WO2004111541A1

WO2004111541A1 - Electronic oven

Info

Publication number: WO2004111541A1
Application number: PCT/JP2004/008560
Authority: WO
Inventors: Masatomo Orita; Toshiyuki Tsujimoto; Yukio Abe
Original assignee: Matsushita Electric Industrial Co., Ltd.
Priority date: 2003-06-13
Filing date: 2004-06-11
Publication date: 2004-12-23
Also published as: EP1640667A1; EP1640667A4

Abstract

A built in-type electronic oven that has excellent operability, that is not voluminous, and where a liquid crystal display unit of a control portion is not steamed up. A built in-type electronic oven has a high frequency wave- generating portion for feeding a high frequency wave into a heating room, a control portion including a control circuit board for controlling the oven, and a blower portion for sending cooling air into the control portion. The oven heats and processes an object to be heated by feeding the high frequency wave into the heating room. The control portion is constructed in a form of a kangaroo pocket that extends in the length direction of the oven, and attached to the upper part of a front face of the oven. Air from the blower portion is led into the control portion from a back face of the control portion, and the air that cooled the control circuit board is discharged from a clearance for rotation that the control portion has.

Description

Specification

Technical field>

The present invention relates to a built-in type microwave oven used in combination with other heating cookers such as an induction heating cooker and a gas range, and more particularly to a built-in type microwave oven using a kangaroo pocket type control unit. <Background technology>

Conventionally, a built-in type microwave oven used in combination with another heating cooker such as an induction heating cooker or a gas range is known.

A built-in microwave oven using a kangar-one-pocket control unit, which is used in combination with an induction heating cooker or a gas range, is known (for example, see Patent Document 1).

(Patent Document 1) Japanese Patent Publication No. 8-3 0 5 7 9

FIG. 16 is a perspective view of an example of a conventional built-in type device.

In the figure, 60 is a built-in type conventional device, 61 is an electromagnetic cooker, 62 is a microwave oven, and 63 is a support stand. The electromagnetic cooker 61 is composed of a heating coil section 61a and a grill section 61b.

The microwave oven 62 includes an exhaust port 62a, an opening / closing door 62b, and a control unit 62c. Since the microwave oven 62 is provided directly below the electromagnetic cooker 61, the air cooled in the microwave oven cannot be directly discharged upward from the ceiling of the microwave oven like a single microwave oven. In addition, since other system kitchen equipment is provided on both sides, it cannot be exhausted from the side, and there is a wall near the rear, so if hot air is exhausted, hot air will be trapped and adversely affect the cooling effect. So it cannot exhaust backwards. As a result, the air that has cooled the microwave oven is exhausted upward through the housing of the electromagnetic cooker, or is exhausted from the front exhaust port 62a as shown in the figure. The control unit (control panel) 6 2c is provided on the side of the door. This is because when the open / close door of the microwave oven is opened, hot steam discharged from the heating chamber hits the liquid crystal display of the control unit and foggs the liquid crystal display, or when water vapor enters the control unit and the electronic components fail. This is to avoid cause.

Since the height of the support base 63 is fixed at a predetermined height along with other equipment in the system kitchen, it cannot be reduced so much, so the microwave oven is heated by the thickness of the exhaust port 62 a. The heating chamber is low, and the width of the heating chamber is reduced by the controller 62c. As described above, in the conventional built-in type apparatus, the internal volume of the heating chamber was narrowed in all directions.

In addition, the controller 62c was also located beside the door, so the operator had to squat down when operating, making it difficult to operate (the operability was not good).

FIG. 17 is a perspective view of an example of a conventional vinoleto-in type device described in Patent Document 1, wherein _c is a built-in type conventional device, 80 is a gas cooker, and 82 is an electronic range. , 83 is a support. The gas cooker 81 is composed of a gas range 81a and a grill portion 81b.

The microwave oven 82 has an exhaust port 82a, an opening / closing door 82b, and a kangaroo pocket-type control unit (control panel) 82c. Since the microwave oven 82 is provided directly below the gas cooker 81, the air that has cooled the microwave oven cannot be directly discharged upward from the ceiling of the microwave oven like a single microwave oven. In addition, since other system kitchen equipment is provided on both sides, exhaust cannot be performed from the side, and since there is a wall near the rear, if hot air is exhausted, hot air will be trapped and adversely affect the cooling effect. So it cannot be exhausted backwards. As a result, the air that has cooled the microwave oven is exhausted upward through the housing of the gas cooker, or is exhausted from the exhaust port 82a on the front as shown in the figure.

The kangaroo pocket is equipped with a display unit's operation unit on one side of the polyhedron, and it is stored in the cover so that it can rotate around the axis without being mounted on the other side, and is not mounted when not in use The surface is exposed from the cover, and the polyhedron is rotated to expose the mounting surface of the display unit and operation unit to control the display unit and operation unit during use, improving operability and malfunction due to erroneous contact. Can be prevented. The kangaroo pocket control unit 82c is provided on the side of the door in the conventional device. The reason is that if it is installed above the door, when the microwave oven opening / closing door 8 2 b is opened, the hot water vapor discharged from the heating chamber hits the liquid crystal display of the kangaroo pocket type control unit, fogging the liquid crystal display, This is because water vapor enters the kangaroo pocket control unit and causes electronic components to malfunction. This is to avoid this.

Also, in the case of a microwave oven that is built into the system kitchen, the height of the support base 83 is determined to be the same as the height of other equipment in the system kitchen, so it cannot be reduced this low. The heating chamber of the microwave oven is lower by the thickness of the exhaust port 82a, and the width of the heating chamber is narrower by the controller 82c. As described above, in the conventional built-in type apparatus, the heating chamber of the microwave oven was narrowed in all directions.

Furthermore, since the controller 82c was also located beside the door, the operator had to squat at the time of operation, making it difficult to operate (poor operability).

On the other hand, a built-in type microwave oven in which a control unit is provided above the device is also known (for example, see Patent Document 2).

