Ventilation system

Abstract

To acquire a ventilation device which can efficiently reduce the contamination of air in a room by one unit.SOLUTION: A ventilation device 100 includes: a housing 1 where a plurality of indoor air suction ports 3 provided separately corresponding to a plurality of different ventilation object regions in a room interior 210 and an exhaust port 2 are provided; a blower 5 disposed in the housing 1, and for generating a flow of indoor air from the suction port to the exhaust port 2; a plurality of suction port opening / closing parts 4 for opening / closing each of the plurality of suction ports; a plurality of contamination amount detection parts 6 provided at each of the plurality of indoor air suction ports 3, and for detecting the contamination amount of indoor air passing each of the plurality of indoor air suction ports 3; and a control part 7 for controlling the opening / closing operation of the suction port opening / closing part 4 and the air amount of the blower 5 based on the contamination amount of the indoor air of each of the plurality of ventilation object regions.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a ventilation device including a detection unit that detects the amount of contaminants in the air. [Background technology]

[0002] In recent years, interest in improving indoor environments has increased as buildings have become more airtight. 2 Attention has been focused on reducing indoor air pollutants such as PM2.5, tobacco smoke, etc. In order to reduce indoor air pollution, it is common to ventilate the room using a ventilation system equipped with a blower to exhaust the indoor air to the outside. Fine particulate matter is also called PM2.5 (Particulate Matter).

[0003] Even within a single space such as a room, there are areas with high levels of contamination and areas with low levels of contamination depending on the positions of people and objects, the density of people and objects, etc. Therefore, in order to efficiently reduce indoor air contamination, it is necessary to ventilate the space based on the results of detecting the levels of air contamination at multiple points within the space, rather than detecting the level of air contamination at one point within the space and ventilating the space based on that result.

[0004] Patent Document 1 discloses a ventilation system in which multiple ventilation devices equipped with carbon dioxide sensors are installed in one target space. In the ventilation system disclosed in Patent Document 1, the control device controls the number of operating ventilation devices so that the detection value of the carbon dioxide sensor for all operating ventilation devices is below a reference value. The control device increases the number of operating ventilation devices as the threshold value set as the reference value from among multiple threshold values ​​increases, and decreases the number of operating ventilation devices as the set threshold value decreases. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2018-119752 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, the technology disclosed in Patent Document 1 requires multiple ventilation devices each equipped with a sensor for detecting the amount of air pollution, and a control device for controlling the number of ventilation devices in operation must be provided separately from the ventilation devices. In other words, the technology disclosed in Patent Document 1 requires multiple ventilation devices to be installed and each to be controlled individually in order to efficiently reduce indoor air pollution.

[0007] The present disclosure has been made in consideration of the above, and has an object to provide a ventilation device that can efficiently reduce indoor air pollution with a single unit. [Means for solving the problem]

[0008] In order to solve the above-mentioned problems and achieve the object, the ventilation device according to the present disclosure includes a housing provided with a plurality of intake ports and an exhaust port, each of which is provided corresponding to a plurality of different ventilation target areas in a room, and a blower disposed within the housing and generating a flow of indoor air from the intake port to the exhaust port. The ventilation device includes a plurality of intake port opening / closing units that open and close each of the plurality of intake ports, a plurality of dirt amount detection units that are provided in each of the plurality of intake ports and detect the amount of dirt in the indoor air passing through each of the plurality of intake ports, and a control unit that controls the opening / closing operation of the intake port opening / closing unit and the air volume of the blower based on the amount of dirt in the indoor air in each of the plurality of ventilation target areas. Effect of the Invention

[0009] According to the present disclosure, it is possible to obtain an advantageous effect of providing a ventilation device capable of efficiently reducing indoor air pollution with a single unit. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic diagram showing a configuration of a ventilation device according to a first embodiment. [Diagram 2] Functional block diagram of a ventilation device according to embodiment 1 [Diagram 3] A flowchart showing a procedure of a ventilation operation in the ventilation device according to the first embodiment. [Figure 4] FIG. 1 is a condition setting table showing operation control conditions in the ventilation device according to the first embodiment. [Diagram 5] FIG. 13 is a schematic diagram showing the configuration of a ventilation device according to a second embodiment. [Figure 6] FIG. 13 is a schematic diagram showing the configuration of a ventilation device according to a third embodiment. [Figure 7] FIG. 13 is a diagram showing an example of a hardware configuration of a control unit of a ventilation device according to the first to third embodiments. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A ventilation device according to an embodiment will be described in detail below with reference to the drawings.

