Welding device and welding process for air conditioner distributor and capillary tube

Abstract

The invention discloses a welding device and process for an air conditioner distributor and a capillary tube, and relates to the technical field of automobile air conditioners. The welding device for the air conditioner distributor and the capillary tubes comprises a base, a welding assembly and a positioning assembly, the positioning assembly comprises a positioning disc, the positioning disc is provided with a positioning position, and when the positioning disc is located at the positioning position, the multiple capillary tubes are inserted into the positioning disc. According to the welding device, the multiple capillary tubes can be continuously kept at the correct welding positions and welding angles through the positioning disc on the welding device, and the welding precision and welding quality of the capillary tubes are effectively improved; and meanwhile, the welding degrees of the capillary tubes tend to be consistent, so that the distribution uniformity of the distributor is effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of automobile air conditioning, and in particular to a welding device and a welding process for an air conditioning distributor and a capillary tube. Background Art

[0002] The air conditioning distributor, also known as the liquid distributor, is a refrigerant distribution device that can evenly distribute the refrigerant delivered by the expansion valve to each channel of the evaporator.

[0003] The existing air conditioner distributor is provided with a plurality of liquid separation holes. When the air conditioner distributor is in use, a capillary tube with a diameter of less than Φ5 needs to be welded in each liquid separation hole to output the refrigerant to the outside through the capillary tube.

[0004] However, since the capillary is prone to shaking and deflecting during the welding process, its welding position and welding angle on the distributor will change, which greatly affects the welding accuracy and welding quality between the capillary and the distributor; at the same time, different capillaries may shake and deflect to varying degrees, resulting in inconsistent welding degrees of the capillaries in multiple liquid distribution holes, which seriously affects the distribution uniformity of the distributor. Summary of the invention

[0005] One object of the present application is to overcome the deficiencies of the prior art and to provide a welding device for an air conditioner distributor and a capillary tube capable of positioning a plurality of capillaries.

[0006] The present application provides a welding device that adopts the following technical solution: A welding device for an air-conditioning distributor and a capillary tube, wherein the distributor is hollow and has a plurality of liquid dispensing holes for correspondingly plugging in the capillaries, the welding device comprises a base for supporting the distributor, a welding assembly for relatively welding the plurality of capillaries to the distributor, and a positioning assembly for positioning the plurality of capillaries, the positioning assembly comprising a positioning plate, the positioning plate having a positioning position, and when the positioning plate is in the positioning position, the plurality of capillaries are respectively inserted in the positioning plate.

[0007] By adopting the above technical solution, multiple capillaries can continuously maintain the correct welding position and welding angle under the action of the positioning plate, effectively improving the welding accuracy and welding quality of the capillaries; at the same time, the welding degree of multiple capillaries can be consistent, effectively improving the distribution uniformity of the distributor.

[0008] Preferably, the positioning plate is movably arranged along the length direction of the capillary, and the positioning assembly also includes a first driving member for driving the positioning plate to move, and a plurality of positioning holes spaced apart on the positioning plate, the plurality of positioning holes correspond one-to-one to the plurality of liquid separation holes, and the center line of each positioning hole coincides with the corresponding axial center line of the capillary.

[0009] By adopting the above technical solution, multiple capillaries can be positioned in multiple positioning holes respectively, which effectively improves the positioning effect of the positioning component on the capillaries.

[0010] Preferably, each of the positioning holes is respectively connected with a guide ring, and the guide ring comprises a plurality of guide parts arranged circumferentially around the positioning hole, each of the guide parts is respectively provided with an arc-shaped guide surface, and a clearance groove is respectively provided between two adjacent guide parts.

[0011] By adopting the above technical solution, the arc-shaped guide surface and the clearance groove can reduce the insertion resistance of the capillary and reduce the difficulty of inserting the capillary into the positioning hole, which can not only improve the welding efficiency but also avoid damage to the capillary during the insertion into the positioning hole.

[0012] Preferably, the base is hollow and connected to the distributor, and a gas pipe for inputting inert gas is connected to the base.

[0013] By adopting the above technical solution, the gas pipe can transport inert gas to the liquid separation hole through the distributor, and the inert gas can wrap the welding point between the distributor and the capillary and prevent oxidation of the welding point; at the same time, the inert gas can continuously flush the liquid separation hole, so that the liquid separation hole can remain unobstructed after being welded with the capillary and is not prone to blockage.

