Electrical cabinet with heat dissipation function

Abstract

The utility model discloses an electrical cabinet with a heat dissipation function, and relates to the technical field of power electronics, and the electrical cabinet comprises an electrical cabinet main body which is provided with an air outlet; an electrical cabinet with a heat dissipation function comprises an NTC resistance circuit, a temperature control circuit, an operational amplifier and a terminal strip. The output end of the NTC resistance circuit, the input end of the temperature control circuit and the inverted input end of the operational amplifier are connected. The output end of the temperature control circuit is connected with the output end of the operational amplifier. Through a specific circuit structure, the temperature control switch and the thermistor serve as the core, heat dissipation work of the electrical cabinet is regulated and controlled in time according to the temperature condition, energy consumption is effectively reduced on the premise that the heat dissipation effect is guaranteed, and the actual requirement is met.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of power electronics, in particular to an electrical cabinet with a heat dissipation function. BACKGROUND

[0002] At present, due to the constraints of space and cost, the integration of internal components of the electrical cabinet is gradually improved, in order to ensure the reliability of the internal components of the cabinet and avoid thermal failure, the heat dissipation design will be a challenge. At present, when the heat flux density of the electronic equipment is large, forced air cooling is a conventional convective heat dissipation design. Among them, the electrical cabinet is designed with an air inlet and an air outlet, which is suitable for the design of the cabinet with relatively dispersed heat dissipation.

[0003] Part of the electrical cabinet, the working condition of the internal components of the cabinet can be changed, so that the heat consumption is not a constant value, and the corresponding heat dissipation capacity should also be variable. If the forced air cooling scheme is used to run the constant speed fan at the maximum heat dissipation design capacity, or the low temperature does not need to be ignored, the fan is started as soon as the power is on, and there is no energy saving effect. Therefore, such an electrical cabinet needs a variable temperature control heat dissipation design: when the internal components of the cabinet are low in heat generation, the heat dissipation system runs at low heat dissipation capacity with low energy consumption; only when the internal components of the cabinet are high in heat generation, the heat dissipation system runs at high heat dissipation capacity with high energy consumption.

[0004] Therefore, in order to meet the actual needs, the present application provides an electrical cabinet with a heat dissipation function. SUMMARY

[0005] In view of the defects in the prior art, the purpose of the present application is to provide an electrical cabinet with a heat dissipation function, which is based on the core of temperature control switch and thermistor, and can timely regulate and control the heat dissipation work of the electrical cabinet according to the temperature condition, effectively reduce the energy consumption under the premise of ensuring the heat dissipation effect, and meet the actual needs.

[0006] In order to achieve the above purpose, the technical scheme adopted by the present application is:

[0007] The present application provides an electrical cabinet with a heat dissipation function, which comprises:

[0008] The electrical cabinet body is provided with an air outlet;

[0009] The electrical cabinet with a heat dissipation function comprises an NTC resistance circuit, a temperature control circuit, an operational amplifier and a terminal block:

[0010] The output end of the NTC resistance circuit, the input end of the temperature control circuit and the inverting input end of the operational amplifier are connected;

[0011] The output end of the temperature control circuit is connected with the output end of the operational amplifier; wherein,

[0012] The input end of the NTC resistor circuit serves as a first input end, the voltage output connection end of the operational amplifier serves as a first output end, the first output end is configured with a fan, and the fan is installed on the air outlet;

[0013] The NTC resistor circuit includes a plurality of NTC resistors connected in parallel, and each of the NTC resistors is correspondingly configured at a preset temperature monitoring point on the electrical cabinet body;

[0014] The output end of the NTC resistor circuit, the input end of the temperature control circuit and the inverting input end of the operational amplifier are connected through the terminal block;

[0015] The output end of the temperature control circuit is connected to the output end of the operational amplifier via the terminal block;

[0016] The first output end is configured with the fan via the terminal block.

[0017] Based on the above technical solution, the NTC resistor circuit includes three NTC resistors connected in parallel.