[0012] Embodiment 1 FIG. 1 is a schematic diagram showing the configuration of a ventilation device according to the first embodiment. FIG. 1 shows a structure seen when one surface of the ventilation device 100 is seen through. FIG. 2 is a functional block diagram of the ventilation device according to the first embodiment. The ventilation device 100 is embedded and installed in the attic 220. The space above the ceiling 200 is the attic 220, and the space below the ceiling 200 is the room 210. The room 210 is a ventilation target space, and includes a first area 210a which is a first ventilation target area and a second area 210b which is a second ventilation target area. The second ventilation target area is an area different from the first ventilation target area. That is, the room 210 which is a ventilation target space has a plurality of ventilation target areas.

[0013] The ventilation device 100 includes a remote controller 20. The remote controller 20 includes an input interface such as a button switch or a touch panel, and receives input operations of commands for various controls such as the ventilation operation of the ventilation device 100. The remote controller 20 transmits the various commands received by the input interface to a control unit 7, which will be described later. That is, the remote controller 20 can switch the operation of the ventilation device 100 between on and off, switch the ventilation air volume, switch the ventilation mode, set an operation timer, and the like. The remote controller 20 is installed inside the room 210.

[0014] The ventilation device 100 includes a housing 1. The housing 1 has an exhaust port 2 provided on a first surface, a first indoor air inlet 3a provided on a second surface, and a second indoor air inlet 3b provided on a third surface. The exhaust port 2 is an exhaust port that exhausts indoor air drawn into the ventilation device 100 to the outside. The first indoor air inlet 3a and the second indoor air inlet 3b are indoor air inlets 3 through which air from the room 210 is drawn.

[0015] The first indoor air inlet 3a and the second indoor air inlet 3b correspond to a first area 210a and a second area 210b, which are multiple different ventilation target areas in the room 210. Therefore, the ventilation device 100 can individually suck in indoor air from the first area 210a and the second area 210b, which are multiple ventilation target areas in the room 210. When there is no need to distinguish between the first indoor air inlet 3a and the second indoor air inlet 3b, they are referred to as the indoor air inlet 3.

[0016] The exhaust port 2 is connected to the outdoors 230 via an outdoor exhaust duct 9 that leads to the outside of the building. The first indoor air intake 3a is connected to the first area 210a via an indoor exhaust duct 10a that leads to the first area 210a. The second indoor air intake 3b is connected to the second area 210b via an indoor exhaust duct 10b that leads to the second area 210b.

[0017] The housing 1 is provided with an exhaust air duct 8 that connects the first indoor air inlet 3a and the second indoor air inlet 3b with the exhaust port 2. The exhaust air duct 8 is an air duct for exhausting to the outdoors 230 the first return air RA1 which is the indoor air of the first area 210a in the room 210 and the second return air RA2 which is the indoor air of the second area 210b in the room 210.

[0018] The ventilation device 100 has two suction port opening / closing units 4. One of the two suction port opening / closing units 4 provided in the ventilation device 100 is a first suction port opening / closing unit 4a that opens and closes the first indoor air suction port 3a, and the other is a second suction port opening / closing unit 4b that opens and closes the second indoor air suction port 3b. When there is no need to distinguish between the first suction port opening / closing unit 4a and the second suction port opening / closing unit 4b, they are called suction port opening / closing units 4. An opening / closing part such as a damper or a shutter is used for the first suction port opening / closing unit 4a and the second suction port opening / closing unit 4b. In the first embodiment, a case will be described in which the first suction port opening / closing unit 4a and the second suction port opening / closing unit 4b are configured by a damper.