[0014] Preferably, the base is cylindrical, comprising a hollow outer base body and an inner base body coaxially arranged in the outer base body, an annular air passage is formed between the outer base body and the inner base body, and the distributor and the air pipe are both connected to the air passage.

[0015] By adopting the above technical solution, the inert gas can spirally move in the annular airway and flow evenly to multiple separation holes after entering the distributor, so that each separation hole can receive sufficient inert gas, effectively avoiding oxidation of the distributor and the capillary, and at the same time, avoiding blockage of the separation holes.

[0016] Preferably, the diameter of the inner seat body gradually decreases along the direction approaching the distributor, the end of the inner seat body away from the distributor is connected to the outer seat body, and the end close to the distributor is a free end, and an air outlet cavity is formed between the free end and the outer seat body, and the air outlet cavity is respectively connected to the airway and the distributor.

[0017] By adopting the above technical solution, the inert gas spirally output from the airway can be collected in the air outlet cavity and quickly enter the distributor from the air outlet cavity, further avoiding oxidation of the distributor and the capillary tube, and further avoiding blockage of the liquid separation hole.

[0018] Preferably, a rotatable turntable and a second driving member for driving the turntable to rotate are provided on the base, the dispenser is carried on the turntable, and the rotation axis of the turntable extends along the axial direction of the dispenser.

[0019] By adopting the above technical solution, the distributor can be continuously rotated during the welding process, which effectively improves the welding uniformity between the distributor and the multiple capillaries.

[0020] Preferably, the welding assembly comprises an electromagnetic coil movably arranged along the length direction of the capillary and a third driving member for driving the electromagnetic coil to move, and the electromagnetic coil can surround the circumference of the dispenser during its moving stroke.

[0021] Preferably, the welding device further comprises a cooling pipe for outputting cooling gas, the end of the cooling pipe has a gas outlet, and the gas outlet is suspended on the side of the distributor.

[0022] By adopting the above technical solution, the welded distributor can be quickly cooled under the action of the cooling pipe, so as to improve the welding efficiency of the distributor.

[0023] Another object of the present application is to provide a welding process for an air conditioning distributor and a capillary tube.

[0024] A welding process provided in this application adopts the following technical solution: A welding process for an air conditioner distributor and a capillary tube, the welding process is based on the above-mentioned welding device, and comprises the following steps: Step 1, placing the distributor on the base, putting solder rings on one end of a plurality of capillaries and inserting the plurality of ends into the plurality of liquid separation holes respectively; Step 2, moving the positioning plate to a positioning position and sleeved on the other ends of the plurality of capillaries; Step 3, welding the joints between the capillary and the liquid separation hole by means of a welding assembly; Step 4. After welding is completed, remove the distributor from the base.

[0025] By adopting the above technical solution, multiple capillaries can continuously maintain the correct welding position and welding angle under the action of the positioning plate, effectively improving the welding accuracy and welding quality of the capillaries; at the same time, the welding degree of multiple capillaries can be consistent, effectively improving the distribution uniformity of the distributor.

[0026] In summary, the present invention includes at least one of the following beneficial technical effects: 1. Multiple capillaries can be continuously maintained at the correct welding position and welding angle under the action of the positioning plate, effectively improving the welding accuracy and welding quality of the capillaries; 2. The welding degree of multiple capillaries can be consistent, which effectively improves the distribution uniformity of the distributor. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural diagram of the welding device in Example 1 of the present application; Figure 2 is a schematic diagram of the partial structure of the welding device in Example 1 of the present application; Figure 3 yes Figure 2 A is an enlarged schematic diagram; Figure 4 yes Figure 2 Schematic diagram of the axial cross section.

[0028] Markings in the accompanying drawings: 1. Base; 11. Outer base; 12. Inner base; 13. Airway; 14. Air outlet cavity; 2. Welding assembly; 21. Electromagnetic coil; 22. Third driving member; 3. Positioning assembly; 31. Positioning plate; 32. First driving member; 33. Positioning hole; 34. Guide ring; 341. Guide part; 342. Displacement groove; 4. Air pipe; 5. Turntable; 6. Second driving member; 7. Cooling pipe; 71. Air outlet; 8. Machine base; 9. Opening; 100. Distributor; 101. Liquid separation hole; 102. Capillary. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-4 The present invention is described in further detail.

