WO2022222549A1

WO2022222549A1 - Air conditioner pipe fitting, air conditioner pipeline, and air conditioner

Info

Publication number: WO2022222549A1
Application number: PCT/CN2022/070171
Authority: WO
Inventors: 任常宝; 李洋; 张铁钢; 崔渊博; 王命仁
Original assignee: 广东美的暖通设备有限公司; 合肥美的暖通设备有限公司
Priority date: 2021-04-21
Filing date: 2022-01-04
Publication date: 2022-10-27
Also published as: CN113236879A; CN113236879B

Abstract

An air conditioner pipe fitting (100), an air conditioner pipeline, and an air conditioner, the air conditioner pipe fitting (100) comprising: a steel pipe (110), the steel pipe (110) comprising a first end part (111) and a second end part; and a copper pipe (130), the copper pipe (130) being connected to the first end part (111), a liquid storage tank (140) being formed between the copper pipe (130) and the first end part (111) or a liquid storage tank (140) being formed in the copper pipe (130), and an opening of the liquid storage tank (140) facing in the direction away from the second end part of the steel pipe (110).

Description

Air conditioning pipe fittings, air conditioning pipes and air conditioners

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on the Chinese patent application with the application number of 202110430510.2 and the filing date of April 21, 2021, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is incorporated herein by reference.

technical field

The present disclosure relates to the technical field of air-conditioning manufacturing, in particular to an air-conditioning pipe fitting, an air-conditioning pipeline and an air conditioner having the air-conditioning pipeline.

Background technique

At present, pipe fittings are needed to transmit refrigerant in air-conditioning systems. Copper pipes are commonly used in the industry, but the price of copper materials is relatively high. Compared with copper pipes, steel pipes have low cost, high pressure resistance, low thermal conductivity, and thermal insulation. The coefficient is higher than that of copper pipes, and the application of steel pipes in air conditioning systems can improve the energy efficiency of air conditioning systems. However, the existing flame brazing solder does not stick to the steel pipeline, and only silver-containing solder can be used for the flame welding between the steel material and the steel material. The cost of this kind of solder is too high and is not suitable for commercialization.

SUMMARY OF THE INVENTION

The present disclosure aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present disclosure proposes an air conditioning pipe fitting. Embodiments of the present disclosure also provide an air-conditioning pipe having the above-mentioned air-conditioning pipe, and an air conditioner having such an air-conditioning pipe.

An air conditioning pipe fitting according to an embodiment of the present disclosure includes: a steel pipe, the steel pipe includes a first end and a second end; a copper pipe, the copper pipe is connected to the first end, and the copper pipe is connected to the A liquid storage tank is formed between the first ends or a liquid storage tank is formed in the copper pipe, and the opening of the liquid storage tank faces a direction away from the second end of the steel pipe.

The air-conditioning pipe fitting provided according to the embodiment of the present disclosure has a liquid storage tank for receiving the excess solder from the welding of the copper pipe and the connecting pipe. The steel pipe in the air-conditioning pipe fitting provided by the embodiment of the present disclosure is not directly connected with the connecting pipe (other pipelines), but is connected with a copper pipe at the joint of the steel pipe, and the connecting pipe extends into the copper pipe and is connected with the copper pipe, so the steel pipe Finally, the interconnection with the connecting pipe is realized. The welding process of the connecting pipe and the copper pipe is the same as the welding process of the traditional copper pipe-copper pipe welding seam, which is easy to realize and reduces the welding difficulty of the air-conditioning pipe fittings and the connecting pipe. In the process of welding the copper pipe and the connecting pipe, the solder first flows between the connecting pipe and the copper pipe, and the excess solder will flow into the liquid storage tank and condense, so that the excess solder will not penetrate and flow along the steel pipe. The system forms a weld flash, causing damage to the system.

Therefore, the air-conditioning pipe fitting provided by the embodiments of the present disclosure has the advantages of low welding difficulty, good reliability, low leakage risk, and low fracture risk.

An air conditioning pipeline provided according to another aspect of the present disclosure includes the air conditioning pipe fitting and a connecting pipe provided according to any one of the above embodiments of the present disclosure, one end of the connecting pipe extends into the copper pipe and is connected to the copper pipe. The copper pipe is welded, and the liquid storage tank is used for receiving the solder for welding the copper pipe and the connecting pipe.

An air conditioner provided according to another aspect of the present disclosure includes the air conditioning pipeline provided according to any one of the above embodiments of the present disclosure.

Additional aspects and advantages of the present disclosure will be set forth, in part, from the following description, and in part will become apparent from the following description, or may be learned by practice of the present disclosure.

