Vacuum device of PCB detection equipment and PCB detection system

Abstract

The invention provides a vacuum device of PCB detection equipment and a PCB detection system, and relates to the technical field of PCB detection. The vacuum device of the PCB detection equipment comprises a fan which is used for vacuumizing; a main pipeline; each branch pipeline is used for being connected with a negative pressure interface of one PCB detection device, each branch pipeline is connected with the fan through the main pipeline, and each branch pipeline is provided with a first electric control valve; and the control assembly is used for being electrically connected with each piece of PCB detection equipment, and the fan and each first electric control valve are electrically connected with the control assembly. The control assembly is configured to control the power of the draught fan and the opening and closing of the first electric control valves on the branch pipelines corresponding to the PCB detection devices according to the opening state of each PCB detection device. The PCB detection system comprises the vacuum device of the PCB detection equipment and a plurality of pieces of PCB detection equipment. The application is beneficial for reducing workshop noise.

Description

Technical Field

[0001] The present application relates to the technical field of printed circuit board testing, and in particular to a vacuum device for PCB board testing equipment and a PCB board testing system. Background Art

[0002] During the production of printed circuit boards (PCBs), the quality of the PCBs is tested using PCB testing equipment. The PCB testing equipment has a suction port. When the PCB testing equipment is testing the PCBs, the suction port uses negative pressure to absorb and secure the PCBs.

[0003] In a workshop with multiple PCB board testing equipment, each PCB board testing equipment is equipped with a fan and a negative pressure interface for connecting to the corresponding fan. Each PCB board testing equipment generates negative pressure at the corresponding suction port through the corresponding fan.

[0004] However, it is noisy and takes up a lot of space. Summary of the Invention

[0005] The embodiments of the present application provide a vacuum device for PCB board inspection equipment and a PCB board inspection system to solve the problem of high noise in a workshop with multiple PCB board inspection equipment.

[0006] In one aspect, the present application provides a vacuum device for a PCB board inspection device, comprising:

[0007] A fan, the fan being used for vacuuming;

[0008] a main pipe connected to the fan;

[0009] Multiple branch pipes, each of which is used to connect to the negative pressure interface of a PCB board testing device, each of which is connected to the fan through the main pipe, and each of which has a first electrically controlled valve, which is used to control the connection between the corresponding negative pressure interface and the main pipe;

[0010] A control component, the control component being electrically connected to each of the PCB board detection devices, the blower and each of the first electrically controlled valves being electrically connected to the control component;

[0011] The control component is configured to control the power of the fan and the opening and closing of the first electrically controlled valve on the branch pipe corresponding to the PCB board detection device according to the opening state of each PCB board detection device.

[0012] In some embodiments, the vacuum device of the PCB board inspection equipment described in the present application further includes a plurality of negative pressure sensors, each of which is correspondingly arranged on the branch pipe, and is located between the first electrically controlled valve and the corresponding negative pressure interface. Each of the negative pressure sensors is electrically connected to the control component; the negative pressure sensor is configured to detect a negative pressure value of the corresponding negative pressure interface;

[0013] The control component is configured to, after the first electrically controlled valve is opened, adjust the negative pressure value corresponding to the opened first electrically controlled valve to a set value by controlling the power of the fan.

[0014] In some embodiments, the vacuum device of the PCB board detection equipment described in the present application further includes a plurality of alarm components, each of the alarm components being configured to correspond one-to-one with each of the PCB board detection devices, and the control component being configured to, after the first electrically controlled valve is opened, control the first electrically controlled valve to be closed and the alarm component corresponding to the first electrically controlled valve to alarm if the negative pressure value corresponding to the opened first electrically controlled valve is zero.

