JP2001349589A - Supply and exhaust ventilation system - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To secure comfort on the floor side in an air supply / exhaust ventilation system. A and air supply means X for blowing supply air A ₃ to the air curtain, the air supply A blown into the air curtain
_And an exhaust means Y for sucking and discharging the air inside ₃ , the indoor air A ₂ near the ceiling 41 or the external air A ₁ , or the indoor air A ₂ and the external air A as the air supply A _{3. Use} mixed air with ₁ . With such a configuration, for example, the ceiling 4 in the case of using the room air A ₂ as the supply air A ₃
1 warm near air improves thermal comfort of the floor surface by being returned to the floor surface side, the cleaning of the interior space 40 is at an early stage in the case of using the outside air A ₁ as the supply air A ₃ It is achieved, when using a mixed air of room air a ₂ and the outside air a ₁ as the supply air a ₃ includes a thermal comfort and indoor air cleaning promoting the floor surface is achieved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a supply / exhaust ventilation system for performing local supply / exhaust ventilation.

[0002]

2. Description of the Related Art FIG. 3 shows, for example, an environment in which a plurality of tables 55, 55,... 1 shows a conventional general ventilation device used in the above. This ventilation device is provided for each of the cooking devices 56, 56,.
.. and the air supply / exhaust hoods 51, 5
Are connected to an exhaust duct 53 disposed above the ceiling 63 via an exhaust pipe 52, and contain relatively high temperature and oil generated from the cooking devices 56, 56,. The indoor air is ventilated by sucking the oil fumes by the exhaust fan 54 and discharging the exhausted smoke from the exhaust outlet 53a of the exhaust duct 53 to the outside of the chamber wall 64.

[0003] Usually, on the lower surface side of the ceiling 63,
The air conditioner indoor units 60, 60,.
The indoor temperature is adjusted by the conditioned air blown from the outlets 61 of the indoor unit 60.

[0004]

However, such a conventional ventilator (including a ventilator provided with an air conditioner) has the following problems.

[0005] First, there is a problem that the comfort is deteriorated due to the deviation of the temperature distribution of the room temperature in the vertical direction. That is, due to the specific gravity difference between the indoor air, the warm air is concentrated on the ceiling 63 side and the cool air is concentrated on the floor side, so that the temperature on the floor side which is a living area at the time of heating request in winter season. Low comfort. In particular, when the cooker 56 is arranged on the floor side such as a yakiniku restaurant, and when heat is generated on the floor side much, high temperature oil smoke generated from the cooker 56 side is collected on the supply / exhaust hood 51 side. Even if smoke is discharged, the above-mentioned problem becomes even more remarkable since the air temperature rises due to heat radiation from the cooking device 56.

The second problem is a problem particularly when the indoor unit 60 of the air conditioner is installed on the ceiling 63 side. That is,
When the indoor unit 60 is installed on the ceiling 63 side, it is necessary to suppress the feeling of draft on the floor surface side due to the conditioned air blown out from the outlet 61, and the cooking by the airflow of the conditioned air. When the flow of the oil smoke generated from the heater 56 side and sucked into the air supply / exhaust hood 51 side is disturbed, part of the oil smoke is diffused to the upper part of the room without being sucked into the air supply / exhaust hood 51 side, and the indoor air is contaminated. It is necessary to prevent this.

As one method of realizing these requirements, for example, as shown in FIG.
The blowout direction of the conditioned air blown out from is set to a substantially horizontal direction, thereby suppressing the feeling of draft on the floor surface side and preventing the airflow of the conditioned air from adversely affecting the suction and discharge operation of the oil smoke. There is a way. However, when the blowing direction of the conditioned air is set to be substantially horizontal as described above, the uneven distribution of warm air to the ceiling side is further increased by the conditioned air, particularly during the heating operation in winter, and the floor is viewed as a whole. This is not a good idea because the comfort on the surface side is greatly impaired.

Accordingly, the present invention has been made mainly for the purpose of ensuring comfort on the floor side in an air supply / exhaust ventilation system.

