80results about "Water heating stoves/ranges" patented technology

The utility model relates to the technical field of frying stoves, in particular to a frying stove with a waste heat recovery function, which comprises a transverse plate and a faucet, a round opening in the upper portion of the outer wall of the transverse plate is fixedly connected with the outer wall of the faucet, the rear end face of the faucet is communicated with a straight pipe, the frying stove is fixedly connected to the bottom of the transverse plate, and stand columns are fixedly connected to four corners of the bottom of the frying stove respectively. The bottom of the stand column is connected with a recovery structure, square blocks are fixedly connected to the left side and the right side of the frying stove correspondingly, and heat is transferred downwards through a copper material of a vertical rod in the recovery structure (the outer wall of the vertical rod leaking between the frying stove and the top of the shell is wrapped with ceramic fibers, so that the heat preservation effect is achieved, and heat is prevented from being diffused at the leaking position of the vertical rod; and the water source is gradually heated by the transferred heat, so that the waste heat of the frying stove is recovered, the normal heating of the water source at the bottom of the water tank is ensured, and the heat recovery of the frying stove for waste heat recovery is increased.

The utility model discloses a dual-purpose heating stove which comprises a gas stove, a cooking bench, rails, a rail frame, a water tank, a pipeline support, a water pipe, a water tank support and a heat insulation safety handle, the cooking bench is arranged on an upper table top of the gas stove, the rails are laid on the two sides of the cooking bench, and the water tank is installed on the rails in a butt joint mode through the rail frame and communicated with the water pipe. According to the dual-purpose heating stove, during heating, the water tank heat exchange system slides to the position over the table top of the cooking bench through the rails, and during cooking, the water tank heat exchange system slides to the rear side, the water tank heat exchange system is arranged on the water tank support, and the water tank support is arranged on the water tank support; the alloy heat conduction disc conducts rapid heat conduction operation when the water tank is heated, rapid temperature rise of the water tank is facilitated, the water tank is arranged to be movable, the water pipe is externally connected with a metal hose capable of moving by a certain distance, the metal hose is installed in an inner groove of the U-shaped pipe support in an embedded mode and tightened and positioned through a tightening bolt, and a bearing plate of the pipeline support serves as a structural bearing of the metal hose.

The invention discloses an efficient, energy-saving, environment-friendly, oxygen-increasing and combustion-supporting fuel gas and fuel oil dual-purpose multifunctional energy-saving stove unit, which belongs to the technical field of energy-saving stoves and comprises a cooking bench, a stove opening, an interlayer combustion cavity, an automatic electronic ignition and premixing type oxygen-increasing, combustion-supporting and energy-saving cyclone furnace end and an energy-saving gas and fuel oil dual-purpose energy-saving stove body arranged on the inner wall of the interlayer combustion cavity and above and below the interlayer combustion cavity. The system comprises an interlayer combustion cavity, a spiral heat exchange coil pipe with the periphery communicated, an interlayer multi-pipe tail gas emission flue waste heat utilization system communicated with the interlayer combustion cavity, an energy-saving rice steaming cabinet which is communicated with the interlayer combustion cavity and is provided with an energy-saving combustion or heating and heating system and an automatic pressure release valve, and a noise reduction steam recycling system communicated with the energy-saving rice steaming cabinet. The floating ball or the electronic high-low water level intelligent control system is communicated with the interlayer combustion cavity and the noise reduction steam recycling system, and the carbon and sulfur capturing device, the tail gas multi-element catalysis device, the net zero emission system and the interlayer combustion cavity overall outer heat preservation structure are communicated with a tail gas emission flue.