[0015] In some embodiments, the control component includes a host, a multi-channel analog module and a frequency converter, the multi-channel analog module is electrically connected to each of the negative pressure sensors, the multi-channel analog module is communicatively connected to the host, and the host is electrically connected to each of the PCB board detection devices;

[0016] The host is configured to generate an analog signal according to the power-on state of the PCB board detection device, the negative pressure value, and the set value corresponding to the negative pressure value;

[0017] The frequency converter is electrically connected to the host, and the frequency converter is electrically connected to the fan. The frequency converter is configured to control the power supply frequency of the fan according to the analog signal to control the power of the fan.

[0018] In some embodiments, the vacuum device of the PCB board inspection equipment described in the present application further includes a plurality of pressure relief assemblies, each of the pressure relief assemblies including a second electrically controlled valve, each of the second electrically controlled valves being disposed in a one-to-one correspondence on the branch pipe, a first end of the second electrically controlled valve being in communication with the branch pipe, a connection point between the first end of the second electrically controlled valve and the branch pipe being located between the negative pressure interface and the first electrically controlled valve, a second end of the second electrically controlled valve being configured to communicate with the outside atmosphere, and each of the second electrically controlled valves being electrically connected to the control assembly;

[0019] The control component is configured to, when the PCB board detection device is turned on, first control the corresponding second electrically controlled valve to close, and then control the corresponding first electrically controlled valve to open, so that the corresponding negative pressure interface and the main line are connected; when the PCB board detection device is turned off, first control the corresponding first electrically controlled valve to close, and then control the corresponding second electrically controlled valve to open, so that the corresponding negative pressure interface and the external atmosphere are connected through the second electrically controlled valve.

[0020] In some embodiments, the vacuum device of the PCB board detection equipment described in the present application further includes a duct muffler and a second duct filter, wherein the duct muffler is arranged on the air outlet of the fan; the second duct filter is arranged between the air suction port of the fan and the main line, and the second duct filter is used to filter the airflow entering the fan from the main line.

[0021] In some embodiments, the fan is a vortex fan.

[0022] In some embodiments, the vacuum device of the PCB board inspection equipment described in the present application further includes a third electrically controlled valve; the third electrically controlled valve is disposed between the blower and the main line, the third electrically controlled valve is used to control the connection between the blower and the main line, and the third electrically controlled valve is electrically connected to the control component;

[0023] The control component is configured to control the third electrically controlled valve to close and the fan to stop when all the first electrically controlled valves are closed, and the fan stop time is no earlier than the closing time of the third electrically controlled valve.

[0024] On the other hand, the present application also provides a PCB board detection system, including multiple PCB board detection devices and the vacuum device of the PCB board detection device described above.

[0025] In some embodiments, the PCB board detection system described in the present application further includes a soundproof chamber, and the fan is arranged in the soundproof chamber.

[0026] The present application provides a vacuum device and PCB board detection system for PCB board detection equipment. A single blower, via a main pipe and multiple branch pipes, provides negative pressure for each PCB board detection device in a workshop with multiple PCB board detection devices. This facilitates centralized fan installation, facilitates noise control in the workshop, and solves the problem of high workshop noise. Furthermore, each PCB board detection device no longer needs a separate blower, which helps reduce the volume of each PCB board detection device and the total space occupied by the PCB board detection devices. Furthermore, the system facilitates centralized processing of hot air generated by the blower operation, reduces the heat generated by each PCB board detection device itself, and reduces the impact on the workshop temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0028] Figure 1 A schematic diagram of the pipe connections of a vacuum device for a PCB board inspection device provided in an embodiment of the present application;

[0029] Figure 2 Schematic diagram of the control components of the vacuum device of the PCB board detection equipment provided in an embodiment of the present application.

[0030] Description of reference numerals:

[0031] 10-PCB board testing equipment;

[0032] 100-fan;

[0033] 200-Main Road;

[0034] 300-branch pipeline; 310-first electric control valve;

[0035] 400-control component; 410-host; 420-multi-channel analog module; 430-inverter;

[0036] 500-negative pressure sensor; 510-digital pressure gauge;

[0037] 600-pressure relief assembly; 610-second electric control valve; 620-first pipeline filter;

[0038] 700-Pipeline silencer;

[0039] 800-second pipeline filter;

[0040] 900-Third electronically controlled valve.

