Ampere meter with automatic power-off protection function
By introducing protective structures such as power-off protectors, mini fans, and heat dissipation fins into the ammeter, the problem that existing ammeters cannot dissipate heat and moisture is solved, and better protection effect is achieved to prevent short circuits and damage.
Patent Information
- Application Number
- CN202323456298.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-19
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2033-12-19
AI Technical Summary
The existing ammeter with automatic power-off protection function has insufficient protection effect, which cannot assist the meter body to dissipate heat and cannot protect the ammeter moisture, which is prone to short-circuit or damage due to moisture and dust.
A protective structure including a power-off protector, a mini fan, a heat-sinking fin, a fine-hole mesh, a drying box, a moisture-absorbing layer, a corner guard plate and a damper was designed. The power-off protector was overloaded and used for use of a mini fan. and heat dissipation fins speed up heat exchange, fine-hole mesh blocks dust, drying boxes and moisture absorbing layers absorb moisture, corner guards and dampers prevent falling.
It realizes overload protection of ammeters, accelerates heat dissipation efficiency, prevents dust and moisture from invading, and prevents falling and damage, and improves the overall protection effect of ammeters.
Smart Images
Figure CN222299696U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ammeters, in particular to an ammeter with an automatic power-off protection function. Background Art
[0002] An ammeter is an instrument used to measure the current in AC and DC circuits. In the circuit diagram, the symbol of the ammeter is "circle A", and the current value is in "ampere" or "A" as the standard unit. The ammeter is made based on the effect of magnetic field force on the current-carrying conductor in the magnetic field. There is a permanent magnet inside the ammeter, which generates a magnetic field between the poles. There is a coil in the magnetic field, with a hairspring spring at each end of the coil. Each spring is connected to a terminal of the ammeter, and a rotating shaft connects the spring and the coil. At the front end of the rotating shaft relative to the ammeter, there is a pointer. When current passes through, the current passes through the magnetic field along the spring and the rotating shaft, and the current cuts the magnetic lines of flux. Therefore, the coil is deflected by the effect of the magnetic field force, driving the rotating shaft and the pointer to deflect. Since the magnitude of the magnetic field force increases with the increase of current, the magnitude of the current can be observed by the degree of deflection of the pointer. This is called a magnetoelectric ammeter.
[0003] After searching, it is found that an ammeter with an automatic power-off protection function is disclosed in a utility model patent with Chinese patent publication number CN215894734U. The ammeter in the utility model patent is to penetrate the connecting wire through the cutter at the end of the conductive sheet, remove the insulation skin on the outside of the connecting wire, directly contact the wire core inside the connecting wire, and form a path between the cutter, the conductive sheet, the conductive wire, the conductive plate and the overload protector, thereby realizing circuit overload protection. However, the function of the cable insulation layer is to isolate the conductive wire core inside the cable from the external environment or other adjacent conductors to avoid short circuit of the conductive structure. However, the ammeter device just cuts off the insulation skin on the outside of the connecting wire, exposes the internal conductive part to the external environment, and contacts and connects with the conductive sheet, the conductive wire and the conductive plate. Once the internal wire core contacts with external water vapor and dust or other conductive parts, it is likely to directly cause the ammeter to short-circuit or even be damaged. At the same time, the ammeter is not provided with a related moisture-proof and heat-dissipating auxiliary structure, so the protection effect needs to be further improved. Therefore, an ammeter with an automatic power-off protection function is proposed. Utility Model Content
[0004] In view of the shortcomings of the prior art, the utility model provides an ammeter with automatic power-off protection function, which has the advantages of power-off protection and moisture-proof and heat-dissipating, and solves the problem that the ammeter with automatic power-off protection function in the above-mentioned background technology cannot assist the meter body in heat dissipation and cannot protect the ammeter from moisture.
