CN113236879B - Air conditioner pipe fitting, air conditioner pipeline and air conditioner - Google Patents
Air conditioner pipe fitting, air conditioner pipeline and air conditioner Download PDFInfo
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- CN113236879B CN113236879B CN202110430510.2A CN202110430510A CN113236879B CN 113236879 B CN113236879 B CN 113236879B CN 202110430510 A CN202110430510 A CN 202110430510A CN 113236879 B CN113236879 B CN 113236879B
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- pipe
- copper
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- copper pipe
- tube
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
- F16L13/02—Welded joints
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
- F16L13/007—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints specially adapted for joining pipes of dissimilar materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
- F24F13/0209—Ducting arrangements characterised by their connecting means, e.g. flanges
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The embodiment of the invention provides an air conditioner pipe fitting, an air conditioner pipeline and an air conditioner. The steel pipe in the air conditioner pipe fitting is not directly connected with the connecting pipe, but is connected with the copper pipe at the joint of the steel pipe, and the connecting pipe stretches into the copper pipe and is connected with the copper pipe, so that the steel pipe is finally connected with the connecting pipe. 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, and is easy to realize, so that the welding difficulty of the air conditioner pipe fitting and the connecting pipe is reduced. During the process of welding the copper pipe and the connecting pipe, the solder firstly flows into the space between the connecting pipe and the copper pipe, and the surplus solder flows into the liquid storage tank and is condensed, so that the surplus solder cannot permeate along the steel pipe and flow into the system to form weld flash, and the system is damaged.
Description
Technical Field
The invention relates to the technical field of air conditioner manufacturing, in particular to an air conditioner pipe fitting, an air conditioner pipeline and an air conditioner with the air conditioner pipeline.
Background
At present, a pipeline piece is required to be used for conveying a refrigerant in an air conditioning system, a copper pipe is conventionally used in the industry, but the price of a copper material is higher, compared with the copper pipe, the cost of the steel pipe is low, the pressure resistance is high, the heat conductivity is low, the heat preservation coefficient is higher than that of a copper pipeline, and the energy efficiency of the air conditioning system can be improved when the steel pipe is applied to the air conditioning system. However, the existing flame brazing solder is not adhered to the steel pipeline, only silver-containing solder can be used for flame welding between steel materials, and the cost of the solder is too high to be suitable for popularization and business.
Disclosure of Invention
The present invention has been made based on the findings and knowledge of the inventors regarding the following facts and problems:
in order to solve the above technical problems, as shown in fig. 1-3, in the related art, a copper sleeve is generally added at a joint of steel pipes, a first steel pipe 001 is connected with a first copper sleeve 002, a second steel pipe 003 is connected with a second copper sleeve 004, and the first copper sleeve 002 is connected with the second copper sleeve 004, so that the connection between the first steel pipe 001 and the second steel pipe 004 can be realized, but the air-conditioning pipe fitting in the related art often has the following problems:
the existing flame brazing solder is not adhered to the steel pipeline, in the welding stage, although a copper sleeve is added at the joint of the steel pipeline, the heat dissipation effect is slower than that of the copper pipeline due to low heat conductivity of the steel pipeline, the temperature of the joint of the copper sleeve and the steel pipeline is higher during welding, surplus solder 005 is not easy to solidify, the permeable position is too long, the solder is difficult to adhere to the inner wall of the steel pipeline, and the solder is easy to flow into a system along the steel pipeline wall to damage the system.
The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, the embodiment of the invention provides an air conditioner pipe fitting with low welding difficulty, good reliability, low leakage risk and low fracture risk. The embodiment of the invention also provides an air conditioner pipeline with the air conditioner pipe fitting and an air conditioner with the air conditioner pipeline.
According to an embodiment of the invention, an air conditioning pipe fitting comprises: a steel pipe comprising a first end and a second end; the copper pipe is connected with the first end, a liquid storage groove is formed between the copper pipe and the first end or is formed in the copper pipe, and the opening of the liquid storage groove faces to the direction away from the second end of the steel pipe.
The air conditioner pipe fitting provided by the embodiment of the invention is provided with a liquid storage tank for receiving redundant solder for welding the copper pipe and the connecting pipe. The steel pipe in the air conditioner pipe fitting provided by the embodiment of the invention is not directly connected with the connecting pipe (other pipelines), but is connected with the copper pipe at the joint of the steel pipe, and the connecting pipe stretches into the copper pipe and is connected with the copper pipe, so that the steel pipe is finally connected with the connecting pipe. 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, and is easy to realize, so that the welding difficulty of the air conditioner pipe fitting and the connecting pipe is reduced. During the process of welding the copper pipe and the connecting pipe, the solder firstly flows into the space between the connecting pipe and the copper pipe, and the surplus solder flows into the liquid storage tank and is condensed, so that the surplus solder cannot permeate along the steel pipe and flow into the system to form weld flash, and the system is damaged.