[0041] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The embodiments of the present application are described in detail below in conjunction with the drawings.

[0043] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to a fixed connection, an indirect connection via an intermediate medium, internal communication between two components, or an interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0044] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0045] In addition, the terms "comprises" and "having" and any variations thereof are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or display that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, product or display.

[0046] During the production of printed circuit boards (PCBs), the quality of the PCBs is tested using PCB testing equipment. The PCB testing equipment has a suction port. When the PCB testing equipment is testing the PCBs, the suction port uses negative pressure to absorb and secure the PCBs.

[0047] In a workshop with multiple PCB board testing equipment, each PCB board testing equipment is equipped with a fan and a negative pressure interface for connecting to the corresponding fan. Each PCB board testing equipment generates negative pressure at the corresponding suction port through the corresponding fan.

[0048] However, it is noisy and takes up a lot of space.

[0049] Exemplarily, the PCB board inspection equipment includes an automatic optical inspection equipment (Automated Optical Inspection, AOI).

[0050] In order to solve the problem of high noise in a workshop with multiple PCB board testing equipment, the present application provides a vacuum device for PCB board testing equipment.

[0051] Reference Figure 1 and Figure 2 A vacuum device for PCB board testing equipment includes: a fan 100, which is used for vacuuming; a main line 200, which is connected to the fan 100; a plurality of branch lines 300, each of which is used to connect to the negative pressure interface of a PCB board testing equipment 10, each branch line 300 is connected to the fan 100 through the main line 200, and each branch line 300 has a first electrically controlled valve 310, which is used to control the connection between the corresponding negative pressure interface and the main line 200; a control component 400, which is used to be electrically connected to each PCB board testing equipment 10, and the fan 100 and each first electrically controlled valve 310 are electrically connected to the control component 400;

[0052] The control component 400 is configured to control the power of the fan 100 and the opening and closing of the first electrically controlled valve 310 on the branch pipe 300 corresponding to the PCB board testing device 10 according to the opening state of each PCB board testing device 10 .

[0053] An exemplary explanation of "the control component 400 controls the opening and closing of the first electrically controlled valve 310 on the branch pipe 300 corresponding to each PCB board detection device 10 according to the opening state of each PCB board detection device 10": Assume that there are four PCB board detection devices A, B, C and D in a workshop; the opening states of these four PCB board detection devices are A and B open, and C and D closed; then the control component 400 controls the first electrically controlled valve 310 corresponding to A and the first electrically controlled valve 310 corresponding to B to be both opened; and the control component 400 controls the first electrically controlled valve 310 corresponding to C and the first electrically controlled valve 310 corresponding to D to be both closed.

[0054] Exemplarily, the PCB board detection device 10 has a physical button or a virtual button (for example, the carrier is a touch screen) for controlling its power-on state, and the control component 400 can be electrically connected to the carrier of the physical button or the virtual button.

[0055] Exemplarily, the PCB board detection device has a controller that can feedback its startup status, and the control component 400 can be electrically connected to the controller.

[0056] Exemplarily, the PCB board detection device has a relay that can feedback its open state, and the control component 400 can be electrically connected to the relay.

[0057] An exemplary explanation of “the control component 400 controls the power of the fan 100 according to the start-up state of each PCB board detection device 10 ”: Assume that there are four PCB board detection devices 10 , namely A, B, C and D, in a workshop.

