Ventilation equipment and systems

Abstract

Provided is a ventilation device that is capable of efficiently suppressing pollution outside a room flowing into the room, according to the degree of pollution outside the room, and is capable of ensuring comfort for people in the room. For this purpose, the ventilation device comprises: an air supply unit and an exhaust unit; an air supply rate changing unit for changing an air supply rate; an exhaust rate changing unit for changing an exhaust rate; an air purification unit for purifying air to be supplied to the room; a data acquisition unit for acquiring, from an external data source, outside air environmental data including information relating to a degree of pollution of the outside air; and a control unit for controlling the air supply rate changing unit and the exhaust rate changing unit. When the degree of pollution of the outside air exceeds a preset standard on the basis of the outside air environmental data, the control unit switches from a first control to a second control. In the first control, the control unit sets the air supply rate to a first air supply rate and the exhaust rate to a first exhaust rate. In the second control, the control unit sets the air supply rate to a second air supply rate and the exhaust rate to a second exhaust rate. The amount of increase of the second air supply rate relative to the first air supply rate is greater than the amount of increase of the second exhaust rate relative to the first exhaust rate.

Description

[Technical field]

[0001] The present disclosure relates to ventilation devices and systems. [Background technology]

[0002] A known ventilation system is a system that includes an air quality conversion means that can convert the quality of outside air into environmentally friendly air, a blowing means, and a duct means that sends the environmentally friendly air converted by the air quality conversion means into the interior of a building via the blowing means, and that is provided with an exhaust unit that exhausts air from inside the building to the outside, and that makes the exhaust air volume of the exhaust unit variable to adjust the pressure difference between inside and outside the building (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2002-195623 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with the technology disclosed in Patent Document 1, it is difficult to grasp the level of pollution of the air outside the building, and it is difficult to adjust the amount of air supply and exhaust in accordance with the level of pollution of the outdoor air and to efficiently prevent outdoor pollution from flowing into the room.

[0005] The present disclosure has been made to solve such problems, and has an objective to provide a ventilation device and a ventilation system that can adjust the amount of intake air and the amount of exhaust air according to the degree of pollution of the outdoor air, and efficiently prevent outdoor pollution from entering the room. [Means for solving the problem]

[0006] a control unit that controls the supply air volume change unit and the exhaust volume change unit; a heat exchange element that performs heat exchange between air passing through the supply air unit and air passing through the exhaust unit; a bypass ventilation unit that can supply air by the supply air unit and exhaust air by the exhaust unit without passing through the heat exchange element; and an outdoor air temperature sensor that detects the outdoor air temperature, and the control unit switches from a first control to a second control when the outdoor air pollution level increases above a preset standard based on the outdoor air environment data, and is equal to or greater than the upper limit of a preset reference range, or the detection result of the outdoor air temperature sensor is equal to or less than the lower limit of the reference range, the heat exchange element is caused to perform heat exchange. A bypass ventilation section is controlled, and in the first control, the supply air volume is set to a first supply air volume and the exhaust volume is set to a first exhaust volume, and in the second control, the supply air volume is set to a second supply air volume and the exhaust volume is set to a second exhaust volume, and an increase in the second supply air volume relative to the first supply air volume is greater than an increase in the second exhaust volume relative to the first exhaust volume.

[0007] a control unit that controls the supply air volume change unit and the exhaust volume change unit, a heat exchange element that performs heat exchange between air passing through the supply air unit and air passing through the exhaust unit, a bypass ventilation unit that can supply air by the supply air unit and exhaust air by the exhaust unit without passing through the heat exchange element, and an outdoor air temperature sensor that detects the outdoor air temperature, and the control unit switches from a first control to a second control when the outdoor air pollution level increases above a preset standard based on the outdoor air environment data, and is equal to or greater than the upper limit of a preset reference range, or the detection result of the outdoor air temperature sensor is equal to or less than the lower limit of the reference range, the heat exchange element is caused to perform heat exchange. The bypass ventilation section is controlled, and in the first control, the supply air volume is set to a first supply air volume and the exhaust volume is set to a first exhaust volume, and in the second control, the supply air volume is set to a second supply air volume and the exhaust volume is set to a second exhaust volume, and a reduction in the second supply air volume relative to the first supply air volume is smaller than a reduction in the second exhaust volume relative to the first exhaust volume.

[0008] In addition, the ventilation system according to the present disclosure includes a ventilation device configured as described above and an air conditioner capable of performing air conditioning in the room, and the air conditioner performs linked air conditioning operation when the ventilation device performs the second control. Effect of the Invention

[0009] The ventilation device and ventilation system according to the present disclosure have the advantage of being able to adjust the amount of air supply and exhaust depending on the level of pollution of the outdoor air, thereby efficiently preventing outdoor pollution from entering the room. [Brief description of the drawings]

[0010] [Figure 1] 1 is a cross-sectional view showing a schematic configuration of a building in which a ventilation device according to a first embodiment is installed. [Diagram 2] 2 is a block diagram showing the configuration of a control system of the ventilation device according to the first embodiment. FIG. [Diagram 3] 4 is a flow chart showing an example of the operation of the ventilation device according to the first embodiment. FIG. [Figure 4] 6 is a flow chart showing another example of the operation of the ventilation device according to the first embodiment. FIG. [Diagram 5] FIG. 11 is a cross-sectional view showing a schematic configuration of a building in which a ventilation device and a ventilation system according to a second embodiment are installed. [Figure 6] FIG. 11 is a perspective view of a heat exchange element included in the ventilation device according to the second embodiment. [Figure 7] FIG. 11 is a block diagram showing the configuration of a control system of a ventilation device and a ventilation system according to a second embodiment. [Figure 8] FIG. 11 is a flow chart showing an example of the operation of the ventilation system according to the second embodiment. [Figure 9] 10 is a flow diagram showing an example of the operation of an air conditioner according to the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] The embodiment for carrying out the ventilation device and ventilation system according to the present disclosure will be described with reference to the attached drawings. In each drawing, the same or corresponding parts are given the same reference numerals, and the overlapping description will be appropriately simplified or omitted. In the following description, for convenience, the positional relationship of each structure may be expressed based on the illustrated state. Note that the present disclosure is not limited to the following embodiments, and it is possible to freely combine each embodiment, modify any component of each embodiment, or omit any component of each embodiment within the scope of the present disclosure.

[0012] Embodiment 1 A first embodiment of the present disclosure will be described with reference to Fig. 1 to Fig. 4. Fig. 1 is a cross-sectional view showing a schematic configuration of a building in which a ventilation device is installed. Fig. 2 is a block diagram showing a configuration of a control system of the ventilation device. Fig. 3 is a flow diagram showing an example of the operation of the ventilation device. Fig. 4 is a flow diagram showing another example of the operation of the ventilation device.

[0013] Fig. 1 is a schematic diagram showing an example of a building 1 in which a ventilation device according to this embodiment is installed. As shown in the figure, the building 1 is provided with one or more rooms to be ventilated. In the example shown in the figure, the building 1 is provided with three rooms: a first room 1a, a second room 1b, and a third room 1c.

[0014] A ventilation device main body 10 is installed in a building 1. In the illustrated configuration example, the ventilation device main body 10 is installed in the ceiling of the building. The ventilation device main body 10 ventilates each room in the building 1, that is, it introduces outside air into each room of the building 1 and exhausts the air in each room to the outside. The ventilation device main body 10 has a housing. An intake air duct 10a and an exhaust air duct 10b are formed in the housing of the ventilation device main body 10.