Therefore, the air conditioner pipe fitting provided by the embodiment of the invention has the advantages of low welding difficulty, good reliability, low leakage risk and low fracture risk.
In addition, the air conditioner pipe fitting according to the invention has the following additional technical features:
in some embodiments, the reservoir is annular.
In some embodiments, the copper pipe is sleeved on the first end, a part of the first end forms a first necking structure, the first end comprises a connecting section, a first transition section and a first necking section which are sequentially connected in the extending direction of the first end, the connecting section is further used for being connected with the rest of the steel pipe, the connecting section is connected with the copper pipe, and the liquid storage groove is formed between the outer peripheral surface of the first necking section and the inner peripheral surface of the copper pipe.
In some embodiments, the copper pipe is sleeved on the first end, a part of the first end forms a first necking structure, the first end comprises a connecting section and a bending section which are sequentially connected in the extending direction of the first end, the connecting section is further used for being connected with the rest of the steel pipe, the connecting section is connected with the copper pipe, and an included angle is formed between the bending section and the axial direction of the first end, so that a liquid storage groove is formed between the outer peripheral surface of the bending section and the inner peripheral surface of the copper pipe.
In some embodiments, the copper tube is a straight tube.
In some embodiments, the copper pipe is sleeved on the first end, a part of the pipe section of the copper pipe forms a second necking structure, the second necking structure comprises a second necking section and a second transition section, the second transition section is used for connecting the second necking section and the rest of the pipe section of the copper pipe, the second necking section is connected with the first end, and the liquid storage groove is formed between the inner peripheral surface of the rest of the pipe section of the copper pipe and the outer peripheral surface of the steel pipe.
In some embodiments, the first end of the steel tube is a straight tube.
In some embodiments, the copper tube includes a third end over which the first end is sleeved, the copper tube having the reservoir formed therein.
In some embodiments, an inward flange is formed at the third end, the flange and the inner peripheral surface of the copper tube forming the reservoir therebetween.
According to another aspect of the invention, an air conditioning pipeline is provided, which comprises the air conditioning pipe fitting and the connecting pipe according to any one of the embodiments of the invention, one end of the connecting pipe extends into the copper pipe and is welded with the copper pipe, and the liquid storage groove is used for receiving welding flux for welding the copper pipe and the connecting pipe.
In some embodiments, at least a portion of the end of the connecting tube is located in the reservoir, or the end of the connecting tube is located above an opening of the reservoir.
According to another aspect of the invention, an air conditioner is provided, comprising an air conditioning line according to any one of the embodiments of the invention.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a first embodiment of an air conditioning duct in the related art.
Fig. 2 is a second embodiment of an air conditioning duct in the related art.
Fig. 3 is a third embodiment of an air conditioning duct in the related art.
Fig. 4 is a schematic structural diagram of an air conditioning pipe according to a first embodiment of the present invention.
Fig. 5 is a schematic structural diagram of an air conditioning pipeline according to a first embodiment of the present invention.
Fig. 6 is another schematic structural diagram of an air conditioning pipe according to a first embodiment of the present invention.
Fig. 7 is a schematic structural diagram of an air conditioning pipe according to a second embodiment of the present invention.
Fig. 8 is a schematic structural diagram of an air conditioning pipeline in a second embodiment of the present invention.
Fig. 9 is a schematic structural view of an air conditioning pipe fitting in a third embodiment of the present invention.
Fig. 10 is a schematic structural diagram of an air conditioning pipeline in a third embodiment of the present invention.
Fig. 11 is a schematic structural view of an air conditioning pipe fitting in a fourth embodiment of the present invention.
Reference numerals:
a first steel pipe 001; a first copper sheath 002; a second steel pipe 003; a second copper sheath 004; solder 005; an air conditioning pipe 100; a steel pipe 110; a first end 111; a connecting section 112; a first transition section 113; a first necked-down section 114; bending section 115; a connection pipe 120; a fourth end 121; copper tubing 130; a third end 131; a second necked-down section 132; a second transition section 133; a flange 134; a liquid storage tank 140; solder 200.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
An air conditioning tube 100 according to an embodiment of the present invention is described below with reference to fig. 4 to 11. The air conditioning tube 100 includes a steel tube 110 and a copper tube 130.
The steel pipe 110 includes a first end 111 and a second end (not shown). It is understood that the first end 111 of the steel pipe 110 is opposite to the second end of the steel pipe 110 in the extending direction of the steel pipe 110.
