JP4943234B2 - Fluid temperature raising device and cooking device - Google Patents

Description

  The present invention relates to a cooking device that cooks an object to be heated with steam. The present invention also relates to a fluid temperature raising device that raises the temperature of a fluid such as steam by electromagnetic induction heating.

  A conventional cooking device is disclosed in Patent Document 1. FIG. 6 is a side sectional view showing the cooking device. A cooking device 1 having a heating chamber 2 includes a steam generator 3 that generates steam and a fluid temperature increasing device 10 that raises the temperature of the steam. The steam generator 3 is filled with an adsorbent 7 having water absorption in a cylindrical outer cylinder 11. The adsorbent 7 is mixed with iron powder, and the iron powder generates heat by electromagnetic induction when the coil 8 wound around the outer cylinder 11 is energized. Thereby, the water contained in the adsorbent 7 is evaporated to generate steam.

  The fluid temperature raising device 10 has a honeycomb-shaped heating element 12 in an outer cylinder 11 common to the steam generator 3, and the heating element 12 generates heat by electromagnetic induction of a coil 13 wound around the outer cylinder 11. . The steam generated by the steam generator 3 is heated by exchanging heat with the heating element 12 by the fluid temperature raising device 10 and is sent to the heating chamber 2 as superheated steam. Thereby, the to-be-heated object W in the heating chamber 2 is cooked.

  The heating chamber 2 and the steam generator 3 are communicated by a duct 5, and a blower 6 that guides the steam in the heating chamber 2 to the steam generator 3 through the duct 5 is provided. By driving the blower 6, the steam in the heating chamber 2 passes through the steam generator 3, and the temperature of the steam is increased through the fluid temperature increasing device 10 together with the steam generated in the steam generator 3. Thereby, the temperature in the heating chamber 2 can be circulated to raise the temperature, and the heating efficiency of cooking can be improved.

Japanese Patent No. 2792432 (pages 4-7, FIG. 2) Japanese Patent No. 3545014 (pages 3-5, FIG. 2)

  However, according to the conventional cooking device, the fluid temperature raising device 10 includes the outer cylinder 11 disposed inside the coil 13 and the heating element 12 disposed inside the outer cylinder 11. Thereby, since the heat generating body 12 becomes small, the surface area is small and the watt density of the heat generating body 12 is increased. As a result, the surface temperature of the heating element 12 is increased, which causes problems such as damage to the coating due to overheating of the coil 13 and failure due to heat of surrounding members. Moreover, when the heating element 12 is enlarged to reduce the watt density, there is a problem that the fluid temperature raising device 10 and the heating cooker 1 become large.

  An object of this invention is to provide the fluid temperature rising apparatus and heating cooker which can achieve size reduction with a small watt density.

  In order to achieve the above object, the present invention provides a heating chamber for storing an object to be heated, a steam generator for generating steam for heating the object to be heated, and a fluid riser for increasing the temperature of steam generated by the steam generator. A heating cooker for heating and cooking an object to be heated by supplying steam heated by the fluid heating device to the heating chamber, wherein the fluid heating device is an outer cylinder through which steam flows And a coil disposed inside the outer cylinder, and a heating element disposed between the outer cylinder and the coil and electromagnetically heated by applying a high frequency voltage to the coil. It is a feature.

  According to this configuration, the steam generated by the steam generator flows into the outer cylinder of the fluid temperature raising device. The heating element disposed outside the coil generates heat by energization of the coil disposed in the outer cylinder, and exchanges heat with the steam flowing in the outer cylinder. Thereby, steam is heated up to a desired temperature and sent to the heating chamber.

  Moreover, the present invention is characterized in that in the cooking device having the above-described configuration, a liquid flow path through which water flows is provided inside the coil. According to this configuration, the coil is cooled by the water flowing through the liquid flow path.

  Moreover, the present invention is characterized in that, in the cooking device having the above-described configuration, the water flowing through the liquid flow path is collected in the steam generator. According to this configuration, water that has flowed through the liquid flow path and cooled the coil is collected by the steam generator, and steam is generated by heating the collected water.

