Auxiliary device for processing water leakage of evaporator of refrigerating machine

Abstract

The utility model relates to the technical field of mechanical equipment maintenance devices, in particular to an auxiliary device for processing water leakage of a refrigerator evaporator. The auxiliary device for processing water leakage of the refrigerator evaporator comprises an inner shell, an outer shell is arranged on the outer side of the inner shell, a steam inlet is formed in the outer shell, the inner shell is connected with an air inlet through an equal-diameter connecting pipe, and the inner shell is connected with an air outlet through a variable-diameter connecting pipe. According to the device, high-temperature compressed air is provided for the evaporator in the overhauling and purging stage; in the vacuumizing stage, whether the water content of pumped air exceeds the standard or not is checked; in the refrigerant adding stage, the refrigerant temperature is increased, and the adding time is shortened; and the device can meet the maintenance requirements in different time periods.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical equipment maintenance devices, in particular to an auxiliary device for processing water leakage of a refrigerator evaporator. Background Art

[0002] During the operation of the refrigerator, evaporator leakage occurs. Due to the lack of necessary maintenance tools and means in the process production line, the cost of replacing the evaporator is high and the construction is difficult. Under normal circumstances, it requires water or steam cleaning, purging, vacuuming and other treatments, which take a long time.

[0003] When the refrigerator is in normal working condition, the outer wall of the copper tube is a mixture of refrigerant and lubricating oil, and the inside of the copper tube is cold water; when the evaporator copper tube leaks, cold water will enter the full-liquid evaporator tube, causing a large amount of industrial salt to adhere to the outer wall of the copper tube, which must be cleaned and removed as much as possible; but because of the presence of lubricating oil, cleaning is more difficult, so it is necessary to completely disconnect the pipe connecting the evaporator and the system, and gradually discharge the mixture of oil, cold water and industrial salt at the bottom of the evaporator, and finally completely clean up the system moisture, air, and debris to ensure efficient operation of the refrigeration system.

[0004] The on-site normal temperature cleaning and purging treatment method not only takes a long time to repair, but is also prone to incomplete purging during the vacuuming process, resulting in incomplete purging of moisture, which affects the refrigeration efficiency of the unit. Utility Model Content

[0005] In view of the above deficiencies in the prior art, the purpose of the utility model is to provide an auxiliary device for dealing with water leakage in the evaporator of a refrigerator, which provides high-temperature compressed air to the evaporator during the maintenance and purge stage; during the vacuum stage, checks and verifies whether the water content of the extracted air exceeds the standard; during the refrigerant addition stage, increases the refrigerant temperature and shortens the addition time; the device can meet the maintenance needs of different time periods.

[0006] The utility model is realized by adopting the following technical solutions:

[0007] The auxiliary device for handling water leakage of the refrigerator evaporator comprises an inner shell, an outer shell is arranged outside the inner shell, a steam inlet is arranged on the outer shell, the inner shell is connected to the air inlet through an equal-diameter connecting pipe, and the inner shell is connected to the exhaust port through a reducing connecting pipe.

[0008] The outer shell is provided with a condensate discharge port, which is located on a side close to the air inlet, and the steam inlet is located on a side close to the exhaust port.

[0009] The exhaust port is connected with an exhaust port connecting pipe, and a pressure gauge is arranged on the exhaust port connecting pipe.

[0010] The steam inlet is connected to a steam inlet connecting pipe, and a steam inlet connecting pipe is provided with a steam inlet valve.

[0011] The condensate discharge port is connected with a condensate discharge port connecting pipe. The space between the outer shell and the inner shell constitutes an outer jacket of the equipment.

[0012] The equal-diameter connecting pipe is connected with a silicone inspection port, and the air inlet is connected with an air inlet connecting pipe.

[0013] In order to ensure the overall cleanliness of the facility and reduce secondary pollution, the entire facility is made of 304 material.

[0014] The steam-conducting parts of the equipment's outer jacket must be insulated to prevent burns during operation.

[0015] The sealing performance of each flange connection, valve, instrument installation and other parts should be guaranteed to be intact.

[0016] Step 1

[0017] After the initial cleaning of the evaporator, a large amount of pollutants are discharged from the bottom of the tank, but there is a lot of moisture remaining on the outer wall of the high-efficiency heat exchange tube due to the presence of spun threads, and the tubes are closely spaced, making purging more difficult.

[0018] Use the casing heating device to heat the compressed air, and use the large flow of high-temperature compressed air to gradually discharge the moisture on the outside of the pipe wall. Install a manual diaphragm valve at the instrument compression inlet (air inlet) and dry hot air outlet (exhaust port) to control the flow and ensure the valve sealing performance to ensure that there is no leakage. When the compressed air is connected, close the silicone inspection port, open the stop valve at the steam inlet pipeline, open the steam condensate discharge valve, install a field thermometer at the outlet of the heating device, and adjust the opening of the steam valve according to the dry hot air outlet temperature (because the evaporator generally has rubber and plastic insulation, it is recommended that the dry hot air outlet temperature be controlled below 80°C to prevent burns to personnel and not cause damage to the equipment insulation).

