JP5328086B2 - Kitchen exhaust hood, kitchen air supply and exhaust system - Google Patents

Description

  The present invention relates to an exhaust hood for exhausting, for example, water vapor or oil smoke generated from a cooking heat source in a commercial kitchen, and to an air supply / exhaust device using the exhaust hood.

  FIG. 14 is a diagram illustrating a schematic configuration of an exhaust device in a commercial kitchen. Reference numeral 50 denotes a cooking heat source such as a range provided on the floor 51 of the kitchen, and 52 denotes an exhaust hood attached to the ceiling 54. The exhaust hood 52 is shown in cross section. The exhaust hood 52 is provided in a ceiling portion above the cooking heat source 50, and includes a chamber 53 having an exhaust inlet and an exhaust outlet (not shown), and a surrounding wall portion 52 a surrounding the chamber 53. . Reference numeral 55 denotes an exhaust duct connected to an exhaust port (not shown) of the exhaust hood 52. The exhaust duct 55 is provided with an exhaust fan (not shown). Reference numeral 56 denotes an operator who performs cooking work in the kitchen.

  In such an exhaust device, the exhaust y such as water vapor and oil smoke generated by the cooking heat source 50 rises and is collected in the exhaust hood 52, and is exhausted to the outside as exhaust x from the exhaust duct 55 through the chamber 53. Is done. However, not all of the exhaust generated by the cooking heat source 50 is collected in the exhaust hood 52, and a part of the exhaust z is not collected by the exhaust hood 52 but becomes leaked exhaust. When such leak exhaust increases, the collection rate in the exhaust hood 52 decreases and ventilation cannot be performed sufficiently. In the conventional exhaust hood 52, since the surrounding wall portion 52a is provided in a direction perpendicular to the ceiling 54, the leaked exhaust gas staying near the ceiling outside the surrounding wall portion 52a wraps around from below the surrounding wall portion 52a. Thus, it is hardly expected to be collected again in the exhaust hood 52, and it is difficult to improve the collection rate.

  On the other hand, in Patent Document 1 below, an air supply unit is disposed outside the exhaust hood, and this air supply unit is positioned on the side close to the exhaust hood side to supply outside air into the kitchen. There is described an air supply / exhaust device that is divided into an air portion and an outer air supply portion that is located on the side away from the exhaust hood side and supplies air-conditioned air into the kitchen. According to this, since the outside air supplied from the outside air supply section becomes a kind of air curtain, the action of this air curtain prevents the exhaust generated from the cooking heat source from leaking from the collection range of the exhaust hood. Can do.

Japanese Patent No. 3081758

  However, even in the air supply / exhaust device of Patent Document 1, particularly in the case of a gas kitchen in which a large amount of combustion gas is generated, the air curtain does not function sufficiently, and the expanded combustion gas penetrates the air curtain to the outside of the exhaust hood. Because it leaks, it is difficult to completely collect the exhaust generated by the cooking heat source in the exhaust hood. And since the exhaust gas once leaked from the exhaust hood is partitioned by the air curtain, it is not collected again by the exhaust hood. Therefore, the air curtain has an adverse effect and there is a limit to improving the exhaust gas collection rate.

  By the way, in a commercial kitchen, ensuring a comfortable working environment and environmental hygiene for food is an important condition. Recently, not only combustion type kitchens but also electric type kitchens have been widely introduced for safety and ease of temperature control. Either electric type or combustion type is available to meet the needs of consumers. It is possible to select. However, because the heating mechanism differs between the electrification type and the combustion type, the amount of combustion exhaust differs, and an effective supply and exhaust system is required for effective ventilation.

For example, in a combustion-type kitchen using gas or the like, indoor oxygen is consumed and combustion and heating are performed, so that water vapor and combustion gas (CO _{2 and the} like) are generated and a large amount of ventilation is required. When ventilating, it is necessary to introduce outside air at the same time as exhaust. Especially in summer and winter, if outside air is introduced untreated, it becomes hot and cold for kitchen workers, and a comfortable working environment is created. It cannot be secured. Therefore, in order to maintain a comfortable environment, air conditioning equipment for treating the outside air is necessary, and the cost for that becomes a major issue.

