Connecting pipe of refrigerant connecting pipeline of indoor unit and outdoor unit of air conditioner

Abstract

The invention relates to a connecting pipe of a refrigerant connecting pipeline of an indoor unit and an outdoor unit of an air conditioner. The connecting pipe comprises a joint on the indoor unit and the outdoor unit and connected with the connecting pipe. The connecting pipe is characterized in that the refrigerant connecting pipeline is an aluminum pipe. Two pipe ends of the aluminum pipe are provided with external screw threads. The external screw threads at the pipe ends are formed by sleeving sleeves at the connecting pipe ends with the external screw threads on the two pipe ends. The external screw threads at the connecting pipe ends are connected and communicated with the joint through a stainless steel sleeve with an internal screw thread in the pipe. The stainless steel sleeve is the sleeve with two internal screw thread specifications. The spiral directions of the internal screw threads of the stainless steel sleeve are positive and negative. The connecting pipe of the refrigerant connecting pipeline of the indoor unit and the outdoor unit of the air conditioner provided by the invention has the characteristics of low production cost, convenience and reliability in connection and high connecting performance.

Description

technical field [0001] The present invention only relates to a refrigerant connecting pipeline of an air conditioner, in particular to a split-type air conditioner which only relates to a refrigerant connecting pipeline between an indoor unit and an outdoor unit. Background technique [0002] Currently known split-type air conditioners use two refrigerant connecting pipes to connect the joints on the indoor unit and the outdoor unit to form a circulation circuit. The joints in this manual are the refrigerant input and output ports of the indoor unit and the outdoor unit. Pipe ends with external thread for connection to connecting pipes. In the prior art, the two refrigerant connecting pipes used to connect the indoor and outdoor units are generally copper pipes. In recent years, copper-aluminum welded pipes, steel pipes, copper-aluminum composite pipes or aluminum pipes have also been used as the connecting pipes of indoor and outdoor units. But no matter what kind of metal...

AI Technical Summary

Problems solved by technology

This brings about such a problem: the outer diameters of the aluminum alloy refrigerant connecting pipe and the joint are different, usually the outer diameter of the aluminum alloy refrigerant connecting pipe is smaller than the outer diameter of the joint, and the joint is a known public technology. The outer diameter cannot be changed. In order to connect the aluminum alloy refrigerant connecting pipe and the joint through a stainless steel casing with an internal thread in the pipe, the outer diameter of the aluminum alloy refrigerant connecting pipe must be increased to be the same as the outer diameter of the joint. The size of the stainless steel casing can be connected through. The increase of the outer diameter must increase the wall thickness accordingly, otherwise the strength of the connecting pipe will be affected, which will increase the production cost. At the same time, the outer diameter and wall thickness of the aluminum alloy refrigerant connecting pipe If the above method is not adopted, the stainless steel casing can only be adjusted according to the outer diameter of the aluminum alloy refrigerant connecting pipe and the outer diameter of the joint. Different sizes are made into variable-diameter sleeves to realize the connection and penetration of stainless steel sleeves, but this brings an increase in the production cost of stainless steel sleeves

In addition, this patent also has such a problem: when the patented technical solution is implemented, it is necessary to "evenly coat the threaded pipe section on one end of the aluminum alloy connecting pipe 9 with liquid raw material tape 10, and then screw the stainless steel casing 2 into the Aluminum alloy pipe 9, until the stainless steel casing cannot be rotated, that is, the aluminum alloy connecting pipe is completely rotated into the stainless steel casing...The stainless steel casing 2 is withdrawn and the aluminum alloy pipe 9 is rotated until the stop valve is connected to the thread of the pipe 1. Fully rotated into the stainless steel casing 2", the liquid raw material belt 10 is what is commonly referred to as metal anaerobic adhesive

Air-conditioning and refrigeration systems have higher requirements on the cleanliness of impurities in the pipes, especially for new refrigerant systems such as R410A, which have higher requirements on the cleanliness of impurities in the pipes. If metal anaerobic adhesives are mixed in, it will affect the normal operation of the air conditioner, and in severe cases will cause air conditioner not working

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