[0019] The ventilation device 100 includes a blower 5 for exhaust. The blower 5 is a blower that generates an exhaust airflow flow from the inlet end to the outlet end of the exhaust airflow duct 8, i.e., an exhaust airflow flow from the first indoor air inlet 3a and the second indoor air inlet 3b to the exhaust outlet 2, and is provided in the exhaust airflow duct 8. The blower 5 constitutes a blowing section that ventilates the indoor air. The blower 5 includes a motor 5a for driving the blower 5. The rotation speed of the motor 5a changes in response to control by the control section 7 described later.

[0020] When the blower 5 is driven, the first return air RA1, which is indoor air in the first area 210a in the room 210, is sucked in through the first indoor air inlet 3a, flows through the exhaust air duct 8, and is exhausted through the exhaust port 2 to the outdoors 230. When the blower 5 is driven, the second return air RA2, which is indoor air in the second area 210b in the room 210, is sucked in through the second indoor air inlet 3b, flows through the exhaust air duct 8, and is exhausted through the exhaust port 2 to the outdoors 230.

[0021] The ventilation device 100 has two dirt amount detection units 6. One of the two dirt amount detection units 6 is a first dirt amount detection unit 6a, and the other is a second dirt amount detection unit 6b. When there is no need to distinguish between the first dirt amount detection unit 6a and the second dirt amount detection unit 6b, they are referred to as dirt amount detection units 6. The first dirt amount detection unit 6a is provided at the first indoor air inlet 3a. The second dirt amount detection unit 6b is provided at the second indoor air inlet 3b.

[0022] The first dirt amount detection unit 6a and the second dirt amount detection unit 6b detect the amount of dirt in the air in the first area 210a and the second area 210b, and transmit information on the amount of dirt in the indoor air, which is the detection result, to the control unit 7 described later. That is, the dirt amount detection unit 6 transmits a signal corresponding to the detected amount of dirt in the indoor air to the control unit 7 described later. Communication between the dirt amount detection unit 6 and the control unit 7 described later may be wireless communication such as infrared communication, Wi-Fi (registered trademark) or Bluetooth (registered trademark), or may be wired communication.

[0023] The first dirt amount detection unit 6a detects the dirt amount of the indoor air in the first area 210a by detecting the dirt amount in the first return air RA1 which is the indoor air in the first area 210a flowing through the first indoor air inlet 3a. The second dirt amount detection unit 6b detects the dirt amount of the indoor air in the second area 210b by detecting the dirt amount in the second return air RA2 which is the indoor air in the second area 210b flowing through the second indoor air inlet 3b.

[0024] The contamination level detection unit 6 detects, for example, the carbon dioxide concentration in the indoor air, which is the contamination level. 2 The dirt amount detection unit 6 is a CO 2 The contamination amount detection unit 6 is not limited to a CO sensor, and a detection device capable of detecting the amount of contamination in the air, such as a PM2.5 sensor or a dust sensor, can be used. 2 The dirt amount detection unit 6 detects the amount of CO 2 Detects the concentration of CO 2 A signal corresponding to the concentration is output to the control unit 7, which will be described later.

[0025] The control unit 7 sets the opening / closing amount of the inlet opening / closing unit 4, the opening / closing time of the inlet opening / closing unit 4, and the air volume of the blower 5 in response to the amount of dirt in the indoor air detected by the dirt amount detection unit 6, and issues operation instructions to the inlet opening / closing unit 4 and the blower 5. In other words, the control unit 7 controls the operation of the ventilation device 100 in response to the signal input from the dirt amount detection unit 6.

[0026] The control unit 7 controls the blower 5 based on the acquired information on the amount of dirt in the indoor air to control the ventilation operation of the ventilation device 100. The control unit 7 acquires the amount of dirt in the indoor air in the first area 210a and the amount of dirt in the indoor air in the second area 210b from the dirt amount detection unit 6. That is, the control unit 7 receives a signal corresponding to the amount of dirt in the indoor air in the first area 210a detected by the first dirt amount detection unit 6a from the first dirt amount detection unit 6a. The control unit 7 also receives a signal corresponding to the amount of dirt in the indoor air in the second area 210b detected by the second dirt amount detection unit 6b from the second dirt amount detection unit 6b.