[0058] For example, the control component 400 can control the power of the fan 100 based on the number of PCB board inspection devices 10 that are turned on. Specifically, when one of the four PCB board inspection devices 10 is turned on and the other three are turned off, the control component 400 controls the power of the fan 100 to W1; when two of the four PCB board inspection devices 10 are turned on and the other two are turned off, the control component 400 controls the power of the fan 100 to W2; when three of the four PCB board inspection devices 10 are turned on and the other one is turned off, the control component 400 controls the power of the fan 100 to W3; when all four PCB board inspection devices 10 are turned on, the control component 400 controls the power of the fan 100 to W4, where W4>W3>W2>W1. It is understood that when all four PCB board inspection devices are turned off, the control component 400 controls the fan 100 to stop.

[0059] For example, the control component 400 can also control the power of the fan 100 based on the combination of the power-on states of each PCB board inspection device 10. Specifically, if one combination of the power-on states of the four PCB board inspection devices 10 (A, B, C, and D) is that A and B are on and C and D are off, the power of the fan 100 is controlled to be W5. If another combination of the power-on states of the four PCB board inspection devices 10 is that A and C are on and B and D are off, the power of the fan 100 is controlled to be W6.

[0060] Reference Figure 1 and Figure 2 The vacuum device for PCB testing equipment uses a single blower 100, via a main line 200 and multiple branch lines 300, to provide negative pressure to each PCB testing device 10 in a workshop with multiple PCB testing devices 10. This facilitates centralized blower installation, facilitating noise control in the workshop and resolving the issue of excessive noise. Furthermore, each PCB testing device 10 no longer needs a separate blower, reducing the size of each device 10 and the total space occupied by the PCB testing equipment.

[0061] It should be noted that the fan generates hot air during operation. If each PCB board testing device 10 is equipped with a fan, this hot air will inevitably be discharged into the workshop. The vacuum device in the PCB board testing device facilitates centralized processing of the hot air generated by the fan operation, reducing the heat generated by each PCB board testing device 10 itself and thus minimizing the impact on the workshop temperature.

[0062] In addition, the vacuum device of the PCB board testing equipment is also helpful in reducing energy consumption in the production workshop.

[0063] Table 1 Comparative data on energy saving of vacuum devices for PCB board testing equipment

[0064]

[0065] Exemplary, with reference to Table 1, wherein, PCB board detection equipment one, PCB board detection equipment two and PCB board detection equipment three are three different types of PCB board detection equipment in the workshop.Wherein, the quantity of PCB board detection equipment one is 7, the quantity of PCB board detection equipment two is 6, and the quantity of PCB board detection equipment three is 4, which adds up to 17 PCB board detection equipments in the workshop.Before transformation, each PCB board detection equipment one, each PCB board detection equipment two and each PCB board detection equipment three all had corresponding blower fan, and before transformation, the annual power consumption of 17 PCB board detection equipments was 92005.63KWH.After transformation, PCB board detection system (comprising the vacuum device and 17 PCB board detection equipment of the PCB board detection equipment provided by the application), under the premise of maintaining original workload, annual power consumption is 29636.25KWH, and energy consumption is significantly reduced relative to before transformation. The workshop air conditioning unit is used to cool the workshop to maintain the workshop temperature. While maintaining the same temperature requirement, the annual power consumption of the workshop air conditioning unit is reduced from 29,636.25 kilowatt-hours to 15,578.62 kilowatt-hours. For the workshop, by using the vacuum device of the PCB board testing equipment provided in this application, both the PCB testing process and the workshop air conditioning unit achieve the technical effect of reducing energy consumption.

[0066] In some embodiments, reference Figure 1 and Figure 2 The vacuum device of the PCB board testing equipment further includes a plurality of negative pressure sensors 500, each of which is correspondingly arranged on the branch pipe 300. The negative pressure sensor 500 is located between the first electrically controlled valve 310 and the corresponding negative pressure interface. Each negative pressure sensor 500 is electrically connected to the control component 400. The negative pressure sensor 500 is configured to detect the negative pressure value of the corresponding negative pressure interface.

