RU2158809C1 - Rain-water goods with electric heating - Google Patents

Abstract

FIELD: construction, in particular, engineering equipment of buildings - water drains equipped with deicing devices. SUBSTANCE: a layer of insulating material is applied onto the drain funnel and drain pipe, and the electric heating elements are positioned directly on the outer surface of the drain funnel and drain pipe under the layer of heat- insulating material. Besides, the drain pipe has at least one air valve closing the drain pipe cross-section. EFFECT: reduced consumption of electric power. 1 dwg

Description

 The invention relates to the construction, in particular, to gutters and the removal of ice and snow from the roofs of buildings.

 As you know, the drawback of gutter systems of roofs of buildings is that they practically do not fulfill their functions in the autumn - winter - spring period, when the air temperature during the day varies from plus to minus values. As a result of the formation of ice plugs in the drainpipes, water accumulating in the mouths of the water strips drains from the edges of the roof roofs, bypassing the drain funnels and drainpipes filled with ice. The resulting icing and icicles pose a great danger to pedestrians, and the gutters quickly fail.

 Traditionally, the fight against the icing of gutters and the formation of icicles on the edges of the roofs is carried out by mechanically cleaving ice and removing snow from the roofs. Carrying out these works is unsafe, associated with high costs, and also leads to damage to roofs and drains.

 The closest analogue of the claimed invention is a cable system "TEPLOSCAT" with electric heating of the roof, drain funnels and drainpipes (NN Khrenkov. Cable heating systems and their use in construction. Building materials. N 11, 1995, p. 15 -17).

 The cable system "TEPLOSCAT" is arranged as follows. A special heating cable with a high linear ohmic resistance is laid "snake" along the edge of the roof to a width of 0.6 - 1 m and directly inside the drain funnel and drainpipe. The cable is connected to an AC mains supply of 220 V 50 Hz through an energy distribution device. When the cable is heated, the edge of the roof, the drain funnel and the drain pipe are heated. As a result, snow melts, and meltwater flows down the heated drainpipes. The electrical power consumed by the mains depends on the perimeter and height of the building.

 The disadvantage of the TEPLOSKAT cable system is the high level of energy consumption. In this case, a significant share is occupied by heat losses through the walls of the drainpipe and losses due to the factor of the natural “draft” of heated air in the heated drainpipe. In addition, the need to use a special cable determines the high cost of this system.

 The aim of the invention is to increase the efficiency and reduce energy consumption of the gutter system with electric heating. This goal is achieved by the fact that the drain funnel and the drain pipe are coated externally with a layer of heat-insulating material, and the electric heating elements are placed under a layer of heat-insulating material on the outer surface of the drain funnel and drain pipe, forming a common channel, inside of which at least one air valve is located . Moreover, additional heating of the roof edge is limited to the area directly adjacent to the drain funnel.

The drawing shows a sectional view of a General view of the drainage system with electric heating with the following digital designations of structural elements:
1 - drain funnel;
2 - a drainpipe;
3 - device for electrical power and automation;
4 - air valve;
5 - electric heating element;
6 - power cable heating elements;
7 - heat insulating material;
8 - a protective shell of a heat insulating material;
9 - wall of the building;
10 - mounting device for a drainpipe;
11 - roof lathing;
12 - roof;
13 - water striker;
14 - electric roof heater;
15 - lattice drain funnel.

 The drawing shows a drainage system with electric heating in the working position in conjunction with the roof and wall of the building.

 An electrically heated drainage system consists of a drain funnel 1, a drainpipe 2, composed of several sections connected together, and an electric power supply and automation device 3. An air valve 4 is placed inside the drainpipe 2. Directly on the outer surface of the drain funnel 1 and the drain pipes 2 are placed electric heating elements 5, connected by a power cable 6 with an electric power device 3. A drain funnel 1 and a drain pipe 2 together with heating elements 5 PTFE coating layer of heat insulating material 7, which is enclosed in a protective sheath 8 protecting it from mechanical damage. The drainpipe 2 is attached to the wall 9 of the building using the mounting device 10 in an upright position so that the drain funnel 1 is mated to a roof consisting of a crate 11 and a roof 12 having a water outlet 13 and an electric heater 14 located on the underside of the roof 12. Drain funnel 1 is closed on top of the grid 15.

 The proposed gutter system with electric heating is as follows. The electric power device 3, using the automatic control system, as necessary, turns on the power supply voltage of the electric heating elements and maintains, in the region of positive values, the temperature of the drain funnel 1, drain pipe 2 and the roof section 12 directly adjacent to the drain funnel 1. As a result, snow is on the edge of the roof 12 melts, and the resulting water flows through the drain funnel 1 and the drain pipe 2. The air valve 4 does not prevent the water from draining. The grate 15 prevents clogging by foreign objects of the drain funnel 1 and the drain pipe 2.

 A significant reduction in energy consumption and increased efficiency is achieved as a result of the fact that due to the layer of heat-insulating material 7, heat dissipation into the surrounding space is sharply reduced, and the energy of electric heating elements 5, located directly on the outer surface of the drain funnel 1 and drain pipe 2, is spent mainly on heating the walls drain funnel 1 and drainpipe 2. At the same time, the reliability of the electric heating system is significantly increased due to then the electric heating elements 5 are located outside the zone of possible ice formation. The cross section of the drainpipe 2 can be of any shape, including a circle, square or rectangle.

 The air valve 4 prevents the free flow of heated air from the drainpipe 2 and thereby reduces the heat loss due to the natural “draft” factor. However, the valve 4 does not prevent the flow of melt water inside the drain pipe 2. The drawing shows one air valve. Depending on the length of the drainpipe 2 there may be several air valves installed at different levels.

 For heating the elements of the drainage system, various types of electric heating elements can be used. The most efficient use of flat rigid and flexible heating elements, characterized by a large heat transfer surface, while the temperature of the heating element is almost equal to the temperature of the heated area and is automatically maintained at a given level.

 The high efficiency of the proposed drainage system with electric heating allows you to limit additional heating of the edge of the roof 12 to a small area directly adjacent to the drain funnel 1.

 The practical implementation of the gutter system with electric heating is not in doubt, as it is based on the use of well-known technical solutions.

Claims (1)

 An electrically heated gutter system designed to drain water from the roof of a building and containing a drain funnel, a drain pipe, electric heating elements and a power supply system for heating elements, characterized in that the drain funnel and drain pipe are coated with a layer of insulating material on the outside, and electric heating elements placed under a layer of insulating material on the outer surface of the drain funnel and drain pipe, forming a single channel, inside of which located on at least one air valve.