JP4075873B2 - Induction heating cooker - Google Patents

Description

  The present invention relates to an induction heating cooker having a roaster unit used in general homes, and more particularly to a device having a reduced external surface temperature.

  Conventionally, as this type of induction heating cooker, a partition plate is provided on the outer surface of the roaster heating device excluding the front opening of the roaster heating device that becomes high in temperature, and the box is double-shielded by the partition plate. By providing a cooling air introduction port on a certain partition plate and cooling the roaster heating device with the cooling air introduced from the cooling air introduction port, it is exhausted from the exhaust port on the rear surface of the upper surface of the vessel from the outer side of the vessel back, There was something which cooled a roaster heating device (for example, refer to patent documents 1).

  7 and 8 show a conventional induction heating cooker described in Patent Document 1. FIG. In the figure, heating coils 2 and 3 are arranged inside the main body 1, and a roaster chamber 6 in which the inside of the main body 1 is partitioned by a partition plate 4 and a roaster heating device 5 is arranged at a substantially lower center. ing. Further, a right cooling device 7 and a left cooling device 8 are formed on both sides of the partition plate 4. There is a front right inlet 9 in front of the partition plate 4, and the cooling air flows from the right front inlet 9 toward the roaster heating device 5 by the right cooling device 7, and the space between the roaster heating device 5 and the bottom of the main body 1 is moved from the front to the rear. An instep cooling air passage 11 that is exhausted from the exhaust port 11 is formed. Further, the cooling air flows into the roaster heating device 5 from the right rear introduction port 12 opened to the rear of the partition plate 4, rises upward from below the rear surface of the roaster heating device 5, and is exhausted from the exhaust port 10. A path 13 is formed. Further, the right cooling device 7 constitutes a soot cooling air passage 15 through which the cooling air flows from the front to the rear along the upper surface of the partition plate 4 through the upper side of the right control device 14 and is exhausted from the exhaust port 10. .

By configuring the cooling air passage as described above, the roaster heating device is cooled in a balanced and efficient manner, improving the cooling efficiency of the roaster heating device and suppressing the temperature rise of the heating coil and the control device. It was to be done.
JP 2002-190375 A

  In recent years, with the spread of induction heating cookers, as the cooking range using them expands, there is a need for induction heating cookers that have an even greater output, for example, an increase of about 20%, with the current thermal power. It has become. However, the size of an appliance such as an induction heating cooker that is used in a general kitchen is limited by the size of the kitchen. In particular, in the case of being used in a sink, the dimensions are regulated so that it can be incorporated. Therefore, it was considered to increase the output while maintaining the current dimensions.

  However, in the above-described conventional configuration, the upper cooling air passage 11 and the second cooling air passage 13 that cool the periphery of the roaster heating device 5 pass through the roaster heating device 5 and reach a high temperature, and then enter the exhaust port 10. Since it flows along the outer rear surface 16 of the main body 1 before reaching, the outer rear surface 16 is exposed to high-temperature hot air. Therefore, since the size is regulated, if the output is increased with the conventional size and configuration, the temperature of the exhaust gas is increased and the temperature of the outer rear surface is increased accordingly. For this reason, there is a risk of burns if touched accidentally during use, and in order to prevent this, there has been a problem that the temperature of the rear surface of the outer shell has to be reduced.

  The present invention solves the above-mentioned conventional problems, and prevents the back of the main body located behind the roaster heating device from being directly exposed to the high-temperature exhaust that has cooled the roaster heating device, thereby reducing temperature rise and improving safety. An object of the present invention is to provide an induction heating cooker.

  In order to solve the above-mentioned conventional problems, the induction heating cooker of the present invention is provided with a partition wall that partitions between the back surface of the main body and at least the rear portion of the roaster unit, and provides a ventilation path between the back surface of the main body and the partition wall. The inflow port for securing the inflow of outside air into the ventilation path is provided on the bottom surface of the main body, and the outflow port for allowing the air in the ventilation path to flow out is provided on the back surface of the main body.

