JP7308969B2 - ventilator - Google Patents

Description

The present invention relates to a ventilator for exchanging outside air with room air.

In recent years, some companies have incorporated SDGs (Sustainable Development Goals) into their management strategies, or ESG (Environment, Social, and Governance) investment has spread. Thus, there is a growing awareness of contributing to society or the environment.

In office buildings as well, the productivity or health of residents is becoming one of the building evaluation axes, and a standard called WELL is one of the evaluation axes.

The WELL standard requires more ventilation than the conventional standard, which increases the maximum air conditioner load. Therefore, in order to satisfy the WELL standard, a model with a larger capacity than the current one is selected at the time of design.

In general, the operating conditions of air conditioners in offices are such that the maximum load factor is around 50% and the most frequent load factor is around 30%. If a model with a larger capacity than the current one is selected to satisfy the WELL standard, the most frequent load factor will be even lower.

When the load factor decreases, the compressor starts and stops for a longer period of time, and the compressor operates in a region of low energy efficiency.

In response to such problems, control has been proposed to operate in a state of high energy efficiency by stopping operation of some refrigerant systems when the load is low and increasing the load factor per system (for example, Patent document 1). This operation is hereinafter referred to as system integration operation.

In this case, temperature unevenness becomes a problem in each space in which the stop system and the operation system are in charge of temperature control. In order to suppress such temperature unevenness, it has been proposed to install a circulator (Patent Document 2).

JP-A-2003-65588 JP 2013-238376 A

However, increasing the air volume of a ventilation device and adding a circulator to obtain a ventilation volume that satisfies the WELL standard in an existing office poses the problem of increased installation costs.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a ventilator capable of providing an air volume that satisfies the WELL standard and also having the function of a circulator.

The present invention relates to a ventilator comprising an air supply channel for outside air supplied to a room and an exhaust channel for exhaust air discharged from the room.
The ventilator of this invention is
a total heat exchanger through which the outside air in the air supply channel and the exhaust air in the exhaust channel pass;
A circulation mode in which the supply of the outside air through the air supply passage is cut off, the discharge of the exhaust air through the exhaust passage is cut off, and the air supply passage and the exhaust passage are communicated, and the circulation mode is canceled. a mode in which the outside air is supplied from the air supply channel to the room, the exhaust gas is discharged from the exhaust channel, and communication between the air supply channel and the exhaust channel is cut off. a damper mechanism that switches to a release mode that is
with
The circulation operation in which the air in the room circulates is
Executed in the circulation mode, the air in the room circulates through the exhaust passage, the supply air passage and the room without passing through the total heat exchanger;
The ventilation operation for ventilating the room includes:
Executed in the release mode.

According to the present invention, it is possible to provide a ventilator that can provide an air volume that satisfies the WELL standard and also has the function of a circulator.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram of the first embodiment, showing an air conditioning system 1; FIG. 7 is a view of the first embodiment, showing a room 710 when the ventilator 100 is performing a ventilation operation; FIG. 3 is a view of the first embodiment, and is a view of the ventilator 100 extracted from FIG. 2; FIG. 10 is a diagram of the first embodiment, and is a perspective view transparently showing the basic configuration of the ventilator 100 in ventilation operation. Fig. 7 is a diagram of the first embodiment, showing room 710 when ventilation device 100 is performing circulation operation; FIG. 6 is a view of the first embodiment, and is a view of the ventilator 100 extracted from FIG. 5; FIG. 11 is a diagram of the first embodiment, and is a perspective view transparently showing the basic configuration of the ventilator 100 in circulation operation. FIG. 2 is a diagram of the first embodiment, and is a diagram for explaining system-intensive operation; Fig. 10 is a diagram of the first embodiment, showing the effect of system integration operation; Fig. 2 is a diagram of the first embodiment and shows a hardware configuration of a control device 200; 4 is a diagram of the first embodiment and is a flow chart for explaining the operation of the ventilation device 100 and the control device 200 in the air conditioning system 1. FIG. FIG. 10 is a diagram of the second embodiment and is a flow chart for explaining the operation of the ventilator 100 and the control device 200 in the air conditioning system 1. FIG. FIG. 10 is a diagram of the third embodiment, and is a flow chart for explaining the operation of the ventilator 100 and the control device 200 in the air conditioning system 1. FIG. FIG. 12 is a diagram of the third embodiment, showing a hardware configuration of a modified example of the control device 200;

Embodiment 1.
An air conditioning system 1 according to Embodiment 1 will be described with reference to FIGS. 1 to 11. FIG.
FIG. 1 shows an air conditioning system 1 of Embodiment 1. FIG. FIG. 1 is a plan view of room 710 . The air conditioning system 1 includes a plurality of ventilators 100 , a first air conditioner 601 , a second air conditioner 602 and a plurality of ventilators 630 . In FIG. 1, two ventilators 100 and two ventilators 630 are arranged in the room 710 . The air conditioning system 1 has a ventilation volume that satisfies the WELL standard due to the ventilation device 630 and the ventilation device 100 .

