Air-conditioning piping using flexible bellows

Abstract

The invention provides an air conditioner pipe using a flexible corrugated pipe, and aims to solve the problems that when the air conditioner pipe is installed, a stainless steel corrugated pipe can be freely bent, and meanwhile, a straight pipe part provided with a connecting part can bear high pressure. The purpose of the present invention is to provide an air-conditioning pipe using a flexible corrugated pipe, comprising: a stainless steel corrugated pipe; a straight pipe section formed so that connection members can be attached to both ends of the corrugated pipe; the stainless steel corrugated pipe is inserted into the woven mesh; and a fixing ring member for fixing an end portion of the mesh grid to a straight pipe portion or a stainless steel bellows, characterized in that the straight pipe portion is formed by welding a straight pipe member having a thickness greater than that of the stainless steel bellows to a tail end portion of the stainless steel bellows to reinforce the straight pipe portion.

Description

Technical Field

[0001] The present invention relates to a piping for connecting an indoor unit and an outdoor unit of an air conditioner, and more particularly to an air conditioner piping using a flexible bellows that can withstand high pressure by welding a straight pipe portion to the bellows, wherein the straight pipe portion is arranged on both sides of the bellows wrapped with a braided mesh on the outside to prevent the corrugations of the stainless steel bellows from being deformed due to internal pressure. Background Art

[0002] Generally, straight copper pipes of a certain diameter are widely used as pipes for connecting an outdoor unit and an indoor unit of an air conditioner to circulate a refrigerant through an evaporator, a condenser, and a compressor.

[0003] However, it is difficult to bend a copper pipe of a certain diameter to fit the installation location.

[0004] Due to this problem, many solutions have been proposed to use flexible bellows instead of copper pipes of a certain diameter in air conditioning piping. However, since these prior arts are only proposals at the conceptual level and do not provide a method to meet the product characteristics that the high-pressure side piping needs to withstand high pressure, there are no existing products that use flexible bellows for piping connecting indoor and outdoor units.

[0005] The piping of the air conditioner requires a straight pipe structure with a certain diameter and no corrugations at both ends to connect the indoor unit and the outdoor unit.

[0006] In addition, the thickness of the stainless steel bellows is 0.25 to 0.4 mm. If the thickness exceeds 0.4 mm, it is difficult to bend freely on site. This means that when the two ends of the stainless steel bellows form a straight pipe, the thickness is limited to less than 0.4 mm.

[0007] The inventor of the present invention has manufactured a method for preventing the stainless steel bellows from deforming due to internal pressure. Figure 1 In the piping shown, straight pipe portions 2 are formed at both ends of a high-pressure braided stainless steel corrugated pipe 1 wrapped with a steel wire braided mesh 3, and a portion of the straight pipe portion 2 is processed into a trumpet shape to mount a connecting component 4.

[0008] Under the internal pressure conditions required by UL certification Figure 1 The results of the test on the pipe in the pipe show that although the thickness of the stainless steel bellows 1 is selected to be the maximum value of 0.4 mm, the straight pipe part 2 still breaks. Figure 2 As shown in the photos.

[0009] The inventor of the present invention has confirmed through continuous experiments that when the thickness of the straight tube portion 2 is greater than 0.5 mm, the internal pressure conditions required by UL certification can be met. However, in this case, there is a dilemma of having to give up the advantages of the stainless steel bellows 1 .

[0010] The inventors of the present invention have completed the present invention by studying and confirming a solution of increasing the thickness of the straight tube portion 2 to 0.5 mm or more while maintaining the flexibility of the stainless steel corrugated tube 1 .

[0011] Prior art literature

[0012] Patent Document 1: Korean Utility Model Grant Notice No. 20-0266061

[0013] Patent Document 2: Korean Invention Grant Notice No. 10-0269937 Summary of the invention

[0014] Technical problem to be solved by the invention

[0015] The technical problem to be solved by the present invention is to provide an air conditioning piping using a flexible bellows. When the air conditioning piping is installed, the stainless steel bellows can be bent freely, and the straight pipe part where the connecting component is installed can withstand high pressure.

[0016] Technical solutions to solve problems

[0017] The object of the present invention is to provide an air-conditioning piping using a flexible bellows, comprising: a stainless steel bellows; a straight pipe portion, which is formed so that connecting components can be installed at both ends of the bellows; a woven mesh, into which the stainless steel bellows is inserted and installed; a fixing ring component, which is used to fix the end of the woven mesh to the straight pipe portion or the stainless steel bellows, and is characterized in that the straight pipe portion is formed by welding a straight pipe component having a thickness greater than that of the stainless steel bellows to the terminal end of the stainless steel bellows to reinforce the straight pipe portion.