[0009]

Means for Solving the Problems In the present invention, the following configuration is adopted as specific means for solving such problems.

[0010] In the first invention of the present application, a supply means X for blowing supply air A ₃ so as to surround a predetermined localized ventilation area S of the indoor space 40 to the air curtain, the air supply means X An exhaust means Y for sucking air in the ventilation area S inside the air supply A ₃ blown out in the form of an air curtain and discharging the air as exhaust A ₄ to the outside of the room; As the air supply A ₃ , the indoor air A ₂ near the ceiling 41 of the indoor space 40, the outdoor air A ₁ from outside, or the mixed air of the indoor air A ₂ and the outdoor air A _1. It is characterized by having.

In the second aspect of the present invention, an air supply means X for blowing out an air supply A ₃ in the form of an air curtain so as to surround a predetermined local ventilation area S in the indoor space 40, and An exhaust means Y for sucking air in the ventilation area S inside the air supply A ₃ blown out in the form of an air curtain and discharging the air as exhaust A ₄ to the outside of the room; As the air supply A ₃ , the indoor air A ₂ near the ceiling 41 of the indoor space 40, the outdoor air A ₁ from outside, and the mixed air of the indoor air A ₂ and the outdoor air A ₁ It is characterized in that it is configured to be selected and used according to ventilation requirements.

In a third aspect of the present invention, the first or second aspect
In the supply and exhaust ventilation system according to the present invention, the air supply means X, is characterized by being configured to blow the air curtain it by applying a swirl component to the air supply A ₃ as swirling flow.

[0013] In a fourth aspect of the present invention, the first, the second or the supply and exhaust ventilation system according to the third invention, room for introducing room air A ₂ near the ceiling 41 as the supply air A ₃ It is characterized in that a plurality of air inlets 7 are arranged in a distributed manner in the surface direction of the ceiling 41.

In the fifth invention of the present application, the first, second, and
In the supply / exhaust ventilation system according to the third or fourth invention, the indoor unit 25 of the air conditioner is arranged on the ceiling 41 side, and the blowout direction of the conditioned air in the indoor unit 25 is set to be substantially horizontal. It is characterized by.

[0015]

According to the present invention, the following effects can be obtained by adopting such a configuration.

(1) In the air supply / exhaust ventilation system according to the first invention of the present application, air supply means for blowing out the air supply A ₃ in the form of an air curtain so as to surround a predetermined local ventilation area S in the room space 40. and X, supply and exhaust having an exhaust means Y for discharging to the outside in the inside of the supply air a ₃ blown from the air supply means X to an air curtain as air suction exhaust a ₄ in the ventilation area S In the ventilation system, the air supply means X is used as the air supply A ₃ , the room air A ₂ near the ceiling 41 of the room space 40, or the outside air A ₁ from the outside,
Or it has a configuration in which a mixed air of the indoor air A ₂ and the outside air A _1.

Therefore, according to the supply / exhaust ventilation system according to the first invention, the following effects can be obtained.

(1-a) As the air supply A ₃ , the ceiling 4
When the indoor air A ₂ in the vicinity of 1 employs the structure for blowing the air curtain in the ventilation region S, the ventilation area S
Together with the discharge from being sucked by the exhaust means Y is efficiently performed with the air that has been shielded from its surroundings by supply air A ₃ to be blown into the air curtain of the inner, warm the vicinity of the ceiling 41 The air is recirculated to the floor side to increase the air temperature on the floor side,
In particular, at the time of a heating request in winter, the thermal comfort on the floor side is improved, and air supply / exhaust ventilation that achieves both comfort and ventilation in the indoor space 40 is achieved. Therefore, for example, it can be said that it is a suitable ventilation form when it is required to perform ventilation without lowering the room temperature.

