JP2008057838A - Range hood and its adjustment method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a range hood and its adjustment method having high collection efficiency even under disturbance wind (cross wind). <P>SOLUTION: This range hood disposed at an upper part of a heating cooker comprises a suction opening opposed to the heating cooker for sucking the air, a discharge opening formed at an outer side of the suction opening and forming air curtains at an outer side at least in two directions observed from the suction opening, by discharging the air downward, and a forming means for selectively forming only the air curtain at a side close to the disturbance wind, of the air curtains in two directions. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a range hood and an adjustment method thereof, and more particularly, to a range hood capable of forming an air curtain and an adjustment method thereof.

A range hood is installed above a cooking device such as a cooking stove installed in a kitchen, and oil smoke and odors rising from the cooking device are collected by suction. Recently, not only conventional kitchens where cooking devices are installed along walls, but also so-called island kitchens and peninsula kitchens where cooking devices are installed away from walls have begun to become popular. Yes.
In conventional kitchens, even if the distance between the range hood and the cooking device is increased to 800 mm or more based on regulations of the Fire Service Law, oil smoke and odors are difficult to diffuse due to the walls, so It was relatively easy to collect. However, in the island type kitchen and the peninsula type kitchen, the surroundings are open, so that the oil smoke and odor are easily diffused, and the collection of the oil smoke and odor becomes difficult. Therefore, in the island type kitchen and the peninsula type kitchen, a range hood having a higher collection performance than before has been required.

Here, “air curtain” has been proposed as a technique for improving the collection performance of the range hood. (See Patent Documents 1 and 2)
However, the technique disclosed in Patent Document 1 collects oil smoke and odors that have risen up to the vicinity of the range hood as if wrapped in an air curtain. For this reason, if there is a turbulent wind (crosswind) before reaching the vicinity of the range hood, diffusion cannot be prevented, and there is a problem in the collection performance when there is a turbulent wind (crosswind).

In addition, the technique disclosed in Patent Document 2 is provided with an air curtain in three directions (side without a wall) of the range hood, and encloses the oil smoke and odor with the wall to prevent its diffusion, thereby collecting performance. It is going to improve. However, when there is a turbulent wind (cross wind), if the strength of the air curtain is equal in all three directions in order to block the turbulent wind, the wind flow will be disturbed and oil smoke and odor will diffuse. There was a problem that.
JP 2002-228222 A Japanese Patent Laid-Open No. 10-160222

  This invention provides the range hood which has a high collection rate, and its adjustment method, even when there exists a disturbance wind (cross wind).

According to one aspect of the invention,
A range hood installed above the heating cooker,
A suction port that faces the heating cooker and sucks air;
A discharge port that is provided outside the suction port and forms an air curtain at least in two directions when viewed from the suction port by discharging air downward;
Forming means for selectively forming only the air curtain on the side close to the disturbance wind among the air curtains in the two directions;
A range hood characterized by comprising:

According to another aspect of the present invention,
A suction port that faces the heating cooker and sucks air and is provided outside the suction port, and discharges air downward to form an air curtain at least in two directions as viewed from the suction port. A method for adjusting the range hood, which has a discharge port and is installed above the heating cooker,
A range hood adjustment method is provided, wherein only the air curtain on the side close to the turbulent wind among the air curtains in the two directions is selectively formed.

  ADVANTAGE OF THE INVENTION According to this invention, even when there exists a disturbance wind (cross wind), the range hood which has a high collection rate, and its adjustment method are provided.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Drawing 1 is a mimetic diagram for explaining the range hood concerning a first embodiment of the present invention.

  FIG. 2 is a schematic view taken along line AA in FIG.

  As shown in FIG. 1, the range hood 1 is provided above the cooking device IH and includes a hood main body 2 and a suction fan 4 inside the hood main body 2.

  The hood main body 2 includes a lower part 2a having a substantially rectangular cross section, an intermediate part 2b extending so as to narrow upward from the lower part 2a, and an upper part 2c disposed on the intermediate part. Is stored. The inner space 2d of the lower part 2a and the intermediate part 2b constitutes a suction air passage, and the air therein is sucked by the suction fan 4. The suction fan 4 is controlled by a rotation control means (not shown), for example, by controlling the frequency in the case of an AC motor, the voltage in the case of a DC motor, etc., and changing the rotation speed of the motor to adjust the suction wind speed or air volume. Be able to. The hood main body 2 may be installed in contact with the wall, or may be installed at a location away from the wall of the room like an island type kitchen.

  An auxiliary fan 34 is connected to each of the discharge ports 14b, 14c, and 14d via an air passage 32. The auxiliary fan 34 is accommodated in the lower portion 2a of the range hood body 2, and may be, for example, a cross flow fan. The auxiliary fan 34 can be controlled by a rotation control means (not shown), for example, by controlling the frequency in the case of an AC motor, the voltage in the case of a DC motor, and the like, thereby changing the number of rotations of the motor and adjusting the wind speed or air volume. It can be done. However, the adjustment of the wind speed or the air volume is not limited to this, and it is sufficient that the air speed or the air volume of the air discharged from the discharge ports 14b, 14c, and 14d can be varied. For example, it is possible to vary the cross-sectional area of the air passage 32 by a throttle means (not shown), or provide a hole (not shown) communicating with the internal space 2d in the air passage 32 and adjust the cross-sectional area of this hole to leak. The amount can be varied. Further, the adjustment of the air speed or the air volume may be performed manually by a cook or automatically performed by a control device (not shown).

