JP2006226537A - Heating cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow a user to surely see the inside of a heating chamber 1 through a door 2 even during cooking by preventing dew condensation on the door. <P>SOLUTION: The door 2 of this heating cooker is constituted by sticking two sheets of transparent bases 2a, 2b. An air supply portion 4 is formed by supplying the air to a clearance 2d between the transparent bases 2a, 2b. The air supply portion 4 is composed of an air blower 11 and a duct 12. The duct 12 is mounted on, for example, an upper portion of the heating chamber 1. When the superheated steam is supplied to the heating chamber 1 by a heating medium supply portion 3 to heat and cook a cooked object 5, the air in the duct 12 is heated by exhaust heat from the heating chamber 1, and supplied inside of the door 2 by the air blower 11. Thus the temperature difference between the inside of the door 2 and the heating chamber 1 is reduced, and the dew condensation on the door 2 can be inhibited. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a cooking device that performs cooking of an object to be cooked.

  2. Description of the Related Art A heating cooker that performs cooking of food to be cooked such as food with superheated steam of 100 ° C. or higher obtained by further heating saturated steam is well known (see, for example, Patent Document 1). In this type of cooker, saturated steam is generated with water supplied from a water supply tank or the like in a saturated steam generator, and this saturated steam is further heated with a superheated steam generator to generate superheated steam. To do. When this superheated steam is supplied into the heating chamber containing the food to be cooked and cooking is performed, and the heating time suitable for the food to be cooked has elapsed, the supply of the superheated steam is stopped and cooking is completed.

By using such superheated steam, it is possible to prevent moisture from evaporating in the material to be cooked and cook with a moist finish. Moreover, since superheated steam has a higher thermal conductivity than air, cooking time can be shortened. Furthermore, since the heating chamber becomes nearly oxygen-free due to the supply of superheated steam, oxidation of the object to be cooked can be reduced.
JP-A-9-4849

  However, in the heating cooker described above, a large amount of moisture (water vapor) is supplied into the heating chamber, so that the temperature in the heating chamber during cooking is from 150 ° C. or lower, and condensation occurs on the door that is difficult to heat, The door is cloudy. The door is transparent so that the user can see the heating chamber even during cooking. However, if the door becomes cloudy due to condensation and the heating chamber is not visible, the function of the door cannot be performed. When the door has a structure that is particularly difficult to be heated, there arises a problem that the door is fogged due to condensation even when the temperature is higher than the above temperature.

  Such a problem can occur in the same manner even when a large amount of water evaporates from the cooking object due to the heating of the cooking object. Therefore, the above problem can occur not only when superheated steam is used as the heating medium of the object to be cooked but also when, for example, hot air is used.

  The present invention has been made in order to solve the above-described problems, and its purpose is to reduce the condensation in the door and to allow the user to reliably see the heating chamber through the door even during cooking. Is to provide a vessel.

  The heating cooker according to the present invention includes a heating chamber in which an object to be cooked is stored, a door that opens and closes when the object to be cooked is taken in and out of the heating chamber, and a heating medium supply unit that supplies the heating medium to the heating chamber. A heating cooker for cooking the cooking object in the heating chamber with the heating medium, wherein the door has at least two transparent substrates disposed to face each other with a gap between them. Air supply means for supplying air to the gap is further provided, and the air supply means is heated by exhaust heat generated during at least one of the heating chamber and the heating medium supply means (during cooking of the cooking object). The air is supplied to the gap of the door.

  According to said structure, a heating medium (for example, superheated steam and hot air) is supplied in a heating chamber by a heating medium supply means, and the to-be-cooked item in a heating chamber is cooked. Said to-be-cooked object can be taken in and out with respect to a heating chamber by opening and closing a door. The door is configured by arranging at least two transparent substrates to face each other through a gap.

  Here, air heated by exhaust heat generated in at least one of the heating chamber and the heating medium supply means is supplied to the gap of the door by the air supply means, and such air is supplied to the gap. Compared with the case where it is not performed, the temperature difference between the heating chamber and the inside of the door during cooking is reduced. Thereby, it can suppress that dew condensation arises in a door resulting from the said temperature difference, and can suppress that a door fogs. As a result, even during cooking, the user can reliably see the heating chamber through the door.

