Heat preservation and heat dissipation device of frequency converter

Abstract

The invention discloses a frequency converter heat preservation and heat dissipation device which comprises a frequency converter cabinet body, an air inlet is formed in the side portion of the lower end of the frequency converter cabinet body, an air outlet is formed in the upper end face of the frequency converter cabinet body, a turbine heat dissipation fan is installed in the air outlet, and an air guide box is installed on the upper end face of the frequency converter cabinet body. The air guide box covers the periphery of the air outlet, an exhaust pipe is installed on the side portion of the upper end of the air guide box, and an exhaust outlet of the exhaust pipe communicates with the outside through an axial flow fan. According to the device, cooling can be effectively achieved, the excellent heat preservation effect can be achieved, the cooling function and the heat preservation function can be freely switched, different use requirements are met, the device is low in improvement cost and maintenance cost and low in failure rate, it is ensured that equipment can safely and stably operate for a long period, and the device is suitable for popularization and application. A more economical, efficient and reliable choice is provided for solving the problems of ventilation and heat preservation of the frequency converter, and the energy-saving and consumption-reducing effects are remarkable.

Description

Technical Field

[0001] The present application relates to the technical field of frequency converters, and in particular to a heat preservation and heat dissipation device for a frequency converter. Background Art

[0002] A variable-frequency drive (VFD) is a power control device that uses the on-off function of power semiconductor devices to convert industrial frequency power into another frequency. It is also called a variable frequency drive or drive controller. It is mainly composed of rectification (AC to DC), filtering, inversion (DC to AC), braking unit, drive unit, detection unit, microprocessor unit, etc.

[0003] When the inverter is working, its internal power electronic devices (such as IGBT, rectifier, inverter, etc.) will generate a lot of heat. If this heat is not dissipated in time, it will cause the internal temperature of the inverter to rise, thus affecting its normal operation. Currently, the heat inside the inverter is mostly discharged through the cooling fan on the top of the inverter cabinet to dissipate the heat.

[0004] The internal components of the inverter are sensitive to ambient temperature. When the ambient temperature is too high, the electronic components of the inverter may be damaged, and when the ambient temperature is too low, it may cause tripping. At present, there are two main ways to cool the inverter: a dedicated ventilation system for the inverter room or adding air conditioning. Although it can solve the cooling problem to a certain extent, it is costly, consumes a lot of power, and requires frequent maintenance in the later stage. In addition, the failure rate is high, resulting in poor operating stability, increasing the risk of inverter tripping, and increasing the operating costs of the enterprise. In addition, the unsafe and unreliable operation of the equipment will also have an adverse impact on actual production. Therefore, it is particularly important to find a more economical, efficient and reliable way to cool the inverter. Summary of the invention

[0005] To this end, the present application provides a frequency converter thermal insulation and heat dissipation device to solve the problems of high cost, high power consumption, frequent subsequent maintenance, and high failure rate in the prior art, resulting in poor operating stability, increased frequency converter tripping risk and enterprise operating costs.

[0006] In order to achieve the above objectives, this application provides the following technical solutions:

[0007] The inverter heat preservation and heat dissipation device comprises an inverter cabinet, the lower end side of the inverter cabinet has an air inlet, the upper end surface of the inverter cabinet has an air outlet, and a turbine heat dissipation fan is installed in the air outlet, the upper end surface of the inverter cabinet is installed with an air guide box, and the air guide box is covered and arranged on the periphery of the air outlet, the upper end side of the air guide box is installed with an exhaust pipe, and the exhaust port of the exhaust pipe is connected to the outside through an axial flow fan;

[0008] The axial flow fan is installed in the pre-installed hole of the wall, and the exhaust port of the axial flow fan extends to the outside of the wall and is covered with a shutter;

[0009] An air supply port is provided on the outer wall of the lower end of the air guide box, and a baffle for adjusting the size of the opening is installed at the air supply port.