[0018] On the basis of the above technical solution, the temperature monitoring point is located on a heating device preset in the electrical cabinet body.

[0019] On the basis of the above technical solution, a first protection resistor is configured in series with the NTC resistor of the NTC resistor circuit.

[0020] On the basis of the above technical solution, the temperature control circuit includes:

[0021] A first temperature-controlled switch and a first resistor connected in series;

[0022] a second resistor connected in parallel with the branch where the first temperature-controlled switch and the first resistor are located;

[0023] The connection end between the input end of the first temperature-controlled switch and the input end of the second resistor serves as the input end of the temperature-controlled circuit;

[0024] The connection end of the output end of the first resistor and the output end of the second resistor serves as the output end of the temperature control circuit.

[0025] On the basis of the above technical solution, the first output end is further configured with a power drive circuit for driving the fan;

[0026] The first output end is configured to drive the power driving circuit of the fan through the terminal block.

[0027] On the basis of the above technical solution, the first input end is configured with a temperature judgment circuit;

[0028] The first input end is configured with the temperature judging circuit through the terminal row.

[0029] On the basis of the above technical solution, the fan is an EC fan.

[0030] Compared with the prior art, the application has the advantages that:

[0031] The application uses a temperature control switch and a thermistor as the core, and timely controls the heat dissipation of the electrical cabinet according to the temperature, effectively reduces the energy consumption under the premise of ensuring the heat dissipation effect, and meets the actual demand. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0033] Figure 1 The structure diagram of the electrical cabinet with the heat dissipation function in the embodiment of the application;

[0034] Figure 2 The first circuit structure diagram of the electrical cabinet with the heat dissipation function in the embodiment of the application;

[0035] Figure 3 The second circuit structure diagram of the electrical cabinet with the heat dissipation function in the embodiment of the application;

[0036] Figure 4 The circuit structure diagram of the temperature judging circuit in the heat dissipation control circuit in the embodiment of the application;

[0037] Figure 5 The circuit structure diagram of the power driving circuit in the heat dissipation control circuit in the embodiment of the application;

[0038] Figure 6 The working principle schematic diagram of the terminal row in the heat dissipation control circuit in the embodiment of the application;

[0039] In the drawings:

[0040] 1, NTC resistance circuit; 2, temperature control circuit; 3, operational amplifier; 4, fan; 5, electrical cabinet main body; 50, air outlet; 6, power driving circuit; 7, temperature judging circuit; 8, terminal row. DETAILED DESCRIPTION

[0041] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present application.

[0042] The embodiments of the present application are further described in detail below with reference to the drawings.

[0043] The embodiments of the present application provide an electrical cabinet with a heat dissipation function. By a specific circuit structure, the electrical cabinet is timely regulated and controlled for heat dissipation work according to temperature conditions, energy consumption is effectively reduced under the premise of guaranteeing heat dissipation effect, and actual needs are met.

[0044] To achieve the above technical effects, the general idea of the present application is as follows:

[0045] An electrical cabinet with a heat dissipation function, comprising:

[0046] An electrical cabinet main body 5, wherein an air outlet 50 is arranged on the electrical cabinet main body 5;

[0047] The electrical cabinet with a heat dissipation function comprises an NTC resistance circuit 1, a temperature control circuit 2, an operational amplifier 3 and a terminal block 8.

[0048] The output end of the NTC resistance circuit 1, the input end of the temperature control circuit 2 and the inverting input end of the operational amplifier 3 are connected.

[0049] The output end of the temperature control circuit 2 is connected with the output end of the operational amplifier 3; wherein

[0050] The input end of the NTC resistance circuit 1 is configured as a first input end, the connection end of the voltage output of the operational amplifier 3 is configured as a first output end, and the first output end is configured with a fan 4, and the fan 4 is installed on the air outlet 50.

[0051] The NTC resistance circuit 1 comprises a plurality of parallel NTC resistors, and each NTC resistor is correspondingly arranged on a preset temperature monitoring point on the electrical cabinet main body 5.

