KR20110082805A - Convection type microwave oven and control method thereof - Google Patents

Convection type microwave oven and control method thereof Download PDF

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Publication number
KR20110082805A
KR20110082805A KR1020100002698A KR20100002698A KR20110082805A KR 20110082805 A KR20110082805 A KR 20110082805A KR 1020100002698 A KR1020100002698 A KR 1020100002698A KR 20100002698 A KR20100002698 A KR 20100002698A KR 20110082805 A KR20110082805 A KR 20110082805A
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KR
South Korea
Prior art keywords
cooking chamber
hot air
port
circulation
duct
Prior art date
Application number
KR1020100002698A
Other languages
Korean (ko)
Inventor
신승진
Original Assignee
주식회사 대우일렉트로닉스
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Application filed by 주식회사 대우일렉트로닉스 filed Critical 주식회사 대우일렉트로닉스
Priority to KR1020100002698A priority Critical patent/KR20110082805A/en
Publication of KR20110082805A publication Critical patent/KR20110082805A/en

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/642—Cooling of the microwave components and related air circulation systems
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/647—Aspects related to microwave heating combined with other heating techniques
    • H05B6/6473—Aspects related to microwave heating combined with other heating techniques combined with convection heating

Abstract

PURPOSE: A convection type microwave oven and a control method thereof are provided to improve heat transfer efficiency by increasing the contact time between hot air and food and to shorten the cooling hour of a cooking chamber after finishing cooking. CONSTITUTION: A convection type microwave oven(1) comprises: a case(10) installed to the inside of a cabinet to form a cooking chamber(50) and provided with an intake port, an exhaust port(12) and a circulation port(14); a convection heating unit installed adjacently to the case and supplying hot air to the inside of the cooking chamber through the intake port; a duct unit(20) circulating a portion of hot air discharged from the exhaust port into the inside of the cooking chamber and guiding the remnant to the outside through a discharge port; and a circulating fan(40) installed to the inside of the duct unit to oppose the circulation port.

Description

Convection Microwave and its Control Method {CONVECTION TYPE MICROWAVE OVEN AND CONTROL METHOD THEREOF}

The present invention relates to a microwave oven, and more particularly, to a convection microwave oven in which high temperature hot air discharged from a cooking chamber is circulated back to the cooking chamber to reduce heat loss, and the hot air is quickly discharged upon completion of cooking.

In general, a microwave oven is a device that cooks food by heating food while microwaves are generated from a magnetron installed in an electric room.

Recently, in order to perform a variety of cooking operations, a heating wire for performing an oven function and a convection heating unit for supplying hot air to a cooking chamber are installed.

The convection heating unit of the microwave oven according to the prior art includes a heater installed on the outer wall of the cooking chamber, and a blowing fan installed on the rear of the heater so that hot air generated through the heater is supplied into the cooking chamber.

In the cooking chamber in which the convection heating unit is installed, an inlet for introducing hot air and an exhaust port for discharging the hot air are formed.

The intake port is mainly formed on the rear surface of the cooking chamber, and the exhaust port is formed on the side of the cooking chamber so that hot air flowing from the rear surface is transferred to the side while being in contact with food and then moved to the side to be discharged to the outside of the cooking chamber.

The above technical configuration is a background art for helping understanding of the present invention, and does not mean a conventional technology well known in the art.

The convection microwave oven according to the prior art has a problem that it is difficult to improve the heat transfer efficiency of the hot air supplied by the convection heating unit because heat can be transferred to the food only while the hot air flowing through the intake port is moved to the exhaust port.

In addition, the time that the hot air in the cooking chamber is discharged to the outside after the cooking is completed, there is a problem that the time to perform another cooking is delayed. Therefore, there is a need for improvement.

The present invention has been made by the necessity as described above, and improves the heat transfer efficiency by increasing the contact time between hot air and food, while providing a convection microwave oven that can shorten the cooling time of the cooking chamber when the cooking is completed. There is a purpose.

