JP2010038501A - Steam convection oven and its cleaning method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a steam convection oven and its cleaning method under consideration of cleaning of a steam generation tank. <P>SOLUTION: This steam convection oven 1 includes the steam generation tank 10 and a food cooking chamber 20 to which the generated steam is distributed. Further it includes a circulation system 30 for circulating hot water of the steam generation tank 10, and a cleaning agent charging system 40 for charging a cleaning agent to the circulation system 30. The circulation system is composed of an inside cleaning pipe conduit 31 for distributing the hot water in the steam generation tank 10 to a hot water spout 22 of the cooking chamber 20, and a temporary connecting pipe 33 connecting a steam supply opening 21 and the hot water spout 22. The cleaning agent is charged into the circulation system 30 from the cleaning agent charging system 40, and the hot water including the cleaning agent is circulated in the circulation system. As the hot water including the cleaning agent is stirred in the steam generation tank by this circulation, dirt of the tank 10 can be easily eliminated. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a steam convection oven that performs cooking using saturated steam and a cleaning method thereof. In particular, the present invention relates to a convection oven in consideration of cleaning of a steam generation tank.

The steam convection oven includes a tank that generates steam and a cooking chamber in which food to be cooked is stored, and steam generated in the steam generation tank is sent to the cooking chamber to heat and cook food. In such a steam convection oven, oil, boiled juice, etc. scatters from the food being cooked and adheres to the wall of the cooking cabinet and becomes dirty. Therefore, various methods for cleaning the inside of the cabinet have been proposed (see, for example, Patent Document 1). In this method, a detergent is applied to the wall surface, then steam is sprayed from the steam generator into the chamber to raise the dirt adhering to the wall surface, and then water is sprayed from the watering device into the chamber. It is common to wash away dirt that has floated.
Japanese Utility Model Publication No. 3-58223

On the other hand, since the steam generation tank is separated from the cooking chamber, it is not contaminated with oil or broth. However, since tap water is supplied and evaporates, minerals (calcium and magnesium) contained in the tap water adhere to the tank wall surface as a white powdery substance (also called chalk). Such substances are not harmful to the body, but it is preferable to clean the tank regularly. This hot water is hard to stick to the wall. As a cleaning method, for example, a cleaning solution is prepared by diluting a cleaning agent (for example, citric acid or phosphoric acid) so as to have a concentration of about 25%, and the cleaning solution is stored in a steam generation tank and is left overnight. Afterwards, it is common to drain and rinse. If the cleaning agent remains, the steam containing the cleaning agent spouts into the cabinet, so the tank needs to be rinsed sufficiently. For this reason, about 9 hours were required for a series of work.
In addition, the above-mentioned patent documents etc. propose only the cleaning of the inside of the warehouse, and are not referred to the cleaning of the steam generation tank.

  The present invention has been made in view of the above problems, and an object thereof is to provide a steam convection oven and a cleaning method thereof in consideration of cleaning of a steam generation tank.

  The steam convection oven of the present invention is a steam convection oven comprising a steam generation tank and a food cooking chamber to which the generated steam is sent, a circulation system for circulating hot water in the steam generation tank, and a cleaning agent in the circulation system And a cleaning agent charging system for charging.

Here, the cleaning agent is a liquid or powder that removes dirt, such as minerals (also called calcium, magnesium, or chalk) contained in tap water, stuck to the wall of the steam generation tank as a white powdery substance. is there.
According to the present invention, a circulation system for circulating hot water in a steam generation tank is formed, and a cleaning agent is introduced into this circulation system, and hot water containing the cleaning agent is circulated in the same system. This circulation stirs the hot water containing the cleaning agent in the steam generation tank, so that the dirt in the tank is easily removed. In the conventional method, since the cleaning agent is only stored in the steam generation tank and left to stand, it takes a long time to remove the dirt. According to the present invention, the cleaning agent is stirred in the tank. As a result, the cleaning time can be shortened and the amount of the necessary cleaning agent can be reduced.

  In the present invention, the circulation system includes an internal cleaning conduit that sends hot water from the steam generation tank to a hot water outlet at the upper part of the cooking chamber, and steam injection that blows steam from the steam generation tank into the storage. A temporary connecting pipe connecting the mouth and the spout.

