A central air conditioner external fixed connection assembly

Abstract

The utility model discloses a central air-conditioning external fixed connection component, including a connection sleeve located between two butted copper pipe ports, a fastening sleeve is provided on the sleeve opening side corresponding to the connection sleeve, and inner ring grooves are symmetrically provided on both sides of the center line of the connection sleeve, and the inner ring grooves are arranged in an annular manner on the inner side wall of the connection sleeve, and a tin injection hole for connecting the inner ring groove is provided on the outer side wall of the connection sleeve. A solder gun is used to inject melted liquid tin, and after the liquid tin is injected into the inner ring groove, it is filled along the inner ring groove to fill the inner ring groove, which is used to improve the sealing performance. The disadvantage is that the solder position connection is not very stable, so the sleeve opening side corresponding to the connection sleeve is provided with a fastening sleeve, which is used to reinforce the connection stability with the copper pipe. When the copper pipe is installed, it is necessary to overcome the deformation stress caused by the direction of the copper pipe. The reinforcement effect of the fastening sleeve can ensure the stability of the solder position connection and the sealing performance, and the solder is not affected by aging.

Description

Technical Field

[0001] The utility model belongs to the technical field of air-conditioning installation equipment, in particular to an external fixed connection component of a central air-conditioning. Background Art

[0002] Commercial central air conditioners have various indoor extensions. Two coolant pipes are installed between each extension and the main outdoor unit to circulate coolant and achieve heat conversion. The distances between each extension and the outdoor unit are different, so the pipe length may be insufficient and multiple pipes need to be connected and assembled. Especially for central air conditioning systems, the range of cooling that needs to be provided is large and there are many pipes, so multiple pipes must be connected.

[0003] The coolant pipe is a metal copper pipe with good thermal insulation and must be sealed. The joints of the copper pipes are butt-jointed by welding to ensure the sealing of the joints. However, oxygen welding can easily block the inner hole of the copper pipe, causing the coolant to flow poorly or even block. When installing the copper pipe, it is necessary to overcome the toughness between the metals, which will generate huge torque on the weld, and it is easy to cause the weld to fall off. The existing connector is a sleeve structure, and the butt end of the copper pipe and the sleeve are sealed with a rubber sheath. Although welding is not required, the connection is unstable, and the rubber is easily aged by wind, sun, and coolant, resulting in poor sealing. In the case of years of disrepair, it is very difficult to repair.

[0004] Therefore, the utility model is improved on the basis of the existing connector, and a tightening stabilization device and welding technology are added to ensure the stability and sealing of the air conditioner coolant pipe docking. Utility Model Content

[0005] The utility model aims to provide a central air conditioner external fixed connection assembly, which is improved on the basis of existing connectors, and at the same time, a tightening stabilization device and welding technology are added to ensure the stability and sealing of the air conditioner coolant pipe docking.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] A central air conditioner external fixed connection assembly, comprising a connection sleeve located between two butted copper pipe ports, wherein the connection sleeve is a pipe sleeve structure, and is used to sleeve the two copper pipe port sides respectively;

[0008] The connecting sleeve is provided with a fastening sleeve on the corresponding sleeve opening side for fastening the copper pipe;

[0009] The connecting sleeve is symmetrically provided with inner ring grooves on both sides of the center line. The inner ring groove is opened on the inner side wall of the connecting sleeve and is arranged in an annular manner. The outer side wall of the connecting sleeve is provided with a tin injection hole for connecting with the inner ring groove.

[0010] Furthermore, a single inner ring groove has two tin injection holes corresponding to the connecting sleeve, and the two tin injection holes are arranged radially of the connecting sleeve.

[0011] Furthermore, the fastening sleeve is a sleeve structure with an internal thread on one side, the connecting sleeve has a corresponding external thread for the sleeve body thread sleeve to be sleeved, the tail of the fastening sleeve is a shrinking sleeve, and the part of the connecting sleeve corresponding to the shrinking sleeve is a tightening plate.

[0012] Furthermore, a limiting portion is provided in the middle of the inner side wall of the connecting sleeve, and the limiting portion and the inner side wall of the connecting sleeve form a limiting step for limiting the plug-in position of the copper tube outlet side.

[0013] Furthermore, the connecting sleeve has a convex ridge in the middle, and the convex ridge is an annular structure and is integrally arranged around the connecting sleeve.

[0014] The utility model has the following beneficial effects: the tin injection hole is a circular structure, and the edge side of the hole is a chamfered outward expansion structure for aligning the solder gun. The solder gun is used to inject melted liquid tin. After the liquid tin is injected into the inner ring groove, it is filled along the inner ring groove to fill the inner ring groove, which is used to improve the sealing. The disadvantage is that the solder position connection is not very stable, so the sleeve mouth side corresponding to the connecting sleeve is provided with a fastening sleeve for reinforcing the connection stability with the copper pipe. When the copper pipe is installed, it is necessary to overcome the deformation stress caused by the direction of the copper pipe. The reinforcing effect of the fastening sleeve can ensure the stability of the solder position connection and the sealing, and the solder is not affected by aging. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments are briefly introduced below.

[0016] Figure 1 : Schematic diagram of the disassembly structure of the utility model.

[0017] Figure 2 : Schematic diagram of the axial section structure of the connecting sleeve of the utility model.

[0018] Figure 3 : Schematic diagram of the installation structure of the utility model.

