JP7128774B2 - Ventilator and ventilation system - Google Patents

Description

TECHNICAL FIELD The present invention relates to a ventilation system of a type that is installed corresponding to a living room of a building, adjusts the temperature and humidity of the air from the outside, and guides it into the living room.

Conventionally, when ventilating living rooms in buildings such as office buildings, computer buildings, convenience stores, etc. (rooms where people stay for a certain period of time or enter and leave frequently), the total heat exchanger is used to exhaust air from the living room. Ventilation devices are known that are configured to adjust the temperature and humidity of outside air such as outside air supplied to a living room using part of the thermal energy of the air that is discarded to the outside (for example, See Patent Document 1, etc.). According to such a ventilator, the temperature and humidity of the air supplied from the outside to the living room are adjusted to the outside of the living room before being introduced into the air conditioner that circulates the air in the living room to adjust the air temperature and the like. Since the temperature and humidity can be made closer to the temperature and humidity of the discharged air, it is possible to reduce the air conditioning load of the air conditioner.

Japanese Patent No. 3152543

By the way, in the ventilation system described above, the outside air introduced into the living room from this ventilation system is provided with heat energy partially recovered by the total heat exchanger from the exhaust air that was the temperature-controlled room air. However, depending on the season and weather, if the outside air before the adjustment contains a large amount of moisture, it may be more uncomfortable than the conditioned air inside the room. may become

The present invention has been made in view of the above circumstances, and its object is to make the outside air introduced into the circulation air conditioning system in the living room more comfortable without using a refrigeration cycle. It is to provide a ventilator or the like.

Each means suitable for solving the above object will be described below by itemizing. It should be noted that actions and effects peculiar to the corresponding means will be added as necessary.

Means 1. A ventilation device provided corresponding to a living room in a building comprising a living room, an outer wall and a roof,
The outer wall part or the roof part has a double skin that is a double structure of a wall or ceiling that heats the internal air at least by solar radiation,
an air supply path having a common air supply path into which air flows from the outside, and configured such that the supply destination of the air passing through the common air supply path branches into the living room and the double skin;
a desiccant material installed in the common air supply path and capable of dehumidifying air passing through the common air supply path by adsorbing moisture;
air supply target switching means for switching the supply destination of the air passing through the common air supply path to the living room or the double skin;
an exhaust path having a common exhaust path through which air to be discharged to the outside passes, and configured so that the air inflow sources for the common exhaust path are the interior of the living room and the double skin;
Exhaust target switching means for switching an inflow source of air to the common exhaust passage to the living room or the double skin;
a total heat exchanger having a total heat exchange element, an air supply fan, and an exhaust fan that can perform total heat exchange between the air passing through the common air supply path and the air passing through the common exhaust path;
An apparatus main body comprising a cooling means installed between the total heat exchanger and the desiccant material in the common air supply path and capable of cooling air passing through the common air supply path by flowing a predetermined refrigerant therein. has a part
The desiccant material is arranged in a fixed state,
The device main body is operable in a predetermined normal mode or a predetermined reproduction mode,
In the normal mode, the supply destination of the air passing through the common air supply path is set to the living room by the air supply target switching means, and the air inflow source to the common exhaust path is set to the above by the exhaust target switching means. By being in a living room, the air passing through the total heat exchanger and the desiccant material is supplied into the living room through the air supply path,
In the regeneration mode, the supply destination of the air passing through the common air supply passage is set to the inside of the double skin by the air supply target switching means, and the air inflow source to the common exhaust passage is set by the exhaust target switching means. By being inside the double skin, the total heat exchanger heats the air passing through the common air supply passage using the air that flows out from inside the double skin and passes through the common exhaust passage, and the heated air passes through the common air exhaust passage. A ventilator, wherein the desiccant material is heated and regenerated by the heated air.

According to the above means 1, the device main unit can operate in the normal mode or the reproduction mode.

In the normal mode, the supply destination of air (air from the outside) that has passed through the common air supply path and the inflow source of air to the common exhaust path (the inflow source of discharged air) are each the living room. Air from the outside is supplied into the living room through the total heat exchanger and the desiccant material. The total heat exchange between the outside air and the air discharged from the room is performed by the total heat exchanger, and the temperature of the air supplied to the room is the same as the temperature of the air discharged outside the room. is closer to the temperature of Furthermore, the desiccant material absorbs the moisture contained in the air from the outside, thereby reducing the humidity of the air supplied into the living room.

By adjusting the temperature and reducing the humidity of the air supplied to the living room in this way, it is possible to introduce and supply outside air into the living room during seasons such as summer when the temperature and humidity of the outside air tend to be relatively high. It is possible to make the air supplied to the room more comfortable for the personnel in the living room. In addition, it is possible to reduce the air conditioning load (dehumidification load) of the air conditioner that circulates and adjusts the temperature of the air in the living room, and as a result, it has good performance in terms of energy saving performance and environmental performance (CO ₂ emissions, etc.). can be obtained. In addition, instead of dehumidifying the air by compressing the air, desiccant material that absorbs moisture is used to dehumidify the air. Therefore, the cost of dehumidification can be reduced and the size of the device can be reduced.

On the other hand, since there is a limit to the amount of water that can be adsorbed by the desiccant material, in order to maintain the dehumidification function of the desiccant material, the desiccant material must be regenerated, that is, the desiccant material must be heated to evaporate the adsorbed moisture. Is required. In this regard, according to the above means 1, in the regeneration mode, the supply destination of the air (air from the outside) passing through the common air supply passage and the inflow source of the air to the common exhaust passage (the inflow source of the discharged air) ) are inside the double skins, and the total heat exchanger heats the air passing through the common air supply passage using the relatively high temperature air that flows out from inside the double skins, and the desiccant material is heated by this heated air. heated and played.

In this way, in the regeneration mode, since the desiccant material is regenerated by effectively utilizing the thermal energy of the air in the double skin, there is no need to provide a separate heat source device to generate the thermal energy for regeneration. The cost can be reduced and the energy saving performance can be further improved.

Also, in the regeneration mode, the air in the double skins is not directly supplied to the desiccant material, but the air in the double skins is used by the total heat exchanger to heat the air passing through the common air supply path. Air is supplied to the desiccant material. Therefore, it is possible to eliminate the need for a flow path including a blower for directly supplying the air in the double skin to the desiccant material, which is more advantageous in terms of cost, miniaturization, and the like.

