JP4145502B2 - Local exhaust method and ventilation method, and local exhaust device and ventilation system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a local exhaust method and a ventilation method, and a local exhaust device and a ventilation system, and more particularly, in a room, a kitchen room, a smoking room, a toilet, etc. It is possible to identify the source of the pollutant that causes air pollution in a part of the room and the local exhaust and It relates to ventilation technology.
[0002]
[Prior art]
In general, in indoor spaces such as factories, kitchen rooms, smoking rooms, toilets, etc. where there are sources of pollutants that cause polluted air, exhaust and ventilation are required to clean the indoor atmosphere.
[0003]
In this case, as a ventilation method for indoor spaces that does not affect human life such as hot airflow, water vapor, odor, cigarette smoke, oil smoke, dust air, etc., the diluted air is mixed in the indoor atmosphere. In general, a so-called general ventilation system that replaces the air in the entire indoor space is adopted.
[0004]
In this general ventilation system, when both supply and exhaust are based on mechanical power, only supply is performed with mechanical power, and when exhaust is naturally discharged from the exhaust port, and only exhaust is performed with mechanical power, There are three types in which the air is taken in naturally from the air supply port. Usually, a mechanical exhaust system using a suction airflow by mechanical power is the mainstream.
[0005]
Legal standards for ventilation equipment for general buildings include safety and hygiene for persons calculated from the permissible carbon dioxide concentration in the room, and necessary for combustion in a room that uses fire. The standard based on pure technology and performance is ambiguous to the extent that the ventilation volume determined for the purpose of securing the amount of oxygen is determined. In the actual construction technology field or industry, it is common to use an inexpensive ventilation facility that does not spend more than necessary as long as the above legal standards for the ventilation facility are satisfied.
[0006]
By the way, a general indoor ventilation system that requires a certain level of comfort and workability, for example, a ventilation system in a kitchen room, as shown in FIG. 8, is a combustion heating cooking appliance a that is a source of pollutants. Is configured as a general ventilation system that ventilates the entire kitchen room arranged close to the wall surface of the room.
[0007]
That is, a suction port c of the exhaust duct b is opened on the ceiling above the cooking appliance a, and a duct exhaust fan (not shown) is provided at the outdoor end of the exhaust duct b. In addition, an exhaust hood e that captures contaminated air composed of a thermal jet d of pollutants generated by combustion heating of the cooking appliance a is attached to and connected to the suction port c to prevent the diffusion of the contaminated air. Yes. On the other hand, an air supply port h of an air supply duct g including an air supply box f is opened and an air conditioner i is provided on the ceiling in the center of the room away from the cooking appliance a. Further, an exhaust duct k including a ceiling exhaust fan j is opened in the ceiling near the opening m away from the cooking appliance a.
[0008]
And the thermal jet d of the pollutant generated by the combustion heating of the cooking appliance a is collected from the exhaust hood e and from the suction port c to the exhaust duct b by driving the duct exhaust fan of the exhaust duct b, and goes outside. While being exhausted, the room air at a position away from the cooking appliance a is exhausted to the outside through the exhaust duct k opened near the opening m by driving the ceiling exhaust fan j. On the other hand, fresh outdoor air is supplied from the air supply port h in the center of the ceiling through the air supply box f of the air supply duct g by driving a duct air supply fan (not shown), and the window of the kitchen room. The air supply flows naturally from m. Thereby, ventilation of the whole kitchen room will be performed.
[0009]
[Problems to be solved by the invention]
However, in such a conventional general ventilation system, there are problems as listed below, and an improvement thereof has been demanded.
[0010]
In other words, when a general ventilation system is used in a large room where a large amount of pollutants are generated as represented by a kitchen room, the ventilation volume becomes enormous and ventilation becomes inefficient. Since a large amount of is introduced, the air condition is the same as the outdoor environment.
[0011]
In addition, exhaust by suction airflow using mechanical power has poor controllability and cannot effectively exhaust only pollutants, which causes heat, water vapor, oil smoke, odor, fumes, etc. to accumulate in the room, Air conditioning conditions are worst.
[0012]
For example, in the case of a kitchen room, it satisfies the temperature and humidity conditions of the kitchen room, which is the standard of the Hazard Analysis Critical Control Point Method (HACCP: Hazard Analysis and Critical Control Point). Ventilation air volume and air conditioning capacity are enormous.
[0013]
The enormous ventilation air volume and air conditioning capacity mean that the capacity of the ventilation / air conditioning equipment increases, and the initial cost and running cost of the ventilation / air conditioning equipment increase.
