JP2019171240A - Grease filter system and maintenance method of grease filter - Google Patents

Abstract

To provide a grease filter capable of efficiently trapping an oil content.SOLUTION: An exhaust duct exhausting air in a kitchen to the outside of the kitchen is provided in the kitchen. A range hood system for efficiently collecting air in the kitchen is provided at the opening of the kitchen side of the exhaust duct. A grease filter system 20 is provided in the range hood system. The grease filter system 20 includes: a grease filter 30 trapping an oil content from air containing the oil content; and a sensor unit 50 detecting sediments containing the oil content in the grease filter 30.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a grease filter system and a grease filter maintenance method.

  The kitchen is provided with an exhaust duct that discharges the air in the kitchen to the outside of the kitchen. The opening on the kitchen side of the exhaust duct is provided, for example, above the gas range. The opening is provided with a range hood for efficiently collecting air in the kitchen. The range hood may be provided with a grease filter. The grease filter captures oil from the air containing oil in the kitchen, and passes the air from which oil has been removed.

  Patent Document 1 discloses a technique for attaching a mark made of a nonflammable white inorganic material to the surface of a grease filter. The mark attached to the grease filter changes from white to black due to the adhesion of oil. According to the grease filter of Patent Document 1, it is possible to determine the replacement time of the grease filter by visually confirming the color of the mark.

Japanese Patent Laid-Open No. 11-128636

  However, in Patent Document 1, since the replacement time of the grease filter is determined by the subjectivity of a person who visually confirms the color of the mark, replacement of the grease filter may be delayed. If the replacement of the grease filter is delayed, the oil cannot be efficiently captured by the grease filter.

  In view of such a problem, an object of the present invention is to provide a grease filter system and a grease filter maintenance method that enable oil to be efficiently captured.

  In order to solve the above problems, a grease filter system of the present invention includes a grease filter that captures oil from air containing oil, and a sensor unit that detects deposits containing oil in the grease filter.

  Further, the grease filter may include a plurality of main body portions that are opposed to each other so as to be parallel to each other, capture oil from air containing oil, and a frame that maintains a predetermined distance between the plurality of main body portions. Good.

  The sensor unit may further include a deposition amount deriving unit that derives the capacitance between the plurality of main body units and derives the accumulation amount of the deposit for the plurality of main body units based on the derived capacitance. Good.

  In addition, the amount of deposits deposited by the UV lamp and the sensor unit disposed on either or both of the upstream and downstream sides of the grease filter and irradiating the grease filter with ultraviolet rays exceeds a predetermined threshold. In this case, a UV lamp control unit that starts UV irradiation to the UV lamp may be provided.

  Further, the UV lamp control unit may set the irradiation time of the ultraviolet rays from the UV lamp according to the derived deposition amount or threshold value.

  Moreover, you may provide the alerting | reporting part which alert | reports the accumulation amount of the deposit derived | led-out by the sensor part.

  Moreover, you may provide the filter for dust which is arrange | positioned in the upstream of the flow of air with respect to a grease filter, and captures dust from air.

  In order to solve the above problems, a grease filter maintenance method of the present invention includes a deposit amount acquisition step of acquiring a deposit amount of deposits containing oil in a grease filter that captures oil from air containing oil, and a deposit amount acquisition. An ultraviolet irradiation step of starting irradiation of ultraviolet rays with a UV lamp that irradiates the grease filter with ultraviolet rays when the accumulation amount acquired in the step exceeds a predetermined threshold value.

  In order to solve the above problems, a grease filter maintenance method of the present invention includes a deposit amount acquisition step of acquiring a deposit amount of deposits containing oil in a grease filter that captures oil from air containing oil, and a deposit amount acquisition. And a notification step of notifying that when the amount of deposition acquired in the step exceeds a predetermined threshold.

  According to the present invention, oil can be efficiently captured.

