JP3721699B2 - Cooker - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cooking device that heats an object to be heated with a lamp heater provided in the cooking device, and prevents an increase in the temperature of an electrical component, an electronic component, etc., and an increase in the surrounding floor surface temperature.
[0002]
[Prior art]
A conventional cooking device of this type will be described with reference to the configurations shown in FIGS.
[0003]
The stove portion 2 disposed in the lower surface case 1 is provided with a lamp heater 3, a heat insulating plate 4 is disposed around the stove portion 2, and further, the space 5 and the lower surface case 1 together with the space 7. In addition, a heat shield plate 6 is provided, a blower motor 9 having a fan attached to the upper part of the air inlet 8 provided in the lower case 1 is mounted, and a control unit 10 is provided in an adjacent space. . In order to secure the air inflow port 8, foot rubber 11 having a height of several mm is attached to several places of the lower case 1. In addition, an air discharge port 12 is provided behind the lower case 1, and a power plug terminal 13 is provided at a position substantially diagonal to the blower motor 9 with the stove 2 interposed therebetween. In FIG. 6, a heat-resistant glass 16 on which an object to be heated 15 can be placed is placed on the upper case 14 and overlapped with the lower case 1, and several spring members 17 are placed between the heat shield plate 6 below the stove 2. It is provided so that the stove 2 is pressed against the heat-resistant glass 16. The lamp heater 3 of the stove unit 2 is energized by the operation of the control unit 10 and the blower motor 9 is driven to introduce cooling air from the air inlet 8 of the lower case 1, and the stove unit 2, control unit 10, power plug terminal 13, etc. The air was discharged from the air outlet 12 while cooling.
[0004]
[Problems to be solved by the invention]
However, the amount of heat generated by the lamp heater 3 of the stove unit 2 of the conventional heating cooker heats the object to be heated 15 through the heat-resistant glass 16 and cooks the cooked food inside. However, the heat insulating plate 4 surrounding the stove unit 2 is used. The cooling air introduced from the air inlet 8 by the blower motor 9 has a very large amount of heat from the periphery of the lamp, and the temperature of the sealing part of the lamp heater 3 (heat resistance of 350 ° C. or less) and the heat resistance of the electronic parts and electric parts of the control part 10 It is difficult to make the temperature, the standard temperature of the power plug terminal 13 part or lower than the heat resistance temperature, so that the deterioration and life of the lamp heater 3 is accelerated, the failure of electronic and electric parts is induced, or the heat of the power plug terminal 13 There was a problem that could cause contact failure.
[0005]
Furthermore, the heat from the periphery of the heat insulating plate 4 is radiated and thermally transmitted to the heat insulating plate 6 below the heat insulating plate 4 and is prevented from propagating to the lower case 1, but from the surrounding portion outside the heat insulating plate 6. Heat is transmitted to the lower case 1 and the heat heats the floor surface where the cooking device is installed, and the introduced cooling air comes into contact with the stove unit 2 and heat exchanged hot air blows out from the air outlet 12. By heating the floor surface around the cooker, there are problems such as discoloration of the floor surface, discoloration and deformation of the table cloth.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a top case in which a heat-resistant glass on which an object to be heated is placed is disposed on an upper surface, a stove part provided in a lower part of the heat-resistant glass, and a stove part provided in the stove part. Heating means for heating a heated object through the heat-resistant glass, and a heat insulating plate surrounding the stove part, an air guide is disposed under the heat insulating plate through a first air passage , and the air guide The lower case is provided with a lower case through a second air passage, the lower case is provided with an air inlet, and a fan is attached to the upper part. The lower case is further provided with a control unit and a power plug terminal. was decorated by the air inlet and the upper case and the lower surface case rearward around from the vicinity hob unit centered facing rear surface through the stove unit includes a configured air outlet, the cooling air supplied by the blower motor There are those configured such that the exhaust from the air discharge port via said first and second air passages.
[0007]
According to the above invention, the high-temperature heat generated from the heating means (lamp heater) in the stove part can disperse and divert the air guided from the air inlet by driving the blower motor. The cooling of the component parts can be facilitated.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
An upper surface case in which a heat-resistant glass for placing an object to be heated is disposed on the upper surface, a stove part provided at the lower part of the heat-resistant glass, and the object to be heated provided in the stove part is heated via the heat-resistant glass. A heating means and a heat insulating plate surrounding the stove part are provided, an air guide is disposed under the heat insulating plate via a first air passage , and further, a second air passage is provided under the air guide. A lower surface case is provided, an air inlet is provided in the lower surface case, and a fan motor is attached to the upper surface of the lower surface case. Further, the lower surface case is provided with a control unit and a power plug terminal, and the air inlet and the stove unit are provided. the an air outlet constituted by the upper surface case and a lower surface case rearward around from the vicinity hob unit centered facing rear surface through the cooling air which is supplied through the first and second air passages in the air blowing motor Those configured to evacuate from the air discharge port by.
