Detection device and air cleaner

Abstract

To provide a detection device and an air cleaner capable of suppressing replacement of a sensor.SOLUTION: A detection device includes a plurality of sensors that respectively output a plurality of output values, a timer unit that counts time, and a determination unit that performs determination on the basis of the plurality of output values and the time.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a detection device and an air purifier. [Background technology]

[0002] Patent Document 1 discloses an odor detection system. In this odor detection system, odor components contained in a gas to be measured and their concentrations are identified based on the output values ​​of multiple odor sensors. Furthermore, the type of odor is determined based on the identified odor components and their concentrations. Examples of odor types include the three major body odors: body odor due to aging, middle-aged oily odor, and sweat odor (paragraphs 0018, 0033, and 0035). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2019 / 102654 Summary of the Invention [Problem to be solved by the invention]

[0004] In the odor detection system disclosed in Patent Document 1, the multiple odor sensors deteriorate over time, causing the output values ​​of the multiple odor sensors to change. As a result, if a long period of time passes, there is a possibility that the type of odor will be incorrectly identified. For this reason, if a long period of time passes, the multiple odor sensors must be replaced.

[0005] In view of this problem, an aspect of the present disclosure provides a detection device and an air purifier that can reduce the need to replace the sensor, for example. [Means for solving the problem]

[0006] A detection device according to a first aspect of the present disclosure includes a plurality of sensors that each output a plurality of output values, a timer that keeps time, and a judgment unit that makes a judgment based on the plurality of output values ​​and the time.

[0007] An air purifier according to a second aspect of the present disclosure includes an air purification unit that purifies air, a detection device according to the first aspect of the present disclosure, and a control unit that controls the air purification unit based on the determination, wherein the multiple output values ​​each indicate the amount of a plurality of different components, and the plurality of components are a plurality of odor components. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a block diagram of a detection device according to a first embodiment. [Figure 2] 3 is a diagram showing a data structure of a database referenced by a determination unit provided in the detection device of the first embodiment. FIG. [Figure 3] 10 is a table showing an example of the contents of a database referenced by a determination unit provided in a detection device of a reference example. [Figure 4] This is a table showing examples of the types of odors detected by the reference example detection device immediately after the device is manufactured, and the multiple output values ​​output by the multiple sensors provided in the detection device at that time. [Figure 5] This is a table showing examples of the types of odors detected by the reference example detection device two years after the device was manufactured, and the multiple output values ​​output by the multiple sensors provided in the detection device at that time. [Figure 6] 4 is a table showing an example of the contents of a database referenced by a determination unit provided in the detection device of the first embodiment. [Figure 7]This is a table showing an example of the types of odors detected by the detection device of the first embodiment immediately after the detection device is manufactured, the multiple output values ​​output by the multiple sensors provided in the detection device at that time, and the time kept by the timing unit provided in the detection device at that time. [Figure 8] This is a table showing an example of the types of odors detected by the detection device of the first embodiment two years after the device was manufactured, the multiple output values ​​output by the multiple sensors provided in the detection device at that time, and the time kept by the timing unit provided in the detection device at that time. [Figure 9] 4 is a flowchart showing the flow of processing performed by the detection device of the first embodiment. [Figure 10] FIG. 10 is a block diagram of a detection device according to a second embodiment. [Figure 11] 10 is a diagram showing a data structure of a database referenced by a determination unit provided in the detection device of the second embodiment. FIG. [Figure 12] 10 is a table showing an example of the contents of a database referenced by a determination unit provided in the detection device of the second embodiment. [Figure 13] This is a table showing examples of the types of odors detected by the detection device of the second embodiment immediately after the device is manufactured, the multiple output values ​​output by the multiple sensors provided in the detection device at that time, the time measured by the timing unit provided in the detection device at that time, and the temperature value output by the output unit provided in the detection device at that time. [Figure 14] This is a table showing examples of the types of odors detected by the detection device of the second embodiment two years after the device was manufactured, the multiple output values ​​output by the multiple sensors provided in the detection device at that time, the time measured by the timing unit provided in the detection device at that time, and the temperature value output by the output unit provided in the detection device at that time. [Figure 15] 10 is a flowchart showing the flow of processing performed by the detection device of the second embodiment. [Figure 16] FIG. 10 is a cross-sectional view schematically illustrating an air purifier according to a third embodiment. [Figure 17] 10 is a flowchart showing the flow of processing performed by the air purifier of the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the drawings, the same or equivalent elements are designated by the same reference numerals, and redundant description will be omitted.

[0010] 1. First embodiment 1.1 Detection equipment FIG. 1 is a block diagram of a detection device according to the first embodiment.

[0011] The detection device 1 of the first embodiment shown in FIG. 1 includes a plurality of sensors 11A, 11B, and 11C, a timer unit 12, and a determination unit .

