An arc-free switch

Abstract

This utility model discloses an arc-free switch, relating to the fields of electrical appliances and automation and intelligent control technology, to solve the problem of arcing during the switching process of existing switches, relays, and AC contactors. The arc-free switch includes at least: a first electrode, a second electrode, an arc-suppressing resistor structure, and a main switch; the arc-suppressing resistor structure is connected in parallel with the main switch between the first and second electrodes; thereby ensuring that at the instant the arc-suppressing resistor structure circuit is connected, the electrical clearance between the main switch contacts is a preset standard electrical clearance, making the internal resistance value between the main switch contacts greater than the upper limit of the arc-suppressing internal resistance range; thus enabling the switch to be switched on and off in an arc-free state.

Description

[0001] This application claims priority to Chinese Patent Application No. 202521341100.0, filed on June 27, 2025, entitled “An Arc-Free Switch”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This utility model relates to the fields of electrical appliances and automation and intelligent control technology, and in particular to an arc-free switch. Background Technology

[0003] Existing switches or contactors generate arcing during both opening and closing, which can cause the following hazards and safety risks: 1. The instantaneous high temperature and heat generated by arcing can damage circuits and electrical equipment, and may even frequently cause fires. 2. This arcing phenomenon generates instantaneous high-frequency pulses, which have a particularly significant impact on circuits, especially on automatic control circuits, programmable circuits, and intelligent circuits that rely on input signals for control. 3. Arcing can severely damage switch contacts, directly affecting the load-carrying capacity and service life of the execution circuit.

[0004] Therefore, in order to further extend the service life of switches, relays and contactors, and improve the safety of switches, relays and contactors during use, it is urgent to design a switch structure with better arc suppression performance, which can better solve the arc initiation problem in the switching process of existing technologies. Utility Model Content

[0005] The purpose of this invention is to provide an arc-free switch, which can fundamentally and completely solve the problem of arcing during the switching process.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An arc-free switch, comprising:

[0008] The first electrode, the second electrode, the arc suppression resistor structure, and the main switch;

[0009] The arc-suppressing resistor structure is connected in parallel with the main switch between the first electrode and the second electrode.

[0010] An arc-free switch, wherein the arc-suppressing resistor structure may include an arc-suppressing auxiliary switch and a graded arc-suppressing resistor;

[0011] The arc-suppression auxiliary switch is connected in series with the graded arc-suppression resistor, and then connected in parallel with the main switch between the first electrode and the second electrode.

[0012] An arc-free switch may include: an active contact, an auxiliary active contact, a main stationary contact, a graded arc-suppressing resistor, and rivets;

[0013] The active contact and the auxiliary active contact are integrally connected at their centers to form an active contact; the main fixed contact and the graded arc-suppressing resistor are integrally connected to form a fixed contact; one active contact and two mutually insulated fixed contacts are respectively disposed in different corresponding positions to form the arc-free switch; wherein the active contact and the fixed contact respectively constitute the auxiliary switch, the arc-suppressing resistor structure and the main switch of the arc-free switch, and the two mutually insulated fixed contacts respectively constitute the first electrode and the second electrode of the arc-free switch;

[0014] The cross-sectional shape of the auxiliary contact piece includes at least one or more of the following: rectangular, arc-shaped, wavy, or sawtooth.

[0015] The target positions at both ends of the auxiliary contact piece are either not provided with silver contacts or are provided with silver contacts.

[0016] An arc-free switch, wherein the arc-free switch is configured as a double-contact switch, or may be configured as a single-contact switch.

[0017] When the arc-free switch is a switch for an arc-free relay, the arc-free relay may include:

[0018] Arc-free switch, first control terminal of relay, second control terminal of relay, relay control system, relay drive system and relay housing;

[0019] The arc-free switch is positioned at the corresponding location of the arc-free relay.

[0020] An arc-free switch, wherein the arc-free switch is configured as a regular switch, or may be configured as an arc-free relay.