The convection microwave oven according to the present invention includes: a case installed inside the cabinet to form a cooking chamber, a case having an inlet, an exhaust port, and a circulation port, and a convection heating unit installed in contact with the case and supplying hot air into the cooking chamber through the inlet. And a duct part for guiding the hot air discharged from the exhaust port to the outside through the inside of the cooking chamber and the discharge port, and a circulation fan installed in the duct part to face the circulation port.

In addition, the duct unit preferably includes a connection duct extending from the exhaust port to the circulation port side and a discharge duct installed in the direction toward the discharge port from the connection duct.

In addition, the exhaust duct is preferably wider cross-sectional area from the circulation port toward the discharge port.

In addition, the circulation fan preferably rotates forward or reverse by a control signal.

In addition, the exhaust port is provided on the rear upper side of the case side, the circulation port is preferably installed on the front lower side of the case side.

The control method of the convection microwave oven according to the present invention includes: a heating step in which the convection heating unit is operated to supply hot air to the cooking chamber, and the hot air discharged from the cooking chamber is moved along the duct part and then reintroduced into the cooking chamber through the circulation port. And a circulation step, a confirmation step of confirming whether cooking in the cooking chamber is completed, and a discharge step of discharging hot air in the cooking chamber through the exhaust port and the circulation port when cooking of the cooking chamber is completed.

In addition, the circulation step is preferably supplied with hot air from the duct to the cooking chamber by the forward rotation of the circulation fan installed to face the circulation port.

In addition, in the discharge step, it is preferable that hot air is discharged from the cooking chamber to the duct by reverse rotation of the circulation fan installed to face the circulation port.

The convection microwave oven according to the present invention is provided with a duct unit for heat transfer to the food and circulating the discharged hot air back to the cooking chamber, thereby reducing the heat loss of the convection heating unit, shortening the cooking time, the temperature inside the cooking chamber above the set temperature The separate heater for maintaining can be omitted, thereby reducing the cost.

In addition, after the cooking of the cooking chamber is completed, the hot air is discharged from the cooking chamber to the duct part by the reverse rotation of the circulation fan to shorten the cooling time of the cooking chamber, thereby improving workability of cooking.

1 is a perspective view showing a duct unit mounting structure of the convection microwave oven according to an embodiment of the present invention.
2 is a side cross-sectional view showing a convection microwave oven according to an embodiment of the present invention.
Figure 3 is a side cross-sectional view showing the flow of air in the circulation step of the convection microwave oven according to an embodiment of the present invention.
Figure 4 is a side cross-sectional view showing the flow of air in the discharge step of the convection microwave oven according to an embodiment of the present invention.
5 is a flowchart illustrating a control method of a convection microwave oven according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of a convection microwave oven according to the present invention. For convenience of explanation, a home convection microwave oven will be described as an example.

In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description.

In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator.

Therefore, definitions of these terms should be made based on the contents throughout the specification.

1 is a perspective view showing a duct unit mounting structure of the convection microwave oven according to an embodiment of the present invention, Figure 2 is a side sectional view showing a convection microwave oven according to an embodiment of the present invention, Figure 3 4 is a side cross-sectional view showing the flow of air in the circulation step of the convection microwave oven according to an embodiment of the present invention, Figure 4 is a side cross-sectional view showing the flow of air in the discharge step of the convection microwave oven according to an embodiment of the present invention 5 is a flowchart illustrating a control method of a convection microwave oven according to an exemplary embodiment of the present invention.

1 to 3, the convection microwave oven 1 according to an embodiment of the present invention is installed inside the cabinet 5 to form a cooking chamber 50, and has an intake port 16 and an exhaust port ( 12 and a case 10 having a circulation port 14, a convection heating unit 30 installed in contact with the case 10 and supplying hot air into the cooking chamber 50 through the inlet 16, and an exhaust port. A portion of the hot air discharged from the (12) is circulated to the inside of the cooking chamber 50, and the remainder of the duct portion 20 is opposed to the duct portion 20 and the circulation port 14 to guide the outside through the discharge port 18 It is provided with a circulation fan 40 installed inside.