[0015] The building 1 is provided with an indoor supply air duct 20 and an indoor exhaust duct 21. In the illustrated configuration example, the indoor supply air duct 20 and the indoor exhaust duct 21 are installed in the ceiling of the building 1. An indoor supply air port 22 is provided in the ceiling of each room of the building 1. FIG. 1 illustrates the indoor supply air ports 22 provided in each of the second room 1b and the third room 1c. One end of the indoor supply air duct 20 is connected to the supply air duct 10a of the ventilator main body 10. The other end of the indoor supply air duct 20 is connected to each indoor supply air port 22.

[0016] An indoor exhaust port 23 is provided in the ceiling of each room of the building 1. In Fig. 1, the indoor exhaust port 23 provided in the first room 1a is shown. One end of the indoor exhaust duct 21 is connected to the exhaust air passage 10b of the ventilator main body 10. The other end of the indoor exhaust duct 21 is connected to each indoor exhaust port 23.

[0017] It is not necessary to provide both the indoor air supply vent 22 and the indoor exhaust vent 23 in each of all rooms in the building 1. The rooms in the building 1 are connected to each other, for example, via undercuts in the doors of the rooms, louvers provided in the doors, or corridors. Therefore, it is sufficient that at least any one of the rooms is provided with the indoor air supply vent 22. Similarly, it is sufficient that at least any one of the rooms is provided with the indoor exhaust vent 23.

[0018] The building 1 is provided with an outdoor air supply duct 24 and an outdoor air exhaust duct 25. In the illustrated configuration example, the outdoor air supply duct 24 and the outdoor air exhaust duct 25 are installed in the ceiling of the building 1. One end of the outdoor air supply duct 24 is connected to the supply air duct 10a of the ventilation device main body 10. The other end of the outdoor air supply duct 24 is connected to the outside air. In addition, one end of the outdoor air exhaust duct 25 is connected to the exhaust air duct 10b of the ventilation device main body 10. The other end of the outdoor air exhaust duct 25 is connected to the outside air.

[0019] The ventilation device main body 10 is equipped with an intake fan 11 and an exhaust fan 12. The intake fan 11 is disposed in an intake air duct 10a of the housing of the ventilation device main body 10. The exhaust fan 12 is disposed in an exhaust air duct 10b of the housing of the ventilation device main body 10.

[0020] When the intake fan 11 operates, outside air from outside the building 1 is taken into the intake air duct 10a of the ventilator main body 10 via the outdoor air intake duct 24. The outdoor air taken into the intake air duct 10a is then sent out to the indoor air intake duct 20 by the intake fan 11. The air sent out to the indoor air intake duct 20 is supplied to the interior of each room from the indoor air intake port 22. The outdoor air intake duct 24, intake air duct 10a, indoor air intake duct 20, and indoor air intake port 22 configured as described above are an example of an air intake section that introduces outdoor air from outside and supplies it to the room.

[0021] When the exhaust fan 12 operates, indoor air from each room is drawn into the exhaust air duct 10b of the ventilator main body 10 from the indoor exhaust port 23 via the indoor exhaust duct 21. The outdoor air drawn into the exhaust air duct 10b is sent to the outdoor air exhaust duct 25 by the exhaust fan 12. The air sent to the outdoor air exhaust duct 25 is then exhausted to the outside of the building 1 from the outdoor air exhaust duct 25. The indoor exhaust port 23, the indoor exhaust duct 21, the exhaust air duct 10b, and the outdoor air exhaust duct 25 configured as described above are an example of an exhaust section that exhausts indoor air to the outside.

[0022] The ventilation device configured as described above performs the first type ventilation in which both the intake and exhaust are performed mechanically. In the ventilation device according to this embodiment, the rotation speeds of the intake fan 11 and the exhaust fan 12 are variable. By changing the rotation speed of the intake fan 11, the intake air volume of the intake section described above can be changed. The intake fan 11 is an example of an intake air volume change unit that changes the intake air volume of the intake section described above. Similarly, by changing the rotation speed of the exhaust fan 12, the exhaust air volume of the exhaust section described above can be changed. The exhaust fan 12 is an example of an exhaust air volume change unit that changes the exhaust air volume of the exhaust section described above.

[0023] It is desirable that the intake fan 11 and the exhaust fan 12 are provided with a DC (Direct-Current) motor as a motor for rotating the fan. Compared to an AC (Alternating Current) motor, a DC motor has the characteristic of being able to adjust the rotation speed more accurately, and the use of a DC motor allows for stable variable control of the air volume.

[0024] The rotation speeds of the supply air fan 11 and the exhaust air fan 12 do not have to be variable. In this case, the supply air amount change unit may be configured to change the supply air amount of the supply air section by, for example, a damper provided in any one of the supply air duct 10a, the indoor supply air duct 20, and the outdoor air supply air duct 24. Similarly, the exhaust air amount change unit may be configured to change the exhaust air amount of the exhaust section by, for example, a damper provided in any one of the exhaust air duct 10b, the indoor exhaust duct 21, and the outdoor air exhaust duct 25.

[0025] The ventilation device main body 10 is provided with an air purifier 18. The air purifier 18 is arranged, for example, in the air supply duct 10a of the housing of the ventilation device main body 10. The air purifier 18 is provided with one or more of a dust filter, an electric dust collector, a gas removal filter, a discharge device for inactivating microorganisms and viruses, an ultraviolet ray irradiator, an ion generator, and an ozone generator, and purifies the air passing through the air purifier 18 by these means. The air passing through the air supply duct 10a in which the air purifier 18 is provided is the air supplied into the room by the above-mentioned air supply unit. That is, the air purifier 18 is an example of an air purifier that purifies the air supplied into the room by the above-mentioned air supply unit. Therefore, purified air is supplied from the indoor air supply port 22 into each room of the building 1.

[0026] In the configuration example shown in Fig. 1, a ventilation opening 40 is formed in a wall of a building 1. In the illustrated example, a first room 1a and a third room 1c are each provided with a ventilation opening 40. The interior and exterior of the rooms of the building 1 are connected via the ventilation opening 40. The ventilation opening 40 is an example of an opening that connects the interior and exterior of the rooms of the building 1. Other examples of openings that connect the interior and exterior include gaps formed in the wall of the building 1 and open windows.

[0027] Next, the configuration of the control system of the ventilation device according to this embodiment will be described with reference to Fig. 2. As shown in the figure, the ventilation device main body 10 includes a ventilation device communication unit 13, a ventilation device information acquisition unit 14, a ventilation device input unit 15, a ventilation device control unit 16, and a ventilation device output unit 17.

[0028] The ventilation device input unit 15 is provided, for example, as an operation panel of the ventilation device main body 10. The ventilation device input unit 15 is operated by a user to input parameters and the like related to the operation of the ventilation device. The operation panel may be provided with a display unit for displaying various information related to the ventilation device. The display unit of the operation panel is, for example, a liquid crystal display. Note that a touch panel serving both as the ventilation device input unit 15 and the display unit may be provided. The ventilation device input unit 15 may also be provided as a remote controller in each room.

