Power consumption control circuit and detection device

Abstract

The present application relates to the technical field of equipment testing, and discloses a power consumption control circuit and a detection device, wherein the power consumption control circuit includes a transistor, a load unit, a voltage follower unit, a control unit, and a temperature detection unit, wherein the first pole of the transistor is used to access a power supply, the second pole is electrically connected to one end of the load unit, and the other end of the load unit is used for grounding; the first input end of the voltage follower unit is connected between the transistor and the load unit, the second input end is used to access a control voltage, and the output end is electrically connected to the control pole of the transistor; the temperature detection unit is used to detect the temperature of the transistor and the load unit; the control unit is used to control the magnitude of the control voltage according to the temperature value, and the magnitude of the current value flowing from the first pole to the second pole and the load unit is controlled by controlling the magnitude of the control voltage, so as to control the power consumption generated by the transistor and the load unit. In the above manner, the present application realizes the reduction of the detection cost of the immersion liquid cooling system.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of equipment testing, and in particular to a power consumption control circuit and a detection device. Background Art

[0002] Common liquid cooling methods include cold plate, spray and immersion. Among them, immersion liquid cooling has high heat transfer efficiency and is currently the best solution to reduce energy consumption. The server that needs to be cooled is placed in the immersion liquid cooling system, and the coolant flowing through the server absorbs the heat generated by the server to achieve heat dissipation for the server.

[0003] Before the immersion liquid cooling system is delivered and put into use, it needs to be tested for heat dissipation to check whether its heat dissipation function is good. If the immersion liquid cooling system is tested with a real server, it will cause certain losses to the real server and the testing cost is high. At present, there is a lack of a circuit that can control power consumption. By controlling the power consumption generated by the circuit to be as equal to the power consumption generated by the real server as possible, the immersion liquid cooling system can be tested for heat dissipation instead of the real server, thereby reducing the testing cost. Utility Model Content

[0004] In view of the above problems, an embodiment of the present application provides a power consumption control circuit and a detection device, which are used to solve the problem of high detection cost when performing heat dissipation detection on an immersion liquid cooling system in the prior art.

[0005] According to one aspect of an embodiment of the present application, a power consumption control circuit is provided, which includes a transistor, a load unit, a voltage follower unit, a control unit and a temperature detection unit, wherein the first electrode of the transistor is used to connect to a power supply, the second electrode of the transistor is electrically connected to one end of the load unit, and the other end of the load unit is used to be grounded; the first input end of the voltage follower unit is connected between the transistor and the load unit, the second input end of the voltage follower unit is used to connect to a control voltage, and the output end of the voltage follower unit is electrically connected to the control electrode of the transistor; the temperature detection unit is used to detect the temperature of the transistor and the load unit; the control unit is used to obtain the temperature value detected by the temperature detection unit, and control the size of the control voltage connected to the second input end of the voltage follower unit according to the temperature value, and control the size of the current value flowing from the first electrode to the second electrode and the load unit by controlling the size of the control voltage, so as to control the power consumption generated by the transistor and the load unit.

[0006] In an optional manner, the voltage follower unit includes a first operational amplifier, a non-inverting input terminal of the first operational amplifier is the first input terminal, and an inverting input terminal of the first operational amplifier is the second input terminal.

[0007] In an optional manner, the voltage follower unit further includes a first resistor, one end of the first resistor is electrically connected to the non-inverting input terminal, and the other end of the first resistor is electrically connected to the output terminal of the first operational amplifier.

[0008] In an optional manner, the circuit further includes a voltage amplifying unit, an input end of the amplifying unit is connected between the transistor and the load unit, and an output end of the amplifying unit is electrically connected to a first input end of the voltage follower unit.

[0009] In an optional manner, the voltage amplification unit includes a second operational amplifier, a second resistor and a third resistor; the negative phase input terminal of the second operational amplifier is connected between the transistor and the load unit, the positive phase input terminal of the second operational amplifier is electrically connected to one end of the second resistor and one end of the third resistor respectively, the other end of the second resistor is used for grounding, and the output terminal of the second operational amplifier is electrically connected to the first input terminal of the voltage follower unit and the other end of the third resistor respectively.

[0010] According to another aspect of an embodiment of the present application, a detection device is provided, comprising a housing and a power consumption control circuit as described above, wherein the power consumption control circuit is arranged in the housing, and the detection device is used to be arranged in an immersion liquid cooling system, and to allow the coolant in the immersion liquid cooling system to flow through the detection device.

[0011] In an optional manner, the detection device also includes a control circuit board, which is provided with a DC-DC power supply module, a low voltage difference linear voltage regulator module and the control unit; the input end of the DC-DC power supply module is used to be electrically connected to an external power supply to access the power supply, and the output end of the DC-DC power supply module is electrically connected to the input end of the low voltage difference linear voltage regulator module; the output end of the low voltage difference linear voltage regulator module is electrically connected to the control unit, and is used to provide working power to the control unit after stepping down the voltage output by the DC-DC power supply module; the output end of the DC-DC power supply module is also electrically connected to the first pole of the transistor in the power consumption control circuit.

[0012] In an optional manner, the detection device also includes a digital-to-analog conversion module, the input end of the digital-to-analog conversion module is electrically connected to the control unit, and the output end of the digital-to-analog conversion module is electrically connected to the second input end of the voltage follower unit; the control unit is used to obtain the temperature value detected by the temperature detection unit, and control the size of the control voltage connected to the second input end of the voltage follower unit according to the temperature value, including: the control unit is used to obtain the temperature value, and output a control signal to the digital-to-analog conversion module according to the temperature value, so that the digital-to-analog conversion module outputs the control voltage to the second input end of the voltage follower unit according to the received control signal.

