High-performance protective device for improving electrical safety and electromagnetic compatibility and air conditioner

Abstract

The utility model discloses a protective device for improving electrical safety and electromagnetic compatibility performance and an air conditioner, the protective device for improving electrical safety and electromagnetic compatibility performance comprises a protective body, at least one fixing device installed on the protective body, and wire passing holes matched with the fixing devices in a one-to-one manner; a magnetic ring is clamped on the fixing device, and each power line penetrating through the line passing hole passes through the magnetic ring on the fixing device matched with the power line. Compared with the prior art, the magnetic ring is arranged at the power supply end, and the power line is wound around the magnetic ring, so that the electromagnetic compatibility can be improved, and the electromagnetic interference of electronic equipment can be reduced.

Description

A protective device that enhances electrical safety and electromagnetic compatibility performance; air conditioner Technical Field

[0001] This utility model relates to the field of air conditioning, and in particular to a protective device and air conditioner that improves electrical safety and electromagnetic compatibility performance. Background Technology

[0002] The mainboard of the controller of a variable frequency air conditioner is quite complex, using a variety of electronic components. The electromagnetic waves radiated and leaked by these components not only seriously interfere with the normal operation of other electronic devices, causing equipment malfunctions and transmission errors, but also threaten human health and safety. Adding a magnetic ring to the electromagnetic interference circuit is a common method to weaken or suppress electromagnetic interference and is an important means of electromagnetic compatibility rectification.

[0003] Due to the limitations of the fixed assembly of the magnetic ring, the installation position of the magnetic ring is generally as close as possible to the interference source or sensitive source. Adding a magnetic ring at the power supply end is a less common method at present. However, adding a magnetic ring at the power supply end and passing the power line around the magnetic ring can improve electromagnetic compatibility performance and reduce electromagnetic interference of electronic equipment.

[0004] Therefore, how to design a protective device and air conditioner that can improve electrical safety and electromagnetic compatibility performance, and solve the problem of winding a magnetic ring through the power cord and fixing the magnetic ring, is a technical problem that the industry urgently needs to solve. Summary of the Invention

[0005] In view of the problem in the prior art that the magnetic ring cannot be placed at the power supply end due to the fixed assembly of the magnetic ring, thus preventing the power line from passing through the magnetic ring, this utility model proposes a protective device and air conditioner that improves electrical safety and electromagnetic compatibility performance.

[0006] The technical solution of this utility model is to propose a protective device that improves electrical safety and electromagnetic compatibility performance, including: a protective body 1, and at least one fixing device 2 installed on the protective body 1, and wire through holes 3 that are matched one-to-one with the fixing device 2.

[0007] The fixing device 2 holds a magnetic ring 4, and each power line passing through the wire hole 3 passes through the magnetic ring 4 on the fixing device 2 that matches it.

[0008] Furthermore, the fixing device 2 includes two clamping members 21 arranged opposite to each other, each clamping member 21 is mounted on the protective body 1, and the side facing the other clamping member 21 is an arc surface;

[0009] The space between the arc surfaces of the two clamping members 21 matches the outer contour of the magnetic ring 4.

[0010] Furthermore, the fixing device 2 also includes a plurality of supporting ribs 22 installed on the protective body 1;

[0011] The supporting ribs 22 are distributed on the upper or lower part of the clamping member 21, and a gap is provided between two adjacent supporting ribs 22 to accommodate the power line passing through.

[0012] Furthermore, the protective body 1 has a groove-shaped structure;

[0013] The protective device also includes a protective outer cover 5 that is assembled with the protective body 1 to form a receiving cavity for the groove-shaped structure.

[0014] Furthermore, the wire hole 3 is disposed on one side wall of the protective body 1, and multiple hollow ribs are also disposed on the side wall where the wire hole 3 is installed, and the gap between two adjacent hollow ribs forms a ventilation and heat dissipation hole 6.

[0015] Furthermore, it also includes at least one screw hole 7 provided on the protective body 1, through which the protective outer cover 5 is assembled with the protective body 1.

[0016] Furthermore, it also includes a handle 8 provided on the protective outer cover 5.