  As a result, the high-temperature exhaust that has cooled the roaster section rises along the partition wall and is exhausted from the exhaust port, and the back of the main unit is not directly exposed to the high-temperature exhaust. Since low-temperature outside air flows through the ventilation path provided in, heat transfer from the vicinity of the roaster portion to the back surface of the main body is suppressed, and the temperature of the back surface of the main body is unlikely to rise.

  In the induction cooking device of the present invention, the back surface of the main body located behind the roaster portion is not directly exposed to the high-temperature exhaust gas that has cooled the roaster portion, and the temperature rise on the back surface of the main body can be reduced.

  The first invention comprises a main body constituting an outer shell, a top plate, an air inlet and an exhaust port provided on the upper surface of the main body, a heating coil for heating an object to be heated such as a pan placed on the top plate, and the like An output control unit for controlling the output of the heating coil, a cooling fan provided in the main body, and a roaster unit provided in the main body and forming a portion independent of the output control unit, A partition wall that partitions the rear portion of the roaster portion is provided to secure a ventilation path between the back surface of the main body and the partition wall, and an inlet for allowing outside air to flow into the ventilation path is formed in the bottom surface of the main body. The high-temperature exhaust that has cooled the roaster portion rises along the partition wall and is exhausted from the exhaust port, and the back of the main body is heated at a high temperature. In Since the low temperature outside air flows in the ventilation path provided between the partition wall that becomes hot and the back of the main unit without being exposed, heat transfer from the vicinity of the roaster to the back of the main unit is suppressed. Temperature rise can be reduced.

  According to a second aspect of the present invention, in particular, the induction heating cooker according to the first aspect of the present invention is provided with a second inlet for allowing the outside air to flow into the lower portion of the back surface of the main body, whereby the flow of the bottom surface of the main body is increased. Outside air that flows in from the inlet and rises by natural convection creates a negative pressure in the vicinity of the second inlet on the back of the main body, thereby facilitating the inflow of outside air from the second inlet. This increases the amount of air flow, and can effectively reduce the temperature rise on the back of the main body.

  According to a third aspect of the present invention, in particular, the induction heating cooker according to the first or second aspect of the present invention is configured such that a second outlet is provided at the top of the ventilation path to allow the air in the ventilation path to flow out. Thus, natural convection due to the chimney effect in the ventilation path can be further promoted, and the temperature rise on the back surface of the main body can be effectively reduced.

  According to a fourth aspect of the invention, in particular, the induction heating cooker according to the third aspect of the present invention is provided with the second outlet close to the exhaust outlet, so that the air exhausted from the exhaust outlet by the cooling fan is the first. By generating a negative pressure in the vicinity of the second outlet, the outflow of air from the second outlet is promoted, and the amount of air flow in the ventilation path is further increased, effectively increasing the temperature of the back surface of the main body. The rise can be reduced.

  According to a fifth aspect of the present invention, in particular, the induction heating cooker according to any one of the first to fourth aspects of the present invention is configured such that the distance between the partition wall and the back of the main body is wider near the inflow port and becomes narrower as the distance from the inflow port increases. As a result, the outside air that has flowed in from the inflow port can easily reach the back of the ventilation path, and the temperature distribution on the back surface of the main body can be reduced.

  6th invention interrupts | blocks the heat | fever from a roaster heating apparatus especially by providing the heat insulation layer in the induction heating cooker of any one of Claims 1-5 invention on both surfaces or one side of a partition wall. In addition, the temperature on the back of the main body can be reduced.

  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 is a cutaway plan view of an induction heating cooker according to the first embodiment of the present invention, FIG. 2 is an exploded perspective view of the induction heating cooker, and FIG. 3 is a cross-sectional view of the main part of the induction heating cooker. FIG. 4 shows an external rear view of the induction heating cooker.