[0013] In an optional manner, the control circuit board is also provided with an RC buffer module, wherein the output end of the digital-to-analog conversion module is electrically connected to the second input end of the voltage follower unit, including: the output end of the digital-to-analog conversion module is electrically connected to the input end of the RC buffer module, and the output end of the RC buffer module is electrically connected to the second input end of the voltage follower unit; the digital-to-analog conversion module outputs the control voltage to the second input end of the voltage follower unit according to the received control signal, including: the digital-to-analog conversion module outputs the control voltage to the RC buffer module according to the received control signal, and the control voltage is transmitted to the second input end of the voltage follower unit through the RC buffer module.

[0014] In an optional manner, the detection device includes multiple power consumption control circuits, the control units in the multiple power consumption control circuits are the same control unit, and the temperature detection units in the multiple power consumption control circuits are the same temperature detection unit; the temperature detection unit is used to detect the temperatures of all transistors and all load units in the multiple power consumption control circuits; the control unit controls the size of the control voltage connected to the second input terminal of the voltage follower unit in each of the power consumption control circuits, thereby controlling the size of the current value flowing from the first pole to the second pole and the load unit, so as to control the power consumption generated by all transistors and all load units in the multiple power consumption control circuits.

[0015] In the embodiment of the present application, after the control voltage drives the circuit to work, the power supply connected to the first pole of the transistor provides current and flows to the transistor and the load unit, so that the transistor and the load unit work and generate power consumption, and then the temperature detection unit is used to detect the temperature of the transistor and the load unit, and the control unit controls the magnitude of the control voltage according to the detected temperature value. By controlling the magnitude of the control voltage, the magnitude of the current flowing to the transistor and the load unit can be controlled, thereby controlling the magnitude of the power consumption generated by the transistor and the load unit, so that the power consumption generated by the transistor and the load unit meets the requirements. Therefore, by controlling the power consumption generated by the power consumption control circuit to be as equal as possible to the power consumption generated by the real server, the power consumption control circuit can be used as a dummy load to perform heat dissipation detection on the immersion liquid cooling system, thereby reducing the detection cost.

[0016] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the embodiment of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are only used to illustrate the embodiments and are not to be considered as limiting the present application. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings. In the accompanying drawings:

[0018] Figure 1 A schematic diagram of a power consumption control circuit provided in an embodiment of the present application is shown;

[0019] Figure 2 A schematic diagram of a power consumption control circuit provided by another embodiment of the present application is shown;

[0020] Figure 3 A schematic diagram of the structure of a detection device provided in an embodiment of the present application is shown;

[0021] Figure 4 A schematic diagram of multiple power consumption control circuits provided in an embodiment of the present application is shown;

[0022] Figure 5 A schematic diagram of a control circuit board provided in an embodiment of the present application is shown.

[0023] The reference numerals in the specific implementation manner are as follows:

[0024] 10. Power consumption control circuit; 110. Transistor; 120. Load unit; 130. Voltage follower unit; 140. Control unit; 150. Temperature detection unit; 160. Voltage amplification unit;

[0025] U1, first operational amplifier; U2, second operational amplifier;

[0026] R1, first resistor; R2, second resistor; R3, third resistor;

[0027] 20. Detection device; 21. Housing; 22. Control circuit board; 23. Power input interface; 24. Serial port input interface; 25. Heating simulation module interface; 26. Power cord; 27. I2C bus. DETAILED DESCRIPTION

[0028] The exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0030] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0031] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0032] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0033] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0034] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0035] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0036] With the rapid development of computing-intensive applications such as artificial intelligence and the Internet of Things, the growing computing demand has led data centers to gradually develop towards high performance, high density, and high energy consumption. Improving the efficiency of data center cooling systems and reducing energy consumption are crucial to achieving the "dual carbon" goals. From the perspective of the development of the entire data center industry, liquid cooling is currently a relatively reliable and feasible solution to reduce data center energy consumption, and immersion liquid cooling is the preferred solution among liquid cooling solutions.

[0037] Before the immersion liquid cooling system is delivered and put into use, it needs to be tested for heat dissipation to check whether its heat dissipation function is good. If the heat dissipation test is performed on a real server, if the heat dissipation function of the immersion liquid cooling system to be tested is abnormal, the server used for testing cannot be cooled during the test, which will cause certain losses to the server and the test cost is high.

[0038] Based on this, the inventors of the present application have found that if a dummy load is used to perform heat dissipation detection on the immersion liquid cooling system, and the dummy load is used to simulate the heat generated by the real server, the detection cost can be reduced. The inventors of the present application noticed that if a heating rod dummy load is used to perform heat dissipation detection on the immersion liquid cooling system, since the heating rod is mainly composed of a stainless steel shell and a resistance wire, the surface temperature of the heating rod is usually between 120°C and 180°C when the heating rod is working. During the detection, the heating rod is immersed in the coolant. Due to the high surface temperature of the heating rod, the coolant will evaporate or decompose, causing the coolant to deteriorate, causing damage to the immersion liquid cooling system. In addition, the heating rod will be heated unevenly, and local high temperatures are prone to occur, resulting in an inability to simulate the real server well, and the heat dissipation detection effect of the immersion liquid cooling system is not good.