[0029] The ventilator main body 10 includes, as hardware, a computer equipped with a processor and a memory. The processor is also called a CPU (Central Processing Unit), central processing unit, processing unit, arithmetic unit, microprocessor, microcomputer, or DSP. The memory includes, for example, non-volatile or volatile semiconductor memory such as RAM, ROM, flash memory, EPROM, and EEPROM, or a magnetic disk, flexible disk, optical disk, compact disk, mini disk, and DVD.

[0030] A program as software is stored in the memory of the ventilation device main body 10. The ventilation device main body 10 performs preset processing by having a processor execute the program stored in the memory, and as a result of the hardware and software working together, realizes the functions of each of the following units: a ventilation device communication unit 13, a ventilation device information acquisition unit 14, a ventilation device control unit 16, and a ventilation device output unit 17.

[0031] The circuit of the ventilator main body 10 may be formed as dedicated hardware, for example. A part of the circuit of the ventilator main body 10 may be formed as dedicated hardware, and the circuit may be provided with a processor and a memory. A circuit partly formed as dedicated hardware may be, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination of these.

[0032] The ventilation device communication unit 13 transmits and receives various information via a communication network, etc. The ventilation device main body 10 can transmit and receive various information to and from the outside of the ventilation device main body 10 via the ventilation device communication unit 13. The communication at this time may be performed either wired or wirelessly, and any communication protocol may be used as long as mutual communication can be performed.

[0033] In the illustrated configuration example, the ventilation device communication unit 13 is provided so as to be able to communicate with a cloud server 104 via a network router 100. The cloud server 104 is a virtual server consisting of one or more physical servers. The cloud server 104 aggregates information from a weather information server 101, a device operation application 102, an environmental sensor 103, etc., and provides a service of transmitting the aggregated information.

[0034] The weather information server 101 transmits weather forecast information for the area in which the building 1 is located. The weather forecast information transmitted from the weather information server 101 includes forecast values ​​related to the degree of pollution of the outside air, such as PM2.5, pollen, and photochemical smog. The device operation application 102 is an application executed on, for example, a smartphone, a tablet terminal, a PC, or the like. The device operation application 102 provides a function equivalent to the operation panel of the ventilator input unit 15 described above. When the device operation application 102 is operated, an operation signal is transmitted from the device operation application 102.

[0035] The environmental sensor 103 detects physical quantities related to the outdoor environment of the building 1 and transmits the detection results. The data transmitted from the environmental sensor 103 includes actual values ​​related to the degree of pollution of the outdoor air, such as PM2.5, pollen, and photochemical smog.

[0036] As described above, the forecast values ​​related to the pollution level of the outside air transmitted from the weather information server 101 and the actual values ​​related to the pollution level of the outside air transmitted from the environmental sensor 103 are aggregated in the cloud server 104. The ventilation device communication unit 13 receives these data aggregated in the cloud server 104, i.e., the forecast values ​​and actual values ​​related to the pollution level of the outside air, via the network router 100. The ventilation device communication unit 13 also receives an operation signal transmitted from the device operation application 102 via the cloud server 104 and the network router 100.

[0037] The ventilation device information acquisition unit 14 acquires necessary information from the information source. The ventilation device information acquisition unit 14 acquires data received by the ventilation device communication unit 13, i.e., data of forecast values ​​and actual values ​​related to the pollution level of the outside air, as external environment data. Therefore, the external environment data acquired by the ventilation device communication unit 13 includes at least information related to the pollution level of the outside air. Note that the external environment data only needs to include at least one of the forecast values ​​and actual values ​​related to the pollution level of the outside air. Therefore, the cloud server 104 only needs to aggregate data of at least one of the weather information server 101 and the environmental sensor 103. In addition, the ventilation device information acquisition unit 14 also acquires information input to the ventilation device input unit 15 and an operation signal received by the ventilation device communication unit 13.

[0038] The ventilation device control unit 16 determines the operation control content of the ventilation device main body 10 based on the information acquired by the ventilation device information acquisition unit 14. Specifically, the ventilation device control unit 16 determines the rotation speeds of the intake air fan 11 and the exhaust air fan 12, etc. The ventilation device output unit 17 generates a control signal of the control content determined by the ventilation device control unit 16 and outputs it to the intake air fan 11 and the exhaust air fan 12. The intake air fan 11 and the exhaust air fan 12 then operate according to the control signal output from the ventilation device output unit 17. In this way, the ventilation device control unit 16 controls the intake air fan 11, which is the above-mentioned intake air amount change unit, and the exhaust air fan 12, which is the above-mentioned exhaust air amount change unit.

[0039] In the ventilation device according to this embodiment, the ventilation device control unit 16 can execute a first control and a second control. The first control is normal ventilation control. The second control is outdoor air pollution suppression control. In the first control, the ventilation device control unit 16 controls the intake fan 11, which is an intake amount changing unit, so that the intake amount by the intake unit described above becomes the first intake amount. Also, in the first control, the ventilation device control unit 16 controls the exhaust fan 12, which is an exhaust amount changing unit, so that the exhaust amount by the exhaust unit described above becomes the first exhaust amount. In the second control, the ventilation device control unit 16 controls the intake fan 11, which is an intake amount changing unit, so that the intake amount by the intake unit described above becomes the second intake amount. Also, in the second control, the ventilation device control unit 16 controls the exhaust fan 12, which is an exhaust amount changing unit, so that the exhaust amount by the exhaust unit described above becomes the second exhaust amount.

[0040] The ventilation device control unit 16 switches between the first control and the second control based on the outdoor air environment data acquired by the ventilation device information acquisition unit 14. The ventilation device control unit 16 judges whether the outdoor air pollution level increases above a preset standard based on the outdoor air environment data. In the present disclosure, an increase in the outdoor air pollution level includes both an increase in the predicted value of the outdoor air pollution level and an increase in the actual value of the outdoor air pollution level. That is, the ventilation device control unit 16 judges that the outdoor air pollution level increases above the standard when at least one of the predicted value and the actual value of the outdoor air pollution level increases above the standard. Then, the ventilation device control unit 16 judges that the outdoor air pollution level does not increase above the standard when neither the predicted value nor the actual value of the outdoor air pollution level increases above the standard.

[0041] When the pollution level of the outside air does not increase above the standard, i.e., in the normal case, the ventilation device control unit 16 executes the first control, i.e., normal ventilation control. When the pollution level of the outside air increases above the standard, the ventilation device control unit 16 executes the second control, i.e., outdoor air pollution suppression control. In other words, when the pollution level of the outside air increases above a preset standard based on the outdoor air environment data, the ventilation device control unit 16 switches from the first control to the second control.

[0042] The first supply air amount and the first exhaust air amount in the first control, and the second supply air amount and the second exhaust air amount in the second control are determined so as to satisfy the following relationship (A) or (B). (A) The increase in the second air supply amount relative to the first air supply amount is greater than the increase in the second exhaust amount relative to the first exhaust amount. (B) The amount of reduction of the second air supply amount relative to the first air supply amount is smaller than the amount of reduction of the second exhaust amount relative to the first exhaust amount.

[0043] The above cases (A) and (B) may also include a case where only one of the intake air volume and the exhaust air volume increases or decreases, while the other does not change. The increase and decrease amounts referred to here may be made to take both positive and negative values. In this case, the above cases (A) and (B) also include a case where the second intake air volume increases relative to the first intake air volume, and the second exhaust air volume decreases relative to the first exhaust air volume. Therefore, when the increase and decrease amounts are made to take both positive and negative values, the above cases (A) and (B) are essentially the same.

