JP6270773B2 - Cooker - Google Patents

Description

  The present invention relates to a cooking device, and more particularly to a cooking device provided with a heating cabinet of a type in which hot air is circulated by a circulation fan.

In recent years, convection-type ovens using hot air circulation have become widespread, and built-in heating cookers in which such ovens are incorporated as heating chambers have been proposed (for example, Patent Documents 1 and 2).
This type of heating cooker contains a heating chamber together with a mechanism unit that incorporates valve devices, piping, etc. in a case body that is installed in a state where it is dropped into an opening provided in a countertop of a cabinet. The operation panel unit for operating the door or mechanism of the heating chamber provided on the front surface of the case body is exposed through the front opening of the cabinet.

  Further, the heating chamber as the hot-air circulation type oven as described above includes a combustion chamber that burns gas with an oven burner to generate combustion exhaust gas, a heating chamber that communicates with the combustion chamber and accommodates an object to be cooked. And a circulation fan, and a motor for rotating the circulation fan is disposed behind the circulation fan.

In the above heating chamber, a motor for rotating the circulation fan is accommodated in a motor accommodation chamber behind the circulation fan, and a cooling fan is provided coaxially with the circulation fan between the motor accommodation chamber and the circulation fan. ing. In addition, an air inlet made up of a large number of small openings communicating with the rear outside of the case body is formed on the back surface of the motor housing chamber.
In this case, the circulation fan is driven to rotate by driving the motor, and air outside the case body is taken into the combustion chamber as secondary air for combustion, and at the same time, the cooling fan is driven to rotate, so that the rear surface of the case body The outside air is taken into the motor housing chamber from the air intake port and the motor is cooled.

Japanese Patent Laying-Open No. 2015-7516 JP 2014-202382 A

  By the way, in the above-mentioned cooking device, the intake port for taking in cooling air for cooling the motor is formed in the back surface of the motor housing chamber communicating with the rear outside of the case body, so the intake port is cleaned and maintained. If the air intake is clogged with dust or oil, it is difficult to take cooling air into the motor housing chamber.

  On the other hand, in the one disclosed in Patent Document 2, since the intake port through which cooling air is taken in by the rotational drive of the cooling fan is provided on the lower front side of the combustion chamber, the intake port is cleaned from the front side of the cabinet. It can be done easily.

  However, in this case, since the cooling air insertion passage extending from the intake port to the motor housing chamber is disposed below the combustion chamber, the bottom plate of the combustion chamber heated by the combustion flame ejected from the flame hole group of the oven burner As a result, the external air taken in from the intake port is warmed while passing through the cooling air passage. As a result, since heated air is supplied to the motor housing chamber, there arises a problem that the motor cannot be sufficiently cooled.

  The present invention has been made in view of the above-described problems. A circulating fan takes outside air into the combustion chamber to burn the oven burner and sends hot air generated in the combustion chamber to the upper heating chamber for circulation. In a heating cooker with a built-in heating cabinet, to cool the motor that drives the circulation fan to rotate, the temperature of the motor cooling air taken in from the outside is suppressed and maintenance of the air inlet for cooling air is easy The purpose is to be able to.

The present invention taken to achieve the above object
A heating chamber is housed in the case body,
The heating cabinet is
A heating chamber having a door portion to be cooked and opening to the front surface of the case body;
A combustion chamber located below the heating chamber and provided with an oven burner for generating hot air;
A circulation fan that takes in the secondary air for combustion of the oven burner into a combustion chamber and circulates hot air generated in the combustion chamber by combustion of the oven burner into the heating chamber;
A motor that is housed in a motor housing chamber behind the heating chamber and that rotationally drives the circulation fan;
A cooling fan provided coaxially between the motor and the circulation fan and sending external cooling air into the motor housing chamber is disposed;
A cooking device in which a side space is provided in a range from one side or both sides of the heating chamber to the rear surface portion of the main body case,
The cooling air intake port that takes in external cooling air by rotating the cooling fan is provided on the front surface of the case body or the rear lower surface of the front surface,
A cooling air insertion passage extending from the cooling air intake port to the motor housing chamber is provided in the side space portion ,
A mechanism part comprising various devices is disposed in the side space part,
The operation panel unit for operating various devices of the mechanism unit is exposed in parallel with the door of the heating chamber on the front surface of the case body.
The cooling air intake port is a front surface portion of the case body, and is provided on the rear lower surface of the operation panel portion,
The cooling air insertion passage is a cooking device provided below the mechanism portion and along the bottom surface of the case body .

