Signal transmission device and electrical equipment

Abstract

The utility model discloses a signal transmission device and electrical equipment, and relates to the technical field of electromagnetic compatibility, the signal transmission device comprises a first outgoing line and a second outgoing line, the input end of the first outgoing line is connected with a first device, and the output end of the first outgoing line is connected with a second device; the second outgoing line has a first reference point, and the input end of the second outgoing line is connected with the first device; at least part of the first outgoing line is arranged close to the first reference point of the second outgoing line, and after the first outgoing line is arranged close to the first reference point of the second outgoing line, electromagnetic waves in the first outgoing line and electromagnetic waves in the second outgoing line are mutually coupled. According to the technical scheme provided by the invention, the distance between the first lead-out wire and the second lead-out wire is shortened, so that the electromagnetic waves of the first lead-out wire and the second lead-out wire are coupled, and the miniaturization design of the electronic equipment is ensured while the electromagnetic interference is reduced.

Description

Technical Field

[0001] The present application relates to the field of electromagnetic compatibility technology, and in particular to a signal transmission device and electrical equipment. Background Art

[0002] In modern electronic devices, electromagnetic compatibility (EMC) refers to the ability of a device or system to operate normally within its electromagnetic environment without causing electromagnetic interference to any other devices in that environment. With the increasing popularity and sophistication of electronic products, EMI issues are becoming increasingly common. This interference can not only affect the performance of the device itself but can also cause instability or even failure of the entire system. Consequently, the demand for EMC in existing electronic products is increasing.

[0003] Currently, the industry's common approach to addressing electromagnetic compatibility (EMC) issues is to reduce or eliminate electromagnetic interference by adding EMI filtering circuits and devices. While this approach can improve EMC performance to a certain extent, it requires the addition of additional filtering circuits to existing electronic devices, hindering the miniaturization of electronic device designs. Utility Model Content

[0004] The main purpose of this application is to propose a signal transmission device and an electrical device, aiming to reduce electromagnetic interference while ensuring the miniaturization design of electronic equipment.

[0005] To achieve the above objectives, the signal transmission device proposed in this application includes:

[0006] a first lead wire, wherein an input end of the first lead wire is connected to a first device, and an output end of the first lead wire is connected to a second device;

[0007] a second lead having a first reference point, wherein an input end of the second lead is connected to the first device;

[0008] At least a portion of the first lead-out line is arranged close to a first reference point of the second lead-out line, so that the electromagnetic waves in the first lead-out line and the electromagnetic waves in the second lead-out line are coupled to each other.

[0009] Optionally, an output end of the second lead is grounded.

[0010] Optionally, the second lead-out line has a first branch, a second branch and a return point, the return point connects the output end of the first branch and the input end of the second branch, the input end of the first branch is connected to the first device, and the output end of the second branch is connected to the first device.

[0011] Optionally, the length of the reflow branch is less than ten centimeters.

[0012] Optionally, the first reference point is set at the first branch, or the first reference point is set at an end of the reflux branch close to the first branch.

[0013] Optionally, a portion of the first lead-out line that is less than a first preset distance from the first reference point is arranged close to the first reference point.

[0014] Optionally, there are multiple first lead lines, and a portion of each first lead line that is less than a first preset distance from the first reference point is arranged close to the first reference point.

[0015] Optionally, the number of the first lead wire is at least one, and the number of the second lead wire is at least one.

[0016] Optionally, there are multiple second lead-out lines, and the first lead-out line is arranged close to the second lead-out line with the smallest straight-line distance therefrom.

[0017] Optionally, the signal transmission device further comprises a third lead wire, wherein an output end of the third lead wire is connected to the first device, and an input end of the third lead wire is connected to the second device;

[0018] The minimum straight-line distance between any point in the third lead-out line and the first reference point is greater than a second preset distance.

