Fluid delivery device implementing series-parallel delivery switching

Abstract

The utility model belongs to the technical field of fluid conveying equipment, specifically relates to the fluid conveying equipment of realizing series -parallel connection conveying switch, the utility model discloses the following technical scheme is adopted to the low flexibility of the existing fluid conveying equipment of adopting multi -chamber series connection, the application is restricted insufficient: the fluid conveying equipment of realizing series -parallel connection conveying switch includes: fuselage, has fluid total import, fluid total export, multiple working chambers and fluid passage, is equipped with conveying assembly in working chamber, and the fluid passage includes access channel, discharge channel and the intermediate channel between working chamber, power mechanism, drive conveying assembly action and produce fluid conveying power, switching device, including the multiple valve of distribution in access channel, intermediate channel and discharge channel, switching device on -off access channel, intermediate channel and discharge channel, realize the switch of series -parallel connection conveying, the utility model has the advantages of can switch between series -parallel connection, satisfies different demand.

Description

Technical Field

[0001] This utility model belongs to the technical field of fluid conveying equipment, specifically relating to fluid conveying equipment that enables series-parallel conveying switching. Background Technology

[0002] Multistage pressure pumps are commonly used in fluid transport equipment. They are classified as booster pumps, negative pressure pumps, and vacuum pumps, and each has multiple chambers connected in series. Roots vanes, claw vanes, or helical vanes in each chamber are driven by a motor. The series structure of a multistage pressure pump accumulates the pressure differences between the multiple rotors, creating a larger pressure difference between the inlet and outlet, thus achieving the target pressure value. However, when the initial inlet and outlet pressure difference is low, the effective pumping speed is low. Furthermore, in some applications, a large pressure difference is not required. Therefore, the application of multistage pressure pumps is limited.

[0003] Similarly, other fluid transport equipment that uses multiple chambers connected in series also has similar problems. Summary of the Invention

[0004] This invention addresses the shortcomings of existing fluid conveying equipment with multiple chambers connected in series, which suffer from low flexibility and limited application. It provides a fluid conveying equipment that enables switching between series and parallel conveying. By switching the conveying channels between series and parallel, it achieves switching between large flow rates or large head / large differential pressure, adapting to different scenarios and / or different working stages in the same scenario, thus expanding the scope of application.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a fluid conveying device for switching between series and parallel conveying, wherein the fluid conveying device for switching between series and parallel conveying includes:

[0006] The fuselage has a total fluid inlet, a total fluid outlet, multiple working chambers and fluid channels. The working chambers are equipped with conveying components. The fluid channels include an inlet channel between the total fluid inlet and each working chamber, an outlet channel between the total fluid outlet and each working chamber, and an intermediate channel between the working chambers.

[0007] The power mechanism drives the conveying components and generates fluid conveying power.

[0008] The switching device includes multiple valves distributed in the inlet channel, intermediate channel and outlet channel;

[0009] The switching device switches the inlet channel, intermediate channel, and outlet channel to achieve the switching between series and parallel conveying.

[0010] This utility model discloses a fluid conveying device for switching between series and parallel conveying. Its body has a total fluid inlet, a total fluid outlet, multiple working chambers, and fluid channels. The fluid channels include an inlet channel, an outlet channel, and an intermediate channel. A switching device switches the inlet channel, the intermediate channel, and the outlet channel to achieve the switching between series and parallel conveying. Series connection can achieve large head or large pressure difference, while parallel connection can achieve large flow rate. Thus, it is possible to switch between series and parallel connections to meet different needs.

[0011] As an improvement, the fuselage has two working chambers, and a switching device switches on and off the inlet channel, intermediate channel and outlet channel to realize the switching between series and parallel connection of the two working chambers. Alternatively, the fuselage has at least three working chambers, and a switching device switches on and off the inlet channel, intermediate channel and outlet channel to realize the switching between full series, full parallel and series-parallel hybrid connection.

[0012] As an improvement, the fluid delivery equipment is a vacuum pump, and there is a pressure difference between the total fluid inlet and the total fluid outlet; the number of working chambers in the machine body is 5-8.

[0013] As an improvement, the fluid transport equipment is a rotary variable displacement vacuum pump, the transport components include a pump rotor, and the power mechanism includes a motor; the pump rotor type includes one or more of screw, Roots, claw, vane, and diaphragm types.