According to the heating cooker, the heating chamber includes a heating chamber, a combustion chamber, and a circulation fan, and a cooling fan and a motor are disposed behind the heating chamber. And the side space part from the front surface part of a main body case to a rear surface part is provided in the one side or both sides of the said heating chamber.
When the oven burner is ignited, the motor is driven and the circulation fan is driven to rotate, whereby the combustion secondary air is taken into the combustion chamber from the air supply port in front of the combustion chamber, and combustion of the oven burner is started. The hot air generated by the combustion of the oven burner is sent to the heating chamber by the circulation fan and circulated in the heating chamber.
Simultaneously with the rotation drive of the circulation fan, the cooling fan provided coaxially with the circulation fan also rotates, so that the cooling air intake port provided on the front surface of the case body or the rear lower surface of the front surface of the case body Cooling air outside the front is taken into the case main body and is sent to the motor housing chamber through the cooling air insertion passage.
By providing the cooling air intake port on the front surface of the case body or the lower surface located behind the front surface, the cooling air intake port can be easily cleaned and maintained because the user can reach the cooling air intake port. It becomes.
In addition, the combustion chamber forming plate is heated by the combustion flames formed in the flame hole group of the oven burner, and the side space provided on the side of the heating chamber is a space near the combustion chamber. It is hard to become high temperature than. Therefore, the temperature of the side space in the case body is kept relatively low. And since it was set as the structure which provides a cooling air insertion path in this low temperature side space part, the temperature of the air which passes a cooling air insertion path does not rise easily. Therefore, since the external air taken in from the cooling air intake port can be sent to the motor housing chamber without increasing the temperature, the motor can be sufficiently cooled.

In this configuration, since the cooling air intake port is provided on the rear lower surface of the operation panel exposed at the front surface of the case body, cleaning and maintenance of the cooling air intake port are further facilitated. Moreover, and a lateral space, below the cold mechanism portion than the peripheral combustion chamber, along the bottom portion of the case body, because was configured to provide a cooling air insertion path, the cooling air through passages The temperature rise of the passing air is suppressed, and the cooling performance of the motor by the external cooling air can be further improved.

In the heating cooker, preferably,
A cooling air intake opening opens on the back of the motor housing chamber,
A first insertion hole communicating with the downstream end of the cooling air insertion passage and a second insertion hole at a position corresponding to the cooling air intake port are formed in the rear surface portion of the case body,
The cover part which connects the said 1st, 2nd insertion hole is a heating cooker provided in the outer surface of the rear surface part of a case main body.
In this case, the air outside the front taken in from the cooling air intake port on the front surface of the case body or the rear lower surface of the front surface passes through the cooling air insertion passage and passes through the first insertion hole on the rear surface of the case body. After exiting to the rear outside of the case main body, the motor can be cooled by the air sent from the cooling air intake port to the motor housing chamber through the cover portion, returning from the second insertion hole into the case main body.

As described above, according to the present invention, the cooling air intake port that takes in the cooling air for cooling the motor is provided on the front surface of the case body that can be reached by the user or on the rear lower surface of the front surface. Therefore, even if the cooling air intake port is clogged with dust or oil, the cooling air intake port can be easily cleaned and maintained. Therefore, the cooling air intake port is closed, and overheating of the motor due to the lack of cooling air can be prevented.
In addition, after the air outside the front of the case body is taken in from the cooling air intake port, it passes through the cooling air insertion passage provided in the side space located on the side of the heating chamber, and the motor housing chamber Therefore, the temperature rise during passage through the cooling air passage is small. Therefore, the motor can be sufficiently cooled.

By providing the cooling air insertion passage along the bottom surface of the case main body and below the mechanism portion provided in the side space in the case main body , the temperature rise of the air passing through the cooling air insertion passage can be increased. Since it can prevent reliably, the cooling performance of the motor by external cooling air can be improved further.

  In addition, first and second insertion holes are provided in the rear surface portion of the case body, and the external air that has been taken in from the cooling air intake port on the front surface portion of the case body or the rear lower surface of the front surface portion is temporarily inserted into the first time. After taking out from the hole to the rear outside of the side space portion of the case body, it is taken into the case body again from the second insertion hole and sent into the motor housing chamber from the cooling air intake port on the back surface of the motor housing chamber. In the thing, cooling air can be reliably sent to a motor storage chamber. Therefore, the cooling performance of the motor is further improved.

