An energy-saving screw air compressor

Abstract

The present invention relates to the technical field of air compression equipment, and specifically, to an energy-saving screw air compressor. It includes a housing and an air filter assembly, a main motor, a screw air compressor main engine, an oil filter assembly, an oil and gas barrel, and a control system and a cooling system; the cooling system includes an air intake mechanism, a plate-fin heat exchanger, and an exhaust mechanism, the air intake mechanism includes an air intake blade and an air inlet mounted on the shaft of the main motor, and the exhaust mechanism includes an exhaust port, a valve plate mounted at the exhaust port, and a valve plate driving device for driving the valve plate to open and close. The present invention utilizes the main motor to drive the air intake blade to inhale cold air into the housing to cool the unit without the need to install a power frequency cooling fan, thereby reducing the production cost and maintenance cost of the equipment, and at the same time reducing the cost of using the equipment; in addition, an exhaust port is opened on the housing and a rotatable valve plate is provided, and the temperature of the unit is controlled by controlling the opening and closing of the valve plate.

Description

Technical Field

[0001] The invention relates to the technical field of air compression equipment, in particular to an energy-saving screw air compressor. Background Art

[0002] Screw air compressors generate a lot of heat when compressing air, so the unit needs to be cooled. The existing cooling method for screw air compressors is to equip the unit with an additional power frequency cooling fan. When the unit temperature reaches the highest set temperature, the power frequency cooling fan starts to cool the unit. When the unit temperature drops to the lowest set temperature, the power frequency cooling fan stops working and waits for the next start to cool the unit.

[0003] This cooling method has the following problems: 1. The additional power-frequency cooling fan increases the production cost of the equipment and also increases the cost of equipment maintenance; 2. The starting current of the power-frequency cooling fan is very large, and frequent start and stop greatly increase the power consumption of the equipment and increase the user's usage costs; 3. The power-frequency cooling fan will generate a lot of noise during the cooling process, causing noise pollution to the environment. Summary of the invention

[0004] The purpose of the present invention is to provide an energy-saving screw air compressor to solve the above technical problems.

[0005] To solve the above problems, the technical solution adopted by the present invention is:

[0006] An energy-saving screw air compressor comprises a casing and an air filter assembly, a main motor, a screw air compressor main engine, an oil filter assembly, and an oil and gas barrel arranged in an inner cavity of the casing, and also comprises a control system for controlling the operation of the entire unit and a cooling system for cooling the entire unit; the cooling system comprises an air inlet mechanism, a plate-fin heat exchanger mounted on the casing, and an air exhaust mechanism, the air inlet mechanism comprises an air inlet blade mounted on the shaft of the main motor and an air inlet port opened on the casing corresponding to the air inlet blade, the air exhaust mechanism comprises an air outlet opened on the casing, a valve plate mounted at the air outlet, and a valve plate driving device for driving the valve plate to open and close.

[0007] Preferably, the valve plate has a size matching that of the air outlet and is assembled on the side wall of the air outlet via a rotating shaft.

[0008] Preferably: the valve plate driving device adopts a cylinder, the bottom of the cylinder body is hingedly connected to a cylinder seat fixedly assembled on the box body through a rotating support shaft, the end of the cylinder telescopic rod is connected to the rotating shaft, and the solenoid valve of the cylinder is connected to and controlled by a control system.

[0009] Preferably, the air inlet blade comprises a blade sleeve and a plurality of inclined plate blades evenly arranged along the circumferential direction of the blade sleeve, and the number of the inclined plate blades is 5-9.

[0010] Preferably: a grille plate is mounted on the box at the air inlet.

[0011] Preferably, an exhaust mesh cover is provided at the exhaust port.

[0012] Preferably, the driving form of the valve plate driving device includes but is not limited to a pneumatic cylinder, an oil cylinder and an electric push rod.

[0013] Beneficial effects: Compared with the prior art, the present invention utilizes the main motor to drive the air inlet blades to rotate and inhale cold air into the box body to cool the unit without the need to additionally install an industrial frequency cooling fan, thereby reducing the production cost and maintenance cost of the equipment, while also saving electricity consumption and reducing the cost of using the equipment; in addition, an exhaust port is opened on the box body and a rotatable valve plate is provided at the exhaust port, and the temperature of the unit is controlled by controlling the opening and closing of the valve plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A side structural schematic diagram of an embodiment of the present invention;

[0015] Figure 2 The figure is a schematic diagram of a top view of the structure of an embodiment of the present invention. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0017] Example

[0018] Reference Figure 1-Figure 2 The energy-saving screw air compressor described in this embodiment includes a housing 1 and an air filter assembly 2, a main motor 3, a screw air compressor main unit 4, an oil filter assembly 5, and an oil and gas barrel 6 arranged in the inner cavity of the housing 1, and also includes a control system for controlling the operation of the entire unit and a cooling system for cooling the entire unit. The cooling system includes an air intake mechanism, a plate-fin heat exchanger 7 mounted on the housing 1, and an exhaust mechanism, wherein:

[0019] The air inlet mechanism includes an air inlet blade mounted on the main motor shaft and an air inlet 8 corresponding to the air inlet blade opened on the housing 1. The air inlet blade includes a blade sleeve 15 and 9 inclined plate blades 16 evenly arranged along the circumference of the blade sleeve 15. A grille plate is mounted on the housing 1 at the air inlet 8.

