WO2005057985A1

WO2005057985A1 - Induction heating cooker and cooking table using the same

Info

Publication number: WO2005057985A1
Application number: PCT/JP2004/014210
Authority: WO
Inventors: Kazuichi Okada; Koichi Hosoi
Original assignee: Matsushita Electric Industrial Co., Ltd.
Priority date: 2003-12-10
Filing date: 2004-09-29
Publication date: 2005-06-23
Also published as: JP2005174678A; JP4099586B2; CN1875661B; CN1875661A

Abstract

An induction heating cooker includes: an external shell, a heating coil, a power source circuit, a plurality of temperature detection elements, and a control unit for controlling output of the heating coil. The heating coil is arranged in the external shell. The power source circuit has a plurality of heating elements and supplies a high-frequency current to the heating coil. The temperature detection elements respectively detect temperatures of the heating elements. When one of the temperatures detected by the temperature detection elements has reached a temperature predetermined for each of the temperature detection elements, the control unit lowers the output of the heating coil. When one of the temperatures detected by the temperature detection elements is higher than a first temperature and has reached a second temperature predetermined for each of the temperature detection elements, the output of the heating coil is further lowered.

Description

Specification

Induction heating cooker and cooking table using it

Technical field

The present invention relates to an induction heating cooker used by being incorporated in a cabinet such as a kitchen.

Background art

[0002] Conventionally, there is an induction heating cooker that is incorporated in a sink, an intake port is provided on an outer surface facing the inside of the sink, and an exhaust port is provided on the outside of the upper surface of the sink. Such an induction calorie cooker is disclosed, for example, in JP-A-11-354263.

[0003] FIGS. 5 and 6 show a perspective view and a cross-sectional view of the conventional induction heating cooker, respectively. The controller 41 is installed by being dropped into an upper opening 43 of a kitchen cabinet 42, and a heating coil 44, a circuit board 45, and a cooling fan 46 are provided inside the cooker 41. An intake port 47 is provided on a lower surface of the cooker 41, and an exhaust port 48 is provided on a rear side wall of the cooker 41. In this configuration, the intake Z exhaust path necessary for cooling the cooker 41 is established only by dropping the cooker 41 into the opening 43 of the cabinet 42 and fixing it. For this reason, no extra installation work is required inside the cabinet 42, and no partition plate for forming an intake / exhaust path inside the cabinet 42 is required. This configuration is intended for a cooker having only one heating unit.

[0004] In the case where the heating value of the cooking device body is increased, for example, by increasing the output of the heating unit or by employing a configuration having two or more heating units, the heating unit is taken into consideration. What,

Disclosure of the invention

[0005] The induction heating cooker of the present invention has an outer shell, a heating coil, a power supply circuit, a plurality of temperature detecting elements, and a control unit for controlling the output of the heating coil. The heating coil is disposed inside the outer shell, and the power supply circuit has a plurality of heating components and supplies a high-frequency current to the heating coil. The temperature detecting element detects the temperature of a plurality of heat generating components included in the power supply circuit. The controller decreases the output of the heating coil when any of the temperatures detected by the temperature detecting elements reaches a first temperature set in advance for each temperature detecting element. And the temperature detection element detects When any one of the temperatures reaches a second temperature which is higher than the first temperature and is set in advance for each temperature detecting element, the output of the heating coil is further reduced. With this configuration, the total output value of the cooker can be increased. That is, a built-in induction heating cooker having a large calorific value, for example, having a plurality of heating coils is obtained.

Brief Description of Drawings

FIG. 1 is a cross-sectional view of a cooktop including an induction heating cooker according to an embodiment of the present invention.

FIG. 2 is a perspective view of the cooking table shown in FIG. 1.

FIG. 3 is an exploded perspective view of the induction cooking device shown in FIG. 1.

FIG. 4 is an operation explanatory view of the induction heating cooker according to the embodiment of the present invention.

FIG. 5 is a perspective view of a conventional induction heating cooker.

FIG. 6 is a cross-sectional view of a conventional induction heating cooker.