  A rectifier 36 that rectifies the air sent from the auxiliary fan 34 is provided in the air passage 32. An example of the rectifier 36 is one in which the cross section of the rectification unit has a honeycomb structure. An angle adjusting means (not shown) is provided in the vicinity of the outlets of the discharge ports 14b, 14c, and 14d so that the discharge angle can be adjusted. The angle adjusting means can be, for example, a louver. The adjustment of the discharge angle may be performed manually by the cook or may be performed automatically by a control device (not shown).

  For convenience of explanation, the case where a plurality of auxiliary fans 34 are provided to individually adjust the wind speed or air volume has been described. However, the number of auxiliary fans is reduced (for example, as one auxiliary fan) and the air path is branched. Adjusting the air speed or air volume individually for a plurality of air passages while reducing the number of auxiliary fans 34 by changing the distribution amount of the air flow at the branching portion or changing the cross-sectional area of the air passage after branching. You can also do it. In addition, adjusting the wind speed or air volume can also eliminate the air curtain on the desired surface, including blocking the air to be discharged.

  As shown in FIG. 2, a rectangular lower surface member 6 is provided on the lower portion 2 a of the hood body 2. The lower surface member 6 is provided with a lower surface 6b having a central hole 6a. A rectifying plate 8 is provided inside the central hole 6 a, and a suction port 10 for sucking air is provided between the lower surface member 6 and the rectifying plate 8. The suction port 10 has an annular shape and is provided along the periphery of the lower surface member 6, and the cooker side 12a and the back side 12b are formed wider than the other sides, that is, the left side 12c and the right side 12d.

  Between the peripheral edge 6c of the lower surface member 6 and the suction port 10, there are provided discharge ports 14b, 14c and 14d for discharging an air flow toward the heating cooker IH, that is, air for forming an air curtain. The discharge ports 14b, 14c, and 14d extend in the circumferential direction around a portion of the suction port 10. The suction port 10 may extend linearly, may extend curvedly, or may be a combination thereof. In this embodiment, it consists of a back side discharge port 14b provided on the back side, a left side discharge port 14c provided on the left side, and a right side discharge port 14d provided on the right side.

Next, the operation of the range hood 1 will be described with reference to FIG.
Oil smoke or odor rising from the cooking device IH is sucked from the suction port 10 together with the air in the suction area 50 by the action of the suction fan 4. At the same time, air is discharged downward from any of the discharge ports 14b, 14c, and 14d by the action of the auxiliary fan 34, and the air curtain 52 is formed on the side where the disturbance wind (cross wind) W is present. The air curtain 52 blocks disturbance wind (cross wind) W, and separates the suction area 50 and the external area 51.

  Specifically, the air sent out by the action of the auxiliary fan 34 is rectified by the rectifier 36 in the air passage 32 and then discharged downward from any one of the discharge ports 14b, 14c, and 14d. The air curtain 52 is formed on the side where the turbulent wind (cross wind) W is present by the discharged air. The air curtain 52 that has reached the vicinity of the upper surface of the heating cooker IH and the wind speed has fallen is pulled toward the suction area 50 by the negative pressure of the suction area 50, and together with the air containing oil smoke and odor in the suction area 50, the suction port 10 is discharged.

  Here, it may be necessary to adjust the strength (wind speed or air volume) and the discharge angle of the air curtain 52 depending on the strength of the turbulent wind (cross wind) W, the installation environment, the taste of the cook, and the like. The necessity of adjusting the strength (wind speed or air volume) of the air curtain 52 and adjusting the discharge angle will be described later.

  As described above, the strength (wind speed or air volume) of the air curtain 52 is adjusted by changing the motor speed of the auxiliary fan 34, the cross-sectional area of the air passage 32, the cross-sectional area of the hole communicating with the internal space 2d, and the like. It is also possible to form only the air curtain 52 in a specific direction. The adjustment of the discharge angle of the air curtain 52 can also be performed by angle adjusting means (not shown) (for example, a louver) as described above.

  The direction in which the turbulent wind (cross wind) W is present and its intensity may be determined and sensed by the user or the cooker. ) Detection means may be provided for sensing. Further, the adjustment of the strength (wind speed or air volume) of the air curtain 52 and the adjustment of the discharge angle of the air curtain 52 may be performed manually by the cook, or the wind pressure detected by the disturbance wind (cross wind) detecting means described later. It may be performed by a control device based on detected values such as wind speed and wind speed. In addition, when the direction and intensity of the turbulent wind (cross wind) W can be predicted in advance, these can be adjusted in advance when the range hood 1 is manufactured or installed. For example, when the system kitchen including the range hood 1 is laid out, the direction of the disturbance wind W is often known from the positions of windows, doors or air conditioner outlets provided around the system kitchen. Therefore, the direction of the disturbance wind W can be predicted based on such layout information, and the formation direction and strength of the air curtain 52 can be adjusted in advance.