  In a steam convection oven of the type in which the hot water outlet for cleaning the interior is provided in the cooking chamber, a temporary connecting pipe is connected to the hot water outlet, and the steam is circulated in the hot water circulation system containing the cleaning agent. The steam generation tank can be cleaned by stirring hot water containing a cleaning agent in the generation tank.

  Or the said circulation system can also have a pipe line which goes out from the bottom of the said steam generation tank, and enters into the upper part of this tank.

  In a steam convection oven of the type that does not have a spout for cleaning the inside of the cooking chamber, the cleaning agent is put into the pipeline that goes out from the bottom of the steam generation tank and enters the upper part of the tank. The hot water containing the cleaning agent is circulated in the circulation system, and the hot water containing the cleaning agent can be stirred in the steam generation tank.

  Alternatively, the circulation system includes an internal cleaning pipe that sends hot water from the steam generation tank to a spout at the upper part of the cooking chamber, and a branch pipe that extends from the internal cleaning pipe to the steam generation tank. And a switching valve provided at a branching portion of the internal cleaning pipeline to the branch pipeline.

  In the present invention, in a steam convection oven of a type in which a hot water outlet for cleaning the interior is provided in the cooking cabinet, a circulation system is formed that returns from the interior cleaning pipeline to the steam generation tank through the branch pipeline. In this case, the hot water containing the cleaning agent can be stirred in the steam generation tank by circulating the hot water containing the cleaning agent in the circulation system without attaching a temporary connection pipe to the spout. .

  The steam convection oven cleaning method of the present invention is a steam convection oven cleaning method including a steam generation tank and a food cooking chamber to which the generated steam is sent, and a circulation system for circulating hot water in the steam generation tank, A cleaning agent is added, and hot water containing a cleaning agent is circulated in the circulation system, whereby the hot water containing the cleaning agent is stirred in the steam generation tank, and the steam generation tank is cleaned. .

  As is clear from the above description, according to the present invention, hot water containing a cleaning agent is stirred in the steam generation tank to clean the tank, so that the cleaning time can be shortened and the detergent used The amount of can be reduced. The present invention can be applied to a type in which a hot water outlet for cleaning a cooking cabinet is provided or a type in which a hot water outlet is not provided.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram schematically showing the structure of a steam convection oven according to an embodiment of the present invention.
The steam convection oven 1 includes a tank 10 that generates steam and a cooking cabinet 20 in which food to be cooked is stored. A steam supply pipe 11 is provided between the steam generation tank 10 and the cooking cabinet 20. Further, the oven 1 is provided with a circulation system 30 for circulating hot water in the steam generation tank 10 and a cleaning agent charging system 40 for supplying a cleaning agent to the circulation system 30.

  A steam supply pipe 11 is connected to the upper surface of the steam generation tank 10. Further, a tap water supply pipe 13 having an on-off valve 14 is connected to the tank 10, and tap water is supplied from the supply pipe 13 and stored. In addition, the tank 10 is provided with a heater 15, and the tap water stored in the tank 10 is boiled to generate steam. Further, a drain pipe 17 equipped with a pump 18 is connected to the bottom surface of the tank 10. By driving the pump 18, the tank 10 is drained.

  A steam outlet 21 is provided on the side wall of the cooking chamber 20. A steam supply pipe 11 extending from the steam generation tank 10 is connected to the same port 21. The steam generated in the steam generation tank 10 is ejected from the steam inlet 21 into the cooking chamber 20 through the steam supply pipe 11, and heats the food in the chamber. In addition, on the upper surface of the cooking cabinet 20, a hot water outlet 22 for cleaning the inside of the cooking cabinet 20 is provided.

  The circulation system 30 is connected between the vicinity of the bottom of the steam generation tank 10 and the hot water outlet 22 provided on the upper wall of the cooking chamber 20, and between the hot water outlet 22 and the steam inlet 21. And a temporary connecting pipe 33 for connecting the two. A pump 32 is provided in the middle of the internal cleaning conduit 31, and the liquid in the steam generation tank 10 is sent to the spout 22 through the internal cleaning conduit 31 by driving the pump 32. The temporary connection pipe 33 is a flexible hose, for example, and is detachably attached to the spout 22. The communication pipe 33 enters the steam supply pipe 11 from the steam inlet 21, and the tip 33 a is bent downward and opens to the liquid level in the steam generation tank 10. In the steam blowing port 21 of the cooking chamber 20, a gap is sealed between the inner edge of the port 21 and the outer surface of the temporary connecting pipe 33.