  According to the present invention, in the cooking device having the above-described configuration, a recovery passage for guiding the water flowing through the liquid flow path to the steam generator is provided between the coil and the heating element. According to this configuration, the coil is cooled from the inside by the water flowing through the liquid flow path, and is cooled from the outside by the water flowing through the recovery passage.

  According to the present invention, in the cooking device configured as described above, the lower end of the outer cylinder is closed, and the steam generator circulates through the liquid flow path to heat water stored in the lower part of the outer cylinder to generate steam. It is characterized by generating. According to this configuration, the steam generator has an outer cylinder common to the fluid temperature raising device, and is integrally provided below the fluid temperature raising device. The water flowing through the liquid flow path is stored in the lower part of the outer cylinder whose lower end is blocked, and the steam generator heats the stored water to generate steam.

  Moreover, the present invention is characterized in that, in the heating cooker having the above-described configuration, the heating element is immersed in water stored in the steam generator, and water is evaporated by the heating element. According to this configuration, the steam generator has a common heating element with the fluid temperature raising device, and generates steam and raises the temperature of steam by the heat generated by the heating element.

  Moreover, the fluid temperature raising device of the present invention is arranged between the outer cylinder through which the fluid flows, the coil arranged inside the outer cylinder, the outer cylinder and the coil, and applies a high frequency voltage to the coil. And a heating element that is heated by electromagnetic induction when applied, and the fluid supplied to the outer cylinder is heated and discharged by heat exchange with the heating element.

  According to the present invention, in the fluid temperature increasing apparatus having the above-described configuration, a liquid flow path through which a coolant flows is provided inside the coil.

  According to the present invention, in the fluid temperature increasing device having the above-described configuration, the outer cylinder has a steam generation unit that recovers and evaporates the coolant flowing through the liquid flow path, and the steam generated in the steam generation unit The temperature is raised by the heating element.

  Further, the present invention is characterized in that, in the fluid temperature increasing device configured as described above, a recovery passage for guiding the coolant flowing through the liquid flow path to the vapor generating section is provided between the coil and the heating element. .

  According to the present invention, in the fluid temperature increasing device configured as described above, the steam generating unit evaporates the recovered coolant by the heating element.

  According to the present invention, the fluid temperature raising apparatus has a coil in the outer cylinder, and the heating element is arranged between the outer cylinder and the coil. Therefore, a larger heating element than the arrangement of the coil outside the outer cylinder is provided. Can be provided. For this reason, even if it is a small fluid temperature rising apparatus, the surface area of a heat generating body can be enlarged, the watt density of a heat generating body can be reduced, and surface temperature can be lowered | hung. Therefore, damage to the coating due to overheating of the coil, failure due to heat of members disposed around the fluid temperature raising device, and the like can be prevented.

  According to the present invention, since the liquid flow path through which water flows is provided inside the coil, the coil can be cooled to further prevent damage to the coating due to overheating of the coil.

  Further, according to the present invention, since the water flowing through the liquid flow path is collected in the steam generator, the water heated by the steam generator is preheated by the coil. Therefore, the heating efficiency of the steam generator can be improved.

  Further, according to the present invention, since the recovery passage for guiding the water flowing through the liquid flow path to the steam generator is provided between the coil and the heating element, the water heated by the steam generator is preheated to a higher temperature by the coil. . Therefore, the heating efficiency of the steam generator can be further improved.

  Further, according to the present invention, the lower end of the outer cylinder is closed, and the steam generator circulates through the liquid flow path to heat the water stored in the lower part of the outer cylinder to generate steam. The temperature device can be integrated to reduce the number of parts, and the heating cooker can be further downsized.

  Further, according to the present invention, since the steam generator evaporates water by the heating element common to the fluid temperature raising device, the number of parts can be reduced. Moreover, heating control of the steam generator and the fluid temperature raising device can be simplified.