(1-b) Supply air A_ThreeAs from outside
Outside air A₁Into the ventilation area S in the form of an air curtain.
When the configuration is adopted, the air in the ventilation area S is exhausted.
Air supply A blown out in the form of an curtain_ThreeBy its surroundings
Sucked by the exhaust means Y while being shielded from
As a result, the gas is discharged efficiently and the air supply A
_ThreeOutside air A as₁Of the indoor space 40 by introducing the
Ventilation is promoted. Therefore, for example, the indoor space 40
High degree of pollution and need to recover the indoor environment early by ventilation
It can be said that it is a suitable ventilation form when required.

[0020] As (1-c) supply A _3, when a mixed air of the indoor air A ₂ and the outside air A ₁ adopts the structure for blowing the air curtain in the ventilation region S, the ventilation area S The air inside the air supply A is blown out like an air curtain.
_The air is sucked by the exhaust means Y in a state of being shielded from the surroundings by ₃ so that the exhaust is efficiently performed, and the air supply A ₃ is a mixed air of the room air A ₂ and the outside air A _1. since there, the thermal comfort of the floor surface side warm air in the vicinity above the ceiling 41 by the reflux to the floor side, a cleaning promoting indoor air by the introduction of the outside air a ₁ is achieved at the same time. Therefore, for example, it can be said that this is a suitable ventilation form in a case where it is required to perform indoor ventilation without significantly lowering the indoor temperature.

[0021] (2) According to the supply and exhaust ventilation system according to the second aspect of the invention, blowing the supply air A ₃ so as to surround a predetermined localized ventilation area S of the indoor space 40 in the air curtain sheet An air supply means X, and an exhaust means Y for sucking air in the ventilation area S inside the air supply A ₃ blown out in an air curtain form from the air supply means X and discharging the air to the outside as exhaust air A ₄ . In the air supply / exhaust ventilation system, the air supply means X is used as the air supply A ₃ , the indoor air A ₂ near the ceiling 41 of the indoor space 40, the outdoor air A ₁ from outside,
A mixed air of the indoor air A ₂ and the outside air A _1, since a configuration selected and used depending on the room ventilation requirements, for example, an indoor space 40 has not been much contaminated, with emphasis on thermal comfort If ventilation is required, room air A ₂
Alternatively room air A ₂ and the outside air A ₁ supply the mixed air with the A ₃
Be used as well, also the outside air A ₁ or indoor air A ₂ and the outside air A ₁ supply the mixed air with the A ₃ in the case such as premature improving indoor environment has progressed contamination of the indoor space 40 is required For example, it is possible to easily realize a more appropriate ventilation form corresponding to the ventilation requirement of the room 40.

(3) According to the supply / exhaust ventilation system according to the third aspect of the present invention, the following specific effects can be obtained in addition to the effects described above or above. That is, in this invention, the supply and exhaust ventilation system according to the first or second aspect of the invention, the air supply means X, the air curtain it by applying a swirl component to the air supply A ₃ as swirling flow Since it is configured to blow out, when the exhaust means Y sucks and discharges the exhaust A ₄ inside the air supply A ₃ ,
The exhaust A ₄ becomes a tornado flow in which a swirl component is given by contact with the supply air A ₃ which is a swirl flow and swirls upward, and is more smoothly discharged by the strong suction action of the tornado flow. The ventilation action in the ventilation area S is further promoted.

(4) According to the supply / exhaust ventilation system according to the fourth aspect of the present invention, the following specific effects can be obtained in addition to the effects described above or above. That is, in the present invention, a plurality of indoor air inlets 7 for introducing the indoor air A ₂ near the ceiling 41 as the air supply A ₃ are dispersed and arranged in the surface direction of the ceiling 41, The improvement of the temperature distribution in the vertical direction is performed substantially uniformly over a wide range of the indoor space 40, and the comfort by ventilation of the indoor space 40 is further promoted.

(5) According to the supply / exhaust ventilation system according to the fifth aspect of the present invention, the following specific effects can be obtained in addition to the effects described in the above or the above. That is,
In the present invention, the indoor unit 2 of the air conditioner is provided on the ceiling 41 side.
5 and the blowing direction of the conditioned air in the indoor unit 25 is set to be substantially horizontal, so that the occurrence of a draft feeling on the floor surface side due to the conditioned air is prevented as much as possible. Since the air around the ventilation area S is prevented from being disturbed by the airflow of the conditioned air as much as possible, the ventilation action by the cooperation of the air supply means X and the exhaust means Y is maintained at a high level. As a synergistic effect of these, the indoor space 4
The comfort at zero will be further promoted.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A supply / exhaust ventilation system according to the present invention will be specifically described below based on a preferred embodiment.