[0067] The control assembly 400 is configured to adjust the negative pressure value corresponding to the opened first electrically controlled valve 310 to a set value by controlling the power of the blower 100 after the first electrically controlled valve 310 is opened.

[0068] It should be noted that the control assembly 400 controls the power of the fan 100 based on the power-on status of each PCB inspection device 10, which can be considered "coarse adjustment." This "coarse adjustment" facilitates rapid response. After the first electrically controlled valve 310 is opened, the negative pressure corresponding to the opened first electrically controlled valve 310 is adjusted to the set value by controlling the power of the fan 100. This constitutes further "fine adjustment" or "correction," facilitating more accurate control of the negative pressure at the negative pressure connection port.

[0069] For example, refer to Figure 1 The vacuum device of the PCB board detection equipment also includes a plurality of digital pressure gauges 510, each digital pressure gauge 510 is arranged on the branch pipe 300 in a one-to-one correspondence, and the digital pressure gauge 510 is used to display the corresponding negative pressure value.

[0070] For example, a valve seat may be provided on the branch line 300 , and the corresponding negative pressure sensor 500 and the corresponding digital pressure gauge 510 may be connected through the valve seat.

[0071] In some embodiments, reference Figure 1 and Figure 2 The vacuum device of the PCB board detection equipment also includes multiple alarm components, each alarm component is used to be set in a one-to-one correspondence with each PCB board detection equipment 10, and the control component 400 is configured to, after the first electric-controlled valve 310 is opened, if the negative pressure value corresponding to the opened first electric-controlled valve 310 is zero, control the first electric-controlled valve 310 to close, and the alarm component corresponding to the first electric-controlled valve 310 to alarm.

[0072] It should be noted that some PCB board detection equipment in the prior art can also be opened when there is no PCB board at the corresponding suction port. After the first electric control valve 310 is opened, if the corresponding suction port is not covered, the vacuum degree in the main line 200 will be destroyed. After the first electric control valve 310 is opened, if the negative pressure value corresponding to the opened first electric control valve 310 is zero, the control component 400 controls the first electric control valve 310 to close to avoid the problem of destroying the vacuum degree of the main line 200 due to the suction port not being covered. The alarm component is used to remind the staff that the suction port is not adsorbed, so that the PCB board to be tested can be placed in time.

[0073] Exemplarily, the alarm component can be an audible alarm, a light alarm, or a combination of audible and light alarm.

[0074] In some embodiments, reference Figure 1 and Figure 2 The control assembly 400 includes a host 410, a multi-channel analog module 420, and a frequency converter 430. The multi-channel analog module 420 is electrically connected to each negative pressure sensor 500, and is in communication with the host 410. The host 410 is electrically connected to each PCB board inspection device 10. The host 410 is configured to generate an analog signal based on the power-on state, negative pressure value, and set value corresponding to the negative pressure value of each PCB board inspection device 10. The frequency converter 430 is electrically connected to the host 410, and is also electrically connected to the fan 100. The frequency converter 430 is configured to control the power supply frequency of the fan 100 based on the analog signal to control the power of the fan 100.

[0075] It can be understood that the host 410, the multi-channel analog module 420 and the frequency converter 430 are the control components 400 based on the frequency conversion control principle, which is conducive to further ensuring energy saving effects.

[0076] Exemplarily, the host is a PLC host. As is understood, as is conventional technology, the PLC host has an analog output interface, and the frequency converter 430 has an analog input interface. Both the first electrically controlled valve 310 and the second electrically controlled valve 610 are connected to an intermediate relay. The opening and closing of the corresponding intermediate relay contacts controls the powering on or off of the corresponding first electrically controlled valve 310 or the corresponding second electrically controlled valve 610, thereby controlling the opening or closing of the corresponding first electrically controlled valve 310 or the corresponding second electrically controlled valve 610. The PLC host controls the powering on and off of the intermediate relay coil to control the opening and closing of the intermediate relay contacts.

