Combined large-current relay

Abstract

The invention relates to the technical field of relays, and discloses a combined type large-current relay which comprises a relay base, a hollow heat dissipation block is arranged below the relay base, a plurality of bases are arranged in the relay base, iron cores are installed on the bases, coils are arranged on the iron cores, and the coils are arranged on the bases. An armature sheet is rotatably connected above the base, a movable contact is fixed at one end of the armature sheet, a first spring is connected between the armature sheet and the base, and a plurality of normally closed contacts and normally open contacts are respectively arranged on the relay base; through cooperative use of air cooling and liquid cooling, heat can be timely discharged, and heat accumulation is avoided, so that the heat dissipation effect of the hollow heat dissipation block is improved, the heat dissipation time of the relay can be shortened, the heat dissipation effect is improved, and influence on the service life of the relay caused by deformation of metal parts in the relay due to metal fatigue is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of relays, in particular to a combined high-current relay. Background Art

[0002] A modular high-current relay is an electronic control device that has the ability to handle large currents and is usually designed as a modular type for easy installation and use. The modular high-current relay includes components such as a base, a base, an armature, an iron core coil, a moving contact, a normally closed contact, and a normally open contact. In practical applications, modular high-current relays are usually used in situations where large currents need to be handled, such as large mines, thermal power generation, and other fields. They have the characteristics of high precision, high stability, and high reliability, and can meet the use requirements in various complex environments. They can control multiple circuits at the same time and realize more complex control functions.

[0003] When combined high-current relays are grouped together, their operating power and frequency are relatively high. Under such conditions, the relays will generate more heat when powered on. If it cannot be dissipated in time, it may cause the relays to overheat, affecting their normal operation or even damage them. In the prior art, heat dissipation can be properly performed by installing heat sinks or fans to help reduce the temperature, but the heat dissipation speed is slow and the heat dissipation effect is poor. The metal parts inside the relays are prone to metal fatigue and deformation under high temperature conditions. The higher the temperature, the easier it is to deform, which greatly reduces the service life of the relays. Summary of the invention

[0004] The present invention provides a combined high-current relay, which has the beneficial effect of reducing the heat dissipation time of the relay, improving the heat dissipation effect, and avoiding the deformation of metal parts inside the relay due to metal fatigue, thereby affecting the service life of the relay, and solves the problem mentioned in the above background technology that in the prior art, heat dissipation can be properly performed by installing a heat sink or a fan to help reduce the temperature, but the heat dissipation speed is slow and the heat dissipation effect is poor. The metal parts inside the relay are prone to metal fatigue and deformation under high temperature conditions. The higher the temperature, the easier it is to deform, which greatly reduces the service life of the relay.

[0005] The present invention provides the following technical solution: a combined high-current relay, comprising a relay base, a hollow heat sink block is arranged below the relay base, a plurality of bases are arranged inside the relay base, iron cores are installed on the plurality of bases, a coil is arranged on the iron core, an armature piece is rotatably connected above the base, a moving contact is fixed at one end of the armature piece, a first spring is connected between the armature piece and the base, and a plurality of normally closed contacts and normally open contacts are respectively arranged on the relay base; On the upper and lower sides inside the hollow heat sink, a number of first heat dissipation fins and second heat dissipation fins are respectively arranged, and ventilation covers and exhaust covers are installed at both ends of the hollow heat sink. A first fan is installed on the ventilation cover, and a second fan is fixed on the exhaust cover. A U-shaped cavity is formed on the hollow heat sink, and a liquid cooling circulation component is fixed on the hollow heat sink. The liquid cooling circulation component is communicated with the U-shaped cavity.

[0006] As an alternative solution of the combined high-current relay of the present invention, wherein: a number of third heat dissipation fins are arranged on the outer side surfaces of both sides of the hollow heat sink, and two mounting seats are fixed below the hollow heat sink. A wiring seat is installed on the side surface of the relay base. A water inlet pipe and a water outlet pipe are respectively installed on the hollow heat sink. The water inlet pipe and the water outlet pipe are both communicated with the U-shaped cavity.

