Water-cooled barbecue system

Disclosed is a water-cooled barbecue system with a cooling fluid circulation system which avoids meat from sticking to a grill and from burning. The water-cooled barbecue system comprises: a body, the upper portion thereof being open to provide heat from the supplied fuel, a receiving space being defined by the body; a grill with a frame, the frame having a first communicating hole and a second communicating hole to introduce and/or discharge fluid, a fluid circulation tube communicating between the first communicating hole and the second communicating hole being provided inside of the frame; and a cooling device connected with the fluid circulation tube through the first communicating hole and the second communicating hole, and cooling fluid which circulates inside of the fluid circulation tube. The water-cooled barbecue system, which has the body at the upper portion thereof and the cooling device inside thereof, can further a housing, which can be moved and assembled.

This is a U.S. National Phase Application of PCT International Application No. PCT/KR2006/000550, filed Feb. 17, 2006.

TECHNICAL FIELD

The present invention relates to a water-cooled barbecue system, particularly to a barbecue system having a cooling fluid circulation system at the lower portion of the grill on which meat to be roasted is placed, to avoid the meat from burning.

BACKGROUND ART

Generally, meat or fish is heated and cooked by means of a charcoal or a gas range so that the fat inside of the meat or fish can be controlled adequately for taste. When we roast meat or fish in such a manner, a grill is required to gradually roast them with a certain distance from the fire.

FIGS. 20 and 21show a barbecue grill according to the conventional art.

Referring toFIGS. 20 and 21, a barbecue grill according to the conventional art has a body102, a charcoal container104, and a grill106. The charcoal container104is located inside of the body102. The grill106is placed at the upper portion of the body to hold the meat to be roasted. The grill106has a mesh portion108with equal spacing.

When the grill106is boarded over the upper portion of the charcoal container104and the meat to be roasted is placed on the grill106, it is ready to cook the meat. During the cooking, the grill106is heated by the charcoal fire contained in the charcoal container104. Thus, without regard to the progress of the cooking, the meat starts to stick to the mesh portion108of the grill106. A portion of the meat contacted with the mesh portion106is burnt while the inside of the meat has not been cooked. Accordingly, while the meat is being cooked, the grill stuck to the meat should be replaced with a new one. However, since the replaced grill is also rapidly heated, the above process is repeated. Therefrom, the inconvenience of having to replace grills many times during the cooking is caused.

U.S. Pat. No. 4,744,292, which was granted to Toshio Nagata on Mar. 17, 1988, discloses a barbecue grill for roasting meat placed in a casing while avoiding the heat from transferring to a person.

Meanwhile, U.S. Pat. No. 6,230,700, which was granted to Dale T. Daniels et al on May 15, 2001, discloses a charcoal grill having a body separable from a frame.

Referring toFIG. 22, a charcoal grill10includes a body12. The body12is supported by a frame14. At one side of the frame14, an extended shelf16is integrally fixed. A plurality of support arms84are attached to the outer surface of the lower portion26of the body. The support arms84are placed on the frame14to support the body12of the charcoal grill10. Due to this, the body12is easily separated from the frame14without using a tool. At the lower portion of the frame14, a shelf20is placed to provide stability to the frame14. At the lower end portion of the frame14, a couple of wheels24are provided to help the charcoal grill10easily move. Opposite to the extended shelf16, an air introduction system58is disposed at one side of the body12. The air introduction system58includes an internal fan for introducing air flow.

However, such constructed charcoal grill10can be used only when the frame14and the body12are assembled. That is, the charcoal grill10can be separated from the frame14for cleaning purposes only, but it cannot be used indoors after separation. In addition, it still has the defect of burning the meat to be roasted.

DISCLOSURE OF INVENTION

Technical Problem

The present invention is provided to overcome the problem stated above which the prior art contains. One aspect of the present invention provides a barbecue system which avoids meat from sticking to a grill and from burning and can be used both indoors and outdoors.

