TW202300834A - Air purifier - Google Patents

Abstract

The air purifier (10) includes a body (11), a blower unit (12), an air purifying function unit (13), a CO2 detection unit (14), a pollution level detection unit (15), and a control unit (16). The body (11) has a suction port (111) and a blowing port (112). The blower unit (12) is arranged inside the body (11), and sucks indoor air (A) from the suction port (111) of the body (11), and blows it out into the room from the blowing port (112). The air purifying function unit (13) purifies the air (A) sucked in from the suction port (111) by the blower unit (12). The CO2 detection unit (14) detects the concentration of CO2 in the room. The pollution level detection unit (15) detects the pollution level of the indoor air (A). The control unit (16) uses the CO2 concentration detected by the CO2 detection unit (14) to determine the presence or absence of a person in the room, and controls the air volume of the blower unit (12) based on the CO2 concentration and the pollution level detected by the pollution level detection unit (15).

Description

air purifier

This disclosure relates to an air cleaner for cleaning indoor air.

Patent Document 1 discloses an air cleaner equipped with a human body sensor that detects the motion of a person present in a room to be cleaned. Patent Document 1 controls the operating air volume in accordance with the state of human motion known from the detection signal of the human body sensor and the state of indoor brightness known from the detection signal of the illuminance sensor. [Prior Art Literature] [Patent Document]

[Patent Document 1] WO 2018/189926

[Problem to be Solved by the Invention]

However, in the above-mentioned conventional technology, since the human body sensor is used, the detection range of the human body sensor must be set within the range of human activities. Therefore, there is a problem that the air cleaner must be installed in a place where the detection will not be obstructed by furniture, etc., or there is a problem that the installation position of the air cleaner must be installed in order to rotate the pedestal of the human body sensor. The structure of the air cleaner is complicated.

This disclosure was made in consideration of the above-mentioned problems, and aims to obtain an air purifier that is not limited by the installation position in the room, does not complicate the structure, and can operate according to the presence or absence of people in the room. [Means to solve the problem]

In order to solve the above-mentioned problems and achieve the purpose, the air cleaner disclosed in the present disclosure includes a body, an air supply unit, an air cleaning function unit, a _CO2 detection unit, a pollution degree detection unit, and a control unit. The machine system has a suction port and a blowout port. The air blowing part is arranged inside the machine body, sucks the air in the room from the suction port of the machine body and blows it out to the room from the air outlet. The air cleaning function part cleans the air sucked in from the suction port by the air supply part. The CO ₂ detection unit detects the CO ₂ concentration in the chamber. The pollution degree detecting unit detects the pollution degree of the indoor air. The control unit uses the CO ₂ concentration detected by the CO ₂ detection unit to determine whether there are people in the room, and controls the air volume of the air supply unit according to the CO ₂ concentration and the pollution degree detected by the pollution degree detection unit. [Efficacy of the invention]

The air purifier disclosed in the present disclosure is not limited by the installation position in the room, the structure is not complicated, and the function of operation can be corresponding to whether there are people in the room.

Hereinafter, an air cleaner according to an embodiment of the present disclosure will be described in detail based on the drawings.

Implementation type 1. FIG. 1 is a schematic diagram showing an example of the configuration of an air cleaner of Embodiment 1. FIG. The air cleaner 10 is used, for example, by being placed on the floor indoors. The air cleaner 10 is equipped with: a body 11, which has a suction port 111 and an air outlet 112, and an air supply unit 12, which sucks the air A from the suction port 111 and blows out the air flow formed by the air A flowing toward the air outlet 112, and The air cleaning function part 13 is arranged on the upstream side of the blower part 12 .

