JP2021071209A - Ventilation device - Google Patents

Abstract

To provide a ventilation device which can prevent; external air flowing in a first air passage after passing through a humidity control section from affecting an opening and closing member; and the opening and closing member from being cooled and building up dew condensation.SOLUTION: A ventilation device 10 comprises: a casing; humidity control sections 12 and 13; a bypass passage 16; an opening and closing damper 17; and an air supply fan 15. The casing has an external air intake port 21 and an air supply port 22. The bypass passage 16 guides external air taken into the casing through the external air intake port 21 to the air supply port 22 without allowing the same to pass through the humidity control sections 12 and 13. In the casing, a first air passage 31 where the external air flows therein after passing through the humidity control sections 12 and 13 is arranged between the humidity control sections 12 and 13 and the air supply port 22. The bypass passage 16 is connected to the first air passage 31. The opening and closing damper 17 which opens and closes the bypass passage 16 is arranged in the bypass passage 16 at a position 150 mm or more away from a connection section between the bypass passage 16 and the first air passage 31.SELECTED DRAWING: Figure 3

Description

Regarding the ventilation system.

Conventionally, in a humidity control device having a ventilation function, a bypass passage for supplying outside air to the room as it is during a simple ventilation operation is provided. The bypass passage is provided with a damper for closing the bypass passage during the dehumidifying ventilation operation and the humidifying ventilation operation. The damper is arranged at a position facing the air supply fan chamber in which the air supply fan is arranged. (Patent Document 1 (Japanese Patent Laid-Open No. 2009-74786)).

In the above device, since the damper is arranged at a position facing the air supply fan chamber, the air dehumidified and cooled by the adsorption heat exchanger flows into the air supply fan chamber, especially during the dehumidifying and ventilation operation, and the damper is generated. It is cooled. Therefore, there is a problem that the damper is liable to condense, and it is necessary to temporarily stop the dehumidifying / ventilation operation of the humidity control device to dry the damper.

The ventilation device of the first aspect takes in outside air and sends it indoors as supply air. The ventilation device includes a casing, a humidity control section, a bypass passage, an opening / closing member, and an air supply fan. The casing is formed with an outside air intake and an air supply port. The humidity control unit controls the humidity of the outside air taken into the casing from the outside air intake port. The bypass passage guides the outside air taken into the casing from the outside air intake to the air supply port without passing through the humidity control part. The opening / closing member is provided in the bypass passage and opens / closes the bypass passage. The air supply fan sends the humidity-controlled outside air or the outside air that has passed through the bypass passage into the room through the air supply port as the supply air. In the casing, a first air passage through which the outside air passing through the humidity control portion passes is formed between the humidity control portion and the air supply port. The bypass passage is connected to the first air passage. The opening / closing member is arranged in the bypass passage at a distance of 150 mm or more from the connecting portion between the bypass passage and the first air passage.

In this ventilation device, since the opening / closing member is arranged in the bypass passage at a distance of 150 mm or more from the connecting portion between the bypass passage and the first ventilation passage, the outside air passing through the humidity control portion flowing through the first air passage is discharged. It is possible to suppress the influence on the opening / closing member. Therefore, it is possible to prevent the opening / closing member from cooling and condensing.

The ventilation device of the second aspect is the device of the first aspect, and the air supply fan is arranged in the vicinity of the air supply port of the first air passage.

In this ventilation system, the air supply fan is arranged at the most downstream of the air flow in which the outside air taken into the casing from the outside air intake port flows through the humidity control portion to the air supply port. In other words, the outside air taken into the casing is pulled by the air supply fan. Therefore, it is possible to prevent the outside air from flowing from the first air passage to the bypass passage.

The ventilation device of the third aspect is the device of the second aspect, and the air supply fan and the bypass passage are arranged so as to sandwich the humidity control portion.

This ventilation system allows the air supply fan to be separated from the bypass passage. Therefore, it is possible to further suppress the flow of outside air from the first air passage to the bypass passage.

The ventilation device of the fourth aspect is the device of the third aspect, and a second air passage through which the outside air taken into the casing passes is formed in the casing between the outside air intake port and the humidity control portion. There is. The first air passage and the second air passage are arranged so as to sandwich the humidity control portion. The bypass passage is connected to the first air passage and the second air passage.

The ventilation device of the fifth aspect is any device from the first aspect to the fourth aspect, and further includes a control unit. The control unit can switch between the first ventilation operation and the second ventilation operation. In the first ventilation operation, the outside air taken in from the outside air intake is sent into the room as supply air through the humidity control unit. In the second ventilation operation, the outside air taken in from the outside air intake is sent into the room as supply air through the bypass passage without passing through the humidity control part. The control unit closes the opening / closing member in the first ventilation operation and opens the opening / closing member in the second ventilation operation.

In this ventilation device, since the air can be sent into the room as supply air through the bypass passage without passing through the humidity control portion during the second ventilation operation, the fan power during the second ventilation operation can be reduced.

The ventilation device of the sixth aspect is the device of the fifth aspect, and the control unit switches between the first ventilation operation and the second ventilation operation based on an instruction from the outside.

In this ventilation device, the first ventilation operation and the second ventilation operation can be switched by an external instruction, for example, a user instruction via a remote controller.

The ventilation device of the seventh aspect is the device of the fifth aspect, and further includes a humidity detection unit for detecting the humidity in the room. The control unit switches between the first ventilation operation and the second ventilation operation based on the humidity detected by the humidity detection unit.

In this ventilation device, the first ventilation operation and the second ventilation operation can be automatically switched based on the humidity detected by the humidity detection unit.

The ventilation device of the eighth aspect is any of the devices from the first aspect to the seventh aspect, and the opening / closing member is inclined with respect to the plane orthogonal to the direction in which the bypass passage extends.