[0018] When the thickness of the stainless steel corrugated tube is 0.25-0.4 mm, the straight tube component is preferably made of a material with a thickness of 0.5-0.7 mm.

[0019] Effects of the Invention

[0020] The present invention uses a straight pipe component having a thickness greater than that of a stainless steel bellows to replace a straight pipe portion that is easily affected by pressure even if reinforced with a braided mesh, thereby maintaining the advantages of being able to bend freely and being easy to install, while providing a straight pipe portion that can withstand high pressure in the stainless steel bellows to commercialize proposals at the level of previous ideas. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a cross-sectional view of the main parts of an air conditioning piping using a stainless steel bellows having a straight pipe portion with no corrugation at the end.

[0022] Figure 2 To display Figure 1 A photo of the ruptured straight pipe section of the air conditioning piping pressure test result.

[0023] Figure 3 It is a three-dimensional view of the air conditioning piping of the present invention.

[0024] Figure 4 This is a cross-sectional view of the main parts of an embodiment of the air conditioning piping of the present invention.

[0025] Figure 5 This is a cross-sectional view of the main parts of another embodiment of the air conditioning piping of the present invention.

[0026] Figure 6 This is a diagram showing a state where an indoor unit and an outdoor unit are connected using the piping of the present invention.

[0027] Reference numerals

[0028] 10: Bellows 20: Straight pipe parts

[0029] 30: Braided mesh 40: Fixed ring parts

[0030] 50: Connecting parts DETAILED DESCRIPTION

[0031] Specific embodiments will be described in detail below with reference to the accompanying drawings.

[0032] like Figures 3 to 5 As shown, the present invention relates to an air conditioning piping using a flexible bellows, comprising: a stainless steel bellows 10; a straight pipe portion, which is formed so that connecting components 50 can be installed at both ends of the bellows 10; a woven mesh 30, into which the stainless steel bellows 10 is inserted and installed; a fixing ring component 40, which is used to fix the end of the woven mesh 30 to the straight pipe portion or the stainless steel bellows 10, and the straight pipe portion is formed by welding a straight pipe component 20 having a thickness greater than that of the stainless steel bellows 10 to the terminal portion of the stainless steel bellows 10 to reinforce the straight pipe portion.

[0033] Figure 3 This is a diagram showing a state where the air conditioning pipe and electric wire 81 of the present invention are wrapped with a heat insulating material 82.

[0034] Since the coupling parts (screws or screw holes) of the connection member 50 for connecting the indoor unit and the outdoor unit are standardized, the diameters of the corrugated pipe 10 and the straight pipe member 20 constituting the piping of the present invention are also limited accordingly.

[0035] The braided mesh 30 in which the corrugated tube 10 is inserted and wrapped is made by braiding steel wires into a fabric shape. Figure 4 As shown, the end portion of the braided mesh 30 is fixed to the straight tube component 20 by a fixing ring component 40, or as shown in Figure 5As shown, it is fixed to the stainless steel bellows 10 together with the fixing ring member 40, and plays a role in preventing the bellows 10 from deforming even when a high pressure is applied.

[0036] The straight pipe member 20 is formed with a curved portion 22, and is fixedly mounted to the corrugated pipe 10 by welding to ensure that the inserted connecting member 50 does not fall off. The curved portion 22 may be formed in a trumpet shape, such as Figure 4 or Figure 5 shown.

[0037] The connection member 50 is connected to pipes of the indoor unit 60 and the outdoor unit 70 .

[0038] Preferably, the thickness of the stainless steel corrugated tube 10 is selected to be 0.25-0.4 mm, and the thickness of the straight tube component 20 is selected to be 0.5-0.7 mm.

[0039] If the thickness of the stainless steel bellows 10 is less than 0.25 mm, when the high pressure required for air conditioning piping is applied, the corrugated part of the bellows 10 may break even if it is reinforced with the braided mesh 30. If it exceeds 0.4 mm, excessive force may be required to bend it on site.

[0040] If the thickness of the straight tube member 20 is less than 0.5 mm, Figure 2 The straight pipe member 20 replacing the straight pipe portion is broken under the UL certification test conditions. If the straight pipe member 20 is broken over 0.7 mm, it will be difficult to operate without damaging the flange portion 21.

[0041] Figure 4 An embodiment of the air conditioning pipe in which the braided mesh 30 is fixedly mounted to the straight pipe member 20 via the fixing ring member 40 is shown.

