KR102053776B1 - Combi oven with cycle wash function - Google Patents

Abstract

The present invention relates to a combination oven, and more specifically, to a combination oven with a circulating washing function for washing the inside of a cooking chamber by circulating washing water a certain number of times.

Description

Combi oven with cycle wash function

The present invention relates to a combination oven, and more particularly, to a combination oven including a circulating washing function for cleaning the inside of the cooking chamber by recycling in a manner to circulate the washing water.

Convection function to produce food by using heat source such as electricity and gas, and to cook food by using convection of heat that sends air warmed by the heat to the whole cooking room as the fan spins, and water generated by heating The combination oven including all the steam functions for cooking food using steam makes it possible to cook various foods simply and deliciously.

In the cooking process of such a combination oven, various types of foreign substances such as cooking liquid, food dregs, etc. generally occur during cooking of foods, and they fall on the bottom of the cooking chamber or stick to the wall. If contaminants such as cooking liquids or foreign substances are present on the floor or wall of the cooking compartment, the quality of the object to be cooked will be degraded and hygiene problems will occur, so that contaminants present in the cooking compartment are removed after cooking. The process of doing so is essential.

In the related art, a user maintains the cleanliness of the cooking compartment by directly cleaning the inside of the cooking compartment by using a cleaning tool such as a detergent and a shower hose. There is a risk of safety risks such as burns due to human body harm and residual heat inside the cooking chamber.

On the other hand, according to another conventional method, the cleaning pipe is provided on the ceiling of the cooking chamber so as to be connected to the supply pipe and the supply pipe for supplying a separate washing water, the washing water supplied through the supply pipe is sprayed into the cooking chamber by the washing nozzle to wash the contaminants The washing operation was carried out in the manner used. However, this may not be removed cleanly depending on the degree of contaminants stuck in the cooking chamber and separate washing water is consumed for every single cleaning, so even if only a few cleaning operations are performed to ensure that the cooking chamber is cleaned As a result, a large amount of washing water is consumed, which leads to a decrease in efficiency in terms of the amount of washing water used.

(Patent Document 1) KR10-1296774 B1

The present invention is to solve the above problems, to perform the washing operation in the cooking chamber by recycling the washing water to recycle the circulation, to reduce the amount of detergent and water input for cleaning to provide an improved efficiency of the washing operation It is intended to provide a combination oven.

The combination oven according to the present invention includes an inner housing including a cooking chamber, a heating module, a drain and a washing nozzle; A drain module connected to the drain hole and provided at a lower side of the inner housing to accommodate the washing water sprayed and dropped from the washing nozzle and to be discharged to the outside; A steam supply module provided outside the inner housing to supply steam into the cooking chamber; It is configured to include, The drainage module, Heat exchange module for recovering heat through heat exchange from the heat inside the cooking chamber; Characterized in that comprises a.

Specifically, the drainage module is connected to a straight pipe connected to an external straight line, the drain is connected to the drain, the drain receiving the washing water discharged through the drain; A heat exchange module provided in an upper region of the sump, connected to the water pipe, and connected to the steam supply module; A main drain pipe connected to the drain container and having a drain valve for opening and closing a discharge path, discharging the wash water contained in the drain container to the outside depending on whether the drain valve is on or off; An overflow drain, one end of which is connected to the drain container and the other end of which is connected to the main drain pipe, for discharging washing water filled to a predetermined height or more inside the drain container to the outside through the main drain pipe; And a circulation pump, one end of which is connected to the sump and the other end of which is connected to a washing nozzle provided in the inner housing, and the wash water contained in the sump of the water depending on whether the circulation pump is on or off. A supply pipe; Characterized in that comprises a.

The main drain pipe includes a first drain pipe connected to the inlet of the sump and the drain valve, and a second drain pipe connected to the outlet of the drain valve, wherein the overflow drain part is connected to the second drain pipe. The circulation pipe includes a first circulation pipe connected to the inlet of the sump and the circulation pump, and a second circulation pipe connected to an outlet of the circulation pump and a washing nozzle, wherein the direct pipe includes a first direct water valve. And a first straight pipe for supplying washing water into the sump according to whether the first straight valve is on or off, and a second straight valve, wherein the second straight valve is on or off. It characterized in that it comprises a second direct pipe for supplying the washing water to the heat exchange module.

On the other hand, the heat exchange module, characterized in that for converting the direct water supplied through the second direct pipe to hot water using the heat recovered from the heat of the cooking chamber.

On the other hand, hot water supply pipe for supplying hot water from the heat exchange module to the steam generating module and the circulation pipe; The hot water supply pipe further includes a first hot water supply pipe having a first hot water valve, and supplying hot water from the heat exchange module to a steam supply module according to whether the first hot water valve is on or off, and a second hot water supply pipe; And a second hot water supply pipe connected to the second circulation pipe and supplying hot water from the heat exchange module to the second circulation pipe according to whether the second hot water valve is on or off. It is characterized by.

