Grill device and induction heating cooker
By using multiple thermometers and relays outside the heating chamber to control the electrical connection of the heating unit, the problem of rising manufacturing costs is solved, and the effect of improving safety without increasing costs is achieved.
Patent Information
- Application Number
- JP2023123841
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-07-28
- Publication Date
- 2025-02-07
AI Technical Summary
In the prior art, high heat-resistant materials and lines that are added to improve safety lead to an increase in manufacturing costs.
A plurality of thermometers and relays located outside the heating chamber are used to control the electrical connection of the heating unit, including a first relay and a second relay, respectively, and the power supply is cut off at different temperature thresholds to avoid the use of high heat-resistant materials and circuits.
Without increasing manufacturing costs, safety is improved to prevent overheating of the heater due to user misuse or abnormal situations, ensuring the safety of the equipment.
Smart Images
Figure 2025019928000001_ABST
Abstract
Description
[Technical field]
[0001] The present disclosure relates to a grill device and an induction heating cooker. [Background technology]
[0002] Patent Document 1 discloses a grill device that includes a heating chamber, an upper burner, a lower burner, a temperature detector, and a controller. The upper burner and the lower burner heat a cooking container placed in the heating chamber. The temperature detector detects the temperature inside the heating chamber. The controller controls the heat of the upper burner and the lower burner based on the temperature detected by the temperature detector. [Prior art documents] [Patent documents]
[0003] [Patent Document 1] JP 2020-180748 A Summary of the Invention [Problem to be solved by the invention]
[0004] In recent years, there has been a demand for grill devices and induction heating cookers that can improve safety while suppressing increases in manufacturing costs.
[0005] Therefore, an object of the present disclosure is to solve the above-mentioned problems and to provide a grill device and an induction heating cooker that can improve safety while suppressing increases in manufacturing costs. [Means for solving the problem]
[0006] The grilling device according to one aspect of the present disclosure comprises: A heating chamber; A cooking vessel disposed within the heating chamber; A heating unit that heats the cooking container; A plurality of thermostats are disposed outside the heating chamber and electrically connected to the heating unit; Equipped with The plurality of thermostats include a first thermostat that cuts off electrical connection with the heating unit at a temperature equal to or higher than a first threshold; a second thermostat that is different from the first thermostat and that cuts off electrical connection with the heating unit at a temperature equal to or higher than a second threshold; Includes.
[0007] An induction heating cooker according to one aspect of the present disclosure includes: The grill device is as described above. Effect of the Invention
[0008] According to the present disclosure, it is possible to provide a grill device and an induction heating cooker that can improve safety while suppressing increases in manufacturing costs. [Brief description of the drawings]
[0009] [Figure 1] 1 is a schematic perspective view of an example of an induction heating cooker according to a first embodiment of the present disclosure. [Diagram 2] 1 is a schematic block diagram showing an example of a main configuration of an induction heating cooker according to a first embodiment of the present disclosure. [Diagram 3] 1 is a schematic block diagram showing an example of a main configuration of a grill device according to a first embodiment of the present disclosure. [Figure 4] 1 is a schematic perspective view of an example of a grill device according to a first embodiment of the present disclosure. [Diagram 5] 1 is a schematic perspective view of an example of a grill device according to a first embodiment of the present disclosure. [Figure 6] 1 is a schematic rear view of an example of a grill device according to a first embodiment of the present disclosure. [Figure 7] 7 is a schematic cross-sectional view of the grill device shown in FIG. 6 taken along line AA. [Figure 8] 7 is a schematic cross-sectional view of the grill device shown in FIG. 6 taken along line BB. [Figure 9] FIG. 9 is a schematic enlarged view of a portion Z1 in FIG. 8. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0010] (Background to this disclosure) For example, as a grill unit of an induction heating cooker, a grill device is known that includes a heater, a temperature detection unit that detects temperature information inside a heating chamber, and a control unit that controls the heater based on the temperature information detected by the temperature detection unit.
[0011] In such grill devices, as a safety measure against abnormalities such as fire, the control unit detects abnormalities such as fire based on temperature information within the heating chamber detected by the temperature detection unit and stops heating by the heater. The temperature detection unit is disposed within the heating chamber to detect the temperature within the heating chamber. For this reason, a temperature detection unit with relatively high heat resistance is used. Furthermore, since the control unit obtains temperature information from the temperature detection unit, lead wires are used to connect the control unit and the temperature detection unit. Since the lead wires are disposed around the outside of the heating chamber, lead wires with relatively high heat resistance are used.
[0012] However, components such as a temperature detection unit and / or lead wires having high heat resistance are relatively expensive, which increases the manufacturing cost.
[0013] Therefore, after extensive research, the inventors discovered a grill device configuration that uses multiple thermostats placed outside the heating chamber, leading to the present disclosure.
[0014] Hereinafter, an embodiment of the present disclosure will be described with reference to the accompanying drawings. Note that the following description is merely illustrative in nature and is not intended to limit the present disclosure, its application, or its uses. Furthermore, the drawings are schematic, and the ratios of dimensions, etc. do not necessarily correspond to the real ones.
[0015] It should be noted that, in this specification, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as expressing or implying the relative importance or ranking of technical features. Features qualified as "first" and "second" expressly or imply the inclusion of one or more of that feature.
[0016] (Embodiment 1) [Overall configuration] Fig. 1 is a schematic perspective view of an example of an induction heating cooker 1 according to the first embodiment of the present disclosure. Fig. 2 is a schematic block diagram showing an example of a main configuration of the induction heating cooker 1 according to the first embodiment of the present disclosure. Note that the XYZ coordinate system shown in the figure is for aiding in understanding the invention and does not limit the invention. The X-axis direction indicates the left-right direction, the Y-axis direction indicates the front-rear direction, and the Z-axis direction indicates the vertical direction.
