Heat dissipation control circuit, system and device

Abstract

The invention discloses a heat dissipation control circuit, system and device, and relates to the technical field of circuit control, and the circuit comprises an NTC resistor circuit, a temperature control circuit and an operational amplifier. 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; wherein the input end of the NTC resistance circuit is used as a first input end, and the voltage output connecting end of the operational amplifier is used as a first output end; the NTC resistance circuit comprises an NTC resistor or at least two NTC resistors connected in parallel. Through a specific circuit structure, the temperature control switch and the thermistor serve as the core, heat dissipation work 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 present application relates to the field of circuit technology, and in particular to a heat dissipation control circuit, system and device. Background Art

[0002] At present, the heat dissipation requirements corresponding to the heat-generating structure are usually variable. If a forced air cooling solution is used and a fixed-speed fan is operated at the maximum heat dissipation design capacity, or the need for low-temperature heat dissipation is ignored and the fan is turned on as soon as the power is turned on, there will be no energy saving effect. Therefore, this type of heat-generating structure requires a heat dissipation design with variable temperature control: when the heat is low, the heat dissipation system is operated with a low heat dissipation capacity with low energy consumption; when the heat is high, the heat dissipation system is operated with a high heat dissipation capacity with high energy consumption. However, in the current relevant technical field, there is a lack of a technical solution that can better achieve heat dissipation control.

[0003] Therefore, in order to meet actual needs, a heat dissipation control technology is now provided. Summary of the invention

[0004] In view of the defects existing in the prior art, the purpose of this application is to provide a heat dissipation control circuit, system and device. Through a specific circuit structure, with a temperature control switch and a thermistor as the core, the heat dissipation work is timely adjusted according to the temperature conditions, effectively reducing energy consumption while ensuring the heat dissipation effect, and meeting actual needs.

[0005] In order to achieve the above objectives, the technical solution adopted by this application is:

[0006] In a first aspect, the present application provides a heat dissipation control circuit, the circuit comprising an NTC resistor circuit, a temperature control circuit and an operational amplifier;

[0007] 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;

[0008] The output end of the temperature control circuit is connected to the output end of the operational amplifier; wherein,

[0009] The input end of the NTC resistor circuit serves as a first input end, and the connection end of the voltage output of the operational amplifier serves as a first output end;

[0010] The NTC resistor circuit includes one NTC resistor or at least two NTC resistors connected in parallel.

[0011] 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.

[0012] On the basis of the above technical solution, the temperature control circuit includes:

[0013] A first temperature-controlled switch and a first resistor connected in series;

[0014] a second resistor connected in parallel with the branch where the first temperature-controlled switch and the first resistor are located;

[0015] 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;

[0016] 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.

[0017] On the basis of the above technical solution, the temperature control circuit includes:

[0018] A first temperature control branch, wherein the first temperature control branch comprises a first temperature control switch and a first resistor connected in series;

[0019] A second temperature control branch connected in parallel with the first temperature control branch, wherein the second temperature control branch includes a third resistor and a second resistor connected in series; wherein,

[0020] A connection point between the first temperature-controlled switch and the first resistor is connected in series with a connection point between the third resistor and the second resistor;

[0021] The connection end between the input end of the first temperature-controlled switch and the input end of the third resistor serves as the input end of the temperature-controlled circuit;

[0022] 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.

[0023] On the basis of the above technical solution, the temperature control circuit includes a first temperature control branch, a second temperature control branch and a third temperature control branch connected in parallel;

[0024] The first temperature control branch includes a first temperature control switch and a first resistor connected in series;

[0025] The second temperature control branch includes a second temperature control switch and a second resistor connected in series;

[0026] The temperature control third branch includes a third resistor;

[0027] The input end of the first temperature-controlled switch, the input end of the second temperature-controlled switch and the connection end of the input end of the third resistor serve as the input end of the temperature-controlled circuit;

[0028] The output end of the first resistor, the output end of the second resistor and the connection end of the output end of the third resistor serve as the output end of the temperature control circuit.