[0021] Compared with the prior art, the arc-free switch provided by this utility model sets up a main switch and an arc-suppressing resistor structure in parallel between the first electrode and the second electrode. When the arc-free switch is closed, the arc-suppressing resistor structure closes first, followed by the main switch; when it is opened, the main switch opens first, followed by the arc-suppressing resistor structure. At the instant the arc-suppressing resistor structure circuit is connected, it ensures that the electrical clearance between the main switch contacts is a preset standard electrical clearance, making the internal resistance value between the main switch contacts greater than the upper limit of the arc-initiating internal resistance range. Therefore, no arc is generated when the main switch is closed. Similarly, when the arc-free switch is opened, because the main switch contacts... The internal resistance value of the switch between them is always greater than the upper limit of the arc-starting internal resistance range of the switch, so no arc will occur. At the same time, the resistance value of the graded arc-suppressing resistor is determined according to preset conditions, such as the power supply, load power, insulating gas, and actual needs, so that the internal resistance value of the arc-suppressing resistor structure is less than the upper limit of the arc-starting internal resistance range of the main switch. It can also ensure that the current passing through the arc-suppressing resistor structure is the arc-limiting current, which can reduce the arc-starting internal resistance range of the arc-free switch to the minimum range, thereby fundamentally and completely solving the arc-starting problem of ordinary switches, various relays, and AC contactors during the switching process. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0023] Figure 1 A schematic diagram of the basic circuit structure of an arc-free switch provided by this utility model;

[0024] Figure 2 A circuit diagram of an arc-suppressing resistor structure in an arc-free switch provided by this utility model;

[0025] Figure 3 A circuit structure diagram of an arc-free switch with a relay switch structure provided by this utility model;

[0026] Figure 4 This utility model provides a structural schematic diagram of an arc-free switch when it is disconnected.

[0027] Figure 5 A schematic diagram of the arc-suppressing resistor structure of an arc-free switch when closed, provided by this utility model;

[0028] Figure 6 This utility model provides a schematic diagram of the structure of the fixed contact in an arc-free switch;

[0029] Figure 7 Schematic diagram of two connection structures of active contact and auxiliary contact in an arc-free switch provided by this utility model;

[0030] Figure 8 Schematic diagrams of three design structures for the auxiliary contact piece in an arc-free switch provided by this utility model;

[0031] Figure 9 A schematic diagram of a switch disconnection circuit structure for an arc-free switch with a relay switch structure provided by this utility model;

[0032] Figure 10 A schematic diagram of a switch closure circuit structure for an arc-free switch that is a relay switch structure provided by this utility model;

[0033] Figure 11 A schematic diagram of a non-arc switch under load provided by this utility model;

[0034] Figure 12 This utility model provides a schematic diagram of a load-carrying circuit for an arc-free switch that is a relay switch structure.

[0035] Reference numerals in the attached diagram: P1-first electrode, P2-second electrode, R-arc suppression resistor structure, CJK-main switch, CJf-arc suppression auxiliary switch, R1-graded arc suppression resistor, CJ-relay control system, a-relay first control terminal, b-relay second control terminal, 1-active contact, 2-auxiliary active contact, 3-main fixed contact, 4-rivet, 5-relay housing, 6-positioning spring, 7-wiring screw, 8-moving magnet, 9-movable bracket, 10-coil, 11-fixed magnet, 20-first electrical contact, 30-second electrical contact, Uc-power supply, YD-load. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0037] Currently, finding a complete solution to the hazards of arcing in switches and relays remains a challenge for countries worldwide. The main technical solutions can be summarized as follows:

[0038] 1. Vacuum relay arc suppression technology: It has a good arc suppression effect, but its structure and manufacturing process are complex and the price is high. At present, it is mainly used in aerospace, aviation and underground explosion protection applications.

[0039] 2. The thyristor and solid-state relay technology is an arc-free switch with excellent arc suppression effect, but it generates a lot of heat during use, requiring the installation of a large heat sink. In addition, the overload current allowed by the thyristor is usually 3 times the rated current, while the circuit starting current is required to be 3 to 7 times the rated current under normal conditions. Especially when the circuit load is an inductive load such as an AC motor, the application of thyristors and solid-state relays is far less extensive than that of ordinary AC contactors and ordinary switches.