Description of drawings

FIG. 1 is a first embodiment of an air-conditioning pipe fitting in the related art.

FIG. 2 is a second embodiment of an air-conditioning pipe fitting in the related art.

FIG. 3 is a third embodiment of an air-conditioning pipe fitting in the related art.

FIG. 4 is a schematic structural diagram of an air-conditioning pipe fitting in Embodiment 1 of the present disclosure.

FIG. 5 is a schematic structural diagram of an air conditioning pipeline in Embodiment 1 of the present disclosure.

FIG. 6 is another schematic structural diagram of the air-conditioning pipe fitting in Embodiment 1 of the present disclosure.

FIG. 7 is a schematic structural diagram of an air-conditioning pipe fitting in Embodiment 2 of the present disclosure.

FIG. 8 is a schematic structural diagram of an air conditioning pipeline in Embodiment 2 of the present disclosure.

FIG. 9 is a schematic structural diagram of an air-conditioning pipe fitting in Embodiment 3 of the present disclosure.

FIG. 10 is a schematic structural diagram of an air conditioning pipeline in Embodiment 3 of the present disclosure.

FIG. 11 is a schematic structural diagram of an air-conditioning pipe fitting in Embodiment 4 of the present disclosure.

Detailed ways

Embodiments of the present disclosure are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present disclosure and should not be construed as a limitation of the present disclosure.

The present disclosure is made based on the inventors' findings and knowledge of the following facts and problems:

In order to solve the technical problems in the prior art, as shown in FIGS. 1 to 3 , the related art generally adds copper sleeves at the steel pipe joints, the first steel pipe 001 is connected to the first copper sleeve 002 , and the second steel pipe 003 is connected to the second copper sleeve 004 , the first copper sleeve 002 is connected with the second copper sleeve 004, so that the first steel pipe 001 and the second steel pipe 004 can be connected, but the air-conditioning pipe fittings in the related art often have the following problems:

The existing flame brazing solder does not stick to the steel pipe. In the welding stage, although a copper sleeve is added to the steel pipe joint, the heat dissipation effect of the steel pipe is slower than that of the copper pipe due to the low thermal conductivity of the steel pipe. When the temperature at the junction of the copper sleeve and the steel pipe is high, the excess solder 005 is not easy to solidify, the permeable position is too long, and it is difficult to adhere to the inner wall of the steel pipe, and it is easy to flow into the system along the steel pipe wall, causing damage to the system. .

According to some embodiments of the present application, an air conditioning pipe is provided. The air conditioning pipe 100 of the embodiment of the present disclosure will be described below with reference to FIGS. 4 to 11 . The air-conditioning pipe fitting 100 includes a steel pipe 110 and a copper pipe 130 .

The steel pipe 110 includes a first end portion 111 and a second end portion (not shown in the figures). It can be understood that the first end portion 111 of the steel pipe 110 is opposite to the second end portion of the steel pipe 110 in the extending direction of the steel pipe 110 .

The copper pipe 130 is connected to the first end 111 of the steel pipe 110 , and a liquid storage tank 140 is formed between the copper pipe 130 and the first end 111 of the steel pipe 110 , or a liquid storage tank 140 is formed in the copper pipe 130 . That is to say, the liquid storage tank 140 may be constructed by the copper pipe 130 and the first end 111 of the steel pipe 110 together, or may be constructed by the copper pipe 130 by itself. For example, the copper pipe 130 is sleeved on the first end portion 111 of the steel pipe 110 , and there is a certain interval between the inner peripheral surface of the copper pipe 130 and the outer peripheral surface of the first end portion 111 of the steel pipe 110 to define the liquid storage tank 140 . When the liquid storage tank 140 is constructed by the copper pipe 130 , the liquid storage tank 140 is located inside the copper pipe 130 . And the opening of the liquid storage tank 140 faces a direction away from the second end of the steel pipe 110 in the extending direction of the steel pipe 120 .

The inner wall of the copper pipe 130 is used for welding with other pipelines of the air conditioner, such as the connecting pipe 120 , and the liquid storage tank 140 is used for receiving the solder for welding the copper pipe 130 and the connecting pipe 120 .