[0052] The output end of the NTC resistance circuit 1, the input end of the temperature control circuit 2 and the inverting input end of the operational amplifier 3 are connected through the terminal block 8.

[0053] The output end of the temperature control circuit 2 is connected with the output end of the operational amplifier 3 through the terminal block 8.

[0054] The first output end is configured with the fan 4 through the terminal row 8.

[0055] The embodiments of the present application are further described in detail below with reference to the accompanying drawings.

[0056] Referring to Figures 1-5 The embodiments of the present application provide an electrical cabinet with heat dissipation function, which comprises:

[0057] An electrical cabinet body 5 is provided with an air outlet 50;

[0058] The electrical cabinet with heat dissipation function comprises an NTC resistance circuit 1, a temperature control circuit 2, an operational amplifier 3 and a terminal row 8:

[0059] The output end of the NTC resistance circuit 1, the input end of the temperature control circuit 2 and the inverting input end of the operational amplifier 3 are connected;

[0060] The output end of the temperature control circuit 2 is connected with the output end of the operational amplifier 3; wherein,

[0061] The input end of the NTC resistance circuit 1 serves as a first input end, and the voltage output connection end of the operational amplifier 3 serves as a first output end, which is configured with a fan 4 installed on the air outlet 50;

[0062] The NTC resistance circuit 1 comprises a plurality of parallelly connected NTC resistors, each of which is correspondingly configured on a preset temperature monitoring point on the electrical cabinet body 5;

[0063] The output end of the NTC resistance circuit 1, the input end of the temperature control circuit 2 and the inverting input end of the operational amplifier 3 are connected through the terminal row 8;

[0064] The output end of the temperature control circuit 2 is connected with the output end of the operational amplifier 3 through the terminal row 8;

[0065] The first output end is configured with the fan 4 through the terminal row 8.

[0066] It should be noted that the embodiments of the present application aim to design a variable temperature control heat dissipation technical scheme: in low heat generation, the heat dissipation system is operated with low heat dissipation capacity and low energy consumption; in high heat generation, the heat dissipation system is operated with high heat dissipation capacity and high energy consumption.

[0067] The voltage control principle of the operational amplifier adder circuit will accumulate the branch currents of the input end and feedback the accumulation effect at the output end. When the voltages of the branches at the input end are the same, the resistance of each branch determines the voltage at the output end. The power supply capacity of the adder is usually insufficient, and a power drive circuit usually needs to be added in the rear-end circuit.

[0068] To meet the above needs and principles, the embodiment of the present application proposes an operational amplifier adder circuit and an NTC (Negative Temperature Coefficient) resistor circuit. The resistance at the input end of the operational amplifier is changed to the NTC resistor which can represent the variable resistance of the temperature status. When the temperature rises, the overall impedance at the input end will decrease, indicating that the heat generation increases. According to the functional characteristics of the adder, the output voltage of the operational amplifier will increase, indicating that the heat dissipation system will have a larger heat dissipation capacity. Through the subsequent power drive circuit at the output end, variable power is provided for the DC motor, thereby generating variable speed and realizing real-time heat dissipation requirements.

[0069] It should be noted that the terminal row 8 is the input end wiring processing area of the control module adder circuit, which is the hub of the wiring branch, and has a jumper and a short-circuit structure.

[0070] The branches of the NTC resistor circuit 1, the temperature control circuit 2, and the operational amplifier 3 are connected at this wiring branch point, and the topological structure of the input end and the feedback end resistor circuit arrangement is realized.

[0071] The present application uses specific circuit structure, takes temperature control switch and thermistor as core, and timely regulates and controls the heat dissipation work of the electrical cabinet according to temperature conditions, effectively reduces energy consumption under the premise of ensuring heat dissipation effect, and meets actual needs.

[0072] Further, the NTC resistor circuit 1 includes three parallel NTC resistors.

[0073] Further, the temperature monitoring point is located on the preset heat generating equipment in the electrical cabinet main body 5.

[0074] Further, the first protection resistor is connected in series with the NTC resistor of the NTC resistor circuit 1.