A: Configuration of Supply / Exhaust Ventilation System FIG. 1 shows the overall configuration of a supply / exhaust ventilation system according to an embodiment of the present invention. The air supply / exhaust ventilation system includes, for example, cookers 32, 32,... Such as stoves, seven-wheels, etc., at tables 31, 31,. For each of the tables 31, 3
Each of the cooking devices 3 is locally ventilated in an upper space (hereinafter, referred to as a “ventilation region S”) of each of the cookers 3.
2, 32,... While venting the indoor space 40 while discharging the oil smoke generated from the part to the outside of the room,
The air supply / exhaust hoods 1, 1,... Arranged above the ventilation areas S, S,.

As shown in FIG. 2, the air supply / exhaust hood 1 has a substantially dome shape and has a first hood 11 arranged with its opening side downward, and an upper outer side of the first hood 11. And a second hood 12 disposed in a superposed state on the first hood 11 and the second hood 12.
An air supply chamber 13 having a predetermined volume and having a lower end opening obliquely downward along the outer peripheral surface of the first hood 11 is provided between the hoods 12.

The first hood 11 and the second hood 12 are respectively disposed through the axial center of the air supply / exhaust hood 1 and the lower end 2 a of the first hood 11 is connected to the first hood 1.
An exhaust pipe 2 opened inside 1 is attached.
The lower end 2a of the exhaust pipe 2 serves as an exhaust suction port 14 for sucking air in the ventilation area S.

Further, the second hood 12 penetrates a peripheral wall of the second hood 12 and has an open end 3a thereof.
It is attached in a state facing 3. in this case,
The open end 3a of the air supply pipe 3 is connected to the air supply chamber 13
On the other hand, the mounting direction is set so as to be directed obliquely downward in the up-down direction and in a direction substantially matching the tangential direction of the peripheral wall in the plane direction.

Accordingly, the air supply A ₃ supplied into the air supply chamber 13 through the air supply pipe 3 by the air supply fan 22 (described later) flows from the entire circumference of the air supply outlet 15 in a swirling state. blown out like a curtain, the ventilation area S is a state of being surrounded by the flow of the supply air a _3. On the other hand, the air in the ventilation area S surrounded by the flow of the air curtain-shaped supply air A ₃ (hereinafter, referred to as “exhaust A ₄ ”) is subjected to the suction action of the exhaust fan 21 (described later). Then, the air is sucked from the exhaust suction port 14 to the exhaust pipe 2 side. In this case, since the flow of the air supply A ₃ surrounding the outside is a swirling flow, contact with the air supply A ₃ is made. And a swirl component is given to the exhaust air suction port 14 as a tornado flow which swirls upward. As a result, local exhaust (that is, ventilation) for the ventilation area S is realized.

On the other hand, on the upper surface side of the ceiling 41 of the indoor space 40 (that is, the space behind the ceiling), the exhaust duct 4, the air supply duct 5, and the indoor air duct 6 are arranged respectively.

The exhaust duct 4 has an exhaust outlet 8 provided at one end of the exhaust duct 4, which is opened through the chamber wall 42 of the indoor space 40 to the outside. The exhaust pipes 2, 2, extending from
・ ・ The upper end is connected. In addition, the exhaust outlet 8
, An exhaust fan 21 is internally provided. Therefore, with the operation of the exhaust fan 21, a suction action acts on each of the exhaust pipes 2, 2,..., And due to this suction action, the exhaust air A in each of the ventilation areas S, S,. _The suction pipe ₄ is sucked into the exhaust pipes 2, 2,... And discharged through the exhaust duct 4 from the exhaust outlet 8 to the lacquer.

