CN113236879A - 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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- CN113236879A CN113236879A CN202110430510.2A CN202110430510A CN113236879A CN 113236879 A CN113236879 A CN 113236879A CN 202110430510 A CN202110430510 A CN 202110430510A CN 113236879 A CN113236879 A CN 113236879A
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- Prior art keywords
- 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 the joint of the steel pipe is connected with the copper pipe, and the connecting pipe extends 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 line, the welding process is easy to realize, and the welding difficulty of the air conditioner pipe fitting and the connecting pipe is reduced. In 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 flash, and the system is not 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 needed to transmit 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 the copper pipeline, and the energy efficiency of the air conditioning system can be improved by applying the steel pipe to the air conditioning system. However, the existing flame brazing solder is not adhered to a steel pipeline, the flame welding between steel materials can only use silver-containing solder, and the cost of the solder is too high, so that the solder is not suitable for popularization and commercial use.
Disclosure of Invention
The present invention is based on the discovery and recognition by the inventors of the following facts and problems:
in order to solve the above technical problems, as shown in fig. 1 to 3, in the related art, a copper bush is generally added at a steel pipe joint, a first steel pipe 001 is connected with a first copper bush 002, a second steel pipe 003 is connected with a second copper bush 004, and the first copper bush 002 is connected with the second copper bush 004, so that the first steel pipe 001 and the second steel pipe 004 can be connected, but the air-conditioning pipe fitting in the related art often has the following problems:
the existing flame brazing welding flux is not adhered to a steel pipeline, although a copper sleeve is additionally arranged at a steel pipe joint in a welding stage, the steel pipeline is low in heat conductivity, the heat dissipation effect is slower than that of the copper pipeline, the temperature of the joint of the copper sleeve and the steel pipeline is higher during welding, the surplus welding flux 005 is not easy to solidify, the permeable position is too long, the surplus welding flux is difficult to attach to the inner wall of the steel pipe, and the surplus welding flux is easy to flow into a system along the wall of the steel pipe, so that the system is damaged.
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the embodiment of the invention provides the air conditioner pipe fitting which is low in welding difficulty, good in reliability, low in leakage risk and low in fracture risk. The embodiment of the invention also provides an air conditioning pipeline with the air conditioning pipe fitting and an air conditioner with the air conditioning pipeline.
An air conditioning duct according to an embodiment of the present invention includes: a steel tube comprising a first end and a second end; the copper pipe is connected with the first end part, a liquid storage tank is constructed between the copper pipe and the first end part or a liquid storage tank is formed in the copper pipe, and the opening of the liquid storage tank faces the direction far away from the second end part 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 the redundant welding flux 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 the joint of the steel pipe is connected with the copper pipe, and the connecting pipe extends 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 line, the welding process is easy to realize, and the welding difficulty of the air conditioner pipe fitting and the connecting pipe is reduced. In 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 flash, and the system is not 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 conditioning 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 portion, a portion of the first end portion forms a first necking structure, the first end portion includes a connecting section, a first transition section and a first necking section which are sequentially connected in an extending direction of the first end portion, the connecting section is further used for being connected with the rest portion of the steel pipe, the connecting section is connected with the copper pipe, and the liquid storage tank is formed between an outer circumferential surface of the first necking section and an inner circumferential surface of the copper pipe.
In some embodiments, the copper pipe is sleeved on the first end portion, a part of the first end portion forms a first necking structure, the first end portion includes a connecting section and a bending section which are sequentially connected in an extending direction of the first end portion, the connecting section is further used for being connected with the rest part 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 first end portion in an axial direction 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 pipe.
In some embodiments, the copper tube is a straight tube.
In some embodiments, 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 includes 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 tank is formed between the inner circumferential surface of the rest of the pipe section of the copper pipe and the outer circumferential 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 portion, the first end portion is sleeved on the third end portion, and the reservoir is formed in the copper tube.
In some embodiments, an inward flange is formed at the third end, the flange forming the reservoir with the inner circumferential surface of the copper tube.