[0039] Based on the above considerations, the present application provides a power consumption control circuit, which includes a transistor, a load unit, a voltage follower unit, a temperature detection unit and a control unit. In the power consumption control circuit, most of the power consumption and heat are generated by the transistor and the load unit. The temperature detection unit is used to detect the temperature of the transistor and the load unit. The input end of the voltage follower unit is used to receive the control voltage, and the output end of the voltage follower unit is electrically connected to the control electrode of the transistor. The control unit controls the magnitude of the control voltage connected to the voltage follower unit according to the temperature value detected by the temperature detection unit, thereby controlling the magnitude of the current flowing through the transistor and the load unit, thereby controlling the power consumption generated by the transistor and the load unit. By controlling the magnitude of the current flowing through the transistor and the load unit according to the actual power consumption generated by the transistor and the load unit, the power consumption generated by the transistor and the load unit can be controlled, so that the power consumption generated by the transistor and the load unit meets the requirements, and the power consumption control circuit can be used as a dummy load to perform heat dissipation detection on the immersion liquid cooling system.

[0040] The power consumption control circuit disclosed in the embodiment of the present application can be used, but not limited to, for heat dissipation detection of an immersion liquid cooling system, and can also be used in other devices that require a circuit to generate a certain amount of power consumption. The embodiment of the present application only uses the power consumption control circuit to perform heat dissipation detection of an immersion liquid cooling system as an example for explanation, and it cannot be simply considered that the present application is only applicable to heat dissipation detection of an immersion liquid cooling system.

[0041] Figure 1 FIG. 1 is a schematic diagram of a power consumption control circuit provided by an embodiment of the present application. Figure 1As shown, the power consumption control circuit 10 includes a transistor 110, a load unit 120, a voltage follower unit 130, a control unit 140 and a temperature detection unit 150. Among them, the first electrode of the transistor 110 is used to connect to the power supply Vin, the second electrode of the transistor 110 is electrically connected to one end of the load unit 120, and the other end of the load unit 120 is used for grounding. The first input end of the voltage follower unit 130 is connected to the point a between the transistor 110 and the load unit 120, the second input end of the voltage follower unit 130 is used to connect to the control voltage VREF, and the output end of the voltage follower unit is electrically connected to the control electrode of the transistor 110. The temperature detection unit 150 is used to detect the temperature of the transistor 110 and the load unit 120. The control unit 140 is used to obtain the temperature value detected by the temperature detection unit 150, and control the size of the control voltage connected to the second input end of the voltage follower unit 130 according to the temperature value, and control the size of the current value flowing from the first electrode of the transistor 110 to the second electrode of the transistor 110 and the load unit 120 by controlling the size of the control voltage, so as to control the power consumption generated by the transistor 110 and the load unit 120. The arrows in the figure indicate the direction of current flow.

[0042] The transistor 110 may be an N-channel MOS transistor or a full bipolar junction transistor (BJT). If the transistor 110 is an N-channel MOS transistor, the first electrode of the transistor 110 is a drain, the second electrode of the transistor 110 is a source, and the control electrode of the transistor 110 is a gate. The following description is only based on the example that the transistor 110 is an N-channel MOS transistor.

[0043] The load unit 120 can be a load unit with multiple high-power resistors connected in parallel, or a single resistor that can withstand high power, which is not limited here. It is worth noting that the power consumption generated by the transistor 110 is related to the power supply Vin, the voltage at point a, and the current flowing through the transistor 110. The power consumption generated by the load unit 120 is related to the voltage at point a and the current flowing through the load unit 120, and the current flowing through the load unit 120 is related to the power supply Vin and the resistance of the load unit 120. Therefore, the resistance of the power supply Vin and the load unit 120 can be set as needed so that the transistor 110 and the load unit 120 can generate power consumption that meets the requirements.

[0044] The voltage follower unit 130 can be set as needed, as long as the voltage outputted by the output terminal of the voltage follower unit 130 is equal to or approximately equal to the control voltage VREF. The control unit 140 can be a complex programmable logic device (CPLD) or a central processing unit (CPU), etc., as long as the control voltage VREF can be controlled.

[0045] When the transistor 110 and the load unit 120 are working, they will generate a certain amount of power consumption, that is, they will generate a certain amount of heat, that is, the temperature of their surfaces will increase accordingly. Therefore, the temperature detection unit 150 is set near the transistor 110 and the load unit 120, or in contact with the surface of the transistor 110 and the load unit 120, so as to detect the temperature of the transistor 110 and the load unit 120. The temperature detection unit 150 can be a temperature sensor, or other devices that can be used to detect temperature.

[0046] For an N-channel MOS transistor, the MOS transistor is turned on and works only when the voltage between the gate and the source is greater than or equal to the conduction voltage of the MOS transistor, otherwise the MOS transistor is in a closed state. Therefore, after the drain of the transistor 110 is connected to the power supply Vin and one end of the load unit 120 is grounded, if the control voltage VREF is 0 and the voltage output by the voltage follower unit 130 is also 0, the gate voltage of the transistor 110 is 0, and the MOS transistor is in a closed state at this time, and no current flows through the transistor 110 and the load unit 120. The control voltage VREF is controlled and increased by the control unit 140, so that the voltage between the gate and the source of the transistor 110 is greater than or equal to the conduction voltage of the MOS transistor, and then the MOS transistor is in an open state, and the power supply Vin provides current and flows to the transistor 110 and the load unit 120, so that the transistor 110 and the load unit 120 work and generate power consumption and heat.

