Ventilation system and ventilation method

Abstract

To provide a ventilation system capable of reducing energy loss and making an air environment closer to a more comfortable one in a building by comprehensively considering air supply / exhaust environment of the building.SOLUTION: A ventilation system 100 includes: at least one air exhaust device 10 for discharging air from an inner space to an outer space of a building; a plurality of air supply devices 20 for supplying air from the outer space to the inner space of the building; a control section 11 for controlling one or both of the air exhaust device and the air supply devices; and a target air quality acquisition section 113 for acquiring a predetermined target air quality. Each of the air supply devices includes: an air supply sensor 21 for detecting a supply air quality of air to be supplied via the air supply device; and an air supply amount adjustment section 22 for adjusting an amount of air to be supplied via the air supply device. The control section 11 acquires the supply air quality detected by each of the air supply sensors, and controls each of the air supply amount adjustment sections in accordance with a level of a difference between each of the acquired supply air qualities and the target air quality acquired by the target air quality acquisition section.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a ventilation system and a ventilation method. [Background technology]

[0002] In recent years, the Building Standards Act requires that homes be equipped with ventilation equipment capable of ventilating at least 0.5 times per hour. During cooking, more than the above amount of ventilation is achieved through forced ventilation using local ventilation equipment such as range hoods. One problem that can arise when ventilating in this way is that if the temperature of the air taken in from the air supply device during ventilation is significantly different from the temperature of the air being conditioned at room temperature, the air environment in the living space can deteriorate, reducing comfort in daily life. Another problem is that once the air conditioning is impaired, the energy required to recondition the air is required.

[0003] Various techniques have been proposed to address such problems. For example, Patent Document 1 discloses a building ventilation system that can prevent excessive ventilation of other rooms when ventilating a room. In this ventilation system, a ventilator is provided in the kitchen, and multiple air intakes are provided in the kitchen and in the living room that is connected to the kitchen, and an air quality sensor is provided in the living room. This ventilation system adjusts the opening degree of the air intake damper depending on the operation status of the ventilator (automatic or manual operation) and the state of the air quality in the room. Specifically, in manual operation (cooking ventilation), the damper of the kitchen intake is opened and the dampers of the air intakes of each room are controlled to be closed, and in automatic operation (constant ventilation), the damper of the kitchen intake is closed and the dampers of the air intakes of each room are controlled to be opened. In addition, the system is configured to perform automatic operation and open / close control of the dampers of the air intakes of each room depending on the state of the indoor air quality.

[0004] Patent Document 2 discloses a ventilation system that achieves the necessary and sufficient ventilation according to the pollution state of the indoor air in each room with a minimum of equipment. In this ventilation system, each room in the house is equipped with an intake damper with a variable intake volume that supplies outside air into the room, a sensor that detects the pollution state of the air quality in each room, and a ventilation fan at the end of the passageway leading to each room that centrally exhausts the exhaust air from each room. Based on information transferred from the sensor, this ventilation system adjusts the opening of the intake damper for each room and adjusts the exhaust volume of the ventilation fan. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 09-152152 [Patent Document 2] Japanese Patent Application Publication No. 07-103526 Summary of the Invention [Problem to be solved by the invention]

[0006] In the above conventional technology, the amount of air supplied is adjusted based on information on indoor air quality and information on the operation of the ventilation device, thereby maintaining comfort and reducing energy loss. Here, the air supplied from the air supply device varies depending on the weather, season, installation location (south or north, first or second floor, etc.), and surrounding environment (neighboring houses are nearby and odors can enter), so simply adjusting the amount of air supplied to each room according to the indoor air quality conditions, as in the above conventional technology, is not enough to maintain comfort. For example, in the case of the above conventional technology, if pollution is detected in a room on the south side, which is hot and humid in summer, hot and humid air will be supplied from the room on the south side, even if it increases the air conditioning load. For this reason, in order to achieve a more comfortable air environment, it is necessary to control the ventilation system by comprehensively considering the air supply and exhaust environment of the building, such as the number and installation location of air supply devices, and the number and capacity of exhaust devices, and a solution that can approach a more comfortable air environment with less energy loss was required.

[0007] Therefore, the present invention has been devised in consideration of these circumstances, and provides a ventilation system that takes into consideration the air intake and exhaust environment of the building comprehensively and aims to create a more comfortable air environment within the building with less energy loss. [Means for solving the problem]

[0008] In order to solve the above problems, a ventilation system is provided which includes at least one exhaust device that exhausts air from an internal space of a building to an external space, a plurality of intake devices that supply air from the external space of the building to the internal space, a control unit that controls one or both of the exhaust device and the intake device, and a target air quality acquisition unit that acquires a predetermined target air quality, wherein each of the intake devices includes an intake air sensor that detects the intake air quality of the air supplied through the intake device, and an intake air volume adjustment unit that adjusts the amount of air supplied through the intake device, and the control unit acquires the intake air quality detected by each of the intake air sensors, and controls each intake air volume adjustment unit depending on the magnitude of the difference between each acquired intake air quality and the target air quality acquired by the target air quality acquisition unit. According to this, by controlling the amount of air supplied through each air supply device depending on the magnitude of the difference between the supply air quality of the air supplied through the air supply device and a predetermined target air quality, a ventilation system can be provided which takes into consideration the supply and exhaust environment of the building comprehensively and can achieve a more comfortable air environment within the building with less energy loss.

[0009] Furthermore, the control unit may be characterized by controlling each air supply volume adjustment unit in accordance with conditions regarding increasing or decreasing the air supply volume in the air supply device that are set based on a predetermined value calculated from the air supply quality detected by all or some of the air supply sensors. According to this, by controlling the air supply volume of each air supply device according to conditions such as which air supply device to increase the air supply volume from, it is possible to reduce energy loss and achieve a more comfortable air environment.

[0010] Furthermore, the building may further include an internal space air quality sensor that detects the air quality in the internal space, and the control unit may acquire the internal space air quality detected by the internal space air quality sensor, and control each supply air volume adjustment unit based on the acquired internal space air quality, the target air quality, and each supply air quality. According to this, by controlling the amount of air supplied by each air supply device taking into account not only the supply air quality and the target air quality but also the internal space air quality, it is possible to more accurately approach a comfortable air environment.

[0011] Furthermore, the control unit may be characterized in that it controls each supply air amount adjustment unit in accordance with an approximate deviation judgment between the target air quality and the internal space air quality performed based on the magnitude of the difference between the target air quality and the internal space air quality. According to this, by controlling the air supply volume of each air supply device according to an approximate deviation judgment between the target air quality and the air quality of the internal space, which is made based on the magnitude of the difference between the target air quality and the air quality of the internal space, it is possible to achieve a more comfortable air environment with less energy loss.

