further configured to, if the relationship between the oil fume flow rate and the preset flow range is such that the oil fume flow rate is not within the preset flow range, determine the first temperature of the heating device based on the oil fume flow rate; wherein the first temperature of the heating device is determined based on the oil fume flow rate using the following formula: Where k is the preset temperature compensation coefficient, Q is the preset standard flow rate, q0 is the oil fume flow rate, T0 is the preset temperature, and T is the first temperature.

2. The oil fume concentration monitor according to claim 1, characterized in that, The controller is also used to determine whether the oil fume flow rate is greater than a preset threshold; if the oil fume flow rate is less than or equal to the preset threshold, control the issuance of a filter maintenance signal.

3. A control method for an oil fume concentration monitor, characterized in that, The oil fume concentration monitoring instrument according to any one of claims 1 to 2 includes: If a start signal is received, the diaphragm air pump is controlled to compress air to create a negative pressure difference in the sampling tube, and the oil fume to be monitored is drawn in from the sampling point. The heating device is used to heat the oil fume to be monitored at a preset temperature. The flow rate of the oil fume to be monitored is detected by the flow meter; Determine whether the flow rate of the oil fume to be monitored is within a preset flow rate range; A first temperature of the heating device is determined based on the relationship between the oil fume flow rate and the preset flow range, and the oil fume flow rate itself. Specifically, if the oil fume flow rate is within the preset flow range, the first temperature of the heating device is the preset temperature; if the oil fume flow rate is not within the preset flow range, the first temperature of the heating device is determined based on the oil fume flow rate. The first temperature of the heating device is determined based on the oil fume flow rate using the following formula: Where k is the preset temperature compensation coefficient, Q is the preset standard flow rate, q0 is the oil fume flow rate, T0 is the preset temperature, and T is the first temperature; The heating device is controlled to heat the oil fume to be monitored at the first temperature.

4. The control method for the oil fume concentration monitor according to claim 3, characterized in that, After the step of controlling the heating device to heat the oil fume to be monitored at the first temperature, the method further includes: Determine whether the oil fume flow rate is greater than a preset threshold; If not, the concentration of the oil fume to be monitored is detected by the particle sensor; the oil fume concentration is compensated based on a preset concentration compensation coefficient to obtain the compensated oil fume concentration, and the compensated oil fume concentration is controlled to be output.

5. The control method for the oil fume concentration monitor according to claim 4, characterized in that, The step of compensating the oil fume concentration based on a preset concentration compensation coefficient to obtain the compensated oil fume concentration includes: The oil fume concentration is compensated based on a preset concentration compensation coefficient using the following formula to obtain the compensated oil fume concentration: ； Wherein, k0 is the preset concentration compensation coefficient, ρ0 is the oil fume concentration, ρ is the compensated oil fume concentration, Q is the preset standard flow rate, and q is the oil fume flow rate.

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