Cooling fan circuit and cooling fan

Abstract

The utility model provides a cooling fan circuit and a cooling fan, the cooling fan circuit comprises a first fan circuit and a second fan circuit, and the first fan circuit and the second fan circuit are connected in parallel; wherein the first fan circuit is used for providing a first driving voltage for the heat dissipation fan, so that the heat dissipation fan reaches a first heat dissipation rotating speed; and the second fan circuit is used for providing a second driving voltage for the cooling fan, so that the cooling fan reaches a second cooling rotating speed. Different driving voltages can be provided for the cooling fan through different fan circuits, so that the cooling fan can reach different cooling rotating speeds, the self-adaptive cooling function of the cooling fan is realized, and the energy consumption of the cooling fan is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a heat dissipation fan circuit and a heat dissipation fan. Background Art

[0002] Electronic devices such as laptops typically use cooling fans to lower their operating temperatures, ensuring optimal performance. When performing complex calculations, high-voltage fans are often required to achieve optimal heat dissipation. However, high-voltage fans consume significant power both during startup and during operation, reducing the battery life of the device. Utility Model Content

[0003] The utility model provides a heat dissipation fan circuit and a heat dissipation fan, so as to at least solve the above technical problems existing in the prior art.

[0004] According to a first aspect of the present invention, a heat dissipation fan circuit is provided, wherein the heat dissipation fan circuit comprises a first fan circuit and a second fan circuit, wherein the first fan circuit and the second fan circuit are connected in parallel;

[0005] The first fan circuit is used to provide a first driving voltage for the cooling fan, so that the cooling fan reaches a first cooling speed;

[0006] The second fan circuit is used to provide a second driving voltage for the heat dissipation fan, so that the heat dissipation fan reaches a second heat dissipation speed.

[0007] In one embodiment, the first fan circuit includes a first signal receiver and a first transistor, and the second fan circuit includes a second signal receiver and a second transistor; the first signal receiver is connected to the first transistor via a wire, and the second signal receiver is connected to the second transistor via a wire.

[0008] In one embodiment, the first signal receiver is used to adjust the state of the first transistor to the off state when receiving the first voltage signal; the second signal receiver is used to adjust the state of the second transistor to the off state when receiving the first voltage signal.

[0009] In one embodiment, the first signal receiver is used to adjust the state of the first transistor to a closed state when receiving a second voltage signal; the second signal receiver is used to adjust the state of the second transistor to a closed state when receiving a second voltage signal.

[0010] In one embodiment, the first fan circuit further includes a third transistor, which is connected to the first transistor and is configured to conduct the first driving current when the first transistor and the second transistor are in an off state.

[0011] In one embodiment, the second fan circuit further includes a fourth transistor, which is connected to the second transistor and is configured to conduct the second driving current when the first transistor and the second transistor are in a closed state.

[0012] In one embodiment, the second driving voltage is greater than the first driving voltage.

[0013] In one embodiment, the second fan circuit further includes a boost circuit connected in series with the fourth transistor, and configured to boost the voltage of the second fan circuit when the fourth transistor conducts the second drive current, so that the voltage of the second fan circuit reaches the second drive voltage.

[0014] In one embodiment, the boost circuit includes a boost chip and a boost inductor, and the boost chip is connected in parallel with the boost inductor; the boost chip is used to boost the current voltage of the second fan circuit to a second driving voltage, and the boost inductor is used to stabilize the output voltage of the second fan circuit.

[0015] According to a second aspect of the present invention, a heat dissipation fan is provided, comprising the heat dissipation fan circuit as described above.

[0016] The cooling fan circuit of the present invention includes a first fan circuit and a second fan circuit, the first fan circuit and the second fan circuit being connected in parallel. The first fan circuit is configured to provide a first drive voltage to the cooling fan, thereby enabling the cooling fan to reach a first cooling speed; the second fan circuit is configured to provide a second drive voltage to the cooling fan, thereby enabling the cooling fan to reach a second cooling speed. The present invention utilizes different fan circuits to provide different drive voltages to the cooling fan, thereby enabling the cooling fan to reach different cooling speeds. This achieves an adaptive cooling function for the cooling fan and reduces the cooling fan's energy consumption.

[0017] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood by reading the detailed description below with reference to the accompanying drawings. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, in which:

[0019] In the drawings, the same or corresponding reference numerals denote the same or corresponding parts.

[0020] Figure 1 The figure shows the structure of the heat dissipation fan circuit according to the embodiment of the present invention;

[0021] Figure 2 The figure shows a schematic diagram of the composition structure of the heat dissipation fan according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0022] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0023] Figure 1 Schematic diagram of the structure of the cooling fan circuit 10 provided in the embodiment of the present utility model. Figure 1 As shown, the heat dissipation fan circuit 10 includes a first fan circuit 101 and a second fan circuit 102, wherein the first fan circuit 101 and the second fan circuit 102 are connected in parallel;

[0024] The first fan circuit 101 is used to provide a first driving voltage to the cooling fan so that the cooling fan reaches a first cooling speed;

[0025] The second fan circuit 102 is configured to provide a second driving voltage to the cooling fan, so as to enable the cooling fan to reach a second cooling speed.