On the other hand, since the electric kitchen does not involve combustion, there is little generation of water vapor, and there is no generation of combustion gas (such as CO ₂ ). Therefore, the amount of ventilation is small, and the cost of air conditioning can be reduced accordingly. However, in the case of electrified kitchens, the draft effect due to combustion (the effect that the steam and oil smoke rise within the collection range of the exhaust hood due to the rising airflow of the exhaust) cannot be expected, so it occurs due to the movement of people in the kitchen. Even if there is a slight crosswind, there is a problem that water vapor, oily smoke, and the like are deviated from the exhaust hood, and the collection rate of the exhaust hood is reduced and ventilation cannot be performed sufficiently.

  In the above-mentioned Patent Document 1, the outside air from the outside air supply unit becomes an air curtain, the inside air supply unit supplies unprocessed outside air, and the outside air supply unit supplies conditioned air. The amount of air-conditioned air discharged to the outside along with the exhaust can be reduced, and there is an advantage that untreated outside air does not directly hit the kitchen operator. However, in practice, most of the untreated outside air supplied from the inner air supply section is short-passed to the exhaust hood side and exhausted in the hood, so that it burns and rises particularly in the case of a gas kitchen. The exhaust gas to be exhausted is eventually attracted to the exhaust hood and exhausted by the processing air supplied from the outer air supply unit, and the load of air conditioning is not reduced as expected. In the case of an electric kitchen, combustion gas is not generated, so the amount of air to be supplied can be reduced accordingly.However, if the amount of supplied air cannot be controlled to match the amount of exhaust, the inside air supply section All of the supplied unprocessed outside air hits the worker without being exhausted, and the processed outside air supplied from the outer air supply unit becomes unnecessary and wasteful.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to recapture the exhaust gas leaked out of the hood and efficiently capture the exhaust gas generated from the cooking heat source. It is to provide an exhaust hood.

  Another object of the present invention is to provide a kitchen air supply / exhaust device capable of realizing energy saving by reducing the air conditioning load by efficient ventilation while allowing the kitchen operator to perform cooking work in a comfortable state. It is in.

An exhaust hood for a kitchen according to the present invention is an exhaust hood that is attached to a ceiling portion above a cooking heat source provided in a kitchen and has a surrounding wall portion that surrounds an exhaust port, and is provided on an outer surface of the surrounding wall portion. A non-rotating rectifying plate having an inclined surface inclined toward the ceiling and away from the surrounding wall portion is provided. This baffle plate may be provided on all outer surfaces of the surrounding wall portion or may be provided on a part of the outer surface of the surrounding wall portion depending on the location where the exhaust hood is attached.

In the present invention, in a state of attaching the exhaust hood to the ceiling, the rectifying plate, to cooking heat source, together with in the position of the outer not face the heat source, the upper end portion of the inclined surface of the current plate reaches near the ceiling. Then, leaked exhaust that was not collected by the exhaust hood out of the exhaust generated by the cooking heat source is guided along the inclined surface of the current plate by the suction action of the exhaust fan in the exhaust duct connected to the exhaust port. While wrapping around from below the surrounding wall , it is led into the exhaust hood and collected again. For this reason, the leaked exhaust does not stay near the ceiling, and the exhaust generated by the cooking heat source can be efficiently taken into the exhaust hood without leakage. As a result, the collection rate in the exhaust hood can be increased and efficient ventilation can be performed.

  The rectifying plate of the present invention is composed of, for example, a flat plate constituting a flat inclined surface. According to this, the shape of the current plate is simplified and the processing becomes easy. Further, as the rectifying plate of the present invention, a curved plate constituting an arcuate inclined surface can be used. According to this, the exhaust can be smoothly guided into the hood along the arcuate inclined surface.

  The rectifying plate of the present invention may have a suction port for sucking the exhaust near the ceiling. The suction port is provided so as to communicate with the internal space of the surrounding wall portion. According to this, in addition to the operation of the current plate described above, exhaust near the ceiling can be taken into the hood through the suction port, so that more efficient ventilation can be performed.

  Next, a kitchen air supply / exhaust device according to the present invention includes the above-described kitchen exhaust hood, and first air supply means for supplying air from the lateral direction toward the current plate in the exhaust hood. According to this, the exhaust gas stagnating near the ceiling can be actively guided to the current plate by the air from the first air supply means, and taken into the exhaust hood along the inclined surface of the current plate, Moreover, since the exhaust gas that is about to leak from the exhaust hood can be returned to the hood side, the collection rate in the exhaust hood can be increased and efficient ventilation can be performed.

