CN101251460A - Method for the measurement of moisture and oil content in recovered refrigerants - Google Patents

Abstract

The present invention discloses a measurement method for the content of water and oil in recycled refrigerant, aiming to provide a measurement method which can effectively judge the content of water and oil in recycled refrigerant and is beneficial to solve the problems in actual operation. The present invention comprises the following steps that: the weight of a drying filter is measured and recorded as G1; the drying filter is filled with recycled refrigerant and then has the weight measured and recorded as G2; the refrigerant is kept liquid and is fully absorbed by the drying filter, then the refrigerant liquid in the filter is exhausted, and the drying filter is measured and recorded as G3; the emptied filter is put into a drying box, and after the filter is fully dried, the filter is measured and recorded as G4; G2 minus G1 is the weight of the refrigerant poured into the drying filer; G3 minus G1 is the weight of water and oil in the recycled refrigerant; G3 minus G4 is the weight of the water in the recycled refrigerant; G4 minus G1 is the weight of the oil in the recycled refrigerant. The method of the present invention is simple, economical and reliable.

Description

Method for the measurement of moisture and oil content in recovered refrigerants

technical field

The present invention relates to a measurement method, more specifically to a measurement method for calculating the moisture and oil content in recovery refrigeration.

Background technique

For environmental protection and other requirements, it is necessary to recover refrigerants in various refrigeration systems. During the operation of the refrigeration system, due to reasons such as sealing and lubrication, the recovered refrigerant must contain moisture and lubricating oil. If the recovered refrigerant is to be recovered and reused, or the recovered refrigerant is used to judge the operation of the refrigeration system, the water and oil water content in the recovered refrigerant must be measured. However, there is no simple, economical and feasible method for determining the moisture and oil content in the recovered refrigerant.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art and provide a water and oil content in the recovered refrigerant that can effectively judge the moisture and oil content in the recovered refrigerant, which is beneficial to solve the problems in actual operation. measurement method.

The present invention realizes through following technical scheme:

A method for measuring moisture and oil content in the recovered refrigerant, characterized in that it comprises the following steps:

(1) Weigh the weight of the dry filter and record it as G1;

(2) Fill the dry filter with recovered refrigerant, weigh it and record it as G2;

(3) Keep the refrigerant in a liquid state. After being fully absorbed by the dry filter, empty the refrigerant liquid in the filter, weigh it and record it as G3;

(4) Put the emptied filter into the drying box, after the filter is fully dried, weigh and record it as G4;

(5) Use the weight G2 in step 2 to subtract the weight G1 in step 1 to be the amount of refrigerant charged in the dry filter; use the weight G3 in step 3 to subtract the weight G1 in step 1 to be the recovered refrigerant The weight of water and oil in the medium; subtract the weight G4 in step 4 from the weight G3 in step 3 to get the weight of water in the recovered refrigerant; subtract the weight G1 in step 1 from the weight G4 in step 4 to get the recovered The weight of oil in the refrigerant.

The ambient temperature in step 3 is generally higher than the freezing temperature of the refrigerant and lower than the freezing temperature of water. The temperature of the drying oven in step 4 is generally higher than normal temperature and lower than the temperature at which the oil is violently volatilized.

The present invention has following technical effect:

Using the measurement method of the present invention can effectively judge the moisture and oil content in the recovered refrigerant, which is beneficial to the recovery and reuse of the recovered refrigerant, and the refrigeration system can be judged by the moisture and oil contained in the recovered refrigerant The operation status is conducive to solving the problems in actual operation. Moreover, the method is simple, economical and reliable.

Description of drawings

Fig. 1 is a flow chart of the method for measuring the moisture and oil content in the recovered refrigerant of the present invention.

Detailed ways

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and taking R22 recovered refrigerant as a specific embodiment.

Fig. 1 is the flow chart of the measuring method of moisture and oil content in the refrigerant that the present invention reclaims, and the measuring method of moisture and oil content in the refrigerant that the present invention reclaims comprises the following steps:

(1) First, select a small dry filter corresponding to the recovered refrigerant to be measured. In this embodiment, a small dry filter dedicated to R22z is selected, and a check valve is installed at both ends of the filter. The precision balance weighs the weight of the dry filter at this time and records it as G1.

(2) Open the one-way valves at both ends, fill the recovered refrigerant from one end of the dry filter until the liquid refrigerant flows out from the one-way valve at the other end, then close the one-way valves at both ends of the filter, and use high-precision The scale is weighed and recorded as G2.

(3) Put the filter full of recovered refrigerant into the -10°C environment, take out the filter after 48 hours, make the dry filter fully absorb the recovered refrigerant, open the one-way valve, and empty the filter The refrigerant liquid in the liquid is weighed with a high-precision balance and recorded as G3.

(4) Put the filter with the one-way valves at both ends into a drying oven at a temperature of 35° C. Take out the filter after 30 minutes, weigh it with a high-precision balance and record it as G4.

Use the weight obtained by the above method to calculate: the weight G3 in step 3 minus the weight G4 in step 4 is the weight of moisture contained in the refrigerant, and the weight G4 in step 4 minus the weight G1 in step 1 is the refrigerant The weight of the oil contained in the refrigerant, the weight G2 in step 2 minus the weight G1 in step 1 is the weight of the recovered refrigerant charged, the weight G3 in step 3 minus the weight G1 in step 1 is the weight of the recovered refrigerant The total amount of water and oil contained.

Claims (3)

1, the measuring method of moisture and oil content in a kind of cold-producing medium of recovery is characterized in that, comprises the steps:

(1) weight of weighing device for drying and filtering and be recorded as G1;

(2) in device for drying and filtering, be full of the cold-producing medium of recovery, weigh and be recorded as G2;

(3) make cold-producing medium keep liquid, after the drying filtrator fully absorbed, the refrigerant liquid in the emptying filtrator was weighed and is recorded as G3;

(4) filtrator after the emptying is put into drying box, after the abundant drying of device to be filtered, weigh and be recorded as G4;

(5) the weight G1 that deducts in the step 1 with the weight G2 in the step 2 is the refrigerant amount that is charged in the device for drying and filtering; The weight G1 that deducts in the step 1 with the weight G in the step 33 is moisture and an oily weight in the cold-producing medium that reclaims; The weight G4 that deducts in the step 4 with the weight G3 in the step 3 is the weight of moisture in the cold-producing medium that reclaims; The weight G1 that deducts in the step 1 with the weight G4 in the step 4 is the weight of oil in the cold-producing medium that reclaims.

According to the measuring method of moisture and oil content in the cold-producing medium of right 1 described recovery, it is characterized in that 2, the environment temperature in the described step 3 is higher than the temperature of solidification of cold-producing medium, be lower than the freezing temperature of water.

According to the measuring method of moisture and oil content in the cold-producing medium of right 1 described recovery, it is characterized in that 3, the temperature of drying box is higher than normal temperature in the described step 4, be lower than the evaporating temperature of oil.

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