(Patent Literature 2) Japanese Patent Application Publication No. 200-3—5 1 7 5 6 4

FIG. 18 is a perspective view of a main part of a built-in type microwave oven described in Patent Document 2. In the figure, 70 is a built-in type microwave oven described in Patent Document 2, 71 is a front surface of the microwave oven, 72 is a control panel, 73 is a suction grill, and 74 is an exhaust grill. The microwave oven 70 has a control panel 72 at the top of the front 71, and a suction grill 73 and an exhaust grill 74 provided directly below the control panel 72 so that cooling air can enter and exit from the front 71. The upper and lower heaters are provided inside, and the upper heater is provided in the upper part, the upper internal passage through which the air flow from the upper heater cooling fan passes is provided, and the lower heater is provided. Is provided with a cooling passage through which the air flow from the lower heater cooling fan passes, and a part of the air sucked from the suction grill 73 is directly supplied to the front of the exhaust grill 74 to pass through the heater. After joining with the high temperature air, it is exhausted from the exhaust grill. As a result, the temperature of the air exiting from the exhaust grille 74 can be lowered, and the operability is improved because the control panel 72 is located above.

However, since the exhaust grille 74 is provided below, dust on the floor is blown up, and there is a problem in hygiene. In addition, since the intake grill 73 and the exhaust grill 74 occupy the upper and lower sides of the front, the height of the device itself increases, and the microwave oven alone cannot be enlarged because of the built-in type. The size of the oven had to be reduced, and the internal volume of the heating chamber was narrow.

The present invention has been made in order to solve such a problem. By adopting a configuration in which the height of the exhaust grill is changed so that the height is not increased, it is not necessary to reduce the size of the microwave oven itself. It is intended to provide a built-in microwave oven that is hygienic, easy to use with a controller, and does not become cloudy even when steam is generated when the door is opened.

A microwave oven according to claim 1, wherein the heating unit accommodates an object to be heated, a high-frequency generator that supplies a high-frequency wave into the heating chamber, and a control unit that includes a control board that controls the device. A built-in type microwave oven, comprising: a blowing unit for sending cooling air into the control unit; and supplying a high frequency to the heating chamber to heat the object to be heated. The kangaroo pocket-type control unit is mounted on the front upper part of the microwave oven, and air from the blower is introduced into the kangaroo pocket-type control unit from the back surface of the kangaroo pocket-type control unit. The cooling air for the control board is exhausted from a rotation gap of the kangaroo pocket type control unit.

With this configuration, since the kangaroo pocket type control unit is mounted on the upper front of the apparatus, it is not necessary to bend each time the operation button is operated, and the operability is improved. In addition, there is a gap at the bottom of the kangaroo pocket type control unit so that it can be rotated originally, and air is exhausted from the gap, so there is no need to provide a separate exhaust port, and the device becomes less bulky and an air curtain is formed. The LCD display of the power control unit is no longer fogged, Since the blown cooling air is blown out at the top of the front of the device, dust is not rolled up and the device becomes clean.

According to a second aspect of the present invention, in the microwave oven according to the first aspect, the blower is provided on a back side of a back plate of the microwave oven. With this configuration, the intake port and exhaust port are separated at the back and front of the device, separating the device, so that warm air coming out of the exhaust port is not drawn in, improving cooling efficiency. .

The invention according to claim 3 is the microwave oven according to claim 2, wherein the air from the blower is guided to a space above the ceiling of the heating chamber, from which the kangaroo pocket type is provided. It is characterized in that it is guided to the back of the control unit.

With this configuration, the ceiling of the microwave oven is cooled. The invention described in claim 4 is the microwave oven according to claim 3, wherein the air from the blower is provided on a back side of a back plate of the microwave oven and the air is blown from behind the ceiling. A guide member that guides to a corner, a first partition plate that is provided on the back side of the ceiling and that stands in parallel with a side surface of the microwave oven at a predetermined interval, and is in contact with the first partition plate; and And a second partition plate erected at a predetermined interval from the kangaroo pocket control unit.

With this configuration, the cold air that has been drawn in mixes with the hot air that has cooled the outer periphery of the heating chamber, and the hot air does not reach the control board. It will be cooled.

A microwave oven according to claim 5, wherein the control unit includes a heating chamber for accommodating an object to be heated, a high frequency generator for supplying high frequency to the heating chamber, and a control board for controlling the apparatus. A built-in type microwave oven for supplying a high-frequency wave to the heating chamber to heat the object to be heated, comprising: a blowing unit for sending cooling air into the control unit; A notch or a slot extending in the length direction of the control unit is formed, and the control unit is attached to an upper portion of the front surface of the microwave oven, whereby the notch is provided between the control unit and the front surface of the microwave oven. Alternatively, a cooling air blowing gap is formed by a long hole, and air from the blowing unit is introduced into the control unit from the back surface of the control unit. The air cooled the control board is exhausted from the cooling air blowing gap.

With this configuration, since the control unit is mounted on the upper front of the apparatus, it is not necessary to squat down each time the operation button is operated, and the operability is improved. In addition, since air is exhausted from the cooling air blowing gap formed by a notch or a long hole between the control unit and the front of the microwave oven, it is not necessary to provide a separate exhaust port, so that the device is not bulky and an air curtain is formed. Therefore, the liquid crystal display of the control unit does not become fogged, and the cooling air is blown out at the upper part of the front of the device, so that dust is not rolled up and the device becomes clean.

According to a sixth aspect of the present invention, in the microwave oven according to the fifth aspect, the blowing unit is provided on a back side of a back wall of the heating chamber.

With this configuration, the intake port and exhaust port are separated at the back and front of the device, separating the device, so that warm air coming out of the exhaust port is not drawn in, improving cooling efficiency. .

The invention according to claim 7 is the microwave oven according to claim 6, wherein the air from the blower is guided to a space above a ceiling of the heating chamber, and from there, a back surface of the controller is formed. It is characterized by having led to.

