CN111089202A - Sealing method of refrigeration system pipeline - Google Patents
Sealing method of refrigeration system pipelineDownload PDFInfo
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- CN111089202A CN111089202ACN201910252206.6ACN201910252206ACN111089202ACN 111089202 ACN111089202 ACN 111089202ACN 201910252206 ACN201910252206 ACN 201910252206ACN 111089202 ACN111089202 ACN 111089202A
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- sealing
- glue
- sealing device
- storage cavity
- butt joint
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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-disconnectable pipe joints, e.g. soldered, adhesive, or caulked joints
- F16L13/10—Adhesive or cemented joints
- F16L13/11—Adhesive or cemented joints using materials which fill the space between parts of a joint before hardening
- F16L13/116—Adhesive or cemented joints using materials which fill the space between parts of a joint before hardening for socket pipes
- 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-disconnectable pipe joints, e.g. soldered, adhesive, or caulked joints
- F16L13/10—Adhesive or cemented joints
- F16L13/103—Adhesive joints
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Joints With Sleeves (AREA)
Abstract
Translated fromChinese
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a method for sealing a pipeline of a refrigeration system.
Background
The existing refrigerator generally adopts a vapor compression type refrigeration, the refrigeration system generally comprises a compressor, a condenser, a capillary tube, an evaporator and the like, the compressor, the condenser, the capillary tube, the evaporator and the like are connected into a sealed system through pipelines, and a refrigerant is subjected to phase change inside to release heat and absorb heat to refrigerate. The sealing performance is particularly important for the whole refrigerating system, once the refrigerant leaks, the refrigerating performance is influenced, and in addition, the existing flammable refrigerant is used, and certain potential safety hazard is also brought.
The sealing of the existing refrigerating system pipeline is generally realized by adopting a flame brazing or Rockwell ring connection mode. Wherein flame brazing is comparatively strict to operating personnel's operation level requirement, and the production line has many personnel to weld moreover generally, and holistic uniformity can not fine assurance, and more importantly welds and need use the kindling, has certain hidden danger to the safety of production. The key principle of the rock ring connection is mechanical extrusion contact and the sealing liquid is matched to seal a gap between two connecting pipes so as to achieve a sealing effect. However, a special operation tool is required for the compression of the rock ring, a special space is required to be reserved for operation, and the occupied space is large; and the rock ring is used in cooperation with sealing liquid after being compressed, so that the number of working procedures is large.
Disclosure of Invention
In view of the above, it is an object of the present invention to provide a method of sealing a refrigeration system line that overcomes or at least partially solves the above mentioned problems.
A further object of the present invention is to ensure the uniformity of the sealing of the pipeline and to improve the quality of the sealing.
The invention provides a sealing method of a refrigerating system pipeline, wherein the pipeline comprises an inner inserting pipe and an outer sleeve pipe, and the sealing method comprises the following steps:
inserting the inner cannula into the outer cannula to dock the two;
injecting the sealant into a sealant storage cavity of the sealing device;
and covering the butt joint of the inner inserting tube and the outer sleeve by using a sealing device with glue.
Optionally, after the step of covering the butt joint of the inner cannula and the outer cannula with the sealing device with glue, the method further comprises:
and standing the sealing device for a preset time to cure the sealing glue.
Optionally, the sealant comprises a main agent and a curing agent;
the step of injecting the sealant into the sealant storage cavity of the sealing device comprises the following steps:
and mixing the main agent and the curing agent at the double-glue-outlet gun heads according to a preset weight ratio by using a glue injection gun with the double-glue-outlet gun heads, aligning the double-glue-outlet gun heads to the glue storage cavity, and injecting the mixed main agent and the curing agent into the glue storage cavity.
Optionally, the preset weight ratio is 3: 1 to 5: 1.
optionally, before the step of covering the butt joint of the inner cannula and the outer cannula with the sealing device with glue, the method further comprises:
detecting whether the butt joint of the inner inserting tube and the outer sleeve is clean;
and if the butt joint is stained, cleaning the butt joint.
Optionally, when the joint of the inner cannula and the outer cannula is covered by the sealing device with the glue, the joint is positioned in the middle of the glue storage cavity.
Optionally, the sealing device is made of a flexible material.
