JP6345148B2 - Cooker - Google Patents

Description

  The present invention relates to a cooking device, and more particularly to a cooking device that circulates hot air released from a heating means in a heating chamber to cook an object to be heated.

  2. Description of the Related Art Conventionally, there is known a heating cooker having an oven function in which hot air released from heating means such as a gas burner or an electric heater is circulated into a heating chamber by a circulation fan and cooks an object to be heated such as food. .

  This type of heating cooker is configured to circulate hot air at a high temperature of about 280 ° C. to 300 ° C. into the heating chamber so that the inside of the object to be heated is uniformly baked and the surface is also burnt. Therefore, there is a problem that hot air is always discharged from the exhaust port during operation. Therefore, in a conventional cooking device, a cooling passage is provided along the exhaust passage, and the temperature of the exhaust from the exhaust port is lowered by circulating the external air of the main body through the cooling passage by a cooling fan. (For example, see Patent Documents 1 and 2).

  Specifically, as shown in FIG. 8, the conventional cooking device 7 is divided into a main body case 71, which includes a heating chamber 70 that accommodates an object to be heated F and a combustion chamber 80 that disposes heating means 73. Separately provided. In addition, an exhaust passage 90 that guides hot air in the heating chamber 70, oily smoke discharged from the object to be heated F, and the like to the outside of the main body case 71 is provided in the upper part of the main body case 71. Further, a cooling passage 97 that allows external air to pass therethrough is provided in the main body case 71 along the exhaust passage 90.

  A circulation fan 74 that circulates hot air from the combustion chamber 80 into the heating chamber 70 and a cooling fan 76 that takes in external air from the main body case 71 into the motor housing chamber 95 are provided at the rear of the heating chamber 70 in the main body case 71. By operating the fan motor 75, the hot air released from the heating means 73 into the combustion chamber 80 is sent into the heating chamber 70 by the circulation fan 74, whereby the cooking of the article F to be heated is performed. Done. At the same time, the outside air of the main body case 71 is taken into the motor housing chamber 95 from the air supply port 950 by the cooling fan 76 and is conducted to the cooling passage 97 while recovering the heat of the fan motor 75. Further, the external air conducted to the cooling passage 97 is led out of the main body case 71 while recovering heat in the hot air led out from the heating chamber 70 to the exhaust passage 90. As a result, the fan motor 75 is cooled and the exhaust temperature is also lowered.

JP2013-213649A JP 2014-202382 A

  However, in the above-mentioned conventional cooking device 7, after collecting the heat of the fan motor 75 and the exhaust heat from the inside of the heating chamber 70, the heat is simply discharged to the outside of the main body and is not effectively used.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a heating cooker that circulates hot air released from a heating means in a heating cabinet to cook an object to be heated. By recovering heat and exhaust heat from the heating chamber and returning it to the combustion chamber, the preheating time of the heating chamber is shortened and the thermal efficiency is improved.

The present invention relates to a heating chamber that accommodates an object to be heated, a heating unit that generates hot air, a combustion chamber in which the heating unit is disposed, a circulation fan that circulates the hot air into the heating chamber, and a circulation fan that rotates. A fan motor, a motor housing chamber in which the fan motor is arranged, a cooling fan that takes external air from the main body into the motor housing chamber, an exhaust passage that guides hot air in the heating chamber to the outside of the main body, and an external portion that is taken into the motor housing chamber A cooling passage for conducting air along the constituent walls of the exhaust passage, and a return passage for guiding the external air sent into the cooling passage into the combustion chamber, and hot air generated by the heating means are brought into the heating chamber by a circulation fan. was circulated during the cooking operation for heating an object to be heated, the heating tone has a configuration supplied to the combustion chamber outside air taken into the motor housing chamber by the cooling fan through the return passage from the cooling passage It is a vessel.

In this case , during the cooking operation in which the hot air generated by the heating means is circulated in the heating chamber, the external air of the main body is taken into the motor housing chamber by the cooling fan, and the heat of the fan motor is recovered. Further, the external air taken into the motor housing chamber collects heat (exhaust heat) in the hot air led out from the heating chamber to the exhaust passage when passing through the cooling passage, and burns through the return passage. It is sent into the room. Thereby, the supply temperature to the combustion chamber can be made higher than that of the conventional cooking device.