According to another aspect of the present invention, there is provided an air conditioning pipeline, including the air conditioning pipe fitting and the connecting pipe provided according to any one of the above embodiments of the present invention, wherein one end of the connecting pipe extends into the copper pipe and is welded to the copper pipe, and the reservoir is used for receiving the solder 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 present invention, there is provided an air conditioner including an air conditioning circuit according to any one of the above embodiments of the present 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 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 duct in the related art.
Fig. 4 is a schematic structural diagram of an air conditioning pipe fitting 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 fitting according to the first embodiment of the present invention.
Fig. 7 is a schematic structural diagram of an air conditioning pipe fitting in the second embodiment of the present invention.
Fig. 8 is a schematic structural diagram of an air conditioning pipeline in the second embodiment of the present invention.
Fig. 9 is a schematic structural diagram of an air conditioning pipe fitting in the third embodiment of the present invention.
Fig. 10 is a schematic structural diagram of an air conditioning pipeline in the third embodiment of the present invention.
Fig. 11 is a schematic structural diagram of an air-conditioning pipe fitting in the fourth embodiment of the present invention.
Reference numerals:
a first steel pipe 001; a first copper jacket 002; a second steel pipe 003; a second copper sleeve 004; a solder material 005; air conditioning pipe fittings 100; a steel pipe 110; a first end portion 111; a connecting section 112; a first transition section 113; a first throat section 114; a bending section 115; a connection pipe 120; a fourth end 121; a copper pipe 130; a third end 131; a second throat section 132; a second transition segment 133; a flange 134; a reservoir 140; and (6) 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 with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
An air conditioning duct assembly 100 according to an embodiment of the present invention is described below with reference to fig. 4-11. The air conditioning pipe fitting 100 includes a steel pipe 110 and a copper pipe 130.
The steel pipe 110 includes a first end 111 and a second end (not shown). It can be 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 pipe 130 is connected to the first end 111 of the steel pipe 110, and a sump 140 is formed between the copper pipe 130 and the first end 111 of the steel pipe 110, or a sump 140 is formed in the copper pipe 130. That is, the liquid storage tank 140 may be constructed by the copper pipe 130 and the first end 111 of the steel pipe 110, or may be constructed by the copper pipe 130. For example, the copper pipe 130 is fitted over the first end portion 111 of the steel pipe 110, and an inner circumferential surface of the copper pipe 130 and an outer circumferential surface of the first end portion 111 of the steel pipe 110 are spaced apart from each other to define a reservoir 140. When the sump 140 is constructed by the copper tube 130, the sump 140 is located inside the copper tube 130. And the opening of the sump 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 pipe 130 is used for welding with other pipes of the air conditioner, such as the connection pipe 120, and the reservoir 140 is used for receiving the solder for welding the copper pipe 130 with the connection pipe 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 be welded to the inner wall of the copper tube 130. At least a portion of the fourth end 121 of the connection tube 120 is located in the sump 140. That is, the copper tube 130 is sleeved on the fourth end portion 121 of the connecting tube 120, and at least a portion of the fourth end portion 121 of the connecting tube 120 extends into the sump 140 from the opening of the sump 140, and the end (free end) of the fourth end portion 121 of the connecting tube 120 is located in the sump 140. It will be appreciated that the opening of the sump 140 is oriented opposite the direction of the insertion of the connecting tube 120, and the sump 140 faces the fourth end 121 of the connecting tube 120 so that the fourth end 121 of the connecting tube 120 can be inserted into the sump 140 from the opening of the sump 140. Alternatively, the fourth end 121 of the connecting tube 120 may also be positioned above the sump 140, i.e., the fourth end 121 of the connecting tube 120 does not actually extend into the sump 140. Preferably, at least a portion of the fourth end 121 of the connection tube 120 is located in the sump 140.
The fourth end 121 of the connecting tube 120 is a copper tube segment. The fourth end portion 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 portion 121 of the connection pipe 120 and the copper pipe 130 in a radial direction of the copper pipe 130 to connect the fourth end portion 121 of the connection pipe 121 and the copper pipe 130, and the remaining portion of the solder 200 is filled in the reservoir 140. Here, the solder 200 between the fourth end 121 of the connection tube 120 and the copper tube 130 plays a role of an actual connection, and the length thereof in the extending direction of the fourth end 121 of the connection tube 120 is "soldering depth". The remaining part of the solder 200, i.e., the solder 200 that is left when the fourth end 121 of the connecting pipe 120 and the copper pipe 130 are soldered, finally flows into the reservoir 140 without further penetrating into the pipe 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 connected with a copper pipe, which is not limited herein.
