Air compressor

Abstract

An air compressor comprises an air storage tank, a pair of air cylinder assemblies, a driving assembly and a silencer. External gas is sucked in from the silencer and stored in the gas storage tank after being compressed, and the silencer comprises an upper cover and a lower cover which are covered with each other; the upper cover comprises an air inlet allowing external air to enter, the lower cover comprises an air outlet for discharging the external air entering the silencer to the air cylinder assembly, and the air compressor comprises a first air channel for guiding the external air from the air inlet to the lower cover and a second air channel for discharging the external air entering the lower cover from the air outlet to the air cylinder assembly. And the first air duct is communicated with the second air duct. According to the arrangement, external air flows into the upper cover from the air inlet, flows through the long path in the silencing device and then flows out of the air outlet, and noise generated when the air compressor sucks air is greatly reduced; meanwhile, the sponge is arranged in the upper cover, and the HEPA filter element is arranged in the lower cover, so that impurities in external air can be filtered while noise is absorbed, and the air inlet effect is not affected.

Description

[Technical field]

[0001] The utility model relates to the technical field of air compressors, in particular to an air compressor with an improved silencer. [Background Technology]

[0002] An air compressor is an industrial equipment that compresses gas. It is a device that converts mechanical energy into gas pressure energy. Air compressors are widely used in machinery, medical, food, automobile, chemical and building materials industries. The common piston compressors in our daily life include a gas storage tank, a motor installed on the gas storage tank, a drive mechanism driven by the motor and an exhaust pipe for transmitting gas. The motor drives the piston of the drive mechanism to make reciprocating linear motion in the cylinder, thereby performing suction and exhaust actions.

[0003] In addition, the air compressor needs to inhale a large amount of air during operation, and because the air compressor inhales air at a high frequency, the internal parts will generate a large noise during transmission, and the noise will be transmitted from the air inlet of the cylinder head, so the existing air compressor will install a muffler at the air inlet to reduce the noise generated by the air compressor when inhaling air. The existing two-cylinder oil-free air compressor currently sets the muffler between the two cylinders. Placing the muffler in the middle will make the structure of the muffler smaller, and the air duct inside the muffler will become shorter, making the muffler effect worse.

[0004] In view of this, it is indeed necessary to provide an improved air compressor to overcome the defects of the prior art. [Contents of the utility model]

[0005] In view of the deficiencies in the prior art, the utility model aims to provide an air compressor with an improved silencer, the silencer of the air compressor having a compact structure and good silencer effect.

[0006] The technical solution adopted by the utility model to solve the problems of the prior art is: an air compressor, comprising an air storage tank, a pair of cylinder assemblies fixed above the air storage tank, a driving assembly accommodated in the pair of cylinder assemblies and a silencer connected in the middle of the pair of cylinder assemblies; the driving assembly reciprocates in the pair of cylinder assemblies, external gas is sucked in from the silencer, compressed and stored in the air storage tank, the silencer comprises an upper cover and a lower cover covering each other; the upper cover comprises an air inlet for external gas to enter, the lower cover comprises an air outlet for discharging the external gas entering the silencer to the cylinder assembly, the air compressor comprises a first air duct for guiding the external gas from the air inlet to the lower cover and a second air duct for discharging the external gas entering the lower cover from the air outlet to the cylinder assembly, the first air duct and the second air duct are connected.

[0007] A further improvement scheme is: the air inlet is located at the front end wall of the upper cover, and the air inlet extends backward from the front end wall of the upper cover to form an air inlet pipe; the upper cover extends downward from the upper top wall to form a protrusion, and the air inlet pipe passes through the front end and the rear end of the protrusion; a sponge cavity is formed between the protrusion and the rear end wall of the upper cover, and a sponge is placed in the sponge cavity.

[0008] A further improvement scheme is: the lower cover extends upward from the lower wall to form a spoiler, and the left and right sides of the spoiler cooperate with the upper cover to form an opening; the protrusion and the outer side of the spoiler and the side walls of the upper cover and the lower cover are arranged to form a steady flow space, the steady flow space is located at the front end of the silencer, and the opening is connected to the steady flow space.

[0009] A further improvement is as follows: a notch is provided at the front end of the protrusion, and the notch is connected to the steady flow space; external gas enters the rear end of the lower cover, flows through the opening to the steady flow space, and then flows into the notch.

[0010] A further improvement scheme is: an arc-shaped guide plate is provided at the rear end of the notch, and the guide plate is located on the inner side of the protrusion; the baffle plate and the lower bottom wall of the lower cover are arranged to form a filter element cavity, and the notch guides the external gas to the left and right sides along the arc surface of the guide plate and flows to the top of the filter element cavity.