For example, the connecting pipe 120 has a fourth end portion 121 . The fourth end 121 of the connecting pipe 120 is used to extend into the copper pipe 130 and be welded with the inner wall of the copper pipe 130 . At least a part of the fourth end 121 of the connection pipe 120 is located in the liquid storage tank 140 . That is to say, the copper pipe 130 is sleeved on the fourth end 121 of the connecting pipe 120, and at least a part of the fourth end 121 of the connecting pipe 120 extends into the liquid storage tank 140 from the opening of the liquid storage tank 140, and is connected to The distal end (free end) of the fourth end 121 of the tube 120 is located in the reservoir 140 . It can be understood that the opening of the liquid storage tank 140 is oriented opposite to the extending direction of the connecting pipe 120, and the liquid storage tank 140 is facing the fourth end 121 of the connecting pipe 120 so that the fourth end 121 of the connecting pipe 120 can pass from the storage tank 120. The opening of the liquid tank 140 extends into the liquid storage tank 140 . Alternatively, the fourth end 121 of the connecting pipe 120 may also be located above the liquid storage tank 140 , that is, the fourth end 121 of the connecting pipe 120 does not actually extend into the liquid storage tank 140 . Preferably, at least a portion of the fourth end 121 of the connecting tube 120 is located in the liquid storage tank 140 .

The fourth end 121 of the connecting pipe 120 is a copper pipe section. The fourth end 121 of the connecting pipe 120 is connected to the copper pipe 130 by welding, and a part of the solder 200 used for welding is filled between the fourth end 121 of the connecting pipe 120 and the copper pipe 130 in the radial direction of the copper pipe 130 , so that The fourth end 121 of the connection pipe 121 is connected to the copper pipe 130 , and the rest of the solder 200 is filled in the liquid storage tank 140 . Here, the solder 200 located between the fourth end 121 of the connecting pipe 120 and the copper pipe 130 plays the role of actual connection, and its length in the extending direction of the fourth end 121 of the connecting pipe 120 is the “soldering depth”. The rest of the solder 200 is the surplus solder 200 produced when the fourth end 121 of the connecting pipe 120 and the copper pipe 130 are welded, and the surplus solder 200 eventually flows into the liquid storage tank 140 instead of along the steel pipe 110 Continue to penetrate inside the fitting. Thus, the connection pipe 120 and the steel pipe 110 are connected to each other through the copper pipe 130 . Wherein, the connecting pipe 120 may be a copper pipe or a steel pipe connected with a copper pipe.

When manufacturing the air-conditioning pipe fitting provided by the embodiment of the present disclosure, the copper pipe 130 and the steel pipe 110 may be pre-welded, that is, the copper pipe 130 may be welded to the first end 111 of the steel pipe 110 first, and only a flame needs to be used on site. Solder the copper tube 130 and the fourth end 121 of the connection tube 120 .

In addition, in the process of extending the connecting pipe into the copper sleeve, the bottom of the liquid storage tank can limit the extending depth of the connecting pipe, so as to effectively control the welding depth of the connecting pipe and keep the welding depth of the connecting pipe within a reasonable range , reduce the leakage risk of the liquid agent in the pipeline. In addition, the condensed solder in the liquid storage tank forms double contact with the part of the connecting pipe extending into the liquid storage tank, which improves the connection reliability of the connecting pipe and the copper pipe, and also effectively reduces the risk of pipeline breakage.

In some embodiments, the reservoir 140 is annular.

In some embodiments, the radial directions of the first end 111 of the steel pipe 110 , the fourth end 121 of the connecting pipe 120 and the copper pipe 130 are the same as each other. The axial directions of the first end portion 111 of the steel pipe 110 , the fourth end portion 121 of the connecting pipe 120 , and the copper pipe 130 are also the same as each other.

For convenience of expression, the technical solution of the present disclosure is described below by taking the first end 111 of the steel pipe 110 , the fourth end 121 of the connecting pipe 120 and the extending direction of the copper pipe 130 in the left-right direction as an example, as shown in FIG. 4 . , the first end 111 of the steel pipe 110 is the right end of the steel pipe 110 , the fourth end 121 of the connecting pipe 120 is the left end of the connecting pipe 120 , the opening direction of the liquid storage tank 140 is to the right, and the fourth end of the connecting pipe 120 The portion 121 extends into the reservoir 140 from right to left. Several embodiments provided by the present disclosure will be described in detail below by taking FIGS. 4 to 11 as examples.

Example 1:

The following describes the air-conditioning pipe fittings provided by the embodiments of the present disclosure by taking FIGS. 4 to 6 as examples. As shown in FIG. 4 , the third end portion 131 of the copper pipe 130 is sleeved on the first end portion 111 of the steel pipe 110 , and a part of the first end portion 111 of the steel pipe 110 is formed with a first constriction structure. The mouth structure includes a first transition section 113 and a first neck section 114 that are connected. The first transition section 113 is used to connect the first neck section 114 with the rest of the first end 111 of the steel pipe 110 . The remainder of the first end 111 of the steel tube 110 may be referred to as the connecting segment 112 . That is to say, the first end portion 111 of the steel pipe 110 includes the connecting section 112 , the first transition section 113 and the first neck section 114 which are connected in sequence in the extending direction (left and right direction). The connecting section 112 is also used to connect with the rest of the steel pipe 110 .

