Induction coil for air conditioner four-way valve pipeline brazing

Abstract

The utility model discloses an induction coil for air conditioner four-way valve pipeline brazing, which comprises a left coil and a right coil which are independent, the two coils are respectively provided with an induction part, and the induction parts of the two coils are of a mirror symmetry structure; the induction part comprises a refrigeration pipe induction area, a heating pipe induction area and an air return pipe induction area, and the three induction areas are located in the same loop. Seen from the side face, the distribution sequence of the induction areas of the refrigeration pipe, the heating pipe and the air return pipe is consistent with the distribution sequence of the refrigeration pipe, the heating pipe and the air return pipe on the air conditioner four-way valve; seen from the top, the refrigeration pipe induction area and the heating pipe induction area are distributed on the same side, and the air return pipe induction area is distributed on the other side. Seen from the front side, the refrigeration pipe induction area and the heating pipe induction area have the same height, and the air return pipe induction area is higher than the refrigeration pipe induction area and the heating pipe induction area; according to the induction coil, the influence of the associated heating effect on the brazing process can be reduced, and the heating condition can be flexibly adjusted, so that the consistency and the stability of the brazing quality of the CES pipe are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to welding technical field, concretely relates to a kind of induction coil for air conditioning four-way valve pipeline brazing. BACKGROUND

[0002] Four-way reversing valve, four-way valve for short, is the core component of air conditioning system, and has a large number of applications in air conditioning industry, and the pipeline brazing matched therewith is one of the key processes in manufacturing process. Figure 1 As shown is a typical four-way valve structure, mainly including main valve body 1, pilot valve 2, refrigeration pipe (C) 3, heating pipe (E) 4, return air pipe (S) 5 and exhaust pipe (D) 6 and other components, wherein the four pipes of refrigeration pipe (C) 3, heating pipe (E) 4, return air pipe (S) 5 and exhaust pipe (D) 6 all need to be brazed with other pipe fittings.

[0003] Traditionally, the pipeline brazing of four-way valve largely adopts manual flame brazing method, which has the advantages of high flexibility and strong working condition adaptability, but also has some disadvantages, such as high labor intensity, poor working conditions, low production efficiency, material waste, unstable welding quality and other problems; the process of copper pipe brazing has the characteristics of fast heating speed, small heating area and uneven heating, and the quality of brazed joint is sensitive to heating position, filler position and filler timing, which often needs to be adjusted in real time, which leads to that the brazing quality depends on the experience of operators to a great extent.

[0004] However, with the increasing demand for production capacity or automation level, various attempts have been made in the industry on brazing methods and process automation; currently, the two common schemes are as follows: 1. retaining flame brazing and improving scheme with automatic filler; 2. using induction coil heating and scheme with pre-installed welding ring. In the process of specific implementation, the equipment cannot be flexibly adjusted according to the real-time state of the pipe fittings to be welded, so various problems occur; especially the three pipes (hereinafter referred to as CES pipe) of refrigeration pipe (C) 3, heating pipe (E) 4 and return air pipe (S) 5 on four-way valve, because they are very close in space and have inconsistent heights, such as Figure 2As shown, no matter flame heating or induction heating, the pipe beside the pipe to be welded will be heated together during the heating process, so that the heating conditions of the three pipes are difficult to control consistently, and how to ensure the brazing conditions and quality of the three pipes are the same has been a difficult problem in the industry. In the specific implementation process of induction heating, there are two forms of coils: one is a coil that heats each pipe separately, which is simple in structure, but because it is heated separately, the effect of associated heating is large, and the brazing process parameters of the three pipes are different; one is a coil that heats the three pipes at the same time, the coil structure is complex, and the associated heating effect can be used to realize synchronous heating, but because the heat dissipation conditions of the three pipes are different, the heating effect is also different, and once the coil is completed, the heating effect of each pipe cannot be adjusted flexibly. Therefore, neither of the coils can ensure the consistency and stability of the brazing quality of the CES pipe.

[0005] In order to reduce the influence of the associated heating effect, it is necessary to develop a special induction coil for the CES pipe of the air conditioner four-way valve. The utility model discloses a kind of induction coils for air conditioner four-way valve pipe brazing, which can reduce the influence of associated heating effect on brazing process, and heating condition can be flexibly adjusted, so as to improve the brazing quality consistency and stability of CES pipe.

