JP2012004057A - Induction heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve both cooling capability and draining capability at the same time under restricted installation conditions by improving the cooling efficiency without impairing a function to prevent failures and tracking due to internal components that are exposed to water infiltrated into a main body.SOLUTION: A box-like water infiltration prevention wall 16 comprising a main wall 17, a front wall 18 and a rear wall 20 is arranged on a substrate cover 6 in lower front of an air outlet 9 provided on a top surface in rear of a main body 1. The box-like water infiltration prevention wall arranged on the substrate cover also comprises: a front opening 19, which is formed on the front wall 18, for guiding cooling air for a heating coil 4 to the air outlet 9; and a rear opening 21, which is formed on the rear wall 20, for exhausting the cooling air guided from the front opening 19 to the air outlet 9. Consequently, infiltration of water into the main body is avoided, thereby preventing failures, electric shock and tracking caused by wet internal components and a wet charging part, and also ensuring an exhaust guide path for cooling air.

Description

  The present invention relates to an induction heating cooker.

  FIG. 6 shows a perspective view of a conventional induction heating cooker. A conventional induction heating cooker includes a main body 1, a top plate 2 for placing a cooking utensil disposed on the top surface of the main body 1, a frame 3 for holding the top plate 2, and a top plate 2. Left and right heating coils 4b and 4a provided below, a control board 5 that controls heating, a board cover 6 that is installed above the control board 5 and holds the heating coil 4, and the front and right heating coils of the main body 1 4a, a heating fan 4 for cooling the control board 5 and a cooling fan 7, a suction port 8 provided in front of the main body 1 for supplying cooling air, and a top surface behind the main body 1. A standing wall 10 provided on the substrate cover 6 is provided with left and right exhaust ports 9b and 9a for exhausting cooling air from the heating coil 4 and the control substrate 5 and preventing water entering from the exhaust port 9 from flowing into the main body. Has been.

  However, in the above configuration, water intrusion into the main body 1 from the exhaust port 9 can be prevented, but efficient exhaust of the cooling air from the right heating coil 4a is hindered. As a result, the cooling air from the right heating coil 4a is prevented. Most of the air was exhausted to the exhaust port 9b disposed behind the left heating coil 4b, and there was a problem in cooling efficiency.

Patent Document 1 is an example in which both cooling efficiency and prevention of water intrusion from an exhaust port are achieved.
FIG. 7 shows a cross-sectional view of a main part of a conventional built-in induction heating cooker described in Patent Document 1. A conventional built-in induction heating cooker includes a main body 1, an exhaust port 9 disposed on the upper surface of the sink 11 disposed on the main body 1, and an upright wall 10 a perpendicular to the lower wall 1 a of the outer wall position facing the exhaust port 9. And a vertical wall 10b perpendicular to the top wall 1b provided at a position opposite to the lower wall 1a inside the main body is provided to constitute a box 12 having a constant volume.

  With the above configuration, even if the user spills the water that has entered the pan etc. in the direction of the back wall 11a of the sink 11, and the water is about to enter the exhaust port 9 by the splash, the standing wall 10a Even when a part of the flooding jumps over the upper end of the standing wall 10a, it is blocked by the standing wall 10b to prevent direct water impingement on the control board 5 provided in the main body, By preventing the water from adhering to the back surface of the control board 5 due to inflow by being stored in the box portion 12, if a large amount of water overflows into the main body, before the allowable value stored in the box portion 12 is exceeded, It is possible to release the water that has entered the sink by the opening provided in the wall and prevent the water from adhering to the back surface of the control board 5 or the like. However, in the above configuration, a wall for preventing water ingress is provided in the outer shell of the main body. And the top part It was not able to type.

  As an example in which the top portion is made thin, and both the infiltration of water and the cooling efficiency are compatible, there is one as disclosed in Patent Document 2. FIG. 8 is a cross-sectional view of a main part showing a conventional built-in induction heating cooker described in Patent Document 2. As shown in FIG. The top plate 2 and the support 14 that supports the top plate 2 from below, the frame 3 that covers the end surface portion of the top plate 2, and the main body 1 are provided. With the structure in which the frame 3 is also provided with the exhaust port 9B at a position corresponding to the exhaust port 9A, it is possible to achieve both overflow and cooling performance with a thin top configuration and keep the space of the top plate 2 wide.