Explanation of symbols

[0007] 1 body

2 Kitchen cabinet

3 Worktop

4 opening

5 Top plate

6 Plate frame

7 outer shell

7A flange 咅

8A, 8B, 8C

9A, 9B, 9C Operation section

10A, 10B heating coil

11 Radiant heater

12 Operation circuit unit

13A, 13B circuit unit

14A, 14B cooling fan A, 15B Inlet

A, 16B Heat sink A, 17B Switching element A, 18B Resonant capacitor A, 19B First temperature sensing element A, 20B Second temperature sensing element A, 21B Third temperature sensing element Exhaust port

Face plate

Crossboard

Packing

Air passage

, 27B vent

Intake filter

ifi board

Kekomi

Exhaust filter

A, 32B Heating temperature detector

Kitchen cabinet opening

Heating coil

Circuit board

cooling fan

Air intake

exhaust port

1 Curve

2, 103 Line 201, 202, 203, 204, 205 points

BEST MODE FOR CARRYING OUT THE INVENTION

[0008] FIGS. 1 and 2 are a sectional view and a perspective view, respectively, of a cooking table including an induction heating cooker according to an embodiment of the present invention, and FIG. 3 is an exploded perspective view of the induction heating cooker.

[0009] The cooker 1 is dropped into the opening 4 provided in the worktop 3 on the upper surface of the kitchen cabinet 2 and incorporated therein. Cooker 1 has a top plate 5 and a plate frame (hereinafter referred to as a frame) 6 surrounding the top plate 5 on the upper surface. The top plate 5 is made of crystallized glass. The upper end of the outer shell 7, which is the part of the cooker 1 that enters the opening 4, is bent into a flange shape and locked to the worktop 3. The top plate 5, the frame 6, and the shell 7 form the outer shell of the cooking device 1. Heating sections 8A, 8B, and 8C are printed on the top plate 5, and operating sections 9A, 9B, and 9C corresponding to the heating sections 8A, 8B, and 8C are arranged in front of the members that make up the top plate 5. ing. The operation units 9A, 9B, and 9C are touch keys of a capacitance type, and when touching the electrode unit printed on the top plate 5, the electric capacitance changes and reacts.

[0010] Heating coils 10A and 10B are arranged inside the outer shell of cooker 1 corresponding to heating units 8A and 8B. A radiant heater 11 is disposed behind heating coils 10A and 10B at positions corresponding to heating section 8C. An operation circuit unit 12 is fixed to the outer shell 7 inside the outer shell of the cooking device 1 corresponding to the operation units 9A, 9B, and 9C. Circuit units 13A and 13B as power supply circuits for supplying high-frequency current to the heating coils 10A and 10B are arranged below the caro heating coils 10A and 10B, respectively. Cooling fans (hereinafter referred to as fans) 14A and 14B are arranged in front of the circuit units 13A and 13B and below the operation circuit unit 12, respectively. Air inlets 15A and 15B are provided on the bottom of the outer shell 7 below the bottom.

[0011] The circuit units 13A and 13B have switching elements 17A and 17B, which are components of an inverter circuit corresponding to the respective heating coils 10A and 10B. The circuit cuts 13A and 13B include heat sinks 16A and 16B for dissipating heat from the switching elements 17A and 17B, resonance capacitors 18A and 18B, and other components. In addition, the circuit units 13A and 13B respectively include a first temperature detecting element (hereinafter, element) 19A, 19B, a second temperature detecting element (hereinafter, element) 20A, 20B, and a third temperature detecting element (hereinafter, element). ) 21A, 21B Have. Elements 19A and 19B are fixed to heat sinks 16A and 16B, respectively. Elements 20A and 20B are located behind resonant capacitors 18A and 18B, respectively. The elements 21A and 21B are arranged behind the circuit units 13A and 13B, respectively. In this configuration, the elements 19A and 19B are fixed to the heat sinks 16A and 16B, and directly detect the temperatures of the switching elements 17A and 17B. Alternatively, the elements 19A and 19B may be attached to the surfaces of the circuit units 13A and 13B close to the terminals of the switching elements 17A and 17B, and the detection may be performed indirectly. The elements 20A and 20B indirectly detect the temperatures of the resonance capacitors 18A and 18B, but may be directly attached to the surface of the resonance capacitors. The elements 21A and 21B detect the ambient air temperature behind the circuit units 13A and 13B, but may be mounted on the surfaces of the circuit units 13A and 13B.