[0017] 1, the induction heating cooker 1 includes a top plate 2, a housing 3, an operation unit 4, and a grill device 5. In addition, as shown in FIG. 2, the induction heating cooker 1 includes a heating coil 6 and a power supply unit 7.
[0018] <Top plate> An object to be heated is placed on the top plate 2. The top plate 2 is made of, for example, a rectangular heat-resistant glass.
[0019] <Case> The housing 3 is disposed below the top plate 2. The housing 3 includes a first housing 31, a second housing 32, and a third housing 33.
[0020] The first housing 31 is disposed below the top plate 2. The first housing 31 also houses the heating coil 6 and the power supply unit 7.
[0021] The second housing 32 is disposed below the first housing 31. The second housing 32 is disposed on the right side in the left-right direction (X direction) of the housing 3. The second housing 32 houses the operation unit 4.
[0022] The third housing 33 is disposed below the first housing 31. The third housing 33 is disposed on the left side in the left-right direction (X direction) of the housing 3. The third housing 33 is disposed adjacent to the second housing 32 in the left-right direction of the housing 3. The third housing 33 houses the grill device 5.
[0023] <Operation section> The operation unit 4 moves between a closed position where it is stored inside the housing 3 and an open position where it is pulled out to the outside of the housing 3. The operation unit 4 is disposed in the second housing 32. Specifically, the operation unit 4 is disposed on the front side of the second housing 32. In this embodiment, the operation unit 4 operates the grill device 5.
[0024] The operation unit 4 is a device that accepts operations by a user. For example, the operation unit 4 has buttons, a touch panel, and / or switches that can be operated by a user's finger. The operation unit 4 may also have a display device such as a display.
[0025] <Grilling device> The grill device 5 is a grill unit housed in the housing 3. The grill device 5 heats food placed inside the grill device 5. The grill device 5 is disposed in the third housing 33, and constitutes the front side of the induction heating cooker 1. A detailed configuration of the grill device 5 will be described later.
[0026] <Heating coil> The heating coil 6 is disposed in the housing 3, and induction heats an object to be heated placed on the top plate 2. For example, the heating coil 6 heats an object to be heated, such as a pan, by electromagnetic induction. The output of the heating coil 6 is controlled, for example, by an inverter. The heating coil 6 is composed of one or more heating coils. The heating coil 6 is disposed in the first housing 31. In this embodiment, an operation unit is provided on the top surface of the top plate 2, and heating by the heating coil 6 is operated by the operation unit provided on the top surface of the top plate 2.
[0027] <Power supply unit> The power supply unit 7 is housed within the housing 3. The power supply unit 7 includes a power supply circuit that supplies power to the grill device 5. Specifically, the power supply unit 7 is housed in the first housing 31.
[0028] The operation unit 4, grill device 5, heating coil 6, and power supply unit 7 are controlled by a control unit. The control unit includes, for example, a memory that stores a program, and a processing circuit corresponding to a processor such as a CPU (Central Processing Unit). In the control unit, the processor executes the program stored in the memory. That is, the control unit includes one or more processors, and a memory that stores instructions to be executed by the one or more processors.
[0029] [Details of the grill device configuration] Fig. 3 is a schematic block diagram showing an example of a main configuration of grill device 5 according to embodiment 1 of the present disclosure. Figs. 4 and 5 are schematic perspective views of an example of grill device 5 according to embodiment 1 of the present disclosure. Fig. 6 is a schematic rear view of an example of grill device 5 according to embodiment 1 of the present disclosure. Fig. 7 is a schematic cross-sectional view of grill device 5 shown in Fig. 6 taken along line AA. Fig. 8 is a schematic cross-sectional view of grill device 5 shown in Fig. 6 taken along line BB. Fig. 9 is a schematic enlarged view of portion Z1 in Fig. 8.
[0030] 3, grill device 5 includes heating chamber 51, cooking container 52, heating unit 53, and multiple thermostats 61, 62. Heating unit 53 is electrically connected to power supply unit 7 via multiple thermostats 61, 62, and is supplied with power from power supply unit 7. Heating unit 53, multiple thermostats 61, 62, and power supply unit 7 are connected in series.
[0031] <Heating chamber> Heating chamber 51 is a grill chamber and has a box shape with an open front. Heating chamber 51 houses cooking container 52. An opening / closing door 51a is disposed in front of heating chamber 51. Opening / closing door 51a moves in the front-rear direction (Y direction) of grill device 5.
[0032] As shown in Figs. 4 to 7, the heating chamber 51 is provided with an exhaust pipe 54 for exhausting air from within the heating chamber 51. The exhaust pipe 54 is provided on the back surface 51b of the heating chamber 51. Specifically, the exhaust pipe 54 is provided on the central upper side of the back surface 51b of the heating chamber 51 when viewed from the back surface 51b side of the heating chamber 51. The exhaust pipe 54 extends upward from the back surface 51b of the heating chamber 51 and has an exhaust port on the upper surface of the induction heating cooker 1. In addition, a thermistor 60 is disposed in the exhaust pipe 54. The control unit adjusts the temperature within the heating chamber 51 based on temperature information detected by the thermistor 60. Specifically, the control unit controls the heating by the heating unit 53 based on temperature information detected by the thermistor 60.
[0033] As shown in FIGS. 7 and 8, the heating chamber 51 includes an inner casing 55 and an outer casing 56.
[0034] The inner housing 55 houses the cooking container 52. The inner housing 55 has a box shape with an open front.
[0035] The outer housing 56 is disposed outside the inner housing 55. The outer housing 56 has a box shape with an open front. The outer housing 56 is disposed around the inner housing 55 except for the front surface.
[0036] The inner bottom surface of heating chamber 51 is flat because lower heater 53a is disposed outside the chamber, which makes cleaning and other maintenance easy.
[0037] <Cooking container> 7 and 8, cooking container 52 is a container for placing an item to be heated. Cooking container 52 is placed inside heating chamber 51. Specifically, cooking container 52 is placed inside inner housing 55 of heating chamber 51. Cooking container 52 is attached to opening / closing door 51a, and moves with the movement of opening / closing door 51a.
