Combined air compressor

Abstract

The utility model belongs to the technical field of air compressors, and discloses a combined air compressor. The combined air compressor comprises a centrifugal unit, a screw unit, a first heat dissipation assembly and a cooler. The centrifugal unit is provided with an air inlet. An air inlet of the screw unit is communicated with an air outlet of the centrifugal unit; an air inlet of the first heat dissipation assembly communicates with an air outlet of the screw unit. A water inlet of the cooler is communicated with a water outlet of the first heat dissipation assembly, and a water outlet of the cooler is communicated with a water inlet of the first heat dissipation assembly. Inlet gas is firstly compressed by the centrifugal unit and then compressed by the screw unit, and gas with different flows can be compressed by adjusting working parameters of the centrifugal unit and the screw unit, so that the working range is widened. And for a large-flow occasion, the working efficiency can be further improved. In addition, in the compression process, compressed gas is cooled through joint cooperation of the first heat dissipation assembly and the cooler, and compression and process cooling are integrated while water circulation is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of air compressors, in particular to a combined air compressor. Background Art

[0002] An air compressor is a device that converts mechanical energy into gas pressure energy to continuously produce compressed air. It is widely used in machinery manufacturing, steel, metallurgy, shipbuilding, textiles, electronics, chemicals, petroleum, mining, light industry, food, medicine and other fields.

[0003] There are many types of air compressors, such as centrifugal and screw. Existing centrifugal air compressors are mainly used in large flow applications. In order to obtain high-pressure gas, multi-stage impellers are required for step-by-step compression, which has a complex structure. Existing screw air compressors are mainly used in small flow applications. Large screw compressors are expensive and have high energy consumption. In short, existing air compressors have problems such as narrow working range or low working efficiency, and cannot meet the application requirements of many working conditions.

[0004] Therefore, a combined air compressor is urgently needed to solve the above-mentioned technical problems. Utility Model Content

[0005] The utility model aims to provide a combined air compressor with a wide working range, which can adapt to the application requirements of many working conditions, has high working efficiency, can realize water circulation, and realize the integration of compression and process cooling.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A combined air compressor, comprising:

[0008] A centrifugal unit, wherein the centrifugal unit is provided with an air inlet;

[0009] A screw unit, wherein the air inlet of the screw unit is connected to the air outlet of the centrifugal unit;

[0010] A first heat dissipation component is used to reduce the temperature of gas and water; the air inlet of the first heat dissipation component is connected to the air outlet of the screw unit, and the air outlet of the first heat dissipation component is used to output compressed gas;

[0011] A cooler is arranged in the gas path formed by the centrifugal unit, the screw unit and the first heat dissipation component; the cooler is used to cool the gas through water, the water inlet of the cooler is connected to the water outlet of the first heat dissipation component, and the water outlet of the cooler is connected to the water inlet of the first heat dissipation component.

[0012] Preferably, the centrifugal unit includes a first motor, a first head and a second head, the first head and the second head are respectively arranged at two output ends of the first motor, the first head is provided with the air inlet, the air outlet of the first head is connected to the air inlet of the second head, and the air outlet of the second head is connected to the air inlet of the screw unit.

[0013] Preferably, the cooler is provided between the air outlet of the first-stage head and the air inlet of the second-stage head.

[0014] Preferably, the combined air compressor includes a first water pipe and a second water pipe, the two ends of the first water pipe are respectively connected to the water inlet of the cooler and the water outlet of the first heat dissipation component, the two ends of the second water pipe are respectively connected to the water outlet of the cooler and the water inlet of the screw unit, and the water outlet of the screw unit is connected to the water inlet of the first heat dissipation component.

[0015] Preferably, the screw unit includes a compression component and a water vapor separation component, and the water vapor separation component is used to separate gas and liquid; the water vapor separation component is arranged on the compression component, the inlet of the water vapor separation component is connected with the air outlet and water outlet of the compression component, and the air inlet and water inlet of the first heat dissipation component are connected with the inner cavity of the water vapor separation component.

[0016] Preferably, the combined air compressor includes a first water pipe and a fourth water pipe, wherein both ends of the first water pipe are respectively connected to the water inlet of the cooler and the water outlet of the first heat dissipation component, and both ends of the fourth water pipe are respectively connected to the water outlet of the cooler and the water inlet of the first heat dissipation component.