With this configuration, the ceiling of the microwave oven is cooled. The invention according to claim 8 is the microwave oven according to claim 7, wherein the air from the blower is provided on a back side of a back wall of the heating chamber, and the air from the blowing section is provided on the underside of the ceiling. A guide member for guiding to a corner, a first partition plate provided on the back side of the ceiling, standing in parallel with a side surface of the microwave oven at a predetermined interval, and a contact with the first partition plate and the control; And a second partition plate erected at a predetermined interval from the part.

With this configuration, the cold air that has been sucked in does not mix with the hot air that has cooled the outer periphery of the heating chamber to become hot air and reaches the control board. It will be cooled.

The invention of a microwave oven according to claim 9 includes a heating chamber for accommodating an object to be heated, a high frequency generator for supplying a high frequency to the heating chamber, and a control board for controlling the device. A microwave oven for supplying a high-frequency wave to the heating chamber to heat the object to be heated, the control unit comprising: a wrapped control unit; and a blowing unit for sending cooling air into the control unit. A notch or slot extending in the length direction is formed, and the control unit is attached to an upper portion of the front of the microwave oven, whereby cooling by the notch or slot is provided between the control unit and the front of the microwave oven. An air blowing gap is formed, air from the blowing unit is introduced into the control unit from the back surface of the control unit, and air that has cooled the control board is exhausted from the cooling air blowing gap. It is characterized by

With this configuration, an air curtain is formed between the control unit and the heating chamber. Therefore, even if the door is opened and hot water vapor comes out of the heating chamber, air discharged from the notch or the long hole is formed. With the air curtain caused by the flow of water, the water vapor does not approach the control unit, hits the liquid crystal display unit and does not fog the liquid crystal display unit, and the water vapor does not enter the control unit and damage electronic components. Brief description of drawings>

FIG. 1 is a perspective view (first embodiment) of a microwave oven provided with a kangaroo pocket type control unit according to the present invention.

FIG. 2 is a perspective view of the kangaroo pocket type control unit viewed from the back.

FIG. 3 is a perspective view showing a part of the housing of FIG. 2 in a cutaway manner.

FIGS. 4A and 4B are side sectional views of the power control unit. FIG. 4A shows a non-use state, FIG. 4B shows a rotating state, and FIG. 4C shows a use state.

FIGS. 5A and 5B are front views of the kangaroo pocket control unit 401, in which FIG. 5A shows a state when used and FIG. 5B shows a state when not used.

FIG. 6 is a rear perspective view of a microwave oven to which the kangaroo pocket type control unit of FIG. 1 is attached.

FIG. 7 is a perspective view of the microwave oven of FIG. 6 as viewed from the front side.

FIG. 8 is a perspective view (second embodiment) of a microwave oven according to the present invention.

FIG. 9 is a perspective view of the control unit as viewed from the back. FIG. 10 is a perspective view of a microwave oven to which the control unit of FIG. 8 is attached, as viewed from the back.

FIG. 11 is a perspective view of the microwave oven of FIG. 10 as viewed from the front side, with the control unit removed.

Figure 12 is a brave view of the controller mounted on the microwave oven housing.

FIG. 13 is a perspective view of the control unit of the first modified example as viewed from the back.

FIG. 14 is a bold view of the controller of FIG. 13 mounted on a microwave oven housing. FIG. 15 is a perspective view of the control unit of the second modified example as viewed from the back.

FIG. 17 is a perspective view of a first built-in type conventional device described in Patent Document 1. FIG. FIG. 18 is a perspective view of a main part of a built-in type microwave oven described in Patent Document 2.

In the figures, reference numeral 10 denotes a microwave oven according to the present invention, 20 denotes a microwave oven housing, 201 denotes an intake fan, 202 denotes an intake fan cover, 203 denotes a guide plate, 204, 205 is a partition plate, 206 is a back plate, 206 a is a back plate opening, 207 is a ventilation path, 209 is a discharge space above the ceiling, 92 is a control unit storage room, 92 a Is the control unit receiving projection, 2 2 1 is the upper surface of the control unit storage room, 2 2 2 is the back surface of the control unit storage room, 2 2 2 a is the opening of the back of the control unit storage room, 2 2 3 is the lower surface of the control unit storage room, 2 23 a is a pin through hole, 23 is a heating chamber, 28 is a discharge port of a cooling system, 30 is an open / close door, 40, 40,, 40 ”is a control unit, and 40 a is a control. Notch at bottom, 40b is slot at bottom of control unit (1 slit), 40c is slot at bottom of control unit (divided), 41 is bottom plate, 401 is kangaroo pocket control unit, 4 2 displayOperation surface, 4 2 1 is liquid crystal display, 4 2 2 is operation switch, 4 3 is side plate, 4 3 a Is a pin insertion hole, 44 is a non-use exposed surface (non-installed surface), 46 is an exhaust surface, 46a is an exhaust surface opening, 48 is an intake surface, 48a is an intake surface opening, 49 Is the control board

Hereinafter, preferred embodiments of a microwave oven according to the present invention will be described in detail with reference to the drawings.

(First Embodiment) FIG. 1 is a perspective view of a microwave oven provided with a kangaroo pocket control unit according to the present invention.

In the figure, 10 is a microwave oven according to the present invention, 20 is a microwave oven housing, 23 is a heating chamber, 28 is a discharge port of another cooling system that cools the outer periphery of the heating chamber, 30 is an opening / closing door, Reference numeral 401 denotes a power-nggaroo pocket control unit, reference numeral 206 denotes a rear plate, reference numeral 206a denotes an opening provided in the rear plate 206, and reference numeral 207 denotes an air passage.

The microwave oven 10 is a heating cooker that supplies high frequency (microwave) to the heating chamber 23 for accommodating the object to be heated and dielectrically heats the object to be heated. A magnetron as a high-frequency generator, a circulation fan for stirring and circulating the air in the heating chamber 23, and a competition heater as a room air heating heater for heating the air circulating in the heating chamber 23. A temperature sensor for detecting the temperature in the heating chamber is provided as a main component.

The heating chamber is formed inside a box-shaped microwave oven 20 with an open front, and the front of the microwave oven 20 has a light-transmitting window that opens and closes the outlet of the heated chamber 23. A door 30 is provided. The lower end of the opening / closing door 30 is hinged to the lower edge of the microwave oven housing 20 so that the upper end moves in the front-rear direction with the lower end as a center of rotation, and can be opened and closed.