[0019] Optionally, the signal transmission device further includes a fourth lead line, the fourth lead line has a second reference point, and an input end of the fourth lead line is connected to the second device;

[0020] The minimum straight-line distance between any point of the fourth lead-out line and the first reference point is greater than a second preset distance; and

[0021] At least a portion of the third lead-out line is disposed close to the second reference point of the fourth lead-out line, so that the electromagnetic wave in the third lead-out line and the electromagnetic wave in the fourth lead-out line are coupled to each other.

[0022] Optionally, the second preset distance is greater than five centimeters.

[0023] The present application also provides an electrical device, comprising a first device, a second device, and the signal transmission device as described in any one of the above items;

[0024] The input end of the first lead wire of the signal transmission device is connected to the first device, and the output end of the first lead wire of the signal transmission device is connected to the second device;

[0025] The input end of the second lead wire of the signal transmission device is connected to the first device, and the output end of the second lead wire of the signal transmission device is grounded or connected to the first device.

[0026] Optionally, the electrical equipment includes refrigeration equipment.

[0027] Optionally, the refrigeration equipment is specifically an air conditioner.

[0028] In summary, the present application proposes a signal transmission device that aims to reduce electromagnetic interference while ensuring the miniaturization of the electronic device to which the signal transmission device is applied. Specifically, the first lead is used to transmit the output signal or power supply of the first device to the second device, and the input end of the second lead is also connected to the first device so that the signal is output from the first device; then, by placing the first lead close to the first reference point of the second lead, the common-mode suppression principle can be utilized to reduce common-mode interference within a specific frequency range and improve the electromagnetic compatibility of the system. Therefore, the present signal transmission device can effectively reduce electromagnetic interference, simplify circuit design, support the miniaturization of the first device, and reduce costs without adding additional filters or other complex components. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0030] Figure 1 A schematic structural diagram of the first embodiment of the signal transmission device provided by this application;

[0031] Figure 2 A schematic structural diagram of a second embodiment of a signal transmission device provided by this application;

[0032] Figure 3 This is a schematic structural diagram of the third embodiment of the signal transmission device provided by this application;

[0033] Figure 4 This is a structural diagram of the fourth embodiment of the signal transmission device provided in this application.

[0034] Description of Figure Numbers:

[0035] 10. First lead wire; 20. Second lead wire; 21. First reference point; 22. First branch; 23. Second branch; 24. Return branch; 30. Third lead wire; 40. Fourth lead wire; 41. Second reference point; 42. Third branch; 43. Fourth branch; 44. Second return branch; 50. First device; 60. Second device.

[0036] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0037] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0038] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), such directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0040] In modern electronic devices, electromagnetic compatibility (EMC) refers to the ability of a device or system to operate normally within its electromagnetic environment without causing electromagnetic interference to any other devices in that environment. With the increasing popularity and sophistication of electronic products, EMI issues are becoming increasingly common. This interference can not only affect the performance of the device itself but can also cause instability or even failure of the entire system. Consequently, the demand for EMC in existing electronic products is increasing.

[0041] Currently, the industry's common approach to addressing electromagnetic compatibility (EMC) issues is to reduce or eliminate electromagnetic interference by adding EMI filtering circuits and devices. While this approach can improve EMC performance to a certain extent, it requires the addition of additional filtering circuits to existing electronic devices, hindering the miniaturization of electronic device designs.

[0042] like Figure 1 As shown, the present application proposes a signal transmission device designed to reduce electromagnetic interference while ensuring the miniaturization of electronic devices. In one embodiment, the signal transmission device may include a first lead 10 and a second lead 20. It will be understood that the first lead 10 is used for power or signal transmission between the first device 50 and the second device 60, while the second lead 20 is a circuit specifically used for common-mode suppression.

[0043] In this embodiment, the input end of the first lead wire 10 is connected to the output end of the first device 50, and the output end of the first lead wire 10 is connected to the input end of the second device 60. It will be understood that the first device 50 outputs a signal or power to the second device 60 via the first lead wire 10. In some examples, the first device 50 and the second device 60 may be different components within a household appliance, such as a controller, microprocessor, or other control module within the household appliance. In other examples, the first device 50 and the second device 60 may also be two different household appliances. In this manner, the first device 50 can provide a signal or power to the second device 60 via the first lead wire 10.

