Cooling system, frequency converter cabinet and electrical equipment

Abstract

The present application relates to a heat dissipation system, a frequency conversion cabinet and electrical equipment, comprising a control module, a temperature detection module, a compressor module, a fan module and a refrigeration pipe, wherein the control module is connected to the temperature detection module, the compressor module and the fan module, the compressor module is connected to the refrigeration pipe to form a circulation loop, and the refrigeration pipe is arranged on the heat dissipation device; the compressor module is used to output refrigerant to the refrigeration pipe to dissipate heat for the heat dissipation device; the temperature detection module is used to detect the ambient temperature of the heat dissipation device; the control module is used to control the operating state of the fan module according to the ambient temperature and a preset temperature threshold, and control the output state of the refrigerant output by the compressor module, so as to improve the heat dissipation efficiency of the heat dissipation system while reducing energy consumption, and avoid problems such as accelerated aging of the frequency conversion cabinet and electrical equipment due to excessive heat generation and high temperature of power devices, resulting in reduced life or failure to operate normally.

Description

Technical Field

[0001] The present application relates to the technical field of heat dissipation equipment, and in particular to a heat dissipation system, a frequency conversion cabinet and electrical equipment. Background Art

[0002] In recent years, with the improvement of living standards, household appliances, from refrigerators and air conditioners to rice cookers and table lamps, have become an indispensable part of every family, but at the same time, the power consumption of electrical appliances cannot be ignored. In order to save energy, inverters that control AC motors by changing the frequency have been widely used and are an important device in electrical appliances to achieve speed control and energy saving.

[0003] However, when the inverter is working under high load for a long time, the power devices generate a lot of heat. If the heat is not effectively dissipated, the internal components of the inverter will age faster due to the high temperature, and the service life will be reduced. The common heat sink used in the existing inverter has a single internal heat dissipation method and there is a problem of uneven heat dissipation of the power devices of the inverter, resulting in low overall heat dissipation efficiency. Summary of the invention

[0004] Based on this, it is necessary to provide a heat dissipation system, a frequency conversion cabinet and electrical equipment to address the problem that the existing radiator has a single heat dissipation method and low heat dissipation efficiency.

[0005] A heat dissipation system, the system comprising: a control module, a temperature detection module, a compressor module, a fan module and a refrigeration pipe, the control module is connected to the temperature detection module, the compressor module and the fan module, the compressor module is connected to the refrigeration pipe to form a circulation loop, and the refrigeration pipe is arranged on the heat dissipation device;

[0006] The compressor module is used to output refrigerant to the refrigeration pipe to dissipate heat for the heat dissipation device;

[0007] The temperature detection module is used to detect the ambient temperature of the heat dissipation device;

[0008] The control module is used to control the operating state of the fan module according to the ambient temperature and the preset temperature threshold, and to control the output state of the refrigerant output by the compressor module, so as to achieve the purpose of regulating the heat dissipation efficiency of the heat dissipation system.

[0009] In one embodiment, the control module includes a preset temperature input circuit, a comparison control circuit and a compressor module adjustment circuit, the comparison control circuit is connected to the preset temperature input circuit, the temperature detection module, the compressor module adjustment circuit and the fan module, and the compressor module adjustment circuit is connected to the compressor module.

[0010] In one embodiment, the comparison control circuit includes a comparator, a resistor R3, a resistor R4, a switch tube and a control switch. The comparator's in-phase input end is connected to the temperature detection module, the inverting input end is connected to the preset temperature input circuit, the output end is connected to one end of the resistor R3, the other end of the resistor R3 is connected to the control end of the switch tube, and is also grounded through the resistor R4. The first end of the switch tube is grounded, and the second end of the switch tube is connected to an external power supply through the control part of the control switch. The controlled part of the control switch is connected in series to the compressor module adjustment circuit, and is also connected in series to the power supply circuit of the fan module.

[0011] In one embodiment, the compressor module regulation circuit includes a thermistor Rt3 and a resistor R5. After the thermistor Rt3 is connected in series with the resistor R5, one end of the thermistor Rt3 is connected to an external power supply through the controlled part of the control switch, and the other end is grounded through the electronic expansion valve of the compressor module.

[0012] In one embodiment, the refrigeration pipe includes an inlet, an outlet, a straight pipe section and a curved pipe section. The number of the straight pipe sections is more than two. The straight pipe sections are arranged in sequence on the heat dissipated device. The straight pipe sections are connected to the inlet and the outlet after being connected end to end with the corresponding curved pipe sections. The inlet and the outlet are also connected to the compressor module.