A predetermined heat-insulating space is secured between the wall surfaces of the heating chamber 23 and the microwave oven housing 20, and the outer periphery of the heating chamber is cooled by another cooling fan (not shown) and discharged from the discharge port 28. After that, it rises further and is exhausted upward through the housing of the electromagnetic cooker. This space is filled with insulation as needed.

In the figure, the microwave oven housing 20 is drawn out for easy understanding, but in fact, a large U-shaped exterior panel (not shown) covers the entire microwave oven housing 20 from above. Covering. .

2 to 5 show a kangaroo pocket type control unit according to the present invention.

Fig. 2 is a perspective view of the power garage pocket control unit 401 viewed from the back. Fig. 3 is a perspective view of the housing shown in Fig. 2 with a part of the housing cut away. Fig. 4 is a kangaroo pocket control. FIG. 5 is a side cross-sectional view of part 401, (a) shows when not in use, (b) shows during rotation, and (c) shows when in use. FIG. 5 is a front view of kangaroo pocket type control part 401. And (a) Indicates the time of use, and (b) indicates the time of nonuse. In FIG. 2, reference numeral 401 denotes a force-nggaroo pocket-type control unit according to the present invention, and this force-ngall bocket-type control unit 401 comprises a hollow triangular prism, square prism, pentagonal pillar, or the like. Can be done. Here, it is a quadrangular prism composed of surfaces 4 2, 4 4, 4 8, and 4 8, 4 2 is displayed and operation surface, 4 4 is the non-use exposed surface (non-mounting surface), 4 6 is the exhaust surface, 4 8 Is the intake surface. The exhaust surface 46 is provided with openings 46 a for exhausting cooling air according to the present invention, and the intake surface 48 is provided with a plurality of openings 48 a for intake of cooling air in the length direction. Both ends (left and right ends in the figure) of the square pillar are closed by side plates 43, and a pin insertion hole 43a is formed at the center of rotation. The pin P is passed through the pin insertion hole 4 3a together with the pin through holes 2 2 3 a formed at both ends of the control section storage chamber 9 2 (FIG. 7) fixed to the microwave oven body 20. Can rotate.

The display of the power-garage pocket type control unit 401The operation surface 42 displays the start of heating in addition to the liquid crystal display unit 421 (Fig. 5) indicating the control contents, heating temperature, heating time, etc. Various operation switches 422 (FIG. 5) such as a start switch to be instructed, a switching switch for switching between high-frequency heating and other heating methods, and an automatic cooking switch for starting a prepared heating program are provided.

A control board for controlling the liquid crystal display section 421 and the operation switch 422 is mounted inside the housing. FIG. 3 illustrates this control board 49.

The control board 49 is a printed circuit board on which electrical components for controlling and displaying a microwave, such as a CPU, are mounted. The control board 49 has a large number of heat-generating components mounted thereon and needs to be cooled.

In FIG. 4, the control unit storage room 92 is a U-shaped cross-section housing consisting of an upper surface 221, an inner surface 222, and a lower surface 223. 22 is fixed to the electronic range housing side. The back surface 222 has a large number of openings 222a in the longitudinal direction (FIG. 6). Further, a control part receiving projection 92a is provided on the control part storage chamber 92 side.

In order to rotate the kangaroo pocket type control unit 401 from the unused state to the use state, for example, a small knob is provided on the operation unit of the kangaroo pocket type control unit 401, and the pin P is pulled by pulling it. With the operation part protruding around Then, it may be returned to the storage state by returning it. Alternatively, a push button for pop-out operation and a press button for storage operation are provided on the microwave oven housing 20 side, and the former button is pressed to make the pop-out state, and the latter button is pressed. May be returned.

At the time of non-use in FIG. 4 (a), the intake surface 48 stabilizes while leaning against the control portion receiving protrusion 92a. In this state, when the kangaroo pocket type control unit 401 is not used, the exposed surface 44 is flush with the front surface of the control unit storage room 92. Therefore, the display-operation surface 42 is hidden inside the control unit storage room 92, and the control switch or the like does not operate due to erroneous contact or the like (see also FIG. 5 (b)). The cooling fan may continue to run for a certain period of time after the microwave oven has been used.However, even in such a case, the cooling air enters through the back opening 222 a, passes through the suction opening 48 a, and passes through the arrow. Then, cool the control board 49, and pass through the gap A between the kangaroo pocket-type control unit 401 and the lower surface 222 of the control unit storage room 92 from the exhaust surface opening 46a to the outside. Therefore, the control board 49 can be kept cooled.

In FIG. 4 (b), the kangaroo pocket type control unit 401 is rotating around the pin insertion hole 43 a inside the control unit storage room 92. When not in use, the exposed surface 4 4 starts to hide, and the display / operation surface 42 starts to be exposed, or vice versa. Also in this case, the cooling air can flow to the outside through the gap between the kangaroo pocket-type control unit 401 and the lower surface 223 of the control unit storage room 92 in the direction indicated by the arrow. Keep the control board 49 cool after using the range.

At the time of use in FIG. 4 (c), the suction surface front end 43 is stabilized in a state in which it leans against the front end hook portion 22 a of the upper surface 22 1 of the control section storage chamber 92. In this state, the display of the kangaroo pocket type control unit 401 and the operation surface 42 are in the supine state (approximately 45 degrees in the figure), making it easier to operate compared to the vertical control unit (Fig. 16). Become.