In detail, the washing water filled in the drain container by the drain valve and the first direct water valve to a predetermined height is moved to the path discharged into the cooking chamber through the circulation pipe by the circulation pump and discharged into the drain container. Is characterized in that for circulating the path a predetermined number of times to wash the inside of the cooking chamber.

The present invention, by performing the washing operation in the cooking chamber by recycling the washing water in a circulating manner, it is possible to reduce the amount of detergent and water resources used for washing to improve the efficiency of the washing operation.

In addition, the present invention is provided with a heat exchange module, so that the warm water can be washed by raising the temperature of the washing water without a separate energy consumption for heating, the interior of the cooking chamber is more effectively washed.

1 is a side view of a combination oven according to the present invention.
2 is a view schematically showing a connection structure of a heat exchange module, a direct pipe, a circulation pipe, and a hot water supply pipe according to an embodiment of the present invention.
3 is a view schematically showing a connection structure of a heat exchange module, a direct pipe, a circulation pipe, and a hot water supply pipe according to another embodiment of the present invention.
4 is a view showing a hot water supply path from the heat exchange module in the structure according to an embodiment of the present invention.
5 is a view showing a hot water supply path from the heat exchange module in the structure according to another embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

Throughout the specification, when a part is said to be "connected" to another part, it includes not only "directly connected" but also "electrically connected" with another element in between. . In addition, when a part is said to "include" a certain component, this means that it may further include other components, except to exclude other components unless otherwise stated. As used throughout this specification, the term “step of” or “step of” does not mean “step for”.

The terms used in the present invention have been selected as widely used general terms as possible in consideration of the functions in the present invention, but this may vary according to the intention or precedent of the person skilled in the art, the emergence of new technologies, and the like. In addition, in certain cases, there is also a term arbitrarily selected by the applicant, in which case the meaning will be described in detail in the description of the invention. Therefore, the terms used in the present invention should be defined based on the meanings of the terms and the contents throughout the present invention, rather than the names of the simple terms.

Hereinafter, the present invention will be described in detail with reference to the drawings.

1. Structure of combination oven according to the present invention

Referring to FIG. 1, the combination oven 10 according to an exemplary embodiment of the present invention may include an outer housing (not shown) forming an outer appearance and an inner housing provided in the outer housing (not shown) to form a cooking chamber 110. 100, a drain module 200 provided below the inner housing 100, and a steam supply module 300 provided outside the inner housing 100 to be accommodated in the outer housing (not shown). do.

1.1. Inner housing (100)

The inner housing is composed of a cooking chamber 110, a heating module 120, and a drain port 130.

end. Cooking Room (110)

The cooking chamber is a space in which food is cooked substantially, using heat supplied by the heating module 120 provided in one side space of the cooking chamber and steam supplied by the steam supply module 300 provided in the outer space of the inner housing. The food is located inside the cooking chamber.

At this time, while cooking the food by heat and steam, various types of foreign substances such as cooking liquid, food waste, etc. are generated from the food being cooked, and they fall on the bottom of the cooking chamber or stick to the wall. Therefore, after the completion of the food cooking to remove the contaminants present in the cooking chamber and clean the operation should be performed, the present invention is configured to perform the cleaning operation in the cooking chamber using a circulating washing method circulating the washing water. .

Meanwhile, during the cooking of food, hot air and steam, etc., are generated inside the cooking chamber by the heating module 120 and the steam supply module 300, and liquid substances such as hot air and steam generated on the bottom surface of the cooking chamber. Discharged to the formed drain port 130 is introduced into the drain module 200 to be described later.

I. Heating module (120)

The heating module includes a heat source 122 that generates heat, an internal circulation fan 124, and an internal circulation fan 124, which transfer heat generated by the heat source 122 into the cooking chamber 110 through a rotation operation. It comprises a drive motor (not shown) to drive.

Here, the heat source 122 may be a burner that burns gas to provide heat, or may be an electric heater that generates heat by using a coil generated by an applied current, and may provide heat. All elements are possible.

The heat generated from the heat source 122 flows through the air by the rotation operation of the internal circulation fan 124, for example, the through-hole punched in the partition wall formed between the cooking chamber 110 and the heating module 120. It can move into the cooking chamber 110 through the sphere.

Such a heating module may not only perform a heating operation for cooking food but also perform a heating operation during a cleaning operation for cleaning the cooking chamber 110 after the food cooking is completed. In the case of heating operation for washing, the cooking chamber 110 is constantly operated so as to be maintained at a preset temperature through a setting unit (not shown), so that the cooking chamber 110 is kept constant at the preset temperature during washing. Can be. Accordingly, the temperature is increased by the heat of the cooking chamber while the washing water circulates through the cooking chamber.