Technical Solution

One embodiment of the present invention provides a water-cooled barbecue system comprising: a body, the upper portion thereof being open to provide heat from the supplied fuel, a receiving space being defined by the body; a grill with a frame, the frame having a first communicating hole and a second communicating hole to introduce and/or discharge fluid, a fluid circulation tube communicating between the first communicating hole and the second communicating hole being provided inside of the frame; and a cooling device connected with the fluid circulation tube through the first communicating hole and the second communicating hole, and cooling fluid which circulates inside of the fluid circulation tube.

The water-cooled barbecue system according to the present invention further comprises a housing, which can be moved and assembled, for receiving the body in a detachable manner at an upper portion thereof and receiving a cooling device inside of it.

At both sides of the upper portion of the grill, handles are coupled to be deflected from the lateral axis.

At the upper portion of the housing and at one side of the body, a shelf is provided. Inside of the shelf, an auxiliary shelf is installed in a sliding manner. Inside of the housing, sliding shelves are provided to receive the cooling device and a fuel tank, respectively, and guide rails are provided to withdraw the sliding shelves.

The body comprises a heating portion for supplying heat to the lower portion of the grill, a cooling switch portion for operating the cooling device to cool the heated grill, and a lamp for displaying the state of the operation of the cooling device by a signal from the cooling switch portion.

The heating portion includes a plurality of pipe-type burners arranged parallel inside of it, and may further includes a charcoal container disposed at the upper portion of the plural pipe-type burners.

The cooling switch portion includes a grill sensor portion for sensing the existence of the grill and determining whether to supply fluid, and an operation switch portion for supplying fluid to the fluid circulation tube by the handling of a user.

The fluid circulation tube includes a first socket and a second socket which communicate with the first communicating hole and the second communicating hole, respectively. One or more tubes are branched from the first socket to form a wave path and returned to the second socket. The first and second sockets are made in a manner avoiding the leakage of fluid.

The cooling device is provided in a separate cooling kit. The cooling device includes a tank for containing fluid inside of it, a pump for pumping the fluid inside of the tank toward the fluid circulation tube, a cooler for cooling the fluid which has been discharged after circulation in the fluid circulation tube, a cooling fan for circulating cool air to cool down the heated cooler, and a connection hose for connecting the tank and the fluid circulation tube.

The cooling kit includes a transparent window and a buoy for marking the water level in the tank, a drain disposed at a bottom surface thereof for discharging water, and an inflow hole disposed at an upper portion thereof for introducing fluid, the inflow hole having a filter for filtering impurities.

The cooling kit is placed on the sliding shelf disposed in the housing. Between the sliding shelf and a door of the housing, a crank bar for withdrawing the sliding shelf is provided.

A duct is installed between the cooling fan and the cooler.

The cooler includes a cooling portion with a thermoelectric element and a power supply portion.

As for the operation of the water-cooled barbecue system according to the present invention, if the grill is mounted on the upper portion of the body, the grill sensor portion senses the grill and operates the cooling device. According to this, fluid circulates in the fluid circulation tube of the grill.

Advantageous Effects

As described so far, the water-cooled barbecue system according to the present invention avoids the overheating of a grill by having the cooling fluid circulation system at the lower portion of the grill, and thus, the meat to be cooked is prevented from sticking to the grill and burning.

Also, the water-cooled barbecue system according to the present invention can be used both indoors and outdoors by being attached to or detached from the moveable housing. Also, since various fuels, such as charcoal and gas, can be used, the efficiency of the grill becomes high.

Also, according to the present invention, since a sensor for sensing the grill is provided, the cooling device is not operated while the grill is removed. Thus, high stability is expected.

Thus, since the water-cooled barbecue system according to the present invention can roast meat without burning it, the fat inside of the meat can be removed while as much of the meat juice as possible is kept. Thus, tender and soft tasty meat can be obtained.

Also, since the water-cooled barbecue system according to the present invention provides the fluid circulation tube with a structure for avoiding the leakage of fluid, the user can move or detach the grill reliably.

Also, according to the water-cooled barbecue system of the present invention, since meat does not stick to the grill, the grill can be cleaned after use with ease and the amount of synthetic detergent consumed can be reduced. Thus, it contributes to water quality conservation.