[0006] The utility model discloses a kind of induction coils for air conditioner four-way valve pipe brazing, which can reduce the influence of associated heating effect on brazing process, and heating condition can be flexibly adjusted, so as to improve the brazing quality consistency and stability of CES pipe.

[0007] To achieve the above object, the utility model adopts the following technical scheme:

[0008] The first aspect of the utility model provides a kind of induction coils for air conditioner four-way valve pipe brazing, including left, right two independent coils, two coils have induction part and the induction part of two is mirror image symmetry structure;

[0009] Taking the left coil as an example, the induction part includes first induction zone and second induction zone, and the first induction zone and the second induction zone form an avoidance zone;The first induction zone is divided into refrigeration pipe induction zone and heating pipe induction zone, and the second induction zone is return air pipe induction zone;The refrigeration pipe induction zone, heating pipe induction zone and return air pipe induction zone are located in the same loop;

[0010] From side, the distribution order of the refrigeration pipe induction zone, heating pipe induction zone and return air pipe induction zone is consistent with the distribution order of refrigeration pipe, heating pipe and return air pipe on the air conditioner four-way valve;

[0011] From above, the refrigeration pipe induction zone and heating pipe induction zone are distributed on the same side, and the return air pipe induction zone is distributed on the other side;

[0012] From the front, the height of the refrigeration pipe induction area and the heating pipe induction area is same, and the height of the return pipe induction area is higher than the height of the refrigeration pipe induction area and the heating pipe induction area.

[0013] Further, from the front, the height difference of the refrigeration pipe induction area, the heating pipe induction area and the return pipe induction area is greater than the height difference of the refrigeration pipe, the heating pipe and the return pipe on the air conditioner four-way valve.

[0014] Further, the left and right coils further comprise coil bases.

[0015] Further, the left and right coils are cooperatively installed on a positive and negative screw rod in use, the left and right coils are cross arranged and avoid each other in the cross area through the avoiding area, the distance between the left and right coils is adjusted based on the mirror image symmetry plane, so that the left and right coils are in different cooperative states.

[0016] Further, the positive and negative screw rod is driven by a servo motor.

[0017] Further, the cooperative state of the left and right coils is the open state, the distance between the first induction area of the left coil and the first induction area of the right coil is equal to the distance between the second induction area of the left coil and the second induction area of the right coil.

[0018] Further, the cooperative state of the left and right coils is the CE clamping state, the distance between the first induction area of the left coil and the first induction area of the right coil is less than the distance between the second induction area of the left coil and the second induction area of the right coil, at this time, the refrigeration pipe induction area of the left and right coils can surround the outer periphery of the refrigeration pipe welding part on the air conditioner four-way valve to solder the refrigeration pipe welding part, and the heating pipe induction area of the left and right coils can surround the outer periphery of the heating pipe welding part on the air conditioner four-way valve to solder the heating pipe welding part.

[0019] Further, the cooperative state of the left and right coils is the S clamping state, the distance between the second induction area of the left coil and the second induction area of the right coil is less than the distance between the first induction area of the left coil and the first induction area of the right coil, at this time, the return pipe induction area of the left and right coils can surround the outer periphery of the return pipe welding part on the air conditioner four-way valve to solder the return pipe welding part.

[0020] Compared with the prior art, the utility model has at least the following beneficial effects:

[0021] The induction coil for brazing of the air conditioner four-way valve pipeline provided by the utility model can realize induction brazing of the refrigeration pipe, the heating pipe (two side pipe fittings) and the return air pipe (middle pipe fitting) of the air conditioner four-way valve pipeline by adjusting the interval and position of the induction part of the left and right coils, can flexibly adjust the heating state under different brazing conditions, can reduce the influence of the associated heating effect, can improve the consistency of the brazing process parameters and the consistency and stability of the brazing quality, can simultaneously weld the heating pipe and the refrigeration pipe, can save the welding time and can improve the brazing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structure schematic view of the air conditioner four-way valve in the prior art.

[0023] Figure 2 It is a side view of the air conditioner four-way valve. Figure 1

[0024] Figure 3 It is a structure schematic view of the induction coil for brazing of the air conditioner four-way valve pipeline of the utility model.

[0025] Figure 4 It is a top view of the left coil in the utility model. Figure 3

[0026] It is a side view of the left coil in the utility model. Figure 5 Figure 3 It is a front view of the left coil in the utility model.

[0027] Figure 6 Figure 3 It is a schematic view of the induction coil for brazing of the air conditioner four-way valve pipeline of the utility model in the open state.