[0005] To achieve the above object, the utility model provides the following technical solutions: an ammeter with automatic power-off protection function, comprising an ammeter body, a protective structure is arranged inside the ammeter body, a reading disk is arranged on the front of the ammeter body, a digital display screen is arranged on the front of the ammeter body, and a terminal is fixedly connected to the front of the ammeter body;
[0006] The protective structure includes a power-off protector, a micro fan, heat dissipation fins, a fine-mesh gauze, a drying box, a moisture absorption layer, a corner plate, and a damper. The inner bottom wall of the ammeter body is fixedly installed with a power-off protector, the inner rear wall of the ammeter body is fixedly installed with a micro fan, the interior of the ammeter body is fixedly connected with heat dissipation fins, the interior of the ammeter body is fixedly connected with a fine-mesh gauze, the exterior of the ammeter body is fixedly connected with a drying box, the interior of the ammeter body is fixedly connected with a moisture absorption layer, the exterior of the ammeter body is fixedly connected with a corner plate, and the interior of the corner plate is fixedly connected with a damper.
[0007] Furthermore, the internal electrical control of the power-off protector has a power-off protection circuit, and the left and right sides of the power-off protector are fixedly connected with wiring terminals, and the two wiring terminals are electrically connected to the ammeter body through wires.
[0008] Furthermore, a No. 1 wind slot is opened on the inner rear wall of the ammeter body, the micro fan is located inside the No. 1 wind slot, a No. 2 wind slot is opened on the inner left wall and the inner right wall of the ammeter body, and the number of the heat dissipation fins is two, which are respectively located inside the two No. 2 wind slots.
[0009] Furthermore, the number of the fine-pore gauze is three, one of which is located in front of the No. 1 air slot, and the other two fine-pore gauze are located on the opposite sides of the two No. 2 air slots, respectively.
[0010] Furthermore, there are two drying boxes, which are respectively located on opposite sides of the two No. 2 air ducts. The inner top walls of the two drying boxes are provided with feeding ports, and the internal threads of the feeding ports are connected with button plugs. The inner left walls and the inner right walls of the two drying boxes are provided with a number of air holes distributed in a circular array.
[0011] Furthermore, dry silica gel particles are placed inside the two drying boxes, and the inner bottom walls of the two drying boxes are slidably connected with a drawer plate. The moisture absorption layer is a water-absorbent cotton fiber structure. The number of the corner guards is eight, and they are respectively located at the top four corners and the bottom four corners of the ammeter body.
[0012] Beneficial Effects
[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:
[0014] The ammeter with automatic power-off protection function connects the internal circuit of the ammeter with the power-off protector, and uses the power-off protection circuit of the power-off protector to protect the meter body from overload. At the same time, a micro fan and heat dissipation fins are added inside the ammeter body to speed up the heat exchange efficiency inside the meter body. At the same time, a fine-mesh mesh is used to block dust from entering. A drying box and a moisture-absorbing layer are respectively arranged at the ventilation trough part and inside the ammeter to absorb moisture and protect the interior from being affected by water vapor. Corner plates and dampers are arranged at the convex corners of the ammeter body to prevent the ammeter body from falling and being damaged, thereby achieving a protective effect on the ammeter. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a front view of the structure of the utility model;
[0016] Figure 2 This is a cross-sectional view of the structure of the utility model;
[0017] Figure 3 It is the left view of the structure of the utility model.
[0018] In the figure: 1. ammeter body; 2. protective structure; 201. power-off protector; 202. micro fan; 203. cooling fins; 204. fine mesh; 205. drying box; 206. moisture absorption layer; 207. corner plate; 208. damper; 3. reading disk; 4. digital display screen; 5. terminal. DETAILED DESCRIPTION
[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0020] See also Figure 1-3 An ammeter with automatic power-off protection function includes an ammeter body 1, a protective structure 2 is arranged inside the ammeter body 1, a reading disk 3 is arranged on the front of the ammeter body 1, and a digital display screen 4 is arranged on the front of the ammeter body 1. The reading disk 3 and the digital display screen 4 are both measurement data reading structures of the ammeter, and a terminal 5 is fixedly connected to the front of the ammeter body 1, and the terminal 5 is connected to a device to be measured through a wire.
