Smoke removal device

Abstract

To provide a smoke removal device capable of facilitating duct installation, unnecessitating installation of an excessively complicated duct, and sufficiently removing smoke from a broiler.SOLUTION: A smoke removal device 100 is disposed above a broiler 30. Also, the smoke removal device 100 has: an inner hood 11 composed of a cylindrical body whose diameter is expanded toward a lower end and which forms a suction route IR for sucking smoke generated by the broiler 30; an outer hood 12 composed of a cylindrical body whose diameter is expanded downward, which is provided outside the inner hood 11 to have a double structure, and forms an air supply route SR for supplying air for the broiler 30 between the inner hood 11 and itself; a straightening vane 13 which is provided near an entrance of the suction route IR and is movable vertically; a suction port 14 formed between a peripheral edge of the straightening vane 13 and an opening of the inner hood 11; and wind direction adjustment means 15 provided near an outlet of the air supply route SR.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a smoke removal device that is primarily used in restaurants, such as yakiniku restaurants and izakayas, where customers grill food provided to them on a grill. [Background technology]

[0002] A typical example of a restaurant where customers grill the food provided to them on a grill is a yakiniku restaurant, so for the sake of convenience, the following explanation will be given using a yakiniku restaurant as an example. In yakiniku restaurants, exhaust hoods are installed above the grills in the stores to handle the smoke generated when customers grill meat and vegetables on the grills (roasters). Patent documents 1 to 3 describe inventions related to such exhaust hoods.

[0003] Patent Document 1 describes an air supply and exhaust ventilation system that includes an air supply means X that blows out supply air A3 in the form of an air curtain, and an exhaust means Y that sucks in and exhausts the air inside the supply air A3 blown out in the form of an air curtain (Fig. 1). This air supply and exhaust ventilation system uses room air A2 near a ceiling 41, outside air A1, or a mixture of room air A2 and outside air A1 as the supply air A3.

[0004] On the other hand, Patent Document 2 describes an indoor exhaust hood device (Fig. 1) that is composed of a double-layered duct 2, a double-layered hood 3, an intake section 4, and an exhaust section 5. The double-layered duct 2 is composed of a double-layered duct body that has an exhaust pipe inserted into an air intake pipe via an air intake passage, and the double-layered hood 3 is composed of the double-layered hood 3 body and a guide vane section. The double hood 3 body connected to one end of the two-layer duct 2 body is composed of an outer hood and an inner hood arranged through an air duct, the guide vane section uses induced flow to exhaust external air from the air intake passage through the exhaust pipe, the intake section is composed of an intake port opened at the other end of the air intake pipe, and the exhaust section is composed of a fan installed at the other end of the exhaust pipe.

[0005] Furthermore, Patent Document 3 describes a smoke exhaust device for a grilling table. This smoke exhaust device is configured by disposing a double-layered hood (inner hood 5, outer hood 6) in the space above the grilling table, with inner and outer hoods connected to a suction exhaust pipe and a forced air intake pipe for outside air, respectively, and forcibly supplying outside air through a ring-shaped gap at the bottom between the hoods to suck in and exhaust smoke associated with grilling meat while surrounding the grilling table (Fig. 1). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-349589 [Patent Document 2] Japanese Patent Application Laid-Open No. 2001-201132 [Patent Document 3] Japanese Patent Application Laid-Open No. 2001-235159 Summary of the Invention [Problem to be solved by the invention]

[0007] However, the exhaust hoods installed in yakiniku restaurants are expected to be safer and more economical. For example, fire prevention measures at yakiniku restaurants remain an important issue even today. One reason for this is that while yakiniku restaurants treat oily smoke (oily smoke) using common exhaust hoods or the inventions described in Patent Documents 1 to 3, it is not possible to completely prevent oil from entering the exhaust duct. If oil enters and accumulates in the duct, there is a risk that a flame rising from the exhaust hood or grill will spread to the oil in the duct, causing the fire to spread.