Furthermore, the air dehumidified by the desiccant material in the normal mode and the air for heating and regenerating the desiccant material in the regeneration mode are each supplied to the desiccant material through the same flow path (common air supply path). Here, when a flow path for air dehumidified by the desiccant material (the former flow path) and a flow path for heating and regenerating the desiccant material (the latter flow path) are provided separately, In the desiccant material, it is necessary to alternately change (replace) the portion arranged corresponding to the former channel and the portion arranged corresponding to the latter channel. Therefore, the desiccant material must be configured to be movable (for example, rotatable). In this regard, according to the above means 1, the air to be dehumidified by the desiccant material and the air for heating and regenerating the desiccant material are respectively supplied to the desiccant material through the same passage (common air supply passage). Therefore, the desiccant material need not be movable, and the desiccant material can be arranged in a fixed state. Therefore, compared with the case where the desiccant material is movable, cost reduction and miniaturization can be further achieved.

In addition, the flow of air (regeneration air) supplied to the desiccant material in the regeneration mode and the flow of air (dehumidified air) supplied to the desiccant material during dehumidification (normal mode) should be the same. can be done. Therefore, the heated air can be more reliably applied to the moisture-adsorbed portion of the desiccant material, and the moisture can be effectively evaporated. As a result, the desiccant material can be efficiently regenerated.

Also, in the regeneration mode, the air is cooled by the vaporization heat of water vapor generated when the desiccant material is heated (during regeneration), and the cooled air is supplied into the double skin. Therefore, the air in the double skin can be replaced by using the air from the outside whose dry-bulb temperature is relatively low due to the heat of vaporization. As a result, it is possible to suppress an excessive temperature rise in the double skin, which leads to various problems associated with an excessive temperature rise (for example, due to an increase in heat transfer through the inner partition of the air temperature in the double structure, which is an air layer). It is possible to more reliably suppress the occurrence of heat load increase in the living room, structural deterioration due to heating of the double structure, etc.

Furthermore, according to the above means 1, the air passing between the total heat exchanger and the desiccant material in the common air supply path can be cooled by the cooling means. Therefore, when switching from the regeneration mode to the normal mode, even if the desiccant material is in a state of heat due to the regeneration up to that point, the air is cooled by the cooling means so that the high temperature enters the living room. It is possible to more reliably prevent the air from being supplied. As a result, even immediately after switching from the regeneration mode to the normal mode, it is possible to ensure that the air introduced and supplied from the outside into the living room is comfortable for the people in the living room. In addition, even in the normal mode, the temperature of the circulating air in the living room is controlled by cooling the heat of the outside air due to the heat of adsorption generated when dehumidifying the air introduced from the outside with the desiccant material. It is possible to more reliably reduce the heat load of the air conditioner.

Means 2. The ventilator according to means 1, wherein at least condensed water in the air discharged from a temperature controller capable of adjusting air temperature is used as the refrigerant.

According to the above means 2, by using the condensed water in the air, which is discharged from temperature controllers such as air conditioners and refrigerators and freezers and discarded as waste water, as a refrigerant, the cooling of the air by the cooling means uses extra electric energy. can be done without This air-condensed drain water is cooled to a temperature lower than that of the air that comes out after being temperature-controlled by the temperature controller on the surface of the dehumidification coil, and has sufficient potential as cold energy, but is drained as free water. It was just existence. Therefore, it is possible to effectively utilize the cold energy of the condensed drain water, which is usually simply discharged, and to obtain better performance in terms of energy saving performance and environmental performance.

Means 3. The device main body is
a first blower fan provided corresponding to a first communication portion that communicates from the inside of the double skin to the living room, and for sending the air inside the double skin into the living room;
Means 1 characterized by comprising: a second blower fan provided corresponding to a second communicating portion that communicates from the living room to the inside of the double skin and for sending air in the living room to the inside of the double skin. 3. The ventilator according to any one of 2.

According to the means 3, for example, in winter, air can be exchanged between the inside of the double skin and the living room by operating the first blower fan and the second blower fan. As a result, the heat of the air in the double skin can be used to heat the living room, and the cost and air conditioning load related to heating in the air conditioner for air circulation in the living room can be reduced. In addition, in the summertime, it is possible to prevent the high-temperature air in the double skin from moving into the living room by stopping both blower fans.

Means 4. determination means for determining whether or not the apparatus main body can operate in the reproduction mode;
An operation mode switching capable of switching the operation mode of the apparatus main body from the normal mode to the reproduction mode when the determination means determines that the apparatus main body can operate in the reproduction mode. means and
The determination means includes time information acquisition means for acquiring information on time, concentration information acquisition means for acquiring information on carbon dioxide concentration in the living room, and information on the presence or absence of people in the living room. 4. Judgment as to whether or not the operation in the reproduction mode is possible based on at least two pieces of information acquired from at least two of the person presence/absence information acquisition means. ventilation system.

According to the means 4, it is possible to automatically switch the operation mode of the main body of the device from the normal mode to the reproduction mode based on the determination result by the determination means, thereby improving the convenience.

In addition, according to the above means 4, the determination means determines whether or not the regeneration mode is possible based on at least two pieces of information among the information on the time, the information on the carbon dioxide concentration in the living room, and the information on the presence or absence of people in the living room. Determine whether the operation is possible. Therefore, it is possible to more accurately grasp when the regeneration mode can be operated, that is, when there is no problem even if ventilation in the living room is stopped in the normal mode, and to perform the regeneration mode operation at a more appropriate timing. can be done.

The time information acquisition means can be configured by an IC or the like for realizing a clock function, the concentration information acquisition means can be configured by a CO ₂ sensor, for example, and the presence/absence information acquisition means can be configured by, for example, Thermal sensors that detect the heat emitted by the human body through clothes in a living room by detecting infrared rays, ultrasonic sensors that detect the movement of a person at a certain point in the living room by using ultrasonic waves, etc. It can be configured with a human sensor such as a human detection device that detects the presence or absence of a person by grasping the usage status of WiFi radio waves in the room used by a mobile terminal carried by a person.

Means 5. A ventilation system comprising a plurality of the device main bodies according to any one of the above means 1 to 4,
It has a drain tank for storing at least air-moisture condensed drain water discharged from a temperature controller capable of adjusting air temperature, and the air-moisture condensed drain water stored in the drain tank is used as the refrigerant. configured,
A ventilation system, comprising cooling timing control means for controlling said cooling means so that the number of said device main bodies for which air is simultaneously cooled by said cooling means is less than the total number of said device main bodies.

According to the above means 5, similarly to the above means 2, since the air is cooled by the cooling means using the condensed drain water as the refrigerant, the cooling energy of the drain water can be effectively used. , better performance can be obtained in terms of energy saving performance and environmental performance.