It is the schematic which shows the structure of the range hood system by 1st Embodiment. It is the schematic which shows the structure of a grease filter system. It is explanatory drawing explaining the detection of the accumulation amount of the deposit by a sensor part. It is a flowchart which shows the flow of the process which a UV lamp control part performs. It is the schematic which shows the structure of the grease filter system by 2nd Embodiment. It is a flowchart which shows the flow of the process which a alerting | reporting control part performs. It is the schematic which shows the structure of the grease filter system by 3rd Embodiment. It is explanatory drawing explaining the detection of the accumulation amount of the deposit by a sensor part. It is the schematic which shows the structure of the range hood system by a modification. It is the schematic which shows the structure of the grease filter system by a modification.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating the understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

(First embodiment)
FIG. 1 is a schematic diagram illustrating a configuration of a range hood system 1 according to the first embodiment. The range hood system 1 is installed in a kitchen. The kitchen is provided with an exhaust duct 2 for discharging the air inside the kitchen to the outside of the kitchen. The opening 3 on the kitchen side of the exhaust duct 2 is provided, for example, above the gas range.

  The range hood system 1 includes a hood case 10, a fan 12, and a grease filter system 20. The grease filter system 20 includes a grease filter 30, a UV lamp 40, a sensor unit 50, and a control unit 60. In FIG. 1, the hood case 10, the fan 12, the grease filter 30, the UV lamp 40, and the exhaust duct 2 near the kitchen-side opening 3 are shown in cross section.

  The food case 10 is formed in a box shape. The hood case 10 is provided so as to cover the vicinity of the opening 3 on the kitchen side of the exhaust duct 2. The food case 10 is provided with an opening 14 that allows the space in the food case 10 to communicate with the space in the kitchen. For this reason, the space in the kitchen and the space in the exhaust duct 2 communicate with each other through the space in the hood case 10.

  A grease filter 30 is attached in the hood case 10. The grease filter 30 captures oil from air containing oil. The grease filter 30 will be described later. Hereinafter, with respect to the grease filter 30, the kitchen side is referred to as the upstream side, and the exhaust duct 2 side is referred to as the downstream side.

  A fan 12 is provided on the downstream side of the grease filter 30. The fan 12 is driven by the motor 16 to suck the air in the kitchen into the hood case 10 and send it to the exhaust duct 2.

  Further, a UV lamp 40 and a reflection plate 42 are provided on the downstream side of the grease filter 30. For example, the UV lamp 40 is supported on the upper inner wall surface of the hood case 10. The UV lamp 40 irradiates the grease filter 30 with ultraviolet rays. The reflection plate 42 is disposed on the side opposite to the grease filter 30 when viewed from the UV lamp 40. The reflection plate 42 reflects the ultraviolet rays emitted from the UV lamp 40 and collects the ultraviolet rays on the grease filter 30.

  FIG. 2 is a schematic diagram showing the configuration of the grease filter system 20. In FIG. 2, the grease filter 30 is shown in cross section. In FIG. 2, the signal flow is indicated by broken arrows. The grease filter 30 includes a filter main body 32 and a frame body 34. The filter main body 32 includes a first main body 32a and a second main body 32b.

  The first main body portion 32a and the second main body portion 32b are each formed in a flat plate shape. The first main body portion 32a and the second main body portion 32b are made of, for example, metal and are formed in a mesh shape. The coarseness of the first body portion 32a and the coarseness of the second body portion 32b may be the same or different. The first main body portion 32a and the second main body portion 32b are arranged to face each other so as to be parallel to each other. For example, the first main body portion 32a is relatively disposed on the kitchen side, and the second main body portion 32b is relatively disposed on the exhaust duct 2 side.

  The first main body portion 32a and the second main body portion 32b are supported by the frame body 34 so that there is a predetermined interval between them. That is, the frame 34 maintains a predetermined interval between the plurality of main body portions. The frame body 34 is made of, for example, an insulator and is provided on the outer periphery of the first main body portion 32a and the second main body portion 32b. The frame body 34 is supported on the inner wall surface of the hood case 10.

  The filter main body 32 (the first main body 32a and the second main body 32b) captures the oil from the air containing the oil in the kitchen and allows the air from which the oil has been removed to pass through. For this reason, when the grease filter 30 is attached to the range hood system 1 and used, deposits containing oil accumulate on the filter main body 32 (the first main body 32a and the second main body 32b).

  The sensor unit 50 detects an accumulation amount of deposits including oil accumulated in the filter main body 32 (the first main body 32a and the second main body 32b). Here, the deposit deposited on the first main body portion 32a and the second main body portion 32b is deposited not only on the outer side surfaces of the first main body portion 32a and the second main body portion 32b but also on the inner side surfaces thereof. For this reason, when deposits are deposited on the filter main body 32, the capacitance between the first main body 32a and the second main body 32b depends on the amount of deposits (in other words, the deposition thickness). Change. Therefore, the sensor unit 50 measures the capacitance between the first body portion 32a and the second body portion 32b (capacitance of the filter body portion 32). Then, the sensor unit 50 derives the deposition amount of the deposit from the obtained capacitance.