The copper tube 130 is connected to the first end 111 of the steel tube 110, and a liquid storage tank 140 is constructed between the copper tube 130 and the first end 111 of the steel tube 110, or the liquid storage tank 140 is formed in the copper tube 130. That is, the reservoir 140 may be formed by the copper pipe 130 and the first end 111 of the steel pipe 110, or may be formed by the copper pipe 130 itself. For example, the copper pipe 130 is fitted over the first end 111 of the steel pipe 110, and the inner circumferential surface of the copper pipe 130 is spaced from the outer circumferential surface of the first end 111 of the steel pipe 110 to define the liquid storage tank 140. When the reservoir 140 is self-constructed from the copper tube 130, the reservoir 140 is located inside the copper tube 130. And the opening of the reservoir 140 is directed 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 tube 130 is used for welding with other pipelines of the air conditioner, such as the connecting tube 120, and the liquid storage tank 140 is used for receiving welding flux for welding the copper tube 130 and the connecting tube 120.
For example, the connection tube 120 has a fourth end 121. The fourth end 121 of the connection tube 120 is adapted to extend into the copper tube 130 and to be welded to the inner wall of the copper tube 130. At least a portion of the fourth end 121 of the connecting tube 120 is located in the reservoir 140. That is, the copper tube 130 is sleeved on the fourth end 121 of the connection tube 120, and at least a portion of the fourth end 121 of the connection tube 120 extends into the reservoir 140 from the opening of the reservoir 140, and the tip (free end) of the fourth end 121 of the connection tube 120 is located in the reservoir 140. It will be appreciated that the opening of the reservoir 140 is oriented opposite the direction of insertion of the connecting tube 120, and that the reservoir 140 is opposite the fourth end 121 of the connecting tube 120 so that the fourth end 121 of the connecting tube 120 can extend from the opening of the reservoir 140 into the reservoir 140. Alternatively, the fourth end 121 of the connecting tube 120 may also be located above the reservoir 140, i.e. the fourth end 121 of the connecting tube 120 does not actually extend into the reservoir 140. Preferably, at least a portion of the fourth end 121 of the connecting tube 120 is located in the reservoir 140.
The fourth end 121 of the connecting tube 120 is a copper tube segment. The fourth end 121 of the connection pipe 120 is connected to the copper pipe 130 by soldering, and a portion of the solder 200 used for soldering is filled between the fourth end 121 of the connection pipe 120 and the copper pipe 130 in the radial direction of the copper pipe 130 so as to connect the fourth end 121 of the connection pipe 121 and the copper pipe 130, and the remaining portion of the solder 200 is filled in the liquid reservoir 140. Here, the solder 200 located between the fourth end 121 of the connection tube 120 and the copper tube 130 plays a role of actual connection, and its length in the extending direction of the fourth end 121 of the connection tube 120 is "soldering depth". The remaining portion of the solder 200, namely, the surplus solder 200 when soldering the fourth end 121 of the connection pipe 120 and the copper pipe 130, eventually flows into the reservoir 140 without continuing to infiltrate into the inside of the pipe fitting along the steel pipe 110. Thereby, the connection pipe 120 and the steel pipe 110 are connected to each other through the copper pipe 130. The connection pipe 120 may be a copper pipe or a steel pipe to which a copper pipe is connected, which is not limited herein.
When the air-conditioning pipe fitting provided by the embodiment of the invention is manufactured, the copper pipe 130 and the steel pipe 110 can be welded in advance, namely, the copper pipe 130 can be welded on the first end 111 of the steel pipe 110, and only the flame welding is needed to be adopted on site for welding the copper pipe 130 and the fourth end 121 of the connecting pipe 120.
The air conditioner pipe fitting provided by the embodiment of the invention is provided with a liquid storage tank for receiving redundant solder for welding the copper pipe and the connecting pipe. The steel pipe in the air conditioner pipe fitting provided by the embodiment of the invention is not directly connected with the connecting pipe (other pipelines), but is connected with the copper pipe at the joint of the steel pipe, and the connecting pipe stretches into the copper pipe and is connected with the copper pipe, so that the steel pipe is finally connected with the connecting pipe. 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, and is easy to realize, so that the welding difficulty of the air conditioner pipe fitting and the connecting pipe is reduced. During the process of welding the copper pipe and the connecting pipe, the solder firstly flows into the space between the connecting pipe and the copper pipe, and the surplus solder flows into the liquid storage tank and is condensed, so that the surplus solder cannot permeate along the steel pipe and flow into the system to form weld flash, and the system is damaged.
In addition, in the in-process that the connecting pipe stretches into the copper sheathing, the bottom of reservoir can be to the depth of stretching into of connecting pipe restriction to control the welding depth of connecting pipe effectively and make the welding depth of connecting pipe keep in reasonable scope, reduce the leakage risk of liquid agent in the pipeline. And the condensed solder in the liquid storage tank forms double contact with the part of the connecting pipe extending into the liquid storage tank, so that the connection reliability of the connecting pipe and the copper pipe is improved, and the fracture risk of the pipeline is effectively reduced.