[0028] Figure 7 It is a schematic view of the induction coil for brazing of the air conditioner four-way valve pipeline of the utility model in the CE clamping state.

[0029] Figure 8 It is a schematic view of the induction coil for brazing of the air conditioner four-way valve pipeline of the utility model in the S clamping state.

[0030] Figure 9 It is a working schematic view of the utility model for brazing of the refrigeration pipe and the heating pipe of the air conditioner four-way valve.

[0031] Figure 10 It is a working schematic view of the utility model for brazing of the return air pipe of the air conditioner four-way valve.

[0032] Figure 11 It is a working schematic view of the utility model for brazing of the return air pipe of the air conditioner four-way valve. ​​​

[0033] Figure: 1 - main valve body;

[0034] 2 - pilot valve;

[0035] 3 - refrigeration pipe;

[0036] 4 - heating pipe;

[0037] 5 - return pipe;

[0038] 6 - exhaust pipe;

[0039] 7 - left coil; 71 - induction part; 711 - refrigeration pipe induction area; 712 - heating pipe induction area; 713 - return pipe induction area; 714 - avoidance area; 72 - coil base;

[0040] 8 - right coil. DETAILED DESCRIPTION

[0041] The utility model will be described in further detail below in combination with specific implementation and examples. It should be understood that the following examples are only used to further illustrate the utility model and should not be understood as limiting the protection scope of the utility model. Some non-essential improvements and adjustments made by the professional technicians in the field according to the content of the utility model still belong to the protection scope of the utility model.

[0042] To make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model and not all the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0043] Therefore, the detailed description of the embodiments of the utility model provided in the drawings below is not intended to limit the scope of the claimed utility model but only represents selected embodiments of the utility model. All other embodiments obtained by the ordinary skilled person in the art based on the embodiments in the utility model without making creative efforts all belong to the protection scope of the utility model.

[0044] It should be noted that similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0045] In the description of the utility model, it is necessary to explain that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the utility model product is used, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0046] In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0047] In the description of the utility model, it is also necessary to explain that, unless otherwise explicitly specified and limited, the terms "set", "mount", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0048] Referring to Figures 1-2 , Figure 1 It is a typical air conditioner four-way valve structure, Figure 2 It is Figure 1 the side view, from Figure 1 and Figure 2It can be known that the air conditioner four-way valve mainly comprises a main valve body 1, a pilot valve 2, a refrigeration pipe 3, a heating pipe 4, a return air pipe 5 and an exhaust pipe 6 and the like, wherein the refrigeration pipe 3, the heating pipe 4, the return air pipe 5 and the exhaust pipe 6 all need to be connected with other pipe fittings by brazing; the induction coil for brazing the pipeline of the air conditioner four-way valve is used for welding the refrigeration pipe 3, the heating pipe 4 and the return air pipe 5 in the air conditioner four-way valve, the three pipes of the refrigeration pipe 3, the heating pipe 4 and the return air pipe 5 on the air conditioner four-way valve are very close in space and the height of the return air pipe 5 is inconsistent with that of the refrigeration pipe 3 and the heating pipe 4, the cross structure induction coil capable of simultaneously satisfying two brazing conditions (the heat dissipation conditions of the refrigeration pipe 3, the heating pipe 4 (two side pipe fittings) and the return air pipe 5 (middle pipe fitting) are inconsistent during the welding process and the pipe fittings beside the to-be-welded pipe fittings will be heated by association during the heating process, and the brazing conditions are divided into two side pipe fittings and middle pipe fitting) is designed, the advantage of the induction coil lies in that, for the two brazing conditions, the position of the coil can be adjusted according to the actual heating state, the adjustment can also reduce the influence of the associated heating effect in a comprehensive manner, so that the consistency of the brazing process parameters of each pipeline and the consistency and stability of the brazing quality are ensured as much as possible. Meanwhile, since the refrigeration pipe 3 and the heating pipe 4 are welded at the same time, the welding time of one pipe is saved, the purpose of improving the production rhythm is also achieved, and the welding production efficiency of the air conditioner four-way valve is improved, and the application advantage is great under the condition of large capacity.

[0049] Referring to Figure 3 The induction coil for brazing the pipeline of the air conditioner four-way valve comprises two independent coils, namely a left coil 7 and a right coil 8, and both of the two coils have an induction part 71, and the induction parts 71 of the two coils are mirror-symmetrical structures.

