A compressor, which includes a cylinder block and a piston assembly arranged inside the cylinder block; the piston assembly includes a first piston, a second piston arranged inside the first piston, and a movable assembly connected to the first piston, and the movable assembly is configured to drive the first piston and the second piston to reciprocate; the cylinder block is provided with a first compression chamber that defines a space for the first piston to move up and down; the cylinder block is provided with a gas storage chamber for storing the gas after the first compression, and the gas storage chamber is connected to the first compression chamber; and the cylinder block is also provided with a second compression chamber that defines a space for the second piston to move up and down, and the second compression chamber is connected to the gas storage chamber.

CROSS REFERENCE TO RELEVANT APPLICATIONS

The present application claims priority to Chinese patent application No. 202010287697.0 filed with the Chinese National Intellectual Property Administration on Apr. 13, 2020, titled “NEW COMPRESSOR”, the entire content of which is incorporated into the present application by reference.

TECHNICAL FIELD

The present disclosure relates to the field of mechanical technology; in particular, the present disclosure relates to a compressor.

BACKGROUND

A compressor is a driven fluid machine which pressurizes a low-pressure gas into a high-pressure gas. It suctions in a low-temperature and low-pressure gas from the outside, drives a piston through operation of an electric motor so as to compress the gas, and discharges a high-temperature and high-pressure gas to a discharge pipe.

Traditional compressors are divided into single-cylinder compressors and multi-cylinder compressors, in each of which an electric motor is used to directly drive the compressor so that a crankshaft rotates and drives a connecting rod to make a piston reciprocate, thereby causing a change in the volume of the cylinder.

The single-cylinder compressor has a low compression efficiency and a poor compression capacity, and it is impossible for it to obtain a high-pressure gas through a single compression. The electric motor and the piston generate a large amount of heat during use and are prone to damage, which will reduce a service life of the compressor. The multi-cylinder compressor has a large volume, a complicated structure, and a high production cost; moreover, a failure rate is high during asynchronous compressions of multiple pistons, and the maintenance is difficult, which also further reduces the compression efficiency.

SUMMARY

In view of the above problems, an embodiment of the present disclosure is proposed to provide a compressor that overcomes or at least partially solves the above problems.

In order to solve the above problems, the embodiment of the present disclosure discloses a compressor, comprising a cylinder block and a piston assembly arranged inside the cylinder block;wherein the piston assembly comprises a first piston, a second piston arranged inside the first piston, and a movable assembly connected to the first piston, and the movable assembly is configured to drive the first piston and the second piston to reciprocate;the cylinder block is provided with a first compression chamber that defines a space for the first piston to move up and down, and when the first piston reciprocates in the first compression chamber, a gas outside the cylinder block is suctioned in, and the gas is compressed to generate a gas after first compression;the cylinder block is provided with a gas storage chamber for storing the gas after the first compression, and the gas storage chamber is connected to the first compression chamber; andthe cylinder block is further provided with a second compression chamber that defines a space for the second piston to move up and down, the second compression chamber is connected to the gas storage chamber, when the second piston reciprocates in the second compression chamber, the gas after the first compression is suctioned from the gas storage chamber, and the gas after the first compression is compressed to generate a gas after second compression.

Optionally, the cylinder block is provided with a penetrating spacer block, the spacer block extends from a top to a bottom of the cylinder block, a space between an outer wall of the spacer block and an inner wall of the cylinder block defines the first compression chamber, and an inner wall space of the spacer block defines the second compression chamber, to allow the first compression chamber and the second compression chamber both to be arranged inside the cylinder block, and to allow the second compression chamber to be surrounded by the first compression chamber.

Optionally, the first compression chamber is provided with a first gas inlet port and a first gas outlet port, the second compression chamber is provided with a second gas inlet port and a second gas outlet port, both the first gas inlet port and the second gas outlet port communicate with an outer wall of the cylinder block, and the first gas outlet port and the second gas inlet port communicate with the gas storage chamber.

Optionally, the first compression chamber is provided with a first opening and closing space, one end of the first gas inlet port communicates with the first opening and closing space, the first opening and closing space is provided with a first gas inlet valve, and an end where the gas storage chamber and the first gas outlet port are connected is provided with a first gas outlet valve; and wherein the second compression chamber is provided with a second opening and closing space, one end of the second gas inlet port and one end of the second gas outlet port communicate with the second opening and closing space, the second opening and closing space is provided with a second gas inlet valve, and the other end of the second gas inlet port is provided with a second gas outlet valve;when the first piston moves from a top dead center to a bottom dead center, the first gas inlet valve opens the first gas inlet port, and the first gas outlet valve seals the first gas outlet port;when the first piston moves from the bottom dead center to the top dead center, the first gas inlet valve seals the first gas inlet port, and the first gas outlet valve opens the first gas outlet port;when the second piston moves from a top dead center to a bottom dead center, the second gas inlet valve opens the second gas inlet port, and the second gas outlet valve seals the second gas outlet port; andwhen the second piston moves from the bottom dead center to the top dead center, the second gas inlet valve seals the second gas inlet port, and the second gas outlet valve opens the second gas outlet port.