  In the figure, 21 is a main body constituting the outer shell, 22 is a top plate provided on the upper surface of the main body 21, and 23 is a top frame that holds the top plate 22. And are provided. Reference numerals 26 and 27 denote heating coils provided below the top plate 22, which heat-cook the object to be heated placed on the top plate 22 by induction heating. An output control unit 28 controls the outputs of the heating coils 26 and 27. Reference numeral 29 denotes a cooling fan that generates cooling air, and reference numeral 30 denotes a roaster unit having a roaster heating device for grilling fish and the like. Reference numeral 31 denotes a main body rear surface located behind the roaster unit 30. Reference numeral 33 denotes a partition wall which is a feature of the present embodiment, and is provided so as to form a ventilation path 34 between the main body back surface 31 and the roaster unit 30. In addition, cooling air that has been heated to a high temperature by cooling the roaster heating device is prevented from entering the ventilation path 34. Reference numeral 39 denotes an inlet for allowing outside air to flow into the air passage 34 and is provided on the bottom surface 40 of the main body. In addition, an outlet 38 constituted by a plurality of openings for allowing the air in the ventilation path 34 to flow out to the outside is provided at the upper part of the main body rear face 31, and outside air flows into the ventilation path 34 at the lower part of the main body rear face 31. A second inflow port 39 composed of a plurality of openings is provided. Reference numeral 35 denotes an internal partition that divides the portion where the output control unit and the cooling fan are arranged from the roaster unit. In this configuration, one end of the partition wall 33 is closely attached to the side surface of the main body 21 and the other end is closely attached to the side surface of the internal partition wall 35. Therefore, the structure of the ventilation path 34 of this Embodiment is divided into the partition wall 33 and the main body back surface 31 at the front and back, the side surface of the main body and the internal partition wall at the left and right, and the upper plate and the main body provided at the upper and lower sides. The structure is partitioned by the bottom surface 40.

  About the induction heating cooking appliance comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, since the cooling fan 29 generates a blowing pressure, the pressure inside the main body 21 is increased, and if there is an opening or a ventilation path in the main body 21, the cooling air from the cooling fan 29 passes through the opening or the ventilation path to the outside of the main body. To discharge. As shown in FIG. 2, the main cooling path in the main body 21 passes from the cooling fan 29 through the output control unit 28, passes through the heating coil 27, and then passes through the left vent hole in the main body 21 to the left of the roaster unit 30. The flow passes through the inner surface of the main body rear surface 31 and reaches the exhaust port 25.

  On the other hand, outside air flowing from the inlet 39 into the ventilation path 34 formed between the partition wall 33 and the back surface 31 of the main body separately from the flow by the cooling fan 29, the outside air passes through the ventilation path 34 and is discharged outside through the outlet 38. . In the course of this natural convection, heat is taken from the partition wall 33 to cool the partition wall 33 to reduce the radiation temperature, and the outside air comes into contact with the main body back surface 31 and cools, so that the temperature can be prevented from rising. In this way, the hot air that has passed around the roaster portion 30 does not flow through the ventilation path 34, and relatively low-temperature outside air is supplied as cooling air, so that the portion of the main body rear surface 31 located behind the roaster portion 30 The temperature decreases.

  As described above, in the present embodiment, outside air flowing from the inlet 39 into the ventilation path 34 formed between the partition wall 33 and the main body back surface 31 separately from the flow by the cooling fan 29. By discharging to the outside through the outlet 38 through the natural convection, heat is taken from the partition wall 33 to cool the partition wall 33 to reduce the radiation temperature, and the outside air contacts the back surface 31 of the main body and cools. Thus, the temperature rise can be suppressed.

  Further, in the present embodiment, the second inflow port 37 is further provided at the lower part of the main body back surface 31, so that the outside air flowing in from the inflow port 39 of the main body bottom surface 40 and rising by natural convection is A negative pressure is generated in the vicinity of the second inlet 37, and the inflow of outside air from the second inlet 37 can be promoted. For this reason, the circulation amount of the air in the ventilation path 34 increases, and the temperature rise of the main body back surface 31 can be reduced more effectively.