[0012] Furthermore, when the control unit determines in the approximate deviation judgment that the difference between the target air quality and the air quality of the internal space is less than a predetermined difference, it controls each supply air volume adjustment unit so that the supply volume is increased from the air supply device with the smaller difference between the target air quality and the air supply quality, and when the control unit determines in the approximate deviation judgment that the difference between the target air quality and the air quality of the internal space is greater than or equal to a predetermined difference, it may control each supply air volume adjustment unit so that the supply volume is increased from the air supply device with the larger difference between the target air quality and the air supply quality. According to this, when the difference between the target air quality and the air quality in the internal space is less than a specified difference, the air supply volume is controlled to be increased starting with the air supply device with the smaller difference, and when the difference is greater than the specified difference, the air supply volume is controlled to be increased starting with the air supply device with the larger difference.In this way, in the case of approximation, the target air quality can be approached without disturbing the temperature and humidity balance in the room, and in the case of deviation, priority is given to the air supply from the more advantageous air supply device, making it easier to approach the target temperature and humidity, and approaching a more comfortable air environment with less energy loss that takes into consideration the building's air supply and exhaust environment as a whole.

[0013] Furthermore, the building may further include a pressure difference detection unit that detects the pressure difference between the interior space of the building and the exterior space of the building, and the control unit may be characterized in that when the pressure difference detection unit detects a predetermined negative pressure state, it controls each air supply volume adjustment unit to increase the air supply volume in an air supply device where there is room to increase the air supply volume. According to this, in the case of a specified negative pressure state, by controlling the air supply volume to be increased in an air supply system where there is room to increase the air supply volume, the negative pressure can be eliminated while increasing the air supply volume from the air supply system that is advantageous for the target air quality.

[0014] Furthermore, the control unit may be characterized in that it controls each of the supply air amount adjustment units so that the sum of the exhaust amounts of the exhaust devices and the sum of the supply air amounts of the plurality of air supply devices become equal. According to this, by controlling the air supply volume of each air intake device according to the magnitude of the difference between the target air quality and each intake air quality so that the sum of the exhaust volume and the intake volume is equal, it is possible to approach a comfortable air environment while ensuring the necessary exhaust volume.

[0015] Furthermore, the exhaust device may be capable of changing an exhaust volume, and the control unit may be characterized in that it controls the sum of the air supply volumes of the multiple air supply devices so that the sum is equal to the changed exhaust volume. According to this, by controlling the total amount of intake air so that it is equal to the changed amount of exhaust air, it is possible to approach a comfortable air environment while always maintaining an appropriate balance between intake and exhaust air.

[0016] In order to solve the above problems, a ventilation method is provided which controls at least one exhaust device which exhausts air from the internal space of a building to the external space, and one or both of a plurality of air supply devices which supply air from the external space of the building to the internal space, and which acquires the supply air quality detected by each of the supply air sensors which detect the supply air quality of the air supplied through the supply air device, and controls the amount of air supplied through each of the supply air devices depending on the magnitude of the difference between each of the acquired supply air qualities and a predetermined target air quality. According to this, by controlling the amount of air supplied through each air supply device depending on the magnitude of the difference between the supply air quality of the air supplied through the air supply device and a predetermined target air quality, a ventilation method can be provided which takes into consideration the supply and exhaust environment of the building comprehensively and achieves a more comfortable air environment within the building with less energy loss. Effect of the Invention

[0017] As described above, according to the present invention, it is possible to provide a ventilation system and a ventilation method that take into consideration the air intake and exhaust environment of a building comprehensively and aims to reduce energy loss and achieve a more comfortable air environment within the building. [Brief description of the drawings]

[0018] [Figure 1] 1 is a house floor plan showing an example in which a ventilation system according to a first embodiment of the present invention is arranged in a house. [Diagram 2] FIG. 1 is a block diagram of a ventilation system according to a first embodiment of the present invention. [Diagram 3] FIG. 2 is a diagram showing a functional flow of the ventilation system according to the first embodiment of the present invention. [Figure 4] 4 is a flowchart showing control of a range hood in the ventilation system of the first embodiment according to the present invention. [Diagram 5] 5 is a flowchart showing control for determining the sequence of opening rates of air supply devices in control of range hoods in the ventilation system of the first embodiment of the present invention. [Figure 6] FIG. 2 is a diagram for explaining discomfort indexes and the like used in controlling a range hood in the ventilation system of the first embodiment according to the present invention. [Figure 7] FIG. 11 is a diagram for explaining the conditions for ranking the opening rate of the air supply device based on the discomfort index in the control of the range hood in the ventilation system of the first embodiment of the present invention. [Figure 8] FIG. 13 is a diagram for explaining the conditions for ranking the opening rate of the air supply device based on approximate conditions in the control of the range hood in the ventilation system of the first embodiment of the present invention. [Figure 9] FIG. 13 is a diagram for explaining the conditions for ranking the opening rate of the air intake device based on the deviation conditions in the control of the range hood in the ventilation system of the first embodiment of the present invention. [Figure 10] 5 is a flowchart showing control for determining an opening ratio of an air supply device in control of a range hood in the ventilation system of the first embodiment of the present invention. [Figure 11] FIG. 4 is a diagram for explaining ranking and opening ratio in the control of the range hood in the ventilation system of the first embodiment according to the present invention. [Figure 12] A figure showing the transition of the opening rate and sequence of the air supply device in the control of the range hood in the ventilation system of the first embodiment of the present invention. [Figure 13] FIG. 2 is a diagram showing a user interface of a home controller in the ventilation system of the first embodiment according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, embodiments of the present invention will be described with reference to the drawings. <First Example> A ventilation system 100 in this embodiment will be described with reference to Figures 1 to 13. The ventilation system 100 includes an exhaust device and an air supply device installed in a typical house as shown in Figure 1. Here, for convenience, this figure shows one dwelling unit of an apartment building, but it may be a detached house, and is not limited to a residential building, and may be a commercial building or a factory building.

[0020] In this dwelling, a range hood (RH) is installed in the kitchen as an exhaust device that exhausts air from the internal space IS of the building HS to the external space OS, and an air intake (1-5) is installed in each room as an air supply device that supplies air from the external space OS of the building HS to the internal space IS. Air intake 1 and air intake 2 are installed facing south, air intake 3 and air intake 4 facing west, and air intake 5 facing north. Therefore, in Japan, since the south side of the building HS is exposed to sunlight and the temperature is relatively higher than the north side, the relationship of the temperature of the air supplied from each air intake can be assumed as follows: Air intake 1 ≒ Air intake 2 > Air intake 3 ≧ Air intake 4 > Air intake 5.

[0021] In addition, although this figure shows an air conditioner (air conditioning equipment), if the air conditioner has a ventilation function (air supply and exhaust function), it is considered to be a type of exhaust device and air supply device. In this specification, the air conditioner (air conditioning equipment) is not considered to have a ventilation function.