  Embodiments of the present invention will be described below with reference to the drawings. For convenience of explanation, the same reference numerals are given to the same parts as in the conventional example shown in FIG. Drawing 1 is a lineblock diagram showing the cooking-by-heating machine of a 1st embodiment. The heating cooker 1 cooks an object to be heated with a heating medium made of superheated steam. The heating cooker 1 has a heating chamber 2 that accommodates the article to be heated W, and a fluid temperature raising device 10 that generates steam and raises the temperature is provided on the side of the heating chamber 2.

  An outlet 10 a through which steam flows out from the fluid temperature raising device 10 is connected to the top surface of the heating chamber 2 by a duct 21. A blower 6 is arranged in the lower part of the heating chamber 2 and a duct 22 is led out. The duct 22 is connected to the lower part of the fluid temperature raising device 10, and a damper 23 is provided inside.

  2 and 3 are a longitudinal sectional view and a transverse sectional view showing the fluid temperature raising device 10. The fluid temperature raising device 10 is provided with a ferromagnetic material 17 such as ferrite outside an outer cylinder 11 made of an insulator. A cylindrical partition portion 18 whose upper surface is closed is provided inside the outer tube 11. A heating element 12 made of a magnetic conductor is disposed between the outer cylinder 11 and the partition portion 18. The heating element 12 is made of honeycomb metal, metal wool, or the like, and has air permeability.

  A liquid channel 14 through which water supplied from a water tank (not shown) circulates is provided inside the partition portion 18. A coil 13 is wound around the liquid flow path 14. A recovery passage 15 is formed between the coil 13 and the partition portion 18 to guide the water flowing through the liquid flow path 14 downward.

  The lower end of the outer cylinder 11 is closed, and a heater 9 is provided on the bottom surface. The water flowing through the liquid passage 14 and the recovery passage 15 is stored in the lower part of the outer cylinder 11 and heated by the heater 9. Thereby, the steam generation part 3 which generate | occur | produces a steam is provided in the outer cylinder 11. FIG. That is, the steam generator for generating steam and the fluid temperature increasing device 10 for heating the generated steam are integrally formed. Thereby, while being able to reduce a number of parts, size reduction of the heating cooker 1 can be achieved. The duct 22 is connected above the liquid level of the steam generating unit 3.

  When a high frequency voltage is applied to the coil 13, a magnetic field is generated. The magnetic flux passing outside the outer cylinder 11 passes through the ferromagnetic body 17, and leakage of the magnetic field is prevented. The magnetic flux passing through the inside of the outer cylinder 11 passes through the heating element 12 made of a magnetic material. As a result, an induction current flows through the heating element 12 to generate an eddy current therein, and heat is generated by Joule heat. Moreover, since the heat generating body 12 consists of magnetic bodies, it is heated also by hysteresis loss.

  In the heating cooker 1 configured as described above, a water tank (not shown) is mounted in a full state, and the article to be heated W is arranged in the heating chamber 2. When cooking is started by selecting the cooking menu, water in the water tank is supplied from below the liquid flow path 14. The water flowing through the liquid flow path 14 rises and is guided downward on the upper surface of the partition 18, flows down through the recovery passage 15, and is recovered by the steam generator 3. When the heater 9 is energized, the water in the steam generator 3 evaporates and steam is generated.

  The steam generated in the steam generating unit 3 flows between the outer cylinder 11 and the partition unit 18 by the steam pressure and exchanges heat with the heating element 12. As a result, superheated steam having a predetermined temperature (for example, 150 ° C. to 300 ° C.) is generated and flows into the heating chamber 2 through the outlet 10 a and the duct 21.

  When the damper 23 is opened and the blower 6 is driven, the steam in the heating chamber 2 is guided to the fluid temperature raising device 10 through the duct 22. And the vapor | steam which distribute | circulated between the outer cylinder 11 and the partition part 18 and was heated up is sent in the heating chamber 2 via the duct 21, and the vapor | steam in the heating chamber 2 circulates. Thereby, the article W to be heated is cooked.