  The heating medium supply unit may generate superheated steam as the heating medium and supply it to the heating chamber. In particular, when cooking an object to be cooked with superheated steam, condensation is likely to occur at the door due to the presence of a large amount of moisture (water vapor) in the heating chamber. However, even when cooking an object to be cooked using superheated steam, by supplying the air heated by the exhaust heat to the gap of the door, there is a temperature difference between the heating chamber and the inside of the door during cooking. It remains the same. As a result, the above-described effects of the present invention can be obtained even when superheated steam is used as the heating medium of the object to be cooked and condensation easily occurs on the door.

  The air supply means supplies air to the gap between the outside and the inside of the cooker, and air that is taken in from the outside of the cooker by the blower means. The structure provided with the duct for doing. In this configuration, for example, if the duct is arranged in the vicinity of at least one of the heating chamber and the heating medium supply means, the air inside the duct taken in from the outside by the blower means is generated in the heating chamber or the heating medium supply means. It becomes easy to supply to the said gap | interval of the said door, after heating by the exhaust heat to do. Therefore, the effects of the present invention described above can be obtained with a simple configuration using the air blowing means and the duct.

  At this time, it is desirable that the duct be provided above the heating chamber. Since the heating atmosphere has a property of accumulating upward, by providing the duct above the heating chamber, the air inside the duct can be efficiently heated by the exhaust heat of the heating chamber.

  In addition, the cooking device of the present invention further includes a control unit that controls driving of the blowing unit, and the control unit preferably stops driving the blowing unit when cooking of the object to be cooked is completed. In this case, when the user opens the door after the cooking of the food to be cooked and takes out the food to be cooked in the heating chamber, the air inside the duct heated by the exhaust heat continuously blows out of the duct and hits the user. Can be prevented and the safety of the user can be ensured.

  In addition, the said control means may perform control which stops the drive of the said ventilation means at the time of the opening operation | movement of the said door after completion | finish of cooking of a to-be-cooked item. Even in this case, the same effect as described above can be obtained.

  The cooking device of the present invention further includes control means for controlling the driving of the blowing means, and the control means is configured such that the air in the duct is supplied to the door at the end of cooking of the cooking object. May be configured to drive the blowing means so that it is conveyed in the opposite direction and discharged to the outside of the cooker. In this case, when the user opens the door after the cooking of the food to be cooked and takes out the food to be cooked in the heating chamber, the air inside the duct heated by the exhaust heat continuously blows out of the duct and hits the user. Can be prevented and the safety of the user can be ensured. Moreover, since the air inside the duct heated by exhaust heat is conveyed in the direction opposite to the supply direction to the door and discharged to the outside of the cooker, the heat dissipation effect of the cooker can be enhanced.

  The control means is configured such that when the door is opened after the cooking of the object to be cooked, the air in the duct is transported in the direction opposite to the supply direction to the door and discharged to the outside of the cooker. Moreover, you may perform control which drives the said ventilation means. Even in this case, the same effect as described above can be obtained.

  Further, the door is formed by arranging three or more transparent substrates to face each other with a gap therebetween, and the air supply means allows the air heated by the exhaust heat to be heated to the most heating chamber side (cooker inner side). ) May be supplied to the gap. In this case, since the transparent substrate on the side closest to the user of the door (outside of the cooker) and the transparent substrate on the inner side thereof are disposed to face each other through a gap to which the air is not supplied, It is possible to prevent the temperature of the transparent substrate on the most user side from being heated by the air, and to ensure the safety of the user.

  According to the present invention, the air heated by the exhaust heat generated in at least one of the heating chamber and the heating medium supply means is supplied to the gap of the door by the air supply means. It is possible to prevent the door from fogging due to a temperature difference from the inside of the door and fogging of the door. As a result, even during cooking, the user can reliably see the heating chamber through the door.

An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a cross-sectional view schematically showing a schematic configuration of a heating cooker according to the present embodiment. This cooking device has a heating chamber 1, a door 2, a heating medium supply unit 3, and an air supply unit 4. In addition, below, let the side in which the door 2 is provided be a front (front surface, front surface), and the opposite side is back (back surface) in a heating cooker. Moreover, the arrow in a figure has shown the flow of superheated steam or air.