[0007] As an alternative solution of the combined high-current relay of the present invention, wherein: the liquid cooling circulation component includes a first water tank, the first water tank is fixed below the hollow heat sink, and a variable-frequency water pump is fixed at one end of the first water tank. The water outlet of the first water tank is communicated with the water inlet of the variable-frequency water pump. A first water pipe is connected between the water outlet of the variable-frequency water pump and the water inlet pipe. A second water tank is fixed on the ventilation cover. A second water pipe is connected between the water inlet of the second water tank and the water outlet pipe. A third water pipe is connected between the second water tank and the first water tank. A number of fifth heat dissipation fins are fixed on the surface of the first water tank.

[0008] As an alternative solution of the combined high-current relay of the present invention, wherein: a number of the first heat dissipation fins are all slidably connected in the U-shaped cavity, and a connecting bar is fixed between a number of the first heat dissipation fins. The connecting bar is located in the U-shaped cavity. Two of the first heat dissipation fins are elastically connected to the hollow heat sink through a second spring.

[0009] As an alternative solution of the combined high-current relay of the present invention, wherein: a first wedge-shaped抵触 block is fixed on one of the first heat dissipation fins. A first抵触杆 is arranged in the U-shaped cavity. The first抵触杆 is elastically connected to the hollow heat sink through a third spring.

[0010] As an alternative solution of the combined high-current relay of the present invention, wherein: a floating block is arranged in the second water tank. A抵触 floating rod is fixed on the floating block. The抵触 floating rod is slidably connected to the second water tank. The抵触 floating rod is located below the first抵触杆.

[0011] As an optional solution of the combined high-current relay described in the present invention, sliding brackets are fixed on both sides of the hollow heat dissipation block, and a plurality of brush cleaning strips are slidably connected to the sliding bracket, and a plurality of the brush cleaning strips are in contact with the surface of the third heat dissipation fin, a fourth spring is connected between one end of the brush cleaning strip and the sliding bracket, and a second wedge-shaped resistance block is fixed to the other end of the brush cleaning strip.

[0012] As an optional solution of the combined high-current relay described in the present invention, the first contact bracket and the second contact bracket are respectively slidably connected to the ventilation hood, a fifth spring is connected between the first contact bracket and the ventilation hood, and the first contact bracket contacts with part of the second wedge-shaped contact block, a sixth spring is connected between the second contact bracket and the ventilation hood, and the second contact bracket contacts with another part of the second wedge-shaped contact block, third contact wedge blocks are fixed on both sides of the contact float rod, and one end of the first contact bracket and the second contact bracket contacts with two of the third contact wedge blocks respectively.

[0013] As an optional solution of the combined high-current relay described in the present invention, two strip plates are fixed on the surface of the ventilation hood, and a number of equally spaced air guide plates are rotatably connected to the strip plates. The air guide plates are located on one side of the first fan, and a gear is fixed to one end of the air guide plates.

[0014] As an optional solution of the combined high-current relay described in the present invention, an L-shaped rack is meshed and connected to the gear, a guide rod is fixed on the ventilation hood, the L-shaped rack is elastically connected to the guide rod through a seventh spring, a resistance bar is fixed on the second resistance bracket, a fourth resistance wedge is fixed at one end of the L-shaped rack, and the resistance bar is in resistance with the fourth resistance wedge.

[0015] The present invention has the following beneficial effects:

[0016] 1. In this combined high-current relay, through the cooperation of the relay base, several bases, iron cores, coils, armature plates, moving contacts, first springs, normally closed contacts, and normally open contacts, the combined high-current relay formed can control multiple circuits simultaneously to achieve more complex control functions. The hollow heat sink can transfer the heat generated when the relay base is working, thereby reducing the temperature inside the relay base. Through the first heat dissipation fins, second heat dissipation fins, and two third heat dissipation fins on the hollow heat sink, the heat on the hollow heat sink can be dissipated, thus reducing the temperature. Through the cooperation of the first fan on the ventilation cover and the second fan on the exhaust hood, an effective air circulation system can be formed to ensure that the heat dissipated from the first heat dissipation fins and second heat dissipation fins of the hollow heat sink can be discharged in time, avoiding heat accumulation, and thus improving the heat dissipation effect of the hollow heat sink; Through the U-shaped cavity opened on the hollow heat sink, when the temperature inside the relay base is relatively high, the variable-frequency water pump in the liquid cooling circulation component can transport the coolant in the first water tank to the U-shaped cavity, enabling the heat to be quickly conducted to the coolant and rapidly reducing the internal temperature of the hollow heat sink. Through the cooperation of the first water pipe, inlet pipe, second water tank, second water pipe, outlet pipe, third water pipe, and fifth heat dissipation fins, the purpose of enabling the coolant to circulate and quickly carry away the heat from the hollow heat sink can be achieved. By using the combination of air cooling and liquid cooling, the heat dissipation time of the relay can be reduced, the heat dissipation effect can be improved, and the metal fatigue of the internal metal components of the relay can be avoided, preventing deformation and affecting the service life of the relay.

[0017] 2. In this combined high-current relay, when the first heat dissipation fin slides in the U-shaped cavity, it can contact the coolant inside the U-shaped cavity to transfer heat, thereby reducing the temperature of the coolant and prolonging the cooling time. The variable-frequency water pump has variable-frequency characteristics and can change the flow rate of the water in the pipeline. When the variable-frequency water pump is at a low frequency, a liquid level difference can be formed inside the second water tank, which can cause the floating block to drive the contact floating rod to move upward and contact the first contact rod. Through the cooperation of the first contact rod, first wedge-shaped contact block, connecting strip, and second spring, the first heat dissipation fin can slide on the hollow heat sink, reducing the contact area with the coolant in the U-shaped cavity. At this time, the contact area with the air circulation system can be increased, enabling the heat adsorbed on the first heat dissipation fin to be quickly dissipated and the temperature to be reduced. When the frequency of the variable-frequency water pump changes, the floating block can drive the contact floating rod to move up and down reciprocally, indirectly achieving the purpose of the first heat dissipation fin reciprocally moving on the hollow heat sink, continuously adsorbing heat and dissipating heat, and further improving the heat dissipation effect of the hollow heat sink.

[0018] 3. In the combined high-current relay, the third heat sink fins on both sides of the hollow heat sink block can be cleaned by setting a plurality of brush cleaning strips, thereby reducing the amount of dust attached and improving the heat dissipation effect of the third heat sink fins. The two third contact wedges fixed on the contact floating rod can contact the first contact bracket and the second contact bracket at the same time when moving vertically. When the first contact bracket and the second contact bracket are contacted and moved horizontally, they can contact the second wedge-shaped contact blocks on both sides of the hollow heat sink block, so that the plurality of brush cleaning strips can move back and forth on the third heat sink fins for automatic cleaning. The strip plate on the ventilation hood can be rotatably connected to a plurality of air guide plates, so as to facilitate the rotation of the plurality of air guide plates. When the fourth interference wedge block fixed on the L-shaped rack collides with the interference strip fixed on the second interference bracket, the L-shaped rack can move downward to drive the gear fixed at one end of the air guide plate to rotate, so that the plurality of air guide plates can rotate automatically, and the purpose of adjusting the wind direction of the air flowing inside the hollow heat dissipation block can be achieved, thereby reducing heat dissipation dead angles and improving the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is one of the three-dimensional structural schematic diagrams of the present invention.

[0020] Figure 2 This is the second schematic diagram of the three-dimensional structure of the present invention.

[0021] Figure 3 It is a structural cross-sectional view of the present invention.

[0022] Figure 4 It is a schematic diagram of the internal structure of the relay base of the present invention.

[0023] Figure 5 It is a schematic diagram of the structure of the hollow heat dissipation block of the present invention.

[0024] Figure 6 It is a schematic diagram of the structure of the ventilation hood of the present invention.

[0025] Figure 7 It is a cross-sectional view of the hollow heat dissipation block structure of the present invention.

[0026] Figure 8 for Figure 3 A partial enlarged view of point A in the middle.

[0027] Fig. 9 for Figure 5 A partial enlarged view of point B in the middle.