When manufacturing the air conditioning pipe fitting according to the embodiment of the present invention, the copper pipe 130 and the steel pipe 110 may be welded in advance, that is, the copper pipe 130 may be welded to the first end 111 of the steel pipe 110 first, and only the flame welding needs to be performed on the spot to weld 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 the redundant welding flux 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 the joint of the steel pipe is connected with the copper pipe, and the connecting pipe extends 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 line, the welding process is easy to realize, and the welding difficulty of the air conditioner pipe fitting and the connecting pipe is reduced. In 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 flash, and the system is not damaged.
In addition, in the process that the connecting pipe stretches into the copper sheathing, the bottom of reservoir can restrict the degree of depth of stretching into of connecting pipe to the welding depth of control connecting pipe effectively and make the welding depth of connecting pipe keep in reasonable range, reduce the risk of revealing of interior liquid of pipeline. And the welding flux condensed 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 sump 140 is annular.
In some embodiments, the first end 111 of the steel pipe 110, the fourth end 121 of the connection pipe 120, and the copper pipe 130 have the same radial direction 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 following description will be given taking the first end 111 of the steel tube 110, the fourth end 121 of the connecting tube 120, and the extending direction of the copper tube 130 as examples along the left-right direction, and as shown in fig. 4, the first end 111 of the steel tube 110 is the right end of the steel tube 110, the fourth end 121 of the connecting tube 120 is the left end of the connecting tube 120, the opening direction of the reservoir 140 faces to the right, and the fourth end 121 of the connecting tube 120 extends into the reservoir 140 from the right to the left.
Several embodiments provided by the present invention are described in detail below with reference to fig. 4-11 as examples.
The first embodiment is as follows:
the air-conditioning pipe fitting provided by the 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 portion of the first end 111 of the steel pipe 110 is formed with a first necking structure, which includes 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 throat section 114 with the rest of the first end 111 of the steel tube 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 throat section 114, which are sequentially connected in the extending direction (left-right direction) thereof. The connecting segment 112 is also used to connect with the rest of the steel duct 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 are sequentially connected to form the 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 connecting section 112 is connected to the copper tube 130. As shown in fig. 4, the copper pipe 130 is a straight pipe, the diameter of the first necking section 114 is smaller than that of the connecting section 112, and a liquid storage tank 140 is formed between the outer circumferential surface of the first necking section 114 and the inner circumferential surface of the copper pipe 130. The inner peripheral surface of the copper pipe 130 here is the inner peripheral surface of a portion opposed to the first constricted section 114 in the radial direction thereof.
As shown in fig. 4, the opening of the sump 140 is to the right, and the first transition section 113 is the bottom of the sump 140. The length of the first necking section 114 is the tank height h of the liquid storage tank 140, and the distance between the outer circumferential surface of the first necking section 114 and the inner circumferential surface of the copper pipe 130 in the radial direction of the copper pipe 130 is the tank width w of the liquid storage tank 140. The depth direction of the sump 140 coincides with the axial direction of the copper pipe 130, i.e., in the left-right direction.
Optionally, the groove height h ranges from 3mm to 5 mm. In the embodiment shown in fig. 4, the copper tube 130 is partially sleeved on the steel tube 110, and 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 part 114 and the right end surface of the copper tube 130 may be flush.
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 length of the connecting section 112 is 3mm-10 mm.
As shown in fig. 5, when the air conditioning pipe fitting provided in this 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 sump 140. This part of the fourth end 121 of the connecting tube 120 is located radially of the copper tube 130 between the copper tube 130 and the first necked down section 114, radially coinciding with the copper tube 130 and the first necked down section 114.
Further, the first transition section 113 has a certain length in the left-right direction, 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, and the diameter of the first transition section 113 is gradually reduced from left to right. This is provided to reduce the influence of stress concentration on the structural strength of the steel pipe 110, and to 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 2mm 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 111 of the steel pipe 110, i.e., perpendicular to the left-right direction.
