Three-phase solid-state relay

Abstract

The utility model belongs to the technical field of solid-state relays, and particularly relates to a three-phase solid-state relay which comprises a three-phase solid-state relay main body and a heat dissipation aluminum sheet, the three-phase solid-state relay main body is fixedly installed on the heat dissipation aluminum sheet, a heat dissipation assembly is installed outside the three-phase solid-state relay main body, and the heat dissipation assembly is fixedly installed on the heat dissipation aluminum sheet. The heat dissipation assembly comprises a U-shaped shell, and the inner wall of the shell is attached to the outer wall of the three-phase solid-state relay body. Heat generated by operation of the three-phase solid-state relay main body is led out through the heat dissipation aluminum sheet, air flow generated by the fan assembly enters the interior of the three-phase solid-state relay main body through the upper ventilation holes for heat dissipation and then is discharged through the lower ventilation holes and the air outlet holes, heat dissipation is conducted on the heat dissipation aluminum sheet again, and the heat dissipation efficiency of the three-phase solid-state relay main body is improved. And compared with the prior art, the direct heat dissipation effect of the three-phase solid-state relay main body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of solid state relays, in particular to a three-phase solid state relay. Background Technique

[0002] A solid state relay is an electronic switching device that can control a larger load current or voltage through a smaller current control signal, and can play important roles such as automatic regulation, safety protection, and circuit conversion in a circuit. Since the load of the solid state relay is significantly related to the ambient temperature, as the temperature rises, the load capacity will rapidly decline, causing the solid state relay to overheat and its characteristics to deteriorate. In severe cases, it may get out of control or even cause permanent damage.

[0003] The existing Chinese patent with the publication number CN207834210U discloses an air-cooled three-phase solid state relay, including a three-phase solid state module body. A heat dissipation body is fixedly provided at the bottom of the three-phase solid state module body. Ventilation holes penetrate through the interior of the heat dissipation body. A plurality of heat dissipation fins are arranged at intervals on both opposite outer side walls of the heat dissipation body. A fan is fixedly provided on one side wall of the heat dissipation body at the end face of the ventilation hole. An air outlet hole communicating with the internal cavity of the three-phase solid state module body is provided on the three-phase solid state module body. An air inlet hole communicating with the internal cavity of the three-phase solid state module body is provided on the wall of the ventilation hole.

[0004] In view of the above and related existing technologies, the inventor believes that the following defects often exist: the air duct generated by the operation of the fan of the device is staggered from the three-phase solid state module body, resulting in limited air flow entering the interior of the three-phase solid state module through the air inlet hole, and the heat dissipation effect on the interior of the three-phase solid state module needs to be further improved and requires improvement. Therefore, a three-phase solid state relay is proposed to solve the above problems. Content of the Utility Model

[0005] In order to make up for the deficiencies of the prior art and solve the above-mentioned technical problems, the utility model proposes a three-phase solid state relay.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a three-phase solid-state relay described in the utility model includes a three-phase solid-state relay body and a heat dissipation aluminum sheet, and the three-phase solid-state relay body includes an input module, a phase sequence detection module, a signal processing module, a drive module, and a power component module; the input module is used to convert the external power supply into a DC power supply required inside the relay, and is used to access the forward and reverse control, and send the control signal to the signal processing module; the phase sequence detection module is used to detect the phase sequence of the three-phase power supply and send it to the signal processing module; the signal processing module receives the forward and reverse control signal and the phase sequence signal, and sends the relay drive signal to the drive module after processing; the drive module is used to The control signal is processed and sent to the power component module; the power component module is used to receive the signal sent by the drive module and control the forward and reverse rotation of the motor through the signal. The three-phase solid-state relay body is fixedly installed on the heat dissipation aluminum sheet, and a heat dissipation component is installed on the outside of the three-phase solid-state relay body. The heat dissipation component includes a U-shaped shell, and the inner wall of the shell fits the outer wall of the three-phase solid-state relay body. The shell is fixedly installed on the heat dissipation aluminum sheet by bolt connection or clamping. A ventilation channel is opened on the top of the shell, and a fan assembly is installed above the ventilation channel. The upper and lower walls of the three-phase solid-state relay body are respectively provided with ventilation holes, and the surface of the heat dissipation aluminum sheet is provided with air outlet holes corresponding to the ventilation holes.

