Welding tool, heater module and integrated module electric compressor

Abstract

The invention discloses a welding tool, a heater module and an integrated module electric compressor, and belongs to the technical field of heater welding machines.The welding tool comprises a tool body, a containing cavity is formed in the tool body, a heater is placed in the containing cavity, and the heater comprises a base plate and a heating plate; the heating plate is connected with a plurality of heat conducting fins; the tool body comprises an upper positioning assembly and a lower positioning assembly, the upper positioning assembly and the lower positioning assembly are mutually fixed through bolts, the lower surface of the upper positioning assembly, the upper surface of the lower positioning assembly and cavities in the opposite surfaces of the upper positioning assembly and the lower positioning assembly are combined to form a containing cavity, and a plurality of welding exhaust holes are formed in the containing cavity. A stress release groove is connected into the containing cavity. The substrate surface temperature can be reasonably and effectively utilized, waste of waste heat in the substrate welding process is reduced, the heat efficiency in the substrate welding process is improved, and the welding quality of the substrate and a heating plate is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of heater welding processing, and more specifically to a welding tool, a heater module and an integrated module electric compressor. Background Art

[0002] In a low-temperature environment, the heating rate of the car and the operating temperature of the battery are crucial to the driving experience. In a low-temperature environment, the heating module in the heater assembly can quickly increase the temperature of the fluid medium, and then increase the temperature of the battery and the interior of the vehicle through the liquid medium. In order to achieve the above purpose, a heating module can be set at the bottom of the control unit near the compressor air intake position, which can heat the fluid medium faster and also heat the refrigerant entering the compressor, thereby increasing the heating speed of the compressor.

[0003] Thick film heating technology is a heating device that uses thick film screen printing technology on a substrate, such as stainless steel plate, ceramic, glass or aluminum alloy plate, to print insulating medium, heating resistor, conductor and insulating protective layer on the substrate in sequence, and then sinter at high temperature. At present, thick film thermal printing technology has gradually matured, with the characteristics of good thermal conductivity, large heat dissipation area and high safety performance, and can be applied to the above-mentioned usage scenarios.

[0004] Existing stainless steel thick film heaters are limited by screen printing technology, and there is no other heat dissipation structure on the surface of the substrate. Therefore, the surface temperature of the substrate is relatively high, and its heat cannot be fully and effectively utilized, resulting in a waste of some excess heat and low thermal efficiency. In order to attach a heat dissipation structure to the substrate, it is necessary to weld dissimilar metals. The commonly used welding tools can generally only position the welded components, and cannot control or have poor control effect on the gradient distribution of heat, resulting in poor thermal conductivity of the welded heater and low heating efficiency.

[0005] Therefore, in view of this, the existing structure is studied and improved, and a welding tool, a heater module and an integrated module electric compressor are provided, in order to achieve a more practical purpose. Summary of the invention

[0006] 1. Technical issues to be solved

[0007] In view of the problems existing in the prior art, the purpose of the present invention is to provide a welding tool, a heater module and an integrated module electric compressor, which can realize the rational and effective utilization of the surface temperature of the substrate, reduce the waste of waste heat in the substrate welding process, improve the thermal efficiency in the substrate welding process, effectively improve the welding quality between the substrate and the heating plate, and improve the reliability of the tooling.

[0008] 2. Technical solution

[0009] To solve the above problems, the present invention adopts the following technical solutions.

[0010] A welding tool, a heater module and an integrated module electric compressor, comprising a tool body, a receiving cavity is provided inside the tool body, a heater is placed inside the receiving cavity, the heater comprises a substrate and a heating plate, and a plurality of heat-conducting fins are connected to the heating plate;

[0011] The tool body comprises an upper positioning assembly and a lower positioning assembly, the upper positioning assembly and the lower positioning assembly are fixed to each other by bolts, and the lower surface of the upper positioning assembly, the upper surface of the lower positioning assembly and the cavity of the opposite surfaces of the two are combined to form an accommodating cavity, the accommodating cavity is provided with a plurality of welding exhaust holes, and the interior of the accommodating cavity is connected with a stress release groove;

[0012] The lower surface of the upper positioning assembly is provided with upper heat-averaging holes corresponding to the heat-conducting fins one by one, a gap is formed between the inner wall of the upper heat-averaging hole and the heat-conducting fin, and the gap is connected to the accommodating cavity;

[0013] The upper surface of the lower positioning component is provided with lower heat-averaging holes corresponding to the heat-conducting fins one by one, and the lower heat-averaging holes penetrate the lower positioning component.