While the microwave oven is in use, the cooling fan keeps running, so the cooling air enters through the rear opening 22a and proceeds in the direction indicated by the arrow through the intake opening 48a to cool the control board 49. Since the air flows from the exhaust surface opening 46a to the outside through the gap A between the power-engaged pocket-type control unit 401 and the lower surface 222 of the control unit storage room 92, the control board 49 is cooled. be able to. In this way, the kangaroo pocket type control unit 4 The air after cooling is discharged through the gap A between the control compartments 9 and 2, so an air curtain is generated between the kangaroo pocket type control unit 401 and the opening and closing door 30 of the microwave oven 20. ing. Therefore, even if the open / close door 30 of the microwave oven 20 is opened during use and hot steam comes out of the heating chamber 23 and rises, the steam is brought closer to the kangaroo pocket type control unit 401 by the air curtain. In addition, no fogging of the liquid crystal display unit by hitting the liquid crystal display unit occurs, and similarly, water vapor does not enter the kangaroo pocket-type control unit 401 to damage electronic components.

When using Fig. 5 (a), the display of the power garage pocket type control unit 401 and the operation surface 42 are in the supine state (about 45 degrees in the figure), so that the liquid crystal display unit 4 21 is easy to see. Operation switch 4 2 2 is also easy to operate. In addition, the cooling air flows out through a gap between the kangaroo pocket-type control unit 401 and the lower surface of the control unit storage chamber 92 to form an air curtain.

When not used in Fig. 5 (b), the display / operation surface 42 is hidden, and the non-mounting surface 44 on which nothing is mounted is exposed instead. Therefore, the control switch or the like does not operate due to erroneous contact or the like. In addition, as long as the cooling fan is running, the cooling air flows out through the gap between the kangaroo pocket type control unit 401 and the lower surface of the control unit storage chamber 92 to form an air curtain. FIG. 6 is a perspective view of the microwave oven to which the kangaroo pocket type control unit 401 of FIG. 1 is attached as viewed from the back. In the figure, reference numeral 10 denotes a microwave oven, which is largely composed of a microwave oven housing 20 and an opening / closing door 30. The microwave oven housing 20 has an intake fan 201 for taking in air into the electronic range housing 20 below the rear plate 206 and a force par 20 covering the intake fan 201. 2 and a guide plate 203 for sending the air inside the cover 202 upward to the housing 20. When the intake fan 201 rotates, cool air is drawn in from the opening and enters the cover 202, passes through the guide plate 203, and passes through the guide plate 203. Sent up 20. An opening 206a (Fig. 1) is provided at the part where the guide plate 203 of the casing 20 comes into contact with the rear face of the casing 20, and the air that reaches upward passes through the opening 206a and the casing. Enter the ceiling of body 20. A partition plate 204 (Fig. 6) parallel to the side of the housing 20 at a predetermined distance from the ceiling, and a kangaroo pocket type control unit 401 that comes in contact with the partition plate 204 Partition plates 205 are provided in parallel at regular intervals.

These partition plates 204 and 205 cool the outer periphery of the heating chamber, which is another cooling system, and mix it with hot air discharged from the discharge port 28 (Fig. 1) to the discharge space 209 above the ceiling. Will not be done. Therefore, the cooled air discharged from the gap below the kangaroo pocket type control unit 401 does not become hot (more than 90 degrees), and there is no danger of burning the user. In addition, the hot air discharged from the discharge port 28 (Fig. 1) to the ceiling discharge space 209 after cooling the outer periphery of the heating chamber, which is another cooling system, is further drawn upward and rises in electromagnetic force. The air is exhausted upward from the rear corner through the rear of the cooker housing. The air passes through the air passage 207 formed between the side wall of the housing 20 and the partition plate, and flows toward the front of the housing 20, and the air flows between the control unit storage room 92 and the partition plate 205. The vehicle enters the back side of the kangaroo pocket-type control unit 401 through an opening 2 22 a provided in the control unit storage room 92 through a road. Thereafter, the air is discharged to the outside through the gap described above with reference to FIG. When the air is discharged from the gap, the air curtain effect functions to prevent vapor or the like from entering the kangaroo pocket type control unit 401. FIG. 7 is a perspective view of the microwave oven of FIG. 6 as viewed from the front side, and shows a state in which the power garage pocket control unit 401 is removed. As shown in Fig. 6, cool air flows from the lower part of the back of the microwave oven housing through the opening 206a provided in the upper corner of the rear plate 206 to the space above the ceiling of the housing 20. Enters, enters the kangaroo pocket-type control unit 401 from the opening 222 of the control unit storage room 92 through the passage 207, and is discharged to the outside through the route described in FIG. I can understand the situation. As described above, the control board 49 is built in the housing of the kangaroo pocket type control section 401, and since the control board 49 has a large number of electric and electronic components that generate heat, Requires cooling. Therefore, as described in Fig. 6, cool air is drawn in from the back of the microwave oven housing 20 (Fig. 1), and is led to the ventilation passage 207 from the opening 206a provided in the back plate 206. From there, through the opening 48 a (FIG. 2) of the intake surface 48 of the power nggaroo pocket type control unit 401, enter the inside, cool the control board 49 (FIG. 3), and then Kangaroo pocket type through 6 openings 4 6a (Figure 2) The air is exhausted to the outside of the casing of the control unit 401, and is discharged to the front of the microwave oven case 20 through the gap A between the kangaroo pocket type control unit 401 and the control unit storage room 92.

Therefore, when the opening / closing door is opened, hot steam is emitted from the heating chamber 23, but the air curtain is discharged by the air flowing through the gap A between the kangaroo pocket type control unit 401 and the control unit storage room 92. Thus, the water vapor does not approach the kangaroo pocket type control unit 401, and does not hit the liquid crystal display unit and fog the liquid crystal display unit. Similarly, water vapor is prevented from entering the kangaroo pocket control unit 401, and electronic components are not damaged.

In addition, since the operation unit is placed at the top of the device, it can be operated without squatting down, and since it is a kangaroo pocket, the control surface is not vertical but has a predetermined angle, so even if it is at the same top Operability is significantly improved as compared to the operation unit in Fig. 18.

The kangaroo pocket was originally not suitable for placing at the top of the heating room. This is because the kangaroo pocket needs a gap to be able to rotate, and this gap was an obstacle during the development experiment. For example, vapors penetrated into the kangaroo pocket through gaps, causing fouling of the liquid crystal display, heating and dampening electrical components, and other adverse effects.