[0012] The frame 6 surrounds the top plate 5 so that the end face of the top plate 5 is not exposed.

An exhaust port 22 is provided on the rear vertical wall surface of the frame 6. That is, the top plate 5 is provided above the outer shell 7 at an interval from the outer shell 7, and the exhaust port 22 is provided between the top plate 5 and the flange portion 7A. The exhaust port 22 is connected to the inside of the cooker 1 via a gap between the back surface of the top plate 5 and the flange 7A at the upper end of the outer shell 7. The outer shape of the top plate 5 is larger than the outer shape of the outer shell 7.

[0013] The cabinet 2 has a crosspiece 24 provided with a ventilation port 27 at the back of the ventilation path 26. The ventilation passage 26 is formed by a gap between the back surface of the worktop 3 at a position recessed from the front end of the worktop 3 and the face plate 23 of the uppermost drawer of the cabinet 2 and a packing 25 between the face plate 23 and the cross plate 24. I have. The gap between the back side of the worktop 3 and the face plate 23 is often about 3 to 5 mm due to the appearance of the kitchen. That is, if the standard width of the kitchen in which cooker 1 is incorporated is 60 cm, the gap area is as small as 15-30 cm ² . At the entrance of the vent 27, an intake filter 28 is provided to prevent insects from entering the kitchen. Further, a ventilation hole 27B may be provided on a step falling surface between the face plate 29 of the lowermost drawer and the kokeomi 30; In the kitchen, packing 25 is placed between the face plate 23 and the kitchen main body to prevent insects, and the confidentiality is high. Therefore, the opening area to the inside of the kitchen is extremely narrow, at least about 15 cm ² , so that the intake and exhaust to and from the cooker 1 must be performed under these conditions. An exhaust filter 31 is inserted into the frame 6 behind the exhaust port 22. It is fixed at.

[0014] The operation and operation of the induction heating cooker configured as described above will be described below.

First, the cooling configuration inside the cooking device 1 will be described. Fans 14A and 14B are arranged in the outer shell 7 at a position below the operation circuit cut 12. The thickness of the cooker 1 is determined by the heating sources such as the heating coils 10A and 10B provided inside and the circuit units 13A and 13B, which are the power supply circuits.Thus, thin fans 14A and 14B are also convenient. .

[0016] It is preferable to use a sirocco fan for the fans 14A and 14B. By using such a fan, the cooling air sucked upward from the air inlets 15A and 15B blows out laterally at the outlet. Then, the gas passes through the back surfaces of the heating coils 10A and 10B and the circuit units 13A and 13B, and is efficiently discharged in one direction toward an exhaust port 22 arranged on the vertical wall surface on the rear side of the frame 6. In this flow path, after cooling the heating coils 10A and 10B as the front heating sources, the air is sent to the radiant heater 11 as the rear heating source. Therefore, the thermal effect of the radiant heater 11 is unlikely to reach the heating coils 10A and 10B, which usually have a heat-resistant temperature of about 150 to 170 ° C. The sirocco fan has a higher static pressure than the axial fan. For this reason, the opening area between the ventilation port 27 and the exhaust port 22 is narrow, which is advantageous in that the pressure loss becomes large, and the cooling air volume is easily secured.

[0017] Fans 14A and 14B are arranged below the operation circuit unit 12, and intake ports 15A and 15B are provided on the bottom surface of the outer shell 7 below the fans 14A and 14B. Therefore, the temperature rise value near the outlets of the fans 14A and 14B is low, and the temperature of the cooling air becomes the ambient temperature of the operation circuit unit 12. Therefore, the temperature rise of the operation units 9A, 9B, and 9C that the user always touches for operation during cooking is suppressed.

Next, the relationship between the detected temperature of the temperature detecting element provided in the circuit unit and the operation of the cooking device 1 such as the output operation of the heating coil will be described with reference to FIG. When cooking is started with a cooking pot placed in the heating section 8A, the water in the pot is generally boiled or heat is passed through the ingredients at the start of cooking. Therefore, the temperature is often raised with the output close to the rated maximum value as the initial setting. Curve 101 in FIG. 4 is, for example, the current after heating and energization of element 19A attached to heat sink 16A that dissipates heat of switching element 17A of circuit unit 13A. Shows temperature behavior.

