JPH1118957A - Hot plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a domestic hot plate capable of preventing smoke from being diffused within a room by highly efficient smoke collection. SOLUTION: This hot plate comprises a heating means 5 arranged under a dish-like plate 4, a suction port 6 partially opened to the plate surface, a plate circumferential wall 7 having an inclination of obtuse angle with the plate surface, a blowing port 8 arranged in the upper part of the plate circumferential wall 7, an air passage 14 for connecting the suction port 6 to the blowing port 8, and a blowing means 9 and a smoke removing means 12 which are arranged within the air passage 14. Since air is discharged from the blowing port 8 to the suction port 6 provided in the center of the plate, the discharged air generates a negative pressure part in the inside space of the plate circumferential wall 7, which causes a Coanda effect of pulling the discharged air downward, so that an air flow is formed near the plate surface. The smoke can be thus pushed away toward the suction port 6 in the center of the plate without being shifted upward against the ascending current on the plate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot plate used for cooking grilled meat and the like for general household use, and more particularly to a hot plate for reducing diffusion of oil smoke generated during cooking.

[0002]

2. Description of the Related Art A conventional technique will be described below with reference to FIG. 1 is a plate, 2 is a heating means for heating the plate 1, and 3 is an exterior cover.

[0003] With the above arrangement, the plate 1 is heated by the heating means 2 and ingredients such as meat and vegetables are placed on the plate 1 and baked. At this time, oil from the meat or oil applied to the plate surface before cooking burns on the plate, generating a large amount of oil smoke,
It scattered and diffused into the room with the ascending air currents, polluting the ceiling, walls and floor. As a means to reduce the oil smoke itself generated in order to prevent this, there are many methods that set the plate temperature lower than usual during grilling, or a hot plate that has many holes in the plate and drops the oil at the bottom of the plate. Can be In addition, as means for removing generated oily smoke, at home, exhaust is generally discharged outdoors using a ventilation fan.

[0004] As a technique for business use, there is a technique in which a dining table and a heating cooker are integrated, and oil smoke is forcibly sucked from around or below a plate and discharged outside through a duct.

[0005] In addition, there is no need to discharge the oil to the outdoors, as described in "Method and Apparatus for Smoke Removal in Roaster" described in JP-A-62-101218. A "smokeless roaster" described in JP-A-7-3534 and a "cooking hot plate" described in JP-A-7-51168 have been proposed.

[0006]

However, in the hot plate having the above-mentioned structure, the amount of generated smoke is still large although the amount of oil smoke is reduced to some extent, and it is not enough to prevent oil smoke from diffusing into the room. . In addition, even if a ventilation fan is used, it is easy to be restricted in the place where it is used due to problems such as the distance relationship between the ventilation fan and the hot plate and the capacity of the ventilation fan. It was very difficult by nature to prevent oil fumes from spreading.

[0007] On the other hand, the technology for business use is large as an apparatus, and it requires duct work and is expensive.
It was difficult to use in general households.

[0008] In addition, most of the proposals in the patent gazette focus on only circulating oil smoke, and concretely propose a flow of air on a plate for realizing it. There was nothing.

The present invention is intended to solve the problems of the conventional configuration, and not only greatly reduces the diffusion of oil smoke into a room, but also requires no construction, is inexpensive, Moreover, it is an object of the present invention to provide a home-use hot plate that is compact in size, easy to use, and is not restricted by the place where it is used.

[0010]

Means for Solving the Problems In order to solve the above-mentioned problems, one means of the present invention is to provide a plate-like plate, a heating means arranged below the plate, and an opening in a part of the plate surface. An intake port, a plate peripheral wall having an inclination at which an angle between the plate surface and the plate surface is obtuse, an outlet disposed at an upper portion of the plate peripheral wall, and an air flow path connecting the intake port and the outlet under the heating means. A hot air which is formed by a blowing means and an oil / smoke removing means arranged in an air flow path, and which forms air flow near the plate surface by discharging air from the outlet to the air inlet provided at the center of the plate. Since the plate is used, the flow is hardly affected by the rising air current due to the heat of the plate, and the flow easily reaches the central intake port, so that the oil smoke can be easily sucked.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a plate according to a first embodiment of the present invention;
An intake port opened to a part of the plate surface, a plate peripheral wall having an obtuse angle formed by the plate surface, an outlet disposed above the plate peripheral wall, an intake port and an outlet below the heating means. And an air flow path connecting the air flow path and an air blowing means and an oil / smoke removing means arranged in the air flow path, and near the plate surface by discharging air from the outlet to the air inlet provided at the center of the plate. Since the hot plate is formed so as to form a flow of air, the flow of air coming out of the outlet is hardly affected by the rising airflow due to the heat of the plate, and can easily reach the central air inlet, so that the oil smoke can be easily sucked. Therefore, since a large amount of oil smoke is sucked from the air inlet and the oil smoke is removed by the oil smoke removing means in the main body, the diffusion of the oil smoke into the room can be greatly reduced.

