JP4919632B2 - Exhaust system - Google Patents

Description

  The present invention relates to an exhaust device that constitutes a ventilation system provided in the vicinity of a heating cooker in a kitchen of a general household or a kitchen of a restaurant.

  For use in a ventilation system that discharges smoke, steam, etc. generated from a cooker (for example, an electromagnetic cooker) installed in a kitchen of a general household to the outside, suck into the wall around the cooker. There has been proposed a system that exhausts smoke or steam sucked from a suction port by providing a mouth and operating a fan unit provided outdoors (see, for example, Patent Documents 1 to 3).

JP 2004-076976 A Japanese Patent Laid-Open No. 10-259936 Japanese Utility Model Publication No. 63-055040

  In the “exhaust device for cooking” described in Patent Document 1, a reduced pressure space is provided in front of the fan suction side in order to improve the efficiency of the fan. The effect of increasing efficiency cannot be obtained. Therefore, the entire apparatus tends to be enlarged, and it is difficult to meet the demand for slimming and miniaturization.

  On the other hand, in the case of the “ventilation fan mounting structure” described in Patent Document 2 and the “ventilation fan” described in Patent Document 3, the “exhaust duct surrounding area” and the “bell mouth surrounding area” communicate linearly with each other. Therefore, if the construction site satisfies such conditions, the desired ventilation performance can be obtained. However, if construction is performed such that the area surrounded by the exhaust duct and the area surrounded by the bell mouth do not communicate linearly with each other, the suction efficiency of the fan is reduced and the desired ventilation performance can be obtained. Can not.

  Moreover, when the ventilation fan described in patent document 2 is installed in a kitchen, this ventilation fan is a system that collects and exhausts smoke, steam, etc. generated from a cooker and spread upward in a hood. Especially when an electromagnetic cooker is installed, smoke etc. often diffuses in front of the hood, so it is not possible to ventilate more efficiently than a suction system with a suction grill on the vertical wall. .

  The problem to be solved by the present invention is to provide an exhaust device that can be exhausted through an exhaust port opened on a vertical wall near the cooker, has a high fan suction efficiency, and can achieve slimming and downsizing of the device. It is to provide.

The exhaust device of the present invention communicates with an exhaust port provided in a vertical wall surface around a cooker arranged in a building, and ventilates the vicinity of the cooker through an exhaust path having an opening on the outer wall surface of the building. An exhaust device attached to the outer wall surface,
An exhaust inlet having a rectangular cross section connected to the opening, and a centrifugal fan that sucks air through a suction port arranged on the downstream side in communication with the exhaust inlet,
The exhaust inlet, the suction port and the centrifugal fan are arranged in series,
An air supply path for introducing outside air is provided above the exhaust path that penetrates the vertical wall surface in a state partitioned from the exhaust path ,
Between the exhaust inlet and the suction port, a bypass space in which an air flow can be diffused is provided,
In the bypass space, a guide member that promotes the flow of air from the exhaust inlet to the suction port is provided,
The guide member viewed from the centrifugal fan side has a closed curve shape . Here, the “centrifugal fan” is one in which the inflow direction and outflow direction of the airflow into the fan are orthogonal, that is, the airflow enters the fan along the axial direction and passes through in the radial direction. Say. Further, “arranged in series” means that the exhaust inflow port, the suction port, and the centrifugal fan are partially arranged on the same straight line.

  With such a configuration, the suction action of the centrifugal fan can discharge the air sucked from the exhaust port opened in the vertical wall surface near the cooker to the outside, and each of the exhaust inlet, the suction port and the centrifugal fan Are arranged on the same straight line, and a linear exhaust movement path is formed between the exhaust inlet and the centrifugal fan, so pressure loss is minimized and the fan Suction efficiency is also increased. In addition, since the distance from the exhaust inlet to the inlet can be minimized, the overall apparatus can be made slim and small.

  As compared with gas cookers, electromagnetic cookers generate less updraft during cooking, so it is necessary to provide a suction grill (exhaust port) at a lower position than conventional kitchens. In order to suck in without leakage, it is necessary to widen the horizontal dimension of the exhaust port in the left-right direction of the electromagnetic cooker to ensure a horizontal suction area. For this reason, the exhaust port established in the vertical wall surface around the electromagnetic cooker and the exhaust port on the outer wall surface communicating therewith are usually elongated rectangles.