[0019] The polygonal line 102 indicates the rotation speed (rotation speed) setting of the fans 14A and 14B. Thus, it is preferable that the rotation speed of the fans 14A and 14B can be switched. The fans 14A and 14B individually arranged corresponding to the circuit units 13A and 13B are fans of the same shape, and have the same rotation speed. The fans 14A and 14B are arranged in the same cooking device 1 and share the ventilation path 26 and the exhaust port 22. Therefore, both cooling fans must always operate under the same conditions. Otherwise, the capacity of the cooling fan on the higher capacity side is pressed by the static pressure and the capacity of the other cooling fan stops functioning.

[0020] The polygonal line 103 indicates a change in the output of the heating coil 10A. The temperature axis of the vertical axis of the graph shown in FIG. 4 indicates, for example, the temperature axis of the element 19A. D1 to D6 are control temperatures for switching between the fans 14A and 14B and the output of the heating coil 10A connected to the circuit unit 13A including the element 19A. D1 is the lowest of the control temperatures. In D1, after the heating is started by the heating coil 10A, the rotation speeds of the fans 14A and 14B are switched to the high-speed side as the temperature of the element 19A rises. That is, D1 is a point at which the temperature rise speed in the cooking device 1 is suppressed by increasing the cooling capacity. The temperature of D1 is about 75 ° C to 80 ° C. The rotation speed of fans 14A and 14B should be about 500rpm faster. As a result, the slope of the detection temperature of the element 19A becomes gentle at the point 201 of the curve 101 which becomes D1.

[0021] D2 to D6 are temperatures at which the output of the heating coil 10A is reduced. In the present embodiment, as an example, the temperature of element 19A is reduced by 200 W each time it reaches D6 from D2, and when it reaches D6, the output of heating coil 1OA is stopped. D6 is the temperature at which the control circuit components near element 19A reach near the upper limit of the allowable temperature. Point 202—point 205 on curve 101 corresponds to the case where the detected temperature of element 19A is D2—D5, and for each passing point, the broken line 103 indicating the output change of the heating coil 10A decreases by 200W. ing.

In FIG. 4, after passing through the point 205, the curve 101 indicating the temperature of the element 19A starts to fall, and the output increases by 200 W at the point 206 where the temperature has decreased to D4. Thus, the temperature of the element 19A and the output value of the heating coil 10A uniquely correspond. The higher the output value at the time corresponding to the point 205 is, the more preferable it is. However, if the output value is at least about 1000 W, there will be no major obstacles to the control including the boiling water. Also, the value that reduces the output value is not limited to 200W. Yes. If the output value is maintained at about 12 minutes when the output value is about 1800 W, it is possible to boil about 3 L of water until the point 202 at which the output value lowering operation is performed for the first time.

[0023] Further, in the circuit unit 13A, a total of three temperature detecting elements including the second temperature detecting element 20A and the third temperature detecting element 21A are arranged. Similarly, for the elements 20A and 21A, an independent temperature corresponding to D1 to D6 is determined for each of the temperature detecting elements, and the same operation is performed for each of the temperature detecting elements. Then, the detected temperatures of the elements 19A, 20A, and 21A are simultaneously measured by a temperature detection circuit configured in the circuit cutout 13A. Then, the output of the heating coil 10A is controlled by giving priority to the temperature detection element of the temperature at which the output of the heating coil 10A is set to the lowest among the temperature detection elements. That is, when the operating state of the circuit changes due to the output setting, the material of the pot to be heated, and the like, the cooker 1 operates by detecting the temperatures of a plurality of components having different changes in the temperature rising state. Therefore, the temperature shadow of the object to be heated placed on the top plate 5 is small. The temperature rise of parts depends on the operating conditions such as the material of the pot to be heated and must be set individually. Therefore, the output value for the temperature of the elements 19A, 20A, and 21A is determined for each element based on the operation data.

[0024] Note that heating temperature detection units 32A and 32B are arranged at the center of the caro-heat coils 10A and 10B. The units 32A and 32B detect the temperature of the object to be heated such as a pan via the top plate 5 and detect abnormalities such as an empty bake. These have different purposes, regardless of the operation of detecting the temperature rise of the components of the heating coil power supply circuit unit and reducing the output of the heating coil to keep the component temperature below the allowable value. In the present embodiment, an example in which three temperature detecting elements 19A, 20A, and 21A are provided is described, but the present invention is not limited to this. As long as the rise in the temperature of the components of cooker 1 can be limited, the larger the number, the easier it is to protect more components.