[0012] Each of the multiple sensors 11A, 11B, and 11C detects a detection target and outputs an output value indicating the detection result. Therefore, the multiple sensors 11A, 11B, and 11C output multiple output values ​​OVA, OVB, and OVC, respectively. The sensors 11A, 11B, and 11C have different detection structures. For example, the sensors 11A, 11B, and 11C are made of different materials. Therefore, the detection targets detected by the sensors 11A, 11B, and 11C are different from each other. Furthermore, the detection characteristics of the sensors 11A, 11B, and 11C are different from each other.

[0013] The timer unit 12 counts the time TIME. The timer unit 12 is composed of a microcontroller and peripheral circuits.

[0014] The determination unit 14 performs a determination based on the output values ​​OVA, OVB, and OVC and the time TIME, and outputs a determination result JRi. The determination unit 14 prevents the determination result JRi from changing due to changes in the output values ​​OVA, OVB, and OVC caused by deterioration of the sensors 11A, 11B, and 11C. This prevents the need to replace the sensors 11A, 11B, and 11C. For example, it is possible to extend the period until the sensors 11A, 11B, and 11C must be replaced, or to eliminate the need to replace the sensors 11A, 11B, and 11C. The determination unit 14 maintains a database DB and performs a determination by referring to the maintained database DB. The determination unit 14 is composed of a microcontroller and peripheral circuits.

[0015] The microcontroller includes a real-time clock, a processor, and a memory. The processor executes a program stored in the memory to cause the microcontroller and peripheral circuits to operate as the timekeeping unit 12 and the determination unit 14. All or part of the processing performed by executing the program may be performed by hardware such as an electronic circuit.

[0016] 1.2 Database FIG. 2 is a diagram showing the data structure of a database referenced by a determination unit provided in the detection device of the first embodiment.

[0017] As shown in FIG. 2, the database DB associates a judgment result with each of two or more value groups GV1, GV2,...,Gi,...,GVn-1,GVn. Therefore, the database DB associates two or more judgment results JR1, JR2,...,JRi,...,JRn-1,JRn with each of two or more value groups GV1, GV2,...,Gi,...,GVn-1,GVn. Each of the value groups GV1, GV2,...,Gi,...,GVn-1,GVn includes a plurality of first comparison values ​​OVAC, OVBC, and OVCC, which are compared with a plurality of output values ​​OVA, OVB, and OVC, respectively, and a second comparison value TIMEC, which is compared with time TIME. Each of the first comparison values ​​OVAC, OVBC, and OVCC may be a single value or a plurality of values. The plurality of values ​​may be represented by a range of values.

[0018] The judgment unit 14 outputs a judgment result JRi associated with the value group GVi when the value groups GV1, GV2, . . . , Gi, . . . , GVn-1, GVn include the output values ​​OVA, OVB, and OVC corresponding to the first comparison values ​​OVAC, OVBC, and OVCC included in the value group GVi, respectively, and include the time TIME at which the second comparison value TIMEC included in the value group GVi is recorded. As a result, the judgment unit 14 outputs a judgment result JRi associated with the value group GVi, which includes the output values ​​OVA, OVB, and OVC and the time TIME in the database DB. As a result, the judgment unit 14 makes a judgment based on the output values ​​OVA, OVB, and OVC and the time TIME, and outputs the judgment result JRi.

[0019] 1.3 Detection target and output value The detection targets detected by the multiple sensors 11A, 11B, and 11C are, for example, multiple different components contained in the target object. The multiple output values ​​OVA, OVB, and OVC indicate, for example, the amounts of the multiple components, respectively. The components detected by each of the sensors 11A, 11B, and 11C may be one substance or multiple substances.

[0020] The detection device 1 determines the types of air quality, water quality, taste, etc. Air quality includes odor, color, dust, etc.

[0021] When the detection device 1 detects air quality, water quality, or taste type, the sensors 11A, 11B, and 11C are air quality sensors, water quality sensors, or taste sensors, respectively. When the detection device 1 determines odor, color, or dust type, the sensors 11A, 11B, and 11C are odor sensors, color sensors, or dust sensors, respectively.

[0022] When sensors 11A, 11B, and 11C are odor sensors, sensors 11A, 11B, and 11C include multiple types of odor sensors, such as an odor sensor that mainly detects alcohol-based odor components, an odor sensor that mainly detects ammonia-based odor components, an odor sensor that mainly detects hydrogen-based components, an odor sensor that mainly detects acid-based components, etc. Furthermore, the multiple types of components include multiple types of odor components, such as alcohol-based odor components, ammonia-based odor components, hydrogen-based odor components, and acid-based odor components.