Therefore, the air conditioner pipe fitting provided by the embodiment of the invention has the advantages of low welding difficulty, good reliability, low leakage risk and low fracture risk.
In some embodiments, the reservoir 140 is annular.
In some embodiments, the radial directions of the first end 111 of the steel tube 110, the fourth end 121 of the connection tube 120, and the copper tube 130 are the same as each other. The first end 111 of the steel pipe 110, the fourth end 121 of the connection pipe 120, and the copper pipe 130 are also identical to each other in the axial direction.
For convenience of description, the technical solution of the present invention will be described below by taking the left-right direction as an example of the extending direction of the first end 111 of the steel pipe 110, the fourth end 121 of the connecting pipe 120 and the copper pipe 130, 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 right, and the fourth end 121 of the connecting pipe 120 extends into the liquid storage tank 140 from right to left.
Several embodiments provided by the present invention are described in detail below with reference to fig. 4-11.
Embodiment one:
the air conditioning pipe fitting provided in the present embodiment is described below by taking fig. 4 to 6 as an example. As shown in fig. 4, the third end 131 of the copper pipe 130 is sleeved on the first end 111 of the steel pipe 110, and a part of the first end 111 of the steel pipe 110 is formed with a first necking structure including a first transition section 113 and a first necking section 114 connected to each other. The first transition section 113 is used to connect the first necked-down section 114 with the remainder of the first end 111 of the steel pipe 110. The remaining portion of the first end 111 of the steel pipe 110 may be referred to as a connection section 112. That is, the first end portion 111 of the steel pipe 110 includes a connection section 112, a first transition section 113, and a first necking section 114, which are sequentially connected in the extending direction (left-right direction) thereof. The connection section 112 is also used to connect with the rest of the steel pipe 110.
As an example, as shown in fig. 4, the connection section 112, the first transition section 113 and the first necking section 114 are sequentially arranged from left to right and sequentially connected to form a first end 111 of the steel pipe 110, and the third end 131 of the copper pipe 130 is sleeved on the first end 111 of the steel pipe 110. The connection section 112 is connected to a copper tube 130. As shown in fig. 4, the copper tube 130 is a straight tube, the diameter of the first necking section 114 is smaller than that of the connecting section 112, and a liquid storage groove 140 is formed between the outer peripheral surface of the first necking section 114 and the inner peripheral surface of the copper tube 130. The inner peripheral surface of the copper pipe 130 here is the inner peripheral surface of the portion thereof opposed to the first necked-down section 114 in the radial direction thereof.
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 necking segment 114 is the groove height h of the liquid storage groove 140, and the distance between the outer peripheral surface of the first necking segment 114 and the inner peripheral surface of the copper pipe 130 in the radial direction of the copper pipe 130 is the groove width w of the liquid storage groove 140. The depth direction of the reservoir 140 coincides with the axial direction of the copper tube 130, i.e., in the left-right direction.
Alternatively, the slot height h can range from 3mm to 5mm. In the embodiment shown in fig. 4, the copper tube 130 is partially sleeved on the steel tube 110, it is understood that in other embodiments, the copper tube 130 may be completely sleeved on the steel tube 110, and the right end surface of the first necking section 114 may be flush with the right end surface of the copper tube 130.
Alternatively, the wall thickness of the connection pipe 120 is a mm, and the groove width w is equal to or greater than (a+0.5) mm.
Alternatively, the length of the connecting section 112 is 3mm-10mm.
As shown in fig. 5, when the air conditioning pipe fitting provided in the present embodiment is connected to the connection pipe 120, the fourth end 121 of the connection pipe 120 extends into the copper pipe 130 from right to left until a portion of the fourth end 121 of the connection pipe 120 extends into the liquid storage tank 140. The portion of the fourth end 121 of the connection tube 120 is located between the copper tube 130 and the first necked-down section 114 in the radial direction of the copper tube 130, coinciding with the copper tube 130 and the first necked-down section 114 in the radial direction.
Further, the first transition section 113 has a certain length in the left-right direction, and an included angle is formed 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 that of the right end of the first transition section 113, and the diameter of the first transition section 113 gradually decreases from left to right. The 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. Alternatively, the length of the first transition section 113 in the left-right direction is 2mm or more and 5mm or less. Alternatively, in other embodiments, the first transition section 113 may also extend in the radial direction of the first end 111 of the steel pipe 110, i.e. perpendicular to the left-right direction.