It is understood by those skilled in the art that various changes or modifications may be made in the above embodiment of the present invention without departing from the spirit and scope of the invention. Thus, the scope of the present invention will be represented by the claims to follow.

MODE FOR THE INVENTION

Hereunder, with reference to the attached drawings, a preferred embodiment of the present invention is explained in detail.

FIGS. 1-3illustrate a water-cooled barbecue system1according to the preferred embodiment of the present invention.

By referring toFIGS. 1-3, a body100of the water-cooled barbecue system1according to the preferred embodiment of the present invention can be coupled to a housing500which can be moved and assembled. The upper portion of the body100is open and the body100has a space therein. A grill300is provided inside of the body100and a heating portion120is provided at the lower portion of the grill300.

The heating portion120generates heat for heating the grill300. At a front sidewall of the heating portion120, a plurality of control knobs150are provided. The control knobs150can be disposed at an upper portion of the body100.

FIGS. 4 and 5illustrate the states of the heating portion120which can be used differently according to fuel.

If gas is used, a plurality of pipe-type burners140are arranged to be parallel with a receiving space S. The shape of the burner is not confined to this type. At the upper portion of the pipe-type burners, a plurality of radiation plates160are disposed detachably. Gas is contained in a separate fuel tank110.

If charcoal is used as the fuel, the heating portion120can be a charcoal container170for receiving charcoal. The charcoal container170is box-shaped and the upper portion thereof is open so that charcoal, firewood, briquettes, etc. can be variously contained. The charcoal container170is placed at the upper portion of the burner140after the radiation plates160are removed. On the bottom surface of the charcoal container170, a recess can be provided for the pipe-type burner140to go into. The charcoal can be exhausted continuously by air supplied from the pipe-type burner140.

Meanwhile, if the fuel is gas, the control knobs150can control the amount of heat supplied from the plural pipe-type burners140respectively. If the fuel is charcoal, the control knobs150control the amount of air supplied into the receiving place of the body100.

By referring toFIGS. 1-3again, a cooling switch portion200is provided at the front center of the body100. The cooling switch portion200operates a cooling device400to supply cooling fluid to a grill300. The cooling switch portion200and the cooling device400will be explained in detail later.

A lamp130, which is provided at a front sidewall of the heating portion120, displays the operating state of the cooling device400by the signal from the cooling switch portion200. Preferably, the lamp130is made of LED. The lamp can be provided at the cooling device400, which will be illustrated later.

A handle302(shown inFIG. 6) is attached at both sides of the upper portion of the grill300. The handle302is placed at a front-sided portion from the lateral axis of the grill, so that the user can conveniently and stably take the grill300off the water-cooled barbecue system1using the handle302. That is, if the user separate the grill300in which fluid is filled, the user can be injured due to hot water flowing out of the grill. In this event, if the user uses the handles302, since the fluid opening is directed upward, there is no concern over water flowing out of the grill.

Meanwhile, the housing500includes a cabinet510disposed at the lower portion of the body100, a shelf520provided at both sides of the body100and a cooker530. Inside of the shelf520, an auxiliary shelf522is slidingly provided. At the upper portion of the housing500, a cap570is provided to cover the body100. The cap570is hinge-assembled with the housing500.

At the corners of the cabinet510, a plurality of legs540extend downwardly. At the lower ends of the legs540, a first wheel550and a second wheel560are provided to make the housing500move. At the first wheel550, a stopper551is formed to make the housing stop.

Inside of the cabinet510, a fuel tank110and sliding shelves112,113for receiving a cooling kit410, which will be explained later, are provided respectively. Between the sliding shelf112, the cooling kit410being placed thereon, and the door of the cabinet510, a crank bar116is provided. The crank bar116makes the sliding shelf112come outside while the door of the cabinet510is open.

