ES2203308A1

ES2203308A1 - Hot air drier with inlet filter ring and heating body also air displacement unit

Info

Publication number: ES2203308A1
Application number: ES200102848A
Authority: ES
Inventors: Wolfgang Hentzschel
Original assignee: Electrostar Schottle & Co GmbH; Electrostar Schottle GmbH and Co KG
Current assignee: Electrostar Schottle & Co GmbH; Electrostar Schottle GmbH and Co KG
Priority date: 2000-12-20
Filing date: 2001-12-20
Publication date: 2004-04-01
Anticipated expiration: 2021-12-20
Also published as: ITMI20012720A1; CN1359654A; DE10152995A1; DE20021508U1; ES2203308B2; CN1177561C

Abstract

The hot air drier is designed so that in a housing (1) at a distance from its side walls (2), a tubular heating body (5) or at least two mutually opposite lying heating elements are provided. Which approximately extend from the air inlet (3) up to the outlet (4) in a longitudinal direction. So that the heating body (5) or the heating elements can be subjected to a circulating flow through its distance to the housing walls (2). The tubular heating body (5) has a square cross section. A centrally arranged air displacement unit (6) with low flow resistance is arranged in the heating body (5) or between the opposite lying heating elements.

Description

Secador de aire caliente.Hot air dryer.

Para mejorar el rendimiento de los secadores de aire caliente conocidos y al mismo tiempo alcanzar un menor consumo energético, se han previsto, según la invención, en una carcasa y a una distancia de sus paredes laterales un cuerpo calefactor tubular o, como mínimo, dos elementos calefactores de situación opuesta que se extienden aproximadamente desde la entrada del aire hasta la salida del aire en dirección longitudinal. De esta forma resultan de momento, por un lado, dos canales de corrientes es decir entre los elementos calefactores o bien dentro del cuerpo calefactor un canal de corriente primaria y entre los elementos calefactores o el cuerpo calefactor y las paredes laterales de la carcasa un canal de corriente secundaria. Una corriente parcial de aire pasa a través del canal de corriente primaria y otra corriente parcial a través del canal de corriente secundaria. Así se pueden evitar pérdidas de corriente por los hilos de calentamiento, rejillas y análogos, y se consigue una corriente de aire en gran medida con poca resistencia. Además, resulta una recirculación múltiple debido a lo cual aumenta la transmisión térmica y por lo tanto la rentabilidad debido al ahorro energético. Además, con la recirculación múltiple se alcanza una buena mezcla y se evitan corrientes parciales frías. El cuerpo calefactor tubular puede tener una sección transversal redonda y también rectangular, siendo la forma de cilindro hueco la más ventajosa. Si, por el contrario se utilizan dos elementos calefactores, es conveniente una estructura en forma de placas.To improve the performance of hot air dryers known and at the same time achieve lower energy consumption, they are provided, according to the invention, in a housing and a distance from its side walls a tubular heating body or, at least two heating elements of the opposite situation that are extend approximately from the air inlet to the outlet of air in the longitudinal direction. In this way they result from moment, on the one hand, two channels of currents ie between heating elements or within the heating body a channel of primary current and between the heating elements or the heating body and the side walls of the housing a channel of secondary current A partial stream of air passes through of the primary current channel and other partial current through of the secondary current channel. This can prevent losses of current through the heating wires, grids and the like, and it it achieves a large current of air with little resistance. In addition, it results in multiple recirculation due to which it increases thermal transmission and therefore profitability due to energy saving In addition, multiple recirculation is achieved. a good mixture and cold partial currents are avoided. The body tubular heater can have a round cross section and also rectangular, the hollow cylinder shape being the most advantageous Yes, on the contrary two elements are used heaters, a plate-shaped structure is convenient.

Con el fin de diseñar geométricamente de forma similar las secciones transversales hidráulicas del canal de corriente exterior y del interior, según otra característica de la invención se ha previsto en el cuerpo calefactor tubular o entre los elementos calefactores opuestos un dispositivo de desplazamiento de aire, de baja resistencia al flujo y de disposición central. Por el efecto aspirador del inyector entre el dispositivo de desplazamiento y las paredes, el caudal parcial pasa a través del canal de corriente secundaria prácticamente sin resistencia.In order to design geometrically similarly the hydraulic cross sections of the external current channel and inside, according to another feature of the invention, provided in the tubular heating body or between the elements opposite heaters an air displacement device, of Low resistance to flow and central arrangement. For the effect injector vacuum between the displacement device and the walls, the partial flow passes through the current channel Secondary without resistance.

De preferencia, el dispositivo de desplazamiento de aire en la entrada de aire tiene una sección transversal mayor que en la salida de aire. Puede estar diseñado aquí con forma ovalada. En un tipo de ejecución especialmente preferido, el dispositivo de desplazamiento se compone de dos semiesferas de diferentes diámetros unidas entre sí por un tronco de cono. En la medida en que se utilizan dos elementos calefactores de posición opuesta, el dispositivo de desplazamiento del aire se compone, de preferencia, de dos perfiles de placas simétricamente posicionadas.Preferably, the air displacement device in the air inlet has a larger cross section than in the air vent. It can be designed here with an oval shape. In a particularly preferred type of execution, the device displacement consists of two different hemispheres diameters joined together by a cone trunk. To the extent that two heating elements of opposite position are used, the air displacement device is preferably composed of two symmetrically positioned plate profiles.