Therefore, as the cooking chamber temperature is maintained at the set temperature by the heating module, the temperature of the washing water circulating therein may also be kept constant.

In addition, while the cooking chamber is maintained at the set temperature by the heating module, hot air may be generated therein. The hot air generated at this time may be used to increase the temperature of the washing water by the heat exchange module 220 described later.

All. Drainer 130

The drainage port is formed on the bottom of the cooking chamber 110, and when washing, the washing water is sprayed through the washing nozzle 260b to be described later to discharge the washing water falling to the floor while washing the inside of the cooking chamber into the drain module 200.

1.2. Drainage module (200)

The drainage module is provided on the lower side of the inner housing 100 and has a structure connected to the drain port 130 of the cooking chamber 110 to spray the cleaning nozzle 260b to clean the inside of the cooking chamber 100 during the cleaning operation. The washing water is discharged to the outside under the control of a control means (not shown) which will be described later.

end. Drainpipe (210)

The drain box is connected to the drain port 130 through the inlet, and accommodates the washing water which has been washed inside the cooking chamber 110 introduced through the drain port 130, and includes a first water pipe connected to an external water line. Water (direct water) supplied for washing from 401 is fresh water. This drain box is connected to the main drain pipe 230 and the overflow drain 240 to be described later to be discharged to the wash water that is fresh inside, and connected to the circulation pipe 260 to be described later and fresh water inside Ensure that the wash water is supplied to the cooking chamber.

I. Heat exchange module (220)

The combination oven of the present invention may include a heat exchange module in the drainage module 200. The heat exchange module is provided in an upper region of the drain container 210, and has a heat exchange structure for performing heat exchange to recover heat from waste heat such as heat in the cooking chamber 110 introduced through the drain port 130, and an external direct line. And a discharge port connected to the water supply pipe 400 connected to the first hot water supply pipe 2221 connected to the steam supply module 300.

<Example 1>

2 is a view schematically illustrating a connection structure of a heat exchange module 220, a direct pipe 400, a circulation pipe 260, and a steam supply module 300 according to an embodiment of the present invention. Referring to this, first, the water pipe 400 connected to an external water line is a first water pipe 401 for supplying water to the drain 210 and a water supply for supplying water to the heat exchange module 220. The first straight pipe 401, including the two straight pipes 402, forms a first straight water supply path which is a straight water supply path from an external straight line to the drain 210, and the second straight pipe 402 Form a second direct water supply path that is a direct water supply path to the heat exchange module 220. At this time, the first direct water pipe 401 is provided with a first direct water valve 401a to open and close the first direct water supply path, and the second direct pipe 402 does not have a separate valve, so the heat exchange module Direct water is supplied to 220 at all times.

The first hot water supply pipe 2221 connected to the heat exchange module 220 to supply hot water to the steam supply module 300 is a first hot water supply path that is a hot water supply path from the heat exchange module 220 to the steam supply module 300. And a first hot water valve 2221a is installed in the first hot water supply pipe 2221 to open and close the first hot water supply path to control the hot water supply.

The circulation pipe 260 that supplies the fresh water (wash water) to the cooking chamber 110 includes the first circulation pipe 261 connected to the drain container 210 and the cooking chamber 110. The first circulation pipe 261 is installed between the second circulation pipe 262 and the first and second circulation pipes 261 and 262 connected to the upper part and sucks water (wash water) contained in the drain box 210. Including the circulation pump 270 to supply to the second circulation pipe 262, to form a washing water supply path from the drain container 210 into the cooking chamber 110.

Here, the first direct water valve 401a, the first hot water valve 2221a, and the circulation pump 270 are controlled on / off according to a signal of a control means connected to a setting unit (not shown).

<Example 2>

3 is a view schematically illustrating a connection structure of a heat exchange module 220, a water pipe 400, a circulation pipe 260, and a steam supply module 300 according to another embodiment of the present invention. In this case, in the structure according to the first embodiment, a second direct valve 402a is additionally provided in the second direct pipe 402 forming a direct supply path from the external direct line to the heat exchange module 220. Open and close the two direct water supply path, and further install a second hot water supply pipe (2222) between the first hot water supply pipe (2221) and the second circulation pipe 262, the hot water from the heat exchange module 220 is the second circulation Supply to the pipe 262 may bring an effect of raising the temperature of the wash water. Here, the second direct valve 402a may not be provided separately, and may be configured such that the direct water is always supplied to the heat exchange module 220 as in the first embodiment.

Looking at the hot water supply path of the heat exchange module 220 formed through the connection structure as described above, it can be divided into two cases according to the structure according to the first and second embodiments described above.