  As described above, the range hood 1 according to the present invention, which can adjust the strength (wind speed or air volume) of the air curtain 52, adjust the discharge angle, and form the air curtain only in a specific direction, has a disturbance wind (side wind) W. Therefore, it is possible to take appropriate measures against the installation environment and the like, so that the collection rate of oil smoke and odors is high, and low power consumption (energy saving) can be achieved. Furthermore, since it is sufficient to form the air curtain only in a specific direction, simple control can be achieved without complicated control of a plurality of directions. And workability and cleanability are good compared with what discharges air from the heating cooker IH side, and forms an air curtain. This is because if a discharge port of the air curtain is provided on the heating cooker IH side, cooking dust falls on the discharge port or the cooking space becomes narrow.

Next, the influence of disturbance wind (cross wind) W will be described.
In the place where the range hood 1 is installed, there may be a disturbance wind (cross wind) W such as an air flow caused by an air conditioner, an air flow caused by movement of a person, or an external air flow from a window. If there is such a disturbing wind (cross wind) W, the flow of oil smoke and odors rising from the cooking device IH is disturbed, and the collection rate is remarkably lowered.
In general, in order to block this disturbance wind (crosswind) W and improve the collection rate, it is considered that the strength (wind speed or air volume) of the air curtain surrounding the range hood 1 should be increased uniformly. It is done.

Here, as a result of the examination, the present inventor encloses the suction area 50 with an air curtain and uniformly increases the strength (wind speed or air volume) of the air curtain when there is a turbulent wind (cross wind) W. However, the knowledge that the collection rate would rather decrease was obtained.
FIG. 3 is a schematic diagram for conceptually explaining the formation state of the air curtain. FIG. 3A shows a case where air curtain 54 is formed on three surfaces by discharging air from three discharge ports 14b, 14c, and 14d when there is a turbulent wind (cross wind) W. FIG. In this specific example, the remaining one surface is a surface on which the cook stands so that the air curtain 54 is not formed. FIG. 3B shows a case where the air curtain 52 is formed only in the direction (discharge port 14 c) where the turbulent wind (cross wind) W is present when the turbulent wind (cross wind) W is present.
FIG. 4 is a graph for explaining the relationship between the number of forming surfaces of the air curtain and the collection rate. Note that the collection rate was the CO ₂ capture rate, the details such as the measurement method described below. The bar graph on the left side of FIG. 4 shows the case where the air curtain 52 is formed only on one surface (the direction in which the turbulent wind (cross wind) W is present), and the bar graph on the right side forms the air curtain 54 on three surfaces. This is the case. The left side of each bar graph shows when the disturbance wind (crosswind) W is relatively weak (0.3 m / sec near the pan), and the right side shows when the disturbance wind (crosswind) W that is relatively likely to occur in a normal living environment is considered. (0.45 m / sec near the pan).

As can be seen from FIG. 4, the case where the air curtain 52 is formed on only one surface (the direction in which the turbulent wind (cross wind) W is present) is captured rather than the case where the air curtain 54 is formed on the three surfaces. The collection rate is high. It can also be seen that this becomes more prominent as the disturbance wind (crosswind) W becomes stronger. This is because if there is an air curtain on the surface other than the direction in which the turbulent wind (cross wind) W is present, the updraft is disturbed in the vicinity of the upper surface of the heating cooker IH, and instead the CO ₂ gas rising from the pan (collection rate) This is considered to be because the measurement object) is pushed out to the external region 51.

  FIG. 5 is a graph for explaining the relationship between the wind speed (intensity) of the air curtain and the collection rate. In the figure, when “1 surface” is the air curtain 52 formed only on one surface (the direction in which the disturbance wind (cross wind) W was present), “3 surfaces” is the air curtain 54 formed on the 3 surfaces. Is the case. As can be seen from FIG. 5, when the air curtain 52 is formed only on one surface (the direction in which the turbulent wind (cross wind) W was present), the high collection rate is stable even if the wind speed (strength) of the air curtain is increased. Can be maintained. On the other hand, when the air curtain 54 is formed on the three surfaces, the collection rate changes due to the wind speed of the air curtain and is unstable, and if the wind speed is increased too much, the collection rate is lowered. Therefore, when the air curtain 54 is formed on the three surfaces, the wind speed (strength) of the air curtain cannot be increased, and there is a problem in the blocking performance when there is a relatively strong disturbance wind (cross wind) W. .

  In FIGS. 4 and 5, the disturbance wind (cross wind) W is blown from the left side (left side in FIG. 1) as seen from the cook as shown in FIG. 3B.

Next, the method for measuring the CO ₂ collection rate described above will be described.
FIG. 6 is a schematic diagram for explaining a CO ₂ collection rate measuring apparatus.
The apparatus shown in FIG. 6 is an apparatus in which the air curtain discharge unit used in the first embodiment of the present invention is mounted on the heating cooker IH and the range hood. The air curtain discharge part is attached to three places of the range hood. By controlling the rotation speed of a cross flow fan (not shown) provided in the air curtain discharge section, the strength (wind speed or air volume) of the air curtain can be varied. In addition, a louver (not shown) is provided near the outlet of the air curtain discharge section so that the discharge angle can be adjusted.

