JP2011012932A - Ventilation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance ventilation efficiency, to maintain comfortable air conditioning and to save labor of a facility.SOLUTION: This ventilation system includes: a local ventilating device 2 for supplying conditioned air from an air conditioner 3 via an air supply duct 4 in a predetermined operation mode and discharging indoor air to outside through an air exhaust duct 5; an exhaust device 7; a local ventilation on-off valve 8 provided in the air exhaust duct 5; and a normal air exhaust on-off valve 9 provided in the exhaust device 7. The ventilation system can be optionally switched to a normal operation mode for closing the local ventilation on-off valve 8, opening the normal air exhaust on-off valve 9, blowing out the conditioned air from an air blowout port 22 and discharging indoor air to outside by the exhaust device 7 and a local ventilation mode for opening the local ventilation on-off valve 8, closing the normal air exhaust on-off valve 9 and forming a vortex T toward an air suction port 23 in a lower space of the air suction port 23 by blowing out the conditioned air from the air blowout port 22, at the same time, sucking the indoor air from the air suction port 23 and discharging the indoor air to outside.

Description

  The present invention relates to a ventilation system provided with a mechanism for generating a vortex flow toward an air inlet in order to effectively perform local ventilation.

  Conventionally, a local ventilator that locally ventilates air of a specific source such as heat generated by cooking and heating, contaminated air, cigarette smoke, and the like is known. As this type of ventilator, for example, in Patent Document 1 below, an air supply chamber into which inflow air from an air supply duct is introduced in a swirling direction is provided concentrically inside the air supply chamber. An exhaust chamber that exhausts air through the exhaust chamber, and a recirculation type air passage that is formed between the exhaust chamber and the air supply chamber, and has a long flow path length that allows the air introduced from the air supply duct to flow in a swirling state. A rectifying plate that rectifies the air flow flowing in the swirling state and provided in the lower end side opening surface of the air supply chamber, and circulates air in the swirling direction via the swirling flow generating stator. A ventilator comprising an air outlet that blows out and an air suction port that is provided in an opening surface on the lower end side of the exhaust chamber and sucks air in a predetermined local region in a swirling vortex state in the exhaust chamber is opened. It is.

Japanese Patent No. 3327247

  However, in the conventional ventilation device, since the vortex flow toward the air suction port is formed locally in the central space of the spiral swirl vortex flow fed from the air supply fan, the contaminated air is locally ventilated. When an air conditioner separately provided for air conditioning is in operation, the spiral swirl vortex of the ventilation device interferes with the air flow of the air conditioner, creating convection and hindering the generation of swirl vortex. There was a risk that efficiency would decrease.

  In medical facilities such as hospitals, the number of cases in which local ventilation devices are installed to prevent odors from spreading during procedures such as changing diapers of patients has become an obstacle, but there is an obstacle to eddy current generation in local ventilation devices. When taking measures such as stopping indoor air-conditioning during local ventilation, the temperature of the room changes, which may cause discomfort.

  Further, when such a local ventilation device and an air conditioning device are provided side by side, ducts, piping, and power supply facilities are required for each device, which increases equipment costs.

  Accordingly, a main problem of the present invention is to provide a ventilation system that improves ventilation efficiency, maintains comfortable air conditioning, and saves equipment.

In order to solve the above-mentioned problem, as the present invention according to claim 1, an air supply chamber to which conditioned air from an air conditioner is supplied through an air supply duct, and a substantially same circulation direction provided around the lower edge side of the air supply chamber A local ventilator comprising an air outlet that blows air obliquely downward and an air inlet provided in the central portion of the air supply chamber and exhausts room air to the outside through an exhaust duct; A ventilation system comprising: an exhaust device for exhausting the exhaust gas; a local ventilation on-off valve provided in the exhaust duct; and a normal exhaust on-off valve provided in the exhaust device,
A normal operation mode in which the local ventilation on-off valve is closed, the normal exhaust on-off valve is open, the conditioned air is blown out from the air outlet, and indoor air is exhausted to the outside by the exhaust device;
By opening the local ventilation on-off valve, closing the normal exhaust on-off valve, and blowing out the conditioned air from the air outlet and sucking indoor air from the air inlet and exhausting it to the outside The ventilation system is characterized in that it can be arbitrarily switched to a local ventilation mode in which a vortex flow toward the air suction port is formed in the space below the air suction port.