1) When hot water is supplied to the steam supply module (see FIG. 4)

In the structure according to the first embodiment, when cooking food, the first direct water supply path 401a and the first hot water valve 2221a are turned on to open the first direct water supply path and the first hot water supply path, Since the second direct pipe 402 is not provided with a separate valve, direct water (water) is always supplied to the heat exchange module 220 through the second direct water supply path.

Here, inside the cooking chamber 110, a hot liquid material including hot hot air to the heat and steam supplied for food cooking, cooking liquid generated from the food to be cooked, water vapor, and the like, and these drain holes 130 It is introduced into the sump 210. Accordingly, the heat exchange module 220 recovers heat from the introduced high temperature hot air and the liquid material through heat exchange, and uses the recovered heat to direct hot water (water) supplied through the second straight pipe 402. By switching to, it can be supplied to the first hot water supply pipe 2221. The hot water moves to the first hot water supply path formed through the first hot water supply pipe 2221 and is supplied to the steam supply module 300 so that the steam supply module 300 may generate steam from the hot water, not the cold water.

Through such a connection structure, it is applied in a manner to supply hot water to the steam supply module, it can bring the effect of reducing the energy consumed for steam generation in the steam supply module. In addition, such a heat exchange module, by lowering the temperature of the entire drainage module 200 through heat exchange, can effectively work to improve the durability of the appliance.

2) When hot water is supplied to the circulation pipe (see FIG. 3)

In the structure according to the second embodiment, during the washing operation, the first and second direct water supply valves 401a and 402a and the second hot water valve 2222a are turned on, respectively, so that the first and second direct water supply paths and the second hot water are used. The first hot water supply path may be blocked by opening the supply path and turning off the first hot water valve 2221a.

Accordingly, direct water (washing water) is supplied to the inside of the sump 210 through the first direct water supply path, and when the water is filled up to a predetermined level inside the sump 210, the first direct valve 401a is opened. Off so no more direct water is supplied. In addition, direct water (wash water) is supplied to the heat exchange module 220 through the second direct path. At this time, after a predetermined time, the second direct valve 402a is turned off and a predetermined reference amount is applied to the heat exchange module 220. Only as much water (washing water) can be supplied.

When the washing water is filled in the sump 210 to a predetermined level, the washing water contained in the sump 210 by the circulation pump 270 moves from the first circulation pipe 261 to the second circulation pipe 262. Can be.

At this time, the cooking chamber 110 is maintained at a preset temperature by the heating module 120, and air (hot air) containing heat according to the temperature is generated therein and drained through the drain hole 130. Flows into the barrel (210). Accordingly, the heat exchange module 220 recovers heat from the introduced hot air through a heat exchange action, increases the temperature of the washing water supplied through the second direct pipe 402 by using the recovered heat, and converts it into hot water. The hot water may be supplied to the hot water supply pipe 222. The hot water moves to the second hot water supply path formed through the second hot water supply pipe and is mixed with the wash water inside the second circulation pipe 262, so that the temperature of the washing water moving to the washing water supply path by the hot water is increased. 110 may be supplied.

Through such a connection structure, it is applied in a way to raise the temperature of the washing water, it can bring the effect of increasing the washing efficiency.

Here, when the first hot water supply valve 2221a is turned on to open the first hot water supply path, the hot water from the heat exchange module 220 is not only supplied to the second circulation pipe 262 but also to the steam supply module 300. In addition, it is possible to supply at the same time, while generating a high-temperature steam in the cooking chamber 110, if necessary, by supplying the washing water of the elevated temperature into the cooking chamber 110 may further increase the washing effect.

All. Main drain (230)

The main drain pipe is a passage through which water (wash water), which is connected to the main opening formed in the drain container 210, is discharged to the outside and is discharged to the outside, and opens and closes the main drain pipe. And a first drain pipe 231 connected to the second drain pipe 231 and a second drain pipe 232 connected to the outlet of the drain valve 234.

The drain valve 234 operates in response to a signal from a control means connected to a setting unit (not shown) provided in the exterior of the oven, and the control means is drained in accordance with the setting data input to the setting unit (not shown). The valve 234 is controlled on / off to open and close the water (wash water) discharge flow of the main drain pipe.