[0044] It should be noted that the signal transmission device can be used in any electronic device, not just household appliances.

[0045] In this embodiment, the second lead wire 20 has a first reference point 21, and the input end of the second lead wire 20 is connected to the first device 50. It is understandable that the input end of the second lead wire 20 is also connected to the first device 50, so that the electromagnetic waves in the second lead wire 20 and the first lead wire 10 propagate along the same path, and there is a common-mode interference signal between the two. In addition, the specific position of the first reference point 21 is not limited here. The first reference point 21 can be set at any position in the second lead wire 20, which can be determined according to the actual application scenario. In this way, the role of the second lead wire 20 is to eliminate the above-mentioned common-mode interference signal to improve electromagnetic compatibility. The specific explanation and operation are as follows.

[0046] In this embodiment, the first lead 10 and the second lead 20 exhibit a common-mode relationship for signals of a specific frequency. Specifically, when a signal or current flows through the first lead 10 and the second lead 20, if an interference signal of a certain frequency is present, this interference signal will appear between the first lead 10 and the second lead 20 with the same amplitude and phase, thus forming common-mode noise. This common-mode noise is caused by external electromagnetic fields coupling into the signal path and return path, and can adversely affect the electromagnetic compatibility of the system.

[0047] It should be noted that the common-mode suppression principle is a technology that effectively reduces common-mode noise, which is to reduce the impact of common-mode noise by utilizing the characteristics of symmetrical layout and mutual cancellation of electromagnetic fields. Furthermore, in this embodiment, after the first lead 10 is connected to the first device 50, at least part of the first lead 10 is set close to the first reference point 21. When common-mode noise appears between the first lead 10 and the second lead 20, the electromagnetic fields therebetween will partially cancel each other out after passing through the first reference point 21, thereby significantly reducing common-mode interference. Optionally, the distance between the first lead 10 and the first reference point 21 is maintained within a few centimeters, and this section of the first lead 10 close to the first reference point 21 should be away from other paths or interference sources to avoid additional noise coupling.

[0048] In this embodiment, the first reference point 21 can be a point or a line segment. The length of the line segment is not limited. The first lead wire 10 approaches the line segment. When the first reference point 21 is a line segment, the portion of the first lead wire 10 corresponding to the first reference point 21 should be as parallel as possible to the first reference point 21, and the distance between the first lead wire 10 and the first reference point 21 should be sufficiently close to enhance the electromagnetic field coupling between them. Generally, the smaller the distance between the wires, the better the magnetic field coupling effect.

[0049] Thus, the signal transmission device reduces the need for interference filters, facilitates the miniaturization of the first device 50, and reduces overall costs. In short, this layout design improves electromagnetic compatibility while ensuring the overall miniaturization of the system.

[0050] In summary, the present application proposes a signal transmission device that aims to reduce electromagnetic interference while ensuring the miniaturization of the electronic device to which the signal transmission device is applied. Specifically, the first lead 10 is used to transmit the output signal or power supply of the first device 50 to the second device 60, and the input end of the second lead 20 is also connected to the first device 50 so that the signal is output from the first device 50; then, by placing the first lead 10 close to the first reference point 21 of the second lead 20, the common-mode suppression principle can be utilized to reduce common-mode interference within a specific frequency range and improve the electromagnetic compatibility of the system. Therefore, the present signal transmission device can effectively reduce electromagnetic interference, simplify circuit design, support the miniaturization of the first device 50, and reduce costs without adding additional filters or other complex components.

[0051] It should be noted that the output end of the second lead wire 20 is not limited to which device it is connected to. The output end of the second lead wire 20 can be grounded or connected to a certain position of the first device 50 or a certain position of the second device 60, acting as a grounding wire to discharge the interference signal in the second lead wire 20, thereby reducing the interference signal flowing into the second device 60 through other paths, thereby suppressing electromagnetic interference.