In this ventilation device, the opening area when the opening / closing member is open can be increased as compared with the case where the opening / closing member is arranged along the direction orthogonal to the direction in which the bypass passage extends. Therefore, it is possible to reduce the ventilation resistance when the outside air passes through the bypass passage, and it is possible to save energy.

The ventilation device of the ninth aspect is any of the devices from the first aspect to the eighth aspect, and the casing has a return air port for taking indoor air into the casing as return air and a casing with indoor air as exhaust. An exhaust port, which discharges to the outside, is further formed. The casing is further provided with an exhaust fan that exhausts indoor air as exhaust air from an exhaust port.

External perspective view of the ventilation system. The external perspective view of the ventilation system as seen from the direction different from FIG. Top view of the ventilation system. Bottom view of the ventilation system. Side view of the ventilation system. Refrigerant circuit for humidity control of ventilation system. Side view of the bypass passage of the ventilation system. Top view of the bypass passage of the ventilation system. The schematic diagram which shows the state of the air flow and the refrigerant circuit in the 1st operation of the dehumidifying operation of a ventilator. The plan view which shows the passage of the 1st air in the 1st operation of a dehumidifying operation. The plan view which shows the passage of the 2nd air in the 1st operation of a dehumidifying operation. The schematic diagram which shows the state of the air flow and the refrigerant circuit in the 2nd operation of the dehumidifying operation of a ventilator. The plan view which shows the passage of the 1st air in the 2nd operation of a dehumidifying operation. The plan view which shows the passage of the 2nd air in the 2nd operation of a dehumidifying operation. The schematic diagram which shows the state of the air flow and the refrigerant circuit in the 1st operation of the humidification operation of a ventilation system. The plan view which shows the passage of the 1st air in the 1st operation of a humidification operation. The plan view which shows the passage of the 2nd air in the 1st operation of a humidification operation. The schematic diagram which shows the state of the air flow and the refrigerant circuit in the 2nd operation of the humidification operation of a ventilator. The plan view which shows the passage of the 1st air in the 2nd operation of a humidification operation. The plan view which shows the passage of the 2nd air in the 2nd operation of a humidification operation. The figure which shows the passage of the 1st air at the time of the ventilation operation of a ventilation system. The figure which shows the passage of the 2nd air at the time of the ventilation operation of a ventilation system.

<First Embodiment>
(1) Overall Configuration FIGS. 1 and 2 are external perspective views of the ventilation device 10, FIG. 3 is a plan view of the ventilation device 10, FIG. 4 is a bottom view of the ventilation device 10, and FIG. 5 is a ventilation device. It is a side view of 10. In the following description, the upper and lower directions are the directions shown in FIGS. 1 to 5.

The ventilation device 10 includes a casing 11, a first adsorption heat exchanger 12, a second adsorption heat exchanger 13, an exhaust fan 14, an air supply fan 15, a bypass passage 16, and an opening / closing damper (opening / closing member) 17. , And a control unit 18.

The casing 11 is formed with an outside air intake port 21, an air supply port 22, a return air port 23, and an exhaust port 24. The outside air intake port 21 and the exhaust port 24 are formed on the first surface A of the casing 11. The exhaust port 24 is formed at a position above the outside air intake port 21. Further, the air supply port 22 and the return air port 23 are formed on the second surface B on the side opposite to the first surface A of the casing 11. The air supply port 22 and the return air port 23 are formed on the lower side of the second surface B.

The first adsorption heat exchanger 12 and the second adsorption heat exchanger 13 are both composed of a cross-fin type fin-and-tube heat exchanger. These adsorption heat exchangers 12 and 13 include a copper heat transfer tube (not shown) and aluminum fins (not shown). In each of the adsorption heat exchangers 12 and 13, an adsorbent is supported on the surface of each fin, and the air passing between the fins comes into contact with the adsorbent carried on the fins. As the adsorbent, those capable of adsorbing water vapor in the air, such as zeolite, silica gel, activated carbon, and an organic polymer material having a hydrophilic functional group, are used. The first adsorption heat exchanger 12 and the second adsorption heat exchanger 13 constitute a humidity control member.

The exhaust fan 14 discharges the indoor air RA of the indoor space RS to the outside after the humidity control treatment. The exhaust fan 14 is arranged at the most downstream of the air flow in which the indoor air taken into the casing 11 from the return air port 23 flows to the exhaust port 24 through the first adsorption heat exchanger 12 or the second adsorption heat exchanger 13. Will be done. In other words, the indoor air taken into the casing 11 is pulled by the exhaust fan 14.

The air supply fan 15 supplies the outdoor air OA (outside air) to the indoor space RS after the humidity control treatment. The air supply fan 15 is located at the most downstream of the air flow in which the outside air taken into the casing 11 from the outside air intake port 21 flows through the first adsorption heat exchanger 12 or the second adsorption heat exchanger 13 to the air supply port 22. Be placed. In other words, the outside air taken into the casing 11 is pulled by the air supply fan 15.

A first air passage 31, a second air passage 32, a third air passage 33, and a fourth air passage 34 are formed in the casing 11. The first air passage 31 is formed between the air supply port 22 and the first adsorption heat exchanger 12 and the second adsorption heat exchanger 13, and is formed in the first adsorption heat exchanger 12 or the second adsorption heat exchanger 13. The outside air that has passed through 13 passes through. The second air passage 32 is formed between the outside air intake port 21, the first adsorption heat exchanger 12, and the second adsorption heat exchanger 13, and the outside air taken into the casing 11 passes through the second air passage 32. The third air passage 33 is formed between the return air port 23 and the first adsorption heat exchanger 12 and the second adsorption heat exchanger 13, and the indoor air taken into the casing 11 passes through the third air passage 33. The fourth air passage 34 is formed between the exhaust port 24 and the first adsorption heat exchanger 12 and the second adsorption heat exchanger 13, and is formed in the first adsorption heat exchanger 12 or the second adsorption heat exchanger 13. The indoor air that has passed through passes through.