However, even with the above-described configuration, the unevenness between the sink and the top plate is large, and in the case of an induction heating cooker such as stationary, there is a large installation dimension restriction and it is difficult to attach an exhaust configuration outside the main body. In addition, when the top surface of the main body has an exhaust port, it is no longer necessary to stand a wall in order to ensure cooling performance.

JP 11-354263 A JP 2005-265209 A

  The present invention solves the above-mentioned conventional problems, and in a limited installation state, without impairing the function of preventing failure and tracking due to water wetting of internal parts due to water intrusion into the main body, cooling efficiency performance An object of the present invention is to provide a highly reliable induction heating cooker that ensures both cooling performance and overflowing performance.

  In order to solve the above-described conventional problems, an induction heating cooker according to the present invention includes a box-shaped main body having an opening on the upper surface and forming an outer shell, and a cooking container to be heated covering the upper surface of the main body. A top plate, a heating coil that is positioned below the top plate and that heats the cooked container, a control board that controls heating, and a substrate cover that is installed above the control board and holds the heating coil A cooling fan for cooling the heating coil and the control board provided in front of the main body, an air inlet provided in the front of the main body, and the heating coil and control board provided in the rear top surface of the main body. A main wall protruding in the left-right direction and downwardly from the upper surface of the inundation barrier wall with a predetermined distance between the substrate cover and a predetermined front of the main wall. With an interval of A front wall vertically opposed to the right direction, a front opening for guiding the cooling air of the heating coil formed on the front wall to the exhaust port, and a left and right side with a predetermined space behind the main wall A rear wall opposed perpendicularly to the direction, a rear opening formed in the rear wall for discharging cooling air guided from the front opening to an exhaust port, and at least one of left and right ends of the main wall A box-shaped inundation barrier composed of side walls formed in the front-rear direction with a predetermined interval is provided on the substrate cover and disposed in front of the exhaust port.

  With the above configuration, even when water enters from an exhaust port provided on the top surface of the main body, water can be prevented from flowing into the main body by the main wall, front wall, and rear wall of the inundation barrier. Furthermore, not only was the side wall formed in the front-rear direction with a predetermined interval from the left and right end portions of the main wall, but also a configuration in which a space was provided between the lower end portion of the main wall and the substrate cover to which the flood barrier was attached. Since a large exhaust induction path area for the cooling air of the heating coil can be secured, an induction heating cooker with high cooling efficiency can be provided.

  The induction heating cooker of the present invention prevents water from flowing into the main body by the inundation barrier even when water enters from the exhaust port provided on the top surface of the main body. Failure, electric shock, and tracking can be prevented, and the inundation barrier has an exhaust induction path, so cooling efficiency can be improved, and highly reliable induction heating cooking that combines cooling performance and overflow performance Can be provided.

Overall configuration diagram of induction heating cooker in Embodiment 1 of the present invention The principal part block diagram of the inundation barrier of the induction heating cooking appliance in Embodiment 1 of this invention The principal part block diagram of the induction heating cooking appliance in Embodiment 2 of this invention Sectional drawing behind the induction heating cooking appliance in Embodiment 3 of this invention Sectional drawing of the flooding barrier of the induction heating cooking appliance in Embodiment 4 of this invention Perspective view of a conventional induction heating cooker Sectional drawing of the principal part of the conventional built-in induction heating cooking air described in patent document 1 Main part sectional drawing of the conventional built-in induction heating cooking appliance described in patent document 2