[0038] Cooking vessel 52 includes a vessel bottom 52a and a vessel sidewall 52b extending upwardly from an outer edge of vessel bottom 52a.
[0039] The container bottom 52a has a substantially rectangular shape in a plan view. The container bottom 52a has projections and recesses.
[0040] The container side wall 52b surrounds the outer edge of the container bottom 52a in a plan view.
[0041] <Heating part> Heating unit 53 heats cooking container 52. As shown in Fig. 3, heating unit 53 is electrically connected to power supply unit 7 via a plurality of thermostats 61, 62. Heating unit 53 is a heat generating element that receives electric power from power supply unit 7 and generates heat. For example, heating unit 53 is a heater.
[0042] As shown in FIG. 7, the heating unit 53 includes a lower heater 53a and an upper heater 53b.
[0043] Lower heater 53a is disposed below cooking container 52 and heats cooking container 52 from below. Lower heater 53a heats the food placed in cooking container 52 from below. For example, lower heater 53a is disposed below inner housing 55 of heating chamber 51, between inner housing 55 and outer housing 56.
[0044] Upper heater 53b is disposed above cooking container 52 and heats cooking container 52 from above. Upper heater 53b heats the food placed in cooking container 52 from above. For example, upper heater 53b is disposed inside inner housing 55 of heating chamber 51 and above cooking container 52.
[0045] <Multiple Thermostats> 3, the multiple thermostats 61, 62 are electrically connected to the heating unit 53. Specifically, the multiple thermostats 61, 62 are located between the heating unit 53 and the power supply unit 7, and are electrically connected to the heating unit 53 and the power supply unit 7. The first thermostat 61 or the second thermostat 62 cuts off the electrical connection between the heating unit 53 and the power supply unit 7.
[0046] The multiple thermostats 61, 62 include a first thermostat 61 and a second thermostat 62.
[0047] The first thermostat 61 is electrically connected to the heating unit 53, and cuts off the electrical connection with the heating unit 53 at a temperature equal to or higher than a first threshold. Specifically, the first thermostat 61 is electrically connected to the heating unit 53 and the power supply unit 7, and cuts off the electrical connection between the heating unit 53 and the power supply unit 7 at a temperature equal to or higher than the first threshold. For example, the first threshold is set arbitrarily within a range of 140°C or higher and 180°C or lower. Preferably, the first threshold is set arbitrarily within a range of 150°C or higher and 160°C or lower.
[0048] After the electrical connection between the heating section 53 and the power supply unit 7 is cut off, the first thermostat 61 restores the electrical connection when the temperature falls below a return temperature that is lower than the first threshold. For example, the return temperature is equal to or higher than room temperature and lower than the first threshold. Room temperature means a natural temperature without cooling or heating. For example, room temperature may be defined in the range of 5°C to 35°C. For example, the return temperature is set arbitrarily in the range of room temperature to 160°C. The return temperature may be set to a temperature that is 20°C less than the temperature of the first threshold. For example, when the first threshold is 140°C, the return temperature may be 120°C. When the first threshold is 180°C, the return temperature may be 160°C.
[0049] In this way, when the temperature reaches or exceeds the first threshold value, first thermostat 61 cuts off the electrical connection between heating section 53 and power supply unit 7, and stops heating by heating section 53. When detecting that heating by heating section 53 has stopped, the control section may control the display device of operation section 4 to display a message notifying an error. After cutting off the electrical connection, first thermostat 61 restores the electrical connection between heating unit 53 and power supply unit 7 when the temperature falls below the return temperature. As a result, when the temperature inside heating chamber 51 becomes equal to or higher than the first threshold value, heating by heating unit 53 is stopped, and when the temperature inside heating chamber 51 falls below the return temperature, heating by heating unit 53 is enabled.
[0050] The first thermostat 61 can temporarily stop the heating of the heating section 53 when the temperature inside the heating chamber 51 rises due to misuse by the user or the like.
[0051] For example, when heating is performed by the heating unit 53 with the front door 51a of the heating chamber 51 open, relatively hot air comes out from the front side of the heating chamber 51. For this reason, the thermistor 60 arranged in the exhaust pipe 54 cannot detect the temperature inside the heating chamber 51 normally. Specifically, since the relatively hot air inside the heating chamber 51 does not pass through the exhaust pipe 54, the thermistor 60 detects a temperature lower than the temperature inside the heating chamber 51. For this reason, when the control unit controls the heating of the heating unit 53 based on the temperature detected by the thermistor 60, the cooking vessel 52 is overheated. Also, when the exhaust port of the exhaust pipe 54 is blocked, the cooling air may flow back into the exhaust pipe 54. In this case, the thermistor 60 detects a temperature lower than the temperature inside the heating chamber 51. For this reason, when the control unit controls the heating of the heating unit 53 based on the temperature detected by the thermistor 60, the cooking vessel 52 is overheated. In this way, if the cooking vessel 52 is misused by a user, there is a risk that the cooking vessel 52 will be overheated if heating control is performed based on the thermistor 60 disposed in the exhaust pipe 54.
[0052] In grill device 5, in order to prevent overheating of cooking container 52 in the event of misuse by the user as described above, when first thermostat 61 detects a temperature equal to or higher than the first threshold, it cuts off the electrical connection between heating section 53 and power supply unit 7 and stops heating by heating section 53. After heating by heating section 53 is stopped, the temperature inside heating chamber 51 drops, and when first thermostat 61 detects that the temperature has dropped below the return temperature, it restores the electrical connection between heating section 53 and power supply unit 7. This allows heating by heating section 53 to resume.
