A relay

Abstract

The utility model relates to a relay, it is equipped with the winding window for the coil winding and the contact space for the contact point subassembly accommodation, the relay still is equipped with preset area, and the preset area communicates with winding window and is separated with contact space, the preset area is still configured to be located in the upper portion of winding window under the relay installation state, or the coil terminal is located in the lower portion of winding window. The utility model can reduce the moisture hot air content around the contact point subassembly, and the contact point icing is inhibited before contact.

Description

Technical Field

[0001] This utility model relates to the field of relay technology, and specifically to a relay. Background Technology

[0002] The relay includes a fixed part and a moving part. The fixed part includes a stationary contact assembly with a stationary contact. The moving part includes an armature and a moving contact assembly fixed to the armature. The moving contact assembly has a moving contact corresponding to the stationary contact. When the coil is not energized, the moving part remains in the position where the moving contact is disconnected from the stationary contact. When the coil is energized, the armature is attracted by the iron core, which drives the moving contact assembly to move, causing the moving contact to close with the stationary contact.

[0003] Existing relays commonly suffer from contact failure due to condensation and ice formation on the contact surface at low temperatures (e.g., ambient temperature ≤ -10℃). There is an urgent need to achieve humidity control and phase change suppression through structural innovation. Utility Model Content

[0004] The purpose of this invention is to overcome the aforementioned defects or problems in the prior art and to provide a relay that can suppress contact icing before the contacts make contact.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] Technical solution one relates to a relay, which has a winding window for winding a coil and a contact space for accommodating a contact assembly. The relay also has a preset area, which is connected to the winding window and separated from the contact space. The preset area is also configured to be located above the winding window when the relay is installed or when the coil terminal is located below the winding window.

[0007] Technical Solution 2 based on Technical Solution 1: When the preset area is located above the winding window, it is provided with at least one downward-facing recess.

[0008] Technical Solution 3 based on Technical Solution 2: The relay includes a receiving element and a coil frame, the coil is wound on the coil frame and its axis extends along a first direction; the contact assembly is located at the first end of the coil frame along the first direction, and the receiving element receives the coil frame, the coil and the contact assembly; the receiving element cooperates with the first end of the coil frame to form the preset area.

[0009] Technical solution four based on technical solution three: The contact assembly includes at least one pair of corresponding moving contacts and stationary contacts; the moving contacts are adapted to swing relative to the stationary contacts in a plane perpendicular to the second direction and to close or open with the stationary contacts through a motion component along the first direction; the receiving member and the first end of the coil frame respectively cooperate to form two recesses on both sides along the second direction, and the two recesses form the preset area; the second direction is perpendicular to the first direction.

[0010] Technical solution five based on technical solution four: the recessed portion extends along a third direction to both ends of the receiving member along the third direction, and the third direction is perpendicular to the first direction and the second direction.

[0011] Technical Solution Six based on Technical Solution Four: Define the preset areas on both sides of the coil frame along the second direction as the first recess; the contact assembly is close to the first side of the coil frame along the third direction, and the receiving member also cooperates with the first end of the coil frame along the first side of the third direction to form the second recess; the two first recesses and the second recess cooperate to form the preset area.

[0012] Technical solution seven based on technical solution six: a first baffle is provided between the first recess and the contact space, and a second baffle is provided between the second recess and the contact space; a third baffle and a fourth baffle are also provided on the top of the first recess and the second recess, respectively.

[0013] Technical solution eight based on technical solution six: The second recessed portion extends along the second direction and its two ends are respectively connected to the two first recessed portions.

[0014] Technical solution nine based on technical solution six: the receiving member and the first end of the coil frame along the first direction are connected by overlapping or insertion to form the first recess and / or the second recess.

[0015] Technical Solution 10 based on Technical Solution 7: The receiving member has a first wall opposite to the first end of the coil frame along a first direction, two first side walls respectively located on both sides of the first wall along a second direction, and a second side wall located on the first side of the first wall along a third direction. The first wall of the receiving member has two first connecting walls arranged at intervals along the second direction and opposite to each other, and a second connecting wall near the second side wall. The two ends of the second connecting wall are respectively connected to the two first connecting walls. The first connecting wall is adapted to overlap or insert with the first end of the coil frame so that the first connecting wall cooperates with the first side wall and the first wall to form the first recess. The second connecting wall is adapted to overlap or insert with the first end of the coil frame so that the second connecting wall cooperates with the second side wall and the first wall to form the second recess. The first connecting wall forms at least a part of the first baffle wall, the second connecting wall forms at least a part of the second baffle wall, the first wall corresponding to the part between the first connecting wall and the first side wall forms the third baffle wall, and the first wall corresponding to the part between the second connecting wall and the second side wall forms the fourth baffle wall.

[0016] Technical solution eleven, based on any one of technical solutions one through ten: the preset area is connected to the outside.

[0017] Technical solution 12 based on technical solution 11: The receiving component has a through hole near the contact space in the corresponding preset area, and the relay also includes a magnet, which is placed in the through hole.

[0018] Technical solution thirteen, based on any one of technical solutions five to ten, further includes a static contact component, which is fixedly connected to a static contact point. The static contact component is located on a first side of the coil frame along a third direction and cooperates with the coil frame and / or the receiving element to form a blocking structure. On a projection plane perpendicular to the third direction, the static contact component at least partially overlaps with the coil.

[0019] Technical solution fourteen, based on technical solution thirteen, further includes an iron core, a yoke, an armature, and a moving spring; the iron core penetrates the coil frame along a first direction; the yoke has a first arm extending along the first direction and a second arm extending along a third direction; the moving spring has a connecting portion and a contact portion; the first arm is fixedly connected to the connecting portion and is located on the second side of the coil frame along the third direction; the second arm is fixedly connected to the iron core at the second end of the coil frame along the first direction; the armature is fixedly connected to the contact portion and is located at the first end of the coil frame along the first direction; the armature is adapted to drive the contact portion to swing so that the moving contact closes or opens with the stationary contact through the motion component in the first direction; the coil frame includes a first retaining wall, a second retaining wall, and a winding shaft located between the first retaining wall and the second retaining wall; the winding shaft extends along the first direction, and the space between the winding shaft and the first and second retaining walls forms the winding window.

