JP2005098618A - Range hood for ih cooking heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suck and exhaust the contaminated air generated in cooking by an IH cooking heater without leaking the contaminated air to the external, while keeping its slim appearance. <P>SOLUTION: In this range hood for the IH cooking heater wherein a recessed part 21 is formed on a lower face of a thin hood body 1 as a capture space S for capturing the contaminated air B, a suction port 211 is formed on a top face part of the recessed part 21, and an exhausting means 2 is mounted on a top plate part of the hood body 1 in a state communicating with the suction port 211, a chamber 15 is formed between the back of the recessed part 21 and a front part of the food body 1, a cross-flow fan 5 is accommodated in the chamber 15, a suction hole 151 is formed on an outer face part of the hood body 1 faced to the chamber 15, a straightening vane 4 is mounted to cover the suction port 211 from its lower part while securing a suction clearance 15 between an opening edge of the recessed part 21 and the straightening vane, and the guided current C is blown out from a guided current blowout port 152 at a lower side of a front part of the hood body 1 along a surface of the straightening vane 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a range hood for an IH cooking heater that sucks and exhausts contaminated air from an IH cooking heater that does not generate combustion gas.

  Conventionally, in this range hood for this type of IH cooking heater, a convection air flow is blown upward from the lower position of the hood body with the lower surface as the suction side, and the contaminated air generated by cooking with the IH cooking heater in the motive flow There is known a device that attracts the hood to the hood (for example, Patent Document 1).

  In this prior art, an induced flow that blows upward from the lower side of the hood body before the contaminated air from the IH cooking heater spreads as it rises is guided to the hood body.

By the way, in recent years, various kitchen layouts that incorporate Western styles have been proposed, and many system kitchens that emphasize designers in harmony with them have appeared. The range hood incorporated in these system kitchens is also expected to have a design that matches these, and recently the hood body part that has the greatest influence on the capture of contaminated air generated by cooking is made very thin. Slim type range hoods tend to increase.
In recent years, IH cooking heaters have begun to attract attention as a clean and safe cooker that can be cooked without generating combustion gas at the same time, and many households adopt these electric kitchen equipment.
Range hoods that require a deep capture space and range hoods that have exhaust devices installed in the hood cause a problem that they cannot implement a novel design as a hood body as a result of increasing design constraints.
In that respect, a thin (slim) range hood with a shallow capture space and an external exhaust means offers greater design freedom and allows customers the flexibility to meet their needs. Become.
Japanese Patent Laid-Open No. 2002-168896

  However, if the thin-type range hood for the IH cooking heater is provided with the urging flow blowing means from below focusing on the prior art, the slimness of the thin-type range hood is impaired and the commercial value is lowered.

  The present invention has been made in view of the above-mentioned conventional circumstances, and the problem is a thin range hood for an IH cooking heater, which leaks contaminated air generated by cooking with the IH cooking heater to the outside without impairing the slimness. Intake without exhausting and exhaust.

  The technical means taken to solve the above problems is to provide a capture space for capturing contaminated air by providing a concave portion on the lower surface of the thin hood body, and providing a suction port on the top surface portion of the concave portion, A range hood for an IH cooking heater in which exhaust means is provided in communication with the suction port on the top plate portion of the hood body, the cross flow fan between the back of the recessed portion and the front side portion of the hood body A chamber is formed, a cross flow fan is accommodated in the chamber, a suction hole is formed in the outer surface of the hood body facing the chamber, and the air sucked by the operation of the cross flow fan is recessed. A range hood for an IH cooking heater, characterized in that a convection flow outlet that blows out from the lower part of the front portion of the hood body is provided as an urging flow to the hood body (Claim 1).

  Further, a current plate is provided to cover the suction port from below by securing a suction gap with the open edge of the concave portion, and the induced flow is blown from the induced flow outlet along the surface of the current plate. Even if it is put out, it is desirable (claim 2).

  A rectifying plate is provided to cover the suction port from below by securing a suction gap with the open edge of the recess, and the convection flow is blown into the communication space with the front suction gap in the recess. It is also desirable to accelerate the contaminated air sucked up at a higher flow velocity from the front suction gap.

  It is also desirable that a guide portion for guiding the induced flow flowing along the current plate surface to the rear suction gap is formed on the rear portion of the hood body.

  The chamber is formed to communicate between both side portions of the hood body and the back of the recessed portion, and the convection outlet is provided from the front portion of the hood body to both side portions of the hood body. It is desirable that the convection flow is blown out from the convection flow outlet (claim 5).

  The chamber is formed to communicate between both side portions of the hood body and the back of the recessed portion, and the induction flow outlet is provided from the front portion of the hood body to both side portions of the hood body. It is also desirable to blow out the dynamic flow from the induced flow outlet along the surface of the rectifying plate (claim 6).