It is a front view which shows the heating cooker in embodiment of this invention. It is a schematic longitudinal cross-sectional perspective view which shows the heating chamber of the heating cooker in embodiment of this invention. It is a schematic cross-sectional perspective view of the heating cooker in embodiment of this invention. It is a general | schematic longitudinal cross-section disassembled perspective view by the side of the mechanism part of the heating cooker in embodiment of this invention. It is a schematic longitudinal cross-sectional view which abbreviate | omitted the mechanism part of the heating cooker in embodiment of this invention.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a front view of a built-in heating cooker as a heating cooker according to an embodiment for carrying out the present invention, FIG. 2 is a schematic longitudinal sectional perspective view of a heating cabinet side, and FIG. It is a schematic cross-sectional perspective view of the said heating cooker.
In this case, the case main body (1) is assembled in the state of being dropped into the opening of the countertop of the system kitchen, and the case main body (1) includes the front surface portion (19), the rear surface portion (16), the bottom surface portion (17 ) And both side surface portions (18), and is formed in a box shape open upward. In the case body (1), a heating chamber (100) as an oven, and a side space provided on the side of the heating chamber (100), a valve device (not shown), a control device, piping, and the like are incorporated. The mechanism portion (110) is accommodated in parallel in the left-right direction.
The heating chamber (100) includes a heating chamber (10) in which an object to be cooked is accommodated, and a combustion chamber (20) provided below and having an oven burner (2). As shown in FIG. 3, a substrate (37) is extended on the side of the bottom plate (23) of the), and a mechanism portion (110) is disposed on the substrate (37).
The front part (19) of the case body (1) includes a door part (11) for opening and closing the front of the heating chamber (10) and operation buttons for operating various devices of the mechanism part (110). In addition, an operation panel portion (13) that can be rotated forward with the lower end portion as a rotation fulcrum is disposed.
In this specification, the door (11) side of the heating chamber (10) is referred to as the front, the back side is referred to as the rear, the width direction of the heating chamber (10) is referred to as the left-right direction, and the height direction is referred to as the up-down direction.

  The door (11) on the front surface of the heating chamber (10) is rotated forward (front), the heating chamber (10) is opened, and the plate (52) is pulled out from the heating chamber (10). On the plate (52), for example, an object to be cooked such as bread, cake or gratin or roast chicken is placed, and then the plate (52) is returned to the heating chamber (10) and the door (11 ) Is rotated rearward to close the heating chamber (10), the cooking object is accommodated in the heating chamber (10).

  As shown in FIG. 2, the upper rear portion of the heating chamber (10) communicates with the combustion exhaust passage (5) following the exhaust port (50) via a number of exhaust holes (12a). 10) On the left and right sides of the rear wall (15), a number of blow holes (15a) (15a) for sending hot air into the heating chamber (10) are formed. A number of suction holes (15b) for taking in the hot air in (10) are formed. Further, behind the rear wall (15) of the heating chamber (10), a hot air passage (30) for circulating hot air of the combustion exhaust gas generated in the combustion chamber (20) to the heating chamber (10) is formed. Yes.

An oven burner (2) is disposed in the rear region in the combustion chamber (20), and the rear thereof communicates with the hot air passage (30). Further, an air supply port (21) including a large number of openings for taking in external air is formed in front of the combustion chamber (20).
The air taken in from the air supply port (21) is sent to the flame hole group of the oven burner (2) as secondary air for combustion.

As shown in FIGS. 2 and 3, the hot air passage (30) is surrounded by a hot air passage case (40) on both sides and the rear, and is formed in the center of the rear wall (15) of the heating chamber (10). The heating chamber (10) communicates with the suction hole (15b).
A circulation fan case (41) is disposed behind the rear wall (15) of the heating chamber (10) so as to surround the hot air passage case (40) from both sides and from the rear. The circulation fan case (41) accommodates the circulation fan (31), and the rear surface of the circulation fan case (41) is blocked except for the insertion hole through which the rotating shaft (45) of the motor (4) is inserted. The circulation fan (31) is fixed to the tip of the rotating shaft (45). Then, the upper end, lower surface, and front end portions of both sides of the circulation fan case (41) are joined and closed with the peripheral edge of the rear wall (15), and an opening formed in the hot air passage case (40) ( 40a) communicates with the hot air passageway (30).

  Further, the outside of the hot air passage case (40) in the circulation fan case (41) is a circulation passage (32), and the air supply port (21) is driven by rotating the circulation fan (31). The air outside the front of the case body (1) is taken into the combustion chamber (20) and sent to the flame hole group of the oven burner (2) as secondary air for combustion to burn the oven burner (2). Starts and hot air of combustion exhaust gas is generated. The hot air generated in the combustion chamber (20) is sucked into the circulation passage (32) from the opening (40a) through the hot air passage (30), and is formed on the left and right sides of the rear wall (15). (15a) (15a) is sent into the heating chamber (10), and the hot air in the heating chamber (10) is sucked through the suction hole (15b) formed in the center of the rear wall (15). Then, hot air can be circulated in the heating chamber (10), and the cooking object accommodated in the heating chamber (10) can be cooked in the oven.