A cabinet 5 is installed outside the convection microwave oven 1 to form an appearance, and a case 10 is installed inside the cabinet 5 to form a cooking chamber 50.

The case 10 has an inlet 16 forming a passage through which the hot air heated by the convection heating unit 30 flows into the cooking chamber 50, and a passage through which the hot air heating the cooking chamber 50 exits the duct unit 20. Phosphorous exhaust port 12 is provided.

The convection heating unit 30 that supplies hot air to the cooking chamber 50 includes a heater 32 that is heated by electricity supply and a blower fan 34 that blows air heated by the heater 32.

The hot air discharged to the outside of the case 10 through the exhaust port 12 is moved along the duct 20, and a portion of the hot air is passed through the circulation port 14 provided in the case 10 to the cooking chamber 50. It is resupplied to the inside of. As a result, the temperature inside the cooking chamber 50 can be maintained above a predetermined temperature with little power consumption, and the operation efficiency of the convection heating unit 30 is also improved.

On the other hand, the discharge port 18 for discharging the hot air moved along the duct portion 20 is provided on the lower side and sidewalls of the cabinet (5).

The duct part 20 may be formed in various shapes within the technical concept of connecting the exhaust port 12, the circulation port 14, and the discharge port 18 to form a passage through which hot air is moved.

According to one embodiment, the duct part 20 includes a connection duct 22 extending from the exhaust port 12 toward the circulation port 14 and an exhaust duct installed in the direction toward the discharge port 18 from the connection duct 22. 24).

The exhaust port 12 connected to the duct part 20 is installed at the rear upper side of the case 10 side, and the circulation port 14 is installed at the front lower side of the case 10 side.

Since the exhaust port 12 is installed at the rear upper side of the side of the case 10, which is a space where the hot air stays in the cooking chamber 50, the hot air that has heated the cooking chamber 50 passes through the exhaust port 12. Is moved to).

In addition, since the circulation port 14 is provided at the front lower side at the side of the cooking chamber 50 where hot air is hard to be supplied from the cooking chamber 50, and hot air wind is supplied again, the inside of the cooking chamber 50 is uniformly heated.

In addition, the duct part 20 is provided with a circulation fan 40 facing the circulation port 14, the circulation fan 40 is rotated in the forward direction to circulate the hot air moved downward along the duct part 20 Since the air is blown toward the mouth 14 side, circulation of the hot air is facilitated.

The connection duct 22 of the duct portion 20 has a narrower cross-sectional area than the discharge duct 24 to prevent the temperature of the hot air from decreasing, and the discharge duct 24 is directed from the circulation port 14 to the discharge port 18. Since the cross-sectional area is wider toward the lower the temperature of the hot air discharged.

Since the temperature of the hot air discharged through the discharge port 18 is gradually lowered by an increase in the area where heat exchange is made, it is possible to prevent a safety accident due to the hot air discharged.

As shown in FIG. 3, the circulation fan 40 installed inside the duct part 20 facing the circulation port 14 rotates the air of the duct part 20 to the cooking chamber 50 while rotating forward by a control signal. 4, or reverse rotation as shown in FIG. 4 to exhaust the hot air from the cooking chamber 50 to the duct unit 20.

Hereinafter, with reference to the accompanying drawings will be described in detail the operating state of the convection microwave oven 1 according to an embodiment of the present invention.

1 to 5, the control method of the convection microwave oven 1 according to an embodiment of the present invention, the heating step in which the convection heating unit 30 is operated to supply hot air to the cooking chamber 50 (S10)

When the cooking operation is started, the power is applied to the heater 32 and the blowing fan 34 is driven, the hot air is supplied into the cooking chamber 50 through the inlet 16, the cooking operation proceeds.