Further, according to the above means 5, the cooling means is controlled by the cooling timing control means so that the number of the device main bodies for which air is cooled by the cooling means at the same time is less than the total number of the device main bodies. For example, the cooling means is controlled so that the cooling of the air is performed in order (by rotation) in each device main body. Therefore, it is possible to more reliably prevent insufficient cooling of the air by the cooling means due to shortage of drain water.

1 is a schematic diagram showing a schematic configuration of an office building, a ventilation system, and the like in a first embodiment; FIG. 1 is a schematic diagram showing a schematic configuration of an apparatus main body and the like in the first embodiment; FIG. FIG. 4 is a schematic diagram for explaining air flow and the like in a normal mode in the first embodiment; FIG. 4 is a schematic diagram for explaining air flow and the like in a regeneration mode in the first embodiment; FIG. 10 is a schematic diagram showing a schematic configuration of a computer building and the like in the second embodiment; FIG. 11 is a schematic diagram showing a schematic configuration of a store building, an apparatus main body, and the like in the third embodiment; FIG. 11 is a schematic diagram for explaining air flow and the like in a normal mode in the third embodiment; FIG. 11 is a schematic diagram for explaining air flow and the like in a regeneration mode in the third embodiment;

Embodiments will be described below with reference to the drawings.
[First embodiment]
As shown in FIGS. 1 and 2, the ventilation system 1 is installed in a living room 102 provided in an office building 101 as a building. , odor, dust, etc., are introduced into the outside air from which dust has been removed, and instead of that, a part of the indoor air containing the above substances is exhausted. First, the office building 101 in which the ventilation system 1 is installed will be described. In FIG. 1 and the like, the office building 101 and the ventilation device 3 described later are shown separately for convenience of explanation. A device 3 is installed. 2, for convenience of illustration, the office building 101 and one living room 102 of the office building 101 are shown separately.

The office building 101 is a relatively high-rise building having a plurality of living rooms 102 used for offices, etc., and has an outer wall and a roof. The outer wall of the office building 101 has a double structure of windows and walls for the purpose of reducing the cross-flow load of the building by the air layer inside the wall and reducing the solar radiation load. It is composed of a double skin 103 that is The double skin 103 is provided over each floor of the office building 101 . In addition, the double skin 103 is provided at a position adjacent to the living room 102 of each floor, and the inner space of the double skin 103 and the inner space of the living room 102 are separated by the wall portion 104 . The double skin 103 has a structure composed of, for example, an outdoor glass (outer glass), an indoor glass (inner glass, which corresponds to the wall portion 104), and an intermediate layer (internal space). An opaque plate material may be used instead of glass.

Furthermore, in each living room 102, a CO ₂ sensor 105 as concentration information acquisition means and a heat sensor 106 as human presence information acquisition means are provided. The CO ₂ sensor 105 is for obtaining information about the carbon dioxide concentration in the living room 102, and the heat sensor 106 detects the heat emitted by the human body in the living room 102 through clothes by detecting infrared rays. This is for acquiring information about the presence or absence of people in the living room 102 . Information acquired by the CO ₂ sensor 105 and the heat sensor 106 is output to the control device 5, which will be described later. Although FIG. 2 shows a state in which one CO ₂ sensor 105 and one heat sensor 106 are installed in the living room 102, the number and installation location of the CO ₂ sensor 105 and heat sensor 106 can be changed as appropriate. is.

Further, outside the office building 101, an outdoor unit (not shown) of an air conditioner 107 is provided for circulating indoor air to adjust the temperature and humidity of the air in the living room 102. FIG. In this embodiment, the air conditioner 107 (indoor unit) corresponds to the temperature controller. When the air conditioner 107 circulates the air in the living room 102 (for example, when the air conditioner 107 cools the inside of the living room 102), moisture in the air condenses on the cooling coil surface of the air conditioner 107 (indoor unit). As a result, airborne moisture condensed drain water can be discharged.

Next, the ventilation system 1 will be explained. A ventilation system 1 includes a drain water recovery supply device 2 and a ventilation device 3 .

The drain water recovery/supply device 2 recovers and stores the air-moisture condensed drain water discharged from the air conditioner 107, and then supplies the stored air-moisture condensed drain water to the ventilation device 3 (especially the cooling coil 43 described later). ). The drain water recovery supply device 2 includes a drain water recovery path 21 , a drain tank 22 and a drain water supply path 23 .

The drain water recovery path 21 is a channel for condensed air moisture condensed drain water that connects the (outdoor unit of) the air conditioner 107 and the drain tank 22 . ) is sent to the drain tank 22 . Condensed air-moisture condensed drain water recovered through the drain water recovery path 21 is stored in the drain tank 22 .

The drain water supply path 23 is a flow path for condensed water in the air that connects the drain tank 22 and a plurality of device main body portions 4 (especially cooling coils 43) described later. A feed pump 24 is installed in the drain water supply path 23, and by the operation of the feed pump 24, air-moisture condensed drain water stored in the drain tank 22 is sent through the drain water supply path 23 to each device main body. It is adapted to be sent to the section 4 (particularly the cooling coil 43). The drain water sent to the device main body 4 passes through the inside of the cooling coil 43 and is then discharged through a predetermined drain water discharge path 26 .

In addition, a supply target switching valve 25 is installed in each of the drain water supply paths 23 that are individually connected to the device main body 4 . The supply target switching valve 25 is used to switch the apparatus main body 4 (cooling coil 43 ) to which the condensed drain water from the drain tank 22 is supplied.

The ventilator 3 includes a device main body 4 and a control device 5 that controls the operation of the device main body 4 and the like. The device main unit 4 and the control device 5 may be one-to-one, or may be many-to-one.

One or a plurality of apparatus main bodies 4 are provided for each living room 102, and include an air supply path 41, a total heat exchanger 42, a cooling coil 43 as cooling means, a desiccant material 44, and a first air supply target switching means as air supply target switching means. It has an opening/closing valve 45a and a second opening/closing valve 45b, an exhaust passage 46, and a third opening/closing valve 47a and a fourth opening/closing valve 47b as exhaust target switching means. Although FIG. 2 shows the configuration of one device main body 4, the other device main body 4 has the same configuration.

The air supply path 41 includes a common air supply path 413 into which air from the outside flows, and a first supply destination air supply path 411 and a second supply destination air supply path 411 and a second supply destination air supply path 411 that are branched and formed to be connected to the most downstream part of the common air supply path 413, respectively. and an airway 412 . The air outlet of the first supply destination air supply passage 411 is set inside the double skin 103 , while the air outlet of the second supply destination air supply passage 412 is set inside the living room 102 .