[0027] Furthermore, the control unit 7 controls the operation and stop of the blower 5, and also controls the air volume of the blower 5, thereby controlling the ventilation operation. That is, the control unit 7 is capable of communicating with the blower 5 via a communication line (not shown), and controls the ventilation air volume by controlling the air volume of the blower 5. The control unit 7 automatically controls the air volume of the blower 5 to change the ventilation air volume, based on the operation mode selected by the user on the remote controller 20.

[0028] Furthermore, the control unit 7 controls the air volume of the blower 5 to change the ventilation air volume based on the amount of dirt in the indoor air in the first area 210a, the amount of dirt in the indoor air in the second area 210b, and a judgment threshold previously set in the control unit 7. That is, the control unit 7 controls the air volume of the blower 5 to change the ventilation air volume based on the magnitude relationship between the amount of dirt in the indoor air in the first area 210a, the amount of dirt in the indoor air in the second area 210b, and the judgment threshold. The judgment threshold is previously set in the control unit 7. The judgment threshold can be changed to an arbitrary value by operating the remote controller 20.

[0029] For example, the control unit 7 receives a signal transmitted from the dirt amount detection unit 6. Then, the control unit 7 changes the ventilation air volume based on the magnitude relationship between the dirt amount indicated by the received signal and a judgment threshold, and controls the operation of the ventilation device 100. That is, the control unit 7 controls the operation of the ventilation device 100 to switch to an operation mode with a different ventilation air volume based on the dirt amount of the indoor air.

[0030] Therefore, the control unit 7 can control the operation of the ventilation device 100 to switch to an operation mode with a different ventilation air volume, based on the amount of contamination of the indoor air in the first area 210a and the amount of contamination of the indoor air in the second area 210b.

[0031] The first suction port opening / closing section 4a, the second suction port opening / closing section 4b, the blower 5, the control section 7 and the exhaust air passage 8 are provided inside the housing 1.

[0032] Next, the operation of the ventilation device 100 according to the first embodiment will be described. FIG. 3 is a flow chart showing the procedure of ventilation operation in the ventilation device according to the first embodiment. FIG. 4 is a diagram showing a condition setting table showing operation control conditions in the ventilation device according to the first embodiment. The control unit 7 controls the opening degree of the intake port opening / closing unit 4 and the air volume of the blower 5 based on any one of the operation control conditions, Condition 1 to Condition 4, set in the condition setting table shown in FIG. 4, to control the exhaust air volume of the ventilation device 100. The condition setting table is stored in advance in the control unit 7.

[0033] The air volume of the blower 5 has two notches, with the larger air volume being a "strong air volume" and the smaller air volume being a "weak air volume." 2 Based on the detection result of the concentration, the opening / closing ratio of the first suction port opening / closing section 4a and the second suction port opening / closing section 4b and the air volume of the blower 5 are set to control the operation of the ventilation device 100.

[0034] In step S10, the user operates the remote controller 20 to turn on the power of the ventilation device 100. This causes power to be supplied to the ventilation device 100, and the CO 2 Concentration detection begins.

[0035] In step S20, the control unit 7 detects the CO 2 In order to detect the concentration, the first suction port opening / closing unit 4a that opens and closes the first indoor air suction port 3a and the second suction port opening / closing unit 4b that opens and closes the second indoor air suction port 3b are controlled to be fully open.

[0036] In step S30, the control unit 7 determines whether or not the stabilization time t1 has elapsed. The stabilization time t1 is a waiting time until the air flowing through the exhaust air duct 8 stabilizes and the only indoor air flowing through the exhaust air duct 8 is the indoor air. After the stabilization time t1 has elapsed, the air that was stagnant in the indoor exhaust ducts 10a, 10b before power was supplied to the ventilation device 100 has been sent to the outdoor 230 side of the dirt amount detection unit 6, and the only air passing through the dirt amount detection unit 6 is the indoor air in the first area 210a and the second area 210b.