  FIG. 3 is an explanatory diagram for explaining detection of the amount of deposit by the sensor unit 50. The filter main body 32 is a part to be measured which is a capacitance measurement target. For example, the sensor unit 50 derives the impedance of the filter main body 32 that is the measurement target portion by the automatic balance bridge method, and derives the capacitance based on the derived impedance.

  The sensor unit 50 includes an amplifier 51, a feedback resistor 52, a switch 53, an AC power supply 54, a first voltmeter 55, a second voltmeter 56, and a sensor control unit 57.

  The amplifier 51 is, for example, an operational amplifier. The non-inverting input terminal of the amplifier 51 is grounded. A feedback resistor 52 is connected between the inverting input terminal of the amplifier 51 and the output terminal of the amplifier 51.

  One main body (for example, the first main body 32 a) in the filter main body 32 is connected to a connection node N <b> 1 between the inverting input terminal of the amplifier 51 and the feedback resistor 52. On the other hand, the other body part (for example, the second body part 32 b) in the filter body part 32 is connected to one terminal of the switch 53. The other terminal of the switch 53 is connected to the AC power supply 54.

  The switch 53 is turned on / off by the sensor control unit 57. When the switch 53 is turned on, the AC power supply 54 is connected to the other main body (for example, the second main body 32b) in the filter main body 32, and a voltage is applied. The main body connected to the connection node N1 is not limited to the first main body 32a but may be the second main body 32b. In this case, the main body connected to the AC power supply 54 via the switch 53 may be the first main body 32a.

  The first voltmeter 55 measures the voltage of the main body (for example, the second main body 32b) to which the AC power supply 54 is connected. The second voltmeter 56 measures the voltage at the connection node N <b> 2 between the output terminal of the amplifier 51 and the feedback resistor 52.

  In the sensor unit 50, the gain of the amplifier 51 is automatically adjusted so that the connection node N1 between the inverting input terminal of the amplifier 51 and the feedback resistor 52 is virtually grounded.

  The sensor control unit 57 is configured by a semiconductor integrated circuit including a central processing unit, a ROM storing a program, a RAM as a work area, and the like. The sensor control unit 57 functions as a deposition amount deriving unit 58 by executing a program. The accumulation amount deriving unit 58 derives the capacitance of the filter main body 32 and derives the accumulation amount of the deposit based on the capacitance.

In FIG. 3, when the resistance value of the feedback resistor 52 is R, the voltage indicated by the first voltmeter is E1, and the voltage indicated by the second voltmeter is E2, the impedance Z of the filter body 32 is expressed by the following equation (1). Can be derived from
Z = R · E1 / E2 (1)

Further, when the angular frequency of the AC power supply 54 is ω and the capacitance of the filter main body 32 is C, the reactance X of the filter main body 32 is expressed by the following equation (2).
X = 1 / (ωC) (2)

  The accumulation amount deriving unit 58 assumes that the reactance component of the impedance Z derived from the equation (1) is equal to the reactance (1 / (ωC)) of the equation (2), and sets the capacitance C of the filter main body 32. To derive.

  Here, the sensor control unit 57 stores in advance a deposition amount table that is a table showing the relationship between the capacitance C of the filter main body 32 and the deposition amount of the deposit. This accumulation amount table is created in advance by an experiment or the like, for example. The accumulation amount deriving unit 58 derives the accumulation amount based on the derived capacitance C and the accumulation amount table.

  Returning to FIG. 2, the UV lamp 40 irradiates the grease filter 30 with ultraviolet rays in accordance with control by the control unit 60. When irradiated with ultraviolet rays, oxygen in the air is decomposed by the ultraviolet rays to generate ozone. Note that the UV lamp 40 emits ultraviolet rays having a wavelength at which ozone is easily generated. The generated ozone oxidizes and decomposes oil adhering to the filter main body 32.