[0019] In the accompanying drawings, the components represented by the various reference numerals are listed as follows: copper tube 2, connecting sleeve 1, fastening sleeve 3, inner ring groove 11, tin injection hole 12, tightening piece 14, limiting step 13, convex ridge 15. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] like Figure 1-3 Shown: A central air conditioner external fixed connection component includes a connecting sleeve 1 located between the ports of two butted copper tubes 2, the connecting sleeve 1 is a pipe sleeve structure, which is used to sleeve the port sides of the two copper tubes 2 respectively; the connecting sleeve is made of metal, preferably stainless steel.

[0022] A tightening sleeve 3 is provided on the corresponding sleeve opening side of the connecting sleeve 1 for tightening the copper tube 2; it is used to strengthen the connection stability between the connecting sleeve and the copper tube and prevent the problem of disconnection on the interface side caused by the torque generated during installation of the copper tube.

[0023] The connecting sleeve 1 is symmetrically provided with inner ring grooves 11 on both sides of the midline, which are cylindrical ring grooves. The inner ring grooves 11 are opened on the inner side wall of the connecting sleeve 1 in an annular arrangement. The outer side wall of the connecting sleeve 1 is provided with a tin injection hole 12 for connecting to the inner ring groove 11. The tin injection hole is a circular structure, and the edge side of the hole is a chamfered outward expansion structure, which is used to align the solder gun. The solder gun is used to inject melted liquid tin. After the liquid tin is injected into the inner ring groove, it is filled along the inner ring groove to fill the inner ring groove, which is used to improve the sealing. The disadvantage is that the solder position connection is not very stable, so the sleeve side corresponding to the connecting sleeve is provided with a fastening sleeve, which is used to strengthen the connection stability with the copper pipe. When the copper pipe is installed, it is necessary to overcome the deformation stress caused by the direction of the copper pipe. The reinforcement effect of the fastening sleeve can ensure the stability of the solder position connection and the sealing, and the solder is not affected by aging.

[0024] like Figure 1 As shown: a single inner ring groove 11 corresponds to a connecting sleeve 1 with two tin injection holes 12, and the two tin injection holes 12 are arranged radially on the connecting sleeve 1. Both tin injection holes can be used for tin injection. When in use, a single tin injection hole is used to inject tin, and the other tin injection hole is used to guide air to achieve air pressure balance. When injecting tin, a single tin injection hole is used to inject tin until liquid tin obviously flows out of the other tin injection hole, so as to ensure that the inner ring groove is fully tin-injected. The fastening sleeve 3 is a sleeve structure with an internal thread on one side. The connecting sleeve 1 corresponds to an external thread for the sleeve body thread sleeve to be connected. The tail of the fastening sleeve is a shrinking sleeve, and the part of the connecting sleeve 1 corresponding to the shrinking sleeve is a tightening piece 14. In the process of rotating the fastening sleeve, the entire fastening sleeve moves along the length direction of the connecting sleeve, and the shrinking sleeve compresses the tightening piece inward, so that the tightening piece is close to and fixes the copper tube. The tightening piece is a structure of multiple tube segments with arc-shaped inner side walls, and one side is integrally connected to the connecting sleeve.

[0025] like Figure 2 As shown: the middle part of the inner wall of the connecting sleeve 1 has a limiting part, and the limiting part and the inner wall of the connecting sleeve 1 form a limiting step 13, which is used to limit the insertion position of the pipe mouth side of the copper tube 2. The height of the limiting step is the same as the wall thickness of the copper tube, so that the inner diameter of the corresponding limiting part of the connecting sleeve is the same as the diameter of the copper tube. The middle part of the connecting sleeve 1 has a convex ridge 15, which is a ring structure and is integrally arranged around the connecting sleeve 1. It is used for support.

[0026] This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can better understand and utilize the present invention.

Claims

1. A central air conditioner external fixed connection assembly, characterized in that: It comprises a connecting sleeve (1) located between the ports of two butted copper tubes (2), wherein the connecting sleeve (1) is a pipe sleeve structure and is used to sleeve the port sides of the two copper tubes (2) respectively; The connecting sleeve (1) is provided with a fastening sleeve (3) on the corresponding sleeve opening side, which is used to fasten the copper tube (2); The connecting sleeve (1) is symmetrically provided with inner ring grooves (11) on both sides of the center line. The inner ring groove (11) is opened on the inner side wall of the connecting sleeve (1) and is arranged in an annular manner. The outer side wall of the connecting sleeve (1) is provided with a tin injection hole (12) for connecting with the inner ring groove (11).

2. According to claim 1, a central air conditioner external fixed connection assembly is characterized in that: The single inner ring groove (11) corresponds to the connecting sleeve (1) and has two tin injection holes (12), and the two tin injection holes (12) are arranged radially on the connecting sleeve (1).

3. According to claim 1, a central air conditioner external fixed connection assembly is characterized in that: The fastening sleeve (3) is a sleeve structure with an internal thread on one side, the connecting sleeve (1) has a corresponding external thread for the sleeve body thread sleeve to be sleeved, the tail of the fastening sleeve is a shrink sleeve, and the part of the connecting sleeve (1) corresponding to the shrink sleeve is a tightening piece (14).

4. According to claim 1, a central air conditioner external fixed connection assembly is characterized in that: The middle part of the inner side wall of the connecting sleeve (1) is provided with a limiting portion, and the limiting portion and the inner side wall of the connecting sleeve (1) form a limiting step (13) for limiting the insertion position of the pipe opening side of the copper pipe (2).

5. According to claim 1, a central air conditioner external fixed connection assembly is characterized in that: The connecting sleeve (1) has a ridge (15) in the middle, and the ridge (15) is an annular structure and is integrally arranged around the connecting sleeve (1).

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