  In the present invention, in the above-described kitchen air supply / exhaust apparatus, a second air supply unit that supplies air downward from the ceiling may be provided so that the airflow does not directly hit the cooking heat source. According to this, by the second air supply means, for example, air conditioned air is supplied to the worker in a spot manner, or an air curtain is formed by the air supplied from the second air supply means, The space surrounding the cooking heat source and the exhaust hood can be surrounded by an air curtain so that other air conditioning in the kitchen is not affected. Since the second air supply means is provided at a fixed distance from the exhaust hood so that the airflow does not directly hit the cooking heat source, the air curtain leaks even if the air curtain is formed as described above. There will be no obstacle to exhaust re-collection.

  Further, a kitchen air supply and exhaust device according to the present invention includes the above-described kitchen exhaust hood, and air supply means for supplying air downward from the ceiling so that the airflow does not directly hit the cooking heat source, The flow straightening plate of the exhaust hood has a suction port for sucking the exhaust near the ceiling, and this suction port can be configured to communicate with an exhaust duct connected to the exhaust port of the exhaust hood. According to this, in addition to the action of the rectifying plate, the exhaust gas stagnating near the ceiling can also be led directly to the exhaust duct through the suction port of the rectifying plate, so that air is directed from the side toward the rectifying plate. Even without providing an air supply means for supplying air, it is possible to increase the collection rate of exhaust gas and perform efficient ventilation.

  Further, a kitchen air supply and exhaust device according to the present invention includes the above-described kitchen exhaust hood, and air supply means for supplying air downward from the ceiling so that the airflow does not directly hit the cooking heat source, The flow straightening plate of the exhaust hood has a suction port for sucking the exhaust near the ceiling, and the suction port can be configured to communicate with the internal space of the surrounding wall portion of the exhaust hood. According to this, in addition to the action of the rectifying plate, the exhaust gas stagnating near the ceiling can be taken into the exhaust hood via the suction port of the rectifying plate, so that air can be drawn from the side toward the rectifying plate. Even without providing an air supply means for supplying air, it is possible to increase the collection rate of exhaust gas and perform efficient ventilation.

  According to the kitchen exhaust hood of the present invention, by providing a baffle plate on the outer surface of the hood wall, the exhaust leaking out of the hood is recollected to efficiently capture the exhaust generated from the cooking heat source. Can do.

  In addition, according to the kitchen air supply / exhaust device of the present invention, by combining the exhaust hood and the air supply means well, the kitchen operator can perform cooking work in a comfortable state, and efficient ventilation can be performed. Therefore, it is possible to reduce the air conditioning load and save energy.

FIG. 1 is a first embodiment of the present invention and shows a kitchen exhaust apparatus using an exhaust hood according to the present invention. In the figure, the same or corresponding parts as those in FIG. Reference numeral 50 denotes a cooking heat source such as a range provided on the floor 51 of the kitchen, and 52 denotes an exhaust hood attached to the ceiling 54. The exhaust hood 52 is shown in cross section. The exhaust hood 52 is provided in a ceiling portion above the cooking heat source 50, and includes a chamber 53 having an exhaust inlet and an exhaust outlet (described later), a surrounding wall portion 52a surrounding the chamber 53, and a surrounding wall portion 52a. And a baffle plate 52b provided on the outer surface. The rectifying plate 52b is provided so as to be inclined toward the ceiling 54 in a direction away from the surrounding wall portion 52a. The inclination angle of the rectifying plate 52b with respect to the ceiling 54 is preferably set to 30 ° to 45 °, but is not limited thereto. Reference numeral 55 denotes an exhaust duct connected to an exhaust port (described later) of the exhaust hood 52. The exhaust duct 55 is provided with an exhaust fan (not shown). Reference numeral 56 denotes an operator who performs cooking work in the kitchen. The exhaust device shown in FIG. 1 is different from the exhaust device shown in FIG. 14 in that the exhaust hood 52 is provided with a rectifying plate 52b. As can be seen from Figure 1, in the state of attaching the exhaust hood 52 to the ceiling 54, the rectifying plate 52b is to cooking heat source 50 is in the position outside without face the heat source 50, The inclination of the current plate 52b The upper end of the surface reaches the vicinity of the ceiling 54.