[0028] Fig.10 It is a schematic diagram of the first heat dissipation fin structure of the present invention.

[0029] In the figure: 1. Relay base; 101. Base; 102. Iron core; 103. Coil; 104. Armature piece; 105. Moving contact; 106. First spring; 107. Normally closed contact; 108. Normally open contact; 2. Hollow heat sink; 3. Ventilation cover; 4. Exhaust hood; 5. First heat dissipation fin; 6. Second heat dissipation fin; 7. First fan; 8. Second fan; 9. C-shaped cavity; 91. First water tank; 92. Variable frequency water pump; 93. First water pipe; 94. Second water tank; 941. Float; 942. Contact floating rod; 95. Second water pipe; 96. Third water pipe; 97. Fifth heat dissipation fin; 10. Third heat dissipation fin; 11. Mounting seat; 12. Wiring seat; 13. Water inlet pipe; 14. Water outlet pipe; 15. Connecting strip; 16. Second spring; 17. First wedge-shaped contact block; 18. First contact rod; 19. Third spring; 20. Brush cleaning strip; 201. Sliding bracket; 202. Second wedge-shaped contact block; 21. Fourth spring; 22. First contact bracket; 23. Second contact bracket; 24. Fifth spring; 25. Sixth spring; 26. Third contact wedge; 27. Strip-shaped plate; 28. Air guide plate; 29. Gear; 30. L-shaped rack; 31. Guide rod; 32. Contact strip; 33. Fourth contact wedge; 34. Seventh spring. Specific implementation mode

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] Embodiment 1, please refer to Figures 1 to 10 , a combined high-current relay, including a relay base 1, a hollow heat sink 2 is arranged below the relay base 1, a plurality of bases 101 are arranged in the relay base 1, iron cores 102 are installed on the plurality of bases 101, coils 103 are arranged on the iron cores 102, an armature piece 104 is rotatably connected above the base 101, a moving contact 105 is fixed at one end of the armature piece 104, and a first spring 106 is connected between the armature piece 104 and the base 101. A plurality of normally closed contacts 107 and normally open contacts 108 are respectively arranged on the relay base 1; A plurality of first heat dissipation fins 5 and second heat dissipation fins 6 are respectively arranged on the upper and lower sides inside the hollow heat sink 2, and a ventilation cover 3 and an exhaust hood 4 are respectively installed at both ends of the hollow heat sink 2. A first fan 7 is installed on the ventilation cover 3, a second fan 8 is fixed on the exhaust hood 4, a C-shaped cavity 9 is opened on the hollow heat sink 2, and a liquid cooling circulation component is fixed on the hollow heat sink 2, and the liquid cooling circulation component is communicated with the C-shaped cavity 9.

[0032] On both outer side surfaces of the hollow heat sink 2, a number of third heat dissipation fins 10 are provided, and two mounting seats 11 are fixed below the hollow heat sink 2. A wiring seat 12 is installed on the side surface of the relay base 1. A water inlet pipe 13 and a water outlet pipe 14 are respectively installed on the hollow heat sink 2, and both the water inlet pipe 13 and the water outlet pipe 14 are communicated with the U-shaped cavity 9.

[0033] The liquid cooling circulation assembly includes a first water tank 91. The first water tank 91 is fixed below the hollow heat sink 2, and a variable frequency water pump 92 is fixed at one end of the first water tank 91. The water outlet of the first water tank 91 is communicated with the water inlet of the variable frequency water pump 92. A first water pipe 93 is connected between the water outlet of the variable frequency water pump 92 and the water inlet pipe 13. A second water tank 94 is fixed on the ventilation hood 3. A second water pipe 95 is connected between the water inlet of the second water tank 94 and the water outlet pipe 14. A third water pipe 96 is connected between the second water tank 94 and the first water tank 91. A number of fifth heat dissipation fins 97 are fixed on the surface of the first water tank 91.