Behind the circulation fan case (41) are provided a cooling fan case (43) in which a cooling fan (33) is accommodated and a motor housing chamber (44) in which a motor (4) is accommodated. 33) is fixed to the rotating shaft of the motor (4) between the circulation fan case (41) and the motor housing chamber (44).
The cooling fan case (43) and the motor housing chamber (44) are located in the space between the circulation fan case (41) and the rear surface portion (16) of the case body (1), and Is formed with a cooling air intake opening (42) having a large number of openings.

As shown in FIGS. 1 and 5, the cooling air intake port (14) that takes in external cooling air by rotating the cooling fan (33) is an operation panel portion of the front surface portion (19) of the case body (1). The air outside the case body (1) is taken in from the bottom of the case body (1) and is taken from the bottom of the case body (1). It passes through the space between (17) and the substrate (37) of the mechanism part (110) and is sent to the rear surface part (16) of the case body (1). A space provided between the substrate (37) of the mechanism portion (110) and the bottom surface portion (17) of the case body (1) functions as a cooling air insertion passage (27).
As shown in FIGS. 3 and 4, a first insertion hole (16a) is formed on the cooling air insertion passage (27) side of the rear surface portion (16) of the case body (1), and the motor is accommodated. A second insertion hole (16b) is formed at a location corresponding to the cooling air intake port (42) of the chamber (44).
The circulation passage (32) and the cooling air insertion passage (27) are separated from each other by the circulation fan case (41) so as to be disconnected, and heat is supplied to the cooling air flowing in the cooling air insertion passage (27). Is configured not to flow in.

In the range including both the first and second insertion holes (16a) and (16b) of the rear surface portion (16) of the case body (1), as shown in FIG. 4, the front cover portion (61) and the rear cover A cover part (6) comprising a part (62) is mounted.
First and second openings (61a) and (61b) are formed at positions corresponding to the first and second insertion holes (16a) and (16b) of the front cover portion (61). When the parts (61) and (62) are assembled, the cover part (6) which is a hollow box body in which the first and second openings (61a) and (61b) are opened is formed on the front side.

As a result, as shown in FIGS. 3 to 5, the cooling fan (33) rotates and is taken in from the cooling air intake port (14) provided on the rear lower surface of the front surface portion (19) of the case body (1). The air outside the front passes through the cooling air insertion passage (27) located below the mechanism portion (110), passes through the first insertion hole (16a) and the front cover of the rear surface portion (16) of the case body (1). It flows into the cover part (6) attached to the rear of the case body (1) through the first opening (61a) of the part (61), the second opening (61b) of the front cover part (61), and the rear surface part. It is sent into the motor housing chamber (44) through the second insertion hole (16b) of (16) and the cooling air intake port (42) to cool the motor (4).
The front cover portion (61) is not necessarily required, and the rear cover portion (62) may be directly attached to the rear surface portion (16) of the case body (1) by screws.

The case where cooking is performed using the gas stove of the present embodiment will be described.First, the door (11) is rotated forward, the plate (52) in the heating chamber (10) is pulled out, and the top Next, after placing an object to be cooked such as bread, cake, gratin, or roast chicken, the door (11) is rotated backward to close the front opening of the heating chamber (10).
Then, although not shown, when the cooking start switch provided in the operation panel section (13) is turned on, the motor (4) is driven and the circulation fan (31) is started to rotate, and the combustion chamber (20 Combustion air is taken in from an air supply port (21) on the front side of), and the oven burner (2) is ignited to start combustion.
The hot air of the combustion exhaust gas generated in the combustion chamber (20) is sent to the hot air passage (30), and from the opening (40a) of the hot air passage case (40) through the circulation passage (32), the rear wall (15) It is sent out into the heating chamber (10) from the blow holes (15a) (15a) formed on both the left and right sides. Then, the hot air sent into the heating chamber (10) returns to the hot air passage (30) from the central suction hole (15b) of the rear wall (15), and again, the opening (40a of the hot air passage case (40) ), The circulation passage (32), and the blowout holes (15a) and (15a) to be returned to the heating chamber (10).

  Thus, the cooking object can be oven-cooked by the hot air circulated in the heating chamber (10), and the combustion exhaust generated in the heating chamber (10) constitutes the ceiling of the heating chamber (10). From the exhaust hole (12a) formed in the upper wall (12) that passes through the combustion exhaust passage (5), it is discharged to the outside from the exhaust port (50).