As an example, as shown in FIG. 4 , the connecting section 112 , the first transition section 113 and the first neck section 114 are arranged in order from left to right and connected in sequence to form the first end 111 of the steel pipe 110 . The third end portion 131 is sleeved on the first end portion 111 of the steel pipe 110 . The connecting section 112 is connected to the copper pipe 130 . As shown in FIG. 4 , the copper pipe 130 is a straight pipe, the diameter of the first constricted section 114 is smaller than the diameter of the connecting section 112 , and a reservoir is formed between the outer peripheral surface of the first constricted section 114 and the inner peripheral surface of the copper pipe 130 . Tank 140. Here, the inner peripheral surface of the copper tube 130 is the inner peripheral surface of the portion opposite to the first neck section 114 in the radial direction.

As shown in FIG. 4 , the opening of the liquid storage tank 140 faces to the right, and the first transition section 113 is the bottom of the liquid storage tank 140 . The length of the first constriction section 114 is the height h of the liquid storage tank 140 , and the distance between the outer peripheral surface of the first constricted section 114 and the inner peripheral surface of the copper tube 130 in the radial direction of the copper tube 130 is the distance of the liquid storage tank 140 . Slot width w. The depth direction of the liquid storage tank 140 is consistent with the axial direction of the copper pipe 130 , that is, along the left-right direction.

Optionally, the value range of the groove height h is 3mm-5mm. In the embodiment shown in FIG. 4 , the copper pipe 130 is partially sleeved on the steel pipe 110. It can be understood that in other embodiments, the copper pipe 130 can be completely sleeved on the steel pipe 110, and the first constriction section The right end surface of 114 and the right end surface of the copper pipe 130 may be flush.

Optionally, the wall thickness of the connecting pipe 120 is a mm, and the groove width w is greater than or equal to (a+0.5) mm.

Optionally, the length of the connecting section 112 is 3mm-10mm.

As shown in FIG. 5 , when the air conditioning pipe provided in this embodiment is connected to the connecting pipe 120 , the fourth end 121 of the connecting pipe 120 extends into the copper pipe 130 from right to left until the fourth end of the connecting pipe 120 A portion of 121 protrudes into reservoir 140 . This part of the fourth end 121 of the connecting tube 120 is located between the copper tube 130 and the first neck section 114 in the radial direction of the copper tube 130 , and radially coincides with the copper tube 130 and the first neck section 114 .

Further, the first transition section 113 has a certain length in the left-right direction, and there is an included angle between the first transition section 113 and the left-right direction, the diameter of the left end of the first transition section 113 is larger than the diameter of the right end, and the first transition section 113 The diameter of the segment 113 gradually decreases inward from left to right. This arrangement is to reduce the influence of stress concentration on the structural strength of the steel pipe 110 and ensure the structural strength of the steel pipe 110 . Optionally, the length of the first transition section 113 in the left-right direction is greater than or equal to 2 mm and less than or equal to 5 mm. Alternatively, in other embodiments, the first transition section 113 may also extend along the radial direction of the first end portion 111 of the steel pipe 110 , that is, perpendicular to the left-right direction.

As shown in FIG. 5 , there is a weld between the fourth end 121 of the connecting pipe 120 and the copper pipe 130 in the radial direction of the copper pipe 130 . Between the fourth end portion 121 and the copper pipe 130 , the fourth end portion 121 of the connection pipe 121 and the copper pipe 130 are connected. During welding, the solder 200 penetrates into the weld from the right end of the weld, and the unsolidified solder 200 flows to the left along the weld until the weld is completely filled, and then the excess solder 200 flows into the left side of the weld. The liquid storage tank 140 is stored and solidified in the liquid storage tank 140, thereby preventing the excess solder 200 from continuing to penetrate into the steel pipe 110 along the steel pipe 110, thereby causing damage to the system.

In addition, the first transition section 113 may position the connecting tube 120 to keep the welding depth of the connecting tube 120 within a reasonable range. The part of the fourth end 121 of the connecting pipe 120 located in the liquid storage tank 140 forms double contact with the solder 200 in the liquid storage tank 140, that is, the inner and outer peripheral surfaces of the part are in contact with the solder 200, and the connecting pipe The end (left end) of the fourth end 121 of the 120 is buried in the solder 200 , thereby improving the connection reliability of the connecting pipe 120 and the copper pipe 130 , and effectively reducing the risk of pipe breakage.