[0040] 3. The arc-extinguishing technology (including arc initiation and arc transformation) involves improving the switch structure to change the magnetic field strength and arc shape, so that the arc wind generated by arc pulling can dissipate heat and avoid damage to the switch contacts. However, the arc-extinguishing effect of this technology is not ideal, and its structure and manufacturing process are complex, resulting in a low cost-performance ratio.

[0041] 4. Shielding technology solution: The characteristic of this technology solution is that when the arc-free relay arcs, it uses a special structure to release inert gas or insulating film to isolate the arc-arc region, which plays a certain role in arc suppression. However, its arc suppression effect is not ideal, and its structure and process are very complex, resulting in a low cost-performance ratio.

[0042] 5. Dual-point synchronous arc suppression technology: This technology reduces the contact conduction time by improving the switch structure and manufacturing process, thereby achieving the purpose of arc suppression. This technology is simple and practical, and is one of the most widely used arc suppression technologies in the world. However, the arc suppression effect is not ideal.

[0043] 6. Complementary circuit arc suppression technology: This technology utilizes the complementary time difference in response speed between two switches connected in parallel, allowing them to turn on and off instantaneously in turn. As a switching node, combined with the dual-point synchronous arc suppression scheme, its load capacity can be increased by more than 2 times, and its service life can be increased by 3-5 times. Although this arc suppression scheme has a good cost performance, its arc suppression effect is not ideal, so it cannot be used in situations where arc suppression requirements are particularly high.

[0044] It is evident that the above six existing arc suppression solutions all have problems to varying degrees, and have not completely solved the problem of arc initiation during the switching process. Furthermore, the thyristor and solid-state relay technologies are not suitable for switching circuits, and their applications are far less extensive than those of ordinary AC contactors and ordinary switches.

[0045] Therefore, the present invention provides an arc-free switch, please refer to [link / reference]. Figure 1 , Figure 2 and Figure 11 , Figure 1 A schematic diagram of the basic circuit structure of an arc-free switch provided by the present invention; Figure 2 A circuit diagram of an arc-suppressing resistor structure in an arc-free switch provided by the present invention; Figure 11 This is a schematic diagram of a non-arc switch with a load provided by the present invention.

[0046] exist Figure 1 , Figure 2In this circuit, an arc-free switch may include: a first electrode P1, a second electrode P2, an arc-suppressing resistor structure R, and a main switch CJK. One end of the main switch CJK is connected to the first electrode P1, and the other end of the main switch CJK is connected to the second electrode P2. Then, one end of the arc-suppressing resistor structure R is connected to the first electrode P1, and the other end of the arc-suppressing resistor structure R is connected to the second electrode P2. This achieves the parallel connection of the arc-suppressing resistor structure R and the main switch CJK between the first electrode P1 and the second electrode P1. In practical applications, such as... Figure 11 As shown, the first electrode P1 can be connected to the power supply Uc, and the second electrode P2 can be connected to the load YD.

[0047] The present invention also provides an arc extinguishing method, comprising:

[0048] Step 1: During the closing process of the arc-free switch, the arc-suppressing resistor structure R is turned on first, and then the main switch CJK is closed; during the opening process of the arc-free switch, the main switch CJK is opened first, and then the arc-suppressing resistor structure R is opened.

[0049] Step 2: At the instant the arc-suppressing resistor structure R circuit is turned on, ensure that the electrical gap between the main switch CJK contacts is the preset standard electrical gap, so that the internal resistance value between the main switch CJK contacts is greater than the upper limit value Rhd of the internal resistance range of the arc-starting switch; the preset standard electrical gap is greater than or equal to the electrical gap value between the switch contacts specified in the standard.

[0050] Step 3: Determine the resistance value of the graded arc-suppression resistor R1 according to the preset conditions, so that the internal resistance value of the arc-suppression resistor structure R is less than the upper limit value Rhd of the arc-starting internal resistance range of the main switch, and at the same time, it can also ensure that the current through the arc-suppression resistor structure R is the limiting arc-starting current Ix; the preset conditions include power supply, load power, insulating gas and actual requirements.

[0051] The above technical solutions constitute the basic arc extinguishing solution of this invention.