[0075] Further, the temperature control circuit 2 includes:

[0076] The first temperature control switch and the first resistor are connected in series.

[0077] The second resistor is connected in parallel with the branch where the first temperature control switch and the first resistor are located.

[0078] The connecting end of the input end of the first temperature control switch and the input end of the second resistance is as the input end of the temperature control circuit 2.

[0079] The connecting end of the output end of the first resistance and the output end of the second resistance is as the output end of the temperature control circuit 2.

[0080] Further, the first output end is further configured with a power drive circuit 6 for driving the fan;

[0081] The first output end is configured with the power drive circuit 6 for driving the fan 4 through the terminal row 8.

[0082] Further, the first input end is configured with a temperature judgment circuit 7;

[0083] The first input end is configured with the temperature judgment circuit 7 through the terminal row 8.

[0084] Further, the fan 4 is an EC (Electrical Commutation) fan.

[0085] It should be noted that, as shown in the accompanying drawings of the specification Figure 1 A certain type of electrical cabinet with high integration has a DC power supply, and three modules with obvious heating are assembled in the cabinet, so that the electrical cabinet needs forced cooling mode. The electrical cabinet is designed with an air inlet at the bottom and an air outlet at the top, and a fan motor is installed at the air outlet as a power device for air extraction. The cabinet body is almost airtight. The light-weight heating equipment A and the heating equipment B are installed in the middle of the electrical cabinet, and the heavy-weight heating equipment C needs to work continuously and is installed at the bottom of the electrical cabinet.

[0086] And the arrangement of temperature monitoring point X, temperature monitoring point Y and temperature monitoring point Z also corresponds to heating equipment A, heating equipment B and heating equipment C respectively.

[0087] The electrical cabinet has a wire binding frame and a wire slot inside the structure, which facilitates the wire fixing of all electronic and electrical equipment or components.

[0088] The heating equipment 1 is externally fixed and arranged Figure 2 The NTC resistance RT1, the heating equipment 2 is externally fixed and arranged Figure 2 The NTC resistance RT2, the heating equipment 3 is externally fixed and arranged Figure 2 The NTC resistance RT3, and a surface-mounted temperature control switch S1 is arranged, and the temperature rise at S1 is usually higher than that at RT3.

[0089] As shown in the accompanying drawings of the specification Figures 2-5 The circuit structure of the technical scheme of the embodiment of the application, wherein,

[0090] S1 is a first temperature control switch, R1 is a first resistor, R2 is a second resistor; IC1 is an operational amplifier 3;

[0091] RT1, RT2, RT3 to RTn are NTC resistors on the NTC resistor circuit (1), and R4, R5 and R6 are first protection resistors arranged in series on the corresponding NTC resistors.

[0092] Specifically, based on the drawings of the specification Figures 1-5 The technical details of the technical solutions of the embodiments of the application are described:

[0093] At present, a certain type of electrical cabinet with high integration has a DC 24V power supply, and a plurality of modules with obvious heating are assembled in the cabinet, so that the electrical cabinet needs forced cooling mode. The electrical cabinet is designed with an air inlet at the bottom and an air outlet at the top, and a fan motor is installed at the air outlet as a power device for air extraction. The cabinet body is almost airtight. The typical heating module transformer needs to work continuously.

[0094] As shown in the drawings of the specification Figure 1 The temperature judgment circuit contains a thermistor, which controls the DC bus path only when the temperature reaches a certain value, such as 25℃. The DC bus is obtained from the DC 24V power supply in the cabinet. RT1, RT2, RT3 are negative temperature coefficient thermistors, R25 = 9300Ω, and R65 = 2200Ω.

[0095] RT1, RT2, RT3 are installed on the equipment at three temperature measuring points respectively.

[0096] S1 is a surface mount temperature control switch installed on the outer surface of the transformer. It is disconnected when the installation position is 100℃. At this time, the corresponding cabinet temperature is 60℃, and the automatic recovery is closed at 95℃.