[0020] As can be seen from the above description of this utility model, compared with the prior art, this utility model has the following beneficial effects:

[0021] Through continuous observation, experimentation, and research, the applicant has determined that the technical problem in existing solutions—namely, the common occurrence of contact failure due to condensation and ice formation on the contact surface in low-temperature environments (e.g., ambient temperature ≤ -10℃)—lies in the following: Under low-temperature conditions, the enameled wire of the coil, wound on a coil frame, inevitably absorbs trace amounts of moisture in the gaps between the wires. During the low-temperature startup phase (e.g., ambient temperature ≤ -10℃), the heat generated after the coil is energized causes the air in the adjacent cavity to heat up rapidly, creating a significant temperature gradient with the contact chamber at ambient temperature. The thermal effect generated during coil energization leads to a significant increase in the air temperature in the adjacent area. This temperature rise causes the gas inside the coil cavity to expand due to heat, creating a dynamic pressure gradient between the gas and the low-temperature, non-conductive contact chamber. Driven by this pressure, the air medium containing gaseous moisture undergoes directional convection along the internal channels of the relay, causing the hot, humid airflow to condense at the lower-temperature contact surface. As the relay continues to operate, this cycle of humid and hot airflow migration and condensation will cause the liquid water film on the contact surface to thicken continuously. When the ambient temperature is below -10℃, the liquid water in the contact gap will undergo a solidification phase change, forming an ice crystal layer with insulating properties. This will prevent the contacts from making contact and conducting due to the ice layer, ultimately causing the relay to fail.

[0022] In technical solution one, the winding window refers to the space enclosed by the winding shaft of the coil frame and the retaining walls at both ends of the winding shaft; the preset area is connected to the winding window, meaning that the airflow inside the winding window can flow to the preset area, and the preset area is formed outside the winding window; the preset area is separated from the contact space, meaning that the preset area and the contact space are physically or spatially separated; the preset area is located above the winding window, meaning that the projection of the preset area on the projection plane parallel to the vertical direction is above the projection of the winding window and the two are offset from each other; in the relay installation state, the preset area is located above the winding window, meaning that the preset area relay is located above the winding window in actual use; when the coil terminal is located below the winding window, the preset area is located above the winding window, meaning that when the preset area is presented as a product alone, the preset area is located above the winding window.

[0023] In low-temperature environments (e.g., ambient temperature ≤ -10℃), during coil channel operation, the Joule heating effect causes the coil temperature to rise, resulting in the expansion and upward flow of convective gas containing saturated humid and hot air. This convective gas has an upward flow characteristic. The preset area is also configured to be located above the winding window when the relay is in the safe state or when the coil terminals are below the winding window. Since the preset area is connected to the winding window and separated from the contact space, the layout above the preset area makes it easier for the humid and hot air to flow to the preset area. The preset area becomes a directional release area for the humid and hot air, thereby reducing the amount of humid and hot air entering the contact space. Compared with the prior art, this reduces the humid and hot air content in the contact space, making the contact space a low-humidity protection zone. Therefore, this technical solution is beneficial for suppressing contact icing before contact, and is especially suitable for relay applications in low-temperature environments (e.g., ambient temperature ≤ -10℃).

[0024] In technical solution two, the recessed portion opens downwards. The recessed portion can be, but is not limited to, any geometric shape that can form a specific avoidance structure, such as regular or irregular grooves, cavities, notches, or sunken steps. When the coil expands due to heat, the humid gas naturally flows upwards into the recessed portion due to its decreased density. Part of the airflow condenses directly on the top and / or side walls of the recessed portion after contacting them. The condensate moves downwards and is guided downwards by the recessed portion, thus preventing condensate from dripping directly onto the contact assembly surface. Another part of the airflow is blocked by the top wall or irregularly shaped side walls and sinks back to the winding window. After being heated, it flows upwards again, thus circulating between the winding window and the recessed portion. During this circulation, the airflow slows down and gradually condenses, and the humid gas flow gradually decreases, further reducing the humid gas content in the contact space. When there are multiple recessed portions, both the condensation area and the blocking area increase relatively, thereby improving the overall dehumidification capacity.

[0025] In technical solution three, the receiving component and the first end of the coil frame cooperate to form a preset area. Since the surface of the receiving component has a low temperature, the surface of the receiving component (temperature lower than that of the humid airflow) can be used to cause the humid airflow to condense and precipitate in the preset area to reduce the moisture content in the contact space. Furthermore, since the contact assembly is located at the first end of the coil frame along the first direction, and the preset area is formed by the cooperation between the receiving member and the first end of the coil frame, the preset area is close to the contact space. Since the preset area is separated from the contact space, the preset area can act as a physical barrier to the contact space. When the humid and hot air flows into the preset area, it enters the preset area from bottom to top. During the flow process, it can fully contact the inner wall of the receiving member, thereby accelerating the condensation of the humid and hot airflow on the inner wall of the receiving member and reducing the residual moisture content in the airflow. Since the body temperature of the preset area is lower than the airflow temperature, the humid and hot airflow condenses on the inner wall of the preset area. The condensate moves downward and is guided downward by the inner wall of the preset area, thereby preventing the condensate from dripping directly onto the surface of the contact assembly. This allows the airflow to be constrained to flow on the surface of the receiving member and the inner wall of the preset area and gradually condense, reducing the humid and hot airflow content in the contact space and lowering the humidity in the contact space.

