Isolation fan speed regulation circuit and energy storage air conditioner

Abstract

The utility model provides an isolation fan speed regulation circuit and an energy storage air conditioner. The isolation fan speed regulation circuit is used for the energy storage air conditioner, the energy storage air conditioner comprises an isolation fan and a control panel, the isolation fan speed regulation circuit comprises a motor speed regulation control module, and the motor speed regulation control module is electrically connected with the isolation fan; the first protection module comprises a first optocoupler unit, and the first optocoupler unit is electrically connected with the motor speed regulation control module and the control panel and realizes optoelectronic isolation of the driving signal; and the second protection module comprises a second optical coupling unit, and the second optical coupling unit is electrically connected with the motor speed regulation control module and the control panel and realizes optical isolation of feedback signals. The protection module in the circuit is not only used for isolation of the output circuit, but also used for isolation of the input circuit. And the control panel can be effectively protected by the dual optoelectronic isolation design.

Description

Technical Field

[0001] This application relates to the technical fields of electronic circuits and energy storage air conditioners, and particularly relates to an isolated fan speed control circuit and an energy storage air conditioner. Background Art

[0002] With the development of technology, energy storage air conditioners are used more and more widely. In energy storage air conditioner equipment, the fan is an important component, and its rotation speed directly affects the cooling / heating effect of the air conditioner. Therefore, the speed control of the fan is very important. At the same time, since the operating voltage of the fan is relatively high compared to the control board, corresponding safety measures need to be taken to ensure the safe operation of the equipment.

[0003] Based on this, there is an urgent need in the market to provide an isolated fan speed control circuit and an energy storage air conditioner that avoid direct contact between the high-voltage part of the fan and the control board of the air conditioner. Summary of the Invention

[0004] The purpose of this application is to solve the problem in the prior art that there is a lack of an isolated fan speed control circuit and an energy storage air conditioner suitable for energy storage air conditioners that can avoid direct contact between the high-voltage part of the fan and the control board of the air conditioner.

[0005] To achieve the above purpose, this application adopts the following technical solutions:

[0006] In a first aspect, this application provides an isolated fan speed control circuit for an energy storage air conditioner. The energy storage air conditioner includes an isolated fan and a control board. The isolated fan speed control circuit includes:

[0007] A motor speed control module, which is electrically connected to the isolated fan and is used to drive the isolated fan according to the drive signal of the control board and generate a feedback signal to be sent to the control board;

[0008] A first protection module, which includes a first optocoupler unit. The first optocoupler unit is electrically connected to the motor speed control module and the control board respectively and realizes the optoelectronic isolation of the drive signal;

[0009] A second protection module, which includes a second optocoupler unit. The second optocoupler unit is electrically connected to the motor speed control module and the control board respectively and realizes the optical isolation of the feedback signal.

[0010] In some possible implementation manners, the first optocoupler unit includes a first light-emitting component and a first photosensitive component;

[0011] The first end of the first light-emitting component is connected to a first voltage, and the second end of the first light-emitting component is electrically connected to the drive control end of the control board. The first light-emitting component is configured to convert the drive signal sent by the drive control end into an optical signal;

[0012] The first end of the first photosensitive component is electrically connected to the power supply end of the isolation fan, and the second end of the first photosensitive component is electrically connected to the PWM signal output end of the motor speed control module. The first photosensitive component is configured to establish a conduction path between the power supply end of the isolation fan and the PWM signal output end of the motor speed control module when the first light-emitting component converts the drive signal sent by the drive control end into an optical signal.

[0013] In some possible implementation manners, the first light-emitting component is a light-emitting diode. The first end of the first light-emitting component is the anode of the light-emitting diode, and the second end of the first light-emitting component is the cathode of the light-emitting diode;

[0014] The first photosensitive component is a photosensitive triode. The first end of the first photosensitive component is the collector of the photosensitive triode, and the second end of the first photosensitive component is the emitter of the photosensitive triode.

[0015] In some possible implementation manners, the first protection module further includes a first resistor; the first resistor is disposed between the second end of the first light-emitting component and the drive control end of the control board, and the resistance value of the first resistor is any one of the following: 270Ω, 300Ω, 330Ω, 360Ω, 390Ω, 430Ω, and 470Ω.