[0044] Next, an example of the operation of the ventilation device according to this embodiment will be described with reference to the flow charts of Fig. 3 and Fig. 4. Fig. 3 shows an example of the operation of the ventilation device according to this embodiment. In this example, first, in step S101, the ventilation device information acquisition unit 14 acquires the device status. The device status here includes the operation parameters of the ventilation device input to the ventilation device input unit 15, the operation signal transmitted from the device operation application 102, etc.

[0045] In the following step S102, the ventilation device control unit 16 determines whether or not to perform automatic operation control based on the device state acquired in step S101. That is, if the operation parameters and operation signals indicate that automatic operation is set, the ventilation device control unit 16 decides to perform automatic operation control. On the other hand, if automatic operation is not set, the ventilation device control unit 16 decides not to perform automatic operation control. If automatic operation control is not to be performed, the ventilation device control unit 16 next performs the process of step S103.

[0046] In step S103, the ventilation device control unit 16 performs manual operation control of the ventilation device. That is, the ventilation device control unit 16 controls the intake fan 11 and the exhaust fan 12 based on the set value of the ventilation amount input to the ventilation device input unit 15 or the device operation application 102.

[0047] On the other hand, in step S102, when automatic operation control is performed, the ventilation device control unit 16 next performs the process of step S104. In step S104, the ventilation device control unit 16 starts the automatic operation control. At the start of the automatic operation control, the ventilation device control unit 16 performs, for example, the above-mentioned first control, i.e., normal ventilation control. In this case, the ventilation device control unit 16 controls the supply air fan 11 so that the supply air volume becomes the first supply air volume, and controls the exhaust air fan 12 so that the exhaust air volume becomes the first exhaust air volume.

[0048] In the next step S105, the ventilation device information acquisition unit 14 acquires external information. The external information here is the external environment data described above. The external environment data includes information on the degree of pollution of the outside air (at least one of a forecast value and a real value). After step S105, the ventilation device control unit 16 then performs the process of step S106.

[0049] In step S106, the ventilation device control unit 16 determines whether the pollution level of the outside air is equal to or higher than the standard based on the external information, i.e., the external environment data, acquired in step S105. If the pollution level of the outside air is not equal to or higher than the standard, the ventilation device control unit 16 then performs the process of step S107. In step S107, the ventilation device control unit 16 performs normal ventilation control, i.e., the first control described above.

[0050] On the other hand, in step S106, if the pollution level of the outside air is equal to or higher than the standard, the ventilation device control unit 16 next performs the process of step S108. In step S108, the ventilation device control unit 16 performs the outside air pollution suppression control, that is, the above-mentioned second control. Therefore, in the following step S109, the ventilation device control unit 16 increases the operation amount of the supply air fan 11 by a certain amount from the initial state. The initial state here is the state in which the automatic operation control is started in step S104. As described above, when the first control is performed at the start of the automatic operation control, the supply air amount in the initial state is the first supply air amount. That is, in step S109, the ventilation device control unit 16 increases the operation amount of the supply air fan 11 so that the supply air amount increases from the first supply air amount to the second supply air amount. Note that in this example, the operation amount of the exhaust fan 12 is not changed. After step S109, the ventilation device control unit 16 next performs the process of step S110.

[0051] In step S110, the ventilation device control section 16 maintains the operating state of step S109 for a preset fixed time period. Then, when the fixed time period has elapsed, the ventilation device returns to step S105 and continues operating.

[0052] Next, Fig. 4 shows another example of the operation of the ventilation device according to this embodiment. Steps S201 to S208 and S210 in Fig. 4 are the same as steps S101 to S108 and S110 in Fig. 3. Therefore, the explanation of steps S201 to S208 and S210 in Fig. 4 will be omitted here to avoid duplication.

[0053] After step S208 in FIG. 4, the ventilation device control unit 16 performs the process of step S209. In step S209, the ventilation device control unit 16 reduces the operation amount of the exhaust fan 12 by a certain amount from the initial state. The initial state here is the state in which the automatic operation control is started in step S204. When the first control is performed at the start of the automatic operation control, the exhaust amount in the initial state is the first exhaust amount. That is, in step S209, the ventilation device control unit 16 reduces the operation amount of the exhaust fan 12 so that the exhaust amount decreases from the first exhaust amount to the second exhaust amount. Note that, in this example, the operation amount of the supply air fan 11 is not changed. Then, after step S209, the ventilation device control unit 16 next performs the process of step S210.

[0054] In the ventilation device configured as described above, the ventilation device control unit 16 switches from the first control, which is normal ventilation control, to the second control, which is outdoor air pollution suppression control, when the outdoor air pollution level increases above a preset standard based on the outdoor air environment data. In outdoor air pollution suppression control, the amount of air supply relative to the amount of air exhaust is increased compared to normal ventilation control. Therefore, the pressure inside the room increases relative to the pressure outside the room. Therefore, compared to normal ventilation control, outdoor air pollution can be made less likely to flow into the room through gaps such as the ventilation opening 40 of the building 1 during outdoor air pollution suppression control. That is, the amount of air supply and the amount of air exhaust are adjusted according to the outdoor air pollution level, and outdoor pollution can be efficiently suppressed from flowing into the room. This also makes it possible to ensure the comfort of people inside the room.

[0055] The environmental sensor 103 may further include an outdoor air quality sensor that detects the outdoor air quality. The outdoor air quality sensor detects one or more of the following as the outdoor air quality: gas concentration of VOCs, odorous gases, carbon dioxide, etc. in the outdoor air; dust concentration of dust, etc.; and amount of microorganisms such as viruses, mold, and bacteria. In this case, the external environment data acquired by the ventilation device information acquisition unit 14 also includes detection data of the outdoor air quality sensor of the environmental sensor 103. Then, the ventilation device control unit 16 determines whether the pollution level of the outdoor air increases above a preset standard based on the external environment data including the detection data of the outdoor air quality sensor. Therefore, in this case, the ventilation device control unit 16 controls the intake fan 11 and the exhaust fan 12 according to the detection result of the outdoor air quality sensor as well.

[0056] The environmental sensor 103 may further include an indoor air quality sensor that detects indoor air quality. The indoor air quality sensor detects one or more of the following as the air quality: gas concentration of VOC, odorous gas, carbon dioxide, etc., dust concentration of dust, etc., and amount of microorganisms such as viruses, mold, and bacteria in the indoor air in each room of the building 1. In this case, the ventilation device information acquisition unit 14 also acquires detection data of the indoor air quality sensor of the environmental sensor 103 via the ventilation device communication unit 13, the network router 100, and the cloud server 104. Then, the ventilation device control unit 16 controls the intake fan 11 and the exhaust fan 12 according to the detection result of the indoor air quality sensor. For example, the ventilation device control unit 16 determines whether or not the pollution level of the indoor air is equal to or higher than a preset standard based on the detection result of the indoor air quality sensor. Then, if the pollution level of the indoor air is equal to or higher than the standard, the ventilation device control unit 16 performs a third control. The third control is an indoor pollution discharge control. In the third control which is indoor pollution discharge control, the ventilation device control unit 16 controls the intake fan 11 which is the intake air volume change unit and the exhaust fan 12 which is the exhaust air volume change unit so that the exhaust air volume of the exhaust unit is greater than the intake air volume of the intake unit. In this way, indoor pollution can be quickly discharged to the outside. Alternatively, the ventilation device control unit 16 may perform the third control which is indoor pollution discharge control when the pollution level of the indoor air is equal to or higher than the pollution level of the outside air based on the external environment data and the detection result of the indoor air quality sensor.