[0017] Preferably, the cooler is provided between the air outlet of the centrifugal unit and the air inlet of the screw unit.

[0018] Preferably, the combined air compressor includes a fifth water pipe and a sixth water pipe, the water inlet of the cooler and the water outlet of the first heat dissipation component are connected through the fifth water pipe, and the water outlet of the cooler and the water inlet of the screw unit are connected through the sixth water pipe.

[0019] Preferably, the first heat dissipation component includes a radiator and a fan, and the fan is fixed on the radiator.

[0020] Preferably, the combined air compressor further comprises an air intake filter, which is arranged at the air inlet and is used for filtering gas.

[0021] Beneficial effects of the utility model:

[0022] The combined air compressor provided by the utility model comprises a centrifugal unit, a screw unit, a first heat dissipation component and a cooler. The introduced gas is first compressed by the centrifugal unit and then compressed by the screw unit. According to the actual compression requirements of the gas, the working parameters of the centrifugal unit and the screw unit can be adjusted to compress the gas of different flow sizes, so that the working range is widened. For large flow occasions, the advantages of large flow and high efficiency of the centrifugal unit are first utilized, and the gas volume flow after compression is reduced by the centrifugal unit, and then the gas enters the screw unit for recompression, which can improve the efficiency of compressing large flow gas. For small flow occasions, the speed of the centrifugal unit can be lowered, and the flow of the centrifugal unit is reduced and the pressure is reduced, and then the advantages of the small flow and high pressure ratio of the screw unit are utilized, and the compressed gas is recompressed by the screw unit to meet the working condition requirements of small flow. In addition, during the compression process, the cooler cools the compressed gas by water, and the first heat dissipation component dissipates heat and cools the compressed gas discharged from the screw unit, thereby obtaining compressed gas. Since the water outlet of the cooler is connected with the water inlet of the first heat dissipation component, the first heat dissipation component dissipates heat for the water flowing out of the cooler. Since the water outlet of the first heat dissipation component is connected with the water inlet of the cooler, the water after heat dissipation enters the cooler to continue to cool the compressed gas, thus realizing water circulation, saving costs, making the combined air compressor easier to operate, and having higher working efficiency, and integrating compression and process cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the combined air compressor provided by the utility model.

[0024] In the figure:

[0025] 1. Centrifugal unit; 10. Air inlet; 11. First motor; 12. Primary machine head; 13. Secondary machine head; 2. Screw unit; 21. Compression assembly; 211. Second motor; 212. Screw machine head; 22. Water vapor separation element; 3. First heat dissipation assembly; 31. Radiator; 311. Exhaust port; 32. Fan; 4. First cooler; 5. First water pipe; 6. Second water pipe; 7. First gas pipeline; 8. Third water pipe; 9. Inlet filter; 100. Water. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0027] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0029] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0030] like Figure 1As shown, the utility model provides a combined air compressor, including a centrifugal unit 1, a screw unit 2, a first heat dissipation component 3 and a cooler, the centrifugal unit 1 is provided with an air inlet 10; the air inlet of the screw unit 2 is connected to the air outlet of the centrifugal unit 1; the first heat dissipation component 3 is used to reduce the temperature of the compressed gas and water 100; the air inlet of the first heat dissipation component 3 is connected to the air outlet of the screw unit 2, and the air outlet of the first heat dissipation component 3 is used to output compressed gas; the cooler is arranged in the gas path formed by the centrifugal unit 1, the screw unit 2 and the first heat dissipation component 3; the cooler is used to cool the gas through water 100, the water inlet of the cooler is connected to the water outlet of the first heat dissipation component 3, and the water outlet of the cooler is connected to the water inlet of the first heat dissipation component 3. The introduced gas is first compressed by the centrifugal unit 1, and then compressed by the screw unit 2. According to the actual compression demand for the gas, the working parameters of the centrifugal unit 1 and the screw unit 2 can be adjusted to compress gases of different flow sizes to widen the working range. For large flow rate occasions, the advantages of large flow rate and high efficiency of centrifugal unit 1 are first utilized to pre-compress the gas through centrifugal unit 1, and the volume flow rate of the compressed gas becomes smaller, and then it enters the screw unit 2 for recompression, which can improve the efficiency of compressing large flow rate gas. For small flow rate occasions, the speed of centrifugal unit 1 can be lowered, at which time the flow rate of centrifugal unit 1 becomes smaller and the pressure is reduced, and then the advantages of small flow rate and high pressure ratio of screw unit 2 are utilized to re-compress the compressed gas through screw unit 2 to meet the working conditions of small flow rate. In addition, during the compression process, the cooler cools the compressed gas through water 100, and the first heat dissipation component 3 dissipates heat and cools the compressed gas discharged from the screw unit 2 to obtain compressed gas. Since the water outlet of the cooler is connected with the water inlet of the first heat dissipation component 3, the first heat dissipation component 3 dissipates heat for the water 100 flowing out of the cooler. Since the water outlet of the first heat dissipation component 3 is connected with the water inlet of the cooler, the water 100 after dissipation enters the cooler to continue to cool the compressed gas, thereby realizing water circulation, saving costs, making the combined air compressor easier to operate, and having higher working efficiency, and integrating compression and process cooling.

