Frequency Converter

Abstract

The present disclosure provides a frequency converter, which relates to the field of electrical engineering. The frequency converter includes: a housing, a frequency conversion module, a first fan, a second fan, a filter, a dust collector, a first air inlet pipe, a second air inlet pipe, a first exhaust pipe and a second exhaust pipe; an air inlet nozzle is arranged at one end of the first air inlet pipe, and the air inlet nozzle is arranged below the frequency conversion module, the other end of the first air inlet pipe is connected to one end of the first fan, the other end of the first fan is connected to one end of the second air inlet pipe, and the other end of the second air inlet pipe is connected to the filter; the first fan is used to suck the filtered air into the first air inlet pipe through the second air inlet pipe, and the air flows to the frequency conversion module through the air inlet nozzle. By increasing the air flow rate around the frequency conversion module, the frequency conversion module is cooled and cooled, and the flowing air can also remove dust on the frequency conversion module, improve the heat dissipation efficiency of the frequency conversion module itself, and prevent the frequency converter from malfunctioning due to excessive temperature.

Description

Technical Field

[0001] The present disclosure relates to the field of electrical engineering, and in particular to a frequency converter. Background Art

[0002] During the development of heavy oil wells in oil fields, lifting equipment is needed to extract the crude oil from the heavy oil wells. Among them, the lifting equipment will use a large number of frequency converters. By controlling the voltage and frequency of the lifting equipment with frequency converters, good energy-saving effects can be achieved.

[0003] At present, the inverter includes a housing and a frequency conversion module, and the frequency conversion module is arranged in the housing. Among them, a heat dissipation duct is arranged on the housing, and the heat dissipation duct is adjacent to the frequency conversion module. When the frequency conversion module is working, heat is generated, and the outside air enters the housing through the heat dissipation duct to cool the frequency conversion module. However, the outdoor environment of oil field development is harsh, and dust and various flocculents and other dirt are often deposited on the frequency conversion module and the heat dissipation duct. The dirt not only affects the heat dissipation of the frequency conversion module, but also blocks the heat dissipation duct, affecting the air entering the housing, causing the internal temperature of the inverter to be too high, affecting the service life of the inverter, and increasing the frequency of inverter failure. Summary of the invention

[0004] The embodiment of the present disclosure provides a frequency converter for solving the problem of low heat dissipation efficiency of the frequency converter caused by dirt deposition on the frequency converter. The technical solution is as follows:

[0005] The present disclosure provides a frequency converter, the frequency converter comprising: a housing, a frequency conversion module, a first fan, a second fan, a filter, a dust collector, a first air inlet pipe, a second air inlet pipe, a first air exhaust pipe, and a second air exhaust pipe;

[0006] The first air inlet duct, the first fan, the frequency conversion module, the second fan and the first air exhaust duct are arranged in the housing;

[0007] An air inlet nozzle is arranged at one end of the first air inlet pipe, and the air inlet nozzle is arranged below the frequency conversion module, the other end of the first air inlet pipe is connected to one end of the first fan, the other end of the first fan is connected to one end of the second air inlet pipe, and the other end of the second air inlet pipe is connected to the filter;

[0008] A first air outlet is provided at one end of the first exhaust duct, and the first air outlet is provided above the frequency conversion module, the other end of the first exhaust duct is connected to one end of the second fan, the other end of the second fan is connected to one end of the second exhaust duct, the other end of the second exhaust duct is downwardly connected to the dust collector, the other end of the second exhaust duct is upwardly provided with a second air outlet, a shield is provided on the second air outlet, and the shield is used to prevent rainwater from entering the housing through the second air outlet;

[0009] The filter is used to filter the air outside the housing;

[0010] The first fan is used to suck the filtered air into the first air inlet pipe through the second air inlet pipe, and flow the air to the frequency conversion module through the air inlet nozzle;

[0011] The frequency conversion module is used to change the voltage value and frequency value of the output voltage of the inverter;

[0012] The second fan is used to suck the air and dust in the shell into the first exhaust duct through the first air outlet, collect the dust into the dust collector through the second exhaust duct, and exhaust the air from the shell through the second air outlet.

[0013] In the disclosed embodiment, the first fan directs filtered air to the frequency conversion module through an air inlet nozzle, thereby increasing the air flow rate around the frequency conversion module to cool the frequency conversion module. At the same time, the flowing air can also remove dust on the frequency conversion module, thereby improving the heat dissipation efficiency of the frequency conversion module itself, increasing the service life of the frequency converter, effectively preventing the frequency converter from malfunctioning due to overtemperature, and reducing the frequency of frequency converter failure.

[0014] In another possible implementation, the frequency conversion module includes a rectifier inverter module, a thermal conductive adhesive and a heat dissipation module;

[0015] The rectifier and inverter module, the thermally conductive adhesive and the heat dissipation module are arranged in the housing; the rectifier and inverter module are connected to the heat dissipation module through the thermally conductive adhesive;

[0016] The frequency converter further comprises a three-way air inlet pipe, and the air inlet nozzle comprises a first air inlet nozzle and a second air inlet nozzle;

[0017] One end of the three-way air inlet pipe is connected to the first air inlet nozzle and the second air inlet nozzle respectively, and the other end of the three-way air inlet pipe is connected to the first air inlet pipe;

[0018] The first air inlet nozzle is arranged below the rectifier inverter module, and the second air inlet nozzle is arranged below the heat dissipation module;

[0019] The first air inlet nozzle is used to direct the air in the first air inlet pipe to flow to the rectifier inverter module;

[0020] The second air inlet nozzle is used to direct the air in the first air inlet pipe to flow toward the heat dissipation module.