As shown in fig. 5, the fourth end 121 of the connection pipe 120 and the copper pipe 130 have a weld therebetween in the radial direction of the copper pipe 130, and a portion of the solder 200 is filled between the fourth end 121 of the connection pipe 120 and the copper pipe 130 in the radial direction of the copper pipe 130 so as to connect the fourth end 121 of the connection pipe 121 and the copper pipe 130. During welding, the solder 200 permeates into the welding seam from the right end of the welding seam, the unset solder 200 flows leftwards along the welding seam until the welding seam is completely filled, and then the excessive solder 200 is converged into the liquid storage tank 140 positioned at the left side of the welding seam, and is stored and solidified in the liquid storage tank 140, so that the phenomenon that the excessive solder 200 continuously permeates into the steel pipe 110 along the steel pipe 110 and damages a system is avoided.
Furthermore, the first transition 113 may position the connection pipe 130 to maintain the welding depth of the connection pipe 130 within a reasonable range. The portion of the fourth end 121 of the connection pipe 120 located in the reservoir 140 is brought into double contact with the solder 200 in the reservoir 140, that is, both the inner and outer circumferential surfaces of the portion are in contact with the solder 200, and the tip (left end) of the fourth end 121 of the connection pipe 120 is buried in the solder 200, whereby the connection reliability of the connection pipe 120 and the copper pipe 130 is improved, and the risk of breakage of the pipe is effectively reduced.
Alternatively, the steel tube 110 may be a carbon steel tube or a stainless steel tube.
The first end 111 of the steel pipe 110 may not include the first necking section 114, as shown in fig. 6, and the first end 111 of the steel pipe 110 includes a connecting section 112 and a bending section 115 connected to each other. It will be appreciated that bent segment 115 corresponds to first transition segment 113 in fig. 4, and that bent segment 115 tapers from left to right in diameter. The bending section 115 has a certain length in the left-right direction, and an included angle θ is formed between the bending section 115 and the left-right direction, and optionally θ is 30 ° or more and 90 ° or less.
A reservoir 140 is formed between the outer circumferential surface of the bent section 115 and the inner circumferential surface of the copper tube 130. As shown in fig. 6, the length of the bent section 115 in the left-right direction is the groove height h of the liquid storage groove 140. Optionally, the groove height h is 3mm or more and 5mm or less. Further alternatively, the right end of the bent section 115 has a diameter L, the fourth end 121 of the connection pipe 120 is a branch pipe section, the diameter of the fourth end 121 of the connection pipe 120 is b mm, and L is equal to or less than [ b-2 x (a+0.5) ] mm.
Embodiment two:
the air conditioning pipe fitting provided in the present embodiment is described below by taking fig. 7 and 8 as an example. As shown in fig. 7 and 8, the third end 131 of the copper pipe 130 is fitted over 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 131 of the copper tube 130 forms a second necked-down structure including a second necked-down section 132 and a second transition section 133. In this embodiment, the third end 131 of the copper tube 130 is the left end thereof, and the left portion of the third end 131 of the copper tube 130 forms a second necking structure.
The second necked-down 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 necked-down section 132 with the remaining sections of the copper tubing 130, i.e., the second transition section 133 is located between and connected to each of the second necked-down section 132 and the remaining sections of the copper tubing 130 in the direction of extension of the copper tubing 130. It will be appreciated that the diameter of the second necking segment 132 is smaller than the diameter of the rest of the pipe segment of the copper pipe 130, a liquid storage groove 140 is formed between the inner peripheral surface of the rest of the pipe segment of the copper pipe 130 and the outer peripheral surface of the steel pipe 110, the opening of the liquid storage groove 140 faces to the right, and the second transition segment 133 is the bottom of the liquid storage groove 140. Here, the inner circumferential surface of the remaining portion of the tube segment of the copper tube 130 is the inner circumferential surface of the portion of the copper tube 130 opposite to the steel tube 110 in the radial direction thereof, and the length of the portion of the copper tube 130 is the groove height h of the liquid storage groove 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 groove 140. The depth direction of the reservoir 140 coincides with the axial direction of the copper tube 130, i.e., in the left-right direction.
Alternatively, the slot height h can range from 3mm to 5mm. In the embodiment shown in fig. 7, the copper tube 130 is partially sleeved on the steel tube 110, it is understood that in other embodiments, the copper tube 130 may be completely sleeved on the steel tube 110, and the right end surface of the steel tube 110 may be flush with the right end surface of the copper tube 130.
Alternatively, the wall thickness of the connection pipe 120 is a mm, and the groove width w is equal to or greater than (a+0.5) mm.
Optionally, the second necked-down section 132 is 3mm to 10mm in length.
As shown in fig. 8, the fourth end 121 of the connection pipe 120 extends into the copper pipe 130 from right to left until a portion of the fourth end 121 of the connection pipe 120 extends into the reservoir 140, which is located between the copper pipe 130 and the first end 111 of the steel pipe 110 in the radial direction of the copper pipe 130, 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 an included angle is formed 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 that of the right end of the second transition section 133, and the diameter of the second transition section 133 gradually expands outwards from left to right. This arrangement is to reduce the influence of stress concentration on the structural strength of the copper tube 130, and to ensure the structural strength of the copper tube 130. Alternatively, the length of the second transition section 133 in the left-right direction is 2mm or more and 5mm or less. Alternatively, in other embodiments, the second transition section 133 may also extend in the radial direction of the copper tube 130, i.e., perpendicular to the left-right direction.