  The cleaning agent supply system 40 includes a cleaning agent tank 41 in which cleaning agents (for example, citric acid and phosphoric acid) are stored, and a cleaning agent input conduit provided between the tank 41 and the internal cleaning conduit 31. 43. The pipe 43 is connected to the downstream side of the pump 32 of the internal cleaning pipe 31. In addition, a pump 44 is provided in the middle of the pipe 43, and by driving the pump 44, the cleaning agent is supplied from the cleaning agent tank 41 through the cleaning agent insertion pipe 43 to the internal cleaning pipe 31. The

Next, an example of a method for cleaning the steam generation tank 10 will be described.
First, the temporary connecting pipe 33 is attached to the hot water outlet 22, and the pipe 33 is passed through the steam supply pipe 11 from the steam outlet 21. Then, the seal 35 closes the space between the steam outlet 21 and the temporary communication pipe 33. Next, the heater 15 is operated to heat the tap water in the steam generation tank 10 to a predetermined temperature (for example, 80 ° C.). After heating to a predetermined temperature, the pump 32 of the internal cleaning conduit 31 is operated to send hot water in the steam generation tank 10 through the internal cleaning conduit 31 to the spout 22. Hot water returns from the spout 22 through the temporary connection pipe 33 to the steam generation tank 10, thereby circulating hot water. After hot water begins to circulate, the pump 44 of the cleaning agent supply pipe 43 is operated to supply the cleaning agent in the cleaning agent tank 41 to the internal cleaning pipe 31 through the cleaning agent supply pipe 43. Then, the hot water containing the cleaning agent circulates in the internal cleaning pipe 31-the hot water outlet 22-the temporary connection pipe 33-the steam generation tank 10, and the hot water in the steam generation tank 10 is stirred. . In addition, the operation time and the operation cycle of each pump 32 and 44 are adjusted suitably.

  In this way, by stirring the hot water containing the cleaning agent in the steam generation tank 10, the cleaning agent spreads over the wall surface of the tank 10 and the wall surface can be cleaned. In the conventional cleaning method described above, since the hot water in the tank could not be stirred, it was necessary to store the hot water containing the cleaning agent and leave it for a long time (for example, overnight). In the method of this example, the amount of the cleaning agent can be reduced (about 1/5 in one example) and the cleaning time can be shortened as compared with the conventional method.

  After stirring the inside of the steam generation tank 10 for a predetermined time, the pump 18 of the drain pipe 17 is operated to drain hot water in the steam generation tank 10. After draining, only the hot water not containing the cleaning agent is circulated in the circulation system 20 to wash away the cleaning agent remaining in the steam generation tank 10.

  In this example, the tip 33 a of the temporary connection pipe 33 is open to the inside of the steam generation tank 10. Thus, the cleaning agent is prevented from adhering to the steam blowing port 21 and the steam supply pipe 11 by separating the tip 33a of the communication tube 33 from the steam blowing port 21 as much as possible. However, there is no problem even if the tip 33a of the temporary connecting pipe 33 is located at a position close to the steam blowing port 21 by sufficiently circulating hot water not containing the cleaning agent after the tank cleaning to wash away these portions. In this case, it is not necessary to insert the temporary connecting pipe 22 to the back of the steam supply pipe 11, and the pipe can be easily attached. Further, the inside of the steam supply pipe 11 can be cleaned.

FIG. 2 is a diagram schematically showing an example of the structure of a steam convection oven according to another embodiment of the present invention.
In this example, the cleaning method of the cooking chamber 20 will be described together with the cleaning method of the steam generation tank 10. The steam convection oven 1 </ b> A is also provided with a tank 10 that generates steam and a cooking chamber 20 in which food to be cooked is stored, as in the oven of FIG. 1, and between the tank 10 and the cooking chamber 20. A steam supply pipe 11 is provided. Further, the oven 1 is provided with a circulation system 50 for circulating hot water in the steam generation tank, and a cleaning agent charging system 60 for supplying a cleaning agent to the circulation system. Since the steam generation tank 10 and the cooking cabinet 20 have the same operation and configuration as each of the ovens in FIG. 1, the same reference numerals as those in FIG.