[0042] Reference Figure 4 The two-layer close-fitting surface 11 which flattens one corrugation is formed by cutting the valley of the corrugated tube 10, and the peak of the corrugated tube 10 and the flange 21 are TIG welded (TIG welding, Tungsten Inert Gas Welding) in a state where the close-fitting surface 11 is in contact with the flange 21 of the straight pipe member 20. Preferably, the TIG welding portion W has a natural and continuous appearance of the corrugated shape of the corrugated tube 10. Since the corrugated tube 10 is formed into two layers in the close-fitting surface 11 and its thickness is doubled, it is convenient for TIG welding.

[0043] Figure 5 Another embodiment of the air conditioning pipe is shown in which the braided mesh 30 is fixedly mounted to the corrugated tube 10 via the fixing ring member 40 .

[0044] Reference Figure 5The first TIG welding is performed on the end portions of the corrugated tube 10, the fixing ring member 40, and the braided mesh 30, and the second TIG welding is performed on the straight tube member 20 at the first TIG welding portion. In this case, the flange portion 21 does not need to be formed in the straight tube member 20.

[0045] The following is an embodiment of the present invention. Figure 4 The manufacturing procedure of the air conditioning piping shown is described below.

[0046] The high-pressure stainless steel corrugated pipe 10 wrapped with a known braided mesh 30 is cut into a certain length to form a close contact surface 11 in which one corrugation is flattened. TIG welding is performed in a state where the close contact surface 11 is in contact with the flange portion 21 of the straight pipe member 20, and then the braided mesh 30 is fixed to the straight pipe member 20 using a fixing ring member 40. The air conditioning piping of the present invention is completed by forming the bent portion 22 in a state where the connecting member 50 is inserted into the straight pipe member 20.

[0047] As another embodiment of the present invention Figure 5 The manufacturing procedure of the air conditioning piping shown is as follows.

[0048] The high-pressure stainless steel bellows 10 wrapped by the braided mesh 30 is cut into a certain length, and the fixing ring component 40 is TIG-welded to the braided mesh 30 and the end portion of the bellows 10 for the first time, and then the straight pipe component 20 is TIG-welded to the first welding portion for the second time. The air conditioning piping of the present invention is completed by forming the curved portion 22 in a state where the connecting component 50 is inserted into the straight pipe component 20.

[0049] In this way, the air conditioning piping of the present invention can maintain the unique flexibility of the corrugated pipe that can be freely bent at the air conditioning installation site, while strengthening the rigidity of the straight pipe component 20 to meet the UL certification conditions of the air conditioning piping, thereby realizing the productization of air conditioning piping using flexible corrugated pipes at the ideal level.

[0050] In the above, the present invention is described with reference to the accompanying drawings, but the present invention is not limited thereto, and various modifications can be made without departing from the technical idea of ​​the present invention.

Claims

1. An air conditioning piping using a flexible corrugated pipe, comprising: A stainless steel bellows; a straight pipe portion formed so that connecting components can be installed at both ends of the bellows; a braided mesh into which the stainless steel bellows is inserted and installed; The fixing ring component is used to fix the end of the braided mesh to the straight pipe portion, characterized in that: The straight pipe portion is formed by welding a straight pipe member having a thickness greater than that of the stainless steel bellows to a terminal end portion of the stainless steel bellows to reinforce the straight pipe portion.

2. The air conditioning piping using the flexible corrugated pipe according to claim 1, characterized in that: The thickness of the stainless steel corrugated pipe is 0.25-0.4 mm, and the thickness of the straight pipe part is 0.5-0.7 mm.

3. The air conditioning piping using the flexible corrugated pipe according to claim 1 or 2, characterized in that: The air conditioning piping using the flexible bellows is formed by cutting the valley of the bellows to form a two-layer close-fitting surface by flattening a corrugation, and TIG welding is performed on the peak and flange of the bellows while the close-fitting surface is in contact with the flange of the straight pipe component.

4. An air conditioning piping using a flexible corrugated pipe, comprising: A stainless steel bellows; a straight pipe portion formed so that connecting components can be installed at both ends of the bellows; a braided mesh into which the stainless steel bellows is inserted and installed; A fixing ring component, used to fix the end of the braided mesh to the stainless steel bellows, characterized in that: The straight pipe portion is formed by welding a straight pipe member having a thickness greater than that of the stainless steel bellows to a terminal end portion of the stainless steel bellows to reinforce the straight pipe portion.

5. The air conditioning piping using the flexible corrugated pipe according to claim 4, characterized in that: The thickness of the stainless steel corrugated pipe is 0.25-0.4 mm, and the thickness of the straight pipe part is 0.5-0.7 mm.

6. The air conditioning piping using the flexible corrugated pipe according to claim 4 or 5, characterized in that: The air conditioning piping using the flexible corrugated pipe is formed by performing a first TIG welding on the end portions of the corrugated pipe, the fixing ring component, and the braided mesh, and performing a second TIG welding on the straight pipe component at the first TIG welding portion.

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