The present invention also includes a heating chamber for storing an object to be heated, a heating means for generating hot air, a combustion chamber for arranging the heating means, a circulation fan for circulating the hot air in the heating chamber, and a circulation fan. A fan motor to be driven, a motor housing chamber in which the fan motor is arranged, a cooling fan that takes external air of the main body into the motor housing chamber, an exhaust passage that guides hot air in the heating chamber to the outside of the main body, and a motor housing chamber A cooling passage for conducting external air along the constituent wall of the exhaust passage and a return passage for guiding the external air sent into the cooling passage into the combustion chamber, the return passage along the constituent wall of the combustion chamber Ru cooker der disposed.

In this case, when the cooling fan is driven to rotate, the external air of the main body is taken into the motor housing chamber and the heat of the fan motor is recovered. Further, when circulating through the cooling passage, the heat (exhaust heat) in the hot air led out from the heating chamber to the exhaust passage is recovered. Further, the external air that has recovered the heat of the fan motor and the exhaust heat from the heating chamber as described above collects the heat released from the combustion chamber when flowing through the return passage, and is sent into the combustion chamber through the return passage. It is. Thereby, the temperature of the supply air into the combustion chamber can be further increased. In addition, direct transfer of heat from the combustion chamber to the bottom of the main body can be suppressed.

  In the heating cooker, preferably, the return passage has a downstream end connected to an air intake port of the combustion chamber.

  In this case, the external air led out from the cooling passage to the return passage is more actively introduced into the combustion chamber by the intake force of the circulation fan when the hot air in the combustion chamber is circulated into the heating chamber.

  As described above, according to the present invention, since the supply air temperature into the combustion chamber can be increased by the heat of the fan motor and the exhaust heat from the heating chamber, the preheating time of the heating chamber can be shortened accordingly. , Thermal efficiency is also improved.

FIG. 1 is a schematic side sectional view of a heating cooker according to an embodiment of the present invention. FIG. 2 is a schematic sectional view in plan view of the heating cooker according to the embodiment of the present invention. FIG. 3 is a rear schematic perspective view of the heating cooker according to the embodiment of the present invention. FIG. 4 is a schematic side cross-sectional view showing a first modification of the heating cooker according to the embodiment of the present invention. FIG. 5 is a schematic side sectional view showing a second modification of the heating cooker according to the embodiment of the present invention. FIG. 6 is a schematic cross-sectional view in plan view showing a third modification of the heating cooker according to the embodiment of the present invention. FIG. 7 is a schematic side cross-sectional view showing a fourth modification of the cooking device according to the embodiment of the present invention. FIG. 8 is a schematic configuration diagram of a conventional cooking device.

  Next, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings.

  As shown in FIG. 1, the heating cooker 1 according to the embodiment of the present invention is a built-in gas stove that is installed in a state where it is dropped into an attachment port K1 that is opened in a countertop K of a system kitchen, An oven function is provided for cooking the object to be heated F such as food by hot air circulated and supplied into the heating chamber 10. In addition, in this specification, the front part 111 of the main body case 11 is made into the front of the heating cooker 1, the depth direction of the main body case 11 when the heating cooker 1 is seen from the front side is the front-back direction, and the width direction is the left-right direction. The height direction is called the vertical direction.

  Inside the main body case 11, a heating chamber 10 that accommodates an object to be heated F and a combustion chamber 20 in which a burner 13 is disposed as a heating means are vertically separated. In addition, oil smoke and odor components released from the object to be heated F, combustion exhaust gas (hot air) of the burner 13 sent into the heating chamber 10 and the like are opened at the upper rear of the main body case 11 at the upper portion of the heating chamber 10. An exhaust passage 30 leading to the exhaust port 300 is provided. Furthermore, a hot air passage 31 that guides hot air in the heating chamber 10 and the combustion chamber 20 to a circulation fan case 34 described later is provided at the rear of the heating chamber 10.

  The heating chamber 10 includes a top wall 101 that constitutes an upper surface, a bottom wall 102 that constitutes a bottom surface, a left wall 103 that constitutes a left side surface, a right side wall (not shown) that constitutes a right side surface, and a rear surface. The front wall is formed in a box shape that opens to the front of the main body case 11. The opening 100 on the front surface of the heating chamber 10 is closed by a front door 12 provided on the front surface portion 111 of the main body case 11.

  A plurality of air for taking the combustion air of the burner 13 into the combustion chamber 20 at a position behind the front door 12 and near the lower end of the front surface portion (hereinafter referred to as “case front wall”) 111 of the main body case 11. An intake 200 is established. In addition, an air supply port 350 for taking outside air of the main body case 11 into a motor storage chamber 35 described later is provided in a rear surface portion (hereinafter referred to as “case rear wall”) 115.