Optionally, the sealing device is provided with two side wings positioned at two opposite sides of the glue storage cavity, one side wing of the two side wings is provided with a buckle, and the other side wing is provided with a clamping groove which is matched and clamped with the buckle;
the step of coating the butt joint of the inner inserting tube and the outer sleeve by using the sealing device with the glue specifically comprises the following steps:
moving the sealing device to the butt joint of the inner inserting pipe and the outer sleeve pipe, so that the two side wings are positioned on two sides of the extending direction of the pipeline;
and the two side wings are overlapped, and the buckle and the clamping groove are buckled, so that the sealing device is formed into a cylinder shape which is coated on the outer side of the butt joint of the outer sleeve and the inner inserting tube.
Optionally, the glue storage cavity is coated at the butt joint to form a spindle shape.
Optionally, the sealing device further comprises two sealing sections located at two ends of the extending direction of the glue storage cavity;
each sealing section is provided with an arc-shaped groove, and the two side wings extend to two sides of the two arc-shaped grooves respectively;
when two flanks are folded, the two arc-shaped grooves are formed into a cylindrical shape which is wrapped on the peripheral wall of the pipeline and is attached to the peripheral wall of the pipeline.
According to the sealing method for the refrigerating system pipeline, disclosed by the invention, the pipeline of the refrigerating system is sealed by utilizing the sealant and the sealing device, so that various problems caused by adopting flame brazing in the existing refrigerator are avoided, the pipeline is ensured to be uniformly sealed and well sealed, the operation is safe, the sealing process is simplified, and the standardized execution is easy.
Furthermore, in the method for sealing the pipeline of the refrigeration system, the pipeline is sealed by adopting the specially designed sealing device, so that the uniformity of the distribution of the sealant at the butt joint of the pipeline is ensured, and the sealing quality of the pipeline is improved.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic external view of a refrigerant system tube having a sealing device according to one embodiment of the present invention;
FIG. 2 is a partial schematic view of a sealing device according to one embodiment of the invention;
FIG. 3 is a schematic cross-sectional view of a refrigerant system tube with a sealing device according to one embodiment of the present invention;
FIG. 4 is a schematic illustration of a method of sealing a refrigerant system tube according to one embodiment of the present invention; and
fig. 5 is a flow chart of a method of sealing a refrigerant system tube according to one embodiment of the present invention.
Detailed Description
The embodiment provides a sealing method of a refrigeration system pipeline, wherein the refrigeration system is a refrigeration system of refrigeration equipment, and the refrigeration equipment can be equipment with refrigeration and/or freezing functions, such as a refrigerator, an ice chest and the like.
As shown in fig. 1 and 2, the pipeline may include aninner cannula 200 and anouter cannula 100, theinner cannula 200 is inserted into theouter cannula 100 and connected to theouter cannula 100, and in order to seal the connection between theinner cannula 200 and theouter cannula 100, anovel sealing device 300 is used in this embodiment to seal the connection. The butt joint may be a position where the end of theouter sleeve 100 butt jointed with theinner cannula 200 coincides with theinner cannula 200.
Specifically, as shown in fig. 2 and fig. 3, thesealing device 300 has aglue storage cavity 310 for containing thesealing glue 101 and twoside wings 320 located at opposite sides of theglue storage cavity 310, oneside wing 320 of the twoside wings 320 is formed with abuckle 321, and theother side wing 320 is formed with aclamping groove 322 adapted to be clamped with thebuckle 321.
After thesealant 101 is injected into thesealant storage cavity 310, thesealing device 300 is moved to the joint between theinner cannula 200 and theouter cannula 100, so that the twoside wings 320 are located at two sides of the pipeline extending direction; and the twoside wings 320 are overlapped, and thebuckle 321 is buckled with theclamping groove 322, so that thesealing device 300 is formed into a cylindrical shape which is coated outside the joint of theouter sleeve 100 and theinner cannula 200.
Thesealing device 300 may be made of a flexible material, such as plastic, to ensure a certain flexibility of the sealing device, facilitating the folding of the twolateral wings 320.
Fig. 1 is a view showing a state where thesealing device 300 is wrapped around the outside of the pipeline after thesealant 101 is injected into thesealant storage chamber 310 and thesealing device 300 is folded, fig. 2 is a partial schematic view showing a state where thesealing device 300 is unfolded, and fig. 3 is a schematic cross-sectional view showing thesealing device 300 wrapped around the outside of the pipeline.
The central line of the extending direction of theglue storage cavity 310 is parallel to the extending direction of the pipeline, and the dimension of the extending direction of theglue storage cavity 310 can be larger than the dimension of the joint of theouter sleeve 100 and theinner insert tube 200, as shown in fig. 1 and 3, the dimension of the extending direction of theglue storage cavity 310 is much larger than the dimension of the joint, so as to ensure the volume of theglue storage cavity 310, and ensure the volume of thesealant 101 injected into theglue storage cavity 310 and the distribution area of thesealant 101 at the outer peripheral wall of theouter sleeve 100, the outer peripheral wall of theinner insert tube 200, and the joint of theouter sleeve 100 and theinner insert tube 200, so as to.