Alternatively, the steel pipe 110 may be a carbon steel pipe or a stainless steel pipe.

The first end 111 of the steel pipe 110 may also not include the first constricted section 114 , as shown in FIG. It can be understood that the bending section 115 is equivalent to the first transition section 113 in FIG. 4 , and the diameter of the bending section 115 gradually decreases inward from left to right. The bending section 115 has a certain length in the left-right direction, and an angle θ is formed between the bending section 115 and the left-right direction. Optionally, θ is greater than or equal to 30° and less than or equal to 90°.

A liquid storage tank 140 is formed between the outer peripheral surface of the bending section 115 and the inner peripheral surface of the copper tube 130 . As shown in FIG. 6 , the length of the bending section 115 in the left-right direction is the groove height h of the liquid storage tank 140 . Optionally, the groove height h is greater than or equal to 3 mm and less than or equal to 5 mm. Further optionally, the diameter of the right end of the bending section 115 is L, the fourth end 121 of the connecting pipe 120 is a branch pipe section, the diameter of the fourth end 121 of the connecting pipe 120 is b mm, and L is less than or equal to [b- 2*(a+0.5)]mm.

Embodiment 2:

The air-conditioning pipe fitting provided in this embodiment is described below by taking FIG. 7 and FIG. 8 as examples. As shown in FIGS. 7 and 8 , the third end 131 of the copper pipe 130 is sleeved on the first end 111 of the steel pipe 110 , and the first end 111 of the steel pipe 110 is a straight pipe. A portion of the third end portion 131 of the copper tube 130 forms a second constriction structure, and the second constriction structure includes a second constriction section 132 and a second transition section 133 . In this embodiment, the third end 131 of the copper pipe 130 is its left end, and the left part of the third end 131 of the copper pipe 130 forms a second constriction structure.

The second neck section 132 is connected to the first end 111 of the steel pipe 110 . The second transition section 133 is used to connect the second neck section 132 and the rest of the copper tube 130 , that is, the second transition section 133 is located at the second neck section 132 and the rest of the copper tube 130 in the extending direction of the copper tube 130 . Partial pipe segments are connected between and with each of them. It can be understood that the diameter of the second constriction section 132 is smaller than the diameter of the rest of the copper pipe 130, and a liquid storage tank 140 is formed between the inner peripheral surface of the remaining pipe section of the copper pipe 130 and the outer peripheral surface of the steel pipe 110, and the liquid storage tank 140 is formed. The opening of the tank 140 faces to the right, and the second transition section 133 is the bottom of the tank 140 . Here, the inner peripheral surface of the remaining part of the copper pipe 130 is the inner peripheral surface of the portion of the copper pipe 130 opposite to the steel pipe 110 in the radial direction, and the length of this part of the copper pipe 130 is the height h of the liquid storage tank 140 . The distance between the inner peripheral surface of the remaining pipe section of the copper pipe 130 and the outer peripheral surface of the steel pipe 110 in the radial direction of the copper pipe 130 is the groove width w of the liquid storage tank 140 . The depth direction of the liquid storage tank 140 is consistent with the axial direction of the copper pipe 130 , that is, along the left-right direction.

Optionally, the value range of the groove height h is 3mm-5mm. In the embodiment shown in FIG. 7 , the copper pipe 130 is partially sleeved on the steel pipe 110 . It can be understood that in other embodiments, the copper pipe 130 can be completely sleeved on the steel pipe 110 , and the right end surface of the steel pipe 110 It can be flush with the right end surface of the copper pipe 130 .

Optionally, the length of the second neck section 132 is 3mm-10mm.

As shown in FIG. 8 , the fourth end 121 of the connecting pipe 120 protrudes into the copper pipe 130 from right to left until a part of the fourth end 121 of the connecting pipe 120 protrudes into the liquid storage tank 140 , which is in the copper pipe 140 . The pipe 130 is located between the copper pipe 130 and the first end 111 of the steel pipe 110 in the radial direction, and coincides with the copper pipe 130 and the first end 111 of the steel pipe 110 in the radial direction.