FIGS. 6 and 7illustrate the grill300of the water-cooled barbecue system1. By referring toFIGS. 6 and 7, the grill300includes a frame310and a fluid circulation tube320with a wave path. The frame310has a certain square-shape and is divided into upper and lower parts. At an outer sidewall311of the frame310, a first communicating hole312and a second communicating hole313are formed. At an inner sidewall314of the frame310, a plurality of recesses315are formed so that the fluid circulation tube can go through it. If the upper and lower parts of the frame are coupled together, the first communicating hole312and the second communicating hole313, which are originally in the shape of hemicycle, come to make a cycle-shaped hole.

The fluid circulation tube320is a portion supporting the meat to be roasted and forms a wave path which is arranged at an equal distance from one another in the frame310. The fluid circulation tube320is repeatedly arranged to divide the width of the grill300into at least two. While the fluid circulation tube320is being heated, since fluid circulates inside of the fluid circulation tube320, the meat is properly roasted without sticking or burning.

The fluid circulation tube320includes a first socket321and a second socket322. The first socket321and the second socket322are provided between the outer sidewall311and the inner sidewall314of the frame310. At both ends of the first socket321and the second socket322, a first through hole321aand a second through hole322a are respectively formed to communicate with the first communicating hole312and the second communicating hole313.

FIGS. 8(a)-(d) illustrate various types of fluid circulation tubes320.

By referring toFIG. 8(a) showing a one-way type fluid circulation tube320, it has a one-way fluid path communicating from the first socket321to the second socket322.

By referring toFIG. 8(b) showing a two-way type fluid circulation tube320, it has two fluid paths which are diverged from the first socket321and communicated to the second socket322in a zigzag manner.

By referring toFIG. 8(c) showing a three-way type fluid circulation tube320, it has three fluid paths which are diverged from the first socket321and communicated to the second socket322in a zigzag manner.

By referring toFIG. 8(d) showing a four-way type fluid circulation tube320, it has four fluid paths which are diverged from the first socket321and communicated to the second socket322in a zigzag manner.

Among these various types of fluid circulation tube320, a fluid circulation tube320with multi-paths has high cooling efficiency. That is, if the fluid circulation tube320has multi-paths, since the path of the fluid is shortened, the temperature of fluid is not increased much. Thus, high cooling efficiency is obtained.

FIG. 9(a) illustrates the operation of a sliding shelf112on which a cooling kit410placed. The inside of the door of the cabinet510is connected to the sliding shelf112by means of a crank bar116so that when the door of the cabinet510is opened, the sliding shelf112is withdrawn by being linked therewith. One end of the crank bar116is fixed to the inside of the door of the cabinet510, and the other end is installed to be movable along a groove118formed at the sliding shelf112.

By referring toFIG. 9(b), at the sliding shelf113on which the fuel tank110is placed, an approximately hexagonal groove119is made. By the groove119, the fuel tank110can be stably placed on the sliding shelf113.

By referring toFIG. 10, the cooling device400includes a cooling kit410which can be attached and detached outside of the body100, therein. At a sidewall of the cooling kit410, an air hole411for introducing and exhausting outside air is formed. At an upper portion of the cooling kit410, an injection hole412for injecting fluid is formed. The injection hole412has a filter416. In front of the cooling kit410, a transparent window413and a buoy418for displaying the water level therein are provided. At the bottom surface of the cooling kit410, there is a drain414for draining water with ease in case the water-cooled barbecue system1is kept for a long time without being used.

By referring toFIG. 11, the cooling device400includes a tank420, a pump430, a cooler440, a cooling fan450, and a connection hose. The tank420contains and keeps the fluid. The pump430pumps the fluid in the tank420to supply the fluid circulation tube320. The cooler440cools the fluid which has been exhausted after the circulation. The cooling fan450circulates cool air to cool down the heat of the cooler440. The connection hose460forms a supplying path from the tank420to the fluid circulation tube320via the pump430, and a returning path from the fluid circulation tube320to the tank420via the cooler440. That is, the connection hose460supplies fluid from the tank420to the fluid circulation tube320and returns the fluid, which has circulated the fluid circulation tube320, to the tank420.

According to the operation of the above constructed cooling device400, when the water-cooled barbecue system1is in use, fluid flows in the following process.

