Air compressor control assembly and oxygen generator

Abstract

The utility model relates to an air compressor control assembly and an oxygenerator, and the air compressor control assembly comprises a main control circuit which is used for outputting an air compressor control signal; the input end of the air compressor control circuit is connected to a power supply, the output end of the air compressor control circuit is connected with an air compressor, the controlled end of the air compressor control circuit is connected with the main control circuit, and the air compressor control circuit is used for controlling the air compressor to work according to the air compressor control signal; the input end of the anti-shake circuit is connected with the main control circuit, the output end of the anti-shake circuit is connected with the controlled end of the air compressor control circuit, and the anti-shake circuit is used for carrying out anti-shake processing on the air compressor control signal. The control stability of the air compressor is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of oxygen generator control, specifically relates to a kind of air compressor control assembly and oxygen generator. BACKGROUND

[0002] Air compressor, that is, air compressor, is a kind of equipment for compressing gas. It is widely used in various electrical equipment, for example, household oxygen generator.

[0003] In practical application, the air compressor control signal output from the main control circuit to the air compressor control circuit will cause the air compressor control circuit to control the air compressor to work incorrectly due to carrying interference signal. UTILITY MODEL CONTENTS

[0004] The utility model aims at how to improve the stability of air compressor control.

[0005] In the first aspect, the application provides an air compressor control assembly for controlling air compressor, which comprises:

[0006] Main control circuit, for outputting air compressor control signal;

[0007] Air compressor control circuit, input end is connected to power supply, the output end of the air compressor control circuit is connected with air compressor, the controlled end of the air compressor control circuit is connected with the main control circuit, and the air compressor control circuit is used to control the air compressor to work according to the air compressor control signal;

[0008] Anti-shake circuit, input end is connected with the main control circuit, the output end of the anti-shake circuit is connected with the controlled end of the air compressor control circuit, and the anti-shake circuit is used to carry out anti-shake processing to the air compressor control signal.

[0009] In some embodiments, the air compressor control assembly comprises:

[0010] System mainboard, the main control circuit is arranged on the system mainboard.

[0011] In some embodiments, the air compressor control assembly comprises:

[0012] Power board, the system mainboard and the power board are different circuit boards, and the air compressor control circuit is arranged on the power board.

[0013] In some embodiments, the anti-shake circuit is configured to convert input signal in preset voltage range into high level signal or low level signal.

[0014] In some embodiments, the anti-shake circuit comprises hysteresis comparison circuit.

[0015] In some embodiments, the hysteresis comparison circuit comprises: a first resistor, a second resistor, a third resistor, a fourth resistor, and a first comparator;

[0016] One end of the first resistor is connected with the power supply, the other end of the first resistor is connected with one end of the second resistor, the other end of the second resistor is grounded, and the common end of the first resistor and the second resistor is connected with the inverting input end of the first comparator;

[0017] One end of the third resistor is connected with the master control circuit, the other end of the third resistor is connected with the non-inverting input end of the first comparator, and the output end of the first comparator is connected with the controlled end of the air compressor control circuit;

[0018] One end of the fourth resistor is connected with the output end of the first comparator, and the other end of the fourth resistor is connected with the non-inverting input end of the first comparator.

[0019] In some embodiments, the hysteresis comparison circuit comprises: a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, and a second comparator;

[0020] One end of the fifth resistor is connected with the power supply, the other end of the fifth resistor is connected with one end of the sixth resistor, the other end of the sixth resistor is grounded, and the common end of the fifth resistor and the sixth resistor is connected with the non-inverting input end of the second comparator;

[0021] One end of the seventh resistor is connected with the master control circuit, the other end of the seventh resistor is connected with the inverting input end of the second comparator, and the output end of the second comparator is connected with the controlled end of the air compressor control circuit;

[0022] One end of the eighth resistor is connected with the output end of the second comparator, and the other end of the eighth resistor is connected with the non-inverting input end of the second comparator.

[0023] In some embodiments, the air compressor control assembly comprises:

[0024] An isolation circuit, a primary side of which is connected with the power supply, and a secondary side of which is connected with the system mainboard to provide low-voltage direct-current power to the system mainboard.

[0025] In some embodiments, the air compressor control circuit comprises:

[0026] A relay, an input end of which is connected with the power supply, and an output end of which is connected with the air compressor;

[0027] A relay driving circuit is connected between the controlled end of the relay and the output end of the master control circuit, and is used to control the relay to be turned on according to the air compressor control signal.