[0034] During use, refer to Figure 1-Figure 4 , the relay base 1 is installed on the hollow heat sink 2. Through the cooperation of the relay base 1 and a number of bases 101, iron cores 102, coils 103, armature plates 104, moving contacts 105, first springs 106, normally closed contacts 107 and normally open contacts 108, a combined high-current relay is formed. Energized state: When the coil 103 is energized, the generated magnetic field is sufficient to overcome the mechanical resistance between the armature plate 104 and the first spring 106. The armature plate 104 drives the moving contact 105 to deflect, and the moving contact 105 is attracted to the normally open contact 108, and the working circuit is closed, and the motor or other load devices start to work. De-energized state: When the coil 103 is de-energized, the magnetic field disappears, and the armature plate 104 returns to the initial position under the action of the first spring 106. The moving contact 105 contacts the normally closed contact 107, and the working circuit is disconnected, and the load device stops working. Multiple circuits can be controlled simultaneously to achieve more complex control functions. The heat generated during the working process of the relay is transferred to the hollow heat sink 2, which can reduce its own temperature. Through the cooperation of the first heat dissipation fins 5, the second heat dissipation fins 6 and the two third heat dissipation fins 10 on the hollow heat sink 2, the heat on the hollow heat sink 2 can be dissipated, thereby reducing the temperature. Start the first fan 7 installed on the ventilation hood 3 and the second fan 8 installed on the exhaust hood 4. The first fan 7 and the second fan 8 can form an effective air circulation system inside the hollow heat sink 2 to ensure that the heat dissipated from the first heat dissipation fins 5 and the second heat dissipation fins 6 of the hollow heat sink 2 can be discharged in time, avoiding heat accumulation, thereby improving the heat dissipation effect of the hollow heat sink 2; Refer to Figure 1-Figure 5When the temperature inside the relay base 1 is relatively high, the variable-frequency water pump 92 is started. The variable-frequency water pump 92 is connected to the water inlet pipe 13 on the hollow heat sink 2 through the first water pipe 93, so as to achieve the purpose of transporting the coolant in the first water tank 91 into the U-shaped cavity 9. When the coolant gradually rises, the heat in the hollow heat sink 2 can be conducted into the coolant, quickly reducing the internal temperature of the hollow heat sink 2. The coolant is discharged into the second water tank 94 through the second water pipe 95 connected to the water outlet pipe 14, and then flows back into the first water tank 91 through the third water pipe 96 on the second water tank 94, so as to achieve the purpose that the coolant can circulate and quickly take away the heat from the hollow heat sink 2. The heat in the first water tank 91 can be dissipated through a plurality of fifth heat dissipation fins 97, thereby reducing the temperature of the coolant. By the combined use of air cooling and liquid cooling, the relay heat dissipation time can be reduced, the heat dissipation effect can be improved, and the metal fatigue of the internal metal components of the relay can be avoided, so as not to affect the service life of the relay.

[0035] Embodiment 2 is an improvement made on the basis of Embodiment 1. Specifically, please refer to Figures 1 to 10 A plurality of first heat dissipation fins 5 are all slidably connected in the U-shaped cavity 9, and a connecting strip 15 is fixed between the plurality of first heat dissipation fins 5. The connecting strip 15 is located in the U-shaped cavity 9, and two of the first heat dissipation fins 5 are elastically connected to the hollow heat sink 2 through a second spring 16.

[0036] A first wedge-shaped abutting block 17 is fixed on one of the first heat dissipation fins 5, and a first abutting rod 18 is arranged in the U-shaped cavity 9. The first abutting rod 18 is elastically connected to the hollow heat sink 2 through a third spring 19.

[0037] A floating block 941 is arranged in the second water tank 94, and a resisting floating rod 942 is fixed on the floating block 941. The resisting floating rod 942 is slidably connected to the second water tank 94, and the resisting floating rod 942 is located below the first abutting rod 18.