Therefore, when the exhaust inlet and the suction port of the centrifugal fan are arranged in series, a portion that does not communicate linearly occurs between the exhaust inlet and the suction inlet, and the downstream side from the upstream side of the exhaust inlet. When the side is viewed directly, a part of the suction port is located outside the surrounding area of the exhaust inlet and is hidden from the exhaust inlet. Therefore, in the present invention, by providing a bypass space where the air flow can be diffused between the exhaust inlet and the suction inlet, the exhaust inlet when the suction inlet is directly viewed from the upstream side of the exhaust inlet. Since the air flow is diverted to a part of the suction port hidden on the surrounding region side of the air, that is, the region that is not in linear communication with the exhaust inlet at the suction port, the air flows smoothly into the suction port. The fan suction efficiency can be increased.

  Further, if the inner diameter of the suction port is larger than the short side dimension of the exhaust inlet and smaller than the long side dimension of the exhaust inlet, the suction port size is within the long side dimension of the exhaust inlet. Therefore, it is effective in reducing the size of the apparatus, and the centrifugal fan can be increased in diameter within the range of size reduction, so that necessary ventilation performance can be ensured.

  In this case, it is desirable that (inner diameter of the suction port−short side dimension of the exhaust inlet) / (thickness of the bypass space) = 1.2 to 8.0. Here, the “thickness of the bypass space” refers to the dimension of the bypass space in the direction from the exhaust inlet to the suction port. With such a configuration, the air flow can be smoothly detoured to a region that does not communicate linearly with the exhaust inlet at the suction port, so that excellent suction efficiency can be maintained.

On the other hand, in the present invention, a guide member that promotes the flow of air from the exhaust inlet to the suction port is provided in the bypass space, so that the air flow from the exhaust inlet to the suction port of the centrifugal fan is reduced . Since the movement is promoted, the thickness of the bypass space can be reduced, which is effective for slimming and miniaturization of the device.

Further, in the case of the present invention , the shape of the guide member viewed from the centrifugal fan side is a closed curve , so that the air flow flowing into the detour space from the exhaust inflow port spreads to the corner portion in the detour space. Therefore, the air flow can be smoothly guided to the suction port.

  Further, if the guide member has a shape that induces an air flow to a region that is not linearly connected to the exhaust inlet at the suction port, the air flow that flows into the detour space from the exhaust inlet is sucked into the suction port. The suction efficiency can be further improved because the gas can be efficiently guided to the region not communicating linearly with the exhaust inlet at the mouth.

  Further, if the installation direction of the exhaust inlet with respect to the suction inlet is rotatable within a range of at least 0 to 90 degrees, the exhaust inlet from the suction grill (exhaust outlet) provided on the vertical wall surface near the cooker Even if the cross-sectional shape of the exhaust path leading up to is either a vertically long rectangle or a horizontally long rectangle, installation suitable for it can be performed.

  If a motor for driving the impeller of the centrifugal fan is arranged on the upstream side of the impeller, and a flow guide means for guiding the air colliding with the motor or its cover to the suction port of the centrifugal fan is provided, Since space can be used effectively, it is effective in reducing the size and slimming of the entire device. Moreover, since the air which collided with the motor cover etc. can be rapidly guide | induced to the suction inlet of a centrifugal fan, the fall of suction efficiency can be suppressed.

  In this case, if an inclined portion for avoiding accumulation of oil droplets or water droplets is provided on the upper portion of the flow guiding means, oil droplets adhering to the flow guiding means can be prevented from accumulating there. The flow means can be kept clean for a long time.

  If an oil recovery part is provided at the bottom of the guide member, oil droplets and the like adhering to the guide member can be recovered quickly, so that the guide member can be kept clean for a long period of time.

  According to the present invention, it is possible to provide an exhaust device that can be exhausted through an exhaust port provided in a vertical wall surface near a cooking device, is relatively thin and small, and has high fan suction efficiency.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a view showing the vicinity of a cooking appliance in which an exhaust device according to an embodiment of the present invention is installed, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 (b) is a side view of the exhaust device, FIG. 4 (a) is a bottom view of the exhaust device shown in FIG. 3, and FIG. 4 (b) is a diagram showing a wind direction plate constituting the exhaust device. FIG. 5 is a partially cutaway front view of the exhaust device shown in FIG. 6 is a schematic view showing the schematic structure inside the exhaust device shown in FIG. 2, FIG. 7 is a perspective view showing the exhaust device shown in FIG. 5 with the cover open, and FIG. 8 is an impeller showing the exhaust device shown in FIG. FIG. 9 is a perspective view showing the exhaust device shown in FIG. 8 in a detached state.