[0011] A further improvement is as follows: the lower end of the baffle includes an air outlet, the lower cover includes an air outlet pipe extending outward from the air outlet, and external gas flows from top to bottom from the top of the filter element cavity to the air outlet, and flows out of the silencer through the air outlet pipe.

[0012] A further improvement scheme is: the first air duct includes a first path for external gas to flow out from the air inlet through the air inlet pipe to the sponge cavity, a second path for external gas to flow from the sponge cavity through the opening to the steady flow space, and a third path for external gas to flow from the steady flow space through the slot to the top of the filter element cavity.

[0013] A further improvement is that the second air duct includes a fourth path for external air to flow from above the filter element cavity through the filter element cavity into the air outlet and a fifth path for external air to flow from the air outlet through the air outlet pipe to the cylinder assembly.

[0014] A further improved solution is: the silencer device includes a connecting pipe connected to the cylinder assembly, and the connecting pipe passes through the left and right ends of the lower cover.

[0015] A further improvement is that the silencer is located between a pair of cylinder assemblies in the left-right direction, and the installation height of the silencer does not exceed the height of the cylinder assemblies in the up-down direction.

[0016] Compared with the prior art, the utility model has the following beneficial effects: the upper cover includes an air inlet for external air to enter, the lower cover includes an air outlet for discharging the external air entering the silencer to the cylinder assembly, the air compressor includes a first air duct for guiding the external air from the air inlet to the lower cover and a second air duct for discharging the external air entering the lower cover from the air outlet to the cylinder assembly, and the first air duct and the second air duct are connected. In this arrangement, the external air flows into the upper cover from the air inlet, flows through a long path inside the silencer, and then flows out from the air outlet, which greatly reduces the noise generated by the air compressor during air intake; at the same time, the sponge is arranged in the upper cover and the HEPA filter element is arranged in the lower cover, which can filter impurities in the external air while absorbing the noise without affecting the air intake effect. [Drawings]

[0017] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings:

[0018] Figure 1 It is a three-dimensional schematic diagram of the air compressor of the utility model;

[0019] Figure 2 yes Figure 1 An exploded schematic diagram of a silencer device of an air compressor shown;

[0020] Figure 3 yes Figure 2 A three-dimensional schematic diagram of the upper cover of the air compressor shown;

[0021] Figure 4 yes Figure 2 A three-dimensional schematic diagram of the lower cover of the air compressor shown.

[0022] Meaning of the reference numerals in the figures:

[0023] Air compressor 100 Air tank 1

[0024] Cylinder assembly 2 Cylinder head 20

[0025] Cylinder 21 Muffler 3

[0026] Upper cover 30 Air inlet 301

[0027] Inlet pipe 3010 Inverted 302

[0028] Sponge cavity 303 protrusion 304

[0029] Opening 3040 Notch 3041

[0030] Drain plate 305 Lower cover 31

[0031] Air outlet pipe 311 Air outlet 312

[0032] Card slot 313 Connecting pipe 314

[0033] Baffle 315 Filter chamber 3150

[0034] Sponge 32 Hepa filter 33

[0035] Steady flow space 34 Capacitor box 4

[0036] Handle 5 Roller 6 [Specific implementation method]

[0037] The terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. For example, the words "upper", "lower", "front", "back", etc., which indicate the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0038] See also Figures 1 to 4 The utility model is shown as an air compressor 100, which includes a cylindrical gas tank 1, a motor assembly (not shown) fixed above the gas tank 1, a pair of cylinder assemblies 2 connected to both ends of the motor assembly, a driving assembly (not shown) accommodated in the pair of cylinder assemblies 2, a silencer 3 connected to the pair of cylinder assemblies 2, a capacitor box 4 fixed to the outer periphery of the gas tank 1, a handle 5 installed on the pair of cylinder assemblies 2 and a roller 6 installed below the gas tank 1.

[0039] The motor assembly drives the driving assembly to reciprocate in the pair of cylinder assemblies 2, and external gas is sucked in from the silencer 3 and stored in the gas storage tank 1 after being compressed; the handle 5 is located in front of the pair of cylinder assemblies 2, and by lifting and pulling the handle 5, the air compressor 100 can be moved to different work places with the assistance of the roller 6, which is convenient and quick.

[0040] Furthermore, the pair of cylinder assemblies 2 includes a cylinder head 20 disposed at the upper end and a cylinder body 21 located below the cylinder head 20 .