[0013] In one embodiment, each of the curved pipe sections is a capillary tube.

[0014] In one embodiment, the inlet and the outlet are both configured to be funnel-shaped, the ends of the inlet and the outlet with smaller cross-sections are both connected to the compressor module, and the ends of the inlet and the outlet with larger cross-sections are both correspondingly connected to the straight pipe section.

[0015] In one of the embodiments, fin structures are evenly arranged in each of the straight tube sections.

[0016] In one of the embodiments, a frequency converter cabinet is provided, comprising the above-mentioned heat dissipation system, wherein the heat dissipation system is used to dissipate heat for heat-dissipated components in the frequency converter cabinet.

[0017] In one embodiment, an electrical device is provided, including the above-mentioned frequency conversion cabinet.

[0018] In the above-mentioned heat dissipation system, frequency conversion cabinet and electrical equipment, the control module makes a judgment based on the preset temperature threshold and the detected ambient temperature value of the heat dissipated device. When the temperature exceeds the preset temperature threshold, the control signal is output to control the air cooling module to assist in heat dissipation, and the flow rate and flow velocity of the refrigerant output by the compressor module are adjusted to improve the heat dissipation efficiency of the heat dissipation system while reducing energy consumption, thereby avoiding problems such as accelerated aging of the heat dissipated device due to excessively high temperature, resulting in reduced life or failure to operate normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of a heat dissipation system in one embodiment;

[0020] Figure 2 A circuit diagram of a control module and a temperature detection module in one embodiment;

[0021] Figure 3 A detailed schematic diagram of a refrigeration pipe in an embodiment;

[0022] Figure 4 This is an application scenario diagram of a heat dissipation system in an embodiment;

[0023] Figure 5 FIG. 4 is a working process of a heat dissipation system in one embodiment. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0026] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0027] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0028] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0029] In one embodiment, a heat dissipation system is provided. The heat dissipation system can be applied to home appliances or industrial equipment where the internal environment temperature is too high due to high heat generation. The system combines multiple heat dissipation methods such as air cooling and refrigerant to improve the heat dissipation efficiency. Figure 1 As shown, the heat dissipation system includes a control module 110, a temperature detection module 120, a compressor module 130, a fan module 140 and a refrigeration pipe 150. The control module 110 is connected to the temperature detection module 120, the compressor module 130 and the fan module 140. The compressor module 130 is connected to the refrigeration pipe 150 to form a circulation loop. The refrigeration pipe 150 is arranged on the heat dissipation device; the compressor module 130 is used to output the refrigerant to the refrigeration pipe 150 to dissipate the heat of the heat dissipation device; the temperature detection module 120 is used to detect the ambient temperature of the heat dissipation device; the control module 110 is used to control the operating state of the fan module 140 according to the ambient temperature and the preset temperature threshold, and control the output state of the refrigerant output by the compressor module 130, so as to achieve the purpose of regulating the heat dissipation efficiency of the heat dissipation system.

[0030] Specifically, the heat dissipation system includes two heat dissipation methods: refrigerant heat dissipation and air cooling. Refrigerant heat dissipation continuously dissipates heat for the heat dissipation device during its operation. At the same time, when the refrigerant heat dissipation efficiency is insufficient, air cooling is started to work together to improve the heat dissipation efficiency. In refrigerant heat dissipation, a compressor module 130 is used to generate a refrigerant medium to flow in a circulation loop formed by a refrigeration pipe 150. The refrigeration pipe 150 is set close to the heat dissipation device to absorb the heat emitted by the heat dissipation device to achieve the purpose of heat dissipation. Air cooling is to strengthen ventilation and accelerate the flow rate of air on the surface of the heat dissipation device through the fan module 140 to achieve a cooling effect.

[0031] Among them, in order to achieve better heat dissipation efficiency, the material of the refrigeration tube 150 is made of a gold material with high heat exchange efficiency, such as a copper tube, an aluminum tube or a Bondi tube (galvanized steel tube). In the present embodiment, the refrigeration tube 150 is a copper tube. In addition, when the refrigeration tube 150 is arranged close to the heat dissipation device, the area with the heat dissipation device should be increased as much as possible. Therefore, in the present embodiment, the refrigeration tube 150 is installed in a coil-shaped manner close to the surface of the heat dissipation device. Of course, it can also be other methods recognized by those skilled in the art that can increase the heat transfer area. It can be understood that the refrigeration tube 150 also needs to be set in a certain fixed manner, which can be carried out in a manner recognized by those skilled in the art, and will not be repeated in the embodiments of this application.