[0025] In the above description, the fans 14A and 14B switch the rotation speed to the high-speed side as the temperature of the element 19A increases. In addition to this, it is sufficient to change the output to the heating coil according to the temperature of the temperature detecting element at a constant speed without switching the cooling fan rotation speed. Even in such a case, the calorific value of the internal components of the cooking device 1 is automatically reduced, and the rated maximum output of the cooking device 1 can be increased. In other words, the cooker 1 is used for cooling. It is cooled by a small amount of air to be secured, and the cross-sectional area of the exhaust port 22 provided in the cooking device 1 and the ventilation path 26 of the cabinet 2 can be reduced. That is, the appearance of the cooker 1 and the cabinet 2 can be simplified. In addition, the area of the exhaust port 22 and the ventilation path 26 is about 15 cm ² to 20 cm ^{2, which is} about one-half to one-third the area of a conventional cooking device.

The switching of the output to the heating coils 10A and 10B and the switching of the rotation speed of the fans 14A and 14B are performed by the circuit units 13A and 13B, respectively. That is, the circuit cuts 13A and 13B constitute a power supply circuit and also control these parts. Alternatively, such a control unit may be provided integrally in the operation circuit unit 12.

[0027] As described above, the cooker according to the present embodiment has heating coil 10A and circuit unit 13A constituting the power supply circuit. Then, a plurality of temperature detecting elements 19A, 20A, and 21A are provided for the heat sink 16A of the switching element 17A, which is a plurality of heat-generating components, and the resonant capacitor 18A, which generate heat according to the operation degree of the circuit unit 13A. It is set up. The element 19A detects the temperature directly by contacting the heat-generating component, and the elements 20A and 21A detect the temperature indirectly by the ambient temperature or the mounting surface temperature near the heat-generating component. When the temperature of any one of the elements 19A, 20A, and 21A reaches the preset first temperature (D2) for each of the temperature detecting elements, the output of the heating coil 10A connected to the circuit unit 13A that has detected the temperature is output. Is controlled in accordance with the detected temperature. Further, when any one of the detection temperatures of the elements 19A, 20A and 21A further rises and the detection temperature is higher than the first temperature and reaches the second temperature (D3) preset for each of the temperature detection elements, the heating coil Further reduce the output of 10A. Note that the temperature set for each of the temperature detecting elements may be different from the temperature set in advance for each of the temperature detecting elements.

[0028] In this configuration, by providing the plurality of heating coils 10A and 10B, the total output value of the cooking device 1 is increased, and even if the calorific value of the cooking device 1 is increased, the internal components of the cooking device 1 are increased. Each time the temperature rises, the heat value is automatically reduced. By cooling cooker 1 with a small air volume, it is possible to reduce the size of exhaust port 22 provided to cooker 1 and ventilation path 26 and vent 27 of cabinet 2, simplifying the appearance of cooker 1 and cabinet 2. become. In addition, the ventilation path 26 and ventilation hole 27 are made smaller, simplifying the appearance of the cooker 1 and cabinet 2. Then, the allowance for the cooling of the cooker 1 is reduced. Here, the temperature is detected by the elements 19A, 20A, and 21A, and the output of the heating coil 10A is reduced according to any one of the detected temperatures reaching a plurality of individually set temperatures. Therefore, it is possible to cope with the temperature change state of the heat-generating component, which changes depending on the material of the pot to be heated. That is, the ventilation path is narrowed to simplify the appearance of the cabinet 2 and the cooker 1, and various pots can be used. In more detail, the heat generated by the resonance circuit, which is composed of a heating coil that can be connected only with an iron or magnetic stainless steel pot, tends to increase! It can also respond to changes in the heat generation state of unit components. In addition, the temperature of the circuit unit component can be kept within the upper limit value and can be used for heating cooking. This effect is effective even when only one heating coil is provided.