  The invention described in claim 1 is a first embodiment of the ventilation system according to the present invention. In the normal operation mode, the conditioned air of the air conditioner is supplied indoors by the local ventilation device, and the indoor air is supplied by the exhaust device. General indoor air conditioning and ventilation exhausted to the outside is performed, and in the local ventilation mode, conditioned air is similarly supplied into the room by the local ventilation device, and instead of exhausting by the exhaust device, the local ventilation device Ventilation is performed in which room air is sucked from the air inlet and exhausted to the outside. In the local ventilation mode, the conditioned air is blown out from the air outlet and at the same time the room air is sucked in from the air inlet, thereby generating a continuous vortex toward the air inlet. Thus, in the ventilation system according to the present invention, the conditioned air from the air conditioner is used as the air blown from the air outlet, so there is no need to separately perform indoor air conditioning by the air conditioner, and the swirl flow of the local ventilation device There is no possibility that the generation of eddy currents will interfere with the ventilation efficiency due to interference between the air flow and the air flow of the air conditioner.

  Moreover, since the supply of conditioned air from the air conditioner is continuously performed even in the local ventilation mode, the temperature change in the room is suppressed, and uncomfortable feeling does not occur. Furthermore, since the conditioned air of the air conditioner is used as the supply air for the local ventilation device, it is possible to save labor in ducts, piping, and power supply equipment.

As a second aspect of the present invention, an air supply chamber to which conditioned air is supplied from an air conditioner through an air supply duct, and an air that is provided around the lower edge of the air supply chamber and obliquely downward in the same circumferential direction. A local ventilator that is provided at the center of the air supply chamber and exhausts room air to the outside through an exhaust duct, and a supply air that supplies conditioned air from the air conditioner. A ventilation system comprising an air device, an on-off valve for local ventilation provided in the air supply duct, and an on-off valve for normal air supply provided in the air supply device,
Normal operation in which the on-off valve for local ventilation is closed, the on-off valve for normal air supply is opened, the conditioned air is blown out from the air supply device, and indoor air is sucked from the air intake port and exhausted to the outside Mode,
Opening the local ventilation on-off valve, closing the normal air supply on-off valve, and blowing out the conditioned air from the air outlet and simultaneously sucking indoor air from the air inlet and exhausting it to the outside Thus, a ventilation system is provided that can be arbitrarily switched to a local ventilation mode that forms a vortex flow toward the air suction port in the space below the air suction port.

  The invention described in claim 2 is a second embodiment of the ventilation system according to the present invention. The second embodiment is different from the ventilation system according to the first embodiment in the supply and exhaust flow path configurations. That is, in the normal operation mode, the conditioned air of the air conditioner is supplied into the room by the air supply device, and the room air is exhausted to the outside by the local ventilation device, while in the local ventilation mode, the air supply is replaced with the air supply by the air supply device. Thus, conditioned air from the air conditioner is supplied into the room by the local ventilation device, and ventilation is performed in which room air is sucked from the air suction port of the local ventilation device and exhausted to the outside.

  As described above, according to the present invention, it is possible to provide a ventilation system that improves ventilation efficiency, maintains comfortable air conditioning, and saves equipment.