[0014] As an improvement, the valve of the switching device can be a manual valve or an automatic valve.

[0015] As an improvement, the valve of the switching device is an automatic valve, and a sensor is provided on the fluid channel. The switching device also includes a controller connected to the sensor and controlling each automatic valve in a linkage manner. The sensor detects at least one of current, time, temperature, and vacuum degree.

[0016] As an improvement, only one of the intermediate channel and the discharge channel at the outlet of the same working chamber is connected at any given time.

[0017] As an improvement, all working chambers are axially distributed along the same axis.

[0018] As an improvement, the fuselage includes a body and side cover assemblies. The body forms various working chambers and an intermediate channel. The side cover assemblies are divided into an intake side cover assembly and an exhaust side cover assembly arranged opposite each other. The total fluid inlet is located on the intake side cover assembly, and the total fluid outlet is located on the exhaust side cover assembly. The intake side cover assembly forms an inlet channel, and the exhaust side cover assembly forms an outlet channel.

[0019] As an improvement, the valve for opening and closing the inlet channel is located on the intake side cover assembly, the valve for opening and closing the outlet channel is located on the exhaust side cover assembly, and the valve for opening and closing the intermediate channel is located on two surfaces adjacent to the intake side cover assembly and the exhaust side cover assembly, parallel to the axial direction.

[0020] As an improvement, the valve core of the valve that controls the opening and closing of the inlet channel is cylindrical; the valve core of the valve that controls the opening and closing of the outlet channel is cylindrical; and the valve core of the valve that controls the opening and closing of the middle channel is rectangular.

[0021] As an improvement, the main fluid inlet is located at the midpoint of the axial direction of the intake side cover assembly.

[0022] As an improvement, the fuselage includes the body and pipes. The body forms various working chambers, and the pipes are divided into an intake pipe, an intermediate channel and an exhaust pipe. The total fluid inlet is located on the intake pipe, and the total fluid outlet is located on the exhaust pipe. The intake pipe forms an inlet channel, the intermediate pipe forms an intermediate channel, and the exhaust pipe forms an outlet channel.

[0023] The beneficial effects of this utility model of fluid conveying equipment for switching between series and parallel conveying are as follows: the machine body has a total fluid inlet, a total fluid outlet, multiple working chambers and fluid channels, the fluid channels include an inlet channel, an outlet channel and an intermediate channel, and the switching device switches the inlet channel, the intermediate channel and the outlet channel to realize the switching between series and parallel conveying. Series connection can achieve large head or large pressure difference, and parallel connection can achieve large flow rate, so it can switch between series and parallel to meet different needs. Attached Figure Description

[0024] Figure 1 This is a structural block diagram of a fluid conveying device that realizes series-parallel conveying switching according to Embodiment 1 of this utility model.

[0025] Figure 2 This is a structural block diagram of a fluid conveying device for switching between series and parallel conveying according to Embodiment 2 of this utility model.

[0026] Figure 3 and Figure 4 These are schematic diagrams of the fluid conveying device for switching between series and parallel conveying according to Embodiment 3 of this utility model, taken from different angles.

[0027] Figure 5 and Figure 6 These are exploded views of the fluid conveying device for switching between series and parallel conveying according to Embodiment 3 of this utility model, taken from different angles.

[0028] Figure 7 and Figure 8 These are cross-sectional views from different angles of the fluid conveying device that realizes series-parallel conveying switching according to Embodiment 3 of this utility model.

[0029] Figure 9 and Figure 10 These are schematic diagrams of the body of the fluid conveying device for switching between series and parallel conveying according to Embodiment 3 of this utility model, taken from different angles.

[0030] Figure 11This is an exploded view of the air inlet cover assembly of the fluid conveying device for switching between series and parallel conveying according to Embodiment 3 of this utility model.

[0031] Figure 12 This is an exploded view of the exhaust side cover assembly of the fluid conveying device for switching between series and parallel conveying according to Embodiment 3 of this utility model.

[0032] Figure 13 This is a schematic diagram of the fluid flow path of the body of the fluid conveying device that realizes series-parallel conveying switching in Embodiment 3 of this utility model when it is in full series.

[0033] In the diagram, 1 is the main body; 11 is the working chamber; 12 is the intermediate passage; 121 is the air intake passage; 122 is the exhaust passage; and 123 is the intermediate through passage.