  In addition, it is not restricted to the aspect which decomposes | disassembles the oil component of the filter main-body part 32 with ozone. For example, the oil content of the filter main body 32 may be decomposed by a photocatalytic reaction. In this embodiment, a photocatalyst such as titanium oxide is carried on the first main body portion 32a and the second main body portion 32b. For example, the surface of the first main body portion 32a and the second main body portion 32b is coated with a fluororesin mixed with titanium oxide. When the photocatalyst is irradiated with ultraviolet rays, electrons in the valence band of the photocatalyst are excited to the conduction band, and holes are generated in the valence band. In the photocatalytic reaction, the oil is oxidized and decomposed by these holes. In this case, the UV lamp 40 emits ultraviolet rays having a wavelength that facilitates the photocatalytic reaction.

  The control unit 60 is constituted by a semiconductor integrated circuit including a central processing unit, a ROM storing programs, a RAM as a work area, and the like. The control unit 60 functions as the UV lamp control unit 62 by executing a program. When the deposition amount detected by the sensor unit 50 exceeds a predetermined threshold, the UV lamp control unit 62 causes the UV lamp 40 to start irradiation with ultraviolet rays.

  FIG. 4 is a flowchart showing a flow of processing executed by the UV lamp control unit 62. FIG. 4 shows a maintenance method of the grease filter 30. The UV lamp control unit 62 executes a series of processes shown in FIG. 4 at predetermined time intervals. The predetermined interval can be arbitrarily set, for example, a daily interval or a weekly interval.

  First, the UV lamp control unit 62 performs a deposition amount acquisition process for acquiring a deposition amount of deposits deposited on the filter main body 32 (deposition amount acquisition step) (S100). Specifically, the UV lamp control unit 62 sends an accumulation amount derivation instruction for deriving the accumulation amount to the sensor control unit 57.

  When the accumulation amount deriving unit 58 of the sensor control unit 57 receives the accumulation amount deriving instruction, the accumulation amount deriving unit 58 turns on the switch 53 and applies the voltage of the AC power supply 54 to the filter main body unit 32. The accumulation amount deriving unit 58 obtains the voltage value indicated by the first voltmeter 55 and the second voltmeter 56 and derives the impedance Z and the capacitance of the filter main body 32. The deposition amount deriving unit 58 turns off the switch 53 after the capacitance is derived. Then, the deposition amount deriving unit 58 derives the deposition amount from the derived capacitance using the deposition amount table, and transmits the derived deposition amount to the UV lamp control unit 62. In this way, the UV lamp control unit 62 acquires the deposition amount.

  Next, the UV lamp control unit 62 determines whether or not the acquired accumulation amount is equal to or less than a predetermined threshold th (S110). The predetermined threshold th is preset by, for example, experiments. The predetermined threshold th may be provided with a plurality of candidates, and may be selected from the plurality of candidates.

  When the accumulation amount is equal to or less than the predetermined threshold th (YES in S110), the UV lamp control unit 62 ends a series of processes. On the other hand, when the deposition amount is not less than or equal to the predetermined threshold th, that is, when the deposition amount exceeds the predetermined threshold th (NO in S110), the UV lamp control unit 62 starts the UV lamp 40 to irradiate ultraviolet rays (ultraviolet irradiation step). (S120).

  Next, the UV lamp control unit 62 determines whether or not a predetermined time has elapsed since the start of ultraviolet irradiation (S130). The predetermined time corresponds to the irradiation time of ultraviolet rays. For example, the UV lamp control unit 62 sets a predetermined time according to the derived deposition amount. For example, the control unit 60 stores an irradiation time table, which is a table indicating the relationship between the amount of deposition and the irradiation time of ultraviolet rays, created in advance by experiments or the like. The UV lamp control unit 62 sets a predetermined time corresponding to the irradiation time based on the derived deposition amount and the irradiation time table. In addition, when it is possible to select from a plurality of candidates provided with the threshold th, the UV lamp control unit 62 may set a predetermined time according to the selected threshold th. For example, the predetermined time may be set shorter if the threshold th is relatively small, and may be set longer if the threshold th is relatively large.

  If the predetermined time has not elapsed (NO in S130), the UV lamp control unit 62 waits until the predetermined time elapses. On the other hand, when the predetermined time has elapsed (YES in S130), the UV lamp control unit 62 ends the irradiation of ultraviolet rays to the UV lamp 40 (S140), and ends a series of processes.