[0021] In the embodiment of the present disclosure, the first air inlet nozzle is arranged below the rectifier inverter module, and the second air inlet nozzle is arranged below the heat dissipation module; the first air inlet nozzle is used to direct the air in the first air inlet duct to the rectifier inverter module; the second air inlet nozzle is used to direct the air in the first air inlet duct to the heat dissipation module. The first air inlet nozzle and the second air inlet nozzle are used to cool down the rectifier inverter module and the heat dissipation module respectively, which can further improve the heat dissipation efficiency of the inverter.

[0022] In another possible implementation, the filter includes a dust filter and a dryer;

[0023] The dust filter is connected to one end of the dryer, and the other end of the dryer is connected to one end of the second air inlet pipe.

[0024] In the disclosed embodiment, the air outside the shell is filtered through a dust filter and a dryer, so that the air entering the second air inlet duct is dry and clean air, thereby making the air inside the shell dry and clean, effectively preventing water vapor and dust from damaging the frequency conversion module and other components in the shell, improving the heat dissipation efficiency of the frequency conversion module, increasing the service life of the frequency converter, and reducing the frequency of frequency converter failures.

[0025] In another possible implementation, the mask includes a mask top, a mask bottom, and a mask surface;

[0026] The bottom end of the cover surface is connected to the cover bottom, and the top end of the cover surface is connected to the cover top;

[0027] The cover bottom is provided with an air outlet, and the cover surface is provided with an air outlet hole;

[0028] The air outlet is connected to the second air outlet nozzle, and is used for the second air outlet nozzle to discharge the air into the mask;

[0029] The cover top is used to prevent rainwater from entering the housing through the second air outlet nozzle;

[0030] The air outlet is used to discharge the air out of the cover.

[0031] In another possible implementation, the frequency converter further includes a controller;

[0032] The controller is arranged in the housing; the controller is connected to the first fan and the second fan respectively;

[0033] The controller is used to control the opening or closing of the first fan and the second fan.

[0034] In another possible implementation, the frequency converter further includes a temperature sensor;

[0035] The temperature sensor is arranged on the frequency conversion module, and the temperature sensor is connected to the controller;

[0036] The temperature sensor is used to detect the temperature of the frequency conversion module and send the temperature to the controller;

[0037] The controller is further used to control the first fan and the second fan to be turned on or off according to the temperature.

[0038] In the embodiment of the present disclosure, the temperature of the frequency conversion module is detected by a temperature sensor, and the controller controls the opening or closing of the first fan and the second fan according to the temperature. The frequency conversion module can be cooled down in time when the temperature of the frequency conversion module is high, and the first fan and the second fan can be closed when the temperature of the frequency conversion module is low, thereby reducing energy consumption.

[0039] In another possible implementation, the frequency converter further includes a dust sensor;

[0040] The dust sensor is arranged in the housing, and the dust sensor is connected to the controller;

[0041] The dust sensor is used to detect the dust concentration in the housing and send the dust concentration to the controller;

[0042] The controller is further used to control the opening or closing of the first fan and the second fan according to the dust concentration.

[0043] In the embodiment of the present disclosure, the dust concentration in the shell is detected by a dust sensor, and the controller controls the opening or closing of the first fan and the second fan according to the dust concentration. When the dust concentration in the shell is high, the filtered air can enter the shell in time, and when the dust concentration in the shell is low, the first fan and the second fan can be closed to reduce energy consumption.

[0044] In another possible implementation, the frequency converter further includes a humidity sensor;

[0045] The humidity sensor is arranged in the housing, and the humidity sensor is connected to the controller;

[0046] The humidity sensor is used to detect the humidity in the housing and send the humidity to the controller;

[0047] The controller is further used to control the first fan and the second fan to be turned on or off according to the humidity.

[0048] In the embodiment of the present disclosure, the humidity inside the shell is detected by a humidity sensor, and the controller controls the opening or closing of the first fan and the second fan according to the humidity. When the humidity inside the shell is high, dry clean air can be introduced in time, and when the humidity inside the shell is low, the first fan and the second fan can be closed to reduce energy consumption.

[0049] In another possible implementation, the frequency converter further includes a timer;

[0050] The timer is arranged in the housing; the timer is connected to the first fan and the second fan respectively;

[0051] The timer is used to control the opening or closing of the first fan and the second fan.

[0052] In the embodiment of the present disclosure, the first fan and the second fan are turned on or off by controlling the timer controller, and different on and off times can be set according to different external environments of the inverter; while ensuring that the inverter is cooled, the energy consumption of the inverter is reduced.

[0053] In another possible implementation, the frequency converter further includes a bracket;

[0054] The bracket is used to support and fix the first air inlet pipe and the first air exhaust pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0056] Figure 1 is a structural schematic diagram of a frequency converter provided according to an embodiment of the present disclosure;

[0057] Figure 2 is a structural schematic diagram of a frequency conversion module provided according to an embodiment of the present disclosure;

[0058] Figure 3 It is a structural schematic diagram of a mask provided according to an embodiment of the present disclosure.