[0029] Based on the above technical solution, the first output end is configured with a fan.

[0030] On the basis of the above technical solution, the first output end is configured with a power drive circuit and a fan.

[0031] Based on the above technical solution, the first input terminal is configured with a temperature judgment circuit

[0032] In a second aspect, the present application provides a heat dissipation control system, comprising: a shell having a receiving cavity formed therein, and the heat dissipation control circuit mentioned in the first aspect, which is arranged in the shell.

[0033] In a third aspect, the present application provides a heat dissipation control device, characterized in that the heat dissipation control device includes the system mentioned in the second aspect.

[0034] Compared with the prior art, the advantages of this application are:

[0035] This application uses a specific circuit structure, with a temperature control switch and a thermistor as the core, to timely adjust the heat dissipation work according to the temperature conditions, effectively reduce energy consumption while ensuring the heat dissipation effect, and meet actual needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 A first circuit structure diagram of the heat dissipation control circuit according to an embodiment of the present application;

[0038] Figure 2 A second circuit structure diagram of the heat dissipation control circuit of an embodiment of the present application;

[0039] Figure 3 A third circuit structure diagram of the heat dissipation control circuit according to an embodiment of the present application;

[0040] Figure 4 A fourth circuit structure diagram of the heat dissipation control circuit according to an embodiment of the present application;

[0041] Figure 5 A circuit structure diagram of a temperature determination circuit in a heat dissipation control circuit according to an embodiment of the present application;

[0042] Figure 6 A circuit structure diagram of a power driving circuit in a heat dissipation control circuit according to an embodiment of the present application;

[0043] In the figure:

[0044] 1. NTC resistor circuit; 2. Temperature control circuit; 3. Operational amplifier; 4. Fan; 5. Power drive circuit; 6. Temperature judgment circuit. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0046] The embodiments of the present application are further described in detail below in conjunction with the accompanying drawings.

[0047] The embodiments of the present application provide a heat dissipation control circuit, system and device. Through a specific circuit structure, with a temperature control switch and a thermistor as the core, the heat dissipation work is timely adjusted according to the temperature conditions, effectively reducing energy consumption while ensuring the heat dissipation effect, and meeting actual needs.

[0048] In order to achieve the above technical effects, the overall idea of ​​this application is as follows:

[0049] A heat dissipation control circuit, the circuit comprising an NTC resistor circuit 1, a temperature control circuit 2 and an operational amplifier 3:

[0050] The output end of the NTC resistor circuit 1, the input end of the temperature control circuit 2 and the inverting input end of the operational amplifier 3;

[0051] The output end of the temperature control circuit 2 is connected to the output end of the operational amplifier 3; wherein,

[0052] The input end of the NTC resistor 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;

[0053] The NTC resistor circuit 1 includes one NTC resistor or at least two NTC resistors connected in parallel.

[0054] The embodiments of the present application are further described in detail below in conjunction with the accompanying drawings.

[0055] First, see Figures 1 to 6 As shown, an embodiment of the present application provides a heat dissipation control circuit, the circuit comprising an NTC resistor circuit 1, a temperature control circuit 2 and an operational amplifier 3;

[0056] The output end of the NTC resistor circuit 1, the input end of the temperature control circuit 2 and the inverting input end of the operational amplifier 3 are connected;

[0057] The output end of the temperature control circuit 2 is connected to the output end of the operational amplifier 3; wherein,

[0058] The input end of the NTC resistor 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;

[0059] The NTC resistor circuit 1 includes one NTC resistor or at least two NTC resistors connected in parallel.

[0060] It should be noted that the embodiment of the present application aims to design a heat dissipation technical solution with variable temperature control: when the temperature is low, the heat dissipation system is operated with a low heat dissipation capacity with low energy consumption; when the temperature is high, the heat dissipation system is operated with a high heat dissipation capacity with high energy consumption.