[0014]
In addition, the increase in the equipment capacity of ventilation / air-conditioning equipment means that the electrical capacity of the equipment also increases, and this increase in the amount of energy used increases the generation of CO and CO2, which are global warming gases. Will be invited.
[0015]
In this regard, the following special-purpose ventilation systems may be adopted for indoor ventilation systems that require a certain level of comfort and workability, such as kitchen room ventilation systems.
[0016]
In other words, because of the strict legal standards in factory ventilation because harmful substances are also generated in the human body, the source of harmful pollutants is enclosed by a partition, and the operator puts his hands in the partition. A partial or local ventilation method using a draft chamber is adopted as effective.
[0017]
Furthermore, when the above-described draft chamber cannot be used depending on work contents, a so-called push-pull uniform flow method is implemented as an effective local ventilation method. In the local ventilation method using this push-pull uniform flow method, the air balance is locally completed by enveloping the pollutant generation source with the uniform flow of the blowing (push) airflow and the suction (pull) airflow.
[0018]
On the other hand, as a general ventilation system for ventilating a large indoor parking lot or the like, there is also a so-called deliberate ventilation system that uses an attracting action. In this ventilating system, a plurality of small blowers that guide and deliver indoor polluted air to the exhaust outlet are installed in order according to the intake and exhaust, and according to this ventilation method, the extension distance of the duct can be shortened. At the same time, there is an advantage of efficient ventilation.
[0019]
However, even in the local ventilation system and the overall ventilation system that are effective for these special applications, the following new problems have arisen in order to adopt it as an indoor ventilation system that requires a certain level of comfort and workability. So it has not been put into practice.
[0020]
In other words, in the local ventilation method using the draft chamber, the pollutant source is surrounded by a partition, so there is no risk of contaminated air leaking into the room, but things can be taken in and out of the work surface only through the door. Workability becomes extremely bad.
[0021]
In addition, the local ventilation method using the push-pull uniform flow method encloses the pollutant generation source and balances the air velocity and air volume of the blown air flow and suction air flow in the entire surrounding space. As the caliber increases, the airflow increases at the same time. Also, from the viewpoint of workability, not only the workability but also the hygiene of the lower air outlet is provided in the kitchen, and in the case of a kitchen, unlike the upper suction port, the lower air outlet is provided. The problem also remains from the aspect.
[0022]
Furthermore, the ventilation method by the deliberate ventilation method is not the local ventilation but the whole ventilation method, and it is assumed that the exhaust of the car accumulates and stays in the ceiling part of the indoor parking lot, and leads to the exhaust direction. The effect is that the exhaust efficiency is improved, but the airflow is not reduced. In addition, a large number of small de- riving fans are installed on the ceiling surface, so noise is high.
[0023]
The present invention has been made in view of such conventional problems, and the object of the present invention is to provide an exhaust and ventilation technology that can complete ventilation locally without impairing the comfort and workability. Is to provide.
[0024]
Another object of the present invention is to reduce the initial cost and the running cost of the ventilation / air-conditioning equipment by reducing the ventilation capacity / air-conditioning capacity, thereby eliminating the waste of electric energy and reducing the equipment capacity. An object of the present invention is to provide exhaust and ventilation technologies that can suppress the generation of greenhouse gases.
[0025]
[Means for Solving the Problems]
In order to achieve the above object, the local exhaust method of the present invention is a method for locally exhausting the air in the vicinity of the pollutant source in a room where the pollutant source causing the polluted air exists. As a result, an upward suction airflow that continues from the position above the pollutant source to the outside of the room is generated, and the pollutant source Upper side An upward air flow is generated from a nearby position. The suction airflow and the blowout airflow form a uniform upward airflow that passes through the position near the periphery of the pollutant source, and Contaminated air in the vicinity of the pollutant source is Suction It is characterized by forced collection and delivery to the air current.
[0026]
Further, the ventilation method of the present invention is a method of ventilating a room where a pollutant source that causes polluted air is present, and by applying the local exhaust method to the pollutant source, It is characterized by establishing a balance of indoor ventilation.
[0027]
As a preferred embodiment, an auxiliary blowing air flow enclosing and passing through the pollutant generation source is generated from the surrounding area of the exhaust region to which the local exhaust method is applied, and the pollutant generated from the pollutant generation source is blown out. Forced collection and delivery to an upward uniform air flow formed by the air flow and the suction air flow.