The utility model belongs to the technical field of gas stoves, and particularly discloses a waste heat recovery type gas stove which comprises a shell, a hearth is formed in the shell, a mounting base is arranged at the bottom of the hearth and used for mounting an ignition structure, a partition plate is detachably connected in the hearth, a heat exchange cavity is formed between the partition plate and the shell in a spaced mode, and the heat exchange cavity is communicated with the hearth. A heat exchange pipe is detachably connected in the heat exchange cavity, and a first through hole for the heat exchange pipe to penetrate through is formed in the shell; the top of the mounting base is provided with a flue communicating with the heat exchange cavity, and the shell is provided with a smoke outlet communicating with the flue. The heat exchange cavity is formed by the partition plate and the shell, the heat exchange pipe is arranged in the heat exchange cavity, smoke generated by combustion of the gas stove enters the heat exchange cavity and then exchanges heat with water in the heat exchange pipe, and part of heat generated by combustion in a hearth enters the heat exchange cavity through the partition plate and further exchanges heat with the heat exchange pipe. Flue gas flowing distance is reduced, heat loss is effectively reduced, and waste heat utilization efficiency is improved.

The invention relates to the technical field of heat recovery, in particular to a multi-layer cross flow guide type heat recovery device which comprises a waste heat recovery box used in cooperation with a cooking bench, a cooking range and a flow guide channel, an exhaust port formed in the top of the waste heat recovery box, an adjusting knob rotationally connected to the cooking bench and a metal flow guide pipe arranged in the waste heat recovery box. The transmission assembly is arranged on the cooking bench, the adjusting assembly is arranged in the waste heat recycling box, and the opening and closing assembly is arranged on the adjusting assembly; according to the waste heat recovery device, the fire power is controlled through the adjusting knob, and meanwhile, the distance between the adjusting assembly and the metal flow guide pipe can be controlled, so that the requirement of flue gas on the efficiency of passing through the waste heat recovery box under different fire powers is met; and potential safety hazards caused by pressure rise in the cooking range due to low smoke passing efficiency under the condition of large fire are prevented.

A control method of a cooking apparatus. The control method of the cooking apparatus includes controlling an operation of the water supply pump to supply water to the steam generator, controlling an operation of the water supply pump for a period of time to additionally supply water to the steam generator when a level of water supplied to the steam generator reaches a position. The method includes controlling an operation of a drain pump to discharge the water from the steam generator when the period of time expires, and respectively controlling an operation of a steam heater installed in the steam generator and a bottom heater installed on a bottom surface of the cooking apparatus, when the level of the water in the steam generator reaches the position at which the water is discharged from the steam generator.

The utility model discloses a gas waste heat automatic recovery energy-saving device which comprises a cooking bench body and supporting legs. The gas stove has the advantages that the heat conduction water tank and the heat conduction cavity are arranged, when the gas stove is used, generated high-temperature flue gas can be collected by the collecting cover above and guided into the snake-shaped heat conduction pipe in the heat conduction water tank in a centralized mode through multiple sets of pipelines, the retention time of the flue gas can be prolonged through the bent structure of the snake-shaped heat conduction pipe, and the heat conduction efficiency of the gas stove is improved. In addition, the heat generated by the use of the cooking bench can be transmitted to the heat conduction fins through the bench surface and diffused into the water body in the heat conduction cavity through the heat conduction fins, the types of waste heat utilization can be effectively enriched through the cooperative use of multiple groups of different structures, and the utilization rate of waste heat is improved. The waste heat recovery range is expanded, the overall waste heat recovery effect is improved, and the waste heat recovery device has the advantages of being wide in waste heat recovery range, good in waste heat recovery effect and capable of achieving multi-type recovery.

A control method of a cooking apparatus. The control method of the cooking apparatus includes controlling an operation of the water supply pump to supply water to the steam generator, controlling an operation of the water supply pump for a period of time to additionally supply water to the steam generator when a level of water supplied to the steam generator reaches a position. The method includes controlling an operation of a drain pump to discharge the water from the steam generator when the period of time expires, and respectively controlling an operation of a steam heater installed in the steam generator and a bottom heater installed on a bottom surface of the cooking apparatus, when the level of the water in the steam generator reaches the position at which the water is discharged from the steam generator.

