SU151631A1 - Condenser Freezer - Google Patents

Description

Freezer condensers for freeze-drying plants are known, which contain a vertical cylindrical body with connections for the input of a gas-vapor mixture and non-condensable gases and an evaporation battery included in the refrigerant circulation system located inside the body and consisting of upper and lower headers connected by vertical pipes that are open. parallel sections.

In such condensers, ice is frozen on the evaporator tubes in the form of a ring, which makes it difficult to remove frozen ice from the evaporator tubes ..., "o ,,. G

The proposed freezer condenser differs from izvesgnyh in that each section of the pipe is provided with a common edge in the form of a solid metal sheet-rib so that the freezing of ice occurs evenly in the form of plates that, when hot refrigerant vapor is fed into the evaporator part of the condenser, they tamper and crawl to the bottom of the capacitor. The evaporative battery is mounted on an annular shell-base, and the upper shell is made removable, in addition, the condenser is equipped with a heater located under the days of the discharge of the condenser allows to increase the heat exchange surface and provides effective removal and melting of ice, as well as facilitates the revision of the evaporative battery.

Fig 1 schematically shows a freezer condenser; in fig. 2 is the same section along A-A in FIG. one; in fig. 3 is a diagram of the binding of the evaporative part of the condenser.

The condenser is made in the form of a cylindrical case /, inside which is placed an evaporative battery 2. Case Y contains the upper shell 3, the shell-base 4 and the bottom 5, under which is placed

No. 151631-2 -

heater 6. The evaporative battery 2 is attached to the shell-base 4 and contains a collector 7 and a lower collector 8 connected by evaporator tubes 9, which are arranged in parallel sections 10. The evaporator tubes 9 of each section 10 have a common edge 11 in the form of a metal sheet.

The cycle of the capacitor consists of two stages.

The first is the working stage of freezing water vapor {Fig. 3). During the start-up period, the valve 12 is opened, and then the Ui and 14 valves, the other, and the secondary valves are closed. The refrigerant is supplied to the evaporative battery 2 through the pipe-ca / 5 and exits through the pipe 16. The vapor-gas mixture enters the condenser through the pipe 17.

Freezing takes place in the annular space 18, where ice is frozen in the form of plates on the fins 11. Uncondensed gases exit through the nozzle 19 The second stage is the defrosting of the condenser. Open the valves 20 and 21, the rest are closed. Hot refrigerant vapors flow through the pipe 16 into the evaporation battery 2, the ice melts and crawls to the bottom 5 of the condenser, where by means of the heater 6 finally melts, and water is removed from the condenser through the pipe 22.

Subject matter

Claims (3)

1. Freezer condenser for freeze-drying plants, comprising a vertical cylindrical body with connections for the input of a gas-vapor mixture and non-condensed gases and an evaporation battery included in the refrigerant circulation system, located inside the body and consisting of upper and lower headers connected by vertical pipes, parallel sections, characterized in that, in order to increase the heat exchange surface and ensure efficient removal of frozen frost Each section of pipe is provided with a common edge in the form of a continuous metal sheet so that the freezing of ice takes place evenly in the form of plates, which, when the coolant lars are flowing, melt the condenser in the evaporation part of the condenser and slide to the bottom of the condenser. 2. Condenser-pop. 1, characterized in that, in order to facilitate the revision of the evaporating battery, the latter is mounted on the annular casing-base, and the upper casing is made removable. 3. In a capacitor in PP. 1 and 2 use a heater located under the bottom of the casing to accelerate the melting of ice.