The first air passage 31 and the third air passage 33, and the second air passage 32 and the fourth air passage 34 are arranged so as to sandwich the first adsorption heat exchanger 12 and the second adsorption heat exchanger 13. The first air passage 31 and the third air passage 33 are arranged in the vertical direction along the second surface B of the casing 11, and the first air passage 31 is arranged on the third air passage 33. The second air passage 32 and the fourth air passage 34 are arranged in the vertical direction along the first surface A of the casing 11, and the second air passage 32 is arranged below the fourth air passage 34. Further, the first air passage 31 extends downward at the position where the air supply fan 15 is arranged and is connected to the air supply port 22. The third air passage 33 extends from a position facing the first adsorption heat exchanger 12 and the second adsorption heat exchanger 13 to the front of the position where the air supply fan 15 is arranged.

The ventilation device 10 includes eight switching mechanisms 41 to 48 that switch the communication between the first to fourth air passages 31 to 34 and the first adsorption heat exchanger 12 and the second adsorption heat exchanger 13. The first switching mechanism 41 is arranged between the first air passage 31 and the first adsorption heat exchanger 12. The second switching mechanism 42 is arranged between the first air passage 31 and the second adsorption heat exchanger 13. The third switching mechanism 43 is arranged between the second air passage 32 and the first adsorption heat exchanger 12. The fourth switching mechanism 44 is arranged between the second air passage 32 and the second adsorption heat exchanger 13. The fifth switching mechanism 45 is arranged between the third air passage 33 and the first adsorption heat exchanger 12. The sixth switching mechanism 46 is arranged between the third air passage 33 and the second adsorption heat exchanger 13. The seventh switching mechanism 47 is arranged between the fourth air passage 34 and the first adsorption heat exchanger 12. The eighth switching mechanism 48 is arranged between the fourth air passage 34 and the second adsorption heat exchanger 13. For example, an opening / closing damper is used in the first to eighth switching mechanisms 41 to 48, and by opening and closing, the first to fourth air passages 31 to 34, the first adsorption heat exchanger 12, and the second adsorption heat exchanger 13 are used. Switch the communication with. When the opening / closing damper is used as the first to eighth switching mechanisms 41 to 48, the length thereof is substantially the same as the length of the first adsorption heat exchanger 12 and the second adsorption heat exchanger 13.

One end of the bypass passage 16 is connected to the first air passage 31, and the other end is connected to the second air passage 32. The opening / closing damper 17 is provided in the bypass passage 16 and opens / closes the bypass passage 16. The detailed configuration of the bypass passage 16 will be described later.

The control unit 18 controls the operation of each unit constituting the ventilation device 10. The control unit 18 is realized by a computer. The control unit 18 can exchange control signals and the like with a remote controller (not shown) for individually operating the ventilation device 10. The control unit 18 includes a control arithmetic unit and a storage device. A processor such as a CPU or GPU can be used as the control arithmetic unit. The control arithmetic unit reads a program stored in the storage device and performs a predetermined arithmetic processing according to the program. Further, the control arithmetic unit can write the arithmetic result to the storage device and read the information stored in the storage device according to the program. The storage device can be used as a database.

As shown in FIG. 9, the humidity control device (ventilator) 10 is provided with various sensors. On the outdoor air suction side of the humidity control device 10, an outside air temperature sensor 61 that detects the temperature of the outdoor air OA (outside air temperature Toa) and an outside air humidity sensor 62 that detects the humidity of the outdoor air OA (outside air humidity Hoa) are provided. It is provided. On the indoor air suction side of the humidity control device 10, an indoor temperature sensor 63 that detects the temperature of the indoor air RA (indoor temperature Tra) and an indoor humidity sensor (humidity detection) that detects the humidity of the indoor air RA (indoor humidity Hra). Part) 64 is provided. In the present embodiment, the outside air temperature sensor 61 and the room temperature sensor 63 are composed of a thermistor.

(2) Humidity control refrigerant circuit 20
The humidity control refrigerant circuit 20 of the ventilation device 10 is shown in FIG. The humidity control refrigerant circuit 20 includes a first adsorption heat exchanger (humidity control section) 12, a second adsorption heat exchanger (humidity control section) 13, a compressor 51, a four-way switching valve 52, and electric expansion. It has a valve 53.

The humidity control refrigerant circuit 20 performs a steam compression refrigeration cycle by circulating the filled refrigerant. In the humidity control refrigerant circuit 20, the discharge side of the compressor 51 is connected to the first port of the four-way switching valve 52, and the suction side thereof is connected to the second port of the four-way switching valve 52. One end of the first adsorption heat exchanger 12 is connected to the third port of the four-way switching valve 52. The other end of the first adsorption heat exchanger 12 is connected to one end of the second adsorption heat exchanger 13 via an electric expansion valve 53. The other end of the second adsorption heat exchanger 13 is connected to the fourth port of the four-way switching valve 52.

The four-way switching valve 52 has a first state (states shown in FIGS. 9 and 15) in which the first port and the third port communicate with each other and the second port and the fourth port communicate with each other, and a first port. And the fourth port communicate with each other, and the second port and the third port communicate with each other in a second state (states shown in FIGS. 12 and 18).

(3) Bypass passage FIG. 7 is a side view of the bypass passage 16 of the ventilation device 10. FIG. 8 is a plan view of the bypass passage 16 of the ventilation device 10. As shown in FIGS. 1 to 4, the bypass passage 16 is arranged so as to sandwich the exhaust fan 14, the air supply fan 15, the first adsorption heat exchanger 12 and the second adsorption heat exchanger 13. On the first surface C of the bypass passage 16 on the side where the first adsorption heat exchanger 12 and the second adsorption heat exchanger 13 are arranged, a first opening 71 connected to the first air passage 31 and a second opening 71 are provided. A second opening 72 connected to the air passage 32 is formed.