[0026] In technical solution four, recesses are provided on both sides of the contact component. The two recesses form a preset area to balance the airflow distribution, avoid moisture accumulation on one side, and allow condensation on both sides to proceed simultaneously, thereby improving the overall dehumidification uniformity.

[0027] In technical solution five, the third direction is typically the length of the relay. The recess extends along this third direction to both ends of the receiving element along the same third direction, forming a continuous area spanning the entire length of the relay. This significantly increases the airflow path length, and the airflow velocity naturally decreases due to the extended path, prolonging the residence time of the hot and humid air within the recess. The lower airflow velocity increases the contact time between the hot and humid airflow and the inner wall of the receiving element, promoting multiple condensations. The area near the coil has a higher heating temperature and stronger evaporation capacity, resulting in lower condensation efficiency. The area farther from the coil has a lower ambient temperature, becoming the main condensation zone. Therefore, hot and humid air enters the recess through the winding window. In the high-temperature area, some of the hot and humid airflow remains gaseous. As the airflow flows towards the end of the coil, the temperature gradually decreases, and the hot and humid airflow condenses and precipitates sequentially in the low-temperature section (such as from the middle to the end of the recess). This achieves segmented condensation of moisture, ensuring that the airflow approaches the ambient humidity level at the end, reducing the risk of icing in the contact space.

[0028] In technical solution six, the second recess is located on the first side of the coil frame along the third direction. On the one hand, it can divert high humidity airflow near the contact component area to prevent humid airflow from flowing to the contact component area. On the other hand, it can improve the overall dehumidification capacity and reduce the humidity load of the first recess.

[0029] In technical solution seven, the first baffle wall forms a separation boundary between the first recess and the contact space, preventing airflow from flowing into the contact space from the first recess; the second baffle wall forms a separation boundary between the second recess and the contact space, preventing airflow from flowing into the contact space from the second recess; the third and fourth baffle walls force the humid and hot airflow to sink or condense, causing the airflow or condensate to move downwards away from the contact space, further ensuring the dryness of the contact space; in addition, the arrangement of the first and third baffle walls, and the arrangement of the second and fourth baffle walls, compared to the first and third baffle walls being located on the same plane (e.g., extending obliquely), allows the first and second recesses to have larger spaces, increasing the residence time of humid and hot air in the first and second recesses, increasing the contact frequency with the inner wall of the accommodating member, and enhancing the condensation efficiency.

[0030] In technical solution eight, the second recess extends along the second direction and its two ends are respectively connected to the two first recesses, which further increases the space of the second recess and further ensures the dryness of the contact space.

[0031] In technical solution nine, overlapping or plugging makes it easier to form a tight fit structure, ensuring that the airflow flows directionally to the preset area and is less likely to flow into the contact space.

[0032] In technical solution ten, the structural design of the accommodating component creates a U-shaped channel within it. As airflow passes through, it is constrained by the wall, generating vortex flow. This vortex increases the residence time of hot, humid air within the cavity, enhancing the contact frequency with the inner wall of the accommodating component and improving condensation efficiency. Furthermore, the first connecting wall forming at least a portion of the first baffle wall and the second connecting wall forming at least a portion of the second baffle wall further improve the strength of the accommodating component. The overlapping or insertion of the accommodating component and the coil frame facilitates a tight fit, ensuring directional airflow to the predetermined area and preventing it from flowing into the contact space.

[0033] In technical solution eleven, the preset area is connected to the outside, and the moisture is driven to be discharged through the pressure difference between the inside and outside, thereby realizing the dynamic update of the airflow in the preset area and reducing the humidity in the preset area.

[0034] In technical solution 12, the setting of the magnet is conducive to arc extinguishing and extends the life of the contact assembly. In addition, the magnet, as a cooling component, directly cools the airflow, thereby promoting the condensation of hot and humid airflow on the magnet.

[0035] In technical solution thirteen, the stationary contact assembly, as a metal component, forms a physical barrier between the contact assembly and the coil through structural cooperation with the coil frame and / or housing, forcing hot and humid air to bypass to a preset area path, thereby promoting airflow condensation. Because the metal surface of the stationary contact assembly has a lower thermal conductivity temperature, the airflow flowing around it is cooled, and the hot and humid airflow condenses and precipitates on the surface of the stationary contact assembly before reaching the contact, further reducing the moisture content of the contact space.

[0036] In technical solution fourteen, the first arm and the connecting part act as a metal barrier, located on the second side of the coil frame along a third direction. This barrier prevents the straight-line flow of hot and humid air from the coil area to the contact space, forcing the airflow to detour to a predetermined path outside the yoke, thus preventing moisture from directly intruding into the contact assembly. The high thermal conductivity of the first arm and the connecting part promotes the condensation and precipitation of hot and humid airflow on the metal surface, reducing the humidity of the airflow. Attached Figure Description

[0037] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the relay according to Embodiment 1 of this application;

[0039] Figure 2 This is a schematic diagram of the receiving element according to Embodiment 1 of this application;

[0040] Figure 3 for Figure 2 A bottom view;

[0041] Figure 4 This is a top view of the relay according to Embodiment 1 of this application;

[0042] Figure 5 for Figure 4 Sectional view along the AA direction;

[0043] Figure 6 for Figure 4 Sectional view in the BB direction;

[0044] Figure 7 for Figure 4 Sectional view in the CC direction;

[0045] Figure 8 This is a front view of the relay in Embodiment 1 of this application;

[0046] Figure 9 for Figure 8Sectional view in the DD direction;

[0047] Figure 10 This is a bottom view of the receiving element of the relay according to Embodiment 2 of this application;

[0048] Figure 11 A cross-sectional view of the relay of Embodiment 2 of this application. Figure 1 ;

[0049] Figure 12 A cross-sectional view of the relay of Embodiment 2 of this application. Figure 2 ;

[0050] Figure 13 This is a cross-sectional view of the relay according to Embodiment 3 of this application;

[0051] Figure 14 This is a cross-sectional view of the relay of Embodiment 4 of this application.