An object of the present disclosure is to provide a heating cooker that reduces a decrease in temperature in a heating chamber when water is supplied to a water supply body and quickly heats and cooks an object to be heated.SOLUTION: A heating cooker according to the present disclosure includes a heating chamber that houses an object to be heated, a circulation fan that air in the heating chamber, blows out the sucked air into the heating chamber, forms a circulation flow path in an internal space of the heating chamber, and serves as an air blowing source, a convection heater that heats the air sucked from the circulation fan, a supply body that supplies water to the air heated by the convection heater, and a water tank that supplies water to the water supply body, and includes a water heating mechanism that heats or keeps warm water supplied to the water supply body by using waste heat of the heating chamber.SELECTED DRAWING: Figure 5

The heat recovery device comprises a cooking bench and the cooking range, a wall surface is arranged on the rear side of the upper end of the cooking bench, a flue is fixedly installed at the front end of the wall surface, a spiral metal pipe is arranged in an inner cavity of the flue, a water inlet pipe is fixedly installed at the left end of the flue and communicated with the spiral metal pipe, and a water outlet pipe is fixedly installed at the right end of the flue and communicated with the spiral metal pipe. And a water outlet end is arranged at the right end of the spiral metal pipe. The problem that the heat recovery efficiency is reduced due to impurities in flue gas is solved. According to the technical scheme, the heat recovery device of the cooking range is provided. Impurities in flue gas are filtered by the filter screen, and the filter screen can prevent the impurities from being attached to the heat recovery device, so that efficient operation of equipment is kept. Therefore, the heat recovery efficiency is improved, and the heat recovery effect is guaranteed.

The invention discloses a low-power heat preservation type electrothermal furnace plate capable of utilizing waste heat, and relates to the technical field of electrothermal furnace plates, the low-power heat preservation type electrothermal furnace plate comprises a first mounting plate, a heat insulation material, a heating wire, a microcrystalline glass plate, a second mounting plate, a temperature sensor and a controller, a mounting cavity is formed in the middle of the right end of the first mounting plate, and a first motor is fixed in the mounting cavity; a rotating disc is fixed to the output end of the first motor, the bottom end of a broken line pipe is installed in the rotating disc in a threaded connection mode, a water inlet pipe is arranged in the broken line pipe, a first spray head is fixed to the top end of the water inlet pipe, and a telescopic hose is fixed to the bottom end of the water inlet pipe. According to the low-power heat preservation type electrothermal furnace plate capable of utilizing the waste heat, water heated by the waste heat is used for heat preservation of objects, the heat exchange effect is improved by enlarging the spraying area of the water and delaying the water flow speed to prolong the contact time, and therefore the waste heat utilization effect is improved, and the distance between the objects on the containing plate and warm water can be controlled.

The commercial kitchen air conditioner is applied to the field of kitchen cooling systems and comprises a water cooling unit arranged at the bottom of a cooking range, the water cooling unit is used for generating cold air and provided with a water inlet pipe communicated with a tap water pipeline, and the output end of the water cooling unit is provided with an output unit used for outputting the cold air. And the air outlet end part of the output unit extends out of the cooking range and is arranged towards the chef station. The water cooling unit has the technical effects that the whole water cooling unit is integrated below the cooking bench, external installation is not needed, the space utilization rate of a kitchen is increased, the air supply distance and the cooling capacity loss are reduced, meanwhile, tap water is used as cooling water, the cooling capacity loss is small, the water cooling unit can further extract the heat capacity in the tap water, the condensation effect is remarkably improved, and energy is saved. Refrigeration circulation and efficient utilization of water resources are combined, energy consumption and water resource waste are reduced while the kitchen temperature is reduced, and effective utilization of the resources is achieved.