If the pump430sends cool fluid in the tank420to the fluid circulation tube320through the connection hose460, the cool fluid enters into the fluid circulation tube320via the first socket321and circulates along the path of the fluid circulation tube320. Heated fluid which has circulated the fluid circulation tube320is discharged from the second socket322of the fluid circulation tube320. This heated fluid is cooled by passing through the cooler440through the connection hose460. Thus, the fluid becomes cool when entering the tank420.

The tank420is made of transparent plastic. The tank420has a fluid supplement hole421at an upper portion thereof and a fluid exhaust hole422at one side thereof. The fluid contained in the tank420is water, coolant, etc.

The cooler440, as publicly known, includes a compressor, a condenser, an evaporator, and an expansion valve. The cooler440can be composed of a cooling part including a thermoelectric element and a power source supplying part.

The cooling fan450is driven by a fan motor451and sends cool air to the cooler440.

The connection hose460is arranged to go through the inner space of the cabinet510of the housing500. As mentioned above, the supply path of the connection hose460is connected from the tank420to the second socket of the grill via the pump430. The returning path of the connection hose460is connected from the first socket321to the fluid exhaust hole422of the tank420via the cooler440.

FIGS. 12(a)-(d) illustrate the structure of the installation of the cooling fan450.

By referring toFIGS. 12(a) and (b), the cooling fan450is installed either at the front or rear side of the cooler440so that cool air is forced to be absorbed or exhausted by the cooler440.

Also, the cooler440has two cooling fans450as shown inFIG. 12(c), or has a duct452and a cooling fan450as shown inFIG. 12(d).

FIG. 13illustrates a thermoelectric element which is to be applied to the cooler440. The thermoelectric element is a semiconductor device capable of controlling temperature by freely heating or cooling by use of direct current. An N-type device446and a P-type device448are connected by a metal442. If (+) property DC is applied to the N-type device446, electrons move from the P-type device448to the N-type device and heat is absorbed at a side with low temperature and heat is discharged at a side with high temperature.

FIGS. 14 and 15illustrate the operation of the cooling switch portion200according to the installation of the grill300.

By referring toFIGS. 14 and 15, the cooling switch portion200includes a grill sensor portion210and an operation switch portion220.

The operation switch portion220sends an operation signal to the cooling device400by the handling of the user. The grill sensor portion210senses the existence or non-existence of the grill300by a sensor (not shown) provided inside of the grill sensor portion210and sends the operation signal to the cooling device400. The cooling device400operates only if it receives both signals from the grill sensor portion210and from the operation switch portion220. That is, even if a user handles the operation switch portion220and sends the operation signal to the cooling device400, if the grill sensor portion210does not sense the grill and does not send the operation signal to the cooling device400, the cooling device400does not work. Likewise, even if the grill sensor portion210sends the operation signal to the cooling device400, if a user does not operate the operation switch portion220, the cooling device400does not work.

The grill sensor portion210includes an operation shaft211, a spring fitted around the operation shaft211, and a grill sensor switch (not shown).

The operation shaft211is provided to be in contact with the frame310of the grill300and disposed in parallel with the grill between the first communicating hole312and the second communicating hole313of the grill300.

The spring212elastically supports the operation shaft211in a lateral direction. As the spring212, a coil spring is generally used, but it is not confined to this. The spring212elastically supports the operation shaft211so that the operation shaft211can protrude outward from the cooling switch portion200till bumping with the grill.

If the grill300is positioned in place, the grill sensor switch is turned on by the pressure of the operation shaft211and sends the operation signal to the cooling device400.

That is, if the grill300is mounted on the body100, the operation shaft300bumps with the grill300and moves into the cooling switch portion200. The operation shaft211is pressed by the grill300and turns on the grill sensor switch. The grill sensor switch sends the operation signal to the cooling device400.

Meanwhile, the operation switch portion220includes a pair of fluid supply pipes221, a bracket222for supporting the fluid supply pipe221in line with the operation shaft211, a rotator223arranged at the lower portion of the bracket222, an operation knob224for rotating the rotator223, a pin225for coupling the bracket222with the upper portion of the rotator223so that the bracket222can move horizontally, and a switch (not shown) for sending an operation signal to the cooling device400after having been turned on by the rotation of the rotator223.

