Vacuum negative pressure device

Abstract

The application discloses a vacuum negative pressure device, comprising an air inlet main pipe, at least two vacuum pump modules, an air outlet main pipe, the vacuum pump module comprising an air inlet branch pipe, a filter, a vacuum pump, an air outlet branch pipe and an exhaust pipe, so as to integrate the vacuum pump and the filter in one vacuum pump module, make the structure of the vacuum negative pressure device more compact, reduce the floor area and improve the flexibility of the installation mode. And the vacuum pump module can have three working modes, so that the filter of the other vacuum pump modules in the vacuum negative pressure device filters the air inlet of the vacuum pump module in the working mode two, or the filter of the vacuum pump module in the working mode three filters the gas entering the vacuum pump of the other vacuum pump modules, so as to realize that the vacuum pump or the filter in the standby vacuum pump module can be used as standby for the vacuum pump or the filter in the different vacuum pump modules according to the requirement, and the flexibility of the standby mode of the filter is improved.

Description

Technical Field

[0001] This application relates to the field of vacuum negative pressure technology, and in particular to a vacuum negative pressure device. Background Technology

[0002] Vacuum negative pressure devices act as negative pressure sources, using vacuum pumps to create the required negative pressure value in specific pipelines. For example, terminal pipelines can be installed in operating rooms, emergency rooms, treatment rooms, and various wards within a hospital, connecting each terminal pipeline to the vacuum negative pressure system. This allows suction to be generated at the terminal pipelines, removing sputum, blood, pus, and other contaminants from the patient's body.

[0003] Vacuum negative pressure devices are generally equipped with multiple vacuum pumps and multiple filters. Some of the vacuum pumps and filters are in operation, while the others are on standby. When the vacuum level produced by the operating vacuum pump is insufficient, or when the operating vacuum pump or filter fails or needs maintenance, the standby vacuum pump or filter can be activated.

[0004] Currently, most vacuum negative pressure devices on the market use a one-to-one configuration for the vacuum pump and filter, forming a fixed pair. When the vacuum pump or filter in one pair fails or requires maintenance, the entire set must be shut down, and the vacuum pump and filter in the other pair must be activated simultaneously. This results in a limited backup system for the vacuum pump or filter, leading to a waste of resources.

[0005] In addition, there is a current method of setting up each vacuum pump and each filter in sequence on the same horizontal plane. Since each vacuum pump occupies one area and each filter occupies another area, this method has a large footprint and poor installation flexibility. Utility Model Content

[0006] This application provides a vacuum negative pressure device that integrates a vacuum pump and a filter into a single vacuum pump module, making the structure of the vacuum negative pressure device more compact. Furthermore, different vacuum pump modules are connected by gas supply branch pipes and a gas supply main pipe, making it more flexible for the vacuum pumps and filters of different vacuum pump modules to serve as backups for each other.

[0007] The vacuum negative pressure device includes an inlet main pipe, at least two vacuum pump modules, and a gas delivery main pipe. Each vacuum pump module includes an inlet branch pipe, a filter, a vacuum pump, a gas delivery branch pipe, and an exhaust pipe. The vacuum pump has a vacuum pump inlet and a vacuum pump outlet, and the filter has a filter inlet and a filter outlet. In each vacuum pump module, the inlet branch pipe is connected to the filter inlet, the filter outlet is connected to the vacuum pump inlet, the filter outlet is also connected to the gas delivery branch pipe, and the vacuum pump inlet is also connected to the gas delivery branch pipe. The vacuum pump outlet is connected to the exhaust pipe. The source to be adsorbed is connected to the inlet main pipe, and the inlet main pipe is connected to each of the inlet branch pipes. The gas delivery main pipe is connected to each of the gas delivery branch pipes.

[0008] In some embodiments, each vacuum pump module includes an operating state and a non-operating state; the operating state of each vacuum pump module includes three operating modes: in operating mode one, the vacuum pump of the vacuum pump module is operating, and the filter of the vacuum pump module is operating and filtering the gas entering the vacuum pump of the vacuum pump module; in operating mode two, the vacuum pump of the vacuum pump module is operating, and the filter of the vacuum pump module is not operating; the gas entering the vacuum pump of the vacuum pump module comes from the filters of other vacuum pump modules in the vacuum negative pressure device; in operating mode three, the vacuum pump of the vacuum pump module is not operating, and the filter of the vacuum pump module is operating; the filter of the vacuum pump module filters the gas entering the vacuum pumps of other vacuum pump modules.

[0009] In some embodiments, the vacuum negative pressure device includes only a vacuum pump module in working mode one and a non-working vacuum pump module; or, the vacuum negative pressure device includes a vacuum pump module in at least two of the working modes of working mode one, working mode two, and working mode three.

[0010] In some embodiments, in operating mode one and operating mode three, the gas flow direction in the gas supply branch pipe of the vacuum pump module is from the end near the filter of the vacuum pump module to the end near the gas supply main pipe; in operating mode two, the gas flow direction in the gas supply branch pipe of the vacuum pump module is from the end near the gas supply main pipe to the end near the filter of the vacuum pump module.

[0011] In some embodiments, the filter inlet is provided with a first valve, the filter outlet is provided with a second valve, and the vacuum pump inlet is provided with a third valve; the first valve and the second valve are open when the filter is in operation, and the first valve and the second valve are closed when the filter is not in operation; the third valve is a normally open valve.

[0012] In some embodiments, a gas storage tank is also included, and the gas main is connected to the gas storage tank.

[0013] In some embodiments, the system further includes at least two sub-control devices, each of which is electrically connected to a vacuum pump; and a master control device, which is electrically connected to all of the sub-control devices.

[0014] In some embodiments, at least one mounting bracket is also included, the mounting bracket comprising at least two layers arranged vertically, each layer corresponding to one of the vacuum pump modules.

[0015] In some embodiments, when the number of the at least two vacuum pump modules does not exceed three, the vacuum negative pressure device includes a mounting bracket; the main inlet pipe and the main outlet pipe are both fixedly connected to the mounting bracket.

[0016] In some embodiments, an independent vacuum pump is also included; the number of vacuum pump modules is two; the mounting frame includes a three-layer frame, with each layer holding two vacuum pump modules and one independent vacuum pump; the air inlet of the independent vacuum pump is connected to the main air supply pipe through a branch pipe.

[0017] In some embodiments, when the number of the at least two vacuum pump modules exceeds three, the vacuum negative pressure device includes at least two mounting brackets.

[0018] In some embodiments, the intake manifold includes an intake manifold 1 and an intake manifold 2, and the air supply manifold includes an air supply manifold 1 and an air supply manifold 2; one intake manifold 1 and one air supply manifold 1 are fixed on each mounting bracket; the intake manifold 2 is connected to the intake manifold 1 on each mounting bracket, and the air supply manifold 2 is connected to the air supply manifold 1 on each mounting bracket.