As shown in FIG. 7, the opening / closing damper 17 is provided in the bypass passage 16 and is inclined with respect to a plane (YZ plane in FIG. 8) orthogonal to the direction in which the bypass passage 16 extends (X-axis direction in FIG. 8). doing.

As shown in FIG. 8, the opening / closing damper 17 is arranged at a distance L from the connecting portion D of the bypass passage 16 and the first air passage 31. The connection portion D is an end portion of the first switching mechanism 41 on the bypass passage 16 side. The air that has passed through the first adsorption heat exchanger 12 and the second adsorption heat exchanger 13 flows to the first air passage 31 through the first switching mechanism 41 and the second switching mechanism 42. Since the air supply fan 15 is provided in the vicinity of the air supply port 22, the air flowing out to the first air passage 31 flows toward the air supply port 22. Therefore, in the first air passage 31, almost no air flows to the bypass passage 16 side of the connection portion D. Therefore, here, the connecting portion D between the first air passage 31 and the bypass passage 16 is the end portion of the first switching mechanism 41 on the bypass passage 16 side.

The distance L is 150 mm or more. The distance L may be 150 mm or more, and the longer the distance L, the more preferable it is in that dew condensation on the opening / closing damper 17 is suppressed. The upper limit of the distance L depends on the length of the bypass passage 16 in the extending direction, but may be a connecting portion between the bypass passage 16 and the second air passage 32. As for the arrangement of the opening / closing damper 17 when the distance L is the upper limit, for example, since the opening / closing damper 17 is provided so as to be inclined with respect to the plane orthogonal to the direction in which the bypass passage 16 extends, the upper end of the opening / closing damper 17 is provided. The position may be in contact with the surface of the bypass passage 16 on the second air passage 32 side. Further, although the size of the opening / closing damper 17 is reduced, the position of the opening / closing damper 17 is, for example, the connection portion E between the bypass passage 16 and the second air passage 32 (in other words, the bypass passage 16 side of the third switching mechanism 43). It may be the end of).

The distance L is the shortest distance from the connecting portion D to the opening / closing damper 17. As shown in FIGS. 7 and 8, as a specific method for measuring the distance L, for example, the starting point is the position where the vertical line passing through the connecting portion D and the bottom surface of the first air passage 31 intersect. 1 The position where the distance L1 extending from the first opening 71 to the first opening 71 along the longitudinal direction of the air passage 31 and the line extending from the first opening 71 in the direction perpendicular to the inclined surface of the opening / closing damper 17 intersect with the opening / closing damper 17. It is measured by adding the distance L2 to.

(4) Overall operation (4-1) Operation of ventilation device In the ventilation device 10 of the present embodiment, a dehumidifying operation, a humidifying operation, or a simple ventilation operation is performed. The dehumidifying operation is a ventilation operation in which the dehumidified outside air is sent into the room as supply air. Humidification operation is a ventilation operation that sends humidified outside air into the room as supply air. The simple ventilation operation is an operation in which outside air is sent indoors as supply air without dehumidifying or humidifying.

In the first embodiment, in the first ventilation operation, the outdoor air OA taken in from the outside air intake port 21 is sent into the room as air supply through the first adsorption heat exchanger 12 or the second adsorption heat exchanger 13. The dehumidifying operation and the humidifying operation are the first ventilation operations. In the second ventilation operation, the outdoor air OA taken in from the outside air intake 21 is sent into the room as air supply through the bypass passage 16 without passing through the first adsorption heat exchanger 12 or the second adsorption heat exchanger 13. .. The simple ventilation operation is the second ventilation operation. The control unit 18 switches between the first ventilation operation and the second ventilation operation based on an external instruction such as a remote controller. Further, the control unit 18 switches between the first ventilation operation and the second ventilation operation based on the humidity detected by the indoor humidity sensor 64.

The ventilation device 10 during the dehumidifying operation or the humidifying operation adjusts the humidity of the taken-in outdoor air OA and then supplies it to the room as the supply air SA, and at the same time, discharges the taken-in indoor air RA to the outside as the exhaust air EA.

(5) Detailed operation (5-1) Dehumidifying operation In the ventilation device 10 during the dehumidifying operation, the first operation and the second operation, which will be described later, are alternately repeated at predetermined time intervals (for example, every 3 minutes). During the dehumidifying operation, the opening / closing damper 17 of the bypass passage 16 is closed.

First, the first operation of the dehumidifying operation will be described with reference to FIGS. 9 to 11. As shown in FIG. 9, during this first operation, the fourth switching mechanism 44 brings the outdoor space OS and the second adsorption heat exchanger 13 into communication with each other, and the second switching mechanism 42 communicates with the indoor space RS and the second. The adsorption heat exchanger 13 is in a communicative state. Further, during the first operation, the fifth switching mechanism 45 communicates the indoor space RS with the first adsorption heat exchanger 12, and the seventh switching mechanism 47 communicates with the outdoor space OS and the first adsorption heat exchanger 12. To communicate. Then, in this state, the air supply fan 15 and the exhaust fan 14 of the ventilation device 10 are operated. When the air supply fan 15 is operated, the outdoor air OA passes through the second adsorption heat exchanger 13 as the first air and is supplied to the indoor space RS. When the exhaust fan 14 is operated, the indoor air RA passes through the first adsorption heat exchanger 12 as the second air and is discharged to the outdoor space OS. The path through which the second air passes through the first adsorption heat exchanger 12 and the path through which the first air passes through the second adsorption heat exchanger 13 do not intersect. This is not limited to the first operation of the dehumidifying operation. Further, the "first air" referred to here is air that passes through the inside of the ventilation device 10 from the outdoor space OS and is supplied to the indoor space RS, and the "second air" is the air that is supplied from the indoor space RS to the ventilation device 10. It is the air that passes through the inside of the room and is discharged to the outdoor space OS.