  Further, the chamber is formed to communicate between both side portions of the hood body and the back of the recessed portion, and the convection outlet is provided from the front portion of the hood body to both side portions of the hood body. The contaminated air that is blown into the communication space with the front suction gap in the recessed portion and the communication space with the side suction gap and sucked at a higher flow rate from the front suction gap and the side suction gap. It is also desirable to accelerate the vehicle (claim 7).

  As described above, the present invention uses a cross-flow fan that is suitable for generating a turbulent flow with a uniform wind speed in the longitudinal direction and does not require a large casing, such as a centrifugal fan. From the lower side, a convection flow is blown out to the concave part with the lower surface open, and the contaminated air that has spread once in the middle of the rising process is guided to the concave part. The contaminated air can be captured and exhausted without leaking to the outside without being damaged.

  Further, a current plate is provided to cover the suction hole from below by securing a suction gap between the open edge of the concave portion, and the induced flow is blown out from the induced flow outlet along the surface of the current plate. In this case, the wake flow that flows along the surface of the rectifying plate generates a flow that generates a negative pressure action due to the Coanda effect, so an arc due to the entrainment effect is drawn from the front to the rear of the hood body. A large flow is generated, and the contaminated air that rises unstablely is drawn to this large flow and guided to the rear and side suction gaps, and the suction action by increasing the flow velocity in the suction gap is also synergistic. Thus, higher capture efficiency can be achieved (claim 2).

  In addition, a rectifying plate that covers the suction port from below by securing a suction gap with the open edge of the recess is provided, and the front side in the recess is provided from the induced flow outlet provided on the lower portion of the front portion of the hood body. When the air is blown into the communication space with the suction gap, the guide flow from the induced flow outlet accelerates the contaminated air that is sucked in from the front suction gap, and reaches the hood body. The polluted air spreading forward can be effectively sucked by the accelerated suction flow, and the polluted air can also be captured and exhausted without leaking outside (claim 3).

  Furthermore, when the guide part which guides the induced flow which flows along the baffle plate surface to the rear suction gap is formed in the rear part of the hood body, the induced flow blown from the lower part of the front part of the hood body Even if the wind speed is increased, the guide part reliably captures the air, so that the contaminated air can be effectively attracted and captured for high attraction by the strong flow blown along the current plate (claim 4).

  In addition, the induction outlet of the first, second, third, and fourth aspects is provided from the lower front part of the hood body to the lower side of both side parts of the hood body, and the convection flow is provided below the front part of the hood body. Since the air is blown out not only on the side but also on the lower side of both sides of the hood body, it is possible to improve the efficiency of capturing the contaminated air that spreads before reaching the hood body, and greatly reduce the leakage of the contaminated air (invoice) Item 5, 6, 7).

  Hereinafter, an embodiment of a range hood for an IH cooking heater according to the present invention will be described with reference to FIGS. 1 to 8. FIG. 1 shows the first embodiment, FIG. 2 shows the second embodiment, 3 shows the third embodiment, FIGS. 4 and 5 show the fourth embodiment, FIGS. 6 and 7 show the fifth embodiment, and FIG. 8 shows the sixth embodiment. Show.

If it demonstrates based on FIG. 1, the code | symbol A is the range hood.
This range hood A is provided with an exhaust means 2 above the top plate portion 11 of a flat and thin box-shaped hood body 1 whose lower surface is opened, and the exhaust means 2 is concealed by a curtain plate 3 erected from the front. A rectifying plate 4 is provided with a suction gap 14 between the lower open edge 4 and the air sucked by the operation of the cross flow fan 5 installed in the hood body 1 is blown out along the rectifying plate 4. It has become.

  The hood body 1 is provided with a recessed portion 21 on the lower surface, and the recessed portion 21 is used as a capture space S for contaminated air B generated by cooking, and a suction port 211 is formed in the top surface portion of the recessed portion 21. A grease filter 6 is detachably provided, and a chamber 15 for the cross flow fan 5 is defined between the front side portion and the back of the recessed portion 21.

  The rectifying plate 4 is a metal plate of an appropriate size that hides the grease filter 6 from below, as is well known in the art, and is detachably locked to the recessed portion 21.

  The cross flow fan 5 is a blowing means that blows out from the entire length in the longitudinal direction at a uniform wind speed, and is substantially a chamber 15 that is partitioned by effectively utilizing the space between the front portion of the hood body 1 and the back of the recessed portion 21. Invitation to open the air sucked from the suction hole 151 horizontally installed over the entire length and opened in the outer surface portion of the hood body 1 facing the chamber 15 over the entire length of the lower part of the front portion of the hood body 1 It blows out along the surface of the said rectifying plate 4 from the dynamic flow blower outlet 152. As shown in FIG.

