RU2742240C2 - Bakery oven with convective heating - Google Patents

Abstract

FIELD: food industry.

SUBSTANCE: baking oven with convective heating, including housing, ventilation chamber with furnace device and one or more fans, fixed on rear wall of housing and separated by horizontal partitions, vertical partition separated from working chamber, in which there is a device with heated articles. At that, in lower part of ventilation chamber there is a cylinder of furnace device, connected to burner device, along lateral sides of fans there are chimney channels connected in lower part to furnace device, and in upper part connected to smoke removal channels, note here that to connect ventilation chamber with working chamber there are channels accommodating movable shutters while holes in upper and lower lateral parts of vertical partition are provided.

EFFECT: invention simplifies and improves mixing of heated air in lower zone with less heated air in upper zone of oven ventilation chamber and enable production of a combined oven operating on gas or liquid fuel and electric energy.

3 cl, 4 dwg

Description

The invention relates to the baking industry and relates to the design of small baking ovens with rotating and non-rotating devices for stacking products, which are intended for use in baking and other industries related to heating products.

Known baking oven with convective heating, which relates to the design of small baking ovens with rotating and non-rotating devices for stacking products (patent for invention RU 2187934, publ. 27.08.2002 bull. No. 24). The furnace contains a body, ventilation and working chambers. A combustion device is installed in the lower part of the ventilation chamber, chimney ducts are located on the sides in the ventilation chamber, connected in the lower part with the combustion device, in the upper part with a chimney. Between the chimney side channels and channels connecting the ventilation chamber with the working chamber, channels are installed for directing and moving more heated air from the lower zone to the upper zone, and less heated air from the upper zone to the lower zone and thus regulating the temperature of hot air according to the entire height of the oven. However, in a similar furnace, the design of channels for mixing more or less heated air and distributing it over the entire height of the furnace is somewhat complicated. The design also does not allow the installation of heating elements for the operation of the furnace on gas or on liquid fuel and electricity.

The technical object of the present invention is to create conditions for simplifying and improving the flows of more and less heated air and to enable the furnace to operate both on gas, or on liquid fuel, or on electricity.

This problem is solved due to the fact that a baking oven with convection heating includes a body, a ventilation chamber with a combustion device and one or more fans fixed on the rear wall of the body and separated from each other by horizontal partitions, separated by a vertical partition from the working chamber in which the device is placed with heated products, characterized in that in the lower part of the ventilation chamber there is a cylinder of the combustion device connected to the burner device, on the lateral sides of the fans there are chimney ducts connected in the lower part to the combustion device, and in the upper part connected to the smoke exhaust ducts, while to connect the ventilation chamber with the working chamber, there are channels in which movable flaps are located, and there are holes in the upper and lower side parts of the vertical partition. It is possible to install heating elements in the channels connecting the ventilation and working chambers. Dampers are installed on the holes of the vertical partition separating the working and ventilation chambers.

The technical result consists in simplifying and improving the mixing of more heated air in the lower zone with less heated air in the upper zone of the ventilation chamber of the furnace and making it possible to manufacture a combined furnace operating on gas or liquid fuel and electricity, which is achieved by changing the design of the combustion device.

The furnace contains a body, ventilation and working chambers. In the lower part of the ventilation chamber there is a combustion device cylinder, on the sides of the fans in the ventilation chamber there are chimney ducts connected in the lower part with the combustion device cylinder, in the upper part - with smoke exhaust ducts. In the space between the chimney ducts and the sides of the ventilation chamber, the more heated air in the lower zone is mixed with the less heated air in the upper zone of the ventilation chamber and directed into the working chamber through an opening in the upper side of the vertical partition separating the ventilation and working chambers and the channel connecting a ventilation chamber with a working chamber on one side, and also on the other side of the ventilation chamber, the less heated air in the upper zone is mixed with the more heated air in the lower zone of the ventilation chamber, and it is directed into the working chamber through an opening in the lower side of the vertical partition and a channel connecting ventilation chamber with a working chamber.

The new design of the combustion device (heat exchanger) and the vertical partition makes it possible to simplify the design and improve the mixing of the heated air coming from the ventilation chamber to the working chamber through the openings on the partition separating the ventilation and working chambers and channels connecting the ventilation to the working chamber and simplifies the regulation of air flow distribution along the entire height of the oven.

