Cold starting device of oilless air compressor

Abstract

The utility model provides a cold starting device of an oilless air compressor, and belongs to the technical field of machinery. The oil-free air compressor solves the problems that an existing oil-free air compressor is low in cold starting speed and high in starting voltage requirement. The cold starting device of the oilless air compressor comprises a valve seat, one end of the valve seat is a connecting end, the connecting end is connected to a cylinder cover or a conveying assembly and communicates with an air outlet cavity, an air outlet channel is formed in the middle of the valve seat, a valve element and a spring are arranged in the valve seat, and the spring can push the valve seat to enable the air outlet channel to be in an open state. The valve element can axially move to overcome the elastic force of the spring and block the air outlet channel. The cold starting device of the oilless air compressor has the advantages that the oilless air compressor can be smoothly cold-started, the requirement on starting voltage is low, and the energy consumption is low.

Description

Technical Field

[0001] The utility model belongs to the technical field of machinery and relates to an air compressor, in particular to a cold starting device of an oil-free air compressor. Background Art

[0002] Air compressors are widely used in industries such as decoration, healthcare, electronic packaging, and food packaging. Oil-free air compressors that can output oil-free air are especially popular and favored by users because of their simple operation and convenient maintenance.

[0003] For example, a new type of commercial silent air compressor (application number: 201821867262.8) disclosed in a Chinese patent document includes an air storage tank, a mounting frame, a universal wheel, a filtering system, a fully enclosed piston air conditioning compressor, a drying filter, an oil return valve, a voltage switch, a fully automatic power-off protection switch, a pressure relief valve, a pressure gauge, a high-pressure air pipe, and a high-pressure exhaust valve. However, when the new type of commercial silent air compressor is cold-started, due to the existing air pressure at the outlet end of the fully enclosed piston air conditioning compressor, the air conditioning compressor has a slow cold-start speed and a high starting voltage requirement. Summary of the invention

[0004] The utility model aims to solve the above problems in the prior art and proposes a cold starting device for an oil-free air compressor which can enable the oil-free air compressor to start cold smoothly, has low requirements on starting voltage and low energy consumption.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a cold starting device for an oil-free air compressor, the oil-free air compressor includes a motor, a cylinder body, a cylinder head, a crankshaft, a connecting rod and an air storage tank, the cylinder head is provided with an air outlet cavity, the air outlet cavity and the air storage tank are connected through an air delivery component, the cold starting device includes a valve seat, characterized in that one end of the valve seat is a connecting end, the connecting end is connected to the cylinder head or the delivery component and is connected to the air outlet cavity, the middle part of the valve seat is provided with an air outlet channel, the valve seat is provided with a valve core and a spring, the spring can push the valve seat to make the air outlet channel in an open state, the valve core can move axially to overcome the elastic force of the spring and block the air outlet channel.

[0006] The connecting end of the valve seat is connected to the cylinder head and communicated with the air outlet cavity or the air delivery component. When the oil-free air compressor is cold started, the spring pushes the valve seat to open the air outlet passage. The pressure in the air outlet cavity of the oil-free air compressor is the same as the pressure outside. The motor of the oil-free air compressor can start smoothly. After starting, the pressure of the oil-free air compressor reaches a level that can overcome the elastic force of the spring and push the valve seat to move to block the air outlet passage. At this time, the compressed air of the oil-free air compressor is delivered to the air storage tank through the air delivery component, which has the advantages of fast and convenient cold start, low starting voltage requirement, and reduced energy consumption.

[0007] In the cold start device of the oil-free air compressor, an annular convex body is provided at one end of the valve core, a sealing ring is embedded in the valve seat, and the annular convex body can press against the sealing ring. The valve core moves axially so that the annular convex body presses against the sealing ring to form a seal, thereby blocking the air outlet channel, which has the advantages of simple structure and reliable operation.

[0008] In the cold start device of the oil-free air compressor, the other end of the valve core is provided with a shaft shoulder, and the two ends of the spring respectively abut against the shaft shoulder and the inner end surface of the valve seat. The two ends of the spring abut against the shaft shoulder and the valve seat, which has the advantage of good positioning effect on the spring and avoids the deviation of the spring.