[0077] In some embodiments, the vacuum device of the PCB board detection equipment also includes multiple pressure relief components 600, the pressure relief components 600 include second electrically controlled valves 610, each second electrically controlled valve 610 is arranged one-to-one on the branch line 300, the first end of the second electrically controlled valve 610 is connected to the branch line 300, the connection position between the first end of the second electrically controlled valve 610 and the branch line 300 is located between the negative pressure interface and the first electrically controlled valve 310, the second end of the second electrically controlled valve 610 is used to connect to the outside atmosphere, and each second electrically controlled valve 610 is electrically connected to the control component 400. The control component 400 is configured to, when the PCB board inspection device 10 is turned on, first control the corresponding second electrically controlled valve 610 to close, and then control the corresponding first electrically controlled valve 310 to open, so that the corresponding negative pressure interface and the main line 200 are connected; when the PCB board inspection device 10 is turned off, first control the corresponding first electrically controlled valve 310 to close, and then control the corresponding second electrically controlled valve 610 to open, so that the corresponding negative pressure interface is connected to the outside atmosphere through the second electrically controlled valve 610.

[0078] It can be understood that when the PCB board detection device 10 is turned off, the negative pressure adsorption can be released.

[0079] At this point, the control assembly 400 controls the first electrically controlled valve 310 to close and the second electrically controlled valve 610 to open, thereby releasing the negative pressure at the corresponding adsorption interface through the opened second electrically controlled valve 610. This releases the negative pressure at the adsorption port corresponding to the adsorption interface, thereby releasing the negative pressure adsorption. At the same time, the vacuum level of the main line 200 is not disrupted.

[0080] Exemplarily, the pressure relief assembly 600 further includes a first pipe filter 620, which is configured to filter the airflow flowing into the corresponding branch pipe 300 through the second electrically controlled valve 610. The first pipe filter 620 can be connected to the second end of the second electrically controlled valve 610; alternatively, the first pipe filter 620 can be connected between the first end of the second electrically controlled valve 610 and the corresponding branch pipe.

[0081] It should be noted that the first pipe filter 620 itself belongs to the existing technology, and its detailed structure is not described here.

[0082] In some embodiments, the vacuum device of the PCB board detection equipment also includes a duct muffler 700 and a second duct filter 800. The duct muffler 700 is arranged on the air outlet of the fan 100; the second duct filter 800 is arranged between the air intake of the fan 100 and the main line 200, and the second duct filter 800 is used to filter the air flow entering the fan 100 from the main line 200.

[0083] It should be noted that the pipe silencer 700 itself belongs to the prior art and is used to reduce or eliminate the noise generated when the air flows in the pipe. The second pipe filter 800 itself also belongs to the prior art and is used to filter the air flow in the corresponding pipe.

[0084] It is understandable that the second duct filter 800 helps to keep the fan 100 clean. The duct muffler 700 reduces the operating noise of the vacuum device of the PCB board testing equipment.

[0085] In some embodiments, reference Figure 1 and Figure 2 , a vacuum device of a PCB board detection equipment, wherein the fan 100 is a vortex fan.

[0086] It can be understood that the vortex blower itself is an existing technology. The vortex blower can generate a much higher pressure than an ordinary centrifugal fan (usually up to tens of kilopascals, or even more than 100kPa) in a smaller volume and power; the vortex blower adopts an oil-free design (the motor and the air path are isolated), and the exhausted air does not contain oil, which is conducive to air cleaning and suitable for the production environment of PCB boards; the vortex blower has fast startup and quick response. After its application in this application, it is conducive to the rapid response of this application.

[0087] In some embodiments, the vacuum device of the PCB board detection equipment also includes a third electrically controlled valve 900; the third electrically controlled valve 900 is arranged between the fan 100 and the main line 200, and the third electrically controlled valve 900 is used to control the on-off between the fan 100 and the main line 200, and the third electrically controlled valve 900 is electrically connected to the control component 400; the control component 400 is configured to, when all the first electrically controlled valves 310 are closed, control the third electrically controlled valve 900 to close, control the fan 100 to shut down, and the shutdown time of the fan 100 is no earlier than the closing time of the third electrically controlled valve 900.