On the stove of the cooking device IH, a hot pot is placed. A cross wind generator is provided on one side of the range hood where the air curtain discharge unit is located so that the cross wind can be supplied to the pan. A ring-shaped tube (not shown) is provided on the edge of the pan, and a CO ₂ gas cylinder is connected to the ring-shaped tube via a flow rate regulator. A plurality of holes for discharging CO ₂ gas are provided in the ring-shaped tube, and the discharged CO ₂ gas rises with the steam of the hot water in the pan.

CO ₂ concentration in the duct and (duct CO ₂ concentration) was measured at a point of the heating cooker from the edge of the IH from 1m about separation bed of about 1m height (indoor CO ₂ concentration). As a CO ₂ concentration measuring device, a Vaisala CO ₂ converter GMT 222 was used. The distance from the upper surface of the cooking device IH to the lower surface of the range hood is about 940 mm, and the distance from the center of the pan to the end face of the cross wind generator is about 900 mm. As for the discharge port size of the cross wind generator, the height is about 300 mm from the height equivalent to the top surface of the cooking device IH, and the depth is about 600 mm.

As a measuring method, first, the hot water in the pan is boiled by the heating cooker IH, and the suction fan of the range hood is operated. Next, CO ₂ gas was supplied from a CO ₂ gas cylinder at a flow rate of 12.5 liters / minute, and was discharged from a hole in a ring-shaped tube provided at the edge of the pan. Then, the duct CO ₂ concentration of CO ₂ concentration in the duct at this time. Moreover, while forming an air curtain, the cross wind which supplies 0.3 m / sec or 0.45 m / sec in the vicinity of the pan when there was no air curtain was supplied. Then, the indoor CO ₂ concentration (indoor CO ₂ concentration) at this time was measured.

In addition, CO ₂ gas is directly supplied from the CO ₂ gas cylinder through the flow controller at a rate of 12.5 liters / minute in advance, and the indoor CO ₂ concentration (ppm) at that time is determined from the measured value of the CO ₂ concentration in the duct. ) Was taken as the directly supplied CO ₂ concentration (ppm).
Using these measured values, the collection rate was calculated by the following equation.

ここで、Ｈは排気風量（ｍ^３／時）、Ｃは捕集率（％）、ρ１は直接供給ＣＯ_２濃度（ｐｐｍ）、ρ２はダクト内ＣＯ_２濃度（ｐｐｍ）、ρ３は室内ＣＯ_２濃度（ｐｐｍ）である。
次に、本実施形態に係るレンジフードの変型例について説明をする。
図７〜図１０は、本変型例に係る図１におけるＡ−Ａ矢視模式図である。図２に関して説明したものとは、吐出口の形状や配置が異なるほかは同様の構造をしているため、異なる部分のみ説明をする。

Here, H is the exhaust air volume ^{(m 3} / h), C is the collection rate (%), ρ1 is directly supplied CO ₂ concentration (ppm), [rho] 2 is duct CO ₂ concentration (ppm), [rho] 3 indoor CO ₂ Concentration (ppm).
Next, the modified example of the range hood which concerns on this embodiment is demonstrated.
7 to 10 are schematic views taken along the line AA in FIG. 1 according to this modification. Since the structure is the same as that described with reference to FIG. 2 except that the shape and arrangement of the discharge ports are different, only the different parts will be described.

  7 differs from that shown in FIG. 2 in that the discharge port 57 is integrally provided. In this way, a wider air curtain can be formed. However, the air path leading to the discharge port 57 can be appropriately divided. For example, the air path leading to the integrated discharge port 57 is divided into three parts, that is, the back side of the range hood 1 (lower side in FIG. 7) and the left and right sides, and the wind speed in each of the divided air paths. And the air volume can be controlled independently. In this way, it is possible to form only the air curtain in the direction with the disturbance wind (cross wind) W.

  The example shown in FIG. 8 is a modified example suitable for use when the range hood 1 is installed along a wall as in a conventional kitchen, for example. If the range hood 1 is installed along the wall, it is not always necessary to form an air curtain on the wall-side surface and the surface on which the cook stands facing the wall-side surface. This is because the disturbing wind (cross wind) W is blocked by the wall and the cooker, and the suction area 50 and the external area 51 are separated. Moreover, if the air curtain directly hits the cooker, it may cause discomfort. Therefore, in the one shown in FIG. 8, the discharge ports 58a and 58b are provided only on the left and right two sides. However, even when the range hood 1 is installed along the wall, a discharge port may be provided on both the surface on which the wall is located and the surface on which the cook stands, or on either of them. .

  What is shown to Fig.9 (a) is used for the Peninsula type kitchen illustrated in FIG.9 (b), for example. In the case of a peninsula type kitchen, there will be a wall on the left side or the right side (left side in the case of FIG. 9B) as seen from the cook. Therefore, even in this case, it is not always necessary to form an air curtain on the wall side surface and the surface on which the cook stands. This is because the disturbing wind (cross wind) W is blocked by the wall and the cooker, and the suction area 50 and the external area 51 are separated. Moreover, if the air curtain directly hits the cooker, it may cause discomfort. Therefore, in the case shown in FIG. 9A, the discharge ports 59a and 59b are provided only on the other two surfaces. However, even when the range hood 1 is provided in the peninsula-type kitchen, the discharge port can be provided on both or one of the surface on which the wall is located and the surface on which the cook stands.