[0017] Furthermore, the diameter of the wire hole 3 is smaller than the diameter of the magnetic ring 4.

[0018] This utility model also proposes an air conditioner that has the above-mentioned protective device for improving electrical safety and electromagnetic compatibility performance.

[0019] Furthermore, the protective device is installed on the outdoor unit of the air conditioner, and a waterproof baffle 9 is also provided at the installation location of the protective device and the outdoor unit casing of the air conditioner.

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

[0021] 1. This utility model has a fixing device on the protective body. The fixing device can fix the magnetic ring, so that the power line can pass through the magnetic ring, thereby improving electromagnetic compatibility performance and reducing electromagnetic interference of electronic equipment.

[0022] 2. This utility model has waterproof baffles on both sides of the fixing device, and the ventilation and heat dissipation holes are set in the middle of the corresponding wire passage holes of the two fixing devices, which can prevent rainwater from splashing onto the live parts in the wiring area through the ventilation and heat dissipation holes. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 is a schematic diagram of the protective device of this utility model that improves electrical safety and electromagnetic compatibility performance from a first-view perspective.

[0025] Figure 2 is a schematic diagram of the protective device of this utility model that improves electrical safety and electromagnetic compatibility performance from a second perspective.

[0026] Figure 3 is a structural schematic diagram of the protective device of this utility model that improves electrical safety and electromagnetic compatibility performance from a third-person perspective.

[0027] Figure 4 is a schematic diagram of the protective device of this utility model that improves electrical safety and electromagnetic compatibility performance from a fourth perspective.

[0028] Figure 5 shows the current spectrum of the air conditioner under the traditional scheme;

[0029] Figure 6 shows the current spectrum in the air conditioner after adopting the protective device of this utility model that improves electrical safety and electromagnetic compatibility performance.

[0030] Among them, 1 is the protective body, 2 is the fixing device, 21 is the clamping part, 22 is the supporting rib, 3 is the wire hole, 4 is the magnetic ring, 5 is the protective outer cover, 6 is the ventilation and heat dissipation hole, 7 is the hole screw, 8 is the handle, and 9 is the waterproof baffle. Detailed Implementation

[0031] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0032] Therefore, a feature pointed out in this specification is used to describe one feature of one embodiment of the present invention, and does not imply that every embodiment of the present invention must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0033] The principle and structure of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0034] Adding ferrite rings to electromagnetic interference circuits is a common method to weaken or suppress electromagnetic interference. However, due to the limitation of fixing the ferrite rings, very few ferrite rings are added to the power lines, resulting in device radiation and leakage, which can lead to equipment malfunction and transmission errors.

[0035] To address the aforementioned issues, this utility model proposes a protective device that enhances electrical safety and electromagnetic compatibility performance. Please refer to Figure 2, which includes a protective body 1, at least one fixing device 2 installed on the protective body 1, and wire passage holes 3 that are matched one-to-one with the fixing devices 2.

[0036] The aforementioned fixing device 2 is used to clamp the magnetic ring 4, and each power line passing through the wire hole 3 passes through the magnetic ring on the matching fixing device 2.

[0037] Through the above design, this utility model can firstly achieve the installation and fixation of the magnetic ring 4 at the power supply end through the fixing device 2, and secondly, it can also allow each power line passing through the wire hole 3 to pass through the magnetic ring 4.

[0038] As mentioned above, by having the wire hole 3 pass through the magnetic ring 4, the electromagnetic compatibility performance can be improved, and the electromagnetic interference of electronic equipment can be reduced. In other words, this setting can solve the problem of device radiation and leakage in the prior art, which leads to device malfunction and transmission errors.

[0039] Please refer to Figures 1 and 2. In this utility model, the fixing device 2 includes two clamping members 21 arranged opposite to each other. Each clamping member 21 is installed on the protective body 1, and the side facing the other clamping member 21 is an arc surface.

[0040] The space between the curved surfaces of the two clamping members 21 matches the outer contour of the magnetic ring 4.

[0041] In the above-mentioned configuration, the fixing device 2 is divided into two parts for easy disassembly and installation. If a single integrated structure is used, the magnetic ring 4 needs to be installed in the fixing device 2 before wiring, and when the magnetic ring 4 needs to be disassembled, the entire fixing device 2 needs to be disassembled, which is very troublesome.