[0047] If the control voltage VREF is too large, resulting in excessive current flowing to the transistor 110 and the load unit 120, causing the power consumption and heat generated by the transistor 110 and the load unit 120 to exceed the requirements, and the corresponding temperature detection unit 150 detects that the temperature of the transistor 110 and the load unit 120 is high, then the control unit 140 controls and reduces the control voltage VREF according to the obtained larger temperature value to reduce the current flowing to the transistor 110 and the load unit 120, thereby reducing the power consumption generated by the transistor 110 and the load unit 120, so that the power consumption generated by the transistor 110 and the load unit 120 meets the requirements.

[0048] If the control voltage VREF is too small, resulting in the current flowing to the transistor 110 and the load unit 120 being too small, causing the power consumption generated by the transistor 110 and the load unit 120 to fail to meet the requirements, and the corresponding temperature detection unit 150 detects that the temperature of the transistor 110 and the load unit 120 is relatively low, then the control unit 140 controls and increases the control voltage VREF according to the obtained smaller temperature value to increase the current flowing to the transistor 110 and the load unit 120, thereby increasing the power consumption and heat generated by the transistor 110 and the load unit 120, so that the power consumption generated by the transistor 110 and the load unit 120 meets the requirements.

[0049] In the embodiment of the present application, after the control voltage VREF drives the circuit to work, the power supply Vin provides current and flows to the transistor 110 and the load unit 120, so that the transistor 110 and the load unit 120 work and generate power consumption, and then the temperature detection unit 150 is used to detect the temperature of the transistor 110 and the load unit 120, and the control unit 140 controls the size of VREF according to the detected temperature value. By controlling the size of VREF, the size of the current flowing to the transistor 110 and the load unit 120 can be controlled, thereby controlling the size of the power consumption generated by the transistor 110 and the load unit 120, so that the power consumption generated by the transistor 110 and the load unit 120 meets the requirements. Therefore, by controlling the power consumption generated by the power consumption control circuit 10 to be as equal as possible to the power consumption generated by the real server, the power consumption control circuit 10 can be used as a dummy load to perform heat dissipation detection on the immersion liquid cooling system, thereby reducing the detection cost.

[0050] If the sum of the power consumption generated by the transistor 110 and the load unit 120 is required to be a certain target value, and the theoretical value of the control voltage VREF is determined according to the target value, the control voltage VREF of the theoretical value is directly input to the control electrode of the transistor 110, so that the sum of the power consumption generated by the transistor 110 and the load unit 120 reaches the target value. However, it is understandable that there will be certain errors in the circuit during operation, and even if the control voltage VREF of the theoretical value is input to the control electrode of the transistor 110, the sum of the power consumption generated by the transistor 110 and the load unit 120 may deviate from the target value.

[0051] Therefore, further, in the embodiment of the present application, by using the temperature detection unit 150 to detect the temperature of the transistor 110 and the load unit 120 in real time, the control unit 140 timely adjusts the size of the control voltage VREF according to the temperature value detected by the temperature detection unit 150, that is, the control unit 140 timely adjusts the size of the control voltage VREF according to the sum of the power consumption actually generated by the transistor 110 and the load unit 120, thereby ensuring that the sum of the power consumption actually generated by the transistor 110 and the load unit 120 meets the requirements, and there will be no situation where the sum of the power consumption actually generated by the transistor 110 and the load unit 120 deviates from the target value due to errors in the circuit, thereby improving the detection effect of the heat dissipation detection of the immersion liquid cooling system using the power consumption control circuit 10. Moreover, in the embodiment of the present application, by using the power consumption control circuit 10 to simulate the heat generation of actual components in a real server, it can be closer to the heat generation of actual components, and the effect of simulating heat generation is better.

[0052] In order to improve the stability of the power consumption control circuit 10, in the embodiment of the present application, the voltage follower unit 130 includes a first operational amplifier, the non-inverting input terminal of the first operational amplifier is the first input terminal, and the inverting input terminal of the first operational amplifier is the second input terminal.

[0053] In the embodiment of the present application, the positive input terminal of the first operational amplifier is connected between the transistor 110 and the load unit 120, and the inverting input terminal of the first operational amplifier is used to access the control voltage VREF, so that the transistor 110, the load unit 120 and the first operational amplifier form a stable loop, and the loop has a feedback mechanism. After the circuit system is stable, the voltage at the positive input terminal of the first operational amplifier is equal to the control voltage VREF input at the negative input terminal. The control voltage VREF input at the negative input terminal of the first operational amplifier and the power supply Vin are known, so the voltage between the transistor 110 and the load unit 120 is known, and then the actual power consumption generated by the transistor 110 and the load unit 120 can be calculated respectively.

[0054] In order to improve the stability of the voltage follower unit 130, based on the above-mentioned embodiment, in the embodiment of the present application, the voltage follower unit 130 further includes a first resistor, one end of the first resistor is electrically connected to the non-inverting input terminal of the first operational amplifier, and the other end of the first resistor is electrically connected to the output terminal of the first operational amplifier. By setting the first resistor, the first operational amplifier can be protected to prevent excessive current from passing through the first operational amplifier, and ensure that the voltage output by the output terminal of the first operational amplifier is equal to the control voltage VREF input to its inverting input terminal.