[0019] In some embodiments, both the sub-control device and the main control device are fixed to the side of the mounting bracket; the number of sub-control devices on each mounting bracket is equal to the number of vacuum pumps on the mounting bracket.

[0020] In some embodiments, the system further includes at least two bases, each of which is provided with one of the vacuum pump modules.

[0021] In some embodiments, the system further includes at least two sub-control devices, each of which is electrically connected to a vacuum pump; it also includes a master control device, which is electrically connected to all the sub-control devices; one of the sub-control devices is fixed on each of the bases; and the master control device is set independently of the bases.

[0022] In some embodiments, the at least two vacuum pump modules are fixed to the gas storage tank.

[0023] In some embodiments, both the intake manifold and the delivery manifold are arranged along the axial direction of the gas storage tank.

[0024] In some embodiments, at least one independent vacuum pump is also included, which is fixed on the gas storage tank, and the inlet of the independent vacuum pump is connected to the main gas supply pipe through a gas supply branch pipe; the filters of the at least two vacuum pump modules filter the gas entering the independent vacuum pump.

[0025] By applying the above technical solutions, the vacuum negative pressure device includes an inlet main pipe, at least two vacuum pump modules, and a gas delivery main pipe. Each vacuum pump module includes an inlet branch pipe, a filter, a vacuum pump, a gas delivery branch pipe, and an exhaust pipe. This integrates the vacuum pump and filter into a single module, making the vacuum negative pressure device more compact, reducing its footprint, and improving installation flexibility. Furthermore, different vacuum pump modules are connected via gas delivery branch pipes and the main gas delivery pipe, allowing each module to operate in three modes. This enables filters in other vacuum pump modules to filter the intake air of a module operating in mode two, or filters in a module operating in mode three to filter the gas entering the vacuum pumps of other modules. This allows for backup vacuum pumps or filters in standby modules to be used as needed, improving the flexibility of filter backup methods. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of a frame-type vacuum negative pressure device according to an embodiment of this application;

[0028] Figure 2 This is a schematic diagram of the gas flow direction of the vacuum pump module in working mode one of the frame-type vacuum negative pressure device according to an embodiment of this application.

[0029] Figure 3 A schematic diagram of the gas flow direction of the vacuum pump module in working mode two in the frame-type vacuum negative pressure device of this application, which obtains the intake gas from the filter of other vacuum pump modules in the mounting frame.

[0030] Figure 4A schematic diagram of the gas flow direction in which the vacuum pump module in working mode two obtains air from the filter of another vacuum pump module in another mounting frame in the frame of the frame-type vacuum negative pressure device of this application.

[0031] Figure 5 A schematic diagram of the gas flow direction for the vacuum pump module in working mode three to provide air intake to the vacuum pumps of other vacuum pump modules in the mounting frame in the frame of this application embodiment of the frame vacuum negative pressure device.

[0032] Figure 6 A schematic diagram of the gas flow direction in which the vacuum pump module in working mode three provides air intake to the vacuum pump of another vacuum pump module in another mounting frame in the frame-type vacuum negative pressure device of this application embodiment;

[0033] Figure 7 This is a schematic diagram of a frame-type vacuum negative pressure device with an independent vacuum pump, according to an embodiment of this application.

[0034] Figure 8 This is a schematic diagram of the structure of a base-type vacuum negative pressure device according to an embodiment of this application;

[0035] Figure 9 This is a schematic diagram of the gas flow direction of the vacuum pump module in the base-type vacuum negative pressure device of this application in working mode one.

[0036] Figure 10 This is a schematic diagram of the gas flow direction of the vacuum pump module in working mode two of the base-type vacuum negative pressure device according to an embodiment of this application.

[0037] Figure 11 This is a schematic diagram of the gas flow direction of the vacuum pump module in working mode three of the base-type vacuum negative pressure device according to an embodiment of this application.

[0038] Figure 12 This is a schematic diagram of the structure of a gas storage tank type vacuum negative pressure device according to an embodiment of this application;

[0039] Figure 13 This is a schematic diagram of the gas flow direction of the vacuum pump module in the gas storage tank type vacuum negative pressure device of this application in working mode one.

[0040] Figure 14 This is a schematic diagram of the gas flow direction of the vacuum pump module in working mode two of the gas storage tank type vacuum negative pressure device according to an embodiment of this application.

[0041] Figure 15 This is a schematic diagram of the gas flow direction of the vacuum pump module in working mode three of the gas storage tank type vacuum negative pressure device according to an embodiment of this application.

[0042] Figures 1-15In the middle section, 110 is the main intake pipe; 111 is the first main intake pipe; 120 is the vacuum pump module; 121 is the intake branch pipe; 122 is the filter; 1221 is the first valve; 1222 is the second valve; 123 is the vacuum pump; 1231 is the third valve; 124 is the gas supply branch pipe; 125 is the exhaust pipe; 130 is the main gas supply pipe; 131 is the first main gas supply pipe; 140 is the sub-control device; 150 is the main control device; 160 is the gas storage tank; 170 is the mounting bracket; 180 is the base; and 190 is the independent vacuum pump. Detailed Implementation

[0043] Various embodiments and features of this application are described herein with reference to the accompanying drawings.

[0044] It should be understood that various modifications can be made to the embodiments described herein. Therefore, this specification should not be considered limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this application will be apparent to those skilled in the art.

[0045] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present application and, together with the general description of the present application given above and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0046] It should also be understood that although this application has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of this application.

[0047] Specific embodiments of this application are described thereafter with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of this application, which can be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that could obscure the application. Therefore, the specific structural and functional details described herein are not intended to be limiting, but merely serve as the basis and representative basis for the claims to teach those skilled in the art to use this application in a variety of substantially any suitable detailed structures.

[0048] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to this application.

[0049] An embodiment of this application provides a vacuum negative pressure device, including an inlet main pipe, at least two vacuum pump modules, and a gas delivery main pipe. Each vacuum pump module includes an inlet branch pipe, a filter, a vacuum pump, a gas delivery branch pipe, and an exhaust pipe, thus integrating the vacuum pump and filter into a single module. This makes the vacuum negative pressure device more compact, reduces its footprint, and improves installation flexibility. Furthermore, different vacuum pump modules are connected via gas delivery branch pipes and a gas delivery main pipe, allowing each module to operate in three modes. In one mode, filters from other vacuum pump modules can filter the intake air of a module operating in mode two; in another mode, filters the gas entering the vacuum pumps of other modules. This allows for backup vacuum pumps or filters in standby modules to be used as needed, improving the flexibility of filter backup.

[0050] like Figure 1 As shown, a frame-type vacuum negative pressure device is provided, which includes an air inlet main pipe 110, at least two vacuum pump modules 120, and an air delivery main pipe 130.