In the humidity control refrigerant circuit 20 during the first operation, as shown in FIG. 9, the four-way switching valve 52 is set to the first state. In the humidity control refrigerant circuit 20 in this state, the refrigerant circulates and the refrigeration cycle is performed. At that time, in the humidity control refrigerant circuit 20, the refrigerant discharged from the compressor 51 passes through the first adsorption heat exchanger 12, the electric expansion valve 53, and the second adsorption heat exchanger 13 in this order, and the first adsorption heat exchange occurs. The vessel 12 serves as a radiator and the second adsorption heat exchanger 13 serves as an evaporator.

The first air passes through the second adsorption heat exchanger 13 through the fourth switching mechanism 44. In the second adsorption heat exchanger 13, the moisture in the first air is adsorbed by the adsorbent, and the heat of adsorption generated at that time is absorbed by the refrigerant. The first air dehumidified by the second adsorption heat exchanger 13 is supplied to the indoor space RS by the air supply fan 15 through the second switching mechanism 42.

On the other hand, the second air passes through the first adsorption heat exchanger 12 through the fifth switching mechanism 45. In the first adsorption heat exchanger 12, moisture is desorbed from the adsorbent heated by the refrigerant, and the desorbed moisture is imparted to the second air. The second air moistened by the first adsorption heat exchanger 12 is discharged to the outdoor space OS by the exhaust fan 14 through the seventh switching mechanism 47.

FIG. 10 shows a passage of the first air during the first operation of the dehumidifying operation. As shown in FIG. 10, the outdoor air OA taken into the casing 11 from the outside air intake port 21 passes through the second adsorption heat exchanger 13 which is an evaporator. The air supply fan 15 sends the humidity-controlled outdoor air OA as the supply air SA into the room through the air supply port 22.

FIG. 11 shows a passage of the second air during the first operation of the dehumidifying operation. As shown in FIG. 11, the indoor air RA taken into the casing 11 from the return air port 23 passes through the first adsorption heat exchanger 12 which is a radiator. The exhaust fan 14 discharges the indoor air RA as the exhaust air EA from the exhaust port 24.

The second operation of the dehumidifying operation will be described with reference to FIGS. 12 to 14. As shown in FIG. 12, during this second operation, the third switching mechanism 43 communicates the outdoor space OS with the first adsorption heat exchanger 12, and the first switching mechanism 41 communicates with the indoor space RS. The adsorption heat exchanger 12 is in a communicative state. Further, during the second operation, the sixth switching mechanism 46 communicates the indoor space RS with the second adsorption heat exchanger 13, and the eighth switching mechanism 48 communicates with the outdoor space OS and the second adsorption heat exchanger 13. To communicate. Then, in this state, the air supply fan 15 and the exhaust fan 14 of the ventilation device 10 are operated. When the air supply fan 15 is operated, the outdoor air OA passes through the first adsorption heat exchanger 12 as the first air and is supplied to the indoor space RS. When the exhaust fan 14 is operated, the indoor air RA passes through the second adsorption heat exchanger 13 as the second air and is discharged to the outdoor space OS.

In the humidity control refrigerant circuit 20 during the second operation, as shown in FIG. 12, the four-way switching valve 52 is set to the second state. In the humidity control refrigerant circuit 20 in this state, the refrigerant circulates and the refrigeration cycle is performed. At that time, in the humidity control refrigerant circuit 20, the refrigerant discharged from the compressor 51 passes through the second adsorption heat exchanger 13, the electric expansion valve 53, and the first adsorption heat exchanger 12 in this order, and the first adsorption heat exchange occurs. The vessel 12 serves as an evaporator and the second adsorption heat exchanger 13 serves as a radiator.

The first air passes through the first adsorption heat exchanger 12 through the third switching mechanism 43. In the first adsorption heat exchanger 12, the moisture in the first air is adsorbed by the adsorbent, and the heat of adsorption generated at that time is absorbed by the refrigerant. The first air dehumidified by the first adsorption heat exchanger 12 is supplied to the indoor space RS by the air supply fan 15 through the first switching mechanism 41.

On the other hand, the second air passes through the second adsorption heat exchanger 13 through the sixth switching mechanism 46. In the second adsorption heat exchanger 13, moisture is desorbed from the adsorbent heated by the refrigerant, and the desorbed moisture is applied to the second air. The second air moisturized by the second adsorption heat exchanger 13 is discharged to the outdoor space OS by the exhaust fan 14 through the eighth switching mechanism 48.

FIG. 13 shows a passage of the first air during the second operation of the dehumidifying operation. As shown in FIG. 13, the outdoor air OA taken into the casing 11 from the outside air intake port 21 passes through the first adsorption heat exchanger 12 which is an evaporator. The air supply fan 15 sends the humidity-controlled outdoor air OA as the supply air SA into the room through the air supply port 22.

FIG. 14 shows a passage of the second air during the second operation of the dehumidifying operation. As shown in FIG. 14, the indoor air RA taken into the casing 11 from the return air port 23 passes through the second adsorption heat exchanger 13 which is a radiator. The exhaust fan 14 discharges the indoor air RA as the exhaust air EA from the exhaust port 24.

(5-2) Humidifying Operation In the ventilation device 10 during the humidifying operation, the first operation and the second operation, which will be described later, are alternately repeated at predetermined time intervals (for example, every 3 minutes). During the humidification operation, the opening / closing damper 17 of the bypass passage 16 is closed.