The pair of fluid supply pipes221are disposed to be coupled with the first communicating hole312and the second communicating hole313, respectively, and send fluid to the fluid circulation tube320of the grill300. The rotator223is a cylinder-like shaped, and has a rotation shaft223aat the center thereof and slant groove223bat a sidewall thereof. The operation knob224is provided at one end of the rotation shaft223aof the rotator223. One end of the pin225is taken by the slant groove223b. The switch is disposed inside or outside of the operation switch portion220and is turned on if the operation knob224is rotated to the working position.

A pair of fluid supply pipes221are disposed to be parallel with the operation shaft211. One end of each fluid supply pipe221is connected to the first communicating hole312and the second communicating hole313, and the other end thereof is connected to the connection hose460.

The bracket222is, in a plan view, in the shape of a T which is hollow and has a closed top. A pair of fluid supply pipes221and the operation shaft211are coupled to go through the upper wall of the bracket222and be parallel with the lower portion of the bracket222.

The rotator223is cylinder shaped and rotates by the rotation shaft223aprovided at the center thereof. At a sidewall of the rotator223, the slanting groove223bwith a certain width is formed. The rotator223is disposed at the lower portion of the bracket222and coupled with the bracket222by means of the pin225.

The operation knob224is attached to one end of the rotation shaft223aof the rotator223and rotates 180 degrees. If the operation knob224is rotated to the working position, the switch is turned on by the rotation shaft223aand sends the operation signal to the cooling device400.

The pin225is screw shaped, and the head of the pin is inserted into the bracket222at a right angle to the rotation shaft223a. One end of the pin225is inserted in the slanting groove223bof the rotator223, and moves the bracket222according to the rotation of the rotator223in the direction marked by an arrow as shown.

FIGS. 16(a) and (b) illustrate the structure avoiding the fluid from leaking out of the first socket321of the fluid circulation tube320.

By referring toFIGS. 16(a) and (b), a plunger232with a flat head portion is inserted in the first socket321of the fluid circulation tube320. The flat head portion of the plunger232is disposed toward the opening of the first socket321, i.e., the first communicating hole321a. At the outer side of the body of the plunger232, a spring234is coupled to elastically support the plunger232. In the opening of the first socket321, a bushing236is inserted. At the rear end of the bushing236, an O-shaped ring238is inserted, the inner diameter of the ring238being smaller than the head portion of the plunger232. At the outer side of the bushing236and the O-shaped ring238, a nut240is provided to be coupled with the opening of the first socket321.

In order to circulate fluid in the fluid circulation tube320of the grill300, as shown inFIG. 16(a), the fluid supply pipe221is inserted to the first socket321and presses down the protrusion232aof the head portion of the plunger232so that a fluid path is provided. Thereafter, as shown inFIG. 16(b), if the fluid supply pipe221is separated from the first socket321, the position of the plunger232is restored by the elasticity of the spring234so that the head portion of the plunger is in contact with the O-shaped ring238, the fluid path thereby being closed.

Meanwhile, although it is not shown in the figure, the second socket232of the fluid circulation tube320has the same structure as the first socket231.

FIG. 17illustrates a water-cooled barbecue system2according to another embodiment of the present invention. For the same constitution as the water-cooled barbecue system1described above, the same reference numbers are used.

The water-cooled barbecue system2has two grills300. The water-cooled barbecue system2can use the grills300independently. Also, since the water-cooled barbecue system2is large-sized, a cabinet510can additionally include a drawer580.

FIGS. 18 and 19illustrate the method for cooling the grill300of the water-cooled barbecue system2as shown inFIG. 17.

By referring toFIG. 18, if the water-cooled barbecue system2has one cooling device400, the one cooling device400supplies fluid to the two grills300. Thus, two connection hoses460are connected from the cooling device400to the grills300respectively. The two connection hoses460from the grills300are connected to the cooling device400. At this time, it is preferable that two pumps430are provided.