  At the rear of the hot air passage 31 in the main body case 11, a circulation fan 14 that circulates the hot air discharged from the burner 13 into the combustion chamber 20 and the hot air sent into the heating chamber 10 into the heating chamber 10, and the main body case 11 is provided with a cooling fan 16 that takes the external air 11 into the motor housing chamber 35 as cooling air for the fan motor 15. The circulation fan 14 and the cooling fan 16 are coaxially connected and fixed to the drive shaft of the fan motor 15. By operating the fan motor 15, both the fans 14 and 16 are driven to rotate simultaneously.

  The hot air passage 31 is provided in the upper part of the combustion chamber 20 and between the heating chamber 10 and the circulation fan case 34 that accommodates the circulation fan 14, and through the hot air outlet 21 opened in the upper part of the combustion chamber 20. While connected to the inside 20, it is connected to the internal space of the circulation fan case 34 through the suction port 22 opened in the front part of the circulation fan case 34.

  A hot air outlet hole 23 connected to a blower outlet (not shown) of the circulation fan case 34 is formed at a position near the left and right sides of the rear wall 105 of the heating chamber 10. Further, a hot air suction hole 24 connected to the hot air passage 31 is formed at a substantially central position of the back wall 105 of the heating chamber 10. Accordingly, when the fan motor 15 is operated, the hot air discharged from the burner 13 into the combustion chamber 20 is led out from the hot air outlet 21 to the hot air passage 31 by the circulation fan 14 and then taken into the circulation fan case 34 to generate hot air. It is sent out from the blowout hole 23 into the heating chamber 10. Further, a part of the hot air sent into the heating chamber 10 is led out from the hot air suction hole 24 to the hot air passage 31 and then taken into the circulation fan case 34 and sent out again from the hot air blowing hole 23 into the heating chamber 10. Is done.

  An exhaust outlet hole 25 connected to the exhaust passage 30 is opened at a position near the rear of the upper wall 101 of the heating chamber 10. The exhaust passage 30 extends rearward from the exhaust outlet hole 25 through the upper portion of the motor housing chamber 35, and further, the rear end portion extends upward toward the exhaust port 300. Therefore, a part of the hot air sent into the heating chamber 10 by the circulation fan 14 is guided from the exhaust outlet hole 25 to the exhaust port 300 through the exhaust passage 30 and discharged to the outside of the main body case 11.

  The motor housing chamber 35 is connected to the internal space of the cooling fan case 36 that houses the cooling fan 16 through a shaft insertion hole 26 that is opened around the drive shaft of the fan motor 15. Therefore, when the fan motor 15 is operated, the external air of the main body case 11 is taken into the motor housing chamber 35 from the air supply port 350 by the cooling fan 16 and the heat released from the fan motor 15 is recovered, and then the shaft It is guided into the cooling fan case 36 through the insertion hole 26.

  A cooling passage 37 is formed in the upper part of the cooling fan case 36 to allow the external air taken into the motor housing chamber 35 to be conducted along the exhaust passage 30. As shown in FIGS. 1 and 2, the cooling passage 37 extends rearward from the upper portion of the cooling fan case 36 along the bottom wall 302 of the exhaust passage 30 and further extends toward the left side. Further, the rear end portion of the cooling passage 37 extends rearward to the rear of the main body case 11 and is connected to a return passage 38 that guides external air introduced into the cooling passage 37 into the combustion chamber 20. Accordingly, the external air introduced from the motor housing chamber 35 into the cooling fan case 36 passes through the cooling passage 37 and recovers heat (exhaust heat) conducted to the bottom wall 302 from the hot air flowing through the exhaust passage 30. To the return passage 38.

  As shown in FIGS. 1 to 3, the return passage 38 extends downward from the rear end portion of the cooling passage 37, and further extends to the right outside the case rear wall 115 through the upper portion of the air supply port 350. A first passage 41 extending to the right side of the air supply port 350, and extending rightward from the right end portion of the first passage 41 along the outer surface of the case rear wall 115, the right end portion being the case rear wall. 115, a second passage 42 connected to the communication hole 27, a third passage 43 extending downward from the communication hole 27 along the inner surface of the case rear wall 115, and a lower end of the third passage 43. A fourth passage 44 extending forward from the bottom along the bottom surface portion (hereinafter referred to as “case bottom wall”) 112 of the main body case 11, and from the front end of the fourth passage 44 to the lower front surface of the case front wall 111. And a fifth passage 45 that extends to the left and is connected to the air intake port 200. It is.