[0022] 2, the ventilation system 100 includes a range hood 10 as an exhaust device, an air supply device 20 provided at an air supply port, a temperature and humidity sensor 30 as a sensor for detecting the air quality of the internal space IS, and a pressure sensor 40 as a pressure difference detection unit for detecting the pressure difference between the internal space IS and the external space OS. In addition, the figure shows air quality-related devices in one dwelling unit, such as an air conditioner AC, a room ventilator VF, and an air purifier AP, as well as a home controller control unit 50 in a home controller HC that controls all of these air quality-related devices, as linked devices, although they are not included in the ventilation system 100.

[0023] In this specification, the internal space IS typically refers to an indoor space or a space inside a building that is separated from the external space OS by walls, floors, ceilings, windows, etc., and the external space OS refers to the space surrounding the internal space IS. The internal space IS usually refers to a space as a unit for controlling ventilation, such as a single dwelling unit in an apartment building or a single room in a commercial building, but in the case of a large-scale commercial building, these units may be combined and ventilation controlled as a single internal space IS. Although the internal space IS and the external space OS are separated by a certain boundary and the air flow between them is somewhat restricted, in reality, there is no air flow between them except for the exhaust device and the air supply device (for example, gaps in walls and windows). However, in this specification, these are treated as negligible in terms of ventilation.

[0024] In addition, in this specification, air quality refers to the state of air in a space, and refers to the state of the temperature, humidity, and ratio of components of the air. Air quality-related equipment refers to equipment that acts on such air quality, and refers to equipment that changes or maintains the temperature and humidity of the air in the space, and the ratio of components (including suspended dust, etc.) contained in the mixed gas called air, and generates airflow to move the air. In addition, the temperature and humidity sensor 30 that detects air quality may not only detect temperature and humidity, but also have a function to detect CO2, smoke, etc. In addition, the pressure sensor 40 is not particularly limited as long as it detects the pressure difference between the internal space IS and the external space OS, and may be a sensor that measures air pressure, a sensor that measures differential pressure, a sensor that measures negative pressure, etc.

[0025] The range hood 10 is typically installed in a kitchen and is a device that has the function of exhausting oily smoke together with air to the outdoors. The range hood 10 in this specification is not a simultaneous intake and exhaust type but has only an exhaust function, but may have an intake function at the same time as exhaust. In that case, the intake function functions as a type of air intake device 20, and the total intake air volume of the air intake devices 20 (five in this embodiment) plus the intake air volume by the air intake function of the range hood 10 becomes the total intake air volume from the external space OS to the internal space IS. In this embodiment, it is assumed that the range hood 10 mainly functions as an exhaust device that exhausts air from the internal space IS to the external space OS according to the present invention, but it is also assumed that the range hood 10 and the living room ventilation fan VF operate simultaneously as exhaust devices. In this case, the total exhaust air volume as an exhaust device is the sum of the exhaust air volume of the range hood 10 and the exhaust air volume of the living room ventilation fan VF.

[0026] The range hood 10 includes a range hood control unit 11, an exhaust fan 12, and other known components (not shown) that are typically included in a range hood. The range hood control unit 11 includes: The device is equipped with an exhaust air volume control unit 111 that drives the exhaust fan 12 to control the exhaust air volume, an RH communication unit 116 that communicates to link with other devices such as the air supply device 20, an air supply volume control unit 112 that controls the air supply volume of the air supply device 20 via the RH communication unit 116, a target air quality acquisition unit 113 that acquires the target air quality from the home controller control unit 50 via the RH communication unit 116, a judgment processing unit 114 that makes judgments and processes to determine the air supply volume of the air supply device 20, and an input unit 115 that accepts detection values ​​detected by sensors such as the temperature and humidity sensor 30 and the pressure sensor 40, and is composed of a so-called microprocessor in which these functions are implemented.

[0027] The RH communication unit 116 performs known short-range wireless communication or infrared communication to communicate with relatively nearby devices in the internal space IS. It communicates with the AS communication unit 23 of the air supply device 20 and the HC communication unit 54 of the home controller control unit 50, which have the same function, to send and receive control signals and data.

[0028] The input unit 115 is a port that receives detection values ​​from the temperature and humidity sensor 30 and the pressure sensor 40, and these sensors are connected by wires to the input unit 115. Assuming that the temperature and humidity sensor 30 and the pressure sensor 40 have a communication function, the information obtained by the input unit 115 may be obtained via the RH communication unit 116.

[0029] The target air quality acquisition unit 113 acquires the target air quality (target air quality) in the internal space IS, which is preset in the target air quality setting unit 52 of the home controller control unit 50, as data via the HC communication unit 54 and the RH communication unit 116. The target air quality is preset by a user interface displayed on the display unit 53 of the home controller control unit 50 as shown in FIG. 13. In the example shown in this figure, the target air quality is set to 28°C as a temperature. In the home controller control unit 50, the equipment control unit 51 controls air quality-related equipment such as the air conditioner AC for cooling based on this setting. The target air quality includes not only those set by the user but also those preset in the ventilation system 100. For example, the ventilation system 100 may have a discomfort index of 65 to 69 (comfortable), which will be described later, as a setting value for the target air quality, and the air supply devices 20 may be controlled to be ranked in order starting from the one closest to this 65 to 69.

[0030] The exhaust airflow control unit 111 can change the exhaust volume by controlling the drive of the exhaust fan 12, and can also perform fine control of the exhaust volume to maintain a balance with the supply air volume, including gradually changing the exhaust volume according to the cooking situation, such as general strong, medium, and weak. The exhaust airflow control unit 111 can control the exhaust volume by controlling the rotation speed of the exhaust fan 12, which has a preset exhaust volume based on the rotation speed, or the range hood 10 may be equipped with a flow meter (not shown) for the exhaust volume, and the rotation control may be performed based on the actual exhaust volume fed back from the flow meter, thereby performing more accurate exhaust airflow control. Conversely, the exhaust airflow control unit 111 may preferentially maintain the exhaust airflow set by the user, and control only one of the supply airflow control units 112 to balance the exhaust volume and the supply air volume.

[0031] The air supply amount control unit 112 controls the amount of air supply to each of the air supply devices 20 via the RH communication unit 116 and the AS communication unit 23. Each air supply device 20 includes an air supply sensor 21 that detects the quality of the air supplied through the air supply device 20, an air supply damper 22 that adjusts the amount of air supplied through the air supply device 20, and an AS communication unit 23. The air supply sensor 21 has a function similar to that of the temperature and humidity sensor 30, and detects the quality of the air supply passing through the air supply device 20. The air supply damper 22 determines the amount of air supply by controlling the opening ratio by changing the angle of the damper (or louver) using a motor. When the air supply device 20 is installed at the air supply port, if the opening ratio is 100%, the amount of air supply is approximately the same as the opening area of ​​the air supply port, and if the damper is closed, i.e., the opening ratio is 0%, the amount of air supply is zero.