[0023] When the sensors 11A, 11B, and 11C are water quality sensors, the sensors 11A, 11B, and 11C include multiple types of water quality sensors, such as a water quality sensor that mainly detects organic solvents, a water quality sensor that mainly detects acids, a water quality sensor that mainly detects alkalis, etc. Furthermore, the multiple types of components include multiple types of water quality components, such as organic solvents, acids, and alkalis.

[0024] 1.4 Example of a database when a detection device detects different odor types FIG. 3 is a table showing an example of the contents of a database referred to by a determination unit provided in a detection device of the reference example.

[0025] In the detection device of the reference example, as shown in Figure 3, the database associates a determination result indicating that the type of odor is an apple scent with a value group consisting of the first comparison value OVAC "10," the first comparison value OVBC "20," and the first comparison value OVCC "30." The database also associates a determination result indicating that the type of odor is a mandarin orange scent with a value group consisting of the first comparison value OVAC "20," the first comparison value OVBC "10," and the first comparison value OVCC "30."

[0026] FIG. 4 is a table showing examples of the types of odors detected by the reference example detection device immediately after the device is manufactured, and examples of multiple output values ​​output by the multiple sensors provided in the detection device at that time.

[0027] 4, immediately after the detection device of the reference example is manufactured, if the multiple sensors respectively output an output value OVA of "10," an output value OVB of "20," and an output value OVC of "30" in response to the apple scent, the output value OVA of "10," the output value OVB of "20," and the output value OVC of "30" will match the first comparison value OVAC of "10," the first comparison value OVBC of "20," and the first comparison value OVCC of "30," respectively. Therefore, the determination unit outputs a determination result indicating that the type of odor is an apple scent, which is associated with the value group consisting of the first comparison value OVAC of "10," the first comparison value OVBC of "20," and the first comparison value OVCC of "30." Furthermore, if multiple sensors respond to the mandarin orange scent and output an output value OVA of "20," an output value OVB of "10," and an output value OVC of "30," respectively, the output value OVA of "20," the output value OVB of "10," and the output value OVC of "30" will match the first comparison value OVAC of "20," the first comparison value OVBC of "10," and the first comparison value OVCC of "30," respectively. Therefore, the determination unit outputs a determination result that indicates that the type of odor is a mandarin orange scent, which is associated with the value group consisting of the first comparison value OVAC of "20," the first comparison value OVBC of "10," and the first comparison value OVCC of "30."

[0028] FIG. 5 is a table showing examples of the types of odors detected by the reference example detection device two years after the device was manufactured, and the output values ​​output by the sensors included in the detection device at that time.

[0029] 5, if two years have passed since the manufacture of the detection device of the reference example, and multiple sensors have responded to the apple scent with an output value OVA of "9," an output value OVB of "16," and an output value OVC of "21," respectively, the output value OVA of "9," the output value OVB of "16," and the output value OVC of "21" do not match the first comparison value OVAC of "10," the first comparison value OVBC of "20," and the first comparison value OVCC of "30," respectively. Therefore, the determination unit cannot output a determination result indicating that the type of odor is an apple scent, which is associated with the value group consisting of the first comparison value OVAC of "10," the first comparison value OVBC of "20," and the first comparison value OVCC of "30." Furthermore, if multiple sensors respond to the mandarin orange scent and output an output value OVA of "18," an output value OVB of "8," and an output value OVC of "21," respectively, the output value OVA of "18," the output value OVB of "8," and the output value OVC of "21" do not match the first comparison value OVAC of "20," the first comparison value OVBC of "10," and the first comparison value OVCC of "30," respectively. Therefore, the determination unit cannot output a determination result indicating that the type of odor is a mandarin orange scent, which is associated with the value group consisting of the first comparison value OVAC of "20," the first comparison value OVBC of "10," and the first comparison value OVCC of "30."

[0030] In this way, in the detection device of the reference example, the output values ​​OVA, OVB, and OVC output in response to the scent of apple change from "10," "20," and "30" to "9," "16," and "21," making it impossible to output a determination result indicating that the type of odor is an apple scent. Similarly, the output values ​​OVA, OVB, and OVC output in response to the scent of mandarin orange change from "20," "10," and "30" to "18," "8," and "21," making it impossible to output a determination result indicating that the type of odor is a mandarin orange scent. For this reason, the sensors of the detection device of the reference example must be replaced if two years have passed since its manufacture.

[0031] FIG. 6 is a table showing an example of the contents of a database referred to by the determining unit provided in the detection device of the first embodiment.