[0050] Referring to Figures 4-6 Taking the left coil 7 as an example, the induction part 71 comprises a first induction area and a second induction area, and an avoiding area 714 is formed between the first induction area and the second induction area; the first induction area is divided into a refrigeration pipe induction area 711 and a heating pipe induction area 712, and the second induction area is a return air pipe induction area 713; the refrigeration pipe induction area 711, the heating pipe induction area 712 and the return air pipe induction area 713 are located in the same loop.

[0051] Referring to Figure 4 From the side, the distribution order of the refrigeration pipe induction area 711, the heating pipe induction area 712 and the return air pipe induction area 713 is consistent with the distribution order of the refrigeration pipe 3, the heating pipe 4 and the return air pipe 5 on the air conditioner four-way valve.

[0052] Referring to Figure 5 From above, the refrigeration pipe induction area 711 and the heating pipe induction area 712 are distributed on the same side, and the return air pipe induction area 713 is distributed on the other side.

[0053] Referring to Figure 6 From the front, the heights of the refrigerant pipe sensing area 711 and the heating pipe sensing area 712 are the same, and the height of the return pipe sensing area 713 is higher than the heights of the refrigerant pipe sensing area 711 and the heating pipe sensing area 712.

[0054] Further, from the front, the height difference between the refrigerant pipe sensing area 711, the heating pipe sensing area 712 and the return pipe sensing area 713 is greater than the height difference between the refrigerant pipe 3, the heating pipe 4 and the return pipe 5 on the air conditioner four-way valve.

[0055] Further, the left and right coils further include a coil base 72.

[0056] Hereinafter, the refrigerant pipe 3 is referred to as a C pipe, the heating pipe 4 is referred to as an E pipe, and the refrigerant pipe 3 and the heating pipe 4 are referred to as CE pipes; and the return pipe 5 is referred to as an S pipe.

[0057] In actual use, the left and right coils are installed on a lead screw driven by a servo motor, and the left and right coils are arranged in a cross manner and avoid each other in the cross area through the avoidance area 714 to realize the adjustment of the distance between the left and right coils based on the mirror-symmetrical plane, so that the left and right coils are in different matching states; the matching of the left and right coils has three typical states, as shown in Figures 7-9 The first state is an open state (see Figure 7 ), the distance between the first sensing area of the left coil 7 and the first sensing area of the right coil 8 is less than the distance between the second sensing area of the left coil 7 and the second sensing area of the right coil 8, and this state is the general state in standby condition. Figure 8 The second state is a CE clamping state (see Figure 10 ), the left and right coils in the open state are moved close to each other, the distance between the second sensing area of the left coil 7 and the second sensing area of the right coil 8 is increased, and the distance between the first sensing area of the left coil 7 and the first sensing area of the right coil 8 is reduced, finally the refrigerant pipe sensing area 711 of the left and right coils surrounds the outer periphery of the C pipe welding part on the air conditioner four-way valve to solder the C pipe welding part, and the heating pipe sensing area 712 of the left and right coils surrounds the outer periphery of the E pipe welding part on the air conditioner four-way valve to solder the E pipe welding part, and this state is referred to as a CE pipe soldering state (see Figure 9 The third state is an S clamping state (see Figure 11 ), the left and right coils in the open state are moved away from each other, the distance between the first sensing area of the left coil 7 and the first sensing area of the right coil 8 is increased, and the distance between the second sensing area of the left coil 7 and the second sensing area of the right coil 8 is reduced, finally the return pipe sensing area 713 of the left and right coils surrounds the outer periphery of the return pipe 5 welding part on the air conditioner four-way valve to solder the return pipe 5 welding part, and this state is referred to as an S pipe soldering state (see); from the matching situation of the left and right coils, the CE pipe is simultaneously brazed, and the S pipe is separately brazed; the brazing process is adopted to braze the CE pipe, and the heating and heat dissipation conditions of the CE pipe are completely consistent, the heating and heat dissipation conditions of the S pipe are different from those of the CE pipe; the brazing sequence of the CE pipe and the S pipe can be adjusted according to actual conditions.