  As shown in FIG. 2, the third passage 43 is provided on the right side of the heating chamber 10, and is provided in the back of a control chamber 39 that accommodates a gas valve, a control circuit, and the like (not shown). It is provided at the bottom of the control chamber 39. As shown in FIG. 1, the fifth passage 45 is separated from the external space of the main body case 11 by a front end plate 116 erected and formed at the front end of the case bottom wall 112, and is used for burning the burner 13. Almost all of the secondary air is supplied into the combustion chamber 20 through the return passage 38. That is, when the fan motor 15 is operated, the external air introduced into the cooling passage 37 through the air supply port 350 is guided to the inner part of the control chamber 39 from the communication hole 27 through the outside of the case rear wall 115. Further, the air is guided forward along the bottom of the control chamber 39 and is sent from the air intake port 200 into the combustion chamber 20 as secondary air for combustion of the burner 13.

  As described above, according to the heating cooker 1, after the external air of the main body case 11 is taken into the motor housing chamber 35 from the air supply port 350 by the cooling fan 16 during operation and the heat of the fan motor 15 is recovered. Since the cooling fan 37 is led out to the cooling passage 37, the fan motor 15 can be prevented from being overheated. Further, the external air led out to the cooling passage 37 collects exhaust heat from the exhaust passage 30 while flowing through the cooling passage 37 and is led out to the return passage 38. Thereby, the exhaust temperature from the exhaust port 300 can be lowered.

  Moreover, the external air led out to the return passage 38, that is, the external air that has recovered the heat of the fan motor 15 and the exhaust heat from the inside of the heating chamber 10 is guided to the air intake port 200 through the return passage 38. Since it is supplied into the combustion chamber 20, the supply air temperature to the combustion chamber 20 becomes higher than that of the conventional cooking device. Therefore, the preheating time required to raise the temperature in the heating chamber 10 to the set temperature in the oven heating cooking can be shortened, and the combustion efficiency of the burner 13 is also improved.

  In this case, since the downstream end of the return passage 38 is directly connected to the air intake port 200, the cooling air is cooled by the intake force of the circulation fan 14 when the hot air in the combustion chamber 20 is circulated in the heating chamber 10. External air led out from the passage 37 to the return passage 38 is more actively taken into the combustion chamber 20. That is, the external air that has recovered the heat of the fan motor 15 and the heat in the hot air is positively introduced into the combustion chamber 20 by the synergistic effect of the exhaust force of the cooling fan 16 and the intake force of the circulation fan 14. Therefore, the preheating time can be further shortened accordingly, and the combustion efficiency of the burner 13 is further improved. Further, overheating of the fan motor 15 can be prevented more reliably, and the exhaust temperature can be more reliably lowered.

  In the above embodiment, the cooling passage 37 extends from the upper portion of the cooling fan case 36 to the outside of the case rear wall 115 along the bottom wall 302 of the exhaust passage 30, while the first of the return passage 38. The passage 41 has been described as being connected to the second passage 42 from the rear end portion of the cooling passage 37 through the outside of the case rear wall 115. However, like the heating cooker 1A shown in FIG. 37 extends from the upper part of the cooling fan case 36 to the vicinity of the upper end of the exhaust passage 30 along the bottom wall 302 and the rear wall 305 of the exhaust passage 30, while the first passage 41 of the return passage 38 is a cooling passage. 37 may extend downward from the upper right side of the main body case 11 through the inside of the main body case 11 and be connected to the second passage 42 outside the case rear wall 115.

  In this case, the external air led out from the cooling fan case 36 to the cooling passage 37 recovers the heat conducted to the bottom wall 302 and the rear wall 305 from the hot air flowing in the exhaust passage 30 and then returns to the return passage 38. Derived. That is, more exhaust heat from the inside of the heating chamber 10 is recovered and led to the return passage 38. Therefore, the supply air temperature into the combustion chamber 20 becomes higher. Therefore, the preheating time can be further shortened accordingly, and the combustion efficiency of the burner 13 is further improved.