  According to the present embodiment, the fluid temperature raising device 10 has the coil 13 in the outer cylinder 11, and the heating element 12 is disposed between the outer cylinder 11 and the coil 13, so that the coil 13 is disposed outside the outer cylinder 11. It is possible to provide a heating element 12 that is larger than the arrangement of. For this reason, even if it is the small fluid temperature rising apparatus 10, the surface area of the heat generating body 12 can be enlarged, the watt density of the heat generating body 12 can be reduced, and the surface temperature can be lowered. Therefore, damage to the coating due to overheating of the coil 13 and failure due to heat of members disposed around the fluid temperature raising device 10 can be prevented.

  Further, since the liquid flow path 14 through which water flows is provided inside the coil 13, the coil 13 can be cooled to further prevent damage to the coating due to overheating of the coil 13.

  In addition, since the water flowing through the liquid flow path 14 is collected in the steam generating unit 3 (steam generating device), the water heated in the steam generating unit 3 is preheated by the coil 13. Therefore, the heating efficiency of the steam generation unit 3 can be improved.

  In addition, since the recovery passage 15 for guiding the water flowing through the liquid flow path 14 to the steam generation unit 3 is provided between the coil 13 and the heating element 12, the water recovered in the steam generation unit 3 Preheated when circulating outside. For this reason, the water heated by the steam generation part 3 can be preheated to higher temperature, and the heating efficiency of the steam generation part 3 can further be improved.

  Next, FIG. 4 is a block diagram showing the heating cooker of the second embodiment. For convenience of explanation, the same reference numerals are given to the same parts as those in the first embodiment shown in FIGS. In the present embodiment, the heater 9 (see FIG. 2) of the first embodiment is omitted, and the heating element 12 is extended to the vicinity of the bottom surface of the outer cylinder 11. Other parts are the same as those in the first embodiment.

  The heating element 12 is immersed in the water of the steam generation unit 3 stored at the bottom of the outer cylinder 11, and the heating element 12 heats the water of the steam generation unit 3 to generate steam. That is, the heating means for generating steam and the heating means for raising the temperature of the steam are formed of a common heating element 12.

  According to this embodiment, the same effect as that of the first embodiment can be obtained. In addition, since the steam generator 3 (steam generator) evaporates water by the heating element 12 common to the steam temperature raising unit of the fluid temperature raising device 10, the number of parts can be reduced. Moreover, heating control of the steam generator and the fluid temperature raising device 10 can be simplified.

  Next, FIG. 5 is a block diagram showing a heating cooker of the third embodiment. For convenience of explanation, the same reference numerals are given to the same parts as those in the first embodiment shown in FIGS. In the present embodiment, the steam generator 26 is separated from the fluid temperature raising device 10 in place of the steam generator 3 (see FIG. 2) of the first embodiment. Other parts are the same as those in the first embodiment.

  The steam generator 26 is connected to a drain pipe 27 led out from the bottom surface of the outer cylinder 11 of the fluid temperature raising device 10. A heater 9 is disposed in the steam generator 26 to heat the water in the steam generator 26.

  The duct 22 connecting the heating chamber 2 and the fluid temperature raising device 10 has a branch path 22a branched in the middle of the path, and the branch path 22a is connected to the upper part of the steam generator 26. Further, a damper 28 is provided in the duct 22 to switch the inflow path to the fluid temperature raising device 10 between the steam generator 26 side and the heating chamber 2 side.

  In the heating cooker 1 having the above-described configuration, the water flowing through the liquid flow path 14 and the recovery passage 15 is recovered by the steam generation device 26 through the drain pipe 27. The water in the steam generator 26 is heated by the heater 9 to generate steam. The damper 28 is switched to the steam generator 26 side, and the steam generated by the steam generator 26 is supplied to the fluid temperature raising device 10. Further, when the damper 28 is switched to the heating chamber 2 side and the blower 6 is driven, the steam in the heating chamber 2 circulates.

  According to this embodiment, since the fluid temperature raising device 10 is separated from the steam generator 26, the number of parts is increased as compared with the first embodiment, but the surface area of the heating element 12 can be increased to reduce the watt density. .