[0052] In practical applications, the arc-extinguishing effect of implementing the basic arc-extinguishing scheme is very significant:

[0053] During the arc-free switch closing process, the arc-suppressing resistor structure R circuit closes first. When closed, since the electrical gap between the contacts of the main switch CJK is preset to a standard electrical gap, the internal resistance value between the contacts of the main switch CJK is greater than the upper limit of the arc-starting internal resistance range of the switch, so the main switch CJK will not start an arc at this time. Then, during the main switch closing process, it is in an arc-free state that meets the actual requirements until it is fully closed.

[0054] During the arc-free switch disconnection process, the main switch CJK disconnects first. When disconnected, the arc-suppressing resistor structure R circuit is still in the conducting state. At this time, the main switch CJK is in the arc-free state that meets the actual requirements. Finally, when the arc-suppressing resistor structure R circuit disconnects, since the current passing through the arc-suppressing resistor structure R circuit is the arc-limiting current Ix, the arc-suppressing resistor structure R will not ignite.

[0055] Furthermore, based on the arc-free switch, the present invention also provides two arc-extinguishing methods for the arc-free switch, which may include:

[0056] Method 1: Correctly and reasonably set the arc-starting current Ix in the arc-free switch; the arc-starting current Ix has two meanings: 1. Control and limit the current value through the arc-suppression resistor structure R by reasonably setting the internal resistance value of the arc-suppression resistor structure R, so as to limit the arc-starting purpose; 2. Under the premise of ensuring that the current through the arc-suppression resistor structure R will not cause the arc-starting phenomenon, reasonably set the internal resistance value of the arc-suppression resistor structure R so that it is less than the upper limit value Rhd of the arc-starting internal resistance range of the main switch, so as to limit the arc-starting purpose.

[0057] Method 2: Correctly and reasonably set the target internal resistance value Rz of the arc-suppressing resistor structure R in the arc-free switch; the meaning of the target internal resistance value Rz of the arc-suppressing resistor structure R is as follows: under the premise of ensuring that the current through the arc-suppressing resistor structure R is the limiting arc-starting current Ix, reasonably set the internal resistance value of the arc-suppressing resistor structure R so that it is less than the maximum upper limit value Rhd of the arc-starting internal resistance range of the main switch CJK, and as close as possible to the lower limit value Rhx of the arc-starting internal resistance range of the main switch CJK, so as to minimize the arc-starting internal resistance range of the main switch CJK and meet the actual requirements; the target internal resistance of the arc-suppressing resistor structure R The resistance value Rz is set based on preset conditions (power supply, load power, insulating gas, actual needs). Under normal circumstances, under the premise that the current through the arc-suppressing resistor structure R is limited to the arc-starting current Ix, when the internal resistance value of the arc-suppressing resistor structure R is set to be less than the upper limit value Rhd of Rh, the smaller the internal resistance value of the arc-suppressing resistor structure R, the greater its shunting effect, resulting in a smaller leakage current Ic between the contacts of the main switch CJK, and a smaller arc-starting internal resistance range of the switch. Therefore, when the target internal resistance value Rz of the arc-suppressing resistor structure R is set, this step arc-starting phenomenon can be limited to a minimum or fundamentally eliminated.

[0058] The two arc-extinguishing methods described above are key elements in further ensuring the arc-extinguishing effect of the arc-free switch of the present invention. Examples are provided below:

[0059] Example 1: Figure 1 , Figure 2In the arc-free switch described in this invention, the power supply Uc can be set to AC 220V, the load YD to a 1KW blower, the insulating gas to ordinary air, and the target resistance value Rz of the arc-extinguishing resistor structure R can be set to 20KΩ. At this time, the arc-starting range of the main switch CJK is 0.01mm, which meets the actual requirements.

[0060] Example 2: Figure 1 , Figure 2 In the arc-free switch described in this invention, the power supply Uc is set to AC 220V, the load YD is a 1KW blower, the insulating gas is ordinary air, and the target resistance value Rz of the arc-suppressing resistor structure R is set to 10KΩ. At this time, the arc-starting range of the main switch CJK approaches 0, which meets the actual requirements. Here, 10KΩ is the target resistance value Rz of the arc-suppressing resistor structure R described in this invention.