For example, when the drain valve 234 is in an off state, the washing water that has performed the inside of the cooking chamber is circulated again in the inside of the cooking chamber in a fresh water in the drain container 210 without being immediately drained to the outside. . On the other hand, when the drain valve 234 is turned on (On), the water (wash water) that is currently fresh water in the sump (210) is all drained to the outside, clean water (direct water supplied from the direct pipe 400) Filled with).

la. Overflow Drain (240)

The overflow drain part has a structure in which one end of the overflow opening 240a is connected to the drain container 210, and the other end is connected to the second drain pipe 232 of the main drain pipe 230. If the fresh water exceeds a predetermined level, the amount of water immediately flows through the overflow opening 240a to the second drain pipe 232 of the main drain pipe 230 and is always discharged to the outside. . There is no separate valve for opening / closing the discharge flow between the overflow drain and the second drain pipe 232 so that the water filled in excess of a predetermined level is discharged to the outside at all times to the drain container 210. Ensure that fresh water is maintained at or below a maximum predetermined level. In order to achieve the above object, the overflow drain portion is connected, for example, to the inside of the sump 210 so as to protrude upward by a predetermined height, so that the water flows into the sump 210 so that the protruding height is exceeded. When filled, the excess water may immediately flow into the second drain pipe 232 through the overflow opening 240a to be discharged to the outside. However, the present invention is not limited thereto, and various shapes and positional deformations are possible within the range in which the object of the overflow drain can be achieved.

hemp. External exhaust pipe (250)

The external exhaust pipe is formed to extend upwardly to be connected to the exhaust opening formed on the upper surface of the drain box 210 to discharge the gas generated in the cooking chamber 100 to the outside. At this time, the gas discharged through the external exhaust pipe of the present invention is discharged while the temperature is lowered by the heat exchange module 220 in the state of high temperature and high pressure, and further constitutes a separate cooling device for cooling the gas of high temperature and high pressure. There is no need to do so, resulting in cost and energy savings.

bar. Circulation pipe (260)

The circulation pipe is connected to the circulation opening formed in the drain container 210 and the washing nozzle 260b provided at the upper portion of the cooking chamber 110 to wash the wash water (water) contained in the drain container 210. It is supplied to the cooking chamber 110 through 260b). At this time, the second embodiment of the present invention described above, the circulation pipe is connected to the second hot water supply pipe 2222 of the hot water supply pipe 222 connected to the discharge port of the heat exchange structure of the heat exchange module 220 in a portion of the hot water It may be configured to be supplied with.

Specifically, the circulating pipe is the washing of the first circulation pipe 261 and the outlet of the circulation pump 270 connected to the inlet of the drain container 210 and the circulation pump 270 and extended from the cooking chamber 110 is provided above the cooking chamber 110. And a second circulation pipe 262 connected to the nozzle 260b. The circulation pump 270 sucks the washing water (water) contained in the sump 210 to supply the washing water from the first circulation pipe 261 to the second circulation pipe 262.

Here, the circulation pump 270 operates in response to a signal from a control unit connected to a setting unit (not shown) provided on the exterior of the oven, and circulates the washing water from the drain container 210 to the inside of the cooking chamber 110. do.

On the other hand, although not shown in the drawings, the circulation pipe is connected to the detergent supply pipe (not shown) having a detergent valve operating according to the signal of the control means connected to the setting unit (not shown), the setting of the setting unit (not shown) The detergent may be supplied from the detergent supply pipe (not shown) by the control means according to the control unit, may be mixed with the washing water inside the circulation pipe, and sprayed into the cooking chamber 110 through the washing nozzle 260a.

1.3. Steam Supply Module 300

The steam supply module is provided outside the inner housing 100 and is connected to a first hot water supply pipe 2221 connected to the heat exchange module 220 to form a first hot water supply path formed through the first hot water supply pipe 2221. The hot water may be supplied from the heat exchange module 220 to generate steam and supply the steam to the cooking chamber 110.

Accordingly, since the steam supply module generates steam from hot water, the steam supply module has an effect of reducing energy consumed for steam generation as compared to generating steam from cold water.

The method of generating steam may include, for example, heating water using the heat source 122 of the heating module 120 to generate steam or spraying the supplied water directly into the heat source 122 and generating an internal circulation fan ( 124 may be scattered and generate steam.

The operation flow for cleaning the cooking chamber 110 in the combination oven according to the present invention having such a structure will be described.

2. Washing operation of the combination oven according to the present invention

2.1. Soak washing step (S100)

The soaking washing step is a step in which the initial washing is performed after the completion of food cooking, and the cooking chamber so that contaminants, including various types of food waste fixed on the surface of the cooking chamber 110, are easily removed with sufficient moisture. The internal steam 110 is supplied to the hot steam for a predetermined time, where the steam supply module 300 of the present invention receives the hot water exchanged from the heat exchange module 220, thereby saving energy for heating the cold water. By supplying the hot steam to the cooking chamber 110 in a short time to perform the soaking washing step, it is possible to smoothly wash.

2.2. Aval washing step (S200)

Avalanche washing step, in the state that the contaminants inside the cooking chamber 110 is sufficiently called by the hot steam supplied from the steam supply module 300 through the soaking washing step (S100), to the cooking chamber 100 to remove it As the washing step is performed, the inside of the cooking chamber 110 is a state in which a contaminant including a cooking liquid, various types of food wastes, etc., generated while cooking food is present, and thus, the cooking chamber 110 is performed by performing a priming washing step. To remove the contaminants present in the

end. Discharge Path Closure Step (SS210)

First, the drain valve 234 is turned off to close the discharge path of the main drain pipe 230.