The air supply duct 5 has an outside air suction port 9 provided at one end of the air supply duct 5, which is opened through the chamber wall 42 to the outside.
The upper ends of the air supply pipes 3, 3,... Extending from 1,. The air supply duct 5 has an air supply fan 22 internally provided in the vicinity of the outside air suction port 9, and an indoor air duct at an intermediate position between the air supply fan 22 and the outside air suction port 9. 6 is connected to one end.

Further, a first damper 23 is provided at an intermediate position between the connection point of the air supply duct 5 with the room air duct 6 and the outside air suction port 9, and the air supply duct 5 of the room air duct 6 is provided. The second dampers 24 are respectively arranged on the upstream side of the connection site with the second damper. The indoor air duct 6 has indoor air inlets 7, 7,... At a plurality of locations corresponding to intermediate positions of the tables 31, 31,. , 7,... Penetrate the ceiling 41 and face the indoor space 40.

The first damper 23 variably adjusts the passage area of the exhaust duct 4, and the second damper 24 variably adjusts the passage area of the indoor air duct 6. The adjustment is performed, for example, by an arbitrary opening adjustment method in which the opening is appropriately set at the time of the installation work of the air supply / exhaust ventilation system and the opening is individually adjusted as needed after the fact, or the ventilation of the indoor space 40. Automatically (eg, a room temperature sensor or CO2) in response to a request (eg, in response to a request for ventilation while maintaining the room temperature, or an early ventilation request in which room cleaning is prioritized over room temperature fluctuations).
_It is performed by an automatic opening adjustment method that performs opening adjustment based on the output of _two sensors or the like.

On the other hand, on the lower surface side of the ceiling 41 of the indoor space 40, a plurality of indoor units 25 of the air conditioner are installed appropriately separated in the plane direction. Each of these indoor units 2
5, 25, ... are all four-way blowout indoor units,
In this embodiment, each outlet 2 of the indoor unit 25
The air-conditioning air blown out from 6, 26,
It is set to be substantially horizontal for both heating and cooling. In this embodiment, each of the indoor units 25, 2
Are installed at positions corresponding to intermediate positions of the tables 31, 31,..., And among the air outlets 26, 26,. The air outlet 26 directed to the side closes the air outlet, and the conditioned air is blown out only from the other three air outlets 26, 26, 26.

In this embodiment, the air supply duct 5, the indoor air duct 6, and the air supply pipes 3, 3,.
And the air supply fan 22 constitutes “air supply means X” in the claims. The exhaust duct 4, the exhaust pipes 2,... And the exhaust fan 21 define the “air supply means X” in the claims. Exhaust means Y "is configured.

B: Operation of Supply / Exhaust Ventilation System, etc. Next, the operation of the supply / exhaust ventilation system configured as described above will be described for each of the first to third ventilation modes.

The first ventilation mode means that the first damper 23 provided in the air supply duct 5 and the second damper 24 provided in the room air duct 6 are each set to an appropriate opening degree. is, the mixing air with outside air a ₁ and each of the indoor air inlet 7, 7 of the ceiling 41 near introduced from ... indoor air a ₂ that is introduced from the outside air inlet port 9 as the supply air a ₃ This refers to a ventilation mode supplied to the air supply / exhaust hood 1 side.

The second ventilation mode refers to the first damper 2.
3 and the second damper 24, the second damper 24
Only open and the first damper 23 is closed, the supply and exhaust hoods 1 only room air A ₂ of the ceiling 41 near the air supply A ₃
The ventilation type supplied to the side.

The third ventilation mode refers to the first damper 2.
3 and the second damper 24, the first damper 23
Only open and the second damper 24 is closed, means a ventilation mode in which only outdoor air A ₁ is supplied to the air supply and exhaust hood 1 side as the supply air A _3.