  As described above, in the grease filter system 20 of the first embodiment, the accumulation amount of the deposit including the oil component in the grease filter 30 is detected by the sensor unit 50. And in the grease filter system 20 of 1st Embodiment, when the deposit amount of a deposit exceeds a predetermined threshold value, irradiation of an ultraviolet-ray is started. That is, in the grease filter system 20 of the first embodiment, when the deposit amount of the deposit containing oil exceeds a predetermined amount, the oil component is decomposed by irradiation with ultraviolet rays, and the deposit amount of the deposit is reduced. As a result, the ability to capture oil in the grease filter 30 is restored.

  Therefore, according to the maintenance method of the grease filter system 20 and the grease filter 30 of the first embodiment, it becomes possible to capture oil efficiently.

  Further, in the grease filter system 20 of the first embodiment, since the accumulation amount of the deposit is detected by the sensor unit 50, the accumulation amount can be grasped more accurately than in the aspect in which the accumulation amount of the deposit is visually determined. be able to. As a result, according to the grease filter system 20 of the first embodiment, the treatment for the grease filter 30 such as irradiation of ultraviolet rays can be performed at a more appropriate timing.

  Further, in the grease filter system 20 of the first embodiment, since the amount of deposits does not increase rapidly in a short time, the amount of deposits is derived at a predetermined interval such as one day interval. That is, the application of voltage to the filter main body 32 accompanying the derivation of the deposition amount is intermittently performed. For this reason, in the grease filter system 20 of 1st Embodiment, power consumption can be restrained compared with deriving deposition amount frequently.

  In the grease filter system 20 of the first embodiment, the irradiation time of the UV lamp 40 is set according to the derived deposition amount or the threshold th. For this reason, in the grease filter system 20 of 1st Embodiment, the oil component of the filter main-body part 32 can be decomposed | disassembled efficiently.

  In the first embodiment, the UV lamp 40 is provided on the downstream side of the grease filter 30. However, when the oil component is decomposed by a photocatalytic reaction, the UV lamp 40 may be provided on the upstream side of the grease filter 30. Further, when the oil component is decomposed by the photocatalytic reaction, the UV lamps 40 may be provided on both the upstream side and the downstream side of the grease filter 30.

(Second Embodiment)
FIG. 5 is a schematic diagram showing the configuration of the grease filter system 120 according to the second embodiment. The grease filter system 120 according to the second embodiment is different from the grease filter system 20 according to the first embodiment in that a notification unit 70 is provided instead of the UV lamp 40. Moreover, the control part 60 of the grease filter system 120 functions as the alerting | reporting control part 162 by running a program.

  The notification unit 70 is, for example, a speaker that emits sound. The notification unit 70 notifies the accumulation amount detected by the sensor unit 50 by sound. Note that the notification unit 70 is not limited to a speaker, and may be, for example, an LED lamp that notifies the accumulation amount by light.

  FIG. 6 is a flowchart showing a flow of processing executed by the notification control unit 162. FIG. 6 shows a maintenance method of the grease filter 30. The notification control unit 162 executes a series of processes shown in FIG. 6 at predetermined time intervals such as one day intervals.

  The notification control unit 162 performs a deposition amount acquisition process (deposition amount acquisition step) (S100), and determines whether or not the deposition amount is equal to or less than the threshold th (S110). These are the same as steps S100 and S110 executed by the UV lamp control unit 62 of the first embodiment. When the accumulation amount is equal to or less than the threshold th (YES in S110), the notification control unit 162 ends the series of processes.

  On the other hand, when the accumulation amount is not equal to or less than the threshold th (NO in S110), the notification control unit 162 causes the notification unit 70 to notify that the accumulation amount exceeds the threshold th (notification step) (S220). . For example, the notification control unit 162 causes a speaker that is the notification unit 70 to emit a predetermined sound.

  Although omitted in FIG. 6, the notification control unit 162 may end the notification after a predetermined time has elapsed from the start of the notification, or may end the notification in response to pressing of a reset button (not shown). .

  As described above, the grease filter system 120 of the second embodiment is notified when the amount of deposit exceeds a predetermined threshold. Thereby, in the grease filter system 120 of 2nd Embodiment, the accumulation amount can be grasped | ascertained more reliably and replacement | exchange, cleaning, etc. of a grease filter can be performed reliably.

  Therefore, according to the maintenance method of the grease filter system 120 and the grease filter 30 of the second embodiment, it becomes possible to capture oil efficiently.