[0061] It is obvious that, based on the arc-free switch, the basic arc-extinguishing scheme of the present invention can indeed achieve a very good arc-extinguishing effect; while the further arc-extinguishing technology of the present invention can achieve a more ideal arc-extinguishing effect that meets actual needs, fundamentally solving the problem of arc initiation in the switch.

[0062] In practical applications of the arc-free switch, the upper limit value Rhd of Rh and the target resistance value Rz of the selected arc-suppression resistor structure R will be different due to different working environments, power supplies, insulating gases, load power, and actual requirements. However, the arc-suppression structure and arc-suppression method used can be the same or similar.

[0063] For example, if the arc-free switch is used to power a motor of the same power, and it is operating under AC 220V power supply conditions and AC 110V power supply conditions, although the load power is the same, the voltage applied across the first electrode and the second electrode is different, and the current passing through them will also be different. This determines that the internal resistance value of the arc-suppression resistor structure R we choose will also be different.

[0064] For example, the arc-free switch operates in a dry environment and in a humid environment, and the insulating gas is different, so the internal resistance value between the switch contacts is different. This determines that the internal resistance value of the arc-suppressing resistor structure R we choose is also different.

[0065] For example, the rated current of an AC 220V, 0.5kW motor and an AC 220V, 2kW motor are different, which determines that the current value through the arc-free switch is also different. This also determines that the internal resistance value of the arc-suppression resistor structure R we choose is also different.

[0066] For example, in practical applications, different types and purposes of switches require different arc suppression effects, which determines that the internal resistance value of the arc suppression resistor structure R we choose will also be different, which is quite normal.

[0067] It should be noted that the arc-free switch described in this invention can be configured as a double-contact switch or a single-contact switch. In practical applications, if the first electrode P1 and the second electrode P2 are placed between the two mutually insulated fixed contacts, the arc-free switch is a double-contact switch; if the first electrode P1 and the second electrode P2 are placed between the moving contact and the fixed contact, the arc-free switch is a single-contact switch.

[0068] It should be noted that the arc-free switch described in this invention can be configured as a regular switch, or as a relay or AC contactor switch; for a better explanation, please refer to Embodiment 3.

[0069] Example 3: Please refer to Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 as well as Figure 12 ; Figure 3 This invention provides a circuit structure diagram of an arc-free switch that is a relay switch structure. Figure 4 This invention provides a schematic diagram of the structure of an arc-free switch when it is disconnected. Figure 5 This is a schematic diagram of the arc-suppression resistor structure of an arc-free switch when closed, provided by the present invention. Figure 6 This invention provides a schematic diagram of the structure of a stationary contact in an arc-free switch. Figure 7 This invention provides two schematic diagrams illustrating the connection structures of the active contact and the auxiliary contact in an arc-free switch. Figure 8 Schematic diagrams of three design structures for the auxiliary contact in an arc-free switch provided by the present invention; Figure 9 This invention provides a schematic diagram of a switch disconnection circuit structure for an arc-free switch that is a relay switch structure. Figure 10 This invention provides a schematic diagram of a switch closure circuit structure for an arc-free switch that is a relay switch structure.

[0070] This invention provides an arc-free switch, which, when used as a switch for an arc-free relay, may include:

[0071] Arc-free switch, relay first control terminal a, relay second control terminal b, relay control system CJ, relay drive system and relay housing.

[0072] The arc-free switch includes a graded arc-suppression resistor R1, an active contact 1, an auxiliary contact 2, a main stationary contact 3, a graded arc-suppression resistor R1, and rivets 4; its setting method includes:

[0073] Method 1: The active contact 1 and the auxiliary active contact 2 are integrally connected at their centers to form the active contact; the main fixed contact 3 is integrally connected with the graded arc-suppression resistor R1 to form the fixed contact; one active contact and two mutually insulated fixed contacts are respectively set in different corresponding positions (see [reference]). Figure 4 and Figure 5 Thus, the arc-free switch is formed; wherein the moving contact and the fixed contact respectively constitute the auxiliary switch, the arc-suppressing resistor structure and the main switch of the arc-free switch, and the two mutually insulated fixed contacts respectively constitute the first electrode and the second electrode of the arc-free switch; wherein, the moving contact may include a first electrical contact 20 and the fixed contact may include a second electrical contact 30, and when the first electrical contact 20 contacts the second electrical contact 30, the main switch of the arc-free switch is closed.