Hot air discharged from the cooking chamber 50 has a circulation step that is moved along the duct 20 to the discharge port 18 and then re-introduced into the cooking chamber 50 through the circulation port 14 (S20).

Hot air that has been cooked in contact with food is discharged to the outside of the cooking chamber 50 through the exhaust port 12, and moves downward along the duct part 20 to the outside of the cabinet 5 through the discharge port 18. Exhausted.

At this time, a portion of the hot air moved downward along the duct portion 20 is circulated into the cooking chamber 50 through the circulation port 14, the circulation fan 40 which is installed to face the circulation port 14 In the forward rotation of the duct portion 20, the hot air is more smoothly supplied to the cooking chamber 50, a greater amount.

Since the hot air circulated into the cooking chamber 50 flows into the front lower side of the cooking chamber 50, the interior of the cooking chamber 50 is evenly heated to improve the efficiency of the convection heating unit 30.

In addition, the hot air moved downward along the duct part 20 is initially supplied into the connection duct 22 having a small cross-sectional area into the duct part 20, so that the contact area between the hot air and the duct part 20 is increased. Since this is small, heat loss is suppressed.

Afterwards, when the hot air moves through the discharge duct 24 while moving downward, the contact area between the hot air and the discharge duct 24 increases, so that the temperature of the hot air discharged through the discharge port 18 is lowered.

Therefore, it is possible to prevent a safety accident caused by the hot air discharged through the discharge port 18, and the exhaust area is widened by the discharge duct 24, so that the discharge of hot air moved along the duct portion 20 more smoothly. It is done.

After the circulation step has a confirmation step of confirming whether cooking in the cooking chamber 50 is complete (S30).

The cooking temperature may be checked by the passage of the temperature in the cooking chamber 50 and the set time, and in addition, the cooking may be confirmed by various methods.

When cooking of the cooking chamber 50 is completed, a discharge step of discharging hot air in the cooking chamber 50 through the exhaust port 12 and the circulation port 14 is provided.

The hot air of the cooking chamber 50 is discharged through the exhaust port 12, and the hot air is discharged from the cooking chamber 50 to the duct part 20 by reverse rotation of the circulation fan 40 installed to face the circulation port 14. .

The hot air discharged through the exhaust port 12 and the hot air discharged through the circulation port 14 are discharged along the duct part 20.

Since the hot air in the cooking chamber 50 is sucked into the duct part 20 through the circulation port 14 by the reverse rotation of the circulation fan 40, the discharge time of the hot air of the cooking chamber 50 can be shortened.

According to the configuration as described above, the convection microwave oven 1 according to the embodiment is provided with a convection heating unit 30 because the duct portion 20 for heat transfer to the food and circulate the discharged hot air back to the cooking chamber 50 is installed The cooking time can be shortened by reducing the heat loss, and a separate heater 32 for maintaining the temperature inside the cooking chamber 50 above the set temperature can be omitted, thereby reducing the cost.

After the cooking of the cooking chamber 50 is completed, the hot air is discharged from the cooking chamber 50 to the duct part 20 by the reverse rotation of the circulation fan 40, thereby shortening the cooling time of the cooking chamber 50, and thus the workability of cooking. Can improve.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art to which the art belongs can make various modifications and other equivalent embodiments therefrom. I will understand.

In addition, the home convection microwave oven has been described as an example, but this is merely illustrative, and the convection microwave oven of the present invention may be used in a microwave oven used in various fields such as industrial or commercial use in addition to home.

Therefore, the true technical protection scope of the present invention will be defined by the claims.