[0052] Explanation of key figure labels:

[0053] 10. Receiving component; 11. First wall; 12. First side wall; 121. Through hole; 13. First connecting wall; 14. Groove; 15. Second connecting wall; 16. Second side wall; 20. Magnetic circuit portion; 21. Coil frame; 211. First barrier wall; 212. Second barrier wall; 213. Winding shaft; 214. Receiving cavity; 215. First connecting block; 216. Winding window; 01. Preset area; 02. First recess; 03. Second recess; 22. Coil; 23. Iron core; 24. Yoke; 25. First arm; 251. Second arm; 252. Armature; 26. Moving spring; 30. Connecting part; 31. Moving lead-out terminal; 311. Contact part; 32. Bending part; 33. Stationary contact assembly; 40. Stationary spring; 41. Stationary lead-out terminal; 42. Contact assembly; 50. Moving contact; 51. Stationary contact; 52. Magnet; 60. Detailed Implementation

[0054] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are preferred embodiments of the present utility model and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0055] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and drawings of this utility model is for distinguishing different objects and not for describing a specific order.

[0056] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this utility model, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing this utility model and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific protection scope of this utility model.

[0057] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this utility model shall be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or components.

[0058] In the claims, description and accompanying drawings of this utility model, the terms "comprising", "having", and variations thereof are used to mean "including but not limited to".

[0059] In the claims and the description other than the embodiments, the terms "first direction," "second direction," and "third direction" only refer to a feature having one of the aforementioned directions being perpendicular to a feature having another direction, and do not require that they be implemented according to the "first direction," "second direction," and "third direction" described in the embodiments. In this embodiment, the first direction is perpendicular to both the second direction and the third direction, and the first direction, the second direction, and the third direction are orthogonal. Exemplarily, the first direction can be divided into up and down, the second direction can be divided into left and right, and the third direction can be divided into front and back.

[0060] Example 1

[0061] See Figure 1-5 , Figure 1-5 A relay is shown, including a housing 10, a magnetic circuit portion 20, and a contact portion.

[0062] See Figure 1 The accommodating member 10 has a box-like structure. The accommodating member 10 has an opening at its second end along a first direction. The accommodating member 10 houses the coil frame 21, coil 22, and contact assembly 50 (described below). In this embodiment, the accommodating member 10 is fixedly connected to the second retaining wall 212 of the coil frame 21 (described below) to form a cavity. See also... Figure 2-3The receiving member 10 is provided with a first wall 11 opposite to its opening. The receiving member 10 is also provided with two first side walls 12 located on both sides of the first wall 11 along the second direction. The first side walls 12 are perpendicular to the second direction. The receiving member 10 is also provided with a first side wall 12 located on both sides of the first wall 11 along the third direction. Figure 3 The second sidewall 16 (right side) of the receiving member 10 has two protruding first connecting walls 13 that are spaced apart along the second direction and opposite to each other. The first connecting walls 13 cooperate with the adjacent first sidewall 12 and first wall 11 to form a downward-opening groove 14. In this embodiment, the first connecting walls 13 are stepped along the third direction.

[0063] See Figure 1 and Figure 5 The magnetic circuit portion 20 includes a coil frame 21, a coil 22, a coil terminal 23, an iron core 24, a yoke 25, and an armature 26. The coil frame 21 includes a first barrier 211, a second barrier 212, and a winding shaft 213 located between the first barrier 211 and the second barrier 212. The winding shaft 213 extends along a first direction, and the space between the winding shaft 213 and the first barrier 211 and the second barrier 212 forms a winding window 216. The first barrier 211 is located at a first end of the coil frame 21 along the first direction and is close to the first wall 11 of the receiving member 10. See [reference needed]. Figure 1 The first retaining wall 211 protrudes along a third direction on a first side and has a receiving cavity 214 for accommodating the contact assembly 50 (hereinafter referred to as the receiving cavity 214). The receiving cavity 214 constitutes a contact space for accommodating the contact assembly 50. However, it should be understood that the contact space may also be simply a space for accommodating and moving the contact assembly 50, without the need for surrounding obstruction structures. The contact space may also be formed by the cooperation of the coil frame 21 and the receiving member 10. Stepped first connecting blocks 215 are formed on both sides of the first retaining wall 211 along a second direction. The first connecting blocks 215 form steps along a third direction. The two first connecting blocks 215 are respectively adapted to overlap with the two first connecting walls 13 to form two continuous walls extending along a third direction. The continuous walls cooperate with the first side wall 12 and the first wall 11 to form a recessed portion with an opening facing the second end of the coil frame 21 along the first direction. This recessed portion opens downward and is defined as the first recessed portion 02 in this embodiment. The recessed portion can include, but is not limited to, any geometric shape that can form a specific avoidance structure, such as regular or irregular grooves, recesses, cavities, notches, sunken steps, etc. The continuous wall separates the contact assembly 50 and the first recessed portion 02 along the second direction.

[0064] See also Figure 1 and Figure 5The coil 22 is wound on the winding shaft 213 of the coil frame 21 with its axis extending along the first direction. The coil terminal 23 is electrically connected to the coil 22 and extends out of the lower end of the coil frame 21. The iron core 24 penetrates the coil frame 21 along the first direction. The yoke 25 is L-shaped and has a first arm 251 extending along the first direction and a second arm 252 extending along the third direction. The first arm 251 is located on the second side of the coil frame 21 along the third direction. Figure 5 The right side of the middle section is fixedly connected to the connecting part 31 of the moving spring 30 mentioned below, and the second arm 252 is at the second end of the coil frame 21 along the first direction ( Figure 5 The lower end) is fixedly connected to the iron core 24. The armature 26 is located at the first end of the coil frame 21 along the first direction ( Figure 5 (Upper middle end), the right end of the armature 26 abuts against the upper end of the first arm 251. The armature 26 moves closer to or further away from the upper end of the core 24 by swinging in a plane perpendicular to the second direction.

