JP2016031185A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating cooker which prevents a user from feeling discomfort even when the user is exposed to an exhaust gas.SOLUTION: A heating cooker 1 includes: a cooking container 6 in which a cooking ingredient is placed; heating means for heating the cooking ingredient; heat exhaust processing means 5 which is provided in an exhaust passage 23 communicating with the cooking container 6 and performs heat exhaust processing, such as cooling and dehumidification, to an exhaust gas occurring in the cooking container 6; and a draft air duct 46 which allows a housing suction port 47 opened in a housing 3 of the heating cooker 1 to communicate with a housing exhaust port 29 and is provided with ventilation means 48. The heat exhaust processing means 5 faces the draft air duct 46.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an exhaust treatment of a heating cooker used in a general household kitchen or a commercial kitchen.

  In a smokeless roaster as a conventional heating cooker, an electromagnetic induction heating tool (work coil) for heating a heating body is installed in a box having a blower circuit connected to a blower fan, and a smoke exhaust opening a smoke absorption hole on the inner surface A box composed of a ring body, a smoke exhaust pipe, and a smoke collector, a non-contact smoke exhaust circuit provided in the blower circuit, and a smoke exhaust fan connected to a smoke exhaust port opened at the bottom center of the smoke collector And a smoke exhaust duct that communicates with the outside (see, for example, Patent Document 1).

  The operation in the above configuration will be described. When the work coil is energized, the heating body becomes red hot within a few minutes and reaches about 800 ° C. The air on the upper surface of the heating body is heated and raised by the red-heated heating body, and the food is baked by the radiant heat (near infrared, middle infrared, far infrared) from the heating body. At the same time, the blower fan is activated to start blowing, and the blown air from the blower fan prevents overheating of the work coil.

  On the other hand, during cooking, the smoke exhaust fan operates, and the water vapor, oil, and odor generated from the food by this suction operation are further heated to produce superheated steam and oil smoke to become exhaust gas. This exhaust gas is sucked into the smoke exhaust holes of the smoke exhaust ring and introduced into the smoke exhaust pipe, and further gathers in the smoke collector, and passes through the smoke exhaust duct from the cylindrical smoke exhaust port at the center of the smoke collector bottom. Is discharged. That is, the exhaust gas does not leak into the room where the user is located (outside the box). It should be noted that a filter for removing oil and dust and a filtering device can be incorporated in the smoke exhaust duct.

  In addition, in a built-in device as a conventional heating cooker, an exhaust path arranged outside the kitchen room, an exhaust device that discharges outside the kitchen room provided in the exhaust path, and the inside of the apparatus and the exhaust path are connected through the kitchen wall of the kitchen room (For example, refer to Patent Document 2).

  And the cooling air inside an apparatus will be discharged | emitted outside a kitchen room by an exhaust device through an exhaust path through an exhaust duct. Therefore, it is not necessary to arrange the cold air exhaust port of the device above the device, and a heating cooker excellent in aesthetic appearance is provided.

JP 2001-340234 A JP 2009-89993 A

  However, in the conventional cooking device, the smoke exhaust fan is operated during cooking, and the exhaust gas such as superheated steam, oil smoke, and odor generated from the food by the suction action of the smoke exhaust fan and heated is generated. Then, it is sucked into the smoke absorption hole of the exhaust ring and introduced into the exhaust pipe. Subsequently, the exhaust gas collects in the smoke collector and is discharged outside through the smoke exhaust duct from the smoke exhaust port at the bottom of the smoke collector. That is, there has been a problem that an exhaust fan and a smoke exhaust duct to the outside are required so that the exhaust gas does not diffuse into the room where the user is located (outside the box).

  Moreover, in order to discharge the cooling air inside the equipment to the outside of the kitchen room, there is a problem that an exhaust path provided with an exhaust device via an exhaust duct is required.

  The smoke exhaust duct and the exhaust duct extend to the outside of the room, so the distance is long and the passage pressure loss increases accordingly. In addition, the smoke exhaust fan and the exhaust fan are required to have a large capacity that exceeds the passage pressure loss.

  In other words, since the heat, humidity, odor, wind pressure, etc. of the exhaust gas cause discomfort in the conventional cooking device, a means for preventing the user of the cooking device from being exposed to the exhaust gas is required. .

  This invention solves the said conventional subject, and it aims at providing the heating cooker which does not produce discomfort even if the user of a heating cooker is exposed to exhaust gas.