B-1: In the first ventilation mode such as the operation in the first ventilation mode, the outside air A ₁ and the room air A ₂ are separated from the first damper 23 by the operation of the air supply fan 22. and it is introduced into the air supply duct 5 side at a rate corresponding to the opening ratio of the second damper 24, each supply pipe 3, 3 as a mixed air supply a _3, through ... each sheet exhaust hood 1,1 is supplied to ..., it is blown into the air curtain as swirl flow from the air supply outlet 15 of the fed-exhaust hood 1, each of the ventilation area S by the flow of the supply air a _3, S , ... is enclosed. At the same time, with the operation of the exhaust fan 21, a suction force acts on the exhaust suction ports 14 of the supply / exhaust hoods 1, 1,. under the force, it is sucked from the exhaust inlet 14 at elevated tornado flow state as the exhaust a _4, is discharged outdoors from the exhaust outlet 8 of the air supply duct 5. Accordingly, in each of the ventilation areas S, S,..., The oil smoke generated in the cooking device 32 is efficiently discharged, and the room air A ₂ and the air supply A ₃ are supplied from around the ventilation area S. Is supplied to the ventilation area S side, a local ventilation action in the ventilation area S is realized, and the indoor space 40 is cleaned.

On the other hand, the vicinity of the ceiling 41 of the indoor space 40 is heated by the heat radiated from the cooking devices 32, 32,... And during the heating operation, the indoor units 25, 25,.・ ・ Warm air-conditioning air blown horizontally (in other words, along the ceiling surface) from the air accumulates warm air, causing a large deviation in the temperature distribution in the vertical direction of the indoor space 40, and particularly the heating operation As described above, the comfort may sometimes be impaired due to the low temperature near the floor.

However, in this embodiment, warm indoor air A ₂ near the ceiling 41 is used as part of the air supply A ₃ blown downward from the air supply / exhaust hoods 1, 1,... since the way capture, (see dashed flow lines a ₅ in Fig. 1) indoor circulation acts in the vertical direction of the air a ₂ is generated in the interior space 40, the room temperature at the floor surface near the (air temperature) And the thermal comfort will be improved.

In this case, the conditioned air from each of the indoor units 25 is blown out in a substantially horizontal direction, so that the conditioned air does not directly reach the vicinity of the floor surface, and the sense of draft near the floor surface is reduced. In addition to preventing the occurrence of the airflow, the airflow of the conditioned air is prevented from disturbing the airflow properties in the vicinity of each of the ventilation areas S, S,... As much as possible. ..Ventilation characteristics in parts are well maintained.

As described above, in the first ventilation mode, the local ventilation in each of the ventilation areas S, S,... Is performed well, and at the same time, the comfort near the floor is secured. In particular, it can be said that it is suitable as a supply / exhaust ventilation system used in an environment where a large amount of oil smoke is emitted and a room temperature is greatly increased, such as a yakiniku restaurant.

During the cooling operation, even if the conditioned air is blown from the indoor unit 25 in the horizontal direction, the conditioned air (cool air)
Moves to the floor side due to natural convection due to a difference in specific gravity, so that the air temperature near the floor surface becomes low and comfortable cooling can be realized, so that no trouble occurs.

[0048]B-2: Operation in the second ventilation mode, etc. In the second ventilation mode, the operation of the air supply fan 22 is controlled.
The indoor air A _TwoOnly the indoor air duct 6
Through the air supply duct 5 through the air supply A_ThreeAs
The above air supply / exhaust hoods via the above air supply pipes 3, 3,.
, And supply air blowout of the air supply / exhaust hood 1
It is blown out as a swirling flow from the mouth 15 in the form of an air curtain,
This air supply A_ThreeEach ventilation area S, S,
・ ・ Is surrounded. At the same time, the exhaust
With the operation of the fan 21, each of the above-mentioned air supply / exhaust hoods 1, 1,.
The suction force acts on each of the exhaust suction ports 14 of
The air in the ventilation area S receives this suction force and rises
Exhaust A_FourAs suction from the exhaust suction port 14
In rare cases, the air is discharged outside from the exhaust outlet 8 of the air supply duct 5
Is done. As a result, each of the ventilation areas S, S,.
In this case, the oil smoke generated in the cooking device 32 is
It is well discharged, and the room
Air A_TwoAnd the above air supply A_ThreeIs mixed with the air in the ventilation area S
Local ventilation action of the ventilation area S part by being supplied
Is realized.