  In the second embodiment, the threshold th that is a criterion for determining the amount of deposition may be set at a plurality of levels. And the alerting | reporting control part 162 may vary alerting | reporting content according to the level of the threshold value th which the accumulation amount exceeded. For example, the notification control unit 162 may vary the pitch, timbre, phrase, and the like of sound output from a speaker that is the notification unit 70.

  Moreover, you may combine 1st Embodiment and 2nd Embodiment. For example, when the deposition amount exceeds the threshold th, the UV lamp control unit 62 may cause the UV lamp 40 to start irradiating ultraviolet rays, and the notification control unit 162 may cause the notification unit 70 to start notification. In this aspect, it can be grasped that the irradiation of ultraviolet rays has started.

(Third embodiment)
FIG. 7 is a schematic diagram showing the configuration of the grease filter system 220 according to the third embodiment. The grease filter system 220 according to the third embodiment is different from the grease filter system 120 according to the second embodiment in that a grease filter 230 is provided instead of the grease filter 30 and a sensor unit 250 is provided instead of the sensor unit 50. The grease filter 230 is different from the grease filter 30 in that it has a filter main body 232 instead of the filter main body 32.

  The filter main body 232 is different from the filter main body 32 in that it includes a third main body 32c in addition to the first main body 32a and the second main body 32b. That is, the filter main body 232 includes three main bodies. The 3rd main-body part 32c is formed in flat form and mesh shape. The third main body portion 32c is opposed to the second main body portion 32b so as to be parallel to the second main body portion 32b on the side opposite to the first main body portion 32a. The third main body portion 32c is supported by the frame body 34 so as to have a predetermined distance from the second main body portion 32b.

  FIG. 8 is an explanatory diagram for explaining detection of the amount of deposit by the sensor unit 250. The sensor unit 250 is different from the sensor unit 50 in that it includes selection switches 59a and 59b. The selection switch 59a switches the connection between each main body (the first main body 32a, the second main body 32b, and the third main body 32c) of the filter main body 232 and the connection node N1. The selection switch 59 b switches the connection between the switch 53 and each main body (the first main body 32 a, the second main body 32 b, and the third main body 32 c) of the filter main body 232. The selection switches 59a and 59b are switched by the sensor control unit 57.

  When the accumulation amount deriving unit 58 of the third embodiment receives the accumulation amount deriving instruction, the accumulation amount deriving unit 58 derives the capacitance of the filter main body 232 between the main bodies.

  For example, the deposition amount deriving unit 58 connects the connection node N1 to the first main body 32a by the selection switch 59a, and connects the switch 53 to the second main body 32b by the selection switch 59b. Next, the deposition amount deriving unit 58 turns on the switch 53 to apply a voltage to the second main body unit 32b, and obtains a voltage value indicated by the first voltmeter 55 and the second voltmeter 56. Then, the deposition amount deriving unit 58 derives the impedance Z and the capacitance of the capacitive element composed of the first main body 32a and the second main body 32b. The accumulation amount deriving unit 58 turns off the switch 53 after deriving the capacitance between the first main body 32a and the second main body 32b.

  Next, the deposition amount deriving unit 58 connects the connection node N1 to the second main body 32b by the selection switch 59a, and connects the switch 53 to the third main body 32c by the selection switch 59b. Next, the deposition amount deriving unit 58 turns on the switch 53 to apply a voltage to the second main body unit 32b, and obtains a voltage value indicated by the first voltmeter 55 and the second voltmeter 56. Then, the deposition amount deriving unit 58 derives the impedance Z and the capacitance of the capacitive element composed of the second main body 32b and the third main body 32c. The accumulation amount deriving unit 58 turns off the switch 53 after deriving the capacitance between the second main body 32b and the third main body 32c.

  Next, the deposition amount deriving unit 58 uses the accumulation amount table to determine the deposition amount for the first body portion 32a and the second body portion 32b from the capacitance between the first body portion 32a and the second body portion 32b. Deriving the quantity. Further, the accumulation amount deriving unit 58 uses the accumulation amount table to calculate the accumulation amount for the second main body portion 32b and the third main body portion 32c from the capacitance between the second main body portion 32b and the third main body portion 32c. Is derived.

  Returning to FIG. 7, the notification control unit 162 of the third embodiment includes the accumulation amount for the first main body portion 32a and the second main body portion 32b, and the accumulation amount for the second main body portion 32b and the third main body portion 32c. For each of the above, it is determined whether or not the accumulation amount is equal to or less than the threshold th.