  In order to solve the above-described conventional problems, a heating cooker according to the present invention includes a cooking container that can store cooking ingredients, a heating unit that heats cooking ingredients stored in the cooking container, and the cooking container. An exhaust passage communicating with the exhaust passage, exhaust heat treatment means formed in the exhaust passage for performing exhaust heat treatment such as cooling and dehumidification of the exhaust gas generated in the cooking vessel, the cooking vessel, the heating means, and the exhaust passage. A housing suction port and a housing exhaust port that are open to the housing, a blower passage provided with a blowing means, and the exhaust heat treatment means facing the blower passage. is there.

  As a result, exhaust gas containing superheated steam and oily smoke is generated from the cooking ingredients heated by the heating means in the cooking container, and this exhaust gas flows into the exhaust heat treatment means from the cooking container through the exhaust passage, and blower means As the exhaust heat treatment means cools the exhaust heat treatment means by sucking air from the housing suction port, the exhaust heat treatment means performs exhaust heat treatment such as cooling and dehumidification and then exhausts the exhaust gas outside the housing as exhaust gas. The user of the cooking device does not experience discomfort due to the exhaust gas discharged from the cooking device.

  The heating cooker according to the present invention performs exhaust heat treatment such as cooling and dehumidification on exhaust gas generated during cooking, and then discharges the exhaust gas outside the casing, so that the user of the heating cooker is exposed to the exhaust gas. However, there is no discomfort due to the exhaust gas.

The perspective view which showed the heating cooker in Embodiment 1 of this invention The external view which has arrange | positioned the heating cooker in Embodiment 1 of this invention below the induction heating cooking appliance The perspective view which showed the heating cooker except the top plate in Embodiment 1 of this invention Front sectional drawing which showed the heating cooking means and waste heat treatment means of the heating cooker in Embodiment 1 of this invention 4 is a cross-sectional view taken along line A-A in FIG. 4 showing the cooking device of the cooking device according to Embodiment 1 of the present invention. BB sectional view of FIG. 4 showing the waste heat treatment means of the heating cooker in the first embodiment of the present invention. Front expanded sectional view which showed the heating cooking means of the heating cooker in Embodiment 1 of this invention The expanded sectional view which showed the purification | cleaning means of the heating cooker in Embodiment 1 of this invention Front expanded sectional view which showed the waste heat processing means of the heating cooker in Embodiment 1 of this invention The top view which showed the heating cooker in Embodiment 1 of this invention The perspective view which showed the heating cooker in Embodiment 2 of this invention Front sectional drawing which showed the heating cooking means and waste heat treatment means of the heating cooker in Embodiment 2 of this invention CC sectional drawing of FIG. 12 which showed the waste heat processing means of the heating cooker in Embodiment 2 of this invention

  1st invention is formed in the cooking container which can store cooking foodstuffs, the heating means which heats the cooking foodstuffs stored in the cooking container, the exhaust passage connected with the inside of the cooking container, and the exhaust passage An exhaust heat treatment means for performing exhaust heat treatment such as cooling and dehumidification of the exhaust gas generated in the cooking container, and a casing including the cooking container, the heating means, and the exhaust passage. The housing suction port and the housing exhaust port that are opened communicate with each other, and the exhaust passage is provided with the air blowing means, and the exhaust heat treatment means faces the air passage.

  As a result, exhaust gas containing superheated steam and oily smoke is generated from the cooking ingredients heated by the heating means in the cooking container, and this exhaust gas flows into the exhaust heat treatment means from the cooking container through the exhaust passage, and blower means As the exhaust heat treatment means cools the exhaust heat treatment means by sucking air from the housing suction port, the exhaust heat treatment means performs exhaust heat treatment such as cooling and dehumidification and then exhausts the exhaust gas outside the housing as exhaust gas. The user of the cooking device does not experience discomfort due to the exhaust gas discharged from the cooking device.

  In the second aspect of the invention, in particular, the heating means of the first aspect of the invention faces the air passage, whereby natural convection formed by a large amount of heat radiation from the outer shell of the cooking vessel flows through the air passage. Since it is attracted by the cooling air and discharged from the housing exhaust port, the temperature rise in the vicinity of the cooking container can be suppressed, and the heat deterioration of the cooking means can be prevented.

  In the third invention, in particular, the waste heat treatment means of the first invention is provided with a heat storage type heat exchanger, whereby the heat storage type heat exchanger is made from the exhaust gas flowing into the exhaust passage from the cooking vessel. Takes away heat and temporarily stores heat. In particular, even if the heating amount of the heating means is remarkably large, exhaust gas heat and steam are not exhausted to the outside of the housing at once, but are exhausted slowly with a delay, but the exhaust gas exhaust time becomes longer. The peak of exhaust gas temperature and humidity can be kept low (smoothing). As a result, the user of the heating cooker does not feel uncomfortable with the exhaust gas even if the heating amount is extremely large.