Inside the body 11 , the space from the suction port 111 to the blowing port 112 is called an air path 113 . An example of the air blower 12 is a multi-blade air blower including a motor and a fan fitted to the rotation shaft of the motor. The air cleaning function part 13 removes dust etc. in the air A sucked in from the suction port 111, and purifies the air A. An example of the air cleaning function unit 13 is an electric dust collector. The electric dust collector is arranged in the middle of the air duct 113, and performs electric dust collection on the indoor air A sucked from the suction port 111 to clean it. The electric dust collector is equipped with a positive electrode made of metal, which receives the application of a high voltage of about 10 kV, and a ground electrode made of metal, which is set at the same potential as the ground potential. The electric dust collector forms a discharge space between the positive electrode and the ground electrode, and charges the dust passing through the discharge space. The electric dust collector is equipped with a conductive dust collection filter set to the same potential as the ground potential in the air duct 113 at the rear of the discharge space, and uses Coulomb force to suck the charged dust to the ground electrode and the dust collection filter for dust collection.

The air blower 12 is disposed inside the machine body 11 , sucks the air A in the room through the suction port 111 of the machine body 11 and blows it out into the room through the air outlet 112 . The air blower 12 is switchable between an operating state and a stopped state, and the air volume can be changed in plural steps in the operating state. In the following description, the operation state of the blower unit 12 is described as being switchable among three stages: a low air volume state, a medium air volume state, and a high air volume state. In the running state, the smaller the air volume, the lower the noise.

The air A sucked in from the suction port 111 enters the air blowing part 12 after passing through the air cleaning function part 13 provided in the air passage 113 . In this way, dust and the like in the air A are removed. The air A blown from the air blower 12 passes through the air passage 113 and is blown out into the room from the air outlet 112 .

The air purifier 10 is equipped with: _CO Detecting part 14, _CO concentration in the detection chamber, pollution degree detecting part 15, pollution degree of air A in the detection room, and a control part 16, based on _CO Detecting part 14 The air blowing volume of the blower unit 12 is controlled based on the detection result and the detection result of the pollution degree detection unit 15 . An example of the CO ₂ detection unit 14 is a CO ₂ sensor. Concretely, the pollution degree detection unit 15 is a dust sensor for detecting the concentration of dust, an odor sensor for detecting the concentration of odorous substances, and the like. The odorous substance is a substance emitted from the human body, and one example thereof is ammonia, hydrogen sulfide, or methyl mercaptan. In this specification, the degree of pollution indicates the concentration of pollutants in the air A such as dust and odorous substances, and a higher degree of pollution indicates that the air A is polluted. In addition, although not shown, the blower unit 12, the CO ₂ detection unit 14, and the pollution degree detection unit 15 are electrically connected to the control unit 16 through wiring.

The control unit 16 determines whether or not there is a person in the room based on the CO ₂ concentration detected by the CO ₂ detection unit 14 . As an example, when the CO ₂ concentration in the atmosphere when a person is considered to be present is used as the judgment reference value, if the CO ₂ concentration is greater than the judgment reference value, it is judged that a person is present. Specifically, the CO ₂ concentration in the atmosphere is usually around 400 ppm, so setting the judgment reference value at around 600 ppm can more accurately determine whether there are people in the room. The determination reference value corresponds to the first reference value.

Typically, the sensor that detects the presence of a person in a room is a human sensor that uses heat detection. The human body sensor must set the detection range of the human body sensor within the range of human activities. Therefore, the air cleaner 10 must be installed in a place where the detection of people will not be blocked by furniture or the like. As far as the air cleaner using the human body sensor is concerned, the installation position is limited. Alternatively, in order to detect human activities, the seat of the human body sensor must be rotatable and complicated, which increases the manufacturing cost of the air cleaner. However, when the _CO2 detection unit 14 is used to detect whether there is a person in the room as in Embodiment 1, due to the fact that the _CO2 exhaled by the user will diffuse in the room, compared with the human body sensor, it will not be affected by furniture, etc. presence hinders detection. Therefore, the installation position of the air cleaner 10 is not limited, and it is not necessary to make the pedestal of the _CO2 detection unit 14 a rotatable and complicated structure for detection. Compared with the case of rotating the pedestal, a simpler The structure is used to reduce the manufacturing cost of the air purifier 10 . In addition, although CO ₂ is also generated when cooking appliances that burn gas, kerosene, or other fuels or indoor heating appliances are used, since they are used only when people are present, it will not be misjudged as "a state where no one is present" and The reason for the "state of human existence".