  Further, in this modified example, as shown in FIG. 9A, the discharge ports 59a and 59b are provided with wide regions 60 whose width in the direction perpendicular to the circumferential direction of the range hood is widened. Yes. The wide regions 60 preferably have the same contour and are provided at equal intervals. For example, the width of the constant width region (portion other than the wide region in the discharge port) is 15 to 40 mm, the width of the wide region is 30 to 130 mm, and the circumferential length of the wide region is about 15 to 40 mm. it can. Although the shape of the wide region 60 shown in FIG. 9A is a rectangle, the shape of the wide region 60 is not limited to this, and the contour line can be constituted by an arbitrary straight line or curve. For example, a triangle or a polygon may be used, and those with rounded corners may be used. Further, the contour line can be constituted by a sine curve. Moreover, although the wide area | region 60 shown to Fig.9 (a) is provided in the longitudinal direction one side of the discharge ports 59a and 59b, it can also be provided so that it may oppose both sides.

Next, the operation and effect of the wide region 60 will be described.
When the outline of the wide area is a triangle, the initial vortex generated by the air discharged from the discharge ports 59 a and 59 b is destroyed by the outline of the wide area 60. As a result, compared with the case where the wide region 60 is not provided, the mutual movement action between the air curtain and the air on both sides thereof (the suction region 50 and the external region 51) is weakened, and the reach distance of the air curtain is reduced. It can be made longer.

  In addition, a region called a potential core having the same speed as the discharge speed at the discharge ports 59a and 59b is formed in the air curtain. And in the part in which the wide area | region 60 was provided, the area | region of the potential core is extended in the downstream direction (direction of the heating cooker IH) rather than the part in which the wide area | region 60 is not provided, and the air around it is also downstream. Be dragged. Thereby, the propulsive force of the air curtain toward the downstream direction is increased, and the reach of the air curtain can be increased and the strength can be increased.

  As a result, the blocking performance between the suction region 50 and the external region 51 is ensured, and the collection rate can be improved. In addition, the range hood 1 according to the present invention suppresses the influence of the turbulent wind (crosswind) W on the collection rate even when there is a turbulent wind (crosswind) W as compared with the case where the wide region 60 is not provided. can do. Moreover, even if the strength (wind speed or air volume) of the air curtain is the same, since the reach distance of the air curtain is long, the distance between the range hood 1 and the cooking device IH can be increased. In other words, if the distance between the range hood 1 and the cooking device IH is the same, the strength (wind speed or volume) of the air curtain can be reduced, and thereby the auxiliary fan for discharging the air flow 34 can also be reduced in size and power.

  In addition, when the wide region has a triangular outline and the wide regions 60 are provided at equal intervals with the same contour, the vortex state broken by the wide regions 60 is equivalent, so that the air flow is disturbed. Thus, the reach of the air curtain can be further increased.

  Moreover, when each wide area | region 60 is provided at equal intervals with the same outline mutually, since the extension state to the downstream direction (direction of the heating cooker IH) of a potential core becomes equivalent, disturbance of an air flow is prevented, The reach of the air curtain can be further increased.

  In addition, when a plurality of wide regions 60 are provided, it is possible to increase the reach of the air curtain over a wide range, compared to the case where only one wide region 60 is provided.

  The provision of the wide region 60 is not limited to the discharge ports 59a and 59b shown in FIG. For example, it can be provided at each of the discharge ports of FIGS. 2, 7, and 8 described above, or can be provided at discharge ports having other shapes and arrangements.

  The thing shown to Fig.10 (a) is used for the island type kitchen illustrated to FIG.10 (b). In the case of an island type kitchen, as shown in FIG. 10B, the range hood 1 is not installed along the wall. Therefore, in this case, the air curtain on the surface on which the cook stands is not necessarily required. This is because the disturbing wind (cross wind) W is blocked by the cook, and the suction area 50 and the external area 51 are separated. Moreover, if the air curtain directly hits the cooker, it may cause discomfort. For this reason, in the case shown in FIG. 10A, the discharge ports 61a, 61b, 61c are provided on the other three surfaces. However, even when the range hood 1 is provided in the island kitchen, the discharge port can also be provided on the surface on which the cook stands.

Next, another specific example of the range hood according to the present embodiment will be described.
FIG. 11 is a perspective view for explaining the external appearance of the range hood. Since the range hood 1 itself is the same as that described in FIG. 1, the same elements as those described above with reference to FIG.

  An operation switch 62 and a changeover switch 63 are provided on the cooker side surface of the lower part 2a. The operation switch 62 is a basic operation of the range hood 1 for performing “on / off” of the suction operation, “switching of strength” of the suction operation, “on / off” of the hand illumination, “setting” of the operation timer, and the like. Is. The changeover switch 63 is for performing “switching of the forming direction, switching of the strength” and the like of the air curtain. Further, the operation switch 62 and the changeover switch 63 are electrically connected to a control means (not shown), and the operation and adjustment of each part are performed by the operation of the operation switch 62 and the changeover switch 63. For convenience of explanation, the case where the operation switch 62 and the changeover switch 63 are provided separately has been described, but they may be integrated. The contents of the operation switch 62 and the changeover switch 63 described above are merely examples, and the contents can be changed as appropriate.