According to the second aspect of the present invention, the air flowing from the outlet to the air inlet is a hot plate which forms a spiral air flow on the plate plane, so that the air flow near the air inlet is swirled. Since it is rectified and sucked in a form close to a natural phenomenon, oil smoke can be efficiently sucked.

According to the third aspect of the present invention, since the intake flow rate is larger than the blowout flow rate, the oil smoke can be reliably sucked together with the air flowing out of the blowout port and the air above the plate.

According to the fourth aspect of the present invention, since the flow rate of the air near the air inlet is larger than the flow velocity of the air near the air outlet, the smoke can be sucked from the air inlet without diffusing.

According to the fifth aspect of the present invention, since the opening area of the inlet is smaller than the opening area of the outlet, the flow rate of the air near the inlet is larger than the flow rate of the air near the outlet with a simple configuration. It can be sucked from the intake port without diffusing oily smoke.

According to the sixth aspect of the present invention, since an inclined surface which is inclined downward as approaching the intake port side is provided on the inner wall of the outlet port, the flow of the air emitted from the outlet port is caused by the heat of the plate. It is less susceptible to updrafts, can easily reach the central air intake, and can be easily suctioned without diffusing oil smoke.

According to the seventh aspect of the present invention, since the outlet is disposed above the lower end of the opening of the intake port, the air flow formed near the plate surface does not escape above the plate near the intake port. It can be sucked through the mouth.

According to the present invention, since the intake opening has an inclined surface having a wide opening at the bottom side, the flow of air flowing upward from the outlet through the outlet is corrected downward, Can be sucked through the inlet.

According to a ninth aspect of the present invention, the air flow path in the main body is provided below the heating means, and is formed by a heat shield plate having a substantially similar shape to the plate and an exterior cover disposed outside the heat shield plate. The heat shield plate in the vicinity of the outlet is provided with a flange portion for shutting off the air flow path, and the flange portion is provided with a large number of air rectifying ventilation holes. Can be constant.

According to a tenth aspect of the present invention, the air flow path in the main body is provided below the heating means, and is formed by a heat shield plate substantially similar in shape to the plate and an exterior cover disposed outside the heat shield plate. In addition, since there is an air flow path in which the distance between the heat shield plate and the outer cover is shortest in the vicinity of the air outlet, not only can the air volume and the air direction coming out of the air outlet be constant, but also the air flowing in the air flow path. Can flow along the exterior cover, and can easily direct the air coming out of the outlet downward from the horizontal.

According to the eleventh aspect of the present invention, since the seal portion for preventing air from flowing from the vicinity of the outlet to the back surface of the plate is provided near the outer periphery of the plate, the air guided to the outlet enters the back surface of the plate. Without cooling, it is possible to prevent cooling of the back surface of the plate and the heater. In addition, a predetermined flow rate can be secured without reducing the flow rate of air flowing on the plate surface, and oil smoke can be effectively guided to the intake port.

According to a twelfth aspect of the present invention, the gap formed between the outer peripheral wall of the plate and the inner peripheral wall of the heat shield plate is made smaller than the gap formed between the lower surface of the plate bottom and the upper surface of the heat shield plate.
Since the gap is 7 mm or less, a non-contact seal portion for preventing air from flowing to the back surface of the plate can be formed with a simple configuration, so that efficient suction of oil smoke and cooling of the back surface of the plate and the heater can be prevented.

According to the thirteenth aspect of the present invention, since the grooves or ribs extending radially from the center are provided on the plate surface, the air that has flowed out of the outlet is rectified on the plate surface, and the air near the plate surface toward the intake port is provided. The flow of air is easily formed, and efficient suction of oil smoke can be performed.

According to the fourteenth aspect of the present invention, since the lower end of the opening of the intake port is provided above the plate surface, the cooling of the plate surface due to the flow of intake air can be reduced. In addition, it is possible to prevent the cooking material or oil or moisture from the cooking material from entering the intake port.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0026]

【Example】

(Embodiment 1) FIGS. 1 to 3 show an embodiment according to the present invention. FIG. 1 is an overall configuration diagram, FIG. 2 is a partial detailed view of FIG.
Is a perspective view of the main body, showing the flow of air on the plate.