[0032] In the detection device 1 of the first embodiment, as shown in FIG. 6, the database DB associates a determination result indicating that the type of odor is an apple scent with a group of values ​​consisting of the first comparison value OVAC of "10," the first comparison value OVBC of "20," the first comparison value OVCC of "30," and the second comparison value TIMEC of "0," and associates a determination result indicating that the type of odor is an apple scent with a group of values ​​consisting of the first comparison value OVAC of "9," the first comparison value OVBC of "16," the first comparison value OVCC of "21," and the second comparison value TIMEC of "17520." In addition, the database DB associates a determination result indicating that the type of odor is a mandarin orange scent with a group of values ​​consisting of the first comparison value OVAC "20", the first comparison value OVBC "10", the first comparison value OVCC "30", and the second comparison value TIMEC "0", and associates a determination result indicating that the type of odor is a mandarin orange scent with a group of values ​​consisting of the first comparison value OVAC "18", the first comparison value OVBC "8", the first comparison value OVCC "21", and the second comparison value TIMEC "17520".

[0033] FIG. 7 is a table showing an example of the types of odors detected by the detection device of the first embodiment immediately after the device is manufactured, the multiple output values ​​output by the multiple sensors provided in the detection device at that time, and the time measured by the timer provided in the detection device at that time.

[0034] As shown in Figure 7, immediately after the detection device 1 of the first embodiment is manufactured, sensors 11A, 11B, and 11C respond to the scent of apples and output an output value OVA of "10," an output value OVB of "20," and an output value OVC of "30," respectively, and when the timer unit 12 is ticking the time TIME of "0," the output value OVA of "10," the output value OVB of "20," the output value OVC of "30," and the time TIME of "0" match the first comparison value OVAC of "10," the first comparison value OVBC of "20," the first comparison value OVCC of "30," and the second comparison value TIMEC of "0," respectively. Therefore, the determination unit 14 outputs a determination result indicating that the type of odor is apple, which is associated with a value group consisting of the first comparison value OVAC of "10," the first comparison value OVBC of "20," the first comparison value OVCC of "30," and the second comparison value TIMEC of "0." Furthermore, when sensors 11A, 11B, and 11C respond to the mandarin orange scent and output an output value OVA of "20," an output value OVB of "10," and an output value OVC of "30," respectively, and the timer unit 12 is counting down the time TIME of "0," the output value OVA of "20," the output value OVB of "10," the output value OVC of "30," and the time TIME of "0" match the first comparison value OVAC of "20," the first comparison value OVBC of "10," the first comparison value OVCC of "30," and the second comparison value TIMEC of "0," respectively. Therefore, the judgment unit 14 outputs a judgment result indicating that the type of odor is a mandarin orange scent, which is associated with a group of values ​​consisting of the first comparison value OVAC being "20," the first comparison value OVBC being "10," the first comparison value OVCC being "30," and the second comparison value TIMEC being "0."

[0035] FIG. 8 is a table showing an example of the types of odors detected by the detection device of the first embodiment two years after the device was manufactured, the multiple output values ​​output by the multiple sensors provided in the detection device at that time, and the time kept by the timer provided in the detection device at that time.

[0036] As shown in Figure 8, two years after the detection device 1 of the first embodiment is manufactured, when sensors 11A, 11B, and 11C respond to the scent of apples and output an output value OVA of "9," an output value OVB of "16," and an output value OVC of "21," respectively, and the timer unit 12 is counting down the time TIME of "17520," the output value OVA of "9," the output value OVB of "16," the output value OVC of "21," and the time TIME of "17520" match the first comparison value OVAC of "9," the first comparison value OVBC of "16," the first comparison value OVCC of "21," and the second comparison value TIMEC of "17520," respectively. Therefore, the judgment unit 14 outputs a judgment result indicating that the type of odor is an apple scent, which is associated with a value group consisting of the first comparison value OVAC of "9," the first comparison value OVBC of "16," the first comparison value OVCC of "21," and the second comparison value TIMEC of "17520." Furthermore, when sensors 11A, 11B, and 11C react to the scent of mandarin oranges and output an output value OVA of "18," an output value OVB of "8," and an output value OVC of "21," respectively, and the timer unit 12 is counting down the time TIME of "17520," the output value OVA of "18," the output value OVB of "8," the output value OVC of "21," and the time TIME of "17520" match the first comparison value OVAC of "18," the first comparison value OVBC of "8," the first comparison value OVCC of "21," and the second comparison value TIMEC of "17520," respectively. Therefore, the judgment unit 14 outputs a judgment result indicating that the type of odor is a mandarin orange scent, which is associated with a value group consisting of the first comparison value OVAC of "18," the first comparison value OVBC of "8," the first comparison value OVCC of "21," and the second comparison value TIMEC of "17520."