[0051] Vacuum pump module 120 includes an inlet branch pipe 121, a filter 122, a vacuum pump 123, a gas supply branch pipe 124, and an exhaust pipe 125. Vacuum pump 123 has a vacuum pump inlet and a vacuum pump outlet, and filter 122 has a filter inlet and a filter outlet. In each vacuum pump module 120, the inlet branch pipe 121 is connected to the filter inlet, the filter outlet is connected to the vacuum pump inlet, the filter outlet is also connected to the gas supply branch pipe 124, and the vacuum pump inlet is also connected to the gas supply branch pipe 124. The vacuum pump outlet is connected to the exhaust pipe 125.

[0052] The source to be adsorbed is connected to the main air intake pipe 110, and the main air intake pipe 110 is connected to each air intake branch pipe 121; the main gas supply pipe 130 is connected to each gas supply branch pipe 124.

[0053] The vacuum negative pressure device also includes a gas storage tank 160, and a gas transmission main pipe 130 is connected to the gas storage tank 160.

[0054] In this embodiment, the gas to be adsorbed may include one or more of the following: air, nitrogen, oxygen, carbon dioxide, and water vapor. A filter 122 is installed at the inlet of the vacuum pump 123 to filter the intake air, intercepting solid particles (such as dust and impurities), reducing mechanical wear, extending the lifespan of the vacuum pump 123, and reducing airflow disturbance and noise during exhaust. The vacuum pump 123 is used to draw in the gas from the source to be adsorbed, creating a negative pressure at the source, and then exhausting the gas from the vacuum pump 123 through the exhaust pipe 125.

[0055] For example, the vacuum negative pressure device of this application can be applied to operating rooms, emergency rooms, treatment rooms and wards in hospitals. The main air inlet pipe is connected to the hospital's terminal pipeline, and suction can be generated at the terminal pipeline to remove sputum, blood, pus and other contaminants from the patient's body.

[0056] In the initial stage of starting the vacuum negative pressure device, air is first drawn from the gas storage tank 160 to bring it to the required negative pressure state. Then, the vacuum negative pressure device draws air from the adsorption source through the main air inlet pipe 110 to generate an attraction force on the adsorption source. Afterward, the gas storage tank 160 plays a role in stabilizing the negative pressure in the entire vacuum negative pressure device.

[0057] When the vacuum requirement changes or the vacuum level fluctuates due to changes in the vacuum pump module 120, the gas storage tank 160 can provide a certain vacuum level, allowing a portion of the gas drawn in from the main inlet pipe 110 to enter the gas storage tank 160, thus ensuring that the vacuum negative pressure device can provide a stable negative pressure. In this embodiment, by setting up the gas storage tank 160 and connecting the main gas supply pipe 130 to the gas storage tank 160, the stability of the vacuum level of the vacuum negative pressure device can be improved. The gas storage tank 160 can be located on one side of each vacuum pump module 120, or below or above each vacuum pump module 120.

[0058] The vacuum negative pressure device may also be without the gas storage tank 160. In that case, the function of the main gas supply pipe 130 is to connect all the gas supply branch pipes 124 to form a continuous gas pipeline.

[0059] Each vacuum pump module 120 includes an operating state and a non-operating state. The operating state of each vacuum pump module 120 includes three operating modes (as follows). Figure 1 (Taking the vacuum pump module 120 located at the top of the right mounting bracket as an example):

[0060] In working mode one, vacuum pump 123 of vacuum pump module 120 is working, and filter 122 of vacuum pump module 120 is working and filtering the gas entering vacuum pump 123 of vacuum pump module 120.

[0061] In operating mode two, vacuum pump 123 of vacuum pump module 120 is working, and filter 122 of vacuum pump module 120 is not working; the gas entering vacuum pump 123 of vacuum pump module 120 comes from the filters of other vacuum pump modules in the vacuum negative pressure device that are in operation.

[0062] In operating mode three, vacuum pump 123 of vacuum pump module 120 is not working, and filter 122 of vacuum pump module 120 is working; filter 122 of vacuum pump module 120 filters the gas entering the vacuum pump of other vacuum pump modules.

[0063] In this embodiment, for the vacuum pump module 120 in working mode one (e.g. Figure 2 The vacuum pump module 120, located at the top of the right-hand mounting bracket, has its filter 122 and vacuum pump 123 in operation. Gas from the adsorption source enters the filter 122 via the main inlet pipe 110 and the branch inlet pipe 121. After filtration, the gas enters the vacuum pump 123 in one path and the main gas supply pipe 130 via the branch inlet pipe 124, thus connecting to the gas storage tank and other vacuum pump modules. The vacuum pump 123 exhausts gas through the corresponding exhaust pipe 125.

[0064] For vacuum pump module 120 in operating mode two, its filter 122 is in a non-operating state, and vacuum pump 123 is in an operating state. The intake air, filtered by the filter of the other vacuum pump module in operation, is obtained from the main intake pipe 130 through the gas supply branch pipe 124, and the intake air is input into vacuum pump 123. Vacuum pump 123 exhausts gas through the corresponding exhaust pipe 125.

[0065] For vacuum pump module 120 in working mode 3, its filter 122 is in working state and vacuum pump 123 is in non-working state. The gas in the source to be adsorbed reaches filter 122 from the main inlet pipe 110 through the inlet branch pipe 121. The gas filtered by filter 122 enters the main gas supply pipe 130 through the gas supply branch pipe 124, and then enters the vacuum pump of other vacuum pump modules through the main gas supply pipe 130.

[0066] The vacuum pump not working could be due to it being in standby or under maintenance, and the filter not working could be due to it being in standby or under maintenance.

[0067] Understandably, when a vacuum pump module is not in operation, neither the vacuum pump nor the filter within that module will work. In this case, the vacuum pump and the filter can be in standby or maintenance mode.

[0068] When a vacuum pump module is in working condition, it means that at least one of the vacuum pump and the filter in the vacuum pump module is working, that is, the vacuum pump is working and the filter is working, or the vacuum pump is not working and the filter is working, or the vacuum pump is working and the filter is not working. In this case, the non-working filter can be used as a backup filter, and the non-working vacuum pump can be used as a backup vacuum pump.

[0069] Based on the three working modes of the vacuum pump module 120 mentioned above, the operation mode of the frame-type vacuum negative pressure device is as follows (taking... Figure 1 Taking the vacuum pump module 120 located at the top of the right-hand mounting bracket as an example, other components not involved or gas flow paths on the vacuum pump module are not shown in the figure:

[0070] In scenario (1), the vacuum pump module 120 is in operating mode one, with both its vacuum pump and filter working. The gas flow path is as follows: the gas from the source to be adsorbed passes sequentially through the main inlet pipe and the inlet branch pipe of the vacuum pump module to the filter of the vacuum pump module. After filtration, one path enters the vacuum pump in the vacuum pump module and is discharged through the exhaust pipe, while the other path passes through the gas delivery branch pipe to the main gas delivery pipe and is then transported to the gas storage tank and other vacuum pump modules via the main gas delivery pipe. For example, as shown... Figure 2 As shown, the uppermost vacuum pump module in the right mounting bracket is in operating mode one, and its gas flow direction is as follows: Figure 2 As shown by the thick arrow in the image.