[0038] In order to reduce the temperature of the coolant inside the U-shaped cavity 9 and increase the cooling duration, refer to Figure 3-Figure 8, the variable-frequency water pump 92 has variable-frequency characteristics and can change the size of the water flow in the pipeline. When the variable-frequency water pump 92 is at a low frequency, the flow rate of the coolant in the third water pipe 96 is slow. When the variable-frequency water pump 92 is at a high frequency, the flow rate of the coolant in the third water pipe 96 is fast, which promotes the formation of a liquid level difference inside the second water tank 94. The liquid level in the second water tank 94 increases, enabling the floating block 941 to be driven by the buoyancy of the coolant to drive the contact floating rod 942 to slide vertically upward on the second water tank 94, achieving the purpose of contacting the first contact rod 18. This causes the first contact rod 18 to slide on the hollow heat sink 2 and be resisted by the third spring 19. When one end of the first contact rod 18 contacts the first wedge-shaped contact block 17, the first heat dissipation fin 5 can slide in the U-shaped cavity 9, and the second spring 16 is蓄力. In the initial state, most of the area of the first heat dissipation fin 5 is located in the U-shaped cavity 9 and contacts the coolant, enabling heat transfer and adsorption, thereby reducing the temperature of the coolant and extending the cooling time. When the first heat dissipation fin 5 slides vertically downward in the U-shaped cavity 9, the contact area with the coolant in the U-shaped cavity 9 is reduced. At this time, the contact area with the air circulation system is increased, allowing the heat adsorbed on the first heat dissipation fin 5 to be quickly dissipated and the temperature to be reduced. When the variable-frequency water pump 92 changes frequency, the floating block 941 can drive the contact floating rod 942 to move up and down reciprocally, indirectly achieving the purpose of the first heat dissipation fin 5 reciprocally moving on the hollow heat sink 2, continuously adsorbing heat and dissipating heat, and further improving the heat dissipation effect of the hollow heat sink 2.

[0039] Reference Fig.10 , the first heat dissipation fin 5 is composed of a plurality of heat conduction columns and heat dissipation strips. The plurality of heat conduction columns are equidistantly distributed on the heat dissipation strip. The heat conduction columns are slidably connected in the U-shaped cavity 9 and fixedly connected to the connecting strip 15. The first wedge-shaped contact block 17 and the second spring 16 are connected to several of the heat conduction columns. The heat conduction columns can ensure the sealing effect with the hollow heat sink 2 through the sealing ring, preventing the coolant from flowing out. The heat dissipation strip is located inside the hollow heat sink 2. The plurality of heat conduction columns conduct heat transfer on the heat in the coolant, and the heat can be dissipated through the heat dissipation strip.

[0040] Embodiment 3, this embodiment is an improvement based on Embodiment 1. Specifically, please refer to Figures 1 to 10 , sliding brackets 201 are fixedly arranged on both sides of the hollow heat sink 2. A plurality of brush cleaning strips 20 are slidably connected to the sliding brackets 201, and the plurality of brush cleaning strips 20 are in contact with the surface of the third heat dissipation fin 10. A fourth spring 21 is connected between one end of the brush cleaning strip 20 and the sliding bracket 201, and a second wedge-shaped contact block 202 is fixedly arranged at the other end of the brush cleaning strip 20.

[0041] A first contact bracket 22 and a second contact bracket 23 are slidingly connected to the ventilation hood 3, respectively; a fifth spring 24 is connected between the first contact bracket 22 and the ventilation hood 3, and the first contact bracket 22 contacts a part of the second wedge-shaped contact block 202; a sixth spring 25 is connected between the second contact bracket 23 and the ventilation hood 3, and the second contact bracket 23 contacts another part of the second wedge-shaped contact block 202; third contact wedge blocks 26 are fixed on both sides of the contact float rod 942, and one end of the first contact bracket 22 and the second contact bracket 23 contacts the two third contact wedge blocks 26, respectively.

[0042] Two strip plates 27 are fixed on the surface of the ventilation cover 3 , and a plurality of equally spaced air guide plates 28 are rotatably connected to the strip plates 27 . The air guide plates 28 are located on one side of the first fan 7 , and a gear 29 is fixed to one end of the air guide plates 28 .

[0043] An L-shaped rack 30 is meshedly connected to the gear 29, a guide rod 31 is fixed to the ventilation hood 3, the L-shaped rack 30 is elastically connected to the guide rod 31 through a seventh spring 34, a resistance bar 32 is fixed to the second resistance bracket 23, a fourth resistance wedge 33 is fixed to one end of the L-shaped rack 30, and the resistance bar 32 is in resistance with the fourth resistance wedge 33.