  1st invention has the box-shaped main body which has an opening part in the upper surface, and comprises an outer shell, The top plate which covers the upper surface, and mounts a to-be-heated cooking container, It is located under a top plate and a to-be-heated cooking container A heating coil for heating the control board, a control board for controlling heating, a board cover for holding the heating coil, and a cooling fan provided in front of the main body for cooling the heating coil and the control board And an intake port provided in front of the main body and an exhaust port provided in the rear top surface of the main body for exhausting the cooling air that has cooled the heating coil and the control board, and from the upper surface of the inundation barrier to the lower side. Exhaust the main wall that protrudes with a gap between the board cover, the front wall that is perpendicular to the left and right direction with a predetermined space in front of the main wall, and the cooling air from the heating coil formed on the front wall A front opening to guide the air to the mouth; A rear wall that is vertically opposed in the left-right direction with a predetermined interval behind the wall; a rear opening formed in the rear wall for discharging cooling air guided from the front opening to the exhaust port; Provided on the top of the main body by placing a box-shaped inundation barrier wall composed of side walls formed in the front-rear direction at a predetermined distance from at least one of the left and right ends on the substrate cover Even when water enters through the exhaust port, the main wall of the inundation barrier prevents water from flowing into the main unit, preventing breakdowns, electric shocks, and tracking due to water on internal parts and live parts. . Further, by providing a predetermined interval between at least one of the left and right end portions of the main wall of the inundation barrier and the side wall, and further providing a predetermined interval between the lower end portion of the main wall and the substrate cover, It is possible to secure a large exhaust guide path area for the cooling air that has cooled the heating coil, and it is possible to increase the cooling efficiency because the cooling air exhaust of the heating coil is not hindered. Therefore, it is possible to provide a highly reliable induction heating cooker that achieves both cooling performance and overflow performance.

  In the second invention, an attachment surface for attaching the inundation barrier is formed at a position lower than the upper surface of the substrate cover, particularly on the substrate cover rear exhaust port side of the first invention, and the infiltration barrier is attached to the attachment surface. By arranging it in the lower front, the space between the main wall end face of the inundation barrier and the substrate cover can be further increased without changing the height of the main wall, so that the exhaust induction path area of the heating coil can be further increased. While ensuring a large amount and improving the cooling performance, it is possible to maintain the water overflow, and it is possible to prevent malfunctions, electric shocks, and tracking due to wetness of internal components and charging parts.

  According to the third aspect of the present invention, in particular, the flange which is provided on the lower end surface of the main wall of the inundation barrier according to the first aspect of the invention so as to face the substrate cover prevents water entering the main body from the exhaust port. However, since it is received by the flange, water can hardly enter in front of the main wall. Further, even when a long object such as a finger and a spoon is inserted from the exhaust port, the flange can be prevented from entering the front of the main wall, so that it can be prevented from touching a charging part such as a heating coil through which a large current flows.

  According to a fourth aspect of the present invention, in particular, in the first aspect, a power supply board unit having a switching power supply board that inputs a commercial power supply and supplies a DC constant voltage to a control circuit is provided at the rear of the main body. Thus, the effect of preventing water from entering the power supply board unit from the exhaust port can be improved. Moreover, it becomes the structure which a finger | toe, a spoon, etc. do not enter toward a power supply board unit from an exhaust port, and since it does not touch a charging part, an electric shock can be prevented.

According to the fifth aspect of the present invention, in particular, by providing a flange that faces the rear surface of the main body at the end of the side wall of the submerged barrier wall of the fourth aspect of the invention, it is possible to provide the submerged wall with the effect of preventing the rear surface of the main body from falling to the inside of the main body. Can do. Also, if there is no flange, water will enter between the end of the side wall and the rear surface of the main unit. Even in such a case, in order to submerge the power board unit, it is necessary to pass between the flange and the rear surface of the main unit, so that the power board unit can be further prevented from entering the water, and the charging part will not be wetted. It is possible to prevent electric shocks and breakdowns.

  In a sixth aspect of the present invention, in particular, the first aspect includes a frame for supporting the top plate, the frame is provided with an exhaust port, and the frame flange is formed above the extension line formed when the exhaust port is formed. By providing an opening end at the rear opening of the inundation barrier, the rear wall is higher than the extension line of the frame flange even when water is poured into the main body from the exhaust port. In order for water to enter, the water must penetrate above the frame flange extension line. This prevents water from getting over the rear wall and entering the main body, and also prevents water from entering the main body through the frame flange, preventing electric shocks and malfunctions due to water wetting. Can do.