In order to prevent the vapor from entering the interior, the applicant attempted an experiment by arranging a cushion in the gap, but this required an extra cushion and increased the number of man-hours for mounting, resulting in high cost. In addition, the aging of the cushion caused vapor to enter, and the operability (smooth rotation) of the kangaroo pocket became worse. Therefore, the present applicant has noticed that all of these drawbacks can be eliminated by positively using the gap, which is a drawback of providing a kangaroo pocket above the opening / closing door, as an air curtain outlet. By positively using the gaps in the kangaroo pocket as the air curtain outlets, cushions can be eliminated and the cost is reduced, and the air curtain effect eliminates the invasion of steam and improves operability. In addition to the new one, it was necessary to replace the original exhaust port (74 in Fig. 18), and this became unnecessary and space for the exhaust port was omitted. As described above, according to the microwave oven 10 of the present invention, the kangaroo pocket control unit 401 is attached to the upper front of the apparatus, so that it is not necessary to squat each time when operating the operation button. In addition, since air is exhausted from the opening gap of the kangaroo pocket type control unit 401, there is no need to provide a separate exhaust port, so the space inside the heating chamber can be increased, and the exhaust can be exhausted from the front of the device. Since it is carried out at the top of the garbage, dust is not rolled up and it is clean.

(Second embodiment)

FIG. 8 is a perspective view of a microwave oven according to the present invention.

In the figure, 10 is a microwave oven according to the present invention, 20 is a microwave oven housing, 23 is a heating chamber, 28 is a discharge port of another cooling system that cools the outer periphery of the heating chamber, 30 is an opening / closing door, 40 denotes a control unit, 206 denotes a rear surface, 206a denotes an opening provided in the rear plate 206, and 207 denotes a ventilation path.

The microwave oven 10 is a heating cooker that supplies high frequency (microwave) to the heating chamber 23 for accommodating the object to be heated and dielectrically heats the object to be heated. A magnetron as a high-frequency generator, a circulation fan for stirring and circulating the air in the heating chamber 23, and a convection heater as a room air heating heater for heating the air circulating in the heating chamber 23 And a temperature sensor for detecting the temperature in the heating chamber as main components.

A predetermined heat-insulating space is secured between the wall surfaces of the heating chamber 23 and the microwave housing 20.The outer circumference of the heating chamber is cooled by another cooling fan (not shown), and is discharged from the discharge port 28. After that, it rises further and is exhausted upward through the casing of the electromagnetic cooker. This space is filled with insulation as needed. In the figure, the microwave oven housing 20 is drawn out for easy understanding, but in fact, a large U-shaped exterior panel (not shown) covers the entire microwave oven housing 20 from above. Covering.

The control unit 40 is provided in advance with a start switch for instructing the start of heating, a liquid crystal display unit for displaying control content, heating temperature, heating elapsed time, and the like, and a switching switch for switching between high-frequency heating and other heating methods. Various operation switches such as an automatic cooking switch for starting a heating program are provided.

The housing of the control unit 40 has a U-shaped cross section, and the open side of the U-shape is attached to the housing of the microwave oven housing.

FIG. 9 is a perspective view of the control unit 40 as viewed from the back. In the figure, 40 is a control unit according to the present invention, 49 is a control board, and 40a is a notch provided in the edge of the bottom 41 of the control unit 40 in the length direction. The control board 49 is a printed board on which electric components for controlling the microwave oven and display such as CPU are mounted.

The control board 49 is thus built inside the housing of the control section 40, and since the control board 49 has a large number of electric and electronic components that generate heat, it is necessary to cool the control board 49. is there. Therefore, as will be described later, cool air is taken in from the back of the microwave oven housing 20 (FIG. 8), and is led to the ventilation passage 207 from the opening 206 a provided in the back plate 206, and from there. After being guided to the back of the control unit 40 to cool the control board of the control unit 40, the cooled air is discharged from the notch 40a (FIG. 9) at the lower end of the control unit 40.

As described above, according to the microwave oven 10 according to the present invention, since the control unit 40 is mounted on the upper front of the apparatus, it is not necessary to squat down when operating the operation button, and the operability is improved. Since the air is exhausted from the gap for cooling air blown out by the cutout between the control unit 40 and the front of the microwave oven 20, it is not necessary to provide a separate exhaust port, and the exhaust is performed at the top of the front of the device. As a result, dust is not rolled up and it becomes clean.

FIG. 10 is a perspective view of a microwave oven to which the control unit 40 of FIG. 8 is attached as viewed from the back. In the figure, reference numeral 10 denotes a microwave oven, which is largely composed of a microwave oven housing 20 and an opening / closing door 30. The microwave oven 20 has an intake fan 201 for taking air into the microwave oven 20 below the rear plate 206 and an intake fan. A cover 202 that covers the housing 201 and a guide plate 203 that sends the air in the cover 202 upward to the housing 20. The cover 202 is open downward, and when the intake fan 201 rotates, cool air is drawn in from the opening, enters the cover 202, and passes through the guide 扳 203 to the housing. Sent above body 20. An opening 206a (Fig. 8) is provided at the part of the rear plate 206 of the housing 20 that contacts the guide plate 203, and the air reaching upward passes through the opening 206a. Enter the ceiling of body 20. At the back of the ceiling, a partition plate 204 (Fig. 10) is placed in parallel with the side surface of the housing 20 at a predetermined distance, and contacts the partition plate 204 to form a predetermined distance from the control unit 40. A partition plate 205 is provided in parallel. Air passes through the air passage 207 formed between the side wall of the housing 20 and the partition plate, and flows toward the front of the housing 20 to form an air passage between the front plate 22 and the partition plate 205. Through the opening 22 a provided in the front plate 22, it enters the back side of the control unit 40. These partition plates 204, 205 cool the outer periphery of the heating chamber, which is another cooling system, and mix it with hot air discharged from the discharge port 28 (Fig. 8) to the discharge space 209 above the ceiling. Will not be done. Therefore, the cooled air discharged from the notch of the control unit 40 does not become hot (90 degrees or more), and there is no risk of burning the user. In addition, the hot air discharged from the discharge port 28 (Fig. 8) to the discharge space 209 above the ceiling after cooling the outer periphery of the heating chamber, which is another cooling system, is further drawn upward and rises in electromagnetic force. Exhausted from the rear corner up through the back of the cooker housing

FIG. 11 is a perspective view of the microwave oven of FIG. 10 as viewed from the front side, with the control unit 40 removed. The air entering the ceiling of the housing 20 from the opening 206 a provided in the upper corner of the rear plate 206 passes through the passage 207 from the opening 22 a of the front plate 22. The control unit 40 is entered.