  2 and 3 are diagrams showing an example of a specific structure of the exhaust hood 52 used in the first embodiment. 2, (a) is a top view of the exhaust hood, (b) is a right side cross-sectional view, (c) is a front cross-sectional view, and (d) is a bottom view. In addition, illustration of the chamber 53 is abbreviate | omitted in FIG.2 (d). 3, (a) is a perspective view of the exhaust hood, (b) is a detailed view of portion A in FIG. 2 (c), and (c) is a detailed view of portion B in FIG. 2 (c).

As shown in FIG. 2, in this embodiment, the rectifying plate 52 b is provided on all outer surfaces of the surrounding wall portion 52 a of the exhaust hood 52, but the rectifying plate 52 b depends on where the exhaust hood 52 is attached. You may provide in the outer surface of a part of surrounding wall part 52a. For example, when the exhaust hood 52 is provided at the corner of the ceiling, the rectifying plate 52b may be provided only on the two adjacent surfaces of the surrounding wall 52a. The rectifying plate 52b is a flat plate that forms a flat inclined surface, and is fixed to the surrounding wall portion 52a by a bolt 70 so as not to rotate, as shown in FIG. As the fixing means, not only bolts but also means such as welding may be adopted. When the flat plate as described above is used for the rectifying plate 52b, the shape is simple and the processing becomes easy. Reference numeral 71 in FIG. 3C denotes an attachment hole for attaching the exhaust hood 52 to the ceiling, and is formed at the upper end of the rectifying plate 52b. A mounting bolt (not shown) is inserted into the mounting hole 71. Note that the mounting bolts may be concealed inside the surrounding wall portion 52b so as not to be seen from the outside.

  As shown in FIG. 2B, the mountain-shaped chamber 53 includes an exhaust inlet 53 a and an exhaust outlet 53 b, and the exhaust outlet 53 b corresponds to the exhaust outlet 57 provided on the upper surface of the exhaust hood 52. Yes. The exhaust duct 55 shown in FIG. 1 is connected to the exhaust port 57. The surrounding wall portion 52a is provided so as to surround the exhaust port 57 from four directions. A grease filter 58 as shown in FIG. 3 is detachably attached to the exhaust inlet 53a of the chamber 53. The grease filter 58 removes oily smoke and the like, and has a large number of slits. Exhaust gas from which oil smoke or the like has been removed by the grease filter 58 is guided to the exhaust duct 55 through the exhaust outlet 53b and the exhaust outlet 57, and discharged to the outside by an exhaust fan (such as a sirocco fan) (not shown) disposed in the duct. Is done.

  In FIG. 1, the exhaust y such as water vapor and oil smoke generated by the cooking heat source 50 rises and is collected in the exhaust hood 52, and is discharged to the outside as exhaust x from the exhaust duct 55 through the chamber 53. Further, a part of the exhaust gas is leaked without being collected by the exhaust hood 52. However, when the inclined rectifying plate 52b as described above is provided in the exhaust hood 52, the suction of the exhaust fan in the exhaust duct 55 causes the arrow a toward the inside of the exhaust hood 52 along the inclined surface of the rectifying plate 52b. Such an air flow can be formed. For this reason, even if a part of the exhaust generated by the cooking heat source 50 leaks out of the hood, the leaked exhaust can be guided into the exhaust hood 52 while being guided along the inclined surface of the rectifying plate 52b. In the conventional exhaust hood 52 of FIG. 14, as described above, it is difficult to recirculate the leaked exhaust outside the hood from the lower side of the vertical surrounding wall 52 a and re-collect it in the hood. In the exhaust hood 52 of the present invention, the leakage exhaust outside the hood can be easily circulated from the lower side of the surrounding wall portion 52a by the rectifying plate 52b and collected again in the hood. For this reason, leaked exhaust does not stay near the ceiling 54, and exhaust generated by the cooking heat source 50 can be efficiently taken into the exhaust hood 52 without leakage. As a result, the collection rate in the exhaust hood 52 can be increased and efficient ventilation can be performed.

  FIG. 4 is a second embodiment of the present invention, and shows a kitchen exhaust device using another exhaust hood according to the present invention. In the figure, the same or corresponding parts as those in FIG. 4 is different from FIG. 1 in that the exhaust hood 52 is provided with a falling portion 52c obtained by extending the surrounding wall portion 52a. Since other configurations are the same as those in FIG. 1, description of overlapping portions is omitted.