[0042] In this utility model, the fixing device 2 is divided into two clamping members 21. The magnetic ring 4 can be clamped through the space between the two clamping members 21. Moreover, the middle part of the two clamping members 21 is not connected, which makes it easy to pick up and put down the magnetic ring.

[0043] Here, one side of the clamping member 21 is set as an arc surface to match the outer contour of the magnetic ring 4. Since the outer contour of the magnetic ring 4 is circular, setting one side of the clamping member 21 as an arc surface in this invention is equivalent to limiting the magnetic ring 4, which can achieve a better clamping effect. At the same time, setting one side of the clamping member 21 as an arc surface allows the magnetic ring 4 to fit tightly against the inner wall of the clamping member 21 when it is installed. At this time, the friction between the magnetic ring 4 and the inner wall of the clamping member 21 is small, which will not cause wear to the clamping member 21.

[0044] Please refer to Figure 2. The fixing device 2 in the protective device for improving electrical safety and electromagnetic compatibility performance proposed in this utility model also includes a plurality of supporting ribs 22 installed on the protective body 1.

[0045] The support ribs 22 are distributed on the upper or lower part of the clamping member 21, and a gap is provided between two adjacent support ribs 22 to accommodate the power line passing through.

[0046] Air conditioners typically have multiple power cords. If left unrestricted, these cords can become tangled and interfere with each other, affecting the detection of after-sales faults. This invention provides multiple supporting ribs 22, with gaps between adjacent supporting ribs 22 to allow power cords to pass through. This allows the power cords to be routed by passing sequentially through the gap at the top of the clamping member 21, the magnetic ring 4 between the two clamping members 21, the gap at the bottom of the clamping member 21, and the wire hole at the bottom of the fixing device 2, thus avoiding interference between the power cords.

[0047] In addition, the above-mentioned multiple support ribs 22 are also used to prevent the magnetic ring 4 from falling off. Although the space formed between the two clamping members 21 can hold the magnetic ring 4 well, in actual setup, in order to facilitate the assembly of the magnetic ring 4, or due to reasons such as rising weather temperature, the space between the two clamping members 21 may be slightly larger than the outer contour of the magnetic ring 4. If the above-mentioned support ribs 22 are not added, the magnetic ring 4 can easily fall off from the space between the two clamping members 21 in both the up and down directions.

[0048] After adding the aforementioned support ribs 22, the magnetic ring 4 will be restricted by the support ribs 22 when it moves in both the up and down directions, thereby preventing it from falling off and ensuring the good fixation of the magnetic ring 4.

[0049] Please refer to Figures 3 and 4. In this utility model, the protective body 1 has a groove-shaped structure.

[0050] The protective device also includes a protective outer cover 5 that is assembled with the protective body 1 to form a receiving cavity for the groove-shaped structure;

[0051] The groove structure here refers to a groove in the middle of the protective body 1. The groove generally has a certain depth and inner wall. The purpose of this design is to form a certain space for the installation and placement of the power cord, fixing device 2, magnetic ring 4, etc.

[0052] In addition, the protective cover 5 is provided here for two purposes: firstly, to form the aforementioned cavity for the installation and placement of the power cord, fixing device 2, magnetic ring 4, etc.; secondly, to protect against rain and prevent external rainwater from entering the cavity and damaging the components and power cord.

[0053] Please refer to Figures 1 and 2. In this utility model, the above-mentioned wire hole 3 is set on one side wall of the protective body 1. Multiple hollow ribs are also provided on the side wall where the wire hole 3 is installed. The gap between two adjacent hollow ribs forms a ventilation and heat dissipation hole 6.

[0054] After the above settings, the ventilation and heat dissipation holes 6 will be located in the middle of the two wire holes 3 and on the same side wall (here the structure of the protective body 1 is the groove structure as described above, the groove in this utility model is square and has four side walls). Since the power cord will also generate a certain amount of heat during the operation of the air conditioner, the ventilation and heat dissipation holes 6 can fully exchange heat with the power cord under this setting, thereby ensuring the normal temperature inside the cavity.