[0032] The intake damper 22 functions as an intake air amount adjustment unit that adjusts the amount of air supplied through the intake device 20, but the intake air amount adjustment unit may not only adjust the intake air amount by a damper (by natural intake), but may also be provided with a fan to forcibly supply air. In this case, the intake air amount adjustment unit controls the intake air amount by controlling the rotation speed of the fan. Also, the intake air amount can be adjusted by the opening ratio of the intake air damper 22 and the rotation speed of the fan, but the intake device 20 may be provided with an intake air amount flow meter (not shown), and the opening ratio and rotation control may be performed based on the actual intake air amount fed back from the flow meter to perform more accurate intake air amount control.

[0033] The determination processing unit 114 performs determination and processing for determining the amount of air supplied by the air supply device 20. As shown in Fig. 3, the range hood control unit 11 (determination processing unit 114) acquires supply air temperature and humidity information detected by the air supply sensor 21 of each air supply device 20, compares the supply air temperature and humidity information with the target air quality (target temperature and humidity information) acquired by the target air quality acquisition unit 113, performs determination and processing, and enables the supply air amount control unit 112 to control each supply air damper 22 by issuing a damper opening rate command depending on the magnitude of the difference.

[0034] The determination processing unit 114 acquires the supply air quality detected by each of the supply air sensors 21, and controls each supply air damper 22 depending on the magnitude of the difference between each acquired supply air quality and the target air quality acquired by the target air quality acquisition unit 113. This makes it possible to provide a ventilation system 100 that takes into consideration the supply and exhaust environment of the building HS comprehensively and can achieve a more comfortable air environment with less energy loss within the building HS. The processing of the range hood control unit 11 will be described in detail later.

[0035] In this embodiment, an example is shown in which the air supply amount control unit 112, the judgment processing unit 114, and the input unit 115 are included in the range hood control unit 11, but the present invention is not limited to this, and these functions may be included in the home controller control unit 50. Conversely, the range hood control unit 11 may include a function included in the home controller control unit 50 (for example, a target air quality setting unit).

[0036] The processing of the range hood control unit 11 will be described with reference to Fig. 4 to Fig. 12. In S100, the range hood control unit 11 acquires the exhaust air volume (strong, medium, weak, etc.) by the exhaust fan 12 according to the cooking situation obtained from the operation of the input switch (not shown) provided on the range hood 10 or the operation of the remote control (not shown). In S102, the range hood control unit 11 acquires the air quality such as temperature and humidity detected by the air supply sensor 21 of each air supply device 20 via the RH communication unit 116, and the input unit 115 acquires the air quality such as temperature and humidity detected by the temperature and humidity sensor 30 and the pressure sensor 40, and the pressure difference between the internal space and the external space. In S104, the range hood control unit 11 (target air quality acquisition unit 113) acquires the target air quality (target temperature and humidity) from the home controller control unit 50 via the RH communication unit 116. The acquired data includes data indicating the target air quality (target temperature and humidity) and data indicating that the target air quality (target temperature and humidity) is not set (off), and these (target temperature and humidity or target temperature and humidity setting off) are confirmed here. Next, in S106, the range hood control unit 11 (exhaust airflow control unit 111) sets the exhaust fan 12 to be controlled with the exhaust airflow acquired in S100.

[0037] In S200, the range hood control unit 11 determines the rank of the air supply devices 20 based on the detection values ​​acquired in S102. As shown in Fig. 5, in S202, the range hood control unit 11 checks whether the exhaust fan 12 is operating, and if it is not operating, ends the process without performing the following steps. If it is operating, in S204, the range hood control unit 11 (determination processing unit 114) calculates the average values ​​of the temperature and humidity of the supply air from the supply air sensor 21, and further calculates a discomfort index based on the average values.

[0038] For example, FIG. 6 shows that the temperatures at intake ports 1 and 2, which are assumed to have a relatively high intake air temperature, are 30°C and 31°C, the temperature at intake port 5, which is assumed to have a relatively low intake air temperature, is 27°C, and the temperatures at intake ports 3 and 4, which are assumed to have intermediate temperatures, are 29°C and 27.5°C. Similarly, the intake air humidity is 68% at intake port 1, 70% at intake port 2, 67% at intake port 3, 65% at intake port 4, and 60% at intake port 5. The average values ​​obtained from these temperatures and humidities are 28.9°C and 66%, respectively. The discomfort index is calculated from this average value to be 77. There are several ways to calculate the discomfort index, but for example, it is calculated using the following formula. Discomfort index = 0.81 x temperature + 0.01 x relative humidity (0.99 x temperature - 14.3) + 46.3

[0039] Furthermore, as shown in Figure 7, people generally feel cold when the discomfort index is 54 to 59, normal when it is 60 to 69, and hot when it is 70 to 98. When taking in outside air from the exterior space OS to the interior space IS and supplying it, if the environment is such that people in the interior space IS feel cold (for example, in winter), it can be said that supplying outside air with a relatively higher temperature and humidity is advantageous in bringing the interior space IS closer to an environment in which people feel comfortable.

[0040] Conversely, when supplying air, when the environment is such that the people in the internal space IS feel hot (for example, in summer), it can be said that it is advantageous to supply outside air with a relatively low temperature and humidity in order to bring the internal space IS closer to an environment in which people feel comfortable. Also, when supplying air, when the environment is such that the people in the internal space IS feel neither hot nor cold (normal) (for example, in spring or autumn), it can be said that it is advantageous to supply outside air with an intermediate temperature and humidity, since this can avoid disturbing the environment of the internal space IS.

[0041] Based on this concept, in S206, the range hood control unit 11 (determination processing unit 114) sets conditions for ranking the amount of outside air that will be supplied from each of the multiple air supply devices 20 located on the north or south side of the building HS. In other words, the range hood control unit 11 controls the opening rate of each air supply damper 22 in accordance with the ranking conditions for increasing or decreasing the amount of air supply in the air supply devices 20, which are set based on a predetermined value calculated from the supply air quality detected by the air supply sensor 21 of each air supply device 20.

[0042] In the above example, the predetermined value is the simple average of the detection values ​​of the air supply sensors 21 and the discomfort index, but as another example, a weighted average or median may be used instead of the simple average of the detection values, or another index indicating physical sensation or comfort (such as the sensible temperature that does not take wind speed into account) may be used instead of the discomfort index. Also, while the predetermined value is determined in principle from the air quality detected by the air supply sensors 21 of all the air supply devices 20 installed in the building HS, the predetermined value may be calculated from the supply air quality detected by the air supply sensors 21 of some of the air supply devices 20.

[0043] For example, there may be cases where the intake damper 22 of the air intake device 20 is always closed, where some of the air intake sensors 21 are malfunctioning and using that information in the calculation makes it impossible to accurately obtain the specified value, or where the building environment is such that information taken from some of the air intake sensors 21 is closer to the outdoor air conditions than taking an average of all of them. In this way, by controlling the air intake volume of each air intake device 20 according to conditions such as which air intake device 20 to increase the air intake volume from, and by giving priority to advantageous outdoor air, it is possible to quickly approach a more comfortable air environment with less energy loss. The specified value may also be calculated directly as a discomfort index for each air intake device 20.