  In the second embodiment, the falling portion 52c makes it easy to collect the exhaust y generated by the cooking heat source 50. The falling part 52c may be extended longer in accordance with the exhaust amount, but if it is too long, the air reaches the inside of the exhaust hood 52 from the inclined surface of the rectifying plate 52b to the lower side of the falling part 52c. Flow (arrow b) becomes worse and hinders the recollection of exhaust leaking from the hood, so that the height of the surrounding wall portion 52a including the falling portion 52c is at most the ceiling at the lower end of the rectifying plate 52b. It is preferable to limit the distance from 54 to about twice.

  5 and 6 are views showing an example of a specific structure of the exhaust hood 52 used in the second embodiment. 5A is a top view of the exhaust hood, FIG. 5B is a right side sectional view, FIG. 5C is a front sectional view, and FIG. 5D is a bottom view. In addition, illustration of the chamber 53 is abbreviate | omitted in FIG.5 (d). FIG. 6 is a perspective view of the exhaust hood. 5 and 6, the same reference numerals are given to the same or corresponding parts as those in FIGS. 2 and 3. The structure of FIGS. 5 and 6 is basically the same as the structure of FIGS. 2 and 3 except that the falling portion 52c is provided, and thus detailed description thereof is omitted.

  In the second embodiment described above, similarly to the first embodiment, the leaked exhaust can be guided into the exhaust hood 52 while being guided along the inclined surface of the rectifying plate 52b, and the leaked exhaust outside the hood can be easily performed. It becomes possible to wrap around from the lower side of the falling part 52c and collect again in the hood. For this reason, leaked exhaust does not stay near the ceiling 54, and exhaust generated by the cooking heat source 50 can be efficiently taken into the exhaust hood 52 without leakage. As a result, the collection rate in the exhaust hood 52 can be increased and efficient ventilation can be performed.

  FIG. 7 is a third embodiment of the present invention, and shows a kitchen air supply / exhaust device in which air supply means is added to the configuration of FIG. In the figure, the same or corresponding parts as those in FIG. 7 is different from FIG. 1 in that air supply portions 61 and 62 are provided, and air supply ports 54a and 54b are provided in the ceiling 54. Since other configurations are the same as those in FIG. 1, description of overlapping portions is omitted.

  The air supply unit 61 is installed behind the ceiling 54 on the side opposite to the side on which the worker 56 performs cooking (on the right side in the figure). The air supply unit 61 supplies air from the lateral direction toward the rectifying plate 52b of the exhaust hood 52 via the nozzle 61a, and also supplies the cooking heat source 50 via the air supply port 54a formed in the ceiling 54. Air is supplied downward from the ceiling 54 so that the air current does not directly hit the ceiling. The air supply unit 62 is installed behind the ceiling 54 on the side (left side in the figure) on which the worker 56 performs cooking. The air supply unit 62 supplies air from the lateral direction toward the rectifying plate 52b of the exhaust hood 52 through the nozzle 62a, and the cooking heat source 50 through the air supply port 54b formed in the ceiling 54. Air is supplied downward from the ceiling 54 so that the air current does not directly hit the ceiling. The air supply parts 61 and 62 and the nozzles 61a and 62a constitute a first air supply means in the present invention, and the air supply parts 61 and 62 and the air supply ports 54a and 54b serve as a second air supply means in the present invention. Configure. In FIG. 7, air supply portions 61 and 62 are provided on the right and left sides of the cooking heat source 50, but the exhaust hood 52 has rectifying plates 52 b in four directions as shown in FIG. 2. Actually, similar air supply portions are provided on the front side and the rear side in FIG. However, how to arrange the air supply unit can be arbitrarily selected according to the situation of the kitchen, and the above is an example.

  In the third embodiment, since the air supply parts 61 and 62 supply air from the lateral direction toward the rectifying plate 52b of the exhaust hood 52, the exhaust gas stagnating near the ceiling 54 is discharged from the nozzles 61a and 62a. Can be actively guided to the rectifying plate 52b by the air supplied from the air and taken into the exhaust hood 52 along the inclined surface of the rectifying plate 52b as indicated by an arrow c. Moreover, the exhaust which is going to leak from the exhaust hood 52 can be returned to the hood by the air from the nozzles 61a and 62a. For this reason, the collection rate in the exhaust hood 52 can be increased and efficient ventilation can be performed. In addition, although the wind speed of the air supplied from the nozzles 61a and 62a is set to, for example, about 2.0 m / second, the value can be arbitrarily determined. A plurality of nozzles 61a and 62a may be provided. Here, the air supply by the nozzle is taken as an example. However, the present invention is not limited to this. For example, a long and narrow air supply port provided with a louver for adjusting the wind direction is provided in the ceiling 54, and the rectifying plate is provided via this air supply port. You may make it supply air to 52b from a horizontal direction.