1: Convection Microwave
5: cabinet 10: case
12: exhaust port 14: circulation port
18: outlet 20: duct section
22: connection duct 24: discharge duct
30: convection heating part 40: circulation fan
50: cooking chamber

Claims (8)

A case installed inside the cabinet to form a cooking chamber and having an inlet, an exhaust port, and a circulation port;
A convection heating unit installed in contact with the case and supplying hot air into the cooking chamber through the inlet;
A duct unit guiding hot air discharged from the exhaust port to the outside through the cooking chamber and the discharge port; And
Convection microwave oven, characterized in that it comprises a circulation fan installed in the duct portion facing the circulation port.
The method of claim 1, wherein the duct portion,
A connection duct extending from the exhaust port toward the circulation port; And
Convection microwave oven characterized in that it comprises an exhaust duct installed in the direction toward the outlet from the connection duct.
The method of claim 2,
The exhaust duct is a convection microwave oven, characterized in that the cross-sectional area is wider in the direction from the circulation port toward the discharge port.
The method of claim 1,
The circulation fan is a convection microwave oven, characterized in that the forward or reverse rotation is made by a control signal.
The method according to any one of claims 1 to 4,
The exhaust port is installed on the rear upper side of the case side,
The circulation port is a convection microwave oven, characterized in that installed in the front lower side of the case side.
A heating step of supplying hot air to the cooking chamber by operating the convection heating unit;
A circulation step in which hot air discharged from the cooking chamber is moved along the duct part and then re-introduced into the cooking chamber through a circulation hole;
A confirmation step of confirming whether cooking in the cooking chamber is completed; And
And when the cooking of the cooking chamber is completed, discharging the hot air in the cooking chamber through the exhaust port and the circulation port.
The method according to claim 6,
The circulation step is a control method of a convection microwave oven, characterized in that the hot air is supplied from the duct to the cooking chamber by the forward rotation of the circulation fan installed to face the circulation port.
The method according to claim 6,
The discharging step is a control method of a convection microwave oven, characterized in that the hot air is discharged from the cooking chamber to the duct part by the reverse rotation of the circulation fan installed to face the circulation port.
KR1020100002698A 2010-01-12 2010-01-12 Convection type microwave oven and control method thereof KR20110082805A (en)

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Application Number Priority Date Filing Date Title
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KR20110082805A true KR20110082805A (en) 2011-07-20

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104138219A (en) * 2013-04-30 2014-11-12 东部大宇电子株式会社 Cooking apparatus
CN104138225A (en) * 2013-04-30 2014-11-12 东部大宇电子株式会社 Cooking apparatus
CN104138224A (en) * 2013-04-30 2014-11-12 东部大宇电子株式会社 Cooking apparatus
CN104141971A (en) * 2013-04-30 2014-11-12 东部大宇电子株式会社 Cooking apparatus
EP2799782A3 (en) * 2013-04-30 2016-01-06 Dongbu Daewoo Electronics Corporation Cooking apparatus
CN110500621A (en) * 2014-09-02 2019-11-26 三星电子株式会社 Cooking equipment

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104138219A (en) * 2013-04-30 2014-11-12 东部大宇电子株式会社 Cooking apparatus
CN104138225A (en) * 2013-04-30 2014-11-12 东部大宇电子株式会社 Cooking apparatus
CN104138224A (en) * 2013-04-30 2014-11-12 东部大宇电子株式会社 Cooking apparatus
CN104141971A (en) * 2013-04-30 2014-11-12 东部大宇电子株式会社 Cooking apparatus
EP2799777A3 (en) * 2013-04-30 2015-12-30 Dongbu Daewoo Electronics Corporation Cooking apparatus
EP2799782A3 (en) * 2013-04-30 2016-01-06 Dongbu Daewoo Electronics Corporation Cooking apparatus
EP2799778A3 (en) * 2013-04-30 2016-01-06 Dongbu Daewoo Electronics Corporation Cooking apparatus
EP2799781A3 (en) * 2013-04-30 2016-01-06 Dongbu Daewoo Electronics Corporation Cooking apparatus
CN104141971B (en) * 2013-04-30 2017-06-09 东部大宇电子株式会社 Cooking equipment
CN110500621A (en) * 2014-09-02 2019-11-26 三星电子株式会社 Cooking equipment

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