RU194171U1 - Steam-convection apparatus - Google Patents

Abstract

The claimed technical solution relates to the field of kitchen heating equipment intended for public catering enterprises, and can be used both independently in various modes and as part of a food processing line. A steam-convection apparatus contains a housing and a heat-insulated working chamber with a door and shelf holders placed in the working chamber, a fan and heating elements, as well as a steam generator, a water supply and sanitation system, b control window with a touch control panel, a collector outlet pipe inserted into the opening of the working chamber, located coaxially with it, forming a channel for heated air to enter the external environment, the working chamber forms a working cavity with communicating air inlet and outlet channels, where the air inlet channel is from the external the medium is formed by performing an inlet pipe inserted into an opening made in the working chamber, the inlet pipe is made with a damper, on the working surfaces of the impeller an electric additional blades are made of the engine, an injector is made in the working chamber, which cools the working chamber by cold water injection. The technical result of the claimed utility model is to expand the functionality of the steam-convection apparatus, which is achieved by using a cooling system design that allows cooling the working chamber without opening its doors, which increases the productivity of the device and the productivity of personnel of enterprises in society food (school canteens, cafes, restaurants, shops, etc.) in the process of cooking, the consequence of which is to increase the safety of staff at the workplace and the efficiency of the cooking process, improving the quality of prepared dishes and the operational characteristics of the device. 2 s.p. f-ly, 8 ill.

Description

The claimed technical solution relates to the field of kitchen heating equipment intended for public catering enterprises and can be used both independently in various modes and as part of a food processing line.

The closest technical solution (prototype) is a steam-convection apparatus (RF Patent No. 82101, A47J 27/04, publ. 04/20/2008) containing a housing installed on the base and an insulated working chamber with a door and shelf holders placed in the working chamber, a fan and heating elements, as well as a steam generator, water supply and sanitation system, a control unit with a touch control panel, a collector, an outlet pipe of the collector inserted into the opening of the working chamber, forming a channel for the exit of heated air .

The disadvantage of the prototype: low functionality steam-convection apparatus due to the inability to effectively cool the working chamber without opening its door.

A technical problem to be solved by creating a steam-convection convection apparatus is that for cooling the working chamber, for example, between the stages of cooking different dishes, between the stages of cooking the same dish, and also during cooking when the device is running, it is necessary to force open the door -convective apparatus, which reduces the performance of the device and the operator, as it takes some time to cool the cooking chamber. When cooling the working chamber with the door closed, the operator can perform other work. In addition, an open working chamber can contribute to thermal burns (scalding) by catering personnel due to hot air (steam) exiting the working chamber. Also, from the point of view of cooking technology, frequent opening of the door of the working chamber can reduce the quality of the prepared products due to a sharp decrease in temperature from high to lower (for example, from temperature (plus) 180 ° C to temperature (plus) 130 ° C).

The technical result of the claimed utility model is to expand the functionality of the steam-convection apparatus, which is achieved through the use of a cooling system design that allows cooling the working chamber without opening its door, which increases the device’s productivity and the productivity of catering staff (school canteens, cafes, restaurants, shops, etc.) in the process of cooking, resulting in increased safety the work of personnel at the workplace and the efficiency of the cooking process, improving the quality of prepared dishes and the operational characteristics of the device.

The technical result is achieved by the fact that the steam-convection apparatus contains a base installed on the base and a heat-insulated working chamber with a door and shelf holders located in the working chamber, a fan and heating elements, as well as a steam generator, water supply and drainage system, a control unit with a touch control panel, the outlet pipe of the collector inserted into the opening of the working chamber, located coaxially with it, forming a channel for the outlet of heated air to the external environment, the inner chamber forms a working cavity with communicating air inlet and outlet channels, where the air inlet channel from the external environment is formed by making an inlet pipe inserted into an opening made in the working chamber, the inlet pipe is provided with a shutter, additional blades are made on the working surfaces of the electric impeller, a nozzle is made in the working chamber, which cools the working chamber by injection of cold water. In this case, the inlet pipe is made with a L-shaped profile. When this shutter is made rotating.

