Self-adaptive vacuum generator control circuit

Abstract

The utility model discloses a self-adaptive vacuum generator control circuit, which comprises a power supply module, and a main control module, a pressure sensor, a vacuum generator three-way valve, a four-way valve, a first electric control valve, a second electric control valve and a third electric control valve which are connected with the power supply module, the pressure sensor is connected to the first end of the four-way valve in series. The first electric control valve is connected between the first end of the vacuum generator three-way valve and an air inlet of the air compressor in series. The second electric control valve is connected in series between the second end of the four-way valve and the liquid injection port; the third electric control valve is connected in series between the second end of the vacuum generator three-way valve and the third end of the four-way valve; the main control module can adjust the working time of the air compressor according to a difference value between a pressure value fed back by the pressure sensor and a preset value, so that the vacuum pressure in the container system is within a preset range; through the structure, the air pressure can be accurately controlled in real time, and the vacuum degree in the container system is maintained to deal with instability of input air pressure.

Description

Technical Field

[0001] The utility model relates to a field, in particular to an adaptive vacuum generator control circuit. Background Art

[0002] With the development of automobile maintenance, different containers have the requirements of airtightness testing, and even use the vacuum pressure difference principle of the container system to make liquid filling equipment, such as vacuum filling machine (adding water, adding coolant, etc.), using the air compressor of the repair shop, the container is evacuated to a certain vacuum degree through the vacuum generator, and the liquid is added by using the pressure difference of the container vacuum degree; or vacuum pressure test is performed to check whether the container is leaking.

[0003] However, due to the uneven pressure and efficiency of air compressors on the market, or the air guns on the production line are used by multiple people, the pressure output by the air compressor is extremely unstable. When the vacuum generator is evacuated to the user's set value, it is found that the vacuum value stabilization time of the container varies from 0 to 30 seconds during pressure maintenance, and the tolerance value of the vacuum pressure value also varies greatly; therefore, an adaptive vacuum generator control circuit is urgently needed to solve the above problems. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes an adaptive vacuum generator control circuit.

[0005] The technical solution adopted by an embodiment of the utility model to solve its technical problem is: an adaptive vacuum generator control circuit, including a power module and a main control module connected to the power module, a pressure sensor, a vacuum generator three-way valve, a four-way valve, a first electric control valve, a second electric control valve and a third electric control valve;

[0006] The pressure sensor is serially connected to the first end of the four-way valve and is connected to the main control module;

[0007] The first electric control valve is connected in series between the first end of the three-way valve of the vacuum generator and the air inlet of the air compressor and is connected to the main control module;

[0008] The second electric control valve is connected in series between the second end of the four-way valve and the liquid injection port and is connected to the main control module;

[0009] The third electric control valve is connected in series between the second end of the three-way valve of the vacuum generator and the third end of the four-way valve and is connected to the main control module;

[0010] The third end of the three-way valve of the vacuum generator is used as an exhaust port, and the fourth end of the four-way valve is connected to the container system;

[0011] The main control module can adjust the working time of the air compressor according to the difference between the pressure value fed back by the pressure sensor and the preset value, so that the vacuum pressure in the container system is within the preset range.

[0012] As one of the preferred embodiments of the present utility model, an adaptive vacuum generator control circuit further includes a display module connected to the power module and the main control module.

[0013] As one of the preferred embodiments of the present utility model, an adaptive vacuum generator control circuit further includes a key module connected to the main control module.

[0014] As one of the preferred embodiments of the present utility model, an adaptive vacuum generator control circuit further includes a buzzer module connected to the power module and the main control module.

[0015] As one of the preferred embodiments of the present utility model, the first electrically controlled valve, the second electrically controlled valve and / or the third electrically controlled valve are configured as solenoid valves.