[0037] If it is determined that the stable time t1 has elapsed, the result in step S30 is Yes, and the process proceeds to step S40. If it is determined that the stable time t1 has not elapsed, the result in step S30 is No, and step S30 is repeated.

[0038] In step S40, the first contamination amount detection unit 6a detects the amount of CO 2 Concentration of CO 2 The second contamination amount detection unit 6b detects the concentration X1 of the CO 2 Concentration of CO 2 The contamination amount detector 6 detects the concentration X2 of CO 2 The information on the concentrations X1 and X2 is transmitted to the control unit 7.

[0039] The air volume of the blower 5 from step S20 to step S40 may be either a strong air volume or a weak air volume.

[0040] In step S50, the control unit 7 detects the CO 2 Concentration of CO 2 The concentration X1 is compared with the threshold Y1. 2 It is determined whether the concentration X1 is equal to or greater than the threshold Y1. The threshold Y1 is a value that the control unit 7 uses to determine the operation control condition. 2 This is the decision threshold for comparison with the concentration X1.

[0041] CO in the indoor air in the first region 210a 2 If it is determined that the concentration X1 is equal to or greater than the threshold Y1, the result in step S50 is Yes, and the process proceeds to step S60. 2 If it is determined that the concentration X1 is less than the threshold Y1, the result in step S50 is No, and the process proceeds to step S70. 2 When the concentration X1 is equal to or greater than the threshold Y1, it is indicated as "high" and when the concentration X1 is equal to or greater than the threshold Y1, it is indicated as "high". 2 The case where the concentration X1 is less than the threshold Y1 is indicated as "low".

[0042] In step S60, the control unit 7 detects the amount of CO 2 Concentration of CO 2 The concentration X2 is compared with the threshold Y2. 2 It is determined whether the concentration X2 is equal to or greater than the threshold Y2. The threshold Y2 is a value that the control unit 7 uses to determine the operation control condition. 2 This is the decision threshold for comparison with concentration X2.

[0043] Indoor air CO in the second region 210b 2 If the concentration X2 is equal to or greater than the threshold Y2, the answer in step S60 is Yes, and the process proceeds to step S80. 2If the concentration X2 is less than the threshold Y2, the result in step S60 is No, and the process proceeds to step S90. 2 When the concentration X2 is equal to or greater than the threshold Y2, it is indicated as "high" and when the concentration X2 is equal to or greater than the threshold Y2, it is indicated as "high". 2 The case where the concentration X2 is less than the threshold Y2 is indicated as "low."

[0044] In step S80, the control unit 7 determines the operation control condition to be condition 1.

[0045] In step S90, the control unit 7 determines the operation control condition to be condition 2.

[0046] In step S70, the control unit 7 detects the amount of CO 2 Concentration of CO 2 The concentration X2 is compared with the threshold Y2. 2 It is determined whether the concentration X2 is equal to or greater than the threshold Y2. 2 If the concentration X2 is equal to or greater than the threshold Y2, the answer in step S70 is Yes, and the process proceeds to step S100. 2 If the concentration X2 is less than the threshold Y2, the result in step S70 is No, and the process proceeds to step S110.

[0047] In step S100, the control unit 7 determines the operation control condition to be Condition 3.

[0048] In step S110, the control unit 7 determines the operation control condition to be condition 4.

[0049] That is, the control unit 7 controls the CO 2 Concentration and CO 2 According to the concentration, the operation control condition is determined to be one of four operation control conditions, Condition 1 to Condition 4, shown in FIG.

[0050] In step S120, the control unit 7 controls the operation of the ventilation device 100 in response to the operation control condition determined from among conditions 1 to 4. That is, the control unit 7 sets the opening / closing ratio of the first suction port opening / closing unit 4a, the opening / closing ratio of the second suction port opening / closing unit 4b, and the air volume of the blower 5 in response to any one of conditions 1 to 4, and operates the first suction port opening / closing unit 4a, the second suction port opening / closing unit 4b, and the blower 5 under the set conditions.