  In the first to third embodiments, the liquid flow path 14 may be filled with metal wool or the like, and water may be supplied from the water tank to the fluid temperature raising device 10 by osmotic pressure. Alternatively, water may be supplied to the liquid flow path 14 from above and the water may be recovered to the lower steam generation unit 3 or the steam generation device 26. At this time, although the amount of preheating by the coil 13 is reduced, the heating element 12 can be made larger by omitting the partition 18 and the recovery passage 15. Alternatively, the liquid flow path 14 may be omitted and water may be supplied from the water tank to the steam generating unit 3 or the steam generating device 26 via a duct.

  Moreover, although the heating cooker 1 is demonstrated in the 1st-3rd embodiment, you may provide the fluid temperature rising apparatus 10 in another apparatus. The fluid flowing through the outer cylinder 11 may be water vapor or other gas, or water or other liquid. For example, the fluid temperature raising device 10 can be provided in a water heater, a boiler or the like and used for raising the temperature of water or steam.

  At this time, the steam (including other than water vapor) generated by the steam generating unit 3 may be heated by the fluid temperature increasing device 10 as in the first and second embodiments. Further, as in the third embodiment, the temperature of the liquid or gas may be raised by the fluid temperature raising device 10 without the vapor generating unit 3.

  INDUSTRIAL APPLICABILITY The present invention can be used in a cooking device that cooks an object to be heated with steam. In addition, the present invention can be used for a water heater, a boiler or the like provided with a fluid temperature raising device for raising the temperature of a fluid.

The block diagram which shows the heating cooker of 1st Embodiment of this invention. The longitudinal cross-sectional view which shows the fluid temperature rising apparatus of the heating cooker of 1st Embodiment of this invention The cross-sectional view which shows the fluid temperature rising apparatus of the heating cooker of 1st Embodiment of this invention The block diagram which shows the heating cooker of 2nd Embodiment of this invention. The block diagram which shows the heating cooker of 3rd Embodiment of this invention. Side surface sectional drawing which shows the heating cooker of conventional embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heating cooker 2 Heating chamber 3 Steam generating part 6 Blower 9 Heater 10 Fluid temperature rising device 11 Outer cylinder 12 Heating element 13 Coil 14 Liquid flow path 15 Recovery path 17 Ferromagnetic body 18 Partition part 21, 22 Duct 23, 28 Damper 26 Steam generator 27 Drain pipe W Heated object

Claims (5)

An outer cylinder through which a fluid flows, a coil disposed inside the outer cylinder, a heat generated by electromagnetic induction heating by applying a high-frequency voltage to the coil while being disposed between the outer cylinder and the coil And the fluid supplied into the outer cylinder is heated and discharged by heat exchange with the heating element ,
A liquid channel through which a liquid flows is provided inside the coil, and the coil is wound around the liquid channel,
Provided between the coil and the heating element is a recovery passage that guides the liquid to a vapor generation unit that evaporates the liquid flowing through the liquid flow path,
A fluid temperature raising apparatus characterized in that the temperature of steam generated by the steam generating part is raised by the heating element . Further comprising a cylindrical partition provided inside the outer cylinder,
The partition portion has an upper surface closed, and the heating element is provided between the outer cylinder and the partition portion,
The fluid temperature increasing device according to claim 1, wherein the recovery passage is formed between the coil and the partition portion. The fluid temperature raising apparatus according to claim 2, wherein the vapor heated by the heating element is circulated and discharged between the outer cylinder and the partition part. The lower end of the outer cylinder is closed, the vapor generating part stores the liquid flowing through the liquid flow path and the recovery passage in a lower part of the outer cylinder, and the heating element is stored in the liquid stored in the vapor generating part. The fluid temperature rising device according to claim 1, wherein the fluid heating device is immersed and the liquid is evaporated by the heating element. A heating chamber for storing the object to be heated; a steam generator for generating steam for heating the object to be heated; and a fluid temperature increasing device for increasing the temperature of the steam generated by the steam generating device. In the cooking device which cooks the to-be-heated material by supplying the heated steam into the heating chamber, the fluid temperature increasing device is the fluid temperature increasing device according to any one of claims 1 to 4. A cooking device characterized by.

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