[0053] The second thermostat 62 is a thermostat different from the first thermostat 61. The second thermostat 62 is electrically connected to the heating unit 53, and cuts off the electrical connection with the heating unit 53 at a temperature equal to or higher than the second threshold. Specifically, the second thermostat 62 is electrically connected to the heating unit 53 and the power supply unit 7, and cuts off the electrical connection between the heating unit 53 and the power supply unit 7 at a temperature equal to or higher than the second threshold. For example, the second threshold in the second thermostat 62 is larger than the first threshold in the first thermostat 61. For example, the second threshold is arbitrarily set in the range of 160°C or higher and 200°C or lower. Preferably, the second threshold is arbitrarily set in the range of 170°C or higher and 180°C or lower.
[0054] Furthermore, after the second thermostat 62 cuts off the electrical connection between the heating section 53 and the power supply unit 7, it does not restore the electrical connection at a temperature equal to or higher than room temperature. For example, after the second thermostat 62 cuts off the electrical connection, it restores the electrical connection at a temperature equal to or lower than -30°C. Alternatively, the second thermostat 62 does not have to restore the electrical connection after the electrical connection is cut off.
[0055] In this way, the second thermostat 62 cuts off the electrical connection between the heating unit 53 and the power supply unit 7 when the temperature reaches or exceeds the second threshold value that is greater than the first threshold value, and stops heating by the heating unit 53. When the control unit detects that heating by the heating unit 53 has stopped, the control unit may control the display device of the operation unit 4 to display a display notifying an error. After cutting off the electrical connection, the second thermostat 62 does not restore the electrical connection between the heating unit 53 and the power supply unit 7 at temperatures equal to or greater than room temperature. As a result, heating by the heating unit 53 is stopped when the temperature inside the heating chamber 51 reaches or exceeds the second threshold value, and does not restore at room temperature.
[0056] For example, the second thermostat 62 can stop the heating of the heating unit 53 when the temperature inside the heating chamber 51 rises due to an abnormality such as a fire. When a fire breaks out inside the heating chamber 51, the temperature inside the heating chamber 51 rises. When the temperature reaches or exceeds a second threshold value, the second thermostat 62 cuts off the electrical connection between the heating unit 53 and the power supply unit 7, and stops the heating by the heating unit 53. Even if the temperature inside the heating chamber 51 drops after the heating by the heating unit 53 is stopped, the second thermostat 62 does not restore the electrical connection between the heating unit 53 and the power supply unit 7 at or above room temperature.
[0057] The first thermostat 61 and the second thermostat 62 may be, for example, a bimetal thermostat.
[0058] Next, the arrangement of the first thermostat 61 and the second thermostat 62 will be described.
[0059] 5 to 9, the first thermostat 61 and the second thermostat 62 are disposed outside the heating chamber 51. For example, the first thermostat 61 and the second thermostat 62 are disposed on the back surface 51b of the heating chamber 51. Specifically, the first thermostat 61 and the second thermostat 62 are disposed in the outer housing 56 on the back surface 51b side of the heating chamber 51.
[0060] The first thermostat 61 detects a temperature corresponding to the cooking container 52 placed in the heating chamber 51. Specifically, the first thermostat 61 is placed in the center of the back surface 51b of the heating chamber 51 in the left-right direction (X direction) of the heating chamber 51 when viewed from the back surface 51b side of the heating chamber 51. The temperature of the center portion in the left-right direction (X direction) of the heating chamber 51 tends to be higher than the temperature of the end portions in the left-right direction of the heating chamber 51. By being placed in the center of the back surface 51b of the heating chamber 51 in the left-right direction (X direction) of the heating chamber 51, the first thermostat 61 can detect the temperature of the portion of the heating chamber 51 where the temperature tends to be higher.
[0061] The first thermostat 61 is disposed closer to the exhaust pipe 54 than the second thermostat 62. For example, the first thermostat 61 is disposed below the exhaust pipe 54 when viewed from the rear surface 51b side of the heating chamber 51. The exhaust pipe 54 is a part that tends to become relatively hot because high-temperature air and the like is exhausted from it. By disposing the first thermostat 61 close to the exhaust pipe 54, it is possible to detect the temperature of the part that tends to become relatively hot.
[0062] 7 to 9, first thermostat 61 is disposed at a position facing container side wall 52b of cooking container 52 disposed in heating chamber 51. This allows first thermostat 61 to detect the temperature at a position where heat from cooking container 52 can be easily transferred.
[0063] The first thermostat 61 is disposed at a position higher than the lower heater 53a of the heating section 53. This makes it possible to prevent the first thermostat 61 from detecting the heat of the lower heater 53a.
[0064] In this way, since the first thermostat 61 is a type of thermostat that can be reset at room temperature, it is disposed in a position where the temperature is likely to become relatively high in the heating chamber 51. This allows the first thermostat 61 to temporarily stop heating when the temperature rises due to misuse by the user, etc., and to resume heating after the temperature returns to a normal state.
[0065] The second thermostat 62 detects a temperature corresponding to a portion of the heating chamber 51 that is farther away from the cooking vessel 52 than the first thermostat 61. The temperature of the portion detected by the second thermostat 62 is relatively unlikely to become higher than the temperature of the portion detected by the first thermostat 61. Specifically, when viewed from the rear surface 51b side of the heating chamber 51, the second thermostat 62 is disposed further outboard than the first thermostat 61 in the left-right direction (X direction) of the heating chamber 51. For example, the second thermostat 62 is disposed to the left of the center when viewed from the rear surface 51b side of the heating chamber 51.
[0066] In the left-right direction (X direction) of the heating chamber 51, the temperature of the portions outside the center of the heating chamber 51 is less likely to become higher than the temperature of the center of the heating chamber 51. The second thermostat 62 is disposed outside the first thermostat 61 in the left-right direction (X direction) of the heating chamber 51, and thereby detects the temperature of the portion of the heating chamber 51 where the temperature is less likely to become high.
[0067] Similar to the first thermostat 61, the second thermostat 62 is disposed at a position higher than the lower heater 53a of the heating unit 53. This makes it possible to prevent the second thermostat 62 from detecting the heat of the lower heater 53a.