[0019] Introduce dry hot compressed air into the bottom of the evaporator, remove the pipe or valve at the top to discharge the compressed air, maintain a certain air flow rate, slowly heat the evaporator, and make the moisture attached to the outer wall of the tubes gradually evaporate and be discharged.

[0020] Step 2

[0021] After the dry hot compressed air is heated, a large amount of water has been discharged, but a small amount of water still remains on the outer wall of the tube. In order to further ensure the complete discharge of water and restore the vacuum state of the unit, the evaporator must be vacuumed.

[0022] Use a sleeve heater to perform vacuum operation. During the operation, use the silica gel inspection port to observe the color of the color-changing silica gel to determine the residual moisture. Close the steam stop valve (at the steam inlet), close the condensate discharge stop valve (at the condensate discharge port), close the diaphragm valve at the connection unit and the vacuum pump, replace the temperature gauge at the connection unit with a vacuum pressure gauge, add color-changing silica gel tightly wrapped with gauze to the silica gel inspection port, first evacuate the device to a vacuum state, then open the valves at the connection unit and the vacuum pump, and continue to evacuate. During the operation, close the valves at the connection unit and the vacuum pump every 2-4 hours, open the color-changing silica gel port, extract and check the color and replace it in time until the silica gel does not change color. Each time the silica gel is replaced, the device must be evacuated to a vacuum state before opening the valves at the connection unit and the vacuum pump.

[0023] Step 3

[0024] When the unit is initially added with refrigerant, as the amount added increases, the system temperature will gradually decrease, resulting in a slower addition speed. At this time, adding with a jacket heating device will shorten the refrigerant addition time. First, evacuate the device to a vacuum state, then connect the fluorine bottle, and place the fluorine bottle higher than the jacket heating device. Slightly open the steam stop valve, open the condensate discharge valve, open the fluorine bottle to allow liquid fluorine to enter the device, and the steam will heat the refrigerant and increase the pressure (the pressure displayed by the on-site pressure gauge controls the steam valve opening), allowing the refrigerant to quickly enter the unit. When replacing the fluorine bottle, remember to empty it and do not bring air in.

[0025] Compared with the prior art, the beneficial effects of the utility model are:

[0026] The auxiliary device for treating water leakage of the evaporator of the refrigerator is adopted to provide high-temperature compressed air to the evaporator during the inspection and purge stage; during the vacuum stage, it is checked and tested whether the water content of the extracted air exceeds the standard; during the refrigerant addition stage, the refrigerant temperature is increased and the addition time is shortened; the device can meet the inspection and maintenance needs at different time periods. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of the auxiliary device for treating water leakage of the evaporator of a refrigerator according to the utility model;

[0028] Figure 2 It is a schematic diagram of the structure when the utility model is used;

[0029] In the figure: 1. outer shell; 2. inner shell; 3. air inlet; 4. steam inlet; 5. exhaust port; 6. condensate discharge port; 7. silicone inspection port; 8. steam inlet connecting pipe; 9. exhaust port connecting pipe; 10. condensate discharge port connecting pipe; 11. air inlet connecting pipe; 12. equal-diameter connecting pipe; 13. reducing-diameter connecting pipe; 14. pressure gauge. DETAILED DESCRIPTION

[0030] In order to make the purpose and technical solution of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings.

[0031] Example 1

[0032] like Figure 1 As shown, the auxiliary device for handling water leakage of the evaporator of the refrigerator comprises an inner shell 2, an outer shell 1 is arranged outside the inner shell 2, a steam inlet 4 is arranged on the outer shell 1, the inner shell 2 is connected to the air inlet 3 through an equal-diameter connecting pipe 12, and the inner shell 2 is connected to the exhaust port 5 through a reducing connecting pipe 13. A condensate discharge port 6 is arranged on the outer shell 1, and the condensate discharge port 6 is located on the side close to the air inlet 3, and the steam inlet 4 is located on the side close to the exhaust port 5. An exhaust port connecting pipe 9 is connected to the exhaust port 5, and a pressure gauge 14 is arranged on the exhaust port connecting pipe 9. A steam inlet connecting pipe 8 is connected to the steam inlet 4, and a steam inlet valve is arranged on the steam inlet connecting pipe 8. A condensate discharge port connecting pipe 10 is connected to the condensate discharge port 6. A silica gel inspection port 7 is connected to the equal-diameter connecting pipe 12, and an air inlet connecting pipe 11 is connected to the air inlet 3. In order to ensure the overall cleanliness of the facility and reduce secondary pollution, the whole is made of 304 material.