  FIG. 12 is a schematic diagram for explaining the operation switch 62a and the changeover switch 63a. FIG. 12A is a schematic diagram for explaining the operation switch 62a. The operation switch 62a includes a switch 64a for “turning off” the suction operation, a switch 65a for “switching on or off” the suction operation, a switch 66a for “turning on / off” the hand illumination, A switch 67a for “setting” the operation timer is provided.

  For example, if the switch 65a is pressed once, the suction fan 4 is activated and the suction operation of the range hood 1 starts. If the switch 64a is pressed, the suction fan 4 is stopped. Can be. As shown in the drawing, the switch 65a also performs switching in three stages of “strong, medium, weak”. By pressing one of “strong, medium, weak” of the switch 65a, the suction fan 4 is switched. The strength of the suction operation can be switched. Further, the hand illumination (not shown) can be turned on by pressing the switch 66a once, and the hand illumination (not shown) can be turned off by pressing the switch 66a again. The switch 67a can be a timer for managing the entire operation of the range hood 1. For example, it is possible to set a “cut-off time” before the cook leaves the range hood 1 and to turn off the power to the range hood 1 when that time comes. The time can be set such that a predetermined length of time is added each time the switch 67a is pressed, or the time can be set using a display device (not shown).

  FIG. 12B is a schematic diagram for explaining the changeover switch 63a. The changeover switch 63a is provided with a switch 68a for performing “strong, medium changeover and stop” of the air curtain in accordance with the direction of the surface on which the air curtain is formed. FIG. 12B shows a case where an air curtain can be formed on three surfaces, and the “formation direction switching” of the air curtain can be performed depending on which surface switch 68a is selected. The panel 69 shows the arrangement of the stove provided in the heating cooker IH, and is intended to facilitate selection of the switch 68a corresponding to the air curtain to be formed or adjusted. Therefore, the panel 69 is not necessarily required.

  As shown in the figure, the switch 68a switches between two stages of “strong, medium, off” and stops. By pressing one of the “strong, medium, off” of the switch 68a, the air curtain The intensity (wind speed or air volume) can be switched and stopped. Note that the setting value of the wind speed or air volume in “strong, medium” is a predetermined value obtained in advance through experiments or the like in consideration of the influence of disturbance wind (cross wind) W or the like.

FIG. 13 is a schematic diagram for explaining the changeover switch 63b.
The changeover switch 63b is provided with a switch 68b for switching between “strong, medium, weak” and “stop” of the air curtain according to the direction of the surface on which the air curtain is formed. The case shown in FIG. 13 is a case where an air curtain can be formed on three surfaces. The air curtain can be “switched in the forming direction” depending on which surface switch 68b is selected. The panel 69 shows the arrangement of the stove provided in the cooking device IH, and is intended to facilitate selection of the switch 68b corresponding to the air curtain to be adjusted. Therefore, the panel 69 is not necessarily required.

  As shown in the figure, the switch 68b performs three-level switching of “strong, medium, weak”. By pressing one of the “strong, medium, weak” of the switch 68b, the strength of the air curtain (Wind speed or air volume) can be switched. Further, when the same portion of “strong, medium, weak” is pressed again, the discharge of air is stopped. For example, “strong” → “weak” switches from “strong” to “weak”, and “strong” → “strong” “stops”. Note that the setting value of the wind speed or the air volume in “strong, medium, weak” is a predetermined value obtained in advance through experiments or the like in consideration of the influence of disturbance wind (cross wind) W and the like.

FIG. 14 is a schematic diagram for explaining the changeover switch 70.
The changeover switch 70 is provided with a switch 68c for “switching strength” and “stop” of the air curtain in accordance with the direction of the surface on which the air curtain is formed. The case shown in FIG. 14 is a case where an air curtain can be formed on three surfaces. The air curtain can be “switched in the forming direction” depending on which surface switch 68c is selected.

  The switch 68c may be switched between “strong and stopped”, and the strength (wind speed or air volume) of the air curtain can be continuously changed according to the length of time the switch 68c is pressed. It may be such that it can be stopped by pressing it continuously. The set value of the wind speed or the air volume is a predetermined value obtained in advance through experiments or the like in consideration of the influence of disturbance wind (cross wind) W and the like.

FIG. 15 is a schematic diagram for explaining the changeover switch 71.
The changeover switch 71 is provided with a switch 68d for “switching and stopping (turning off)” the air curtain according to the direction of the surface on which the air curtain is formed. The case shown in FIG. 15 is a case where an air curtain can be formed on three surfaces. The air curtain can be “switched in the forming direction” depending on which surface switch 68d is selected.

  As shown in the figure, the switch 68d performs two-step switching and stop of “strong, medium, off”, and slides the knob of the switch 68d to any position of “strong, medium, off”. By adjusting to the above, it is possible to switch and stop the strength (wind speed or air volume) of the air curtain. Further, the air curtain strength (wind speed or air volume) may be continuously variable depending on the slide position of the knob of the switch 68d. The set value of the wind speed or the air volume is a predetermined value obtained in advance through experiments or the like in consideration of the influence of disturbance wind (cross wind) W and the like.