The utility model relates to the technical field of kitchen waste heat recycling, in particular to a heat recovery device for a hot frying cooking bench, which comprises a cooking bench component, the cooking bench component comprises a base and a ventilator arranged at the top of the base, and smoke generated when the cooking bench works can be exhausted from the ventilator; the heat exchange component comprises a water tank and a heat conduction component, the water tank is arranged at the top of the ventilation barrel, the bottom of the heat conduction component is connected with the ventilation barrel, a side heat release part of the heat conduction component extends into the water tank, the bottom of the heat conduction component is communicated with the ventilation barrel, and smoke can flow into the heat conduction component from the ventilation barrel. The heat release part on the side face of the heat conduction component extends into the water tank, heat of the flue gas extends into water in the water tank, heat exchange naturally occurs, moisture in the water tank absorbs the heat of the flue gas in the heat conduction component to be heated, and the flue gas releases heat and is cooled.

The utility model discloses a heat energy circulation energy-saving small fuel gas frying stove, which belongs to the technical field of small fuel gas frying stoves, and comprises a small frying stove shell, a fire-resistant flange, a water baffle, a water faucet, a water containing barrel and an ignition assembly. Water in the water containing barrel can be heated through the ignition temperature, so that the temperature of the water can be increased, clear water does not need to be independently heated, and the purpose of saving energy is achieved; fuel gas is provided through the arranged ignition assembly and fuel gas hose, ignition is conducted through the igniter, and external air can be fed into the center of the ignition stove through the air blower and sprayed outwards; and gas is provided through the arranged adjusting assembly and the gas hose, ignition is conducted through the igniter, external air can be fed into the center of the ignition stove through the air blower and sprayed outwards, and therefore sufficient oxygen can be provided for combustion.

The utility model discloses an integrated stove suitable for making breakfast for old people, and relates to the field of integrated stoves. The existing kitchen stove does not fully consider the special requirements of old people on liquid food and breakfast in design and function. The cooking range comprises a cooking range body and a range hood head, the cooking range body is provided with a steaming oven and a water tank, an intelligent control panel and a wall breaking machine with a heating function are arranged on the front side of a cooking bench on the cooking range body, the wall breaking machine is communicated with the water tank through a pipeline and an electromagnetic valve, and the control panel is electrically connected with the wall breaking machine and the electromagnetic valve. The wall breaking machine is integrated on the integrated cooker, wall breaking and juicing of food materials can be conveniently achieved, water in the water tank can be conveniently and automatically added into the wall breaking machine for juicing and heating through the control panel, and appointment operation of water injection, wall breaking and juicing and heating can be conducted through the intelligent control panel. The device can provide convenient one-stop liquid food breakfast making for the elderly, simplify the cooking process of breakfast for the elderly, and improve the convenience and efficiency of breakfast making for the elderly.

The utility model relates to the technical field of gas stoves, and discloses an energy-saving gas stove which comprises a cooking bench, a cooking range support is fixedly connected to one side of the upper end of the cooking bench, an energy-saving structure is arranged on the cooking bench, adjusting structures are arranged at the front end and one side of the cooking range support respectively, and the energy-saving structure comprises a heat exchanger. The heat exchanger is placed in the cooking bench, the side, close to the center of the cooking bench, of the heat exchanger is fixedly connected with a conveying pipeline, and one side of the conveying pipeline is fixedly connected with a connecting pipeline. According to the utility model, heat exchange can be carried out on high-temperature gas during gas combustion through the heat exchanger, so that the heated gas is used for heating water in the water tank base, the cooking time is shortened, the gas can be used for hand warming or heat preservation treatment, and heat generated during gas combustion can be recycled and reused conveniently; the air flow of the ventilation groove can be adjusted through the multiple fan-shaped baffles, and it is ensured that oxygen is fully supplied in the fuel gas combustion process.

