JP2005249289A - Heating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating device for performing vapor heating without irregular heating while utilizing the property of vapor for multistage heating of objects to be heated. <P>SOLUTION: The vapor is blown out of a plurality of vapor outlets 8, 9 into a heating chamber 3 by a vapor generating means 12. The objects 2 to be heated are heated by the vapor and heating means 6, 7 in the heating chamber 3. Particularly, the vapor is blown out of the plurality of vapor outlets 8, 9 into the heating chamber 3 for vapor heating without irregular heating while utilizing the property of the vapor for the multistage heating of the objects 2 to be heated. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a heating apparatus such as a cooking apparatus that heats an object to be heated using high-temperature steam and heating means.

Conventionally, as this type of heating device, high-temperature steam is supplied to a heating chamber containing an object to be heated, and the high-temperature steam and heating means in the heating chamber are used in combination to heat the object to be heated. An apparatus is known (see, for example, Patent Document 1).
JP 2003-307310 A

  However, in the conventional configuration, since the supply of the high temperature steam to the heating chamber is performed from the jet outlet at the tip of the heating pipe, the steam is supplied only to a specific region, and a large amount of an object to be heated is heated. May cause uneven heating. In particular, when the object to be heated is stored and heated in a plurality of stages in the heating chamber, uneven heating is more likely to occur. This can be improved somewhat by stirring the steam in the heating chamber with a fan, but it is difficult to reliably eliminate the occurrence of heating unevenness.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object thereof is to provide a heating apparatus capable of performing steam heating without heating unevenness by utilizing the characteristics of steam even in multistage heating of an object to be heated.

  In order to solve the above-mentioned conventional problems, the heating device of the present invention blows off steam from the steam generating means to the heating chamber from a plurality of steam outlets, and is heated by the steam and the heating means in the heating chamber. Things are heated.

  Thereby, in particular, the steam is blown out from the plurality of steam outlets to the heating chamber, and steam heating without unevenness in heating can be performed by utilizing the characteristics of the steam even in the multistage heating of the object to be heated.

  In particular, the heating device of the present invention can perform steam heating without heating unevenness even in multistage heating of an object to be heated.

  1st invention is a heating chamber which accommodates a to-be-heated material, a steam generation means which generates the steam supplied into the heating chamber, and a plurality of steam outlets which blow the steam from the steam generation means into the heating chamber And heating means for heating the air and steam in the heating chamber and the object to be heated, and a heating apparatus for heating the object to be heated by the steam from the plurality of steam outlets and the heating means. Thus, in particular, the steam is blown out from the plurality of steam outlets to the heating chamber, and steam heating without unevenness of heating can be performed by utilizing the characteristics of the steam even in the multistage heating of the object to be heated.

  In particular, the second invention has a steam heating means for heating the steam generated from the steam generating means in the first invention, so that multi-stage heating using superheated steam at 100 ° C. or more from a plurality of steam outlets is performed. It is possible to widen the heating range.

  In a third aspect of the invention, in particular, in the first or second aspect of the invention, the steam outlet includes at least a first steam outlet that blows steam into the upper space of the heating chamber and steam in the lower space of the heating chamber. Since the second steam outlet is provided, the steam can be blown into the heating chamber without any unevenness, so that uneven heating can be eliminated in multi-stage heating.

  In a fourth aspect of the invention, in particular, in any one of the first to third aspects of the invention, the steam generating means can change the amount of generated steam, thereby selecting the amount of steam according to the amount of the object to be heated. Therefore, it is possible to perform optimum steam heating according to the amount of the object to be heated.

  In the fifth aspect of the invention, in particular, in the second aspect of the invention, the steam heating means can vary the steam temperature, so that the steam temperature can be varied according to the steam blowing conditions and the state of the heating chamber. Therefore, steam heating according to various kinds of objects to be heated can be performed, and the state after the objects to be heated can be kept constant.

  According to a sixth aspect of the invention, in particular, in the third aspect of the invention, the steam generating means is configured to change the ratio of the amount of steam blown from the first steam blower outlet and the second steam blower outlet. Depending on the amount of heated material and the flow of steam during heating, the ratio of the amount of steam between the first steam outlet and the second steam outlet can be varied to simultaneously heat the objects to be heated placed in multiple stages. In addition to being able to finish without unevenness, it is possible to keep the heated state of the article to be heated constant.

  In the seventh invention, in particular, in the third or sixth invention, the amount of steam blown from the second steam outlet is larger than the amount of steam blown from the first steam outlet, Since the heating utilizing the characteristics of the vapor rising upward can be performed, the heating time in the multi-stage heating can be shortened.