In the figure, reference numeral 4 denotes a plate, and 5 denotes a heating means for heating the plate 4 and comprises a sheathed heater.
Reference numeral 6 denotes an intake port provided substantially at the center of the plate 4, and reference numeral 7 denotes a plate peripheral wall which is inclined so that the inside of the plate becomes obtuse, and on which an outlet 8 is provided. Reference numeral 9 denotes a blower for flowing air from the outlet 8 toward the inlet 6, which comprises a radial or swept-back centrifugal fan and is driven by a motor 11 via a belt 10. Numeral 12 denotes an oil smoke removing means which is disposed on the intake side of the blowing means 9 and removes sucked oil smoke. Reference numeral 13 denotes a filter cover provided below the intake port of the plate to fix the filter and constitute an oil smoke intake path. Reference numeral 14 denotes an air flow path for guiding the wind generated by the air blowing means 9 to the outlet 8, which is formed by the heat shield plate 15 and the outer cover 16. Numeral 17 denotes ribs which are radially provided by rectifying means to prevent wind from flowing out from the outlet 8 in the circumferential direction of the plate, and to allow the swirling wind generated by the blower 9 to flow from the outlet 8 to the inlet 6. To a straight stream of air 18 directed to

Hereinafter, the operation and operation of this embodiment will be described mainly with reference to FIG. When the heating means 5 is energized, the plate 4 is heated. Thereby, the plate 4
The oil coming out of the food placed on top or the oil applied to the plate 4 before cooking is heated, and oil fumes 19 are generated. The oil smoke tends to diffuse while being caught in the upward airflow generated by the plate heating.

On the other hand, when the motor 11 is energized, wind is generated from the blowing means 9 by belt driving. Since the blowing means 9 is composed of a centrifugal fan, the generated wind turns in the circumferential direction of the centrifugal fan.
From the air, air is blown straight toward the air inlet 6 located substantially at the center of the plate. The blown air 20 generates a negative pressure portion 21 in the space inside the plate peripheral wall 7, and the blown air for this negative pressure portion is pulled downward like 22.

This is the Coanda effect, and a flow 23 is generated along the surface of the object (plate 4) under the influence of a negative pressure portion created by the fluid itself. This flow swirls the oil smoke generated on the plate toward the center of the plate, and is sucked together with the oil smoke from the intake port 6. The sucked oil smoke is removed by the oil smoke removing means 12. Therefore, the diffusion of the oil smoke into the room is greatly reduced.

When the air is simply blown from the outer periphery of the plate toward the center without forming the air flow 23 along the plate surface, an ascending air flow is generated on the plate.
The blown air is caught in the rising airflow and deflects upward, so that it cannot be sucked at the central intake port.
Therefore, in this case, the oil smoke cannot be removed by the oil smoke removing means, and the diffusion of the oil smoke into the room cannot be reduced. However, if the force against the rising airflow is given to the flow of the air blown out by the Coanda effect,
The air containing oily smoke can be sucked from the intake port without deviating upward.

As shown in FIG. 4, the Coanda effect occurs even when the plate peripheral wall 7 is vertical without being inclined, but in this case, since the space volume inside the plate peripheral wall increases, the degree of negative pressure decreases, and the Coanda effect itself also decreases. Become smaller. That is, since the force against the upward airflow is reduced, the blown-out air is easily deflected upward as indicated by 24, and is hardly sucked. On the other hand, in this case, a vertical vortex 25 is generated in the space inside the plate peripheral wall, and the oil smoke generated in the vicinity does not reach the intake port, starts convection in this space, and eventually diffuses upward. However, if the plate peripheral wall is inclined, the space inside the plate peripheral wall becomes smaller, so that the vortex 2
5 is unlikely to occur. Further, as shown in FIG. 2, when the corners between the plate peripheral wall and the plate are connected by an arc 26, the space becomes smaller and the effect is further enhanced.

Instead of inclining the plate peripheral wall, the entire plate peripheral wall is formed by an arc 27 as shown in FIG. 5A, or a step 2 is formed on the plate peripheral wall as shown in FIG.
Even if 8 is provided, the same effect can be obtained.

As described above, according to the present invention, the air blown from the outer periphery of the plate pushes the oil smoke toward the center, and the oil smoke can be sucked from the intake port without deviating upward from the plate. The oily smoke is removed by the oily smoke removing means, and the diffusion of the oily smoke into the room is greatly reduced. In addition, since the hot plate itself is provided with a means for reducing the diffusion of soot and smoke, no work is required and there are no restrictions on where to use the hot plate. Moreover, since it has a simple configuration, it is possible to realize an inexpensive, compact, and easy-to-use home hot plate.

(Embodiment 2) The description of the basic configuration is the same as that of Embodiment 1, and therefore will be omitted, and the flow of air and its operation will be described.

As shown in FIG. 6, the air discharged from the outlet is slightly swirled 29 on the plate plane toward the inlet. Although the direction is set by the rectifying means in FIG. 1, the position of the rectifying means is not limited thereto, and may be provided on a plate, for example. The direction of this vortex is counterclockwise when viewed from the top of the plate, and is the same as the direction of the fluid vortex phenomenon in the northern hemisphere of the Earth due to Coriolis force. Therefore, the suction at the intake port can be performed without difficulty against Coriolis force and without difficulty.

Further, since the streamline of the air flow on the plate becomes longer due to the vortex shape, the velocity gradient along the streamline of the air flow from the outlet to the inlet becomes gentle. Therefore, the acceleration component applied to the oily smoke can be reduced, so that an excessively large force is not applied to the oily smoke, and the leakage of the suction at the intake port due to the inertial force can be reduced.