[0032] It can be understood that the method used in the control module 110 to determine whether the heat dissipation efficiency of the refrigerant is insufficient is not unique. The method may be to use the temperature detection module 120 to detect the ambient temperature of the heat dissipated device and compare the ambient temperature with a preset temperature threshold to make a judgment. In other embodiments, the temperature of the refrigerant may be detected and compared with the preset temperature threshold to make a judgment. In addition, it may also be possible to detect the pressure or gas-liquid ratio of the refrigerant to determine whether the heat dissipation efficiency of the refrigerant is insufficient. In the present embodiment, the temperature detection module 120 is arranged at a position close to the heat dissipated device, detects the ambient temperature of the heat dissipated device and sends it to the control module 110. Specifically, the temperature detection module 120 may be a temperature sensor, or a temperature measuring element such as a thermocouple, a thermal resistor, and a thermistor.

[0033] Furthermore, the control module 110 is also used to set a preset temperature threshold for judging whether the cooling efficiency of the refrigerant is insufficient. The preset temperature threshold is the critical temperature value at which the temperature rises due to insufficient cooling efficiency. It can be understood that when the temperature reaches the preset temperature threshold, it indicates that the cooling efficiency of the cooling system needs to be improved so that the temperature of the cooling device is reduced to below a reasonable temperature threshold. The reasonable temperature threshold here can be set to be the same as the preset temperature threshold, or it can be a temperature value lower than the preset temperature threshold. It is not limited and can be set according to actual conditions.

[0034] Therefore, further, the control module 110 outputs a control signal to the compressor module 130 and the fan module 140 after judging the ambient temperature fed back by the temperature detection module 120 and the preset temperature threshold, so as to improve the heat dissipation efficiency of the heat dissipation system.

[0035] Specifically, the control signal can control the fan module 140 to switch its operating state. Among them, the operating state of the fan module 140 may include two operating states of working or stopping working, and may also include operating states such as wind strength and wind direction angle. When the ambient temperature exceeds the preset temperature threshold, the control module 110 outputs a control signal, and the fan module 140 switches the two operating states of working or stopping working according to the control signal. Or, multiple sets of preset temperature thresholds are used to correspondingly adjust the wind strength, adjust the wind direction angle, etc., to speed up the flow rate of air on the surface of the heat dissipation device, so that the temperature of the heat dissipation device is reduced to below a reasonable temperature threshold. When the ambient temperature drops below a reasonable temperature threshold, the control module 110 stops outputting the control signal, and the fan module 140 switches the operating state to stopping working, or reduces the wind strength, so as to achieve the purpose of improving the heat dissipation efficiency and reduce the energy consumption of the heat dissipation system.

[0036] Furthermore, after outputting the control signal, the control module 110 can adjust the output state of the refrigerant output by the compressor module 130. Among them, the output state of the refrigerant may include parameters such as the flow rate, flow velocity or temperature of the refrigerant. In the present embodiment, the flow rate of the refrigerant is used as its output state. Similarly, the present embodiment also uses the detected ambient temperature of the heat dissipated device to adjust the output state of the refrigerant output by the compressor module 130. When the ambient temperature rises, the flow rate of the refrigerant output by the compressor module 130 is increased to increase the heat dissipation efficiency; when the ambient temperature decreases, the flow rate of the refrigerant output by the compressor module 130 is reduced to reduce the heat dissipation efficiency. This automatic control method can not only achieve the purpose of improving the heat dissipation efficiency, but also reduce the energy consumption of the heat dissipation system.

[0037] In the above-mentioned heat dissipation system, the control module makes a judgment based on the preset temperature threshold and the detected ambient temperature value of the heat dissipated device. When the temperature exceeds the preset temperature threshold, the control module outputs a control signal to control the air cooling module to assist in heat dissipation, and adjusts the flow rate and flow velocity of the refrigerant output by the compressor module, thereby improving the heat dissipation efficiency of the heat dissipation system while reducing energy consumption, and avoiding problems such as accelerated aging of the heat dissipated device due to excessively high temperature, resulting in reduced life or failure to operate normally.