[0055] In order to facilitate the control of the power consumption control circuit 10 by controlling the voltage VREF, Figure 2FIG. 2 is a schematic diagram of a power consumption control circuit provided by another embodiment of the present application. Figure 2 As shown, the voltage follower unit 130 includes a first operational amplifier U1 and a first resistor R1, and the power consumption control circuit 10 also includes a voltage amplification unit 160, and the voltage amplification unit 160 includes a second operational amplifier U2, a second resistor R2 and a third resistor R3. The negative phase input terminal of the second operational amplifier U2 is connected between the transistor 110 and the load unit 120, the positive phase input terminal of the second operational amplifier U2 is electrically connected to one end of the second resistor R2 and one end of the third resistor R3, respectively, the other end of the second resistor R2 is used for grounding, and the output terminal of the second operational amplifier U2 is electrically connected to the positive phase input terminal of the first operational amplifier U1 and the other end of the third resistor R3, respectively. Among them, the voltage amplification unit 160 is used to amplify the input voltage and then output it.

[0056] When the power consumption control circuit 10 is stable, based on the characteristics of the first operational amplifier U1, the voltage of its non-inverting input is equal to the voltage of its inverting input. Since the voltage at point a between the transistor 110 and the load unit 120 is small, if it is directly input to the non-inverting input terminal of the first operational amplifier U1, a small control voltage VREF is required to match it.

[0057] Therefore, in view of the above situation, in order to be able to directly input the voltage output by the power module as the control voltage VREF to the negative phase input terminal of the first operational amplifier U1, without stepping down the voltage output by the power module before inputting it to the negative phase input terminal of the first operational amplifier U1. In the embodiment of the present application, by using the voltage amplification unit 160 to amplify the voltage at point a and then input it to the positive phase input terminal of the first operational amplifier U1, the voltage output by the power module can be directly used as the control voltage VREF to be input to the negative phase input terminal of the first operational amplifier U1.

[0058] It should be noted that, in the embodiment of the present application, the voltage amplification unit 160 amplifies the voltage at point a by a multiple of the resistance of the third resistor R3 to the resistance of the second resistor R2. The resistance of the third resistor R3 and the resistance of the second resistor R2 can be set as needed.

[0059] It is worth noting that the voltage amplification unit 160 can be composed of a second operational amplifier U2, a second resistor R2 and a third resistor R3, and can also be a voltage amplification unit composed of other components. As long as the input end of the voltage amplification unit 160 is connected between the transistor 110 and the load unit 120, and the output end of the voltage amplification unit 160 is electrically connected to the first input end of the voltage follower unit 130, so that the voltage amplification unit 160 can amplify the input point a voltage and output the amplified voltage through its output end, there is no limitation here.

[0060] Figure 3 FIG. 1 is a schematic diagram showing the structure of the detection device provided in the embodiment of the present application. Figure 3 As shown, the detection device 20 includes a housing 21 and a plurality of power consumption control circuits 10. The plurality of power consumption control circuits 10 are disposed in the housing 21. The detection device 20 is used to be disposed in an immersion liquid cooling system, and the coolant in the immersion liquid cooling system flows through the detection device 20.

[0061] In the embodiment of the present application, since the power consumption control circuit 10 included in the detection device 20 will generate power consumption close to that generated by a real server, the detection device 20 is disposed in an immersion liquid cooling system, and the coolant in the immersion liquid cooling system is made to flow through the detection device 20. The detection device 20 is used instead of the real server to perform heat dissipation detection on the immersion liquid cooling system, thereby reducing the detection cost.

[0062] Furthermore, if the power consumption generated by a single power consumption control circuit 10 cannot meet the requirements, the embodiment of the present application sets multiple power consumption control circuits 10 so that the power consumption generated by all the power consumption control circuits 10 meets the requirements. Since each power consumption control circuit 10 includes a control unit 140, the multiple power consumption control circuits 10 work independently of each other, so the total power consumption generated by the multiple power consumption control circuits 10 can be flexibly controlled in the embodiment of the present application.

[0063] It is worth noting that in the embodiments of the present application, only the detection device 20 including multiple power consumption control circuits 10 is used as an example for description. In some embodiments, the detection device 20 may also include only one power consumption control circuit 10, which is not limited here.

[0064] It should be noted that the power consumption control circuit 10 in the detection device 20 may be the power consumption control circuit 10 provided by any of the above embodiments, which is not limited here.

[0065] In order to provide power Vin for the first pole of the transistor 110 and provide working power for the control unit 140, in the embodiment of the present application, the detection device 20 also includes a control circuit board, which is provided with a direct current-direct current (DC-DC) power supply module, a low dropout voltage regulator (Low Drop Out Voltage Regulator, LDO) module and a control unit 140. The input end of the DC-DC power supply module is used to be electrically connected to an external power supply to access the power supply, and the output end of the DC-DC power supply module is electrically connected to the input end of the LDO module. The output end of the LDO module is electrically connected to the control unit 140, and is used to provide working power to the control unit 140 after the voltage output by the DC-DC power supply module is stepped down. The output end of the DC-DC power supply module is also electrically connected to the first pole of the transistor 110 in the power consumption control circuit 10 to provide power Vin for the first pole of the transistor 110.

[0066] As described above, the control unit 140 can be a CPLD or a CPU. Therefore, in the embodiment of the present application, after the DC-DC power supply module is connected to the 12V voltage, the 12V voltage is stepped down to obtain a 5V voltage, thereby providing a 5V Vin for the first pole of the transistor 110. After the LDO module receives the 5V voltage output by the DC-DC power supply module, it steps down and obtains a 3.3V voltage, thereby providing a 3.3V working power supply for the CPLD. In the embodiment of the present application, by arranging a control circuit board in the detection device 20, the power supply Vin can be provided for the first pole of the transistor 110 and the working power supply can be provided for the control unit 140 at the same time, thereby improving the integration of the detection device 20.