[0059] 1 Housing

[0060] 2 Frequency conversion module

[0061] 21. Rectifier and inverter module

[0062] 22 Thermally conductive adhesive

[0063] 23. Heat dissipation module

[0064] 24 Temperature Sensor

[0065] 3. First fan

[0066] 4 Second fan

[0067] 5 Filters

[0068] 6 Dust collector

[0069] 7 Mask

[0070] 71 Top

[0071] 72 bottom cover

[0072] 73 Cover

[0073] 74 Air outlet

[0074] 75 air outlet

[0075] 8 First air inlet pipe

[0076] 81 Air Inlet

[0077] 9 Second air inlet pipe

[0078] 10 First exhaust duct

[0079] 101 First air outlet

[0080] 11 Second exhaust duct

[0081] 111 Second air outlet DETAILED DESCRIPTION

[0082] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0083] Figure 1 1 is a schematic diagram of the structure of a frequency converter provided by an embodiment of the present disclosure. The frequency converter comprises: a housing 1, a frequency conversion module 2, a first fan 3, a second fan 4, a filter 5, a dust collector 6, a first air inlet duct 8, a second air inlet duct 9, a first air exhaust duct 10 and a second air exhaust duct 11;

[0084] The first air inlet duct 8, the first fan 3, the frequency conversion module 2, the second fan 4 and the first air exhaust duct 10 are arranged in the housing 1;

[0085] An air inlet nozzle 81 is provided at one end of the first air inlet pipe 8, and the air inlet nozzle 81 is provided below the frequency conversion module 2, the other end of the first air inlet pipe 8 is connected to one end of the first fan 3, the other end of the first fan 3 is connected to one end of the second air inlet pipe 9, and the other end of the second air inlet pipe 9 is connected to the filter 5;

[0086] A first air outlet 101 is arranged at one end of the first air exhaust duct 10, and the first air outlet 101 is arranged above the frequency conversion module 2, the other end of the first air exhaust duct 10 is connected to one end of the second fan 4, the other end of the second fan 4 is connected to one end of the second air exhaust duct 11, the other end of the second air exhaust duct 11 is downwardly connected to the dust collector 6, the other end of the second air exhaust duct 11 is upwardly arranged with a second air outlet 111, and a mask 7 is arranged on the second air outlet 111, and the mask 7 is used to prevent rainwater from entering the housing 1 through the second air outlet 111;

[0087] A filter 5, used for filtering the air outside the housing 1;

[0088] The first fan 3 is used to suck the filtered air into the first air inlet pipe 8 through the second air inlet pipe 9, and let the air flow to the frequency conversion module 2 through the air inlet nozzle 81;

[0089] The frequency conversion module 2 is used to change the voltage value and frequency value of the inverter output voltage;

[0090] The second fan 4 is used for sucking the air and dust in the shell 1 into the first exhaust duct 10 through the first air outlet nozzle 101, collecting the dust into the dust collector 6 through the second exhaust duct 11, and exhausting the air from the shell 1 through the second air outlet nozzle 111.

[0091] In the disclosed embodiment, the first fan 3 directs the filtered air to the frequency conversion module 2 through the air inlet nozzle 81, thereby increasing the air flow rate around the frequency conversion module 2 to cool the frequency conversion module 2. At the same time, the flowing air can also remove dust on the frequency conversion module 2, thereby improving the heat dissipation efficiency of the frequency conversion module 2 itself, increasing the service life of the frequency converter, effectively preventing the frequency converter from malfunctioning due to excessive temperature, and reducing the frequency of frequency converter malfunctions.

[0092] It should be noted that the frequency converter can be used in the lifting equipment during the development of heavy oil wells; the frequency converter can control the power of the lifting equipment by outputting the voltage and frequency of the power supply, so that the power of the lifting equipment matches the actual load of the heavy oil well, thereby saving energy consumption. Moreover, the frequency converter effectively improves the heat dissipation efficiency of the frequency conversion module 2 itself, prevents the frequency converter from malfunctioning due to excessive temperature, and reduces the frequency of malfunction of the frequency converter due to excessive temperature, thereby being able to improve the time rate of the oil well.

[0093] Introduction to the housing 1: The first air inlet duct 8, the first fan 3, the frequency conversion module 2, the second fan 4 and the first exhaust duct 10 are arranged in the housing 1, and the housing 1 protects the components in the housing 1. When the inverter is operated in a harsh outdoor environment, the housing 1 can protect against wind and rain. Among them, the material of the housing 1 can be metal, such as iron, aluminum, etc.; it can also be a metal alloy, such as aluminum alloy; in the present disclosed embodiment, the material of the housing 1 is not specifically limited, and can be set and changed as needed.

[0094] The shape of the shell 1 can be a cube or a cuboid; for example, the shape of the shell 1 is a cuboid, and the length of the cuboid can be 1.5m, 2m, or 2.5m; the width of the cuboid can be 0.4m, 0.5m, or 0.6m; the height of the cuboid can be 1.5m, 1.8m, or 2m; in the disclosed embodiment, the shape and size of the shell 1 are not specifically limited and can be set and changed as needed. For example, the shape of the shell 1 is a cuboid, and the length of the shell 1 is 2m, the width is 0.6m, and the height is 1.8m.

[0095] Introduction to frequency conversion module 2: Frequency conversion module 2 is used to change the voltage value and frequency value of the inverter output voltage. The input voltage of the inverter can be a low-voltage AC voltage, such as 220V, 50Hz; it can also be a high-voltage AC voltage, such as 6kV, 50Hz; the inverter can convert the input AC voltage into a DC voltage through the frequency conversion module 2, and output it after converting the DC voltage into an AC voltage.