[0038] In one embodiment, the temperature detection module 120 uses a thermistor to detect the ambient temperature of the heat dissipation device. Figure 2 As shown, the temperature detection module 120 includes a thermistor Rt1 and a resistor R1. After the thermistor Rt1 and the resistor R1 are connected in series, one end is connected to an external power supply, the other end is grounded, and the common end is connected to the control module 110.

[0039] Specifically, the thermistor Rt1 and the resistor R1 are connected in series to form a resistor voltage divider, one end of which is connected to the external power supply VCC terminal to obtain power, the other end is grounded, and the common end is connected to the control module 110. The control module 110 detects the voltage of the resistor R1 after voltage division to achieve temperature detection. It can be understood that the resistance value of the thermistor Rt1 changes with the induced temperature, and the voltage value of the thermistor Rt1 and the resistor R1 after voltage division will also change accordingly, and the control module 110 thereby realizes the input of the temperature detected by the temperature detection module 120.

[0040] Among them, the thermistor Rt1 is arranged near the heat dissipated element and detects its temperature. Specifically, the thermistor is a component whose resistance value changes with the change of temperature, and may include a positive temperature coefficient thermistor (PTC thermistor, Positive Temperature Coefficient thermistor) and a negative temperature coefficient thermistor (NTCthermistor, Negative Temperature Coefficient thermistor). In the present embodiment, the thermistor Rt1 is a negative temperature coefficient thermistor NTC resistor, that is, the resistance value of the thermistor Rt1 decreases with the increase of temperature. The resistor models selected for the thermistor Rt1 and the resistor R1 are not unique and can be selected according to actual conditions without this limitation. For example, in the present embodiment, the model of the selected NTC resistor is MF51 10K 3950, and the resistance value of the resistor R1 is selected as 10KΩ.

[0041] Furthermore, in this embodiment, if the ambient temperature of the heat dissipated device rises, the resistance value of the thermistor Rt1 will decrease, and the voltage division value of the thermistor Rt1 will also decrease, so the voltage division value of the resistor R1 input to the control module 110 through the common terminal will increase. If the ambient temperature of the heat dissipated device drops, the resistance value of the thermistor Rt1 will increase, and the voltage division value of the thermistor Rt1 will also increase, so the voltage division value of the resistor R1 input to the control module 110 through the common terminal will decrease. The voltage division value represents the voltage after the resistor divides the voltage.

[0042] In one embodiment, Figure 2 As shown, the control module 110 includes a preset temperature input circuit 111, a comparison control circuit 112 and a compressor module adjustment circuit 113. The comparison control circuit 112 is connected to the preset temperature input circuit 111, the temperature detection module 120, the compressor module adjustment circuit 113 and the fan module 140. The compressor module adjustment circuit 113 is connected to the compressor module 130.

[0043] Specifically, the preset temperature input circuit 111 is used to set the preset temperature threshold and output it to the comparison control circuit 112. The comparison control circuit 112 is used to compare the ambient temperature fed back by the temperature detection module 120 with the preset temperature threshold and then output a control signal to the compressor module adjustment circuit 113 and the fan module 140. The fan module 140 switches the operating state according to the control signal output by the comparison control circuit 112. The compressor module adjustment circuit 113 adjusts the output state of the refrigerant output by the compressor module 130 according to the control signal output by the comparison control circuit 112.

[0044] In one embodiment, Figure 2 As shown, the preset temperature input circuit 111 includes a resistor R2 and a potentiometer RW1 . The resistor R2 and the potentiometer RW1 are connected in series, one end of which is connected to an external power supply, the other end is grounded, and the common end is connected to the comparison control circuit 112 .

[0045] Specifically, the resistor R2 is connected in series with the potentiometer RW1 to form a resistor divider, one end of which is connected to the external power supply VCC terminal to obtain power supply, and the other end is grounded. The comparison control circuit 112 connects the common end of the resistor R2 and the potentiometer RW1 in series to detect the voltage divider value of the resistor R2, so as to realize the input of the preset temperature threshold. It can be understood that the potentiometer RW1 is a device for setting the preset temperature threshold, and its nominal resistance range corresponds to the range in which the temperature can be set, that is, each resistance value of the potentiometer RW1 corresponds to a set temperature value. The models selected by the potentiometer RW1 and the resistor R2 are not unique, and can be selected according to actual conditions without making this limitation. For example, in the present embodiment, the model of the potentiometer RW1 selected is 3296W, the nominal resistance range is 10Ω-2MΩ, and the resistance value of the resistor R2 is 95KΩ. In addition, the preset temperature input circuit 111 also includes a capacitor C1 connected to the common end of the resistor R2 and the potentiometer RW1 in series, and the capacitor C1 selects a capacitor with a capacitance value of 500pF.