[0057] In the configuration example described above, the ventilation device control unit 16 of the ventilation device main body 10 determines whether the ventilation device performs the first control or the second control. However, the determination of whether the ventilation device performs the first control or the second control does not have to be performed by the ventilation device main body 10. For example, the cloud server 104 may have a determination unit that determines whether the ventilation device performs the first control or the second control. In this case, the ventilation device control unit 16 controls the supply air fan 11 and the exhaust air fan 12 according to the control content determined by the determination unit of the cloud server 104. Therefore, in this case, it can be said that the ventilation device control unit 16 and the determination unit of the determination unit of the cloud server 104 constitute a control unit that controls the supply air fan 11 and the exhaust air fan 12.

[0058] Embodiment 2 A second embodiment of the present disclosure will be described with reference to Figs. 5 to 9. Fig. 5 is a cross-sectional view showing a schematic configuration of a building in which a ventilation device and a ventilation system are installed. Fig. 6 is a perspective view of a heat exchange element provided in the ventilation device. Fig. 7 is a block diagram showing a configuration of a control system of the ventilation device and the ventilation system. Fig. 8 is a flow diagram showing an example of the operation of the ventilation system. Fig. 9 is a flow diagram showing an example of the operation of an air conditioner.

[0059] In the second embodiment described here, in the configuration of the first embodiment described above, the ventilation device is equipped with a heat exchange element. The ventilation system is made up of an air conditioner and a ventilation device equipped with the heat exchange element. The ventilation system according to the second embodiment will be described below, focusing on the differences from the first embodiment. Configurations that are not described are basically the same as those of the first embodiment. In the following description, configurations that are the same as or correspond to those of the first embodiment will be described with the same reference numerals as those used in the description of the first embodiment, as a general rule.

[0060] As shown in FIG. 5, the ventilation system according to this embodiment includes a ventilation device main body 10 and an air conditioner 30. The air conditioner 30 is capable of performing air conditioning in the room of the building 1. In the illustrated example, the air conditioner 30 is installed in the second room 1b and the third room 1c. The air conditioner 30 cools or heats the second room 1b and the third room 1c, which are multiple rooms, for example. The air conditioner 30 includes an air conditioner indoor unit 31 and an air conditioner outdoor unit 32. Note that the air conditioner outdoor unit 32 is not shown in FIG. 5.

[0061] The ventilation device main body 10 according to this embodiment includes a heat exchange element 19. The heat exchange element 19 is provided inside the housing of the ventilation device main body 10. Inside the housing of the ventilation device main body 10, the supply air duct 10a and the exhaust air duct 10b are formed to intersect. The heat exchange element 19 is provided at the intersection of the supply air duct 10a and the exhaust air duct 10b. The heat exchange element 19 is an element that exchanges heat between air passing through the supply air duct 10a and air passing through the exhaust air duct 10b.

[0062] The heat exchange element 19 is configured by alternately laminating flat heat exchange paper 19a and supporting paper 19b having a corrugated structure, as shown in Fig. 6, for example. The heat exchange paper 19a separates the supply air flow path from the exhaust air flow path. Heat exchange occurs between the supply air and the exhaust air through the heat exchange paper 19a. The supporting paper 19b supports the heat exchange paper 19a.

[0063] The multiple support papers 19b are arranged so that the longitudinal directions of the groove-shaped recesses in the corrugated structure are perpendicular to each other between two adjacent support papers 19b sandwiching the heat exchange paper 19a. A plurality of parallel air supply flow paths are formed between the support paper 19b on one side of the heat exchange paper 19a and the one side of the heat exchange paper 19a. A plurality of parallel air exhaust flow paths are formed between the support paper 19b on the other side of the heat exchange paper 19a and the other side of the heat exchange paper 19a.

[0064] When viewed from a direction perpendicular to the surface of the heat exchange paper 19a, the supply air flow path and the exhaust air flow path are perpendicular to each other. When air flows through these flow paths, the supply air in contact with one side of the heat exchange paper 19a and the exhaust air in contact with the other side of the heat exchange paper 19a exchange heat through the heat exchange paper 19a without mixing with each other. That is, the heat of the air with a higher temperature between the supply air and the exhaust air is transferred through the heat exchange paper 19a to the air on the opposite side of the heat exchange paper 19a. In this way, heat is exchanged between the supply air and the exhaust air passing through the heat exchange element 19.

[0065] The indoor air is sucked into the indoor exhaust duct 21 from the indoor exhaust port 23 by the exhaust fan 12, and is guided to the exhaust air passage 10b of the ventilation device main body 10. The indoor air then passes through the heat exchange element 19. At the same time, the outdoor fresh air passes through the outdoor air supply duct 24 by the air supply fan 11 and is guided to the air supply passage 10a of the ventilation device main body 10. The outdoor fresh air then passes through the heat exchange element 19. At this time, the indoor air and the outdoor fresh air circulate crosswise through the heat exchange element 19, and only heat is exchanged through the heat exchange element 19. The indoor air is then exhausted to the outdoors through the outdoor air exhaust duct 25. The outdoor fresh air passes through the indoor air supply duct 20 and is supplied to the room from the indoor air supply port 22.

[0066] In this way, the heat exchange element 19 exchanges heat between the air passing through the air supply section and the air passing through the air exhaust section. In this embodiment, by using the ventilator main body 10 having the heat exchange element 19, heat can be exchanged between the cold air during indoor cooling or the warm air during heating and the fresh air outdoors. As a result, it is possible to reduce the load of cooling or heating.

[0067] The ventilation device main body 10 may also include a bypass ventilation section 50 capable of supplying air by the air supply section and exhausting air by the exhaust section without passing through the heat exchange element 19. In FIG. 5, the bypass ventilation section 50 is omitted. The bypass ventilation section 50 has a bypass air supply duct, a bypass exhaust duct, a bypass switching damper, and the like. The bypass air supply duct is an air duct that runs from the outdoor air supply duct to the indoor air supply duct 20 in the housing of the ventilation device main body 10 without passing through the heat exchange element 19. The bypass exhaust duct is an air duct that runs from the indoor exhaust duct to the outdoor air exhaust duct 25 in the housing of the ventilation device main body 10 without passing through the heat exchange element 19. The bypass switching damper is a damper that switches whether the air passing through the housing of the ventilation device main body 10 passes through the air supply duct 10a, the exhaust duct 10b, and the heat exchange element 19, or the bypass air supply duct and the bypass exhaust duct.

[0068] Next, the configuration of the control system of the ventilation system according to this embodiment will be described with reference to Fig. 7. In the configuration example described here, in addition to the configuration of embodiment 1, an outdoor air temperature sensor that detects the outdoor air temperature is further provided as the environmental sensor 103. As shown in the figure, the ventilation device control unit 16 of the ventilation device main body 10 controls the bypass ventilation unit 50 in addition to the supply air fan 11 and the exhaust air fan 12. The control of the bypass ventilation unit 50 mainly refers to the control of the bypass switching damper of the bypass ventilation unit 50.

