Heating cooker

Abstract

The heating cooker includes a housing, a heating chamber, a door, at least one heating device, a control substrate, a mechanical chamber, and a fan. The heating chamber is configured in the inside of the housing and has a front surface opening. The door covers the front surface opening. The control substrate is connected with the at least one heating device. The mechanical chamber is configured in the inside of the housing and accommodates a control unit. The fan is accommodated in the mechanical chamber and sends out air toward the mechanical chamber. The door has an outer frame, two members covering an opening surrounded by the outer frame, and a suction port and an exhaust port provided to the outer frame. The suction port is provided to a lower portion of the door on a side where the mechanical chamber is provided.

Description

Technical Field

[0001] This disclosure relates to a heating cooker for heating food or other heated objects. Background Technology

[0002] At least a portion of the door covering the opening on the front surface of the heating chamber of the heating cooker is made of a transparent component such as glass. This allows the user to visually inspect the interior of the heating chamber (see, for example, Patent Document 1).

[0003] Patent Document 1 discloses a heating cooker having a door with an upper door frame and a lower door frame. The upper door frame and the lower door frame each have an outer baffle, an inner baffle, and a notch. The outer baffle and the inner baffle are opposite each other with an internal space between them. The notch supports the outer baffle and the inner baffle from above and below, allowing communication between the outside and the space inside the door.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2010-78308 Summary of the Invention

[0007] The heating cooker disclosed in Patent Document 1 aims to improve the performance of suppressing the formation of condensation, i.e., fog, in the space between the outer and inner baffles. Specifically, the heating cooker disclosed in Patent Document 1 has a waterproof dam disposed inside the cutout of the lower door frame and close to the space. This waterproof dam has a height greater than the thickness of the outer baffle.

[0008] This disclosure provides a technique for further suppressing the generation of mist in the space inside the door of a heated cooker.

[0009] The heating cooker disclosed herein includes a housing, a heating chamber, a door, at least one heating device, a control board, a mechanical chamber, and a fan.

[0010] The heating chamber is located inside the housing and has an opening on its front surface. A door covers the front surface opening. A control board is connected to at least one heating device. The machinery compartment is located inside the housing and houses the control unit. A fan is housed in the machinery compartment and blows air towards it.

[0011] The door has an outer frame, two parts covering an opening enclosed by the outer frame, and an air intake and an air exhaust port located on the outer frame. The air intake port is located at the bottom of the door on the side where the machine room is located.

[0012] The heating cooker disclosed herein can suppress the generation of fog in the space inside the door. Attached Figure Description

[0013] Figure 1This is a front perspective view of the heating cooker according to an embodiment of the present disclosure with the door closed.

[0014] Figure 2 This is a front perspective view of the heating cooker in the embodiment with the door and control panel removed.

[0015] Figure 3A This is a perspective view of the door of the heating cooker according to the embodiment.

[0016] Figure 3B This is an exploded 3D view of the door.

[0017] Figure 4 This is a rear view of one of the components that makes up the door.

[0018] Figure 5 This is a rear view of another component that makes up the door.

[0019] Figure 6 It is a three-dimensional view of the door as seen from a slightly lower angle after the outer glass panel has been removed.

[0020] Figure 7 yes Figure 6 A magnified view of the area near the exhaust port.

[0021] Figure 8 It is a diagram that schematically represents the flow of air in the space inside a door. Detailed Implementation

[0022] The embodiments will now be described in detail with reference to the accompanying drawings. However, sometimes necessary detailed descriptions are omitted. For example, detailed descriptions of known matters or repeated descriptions of substantially the same structures may be omitted.

[0023] The accompanying drawings and the following description are provided to enable those skilled in the art to fully understand this disclosure, and are not intended to limit the subject matter of the technical solutions described herein.

[0024] (Implementation Method)

[0025] [1-1. Structure]

[0026] Figure 1 and Figure 2 This shows the appearance of the heating cooker 1 according to an embodiment of the present disclosure. Figure 1 This is a perspective view of the front of the heating cooker 1 with the door 7 closed. Figure 2 This is a front perspective view of the heating cooker 1 with the door 7 and control panel 11 removed.