[0052] In one embodiment, the output end of the second lead 20 is grounded. It will be appreciated that by grounding the output end of the second lead 20, a low-impedance return path can be provided for the common-mode interference signal. Thus, the common-mode interference signal can be effectively guided to ground via this path, thereby preventing the interference signal from flowing into the second device 60 via other paths, thereby suppressing electromagnetic interference. Furthermore, this design helps stabilize the system's reference potential, further improving the electromagnetic compatibility performance of the entire system.

[0053] In this embodiment, if Figure 2 As shown, the second lead-out line 20 has a first branch 22, a second branch 23, and a return branch 24 connecting the first branch 22 and the second branch 23. The return branch 24 connects the output end of the first branch 22 and the input end of the second branch 23. The input end of the first branch 22 is connected to the output end of the first device 50, and the output end of the second branch 23 is connected to a certain location inside the first device 50 for grounding. It can be understood that one end of the first branch 22 is connected to the output end of the first device 50, serving as a path for signals or power to flow from the first device 50 to the return branch 24; one end of the second branch 23 is connected to a certain location inside the first device 50, serving as a path for signals or power to return from the return branch 24 to the first device 50. The "certain location inside" mentioned here is actually a location used for grounding, that is, the output end of the second branch 23 is ultimately connected to the ground. In this way, the signal or power starts from the output of the first device 50, passes through the first branch 22, reaches the return branch 24, and then returns to the first device 50 through the second branch 23 and is ultimately grounded. This loop design allows common-mode interference signals to be guided to ground through the return branch 24, thereby preventing these interference signals from flowing into sensitive parts of the system through other paths, thereby suppressing electromagnetic interference.

[0054] The lengths of the first branch 22 and the second branch 23 can be adjusted according to actual needs, but it should be noted that different lengths may affect electromagnetic compatibility. It is generally recommended to keep the lengths of the two branches similar to reduce unnecessary electromagnetic interference.

[0055] It should be noted that the length of the return branch 24 should be as short as possible. In this embodiment, the return branch 24 is less than ten centimeters in length. In this way, electromagnetic interference can be reduced and the electromagnetic compatibility of the system can be improved. It should be explained that a longer return path will increase the radiation area of ​​the electromagnetic field, thereby increasing unnecessary electromagnetic interference; while a shorter return branch 24 can limit such radiation and reduce interference with the external environment and other circuits. In addition, a shorter return path means lower impedance, which helps to reduce losses in signal transmission and can more effectively guide common-mode interference signals to the ground, thereby improving the stability of the system.

[0056] In some applications, the return branch 24 can be a point, namely a return point. When the return branch 24 is simplified to a point, the return path of the signal or power is greatly shortened, which reduces the radiation area of ​​the electromagnetic field and significantly reduces the interference to the external environment and other circuits.

[0057] In one embodiment, the first reference point 21 is located at the first branch 22. It is understood that setting the first reference point 21 at the first branch 22 means that common mode interference can be detected and suppressed at this location during the process of signal or power flowing from the first device 50 to the return branch 24.

[0058] In one embodiment, the first reference point 21 is set at one end of the return branch 24 close to the first branch 22. It can be understood that setting the first reference point 21 as the return point means that in the process of the signal or power returning from the first branch 22 to the second branch 23 through the return branch 24, common-mode interference can be detected and suppressed at the return point.

[0059] In one embodiment, the portion of the first lead 10 that is less than the first preset distance from the first reference point 21 is positioned proximate to the first reference point 21. It will be appreciated that this ensures that the signal path and the return path are effectively coupled within the specific region between the first lead 10 and the first reference point 21, thereby suppressing common-mode interference. In other words, with the first reference point 21 as the center and the first preset distance as the radius, all portions of the first lead 10 within this circle will be proximate to the first reference point 21.