  In an eighth aspect of the invention, in particular, in the third or sixth aspect of the invention, the steam temperature blown from the second steam outlet is higher than the steam temperature blown from the first steam outlet, Since the heating utilizing the characteristics of the vapor rising upward can be performed, the heating time in the multi-stage heating can be shortened.

  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 and 2 illustrate a cooking device as a heating device in the embodiment of the present invention.

  As shown in the drawing, a main body 1 of a heating apparatus incorporates a heating chamber 3 for storing an object 2 to be heated. Although not shown, the heating chamber 3 is provided with a door for taking in and out the article 2 to be heated. In addition, the heating chamber 3 is equipped with at least two mounting members 4a and 4b on which the object to be heated 2 is mounted so that the object to be heated 2 can be heated in multiple stages.

  In addition, an airflow generating means 5 faces the heating chamber 3 so that an airflow is generated in the heating chamber 3. And the 1st heating means 6 and the 2nd heating means 7 are equipped with the upper part and the lower part in the heating chamber 3, respectively, and heat the air and vapor | steam in the heating chamber 3, and the to-be-heated material 2.

  Further, the heating chamber 3 includes a plurality of steam outlets for blowing steam into the heating chamber 3, that is, in the present embodiment, at least the first steam outlet 8 and the second steam outlet 9 are vertically arranged. Is equipped with two stages. The first steam outlet 8 and the second steam outlet 9 are configured to blow steam to the upper space and the lower space, respectively. In addition, a first detection means 10 for detecting the atmospheric temperature of the heating chamber 3 and the temperature of the object to be heated 2 is provided at an upper position inside the heating chamber 3. In addition, the 2nd detection means 11 which detects the temperature of the vapor | steam blown out in the 1st steam blower outlet 8 is provided.

  The steam generating means 12 that generates steam to be supplied into the heating chamber 3 includes a water storage means 13, a water heating means 14 disposed in the water storage means 13, and a steam pipe 15 through which the generated steam passes. Yes. The steam pipe 15 includes a steam heating unit 16 that heats the steam generated from the steam generation unit 12 to form superheated steam, and a steam temperature detection unit 17 that detects the temperature of the steam heated by the steam heating unit 16. .

  The steam pipe 15 includes a steam pipe 15a communicating with the first steam outlet 8 and a steam pipe 15b communicating with the second steam outlet 9, and the diameter of the steam pipe 15b is larger than that of the steam pipe 15a. Is set. The diameters of the steam pipe 15a and the steam pipe 15b can be appropriately changed and combined.

  The first steam outlet 8 and the second steam outlet 9 are respectively provided with a blow direction changing means 8a and a blow direction changing means 9a for changing the direction of the steam blown into the heating chamber 3. By using these blowing direction variable means 8 a and 9 a, it is possible to deflect and blow steam in an arbitrary direction in the heating chamber 3. The object to be heated 2 is heated by using the steam from the plurality of steam outlets 8 and 9 in combination with the heating means 6 and 7 or by using one of them.

  Air and steam in the heating chamber 3 are discharged from the discharge port 18. Discharge port opening / closing means 18 a is disposed at the discharge port 18. If the discharge port 18 is arranged in the vicinity of the first steam outlet 8 or the second steam outlet 9, the steam may be discharged from the outlet 18 before the heating chamber 3 is filled with steam. Therefore, in the present embodiment, the discharge port 18 is disposed separately from the first steam outlet 8 and the second steam outlet 9.

  The control means 19 includes operation input signals from various heating operation keys 20 or heating keys 21 from an operation unit (not shown) of the heating device, a first detection means 10, a second detection means 11, and a steam temperature detection. Based on signals from the means 17 and the like, the operation of the airflow generation means 5, the first heating means 6, the second heating means 7, the steam generation means 12, the steam heating means 16 or the blowing direction variable means 8a and 9a is controlled. Operation input signals, heating conditions, control conditions, and the like are temporarily or permanently stored in the storage unit 22.

  Next, operation | movement and an effect | action are demonstrated about the heating apparatus of the said structure.

