SU1211315A1 - Device for local heating of surfaces - Google Patents

Description

2. The device according to p., About tl and - the fact that, in order to increase the intensity of heating, it is equipped with additional blades installed in the opening of the conical part of the housing.

The invention relates to heaters and can be used in various areas of the national economy in cases where local heating of the surface is necessary.

The purpose of the invention is to increase the efficiency of the device.

 Figure 1 shows schematically a device for local heating of surfaces, a section along its longitudinal axis; in figure 2. - section aa in figure 1.

The device for local heating of surfaces comprises a housing 1 and co-axially located heater 2 and air flow guides 3 located therein. The housing 1 is made in the form of a cylinder, which passes into a truncated cone j with a small base facing the hole 4. In the cylindrical part of the housing 1 there is a holder 5 on which the heater 2 and the air flow guides 3, made in the form of blades, are fixed. The housing 1 is connected via a gear 6 with a drive 7 of rotating the housing around the holder 5. Blades 8 are installed in the opening A in the conical part of the housing 1. The housing I is protected from the surrounding atmosphere by a housing 9 with a device 10 for adjusting the distance between the housing 1 and the heated surface 11 of the product . To improve the operation of the device in the cylindrical part, at the junction of the cylindrical part of the body into the conical, an annular edge 12 is fixed. The holder 5 is attached to the casing 9, and the body 1 is connected to the holder 5 through the connection.

The device works as follows.

3. The device according to claim 1, wherein it is designed to ensure the safety of the operation of the device, it is provided with a housing covering the housing with a device for adjusting the distance between the product and the housing.

A device for local heating of surfaces is installed on a heated surface I. By fitting .10 with the help of locking screws

adjust the distance to the surface, turn on the heater 2 and the drive 7. In the process of rotation of the housing 1 due to centrifugal forces, air is sucked up along its conical

surface to the central part of the regulator enclosed by the annular edge 12. Then, the air passes through the guides 3 in the form of blades passes to the heater 2, is heated also by

The vacuum goes to the heated surface II, where it gives off heat and again rises to the central part of the housing 1. Thus, the air is circulated inside the proposed device with minimal heat loss. The blades 8 lead to an increase in the speed of air movement and thereby increase several times the heat transfer coefficient. Casing 9

in addition to its main role - fencing rotating parts, also protects from excessive heat loss, creating an intermediate zone of warm air between the rotating body

and body casing.

With a conventional non-rotating heater, at least 30% of the heat escapes into space as a result of free convection, in this case these losses

reduced by half. In order to ensure equal heat transfer of two heaters - fixed and rotating, with blades, in the first case the air temperature

should be as many times as the heat transfer coefficient is less. In addition, as the temperature rises, the operating conditions of the heater may deteriorate, resulting in heat transfer to space.

The application of the proposed device allows to reduce heat loss by no less than two times due to the closed circuit of hot air and to increase the heat transfer coefficient by 3-4 times between the air and the heated surface.

Editor L.Povkhan

Compiled by N.Kuzovkina

Tehred S. Migunova Proofreader V. Sinitska

612/32 Circulation 552Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch PPP Patent, Uzhgorod, st. Project, 4

FIG. 2

Claims (3)

1. DEVICE FOR LOCAL SURFACE HEATING, · comprising a housing with an opening made in the form of a cylinder turning into a truncated cone, facing the opening with a small base and located coaxially in the heater and air flow guides, characterized in that, in order to increase the efficiency of the device, it is equipped with a holder located in the cylindrical part of the housing, on which the heater and air flow guides · are fixed, and a housing rotation drive around the holder, in this case. air flow guides are made in the form of blades. 2. The device according to claim 1, characterized in that, in order to increase the intensity of heating, it is equipped with additional blades installed in the hole of the conical part of the housing. 3. The device according to claim 1, characterized in that, in order to ensure the safety of the device, it is provided with a housing covering the housing with a device for adjusting the distance between the product and the housing. f