[0034] 2. Intake side cover assembly; 21. Intake port plate; 211. Main air intake hole; 22. Intake channel plate; 221. Side air intake hole; 23. Inlet channel;

[0035] 3. Exhaust side cover assembly; 31. Exhaust port plate; 311. Main exhaust port; 32. Exhaust passage plate; 321. Side exhaust port; 33. Exhaust passage;

[0036] 4. Intake valve;

[0037] 5. Exhaust valve;

[0038] 6. Intermediate valve. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be explained and described below. However, the following embodiments are only preferred embodiments of the present invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present invention.

[0040] See Figures 1 to 13 The present invention provides a fluid conveying device for switching between series and parallel conveying, comprising:

[0041] The fuselage has a total fluid inlet, a total fluid outlet, multiple working chambers and fluid channels. The working chambers are equipped with conveying components. The fluid channels include an inlet channel between the total fluid inlet and each working chamber, an outlet channel between the total fluid outlet and each working chamber, and an intermediate channel between the working chambers.

[0042] The power mechanism drives the conveying components and generates fluid conveying power.

[0043] The switching device includes multiple valves distributed in the inlet channel, intermediate channel and outlet channel;

[0044] The switching device switches the inlet channel, intermediate channel, and outlet channel to achieve the switching between series and parallel conveying.

[0045] This utility model discloses a fluid conveying device for switching between series and parallel conveying. Its body has a total fluid inlet, a total fluid outlet, multiple working chambers, and fluid channels. The fluid channels include an inlet channel, an outlet channel, and an intermediate channel. A switching device switches the inlet channel, the intermediate channel, and the outlet channel to achieve the switching between series and parallel conveying. Series connection can achieve large head or large pressure difference, while parallel connection can achieve large flow rate. Thus, it is possible to switch between series and parallel connections to meet different needs.

[0046] Example 1

[0047] See Figure 1 The fluid conveying device for switching between series and parallel conveying according to Embodiment 1 of this utility model includes:

[0048] The machine body has a total fluid inlet, a total fluid outlet, multiple working chambers 11 and fluid channels. The working chambers 11 are equipped with conveying components. The fluid channels include an inlet channel 23 between the total fluid inlet and each working chamber 11, an outlet channel 33 between the total fluid outlet and each working chamber 11, and an intermediate channel 12 between the working chambers 11.

[0049] The power mechanism drives the conveying components and generates fluid conveying power.

[0050] The switching device includes multiple valves distributed on the inlet channel 23, the intermediate channel 12 and the outlet channel 33;

[0051] The switching device switches the inlet channel 23, the intermediate channel 12 and the outlet channel 33 to achieve the switching of series and parallel conveying.

[0052] In this embodiment, the machine body has two working chambers 11, and the switching device switches on and off the inlet channel 23, the intermediate channel 12 and the outlet channel 33 to realize the switching between the two working chambers 11 in series and in parallel.

[0053] In this embodiment, the switching device includes an intake valve 4, an exhaust valve 5, and an intermediate valve 6. The fluid inlet is connected to the inlet of the first-stage working chamber 11. The intake valve 4 is located between the fluid inlet and the inlet of the second-stage working chamber 11. The exhaust valve 5 is located between the outlet of the first-stage working chamber 11 and the fluid outlet. The intermediate valve 6 is located between the outlet of the first-stage working chamber 11 and the inlet of the second-stage working chamber 11. The intake valve 4 and the intermediate valve 6 are connected in parallel, and the intake valve 4 and the exhaust valve 5 are connected in parallel.

[0054] Example 2

[0055] See Figures 2 to 13 The fluid conveying device for switching between series and parallel conveying according to Embodiment 2 of this utility model includes:

[0056] The machine body has a total fluid inlet, a total fluid outlet, multiple working chambers 11 and fluid channels. The working chambers 11 are equipped with conveying components. The fluid channels include an inlet channel 23 between the total fluid inlet and each working chamber 11, an outlet channel 33 between the total fluid outlet and each working chamber 11, and an intermediate channel 12 between the working chambers 11.

[0057] The power mechanism drives the conveying components and generates fluid conveying power.

[0058] The switching device includes multiple valves distributed on the inlet channel 23, the intermediate channel 12 and the outlet channel 33;

[0059] The switching device switches the inlet channel 23, the intermediate channel 12 and the outlet channel 33 to achieve the switching of series and parallel conveying.