The total heat exchanger 42 has, for example, a total heat exchange element that is a static total heat exchanger, an air supply fan that draws in air from the outside and supplies it, and an exhaust fan that exhausts the exhaust air to the outside. , a channel through which air in the common air supply channel 413 passes and a channel through which air in a common exhaust channel 463 described later passes. These channels are partitioned by partitions (not shown) made of, for example, a heat-conducting and moisture-permeable material. The total heat exchanger 42 performs total heat exchange between the air passing through the common air supply path 413 and the air passing through the common exhaust path 463 .

Regarding the supply air taken into the building from the total heat exchange element, in the common air supply path 413, the operation of the air supply fan of the total heat exchanger 42 transports outside air into the common air supply path 413 from the outside ( ), this air is blown out into the living room 102 and the double skin 103 through the supply destination air supply passages 411 and 412 . In other words, the supply destination of the air passing through the common air supply path 413 is configured to branch into the double skin 103 and the living room 102 .

The cooling coil 43 is installed between the total heat exchanger 42 and the desiccant material 44 in the common air supply passage 413, and cools the air passing through the common air supply passage 413 by flowing a predetermined refrigerant therein. In this embodiment, condensed water in the air stored in the drain tank 22 is used as the refrigerant.

The desiccant material 44 has an air-permeable element filled or coated with a desiccant (drying agent) for absorbing moisture. The desiccant material 44 is arranged in the common air supply passage 413 downstream of the cooling coil 43 and dehumidifies the air passing through the common air supply passage 413 by adsorbing moisture with the desiccant. Since the moisture is removed by adsorption, the heat of adsorption is generated as a change on the iso-humid-bulb temperature line. In addition, the desiccant material 44 is arranged in a fixed state, and does not have a mechanism for movement (for example, a rotating mechanism).

Furthermore, the desiccant material 44 is configured to release the moisture adsorbed by the desiccant to the outside when the desiccant material 44 itself is heated. In other words, the desiccant material 44 can be returned (that is, regenerated) to a state in which it can sufficiently adsorb moisture by being heated.

The first opening/closing valve 45a and the second opening/closing valve 45b are for switching the supply destination of the air passing through the common air supply path 413 to the living room 102 or the double skin 103 . The first opening/closing valve 45 a is provided in the first supply destination air supply passage 411 and switches the opening/closing state of the first supply destination air supply passage 411 . The second opening/closing valve 45 b is provided in the second supply destination air supply passage 412 and switches the opening/closing state of the second supply destination air supply passage 412 .

Both the opening/closing valves 45a and 45b are configured to be controlled in operation by the control device 5 (in particular, an operation mode switching section 53, which will be described later). When the supply destination of the air passing through the common air supply path 413 is the living room 102, the first supply destination air supply path 411 is closed by the control device 5, while the second supply destination air supply path 412 is closed. , are controlled to open. On the other hand, when the supply destination of the air passing through the common air supply passage 413 is the inside of the double skin 103, the first supply destination air supply passage 411 is opened by the control device 5, while the second supply destination air supply passage 411 is opened. Both open/close valves 45a and 45b are controlled so that the air passage 412 is closed.

The exhaust path 46 includes a common exhaust path 463 through which air to be discharged to the outside passes, and a first inflow source exhaust path 461 and a second inflow source exhaust path 462 that are connected to the most upstream portion of the common exhaust path 463, respectively. there is An air intake port of the first inflow source exhaust passage 461 is set inside the double skin 103 , while an air intake port of the second inflow source exhaust passage 462 is set inside the living room 102 . Further, as described above, due to the operation of the exhaust fan provided in the total heat exchanger, air is sucked (inflows) from the room 102 and the double skin 103 into the inflow source exhaust passages 461 and 462, and this air is It is designed to be discharged to the outside through the common exhaust path 463 . That is, it is configured such that the air inflow sources for the common exhaust path 463 are both the interior of the double skin 103 and the interior of the living room 102 .

The third opening/closing valve 47a and the fourth opening/closing valve 47b are for switching the source of the air flowing into the common exhaust path 463 to the living room 102 or the double skin 103 . The third opening/closing valve 47 a is provided in the first inflow source exhaust passage 461 and switches the opening/closing state of the first inflow source exhaust passage 461 . The fourth open/close valve 47 b is provided in the second inflow source exhaust passage 462 and switches the open/close state of the second inflow source exhaust passage 462 .

Both the opening/closing valves 47a and 47b are configured to be operated and controlled by the control device 5 (especially the operation mode switching section 53 described later) in the same manner as the first opening/closing valve 45a and the second opening/closing valve 45b. there is When the inflow source of air to the common exhaust path 463 is the living room 102, the control device 5 closes the first inflow source exhaust path 461 and opens the second inflow source exhaust path 462. Both opening and closing valves 47a and 47b are controlled in this manner. On the other hand, when the inflow source of the air to the common exhaust passage 463 is the inside of the double skin 103, the first supply destination air supply passage 411 is opened by the control device 5, while the second supply destination air supply passage 412 is opened. Both the opening/closing valves 47a and 47b are controlled so that the .

In addition, the device main body 4 has a first blower fan 48a and a second blower fan 48b. The first blower fan 48 a is provided corresponding to the first communication portion 104 a that communicates from inside the double skin 103 to inside the room 102 . By operating the first blower fan 48 a , it is possible to send the air inside the double skin 103 into the room 102 . On the other hand, the second blower fan 48b is provided corresponding to the second communicating portion 104b that communicates from inside the living room 102 to inside the double skin 103 . By operating the second blower fan 48b, it becomes possible to send the air in the living room 102 into the double skin 103. As shown in FIG.

Further, the device main body 4 is operable in a normal mode or a reproduction mode. The normal mode is a mode for sending comfortable outside air into the living room 102 , and the regeneration mode is a mode for regenerating the desiccant material 44 .

In the normal mode, as shown in FIG. 3, the first and second opening/closing valves 45a and 45b supply the air through the common air supply path 413 to the living room 102, and the third and fourth opening/closing valves 47a and 47b allow the air to flow into the common exhaust path 463 from inside the living room 102 . As a result, the air that has passed through the total heat exchanger 42 and the desiccant material 44 is supplied into the living room 102 through the air supply path 41, and part of the air in the living room 102 is discharged to the outside through the exhaust path 46. It will be discharged.

