Method for modifying R22 expansion valve into R23 expansion valve
An expansion valve, R22 technology, applied in the field of thermal expansion valves, can solve problems such as lack of low-temperature expansion valves, and achieve the effect of improving work efficiency and saving costs
Inactive Publication Date: 2013-01-30
ANHUI YIRUI CRYOGENIC ENERGY TECH +1
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Problems solved by technology
[0005] The present invention introduces a method for transforming the R22 expansion valve into an R23 expansion valve, which not only improves the work efficiency, but also saves the cost, and at the same time avoids the dilemma when there is no low-temperature expansion valve in the production and maintenance work
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[0022] Such as figure 1 , 2 As shown, a method for transforming an R22 expansion valve into an R23 expansion valve is characterized in that it specifically includes the following steps:
[0023] (1) Cut off the capillary 3 connecting the expansion valve body 1 and the expansion valve temperature sensor 2 in the original R22 expansion valve, and discharge the original Freon R22 in the capillary 3;
[0024] (2) Insert the two ends of the capillary 3 disconnected in step (1) side by side into one end of a joint 4, and seal welding;
[0025] (3) A new capillary 5 is inserted into the other end of the joint 4, and sealed and welded. The other end of the new capillary 5 is connected to an outlet of the three-way angle valve 6, and a pressure gauge 7 is connected in parallel to the new capillary 5. Three The other outlet of the three-way angle valve 6 is connected to a vacuum pump 8, and the third outlet of the three-way angle valve 6 is connected to the container 9 containing Freo...
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The invention discloses a method for modifying an R22 expansion valve into an R23 expansion valve. The method comprises cutting off a capillary tube of the original R22 expansion valve from the middle, and discharging original freon in the capillary tube; enabling two ends of the broken capillary tube to be inserted into one end of one connector side by side, and performing sealing welding; enabling the other end of the connector to be inserted into a new capillary tube, performing sealing welding, enabling the other end of the new capillary tube to be connected to one outlet of a three-way angle valve, enabling the new capillary tube to be further in parallel connection with a pressure gauge, enabling the other outlet of the three-way angle valve to be connected to a vacuum pump, and enabling a third outlet of the three-way angle valve to be connected with a container containing freon R23; utilizing the vacuum pump to evacuate a temperature-sensing space; filling the freon R23 in the evacuated temperature-sensing space, and adjusting filling pressure of the freon R23 to balance pressure of the freon R23 in a refrigeration system; and utilizing a sealing clamp to clamp the new capillary tube, cutting the capillary tube, and performing welding sealing. According to the method, working efficiency is improved, the cost is also reduced, and the problem that a low-temperature expansion valve is lacked in production and maintenance work is solved simultaneously.
Description
technical field [0001] The invention mainly relates to the field of thermal expansion valves, in particular to a method for transforming an R22 expansion valve into an R23 expansion valve. Background technique [0002] The thermal expansion valve is an important part of the refrigeration device and one of the four basic equipment in the refrigeration system. It achieves a pressure drop from condensing pressure to evaporating pressure while controlling the flow of refrigerant. The thermal expansion valve controls the flow of refrigerant entering the evaporator by sensing the temperature of the gaseous refrigerant at the outlet of the evaporator. [0003] The thermal expansion valve is composed of an induction mechanism, an actuator, an adjustment mechanism and a valve body, and the induction mechanism is filled with Freon working fluid. Working principle: The working medium that drives the opening of the valve is Freon in the space composed of the temperature sensing...
Claims
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IPC IPC(8): F25B41/06
Inventor 马学焕汪韩送
Owner ANHUI YIRUI CRYOGENIC ENERGY TECH