[0046] In one embodiment, Figure 2 As shown, the comparison control circuit 112 includes a comparator N1, a resistor R3, a resistor R4, a switch tube Q1 and a control switch KA1. The non-inverting input end of the comparator N1 is connected to the temperature detection module 120, the inverting input end of the comparator N1 is connected to the preset temperature input circuit 111, the output end of the comparator N1 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to the control end of the switch tube Q1, and is also grounded through the resistor R4. The first end of the switch tube Q1 is grounded, and the second end of the switch tube Q1 is connected to the external power supply through the control part of the control switch KA1. The controlled part of the control switch KA1 is connected in series to the compressor module adjustment circuit 113, and is also connected in series to the power supply circuit of the fan module 140.

[0047] Specifically, the comparator N1 is a device that obtains a preset temperature threshold and the ambient temperature of the heat dissipated device and outputs after comparison, including a non-inverting input terminal, a reverse input terminal and an output terminal. When the input signal of the non-inverting input terminal of the comparator N1 is greater than the input signal of the reverse input terminal, the output terminal outputs a high level; when the input signal of the non-inverting input terminal of the comparator N1 is less than the input signal of the reverse input terminal, the output terminal outputs a low level. In this embodiment, the input signal of the non-inverting input terminal of the comparator N1 is the ambient temperature of the heat dissipated device, and the input signal of the non-inverting input terminal is the preset temperature threshold. It can be understood that when the ambient temperature of the heat dissipated device is greater than the preset temperature threshold, the output terminal outputs a high level; when the ambient temperature of the heat dissipated device is less than the preset temperature threshold, the output terminal outputs a low level. Among them, the selection of the comparator N1 is not unique. In this embodiment, the comparator N1 selects the LM931 comparator, the resistance value of the resistor R3 is 2KΩ; the resistance value of the resistor R4 is 0.8KΩ.

[0048] Further, the output end of the comparator N1 is connected to the control end of the switch tube Q1 through the resistor R3, and the output level signal controls the on and off of the switch tube Q1. Then, since the switch tube Q1 is connected to the power supply circuit of the control part of the control switch KA1, the on and off of the control switch KA1 can be controlled accordingly. It can be understood that when the ambient temperature of the heat dissipated device is greater than the preset temperature threshold, the output end of the comparator N1 outputs a high level, the control end of the switch tube Q1 is powered, the first end is connected to the second end, the power supply circuit of the control part of the corresponding control switch KA1 is turned on, the controlled part of the control switch KA1 is turned on, the compressor module adjustment circuit 113 is turned on, and the power supply circuit of the fan module 140 is turned on; when the ambient temperature of the heat dissipated device is less than the preset temperature threshold, the output end outputs a low level, the control end of the switch tube Q1 loses power, the first end is disconnected from the second end, the power supply circuit of the control part of the corresponding control switch KA1 is disconnected, the controlled part of the control switch KA1 is disconnected, the compressor module adjustment circuit 113 is disconnected, and the power supply circuit of the fan module 140 is disconnected.

[0049] Among them, the switch tube Q1 is an NPN type transistor, the selected model is 2SC4019, and its conduction voltage is 0.7V. The base of the transistor serves as the control end of the switch tube Q1, the emitter serves as the first end of the switch tube Q1, and the collector serves as the second end of the switch tube Q1. The control switch KA1 is an electromagnetic relay, model GMY2N-J, the coil of the electromagnetic relay serves as the control part of the control switch KA1, and the two pairs of contacts of the electromagnetic relay serve as the controlled parts of the power supply circuit of the compressor module adjustment circuit 113 and the fan module 140 in series.

[0050] In addition, the control part of the control switch KA1 is also connected in parallel with a freewheeling diode D1, the anode of the freewheeling diode D1 is connected to the second end of the switch tube Q1, and the cathode of the freewheeling diode D1 is connected to the external power supply. The model of the freewheeling diode D1 is GMY2N-J, and the freewheeling diode D1 is connected in parallel with the electromagnetic relay KA1 to play a protective role.