  As shown in FIGS. 1-5, the exhaust apparatus 10 of this embodiment is connected with the exhaust port 3 opened in the vertical wall surface 2 around the electromagnetic cooker 1 arrange | positioned at the kitchen in a building, and this building In order to ventilate the vicinity of the electromagnetic cooker 1 through the exhaust path 5 having the opening 4 on the outer wall surface 2 a of the object, the object is attached to the opening 4 of the exhaust path 5. A suction grill 6 having a lid 12 that can be raised and lowered in the vertical direction, a plurality of rectifying vanes 6a, and the like is attached to the exhaust port 3. The lid 12 has a function of opening and closing the exhaust port 3. When the exhaust device 10 is operating in the state shown in FIG. 1, the lid 12 guides smoke generated during use of the electromagnetic cooker 1 to the exhaust port 3. It can also serve as a guide.

  The external shape of the exhaust device 10 is a rectangular parallelepiped shape, and includes a main body portion 10a fixed to the outer wall surface 2a by a plurality of screws 7 and a cover portion 10b covering the main body portion 10a, as will be described later. The cover portion 10b is attached to the main body portion 10a so as to be openable and closable via a plurality of hinges 8 (see FIG. 7), and an detachable lock mechanism 9 is provided to keep the cover portion 10b closed. It has been. In the present embodiment, the cover portion 10b has a shape that covers the entire front portion of the main body portion 10a, but is not limited thereto. Further, since the external shape of the exhaust device 10 is not limited to a rectangular parallelepiped shape, an inclined portion, a curved surface portion, a roof shape portion or the like for promoting the flow of raindrops or the like can be provided on the upper surface portion thereof.

  As shown in FIG. 4, the bottom surface of the exhaust device 10 is provided with an exhaust port 13 that is opened in a lattice shape, and as shown in FIGS. 3B and 4, the upper portion of the exhaust port 13 of the centrifugal fan 16. Is mounted with a guiding member 11 having a plurality of vanes 11a for guiding the exhaust discharged from the exhaust port 13 in a direction away from the outer wall surface 2a of the building. The exhaust device 10 is connected to the opening 4 of the outer wall surface 2a of the building, and is disposed downstream of the exhaust inlet 14 having a rectangular cross section and in communication with the exhaust inlet 14. And a centrifugal fan 16 that sucks air through the suction port 15.

  The centrifugal fan 16 is a so-called sirocco fan, and as shown in FIGS. 2 and 5, an impeller 18 attached to the rotating shaft 17 a of the motor 17 and an abbreviated arrangement disposed so as to surround the impeller 18. It is formed of a cochlear fan casing 19 or the like. The suction port 15 has a bell mouth shape, and in the present embodiment, forms a circular opening having an inner diameter slightly smaller than the outer diameter of the impeller 18.

  As shown in FIG. 2, in the exhaust device 10, the exhaust inlet 14, the suction port 15, and the centrifugal fan 16 are arranged in series in this order, and between the exhaust inlet 14 and the 15 suction port, A bypass space 20 in which an air flow can be diffused is provided. That is, a part of each of the exhaust inlet 14, the inlet 15 and the centrifugal fan 16 is arranged so as to be located on the same straight line in this order. In addition, as shown in FIG. 2, a guide member 21 that promotes the flow of air from the exhaust inlet 14 to the inlet 15 is provided in the bypass space 20, and the bypass space 20 extends from the entire periphery of the exhaust inlet 14. The protruding portion 22 is provided so as to protrude inward. Therefore, at the time of construction, the exhaust inlet 14 of the main body 10a can be temporarily fixed by engaging with the protrusion 22.