[0016] The beneficial effects of the utility model include: an adaptive vacuum generator control circuit, comprising a power module and a main control module connected to the power module, a pressure sensor, a vacuum generator three-way valve, a four-way valve, a first electric control valve, a second electric control valve and a third electric control valve; the pressure sensor is connected in series to the first end of the four-way valve and is connected to the main control module; the first electric control valve is connected in series between the first end of the vacuum generator three-way valve and the air inlet of the air compressor and is connected to the main control module; the second electric control valve is connected in series between the second end of the four-way valve and the liquid injection port and is connected to the main control module; the third electric control valve is connected in series between the second end of the vacuum generator three-way valve and the third end of the four-way valve and is connected to the main control module; the third end of the vacuum generator three-way valve serves as an exhaust port, and the fourth end of the four-way valve is connected to the container system; the main control module can adjust the working time of the air compressor according to the difference between the pressure value fed back by the pressure sensor and the preset value, so that the vacuum pressure in the container system is within the preset range; the above structure can realize real-time and accurate control of air pressure, maintain the vacuum degree in the container system, and cope with the instability of input air pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 It is a principle block diagram of an adaptive vacuum generator control circuit;

[0019] Figure 2 This is the circuit schematic diagram of the main control module;

[0020] Figure 3 This is the schematic diagram of the first part of the power module;

[0021] Figure 4 This is the schematic diagram of the second part of the power module;

[0022] Figure 5 It is the schematic diagram of the first part of the circuit of the display module;

[0023] Figure 6 It is the schematic diagram of the second part of the circuit of the display module;

[0024] Figure 7 is a circuit schematic diagram of the first electric control valve;

[0025] Figure 8 is a circuit schematic diagram of the second electric control valve;

[0026] Fig. 9 is a circuit schematic diagram of the third electric control valve;

[0027] Fig.10 This is the circuit schematic diagram of the pressure sensor;

[0028] Fig.11 This is the circuit schematic diagram of the key module;

[0029] Fig.12 This is the circuit schematic diagram of the buzzer module. DETAILED DESCRIPTION

[0030] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0031] In the description of the present utility model, the meaning of "more than" is more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0034] Reference Figures 1 to 12 , an adaptive vacuum generator control circuit, comprising a power module 10 and a main control module 20 connected to the power module 10, a pressure sensor 30, a vacuum generator three-way valve 40, a four-way valve 50, a first electric control valve 61, a second electric control valve 62 and a third electric control valve 63;

[0035] The pressure sensor 30 is connected in series to the first end of the four-way valve 50 and is connected to the main control module 20;

[0036] The first electric control valve 61 is connected in series between the first end of the vacuum generator three-way valve 40 and the air inlet of the air compressor and is connected to the main control module 20;

[0037] The second electric control valve 62 is connected in series between the second end of the four-way valve 50 and the liquid injection port and is connected to the main control module 20;

[0038] The third electric control valve 63 is connected in series between the second end of the vacuum generator three-way valve 40 and the third end of the four-way valve 50 and is connected to the main control module 20;

[0039] The third end of the vacuum generator three-way valve 40 serves as an exhaust port, and the fourth end of the four-way valve 50 is connected to the container system;

[0040] The main control module 20 can adjust the working time of the air compressor according to the difference between the pressure value fed back by the pressure sensor 30 and the preset value, so that the vacuum pressure in the container system is within the preset range.

[0041] In this utility model, the working principle is as follows:

[0042] 1. Initialize the corresponding parameters and set the target vacuum degree of the container system;

[0043] 2. Read the data of the pressure sensor 30: open the first electrically controlled valve 61 and the third electrically controlled valve 63, close the second electrically controlled valve 62, form a container closed loop system, put the vacuum generator into working state, and read the data of the pressure sensor 30 at the same time;

[0044] 3. Adjust the control logic: According to the comparison and calculation between the current value and the set value, give the appropriate time to adjust the output pressure of the air compressor;

[0045] 4. Main control cycle: According to the data sent back in real time by the pressure sensor 30, the control circuit is continuously adjusted to control the working time of the air compressor, so that the air compressor outputs a reasonable pressure and remains within the vacuum pressure range set by the user;

[0046] 5. Pressure holding mode: When the vacuum value of the container system is stable in a vacuum value range for a relatively long time, the pressure holding mode is entered to perform a 60s pressure holding test to test whether the vacuum value of the container system is stable within the vacuum value tolerance range. If the conditions are met, the test is prompted to pass, otherwise it is prompted to fail.