As described above, according to the present invention, the air that has flowed out from the outlet on the outer periphery of the plate is efficiently sucked into the inlet provided at the center of the plate.

(Embodiment 3) Since the basic structure is the same as that of Embodiment 1, only different parts will be described, and the flow of air and its action will be described.

In FIG. 7, an exhaust port 30 is provided below the outer cover 16 for exhausting a part of the air blown from the blower means 9. Accordingly, the configuration is such that the flow rate of the air discharged from the outlet is smaller than the flow rate of the air suctioned at the air inlet. Of course, the position of the exhaust port does not need to be exactly as described above, and may be provided on the side surface or upper portion of the exterior cover, or an exhaust means may be provided instead.

The suction at the intake port is difficult to give directionality due to the characteristic of the air flow called suction.
As shown at 31, 31, the flow of the intake air is in various directions. Therefore, at the intake port, not only the air exiting from the outlet port but also the air originally above the plate is sucked together. Here, as shown in FIG. 7, the intake flow rate at the intake port is Q1, the blowout flow rate is Q2, and the flow rate of the blowout flow rate Q2, which is sucked at the intake port, is Q3. Assuming that the flow rate is Q4 and the flow rate of air that escapes above the plate without being sucked into the intake port among the blowout flow rates Q2 is Q5, the following relational expression is established.

Q1 = Q3 + Q4, Q2 = Q3 + Q5 Note that the oil smoke is included in Q2 on the plate, and therefore Q3,
Oil smoke will also be included in Q5.

Here, assuming that the intake flow rate and the blowout flow rate are the same and that all the oil smoke is sucked in through the intake port, that is, the following equation is obtained.

Since Q1 = Q2 and Q5 = 0, Q4 = 0, which means that there is no air which is originally above the plate and is sucked into the intake port. However, as described above, it is difficult to give a specific direction to the intake direction, and it is practically impossible to set Q4 = 0, and such a condition setting is inconsistent and hardly satisfied. I understand.

Considering the condition that the intake flow rate is set to be larger than the blowout flow rate and that all the oil smoke is sucked through the intake port, that is, the following equation is obtained.

Since Q1> Q2, Q5 = 0, Q4> 0, and it can be seen that such a condition setting can be satisfied without any contradiction. According to our experimental results, as a condition for satisfying this condition, a result that Q2 is about 60 to 80% of Q1 is appropriate.

As described above, according to the present invention, the air discharged from the outlet can be sucked from the inlet without escaping above the plate, so that the oil smoke generated during cooking can be greatly reduced.

(Embodiment 4) The description of the basic configuration is the same as that of Embodiment 1, and therefore will be omitted. The flow of air and its operation will be described.

In FIG. 2, the flow rate of the air sucked at the intake port is larger than the flow rate of the air discharged from the outlet. Therefore, the flow of air on the plate becomes faster from the outer periphery of the plate toward the center, and the energy of the fluid per unit space increases as it approaches the center of the plate.

Here, if the flow velocity on the outlet side is higher than the flow velocity on the intake side, the energy of the fluid per unit space on the outlet side is greater than the energy on the intake side. . This means that the force for blowing off the smoke is greater than the force for sucking the smoke, and as a result, the smoke cannot be sufficiently sucked and the smoke is diffused. However, as in the present invention, if the energy of the fluid per unit space on the intake side is larger than that on the blowout side, the force for sucking the oil smoke is larger than the force for blowing off,
Sufficient suction can be performed from the intake port without diffusing oil smoke.

As described above, according to the present invention, the oil smoke on the plate can be sucked from the intake port without being diffused by the blown air.

(Embodiment 5) The description of the basic configuration is the same as that of Embodiment 1, and therefore will be omitted. The flow of air and its operation will be described.

In FIG. 2, the opening area of the inlet is smaller than the opening area of the outlet. Here, assuming that the suction flow rate and the blowout flow rate are the same or the intake flow rate is larger than the blowout flow rate, the following equation of fluid continuity, flow rate = flow rate × passing area, indicates that the flow rate on the suction side is It will be larger than the flow velocity.

That is, as described in the fourth embodiment, it means that the energy of the fluid per unit space on the intake side is larger than that on the outlet side, and therefore, the force for sucking the oil smoke is greater than the force for blowing off. Is large, sufficient suction can be performed from the intake port without diffusing oil smoke.

As described above, according to the present invention, with a simple structure, the oil smoke on the plate can be sucked from the intake port without being diffused by the blown air.

(Sixth Embodiment) The description of the basic configuration is the same as that of the first embodiment, and will not be repeated.

Reference numeral 32 in FIG. 2 denotes an inclined surface provided on the upper wall of the inner surface of the outlet 8, which is inclined downward as approaching the inlet side, and serves to blow air downward from the outlet from below the horizontal. . As a result, the blown air is given a force against the upward airflow generated by the heat of the plate at an initial velocity. Therefore, the air containing the oily smoke is entrained in the upward airflow and is difficult to move upward, and is easily sucked from the intake port.