[0068] Furthermore, the second thermostat 62 may be disposed at a higher position than the first thermostat 61. If a fire occurs inside the heating chamber 51, the temperature in the upper part of the heating chamber 51 tends to rise. For this reason, by disposing the second thermostat 62 at a higher position than the first thermostat 61, the second thermostat 62 can more easily detect an abnormality such as a fire.
[0069] In this way, the second thermostat 62 is a type of thermostat that does not return to normal at room temperature, and is therefore arranged in a position in the heating chamber 51 where the temperature is relatively unlikely to rise. This allows the second thermostat 62 to stop heating when the temperature rises due to an abnormality such as fire in the heating chamber 51, and to prevent the heating from being resumed. If the second thermostat 62 is arranged in a portion of the heating chamber 51 that is relatively likely to become hot, the electrical connection of the second thermostat 62 is likely to be cut off. If the electrical connection of the second thermostat 62 is likely to be cut off, the second thermostat 62 will not return to normal temperature or higher, making it difficult to use. If the electrical connection is cut off, the user will not be able to continue using the product, and the thermostat will need to be replaced as part of a service response, so it is desirable to avoid the electrical connection being cut off except when it is necessary to reliably cut off the electrical connection in an unsafe situation such as fire. For this reason, the second thermostat 62 can be reliably detected as an abnormal temperature rise such as fire by being arranged in a position in the heating chamber 51 where the temperature is relatively unlikely to rise.
[0070] As shown in Figures 5 to 9, a first recess 56a and a second recess 56b in which a first thermostat 61 and a second thermostat 62 are disposed are provided on the back surface 51b of the heating chamber 51. The first recess 56a and the second recess 56b are provided in the outer housing 56 on the back surface 51b of the heating chamber 51. The first recess 56a and the second recess 56b are recessed toward the inner housing 55. The first thermostat 61 is disposed on the concave surface of the first recess 56a, and the second thermostat 62 is disposed on the concave surface of the second recess 56b.
[0071] The first recess 56a is provided in the center of the rear surface 51b of the heating chamber 51 in the left-right direction (X direction) of the heating chamber 51 when viewed from the rear surface 51b side of the heating chamber 51. The first recess 56a has a substantially rectangular shape when viewed from the rear surface 51b side of the heating chamber 51.
[0072] The second recess 56b is provided outside the first recess 56a in the left-right direction (X direction) of the heating chamber 51 when viewed from the rear surface 51b side of the heating chamber 51. The second recess 56b has a substantially rectangular shape when viewed from the rear surface 51b side of the heating chamber 51.
[0073] 9, the depth D1 of the first recess 56a is greater than the depth D2 of the second recess 56b. The depth D1 of the first recess 56a is the distance from the rear surface 51b of the heating chamber 51 to the concave surface of the first recess 56a. The depth D2 of the second recess 56b is the distance from the rear surface 51b of the heating chamber 51 to the concave surface of the second recess 56b. As a result, the first thermostat 61 is disposed closer to the cooking vessel 52 than the second thermostat 62.
[0074] In this embodiment, the first thermostat 61 and the second thermostat 62 detect heat transmitted from the cooking container 52 disposed in the heating chamber 51 to the inner casing 55 of the heating chamber 51. Because the depth D1 of the first recess 56a is greater than the depth D2 of the second recess 56b, the first thermostat 61 is disposed closer to the inner casing 55 to which heat is transmitted from the cooking container 52 than the second thermostat 62. For this reason, the first thermostat 61 can detect the temperature of the heating chamber 51 more sensitively than the second thermostat 62.
[0075] On the other hand, if the first thermostat 61 is brought into contact with the inner housing 55, the sensitivity of the first thermostat 61 may become too sensitive. Also, it is necessary to use an expensive thermostat with high heat resistance, and in some cases, the heat resistance may not be sufficient. For this reason, a predetermined gap SP1 is provided between the first thermostat 61 and the inner housing 55 so that the first thermostat 61 does not come into contact with the inner housing 55.
[0076] For example, the outer housing 56 has a plurality of protrusions 57 that protrude from the portion where the first recess 56a is provided toward the inner housing 55 and come into contact with the inner housing 55. The plurality of protrusions 57 extend from the inner surface of the outer housing 56 toward the outer surface of the inner housing 55 and come into contact with the outer surface of the inner housing 55. This provides a predetermined gap SP1 between the portion where the first recess 56a is provided and the inner housing 55. By providing the predetermined gap SP1, the sensitivity of the first thermostat 61 is not too sensitive, and the thermostat can be made heat resistant.
[0077] [effect] The grill device 5 according to the first embodiment provides the following advantages.
[0078] Grill apparatus 5 according to embodiment 1 of the present disclosure includes heating chamber 51, cooking container 52, heating unit 53, and multiple thermostats 61, 62. Cooking container 52 is disposed inside heating chamber 51. Heating unit 53 heats cooking container 52. Multiple thermostats 61, 62 are disposed outside heating chamber 51 and electrically connected to heating unit 53. Multiple thermostats 61, 62 include a first thermostat 61 that cuts off electrical connection with heating unit 53 at a temperature equal to or higher than a first threshold, and a second thermostat 62 that is different from first thermostat 61 and cuts off electrical connection with heating unit 53 at a temperature equal to or higher than a second threshold.
[0079] With this configuration, it is possible to improve safety while suppressing increases in manufacturing costs. In grill device 5, when the temperature of heating chamber 51 reaches or exceeds the first or second threshold, multiple thermostats 61, 62 can cut off electrical connection with heating unit 53 and stop heating by heating unit 53. Therefore, in grill device 5, when a user misuse occurs or an abnormality such as a fire occurs, heating unit 53 can stop heating without using a control unit. Also, there is no need to use lead wires to connect the control unit. This allows the number of parts of grill device 5 to be reduced, and manufacturing costs to be reduced.
[0080] Furthermore, since the multiple thermostats 61, 62 are disposed outside the heating chamber 51, it is not necessary to use expensive thermostats with high heat resistance, and relatively inexpensive thermostats can be used.