[0033] The auxiliary device for handling water leakage of the evaporator of the refrigerator comprises the following steps when in operation:

[0034] (1) After the initial cleaning of the evaporator, a large amount of pollutants are discharged from the bottom of the tank, but the outer wall of the high-efficiency heat exchange tube has a lot of residual moisture due to the existence of the spun thread, and the distance between the tubes is close, so it is difficult to blow. Use a sleeve heating device to heat the compressed air, and use a large flow of high-temperature compressed air to gradually discharge the moisture on the outside of the tube wall. Install a manual diaphragm valve at the instrument compression inlet (inlet 3) and the dry hot air outlet (exhaust port 5) to facilitate flow control and ensure valve sealing performance to ensure that no leakage occurs. While connecting the compressed air, close the silicone inspection port 7, open the stop valve at the steam inlet 4 pipeline, open the discharge valve at the condensate discharge port connecting pipeline 10, install a field thermometer at the outlet of the heating device, and adjust the opening of the steam valve according to the dry hot air outlet temperature (because the evaporator generally has rubber and plastic insulation, it is recommended that the dry hot air outlet temperature be controlled below 80°C to prevent personnel from being scalded and not to damage the equipment insulation). Introduce dry hot compressed air at the bottom of the evaporator, remove the pipe or valve at the top to discharge the compressed air, maintain a certain air flow, slowly heat the evaporator, and gradually evaporate and discharge the moisture attached to the outer wall of the tube. (2) After the dry hot compressed air is heated, a large amount of moisture has been discharged, but a small amount of moisture still remains on the outer wall of the tube. To further ensure the complete discharge of moisture and restore the vacuum state of the unit, the evaporator must be evacuated. Use a sleeve heater to perform the vacuum operation. During the operation, use the silica gel inspection port to observe the color of the color-changing silica gel to determine the residual moisture. Close the steam stop valve (at the steam inlet), close the condensate discharge stop valve (at the condensate discharge port 6), close the diaphragm valve at the unit and vacuum pump, replace the temperature gauge at the unit with a vacuum pressure gauge, add color-changing silica gel tightly wrapped with gauze to the silica gel inspection port, first evacuate the device to a vacuum state, then open the valves at the unit and vacuum pump, and continue to evacuate. During the operation, close the valves at the vacuum pump and the unit every 2-4 hours, open the color-changing silica gel port, extract and check the color and replace it in time until the silica gel does not change color. Each time the silica gel is replaced, the device must be evacuated to a vacuum state before opening the valves at the unit and vacuum pump. (3) When the unit is initially added with refrigerant, as the amount added increases, the system temperature will gradually decrease, resulting in a slower addition speed. At this time, adding with a jacket heating device will shorten the refrigerant addition time. First, evacuate the device to a vacuum state, then connect the fluorine bottle, and place the fluorine bottle higher than the jacket heating device, slightly open the steam stop valve, open the condensate discharge valve, open the fluorine bottle to allow liquid fluorine to enter the device, and the steam will heat the refrigerant and increase the pressure (the pressure displayed by the on-site pressure gauge controls the steam valve opening), allowing the refrigerant to quickly enter the unit. When replacing the fluorine bottle, remember to empty it and do not bring in air.

Claims

1. An auxiliary device for treating water leakage in a refrigerator evaporator, characterized in that: The invention comprises an inner shell (2), an outer shell (1) is arranged outside the inner shell (2), a steam inlet (4) is arranged on the outer shell (1), the inner shell (2) is connected to an air inlet (3) via an equal-diameter connecting pipe (12), and the inner shell (2) is connected to an air outlet (5) via a variable-diameter connecting pipe (13).

2. The auxiliary device for treating water leakage of evaporator of refrigerator according to claim 1, characterized in that: The outer shell (1) is provided with a condensate discharge port (6), which is located on a side close to the air inlet (3), and the steam inlet (4) is located on a side close to the exhaust port (5).

3. The auxiliary device for treating water leakage of evaporator of refrigerator according to claim 1, characterized in that: The exhaust port (5) is connected to an exhaust port connecting pipe (9), and a pressure gauge (14) is provided on the exhaust port connecting pipe (9).

4. The auxiliary device for treating water leakage of a refrigerator evaporator according to claim 1, characterized in that: The steam inlet (4) is connected to a steam inlet connecting pipe (8), and a steam inlet connecting pipe (8) is provided with a steam inlet valve.

5. The auxiliary device for treating water leakage of evaporator of refrigerator according to claim 2, characterized in that: The condensate discharge port (6) is connected to a condensate discharge port connecting pipe (10).

6. The auxiliary device for treating water leakage of a refrigerator evaporator according to claim 1, characterized in that: The equal-diameter connecting pipe (12) is connected to a silica gel inspection port (7), and the air inlet (3) is connected to an air inlet connecting pipe (11).

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