  In the third embodiment, the air supply units 61 and 62 supply downward air into the kitchen via the air supply ports 54a and 54b. Therefore, for example, air conditioned air is supplied to the worker 56 in a spot manner, or an air curtain is formed by the air supplied from the air supply ports 54 a and 54 b, and the cooking heat source 50 and the exhaust hood 52. The space surrounding the room can be surrounded by an air curtain so that other air conditioning in the kitchen is not affected. In this case, the air supply units 61 and 62 are provided at a fixed distance from the exhaust hood 52 so that the airflow does not directly hit the cooking heat source 50. Therefore, even if the air curtain is formed as described above, The curtain does not interfere with the recollection of leaked exhaust. The air blown out from the air supply ports 54a and 54b is set at a wind speed of, for example, about 1.5 m / second to 5.0 m / second so as to reach the floor 51. This value is also determined arbitrarily. Can do.

  Furthermore, in the third embodiment, the air supplied from the nozzles 61a and 62a is directed to the rectifying plate 52b and does not directly hit the worker 56. Therefore, unconditioned air is supplied from the nozzles 61a and 62a. The air conditioned air may be supplied from the air supply ports 54a and 54b. Alternatively, conditioned air may be supplied from the air supply unit 62 on the side where the worker 56 is present, and unair-conditioned outside air may be supplied from the air supply unit 61 on the side where the worker 56 is not present. In consideration of the air conditioning load, unair-conditioned outside air may be supplied from all of the air supply units at times other than summer and winter.

  Note that the inside of the kitchen is set to a weak negative pressure so as not to let out the internal odor, but the amount of exhaust air is greater than or equal to the amount of air supplied so that the air in the kitchen does not flow into the cabin. In addition to the exhaust generated by cooking, if the air-conditioned air in the room is exhausted more than necessary, it is difficult to reduce the load of the air conditioning. It is important to adjust the displacement from Fig. 2). At the same time, it is necessary to adjust the amount of air supplied from the air supply ports 54a and 54b (and the nozzles 61a and 62a). If the air supply amount is too large compared to the exhaust amount, the upward air flow from the cooking heat source 50 is disturbed, the collection rate in the exhaust hood 52 is reduced, and the inside of the kitchen becomes positive pressure and the odor in the kitchen is generated. It flows into the guest room. Therefore, it is desirable that the exhaust amount from the exhaust port 57 and the supply amount from the air supply ports 54a and 54b (and the nozzles 61a and 62a) can be adjusted in accordance with the combustion type kitchen and the electric type kitchen. .

  FIG. 8 shows a fourth embodiment of the present invention, in which the same or corresponding parts as in FIG. 8 is different from the third embodiment of FIG. 7 in that the exhaust hood 52 is provided with a falling portion 52c, and the other configurations are the same as those in FIG. Since the exhaust hood 52 provided with the falling part 52c has already been described with reference to FIGS. 5 and 6, the description thereof is omitted here.

  In the fourth embodiment, the same effect as that of the third embodiment can be obtained. Even if the falling portion 52c is present, the air supplied from the nozzles 61a and 62a toward the rectifying plate 52b can secure the air flow as indicated by the arrow d, so that the exhaust near the ceiling 54 is exhausted. Can be taken into the exhaust hood 52 along the inclined surface of the rectifying plate 52b.

  FIG. 9 shows a fifth embodiment of the present invention, which is a modification of the third embodiment shown in FIG. In the figure, the same or corresponding parts as those in FIG. In FIG. 9, the nozzles 61 a and 62 a of FIG. 7 are omitted, and a rectifying plate 52 b of the exhaust hood 52 is provided with a suction port 64 for sucking exhaust near the ceiling 54. The suction port 64 communicates with the exhaust duct 55 connected to the exhaust port 57 (FIG. 2) of the exhaust hood 52 via the communication pipe 63. Other configurations are the same as those in FIG.