[0031] In this process, the flow of water 100 is mainly driven by the pressure of the compressed gas.

[0032] Optionally, in this embodiment, the centrifugal unit 1 includes a first motor 11, a first-stage head 12 and a second-stage head 13, the first-stage head 12 and the second-stage head 13 are respectively arranged at two output ends of the first motor 11, the first-stage head 12 is provided with an air inlet 10, the air outlet of the first-stage head 12 is connected to the air inlet of the second-stage head 13, and the air outlet of the second-stage head 13 is connected to the air inlet of the screw unit 2. Specifically, the first-stage head 12 and the second-stage head 13 both include impellers. The first motor 11 is started to drive the impellers of the first-stage head 12 and the second-stage head 13 to rotate, the air enters the first-stage head 12 through the air inlet 10, the impeller of the first-stage head 12 rotates, the gas is compressed once, the compressed gas enters the air inlet of the second-stage head 13, the impeller of the second-stage head 13 rotates, the gas is compressed twice, and the compressed gas enters the screw unit 2 from the air inlet of the screw unit 2. The centrifugal unit 1 adopts a two-stage design. The air is compressed twice by the centrifugal unit 1, which further improves the compression efficiency. The gas is pre-compressed to 0.2-0.3MPaG, and the gas volume will be reduced to 1 / 3-1 / 4 of the original, which also makes the screw unit 2 smaller.

[0033] Furthermore, in this embodiment, a cooler is provided between the air outlet of the first-stage handpiece 12 and the air inlet of the second-stage handpiece 13, and the cooler is a first cooler 4. The first cooler 4 is provided to cool down the gas compressed by the first-stage handpiece 12, to prevent the temperature of the second-stage handpiece 13 from being too high when compressing the gas, and to prevent the second-stage handpiece 13 from overheating, and to reduce the compression work of the second-stage handpiece 13.

[0034] Optionally, in this embodiment, the combined air compressor includes a first water pipe 5 and a second water pipe 6, the two ends of the first water pipe 5 are respectively connected to the water inlet of the first cooler 4 and the water outlet of the first heat dissipation component 3, the two ends of the second water pipe 6 are respectively connected to the water outlet of the first cooler 4 and the water inlet of the screw unit 2, and the water outlet of the screw unit 2 is connected to the water inlet of the first heat dissipation component 3. After the water in the first cooler 4 cools the gas compressed by the primary head 12, it enters the screw unit 2 through the second water pipe 6 to lubricate the screw unit 2, and at the same time, it can cool the gas compressed by the secondary head 13. The water 100 after cooling enters the first heat dissipation component 3 from the water outlet of the screw unit 2 for heat dissipation and cooling. The cooled water 100 flows into the first cooler 4 again through the water outlet of the first heat dissipation component 3. Such an arrangement constitutes a water circuit to realize water circulation. The screw unit 2 is water-lubricated, and the compressed gas obtained is oil-free, which has a great advantage over the oil-injected screw unit.

[0035] Further optionally, in this embodiment, the combined air compressor also includes a second heat dissipation component for reducing the temperature of the gas and water 100; the air inlet of the second heat dissipation component is connected to the air outlet of the secondary head 13, the air outlet of the second heat dissipation component is connected to the air inlet of the screw unit 2, the water inlet of the second heat dissipation component is connected to the water outlet of the first cooler 4, and the water outlet of the second heat dissipation component is connected to the water inlet of the screw unit 2. The gas compressed by the secondary head 13 is dissipated by the second heat dissipation component to prevent the screw unit 2 from overheating due to excessive temperature when compressing the gas; the water 100 flowing out of the first cooler 4 is dissipated by the second heat dissipation component to achieve a better cooling effect of the water 100. Optionally, the structure of the second heat dissipation component is the same as that of the first heat dissipation component 3.