On the other hand, the warm air in the room is accumulated near the ceiling 41 of the room space 40 as described above, and a large deviation occurs in the temperature distribution in the vertical direction of the room space 40. Is low, the comfort may be impaired. In this embodiment, the supply air A ₃ blown downward from the supply / exhaust hoods 1, 1,... since the capture warm room air a ₂ ceiling 41 near,
The interior space 40 occurs circulation acts in the vertical direction of the room air A ₂ (see dashed flow lines A ₅ in FIG. 1), the room temperature (air temperature) is increased in the floor near the improved thermal comfort Will do.

In this case, the conditioned air from each of the indoor units 25 is blown out in a substantially horizontal direction, so that the conditioned air does not directly reach the vicinity of the floor, and the sense of draft near the floor is reduced. In addition to preventing the occurrence of the airflow, the airflow of the conditioned air is prevented from disturbing the airflow properties in the vicinity of each of the ventilation areas S, S,... As much as possible. ..Ventilation characteristics in parts are well maintained.

As described above, in the second ventilation mode, the local ventilation in each of the ventilation areas S, S,... Is performed well, and at the same time, the comfort near the floor is secured. In particular, it can be said that it is suitable as a supply / exhaust ventilation system used in an environment where a large amount of oil smoke is emitted and a room temperature is greatly increased, such as a yakiniku restaurant.

[0052] Also, the second ventilation mode, does not take up outside air A _1, minimize lowering of the room temperature with the room ventilation, therefore, the exhaust A _4, such as soot while maintaining the room temperature
It can be said that this is a suitable form in a case where it is desired to clean only the interior by discharging only the air.

B-3: In the third ventilation mode such as the operation in the third ventilation mode, only the outside air A ₁ is supplied through the indoor air duct 6 with the operation of the air supply fan 22. The air supply duct 3 is introduced to the air duct 5 side, and the air supply A ₃ is supplied through the air supply pipes 3, 3,.
The supply air outlet 1 of the air supply / exhaust hood 1
5 is blown out as a swirling flow in the form of an air curtain, and the flow of the air supply A ₃ causes the above-mentioned respective ventilation areas S, S,.
Is surrounded. At the same time, with the operation of the exhaust fan 21, a suction force acts on the exhaust suction ports 14 of the supply / exhaust hoods 1, 1,. under the force, it is sucked from the exhaust inlet 14 at elevated tornado flow state as the exhaust a _4, is discharged outdoors from the exhaust outlet 8 of the air supply duct 5. Accordingly, in each of the ventilation areas S, S,..., The oil smoke generated in the cooking device 32 is efficiently discharged, and the room air A ₂ and the air supply A ₃ are supplied from around the ventilation area S. Is supplied to the ventilation area S side, thereby achieving a local ventilation action in the ventilation area S portion.

On the other hand, since only the outside air A ₁ as the supply air A ₃ is introduced into the interior space 40 side, a large cleaning effect of the air in the space 40 inside the chamber, thus, for example, the degree of contamination of the interior space 40 It is most suitable when the room temperature is high and early recovery of the indoor environment by ventilation is required.

Since the conditioned air from each of the indoor units 25 is blown out in a substantially horizontal direction, the conditioned air does not directly reach the vicinity of the floor, and a sense of draft near the floor is generated. Is prevented as much as possible, and the airflow of the conditioned air is prevented from being disturbed in the vicinity of each of the ventilation areas S, S,... As much as possible. The ventilation characteristics in are maintained satisfactorily.

As described above, in the third ventilation mode, the local ventilation in each of the ventilation areas S, S,... Is performed well, and at the same time, the comfort near the floor is secured. In particular, it can be said that it is suitable as a supply / exhaust ventilation system used in an environment where a large amount of oil smoke is emitted, such as a yakiniku restaurant.