As shown in fig. 5, there is a welding between the fourth end 121 of the connection pipe 120 and the copper pipe 130 in a 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 penetrates into the welding seam from the right end of the welding seam, the unsolidified solder 200 flows leftwards along the welding seam until the welding seam is completely filled, and then the redundant solder 200 is converged into the liquid storage tank 140 on the left side of the welding seam, is stored in the liquid storage tank 140 and is solidified, so that the phenomenon that the redundant solder 200 continuously penetrates into the steel pipe 110 along the steel pipe 110 to damage the system is avoided.
In addition, the first transition section 113 may position the connection tube 130 to maintain the weld depth of the connection tube 130 within a reasonable range. The portion of the fourth end portion 121 of the connection pipe 120, which is located in the sump 140, is in double contact with the solder 200 in the sump 140, that is, both the inner circumferential surface and the outer circumferential surface of the portion are in contact with the solder 200, and the end (left end) of the fourth end portion 121 of the connection pipe 120 is buried in the solder 200, so that the connection reliability of the connection pipe 120 and the copper pipe 130 is improved, and the risk of breakage of the pipeline is effectively reduced.
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 not include the first necking section 114, and as shown in fig. 6, the first end 111 of the steel pipe 110 includes the connecting section 112 and the bending section 115 connected to each other. It can be understood that the bending segment 115 is equivalent to the first transition segment 113 in fig. 4, and the diameter of the bending segment 115 gradually decreases from left to right. 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, optionally, θ is greater than or equal to 30 ° and less than or equal to 90 °.
A liquid storage groove 140 is formed between the outer peripheral surface of the bending section 115 and the inner peripheral surface of the copper pipe 130. As shown in fig. 6, the length of the bending segment 115 in the left-right direction is the height h of the reservoir 140. Optionally, the groove height h is equal to or greater than 3mm and equal to or less than 5 mm. Further alternatively, 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.
Example two:
the air-conditioning duct 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 configuration comprising a second necked down section 132 and a second transition section 133. In the present embodiment, the third end 131 of the copper tube 130 is the left end, and the left portion of the third end 131 of the copper tube 130 forms a second necking structure.
The second throat section 132 is connected to the first end 111 of the steel pipe 110. The second transition section 133 is used for connecting the second necking section 132 and the remaining portion of the tube section of the copper tube 130, i.e. the second transition section 133 is located between and connected to each of the second necking section 132 and the remaining portion of the tube section of the copper tube 130 in the extending direction of the copper tube 130. It can be understood that the diameter of the second necking section 132 is smaller than the diameter of the rest section of the copper pipe 130, a sump 140 is formed between the inner circumferential surface of the rest section of the copper pipe 130 and the outer circumferential surface of the steel pipe 110, the opening of the sump 140 faces to the right, and the second transition section 133 is the bottom of the sump 140. Here, the inner circumferential surface of the remaining portion of the tube segment of the copper pipe 130 is the inner circumferential surface of the portion of the copper pipe 130 which is opposed to the steel pipe 110 in the radial direction thereof, and the length of this portion of the copper pipe 130 is the tank height h of the sump 140. The distance between the inner circumferential surface of the remaining portion of the copper pipe 130 and the outer circumferential surface of the steel pipe 110 in the radial direction of the copper pipe 130 is the groove width w of the sump 140. The depth direction of the sump 140 coincides with the axial direction of the copper pipe 130, i.e., in the left-right direction.
Optionally, the groove height h ranges from 3mm to 5 mm. In the embodiment shown in fig. 7, the copper tube 130 is partially sleeved on the steel tube 110, and 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 and the right end surface of the copper tube 130 may be flush.
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 throat section 132 has a length of 3mm to 10 mm.
As shown in fig. 8, the fourth end 121 of the connecting tube 120 extends from right to left into the copper tube 130 until a portion of the fourth end 121 of the connecting tube 120, which is located between the copper tube 130 and the first end 111 of the steel tube 110 in the radial direction of the copper tube 130 and radially overlaps the first end 111 of the copper tube 130 and the steel tube 110, extends into the sump 140.