[0007] The heat generated by the operation of the three-phase solid-state relay body is conducted out through the heat sink aluminum sheet, and the fan assembly is operated. The airflow generated by the fan assembly enters the interior of the three-phase solid-state relay body through the upper ventilation holes for heat dissipation, and is then discharged from the lower ventilation holes and air outlets to dissipate the heat to the heat sink aluminum sheet again, thereby improving the heat dissipation effect of the three-phase solid-state relay body and the heat sink aluminum sheet. Compared with the prior art, the direct heat dissipation effect of the three-phase solid-state relay body is improved.

[0008] Preferably, the ventilation holes on the upper and lower walls of the three-phase solid-state relay body are staggered.

[0009] Preferably, the air outlet holes correspond to the positions and number of the ventilation holes on the lower wall of the three-phase solid-state relay body.

[0010] Preferably, the fan assembly comprises a fixed frame, the fixed frame is located above the three-phase solid-state relay body and the housing, and a plurality of fan bodies are fixedly connected inside the fixed frame.

[0011] Preferably, a temperature sensor is fixedly connected to the interior of the three-phase solid-state relay body, and the temperature sensor is electrically connected to the fan body. The temperature inside the three-phase solid-state relay body is monitored by the temperature sensor. When the temperature is too high, the fan body is controlled to operate for air cooling.

[0012] Preferably, a filter screen is fixedly connected to the top of the fixed frame, and dust in the external airflow is filtered through the filter screen.

[0013] Preferably, the side walls of the fixed frame are fixedly connected with a plurality of fixing ears for bolts to pass through, and a shock-absorbing ring is bonded to the inside of the fixing ear, which is connected to the threaded barrel by bolts, and the fan assembly is fixed to the shell for use. The shock-absorbing ring can reduce the vibration of the fan body transmitted to the shell through the screws during operation, thereby making the operation of the three-phase solid-state relay body more stable.

[0014] Preferably, a plurality of threaded cylinders are fixedly connected to the top of the shell.

[0015] Preferably, a rubber pad is fixedly connected to the top of the shell, which can reduce the vibration of the fan body transmitted to the shell during operation, making the operation of the three-phase solid-state relay body more stable. At the same time, the rubber pad is used to seal the intersection of the fixed frame and the shell, reducing the discharge amount of the airflow generated by the fan body from the gap between the two, thereby improving the utilization efficiency of the airflow.

[0016] The utility model is beneficial in that:

[0017] 1. The heat generated by the operation of the three-phase solid-state relay body of the utility model is conducted out through the heat dissipation aluminum sheet. The airflow generated by the fan assembly enters the interior of the three-phase solid-state relay body through the upper ventilation holes for heat dissipation, and is then discharged from the lower ventilation holes and air outlets to dissipate the heat of the heat dissipation aluminum sheet again, thereby improving the utilization efficiency of the airflow. Compared with the prior art, the direct heat dissipation effect of the three-phase solid-state relay body is improved.

[0018] 2. The utility model can reduce the vibration transmitted from the fan body to the housing during operation through the cooperation of the shock-absorbing ring and the rubber pad, making the operation of the three-phase solid-state relay body more stable. At the same time, the intersection of the fixed frame and the housing is sealed by the rubber pad, reducing the discharge amount of the airflow generated by the fan body from the gap between the two, thereby improving the utilization efficiency of the airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 For this utility model Figure 1 Bottom view of

[0022] Figure 3 This is a schematic diagram of the structure of the heat dissipation component of the utility model;

[0023] Figure 4 It is a cross-sectional view of the housing of the utility model;

[0024] Figure 5 This is a schematic diagram of the expanded structure of the fan assembly of the utility model.