[0044] Since the third heat sink fins 10 on both sides of the hollow heat sink block 2 are in contact with the air for a long time during operation, dust is easily attached to the surface, which will affect the efficiency during the heat dissipation process. Figure 1-Figure 9 When the two third contact wedges 26 fixed on the contact floating rod 942 move vertically, they can respectively contact the first contact bracket 22 and the second contact bracket 23, so that the first contact bracket 22 moves horizontally on the ventilation hood 3 and contacts the second wedge-shaped contact block 202 fixed at one end of the partial brush cleaning strip 20. The fifth spring 24 accumulates force, and the partial second wedge-shaped contact block 202 slides vertically on the sliding bracket 201 when being contacted. The fourth spring 21 accumulates force, so that the partial brush cleaning strip 20 automatically cleans the dust on the surface of the third heat dissipation fin 10 on one side, and at the same time When the second abutting bracket 23 abuts against another third abutting wedge block 26, the second abutting bracket 23 moves horizontally on the ventilation hood 3 and abuts against the second wedge-shaped abutting block 202 fixed at one end of the other part of the brush cleaning strip 20, the sixth spring 25 accumulates force, and the other part of the second wedge-shaped abutting block 202 slides vertically on the sliding bracket 201 when abutted, and the fourth spring 21 accumulates force, prompting the other part of the brush cleaning strip 20 to automatically clean the dust on the surface of the third heat sink fin 10 on the other side, which can greatly improve the heat dissipation effect of the third heat sink fins 10 on both sides of the hollow heat sink block 2; In order to reduce the heat dissipation dead angle inside the hollow heat dissipation block 2, refer to Figure 6-Figure 7When the second interference bracket 23 moves horizontally on the ventilation hood 3, it can achieve the purpose of driving the interference bar 32 to interfere with the fourth interference wedge 33 fixed at one end of the L-shaped rack 30, prompting the L-shaped rack 30 to slide vertically on the guide rod 31, and the seventh spring 34 accumulates force. During the vertical movement of the L-shaped rack 30, it can drive the gears 29 fixed at one end of the several air guide plates 28 to rotate, prompting the several air guide plates 28 to swing back and forth on the two strip plates 27, which can achieve the purpose of automatically adjusting the wind direction of the first fan 7, prompting the automatic adjustment of the air flow direction flowing inside the hollow heat dissipation block 2, thereby reducing the heat dissipation dead angle and improving the heat dissipation effect.

[0045] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0046] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A combined high current relay, comprising a relay base (1), characterized in that: A hollow heat sink (2) is provided below the relay base (1). A number of bases (101) are provided in the relay base (1). Cores (102) are mounted on the number of bases (101). Coils (103) are provided on the cores (102). An armature plate (104) is rotatably connected above the base (101). A moving contact (105) is fixed at one end of the armature plate (104). A first spring (106) is connected between the armature plate (104) and the base (101). A number of normally closed contacts (107) and normally open contacts (108) are respectively provided on the relay base (1). The normally closed contacts (107) are located above the normally open contacts (108). A number of first heat dissipation fins (5) and second heat dissipation fins (6) are respectively provided on the upper and lower sides inside the hollow heat sink (2). Ventilation covers (3) and exhaust covers (4) are respectively mounted at both ends of the hollow heat sink (2). A first fan (7) is mounted on the ventilation cover (3). A second fan (8) is fixed on the exhaust cover (4). A U-shaped cavity (9) is formed on the hollow heat sink (2). A liquid cooling circulation assembly is fixed on the hollow heat sink (2). The liquid cooling circulation assembly is communicated with the U-shaped cavity (9).

2. The combined high current relay according to claim 1, characterized in that: A number of third heat dissipation fins (10) are provided on both outer side surfaces of the hollow heat sink (2). Two mounting seats (11) are fixed below the hollow heat sink (2). A wiring seat (12) is mounted on the side surface of the relay base (1). A water inlet pipe (13) and a water outlet pipe (14) are respectively mounted on the hollow heat sink (2). The water inlet pipe (13) and the water outlet pipe (14) are both communicated with the U-shaped cavity (9).