[0069] The ventilation device control unit 16 switches the bypass switching damper of the bypass ventilation unit 50 according to the outdoor air temperature detected by the outdoor air temperature sensor of the environment sensor 103. Specifically, the bypass switching damper of the bypass ventilation unit 50 is switched according to whether the outdoor air temperature is within a preset reference range. If the outdoor air temperature is equal to or higher than the upper limit of the reference range, or if the outdoor air temperature is equal to or lower than the lower limit of the reference range, the ventilation device control unit 16 determines that the outdoor air temperature is not within the preset reference range. On the other hand, if the outdoor air temperature is lower than the above-mentioned upper limit and higher than the lower limit, the ventilation device control unit 16 determines that the outdoor air temperature is within the preset reference range.

[0070] When the outdoor air temperature is not within the standard range, the ventilation device control unit 16 switches the bypass switching damper of the bypass ventilation unit 50 so that heat exchange is performed by the heat exchange element 19. When the outdoor air temperature is within the standard range, the ventilation device control unit 16 switches the bypass switching damper of the bypass ventilation unit 50 so that heat exchange is not performed by the heat exchange element 19. In this way, when the outdoor air temperature is within a relatively comfortable temperature range, ventilation can be performed without passing the air through the heat exchange element 19, reducing the pressure loss caused by passing the air through the heat exchange element 19 and reducing the power consumption of the ventilation device main body 10.

[0071] The ventilation device control unit 16 switches the bypass switching damper of the bypass ventilation unit 50 depending on the current season. That is, if the current season is summer or winter, the ventilation device control unit 16 switches the bypass switching damper of the bypass ventilation unit 50 so that heat exchange is performed by the heat exchange element 19. If the current season is spring or autumn, i.e., an intermediate season, the ventilation device control unit 16 switches the bypass switching damper of the bypass ventilation unit 50 so that heat exchange is not performed by the heat exchange element 19. The current season may be determined, for example, by the user operating the air conditioner input unit 35 or the like to input a schedule, or by obtaining information on the current date from the cloud server 104 or the like.

[0072] As shown in FIG. 7, the air conditioner 30 includes an air conditioner communication unit 33, an air conditioner information acquisition unit 34, an air conditioner input unit 35, an air conditioner control unit 36, and an air conditioner output unit 37. The air conditioner input unit 35 is provided, for example, as an operation panel of the air conditioner 30. The air conditioner input unit 35 is operated by a user to input parameters and the like related to the operation of the air conditioner 30. The operation panel may be provided with a display unit for displaying various information related to the air conditioner 30. The display unit of the operation panel is, for example, a liquid crystal display. A touch panel serving both as the air conditioner input unit 35 and the display unit may be provided. The air conditioner input unit 35 may also be provided in each room as a remote controller.

[0073] The air conditioner 30 includes, as its hardware, a computer equipped with a processor and memory, for example. The processor is also called a CPU (Central Processing Unit), central processing unit, processing unit, arithmetic unit, microprocessor, microcomputer, or DSP. The memory includes, for example, non-volatile or volatile semiconductor memory such as RAM, ROM, flash memory, EPROM, and EEPROM, or magnetic disks, flexible disks, optical disks, compact disks, mini disks, and DVDs.

[0074] Programs as software are stored in the memory of the air conditioner 30. The air conditioner 30 then performs preset processing by having a processor execute the programs stored in the memory, and as a result of the hardware and software working together, realizes the functions of each of the following sections: air conditioner communication unit 33, air conditioner information acquisition unit 34, air conditioner control unit 36, and air conditioner output unit 37.

[0075] The circuit of the air conditioner 30 may be formed as dedicated hardware, for example. A part of the circuit of the air conditioner 30 may be formed as dedicated hardware, and the circuit may be equipped with a processor and memory. Examples of a circuit partly formed as dedicated hardware include a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC, an FPGA, or a combination of these.

[0076] The air conditioner communication unit 33 transmits and receives various information via a communication network, etc. The air conditioner 30 can transmit and receive various information to and from the outside of the air conditioner 30 via the air conditioner communication unit 33. This communication may be performed either wired or wirelessly, and any communication protocol may be used as long as mutual communication can be performed.

[0077] In the illustrated configuration example, the air conditioner communication unit 33 is provided so as to be able to communicate with a cloud server 104 via a network router 100. The cloud server 104 provides a service of aggregating information from the weather information server 101, the device operation application 102, the environmental sensor 103, etc., and transmitting the aggregated information. Furthermore, the cloud server 104 provides a service for the ventilator main body 10 and the air conditioner 30 to operate in cooperation with each other.

[0078] For example, the ventilation device main body 10 transmits information as to whether the current control content is the above-mentioned first control or second control from the ventilation device communication unit 13 to the cloud server 104. The cloud server 104 transmits information relating to the current control content of the ventilation device main body 10 to the air conditioner 30. The air conditioner communication unit 33 receives information relating to the current control content of the ventilation device main body 10 transmitted from the cloud server 104. The air conditioner information acquisition unit 34 acquires information relating to the current control content of the ventilation device main body 10 received by the air conditioner communication unit 33. The air conditioner information acquisition unit 34 also acquires information input to the air conditioner input unit 35.

[0079] The air conditioner control unit 36 ​​determines the operation control content of the air conditioner 30 based on the information acquired by the air conditioner information acquisition unit 34. Specifically, the air conditioner control unit 36 ​​determines the operation content of the air conditioner indoor unit 31 and the air conditioner outdoor unit 32, etc. The operation content of the air conditioner indoor unit 31 is, for example, the air direction and air volume blown out from the air conditioner indoor unit 31. The operation content of the air conditioner outdoor unit 32 is, for example, the operation of the compressor, etc. The air conditioner output unit 37 generates a control signal of the control content determined by the air conditioner control unit 36 ​​and outputs it to the air conditioner indoor unit 31 and the air conditioner outdoor unit 32. Then, the air conditioner indoor unit 31 and the air conditioner outdoor unit 32 operate according to the control signal output from the air conditioner output unit 37. In this way, the air conditioner control unit 36 ​​controls the air conditioner indoor unit 31 and the air conditioner outdoor unit 32.

[0080] Particularly, in the ventilation system according to this embodiment, the air conditioner 30 is capable of performing linked air conditioning operation. The linked air conditioning operation is an operation of the air conditioner 30 performed in linkage with the outdoor air pollution suppression control of the ventilation device main body 10 when the ventilation device main body 10 is performing the above-mentioned second control, i.e., outdoor air pollution suppression control.

[0081] As described above, the air conditioner information acquisition unit 34 acquires information on the current control content of the ventilation device main body 10. Then, when the current control content of the ventilation device main body 10 is outdoor air pollution suppression control, the air conditioner control unit 36 ​​controls the air conditioner indoor unit 31 and the air conditioner outdoor unit 32 to make the air conditioner 30 perform linked air conditioning operation. In linked air conditioning operation, the operating capacity of the air conditioner 30 is strengthened. That is, when the air conditioner 30 is in cooling operation, the air conditioner control unit 36 ​​controls the air conditioner indoor unit 31 and the air conditioner outdoor unit 32 to lower the set temperature of the cooling operation, or increase the air volume, or both. Also, when the air conditioner 30 is in heating operation, the air conditioner control unit 36 ​​controls the air conditioner indoor unit 31 and the air conditioner outdoor unit 32 to raise the set temperature of the heating operation, or increase the air volume, or both.