[0067] In order to further improve the integration of the detection device 20, based on the aforementioned embodiments, in the embodiment of the present application, the detection device 20 also includes a digital-to-analog (DA) conversion module, the input end of the DA module is electrically connected to the control unit 140, and the output end of the DA module is electrically connected to the second input end of the voltage follower unit 130.

[0068] The control unit 140 is used to obtain the temperature value detected by the temperature detection unit 150 and control the magnitude of the control voltage according to the temperature value, including:

[0069] The control unit 140 is used to obtain a temperature value, and output a control signal to the DA module according to the temperature value, so that the DA module outputs a control voltage to the second input terminal of the voltage follower unit 130 according to the received control signal.

[0070] In the embodiment of the present application, after the control unit 140 obtains the temperature value detected by the temperature detection unit 150, it sends a control signal to the DA module according to the obtained temperature value, so that the DA module performs digital-to-analog conversion after receiving the control signal and then outputs the control voltage VREF to the second input terminal of the voltage follower unit 130. There is no need to connect the control voltage VREF from an external power supply, thereby further improving the integration of the detection device 20.

[0071] In order to provide a stable control voltage VREF to the second input terminal of the voltage follower unit 130 , based on the above-mentioned embodiment, in the embodiment of the present application, the control circuit board is further provided with a resistor-capacitor (RC) buffer module.

[0072] The output end of the DA module is electrically connected to the second input end of the voltage follower unit 130 , including: the output end of the DA module is electrically connected to the input end of the RC buffer module, and the output end of the RC buffer module is electrically connected to the second input end of the voltage follower unit 130 .

[0073] The DA module outputs a control voltage to the second input terminal of the voltage follower unit 130 according to the received control signal, including: the DA module outputs a control voltage VREF to the RC buffer module according to the received control signal, and the control voltage VREF is transmitted to the second input terminal of the voltage follower unit 130 through the RC buffer module.

[0074] In the embodiment of the present application, by setting up an RC buffer module, the control voltage VREF can be changed slowly, and the temperature of the transistor 110 and the load unit 120 in the power consumption control circuit 10 can be controlled to rise slowly, thereby preventing the temperature from rising too quickly and causing the temperature of the local area of ​​the coolant flowing through the power consumption control circuit 10 to be too high or the coolant to deteriorate.

[0075] In order to further improve the detection effect of the immersion liquid cooling system to be detected, in the embodiment of the present application, the detection device 20 includes multiple power consumption control circuits 10, the control units 140 in the multiple power consumption control circuits 10 are the same control unit 140, and the temperature detection units 150 in the multiple power consumption control circuits 10 are the same temperature detection unit 150. The temperature detection unit 150 is used to detect the temperature of all transistors 110 and all load units 120 in the multiple power consumption control circuits 10. The control unit 140 controls the magnitude of the control voltage VREF connected to the second input terminal of the voltage follower unit 130 in each power consumption control circuit 10, and controls the magnitude of the current value flowing from the first pole of each transistor 110 to the second pole and the corresponding load unit 120, so as to control the power consumption generated by all transistors 110 and all load units 120 in the multiple power consumption control circuits 10.

[0076] Here, in order to better introduce the multiple power consumption control circuits 10 included in the detection device 20, Figure 4 FIG. 1 is a schematic diagram of multiple power consumption control circuits provided in an embodiment of the present application. Figure 4 As shown, the detection device 20 includes n load circuits in total, wherein the load circuit refers to a local circuit composed of the transistor 110, the load unit 120 and the voltage follower unit 130 in the power consumption control circuit 10. The first electrode of the transistor 110 in each load circuit is connected to the same power supply Vin.

[0077] In the embodiment of the present application, if the power consumption generated by a power consumption control circuit 10 cannot meet the requirement, multiple power consumption control circuits 10 can be used to make the power consumption generated by the multiple power consumption control circuits 10 meet the requirement, so that the immersion liquid cooling system can be tested on behalf of the real server. For example, if a load circuit can generate 25W of power consumption, and the hard disk in the real server actually generates 350W of power consumption when working, 14 groups of load circuits can be connected in parallel, so that the 14 groups of load circuits can also generate 350W of power consumption, so that they can be used to simulate the hard disk in the real server, so as to replace the hard disk in the real server to test the immersion liquid cooling system to be tested.

[0078] It is understandable that different positions of a real server usually include multiple heat sources. Therefore, in order to improve the effect of heat dissipation detection of the immersion liquid cooling system using the detection device, in some embodiments, power consumption control circuits 10 are correspondingly set at different positions of the detection device 20, so that the sum of the power consumption generated by the power consumption control circuits 10 set at the corresponding positions of the detection device 20 corresponds to the heat sources of the real server. For example, the key heat-generating components in a real server are mainly CPUs and hard disks, which usually include 2 CPUs and 14 hard disks. The power consumption of a CPU is 350W, and the power consumption of a hard disk is 25W. Therefore, corresponding heat simulation modules can be set in the positions corresponding to each CPU in the real server in the detection device 20, and each heat simulation module includes the following. Figure 4 The 14 groups of load circuits shown are provided with corresponding heating simulation modules at positions corresponding to the hard disks in the real server in the detection device 20, and each heating simulation module includes a group of power consumption control circuits.