[0044] Next, in S208, the range hood control unit 11 confirms that the target temperature and humidity obtained in S104 have been set, and if they have not been set, in S218, it determines the order of the air supply amounts of the air supply devices 20 based only on the above-mentioned ranked conditions. For example, in the case of the example shown in Fig. 6, the discomfort index is 77, and it is advantageous to supply outside air with a low temperature and humidity in order to achieve the purpose, so the range hood control unit 11 controls the opening rate of the air supply damper 22 of the air supply device 20 installed at air supply port 5 to be the largest, and the opening rates of the air supply dampers 22 to be smaller in the order of air supply port 4, air supply port 3, air supply port 1, and air supply port 2.

[0045] If the target temperature and humidity are appropriately set, the range hood control unit 11 (determination processing unit 114) calculates in S210 the difference between the target temperature and humidity and the indoor temperature and humidity of the internal space IS detected by the temperature and humidity sensor 30. The range hood control unit 11 also calculates in S212 the difference between the target temperature and humidity and the supply air temperature and humidity detected by each supply air sensor 21. In S214, the range hood control unit 11 checks whether the difference between the target temperature and humidity and the indoor temperature and humidity is less than ±1° C. to perform an approximation deviation judgment. If the difference is less than ±1° C., the range hood control unit 11 determines in S216 the order of the opening rates of the supply air dampers 22 of each air supply device 20 based on the approximation conditions.

[0046] Furthermore, if the difference is not less than ±1° C., in S220, the range hood control unit 11 determines the order of the opening rates of the supply air dampers 22 of each air supply device 20 based on the deviation condition. In this way, when the target temperature and humidity are set appropriately, the range hood control unit 11 controls the supply air dampers 22 of each air supply device 20 based on the indoor temperature and humidity, the target temperature and humidity, and the temperature and humidity of each supply air. This makes it possible to more accurately approach a comfortable air environment.

[0047] Here, referring to Fig. 8, the ranking of the opening ratios of the intake dampers 22 of the air intake devices 20 based on the approximated conditions will be specifically described. In the example shown in this figure, the ranking conditions set in S206 will be described as being advantageous to supply outside air with a lower temperature and humidity, assuming a summer season. In the table at the top of this figure, the target temperature and humidity are 28°C and 55%, the indoor temperature and humidity are 28.5°C and 65%, and the difference between the target temperature and humidity and the indoor temperature and humidity is +0.5°C and +15%. Since the difference between the two is less than ±1°C, the ranking will be performed based on the approximated conditions. Under the ranking conditions for approximation, as shown in the table in the middle of this figure, the ranking is performed so that the opening rate of the intake air damper 22 increases in the order of the difference between the supply air temperature and humidity supplied by each air supply device 20 and the target temperature and humidity, as shown in the table in the middle of this figure.Also, if the difference is the same, the ranking is performed so that the opening rate of the intake air damper 22 increases in the order of the most advantageous way to supply air, i.e., the order of the lowest temperature and humidity.

[0048] A more detailed explanation will be given with reference to the table at the bottom of the figure. In this table, the temperatures of the air supplied from the air supply ports 1 to 5 are 30°C, 29.5°C, 29°C, 26.5°C, and 26°C, respectively, and the differences from these target temperatures are +2°C, +1.5°C, +1°C, -1.5°C, and -2°C. According to the approximate conditions, the range hood control unit 11 controls the opening ratio of the air supply damper 22 of the air supply device 20 of the air supply port 3, which has the smallest difference, to be the largest, the opening ratio of the air supply damper 22 of the air supply device 20 of the air supply port 2 and the air supply port 4, which has the next smallest difference, to be relatively small, and the opening ratio of the air supply damper 22 of the air supply device 20 of the air supply port 1 and the air supply port 5, which has the next smallest difference (i.e., the largest difference among them), to be further small.

[0049] Note that the difference between the target temperature and the air intakes 2 and 4, and between the air intakes 1 and 5, is the same. However, when the difference between the target temperature and the air intakes 2 and 4 is the same, the opening rate of the air intake damper 22 increases in the order of lower temperature. Therefore, the range hood control unit 11 (determination processing unit 114) controls the opening rate of each of the air intake dampers 22 for the air intakes 1 to 5 so that the opening rate of the air intake damper 22 for the air intake 3 is the largest, followed by the opening rates for the air intake 4, the air intake 2, the air intake 5, and the air intake 1, in that order.

[0050] In this way, when the range hood control unit 11 determines in the approximate deviation judgment that the difference between the target air quality and the air quality of the internal space IS is less than a predetermined difference (in this example, ±1°C), it controls the opening ratio of each intake air damper 22 so that the amount of air supplied from the air supply device 20 with the smaller difference between the target air quality and the intake air quality is increased. Note that in this embodiment, the judgment is made based on whether the difference between the target temperature and humidity and the indoor temperature and humidity is less than ±1°C, but it goes without saying that this is not limited to this. For example, this may be the case in an internal space (such as a large space in a factory) where a relatively large difference is acceptable.

[0051] Also, referring to FIG. 9, the sequential ranking of the opening rate of the intake air damper 22 of each air intake device 20 based on the deviation condition will be specifically described. In the example in this figure, the sequential ranking conditions set in S206 will be described as being advantageous to supply outdoor air with a higher temperature and humidity, assuming winter. In the table in the upper part of this figure, the target temperature and humidity are 20°C and 50%, the indoor temperature and humidity are 16°C and 40%, and the difference between the target temperature and humidity and the indoor temperature and humidity is -4°C and -10%. In this case, the difference between the two is ±1°C or more, so sequential ranking is performed based on the deviation condition. In the sequential ranking condition in the deviation condition, as shown in the table in the middle part of this figure, sequential ranking is performed so that the opening rate of the intake air damper 22 increases in the order of the difference between the intake temperature and humidity supplied by each air intake device 20 and the target temperature and humidity in the advantageous direction.

[0052] A more detailed explanation will be given with reference to the table at the bottom of the figure. In this table, the temperatures of the air supplied from the air supply ports 1 to 5 are 22°C, 21°C, 19°C, 15°C, and 14°C, respectively, and the differences from the target temperatures are +2°C, +1°C, -1°C, -5°C, and -6°C. According to the deviation condition, the range hood control unit 11 controls the opening ratio of the air supply damper 22 of the air supply device 20 of the air supply port 1, which has the largest difference in the advantageous direction, to be the largest, and controls the opening ratio of the air supply damper 22 of the air supply device 20 of the air supply port 2, which has the next largest difference in the advantageous direction, to be smaller in that order, followed by the air supply port 3, the air supply port 4, and the air supply port 5. In this way, when the range hood control unit 11 determines in the approximate deviation judgment that the difference between the target air quality and the air quality of the internal space IS is greater than or equal to a predetermined difference, it controls each supply air damper 22 so that the amount of air supplied from the air supply device 20 where the difference between the target air quality and the supply air quality is greater in the favorable direction is increased.