I. Washing water storage step (S220)

After the discharge path of the main drain pipe 230 is closed, the first direct water supply valve 401a is turned on to open the first direct water supply path, and the washing water supplied through the first direct water pipe 401 (water ) Is stored in the sump 210. When the stored wash water (water) is filled to the predetermined level of the sump 210, the first direct water valve 401 is turned off to close the first direct water supply path, so that more washing water (water) is drained. Do not fill in the barrel (210).

The washing water (water) stored in the sump 210 through this step is circulated and reused a predetermined number of times of the washing operation performed in the priming washing step.

On the other hand, in the structure according to the second embodiment of the present invention, when a second second straight valve 402a is separately provided in the second straight pipe 402, the second straight valve 402a is provided here. By only turning on for a time to open the second direct water supply path, the washing water (water) by a predetermined reference amount may be stored in the heat exchange module 220 through the second direct pipe 402. At this time, the washing water (water) accommodated in the heat exchange module 220 may be exchanged from the waste heat of the cooking chamber 110 to convert the washing water (water) into hot water, and may be supplied to the hot water supply pipe 222 by discharging it.

All. Washing water circulation step (S230)

When the washing water (water) is filled in the drain container 210 by a predetermined level through the washing water storage step (S220), for cleaning to remove contaminants in the cooking chamber 110, the circulation pump 270 is turned on. Let's do it. Accordingly, the circulation pump 270 sucks the washing water (water) contained in the sump 210 and supplies the washing water (water) from the first circulation pipe 261 to the second circulation pipe 262.

The washing water (water) sprayed through the washing nozzle 260b and flowing to the bottom while washing the inside of the cooking chamber 110 is received in the drain container 210 through the drain hole 130. At this time, since the main discharge path is closed by the off-drain valve 234, the washing water flowing into the drain container 210 through the drain port 130 is not discharged to the outside. The fresh water is drained into the sump 210 as it is, and the fresh water is recycled to the circulation pipe 260 by the circulation pump 270.

Here, the washing water circulated to the drain container 210-> the cooking chamber 110 through the washing water circulation step, while washing the inside of the cooking chamber 110 maintained at a predetermined temperature by the heating module 120, the cooking chamber 110 The temperature is increased by the heat according to the temperature of), it may have a temperature higher than the initial state of the washing water (water) stored in the washing water storage step (S100).

In the washing water circulation step, the washing water is recycled by repeating a predetermined number of times set through a setting unit (not shown) to clean the inside of the cooking chamber 110.

While repeating such an operation, most of the contaminants existing in the cooking chamber 110 are removed and included in the washing water, and the washing water in this state may be referred to as contaminated water.

As such, each time the washing chamber 110 is washed, the used washing water is drained, and the new washing water is not supplied and used. Instead, the washing water is circulated in a manner that recycles a certain amount of washing water several times, thereby reducing the water resources consumed in the washing operation. can do. In addition, the washing water may be maintained at a predetermined temperature while circulating the cooking chamber 110 maintained at the set temperature, thereby increasing the washing effect.

la. Polluted water discharge step (S240)

After repeating the washing water circulation step (S230) a predetermined number of times, it is a step of discharging the contaminated water currently in the drain box 210 to the outside. To this end, by turning off the drain valve 234 which is turned off, the main drain pipe 230 is opened, and the contaminated water having been washed a predetermined number of times in the drain box 210 is flushed with the first drain pipe 231. ) Is discharged to the second drain pipe 232 to the outside.

2.3. This washing step (S300)

The washing step is a step in which the main washing is performed inside the cooking chamber 110 in a state in which most contaminants are removed through a circular washing operation using a hot water at a time of the priming washing step S200. Detailed steps for the circulation cleaning is made in the same manner as the above-described priming washing step (S100).

end. Discharge path closing step (S310)

First, the drain valve 234 is turned off to close the discharge path of the main drain pipe 230.

I. Washing water storage step (S320)

 After the discharge path of the main drain pipe 230 is closed, the first direct water supply valve 401a is turned on to open the first direct water supply path, and the washing water supplied through the first direct water pipe 401 (water ) Is stored in the sump 210. When the stored wash water (water) is filled to the predetermined level of the sump 210, the first direct water valve 401 is turned off to close the first direct water supply path, so that more washing water (water) is drained. Do not fill in the barrel (210).

The washing water (water) stored in the sump 210 through this step is circulated and reused a predetermined number of times of the washing operation performed in the washing step.