[0030] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] Example 1: See Figure 1-4 As shown, a welding device for an air conditioner distributor and a capillary is shown, wherein the distributor 100 is hollow and has a plurality of liquid separation holes 101 for correspondingly plugging in the capillary tubes 102, wherein the top of the distributor 100 is an arc surface, and the plurality of liquid separation holes 101 are arranged on the arc surface, and an inclined connecting pipe is arranged at the lower end of the capillary tube 102, and the connecting pipe can match and dock with the liquid separation holes 101 arranged on the arc surface. The welding device includes a base 8, on which a base 1 for carrying the distributor 100, a welding assembly 2 for welding the plurality of capillaries 102 and the distributor 100 relative to each other, and a positioning assembly 3 for positioning the plurality of capillaries 102.

[0032] In this embodiment, the dispenser 100 is carried on the top of the base 1, and the lower ends of the plurality of capillaries 102 are respectively pre-covered with solder rings and correspondingly inserted into the plurality of liquid dispensing holes 101, wherein the solder ring is a solder processed into a ring shape, which can weld the capillary 102 and the dispenser 100 relative to each other after melting; the positioning component 3 includes a horizontally arranged positioning plate 31 located above the capillary 102, the positioning plate 31 is circular, and the positioning plate 31 has a positioning position, and when the positioning plate 31 is in the positioning position, the upper ends of the plurality of capillaries 102 are respectively inserted into the positioning plate 31; the welding component 2 includes an electromagnetic coil 21, which is a high-frequency coil, which surrounds the circumference of the dispenser 100, and the high-frequency coil can weld the dispenser 100 and the capillary 102 after the power is turned on.

[0033] In this way, when welding the capillary 102 and the distributor 100, the multiple capillaries 102 can continue to maintain the correct welding position and welding angle under the action of the positioning plate 31. At this time, the electromagnetic coil 21 can perform high-frequency welding on the capillary 102 and the distributor 100, which effectively improves the welding accuracy and welding quality of the capillary 102; at the same time, the welding degree of the multiple capillaries 102 can tend to be consistent, which effectively improves the distribution uniformity of the distributor 100.

[0034] In this embodiment, combined with Figure 1 As shown, the positioning plate 31 can be raised and lowered, and the positioning assembly 3 also includes a first driving member 32 provided on the base 8 for driving the positioning plate 31 to be raised and lowered, and a plurality of positioning holes 33 spaced apart on the positioning plate 31, wherein the plurality of positioning holes 33 correspond to the plurality of liquid separation holes 101 one by one, and the center line of each positioning hole 33 coincides with the center line of the corresponding capillary 102. Among them, the first driving member 32 is a linear motor provided along the vertical direction, and the plurality of capillaries 102 can be inserted into the plurality of positioning holes 33 one by one in the lifting stroke of the positioning plate 31, which effectively improves the positioning effect of the positioning assembly 3 on the capillaries 102.

[0035] In this embodiment, combined with Figure 3 As shown, each positioning hole 33 is coaxially connected with a guide ring 34, and the guide ring 34 includes a plurality of guide parts 341 arranged circumferentially around the positioning hole 33, and each guide part 341 is provided with an arc-shaped guide surface, and a clearance groove 342 is provided between two adjacent guide parts 341. The arc-shaped guide surface can increase the smoothness of the capillary 102 passing through the positioning hole 33, and the clearance groove 342 can reduce the contact area between the capillary 102 and the positioning hole 33, thereby reducing the friction between the capillary 102 and the positioning hole 33. The combination of the two can effectively reduce the insertion resistance of the capillary 102 in the positioning hole 33, and reduce the difficulty of the capillary 102 in the positioning hole 33, which can not only improve the welding efficiency, but also prevent the capillary 102 from being damaged during the insertion into the positioning hole 33.

[0036] In this embodiment, combined with Figure 1 and Figure 4 As shown, the base 1 is hollow and its upper end is connected to the distributor 100. The base 1 is connected to a gas pipe 4 for inputting an inert gas. The inert gas is nitrogen, and the end of the gas pipe 4 away from the base 1 is connected to a nitrogen source. During the process of the electromagnetic coil 21 welding the capillary 102 and the distributor 100, the gas pipe 4 can input nitrogen into the base 1. The nitrogen reaches the liquid separation hole 101 after passing through the distributor 100, which can wrap the welding point between the distributor 100 and the capillary 102 and prevent the welding point from being oxidized; at the same time, the nitrogen can continuously flush the liquid separation hole 101 during the flow process to remove the solder that leaks into the liquid separation hole 101, so that the liquid separation hole 101 can still remain unobstructed after the distributor 100 and the capillary 102 are welded, and it is not easy to be blocked.