[0016] In some possible implementation manners, the second optocoupler unit includes a second resistor, a second light-emitting component, and a second photosensitive component;

[0017] The first end of the second light-emitting component is electrically connected to the feedback output end of the motor speed control module, and the second end of the second light-emitting component is grounded. The second light-emitting component is configured to convert the feedback signal sent by the feedback output end into an optical signal;

[0018] The first end of the second photosensitive component is electrically connected to the feedback receiving end of the control board, and the second end of the second photosensitive component is grounded. The second photosensitive component is configured to establish a conduction path between the first end and the second end of the second photosensitive component when the second light-emitting component converts the feedback signal sent by the feedback output end into an optical signal;

[0019] The first end of the second resistor is electrically connected to the first end of the second photosensitive component, and the second end of the second resistor is connected to a first voltage.

[0020] In some possible implementations, the second protection module further includes a third resistor and a fourth resistor; the first end of the second light-emitting component is also grounded through the fourth resistor, and the second end of the second light-emitting component is grounded through the third resistor.

[0021] In some possible implementations, the second light-emitting component is a light-emitting diode, the first end of the second light-emitting component is the anode of the light-emitting diode, and the second end of the second light-emitting component is the cathode of the light-emitting diode;

[0022] The second photosensitive component is a photosensitive triode, the first end of the second photosensitive component is the collector of the photosensitive triode, and the second end of the second photosensitive component is the emitter of the photosensitive triode.

[0023] In some possible implementations, the resistance value of the second resistor is any one of the following: 10 kΩ, 11 kΩ, 12 kΩ, 13 kΩ, and 15 kΩ.

[0024] In some possible implementations, the resistance value of the third resistor is any one of the following: 2.7 kΩ, 3.3 kΩ, 3.6 kΩ, 3.9 kΩ, and 4.3 kΩ;

[0025] The resistance value of the fourth resistor is any one of the following: 10 kΩ, 11 kΩ, 12 kΩ, 13 kΩ, and 15 kΩ.

[0026] In a second aspect, the present application further provides an energy storage air conditioner, including the isolation fan speed regulation circuit, a control board, and an isolation fan according to any one of the first aspect.

[0027] The beneficial effects brought by the technical solutions provided by the embodiments of the present application are:

[0028] The separately provided optocoupler units are not only used for isolation of the output circuit, but also for isolation of the input circuit. The dual optoelectronic isolation design can effectively protect the control board, thereby reducing risks. The above design takes into account the problem of protecting the control board from high-voltage damage and provides a targeted solution. By avoiding direct connection to the high-voltage part through the first protection module and the second protection module, the stability and safety of the control circuit are improved. Compared with the related art where there is a lack of isolation and the high-voltage part of the fan is directly in contact with the air conditioner control board, which may damage the control circuit board, the speed regulation circuit with dual isolation protection provided in this embodiment protects the control board from directly connecting to the high-voltage part. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present application will be further described below with reference to the drawings and embodiments.

[0030] Figure 1Block diagram of an energy storage air conditioner proposed in this application;

[0031] Figure 2 Schematic diagram of the first protection module of an isolated fan speed control circuit proposed in this application;

[0032] Figure 3 Schematic diagram of the second protection module of an isolated fan speed control circuit proposed in this application.

[0033] Illustration: R1, the first resistor; R2, the second resistor; R3, the third resistor; R4, the fourth resistor; U1, the first optocoupler unit; U2, the second optocoupler unit. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of this application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments.

[0035] Embodiment 1.

[0036] Refer to Figures 1 to 3 , this application embodiment provides an isolated fan speed control circuit for an energy storage air conditioner, and the energy storage air conditioner includes an isolated fan and a control board.

[0037] The isolated fan speed control circuit includes:

[0038] A motor speed control module, which is electrically connected to the isolated fan and is used to drive the isolated fan according to the drive signal of the control board and generate a feedback signal to be sent to the control board;

[0039] A first protection module, the first protection module includes a first optocoupler unit U1, and the first optocoupler unit U1 is electrically connected to the motor speed control module and the control board respectively to realize the optoelectronic isolation of the drive signal;

[0040] A second protection module, the second protection module includes a second optocoupler unit U2, and the second optocoupler unit U2 is electrically connected to the motor speed control module and the control board respectively to realize the optical isolation of the feedback signal.

