FI98901B - Method for regulating the temperature in a cargo space - Google Patents

Abstract

Method for regulating the temperature in cargo space and for maintaining the temperature at the desired values, the method employing temperature regulating and control apparatus so that temperature peaks are reduced through adjustments to the volumetric flow delivered to the heat exchanger 4 and by a special reserve that is produced by a liquid accumulator 13. The air 22 blown into the space from above by a blower 5 produces a suction in an injector duct 21, by means of which the cooled air, which has already circulated around the space once, prevents the load from overheating. <IMAGE>

Description

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The present invention relates to a method for controlling and maintaining the temperature of structures requiring precise thermal control S of slag and the like at desired values.

The invention relates in particular to the thermal control of load baskets, but is also applicable to the maintenance and temperature control of a very large number of other objects-SL

10 Especially when transporting foodstuffs during the winter, the load baskets must be heated in such a way that the goods to be transported do not freeze or spoil due to the transport being too cold. Often suitable temperatures for transport are between 0 and +20 degrees.

The problem in heating the load baskets is to keep the prevailing and desired temperature 15 constant anywhere inside the slag basket. Today, the most widely used system for controlling the temperature of load baskets is to control air flows in the basket or to provide air curtains as defined in the Fi 89691 patent. However, these operations have not provided sufficient heat uniformity for the air ducts and nozzles, since the supply 3ma is not uniformly of the desired temperatures, due to the air. *, 20 being blown into the basket either overheated or cold, depending on whether the fan rotates s ·; and / or burner or el s: s • *. . *. The object of the present invention is to provide a new type of temperature control method. which provides a decisive remedy for the disadvantage prevented above.

The characteristic features of the heat control method according to the invention are set out in the appended claims. By means of the invention, the heat unevenness which is a bottleneck in the conventional method is eliminated and the load basket is provided by:. steady and balute heat flow to the load compartment heat ducts and nozzles. Other advantages and embodiments of the invention will become apparent from the following embodiments.

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The invention will now be described with reference to the accompanying drawings, in which Figure 1 shows a slag basket 7f .., —- .., ;;. * - .....: .-:> · ^ -ν- ;:: -: provided with a heat control system according to the invention. -; r ...... ·· “* '-arm ::; 98901 2 schematically and Fig. 2 shows a schematic diagram of an air flow mechanism of a load car with a thermally controlled method according to the invention. The temperature sensors (3) measure the body temperature and transfer the data to the heat suction card (2), which is an adjustable electrically controlled volume flow control unit (14) in the desired direction, directing more or less volume flow to the heat exchanger (4), thus changing the blowing air temperature. From the heat exchanger (4), the liquid is transferred back to the energy source (10) by means of a pump (9). The volume flow that is not needed in the heat exchanger (4) is transferred to the strainer (13) by means of the control flap (14), from where it is transferred again via the pump (9) to the energy source (10), continuing its circulation. The continuous fan (5) included in the equipment provides a constant and constant amount of air to the ductwork and nozzles. Thanks to the control system, the air entering the heat exchanger (4) does not have excessive temperature differences, which results in even mixing.

The energy source (10) is tennostatically controlled, so it heats the liquid in the desired temperature range. The temperature control device is also connected to the power supply unit (1), the energy supply • • 20 teaspoons (10) fuel storage (6), the exhaust pipe (7) and the setting temperature of the temperature control device. digital display of grids and body heat (12).

J ·. Fig. 2 shows schematically the self-flow mechanism, where the heat control device of Fig. 1 supplies suitably warm air along the inner surface of the roof of the load body (15) to the rear of the load body 25, from the load to the rear of the load body and the floor (16) of the load 18) through a dual front. between the nozzle (19) into the suction duct (20), then dividing into the heat exchanger flange (4) and ‘···. into the injector channel (21), from which the colder air already circulated by the body is injected over the load (23) of the first I · ··· pallets (17) to prevent excessive movement of said load (23) | 1 · ... 30 heating. The injection flow is provided by the blower (5) from the S * suction effect of the air flow (22).

3,98901

The control system according to the invention has been described above only by means of exemplary applications, to which even substantial changes can be made without departing from the scope of the appended claims.

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Claims (5)

A method of controlling heat in a cargo space to which the heating control / control device includes a temperature sensor (11), heat detector (3), a heat control board (2) which controls an insealable electrically controlled volume control unit (14), a fan (5), a heat exchanger (4), a thermostatically controlled energy cone (10), an injector channel (21), a pump (9) for liquid circulation and a water accumulator (10); by means of which air with suitable heat is provided from the openings of the continuously operating humidifier (5) and the injector duct (21) into the cargo space, characterized in that the volume flow of the hot water stream entering the exchanger is regulated by the electrically controlled regulating unit (14). to eliminate the heat peaks caused by the energy source (10) inside the cargo space (15). Method according to claim 1, characterized in that the cooled air flow (22) coming through a suction duct (20) is guided in a desired condition into the injector duct (21), from which flow the main pallets (17) prevent from overheated. Method according to claims 1 and 2, characterized in that the volume current which does not go to the exchanger (4) passes through an external accumulator (13) with the pump (9) into the power source (10) to reduce the need to have the energy source (10) running. ·· · Method according to claim 1, characterized in that the flap (5) operates continuously at a constant speed. • ·· »· • · Method according to claim 1, characterized in that the pump: (9) operates continuously at a constant speed. • 0 0 ·· «· *« e • »· * ·· • 1 ·» ·· • · <* r «« ·