[0026] In the embodiment of the present application, the cooling fan circuit 10 includes two circuits connected in parallel: a first fan circuit 101 and a second fan circuit 102. The first fan circuit 101 and the second fan circuit correspond to two different voltage circuits, respectively. Specifically, the first fan circuit 101 corresponds to a first drive voltage circuit, and the first drive voltage is generally 5V (refer to Figure 1 The second fan circuit 102 corresponds to the second drive voltage circuit, and the second drive voltage is usually 12V (reference Figure 1The first driving voltage can drive the cooling fan to a first cooling speed, and the second driving voltage can drive the cooling fan to a second cooling speed. The first cooling speed is lower than the second cooling speed, and thus the cooling performance brought by the first cooling speed is lower than the cooling performance brought by the second cooling speed. That is to say, the two fan circuits of the cooling fan circuit 10 in the embodiment of the present application can provide different cooling performances for the cooling fan, thereby enabling the cooling fan (such as Figure 1 The FAN in the circuit adaptively selects the two fan circuits according to the current temperature of the electronic device to perform heat dissipation according to their corresponding heat dissipation performance. This can avoid the problem of excessive energy consumption caused by blindly using high-voltage fan circuits, and also prevent the problem of insufficient heat dissipation performance caused by blindly using low-voltage fan circuits.

[0027] In one embodiment, the first fan circuit 101 includes a first signal receiver 1011 and a first transistor Q2, and the second fan circuit 102 includes a second signal receiver 1021 and a second transistor Q4; the first signal receiver 1011 is connected to the first transistor Q2 via a wire, and the second signal receiver 1021 is connected to the second transistor Q4 via a wire.

[0028] refer to Figure 1 As shown, the first fan circuit 101 includes a first signal receiver 1011 and a first transistor Q2, and the second fan circuit 102 includes a second signal receiver 1021 and a second transistor Q4. The first signal receiver 1011 is connected to the first transistor Q2 via a wire, and the second signal receiver 1021 is connected to the second transistor Q4 via a wire. For example, in a scenario where the electronic device is a laptop computer, the laptop's embedded controller (EC) obtains the laptop's current body temperature and generates a voltage signal. The first signal receiver 1011 and the second signal receiver 1021 simultaneously receive the voltage signals generated by the EC and control the opening or closing of the first transistor Q2 and the second transistor Q4 based on the voltage signals.

[0029] In one embodiment, the first signal receiver 1011 is used to adjust the state of the first transistor Q2 to the off state when receiving the first voltage signal; the second signal receiver 1021 is used to adjust the state of the second transistor Q4 to the off state when receiving the first voltage signal.

[0030] In the embodiment of the present application, as described above, the voltage signal provided by the laptop computer's EC includes two types of signals: a first voltage signal: a high voltage signal; and a second voltage signal: a low voltage signal. The first voltage signal is the low voltage signal. The first signal receiver 1011 and the second signal receiver 1021 simultaneously receive the signals provided by the EC. When the first signal receiver 1011 and the second signal receiver 1021 receive the first voltage signal, the first signal receiver 1011 and the second signal receiver 1021 respectively adjust the states of the first transistor Q2 and the second transistor Q4 to the off state.

[0031] In one embodiment, the first signal receiver 1011 is used to adjust the state of the first transistor Q2 to a closed state when receiving the second voltage signal; the second signal receiver 1021 is used to adjust the state of the second transistor Q4 to a closed state when receiving the second voltage signal.

[0032] In the embodiment of the present application, as described above, the second voltage signal is a high voltage signal. When the first signal receiver 1011 and the second signal receiver 1021 receive the second voltage signal, the first signal receiver 1011 and the second signal receiver 1021 adjust the states of the first transistor Q2 and the second transistor Q4 to a closed state, respectively.

[0033] In one embodiment, the first fan circuit 101 further includes a third transistor Q1 , which is connected to the first transistor Q2 and configured to conduct the first driving current when the first transistor Q2 and the second transistor Q4 are in an off state.

[0034] In the embodiment of this application, Figure 1 As shown, the first fan circuit 101 further includes a third transistor Q1, which is connected to the first transistor Q2. In the embodiment of the present application, the third transistor Q1 is a metal oxide semiconductor field effect transistor (MOSFET). According to the principle of MOSFET, when the first transistor Q2 and the second transistor Q4 are in the off state, the third transistor Q1 is in the on state, and current flows sequentially through point A and the third transistor Q1 to form the first drive current.

[0035] In one embodiment, the second fan circuit 102 further includes a fourth transistor Q3 , which is connected to the second transistor Q4 and configured to conduct the second driving current when the first transistor Q2 and the second transistor Q4 are in a closed state.

[0036] In the embodiment of this application, Figure 1As shown, the second fan circuit 102 further includes a fourth transistor Q3, which is connected to the second transistor Q4. In this embodiment of the present application, the fourth transistor Q3 is a metal oxide semiconductor field effect transistor (MOSFET). According to the principles of MOSFETs, when the first transistor Q2 and the second transistor Q4 are in the closed state, the fourth transistor Q3 is in the on state, and current flows sequentially through point A and the fourth transistor Q3 to form a second drive current.