The control unit 16 controls the air volume of the blower unit 12 based on the detection results of the CO ₂ detection unit 14 and the pollution degree detection unit 15 . Specifically, the control unit 16 performs low-volume operation or stops operation when there are people in the room and the indoor air is not polluted, and performs medium-volume operation when the indoor air is polluted. In addition, the control unit 16 performs low air volume operation or stops operation when no one is present in the room and the indoor air is not polluted, and performs high air volume operation when the indoor air is polluted.

The control unit 16 is implemented in the form of a processing circuit. The processing circuit can be dedicated hardware, integrated circuit, or a circuit equipped with a processor. FIG. 2 is a block diagram showing an example of a hardware configuration of a control unit included in the air cleaner of Embodiment 1. FIG. The control unit 16 includes a processor 501 and a memory 502 . The processor 501 is a CPU (Central Processing Unit, also known as a central processing device, a processing device, a calculation device, a microprocessor, a microcomputer, a digital signal processor (Digital Signal Processor; DSP)), a large-scale integrated circuit (Large Scale Integration; LSI) system, etc. Memory 502 is RAM (Random Access Memory), ROM (Read Only Memory), flash memory, EPROM (Erasable Programmable Read Only Memory), EEPROM (registered trademark) (Electrically Erasable Programmable Read-Only Memory) and other non-volatile Or volatile semiconductor memory, magnetic disk, floppy disk, optical disk, CD, MD (MiniDisc) or DVD (Digital Versatile Disc), etc. The processor 501 and the memory 502 are connected via a bus line 503 .

The control unit 16 is realized by reading a program from the memory 502 and executing the program by the processor 501, wherein the program is written to control the blower unit according to the detection results of the _CO2 detection unit 14 and the pollution degree detection unit 15 12 procedures for the handling of air volume. In addition, the above functions can be realized by a plurality of processors and a plurality of memories cooperating. In addition, part of the functions of the control unit 16 may be configured as an electronic circuit belonging to dedicated hardware, while other parts may be realized by the processor 501 and the memory 502 . In one example, the control unit 16 controls the operation of the blower unit 12 using electrical signals.

Next, operation|movement of the air cleaner 10 comprised in this way is demonstrated. FIG. 3 is a flow chart showing an example of a control processing program of a control unit of the air cleaner of Embodiment 1. FIG. First, when the power supply of the air cleaner 10 arranged indoors is turned on, the air cleaner 10 starts to operate. The control unit 16 acquires the CO ₂ concentration from the CO ₂ detection unit 14 (step S11), and judges whether or not the acquired CO ₂ concentration is greater than or equal to a determination reference value for determining the presence of a person in the room (step S12).

If the CO ₂ concentration is lower than the determination reference value ("No" in step S12), the control unit 16 determines that there is no one in the room (step S13). Then, the control unit 16 acquires the detection result of the pollution degree from the pollution degree detection unit 15 (step S14), and determines whether or not the indoor air A is polluted (step S15). As described above, an example of the pollution degree detected by the pollution degree detection unit 15 is the dust concentration or the odor concentration. Here, the control unit 16 judges whether or not the pollution degree is equal to or higher than a pollution judgment reference value that can judge that the indoor is polluted by the pollutant. The pollution determination reference value may be a different value or the same value in accordance with the case where the object detected by the pollution degree detection unit 15 is dust and when it is an odorous substance. The pollution determination reference value corresponds to the second reference value.

If it is determined that the indoor air A is not polluted (the result of step S15 is "No"), that is, when the pollution degree does not reach the pollution determination reference value, since it is better to suppress wasteful power consumption, the control unit 16 will send air The unit 12 is controlled to operate at a small air volume or to stop the operation (step S16). It can be distinguished according to the value of the detection result whether to operate with a small air volume or to stop the operation. Thereafter, the process returns to step S11.

If it is determined that the air A in the room is polluted (the result of step S15 is "Yes"), that is, when the pollution degree is above the pollution determination reference value, the air A will be changed in a short time before it becomes a state where people exist. It is better to be clean, so the control unit 16 controls the air supply unit 12 to operate with a large air volume (step S17). Thereafter, the process returns to step S11.