[0097] IC1 is an operational amplifier with a current carrying capacity of 20mA.

[0098] A power drive circuit is installed at the back end of IC1. The output voltage changes with the output end of the operational amplifier, and has an output capacity of 1A.

[0099] M is a DC fan that can work between 10VDC and 150VDC. The higher the voltage, the faster the speed, and the maximum working current does not exceed 1A.

[0100] R1 is a fixed resistor in series with S1, with a resistance of 4300Ω. R2 is a fixed resistor in parallel with the branch of R1. R1 and R2 have the same resistance, and are both in the feedback circuit of IC1. Finally, an adder circuit with three resistors in the input end and two parallel resistors in the feedback end is formed.

[0101] After calculation, when the temperature is controlled at 25-65℃, the output voltage of the adder circuit ranges from 17VDC to 70VDC if S1 is on, and ranges from 34VDC to 140VDC if S1 is off, both of which meet the electrical parameter requirements of the loop components. Figure 1 The corresponding circuit component parameter input voltage calculation table is shown in Table 1 below.

[0102] Table 1

[0103]

[0104] If necessary, the power driving circuit can be omitted if the operational amplifier of the adder circuit has sufficient load capacity.

[0105] In summary, the technical scheme of the embodiment of the present application also has the following technical details:

[0106] The temperature judgment circuit configured in the technical scheme of the embodiment of the present application has a temperature monitoring function, and power supply can be provided only after the circuit reaches a certain temperature value.

[0107] The direct current input power source configured in the technical scheme of the embodiment of the present application is a common voltage source of the input end of the adder, and the voltage amplitudes of the resistance branches of each input end are the same.

[0108] The NTC resistor in the technical scheme of the embodiment of the present application is a resistance branch of the adder at the input, which is installed at each heat source as a temperature monitoring point.

[0109] The temperature control switch of the feedback branch in the technical scheme of the embodiment of the present application is used at least on one feedback resistance branch, and at least one branch of the feedback branch does not have a temperature control switch.

[0110] The resistor of the feedback branch in the technical scheme of the embodiment of the present application is a fixed resistor.

[0111] The power driving circuit of the feedback branch in the technical scheme of the embodiment of the present application aims to solve the problem of insufficient driving capacity of the adder, and if the power supply capacity of the adder meets the power demand of the direct current motor, this driving circuit can be omitted.

[0112] The direct current motor in the technical scheme of the embodiment of the present application is characterized in that the speed is in a positive proportional relationship with the power supply voltage.

[0113] Furthermore, in order to avoid low-temperature start of the adder circuit and the fan after it, a temperature judgment circuit is designed at the power supply input end, and power supply to the input end of the adder is allowed only when the required temperature is reached.

[0114] In addition, the temperature control switch of the feedback branch is installed on the heat generating component which is monitored and protected, and the temperature control switch keeps open under normal conditions. When the temperature control switch is closed, the fixed resistor of the branch is opened, and the feedback resistor of the other branch works.

[0115] It should be noted that the fan 4, the power driving circuit 5 and the temperature judgment circuit 6 can be replaced by other components as long as the corresponding functions can be completed.

[0116] The direct current input power supply in the technical scheme of the embodiment of the application generally uses a low voltage direct current power supply which is convenient and available in the system.

[0117] When the voltage of the convenient and available direct current power supply is relatively high, the NTC branch is designed with a fixed resistor in series. Finally, the voltage at the output end of the adder is ensured to be within an effective lower voltage, so as to prevent the adder from being damaged.

[0118] When the temperature at the installation point of the NTC resistor increases, the resistance value of the NTC resistor decreases, which represents that the heat generation of the component at the installation point increases. When other NTC resistors do not change, the voltage at the output end increases, and finally the speed of the cooling fan increases, and the cooling capacity is improved.

[0119] The temperature control switch in the technical scheme of the embodiment of the application is installed on the heat generating component which is monitored and protected, and the priority of the temperature change of the component is improved. When the temperature control switch acts, the increase of the output voltage caused by the disconnection of the corresponding feedback branch is greater than the voltage accumulation effect of the NTC resistor of the input branch. This effect can ignore the problem that the accumulation of the NTC resistor of the input branch and the temperature change of the heat generating object are inconsistent.