  As shown in FIGS. 5 and 6, the inner diameter 15 a of the suction port 15 is set in a range larger than the short side dimension 14 a of the exhaust inlet 14 and smaller than the long side dimension 14 b of the exhaust inlet 14. In the present embodiment, the inner diameter 15a of the suction port 15 is 300 mm, the short side dimension 14a of the exhaust inlet 14 is 100 mm, and the thickness 20a of the bypass space 20 is 50 mm. Therefore, (the inner diameter 15a of the suction port 15−the short side dimension 14a of the exhaust inlet 14) / (the thickness 20a of the bypass space 20) = (300−100) / (50) = 4, and an appropriate range of 1.2 to It is within the range of 8.0. As shown in FIG. 2, the motor 17 for driving the impeller 18 of the centrifugal fan 16 is disposed on the upstream side of the impeller 18, and the motor 17 is covered with a cover 17c.

  In the exhaust apparatus 10 configured as described above, when the motor 17 is operated by a predetermined operation, the impeller 18 rotates and the centrifugal fan 16 operates to generate a suction force. Therefore, the kitchen shown in FIGS. The air in the vicinity of the electromagnetic cooker 1 is sucked from the suction grill 6 on the vertical wall surface 2, passes through the exhaust path 5, flows into the bypass space 20 from the exhaust inlet 14, and then enters the fan casing from the inlet 15. It flows into the interior 19 and is discharged from the exhaust port 13 to the outside. Therefore, smoke, steam, and the like generated from ingredients cooked in the electromagnetic cooker 1 are sucked from the suction grill 6 together with air and discharged from the exhaust port 13, so that ventilation in the vicinity of the electromagnetic cooker 1 can be performed. it can.

  In the exhaust device 10, as shown in FIG. 2, since the exhaust inlet 14, the suction port 15 and the centrifugal fan 16 are arranged in series in this order, from the exhaust inlet 14 to the centrifugal fan 16. The movement path of the exhaust flow is straight. For this reason, a pressure loss can also be suppressed to the minimum and the suction efficiency of the centrifugal fan 16 can be improved. In addition, since the distance from the exhaust inlet 14 to the inlet 15 can be minimized, the overall apparatus can be made slim and downsized.

  Further, since the bypass space 20 in which the air flow can be diffused is provided between the exhaust inlet 14 and the suction port 15, the air flow that has passed through the exhaust inlet 14 and entered the bypass space 20 is As shown in FIG. 14 described later, the air smoothly flows into the suction port 15 of the centrifugal fan 16 while diffusing the bypass space 20. Therefore, it is effective for improving the suction efficiency of the centrifugal fan 16.

  As described above (see FIG. 5), the inner diameter 15 a of the suction port 15 is set in a range larger than the short side dimension 14 a of the exhaust inlet 14 and smaller than the long side dimension 14 b of the exhaust inlet 14. As a result, the dimension of the suction port 15 (inner diameter 15a) is within the long side dimension 14b of the exhaust inlet 14, which is effective in reducing the size of the apparatus. Moreover, since the diameter of the centrifugal fan 16 can be increased within the range of downsizing, the ventilation performance required at the construction site and the quietness during operation can be ensured. Further, since the guide member 21 is provided in the bypass space 20, the movement of the air flow from the exhaust inlet 14 to the inlet 15 is promoted, and the suction efficiency of the centrifugal fan 16 can be increased.

  When a long and narrow duct having a rectangular cross section is used as the exhaust path 5 as in the present embodiment, the linear communication is made between the surrounding area of the exhaust inlet 14 and the surrounding area of the inlet 15. Even if a portion that does not occur is generated, the air flow that flows in from the exhaust inlet 14 diffuses into the bypass space 20 and is also guided to the portion of the suction port 15 that does not communicate linearly. Accordingly, an air flow flows into the entire suction port 15 and the suction efficiency of the centrifugal fan 16 is improved.

  On the other hand, as shown in FIG. 7, after releasing the lock mechanism 9 of the exhaust device 10, when the cover portion 10 b is opened like a door around the hinge 8, an internal mechanism such as a centrifugal fan 16 appears. And maintenance can be performed easily. Further, when the screw 17b screwed to the tip of the rotating shaft 17a of the motor 17 (see FIG. 7) is loosened and removed, the impeller 18 can be detached from the rotating shaft 17a of the motor 17 as shown in FIG. Therefore, cleaning of the impeller 18 itself and maintenance of a portion hidden by the impeller 18 can be easily performed.