[0071] In scenario (2), the vacuum pump module in operating mode two of the frame-type vacuum negative pressure device receives air intake from the filters of other vacuum pump modules in the same mounting bracket. For example, such as... Figure 3 As shown, the vacuum pump module 120 on the top layer of the right mounting bracket is in operating mode two, where the vacuum pump of this module 120 is operational but the filter is not. The vacuum pump of this module 120 obtains its air intake from the filter of the vacuum pump module on the middle layer of the right mounting bracket. Figure 3 As indicated by the thick arrow, the gas flow direction is as follows: the gas in the source to be adsorbed enters the filter of the middle layer vacuum pump module on the right mounting frame through the main inlet pipe and the branch inlet pipe. After being filtered by the filter, the gas enters the vacuum pump of the uppermost vacuum pump module 120 on the right mounting frame through the branch pipe, and the other path is connected to the gas storage tank and other vacuum pump modules through the main inlet pipe.

[0072] In scenario (3), the vacuum pump module in operating mode two of the frame-type vacuum negative pressure device receives air intake from the filter of another vacuum pump module in another mounting bracket. For example, such as... Figure 4 As shown, the vacuum pump module 120 on the top layer of the right mounting bracket is in operating mode two. The vacuum pump of this module 120 is operating, but the filter is not. The vacuum pump of this module 120 obtains its air intake from the filter of the vacuum pump module on the top layer of the left mounting bracket. Figure 4 As indicated by the thick arrow, the gas flow direction is as follows: the gas in the adsorption source enters the main inlet pipe of the left mounting frame, and then reaches the filter of the uppermost vacuum pump module of the left mounting frame through the inlet branch pipe. The gas filtered by the filter enters the main inlet pipe through the gas delivery branch pipe, and then enters the vacuum pump of the uppermost vacuum pump module of the right mounting frame through the main inlet pipe and the gas delivery branch pipe. The other path is connected to the gas storage tank and other vacuum pump modules.

[0073] In scenario (4), in the frame-type vacuum negative pressure device, the vacuum pump module in operating mode three provides air intake to the vacuum pumps of other vacuum pump modules in the same mounting bracket. For example, such as... Figure 5As shown, the topmost vacuum pump module 120 on the right mounting bracket is in operating mode three, where the vacuum pump of this module 120 is not operating, but the filter is operating. The filter of this module 120 supplies air intake to the vacuum pump of the middle layer vacuum pump module on the right mounting bracket. Figure 5 As indicated by the thick arrow, the gas flow direction is as follows: the gas in the source to be adsorbed enters the main inlet pipe of the right mounting bracket, the gas in the main inlet pipe of the right mounting bracket enters the top filter of the right mounting bracket, the filtered gas enters the vacuum pump of the vacuum pump module in the middle layer of the right mounting bracket in one direction, and enters the main gas supply pipe through the gas supply branch pipe in another direction. The gas in the main gas supply pipe is connected to the gas storage tank and other vacuum pump modules.

[0074] In scenario (5), in a frame-type vacuum negative pressure device, the vacuum pump module in operating mode three provides air intake to the vacuum pump of another vacuum pump module in another mounting bracket. For example, such as... Figure 6 As shown, the uppermost vacuum pump module 120 on the right mounting bracket is in operating mode three, where the vacuum pump of this module 120 is not operating, but the filter is operating. The filter of this module 120 supplies air intake to the vacuum pump of the uppermost vacuum pump module on the left mounting bracket. Figure 6 As indicated by the thick arrow, the gas flow direction is as follows: the gas in the source to be adsorbed enters the main inlet pipe of the right mounting bracket, the gas in the main inlet pipe of the right mounting bracket enters the filter of the vacuum pump module at the top of the right mounting bracket, the filtered gas enters the vacuum pump of the vacuum pump module at the top of the left mounting bracket through the gas supply branch pipe and the gas supply main pipe, and the other gas enters the gas supply main pipe through the gas supply branch pipe. The gas in the gas supply main pipe is connected to the gas storage tank and other vacuum pump modules.

[0075] It is understandable that the vacuum pump module where the backup vacuum pump is located can be a vacuum pump module where the filter is working and the vacuum pump is not working, or a vacuum pump module where neither the filter nor the vacuum pump is working.

[0076] Therefore, the vacuum negative pressure device of this application integrates the vacuum pump 123 and the filter 122 into a single vacuum pump module 120, making the structure of the vacuum negative pressure device more compact, reducing the floor space, and improving the flexibility of the installation method. Furthermore, different vacuum pump modules are connected by gas supply branch pipes and a main gas supply pipe, enabling the vacuum pump module to have three operating modes. This allows the filters of other vacuum pump modules in the vacuum negative pressure device to filter the intake air of the vacuum pump module in operating mode two, and also allows the non-operating vacuum pumps of other vacuum pump modules in the vacuum negative pressure device to work in conjunction with the filters of the vacuum pump module in operating mode three. This allows the vacuum pumps or filters in the standby vacuum pump module to be used as backups for vacuum pumps or filters in different vacuum pump modules as needed, improving the flexibility of filter backup methods.

[0077] In some embodiments of this application, in working mode one and working mode three, the gas flow direction in the gas supply branch pipe 124 of the vacuum pump module 120 is from one end near the filter 122 of the vacuum pump module 120 to one end near the main gas supply pipe 130.

[0078] In operating mode two, the gas flow direction in the gas supply branch pipe 124 of the vacuum pump module 120 is from one end near the gas supply main pipe 130 to one end near the filter 122 of the vacuum pump module 120.

[0079] In this embodiment, in operating mode one, both the filter 122 and the vacuum pump 123 in the vacuum pump module 120 are in operation. The gas filtered by the filter 122 enters the vacuum pump 123 via one path and then flows through the gas branch pipe 124 into the main gas supply pipe 130 to provide filtered gas for other vacuum pump modules, and is in fluid communication with the gas storage tank. In operating mode three, the filter 122 in the vacuum pump module 120 is in operation, while its vacuum pump is not in operation. The gas filtered by the filter 122 enters the main gas supply pipe 130 through the gas branch pipe 124 to provide filtered gas for other vacuum pump modules and the standby vacuum pump, and is in fluid communication with the gas storage tank. Therefore, in operating modes one and three, the gas flow direction in the gas branch pipe 124 of the vacuum pump module 120 is from the end near the main gas supply pipe 130 to the end near the filter 122 of the vacuum pump module 120.