[0010] Optionally, the device also includes a motor for driving the blinds blades to flip, the motor is installed on the side of the wall located indoors, and a winding wheel extending to the outside of the room is installed on the output shaft of the motor. The free end of the blinds blade rope extends upward and is wound around the winding wheel. The motor drives the winding wheel to rotate and drives the blade rope to be retracted and released, so as to control the opening and closing of the blinds.

[0011] Further optionally, the device also includes a temperature sensor and a controller, the temperature sensor is divided into an indoor temperature sensor and an outdoor temperature sensor and both are connected to the controller, and the indoor and outdoor temperatures are monitored by the controller;

[0012] When the indoor temperature is higher than the set value, the controller drives the axial flow fan to speed up the exhaust;

[0013] When the outdoor temperature is lower than the set value, the controller drives the motor to close the shutters and open the damper.

[0014] Optionally, the baffle can be opened outward or slid vertically to adjust the size of the air supply outlet.

[0015] Optionally, a plurality of groups of air outlets are installed on the upper end surface of the inverter cabinet, and the plurality of groups of air outlets are evenly distributed along the length direction of the inverter cabinet, and a plurality of partitions are installed inside the air guide box, and the plurality of partitions are distributed in parallel along the length direction of the air guide box to divide the inner cavity of the air guide box into a plurality of air guide cavities, each of which corresponds to a group of air outlets and is connected to the exhaust duct.

[0016] Further optionally, at least one air supply outlet is arranged on the periphery of each air guide cavity.

[0017] Further optionally, a horizontally arranged air duct is installed in each air duct cavity, one end of the air duct extends horizontally toward the exhaust duct and passes through the partitions along the way, and one end of the air duct close to the exhaust duct is hingedly installed with a baffle that can be opened into the exhaust duct.

[0018] Further optionally, the end of the exhaust duct connected to the air guide box has a sleeve hole compatible with the air guide duct, the partition is provided with an assembly hole compatible with the air guide duct, and the outer wall of the air guide duct is respectively sealed with the sleeve hole and the inner wall of the assembly hole.

[0019] Compared with the prior art, this application has at least the following beneficial effects:

[0020] By installing an air guide box on the upper end surface of the inverter cabinet to cover the air outlet and the turbine heat dissipation fan, the exhaust duct at the upper end of the side of the air guide box is connected to the outside, so that the heat generated in the inverter cabinet can be discharged to the outside with the wind, and then an axial flow fan is installed at the exhaust port of the exhaust duct, and the axial flow fan is used to absorb air, which can improve the circulation effect of hot air, thereby accelerating the hot air discharge efficiency, avoiding the hot air from gathering in the air guide box and affecting the actual heat dissipation, which is beneficial to the cooling of the inverter;

[0021] When the outdoor ambient temperature is too low, the axial flow fan and the blades of the shutters are closed to make it difficult for the hot air in the air guide box to be discharged to the outside. The air outlet is opened through the baffle to allow the hot air in the air guide box to be discharged to the room through the air outlet, which is beneficial to increase the indoor temperature of the inverter. The continuous operation of the turbine cooling fan allows the heated indoor air to enter the inverter cabinet again through the air inlet, realizing the autonomous circulation of hot air, thereby achieving the purpose of heat preservation of the inverter.

[0022] In summary, the present application has unique advantages. It can not only effectively achieve cooling, but also play an excellent thermal insulation role, and can switch freely between the two functions of cooling and thermal insulation to meet different usage requirements. Moreover, the device has low modification cost and maintenance cost, low failure rate, and can be adjusted according to actual conditions at any time throughout the year, thereby ensuring that the relevant equipment can operate safely and stably for a long period of time. It provides a more economical, efficient and reliable option for solving the problems of inverter ventilation and thermal insulation, with significant energy-saving and consumption-reducing effects, and has great promotion value and application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more intuitively illustrate the prior art and the present application, exemplary drawings are given below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing the present application; for example, those skilled in the art are capable of easily making conventional adjustments or further optimizations to the addition / reduction / attribution division, specific shapes, positional relationships, connection methods, dimensional ratios, etc. of certain units (components) based on the technical concepts and exemplary drawings disclosed in the present application.