  When the accumulation amount for the first main body portion 32a and the second main body portion 32b is not equal to or less than the threshold th, the notification control unit 162 has the accumulation amount for the first main body portion 32a and the second main body portion 32b exceeding the threshold th. The notification unit 70 is notified to that effect. Further, when the accumulation amount for the second main body portion 32b and the third main body portion 32c is not equal to or less than the threshold th, the notification control unit 162 causes the accumulation amount for the second main body portion 32b and the third main body portion 32c to exceed the threshold th. The notification unit 70 is notified of the fact that the notification is being made. Further, the notification control unit 162, when both the accumulation amount for the first main body portion 32a and the second main body portion 32b and the accumulation amount for the second main body portion 32b and the third main body portion 32c are not less than the threshold th, The notification unit 70 is notified that the accumulation amount for all of the first main body portion 32a, the second main body portion 32b, and the third main body portion 32c exceeds the threshold th.

  The accumulation amount deriving unit 58 is based on the capacitance between the first body portion 32a and the second body portion 32b and the capacitance between the second body portion 32b and the third body portion 32c. You may derive | lead-out the synthetic capacitance (the synthetic capacitance of the filter main-body part 232 whole) between the 1st main-body part 32a and the 3rd main-body part 32c. In this case, the accumulation amount deriving unit 58 estimates the accumulation amount for the entire filter main body 232 from the combined capacitance. And when the accumulation amount about the whole filter main-body part 232 is not the threshold value th or less, the alerting | reporting control part 162 may alert | report the fact to that effect.

  Further, the accumulation amount deriving unit 58 derives the electrostatic capacitance between the first main body portion 32a and the third main body portion 32c and the electrostatic capacitance between the first main body portion 32a and the second main body portion 32b. Then, the capacitance between the second main body portion 32b and the third main body portion 32c may be derived from these capacitances. The accumulation amount deriving unit 58 derives the capacitance between the first main body 32a and the third main body 32c and the capacitance between the second main body 32b and the third main body 32c. And you may derive | lead-out the electrostatic capacitance between the 1st main-body part 32a and the 2nd main-body part 32b from these electrostatic capacitances.

  As described above, in the grease filter system 220 according to the third embodiment, the filter main body 232 includes three main bodies, and the capacitance of the filter main body 232 is derived between the main bodies. . For this reason, in the grease filter system 220 of 3rd Embodiment, the main body part with much accumulation amount can be pinpointed and can be alert | reported among the some main body parts which comprise the filter main body part 232. As a result, in the grease filter system 220 of the third embodiment, replacement and cleaning of the grease filter 230 can be performed only on the main body having a large accumulation amount.

  Therefore, according to the maintenance method of the grease filter system 220 and the grease filter 230 of the third embodiment, it becomes possible to capture oil efficiently.

  In the third embodiment, the filter main body 232 is composed of three main bodies. However, the filter main body 232 is not limited to an aspect configured by three main bodies, and may be configured by four or more main bodies.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to this embodiment. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  For example, in each of the above-described embodiments, the deposit amount is derived based on the capacitance of the filter main body portions 32 and 232. However, the sensor units 50 and 250 are not limited to a mode in which the accumulation amount of the deposit is derived based on the capacitance of the filter main body units 32 and 232. For example, the sensor units 50 and 250 may derive the deposit amount based on the resistance values of the filter main body units 32 and 232. This is because the resistance values of the filter main body portions 32 and 232 change according to the amount of deposits.

  For example, the sensor units 50 and 250 apply a voltage to both ends of the first body part 32a, and derive a resistance value of the first body part 32a from the applied voltage and a current flowing through the first body part 32a. And the sensor parts 50 and 250 are based on the table | surface which shows the relationship between the resistance value of the 1st main-body part 32a and the deposition amount of a deposit, and the derived | led-out resistance value, Derived the amount of deposition.

  In addition, the sensor units 50 and 250 may derive the amount of deposits based on, for example, changes in the frequency of the filter main body portions 32 and 232, or the deposits deposited on the filter main body portions 32 and 232. The amount of deposits may be derived based on chemical changes to the oil content.