[0014] Furthermore, the tooling is a rectangular parallelepiped structure formed of graphite material;

[0015] The substrate is a ferrite stainless steel structure, and the heating plate is an aluminum alloy structure.

[0016] Furthermore, a plurality of the welding exhaust holes are distributed along the length direction of the accommodating cavity, and the extension distance covers all the heat-conducting fins;

[0017] The welding exhaust hole is opened on the lower surface of the upper positioning component or the upper surface of the lower positioning component.

[0018] Furthermore, the number of the stress release grooves is not less than two groups, and the two groups of stress release grooves are centrally symmetrical.

[0019] Furthermore, one end of the stress release groove is communicated with the accommodating cavity, and the other end of the stress release groove is communicated with the welding exhaust hole.

[0020] Furthermore, the upper positioning assembly is a rectangular parallelepiped structure with an opening on the upper side, and the lower positioning assembly is a rectangular parallelepiped structure with an opening on the lower side.

[0021] Furthermore, a group of first heat-absorbing holes are provided on the front side and the rear side of the upper positioning component;

[0022] A group of second heat-absorbing holes are respectively provided on the left and right sides of the upper positioning component.

[0023] Furthermore, a group of third heat-absorbing holes are provided on the front side and the rear side of the lower positioning assembly;

[0024] A set of fourth heat-absorbing holes is provided on the left and right sides of the lower positioning component.

[0025] A heater module includes the following processing steps:

[0026] First, place the substrate in the accommodating cavity of the lower positioning component, then place aluminum foil on the upper surface of the substrate, with solder distributed on the surface of the aluminum foil, then place the heating plate on the aluminum foil, and then place the welding tool in the brazing furnace for brazing. After the brazing is completed, a heater module is obtained.

[0027] An integrated modular electric compressor includes a heater module.

[0028] 3. Beneficial effects

[0029] Compared with the prior art, the advantages of the present invention are:

[0030] ① This scheme, by setting a number of structures such as heat equalizing holes, guides the high-temperature gas in the brazing furnace during the welding process, so that the temperature distribution in the tooling is more uniform. At the same time, the welding exhaust holes are used to discharge the gas between the substrate and the heating plate during the extrusion and welding process, thereby reducing the probability of welding pores on the welding surface between the substrate and the heating plate, improving the welding quality of the substrate and the heating plate, realizing the reasonable and effective use of the surface temperature of the substrate, reducing the waste of residual heat during the welding process of the substrate, improving the thermal efficiency during the welding process of the substrate, and effectively improving the welding quality of the substrate and the heating plate;

[0031] ② In this solution, the accommodating cavity is connected with a stress release groove for relieving stress, which can disperse the stress of the tooling, alleviate the stress concentration phenomenon, reduce the probability of deformation or even cracking of the tooling due to stress concentration and thermal expansion of the bolts, and improve the reliability of the tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the three-dimensional structure of the tooling body in the present invention;

[0033] Figure 2 It is a schematic diagram of the structure of the tooling body of the present invention after being disassembled;

[0034] Figure 3 For the present invention Figure 2 The structural diagram of the enlarged part A in the middle;

[0035] Figure 4 It is a structural schematic diagram of the lower positioning assembly of the present invention;

[0036] Figure 5 is a simulated temperature diagram of the lower surface of the heater in the present invention;

[0037] Figure 6 This is a simulated temperature diagram of the upper surface of the heater in the present invention.