[0051] Here, each of conditions 1, 2, 3, and 4 shown in the condition setting table shown in FIG. 4 will be described.

[0052] Condition 1 is that the CO 2 Since the concentration is high and ventilation with a large air volume is required, this is an operation control condition for setting the air volume of the blower 5 to a strong air volume. Condition 1 is a state in which ventilation is required in both the first area 210a and the second area 210b, so this is an operation control condition for setting the opening / closing ratio of the first suction port opening / closing section 4a and the opening / closing ratio of the second suction port opening / closing section 4b.

[0053] The opening and closing ratio of the suction port opening / closing unit 4 is, for example, 2 Concentration X1 and CO 2 CO with concentration X2 2 CO concentration in each area 2 For example, the opening / closing ratio is 100% when the intake opening / closing unit 4 is fully open, and the CO 2 Concentration X1=2000ppm, CO 2 If the concentration X2 is 1000 ppm, the opening / closing ratio of the first suction port opening / closing section 4a is 100%×(2000 ppm / 3000 ppm)=67%, and the opening / closing ratio of the second suction port opening / closing section 4b is 100%×(1000 ppm / 3000 ppm)=33%. In this way, the opening degree of the first suction port opening / closing section 4a and the opening / closing ratio of the second suction port opening / closing section 4b are determined, whereby the CO 2 Areas with higher concentrations can be preferentially ventilated.

[0054] Condition 2 is the CO 2Since the concentration is high and ventilation with a large air volume is required, the operation control condition is set to a high air volume for the blower 5. In addition, condition 2 is set to a high air volume for the CO 2 Although the concentration is high, the CO 2 Since the concentration is low, only the first area 210a needs ventilation. Therefore, condition 2 is an operation control condition in which the first air inlet opening / closing section 4a is fully opened and the second air inlet opening / closing section 4b is fully closed or opened / closed at a predetermined ratio. Therefore, in condition 2, the CO 2 The first area 210a, where the concentration is high, can be preferentially ventilated.

[0055] Condition 3 is the CO 2 Since the concentration is high and ventilation with a large air volume is required, this is an operational control condition for setting the air volume of the blower 5 to a high air volume. 2 Although the concentration is low, the CO 2 Since the concentration is high, only the second area 210b needs to be ventilated. Therefore, condition 3 is an operation control condition in which the first suction port opening / closing section 4a is fully closed or at a predetermined opening / closing ratio, and the second suction port opening / closing section 4b is fully opened. Therefore, in condition 3, the CO 2 The second region 210b having a high concentration can be preferentially ventilated.

[0056] Condition 4 is that the CO 2 Since the concentration is low and ventilation is possible with a small air volume, this is an operation control condition in which the air volume of the blower 5 is low. The opening degree of the suction port opening / closing unit 4 may be, for example, 50% for both the first suction port opening / closing unit 4a and the second suction port opening / closing unit 4b. Similarly to condition 1, the CO concentration of the indoor air in each area of ​​the room 210 may be 2 It may be set in accordance with the density ratio.

[0057] In addition, the CO concentration of the indoor air in each area increases or decreases due to the entry and exit of people in the room 210 and the movement of people in the room 210. 2Since the concentration is constantly changing, the CO 2 It is advisable to check the concentration periodically.

[0058] Therefore, in step S130, the control unit 7 determines whether or not the operation time t2 has elapsed. The operation time t2 is the time during which the ventilation device 100 performs the ventilation operation based on any one of the conditions 1 to 4.

[0059] If it is determined that the operation time t2 has elapsed, the result is Yes in step S130, and the process proceeds to step S20. If it is determined that the operation time t2 has not elapsed, the result is No in step S130, and the process repeats step S130. By periodically performing the processes from step S20 to step S120, the CO 2 It is possible to constantly and efficiently reduce the concentration.