When it is determined in step S12 that the CO ₂ concentration is equal to or greater than the determination reference value (YES in step S12), the control unit 16 determines that a person exists in the room (step S18). Then, the control part 16 acquires the detection result of the pollution degree from the pollution degree detection part 15 (step S19), and determines whether the indoor air A is polluted (step S20). Here too, the control unit 16 determines whether or not the degree of pollution is equal to or greater than the pollution determination reference value in the same manner as step S15.

If it is determined that the indoor air A is not polluted (the result of step S20 is "No"), that is, when the pollution degree does not reach the pollution determination reference value, the air purifier 10 can be operated as silently as possible and wasteful power consumption can be suppressed. Preferably, the control unit 16 controls the air supply unit 12 to operate with a small air volume or to stop the operation (step S21). It can be distinguished according to the value of the detection result whether to operate with a small air volume or to stop the operation. Thereafter, the process returns to step S11.

If it is determined that the air A in the room is polluted (the result of step S20 is "Yes"), that is, when the degree of pollution is above the pollution determination reference value, the noise caused by the operation of the air cleaner 10 does not hinder people entering the room. It is better to make the air A clean under the degree of operation, so the control unit 16 controls the air supply unit 12 to operate at a medium air volume (step S22). That is, the control unit 16 increases the air volume of the blower unit 12 . Thereafter, the process returns to step S11.

In the process of repeatedly executing the above control processing, if the indoor changes from "the state of air A being polluted" to "the state of not polluting air A" or the state of air quality changes in reverse, follow the flow chart in Figure 3 The figure reduces or increases the air volume of the blower unit 12 .

Here, in step S12, the control unit 16 determines that the room is occupied when the CO ₂ concentration is the determination reference value, but may determine that the room is not occupied. In step S15, the control unit 16 controls the air blower 12 to operate at a high air volume when the pollution level is the pollution judgment reference value, but the air blower 12 may be controlled to operate at a low air volume or stopped. In step S20, the control unit 16 controls the air blower 12 to operate at a medium air volume when the pollution level is the pollution judgment reference value, but the air blower 12 may be controlled to operate at a low air volume or stopped.

The air cleaner 10 of Embodiment 1 is equipped with a CO ₂ detection unit 14 , a pollution degree detection unit 15 and a control unit 16 . The control unit 16 uses the CO ₂ concentration detected by the CO ₂ detection unit 14 to determine whether there is a person in the room where the air cleaner 10 is placed. Furthermore, the control unit 16 controls the air volume of the blower unit 12 based on whether there is presence or absence in the room and the detection result of the pollution degree by the pollution degree detection unit 15 . When a human body sensor is used to detect the presence or absence of a person in a room, a complex structure such as rotating the base of the human body sensor is required, and the installation of such a structure increases the cost of manufacturing the air purifier. However, in Embodiment 1, the CO ₂ detection unit 14 only detects the CO ₂ concentration in the air A, and does not require a structure for rotating the pedestal, so that the structure can be simplified compared with the case of using a human body sensor. As a result, the cost of manufacturing the air cleaner 10 can be reduced compared to the case of using a human sensor, and the operation can be performed depending on whether there is a person in the room. In addition, when the air purifier uses a human body sensor, the detection range of the human body sensor must be set within the range of human activities, and it must be arranged in a position where it will not be blocked by furniture and so on. restricted. In contrast, the air cleaner 10 of Embodiment 1 uses the _CO2 concentration in the air A to determine whether there are people in the room, so there is no restriction on the installation position of the air cleaner using human sensors. In other words, the air purifier 10 of Embodiment 1 can be placed anywhere in the room.

CO ₂ concentration also increases when a cooking appliance that burns fuel such as gas or kerosene to generate CO ₂ or an indoor heating appliance is used in the room where the air cleaner 10 is installed. However, cooking appliances or room warming appliances are appliances that are only used when people are present. Therefore, in the form of judging the presence or absence of people by using the _CO2 concentration, even if there is a cooking appliance or an indoor heating appliance as described above, it will not be a cause of misjudgment of a state where no one is present and a state where people are present.