[0009] In the cold start device of the oil-free air compressor, the connection end is threadedly connected to the cylinder head and communicates with the air outlet cavity. The connection end is threadedly connected to the cylinder head, which has the advantages of simple structure and convenient disassembly and assembly.

[0010] In the cold start device of the oil-free air compressor, the gas storage tank is threadedly connected with a connecting joint, the connecting joint is connected with a solenoid valve and a one-way valve, and the valve seat is threadedly connected to the connecting joint. The valve seat is threadedly connected to the connecting joint, which has the advantages of compact structure and convenient manufacturing.

[0011] In the cold start device of the oil-free air compressor, the inner end of the valve seat is provided with a retaining spring, and the outer end surface of the annular convex body can press against the retaining spring. The above arrangement avoids the valve core from falling off and improves the reliability of the structure.

[0012] Compared with the prior art, the cold start device of the oil-free air compressor has the following advantages: 1. When the oil-free air compressor is cold started, the spring pushes the valve seat to open the air outlet passage, and the pressure in the air outlet chamber of the oil-free air compressor is the same as the pressure outside, so that the motor of the oil-free air compressor can start smoothly. After starting, the pressure of the oil-free air compressor reaches a level that can overcome the elastic force of the spring and push the valve seat to move to block the air outlet passage. At this time, the compressed air of the oil-free air compressor is transported to the air storage tank through the air delivery component, which has the advantages of fast and convenient cold start, low starting voltage requirement, and reduced energy consumption;

[0013] 2. The valve core moves axially to press the annular convex body against the sealing ring to form a seal, so that the air outlet channel is blocked, which has the advantages of simple structure and reliable operation;

[0014] 3. Both ends of the spring are against the shaft shoulder and the valve seat, which has the advantage of good positioning effect on the spring and avoids the deviation of the spring;

[0015] 4. The valve seat is threadedly connected to the connecting joint, which has the advantages of compact structure and easy manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional schematic diagram of the cold start device of the oil-free air compressor.

[0017] Figure 2 It is a schematic diagram of an oil-free air compressor equipped with the cold start device.

[0018] Figure 3 yes Figure 2 A is a partial enlarged schematic diagram of .

[0019] Figure 4 It is a schematic diagram of another mode of an air compressor equipped with the cold start device.

[0020] In the figure, 1, valve seat; 1a, connecting end; 1b, air outlet channel; 2, valve core; 2a, annular convex body; 2b, shaft shoulder; 3, spring; 4, sealing ring; 5, retaining ring; 6, oil-free air compressor; 7, motor; 8, cylinder body; 9, cylinder head; 9a, air outlet cavity; 10, crankshaft; 11, connecting rod; 12, air storage tank; 13, air delivery assembly; 14, connecting joint; 14a, solenoid valve; 14b, one-way valve. DETAILED DESCRIPTION

[0021] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0022] like Figures 1 to 3 As shown, the cold starting device of the oil-free air compressor, the oil-free air compressor 6 includes a motor 7, a cylinder block 8, a cylinder head 9, a crankshaft 10, a connecting rod 11 and an air storage tank 12, the cylinder head 9 is provided with an air outlet cavity 9a, the air outlet cavity 9a is connected to the air storage tank 12 through an air delivery component 13, the cold starting device includes a valve seat 1, one end of the valve seat 1 is a connecting end 1a, which is on the delivery component and connected to the air outlet cavity 9a, an air outlet channel 1b is provided in the middle of the valve seat 1, a valve core 2 and a spring 3 are provided in the valve seat 1, the spring 3 can push the valve seat 1 to make the air outlet channel 1b in an open state, and the valve core 2 can move axially to overcome the elastic force of the spring 3 and block the air outlet channel 1b.

[0023] An annular convex body 2a is provided at one end of the valve core 2, and a sealing ring 4 is embedded in the valve seat 1. The annular convex body 2a can press against the sealing ring 4 to form a seal, so that the air outlet channel 1b is blocked, which has the advantages of simple structure and reliable operation. A shaft shoulder 2b is provided at the other end of the valve core 2, and the two ends of the spring 3 respectively press against the shaft shoulder 2b and the inner end surface of the valve seat 1, which has the advantage of good positioning effect on the spring 3 and avoids the deviation of the spring 3. A retaining spring 5 is provided at the inner end of the valve seat 1, and the outer end surface of the annular convex body 2a can press against the retaining spring 5, which avoids the valve core 2 from falling off and improves the reliability of the structure.