[0025] In the figure: 1. Three-phase solid-state relay body; 2. Heat dissipation aluminum sheet; 3. Heat dissipation assembly; 31. Shell; 32. Ventilation duct; 4. Fan assembly; 41. Fixed frame; 42. Fan body; 43. Filter screen; 44. Fixed ear; 45. Shock-absorbing ring; 5. Ventilation hole; 6. Air outlet; 7. Bolt; 8. Threaded cylinder; 9. Rubber pad. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Embodiment 1

[0028] See also Figures 1-4 As shown, a three-phase solid-state relay includes a three-phase solid-state relay body 1 and a heat sink aluminum sheet 2. The three-phase solid-state relay body 1 is fixedly mounted on the heat sink aluminum sheet 2. A heat sink assembly 3 is installed on the outside of the three-phase solid-state relay body 1. The heat sink assembly 3 includes a U-shaped shell 31. The inner wall of the shell 31 fits the outer wall of the three-phase solid-state relay body 1. The shell 31 is fixedly mounted on the heat sink aluminum sheet 2 by bolts 7 or by clamping. A ventilation channel 32 is opened on the top of the shell 31. A fan assembly 4 is installed above the ventilation channel 32. Ventilation holes 5 are respectively opened on the upper and lower walls of the three-phase solid-state relay body 1. Air outlet holes 6 are opened on the surface of the heat sink aluminum sheet 2 corresponding to the ventilation holes 5.

[0029] The heat generated by the operation of the three-phase solid-state relay body 1 is conducted out through the heat sink aluminum sheet 2, and the fan assembly 4 is operated. The airflow generated by the fan assembly 4 enters the interior of the three-phase solid-state relay body 1 through the upper ventilation holes 5 for heat dissipation, and is then discharged from the lower ventilation holes 5 and the air outlet holes 6 to dissipate the heat of the heat sink aluminum sheet 2 again, thereby improving the heat dissipation effect of the three-phase solid-state relay body 1 and the heat sink aluminum sheet 2, and improving the direct heat dissipation effect of the three-phase solid-state relay body 1.

[0030] The ventilation holes 5 on the upper and lower walls of the three-phase solid-state relay body 1 are staggered.

[0031] The air outlet holes 6 correspond to the ventilation holes 5 on the lower wall of the three-phase solid-state relay body 1 in terms of position and quantity.

[0032] Embodiment 2

[0033] Comparing with Embodiment 1, please refer to Figure 5 As shown, the present utility model provides another implementation manner. The fan assembly 4 includes a fixed frame 41 which is located above the three-phase solid-state relay body 1 and the housing 31. A plurality of fan bodies 42 are fixedly connected inside the fixed frame 41.

[0034] A temperature sensor is fixedly connected inside the three-phase solid-state relay body 1, and the temperature sensor is electrically connected to the fan body 42. The temperature inside the three-phase solid-state relay body 1 is monitored through the temperature sensor. When the temperature is too high, the fan body 42 is controlled to operate for air cooling.

[0035] A filter screen plate 43 is fixedly connected to the top of the fixed frame 41 to filter dust in the external air flow through the filter screen plate 43.

[0036] A plurality of fixing ears 44 through which bolts 7 pass are fixedly connected to the side wall of the fixed frame 41. A shock-absorbing ring 45 is bonded inside the fixing ears 44. The fan assembly 4 is fixed to the housing 31 for use by connecting with the threaded cylinder 8 through the bolts 7. The shock-absorbing ring 45 can weaken the vibration transmitted to the housing 31 through the screws during the operation of the fan body 42, making the operation of the three-phase solid-state relay body 1 more stable.

[0037] A plurality of threaded cylinders 8 are fixedly connected to the top of the housing 31.