1 is an external view of a room in which a ventilation system 1 according to the present invention is arranged. It is a channel lineblock diagram of the normal operation mode by ventilation system 1A concerning the 1st form example. It is a channel lineblock diagram of local ventilation mode by ventilation system 1A concerning the 1st form example. It is a channel block diagram of the normal operation mode by the ventilation system 1B which concerns on a 2nd form example. It is a channel lineblock diagram of local ventilation mode by ventilation system 1B concerning the 2nd form example. 3 is a top view of the local ventilation device 2. FIG. It is the VII-VII arrow line view. 3 is a bottom view of the local ventilation device 2. FIG. It is a side view of the local ventilation apparatus 2. FIG. It is an enlarged view of the air outlet 22 part. FIG. 5 is a schematic diagram showing a flow of air supplied from an air supply guide.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. For example, as shown in FIG. 1, a ventilation system 1 according to the present invention is provided with a local ventilation device 2 above each bed in a hospital room in a medical facility such as a hospital, and performs treatment such as changing a patient's diaper on the bed. While performing, the swirl flow N is blown out from the local ventilation device 2 corresponding to the bed, and at the same time, the indoor air is sucked to form a vortex T toward the local ventilation device 2 in the space below the local ventilation device 2, This is for individual local ventilation so that odors do not diffuse into the room. On the other hand, the present ventilation system 1 can be similarly used for ventilation of heat and polluted air generated when using a cooking / heating apparatus conventionally used, and for exhausting cigarette smoke.

[Ventilation system 1A according to the first embodiment]
The ventilation system 1A will be described in detail with reference to FIGS. 2 and 3 are flow path configuration diagrams in which one local ventilation device 2 is extracted from a plurality of local ventilation devices 2 provided in the target room as shown in FIG.

  As shown in FIGS. 2 and 3, the ventilation system 1 </ b> A supplies conditioned air from the air conditioner 3 through the air supply duct 4 and exhausts room air to the outside through the exhaust duct 5 in a predetermined operation mode. Local ventilation device 2, exhaust device 7 that exhausts indoor air to the outside through exhaust duct 6, local ventilation on / off valve 8 provided in exhaust duct 5 of local ventilation device 2, and exhaust duct 6 of exhaust device 7 This is mainly composed of a normal exhaust opening / closing valve 9 provided in the exhaust duct 10, an exhaust fan 10 provided downstream of the exhaust ducts 5, 6, and a filter 11 provided upstream of the exhaust fan 10. In the illustrated example, the exhaust ducts 5 and 6 are joined together at the subsequent stage of the on-off valves 8 and 9, and the exhaust fan 10 and the filter 11 are provided in the joined exhaust duct portion.

  The local ventilation device 2 is provided around the lower edge side of the air supply chamber 21 to which conditioned air from the air conditioner 3 is supplied through the air supply duct 4, and is directed obliquely downward in the same circumferential direction. The air outlet 22 for blowing out air and the air inlet 23 provided at the center of the air supply chamber 21 and exhausting the room air to the outside through the exhaust duct 5 are mainly configured. The local ventilation device 2 will be described in detail later.

  In the operation of the ventilation system 1A, as shown in FIG. 2, the local ventilation on-off valve 8 is closed, the normal exhaust on-off valve 9 is opened, and the conditioned air is blown out from the air outlet 22. The normal operation mode in which room air is exhausted to the outside by the exhaust device 7, and the local ventilation on-off valve 8 is opened and the normal exhaust on-off valve 9 is closed as shown in FIG. At the same time as blowing out from the air outlet 22, the room air is sucked in from the air inlet 23 and exhausted to the outside, so that a local ventilation mode that forms a vortex toward the air inlet 23 in the space below the air inlet 23 is optional. It is possible to switch to. The switching of the operation mode is performed at an arbitrary timing by switching the open / close state of the local ventilation on / off valve 8 and the normal exhaust on / off valve 9 by a switch not shown.

  In the normal operation mode, the conditioned air of the air conditioner 3 is supplied into the room by the local ventilation device 2 and the room air is exhausted to the outside by the exhaust device 7, so that general indoor air conditioning and ventilation are performed.