  When the heating of the article 2 to be heated is started by operating the operation unit, the control unit 19 energizes the first heating unit 6, the second heating unit 7, the steam generation unit 12, and the steam heating unit 16. The water heating means 14 of the steam generating means 12 heats the water of the water storage means 13. The amount of steam generated in the steam generating means 12 can be controlled by varying the input power of the water heating means 14. The water heated by the water heating means 14 becomes steam and passes through the steam pipe 15. The steam passing through the steam pipe 15 flows separately into the steam pipe 15a and the steam pipe 15b. Since the steam pipe 15a and the steam pipe 15b have different diameters, the steam flows in a large amount toward the thick diameter, that is, the steam pipe 15b. The ratio of the amount of steam flowing to the steam pipe 15a and the steam pipe 15b can be changed by changing the thickness or combination of the steam pipe 15a and the steam pipe 15b or by adjusting the flow resistance with a separate flow resistance member. .

  The control means 19 measures the steam temperature based on the detection signals from the second detection means 11 and the steam temperature detection means 17. After the steam generated by the steam generating means 12 passes through the steam pipe 15, the steam is blown out from the first steam outlet 8 and / or the second steam outlet 9 into the heating chamber 3. The steam blowing direction can be freely changed by the blowing direction changing means 8a and 9a.

  When the steam temperature used for heating is up to 100 ° C., the steam heating means 16 does not operate. On the other hand, when the steam temperature used for heating is 100 ° C. or higher, the generated steam is heated to an arbitrary temperature by the steam heating means 16 when passing through the steam pipe 15 and becomes superheated steam. The temperature of the superheated steam may be set from the operation unit, or in the case of automatic cooking, the steam temperature stored in advance in the storage means 22 may be used as a reference. Based on detection signals from the second detection means 11 and the steam temperature detection means 17, the steam temperature is measured by the control means 19 over time. The control means 19 controls the steam generating means 12 and the steam heating means 16 based on the detection signal, and varies the generated steam amount and the steam temperature. The steam heating means 16 is disposed near the steam pipe 15b, and has a configuration in which the steam temperature blown from the steam pipe 15b is higher than the steam temperature blown from the steam pipe 15a. Yes.

  When heating the article 2 to be heated, not only the steam blown into the heating chamber 3 but also the first heating means 6 and / or the second heating means 7 are used in combination. When the steam and the first heating means 6 and / or the second heating means 7 are used in combination, the airflow generation means 5 is also operated.

  Here, the effect of the steam blown into the heating chamber 3 will be described.

  When the heated object 2 is lower in temperature than its own temperature, the steam condenses and condenses on the surface of the heated object 2, and at that time, has a characteristic of giving condensation heat to the heated object 2. Steam condensation continues until the surface temperature of the article 2 to be heated reaches 100 ° C., and the condensation ends when the surface temperature exceeds 100 ° C. Since the heat of condensation is larger than the heat of conduction from the air, the temperature of the article to be heated 2 is increased quickly. Therefore, in the initial stage of heating, control is required to increase the use of steam condensation heat in order to accelerate the temperature rise of the article 2 to be heated.

  Next, an example of control is shown below. In the case of steaming cooking, the steam temperature is adjusted to around 100 ° C., and the amount of steam blown out in the whole heating process can shorten the heating time. In the case of baked cooking, the amount of steam is increased in the initial stage of heating to increase the heat of condensation on the article 2 to be heated, but in the latter stage of heating, in order to dry the surface of the article to be heated 2 And the first heating means 6 and the second heating means 7 are used for heating. As described above, the heating of the object to be heated 2 is appropriately performed using a combination of steam and heating means, or any one of them as necessary. It is not limited to combined use.

  Next, the flow of steam blown into the heating chamber 3 will be described.

  The steam blown into the heating chamber 3 flows upward of the heating chamber 3. The steam gives heat of condensation to the object to be heated 2 when flowing upward. Thereby, when steam blows out from the lower side of the article to be heated 2, the steam can be efficiently applied to the article to be heated 2. On the other hand, in the multistage heating, the blown-out steam is condensed on the surface of the heated object 2 placed on the lower placement member 4b. The steam that has not condensed on the lower article to be heated 2 flows upward in the heating chamber 3. Therefore, the amount of steam hitting the object to be heated 2 placed on the upper stage is small, and the condensation heat given to the object to be heated 2 is also small. Therefore, by blowing out the steam from the first steam outlet 8, it is possible to make up for the steam that is insufficient for heating with only the steam from the second steam outlet 9. Thereby, the heating nonuniformity in the vapor | steam heating of each to-be-heated material 2 mounted in multiple stages can be eliminated.

  Next, the amount of steam blown into the heating chamber 3 will be described.