A feature of the first embodiment is the ventilator 100 . The ventilator 100 has a control device 200 . In FIG. 1 , two ventilators 100 share one controller 200 . The ventilator 100 has both the function of a ventilator that performs a ventilation operation to ventilate air and the function of a circulation device that performs a circulation operation to circulate air. The ventilator 630 is an existing ventilator and has only the function of a ventilator and does not have the function of a circulator.

The first air conditioner 601 includes a direct expansion outdoor unit 621 used as an internal air conditioner and a plurality of indoor units 610 connected to the outdoor unit 621 . In FIG. 1 , four indoor units 610 are connected to an outdoor unit 621 . The second air conditioner 602 includes a direct expansion outdoor unit 622 used as an internal air conditioner and a plurality of indoor units 610 connected to the outdoor unit 622 . In FIG. 1 , four indoor units 610 are connected to an outdoor unit 622 .

Although the direct expansion refrigerant circuit of the first air conditioner 601 is not shown, the first air conditioner 601 includes a compressor, a four-way valve, an outdoor heat exchanger, an expansion valve, an indoor heat exchanger, an outdoor heat exchanger, and a It is equipped with an air blower for dexterity and an air blower for indoor heat exchange. The configuration of the second air conditioner 602 is also the same as that of the first air conditioner 601 . The indoor unit 610 includes an expansion valve, an indoor heat exchanger, and a fan for the indoor heat exchanger. FIG. 4 showing a state in which four indoor units 610 are connected to one outdoor unit is an example, and one or more indoor units 610 are connected to the outdoor unit. The compressor includes a compressor frequency adjustment section and an evaporating temperature detection section. By switching the four-way valve of the outdoor unit, it is possible to switch between the cooling operation and the heating operation.

<Ventilator 100>
FIG. 2 shows a room 710 when the ventilator 100 is in ventilation mode. The upward direction is the Z direction, and the left direction is the X direction.
FIG. 3 shows the state of the ventilation operation by extracting the ventilator 100 in FIG.
FIG. 4 is a perspective view transparently showing the basic configuration of the ventilator 100 in ventilation operation. In FIG. 4, the first dampers 21 to be described later are indicated by M, N, O and P, the second dampers 22 are indicated by I, J, K and L, and the openings leading to the exhaust passage 42 are Q and R , S and T. The coordinates shown in FIGS. 2-4 are the same. The configuration of the ventilator 100 will be described with reference to FIGS. 2 to 4. FIG. As shown in FIG. 2, the ventilator 100 is arranged in the ceiling space 712 . An inner air supply port 81 and an inner air exhaust port 82 are installed in the ceiling 711 . The control device 200 includes an air supply channel 41 for outside air supplied to the room 710 and an exhaust channel 42 for exhaust air discharged from the room 710 .

As shown in FIGS. 2 and 3, the ventilator 100 has an air supply passage 41 for supplying outside air into the room as supply air, and an exhaust passage 42 for discharging the air in the room 710 from the room 710 as exhaust air. The ventilator 100 includes a total heat exchanger 10, a damper mechanism 20, an air supply fan 31, an exhaust fan 32, an inner external air duct 51a, an outer external air duct 51b, an inner exhaust duct 52a and an outer exhaust duct 52b. Further, the ventilator 100 has a first partition plate 61, a second partition plate 62 and a housing 70, as shown in FIG. 4, the first partition plate 61 is indicated by E, K, L and H. As shown in FIG. The second partitions 62 are designated F1, F, G and G1. In FIG. 4 the enclosures 70 are indicated by A1, B1, C1, D1, A2, B2, C2 and D2. The first partition plate 61 and the second partition plate 62 sandwich the total heat exchanger 10 therebetween. That is, the total heat exchanger 10 is arranged between the first partition plate 61 and the second partition plate 62 in the X1 direction, which is the direction in which the outside air travels inside the housing 70 . The first partition plate 61 and the second partition plate 62 partition the housing 70 vertically. Specifically, the first partition plate 61 divides the space in the X1 direction from the total heat exchanger 10 into two in the Z direction, which is the direction in which the air in the room 710 is sucked into the housing 70 . Further, the second partition plate 62 divides the space in the X2 direction from the total heat exchanger 10 into two in the Z direction.