[0037] In this way, the detection device 1 of the first embodiment can output a determination result indicating that the odor type is an apple odor even when the output values ​​OVA, OVB, and OVC output in response to the apple odor change from "10," "20," and "30" to "9," "16," and "21." Furthermore, the detection device 1 of the first embodiment can output a determination result indicating that the odor type is a mandarin odor even when the output values ​​OVA, OVB, and OVC output in response to the mandarin odor change from "20," "10," and "30" to "18," "8," and "21." Therefore, even if two years have passed since the detection device 1 of the first embodiment was manufactured, sensors 11A, 11B, and 11C do not need to be replaced.

[0038] In this way, by referring to the database DB that takes into account the degree of deterioration of the sensors 11A, 11B, and 11C, it is possible to prevent the need to replace the sensors 11A, 11B, and 11C. This effect is particularly noticeable when the time-dependent changes in the output values ​​OVA, OVB, and OVC are not linear and correction by multiplying by a coefficient according to time is difficult.

[0039] 1.5 Processing flow FIG. 9 is a flowchart showing the flow of processing performed by the detection device of the first embodiment.

[0040] The detection device 1 executes steps S101 to S103 shown in FIG.

[0041] In step S101, the plurality of sensors 11A, 11B, and 11C detect the detection target and output a plurality of output values ​​OVA, OVB, and OVC, respectively.

[0042] In the following step S102, the timer unit 12 outputs the time TIME.

[0043] In the following step S103, the determination unit 14 makes a determination based on the output values ​​OVA, OVB, and OVC and the time TIME, and outputs a determination result JRi.

[0044] 2. Second embodiment The following describes the differences between the second embodiment and the first embodiment. For points that are not described, the second embodiment also employs the same configuration as that employed in the first embodiment.

[0045] FIG. 10 is a block diagram of the detection device according to the second embodiment.

[0046] The detection device 2 of the second embodiment shown in FIG. 10 includes a plurality of sensors 11A, 11B, and 11C, a timer unit 12, an output unit 13, and a determination unit .

[0047] In the detection device 2 of the second embodiment, as shown in FIG. 10 , the output unit 13 outputs the output values ​​OVA, OVB, and OVC, and at least one additional value AV different from the time TIME. The determination unit 14 performs a determination based on the output values ​​OVA, OVB, and OVC, the time TIME, and the output additional value AV, and outputs the determination result JRi. The determination unit 14 suppresses changes in the determination result JRi due to changes in the output values ​​OVA, OVB, and OVC caused by deterioration of the sensors 11A, 11B, and 11C. The determination unit 14 also suppresses changes in the determination result JRi due to deterioration of the sensors 11A, 11B, and 11C, making the sensors 11A, 11B, and 11C more susceptible to the conditions indicated by the additional value AV. These factors further reduce the need to replace the sensors 11A, 11B, and 11C. The additional value AV includes at least one selected from the group consisting of a temperature value, a humidity value, and an air pressure value, and preferably includes both a temperature value and a humidity value. When the additional value AV includes both a temperature value and a humidity value, an appropriate determination result JRi can be output even if the output values ​​OVA, OVB, and OVC are strongly affected by the volume of dust adhering to the sensors 11A, 11B, and 11C when the sensors 11A, 11B, and 11C deteriorate.

[0048] FIG. 11 is a diagram showing the data structure of a database referenced by a determination unit provided in the detection device of the second embodiment.

[0049] In the detection device 2 of the second embodiment, as shown in Figure 11, each of two or more value groups GV1, GV2, ..., Gi, ..., GVn-1, GVn includes a plurality of first comparison values ​​OVAC, OVBC and OVCC that are compared with a plurality of output values ​​OVA, OVB and OVC, respectively, a second comparison value TIMEC that is compared with time TIME, and at least one third comparison value AVC that is compared with at least one additional value AV, respectively.

[0050] The judgment unit 14 outputs a judgment result JRi associated with the value group GVi when the first comparison values ​​OVAC, OVBC, and OVCC included in the value group GVi contained in the value groups GV1, GV2, . . ., Gi, . . ., GVn-1, GVn respectively include the output values ​​OVA, OVB, and OVC, the second comparison value TIMEC included in the value group GVi includes the time TIME, and the third comparison value AVC included in the value group GVi respectively include the additional value AV. As a result, the judgment unit 14 outputs a judgment result JRi associated with the value group GVi which includes the output values ​​OVA, OVB, and OVC, the time TIME, and the additional value AV in the database DB. As a result, the judgment unit 14 makes a judgment based on the output values ​​OVA, OVB, and OVC, the time TIME, and the additional value AV, and outputs the judgment result JRi.

[0051] FIG. 12 is a table showing an example of the contents of a database referred to by a determination unit provided in the detection device of the second embodiment.