  In the present embodiment, as shown in the figure, the distance between the partition wall and the back of the main body is wider near the inflow port 39 and the second inflow port 37, and is configured to become narrower as the distance from them increases. The outside air that has flowed in from the inflow port 39 or the second inflow port 37 easily reaches the back of the ventilation path 33, and the temperature distribution on the back surface of the main body can be reduced.

  In FIG. 4, the second inlet 37 and outlet 38 provided on the rear surface 31 of the main body are uniformly provided on almost the entire surface corresponding to the roaster heating device. Increasing the thickness can improve the cooling efficiency.

(Embodiment 2)
FIG. 5 is a cross-sectional view of an essential part of the induction heating cooker according to Embodiment 2 of the present invention. Since the basic configuration of the present embodiment is the same as that of the first embodiment, different points will be mainly described. The same functions as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The difference between the present embodiment and the first embodiment is that when the first embodiment causes the air in the ventilation path 34 to flow out, it mainly flows out from the second outlet 41 provided at the top of the ventilation path 34. It is.

  In FIG. 5, the outside air flowing into the ventilation path 34 formed between the partition wall 33 and the main body outer rear surface 31 from the inlet 39 and the second inlet 37 passes through the ventilation path 34 and the outlet 38 and the second outlet. Discharge from the outlet 41 to the outside. In the course of this natural convection, heat is taken from the partition wall 33 to cool the partition wall 33 to reduce the radiation temperature, and the outside air comes into contact with the main body back surface 31 and cools, so that the temperature can be prevented from rising.

  As described above, in the present embodiment, the second outlet 41 is provided at the top of the ventilation path 34 and the inlet 39 is provided at the bottom face 40 of the main body. Natural convection can be further promoted, and the temperature rise of the main body back surface 31 can be effectively reduced.

  Further, in the present embodiment, since the second outlet 41 is provided close to the exhaust port 25, the air exhausted from the exhaust port 25 by the cooling fan 29 is negative in the vicinity of the second outlet 41. In order to promote the outflow of air from the second outlet 41 by generating pressure, the amount of air flowing in the ventilation path 34 is further increased, and the temperature rise of the main body back surface 31 is further effectively reduced. be able to.

  As described above, according to the present embodiment, the temperature of the back surface 31 of the main body can be effectively reduced with a simple configuration.

  As described above, in Embodiments 1 and 2, the induction heating cooker having two induction heating units and one roaster unit is described as the induction heating cooker, but the present invention is not limited to this. An induction heating cooker having one section, one radiant heating section and one roaster section, or an induction heating cooker having one roaster section and one or more other heating sections. Of course, it is good.

  Further, according to the present embodiment, the ventilation path 34 is provided between the main body back surface 31 and the partition wall 33, and outside air is introduced into and discharged from this space by various methods using natural convection, or the partition wall 33 is insulated. By providing materials or using them in combination, the temperature of the back surface 31 of the main body can be reduced according to each means. Therefore, since the temperature reduction rate varies depending on the means, it may be determined based on the magnitude of power consumption, the rate of increase in power consumption, or the required reduction temperature.

  As described above, according to the present embodiment, the temperature of the rear surface of the outer shell of the main body can be reduced with a simple configuration and hardly increasing the outer dimensions, so that the practical effect is great.

  In an induction heating cooker having two induction heating sections and one roaster section, when the power consumption is increased by 20% from 4000 W to 4800 W, the temperature of the main body rear surface 31 when the output is increased with the conventional configuration Sometimes exceeded 85 ° C. This is a temperature exceeding 85 ° C. described in “Temperature Limit” in Appendix Table 4 of Appendix 8 of the Electrical Appliance and Material Safety Law. On the other hand, in the configuration of the present embodiment, when the output of the air passage 34 is 20 mm at the lower portion and 10 mm at the upper portion and the output is increased by 20%, the temperature of the back surface 31 of the main body is 75 ° C. and sufficiently satisfies the above standard. . As described above, according to the method of the present embodiment, a sufficient cooling effect can be obtained, and if it is a space of this level, it can be absorbed inside the vessel body, and therefore can be carried out without increasing the outer shape of the vessel body. . Moreover, even if it is necessary to enlarge the container body, it can be substantially about 2 to 3 mm, so that the outer dimensions of the container body can be kept within the regulation values for installation.