The air supply fan 31 is arranged in the air supply passage 41 and the exhaust fan 32 is arranged in the exhaust passage 42 . The air supply fan 31 sucks outside air into the air supply channel 41 , and the exhaust fan 32 sucks room air into the exhaust channel 42 . The damper mechanism 20 has a first damper 21 and a second damper 22 .
In the ventilator 100, the first damper 21 allows the air supply channel 41 and the exhaust channel 42 to communicate with each other during the circulation operation. Further, during the circulation operation, the damper mechanism 20 closes the air supply passage 41 with the first damper 21 so that the outside air does not flow into the air supply passage 41 , and the second damper 21 prevents the exhaust from flowing out from the exhaust passage 42 . The damper 22 closes the exhaust flow path 42 .
The damper mechanism 20 will be explained. The damper mechanism 20 is switched between a circulation mode and a release mode under the control of the damper control unit 213 . The circulation mode is a mode in which the supply of outside air through the air supply passage 41 is blocked, the discharge of exhaust air through the exhaust passage 42 is blocked, and the air supply passage 41 and the exhaust passage 42 are communicated with each other. The cancellation mode is a mode in which the circulation mode is canceled, in which outside air is supplied from the air supply passage 41 to the room 710, exhaust air is discharged from the exhaust passage 42, and the air supply passage 41 and the exhaust passage 42 are closed. This is a mode that cuts off communication between
In the circulation mode, the air supply fan 31 is in an operating state, the exhaust fan 32 is in a stopped state, the first damper 21 is in a second state ST12 described later, and the second damper 22 is in a second state ST22 described later. In the release mode, the air supply fan 31 is in an operating state, the exhaust fan 32 is in an operating state, the first damper 21 is in a first state ST11 described later, and the second damper 22 is in a first state ST21 described later.
The circulation operation in which the air in the room 710 is circulated is performed in the circulation mode of the damper mechanism 20, and the air in the room 710 is circulated through the exhaust flow path 42, the air supply flow path 41, and the room 710 without passing through the total heat exchanger 10. circulating. The ventilation operation for ventilating the room 710 is performed in the release mode of the damper mechanism 20 .

<Ventilation operation>
The ventilation operation by the ventilator 100 will be described with reference to FIGS. 2 to 4. FIG. As shown in FIG. 3 , in the ventilation operation, the total heat exchanger 10 passes the outside air in the supply air passage 41 and the exhaust air in the exhaust passage 42 . The outside air in the air supply channel 41 and the exhaust air in the exhaust channel 42 exchange sensible heat and latent heat when passing through the total heat exchanger 10 . In the ventilation operation, the air supply fan 31 and the exhaust fan 32 are operating. In the ventilation operation, the first damper 21 is in the first state ST11 in which the first partition plate 61 is fitted. In the ventilation operation state, the first damper 21 is in the first state ST11 in which it fits into the opening 63 formed in the first partition plate 61 and closes the opening 63 . Apertures 63 are shown in FIGS. In FIG. 4, the first partitions 61 are indicated by E, K, L and H. As shown in FIG. The openings 63 in the first partition plate 61 are indicated by M, N, O and P. As shown in FIG.

The first damper 21 fits into the opening 63 . The first damper 21 blocks the air in the room 710 from flowing into the air supply passage 41 through the opening 63 . In the state of ventilation operation, the second damper 22 is in the first state ST21 parallel to the first partition plate 61 . That is, the second damper 22 is arranged below the first partition plate 61 in the first state ST21 facing the first partition plate 61 . As shown in FIG. 3, the air supply fan 31 draws outside air from the outer air supply port 91 into the air supply passage 41, passes through the total heat exchanger 10 from bottom to top, and passes through the air supply fan 31. , is supplied to the room 710 from the inner air supply port 81 of the inner fresh air duct 51a. By the exhaust fan 32, the air in the room 710 is sucked from the inner exhaust port 82 into the exhaust passage 42, passes through the exhaust fan 32, passes through the total heat exchanger 10 from bottom to top, and is discharged outside the outer exhaust duct 52b. It is discharged from the exhaust port 92 . In the ventilation operation state, both the first air conditioner 601 and the second air conditioner 602 are operating. In FIG. 2, the indoor unit 610 of the first air conditioner 601 is indicated as an indoor unit 610a, and the indoor unit 610 of the second air conditioner 602 is indicated as an indoor unit 610b. Is going. The state of air conditioning is described as A/C ON. The indoor unit 610a and the indoor unit 610b are performing cooling operation or heating operation.

<System-intensive operation>
Circulation operation by the ventilator 100 will be described with reference to FIGS. 5 to 9. FIG. 5 to 7 correspond to FIGS. 2 to 4 in ventilation operation.
FIG. 5 shows the room 710 when the ventilator 100 is operating in circulation.
The upward direction is the Z direction, and the left direction is the X direction.
FIG. 6 shows the state of circulation operation by extracting the ventilator 100 in FIG.
FIG. 7 is a perspective view transparently showing the basic configuration of the ventilator 100 operating in circulation.
FIG. 8 is a diagram for explaining system integration operation.
FIG. 9 shows the effect of system integration operation.