[0053] In this way, when the difference between the target air quality and the air quality in the internal space is less than a specified difference, the air supply volume is controlled to increase starting from the air supply device 20 with the smaller difference, and when the difference is greater than the specified difference, the air supply volume is controlled to increase starting from the air supply device 20 with the largest difference in the advantageous direction.In this way, in the case of approximation, the target air quality can be approached without disturbing the temperature and humidity balance in the room, and in the case of deviation, priority is given to the air supply from the advantageous air supply device, making it easier to approach the target temperature and humidity more quickly, and approaching a more comfortable air environment with less energy loss that takes into consideration the air supply and exhaust environment of the building HS as a whole.

[0054] As described above, the range hood control unit 11 performs an approximate deviation judgment between the target air quality and the air quality of the internal space based on the magnitude of the difference between the target air quality and the air quality of the internal space, and controls the air supply damper 22 of each air supply device 20 according to the judgment. By appropriately controlling the air supply amount of each air supply device according to the difference between the current air quality of the internal space IS and the target air quality, it is possible to quickly approach a more comfortable air environment with less energy loss.

[0055] After determining the order of the air supply devices 20 in S200, the range hood control unit 11 performs an air supply opening ratio determination process in S300 (FIG. 4). The air supply opening ratio determination process will be described with reference to FIG. 10. In S302, the range hood control unit 11 obtains exhaust volume information at that time of the exhaust fan 12 operating under the control of the exhaust air volume control unit 111 and exhaust volume information at that time of the living room ventilation fan VF, and sets the total opening ratio of the air supply dampers 22 of each air supply device 20 based on the sum of the exhaust air volumes of both.

[0056] For example, as shown in the upper table of Figure 11, at time point No. 3, the exhaust air volume of the room ventilation fan VF is 25 m 3 / h, the exhaust air volume of range hood 10 is 200 m 3 / h (equivalent to "weak" airflow), and the total exhaust airflow is 225 m 3 / h. The opening ratio here is a value in which the opening ratio is zero when the intake damper 22 is fully closed and 10 when it is fully open. For an intake device 20 installed in an intake port of 150φ, the opening area when the intake damper 22 is fully open is 0.02 m. 2 If so, the total opening ratio of the air intake device 20 corresponding to this total exhaust air volume is 19.

[0057] The total aperture ratio can be calculated as follows, for example, but is not limited to this and can be calculated as appropriate. The total aperture ratio (total opening area of ​​the air intakes of the building) can be set in various ways taking into consideration the layout of the interior of the building, the ventilation route, the performance of the blower (air volume-static pressure characteristics), the building gap area, the building insulation performance, etc., but for convenience, the total aperture ratio will be explained as "19". When the total aperture ratio is "19", the total opening area of ​​the air intakes of the building is 0.038 m 2 (19×0.002m 2) of the total opening area. With a typical ventilation system for a typical house as shown in Fig. 1, this opening area is sufficient to provide the ventilation required by law. In this embodiment, the total opening area is set to a range of "19" for the total opening area of ​​the five air supply devices, allowing adjustment of the air supply balance, for example, an opening rate of 5 (a large opening area is assigned with a 50% opening rate), an opening rate of 3 (a medium opening area is assigned with a 30% opening rate), or an opening rate of 1 (a small opening area is assigned with a 10% opening rate).

[0058] Next, in S304, the range hood control unit 11 acquires the sequence information of each air supply device 20 determined in S200. For example, as shown in the table in the lower part of Fig. 11, the acquired sequence has the highest opening rate of the air supply damper 22 of the air supply device 20 of air supply port 1, followed by air supply port 2, air supply port 3, air supply port 4, and air supply port 5 in that order. Next, in S306, the range hood control unit 11 determines the opening rate of the air supply damper 22 of each air supply device 20 based on the total opening rate and the acquired sequence information.

[0059] For example, as shown in the table at the bottom of Figure 11, the range hood control unit 11 determines the opening rate of the air intake damper 22 of the air intake device 20 for air intake inlet 1 to be 5, the opening rate of the air intake damper 22 of the air intake device 20 for air intake inlet 2 to be 5, the opening rate of the air intake damper 22 of the air intake device 20 for air intake inlet 3 to be 4, the opening rate of the air intake damper 22 of the air intake device 20 for air intake inlet 4 to be 3, and the opening rate of the air intake damper 22 of the air intake device 20 for air intake inlet 5 to be 2, by taking into consideration the air intake balance and distributing the opening rates so that the total air intake volume is 19 overall.

[0060] The air supply balance means a balance between appropriate ventilation paths and air supply volumes. For example, when allocating 19, the opening rates of the air supply ports 4 and 5 on the north side can be set to 7, the air supply ports 1 and 2 on the south side can be set to 0, and the remainder can be distributed to the air supply port 3. However, this would bias the ventilation path to the north side only, and would not maintain an appropriate ventilation path. To prevent this, the ventilation system 100 allocates air while taking into account the air supply balance. As a method of allocation, a table in which the order and the opening rate are associated in advance so that the balance is not lost may be prepared, or a flow meter may be provided in the flow path of the air supply device 20, and allocation may be performed according to the flow rate.

[0061] Moreover, during operation, the ventilation system 100 always controls the sum of the exhaust air volumes to be approximately equal to the sum of the supply air volumes. The range hood control unit 11 may control the opening ratio of the supply air dampers 22 of each air supply device 20 according to the sum of the exhaust air volumes, mainly the exhaust air volume, so that the sum of the supply air volumes is equal to the exhaust air volumes. In this way, by controlling the supply air volumes of each air supply device 20 according to the difference between the target air quality and each supply air quality so that the sum of the exhaust air volumes and the supply air volumes are equal, it is possible to approach a comfortable air environment while ensuring the necessary exhaust volume.

[0062] In addition, the range hood 10 can change the exhaust volume, for example, from strong to medium to weak, and the range hood control unit 11 controls the sum of the intake air volumes of the intake dampers 22 of the multiple air intake devices 20 so that it is equal to the changed exhaust volume. For example, as shown in the upper table of FIG. 11, at time point No. 3, the total exhaust air volume is 225 m 3 / h, the total opening ratio of the air intake device 20 is set to 19, and at point No. 4, the total exhaust air volume is 325 m 3 / h (range hood 10 exhaust air volume is 300m 3 / h corresponds to a "medium" airflow), the total opening ratio of the air intake device 20 is set to 20, and at point No. 5, the total exhaust airflow is 425 m 3 / h (range hood 10 exhaust air volume is 400m 3 / h corresponds to a "strong" airflow), and the total opening ratio of the air intake devices 20 is set to 21. In this way, by controlling the total air intake volume of the air intake devices 20 so that it is equal to the changed exhaust volume, the ventilation system 100 can always achieve an appropriate balance between intake and exhaust, while creating a comfortable air environment.

