Air compressor

Abstract

An air compressor comprises an air storage tank, a pair of air cylinder assemblies fixed to the upper portion of the air storage tank, a driving assembly contained in the pair of air cylinder assemblies and a silencer connected to the pair of air cylinder assemblies. The driving assembly reciprocates in the pair of air cylinder assemblies so as to suck external air from the silencer, the external air is compressed and then stored in the air storage tank, and the silencer comprises an upper cover and a lower cover which are covered with each other; the lower cover comprises an air inlet for external air to enter, an air outlet for discharging the external air entering the silencer to the air cylinder assembly and a noise reduction air channel for guiding the external air from the air inlet to the air outlet. The noise reduction air duct is arranged on the lower cover, so that the silencer is miniaturized, the installation requirement is met, and air suction noise generated by the air compressor is reduced.

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 double-cylinder oil-free air compressor currently sets the muffler between the two cylinders. When the air compressor uses a small pump head, the existing muffler is cumbersome to assemble and has a poor muffler effect.

[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 is easy to install and has a good silencer effect.

[0006] The utility model adopts the following technical solution to solve the problems of the prior art: 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 to the pair of cylinder assemblies; the driving assembly reciprocates in the pair of cylinder assemblies to inhale external gas from the silencer, which is compressed and stored in the air storage tank; the silencer comprises an upper cover and a lower cover covering each other; the lower cover comprises an air inlet for external gas to enter, an air outlet for discharging the external gas entering the silencer to the cylinder assembly, and a noise reduction duct for guiding the external gas from the air inlet to the air outlet.

[0007] A further improved solution is: the air inlet is located at the front side of the lower cover, the lower cover includes an air inlet pipe extending from the air inlet to the rear end, and the air inlet pipe is located at the lower end of the lower cover.

[0008] A further improved solution is: the lower cover includes a first baffle plate close to the rear end wall, an air intake space is formed between the first baffle plate and the rear end wall of the lower cover, the air intake pipe extends through the first baffle plate, and the upper end of the first baffle plate abuts against the upper cover.

[0009] A further improvement is: the lower cover protrudes upward from the lower bottom wall to form a second baffle and a third baffle, the front end of the second baffle is connected to the third baffle, the second baffle is located at the front end of the first baffle, and the rear end of the second baffle is spaced apart from the left and right side walls of the lower cover.

[0010] A further improved solution is: the third baffle is located at the front end of the second baffle, the third baffle is connected between the left and right side walls of the lower cover, the air outlet is located at the front end of the third baffle, and the upper ends of the second baffle and the third baffle are abutted against the upper cover.

[0011] A further improved solution is: the first baffle, the second baffle and the third baffle are arranged to form a sponge cavity, and a sponge is arranged in the sponge cavity.

[0012] A further improvement scheme is: the rear end of the first baffle is spaced apart from the second baffle to form a guide port, and the external gas flows into the rear end of the lower cover from the air inlet pipe and then flows into the sponge cavity through the guide port; the third baffle is provided with a recess, and an air outlet space is formed between the third baffle and the front end wall of the lower cover, and the recess guides the external gas flowing into the sponge cavity to the air outlet space.

[0013] A further improvement scheme is: the noise reduction air duct includes a second path for external gas to flow from the air inlet through the air inlet pipe to the air inlet space, a second path for external gas to flow from the air inlet space to the sponge cavity through the guide port, a third path for external gas to flow from the sponge cavity to the air outlet space through the recess, and a fourth path for external gas to flow from the air outlet space to the cylinder assembly through the air outlet pipe.

[0014] A further improved solution is: the silencer device includes an air outlet pipe extending from the air outlet to the left and right sides, and the air outlet pipe is connected to a pair of cylinder assemblies.

[0015] A further improvement is as follows: in the up and down direction, the air outlet is located above the air inlet, and an annular protrusion is provided on the outer periphery of the air outlet pipe.

[0016] Compared with the prior art, the utility model has the following beneficial effects: the lower cover includes an air inlet for external air to enter, an air outlet for discharging the external air entering the silencer to the cylinder assembly, and a noise reduction air duct for guiding the external air from the air inlet to the air outlet; setting the noise reduction air duct on the lower cover can miniaturize the silencer, meet installation requirements, and reduce the intake noise generated by the air compressor. [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 schematic diagram of a first direction of a silencer device for an air compressor shown;

[0021] Figure 4 yes Figure 2 A schematic diagram of a second direction of the silencer of the air compressor shown;

[0022] Figure 5 yes Figure 2 A three-dimensional schematic diagram of the lower cover of the air compressor shown.