[0008] In addition, the exhaust duct is equipped with a fire damper, and if a flame enters the exhaust duct and the temperature inside the duct rises suddenly, the fire damper will activate to prevent the fire from spreading. However, the accumulated oil may harden and reduce the operation of the fire damper, which may lead to the fire spreading inside the duct.

[0009] Furthermore, in yakiniku restaurants, an exhaust hood is installed for each grill and an exhaust duct is connected to each exhaust hood, which makes the design and construction of the ducts complicated. As can be seen from the drawings in each document, the inventions described in Patent Documents 1 to 3 also have complex duct configurations that are difficult to simplify. Furthermore, from the perspective of duct design and construction, these cannot be said to be economical.

[0010] Therefore, the present invention aims to provide a smoke removal device that allows for easy duct installation, eliminates the need for overly complicated ducts, and is capable of sufficiently removing smoke from a grill. [Means for solving the problem]

[0011] The smoke removal device according to the present invention is disposed above the grill, an inner hood consisting of a cylindrical body whose diameter increases toward the lower end and which forms an intake path for sucking in smoke generated from the grill; an outer hood that is a cylindrical body whose diameter increases toward the bottom end and is provided outside the inner hood so as to form a double structure, and that forms an air supply path between the inner hood and the outer hood to supply air to the roasting appliance; a vertically movable straightening plate provided near the inlet of the suction path; an intake port formed between a peripheral edge of the straightening plate and an opening of the inner hood; a wind direction adjusting means provided near the outlet of the air supply path; It has.

[0012] In this way, the hood section has a double structure consisting of an inner hood and an outer hood, so smoke generated from the grill is drawn into the hood section through the intake port and the intake path, and at the same time, clean air is supplied from the hood section to the grill via the air intake path. In addition, by moving the straightening plate up and down, the opening area of the intake port that takes in smoke changes due to the straightening plate near the entrance of the intake path. The air direction adjusting means adjusts the direction of the air blown from the air supply path to the roasting device.

[0013] The smoke removal device is provided on the top of the hood section. It is desirable that the configuration include an air purification unit having at least an oil removal means, an air purification means, and a fan that sends air treated by the oil removal means and the air purification means to the air supply path.

[0014] By providing such an air purification unit, smoke drawn in through the intake path of the hood section is sucked into the air purification unit by the fan, processed by the oil removal means and air purification means, and sent by the fan to the air intake path of the hood section, where it is blown out towards the grill.

[0015] In particular, the air purification unit has an outlet for discharging the treated air into a room; The air purification unit is preferably configured to be able to send a portion of the treated air to the outlet by adjusting the direction and volume of the airflow.

[0016] By having the outlet, the fan can send the treated air to the intake air path and also send a portion of the treated air to the outlet.

[0017] It is preferable that the smoke removal device has a configuration in which the hood portion and the air cleaning unit are integrated. The smoke removal device further includes a sensor for detecting heat and / or light; a control unit that stops the operation of the fan based on a detection notification from the sensor; It is desirable that the configuration has the following.

[0018] The sensor can detect heat and / or light, so it can detect flames from a grill or other appliance and notify the control unit. The control unit then stops the fan when it receives the notification from the sensor. [Effects of the Invention]

[0019] With this configuration, the smoke removal device according to the present invention has the following features: (1-1) The hood section has a double structure, so smoke from the grill is drawn into the hood section via the suction path, and at the same time, clean air is supplied from the hood section to the grill via the air supply path. This clean air creates an air curtain around the grill, preventing the smoke generated from the grill from diffusing to the surrounding area. (1-2) In addition, by installing a straightening plate, the flow rate of the smoke sucked in from the intake port increases, so the fan installed in the exhaust path (exhaust duct) installed in the building can exhaust the smoke with the minimum necessary airflow. In addition, the opening area of the intake port changes when the straightening plate is raised or lowered, so by adjusting this opening area according to the smoke generation situation (amount of smoke from the grill) and adjusting the operating status of the fan accordingly, the fan's airflow volume required to exhaust the smoke can be minimized and made appropriate. (1-3) Furthermore, since the air direction adjusting means adjusts the direction of the air blown from the air supply path to the roasting appliance, an air curtain can be generated according to the smoke generation situation.