Para la limpieza del aire se ha previsto convenientemente un filtro en la entrada de aire entre el cuerpo calefactor y la parte superior de la carcasa. En caso de que el cuerpo calefactor tenga forma de cilindro hueco, es conveniente un filtro de anillo. Adicionalmente, el filtro puede estar diseñado para la recepción de sustancias aromáticas. Para poder sustituir fácilmente este filtro, se ha previsto en entrada de aire de la carcasa una ranura, especialmente cubierta, para el intercambio del filtro. Convenientemente, se ha dispuesto además un difusor en la salida de aire.For air cleaning, a filter in the air inlet between the heating body and the part upper housing. In case the heating body has Hollow cylinder shape, a ring filter is convenient. Additionally, the filter may be designed for the reception of aromatic substances In order to easily replace this filter, a slot is provided in the air inlet of the housing, specially covered, for the exchange of the filter. Conveniently, a diffuser has also been provided at the outlet of air.

El dibujo muestra un ejemplo de ejecución de la invención en sección transversal esquemática a través de un secador de aire caliente sin ventilador.The drawing shows an exemplary embodiment of the invention in schematic cross section through an air dryer hot without fan.

En la carcasa 1 se ha previsto a distancia de las paredes laterales 2 un cuerpo calefactor 5 con forma de cilindro hueco que se extiende desde la entrada de aire 3 hasta la salida de aire 4. De forma central se ha dispuesto en este cuerpo calefactor un dispositivo de desplazamiento de aire 6 que abarca aproximadamente la longitud del cuerpo calefactor 5. Este dispositivo de desplazamiento de aire se compone de dos semiesferas 7 y 8 unidas entre sí por un tronco de cono 9. En la entrada de aire 3 se inyecta el aire frío 10 en la carcasa 1 por medio de un ventilador no representado. Un caudal parcial de aire pasa por el canal de corriente primaria 11 delimitado, por un lado, por el cuerpo calefactor 5 y por el otro lado por el dispositivo de desplazamiento del aire 6. Otro caudal parcial pasa a través del canal de corriente secundaria 12 delimitado por el cuerpo calefactor 5 y las paredes laterales 2 de la carcasa 1. En la salida de aire 4 se ha previsto, además, un difusor 13 desde el que sale el aire caliente 14.In housing 1, it is provided at a distance from the walls side 2 a heating body 5 shaped like a hollow cylinder that extends from the air inlet 3 to the air outlet 4. Centrally, in this heating body a air displacement device 6 covering approximately the length of the heating body 5. This device air displacement consists of two hemispheres 7 and 8 joined each other by a cone trunk 9. In the air inlet 3 is injected the cold air 10 in the housing 1 by means of a fan does not represented. A partial flow of air passes through the channel of primary current 11 delimited, on the one hand, by the body heater 5 and on the other hand by the displacement device of air 6. Another partial flow passes through the secondary current 12 delimited by the heating body 5 and the side walls 2 of the housing 1. The air outlet 4 has also provided a diffuser 13 from which the hot air comes out 14.

Entre la parte superior 15 de la carcasa 1 y el cuerpo calefactor 5 se ha previsto, además, un filtro de anillo 16 provisto, en caso dado, de sustancias aromáticas. Para poder renovar el filtro de anillo 16 desde el exterior, se ha previsto, sin estar representada, una ranura en la parte superior 15 de la carcasa, ranura que se puede tapar. Para aumentar el efecto inyección-aspiración y acelerar la corriente, el cuerpo calefactor 5 está recubierto en sus extremos por caperuzas 17 de poca resistencia a la corriente.Between the upper part 15 of the housing 1 and the heating body 5 a ring filter 16 is also provided, provided, in case given, of aromatic substances. To be able to renew the filter of ring 16 from the outside, is planned, without being represented, a groove in the upper part 15 of the housing, slot that can be covered. To increase the effect injection-suction and accelerate the current, the heating body 5 It is covered at its ends by little caps 17 current resistance.

Claims

1. Hot air dryer, characterized in that in a housing (1), at a distance from its side walls (2), a tubular heating body (5) is provided or, at least, two heating elements opposite each other that extend approximately from the air inlet (3) to the air outlet (4) in the longitudinal direction, where around the heating body (5) or the heating elements the air can circulate freely due to the distance of the heating body (5) a the walls of the housing (2).

2. Hot air dryer according to claim 1, characterized in that the tubular heating body (5) has a rectangular cross-section.

3. Hot air dryer according to one or both of the preceding claims, characterized in that a low resistance air displacement device (6) is centrally arranged within the tubular heating body (5) or between the heating elements opposite each other. to the flow

4. Hot air dryer according to claim 3, characterized in that the air displacement device (6) has a larger cross section in the air inlet (3) than in the air outlet (4).

5. Hot air dryer according to claim 3, characterized in that the air displacement device (6) has a profile approximately in the form of a support surface.

6. Hot air dryer according to claim 3, characterized in that the air displacement device (6) has an approximately zeppelin or drop-shaped design.

7. Hot air dryer according to claim 3, characterized in that the air displacement device (6) is composed of two hemispheres (7, 8) joined together by a cone trunk (9) and of different diameters.

8. Hot air dryer according to claim 3, characterized in that the air displacement device (6) is composed of two plate profiles positioned symmetrically with each other.

9. Hot air dryer according to one or more of the preceding claims, characterized in that approximately at the air inlet (3), between the heating body (5) and the upper part (15) of the housing (1), it has been provided a filter, especially an annular filter (16).

10. Hot air dryer according to claim 9, characterized in that the filter (16) is designed for reception of aromatic substances.

11. Hot air dryer according to one or both of the preceding claims 9 and 10, characterized in that a groove is provided in the housing (2) on the side of the air inlet (3), especially to replace the ring filter (16).

12. Hot air dryer according to one or more of the preceding claims, characterized in that a diffuser (13) is provided in the air outlet (4).

13. Hot air dryer according to one or more of the preceding claims, characterized in that the heating body (5) or the heating elements are coated at their ends by caps (17) of low current resistance.