In Embodiment 1, when the air-conditioning system 1 performs system-integrated operation, the ventilator 100 performs circulation operation. Therefore, first, system integration operation will be described with reference to FIG. In FIG. 8, only the first air conditioner 601 and the second air conditioner 602 are shown for explanation. System integration operation will be explained below.
The system-intensive operation means that at least one of a plurality of unit systems including a plurality of indoor units 610 installed in a room 710 and an outdoor unit that air-conditions the plurality of indoor units 610 is selected. It refers to operation in which the unit system is stopped and the remaining unit system is operated.
Referring to FIG. 8, there are a first system 701 and a second system 702 as two unit systems to which eight indoor units 610 installed in a room 710 are divided. The first system 701 corresponds to the first air conditioner 601 , and the second system 702 corresponds to the second air conditioner 602 . An outdoor unit 621 that air-conditions the four indoor units 610 belonging to the first system 701 is provided in the first system 701, and an outdoor unit 622 that air-conditions the four indoor units 610 belonging to the second system 702 is the second system. It is provided in system 702 . The multiple systems consist of a first system 701 and a second system 702 . In the example of FIG. 8, the system integration operation is an operation in which one of the first system 701 and the second system 702 is stopped and the remaining unit systems are operated.

FIG. 8 shows a state in which the first system 701 is stopped and the second system 702 is operated. In the first system 701, the separation between the indoor unit 610 and the pipe 611 indicates that the first system 701 is out of operation. When the load of the first air conditioner 601 or the second air conditioner 602 is low, the energy efficiency of the air conditioning system 1 may be higher if one of the unit systems is stopped. Therefore, when the energy efficiency is increased by stopping any unit system, the operation of the unit system is stopped and the load factor for each operating unit system is increased to increase the energy efficiency.

FIG. 9 is a graph showing COP (Coefficient Of Performance) improvement during grid-intensive operation. The horizontal axis is the load factor and the vertical axis is the COP. For example, in FIG. 8, point 310 corresponds to the operating state of two systems, and point 320 corresponds to system integration operation with one system stopped. Moving from point 310 to point 320 improves the COP. The control device 200 determines whether or not the system stop improves the energy efficiency. This determination will be described later.

The inner air supply port 81 and the inner exhaust port 82 of the ventilator 100 are arranged at positions where the temperature unevenness in the room 710 is reduced when the ventilator 100 performs circulation operation during system integration operation of the air conditioning system 1 . In addition, the ventilator 100 is arranged at a position where an increase in the concentration of carbon dioxide in the room 710 can be suppressed during the ventilation operation. That is, the ventilator 100 is arranged at a position where the ventilation efficiency is high during the ventilation operation.

<Circulation operation>
The ventilation operation by the ventilator 100 will be described with reference to FIGS. 5 to 7. FIG. In the circulation operation, the air supply fan 31 is operating and the exhaust fan 32 is stopped. In circulation operation, the first damper 21 is in the second state ST12 as shown in FIG. The second state ST12 is a state in which the first damper 21 rotates 90 degrees from the first state ST11 and openings 63 indicated by M, N, O and P appear. The first damper 21 causes the opening 63 to appear, so that the air supply channel 41 and the exhaust channel 42 communicate with each other. In the state of circulating operation, the second damper 22 rotates 90 degrees from the first state ST21 and enters the second state ST22 perpendicular to the first partition plate 61 to block the exhaust passage 42 . The exhaust fan 32 is stopped. On the other hand, the air supply fan 31 is operating. Air in the room 710 is sucked from the inner exhaust port 82 into the exhaust channel 42 by the air supply fan 31 and circulates through the opening 63 , the air supply channel 41 , the inner air supply port 81 and the room 710 . Note that in the state of circulation operation, the first air conditioner 601 is stopped due to system integration operation, and only the second air conditioner 602 is in operation. In FIG. 5, the indoor unit 610a is blowing air, and only the indoor unit 610b is performing air conditioning.

<Control device 200>
FIG. 10 shows the hardware configuration of the control device 200. As shown in FIG. Control device 200 is a computer. The control device 200 includes a processor 210 and other hardware such as a main memory device 220 , an auxiliary memory device 230 , an input interface 240 , an output interface 250 and a communication interface 260 . Below, the interface is written as IF. Processor 210 is connected to and controls other hardware via signal lines 270 .

The control device 200 includes an aggregation determination section 211, a determination section 212, and a damper control section 213 as functional elements. Functions of the aggregation determination unit 211 , the determination unit 212 and the damper control unit 213 are implemented by the control program 201 . The control program 201 is stored in the auxiliary storage device 230 .

Processor 210 is a device that executes control program 201 . The control program 201 is a program that realizes the functions of the aggregation determination unit 211 , the determination unit 212 and the damper control unit 213 . The processor 210 is an IC (Integrated Circuit) that performs arithmetic processing. Specific examples of the processor 210 are a CPU (Central Processing Unit), a DSP (Digital Signal Processor), and a GPU (Graphics Processing Unit).