[0080] In operating mode two, the filter 122 in the vacuum pump module 120 is not working, and its vacuum pump 123 is working. It cannot obtain air intake from its own filter 122. The gas from the filters of other vacuum pump modules will enter the vacuum pump 123 of the vacuum pump module 120 through the gas supply main pipe 130 and the gas supply branch pipe 124. Therefore, the gas flow direction in the gas supply branch pipe 124 is from one end of the gas supply main pipe 130 to the end close to the filter 122 of the vacuum pump module 120.

[0081] By changing the gas flow direction in the gas supply branch pipe 124 under different working modes, it is ensured that the vacuum pump module 120, which is not working with the filter 122, can obtain filtered gas. It is also ensured that the vacuum pump module, which is still working with the filter but not working with the vacuum pump, can work in conjunction with the backup vacuum pump of other vacuum pump modules, thereby improving the reliability and flexibility of the vacuum negative pressure device.

[0082] In some embodiments of this application, a first valve 1221 is provided at the filter inlet, a second valve 1222 is provided at the filter outlet, and a third valve 1231 is provided at the vacuum pump inlet; the first valve 1221 and the second valve 1222 are open when the filter 122 is in the working state, and the first valve 1221 and the second valve 1222 are closed when the filter 122 is not in the working state. The third valve 1231 is a normally open valve.

[0083] In this embodiment, by setting a first valve 1221 and a second valve 1222 at the inlet and outlet of the filter 122 respectively, the state of the filter 122 can be reliably switched, making it convenient for the filter 122 to be used as a standby or for maintenance and isolation.

[0084] Each vacuum pump 123 has a built-in one-way valve at its inlet, which can automatically open or close the inlet gas path depending on whether the vacuum pump is in operation. (1) For vacuum pumps that are not malfunctioning and can be used normally, the third valve connected to the inlet of the vacuum pump is always open, regardless of whether the vacuum pump is in operation or not (standby). This setting allows the system to automatically control the standby vacuum pump to start when the vacuum demand increases or when a working vacuum pump cannot continue to be used. At this time, there is no need to manually open the corresponding third valve, which improves the self-adaptive capability of the vacuum negative pressure device. Moreover, since the vacuum pump has a built-in one-way valve at its inlet, when the vacuum pump is not in operation, even if the third valve is always open, gas cannot enter the vacuum pump. (2) For vacuum pumps that are malfunctioning and cannot continue to be used, the third valve must be manually closed in order to repair or replace the malfunctioning vacuum pump. By installing a normally open third valve 1231 on the inlet pipe of vacuum pump 123, vacuum pump 123 and related pipelines can be reliably isolated when it is necessary to isolate vacuum pump 123 (such as when it is necessary to repair or replace vacuum pump); and when it is necessary to connect vacuum pump 123 (such as when it is necessary to activate standby vacuum pump), the immediate activation of standby vacuum pump and related pipelines is not affected.

[0085] In some embodiments of this application, reference is made to Figure 2 and Figure 3The vacuum negative pressure device also includes at least two sub-control devices 140, each sub-control device 140 being electrically connected to a vacuum pump 123 for controlling the start, operation, or stop of the vacuum pump; it also includes a central control device 150, which is electrically connected to all sub-control devices 140. In this embodiment, the sub-control devices 140 may include start / stop buttons, automatic / manual switching buttons, status indicator lights, parameter displays, etc., for the corresponding vacuum pump module 120, while the central control device 150 may include a central control display screen capable of human-machine interaction. By setting sub-control devices 140 for each vacuum pump module 120, individual control of the corresponding vacuum pump module 120 is achieved, meeting the user's needs for using different vacuum pump modules 120. By setting the central control device 150, overall control of multiple vacuum pump modules 120 is achieved, thereby controlling each vacuum pump module 120 more efficiently.

[0086] In some embodiments of this application, such as Figure 1 As shown, the vacuum negative pressure device also includes at least one mounting frame 170, which includes at least two layers of frames arranged vertically, with each layer corresponding to a vacuum pump module 120.

[0087] In this embodiment, by setting up the mounting bracket 170, the vacuum pump modules 120 are stacked, making the structure of the vacuum negative pressure device more compact and reducing the floor space occupied.

[0088] It can be seen that, Figure 1 It includes two mounting brackets 170, each mounting bracket 170 includes three layers of frame, and a total of six vacuum pump modules 120 are set. For example, when the vacuum negative pressure device is running, four vacuum pumps 123 can be in operation, two vacuum pumps 123 can be on standby (i.e. not in operation), three filters 122 can be in operation, and three filters 122 can be on standby (i.e. not in operation).

[0089] For example, Figure 1 The three vacuum pumps and three filters on the right mounting bracket are working, the top vacuum pump on the left mounting bracket is working, and the three filters on the left mounting bracket are not working. When the vacuum negative pressure device is started, the three vacuum pump modules on the right mounting bracket are all in working mode one, the top vacuum pump module on the left mounting bracket is in working mode two, and the vacuum pumps in the middle and bottom layers on the left mounting bracket are not working. At this time, the vacuum negative pressure device has vacuum pump modules in working mode one and working mode two, as well as vacuum pumps that are not working.

[0090] When the filter on the top layer of the right mounting bracket stops working and the filter on the bottom layer of the left mounting bracket is activated, the vacuum pump module on the top layer of the right mounting bracket switches to working mode two, and the vacuum pump module on the bottom layer of the left mounting bracket switches to working mode three. At this time, the vacuum negative pressure device has vacuum pump modules in working mode one, working mode two, and working mode three, as well as a vacuum pump that is not working.

[0091] The filter in operation can supply air to the main gas supply pipe 130 through its corresponding branch pipe. If the vacuum pump corresponding to the standby filter is in operation, it can obtain air from the main gas supply pipe 130 through its corresponding branch pipe. Optionally, due to the presence of the main gas supply pipe 130 and the branch pipes, the filter in this mounting bracket 170 can supply filtered gas to the vacuum pump of the same vacuum pump module or other vacuum pump modules in this mounting bracket 170, and the filter in this mounting bracket 170 can also supply filtered gas to the vacuum pumps in other mounting brackets 170.

[0092] Mounting bracket 170 may also include two layers, correspondingly two vacuum pump modules. In one scenario, both the vacuum pump and filter of the upper vacuum pump module are operational, while neither the vacuum pump nor the filter of the lower vacuum pump module is operational. In this case, the vacuum negative pressure device includes both the vacuum pump module operating in mode one and the inactive vacuum pump module. When the filter of the upper vacuum pump module stops operating and the filter of the lower vacuum pump module is activated, the upper vacuum pump module switches to operating mode two, and the lower vacuum pump module switches to operating mode three. In this case, the vacuum negative pressure device includes both the vacuum pump module operating in mode two and the vacuum pump module operating in mode three.