Implementation Type 2. CO ₂ concentrations are known to affect productive performance or health status. Therefore, there is a prescribed value for the _CO2 concentration. For example, the Building Management Law of Japan stipulates that the indoor CO ₂ concentration of a building should be 1000 ppm or less. Currently there is no filter capable of removing CO ₂ that can be installed in the air cleaner 10 . Therefore, in order to reduce the indoor CO ₂ concentration, a ventilation device is generally used to exchange the outside air of the outside air A and the indoor air A. Regarding this, in Embodiment 2, the air purifier 10 that can cooperate with the ventilation device to reduce the CO ₂ concentration in the room will be described.

FIG. 4 is a diagram schematically showing an example of the configuration of an air cleaning system equipped with an air cleaning machine of Embodiment 2. FIG. Here, the same constituent elements as those in Embodiment 1 are denoted by the same reference numerals, and description thereof will be omitted. The air cleaning system includes an air cleaner 10 and a ventilation device 30 .

The air cleaner 10 is provided with the signal transmission part 17 in addition to the structure demonstrated in Embodiment 1. As shown in FIG. The signal sending part 17 is electrically connected with the control part 16, and sends a signal to the ventilation device 30 through wireless communication. In one example, the signal transmission unit 17 transmits a signal using infrared rays.

The control unit 16 controls the operation of the air cleaner 10 and the ventilator 30 according to the CO ₂ concentration detected by the CO ₂ detection unit 14 and the pollution degree detected by the pollution degree detection unit 15 so that the indoor 51 becomes a predetermined CO2 level. ₂ concentration and pollution degree. When the control unit 16 wants to control the operation of the ventilation device 30 , it generates an operation signal indicating the operation of the ventilation device 30 and sends it to the ventilation device 30 through the signal transmission unit 17 .

The ventilation device 30 is a device capable of taking in the air A outside the building 50 , that is, outside air, into the room 51 and exhausting the air A in the room 51 to the outside of the building 50 . As an example, the ventilating device 30 may be a ventilating device of the first ventilating type that mechanically performs intake and exhaust, or may be a ventilating device that mechanically performs intake and exhausts air from the exhaust port. The ventilation device of the two types of ventilation can also be the ventilation device of the third ventilation type that exhausts air mechanically and takes in air from the air inlet. In the case of the ventilation device of the first ventilation type, a heat exchanger 34 may be provided inside the ventilation device 30 .

The ventilator 30 illustrated in FIG. 4 is a ventilator of the first ventilating type provided with a heat exchanger 34 . The ventilation device 30 includes a body 31 , an intake fan 32 , an exhaust fan 33 , a heat exchanger 34 , an outside air cleaning filter 35 , a signal receiving unit 36 and a control unit 37 .

The body 31 has an outside air inlet 311 , an intake outlet 312 , a room air inlet 313 and an exhaust outlet 314 . Inside the machine body 31 is formed an intake air passage connecting the external air inlet 311 and the air intake outlet 312 , and an exhaust air passage connecting the indoor air inlet 313 and the exhaust outlet 314 . The air intake air path and the exhaust air path are separated from each other. The air intake fan 32 is arranged on the air intake air path, and the exhaust fan 33 is arranged on the exhaust air path. The heat exchanger 34 is arranged at a position where the exhaust air passage intersects the intake air passage. The outside air cleaning filter 35 is provided at the outside air inlet 311, and removes dust, pollen, etc. contained in the outside air. The signal receiving part 36 receives the operation signal from the air cleaner 10, for example. The control unit 37 controls the operation of the intake fan 32 and the exhaust fan 33 according to the operation signal received by the signal receiving unit 36 . The intake fan 32 , the exhaust fan 33 and the signal receiving unit 36 are all electrically connected to the control unit 37 .