[0063] The range hood control unit 11 may mainly control the supply air volume, and may control the exhaust air volume of the exhaust fan 12 according to the sum of the supply air volumes so that the sum of the exhaust air volumes is equal to the sum of the supply air volumes. Alternatively, the range hood control unit 11 may control the sum of the exhaust air volumes so that the sum of the exhaust air volumes is equal to the sum of the supply air volumes while changing the sum of the exhaust air volumes and the sum of the supply air volumes simultaneously.

[0064] An example of the transition of the ranking of air supply devices 20 will be described with reference to Figure 12. Note that in this example, the ranking conditions are premised on the assumption that low temperature air supply, assuming summer, is advantageous, and the target temperature and humidity are constant at 28°C and 55%. At time point No. 1, the indoor temperature and humidity are 33°C and 68%, and the difference from the target temperature and humidity is +5°C and +13%, so the ranking is performed so that the opening rate of the air supply damper 22 increases in order of the largest difference between the supply temperature and humidity supplied by each air supply device 20 and the target temperature and humidity in the advantageous direction. The intake sensors 21 of each air intake device 20 detect the following: at air intake 1, 30°C·68%, a difference of +2°C; at air intake 2, 31°C·70%, a difference of +3°C; at air intake 3, 29°C·67%, a difference of +1°C; at air intake 4, 27.5°C·65%, a difference of -0.5°C; and at air intake 5, 27°C·60%, a difference of -1°C.

[0065] In this case, the ranking of the opening rate of the intake damper 22 at each intake port is such that the most advantageous intake port 5 has the largest opening rate, followed by intake port 4, intake port 3, intake port 1, and intake port 2, in that order. If the total amount of intake air for all air intake devices 20 is 19, and 19 is allocated to each air intake device 20 while taking into consideration the intake balance, the opening rate of the intake damper 22 of each air intake device 20 will be 3 at intake port 1, 2 at intake port 2, 4 at intake port 3, 5 at intake port 4, and 5 at intake port 5.

[0066] At time point No. 2, 10 minutes later, the indoor temperature and humidity are 33°C·68%, a difference of +5°C·+13% from the target temperature and humidity, so ranking is similarly performed under the ranking conditions for deviation. The air intake sensor 21 of each air intake device 20 detects the following: at air intake 1, 30°C·68%, a difference of +2°C, at air intake 2, 31°C·70%, a difference of +3°C, at air intake 3, 29°C·67%, a difference of +1°C, at air intake 4, 27°C·60%, a difference of -1°C, and at air intake 5, 27.5°C·65%, a difference of -0.5°C.

[0067] In this case, the ranking of the opening rate of the intake damper 22 at each intake port is such that the most advantageous intake port 4 has the largest opening rate, followed by intake port 5, intake port 3, intake port 1, and intake port 2, in that order. If the total amount of intake air for all air intake devices 20 is 19, and 19 is allocated to each air intake device 20 while taking into consideration the intake balance, the opening rate of the intake damper 22 of each air intake device 20 will be 3 at intake port 1, 2 at intake port 2, 4 at intake port 3, 5 at intake port 4, and 5 at intake port 5.

[0068] At point No. 3, 10 minutes later, the indoor temperature and humidity are 29.5°C·65%, a difference of +1.5°C·+10% from the target temperature and humidity, so ranking will be performed similarly under the ranking conditions for deviation, but the difference is smaller than at the previous point, indicating that the target temperature and humidity are being approached because air is being supplied preferentially from the lower temperature air intake. The air intake sensors 21 of each air intake device 20 detect the following: at air intake 1, 30°C·68%, a difference of +2°C; at air intake 2, 29.5°C·67%, a difference of +1.5°C; at air intake 3, 29°C·67%, a difference of +1°C; at air intake 4, 27.5°C·65%, a difference of -0.5°C; and at air intake 5, 27°C·60%, a difference of -1°C.

[0069] In this case, the ranking of the opening rate of the intake damper 22 at each intake port is such that the most advantageous intake port 5 has the largest opening rate, followed by intake port 4, intake port 3, intake port 2, and intake port 1 in that order. If the total amount of intake air for all air intake devices 20 is 19, and 19 is allocated to each air intake device 20 while taking into consideration the intake balance, the opening rate of the intake damper 22 of each air intake device 20 will be 2 for intake port 1, 3 for intake port 2, 4 for intake port 3, 5 for intake port 4, and 5 for intake port 5.

[0070] Further, at time point No. 4, 10 minutes later, the indoor temperature and humidity are 28°C·65%, the difference from the target temperature and humidity is ±0°C·+10%, so the ranking conditions for approximation are met, i.e., the opening rate of the intake air damper 22 is increased in the order of the difference between the intake temperature and humidity supplied by each air intake device 20 and the target temperature and humidity is smallest, and if the difference is the same, the ranking is performed in the order of the most advantageous to supply air, i.e., the order of the lowest temperature and humidity. The intake air sensor 21 of each air intake device 20 detects the following at intake port 1: 30°C·68%, a difference of +2°C, at intake port 2: 29.5°C·67%, a difference of +1.5°C, at intake port 3: 29°C·67%, a difference of +1°C, at intake port 4: 27.5°C·65%, a difference of -0.5°C, and at intake port 5: 27°C·60%, a difference of -1°C.

[0071] In this case, the ranking of the opening rate of the intake damper 22 at each intake port is the largest at intake port 4, which has the smallest difference, followed by decreasing opening rates at intake port 5, intake port 3, intake port 2, and intake port 1. If the total amount of intake air for all of the air intake devices 20 is 18, and 18 is allocated to each air intake device 20 while taking into consideration the air intake balance, the opening rate of the intake damper 22 of each air intake device 20 will be 2 at intake port 1, 2 at intake port 2, 4 at intake port 3, 5 at intake port 4, and 5 at intake port 5. Note that while the total amount of intake air is set to 18 here, a case in which the ventilation air volume changes (for example, the room ventilation fan VF reduces its air volume) is assumed.

[0072] At time point No. 5, 10 minutes later, the indoor temperature and humidity are 28.5°C·65%, a difference of +0.5°C·+10% from the target temperature and humidity, so ranking is similarly performed under the ranking conditions for approximation. Note that pressure sensor 40 had previously detected a negative pressure of 5 Pa, but at this point it detects 10 Pa. The air intake sensors 21 of each air intake device 20 detect the following: at air intake 1, 30°C·68%, a difference of +2°C; at air intake 2, 29.5°C·67%, a difference of +1.5°C; at air intake 3, 29°C·67%, a difference of +1°C; at air intake 4, 26.5°C·65%, a difference of -1.5°C; and at air intake 5, 26°C·60%, a difference of -2°C.