[0023] Meaning of the reference numerals in the figures:

[0024] Air compressor 100 Air tank 1

[0025] Cylinder assembly 2 Cylinder head 20

[0026] Cylinder 21 Muffler 3

[0027] Upper cover 30 Inverted 301

[0028] Card slot 302 Lower cover 31

[0029] Air inlet 311 Air inlet pipe 3110

[0030] Air outlet 312 Air outlet pipe 313

[0031] Protrusion 3130 Through hole 314

[0032] Connecting pipe 315 First baffle 316

[0033] Intake space 3160 Second baffle 317

[0034] Guide port 318 Third baffle 319

[0035] Notch 3190 Air outlet space 3191

[0036] Sponge cavity 32 Sponge 33

[0037] Capacitor box 4 Handle 5

[0038] Support seat 6 [Specific implementation method]

[0039] 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.

[0040] See also Figures 1 to 5 The utility model is shown as an air compressor 100, which includes a cylindrical gas tank 1, a motor assembly (not shown) fixed on the top of 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 device 4 fixed to the outer periphery of the gas tank 1, a handle 5 installed on the pair of cylinder assemblies 2 and a plurality of support seats 6 installed below the gas tank 1.

[0041] The motor assembly drives the driving assembly to reciprocate in a pair of the cylinder assemblies 2, and external gas is sucked in from the silencer 3 and stored in the gas tank 1 after being compressed; the handle 5 is located above the cylinder assembly 2, and the handle 5 is used for the operator to hold and lift the air compressor 100 and move it to different working places, which is convenient and quick; the support base 6 is fixedly connected to the lower part of the gas tank 1, and the support base 6 can place the air compressor 100 stably on the working plane.

[0042] 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 .

[0043] 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.

[0044] See also Figures 2 to 5 As shown, the silencer 3 includes an upper cover 30 and a lower cover 31 covering each other, and the silencer 3 includes an undercut 301 located at the rear end of the upper cover 30 and a slot 302 located at the rear end of the lower cover 31, and the undercut 301 and the slot 302 cooperate with each other to lock the upper cover 30 and the lower cover 31.

[0045] The lower cover 31 includes an air inlet 311 for external air to enter, an air outlet 312 for discharging the external air entering the silencer 3 to the cylinder assembly 2, and a noise reduction duct (not shown) for guiding the external air from the air inlet 311 to the air outlet 312.

[0046] Specifically, the air inlet 311 is located at the front end of the lower cover 31 , and the lower cover 31 includes an air inlet pipe 3110 extending from the air inlet 311 to the rear end, and the air inlet pipe 3110 is located at the lower end of the lower cover 31 .

[0047] Furthermore, the lower cover 31 includes a first baffle 316 close to the rear end wall, an air intake space 3160 is formed between the first baffle 316 and the rear end wall of the lower cover 31 , the air intake pipe 3110 extends through the first baffle 316 , and the upper end of the first baffle 316 abuts against the upper cover 30 .

[0048] The lower cover 31 protrudes upward from the lower end wall to form a second baffle 317 and a third baffle 318, the front end of the second baffle 317 is connected to the third baffle 319, the second baffle 317 is located at the front end of the first baffle 316, and the rear end of the second baffle 317 is spaced apart from the left and right side walls of the lower cover 31.

[0049] The third baffle 319 is located at the front end of the second baffle 317 , and the third baffle 319 is connected between the left and right side walls of the lower cover 31 . The air outlet 312 is located at the front end of the third baffle 319 , and the upper ends of the second baffle 317 and the third baffle 319 abut against the upper cover 30 .

[0050] Furthermore, the first baffle 316, the second baffle 317 and the third baffle 319 are arranged to form a sponge cavity 32, and a sponge 33 is arranged in the sponge cavity 32. The sponge 33 can reduce the noise generated when the external air flows through, and at the same time filter the impurities in the external air without reducing the air suction efficiency of the air compressor 100.

[0051] The rear end of the first baffle plate 316 is spaced from the second baffle plate 317 to form a guide port 318, and the external air flows from the air inlet pipe 3110 into the rear end of the lower cover 31 and then flows into the sponge cavity 32 through the guide port 318. The third baffle plate 319 is provided with a notch 3190, and an air outlet space 3191 is formed between the third baffle plate 319 and the front end wall of the lower cover 31, and the notch 3190 guides the external air flowing into the sponge cavity 32 to the air outlet space 3191.

[0052] The air outlet 312 is located above the air inlet 311, and a protrusion 3130 is provided on the outer periphery of the air outlet pipe 313. The protrusion 3130 allows the air outlet pipe 313 to be connected to the cylinder assembly 2 without adding a sealing ring for cooperation, thereby ensuring a good sealing effect between the two, reducing costs and facilitating installation.