  In the fourth aspect of the invention, in particular, the heating means of any one of the first to third aspects is provided with a magnetron that generates microwaves, whereby microwave heating increases the heating efficiency of cooking ingredients. Because it is good, energy saving and time saving can be achieved, and the amount of exhaust heat is remarkably reduced. Moreover, since microwave heating heats the interior without scorching the cooked food, the moisture content of the cooked food can be adjusted by the output of the magnetron, the driving time, and the like.

  In the fifth invention, in particular, the air passage of the fourth invention is one in which the air blowing means is disposed on the housing suction port side, the magnetron is disposed in the middle, and the exhaust heat treatment means is disposed on the housing exhaust port side. Cooling air flowing from the housing suction port can cool efficiently while colliding with the magnetron first. Further, since the exhaust gas discharged from the outlet of the exhaust passage and the cooling air flowing through the air passage are mixed, the temperature and humidity of the exhaust gas can be kept low. In particular, the saturated exhaust gas flowing out from the exhaust passage is cooled by the outside air to generate water vapor, that is, steam, but since the steam melts into the cooling air, the steam becomes invisible, and the user of the heating cooker No discomfort caused by steam.

  In the sixth invention, in particular, the housing suction port and the housing exhaust port of any one of the first to fourth inventions are provided with an interval to sandwich the cooking container, and are opened on the front surface of the housing. Thereby, it is possible to prevent the exhaust gas discharged from the housing exhaust port from being sucked into the housing suction port again. Therefore, low temperature and low humidity outside air can always be sucked from the housing suction port.

  In the seventh invention, in particular, the exhaust heat treatment means of any one of the first to sixth inventions is provided with a purification means comprising a purification catalyst and a catalyst heating means in the exhaust passage downstream of the cooking vessel, Thereby, the purification means can decompose the oil smoke and prevent the oil film from adhering to the exhaust passage and the exhaust heat treatment means. That is, it is possible to prevent deterioration in performance of the heat treatment means and to suppress odor.

  In the eighth invention, in particular, the exhaust passage of any one of the first to sixth inventions is provided with exhaust air blowing means for sucking air from the cooking container, whereby the exhaust gas from the cooking container into the housing. Leakage is prevented and exhaust gas passes through the exhaust path.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1 is a perspective view showing a heating cooker according to Embodiment 1 of the present invention, FIG. 2 is an external view in which the heating cooker is disposed below the induction heating cooker, and FIG. 3 is the same heating excluding the top plate. FIG. 4 is a front cross-sectional view showing the heating cooking means and the exhaust heat treatment means of the heating cooker, and FIG. 5 is an AA of FIG. 4 showing the heating cooking means of the heating cooker. Sectional drawing and FIG. 6 are BB sectional views of FIG. 4 showing the waste heat treatment means of the heating cooker. FIG. 7 is an enlarged front sectional view showing the cooking device of the heating cooker according to Embodiment 1 of the present invention, and FIG. 8 is an enlarged sectional view showing the purification means of the cooking device according to Embodiment 1 of the present invention. FIG. 9 is an enlarged front sectional view showing the waste heat treatment means of the heating cooker according to Embodiment 1 of the present invention, and FIG. 10 is a top view showing the heating cooker according to Embodiment 1 of the present invention.

  As shown in FIGS. 1-10, the heating cooker 1 is arrange | positioned under the induction heating cooker 2, is included in the housing | casing 3, and is provided in a system kitchen etc. As shown in FIG. The heating cooker 1 includes a heating cooking means 4 and an exhaust heat treatment means 5. The heating cooking means 4 includes a cooking container 6 capable of storing cooked ingredients, an upper heating means 7, a lower heating means 8, a microwave heating means 9, and an outer shell 10. The heating means includes an upper heating means 7, a lower heating means 8, and a microwave heating means 9.

  In particular, as shown in FIGS. 4 and 5, the cooking container 6 has an openable / closable door 11 into which cooking ingredients are placed in front of the housing 3, and a number of openings 12 serving as protective fences are opened at the top. In addition, a heat-resistant glass floor 13 is disposed on the bottom surface. The upper heating means 7 is composed of one near red tube heater 14 (also used for illumination), two far red tube heaters 15 and a reflecting plate 16 for heating cooking food provided on the upper portion of the cooking container 6. The lower heating means 8 is composed of two far-infrared tube heaters 17 and a reflection plate 18 for heating cooking ingredients provided below the heat-resistant glass floor 13. The microwave heating means 9 includes a radiation port 19 opened on the rear surface of the cooking vessel 6, a magnetron 20, and a waveguide 21 that communicates these. The upper heating means 7, the lower heating means 8, and the microwave heating means 9 are controlled by a control unit (not shown). The outer shell 10 is arranged with a gap between the cooking container 6 and the reflectors 16 and 18. An aluminum or iron cooking dish 22 coated with fluorine is placed on a heat-resistant glass floor 13 so that cooking ingredients can be placed thereon.