Further, the second transition section 133 has a certain length in the left-right direction, 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 thereof, and the diameter of the second transition section 133 gradually expands from left to right. The reason for this is to reduce the influence of the stress concentration on the structural strength of the copper pipe 130, and to ensure the structural strength of the copper pipe 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 pipe 130, i.e., perpendicular to the left-right direction.
As shown in fig. 8, there is a welding between the fourth end 121 of the connection pipe 120 and the copper pipe 130 in a 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 penetrates into the welding seam from the right end of the copper pipe 130, the unsolidified solder 200 flows leftwards along the welding seam until the welding seam is completely filled, and then the redundant solder 200 is converged into the liquid storage tank 140 on the left side of the welding seam and is stored and solidified in the liquid storage tank 140, so that the situation that the redundant solder 200 continuously penetrates into the steel pipe 110 along the steel pipe 110 to damage the system is avoided.
Further, as shown in fig. 8, the second transition segment 133 may position the connection tube 130 to maintain the weld depth of the connection tube 130 within a reasonable range. The portion of the fourth end portion 121 of the connection pipe 120, which is located in the sump 140, is in double contact with the solder 200 in the sump 140, that is, both the inner circumferential surface and the outer circumferential surface of the portion are in contact with the solder 200, and the end (left end) of the fourth end portion 121 of the connection pipe 120 is buried in the solder 200, so that the connection reliability of the connection pipe 120 and the copper pipe 130 is improved, and the risk of breakage of the pipeline is effectively reduced.
Example three:
the air-conditioning duct 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 liquid storage tank 140 is formed in the copper tube 130, that is, the liquid storage tank 140 is formed inside 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 sump 140 is formed between the flange 134 and the inner circumferential surface of the copper tube 130. The reservoir 140 opens to the right. The fourth end 121 of the connecting tube 120 extends from right to left into the copper tube 130 and into the sump 140 along the inner wall surface of the copper tube 130. The flange 131 may serve as a bottom of the reservoir 140 and may abut against the fourth end 121 of the connecting tube 120 so as 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 sump 140. Optionally, the groove height h ranges from 3mm to 5mm, and preferably the groove height h is 3 mm.
Alternatively, as shown in fig. 9, the angle between the burring 134 and the inner circumferential surface of the copper pipe 130 is θ, and alternatively, θ is equal to or greater than 30 ° and equal to or less than 90 °. Preferably, the angle θ between the burring 134 and the inner circumferential surface of the copper pipe 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 connection tube 120.
Optionally, the first end 111 of the steel pipe 110 has a length of 3mm to 10 mm.
In this embodiment, the flange 134 is formed at the leftmost side of the copper tube 130. It is understood that in other embodiments, the sump 140 may be formed at any position on the inner circumferential surface of the copper pipe 130, and the formation manner of the sump 140 inside the copper pipe 130 is not limited to the burring 134 in this embodiment. As an example, a liquid tank body is connected to the inner circumferential surface of the copper pipe 130, and the liquid tank body extends inwardly for a certain distance from the connection position of the liquid tank body and the inner circumferential surface of the copper pipe 130, and then extends rightward for a certain distance, so that a liquid tank 140 having a rightward opening is formed between the liquid tank body and the inner circumferential surface of the copper pipe 130.
Example four:
the air-conditioning duct 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 pipe 130 is sleeved on the first end 111 of the steel pipe 110, and a portion of the first end 111 of the steel pipe 110 is formed with a first necking structure, which includes 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 throat section 114 with the rest of the first end 111 of the steel tube 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 throat section 114, which are sequentially connected in the extending direction (left-right direction) thereof. The connecting segment 112 is also used to connect with the rest of the steel duct 110.
A portion of the third end 131 of the copper tube 130 forms a second necked down configuration comprising a second necked down section 132 and a second transition section 133. In the present embodiment, the third end 131 of the copper tube 130 is the left end, 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 for connecting the second necking section 132 and the remaining portion of the tube section of the copper tube 130, i.e. the second transition section 133 is located between and connected to each of the second necking section 132 and the remaining portion of the tube section of the copper tube 130 in the extending direction of the copper tube 130.