  Moreover, in the said embodiment, although the return channel | path 38 demonstrated what the 4th channel | path 44 was arrange | positioned at the bottom part of the control chamber 39, like the heating cooker 1B shown in FIG. 44 may be disposed along the bottom wall 202 of the combustion chamber 20, that is, in the gap between the bottom wall 202 of the combustion chamber 20 and the case bottom wall 112, or the heating cooker 1C shown in FIG. As described above, the fourth passage 44 may be disposed along the side wall 203 of the combustion chamber 20.

  In this case, when the external air that has recovered the heat of the fan motor 15 and the exhaust heat from the inside of the heating chamber 10 flows through the fourth passage 44 of the return passage 38, the hot air in the combustion chamber 20 is used as the bottom wall 202 or the side wall. Since the heat transmitted to 203 is recovered and sent into the combustion chamber 20 through the return passage 38, the supply air temperature into the combustion chamber 20 is further increased. Therefore, the preheating time can be further shortened accordingly, and the combustion efficiency of the burner 13 is further improved.

  Particularly in the case where the fourth passage 44 is disposed in the gap between the bottom wall 202 of the combustion chamber 20 and the case bottom wall 112 as in the heating cooker 1B shown in FIG. Since it is difficult for heat to be transmitted directly to the heater, problems such as overheating of articles stored in the space below the heating cooker 1B and discomfort when the user touches the case bottom wall 112 can be prevented.

  In the above embodiment, the fifth passage 45 is separated from the external space of the main body case 11 by the front end plate 116 of the case bottom wall 112, that is, the downstream end of the return passage 38 is directly connected to the air intake port 200. However, as in the cooking device 1D shown in FIG. 7, the downstream end of the return passage 38 communicates with the air intake port 200 and the vent hole 28 formed in the case bottom wall 112. The external air that has recovered the heat of the fan motor 15 and the exhaust heat from the inside of the heating chamber 10 during operation, together with the external air introduced into the fifth passage 45 from the vent hole 28, enters the combustion chamber 20. It may be configured to be introduced.

  In this case, even if the air supply port 350, the cooling passage 37, and the return passage 38 are closed during operation due to clogging of dust, combustion air can be supplied from the vent hole 28 to the burner 13. Combustion failure of the burner 13 due to insufficient supply amount can be prevented.

  Although the present invention has been described with respect to the heating cooker in which the burner 13 is incorporated in the combustion chamber 20 as the heating means of the article to be heated F, the present invention can be applied to an apparatus in which an electric heater is incorporated in place of the burner 13.

DESCRIPTION OF SYMBOLS 1 Heating cooker 10 Heating chamber 11 Main body case 13 Burner (heating means)
14 Circulating fan 15 Fan motor 16 Cooling fan 20 Combustion chamber 30 Exhaust passage 302 Bottom wall (component wall) of the exhaust passage
35 Motor housing chamber 37 Cooling passage 38 Return passage F Object to be heated

Claims (3)

A heating cabinet for storing an object to be heated;
Heating means for generating hot air;
A combustion chamber with heating means;
A circulation fan for circulating the hot air into a heating chamber;
A fan motor that rotationally drives the circulation fan;
A motor housing room for the fan motor;
A cooling fan that takes external air of the main body into the motor housing chamber;
An exhaust passage for guiding the hot air in the heating chamber to the outside of the main body,
A cooling passage for conducting external air taken into the motor housing chamber along the constituent wall of the exhaust passage;
A return passage for guiding the external air sent into the cooling passage into the combustion chamber ,
During the cooking operation in which hot air generated by the heating means is circulated in the heating chamber by a circulation fan to heat the object to be heated, the combustion air is supplied from the cooling passage through the return passage to the external air taken into the motor housing chamber by the cooling fan. A heating cooker configured to supply to A heating cabinet for storing an object to be heated;
Heating means for generating hot air;
A combustion chamber with heating means;
A circulation fan for circulating the hot air into a heating chamber;
A fan motor that rotationally drives the circulation fan;
A motor housing room for the fan motor;
A cooling fan that takes external air of the main body into the motor housing chamber;
An exhaust passage for guiding the hot air in the heating chamber to the outside of the main body,
A cooling passage for conducting external air taken into the motor housing chamber along the constituent wall of the exhaust passage;
A return passage for guiding the external air sent into the cooling passage into the combustion chamber ,
The return cooker is a heating cooker disposed along a constituent wall of the combustion chamber. The heating cooker according to claim 1 or 2,
The return path is a heating cooker whose downstream end is connected to an air intake port of the combustion chamber.

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