In particular, as shown in FIGS. 4 and 6, the exhaust heat treatment means 5 includes a purification means 24 provided upstream of the exhaust passage 23, a multi-tube air-cooled heat exchanger 25 provided in the middle of the exhaust passage 23, The water tank section 26 is provided downstream of the exhaust passage 23. The exhaust path 23 communicates the cooking container exhaust port 27 opened on the side surface of the cooking container 6 and the exhaust air blowing means 28 including an axial fan disposed at the downstream end of the water tank portion 26. The exhaust air blowing means 28 faces the housing exhaust port 29 opened on the front right side of the housing 3. As shown in FIG. 8, the purification means 24 includes a catalyst heating means 30 comprising a single far-red tube heater, a purification catalyst 31 in which platinum or palladium is applied to a metal body (for example, a perforated plate such as a punching plate), exhaust gas, and the like. The catalyst case 32 is directly connected to the path 23.

  In particular, as shown in FIG. 6, the air-cooled heat exchanger 25 includes seven U-shaped heat transfer tubes 35 that connect the upstream header 33 and the downstream header 34. The water tank portion 26 includes a water tank 36 that communicates with the downstream header 34 and a hollow water container 37 that communicates with the exhaust air blowing means 28 and sets the dish-shaped water tank 36 therein. The water tank 36 is detachable from the downstream header 34 by a fitting portion 38 using an O-ring. The radio wave leakage prevention 41 is a choke structure provided on the door 11.

  In particular, as shown in FIG. 4, the water tank heating means 39 is a cord heater attached to the bottom lower surface of the water tank portion 26. The temperature sensor 40 is a thermistor, a thermocouple, or the like, and is provided in the vicinity of the cooking vessel exhaust port 27. The radio wave leakage prevention 42 is a perforated plate provided in the cooking vessel exhaust port 27. The induction heating cooker 2 includes a heat-resistant glass top plate 44 and induction heating cooking means 45 provided with a plurality of induction heating coils.

  In particular, as shown in FIG. 10, the airflow path 46 having a U-shape in a plane (a space excluding the space for the heating and cooking means 4 in the housing 3) is a housing suction opening on the front left side of the housing 3. The port 47 and the case exhaust port 29 communicate with each other, and from the case suction port 47 side, the air blowing means 48 composed of a sirocco fan, the microwave heating means 9 and the exhaust heat treatment means 5 are included in this order. In particular, the exhaust heat treatment means 5 is disposed on the downstream side of the air passage 46 and in front of the housing exhaust port 29, and the air blowing means 48 faces the magnetron 20. The cooking means 4 excluding the microwave heating means 9 faces the air passage 46 through a gap 50 between the air passage partition wall 49 and the induction heating cooker 2 or the top plate 44 (see FIG. 4). Further, the housing suction port 47 and the housing exhaust port 29 are opened to the left and right in front of the housing 3 so as to sandwich the heating cooking means 4 (door 11).

The operation of the cooking device configured as described above will be described.
First, the cooking device 4 will be described with reference to FIGS. 4, 5, 7, and 10. The cooking dish 22 on which cooking ingredients such as fish are placed is opened on the heat-resistant glass floor 13 with the door 11 open, and then the door 11 is closed. Next, the control unit appropriately energizes the upper heating means 7, the lower heating means 8, the microwave heating means 9, the catalyst heating means 30, the exhaust air blowing means 28, and the air blowing means 48. As a first procedure, the radiation from the near red tube heater 14 and the far red tube heater 15 of the upper heating means 7 is directly reflected by the reflecting plate 16 and passes through a large number of openings 12 so that the upper surface of the cooked food is covered. Bake. As a second procedure, the radiation from the far-red tube heater 17 of the lower heating means 8 is directly reflected by the reflector 18 and passes through the heat-resistant glass floor 13 to heat the lower surface of the cooking dish 22. Subsequently, the cooking dish 22 whose temperature has risen bakes the lower surface of the cooked food material by heat conduction. As a third procedure, the microwave irradiated from the magnetron 20 of the microwave heating means 9 passes through the waveguide 21 and enters the cooking container 6 through the radiation port 19 and is baked from the inside of the cooking ingredients.