The main storage device 220 is a storage device that stores data. Specific examples of the main memory device 220 are SRAM (Static Random Access Memory) and DRAM (Dynamic Random Access Memory). The main memory device 220 holds the computation results of the processor 210 .
The auxiliary storage device 230 is a storage device that stores data in a non-volatile manner. A specific example of the auxiliary storage device 230 is an HDD (Hard Disk Drive). The auxiliary storage device 230 is a portable recording medium such as an SD (registered trademark) (Secure Digital) memory card, a NAND flash, a flexible disk, an optical disk, a compact disk, a Blu-ray (registered trademark) disk, or a DVD (Digital Versatile Disk). It can be.

The input IF 240 is a port to which various devices are connected and data of the various devices are input. The output IF 250 is a port to which various devices are connected and through which control signals are output from the processor 210 to the various devices. The communication IF 260 is a communication port through which various devices and the processor 210 communicate. In FIG. 10 , the communication IF 260 is connected with the first damper 21 , the second damper 22 , the air supply fan 31 , the exhaust fan 32 , the outdoor unit 621 , the outdoor unit 622 and the human sensor 641 . The aggregation determination unit 211 communicates with the outdoor units 621 and 622 . The damper control unit 213 controls the first damper 21 , the second damper 22 , the air supply fan 31 and the exhaust fan 32 .

The processor 210 loads the control program 201 from the auxiliary storage device 230 to the main storage device 220, reads the control program 201 from the main storage device 220, and executes it. The main storage device 220 stores not only the control program 201 but also an OS (Operating System). The processor 210 executes the control program 201 while executing the OS.

The control device 200 may include multiple processors that replace the processor 210 . Multiple processors share the execution of the control program 201 . Each processor, like processor 210 , is a device that executes control program 201 .

Data, information, signal values and variable values that are used, processed or output by control program 201 are stored in main memory 220, auxiliary memory 230, or registers or cache memory within processor 210. FIG. In the control program 201, each processing, each procedure, or each process is converted to a computer by replacing the "section" of each section of the aggregation determination unit 211, the determination unit 212, and the damper control unit 213 with "processing", "procedure", or "step". This is the program to run.

The control method is a method performed by the control device 200, which is a computer, executing the control program 201. FIG. The control program 201 may be stored in a computer-readable recording medium and provided, or may be provided as a program product.

Note that the operation of the control device 200 corresponds to the control method. The operation of the control device 200 corresponds to the processing of the control program 201 .

<***Explanation of action 1***>
FIG. 11 is a flow chart explaining the operation of the ventilation device 100 and the control device 200 in the air conditioning system 1. FIG. The operation of the ventilator 100 and the control device 200 will be described with reference to FIG.

<Step S11>
In step S11, as shown in FIG. 2, both the first system 701 and the second system 702 are in operation.

<Step S12>
In step S<b>12 , the integration determination unit 211 of the control device 200 acquires determination information from the outdoor units 621 and 622 to be used for determining whether system integration operation is to be performed. The aggregation determination unit 211 is connected to the outdoor units 621 and 622 via the communication IF 260, and acquires the operating states of the outdoor units 621 and 622 from the outdoor units 621 and 622 as determination information. . The operating state is, for example, the operating frequencies of the compressors of the outdoor units 621 and 622 .

<Step S13>
In step S13, the integration determination unit 211 determines whether system integration operation is to be performed based on the determination information. That is, the integration determination unit 211 determines whether to stop one of the first system 701 and the second system 702 that are in operation and to integrate the operation to the other by referring to the determination information. Specifically, the integration determination unit 211 uses the operating frequencies of the compressors of the outdoor unit 621 and the outdoor unit 622 to determine the relationship between the load factor and the COP shown in FIG. to determine whether is higher. When the COP becomes high, the integration determination unit 211 determines to execute system integration operation. If YES in step S13, the process proceeds to step S14. When the COP does not increase (NO in step S13), the integration determination unit 211 determines not to execute system integration operation, and the process proceeds to step S16.

<Step S14>
In step S14, the integration determination unit 211 stops one of the two systems and executes system integration operation. When the system integration operation is executed, which system is to be stopped is set in the program that implements the integration determination unit 211 . The aggregation determination unit 211, for example, stops the system with the lower COP among the two systems. In this example, it is assumed that the aggregation determination unit 211 stops the first system 701 .

<Step S15>
In step S15, the aggregation determination unit 211 generates start information. Start information is information that notifies the start of system operation.

<Step S16>
In step S16, the aggregation determination unit 211 continues the operation of the two systems.

<Step S17>
In step S17, the aggregation determination unit 211 generates continuation information. The continuation information is information for notifying that the system-integrated operation is not executed and the operation in the two systems is to be continued.