[0065] See Figure 1 and Figure 5 The contact components include a moving spring 30, a stationary contact assembly 40, and a contact assembly 50. See [link / reference] Figure 5 The moving spring 30 has a connecting part 31, a contact part 32, and a bending part 33 that are integrated with each other. The connecting part 31 extends along a first direction, and the contact part 32 extends along a third direction. The connecting part 31 is located on the second side of the coil frame 21 along the third direction. Figure 5 The lower end of the connecting part 31 penetrates the second baffle 212 to form a moving lead-out terminal 311. The contact part 32 is located at the first end of the coil frame 21 along the first direction and is fixed to the armature 26 and attached to the upper surface of the armature 26. The contact part 32 is located on the first side of the third direction ( Figure 5 The left side of the contact portion 32 extends into the receiving cavity 214 and is fixedly connected to the moving contact 51 described below. The bent portion 33 connects the upper end of the connecting portion 31 and the right end of the contact portion 32 and bends upward. The armature 26 is adapted to drive the contact portion 32 to swing so that the moving contact 51 and the stationary contact 52 described below close or open in the first direction.

[0066] See Figure 1 and Figure 5The stationary contact assembly 40 is located on the first side of the coil frame 21 along a third direction. The stationary contact assembly 40 is fixed to the stationary contact point 52 and cooperates with the coil frame 21 and / or the receiving member 10 to form a blocking structure. In this embodiment, the stationary contact assembly 40 contacts both ends of the coil frame 21 along the first direction, and the projections of the stationary contact assembly 40 and the coil 22 on the projection plane perpendicular to the third direction at least partially overlap. However, it should be understood that in other embodiments, the stationary contact assembly 40 may also cooperate with both the coil frame 21 and the receiving member 10 to form a blocking structure. In this case, the second sidewall 16 of the receiving member 10 may protrude and have a protrusion that abuts against the stationary contact assembly 40. In this embodiment, see... Figure 1 The stationary contact assembly 40 includes two stationary springs 41 spaced apart along a second direction. The bottom end of each stationary spring 41 extends out of the second retaining wall 212 to form a stationary lead-out terminal 42, and the upper end of each stationary spring 41 extends into the receiving cavity 214 and is fixedly connected to the stationary contact point 52. The moving lead-out terminal 311 of the moving spring 30 and the stationary lead-out terminal 42 of the stationary spring 41 form the lead-out terminals of the contact portion. It should be understood that the stationary contact assembly 40 may also have only one stationary spring 41.

[0067] See also Figure 1 and Figure 5 The contact assembly 50 is located at the first end of the coil frame 21 along the first direction and close to the first side of the coil frame 21 along the third direction. The contact assembly 50 includes a moving contact 51 and a stationary contact 52 respectively. The contact assembly 50 is located in the receiving cavity 214. In this embodiment, the contact assembly 50 includes at least one pair of moving contacts 51 and stationary contacts 52 respectively. In this embodiment, the contact assembly 50 includes two pairs of moving contacts 51 and stationary contacts 52 arranged at intervals along the second direction. The moving contact 51 is adapted to swing relative to the stationary contact 52 in a plane perpendicular to the second direction and to close or open with the stationary contact 52 by a motion component along the first direction.

[0068] In this embodiment, the relay is provided with a winding window 216 for winding the coil 22 and a contact relay for accommodating the contact assembly 50. The relay also has a preset region 01, which communicates with the winding window 216 and is separated from the contact space. The preset region 01 is further configured to be located above the winding window 216 when the relay is installed or when the coil terminal 23 is below the winding window 216. The winding window 216 refers to the space enclosed by the winding shaft 213 of the coil 22 holder 21 and the retaining walls at both ends of the winding shaft 213. The preset region 01 communicates with the winding window 216, meaning that airflow within the winding window 216 can flow to the preset region 01, and the preset region 01 is formed outside the winding window 216. The preset region 01 is separated from the contact space, meaning that the preset region 01 and the contact space are physically or spatially separated. The preset region 01 is located above the winding window 216, meaning that the preset region 01 is parallel to the vertical direction. The projection on the projection surface of the direction is above the projection of the winding window 216 and the two are offset from each other; in the relay installation state, the preset area 01 is located above the winding window 216, which means that the preset area 01 relay is located above the winding window 216 when in actual use; when the coil 22 terminal is located below the winding window 216, the preset area 01 is located above the winding window 216, which means that when the preset area 01 is presented as a product alone, the preset area 01 is located above the winding window 216.

[0069] See Figure 6-9The receiving member 10 and the first end of the coil holder 21 cooperate to form a preset region 01. The projection of the preset region 01 on a first projection plane perpendicular to the first direction is outside the projection of the coil 22 on the first projection plane, and the projection of the preset region 01 on at least one second projection plane parallel to the first direction at least partially overlaps with the projection of the contact space on the second projection plane. In this embodiment, the receiving member 10 and the first end of the coil holder 21 cooperate to form two first recesses 02 on both sides along the second direction, and the two first recesses 02 form the preset region 01. The first recesses 02 extend along a third direction to both ends of the receiving member 10 along the third direction. In this embodiment, the first recess 02 is formed by the accommodating member 10 and the first end of the coil frame 21 along the first direction through an overlapping fit. Specifically, the first connecting wall 13 is adapted to overlap with the first end of the coil frame 21 so that the first connecting wall 13 cooperates with the first side wall 12 and the first wall 11 to form the first recess 01. However, it should be understood that in other embodiments, the first recess 01 may also be formed by the accommodating member 10 and the first end of the coil frame 21 along the first direction through an insertion fit. In this embodiment, a first baffle is provided between the first recess 02 and the contact space to separate the first recess 02 and the contact space. A third baffle is provided at the top of the first recess 02. The first connecting wall 13 forms at least a part of the first baffle. The first wall 11 forms the third baffle corresponding to the part between the first connecting wall 13 and the first side wall 12. As can be seen from the above description, the first baffle is a continuous wall extending along a third direction formed by the overlapping of the first connecting block 215 and the first connecting wall 13.