On the other hand, in the regeneration mode, as shown in FIG. 4, the supply destination of the air passing through the common air supply passage 413 is set inside the double skin 103 by the first and second opening/closing valves 45a and 45b. The four on-off valves 47 a and 47 b allow the air to flow into the common exhaust passage 463 from within the double skin 103 . As a result, the air that has passed through the total heat exchanger 42 and the desiccant material 44 is supplied into the double skin 103 through the air supply path 41, and the air in the double skin 103 is discharged to the outside through the exhaust path 46. It will be in a state where In this state, the total heat exchanger 42 heats the air passing through the common air supply passage 413 by utilizing the air flowing out of the double skin 103 and passing through the common exhaust passage 463, and the heated air It becomes possible to regenerate the desiccant material 44 by heating it.

Switching of the operation mode in the device main body 4 is performed by the control device 5 . Therefore, next, the control device 5 will be described.

The control device 5 is for controlling the operation of each device main unit 4, and is composed of a computer system or the like including, for example, a CPU, memory, input/output terminals, and the like. The control device 5 includes a time information acquisition section 51 as time information acquisition means, a determination section 52 as determination means, an operation mode switching section 53 as operation mode switching means, and a cooling timing control section 54 as cooling timing control means. (See FIGS. 1 and 2). In this embodiment, the time information acquisition unit 51, the determination unit 52, and the operation mode switching unit 53 are commonly used in controlling the operation of each apparatus main unit 4. It may be provided for each

The time information acquisition unit 51 functions as a clock for ascertaining the current time and as a switch according to the match between the scheduled set time and the current time. It is composed of an IC for implementing the clock function.

The determination unit 52 obtains the information about the time obtained from the time information obtaining unit 51, the information about the carbon dioxide concentration in the living room 102 obtained from the CO ₂ sensor 105, and the information about the presence or absence of people in the living room 102 obtained from the heat sensor 106. Based on this, it is determined whether or not each device main unit 4 can operate in the reproduction mode. In this embodiment, based on the acquired information, the determining unit 52 determines that the carbon dioxide concentration in the living room 102 is lower than a predetermined value and that there is no person in the living room 102 at the time from nighttime to early morning. is assumed, it is determined that the operation in the reproduction mode is possible. Of course, this determination method is an example and can be changed as appropriate. Further, for example, the device main unit 4 to be determined whether or not the operation in the reproduction mode is possible may be set differently for each day of the week.

Note that the determination unit 52 determines whether operation in the reproduction mode is possible based on at least two pieces of information acquired from at least two of the time information acquisition unit 51, the CO ₂ sensor 105, and the heat sensor 106. It may be something to do. In place of or in addition to the heat sensor 106, an ultrasonic sensor that detects the movement of a person at a certain point in the living room 102 by using ultrasonic waves or the like as a means for obtaining information on the presence or absence of people, Other types of human detection sensors such as a human detection device that detects the presence or absence of people in the living room 102 by grasping the usage status of WiFi radio waves in the living room 102 used by portable terminals may be used.

The operation mode switching section 53 is for switching the operation mode in the device body section 4 . When the determination unit 52 determines that the operation in the reproduction mode is possible, the operation mode switching unit 53 switches the operation mode of the apparatus body unit 4 related to this determination from the normal mode to the reproduction mode. Further, when the operation mode switching unit 53 recognizes that the current time has reached the playback mode end time, which will be described later, based on the information about the time acquired from the time information acquisition unit 51, the operation mode of the device main unit 4 is changed to Switch from playback mode to normal mode.

The cooling timing control unit 54 is for setting the regeneration mode end time indicating the switching time from the regeneration mode to the normal mode, and for selectively supplying drain water to the device main unit 4 (cooling coil 43). be. The cooling time control unit 54 sets the reproduction mode end time for each device main unit 4 whose operation mode has been switched from the normal mode to the reproduction mode. In this embodiment, the cooling timing control unit 54 basically uses the switching time from the normal mode to the regeneration mode as a reference time, and terminates the regeneration mode at the time when a predetermined regeneration operation time has elapsed from this reference time. Set to time.

However, the cooling timing control unit 54 controls each apparatus main unit 4 so that the number of apparatus main units 4 whose predetermined cooling execution periods temporally overlap is less than the preset simultaneous operation number. Sets the playback mode end time. The cooling execution period starts when the regeneration mode ends and ends when a predetermined time period elapses after the regeneration mode ends, and is a period during which air is cooled by the cooling coil 43. be. Also, the number of simultaneous operations is set to be less than the total number of device main units 4 that the ventilation system 1 has, and is appropriately set according to the amount of drain water that can be stored in the drain tank 22 .

In this embodiment, for example, while the number of simultaneous operations is set to 3, if the basic method of setting the regeneration mode end time described above is used, the cooling execution periods overlap in terms of time. When the number of units 4 is four or more, the cooling timing control unit 54 sets the reproduction mode end time of each device main unit 4 so that the number of such device main units 4 is three or less. adjusted. In the present embodiment, the cooling timing control unit 54 controls the air cooling by the cooling coil 43 only in one device main body 4, or controls the cooling coils in a plurality of device main bodies 4 that are less than the number of simultaneous operations. The regeneration mode end time is set so that the cooling of the air by 43 is performed at the same time. The cooling timing control unit 54 is configured so that, for example, the cooling execution periods of the respective apparatus main units 4 are different, that is, the cooling of the air by the cooling coils 43 is performed in a predetermined rotation (according to the order). , the playback mode end time in each device main unit 4 may be set.

Further, when the set reproduction mode end time comes, the cooling timing control unit 54 controls the operation of the cooling coil 43 so that the cooling coil 43 of the apparatus main body 4 performs the cooling operation related to the reproduction mode end time. . More specifically, the cooling timing control unit 54 controls the supply target switching valve 25 so that the air-condensed drain water is supplied to the cooling coil 43 of the device main unit 4 according to the regeneration mode end time. The operation of the cooling coil 43 is controlled by opening the drain water supply path 23 associated with the cooling coil 43 . In the present embodiment, since the reproduction mode end time is set as described above, cooling of the air by the cooling coils 43 is performed separately for each of one or a plurality of device main units 4 . Further, by setting the reproduction mode end time as described above, the number of apparatus main bodies 4 for which the air is cooled by the cooling coils 43 at the same time becomes smaller than the total number of the apparatus main bodies 4. , the operation of the cooling coil 43 is controlled.