On the other hand, in the case of the structure according to the second embodiment of the present invention, here, by turning on the second direct valve 402a only for a predetermined time to open the second direct feed supply path, the second direct pipe 402 Through) may be stored in the heat exchange module 220 by the predetermined amount of the washing water (water). At this time, the washing water (water) accommodated in the heat exchange module 220 may be exchanged from the waste heat of the cooking chamber 110 to convert the washing water (water) to hot water, and may be supplied to the hot water supply pipe 222 by discharging it.

All. Washing water circulation step (S330)

When the washing water (water) is filled in the drain container 210 by a predetermined level through the washing water storage step (S320), for the main cleaning of the inner wall of the cooking chamber 110, the circulation pump 270 is turned on. . Accordingly, the circulation pump 270 sucks the washing water (water) contained in the sump 210 and supplies the washing water (water) from the first circulation pipe 261 to the second circulation pipe 262.

In this step, in order to clean the inside of the cooking chamber 110, for example, the detergent supply pipe that is connected to the drain container 210 or connected to the circulation pipe 260 to supply a detergent to mix the detergent in the wash water The detergent valve (not shown) provided in (not shown) is turned on for a predetermined time to open the detergent supply, and then off to block the detergent supply, so that a certain amount of detergent is used for the cleaning operation. You can do that.

In the washing step (S300), a method of introducing detergent into the washing water may be implemented in various ways using known techniques.

Here, the washing water is circulated to the sump 210-> cooking chamber 110, the temperature is increased by the heat of the cooking chamber 110 is maintained at a set temperature, the washing water stored in the washing water storage step (S210) (water It may have a higher temperature than the initial state of). Accordingly, the washing water in the form of hot water and mixed with detergent may be sprayed by the washing nozzle 260b to cleanly clean even small contamination remaining on the inner wall of the cooking chamber 110.

The washing water is sprayed through the washing nozzle 260b to flow to the floor while washing the inside of the cooking chamber 110, which is accommodated in the drain container 210 through the drain hole 130. At this time, since the main discharge path is closed by the off-drain valve 234, the washing water flowing into the drain container 210 through the drain port 130 is not discharged to the outside. The fresh water is drained into the sump 210 as it is, and the fresh water is recycled to the circulation pipe 260 by the circulation pump 270 and is repeatedly performed.

In the washing water circulation step, the washing water is recycled by repeating a predetermined number of times set through a setting unit (not shown) to clean the inside of the cooking chamber 110.

As such, each time the washing chamber 110 is washed, the used washing water is drained, and new washing water is not supplied and used. Instead, the washing water is circulated in a manner of recycling a predetermined amount of washing water several times, thereby reducing the water resources consumed in the washing operation. In addition, the detergent added for the main cleaning also brings the effect of saving.

la. Washing water discharge step (S340)

After repeating the washing water circulation step (S330) a predetermined number of times, it is a step of discharging the wash water currently being drained to the drain 210 to the outside. To this end, the washing water that has been washed by a predetermined number of times that the main drain pipe 230 is opened by turning off the drain valve 234 that is turned off, and the fresh water is drained into the drain container 210 is first drain pipe 231. ) Is discharged to the second drain pipe 232 to the outside.

2.4. Rinsing washing step (S400)

In the rinsing washing step, in the state of removing even the fine contaminants present in the inner wall of the cooking chamber 110 through the operation of circulating the predetermined number of times using the washing water of hot water mixed with detergent in the main washing step (S300). The final rinsing and washing operation is performed. The detailed steps for the circulating washing are performed in the same manner as the above-described priming washing step S100 and the present washing step S200.

end. Discharge path closing step (S410)

 First, the drain valve 234 is turned off to close the discharge path of the main drain pipe 230.

I. Washing water storage step (S420)

After the discharge path of the main drain pipe 230 is closed, the first direct water supply valve 401a is turned on to open the first direct water supply path, and the washing water supplied through the first direct water pipe 401 (water ) Is stored in the sump 210. When the stored wash water (water) is filled to the predetermined level of the sump 210, the first direct valve 401 is turned off to close the water (wash water) supply path of the direct pipe 400, and The above water (washing water) is not filled in the sump 210.

The washing water (water) stored in the sump 210 through this step is circulated and reused a predetermined number of times of the rinsing washing operation performed in the rinsing washing step.

All. Washing water circulation step (S430)

When the washing water (water) is filled in the water tank 210 by a predetermined level through the washing water storage step (S320), the circulation pump 270 is turned on for the final rinsing operation of the interior of the cooking chamber 110 after the washing operation is completed. (On) Accordingly, the circulation pump 270 sucks the washing water (water) contained in the sump 210 and supplies the washing water (water) from the first circulation pipe 261 to the second circulation pipe 262.