[0060] In this embodiment, the machine body has at least three working chambers 11, and the switching device switches on and off the inlet channel 23, the intermediate channel 12 and the outlet channel 33 to realize the switching between full series, full parallel and series-parallel hybrid.

[0061] In this embodiment, the switching device includes second to nth stage intake valves 4, first to n-1th stage exhaust valves 5, and first to n-1th intermediate valves 6. The total fluid inlet is connected to the inlet of the first stage working chamber 11. The first stage exhaust valve 5 is located between the outlet of the first stage working chamber 11 and the total fluid outlet. The first intermediate valve 6 is located between the outlet of the first stage working chamber 11 and the inlet of the second stage working chamber 11. The second stage intake valve 4 and the first intermediate valve 6 are connected in parallel. All intake valves 4 are connected in series, and all exhaust valves 5 are connected in parallel.

[0062] In this embodiment, when a large flow rate is required, the second to nth stage intake valves 4 are all opened, the first to n-1th intermediate valves 6 are all closed, and the first to n-1th stage exhaust valves 5 are all opened, thereby realizing the parallel connection of n working chambers 11.

[0063] In this embodiment, when a large head / high pressure difference is required, the second to nth stage exhaust valves 5 are all closed, the first to n-1th stage exhaust valves 5 are all closed, and the first to n-1th stage intermediate valves 6 are all opened, thereby realizing the series connection of n working chambers 11.

[0064] In this embodiment, when both high flow rate and high head / pressure differential are required, the second-stage intake valve 4 can be opened, the first intermediate valve 6 closed, the first-stage exhaust valve 5 and the second-stage exhaust valve 5 opened, the third to nth stage exhaust valves 5 closed, and the third to n-1th stage exhaust valves 5 closed. This achieves parallel connection of the first-stage working chamber 11 and the second-stage working chamber 11, followed by series connection of the third to nth stage working chambers 11. In other embodiments, other combinations of series and parallel connections can also be used, such as first connecting in series and then in parallel.

[0065] Example 3

[0066] See Figures 3 to 13 The fluid conveying device for switching between series and parallel conveying according to Embodiment 2 of this utility model includes:

[0067] The machine body has a total fluid inlet, a total fluid outlet, multiple working chambers 11 and fluid channels. The working chambers 11 are equipped with conveying components. The fluid channels include an inlet channel 23 between the total fluid inlet and each working chamber 11, an outlet channel 33 between the total fluid outlet and each working chamber 11, and an intermediate channel 12 between the working chambers 11.

[0068] The power mechanism drives the conveying components and generates fluid conveying power.

[0069] The switching device includes multiple valves distributed on the inlet channel 23, the intermediate channel 12 and the outlet channel 33;

[0070] The switching device switches the inlet channel 23, the intermediate channel 12 and the outlet channel 33 to achieve the switching of series and parallel conveying.

[0071] In this embodiment, the fluid transport device is a vacuum pump, and there is a pressure difference between the total fluid inlet and the total fluid outlet.

[0072] In this embodiment, the fluid transport device is a rotary variable displacement vacuum pump, the transport component includes a pump rotor, and the power mechanism includes a motor; the pump rotor type includes one or more of screw, Roots, claw, vane, and diaphragm types.

[0073] In this embodiment, the fluid delivery device is a multi-stage vacuum pump (or can be considered as a multi-stage vacuum pump), and the number of working chambers 11 in the machine body is 5-8. Specifically, the machine body has 6 working chambers 11.

[0074] In this embodiment, the valve of the switching device is an automatic valve, and a sensor is provided on the fluid channel. The switching device also includes a controller connected to the sensor and controlling each automatic valve in conjunction with it. The sensor detects at least one of current, time, temperature, and vacuum level to achieve automatic control. In other embodiments, the valve of the switching device can also be a manual valve.

[0075] In this embodiment, only one of the intermediate channel 12 and the discharge channel 33 at the outlet of the same working chamber 11 is connected at any given time.

[0076] In this embodiment, all working chambers 11 are axially distributed along the same axis.

[0077] In this embodiment, the body includes a body 1 and a side cover assembly. The body 1 forms various working chambers 11 and a middle channel 12. The side cover assembly is divided into an intake side cover assembly 2 and an exhaust side cover assembly 3 arranged opposite to each other. The total fluid inlet is provided on the intake side cover assembly 2, and the total fluid outlet is provided on the exhaust side cover assembly 3. The intake side cover assembly 2 forms an inlet channel 23, and the exhaust side cover assembly 3 forms an outlet channel 33.