As shown in fig. 8, the fourth end 121 of the connection pipe 120 and the copper pipe 130 have a weld therebetween in the radial direction of the copper pipe 130, and a portion of the solder 200 is filled between the fourth end 121 of the connection pipe 120 and the copper pipe 130 in the radial direction of the copper pipe 130 so as to connect the fourth end 121 of the connection pipe 121 and the copper pipe 130. During welding, the solder 200 permeates into the welding seam from the right end of the copper pipe 130, the unset solder 200 flows leftwards along the welding seam until the welding seam is completely filled, and then the excessive solder 200 is converged into the liquid storage tank 140 positioned at the left side of the welding seam and stored and solidified in the liquid storage tank 140, so that the phenomenon that the excessive solder 200 continuously permeates into the steel pipe 110 along the steel pipe 110 and damages a system is avoided.
Further, as shown in fig. 8, the second transition section 133 may position the connection pipe 130 to maintain the welding depth of the connection pipe 130 within a reasonable range. The portion of the fourth end 121 of the connection pipe 120 located in the reservoir 140 is brought into double contact with the solder 200 in the reservoir 140, that is, both the inner and outer circumferential surfaces of the portion are in contact with the solder 200, and the tip (left end) of the fourth end 121 of the connection pipe 120 is buried in the solder 200, whereby the connection reliability of the connection pipe 120 and the copper pipe 130 is improved, and the risk of breakage of the pipe is effectively reduced.
Embodiment III:
the air conditioning pipe fitting provided in the present embodiment is described below by taking fig. 9 and 10 as an example. In this embodiment, the first end 111 of the steel tube 110 is sleeved on the third end 131 of the copper tube 130, and the reservoir 140 is formed in the copper tube 130, that is, the reservoir 140 is formed in the copper tube 130.
Specifically, as shown in fig. 9 and 10, the copper tube 130 is a straight tube, an inward flange 134 is formed at the third end 131 of the copper tube 130, and a liquid reservoir 140 is formed between the flange 134 and the inner circumferential surface of the copper tube 130. The opening of the reservoir 140 is directed to the right. The fourth end 121 of the connection pipe 120 extends into the copper pipe 130 from right to left and extends into the reservoir 140 along the inner wall surface of the copper pipe 130. The flange 131 can serve as the bottom of the reservoir 140 and can abut against the fourth end 121 of the connecting tube 120 to limit the fourth end 121 of the connecting tube 120. The length of the flange 134 in the left-right direction is the tank height h of the liquid tank 140. Alternatively, the slot height h may take a value in the range of 3mm to 5mm, preferably the slot height h is 3mm.
Alternatively, as shown in fig. 9, the angle between the flange 134 and the inner peripheral surface of the copper tube 130 is θ, and alternatively, θ is 30 ° or more and 90 ° or less. 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 tube 120.
Alternatively, 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 tube 130. It is understood that in other embodiments, the liquid storage groove 140 may be formed at any position on the inner peripheral surface of the copper tube 130, and the forming manner of the liquid storage groove 140 inside the copper tube 130 is not limited to the flange 134 in the present embodiment. Illustratively, the copper tube 130 has a reservoir body attached to the inner peripheral surface thereof, which extends inwardly a distance first and then a distance to the right from the location of its attachment to the inner peripheral surface of the copper tube 130, such that a reservoir 140 is formed between the reservoir body and the inner peripheral surface of the copper tube 130 with the opening facing the right.
Embodiment four:
the air conditioning pipe fitting provided in the present embodiment is described below by taking fig. 11 as an example. In this embodiment, the third end 131 of the copper tube 130 is sleeved on the first end 111 of the steel tube 110, and a portion of the first end 111 of the steel tube 110 is formed with a first necking structure, which includes a first transition section 113 and a first necking section 114 that are connected. The first transition section 113 is used to connect the first necked-down section 114 with the remainder of the first end 111 of the steel pipe 110. The remaining portion of the first end 111 of the steel pipe 110 may be referred to as a connection section 112. That is, the first end portion 111 of the steel pipe 110 includes a connection section 112, a first transition section 113, and a first necking section 114, which are sequentially connected in the extending direction (left-right direction) thereof. The connection section 112 is also used to connect with the rest of the steel pipe 110.