  According to a seventh aspect of the present invention, there is provided a drain hole for allowing the water in the main body to escape to the outside of the main body, particularly on the bottom of the main body of the first invention, and a notch for allowing the water in the submersible barrier to escape is provided on the rear wall of the submersible barrier. As a result, water accumulates in the inundation barrier, passes over the front wall and overflows to the upper surface of the substrate base cover. Since the holes can be released to the outside of the main body, there is no possibility of water entering the heating coil side through which a large current flows, so that it is possible to prevent electric shocks and malfunctions due to water wetting.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 shows the overall configuration of the induction heating cooker according to the first embodiment of the present invention, and FIG. 2 is a main part configuration diagram of the flooded barrier according to the first embodiment.

  The main body 1 bends metal into a box shape, has an opening on the upper side, and installs the top plate 2 on which the cooked utensils arranged so as to cover the upper opening of the main body 1 and the top plate 2 are installed on the main body 1. For this purpose, it is composed of a metal frame 3 having holes for supporting and connecting the top plate 2. In addition, the induction heating cooker of the present invention includes a heating coil 4 for heating a cooking utensil provided below the top plate 2, and the heating coil 4 provided in front of the main body 1 and below the heating coil 4. The cooling fan 7 for cooling the control board 5 is provided, and cooling air is sucked from the intake port 8 provided in front of the main body 1 to cool the heating coil 4 and the control board 5 for controlling the heating. Then, it is set as the structure exhausted from the exhaust port 9 provided on the top | upper surface of the main body 1 back. The control board 5 is held in the main body 1 by a board holding member 15, and a board cover 6 is installed above the control board 5, and the board cover 6 flows water entering from the exhaust port 9 into the main body. In order to attach the inundation barrier 16 to prevent this, the rear exhaust port 9 side of the substrate cover 6 is made lower than the upper surface 13 of the substrate cover to form a step, forming a step wall 26 and an attachment surface 23, and below the exhaust port 9. It is set as the structure arrange | positioned ahead.

Here, as shown in FIG. 2, the inundation barrier 16 is directed downward from the upper surface 24 of the infiltration barrier wall having a height that is sufficient to prevent contact with the top plate 2 and the frame 3. A main wall flange 25 is formed so that the end surface of the main wall 17 is opposed to the mounting surface 23. In addition, the main wall 17 and the front wall 18 which are provided in front of the main wall 17 with a predetermined interval and vertically opposed to each other in the left-right direction, and the front wall 18 for guiding the cooling air of the heating coil 4 to the exhaust port 9. A front opening 19 formed in the rear wall 20, a rear wall 20 which is vertically opposed to the left and right direction with a predetermined interval behind the main wall 17, and cooling air guided from the front opening 19 is supplied to the main wall flange 25 and the substrate. The rear opening 21 formed in the rear wall 20 for passing through a predetermined distance to the mounting surface 23 of the cover 6 and discharging to the exhaust port 9 and at least one of the left and right end portions of the main wall 17 are predetermined. A side wall 22 formed in the front-rear direction is provided in a box shape, is attached to the attachment surface 23 of the substrate cover 6, and is disposed in front of the exhaust port 9.

  With the above configuration, as shown in FIG. 1, the inundation barrier 16 provided on the substrate cover 6 is disposed in front of the lower side of the exhaust port 9, so that the exhaust port 9 provided on the top surface of the main body can be removed. Even when water infiltrates, the main wall 17 of the inundation barrier 16 prevents water from flowing into the main body, so that it is possible to prevent failure, electric shock, and tracking due to water wetting of internal components and the charging unit. Further, a predetermined interval is provided between at least one of the left and right end portions of the main wall 17 of the inundation barrier 16 and the side wall 22, and a predetermined interval is also provided between the main wall flange 25 and the mounting surface 23 of the substrate cover. By providing the interval, it is possible to secure a large exhaust guide path area for the cooling air that has cooled the heating coil 4 guided from the front opening 19, and to smoothly discharge the cooling air from the heating coil 4. Cooling efficiency can also be increased.