[0078] In this embodiment, the intermediate channel 12 includes multiple air intake channel 121 on the air intake surface of the body 1, multiple exhaust channel 122 on the exhaust surface, and multiple intermediate through channels 123 between the air intake and exhaust surfaces of the body 1. Intermediate valves open and close the intermediate through channels 123. Specifically, when there are six working chambers 11, there are five intermediate through channels 123 and five intermediate valves, located on two opposite surfaces, with two on one surface and three on the other. There are five air intake channel 121 and five exhaust channel 122. The air intake valve opens and closes the side air intake hole 221 of the air intake side cover assembly 2 connecting to the air intake channel 121, and the exhaust valve opens and closes the side exhaust hole 321 of the exhaust side cover assembly 3 connecting to the exhaust channel 122.

[0079] In this embodiment, the body 1 is composed of two parts, upper and lower.

[0080] In this embodiment, the body 1 is generally rectangular and has six sides.

[0081] In this embodiment, the valve for opening and closing the inlet channel 23 is located on the intake side cover assembly 2, the valve for opening and closing the outlet channel 33 is located on the exhaust side cover assembly 3, and the valve for opening and closing the intermediate channel 12 is located on two surfaces parallel to the axial direction adjacent to the intake side cover assembly 2 and the exhaust side cover assembly 3. End covers (not shown in the figure) are provided on two surfaces at both ends of the body 1 along the axial direction, and the end covers form two working chambers 11 (first and sixth working chambers 11) at the ends.

[0082] In this embodiment, the valve core of the valve that switches on / off the inlet channel 23 is cylindrical; the valve core of the valve that switches on / off the outlet channel 33 is cylindrical; and the valve core of the valve that switches on / off the middle channel is rectangular.

[0083] In this embodiment, the main fluid inlet is located at the middle position along the axial direction of the intake side cover assembly 2. Specifically, the body 1 has first to sixth working chambers 11 along the axial direction, and the main fluid inlet is connected to the second working chamber 11. When the working chambers 11 are connected in series, the second working chamber 11 is the first-stage working chamber 11, the first working chamber 11 is the second-stage working chamber 11, and the third to sixth working chambers 11 are the third to sixth-stage working chambers 11. Connecting the main fluid inlet to the second working chamber 11 instead of the first working chamber 11 results in better thermal balance of the body 1.

[0084] See Figure 11 In this embodiment, the air intake side cover assembly 2 includes an air intake plate 21 and an air intake channel plate 22. The air intake plate 21 has a main air intake hole 211, in which a main air inlet (not shown in the figure) is provided. The air intake channel plate 22 has comb-shaped grooves, with holes at the tips of the teeth of the comb-shaped grooves. A second hole in the axial direction connects the main air inlet and... Figure 13 The 2 in the middle.

[0085] See Figure 12 In this embodiment, the exhaust side cover assembly 3 includes an exhaust port plate 31 and an exhaust channel plate 32. The exhaust port plate 31 has a main exhaust hole 311, in which a main exhaust outlet (not shown in the figure) is provided. The exhaust channel plate 32 has a comb-shaped groove, with holes at the tips of the teeth of the comb-shaped groove. The length of the teeth at the exhaust end of the comb-shaped groove of the exhaust channel plate 32 is greater than that of the other teeth, and the tooth also has another hole (connecting the main exhaust hole 311 and the exhaust channel plate 32). Figure 13 (The 6th row in the middle).