[0096] In one possible implementation, see Figure 2 The frequency conversion module 2 includes a rectifier inverter module 21, a thermally conductive adhesive 22 and a heat dissipation module 23; the rectifier inverter module 21, the thermally conductive adhesive 22 and the heat dissipation module 23 are arranged in the housing 1; the rectifier inverter module 21 and the heat dissipation module 23 are connected through the thermally conductive adhesive 22;

[0097] The inverter also includes a three-way air inlet duct, and the air inlet nozzle 81 includes a first air inlet nozzle and a second air inlet nozzle; one end of the three-way air inlet duct is respectively connected to the first air inlet nozzle and the second air inlet nozzle, and the other end of the three-way air inlet duct is connected to the first air inlet duct 8; the first air inlet nozzle is arranged below the rectifier inverter module 21, and the second air inlet nozzle is arranged below the heat dissipation module 23; the first air inlet nozzle is used to direct the air in the first air inlet duct 8 to the rectifier inverter module 21; the second air inlet nozzle is used to direct the air in the first air inlet duct 8 to the heat dissipation module 23.

[0098] Among them, the rectifier inverter module 21 is used to change the voltage value and frequency value of the inverter input voltage; and the rectifier inverter module 21 will generate heat during operation. In a possible implementation, the rectifier inverter module 21 includes a rectifier and an inverter, and the rectifier and the inverter are connected; wherein the rectifier can convert AC into DC; the rectifier can be made of a vacuum tube, an ignition tube, a solid silicon semiconductor diode, and a mercury arc. Among them, the inverter can convert the DC converted by the rectifier into AC; the AC can be a fixed frequency and constant voltage AC, such as an output voltage of 220V, 50Hz; or it can be a variable frequency and variable voltage AC, such as an output voltage of 380-650V, an output frequency of 0-400Hz, and an output power of 0.75-400kW.

[0099] The thermal conductive adhesive 22 can transfer the heat generated by the rectifier inverter module 21 to the heat dissipation module 23. In a possible implementation, the thermal conductive adhesive 22 can be a silicone thermal conductive adhesive 22; the thermal conductive adhesive 22 has excellent high and low temperature resistance, short-term high temperature resistance of 300 degrees, long-term high temperature resistance of 280 degrees, and low temperature resistance of minus 60 degrees; and also has excellent thermal conductivity, and the thermal conductivity coefficient after curing is 1.1-1.5W / (m·k). In addition, the silicone thermal conductive adhesive 22 has good adhesion to most metal and non-metal materials.

[0100] The heat dissipation module 23 is used to dissipate the heat generated by the rectifier inverter module 21. In a possible implementation, the heat dissipation module 23 is a heat sink, and the material of the heat sink can be metal, such as copper, aluminum; or metal alloy, such as aluminum alloy. The heat sink is fixed behind the rectifier inverter module 21 through the thermal conductive adhesive 22. When the inverter is working normally, the rectifier inverter module 21 generates heat and the temperature rises. A part of the heat generated by the rectifier inverter module 21 is transferred to the heat dissipation module 23 through the thermal conductive adhesive 22, and the temperature of the rectifier inverter module 21 rises.

[0101] In a possible implementation, the first air inlet nozzle is arranged below the rectifier inverter module 21, and the second air inlet nozzle is arranged below the heat dissipation module 23; the first air inlet nozzle is used to direct the air in the first air inlet pipe to the rectifier inverter module 21; the second air inlet nozzle is used to direct the air in the first air inlet pipe 8 to the heat dissipation module 23. The first air inlet nozzle is aimed at the rectifier inverter module 21 to blow air and dust from bottom to top, and the second air inlet nozzle is aimed at the heat dissipation module 23 behind the rectifier inverter module 21 to blow air and dust from bottom to top, and the dust and flocs on the rectifier inverter module 21 and the heat dissipation module 23 enter the first air outlet nozzle 101 above the rectifier inverter module 21 and the heat dissipation module 23 along with the airflow and are discharged outside the housing 1.

[0102] In the embodiment of the present disclosure, the first air inlet nozzle is arranged below the rectifier inverter module 21, and the second air inlet nozzle is arranged below the heat dissipation module 23; the first air inlet nozzle and the second air inlet nozzle are used to cool the rectifier inverter module 21 and the heat dissipation module 23 respectively, which can further improve the heat dissipation efficiency of the inverter.

[0103] Introduction to filter 5: Filter 5 is used to filter the air outside housing 1. And, the filter 5 is used to filter moisture and / or dust in the air. When the filter 5 is used to filter moisture in the air, the filter 5 is a dryer; when the filter 5 is used to filter dust in the air, the filter 5 is a dust filter. When the filter 5 is used to filter moisture and dust in the air, in a possible implementation, the filter 5 includes a dust filter and a dryer; the dust filter is connected to one end of the dryer, and the other end of the dryer is connected to one end of the second air inlet pipe 9.

[0104] The dust filter may be a coarse filter 5 made of non-woven fabric, metal mesh, glass fiber, nylon mesh, etc., a medium filter 5 made of foam plastic, glass fiber, etc., or a high efficiency filter 5 made of ultra-fine glass fiber filter paper, etc. In the disclosed embodiment, the model of the dust filter is not specifically limited and can be set and changed as needed. For example, the dust filter is set to be a coarse filter 5 made of non-woven fabric, metal mesh, glass fiber, nylon mesh, etc.