New significant distinguishing features of the proposed technical solution are the following features:

the implementation of the working chamber, forming a working cavity with communicating channels of the inlet and outlet of air;

an air inlet channel from the external environment is formed by making an inlet pipe inserted into an opening made in the working chamber;

the inlet pipe is made with a shutter;

additional blades are made on the revolving surfaces of the impeller of the electric motor;

a nozzle is made in the working chamber, which cools the working chamber by injection of cold water.

The combination of new significant distinguishing features with the features known from the prior art is sufficient to solve the indicated technical problem and to obtain the technical result provided by the utility model - expanding the functionality of the steam-convection apparatus, which is achieved due to the possibility of cooling the working chamber without opening its door when the electric motor is running. the proposed utility model, its feasibility and the possibility of industrial application are illustrated by the feature hedgehogs, where:

in FIG. 1 is a general front view of a steam-convection apparatus in an axonometric projection;

in FIG. 2 - left view;

in FIG. 3 - rear view;

in FIG. 4 - view from the right;

in FIG. 5 is a diagram of the cooling of the working chamber;

in FIG. 6 - arrangement of additional impeller blades;

in FIG. 7 - shutter;

in FIG. 8 - the location of the "umbrella".

The following symbols are indicated on the drawings:

1 - base;

2 - case;

3 - working chamber;

4 - door;

5 - glass;

6 - a handle with a lock;

7 - a partition;

8 - fan;

9 - air heating elements;

10 - temperature sensor;

11 - working cylinder thermal switch;

12 - electric motor;

13 - holders;

14 - shelves;

15 - incandescent lamps;

16 - “umbrella”;

17 - washing pump;

18 - washing bath;

19 - pipeline;

20 - ball valve;

21 - ball valve;

22 - pump (dispenser);

23 - temperature sensor;

24 - a stub;

25 - mounting plate;

26 - control panel;

27 - electromagnetic valves;

28 - steam generator;

29 - nozzle;

30 - thermal switch;

31 - collector;

32 - drainage collector;

33 - internal compartment for controlling the liquid level of the steam generator;

34 - thermal switch;

35 - input channel;

36 - output channel;

37 - inlet pipe;

38 - hole of the working chamber;

39 - inlet flap;

40 - gearmotor;

41 - shaft;

42 - cam;

43 - microswitch;

44 - button;

45 - controller relay board;

46 - hole of the working chamber;

47 - output pipe of the collector;

48 - the upper surface of the steam-convection apparatus;

49 - reverse surfaces;

50 - impeller;

51 - additional blades;

52 - fan;

53 - heat sink.

Steam-convection apparatus, a general view of which is shown in FIG. 1, comprises a housing 2 (FIG. 1) mounted on the base 1 (Fig. 2) of stainless steel according to GOST 5632 with a working heat-insulated chamber 3 made of corrosion-resistant steel made in it, for example, grade 12X18H10T. On the front side of the housing 2 there is a door 4 with double glass 5 (outer glass and inner glass). The door 4 has a handle 6 with a lock made with a two-stage opening mechanism. The inner glass of the double glass 5 of the door 4 is made on hinges with the possibility of opening for cleaning. The door 4 is made with the possibility of opening at an angle of up to 190 ° and fixing it at an angle of 135 ° to prevent personal injury and glass breakage 5.

The internal volume of the working chamber 3 is divided into a technological zone (not shown in FIG.) And a working zone (not shown in FIG.) By means of a partition 7 (FIG. 1, 5).