The utility model relates to the technical field of energy-saving stoves, and solves the problems that when tools on a cooking bench are placed, the tools are placed disorderly, and the placed tools are easy to fall off, so that the tools on the cooking bench are damaged. The commercial energy-saving stove comprises a cooking bench, a mounting groove is formed in one side of the surface of the cooking bench, a cooking bench igniter is fixedly mounted in the mounting groove, a sliding groove is formed in one side of the interior of the mounting groove, a gas guide pipe is fixedly mounted in the sliding groove, and a recovery pump is fixedly mounted at one end of the gas guide pipe; an output pipe is fixedly installed at one end of the recovery pump, a storage frame is fixedly installed at one end of the output pipe, a connecting pipe is fixedly installed on one side of the surface of the storage frame, one end of the connecting pipe is connected with a cooking bench igniter, and a placing assembly is fixedly installed on the surface of the sliding groove and comprises a placing plate fixedly installed on the surface of the sliding groove; a supporting plate is fixedly installed on one side of the surface of the containing plate.

The present invention discloses a device that integrates the functions of a gas stove, an air conditioner, and a water heater, comprising a motor, a clutch, an air compressor, an expander, a fuel injector, a steam generator, a three-way valve, an air inlet, a combustion chamber, a flame outlet, a heat exchanger, a water heater, a stove, a heat exchange tube in the water heater, a heat exchange tube in the steam generator, a condenser, a rotating shaft, a working fluid delivery pipe, an indoor radiator, a fan, a water inlet, a water outlet, a transmission line, a battery, a working fluid pump, a flame channel, and a combustion chamber wall. Compared with the prior art, the present invention has the following advantages: a simple overall structure; by using an expander or a steam turbine to increase the pressure of the air compressor and the temperature of the combustion chamber, the gas stove, air conditioner, and water heater are combined into one; the heat generated by natural gas combustion is comprehensively utilized to improve energy efficiency; and the present invention has wide applicability and is easy to promote.

The utility model provides a multipurpose stove with a timing function. The multi-purpose stove with the timing function comprises a shell, a partition plate is fixedly installed in the shell, two combustion shells are fixedly installed on the inner wall of the top of the shell, stove cores are fixedly installed in the combustion shells, a gas distribution box is fixedly installed on the inner wall of the top of the shell, two adjusting knobs are installed on the gas distribution box, and the two adjusting knobs are fixedly installed on the inner wall of the top of the shell. The top of the adjusting knob is located outside the shell, gas conveying pipes are fixedly installed on the two sides of the gas distribution box correspondingly, one ends of the two gas conveying pipes are fixedly connected with the stove core correspondingly, electromagnetic valves are installed on the gas conveying pipes, a gas inlet pipe is fixedly installed on one side of the gas distribution box, one end of the gas inlet pipe extends out of the shell, and the other end of the gas inlet pipe extends out of the shell. And an air inlet valve is fixedly mounted on the air inlet pipe. The multipurpose stove with the timing function, provided by the utility model, has the advantages that the stewing duration can be timed when food is stewed, and the safety performance of the stove in use is improved.

The utility model discloses a direct-discharge type fuel gas energy-saving waste heat recovery steam large cooking range, which belongs to the field of cooking ranges and comprises a furnace pipe, a furnace end connected with a controller is arranged in the furnace pipe, a frying pan is mounted above the furnace pipe and positioned right above the furnace end, the furnace pipe comprises a furnace pipe shell and a furnace pipe inner wall, a flue gas downward hole is formed in the furnace pipe inner wall, and a flue gas downward hole is formed in the furnace pipe inner wall. A water chamber is formed between the inner wall of the boiler furnace and the boiler furnace shell, a waste heat recovery device is arranged in the water chamber and comprises a hollow body, a smoke inlet pipe communicated with the interior of the body and the smoke downstream hole is arranged on the body, a smoke outlet pipe communicated with the interior of the body is arranged on the side face of the body, and the body and the smoke outlet pipe are provided with a plurality of water flow circulating pipes. High-temperature flue gas flowing through the body is cooled through the water flow circulating pipe, water is evaporated to generate steam to provide a heat source for other devices, tail gas waste heat is utilized, and the purpose of saving energy is achieved.

