SU787837A2 - Condenser-freezer for sublimation-type drying chamber - Google Patents

Description

The invention relates to apparatus used in freeze drying plants in the production of freeze-dried food products and can be used in the medical industry in the production of medical preparations. A condenser-freezer is known, comprising a housing with nozzles of a vapor-gas mixture and an outlet of uncondensed gases, having an evaporating battery inside, connected to the refrigerant circulation system and consisting of upper and lower collectors connected by vertical pipes arranged in parallel sections l}. A disadvantage of this device is the low heat transfer coefficient, which results in inefficient freezing of vapors. A freeze-condenser is a freeze-condenser containing parallel sections of vec- tive pipes connected to a vapor and liquid collectors connected to a common for all sections of the urine holder. In order to increase the heat transfer coefficient, a tube with evenly spaced throttle holes was introduced into the liquid collector from the side opposite to the holder level. The disadvantage of this condenser is also the inefficient freezing of the vapor and an additional number of sections is required to intensify the freezing. The closest to the invention to the technical essence and the achieved result is a condenser-freezer according to author. No. 606057, containing vertical evaporator tubes connected to manifolds, the lower of which is offset relative to the tubes, inside each of which cylindrical is coaxially mounted: an insert forming an annular gap, the equivalent diameter of which is 0.002-0,0004 pipe height I. The disadvantage of this device cham. This is due to the fact that it has large dimensions due to the significant number of sections, which complicates the system of automatic control of the flow rate of the liquid refrigerant, increases the intensity of the metal. The insufficiently high efficiency of the freezing of the vapor passing through it affects the duration of the stable operation of the vacuum stack.

The purpose of the invention is improving the manufacturability of the condenser-frozen.

The goal is achieved by the fact that it additionally contains a trap, which is equipped with nozzles connected to liquid and steam collectors, the trap being located in the middle part of the freezing condenser and made in the form of a hollow KOELZD with a concave lattice made of flat tubes the diameter of the evaporator tubes.

Fig. 1 shows a proposed freezer condenser (a section with a trap, general view, frontal plane); figure 2 is a view along arrow A in figure 1; figure 3 is a view along arrow B in figure 1; 4, a trap; figure 5 is a section bb In figure 4.

Condenser freezer contains vertical evaporator tubes 1 ,. an insert 4 is located coaxially located inside each pipe coaxially connected to the liquid collector 2 and the steam collector 3 by means of pipes b and 7. The trap is made in the form of a ring 8 connected to the tubes 9 forming the grid.

The device works as follows.

Low-temperature refrigerant, such as liquid freon-22, through the liquid manifold 2 enters the annular gap of the inner wall of the pipe 1 and insert 4, where

through the wall of the pipe 1. heat transfer from condensable and freezing vapors to the refrigerant occurs. The liquid refrigerant thereby evaporates and is removed from the condenser through the steam collector 3. At the same time, the liquid agent enters through the liquid pipe b in the ring 8 and the tube 9. Non-condensed on the pipes 1 pairs of moisture fall into the trap,

. where it is deposited on the surfaces of the ring 8 and the tubes 9. The liquid refrigerant then evaporates and enters the steam manifold 7 through the steam manifold 3.

Claims (3)

Invention Formula Freezer Condenser for Freeze Dryer 20 ed. St. No. 606057, which means that, in order to improve manufacturability, the condenser-freezer additionally contains a trap, which is equipped with nozzles connected to the liquid 25 and a steam collector, with the trap located in the middle part of the condenser-freezer and made in the form of a hollow flat ring with a concave lattice of flat tubes, 30 located in increments equal to the external diameter of the evaporator tubes. : Information sources, taken into account in the examination (1. USSR Copyright Certificate 35 151631, class F 26 B 5/06, 1962. 2. Authors certificate of the USSR 584174, cl. F 26 B 5Y06, 1975. 3. USSR author's certificate number 606057, cl. F 26 B 5/06, 1974.