<Step S18>
In step S18, the aggregation determination unit 211 outputs either continuation information or start information.

<Step S19>
The determination unit 212 acquires relational information related to the air state of the room 710 and determines which of the circulation operation and the ventilation operation is to be performed based on the relational information. In this example, the relationship information is start information and continuation information. Whether it is a two-system operation or a system-integrated operation is related to the air condition in the room 710 . When execution of one of the circulation operation and the ventilation operation is determined, the damper control unit 213 controls the damper mechanism 20 to either the circulation mode or the release mode corresponding to the determined one operation. do.
Specifically, it is as follows.
In step S19, the determination unit 212 receives either the continuation information or the start information, and determines whether the received information is the start information. When determining unit 212 determines that the start information has been received, the process proceeds to step S20. If the determination unit 212 determines that the start information is not received, that is, if the determination unit 212 determines that the continuation information is received, the process proceeds to step S21.

<Step S20>
In step S<b>20 , the damper control section 213 puts the damper mechanism 20 into the circulation mode by controlling the damper mechanism 20 . The operation of the damper mechanism 20 in circulation mode is as follows. The damper control unit 213 puts the first damper 21 into a state of blocking the supply of air, and puts the second damper 22 into a state of blocking the exhaust. That is, as shown in FIG. 6, the damper control section 213 changes the first damper 21 from the first state ST11 to the second state ST12 to cut off the supply of outside air to the room 710 through the air supply passage 41 . In the second state ST12, the opening 63 appears and the air supply channel 41 and the exhaust channel 42 communicate with each other. The damper control unit 213 changes the second damper 22 from the first state ST21 to the second state ST22 to block the discharge of the exhaust gas from the exhaust passage 42 to the outside of the room. As the air supply channel 41 and the exhaust channel 42 are blocked, the damper control unit 213 stops the operating exhaust fan 32 . The damper control unit 213 keeps the operating air supply fan 31 in operation. Air in the room 710 is circulated by controlling the first damper 21 , the second damper 22 and the exhaust fan 32 by the damper control unit 213 .
That is, as shown in FIG. 6 , the air in the room 710 circulates through the air supply channel 41 , the exhaust channel 42 and the room as the circulation channel 43 .

<Step S21>
In step S21, the damper control unit 213 maintains the ventilation operation according to the continuation information. That is, the damper control unit 213 maintains the release mode of the damper mechanism 20 .

*** Effect of Embodiment 1 ***
When the first system 701 is stopped due to the system-integrated operation, the ventilator 100 performs a circulation operation in which air is circulated in the room 710, so that the temperature unevenness caused by the system-integrated operation can be reduced. In addition, by reducing temperature unevenness, system-intensive operation can be actively utilized. Therefore, in addition to being able to operate the air conditioning system 1 with high efficiency during frequent low-load operation, by combining the existing air conditioner and the existing ventilation device with the ventilation device 100, it has a ventilation volume that satisfies the WELL standard. Can provide an air conditioning system.

In addition, since the ventilator 100, which serves as both a ventilator and a circulator, is installed in the ceiling space, the equipment does not hang from the ceiling of the room, and there is an effect that the occupants do not feel oppressed.

Embodiment 2.
Embodiment 2 switches between ventilation operation and circulation operation depending on the internal state of room 710 . In Embodiment 2, execution of system integration operation is not determined, so integration determination unit 211 is not essential. Assume that the hardware configuration of the control device 200 of the second embodiment is the same as that of the control device 200 of the first embodiment.

FIG. 12 is a flow chart for explaining operations of the ventilation device 100 and the control device 200 in the air conditioning system 1 of Embodiment 2. FIG. The operation of the ventilator 100 and the control device 200 will be described with reference to FIG.

<Step S31>
In step S31, as shown in FIG. 2, both the first system 701 and the second system 702 are in operation.

<Step S32>
The determination unit 212 acquires internal information indicating at least one of the number of people present in the room 710 and the concentration of carbon dioxide in the room 710 as the relational information. The decision unit 212 refers to the internal information and decides which of the circulation operation and the ventilation operation is to be executed. Specifically, it is as follows.
In step S32, the determining unit 212 acquires internal information from another device. The number of people in the room can be obtained from a device such as an entrance/exit management device or a human sensor provided in the room 710 . The concentration of carbon dioxide in room 710 can be obtained from a device such as a sensor that detects the concentration of carbon dioxide. The number of people in the room can be obtained from information such as operating state information of personal computers, location information of smartphones, or location information of wearable devices. In this example, a human sensor will be described as an example. The determination unit 212 has TH=50 as the threshold TH for the number of people in the room 710 . The determining unit 212 acquires information on the number of people in the room 710 from the human sensor 641 shown in FIG. In addition, as shown in FIG. 10, the human sensor 641 is connected to the determination part 212 via communication IF260.