Further, in the present embodiment, the rotation speed of fans 14A and 14B can be switched by circuit unit 13A. Then, when the temperature detected by the elements 19A, 20A, and 21A reaches a third temperature (D1) which is set lower than the first temperature (D2), before the output of the heating coil 10A is reduced, the fans 14A, Increase the rotation speed of the 14B than before. Therefore, when the output setting during cooking and the number of heating coils to be used are small and the internal components of the cooking device 1 generate little heat, the rotation speed of the fans 14A and 14B can be reduced. In this case, the noise of cooker 1 is reduced. On the other hand, if the temperature of the heat-generating component continues to rise, the high output time of the cooker 1 is maintained for a long time until the capacity of the fans 14A and 14B can cope with it. Can be reduced. Thus, low noise and high output time can be maintained, and the usability of the cooker is improved.

Further, although not shown in FIG. 4, the temperatures detected by the elements 19A, 20A, and 21A reach a fourth temperature set in advance to be higher than the first temperature (D2) and lower than the second temperature (D3). When reaching, the rotation speed of the fans 14A and 14B may be further increased before the output of the heating coil 10A is reduced. As a result, the time required for the temperature detected by the elements 19A, 20A, and 21A to reach the second temperature (D3) is delayed, so that the heating output is unlikely to decrease and the usability can be improved.

[0031] As described above, the cooking device of the present embodiment has the output control of the heating coil 10A and the fans 14A, 14A. Although both the rotation speed control of B is performed, the output control of the heating coil 10A in D2 may be reduced, and only one of the output control force in D3 and the rotation speed control in D1 may be provided.

[0032] Note that the output of the heating coil 10A and the rotation speed of the cooling fans 14A and 14B are controlled in accordance with the detected temperatures of the elements 19A, 20A and 21A. With the configuration in which the output of the heating coil 2 and the rotation speed of the cooling fans 14A and 14B are similarly controlled in accordance with the temperature, the above-described effects can be similarly exerted. In this case, the fifth temperature-the eighth temperature corresponding to the first temperature-the fourth temperature are set.

Further, in the present embodiment, heating coils 10A and 10B are distributed and arranged in the left and right direction of the outer shell of cooker 1, and fans 14A and 14B are provided corresponding to circuit units 13A and 13B that drive them. 14B is arranged. Normally, when two types of cooking are performed simultaneously, pots are generally placed on the left and right sides and heating units at two places are used. On the other hand, fans 14A and 14B are provided for each of the circuit units 13A and 13B of the heating coils 10A and 10B, and the fans are blown to each. Therefore, when using the heating coils 10A and 10B at the same time for cooking, the temperature rise of the components of the circuit cuts 13A and 13B is reduced, and the output reduction of the cooking device 1 is reduced, thereby improving the usability.

[0034] In the present embodiment, a radiant heater 11, which is a heat source other than the heating coils 10A and 10B, is disposed downstream of the heating coils 10A and 10B. That is, the radiant heater 11 is arranged on the side close to the exhaust port 22, and the thermal effect of the radiant heater 11 reaching the carothermal coils 10A and 10B and the circuit cuts 13A and 13B is reduced.

Further, in the present embodiment, the cooling air in outer shell 7 flows from operation units 9A, 9B, and 9C, which receive setting inputs to cooker 1, to the side opposite to these operation units. That is, the operation units 9A, 9B, and 9C are located on the windward side of the fans 14A and 14B. Therefore, the entire flow of the cooling air in the cooking device 1 becomes linear in one direction, and the number of partitions and wind direction plates provided in the cooking device 1 is reduced, and the internal configuration of the cooking device 1 is simplified. In addition, the temperature inside the cooker 1 and the temperature of the operation parts 9A, 9B and 9C, which are the parts that the user frequently touches on the outside of the cooker 1, are simultaneously reduced.

In the present embodiment, operating members 9 A, 9 B, and 9 C are members that constitute top plate 5. The fans 14A and 14B are arranged below the operation units 9A, 9B and 9C. Thereby, the upper surface of the cooking device 1 including the operation portions 9A, 9B, and 9C can be continuously formed by five top plates. Therefore, careability such as cleaning is improved. In addition, the operation units 9A, 9B, and 9C disposed in the top plate 5 made of a vitreous material and having a high perceived temperature even at the same temperature are cooled directly from the inside of the cooker 1, and operability is maintained.