[0036] Optionally, in other embodiments, the combined air compressor includes a first water pipe 5 and a fourth water pipe, the two ends of the first water pipe 5 are respectively connected to the water inlet of the first cooler 4 and the water outlet of the first heat dissipation component 3, and the two ends of the fourth water pipe are respectively connected to the water outlet of the first cooler 4 and the water inlet of the first heat dissipation component 3. After the water 100 in the first cooler 4 cools down the gas compressed by the first-stage head 12, it enters the first heat dissipation component 3 through the fourth water pipe for heat dissipation and cooling. The cooled water 100 flows into the first cooler 4 again through the water outlet of the first heat dissipation component 3. Such an arrangement constitutes a water circuit to realize water circulation.

[0037] Optionally, a cooler is provided between the air outlet of the centrifugal unit 1 and the air inlet of the screw unit 2, and the cooler is a second cooler. The second cooler is provided to cool the gas compressed by the centrifugal unit 1 to prevent the screw unit 2 from overheating due to excessive temperature when compressing the gas.

[0038] Specifically, the combined air compressor includes a fifth water pipe and a sixth water pipe, the water inlet of the second cooler and the water outlet of the first heat dissipation component 3 are connected through the fifth water pipe, and the water outlet of the second cooler and the water inlet of the screw unit 2 are connected through the sixth water pipe. After the water 100 in the second cooler cools the gas compressed by the secondary head 13, it enters the screw unit 2 through the sixth water pipe to cool the screw unit 2. After the cooling, the water 100 enters the first heat dissipation component 3 from the water outlet of the screw unit 2 for heat dissipation and cooling. The cooled water 100 flows into the second cooler again through the fifth water pipe. Alternatively, the two ends of the sixth water pipe are respectively connected to the water outlet of the second cooler and the water inlet of the first heat dissipation component 3. After the water 100 in the second cooler cools the gas compressed by the secondary head 13, it directly enters the first heat dissipation component 3 for heat dissipation and cooling. The cooled water 100 flows into the second cooler again through the fifth water pipe.

[0039] Optionally, the screw unit 2 includes a compression assembly 21 and a water vapor separator 22, and the water vapor separator 22 is used to separate gas and liquid; the water vapor separator 22 is arranged on the compression assembly 21, and the inlet of the water vapor separator 22 is connected to the air outlet and water outlet of the compression assembly 21, and the air inlet and water inlet of the first heat dissipation assembly 3 are connected to the inner cavity of the water vapor separator 22. The water 100 discharged from the compression assembly 21 is separated from the gas by the water vapor separator 22. In addition, the water 100 enters the first heat dissipation assembly 3 from the water vapor separator 22, mainly relying on the high pressure provided by the compressed gas. Optionally, in this embodiment, the water vapor separator 22 is a barrel-shaped structure, which is simple to process. Optionally, the compression assembly 21 and the water vapor separator 22 are integrated or detachable.

[0040] Optionally, the combined air compressor includes a first gas pipeline 7, which is arranged through the water vapor separator 22, one end of the first gas pipeline 7 is connected to the air inlet of the first heat dissipation component 3, the other end of the first gas pipeline 7 is clamped in the water vapor separator 22, and the air inlet of the first gas pipeline 7 is arranged upward. The first gas pipeline 7 is arranged through the water vapor separator 22, which is convenient for installation and can prevent gas from overflowing from the connection port to the outside of the water vapor separator 22. The other end of the first gas pipeline 7 is clamped in the water vapor separator 22 to further fix it. Optionally, the combined air compressor also includes a third water pipe 8, which is arranged through the water vapor separator 22, one end of the third water pipe 8 is connected to the water inlet of the first heat dissipation component 3, and the other end of the third water pipe 8 is located in the water vapor separator 22. The third water pipe 8 is arranged through the water vapor separator 22, which is convenient for installation and can prevent water 100 from overflowing from the connection port to the outside of the water vapor separator 22.