  On the other hand, in the local ventilation mode, exhaust by the exhaust device 7 is stopped, and ventilation is performed in which room air is sucked from the air suction port 23 of the local ventilator 2 and exhausted to the outside. In this manner, in the local ventilation device 2, the conditioned air is blown out from the air outlet 22, and at the same time, the room air is sucked out from the air inlet 23 and exhausted to the outside. The swirling flow N is generated by the air blown from the blowout port 22 to generate centrifugal force, and the suction from the air suction port 23 causes a negative pressure at the center of the swirling flow N in the space below the air suction port 23. Is formed, and a continuous vortex T is generated toward the air inlet 23. For this reason, local ventilation comes to be performed efficiently in the lower space of the local ventilation apparatus 2.

  As described above, in this ventilation system, the conditioned air from the air conditioner 3 is used as the air blown from the air outlet 22, so there is no need to separately perform indoor air conditioning by the air conditioner. The interference with the supply airflow also obstructs the generation of the vortex T and eliminates the possibility that the ventilation efficiency decreases. Moreover, since the supply of conditioned air from the air conditioner 3 is continuously performed even in the local ventilation mode, the temperature change in the room is suppressed, and uncomfortable feeling does not occur. Furthermore, since the conditioned air of the air conditioner 3 is used as the supply air for the local ventilation device 2, the labor of ducts, piping, and power supply equipment can be saved.

[Ventilation system 1B according to the second embodiment]
The ventilation system 1B according to the second embodiment is different from the ventilation system 1A according to the first embodiment in the air supply and exhaust flow path configurations. Specifically, as shown in FIGS. 4 and 5, the local ventilation device 2, the air supply device 12 that supplies conditioned air from the air conditioner 3 into the room through the air supply duct 13, and the local ventilation device. The local ventilation open / close valve 14 provided in the second air supply duct 4, the normal air supply open / close valve 15 provided in the air supply duct 13 of the air supply device 12, and the exhaust gas provided downstream of the exhaust duct 5. The main component is a fan 10 and a filter 11.

  In the operation of the ventilation system 1B, as shown in FIG. 4, the local ventilation on-off valve 14 is closed, the normal air supply on-off valve 15 is opened, and the conditioned air is blown out from the air supply device 12. The normal operation mode for sucking room air from the air inlet 23 and exhausting it outside, and as shown in FIG. 5, the local ventilation on-off valve 14 is opened, the normal air supply on-off valve 15 is closed, The conditioned air is blown out from the air outlet 22 and at the same time, can be arbitrarily switched to a local ventilation mode that forms a vortex in the space below the air inlet 23 toward the air inlet 23.

  In this embodiment, conditioned air is supplied indoors from the air supply device 12 in the normal operation mode, so that comfortable air conditioning is possible.

[Local ventilation device 2]
Next, the local ventilation device 2 will be described in detail with reference to FIGS.

  As shown in FIGS. 6 to 9, the local ventilation device 2 has an air supply chamber in which the conditioned air of the air conditioner 3 is supplied in a circumferential direction through an air supply duct 4 connected from a substantially cylindrical outer peripheral portion tangential direction. And a slit-like air outlet 22 that substantially circulates around the lower edge side of the casing 30 and an air inlet 23 that is a circular opening at the center thereof. A disc-shaped lower plate 31, a mesh-shaped net cover 32 that covers the air suction port 23 formed at the center of the lower plate 31, and a central portion of the air supply chamber 21, and the exhaust duct 5 and is mainly composed of a partition wall 33 that divides indoor air sucked from the air suction port 23 and air in the air supply chamber 21. In the illustrated example, the local ventilation device 2 is of a ceiling-embedded type, and therefore, a face plate 30a is provided that extends outward from the outer edge of the lower end of the casing 30 and covers the gap with the ceiling material.

  As shown in FIG. 10, the air outlet 22 has the lower plate 31 attached to the casing 30 so as to form a slit-like gap between the inner edge of the lower end portion of the casing 30 and the outer peripheral edge of the lower plate 31. It is provided by being attached. In the illustrated example, the lower plate 31 is fixed at four locations in the circumferential direction by mounting brackets 34, 34... Bent in an L shape from the lower end inner edge of the casing 30.