[0020] The exhaust mechanism includes an exhaust port 9 opened on the housing 1, a valve plate 10 mounted at the exhaust port 9, and a valve plate driving device for driving the valve plate 10 to open and close. The size of the valve plate 10 matches the exhaust port 9, and is mounted on the side wall of the exhaust port 9 through a rotating shaft 11. The valve plate driving device uses a cylinder 12, the bottom of the cylinder body of the cylinder 12 is hinged to a cylinder seat 14 fixedly mounted on the housing 1 through a rotating support shaft 13, the end of the telescopic rod of the cylinder 12 is connected to the rotating shaft 11, and the solenoid valve of the cylinder 12 is connected to and controlled by a control system. An exhaust mesh cover is provided at the exhaust port 9.

[0021] The air inlet blades described in this embodiment are installed on the main motor shaft at the position of the original main motor cooling blades (i.e., the air inlet blades are used to replace the original main motor cooling blades). After the equipment is started, the main motor shaft rotates to drive the air inlet blades to rotate, and the cold air is sucked into the box body 1. Using the air inlet blades to replace the original main motor cooling blades not only cools the main motor 3, but also cools the entire unit.

[0022] The air filter assembly 2, main motor 3, screw air compressor main unit 4, oil filter assembly 5, oil and gas barrel 6 and plate-fin heat exchanger 7 described in the present invention all adopt existing technologies, and their specific structures, working principles and assembly methods between the various components are not repeated here.

[0023] As other embodiments of the present invention, the valve plate driving device may also adopt an oil cylinder or an electric push rod.

[0024] The working principle of the present invention is briefly described as follows:

[0025] According to the needs of the unit, the maximum and minimum temperatures of the unit are set, and the unit is started (at this time, the valve plate 10 is in the open state). The main motor shaft rotates to drive the air inlet blades to rotate, and the cold air is sucked into the box body 1 from the air inlet 8 and discharged from the air outlet 9 without resistance (because the plate-fin heat exchanger 7 has resistance when exhausting air, most of the cold air will be discharged from the air outlet 9 without resistance). When the temperature in the unit rises to the highest set temperature, the control system controls the cylinder 12 to move, driving the shaft 11 to rotate and close the valve plate 10. At this time, the cold air entering the box body 1 from the air inlet 8 is discharged from the plate-fin heat exchanger 7. In this process, the entire unit is cooled down. When the temperature in the unit drops to the lowest set temperature, the control system controls the cylinder 12 to move, driving the shaft 11 to rotate and open the valve plate 10, and the cold air entering the box body 1 from the air inlet 8 is discharged from the air outlet 9 without resistance, and the plate-fin heat exchanger 7 no longer cools the unit. In this way, the temperature of the unit is controlled by opening and closing the control valve plate 10 .

[0026] The present invention utilizes the main motor to drive the air inlet blades to rotate and draw cold air into the box body to cool the unit without the need to additionally install an industrial frequency cooling fan, thereby reducing the production cost and maintenance cost of the equipment, while also reducing electricity consumption and the cost of using the equipment; in addition, an exhaust port is opened on the box body and a rotatable valve plate is provided at the exhaust port, and the temperature of the unit is controlled by controlling the opening and closing of the valve plate.

[0027] The above are only implementation modes of the present invention, and are not intended to limit the patent scope of the present invention. On the other hand, any equivalent structure made using the contents of the specification and drawings of the present invention, directly or indirectly used in other related technical fields, are also within the patent protection scope of the present invention.

Claims

1. An energy-saving screw air compressor, comprising a housing (1), an air filter assembly (2) arranged in an inner cavity of the housing (1), a main motor (3), a screw air compressor main unit (4), an oil filter assembly (5), and an oil and gas tank (6), and also comprising a control system for controlling the operation of the entire unit and a cooling system for cooling the entire unit; characterized in that: The cooling system comprises an air intake mechanism, a plate-fin heat exchanger (7) mounted on a housing (1), and an air exhaust mechanism, wherein the air intake mechanism comprises an air intake blade mounted on a main motor shaft and an air intake port (8) disposed on the housing (1) and corresponding to the air intake blade, and the air exhaust mechanism comprises an air exhaust port (9) disposed on the housing (1), a valve plate (10) mounted at the air exhaust port (9), and a valve plate driving device for driving the valve plate (10) to open and close; The size of the valve plate (10) matches that of the exhaust port (9), and is mounted on the side wall of the exhaust port (9) via a rotating shaft (11); the valve plate driving device adopts a cylinder (12), the bottom of the cylinder body of the cylinder (12) is hingedly connected to a cylinder seat (14) fixedly mounted on the box body (1) via a rotating support shaft (13), the end of the telescopic rod of the cylinder (12) is connected to the rotating shaft (11), and the solenoid valve of the cylinder (12) is connected to and controlled by a control system; When the temperature inside the unit rises to the highest set temperature, the control system controls the cylinder to move, driving the shaft to rotate and close the valve plate, and the cold air entering the box is discharged through the plate-fin heat exchanger; when the temperature inside the unit drops to the lowest set temperature, the control system controls the cylinder to move, driving the shaft to rotate and open the valve plate, and the cold air entering the box is discharged through the air outlet without resistance, and the plate-fin heat exchanger no longer cools the unit.

2. The energy-saving screw air compressor according to claim 1, characterized in that: The air inlet blade comprises a blade sleeve (15) and a plurality of inclined plate blades (16) uniformly arranged along the circumferential direction of the blade sleeve (15), wherein the number of the inclined plate blades (16) is 5-9.

3. The energy-saving screw air compressor according to claim 1, characterized in that: A grille plate is mounted on the box body (1) at the air inlet (8).

4. The energy-saving screw air compressor according to claim 1, characterized in that: An exhaust mesh cover is provided at the exhaust port (9).

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