[0051] In one embodiment, Figure 2 As shown, the compressor module regulating circuit 113 includes a thermistor Rt3 and a resistor R5. After the thermistor Rt3 and the resistor R5 are connected in series, one end is connected to the external power supply through the controlled part of the control switch KA1, and the other end is grounded through the electronic expansion valve of the compressor module 130.

[0052] Specifically, after the compressor module regulating circuit 113 obtains the control signal, the output state of the refrigerant output by the compressor module 130 can be adjusted. Among them, the control signal can be understood as the high level obtained by the control part of the control switch KA1, and its controlled part is turned on and connected to the external power supply VCC terminal to obtain power supply. In addition, the compressor module regulating circuit 113 is connected to the electronic expansion valve of the compressor module 130, and the output state of the refrigerant output by it is adjusted. It can be understood that the opening of the electronic expansion valve corresponds to the flow rate of the refrigerant output by the compressor module 130. Among them, the model selected for the electronic expansion valve is UVK-18D.

[0053] Further, the compressor module regulating circuit 113 uses thermistor Rt3 to detect the ambient temperature of the heat dissipated device and then adjusts the opening of the electronic expansion valve. Thermistor Rt3 is an NTC resistor whose resistance value decreases with the increase of temperature, and an NTC resistor with a model of MF51 10K 3950 is also selected. Thermistor Rt3 is arranged near the heat dissipated element and detects its temperature. At the same time, thermistor Rt3, resistor R5 and electronic expansion valve are connected in series to control the opening of the electronic expansion valve. If the ambient temperature of the heat dissipated device rises, the resistance value of thermistor Rt3 will decrease, the partial pressure value of thermistor Rt3 will also decrease, and the partial pressure value of resistor R5 remains unchanged, then the partial pressure value obtained by the electronic expansion valve will increase, and the corresponding opening is increased to increase the flow rate of the output refrigerant to improve the heat dissipation capacity of the heat dissipation system. If the ambient temperature of the heat dissipation device drops, the resistance value of thermistor Rt3 will increase, the voltage division value of thermistor Rt3 will also increase, and the voltage division value of resistor R5 will remain unchanged. Then the voltage division value obtained by the electronic expansion valve will decrease, and its opening will be adjusted down accordingly to reduce the flow rate of the output refrigerant and reduce the heat dissipation efficiency.

[0054] In this embodiment, the heat dissipation efficiency of the heat dissipation system is automatically regulated by the ambient temperature of the heat dissipated device, which not only achieves the purpose of improving the heat dissipation efficiency but also reduces the energy consumption of the heat dissipation system.

[0055] In one embodiment, Figure 3 As shown, the refrigeration pipe 150 includes an inlet 151, an outlet 152, a straight pipe section 153 and a curved pipe section 154. The number of the straight pipe sections 153 is more than two, and each straight pipe section 153 is arranged in sequence on the heat dissipated device. Each straight pipe section 153 is connected to the inlet 151 and the outlet 152 after being connected end to end through the corresponding curved pipe section 154. The inlet 151 and the outlet 152 are also connected to the compressor module 130.

[0056] Specifically, the inlet 151 in the refrigeration pipe 150 is connected to the compressor module 130 to obtain the refrigerant, and after the heat released by the heat dissipation device is heat-exchanged through the straight pipe section 153 and the curved pipe section 154 connected at the head and tail, it becomes gaseous and flows back to the compressor module 130 from the outlet 152. Among them, the number of straight pipe sections 153 and curved pipe sections 154 is not fixed and can be set according to actual conditions. Figure 3 The pipe module 150 includes four straight pipe sections 153 and three curved pipe sections 154. After the straight pipe sections 153 and the curved pipe sections 154 are connected end to end as shown in the figure, they are connected to the inlet 151 and the outlet 152, and then connected to the compressor module 130.