<Step S33>
The determination unit 212 compares the internal information, which is information on the number of people acquired from the human sensor 641, with the threshold TH. If the determination unit 212 determines that the number of people in the room is equal to or less than the threshold TH, the process proceeds to step S34. If the determining unit 212 determines that the number of people in the room is larger than the threshold TH, the process proceeds to step S35.

<Step S34>
In step S34, the damper control section 213 puts the damper mechanism 20 into the circulation mode. The circulating operation in step S34 is the same as in step S20, so the explanation is omitted.

<Step S35>
At step S35, the damper control unit 213 maintains the ventilation operation. Since the circulation operation in step S35 is the same as in step S20, the explanation is omitted.

In other words, when the number of people in the room or the carbon dioxide concentration in the room is higher than the threshold, the ventilation operation is performed, and when the number of people in the room or the carbon dioxide concentration in the room is lower than the threshold, the circulator operation is performed or the ventilation system 100 stops running.

(***Description of the effects of the second embodiment***)
By adjusting the amount of ventilation air according to the number of people in the room or the concentration of carbon dioxide, the load on the air conditioning system 1 and the fan power of the ventilation device can be reduced, resulting in energy savings.

Embodiment 3.
Embodiment 3 will be described with reference to FIG. The hardware configuration of the control device 200 according to the third embodiment is the same as that of the control device 200 according to the first embodiment, so the drawing is omitted.
FIG. 13 is a flow chart explaining the operation of the ventilation device 100 and the control device 200 in the air conditioning system 1 of Embodiment 3. FIG. The operation of the ventilator 100 and the control device 200 will be described with reference to FIG.

Determination unit 212 acquires, as related information, start information that notifies the start of system integration operation, and internal information that indicates at least one of the number of people present in room 710 and the concentration of carbon dioxide in room 710. do. The decision unit 212 decides which of the circulation operation and the ventilation operation is to be executed based on the start information and the internal information. The determination unit 212 determines execution of the ventilation operation when either the number of people included in the internal information or the concentration of carbon dioxide exceeds a threshold.
A specific description will be given below.
FIG. 13 is a flow chart in which steps S32 and S33 of the flow chart of FIG. 12 are incorporated between steps S19 and S20 of the flow chart of FIG. In FIG. 13, steps S32 and S33 are denoted as steps S32a and S33a, and step S20 in FIG. 12 is denoted as step S34a. In Embodiment 3, even if the determination unit 212 receives the start information, the circulation operation is not immediately performed. The determining unit 212 waits for acquisition of the internal information, and executes either the ventilation operation or the circulation operation according to the comparison result between the acquired internal information and the threshold value TH. Steps S32a, S33a, and S34a, which are included in the flow chart of FIG. 11, are the same as those of FIG. 12, so description thereof will be omitted.

*** Effect of Embodiment 3 ***
In the third embodiment, it is determined which of the ventilation operation and the circulation operation is to be performed, instead of immediately performing the circulation operation when system-intensive operation is performed. Therefore, ventilation can be performed according to the state of the air in the room 710 when system-intensive operation is performed.

Although the first damper 21 closes the opening 63 in the damper mechanism 20 described above, the opening 63 may be closed by the second damper 22 .
In this configuration, the second damper 22 is arranged at the position of the first damper 21 in FIG. 3 and the first damper 21 is arranged at the position of the second damper 22 . The first damper 21 is arranged on the first partition plate 61 .

<Supplementary hardware configuration>
The hardware configuration of the control device 200 is supplemented below. In the control device 200 of FIG. 10, the functions of the control device 200 are implemented by software, but the functions of the control device 200 may be implemented by hardware.
FIG. 14 shows a hardware configuration of a modification of the control device 200. As shown in FIG. The electronic circuit 800 of FIG. 14 is a dedicated electronic circuit that realizes the functions of the aggregation determination unit 211, the determination unit 212, the damper control unit 213, the main storage device 220, the auxiliary storage device 230, the input IF 240, the output IF 250, and the communication IF 260. be. Electronic circuit 800 is connected to signal line 801 . Electronic circuit 800 is specifically a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, a logic IC, GA, ASIC, or FPGA. GA is an abbreviation for Gate Array. ASIC is an abbreviation for Application Specific Integrated Circuit. FPGA is an abbreviation for Field-Programmable Gate Array. The functions of the components of the control device 200 may be realized by one electronic circuit, or may be distributed and realized by a plurality of electronic circuits. As another modification, some functions of the components of the control device 200 may be realized by electronic circuits, and the remaining functions may be realized by software.

Each of processor 210 and electronic circuitry 800 is also referred to as processing circuitry. In the control device 200, the functions of the aggregation determination section 211, the determination section 212, and the damper control section 213 may be realized by processing circuitry. Alternatively, the functions of the aggregation determination unit 211, the determination unit 212, the damper control unit 213, the main storage device 220, the auxiliary storage device 230, the input IF 240, the output IF 250, and the communication IF 260 may be realized by processing circuitry.