[0093] As can be seen from the above description, based on the number of mounting brackets and the number of vacuum pump modules on the mounting brackets, the vacuum negative pressure device may only include a vacuum pump module in working mode one and a non-working vacuum pump module; or, the vacuum negative pressure device may include vacuum pump modules in at least two of the working modes of working mode one, working mode two, and working mode three.

[0094] The working modes of the vacuum pump module in the vacuum negative pressure device are not detailed above. The independent or concurrent existence of any working mode that can be known based on the disclosure of this application is within the protection scope of this application.

[0095] In some embodiments of this application, when the number of at least two vacuum pump modules 120 does not exceed three, the vacuum negative pressure device includes a mounting bracket 170; the main air inlet pipe 110 and the main air outlet pipe 130 are both fixedly connected to the mounting bracket 170.

[0096] In this embodiment, when the number of vacuum pump modules 120 does not exceed three, two or three layers of frame can be set on a mounting bracket 170, and each vacuum pump module 120 can be placed on each layer of frame, thereby effectively reducing the floor space. By fixing the inlet main pipe 110 and the outlet main pipe 130 to the mounting bracket 170, the stability of the inlet main pipe 110 and the outlet main pipe 130 can be improved, thereby improving the operational reliability of the vacuum negative pressure device.

[0097] In some embodiments of this application, when the number of at least two vacuum pump modules 120 exceeds three, the vacuum negative pressure device includes at least two mounting brackets 170.

[0098] In this embodiment, when the number of vacuum pump modules 120 exceeds three, each vacuum pump 123 is placed by at least two mounting brackets 170. This avoids the vacuum negative pressure device from being too high due to the excessive height of a single mounting bracket 170, thus improving safety and reducing installation complexity.

[0099] In some embodiments of this application, the intake manifold 110 includes an intake manifold 111 and an intake manifold 2 (not shown in the figure), and the air supply manifold 130 includes an air supply manifold 131 and an air supply manifold 2 (not shown in the figure); one intake manifold 111 and one air supply manifold 131 are fixed on each mounting bracket 170; the intake manifold 2 is connected to the intake manifold 111 on each mounting bracket 170, and the air supply manifold 2 is connected to the air supply manifold 131 on each mounting bracket 170.

[0100] The second intake manifold is connected to the intake manifold 111 on each mounting bracket 170, and the second delivery manifold is connected to the delivery manifold 131 on each mounting bracket 170. This enables communication between the intake sides of each vacuum pump module 120 in different mounting brackets 170 and between the outlets of each filter. Thus, the filter 122 working in this mounting bracket 170 can provide filtered gas to the vacuum pump 123 in other mounting brackets 170, or the filter working in this mounting bracket 170 can work in conjunction with the vacuum pump in other mounting brackets. This allows for more flexible control of the status of each vacuum pump module 120 in different mounting brackets 170.

[0101] In one embodiment, the frame-type vacuum negative pressure device further includes an independent vacuum pump 190. There are two vacuum pump modules 120, and the mounting frame 170 includes three layers, each layer holding two vacuum pump modules 120 and one independent vacuum pump 190; the air inlet of the independent vacuum pump 190 is connected to the main air supply pipe 130 via a branch pipe. For example, as... Figure 7As shown, a vacuum pump module is placed on the top and middle layers of the right mounting bracket. The vacuum pump on the bottom layer of the right mounting bracket is an independent vacuum pump 190. The inlet of the independent vacuum pump 190 does not have a filter 122. Instead, it is directly connected to the main gas supply pipe 130 through a gas supply branch pipe to obtain air intake from the filter working in the vacuum negative pressure device. Since there is no need to set a separate filter for the independent vacuum pump 190, the equipment cost is reduced while ensuring the normal operation of the vacuum negative pressure device.

[0102] In some embodiments of this application, both the sub-control device 140 and the main control device 150 are fixed to the side of the mounting bracket 170; the number of sub-control devices 140 on each mounting bracket 170 is equal to the number of vacuum pump modules 120 on that mounting bracket 170.

[0103] When the vacuum negative pressure device includes an independent vacuum pump, a sub-control unit 140 is electrically connected to an independent vacuum pump to control the start, operation, or stop of the independent vacuum pump. The number of sub-control units 140 on each mounting bracket 170 is the same as the sum of the number of vacuum pump modules and independent vacuum pumps on that mounting bracket 170. Figure 7 As shown, the right mounting bracket 170 of the frame-type vacuum negative pressure device includes two vacuum pump modules and one independent vacuum pump. Therefore, there are three control devices 140 on the right mounting bracket 170, each controlling one of the two vacuum pump modules and the independent vacuum pump. The left mounting bracket 170 includes three vacuum pump modules but no independent vacuum pump. Therefore, there are three control devices 140 on the left mounting bracket 170, each controlling one of the three vacuum pump modules. In other words, the number of control devices 140 on each mounting bracket 170 is equal to the total number of vacuum pumps on that mounting bracket 170.

[0104] In this embodiment, by fixing both the sub-control device 140 and the main control device 150 to the side of the mounting frame 170, and setting each sub-control device 140 in each mounting frame 170 in correspondence with each vacuum pump, the sub-control device 140 and the main control device 150 are integrated on the mounting frame 170, thereby improving the integration of the vacuum negative pressure device.

[0105] In some embodiments of this application, as an alternative to the mounting bracket type, the vacuum negative pressure device further includes at least two bases 180, forming a base-type vacuum negative pressure device, with a vacuum pump module 120 disposed on each base 180, such as... Figure 8 As shown, apart from the difference in installation method, the other features of the base-type vacuum negative pressure device are the same as those of the frame-type vacuum negative pressure device.

[0106] In this embodiment, the vacuum negative pressure device further includes at least two bases 180, and a vacuum pump module 120 is disposed on each base 180 (as an example, Figure 8Two bases and their corresponding vacuum pump modules are shown. Each base 180 is set on the same horizontal plane or at different heights as needed, and is connected to the main air inlet pipe 110 and the main air outlet pipe 130. Figure 8 (Not shown) Connects to each vacuum pump module 120 on each base 180, thereby allowing flexible control of each vacuum pump module 120. Optionally, depending on the positional distribution of each base 180, the vacuum pump modules 120 can be arranged in one or more rows.

[0107] For example, for a base-mounted vacuum negative pressure device, Figure 8 Taking the vacuum pump module 120 with base 180 on the right side as an example, its three working modes will be explained, such as... Figure 9 As shown, in working mode one, both the vacuum pump 123 and the filter 122 of the right vacuum pump module 120 are working. The gas flow path is as follows: the gas from the source to be adsorbed passes sequentially through the main inlet pipe of the vacuum pump module 120, the inlet branch pipe 121 of the vacuum pump module, and reaches the filter 122 of the vacuum pump module. After being filtered by the filter 122, one path goes downward into the vacuum pump 123 in the vacuum pump module and is discharged through the exhaust pipe 123. The other path goes upward through the gas supply branch pipe 124 to the main gas supply pipe, and then connects to the gas storage tank 160 and other vacuum pump modules through the main gas supply pipe.