[0052] In the detection device 2 of the second embodiment, as shown in FIG. 12 , the database DB associates a determination result indicating that the type of odor is an apple scent with a value group consisting of the first comparison value OVAC of "12," the first comparison value OVBC of "26," the first comparison value OVCC of "33," the second comparison value TIMEC of "0," and the third comparison value TEMPC of "40," associates a determination result indicating that the type of odor is an apple scent with a value group consisting of the first comparison value OVAC of "10," the first comparison value OVBC of "20," the first comparison value OVCC of "30," the second comparison value TIMEC of "0," and the third comparison value TEMPC of "25," and associates a determination result indicating that the type of odor is an apple scent with a value group consisting of the first comparison value OVAC of "5," the first comparison value OVBC of "8," the first comparison value OVCC of "9," the second comparison value TIMEC of "0," and the third comparison value TEMPC of "5." a determination result indicating that the odor is an apple scent is associated with a first comparison value OVAC of "11," a first comparison value OVBC of "21," a first comparison value OVCC of "23," a second comparison value TIMEC of "17520," and a third comparison value TEMPC of "40," a determination result indicating that the odor is an apple scent is associated with a value group consisting of a first comparison value OVAC of "9," a first comparison value OVBC of "16," a first comparison value OVCC of "21," a second comparison value TIMEC of "17520," and a third comparison value TEMPC of "25," and a determination result indicating that the odor is an apple scent is associated with a value group consisting of a first comparison value OVAC of "5," a first comparison value OVBC of "6," a first comparison value OVCC of "6," a second comparison value TIMEC of "17520," and a third comparison value TEMPC of "5."Furthermore, the database DB associates a determination result indicating that the type of odor is a mandarin orange scent with a group of values ​​consisting of the first comparison value OVAC "24," the first comparison value OVBC "13," the first comparison value OVCC "33," the second comparison value TIMEC "0," and the third comparison value TEMPC "40," associates a determination result indicating that the type of odor is a mandarin orange scent with a group of values ​​consisting of the first comparison value OVAC "20," the first comparison value OVBC "10," the first comparison value OVCC "30," the second comparison value TIMEC "0," and the third comparison value TEMPC "25," and associates a determination result indicating that the type of odor is a mandarin orange scent with a group of values ​​consisting of the first comparison value OVAC "10," the first comparison value OVBC "4," the first comparison value OVCC "9," the second comparison value TIMEC "0," and the third comparison value TEMPC "5." A determination result indicating that the type of odor is a mandarin orange scent is associated with a group of values ​​consisting of the first comparison value OVAC of "22," the first comparison value OVBC of "10," the first comparison value OVCC of "23," the second comparison value TIMEC of "17520," and the third comparison value TEMPC of "40," a determination result indicating that the type of odor is a mandarin orange scent is associated with a group of values ​​consisting of the first comparison value OVAC of "18," the first comparison value OVBC of "8," the first comparison value OVCC of "21," the second comparison value TIMEC of "17520," and the third comparison value TEMPC of "25," and a determination result indicating that the type of odor is a mandarin orange scent is associated with a group of values ​​consisting of the first comparison value OVAC of "9," the first comparison value OVBC of "3," the first comparison value OVCC of "6," the second comparison value TIMEC of "17520," and the third comparison value TEMPC of "5."

[0053] FIG. 13 is a table showing examples of the types of odors detected by the detection device of the second embodiment immediately after the device is manufactured, the multiple output values ​​output by the multiple sensors provided in the detection device at that time, the time kept by the timing unit provided in the detection device at that time, and the temperature value output by the output unit provided in the detection device at that time.

[0054] As shown in FIG. 13, immediately after the detection device 2 of the second embodiment is manufactured, sensors 11A, 11B, and 11C respond to the scent of apples and output an output value OVA of "10," an output value OVB of "20," and an output value OVC of "30," respectively, and the timing unit 12 is counting down the time TIME of "0," and the output unit 13 is outputting a temperature value TEMP of "25." In this case, the output value OVA of "10," the output value OVB of "20," the output value OVC of "30," the time TIME of "0," and the temperature value TEMP of "25" match the first comparison value OVAC of "10," the first comparison value OVBC of "20," the first comparison value OVCC of "30," the second comparison value TIMEC of "0," and the third comparison value TEMPC of "25," respectively. Therefore, the judgment unit 14 outputs a judgment result indicating that the type of odor is an apple scent, which is associated with a group of values ​​consisting of the first comparison value OVAC being "10," the first comparison value OVBC being "20," the first comparison value OVCC being "30," the second comparison value TIMEC being "0," and the third comparison value TEMPC being "25." Furthermore, when sensors 11A, 11B, and 11C react to the scent of mandarin oranges and output an output value OVA of "20," an output value OVB of "10," and an output value OVC of "30," respectively, and the timer unit 12 counts down the time TIME of "0," and the output unit 13 outputs the temperature value TEMP of "25," the output value OVA of "20," the output value OVB of "10," the output value OVC of "30," the time TIME of "0," and the temperature value TEMP of "25" match the first comparison value OVAC of "20," the first comparison value OVBC of "10," the first comparison value OVCC of "30," the second comparison value TIMEC of "0," and the third comparison value TEMPC of "25," respectively. Therefore, the judgment unit 14 outputs a judgment result indicating that the type of odor is a mandarin orange scent, which is associated with a value group consisting of the first comparison value OVAC being "20," the first comparison value OVBC being "10," the first comparison value OVCC being "30," the second comparison value TIMEC being "0," and the third comparison value TEMPC being "25."