The connecting section 112 of the steel pipe 110 is connected to the second necking section 132 of the copper pipe 130. A sump 140 is formed between the inner peripheral surface of the remaining portion of the copper pipe 130 and the first reduced section 114, and the opening of the sump 140 faces the right. As shown in fig. 11, the length of the first reduced-diameter section 114 is the height h of the sump 140, and the distance between the outer circumferential surface of the first reduced-diameter section 114 and the inner circumferential surface of the remaining section of the copper pipe 130 in the radial direction of the copper pipe 130 is the width w of the sump 140.
Optionally, the groove height h ranges from 3mm to 5 mm. 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.
Optionally, the connecting section 112 and the second necking section 132 have the same length, and the length may be 3mm to 10 mm.
When the air conditioning pipe fitting of this embodiment is connected to the connecting pipe 120, the fourth end 121 of the connecting pipe 120 may extend into the copper pipe 130 from right to left until a portion of the fourth end 121 of the connecting pipe 120 extends into the liquid storage tank 140.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer 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, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (12)
1. An air conditioning duct, comprising:
a steel tube comprising a first end and a second end;
the copper pipe is connected with the first end part, a liquid storage tank is constructed between the copper pipe and the first end part or a liquid storage tank is formed in the copper pipe, and the opening of the liquid storage tank faces the direction far away from the second end part 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 part of the first end portion forms a first throat structure, the first end portion comprises a connecting section, a first transition section and a first throat section which are sequentially connected in the extending direction of the first end portion, the connecting section is further used for being connected with the rest part of the steel pipe, the connecting section is connected with the copper pipe, and the liquid storage tank is formed between the outer circumferential surface of the first throat section and the inner circumferential surface of the copper pipe.
4. The air conditioner pipe fitting of 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 comprises a connecting section and a bending section which are sequentially connected in the extending direction of the first end portion, the connecting section is further used for being connected with the rest portion 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 first end portion in the axial direction so that the liquid storage tank is formed between the outer circumferential surface of the bending section and the inner circumferential 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 tank is formed between the inner circumferential surface of the rest of the pipe section of the copper pipe and the outer circumferential surface of the steel pipe.
7. An air conditioning duct according to claim 6, wherein the first end is a straight tube.
8. An air conditioning duct as recited in claim 1, wherein said copper tube includes a third end, said first end being disposed about said third end, said reservoir being formed within said copper tube.
9. An air conditioning pipe fitting according to claim 8, wherein an inward flange is formed at the third end, and the reservoir is formed between the flange and the inner circumferential surface of the copper pipe.
10. An air conditioning circuit, comprising:
air conditioning tubing according to any one of claims 1-9; and
and one end part of the connecting pipe extends into the copper pipe and is welded with the copper pipe, and the liquid storage tank is used for bearing the welding flux welded between the copper pipe and the connecting pipe.
11. An air conditioning circuit according to claim 10, wherein at least a portion of said end of said connecting tube is located in said reservoir or said end of said connecting tube is located above an opening of said reservoir.
12. An air conditioner characterized by comprising an air conditioning circuit according to claim 10 or 11.
Priority Applications (2)
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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)
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CN202110430510.2A CN113236879B (en) | 2021-04-21 | 2021-04-21 | Air conditioner pipe fitting, air conditioner pipeline and air conditioner |
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CN113236879A true CN113236879A (en) | 2021-08-10 |
CN113236879B CN113236879B (en) | 2023-07-28 |
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WO2022222549A1 (en) * | 2021-04-21 | 2022-10-27 | 广东美的暖通设备有限公司 | Air conditioner pipe fitting, air conditioner pipeline, and air conditioner |
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WO2023169250A1 (en) * | 2022-03-08 | 2023-09-14 | 浙江盾安人工环境股份有限公司 | Valve body soldering system and valve body soldering method |
WO2024021415A1 (en) * | 2022-07-26 | 2024-02-01 | 含山瑞可金属有限公司 | Combined pipe fitting and air conditioning system pipeline |
WO2024139186A1 (en) * | 2022-12-28 | 2024-07-04 | 日丰企业(佛山)有限公司 | Welded quick-connect fitting, piping system, and pipeline connection method |
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CN113236879B (en) | 2023-07-28 |
WO2022222549A1 (en) | 2022-10-27 |
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