[0037] In this embodiment, combined with Figure 4 As shown, the base 1 is in an upright cylindrical shape, comprising a hollow outer body 11 and an inner body 12 coaxially arranged in the outer body 11 , an annular air passage 13 is formed between the outer body 11 and the inner body 12 , and the distributor 100 and the air pipe 4 are both connected to the air passage 13 .

[0038] The diameter of the inner seat body 12 gradually decreases from bottom to top. The lower end of the inner seat body 12 is connected to the outer seat body 11, and the upper end is a free end. An air outlet cavity 14 is formed between the free end and the outer seat body 11, and the air outlet cavity 14 is respectively connected to the air channel 13 and the distributor 100. Nitrogen can move upward in a spiral in the annular air channel 13 and gather in the air outlet cavity 14, and then enter the distributor 100 through the air outlet cavity 14 and evenly flow to the multiple liquid separation holes 101, so that each liquid separation hole 101 can receive enough nitrogen, effectively avoiding oxidation of the distributor 100 and the capillary 102, and at the same time, avoiding clogging of the liquid separation hole 101.

[0039] In this embodiment, combined with Figure 1-2 As shown, the base 1 is provided with a turntable 5 that can rotate around the vertical direction, and a second driving member 6 for driving the turntable 5 to rotate, the second driving member 6 is a motor, the distributor 100 is carried on the turntable 5, and the rotation axis of the turntable 5 extends along the axial direction of the distributor 100. The turntable 5 can drive the distributor 100 to rotate continuously during the welding process, so that the distributor 100 can evenly receive the heat of the electromagnetic coil 21, and effectively improve the welding uniformity between the distributor 100 and the plurality of capillaries 102.

[0040] Among them, combined Figure 4 As shown, the turntable 5 is hollow, and openings 9 communicating with the dispenser 100 and the base 1 are respectively provided at both ends thereof.

[0041] In this embodiment, combined with Figure 1 As shown, the electromagnetic coil 21 can be raised and lowered, and the welding assembly 2 also includes a third driving member 22 for driving the electromagnetic coil 21 to rise and fall. The third driving member 22 is a linear motor, and the electromagnetic coil 21 can surround the peripheral side of the dispenser 100 during its lifting stroke. Before welding, the electromagnetic coil 21 surrounds the peripheral side of the base 1. During welding, the electromagnetic coil 21 rises and reaches the dispenser 100, and then the dispenser 100 and the capillary 102 can be welded.

[0042] In this embodiment, the welding device further includes two cooling pipes 7 for outputting cooling gas, and the ends of the cooling pipes 7 have gas outlets 71, and the gas outlets 71 of the two cooling pipes 7 are symmetrically suspended on both sides of the distributor 100. The cooling gas is low-temperature air, and one end of the cooling pipe 7 away from the gas outlet 71 is connected to a cold air source. After welding is completed, low-temperature air is output to the welding position of the distributor 100 through the two cooling pipes 7, so that the welded distributor 100 can be quickly cooled, thereby improving the welding efficiency of the distributor 100.

[0043] Embodiment 2: This embodiment discloses a welding process of the welding device of the air conditioner distributor and the capillary tube based on Embodiment 1, and the welding process comprises the following steps: Step 1, place the distributor 100 on the turntable 5, put solder rings on the lower ends of the multiple capillaries 102 and insert the multiple lower ends into the multiple liquid separation holes 101 respectively; wherein, when inserting, keep the multiple capillaries 102 in a vertical state.

[0044] Step 2, start the first driving member 32 to move the positioning plate 31 downward to the positioning position, and the upper ends of the plurality of capillaries 102 are respectively inserted into the plurality of positioning holes 33 during the descending process of the positioning plate 31.

[0045] At the same time, the second driving member 6 is started, and the turntable 5 drives the dispenser 100 to rotate continuously.

[0046] Step 3, start the third driving member 22 to move the electromagnetic coil 21 upward to the peripheral side of the distributor 100, and then the electromagnetic coil 21 generates heat by electromagnetic induction and welds the plug-in point between the capillary 102 and the liquid separation hole 101.