[0105] The dryer can be an adsorption dryer or a refrigeration dryer. The adsorption dryer uses the principle of pressure swing adsorption. When wet air passes through the adsorbent, the water is adsorbed to obtain dry air. The refrigeration dryer uses the principle of cooling the air and lowering the air temperature. The water in the wet air is condensed and then separated from the air to obtain dry air. In the embodiment of the present disclosure, the type of dryer is not specifically limited and can be set and changed as needed. For example, the dryer is set to be an adsorption dryer.

[0106] In the disclosed embodiment, the air outside the shell 1 is filtered through a dust filter and a dryer, so that the air entering the second air inlet pipe 9 is dry and clean air, thereby making the air inside the shell 1 dry and clean, effectively preventing water vapor and dust from damaging the frequency conversion module 2 and other components in the shell 1, thereby improving the heat dissipation efficiency of the frequency conversion module 2, increasing the service life of the inverter, and reducing the frequency of inverter failures.

[0107] Introduction of the first fan 3 and the second fan 4: The first fan 3 is used to suck the filtered air into the first air inlet duct 8 through the second air inlet duct 9, and let the air flow to the frequency conversion module 2 through the air inlet nozzle 81; the second fan 4 is used to suck the air and dust in the shell 1 into the first exhaust duct 10 through the first air outlet nozzle 101, collect the dust into the dust collector 6 through the second exhaust duct 11, and exhaust the air from the shell 1 through the second air outlet nozzle 111.

[0108] Among them, the first fan 3 and the second fan 4 can be duct fans, such as circular duct fans. The casing of the circular duct fan is cylindrical, and it is an ideal ventilator that perfectly combines performance and appearance; it has the characteristics of easy installation, light weight, and low noise. Rotatable blades are arranged in the duct fan, and the number of blades can be 3, 4, or 5; in the embodiment of the present disclosure, the number of blades in the duct fan is not specifically limited, and can be set and changed as needed. The duct fan uses high-speed rotating blades to exert pressure on the gas, thereby achieving the purpose of conveying gas.

[0109] Introduction to the first air inlet duct 8, the second air inlet duct 9, the first exhaust duct 10 and the second exhaust duct 11: The materials of the first air inlet duct 8, the second air inlet duct 9, the first exhaust duct 10 and the second exhaust duct 11 can be metal materials, such as copper, iron, aluminum; they can also be metal alloys, such as aluminum alloys; they can also be polymer materials, such as engineering plastics. The diameters of the first air inlet duct 8, the second air inlet duct 9, the first exhaust duct 10 and the second exhaust duct 11 can be the same or different. For example, the diameters of the first air inlet duct 8, the second air inlet duct 9, the first exhaust duct 10 and the second exhaust duct 11 are the same, and the diameters can be 10 cm, 15 cm, or 20 cm. In the disclosed embodiment, the materials and sizes of the first air inlet duct 8, the second air inlet duct 9, the first exhaust duct 10 and the second exhaust duct 11 are not specifically limited and can be set and changed as needed.

[0110] In one possible implementation, an air inlet nozzle 81 is set at one end of the first air inlet duct 8, and the air inlet nozzle 81 is set below the frequency conversion module 2, the other end of the first air inlet duct 8 is connected to one end of the first fan 3, and the other end of the first fan 3 is connected to one end of the second air inlet duct 9; a first air outlet nozzle 101 is set at one end of the first exhaust duct 10, and the first air outlet nozzle 101 is set above the frequency conversion module 2, and the other end of the first exhaust duct 10 is connected to one end of the second fan 4.

[0111] The air inlet nozzle 81 may be in the shape of a circular funnel, a square funnel, or a flat elliptical funnel. The air inlet nozzle 81 is disposed below the frequency conversion module 2 and connected to the first air inlet pipe 8, so that the air in the first air inlet pipe 8 can flow directly to the frequency conversion module 2.

[0112] The shape of the first air outlet 101 can be the same as or different from that of the air inlet 81; the shape of the first air outlet 101 can be a circular funnel, a square funnel, or a flat elliptical funnel. The first air outlet 101 is arranged above the frequency conversion module 2 and connected to the first exhaust duct 10. The first air outlet 101 can directly suck the hot air and dust above the frequency conversion module 2 into the first exhaust duct 10 and discharge them outside the housing 1 through the second fan 4.

[0113] In one possible implementation, the other end of the second fan 4 is connected to one end of the second exhaust duct 11, the other end of the second exhaust duct 11 is connected downwardly to the dust collector 6, and the other end of the second exhaust duct 11 is upwardly provided with a second air outlet nozzle 111. In another possible implementation, the other end of the second exhaust duct 11 is connected to one end of the three-way air outlet duct; the other end of the three-way air outlet duct is upwardly connected to the second air outlet nozzle 111, and the other end of the three-way air outlet duct is downwardly connected to the dust collector 6. The air and dust in the second exhaust duct 11 are discharged from the housing 1 through the second air outlet nozzle 111, and the dust that cannot be discharged falls into the dust collector 6 below the three-way air outlet duct.

[0114] The material of the dust collector 6 can be a metal material, such as copper, iron, aluminum; it can also be a metal alloy, such as aluminum alloy; it can also be a polymer material, such as engineering plastics. The box of the dust collector 6 can be a cylinder, a cuboid, or a cube. The size of the dust collector 6 can be the same as or different from the size of the second exhaust duct 11. In the embodiment of the present disclosure, the material, shape, and size of the dust collector 6 are not specifically limited and can be set and changed as needed. For example, when the diameter of the second exhaust duct 11 is 15 cm, the diameter of the dust collector 6 can be set to 20 cm.