As described above, according to the present invention, with a simple structure, the air that has flowed out of the outlet does not deviate upward from the plate and pushes the oil smoke toward the center, so that the oil smoke can be efficiently sucked.

(Embodiment 7) The description of the basic configuration is the same as that of Embodiment 1, and therefore will be omitted. The flow of air and its operation will be described.

In FIG. 2, reference numeral 33 denotes a lower end of the opening of the intake port, which is provided below the outlet. Since the blown air obtains a force against the rising airflow generated by the heat of the plate by the Coanda effect or the like, it flows near the plate surface and flows at the same level as or below the outlet. Therefore, if the lower end of the opening of the air inlet is below the air outlet, the flow of the air flowing out of the air outlet is sucked into the air inlet without colliding with the lower part 34 of the air inlet.

Here, it is assumed that the lower end 33 of the inlet is located above the outlet 8 as shown in FIG. The air that has flowed out of the outlet flows near the surface of the plate, and a part of the flow collides with the lower portion 34 of the inlet. Thereafter, the colliding air loses its shelter and naturally goes upward, as shown by 35. on the other hand,
The flow of air at the intake port caused by the suction is as shown at 31, and the directions of the two flows do not match. In order to suck the air flow 35 at the intake port in such a situation, a suction force having energy enough to largely change the direction of the air flow 35 over a short distance is required. However, when realizing such a large suction force,
Technical problems such as an increase in noise due to an increase in air volume, a decrease in plate temperature, and an increase in the size of the blowing means, that is, an increase in the size of the main body of the apparatus are extremely large, and it is difficult to realize a home hot plate. Therefore, it is difficult to suck the upward air flow 35, and it is necessary not to generate the air flow itself as in the case of 35, and according to the present invention, this is possible.

As described above, according to the present invention, the outlet is arranged above the lower end of the opening of the intake port, so that the blown air can be sucked in the vicinity of the intake port without escaping above the plate.

(Eighth Embodiment) The description of the basic structure is the same as that of the first embodiment, and will not be repeated. The air flow and its operation will be described.

In FIG. 2, reference numeral 36 denotes an inclined surface of the intake opening having a wide bottom. Therefore, the inlet opening is in a state of facing obliquely upward. The air that has flowed out of the outlet flows near the plate surface, but due to the effects of food on the plate, the flow is not always near the plate surface to the end, and flows upward. There is also. For such upward flow of a plate, the upward velocity component of which is small and passes near the intake port can be corrected downward by diagonally upward the intake port opening and sucked. become able to.

As described above, according to the present invention, the upward flow of the plate can be corrected downward by the air discharged from the outlet, and the air can be sucked from the inlet.

(Embodiment 9) The description of the basic configuration is the same as that of Embodiment 1, and therefore will be omitted, and the flow of air and its operation will be described.

In FIG. 2, an air flow path 14 in the main body is provided below the heating means 5, and a heat shield plate 15 having a substantially similar shape to the plate 4 and an outer cover arranged outside the heat shield plate 15. 16. The heat shield plate is provided with a flange portion 37 for blocking the air flow path near the outlet 8, and the flange portion is provided with a large number of air rectification ventilation holes 38. The wind generated by the blowing means is
4 and passes through this flange near the outlet. At this time, since the flange portion has a large number of holes 38, it acts as a kind of airflow resistance, and the pressure on the lower or upper side of the flange portion is constant in the circumferential direction, while the lower side of the flange portion is on the upper side. The pressure is higher. Therefore, the wind has a velocity component flowing due to the pressure difference across the flange portion, but as described above, since this pressure difference is constant in the circumferential direction, the velocity component of the wind is constant, and thus the wind exits from the outlet. The flow and direction of the wind are constant in the circumferential direction. Since this can be uniquely determined by the shape and the number of the air rectifying ventilation holes 38, it is hardly affected by thermal deformation such as thermal deformation of the outer cover, and fluctuations in the air volume and direction due to heat can be reduced.

As another function, the food being cooked on the plate can be prevented from dropping from the outlet into the air flow path, so that it can be used safely from the viewpoint of hygiene and safety. .

As described above, according to the present invention, since the flange portion having the air rectifying ventilation hole has an air volume adjusting function and a rectifying function, the air volume and the air direction coming out of the outlet can be made constant. Further, it is possible to prevent the food from falling into the air flow path.

(Embodiment 10) The description of the basic configuration is the same as that of Embodiment 1, and therefore will be omitted, and the flow of air and its function will be described.