[0079] In order to better introduce the control circuit board in the detection device 20, Figure 5 FIG. 1 is a schematic diagram of a control circuit board provided in an embodiment of the present application. Figure 5As shown, the control unit 140 in the control circuit board 22 in the detection device 20 is a CPLD, and the control signals and power supplies of all heating simulation modules are provided by the control circuit board. The control circuit board 22 includes a CPLD, a power input interface 23, a serial port input interface 24, and a heating simulation module interface 25, etc., for unified power management and signal control. The power input interface 23 is connected to the AC-DC power conversion module through a power line to introduce a 12V power supply. The serial port input interface 24 is connected to the serial port socket outside the shell through a cable to introduce a computer control signal. The number of heating simulation module interfaces 25 corresponds to the heating simulation module, which is connected to each heating simulation module to provide it with power Vin, control voltage VREF and receive the temperature value fed back by the temperature detection unit 150. There are heating simulation module interfaces 25 in both the heating simulation module and the control circuit board 22, and the two interfaces are defined in the same way, and are connected to each other through a cable. The heating simulation module interface 25 has corresponding pin definitions, including definitions of power Vin, control voltage VREF, temperature feedback signal, etc.

[0080] The main function of the control circuit board 22 is power distribution and signal control. The power distribution part is as follows: the power input interface 23 receives the 12V voltage output from the alternating current-direct current (AC-DC) power module, and steps it down through the DC-DC power module to obtain a 5V voltage, which is used as the input voltage of all heating simulation modules, namely Vin. The DC-DC power module transmits the input voltage Vin to the heating simulation module interface 25 in the control circuit board 22 through the power line 26, so that each heating simulation module can access the input voltage Vin through the heating simulation module interface 25. The LDO steps down the power output by the DC-DC power module to obtain a 3.3V power supply to provide working power for the CPLD.

[0081] The control voltage of the load circuit of the hard disk heating simulation module and the CPU heating simulation module is VREF. The voltage change of VREF can adjust the current passing through the transistor 110 and the load unit 120 in the load circuit, thereby changing the power consumption and heat generated by the load circuit, that is, adjusting the temperature of the heating simulation module. The CPLD controls the voltage output of the DA module. After the control voltage VREF output by the DA module is buffered by the RC buffer module, the control voltage VREF is output to the corresponding hard disk heating simulation module and the CPU heating simulation module through the heating simulation module interface 25. The corresponding hard disk heating simulation module and the CPU heating simulation module are connected to the control voltage VREF to drive the load circuit to work, and the current flows through the transistor 110 and the load unit 120, thereby simulating the heating of the hard disk and the CPU in the actual server.

[0082] CPLD is the core control device of the control circuit board 22. The interface for communicating with the computer upward adopts an asynchronous bidirectional serial port RS232, so that the computer can send control instructions to the control board to control the power and other parameters of each heating simulation module, and the computer can obtain the temperature information detected by the CPLD through each temperature detection unit 150. The control circuit board 22 is provided with multiple interfaces for the CPLD to communicate downward with each heating simulation module, and each interface contains an I2C signal collected by the temperature detection unit 150, a heating power control signal, a power supply signal, a position signal, etc. After the temperature detection unit 150 in the power consumption control circuit 10 detects the temperature of the transistor 110 and the load unit 120, it is transmitted to the CPLD through the I2C bus 27.

[0083] CPLD includes Universal Asynchronous Receiver / Transmitter (UART) module, message encapsulation module, message parsing module, register control module, heating controller module, etc. The main function of the UART transceiver control module is to complete the serial-to-parallel conversion of received data and the parallel-to-serial conversion of sent data; the main function of the message parsing module is to complete the instruction parsing of received data, strip the message header and message tail in the message, and output the instructions sent by the computer; the main function of the message encapsulation module is to encapsulate the data to be uploaded to the computer, add the message header and message tail; the main function of the register control module is to store and control the register table, which is used to record the sensor information and heating power control instructions of each heating simulation module.

[0084] After the data received from the RS323 serial port completes the serial-to-parallel conversion in the UART transceiver control module, the parallel data enters the message parsing module, parses the instructions sent by the computer, and then passes the instructions to the register control module for storage. Each heating control module detects the control instructions and executes the corresponding control.

[0085] The temperature data collected by each heating simulation module is initiated by the heating controller module to read the I2C bus data request, and the read temperature data is passed to the register control module for storage. After receiving the temperature data read request from the host computer (computer), the data is passed to the message encapsulation module for message encapsulation. Finally, the message UART transceiver control module completes the parallel-to-serial conversion and sends it to the computer through the RS232 bus.

[0086] In the description provided herein, a large number of specific details are described. However, it is understood that the embodiments of the present application can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0087] Similarly, it should be understood that in order to streamline the present application and aid in understanding one or more of the various inventive aspects, in the above description of the exemplary embodiments of the present application, the various features of the embodiments of the present application are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting the following intention: that the claimed application requires more features than those explicitly recited in each claim.

[0088] Those skilled in the art will appreciate that the modules in the devices in the embodiments may be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments may be combined into one module or unit or component, and may be divided into a plurality of submodules or subunits or subcomponents. Except that at least some of such features and / or processes or units are mutually exclusive, all features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this manner may be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0089] It should be noted that the above embodiments illustrate the present application rather than limit the present application, and that those skilled in the art may design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets should not be constructed as a limitation to the claims. The word "comprising" does not exclude the presence of elements not listed in the claims. The word "one" or "an" preceding an element does not exclude the presence of multiple such elements. The present application may be implemented by means of hardware including several different elements and by means of a suitably programmed computer. In a unit claim that lists several devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order. These words may be interpreted as names.