FIG. 16 is a schematic diagram for explaining the changeover switch 73.
The changeover switch 73 includes a panel 68 for facilitating selection of a switch 68b for switching between “strong, medium, weak” and “stop” of the air curtain, and a switch 68b corresponding to the air curtain to be adjusted. A switch 74 is provided for performing “up, middle, and lower switching” of the discharge angle. Since the switch 68b and the panel 69 are the same as those described with reference to FIG.

  As shown in the figure, the switch 74 switches the discharge angle in three stages of “up, middle, and lower”. By pressing one of the “up, middle, and lower” of the switch 74, the air flow is reduced. The air discharge angle of the curtain can be switched. For example, “down” may be a position vertically rotated, “middle” may be a position rotated 10 degrees upward from vertically below, and “up” may be a position rotated 20 degrees vertically below vertically. Note that the setting values of the discharge angle in “upper, middle, lower” are not limited to those described above, and are determined in advance by experiments or the like in consideration of the influence of disturbance wind (crosswind) W and the like. Can be used. Further, instead of the switch 74, a switch capable of continuously changing the discharge angle may be provided. For example, the discharge angle may be continuously changed only while the switch is pressed.

FIG. 17 is a schematic diagram for explaining a case where a changeover switch is built in the range hood.
For example, the changeover switch 70 or the changeover switch 71 is built in the range hood 1, and at the time of factory shipment or the installation work of the range hood 1, the manufacturing worker or the installation worker adjusts to the layout and installation environment of the system kitchen. It is also possible to initially set “switching the forming direction, switching the strength” of the air curtain. Depending on the installation environment, the direction and strength of the turbulent wind (cross wind) W may be stable, so setting errors as an initial setting value can prevent a setting error of the cook. Even in such a case, resetting by the built-in changeover switch is possible, so that it is possible to cope with environmental changes at a later date. In addition, the cooker demonstrated in FIG. 11 can also be used together with the changeover switch 63 for operation.

  Next, still another specific example of the range hood according to the present embodiment will be described.

  FIG. 18 is a schematic diagram for explaining a means for detecting a turbulent wind (cross wind) W provided in the range hood. The range hood 1 itself is the same as that described with reference to FIG.

  As shown in FIG. 18, a turbulent wind (cross wind) detecting means 72 is provided in the lower part 2a of the surface where the air curtain is formed. The turbulent wind (cross wind) detecting means 72 has a function of detecting the wind pressure, wind speed, etc. of the turbulent wind (cross wind) W. Detected values such as wind pressure and wind speed are converted into electrical signals and sent to a control device (not shown). The direction in which the air curtain is formed is determined based on this detected value, and the strength (wind speed or air volume) and discharge angle are adjusted. Is done. That is, an air curtain is formed only in a direction in which there is a disturbance wind (cross wind) W. The installation position of the turbulent wind (cross wind) detection means 72 is not limited to the illustrated position, and can be changed as appropriate. Moreover, it is not necessarily provided in the range hood 1 itself, and may be provided in the vicinity of the range hood 1.

Next, still another specific example of the range hood according to the present embodiment will be described.
When there is no turbulent wind (cross wind) W, it is more likely that the collection rate can be improved by equalizing the strength (wind speed or air volume) of the air curtain surrounding the range hood 1. However, even in that case, it may be necessary to adjust the strength (wind speed or volume) of the air curtain and the discharge angle in accordance with the installation environment.

FIG. 19 is a schematic diagram for explaining the changeover switch 75.
The changeover switch 75 includes a panel 68 for facilitating selection of a switch 68b for switching between “strong, medium, weak” and “stop” of the air curtain, and a switch 68b corresponding to the air curtain to be adjusted. In addition, a switch 76 is provided for switching according to “existence / absence” of disturbance wind (crosswind) W. Since the switch 68b and the panel 69 are the same as those described with reference to FIG.

  The switch 76 is for performing switching in accordance with “existence / non-existence” of the disturbance wind (cross wind) W. For example, by pressing the switch 76, a mode of “no disturbance wind (cross wind)” is entered, and again. By pressing the switch 76, a mode of “disturbance wind (side wind) exists” is entered. In the “no turbulent wind (cross wind)” mode, the strength (wind speed or air volume) of the air curtain on all surfaces is equal. In this case, the strength (wind speed or air volume) of the air curtains on all surfaces can be switched simultaneously by switching “strong, medium, weak” of any of the three switches 68b.

  On the other hand, in the “disturbance wind (crosswind) mode” mode, the same function as that of the changeover switch 63b described in FIG. For convenience of explanation, the description has been made based on the changeover switch 63b shown in FIG. 13, but the present invention can be applied to the other changeover switches 63, 63a, 70, 71, 73 described above.

  Further, as shown in FIG. 18, the presence / absence of the disturbance wind (crosswind) W is detected by the disturbance wind (crosswind) detection means 72, and the mode of “no disturbance wind (crosswind)” is automatically set. It is also possible to switch to the “disturbance wind (crosswind)” mode. At this time, in the “disturbance wind (crosswind)” mode, the air curtain 52 is formed on the side where the disturbance wind (crosswind) W is present.