  In addition to the oil, dust may accumulate on the filter main bodies 32 and 232. If a large amount of dust accumulates on the filter main bodies 32 and 232, the estimation accuracy of the accumulation amount derived from the capacitance may be reduced. Therefore, as shown in FIG. 9, a dust filter 80 that captures dust from the air may be provided on the upstream side of the air flow with respect to the grease filter 30 (filter body portion 32). In this aspect, dust and oil contained in the air are captured separately, and accumulation of dust on the grease filter 30 is suppressed. For this reason, according to this aspect, it is possible to improve the estimation accuracy of the accumulated amount of oil.

  FIG. 10 is a schematic diagram showing the configuration of a grease filter system 320 according to a modification. The grease filter 330 of the grease filter system 320 includes a filter main body portion 332 including one main body portion (first main body portion 32a), and a metal plate-shaped protection portion 36 that protects the filter main body portion 332. Consists of. The protection part 36 is provided on both the front surface and the back surface of the filter main body part 332. The protection part 36 is supported by the frame body 34 so as to have a predetermined distance from the filter main body part 332. The protection part 36 is provided with a through hole through which air can pass.

  The accumulation amount deriving unit 58 of the sensor unit 50 in FIG. 10 derives the capacitance between the front-side protection unit 36 and the first main body 32a, and derives the accumulation amount for the first main body 32a. . In addition, the accumulation amount deriving unit 58 may derive the accumulation amount for the first main body portion 32a by deriving the electrostatic capacitance between the protection unit 36 on the back surface side and the first main body portion 32a.

  According to this aspect, the filter main body 332 can be prevented from being damaged, and even if the filter main body 332 is composed of one main body (the first main body 32a), Capacitance and deposition amount can be derived. In addition, the filter main body part 332 protected by the protection part 36 is not limited to an aspect configured from one main body part, and may be configured from a plurality of main body parts. Moreover, the protection part 36 is not restricted to the aspect provided in both the surface of the filter main-body part 332, and a back surface. That is, the protection part 36 may be provided on either or both of the outermost surface and the outermost surface with respect to the filter main body part 332.

  The present invention can be used for a grease filter system and a grease filter maintenance method.

20, 220, 320 Grease filter system 30, 230, 330 Grease filter 32, 232, 332 Filter body part 32a First body part 32b Second body part 34 Frame body 40 UV lamp 50, 250 Sensor part 58 Accumulated amount deriving part 60 Control unit 62 UV lamp control unit 70 Notification unit 80 Dust filter 162 Notification control unit

Claims (9)

A grease filter that captures oil from air containing oil; and
A sensor unit for detecting deposits containing oil in the grease filter;
A grease filter system comprising: The grease filter is
A plurality of main body parts that are arranged to face each other so as to be parallel to each other and capture oil from air containing oil,
A frame that maintains a predetermined distance between the plurality of main body portions;
A grease filter system according to claim 1.   The sensor unit includes a deposition amount deriving unit that derives an electrostatic capacitance between the plurality of main body units and derives an accumulation amount of the deposit for the plurality of main body units based on the derived electrostatic capacitance. The grease filter system according to claim 2. A UV lamp that is disposed on either or both of the upstream side and the downstream side of the grease filter, and irradiates the grease filter with ultraviolet rays;
A UV lamp control unit that starts irradiation of ultraviolet rays to the UV lamp when the amount of deposits derived by the sensor unit exceeds a predetermined threshold;
The grease filter system according to any one of claims 1 to 3, further comprising:   The grease filter system according to claim 4, wherein the UV lamp control unit sets an irradiation time of ultraviolet rays from the UV lamp according to the derived deposition amount or the threshold value.   The grease filter system according to any one of claims 1 to 5, further comprising a notification unit configured to notify a deposition amount of the deposit derived by the sensor unit.   The grease filter system according to claim 1, further comprising a dust filter that is disposed on the upstream side of the air flow with respect to the grease filter and captures dust from the air. A deposit amount acquisition step of acquiring a deposit amount of deposits containing oil in a grease filter that captures oil from air containing oil; and
An ultraviolet irradiation step of starting irradiation of ultraviolet rays to a UV lamp that irradiates the grease filter with ultraviolet rays when the accumulation amount acquired in the accumulation amount acquisition step exceeds a predetermined threshold;
The maintenance method of the grease filter provided with. A deposit amount acquisition step of acquiring a deposit amount of deposits containing oil in a grease filter that captures oil from air containing oil; and
When the accumulation amount acquired in the accumulation amount acquisition step exceeds a predetermined threshold, a notification step for notifying that effect,
The maintenance method of the grease filter provided with.

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