[0060] In this embodiment, the first preset distance can be set according to specific requirements of actual applications and can be within a few centimeters (for example, less than five centimeters or shorter).

[0061] Furthermore, after the portion corresponding to the first lead 10 approaches the first reference point 21, the distance from the first reference point 21 should be as small as possible. This ensures close coupling of the electromagnetic fields between the signal path and the return path, effectively suppressing common-mode interference. Furthermore, a shorter distance helps reduce interference from external electromagnetic fields on the circuit and helps maintain good impedance matching, further improving the system's electromagnetic compatibility.

[0062] In one embodiment, there are multiple first lead wires 10, and the portion of each first lead wire 10 that is less than a first predetermined distance from the first reference point 21 is positioned near the first reference point 21. It will be appreciated that in actual applications, there may not be just one first lead wire 10, but rather multiple signal or power paths may need to be transmitted. Therefore, positioning each first lead wire 10 near the first reference point 21 can meet the requirements of more complex electronic systems while maintaining good electromagnetic compatibility.

[0063] In one embodiment, the number of the first lead wires 10 is at least one, and the number of the second lead wires 20 is at least one. Specifically, the number of the second lead wires 20 is multiple, and the first lead wire 10 is arranged close to the second lead wire 20 with the smallest straight-line distance therefrom. It is understandable that when the number of the first lead wires 10 is multiple, the second lead wires 20 are also arranged in multiples, which can solve the problem of the second lead wires 20 being in short supply, and also avoid the line being too crowded and affecting the final electromagnetic compatibility. In this embodiment, each first lead wire 10 is close to the second lead wire 20 with the smallest straight-line distance therefrom, which can ensure that each first lead wire 10 can effectively couple electromagnetic waves with the nearest second lead wire 20, thereby achieving the best common-mode interference suppression effect.

[0064] It can be understood that after the corresponding part of each first lead line 10 approaches the first reference point 21, the distance from the first reference point 21 should be as small as possible. In this way, the electromagnetic field between the signal path and the return path can be tightly coupled, thereby effectively suppressing common-mode interference.

[0065] In one embodiment, if Figure 3 As shown, the signal transmission device further includes a third lead line 30 , the output end of the third lead line 30 is connected to the first device 50 , and the input end of the third lead line 30 is connected to the second device 60 .

[0066] It is understood that in actual application scenarios, there will not only be a first lead 10 for transmitting signals or power from the first device 50 to the second device 60, but also a third lead 30 for transmitting signals or power from the second device 60 to the first device 50. The need for bidirectional signal transmission is common in many electronic devices. For example, in a control system, a controller needs to send control signals to an actuator, and the actuator also needs to feedback status information to the controller.

[0067] In this embodiment, the minimum straight-line distance between any point on the third lead-out line 30 and the first reference point 21 is greater than the second preset distance. It should be noted that setting the minimum straight-line distance between any point on the third lead-out line 30 and the first reference point 21 to be greater than the second preset distance effectively reduces the impact of the third lead-out line 30 on the first reference point 21. This prevents unnecessary coupling and interference between the signal or power supply in the third lead-out line 30 and the first reference point 21, thereby maintaining the stability of the first reference point 21. Furthermore, by maintaining a certain distance, effective isolation between different signal paths is achieved, helping to prevent signal crosstalk between different paths.

[0068] It is understandable that, in addition to the third lead 30, the first reference point 21 also needs to be away from other possible interference sources, such as high-power devices, switching power supplies, etc. This can further reduce the impact of external interference on the system and improve the stability and anti-interference ability of the system.

[0069] In one embodiment, if Figure 4 As shown, the signal transmission device further includes a fourth lead 40 having a second reference point 41. The input end of the fourth lead 40 is connected to the second device 60. It will be appreciated that the fourth lead 40 can be used to achieve common-mode rejection with the third lead 30, using the same principle as the common-mode rejection achieved between the first lead 10 and the second lead 20. This maximizes the electromagnetic compatibility of devices employing the signal transmission device.