[0074] Method 2: The cross-sectional shape of the auxiliary contact piece 2 can be rectangular, arc-shaped, wavy, sawtooth, etc.

[0075] Method 3: There are two ways to set the auxiliary contact 2: 1. Do not set silver contacts at the corresponding positions at both ends; 2. Set silver contacts at the corresponding positions at both ends.

[0076] The arc-free relay control system CJ includes a first control terminal a, a second control terminal b, a relay drive system, and a relay housing 5; the arc-free relay drive system includes a positioning spring 6, a wiring screw 7, a moving magnet 8, a movable bracket 9, a coil 10, a fixed magnet 11, and a support spring 12.

[0077] The movable contact piece is mounted on the movable bracket 9, which is integrally connected to the movable magnet 8 and can move freely up and down; the two fixed contacts are respectively mounted on the housing terminal blocks corresponding to the movable contacts.

[0078] Connect the arc-free relay to the power supply circuit, please refer to [link / reference]. Figure 12 Then press Figure 12 Connect the power supply Uc and the load YD.

[0079] Based on the aforementioned arc-free relay, the present invention provides an arc-extinguishing method for an arc-free relay, which may include:

[0080] Step 1: When the relay control system executes the closing command, the relay drive system drives the arc-free switch to close. During the closing process of the arc-free switch, the arc-suppression auxiliary switch closes first, and then the main switch closes. When the relay control system executes the opening command, the relay drive system drives the arc-free switch to open. The main switch opens first, and then the arc-suppression auxiliary switch opens.

[0081] Step 2: At the instant the arc-suppression auxiliary switch closes, ensure that the electrical clearance between the main switch contacts is a preset standard electrical clearance, so that the internal resistance value between the main switch contacts is greater than the upper limit of the internal resistance range of the arc-starting switch; the preset standard electrical clearance is greater than or equal to the electrical clearance value between the switch contacts specified in the standard.

[0082] Step 3: Determine the resistance value of the graded arc-suppression resistor according to preset conditions, so that the internal resistance value of the arc-suppression resistor structure is less than the upper limit of the arc-starting internal resistance range of the main switch, while also ensuring that the current passing through the arc-suppression resistor structure is the limiting arc-starting current; the preset conditions include power supply, load power, insulating gas and actual requirements.

[0083] Furthermore, based on the aforementioned arc-free switch, the present invention also provides two arc-extinguishing methods for arc-free switches, including:

[0084] Method 1: Correctly and reasonably set the arc-starting current Ix in the arc-free switch; the arc-starting current Ix has two meanings: 1. Control and limit the current value through the arc-suppression resistor structure R by reasonably setting the internal resistance value of the arc-suppression resistor structure R, so as to limit the arc-starting purpose; 2. Under the premise of ensuring that the current through the arc-suppression resistor structure R will not cause the arc phenomenon, reasonably set the internal resistance value of the arc-suppression resistor structure R so that it is less than the upper limit of the arc-starting internal resistance range of the main switch, so as to limit the arc-starting purpose.

[0085] Method 2: Correctly and reasonably set the target internal resistance value Rz of the arc-suppressing resistor structure R in the arc-free switch; the meaning of the target internal resistance value Rz of the arc-suppressing resistor structure R is as follows: under the premise of ensuring that the current through the arc-suppressing resistor structure R is the limiting arc-starting current Ix, reasonably set the internal resistance value of the arc-suppressing resistor structure R so that it is less than the maximum upper limit value Rhd of the arc-starting internal resistance range of the main switch CJK, and as close as possible to the lower limit value Rhx of the arc-starting internal resistance range of the main switch CJK, so as to minimize the arc-starting internal resistance range of the main switch CJK and meet the actual requirements; the target internal resistance of the arc-suppressing resistor structure R The resistance value Rz is set based on preset conditions (power supply, load power, insulating gas, actual needs). Under normal circumstances, under the premise that the current through the arc-suppressing resistor structure R is limited to the arc-starting current Ix, when the internal resistance value of the arc-suppressing resistor structure R is set to be less than the upper limit value Rhd of Rh, the smaller the internal resistance value of the arc-suppressing resistor structure R, the greater its shunting effect, resulting in a smaller leakage current Ic between the contacts of the main switch CJK, and a smaller arc-starting internal resistance range of the switch. Therefore, when the target internal resistance value Rz of the arc-suppressing resistor structure R is set, this step arc-starting phenomenon can be limited to a minimum or fundamentally eliminated.