When the cooling execution period elapses after the supply of drain water to the cooling coil 43 is started, the cooling timing control unit 54 controls the supply object switching valve 25 to cause the condensed water in the air to be drained to the cooling coil 43. supply of

As described in detail above, according to the present embodiment, in the normal mode, the supply destination of air (air from the outside) that has passed through the common air supply passage 413 and the inflow source (discharge of air) to the common exhaust passage 463 The inflow source of the air to be supplied to the living room 102 is assumed to be the inside of the living room 102 . Air from the outside is supplied into the living room 102 through the total heat exchanger 42 and the desiccant material 44 . The total heat exchanger 42 performs total heat exchange between the air from the outside and the air discharged from the living room 102 to the outside, so that the temperature of the outside air supplied into the living room 102 changes to the outside of the living room 102. and the temperature of the exiting air. Furthermore, the desiccant material 44 absorbs the moisture contained in the air from the outside, thereby reducing the humidity of the air supplied into the living room 102 .

By adjusting the temperature and reducing the humidity of the air supplied into the living room 102 in this way, the air can be supplied into the living room 102 in a season such as summer when the temperature and humidity of the outside air tend to be relatively high. The air can be made more comfortable for the personnel in the living room 102 . In addition, the air conditioning load on the air conditioner 107 that air-conditions the living room 102 can be reduced, and good performance in terms of energy saving performance and environmental performance (CO ₂ emissions, etc.) can be obtained. Furthermore, since dehumidification is performed using the desiccant material 44 that adsorbs moisture instead of a dehumidifier that dehumidifies the air by a compression operation, even if the dry bulb temperature rises slightly due to the heat of adsorption, the subsequent The latent heat load process of dehumidification in the cooling coil of the air conditioner 107 that processes the air conditioning load, where the temperature of the refrigerant is close to the temperature of the air, can be replaced with the cooling process of the sensible heat load in which a large temperature difference can be obtained in the logarithmic mean temperature difference. As a result, the number of rows of cooling coils of the air conditioner 107 for circulating temperature control can be reduced, so that the cost for dehumidification can be reduced and the size of the device can be reduced.

On the other hand, since there is a limit to the amount of water that can be adsorbed by the desiccant material 44, in order to maintain the dehumidifying function of the desiccant material 44, the desiccant material 44 must be regenerated, that is, the desiccant material 44 must be heated to absorb the moisture. is required to evaporate. In this regard, in the present embodiment, in the regeneration mode, the supply destination of air (air from the outside) that has passed through the common air supply path 413 and the inflow source of air to the common exhaust path 463 (the inflow source of discharged air) ) are in the double skin 103 respectively. The air that has flowed out of the double skin 103 and has reached a relatively high temperature as a result of continuous application of solar heat to the air layer in the double structure is heat-exchanged by the total heat exchanger 42 and utilized. The air passing through the common air supply passage 413 is heated, and the desiccant material 44 is heated by the heated air and continues to be regenerated.

In this way, in the regeneration mode, since the desiccant material 44 is regenerated by effectively utilizing the thermal energy of the air in the double skin 103, there is no need to separately provide a heat source device that generates thermal energy for regeneration. The regeneration heat is derived from solar radiation, and can reduce the cost of regeneration and further improve energy saving performance.

In the regeneration mode, the air in the double skin 103 is not directly supplied to the desiccant material 44, but the air passing through the common air supply passage 413 is heated by the total heat exchanger 42 using the air in the double skin 103. and this heated air is supplied to the desiccant material 44 . Therefore, it is possible to eliminate the need for a flow path for directly supplying the air in the double skin 103 to the desiccant material 44, which is more advantageous in terms of cost, miniaturization, and the like.

Furthermore, the air dehumidified by the desiccant material 44 in the normal mode and the air for heating and regenerating the desiccant material 44 in the regeneration mode pass through the same flow path (common air supply path 413) to the desiccant material 44. supplied. Here, when the flow path for air dehumidified by the desiccant material 44 (the former flow path) and the flow path for the air for heating and regenerating the desiccant material 44 (the latter flow path) are provided separately Therefore, in the desiccant material 44, it is necessary to alternately change (replace) the portion arranged corresponding to the former channel and the portion arranged corresponding to the latter channel. Therefore, the desiccant material 44 must be configured to be movable (for example, rotatable). In this regard, in the present embodiment, the air dehumidified by the desiccant material 44 and the air for heating and regenerating the desiccant material 44 pass through the same flow path (common air supply path 413) to the desiccant material 44. Since the desiccant material 44 is supplied, it is not necessary to configure the desiccant material 44 to be movable, and the desiccant material 44 can be arranged in a fixed state. Therefore, compared with the case where the desiccant material 44 is configured to be movable, cost reduction and miniaturization can be further achieved.

In addition, the flow of air (regeneration air) supplied to the desiccant material 44 in the regeneration mode and the flow of air (dehumidified air) supplied to the desiccant material 44 during dehumidification (normal mode) are the same. can do. Therefore, the heated air can be applied more reliably to the moisture-adsorbed portion of the desiccant material 44, and the moisture can be effectively evaporated. As a result, the desiccant material 44 can be efficiently regenerated.

In the regeneration mode, air is cooled by vaporization heat of water vapor generated when the desiccant material 44 is heated (during regeneration), and the cooled air is supplied into the double skin 103 . Therefore, the air in the double skin 103 can be replaced with the air from the outside which has been relatively low in dry-bulb temperature due to the heat of vaporization. As a result, it is possible to suppress an excessive temperature rise in the double skin 103, which leads to various problems associated with an excessive temperature rise (for example, an increase in heat transfer through the inner partition of the air temperature in the double structure, which is an air layer). increase in the heat load in the living room 102 due to heating, deterioration of the structure due to heating of the double structure, etc.) can be suppressed more reliably.

Furthermore, the cooling coil 43 can cool the air passing between the total heat exchanger 42 and the desiccant material 44 in the common air supply path 413 . Therefore, when the regeneration mode is switched to the normal mode, even if the desiccant material 44 is in a state of being heated due to the regeneration up to that point, the cooling coil 43 cools the air so that the inside of the living room 102 can be cooled. It is possible to more reliably prevent high-temperature air from being supplied to the . As a result, even immediately after switching from the regeneration mode to the normal mode, it is possible to ensure that the air introduced and supplied from the outside into the living room 102 is comfortable for the personnel in the living room 102.例文帳に追加Also in the normal mode, the cooling coil 43 cools the heat of the outside air due to the heat of adsorption generated when the desiccant material 44 dehumidifies the air introduced from the outside. It is possible to more reliably reduce the heat load of the air conditioner 107 that performs temperature control.