[0061] The voltage control principle of the operational amplifier adder circuit will accumulate the current of each branch at the input end and feedback the accumulated effect at the output end. When the voltage of each branch at the input end is the same, the resistance of each branch determines the output voltage. Usually, the power supply capacity of the adder is insufficient, and it is generally necessary to add a power drive circuit to the back-end circuit.

[0062] In response to the above requirements and principles, the embodiment of the present application proposes a circuit based on an operational amplifier adder circuit and an NTC (Negative Temperature Coefficient) resistor circuit, which changes the resistance at the input end of the operational amplifier into an NTC resistor that is a variable resistor that can represent the current temperature. When the temperature rises, the overall impedance of the input end will decrease, indicating that the heat generation will increase; according to the functional characteristics of the adder, the output voltage of the operational amplifier will increase accordingly, indicating that the heat dissipation capacity of the heat dissipation system will increase. Through the subsequent power drive circuit at the output end, variable power is provided to the DC motor, thereby generating a variable speed, and the corresponding heat dissipation requirements are realized in real time.

[0063] In the embodiment of the present application, through a specific circuit structure, with a temperature control switch and a thermistor as the core, the heat dissipation work is timely adjusted according to the temperature conditions, effectively reducing energy consumption while ensuring the heat dissipation effect, thereby meeting actual needs.

[0064] Furthermore, a first protection resistor is configured in series with the NTC resistor of the NTC resistor circuit 1 .

[0065] Furthermore, the temperature control circuit 2 includes:

[0066] A first temperature-controlled switch and a first resistor connected in series;

[0067] a second resistor connected in parallel with the branch where the first temperature-controlled switch and the first resistor are located;

[0068] The connection end of the input end of the first temperature control switch and the input end of the second resistor serves as the input end of the temperature control circuit 2;

[0069] 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 2 .

[0070] Furthermore, the temperature control circuit 2 includes:

[0071] A first temperature control branch, wherein the first temperature control branch comprises a first temperature control switch and a first resistor connected in series;

[0072] A second temperature control branch connected in parallel with the first temperature control branch, wherein the second temperature control branch includes a third resistor and a second resistor connected in series; wherein,

[0073] A connection point between the first temperature-controlled switch and the first resistor is connected in series with a connection point between the third resistor and the second resistor;

[0074] The connection end of the input end of the first temperature control switch and the input end of the third resistor serves as the input end of the temperature control circuit 2;

[0075] 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 2 .

[0076] Furthermore, the temperature control circuit 2 includes a first temperature control branch, a second temperature control branch and a third temperature control branch connected in parallel;

[0077] The first temperature control branch includes a first temperature control switch and a first resistor connected in series;

[0078] The second temperature control branch includes a second temperature control switch and a second resistor connected in series;

[0079] The temperature control third branch includes a third resistor;

[0080] The input end of the first temperature-controlled switch, the input end of the second temperature-controlled switch and the connection end of the input end of the third resistor serve as the input end of the temperature-controlled circuit 2;

[0081] The output end of the first resistor, the output end of the second resistor and the connection end of the output end of the third resistor serve as the output end of the temperature control circuit 2 .

[0082] It should be noted that when the temperature control circuit 2 includes a first temperature control branch and a second temperature control branch connected in parallel with the first temperature control branch, or when the temperature control circuit 2 includes a first temperature control branch, a second temperature control branch and a third temperature control branch connected in parallel, that is, when the temperature control circuit 2 includes at least two branches, one of the branches must not have a temperature control switch, that is, at least one branch must have only resistance, otherwise, during specific operation, when all the temperature control switches are turned on, the output voltage will be out of control.

[0083] Furthermore, the first output end is provided with a fan 4 .

[0084] If necessary, the fan 4 may be an EC (Electrical Commutation) fan.

[0085] Furthermore, the first output end is configured with a power driving circuit 5 and a fan 4 .

[0086] Furthermore, the first input end is provided with a temperature determination circuit 6 .