[0028] In a second aspect, the application provides an oxygen generator, comprising: an air compressor and the air compressor control assembly, wherein the air compressor control assembly is connected with the air compressor and controls the air compressor to work.

[0029] The application adds an anti-shake circuit between the MCU and the air compressor control circuit. When the MCU sends an error driving signal to the air compressor control circuit, the error driving signal is filtered out by the anti-shake circuit, so that the misoperation of the air compressor can be effectively avoided. The application avoids the situation that the MCU outputs an error driving signal due to external interference (for example, the grounding terminal is detached, and an external interference signal affects the air compressor control signal output by the MCU), so that the air compressor misoperates, the air compressor continuously opens and closes, noise is generated, and even serious heating occurs, which has application risks. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a circuit schematic diagram of the air compressor control assembly of an embodiment of the application;

[0031] Figure 2 It is a circuit schematic diagram of the air compressor control assembly of another embodiment of the application;

[0032] Figure 3 It is a circuit schematic diagram of an embodiment of the hysteresis comparison circuit of the application;

[0033] Figure 4 It is a waveform diagram of the hysteresis comparison circuit shown in Figure 3

[0034] Figure 5 It is a circuit schematic diagram of another embodiment of the hysteresis comparison circuit of the application;

[0035] Figure 6 It is a waveform diagram of the hysteresis comparison circuit shown in Figure 5

[0036] In the drawings, the components represented by the respective reference numerals are as follows:

[0037] Master control circuit 10;

[0038] Anti-shake circuit 20;

[0039] Air compressor control circuit 30;

[0040] Air compressor 40;

[0041] First to eighth resistors R1 to R8;​​

[0042] System mainboard working power supply VCC;

[0043] Un-damped driving signal VIN;

[0044] Damped driving signal VOUT;

[0045] First comparator U1;

[0046] Second comparator U2; DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0048] In the description of the present application, the terms "first", "second" are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0049] In the description of the present application, the term "for example" is used to indicate "as an example, illustration or explanation". Any embodiment described as "for example" in the present application is not necessarily interpreted as more preferred or more advantageous than other embodiments. The following description is given in order to enable any person skilled in the art to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that those skilled in the art can realize the present application without using these specific details. In other examples, well-known structures and processes will not be described in detail to avoid unnecessary details making the description of the present application obscure. Therefore, the present application is not intended to be limited to the shown embodiments, but is consistent with the broadest scope of principles and features disclosed.

[0050] Example 1

[0051] In a first aspect, the present application provides an air compressor control assembly for controlling an air compressor.

[0052] In an embodiment, the air compressor control assembly can include at least two circuit boards, respectively referred to as a power supply board and a system mainboard.

[0053] In some embodiments, the power board accesses an alternating current power source (for example, mains electricity), one or more of an AC-AC circuit, an AC-DC circuit, a DC-DC circuit, and the like, in combination, to convert into a working power supply (power supply) of the air compressor 40, a working power supply VCC of the system mainboard. Further, a DC-DC power supply circuit can also be provided on the system mainboard to further convert the working power supply into the power required by each module. The specific implementation is not limited here. Exemplarily, an isolation circuit such as a transformer is provided on the power board, a primary side of the transformer is connected with the power supply, and a secondary side of the transformer is connected with the system mainboard to provide a low-voltage direct-current power supply to the system mainboard.

[0054] Referring to Figure 1 In some embodiments, the air compressor control assembly of the present application includes:

[0055] The main control circuit 10 is used to output an air compressor control signal.

[0056] The air compressor control circuit 30 has an input end connected with the power supply, an output end connected with the air compressor 40, and a controlled end connected with the main control circuit 10. The air compressor control circuit 30 is used to control the working of the air compressor 40 according to the air compressor control signal.

[0057] The anti-shake circuit 20 has an input end connected with the main control circuit 10 and an output end connected with the controlled end of the air compressor control circuit 30. The anti-shake circuit 20 is used to perform anti-shake processing on the air compressor control signal.

[0058] In the present embodiment, the main control circuit 10 can be implemented as a microcontroller unit (MCU) and a peripheral circuit working in cooperation with the MCU. Exemplarily, the main control circuit 10 is provided on the system mainboard.

[0059] The air compressor control circuit 30 can be implemented as a switching circuit and a driving circuit. The input end of the switching circuit is connected with the power supply, the output end is connected with the air compressor 40, and the controlled end is connected with the driving circuit. The MCU controls the conduction of the switching circuit to control the working of the air compressor 40 by outputting the air compressor control signal to the driving circuit, and also can control the stop working of the air compressor 40 by controlling the cut-off of the switching circuit.