  Also in the fifth embodiment, an air flow (arrow e) by the rectifying plate 52b can be formed as in the first to fourth embodiments. In addition to this, the exhaust gas stagnating in the vicinity of the ceiling 54 can also be directly guided to the exhaust duct 55 from the suction port 64 of the rectifying plate 52b through the communication pipe 63, and thus directed toward the rectifying plate 52b. Even if the nozzles 61a and 62a (FIG. 7) for supplying air from the lateral direction are not provided, the exhaust gas collection rate can be increased and efficient ventilation can be performed. The diameter of the suction port 64 is set to about 30 mm to 50 mm, and the wind speed at the suction port 64 is set to about 5.0 m / second, but these values can also be arbitrarily determined. A plurality of suction ports 64 may be provided in each rectifying plate 52b.

  FIG. 10 shows a sixth embodiment of the present invention, in which the same or corresponding parts as in FIG. 9 are given the same reference numerals. 10 is different from the fifth embodiment of FIG. 9 in that the exhaust hood 52 is provided with a falling portion 52c, and the other configurations are the same as those in FIG. Since the exhaust hood 52 provided with the falling part 52c has already been described with reference to FIGS. 5 and 6, the description thereof is omitted here.

  In the sixth embodiment, the same effect as that of the fifth embodiment can be obtained. Even if there is the falling portion 52c, in addition to the air flow (arrow f) by the rectifying plate 52b, the exhaust is directly guided to the exhaust duct 55 from the suction port 64 of the rectifying plate 52b through the communication pipe 63. Because it can also be done, efficient ventilation can be performed.

  FIG. 11 shows a seventh embodiment of the present invention, which is a modification of the third embodiment shown in FIG. In the figure, the same or corresponding parts as those in FIG. In FIG. 11, the nozzles 61 a and 62 a of FIG. 7 are omitted, and a rectifying plate 52 b of the exhaust hood 52 is provided with a suction port 66 for sucking the exhaust near the ceiling 54. The suction port 66 communicates with the internal space of the surrounding wall portion 52 a of the exhaust hood 52 through the air passage 65. Other configurations are the same as those in FIG.

  In the seventh embodiment, in addition to the air flow (arrow g) by the rectifying plate 52b, the exhaust gas stagnating near the ceiling 54 is exhausted from the suction port 66 of the rectifying plate 52b through the air passage 65. 52 can be led to the inside of the rectifying plate 52b, so that it is possible to increase the exhaust gas collection rate and to provide efficient ventilation without providing the nozzles 61a and 62a (FIG. 7) for supplying air from the lateral direction toward the rectifying plate 52b. It can be performed. A plurality of suction ports 66 may be provided in each rectifying plate 52b. Further, as the exhaust hood 52, a hood provided with a falling portion 52c shown in FIG. Furthermore, the air supply units 61 and 62 may be omitted, and only the exhaust hood 52 provided with the suction port 66 and the air passage 65 may be used.

  In the present invention, various embodiments can be adopted in addition to the embodiments described above. For example, in the above embodiment, a flat plate forming a flat inclined surface is used as the rectifying plate 52b. However, as shown in FIG. 12A, a rectifying plate 52b made of a curved plate forming an arcuate inclined surface is used. It can also be used. According to this, the exhaust can be smoothly guided into the hood along the arcuate inclined surface. FIG. 12B shows an example in which a rectifying plate 52b made of a curved plate is attached to an exhaust hood 52 having a falling portion 52c. In FIG. 12, the rectifying plate 52b is formed in a concave surface, but the rectifying plate 52b may be formed in a convex surface.

  As another embodiment, as shown in FIG. 13A, a dome-shaped curved portion 52d is provided on the inner side of the surrounding wall portion 52a to promote a smooth flow of air, and water and oil droplets have a side surface. It is good also as a structure which is easy to flow along. FIG. 13B shows an example in which a dome-shaped curved portion 52d is provided inside the exhaust hood 52 provided with the falling portion 52c, and a groove portion 52e is provided at the lower end of the falling portion 52c. Water droplets and oil droplets adhering to the inside of the hood flow along the curved portion 52d and are collected by the groove portion 52e.