[0041] The separately provided optocoupler units are not only used for the isolation of the output circuit (of the control board), but also for the isolation of the input circuit. The dual optoelectronic isolation design can effectively protect the control board, thereby reducing risks. The above design takes into account the problem of protecting the control board from high-voltage damage and provides a targeted solution. By avoiding direct connection to the high-voltage part through the first protection module and the second protection module, the stability and safety of the control circuit are improved. Compared with the situation in the related art where there is a lack of isolation and the high-voltage part of the fan is in direct contact with the air-conditioning control board, which may damage the control circuit board, the speed control circuit with dual isolation protection provided in this embodiment protects the control board from directly connecting to the high-voltage part.

[0042] Among them, the motor speed control module is connected to the motor of the isolation fan and receives the drive signal from the control board. It drives the isolation fan and controls the rotation speed of the isolation fan according to the drive signal. The voltage for driving the isolation fan is higher than the first voltage. At the same time, the motor speed control module generates a feedback signal and sends it back to the control board so that the control board can understand the current operating condition of the isolation fan. The first protection module is used to protect the control board from the high-voltage part of the motor speed control module. It includes an optocoupler unit that optically isolates the connection between the control board and the motor speed control module. Even if there is a problem with the high-voltage part generated by the motor speed control module, it will not directly affect the control board. The second protection module is used to protect the control board from the influence of the feedback signal from the motor speed control module. It includes an optocoupler unit that optically isolates the feedback signal and then sends it to the control board, also ensuring that the feedback signal does not transmit any possible high-voltage problems to the control board. In this case, even if there is an electrical fault in the isolation fan part, the control board will not be damaged. Comparatively, the isolation fan is easier to repair than the control board, reducing the difficulty and cost of later repair and maintenance.

[0043] In this application, the motor speed control module can adopt PWM (Pulse Width Modulation) technology to achieve the speed regulation function of the motor (of the isolation fan). By adjusting the duty cycle of the PWM signal, the rotation speed of the motor can be controlled. Adopting the PWM speed regulation method has the advantages of fast response speed and wide adjustment range. It can simultaneously generate a feedback signal, and the width of the pulse of the feedback signal is proportional to the rotation speed of the motor.

[0044] In one embodiment, the first optocoupler unit U1 includes a first light-emitting component and a first photosensitive component;

[0045] The first end of the first light-emitting component is connected to the first voltage, the second end of the first light-emitting component is electrically connected to the drive control end of the control board, and the first light-emitting component is used to convert the drive signal sent by the drive control end into an optical signal;

[0046] The first end of the first photosensitive component is electrically connected to the power supply end of the isolated fan, and the second end of the first photosensitive component is electrically connected to the PWM signal output end of the motor speed control module. The first photosensitive component is used to establish a conduction path between the power supply end of the isolated fan and the PWM signal output end of the motor speed control module when the first light-emitting component converts the drive signal sent by the drive control end into an optical signal.

[0047] The first end of the first light-emitting component is connected to a first voltage, and the second end is electrically connected to the drive control end of the control board. The drive signal from the drive control end is converted into an optical signal. When the drive signal arrives, the first light-emitting component emits an optical signal, and the optical signal is transmitted to the first photosensitive component. When the first light-emitting component emits an optical signal, the first photosensitive component establishes a conduction path between the power supply end of the isolated fan and the PWM signal output end of the motor speed control module. The drive signal sent by the control board can be transmitted to the motor speed control module through the optical signal, thereby controlling the speed of the isolated fan.

[0048] A network label is an electrical connection point, generally composed of letters, symbols, numbers, etc. Electrical connection lines, pins, and networks with the same network label are connected together, and those with different network labels are not connected. This application does not limit the setting of network labels. For example, the network label of the first voltage is +3V3, and the network label of the ground terminal is GND.

[0049] In one embodiment, the first light-emitting component is a light-emitting diode. The first end of the first light-emitting component is the anode of the light-emitting diode, and the second end of the first light-emitting component is the cathode of the light-emitting diode;

[0050] The first photosensitive component is a photosensitive triode. The first end of the first photosensitive component is the collector of the photosensitive triode, and the second end of the first photosensitive component is the emitter of the photosensitive triode.

[0051] The light-emitting diode converts the drive signal into an optical signal, and the photosensitive triode converts the optical signal into an electrical signal. This optoelectronic conversion method has the characteristics of fast speed and high efficiency, and can achieve the high speed and stability of signal transmission, as well as the optoelectronic isolation of the circuit.