First, the first operation of the humidification operation will be described with reference to FIGS. 15 to 17. As shown in FIG. 15, during this first operation, the third switching mechanism 43 communicates the outdoor space OS with the first adsorption heat exchanger 12, and the first switching mechanism 41 communicates with the indoor space RS. The adsorption heat exchanger 12 is in a communicative state. Further, during the first operation, the sixth switching mechanism 46 communicates the indoor space RS with the second adsorption heat exchanger 13, and the eighth switching mechanism 48 communicates with the outdoor space OS and the second adsorption heat exchanger 13. To communicate. Then, in this state, the air supply fan 15 and the exhaust fan 14 of the ventilation device 10 are operated. When the air supply fan 15 is operated, the outdoor air OA passes through the first adsorption heat exchanger 12 as the first air and is supplied to the indoor space RS. When the exhaust fan 14 is operated, the indoor air RA passes through the second adsorption heat exchanger 13 as the second air and is discharged to the outdoor space OS.

In the humidity control refrigerant circuit 20 during the first operation, as shown in FIG. 15, the four-way switching valve 52 is set to the first state. Then, in the humidity control refrigerant circuit 20, the first adsorption heat exchanger 12 serves as a radiator and the second adsorption heat exchanger 13 serves as an evaporator, as in the first operation of the dehumidification operation.

The first air passes through the third switching mechanism 43 and then through the first adsorption heat exchanger 12. In the first adsorption heat exchanger 12, moisture is desorbed from the adsorbent heated by the refrigerant, and the desorbed moisture is applied to the first air. The first air humidified by the first adsorption heat exchanger 12 is supplied to the indoor space RS by the air supply fan 15 through the first switching mechanism 41.

On the other hand, the second air passes through the sixth switching mechanism 46 and then through the second adsorption heat exchanger 13. In the second adsorption heat exchanger 13, the moisture in the second air is adsorbed by the adsorbent, and the heat of adsorption generated at that time is absorbed by the refrigerant. The second air, which has been deprived of moisture by the second adsorption heat exchanger 13, is discharged to the outdoor space OS by the exhaust fan 14 through the eighth switching mechanism 48.

FIG. 16 shows a passage of the first air during the first operation of the humidification operation. As shown in FIG. 16, the outdoor air OA taken into the casing 11 from the outside air intake port 21 passes through the first adsorption heat exchanger 12 which is a radiator. The air supply fan 15 sends the humidity-controlled outdoor air OA as the supply air SA into the room through the air supply port 22.

FIG. 17 shows a passage of the second air during the first operation of the humidification operation. As shown in FIG. 17, the indoor air RA taken into the casing 11 from the return air port 23 passes through the second adsorption heat exchanger 13 which is an evaporator. The exhaust fan 14 discharges the indoor air RA as the exhaust air EA from the exhaust port 24.

The second operation of the humidification operation will be described with reference to FIGS. 18 to 20. As shown in FIG. 18, during this second operation, the fourth switching mechanism 44 brings the outdoor space OS and the second adsorption heat exchanger 13 into communication with each other, and the second switching mechanism 42 communicates with the indoor space RS and the second. The adsorption heat exchanger 13 is in a communicative state. Further, during the second operation, the fifth switching mechanism 45 communicates the indoor space RS with the first adsorption heat exchanger 12, and the seventh switching mechanism 47 communicates with the outdoor space OS and the first adsorption heat exchanger 12. To communicate. Then, in this state, the air supply fan 15 and the exhaust fan 14 of the ventilation device 10 are operated. When the air supply fan 15 is operated, the outdoor air OA passes through the second adsorption heat exchanger 13 as the first air and is supplied to the indoor space RS. When the exhaust fan 14 is operated, the indoor air RA passes through the first adsorption heat exchanger 12 as the second air and is discharged to the outdoor space OS.

In the humidity control refrigerant circuit 20 during the second operation, as shown in FIG. 18, the four-way switching valve 52 is set to the second state. Then, in the humidity control refrigerant circuit 20, the first adsorption heat exchanger 12 serves as an evaporator and the second adsorption heat exchanger 13 serves as a radiator, as in the second operation of the dehumidification operation.

The first air passes through the second adsorption heat exchanger 13 through the fourth switching mechanism 44. In the second adsorption heat exchanger 13, moisture is desorbed from the adsorbent heated by the refrigerant, and the desorbed moisture is applied to the first air. The first air humidified by the second adsorption heat exchanger 13 is supplied to the indoor space RS by the air supply fan 15 through the second switching mechanism 42.

On the other hand, the second air passes through the first adsorption heat exchanger 12 through the fifth switching mechanism 45. In the first adsorption heat exchanger 12, the moisture in the second air is adsorbed by the adsorbent, and the heat of adsorption generated at that time is absorbed by the refrigerant. The second air, which has been deprived of moisture by the first adsorption heat exchanger 12, passes through the seventh switching mechanism 47, passes through the exhaust fan 14, and is discharged to the outdoor space OS.

FIG. 19 shows a passage of the first air during the second operation of the humidification operation. As shown in FIG. 19, the outdoor air OA taken into the casing 11 from the outside air intake 21 passes through the second adsorption heat exchanger 13 which is a radiator. The air supply fan 15 sends the humidity-controlled outdoor air OA as the supply air SA into the room through the air supply port 22.

FIG. 20 shows a passage of the second air during the second operation of the humidification operation. As shown in FIG. 20, the indoor air RA taken into the casing 11 from the return air port 23 passes through the first adsorption heat exchanger 12 which is an evaporator. The exhaust fan 14 discharges the indoor air RA as the exhaust air EA from the exhaust port 24.

(5-3) Simple Ventilation Operation It is assumed that the compressor 51 is temporarily stopped during the simple ventilation operation, and no refrigerant is flowing through the first adsorption heat exchanger 12 and the second adsorption heat exchanger 13. During the simple ventilation operation, the opening / closing damper 17 of the bypass passage 16 is open.

The passage of the first air in the simple ventilation operation is shown in FIG. As shown in FIG. 21, the outdoor air OA taken into the casing 11 from the outside air intake 21 passes through the bypass passage 16 without passing through the first adsorption heat exchanger 12 and the second adsorption heat exchanger 13. To do. The air supply fan 15 sends the outdoor air OA that has passed through the bypass passage 16 into the room through the air supply port 22 as the supply air SA.