[0070] In this embodiment, under low-temperature environment (e.g., ambient temperature ≤ -10℃), during the operation of the coil 22 channel, the Joule heating effect causes the temperature of the coil 22 to rise, resulting in the expansion and rise of the air around the coil 22. The resulting convective gas containing saturated humid and hot air has the characteristic of upward flow. The preset region 01 is also configured to be located above the winding window 216 when the relay is in the safe state or when the coil 22 terminal is located below the winding window 216. Since the preset region 01 is connected to the winding window 216 and separated from the contact space, the layout above the preset region 01 makes it easier for the humid and hot air to flow to the preset region 01. The preset region 01 becomes a directional release area for the humid and hot air, thereby reducing the amount of humid and hot air entering the contact space. Compared with the prior art, this reduces the content of humid and hot air in the contact space, making the contact space a low-humidity protection zone. Therefore, this technical solution is beneficial for suppressing contact icing before contact, and is especially suitable for relay applications in low-temperature environments (e.g., ambient temperature ≤ -10℃).

[0071] In this embodiment, the recessed portion opens downwards. The hot, humid gas from the coil 22, due to its decreased density, naturally flows upwards into the recessed portion. Part of the airflow condenses directly on the top and / or side walls of the recessed portion after contacting them. The condensate moves downwards and is guided downwards by the recessed portion, thus preventing condensate from dripping directly onto the contact assembly 50 surface. Another portion of the airflow is blocked by the top wall or irregularly shaped side walls and sinks back to the winding window 216. After being heated, it flows upwards again, thus circulating between the winding window 216 and the recessed portion. During this circulation, the airflow slows down and gradually condenses, and the hot, humid airflow gradually decreases, further reducing the content of hot, humid airflow in the contact space. When there are multiple recesses, both the condensation area and the blocking area increase relatively, thereby improving the overall dehumidification capacity.

[0072] In this embodiment, the accommodating member 10 and the first end of the coil 22 frame 21 cooperate to form a preset area 01. Since the surface of the accommodating member 10 has a low temperature, the surface of the accommodating member 10 (temperature lower than that of the hot and humid airflow) can be used to cause the hot and humid airflow to condense and precipitate in the preset area 01 to reduce the moisture content in the contact space. Furthermore, since the contact assembly 50 is located at the first end of the coil 22 frame 21 along the first direction, and the preset area 01 is formed by the cooperation between the accommodating member 10 and the first end of the coil 22 frame 21, the preset area 01 is close to the contact space. Since the preset area 01 is separated from the contact space, the preset area 01 can serve as a physical barrier to the contact space. When the humid and hot air flows into the preset area 01, it enters the preset area 01 from bottom to top. During the flow process, it can fully contact the inner wall of the accommodating member 10, thereby accelerating the condensation of the humid and hot airflow on the inner wall of the accommodating member 10 and reducing the residual moisture content in the airflow. Since the body temperature of the preset area 01 is lower than the airflow temperature, the humid and hot airflow condenses on the inner wall of the preset area 01. The condensate moves downward and is guided downward by the inner wall of the preset area 01, thereby preventing the condensate from dripping directly onto the surface of the contact assembly 50. This allows the airflow to be constrained to flow on the surface of the accommodating member 10 and the inner wall of the preset area 01 and gradually condense, reducing the humid and hot airflow content in the contact space and lowering the humidity in the contact space.

[0073] In this embodiment, recesses are provided on both sides of the contact assembly 50 to balance the airflow distribution, avoid moisture accumulation on one side, and allow condensation on both sides to proceed simultaneously, thereby improving the overall dehumidification uniformity.

[0074] In this embodiment, the third direction is typically the length of the relay. The recess extends along the third direction to both ends of the receiving member 10 along the third direction, forming a continuous area that runs through the entire length of the relay. This significantly increases the airflow path length, and the airflow speed naturally decreases due to the extended path, prolonging the residence time of the humid and hot air in the recess. The low-speed airflow increases the contact time between the humid and hot airflow and the inner wall of the receiving member 10, promoting multiple condensations. Among them, the area near the coil 22 has a higher heating temperature and stronger evaporation capacity, resulting in lower condensation efficiency. The area away from the coil 22 becomes the main condensation area due to the lower ambient heat dissipation temperature. Therefore, the humid and hot air enters the recess from the winding window. In the high-temperature area, the humid and hot airflow remains in a gaseous state. As the airflow flows towards the end far from the coil 22, the temperature gradually decreases. The humid and hot airflow condenses and precipitates sequentially in the low-temperature section (such as from the middle to the end of the recess), thereby achieving segmented condensation of moisture and ensuring that the airflow is close to the ambient humidity level at the end, reducing the risk of icing in the contact space.

[0075] In this embodiment, the first baffle wall forms a separation boundary between the first recess and the contact space, preventing airflow from flowing into the contact space from the first recess; the third baffle wall forces the humid and hot airflow to sink or condense, causing the airflow or condensate to move downward away from the contact space, further ensuring the dryness of the contact space; in addition, the arrangement of the first and third baffle walls, compared to the first and third baffle walls being located on the same plane (such as extending obliquely), allows the first recess 02 to have a larger space, increasing the residence time of the humid and hot air in the first recess 02, increasing the contact frequency with the inner wall of the accommodating member 10, and enhancing the condensation efficiency.

[0076] In this embodiment, overlapping or plugging makes it easier to form a tight fit structure, ensuring that the airflow flows in a directional manner to the preset area 01 and is not easy to flow into the contact space.