By referring toFIG. 19, if the water-cooled barbecue system2has two cooling devices400, one cooling device400supplies fluid to one grill300.

Also, one or two fuel tanks110are provided in the alternative.

Hereinafter, the operation of the water-cooled barbecue system according to the preferred embodiment of the present invention is described.

First, a grill300is mounted on the upper portion of the body100. The grill300can be freely mounted on or removed from the upper portion of the body100. The operation switch portion220rotates the operation knob224180 degrees.

If the grill300is placed on the upper portion of the heating portion120, the operation shaft211of the grill sensor portion210is pressed toward the inside of the cooling switch portion200by the frame310of the grill300.

If the operation shaft211is pressed, the sensor (not shown) installed inside of the cooling switch portion200works and turns on the grill sensor switch (not shown).

If the grill sensor switch is connected, an operation signal is transmitted to the cooling device400. By the above operation signal, the pump430pumps fluid from the tank420. If the cooling device400operates, the lamp130is turned on.

If the grill sensor switch is not connected, since the cooling device400does not operate, fluid cannot be supplied to the grill300. Thus, if the water-cooled barbecue system1,2is not used, an unnecessary supply of fluid or leakage of fluid, which could damage the water-cooled barbecue system, can be avoided.

After the grill300is placed over the upper portion of the heating portion120, the burner140is ignited by means of the control knob150. If the fuel is charcoal, the charcoal container170is provided at the upper portion of the burner140to heat the grill300. As such, the water-cooled barbecue system1,2can be used for the user's convenience without regard to the type of fuel.

If the operation knob224rotates, the slanting groove223bof the rotator223rotates together with it. At this time, if the slanting groove223bis observed from the upper portion of the rotator223, it appears to move to the right like the right arrow shown inFIG. 15. In the slanting groove223b, one end of the pin225is inserted and the bracket222is fixed to the upper portion of the rotator223by the pin225. Thus, if the slanting groove223bis moved in the direction marked by the right arrow inFIG. 15, the bracket222is moved in the same direction.

Accordingly, a pair of fluid supply pipes221are moved in the direction marked by the right arrow inFIG. 15by means of the bracket222, and one end of both of them is connected to the first communicating hole312and the second communicating hole313. Since the other ends of the fuel supply pipes221are connected to the cooling device400through the connection hose460, if the cooling device400works, fluid can be supplied to the grill300.

The fluid is supplied to the fuel circulation tube320through the first socket321connected to the first communicating hole312. At this time, since the fuel circulation tube320is diverged into at least two, the grill300can be cooled down more effectively.

The fuel, which has circulated by divergence from the first socket321, is exhausted through the second socket322. The second socket322is connected to the connection hose460through the second through hole322aand the second communicating hole313. The fluid is returned to the tank420through the cooler440in the cooling kit410. The cooler440cools fluid by the operation of the cooling fan450. The cooling fan450introduces cool air to the inside of the cooling kit410and discharges the heated air to the outside of the cooling kit410.

The cooling kit410has a transparent window413and a buoy418to check the water level in the tank420. The user can control the supply amount of fuel by checking up the water level from the buoy through the transparent window413.

If the water-cooled barbecue system1,2is not used, the burner140or charcoal is extinguished and the grill300is removed. If the grill300is removed, the pressure of the operation shaft210is released and the grill sensor switch is disconnected by the sensor. Accordingly, the cooling device400stops working and no more fluid is supplied to the grill300.

If the grill300is to be moved or removed from the water-cooled barbecue system1,2, since the structure avoiding the leakage of fuel is provided at the first socket321and the second socket322of the fuel circulation tube320of the grill300, the user can perform it in a stable manner.

The aforementioned water-cooled barbecue system1,2can be used outdoors by being assembled with the housing500, and can be used indoors by being separated from the housing500. Since the shelf520, the auxiliary shelf522and the cooler530are provided at both sides of the housing500, the user can utilize the water-cooled barbecue system1,2for various purposes when preparing and cooking foods thereon.