A portion of the third end 131 of the copper tube 130 forms a second necked-down structure including a second necked-down section 132 and a second transition section 133. In this embodiment, the third end 131 of the copper tube 130 is the left end thereof, and the left portion of the third end 131 of the copper tube 130 forms a second necking structure. The second transition section 133 is used to connect the second necked-down section 132 with the remaining sections of the copper tubing 130, i.e., the second transition section 133 is located between and connected to each of the second necked-down section 132 and the remaining sections of the copper tubing 130 in the direction of extension of the copper tubing 130.
The connecting section 112 of the steel tube 110 is connected to the second necked-down section 132 of the copper tube 130. A liquid storage groove 140 is formed between the inner peripheral surface of the rest of the pipe section of the copper pipe 130 and the first necking section 114, and the opening of the liquid storage groove 140 faces to the right. As shown in fig. 11, the length of the first necking segment 114 is the groove height h of the liquid storage groove 140, and the distance between the outer peripheral surface of the first necking segment 114 and the inner peripheral surface of the rest of the pipe segment of the copper pipe 130 in the radial direction of the copper pipe 130 is the groove width w of the liquid storage groove 140.
Alternatively, the slot height h can range from 3mm to 5mm. The groove width w is equal to or greater than (a+0.5) mm, where a is the wall thickness of the connection pipe 120.
Alternatively, the connecting section 112 and the second necked-down section 132 may have the same length, and the length may be 3mm to 10mm.
When the air conditioning pipe fitting of the present embodiment is connected to the connection pipe 120, the fourth end 121 of the connection pipe 120 may extend into the copper pipe 130 from right to left until a portion of the fourth end 121 of the connection pipe 120 extends into the liquid storage tank 140.
In the description of the present invention, it should 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", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. 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, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (12)
1. An air conditioning tube, comprising:
a steel pipe comprising a first end and a second end;
the copper pipe is connected with the first end, a liquid storage groove for receiving welding flux welded by the copper pipe and the connecting pipe is formed between the copper pipe and the first end, or a liquid storage groove for receiving welding flux welded by the copper pipe and the connecting pipe is formed in the copper pipe, and an opening of the liquid storage groove faces a direction away from the second end of the steel pipe.
2. An air conditioning duct according to claim 1, wherein the reservoir is annular.
3. An air conditioning pipe fitting according to claim 1, wherein the copper pipe is sleeved on the first end portion, a portion of the first end portion forms a first necking structure, the first end portion includes a connection section, a first transition section and a first necking section which are sequentially connected in the extending direction of the first end portion, the connection section is further used for being connected with the rest of the steel pipe, the connection section is connected with the copper pipe, and the liquid storage tank is formed between the outer peripheral surface of the first necking section and the inner peripheral surface of the copper pipe.
4. An air conditioning pipe fitting according to claim 1, wherein the copper pipe is sleeved on the first end, a portion of the first end forms a first necking structure, the first end comprises a connecting section and a bending section which are sequentially connected in the extending direction of the first end, the connecting section is further used for being connected with the rest of the steel pipe, the connecting section is connected with the copper pipe, and an included angle is formed between the bending section and the axial direction of the first end so that the liquid storage groove is formed between the outer peripheral surface of the bending section and the inner peripheral surface of the copper pipe.
5. An air conditioning duct according to claim 3 or 4, wherein the copper tube is a straight tube.
6. An air conditioning pipe fitting according to claim 1, wherein the copper pipe is sleeved on the first end portion, a part of the pipe section of the copper pipe forms a second necking structure, the second necking structure comprises a second necking section and a second transition section, the second transition section is used for connecting the second necking section and the rest of the pipe section of the copper pipe, the second necking section is connected with the first end portion, and the liquid storage groove is formed between the inner peripheral surface of the rest of the pipe section of the copper pipe and the outer peripheral surface of the steel pipe.
7. The air conditioning duct of claim 6, wherein the first end is a straight tube.
8. An air conditioning duct according to claim 1, wherein the copper tube includes a third end over which the first end is sleeved, the copper tube having the reservoir formed therein.
9. An air conditioning duct according to claim 8, characterized in that an inward flange is formed at the third end, the flange and the inner peripheral surface of the copper tube forming the reservoir therebetween.
10. An air conditioning duct, comprising:
an air conditioning duct, the air conditioning duct being according to any one of claims 1 to 9; and
the connecting pipe, one end of the connecting pipe stretches into the copper pipe and is welded with the copper pipe, and the liquid storage tank is used for receiving welding flux for welding the copper pipe and the connecting pipe.
11. The air conditioning duct according to claim 10, wherein at least a portion of the end of the connecting tube is located in the reservoir or the end of the connecting tube is located above an opening of the reservoir.