[0047] 6. Additional filling mode function: connect the liquid to be filled to the filling port, i.e., the control port of the second electric control valve 62, and after pressing the filling button, the second electric control valve 62 is opened to fill the liquid;

[0048] 7. By reading the data of the pressure sensor 30 in real time, comparing the difference with the preset value, controlling the output time of the air compressor to deal with the uneven air pressure, and controlling the pressure output according to the actual circuit, continuously adjusting the control action, and dynamically adjusting the output pressure of the air compressor, the vacuum generator can be effectively managed under uneven air pressure conditions, and the stability of the target vacuum degree can be maintained to meet the needs of actual work scenarios. At the same time, it can also improve flexibility, allowing the same device to be equipped with multiple air compressors of different models to adapt to the needs of different work scenarios.

[0049] Reference Figure 5-6 In one embodiment, an adaptive vacuum generator control circuit also includes a display module 70 connected to the power module 10 and the main control module 20; used to display the preset pressure value, the current pressure value, the pressure holding time, the on / off status of each electronically controlled valve, etc.

[0050] Reference Fig.10 In one embodiment, an adaptive vacuum generator control circuit further includes a button module 80 connected to the main control module 20; the button module 80 includes a filling start / pause button, a filling stop button, a leak detection start / button, a power button, etc.

[0051] Reference Fig.12 In one embodiment, an adaptive vacuum generator control circuit further includes a buzzer module 90 connected to the power module 10 and the main control module 20; the buzzer module 90 is used as a sound alarm during leak detection or filling, and can be used in conjunction with an LED indicator light or a light alarm on a display screen to realize an audible and visual alarm.

[0052] Preferably, the first electrically controlled valve 61 , the second electrically controlled valve 62 and / or the third electrically controlled valve 63 are configured as solenoid valves.

[0053] Of course, the present invention is not limited to the above-mentioned embodiments, and technicians familiar with the field may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications and substitutions are all included in the scope defined by the claims of this application.

Claims

1. An adaptive vacuum generator control circuit, characterized in that: It comprises a power module (10), a main control module (20) connected to the power module (10), a pressure sensor (30), a vacuum generator three-way valve (40), a four-way valve (50), a first electrically controlled valve (61), a second electrically controlled valve (62) and a third electrically controlled valve (63); The pressure sensor (30) is serially connected to the first end of the four-way valve (50) and is connected to the main control module (20); The first electrically controlled valve (61) is connected in series between the first end of the vacuum generator three-way valve (40) and the air inlet of the air compressor and is connected to the main control module (20); The second electrically controlled valve (62) is connected in series between the second end of the four-way valve (50) and the liquid injection port and is connected to the main control module (20); The third electrically controlled valve (63) is connected in series between the second end of the vacuum generator three-way valve (40) and the third end of the four-way valve (50), and is connected to the main control module (20); The third end of the vacuum generator three-way valve (40) serves as an exhaust port, and the fourth end of the four-way valve (50) is connected to the container system; The main control module (20) can adjust the working time of the air compressor according to the difference between the pressure value fed back by the pressure sensor (30) and a preset value, so that the vacuum pressure in the container system is within a preset range.

2. An adaptive vacuum generator control circuit according to claim 1, characterized in that: It also includes a display module (70) connected to the power module (10) and the main control module (20).

3. The adaptive vacuum generator control circuit according to claim 1, characterized in that: It also includes a key module (80) connected to the main control module (20).

4. The adaptive vacuum generator control circuit according to claim 1, characterized in that: It also includes a buzzer module (90) connected to the power module (10) and the main control module (20).

5. The adaptive vacuum generator control circuit according to claim 1, characterized in that: The first electrically controlled valve (61), the second electrically controlled valve (62) and / or the third electrically controlled valve (63) are configured as solenoid valves.

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