[0057] In other above-described embodiments, the air supply A ₃ to be blown into the air curtain from the air supply outlet 15 of the supply and exhaust hoods 1
The swirling flow imparts a swirl component to the exhaust A ₄ of the inner, has been described this as an example those which aimed to promote the discharge action by the tornado flow, another embodiment of the present invention In the embodiment, a configuration is adopted in which the swirling component is not applied to the supply air A ₃ blown out from the supply air outlet 15 in the form of an air curtain, and the exhaust A ₄ inside the air curtain is discharged by natural suction. Can also be.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the overall configuration of a supply / exhaust ventilation system according to the present invention.

FIG. 2 is a structural explanatory view of a supply / exhaust hood shown in FIG.

FIG. 3 is a perspective view showing the overall configuration of a conventional ventilation system.

[Explanation of symbols]

1 is an air supply / exhaust hood, 2 is an exhaust pipe, 3 is an air supply pipe, 4 is an exhaust duct, 5 is an air supply duct, 6 is an indoor air duct, 7 is an indoor air intake, 8 is an exhaust air outlet, and 9 is outside air intake. Mouth, 11
Is a first hood, 12 is a second hood, 13 is an air supply chamber, 14 is an exhaust inlet, 15 is an air supply outlet, 21 is an exhaust fan, 22 is an air supply fan, 23 is a first damper, 24
Is a second damper, 25 is an indoor unit, 26 is an outlet, 31 is a table, 32 is a cooker, 40 is an indoor space, 41 is a ceiling, 42 is a room wall, A ₁ is outside air, A ₂ is room air, A ₃ supply, a ₄ is evacuated, X is the air supply means, Y is an exhaust unit.

Claims (5)

[Claims] 1. An air supply means (X) for blowing air supply (A ₃ ) in an air curtain shape so as to surround a predetermined local ventilation area (S) in an indoor space (40), and said air supply means. The air in the ventilation area (S) is sucked and exhausted (A ₄ ) inside the air supply (A ₃ ) blown out from (X) in the form of an air curtain.
A supply / exhaust ventilation system including an exhaust means (Y) for discharging air to the outside of the room, wherein the air supply means (X) serves as the air supply (A ₃ ) as a ceiling (41) of the indoor space (40). ), Using indoor air (A ₂ ) in the vicinity, outdoor air (A ₁ ) from outside, or mixed air of the indoor air (A ₂ ) and outdoor air (A ₁ ). Supply and exhaust ventilation system. 2. An air supply means (X) for blowing air supply (A ₃ ) in an air curtain shape so as to surround a predetermined local ventilation area (S) in an indoor space (40), and said air supply means. The air in the ventilation area (S) is sucked and exhausted (A ₄ ) inside the air supply (A ₃ ) blown out from (X) in the form of an air curtain.
A supply / exhaust ventilation system including an exhaust means (Y) for discharging air to the outside of the room, wherein the air supply means (X) serves as the air supply (A ₃ ) as a ceiling (41) of the indoor space (40). ), The indoor air (A ₂ ) in the vicinity, the outdoor air (A ₁ ) from the outdoor, and the mixed air of the indoor air (A ₂ ) and the outdoor air (A ₁ ) are selected according to the indoor ventilation requirements. A supply / exhaust ventilation system characterized in that the ventilation system is configured to be used. 3. The air supply means (X) according to claim 1, wherein the air supply means (X) imparts a swirl component to the air supply (A ₃ ) and blows out the swirl as an air curtain. A supply / exhaust ventilation system characterized by the following. 4. The air supply (A ₃ ) according to claim 1, 2 or 3, wherein room air (A ₂ ) near said ceiling (41) is supplied.
A supply / exhaust ventilation system, characterized in that a plurality of indoor air inlets (7) for introducing as a plurality are arranged in a dispersed manner in a surface direction of the ceiling (41). 5. The air conditioner indoor unit (25) according to claim 1, 2, 3, or 4, wherein an indoor unit (25) of the air conditioner is disposed on the side of the ceiling (41), and the indoor unit (25) blows air-conditioned air. Is set in a substantially horizontal direction.