[0081] Furthermore, by using different thermostats for the multiple thermostats 61, 62, it is possible to stop heating by the heating unit 53 depending on the state of the heating chamber 51. For example, the first thermostat 61 detects a state in which the temperature of the heating chamber 51 is rising due to misuse by the user, and the second thermostat 62 detects a state in which the temperature of the heating chamber 51 is rising due to an abnormality such as a fire, and stops heating by the heating unit 53. This improves safety.
[0082] After the electrical connection with the heating unit 53 is cut off, the first thermostat 61 restores the electrical connection when the temperature falls below a return temperature, which is equal to or higher than room temperature and lower than a first threshold value. After the electrical connection with the heating unit 53 is cut off, the second thermostat 62 does not restore the electrical connection when the temperature is equal to or higher than room temperature. With this configuration, the first thermostat 61 can temporarily stop heating by the heating unit 53 and resume heating. Meanwhile, the second thermostat 62 can stop heating by the heating unit 53 and maintain the stopped heating state.
[0083] For example, when the temperature of heating chamber 51 is rising due to misuse by the user, first thermostat 61 temporarily cuts off electrical connection with heating unit 53, temporarily stopping heating. When the user's misuse is corrected and normal use resumes, the temperature of heating chamber 51 drops below the normal temperature, which is the return temperature. At this time, first thermostat 61 restores electrical connection with heating unit 53, and heating can be resumed. In this way, by using a returnable thermostat as first thermostat 61, the usability of grill device 5 can be improved with an inexpensive configuration.
[0084] On the other hand, in a state where the temperature of heating chamber 51 is rising due to an abnormality such as a fire, second thermostat 62 cuts off the electrical connection with heating unit 53 and stops heating. After cutting off the electrical connection, second thermostat 62 does not restore the electrical connection with heating unit 53 at room temperature or higher. This makes it possible to maintain the state in which heating by heating unit 53 is stopped so as not to spread damage when an abnormality occurs, thereby improving safety.
[0085] First thermostat 61 is disposed on rear surface 51b of heating chamber 51. With this configuration, first thermostat 61 can easily detect the temperature of heating chamber 51. This makes it possible to further improve safety while suppressing increases in manufacturing costs.
[0086] Cooking container 52 includes container bottom 52a and container sidewall 52b extending upward from the outer edge of container bottom 52a. First thermostat 61 is disposed in a position facing container sidewall 52b. With this configuration, first thermostat 61 is disposed closer to container sidewall 52b of cooking container 52. This makes it easier for first thermostat 61 to detect heat transferred from cooking container 52. This makes it possible to further improve safety while suppressing increases in manufacturing costs.
[0087] When viewed from the rear surface 51b side of the heating chamber 51, the first thermostat 61 is disposed in the center of the rear surface 51b of the heating chamber 51 in the left-right direction (X direction) of the heating chamber 51. With this configuration, the first thermostat 61 can be disposed in the center of the left-right direction (X direction) of the heating chamber 51, which is prone to becoming relatively hot. This makes it possible to further improve safety while suppressing increases in manufacturing costs.
[0088] The second thermostat 62 is disposed on the rear surface 51b of the heating chamber 51. When viewed from the rear surface 51b side of the heating chamber 51, the second thermostat 62 is disposed outside the first thermostat 61 in the left-right direction (X direction) of the heating chamber 51. With this configuration, the second thermostat 62 is disposed at a position where the temperature of the heating chamber 51 is less likely to become relatively high than the first thermostat 61.
[0089] For example, if a fire occurs in the heating chamber 51, the temperature of the entire heating chamber 51 is likely to rise. On the other hand, the temperature rise of the heating chamber 51 due to misuse by the user is likely to be larger in the center part than at the ends in the left-right direction (X direction) of the heating chamber 51. For this reason, by arranging the second thermostat 62 on the outside of the first thermostat 61, the second thermostat 62 can more reliably detect the occurrence of an abnormality such as a fire, stop heating, and maintain the stopped state of heating. In addition, the first thermostat 61 can detect a temperature rise due to misuse by the user, temporarily stop heating, and resume heating. As a result, it is possible to further improve safety and improve usability for the user while suppressing an increase in manufacturing costs.
[0090] The grill device 5 is provided with an exhaust pipe 54 that is provided on the rear surface 51b of the heating chamber 51 and exhausts the air inside the heating chamber 51. The first thermostat 61 is disposed closer to the exhaust pipe 54 than the second thermostat 62. With this configuration, the first thermostat 61 is disposed closer to the exhaust pipe 54, which is prone to become relatively hot, making it easier to detect the temperature of the heating chamber 51. This makes it possible to further improve safety while suppressing increases in manufacturing costs.
[0091] Heating unit 53 is disposed below cooking container 52. Multiple thermostats 61, 62 are disposed at a position higher than heating unit 53. With this configuration, multiple thermostats 61, 62 can be reduced in influence of heat from heating unit 53.
[0092] The first threshold value of the first thermostat 61 is smaller than the second threshold value of the second thermostat 62. With this configuration, it is possible to further improve safety while suppressing increases in manufacturing costs. Also, it is possible to more reliably switch between cutting off electrical connection by the first thermostat 61 and the second thermostat 62 depending on the state inside the heating chamber 51.
[0093] Heating chamber 51 includes an inner housing 55 that houses cooking container 52, and an outer housing 56 that is disposed outside inner housing 55. Multiple thermostats 61, 62 are disposed outside outer housing 56. With this configuration, multiple thermostats 61, 62 do not need to directly detect heat from cooking container 52, and therefore inexpensive thermostats can be used.
[0094] The outer housing 56 is provided with a first recess 56a recessed toward the inner housing 55. The first thermostat 61 is disposed in the first recess 56a. With this configuration, the first thermostat 61 can be disposed closer to the inner housing 55. This makes it easier for the first thermostat 61 to detect the temperature of the heating chamber 51.