In addition, by using the air-condensed drain water, which is discharged from the air conditioner 107 and discarded as waste water, as a coolant, the cooling of the air by the cooling coil 43 can be performed without using extra electrical energy. This condensed water in the air is cooled to a temperature lower than that of the air coming out of the surface of the dehumidification coil (the coil built into the air conditioner 107) after being temperature-controlled by the temperature controller (the air conditioner 107), and is used as cold heat. Although it has sufficient potential, it was only drained as free water. Therefore, it is possible to effectively utilize the cold energy of the condensed drain water, which is usually simply discharged, and to obtain better performance in terms of energy saving performance and environmental performance.

Further, for example, in winter, air can be exchanged between the inside of the double skin 103 and the living room 102 by operating the first blower fan 48a and the second blower fan 48b. As a result, the inside of the living room 102 can be warmed by using the heat of the air inside the double skin 103 (the heat continuously given through the outer wall due to the heat of the sun), and the heating in the air conditioner 107 of the air circulation inside the living room 102 can be achieved. It is possible to reduce the cost related to air conditioning and the air conditioning load. In summer, etc., the high temperature air in the double skin 103 can be prevented from moving into the living room 102 by stopping both the blower fans 48a and 48b.

Furthermore, in the present embodiment, the operation mode of the device main unit 4 can be automatically switched from the normal mode to the reproduction mode based on the determination result by the determination unit 52, so convenience can be improved.

Further, the determination unit 52 determines whether operation in the regeneration mode is possible based on at least two pieces of information among the information about the time, the information about the carbon dioxide concentration in the living room 102, and the information about the presence or absence of people in the living room 102. determine whether or not Therefore, it is possible to more accurately grasp the timing when operation is possible in the regeneration mode, that is, the timing when ventilation in the living room 102 in the normal mode is stopped without any problem, and the operation in the regeneration mode is performed at a more appropriate timing. be able to.

Further, the cooling coils 43 are controlled by the cooling timing control unit 54 so that the number of the device main bodies 4 for which air is cooled by the cooling coils 43 at the same time is less than the total number of the device main bodies 4 . Therefore, it is possible to more reliably prevent insufficient cooling of the air by the cooling coil 43 due to a shortage of drain water.
[Second embodiment]
Next, the second embodiment will be described, focusing on differences from the first embodiment. As shown in FIG. 5, a computer building 111 as a building in the second embodiment has a plurality of living rooms 102 as well as a computer room 112 in which a large number of computer systems and related devices are installed. ing. In FIG. 5, for convenience of explanation, the computer building 111 and one living room 102 of the computer building 111 are shown separately. Further, the computer building 111 is provided with a double skin 103 forming an outer wall, like the office building 101 in the first embodiment.

Further, a plurality of air conditioners 107 (indoor units are shown, outdoor units are not shown) are provided for air conditioning in the living room 102 and the computer room 112, respectively. Air-condensed drain water is discharged from 107 (cooling coil of the indoor unit). The discharged air-condensed drain water is stored in the drain tank 22 as in the first embodiment.

On the other hand, in the second embodiment, the computer building 111 is not provided with a large number of living rooms 102, and as a result, the number of apparatus main units 4 corresponding to the living rooms 102 is relatively small. . Therefore, the amount of condensed water in the air that is discharged from the air conditioner 107 and stored in the drain tank 22 is sufficiently large relative to the number of the device main bodies 4 .

In consideration of this point, in the second embodiment, cooling of the air by the cooling coils 43 can be simultaneously performed in all the device main units 4 . Specifically, the reproduction mode end time is set using only the basic method for setting the reproduction mode end time described in the first embodiment, so that all the device main units 4 have the cooling coil It is possible to cool the air by 43 at the same time.

As described above, according to the second embodiment, basically the same effects as those of the first embodiment, such as a reduction in the cost of dehumidification and miniaturization of the device, can be achieved.
[Third embodiment]
Next, the third embodiment will be described with a focus on differences from the first embodiment. A store building 121 as a building in the third embodiment is, for example, a convenience store, and has living rooms 122 . The living room 122 is a sales floor room 122a for displaying products, and a backyard room that is installed adjacent to the sales floor room 122a and used as a product warehouse and a space for employees. 122b. In addition, air can be sent from inside the sales floor room 122a to inside the backyard room 122b through the ventilation port 124. - 特許庁In FIG. 6, two store buildings 121 and two living rooms 122 are shown for convenience of illustration, but in reality there are one store building 121 and one living room 122 .

Furthermore, in the first embodiment, the double skin 103 constitutes the outer wall of the office building 101, whereas in the third embodiment, the double skin 123 constitutes the roof of the store building 121. there is A store building 121 such as a convenience store may be a one-storied building, and has a vast roof, which receives sunlight. The double skin 123 is the same as the double skin 103 in the first embodiment in that an intermediate layer is installed as a ceiling space composed of a roof and a ceiling, and the air inside is heated by sunlight or the like. .

In addition, in the third embodiment, the drain water recovery path 21 of the drain water recovery supply device 2 is connected to a refrigerator/freezer 127 as a temperature controller for refrigerating or freezing products by adjusting the air temperature. there is The refrigerator/freezer 127 has an outdoor unit (not shown) outside the store building 121 . Then, air comes into contact with the tube through which the Freon refrigerant of (the air cooling coil of) the refrigerator/freezer 127 (the air cooling coil of the refrigerator/freezer 127 has) and the surface of the fins in close contact with the tube, and moisture in the air is condensed. It is sent to the drain tank 22 via the drain water recovery path 21 and stored in the drain tank 22 .

In addition, in the third embodiment, the air outlet of the first destination air supply passage 411 is set inside the double skin 123, while the air outlet of the second destination air supply passage 412 is located in the sales floor. 122a. That is, the supply destination of the air passing through the common air supply path 413 is configured to branch into the double skin 123 and the counter room 122a.

Furthermore, in the third embodiment, the air suction port of the first inflow source exhaust passage 461 is set in the double skin 123, while the air suction port of the second inflow source exhaust passage 462 is set in the backyard chamber 122b. is set to That is, the air inflow sources for the common exhaust path 463 are both the interior of the double skin 123 and the interior of the backyard chamber 122b.

Further, in the third embodiment, switching from the normal mode to the reproduction mode is performed by manually operating the control device 5, for example.