[0055] In addition, the present invention provides waterproof baffles on both sides of the fixing device 2, and sets the ventilation and heat dissipation hole 6 in the middle of the corresponding wire passage hole of the two fixing devices 2, which can prevent rainwater from splashing onto the live parts of the wiring area through the ventilation and heat dissipation hole 6.

[0056] Please refer to Figure 3. This utility model also includes at least one screw hole 7 provided on the protective body 1, and the protective outer cover 5 is assembled with the protective body 1 through the screw hole 7.

[0057] The aforementioned screw hole 7 is used for screw fixing of the protective body 1 and the protective outer cover 5. Its fixing effect is reliable. This fixing method allows the slender shape of the screw to pass through the small hole and provides reliable fastening force to maintain the position and posture of the parts.

[0058] Please refer to Figures 3 and 4. This utility model also includes a handle 8 disposed on the protective outer cover 5.

[0059] The purpose of providing the handle 8 in this utility model is to facilitate disassembly and installation.

[0060] Furthermore, in this invention, the diameter of the wire hole 3 is smaller than the diameter of the magnetic ring 4.

[0061] In actual assembly, due to the certain thickness of the inner wall of the magnetic ring 4, the actual area of ​​the magnetic ring 4 used for passing through the power cord will be reduced to a certain extent. At the same time, the setting of the support rib 22 will also restrict the routing of the power cord. Therefore, in this utility model, setting the diameter of the wire passage hole 3 to be smaller than the diameter of the magnetic ring 4 can save the area occupied by the wire passage hole 3 to a certain extent. As mentioned above, the wire passage hole 3 and the ventilation and heat dissipation hole 6 are set on the same side wall. After saving the area of ​​the wire passage hole 3, more ventilation and heat dissipation holes 6 can be set, thereby ensuring the overall heat dissipation circulation in the cavity.

[0062] Based on the above-mentioned settings, this utility model also proposes an air conditioner that has the aforementioned protective device for improving electrical safety and electromagnetic compatibility performance.

[0063] Furthermore, in this utility model, the protective device is installed on the outdoor unit of the air conditioner, and a waterproof baffle 9 is also provided at the installation point of the protective device and the housing of the outdoor unit of the air conditioner.

[0064] In this utility model, the protective device for improving electrical safety and electromagnetic compatibility performance is provided with two waterproof baffles 9 on both sides of the protective device. The baffles 9 are connected to the sheet metal edges of the hollow wiring window on the side panel of the air conditioner outdoor unit. The gap depth between the inner and outer waterproof baffles 9 is slightly greater than the thickness of the sheet metal edge of the air conditioner outdoor unit side panel. When the protective device for improving electrical safety and electromagnetic compatibility performance is installed, the inner and outer waterproof baffles 9 move upward along the sheet metal edge of the air conditioner outdoor unit side panel. The inner and outer waterproof baffles 9 and the sheet metal edge of the air conditioner outdoor unit side panel prevent rainwater from entering.

[0065] Please refer to Figures 5 and 6. The protective device for improving electrical safety and electromagnetic compatibility features a power line wrapped around a magnetic ring 4. After the power line is wrapped around the magnetic ring 4, it acts as an attenuation filter. The magnetic ring 4 has a high initial permeability in terms of anti-interference. Using a high-impedance magnetic ring results in a larger attenuation and better effect. Air conditioners, as an important source of interference during normal use, transmit interference outwards and are also subject to interference from the wiring and other appliances in the space. The current spectrum of a certain unit's power line without the magnetic ring 4 is shown in Figure 5 below. Its emission value is highest at 13.33MHz, at 84.78dB.

[0066] Please refer to Figure 6. After the magnetic ring 4 is wound around the power line, the emission value at the highest current spectrum of 13.33MHz is 23.5dB. The closer to the unit side after the magnetic ring is wound, the higher the attenuation (the higher the impedance of the magnetic ring, the greater the attenuation).