[0037] In one embodiment, the second driving voltage is greater than the first driving voltage.

[0038] In the embodiment of the present application, as mentioned above, the first driving voltage is usually 5 V, and the second driving voltage is usually 12 V. That is, the second driving voltage is greater than the first driving voltage.

[0039] In one embodiment, the second fan circuit 102 further includes a boost circuit 1022 connected in series with the fourth transistor Q3 for boosting the voltage of the second fan circuit 102 when the fourth transistor Q3 conducts the second drive current, so that the voltage of the second fan circuit 102 reaches the second drive voltage.

[0040] In the embodiment of this application, Figure 1 As shown, the second fan circuit 102 further includes a boost circuit 1022, which is connected in series with the fourth transistor Q3. Since the second driving voltage is relatively large, when the fourth transistor Q3 conducts the second driving current, the second fan circuit 102 is boosted by the boost circuit 1022, so that the voltage of the second fan circuit 102 is increased to the second driving voltage.

[0041] In one embodiment, the boost circuit 1022 includes a boost chip IC1 and a boost inductor L1, and the boost chip IC1 is connected in parallel with the boost inductor L1; the boost chip IC1 is used to boost the current voltage of the second fan circuit 102 to a second driving voltage, and the boost inductor L1 is used to stabilize the output voltage of the second fan circuit 102.

[0042] In the embodiment of this application, Figure 1 As shown, the boost circuit 1022 includes a boost chip IC1 and a boost inductor L1, which are connected in parallel. The boost chip IC1 is used to boost the current voltage of the second fan circuit 102 to the second drive voltage, and the boost inductor L1 is used to stabilize the output voltage of the second fan circuit 102. In other words, the boost chip IC1 and the boost inductor L1 are used together to stably boost the voltage of the second fan circuit 102 to the second drive voltage.

[0043] Figure 2This is a schematic diagram of the structure of a heat dissipation fan 11 provided in an embodiment of the present invention. The heat dissipation fan 11 includes the heat dissipation fan circuit 10 as described above.

[0044] In the embodiment of the present application, the composition structure of the cooling fan 11 is as follows Figure 2 As shown, the heat dissipation fan 11 includes a heat dissipation fan circuit 10 , which can realize an adaptive heat dissipation function under the action of the heat dissipation fan circuit 10 , thereby reducing the energy consumption of the heat dissipation fan 11 .

[0045] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in this utility model can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution disclosed in this utility model can be achieved. This is not limited herein.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0047] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A cooling fan circuit, characterized in that: The heat dissipation fan circuit includes a first fan circuit and a second fan circuit, wherein the first fan circuit and the second fan circuit are connected in parallel; wherein, The first fan circuit is used to provide a first driving voltage for the cooling fan, so that the cooling fan reaches a first cooling speed; The second fan circuit is used to provide a second driving voltage for the heat dissipation fan, so that the heat dissipation fan reaches a second heat dissipation speed.

2. The heat dissipation fan circuit according to claim 1, characterized in that: The first fan circuit includes a first signal receiver and a first transistor, and the second fan circuit includes a second signal receiver and a second transistor; the first signal receiver is connected to the first transistor via a wire, and the second signal receiver is connected to the second transistor via a wire.

3. The heat dissipation fan circuit according to claim 2, characterized in that: The first signal receiver is configured to adjust the state of the first transistor to an off state when receiving the first voltage signal; The second signal receiver is configured to adjust the state of the second transistor to an off state upon receiving the first voltage signal.

4. The heat dissipation fan circuit according to claim 2, characterized in that: The first signal receiver is configured to adjust the state of the first transistor to a closed state when receiving the second voltage signal; The second signal receiver is configured to adjust the state of the second transistor to a closed state upon receiving the second voltage signal.

5. The heat dissipation fan circuit according to claim 3, characterized in that: The first fan circuit further includes a third transistor connected to the first transistor and configured to conduct the first driving current when the first transistor and the second transistor are in an off state.

6. The heat dissipation fan circuit according to claim 4, characterized in that: The second fan circuit further includes a fourth transistor connected to the second transistor and configured to conduct a second driving current when the first transistor and the second transistor are in a closed state.

7. The heat dissipation fan circuit according to claim 6, characterized in that: The second driving voltage is greater than the first driving voltage.

8. The heat dissipation fan circuit according to claim 7, characterized in that: The second fan circuit further includes a boost circuit connected in series with the fourth transistor, and configured to boost the voltage of the second fan circuit when the fourth transistor conducts the second drive current, so that the voltage of the second fan circuit reaches the second drive voltage.

9. The heat dissipation fan circuit according to claim 8, characterized in that: The boost circuit includes a boost chip and a boost inductor, the boost chip and the boost inductor are connected in parallel; the boost chip is used to boost the current voltage of the second fan circuit to a second driving voltage, and the boost inductor is used to stabilize the output voltage of the second fan circuit.

10. A cooling fan, characterized in that: The heat dissipation fan comprises the heat dissipation fan circuit according to any one of claims 1 to 9.

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