[0082] In the ventilation system configured as described above, as in the first embodiment, the supply air volume and exhaust air volume are adjusted according to the pollution level of the outdoor air, and outdoor pollution can be efficiently prevented from flowing into the room. Moreover, in outdoor air pollution suppression control, the supply air volume relative to the exhaust air volume is increased compared to normal ventilation control. Therefore, the amount of outdoor air flowing into the room increases, and the indoor temperature, humidity, etc. become more susceptible to the influence of the outdoor air, but the influence of the outdoor air can be reduced by operating the air conditioner 30 in linked air conditioning mode. Therefore, outdoor pollution can be efficiently prevented from flowing into the room while preventing a decrease in indoor thermal comfort.

[0083] Furthermore, when an outdoor air temperature sensor is provided as the environmental sensor 103, the air conditioner control unit 36 ​​may perform linked air conditioning operation in response to the outdoor air temperature in addition to the control content of the ventilation device main body 10. In this case, if the current control content of the ventilation device main body 10 is outdoor air pollution suppression control, the air conditioner control unit 36 ​​further determines whether or not the outdoor air temperature detected by the outdoor air temperature sensor of the environmental sensor 103 is within the above-mentioned reference range. If the outdoor air temperature is not within the reference range, the air conditioner control unit 36 ​​causes the air conditioner 30 to perform linked air conditioning operation. On the other hand, even if the ventilation device main body 10 is in outdoor air pollution suppression control, if the outdoor air temperature is within the reference range, the air conditioner control unit 36 ​​does not cause the air conditioner 30 to perform linked air conditioning operation. In this case, when the ventilation device performs the second control, the air conditioner 30 performs linked air conditioning operation when the outdoor air temperature is not within the preset reference range.

[0084] In this way, by operating the linked air conditioning especially when the outside temperature is higher or lower than the standard range, it is possible to suppress an increase in the amount of power consumed by the air conditioner 30, while simultaneously suppressing a decrease in thermal comfort and suppressing the inflow of pollution into the room.

[0085] Next, an example of the operation of the ventilation device according to this embodiment will be described with reference to the flow charts of Fig. 8 and Fig. 9. Fig. 8 shows an example of the operation of the ventilation system according to this embodiment. In this example, first, in step S301, the ventilation device information acquisition unit 14 acquires the state of the ventilation device main body 10. In addition, the air conditioner information acquisition unit 34 acquires the state of the air conditioner 30. The state of the ventilation device main body 10 referred to here includes the operation parameters of the ventilation device input to the ventilation device input unit 15, the operation signal transmitted from the device operation application 102, etc. In addition, the state of the air conditioner 30 referred to here includes the operation parameters of the air conditioner 30 input to the air conditioner input unit 35, the operation signal transmitted from the device operation application 102, etc.

[0086] In the next step S302, the ventilation device control unit 16 determines whether or not to perform automatic operation control based on the device state acquired in step S301. That is, if the operation parameters and operation signals indicate that automatic operation is set, the ventilation device control unit 16 decides to perform automatic operation control. On the other hand, if automatic operation is not set, the ventilation device control unit 16 decides not to perform automatic operation control. If automatic operation control is not to be performed, the ventilation device control unit 16 next performs the process of step S303.

[0087] In step S303, the ventilation device control unit 16 performs manual operation control of the ventilation device. That is, the ventilation device control unit 16 controls the intake fan 11 and the exhaust fan 12 based on the set value of the ventilation amount input to the ventilation device input unit 15 or the device operation application 102.

[0088] On the other hand, in step S302, when automatic operation control is performed, the ventilation device control unit 16 next performs the process of step S304. In step S304, the ventilation device control unit 16 starts the automatic operation control. At the start of the automatic operation control, the ventilation device control unit 16 performs, for example, the above-mentioned first control, i.e., normal ventilation control. In this case, the ventilation device control unit 16 controls the supply air fan 11 so that the supply air volume becomes the first supply air volume, and controls the exhaust air fan 12 so that the exhaust air volume becomes the first exhaust air volume.

[0089] In the next step S305, the ventilation device information acquisition unit 14 acquires external information. The external information here refers to the external environment data described above. The external environment data includes information on the degree of pollution of the outside air (at least one of a forecast value and a real value). In addition, the air conditioner information acquisition unit 34 acquires the outside air temperature detected by the outdoor air temperature sensor of the environment sensor 103. After step S305, the ventilation device control unit 16 then performs the process of step S306.

[0090] In step S306, the ventilation device control unit 16 determines whether the pollution level of the outside air is equal to or higher than the standard based on the external information, i.e., the external environment data, acquired in step S305. If the pollution level of the outside air is not equal to or higher than the standard, the ventilation device control unit 16 then performs the process of step S307. In step S307, the ventilation device control unit 16 performs normal ventilation control, i.e., the first control described above.

[0091] On the other hand, if the pollution level of the outside air is equal to or higher than the standard in step S306, the ventilation device control unit 16 then performs the process of step S308. In step S308, the ventilation device control unit 16 performs the outside air pollution suppression control, i.e., the second control described above. In the example described here, in the subsequent step S309, the ventilation device control unit 16 controls one or both of the supply air fan 11 and the exhaust air fan 12 so that the supply air volume is greater than the exhaust air volume. The ventilation device control unit 16 increases the operation volume of the supply air fan 11 by a certain amount from the initial state, or decreases the operation volume of the exhaust air fan 12 by a certain amount from the initial state, or performs both.

[0092] After step S309, in step S310, the air conditioner control unit 36 ​​determines whether or not the outside air temperature acquired in step S305 is within the above-mentioned reference range. That is, the air conditioner control unit 36 ​​determines whether the outside air temperature is equal to or higher than the upper limit of the reference range or equal to or lower than the lower limit of the reference range. If the outside air temperature is equal to or higher than the upper limit of the reference range or equal to or lower than the lower limit of the reference range, that is, if the outside air temperature is not within the reference range, the air conditioner control unit 36 ​​next performs the process of step S311.

[0093] In step S311, the air conditioner control unit 36 ​​controls the air conditioner 30 to perform the linked air conditioning operation described above. On the other hand, if the outside air temperature is neither above the upper limit of the reference range nor below the lower limit of the reference range, that is, if the outside air temperature is within the reference range, the air conditioner control unit 36 ​​then performs the process of step S312. In step S312, the air conditioner 30 does not perform the linked air conditioning operation described above. After steps S311 and S312, the ventilator control unit 16 and the air conditioner control unit 36 ​​perform the process of step S313.

[0094] In step S313, the ventilation device control unit 16 maintains the operation state of step S309 for a preset fixed time. At the same time, the air conditioner control unit 36 ​​maintains the operation state of step S311 or S312 for a preset fixed time. Then, when the fixed time has elapsed, the ventilation device and air conditioner 30 return to step S305 and continue operation.

[0095] Next, an example of the operation of the air conditioner 30 in the linked air conditioning operation in step S311 will be described with reference to the flow diagram in Fig. 9. When the linked air conditioning operation in step S311 is started, first, in step S401, the air conditioner information acquisition unit 34 acquires the operating state of the air conditioner 30. In the following step S402, the air conditioner control unit 36 ​​determines whether the air conditioner 30 is operating based on the operating state of the air conditioner 30 acquired in step S401. If the air conditioner 30 is operating, the air conditioner control unit 36 ​​then performs the process of step S407. In step S407, the air conditioner control unit 36 ​​controls the air conditioner indoor unit 31 and the air conditioner outdoor unit 32 to increase the operating capacity of the air conditioner 30.