The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples.
Regarding the above-described specific examples, those appropriately modified by those skilled in the art are also included in the scope of the present invention as long as they have the characteristics of the present invention.

  For example, the range hood 1, the heating cooker IH, the hood body 2, the lower part 2a, the intermediate part 2b, the upper part 2c, the internal space 2d, the suction fan 4, the lower surface member 6, the central hole 6a, the lower surface 6b, the current plate 8 and the suction port 10, discharge ports 14b, 14c, 14d, air passage 32, auxiliary fan 34, rectifier 36, operation switch 62, operation switch 62a, changeover switch 63, changeover switch 63a, changeover switch 63b, switch 64a, switch 65a, switch 66a, Switch 67a, switch 68a, switch 68b, switch 68c, switch 68d, panel 69, changeover switch 70, changeover switch 71, disturbance wind (crosswind) detection means 72, changeover switch 73, switch 74, changeover switch 75, switch 76, etc. The shape, dimensions, arrangement, number, etc. are limited to those described as specific examples. Not.

  Moreover, although the cross flow fan was illustrated as the auxiliary fan 34, it is not limited to this, It is possible to select suitably from what has ventilation functions, such as a sirocco fan and an axial flow fan.

Further, for convenience of explanation, disturbance wind (cross wind) is assumed to be blown from a substantially horizontal direction, but the present invention is not limited to this, and the present invention is blown from a direction inclined with respect to the horizontal. It is possible to cope with this.
Further, for the convenience of explanation, the disturbance wind (cross wind) is blown toward the range hood 1, but the same applies to the case of moving away from the range hood 1 (when the air curtain is sucked).

It is a schematic diagram for demonstrating the range hood which concerns on 1st embodiment of this invention. It is an AA arrow schematic diagram in FIG. It is a schematic diagram for demonstrating the formation condition of an air curtain conceptually. It is a graph for demonstrating the relationship between the formation surface number of an air curtain, and a collection rate. It is a graph for demonstrating the relationship between the wind speed (intensity) of an air curtain, and a collection rate. A measuring device for CO ₂ capture rate is a schematic diagram for explaining. It is an AA arrow schematic diagram in FIG. 1 which concerns on other embodiment. It is an AA arrow schematic diagram in FIG. 1 which concerns on other embodiment. It is an AA arrow schematic diagram in FIG. 1 which concerns on other embodiment. It is an AA arrow schematic diagram in FIG. 1 which concerns on other embodiment. It is a perspective view for demonstrating the external appearance of a range hood. It is a schematic diagram for demonstrating an operation switch and a changeover switch. It is a schematic diagram for demonstrating a changeover switch. It is a schematic diagram for demonstrating the changeover switch which concerns on other embodiment. It is a schematic diagram for demonstrating the changeover switch which concerns on other embodiment. It is a schematic diagram for demonstrating the changeover switch which concerns on other embodiment. It is a schematic diagram for demonstrating the case where the changeover switch is incorporated in the range hood. It is a schematic diagram for demonstrating the detection means of the disturbance wind (cross wind) W provided in the range hood. It is a schematic diagram for demonstrating the changeover switch which concerns on other embodiment.

Explanation of symbols

1 range hood, 2 hood body, 4 suction fan, 14b discharge port, 14c discharge port, 14d discharge port, 34 auxiliary fan, 52 air curtain, 53 air curtain, 56 air curtain, 57 discharge port, 58a discharge port, 58b discharge Outlet, 59a discharge port, 59b discharge port, 60 wide area, 61a discharge port, 61b discharge port, 61c discharge port, 62 operation switch, 62a operation switch, 63 changeover switch, 63a changeover switch, 63b changeover switch, 64a switch, 65a Switch, 66a switch, 67a switch, 68a switch, 68b switch, 68c switch, 68d switch, 70 changeover switch, 71 changeover switch, 72 disturbance wind (crosswind) detection means, 73 changeover switch, 74 switch, 75 changeover switch , 76 Switch, θ Discharge angle, W Disturbance wind (crosswind)

Claims (7)

A range hood installed above the heating cooker,
A suction port that faces the heating cooker and sucks air;
A discharge port that is provided outside the suction port and forms an air curtain at least in two directions when viewed from the suction port by discharging air downward;
Forming means for selectively forming only the air curtain on the side close to the disturbance wind among the air curtains in the two directions;
A range hood characterized by comprising   The range hood according to claim 1, further comprising a disturbance wind detecting means for detecting the disturbance wind.   The range hood according to claim 1, further comprising an angle adjusting unit that adjusts a discharge angle of air forming the air curtain.   The discharge port has a wide area extending in a circumferential direction around the suction port and having a wide width in a direction substantially perpendicular to the circumferential direction. Range hood described in 1.   The range hood according to any one of claims 1 to 4, further comprising a changeover switch for switching selection of the air curtain.   The range hood according to claim 5, wherein the changeover switch is built in the range hood. A suction port that faces the heating cooker and sucks air and is provided outside the suction port, and discharges air downward to form an air curtain at least in two directions as viewed from the suction port. A method for adjusting the range hood, which has a discharge port and is installed above the heating cooker,
A method for adjusting a range hood, wherein only the air curtain closer to the turbulent wind among the air curtains in the two directions is selectively formed.

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