The size ofglue storage cavity 310 is from middle to its extending direction's both ends convergent, can make the regional size in middle part ofglue storage cavity 310 the biggest from this, can deposit more sealed glue, and the size at the both ends ofglue storage cavity 310 is less, is convenient for match with the periphery wall of pipeline to guarantee the leakproofness. For example, as shown in fig. 1 and fig. 3, theglue storage chamber 310 may be formed into a spindle shape at the joint where the glue storage chamber is covered, so as to ensure uniformity of thesealant 101 in the circumferential direction of the same region of the pipeline.
As shown in fig. 3, thesealing device 300 further has twosealing sections 330 located at two ends of theglue storage cavity 310 in the extending direction, eachsealing section 330 has an arc-shaped groove, the twoside wings 320 extend to two sides of the two arc-shaped grooves respectively, when the twoside wings 320 are overlapped, the two arc-shaped grooves can be formed into a cylindrical shape wrapped on the outer peripheral wall of the pipeline, and the inner peripheral wall of thesealing section 330 formed into the cylindrical shape is attached to the outer peripheral wall of the pipeline.
That is, theseal segment 330 at one end of thesealing device 300 is formed in a cylindrical shape that is fitted around the outer peripheral wall of theouter sleeve 100, and the inner peripheral wall of thecylindrical seal segment 330 is fitted to the outer peripheral wall of theouter sleeve 100, and correspondingly, theseal segment 330 at the other end of thesealing device 300 is formed in a cylindrical shape that is fitted around the outer peripheral wall of theinner cannula 200, and the inner peripheral wall of thecylindrical seal segment 330 is fitted to the outer peripheral wall of theinner cannula 200. Therefore, by adding the twosealing sections 330 with the special design, the sealing performance of the two ends of thesealing device 300 and the peripheral wall of the pipeline is ensured, and the sealingglue 101 is prevented from leaking. Moreover, the arc surface of thesealing section 330 can be uniformly attached to the outer peripheral wall of the pipeline, so that thesealant 101 at the joint of theinner insertion tube 200 and theouter sleeve 100 is uniformly distributed all around, the risk of local sealant shortage is avoided, and the sealing performance of the pipeline is further ensured.
Thesealant 101 is a two-component polyurethane adhesive, which is an adhesive containing urethane groups (-NHCOO-) in the molecular chain and generated by the addition polymerization of isocyanate and polyether or polyester polyol. Thesealant 101 comprises a main agent and a curing agent, wherein the main agent is polyol, and the curing agent is isocyanate containing isocyanate group (-NCO). The main agent and the curing agent are mixed and then are cured by addition polymerization to form the thermosetting plastic or elastomer. Thesealant 101 has the advantages of high bonding strength, quick curing, high peel strength, impact resistance, vibration resistance, good fatigue resistance, high temperature resistance, good oil resistance, good solvent resistance and good weather resistance, easy storage, on-site glue mixing, simple process and high production efficiency.
Fig. 4 is a schematic diagram of a method of sealing a refrigerant system tube according to one embodiment of the present invention.
As shown in fig. 4, based on the refrigeration system pipeline and thesealing device 300, the method for sealing a refrigeration system pipeline of the present embodiment specifically includes:
step S402, inserting theinner cannula 200 into theouter cannula 100 to butt the two;
step S404, injecting thesealant 101 into thesealant storage cavity 310 of thesealing device 300;
in step S406, the joint between theinner tube 200 and theouter tube 100 is covered with thesealing device 300 with glue.
When the joint of theinner cannula 200 and theouter cannula 100 is covered by thesealing device 300 with glue, the joint can be located in the middle of theglue storage cavity 310, so that the upstream area and the downstream area of the joint are substantially the same as the area covered by theglue storage cavity 310, which is beneficial to improving the sealing effect.
The sealing method can be implemented by a robot in combination with the image recognition method, specifically, the robot inserts theinner cannula 200 into theouter cannula 100 to a certain depth, and then theinner cannula 200 is inserted into theouter cannula 100 to be butted with theouter cannula 100, and the depth of theinner cannula 200 into theouter cannula 100 may be greater than 5mm, for example, 8mm or greater.