[0027] exist Figure 1 as well as Figure 2In the attached diagram, the area near the front corresponds to the front of the heating cooker 1. That is, the front is defined as the side of the door 7 and the front surface opening 3b of the heating cooker 1, and its opposite side ( Figure 1 and Figure 2 The inside side (in the middle) is defined as the rear. Figure 2 The left and right sides are defined as the left and right sides of the heating cooker 1, respectively.

[0028] like Figure 1 as well as Figure 2 As shown, the heating cooker 1 includes a housing 3, a heating chamber 5, a door 7, a machine chamber 13, and an operation panel 11. The heating chamber 5 is disposed within the housing 3. The door 7 covers a front surface opening 3b surrounded by a front frame 3a, which is the front surface of the housing 3. The machine chamber 13 is disposed within the housing 3 adjacent to the right side of the heating chamber 5. The operation panel 11 is disposed on the front surface of the machine chamber 13.

[0029] A microwave oscillator configured to generate microwaves is disposed in the machine room 13. In this embodiment, the microwave oscillator is, for example, a magnetron 21.

[0030] The heating chamber 5 has a microwave emission port (not shown) for radiating microwaves generated by the magnetron 21 into the heating chamber 5. The food object placed in the heating chamber 5 is heated using microwaves emitted from the microwave emission port.

[0031] A convection heater section (not shown) is disposed within the housing 3 and behind the rear wall of the heating chamber 5. The convection heater section includes a convection heater and a circulating fan.

[0032] For heating via the convection heater section, an intake port and an exhaust port (neither shown) are formed on the rear wall of the heating chamber 5. Air from the heating chamber 5 is drawn in through the intake port by a rotating circulating fan. This air is heated by the convection heater and then returns to the heating chamber 5 through the exhaust port. Thus, the object being heated is heated uniformly. An intake port (not shown) for drawing external air into the housing 3 is provided at the lower front part of the housing 3.

[0033] The magnetron 21 and the convection heater section are the heating devices for the heating cooker 1.

[0034] Door 7 has a horizontal rotation axis disposed below the front surface of housing 3, and is mounted such that it covers the opening 3b on the front surface of housing 3. Door 7 has a mounting part 7aa (see reference). Figure 6 and Figure 7 A handle 7a is installed on the upper front part of the door 7. When the handle 7a is pulled, causing the door 7 to rotate relative to the axis of rotation, the front surface opening 3b is opened. When the door 7 is lifted by holding the handle 7a and rotated to a vertical position, the front surface opening 3b is closed.

[0035] The control panel 11 has a display section and an operation section. The display section is, for example, an LCD screen used to display menus and other information. The operation section includes, for example, buttons and dials, to receive instructions from the user regarding the heating cooker 1.

[0036] The machine room 13 is equipped with a fan 20, a magnetron 21, a convection heater section, and a control board (not shown). The fan 20 delivers cooling air to the magnetron 21, the convection heater section, and the control board. The control board includes a control unit and inverter circuitry.

[0037] The control unit includes a microprocessor and a semiconductor memory. The control unit is connected to the operation panel 11, fan 20, convection heater unit, inverter circuit, etc. The control unit receives instructions input via the operation section of the operation panel 11 and controls the display section of the operation panel 11, fan 20, convection heater unit, inverter circuit, etc. The inverter circuit drives the magnetron 21.

[0038] The heating cooker 1 has a door arm mounting hole 17, a door arm 19, a hinge mounting hole 22, and a hinge 24.

[0039] The door arm 19 includes a first door arm 19a and a second door arm 19b, which are connected to the door 7 and limit the opening degree of the door 7. The hinge 24 includes a first hinge 24a and a second hinge 24b having a common horizontal axis of rotation, which rotatably connect the door 7 to the housing 3.

[0040] The door arm mounting hole 17 includes a first door arm mounting hole 17a and a second door arm mounting hole 17b. The hinge mounting hole 22 includes a first hinge mounting hole 22a and a second hinge mounting hole 22b. In this embodiment, the door arm mounting hole 17 and the hinge mounting hole 22 are equivalent to the mounting holes on the housing side.