[0028]
Further, the local exhaust device of the present invention is suitably applied to the implementation of the local exhaust method, and is provided with a suction port at a position above the pollutant generation source to generate an upward suction air flow that continues to the outdoors. A suction airflow generating means for generating the pollutant generation source Upper side A blowout opening is provided in the vicinity, and a blown airflow generating means for generating an upward blown airflow is provided. The suction airflow generated by the suction airflow generation means and the airflow generated by the blowout airflow generation means form an upward uniform airflow that passes through a position near the periphery of the contaminant generation source, and Due to the attracting action of the blowout airflow, the contaminated air in the vicinity of the pollutant source is Suction It is configured to be forcibly collected and delivered to an air current.
[0029]
As a preferred embodiment, the blowout port of the blowout airflow generating means is from the work position of the operator. Horizontally Of the above pollutant source Upper side It is provided to face upward in the vicinity. Preferably, an airflow rectifying means for preventing diffusion of the blown airflow from the blown airflow generating means is provided at a position below the suction port of the suction airflow generating means. Further, an outlet is provided at an upper position of the pollutant generation source, and an auxiliary blowout airflow generating means for generating a downward auxiliary blowout air that encloses and passes the pollutant source is provided.
[0030]
Furthermore, the ventilation system of the present invention is characterized in that the above-mentioned local exhaust device is provided for the pollutant generation source so as to establish a balance of indoor ventilation.
[0031]
As a preferred embodiment, there is provided an auxiliary air flow generating means for generating an auxiliary air flow that surrounds and passes through the pollutant generation source, provided with an air outlet at a site around the exhaust region of the local exhaust device. .
[0032]
In the local exhaust and ventilation of the present invention, the intake airflow and the blowout airflow form a highly controllable upward uniform airflow that passes through a position near the periphery of the pollutant source that causes the polluted air. Contaminated air in the vicinity of the pollutant source is Suction It is forcibly collected and delivered to the air current.
[0033]
In this way, the upward uniform air flow for forcibly exhausting the polluted air passes through the vicinity of the pollutant generation source, and exhaust and ventilation can be completed locally without enveloping the pollutant generation source. As a result, there is no interference with the work operation of the worker, and the habitability and workability are not impaired.
[0034]
In addition, it is possible to reduce ventilation volume and air conditioning capacity by completing exhaust and ventilation locally, and to reduce the initial cost and running cost of ventilation and air conditioning equipment by keeping the capacity of ventilation and air conditioning equipment low. In addition, the generation amount of global warming gas can be reduced by reducing the amount of electric energy used.
[0035]
Embodiment
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0036]
Embodiment 1
A ventilation system according to the present invention is shown in FIG. This ventilation system is for a room that requires a certain level of comfort and workability, specifically for a kitchen room, and is a general ventilation system that ventilates the entire kitchen room. A local exhaust device P as shown in FIG.
[0037]
In this ventilation system, a combustion heating type cooking device 1 such as a table stove, which is a source of pollutants, is disposed close to the indoor wall 2, and the local heating system 1 is located above the combustion heating type cooking device 1. An exhaust device P is provided. Moreover, the conventional general exhaust apparatus 5 is provided in the ceiling 4 near the communication opening part 3 with the adjacent room away from the said cooking appliance 1, and the air conditioner 6 is provided in the ceiling 4 of the room center. . The exhaust device 5 has a conventionally well-known basic structure. One end of an exhaust duct 8 having a ceiling exhaust fan 7 is opened from the ceiling 4 to the room, and the other end (not shown) is outdoors. Open to the front.
[0038]
The local exhaust device P includes a suction airflow generation unit (suction airflow generation means) 10 and a blown airflow generation unit (blowing airflow generation means) 11 as main parts.
[0039]
The suction air flow generation unit 10 has a suction opening 15 provided at an upper position of the cooking appliance 1 so as to generate an upward suction air flow 16 that continues to the outdoors. The suction airflow 16 functions as an airflow that sucks and exhausts the contaminated air 30 mainly caused by the contaminants generated from the cooking appliance 1.
[0040]
Specifically, one end of the exhaust duct 17 is opened on the ceiling 4 above the cooking appliance 1 so as to face the room, and is used as the suction port 15, and the other end 17 a of the exhaust duct 17 is opened to the outdoors. An exhaust fan 18 having an exhaust port 18a is provided at the outdoor end 17a. In the illustrated embodiment, no means for capturing exhaust gas such as an exhaust hood is attached to the suction port 15, but an exhaust hood or the like may be attached and connected depending on the purpose.