[0077] In this embodiment, the stationary contact assembly 40, as a metal component, forms a physical barrier between the contact assembly 50 and the coil 22 through its structural cooperation with the coil frame 21 and / or the housing 10, forcing the hot and humid air to bypass the coil and travel along a predetermined path to the predetermined area 01. This promotes airflow condensation. Because the metal surface of the stationary contact assembly 40 has a low thermal conductivity temperature, the airflow flowing around it is cooled before reaching the contact point, and the hot and humid airflow condenses and precipitates on the surface of the stationary contact assembly 40, further reducing the moisture content of the contact space.

[0078] In this embodiment, the first arm 251 and the connecting portion 31 act as a metal barrier, located on the second side of the coil frame 21 along a third direction. This barrier blocks the straight flow of hot and humid air from the coil 22 area to the contact space, forcing the airflow to detour to the predetermined area 01 outside the yoke 25, thus preventing moisture from directly intruding into the contact assembly 50. The first arm 251 and the connecting portion 31 have high thermal conductivity, which promotes the condensation and precipitation of hot and humid airflow on the metal surface, reducing the humidity of the airflow.

[0079] Example 2

[0080] Example 2 is basically the same in structure as Example 1, except that in this example, see... Figure 10-12 The preset areas 01 on both sides of the coil frame 21 along the second direction are defined as first recesses 02. The receiving member 10 also cooperates with the first end of the coil frame 21 along the third direction to form a second recess 03. The second recess 03 extends along the second direction and its two ends are respectively connected to the two first recesses 02. Similarly, the receiving member 10 and the first end of the coil frame 21 along the first direction are also connected by overlapping or insertion to form the second recess 03. In practical applications, the receiving member 10 and the first end of the coil frame 21 along the first direction are also connected by overlapping or insertion to form the first recess 02 and / or the second recess 03. The two first recesses 02 and the second recess 03 cooperate to form the preset area 01. A second baffle is provided between the second recess 03 and the contact space to separate the second recess 03 and the contact space; a fourth baffle is provided at the top of the second recess 03. The second connecting wall 15 forms at least a portion of the second baffle wall, and the first wall 11 forms a fourth baffle wall corresponding to the portion between the second connecting wall 15 and the second side wall 16. The second baffle wall constructs a separating boundary between the second recess 03 and the contact space, preventing airflow from flowing into the contact space from the second recess 03; the fourth baffle wall forces the humid and hot airflow to sink or condense, causing the airflow or condensate to move downward away from the contact space, further ensuring the dryness of the contact space. The arrangement of the second and fourth baffle walls, compared to the second and fourth baffle walls being located on the same plane (extending at an angle), allows the second recess 03 to have a larger space, increasing the residence time of the humid and hot air in the second recess 03, increasing the contact frequency with the inner wall of the accommodating member 10, and enhancing the condensation efficiency.

[0081] In this embodiment, the receiving member 10 is further provided with a second connecting wall 15 near the second side wall 16. The second connecting wall 15 is perpendicular to the third direction 5. The two ends of the second connecting wall 15 are respectively connected to two first connecting walls 13. The second connecting wall 15 is adapted to overlap or insert with the first end of the coil frame 21 so that the second connecting wall 15 cooperates with the second side wall 16 and the first wall 11 to form a second recess 03. The second connecting wall 15 abuts against the first side of the receiving cavity 214 of the first baffle 211 along the third direction, and can also close the opening of the receiving cavity 214 along the first side of the third direction. In this embodiment, the second baffle is entirely formed by the second connecting wall 15, but it should be understood that the second baffle can also be partially formed by the coil frame 21.

[0082] In this embodiment, the second recess 03 is located on the first side of the coil frame 21 along the third direction. On the one hand, it can divert high humidity airflow near the contact assembly 50 area to prevent humid airflow from flowing to the contact assembly 50 area. On the other hand, it can improve the overall dehumidification capacity and reduce the humidity load of the first recess 02.

[0083] In this embodiment, the second recess 03 extends along the second direction and its two ends are respectively connected to the two first recesses 02, which further increases the space of the second recess 03 and further ensures the dryness of the contact space.

[0084] In this embodiment, the structure of the accommodating member 10 forms a U-shaped channel within it. When airflow passes through, it is restricted by the wall, generating vortex flow. This vortex increases the residence time of the humid and hot air within the cavity, enhancing the contact frequency with the inner wall of the accommodating member 10 and improving condensation efficiency. Furthermore, the first connecting wall forms a first baffle wall, and the second connecting wall forms a second baffle wall, which also improves the strength of the accommodating member 10.

[0085] Example 3

[0086] Example 3 has a structure that is basically the same as that of Example 1, except that, see [link to example]. Figure 13 The first sidewall 12 of the accommodating member 10 is provided with a through hole 121 near the contact space corresponding to the first recess 02, so that the first recess 02 communicates with the outside.

[0087] In this embodiment, the first recess 02 is connected to the outside, and the moisture is driven to be discharged through the pressure difference between the inside and outside, thereby realizing the dynamic update of the airflow in the first recess 02 and reducing the humidity in the first recess 02.

[0088] Example 4

[0089] Example 4 has a structure that is basically the same as Example 3, except that, see [link to example]. Figure 14 The relay also includes a magnet 60, which is placed in a through hole 121. The through hole 121 is located near the contact assembly 50 on the first side wall 12, and each side wall 12 is provided with a through hole 121, so that the contact assembly 50 is provided on both sides along the second direction.

[0090] In this embodiment, the magnet 60 is beneficial for extinguishing the arc and extending the life of the contact assembly 50. In addition, the magnet 60 serves as a cooling component, directly cooling the airflow, thereby promoting the condensation of hot and humid airflow on the magnet 60.

[0091] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this utility model, but does not constitute a limitation on the scope of protection of this utility model. Modifications, equivalent substitutions, or other improvements to the embodiments of this utility model or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this utility model or the foregoing embodiments, should all be included within the scope of protection of this utility model.