The utility model discloses an integrated cooker with a flue inner cavity cleaning system, and relates to the field of integrated cookers. A traditional integrated cooker is relatively troublesome to clean, stubborn oil stains in an internal flue and an extractor hood are difficult to thoroughly remove, bacteria are easy to breed, peculiar smells are easy to generate, and environmental sanitation of a kitchen is threatened. The range hood comprises a stove body and a range hood head, the stove body and the range hood head are internally provided with flue inner cavities which are communicated up and down, the top of the flue inner cavity of the range hood head is provided with a plurality of atomized water vapor nozzles, the stove body is provided with a water tank, the water tank is communicated with the atomized water vapor nozzles through a heating flow guide pipe, the heating flow guide pipe is connected with a water suction pump, and the bottom of the flue inner cavity is connected with a blow-off pipe. And a peristaltic pump is arranged on the blow-off pipe. Water in the water tank is heated through the heating flow guide pipe and the water suction pump and pumped to the atomized water vapor spray head, high-temperature water vapor is sprayed to the inner wall of the flue inner cavity, sewage flowing to the bottom of the flue inner cavity is discharged through the peristaltic pump, oil stains and impurities on the inner wall of the flue inner cavity can be effectively cleaned, and the cleaning effect of the integrated cooker is improved.

The utility model discloses an anti-heat-conduction large cooking stove which comprises a large cooking stove assembly and a waste heat recovery assembly arranged on the right side of the large cooking stove assembly. The large cooking stove assembly comprises a heat insulation operation panel, a pot rack main body, a first gas guide pipe, a faucet valve, a pot body, a combustion valve body, a stainless steel annular heat insulation cover, a stove chamber body, an air blower, an observation window and an observation guide pipe, and the waste heat recovery assembly comprises a heat preservation cover, a spring, a handle, a sliding groove, a sliding block, a fixing rod, a smoke purification box and a second gas guide pipe. The heat-conduction-preventing large cooking range has the advantages of being long in service life and good in heat-conduction-preventing effect, and solves the problems that when a large cooking range is used, the heat insulation effect is poor, heat insulation is achieved in a hearth of the large cooking range in a mud pasting mode, the service life of the large cooking range is shortened after a long time, and when smoke is exhausted, the functions of recycling, purifying and reusing are not achieved. And the applicability is poor when the kitchen is used.

The utility model relates to the technical field of heating equipment discloses a hydrogen alcohol heating stove, including the organism, the organism includes hearth, sets up the heat exchange pipe in hearth, sets up the burner that heats in hearth bottom and adds the hydrogen alcohol fuel of hydrogen alcohol fuel supply module that provides with burner connection, sets up the flue gas condenser that collects the flue gas of hearth discharge in the organism and provides oil module, sets up the flue pipe between hearth and flue gas condenser, and sets up the flue gas exhaust mechanism that flue gas is discharged to outside in flue gas condenser, the side wall of organism is equipped with water outlet and water inlet, flue gas condenser includes the smoke box and sets up the condenser pipe in the smoke box, and the outlet of condenser pipe is linked together with the import of heat exchange pipe, and the import of condenser pipe links together with water inlet, and the export of heat exchange pipe links together with water outlet, the shape of smoke box is U type, and the shape of condenser pipe is spiral fin shape. With this, it is favorable to flue gas waste heat heat exchange, and the time of heat exchange with flue gas can be prolonged and the area of heat exchange with flue gas can be increased to improve the heat exchange efficiency.

The invention relates to the technical field of gas stove devices, in particular to an energy-saving and environment-friendly gas stove which comprises a water tank, a ventilation cylinder and the like. A ventilation cylinder is fixedly connected to the water tank, a battery is arranged on the water tank, a faucet is arranged on the water tank, and a plurality of ventilation openings are formed in the ventilation cylinder. During outdoor use, a second supporting rod is twisted downwards, a supporting ring is driven to move downwards to be attached to the ground, then a locking bolt is tightened, the second supporting rod and the supporting ring are both stably attached to the ground, the overall gravity center of the gas tank is remarkably reduced, and the risk that the gas tank topples over is reduced; the anti-toppling capacity and the overall stability of the pot when the pot is used outdoors are greatly improved, during cooking, the height of the supporting cover and the height of connecting parts of the supporting cover are allowed to be manually adjusted up and down by unscrewing a fastening screw of the telescopic rod, the height of the pot is made to be matched with the height of an operator, and manual operation comfort and safety are improved.