For example, when the cooked food is sansan, the control unit starts driving the exhaust air blowing means 28 and the air blowing means 48, and performs the first and second procedures simultaneously to bake the upper and lower surfaces of the sansan. At the same time, the control unit estimates the number of tails (heat capacity) of the salted sesame from the temperature change of the temperature sensor 40 at the cooking vessel exhaust port 27 and the predetermined temperature arrival time, and the time of the savory coloring and the internal temperature rise ( Evaporation) time is determined. Thereafter, when the determined burn-in time has elapsed, the control unit significantly lowers the input to the first and second procedures in order to prevent scorching, and starts performing the third procedure. Next, the controller stops the first to third procedures, the catalyst heating means 30 and the exhaust air blowing means 28 when the determined internal temperature rise (evaporation) time elapses and the salt sesame is baked. Depending on the cooking ingredients, the first and second procedures may be stopped when the determined baking time has elapsed.

  In particular, since microwave heating has good heating efficiency for cooking ingredients, energy saving and time saving can be achieved, and the amount of exhaust heat is significantly reduced. Moreover, since microwave heating heats the interior without scorching the cooked food, the moisture content of the cooked food can be adjusted by the output of the magnetron 20 and the drive time. For example, when microwave heating is completed in a short time, a moist texture can be obtained. In another example, if the output of the magnetron 20 is increased, the cooked food can be baked well and the built-in salted rice can be eaten.

  When the first and second procedures are performed, the cooking container 6 is heated by the upper heating means 7 and the lower heating means 8 to store heat. Thereafter, the cooking container 6 that has reached a high temperature dissipates heat through the outer shell 10. However, when the third procedure is performed, the cooking container 6 is not heated by the microwave so much.

  On the other hand, during cooking, the temperature in the cooking vessel 6 rises to about 200 to 300 ° C. At that time, heating by convection is also added and the temperature of the salt is also raised, and steam, oil, odor components, etc. are generated from the salt. . Further, steam or oil is heated by the upper heating means 7 and the cooking pan 22 and also heated by the convection, and exhaust gas containing superheated steam and oil smoke (for example, a thick black arrow shown in FIG. 4) is generated. To do.

  At that time, the pressure in the cooking vessel 6 becomes higher than the atmospheric pressure due to the volume expansion of the exhaust gas. Due to this pressure rise, the exhaust gas flows from the cooking vessel 6 into the low pressure exhaust passage 23 and reaches the exhaust heat treatment means 5.

  However, the exhaust gas cannot flow into the exhaust passage 23 from the cooking vessel 6 unless the pressure rises by the pressure loss of the exhaust passage 23 and the catalyst heating means 30. On the other hand, the exhaust gas whose pressure has increased in the cooking vessel 6 is less sensitive, for example, the attachment portion between the outer shell 10 and the near red tube heater 14 and the far red tube heaters 15 and 17 and the contact portion between the cooking vessel 6 and the door 11. Leaks from. Therefore, in actual use, the exhaust air blowing means 28 is provided, and the exhaust gas flows into the exhaust passage 23 from the cooking container exhaust port 27 of the cooking container 6 by the suction action of the exhaust air blowing means 28 and reaches the purification means 24. That is, the exhaust air blowing means 28 prevents the exhaust gas from leaking from the cooking container 6 into the casing 3 in addition to the exhaust path 23 (exhaust gas always flows into the exhaust path 23).

  If the exhaust air blowing means 28 has a suction pressure higher than the pressure loss of the exhaust passage 23 and the catalyst heating means 30, the exhaust gas can flow into the exhaust passage 23 from the cooking vessel 6. That is, static pressure such as an axial fan is sufficient for the exhaust air blowing means 28. (Practically, the airtightness of the cooking container 6 is not sufficient and the inflow of air is inevitable, so the displacement is 10 to 60 L / min). Naturally, when the airtightness of the heating cooking means 4 can withstand the pressure in the cooking container 6, the exhaust air blowing means 28 is not necessary. The internal pressure of the cooking vessel 6 and the exhaust path 23 is almost atmospheric pressure because the exhaust gas is volume-expanded but is sucked into the exhaust air blowing means 28.

  Further, the air blowing means 48 (for example, 100 to 800 L / min) air-cools the magnetron 20 and its electric circuit. That is, the air blowing means 48 sets a single-digit air volume larger than that of the exhaust air blowing means 28.

Next, the operation of the blowing means 48 will be described with reference to FIGS. 1 and 10 in particular. The cooling air (white arrow) formed by the air blowing means 48 by sucking outside air from the housing suction port 47 flows along a U-shaped air passage 46, that is, the air passage partition wall 49 in a plan view. When the third procedure is performed, the cooling air blown from the blower 48 immediately collides with the magnetron 20 and its electric circuit (for example, about 500 W of exhaust heat amount) to cool it. Subsequently, the cooling air reaches the exhaust heat treatment means 5. The housing suction port 47 and the housing exhaust port 29 are opened with a space therebetween, so that the exhaust gas discharged from the housing exhaust port 29 can be prevented from being sucked into the housing suction port 47 again. . Therefore, since the low temperature and low humidity outside air can always be sucked from the housing suction port 47, the air cooling performance and the dilution performance are maintained high.