In FIG. 2, an air flow path 14 in the main body is provided below the heating means 5, and a heat shield plate 15 having a substantially similar shape to the plate 4 and an outer cover 16 disposed outside the heat shield plate. It is formed with. Reference numeral 39 denotes an air flow path in which the distance between the heat shield plate and the outer cover in the vicinity of the outlet 8 is shortest. When the wind passes through the air passage 39, the air passage 39
The pressure is higher on the lower side and lower on the upper side. Therefore, the wind has a velocity component flowing due to the pressure difference across the air flow path 39, but since this pressure difference is constant in the circumferential direction, the velocity component of the wind is constant in the circumferential direction, and therefore, from the outlet. The flow rate and direction of the outgoing wind are constant in the circumferential direction.

The air flowing in the air passage is covered by the outer cover 1.
Since the air flows along the inner wall of the air outlet 6, by providing an inclined surface or the like inside the air outlet as in the sixth embodiment, it is possible to easily direct the air flowing out of the air outlet downward from the horizontal.

As another function, it is possible to prevent the food being cooked on the plate from dropping from the outlet into the air flow path, so that the food can be used with safety and hygiene.

As described above, according to the present invention, not only can the amount and direction of air flowing out of the outlet be kept constant, but also the air flowing in the air flow path flows along the outer cover, and The outgoing air can be easily directed downward from the horizontal, and the food can be prevented from falling into the air flow path.

(Embodiment 11) Since the basic structure is the same as that of Embodiment 1, only the different parts will be described, and the flow of air and its operation will be described.

In FIG. 9, a seal portion 40 is provided between the heat shield plate 15 and the plate 4 on the outer peripheral portion thereof.
The seal portion 40 is made of a contact-type seal such that a part of the heat shield plate is brought into contact with the plate or an intermediate member is provided between the heat shield plate and the plate. This prevents the air guided to the outlet from entering the back side of the plate. Therefore, the plate can be maintained at a high temperature without the back surface of the plate or the heater being cooled by the wind. In addition, a predetermined flow rate can be secured without reducing the flow rate of air flowing on the plate surface, and oil smoke can be effectively guided to the intake port.

As described above, according to the present invention, the plate can be maintained at a high temperature, and the oil smoke can be effectively guided to the intake port to reduce the diffusion of the oil smoke.

(Embodiment 12) The description of the basic configuration is the same as that of Embodiment 1, and therefore will be omitted, and the flow of air and its function will be described.

In FIG. 2, reference numeral 41 denotes a gap formed between the outside of the plate peripheral wall 7 and the inside of the heat shield plate peripheral wall, and is smaller than a gap 42 formed between the lower surface of the plate bottom and the upper surface of the heat shield plate. 7 mm or less. This gap 4
1 prevents air from flowing to the back side of the plate and acts as a kind of non-contact type seal. The operation of this seal portion is the same as that described in the eleventh embodiment, but in addition to this, the present invention realizes this with a very simple configuration,
This has the effect of reducing the cost of parts and facilitating assembly.

In addition to the present embodiment described above, other non-contact seals such as a labyrinth seal may be used.

Thus, according to the present invention, in addition to the effect of the eleventh aspect, the seal portion can be realized with a very simple configuration.

(Embodiment 13) The basic configuration is the same as that of Embodiment 1, so that only the different parts will be described, and the flow of air and its operation will be described.

FIG. 10 is a plan view of the main body, and 43 is a groove provided on the plate surface and extending radially from the center. With this groove, the air that has flowed out of the outlet is rectified toward the central air inlet, so that the flow of air near the plate surface can be easily formed. Therefore, efficient suction of oil smoke can be performed. Further, the grooves accumulate oil and water emitted from the cooked food at the time of cooking, have a function of separating oil and water from the cooked food, and have an effect of improving the taste.

The same effect can be obtained even if the groove shape provided on the plate surface is not a linear shape as shown in the present embodiment, but a spiral type curve or the like. Although the grooves have been described here, the same rectifying effect can be obtained by providing radial ribs on the plate surface.

As described above, according to the present invention, since the air that has flowed out from the outlet is rectified on the plate surface, oil smoke can be efficiently sucked. Also, the taste is improved.

(Embodiment 14) The description of the basic configuration is the same as that of Embodiment 1, and therefore will be omitted. The flow of air and its function will be described.

In FIG. 2, the lower end 33 of the opening of the intake port is provided above the plate surface. Therefore, the flow of the air due to the intake air is easily formed above the plate surface, and the flow of the air in contact with the plate surface can be reduced. Therefore, the cooling of the plate surface due to the flow of air is reduced, and the plate can be maintained at a high temperature. In addition, providing the lower end of the opening above the plate surface may be achieved by forming an annular convex portion, ie, 3
4 is formed, and it is possible to prevent the food or oil or moisture from the food from entering the intake port.

As described above, according to the present invention, the plate can be maintained at a high temperature, and it is possible to prevent cooking or oil or moisture from the cooking from entering the intake port.