[0115] In a possible implementation, the dust collector 6 and the second exhaust duct 11 may be connected via a thread sleeve, so that the dust collector 6 can be cleaned regularly.

[0116] Among them, a mask 7 is provided on the second air outlet 111, and the mask 7 is used to prevent rainwater from entering the shell 1 through the second air outlet 111. The material of the mask 7 can be a metal material, such as copper, iron, and aluminum; it can also be a metal alloy, such as an aluminum alloy; it can also be a polymer material, such as engineering plastics. The shape of the mask 7 can be a cylinder, a rectangular parallelepiped, or a funnel. The size of the mask 7 can be the same as that of the second air outlet 111, or it can be different. In the embodiment of the present disclosure, the material, shape, and size of the mask 7 are not specifically limited, and can be set and changed as needed.

[0117] In one possible implementation, see Figure 3The cover 7 includes a cover top 71, a cover bottom 72 and a cover surface 73; the bottom end of the cover surface 73 is connected to the cover bottom 72, and the top end of the cover surface 73 is connected to the cover top 71; an air outlet 74 is provided on the cover bottom 72, and an air outlet hole 75 is provided on the cover surface 73; the air outlet 74 is connected to the second air outlet nozzle 111, and the second air outlet nozzle 111 is used to discharge air into the cover 7; the cover top 71 is used to prevent rainwater from entering the shell 1 through the second air outlet nozzle 111; the air outlet hole 75 is used to discharge air out of the cover 7.

[0118] The air outlet 74 and the second air outlet nozzle 111 have the same size; the air outlet 74 and the second air outlet nozzle 111 can be connected by welding or by bolts. The shape of the cover top 71 can be circular, square, or funnel-shaped. In the embodiment of the present disclosure, the shape of the cover top 71 is not specifically limited and can be set and changed as needed.

[0119] Among them, the air outlet holes 75 are arranged on the cover surface 73, and the shape of the air outlet holes 75 can be circular, square, or rhombus; the number of the air outlet holes 75 can be 15, 30, or 60, and the size of the air outlet holes 75 can be 1 cm, 2 cm, or 3 cm; the air outlet holes 75 can be evenly distributed on the cover surface 73, or unevenly distributed on the cover surface 73. In the embodiment of the present disclosure, the shape, size, number, and distribution of the air outlet holes 75 are not specifically limited, and can be set and changed as needed.

[0120] In another possible implementation, the frequency converter further includes a bracket, which is used to support and fix the first air inlet duct 8 and the first air exhaust duct 10. The bracket may be a U-shaped bracket, in which the first air inlet duct 8 and the first air exhaust duct 10 are arranged, and the U-shaped bracket is fixedly connected to the housing 1 by screws, and the air inlet duct and the first air exhaust duct 10 are fixed and supported by fixing the U-shaped bracket.

[0121] In another possible implementation, the frequency converter further includes a controller; the controller is disposed in the housing 1; the controller is connected to the first fan 3 and the second fan 4 respectively; the controller is used to control the opening or closing of the first fan 3 and the second fan 4. The controller can be fixed to the housing 1 by screws; in another possible implementation, a fixing bracket is disposed in the housing 1, and the controller is fixed to the fixing bracket by screws.

[0122] In a possible implementation, the frequency converter also includes a temperature sensor 24; the temperature sensor 24 is arranged on the frequency conversion module 2, and the temperature sensor 24 is connected to the controller; the temperature sensor 24 is used to detect the temperature of the frequency conversion module 2 and send the temperature to the controller; the controller is also used to control the opening or closing of the first fan 3 and the second fan 4 according to the temperature.

[0123] The temperature sensor 24 can be fixed on the frequency conversion module 2 by the heat conductive adhesive 22, and can directly detect the temperature of the frequency conversion module 2 and send the temperature to the controller. The first temperature threshold and the second temperature threshold can be set on the controller. When the temperature detected by the temperature sensor 24 is greater than the first temperature threshold, the controller controls the first fan 3 and the second fan 4 to be turned on; when the temperature detected by the temperature sensor 24 is less than the second temperature threshold, the controller controls the first fan 3 and the second fan 4 to be turned off.

[0124] Among them, the first temperature threshold can be 50°C, 55°C, or 60°C; the second temperature threshold can be 35°C, 40°C, or 45°C; in the disclosed embodiment, the values ​​of the first temperature threshold and the second temperature threshold are not specifically limited and can be set and changed as needed. For example, the first temperature threshold is set to 50°C, and the second temperature threshold is set to 40°C. When the temperature detected by the temperature sensor 24 is greater than 50°C, the controller controls the opening of the first fan 3 and the second fan 4; at this time, the filtered air flows to the frequency conversion module 2 through the air inlet nozzle 81, and the frequency conversion module 2 is cooled by increasing the air flow rate around the frequency conversion module 2; when the temperature detected by the temperature sensor 24 is less than 40°C, the controller controls the closing of the first fan 3 and the second fan 4.

[0125] In the embodiment of the present disclosure, the temperature of the frequency conversion module 2 is detected by the temperature sensor 24, and the controller controls the opening or closing of the first fan 3 and the second fan 4 according to the temperature. The frequency conversion module 2 can be cooled down in time when the temperature of the frequency conversion module 2 is high, and the first fan 3 and the second fan 4 can be closed when the temperature of the frequency conversion module 2 is low, thereby reducing energy consumption.