12. An air conditioner comprising an air conditioning line according to claim 10 or 11.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110430510.2A CN113236879B (en) | 2021-04-21 | 2021-04-21 | Air conditioner pipe fitting, air conditioner pipeline and air conditioner |
| PCT/CN2022/070171 WO2022222549A1 (en) | 2021-04-21 | 2022-01-04 | Air conditioner pipe fitting, air conditioner pipeline, and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110430510.2A CN113236879B (en) | 2021-04-21 | 2021-04-21 | Air conditioner pipe fitting, air conditioner pipeline and air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113236879A CN113236879A (en) | 2021-08-10 |
| CN113236879B true CN113236879B (en) | 2023-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110430510.2A Active CN113236879B (en) | 2021-04-21 | 2021-04-21 | Air conditioner pipe fitting, air conditioner pipeline and air conditioner |
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| Country | Link |
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| CN (1) | CN113236879B (en) |
| WO (1) | WO2022222549A1 (en) |
Families Citing this family (6)
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|---|---|---|---|---|
| CN113236879B (en) * | 2021-04-21 | 2023-07-28 | 广东美的暖通设备有限公司 | Air conditioner pipe fitting, air conditioner pipeline and air conditioner |
| CN216158525U (en) * | 2021-09-22 | 2022-04-01 | 浙江盾安人工环境股份有限公司 | Connecting pipe assembly and control valve assembly with same |
| WO2023061367A1 (en) * | 2021-10-13 | 2023-04-20 | 广东美的暖通设备有限公司 | Pipe sleeve, pipeline device, and air conditioner having pipeline device |
| WO2023143087A1 (en) * | 2022-01-27 | 2023-08-03 | 浙江盾安人工环境股份有限公司 | End cover machining method, end cover, and pipeline assembly |
| CN116765536A (en) * | 2022-03-08 | 2023-09-19 | 浙江盾安禾田金属有限公司 | Valve body welding system and valve body welding method |
| CN115306961B (en) * | 2022-07-26 | 2023-04-25 | 含山瑞可金属有限公司 | Combined pipe fitting and air conditioning system pipeline |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5160514U (en) * | 1974-11-07 | 1976-05-13 | ||
| DE4203329A1 (en) * | 1991-06-15 | 1993-08-12 | Krupp Vdm Gmbh | GAS-TIGHT CONNECTION BETWEEN TUBE SMALL DIAMETER |
| JP2005121131A (en) * | 2003-10-16 | 2005-05-12 | Ranco Japan Ltd | Method of joining tube to valve housing, and connecting member therefor |
| CN2884068Y (en) * | 2006-03-08 | 2007-03-28 | 赵华 | Specially shaped metal parts welding structure |
| CN204226888U (en) * | 2014-10-29 | 2015-03-25 | 广州华凌制冷设备有限公司 | For the pipeline connection part of air conditioner |
| CN204692044U (en) * | 2015-05-12 | 2015-10-07 | Tcl空调器(中山)有限公司 | Air condition compressor and air conditioner |
| CN106555910B (en) * | 2015-09-30 | 2019-01-18 | 新昌县四通机电有限公司 | The pipeline assembly of pipe connecting structure and method, air-conditioner set |
| CN107304866A (en) * | 2016-04-25 | 2017-10-31 | 浙江盾安禾田金属有限公司 | A kind of joint pipe structure and its air conditioning reversing valve |
| CN206019448U (en) * | 2016-05-31 | 2017-03-15 | 杭州三花微通道换热器有限公司 | pipeline connecting device, pipeline assembly and heat exchanger |
| CN205781506U (en) * | 2016-07-20 | 2016-12-07 | 浙江三花股份有限公司 | A kind of four-way change-over valve adapter, four-way change-over valve and coolant circulating system |
| CN207395252U (en) * | 2017-06-29 | 2018-05-22 | 新昌县四通机电有限公司 | Expansion valve component |
| CN208205516U (en) * | 2018-05-04 | 2018-12-07 | 常州市武进苏南制冷设备有限公司 | High-speed rail air conditioning condenser copper-aluminium tube joint |
| CN211305265U (en) * | 2018-11-01 | 2020-08-21 | 中国海洋大学 | Brazing pipeline joint |
| CN209100814U (en) * | 2018-11-23 | 2019-07-12 | 马鞍山仪达空调有限公司 | A kind of pipelines of automobile air conditioner connector |
| CN211901920U (en) * | 2020-04-01 | 2020-11-10 | 深圳市喜德丽实业有限公司 | Socket joint pressfitting pipe fitting |
| CN113236879B (en) * | 2021-04-21 | 2023-07-28 | 广东美的暖通设备有限公司 | Air conditioner pipe fitting, air conditioner pipeline and air conditioner |
-
2021
- 2021-04-21 CN CN202110430510.2A patent/CN113236879B/en active Active
-
2022
- 2022-01-04 WO PCT/CN2022/070171 patent/WO2022222549A1/en unknown
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| WO2022222549A1 (en) | 2022-10-27 |
| CN113236879A (en) | 2021-08-10 |
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