In the technological zone (not shown in Fig.): Fan 8 (Fig. 4), providing uniform mixing of air in the working chamber 3 (Fig. 1) during operation of the steam-convection apparatus, tubular air-heating elements (air heating elements) 9 ( Fig. 4), a temperature sensor 10 and a working cylinder 11 of the temperature switch 34 (Fig. 2, 3). Air heating elements 9 (Fig. 4) according to GOST 13268 with a power of 27 kW in an amount of, for example, 6 pieces, located around the fan 8 and at a certain equal distance from it, are designed to heat the air in the working chamber 3 (Fig. 1) when working in a double boiler -convective apparatus. The implementation of air TENOV 9 (Fig. 4) around the fan 8 at an equal distance ensures uniform receipt of thermal energy from them, contributing to a more uniform heating of the working chamber 3 (Fig. 1), which improves the quality of the prepared products (food). The contacts of the temperature sensor 10 (Fig. 4), designed to control the temperature in the working chamber 3 (Fig. 1), are connected to the controller 45 (Fig. 2) of the relay board. The working cylinder 11 (Fig. 4) of the thermal switch 34 (Fig. 2, 3) is connected via a capillary tube (not shown in Fig.) To the housing of the thermal switch 34 (Fig. 2, 3), which, when the temperature reaches more than (plus) 320 ° C in the working chamber 3 (Fig. 1) de-energizes the control circuit (not shown in Fig.) And prevents temperature overheating and an emergency. The temperature in the working chamber 3 (Fig. 1) is maintained automatically by means of a thermostat (not shown in Fig.) With a temperature control range from (plus) 30 to (plus) 320 ° C. The fan drive 8 (Fig. 4) is carried out from a standard electric motor 12 (Fig. 2), with a power of, for example, 0.37 kW, which is mounted on the side wall of the technological zone (not shown in Fig.) Of the working chamber 3 (Fig. 1) . The start of the electric motor 12 (Fig. 2) occurs according to the algorithm laid down in the steam-convection apparatus. The air circulation in the working chamber 3 (Fig. 1) is ensured by suction by the fan 8 (Fig. 4) of air from the working chamber 3 (Fig. 1) and forcing it back into it using thermal energy received from air heating elements 9 (Fig. 1). 4).

In the working area there are: holders 13 (Fig. 1) in the form of vertical racks (left and right vertical guides), which are designed to install shelves 14 (gastronorm containers) in an amount of, for example, 20 pieces, as well as a needle temperature probe (on Fig. not shown), made on a special bracket (not shown in Fig.) of the left guide and designed to control the temperature inside the product, there are also incandescent lamps 15 (Fig. 4) located on the left wall under the protective glass (for example, BJB 77.705. U103.23 - 25 W in an amount of 2 pcs. ) to illuminate the working chamber 3 (Fig. 1) and the "umbrella" 16 located on its upper wall 16 (Fig. 8), spraying water that has fallen onto it along the walls of the working chamber 3 (Fig. 1) during automatic washing: water using a pump 17 (Fig. 4) of the sink is automatically taken from the bath 18 (Fig. 3) of the sink and through the pipe 19 it falls on the “umbrella” 16 (Fig. 3, 8), from which it flows down the walls of the working chamber 3 (Fig. 1) getting into the bath 18 (Fig. 3) washing. From the surface of the inner glass 5 (FIG. 1), water flows into the tray (not shown in FIG.).

For automatic washing of the working chamber 3 (Fig. 1) in a steam-convection apparatus, the following are also made: a valve 20 (Fig. 2) of a ball with an electromechanical drive "Steam generator", a valve 21 (of Fig. 2,3) of a ball with an electromechanical drive "Bath" , pump (dispenser) 22 (Fig. 4) of washing and rinsing agents, temperature sensor 23 (Fig. 2) “Steam generator.” For manual washing of the working chamber 3 (Fig. 1), a shower device is made in the steam-convection apparatus (in Fig. 4) (not shown), fixed with a bracket (not shown in Fig.) on its right side wall ke (Fig. not shown). To remove grease and food residues from the bath 18 (Fig. 3) using the washing opening plug 24 (FIG. 2).

The electric equipment of the steam-convection convection apparatus is made on the mounting panel 25 (Fig. 2), which is located behind the right facing of the casing 2 (Fig. 1).