Further, the second transition section 133 has a certain length in the left-right direction, and there is an included angle between the second transition section 133 and the left-right direction, the diameter of the left end of the second transition section 133 is smaller than the diameter of the right end, and the second transition section 133 The diameter of the segment 133 gradually expands outward from left to right. This arrangement is to reduce the influence of stress concentration on the structural strength of the copper pipe 130 and ensure the structural strength of the copper pipe 130 . Optionally, the length of the second transition section 133 in the left-right direction is greater than or equal to 2 mm and less than or equal to 5 mm. Alternatively, in other embodiments, the second transition section 133 may also extend along the radial direction of the copper tube 130 , that is, perpendicular to the left-right direction.

As shown in FIG. 8 , there is a welding seam between the fourth end 121 of the connecting pipe 120 and the copper pipe 130 in the radial direction of the copper pipe 130 . Between the fourth end portion 121 and the copper pipe 130 , the fourth end portion 121 of the connection pipe 121 and the copper pipe 130 are connected. During welding, the solder 200 penetrates into the welding seam from the right end of the copper pipe 130, the unsolidified solder 200 flows to the left along the welding seam until the welding seam is completely filled, and then the excess solder 200 flows into the left side of the welding seam The liquid storage tank 140 is stored and solidified in the liquid storage tank 140, thereby preventing the excess solder 200 from continuing to penetrate into the steel pipe 110 along the steel pipe 110 and causing damage to the system.

Furthermore, as shown in FIG. 8 , the second transition section 133 may position the connecting pipe 130 to keep the welding depth of the connecting pipe 130 within a reasonable range. The part of the fourth end 121 of the connecting pipe 120 located in the liquid storage tank 140 forms double contact with the solder 200 in the liquid storage tank 140, that is, the inner and outer peripheral surfaces of the part are in contact with the solder 200, and the connecting pipe The end (left end) of the fourth end 121 of the 120 is buried in the solder 200 , thereby improving the connection reliability of the connecting pipe 120 and the copper pipe 130 , and effectively reducing the risk of pipe breakage.

Embodiment three:

The air-conditioning pipe fitting provided in this embodiment is described below by taking FIG. 9 and FIG. 10 as examples. In this embodiment, the first end 111 of the steel pipe 110 is sleeved on the third end 131 of the copper pipe 130 , and a liquid storage tank 140 is formed in the copper pipe 130 , that is, the liquid storage tank 140 is formed inside the copper pipe 130 .

Specifically, as shown in FIG. 9 and FIG. 10 , the copper pipe 130 is a straight pipe, and an inward flange 134 is formed at the third end 131 of the copper pipe 130 , and the flange 134 and the inner peripheral surface of the copper pipe 130 are formed between the flange 134 and the inner peripheral surface of the copper pipe 130 . A reservoir 140 is formed. The opening of the reservoir 140 faces to the right. The fourth end 121 of the connecting pipe 120 extends into the copper pipe 130 from right to left, and extends into the liquid storage tank 140 along the inner wall surface of the copper pipe 130 . The flange 131 can be used as the bottom of the liquid storage tank 140 and can abut against the fourth end 121 of the connecting pipe 120 to limit the position of the fourth end 121 of the connecting pipe 120 . The length of the flange 134 in the left-right direction is the groove height h of the liquid storage tank 140 . Optionally, the value range of the groove height h is 3mm-5mm, and the groove height h is preferably 3mm.

Optionally, as shown in FIG. 9 , the angle between the flange 134 and the inner peripheral surface of the copper tube 130 is θ, optionally, θ is greater than or equal to 30° and less than or equal to 90°. Preferably, the angle θ between the flange 134 and the inner peripheral surface of the copper tube 130 is 45°.

Optionally, the maximum width w of the reservoir 140 is greater than or equal to (a+0.5) mm. a is the wall thickness of the connecting pipe 120 .

Optionally, the length of the first end 111 of the steel pipe 110 is 3mm-10mm.

In this embodiment, the flange 134 is formed on the leftmost side of the copper pipe 130 . It can be understood that, in other embodiments, the liquid storage tank 140 may be formed at any position on the inner peripheral surface of the copper pipe 130, and the formation of the liquid storage tank 140 inside the copper pipe 130 is not limited to the flipping in this embodiment. Side 134. As an example, a liquid storage tank body is connected to the inner peripheral surface of the copper pipe 130, and the liquid storage tank body first extends inward for a certain distance from the connection position with the inner peripheral surface of the copper pipe 130, and then extends to the right for a certain distance, Therefore, a liquid storage tank 140 with an opening facing to the right is formed between the liquid storage tank body and the inner peripheral surface of the copper pipe 130 .

