DE102017000385A1 - Recycling device of refrigerant gases - Google Patents

Abstract

The environmental idea is becoming more and more important worldwide. In order to be able to continue to ensure and promote protection, people's actions and thinking need to be changed. Environmental protection in the field of refrigeration technology is manifested by means of leak tests in refrigeration and air conditioning systems, which are tested once a year, starting at a capacity of 3 kg have to. (old F-gases regulation) In the field of recycling there are environmental potentials that have to be exploited. However, this idea is not to be transferred to the recycling of household refrigerators and refrigerators, but refrigeration and air conditioning systems are the focus of considerations.With this device, the goal of reducing the refrigerant emission is pursued.However, to this day, no standards are appropriate Environmental protection set. This is the case especially for large refrigeration and air conditioning systems. In particular, the assumptions in the EN378 are not quite true.

Description

Why exactly is this device so important to the environment?

The device is used for the recycling of refrigeration compressors.

We use this device to separate the outgassing residual refrigerant from the oil. The reductions of the refrigerant emissions towards the environment should be achieved.

Until now, refrigeration systems have been lowered to 0 bar or minus 0.5 bar when recycling to an absolute pressure in the system, then the system is considered to be free of refrigerant. (Absolute pressure = is the pressure in the refrigeration system)

According to EN 378 Part 4 6.3.2.1c, the following applies:

"Before disposing of the refrigeration system, the refrigeration system components or refrigeration system must be sucked to a pressure of 0.3 bar absolute or lower."
Source: EN 379 part4

→ Problem / Disadvantage:

If there is a residual amount of refrigerant in the refrigerant oil of the compressor, it will gradually exhaust at atmospheric pressure.

As a result, the environment is heavily polluted with refrigerant emissions.

To avoid this, the legislature introduced a law that reads as follows:

"... Refrigeration systems from 3 kg onwards are to be checked once a year for leak tightness, and from 30 kg twice to check for leaks ..." (according to the old F-gas regulation)

The change in the obligation to inspect refrigeration systems was regulated on 01.01.2015 by the New F-Gas Regulation.

This problem is greatly reduced with the use of the apparatus for recycling refrigerant gases.

Operation when using the recycling device

For ease of understanding, a compressor change (Danfoss Maneurop) of a conventional refrigeration system can be used.

The recycling device serves as a density chamber, from which the exiting cooling gases are extracted. From a pre-defined amount of oil in a tested cooking container, the cooking of the oil takes place.

From this process, further refrigerant gases can be produced, which can be sucked off by means of my recycling device and pumped into a recycling bottle.

Repair before the customer:

The compressor is sucked off and the system pressure is at this time at minus 0.2 bar. In the following step, the replacement of this compressor takes place. The disassembled refrigerant compressor is closed, including original screw caps.

Refrigerant recovery from Kälteol in the compressor, in the company:

Subsequently, the rearrangement of the compressor in the chamber of the recycling device provided that the compressor no connections for a Schrader valve.

After closing the chamber, a vacuum is created with a vacuum pump and the tap to the kettle can be opened. It should be noted that the suction device has already been taken during operation. If necessary, the compressor can now be drilled through the existing interventions (Fig. 1). The compressor should then be positioned so that the refrigeration oil contained therein can drain. Through the suction device, the pressure in the recycling chamber drops to a value of 0 bar or lower. This forms the basis for opening the recycling chamber, after which the tap has been closed accordingly, and for replacing the compressor.

If compressors with Schrader valve are available, they can be connected directly to the vacuum recycling chamber. The drilling is not necessary, but here the same premise applies as already explained.

"The compressor should then be positioned so that the refrigeration oil contained therein can drain off."

According to the amount of refrigerant oil, the following should be noted:

When reaching the maximum oil level, it is advisable to boil the oil for 8 hours at 70 degrees Celsius and to discharge the escaping refrigerant gas into the recycling bottle. Subsequently, the refrigeration oil can be drained and transported environmentally friendly by the respective waste disposal company.

By this process, an immense leakage of the refrigerant gas into the atmosphere can be avoided.

• Bild 1 zeigt das Recyclinggerät in der Frontansicht, mit geöffnetem Deckel oben und der Tür rechts. Bei diesem Bild sind deutlich die Handeingriffe zu sehen. Unten an dem Recyclinggerät befindet sich der Kochkessel für das Kälteöl
• Bild 2 zeigt das Recyclinggerät von der Rückseite mit dem Anschluss A1 oben für die Vakuum-Pumpe und Anschluss A2 für den Verdichter
• Bild 3 zeigt das Recyclinggerät von der Seitenansicht mit Kugelhahn H1 zum Kochkessel und Anschluss A3 für das Absauggerät
• Bild 4 zeigt das Recyclinggerät mit angeschlossener Vakuum-Pumpe und Absauggerät, dass jeweils über eine Manometerbatterie angeschlossen ist
• Bild 5 zeigt das Recyclinggerät nach dem der Verdichter eingestellt worden ist, und ein Vakuum erzeugt wird mit angeschlossenem Manometer
• Bild 6 zeigt wie das Öl gekocht wird und mittels des Absauggerätes das Kältemittelgas in die Recyclingflasche gepumpt wird

An embodiment of the invention will be explained with reference to the photos 1 to 6:

• Figure 1 shows the recycling unit in front view, with the lid open at the top and the door on the right. In this picture clearly the hand interventions are to be seen. At the bottom of the recycling unit is the cooking kettle for the refrigeration oil
• Figure 2 shows the recycling unit from the back with connection A1 at the top for the vacuum pump and connection A2 for the compressor
• Figure 3 shows the recycling unit from the side view with ball valve H1 to the boiling kettle and connection A3 for the suction unit
• Figure 4 shows the recycling unit with connected vacuum pump and suction unit, which is connected via a pressure gauge battery
• Figure 5 shows the recycling unit after the compressor has been set and a vacuum is created with the manometer connected
• Figure 6 shows how the oil is boiled and the refrigerant gas is pumped into the recycling bottle by means of the suction device

- Manometer (Figure 6), vacuum pump (Figure 5), suction unit (Figure 6) and recycling bottle (Figure 6) are not the subject of the invention.

LIST OF REFERENCE NUMBERS

A1

Connection for the vacuum pump

A2

Connection for the compressor

A3

Connection for the suction device

H1

Ball valve of the kettle

Claims (1)

At publication site: There are no claims

Images