The passage of the second air in the simple ventilation operation is shown in FIG. As shown in FIG. 22, the indoor air RA taken into the casing 11 from the return air port 23 passes through the first adsorption heat exchanger 12 and the second adsorption heat exchanger 13. The exhaust fan 14 discharges the indoor air RA as the exhaust air EA from the exhaust port 24.

(6) Features (6-1)
In the ventilation device 10 according to the present embodiment, the outside air is taken in and flowed into the room as supply air. The ventilation device 10 includes a casing 11, humidity control portions 12 and 13, a bypass passage 16, an opening / closing damper 17, and an air supply fan 15. The casing 11 is formed with an outside air intake port 21 and an air supply port 22. The humidity control units 12 and 13 control the humidity of the outdoor air OA taken into the casing 11 from the outside air intake port 21. The bypass passage 16 guides the outdoor air OA taken into the casing 11 from the outside air intake 21 to the air supply port 22 without passing through the humidity control portions 12 and 13. The opening / closing damper 17 is provided in the bypass passage 16 and opens / closes the bypass passage 16. The air supply fan 15 sends the humidity-controlled outdoor air OA or the outdoor air OA that has passed through the bypass passage 16 into the room through the air supply port 22 as the supply air SA. In the casing 11, a first air passage 31 through which the outdoor air OA passing through the humidity control portions 12 and 13 passes is formed between the humidity control portions 12 and 13 and the air supply port 22. The bypass passage 16 is connected to the first air passage 31. The opening / closing damper 17 is arranged in the bypass passage 16 at a distance of 150 mm or more from the connecting portion D between the bypass passage 16 and the first air passage 31.

In this ventilation device 10, since the opening / closing damper 17 is arranged in the bypass passage 16 at a distance of 150 mm or more from the connecting portion D between the bypass passage 16 and the first air passage 31, the adjustment of the flow through the first air passage 31. It is possible to prevent the outside air passing through the wet portions 12 and 13 from affecting the opening / closing damper 17. Therefore, it is possible to prevent the opening / closing damper 17 from cooling and condensing. The ventilation device 10 is provided with a bypass passage 16 that does not allow the humidity control portions 12 and 13 to pass through, so that the fan power during the ventilation operation can be reduced.

(6-2)
In the ventilation device 10 according to the present embodiment, the air supply fan 15 is arranged in the vicinity of the air supply port 22 of the first air passage 31.

In the ventilation device 10, the air supply fan 15 is arranged at the most downstream of the air flow in which the outside air taken into the casing 11 from the outside air intake port 21 flows through the humidity control portions 12 and 13 to the air supply port 22. In other words, the outside air taken into the casing 11 is pulled by the air supply fan 15. Therefore, it is possible to prevent the outside air from flowing from the first air passage 31 to the bypass passage 16.

(6-3)
In the ventilation device 10 according to the present embodiment, the air supply fan 15 and the bypass passage 16 are arranged so as to sandwich the humidity control portions 12 and 13.

In this ventilation device 10, the air supply fan 15 can be separated from the opening / closing damper 17. Therefore, it is possible to further suppress the outside air from flowing from the first air passage 31 to the bypass passage 16.

(6-4)
In the ventilation device 10 according to the present embodiment, a second air passage 32 through which the outdoor air OA taken into the casing 11 passes is formed in the casing 11 between the outside air intake port 21 and the humidity control portions 12 and 13. Has been done. The first air passage 31 and the second air passage 32 are arranged so as to sandwich the humidity control portions 12 and 13. The bypass passage 16 is connected to the first air passage 31 and the second air passage 32.

The ventilation device 10 is provided with a bypass passage 16 that does not allow the heat exchanger to pass through, so that the fan power during the ventilation operation can be reduced.

(6-5)
The ventilation device 10 according to the present embodiment further includes a control unit 18. The control unit 18 can switch between the first ventilation operation and the second ventilation operation. In the first ventilation operation, the outdoor air OA taken in from the outside air intake port 21 is sent into the room as the supply air SA through the humidity control portions 12 and 13. In the second ventilation operation, the outdoor air OA taken in from the outside air intake port 21 is sent into the room as the supply air SA through the bypass passage 16 without passing through the humidity control portions 12 and 13. The control unit 18 closes the opening / closing damper 17 in the first ventilation operation and opens the opening / closing damper 17 in the second ventilation operation.

In this ventilation device 10, since air can be sent into the room as supply air through the bypass passage 16 without passing through the humidity control portions 12 and 13 during the second ventilation operation, the fan power during the second ventilation operation is reduced. can do.

(6-6)
In the ventilation device 10 according to the present embodiment, the control unit 18 switches between the first ventilation operation and the second ventilation operation based on an instruction from the outside.

In the ventilation device 10, the first ventilation operation and the second ventilation operation can be switched by an external instruction, for example, a user's instruction via a remote controller.

(6-7)
The ventilation device 10 according to the present embodiment further includes a humidity detection unit 64 for detecting the humidity in the room. The control unit 18 switches between the first ventilation operation and the second ventilation operation based on the humidity detected by the humidity detection unit 64.

In the ventilation device 10, the first ventilation operation and the second ventilation operation can be automatically switched based on the humidity detected by the humidity detection unit 64.

(6-8)
In the ventilation device 10 according to the present embodiment, the opening / closing damper 17 is inclined with respect to a plane orthogonal to the direction in which the bypass passage 16 extends.

In the ventilation device 10, the opening area when the opening / closing damper 17 is open can be increased as compared with the case where the opening / closing damper 17 is arranged along the direction orthogonal to the direction in which the bypass passage 16 extends. Therefore, it is possible to reduce the ventilation resistance when the outside air passes through the bypass passage 16, and it is possible to save energy.