[0070] In this embodiment, the minimum straight-line distance between any point in the fourth lead line 40 and the first reference point 21 is greater than the second preset distance. It is understandable that the minimum straight-line distance between any point in the fourth lead line 40 and the first reference point 21 is greater than the second preset distance. This ensures that the first reference point 21 is away from the fourth lead line 40, thereby reducing the impact of the fourth lead line 40 on the first reference point 21. At the same time, it also prevents the first reference point 21 or the second lead line 20 from affecting the fourth lead line 40. Specifically, maintaining a certain distance can prevent the signal or power in the fourth lead line 40 from generating unnecessary coupling and interference with the first reference point 21, thereby maintaining the stability of the first reference point 21. Vice versa, the stability of the second reference point 41 can be ensured. This helps reduce common-mode noise, improves the common-mode suppression effect, and can isolate different signal paths to prevent signal crosstalk between different paths.

[0071] At least part of the third lead line 30 is arranged near the second reference point 41 of the fourth lead line 40 so that the electromagnetic waves in the third lead line 30 and the electromagnetic waves in the fourth lead line 40 are coupled with each other. Specifically, at least part of the third lead line 30 is arranged near the second reference point 41 of the fourth lead line 40 so that the electromagnetic waves in the third lead line 30 and the electromagnetic waves in the fourth lead line 40 are coupled with each other. By arranging a part of the third lead line 30 near the second reference point 41 of the fourth lead line 40, the electromagnetic coupling between the two can be increased. This coupling helps the common-mode interference signals in this area to cancel each other out, thereby significantly reducing the impact of common-mode noise. At the same time, the part of the third lead line 30 near the second reference point 41 should be away from other paths or interference sources to avoid introducing additional noise and ensure that the effect of common-mode suppression is not weakened by other interference.

[0072] In this embodiment, the second preset distance is five centimeters. In actual applications, the electromagnetic interference transmission distances of signals in different frequency bands are different, so the second preset distance can be determined according to actual conditions, and the specific value is not limited here.

[0073] In this embodiment, if Figure 4As shown, the fourth lead-out line 40 has a third branch 42, a fourth branch 43, and a second return branch 44 connecting the third branch 42 and the fourth branch 43. The second return branch 44 connects the output end of the third branch 42 and the input end of the fourth branch 43. The input end of the third branch 42 is connected to the output end of the second device 60, and the output end of the fourth branch 43 is connected to a certain location inside the second device 60 for grounding. It can be understood that one end of the third branch 42 is connected to the output end of the second device 60, serving as a path for signals or power to flow from the second device 60 to the second return branch 44; one end of the fourth branch 43 is connected to a certain location inside the second device 60, serving as a path for signals or power to return from the second return branch 44 to the second device 60. The "certain location inside" mentioned here is actually a location used for grounding, that is, the output end of the fourth branch 43 is ultimately connected to the ground. In this way, the signal or power starts from the output terminal of the second device 60, passes through the third branch 42, reaches the second return branch 44, and then returns to the second device 60 through the fourth branch 43 and is ultimately grounded. This loop design allows common-mode interference signals to be guided to ground through the second return branch 44, thereby preventing these interference signals from flowing into sensitive parts of the system through other paths, thereby suppressing electromagnetic interference.

[0074] The present application also provides an electrical device, comprising a first device 50, a second device 60, and a signal transmission device as described in any of the above items. It should be noted that the electrical device includes the signal transmission device, and the specific structure of the signal transmission device is similar to that of the above embodiments. Since the electrical device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be detailed here.

[0075] The input end of the first lead wire 10 of the signal transmission device is connected to the first device 50, and the output end of the first lead wire 10 of the signal transmission device is connected to the second device 60. The input end of the second lead wire 20 of the signal transmission device is connected to the first device 50, and the output end of the second lead wire 20 of the signal transmission device is grounded or connected to the first device 50. In this way, electromagnetic interference between the first device 50 and the second device 60 can be reduced without increasing the number of components in the electrical device, thereby lowering the cost.