  In the above embodiment, an exhaust hood and an air supply / exhaust device used for a commercial kitchen are taken as an example. However, the present invention is not limited to a commercial kitchen, but an exhaust hood or an air supply / exhaust device used for a general household kitchen. Can also be applied.

It is a figure which shows the exhaust apparatus by 1st Embodiment of this invention. It is a figure which shows the specific structure of the exhaust hood used by 1st Embodiment. It is a figure which shows the specific structure of the exhaust hood used by 1st Embodiment. It is a figure which shows the exhaust apparatus by 2nd Embodiment of this invention. It is a figure which shows the specific structure of the exhaust hood used by 2nd Embodiment. It is a figure which shows the specific structure of the exhaust hood used by 2nd Embodiment. It is a figure which shows the air supply / exhaust apparatus by 3rd Embodiment of this invention. It is a figure which shows the air supply / exhaust apparatus by 4th Embodiment of this invention. It is a figure which shows the air supply / exhaust apparatus by 5th Embodiment of this invention. It is a figure which shows the air supply / exhaust device by 6th Embodiment of this invention. It is a figure which shows the air supply / exhaust apparatus by 7th Embodiment of this invention. It is a schematic sectional drawing of the exhaust hood by other embodiment. It is a schematic sectional drawing of the exhaust hood by other embodiment. It is a figure which shows schematic structure of the exhaust apparatus in a commercial kitchen.

Explanation of symbols

DESCRIPTION OF SYMBOLS 50 Heat source for cooking 52 Exhaust hood 52a Enclosure part 52b Rectifier plate 53 Chamber 54 Ceiling 54a, 54b Air supply port 55 Exhaust duct 56 Worker 57 Exhaust port 61, 62 Air supply unit 61a, 62a Nozzle 63 Communication pipe 64 Suction port 65 Air Passage 66 Suction port

Claims (8)

In the exhaust hood having a surrounding wall portion that is attached to the ceiling portion above the cooking heat source provided in the kitchen and is provided surrounding the exhaust port,
Provided on the outer surface of the surrounding wall portion is a non- rotating rectifying plate provided with an inclined surface inclined in a direction away from the surrounding wall portion toward the ceiling,
In a state in which an exhaust hood mounted to the ceiling, the rectifying plate, relative to the cooking heat source, together with in the position of the outer not face the heat source, the upper end portion of the inclined surface of the rectifier plate is reached near the ceiling,
Leakage exhaust that has not been collected by the exhaust hood among the exhaust generated by the cooking heat source is guided along the inclined surface of the rectifying plate by the suction action of the exhaust fan in the exhaust duct connected to the exhaust port. An exhaust hood for a kitchen, wherein the exhaust hood wraps around from the lower side of the surrounding wall portion , is led into the exhaust hood, and is collected again. The kitchen exhaust hood according to claim 1,
The said baffle plate consists of a flat plate which comprises a flat inclined surface, The exhaust hood for kitchens characterized by the above-mentioned. The kitchen exhaust hood according to claim 1,
The kitchen hood according to claim 1, wherein the current plate is a curved plate forming an arcuate inclined surface. The kitchen exhaust hood according to claim 1,
The rectifying plate has a suction port for sucking exhaust near the ceiling,
An exhaust hood for a kitchen, wherein the suction port communicates with the internal space of the surrounding wall. An exhaust hood for a kitchen according to claim 1,
First air supply means for supplying air from the lateral direction toward the current plate in the exhaust hood;
An air supply / exhaust device for a kitchen, comprising: The kitchen air supply / exhaust device according to claim 5, further comprising:
A kitchen air supply / exhaust device comprising second air supply means for supplying air downward from the ceiling so that an airflow does not directly hit the cooking heat source. An exhaust hood for a kitchen according to claim 1,
An air supply means for supplying air downward from the ceiling so that an airflow does not directly hit the cooking heat source;
With
The rectifying plate of the exhaust hood has a suction port for sucking exhaust near the ceiling,
An air supply / exhaust device for a kitchen, wherein the suction port communicates with an exhaust duct connected to an exhaust port of an exhaust hood. An exhaust hood for a kitchen according to claim 1,
An air supply means for supplying air downward from the ceiling so that an airflow does not directly hit the cooking heat source;
With
The rectifying plate of the exhaust hood has a suction port for sucking exhaust near the ceiling,
The kitchen air supply / exhaust device, wherein the suction port communicates with the internal space of the surrounding wall portion of the exhaust hood.

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