  In addition, the cooling fan (33) is rotationally driven simultaneously with the rotational driving of the circulation fan (31). As a result, the air outside the front of the main body case (1) is cooled from the cooling air intake port (14) on the lower rear surface of the operation panel (13) provided on the front surface (19) of the main body case (1). The air is taken into the insertion passage (27) and flows rearwardly through the cooling air insertion passage (27). The first insertion hole (16a) of the rear surface portion (16) and the first cover portion (61) It is fed into the cover part (6) through the opening (61a), and the motor accommodation chamber (via the second opening (61b), the second insertion hole (16b), and the cooling air intake port (42)). 44), the motor (4) is cooled and then discharged from the exhaust port (50) through the cooling air exhaust passage (51).

In the heating cooker of the present embodiment, the cooling air intake port (14) is provided on the rear lower surface of the front surface portion (19) of the case body (1), so that it is used for the cooling air intake port (14). Can reach. Therefore, even if the cooling air intake port (14) is blocked by oil, dust, etc., it can be easily cleaned and maintained, so the cooling air intake port (14) is blocked and the cooling air sent to the motor housing chamber (44) It is possible to prevent inconvenience that the amount of air is insufficient.
In addition, the cooling air outside the front of the case body (1) taken in from the cooling air inlet (14) by the rotation drive of the cooling fan (33) is a side space located on the side of the heating chamber (100). Is set to pass through the cooling air insertion passage (27) provided between the bottom surface portion (17) of the case body (1) and the mechanism portion (110). The air passing through the passage (27) is hardly heated by the radiant heat of the combustion chamber (20) heated to a high temperature, and the temperature rise of the air in the cooling air insertion passage (27) can be suppressed. Therefore, external cooling air can be efficiently sent to the motor (4) for cooling, and overheating of the motor (4) can be reliably avoided.
In the above embodiment, the cooling air insertion passage (27) is provided along the bottom surface portion (17) of the case body (1) below the mechanism portion (110), but the heating chamber (100) A cooling air insertion path (27) may be provided along the side surface (18) of the case body (1) in the side space on the side.

(1) ・ ・ ・ ・ ・ ・ ・ ・ ・ Case body
(100) ・ ・ ・ ・ ・ ・ ・ ・ Heating chamber
(10) ... Heating chamber
(11) ... Door
(14) ... Air inlet for cooling air
(16) ... Rear part
(17) ... Bottom
(19) ... Front part
(2) ・ ・ ・ ・ ・ ・ ・ ・ ・ Oven burner
(20) ... combustion chamber
(27) ... Cooling air passage
(31) ・ ・ ・ ・ ・ ・ ・ ・ ・ Circulating fan
(33) ... Cooling fan
(4) ・ ・ ・ ・ ・ ・ ・ ・ ・ Motor
(44) ... Motor storage chamber

Claims (2)

A heating chamber is housed in the case body,
The heating cabinet is
A heating chamber having a door portion to be cooked and opening to the front surface of the case body;
A combustion chamber located below the heating chamber and provided with an oven burner for generating hot air;
A circulation fan that takes in the secondary air for combustion of the oven burner into a combustion chamber and circulates hot air generated in the combustion chamber by combustion of the oven burner into the heating chamber;
A motor that is housed in a motor housing chamber behind the heating chamber and that rotationally drives the circulation fan;
A cooling fan provided coaxially between the motor and the circulation fan and sending external cooling air into the motor housing chamber is disposed;
A cooking device in which a side space is provided in a range from one side or both sides of the heating chamber to the rear surface portion of the main body case,
The cooling air intake port that takes in external cooling air by rotating the cooling fan is provided on the front surface of the case body or the rear lower surface of the front surface,
A cooling air insertion passage extending from the cooling air intake port to the motor housing chamber is provided in the side space portion ,
A mechanism part comprising various devices is disposed in the side space part,
The operation panel unit for operating various devices of the mechanism unit is exposed in parallel with the door of the heating chamber on the front surface of the case body.
The cooling air intake port is a front surface portion of the case body, and is provided on the rear lower surface of the operation panel portion,
The cooling air insertion path is a cooking device provided below the mechanism portion and along the bottom surface of the case body . The heating cooker according to claim 1, wherein
A cooling air intake opening opens on the back of the motor housing chamber,
A first insertion hole communicating with the downstream end of the cooling air insertion passage and a second insertion hole corresponding to the cooling air intake port are formed in the rear surface portion of the case body,
A cooking device in which a cover portion for communicating the first and second insertion holes is provided on an outer surface of a rear surface portion of the case body.

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