Embodiment 4:

The air-conditioning pipe fitting provided in this embodiment is described below by taking FIG. 11 as an example. In this embodiment, the third end portion 131 of the copper pipe 130 is sleeved on the first end portion 111 of the steel pipe 110 , and a part of the first end portion 111 of the steel pipe 110 is formed with a first constriction structure. The mouth structure includes a first transition section 113 and a first neck section 114 that are connected. The first transition section 113 is used to connect the first neck section 114 with the rest of the first end 111 of the steel pipe 110 . The remainder of the first end 111 of the steel tube 110 may be referred to as the connecting segment 112 . That is to say, the first end portion 111 of the steel pipe 110 includes the connecting section 112 , the first transition section 113 and the first neck section 114 which are connected in sequence in the extending direction (left and right direction). The connecting section 112 is also used to connect with the rest of the steel pipe 110 .

A portion of the third end portion 131 of the copper tube 130 forms a second constriction structure, and the second constriction structure includes a second constriction section 132 and a second transition section 133 . In this embodiment, the third end 131 of the copper pipe 130 is its left end, and the left part of the third end 131 of the copper pipe 130 forms a second constriction structure. The second transition section 133 is used to connect the second neck section 132 and the rest of the copper tube 130 , that is, the second transition section 133 is located at the second neck section 132 and the rest of the copper tube 130 in the extending direction of the copper tube 130 . Partial pipe segments are connected between and with each of them.

The connecting section 112 of the steel pipe 110 is connected to the second neck section 132 of the copper pipe 130 . A liquid storage tank 140 is formed between the inner peripheral surface of the remaining pipe sections of the copper pipe 130 and the first constricted section 114 , and the opening of the liquid storage tank 140 faces to the right. As shown in FIG. 11 , the length of the first constriction section 114 is the groove height h of the liquid storage tank 140 , and the outer peripheral surface of the first constriction section 114 and the inner peripheral surface of the rest of the copper pipe 130 are in the position of the copper pipe 130 . The distance in the radial direction is the groove width w of the liquid storage tank 140 .

Optionally, the value range of the groove height h is 3mm-5mm. The groove width w is greater than or equal to (a+0.5) mm, where a is the wall thickness of the connecting pipe 120 .

Optionally, the lengths of the connecting section 112 and the second neck section 132 are equal, and the length may be 3 mm-10 mm.

When the air conditioning pipe in this embodiment is connected to the connecting pipe 120, the fourth end 121 of the connecting pipe 120 can extend into the copper pipe 130 from right to left until a part of the fourth end 121 of the connecting pipe 120 extends into the liquid storage in slot 140.

In the description of the present disclosure, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Rear, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial, The orientations or positional relationships indicated by "radial direction", "circumferential direction", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying the indicated devices or elements It must have, be constructed, and operate in a particular orientation, and therefore should not be construed as a limitation of the present disclosure.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present disclosure, "plurality" means at least two, such as two, three, etc., unless expressly and specifically defined otherwise.

In the present disclosure, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two components or the interaction relationship between the two components, unless otherwise expressly qualified. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.

In the present disclosure, unless expressly stated and defined otherwise, a first feature "on" or "under" a second feature may be in direct contact with the first and second features, or indirectly through an intermediary between the first and second features touch. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In this disclosure, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., mean a specific feature, structure, material, or Features are included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

Although the embodiments of the present disclosure have been shown and described above, it should be understood that the above-described embodiments are exemplary and should not be construed as limitations of the present disclosure, and those of ordinary skill in the art may interpret the above-described embodiments within the scope of the present disclosure. Embodiments are subject to variations, modifications, substitutions and variations.

Claims

An air-conditioning pipe fitting, characterized in that it comprises:

a steel pipe including a first end and a second end;