[0009]
And the cooling control in a heating cooker can be performed easily.
[0010]
The air guide provided at the lower part of the heat insulating plate surrounding the stove part is provided with a guide flange having an upward angle with respect to the horizontal axis on the air discharge port side at the rear part of the stove part.
[0011]
Further, since the guide flange having an upward angle is provided, the cooling air that is warmed by heat exchange with the heat insulating plate can be changed upward to be exhausted from the air discharge port , thereby preventing an increase in floor surface temperature.
[0012]
A wind direction flange for diverting the cooling air flow from the air inlet provided at the lower part of the blower motor is disposed on the upper case, and on the side where the control unit on the side of the blower motor mounting portion of the lower case is disposed. A partition flange A is disposed between the stove part and the control part, and a partition flange B is disposed between the stove part and the side surface of the lower case on the side where the power plug terminal is disposed.
[0013]
The cooling control which suppresses the temperature rise of the components in a cooking heater by passage of appropriate cooling air is realized.
[0014]
Embodiments of the present invention will be described below with reference to the drawings.
[0015]
(Example 1)
FIG. 2 is an external top view of the heating cooker according to the first embodiment of the present invention. FIG. 1 is a cross-sectional view of a heating cooker. FIG. 3 is a top view of the stove part with the top case of the heating cooker removed. FIG. 4 is a cross-sectional view of the stove.
[0016]
In the figure, a heat-resistant glass 21 that transmits infrared rays for placing an object to be heated 20 is integrated with an upper surface case 22 and an adhesive, and a lower surface in which a blower motor 24 having a stove 23 and a cooling fan is incorporated. The case 25 and the case 25 are fixed to each other so as to have a vertical relationship.
[0017]
The stove part 23 is provided at the lower part of the heat-resistant glass 21, and the outer surface of the stove part 23 has a bottom shape with an opening at the top and a lamp heater 26 that radiates two infrared rays. It is made of an aluminum material having a high reflectance with respect to infrared rays. The lamp heater 26 is composed of a sealing portion 27 in which both end surfaces of a tungsten filament are sealed with molybdenum foil inside a quartz glass tube, covered with ceramics and fixed with an inorganic adhesive, and the sealing portion 27 is provided outside the stove portion 23. I ’m here.
[0018]
Further, a heat insulating plate 28 is arranged with a gap around the stove portion 23, and is joined at the peripheral portion of the stove portion 23 and the peripheral surface of the heat insulating plate 28 so as to face the surface of the heat resistant glass 21. Are pressed against the back surface of the heat-resistant glass 21 by a spring spring 29, and the bottom surface of the central portion is locally raised to have a bottom shape, and the opening 30 is provided in the raised bottom shape. The temperature sensor 31 is made to face the opening 30 of the raised bottom shape portion and is pressed against the back surface of the heat resistant glass 21 by a spring spring 32.
[0019]
In addition to the temperature sensor 31, the bottom surface near the center of the outer wall of the stove part 23 is locally opened at the top, and on the same axis, the heat insulating plate 28 has a concave shape opposite to the stove part 23, thereby making the temperature sensitivity. A cylindrical heat insulating material 37 is sandwiched in a space coaxial with the portion 33, a temperature sensing portion 33 is provided, a small hole portion 34 is provided in the temperature sensing portion 33, and a temperature thermistor 35 is inserted and fixed by a metal fitting 36. is there.
[0020]
An air guide 39 is disposed below the heat insulating plate 28 via a first air passage 38, and a lower portion thereof faces the lower case 25 as a second air passage 40. The lower surface case 25 is provided with several foot rubbers 41 on the back surface to float the main body itself, and an air inlet 42 is provided in a part of the lower surface case 25, and a blower motor 24 with a fan attached to the upper portion is provided.
[0021]
The blower motor 24 is located in the left corner portion in front of the lower surface case 25, and a control unit 43 that controls the lamp heater 26 is disposed adjacent to the blower motor 24 on the right front side of the lower surface case 25. Yes. In addition, a power plug terminal 44 for supplying electricity is disposed on the left rear portion of the lower surface case 25 in order to be close to the blower motor 24. A wind direction flange 45 is formed on the fan outlet side of the blower motor 24 so as to be positioned directly above the blower motor 24 when the upper case 22 is joined. A partition flange A46 is formed on the lower case 25 side along the circular stove between the control unit 43 and the stove 23, and the stove between the power plug terminal 44 and the blower motor 24 is formed. 23 and the left side of the lower case 25 and a space, a partition flange B47 is formed. Further, the lower case 25 and the upper case 22 form a substantially circular fan shape on the rear side of the stove part 23, and form an air discharge port 48 having a radial opening on the rear side of the vicinity of the central axis of the stove part 23. . The air guide 39 forms a guide flange 49 having an upward angle with respect to the horizontal axis behind the stove and faces the air discharge port 48 side. 50 is a heating start key, and 51 is a base on which the heating cooker body is installed.