[0041]
The blowout airflow generation unit 11 is located near the side of the cooking appliance 1. More specifically, as shown in FIG. The air outlet 20 is provided in the air outlet 20 so that an upward air flow 21 is generated.
[0042]
In particular, As shown in FIG. 1 and FIG. Cooking equipment 1 Upper side Near interior wall 2 position, A blowout nozzle 22 having a blowout opening 20 is provided in an upwardly standing manner, and this blowout nozzle 22 communicates with the outside through an air supply duct 23 and is connected to an outdoor end 23 a of the air supply duct 23 at an air supply opening. An air supply fan 24 having 24a is provided.
[0043]
As shown in the drawing, the piping path of the air supply duct 23, that is, the blowout airflow path, extends in the horizontal direction from the outside to the space between the ceiling 4 and the upper slab 25 of the kitchen room, and then vertically extends down the interior wall (not shown). Then, it passes through the casing of the cooking device 1, that is, the cooking table 26, and extends to the outlet 20 of the outlet nozzle 22. Thereby, as a result of air-cooling the inside of the casing 26, the heat insulation effect of the cooking appliance 1 itself is exhibited.
[0044]
In addition, the outlet 20 Horizontal direction The arrangement position is set so as not to interfere with the work range of the cook M who is the worker. Specifically, from the work position of cook M Horizontally In the position near the side of the cooking device 1 that is separated, for example, in FIG. ₁ ~ P _Four Or p _Five ~ P ₇ The outlet 20 is provided at one or a plurality of locations indicated by
[0045]
In the illustrated embodiment, for two cooking appliances 1, 1, p ₁ And p ₂ Are provided at positions opposite to the work position of the cook M and close to the indoor wall 2 with the cooking appliance 1 in between.
[0046]
Correspondingly, the suction port 15 of the suction airflow generation unit 10 is arranged so as to be located on the same vertical line as the blowout port 20.
[0047]
Then, by driving the exhaust fan 18 of the suction airflow generation unit (suction airflow generation means) 10, an upward suction airflow 16 that continues into the suction port 15 is generated, and by driving the air supply fan 24 of the blowout airflow generation unit 11. Then, an upward blowing air flow 21 extending linearly from the blowing port 20 of the blowing nozzle 22 to the suction port 15 is generated, and both the air flows 16 and 21 are formed coaxially.
[0048]
As a result, an upward uniform airflow generated by both the airflows 16 and 21 is formed so as to pass a position near the periphery of the cooking appliance 1, and is generated by the combustion heating of the cooking appliance 1 due to the attraction action of the blowing airflow 21. The contaminated air 30 in the vicinity of the cooking appliance 1 including the thermal jet of the pollutant is forcibly collected and delivered to the suction airflow 16. The suction airflow 16 that has received the contaminated air 30 is discharged to the outside through the exhaust duct 17.
[0049]
The opening shape of the outlet 20 is a circle as shown in FIG. 3 (a), for example, a rectangle (see (1)) or a fan (see (2) as shown in FIG. 3 (b). ) And the like and can be set as appropriate in consideration of the arrangement relationship with the cooking appliance 1 and the opening shape of the suction port 15.
[0050]
Next, conditions for setting the ventilation balance of the entire kitchen room including the exhaust action by the local exhaust device P will be described. In the present embodiment, the local exhaust device P is applied to the cooking appliance 1. It is configured so that the balance of ventilation in the entire kitchen room is established.
[0051]
Specifically, the airflow of the suction airflow 16 by the suction airflow generation unit 10 of the local exhaust device P is the amount of airflow of the blown airflow 21 by the blowout airflow generation unit 11 and the surroundings of the cooking appliance 1 that is attracted by this blown airflow 21. By being set by adding the amount of air, the balance of ventilation in the kitchen room is established. In this case, the suction airflow 16 is exhausted, and the blown airflow 21 by the blowout airflow generation unit 11 and the attracted airflow to be attracted are covered by the supply air.
[0052]
In relation to this, the blown air volume of the blown airflow generator 11 is set to be smaller than the intake airflow of the intake airflow generator 10.
[0053]
In this case, the suction air volume is determined by the suction surface wind speed and the attracted air volume. In this embodiment, the suction port 15 has no exhaust hood or the like, so the suction surface air speed is the duct wind speed of the exhaust duct 17. .
[0054]
Further, the blowout surface wind speed of the blowout air flow 21 is the same as the suction surface wind speed of the suction airflow 16. Therefore, the suction airflow 16 and the blowout airflow 21 are the airflows having the same wind speed and flowing uniformly in the same direction, and differing only in the airflow, and the uniform airflow in the direction passing through the peripheral position of the cooking appliance 1 is locally present. It is formed.