Meanwhile, the glue injection gun injects thesealant 101 into theglue storage cavity 310 of thesealing device 300, and the amount of glue injected by the glue injection gun can be preset according to the internal volume of theglue storage cavity 310 of thesealing device 300, thereby being beneficial to standardized execution.
The image recognition apparatus automatically recognizes the position of the junction of theouter sleeve 100 and theinner sleeve 200, transmits the position information to the robot, moves thesealing apparatus 300 to the pipeline such that the junction of theouter sleeve 100 and theinner sleeve 200 is located at the middle of theglue storage chamber 310 of thesealing apparatus 300, and operates thesealing apparatus 300 such that the sealingapparatus 300 covers the junction of theinner sleeve 200 and theouter sleeve 100.
After the joint between theinner tube 200 and theouter tube 100 is covered with thesealing device 300, thesealing device 300 is left for a predetermined time, for example, 6 hours or more, and thesealant 101 is cured.
In this embodiment, thesealant 101 is a two-component polyurethane adhesive containing a main agent and a curing agent, before injecting the sealant, the main agent and the curing agent are separately stored in different containers, and when the sealant is injected into thesealant storage cavity 310 of thesealing device 300, a certain amount of the main agent and a certain amount of the curing agent can be respectively injected into two sealant outlet guns of the sealant injection gun. The step of injecting thesealant 101 into thesealant storage cavity 310 of thesealing device 300 may specifically include:
the main agent and the curing agent are mixed at the double-glue-discharging gun heads according to the preset weight proportion by using the glue-injecting gun with the double-glue-discharging gun heads, the double-glue-discharging gun heads are aligned to theglue storage cavity 310, and the mixed main agent and the mixed curing agent are injected into theglue storage cavity 310.
The preset weight ratio can be 3: 1 to 5: 1, for example, the preset weight ratio is 4: 1.
before the step of covering the butt joint of theinner cannula 200 and theouter cannula 100 by thesealing device 300 with glue, the method further comprises the following steps: and detecting whether the joint of the inner insertingtube 200 and theouter sleeve 100 is clean, and cleaning the joint if stains, oil stains and the like exist in the joint so as to ensure the bonding force between the joint and the sealant. Specifically, the image recognition apparatus recognizes the joint between theinner cannula 200 and theouter cannula 100, collects the image of the joint, and compares the collected image with the standard image, thereby determining whether there is a stain on the joint, and if there is a stain, the image recognition apparatus may control the plasma gun to spray plasma water to the joint, so as to clean the joint and the surrounding area, and then perform the next process. Wherein the standard image is a pre-collected clean image of the butt joint.
Fig. 5 is a flow chart illustrating a method for sealing a refrigerant system circuit according to an embodiment of the present invention.
As shown in fig. 5, the method for sealing a refrigerant system pipe of the present embodiment includes:
step S502, inserting theinner cannula 200 into theouter cannula 100 to butt the two;
step S504, detecting whether the joint between theinner cannula 200 and theouter cannula 100 is clean, if the joint is clean, switching to step S508, and if the joint is dirty, switching to step S506;
step S506, cleaning the butt joint;
step S508, the main agent and the curing agent are mixed by a glue injection gun with double glue-out gun heads according to the ratio of 4: 1, mixing at a double-glue-discharging gun head, aligning the double-glue-discharging gun head to aglue storage cavity 310, and injecting a mixed main agent and a mixed curing agent into theglue storage cavity 310;
step S510, moving thesealing device 300 to the joint of theinner cannula 200 and theouter cannula 100, so that the joint is located in the middle of theglue storage cavity 310, and the twoside wings 320 are located on the two sides of the pipeline extending direction;
step S512, overlapping the twoside wings 320, and fastening thebuckle 321 with the clampinggroove 322, so that thesealing device 300 is formed into a cylinder shape covering the outer side of the butt joint of theouter sleeve 100 and theinner sleeve 200;
and step S514, standing thesealing device 300 for 10min to cure thesealant 101.
In the embodiment, the specially designedsealing device 300 is matched with the specially designed sealing process, so that the pipeline is well sealed by thesealant 101, a plurality of problems caused by flame brazing in the existing refrigerator are avoided, the pipeline is guaranteed to be uniformly sealed and well sealed, the operation is safe, the sealing process is simplified, and the standardized execution is easy.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (10)
1. A method of sealing a refrigeration system pipe, the pipe including an inner insert and an outer sleeve, the method comprising:
inserting the inner cannula into the outer cannula to dock the two;
injecting the sealant into a sealant storage cavity of the sealing device;
and covering the butt joint of the inner inserting tube and the outer sleeve by using a sealing device with glue.