[0022]
The operation will be described with reference to the configuration of FIGS. The cooking device starts energization by pressing the heating start key 50. A plurality of lamp heaters 26 inside the stove unit 23 generate heat, and radiant heat is transmitted through the heat-resistant glass 21 directly above, and the heated object 20 such as a tempura pan is heated by conduction and radiation. Although the surface of the stove part 23 does not use a heat insulating material, it is a parabolic shape made of an aluminum material having a high reflectivity with respect to infrared rays, and the temperature sensor 31 is locally raised and faced to the opening 30 as a bottom part. The radiant heat from the lamp heater 26 is reduced to bring it closer to the same performance as that using a heat insulating material. That is, the influence of heat on the temperature sensor 31 can be reduced. Further, the temperature thermistor 35 provided in the temperature sensing portion 33 of the heat insulating plate 28 can reduce the radiant heat by using the space between the heat insulating material 37 and the lamp heater 26 and reduce the influence of the heat. Accordingly, as a slight thermal effect from the lamp heater 26, the temperature rise of the oil of the article to be heated 20 and the temperature thermistor are received by receiving the heat from the temperature sensing part 33 and from the small hole part 34 through the heat-resistant glass 21. The temperature rise gradient of 35 can be approximated (with less delay in response time), satisfactory tempura and fried food can be heated at an appropriate temperature (eg 200 ° C) in oil heating, and abnormal due to some conditions When the temperature of the temperature sensor 31 reaches the temperature (for example, 270 ° C.) previously input to the control unit 44 in the case of overheating, the heating means is automatically stopped.
[0023]
Simultaneously with the control of the lamp heater 26, it is necessary to drive the blower motor 24 having a cooling fan to cool the components in the heating cooker. A case in which cooling air from the air inlet 42 provided in a part of the bottom surface portion from the space secured by the foot rubber 41 provided on the back side of the lower surface case 25 is composed of the lower surface case 25 and the upper surface case 22 from the outlet of the blower motor 24. Introduced inside. First, the air is diverted in two directions by the wind direction flange 45 provided in the upper case 22. In the flow A and the flow B, the flow A is divided into a flow A1 and a flow A2 by a partition flange A46 provided between the control unit 43 and the stove unit 23. The flow A1 of the cooling air passes through the control unit 43, cools the electronic components and electrical components stored in the control unit 43, and is discharged from the rear air discharge port 48 while maintaining the components within the standard temperature. The flow A2 passes between the partition flange A46 and the stove part 23 covered with the heat insulating plate 28, and the lower case 25 and the upper case 22 covered with the resin by heat radiation and conduction heat emitted from the stove part 23 are heated. It suppresses the rise, prevents thermal deformation and thermal discoloration, and also applies cooling air to the sealing part 27 of the lamp heater 26 in the stove part 23, thereby suppressing conduction heat from the quartz glass tube and sealing. By setting the heat resistant temperature of the molybdenum foil of the portion 27 to 350 ° C. or less, the lamp heater 26 is prevented from being deteriorated and disconnected, and the life is extended.
[0024]
On the other hand, the flow B is divided by the partition flange B47 into a flow B1 passing through the stove 23 and a flow B2 passing through the power plug terminal 44. The flow B1 of the cooling air forms a flow to the stove part 23 opposite to the flow on the stove part 23 side of the flow A2 to reduce the temperature of the sealing part 27, and the flow B2 is positioned behind the partition flange B47. A straight flow that directly hits the power plug terminal 44 is formed, the temperature of the contact portion with the power plug is suppressed, the operating temperature standard is 100 ° C. or less, the flow B1 is joined, and the air is discharged from the air discharge port 48. The
[0025]
In addition, an air guide 39 is disposed below the heat insulating plate 28 surrounding the stove 23 via a spring spring 29, and a part of the cooling air from the blower motor 24 is second below the air guide 39 . The flow C passing through the first air passage 38 and the flow D passing through the upper first air passage 38 are formed. This flow C passes between the air guide 39 and the lower case 25 and cools to a temperature range in which the resin of the lower case 25 is not deformed or discolored, and the flow D uses the cooling air to radiate heat or conduction heat from the heat insulating plate 28 with the air guide. The temperature rise of 39 is prevented. The heat-exchanged warm air changes the air flow by the upward guide flange 49 at the tip of the air guide 39 to create an upward flow, and is discharged from the air discharge port 48. Therefore, the temperature rise of the heat from the heat insulating plate 28 is suppressed by the air guide 39, the air flow C, and the flow D, and the temperature of the base 51 on the lower surface of the cooking heater body can be reduced. Further, since hot air from the air discharge port 48 is also discharged upward, there is no air flow that licks the base 51, so that the temperature of the base 51 around the cooking heater can be reduced, and deformation and discoloration can be prevented.