[0055]
Thus, in the ventilation system configured as described above, the contaminated air 30 including the heat jet of the pollutant generated by the combustion heating of the cooking appliance 1 is caused by the exhaust fan 18 and the supply fan 24 of the local exhaust device P. By being driven, it is forcibly attracted and captured by an upward uniform airflow (comprising a suction airflow 16 and a blowout airflow 21) formed so as to pass a position near the periphery of the cooking appliance 1, and from the suction port 15 to the exhaust duct 17. It is collected and exhausted outside the room.
[0056]
On the other hand, the room air at a location away from the cooking appliance 1 is exhausted to the outside through the exhaust duct 8 by driving the ceiling exhaust fan 7 of the exhaust device 5. In response to this, the air supply flows naturally through the opening 3.
[0057]
By such an operation of the ventilation system, the local ventilation as described above is completed in the exhaust region of the local exhaust device P, and the air flow in this region is the air flow as in the conventional general ventilation system of FIG. From the state where is mixed, the air supply and exhaust airflows are arranged as shown in FIGS. 1 and 2.
[0058]
As a result, the heat and the outside air that affect the circulating airflow of the air conditioner 6 are in the same state as the general living room, and the general ventilation amount in the kitchen room, that is, the ventilation by driving the exhaust device 5 is also the same as that of the local exhaust device P. The indoor space other than the exhaust area by driving is targeted, and the ventilation amount is suppressed to the level of a general living room.
[0059]
In other words, as a result of the local exhaust and ventilation being completed by the local exhaust device P, the ventilation amount and the air conditioning capacity of the entire kitchen room can be reduced.
[0060]
As a result, it is possible to reduce the initial cost and running cost of the ventilation and air conditioning equipment by keeping the capacity of the ventilation and air conditioning equipment low, and to reduce the amount of global warming gas generated by reducing the amount of electric energy used. Reduction can also be achieved.
[0061]
Moreover, the upward uniform air flow for forcibly exhausting the polluted air 30 passes through the position near the periphery of the cooking device 1 that is the pollutant generation source, and completes the exhaust and ventilation locally without enclosing the cooking device 1. As a result, there is no interference with the work operation of the cook M, and the habitability and workability are not impaired.
[0062]
Embodiment 2
This embodiment is shown in FIG. 4 and FIG. 5, and the configuration of the ventilation system of Embodiment 1 is slightly modified.
[0063]
That is, the ventilation system of the present embodiment has a configuration suitable for a case where the amount of contaminated air 30 generated by the combustion heating of the cooking appliance 1 is large, specifically, outside the exhaust region by the local exhaust device P. Further, an auxiliary blowing airflow generation unit 40 is provided.
[0064]
The auxiliary blowing air flow generation unit 40 generates a downward auxiliary blowing air flow 41 that wraps and passes through the cooking device 1 that is a pollutant generation source, and is provided at a site around the exhaust region by the local exhaust device P. The blowout box 45 is provided as a main part.
[0065]
The blow-out box 45 shown in the figure is provided on the ceiling 4 around the exhaust region of the local exhaust device P, and communicates with the air supply duct 23 of the local exhaust device P via a branch duct 46 to provide a power source, that is, The air supply fan 24 is shared with the local exhaust device P.
[0066]
The blowout box 45 includes two blowout openings 45a and 45b. One blowout opening 45a is opened horizontally toward the exhaust area of the exhaust device P, and the other blowout opening 45b is a cooking device. 1 is opened obliquely downward in the direction of 1.
[0067]
Thus, in the ventilation system including the auxiliary blowing airflow generation unit 40 as described above, in addition to the ventilation of the first embodiment, the blowing port 45a of the blowing box 45 in the upper part around the exhaust region by the local exhaust device P, 45b, in particular, a downward blowing outlet 45a generates an auxiliary blowing air flow 41a that encloses and passes the cooking appliance 1, and the contaminated air 30 generated from the cooking appliance 1 is sucked into the blowing air flow 21 by the local exhaust device P. It is forcibly attracted and collected into an upward uniform air flow formed by the air flow 16 and delivered.