[0089]

According to the first aspect of the present invention,
A plate-shaped plate, a heating means arranged below the plate, an intake opening opened in a part of the plate surface, a plate peripheral wall having an obtuse angle with the plate surface, and an upper portion of the plate peripheral wall The air outlet that connects the air inlet and the air outlet below the heating means, and the blowing means and the oil and smoke removing means arranged in the air flow path, and the plate is provided from the air outlet. A hot plate that forms an air flow near the plate surface by discharging air to the intake port provided at the center of the plate, the blown air generates a negative pressure portion in the space inside the plate peripheral wall, The air blown out due to the negative pressure portion is pulled downward, so that a Coanda effect occurs, and an air flow near the plate surface is formed. This flow pushes the oil smoke toward the center of the plate without deviating upward against the upward airflow on the plate, sucks the oil smoke from the intake port, and removes the oil smoke by the oil smoke removing means.

Therefore, the diffusion of the oil smoke into the room with a simple configuration is greatly reduced. Also, the hot plate itself has a means to reduce the diffusion of oil smoke, so construction is unnecessary,
There are no restrictions on where you can use it. Moreover, since it has a simple configuration, it is possible to realize an inexpensive, compact, and easy-to-use home hot plate.

According to the second aspect of the present invention, the air flowing from the outlet to the air inlet forms a vortex air flow on the plate plane, so that the air is efficiently sucked without resisting the Coriolis force. be able to. In addition, the velocity gradient along the streamline of the air flow on the plate becomes gentle, and the inertial force of the oil smoke can be reduced, so that the suction leak at the intake port can be reduced.

According to the third aspect of the present invention, since the intake flow rate is larger than the blowout flow rate, the air flowing out of the blowout port can be sucked from the intake port without escaping above the plate, which is generated during cooking. Oil smoke can be significantly reduced.

According to the invention of claim 4 of the present invention, since the flow velocity by the intake air near the intake port is larger than the flow velocity by the blow air near the outlet, the force for sucking the oil smoke is larger than the force for blowing off. That is, sufficient suction can be performed from the intake port without diffusing oil smoke.

According to the fifth aspect of the present invention, since the opening area of the intake port is made smaller than the opening area of the outlet port, the flow rate of the intake air near the intake port can be reduced by the simple structure. Can be greater than the
It can be sucked through the intake port without diffusing oil smoke.

According to the invention described in claim 6 of the present invention, since the inclined surface which is inclined downward as it approaches the intake port side is provided on the inner wall of the outlet port, the flow of air flowing out of the exhaust port can be improved. Is hardly affected by the rising air current due to the heat of the plate, and the air blown out from the outer periphery of the plate pushes the oil smoke toward the center, so that the oil smoke can be sucked from the inlet without diffusing the oil smoke above the plate.

According to the seventh aspect of the present invention, since the outlet is disposed above the lower end of the opening of the intake port, the flow of air formed near the plate surface is increased above the plate near the intake port. It can be sucked from the intake port without escaping.

According to the invention described in claim 8 of the present invention, since the intake opening has an inclined surface whose bottom is wide, the air discharged from the outlet is placed on the plate. In the case of going upward of the plate under the influence of the above, the flow can be corrected downward and can be sucked from the intake port.

According to the ninth aspect of the present invention, the air flow path in the main body is provided below the heating means, and is disposed outside the heat shield plate and a heat shield plate substantially similar in shape to the plate. The heat shield plate near the outlet is provided with a flange portion for shutting off the air flow path, and the flange portion is provided with a number of air rectifying ventilation holes. It is possible to make the volume and direction of the air coming out of the container constant. Further, it is possible to prevent the food from falling into the air flow path.

According to the tenth aspect of the present invention,
The air flow path inside the main body is provided below the heating means, and is formed by a heat shield plate having a shape substantially similar to the plate and an outer cover arranged outside the heat shield plate. Because it has an air flow path that minimizes the distance to the cover, not only can the air volume and the air direction coming out of the outlet be constant, the air flowing in the air flow path will flow along the outer cover, It is possible to easily direct the air coming out of the outlet downward from the horizontal. Further, it is possible to prevent the food from falling into the air flow path.

According to the eleventh aspect of the present invention,
Since the seal portion for preventing air from flowing from the vicinity of the outlet to the back surface of the plate is provided near the outer periphery of the plate, the air guided to the outlet does not enter the back surface of the plate, and the plate can be maintained at a high temperature. A predetermined flow rate can be ensured without reducing the flow rate of the air flowing on the plate surface, and the oil smoke can be effectively guided to the intake port to reduce the diffusion of the oil smoke.

According to the twelfth aspect of the present invention,
The gap formed between the outer periphery of the plate and the inner periphery of the heat shield plate is made smaller than the gap formed between the lower surface of the plate bottom and the upper surface of the heat shield plate, and the gap is set to 7 mm or less. A very simple structure can be used to form a seal portion to prevent the oil from being absorbed, and efficient suction of oil smoke and cooling of the back surface of the plate and the heater can be prevented.