[0076] Optionally, the electrical equipment includes refrigeration equipment, and the electrical equipment may further include air conditioning.

[0077] In other application scenarios, the signal transmission device is also suitable for various electronic devices that require high electromagnetic compatibility, such as industrial automation equipment, automotive electronic systems, household appliances, medical equipment, and consumer electronic products.

[0078] The above description is merely an exemplary embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structural transformation made using the contents of the present application specification and drawings under the technical concept of the present application, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present application.

Claims

1. A signal transmission device, characterized in that: The signal transmission device includes: a first lead wire, wherein an input end of the first lead wire is connected to a first device, and an output end of the first lead wire is connected to a second device; a second lead having a first reference point, wherein an input end of the second lead is connected to the first device; At least part of the first lead wire is arranged close to the first reference point of the second lead wire, and after the first lead wire is arranged close to the first reference point of the second lead wire, the electromagnetic waves in the first lead wire and the electromagnetic waves in the second lead wire are coupled with each other.

2. The signal transmission device according to claim 1, wherein: An output end of the second lead is grounded.

3. The signal transmission device according to claim 1, wherein: The second lead-out line has a first branch, a second branch and a return branch, the return branch is connected to the output end of the first branch and the input end of the second branch, the input end of the first branch is connected to the first device, and the output end of the second branch is connected to the first device.

4. The signal transmission device according to claim 3, wherein: The length of the return branch is less than ten centimeters.

5. The signal transmission device according to claim 3, wherein: The first reference point is set at the first branch, or the first reference point is set at an end of the return branch close to the first branch.

6. The signal transmission device according to any one of claims 1 to 5, characterized in that: A portion of the first lead-out line that is less than a first preset distance from the first reference point is disposed close to the first reference point.

7. The signal transmission device according to any one of claims 1 to 5, characterized in that: There are multiple first lead lines, and a portion of each first lead line that is less than a first preset distance from the first reference point is arranged close to the first reference point.

8. The signal transmission device according to any one of claims 1 to 5, characterized in that: The number of the first lead wire is at least one, and the number of the second lead wire is at least one.

9. The signal transmission device according to claim 8, wherein: There are multiple second lead-out lines, and the first lead-out line is arranged close to the second lead-out line with the smallest straight-line distance therefrom.

10. The signal transmission device according to claim 1, wherein: The signal transmission device further includes a third lead wire, wherein the output end of the third lead wire is connected to the first device, and the input end of the third lead wire is connected to the second device; The minimum straight-line distance between any point in the third lead-out line and the first reference point is greater than a second preset distance.

11. The signal transmission device according to claim 10, wherein: The signal transmission device further includes a fourth lead line, the fourth lead line has a second reference point, and an input end of the fourth lead line is connected to the second device; The minimum straight-line distance between any point of the fourth lead-out line and the first reference point is greater than a second preset distance; and At least part of the third lead line is arranged close to the second reference point of the fourth lead line, and after the third lead line is arranged close to the second reference point of the fourth lead line, the electromagnetic waves in the third lead line and the electromagnetic waves in the fourth lead line are coupled with each other.

12. The signal transmission device according to claim 10 or 11, characterized in that: The second preset distance is greater than five centimeters.

13. An electrical device, characterized in that: The electrical device comprises a first device, a second device, and a signal transmission device according to any one of claims 1 to 12; The input end of the first lead wire of the signal transmission device is connected to the first device, and the output end of the first lead wire of the signal transmission device is connected to the second device; The input end of the second lead wire of the signal transmission device is connected to the first device, and the output end of the second lead wire of the signal transmission device is grounded or connected to the first device.

14. The electrical device according to claim 13, wherein: The electrical equipment includes refrigeration equipment.

15. The electrical device according to claim 14, characterized in that: The refrigeration equipment is specifically an air conditioner.

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