[0047] While the electromagnetic coil 21 is welding the distributor 100 and the capillary 102 , nitrogen is introduced into the base 1 through the gas pipe 4 , and the nitrogen continuously flushes the liquid separation hole 101 .

[0048] Step 4, after welding is completed, low-temperature air is flushed to the welding point between the distributor 100 and the capillary tube 102 through the two cooling pipes 7. After the distributor 100 is cooled, the distributor 100 is removed from the base 1.

[0049] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A welding device for an air conditioner distributor and a capillary tube, wherein the distributor (100) is hollow and has a plurality of liquid separation holes (101) for correspondingly plugging capillary tubes (102), characterized in that: The welding device comprises a base (1) for carrying the distributor (100), a welding assembly (2) for welding the plurality of capillaries (102) relative to the distributor (100), and a positioning assembly (3) for positioning the plurality of capillaries (102), wherein the positioning assembly (3) comprises a positioning plate (31), the positioning plate (31) having a positioning position, and when the positioning plate (31) is in the positioning position, the plurality of capillaries (102) are respectively inserted into the positioning plate (31); The positioning plate (31) is movably arranged along the length direction of the capillary (102), and the positioning assembly (3) further comprises a first driving member (32) for driving the positioning plate (31) to move, and a plurality of positioning holes (33) arranged at intervals on the positioning plate (31), wherein the plurality of positioning holes (33) correspond to the plurality of liquid separation holes (101) one by one, and the center line of each positioning hole (33) coincides with the axis center line of the corresponding capillary (102); Each of the positioning holes (33) is internally connected with a guide ring (34), and the guide ring (34) comprises a plurality of guide portions (341) arranged circumferentially around the positioning hole (33), and each of the guide portions (341) is provided with an arc-shaped guide surface, and a clearance groove (342) is provided between two adjacent guide portions (341).

2. The welding device for an air conditioner distributor and a capillary tube according to claim 1, characterized in that: The base (1) is hollow and connected to the distributor (100); the base (1) is connected to a gas supply pipe (4) for inputting inert gas.

3. The welding device for an air conditioner distributor and a capillary tube according to claim 2, characterized in that: The base (1) is cylindrical and comprises a hollow outer base body (11) and an inner base body (12) coaxially arranged in the outer base body (11); an annular air passage (13) is formed between the outer base body (11) and the inner base body (12); the distributor (100) and the air delivery pipe (4) are both connected to the air passage (13).

4. The welding device for an air conditioner distributor and a capillary tube according to claim 3, characterized in that: The diameter of the inner seat body (12) gradually decreases in a direction approaching the distributor (100); one end of the inner seat body (12) away from the distributor (100) is connected to the outer seat body (11), and the end close to the distributor (100) is a free end; an air outlet cavity (14) is formed between the free end and the outer seat body (11); and the air outlet cavity (14) is respectively connected to the air passage (13) and the distributor (100).

5. The welding device for an air conditioner distributor and a capillary tube according to claim 1, characterized in that: The base (1) is provided with a rotatable turntable (5) and a second driving member (6) for driving the turntable (5) to rotate. The dispenser (100) is supported on the turntable (5), and the rotation axis of the turntable (5) extends along the axial direction of the dispenser (100).

6. The welding device for an air conditioner distributor and a capillary tube according to claim 1, characterized in that: The welding assembly (2) comprises an electromagnetic coil (21) movably arranged along the length direction of the capillary (102) and a third driving member (22) for driving the electromagnetic coil (21) to move, and the electromagnetic coil (21) can surround the circumference of the dispenser (100) during its moving stroke.

7. The welding device for an air conditioner distributor and a capillary tube according to claim 1, characterized in that: The welding device further comprises a cooling pipe (7) for outputting cooling gas, the end of the cooling pipe (7) having a gas outlet (71), and the gas outlet (71) is suspended on the side of the distributor (100).

8. A welding process for an air conditioner distributor and a capillary tube, characterized in that: The welding process is based on the welding device according to any one of claims 1 to 7, and comprises the following steps: Step 1, placing the distributor (100) on the base (1), putting a solder ring on one end of a plurality of capillaries (102), and inserting the plurality of ends into the plurality of liquid separation holes (101) respectively; Step 2, moving the positioning plate (31) to a positioning position and sleeved onto the other ends of the plurality of capillaries (102); Step 3, welding the connection between the capillary tube (102) and the liquid separation hole (101) by using the welding assembly (2); Step 4: After welding is completed, the distributor (100) is removed from the base (1).

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