[0088] As will be appreciated, when all first electrically controlled valves 310 are closed, this means that all PCB inspection equipment 10 in the workshop are in the off state, requiring the fan 100 to be shut down. After all first electrically controlled valves 310 are closed, the control assembly 400 controls the third electrically controlled valve 900 to close, and the control assembly 400 controls the fan 100 to shut down, with the fan 100 shutting down no earlier than the closing time of the third electrically controlled valve 900. This prevents pressure relief in the main line 200 through the fan after the fan 100 is shut down, thereby maintaining a certain vacuum level in the main line 200. This facilitates the rapid formation of negative pressure in the corresponding branch line 300 when a PCB inspection equipment 10 is restarted, further reducing energy consumption.

[0089] For example, when the fan 100 is started from a shutdown state, the third electrically controlled valve 900 needs to be opened after the fan 100 is started to avoid pressure relief of the main line 200 through the fan 100; the first electrically controlled valve 310 is opened after the third electrically controlled valve 900 is opened to ensure adsorption force.

[0090] The present application also provides a PCB board detection system, which includes multiple PCB board detection devices 10 and the vacuum device of the above-mentioned PCB board detection device.

[0091] It is understandable that the PCB board inspection system provided by this application has the characteristics of low noise in each PCB board inspection device, low overall energy consumption and space saving.

[0092] In some embodiments, the PCB board detection system further includes a soundproof chamber, and the fan 100 is disposed in the soundproof chamber.

[0093] It can be understood that by accommodating the fan 100 in the soundproof chamber, the impact of the fan 100 on the environment outside the soundproof chamber is further reduced.

[0094] For example, the soundproof chamber can be set up in a separate area in the workshop; the soundproof chamber can also be set up outside the workshop.

[0095] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of the present application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered merely as exemplary, and the true scope and spirit of the present application are indicated by the claims.

[0096] It should be understood that the present application is not limited to the exact structure described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A vacuum device for PCB board testing equipment, characterized in that: include: A fan (100), the fan (100) is used for vacuuming; a main pipe (200), the main pipe (200) being connected to the fan (100); A plurality of branch pipelines (300), each branch pipeline (300) being used to connect to a negative pressure interface of a PCB board detection device (10), each branch pipeline (300) being connected to the fan (100) via the main pipeline (200), and each branch pipeline (300) being provided with a first electrically controlled valve (310), the first electrically controlled valve (310) being used to control the connection and disconnection between the corresponding negative pressure interface and the main pipeline (200); A control component (400), the control component (400) being electrically connected to each of the PCB board detection devices (10), the fan (100) and each of the first electrically controlled valves (310) being electrically connected to the control component (400); The control component (400) is configured to control the power of the fan (100) and the opening and closing of the first electrically controlled valve (310) on the branch pipeline (300) corresponding to the PCB board detection device (10) according to the opening state of each PCB board detection device (10).

2. The vacuum device of the PCB board detection equipment according to claim 1, characterized in that: It also includes a plurality of negative pressure sensors (500), each of which is arranged on the branch pipe (300) in a one-to-one correspondence, and is located between the first electrically controlled valve (310) and the corresponding negative pressure interface. Each of the negative pressure sensors (500) is electrically connected to the control component (400); the negative pressure sensor (500) is configured to detect the negative pressure value of the corresponding negative pressure interface; The control component (400) is configured to, after the first electrically controlled valve (310) is opened, adjust the negative pressure value corresponding to the opened first electrically controlled valve (310) to a set value by controlling the power of the fan (100).

