Variable-frequency air compression device

Abstract

The utility model discloses a variable-frequency air compression device, and relates to the field of compressors. The variable-frequency air compression device comprises a base, a variable-frequency motor, a crankcase and a distributed air cooler, the variable-frequency motor, the crankcase and the distributed air cooler are all arranged on the base, a plurality of compression air cylinders are arranged on the crankcase, the variable-frequency motor is in transmission connection with the compression air cylinders, and the distributed air cooler is provided with a plurality of heat dissipation units. The multiple compression air cylinders and the multiple heat dissipation units are sequentially and alternately connected through pipelines. According to the variable-frequency air compression device, variable-frequency output can be carried out while a stable heat dissipation effect is achieved, different output requirements are met, and energy waste is avoided.

Description

Technical Field

[0001] The utility model relates to the field of compressors, and in particular to a variable frequency air compression device. Background Art

[0002] At present, in the air compression device on the market, the rotating shaft of the main motor is connected to the heat dissipation device through the crankshaft assembly of the crankcase, that is, the main motor serves as the power source of the crankshaft assembly and the heat dissipation device at the same time.

[0003] In actual applications of such air compression devices, in order to ensure the stable heat dissipation effect of the heat dissipation device, the main motor is usually a fixed-frequency motor with a constant speed. The fixed-frequency output is difficult to meet different output requirements and is very likely to cause energy waste. Utility Model Content

[0004] The utility model aims to provide a variable frequency air compression device, which can perform variable frequency output while ensuring good and stable heat dissipation effect, meet different output requirements, and avoid energy waste.

[0005] The embodiment of the utility model provides a technical solution:

[0006] A variable frequency air compression device comprises a base, a variable frequency motor, a crankcase and a distributed air cooler, wherein the variable frequency motor, the crankcase and the distributed air cooler are all arranged on the base, a plurality of compression cylinders are arranged on the crankcase, the variable frequency motor is transmission-connected to the plurality of compression cylinders, the distributed air cooler has a plurality of heat dissipation units, and the plurality of compression cylinders and the plurality of heat dissipation units are alternately connected in sequence through pipelines.

[0007] In an optional embodiment, the decentralized air cooler further comprises a drive motor and a fan system, wherein the drive motor is connected to the fan system and is used to drive the fan system to operate so as to drive air flow for heat exchange with the plurality of heat dissipation units.

[0008] In an optional embodiment, the rotating shaft of the variable frequency motor is connected to the crankshaft assembly of the crankcase via a coupling, and the plurality of compression cylinders are transmission-connected to the crankshaft assembly; the variable frequency air compression device also includes a frequency converter, which is electrically connected to the variable frequency motor.

[0009] In an optional embodiment, the plurality of compression cylinders include a primary compression cylinder, a secondary compression cylinder, and a tertiary compression cylinder, and the plurality of heat dissipation units include a primary heat dissipation unit, a secondary heat dissipation unit, and a tertiary heat dissipation unit;

[0010] The output end of the first-stage compression cylinder is connected to the input end of the first-stage heat dissipation unit through a pipeline. The output end of the first-stage heat dissipation unit is connected to the input end of the second-stage compression cylinder through a pipeline. The output end of the second-stage compression cylinder is connected to the input end of the second-stage heat dissipation unit through a pipeline. The output end of the second-stage heat dissipation unit is connected to the input end of the third-stage compression cylinder through a pipeline. The output end of the third-stage compression cylinder is connected to the input end of the third-stage heat dissipation unit through a pipeline. The output end of the third-stage heat dissipation unit is used to output compressed gas.

[0011] In an alternative embodiment, the first-stage heat dissipation unit is provided with a first-stage safety valve for relieving pressure when the pressure of the first-stage heat dissipation unit exceeds a first safety threshold; and / or,

[0012] The second-stage heat dissipation unit is provided with a second-stage safety valve for relieving pressure when the pressure of the second-stage heat dissipation unit exceeds a second safety threshold; and / or,

[0013] The third-stage heat dissipation unit is provided with a third-stage safety valve for relieving pressure when the pressure of the third-stage heat dissipation unit exceeds a third safety threshold.

[0014] In an alternative embodiment, the variable-frequency air compressor device further includes a second-stage intake air separator disposed on the pipeline between the output end of the first-stage heat dissipation unit and the input end of the second-stage compression cylinder.