[0087] As shown in the attached figure of the specification Figures 1 to 4 As shown, they are four different implementation forms of the technical solutions of the embodiments of the present application, wherein:

[0088] S1 is the first temperature control switch, S2 is the second temperature control switch, R1 is the first resistor, R2 is the second resistor, and R3 is the third resistor;

[0089] IC1 is operational amplifier 3;

[0090] RT1, RT2, RT3 to RTn are all NTC resistors on the NTC resistor circuit 1, and R4, R5 and R6 are first protection resistors configured in series on the corresponding NTC resistors.

[0091] Specifically, based on the drawings in the specification Figures 1 to 4 , the technical details of the technical solution of the embodiment of the present application are described:

[0092] At present, a certain type of electrical cabinet with a high degree of integration has a DC24V power supply. Multiple modules with obvious heat generation are assembled in the cabinet, which requires forced heat dissipation. The cabinet is designed with an air inlet at the bottom and an air outlet at the top. A fan motor is installed at the air outlet as an exhaust power device, and the cabinet is almost airtight. The typical heat module transformer needs to work continuously.

[0093] As shown in the attached figure of the specification Figure 1As shown, the temperature judgment circuit contains a thermistor. When the temperature reaches a certain value, such as 25°C, the DC bus path is controlled. The DC bus is obtained from the DC24V power supply in the cabinet. RT1, RT2, and RT3 are negative temperature coefficient thermistors, R25=9300Ω, R65=2200Ω.

[0094] RT1, RT2, and RT3 are installed on the devices where the three temperature measurement points are located.

[0095] S1 is a chip-type temperature control switch installed on the outer surface of the transformer. It is disconnected when the installation position is 100℃, which corresponds to the temperature inside the cabinet being 60℃. It automatically resumes closing at 95℃.

[0096] IC1 is an operational amplifier with a current carrying capacity of 20mA;

[0097] A power drive circuit is installed at the back end of IC1. The output voltage varies with the output of the operational amplifier and has an output capacity of 1A.

[0098] M means the DC fan can operate between 10VDC and 150VDC. The higher the voltage, the faster the speed. The maximum operating current does not exceed 1A.

[0099] R1 is a fixed resistor in series with S1, with a resistance of 4300Ω. R2 is a fixed resistor in parallel with the branch where R1 is located. R1 and R2 have the same resistance value and are both in the feedback circuit of IC1. Finally, an adder circuit with 3 resistors at the input end and an input voltage of 24VDC and 2 parallel resistors at the feedback end is formed.

[0100] After calculation, when the temperature is controlled at 25℃ to 65℃, if S1 is not disconnected, the output voltage range of the adder circuit is 17VDC-70VDC; if S1 is disconnected, the output voltage range of the adder circuit is 34VDC-140VDC. Both meet the electrical parameter requirements of the circuit components. Figure 1 The corresponding circuit corresponding component parameter input voltage calculation table is as follows Table 1

[0101]

[0102] As shown in the attached figure of the specification Figure 2 As shown, in order to facilitate the selection of DC motors and shorten the operating voltage range of DC motors, a fixed resistor R3 can be added to the non-series S1 loop of the feedback branch. When S1 is not in operation, R3 is bypassed by S1; when S1 is in operation, S1 is bypassed, and R3 is connected in series with the parallel R1 and R2 to form a feedback loop. Through the reasonable design of R1-R3 parameters, the need to shorten the output voltage range of the adder circuit can be met. For example, R1 = 4300Ω, R2 = 4300Ω, R3 = 1000Ω; at this time Figure 2The circuit corresponding component parameter output voltage calculation table is shown in Table 2. When S1 is disconnected, the output voltage range is controlled within 24VDC-103VDC, completing the reduction of the output voltage range. Figure 2 The corresponding circuit component parameter output voltage calculation table is shown in Table 2 below.

[0103] Table 2

[0104]

[0105] As shown in the attached figure of the specification Figure 3 As shown, if the input voltage at the input end of the adder is greater than the input voltage of the operational amplifier, a voltage divider resistor can be connected in series to each NTC resistor branch, such as the fixed resistor R4 connected in series to the RT1 branch.