[0024] Figure 1 This is a front structural diagram of the inverter heat preservation and heat dissipation device provided in this application;

[0025] Figure 2 A schematic diagram of the cross-sectional structure of the air guide box provided in this application from a top view;

[0026] Figure 3 A schematic diagram of the side structure of the shutters of the inverter thermal insulation and heat dissipation device provided in this application.

[0027] Description of reference numerals:

[0028] 1. Inverter cabinet; 2. Air inlet; 3. Air outlet; 4. Turbine cooling fan; 5. Air guide box; 6. Exhaust duct; 7. Axial fan; 8. Shutter; 9. Partition; 10. Air guide duct; 11. Baffle; 12. Baffle; 13. Motor; 14. Controller. DETAILED DESCRIPTION

[0029] The present application is further described below in detail through specific embodiments in conjunction with the accompanying drawings.

[0030] like Figure 1 As shown, the inverter heat preservation and heat dissipation device comprises an inverter cabinet 1, the lower end side of the inverter cabinet 1 is provided with an air inlet 2, the upper end surface of the inverter cabinet 1 is provided with an air outlet 3, and a turbine heat dissipation fan 4 is installed in the air outlet 3, an air guide box 5 is installed on the upper end surface of the inverter cabinet 1, and the air guide box 5 is covered and arranged on the periphery of the air outlet 3, an exhaust pipe 6 is installed on the upper end side of the air guide box 5, and the exhaust port of the exhaust pipe 6 is connected to the outside through an axial flow fan 7;

[0031] By installing an air guide box 5 on the upper end surface of the inverter cabinet 1 to cover the air outlet 3 and the turbine heat dissipation fan 4, the exhaust pipe 6 at the upper end of the side of the air guide box 5 is connected to the outside, so that the heat generated in the inverter cabinet 1 can be discharged to the outside with the wind, and then by installing an axial flow fan 7 at the exhaust port of the exhaust pipe 6, the axial flow fan 7 is used to absorb air, which can improve the hot air circulation effect, thereby accelerating the hot air discharge efficiency, avoiding the hot air from gathering in the air guide box 5 and affecting the actual heat dissipation, which is beneficial to the cooling of the inverter;

[0032] like Figure 3 As shown, the axial flow fan 7 is installed in the pre-installed hole of the wall, and the exhaust port of the axial flow fan 7 extends to the outside of the wall and is covered with a shutter 8. When cooling is required, the blades of the shutter 8 need to be opened to facilitate the discharge of hot air to the outside. When heat preservation is required, the blades of the shutter 8 need to be closed to prevent heat from escaping to the outside.

[0033] An air outlet is provided on the outer wall of the lower end of the air guide box 5, and a baffle 12 for adjusting the opening size is installed at the air outlet. The baffle 12 can be opened outward or slid vertically to adjust the size of the air outlet, which is specifically divided into the following two situations:

[0034] 1. The top of the baffle 12 is hingedly mounted on the upper wall of the inner cavity of the air outlet through a hinge. The baffle 12 is manually driven or driven by a motor to flip up and down, so as to adjust the size of the air outlet and the opening and closing of the air outlet;

[0035] Second, the inner walls on both sides of the air outlet are provided with vertical slide grooves, and sliders adapted to the vertical slide grooves are installed on both sides of the baffle 12. The baffle 12 can be adjusted by sliding up and down along the vertical slide grooves through the sliders. Manual adjustment or automatic adjustment by a cylinder or electric push rod can be adopted. The baffle 12 can also be driven up and down by a motor in combination with a sling to adjust the size of the air outlet and the opening and closing of the air outlet;

[0036] When the outdoor ambient temperature is too low, the blades of the axial flow fan 7 and the shutters 8 are closed to make it difficult for the hot air in the air guide box 5 to be discharged to the outside. The air supply port is opened by the baffle 12 so that the hot air in the air guide box 5 can be discharged to the room through the air supply port, which is beneficial to increase the indoor temperature of the frequency converter. Then, through the continuous operation of the turbine cooling fan 4, the heated indoor air enters the frequency converter cabinet 1 again through the air inlet 2, realizing the autonomous circulation of hot air, thereby achieving the insulation purpose of the frequency converter.