[0120] The technical scheme of the embodiment of the application is based on the adder circuit, and the resistance change of the input end and the feedback end is innovatively designed through engineering, so as to realize the engineering application of adjusting the required output voltage.

[0121] In addition, the terminal row 8 is the input end wiring processing area of the adder circuit of the control module, is the hub of the wiring distribution, has a jumper and a short circuit structure, and is the hub of the wiring distribution.

[0122] The branches of the input end of the adder control module are connected at the wiring distribution point, and one end of the feedback circuit of the adder control module is also connected at the wiring distribution point, so as to realize the topological structure of the resistance circuit of the input end and the feedback end of the adder circuit.

[0123] In the description of the present application, it should be noted that the terms "upper", "lower", and the like are used for indicating the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0124] It should be noted that in the present application, relational terms such as "first" and "second", and the like are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus including a series of elements includes not only those elements, but also other elements not explicitly listed, or other elements inherent in such a process, method, article or apparatus. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of other identical elements in the process, method, article or apparatus including the element.

[0125] The above is only a specific embodiment of the present application, which enables those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. An electrical cabinet having a heat dissipation function, characterized by comprising: The electrical cabinet comprises: An electrical cabinet body (5) provided with an air outlet (50); The electrical cabinet with heat dissipation function comprises an NTC resistance circuit (1), a temperature control circuit (2), an operational amplifier (3) and a terminal block (8): The output end of the NTC resistance circuit (1), the input end of the temperature control circuit (2) and the inverting input end of the operational amplifier (3) are connected; The output end of the temperature control circuit (2) is connected with the output end of the operational amplifier (3); wherein, The input end of the NTC resistance circuit (1) is used as a first input end, and the connection end of the voltage output of the operational amplifier (3) is used as a first output end, and the first output end is provided with a fan (4) installed on the air outlet (50); The NTC resistance circuit (1) comprises a plurality of parallel NTC resistors, and each NTC resistor is correspondingly arranged on a preset temperature monitoring point on the electrical cabinet body (5); The output end of the NTC resistance circuit (1), the input end of the temperature control circuit (2) and the inverting input end of the operational amplifier (3) are connected through the terminal block (8); The output end of the temperature control circuit (2) is connected with the output end of the operational amplifier (3) through the terminal block (8); The first output end is provided with the fan (4) through the terminal block (8).

2. The electrical cabinet with heat dissipation function according to claim 1, wherein: The NTC resistance circuit (1) comprises three parallel NTC resistors.

3. The electrical cabinet with heat dissipation function according to claim 1, wherein: The temperature monitoring point is located on a preset heating device in the electrical cabinet body (5).

4. The electrical cabinet with heat dissipation function according to claim 1, wherein: A first protection resistor is arranged in series on the NTC resistor of the NTC resistance circuit (1).

5. The electrical cabinet with heat dissipation function according to claim 1, wherein, The temperature control circuit (2) comprises: A first temperature control switch and a first resistor in series; A second resistor in parallel with the branch in which the first temperature control switch and the first resistor are located; The connection end of the input end of the first temperature control switch and the input end of the second resistor is used as the input end of the temperature control circuit (2); The connection end of the output end of the first resistor and the output end of the second resistor is used as the output end of the temperature control circuit (2).

6. The electrical cabinet with heat dissipation function according to claim 1, wherein: The first output end is further provided with a power driving circuit (6) for driving the fan; The first output end is provided with the power driving circuit (6) for driving the fan (4) through the terminal block (8).

7. The electrical cabinet with heat dissipation function according to claim 1, wherein: The first input end is provided with a temperature judgment circuit (7); The first input end is provided with the temperature judgment circuit (7) through the terminal block (8).

8. The electrical cabinet with heat dissipation function according to claim 1, wherein: The fan (4) is an EC fan.

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