[0126] In another possible implementation, the frequency converter also includes a dust sensor; the dust sensor is arranged in the shell 1, and the dust sensor is connected to the controller; the dust sensor is used to detect the dust concentration in the shell 1 and send the dust concentration to the controller; the controller is also used to control the opening or closing of the first fan 3 and the second fan 4 according to the dust concentration.

[0127] The dust sensor can be fixed to the housing 1 by screws; in another possible manner, a fixing bracket is provided in the housing 1, and the dust sensor is fixed to the fixing bracket by screws. The dust sensor can detect the dust concentration in the housing 1 and send the dust concentration to the controller. The first concentration threshold and the second concentration threshold can be set on the controller. When the dust concentration detected by the dust sensor is greater than the first concentration threshold, the controller controls the first fan 3 and the second fan 4 to be turned on; when the dust concentration detected by the dust sensor is less than the second concentration threshold, the controller controls the first fan 3 and the second fan 4 to be turned off.

[0128] The first concentration threshold may be 30 mg / m 3 , or 35 mg / m 3 , or 40 mg / m 3 The second concentration threshold may be 5 mg / m 3 , or 10 mg / m 3 , or 15 mg / m 3 In the present embodiment, the values ​​of the first concentration threshold and the second concentration threshold are not specifically limited and can be set and changed as needed. For example, the first concentration threshold is set to 30 mg / m 3 , set the second concentration threshold to 10 mg / m 3 When the dust sensor detects a concentration greater than 30 mg / m 3 When the first fan 3 and the second fan 4 are turned on, the controller controls the first fan 3 and the second fan 4 to be turned on. At this time, the filtered air flows to the frequency conversion module 2 through the air inlet nozzle 81, and the air and dust in the housing 1 are sucked into the first exhaust duct 10 by the second fan 4 and then discharged out of the housing 1. When the concentration detected by the dust sensor is less than 10mg / m 3 When the controller controls the first fan 3 and the second fan 4 to be turned off.

[0129] In the embodiment disclosed herein, the dust concentration in the shell 1 is detected by a dust sensor, and the controller controls the opening or closing of the first fan 3 and the second fan 4 according to the dust concentration. When the dust concentration in the shell 1 is high, the filtered air can be allowed to enter the shell 1 in time, and when the dust concentration in the shell 1 is low, the first fan 3 and the second fan 4 can be closed to reduce energy consumption.

[0130] In another possible implementation, the inverter also includes a humidity sensor; the humidity sensor is arranged in the shell 1, and the humidity sensor is connected to the controller; the humidity sensor is used to detect the humidity in the shell 1 and send the humidity to the controller; the controller is also used to control the opening or closing of the first fan 3 and the second fan 4 according to the humidity.

[0131] The humidity sensor can be fixed on the housing 1 by screws; in another possible manner, a fixing bracket is provided in the housing 1, and the humidity sensor is fixed on the fixing bracket by screws. The humidity sensor can detect the humidity in the housing 1 and send the humidity to the controller. The first humidity threshold and the second humidity threshold can be set on the controller. When the humidity detected by the humidity sensor is greater than the first humidity threshold, the controller controls the first fan 3 and the second fan 4 to be turned on; when the humidity detected by the humidity sensor is less than the second humidity threshold, the controller controls the first fan 3 and the second fan 4 to be turned off.

[0132] Among them, the first humidity threshold can be 65%, 70%, or 75%; the second humidity threshold can be 25%, 30%, or 35%; wherein the humidity value is the relative humidity value in the air. In the embodiment of the present disclosure, the values ​​of the first humidity threshold and the second humidity threshold are not specifically limited and can be set and changed as needed. For example, the first humidity threshold is set to 70%, and the second humidity threshold is set to 30%. When the humidity detected by the humidity sensor is greater than 70%, the controller controls the opening of the first fan 3 and the second fan 4; at this time, the filtered dry air flows to the frequency conversion module 2 through the air inlet nozzle 81, and the air and dust in the shell 1 are sucked into the first exhaust duct 10 by the second fan 4 and then discharged outside the shell 1; when the humidity detected by the humidity sensor is less than 30%, the controller controls the closing of the first fan 3 and the second fan 4.

[0133] In the embodiment of the present disclosure, the humidity in the shell 1 is detected by a humidity sensor, and the controller controls the opening or closing of the first fan 3 and the second fan 4 according to the humidity. When the humidity in the shell 1 is high, dry clean air can be introduced in time, and when the humidity in the shell 1 is low, the first fan 3 and the second fan 4 can be closed to reduce energy consumption.

[0134] In another possible implementation, the frequency converter further includes a timer; the timer is disposed in the housing 1; the timer is respectively connected to the first fan 3 and the second fan 4; the timer is used to control the first fan 3 and the second fan 4 to be turned on or off.

[0135] The timer can be fixed on the housing 1 by screws; in another possible manner, a fixing bracket is provided in the housing 1, and the timer is fixed on the fixing bracket by screws. The timer can set the opening time and closing time of the first fan 3 and the second fan 4, wherein the opening time can be 9:00 on Monday, or 9:00 every day, or 9:00 every Monday, Wednesday and Friday; the closing time can be 9:10 or 9:15 or 9:20 on Monday; it can also be 9:10 or 9:15 or 9:20 every day, or it can be 9:10 or 9:15 or 9:20 every Monday, Wednesday and Friday; in the embodiment of the present disclosure, the opening time and the closing time and the time interval between opening and closing are not specifically limited, and can be set and changed as needed. For example, the opening time is set to 9:00 on Monday and the closing time is set to 9:10 on Monday, then through the timer, the first fan 3 and the second fan 4 are turned on for 10 minutes every week, wherein the opening time and the closing time refer to the time in the 24-hour system.