In the range hood A for the IH cooking heater configured as described above, from the induced flow outlet 152 that is opened over substantially the entire length of the lower front portion of the hood body 1 by the operation of the cross flow fan 5 described above. The blown-out air becomes an induced flow C by the Coanda effect and flows along the surface of the rectifying plate 4.
Contaminated air B that is generated by heating cooking and spreads as it rises is attracted to this induced flow C, and is sucked at the suction gap 14 at a high flow rate. The sucked contaminated air B is exhausted to the outside through the exhaust means 2 and the exhaust duct 7 after the oil and fat content is removed by the grease filter 6.
The wind speed of the induced flow C blown out from the cross flow fan 5 is set to such a level that the midway part of the rectifying plate 4 stalls on the rear side.

  Next, a second embodiment shown in FIG. 2 will be described. In this embodiment, an induced flow C flowing along the surface of the rectifying plate 4 in the rear portion of the hood body 1 of the first embodiment. Is formed with a guide portion 8 for guiding the air to the rear suction gap 143.

  The guide portion 8 is an upward inclined surface formed on the rear constituent wall 212 of the recessed portion 21 where the induced flow C flowing by the Coanda effect along the surface of the rectifying plate 4 collides, and an upper end portion of the upward inclined surface Are connected to the concave surface 21 top surface portion with a curved surface.

  The range hood A for the IH cooking heater configured as described above forms the guide portion 8 that guides the induced flow C flowing along the surface of the rectifying plate 4 to the rear suction gap 143. The convection flow C is blown out from the convection flow outlet 152 at a strong wind speed rather than a wind speed that stalls in the middle of 4, and the large negative pressure action induces the polluted air B that spreads as it rises with a stronger force Then, it can be guided to the suction gap (especially the rear suction gap) 14.

Next, a third embodiment shown in FIG. 3 will be described. In this embodiment, in place of the first embodiment which blows out along the surface of the rectifying plate 4, it is provided in the recessed portion 21. The induced flow C is blown out from the induced flow outlet 152 into the communication space 141 a with the front suction gap 141.
In the drawing, the induced flow C is blown obliquely upward, but when the rectifying plate 4 is arranged slightly below the position shown in FIG. 3, the induced flow C is blown out in a horizontal direction or a substantially horizontal direction. Is also good.

  By comprising in this way, the suction flow velocity of the contaminated air B sucked from the front suction gap 141 by the induced flow C is further accelerated, and the trapping efficiency of the contaminated air B is improved.

  Further, the fourth embodiment shown in FIG. 4 and FIG. 5 will be described. In the fourth embodiment, the chamber 15 of the first embodiment is replaced with both side portions of the hood body 1 and the recessed portion 21. The convection flow outlet 152 is provided from the lower part of the front part of the hood body 1 to the lower part of both side parts of the hood body 1 so as to induce the convection flow C. It blows out along the surface of the baffle plate 4 from the dynamic flow blower outlet 152.

In this embodiment, the chamber 15 is formed not to be full length but halfway on both side portions of the hood body 1, and is opened to the lower side of both side portions of the hood body 1 at the motive flow outlet 152. In order to avoid direct interference with the induced flow C blown out from the front side induced flow outlet 152a from the side induced flow outlets 152b, 152b, the louver mechanism 9 provided in the chamber 15 is minimized. Then, the induced flow C is blown out obliquely toward the rear.
By doing so, the induced flow C is directed rearward from the three sides excluding the rear side along the surface of the current plate 4, that is, from the lower part of the front part of the hood body 1 and the lower part of both side parts of the hood body 1. Since it blows out, the leakage of the contaminated air B from the side of the hood body 1 is also prevented. Reference numeral 15 a denotes an end wall of the chamber 15.

Each of the fifth embodiments shown in FIGS. 6 and 7 will be described. In the fifth embodiment, the chamber 15 of the third embodiment is connected to both side portions of the hood body 1 and the back of the recessed portion 21. The convection flow outlet 152 is provided from the lower part of the front part of the hood body 1 to the lower part of the both side parts of the hood body 1, and the convection flow C is formed in the recessed portion. 21, the air is blown into the communication space 141a with the front suction gap 141 and the communication spaces 142a and 142a with the side suction gaps 142 and 142, respectively, and sucked at a higher flow rate from the front suction gap 141 and the side suction gaps 142 and 142. The contaminated air B is accelerated.
Also in this embodiment, the wake-up flow C is blown obliquely upward as shown in the figure, or blown out in a horizontal direction or a substantially horizontal direction to each of the communication spaces 141a, 142a, 142a behind the rectifying plate 4.
As shown in FIG. 7, as in the fourth embodiment, the side induced flow outlet 152b is directly connected to the induced flow C blown out from the front induced flow outlet 152a. In order to avoid interference as much as possible, the louver mechanism 9 provided in the chamber 15 is formed so that the convection flow C is blown out obliquely toward the rear so that the contaminated air B leaks from the side of the hood body 1. It comes to prevent.
Unlike the one shown in FIG. 7, the induced flow C is blown out in the direction orthogonal to the induced flow C from the front side induced flow outlet 152 a from the side induced flow outlets 152 b and 152 b. The chamber 15 is provided over substantially the entire length of both side portions of the hood body 1, and the side side induced flow outlets 152 b and 152 b are provided over the entire length of the extended chamber portion. In addition, it is free to blow out the induced flow C from the lower side of the hood body 1 at almost the entire lower side.