[0020] (2) In addition, by providing an air purification unit, smoke drawn into the hood can be processed and reused as air to generate an air curtain.

[0021] (3) In particular, since the air purification unit has an outlet, the fan can send a portion of the treated air to the outlet.

[0022] (4) Furthermore, by integrating the hood section and the air purification unit, installation and removal can be easily performed.

[0023] (5) Furthermore, by having a sensor and a control unit, it is possible to detect flames and stop the operation of the fan, thereby preventing secondary disasters. [Brief explanation of the drawings]

[0024] [Figure 1] 1A and 1B are schematic diagrams of a smoke removal device according to the present invention, and FIG. 1B shows a configuration in which the oil pan is removed from the configuration shown in FIG. 1A. FIG. [Figure 2] FIG. 2(i) is an image diagram showing the operation of the smoke removal device shown in FIG. 1, and FIG. 2(ii) is an image diagram showing the operation when the rectifying plate is moved upward. [Figure 3] 10(i) is an image diagram showing the operation when the airflow direction adjusting means is directed outward, and FIG. 10(ii) is an image diagram showing the operation when the airflow direction adjusting means is directed inward. DETAILED DESCRIPTION OF THE INVENTION

[0025] The following describes in detail an embodiment of the present invention, but the following description of the components is one example (typical example) of the embodiment of the present invention, and the present invention is not limited to the following content unless the gist of the present invention is changed. Furthermore, components having the same functions are denoted by the same reference numerals in the drawings, and detailed description thereof will be omitted.

[0026] [Smoke removal device] First, a smoke removal device 100 according to the present invention will be described with reference to FIG. The smoke removal device 100 includes a hood section 10 and an air cleaning unit 20, and is disposed above a grill 30 in a yakiniku restaurant or the like.

[0027] [Hood section] The hood portion 10 has an inner hood 11 and an outer hood 12 . The inner hood 11 is made of a cylindrical body whose diameter widens toward its lower end (lower surface) 101, and forms an intake path IR for drawing in smoke generated from the roaster 30. Meanwhile, the outer hood 12, like the inner hood 11, is also made of a cylindrical body whose diameter widens toward its lower end 101, and is provided outside the inner hood 11 to form a double structure. The outer hood 12 and the inner hood 11 form an air supply path SR for supplying air to the roaster 30.

[0028] The hood portion 10 is provided with a vertically movable straightening plate 13 near the entrance of the suction path IR (near the opening of the inner hood 11). An intake port 14 is formed between the periphery of the rectifying vane 13 and the opening of the inner hood 11. In other words, the intake port 14 is the portion of the opening of the inner hood 11 that is not blocked by the rectifying vane 13. The hood portion 10 is provided with a wind direction adjusting means (wind direction adjusting vane) 15 near the outlet SRE of the air supply path.

[0029] Furthermore, the hood portion 10 has an opening at part or all of its upper end (upper surface 102), to which an intake connection port, an air supply connection port, or a duct of the air purification unit 20 is connected, as will be described in detail later. Furthermore, since the hood section 10 sucks in oil-containing smoke (oil smoke) generated in the grill 30 through the suction path IR, it has an oil pan 16 to collect oil that has adhered to the inside of the inner hood 11. The oil pan 16 is removable (see Figure 1 (ii)), and adhering oil can be removed by removing and cleaning it.

