SU1232905A1 - Air separating system of refrigerating machine - Google Patents

Description

2, System pop. 1, so that the bone pipeline

The invention relates to refrigeration and can be used primarily in large refrigeration machines and systems.

The purpose of the invention is to increase the efficiency and productivity of the system.

The drawing shows the proposed system.

The system contains a condensate pipe 1 that goes to a station regulating station (not shown), cooling water pipelines 2 and 3, a receiver 4 with a condenser, a refrigerant vapor pipe 5, from a compressor (not shown), control valve 6, solenoid fans 7 , shut-off valves 8, air cooler 9, shell-and-tube type, liquid refrigerant level indicator 10, pipeline 11 refrigerant slots, all to the compressor suction inlet pipe, separation vessel 12, hydraulic lock 13, vapor-liquid-liquid pipeline 14, pulse sampling tube 15 laziness, tube 16 with a thermal bulb 17, a differential pressure sensor 18, a thermal bulb 19 with a tubing 20, a temperature relay 21, an exhaust line 22, a water tank 23 and a casing 24,

The thermal bulb 17 of the differential pressure sensor 18 is filled with a clean refrigerant, such as ammonia, and is installed in the liquid portion of the receiver 4, where ammonia and oils are collected.

The pulse tube 15 of the differential pressure sensor 18 is inserted in the upper part of the air-cooler 9 and the transfer fluid can be filled up to the separation vessel 12.

The vapor-gas-liquid pipeline 14 is made in the form of a coil with an area of passage through passage equal to 1-3 sums of the flow area of pipeline 11, refrigerant vapor and pipeline with a glow connected to the air exhaust line from the air trap.

condensate water to air cooler 9,

The vapor-gas-liquid pipeline 14 is provided with a jacket 24, the channel between the housing 24 and the pipeline 14 is included in the cutting of the line 22 to the temperature relay 21,

The bulb 19 is partially filled with a refrigerant, such as refrigerant.

The differential pressure sensor 18 is equipped with two controllable contacts, one of which is connected in series with the controllable contacts of the level controller 10 and the coil of the solenoid valve 7 on the condensate supply pipe to the air cooler 9. The other contact controls the solenoid 7 on the air outlet line 22.

In the absence of air in the chiller, the pressure difference between the vapor of the refrigerant, the agent in the chiller and the vapor in the thermowell 17, measured by the differential sensor 18, is equal to zero or a predetermined value (d,

 L SCTA equality is true for both running and not running chiller.

In this case, the differential pressure sensor 18 closes the solenoid valves 7 via an electrical circuit (the controllable contacts are open). Temperature switch 21 is set to

the opening of line 22 only at the temperature of the bulb 19, less than or equal to the target (T „)

Thus, the exhaust line 22 is open while

fulfilling the conditions of RR, R, “D and

T, q t T, д d. The condensate supply pipe to the air-cooler 9 is also open when two conditions are fulfilled simultaneously:

the coolant level in the air cooler 9 is lower than the set value (the control contacts of the differential sensor 18 and the indicator 10 are closed).

31

These structural elements provide for the separation of air at a given temperature T, dd and pressure difference ARts dSistema works as follows.

In the presence of air in the refrigerating machine and when it stops, the air discharge line 22 is closed by the air exhaust line 22 and the condensate supply to the air cooler 9 is blocked by the liquid refrigerant level indicator 10.

When the machine is started up by boiling the refrigerant inside the pipes, the annular cavity is cooled. The refrigerant vapor in it is condensed and poured through the hydraulic lock 13 via the vapor-gas-liquid pipeline 14 to the receiver 4. A new portion of the air-refrigerant vapor is supplied to the condensed refrigerant vapor. The air content in the mixture in the annular space increases, and thus the heat supply with the new incoming portions of the mixture of air and refrigerant decreases. T decreases to T, d and below. Temperature switch 21 opens line 22 and exhales air into tank 23 with water.

When air leaks into the car within 20–80% of the capacity of the air separation system, the refrigerant content in the mixture entering the air cooler 9 is low due to the large amount of air leaking into the car and the condensation of particles of incoming vapor by the flowing cold condensate. The hydraulic resistance of the pipeline 14 is small, and therefore the release of air regulates the temperature switch 21. With the passage of air in the gap mezkdu pipeline 14 and the casing 24, it cools the pipeline 14 and through it additionally cleans the mixture of air and refrigerant from the refrigerant.

Editor S.Saenko

Compiled by V.Latshgev Tehred L. Serdyukova

Order 2755/38 Circulation 482 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raupska nab. D. 4/5

Production and printing company, Uzhgorod, st. Project, 4

32905

When air leaks into the machine within up to 20% of the performance of the air-cooling system, the refrigerant content in the mixture entering the 5 air cooler 9 is large, since F P ,, in this case is insignificant

e

Dr,

Refrigerant vapor

ten

15

exceeds about condensate into the air cooler 9, and the condensate flows through the pipeline 14, significantly reducing its flow cross-section and, thus, increasing the hydraulic resistance to the flow of the mixture. In this case

.g PCM.CH-r “Ap D Hydr-pressure difference in the vapor cavity of the receiver 4 and the pure refrigerant in the thermal bottle 17, i.e. measured A Pig

decreases faster AR on

CJHcCfl

JR,

NDTI This ensures the earlier triggering of the differential pressure sensor 18. Then the solenoid valves 7 close and the air cooler is not cooled. However, due to the heat capacity of the air cooler and cooling of the total vapor-gas-liquid pipeline 14 with ambient air, the mixture is enriched with air in the cavity of the air cooler 9.

After part of the condensate flows into the receiver 4, the differential sensor 18 triggers, opening the solenoid valves 7. The air in the air cooler 9 is cooled to T T, air is released through the relay 21. When the pressure drops, the differential sensor 18, cross valve solenoid valves release 7

40

Thus, the air separation takes place at an average temperature higher than and the total pressure is higher than D e air release only at, e. This saves a lot of energy on the air separation from the chiller.

Proofreader M.Sharopsh

Claims (2)

1. AIR COOLING SYSTEM OF THE REFRIGERATING MACHINE, containing an air separator with an air exhaust line and connected to the receiver by steam-gas mixture and condensate exhaust lines a differential pressure sensor with an impulse tube and a thermal bulb filled with clean refrigerant and installed in the liquid part of the receiver, which distinguishes that, in order to increase the efficiency and productivity of the system, the pulse tube of the differential pressure sensor is introduced into the upper part of the air separator, and the gas and steam supply lines mixture and condensate formed in a common water-vapor piping. S 2. The system according to claim 1, with a .rain _{and the} fact that the steam-gas-liquid pipeline is equipped with a casing included in the line of exhaust air from the air separator.