[0055] FIG. 14 is a table showing examples of the types of odors detected by the detection device of the second embodiment two years after the device was manufactured, the multiple output values ​​output by the multiple sensors provided in the detection device at that time, the time measured by the timing unit provided in the detection device at that time, and the temperature value output by the output unit provided in the detection device at that time.

[0056] As shown in Figure 14, when two years have passed since the detection device 2 of the second embodiment was manufactured, if sensors 11A, 11B, and 11C respond to the scent of apples and output an output value OVA of "11," an output value OVB of "21," and an output value OVC of "23," respectively, the timing unit 12 is counting the time TIME of "17520," and the output unit 13 is outputting a temperature value TEMP of "40," then the output value OVA of "11," the output value OVB of "21," the output value OVC of "23," the time TIME of "17520," and the temperature value TEMP of "40" will match the first comparison value OVAC of "11," the first comparison value OVBC of "21," the first comparison value OVCC of "23," the second comparison value TIMEC of "17520," and the third comparison value TEMPC of "40," respectively. Therefore, the judgment unit 14 outputs a judgment result indicating that the type of odor is an apple scent, which is associated with a value group consisting of the first comparison value OVAC of "11," the first comparison value OVBC of "21," the first comparison value OVCC of "23," the second comparison value TIMEC of "17520," and the third comparison value TEMPC of "40." Furthermore, if sensors 11A, 11B, and 11C respond to the scent of mandarin oranges and output an output value OVA of "22," an output value OVB of "10," and an output value OVC of "23," respectively, and the timing unit 12 counts the time TIME of "17520," and the output unit 13 outputs the temperature value TEMP of "40," then the output value OVA of "22," the output value OVB of "10," the output value OVC of "23," the time TIME of "17520," and the temperature value TEMP of "40" will match the first comparison value OVAC of "22," the first comparison value OVBC of "10," the first comparison value OVCC of "23," the second comparison value TIMEC of "17520," and the third comparison value TEMPC of "40," respectively.Therefore, the judgment unit 14 outputs a judgment result indicating that the type of odor is a mandarin orange scent, which is associated with a value group consisting of the first comparison value OVAC of "22," the first comparison value OVBC of "10," the first comparison value OVCC of "23," the second comparison value TIMEC of "17520," and the third comparison value TEMPC of "40."

[0057] In this way, in the detection device 2 of the second embodiment, even if the multiple output values ​​OVA, OVB, and OVC output in response to the apple scent change from "10," "20," and "30" to "11," "21," and "23," it is possible to output a determination result indicating that the type of odor is an apple scent. Also, even if the multiple output values ​​OVA, OVB, and OVC output in response to the mandarin orange scent change from "20," "10," and "30" to "22," "10," and "23," it is possible to output a determination result indicating that the type of odor is a mandarin orange scent. Therefore, even if two years have passed since the detection device 2 of the second embodiment was manufactured, it is not necessary to replace sensors 11A, 11B, and 11C.

[0058] FIG. 15 is a flowchart showing the flow of processing performed by the detection device of the second embodiment.

[0059] The detection device 2 executes steps S201 to S204 shown in FIG.

[0060] In step S201, the plurality of sensors 11A, 11B, and 11C detect the detection target and output a plurality of output values ​​OVA, OVB, and OVC, respectively.

[0061] In the following step S202, the output unit 13 outputs at least one additional value AV.

[0062] In the following step S203, the timer unit 12 outputs the time TIME.

[0063] In the following step S204, the determination unit 14 makes a determination based on the output values ​​OVA, OVB, and OVC, at least one additional value AV, and the time TIME, and outputs a determination result JRi.

[0064] 3 Third embodiment FIG. 16 is a cross-sectional view schematically illustrating an air purifier according to the third embodiment.

[0065] 16, an air purifier 21 of the third embodiment draws in air, purifies the drawn-in air, and blows out the purified air. The air purifier 21 does not purify the air when a pleasant scent is present, but purifies the air when an unpleasant scent is present.

[0066] 16, the air purifier 21 includes a housing 31, an air purifying unit 32, a detecting device 33, and a control unit 34. The air purifying unit 32 includes a filter 41 and a blower 42.