  Here, as shown in FIG. 10, the lower plate 31 is fixed to a position slightly above the lower end edge of the casing 30, so that the outer circumference of the air outlet 22 and the air inlet 23 is A step is provided in which the lower end of the casing 30 protrudes downward. Thereby, the spreading | diffusion of the blowing flow from the air blower outlet 22 and the suction flow to the air suction inlet 23 can be suppressed.

  On the other hand, a partition plate 35 and a plurality of air supply guides 36, 36 are provided in the air supply chamber 21 so that the conditioned air from the air outlet 22 becomes a blowout flow directed obliquely downward in substantially the same circumferential direction. ... are arranged. Specifically, as shown in FIG. 11, the inside of the air supply chamber 21 is vertically divided into a region where air is supplied from the air supply duct 4 by the partition plate 35 and a region where air is blown out by the air outlet 22. In the region where air is supplied, an air supply guide 36 having an opening in the same circulation direction of the supplied air and continuously forming a flow path obliquely downward is provided. Yes. Then, by providing a through-hole in the partition plate 35 at the front end of the flow path of the air supply guide 36, air directed obliquely downward in substantially the same circumferential direction is blown out from the air outlet 22. ing.

[Other examples]
(1) In the above embodiment, the air outlets 22 are provided in the form of slits around the lower edge of the air supply chamber 21. However, a plurality of outlet nozzles may be arranged at intervals in the circumferential direction. Good.

  1 · 1A · 1B ... Ventilation system, 2 ... Local ventilation device, 3 ... Air conditioner, 4 ... Air supply duct, 5 · 6 ... Exhaust duct, 7 ... Exhaust device, 8 ... Open / close valve for local ventilation, 9 ... Normal exhaust Open / close valve, 10 ... exhaust fan, 11 ... filter, 21 ... air supply chamber, 22 ... air outlet, 23 ... air inlet, 30 ... casing, 31 ... lower plate, 32 ... net cover, 33 ... partition, 34 ... Mounting bracket, 35 ... Partition plate, 36 ... Air supply guide

Claims (2)

An air supply chamber to which conditioned air from an air conditioner is supplied through an air supply duct, an air outlet provided around the lower edge of the air supply chamber and for blowing air toward an obliquely downward direction in substantially the same circumferential direction; A local ventilation device that is provided at the center of the air chamber and includes an air suction port that exhausts indoor air to the outside through an exhaust duct; an exhaust device that exhausts indoor air to the outside; and a local ventilation device provided in the exhaust duct. A ventilation system comprising an on-off valve and a normal exhaust on-off valve provided in the exhaust device,
A normal operation mode in which the on-off valve for local ventilation is closed, the on-off valve for normal exhaust is opened, the conditioned air is blown out from the air outlet, and indoor air is exhausted to the outside by the exhaust device;
By opening the local ventilation on-off valve, closing the normal exhaust on-off valve, and blowing out the conditioned air from the air outlet and sucking indoor air from the air inlet and exhausting it to the outside A ventilation system characterized in that it can be arbitrarily switched to a local ventilation mode in which a vortex flow toward the air inlet is formed in the space below the air inlet. An air supply chamber to which conditioned air from an air conditioner is supplied through an air supply duct; an air outlet provided around the lower edge of the air supply chamber and for blowing air downward in a substantially same circumferential direction; A local ventilation device that is provided at the center of the air chamber and includes an air suction port that exhausts indoor air to the outside through an exhaust duct; an air supply device that supplies conditioned air from the air conditioner; and the air supply duct. A ventilation system comprising a local ventilation on-off valve provided and a normal air supply on-off valve provided in the air supply device;
Normal operation in which the on-off valve for local ventilation is closed, the on-off valve for normal air supply is opened, the conditioned air is blown out from the air supply device, and indoor air is sucked from the air intake port and exhausted to the outside Mode,
Opening the local ventilation on-off valve, closing the normal air supply on-off valve, and blowing out the conditioned air from the air outlet and simultaneously sucking indoor air from the air inlet and exhausting it to the outside Thus, the ventilation system can be arbitrarily switched to a local ventilation mode in which a vortex flow toward the air suction port is formed in the space below the air suction port.

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