Claims

1. A relay having a winding window (216) for winding a coil (22) and a contact space for accommodating a contact assembly (50), characterized in that, The relay is further provided with a preset area (01), which is connected to the winding window (216) and separated from the contact space; the preset area (01) is also configured to be located above the winding window (216) when the relay is installed or when the coil terminal (23) is located below the winding window (216).

2. A relay as described in claim 1, characterized in that, When the preset area (01) is located above the winding window (216), it has at least one downward-facing recess.

3. A relay as described in claim 2, characterized in that, The relay includes a receiving element (10) and a coil frame (21), the coil (22) is wound on the coil frame (21) and its axis extends along a first direction; the contact assembly (50) is located at a first end of the coil frame (21) along the first direction, the receiving element (10) accommodates the coil frame (21), the coil (22) and the contact assembly (50); the receiving element (10) cooperates with the first end of the coil frame (21) to form the preset area (01).

4. A relay as described in claim 3, characterized in that, The contact assembly (50) includes at least one pair of corresponding moving contacts (51) and stationary contacts (52); the moving contact (51) is adapted to swing relative to the stationary contact (52) in a plane perpendicular to the second direction and to close or open with the stationary contact (52) by a motion component along the first direction; the receiving member (10) and the first end of the coil frame (21) respectively cooperate to form two recesses on both sides along the second direction, and the two recesses form the preset area (01); the second direction is perpendicular to the first direction.

5. A relay as described in claim 4, characterized in that, The recessed portion extends along a third direction to both ends of the receiving member (10) along the third direction, the third direction being perpendicular to the first direction and the second direction.

6. A relay as described in claim 4, characterized in that, a definition is provided. The recesses on both sides of the coil frame (21) along the second direction are the first recesses (02); the contact assembly (50) is close to the first side of the coil frame (21) along the third direction, and the receiving member (10) also cooperates with the first end of the coil frame (21) along the first side of the third direction to form a second recess (03). The two first recesses (02) and the second recesses (03) cooperate to form the preset area (01).

7. A relay as described in claim 6, characterized in that, A first baffle is provided on one side between the first recess (02) and the contact space, and a second baffle is provided between the second recess (03) and the contact space; a third baffle and a fourth baffle are also provided on the top of the first recess (02) and the second recess (03), respectively.

8. A relay as described in claim 6, characterized in that, The second recess (03) extends along the second direction and its two ends are respectively connected to the two first recesses (02).

9. A relay as described in claim 6, characterized in that, The receiving member (10) and the first end of the coil frame (21) along the first direction are connected by overlapping or plugging to form the first recess (02) and / or the second recess (03).

10. A relay as described in claim 7, characterized in that, The receiving member (10) is provided with a first wall (11) opposite to the first end of the coil frame (21) along a first direction, two first side walls (12) located on both sides of the first wall (11) along a second direction, and a second side wall (16) located on the first side of the first wall (11) along a third direction. The first wall (11) of the receiving member (10) is provided with two first connecting walls (13) arranged at intervals along the second direction and opposite to each other, and a second connecting wall (15) near the second side wall (16). The two ends of the second connecting wall (15) are respectively connected to the two first connecting walls (13). The first connecting wall (13) is adapted to overlap or insert with the first end of the coil frame (21) so that the first connecting wall (13) and the first side wall (16) are connected. The first wall (12) and the first wall (11) cooperate to form the first recess (02), and the second connecting wall (15) is adapted to overlap or insert with the first end of the coil frame (21) so that the second connecting wall (15) cooperates with the second side wall (16) and the first wall (11) to form the second recess (03); the first connecting wall (13) forms at least a portion of the first baffle, the second connecting wall (15) forms at least a portion of the second baffle, the first wall (11) forms the third baffle corresponding to the portion between the first connecting wall (13) and the first side wall (12), and the first wall (11) forms the fourth baffle corresponding to the portion between the second connecting wall (15) and the second side wall (16).

11. A relay as described in any one of claims 1-10, characterized in that, The preset area (01) is connected to the outside.

12. A relay as described in claim 11, characterized in that, The receiving member (10) has a through hole (121) near the contact space corresponding to the preset area (01), and the relay also includes a magnet (60), which is placed in the through hole (121).

13. A relay as described in any one of claims 5-10, characterized in that, It also includes a stationary contact assembly (40) fixed to a stationary contact (52), the stationary contact assembly (40) being located on a first side of the coil frame (21) along a third direction and cooperating with the coil frame (21) and / or the receiving member (10) to form a blocking structure; on a projection plane perpendicular to the third direction, the stationary contact assembly (40) at least partially overlaps with the coil (22).

14. A relay as described in claim 13, characterized in that, It also includes an iron core (24), a yoke (25), an armature (26), and a moving spring (30); the iron core (24) passes through the coil frame (21) along a first direction; the yoke (25) is provided with a first arm (251) extending along the first direction and a second arm (252) extending along a third direction; the moving spring (30) is provided with a connecting part (31) and a contact part (32); the first arm (251) is fixedly connected to the connecting part (31) and both are located on the second side of the coil frame (21) along the third direction; the second arm (252) is fixedly connected to the iron core (24) at the second end of the coil frame (21) along the first direction; the armature (26) is fixedly connected to the contact part (32) and both are located at the first end of the coil frame (21) along the first direction; the armature (26) is adapted to drive the contact part (32) to swing so that the moving contact (51) closes or opens with the stationary contact (52) through the motion component in the first direction; The coil frame (21) includes a first retaining wall (211), a second retaining wall (212), and a winding shaft (213) located between the first retaining wall (211) and the second retaining wall (212). The winding shaft (213) extends along a first direction, and the space between the winding shaft (213) and the first retaining wall (211) and the second retaining wall (212) forms the winding window (216).

Images