When the ventilator 30 can be operated with a remote controller, the ventilator 30 includes a remote controller signal receiving unit that receives a signal from the remote controller. Therefore, the remote controller signal receiving unit can also replace the signal receiving unit 36 . Hereinafter, the remote controller is referred to as a remote controller. But this time, the remote code of the signal transmitter 17 of the air purifier 10 should be set to be consistent with the remote code of the signal transmitter 17 of the air cleaner 10 and the signal receiver 36 of the ventilator 30 .

Next, control performed by the control unit 16 of the air cleaner 10 in such an air cleaner system will be described. But as shown in FIG. 4 , it is assumed that the ventilation device 30 is used for the first ventilation.

The control part 16 of the air purifier 10 is when the _CO2 concentration detected by the _CO2 detection part 14 does not reach the exhaust reference value of the predetermined reference value, and generates and sends an instruction to the ventilation device 30 to operate at a normal air volume. That is, the operation signal of normal air volume operation. The normal air volume operation is, for example, the operation of the air volume prescribed by Japanese law, and is an operation mode performed in normal times. The control unit 16 generates and transmits an operation signal instructing the operation of increasing the air volume of the ventilator 30 when the detected CO ₂ concentration is higher than the exhaust reference value. The operation signal at this time includes an instruction to set the air volume to the air volume corresponding to the difference between the CO ₂ concentration and the exhaust reference value. That is, the greater the difference between the CO ₂ concentration and the exhaust reference value, the greater the air volume. In addition, the control unit 16 generates and transmits an operation signal instructing the ventilator 30 to perform normal air volume operation when the CO ₂ concentration in the room 51 is lower than the exhaust reference value. When the _CO2 concentration is equal to the exhaust reference value, the control unit 16 may generate and send an operation signal instructing the ventilator 30 to perform an operation to increase the air volume, or may generate and send an operation signal instructing the normal air volume operation. The exhaust reference value corresponds to the third reference value.

When the CO ₂ concentration in the room 51 is higher than the exhaust reference value, generally speaking, if the air volume of the ventilator 30 is increased, the pollution degree, that is, the dust concentration or the odor concentration will decrease accordingly. This is because the ventilation device 30 exhausts the CO ₂ in the room 51 as well as the dust and odor, and the external air flowing in instead is cleaner than the air A in the room 51 . Therefore, when an operation instruction to increase the air volume of the ventilator 30 is sent, the control unit 16 performs the air blowing of the air cleaner 10 when the pollution degree of the room 51 detected by the pollution degree detection unit 15 has decreased. The control of the air volume reduction of the section 12. Thereby, the noise and power consumption of the air cleaner 10 can be reduced.

However, due to seasonal conditions of external air such as pollen, dust, suspended particles (Particulate Matter; PM) 2.5, cooking odor, or surrounding work conditions, the external air may be more polluted than the air A in the room 51 . At this time, if the air volume of the ventilator 30 is increased, the dust concentration or the odor concentration will increase on the contrary, and the value indicating the pollution degree detected by the pollution degree detection unit 15 will increase accordingly. In such a case, the control part 16 performs the control which maintains the air volume of the time point, without reducing the air volume of the air cleaner 10. FIG.

Furthermore, similarly, the outside air is more polluted than the air A in the room 51, and when the ventilator 30 is a ventilator of the first kind of ventilating type, the control unit 16 can also generate and send an instruction to switch to suppress exhaust. And increase the operation signal of the air intake operation mode. This is because the path of the air intake of the ventilation device 30 is often equipped with an external air cleaning filter 35 . As an example of switching to the operation mode of suppressing exhaust gas and increasing intake air of the ventilator of the first type of ventilation type, for example, switching from the exhaust mode to the exhaust and intake mode can be given.

5 and 6 are flowcharts showing an example of the control processing program of the control unit of the air cleaner of Embodiment 2. First, when the power supply of the air cleaner 10 arranged indoors is turned on, the air cleaner 10 starts to operate. And at this time, the ventilator 30 installed in the room 51 is at least in a state of performing exhaust operation. The control unit 16 of the air purifier 10 acquires the CO ₂ concentration from the CO ₂ detection unit 14 (step S31), and determines whether the acquired CO ₂ concentration is equal to or greater than the exhaust reference value (step S32).