This invention belongs to the field of waste heat utilization technology for stoves, specifically relating to a universal waste heat exchanger. The invention includes a hot water tank and, sequentially arranged along the flue gas path, an inlet pipe, a heat exchange jacket, a heat exchange coil, and a waste gas discharge pipe. The heat exchange jacket is located within the cavity of the hot water tank, and the inlet pipe penetrates the hot water tank and connects to the inlet of the heat exchange jacket. The heat exchange jacket and the heat exchange coil are coaxially arranged, and the outlet of the heat exchange jacket connects to the inlet of the heat exchange coil. The outlet of the heat exchange coil connects to the waste gas discharge pipe. This invention can maximize the efficient utilization of waste heat within the stove while meeting the normal heating requirements of the stove.

The utility model discloses waste heat recycling equipment on an energy-saving stove, which belongs to the technical field of waste heat recycling of the energy-saving stove and comprises the energy-saving stove, an annular plate is fixedly connected to the top side of the energy-saving stove through screws, an annular cylinder is fixedly connected to the inner wall of the annular plate, and a storage ring is fixedly connected to the top side of the annular cylinder. A combustor is installed in the middle of the top side of the energy-saving stove, an arc ring frame is fixedly connected to the outer wall of the bottom end of the combustor, the outer diameter of the arc ring frame is the same as the inner diameter of the annular barrel, one side of the annular barrel is fixedly connected with a circulation box in a communicating mode, and the top side of the circulation box is fixedly connected with a water inlet pipe in a communicating mode. The energy utilization efficiency of the energy-saving stove can be effectively improved, the cooking cost is reduced, the working efficiency of a kitchen is improved, and the energy-saving stove has dual functions of environmental protection and economy and has certain practicability.

The utility model provides a heat exchange unit for recovering waste heat of kitchen oil fume, which is surrounded by a heat exchange cavity for oil fume to flow through, and a heat exchange pipe is arranged in the heat exchange cavity. The heat exchange tube is a flat tube and is structurally thinner than a tube cavity of a circular heat exchange tube in the background technology, and oil smoke can transfer heat of the oil smoke to the central axis of the tube cavity from the tube wall to heat all parts of the tube cavity. When cold water flows in the heat exchange pipe, oil smoke can heat the cold water in all positions, close to the pipe wall, the center of the pipe cavity and the like, in the heat exchange pipe, and the heating effect is good.

The present invention relates to a cooking appliance for a large-scale kitchen in the form of a combi-steamer (1, 1'), having a cooking compartment (3) for cooking food which is to be cooked, which can be arranged on a plurality of cooking levels (32), or a rotisserie appliance, having a cooking compartment for cooking food which is to be cooked, which can be arranged on a rotatable carrier, having a heating device for heating the cooking compartment atmosphere, an appliance controller for controlling the cooking appliance, and a cooking compartment drain (33) which is located below a floor (4) of the cooking compartment (3) and serves for conducting away a fat / water mixture and gaseous portions of the cooking compartment atmosphere out of the cooking compartment (3), wherein the cooking compartment drain (33) extends from an outlet opening (15) in the floor (4) or in the floor region of the cooking compartment (3) as far as a siphon device (35), wherein a fat-collecting device (59) is provided which comprises at least one fat-collecting container (61), at least one fat extraction line (73), at least one extraction pump (77) and at least one fat discharge line (82), wherein the fat extraction line (53) extends from the fat-collecting container (61) to the extraction pump (77), wherein the extraction pump (77) is configured to further convey the fat / water mixture sucked up via the fat extraction line (73) into the fat discharge line (82), and wherein a cleaning device is provided which is configured to convey water at least via the fat extraction line (73) and the fat-collecting container (61) into the cooking compartment drain (33) in the direction of the siphon device (35).