[0052] In one embodiment, the first protection module further includes a first resistor R1; the first resistor R1 is disposed between the second end of the first light-emitting component and the drive control end of the control board, and the resistance value of the first resistor R1 is any one of the following: 270Ω, 300Ω, 330Ω, 360Ω, 390Ω, 430Ω, and 470Ω.

[0053] The first resistor R1 is disposed between the second terminal of the first light-emitting component and the drive control terminal of the control board, serving as a current-limiting function to control the current received by the light-emitting diode, ensuring its operation within a safe range, and at the same time, it can also help adjust the sensitivity of the photosensitive triode.

[0054] In one embodiment, the second optocoupler unit U2 includes a second resistor R2, a second light-emitting component, and a second photosensitive component;

[0055] The first terminal of the second light-emitting component is electrically connected to the feedback output terminal of the motor speed control module, the second terminal of the second light-emitting component is grounded, and the second light-emitting component is used to convert the feedback signal sent by the feedback output terminal into an optical signal;

[0056] The first terminal of the second photosensitive component is electrically connected to the feedback receiving terminal of the control board, the second terminal of the second photosensitive component is grounded, and the second photosensitive component is used to establish a conduction path between the first terminal and the second terminal when the second light-emitting component converts the feedback signal sent by the feedback output terminal into an optical signal;

[0057] The first terminal of the second resistor R2 is electrically connected to the first terminal of the second photosensitive component, and the second terminal of the second resistor R2 is connected to a first voltage.

[0058] When the motor speed control module generates a feedback signal, the second light-emitting component converts the feedback signal into an optical signal and sends it to the second photosensitive component. When the second light-emitting component emits an optical signal, the second photosensitive component converts the optical signal into an electrical signal and establishes a conduction path between the first terminal and the second terminal.

[0059] In one embodiment, the second protection module further includes a third resistor R3 and a fourth resistor R4; the first terminal of the second light-emitting component is also grounded through the fourth resistor R4, and the second terminal of the second light-emitting component is grounded through the third resistor R3. By adding the third resistor R3 and the fourth resistor R4, the second protection module further enhances the protection function of the circuit, improves the reliability and stability of the circuit, thereby making the entire isolated fan speed control circuit safer and more reliable.

[0060] In one embodiment, the second light-emitting component is a light-emitting diode, the first terminal of the second light-emitting component is the anode of the light-emitting diode, and the second terminal of the second light-emitting component is the cathode of the light-emitting diode;

[0061] The second photosensitive component is a photosensitive triode, the first terminal of the second photosensitive component is the collector of the photosensitive triode, and the second terminal of the second photosensitive component is the emitter of the photosensitive triode.

[0062] The light-emitting diode converts the feedback signal into an optical signal, and the photosensitive triode converts the optical signal into an electrical signal. This optoelectronic conversion method features fast speed and high efficiency, enabling high-speed and stable transmission of the feedback signal as well as optoelectronic isolation of the circuit.

[0063] In one embodiment, the resistance value of the second resistor R2 is any one of the following: 10 kΩ, 11 kΩ, 12 kΩ, 13 kΩ, and 15 kΩ. The resistance value of the third resistor R3 is any one of the following: 2.7 kΩ, 3.3 kΩ, 3.6 kΩ, 3.9 kΩ, and 4.3 kΩ. The resistance value of the fourth resistor R4 is any one of the following: 10 kΩ, 11 kΩ, 12 kΩ, 13 kΩ, and 15 kΩ.

[0064] Embodiment 2.

[0065] See Figure 1 , the embodiment of the present application provides an energy storage air conditioner, including the isolation fan speed regulation circuit described in any one of Embodiment 1, as well as a control board and an isolation fan. Its specific embodiments are consistent with the embodiments and achieved technical effects described in the above Embodiment 1, and some contents will not be elaborated here.

[0066] As used in the specification, claims, and the above drawings of the present application, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh", "eighth", "ninth", etc. (if any) are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "include" and "correspond to" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily limit to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these process, method, product, or device.

[0067] The above are only the preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application, according to the technical solution and application concept of the present application, makes equivalent substitutions or changes, and should be covered by the protection scope of the present application.