  Furthermore, as shown in FIG. 9, in the exhaust apparatus 10, the centrifugal fan 16 can also be removed from the main-body part 10a. Thereby, since the cover part 10b and the centrifugal fan 16 are separated from the main body part 10a, the exhaust inlet 14 provided in the main body part 10a, the guide member 21 and the like appear, and the cleaning property and the maintenance property are good. Further, in the exhaust device 10, an oil recovery portion 23 is provided at the bottom of the circular guide member 21, and an oil drain pipe 24 that communicates with an oil drain hole (not shown) provided at the lowermost portion thereof. Accordingly, oil droplets and the like adhering to the inner surface of the guide member 21 flow down into the oil recovery unit 23 along the oil droplets, and are then discharged through the oil drain pipe 24. A receiving tray (not shown) for collecting oil flowing down can be provided at the lower portion of the oil drain pipe 24.

  Further, in the exhaust device 10, as shown in FIG. 10, the oil droplets adhering to the motor cover 17 c flow down along the same and accumulate at the bottom of the guide member 21. In this case, as shown in FIG. 11, if the motor 17 is provided with an inclined cover 17g, the air colliding with the cover 17g can be guided to the suction port 15 of the centrifugal fan (not shown), so that suction efficiency is increased. It is effective in improving Further, the cover 17g also exhibits a function of smoothly flowing down the oil droplets attached thereto to the bottom of the guide member 20.

  FIG. 12 shows an exhaust device 40 according to another embodiment. Since the exhaust device 40 has the bypass space 20, the air flow that flows in from the exhaust inlet 14 bypasses the bypass space 20 and is not in linear communication with the exhaust inlet 14 at the suction port 15. It is effective for improving the suction efficiency. In addition, when the guide member is not provided in the bypass space 20, depending on the situation, the air flow flowing in from the exhaust inlet 14 may spread to the corner portion and generate the vortex R. In such a case, the airflow that has passed through the hatched area Z1 at both end portions of the exhaust inlet 14 is obstructed by the vortex R and cannot smoothly flow into the hatched area Z2 at the upper and lower portions of the suction port 15, and the fan is originally provided. The suction efficiency may not be obtained.

  On the other hand, since the exhaust device 10 shown in FIG. 13 includes the guide member 21 in the bypass space 20, the airflow flowing into the bypass space 20 from the exhaust inlet 14 does not spread to the corner C. No vortices are generated. Accordingly, in FIG. 13, the airflow that has passed through the hatched area Z1 at both ends of the exhaust inlet 14 smoothly flows into the hatched area Z2 at the upper and lower portions of the suction port 15, and high suction efficiency can be obtained.

  As described above, in the exhaust device 10, as shown in FIG. 14, the bypass space 20 is provided, and the circular guide member 21 is disposed in the bypass space 20, so that the bypass space is provided from the exhaust inlet 14. A large amount of the air flow that has flowed into 20 can be caused to flow into the suction port 15 of the centrifugal fan 16, so that the suction efficiency can be improved. In addition, the effect of inducing detoured air to a region that does not communicate linearly with the exhaust inlet 14 at the suction port 15 is increased, and exhaust efficiency is improved.

  Thus, by providing the bypass space 20 in the exhaust device 10, the air flow can be bypassed to a region that is not in linear communication with the exhaust inlet 14 at the suction port 15. By providing the guide member 21, it is possible to prevent the air flow from entering the corner portion C. Further, since the guide member 21 has a circular shape, it is possible to obtain an effect that the air flow can be efficiently guided to a region that is not in linear communication with the exhaust inlet 14 at the suction port 15. Since the guide member 21 is not limited to a circular one, a polygonal guide member 21a can be provided as shown in FIG.

  Moreover, as shown in FIG. 15, the exhaust apparatus 10 has the several vane 11a which guides the exhaust_gas | exhaustion discharged | emitted from the exhaust port 13 to the direction away from the outer wall surface 2a of a building in the exhaust port 13 in the bottom face. A guide member 11 is provided. Therefore, it is possible to prevent the outer wall surface 2a from being contaminated by steam, smoke, oil droplets, etc. contained in the air flow discharged from the exhaust port 13. The antifouling means for the outer wall surface 2a is not limited to the guide member 11, and a member for guiding the air flow discharged from the exhaust port 13 away from the outer wall surface is provided on the upstream side or the downstream side of the exhaust port 13. Thus, the same antifouling effect can be obtained.