[0041] Optionally, in this embodiment, the compression assembly 21 includes a second motor 211 and a screw head 212, and the screw head 212 is arranged at the output end of the second motor 211. The second motor 211 drives the screw head 212 to move, so as to recompress the gas.

[0042] Optionally, the first heat dissipation component 3 includes a radiator 31 and a fan 32, and the fan 32 is fixed on the radiator 31. The wind blown by the fan 32 enters the radiator 31 to cool the gas and water 100, and the compressed gas is discharged from the exhaust port 311 of the radiator 31. Optionally, the fan 32 is an axial flow fan, and the radiator 31 is a finned heat exchanger.

[0043] Optionally, the combined air compressor further comprises an air intake filter 9, which is arranged at the air inlet 10 and is used for filtering gas.

[0044] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A combined air compressor, characterized in that: include: A centrifugal unit (1), wherein the centrifugal unit (1) is provided with an air inlet (10); A screw unit (2), wherein an air inlet of the screw unit (2) is connected to an air outlet of the centrifugal unit (1); A first heat dissipation component (3) is used to reduce the temperature of the gas and the water (100); the air inlet of the first heat dissipation component (3) is connected to the air outlet of the screw unit (2), and the air outlet of the first heat dissipation component (3) is used to output compressed gas; A cooler is arranged in the gas path formed by the centrifugal unit (1), the screw unit (2) and the first heat dissipation component (3); the cooler is used to cool the gas through water (100), the water inlet of the cooler is connected to the water outlet of the first heat dissipation component (3), and the water outlet of the cooler is connected to the water inlet of the first heat dissipation component (3).

2. The combined air compressor according to claim 1, characterized in that: The centrifugal unit (1) comprises a first motor (11), a first-stage head (12) and a second-stage head (13); the first-stage head (12) and the second-stage head (13) are respectively arranged at two output ends of the first motor (11); the first-stage head (12) is provided with the air inlet (10); the air outlet of the first-stage head (12) is communicated with the air inlet of the second-stage head (13); and the air outlet of the second-stage head (13) is communicated with the air inlet of the screw unit (2).

3. The combined air compressor according to claim 2, characterized in that: The cooler is provided between the air outlet of the first-stage head (12) and the air inlet of the second-stage head (13).

4. The combined air compressor according to claim 3, characterized in that: The combined air compressor comprises a first water pipe (5) and a second water pipe (6), wherein the two ends of the first water pipe (5) are respectively connected to the water inlet of the cooler and the water outlet of the first heat dissipation component (3), and the two ends of the second water pipe (6) are respectively connected to the water outlet of the cooler and the water inlet of the screw unit (2), and the water outlet of the screw unit (2) is connected to the water inlet of the first heat dissipation component (3).

5. The combined air compressor according to claim 4, characterized in that: The screw unit (2) comprises a compression component (21) and a water vapor separation component (22), wherein the water vapor separation component (22) is used to separate gas and liquid; the water vapor separation component (22) is arranged on the compression component (21), the inlet of the water vapor separation component (22) is connected to the air outlet and the water outlet of the compression component (21), and the air inlet and the water inlet of the first heat dissipation component (3) are connected to the inner cavity of the water vapor separation component (22).

6. The combined air compressor according to claim 3, characterized in that: The combined air compressor comprises a first water pipe (5) and a fourth water pipe, wherein the two ends of the first water pipe (5) are respectively connected to the water inlet of the cooler and the water outlet of the first heat dissipation component (3), and the two ends of the fourth water pipe are respectively connected to the water outlet of the cooler and the water inlet of the first heat dissipation component (3).

7. The combined air compressor according to claim 1, characterized in that: The cooler is provided between the air outlet of the centrifugal unit (1) and the air inlet of the screw unit (2).

8. The combined air compressor according to claim 7, characterized in that: The combined air compressor comprises a fifth water pipe and a sixth water pipe, the water inlet of the cooler and the water outlet of the first heat dissipation component (3) are connected via the fifth water pipe, and the water outlet of the cooler and the water inlet of the screw unit (2) are connected via the sixth water pipe.

9. The combined air compressor according to any one of claims 1 to 8, characterized in that: The first heat dissipation component (3) comprises a radiator (31) and a fan (32), wherein the fan (32) is fixed on the radiator (31).

10. The combined air compressor according to any one of claims 1 to 8, characterized in that: The combined air compressor further comprises an air intake filter (9), which is arranged at the air inlet (10) and is used for filtering gas.

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