[0015] In an alternative embodiment, the variable-frequency air compressor device further includes a third-stage intake air separator disposed on the pipeline between the output end of the second-stage heat dissipation unit and the input end of the third-stage compression cylinder.

[0016] In an alternative embodiment, the variable-frequency air compressor device further includes a final-stage intake air separator disposed at the output end of the third-stage heat dissipation unit.

[0017] In an alternative embodiment, the variable-frequency air compressor device further includes a second-stage exhaust buffer tank disposed on the pipeline between the output end of the second-stage compression cylinder and the input end of the second-stage heat dissipation unit.

[0018] In an alternative embodiment, the variable-frequency air compressor device further includes a third-stage exhaust buffer tank disposed on the pipeline between the output end of the third-stage compression cylinder and the input end of the third-stage heat dissipation unit.

[0019] Compared with the prior art, the variable-frequency air compression device provided by the present utility model uses a decentralized air cooler that operates independently to dissipate heat from the compressed air. The variable-frequency motor only serves as the power source for the crankcase, can achieve variable-speed output, meet different output requirements, and avoid waste of energy consumption. The heat dissipation effect of the decentralized air cooler is not affected by the variable-frequency motor and can maintain stable and high efficiency. Therefore, the beneficial effects of the variable-frequency air compression device provided by the present utility model include: being able to perform variable-frequency output while obtaining a stable heat dissipation effect, meeting different output requirements, and avoiding waste of energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 Structural schematic diagram of the variable-frequency air compression device provided for the embodiments of the present utility model;

[0022] Figure 2 Structural schematic diagram of the decentralized air cooler;

[0023] Figure 3 Structural schematic diagram of the connecting pipeline between the primary heat dissipation unit and the secondary compression cylinder;

[0024] Figure 4 Structural schematic diagram of the connecting pipeline between the secondary compression cylinder and the secondary heat dissipation unit;

[0025] Figure 5 Structural schematic diagram of the connecting pipeline between the tertiary compression cylinder and the tertiary heat dissipation unit;

[0026] Figure 6 Structural schematic diagram of the connecting pipeline between the tertiary heat dissipation unit and the final-stage intake separator.

[0027] Icons: 100 - Variable - frequency air compression device; 110 - Base; 120 - Variable - frequency motor; 130 - Crankcase; 131 - First - stage compression cylinder; 132 - Second - stage compression cylinder; 133 - Third - stage compression cylinder; 140 - Decentralized air cooler; 141 - First - stage safety valve; 142 - Second - stage safety valve; 143 - Third - stage safety valve; 144 - First interface; 145 - Second interface; 146 - Third interface; 147 - Fourth interface; 148 - Fifth interface; 149 - Sixth interface; 150 - Coupling; 161 - Second - stage intake separator; 162 - Third - stage intake separator; 163 - Final - stage intake separator; 171 - Second - stage exhaust buffer tank; 172 - Third - stage exhaust buffer tank. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. The components of the embodiments of the present utility model described and illustrated herein usually can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0030] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0031] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships in which the utility model product is usually placed during use, or the orientation or positional relationships commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0032] In addition, the terms "first", "second", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0033] In the description of the present utility model, it should also be noted that, unless otherwise clearly specified and defined, terms such as "arrangement" and "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] The following will describe in detail the specific embodiments of the present utility model with reference to the accompanying drawings.

[0035] Embodiment

[0036] Please refer to Figure 1 , Figure 1 which shows a schematic structural diagram of the variable-frequency air compression device 100 provided in this embodiment.

[0037] The variable-frequency air compression device 100 provided in this embodiment includes a base 110, a variable-frequency motor 120, a crankcase 130, and a decentralized air cooler 140. The variable-frequency motor 120, the crankcase 130, and the decentralized air cooler 140 are all arranged on the base 110. A plurality of compression cylinders are arranged on the crankcase 130. The variable-frequency motor 120 is drivingly connected to the plurality of compression cylinders. The decentralized air cooler 140 has a plurality of heat dissipation units. The plurality of compression cylinders and the plurality of heat dissipation units are alternately connected in sequence through pipelines.

[0038] The variable-frequency air compression device 100 further includes an inverter, which is electrically connected to the variable-frequency motor 120. The variable-frequency motor 120 is controlled by the inverter and its rotation speed is adjustable. The decentralized air cooler 140 further has a driving motor (not shown in the figure) and a fan system (not shown in the figure). The driving motor is connected to the fan system and is used to drive the fan system to operate so as to drive the air flow to exchange heat with the plurality of heat dissipation units.