[0136] In the embodiment of the present disclosure, the first fan 3 and the second fan 4 are turned on or off by controlling the timer controller, and different on and off times can be set according to different external environments of the inverter; while ensuring that the inverter is cooled, the energy consumption of the inverter is reduced.

[0137] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A frequency converter, characterized in that: The frequency converter comprises: a housing, a frequency conversion module, a first fan, a second fan, a filter, a dust collector, a first air inlet pipe, a second air inlet pipe, a first air exhaust pipe and a second air exhaust pipe; The first air inlet duct, the first fan, the frequency conversion module, the second fan and the first air exhaust duct are arranged in the housing; An air inlet nozzle is arranged at one end of the first air inlet pipe, and the air inlet nozzle is arranged below the frequency conversion module, the other end of the first air inlet pipe is connected to one end of the first fan, the other end of the first fan is connected to one end of the second air inlet pipe, and the other end of the second air inlet pipe is connected to the filter; A first air outlet is provided at one end of the first exhaust duct, and the first air outlet is provided above the frequency conversion module, the other end of the first exhaust duct is connected to one end of the second fan, the other end of the second fan is connected to one end of the second exhaust duct, the other end of the second exhaust duct is downwardly connected to the dust collector, the other end of the second exhaust duct is upwardly provided with a second air outlet, a shield is provided on the second air outlet, and the shield is used to prevent rainwater from entering the housing through the second air outlet; The filter is used to filter the air outside the housing; The first fan is used to suck the filtered air into the first air inlet pipe through the second air inlet pipe, and flow the air to the frequency conversion module through the air inlet nozzle; The frequency conversion module is used to change the voltage value and frequency value of the output voltage of the inverter; The second fan is used to suck the air and dust in the housing into the first exhaust pipe through the first air outlet, collect the dust into the dust collector through the second exhaust pipe, and exhaust the air out of the housing through the second air outlet; The frequency conversion module includes a rectifier inverter module, a thermal conductive adhesive and a heat dissipation module; The rectifier and inverter module, the thermally conductive adhesive and the heat dissipation module are arranged in the housing; the rectifier and inverter module are connected to the heat dissipation module through the thermally conductive adhesive; The frequency converter further comprises a three-way air inlet pipe, and the air inlet nozzle comprises a first air inlet nozzle and a second air inlet nozzle; One end of the three-way air inlet pipe is connected to the first air inlet nozzle and the second air inlet nozzle respectively, and the other end of the three-way air inlet pipe is connected to the first air inlet pipe; The first air inlet nozzle is arranged below the rectifier inverter module, and the second air inlet nozzle is arranged below the heat dissipation module; The first air inlet nozzle is used to direct the air in the first air inlet pipe to flow to the rectifier inverter module; The second air inlet nozzle is used to direct the air in the first air inlet pipe to flow toward the heat dissipation module.

2. The frequency converter according to claim 1, characterized in that: The filter includes a dust filter and a dryer; The dust filter is connected to one end of the dryer, and the other end of the dryer is connected to one end of the second air inlet pipe.

3. The frequency converter according to claim 1, characterized in that: The mask comprises a mask top, a mask bottom and a mask surface; The bottom end of the cover surface is connected to the cover bottom, and the top end of the cover surface is connected to the cover top; The cover bottom is provided with an air outlet, and the cover surface is provided with an air outlet hole; The air outlet is connected to the second air outlet nozzle, and is used for the second air outlet nozzle to discharge the air into the mask; The cover top is used to prevent rainwater from entering the housing through the second air outlet nozzle; The air outlet is used to discharge the air out of the cover.

4. The frequency converter according to claim 1, characterized in that: The frequency converter also includes a controller; The controller is arranged in the housing; the controller is connected to the first fan and the second fan respectively; The controller is used to control the opening or closing of the first fan and the second fan.

5. The frequency converter according to claim 1, characterized in that: The frequency converter also includes a temperature sensor; The temperature sensor is arranged on the frequency conversion module, and the temperature sensor is connected to the controller; The temperature sensor is used to detect the temperature of the frequency conversion module and send the temperature to the controller; The controller is further used to control the first fan and the second fan to be turned on or off according to the temperature.

6. The frequency converter according to claim 4 or 5, characterized in that: The frequency converter also includes a dust sensor; The dust sensor is arranged in the housing, and the dust sensor is connected to the controller; The dust sensor is used to detect the dust concentration in the housing and send the dust concentration to the controller; The controller is further used to control the opening or closing of the first fan and the second fan according to the dust concentration.

7. The frequency converter according to claim 4 or 5, characterized in that: The frequency converter also includes a humidity sensor; The humidity sensor is arranged in the housing, and the humidity sensor is connected to the controller; The humidity sensor is used to detect the humidity in the housing and send the humidity to the controller; The controller is further used to control the first fan and the second fan to be turned on or off according to the humidity.

8. The frequency converter according to claim 1, characterized in that: The frequency converter also includes a timer; The timer is arranged in the housing; the timer is connected to the first fan and the second fan respectively; The timer is used to control the opening or closing of the first fan and the second fan.

9. The frequency converter according to claim 1, characterized in that: The frequency converter also includes a bracket; The bracket is used to support and fix the first air inlet pipe and the first air exhaust pipe.

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