[0038] A rubber pad 9 is fixedly connected to the top of the housing 31. The rubber pad 9 can weaken the vibration transmitted to the housing 31 during the operation of the fan body 42, making the operation of the three-phase solid-state relay body 1 more stable. At the same time, the rubber pad 9 seals the intersection of the fixed frame 41 and the housing 31, reducing the discharge amount of the air flow generated by the fan body 42 from the gap between the two, and improving the utilization efficiency of the air flow.

[0039] Parts not involved in this device are the same as the prior art or can be implemented by using the prior art.

[0040] Working principle: The heat generated during the operation of the three-phase solid-state relay body 1 is dissipated through the heat sink fin 2. When the fan assembly 4 operates, the airflow generated by the fan assembly 4 enters the interior of the three-phase solid-state relay body 1 through the upper ventilation hole 5 for heat dissipation, and then is discharged from the lower ventilation hole 5 and the air outlet hole 6, and then dissipates heat from the heat sink fin 2 again, thereby improving the heat dissipation effect of the three-phase solid-state relay body 1 and the heat sink fin 2, and enhancing the direct heat dissipation effect on the three-phase solid-state relay body 1.

[0041] The fan assembly 4 is connected to the threaded cylinder 8 through the bolt 7 and fixed on the housing 31 for use. The shock-absorbing ring 45 can weaken the vibration transmitted to the housing 31 through the screw during the operation of the fan body 42, making the operation of the three-phase solid-state relay body 1 more stable. The rubber pad 9 seals the intersection of the fixed frame 41 and the housing 31, reducing the discharge amount of the airflow generated by the fan body 42 from the gap between the two, and improving the utilization efficiency of the airflow.

[0042] In the description of this specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0043] The above shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A three-phase solid-state relay, comprising a three-phase solid-state relay body (1) and a heat dissipation aluminum sheet (2), wherein the three-phase solid-state relay body (1) is fixedly installed on the heat dissipation aluminum sheet (2), and is characterized in that: A heat dissipation component (3) is installed outside the three-phase solid-state relay body (1). The heat dissipation component (3) includes a U-shaped housing (31). The inner wall of the housing (31) is attached to the outer wall of the three-phase solid-state relay body (1). The housing (31) is fixedly installed on a heat dissipation aluminum fin (2). A ventilation channel (32) is opened at the top of the housing (31). A fan assembly (4) is installed above the ventilation channel (32). Ventilation holes (5) are respectively opened on the upper and lower walls of the three-phase solid-state relay body (1). Air outlet holes (6) are opened on the surface of the heat dissipation aluminum fin (2) corresponding to the ventilation holes (5).

2. The three-phase solid-state relay according to claim 1, characterized in that: The ventilation holes (5) on the upper and lower walls of the three-phase solid-state relay body (1) are staggered.

3. The three-phase solid-state relay according to claim 1, characterized in that: The positions and numbers of the air outlet holes (6) correspond to those of the ventilation holes (5) on the lower wall of the three-phase solid-state relay body (1).

4. The three-phase solid-state relay according to claim 1, wherein: The fan assembly (4) includes a fixed frame (41). The fixed frame (41) is located above the three-phase solid-state relay body (1) and the housing (31). A number of fan bodies (42) are fixedly connected inside the fixed frame (41).

5. The three-phase solid-state relay according to claim 4, wherein: A temperature sensor is fixedly connected inside the three-phase solid-state relay body (1), and the temperature sensor is electrically connected to the fan body (42).

6. The three-phase solid-state relay according to claim 4, characterized in that: A filter screen plate (43) is fixedly connected to the top of the fixed frame (41).

7. The three-phase solid-state relay according to claim 4, wherein: A number of fixing ears (44) through which bolts (7) pass are fixedly connected to the side wall of the fixed frame (41). A shock-absorbing ring (45) is bonded inside the fixing ear (44).

8. The three-phase solid-state relay according to claim 4, wherein: A number of threaded cylinders (8) are fixedly connected to the top of the housing (31).

9. The three-phase solid-state relay according to claim 4, characterized in that: A rubber pad (9) is fixedly connected to the top of the housing (31).

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