[0038] Description of the numbers in the figure:

[0039] 1. Tooling body;

[0040] 101, accommodating cavity; 102, welding exhaust hole; 103, stress relief groove;

[0041] 2. Heater;

[0042] 201, substrate; 202, heating plate; 203, heat conducting fins;

[0043] 3. Upper positioning assembly; 301. Upper heat-saturating hole; 302. First heat-saturating hole; 303. Second heat-saturating hole;

[0044] 4. Lower positioning assembly; 401. Lower heat-saturating hole; 402. Third heat-saturating hole; 403. Fourth heat-saturating hole. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0046] Embodiment 1:

[0047] See also Figure 1 - Figure 4 , a welding tool, a heater module and an integrated module electric compressor, comprising a tool body 1, a receiving cavity 101 is provided inside the tool body 1, a heater 2 is placed inside the receiving cavity 101, the heater 2 comprises a substrate 201 and a heating plate 202, and a plurality of heat conducting fins 203 are connected to the heating plate 202;

[0048] The tool body 1 includes an upper positioning assembly 3 and a lower positioning assembly 4, which are fixed to each other by bolts, and the lower surface of the upper positioning assembly 3, the upper surface of the lower positioning assembly 4 and the cavity of the opposite surfaces of the two are combined to form an accommodating cavity 101, and a plurality of welding exhaust holes 102 are arranged on the accommodating cavity 101, and a stress release groove 103 is connected inside the accommodating cavity 101;

[0049] The welding exhaust hole 102 can exhaust the gas between the substrate 201 and the heating plate 202 during the extrusion and welding process, reduce the probability of welding pores on the welding surface between the substrate 201 and the heating plate 202, and improve the welding quality between the substrate 201 and the heating plate 202.

[0050] The lower surface of the upper positioning assembly 3 is provided with upper heat-averaging holes 301 corresponding to the heat-conducting fins 203 one by one, and a gap is formed between the inner wall of the upper heat-averaging holes 301 and the heat-conducting fins 203, and the gap is connected to the accommodating cavity 101;

[0051] The accommodating cavity 101 is connected with a stress release groove 103 for relieving stress, which can disperse the stress of the tooling, alleviate the stress concentration phenomenon, reduce the probability of deformation or even cracking of the tooling due to stress concentration and thermal expansion of the bolts, and improve the reliability of the tooling.

[0052] It can guide the high temperature gas in the brazing furnace during the welding process, making the temperature distribution in the tooling more uniform.

[0053] The upper surface of the lower positioning component 4 is provided with lower heat-averaging holes 401 corresponding to the heat-conducting fins 203 one by one, and the lower heat-averaging holes 401 penetrate the lower positioning component 4 .

[0054] See also Figure 1 and Figure 2 Specifically, the tooling is a rectangular structure formed of graphite material; graphite is resistant to high temperatures and has a small deformation at high temperatures, which can effectively inhibit the deterioration of welding quality caused by deformation of the tooling.

[0055] The base plate 201 is made of ferrite stainless steel, and the heating plate 202 is made of aluminum alloy.

[0056] See also Figure 1 , Figure 2 and Figure 4 Specifically, a plurality of welding exhaust holes 102 are distributed along the length direction of the accommodating cavity 101, and the extension distance covers all the heat conducting fins 203;

[0057] The welding exhaust hole 102 is opened on the lower surface of the upper positioning component 3 or the upper surface of the lower positioning component 4 .

[0058] During welding, the gas between the substrate 201 and the heating plate 202 during the extrusion and welding process can be exhausted through the welding exhaust hole 102.

[0059] See also Figure 4 Specifically, the number of the stress release grooves 103 is not less than two groups, and the two groups of stress release grooves 103 are centrally symmetrical.

[0060] During the welding process, the bolts expand due to heat, causing internal stress in the upper positioning assembly 3 and the lower positioning assembly 4 , which damages the upper positioning assembly 3 and the lower positioning assembly 4 . At this time, the stress can be released through the stress release groove 103 .

[0061] See also Figure 2 and Figure 4 Specifically, one end of the stress release groove 103 is connected to the accommodating cavity 101 , and the other end of the stress release groove 103 is connected to the welding exhaust hole 102 .

[0062] In this way, stress release can be ensured while smooth exhaust of hot air can be ensured.

[0063] See also Figure 1 , Figure 2 and Figure 4 Specifically, the upper positioning component 3 is a rectangular parallelepiped structure with an upper opening, and the lower positioning component 4 is a rectangular parallelepiped structure with a lower opening.

[0064] The upper positioning assembly 3 and the lower positioning assembly 4 have similar structures and are nearly symmetrically distributed, which improves the convenience of aligning and assembling the two when in use.