(6-9)
In the ventilation device 10 according to the present embodiment, the casing 11 has a return air port 23 that takes in the indoor air RA as return air into the casing 11 and an exhaust port that discharges the indoor air RA as exhaust air EA to the outside of the casing 11. 24, is further formed. The casing 11 is further provided with an exhaust fan 14 that discharges the indoor air RA as the exhaust air EA from the exhaust port 24.

In the ventilation device 10, the indoor air can be discharged to the outside together with the indoor moisture during the dehumidifying operation, and the indoor air can be discharged to the outside without letting the necessary moisture escape during the humidifying operation.

(7) Modification example (7-1) Modification example 1A
In the present embodiment, the case where the humidity control portion of the ventilation device 10 has the first heat exchanger 12 and the second heat exchanger 13 has been described, but the present invention is not limited to this. A large desiccant rotor may be used as the humidity control unit. When a large desiccant rotor is used as the humidity control part, the desiccant adsorbs the moisture in the air, the cooling coil cools the air, the heater warms the air, and the desiccant releases the moisture in the air.

(7-2) Modification 1B
In the present embodiment, the case where the ventilation device 10 performs the dehumidifying operation, the humidifying operation, or the ventilation operation has been described, but the indoor unit and the outdoor unit may be provided, and the heating operation or the cooling operation may be performed together. ..

(7-3) Modification 1C
In the present embodiment, the case where the ventilation device 10 includes the humidity control refrigerant circuit 20 has been described, but the ventilation device 10 may be configured not to include the refrigerant circuit.

(7-4) Modification 1D
In the present embodiment, the ventilation device 10 has described the case where the exhaust fan 14 and the air supply fan 15 are arranged at the most downstream of the air flow, but the positions of the exhaust fan 14 and the air supply fan 15 are not limited to this. Absent.

(7-5) Modification 1E
In the present embodiment, the ventilation device 10 has described the case where the opening / closing damper 17 is inclined with respect to the plane orthogonal to the direction in which the bypass passage 16 extends, but the direction of the opening / closing damper 17 does not have to be inclined. .. For example, the opening / closing damper 17 may be arranged along a plane orthogonal to the direction in which the bypass passage 16 extends.

(7-6) Modification 1F
Although the embodiments of the present disclosure have been described above, it will be understood that various modifications of the forms and details are possible without departing from the purpose and scope of the present disclosure described in the claims. ..

10 Ventilator 11 Casing 12 1st adsorption heat exchanger (humidity control part)
13 Second adsorption heat exchanger (humidity control part)
14 Exhaust fan 15 Air supply fan 16 Bypass passage 17 Open / close damper (open / close member)
18 Control unit 20 Humidity control refrigerant circuit 21 Outside air intake 22 Air supply port 23 Return air port 24 Exhaust port 31 First air passage 32 Second air passage 51 Compressor 52 Four-way switching valve 53 Electric expansion valve 61 Outside air temperature sensor 62 Outside air humidity sensor 63 Indoor temperature sensor 64 Indoor humidity sensor (humidity detector)

JP-A-2009-74786

Claims (9)

It is a ventilation device that takes in outside air and sends it indoors as supply air.
A casing (11) in which an outside air intake (21) and an air supply port (22) are formed, and
Humidity control portions (12, 13) that control the humidity of the outside air taken into the casing from the outside air intake port, and
A bypass passage (16) that guides the outside air taken into the casing from the outside air intake port to the air supply port without passing through the humidity control portion.
An opening / closing member (17) provided in the bypass passage to open / close the bypass passage,
An air supply fan (15) that sends the humidity-controlled outside air or the outside air that has passed through the bypass passage into the room through the air supply port as supply air.
With
In the casing, a first air passage (31) through which the outside air passing through the humidity control portion passes is formed between the humidity control portion and the air supply port.
The bypass passage is connected to the first air passage and is connected to the first air passage.
The opening / closing member is arranged in the bypass passage at a distance of 150 mm or more from the connecting portion between the bypass passage and the first air passage.
Ventilation system. The air supply fan is arranged in the vicinity of the air supply port of the first air passage.
The ventilation device according to claim 1. The air supply fan and the bypass passage are arranged so as to sandwich the humidity control portion.
The ventilation device according to claim 2. In the casing, a second air passage (32) through which the outside air taken into the casing passes is formed between the outside air intake port and the humidity control portion.
The first air passage and the second air passage are arranged so as to sandwich the humidity control portion.
The bypass passage is connected to the first air passage and the second air passage.
The ventilation device according to claim 3. Further equipped with a control unit (18)
The control unit
The first ventilation operation in which the outside air taken in from the outside air intake is sent into the room as air supply through the humidity control unit, and
A second ventilation operation in which the outside air taken in from the outside air intake is sent into the room as supply air through the bypass passage without passing through the humidity control section.
Can be switched,
The control unit closes the opening / closing member in the first ventilation operation and opens the opening / closing member in the second ventilation operation.
The ventilation device according to any one of claims 1 to 4. The control unit switches between the first ventilation operation and the second ventilation operation based on an instruction from the outside.
The ventilation device according to claim 5. Further equipped with a humidity detection unit (64) that detects indoor humidity,
The control unit switches between the first ventilation operation and the second ventilation operation based on the humidity detected by the humidity detection unit.
The ventilation device according to claim 5. The opening / closing member is inclined with respect to a plane orthogonal to the direction in which the bypass passage extends.
The ventilation device according to any one of claims 1 to 7. The casing is further formed with a return air port (23) for taking indoor air into the casing as return air and an exhaust port (24) for discharging indoor air to the outside of the casing as exhaust air.
An exhaust fan (14) that exhausts the indoor air from the exhaust port.
Further prepare,
The ventilation device according to any one of claims 1 to 8.

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