  The heating chamber 1 accommodates an object 5 to be cooked. In the heating chamber 1, the cooking object 5 is placed on the support base 6. The door 2 is rotatably provided so as to be opened upward on the front surface of the cooking device, and opens and closes when the cooking object 5 is taken in and out of the heating chamber 1.

  The door 2 is configured by arranging two transparent substrates 2a and 2b to face each other with a gap 2d. Here, the transparent substrate 2a is a transparent substrate on the heating chamber 1 side when the door 2 is closed, and the transparent substrate 2b is a transparent substrate on the user side (the front outside of the cooking device) when the door 2 is closed. The transparent substrates 2a and 2b can be made of, for example, heat resistant glass, plastic, film, or the like. By configuring the door 2 by bonding the transparent substrates 2 a and 2 b in this way, the user can see the inside of the heating chamber 1 through the door 2.

  The door 2 has an opening 2g at the upper part of the surface on which the transparent substrate 2a is provided. The opening 2g is an opening for taking in air in the duct 12 of the air supply unit 4 described later into the gap 2d, and is disposed to face an opening 12a of the door 12 described later. The door 2 has an opening 2h on the lower surface for exhausting the air in the gap 2d.

  The heating medium supply unit 3 functions as a heating medium supply unit that supplies superheated steam as a heating medium to the heating chamber 1. Specifically, the heating medium supply unit 3 includes a superheated steam generation unit 7, a heating unit 8, and a fan 9, which are provided in a convection duct 10 that communicates with the heating chamber 1. .

  The superheated steam generator 7 generates superheated steam. In the superheated steam generator 7, water in a water supply tank (not shown) is fed into the pot by water supply means (not shown) composed of, for example, a water flow pump. Then, for example, when the water in the pot is heated by a heating means (not shown) made of an aluminum cast heater, saturated steam is generated, and the generated saturated steam is further heated to generate superheated steam. By controlling the amount of water supplied to the pot by the above water supply means, the amount of superheated steam generated can be changed.

  The heating unit 8 further heats the superheated steam generated by the superheated steam generation unit 7. The fan 9 is a circulation means for circulating the atmosphere (superheated steam) between the convection duct 10 and the heating chamber 1.

  The air supply unit 4 is an air supply unit that supplies air to the gap 2d between the transparent substrates 2a and 2b in the door 2, and includes a blower 11 and a duct 12. The blower 11 functions as a blowing unit that sends air from one side to the other between the outside and the inside of the cooking device. The duct 12 is a pipe for supplying the air taken in from the outside of the heating cooker by the blower 11 to the gap 2 d of the door 2.

  The duct 12 is provided above the heating chamber 1 and the heating medium supply unit 3. Since the heating atmosphere has a property of collecting upward, the duct 12 is provided above the heating chamber 1 and the heating medium supply unit 3 so that the air inside the duct 12 is heated by the superheated steam. It is efficiently heated by the heat (exhaust heat) discharged from the chamber 1 and the heating medium supply unit 3.

  Moreover, the duct 12 has the opening part 12g provided in the door 2 and the opening part 12a connected in the closed state of the door 2 in the same height position as the opening part 2g. Thereby, the air in the duct 12 is supplied to the gap 2 d of the door 2 through the opening 12 a of the duct 12 and the opening 2 g of the door 2. The communication portion between the door 2 and the duct 12 has a structure in which the door 2 and the duct 12 are in close contact so that there is no air leakage.

  Moreover, FIG. 2 is a block diagram which shows the structure of the heating cooker of this embodiment. The heating cooker of this embodiment further includes a timer 13, a temperature sensor 14, an operation panel 15, and a control unit 16. The timer 13 counts the cooking time of the cooking object 5, and the temperature sensor 14 measures the temperature in the heating chamber 1. The operation panel 15 is an operation unit for the user to set the operating conditions of the device, and includes a display unit that displays the set contents. The control part 16 is a control means which controls operation | movement of each part of a heating cooker. Based on signal inputs from the timer 13, the temperature sensor 14, and the operation panel 15, the control unit 16 controls, for example, water supply timing and superheated steam generation control in the superheated steam generation unit 7, heating control of the heating unit 8, The blower 11 of the air supply unit 4 is driven.