On the front surface of the housing 2, a touch control panel 26 is made, with which the operation of the steamer-convection apparatus is controlled. The liquid crystal screen (not shown in FIG.) Of the touch control displays information on the operating parameters of the steam-convection apparatus, the necessary parameters are inputted and outputted by means of the liquid crystal screen. Behind the control panel 26 (Fig. 1) there is an industrial controller (not shown in Fig.) That processes the LCD screen commands of the touch control panel 26 and transfers them to the relay board controller 45 (Fig. 2), while it receives data from the relay board and gives the command to output informational messages to the liquid crystal screen (temperature in the working chamber 3, probe temperature (not shown in FIG.), error signals, etc.). The controller 45 (Fig. 2) of the relay board processes the commands from the industrial controller (not shown in FIG.) And transmits commands to the heating elements 9 (Fig. 4), electromagnetic valves 27 (Fig. 3), electric drives (not shown in Fig.) etc. At the same time, the controller 45 (Fig. 2) of the relay board receives data from external objects (temperature sensors, the status of digital inputs, etc.) and after processing transmits them to an industrial controller (not shown in Fig.).

To supply the steam-convection convection apparatus with water and drain water from it, the following structural elements are made in the device: electromagnetic valve 27 (Fig. 3), manifold 31 (Fig. 3), steam generator 28 (Fig. 2), thermal switch 30 (Fig. 3 ), triggered when the water temperature reaches 160 ° C, the drainage collector 32, drain (not shown in Fig.) water into the sewer. To bring to the water supply and sewerage systems, hoses are used in the device (not shown in FIG.).

The steam generator 28 (Fig. 2) provides heating of the water with the help of "water" heating elements (not shown in Fig.) And steam supply to the working chamber 3 (Fig. 1) in predetermined modes. Water in the steam generator 28 (Fig. 2) comes from the water supply network, the water level in it is automatically maintained by the electromagnetic valve 27 (Fig. 3). The control of the liquid level in the steam generator 28 (Fig. 2) is performed by the internal compartment 33 (Fig. 2) with two electrodes installed (not shown in Fig.). The controller 45 (Fig. 2) of the relay board generates an electric signal to the corresponding electrodes and, based on the signals received from them, generates a command to turn the solenoid valve 27 (Fig. 3) on or off, fill the steam generator 28 (Fig. 2) and “water” TENOV (not shown in Fig.). To prevent an emergency in case of failure of the water level control system, a working cylinder (not shown) of a thermal switch connected to the case of thermal switch 30 (Fig. 3) using a capillary tube (not shown in Fig. 2) is installed in the steam generator 28 (Fig. 2) shown). The temperature switch 30 de-energizes the device when the steam temperature 28 (Fig. 2) reaches a water temperature equal to (plus) 160 ° C. When the water level in the inner compartment 33 is lower than set, the electromagnetic valve 27 (Fig. 3) opens and the steam generator 28 (Fig. 2) is filled with water; when the water rises in the inner compartment 33 to the upper level, the electromagnetic valve 27 (Fig. 3) closes and the water supply stops. The controller 45 (Fig. 2) of the relay board, analyzing the state of the contacts of the control circuits, generates an error signal and through an industrial controller (not shown in Fig.) Displays an information message on the screen of the control panel 26 (Fig. 1).

To cool the working chamber 3 with the door 4 closed without shutting off the electric motor 12 (Fig. 2), the cooling system was designed in the working chamber 3 (Fig. 1) (the cooling circuit is shown in Fig. 5), structurally based on the fact that the working chamber 3 (Fig. 1) forms a working cavity with communicating air inlet and outlet channels, i.e. it has an input channel 35 (Fig. 5) and an output channel 36. To start cooling the working chamber 3 (Fig. 1), the operator selects the corresponding "Cooling" mode on the control panel 26 and presses the "Start" button. The inlet channel 35 (Fig. 5) of the air inlet from the external environment is formed by a hole 38 (Fig. 5) made in the working chamber 3 (Fig. 5), into which the inlet pipe 37 (Fig. 5, 7) is inserted with one end, having -shaped profile with a size of 50.8x2 08X18H10 according to GOST 11068-81, while the inner diameter of the inlet pipe 37 is 46.8 mm, and its outer diameter is 50.8 mm. In the inlet pipe 37, a shutter 39 is made, for example, with a diameter of 49 mm, with an electric drive from a standard gear motor, for example, a 25GA model, which opens and closes the inlet channel 35 (Fig. 5) of the inlet pipe 37 (Fig. 5, 7) by rotation around a horizontal axis . For the location and rotation of the valve 39 in the inlet pipe, a diametrical groove (not shown in Fig.) With a diameter of 49 mm and a height of 30 mm is made in it. Damper 39 is made of rubber of a special composition FSI-55P according to TU 2539-001-49247031-2004 (fluorosilicon rubber), which has high frost resistance and high heat resistance: from (minus) 60 ° C to (plus) 200 ° C.