  Moreover, even if a heat insulating layer is provided on both surfaces or one surface of the partition wall, the temperature of the main body back surface 31 can be reduced. The width of the heat insulating material may be smaller than the width of the ventilation path 34. If the cooling air is allowed to flow through the gap generated at this time as in the present embodiment, the temperature reduction effect is increased. As a heat insulating material, what consists of a fiber which has heat resistance like glass fiber, a silica fiber, etc. is preferable. In particular, when a vacuum heat insulating material is used as the heat insulating material, the effect is great. It is because the thickness of the heat insulating material can be reduced and the width of the space can be reduced when performing heat insulation to the same extent as when using other heat insulating materials using a vacuum heat insulating material, This is because when the width of the space is constant, the width of the gap after the heat insulating material is inserted becomes large, so that it becomes easy to flow the cooling air when the method of introducing the cooling air is used. In addition, there is a method of filling the space with an inorganic hollow body as a heat insulating material.

  As described above, the induction heating cooker according to the present invention can effectively reduce the outer temperature of the thermal equipment, and therefore can be applied to applications such as a heat treatment furnace and a heating appliance.

The fracture | rupture top view of the induction heating cooking appliance in Embodiment 1, 2 of this invention The exploded perspective view of the induction heating cooking appliance in Embodiment 1, 2 of this invention Sectional drawing of the principal part of the induction heating cooking appliance in Embodiment 1 of this invention The external appearance rear view of the induction heating cooking appliance in Embodiment 1, 2 of this invention Sectional drawing of the principal part of the induction heating cooking appliance in Embodiment 2 of this invention Exploded perspective view of a conventional induction heating cooker Perspective view of the roaster heating device

Explanation of symbols

DESCRIPTION OF SYMBOLS 21 Main body 22 Top plate 24 Intake port 25 Exhaust port 26, 27 Heating coil 28 Output control part 29 Cooling fan 30 Roaster part 31 Main body rear surface 33 Partition wall 34 Ventilation path 37 Second inflow port 38 Outlet port 39 Inlet port 40 Main body bottom surface 41 Second outlet

Claims (6)

A main body constituting the outer shell, a top plate provided on the upper surface of the main body, an intake port and an exhaust port, a heating coil for heating an object to be heated such as a pan placed on the top plate, and an output of the heating coil An output control unit that controls the cooling unit, a cooling fan provided in the main body, and a roaster unit that is provided in the main body and forms a part independent of the output control unit. A partition wall for partitioning is provided to secure a ventilation path between the back surface of the main body and the partition wall, and an inflow port for allowing outside air to flow into the ventilation path is provided at the bottom surface of the main body to allow the air in the ventilation path to flow out. An induction heating cooker provided with a flow outlet of the main body on the back side. The induction heating cooker of Claim 1 which provided the 2nd inflow port for making external air flow in into the lower part of a main body back surface. The induction heating cooking appliance of Claim 1 or 2 which provided the 2nd outflow port for making the air in a ventilation path flow out in the top part of a ventilation path. The induction heating cooker according to claim 3, wherein the second outlet is provided close to the exhaust outlet. The induction heating cooker according to any one of claims 1 to 4, wherein a distance between the partition wall and the back of the main body is wider near the inlet, and becomes narrower as the distance from the inlet increases. The induction heating cooking appliance of any one of Claims 1-5 which provided the heat insulation layer in the both surfaces or one surface of a partition wall.

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