2. The sealing method of claim 1, wherein
After the step of covering the butt joint of the inner cannula and the outer cannula by using the sealing device with glue, the method further comprises the following steps:
and standing the sealing device for a preset time to cure the sealing glue.
3. The sealing method of claim 1, wherein
The sealant comprises a main agent and a curing agent;
the step of injecting the sealant into the sealant storage cavity of the sealing device comprises the following steps:
and mixing the main agent and the curing agent at the double-glue-outlet gun heads according to a preset weight ratio by using a glue injection gun with double-glue-outlet gun heads, aligning the double-glue-outlet gun heads to the glue storage cavity, and injecting the mixed main agent and the curing agent into the glue storage cavity.
4. The sealing method of claim 3, wherein
The preset weight ratio is 3: 1 to 5: 1.
5. the sealing method of claim 1, wherein
Before the step of covering the butt joint of the inner inserting tube and the outer sleeve by using a sealing device with glue, the method further comprises the following steps:
detecting whether the joint of the inner inserting tube and the outer sleeve is clean;
and if the butt joint is stained, cleaning the butt joint.
6. The sealing method of claim 1, wherein
When the butt joint of the inner inserting tube and the outer sleeve is covered by a sealing device with glue, the butt joint is located in the middle of the glue storage cavity.
7. The sealing method of claim 1, wherein
The sealing device is made of flexible materials.
8. The sealing method of claim 1, wherein
The sealing device is provided with two side wings positioned at two opposite sides of the glue storage cavity, one side wing of the two side wings is provided with a buckle, and the other side wing is provided with a clamping groove which is matched and clamped with the buckle;
the step of coating the butt joint of the inner inserting tube and the outer sleeve by using the sealing device with the glue specifically comprises the following steps:
moving the sealing device to the interface of the inner cannula and the outer cannula so that the two side wings are located on both sides of the pipeline extending direction;
and overlapping the two side wings, and buckling the buckle with the clamping groove, so that the sealing device is formed into a cylinder shape which is coated outside the butt joint of the outer sleeve and the inner inserting pipe.
9. The sealing method of claim 8, wherein
The glue storage cavity is coated at the butt joint part to form a spindle shape.
10. The sealing method of claim 8, wherein
The sealing device is also provided with two sealing sections positioned at two ends of the extension direction of the glue storage cavity;
each sealing section is provided with an arc-shaped groove, and the two side wings extend to two sides of the two arc-shaped grooves respectively;
when the two side wings are overlapped, the two arc-shaped grooves are formed into a cylindrical shape which is coated on the peripheral wall of the pipeline and is attached to the peripheral wall of the pipeline.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910252206.6ACN111089202B (en) | 2019-03-29 | 2019-03-29 | Sealing method for refrigerating system pipeline |
| PCT/CN2020/072776WO2020199729A1 (en) | 2019-03-29 | 2020-01-17 | Seal method for pipeline of refrigeration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910252206.6ACN111089202B (en) | 2019-03-29 | 2019-03-29 | Sealing method for refrigerating system pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111089202Atrue CN111089202A (en) | 2020-05-01 |
| CN111089202B CN111089202B (en) | 2020-12-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910252206.6AActiveCN111089202B (en) | 2019-03-29 | 2019-03-29 | Sealing method for refrigerating system pipeline |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111089202B (en) |
| WO (1) | WO2020199729A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111928024A (en)* | 2020-09-01 | 2020-11-13 | 无锡伏尔康科技有限公司 | Refrigerating device pipeline connecting structure and evaporator pipeline connecting structure |
| US20230021128A1 (en)* | 2019-12-10 | 2023-01-19 | Basf Se | Assembly of metal pipes with two-component polyurethane adhesive |
| WO2023040291A1 (en)* | 2021-09-15 | 2023-03-23 | 合肥海尔电冰箱有限公司 | Sealing method for refrigeration pipeline, and refrigeration pipeline |
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| US20230021128A1 (en)* | 2019-12-10 | 2023-01-19 | Basf Se | Assembly of metal pipes with two-component polyurethane adhesive |
| CN111928024A (en)* | 2020-09-01 | 2020-11-13 | 无锡伏尔康科技有限公司 | Refrigerating device pipeline connecting structure and evaporator pipeline connecting structure |
| WO2023040291A1 (en)* | 2021-09-15 | 2023-03-23 | 合肥海尔电冰箱有限公司 | Sealing method for refrigeration pipeline, and refrigeration pipeline |
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|---|---|
| CN111089202B (en) | 2020-12-11 |
| WO2020199729A1 (en) | 2020-10-08 |
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