The damper 39, which works according to the established algorithm, structurally includes a gear motor 40 (Fig. 7) of the 25GA model, a shaft 41 with a cam 42 made on it (for example, made of polyamide PA6-210 KS) and the damper 39 itself (Fig. 5, 7 ), there is also a microswitch 43 (Fig. 7), for example, the PM-39 model with button 44, which can be in the “pressed” / “depressed” positions. At a temperature in the working chamber 3 (Fig. 1) (plus) 160 ° C and the position of the shutter 39 (Figs. 5, 7) “normally closed” (the air inlet channel 35 (Fig. 5) of the inlet pipe 37 (Fig. 5 is blocked) , 7)) and the need for cooling the working chamber 3 (Fig. 1) to a temperature (plus) 130 ° from the microswitch 43 (Fig. 7), a signal is sent to the controller 45 (Fig. 2) of the relay board about the position of the button 44 (Fig. .7) microswitch 43. When the button 44 is “depressed” (the cam 42 located on the shaft 41 does not act on the button 44 of the microswitch 43) and the controller 45 (Fig. 2) of the relay board You give a signal to the gear motor 40 (Fig. 7) to start work. The shaft (not shown in FIG.) Of the gear motor 40 (FIG. 7), rotating, transmits rotation to the shaft 41 with a cam 42 and a shutter 39 (FIG. 5, 7). The shaft 41 (Fig. 7), rotating, acts with the cam 42 on the button 44 of the microswitch 43, translating it into the "pressed" position. Thus, the micro switch 43 gives a signal to the controller 45 (Fig. 2) of the relay board to continue the operation of the gear motor 40 (Fig. 7). The signal for the operation of the gearmotor 40 will continue until the cam 42 acts on the button 44 of the microswitch 43. After the cessation of the cam 42 on the button 44, it goes into the "depressed" position. The signal from the micro switch 43 to the controller 45 (Fig. 2) of the relay board is stopped and it gives a signal to the gear motor 40 (Fig. 7) to stop the operation. The damper 39 (Fig. 5, 7), located on the shaft 41 (Fig. 7) with the cam 42, is transferred in this case from the "normally closed" position to the "normally open" position, while the air inlet channel 35 (Fig. 5 ) inlet pipe 37 (Fig. 5, 7) is open, because the shutter 39 (Fig. 5, 7) is located vertically. Also, the damper 39 with forced intake of ambient air can also be used to abruptly remove moisture from the working chamber 3 (Fig. 1), thereby you can get a golden crust on the products.

The output channel 36 (Fig. 5) of the outlet into the external environment of the heated air is formed by a second hole 46 (Fig. 5) made in the lower part of the working chamber 3 (Fig. 1), into which the outlet pipe 47 of the manifold 31 is inserted at one end. The outlet pipe 47 collector 31 is located coaxially with it. The upper ends (not shown in FIG.) Of the inlet pipe 37 (Fig. 5, 7) and the outlet pipe 47 (Fig. 3, 5) are located outside the upper (outer) surface 48 (Fig. 2) of the steam-convection apparatus.

To suck in the external ambient air (forcing it to be forcedly taken) into the working chamber 3 (Fig. 1) through the inlet pipe 37 (Fig. 5, 7) to the revolving working surfaces 49 (Fig. 6) of the impeller 50 (Fig. 4) of the electric motor 12 (Fig. 2) welded by resistance welding (according to GOST 15878-79Kt3) additional blades 51 (Fig. 6) with a special L-shaped profile made of AISI 304 stainless steel 1 mm thick. In FIG. 6 shows the welding line of the additional blade 51 to the reverse working surface 49 of the impeller 50 of the electric motor 12.