  On the other hand, if a backflow prevention means such as a check damper that opens and closes the exhaust port 13 due to a pressure change caused by the operation and stop of the exhaust device 10 is provided, intrusion of outside air when the exhaust device 10 is stopped can be prevented. Can do. In this case, if the blade member constituting the check damper has a function of guiding the air flow discharged from the exhaust port 13 during the operation of the exhaust device 10 in a direction away from the outer wall surface, the outer wall surface is prevented from being damaged. An effect can also be obtained.

  Next, in the exhaust device 50 shown in FIG. 16, an outside air introduction path 27 is provided between the back surface and the outer wall surface 2 a, and is partitioned from the exhaust path 5 above the exhaust path 5 passing through the vertical wall surface 2. In this state, an air supply path 28 communicating with the outside air introduction path 27 is provided. With such a configuration, smoke or steam generated from the electromagnetic cooker 1 can be enclosed and discharged by the outside air introduced via the outside air introduction path 27 and the air supply path 28. For this reason, it is possible not only to suppress a decrease in room temperature in winter, but also to prevent a phenomenon in which the door becomes difficult to open due to negative pressure in the room. Moreover, in the case of the building which employ | adopted the 24-hour ventilation system, ventilation near the electromagnetic cooker 1 can be performed efficiently, maintaining a ventilation balance favorable.

  In this case, as shown in FIG. 16, it is desirable to provide an inclined plate-shaped flow guide member 32 at the boundary portion between the exhaust path 5 and the air supply path 28 in the supply / exhaust grill 31. As a means for introducing the outside air into the room, an air supply port 33 may be provided above the exhaust device 10 as shown in FIG.

  On the other hand, as shown in FIG. 18, if the motor is covered with a cover having an inclined surface 17 d on the exhaust inlet 14 side, air colliding with the inclined surface 17 d can be smoothly guided to the centrifugal fan 16. It is effective in improving In addition, as shown in FIG. 19, if the outer peripheral surface of the cover 17e is arranged so as to be all inclined, oil droplets, water droplets, and the like attached thereto can smoothly flow down to the bottom of the guide member. Furthermore, as shown in FIG. 20, if the motor 17 is provided with a bowl-shaped cover 17f, oil droplets, water droplets, and the like adhering thereto can be smoothly caused to flow down to the bottom of the guide member as described above.

  Next, the arrangement of the exhaust device 10 will be described with reference to FIG. Since the arrangement | positioning form of the exhaust apparatus 10 is not specifically limited, as shown to Fig.21 (a), it can arrange | position to the outer wall surface 2a of the vertical wall surface 2 of the front surface or side surface of the electromagnetic cooker 1. FIG. Moreover, in the case of the facing kitchen shown in FIG.21 (b), the suction grill 6 can be provided in the front wall of the electromagnetic cooker 1, and the duct 34 can be arrange | positioned between the exhaust apparatus 10 arrange | positioned in the outer wall surface 2a. . In this case, since the opening part opened in the outer wall surface 2a in the state connected with the duct 34 becomes a vertically long rectangle, the exhaust inflow port 14 of the exhaust apparatus 10 is also arrange | positioned in a vertically long direction. Furthermore, in the case of the island kitchen shown in FIG. 21 (c), the suction grill 6 can be provided in front of the electromagnetic cooker 1, and the duct 35 can be provided between the exhaust device 10 arranged on the outer wall surface 2a. .

  The exhaust device of the present invention can be widely used as a component device of a ventilation system such as a kitchen of a general household or a kitchen of a restaurant.