[0108] like Figure 10 As shown, in working mode two, the vacuum pump 123 of the vacuum pump module 120 is working, the filter 122 is not working, and the gas flow path is as follows: the gas from the source to be adsorbed passes through the main inlet pipe and the branch inlet pipe of the left vacuum pump module in sequence to the filter of the left vacuum pump module. After being filtered by the filter, it enters the main gas supply pipe. Then one path goes through the branch inlet pipe to the vacuum pump 123 of the right vacuum pump module 120, and the other path goes through the main gas supply pipe to connect with the gas storage tank 160 and other vacuum pump modules.

[0109] like Figure 11 As shown, in working mode three, the vacuum pump 123 of the right vacuum pump module 120 is not working, the filter 122 is working, and the gas flow path is as follows: the gas from the source to be adsorbed passes sequentially through the main inlet pipe of the right vacuum pump module 120, the inlet branch pipe 121 of the vacuum pump module, and reaches the filter 122 of the vacuum pump module. After being filtered by the filter 122, the gas flows upward through the gas supply branch pipe 124 to the main gas supply pipe. Then, one path goes through the gas supply branch pipe to the vacuum pump of the left vacuum pump module, and the other path goes through the main gas supply pipe to connect with the gas storage tank 160 and other vacuum pump modules.

[0110] In some embodiments of this application, a sub-control device 140 is fixed on each base 180; the main control device 150 is set independently of the base 180, thereby integrating each sub-control device 140 onto the base 180, improving the integration of the vacuum negative pressure device. Furthermore, by setting the main control device 150 independently of the base 180, the size of the device on a single base is reduced, facilitating more flexible installation and control of each base-mounted vacuum pump module 120.

[0111] In some embodiments of this application, as an alternative to the mounting bracket form, such as Figure 12 As shown, at least two vacuum pump modules 120 are fixed to the gas storage tank 160, forming a gas storage tank type vacuum negative pressure device. Except for the requirement to have a gas storage tank and the difference in installation method, the other features of the gas storage tank type vacuum negative pressure device are the same as those of the frame type vacuum negative pressure device.

[0112] By fixing the two vacuum pump modules 120 onto the gas storage tank 160, the footprint of the vacuum negative pressure device can be reduced, and the integration of the vacuum negative pressure device can be improved.

[0113] In some embodiments of this application, such as Figure 3 As shown, both the intake manifold 110 and the delivery manifold 130 are arranged along the axial direction of the gas storage tank 160.

[0114] By arranging the main inlet pipe 110 and the main outlet pipe 130 along the axial direction of the gas storage tank 160, the height of the vacuum negative pressure device can be reduced, thereby reducing the vertical space occupied by the vacuum negative pressure device. Furthermore, this arrangement of the main inlet pipe 110 and the main outlet pipe 130 facilitates connection to each vacuum pump module via the inlet branch pipe and the outlet branch pipe, making the pipeline layout of the vacuum negative pressure device clear and convenient for subsequent inspection and maintenance.

[0115] In some embodiments of this application, such as Figure 13 As shown, the vacuum negative pressure device also includes at least one independent vacuum pump 190, which is fixed on the gas storage tank 160. The inlet of the independent vacuum pump 190 is connected to the gas supply main pipe 130 through a gas supply branch pipe 124. The filters 122 of at least two vacuum pump modules 120 filter the gas entering the independent vacuum pump 190.

[0116] In this embodiment, the inlet of the independent vacuum pump 190 does not have a filter 122. Instead, it is directly connected to the main gas supply pipe 130 through a gas supply branch pipe 124 to obtain air intake from the filter 122 working in the vacuum pump module 120. Since there is no need to set a separate filter 122 for the independent vacuum pump 190, the equipment cost is reduced while ensuring the normal operation of the vacuum negative pressure device.

[0117] In some embodiments of this application, the gas flow direction in the gas supply branch pipe 124 connected to the independent vacuum pump 190 remains unchanged, thereby ensuring that the independent vacuum pump 190 reliably obtains gas from the gas supply main pipe 130 during operation, and improving the reliability of the independent vacuum pump.

[0118] For example, for a gas storage tank type vacuum negative pressure device, such as Figures 13-15 As shown, it includes two vacuum pump modules 120 and one independent vacuum pump 190. Two vacuum pumps are in operation, and one is on standby. Two filters are used, one is on standby. Figure 13 As shown, the rightmost vacuum pump module is in working mode one. The gas flow direction is as follows: the gas from the source to be adsorbed passes through the main inlet pipe and the inlet branch pipe of the rightmost vacuum pump module to the filter. The gas filtered by the filter enters the vacuum pump in the rightmost vacuum pump module downward and is discharged through the exhaust pipe. The other path goes backward through the gas supply branch pipe to the main gas supply pipe, and is then transported to the gas storage tank and the independent vacuum pump through the main gas supply pipe.

[0119] like Figure 14 As shown, the rightmost vacuum pump module is in operating mode two. The gas from the source to be adsorbed passes sequentially through the main inlet pipe and the inlet branch pipe of the leftmost vacuum pump module to the filter. The filtered gas then passes through the branch pipe to the main inlet pipe and is delivered to the independent vacuum pump and the vacuum pump of the rightmost vacuum pump module. In this case, the leftmost vacuum pump module is in operating mode three.

[0120] like Figure 15 As shown, the rightmost vacuum pump module is in working mode three. The gas flow direction is as follows: the gas from the source to be adsorbed passes through the main inlet pipe and the inlet branch pipe of the rightmost vacuum pump module to the filter. The gas filtered by the filter passes through the gas delivery branch pipe to the main gas delivery pipe, and is then delivered to the gas storage tank, the independent vacuum pump and the vacuum pump of the leftmost vacuum pump module through the main gas delivery pipe.

[0121] The gas tank type vacuum negative pressure device also includes multiple sub-control units 140 and a central control unit 150. The number of sub-control units 140 is consistent with the sum of the number of vacuum pump modules and independent vacuum pumps, and each sub-control unit 140 is used to control the start, operation, and stop of each vacuum pump. Figure 12 In this system, the gas storage tank type vacuum negative pressure device includes two vacuum pump modules and one independent vacuum pump. There are three sub-control devices 140, each controlling one of the two vacuum pump modules and the independent vacuum pump. The multiple sub-control devices 140 and one central control device 150 are fixed to the gas storage tank via a bracket.

[0122] Furthermore, although exemplary embodiments have been described herein, their scope includes any and all embodiments based on this disclosure that have equivalent elements, modifications, omissions, combinations (e.g., schemes involving intersections of various embodiments), adaptations, or alterations. Elements in the claims will be interpreted broadly based on the language used in the claims and are not limited to the examples described in this specification or during the implementation of this application, and such examples will be interpreted as non-exclusive. Therefore, this specification and examples are intended to be considered illustrative only, and the true scope and spirit are indicated by the full scope of the following claims and their equivalents.