The circulation system 50 and the cleaning agent charging system 60 will be described.
The circulation system 50 includes steam in the cabinet cleaning pipe 51 that connects the vicinity of the bottom of the steam generation tank 10 and the spout 22 provided on the upper wall of the cooking cabinet 20, and steam in the middle of the cabinet cleaning pipeline 51. A branch line 53 branched into the supply line 11; A pump 52 is provided in the middle of the internal cleaning pipeline 51, and the liquid in the steam generation tank 10 is pumped up into the internal cleaning pipeline 51 by driving the pump 52. A three-way valve 54 is provided at the intersection of the internal cleaning pipe 51 and the branch pipe 53. When the pump 52 is operated and the valve 54c on the branch line side of the three-way valve 54 is closed and the other valves 54a and 54b are opened, the liquid in the steam generation tank 10 passes through the internal cleaning pipe 51 and the cooking chamber 20. To the spout 22. On the other hand, when the cooker side valve 54b of the three-way valve 54 is closed and the other valves 54a and 54c are opened, the liquid in the steam generation tank 10 passes through the branch cleaning line 51 through the branch line 53, It enters the generation line 11 and returns to the steam generation tank 10.
In FIG. 2, the branch conduit 53 is connected so as to be continuous with a portion extending in the vertical direction of the steam supply conduit 11, but may be connected to a portion extending in the horizontal direction. When connecting to a portion extending in the horizontal direction, it is necessary to block the steam blowing port 21 with a cap or the like during tank cleaning.

The cleaning agent charging system 60 includes a cleaning agent tank 61 for storing a cleaning agent (for example, an alkaline detergent) for cleaning the inside of the cooking chamber, and an interior connecting the tank 61 and the cleaning chamber 51. A cleaning agent supply pipe 63 is provided. A pump 64 is provided in the middle of the internal cleaning agent supply pipe 63.
Furthermore, the same system 60 includes a tank cleaning agent tank 65 that stores a cleaning agent (for example, citric acid) that cleans the steam generation tank 10, and a tank that connects the tank 65 and the internal cleaning agent supply pipe 63. And a cleaning agent supply pipe 67. A three-way valve 68 is provided at the intersection of the tank cleaning agent supply line 67 and the internal cleaning agent supply line 63.

An example of the interior cleaning method will be described.
First, in the circulation system 50, the branch line side valve 54c of the three-way valve 54 provided at the intersection of the internal cleaning line 51 and the branch line 53 is closed and the other valves 54a and 54b are opened. . Then, a water pressure rotating nozzle 25 is attached to the hot water outlet 22 of the cooking chamber 20. Further, in the cleaning agent supply system 60, the valve 68c on the tank cleaning agent supply line side of the three-way valve 68 provided at the intersection of the internal cleaning agent supply line 63 and the tank cleaning agent supply line 67 is closed. The other valves 68a and 68b are opened.

  When there is almost no dirt, after heating the tap water in the steam generation tank 10, the pump 52 is operated. Then, the hot water in the steam generation tank 10 is sent to the hot water outlet 22 through the internal cleaning pipe 51 and is injected into the internal combustion chamber from the water pressure rotating nozzle 25. By setting the temperature of the hot water to a relatively high temperature (for example, 80 ° C.), mild oil stains can be washed away. The injected hot water is drained from the drain pipe 27 of the cooking cabinet 20.

When the dirt is severe, the pump 64 of the internal cleaning agent supply line 63 is operated for a certain time, and the cleaning agent is sent from the internal cleaning agent tank 61 to the internal cleaning agent supply line 63. The cleaning agent is mixed with hot water flowing through the internal cleaning pipe 51, and hot water containing the cleaning agent is injected from the hot water outlet 22 into the storage through the nozzle 25. Thereafter, the water in the steam generation tank 10 is heated to generate steam. The generated steam blows out from the outlet 21 through the steam supply pipe 11 into the warehouse. In this way, cleaning water is jetted into the chamber and steam is blown out to decompose oil stains. After a certain period of time has passed, the dirt floats up from the wall surface, and then only the hot water in the steam generation tank 10 is ejected into the cabinet through the circulation system 50 to sufficiently wash the wall surface.
The amount and timing of supplying the cleaning agent are appropriately adjusted depending on the state of the dirt.