Claims

1. A power consumption control circuit, characterized in that: It includes a transistor, a load unit, a voltage follower unit, a control unit and a temperature detection unit, wherein: The first electrode of the transistor is used to connect to a power source, the second electrode of the transistor is electrically connected to one end of the load unit, and the other end of the load unit is used to be grounded; The first input terminal of the voltage follower unit is connected between the transistor and the load unit, the second input terminal of the voltage follower unit is used to access the control voltage, and the output terminal of the voltage follower unit is electrically connected to the control electrode of the transistor; The temperature detection unit is used to detect the temperature of the transistor and the load unit; The control unit is used to obtain the temperature value detected by the temperature detection unit, and control the size of the control voltage connected to the second input terminal of the voltage follower unit according to the temperature value, and control the size of the current flowing from the first pole to the second pole and the load unit by controlling the size of the control voltage, so as to control the power consumption generated by the transistor and the load unit.

2. The power consumption control circuit according to claim 1, characterized in that: The voltage follower unit includes a first operational amplifier, a non-inverting input terminal of the first operational amplifier is the first input terminal, and an inverting input terminal of the first operational amplifier is the second input terminal.

3. The power consumption control circuit according to claim 2, characterized in that: The voltage follower unit further includes a first resistor, one end of which is electrically connected to the non-inverting input end, and the other end of which is electrically connected to the output end of the first operational amplifier.

4. The power consumption control circuit according to claim 1, characterized in that: The circuit further comprises a voltage amplifying unit, an input end of the amplifying unit is connected between the transistor and the load unit, and an output end of the amplifying unit is electrically connected to a first input end of the voltage follower unit.

5. The power consumption control circuit according to claim 4, characterized in that: The voltage amplification unit includes a second operational amplifier, a second resistor and a third resistor; The negative phase input terminal of the second operational amplifier is connected between the transistor and the load unit, the positive phase input terminal of the second operational amplifier is electrically connected to one end of the second resistor and one end of the third resistor respectively, the other end of the second resistor is used for grounding, and the output terminal of the second operational amplifier is electrically connected to the first input terminal of the voltage follower unit and the other end of the third resistor respectively.

6. A detection device for performing heat dissipation detection on an immersion liquid cooling system, characterized in that: The detection device includes a housing and a power consumption control circuit as described in any one of claims 1 to 5, wherein the power consumption control circuit is arranged in the housing, and the detection device is used to be arranged in an immersion liquid cooling system, and the coolant in the immersion liquid cooling system flows through the detection device.

7. The detection device according to claim 6, characterized in that: The detection device also includes a control circuit board, which is provided with a DC-DC power supply module, a low voltage difference linear voltage regulator module and the control unit; The input end of the DC-DC power supply module is used to be electrically connected to an external power supply to access the power supply, and the output end of the DC-DC power supply module is electrically connected to the input end of the low voltage difference linear voltage regulator module; The output end of the low voltage difference linear voltage regulator module is electrically connected to the control unit, and is used to provide working power to the control unit after stepping down the voltage output by the DC-DC power supply module; The output end of the DC-DC power supply module is also electrically connected to the first electrode of the transistor in the power consumption control circuit.

8. The detection device according to claim 7, characterized in that: The detection device further comprises a digital-to-analog conversion module, an input end of the digital-to-analog conversion module is electrically connected to the control unit, and an output end of the digital-to-analog conversion module is electrically connected to the second input end of the voltage follower unit; The control unit is used to obtain the temperature value detected by the temperature detection unit, and control the magnitude of the control voltage connected to the second input terminal of the voltage follower unit according to the temperature value, including: The control unit is used to obtain the temperature value and output a control signal to the digital-to-analog conversion module according to the temperature value, so that the digital-to-analog conversion module outputs the control voltage to the second input terminal of the voltage follower unit according to the received control signal.

9. The detection device according to claim 8, characterized in that: The control circuit board is also provided with an RC buffer module, wherein: The output end of the digital-to-analog conversion module is electrically connected to the second input end of the voltage follower unit, comprising: The output end of the digital-to-analog conversion module is electrically connected to the input end of the RC buffer module, and the output end of the RC buffer module is electrically connected to the second input end of the voltage follower unit; The digital-to-analog conversion module outputs the control voltage to the second input terminal of the voltage follower unit according to the received control signal, including: The digital-to-analog conversion module outputs a control voltage to the RC buffer module according to the received control signal, and the control voltage is transmitted to the second input terminal of the voltage follower unit through the RC buffer module.

10. The detection device according to claim 6, characterized in that: The detection device comprises a plurality of the power consumption control circuits, the control units in the plurality of the power consumption control circuits are the same control unit, and the temperature detection units in the plurality of the power consumption control circuits are the same temperature detection unit; The temperature detection unit is used to detect the temperatures of all transistors and all load units in the plurality of power consumption control circuits; The control unit controls the magnitude of the control voltage connected to the second input terminal of the voltage follower unit in each of the power consumption control circuits, thereby controlling the magnitude of the current flowing from the first pole to the second pole and the load unit, so as to control the power consumption generated by all transistors and all load units in the multiple power consumption control circuits.

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