  Further, the rear side of the substrate cover 6 on the exhaust port 9 side is made lower than the substrate cover upper surface 13 and the mounting surface 23 of the step wall 26 and the inundation barrier 16 is formed, so that the height of the main wall 17 is not changed. The distance between the main wall flange 25 of the inundation barrier 16 and the substrate cover 6 can be further increased. Further, by making the main wall flange 25 and the substrate cover upper surface 13 at the same height position, it is possible to secure a larger exhaust induction path area of the heating coil 4 and to improve the cooling performance, while maintaining the main wall 17 and the step wall 26. If water does not enter the main body 1 side beyond it, water will not reach the heating coil 4 where a large current flows, so it has excellent water overflow and prevents internal components and live parts from getting wet, preventing electric shocks and tracking. be able to.

  Furthermore, the main wall flange 25 is provided on the lower end surface of the main wall of the inundation barrier 16, so that water to enter the main body 1 from the exhaust port 9 tries to enter from the rear opening 21 of the ingress barrier 16. Since it is received by the main wall flange 25, it is possible to make the structure in which water is less likely to enter the front of the main body than the main wall 17 than when the main wall flange 25 is not provided. In addition, even when a long object such as a finger and a spoon is inserted from the exhaust port 9, the main wall flange 25 is prevented from entering the front of the main wall 17, so that it touches a charging part such as the heating coil 4 through which a large current flows. Can also be prevented.

  As described above, it is possible to provide a highly reliable induction heating cooker that achieves both cooling performance and overflow performance.

(Embodiment 2)
FIG. 3 shows a main part configuration diagram of an induction heating cooker in Embodiment 2 of the present invention.

  In the present embodiment, a power board unit 29 having a switching power board 28 having a commercial power supply as an input and supplying a DC constant voltage to a control circuit or the like is provided on the rear side of the main body of the first embodiment of the present invention. The side wall 22 protrudes from the rear surface of the main body with a gap so that the power supply substrate unit 29 is covered so as not to look through the exhaust port 9. Is different in that it is provided. Others are the same as those in the first embodiment, and thus the description thereof is omitted.

With the above configuration, the effect of preventing water from entering the power supply board unit 29 from the exhaust port 9 can be improved, and a finger, a spoon, etc. from the exhaust port 9 toward the power supply board unit 29 can be improved. Since it does not enter and does not touch the charging part, electric shock can be prevented. Furthermore, by providing the side wall flange 30, it is possible to give the flood barrier 16 the effect of preventing the rear surface of the main body from falling to the inner side of the main body. Further, if the side wall flange 30 is not provided, water enters between the end portion of the side wall 22 and the rear surface of the main body. However, if the flange is present, the structure is surrounded by the side wall 22 and the side wall flange 30. Even when water is intentionally applied obliquely, in order to infiltrate the power supply board unit 29, it is necessary to pass between the side wall flange 30 and the rear surface of the main body. Since the charging part does not get wet with water, it is possible to prevent an electric shock, a failure, etc., and to have a high reliability.

(Embodiment 3)
FIG. 4 shows a cross-sectional view behind the induction heating cooker in Embodiment 3 of the present invention.

  In the present embodiment, the exhaust port 9 is provided in the frame 3 of the first embodiment, and the rear opening formed in the rear wall 20 above the extension line of the frame flange 31 formed when the exhaust port 9 is configured. 21 open ends were provided. Others are the same as those in the first embodiment, and thus the description thereof is omitted.

  With the above configuration, even when water is poured into the main body vigorously from the exhaust port 9, the opening end of the rear opening 21 is higher than the extension line of the frame flange 31. In order for water to enter, the water must enter above the extension line of the frame flange 31. For this reason, in order to prevent water from getting over the rear wall 20 and entering from the rear opening 21 to the main body side, and also to prevent water from entering the main body side through the frame flange 31, Can prevent electric shock and malfunction.

(Embodiment 4)
FIG. 5: shows sectional drawing of the flooding barrier of the induction heating cooking appliance in Embodiment 4 of this invention.