  Next, the operation of the catalyst heating means 30 will be described with reference to FIGS. 4, 6, and 8 in particular. Since the far-red tube heater of the catalyst heating means 30 heats the exhaust gas and the purification catalyst 31 to 300 ° C. or higher, the activated purification catalyst 31 decomposes oil smoke and odor components of the exhaust gas. Exhaust gas obtained by decomposing oil smoke and odor components flows into the air-cooled heat exchanger 25. As a result, oil smoke and odor components do not adhere to the exhaust passage 23, the upstream header 33, the downstream header 34, the heat transfer pipe 35, and the inner surface of the water tank 26, and cause heat resistance and odor. That is, since the purification means 24 can prevent the oil film from adhering, the heat exchange performance of the air-cooled heat exchanger 25 is stabilized.

  Next, the operation of the air-cooled heat exchanger 25 will be described with reference to FIGS. 1, 4, and 6 in particular. Since the cooling air (white arrow) collides with the upstream header 33 and the downstream header 34 to improve the heat transfer coefficient, the exhaust gas (black arrow) passing through each of the upstream header 33 and the downstream header 34 is very Cooled well. On the other hand, the exhaust gas passing through the inside of the heat transfer tube 35 is sufficiently cooled by the cooling air flowing along the heat transfer tube 35 because the surface area of the heat transfer tube 35 is larger than that of the upstream header 33 and the downstream header 34. In particular, when the U-shape of the heat transfer tube 35 is passed, the efficiency is improved because the cooling air and the exhaust gas face each other. As a result, the exhaust gas in the vicinity of the inner wall of the heat transfer tube 35 and the downstream header 34 becomes 100 ° C. or less, and condensed water is formed on the heat transfer tube 35 and the inner wall of the downstream header 34 while dissolving odor components. That is, the exhaust gas is further purified. On the other hand, the temperature of the cooling air rises due to the magnetron 20 and its electric circuit and exhaust gas (mainly latent heat of water vapor).

  Next, the condensed water gathers from the heat transfer pipe 35 to the downstream header 34, flows into the water tank portion 26, and is stored in the water tank 36. Further, the exhaust gas passing through the water tank 26 is further purified by contacting the condensed water in the water tank 36 and dissolving odor components and water vapor in the condensed water.

  And since the exhaust gas discharged | emitted from the exhaust ventilation means 28 is mixed with the cooling air which flows through the ventilation path 46, the temperature (for example, 50-60 degreeC) and humidity of exhaust gas are restrained low, and a housing | casing exhaust port is normal temperature. 29 is discharged to the front lower side of the housing 3. As a result, even if the user of the cooking device 1 is exposed to the exhaust gas, discomfort (heat, humidity, odor, wind pressure, etc.) due to the exhaust gas can be prevented. In particular, the saturated exhaust gas discharged from the exhaust air blowing means 28 is cooled by the outside air to generate water vapor, that is, steam, but melts into the cooling air, so that the steam is not visible, and the user of the heating cooker 1 can see it. Does not cause discomfort due to steam.

  In addition, natural convection (thin and small black arrow) formed by a large amount of heat radiation (for example, about 300 W of exhaust heat) through the outer shell 10 when the cooking container 6 that has become hot during the first and second procedures is used as cooling air. Since it is attracted or flows out from the gap 50 to the air passage 46, the heat cooking means 4 can be prevented from being thermally deteriorated.

  When cooking of the cooking ingredients is completed, the control unit stops energization of the upper heating means 7, the lower heating means 8, and the microwave heating means 9, and energizes the catalyst heating means 30, the exhaust air blowing means 28, and the air blowing means 48. Is stopped as appropriate. And the cooking dish 22 which put the cooked cooking ingredients is taken out by opening the door 11, and then the door 11 is closed. Further, the control unit energizes the water tank heating means 39 to heat the water tank unit 26 to evaporate the condensed water and odor components stored in the water tank 36 over several hours, and from the housing exhaust port 29 to the housing. It is gradually discharged to the front of the body 3. In addition, since the exhaust gas discharged to the front of the housing 3 is a small amount and immediately diluted, there is no problem of odor practically. Further, the water tank 36 can be removed from the fitting portion 38 and washed.