[0123] The above description is intended to be illustrative and not restrictive. For example, the above examples (or one or more of them) can be used in combination with each other. Other embodiments can be used by those skilled in the art when reading the above description. Furthermore, in the above detailed description, various features may be grouped together to simplify the disclosure. This should not be construed as an intention that a feature of the disclosure that is not claimed is necessary for any claim. Rather, the subject matter of this disclosure may be less than all the features of a particular disclosed embodiment. Thus, the following claims are incorporated herein by reference as examples or embodiments, wherein each claim is an independent, separate embodiment, and these embodiments are contemplated to be combined with each other in various combinations or arrangements.

[0124] The scope of this disclosure should be determined by referring to the full scope of the appended claims and their equivalents. The above embodiments are merely exemplary embodiments of this disclosure and are not intended to limit this disclosure; the scope of protection of this disclosure is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this disclosure within its substance and scope, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this disclosure.

Claims

1. A vacuum negative pressure device, characterized in that, Includes an intake manifold, at least two vacuum pump modules, and a gas delivery manifold; The vacuum pump module includes an inlet branch pipe, a filter, a vacuum pump, a gas supply branch pipe, and an exhaust pipe. The vacuum pump has a vacuum pump inlet and a vacuum pump outlet, and the filter has a filter inlet and a filter outlet. In each vacuum pump module, the inlet branch pipe is connected to the filter inlet, the filter outlet is connected to the vacuum pump inlet, the filter outlet is also connected to the gas supply branch pipe, and the vacuum pump inlet is also connected to the gas supply branch pipe. The vacuum pump outlet is connected to the exhaust pipe. The source to be adsorbed is connected to the main intake pipe, and the main intake pipe is connected to each of the intake branch pipes; the main gas supply pipe is connected to each of the gas supply branch pipes.

2. The vacuum negative pressure device as described in claim 1, characterized in that, Each vacuum pump module includes an operating state and a non-operating state; the operating state of each vacuum pump module includes three operating modes: In operating mode one, the vacuum pump of the vacuum pump module is working, and the filter of the vacuum pump module is working and filtering the gas entering the vacuum pump of the vacuum pump module. In operating mode two, the vacuum pump of the vacuum pump module is working, and the filter of the vacuum pump module is not working; the gas entering the vacuum pump of the vacuum pump module comes from the filters of other vacuum pump modules in the vacuum negative pressure device. In operating mode three, the vacuum pump of the vacuum pump module is not working, but the filter of the vacuum pump module is working; the filter of the vacuum pump module filters the gas entering the vacuum pumps of other vacuum pump modules.

3. The vacuum negative pressure device as described in claim 2, characterized in that, The vacuum negative pressure device includes only a vacuum pump module in working mode one and a non-working vacuum pump module; or, the vacuum negative pressure device includes a vacuum pump module in at least two of the working modes of working mode one, working mode two, and working mode three.

4. The vacuum negative pressure device as described in claim 3, characterized in that, In working mode one and working mode three, the gas flow direction in the gas supply branch pipe of the vacuum pump module is from the end near the filter of the vacuum pump module to the end near the main gas supply pipe. In operating mode two, the gas flow direction in the gas supply branch pipe of the vacuum pump module is from one end near the main gas supply pipe to one end near the filter of the vacuum pump module.

5. The vacuum negative pressure device as described in claim 1, characterized in that, The filter inlet is provided with a first valve, the filter outlet is provided with a second valve, and the vacuum pump inlet is provided with a third valve; the first valve and the second valve are open when the filter is in working condition, and the first valve and the second valve are closed when the filter is not in working condition; the third valve is a normally open valve.

6. The vacuum negative pressure device as described in claim 1, characterized in that, It also includes a gas storage tank, and the gas transmission main is connected to the gas storage tank.

7. The vacuum negative pressure device as described in claim 6, characterized in that, It also includes at least two sub-control devices, each of which is electrically connected to a vacuum pump; and a master control device, which is electrically connected to all of the sub-control devices.

8. The vacuum negative pressure device as described in claim 7, characterized in that, It also includes at least one mounting bracket, which comprises at least two layers arranged vertically, with each layer corresponding to one of the vacuum pump modules.

9. The vacuum negative pressure device as described in claim 8, characterized in that, When the number of the at least two vacuum pump modules does not exceed three, the vacuum negative pressure device includes a mounting bracket; the main inlet pipe and the main outlet pipe are both fixedly connected to the mounting bracket.

10. The vacuum negative pressure device as described in claim 9, characterized in that, It also includes an independent vacuum pump; the number of vacuum pump modules is two; the mounting frame includes a three-layer frame, with each layer holding two vacuum pump modules and one independent vacuum pump; the air inlet of the independent vacuum pump is connected to the main air supply pipe through a branch pipe.

11. The vacuum negative pressure device as described in claim 8, characterized in that, When the number of the at least two vacuum pump modules exceeds three, the vacuum negative pressure device includes at least two mounting brackets.

12. The vacuum negative pressure device as described in claim 11, characterized in that, The intake manifold includes intake manifold one and intake manifold two, and the air supply manifold includes air supply manifold one and air supply manifold two; one intake manifold one and one air supply manifold one are fixed on each mounting bracket; the intake manifold two is connected to the intake manifold one on each mounting bracket, and the air supply manifold two is connected to the air supply manifold one on each mounting bracket.

13. The vacuum negative pressure device according to any one of claims 9-12, characterized in that, Both the sub-control device and the main control device are fixed to the side of the mounting frame; the number of sub-control devices on each mounting frame is equal to the number of vacuum pumps on the mounting frame.

14. The vacuum negative pressure device according to any one of claims 1-6, characterized in that, It also includes at least two bases, each of which is provided with one of the vacuum pump modules.

15. The vacuum negative pressure device as described in claim 14, characterized in that, It also includes at least two sub-control devices, each of which is electrically connected to a vacuum pump; and a central control device, which is electrically connected to all of the sub-control devices. Each of the bases is fixed with one of the sub-control devices; the main control device is set independently of the base.

16. The vacuum negative pressure device as described in claim 6, characterized in that, The at least two vacuum pump modules are fixed to the gas storage tank.

17. The vacuum negative pressure device as described in claim 16, characterized in that, Both the intake manifold and the delivery manifold are arranged along the axial direction of the gas storage tank.

18. The vacuum negative pressure device as described in claim 16 or 17, characterized in that, It also includes at least one independent vacuum pump, which is fixed on the gas storage tank. The inlet of the independent vacuum pump is connected to the main gas supply pipe through a gas supply branch pipe. The filters of the at least two vacuum pump modules filter the gas entering the independent vacuum pump.

Images