The new design of the combustion device and the vertical partition also makes it possible to install heating elements (not conventionally shown in the drawings) in the ducts connecting the ventilation and the working chamber, which will enable the furnace to operate on electricity. The design also makes it possible to install dampers in the channels connecting the ventilation chamber with the working chamber and on the central holes for fans on the vertical partition separating the working chamber from the ventilation chamber (not conventionally shown in the drawings) to separate the ventilation chamber from the working chamber when the oven doors are open during the loading phase and unloading products, in order to save the heat energy of the furnace.

The essence of the invention is illustrated by drawings, where FIG. 1 schematically shows a furnace in a vertical (frontal) section (A-A), FIG. 2 - the same in a horizontal section (B-B), Fig. 3 - in a vertical (profile) section (B-B), Fig. 4 - in a vertical section (G-G).

The oven consists of a housing 1, a ventilation chamber 2 with one or more fans 3, fixed on the rear wall 4 of the housing 1 and separated by horizontal partitions 5, a vertical partition 6, a ventilation chamber 2 separated from the working baking chamber 7, in which there are devices with heated products, for example, a trolley (not shown in the drawing). A combustion cylinder 8 is installed in the lower part of the ventilation chamber 2, it is connected to the burner device 11. On the sides of the fans 3, there are chimney ducts 9 connected in the lower part to the combustion cylinder 8, and in the upper part connected by a channel for removing smoke 12. In the space between chimney channels 9 and the sides of the ventilation chamber 2 housing, mixing on the left side of the ventilation chamber 2 of the more heated air of the lower zone with less heated air from the upper zone of the ventilation chamber 2, and its direction into the working chamber 7 through the hole 16 in the upper left side of the vertical partition 6 and duct 10 connecting the ventilation chamber 2 with the working chamber, and on the right side of the ventilation chamber 2 mixing the less heated air of the upper zone with the higher heated air of the lower zone of the ventilation chamber 2 and directing it into the working chamber 7 through the opening 17 in the lower right side part vertical baffle 6 and kana l 10, connecting the ventilation chamber 2 with the working chamber 7, and the regulation of the uniformity of baking along the height of the oven is provided by changing the position of the dampers 15 and changing the outlet section 14 of the channel 10, the burner device can be installed in any place convenient for use with the burner behind the oven, on the left or the right outer side of the oven.

The oven works as follows. Products placed on a rotating or non-rotating device, for example, a trolley, are placed in a pre-heated working baking chamber 7. The fans 3 are turned on, and air is sucked in from the working baking chamber 7 through the central holes 13 in the partition 6 and is thrown in radial directions, when this blows the outer surface of the cylinder of the combustion device 8 and the chimney ducts 9 heated by the flue gases passing inside them. The heated mixed air from the ventilation chamber 2, through the holes 16 and 17 of the partition 6 and the channel 10, enters the working chamber 7 and gives off heat to the baked products. The uniformity of heating the space of the working chamber is ensured by changing the position of the dampers 15 and changing the outlet section 14 of the channel 10.

Compared to the analogue oven and other convection-heated ovens, the convection-heated oven declared for patent allows:

1. Simplify the design and improve mixing of the heated air coming from the ventilation chamber 2 into the working chamber through the holes 16 and 17 of the partition 6 and channel 10 connecting the ventilation chamber with the working chamber, and will simplify the regulation of the distribution of air flows over the entire height of the furnace;

2. In channel 10, which connects the ventilation and working chamber, heating elements can be installed if necessary, which makes it possible to operate the furnace on gas or liquid fuel and on electricity;

3. The design also provides the ability to install dampers in the ducts connecting the ventilation chamber with the working chamber and on the holes on the vertical partition to separate the ventilation chamber from the working chamber when the oven doors are open in the phase of loading and unloading products in order to save heat energy of the oven.

Thus, the presence in the claimed furnace of a new set of essential features provides it with "novelty", "inventive step" and patentability.

Claims (3)

1. A baking oven with convection heating, including a housing, a ventilation chamber with a combustion device and one or more fans fixed on the rear wall of the housing and separated by horizontal partitions, separated by a vertical partition from the working chamber in which a device with heated products is placed, which differs the fact that in the lower part of the ventilation chamber there is a cylinder of the combustion device connected to the burner device, on the lateral sides of the fans there are chimney ducts connected in the lower part with the combustion device, and in the upper part connected to the smoke exhaust ducts, while connecting the ventilation chamber with the working chamber there are channels in which movable dampers are located, and there are holes in the upper and lower lateral parts of the vertical partition. 2. The furnace according to claim 1, characterized in that it is possible to install heating elements in the ducts connecting the ventilation and working chambers. 3. The furnace according to claim 1, characterized in that dampers are installed on the holes of the vertical partition separating the working and ventilation chambers.

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