[0067] An air passage 31A is formed in the housing 31. The air passage 31A has an inlet 31B and an outlet 31C. The air passage 31A leads from the inlet 31B to the outlet 31C and guides air from the inlet 31B to the outlet 31C. The inlet 31B and the outlet 31C are exposed to the outside of the housing 31.

[0068] Air purifying section 32 is disposed in air passage 31A. Air purifying section 32 removes odor components, fine particles, dust, etc. from the air guided by air passage 31A, thereby purifying the air guided by air passage 31A.

[0069] Filter 41 is disposed in air passage 31A and arranged along intake port 31B. Filter 41 passes air drawn into intake port 31B and removes odor components, fine particles, dust, and the like from the passing air.

[0070] Fan 42 is disposed in air passage 31A. Fan 42 sends a wind that causes air to flow from inlet 31B to outlet 31C.

[0071] The detector 33 is the detector 1 of the first embodiment or the detector 2 of the second embodiment. The detector 33 detects the type of odor present in the vicinity of the air purifier 21.

[0072] The control unit 34 controls the air purifying unit 32 based on the determination of the detection device 33. If the detected odor type is a specific type, the control unit 34 stops the blower 42 from blowing air, causing the air purifying unit 32 to stop purifying the air, and if the detected odor type is not a specific type, the control unit 34 causes the blower 42 to blow air, causing the air purifying unit 32 to purify the air. As a result, if the odor type is a specific type, the odor is not removed, and if the odor type is not a specific type, the odor is removed. This makes it possible to remove undesirable odors while maintaining desirable odors, or to remove unintended odors while maintaining intended odors, etc.

[0073] FIG. 17 is a flowchart showing the flow of processing performed by the air purifier of the third embodiment.

[0074] The air purifier 21 executes steps S301 to S304 shown in FIG.

[0075] In step S301, detection device 3 detects the type of odor floating around air purifier 21.

[0076] In the following step S302, the control unit 34 determines whether the type of odor detected is a specific type. If the control unit 34 determines that the type of odor is a specific type, it executes step S303 and then step S301, and if it determines that the type of odor is not a specific type, it executes step S304 and then step S301.

[0077] In step S303, the control unit 34 causes the air purification unit 32 to stop purifying the air.

[0078] In step S304, the control unit 34 causes the air purification unit 32 to purify the air.

[0079] As a result, when a specific type of odor wafts around the air purifier 21, the specific type of odor is maintained, and when a type of odor other than the specific type wafts around the air purifier 21, the type of odor other than the specific type is removed.

[0080] The present disclosure is not limited to the above-described embodiments, and may be replaced with a configuration that is substantially the same as the configuration shown in the above-described embodiments, a configuration that has the same effect, or a configuration that can achieve the same purpose. [Explanation of symbols]

[0081] 1. Detection device 11A, 11B, 11C sensors 12 Timing section 13 Output section 14 Judgment section 21 Air Purifier 31 Case 31A Wind path 31B Intake port 31C Air outlet 32 Air purifier 33 Detection Device 34 Control Unit 41 Filters 42 Blower OVA, OVB, OVC output values TIME AV Addition Value JRi judgment results DB Database GV1,GV2,Gi,GVn-1,GVn value group JR1, JR2, JRi, JRn-1, JRn judgment results OVAC, OVBC, OVCC First comparison value TIMEC Second comparison value AVC Third Comparison Value

Claims

1. a plurality of sensors each outputting a plurality of output values; A timekeeping unit that keeps time, a determination unit that performs a determination based on the plurality of output values ​​and the time; A detection device comprising:

2. Making the determination based on the plurality of output values ​​and the time includes outputting a determination result associated with a value group including the plurality of output values ​​and the time in a database that associates a determination result with each of two or more value groups. The detection device according to claim 1 .

3. an output unit that outputs at least one additional value different from the plurality of output values ​​and the time; The determination unit makes the determination based on the plurality of output values, the time, and the at least one additional value. The detection device according to claim 1 .

4. Making the determination based on the plurality of output values, the time, and the at least one additional value includes outputting a determination result associated with a value group including the plurality of output values, the time, and the at least one additional value in a database that associates determination results with each of two or more value groups. The detection device according to claim 3 .

5. The at least one additional value includes at least one selected from the group consisting of a temperature value, a humidity value, and an air pressure value. The detection device according to claim 3 .

6. The plurality of output values ​​respectively indicate the amounts of a plurality of different components.

6. A detection device according to any one of claims 1 to 5.

7. The plurality of components are a plurality of odor components. The detection device according to claim 6.

8. an air purification unit that purifies the air; A detection device according to claim 7; a control unit that controls the air purifying unit based on the determination; An air purifier equipped with:

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