[0039] In practical applications, the driving motor can be a fixed-frequency motor, which drives the fan system to operate, agitates the air flow to pass through the plurality of heat dissipation units, exchanges heat with the plurality of heat dissipation units, and realizes the heat dissipation and temperature reduction of the compressed air flowing through each heat dissipation unit. It can be seen that even if the rotation speed of the variable-frequency motor 120 changes in order to meet different output requirements and save energy consumption, the operating state of the driving motor of the decentralized air cooler 140 will not change, and the heat dissipation effect can be ensured to be stable.

[0040] In this embodiment, the rotating shaft of the variable-frequency motor 120 is connected to the crankshaft assembly of the crankcase 130 through a coupling 150, and a plurality of compression cylinders are drivingly connected to the crankshaft assembly. In practical applications, the rotation of the rotating shaft of the variable-frequency motor 120 drives the rotation of the crankshaft assembly of the crankcase 130, thereby driving the operation of a plurality of compression cylinders connected to the crankshaft assembly, compressing air in multiple stages and then outputting it to the outside. Every time the air passes through one stage of compression, it flows into a corresponding heat dissipation unit for heat dissipation, and then proceeds to the next stage of compression after the heat dissipation is completed.

[0041] Please refer to Figure 2 , Figure 2 which shows a schematic structural diagram of the decentralized air cooler 140.

[0042] In this embodiment, a first interface 144, a second interface 145, a third interface 146, a fourth interface 147, a fifth interface 148, and a sixth interface 149 are provided on the housing of the decentralized air cooler 140. A plurality of heat dissipation units of the decentralized air cooler 140 are arranged inside the housing, specifically including a primary heat dissipation unit, a secondary heat dissipation unit, and a tertiary heat dissipation unit. The first interface 144 is the input interface of the primary heat dissipation unit, and the second interface 145 is the output interface of the first heat dissipation unit; the third interface 146 is the input interface of the secondary heat dissipation unit, and the fourth interface 147 is the output interface of the secondary heat dissipation unit; the fifth interface 148 is the input interface of the tertiary heat dissipation unit, and the sixth interface 149 is the output interface of the tertiary heat dissipation unit.

[0043] It can be understood that each heat dissipation unit can be a pipeline for the flow of compressed air, and the pipe wall of the pipeline has good heat conduction function. When the air is blown through each heat dissipation unit by the fan system, heat exchange occurs between the pipe wall passing through each heat dissipation unit and the compressed air, thereby taking away the heat of the compressed air flowing through each heat dissipation unit and realizing the heat dissipation of the compressed air.

[0044] In this embodiment, for safety reasons, a primary safety valve 141 is provided in the primary heat dissipation unit, which is used to open and relieve pressure when the pressure in the primary heat dissipation unit exceeds the first safety threshold, and discharge part of the compressed air in the primary heat dissipation unit; a secondary safety valve 142 is provided in the secondary heat dissipation unit, which is used to open and relieve pressure when the pressure in the secondary heat dissipation unit exceeds the second safety threshold, and discharge part of the compressed air in the secondary heat dissipation unit; a tertiary safety valve 143 is provided in the tertiary heat dissipation unit, which is used to open and relieve pressure when the pressure in the tertiary heat dissipation unit exceeds the third safety threshold, and discharge part of the compressed air in the tertiary heat dissipation unit.

[0045] Actually, the plurality of compression cylinders provided on the crankcase 130 include a primary compression cylinder 131, a secondary compression cylinder 132, and a tertiary compression cylinder 133. Figure 1The connecting pipeline between the first-stage compression cylinder 131 and the first-stage heat dissipation unit is shown. The output end of the first-stage compression cylinder 131 is connected to the first interface 144 through a pipeline. The input end of the first-stage compression cylinder 131 sucks in the air in the environment. After compression, the compressed air with a certain pressure is input into the first-stage heat dissipation unit through its output end for heat dissipation.

[0046] Please refer to Figure 3 , Figure 3 The structural schematic diagram of the connecting pipeline between the first-stage heat dissipation unit and the second-stage compression cylinder 132 is shown.