  As described above, in the first embodiment, first, after the cooked food is put in the cooking container 6, the heating unit starts heating the cooking container 6 and the cooked food, and the driving of the blowing unit 48 is started. Thereafter, the temperature in the cooking container 6 rises to about 200 to 300 ° C., and the temperature of the cooked food also rises, and steam, oil, odor components and the like are generated from the cooked food. Furthermore, since the heating means heats the steam and oil, exhaust gas containing superheated steam and oil smoke is generated, and the pressure in the cooking vessel 6 becomes higher than atmospheric pressure due to the volume expansion of the exhaust gas. Due to this pressure rise, the exhaust gas flows from the cooking vessel 6 into the low pressure exhaust passage 23 and reaches the exhaust heat treatment means 5. The cooling air that the air blowing means 48 has flowed in from the housing suction port flows through the air passage, cools the exhaust heat treatment means 5 while flowing in the vicinity of the exhaust heat treatment means 5, and then is discharged from the housing exhaust port. At that time, the exhaust heat treatment means 5 performs exhaust heat treatment such as cooling and dehumidification and then exhausts the exhaust gas to the outside of the housing 3, so that even if the user of the heating cooker is exposed to the exhaust gas, the exhaust heat treatment means 5 No gas discomfort (heat, humidity, wind pressure, etc.).

(Embodiment 2)
A cooking device according to Embodiment 2 of the present invention will be described.
FIG. 11 is a perspective view showing a heating cooker according to Embodiment 2 of the present invention, FIG. 12 is a front sectional view showing heating cooking means and exhaust heat treatment means of the heating cooker, and FIG. It is CC sectional drawing of FIG. 12 which showed the waste heat processing means.

  Hereinafter, the same components as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted. The difference from the first embodiment is that the waste heat treatment means 51 is configured by an air-cooled heat exchanger 52 on the upstream side and a heat storage heat exchanger 53 on the downstream side. The air-cooled heat exchanger 52 includes seven U-shaped heat transfer tubes 55 connected to the upstream header 54. The heat storage heat exchanger 53 includes seven heat transfer tubes 59 that pass through a heat storage case 57 containing a heat storage material 56 and press-fit diffusion fins 58, and a downstream header 60 that is connected to the heat transfer tube 59. . The heat transfer tube 55 and the heat transfer tube 59 are connected to each other. As the heat storage material 56, a heat storage material having a melting point of less than 100 ° C., for example, sodium acetate trihydrate (Kanto Chemical Co., Ltd. heat of fusion 241 kJ / kg, melting point 58 ° C.) is used.

  The cooling air that has reached the exhaust heat treatment means 51 will be described. The cooling air (white arrow) flows around the upstream header 54 and flows into the air-cooled heat exchanger 52. In addition, the clearance gap between the housing | casing 3 and the ventilation path partition 49 and the clearance gap between the thermal storage case 57 and the ventilation path partition 49 are narrowed so that cooling air may not flow into the thermal storage heat exchanger 53 very much.

  Next, the operation of the air-cooled heat exchanger 52 will be described. Since the cooling air collides with the upstream header 54 and the downstream header 60 to improve the heat transfer rate, the exhaust gas passing through the inside of the upstream header 54 is cooled very well. On the other hand, the exhaust gas passing through the inside of the heat transfer tube 55 is sufficiently cooled by the cooling air flowing along the heat transfer tube 55 because the surface area with the heat transfer tube 55 is larger than that of the upstream header 54. As a result, the exhaust gas near the inner wall of the heat transfer tube 55 becomes 100 ° C. or lower, and condensed water is formed on the inner wall of the heat transfer tube 55 while dissolving odor components. That is, the exhaust gas is further purified and flows into the regenerative heat exchanger 53.

  Next, the operation of the heat storage type heat exchanger 53 will be described. In the heat storage type heat exchanger 53, the exhaust gas passing through the heat transfer tube 59 is absorbed by the heat storage material 56, and the exhaust gas is in the saturated state below the melting point (less than 100 ° C.) at the maximum from the heat storage type heat exchanger 53 to the water tank section. 26. That is, the exhaust gas is absorbed by the sensible heat (specific heat) or latent heat of the heat storage material 56, the exhaust gas in the vicinity of the inner wall of the heat transfer tube 59 becomes below the melting point, and condensed water is formed on the inner wall of the heat transfer tube 59 while dissolving odor components. That is, the exhaust gas is further purified.