[0021] The protective structure 2 includes a power-off protector 201, a micro fan 202, a heat dissipation fin 203, a fine mesh 204, a drying box 205, a moisture absorption layer 206, a corner plate 207, and a damper 208. The inner bottom wall of the ammeter body 1 is fixedly installed with a power-off protector 201, and the power-off protector 201 protects the ammeter from overload. The inner rear wall of the ammeter body 1 is fixedly installed with a micro fan 202, and the interior of the ammeter body 1 is fixedly connected with a heat dissipation fin 203. The micro fan 202 and the heat dissipation fin 203 improve the heat exchange efficiency. A fine-mesh gauze 204 is fixedly connected to the inside of the ammeter body 1 to isolate dust. A drying box 205 is fixedly connected to the outside of the ammeter body 1. Dry silica gel particles are inside the drying box 205 to absorb moisture. A hygroscopic layer 206 is fixedly connected to the inside of the ammeter body 1. The hygroscopic layer 206 is a water-absorbing cotton fiber structure. A corner guard 207 is fixedly connected to the outside of the ammeter body 1 to the inside of the corner guard 207 to which a damper 208 is fixedly connected. The corner guard 207 and the damper 208 protect the ammeter to prevent it from falling and being damaged.
[0022] When implementing, follow these steps:
[0023] 1) First, use the power-off protector 201 to connect to the internal circuit of the ammeter to protect the circuit from overload;
[0024] 2) Then, the micro fan 202 and the heat dissipation fins 203 in the air trough are used to increase the heat dissipation efficiency inside the meter body;
[0025] 3) The fine mesh 204 is used to prevent dust from entering, and the dry silica gel particles and the moisture absorption layer 206 inside the drying box 205 are used to absorb the internal moisture;
[0026] 4) Finally, the corner plates 207 and the dampers 208 are used to protect the top four corners and the bottom four corners of the ammeter body 1 to avoid damage due to falling.
[0027] according to Figure 1 and Figure 2 As shown, the connection terminals on the left and right sides of the power-off protector 201 are electrically connected to the internal circuit of the ammeter body 1 through wires, and the power-off protection circuit inside the power-off protector 201 cooperates to protect the ammeter body 1 from overload.
[0028] according to Figure 2 As shown, the micro fan 202 is located in the No. 1 wind slot on the rear wall of the ammeter body 1, and the two heat dissipation fins 203 are respectively located in the No. 2 wind slots on the left wall and the right wall of the ammeter body 1, which can speed up the heat exchange efficiency inside the ammeter body 1.
[0029] according to Figure 2As shown, three fine-pore screens 204 are respectively located on one side of the No. 1 air slot and the No. 2 air slot close to the inside of the ammeter body 1, which can prevent dust from entering the inside of the meter body.
[0030] according to Figure 2 and Figure 3 As shown, the two drying boxes 205 are respectively located on the opposite sides of the two No. 2 air ducts, and dry silica gel particles can be added through the feeding port on the top of the drying box 205 for use as a desiccant. At the same time, the inner left wall and the inner right wall of the drying box 205 are provided with a number of air holes distributed in a circular array, which can ensure the ventilation effect of the two No. 2 air ducts.
[0031] according to Figure 2 and Figure 3 As shown, by pulling out the drawer plate on the inner bottom wall of the drying box 205, the expired dry silica gel particles can be replaced in time, and the moisture-absorbing layer 206 made of absorbent cotton fiber material can be used to absorb internal moisture. The corner guard plates 207 and the dampers 208 are respectively located at the top four corners and the bottom four corners of the ammeter body 1 to achieve anti-fall protection.