[0058] Taking the sequence of first welding the CE pipe and then welding the S pipe as an example, the complete welding process is as follows: first, the left and right coils are moved to the two sides of the CES pipe in the open state by the mechanical arm and the center height of the first induction zone is ensured to be consistent with the center height of the to-be-heated area of the CE pipe; second, the left and right coils are close to each other to reach the CE clamping state, the left and right coils are simultaneously powered to heat the CE pipe until the brazing process is completed, as shown in Figure 10 At this time, since the second induction zone is far away from the S pipe, the second induction zone has very weak induction effect on the S pipe, the first induction zone has a certain induction effect on the S pipe, and the CE pipe also has a certain heat radiation on the S pipe, which causes the S pipe to have a certain temperature rise; third, the left and right coils are vertically moved downward to make the center height of the second induction zone consistent with the center height of the to-be-heated area of the S pipe, the left and right coils are far away from each other to reach the S clamping state, the left and right coils are simultaneously powered to heat the S pipe until the brazing process is completed, as shown in Figure 11 At this time, since the CE pipe has completed the brazing process, the induction of the second induction zone on the CE pipe and the heat radiation of the S pipe on the CE pipe are not enough to cause the CE pipe to re-melt, so it will not affect the brazing quality of the CE pipe; finally, the left and right coils are close to each other to the open state, and the mechanical arm moves the left and right coils away from the two sides of the CES pipe, so that the entire brazing process of the CES pipe of the four-way valve is completed.

[0059] In addition, it should be understood that, after reading the above teaching content of the utility model, those skilled in the art can make various improvements or modifications to the utility model, and these equivalent forms also fall within the scope defined by the claims of the present application.

Claims

1. An induction coil for brazing the piping of an air conditioning four-way valve, characterized in that, It includes two independent coils, one on the left and one on the right. Both coils have induction parts and the induction parts of the two coils are mirror symmetrical. Taking the left coil as an example, the sensing part includes a first sensing area and a second sensing area, and a clearance area is formed between the first sensing area and the second sensing area; the first sensing area is divided into a cooling pipe sensing area and a heating pipe sensing area, and the second sensing area is a return pipe sensing area; the cooling pipe sensing area, the heating pipe sensing area and the return pipe sensing area are located in the same circuit. Viewed from the side, the distribution order of the refrigeration pipe sensing area, the heating pipe sensing area, and the return pipe sensing area is consistent with the distribution order of the refrigeration pipe, the heating pipe, and the return pipe on the air conditioner four-way valve. From the top view, the refrigeration pipe sensing area and the heating pipe sensing area are located on the same side, while the return gas pipe sensing area is located on the other side. Viewed from the front, the sensing areas of the cooling pipe and the heating pipe are at the same height, while the sensing area of ​​the return pipe is higher than the sensing areas of the cooling pipe and the heating pipe.

2. The induction coil according to claim 1, characterized in that, Viewed from the front, the height difference between the refrigeration pipe sensing area, the heating pipe sensing area, and the return pipe sensing area is greater than the height difference between the refrigeration pipe, the heating pipe, and the return pipe on the air conditioning four-way valve.

3. The induction coil according to claim 1, characterized in that, The left and right coils also include coil bases.

4. The induction coil according to claim 1, characterized in that, When in use, the left and right coils are installed together on a positive and negative lead screw. The left and right coils are arranged in a cross manner and they avoid each other in the cross area through a avoidance zone. This allows the spacing of the left and right coils to be adjusted based on a mirror symmetry plane, so that the left and right coils are in different engagement states.

5. The induction coil according to claim 4, characterized in that, The forward and reverse lead screws are driven by a servo motor.

6. The induction coil according to claim 1, characterized in that, The left and right coils are in an open state, and the distance between the first sensing area of ​​the left coil and the first sensing area of ​​the right coil is equal to the distance between the second sensing areas of the left coil and the second sensing areas of the right coil.

7. The induction coil according to claim 1, characterized in that, The left and right coils are in a CE clamped state. The distance between the first sensing area of ​​the left coil and the first sensing area of ​​the right coil is less than the distance between the second sensing area of ​​the left coil and the second sensing area of ​​the right coil. At this time, the refrigeration pipe sensing areas of the left and right coils can surround the outer periphery of the refrigeration pipe welding part on the air conditioner four-way valve and braze the refrigeration pipe welding part. At the same time, the heating pipe sensing areas of the left and right coils can surround the outer periphery of the heating pipe welding part on the air conditioner four-way valve and braze the heating pipe welding part.

8. The induction coil according to claim 1, characterized in that, The left and right coils are in a clamped state (S). The distance between the second sensing area of ​​the left coil and the second sensing area of ​​the right coil is less than the distance between the first sensing area of ​​the left coil and the first sensing area of ​​the right coil. At this time, the return pipe sensing areas of the left and right coils can surround the outer periphery of the return pipe welding part on the air conditioner four-way valve and braze the return pipe welding part.

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