  The steam blown into the heating chamber 3 flows above the heating chamber 3. When the amount of steam blown from the first steam outlet 8 and the second steam outlet 9 is the same, or when the amount of steam blown from the first steam outlet 8 is larger than that of the second steam outlet 9 Since the steam accumulates in the upper layer of the heating chamber 3, a large amount of condensation heat is transmitted to the heated object 2 placed in the upper layer, but the heated object 2 placed in the lower layer of the heating chamber 3 Is difficult to hit, and uneven heating in the height direction at the mounting position of the heating chamber 3 occurs. This makes it possible to eliminate uneven heating by increasing the amount of steam blown from the second steam outlet 9 to be larger than the amount of steam blown from the first steam outlet 8.

  Next, the temperature of the steam blown into the heating chamber 3 will be described.

  The steam blown into the heating chamber 3 flows above the heating chamber 3. When the steam temperature blown from the first steam outlet 8 and the second steam outlet 9 is the same, or when the steam temperature blown from the first steam outlet 8 is higher than the second steam outlet 9, Since the object to be heated 2 placed on the upper layer of the heating chamber 3 transmits more heat of condensation than the object to be heated 2 placed on the lower layer of the heating chamber 3, uneven heating occurs. The heating unevenness can be eliminated by making the steam temperature blown from the second steam blower outlet 9 higher than the steam temperature blown from the first steam blower outlet 8.

  In the present embodiment, the two-stage heating of the article to be heated 2 has been described. In addition, an arbitrary interval can be selected between the mounting member 4a and the mounting member 4b. The mounting members 4a and 4b are plate-like in the present embodiment, but may be net-like, linear or other. A material having a heat insulating effect can be used in combination around the heating chamber 3. Further, the operation unit is provided with a display unit, an automatic heating operation key, a manual heating setting key, a heating start key, and the like.

  Moreover, when using a steam generation means different from the steam generation by the water heating means 14, a method of generating a steam by supplying a certain amount of water in a water storage means separately provided by a water supply means or the like may be used.

  Moreover, you may provide the detection means which measures the temperature of the steam which blows off from the 2nd steam blower outlet 9 separately. As the first and second heating means 6 and 7, any means such as a heater or a microwave may be used in combination.

  Further, the first and second steam outlets 8 and 9 can change the ratio of the steam to be blown out by changing the opening area thereof.

  Furthermore, in the present embodiment, the steam pipe 15a and the steam pipe 15b are branched from the steam pipe 15, but the steam is separately provided to each of the first steam outlet 8 and the second steam outlet 9. A tube and steam heating means may be provided. In this case, the steam generation amount can be controlled by a valve, water supply means, variable opening area, or the like.

  With this embodiment, even in a convection oven using steam, steam heating can be performed while preventing a drop in steam temperature due to the introduction of outside air.

  As described above, the heating device according to the present invention can perform steam heating without heating unevenness even in multi-stage heating of an object to be heated, so that it is combined with a microwave oven, an microwave oven, an oven, a griller, or the like. The present invention can also be applied to multi-function cooking devices, drying devices, and high-speed heat treatment devices other than foods.

Sectional drawing of the heating apparatus in embodiment of this invention Main part block diagram of control means in the heating apparatus

Explanation of symbols

2 Object to be heated 3 Heating chamber 6 First heating means (heating means)
7 Second heating means (heating means)
8 First steam outlet (steam outlet)
9 Second steam outlet (steam outlet)
12 Steam generating means 16 Steam heating means 19 Control means

Claims (8)

A heating chamber for storing an object to be heated; steam generating means for generating steam to be supplied into the heating chamber; a plurality of steam outlets for blowing steam from the steam generating means into the heating chamber; A heating device comprising heating means for heating air and steam and the object to be heated, and heating the object to be heated by the steam from the plurality of steam outlets and the heating means. The heating apparatus according to claim 1, further comprising a steam heating unit that heats the steam generated from the steam generation unit. The steam outlet comprises at least a first steam outlet for blowing steam into the upper space of the heating chamber and a second steam outlet for blowing steam into the lower space of the heating chamber. The heating device according to 1. The heating apparatus according to any one of claims 1 to 3, wherein the steam generating means is configured to be able to vary a generated steam amount. The heating apparatus according to claim 2, wherein the steam heating means can change a steam temperature. The heating apparatus according to claim 3, wherein the steam generating means is configured to vary a ratio of a steam amount blown from the first steam blower outlet and the second steam blower outlet. The heating device according to claim 3 or 6, wherein the amount of steam blown from the second steam outlet is larger than the amount of steam blown from the first steam outlet. The heating apparatus according to claim 3 or 6, wherein a steam temperature blown from the second steam blower outlet is higher than a steam temperature blown from the first steam blower outlet.

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