[0068]
More specifically, the blown airflow 41a from the downward blowout opening 45a of the blowout box 45 is a downward blown airflow that envelops and passes through the entire periphery including the cooking appliance 1, and is mainly burned by the cooking appliance 1 Heat, odor, steam, harmful gas, fume, and the like contained in the contaminated air 30 generated by the air is actively carried toward the blown airflow 21 while being confined so as not to leak. On the other hand, the blown airflow 41b from the horizontal sideways blowout opening 45b of the blowout box 45 mainly produces the contaminated air 30a drifting and diffusing along the ceiling 4 in the direction of the suction airflow 16 or the blown airflow 21 by the local exhaust device P. To attract and attract. As a result, complete partial ventilation is completed as compared with the first embodiment.
[0069]
Embodiment 3
This embodiment is shown in FIGS. 6 and 7, and the configuration of the local exhaust device P of the first embodiment is slightly modified.
[0070]
That is, the local exhaust device P of the present embodiment has a configuration suitable when the distance between the suction port 15 of the suction airflow generation unit 10 and the blowout port 20 of the blowout airflow generation unit 11 is large, specifically An airflow rectification unit (airflow rectification means) 50 is provided below the suction port 15.
[0071]
The air flow rectifying unit 50 prevents diffusion of the blown air flow 21 from the blowout port 20, and specifically includes at least one rectifying hood 51. The illustrated airflow rectifying unit 50 includes two rectifying hoods 51, 51 arranged coaxially along the flow path of the blown airflow 21.
[0072]
As shown in FIG. 7 (a), the flow straightening hood 51 has a structure in which a cylindrical pipe 51b is integrally connected to the top of a downwardly conical hood main body 51a.
[0073]
The shape dimension of the lower end edge of the hood main body 51a is desirably set in accordance with the diffusion shape of the blown airflow 21 from the blowout port 20. In the illustrated case, since the opening shape of the outlet 20 is circular, the diffusion shape of the outlet airflow 21 is also theoretically approximated to a conical shape, and correspondingly, the shape of the lower edge of the hood body 51a. Is also circular, but of course it is not limited to this.
[0074]
Moreover, the arrangement | positioning location of the rectification | straightening hood 51 is set to the position where the hood main body 51a can capture all the upward blowing airflow 21. That is, in the present embodiment, as shown in FIG. 7 (b), the lower flow straightening hood 51 is disposed at a position where the hood body 51a captures all the air flow 21 from the air outlet 20, The upper rectifying hood 51 is disposed at a position where the hood main body 51 a captures all the air flow 21 from the cylindrical pipe 51 b of the lower rectifying hood 51.
[0075]
Thus, in the local exhaust device P configured as described above, when the distance between the inlet 15 and the outlet 20 is larger than in the case of the first embodiment, in other words, for example, in the kitchen room of a hotel Thus, even when the ceiling is high, an upward uniform airflow is surely formed by the blown airflow 21 and the suction airflow 16.
[0076]
In other words, the theoretical distance between the inlet 15 and the outlet 20 can be determined by appropriately increasing or decreasing the number of the rectifying hoods 51 constituting the airflow rectifying unit 50 under the above-described arrangement conditions. Even if it is such a magnitude | size, uniform airflow will be formed in the optimal state.
[0077]
In addition, the flow path of the uniform airflow formed between the suction port 15 and the blowout port 20 is not necessarily linear as in the illustrated embodiment by devising the arrangement position and posture of the rectifying hood 51. Instead, it may be curved.
[0078]
By forming such a curved uniform airflow, for example, it is possible to configure a local exhaust device P in which the suction airflow 16 at the suction port 15 and the blown airflow 21 at the blowout port 20 are not on the same straight line. It becomes.
[0079]
Note that the above-described embodiment is merely a preferred embodiment of the present invention, and the present invention is not limited to this, and various design changes can be made within the scope thereof.
[0080]
For example, in the illustrated embodiment, air supply from the outside is used as the blown airflow 21 of the blown airflow generator 11, but a blower fan (shown in the figure) is located near the cooking appliance 1, that is, at the blowout nozzle 22. (Omitted) may be installed, and the blowing airflow 21 may be generated by the blowing fan.
[0081]
【The invention's effect】
As described above in detail, according to the present invention, the suction airflow and the blowout airflow form a highly controllable upward uniform airflow that passes through the vicinity of the periphery of the pollutant source that causes the contaminated air, By the attracting action of the blowing airflow, the polluted air in the vicinity of the pollutant source is Suction Because it is forcibly collected and delivered to the air current, exhaust and ventilation can be completed locally without enveloping the pollutant source, there is no interference with the work operation of the worker, and the comfort and work Exhaust and ventilation technologies that do not impair the performance can be provided.