[0030] [Air purifying unit] The smoke removal device 100 is attached to the upper part of the hood section 10 (see FIG. 1, etc.). Specifically, an inlet connection port (not shown) is provided at the lower end (lower surface) 201 of the air purification unit 20, which connects to an inlet path IR located at the upper end 102 of the hood section 10. Furthermore, an air supply connection port (not shown) is provided at the lower end 201 of the air purification unit 20, outside the inlet connection port, which connects to an air supply path SR located at the upper end 102 of the hood section 10. With this configuration, the air purification unit 20 takes in smoke sucked into the inlet path IR of the hood section 10 from the inlet port 14, supplies the treated air to the air supply path SR of the hood section 10, and blows it out from an outlet SRE of the air supply path.

[0031] The air purification unit 20 also has at least an oil removal means 21, an air purification means 22, and a fan 23 that sends out air (purified air) treated by the oil removal means 21 and the air purification means 22 to the air intake path SA of the hood section 10. The oil removal means 21 is, for example, a grease filter, while the air cleaning means 22 is, for example, a deodorizing filter or an electric dust collector.

[0032] In this embodiment, the air purification unit 20 has an outlet 24 for discharging the air (cleaned air) treated by the smoke removal device 100 into the room (the space surrounding the smoke removal device 100). In this case, the air purification unit 20 adjusts the direction and volume of the treated air using the fan 23, so that a portion of the treated air can be sent out from the outlet 24 into the room.

[0033] [Smoke removal device in operation] Next, the operation of the smoke removal device 100 will be described with further reference to FIGS. The smoke removal device 100 is installed above the grill 30 of a yakiniku restaurant or the like, and sucks in smoke S (small dashed arrow) generated from the grill 30 (see Figure 2(i)). Because the hood section 10 has a double structure consisting of an inner hood 11 and an outer hood 12, the smoke S from the grill 30 is drawn into the hood section 10 via the suction path IR, and at the same time, clean air CA (large dashed arrow) is supplied from the hood section 10 toward the grill 30 via the air supply path SR. This clean air CA creates an air curtain around the grill 30, preventing the smoke S generated from the grill 30 from diffusing to the surrounding area (see Figure 2(i)).

[0034] As described above, inner hood 11 is formed of a cylindrical body whose diameter increases toward lower end 101, and therefore suction path IR also increases in diameter (widens) downward. The opening area (width) of suction port 14 that takes in smoke S can be adjusted by raising and lowering straightening plate 13 provided near the entrance of suction path IR (near the opening of inner hood 11).

[0035] More specifically, when the straightening plate 13 is moved upward, the opening area of the suction port 14 decreases (narrows), and the flow rate of the smoke S sucked in through the suction port 14 increases (see FIG. 2(ii)). Therefore, for example, if the amount of smoke S generated from grill 30 decreases, the airflow rate of fan 23 of air purification unit 20 can be adjusted to a minimum and appropriate level accordingly. By appropriately adjusting the opening area of air inlet 14 by moving baffle plate 13 up and down in this way, the airflow rate of fan 23 can be reduced by about 30% compared to when no adjustment is made.

[0036] Furthermore, by adjusting the opening area of the intake port 14 and adjusting the operating conditions of the fan 23, the air volume of the fan 23 required to exhaust the smoke S can be minimized and made appropriate. For example, if the amount of smoke S generated from the grill 30 increases, the opening area of the intake port 14 increases (widens) by moving the straightening plate 13 downward, and by setting the air volume of the fan 23 to an exhaust air volume that corresponds to this, more smoke S can be taken in.

[0037] In this way, the smoke removal device 100 can reduce the air volume of the fan 23 compared to when there is no straightening vane 13, so a smaller fan 23 can be selected, thereby reducing initial costs. In addition, by reducing the air volume of the fan 23 during operation, power consumption can be reduced, and running costs can also be reduced.