[0095] The outer housing 56 has a protrusion 57 that protrudes from the portion where the first recess 56a is provided toward the inner housing 55 and comes into contact with the inner housing 55. With this configuration, a predetermined gap SP1 can be provided between the first thermostat 61 and the inner housing 55. By providing this gap SP1, it is possible to prevent the first thermostat 61 from coming too close to the inner housing 55, thereby preventing the temperature of the heating chamber 51 from being detected too sensitively.
[0096] The outer housing 56 is provided with a second recess 56b recessed toward the inner housing 55. The second thermostat 62 is disposed in the second recess 56b. The depth D1 of the first recess 56a is greater than the depth D2 of the second recess 56b. With this configuration, the first thermostat 61 can be disposed closer to the inner housing 55 than the second thermostat 62. This allows the first thermostat 61 to detect the temperature of the heating chamber 51 more sensitively than the second thermostat 62.
[0097] The second thermostat 62 is disposed at a higher position than the first thermostat 61. For example, if a fire occurs inside the heating chamber 51, the temperature tends to become high above the heating chamber 51. For this reason, by disposing the second thermostat 62 above the first thermostat 61, a temperature rise caused by an abnormality such as a fire can be easily detected by the second thermostat 62.
[0098] The heating section 53 is electrically connected to the power supply unit 7 via a plurality of thermostats 61, 62. With such a configuration, it is possible to further improve safety while suppressing an increase in manufacturing costs.
[0099] Grill device 5 includes a thermistor 60 disposed in exhaust pipe 54, and a control unit that controls heating unit 53 based on temperature information detected by thermistor 60. With this configuration, for example, when the thermistor 60 detects a temperature lower than the temperature inside heating chamber 51 due to misuse by a user, and cooking container 52 is overheated, heating by heating unit 53 can be stopped.
[0100] The induction heating cooker 1 equipped with the grill device 5 can also achieve the same effects as those of the grill device 5 described above.
[0101] In this embodiment, the first thermostat 61 is disposed in the center of the back surface 51b of the heating chamber 51 in the left-right direction (in the X direction) of the heating chamber 51, but is not limited thereto. The first thermostat 61 may be disposed in a position outside the heating chamber 51 where it is easy to detect a temperature rise caused by misuse by the user or the like.
[0102] In the present embodiment, an example in which the multiple thermostats 61, 62 include two thermostats has been described, but the present invention is not limited to this. The multiple thermostats 61, 62 may include two or more thermostats.
[0103] For example, when using a plurality of thermostats that can restore electrical connection with the heating unit 53 at room temperature or higher, the type of misuse by the user can be detected by devising the positions of the plurality of thermostats. For example, when heating is performed with the opening and closing door 51a at the front of the heating chamber 51 open, relatively hot air may come out from the front side of the heating chamber 51. In this case, by arranging a resettable thermostat near the front of the heating chamber 51, it is possible to detect the state in which the opening and closing door 51a at the front of the heating chamber 51 is not closed. Alternatively, when the exhaust port of the exhaust pipe 54 is blocked by a pan or the like, the temperature near the exhaust pipe 54 is likely to rise. In this case, by arranging a resettable thermostat in the exhaust pipe 54, it is possible to detect the state in which the exhaust port of the exhaust pipe 54 is blocked.
[0104] In the present embodiment, an example in which the thermistor 60 is disposed in the exhaust tube 54 has been described, but the present invention is not limited to this. For example, it is sufficient that a temperature sensor capable of detecting temperature information is disposed in the exhaust tube 54. The control unit may control the heating unit 53 based on the temperature information detected by the temperature sensor.
[0105] (Other embodiments) As described above, the above embodiment has been described as an example of the technology disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can be applied to embodiments in which modifications, substitutions, additions, omissions, etc. are made as appropriate.
[0106] Although the present disclosure has been fully described in connection with the preferred embodiments with reference to the accompanying drawings, various changes and modifications will be apparent to those skilled in the art, and such changes and modifications should be understood to be included within the scope of the present invention as defined by the appended claims, unless they depart therefrom.
[0107] (Overview of the embodiment) (1) The grill apparatus of the present disclosure comprises a heating chamber, a cooking container disposed inside the heating chamber, a heating unit for heating the cooking container, and a plurality of thermostats disposed outside the heating chamber and electrically connected to the heating unit, the plurality of thermostats including a first thermostat that cuts off electrical connection with the heating unit at a temperature equal to or greater than a first threshold, and a second thermostat different from the first thermostat that cuts off electrical connection with the heating unit at a temperature equal to or greater than a second threshold.
[0108] (2) In the grill device of (1), the first thermostat may restore the electrical connection after the electrical connection is interrupted when the temperature falls below a restoration temperature that is equal to or higher than room temperature and lower than the first threshold value, and the second thermostat may not restore the electrical connection when the temperature is equal to or higher than room temperature after the electrical connection is interrupted.
[0109] (3) In the grill device of (1) or (2), the first thermostat may be disposed on a rear surface of the heating chamber.
[0110] (4) In any one of the grill devices (1) to (3), the cooking container may include a container bottom and a container side wall extending upward from an outer edge of the container bottom, and the first thermostat may be positioned opposite the container side wall.
[0111] (5) In the grill device of any one of (1) to (4), the first thermostat may be disposed in the center of the rear surface of the heating chamber in the left-right direction of the heating chamber when viewed from the rear surface side of the heating chamber.
[0112] (6) In the grill device of (5), the second thermostat may be arranged on the rear side of the heating chamber, and the second thermostat may be arranged outboard of the first thermostat in the left-right direction of the heating chamber when viewed from the rear side of the heating chamber.
[0113] (7) Any one of the grill devices (1) to (6) may further include an exhaust pipe provided at the rear of the heating chamber to exhaust air from within the heating chamber, and the first thermostat may be positioned closer to the exhaust pipe than the second thermostat.