[0041] The first hinge mounting hole 22a is located on the lower right side of the front frame 3a, below the opening 3b on the front surface. A first hinge 24a is mounted in the first hinge mounting hole 22a. The first door arm mounting hole 17a is located on the lower right side of the front frame 3a, above the first hinge mounting hole 22a.

[0042] The front end of the first door arm 19a is mounted on the back of the right end of the door 7 and is rotatable relative to a horizontal rotation axis. The first door arm 19a is supported by a guide roller (not shown) located inside the housing 3 behind the first door arm mounting hole 17a. The rear end of the first door arm 19a is connected to the interior of the housing 3 behind the guide roller via a spring (not shown).

[0043] The second hinge mounting hole 22b is located on the lower left side of the front frame 3a, below the opening 3b on the front surface. A second hinge 24b is mounted in the second hinge mounting hole 22b. The second door arm mounting hole 17b is located on the lower left side of the front frame 3a, above the second hinge mounting hole 22b.

[0044] The front end of the second door arm 19b is mounted on the back of the left end of the door 7 and is rotatable relative to a horizontal rotation axis. The second door arm 19b is supported by a guide roller (not shown) located inside the housing 3 behind the second door arm mounting hole 17b. The rear end of the second door arm 19b is connected to the interior of the housing 3 behind the guide roller via a spring (not shown).

[0045] Figure 3A and Figure 3B This shows the structure of the door 7 of the heating cooker 1 in this embodiment. Figure 3A It is a 3D diagram of door 7. Figure 3B This is a exploded 3D diagram of Gate 7.

[0046] like Figure 3A as well as Figure 3B As shown, door 7 includes handle 7a, component 7b, component 7c, component 7d, component 7e, outer glass panel 8a, and inner glass panel 8b. Components 7b, 7c, 7d, and 7e constitute the outer frame of door 7. The outer glass panel 8a and inner glass panel 8b are made of transparent glass and cover the opening in the center of door 7 formed by the outer frame of door 7.

[0047] The outer glass panel 8a is mounted on the mounting portion 8c of component 7b. The inner glass panel 8b is mounted on the rear side of component 7d. The space 28 inside the door 7 (refer to...) Figure 8 It is divided by the outer glass panel 8a, the inner glass panel 8b, and the outer frame of the door 7.

[0048] The electromagnetic wave leakage prevention plate 7f is a metal plate disposed within the space 28. The electromagnetic wave leakage prevention plate 7f prevents electromagnetic waves from leaking to the outside of the heating chamber 5 through the door 7. The electromagnetic wave leakage prevention plate 7f has multiple perforations (not shown) located in the center of the electromagnetic wave leakage prevention plate 7f opposite to the opening 3b on the front surface.

[0049] Users can visually inspect the interior of the heating chamber 5 from the front of the heating cooker 1 through the perforations, the outer glass plate 8a, and the inner glass plate 8b.

[0050] Figure 4 This is a rear view of component 7e that constitutes door 7. (As shown) Figure 4 As shown, component 7e has a door arm mounting hole 18 and a hinge mounting hole 23 located on its back side.

[0051] The door arm mounting hole 18 has a first door arm mounting hole 18a and a second door arm mounting hole 18b. The hinge mounting hole 23 has a first hinge mounting hole 23a and a second hinge mounting hole 23b. In this embodiment, the door arm mounting hole 18 and the hinge mounting hole 23 are equivalent to door side mounting holes.

[0052] The first hinge mounting hole 23a and the second hinge mounting hole 23b are located on the lower back of component 7e. Figure 4 The left and right ends of the middle ( Figure 1 and Figure 2 (The right and left ends are shown in the diagram). The first door arm mounting hole 18a and the second door arm mounting hole 18b are respectively located above the first hinge mounting hole 23a and the second hinge mounting hole 23b. Figure 4 The first door arm 19a and the first hinge 24a are not shown in the figure.

[0053] If door 7 covers the front surface opening 3b, then the first door arm mounting hole 17a and the second door arm mounting hole 17b are respectively opposite to the first door arm mounting hole 18a and the second door arm mounting hole 18b. The first hinge mounting hole 22a and the second hinge mounting hole 22b are respectively opposite to the first hinge mounting hole 23a and the second hinge mounting hole 23b.