[0082]
In addition, it is possible to reduce ventilation volume and air conditioning capacity by completing exhaust and ventilation locally, and to reduce the initial cost and running cost of ventilation and air conditioning equipment by keeping the capacity of ventilation and air conditioning equipment low. In addition, the generation amount of global warming gas can be reduced by reducing the amount of electric energy used.
[0083]
That is, according to the local exhaust system according to the present invention, effective local or partial ventilation can be performed when the pollutant generation source is limited to a specific part, and ventilation has been performed by replacing the air in the entire conventional room. Compared to the general ventilation system, the capacity of the air conditioning and ventilation equipment can be greatly reduced.
[0084]
For example, taking a kitchen room as an example, the specific effects are as follows.
[0085]
a) The initial cost for air-conditioning / ventilation equipment is much cheaper than the conventional general ventilation system (40% lower than the conventional one), and it can easily meet the temperature and humidity standards of HACCP.
[0086]
b) Running costs related to air conditioning / ventilation equipment are reduced by 50% compared to the conventional general ventilation system, and further, it can be reduced by 80 to 90% compared to the conventional general ventilation system for HACCP. The reduction in running costs can greatly contribute to the restaurant industry.
[0087]
c) Because it is compatible with HACCP, the work environment of the kitchen room becomes comfortable, and a foodless method that eliminates the exhaust hood that has been required in the past can be adopted, and the image of the kitchen room can be brightened visually. .
[0088]
d) Legal measures can be easily taken even with the hoodless method.
[0089]
e) By reducing the ventilation air volume, the duct size is reduced, the workability is improved, and hot air is not collected on the ceiling surface, so that it is not necessary to increase the ceiling height and floor height of the kitchen room more than necessary. As a result, architectural economic effects can be expected.
[0090]
f) Since the base cut of the power consumption can be performed, the wasteful use of energy can be reduced and effective utilization can be achieved. In particular, when considering the increasing trend of power demand in the future, it is possible to suppress the addition of nuclear power plants.
[0091]
g) Significantly helps protect the global environment by eliminating energy waste. Expected to help COP3 promises.
[0092]
h) Significantly clearing the currently required HACCP standards, a temperature of 22 ° C. and a humidity of 60% are possible.
[0093]
i) The work environment in the kitchen room is greatly improved.
[0094]
j) Even when refurbishing (renewal) existing equipment, the air supply / exhaust air flow can be afforded, so the existing main duct can be reused, and even if the number of combustion heating equipment increases, the duct, air supply / exhaust Since the possibility that the fan can be reused is increased and the electric capacity is considered to be sufficient, it is also effective as a renewal method.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing a ventilation system of a kitchen room provided with a local exhaust device according to a first embodiment of the present invention.
FIG. 2 is a schematic configuration diagram showing a local exhaust device of the ventilation system.
FIG. 3 shows the structure of the air outlet of the air flow generating section in the local exhaust system, FIG. 3 (a) is a schematic plan view showing the arrangement of the air outlets, and FIG. 3 (b) is the opening shape of the air outlet. It is a top view which shows the example of a change.
FIG. 4 is a schematic configuration diagram showing a ventilation system for a kitchen room provided with a local exhaust device according to a second embodiment of the present invention.
FIG. 5 is a schematic configuration diagram showing a local exhaust device of the ventilation system.
FIG. 6 is a schematic enlarged view showing a configuration of a main part of a local exhaust device according to a third embodiment of the present invention.
7 shows an air flow rectification unit of the local exhaust device, FIG. 7 (a) is a perspective view showing a rectification hood as a component, and FIG. 7 (b) is an enlarged front view showing the configuration of the air flow rectification unit. It is.
FIG. 8 is a schematic configuration diagram showing a conventional kitchen room ventilation system.
[Explanation of symbols]
P Local exhaust system
M cook (worker)
1 Combustion heating type cooking equipment
2 indoor walls
3 openings
4 Ceiling
5 Exhaust device
6 Air conditioning equipment
10 Suction airflow generation part (suction airflow generation means)
11 Blowout airflow generator (Blowout airflow generation means)
15 Suction port
16 Suction airflow
17 Exhaust duct
18 Exhaust fan
20 outlet
21 Airflow
22 Blowout nozzle
23 Air supply duct
24 Air supply fan
26 Casing
30 Contaminated air
40 Auxiliary airflow generator
45 Blowout box
45a, 45b outlet
50 Airflow rectifier (Airflow rectifier)
51 Rectification hood

Claims (19)

In a room where there is a pollutant source that causes polluted air, a method of locally exhausting air in the vicinity of the pollutant source,
An upward suction airflow that continues from the upper position of the pollutant generation source to the outside is generated, and an upward blowout airflow is generated from the position near the side of the pollutant generation source . Forming an upward uniform airflow passing through a position near the periphery of the pollutant source;
Local exhaust method, characterized in that said by attracting action of the blowing airflow, and the contaminated air around the vicinity of the contaminant source adapted to deliver forcibly collected into the suction air flow.   2. The local exhaust method according to claim 1, wherein the suction airflow and the blowout airflow are formed on the same axis. The local exhaust method according to claim 1, wherein an air volume of the blown airflow is set to be smaller than an airflow of the suction airflow. A method of ventilating a room where a pollutant source that causes polluted air exists.