[0053] Specifically, the noise reduction air duct includes a first path for external gas to flow from the air inlet 311 through the air inlet pipe 3110 to the air inlet space 3160, a second path for external gas to flow from the air inlet space 3160 through the guide port 318 to the sponge cavity 32, a third path for external gas to flow from the sponge cavity 32 through the recess 3190 to the air outlet space 3191, and a fourth path for external gas to flow from the air outlet space 3191 through the air outlet pipe 313 to the cylinder assembly 2.

[0054] When external gas flows through the second path, since the rear end of the second baffle plate 317 is separated from the left and right side walls of the lower cover 31, the external gas can flow back between the second baffle plate 317 and the left and right side walls of the lower cover 31, that is, the external gas first flows to the front end of the second baffle plate 317 and then flows to the rear end, which can extend the path of the external gas flowing through the silencer 3 and improve the noise reduction effect.

[0055] Furthermore, the left and right end walls of the lower cover 31 are provided with through holes 314, which are located at the rear end of the lower cover 31 and penetrate the left and right end walls of the lower cover 31. A connecting pipe 315 is placed in the through hole 314, and the connecting pipe 315 connects the silencer 3 to the cylinder assembly 2 more stably.

[0056] In this embodiment, the lower cover 31 includes an air inlet 311 for external air to enter, an air outlet 312 for discharging the external air entering the silencer 3 to the cylinder assembly 2, and a noise reduction air duct for guiding the external air from the air inlet 311 to the air outlet 312; setting a noise reduction air duct in the lower cover 31 can miniaturize the silencer 3, meet installation requirements, and reduce the intake noise generated by the air compressor 200.

[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 muffler connected to the pair of cylinder assemblies; the driving assembly reciprocates in the pair of cylinder assemblies to suck in external gas from the muffler, which is compressed and stored in the air storage tank; the muffler comprises an upper cover and a lower cover covering each other; characterized in that: The lower cover includes an air inlet for external air to enter, an air outlet for discharging the external air entering the muffler to the cylinder assembly, and a noise reduction duct for guiding the external air from the air inlet to the air outlet.

2. The air compressor according to claim 1, characterized in that: The air inlet is located at the front end of the lower cover, and the lower cover includes an air inlet pipe extending from the air inlet to the rear end, and the air inlet pipe is located at the lower end of the lower cover.

3. The air compressor according to claim 2, characterized in that: The lower cover comprises a first baffle plate close to the rear end wall, an air intake space is formed between the first baffle plate and the rear end wall of the lower cover, the air intake pipe extends through the first baffle plate, and the upper end of the first baffle plate abuts against the upper cover.

4. The air compressor according to claim 3, characterized in that: The lower cover protrudes upward from the lower end wall to form a second baffle and a third baffle, the front end of the second baffle is connected to the third baffle, the second baffle is located at the front end of the first baffle, and the rear end of the second baffle is spaced apart from the left and right side walls of the lower cover.

5. The air compressor according to claim 4, characterized in that: The third baffle is located at the front end of the second baffle, the third baffle is connected between the left and right side walls of the lower cover, the air outlet is located at the front end of the third baffle, and the upper ends of the second baffle and the third baffle are abutted against the upper cover.

6. The air compressor according to claim 5, characterized in that: The first baffle plate, the second baffle plate and the third baffle plate are arranged to form a sponge cavity, and a sponge is arranged in the sponge cavity.

7. The air compressor according to claim 6, characterized in that: The rear end of the first baffle is spaced from the second baffle to form a guide port, and the external air flows from the air inlet pipe into the rear end of the lower cover and then flows into the sponge cavity through the guide port; the third baffle is provided with a notch, and an air outlet space is formed between the third baffle and the front end wall of the lower cover, and the notch guides the external air flowing into the sponge cavity to the air outlet space.

8. The air compressor according to claim 7, characterized in that: The noise reduction air duct includes a first path for external gas to flow from the air inlet through the air inlet pipe to the air inlet space, a second path for external gas to flow from the air inlet space to the sponge cavity through the guide port, a third path for external gas to flow from the sponge cavity to the air outlet space through the recess, and a fourth path for external gas to flow from the air outlet space to the cylinder assembly through the air outlet.

9. The air compressor according to claim 1, characterized in that: The silencer device comprises an air outlet pipe extending from the air outlet to the left and right sides, and the air outlet pipe is connected to a pair of the cylinder assemblies.

10. The air compressor according to claim 9, characterized in that: In the up-down direction, the air outlet is located above the air inlet, and a protrusion is provided on the outer periphery of the air outlet pipe.

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