1 air conditioning system 10 total heat exchanger 20 damper mechanism 21 first damper 22 second damper 31 air supply fan 32 exhaust fan 41 air supply channel 42 exhaust channel 43 circulation channel 51a Inside outside air duct 51b Outside outside air duct 52a Inside exhaust duct 52b Outside exhaust duct 61 First partition plate 62 Second partition plate 63 Opening 70 Housing 81 Inside air supply port 82 Inside exhaust port 91 Outer air supply port 92 Outer exhaust port 100 Ventilation device 200 Control device 201 Control program 210 Processor 211 Aggregation determination unit 212 Determination unit 213 Damper control unit 220 Main storage device 230 Auxiliary storage device 240 Input IF, 250 Output IF, 260 Communication IF, 310,320 points, 601 First air conditioner, 602 Second air conditioner, 610 Indoor unit, 611 Piping, 621,622 Outdoor unit, 630 Ventilator, 641 Human feeling Sensors, 701 first system, 702 second system, 710 room, 711 ceiling, 712 space above the ceiling, 800 electronic circuit, 801 signal line.

Claims (3)

A ventilator comprising an air supply channel for outside air supplied to a room and an exhaust channel for exhaust air discharged from the room,
a total heat exchanger through which the outside air in the air supply channel and the exhaust air in the exhaust channel pass;
A circulation mode in which the supply of the outside air through the air supply passage is cut off, the discharge of the exhaust air through the exhaust passage is cut off, and the air supply passage and the exhaust passage are communicated, and the circulation mode is canceled. a mode in which the outside air is supplied from the air supply channel to the room, the exhaust gas is discharged from the exhaust channel, and communication between the air supply channel and the exhaust channel is cut off. a damper mechanism that switches to a release mode that is
with
The circulation operation in which the air in the room circulates is
Executed in the circulation mode, the air in the room circulates through the exhaust passage, the supply air passage and the room without passing through the total heat exchanger;
The ventilation operation for ventilating the room includes:
Executed in the release mode,
The ventilator further comprises:
a determination unit that acquires relational information related to the air state of the room and determines which of the circulation operation and the ventilation operation is to be performed based on the relational information;
When execution of one of the circulation operation and the ventilation operation is determined, the damper mechanism is controlled to either the circulation mode or the cancellation mode corresponding to the determined one operation. a damper control unit;
a controller having
The determining unit, as the relationship information,
Among a plurality of systems including a plurality of unit systems having a plurality of indoor units installed in the room and an outdoor unit for air-conditioning the plurality of indoor units, at least one unit system is stopped and the remaining unit systems are turned off. A ventilator that acquires start information for notifying the start of system-intensive operation to operate, and that determines execution of the circulation operation when the start information is acquired. A ventilator comprising an air supply channel for outside air supplied to a room and an exhaust channel for exhaust air discharged from the room,
a total heat exchanger through which the outside air in the air supply channel and the exhaust air in the exhaust channel pass;
A circulation mode in which the supply of the outside air through the air supply passage is cut off, the discharge of the exhaust air through the exhaust passage is cut off, and the air supply passage and the exhaust passage are communicated, and the circulation mode is canceled. a mode in which the outside air is supplied from the air supply channel to the room, the exhaust gas is discharged from the exhaust channel, and communication between the air supply channel and the exhaust channel is cut off. a damper mechanism that switches to a release mode that is
with
The circulation operation in which the air in the room circulates is
Executed in the circulation mode, the air in the room circulates through the exhaust passage, the supply air passage and the room without passing through the total heat exchanger;
The ventilation operation for ventilating the room includes:
Executed in the release mode,
The ventilator further comprises:
a determination unit that acquires relational information related to the air state of the room and determines which of the circulation operation and the ventilation operation is to be performed based on the relational information;
When execution of one of the circulation operation and the ventilation operation is determined, the damper mechanism is controlled to either the circulation mode or the cancellation mode corresponding to the determined one operation. a damper control unit;
a controller having
The determining unit, as the relationship information,
Among a plurality of systems including a plurality of unit systems having a plurality of indoor units installed in the room and an outdoor unit for air-conditioning the plurality of indoor units, at least one unit system is stopped and the remaining unit systems are turned off. Acquiring start information notifying the start of system integration operation to be activated, and internal information indicating at least one of the number of people present in the room and the concentration of carbon dioxide in the room, and acquiring the start information and the and internal information to determine whether to perform the circulation operation or the ventilation operation. The decision unit
3. The ventilation system according to claim 2 , wherein execution of the ventilation operation is determined when either the number of people included in the internal information or the concentration of carbon dioxide exceeds a threshold.

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