[0054] The first door arm mounting hole 17a and the first hinge mounting hole 22a communicate with the machine room 13. Therefore, air delivered from the fan 20 flows out to the outside of the housing 3 through the first door arm mounting hole 17a and the first hinge mounting hole 22a. If the door 7 covers the front surface opening 3b, the air reaches the door 7.

[0055] Figure 5 This is a rear view of component 7b, which constitutes door 7. On the lower back of component 7b... Figure 5 The left end of the middle ( Figure 1 and Figure 2 An air intake 25 is provided at the right end of the door 7. Air flowing out of the housing 3 is supplied to the space 28 inside the door 7 through the air intake 25. As a result, water vapor present in the space 28 inside the door 7 can be discharged to the outside.

[0056] The air intake 25 is located near the first door arm mounting hole 18a and the first hinge mounting hole 23a, but not near the second door arm mounting hole 18b and the second hinge mounting hole 23b.

[0057] Figure 6 This is a perspective view of door 7 viewed from a slightly downward angle with the outer glass panel 8a removed. Figure 7 yes Figure 6 A magnified view of the area near the exhaust port.

[0058] like Figure 6 and Figure 7As shown, door 7 includes a vent 26 and an exhaust port 27. The vent 26 is located on part 7c, which divides the upper end of the space 28 inside door 7. The exhaust port 27 is located on part 7b, which is above the vent 26. The vent 26 and the exhaust port 27 are openings for discharging upward-facing air and water vapor in the space 28 to the outside of door 7.

[0059] Vent 26 includes a first vent 26a and a second vent 26b. Exhaust 27 includes a first exhaust 27a and a second exhaust 27b. The first vent 26a and the first exhaust 27a are located on the upper right side of the door 7. The second vent 26b and the second exhaust 27b are located on the upper left side of the door 7.

[0060] As described above, from fan 20 (refer to) Figure 2 The delivered air passes through the first door arm mounting hole 17a and the first hinge mounting hole 22a (see reference). Figure 2 The air is expelled to the outside of the housing 3 via the first door arm mounting hole 18a and the first hinge mounting hole 23a of the door 7 (see reference). Figure 4 ) and intake port 25 (refer to Figure 5 It is supplied to the space 28 inside the door 7.

[0061] Figure 8 This schematically illustrates the airflow within the space 28 inside door 7. (For example...) Figure 8 As shown, by supplying air to space 28, an upward airflow is generated throughout the entire area of ​​space 28.

[0062] The air intake 25 is located only on the lower right side of the door 7. Figure 5 (The middle is the left side). Therefore, as Figure 8 As indicated by the arrows, two main airflows are generated in space 28. One airflow is from the intake port 25 toward the first exhaust port 27a located above it. The other airflow is from the intake port 25 toward the second exhaust port 27b located diagonally above it.

[0063] When the temperature in space 28 is low, almost no airflow is generated in the lower left part of space 28. When the heating cooker 1 is working and the air in space 28 is heated, an airflow is generated from the lower left part of space 28 upwards. As a result, an airflow is generated from the air intake 25 towards the lower left part of space 28. As a result, water vapor present throughout the entire area of ​​space 28 can be efficiently discharged to the outside of door 7.

[0064] In this embodiment, supplying air to the interior of space 28 is more about efficiently removing water vapor from space 28 than about cooling the outer glass panel 8a of door 7. Therefore, the air intake 25 can be provided only in a portion of the lower part of space 28, or it can be omitted from the entire lower area of ​​space 28.

[0065] The outer perimeter of space 28 can be sealed except for the air intake 25 and the exhaust 27. Therefore, even if the user spills liquid near door 7 or boils water near the heating cooker 1, foreign matter such as liquid or steam can be prevented from entering space 28. If most of the outer perimeter of space 28 is sealed, condensation within space 28 can be suppressed.

[0066] In this embodiment, the air intake 25 is located at the lower part of the door 7, and the exhaust port 27 is located below the mounting portion 7aa of the handle 7a. This prevents foreign matter such as liquids and water vapor from entering through the air intake 25 or the exhaust port 27.