In the third embodiment, in the normal mode, as shown in FIG. 7, the supply destination of the air through the common air supply passage 413 by the first and second opening/closing valves 45a and 45b is the inside of the sales floor chamber 122a. In addition, the third and fourth opening/closing valves 47a and 47b allow the air to flow into the common exhaust path 463 from the inside of the backyard chamber 122b. As a result, the air that has passed through the total heat exchanger 42 and the desiccant material 44 is supplied into the sales floor room 122a through the air supply path 41, and the air in the backyard room 122b is discharged to the outside through the exhaust path 46. It will be discharged.

On the other hand, in the regeneration mode, as shown in FIG. 8, the supply destination of the air passing through the common air supply passage 413 by the first and second opening/closing valves 45a and 45b is the inside of the double skin 123, and the third and second opening/closing valves 45a and 45b The four on-off valves 47 a and 47 b allow the air to flow into the common exhaust passage 463 from within the double skin 123 . As a result, the air that has passed through the total heat exchanger 42 and the desiccant material 44 is supplied into the double skin 123 through the air supply path 41, and the air in the double skin 123 is discharged to the outside through the exhaust path 46. It will be in a state where

As described above, according to the third embodiment, basically, the same effects as those of the first embodiment, such as a reduction in the cost of dehumidification and a reduction in the size of the device, can be achieved.

In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows. Of course, other applications and modifications not exemplified below are naturally possible.

(a) In the above embodiment, the air-moisture condensed drain water discharged from the air conditioner 107 or the refrigerator/freezer 127 is used as the refrigerant circulating inside the cooling coil 43. A refrigerant may be used.

(b) In the above embodiment, the office building 101, computer building 111 and store building 121 are mentioned as buildings, but the buildings are not limited to these. Therefore, the building may be a relatively high-rise store building, a facility building such as a museum, or a public building such as a government office.

(c) In the above embodiment, each of the supply target switching means and the exhaust target switching means is composed of two open/close valves. good.

(d) In the above embodiment, the total heat exchanger 42 is provided with an air supply fan and an exhaust fan for conveying external air and exhaust air. may be provided to convey the air.

1 Ventilation system 3 Ventilator 4 Apparatus main body 22 Drain tank 41 Air supply path 42 Total heat exchanger 44 Desiccant material 45a First opening/closing valve (air supply target switching means), 45b... second opening/closing valve (air supply target switching means), 46... exhaust path, 47a... third opening/closing valve (exhaust target switching means), 47b... fourth opening/closing valve (exhaust target switching means), 48a... First blower fan 48b Second blower fan 51 Time information acquisition unit (time information acquisition means) 52 Judgment unit (judgment means) 53 Operation mode switching unit (operation mode switching means) 54 Cooling Timing control unit (cooling timing control means) 101... Office building (building) 102, 122... Living room 103, 123... Double skin 105... CO ₂ sensor (concentration information acquisition means) 106... Heat sensor (person Presence/absence information acquisition means), 107 Air conditioner (temperature controller) 111 Computing building (building) 121 Store building (building) 127 Refrigerator/freezer (temperature controller) 413 Common air supply path 463 … common exhaust path.

Claims (5)

A ventilation device provided corresponding to a living room in a building comprising a living room, an outer wall and a roof,
The outer wall part or the roof part has a double skin that is a double structure of a wall or ceiling that heats the internal air at least by solar radiation,
an air supply path having a common air supply path into which air flows from the outside, and configured such that the supply destination of the air passing through the common air supply path branches into the living room and the double skin;
a desiccant material installed in the common air supply path and capable of dehumidifying air passing through the common air supply path by adsorbing moisture;
air supply target switching means for switching the supply destination of the air passing through the common air supply path to the living room or the double skin;
an exhaust path having a common exhaust path through which air to be discharged to the outside passes, and configured so that the air inflow sources for the common exhaust path are the interior of the living room and the double skin;
Exhaust target switching means for switching an inflow source of air to the common exhaust passage to the living room or the double skin;
a total heat exchanger having a total heat exchange element, an air supply fan, and an exhaust fan that can perform total heat exchange between the air passing through the common air supply path and the air passing through the common exhaust path;
An apparatus main body comprising a cooling means installed between the total heat exchanger and the desiccant material in the common air supply path and capable of cooling air passing through the common air supply path by flowing a predetermined refrigerant therein. has a part
The desiccant material is arranged in a fixed state,
The device main body is operable in a predetermined normal mode or a predetermined reproduction mode,
In the normal mode, the supply destination of the air passing through the common air supply path is set to the living room by the air supply target switching means, and the air inflow source to the common exhaust path is set to the above by the exhaust target switching means. By being in a living room, the air passing through the total heat exchanger and the desiccant material is supplied into the living room through the air supply path,
In the regeneration mode, the supply destination of the air passing through the common air supply passage is set to the inside of the double skin by the air supply target switching means, and the air inflow source to the common exhaust passage is set by the exhaust target switching means. By being inside the double skin, the total heat exchanger heats the air passing through the common air supply passage using the air that flows out from inside the double skin and passes through the common exhaust passage, and the heated air passes through the common air exhaust passage. A ventilator, wherein the desiccant material is heated and regenerated by the heated air. 2. The ventilator according to claim 1, wherein at least condensed drain water discharged from a temperature controller capable of adjusting air temperature is used as the refrigerant. The device main body is
a first blower fan provided corresponding to a first communication portion that communicates from the inside of the double skin to the living room, and for sending the air inside the double skin into the living room;
and a second blower fan provided corresponding to a second communicating portion communicating from the living room to the inside of the double skin for sending air in the living room to the inside of the double skin. 3. The ventilator according to any one of 1 or 2. determination means for determining whether or not the apparatus main body can operate in the reproduction mode;
An operation mode switching capable of switching the operation mode of the apparatus main body from the normal mode to the reproduction mode when the determination means determines that the apparatus main body can operate in the reproduction mode. means and
The determination means includes time information acquisition means for acquiring information on time, concentration information acquisition means for acquiring information on carbon dioxide concentration in the living room, and information on the presence or absence of people in the living room. 4. Judgment as to whether or not the operation in the reproduction mode is possible based on at least two pieces of information acquired from at least two of the person presence/absence information acquisition means. Ventilation equipment as described above. A ventilation system comprising a plurality of the device main bodies according to any one of claims 1 to 4,
It has a drain tank for storing at least air-moisture condensed drain water discharged from a temperature controller capable of adjusting air temperature, and the air-moisture condensed drain water stored in the drain tank is used as the refrigerant. configured,
A ventilation system, comprising cooling timing control means for controlling said cooling means so that the number of said device main bodies for which air is simultaneously cooled by said cooling means is less than the total number of said device main bodies.

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