[0037] Specifically, the device also includes a motor 13 for driving the blades of the Venetian blinds 8 to flip. The motor 13 is installed on the side of the wall located indoors. A winding wheel extending to the outdoors is installed on the output shaft of the motor 13. The free end of the blade pull rope of the Venetian blinds 8 extends upward and is wound around the winding wheel. The motor 13 drives the winding wheel to rotate and drives the blade pull rope to be retracted and released, so as to control the opening and closing of the Venetian blinds 8, which is convenient for selection and use in both cooling and heat preservation situations.

[0038] Furthermore, the device also includes a temperature sensor and a controller 14. The temperature sensor is divided into an indoor temperature sensor and an outdoor temperature sensor and both are connected to the controller 14. The controller 14 monitors the indoor and outdoor temperatures.

[0039] When the indoor temperature is higher than the set value, the controller 14 drives the motor 13 to open the blades of the shutter 8, and then the controller 14 drives the axial flow fan 7 to speed up the exhaust, which is suitable for cooling when the indoor temperature is high;

[0040] When the outdoor temperature is lower than the set value, the controller 14 controls the axial flow fan 7 to stop running, and then the controller 14 drives the motor 13 to run to close the shutter 8 and open the baffle 12. It can be opened manually or automatically. Automatic opening is preferred here, which is suitable for indoor insulation when the outdoor temperature is low.

[0041] Specifically, Figure 2As shown, the upper end surface of the inverter cabinet 1 is equipped with multiple groups of air outlets 3, and the multiple groups of air outlets 3 are evenly distributed along the length direction of the inverter cabinet 1, and a plurality of partitions 9 are installed inside the air guide box 5, and the plurality of partitions 9 are parallelly distributed along the length direction of the air guide box 5 to divide the inner cavity of the air guide box 5 into a plurality of air guide cavities, each of which corresponds to a group of air outlets 3 and is connected to the exhaust pipe 6. Such a design plays a role in guiding hot air, so that the hot air discharged from each group of air outlets 3 can be discharged to the exhaust pipe 6, which is convenient for actual exhaust and heat dissipation;

[0042] Furthermore, at least one air supply port is provided on the periphery of each air guide cavity, so that when heat preservation is used, each air guide cavity can supply air to the room, which is conducive to uniform air supply, so that the air in the frequency conversion room gradually heats up outward with the frequency converter cabinet 1 as the center, which is conducive to improving the actual heat preservation effect;

[0043] Furthermore, a horizontally arranged air duct 10 is installed in each air duct cavity, one end of the air duct 10 extends horizontally toward the exhaust duct 6 and penetrates the partition 9 along the way, and a baffle 11 that can be opened into the exhaust duct 6 is hingedly installed at one end of the air duct 10 close to the exhaust duct 6. By configuring an air duct 10 for each air duct cavity, each air duct cavity can be connected to the exhaust duct 6 separately, avoiding the hot air of each air duct cavity from colliding and accumulating in the air duct box 5, thereby avoiding heat accumulation, and combining with the air suction effect of the axial flow fan 7, it is beneficial to improve the actual exhaust and heat dissipation effect;

[0044] Furthermore, one end of the exhaust duct 6 connected to the air guide box 5 has a sleeve hole (not shown in the figure) compatible with the air guide duct 10, and the partition 9 is provided with an assembly hole (not shown in the figure) compatible with the air guide duct 10. The outer wall of the air guide duct 10 is respectively sealed with the sleeve hole and the inner wall of the assembly hole to ensure that each air guide cavity exists independently and is not connected to each other, so as to actually exhaust and dissipate heat.

[0045] In summary, the present application has unique advantages. It can not only effectively achieve cooling, but also play an excellent thermal insulation role, and can switch freely between the two functions of cooling and thermal insulation to meet different usage requirements. Moreover, the device has low modification cost and maintenance cost, low failure rate, and can be adjusted according to actual conditions at any time throughout the year, thereby ensuring that the relevant equipment can operate safely and stably for a long period of time. It provides a more economical, efficient and reliable option for solving the problems of inverter ventilation and thermal insulation, with significant energy-saving and consumption-reducing effects, and has great promotion value and application prospects.