A copper tube, the copper tube is connected to the first end, a liquid storage tank is formed between the copper tube and the first end, or a liquid storage tank is formed in the copper tube, and the storage tank is The opening of the liquid tank is oriented away from the second end of the steel pipe.
The air-conditioning pipe fitting according to claim 1, wherein the liquid storage tank is annular.
The air-conditioning pipe fitting according to claim 1, wherein the copper pipe is sleeved on the first end portion, a part of the first end portion forms a first constriction structure, and the first end portion It includes a connecting section, a first transition section and a first constricted section which are connected in sequence in its extending direction, the connecting section is also used for connecting with the rest of the steel pipe, and the connecting section is connected with the copper pipe, The liquid storage tank is formed between the outer peripheral surface of the first neck section and the inner peripheral surface of the copper tube.
The air-conditioning pipe fitting of claim 3, wherein the first transition section extends along a radial direction of the first end of the steel pipe.
The air-conditioning pipe fitting according to claim 3, wherein the first transition section has a certain length in the left-right direction, an included angle is formed between the first transition section and the left-right direction, and the first transition section has a certain length in the left-right direction. The diameter of the left end of the transition section is larger than that of the right end, and the diameter of the first transition section gradually decreases inward from left to right.
The air-conditioning pipe fitting according to claim 1, wherein the copper pipe is sleeved on the first end portion, a part of the first end portion forms a first constriction structure, and the first end portion It includes a connecting section and a bending section which are connected in sequence in its extending direction, the connecting section is also used for connecting with the rest of the steel pipe, the connecting section is connected with the copper pipe, and the bending section is connected with the There is an included angle between the axial directions of the first ends so that the liquid storage tank is formed between the outer peripheral surface of the bending section and the inner peripheral surface of the copper tube.
The air-conditioning pipe fitting according to claim 6, wherein the angle between the bending section and the left-right direction is greater than or equal to 30° and less than or equal to 90°.
The air-conditioning pipe fitting according to claim 6, wherein the diameter of the bending section gradually decreases inward from left to right.
The air-conditioning pipe fitting according to any one of claims 3 to 8, wherein the copper pipe is a straight pipe.
The air-conditioning pipe fitting according to claim 1, wherein the copper pipe is sleeved on the first end, and a part of the pipe section of the copper pipe forms a second constriction structure, and the second constriction structure It includes a second constriction section and a second transition section, the second transition section is used to connect the second constriction section and the remaining pipe sections of the copper pipe, and the second constriction section is connected to the The first ends are connected, and the liquid storage tank is formed between the inner peripheral surface of the remaining pipe sections of the copper pipe and the outer peripheral surface of the steel pipe.
The air conditioning pipe fitting according to claim 10, wherein the second transition section extends along the radial direction of the copper pipe.
The air-conditioning pipe fitting according to claim 10, wherein the second transition section has a certain length in the left-right direction, an included angle is formed between the second transition section and the left-right direction, and the second transition section has a certain length in the left-right direction. The diameter of the left end of the transition section is smaller than the diameter of the right end, and the diameter of the second transition section gradually expands outward from left to right.
The air conditioning pipe fitting according to any one of claims 10 to 12, wherein the first end portion is a straight pipe.
The air-conditioning pipe fitting according to claim 1, wherein the copper pipe comprises a third end portion, the first end portion is sleeved on the third end portion, and the copper pipe is formed with the Reservoir.
The air-conditioning pipe fitting according to claim 14, wherein an inward flange is formed at the third end, and the liquid storage tank is formed between the flange and the inner peripheral surface of the copper pipe .
The air-conditioning pipe fitting according to claim 15, wherein the angle between the flange and the inner peripheral surface of the copper pipe is greater than or equal to 30° and less than or equal to 90°.
An air conditioning pipeline, characterized in that it includes:

an air-conditioning pipe fitting, the air-conditioning fitting being the air-conditioning fitting according to any one of claims 1 to 16; and

A connecting pipe, one end of the connecting pipe extends into the copper pipe and is welded with the copper pipe, and the liquid storage tank is used for receiving the solder for welding the copper pipe and the connecting pipe.
The air conditioning pipeline according to claim 17, wherein at least a part of the end of the connecting pipe is located in the liquid storage tank, or the end of the connecting pipe is located in the storage tank. above the opening of the tank.
The air-conditioning pipeline according to claim 17, wherein the inner wall of the copper pipe is connected with the connecting pipe, the wall thickness of the connecting pipe is a mm, and the outer circumference of the first constricted section is The distance between the surface and the inner peripheral surface of the copper pipe in the radial direction of the copper pipe is the groove width w of the liquid storage tank, and the groove width w of the liquid storage tank is greater than or equal to (a+0.5) mm.
The air-conditioning pipeline according to claim 17, wherein the inner wall of the copper pipe is connected with the connecting pipe, the wall thickness of the connecting pipe is a mm, and the remaining pipe sections of the copper pipe have a thickness of a mm. The distance between the inner peripheral surface and the outer peripheral surface of the steel pipe in the radial direction of the copper pipe is the groove width w of the liquid storage tank, and the groove width w of the liquid storage tank is greater than or equal to (a+0.5) mm.
The air-conditioning pipeline according to claim 17, wherein the inner wall of the copper pipe is connected with the connecting pipe, the wall thickness of the connecting pipe is a mm, and the maximum width w of the liquid storage tank is greater than or Equal to (a+0.5)mm.
An air conditioner, characterized by comprising the air conditioning pipeline according to any one of claims 17 to 21.