[0114] (8) In the grill device of any one of (1) to (7), the heating unit may be disposed below the cooking container, and the thermostats may be disposed at a higher position than the heating unit.
[0115] (9) In the grill device of any one of (1) to (8), the first threshold value may be smaller than the second threshold value.
[0116] (10) In any one of the grill devices (1) to (9), the heating chamber may include an inner housing that houses the cooking container and an outer housing that is arranged outside the inner housing, and the multiple thermostats may be arranged outside the outer housing.
[0117] (11) In the grill apparatus of (10), the outer housing may be provided with a recess recessed toward the inner housing, and the first thermostat may be disposed in the recess.
[0118] (12) In the grill device of (11), the outer housing may have a protrusion that protrudes from a portion where the recess is provided toward the inner housing and comes into contact with the inner housing.
[0119] (13) In the grill device of (10), the outer casing may be provided with a first recess and a second recess recessed toward the inner casing, the first thermostat may be disposed in the first recess and the second thermostat may be disposed in the second recess, and the depth of the first recess may be greater than the depth of the second recess.
[0120] (14) In the grill device of any one of (1) to (8), the second thermostat may be disposed at a higher position than the first thermostat.
[0121] (15) In the grill device of any one of (1) to (14), the heating section may be electrically connected to a power supply unit via the plurality of thermostats.
[0122] (16) In any one of the grill devices (1) to (6), an exhaust pipe is provided at the rear of the heating chamber and exhausts air from within the heating chamber, a temperature sensor is disposed in the exhaust pipe, and a control unit controls the heating unit based on temperature information detected by the temperature sensor. Further, it may be provided.
[0123] (17) The induction heating cooker of the present disclosure includes any one of the grill devices (1) to (16). [Industrial Applicability]
[0124] The present disclosure can be applied to a grill device, and also to an induction heating cooker that inductively heats a heating object such as a pan. [Explanation of symbols]
[0125] 1 induction cooker 2 Top plate 3. Chassis 4 Control section 5 Grilling equipment 6 Heating coil 7 Power supply unit 31 1st cabinet 32 2nd cabinet 33 3rd cabinet 51 Heating chamber 51a Opening and closing door 51b Back 52 Cooking vessels 52a Bottom of container 52b Container side wall 53 Heating section 53a Lower heater 53b Upper heater 54 Exhaust stack 55 Inner housing 56 Outer housing 56a First recess 56b Second recess 57 Protrusion 60 Thermistor 61 First Thermostat 62 Second Thermostat
Claims
1. A heating chamber; A cooking vessel disposed within the heating chamber; A heating unit that heats the cooking container; A plurality of thermostats are disposed outside the heating chamber and electrically connected to the heating unit; Equipped with The plurality of thermostats include a first thermostat that cuts off electrical connection with the heating unit at a temperature equal to or higher than a first threshold; a second thermostat that is different from the first thermostat and that cuts off electrical connection with the heating unit at a temperature equal to or higher than a second threshold; Including, Grill equipment.
2. the first thermostat restores the electrical connection when the temperature falls to or below a restoration temperature that is equal to or higher than room temperature and lower than the first threshold value after the electrical connection is interrupted; the second thermostat does not restore the electrical connection when the temperature is equal to or higher than room temperature after the electrical connection is interrupted; 10. The grilling apparatus of claim 1.
3. The first thermostat is disposed on the rear surface of the heating chamber.
3. The grilling apparatus of claim 2.
4. The cooking vessel includes a vessel bottom and a vessel sidewall extending upwardly from an outer edge of the vessel bottom; The first thermostat is disposed at a position facing the container side wall.
4. The grilling apparatus of claim 3.
5. The first thermostat is disposed at a center of the rear surface of the heating chamber in a left-right direction of the heating chamber when viewed from the rear surface side of the heating chamber.
4. The grilling apparatus of claim 3.
6. the second thermostat is disposed on the rear surface of the heating chamber; the second thermostat is disposed outside the first thermostat in a left-right direction of the heating chamber when viewed from the rear side of the heating chamber; 6. The grilling apparatus of claim 5.
7. Further, an exhaust pipe is provided on a rear surface of the heating chamber and exhausts air from within the heating chamber. The first thermostat is disposed closer to the exhaust stack than the second thermostat.
4. The grilling apparatus of claim 3.
8. The heating unit is disposed below the cooking vessel, The thermostats are disposed at a position higher than the heating unit.
10. The grilling apparatus of claim 1.
9. The first threshold is smaller than the second threshold.
10. The grilling apparatus of claim 1.
10. The heating chamber includes: an inner housing for housing the cooking vessel; an outer housing disposed outside the inner housing; Including, The plurality of thermostats are disposed outside the outer housing.
3. The grilling apparatus of claim 2.
11. The outer housing has a recess that is recessed toward the inner housing, The first thermostat is disposed in the recess.
11. The grilling apparatus of claim 10.
12. The outer housing has a protrusion that protrudes from a portion where the recess is provided toward the inner housing and comes into contact with the inner housing.
12. The grilling apparatus of claim 11.
13. The outer housing has a first recess and a second recess recessed toward the inner housing, the first thermostat is disposed in the first recess, the second thermostat is disposed in the second recess, The depth of the first recess is greater than the depth of the second recess.
11. The grilling apparatus of claim 10.
14. The second thermostat is disposed at a higher position than the first thermostat.
10. The grilling apparatus of claim 1.
15. The heating unit is electrically connected to a power supply unit via the thermostats.
10. The grilling apparatus of claim 1.
16. an exhaust pipe provided at a rear surface of the heating chamber and configured to exhaust air from within the heating chamber; A temperature sensor disposed in the exhaust stack; a control unit that controls the heating unit based on temperature information detected by the temperature sensor; Further preparations:
10. The grilling apparatus of claim 1.
17. Equipped with the grill device according to any one of claims 1 to 16, Induction heating cooker.
Citation Information
Patent Citations
Grill device and gas stove
JP2020180748A