[0073] If this is done, the ranking of the opening rate of the intake damper 22 at each air intake port will be the largest at air intake port 3, which has the smallest difference, followed by decreasing opening rates at air intake port 4, air intake port 2, air intake port 5, and air intake port 1. At this point, the negative pressure is greater than before, so the sum of the entire intake air volume of the air intake device 20 is increased to make the opening rate 20, and the increase is assigned to air intake port 3, which has the smallest difference, and 20 is distributed to each air intake device 20 while taking into consideration the air intake balance, so the opening rate of the intake damper 22 of each air intake device 20 will be 2 at air intake port 1, 4 at air intake port 2, 6 at air intake port 3, 5 at air intake port 4, and 5 at air intake port 5.

[0074] In this way, when the pressure sensor 40 detects a predetermined negative pressure state, the range hood control unit 11 preferably controls each air supply damper 22 to increase the air supply volume in the air supply devices 20 that have room to increase the air supply volume. According to this, in the case of a predetermined negative pressure state, by controlling the air supply devices 20 that have room to increase the air supply volume to increase the air supply volume, it is possible to increase the air supply volume from the air supply devices 20 that are advantageous for achieving the target air quality while also eliminating the negative pressure. Also, among the air supply devices 20 that have room to increase the air supply volume, it is preferable to increase the air supply volume from the air supply device 20 that is most advantageous for supplying air at that time. This reduces energy loss in the building and allows the building to quickly approach a comfortable air environment.

[0075] The predetermined negative pressure state is set appropriately according to the actual environment. For example, since constant ventilation is normally performed in recent homes, a negative pressure state of about 5 Pa is considered to be the norm, but when a range hood 10 with a larger static pressure is operated from that state, the negative pressure increases, so when a negative pressure of about 10 Pa is detected, each air intake damper 22 is controlled to increase the amount of air intake in the air intake device 20 that has room to increase the amount of air intake. In homes where constant ventilation is not performed, similar control may be performed when a negative pressure of about 5 Pa is detected.

[0076] What has been described above in this embodiment is also a ventilation method for controlling at least one exhaust device that exhausts air from the internal space IS of the building HS to the external space OS, and one or both of a plurality of air supply devices that supply air from the external space OS of the building HS to the internal space IS. This ventilation method acquires the supply air quality detected by each of the supply air sensors that detect the supply air quality of the air supplied through the air supply device, and controls the amount of air supplied through each air supply device according to the difference between each of the acquired supply air quality and a predetermined target air quality. According to this, by controlling the amount of air supplied through each air supply device according to the difference between the supply air quality of the air supplied through the air supply device and the predetermined target air quality, it is possible to provide a ventilation method that comprehensively considers the supply and exhaust environment of the building and can approach a more comfortable air environment with less energy loss in the building.

[0077] The present invention is not limited to the illustrated examples, and may be implemented in any configuration that does not deviate from the scope of the claims. That is, the present invention has been particularly illustrated and described mainly with respect to specific embodiments, but those skilled in the art may make various modifications to the above-described embodiments in terms of the number and other details of the configuration without departing from the scope of the technical idea and purpose of the present invention. [Explanation of symbols]

[0078] 100 Ventilation System 10 Range hood (exhaust system) 11 Range hood control unit 111 Exhaust air volume control unit 112 Air supply control unit 113 Target air quality acquisition section 114 Judgment processing unit 115 Input section 116 RH Communications Department 12 Exhaust fan 20 Air supply system 21 Air supply sensor 22 Air supply damper (air supply volume adjustment section) 23 AS Communications Department 30 Temperature and humidity sensor (internal space air quality sensor) 40 Pressure sensor (pressure difference detection part) 50 Home controller control section 51 Equipment control section 52 Target air quality setting unit 53 Display section 54 HC Communication Department HS building IS interior space OS external space AC air conditioner VF Room ventilation fan AP Air Purifier

Claims

1. at least one exhaust device for exhausting air from an interior space of the building to an exterior space; A plurality of air supply devices that supply air from an exterior space of the building to an interior space; A control unit that controls one or both of the exhaust device and the air supply device; a target air quality acquisition unit for acquiring a predetermined target air quality; A ventilation system comprising: Each of the air supply devices is an intake air sensor for detecting an intake air quality of the air supplied through the intake device; an air supply amount adjusting unit that adjusts the amount of air supplied through the air supply device; Equipped with The control unit is Obtaining the intake air quality detected by each of the intake air sensors; controlling each of the supply air amount adjustment units according to the magnitude of a difference between each of the acquired supply air qualities and the target air quality acquired by the target air quality acquisition unit; Ventilation system.

2. The ventilation system described in claim 1, characterized in that the control unit controls each of the supply air volume adjustment units in accordance with conditions regarding increasing or decreasing the supply air volume in the supply air device that are set based on a predetermined value calculated from the supply air quality detected by all or some of the supply air sensors.

3. An interior space air quality sensor for detecting air quality in an interior space of the building, The control unit is Obtaining the air quality of the interior space detected by the air quality sensor of the interior space; controlling each of the supply air amount adjustment units based on the acquired internal space air quality, the target air quality, and each supply air quality; 3. The ventilation system according to claim 2.

4. The ventilation system described in claim 3, characterized in that the control unit controls each of the air supply volume adjustment units in accordance with an approximate deviation judgment between the target air quality and the internal space air quality based on the magnitude of the difference between the target air quality and the internal space air quality.

5. The control unit is when it is determined in the approximate deviation determination that the difference between the target air quality and the internal space air quality is less than a predetermined difference, the air supply amount adjustment unit is controlled so that the amount of air supplied from the air supply device having the smaller difference between the target air quality and the supply air quality is increased; When it is determined in the approximate deviation determination that the difference between the target air quality and the air quality of the internal space is equal to or greater than a predetermined difference, the air supply amount adjustment unit is controlled so that the amount of air supplied from the air supply device having a larger difference between the target air quality and the supply air quality is increased.

5. A ventilation system according to claim 4.

6. A pressure difference detection unit is further provided for detecting a pressure difference between an internal space of the building and an external space of the building, When the pressure difference detection unit detects a predetermined negative pressure state, the control unit controls each of the air supply amount adjustment units so as to increase the air supply amount in the air supply device in which there is room for increasing the air supply amount.

6. A ventilation system according to claim 5.

7. A ventilation system as described in any one of claims 1 to 6, characterized in that the control unit controls each of the air supply volume adjustment units so that the sum of the exhaust volumes of the exhaust devices is equal to the sum of the air supply volumes of the multiple air supply devices.

8. The exhaust device is capable of changing an exhaust amount, The ventilation system according to claim 7 , wherein the control unit controls a sum of the air supply amounts of the plurality of air supply devices so as to be equal to the changed exhaust amount.

9. A ventilation method for controlling at least one exhaust device that exhausts air from an internal space of a building to an external space, and / or a plurality of air supply devices that supply air from an external space of the building to the internal space, the method comprising the steps of: acquiring the intake air quality detected by each of the intake air sensors that detects the intake air quality of the air supplied through the intake device; controlling the amount of air supplied through each of the air supply devices according to the magnitude of difference between each of the obtained supply air qualities and a predetermined target air quality; Ventilation methods.

Images