  Next, operation | movement in the heating cooker of this invention is demonstrated based on FIG. 1 and FIG. First, the object to be cooked 5 is placed on the support base 6 in the heating chamber 1 and the door 2 is closed, and then a start button (not shown) on the operation panel 15 is pressed to start cooking. Then, the control unit 16 drives the superheated steam generation unit 7 of the heating medium supply unit 3, drives the heating unit 8 and the fan 9 in the convection duct 10, and the temperature in the heating chamber 1 is changed in the operation panel 15. Generation of superheated steam and supply of superheated steam to the heating chamber 1 are controlled so that the set temperature is reached.

  On the other hand, the air originally existing in the heating chamber 1 is expelled from the exhaust port (not shown) of the heating chamber 1 to the outside of the cooker by an exhaust means (not shown). As a result, the atmosphere in the heating chamber 1 is replaced with superheated steam, and the cooking object 5 in the heating chamber 1 is cooked by this superheated steam.

  Further, the superheated steam in the heating chamber 1 is sucked into the convection duct 10 by the fan 9, heated again by the heating unit 8 in the convection duct 10, and then sent out into the heating chamber 1 again to be cooked. 5 is used for cooking.

  Here, with the start of cooking, the blower 11 of the air supply unit 4 is also driven by the control unit 16, and the air supplied from the outside is sent into the gap 2 d of the door 2 through the duct 12. At this time, as the cooking proceeds, the air inside the duct 12 is heated by the exhaust heat from the heating chamber 1 and the heating medium supply unit 3, and the heated air (superheated air) is transferred from the duct 12 to the door 2. It is supplied to the gap 2d. On the other hand, when the cooking of the cooking object 5 is completed by the count of the timer 13, the driving of the blower 11 is stopped.

  As described above, in the present embodiment, during the cooking of the object to be cooked 5, the air supply unit 4 removes the air heated by the exhaust heat generated in the heating chamber 1 and the heating medium supply unit 3 from the gap of the door 2. Since the air is supplied to 2d, the inside of the door 2 is warmed by this air, and the temperature difference between the inside of the heating chamber 1 and the inside of the door 2 during cooking is reduced. Thereby, it can suppress that condensation arises in the door 2 resulting from the said temperature difference, and can suppress that the door 2 becomes cloudy. As a result, the user can surely see the inside of the heating chamber 1 through the door 2 even during cooking.

  Moreover, in this embodiment, since the exhaust heat emitted from the existing heating chamber 1 and the heating medium supply unit 3 is used to warm the air inside the duct 12, energy can be effectively used. Further, it is not necessary to separately provide a means for warming the air inside the duct 12. Furthermore, since the exhaust heat from the heating chamber 1 and the heating medium supply unit 3 is transmitted to the duct 12 and is used to warm the air in the duct 12, the release of heat to the outside of the cooker is also reduced.

  Further, by configuring the air supply unit 4 with the blower 11 and the duct 12, the duct 12 is disposed in the vicinity of the heating chamber 1 and the heating medium supply unit 3, and the air in the duct 12 is warmed by the exhaust heat, A structure in which air is supplied into the door 2 by driving the blower 11 can be easily realized. Therefore, the dew condensation on the door 2 can be easily suppressed with a simple configuration using the blower 11 and the duct 12.

  Moreover, since the control part 16 stops the drive of the air blower 11 at the time of the completion of cooking of the to-be-cooked object 5, even when a user opens the door 2 in order to take out the to-be-cooked object 5 from the heating chamber 1 after completion | finish of cooking. The superheated air in the duct 12 does not continue to blow out toward the user through the opening 12a. Thereby, it can avoid that a user suffers damage, such as a burn.

  By the way, as shown in FIG. 3, when the cooking of the to-be-cooked object 5 is complete | finished, the control part 16 conveys the air in the duct 12 in the reverse direction to the supply direction to the door 2, and is discharged | emitted outside a cooking appliance. Thus, you may perform control which carries out reverse rotation drive of the air blower 11. FIG.