In the present embodiment, the outer shape of the top plate 5 is larger than the outer shape of the outer shell 7 below the top plate 5. An exhaust port 22 is provided on the side of the frame 6 around the top plate 5. Thereby, the top plate 5 can cover the upper surface of the cooking device 1 other than the frame 6 having an opening on the upper surface of the cooking device 1. In addition, an exhaust passage is secured by a gap formed between the flange 7A at the upper end of the outer shell 7 and the back surface of the top plate 5. Therefore, it is possible to obtain a cooker having an appearance that is easy to care for, for example, boiled-spills having few holes and irregular portions on the upper surface without changing the cooling configuration in the cooker 1.

Further, in the present embodiment, cabinet 2 has a plurality of worktops 3 and face plates 23 and 29 which are a plurality of external members provided on the outside on the front side. An air vent 27 is provided at the back of the step portion or at the back of the gap on the face plate 23 of the uppermost drawer of the cabinet 2. That is, the vent 27 is provided at the back of the gap between the plurality of outer surface materials. Alternatively, a ventilation hole 27B is provided on a step falling surface between the lower surface plate 29 of the lowermost drawer and the button 30. That is, the vent 27B is provided on the back side of the lowermost outer surface material among the plurality of outer surface materials. In this way, the opening such as the door on the outer surface of the cabinet 2 and the gap between the outer surface materials of the drawer constitute the intake port. Thus, the cooking device 1 can be cooled even if the cooling air intake path for the cooking device 1 is secured by the minute gap. That is, there is no need for a dedicated suction space on the outer surface of the cabinet 2. Therefore, the appearance of the cabinet 2 is simplified, and a cooking table with good design can be obtained. At the same time, it is possible to obtain the cooker 1 in which the cooling efficiency of the cooker 1 is ensured and the degree of reduction in the output of the heating coils 1OA and 10B is small and the cooking performance is maintained.

Further, in the present embodiment, filters 28 and 31 are arranged in the vent 27 of the cabinet 2 and the exhaust 22 of the cooking device 1. As a result, foreign substances of a predetermined size or more do not enter the cabinet 2 and the cooking device 1, and at the same time, the wind speeds of the air intake at the ventilation port 27 and the exhaust air at the exhaust port 22 are made uniform, so that the user feels uncomfortable feeling due to the wind. Reduced. In addition, vent 27 and exhaust 22! You may install a ventilation filter only in the gap! ,.

The present invention is not limited by the embodiment.

Industrial applicability

[0041] The induction heating cooker according to the present invention can cope with the case where the amount of heat generated by the regulator increases due to the small ventilation opening required for cooling. The appearance of the cooker and built-in cabinet is simple. This induction heating cooker has only two or more multi-port heating coils, or has a heat source combined with another heat source such as a radiant heater, or has only a heating unit on the top without a grill. In addition, it is suitable for one in which only the upper surface of the cabinet is exposed.

Claims

The scope of the claims

[1] outer shell,

A first heating coil disposed inside the outer shell;

A first power supply circuit arranged inside the outer shell, including a plurality of heat generating components including at least first and second heat generating components, and supplying a high-frequency current to the first heating coil;

A plurality of temperature sensing elements including at least a first temperature sensing element for sensing the temperature of the first heat-generating component, and a second temperature sensing element for sensing the temperature of the second heat-generating component; When the detected temperature! / Or the deviation reaches a preset first temperature for each of the temperature detecting elements, the output of the first heating coil is reduced, and the detected temperature of each of the temperature detecting elements is reduced. //, the deviation further rises, and the detected temperature

An induction heating cooker, comprising: a first control unit that further reduces the output of the first heating coil when the temperature of each of the temperature detection elements reaches a second temperature that is set in advance for each of the temperature detection elements.

[2] a first cooling fan disposed inside the outer shell and cooling the first power supply circuit, wherein the outer shell is

An outer shell provided with an intake port and having a flange portion at an upper end,

A top plate provided above the outer shell at an interval from the outer shell;

An exhaust port is provided between the top plate and the flange portion.

The induction heating cooker according to claim 1.