[0024] The gas storage tank 12 is threadedly connected with a connecting joint 14, and the connecting joint 14 is connected with a solenoid valve 14a and a one-way valve 14b. The valve seat 1 is threadedly connected to the connecting joint 14, and has the advantages of compact structure and convenient manufacturing.

[0025] The connection end 1a of the valve seat 1 is connected to the cylinder head 9 and communicated with the air outlet cavity 9a or the air delivery component 13. When the oil-free air compressor 6 is cold-started, the spring 3 pushes the valve seat 1 to open the air outlet passage 1b. The pressure in the air outlet cavity 9a of the oil-free air compressor 6 is the same as the pressure outside. The motor 7 of the oil-free air compressor 6 can start smoothly. After starting, the pressure of the oil-free air compressor 6 reaches a level that can overcome the elastic force of the spring 3 and push the valve seat 1 to move and block the air outlet passage 1b. At this time, the compressed air of the oil-free air compressor 6 is delivered to the air storage tank 12 through the air delivery component 13, which has the advantages of fast and convenient cold start, low starting voltage requirement, and reduced energy consumption.

[0026] As another way, Figure 4 As shown, the connection end 1a of the valve seat 1 is threadedly connected to the cylinder cover 9 and communicates with the air outlet cavity 9a, which has the advantages of simple structure and convenient disassembly and assembly.

[0027] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0028] Although this article uses more terms such as valve seat 1, connecting end 1a, air outlet channel 1b, valve core 2, annular convex body 2a, shaft shoulder 2b, spring 3, sealing ring 4, retaining ring 5, oil-free air compressor 6, motor 7, cylinder body 8, cylinder head 9, air outlet cavity 9a, crankshaft 10, connecting rod 11, air storage tank 12, air delivery component 13, connecting joint 14, solenoid valve 14a, check valve 14b, etc., it does not exclude the possibility of using other terms. The use of these terms is only for more convenient description and explanation of the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A cold start device for an oil-free air compressor, comprising a valve seat (1), characterized in that: One end of the valve seat (1) is a connecting end (1a), an air outlet channel (1b) is provided in the middle of the valve seat (1), a valve core (2) and a spring (3) are provided inside the valve seat (1), the spring (3) can push the valve seat (1) to open the air outlet channel (1b), and the valve core (2) can move axially to overcome the elastic force of the spring (3) and block the air outlet channel (1b).

2. The cold start device for an oil-free air compressor according to claim 1, characterized in that: An annular protrusion (2a) is provided at one end of the valve core (2), a sealing ring (4) is embedded in the valve seat (1), and the annular protrusion (2a) can be pressed against the sealing ring (4).

3. The cold start device for an oil-free air compressor according to claim 1, characterized in that: The other end of the valve core (2) is provided with a shaft shoulder (2b), and the two ends of the spring (3) respectively abut against the shaft shoulder (2b) and the inner end surface of the valve seat (1).

4. The cold start device for an oil-free air compressor according to claim 1, 2 or 3, characterized in that: The oil-free air compressor comprises a cylinder head (9), wherein the cylinder head (9) is provided with an air outlet cavity (9a), and the connecting end (1a) is threadedly connected to the cylinder head (9) and communicated with the air outlet cavity (9a).

5. The cold start device for an oil-free air compressor according to claim 1, 2 or 3, characterized in that: The oil-free air compressor comprises an air storage tank (12), a connecting joint (14) is threadedly connected to the air storage tank (12), a solenoid valve (14a) and a one-way valve (14b) are connected to the connecting joint (14), and the valve seat (1) is threadedly connected to the connecting joint (14).

6. The cold start device for an oil-free air compressor according to claim 2, characterized in that: The inner end of the valve seat (1) is provided with a retaining spring (5), and the outer end surface of the annular protrusion (2a) can be pressed against the retaining spring (5).

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