Further, a sixth embodiment shown in FIG. 8 will be described. This embodiment is a range hood for an IH cooking heater that does not use the current plate 4.
The configuration is the same as those of the first, second, and fourth embodiments described above except that the rectifying plate 4 is not used. However, the convection outlet 152 is provided on the bottom surface of the chamber 15 on the outer side. In addition, the induction operation by the induction flow C is made to work in a wide range so that the leakage of the contaminated air B can be greatly reduced.

Front sectional drawing of the range hood for IH cooking heaters of 1st Embodiment. Front sectional drawing of the range hood for IH cooking heaters of 2nd Embodiment. The front sectional view of the range hood for IH cooking heaters of a 3rd embodiment. Front sectional drawing of the range hood for IH cooking heaters of 4th Embodiment. The bottom view of FIG. Front sectional drawing of the range hood for IH cooking heaters of 5th Embodiment. The bottom view of FIG. Only the principal part is expanded and shown in front sectional drawing of the range hood for IH cooking heaters of 6th Embodiment.

Explanation of symbols

A: Range hood 1: Hood body 21: Recessed portion S: Capture space 11: Top plate portion (top plate portion of the hood body) 211: Suction port 2: Exhaust means 5: Cross flow fan 15: Chamber 151: Suction hole 152: Induction flow outlet 4: Current plate 14: Suction gap 141: Front suction gap 141a: Communication space (communication space with the front suction gap) B: Contaminated air C: Guide flow 143: Rear suction gap 8: Guide part 142: Side suction gap 142a: Communication space (communication space with side suction gap)

Claims (7)

  A recessed space is provided on the lower surface of the thin hood body to form a capture space for capturing contaminated air, and a suction port is provided on the top surface of the recessed surface, on the top plate portion of the hood body. A range hood for an IH cooking heater in which exhaust means is provided in communication, wherein a cross flow fan chamber is defined between the back of the recessed portion and the front portion of the hood body, and the cross flow fan is provided in the chamber. And a suction hole is formed in the outer surface of the hood body facing the chamber, and the air sucked by the operation of the cross flow fan is used as an urging flow to the concave portion, and the lower part of the front part of the hood body is almost full length. A cooker hood for an IH cooking heater, characterized in that it is provided with a convection outlet that blows out from the IH cooking heater.   A rectifying plate is provided that secures a suction gap between the open edge of the recessed portion and covers the suction port from below, and blows out the induced flow from the motive flow outlet along the surface of the rectifying plate. The range hood for an IH cooking heater according to claim 1.   A rectifying plate is provided that covers the suction port from below by securing a suction gap between the open edge of the recess and the front side by blowing the induced flow into a communication space with the front suction gap in the recess. The range hood for an IH cooking heater according to claim 1, wherein the contaminated air sucked in is accelerated by increasing the flow velocity from the suction gap.   3. A range hood for an IH cooking heater according to claim 2, wherein a guide portion for guiding an induced flow flowing along the surface of the current plate to the rear suction gap is formed in a rear portion of the hood body. .   The chamber is formed to communicate between both side portions of the hood body and the back of the recessed portion, and the convection outlet is provided from the lower front portion of the hood body to the lower side portions of the hood body. The range hood for an IH cooking heater according to claim 1, wherein the induction flow is blown out from the induction flow outlet.   The chamber is formed to communicate between both side portions of the hood body and the back of the recessed portion, and the convection outlet is provided from the lower front portion of the hood body to the lower side portions of the hood body. The range hood for an IH cooking heater according to claim 2 or 4, wherein the convection flow is blown out from the convection flow outlet along the surface of the current plate.   The chamber is formed to communicate between both side portions of the hood body and the back of the recessed portion, and the convection outlet is provided from the lower front portion of the hood body to the lower side portions of the hood body. And the suction flow is blown into the communication space with the front suction gap in the recessed portion and the communication space with the side suction gap, and is sucked in at a high flow rate from the front suction gap and the side suction gap. The range hood for an IH cooking heater according to claim 3, wherein air is accelerated.

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