[0057] Furthermore, due to the gradual heat exchange of the refrigerant during the flow process, the heat dissipation effect of the straight pipe section 153 of the heat dissipation device that first contacts the refrigerant is good, while the heat dissipation effect of the straight pipe section 153 that is farther away from the inlet 151 may gradually deteriorate with the flow of the refrigerant, which leads to uneven heat dissipation of the heat dissipation device by the heat dissipation system. Therefore, in one embodiment, each curved pipe section 154 is a capillary tube. Specifically, all curved pipe sections 154 in the refrigeration pipe 150 are changed into capillary tubes, and the aperture of the capillary tube is significantly smaller than that of other straight pipe sections 153, and the inner diameter is generally 0.7mm to 2.5mm, and the length is generally 100mm to 600mm. When the refrigerant flows from the straight pipe section through the capillary tube with a smaller aperture, the resistance effect causes its pressure and temperature to drop sharply, so that the temperature of the refrigerant in each straight pipe section is similar, and the heat dissipation effect is equivalent, so that the refrigeration pipe 150 heats the entire heat dissipation device evenly, avoiding the reduction of the service life of the heat dissipation device due to excessive regional temperature difference.

[0058] In one embodiment, Figure 3 As shown, the inlet 151 and the outlet 152 are both arranged in a funnel shape, and the ends with small cross-sections of the inlet 151 and the outlet 152 are both connected to the compressor module 130, and the ends with large cross-sections of the inlet 151 and the outlet 152 are both correspondingly connected to the straight pipe section 153. Specifically, by extending a gradually expanding and contracting slow flow zone at the inlet 151 and the outlet 152, the refrigerant can flow evenly at the inlet 151 and the outlet 152, which is also conducive to improving the heat dissipation efficiency.

[0059] In addition, the cooling pipe 150 also includes a radiator fixing plate 155, and the inlet 151, the outlet 152, the straight pipe section 153 and the curved pipe section 154 are all arranged on the radiator fixing plate 155. The radiator fixing plate 155 is used to fix the components of the heat dissipation system, and can also be conveniently arranged near the heat dissipated components.

[0060] In one embodiment, Figure 3 As shown, each straight pipe section 153 is evenly provided with a fin structure 156. Specifically, by adding the fin structure 156 in the heat dissipation straight pipe section 153, the heat transfer area is increased while the uniform flow of the fluid is also facilitated. It can be understood that the larger the heat transfer area, the higher the heat transfer efficiency, and the purpose of improving the heat dissipation efficiency of the heat dissipation system can be achieved. Among them, the shape of the fin structure 156 is not unique, and can be sheet-shaped, wavy or V-shaped. In this embodiment, as shown in FIG. Figure 3 As shown, a straight sheet-like fin structure is installed in the straight pipe section 153, which effectively increases the heat transfer area of ​​the refrigerant and improves the heat dissipation efficiency.

[0061] In one embodiment, a frequency conversion cabinet is provided, comprising the above-mentioned heat dissipation system, wherein the heat dissipation system is used to dissipate heat for heat-dissipated components in the frequency conversion cabinet.

[0062] Specifically, the power device IGBT is the main heat generating device in the frequency converter cabinet, and is also the main heat dissipated device of the heat dissipation system. Figure 4 As shown, the cooling pipe in the heat dissipation system is arranged close to the power device IGBT and dissipates heat for it. At the same time, the temperature detection module is also arranged close to the power device IGBT for its ambient temperature, and the heat dissipation system then regulates the heat dissipation efficiency of the heat dissipation system according to the ambient temperature and the preset temperature threshold.

[0063] Furthermore, if Figure 5 As shown, after the inverter cabinet is turned on, the cooling system automatically sets the preset temperature threshold according to the potentiometer input value, and then the temperature detection module detects the internal temperature of the inverter cabinet. When its temperature is lower than the preset temperature threshold, the refrigerant heat dissipation is independently performed. When its temperature is too high, it means that the refrigerant heat dissipation alone cannot effectively dissipate heat. At this time, the fan is turned on, air cooling is used to assist heat dissipation, and the electronic expansion valve is adjusted to increase the refrigerant flow, thereby enhancing the refrigerant heat dissipation.

[0064] In addition, the frequency converter cabinet also includes other components such as rectification, filtering, inversion, braking unit, drive unit, detection unit, microprocessing unit, etc., which are not described in detail in the embodiments of the present application.

[0065] In one embodiment, an electrical device is provided, comprising the above-mentioned frequency conversion cabinet.

[0066] Specifically, the electrical equipment is a device that needs to change the frequency through the frequency conversion cabinet to control the AC motor in the electrical equipment, which achieves the purpose of saving the energy consumption of the electrical equipment. Among them, the frequency conversion cabinet is the frequency conversion cabinet with a heat dissipation system that automatically adjusts the heat dissipation. The electrical equipment may include a refrigerator, an air conditioner or other electrical equipment that uses a frequency converter or a frequency conversion cabinet.