Next, an example of a method for cleaning the steam generation tank 10 will be described.
First, in the circulation system 50, the cooking chamber side valve 54b of the three-way valve 54 provided at the intersection of the internal cleaning pipe 51 and the branch pipe 53 is closed and the other valves 54a and 54c are opened. . In the cleaning agent supply system 60, the internal cleaning agent tank valve 68a of the three-way valve 68 provided at the intersection of the internal cleaning agent supply line 63 and the tank cleaning agent supply line 67 is closed, and the other The valves 68b and 68c are kept open.

Next, the tap water in the steam generation tank 10 is heated to a predetermined temperature (for example, 80 ° C.). After heating to a predetermined temperature, the pump 52 of the internal cleaning line 51 is operated to draw hot water in the steam generation tank 10 into the internal cleaning line 51. Hot water enters the branch line 53 from the internal cleaning line 51 via the three-way valve 54, returns to the steam generation tank 10 through the steam supply line 11, and thereby the hot water circulates. After hot water begins to circulate, the pump 64 of the cleaning agent supply line 63 is operated. Then, the cleaning agent in the tank cleaning agent tank 65 is pumped up from the tank cleaning agent supply pipe 67 through the three-way valve 68 to the cleaning agent supply pipe 63 and is supplied from the pipe 63 to the internal cleaning pipe 51. The Then, the hot water containing the cleaning agent circulates in the internal cleaning pipe 51 -the branch pipe 53 -the steam supply pipe 11 -the steam generation tank 10 and the hot water in the steam generation tank 10 is stirred. become. Thereby, the steam generation tank 10 is washed. After the cleaning, as described above, the cleaning agent is stopped and the rinse is sufficiently performed.
In addition, it is preferable to block | close the steam generation opening 21 of the cooking chamber 20 with a cap etc. during washing | cleaning.

  Moreover, when the hot water outlet 22 is not provided in the cooking chamber 20, the internal cleaning line 51 is directly connected to the steam supply line 11, and the internal cleaning line 51-steam supply line 11-steam generation. A circulation system composed of the tank 10 is configured.

It is a figure which shows typically the structure of the steam convection oven which concerns on embodiment of this invention. It is a figure which shows typically an example of the structure of the steam convection oven which concerns on other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Steam convection oven 10 Steam generation tank 11 Steam supply pipe 13 Tap water supply pipe 14 On-off valve 15 Heater 17 Drain pipe 18 Pump 20 Cooking chamber 21 Steam outlet 22 Hot water outlet 25 Water pressure rotary nozzle 27 Drain pipe 30 Circulation system 31 Inside the chamber Cleaning line 32 Pump 33 Temporary connecting pipe 35 Seal 40 Cleaning agent input system 41 Cleaning agent tank 43 Cleaning agent input line 44 Pump 50 Circulation system 51 Internal cleaning line 52 Pump 53 Branch line 54 Three-way valve 60 Cleaning agent input System 61 Internal cleaning agent tank 63 Internal cleaning agent supply line 64 Pump 65 Tank cleaning agent tank 67 Tank cleaning agent supply line 68 Three-way valve

Claims (5)

A steam convection oven comprising a steam generation tank and a food cooking chamber to which the generated steam is sent,
A circulation system for circulating hot water in the steam generation tank;
A cleaning agent input system for supplying the cleaning agent to the circulation system;
A steam convection oven characterized by further comprising: The circulation system is
An in-chamber cleaning line for sending hot water from the steam generation tank to a spout at the upper part of the cooking chamber;
A temporary connecting pipe that connects between the steam inlet and the hot water outlet for blowing steam from the steam generation tank into the warehouse;
The steam convection oven according to claim 1, comprising: The circulation system is
The steam convection oven according to claim 1, further comprising a conduit that exits from a bottom of the steam generation tank and enters an upper portion of the tank. The circulation system is
An in-chamber cleaning line for sending hot water from the steam generation tank to a spout at the upper part of the cooking chamber;
A branch line going from the internal cleaning line to the steam generation tank;
A switching valve provided at a branch portion of the internal cleaning pipeline to the branch pipeline;
The steam convection oven according to claim 1, comprising: A steam convection oven cleaning method comprising a steam generation tank and a food cooking chamber to which the generated steam is sent,
Into the circulation system that circulates the hot water in the steam generation tank,
A method for cleaning a steam convection oven, wherein hot water containing a cleaning agent is circulated in the circulation system so that the hot water containing a cleaning agent is stirred in the steam generation tank and the steam generation tank is cleaned. .

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