The air that has entered the control unit 40 cools the control board 49 (Fig. 9) on which a number of heat-generating components are mounted, and then flows through the cutout 40a (Fig. 9) at the lower end of the control unit 40. Emitted.

FIG. 12 is a bold view of the controller 40 attached to the microwave oven housing 20. It can be seen that a gap between the control unit 40 and the microwave oven housing 20 is formed by the notch 40a of the control unit 40. Then, the air that has cooled the control board 49 (FIG. 9) is discharged from the notch 40a to the front of the housing 2. Therefore, when the opening / closing door is opened, hot steam is emitted from the heating chamber 23.However, the steam is prevented from approaching the control unit 40 by the air curtain due to the flow of the air exhausted from the cutout 40a, and hits the liquid crystal display unit. The liquid crystal display does not fog. Similarly, water vapor is prevented from entering the control unit 40, and electronic components are not damaged.

Although the notch 40a is provided at the bottom 41 of the control unit 40 according to the present invention, the present invention is not limited to this, and is shown in FIGS. 13 and 15. _c Figure 1 3 goes without saying that obtained the same effect be provided Suyo long hole is a rear perspective view of the controller as a first modified example.

In the figure, reference numeral 40 denotes a control unit according to the first modified example, 49 denotes a control board, and 40 b denotes a single slot provided along the edge of the bottom 41 of the control unit 40 ′. Slit). The size of the long hole 40b is equal to the notch area of the notch 40a in FIG.

In this way, as shown in FIG. 14 which is a brave diagram of the controller 40, the air that has cooled the control board inside the controller 40 ′ flows to the bottom of the controller 40 ′. The air curtain is formed from the long hole 40b of 41 by being discharged out of the microwave oven. Therefore, even if the open / close door is opened and hot steam comes out of the heating chamber 23, the steam does not approach the control unit 40, due to the air curtain due to the flow of air exhausted from the notch 40b, and the liquid crystal display No fogging of the liquid crystal display portion is caused by hitting the portion. Similarly, FIG. 15 is a perspective view of a control unit as a second modification as viewed from the back. In the figure, 40 "is a control unit according to the second modification, 49 is a control board, and 40c is a plurality of long holes provided along the edge of the bottom 41 of the control unit 40. The sum of the sizes of the long holes 40c is equal to the notch area of the notch 40a in Fig. 9. In this case, the parts that require particularly strong cooling, for example, the lower part of the liquid crystal display, It is better to make the length of the long hole provided longer than the others By doing so, the strength of the control unit housing can be made higher than that of one long hole shown in FIG. The action of the divided slots is the same as that of FIG. 13, and the air that has cooled the control board inside the control section 40 is separated from the slots 41 c of the bottom section 41 of the control section 40 ″. Is discharged out of the storage of the electron range, and an air curtain is formed by the flow of air. Therefore Even if the opening / closing door is opened and hot steam is emitted from the heating chamber 23, the air curtain is created by the flow of air exhausted from the notch 40c. No fogging of the liquid crystal display portion occurs.

The present invention has been described above with reference to the built-in type microwave oven. However, the air curtain by the flow of air discharged from the cutout of the control unit according to the present invention is effective only for the built-in type microwave oven. It goes without saying that the same applies to the control unit of an independent microwave oven alone.

Therefore, even in the case of a microwave oven that heats an object to be heated by supplying high frequency to the heating chamber, a cutout or a hole extending in the length direction of the control unit is formed at the bottom of the control unit. By attaching the control unit to the upper part of the front of the microwave oven, there is a notch or slot for cooling air blowing between the control unit and the front of the microwave oven, so the air from the blower is controlled. If the air that has cooled the control board is exhausted from the cooling air blowing gap from the back of the unit into the control unit and an air curtain is formed between the control unit and the heating chamber, the door is Even if hot water vapor comes out of the heating chamber when it is opened, the water vapor does not come close to the control part, but hits the liquid crystal display part and fogs the liquid crystal display part with an air curtain due to the flow of air discharged from the notch or slot. Yo No whirling occurs and no water vapor can enter the controls and damage electronic components.

Although the present invention has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention.

This application is based on Japanese Patent Application No. 2003-169452 filed on June 13, 2003 and Japanese Patent Application No. 2003-169382 filed on June 13, 2003, the contents of which are hereby incorporated by reference. It is captured.

Industrial applicability>

As described above, according to the microwave oven according to claim 1 of the present invention, a heating chamber for accommodating an object to be heated, a high frequency generator for supplying a high frequency to the heating chamber, A control unit including a control board for controlling the apparatus, and a blowing unit for sending cooling air into the control unit, a built-in type microwave oven that supplies a high frequency to the heating chamber and heat-treats the object to be heated. The control unit is constituted by a single kangaroo pocket extending in the longitudinal direction, the kangaroo pocket type control unit is mounted on the upper front of the microwave oven, and air from the blowing unit is supplied by the kangaroo pocket type. Since the air introduced into the kangaroo pocket-type control unit is introduced from the back surface of the control unit and the air that has cooled the control board is exhausted from the rotation gap of the kangaroo pocket-type control unit, when operating the operation device, Eliminates the need to squat down each time, improving operability and providing a separate exhaust port to exhaust air from the opening gap of the kangaroo pocket type control unit. Essential with is eliminated device is not bulky, since the air curtain is formed, that such not occur that as kangaroo pocket type controller liquid crystal display of fog.

According to the second aspect of the present invention, since the blower section is provided on the back side of the microwave oven, the intake port and the exhaust port are separated at the back and the front with the device interposed therebetween. It does not draw in warm air coming out of the mouth, improving cooling efficiency.