[0065] Specifically, a group of first heat-absorbing holes 302 are provided on the front and rear sides of the upper positioning assembly 3;

[0066] A group of second heat-absorbing holes 303 are respectively formed on the left and right sides of the upper positioning component 3 .

[0067] Specifically, a group of third heat-absorbing holes 402 are opened on the front side and the rear side of the lower positioning assembly 4;

[0068] A set of fourth heat-absorbing holes 403 is provided on the left and right sides of the lower positioning component 4 .

[0069] Ensures even distribution of heat.

[0070] A heater module includes the following processing steps:

[0071] First, place the substrate 201 in the accommodating cavity 101 of the lower positioning component 4, then place aluminum foil on the upper surface of the substrate 201, with solder distributed on the surface of the aluminum foil, then place the heating plate 202 on the aluminum foil, and then place the welding tool in a brazing furnace for brazing. After brazing is completed, a heater module is obtained.

[0072] An integrated modular electric compressor includes a heater module.

[0073] Working principle:

[0074] This kind of tooling guides the high-temperature gas in the brazing furnace during the welding process through the upper heat-averaging hole 301, the first heat-averaging hole 302, the second heat-averaging hole 303 on the upper positioning component 3, and the lower heat-averaging hole 401, the third heat-averaging hole 402, and the fourth heat-averaging hole 403 on the lower positioning component 4, so as to make the temperature distribution in the tooling body 1 more uniform.

[0075] The welding exhaust hole 102 is used to exhaust the gas between the substrate 201 and the heating plate 202 during the extrusion and welding process, thereby reducing the probability of welding pores on the welding surface between the substrate 201 and the heating plate 202, improving the welding quality between the substrate 201 and the heating plate 202, and realizing the reasonable and effective use of the surface temperature of the substrate 201, reducing the waste of residual heat during the welding process of the substrate 201, improving the thermal efficiency during the welding process of the substrate 201, and effectively improving the welding quality between the substrate 201 and the heating plate 202.

[0076] Embodiment 2:

[0077] Based on the above embodiment 1, further description is given.

[0078] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 The thickness s, length a and width b of the upper positioning component 3 and the lower positioning component 4 are all the same.

[0079] The number of first heat-averaging holes 302 in each group of first heat-averaging holes 302 is 3, wherein the inner wall of the first first heat-averaging hole 302 is flush with the inner wall of the accommodating cavity 101, and the remaining two first heat-averaging holes 302 are both located on the left side of the first first heat-averaging hole 302, and the height of the first heat-averaging hole 302 is 0.5~0.6S, and the width is 0.1~0.2a.

[0080] The distance between adjacent first heat-absorbing holes 302 is 0.05-0.1a.

[0081] The number of third heat-averaging holes 402 in each group of third heat-averaging holes 402 is 4, wherein the inner wall of the first third heat-averaging hole 402 is flush with the inner wall of the accommodating cavity 101, and the remaining three third heat-averaging holes 402 are all located on the left side of the first first heat-averaging hole 302, and the height of the first, second and third third heat-averaging holes 402 is 0.5-0.6s, and the width is 0.1-0.2a. The distance between the first third heat-averaging hole 402 and the second third heat-averaging hole 402 is 0.05-0.1a, the distance between the second third heat-averaging hole 402 and the third third heat-averaging hole 402 is 0.05-0.1a, and the distance between the third third heat-averaging hole 402 and the fourth third heat-averaging hole 402 is 0.05-0.1a.

[0082] The fourth third heat-absorbing hole 402 has a width of 0.05-0.1a and a height of 0.5-0.6s.

[0083] The number of each group of second heat-averaging holes 303 and fourth heat-averaging holes 403 is 2, and the two second heat-averaging holes 303 and the two fourth heat-averaging holes 403 are axially symmetrically arranged along the transverse center axis of the heater. The height of the second heat-averaging holes 303 is 0.1~0.2a, and the width is 0.3~0.4b. The spacing between adjacent second heat-averaging holes 303 is 0.1~0.2b. The height of the fourth heat-averaging holes 403 is 0.1~0.2a, and the width is 0.3~0.4b. The spacing between adjacent fourth heat-averaging holes 403 is 0.1~0.2b.