[0086] See Figure 13 , Figure 13 The image above shows the air intake surface of fuselage 1. Figure 13The following figure shows the exhaust surface of the machine body 1. In this embodiment, the fluid movement direction in the fully tandem configuration is as follows: the fluid first passes sequentially through the main air inlet (total fluid inlet), the main air inlet hole 211 on the air inlet plate 21 of the air inlet side cover assembly 2, the comb-shaped groove of the air inlet channel plate 22, and the hole on the bottom wall of the comb-shaped groove of the air inlet channel plate 22 to reach the second air inlet of the machine body 1, then enters the second working chamber 11 (first-stage working chamber 11), and then flows out from the second row of the exhaust surface of the machine body 1, and then passes through the second row of the exhaust surface of the machine body 1. The air enters through two rows of intake channels on the intake side of the machine body 1 via the intake channel and the inter-exhaust channel. It then enters the first working chamber 11 (second-stage working chamber 11) via the exhaust channel on the machine body 1. After passing through one row of intake channels on the exhaust side of the machine body 1 and the inter-exhaust channel, it reaches one row of intake channels on the intake side of the machine body 1. It then enters the third working chamber 11 (third-stage working chamber 11) via the intake channel on the intake side of the machine body 1 via the exhaust channel. Finally, it passes through three rows of intake channels on the exhaust side of the machine body 1. The air intake of the machine body 1 is connected to the intake channel of the machine body 1 via a 3-row to 4-row inlet channel and an inlet-exhaust channel between the intake and exhaust surfaces. The air then enters the fourth working chamber 11 (fourth-stage working chamber 11) via the 4-row to 5-row inlet channel and an inlet-exhaust channel between the intake and exhaust surfaces. Finally, the air enters the fifth working chamber 11 (fifth-stage working chamber 11) via the intake channel of the machine body 1 via a 5-row to 4-row inlet channel and an inlet-exhaust channel between the intake and exhaust surfaces. The 5th row of the exhaust surface, the 5th row to 6th row inlet channel, and the inlet-exhaust surface inter-channel reach the 5th row to 6th row inlet channel of the intake surface of the body 1, and enter the sixth working chamber 11 (sixth stage working chamber 11) from the 6th row of the intake surface of the body 1. Then, it enters the comb-shaped groove of the exhaust channel plate 32 from the 6th row of the exhaust surface of the body 1 and the non-tooth end hole of the comb-shaped groove of the exhaust channel plate 32, and flows out from the total exhaust hole 311 of the exhaust port plate 31 and the total exhaust port (total fluid outlet) in the total exhaust hole 311.

[0087] In this embodiment, when it is necessary to switch to parallel or series-parallel hybrid mode, it is only necessary to control each intake valve 4, exhaust valve 5 and intermediate valve 6.

[0088] The beneficial effects of the fluid conveying device for switching between series and parallel conveying in Embodiment 3 of this utility model are as follows: the machine body has a total fluid inlet, a total fluid outlet, at least three working chambers 11, and fluid channels. The fluid channels include an inlet channel 23, an outlet channel 33, and an intermediate channel 12. The switching device switches the inlet channel 23, the intermediate channel 12, and the outlet channel 33 to achieve the switching between series and parallel conveying. Series connection can achieve high head or high pressure difference, while parallel connection can achieve high flow rate. Thus, it can switch between three modes: full parallel connection, full series connection, and series-parallel hybrid connection to meet different needs. It can switch during working conditions to adapt to different stages of the same working process, such as first pumping air at a high flow rate when vacuuming, and then mixing series and parallel connection or full series connection when the vacuum level drops to a certain degree. When mixing series and parallel connection, it can be parallel connection first and then series connection, or series connection first and then parallel connection. The design of the inlet channel, exhaust channel, and intermediate channel 12 is reasonable. The layout of the inlet valve 4, exhaust valve 5, and intermediate valve 6 is reasonable.

[0089] In other embodiments, the fuselage includes a body 1 and pipes. Each working chamber 11 is formed on the body 1. The pipes are divided into an air intake pipe, an intermediate channel 12 and an exhaust pipe. The total fluid inlet is located on the air intake pipe and the total fluid outlet is located on the exhaust pipe. The air intake pipe forms an inlet channel 23, the intermediate pipe forms an intermediate channel 12, and the exhaust pipe forms an outlet channel 33.

[0090] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes, but is not limited to, the content described in the above specific embodiments. Any modifications that do not depart from the functional and structural principles of the present invention will be included within the scope of the claims.

Claims

1. Fluid delivery apparatus enabling a series-parallel delivery switch-over, characterised in that: The fluid transport equipment that enables series-parallel transport switching includes: The body has a total fluid inlet, a total fluid outlet, multiple working chambers (11) and fluid channels. The working chambers (11) are equipped with conveying components. The fluid channels include an inlet channel (23) between the total fluid inlet and each working chamber (11), an outlet channel (33) between the total fluid outlet and each working chamber (11), and an intermediate channel (12) between the working chambers (11). The power mechanism drives the conveying components and generates fluid conveying power. The switching device includes multiple valves distributed on the inlet channel (23), the intermediate channel (12) and the outlet channel (33); The switching device switches the inlet channel (23), the intermediate channel (12) and the outlet channel (33) to achieve the switching of series and parallel conveying.