After the automatic opening of the shutter 39 (Fig. 5), i.e. its vertical position, when reaching a temperature in the working chamber 3, for example, equal to 160 ° C, by rotating additional blades 51 (Fig. 6) of the impeller 50 (Fig. 4) of the electric motor 12 (Fig. 2), a forced vacuum is created in the inlet pipe 37 (Fig. 5, 7), which creates a thrust that continuously injects into the working chamber 3 (Fig. 1) the external ambient (incoming) air, which then passes through the partition 7 (Fig. 1) and enters the working chamber 3 and mixes throughout volume with hot air there. Additional blades 51 (FIG. 6) located on the impeller 50 receive rotation from the electric motor 12 (FIG. 2), which receives a rotation signal from the controller 45 (FIG. 2) of the relay board after receiving the signal from the industrial controller (in FIG. not shown) to enable the "Cooling" mode.

With the open damper 39 (Fig. 5) due to the continuous injection of external (ambient) incoming air into the working chamber 3 (Fig. 1), excessive pressure is created in it, which pushes into the external environment through the outlet pipe 47 (Fig. 5) of the collector 31 (Fig. 3) excessive air heated in the working chamber 3 (Fig. 1). The output channel 36 (Fig. 5) is made in a constantly open state. The cooling of the air in the working chamber 3 (Fig. 1) is due to the mixing of the outside air received into it through the inlet channel 35 (Fig. 5) with the hot air present in it and the subsequent discharge from the working chamber 3 (Fig. 1) outward through the outlet channel 36 (Fig. 5) heated in the process of diffusion of air, which prevents the creation of excessive pressure in the working chamber 3 (Fig. 1). The inlet pipe 37 (Fig. 5, 7) and the outlet pipe (Fig. 5) are arranged according to the drawing in FIG. 5.

In the working chamber 3 (Fig. 1) above the impeller 50 (Fig. 4) of the electric motor 12 (Fig. 2) there is a nozzle (cooling water) 29 (Fig. 4, 5) controlled by a standard electromagnetic valve 27 (Fig. 3), for example, 2W x 180 type ED 90/88, by means of which cold water is injected into the working chamber 3 (Fig. 1) in order to accelerate cooling. The material of all elements of the nozzle 29 (Fig. 4, 5) is AISI304 stainless steel. The nozzle 29 begins to work when the temperature in the working chamber 3 (Fig. 1) is higher than the one set by the operator, for example, (plus) 130 ° C, while cold water from the nozzle 29 (Fig. 4, 5) gets onto the impeller 50 (Fig. 4) an electric motor 12 (Fig. 2), is sprayed on the walls of the working chamber 3 (Fig. 1), providing a significant reduction in temperature in it. Structurally, the nozzle 29 (FIG. 4, 5) consists of an injector (not shown in FIG.), A standard nut (not shown in FIG.) And a fitting with a welded tube (not shown in FIG.). Water entering the working chamber from the nozzle 29 (Fig. 4, 5) is discharged through the outlet of the working chamber 46 (Fig. 5) and enters the sink 18 (Fig. 3), from there after opening the ball valve 21 (Fig. . 2), drains through the drainage collector 32 into the sewer.

The cooling of the working chamber 3 without opening the door 4 is used with a working steam-convection apparatus, for example, between the stages of preparing various dishes; between the stages of cooking the same dish; during cooking. The temperature in the working chamber 3 of the steam-convection convection apparatus is automatically maintained by means of a temperature controller (not shown in Fig.) With a temperature control range from (plus) 50 ° C to (plus) 270 ° C.

In other modes of operation of the steam-convection apparatus, continuous ventilation of the working chamber 3 (Fig. 1) is carried out only through the drainage manifold 32 (Fig. 2), thereby preventing the creation of excessive pressure in the working chamber 3 (Fig. 1).