[0060] As described above, the ventilation device 100 reduces the amount of CO in the indoor air. 2 The system is equipped with multiple contamination level detection units 6 that detect the concentration of CO in the indoor air based on the detection results of the contamination level detection units 6, and operates according to the flowchart shown in FIG. 2 High concentration spaces and indoor air CO 2 Identify spaces with low CO concentrations and measure indoor air CO 2 It is possible to ventilate with priority given to areas with high concentrations. Furthermore, the ventilation device 100 can control ventilation of the room 210 by a single control unit 7.

[0061] Since the ventilation device 100 is provided with a plurality of dirt amount detection units 6 for detecting the dirt amount of the indoor air in each area, the effects of low cost, no need for a large space, easy installation work, less frequent maintenance, and low power consumption are obtained. Therefore, compared with a case where the ventilation device 100 uses a plurality of ventilation devices to ventilate the room 210, the ventilation device 100 can realize easy control, low cost, space saving, less frequent maintenance, and low power consumption with a simple structure. In addition, the ventilation device 100 can set both the opening and closing amount of the first suction port opening and closing unit 4a and the second suction port opening and closing unit 4b and the air volume of the blower 5 under the control of the control unit 7, so that the ventilation volume required for ventilation of the target space can be finely adjusted.

[0062] The stabilization time t1 may be determined in advance in the control unit 7, or may be arbitrarily set by the remote controller 20 or the like. 2 The change in concentration is calculated as a slope, and if the slope is below a predefined threshold, the CO concentration in the indoor air is considered to be low. 2 The concentration is judged to be stable, and the CO in the indoor air at that time 2 The concentration may be detected.

[0063] In the above, the CO 2 The above explanation assumes that there is one judgment threshold for comparing with the concentration, and that the airflow rate of the blower 5 is set to two notches, a strong airflow rate and a weak airflow rate. 2 The concentration determination threshold and the air volume of the blower 5 may be set to multiple levels. For example, 2 The determination threshold for comparing with the concentration is set to two levels, high and low, and the air volume is set to strong air volume, medium air volume, and weak air volume. 2 The concentration is high, and the CO in the indoor air in the second region 210b 2 If the concentration is low, the air volume may be set to medium.

[0064] In the above description, the opening / closing ratio of the first suction port opening / closing section 4a and the opening / closing ratio of the second suction port opening / closing section 4b are set in accordance with the conditions. 2 Concentration X1 and CO 2 The concentration X2 may be fixed in stages or may be arbitrarily set by the remote controller 20 or the like. For example, 2 Concentration X1 and CO 2 When the concentration X2 is 1000 ppm or less, the opening / closing ratio of the first suction port opening / closing section 4a and the opening / closing ratio of the second suction port opening / closing section 4b are set to 30%. 2 Concentration X1 and CO 2 When the concentration X2 is 1001 ppm or more and 1500 ppm or less, the opening / closing ratio of the first suction port opening / closing unit 4a and the opening / closing ratio of the second suction port opening / closing unit 4b are set to 60%. 2 Concentration X1 and CO 2 When the concentration X2 is 1501 ppm or more, the opening / closing ratio of the first suction port opening / closing section 4a and the second suction port opening / closing section 4b is set to 100%. Note that these conditions are merely examples.

[0065] The ventilation device 100 according to the first embodiment can efficiently reduce air pollution throughout the room with a simple configuration and control.

[0066] Embodiment 2 5 is a schematic diagram showing the configuration of a ventilation device according to embodiment 2. The ventilation device 100 according to embodiment 2 differs from the ventilation device 100 according to embodiment 1 in that it includes a first indoor display unit 21a and a second indoor display unit 21b. The first indoor display unit 21a is installed at a position visible from the first area 210a. The second indoor display unit 21b is installed at a position visible from the second area 210b.

[0067] The first indoor display unit 21a displays the CO 2The first indoor display unit 21a receives the result of the comparison between the concentration X1 and the threshold value Y1 from the control unit 7. The first indoor display unit 21a changes to a display method set in advance in accordance with the received result. For example, the first indoor display unit 21a 2 If the concentration X1 is greater than or equal to the threshold Y1, the CO 2 If the concentration X1 is less than the threshold Y1, the second indoor display unit 21b is turned off. 2 The second indoor display unit 21b receives the result of the comparison between the concentration X2 and the threshold value Y2 from the control unit 7. The second indoor display unit 21b changes to a display method set in advance in accordance with the received result. For example, the second indoor display unit 21b 2 If the concentration X2 is greater than or equal to the threshold Y2, the CO 2 If the density X2 is less than the threshold Y2, the light is turned off.