[0060] The anti-shake circuit 20 can be implemented as a circuit for avoiding misoperation. For example, a hysteresis comparison circuit.

[0061] The application adds the anti-jitter circuit 20 between the MCU and the air compressor control circuit 30. When the MCU sends an error driving signal to the air compressor control circuit 30, the error driving signal is filtered out by the anti-jitter circuit 20, which can effectively avoid the misoperation of the air compressor 40. Avoid the situation that the MCU will misoperate due to external interference (such as the grounding terminal falling off, the external interference signal affecting the air compressor control signal output by the MCU), which causes the MCU to output an error driving signal and causes the air compressor 40 to misoperate. The air compressor 40 will continue to switch and vibrate, produce noise, and even cause serious heating, which has application risks.

[0062] In some embodiments, the main control circuit 10 is arranged on the system mainboard.

[0063] In some embodiments, the working power supply of the air compressor 40 is a strong power supply circuit, and the system mainboard is a weak control circuit, which needs to be isolated.

[0064] As shown in Figure 2 In the embodiment, the air compressor control circuit 30 is arranged on the power board. In this way, the air compressor 40 control line on the system mainboard can be avoided, which brings the safety problem and the increased insulation and electromagnetic interference (EMI) cost for the safety problem. In the embodiment, the air compressor control circuit 30 is arranged on the power board. The grounding terminal may fall off, the transmission connection line may be grounded, the low-level signal may not be completely grounded, the driving signal may be jittered, and the air compressor 40 may be misoperated. The application can prevent jitter through the anti-jitter circuit 20 to avoid the misoperation of the air compressor 40. Exemplarily, in some embodiments, the anti-jitter circuit 20 is arranged on the power board. In some other embodiments, the anti-jitter circuit 20 is arranged on the system mainboard.

[0065] In some embodiments, the anti-jitter circuit 20 is arranged to convert an input signal in a preset voltage range into a high-level signal or a low-level signal.

[0066] In this way, when an error driving signal is generated, it will be converted into a continuous high-level signal or a low-level signal by the anti-jitter circuit 20, which can avoid the continuous switch jitter of the air compressor 40, the generation of noise, and even the serious heating, which has application risks. For example, the anti-jitter circuit 20 includes a hysteresis comparison circuit.

[0067] Referring to Figure 3In some embodiments, the hysteresis comparison circuit comprises: a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, and a first comparator U1; wherein one end of the first resistor R1 is connected to the power supply, the other end of the first resistor R1 is connected to one end of the second resistor R2, the other end of the second resistor R2 is grounded, and the common end of the first resistor R1 and the second resistor R2 is connected to the inverting input terminal of the first comparator U1; one end of the third resistor R3 is connected to the main control circuit 10, the other end of the third resistor R3 is connected to the non-inverting input terminal of the first comparator U1, and the output terminal of the first comparator U1 is connected to the controlled end of the air compressor control circuit 30; one end of the fourth resistor R4 is connected to the output terminal of the first comparator U1, and the other end of the fourth resistor R4 is connected to the non-inverting input terminal of the first comparator U1.

[0068] In this embodiment, the hysteresis comparison circuit is implemented as a high-level hysteresis anti-jitter. The air compressor control signal is implemented as a high-level driving signal, and a low-level driving signal is implemented as a signal for controlling the air compressor 40 to stop working. As shown in the hysteresis comparison circuit. Figure 3

[0069] Referring to Figure 4 , VIN is an undamped driving signal, and VOUT is a driving signal after damping. The MCU outputs a driving signal. If the voltage value of the driving signal is greater than the output high-level entry threshold value VH_Entry set by the hysteresis comparison circuit, the first comparator U1 outputs a high-level driving signal to the air compressor control circuit 30, and the air compressor control circuit 30 controls the air compressor 40 to work. If the air compressor 40 is started and the voltage value of the driving signal is less than the high-level exit threshold value VH_Exit, the first comparator U1 outputs a low-level driving signal to the air compressor control circuit 30 to control the air compressor 40 to stop working.

[0070] In this embodiment, the voltage dividing circuit composed of the first resistor R1 and the second resistor R2 converts the working power VCC into the comparison voltage of the hysteresis comparison circuit, and the third resistor R3 is used to access the driving signal (to-be-compared voltage) output by the MCU. In addition, the difference range of the high-level entry threshold value VH_Entry and the high-level exit threshold value VH_Exit can be adjusted by the size of the fourth resistor R4.