[0067] Based on the fact that the loss of magnetic ring 4 is related to the magnetic ring impedance, the interference source impedance and the propagation distance, according to the magnetic ring 4 connection loss A(dB) = ln(L magnetic ring impedance / R interference source impedance-S propagation distance), on the power supply connection side close to the whole machine interference source, passing all phase wires of the power line through the magnetic ring and fixing it has a significant effect on improving electromagnetic compatibility.

[0068] The specific installation method of this utility model is as follows:

[0069] During assembly, connect the power cord, thread the magnetic ring 4 around it and fix the magnetic ring 4 inside the fixing device 2. The power cord exits through the fixing device 2 and the wire hole 3.

[0070] The waterproof baffles 9 on both sides of the protective device enhance electrical safety and electromagnetic compatibility performance. The gap extends upwards along the sheet metal of the outdoor unit side panel of the air conditioner until the screw holes 7 are aligned with the sheet metal holes. Tightening the screws completes the installation.

[0071] In summary, compared with the prior art, the present invention has at least the following beneficial effects:

[0072] 1. This utility model has a fixing device on the protective body. The fixing device can fix the magnetic ring, so that the power line can pass through the magnetic ring, thereby improving electromagnetic compatibility performance and reducing electromagnetic interference of electronic equipment.

[0073] 2. This utility model has waterproof baffles on both sides of the fixing device, and the ventilation and heat dissipation holes are set in the middle of the corresponding wire passage holes of the two fixing devices, which can prevent rainwater from splashing onto the live parts in the wiring area through the ventilation and heat dissipation holes.

[0074] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A protective device for improving electrical safety and electromagnetic compatibility performance, comprising a protective body (1), characterized in that, It also includes at least one fixing device (2) installed on the protective body (1) and wire passage holes (3) that are matched with the fixing device (2); the fixing device (2) holds a magnetic ring (4), and each power line passing through the wire passage hole (3) passes through the magnetic ring (4) on the fixing device (2) that matches it.

2. The protective device for improving electrical safety and electromagnetic compatibility performance according to claim 1, characterized in that, The fixing device (2) includes two clamping members (21) arranged opposite to each other. Each clamping member (21) is mounted on the protective body (1), and the side facing the other clamping member (21) is an arc surface. The space between the arc surfaces of the two clamping members (21) matches the outer contour of the magnetic ring (4).

3. The protective device for improving electrical safety and electromagnetic compatibility performance according to claim 2, characterized in that, The fixing device (2) also includes a plurality of support ribs (22) installed on the protective body (1); the support ribs (22) are distributed on the upper or lower part of the clamping member (21), and a gap is provided between two adjacent support ribs (22) to accommodate the power line passing through.

4. The protective device for improving electrical safety and electromagnetic compatibility performance according to claim 1, characterized in that, The protective body (1) has a groove-shaped structure; the protective device also includes a protective cover (5) assembled with the protective body (1) to form a receiving cavity for the groove-shaped structure.

5. The protective device for improving electrical safety and electromagnetic compatibility performance according to claim 4, characterized in that, The wire hole (3) is provided on one side wall of the protective body (1). Multiple hollow ribs are also provided on the side wall where the wire hole (3) is installed. The gap between two adjacent hollow ribs forms a ventilation and heat dissipation hole (6).

6. The protective device for improving electrical safety and electromagnetic compatibility performance according to claim 4, characterized in that, It also includes at least one screw hole (7) provided on the protective body (1), and the protective cover (5) is assembled with the protective body (1) through the screw hole (7).

7. The protective device for improving electrical safety and electromagnetic compatibility performance according to claim 4, characterized in that, It also includes a handle (8) provided on the protective cover (5).

8. The protective device for improving electrical safety and electromagnetic compatibility performance according to claim 1, characterized in that, The diameter of the wire hole (3) is smaller than the diameter of the magnetic ring (4).

9. An air conditioner, characterized in that, The air conditioner has a protective device as described in any one of claims 1 to 8 to enhance electrical safety and electromagnetic compatibility performance.

10. The air conditioner according to claim 9, characterized in that, The protective device is installed on the outdoor unit of the air conditioner, and a waterproof baffle (9) is also provided at the installation location between the protective device and the outdoor unit casing of the air conditioner.

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