[0067] In this embodiment, by adding a heat dissipation system that can automatically adjust the heat dissipation efficiency, the heat dissipation efficiency is improved while reducing energy consumption, thereby avoiding problems such as the frequency converter cabinet and electrical equipment being aged rapidly due to high heat generation and high temperature of the power devices, resulting in reduced life or failure to operate normally.

[0068] The implementation solutions to the problems provided by the above-mentioned frequency conversion cabinets and electrical equipment include the implementation solutions recorded in the above-mentioned heat dissipation system. Therefore, the specific limitations in the above-mentioned one or more frequency conversion cabinets and electrical equipment embodiments can refer to the above-mentioned limitations on the heat dissipation system and will not be repeated here.

[0069] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A heat dissipation system, characterized in that: The system comprises: a control module, a temperature detection module, a compressor module, a fan module and a refrigeration pipe, wherein the control module is connected to the temperature detection module, the compressor module and the fan module, the compressor module is connected to the refrigeration pipe to form a circulation loop, and the refrigeration pipe is arranged in the heat dissipation device; the refrigeration pipe comprises an inlet, an outlet, a straight pipe section and a curved pipe section, the number of the straight pipe sections is more than two, and each of the straight pipe sections is sequentially arranged in the heat dissipation device, each of the straight pipe sections is connected to the inlet and the outlet after being connected end to end with the corresponding curved pipe section, and the inlet and the outlet are also connected to the compressor module, and each of the curved pipe sections is a capillary tube, and the aperture of the capillary tube is smaller than the aperture of the straight pipe section; The compressor module is used to output refrigerant to the refrigeration pipe to dissipate heat for the heat dissipation device; The temperature detection module is used to detect the ambient temperature of the heat dissipation device; The control module is used to control the operating state of the fan module according to the ambient temperature and the preset temperature threshold, and to control the output state of the refrigerant output by the compressor module, so as to achieve the purpose of regulating the heat dissipation efficiency of the heat dissipation system.

2. The heat dissipation system according to claim 1, characterized in that: The control module includes a preset temperature input circuit, a comparison control circuit and a compressor module adjustment circuit. The comparison control circuit is connected to the preset temperature input circuit, the temperature detection module, the compressor module adjustment circuit and the fan module. The compressor module adjustment circuit is connected to the compressor module.

3. The heat dissipation system according to claim 2, characterized in that: The comparison control circuit includes a comparator, a resistor R3, a resistor R4, a switch tube and a control switch. The comparator's non-inverting input end is connected to the temperature detection module, the inverting input end is connected to the preset temperature input circuit, the output end is connected to one end of the resistor R3, the other end of the resistor R3 is connected to the control end of the switch tube, and is also grounded through the resistor R4. The first end of the switch tube is grounded, and the second end of the switch tube is connected to an external power supply through the control part of the control switch. The controlled part of the control switch is connected in series to the compressor module adjustment circuit, and is also connected in series to the power supply circuit of the fan module.

4. The heat dissipation system according to claim 3, characterized in that: The compressor module regulating circuit includes a thermistor Rt3 and a resistor R5. After the thermistor Rt3 and the resistor R5 are connected in series, one end of the thermistor Rt3 is connected to an external power supply through the controlled part of the control switch, and the other end is grounded through the electronic expansion valve of the compressor module.

5. The heat dissipation system according to claim 1, characterized in that: The refrigeration pipe also includes a radiator fixing plate, and the inlet, the outlet, the straight pipe section and the bent pipe section are all arranged on the radiator fixing plate.

6. The heat dissipation system according to claim 1, characterized in that: The inlet and the outlet are both arranged in a funnel shape, the ends of the inlet and the outlet with smaller cross-sections are both connected to the compressor module, and the ends of the inlet and the outlet with larger cross-sections are both correspondingly connected to the straight pipe section.

7. The heat dissipation system according to claim 1, characterized in that: Fin structures are evenly arranged in each of the straight pipe sections.

8. The heat dissipation system according to claim 7, characterized in that: The fin structure is a straight sheet-like fin structure.

9. A frequency conversion cabinet, characterized in that: It comprises the heat dissipation system described in any one of claims 1 to 8, and the heat dissipation system is used to dissipate heat for the heat-dissipated components in the frequency converter cabinet.

10. An electrical device, characterized in that: Including the frequency conversion cabinet described in claim 9.

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