[0046] The technical features of the above embodiments may be arbitrarily combined (as long as there is no contradiction in the combination of these technical features). To make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

Claims

1. A frequency converter heat preservation and heat dissipation device, comprising a frequency converter cabinet (1), wherein the lower end side of the frequency converter cabinet (1) has an air inlet (2), the upper end surface of the frequency converter cabinet (1) has an air outlet (3), and a turbine heat dissipation fan (4) is installed in the air outlet (3), characterized in that: An air guide box (5) is installed on the upper end surface of the frequency converter cabinet (1), and the air guide box (5) is arranged to cover the periphery of the air outlet (3). An exhaust pipe (6) is installed on the upper side of the air guide box (5), and the exhaust port of the exhaust pipe (6) is connected to the outside through an axial flow fan (7); The axial flow fan (7) is installed in a pre-installed hole in the wall, and the air outlet of the axial flow fan (7) extends to the outside of the wall and is covered with a shutter (8); An air supply port is provided on the outer wall of the lower end of the air guide box (5), and a baffle (12) for adjusting the size of the opening is installed at the air supply port.

2. The inverter heat preservation and heat dissipation device according to claim 1, characterized in that: The invention also comprises a motor (13) for driving the blades of the venetian blind (8) to flip, the motor (13) being mounted on a side of the wall located indoors, a winding wheel extending to the outdoors being mounted on the output shaft of the motor (13), the free end of the blade pull rope of the venetian blind (8) extending upwards and being wound around the winding wheel, and the motor (13) driving the winding wheel to rotate drives the blade pull rope to be retracted and extended.

3. The inverter heat preservation and heat dissipation device according to claim 2, characterized in that: It also includes a temperature sensor and a controller (14), wherein the temperature sensor is divided into an indoor temperature sensor and an outdoor temperature sensor and both are connected to the controller (14), and the indoor and outdoor temperatures are monitored by the controller (14); When the indoor temperature is higher than the set value, the axial flow fan (7) is driven by the controller (14) to operate to speed up the exhaust; When the outdoor temperature is lower than a set value, the controller (14) drives the motor (13) to operate so as to close the shutter (8) and open the baffle (12).

4. The inverter heat preservation and heat dissipation device according to claim 1, characterized in that: The baffle (12) can be opened outward or slid vertically to adjust the size of the air supply port.

5. The inverter heat preservation and heat dissipation device according to any one of claims 1 to 4, characterized in that: The upper end surface of the frequency converter cabinet (1) is provided with a plurality of groups of air outlets (3), and the plurality of groups of air outlets (3) are evenly distributed along the length direction of the frequency converter cabinet (1); a plurality of partitions (9) are installed inside the air guide box (5), and the plurality of partitions (9) are distributed in parallel along the length direction of the air guide box (5) to divide the inner cavity of the air guide box (5) into a plurality of air guide cavities, each of which corresponds to a group of air outlets (3) and is connected to an exhaust pipe (6).

6. The inverter heat preservation and heat dissipation device according to claim 5, characterized in that: At least one air supply port is arranged on the periphery of each air guide cavity.

7. The inverter heat preservation and heat dissipation device according to claim 5, characterized in that: A horizontally arranged air guide pipe (10) is installed in each air guide cavity, one end of the air guide pipe (10) horizontally extends toward the exhaust pipe (6) and penetrates the partition (9) along the way, and a baffle (11) that can be opened into the exhaust pipe (6) is hingedly installed at one end of the air guide pipe (10) close to the exhaust pipe (6).

8. The inverter heat preservation and heat dissipation device according to claim 7, characterized in that: One end of the exhaust pipe (6) connected to the air guide box (5) has a sleeve hole that matches the air guide pipe (10), and the partition plate (9) is provided with an assembly hole that matches the air guide pipe (10). The outer wall of the air guide pipe (10) is sealed and connected to the sleeve hole and the inner wall of the assembly hole respectively.

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