[0041] The capacitor box 4 is arranged adjacent to the motor assembly to facilitate electrical connection between the two; a capacitor (not shown) is installed inside the capacitor box 4, and the capacitor can stabilize power output, store electrical energy, and eliminate irregular fluctuations in the power supply, thereby providing a strong guarantee for the normal operation of the air compressor 100.

[0042] See also Figures 2 to 4 As shown, the silencer 3 includes an upper cover 30 and a lower cover 31 that cover each other, the upper cover 30 includes a buckle 302 located at the front end, the lower cover 31 includes a slot 313 located at the front end, and the buckle 302 and the slot 313 cooperate with each other to lock the upper cover 30 and the lower cover 31.

[0043] The upper cover 30 includes an air inlet 301 for external air to enter, and the air inlet 301 is located at the front end wall of the upper cover 30. The air inlet 301 extends backward from the front end wall of the upper cover 30 to form an air inlet pipe 3010; external air enters from the air inlet 301 and flows through the air inlet pipe 3010 before entering the rear end of the upper cover 30.

[0044] The upper cover 30 extends downward from the upper end wall to form a protrusion 304, and the air intake pipe 3010 is passed through the front end and the rear end of the protrusion 304; a sponge cavity 303 is formed between the protrusion 304 and the rear end wall of the upper cover 30, and a sponge 32 is placed in the sponge cavity 303.

[0045] The lower cover 31 extends upward from the lower end wall to form a spoiler 315, and the left and right sides of the spoiler 315 cooperate with the upper cover 30 to form an opening 3040; the protrusion 304 and the outer side of the spoiler 315 and the side walls of the upper cover 30 and the lower cover 31 are surrounded to form a steady flow space 34, and the steady flow space 34 is located at the front end of the silencer 3, and the opening 3040 is connected to the steady flow space 34.

[0046] After the external air flows into the rear end of the upper cover 30, it reaches the sponge cavity 303, passes through the sponge 32, and flows into the steady flow space 34 through the opening 3040; placing the sponge 32 can reduce the noise generated by the air compressor 100 during the air intake process, and at the same time filter the impurities in the external air without reducing the air intake efficiency of the air compressor 100.

[0047] Furthermore, a slot 3041 is provided at the front end of the protrusion 304, and the slot 3041 is connected to the flow stabilizing space 34; a guide plate 305 is provided at the rear end of the slot 3041, and the guide plate 305 is located on the inner side of the protrusion 304; the baffle plate 315 and the lower end wall of the lower cover 31 are arranged to form a filter element cavity 3150.

[0048] The notch 3041 guides the external gas from the steady flow space 34 to the left and right sides along the surface of the guide plate 305 and flows to the top of the filter element cavity 3150; in this embodiment, in order to improve the guiding effect, the guide plate 305 is set to be arc-shaped.

[0049] The lower cover 31 includes an air outlet 312 for discharging external gas entering the silencer 3 to the cylinder assembly 2. The air outlet 312 is located at the lower end of the baffle 315, and the air outlet 312 penetrates outward to form an air outlet pipe 311; the external gas flows from top to bottom from the top of the filter element cavity 3150 to the air outlet 312, and flows out of the silencer 3 through the air outlet pipe 311.

[0050] Furthermore, in order to improve the silencing effect, a HEPA filter element 33 is arranged in the filter element cavity 3150. The HEPA filter element 33 can reduce the noise generated when the external gas flows through, and at the same time filter the impurities in the external gas without reducing the suction efficiency of the air compressor 100.

[0051] The air compressor 100 includes a first air duct (not shown) for guiding external air from the air inlet 301 to the lower cover 31 and a second air duct (not shown) for discharging the external air entering the lower cover 31 from the air outlet 312 to the cylinder assembly 2, and the first air duct is connected to the second air duct.

[0052] Specifically, the first air duct includes a first path for external gas to flow from the air inlet 301 through the air inlet pipe 3010 to the sponge cavity 303, a second path for external gas to flow from the sponge cavity 303 through the opening 3040 to the steady flow space 34, and a third path for external gas to flow from the steady flow space 34 through the slot 3041 to the top of the filter element cavity 3150.

[0053] The second air duct includes a fourth path for external air to flow from above the filter element cavity 3150 through the filter element cavity 3150 into the air outlet 312 , and a fifth path for external air to flow from the air outlet 312 through the air outlet pipe 311 to the cylinder assembly 2 .

[0054] Furthermore, the silencer 3 includes a connecting pipe 314 connected to the cylinder assembly 2 , and the connecting pipe 314 passes through the left and right ends of the lower cover 31 . The connecting pipe 314 can fix the silencer 3 to the cylinder assembly 2 more stably.