[0047] The second interface 145 is connected to the input end of the second-stage compression cylinder 132 through a pipeline, realizing the connection between the output end of the first-stage heat dissipation unit and the second-stage compression cylinder 132. In fact, the variable-frequency air compression device 100 further includes a second-stage air inlet separator 161, and the second-stage air inlet separator 161 is arranged on the pipeline between the output end of the first-stage heat dissipation unit and the input end of the second-stage compression cylinder 132.

[0048] In actual application, the compressed air that has been heat-dissipated and discharged from the first-stage heat dissipation unit first passes through the second-stage air inlet separator 161. The second-stage air inlet separator 161 removes impurities such as particles and moisture in the compressed air, ensuring the purity of the compressed gas entering the second-stage compression cylinder 132 and improving the compression efficiency.

[0049] Please refer to Figure 4 , Figure 4 The structural schematic diagram of the connecting pipeline between the second-stage compression cylinder 132 and the second-stage heat dissipation unit is shown.

[0050] The output end of the second-stage compression cylinder 132 is connected to the third interface 146 through a pipeline, realizing the connection with the input end of the second-stage heat dissipation unit. In fact, the variable-frequency air compression device 100 further includes a second-stage exhaust buffer tank 171, and the second-stage exhaust buffer tank 171 is arranged on the pipeline between the output end of the second-stage compression cylinder 132 and the input end of the second-stage heat dissipation unit.

[0051] In actual application, the compressed air that has been second-stage compressed and discharged from the second-stage compression cylinder 132 first passes through the second-stage exhaust buffer tank 171. The second-stage exhaust buffer tank 171 stabilizes the pressure of the compressed air, enabling the compressed air to flow into the third interface 146 in a stable state, that is, entering the second-stage heat dissipation unit.

[0052] In fact, Figure 4 The structure of the connecting pipeline between the second-stage heat dissipation unit and the third-stage compression cylinder 133 is also shown.

[0053] The fourth interface 147 is connected to the input end of the three-stage compression cylinder 133 through a pipeline, realizing the connection between the output end of the secondary heat dissipation unit and the input end of the three-stage compression cylinder 133. In fact, the variable-frequency air compression device 100 further includes a three-stage air inlet separator 162, and the three-stage air inlet separator 162 is arranged on the pipeline between the output end of the secondary heat dissipation unit and the input end of the three-stage compression cylinder 133.

[0054] In practical applications, the compressed air that has been cooled by the secondary heat dissipation unit first passes through the three-stage air inlet separator 162. The three-stage air inlet separator 162 removes impurities such as particles and moisture in the compressed air, ensuring that the compressed gas entering the three-stage compression cylinder 133 is pure and improving the compression efficiency.

[0055] Please refer to Figure 5 , Figure 5 which shows a schematic structural diagram of the pipeline connecting the three-stage compression cylinder 133 and the three-stage heat dissipation unit.

[0056] The output end of the three-stage compression cylinder 133 is connected to the fifth interface 148 through a pipeline, realizing the connection with the input end of the three-stage heat dissipation unit. Similarly, the variable-frequency air compression device 100 further includes a three-stage exhaust buffer tank 172, and the three-stage exhaust buffer tank 172 is arranged on the pipeline between the output end of the three-stage compression cylinder 133 and the input end of the three-stage heat dissipation unit.

[0057] The compressed air that has been compressed three times by the three-stage compression cylinder 133 first passes through the three-stage exhaust buffer tank 172. The three-stage exhaust buffer tank 172 stabilizes the pressure of the compressed air, enabling the compressed air to flow into the fifth interface 148 in a stable state, that is, entering the three-stage heat dissipation unit.

[0058] In fact, the variable-frequency air compression device 100 provided in this embodiment further includes a final-stage air inlet separator 163, and the final-stage air inlet separator 163 is arranged at the output end of the three-stage heat dissipation unit.

[0059] Please refer to Figure 6 , Figure 6 which shows a schematic structural diagram of the pipeline connecting the three-stage heat dissipation unit and the final-stage air inlet separator 163. The sixth interface 149 is connected to the final-stage separator through a pipeline, and the final-stage separator removes impurities in the flowing compressed air so that the compressed air is output to the outside in a pure state.

[0060] In summary, the variable-frequency air compression device 100 provided in this embodiment can perform variable-frequency output while obtaining a stable heat dissipation effect, meet different output requirements, and avoid energy consumption waste.