[0032] To summarize, the ammeter with automatic power-off protection function connects the internal circuit of the ammeter to the power-off protector 201, and uses the power-off protection circuit of the power-off protector 201 to protect the meter body from overload. At the same time, a micro fan 202 and a heat dissipation fin 203 are added to the interior of the ammeter body 1 to speed up the heat exchange efficiency inside the meter body. At the same time, a fine-mesh gauze 204 is used to block dust from entering. A drying box 205 and a moisture-absorbing layer 206 are respectively arranged in the ventilation trough area and inside the ammeter to absorb moisture and protect the interior from the influence of water vapor. A corner plate 207 and a damper 208 are arranged at the convex corner of the ammeter body 1 to prevent the ammeter body 1 from falling and being damaged, thereby achieving a protective effect on the ammeter, and solving the problem that the ammeter with automatic power-off protection function in the above-mentioned background technology cannot assist the meter body in heat dissipation and cannot provide moisture-proof protection for the ammeter.
[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0034] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. An ammeter with an automatic power-off protection function, comprising an ammeter body (1), characterized in that: A protective structure (2) is arranged inside the ammeter body (1), a reading disk (3) is arranged on the front of the ammeter body (1), a digital display screen (4) is arranged on the front of the ammeter body (1), and a terminal (5) is fixedly connected to the front of the ammeter body (1); The protective structure (2) comprises a power-off protector (201), a micro fan (202), a heat dissipation fin (203), a fine mesh screen (204), a drying box (205), a moisture absorbing layer (206), a corner plate (207), and a damper (208); the power-off protector (201) is fixedly mounted on the inner bottom wall of the ammeter body (1); the micro fan (202) is fixedly mounted on the inner rear wall of the ammeter body (1); and the ammeter body ( 1) is fixedly connected to a heat dissipation fin (203) inside, a fine mesh gauze (204) is fixedly connected to the inside of the ammeter body (1), a drying box (205) is fixedly connected to the outside of the ammeter body (1), a moisture absorption layer (206) is fixedly connected to the inside of the ammeter body (1), a corner plate (207) is fixedly connected to the outside of the ammeter body (1), and a damper (208) is fixedly connected to the inside of the corner plate (207).
2. The ammeter with automatic power-off protection function according to claim 1, characterized in that: The internal electrical control of the power-off protector (201) includes a power-off protection circuit, and both left and right sides of the power-off protector (201) are fixedly connected with wiring terminals, and both wiring terminals are electrically connected to the ammeter body (1) via wires.
3. The ammeter with automatic power-off protection function according to claim 1, characterized in that: The inner rear wall of the ammeter body (1) is provided with a No. 1 air slot, the micro fan (202) is located inside the No. 1 air slot, the inner left wall and the inner right wall of the ammeter body (1) are both provided with a No. 2 air slot, and the number of the heat dissipation fins (203) is two, and they are respectively located inside the two No. 2 air slots.
4. The ammeter with automatic power-off protection function according to claim 3 is characterized in that: The number of the fine-mesh screens (204) is three, one of which is located at the front of the No. 1 air slot, and the other two fine-mesh screens (204) are located at opposite sides of the two No. 2 air slots, respectively.
5. The ammeter with automatic power-off protection function according to claim 4, characterized in that: There are two drying boxes (205), which are respectively located on opposite sides of the two No. 2 air ducts. The inner top walls of the two drying boxes (205) are provided with a feeding port, and the internal threads of the feeding port are connected with a button plug. The inner left wall and the inner right wall of the two drying boxes (205) are provided with a plurality of air holes distributed in a circular array.
6. The ammeter with automatic power-off protection function according to claim 1, characterized in that: Dry silica gel particles are placed inside the two drying boxes (205), and the inner bottom walls of the two drying boxes (205) are slidably connected with a pumping plate, the moisture absorption layer (206) is a water-absorbing cotton fiber structure, and the number of the corner guards (207) is eight, and they are respectively located at the top four corners and the bottom four corners of the ammeter body (1).