[0086] The implementation results are as follows:

[0087] Example 4: Please refer to Figure 1 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 12 , Figure 12 This is a schematic diagram of a load-carrying circuit for an arc-free switch that is a relay switch structure, as provided by the present invention. In the arc-free relay of the present invention, the power supply Uc can be set to AC 220V, the load YD to a 1KW blower, and the insulating gas to ordinary air. The target resistance value Rz of the arc-suppression resistor structure R can be set to 20KΩ. At this time, the arc-starting range of the main switch CJK is 0.01mm, which meets the actual requirements.

[0088] Example 5: Please refer to Figure 1 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 12In the arc-free relay of this invention, the power supply Uc is set to AC 220V, the load YD is a 1KW blower, and the insulating gas is ordinary air. The target resistance value Rz of the arc-suppression resistor structure R is set to 10KΩ. At this time, the arc-starting range of the main switch CJK approaches 0, which meets the actual requirements. Here, 10KΩ is the target resistance value Rz of the arc-suppression resistor structure R of this invention.

[0089] It is evident that, based on the arc-free switch, the basic arc-extinguishing scheme described in this invention can indeed achieve a very good arc-extinguishing effect; while the further arc-extinguishing method described in this invention can achieve a more ideal arc-extinguishing effect that meets actual needs, fundamentally solving the problem of arc initiation in the switch.

[0090] Here, it is necessary to provide appropriate explanations and clarifications for several important terms involved in the arc-free switch and its arc-extinguishing method described in the embodiments:

[0091] Explanation of the meaning of the resistance value Rh in the arc-starting internal resistance range of the switch: During the closing and opening of the switch contacts, and during the transition of the switch's internal resistance, when the switch's internal resistance equals the resistance value Rh in the arc-starting internal resistance range, the leakage current Ic passing through the insulating gas between the switch contacts will undergo a step change, thus producing a step arc-starting phenomenon. Clearly, both the resistance value Rh in the arc-starting internal resistance range and the leakage current Ic are variables, and there exists a variable range. This also determines that there must be an arc-starting internal resistance range during the switch's opening and closing processes. During the closing process of the switch contacts, as the switch contacts gradually approach each other, the switch's internal resistance gradually decreases. When the switch's internal resistance equals Rh... When the switch contacts reach the upper limit of the arc-starting internal resistance range Rhd, they enter the arc-starting upper limit critical point and are in an arc-starting state until the switch contacts are completely closed and the internal resistance value equals 0. During the switch contact opening process, when the switch contacts disengage and the internal resistance value equals the lower limit of the arc-starting internal resistance range Rhx, the switch contacts enter the lower limit critical point and are in an arc-starting state. Subsequently, as the switch contacts gradually separate, the internal resistance value gradually increases until the internal resistance value exceeds the upper limit of the arc-starting internal resistance range Rhd. Obviously, the arc-starting internal resistance value Rh includes the upper limit value Rhd and the lower limit value Rhx.

[0092] Explanation of the meaning of the upper limit value Rhd of the arc-starting internal resistance range of the switch: The upper limit value Rhd of the arc-starting internal resistance range of the switch is the upper critical point of the arc-starting internal resistance range of the switch; when the internal resistance value of the switch is equal to or less than the upper limit value Rhd of the arc-starting internal resistance range, the switch contact will enter the arc-starting internal resistance range.