[0068] According to the ventilation device 100 of the second embodiment, the state of contamination of the air in the room 210 can be visually checked.

[0069] Embodiment 3 6 is a schematic diagram showing the configuration of a ventilation device according to embodiment 3. The ventilation device 100 according to embodiment 3 differs from the ventilation device 100 according to embodiment 2 in that the first indoor display unit 21a and the second indoor display unit 21b are installed on the remote controller 20.

[0070] According to the ventilation device 100 of the third embodiment, it is possible to visually check the air pollution state in the room 210 with the remote controller 20. Moreover, if the remote controller 20 is installed in a space other than the room 210, it is possible to visually check the air pollution state in the room 210 from the other space.

[0071] Next, a hardware configuration of the control unit 7 of the ventilation device 100 according to each of the above embodiments will be described. Fig. 7 is a diagram showing an example of a hardware configuration of the control unit of the ventilation device according to embodiments 1 to 3. Fig. 7 shows a hardware configuration in the case where the function of the control unit 7 is realized by using hardware that executes a program.

[0072] The control unit 7 has a processor 81 that executes various processes, a memory 82 that is an internal memory, and a storage device 83 that stores information. The processor 81 reads out a program stored in the storage device 83 into the memory 82 and executes the program. The condition setting table, the stable time t1, the operating time t2, and the thresholds Y1 and Y2 are stored in the storage device 83.

[0073] The configurations shown in the above embodiments are merely examples of the contents, and may be combined with other known technologies. Parts of the configurations may be omitted or modified without departing from the spirit of the invention. [Explanation of symbols]

[0074] 1 housing, 2 exhaust port, 3 indoor air intake port, 3a first indoor air intake port, 3b second indoor air intake port, 4 intake port opening / closing section, 4a first intake port opening / closing section, 4b second intake port opening / closing section, 5 blower, 5a motor, 6 dirt amount detection section, 6a first dirt amount detection section, 6b second dirt amount detection section, 7 control section, 8 exhaust air duct, 9 outdoor exhaust duct, 10a, 10b indoor exhaust duct, 20 remote controller, 21a first indoor display section, 21b second indoor display section, 81 processor, 82 memory, 83 storage device, 100 ventilation device, 200 ceiling, 210 indoors, 210a first area, 210b second area, 220 attic, 230 outdoors.

Claims

1. A housing provided with a plurality of intake ports and an exhaust port, each of which is provided corresponding to a plurality of different ventilation target areas in a room; a blower disposed within the housing and generating a flow of indoor air from the air inlet to the air outlet; A plurality of suction port opening / closing units that open and close each of the plurality of suction ports; a plurality of dirt amount detection units provided at the plurality of suction ports, each detecting a dirt amount of the indoor air passing through each of the plurality of suction ports; a control unit that controls an opening / closing operation of the intake opening / closing unit and an air volume of the blower based on a dirt amount of the indoor air in each of the plurality of ventilation target areas; Equipped with The ventilation device is characterized in that the suction port opening and closing unit selects the ventilation target area to be ventilated preferentially based on the multiple amounts of dirt, fully opens the suction port opening and closing unit of the ventilation target area to be ventilated preferentially, and opens and closes the suction port opening and closing unit of the other ventilation target areas at a predetermined opening and closing ratio.

2. The ventilation device according to claim 1 , wherein the control unit adjusts an air volume of the blower in response to a detection result of an amount of contamination of the indoor air passing through each of the plurality of air inlets.

3. 3. The ventilation device according to claim 1, further comprising a detection result display unit that displays a detection result of the amount of contamination of the indoor air passing through each of the plurality of air inlets.

4. 4. The ventilation device according to claim 3, further comprising a remote controller, wherein the detection result display unit is provided on the remote controller.

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