Heated air passing through the working chamber 3, enters the outlet pipe 47 of the manifold 31 (Fig. 3). In the collector 31, the heated air condenses and simultaneously heats the water supplied to the steam generator 28 (Fig. 2) due to the heat sink 53 located on the collector (Fig. 3, 5). Condensate from the collector 31 (Fig. 3) through a hose (not shown in Fig.) Enters the drainage manifold 32 (Fig. 2), where it is cooled, and the resulting water is drained into the sewer through a special drain (not shown in Fig.) . The temperature of the condensate drained from the collector 31 (Fig. 3) is monitored by a temperature sensor (not shown in Fig.). According to the signal received from the temperature sensor of the drainage manifold 32 (Fig. 2), the relay board controller 45 generates a command for the solenoid valve 27 (Fig. 3), connected to the drainage collector 32, to supply cold water from the water supply network to cool the temperature drained condensate.

The washing of the steam-convection convection apparatus is carried out using the control panel 26 (Fig. 1) of the control unit. Hot water from the steam generator 28 (Fig. 2) through the ball valve 20 (Fig. 4) enters the sink 18 (Fig. 3), then the water is supplied through the washing pump 17 (Fig. 4) to the working chamber 3 (Fig. 2). one). Using pumps (dispensers) 22 (Fig. 4), dosing of detergent and rinse aid is carried out. Using a tap 21 (Fig. 2) of the ball from the working chamber 3 (Fig. 1), the spent solution, having passed the drainage collector 32 (Fig. 2), is discharged into the sewer. To reduce the temperature effect on sensitive electronic devices located inside the casing 2 (Fig. 1) of a steam-convection apparatus, a fan 52 (Fig. 3) is installed on its rear wall (Fig. 1), which expels warm air out through the casing (not shown in FIG.).

The claimed device operates as follows. After closing the door 4 (Fig. 1) of the working chamber 3 (Fig. 1), a tap (not shown) of the water supply is installed in the "Open" position. Then set the differential switch (not shown in FIG.) In the control cabinet (not shown in FIG.) To the “On” position. On the control panel 26 (Fig. 1), press the On / Off button and release and after downloading the software, the main menu is displayed on the screen of the control panel 26 and the illumination of the working chamber 3 is turned on. The cooking mode is selected. If necessary, the operator of the steam-convection convection device can adjust the parameters of its operating mode by pressing and releasing the "Start" button (not shown in Fig.). When the mode starts, if the water temperature in the steam generator 28 (Fig. 2) and / or the temperature in the working chamber 3 (Fig. 1) is lower than the set value, the message “Preparing the steam generator”, “Preparing the camera” is displayed on the screen of the control panel 26. The preparation mode is exited by pressing and releasing the “Cancel” button (not shown in Fig.). After reaching the set temperature value, the message “Download the product” will be displayed on the screen of the control panel 26 (Fig. 1). If the product is already loaded, then you must click the "Next" button (not shown in Fig.). Then you need to open the door 4 (Fig. 1) and load the product into the working chamber 3. When using the "Probe" parameter, it is necessary to insert the probe (not shown in Fig.) Into the product. After the work is completed, the steam-convection apparatus is turned off by pressing and releasing the On / Off button (not shown in FIG.). Next, the steam-convection apparatus is de-energized by setting the differential switch in the stationary wiring to the “Off” position (not shown in Fig.), Open door 4 (Fig. 1) and turn off the water supply taps.

The algorithm of the steam-convection apparatus allows you to choose one of the following nine modes of operation:

“Convection” mode: heating of the working chamber occurs due to the operation of “air” heating elements without supplying steam to the working chamber; range of a task of temperature in a working chamber (plus) (30-270) ° C; humidity is not regulated;

“Convection with steam” mode: heating of the working chamber occurs due to the alternate operation of “air” heating elements and “water” heating elements; temperature setting range in the working chamber (plus) (30-250) ° C in increments of 1 ° C; humidity in the working chamber is set from 0% to 100% in increments of 10;

“Steam” mode: heating of the working chamber occurs due to the operation of “water” heating elements; temperature range in the working chamber (plus) (30-100) ° C in increments of 1 ° C; humidity is not regulated and is 100%;