[0067] The air intake 25 and the exhaust 27 are not located over the entire upper or lower portion of the door 7, but only over a portion. This prevents foreign objects from entering through the air intake 25 or the exhaust 27.

[0068] [1-2. Actions]

[0069] The operation and function of the heating cooker 1 configured as described above will be explained below.

[0070] The user places the object to be heated in the heating chamber 5 and closes the door 7, then operates the control panel 11 to set heating conditions such as heating time and heating temperature. The control unit (not shown) of the heating cooker 1 controls the magnetron 21 and the like to heat the object under the set heating conditions.

[0071] During the operation of the magnetron 21, the fan 20 is driven to deliver air toward the magnetron 21 and the control board. The air from the fan 20 is supplied to the space 28 inside the door 7 through the hinge mounting hole 22 and door arm mounting hole 17 of the housing 3, the hinge mounting hole 23 and door arm mounting hole 18 of the door 7, and the air intake 25. The air supplied to the space 28, together with the water vapor present in the space 28, is discharged to the outside through the exhaust port 27 located at the top of the door 7.

[0072] This allows water vapor present in space 28 to be efficiently discharged to the outside. As a result, condensation in space 28 can be suppressed. Even if condensation temporarily occurs in space 28, the water vapor can be quickly discharged to the outside to remove the condensation.

[0073] According to this embodiment, water vapor in space 28 can be discharged more efficiently than if it were only discharged through natural convection via the air intake 25 and exhaust 27 provided in space 28. Therefore, condensation in space 28 can be suppressed more effectively.

[0074] Compared to the case where air is supplied to space 28 by a dedicated fan or the like located near space 28, a smooth airflow can be generated. Therefore, it is possible to prevent door 7 from being overcooled and affecting the heating in heating chamber 5.

[0075] In this embodiment, a fan 20, which is used to cool electronic components such as the magnetron 21 and the control board, is used as the fan for supplying air to the space 28. This allows condensation in the space 28 to be suppressed without the need for an additional dedicated fan. Consequently, the increase in manufacturing cost of the heating cooker 1 can be reduced.

[0076] In this embodiment, mounting holes on the housing side and the door side are used as the air duct for supplying air from the machine room 13 to the door 7. Therefore, air can be supplied to the space 28 without the need for an additional dedicated air duct. As a result, the increase in manufacturing cost of the heating cooker 1 can be suppressed.

[0077] [1-3. Effects, etc.]

[0078] As described above, in this embodiment, the heating cooker includes a housing, a heating chamber, a door, at least one heating device, a control board, a mechanical chamber, and a fan.

[0079] The heating chamber is located inside the housing and has an opening on its front surface. A door covers the front surface opening. A control board is connected to at least one heating device. The machinery compartment is located inside the housing and houses the control unit. A fan is housed in the machinery compartment and blows air towards it.

[0080] The door has an outer frame, two parts covering an opening enclosed by the outer frame, and an air intake and an air exhaust port located on the outer frame. The air intake port is located at the bottom of the door on the side where the machine room is located.

[0081] This allows water vapor present in the space inside the door to be efficiently exhausted to the outside. As a result, condensation in the space can be suppressed, and during heating, the cooking process inside the heating chamber can always be visually monitored through the glass panel located in the door.

[0082] In this embodiment, the exhaust port is located in the upper part of the door. This allows water vapor present inside the door to be efficiently exhausted to the outside along with the heated air. As a result, the formation of fog inside the door can be more effectively suppressed.

[0083] In this embodiment, the door has a handle mounted on the upper part of the door via a mounting portion. An exhaust vent is located below the handle mounting portion. This prevents foreign matter such as liquids and water vapor from entering the space inside the door through the exhaust vent.

[0084] In this embodiment, the heating cooker also has a door arm connecting the door to the housing. The door has a door-side mounting hole on which the front end of the door arm is mounted. The housing has a housing-side mounting hole on which the rear end of the door arm is mounted. The machine compartment communicates with the interior of the door, which is divided by the outer frame and the two components, via the housing-side mounting hole, the air intake, and the door-side mounting hole.