[0106] At the input of the adder, more negative temperature coefficient sensors RTn can be added to monitor the required measurement points.

[0107] A plurality of SMD temperature control switches may also be designed on the feedback branch to monitor important heat-generating components, and at least one feedback branch may be kept free of temperature control switches so that the impedance of the feedback branch can be controlled.

[0108] As shown in the attached figure of the specification Figure 4 As shown, if the operational amplifier of the adder circuit has sufficient load capacity, the power driving circuit can be omitted.

[0109] In summary, the technical solution of the embodiment of the present application also has the following technical details:

[0110] The temperature judgment circuit configured in the technical solution of the embodiment of the present application has a temperature monitoring function, and power can be supplied only when the circuit reaches a certain temperature value.

[0111] The DC input power supply configured in the technical solution of the embodiment of the present application is a common voltage source for the input end of the adder, and the voltage amplitudes of the resistance branches at each input end are the same.

[0112] The NTC resistor in the technical solution of the embodiment of the present application is the resistance of each branch at the input of the adder, which is installed at each heat source as a temperature monitoring point.

[0113] The temperature control switch of the feedback branch in the technical solution of the embodiment of the present application is used on at least one feedback resistance branch, and at least one feedback branch is not equipped with a temperature control switch.

[0114] The resistor of the feedback branch in the technical solution of the embodiment of the present application is a fixed resistor.

[0115] The power driving circuit of the feedback branch in the technical solution of the embodiment of the present application is intended to solve the problem of insufficient driving capability of the adder. If the power supply capacity of the adder meets the power requirement of the DC motor, this driving circuit can be omitted.

[0116] The DC motor in the technical solution of the embodiment of the present application is characterized in that the rotation speed is in direct proportion to the supply voltage.

[0117] Furthermore, in order to prevent the adder circuit and its subsequent fan from starting at low temperature, a temperature judgment circuit is designed at the power supply input end, and power is allowed to be supplied to the adder input end only when the required temperature is reached.

[0118] In addition, the temperature control switch of the feedback branch is installed on the heat-generating component that is monitored and protected. Under normal working conditions, this temperature control switch remains open and has automatic recovery capability. When the protection temperature is reached and disconnected, the fixed resistance of this branch will be opened, and the feedback resistance of the other branch will function.

[0119] It should be noted that the fan 4, the power driving circuit 5 and the temperature judging circuit 6 may be replaced by other components as long as they can perform the corresponding functions.

[0120] The DC input power supply in the technical solution of the embodiment of the present application generally uses a low-voltage DC power supply that is conveniently available in the system;

[0121] When the DC power supply voltage is high, the NTC branch will be designed with a fixed resistor in series, which will ultimately ensure that the output voltage of the adder is within the effective lower voltage range to prevent damage to the adder.

[0122] The NTC resistor in the technical solution of the embodiment of the present application will decrease its resistance when the temperature of the measuring point where it is installed increases, which means that the heat generated by the measuring point component increases. When other NTC resistors do not change, the output voltage will increase, and the speed of the cooling fan will eventually increase, and the heat dissipation capacity will be improved.

[0123] The temperature control switch in the technical solution of the embodiment of the present application is installed on the heat-generating component that is monitored and protected, and the priority of the temperature change of this component can be increased. When the temperature control switch is activated, the effect of increasing the output voltage caused by the disconnection of the corresponding feedback branch is greater than the voltage accumulation effect of the input branch NTC resistor. This effect can ignore the problem of the accumulation of the inconsistent temperature change of some input branch NTC resistors and the key heat-generating objects.

[0124] The technical solution of the embodiment of the present application is based on an adder circuit, and changes in the resistance of the input terminal and the feedback terminal are achieved through engineering design innovation, thereby realizing engineering applications for adjusting the required output voltage.

[0125] In a second aspect, an embodiment of the present application provides a heat dissipation control system, comprising: a shell having a receiving cavity formed therein, and the heat dissipation control circuit mentioned in the first aspect, which is arranged in the shell.