“Cold steam” mode: heating of the working chamber occurs due to the operation of “water” heating elements; temperature setting range in the working chamber (plus) (30-98) ° C in increments of 1 ° C; humidity is not regulated and is 100%;

“Warm-up” mode: heating of the working chamber occurs due to the alternate operation of “air” heating elements and “water” heating elements; temperature setting range in the working chamber (plus) (30-250) ° C in increments of 1 ° C; humidity in the working chamber 3 is set from 0% to 100% in increments of 10;

“Proofing” mode: heating of the working chamber occurs due to the operation of “water” heating elements; temperature setting range in the working chamber (plus) (30-60) ° C in increments of 1 ° C; humidity in the working chamber is not adjustable and is 100%;

“Regeneration” mode: heating of the working chamber occurs due to the operation of “water” heating elements, the temperature setting range in the working chamber (plus) is (30-120) ° C in increments of 1 ° C, the humidity in the working chamber is not adjustable and is 100%;

“Cooling” mode: cooling the working chamber with the door closed to the preset temperature value by the user; range of a task of temperature in a working chamber (plus) (50-250) ° C;

“Multi-level cooking” mode: heating of the working chamber 3 occurs in the “Convection” or “Convection with steam” mode, depending on the mode selected by the user; for all levels, the parameters “Chamber temperature”, “Fan rotation speed” and “Humidity” are simultaneously set (only for the modes with the “Steam” and “Convection with steam” functions).

Changing the operating modes of the steam-convection apparatus and cooking parameters is carried out by the operator by pressing the corresponding button on the control panel 26.

In contrast to the prototype, which is characterized by low functionality due to the lack of effective cooling of the working chamber at various stages of cooking without opening the door, the proposed technical solution allows cooling the working chamber between the stages of cooking different dishes, between the stages of cooking the same dish, as well as during cooking without opening the door of the working chamber with the motor running, which is achieved due to the design of the cooling system her chamber, which is formed by interconnecting channels of the working chamber - the channel for entering air from the external medium into the working cavity of the working chamber and the channel for the exit of heated air into the external medium, with an open damper, the air from the external environment is drawn through the inlet channel into the working medium of the working chamber due to rotation additional blades located on the working surfaces of the impeller of the electric motor, i.e. the forced rarefaction created in the inlet pipe of the inlet channel allows the air to be drawn into the working chamber from the external environment, the air coming from the external environment in the working chamber is diffusively mixed with hot air and, due to the excess pressure created (due to the continuous injection of air from the external environment), is pushed into the external environment through the outlet channel of the outlet pipe of the collector, cooling the working cavity of the working chamber. The execution of the nozzle in the working chamber allows the injection of cold water into the working chamber and accelerate its cooling.

The proposed technical solution has a constructive unity and implements a general functional purpose (functional unity). All components of the claimed technical solution are interconnected by assembly operations, i.e. are in functional constructive unity.

The implementation of the proposed utility model allows to solve the claimed technical problem and ensure the achievement of the claimed technical result.

In the prior art, no analogue was found, characterized by features identical to all the essential features of the claimed utility model.

The proposed device with cooling the working chamber confirms the purpose, feasibility and availability, in connection with which the claimed utility model meets the patentability condition "industrial applicability".

Claims (3)

1. A steam-convection apparatus comprising a housing installed on the base and a heat-insulated working chamber with a door and shelf holders located in the working chamber, a fan and heating elements, as well as a steam generator, water supply and drainage system, a control unit with a touch control panel, inserted into the opening of the working chamber, the outlet pipe of the collector, located coaxially with it, forming a channel for the exit of heated air into the external environment, characterized in that the working chamber there is a working cavity with communicating air inlet and outlet channels, where the air inlet channel from the external environment is formed by means of an inlet pipe inserted into an opening made in the working chamber, the inlet pipe is made with a shutter, additional blades are made on the working surfaces of the electric impeller, in the working the chamber has a nozzle cooling the working chamber by injection of cold water. 2. Steam-convection apparatus according to claim 1, characterized in that the inlet pipe is made with a L-shaped profile. 3. Steam-convection apparatus according to claim 1, characterized in that the damper is made rotating.

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