  Even if it does in this way, even when a user opens the door 2 in order to take out the to-be-cooked object 5 from the heating chamber 1 after cooking, overheated air in the duct 12 is directed to the user through the opening 12a. It is possible to avoid the user from suffering burns or the like without continuing to blow out. In particular, in the case of this control, the superheated air inside the duct 12 heated by exhaust heat is conveyed in the direction opposite to the supply direction to the door 2 and discharged to the outside of the cooker. The effect can also be enhanced. In addition, you may make it perform the said control of the control part 16, ie, the control which reversely drives the air blower 11 at the time of completion | finish of cooking, until the predetermined time passes from the time of completion | finish of cooking for the heat dissipation of a cooking appliance.

  Moreover, the control part 16 is the control which stops the drive of the air blower 11 at the time of the opening operation of the door 2 by a user after cooking of the to-be-cooked object 5, or the direction in which the air in the duct 12 is supplied to the door 2 May be controlled to drive the blower 11 so that it is conveyed in the reverse direction and discharged to the outside of the cooker. In this case, the same effect as described above can be obtained. Such control is realized, for example, by providing detection means for detecting the open / closed state of the door 2, and the control unit 16 controlling the blower 11 as described above based on the detection result of the detection means. Is possible.

  By the way, although this embodiment demonstrated the case where the door 2 was comprised by bonding of two transparent substrates 2a * 2b, this invention is applied even when comprised by bonding of three or more transparent substrates. be able to.

  For example, FIG. 4 is a cross-sectional view schematically showing a schematic configuration of a heating cooker when the door 2 is configured by bonding three transparent substrates 2a, 2b, and 2c. The transparent substrates 2a, 2b, and 2c are opposed to each other with gaps 2d and 2e, respectively. That is, the transparent substrate 2a closest to the heating chamber 1 and the middle transparent substrate 2b are arranged to face each other via a gap 2d, and the transparent substrate 2b closest to the user (outside the cooker) is transparent to the middle transparent substrate 2b. The substrate 2c is disposed so as to face the gap 2e.

  In this case, it is desirable that the air supply unit 4 is configured to supply the air heated by the exhaust heat to the gap 2d closest to the heating chamber 1 of the door 2. That is, the door 2 is configured by providing a partition 2f between the gap 2d and the gap 2e so that the air in the duct 12 heated by the exhaust heat is supplied to the gap 2d of the door 2. Is desirable.

  When such a door 2 is used, the transparent substrate 2c closest to the user of the door 2 and the transparent substrate 2b closer to the heating chamber 1 are opposed to each other through the gap 2e to which no air is supplied. Since it arrange | positions, it can suppress that the transparent substrate 2e of the door 2 most user side is heated with the said air, and the temperature rises. As a result, the safety of the user can be ensured.

  In the present embodiment, when the air in the duct 12 is warmed, the duct 12 is disposed in the vicinity of the heating chamber 1 and the heating medium supply unit 3 to be discharged from both the heating chamber 1 and the heating medium supply unit 3. However, the duct 12 may be arranged so that the exhaust heat of at least one of the heating chamber 1 and the heating medium supply unit 3 can be used. That is, the duct 12 may be disposed in the vicinity of at least one of the heating chamber 1 and the heating medium supply unit 3.

  The duct 12 is arranged above the heating chamber 1 and the heating medium supply unit 3 in consideration of the property that the heating atmosphere accumulates upward. For example, the back surface and the side surface of the convection duct 10 of the heating medium supply unit 3, As long as it is in the vicinity of a heat source that can heat the air in the duct 12 such as the top surface, it can be arranged at any position. Further, a heat sink or the like for heating the air supplied from the outside by the blower 11 more effectively can be provided inside the duct 12 to increase the contact surface with the air.

  In addition, in this embodiment, although the opening part 2g of the door 2 and the opening part 12a of the duct 12 are provided in the front upper part of a cooking-by-heating machine, if these satisfy | fill the conditions connected in communication, it will be various. It can be provided at a position. For example, the duct 12 above the heating chamber 1 is extended to the side surface of the heating chamber 1, the opening 12a is disposed at the center in the height direction in front of the cooker, and the opening 2g of the door 2 is connected to the opening 12a. You may make it provide in the position connected in communication. That is, the opening 2g of the door 2 and the opening 12a of the duct 12 may be provided at the same height and connected to each other.