[0085] In this structure, there is no need to set up a dedicated air duct for supplying air from the fan to the space inside the door. As a result, it is possible to suppress the increase in manufacturing costs of the heating cooker.

[0086] (Modified Example)

[0087] The above embodiments are examples of the technology disclosed herein, and the technology disclosed herein is not limited to the above embodiments. The technology disclosed herein also includes variations that modify, substitute, add to, or omit the above embodiments.

[0088] The following are examples of variations of the above embodiments.

[0089] The heating cooker in the above embodiments includes a microwave and a convection heater as heating devices. However, the heating cooker disclosed herein is not limited to this structure.

[0090] The heating cooker disclosed herein may also include a radiant heater as a heating device, which is disposed at the top of the heating chamber 5 within the housing 3, radiating heat to the object being heated from above. The heating cooker disclosed herein may also include a steam generator as a heating device, which is disposed within the mechanical chamber 13, heating the object by supplying high-temperature steam to the heating chamber 5. The heating cooker disclosed herein may include at least one of the aforementioned heating devices.

[0091] In the heating cooker 1 of the above embodiment, the mechanical chamber 13 is located on the right side of the heating chamber 5. However, the mechanical chamber 13 may also be located on the left side of the heating chamber 5. In this case, the air intake 25 is located on the left side of the door 7.

[0092] Industrial utilization potential

[0093] The technology disclosed herein can be used in heating cookers for heating food and other heated objects.

[0094] Explanation of reference numerals in the attached figures

[0095] 1: Heating cooker; 3: Housing; 3a: Front frame; 3b: Front surface opening; 5: Heating chamber; 7: Door; 7a: Handle; 7aa: Mounting part; 7b: Component; 7c: Component; 7d: Component; 7e: Component; 7f: Radio wave leakage prevention plate; 8a: Outer glass panel; 8b: Inner glass panel; 8c: Mounting part; 11: Control panel; 13: Machinery room; 17: Door arm mounting hole (housing side mounting hole); 17a: First door arm mounting hole (housing side mounting hole); 17b: Second door arm mounting hole (housing side mounting hole); 18: Door arm mounting hole (door side mounting hole); 18a: First door arm mounting hole (door side mounting hole); 18b: Second door arm mounting hole (door side mounting hole); 19: Door arm; 19a: First door arm; 19b: Second door arm; 20: Fan; 21: Magnetron; 22: Hinge mounting hole (housing side mounting hole); 22a: First hinge mounting hole (housing side mounting hole); 22b: Second hinge mounting hole (housing side mounting hole); 23: Hinge mounting hole (door side mounting hole); 23a: First hinge mounting hole (door side mounting hole); 23b: Second hinge mounting hole (door side mounting hole); 24: Hinge; 24a: First hinge; 24b: Second hinge; 25: Air intake; 26: Vent; 26a: First vent; 26b: Second vent; 27: Exhaust port; 27a: First exhaust port; 27b: Second exhaust port; 28: Space.

Claims

1. A heating cooker, wherein, The heating cooker includes: a housing; a heating chamber disposed inside the housing and having a front surface opening; A door that covers the opening on the front surface; At least one heating device; a control board having a control unit connected to the at least one heating device; a machine chamber disposed inside the housing and housing the control unit; and a fan disposed in the machine chamber and configured to deliver air toward the machine chamber; the door having an outer frame, an outer glass panel and an inner glass panel covering an opening surrounded by the outer frame, and an air intake and an exhaust port disposed on the outer frame, the air intake being disposed on the lower part of the side of the door where the machine chamber is disposed; the heating cooker further having a door arm connecting the door to the housing; the door having a door-side mounting hole for mounting the front end of the door arm; the housing having a housing-side mounting hole for mounting the rear end of the door arm; the machine chamber communicating with the interior of the door defined by the outer frame, the outer glass panel, and the inner glass panel via the housing-side mounting hole, the air intake, and the door-side mounting hole.

2. The heating cooker according to claim 1, wherein, The exhaust port is located on a portion of the upper part of the door.

3. The heating cooker according to claim 2, wherein, The door has a handle mounted on the upper part of the door via a mounting portion, and the vent is located below the mounting portion of the handle.

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