[0096] On the other hand, if the air conditioner 30 is not operating in step S402, the air conditioner control unit 36 ​​then performs the process of step S403. In step S403, the air conditioner control unit 36 ​​starts the operation of the air conditioner 30. In the following step S404, the air conditioner control unit 36 ​​determines whether the outside air temperature is equal to or higher than the upper limit of the reference range described above.

[0097] If the outdoor temperature is equal to or higher than the upper limit of the reference range, the air conditioner control unit 36 ​​then performs the process of step S405. In this case, since the outdoor temperature is high, in step S405, the air conditioner control unit 36 ​​controls the air conditioner indoor unit 31 and the air conditioner outdoor unit 32 so that the air conditioner 30 performs cooling operation.

[0098] On the other hand, if the outdoor temperature is not equal to or higher than the upper limit of the reference range in step S404, the air conditioner control unit 36 ​​next performs the process of step S406. In this case, the outdoor temperature is equal to or lower than the lower limit of the reference range. Therefore, since the outdoor temperature is low, in step S406 the air conditioner control unit 36 ​​controls the air conditioner indoor unit 31 and the air conditioner outdoor unit 32 so that the air conditioner 30 performs heating operation.

[0099] In the ventilation system according to this embodiment, the control contents of the ventilation device main body 10 and the air conditioner 30 may be determined by the cloud server 104. Moreover, the ventilation device main body 10 does not need to include the heat exchange element 19. In this case, the ventilation system includes the ventilation device main body 10 without the heat exchange element 19 and the air conditioner 30. [Industrial Applicability]

[0100] INDUSTRIAL APPLICABILITY The present disclosure can be used for a ventilation device that performs type 1 ventilation in which both air supply and exhaust are performed by mechanical ventilation, and for a ventilation system that has a ventilation device that performs type 1 ventilation and an air conditioner. [Explanation of symbols]

[0101] 1. Building 1a Room 1 1b Room 2 1c Room 3 10. Ventilator body 10a Air supply duct 10b Exhaust duct 11 Air supply fan 12 Exhaust fan 13 Ventilation system communication unit 14 Ventilation device information acquisition unit 15 Ventilation device input section 16 Ventilation device control section 17 Ventilation device output section 18 Air Purifier 19 Heat exchange element 19a Heat exchange paper 19b Support paper 20 Indoor air supply duct 21 Indoor exhaust duct 22 Indoor air supply vent 23 Indoor exhaust vent 24 Outdoor air supply duct 25 Outside air exhaust duct 30 Air conditioner 31 Air conditioner indoor unit 32 Air conditioner outdoor unit 33 Air conditioner communication section 34 Air conditioner information acquisition section 35 Air conditioner input section 36 Air conditioner control unit 37 Air conditioner output section 40 Ventilation vent 50 Bypass ventilation section 100 Network Router 101 Weather Information Server 102 Device operation application 103 Environmental Sensor 104 Cloud Server

Claims

1. An air supply section that introduces outside air from outside the room and supplies it to the room; An exhaust unit that exhausts air from within the room to the outside of the room; an air supply amount change unit that changes the amount of air supplied to the air supply unit; an exhaust amount changing unit that changes an exhaust amount of the exhaust unit; an air purifying unit that purifies the air supplied to the room by the air supply unit; a data acquisition unit that acquires outdoor air environment data including at least information regarding the degree of outdoor air pollution from an external data source; A control unit that controls the supply air amount changing unit and the exhaust air amount changing unit; a heat exchange element that exchanges heat between air passing through the air supply section and air passing through the exhaust section; a bypass ventilation section capable of supplying air by the air supply section and exhausting air by the exhaust section without passing through the heat exchange element; an outdoor air temperature sensor for detecting the outdoor air temperature; The control unit is When the degree of pollution of the outside air increases above a preset standard based on the outside air environment data, the first control is switched to the second control, and the second control is executed; When the detection result of the outdoor air temperature sensor is equal to or higher than an upper limit value of a preset reference range, or when the detection result of the outdoor air temperature sensor is equal to or lower than a lower limit value of the reference range, the bypass ventilation unit is controlled so that heat exchange is performed by the heat exchange element; In the first control, the supply air amount is set to a first supply air amount and the exhaust air amount is set to a first exhaust air amount; In the second control, the supply air amount is set to a second supply air amount and the exhaust air amount is set to a second exhaust air amount; A ventilation device wherein an increase in the second supply air volume relative to the first supply air volume is greater than an increase in the second exhaust air volume relative to the first exhaust air volume.

2. An air supply section that introduces outside air from outside the room and supplies it to the room; An exhaust unit that exhausts air from within the room to the outside of the room; an air supply amount change unit that changes the amount of air supplied to the air supply unit; an exhaust amount changing unit that changes an exhaust amount of the exhaust unit; an air purifying unit that purifies the air supplied to the room by the air supply unit; a data acquisition unit that acquires outdoor air environment data including at least information regarding the degree of outdoor air pollution from outside; A control unit that controls the supply air amount changing unit and the exhaust air amount changing unit; a heat exchange element that exchanges heat between air passing through the air supply section and air passing through the exhaust section; a bypass ventilation section capable of supplying air by the air supply section and exhausting air by the exhaust section without passing through the heat exchange element; an outdoor air temperature sensor for detecting the outdoor air temperature; The control unit is When the degree of pollution of the outside air increases above a preset standard based on the outside air environment data, the first control is switched to the second control, and the second control is executed; When the detection result of the outdoor air temperature sensor is equal to or higher than an upper limit value of a preset reference range, or when the detection result of the outdoor air temperature sensor is equal to or lower than a lower limit value of the reference range, the bypass ventilation unit is controlled so that heat exchange is performed by the heat exchange element; In the first control, the supply air amount is set to a first supply air amount and the exhaust air amount is set to a first exhaust air amount; In the second control, the supply air amount is set to a second supply air amount and the exhaust air amount is set to a second exhaust air amount; A ventilation device wherein an amount of reduction of the second supply air volume relative to the first supply air volume is smaller than an amount of reduction of the second exhaust air volume relative to the first exhaust air volume.

3. Further comprising an outdoor air quality sensor for detecting the outdoor air quality, 3. The ventilation device according to claim 1, wherein the control unit controls the supply air amount changing unit and the exhaust air amount changing unit in response to a detection result of the outdoor air quality sensor.

4. An indoor air quality sensor for detecting the indoor air quality, The ventilation device according to claim 1 , wherein the control unit controls the supply air amount changing unit and the exhaust air amount changing unit in response to a detection result of the indoor air quality sensor.

5. 5. The ventilation device according to claim 1, wherein the air purification unit comprises one or more of a dust filter, an electric dust collector, a gas removal filter, an ultraviolet irradiator, an ion generator, and an ozone generator.

6. A ventilation device according to any one of claims 1 to 5; An air conditioner capable of performing air conditioning in the room, The ventilation system includes an air conditioner that performs linked air conditioning operation when the ventilation device performs the second control.

7. A ventilation device according to any one of claims 1 to 5; An air conditioner capable of performing air conditioning in the room, The ventilation system is configured such that, when the ventilation device performs the second control, the air conditioner performs linked air conditioning operation when the outdoor air temperature is not within a preset reference range.

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