According to the thirteenth aspect of the present invention,
Since grooves or ribs extending radially from the center are provided on the plate surface, the air that has flowed out of the outlet is rectified on the plate surface, and the flow of air near the plate surface toward the intake port is more likely to be formed. Good oil smoke can be sucked. In addition, the taste and the like can be improved because oil and water from the food can be separated from the food.

According to the fourteenth aspect of the present invention,
Since the lower end of the opening of the intake port is provided above the plate surface, the flow of air in contact with the plate surface is reduced, so that the plate can be maintained at a high temperature. In addition, it is possible to prevent the cooking material or oil or moisture from the cooking material from entering the intake port.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a hot plate according to a first embodiment of the present invention.

FIG. 2 shows Examples 1, 4, 5, 6, 7, 8, 9,
Partial sectional view of the hot plate at 10, 12, and 14

FIG. 3 is an external perspective view of a hot plate according to the first embodiment of the present invention.

FIG. 4 is an explanatory view of the flow of air when the plate peripheral wall of the hot plate of the present invention is made vertical.

FIG. 5A is a partial cross-sectional view of another configuration of the hot plate according to the first embodiment of the present invention.

FIG. 6 is an external perspective view of a hot plate according to a second embodiment of the present invention.

FIG. 7 is a partial sectional view of a hot plate according to a third embodiment of the present invention.

FIG. 8 is an explanatory view of the flow of air when the lower end of the opening of the inlet of the hot plate of the present invention is above the outlet.

FIG. 9 is a partial sectional view of a hot plate according to an eleventh embodiment of the present invention.

FIG. 10 is a plan view of a hot plate according to a thirteenth embodiment of the present invention.

FIG. 11 is a cross-sectional view of a conventional hot plate.

[Explanation of symbols]

 1, 4 plate 2, 5 heating means 3, 16 exterior cover 6 intake port 7 plate peripheral wall 8 outlet 9 blowing means 12 oil and smoke removing means 14 air flow path 15 heat shield plate 17 rectifying means 21 negative pressure part 23 near plate surface Air flow 32 Inclined surface 33 Lower end of opening of intake port 36 Inclined surface of inlet opening 37 Flange part 30 Exhaust port 38 Ventilation hole for air rectification 40 Seal part 43 Groove

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Takahiro Oshita 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Koichi Nakano 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. Matsushita Electric Industrial Co., Ltd.

Claims (14)

[Claims] 1. A plate-shaped plate, a heating means disposed below the plate, an intake port opened to a part of the plate surface, and a plate peripheral wall having an obtuse angle between the plate surface and the plate surface. And, an outlet arranged at the upper part of the plate peripheral wall, an air flow path connecting the air inlet and the outlet under the heating means, and a blowing means and an oil smoke removing means arranged in the air flow path, A hot plate which forms a flow of air near the plate surface by discharging air from an outlet to the inlet provided at the center of the plate. 2. The hot plate according to claim 1, wherein the air flowing from the outlet to the air inlet forms a vortex air flow on the plate plane. 3. The hot plate according to claim 1, wherein the intake flow rate is larger than the blowout flow rate. 4. The hot plate according to claim 1, wherein a flow velocity of the air near the air inlet is larger than a flow velocity of the air near the air outlet. 5. The hot plate according to claim 1, wherein the opening area of the inlet is smaller than the opening area of the outlet. 6. The hot plate according to claim 1, wherein the upper surface of the inner surface of the outlet is provided with an inclined surface which is inclined downward as approaching the inlet side. 7. The hot plate according to claim 1, wherein the outlet is disposed above the lower end of the opening of the inlet. 8. The hot plate according to claim 1, wherein the inlet opening has a slope having a wide opening on the bottom side. 9. An air flow path in the main body is provided below the heating means, and is formed by a heat shield plate having a substantially similar shape to the plate and an outer cover disposed outside the heat shield plate. 3. The hot plate according to claim 1, wherein the heat shield plate is provided with a flange portion for blocking an air flow path, and the flange portion is provided with a plurality of air rectification ventilation holes. 10. An air flow path in the main body is provided below the heating means, and is formed by a heat shield plate having a substantially similar shape to the plate and an outer cover disposed outside the heat shield plate. 3. The hot plate according to claim 1, wherein the hot plate has an air flow path that minimizes the distance between the heat shield plate and the exterior cover. 11. The hot plate according to claim 1, wherein a seal portion for preventing air from flowing from the vicinity of the outlet to the back surface of the plate is provided near the outer periphery of the plate. 12. A structure in which a gap formed between the outer peripheral wall of the plate and the inner wall of the heat shield plate is smaller than a gap formed between the lower surface of the plate bottom and the upper surface of the heat shield plate, and the gap is 7 mm or less. Item 3. The hot plate according to item 1 or 2. 13. The hot plate according to claim 1, wherein a groove or a rib extending radially from the center is provided on the plate surface. 14. The hot plate according to claim 1, wherein the lower end of the opening of the intake port is provided above the plate surface.