  Subsequently, the condensed water gathers from the heat transfer pipe 59 to the downstream header 60, flows into the water tank unit 26, and is stored in the water tank 36. Further, the exhaust gas passing through the water tank 26 is further purified by contacting the condensed water in the water tank 36 and dissolving odor components and water vapor in the condensed water. The exhaust gas discharged from the exhaust air blowing means 28 is mixed with the cooling air flowing through the air passage 46, so that the temperature and humidity of the exhaust gas are kept low, and the normal temperature is kept from the case exhaust port 29 to the front of the case 3. Discharged. In particular, the heat storage heat exchanger 53 takes heat from the exhaust gas flowing through the heat transfer tube 59 and temporarily stores the heat. As a result, even if the heating amount of the upper heating means 7 and the lower heating means 8 is remarkably large, the heat and humidity of the exhaust gas are not exhausted to the outside of the housing 3 but are exhausted gradually with a delay. The exhaust gas discharge time becomes longer, but the exhaust gas temperature (for example, 40 to 50 ° C.) and the humidity peak are kept low (smoothing). As a result, even if the heating amount is extremely large, the user of the heating cooker 1 does not feel uncomfortable with the exhaust gas.

  Thereafter, the heat storage type heat exchanger 53 reaches room temperature in a few hours by radiating the stored heat from the inner wall of the heat transfer tube 59 and the outer wall of the heat storage case 57. Even when cooking of cooking ingredients is started again, the heat storage heat exchanger 53 gradually exhausts the exhaust gas whose temperature has been lowered by the endothermic effect from the front of the housing 3 through the housing exhaust port 29. Prevents people from feeling uncomfortable with exhaust gas. That is, the exhaust heat treatment means 51 can repeatedly exhaust the exhaust gas.

  As described above, in the second embodiment, the exhaust heat treatment means 51 is provided with the heat storage type heat exchanger 53, so that the heat storage type heat exchanger 53 flows into the exhaust passage 23 from the cooking container 6. It takes heat from the exhaust gas and stores it temporarily. In particular, even if the heating amount of the heating means is remarkably large, the exhaust gas discharge time is prolonged by delaying and gradually discharging the heat and steam of the exhaust gas to the outside of the housing 3 at a stretch. However, the temperature and humidity peaks of the exhaust gas can be kept low (smoothing). As a result, the user of the heating cooker 1 does not feel uncomfortable with the exhaust gas even if the heating amount is extremely large.

  As described above, the heating cooker according to the present invention performs exhaust heat treatment such as cooling and dehumidification on exhaust gas generated during cooking, and then discharges it outside the casing, so that the user of the heating cooker can compare. Even if it is exposed to exhaust gas, the discomfort caused by the exhaust gas does not occur, so it can be applied to various uses of heating cookers.

DESCRIPTION OF SYMBOLS 1 Heat cooker 3 Case 4 Heat cooking means 5, 51 Waste heat treatment means 6 Cooking container 7 Upper heating means 8 Lower heating means 9 Microwave heating means 10 Outer 11 Door 12 Opening part 13 Heat-resistant glass floor 14 Near red tube heater DESCRIPTION OF SYMBOLS 15, 17 Far red tube heater 16, 18 Reflecting plate 19 Radiation port 20 Magnetron 21 Waveguide 23 Exhaust path 24 Purifying means 25 Air-cooled heat exchanger 26 Water tank part 28 Exhaust ventilation means 29 Case exhaust port 30 Catalyst heating means 31 Purification catalyst 33, 54 Upstream header 34, 60 Downstream header 35, 55, 59 Heat transfer tube 46 Blower passage 47 Housing suction port 48 Blower means 52 Air-cooled heat exchanger 53 Regenerative heat exchanger

Claims (8)

A cooking container capable of storing cooking ingredients;
Heating means for heating cooking ingredients stored in the cooking container;
An exhaust passage communicating with the cooking vessel;
Exhaust heat treatment means for performing exhaust heat treatment such as cooling and dehumidification of the exhaust gas generated in the cooking vessel formed in the exhaust passage,
A housing including the cooking container, the heating means and the exhaust passage;
With
An air passage that communicates the housing suction port and the housing exhaust port that are opened in the housing, and that is provided with air blowing means;
A cooking device in which the exhaust heat treatment means is faced in the air passage. The cooking device according to claim 1, wherein the heating means faces the air passage. The heating cooker according to claim 1, wherein the waste heat treatment means is provided with a heat storage type heat exchanger. The cooking device according to any one of claims 1 to 3, wherein the heating means is provided with a magnetron that generates microwaves. 5. The heating cooker according to claim 4, wherein the air passage has air blowing means on the housing suction port side, magnetron in the middle, and heat treatment means on the housing exhaust port side. The cooking device according to any one of claims 1 to 4, wherein the housing suction port and the housing exhaust port are spaced apart from each other so as to sandwich the cooking container and are opened on the front surface of the housing. The cooking apparatus according to any one of claims 1 to 6, wherein the exhaust heat treatment means is provided with a purification means comprising a purification catalyst and a catalyst heating means in an exhaust passage downstream of the cooking vessel. The cooking device according to any one of claims 1 to 6, wherein the exhaust passage is provided with an exhaust air blowing means for sucking air from the cooking container.

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