The washing water (water) sprayed through the washing nozzle 260b and flowing to the bottom while washing the inside of the cooking chamber 110 is accommodated in the drain container 210 through the drain hole 130. At this time, since the main discharge path is closed by the off-drain valve 234, the washing water flowing into the drain container 210 through the drain port 130 is not discharged to the outside. As it is fresh water to the sump 210 without being washed, the fresh water is recycled to the circulation pipe 260 by the circulation pump 270 to wash the inside of the cooking chamber 110 again.

Here, the washing water circulated to the drain container 210-> the cooking chamber 110 through the washing water circulation step, while washing the inside of the cooking chamber 110 maintained at a predetermined temperature by the heating module 120, the cooking chamber 110 The temperature is increased by the heat according to the temperature of), it may have a temperature higher than the initial state of the washing water (water) stored in the washing water storage step (S100).

In the washing water circulation step, the washing water is recycled by repeating a predetermined number of times set through a setting unit (not shown) to clean the inside of the cooking chamber 110.

While repeating such an operation, all materials including detergent solution, etc., which may remain in the cooking chamber 110 after the washing step S300 may be completely removed and rinsed cleanly.

As such, by circulating and washing a predetermined amount of washing water several times, it is possible to reduce the water resources consumed in the washing operation. In addition, since the washing water is maintained at a predetermined temperature while circulating the cooking chamber 110 maintained at the set temperature, the washing effect can be enhanced.

On the other hand, the technical idea of the present invention has been described in detail according to the embodiment, it should be noted that the embodiment is for the purpose of illustration, not for the limitation. In addition, those skilled in the art will understand that various embodiments are possible within the scope of the technical idea of the present invention.

100: inner housing
110: cooking chamber
120: heating module
130: drain
200: drainage module
210: drain bottle
220: heat exchange module
230: main drain pipe
240: overflow drain
250: external exhaust pipe
260: circulation pipe
270: circulation pump
300: steam supply module
400: water pipe

Claims (6)

An inner housing including a cooking chamber, a heating module, a drain and a cleaning nozzle;
A drain module connected to the drain hole and provided at a lower side of the inner housing to accommodate the washing water sprayed and dropped from the washing nozzle and to be discharged to the outside; And
A steam supply module provided outside the inner housing to supply steam into the cooking chamber; It is configured to include,
The drain module,
A drain container connected to a straight pipe connected to an external straight line and connected to the drain hole, to accommodate the washing water discharged through the drain hole;
It is provided in the upper region of the sump, connected to the water pipe, connected to the steam supply module, recovers heat from heat from the heat inside the cooking chamber to convert the direct water supplied through the water pipe into hot water Heat exchanger module;
It includes a circulation pump, and comprises a first circulation pipe connected to the drain and the inlet of the circulation pump, and a second circulation pipe connected to the washing nozzle of the circulation pump, whether or not the circulation pump is on or off A circulation pipe for supplying the wash water, which is fresh in the drain box, into the cooking chamber;
It is configured to include,
A hot water supply pipe configured to supply hot water from the heat exchange module to a steam supply module and a circulation pipe; More,
The hot water supply pipe includes a first hot water supply pipe having a first hot water valve and supplying hot water from the heat exchange module to a steam supply module according to whether the first hot water valve is on or off, and a second hot water valve. And a second hot water supply pipe connected to a second circulation pipe and supplying hot water from the heat exchange module to the second circulation pipe according to whether the second hot water valve is on or off. The method of claim 1,
The drain module,
A main drain pipe connected to the drain container and having a drain valve for opening and closing a discharge path, discharging the wash water contained in the drain container to the outside depending on whether the drain valve is on or off;
An overflow drain, one end of which is connected to the drain container and the other end of which is connected to the main drain pipe, for discharging washing water filled to a predetermined height or more inside the drain container to the outside through the main drain pipe;
Combi oven characterized in that comprises a. The method of claim 2,
The main drain pipe includes a first drain pipe connected to the inlet of the drain and the drain valve, and a second drain pipe connected to the outlet of the drain valve.
The overflow drain is connected to the second drain pipe,
The water pipe further includes a first water pipe, and further includes a first water pipe and a second water valve to supply washing water to the inside of the sump depending on whether the first water valve is on or off. Combi oven characterized in that it comprises a second straight pipe for supplying the washing water to the heat exchange module according to whether the second direct valve on / off. The method of claim 3,
The heat exchange module,
Combi oven, characterized in that for converting the direct water supplied through the second straight pipe to hot water using the heat recovered from the heat of the cooking chamber. delete The method of claim 3,
The washing water filled in the sump by the drain valve and the first direct valve to a predetermined height is injected into the cooking chamber through the circulation pipe by the circulation pump, and moves in a path discharged into the sump,
The washing water is a combination oven, characterized in that for cleaning the inside of the cooking chamber while circulating the path a predetermined number of times.

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