According to the invention set forth in claim 3, air from the blower is guided to the back of the ceiling of the heating chamber and from there to the back of the kangaroo pocket control unit, so that the ceiling of the microwave oven is It will be cooled.

According to the invention set forth in claim 4, a guide member provided on the back side of the back plate of the microwave oven to guide the air from the blower to the corner behind the ceiling, and on the back side of the ceiling A first partition plate erected in parallel with a side surface of the microwave oven at a predetermined interval and a first partition plate in contact with the first partition plate and at a predetermined interval from the power Ngaroo pocket type control unit. And a second partition plate to be erected. With this configuration, the cold air that has been drawn in mixes with the hot air that has cooled the outer periphery of the heating chamber, and the hot air does not reach the control board. It will be cooled.

According to the microwave oven as set forth in claim 5, a cutout or a long hole extending in a longitudinal direction of the control unit is formed at a bottom of the control unit, and the control unit is provided on an upper front surface of the microwave oven. By attaching, the cut-off between the control unit and the front of the microwave oven. Since the cooling air blowing gap is formed by notches or slots, it is not necessary to squat each time when operating the actuator, which improves operability, and the notch between the control unit and the front of the microwave oven. Alternatively, since air is exhausted from the cooling air blowing gap formed by the long holes, it is not necessary to provide an exhaust port separately, so that the device does not become bulky and an air curtain is formed, so that the liquid crystal display of the control unit may become fogged. No longer.

According to the invention as set forth in claim 6, since the blower section is provided on the back side of the microwave oven, the intake port and the exhaust port are separated at the back and the front with the device interposed therebetween. It does not draw in warm air coming out of the mouth, improving cooling efficiency.

According to the invention set forth in claim 7, the air from the blower is guided to the back of the ceiling of the heating chamber and from there to the back of the controller, so that the ceiling of the microwave oven is cooled. It becomes.

According to the invention set forth in claim 8, a guide member provided on the back side of the back wall of the heating chamber to guide the air from the blower section to the corner behind the ceiling, A first partition plate provided in parallel with a side surface of the microwave oven at a predetermined interval and a first partition plate standing in contact with the first partition plate and at a predetermined interval from the control unit. (2) With the partition plate and, the intake of cold air does not mix with the hot air that has cooled the outer periphery of the heating chamber and the heated air reaches the control board. The substrate will be cooled.

According to the invention as set forth in claim 9, even in a single microwave oven, an air curtain is formed between the control unit and the heating chamber, so that the door is opened and hot steam is emitted from the heating chamber. However, with the air force due to the flow of air discharged from the notch or slot, the water vapor does not come close to the control unit, hits the liquid crystal display unit and does not cloud the liquid crystal display unit, and the water vapor is controlled. There is no chance that electronic components will break down inside the department.

Claims

The scope of the claims

1. A heating chamber for accommodating an object to be heated, a high-frequency generator for supplying high-frequency waves to the heating chamber, a controller including a control board for controlling the apparatus, and a blower for sending cooling air into the controller. A built-in type microwave oven that supplies a high frequency to the heating chamber and heat-treats the object to be heated,

The control unit is constituted by a kangaroo pocket extending in the longitudinal direction, the kangaroo pocket-type control unit is attached to an upper front portion of the microwave oven, and air from the blower unit is blown from the back of the power-nggaroo pocket type control unit. The power introduced into the power-nggaroo-pocket-type control unit and the air that has cooled the control board is exhausted from a rotation gap of the power-nggaroo-pocket-type control unit.

2. The electronic device according to claim 1, wherein the blower is provided on a back side of the microwave oven.

3. The electricity according to claim 2, wherein the air from the blower is guided to the back of the ceiling of the heating chamber, and from there to the back of the kangaroo pocket control unit.

4. A guide member provided on the back side of the back plate of the microwave oven to guide air from the blower to a corner behind the ceiling, and a guide member provided on the back side of the ceiling, wherein a side surface of the microwave A first partition plate erected in parallel with an interval and a second partition plate in contact with the first partition plate and erected at a predetermined interval from the kangaroo pocket control unit. The electronic device according to claim 3, wherein

5. A heating chamber for accommodating an object to be heated, a high-frequency generator for supplying high-frequency waves into the heating chamber, a control unit including a control board for controlling the apparatus, and cooling air flowing into the control unit. A built-in type microwave oven for supplying a high frequency wave to the heating unit to heat the object to be heated,

A notch or a hole extending in the longitudinal direction of the control unit is formed at the bottom of the control unit, and the control unit is attached to an upper portion of the front of the microwave oven. A cooling air blowing gap formed by the cutouts or the long holes between the air passages, introducing air from the blowing unit into the control unit from a back surface of the control unit, and cooling the control board with the cooling air. The electricity is characterized by exhausting through the air gap. "

6. The electrode according to claim 5, wherein the blower is provided on the back side of the electrode.

7. The electron range according to claim 6, wherein the air from the blower section is guided to the space above the ceiling of the heating chamber and from there to the rear surface of the control section.

8. A guide member provided on the back side of the back wall of the heating chamber to guide air from the blower to the corner of the back of the ceiling; provided on the back side of the ceiling; A first partition plate standing in parallel at an interval and a second partition plate standing in contact with the first partition plate and at a predetermined interval from the control unit. The electricity described in claim 7 "

9. A heating chamber for accommodating an object to be heated, a high-frequency generator for supplying high-frequency waves to the heating chamber, a controller including a control board for controlling the apparatus, and a blower for sending cooling air into the controller. A microwave oven that supplies a high frequency to the heating chamber and heat-treats the object to be heated.

A notch or a hole extending in the longitudinal direction of the control unit is formed at the bottom of the control unit, and the control unit is attached to an upper portion of the front of the microwave oven. The gap for cooling air blowing by the notch or slot Wherein air from the air blowing unit is introduced into the control unit from the back surface of the control unit, and air that has cooled the control board is exhausted from the cooling air blowing gap. "