[0084] Embodiment 3:

[0085] Based on the above-mentioned Embodiment 1 and Embodiment 2, further description is given.

[0086] See also Figure 5 and Figure 6 Through simulation experiments, the temperature distribution diagram is obtained. It can be clearly seen that by opening a number of heat equalizing holes of different specifications, the heat distribution on the upper and lower surfaces of the heater 2 during the welding process is more uniform, which can significantly reduce the temperature difference during the welding process of the heater 2, so that the heater 2 is heated evenly, thereby effectively reducing the deterioration of the welding quality caused by uneven temperature, thereby improving the welding quality and ensuring the heat conduction efficiency of the heating plate in the heater.

[0087] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A welding tool, comprising a tool body (1), wherein a receiving cavity (101) is provided inside the tool body (1), and a heater (2) is placed inside the receiving cavity (101), characterized in that: The heater (2) comprises a substrate (201) and a heating plate (202), and a plurality of heat-conducting fins (203) are connected to the heating plate (202); The tool body (1) comprises an upper positioning assembly (3) and a lower positioning assembly (4), wherein the upper positioning assembly (3) and the lower positioning assembly (4) are fixed to each other by bolts, and the lower surface of the upper positioning assembly (3), the upper surface of the lower positioning assembly (4) and the cavity of the surfaces opposite to each other are combined to form a receiving cavity (101), wherein a plurality of welding exhaust holes (102) are arranged on the receiving cavity (101), and a stress release groove (103) is connected inside the receiving cavity (101); The lower surface of the upper positioning assembly (3) is provided with upper heat-averaging holes (301) corresponding one-to-one to the heat-conducting fins (203), a gap is formed between the inner wall of the upper heat-averaging holes (301) and the heat-conducting fins (203), and the gap is connected to the accommodating cavity (101); The upper surface of the lower positioning component (4) is provided with lower heat-averaging holes (401) corresponding one-to-one to the heat-conducting fins (203), and the lower heat-averaging holes (401) penetrate the lower positioning component (4).

2. The welding tool according to claim 1, characterized in that: The tooling is a rectangular parallelepiped structure formed of graphite material; The substrate (201) is a ferrite stainless steel structure, and the heating plate (202) is an aluminum alloy structure.

3. The welding tool according to claim 1, characterized in that: A plurality of the welding exhaust holes (102) are distributed along the length direction of the accommodating cavity (101), and extend to cover all the heat-conducting fins (203); The welding exhaust hole (102) is opened on the lower surface of the upper positioning component (3) or the upper surface of the lower positioning component (4).

4. The welding tool according to claim 1, characterized in that: The number of the stress release grooves (103) is not less than two groups, and the two groups of stress release grooves (103) are centrally symmetrical.

5. The welding tool according to claim 1, characterized in that: One end of the stress release groove (103) is in communication with the accommodating cavity (101), and the other end of the stress release groove (103) is in communication with the welding exhaust hole (102).

6. The welding tool according to claim 1, characterized in that: The upper positioning component (3) is a rectangular parallelepiped structure with an opening on the upper side, and the lower positioning component (4) is a rectangular parallelepiped structure with an opening on the lower side.

7. The welding tool according to claim 1, characterized in that: A group of first heat-absorbing holes (302) are provided on the front and rear sides of the upper positioning component (3); A group of second heat-averaging holes (303) are provided on the left and right sides of the upper positioning component (3).

8. The welding tool according to claim 1, characterized in that: A group of third heat-absorbing holes (402) are provided on the front side and the rear side of the lower positioning component (4); A group of fourth heat-absorbing holes (403) are provided on the left and right sides of the lower positioning component (4).

9. A heater module, characterized in that: The welding tool according to any one of claims 1 to 8 is processed, comprising the following processing steps: First, the substrate (201) is placed in the accommodating cavity (101) of the lower positioning component (4), and then aluminum foil is placed on the upper surface of the substrate (201), with solder distributed on the surface of the aluminum foil. Then, the heating plate (202) is placed on the aluminum foil, and then the welding tool is placed in a brazing furnace for brazing. After the brazing is completed, a heater module is obtained.

10. An integrated module electric compressor, characterized in that: Comprising the heater module of claim 9.

Images