The ventilation method characterized by establishing the balance of indoor ventilation by applying the local exhaust method as described in any one of Claim 1 to 3 with respect to the said pollutant generation source. The air flow of the suction air flow is set by adding the air flow of the blown air flow and the air amount around the pollutant generation source attracted by the blown air flow, thereby establishing a balance of indoor ventilation. The ventilation method according to claim 4 . 5. The ventilation according to claim 4 , wherein a balance of indoor ventilation is established by using the suction air flow as exhaust and supplying the blown air flow and the induced air flow induced by supply air. Method. An auxiliary blowing airflow that encloses and passes the pollutant generation source is generated from the surrounding area of the exhaust region to which the local exhaust method is applied, and the pollutant generated from the pollutant generation source is formed by the blowing airflow and the suction airflow. The ventilation method according to claim 4 , wherein the air is forcedly collected and delivered to the upward uniform airflow. A device for locally exhausting the air in the vicinity of the pollutant source in a room where the pollutant source causing the polluted air exists,
Suction airflow generating means that is provided with a suction port above the contaminant generation source and generates an upward suction airflow that continues to the outdoors;
A blowout opening is provided in the vicinity of the upper side of the side of the pollutant generation source, and a blown airflow generating means for generating an upward blown airflow is provided.
The suction airflow generated by the suction airflow generation means and the blown airflow generated by the blowout airflow generation means form an upward uniform airflow that passes through a position near the periphery of the pollutant generation source. A local exhaust apparatus characterized by being configured such that polluted air in the vicinity of a pollutant generation source is forcibly collected and delivered to the suction airflow. The local exhaust device according to claim 8 , wherein the suction port of the suction air flow generation means and the blowout port of the blowout air flow generation means are arranged on the same vertical line. Air outlet of the blowing air flow generating means to claim 8, characterized in that provided facing upward on the side upper vicinity of the contaminant source spaced horizontally from the working position of the operator The local exhaust system described. The local exhaust apparatus according to claim 10 , wherein the blowout port of the blowout airflow generation means is provided at a position opposite to the work position of the worker across the contaminant generation source. The local exhaust apparatus according to claim 10 , wherein the blowout port of the blowout airflow generation means is provided at a position close to the indoor wall. The local exhaust device according to claim 8 , wherein the blown air volume of the blown airflow generating means is set to be smaller than the intake airflow volume of the suctioned airflow generating means. 9. The local exhaust device according to claim 8 , wherein an air flow rectifying means for preventing diffusion of the blown air flow from the blown air flow generating means is provided at a position below the suction port of the suction air flow generating means. A system for ventilating a room where a pollutant source that causes polluted air exists.
A ventilation system characterized in that the local exhaust device according to any one of claims 8 to 14 is provided for the pollutant generation source so as to establish a balance of indoor ventilation. system. The suction air volume of the suction air flow generation means is set by adding the blow air volume of the blow air flow generation means and the air volume around the pollutant generation source attracted by the blow air flow of the blow air flow generation means. ventilation system according to claim 15 the balance of ventilation is characterized by being configured to stand. The suction airflow passage of the suction airflow generation means is formed to extend from the suction opening to the outside of the room, and the blowout airflow passage of the blowout airflow generation means is formed to extend from the outdoors to the blowout opening. The ventilation system according to claim 15 . The ventilation system according to claim 17 , wherein the blown airflow passage of the blown airflow generation unit is formed to extend from the outside through the inside of the casing of the contaminant generation source to the blowout port. A blow-off port is provided at a portion around the exhaust region of the local exhaust device, and an auxiliary blow-off air flow generating means for generating an auxiliary blow-off air flow that encloses and passes a pollutant generation source is provided. Item 19. The ventilation system according to any one of Items 15 to 18 .

Images