If the _CO2 concentration is lower than the exhaust reference value (the result of step S32 is "No"), the control unit 16 generates an operation signal instructing normal air volume operation, and sends the operation signal to the ventilator through the signal transmission unit 17. device 30 (step S33). Thereafter, as in steps S11 to S22 of FIG. 3 of Embodiment 1, the air volume of the air cleaner 10 is controlled in response to the _CO concentration from the _CO detection unit 14 and the pollution degree from the pollution degree detection unit 15. (Steps S34 to S45). Thereafter, the process returns to step S31.

If the _CO2 concentration is above the exhaust reference value (the result of step S32 is "Yes"), the control unit 16 generates an air volume increase operation instruction to increase the air volume compared with the current air volume of the ventilator 30. The operation signal is sent to the ventilator 30 via the signal sending unit 17 (step S46). In one example, the control unit 16 generates an operation signal capable of performing an air volume increase operation in which the air volume becomes an air volume corresponding to the difference between the CO ₂ concentration and the exhaust gas reference value.

Thereafter, the control unit 16 acquires the detection result of the pollution level from the pollution level detection unit 15 (step S47), and determines whether the pollution level in the room 51 has decreased (step S48). Whether or not the pollution degree in the room 51 has decreased can be determined using, for example, a plurality of pollution degree values obtained from the pollution degree detection unit 15 within a predetermined period of time.

If the pollution degree in the room 51 has been reduced (the result of step S48 is "Yes"), the control unit 16 controls the air supply unit 12 so that the air volume is reduced to the air volume of the air supply unit 12 of the air cleaner 10 at the time point. small (step S49). Thereafter, the process returns to step S31.

If the pollution degree in the room 51 increases (the result of step S48 is "No"), the control unit 16 controls the air supply unit 12 to maintain the air volume of the air cleaner 10 at that point (step S50). Furthermore, the control unit 16 generates an operation signal indicating to switch to an operation mode that suppresses exhaust gas and increases intake air, and sends the operation signal to the ventilator 30 via the signal transmission unit 17 (step S51). Thereafter, the process returns to step S31.

As described above, in Embodiment 2, the control unit 16 of the air cleaner 10 sends an operation instruction to control the air volume to the ventilator 30 installed in the room 51 according to the detection result of the CO ₂ concentration in the room 51 . In particular, when the CO ₂ concentration exceeds the exhaust reference value, an operation instruction to increase the exhaust air volume of the ventilator 30 is sent. And, in this state, if the pollution degree in the room 51 decreases, the air volume of the air cleaner 10 is reduced, and if the pollution degree in the room 51 increases, the air volume of the air cleaner 10 is maintained at the air volume at the time point, and An operation signal instructing switching to an operation mode in which exhaust gas is suppressed and intake air is increased is sent to the ventilator 30 . In this way, the control unit 16 can detect whether there are people and activities in the room 51, and can control the operating status of the air cleaner 10 and the ventilation device 30 to reduce the CO concentration and _the CO concentration in the room 51 that is deteriorated due to the activities of people. Pollution degree improvement becomes the effect of predetermined range.

The configuration shown in the above embodiments is only an example, and it can be implemented in combination with other known technologies, and can also be implemented in combination with each other. Within the scope of not departing from the gist, a part of the configuration can also be omitted or changed. .

10: Air cleaner 11, 31: Body 12: Air supply unit 13: Air cleaning function unit 14: CO ₂ detection unit 15: Pollution degree detection unit 16, 37: Control unit 17: Signal transmission unit 30: Ventilation device 32: Intake fan 33: Exhaust fan 34: Heat exchanger 35: External air cleaning filter 36: Signal receiving unit 50: Building 51: Indoor 111: Suction inlet 112: Blow outlet 113: Air duct 311: External air suction inlet 312: Air intake outlet 313: Indoor air inlet 314: Exhaust outlet 501: Processor 502: Memory A: Air S11, S12, S13, S14, S15, S16, S17, S18, S19, S20, S21 ,S22,S31,S32,S33,S34,S35,S36,S37,S38,S39,S40,S41,S42,S43,S44,S45,S46,S47,S48,S49,S50,S51: step