[0038] Furthermore, the smoke removal device 100 can use the airflow direction adjustment means 15 to adjust the direction of the clean air CA blown out from the outlet SRE of the air supply path to the roaster 30. This makes it possible to generate an air curtain according to the smoke S generation situation (the amount of smoke S generated from the roaster 30). Specifically, when a large amount of smoke S is generated from the grill 30, an air curtain that expands outward can be generated by directing the direction of the clean air CA toward the outer periphery of the lower end 101 of the hood section 10 (see Figure 3(i)).

[0039] Conversely, when the amount of smoke S generated from the grill 30 is small, the direction of the clean air CA blowing out can be directed toward the center of the lower end 101 of the hood section 10, thereby creating an air curtain that collapses inward (see Figure 3(ii)).

[0040] As described above, the smoke removal device 100 can adjust the air volume of the fan 23 to a minimum and appropriate level, can adjust the air curtain generated by changing the blowing direction of the clean air CA, and can sufficiently remove smoke S from the grill 30.

[0041] The smoke S drawn in through the suction path IR of the hood section 10 is drawn into the air purification unit 20 by the fan 23 and processed by the oil removal means 21 and the air purification means 22. The smoke S is then sent by the fan 23 to the air supply path SR of the hood section 10 and blown out from its outlet SRE toward the grill 30.

[0042] In other words, by including the air purification unit 20, the smoke removal device 100 can process the smoke S drawn into the hood section 10 and reuse it as air (cleaned air CA) for generating an air curtain. This eliminates the need for installation of an exhaust duct to discharge the drawn-in smoke S outdoors or an air intake duct to draw in outdoor air.

[0043] This eliminates the problem of fire spreading inside the duct that occurred with conventional duct systems, and reduces the cost and labor required for duct construction. Furthermore, because the air purification unit 20 can generate purified air CA, there is no need to take in outside air, and the room does not become cold, especially in winter, due to the intake of cold outside air, and the air conditioning load can be reduced.

[0044] Here, the air purification unit 20 has an outlet 24, and by adjusting the wind direction and volume of this treated air (cleaned air CA) using the fan 23, it is possible to send out a portion of the cleaned air CA to the outlet 24. Specifically, the air purification unit 20 can use the fan 23 to adjust the volume of the cleaned air CA sent to the air supply path SR (wind direction) and the volume of the cleaned air CA sent to the outlet 24 (wind direction).

[0045] Therefore, for example, when the amount of smoke S from the grill 30 is small, there is no need to generate an excessive amount of air curtain, so the amount of clean air CA sent to the air supply path SR can be reduced and the excess clean air CA can be discharged into the surrounding space from the outlet 24. This prevents the user from feeling uncomfortable when an excessive amount of air curtain hits their face or clothes, and improves the cleanliness of the air in the room.

[0046] [Other configurations] The smoke removal device 100 according to this embodiment includes a sensor 25 that detects heat and / or light, and a control unit 26 that stops the operation of the fan 23 based on a detection notification from the sensor 25. In this embodiment, the sensor 25 is provided in the suction path IR (see FIG. 1, etc.), but there are no limitations on the location or number of the sensors 25.

[0047] By providing the sensor 25 and the control unit 26, it is possible to detect a flame and stop the operation of the fan 23, thereby further improving safety.

[0048] Furthermore, in this embodiment, the hood portion 10 and the air purification unit 20 are described as separate entities (the air purification unit 20 is attached to the top of the hood portion 10), but the hood portion 10 and the air purification unit 20 can also be integrated.

[0049] When integrated, for example, simply by placing a smoke removal device 100 above each grill 30 at each seat in a restaurant, the smoke S from the grill 30 can be treated, including removing oil, and reused as clean air CA to generate an air curtain. Furthermore, because it is easy to install and remove (dismount), it reduces the labor required by workers when replacing the oil removal means 21 and air purification means 22, cleaning, or changing the layout of the restaurant.

[0050] [When not using the air purifier unit] The smoke removal device 100 of this embodiment has been described as being equipped with the air purification unit 20, but the smoke removal device of the present invention can also be used without the air purification unit 20, by using the hood section 10 as follows.