[0026]
【The invention's effect】
As described above, according to the heating cooker of the present invention, the following effects can be obtained.
[0027]
(1) The cooling air inserted from the air inlet of the bottom surface of the bottom case forms an air flow along the entire periphery including the bottom surface of the heat insulating plate surrounding the stove having the heat source, and is behind the central position of the stove The hot air is discharged while being uniformly distributed from all the air outlets, so the local hot part inside the heating cooker is eliminated, the hot air temperature is reduced, and the hot air speed is not concentrated in one direction, The entire heating cooker including the upper case eliminates local high temperature parts, prevents burns, prevents deformation and melting of the resin case, and eliminates discomfort caused by warm air to surrounding people.
[0028]
(2) The heat released from the heat insulating plate surrounding the stove part forms a two-layer air passage by an air guide to prevent heat conduction to the lower case and suppress the rise in the temperature of the floor surface. It is possible to prevent thermal deformation and discoloration. In addition, by making the guide flange provided behind the air guide at an angle upward, the heat of the heat insulating plate is converted into an air flow that flows upward and is discharged from the air discharge port, so that the floor surface that is the base is The air flow to be licked disappears and the rise of the floor temperature around the outside is suppressed, and thermal deformation and discoloration are prevented.
[0029]
(3) The flow of cooling air is divided and divided by a wind direction flange provided on the upper surface case of the upper part of the blower motor, and the cooling air is further divided by providing a partition flange A and a partition flange B on the lower surface case on the leeward side. (A) Suppression of temperature rise of electronic parts and electric parts in the control part, (b) Cooling the heat quantity from the heat insulating plate surrounding the stove part, and suppressing the temperature rise of the sealing parts at both ends of the lamp heater. Achieves a long life of the heater. (C) By applying a part of the cooling air directly to the power plug terminal portion, the operating temperature limit of the contact portion can be secured, and the contact failure can be prevented.
[Brief description of the drawings]
1 is a cross-sectional view of a heating cooker in Embodiment 1 of the present invention. FIG. 2 is a top view of the heating cooker. FIG. 3 is a top view of a bottom case of the heating cooker. Enlarged sectional view of the stove part of the cooker [FIG. 5] A top view of the inside of the lower case of the cooking device in the conventional example [FIG. 6] Configuration diagram of the cooking device [Explanation of symbols]
20 Heated object 21 Heat-resistant glass 22 Upper surface case 23 Stove section 24 Blower motor 25 Lower surface case 26 Lamp heater (heating means)
28 Heat Insulation Plate 38 First Air Passage 39 Air Guide 40 Second Air Passage 42 Air Inlet 43 Controller 44 Power Plug Terminal 45 Air Direction Flange 46 Partition Flange A
47 Partition flange B
48 Air outlet 49 Guide flange

Claims (3)

An upper surface case in which a heat-resistant glass for placing an object to be heated is disposed on the upper surface, a stove part provided at the lower part of the heat-resistant glass, and the object to be heated provided in the stove part is heated via the heat-resistant glass. A heating means and a heat insulating plate surrounding the stove part are provided, an air guide is disposed under the heat insulating plate via a first air passage , and further, a second air passage is provided under the air guide. A lower surface case is provided, an air inlet is provided in the lower surface case, and a fan motor is attached to the upper surface of the lower surface case. Further, the lower surface case is provided with a control unit and a power plug terminal, and the air inlet and the stove unit are provided. the an air outlet constituted by the upper surface case and a lower surface case rearward around from the vicinity hob unit centered facing rear surface through the cooling air which is supplied through the first and second air passages in the air blowing motor Heating cooker configured to evacuate from the air discharge port by. Air guide provided in the insulating plate bottom surrounding the stove part became warm insulated plate heat exchanger by obtaining Bei the guide flange which gave an upward angle relative to the horizontal axis at the air outlet side of the stove rear part The heating cooker according to claim 1, wherein the cooling air is changed upward to be exhausted from the air discharge port . A wind direction flange for diverting the cooling air flow from the air inlet provided at the lower part of the blower motor is disposed on the upper case, and on the side where the control unit on the side of the blower motor mounting portion of the lower case is disposed. The partition flange A is disposed between the stove part and the control part, and the partition flange B is disposed between the stove part and the side surface of the lower case on the side where the power plug terminal is disposed. Cooking device.

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