[0061] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A variable-frequency air compression device, characterized in that, It includes a base (110), a variable-frequency motor (120), a crankcase (130) and a decentralized air cooler (140). The variable-frequency motor (120), the crankcase (130) and the decentralized air cooler (140) are all arranged on the base (110). A plurality of compression cylinders are arranged on the crankcase (130). The variable-frequency motor (120) is drivingly connected to the plurality of compression cylinders. The decentralized air cooler (140) has a plurality of heat dissipation units, and the plurality of compression cylinders and the plurality of heat dissipation units are alternately connected in sequence through pipelines.

2. The variable-frequency air compression device according to claim 1, characterized in that The decentralized air cooler (140) further has a driving motor and a fan system. The driving motor is connected to the fan system and is used to drive the fan system to operate so as to drive air to flow and exchange heat with the plurality of heat dissipation units.

3. The variable-frequency air compression device according to claim 1, characterized in that, The rotating shaft of the variable-frequency motor (120) is connected to the crankshaft assembly of the crankcase (130) through a coupling (150), and the plurality of compression cylinders are drivingly connected to the crankshaft assembly; the variable-frequency air compression device (100) further includes a frequency converter, and the frequency converter is electrically connected to the variable-frequency motor (120).

4. The variable-frequency air compression device according to claim 1, characterized in that, The plurality of compression cylinders include a first-stage compression cylinder (131), a second-stage compression cylinder (132) and a third-stage compression cylinder (133), and the plurality of heat dissipation units include a first-stage heat dissipation unit, a second-stage heat dissipation unit and a third-stage heat dissipation unit; The output end of the first-stage compression cylinder (131) is connected to the input end of the first-stage heat dissipation unit through a pipeline. The output end of the first-stage heat dissipation unit is connected to the input end of the second-stage compression cylinder (132) through a pipeline. The output end of the second-stage compression cylinder (132) is connected to the input end of the second-stage heat dissipation unit through a pipeline. The output end of the second-stage heat dissipation unit is connected to the input end of the third-stage compression cylinder (133) through a pipeline. The output end of the third-stage compression cylinder (133) is connected to the input end of the third-stage heat dissipation unit through a pipeline. The output end of the third-stage heat dissipation unit is used to output compressed gas.

5. The variable-frequency air compression device according to claim 4, wherein The first-stage heat dissipation unit is provided with a first-stage safety valve (141) for opening and relieving pressure when the pressure of the first-stage heat dissipation unit exceeds the first safety threshold; and / or, The second-stage heat dissipation unit is provided with a second-stage safety valve (142) for opening and relieving pressure when the pressure of the second-stage heat dissipation unit exceeds the second safety threshold; and / or, The third-stage heat dissipation unit is provided with a third-stage safety valve (143) for opening and relieving pressure when the pressure of the third-stage heat dissipation unit exceeds the third safety threshold.

6. The variable-frequency air compression device according to claim 4, wherein, The variable-frequency air compression device (100) further includes a second-stage air inlet separator (161), and the second-stage air inlet separator (161) is arranged on the pipeline between the output end of the first-stage heat dissipation unit and the input end of the second-stage compression cylinder (132).

7. The variable-frequency air compression device according to claim 4, characterized in that, The variable-frequency air compression device (100) further includes a third-stage air inlet separator (162), and the third-stage air inlet separator (162) is arranged on the pipeline between the output end of the second-stage heat dissipation unit and the input end of the third-stage compression cylinder (133).

8. The variable-frequency air compression device according to claim 4, characterized in that, The variable-frequency air compression device (100) further includes a final-stage intake air separator (163), and the final-stage intake air separator (163) is disposed at the output end of the three-stage heat dissipation unit.

9. The variable-frequency air compression device according to claim 4, wherein, The variable-frequency air compression device (100) further includes a secondary exhaust buffer tank (171), and the secondary exhaust buffer tank (171) is disposed on the pipeline between the output end of the secondary compression cylinder (132) and the input end of the secondary heat dissipation unit.

10. The variable-frequency air compression device according to claim 4, characterized in that, The variable-frequency air compression device (100) further includes a tertiary exhaust buffer tank (172), and the tertiary exhaust buffer tank (172) is disposed on the pipeline between the output end of the tertiary compression cylinder (133) and the input end of the tertiary heat dissipation unit.

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