[0126] In the embodiment of the present application, through a specific circuit structure, with a temperature control switch and a thermistor as the core, the heat dissipation work is timely adjusted according to the temperature conditions, effectively reducing energy consumption while ensuring the heat dissipation effect, thereby meeting actual needs.

[0127] It should be noted that the heat dissipation control system provided in the embodiment of the present application is similar to the heat dissipation control circuit mentioned in the first aspect in terms of technical problems, technical solutions, technical effects, and technical principles, so they will not be elaborated here.

[0128] In a third aspect, an embodiment of the present application provides a heat dissipation control device, characterized in that the heat dissipation control device includes the system mentioned in the second aspect.

[0129] In the embodiment of the present application, through a specific circuit structure, with a temperature control switch and a thermistor as the core, the heat dissipation work is timely adjusted according to the temperature conditions, effectively reducing energy consumption while ensuring the heat dissipation effect, thereby meeting actual needs.

[0130] It should be noted that the heat dissipation control device provided in the embodiment of the present application is similar in technical principles in terms of technical issues, technical solutions, technical effects, compared with the heat dissipation control circuit mentioned in the first aspect and the heat dissipation control system mentioned in the second aspect, so they will not be elaborated here.

[0131] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0132] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0133] The above description is only a specific implementation of the present application, so that those skilled in the art can 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 the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A heat dissipation control circuit, characterized in that: The circuit comprises an NTC resistance circuit (1), a temperature control circuit (2) and an operational amplifier (3); The output end of the NTC resistor 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 to the output end of the operational amplifier (3); wherein, The input end of the NTC resistor 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; The NTC resistor circuit (1) comprises one NTC resistor or at least two NTC resistors connected in parallel.

2. The heat dissipation control circuit according to claim 1, wherein: A first protective resistor is configured in series with the NTC resistor of the NTC resistor circuit (1).

3. The heat dissipation control circuit according to claim 1, characterized in that: The temperature control circuit (2) comprises: A first temperature-controlled switch and a first resistor connected in series; a second resistor connected in parallel with the branch where the first temperature-controlled switch and the first resistor are located; 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 (2); The connection end between 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 (2).

4. The heat dissipation control circuit according to claim 1, characterized in that: The temperature control circuit (2) comprises: A first temperature control branch, wherein the first temperature control branch comprises a first temperature control switch and a first resistor connected in series; A second temperature control branch connected in parallel with the first temperature control branch, wherein the second temperature control branch includes a third resistor and a second resistor connected in series; wherein, A connection point between the first temperature-controlled switch and the first resistor is connected in series with a connection point between the third resistor and the second resistor; The connection end between the input end of the first temperature-controlled switch and the input end of the third resistor serves as the input end of the temperature-controlled circuit (2); The connection end between 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 (2).

5. The heat dissipation control circuit according to claim 1, characterized in that: The temperature control circuit (2) comprises a first temperature control branch, a second temperature control branch and a third temperature control branch connected in parallel; The first temperature control branch includes a first temperature control switch and a first resistor connected in series; The second temperature control branch includes a second temperature control switch and a second resistor connected in series; The temperature control third branch includes a third resistor; The input end of the first temperature-controlled switch, the input end of the second temperature-controlled switch and the connection end of the input end of the third resistor serve as the input end of the temperature-controlled circuit (2); The output end of the first resistor, the output end of the second resistor and the connection end of the output end of the third resistor serve as the output end of the temperature control circuit (2).

6. The heat dissipation control circuit according to claim 1, wherein: The first output end is provided with a fan (4).

7. The heat dissipation control circuit according to claim 1, wherein: The first output end is provided with a power drive circuit (5) and a fan (4).

8. The heat dissipation control circuit according to claim 1, wherein: The first input end is provided with a temperature determination circuit (6).

9. A heat dissipation control system, characterized in that: include: A shell having an accommodating cavity formed therein, and the heat dissipation control circuit according to any one of claims 1 to 8 are arranged in the shell.

10. A heat dissipation control device, characterized in that: The heat dissipation control device comprises the system according to claim 9.

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