  In the present embodiment, the opening 2h as the exhaust port of the door 2 is provided on the lower surface of the door 2, but is not limited to this position, and any position within a range not departing from the gist of the invention. Can be formed. It is also possible to adopt a structure in which the air inside the door 2 exhausted through the opening 2h is once returned to the duct 12 and supplied again to the gap 2d of the door 2.

  In the present embodiment, the superheated steam generator 7 is provided in the convection duct 10, but may be arranged at various positions as long as the superheated steam can be supplied into the heating chamber 1. Is possible. For example, the superheated steam generator 7 may be disposed outside the convection duct 10, and the superheated steam generated in the superheated steam generator 7 may be supplied to the heating chamber 1 through the convection duct 10.

  In this embodiment, the convection duct 10 is provided at the rear (back side) of the heating chamber 1. However, the convection duct 10 can heat the atmosphere in the heating chamber 1 such as the ceiling portion, bottom surface, or side surface vicinity of the heating chamber 1. It can be installed at any position as long as it can satisfy the conditions.

  In addition, in this embodiment, although the heating medium supply part 3 demonstrated the structure which produces | generates superheated steam as a heating medium of the to-be-cooked object 5, and supplies it to the heating chamber 1, hot air is supplied to the heating chamber 1 as a heating medium. Even if it is a structure, the effect of this invention mentioned above can be acquired.

It is sectional drawing which shows typically the outline structure of the heating cooker which concerns on one Embodiment of this invention. It is a block diagram which shows the structure of the said heating cooker. It is sectional drawing which shows typically the outline structure of the said cooking-by-heating machine which reversely drives the air blower after completion of cooking. It is sectional drawing which shows typically the outline structure of the said heating cooker which made the door the structure of 3 sheets.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heating chamber 2 Door 2a Transparent substrate 2b Transparent substrate 2c Transparent substrate 2d Gap 3 Heating medium supply part (heating medium supply means)
4 Air supply part (air supply means)
5 To-be-cooked item 7 Superheated steam generator (heating medium supply means)
8 Heating unit (heating medium supply means)
9 Fan (heating medium supply means)
11 Blower (Blower means)
12 Duct 16 Control unit (control means)

Claims (7)

A heating chamber in which an item to be cooked is stored;
A door that opens and closes when the food is taken in and out of the heating chamber;
A heating cooker for heating and cooking an object to be cooked in the heating chamber with the heating medium, the heating medium supplying means for supplying a heating medium to the heating chamber,
The door has at least two transparent substrates arranged to face each other with a gap between them,
An air supply means for supplying air to the gap of the door;
The cooking device according to claim 1, wherein the air supply means supplies air heated by exhaust heat generated in at least one of the heating chamber and the heating medium supply means to the gap of the door.   The cooking device according to claim 1, wherein the heating medium supply means generates superheated steam as the heating medium and supplies the superheated steam to the heating chamber. The air supply means includes
A blowing means for sending air from one side to the other between the outside and inside of the cooker;
The heating cooker according to claim 1 or 2, further comprising a duct for supplying air taken into the inside of the cooker from the outside by the blowing means to the gap of the door.   The heating cooker according to claim 3, wherein the duct is provided above the heating chamber. A control means for controlling the driving of the air blowing means;
The cooking device according to claim 3 or 4, wherein the control means stops the driving of the blower means when cooking of the object to be cooked is completed. A control means for controlling the driving of the air blowing means;
The control means drives the blower means so that the air in the duct is conveyed in the direction opposite to the supply direction to the door and discharged to the outside of the cooker at the end of cooking of the object to be cooked. The heating cooker according to claim 3 or 4. The door has three or more transparent substrates arranged to face each other with a gap between them,
The heating cooker according to any one of claims 1 to 6, wherein the air supply means supplies the air heated by the exhaust heat to a gap closest to the heating chamber of the door.

Images