FIG. 1 is a schematic diagram showing an example of the configuration of an air cleaner of Embodiment 1. FIG. FIG. 2 is a block diagram showing an example of a hardware configuration of a control unit included in the air cleaner of Embodiment 1. FIG. FIG. 3 is a flow chart showing an example of a control processing program of a control unit of the air cleaner of Embodiment 1. FIG. FIG. 4 is a diagram schematically showing an example of the configuration of an air cleaning system equipped with an air cleaner of Embodiment 2. FIG. FIG. 5 is a flow chart showing an example of a control processing program of a control unit of the air cleaner of Embodiment 2. FIG. FIG. 6 is a flow chart showing an example of a control processing program of a control unit of the air cleaner of Embodiment 2. FIG.

10: Air purifier

11: Body

12: Air supply department

13: Air cleaning function department

14: CO ₂ detection unit

15: Pollution degree detection department

16: Control Department

111: Suction port

112: outlet

113: wind road

A: air

Claims (10)

An air purifier comprising: a body having a suction port and a blowing outlet; an air supply unit disposed inside the body, sucking indoor air from the suction port of the body and blowing it out into the room from the blowing port ; The air cleaning function part is used to purify the air inhaled from the aforementioned suction port by the aforementioned air supply part; the _CO2 detecting part is used to detect the _CO2 concentration in the aforementioned room; degree; and the control part is to use the _CO concentration detected by the _CO detection part to determine whether there are people in the aforementioned room, and to control the aforementioned air blowing part according to the CO concentration and the pollution degree detected by the pollution degree detection part air volume. The air purifier as described in claim 1, wherein, The control unit is when the CO2 concentration is lower than a first reference value for judging that the indoor air is polluted, and the pollution degree is higher than a second reference value for judging that the indoor air is polluted. , to increase the air volume of the aforementioned air supply unit. The air purifier as described in claim 1, wherein, The control unit is when the CO2 concentration is lower than a first reference value for judging that the indoor air is polluted, and the pollution degree is lower than a second reference value for judging that the indoor air is polluted. , to reduce or stop the air volume of the aforementioned air supply unit. The air purifier as described in claim 1, wherein, The control unit is when the CO2 concentration is higher than a first reference value for judging that the room is occupied, and the pollution degree is lower than a second reference value for judging that the air in the room is polluted. , to reduce or stop the air volume of the aforementioned air supply unit. The air purifier as described in claim 1, wherein, The aforementioned air supply unit can change the air volume of multiple stages; The control unit is when the CO2 concentration is higher than a first reference value for judging that the indoor is occupied, and the pollution degree is higher than a second reference value for judging that the indoor air is polluted. , so that the air volume of the aforementioned air supply unit is the air volume in the plurality of stages. The air purifier as described in any one of Claims 1 to 5 further includes: a signal sending unit that sends a signal to the ventilation device installed in the aforementioned room; the aforementioned control unit is based on the detection of the aforementioned CO ₂ detection unit The concentration of CO ₂ is transmitted from the signal transmitting part to control the operation signal of the air volume of the ventilation device. The air purifier according to claim 6, wherein the control unit sends a signal from the signal transmission unit to increase the air volume of the ventilation device when the CO ₂ concentration in the room is greater than a predetermined third reference value. run signal. The air purifier as described in Claim 7, wherein, The control unit decreases the air volume of the ventilation unit after the transmission of the operation signal for increasing the air volume of the ventilator. The air purifier as described in Claim 7, wherein, The control unit maintains the air volume of the ventilation unit when the pollution degree increases after the transmission of the operation signal to increase the air volume of the ventilator. The air purifier as described in Claim 9, wherein, The control unit transmits the ventilation unit that suppresses exhaust and increases intake air through the signal transmission unit when the pollution level increases after the transmission of the operation signal that increases the air volume of the ventilation unit. the running signal.

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