[0055] The silencer 3 is located between the pair of cylinder assemblies 2 in the left-right direction, and the installation height of the silencer 3 in the up-down direction does not exceed the height of the cylinder assemblies 2 .

[0056] In this embodiment, the upper cover 30 includes an air inlet 301 for external air to enter, the lower cover 31 includes an air outlet 312 for discharging the external air entering the silencer 3 to the cylinder assembly 2, and the air compressor 100 includes a first air duct for guiding the external air from the air inlet 301 to the lower cover 31 and a second air duct for discharging the external air entering the lower cover 31 from the air outlet 312 to the cylinder assembly 2, and the first air duct and the second air duct are connected. In this arrangement, the external air flows into the upper cover 301 from the air inlet 301, flows through a long path inside the silencer 3, and then flows out from the air outlet 312, which greatly reduces the noise generated by the air compressor 100 when inhaling air; at the same time, the sponge 32 is arranged in the upper cover 30 and the HEPA filter element 33 is arranged in the lower cover 31, which can filter impurities in the external air while absorbing noise without affecting the air intake effect.

[0057] The utility model is not limited to the above specific implementations. Those skilled in the art can easily understand that there are many alternatives to the air compressor of the utility model without departing from the principle and scope of the utility model. The protection scope of the utility model shall be based on the content of the claims.

Claims

1. An air compressor, comprising an air storage tank, a pair of cylinder assemblies fixed above the air storage tank, a driving assembly housed in the pair of cylinder assemblies, and a silencer connected between the pair of cylinder assemblies; the driving assembly reciprocates in the pair of cylinder assemblies, external gas is sucked in from the silencer, compressed and stored in the air storage tank, and the silencer comprises an upper cover and a lower cover covering each other; characterized in that: The upper cover includes an air inlet for external air to enter, the lower cover includes an air outlet for discharging the external air entering the silencer to the cylinder assembly, the air compressor includes a first air duct for guiding the external air from the air inlet to the lower cover and a second air duct for discharging the external air entering the lower cover from the air outlet to the cylinder assembly, the first air duct and the second air duct are connected; the air inlet is located at the front end wall of the upper cover, the air inlet extends backward from the front end wall of the upper cover to form an air inlet pipe; the upper cover extends downward from the upper end wall to form a protrusion, and the air inlet pipe is passed through the front end and the rear end of the protrusion.

2. The air compressor according to claim 1, characterized in that: A sponge cavity is formed between the protrusion and the rear end wall of the upper cover, and a sponge is placed in the sponge cavity.

3. The air compressor according to claim 2, characterized in that: The lower cover extends upward from the lower end wall to form a spoiler, and the left and right sides of the spoiler cooperate with the upper cover to form an opening; the protrusion and the outer side of the spoiler and the side walls of the upper cover and the lower cover are arranged to form a steady flow space, and the steady flow space is located at the front end of the silencer, and the opening is connected to the steady flow space.

4. The air compressor according to claim 3, characterized in that: A notch is formed at the front end of the protrusion, and the notch is connected to the steady flow space; external gas enters the rear end of the lower cover, flows through the opening to the steady flow space, and then flows into the notch.

5. The air compressor according to claim 4, characterized in that: A guide plate is provided at the rear end of the notch, and the guide plate is located on the inner side of the protrusion; the baffle plate and the lower end wall of the lower cover are arranged to form a filter element cavity, and the notch guides external gas to the left and right sides along the surface of the guide plate and flows to the top of the filter element cavity.

6. The air compressor according to claim 5, characterized in that: The lower end of the baffle includes an air outlet, and the lower cover includes an air outlet pipe extending outward from the air outlet. External gas flows from top to bottom from the top of the filter element cavity to the air outlet, and flows out of the silencer through the air outlet pipe.

7. The air compressor according to claim 6, characterized in that: The first air duct includes a first path for external air to flow from the air inlet through the air inlet pipe to the sponge cavity, a second path for external air to flow from the sponge cavity through the opening to the steady flow space, and a third path for external air to flow from the steady flow space through the slot to the top of the filter element cavity.

8. The air compressor according to claim 7, characterized in that: The second air duct includes a fourth path for external air to flow from above the filter element cavity through the filter element cavity into the air outlet and a fifth path for external air to flow from the air outlet through the air outlet pipe to the cylinder assembly.

9. The air compressor according to claim 1, characterized in that: The muffler device comprises a connecting pipe connected to the cylinder assembly, and the connecting pipe passes through the left and right ends of the lower cover.

10. The air compressor according to claim 1, characterized in that: The silencer is located between the pair of cylinder assemblies in the left-right direction, and the installation height of the silencer does not exceed the height of the cylinder assemblies in the up-down direction.

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