3. The combined high current relay according to claim 2, characterized in that: The liquid cooling circulation assembly includes a first water tank (91). The first water tank (91) is fixed below the hollow heat sink (2). A variable frequency water pump (92) is fixed at one end of the first water tank (91). The water outlet of the first water tank (91) is communicated with the water inlet of the variable frequency water pump (92). A first water pipe (93) is connected between the water outlet of the variable frequency water pump (92) and the water inlet pipe (13). A second water tank (94) is fixed on the ventilation cover (3). A second water pipe (95) is connected between the water inlet of the second water tank (94) and the water outlet pipe (14). A third water pipe (96) is connected between the second water tank (94) and the first water tank (91). A number of fifth heat dissipation fins (97) are fixed on the surface of the first water tank (91).

4. The combined high current relay according to claim 3, characterized in that: A number of the first heat dissipation fins (5) are fixedly and slidably connected in the U-shaped cavity (9). A connecting bar (15) is fixed between the number of the first heat dissipation fins (5). The connecting bar (15) is located in the U-shaped cavity (9). Two of the first heat dissipation fins (5) are elastically connected to the hollow heat sink (2) through a second spring (16).

5. The combined high current relay according to claim 4, characterized in that: One of the first heat dissipation fins (5) is fixed with a first wedge-shaped抵触 block (17). A first抵触 rod (18) is arranged in the C-shaped cavity (9). The first抵触 rod (18) is elastically connected with the hollow heat dissipation block (2) through a third spring (19).

6. The combined high current relay according to claim 5, characterized in that: A floating block (941) is arranged in the second water tank (94). A抵触 floating rod (942) is fixed on the floating block (941). The抵触 floating rod (942) is slidably connected to the second water tank (94). The抵触 floating rod (942) is located below the first抵触 rod (18).

7. The combined high current relay according to claim 6, characterized in that: Sliding brackets (201) are fixed on both sides of the hollow heat dissipation block (2). A plurality of brush cleaning strips (20) are slidably connected to the sliding brackets (201). And the plurality of brush cleaning strips (20) are in contact with the surface of the third heat dissipation fins (10). A fourth spring (21) is connected between one end of the brush cleaning strip (20) and the sliding bracket (201). A second wedge-shaped抵触 block (202) is fixed at the other end of the brush cleaning strip (20).

8. The combined high current relay according to claim 7, characterized in that: A first抵触 bracket (22) and a second抵触 bracket (23) are respectively slidably connected to the ventilation hood (3). A fifth spring (24) is connected between the first抵触 bracket (22) and the ventilation hood (3). And the first抵触 bracket (22)抵触s against some of the second wedge-shaped抵触 blocks (202). A sixth spring (25) is connected between the second抵触 bracket (23) and the ventilation hood (3). And the second抵触 bracket (23)抵触s against another part of the second wedge-shaped抵触 blocks (202). Third抵触 wedge blocks (26) are fixed on both sides of the抵触 floating rod (942). One ends of the first抵触 bracket (22) and the second抵触 bracket (23) respectively抵触 against the two third抵触 wedge blocks (26).

9. The combined high current relay according to claim 8, characterized in that: Two strip plates (27) are fixed on the surface of the ventilation hood (3). A plurality of equally spaced air guiding plates (28) are rotatably connected to the strip plates (27). The air guiding plates (28) are located on one side of the first fan (7). And a gear (29) is fixed at one end of the air guiding plate (28).

10. The combined high current relay according to claim 9, characterized in that: An L-shaped rack (30) is meshed with the gear (29). A guiding rod (31) is fixed on the ventilation hood (3). The L-shaped rack (30) is elastically connected with the guiding rod (31) through a seventh spring (34). A抵触 strip (32) is fixed on the second抵触 bracket (23). A fourth抵触 wedge block (33) is fixed at one end of the L-shaped rack (30). The抵触 strip (32)抵触s against the fourth抵触 wedge block (33).

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