[0093] Explanation of the lower limit value Rhx of the switch arc-starting internal resistance range: The lower limit value Rhx of the switch arc-starting internal resistance range is the lower critical point of the switch arc-starting internal resistance range. When the internal resistance of the switch is equal to or greater than the lower limit value Rhx of the switch arc-starting internal resistance range, the switch contact will enter the arc-starting internal resistance range; the lower limit value Rhx of the switch arc-starting internal resistance range approaches 0 infinitely.

[0094] Explanation of the meaning of leakage current Ic: During the closing and opening of switch contacts, the current passing through the insulating gas between the contacts is called leakage current Ic.

Claims

1. An arc-free switch, characterized in that, include: The first electrode (P1), the second electrode (P2), the arc suppression resistor structure (R), and the main switch (CJK); The arc-suppressing resistor structure (R) is connected in parallel with the main switch (CJK) between the first electrode (P1) and the second electrode (P2).

2. The arc-free switch as described in claim 1, characterized in that, The arc-free switch includes: an active contact (1), an auxiliary contact (2), a main fixed contact (3), a graded arc-suppressing resistor (R1), and a rivet (4). The active contact (1) and the auxiliary active contact (2) are integrally connected at the center to form an active contact; the main fixed contact (3) and the graded arc-extinguishing resistor (R1) are integrally connected to form a fixed contact; one active contact and two mutually insulated fixed contacts are respectively arranged in different corresponding positions to form the arc-free switch; wherein the active contact and the fixed contact respectively form the auxiliary switch, the arc-extinguishing resistor structure (R) and the main switch (CJK) of the arc-free switch, and the two mutually insulated fixed contacts respectively form the first electrode (P1) and the second electrode (P2) of the arc-free switch. The cross-sectional shape of the auxiliary contact piece (2) includes at least one or more of the following: rectangular, arc-shaped, wavy, or sawtooth shape; The target positions at both ends of the auxiliary contact piece (2) are either not provided with silver contacts or are provided with silver contacts.

3. The arc-free switch as described in claim 1, characterized in that, The arc-free switch is configured as a double-contact switch or a single-contact switch.

4. The arc-free switch as described in claim 1, characterized in that, When the arc-free switch is a switch for an arc-free relay, the arc-free relay includes: Arc-free switch, first control terminal (a) of relay, second control terminal (b) of relay, relay control system (CJ), relay drive system and relay housing (5); The arc-free switch is positioned at the corresponding location of the arc-free relay.

5. The arc-free switch as described in claim 1, characterized in that, The arc-free switch is configured as a standard arc-free switch or as an arc-free relay.

6. The arc-free switch as described in claim 1, characterized in that, When the arc-free switch is the switch of the arc-free relay, it can include: Arc-free switch, first control terminal (a) of relay, second control terminal (b) of relay, relay control system (CJ), relay drive system and relay housing (5); The arc-free switch includes a graded arc-suppression resistor (R1), an active contact (1), an auxiliary contact (2), a main fixed contact (3), and a rivet (4); its configuration includes: An active contact (1) and an auxiliary active contact (2) are integrally connected at the center to form an active contact; a main fixed contact (3) and a graded arc-extinguishing resistor (R1) are integrally connected to form a fixed contact; one active contact and two mutually insulated fixed contacts are respectively set in different corresponding positions to form the arc-free switch; wherein the active contact and the fixed contact respectively form the auxiliary switch, the arc-extinguishing resistor structure and the main switch of the arc-free switch, and the two mutually insulated fixed contacts respectively form the first electrode and the second electrode of the arc-free switch; The cross-sectional shape of the auxiliary contact piece includes at least one or more of the following: rectangular, arc-shaped, wavy, or sawtooth. The target positions at both ends of the auxiliary contact piece are either not provided with silver contacts or are provided with silver contacts; The relay control system (CJ) includes a first control terminal (a) of the relay, a second control terminal (b) of the relay, and a relay drive system; the relay drive system includes a positioning spring (6), a wiring screw (7), a moving magnet (8), a movable bracket (9), a coil (10), a fixed magnet (11), and a support spring (12). The movable contact is mounted on the movable bracket (9), wherein the movable bracket (9) is integrally connected with the movable magnet (8), and the two fixed contacts are respectively mounted on the housing terminal block corresponding to the movable contact.

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