  In the present embodiment, the bottom surface of the main body 1 of the first embodiment is provided with a drain hole 32 for allowing the water in the main body to escape outside the main body, and the water in the submerged barrier 16 is allowed to escape on the rear wall 20 of the submerged barrier 16. The notch 33 was provided. Others are the same as those in the first embodiment, and thus the description thereof is omitted.

  With the above configuration, water accumulates in the inundation barrier 16, gets over the front wall 18, and overflows the board cover upper surface 13, so that the main body is formed by the notch 33 provided in the rear wall 20 of the inundation barrier 16. Since water is poured into the bottom surface of the main body 1 and can be released to the outside of the main body by a drain hole 32 provided on the bottom surface of the main body 1, there is no risk of water entering the heating coil 4 side through which a large current flows. Electric shock and breakdown can be prevented.

  As described above, the induction heating cooker according to the present invention can prevent malfunctions, electric shocks, and tracking due to water wetting of internal parts and charging parts, and the inundation barrier secures an exhaust induction path. It can be applied to uses such as home or commercial induction heating cooking appliances.

DESCRIPTION OF SYMBOLS 1 Main body 2 Top plate 3 Frame 4 Heating coil 5 Control board 6 Substrate cover 7 Cooling fan 8 Intake port 9 Exhaust port 10 Standing wall 11 Sink 12 Box part 13 Substrate cover upper surface 14 Support body 15 Substrate holding member 16 Inundation barrier 17 Main wall 18 Front wall 19 Front opening 20 Rear wall 21 Rear opening 22 Side wall 23 Mounting surface (flooding barrier mounting surface)
24 Infiltration barrier upper surface 25 Main wall flange 26 Step wall 28 Switching power supply board 29 Power supply board unit 30 Side wall flange 31 Frame flange 32 Drain hole 33 Notch

Claims (7)

A box-shaped main body having an opening on the upper surface and forming an outer shell; a top plate that covers the upper surface of the main body and on which the cooked cooking container is placed; and that is located below the top plate and heats the heated cooked container A heating coil for controlling heating, a control board for controlling heating, a board cover for holding the heating coil, and for cooling the heating coil and the control board provided in front of the main body A cooling fan, an intake port provided in front of the main body, and an exhaust port provided on the rear top surface of the main body for exhausting the cooling air that has cooled the heating coil and the control board, and in the left-right direction and the flood barrier. A main wall protruding downward from the upper surface with a predetermined distance from the upper surface; a front wall vertically facing the left and right direction with a predetermined distance in front of the main wall; and the front wall Formed in the A front opening for guiding the cooling air of the coil to the exhaust port, a rear wall vertically opposed in the left-right direction with a predetermined interval behind the main wall, and the cooling air guided from the front opening A rear opening formed in the rear wall and a side wall formed in the front-rear direction at a predetermined interval with at least one of the left and right end portions of the main wall. An induction heating cooker in which an inundation barrier is provided on the substrate cover and arranged in front of the exhaust port. The board cover rear exhaust port side is provided with an attachment surface for attaching a flood barrier at a position lower than the upper surface of the substrate cover, and the flood barrier is disposed on the attachment surface in front of the exhaust port. Induction heating cooker. The induction heating cooker according to claim 1, wherein a flange is provided on the end face of the main wall of the inundation barrier so as to face the substrate cover. A power supply board unit with a switching power supply board that supplies commercial power as input and supplies a DC constant voltage to the control circuit is provided at the rear of the main body, and the side wall of the inundation barrier extends to the back of the main body so that the power supply board unit does not look into the exhaust port. The induction heating cooker according to claim 1, wherein the induction heating cooker is configured so as to be covered. The induction heating cooking appliance of Claim 4 which provided the flange which opposes a rear surface of a main body at the edge part of a flooding barrier side wall. A frame for supporting the top plate is provided, an exhaust port is provided in the frame, and an opening end of the rear opening of the inundation barrier is provided above an extension line of a frame flange formed when the exhaust port is configured. The induction heating cooker according to claim 1. The induction heating cooking according to claim 1, further comprising a drain hole for allowing water in the main body to escape to the outside of the main body on the bottom surface of the main body, and a notch for releasing water in the submersible barrier on the rear wall of the submersible barrier. vessel.