It is a figure which shows the cooking appliance vicinity which installed the exhaust apparatus which is embodiment of this invention. It is the sectional view on the AA line in FIG. (A) is a front view of the exhaust apparatus shown in FIG. 2, (b) is a side view of the exhaust apparatus. (A) is a bottom view of the exhaust device shown in FIG. 3, and (b) is a view showing a wind direction plate constituting the exhaust device. FIG. 4 is a partially cutaway front view of the exhaust device shown in FIG. 3. FIG. 3 is a schematic view of a schematic structure inside the exhaust device shown in FIG. 2. It is a perspective view which shows the exhaust apparatus shown in FIG. 5 in a cover open state. It is a perspective view which shows the exhaust apparatus shown in FIG. 7 in an impeller detached state. It is a perspective view which shows the exhaust apparatus shown in FIG. 8 in a centrifugal fan detached state. It is sectional drawing which shows typically the internal structure of the exhaust apparatus shown in FIG. It is a schematic diagram which shows the internal structure of the exhaust apparatus which is other embodiment. It is a schematic diagram which shows the movement state of the airflow in the exhaust apparatus which is other embodiment. It is a schematic diagram which shows the movement state of the airflow in the exhaust apparatus shown in FIG. It is a schematic diagram which shows the arrangement | positioning state of the guide member in the exhaust apparatus shown in FIG. It is a schematic diagram which shows the function of the wind direction board in the exhaust apparatus shown in FIG. It is a vertical sectional view showing an exhaust device according to another embodiment. It is a vertical sectional view showing another construction example of the exhaust device shown in FIG. (A) is a perspective view which shows typically the exhaust apparatus which is other embodiment, (b) is a schematic perspective view which shows the motor part which comprises the said exhaust apparatus. It is a perspective view which shows other embodiment regarding motor arrangement | positioning. It is a fragmentary sectional view which shows the exhaust apparatus which is other embodiment. It is a horizontal sectional view which shows the arrangement | positioning state of an exhaust apparatus and an electromagnetic cooker.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electromagnetic cooker 2 Vertical wall surface 2a Outer wall surface 3 Exhaust port 4 Opening part 5 Exhaust path 6 Suction grill 6a Rectification vane 7 Screw 8 Hinge 9 Lock mechanism 10, 40, 50 Exhaust device 10a Main body part 10b Cover part 11 Induction member 11a Vane 12 Lid 13 Exhaust port 14 Exhaust inlet 14a Short side dimension 14b Long side dimension 15 Suction port 15a Inner diameter 16 Centrifugal fan 17 Motor 17a Rotating shaft 17b Screw 17c, 17e, 17f, 17g Cover 17d Inclined surface 18 Impeller 19 Fan casing DESCRIPTION OF SYMBOLS 20 Detour space 20a Detour space thickness 21,21a Guide member 22 Protrusion part 23 Oil recovery part 24 Oil drain pipe 26 Work area 27 Outside air introduction path 28 Supply air path 31 Supply / exhaust grill 32 Current guide member 33 Supply port 34, 35 Duct C Corner R R Vortex Z1, Z2 Shaded area

Claims (8)

In order to ventilate the vicinity of the cooker through an exhaust passage having an opening on the outer wall surface of the building, which communicates with an exhaust port provided in a vertical wall surface around the cooker arranged in the building. An exhaust device attached to the
An exhaust inlet having a rectangular cross section connected to the opening, and a centrifugal fan that sucks air through a suction port arranged on the downstream side in communication with the exhaust inlet,
The exhaust inlet, the suction port and the centrifugal fan are arranged in series,
An air supply path for introducing outside air is provided above the exhaust path that penetrates the vertical wall surface in a state partitioned from the exhaust path ,
Between the exhaust inlet and the suction port, a bypass space in which an air flow can be diffused is provided,
In the bypass space, a guide member that promotes the flow of air from the exhaust inlet to the suction port is provided,
An exhaust system characterized in that the shape of the guide member viewed from the centrifugal fan side is a closed curve . Wherein the inner diameter of the suction port, the exhaust inlet of the exhaust device according to claim 1, wherein a short side dimension greater than and the exhaust stream within a small range than the long side dimension of the inlet. The exhaust system according to claim 2 , wherein (the inner diameter of the suction port-the short side dimension of the exhaust inlet) / (thickness of the bypass space) = 1.2 to 8.0. The exhaust device according to any one of claims 1 to 3, wherein the guide member has a shape that guides an air flow to a region that is not in linear communication with the exhaust inlet at the suction port. The exhaust device according to any one of claims 1 to 4 , wherein an installation direction of the exhaust inlet with respect to the suction port is rotatable within a range of at least 0 to 90 degrees. A motor for driving the impeller of the centrifugal fan is disposed on the upstream side of the impeller, and flow guide means is provided for guiding air colliding with the motor or its cover to the suction port of the centrifugal fan. The exhaust device according to any one of 5 . The exhaust device according to claim 6, wherein an inclined portion for avoiding accumulation of oil droplets or water droplets is provided on an upper portion of the flow guide means. The exhaust device according to any one of claims 1 to 7 , wherein an oil recovery portion is provided at a bottom portion of the guide member.

Images