SE507296C2 - Method and apparatus for drying wet goods - Google Patents

Abstract

Process for and arrangement for a process to enable a cooling cycle to switch to two or several pairwise different temperature ranges for the evaporator-condenser, also with different temperature spans in between, whereby a programme controller (P) transmits signals initiating the change-over function in such a way that more or less cooling medium is taken from or passed to a coolant container (R2) connected in parallel with the condenser (K) in response to impulses from external transducers signalling that a lower or higher amount of energy should be given off by the cycle, and that when drying materials most energy is given off when the material is coldest and wettest at the start of the drying process and that instead the temperature is highest at the end, and that when utilising the system for heating it is now possible to select different suitable temprature ranges by means of the change-over function, which are adapted to the possible energy absorption and dissipation, respectively, and that defrosting can now be effected during continuous operation and utilisation for air conditioning becomes possible as also the cleaning of flue gases through moistening and electrical charging and following liquid condensation separation on the evaporator (F1, F2).

Description

5Û7 296 Bcskrlvßvllgfirpdlenflrdvltlfl The present invention is a device for satisfying the drying needs, which the drying process (according to claim 1) requires. It communicates with each evaporator and condenser heater of a refrigeration machine, to which evaporator comes the dry air from the air conditioner, where the air is heated. This air conditioner then uses the air conditioner to heat the air. The air conditioner then returns the air to the air conditioner and humidifies it. The temperature sensor has reached the desired temperature. The temperature sensor receives the signal from the air conditioner. The air conditioner is built using well-known refrigeration technology. The air conditioner has four valves (a-d). and an extra refrigerant tank (R 2), which five units are also connected to the cooling process. The five valves are controllable connected to the program (P), which gives control signals for opening and closing, on the instructions of two also connected (t1ocht2) which are placed at the condenser and evaporator. At certain set temperatures, the program gives a control signal to open the valves (c) after the set temperature, so that the temperature of the condenser can be increased.

At other preset values, the valve (a) upstream of the additional container is instead controlled to open, so that the medium is transported to the circuit and flows into the container and the selected condenser (depending on the quantity of condensate that is to be supplied). This can be controlled by closing the throttle valve or remaining open. The temperature of the evaporator (tz) at the start of the drying process is +10-20°C or lower and the condenser +40-50°C or higher, which must be increased stepwise during the drying process. These are independent of each other.

Claims (2)

1. 20 '507 296 Patent No. Patent Claims 1. Drying procedure. In a cooling process used for drying, where a cooling machine is connected to a drying chamber and the working temperature of the cooling machine and the temperature of the heating element are adjusted and the working temperature of the cooling machine and the working temperature of the cooling machine are adjusted, the drying process takes place under changing temperatures, the temperature of the heating element is increased or decreased, and which is controlled by a program (P), whereby the drying process takes place by removing the air from the condenser and removing the air from the condenser and removing the air from the heating element :in one: from a :in reereen pereuem preeefed refrigerant container (R 2), which is controlled by the program so that at the cooler (R 2) a first valve (z) opens for inlet or a second valve (q) opens for outlet of refrigerant and the condenser Soattenüeverltíflwopens for outlet and the remaining valve for outlet of refrigerant, so that at selected changed temperatures the steam condenser (K) is obtained, which is usually +1o-2o'Cresp. +4o-so°coehtöfeufivisi +1o°Cresp. + 40°Cor +20°Cresp. +50“C,vükatanpaamreorchtanperannpmsedmiflerastepmdaprwessensgâng The temperature of the steam and condenser is reduced so that the temperature of the steam and condenser is +20°C or +70°C, or if the temperature is lower or higher, the valves in the Qochev.event valve (e) are controlled so that the second valve (c) opens and closes when the refrigerant is removed and the control valve (a) is used, when the need is increased. The third and fourth valves (d) and the throttle valve (e) open or close when necessary, also changing the temperature of the steam and condenser. 507 2.96 Patentflmzv 2. Device for drying. 5 Device for drying the wet goods by means of a separate drying chamber, which communicates with each an evaporator and a condenser in a refrigerating machine so that the air from the drying wet goods passes through the evaporator before the dehumidified air is transferred to the condenser before the air is returned to the drying chamber, characterized in that the cooling process of the refrigerating machine, in addition to the compressor (C-M), condenser (K), throttle valve (e) and evaporator (F), as well as a refrigerant container (R 1) placed after the evaporator, contains an additional refrigerant (R 2) connected in parallel with the condenser, whereby the inlets of this container and the condenser respectively The outlet is provided with valves (t1) and (t2) which are closed by the control path of the program, and the condenser and the evaporator are equipped with temperature sensors (t1, t2) which are connected to the program, which also controls the throttle valve and the compressor, whereby the program controls the drying process through signals from t so that refrigerant is supplied to the cooling process from the additional refrigerant accumulator or removed from the cooling process tank, in such a way that at the start of the automatic process the temperature (t2) in the evaporator is + 10-20°C or lower and the (t1) in the condenser is + 40-50°C or higher, to be gradually increased during the process, independently of these respective temperatures.