3. The vacuum device of the PCB board detection equipment according to claim 2, characterized in that: The device further comprises a plurality of alarm components, each of which is provided in a one-to-one correspondence with each of the PCB board detection devices (10). The control component (400) is configured to, after the first electrically controlled valve (310) is opened, control the first electrically controlled valve (310) to be closed if the negative pressure value corresponding to the opened first electrically controlled valve (310) is zero, and to control the alarm component corresponding to the first electrically controlled valve (310) to alarm.

4. The vacuum device of the PCB board detection equipment according to claim 2, characterized in that: The control component (400) comprises a host (410), a multi-channel analog module (420) and a frequency converter (430), wherein the multi-channel analog module (420) is electrically connected to each of the negative pressure sensors (500), the multi-channel analog module (420) is communicatively connected to the host (410), and the host (410) is electrically connected to each of the PCB board detection devices (10); The host (410) is configured to generate an analog signal according to the start state of the PCB board detection device (10), the negative pressure value, and the set value corresponding to the negative pressure value; The frequency converter (430) is electrically connected to the host (410), and the frequency converter (430) is electrically connected to the fan (100). The frequency converter (430) is configured to control the power supply frequency of the fan (100) according to the analog signal to control the power of the fan (100).

5. The vacuum device of the PCB board detection equipment according to claim 1, characterized in that: The device further comprises a plurality of pressure relief assemblies (600), wherein the pressure relief assemblies (600) comprise second electrically controlled valves (610), each of the second electrically controlled valves (610) being arranged on the branch pipeline (300) in a one-to-one correspondence, the first end of the second electrically controlled valve (610) being in communication with the branch pipeline (300), the communication position between the first end of the second electrically controlled valve (610) and the branch pipeline (300) being located between the negative pressure interface and the first electrically controlled valve (310), the second end of the second electrically controlled valve (610) being in communication with the outside atmosphere, and each of the second electrically controlled valves (610) being electrically connected to the control assembly (400); The control component (400) is configured to, when the PCB board detection device (10) is turned on, first control the corresponding second electrically controlled valve (610) to be closed, and then control the corresponding first electrically controlled valve (310) to be opened, so that the corresponding negative pressure interface and the main line (200) are in communication; and when the PCB board detection device (10) is turned off, first control the corresponding first electrically controlled valve (310) to be closed, and then control the corresponding second electrically controlled valve (610) to be opened, so that the corresponding negative pressure interface is in communication with the outside atmosphere via the second electrically controlled valve (610).

6. The vacuum device of the PCB board detection equipment according to claim 1, characterized in that: The invention also includes a duct silencer (700) and a second duct filter (800), wherein the duct silencer (700) is arranged on the air outlet of the fan (100); the second duct filter (800) is arranged between the air intake of the fan (100) and the main pipe (200), and the second duct filter (800) is used to filter the air flow entering the fan (100) from the main pipe (200).

7. The vacuum device of the PCB board detection equipment according to any one of claims 1 to 6, characterized in that: The fan (100) is a vortex fan.

8. The vacuum device of the PCB board detection equipment according to any one of claims 1 to 6, characterized in that: The system further comprises a third electrically controlled valve (900); the third electrically controlled valve (900) is arranged between the fan (100) and the main pipeline (200), and the third electrically controlled valve (900) is used to control the on-off between the fan (100) and the main pipeline (200). The third electrically controlled valve (900) is electrically connected to the control assembly (400); The control component (400) is configured to, when all the first electrically controlled valves (310) are closed, control the third electrically controlled valve (900) to close, and control the fan (100) to stop, and the fan (100) is stopped no earlier than the closing time of the third electrically controlled valve (900).

9. A PCB board detection system, characterized in that: The invention comprises a plurality of PCB board detection devices (10) and a vacuum device of the PCB board detection device according to any one of claims 1 to 8.

10. The PCB board detection system according to claim 9, characterized in that: It also includes a soundproof chamber, in which the fan (100) is arranged.

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