[3] The first cooling fan can switch the rotation speed,

The first control unit, when any one of the detected temperatures of the first and second temperature detecting elements reaches a third temperature set in advance for each of the temperature detecting elements lower than the first temperature, Increasing the rotation speed of the first cooling fan,

3. The induction heating cooker according to claim 2.

[4] The first control unit is configured such that any one of the detected temperatures of each of the temperature detecting elements is higher than the first temperature and lower than the second temperature, and is set in advance for each of the temperature detecting elements. When the fourth temperature is reached, the rotation speed of the first cooling fan is further increased, The induction heating cooker according to claim 3.

[5] A heat source other than the first heating coil is arranged on a leeward side of the first cooling fan with respect to the first heating coil.

3. The induction heating cooker according to claim 2.

6. An operation unit disposed on the upper surface of the outer shell and arranged on the windward side of the first cooling fan in the outer shell, and further comprising an operation unit for receiving a setting input to the cooking device. An induction heating cooker as described.

[7] An operation unit provided in a member constituting the top plate and receiving a setting input of the cooker,

The first cooling fan is disposed below the operation unit,

3. The induction heating cooker according to claim 2.

[8] A protection frame is provided around the top plate and the exhaust port is provided on a side surface,

The top plate outer shape is larger than the outer shape of the outer shell,

3. The induction heating cooker according to claim 2.

[9] a second heating coil disposed inside the outer shell;

A second power supply circuit disposed inside the outer shell and having a plurality of heating components including at least third and fourth heating components, and supplying a high-frequency current to the second heating coil;

A plurality of temperature detecting elements including at least a third temperature detecting element for detecting a temperature of the third heat generating component, and a fourth temperature detecting element for detecting a temperature of the fourth heat generating component; When any one of the temperatures detected by the temperature detecting elements reaches a preset fifth temperature for each of the third and fourth temperature detecting elements, the output of the second heating coil is reduced, and When one of the detected temperatures of the fourth temperature detecting element further rises, and the detected temperature is higher than the first temperature and reaches a preset sixth temperature for each of the third and fourth temperature detecting elements. A second control unit that further reduces the output of the second heating coil,

The induction heating cooker according to claim 1.

[10] A second cooling fan arranged inside the outer shell and cooling the second power supply circuit, The outer shell

A top plate provided above the outer shell at an interval from the outer shell;

An exhaust port is provided between the top plate and the flange portion.

The induction heating cooker according to claim 9.

[11] The rotation speed of the second cooling fan can be switched,

The second control unit is configured to set a predetermined seventh temperature for each of the third and fourth temperature detection elements in which one of the detection temperatures of the third and fourth temperature detection elements is lower than the fifth temperature. Upon reaching, increase the rotation speed of the second cooling fan,

The induction heating cooker according to claim 10.

[12] The first control unit may be configured to determine whether one of the detection temperatures of the third and fourth temperature detection elements is equal to the third temperature.

When reaching a preset eighth temperature for each of the third and fourth temperature detecting elements higher than the fifth temperature and lower than the sixth temperature, the rotation speed of the second cooling fan is further increased.

An induction heating cooker according to claim 11.

[13] A first cooling fan arranged inside the outer shell for cooling the first power supply circuit and a second cooling fan for cooling the second power supply circuit,

The outer shell

A top plate provided above the outer shell at an interval from the outer shell;

An exhaust port is provided between the top plate and the flange portion,

10. The induction heating cooker according to claim 9, wherein the first and second heating coils are distributed in a lateral direction in the outer shell.

[14] The air conditioner further comprises a ventilation filter arranged at the exhaust port.

The induction heating cooker according to claim 1.

[15] The induction heating cooker according to claim 1, A cabinet provided with an opening on an upper surface for disposing the induction heating cooker,

Cooking table.

[16] The induction heating cooker further includes a cooling fan arranged inside the outer shell and cooling the first power supply circuit,

The outer shell

An outer shell provided with an intake port and having a flange at an upper end; and a top plate provided above the outer shell at an interval from the outer shell.

, And

An exhaust port is provided between the top plate and the flange portion, and the cabinet has a plurality of outer surface materials provided on a front side, a depth of a gap between the plurality of outer surface materials, and the plurality of outer surface materials. Of the outer surface materials, at least 通気ヽ通気通気通気通気通気通気通気通気通気通気最裏裏裏最最

The cooktop according to claim 15.

[17] The air conditioner further comprises a ventilation filter disposed in the ventilation hole.

17. The cooktop according to claim 16.