[0071] In this embodiment, the driving signal output by the MCU is subject to interference signals and jitter during transmission, but as long as the jitter range does not exceed the hysteresis range of the hysteresis comparison circuit (the difference between the high-level entry threshold value VH_Entry and the high-level exit threshold value VH_Exit), the anti-jitter circuit 20 outputs a fixed high level to the air compressor control circuit 30, and the air compressor 40 will not malfunction due to jitter. ​

[0072] Referring to Figure 5 In some embodiments, the hysteresis comparison circuit comprises a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8 and a second comparator U2; one end of the fifth resistor R5 is connected with the power supply, the other end of the fifth resistor R5 is connected with one end of the sixth resistor R6, the other end of the sixth resistor R6 is grounded, and the common end of the fifth resistor R5 and the sixth resistor R6 is connected with the non-inverting input terminal of the second comparator U2; one end of the seventh resistor R7 is connected with the main control circuit 10, the other end of the seventh resistor R7 is connected with the inverting input terminal of the second comparator U2, and the output terminal of the second comparator U2 is connected with the controlled terminal of the air compressor control circuit 30; one end of the eighth resistor R8 is connected with the output terminal of the second comparator U2, and the other end of the eighth resistor R8 is connected with the non-inverting input terminal of the second comparator U2.

[0073] Referring to Figure 6 VIN is the non-debounced driving signal, and VOUT is the debounced driving signal. In the embodiment, the hysteresis comparison circuit is implemented as a low-level hysteresis debouncing circuit 20. The specific working principle is similar to that of the high-level hysteresis debouncing circuit 20. The difference range of the low-level entry threshold VL_Entry and the low-level exit threshold VL_Exit can be adjusted by the size of the eighth resistor R8.

[0074] In some embodiments, the air compressor control circuit 30 comprises a relay, the input terminal of which is connected with the power supply, and the output terminal of which is connected with the air compressor 40; a relay drive circuit connected between the controlled terminal of the relay and the output terminal of the main control circuit 10, the relay drive circuit being used for controlling the relay to be turned on according to the air compressor control signal.

[0075] Example 2

[0076] In a second aspect, the application provides an oxygen generator, which comprises an air compressor 40 and the air compressor control assembly described above, wherein the air compressor control assembly is connected with the air compressor 40 and controls the air compressor 40 to work.

[0077] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0078] While the preferred embodiments of the application have been described, those skilled in the art will recognize that the application can be practiced with modification and alteration within the spirit and scope of the application. Accordingly, the description is to be regarded as illustrative in nature and not as restrictive. The scope of the application is indicated by the appended claims, rather than by the foregoing description.

[0079] Obviously, many modifications and variations of the present application are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims, the application can be practiced otherwise than as specifically described.

Claims

1. An air compressor control component for controlling an air compressor, characterized in that, The application relates to an air compressor control system. The application relates to an air compressor control system. The application relates to an air compressor control system. The application relates to an air compressor control system.

2. The air compressor control assembly of claim 1, wherein, The application relates to an air compressor control system. The application relates to an air compressor control system.

3. The air compressor control assembly of claim 2, wherein, The application relates to an air compressor control system. The application relates to an air compressor control system.

4. The air compressor control assembly of any one of claims 1-3, wherein, The application relates to an air compressor control system.

5. The air compressor control assembly of any one of claims 1-3, wherein, The application relates to an air compressor control system.

6. The air compressor control assembly of claim 5, wherein, The application relates to an air compressor control system. The application relates to an air compressor control system. The application relates to an air compressor control system. The application relates to an air compressor control system.

7. The air compressor control assembly of claim 5, wherein, The application relates to an air compressor control system. The application relates to an air compressor control system. The application relates to an air compressor control system. The application relates to an air compressor control system.

8. The air compressor control assembly of claim 3, wherein, The application relates to an air compressor control system. The application relates to an air compressor control system.

9. The air compressor control assembly of claim 8, wherein, The application relates to an air compressor control system. The application relates to an air compressor control system. The application relates to an air compressor control system.

10. An oxygen generator, characterized by comprising: The application relates to an air compressor control system. The application relates to an air compressor control system. The application relates to an air compressor control system. The application relates to an air compressor control system. The application relates to an air compressor control system. The application relates to an air compressor control system. The application relates to an air compressor control system. The application relates to an air compressor control system. The application relates to an air compressor control system. The application relates to an air compressor control system. The application relates to an air compressor control system. The application relates to an air compressor control system. The application relates to an air compressor control system. The application relates to an air compressor control system. The application relates to an air compressor control system. 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