[0051] As described above, the hood section 10 has the intake path IR and the supply path SR located at the upper end 102, to which an exhaust duct that discharges smoke to the outdoors is connected in place of the intake connection port of the air purification unit 20, and an intake duct that supplies purified air is connected in place of the intake connection port of the air purification unit 20. In this case, the duct connected to the air purification unit 20 has a double structure in which the intake duct is provided outside the exhaust duct (for example, the two-layer duct described in Patent Document 2).

[0052] Therefore, the smoke removal device can suck smoke S generated from the roaster 30 into the intake path IR from the intake port 14 and discharge it outdoors via the exhaust duct, or supply clean air supplied from the air conditioner via the intake duct and intake path SR from the intake path outlet SRE towards the roaster 30.

[0053] As mentioned above, the smoke removal device can adjust the fan's airflow to a minimum and appropriate level, so the fan (exhaust fan) installed in the exhaust duct connected to the smoke removal device in the building (store) can also exhaust smoke with the minimum necessary airflow. Reducing the fan's airflow allows the exhaust duct to be smaller, which reduces the initial cost of duct installation. Furthermore, since the size of the exhaust duct can be reduced, there is no need to install an excessively complicated duct, and the duct can be easily installed.

[0054] In this way, the smoke removal device according to the present invention can facilitate the design and construction of ducts even if the air purification unit 20 is not used.

[0055] The smoke removal device 100 and the like described above are examples of embodiments of the smoke removal device according to the present invention, and the present invention is not limited to these configurations as long as the gist of the present invention is not changed. For example, the position, size, number, etc. of the outlets 24 provided in the air purification unit 20 can be changed as appropriate. [Industrial Applicability]

[0056] The smoke removal device of the present invention allows for easy duct installation, eliminates the need for excessively complicated ducts (no ducts are required at all), and is capable of sufficiently removing smoke from grills, making it industrially useful as it can be used in a variety of restaurants and other establishments. [Explanation of symbols]

[0057] 10 Hood section 101 Lower end of hood part (inner hood, outer hood) 102 Top end of hood part (inner hood, outer hood) 11 Inner hood 12 outer hood 13 Rectifier plate 14 Intake port 15 Wind direction adjustment means 16 Oil pan 20 Air Purification Unit 201 Lower end of air purifier unit 21 Oil removal means 22 Air purification methods 23 Fans 24 Outlet 25 sensors 26 Control Unit 100 Condensation prevention cover IR intake path SR air supply route SRE Air supply route outlet S smoke CA Clean Air

Claims

1. A smoke removal device disposed above the grill, an inner hood consisting of a cylindrical body whose diameter increases toward the lower end and which forms an intake path for sucking in smoke generated from the grill; an outer hood that is a cylindrical body whose diameter increases toward the bottom end and is provided outside the inner hood so as to form a double structure, and that forms an air supply path between the inner hood and the outer hood to supply air to the roasting appliance; a vertically movable straightening plate provided near the inlet of the suction path; an intake port formed between a peripheral edge of the straightening plate and an opening of the inner hood; a wind direction adjusting means provided near the outlet of the air supply path; A smoke removal device having a hood portion having a

2. On the top of the hood portion, 2. The smoke removal device according to claim 1, comprising an air purification unit having at least an oil removal means, an air purification means, and a fan that sends air treated by the oil removal means and the air purification means to the air supply path.

3. the air purification unit has an outlet for discharging the treated air into a room; 3. The smoke removal device according to claim 2, wherein the air purification unit is capable of sending a portion of the treated air to the outlet by adjusting the direction and volume of the air.

4. The smoke removal device according to claim 2 or 3, wherein the hood portion and the air cleaning unit are integrated.

5. a sensor that detects heat and / or light; a control unit that stops the operation of the fan based on a detection notification from the sensor; 4. The smoke removal device according to claim 2 or 3, comprising:

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