2. The fluid delivery device implementing series-parallel delivery switching of claim 1, wherein: The machine body has two working chambers (11), and the switching device switches on and off the inlet channel (23), the intermediate channel (12) and the outlet channel (33) to realize the switching between the two working chambers (11) in series and in parallel. Alternatively, the machine body has at least three working chambers (11), and the switching device switches on and off the inlet channel (23), the intermediate channel (12) and the outlet channel (33) to realize the switching between full series, full parallel and series-parallel hybrid.

3. The fluid delivery device to implement series-parallel delivery switching according to claim 1, characterized in that: The fluid transport equipment is a vacuum pump, and there is a pressure difference between the total fluid inlet and the total fluid outlet; the number of working chambers (11) in the machine body is 5-8.

4. The fluid delivery device implementing series-parallel delivery switching of claim 3, wherein: The fluid transport equipment is a rotary variable displacement vacuum pump, the transport components include a pump rotor, and the power mechanism includes a motor; the pump rotor type includes one or more of screw, Roots, claw, vane, and diaphragm types.

5. The fluid delivery apparatus of claim 1, wherein: The valve of the switching device can be a manual valve or an automatic valve.

6. The fluid conveying device for switching between series and parallel conveying according to claim 1, characterized in that: The valves of the switching device are automatic valves, and sensors are installed on the fluid passages. The switching device also includes a controller connected to the sensors and controlling each automatic valve in a coordinated manner. The sensors detect at least one of current, time, temperature, and vacuum.

7. Fluid delivery apparatus for effecting a switch between series and parallel delivery according to any one of claims 1 to 6, characterised in that: At the same working chamber (11), only one of the intermediate channel (12) and the discharge channel (33) at the chamber outlet can be connected at any given time.

8. The fluid delivery device implementing series-parallel delivery switching of claim 7, wherein: All working chambers (11) are axially distributed along the same axis.

9. The fluid delivery device implementing series-parallel delivery switching of claim 8, wherein: The fuselage includes a body (1) and a side cover assembly. The body (1) forms various working chambers (11) and a middle channel (12). The side cover assembly is divided into an intake side cover assembly (2) and an exhaust side cover assembly (3) arranged opposite to each other. The total fluid inlet is located on the intake side cover assembly (2), and the total fluid outlet is located on the exhaust side cover assembly (3). The intake side cover assembly (2) forms an inlet channel (23), and the exhaust side cover assembly (3) forms an outlet channel (33).

10. The fluid delivery device implementing series-parallel delivery switching of claim 9, wherein: The valve for opening and closing the inlet channel (23) is located on the intake side cover assembly (2), the valve for opening and closing the outlet channel (33) is located on the exhaust side cover assembly (3), and the valve for opening and closing the intermediate channel (12) is located on two surfaces parallel to the axial direction adjacent to the intake side cover assembly (2) and the exhaust side cover assembly (3).

11. The fluid conveying device for switching between series and parallel conveying according to claim 10, characterized in that: The valve core of the valve that controls the flow into channel (23) is cylindrical; the valve core of the valve that controls the flow out channel (33) is cylindrical; and the valve core of the valve that controls the flow in the middle channel is rectangular.

12. The fluid delivery device implementing series-parallel delivery switching of claim 9, wherein: The intermediate channel (12) includes multiple air intake channel (121) on the air intake surface of the body (1) and multiple exhaust channel (122) on the exhaust surface, as well as multiple intermediate through channels (123) between the air intake surface and the exhaust surface of the body (1), and the intermediate valve switches the intermediate through channels (123).

13. The fluid delivery device implementing series-parallel delivery switching of claim 9, wherein: The fluid inlet is located at the midpoint of the air intake side cover assembly (2) along the axial direction.

14. The fluid delivery device implementing series-parallel delivery switching of claim 8, wherein: The fuselage includes the body (1) and pipes. The body (1) forms various working chambers (11). The pipes are divided into an air intake pipe, an intermediate channel (12) and an exhaust pipe. The total fluid inlet is located on the air intake pipe, and the total fluid outlet is located on the exhaust pipe. The air intake pipe forms an inlet channel (23), the intermediate pipe forms an intermediate channel (12), and the exhaust pipe forms an outlet channel (33).

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