Claims

1. An isolated fan speed control circuit, characterized in that: Used for energy storage air conditioner, the energy storage air conditioner includes an isolation fan and a control board, and the isolation fan speed control circuit includes: A motor speed control module, the motor speed control module is electrically connected to the isolation fan, and is used to drive the isolation fan according to the driving signal of the control board, and is used to generate a feedback signal and send it to the control board; A first protection module, the first protection module comprising a first optical coupling unit, the first optical coupling unit being electrically connected to the motor speed control module and the control board respectively and realizing photoelectric isolation of the drive signal; A second protection module, the second protection module includes a second optical coupling unit, the second optical coupling unit is electrically connected to the motor speed control module and the control board respectively and realizes optical isolation of the feedback signal; The first optical coupling unit includes a first light emitting component and a first photosensitive component; The first end of the first light-emitting component is connected to a first voltage, the second end of the first light-emitting component is electrically connected to the driving control end of the control board, and the first light-emitting component is used to convert the driving signal sent by the driving control end into an optical signal; The first end of the first photosensitive component is electrically connected to the power supply end of the isolation fan, and the second end of the first photosensitive component is electrically connected to the PWM signal output end of the motor speed control module. The first photosensitive component is used to establish a conduction channel between the power supply end of the isolation fan and the PWM signal output end of the motor speed control module when the first light-emitting component converts the drive signal sent by the drive control end into an optical signal; the first protection module also includes a first resistor; the first resistor is arranged between the second end of the first light-emitting component and the drive control end of the control board, and the resistance value of the first resistor is any one of the following: 270Ω, 300Ω, 330Ω, 360Ω, 390Ω, 430Ω and 470Ω.

2. The isolated fan speed regulating circuit according to claim 1, characterized in that: The first light-emitting component is a light-emitting diode, the first end of the first light-emitting component is an anode of the light-emitting diode, and the second end of the first light-emitting component is a cathode of the light-emitting diode; The first photosensitive component is a phototransistor, the first end of the first photosensitive component is the collector of the phototransistor, and the second end of the first photosensitive component is the emitter of the phototransistor.

3. The isolated fan speed regulating circuit according to claim 1, characterized in that: The second optical coupling unit includes a second resistor, a second light-emitting component and a second photosensitive component; A first end of the second light-emitting component is electrically connected to a feedback output end of the motor speed control module, a second end of the second light-emitting component is grounded, and the second light-emitting component is used to convert a feedback signal sent by the feedback output end into an optical signal; The first end of the second photosensitive component is electrically connected to the feedback receiving end of the control board, the second end of the second photosensitive component is grounded, and the second photosensitive component is used to establish a conduction channel between the first end and the second end of the second photosensitive component when the second light-emitting component converts the feedback signal sent by the feedback output end into an optical signal; The first end of the second resistor is electrically connected to the first end of the second photosensitive component, and the second end of the second resistor is connected to the first voltage.

4. The isolated fan speed regulating circuit according to claim 3, characterized in that: The second protection module further includes a third resistor and a fourth resistor; the first end of the second light-emitting component is also grounded through the fourth resistor, and the second end of the second light-emitting component is grounded through the third resistor.

5. The isolated fan speed regulating circuit according to claim 3, characterized in that: The second light-emitting component is a light-emitting diode, the first end of the second light-emitting component is an anode of the light-emitting diode, and the second end of the second light-emitting component is a cathode of the light-emitting diode; The second photosensitive component is a phototransistor, the first end of the second photosensitive component is the collector of the phototransistor, and the second end of the second photosensitive component is the emitter of the phototransistor.

6. The isolated fan speed regulating circuit according to claim 3, characterized in that: The resistance of the second resistor is any one of the following: 10 kΩ, 11 kΩ, 12 kΩ, 13 kΩ and 15 kΩ.

7. The isolated fan speed regulating circuit according to claim 4, characterized in that: The resistance of the third resistor is any one of the following: 2.7 kΩ, 3.3 kΩ, 3.6 kΩ, 3.9 kΩ and 4.3 kΩ; The resistance of the fourth resistor is any one of the following: 10 kΩ, 11 kΩ, 12 kΩ, 13 kΩ and 15 kΩ.

8. An energy storage air conditioner, characterized in that: It comprises the isolation fan speed regulation circuit, control panel and isolation fan as described in any one of claims 1 to 7.

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