Optionally, further comprising a filter component arranged at the first gas inlet port, and an elastic component which is connected to the second gas outlet valve by touching;when the first piston moves from the top dead center to the bottom dead center, the first gas inlet valve opens the first gas inlet port, and the gas outside the cylinder block enters the first compression chamber after being filtered by the filter component;when the second piston moves from the bottom dead center to the top dead center, the second gas outlet valve opens the second gas outlet port, and the second gas outlet valve compresses the elastic component under the action of the gas after the second compression; andwhen the second piston moves from the top dead center to the bottom dead center, the elastic component bounces the second gas outlet valve to an original position, to allow the second gas outlet valve to seal the second gas outlet port.

Optionally, further comprising a cylinder liner arranged on an inner wall of the cylinder block, a sealing ring is arranged at a position where the cylinder liner touches the inner wall of the cylinder block, and the cylinder block is provided with a spacer block;an outer wall of the spacer block is provided with a sealing piston for sealing the first compression chamber; andthe first piston is provided with at least one gas ring for sealing the first compression chamber, and/or an oil scraper ring for scraping grease.

Optionally, a bottom of the cylinder block is equipped with lubricating oil or grease;a side of the cylinder block is provided with a breathing hole for maintaining oil pressure balance at the bottom of the cylinder block;a side of the cylinder block is provided with an oil mirror for observing the volume of the lubricating oil at the bottom of the cylinder block; andthe bottom of the cylinder block is provided with an oil drain hole for draining the lubricating oil at the bottom of the cylinder block.

Optionally, the first piston is provided with a positioning seat, the second piston is arranged on the positioning seat, and the second piston is pushed by the positioning seat to move synchronously with the first piston; andthe positioning seat is provided with a leak hole for the lubricating oil at a bottom of the cylinder block to flow into the second piston.

Optionally, further comprising a heat dissipation component for dissipating heat, and a purification component for detecting and filtering the gas after the second compression;the heat dissipation component is arranged on an outer wall of the cylinder block;the purification component comprises a filter connected to the second compression chamber, and a tester connected to the filter; andthe tester is provided with a vent valve for discharging gas, an output connector for connecting with an external device, a pressure gauge for gas detection, and a safety valve.

Optionally, the movable assembly comprises a connecting rod connected to the first piston and the second piston, a crankshaft connected to the connecting rod, a gear connected to the crankshaft, and an electric motor connected to the gear, and wherein the crankshaft is provided with a crankshaft bearing, an oil seal and a gear bearing, the crankshaft bearing is connected to the oil seal, the crankshaft is connected to the gear through the crankshaft bearing and the gear bearing, the cylinder block is provided with a housing, and the electric motor is arranged in the housing.

The embodiment of the present disclosure has the following advantages: the present disclosure proposes a compressor, which may include a cylinder block and a piston assembly arranged inside the cylinder block. The cylinder block of the present disclosure is divided into a first compression chamber and a second compression chamber. Two times of compression can be realized in a single cylinder block. Moreover, a first piston and a second piston can move synchronously in the cylinder block, which can greatly reduce the volume, improve the compression efficiency, increase the compression capacity, and meet more compression requirements. Furthermore, through the transmission of gear, the amount of heat generated by the electric motor and the pistons during use can be reduced, which reduces work wear, while also being capable of prolonging the service life of the entire compressor and reducing the operating and use cost.

Described above is merely an overview of the inventive scheme. In order to more apparently understand the technical means of the disclosure to implement in accordance with the contents of specification, and to more readily understand above and other objectives, features and advantages of the disclosure, specific embodiments of the disclosure are provided hereinafter.

DETAILED DESCRIPTION

To make the above purposes, features and advantages of the present disclosure clearer and easily understood, the present disclosure will be described in further detail below in conjunction with the accompanying drawings and specific implementations.

One of the core ideas of the embodiment of the present disclosure is to provide two different compression chambers in a cylinder block, so that two times of compression are performed in the two different compression chambers, which enables the machine to have a small volume and the compressed gas to have a high pressure. In addition, a heat dissipation component is provided on the side of the cylinder block, which can effectively solve the problem of cooling the compressor and increase the service life of the entire compressor.

With reference toFIG.1, an isometric view of a first embodiment of a compressor of the present disclosure is shown. The compressor can perform two times of compression on the air.

Specifically, with reference toFIGS.1-4, the compressor may include a cylinder block1and a piston assembly2arranged in the cylinder block. The piston assembly2is surrounded by the cylinder block1and reciprocates in the cylinder block1to compress gas in the cylinder block1, thereby generating a compressed gas.

It should be noted that the cylinder block1may be made of a material which is resistant to high temperature and has a high hardness, such as an alloy, a plastic or an organic material. The cylinder block1may be a cube, a cylinder, or an irregularly-shape body. The volume of the cylinder block1may be adjusted according to actual needs. If a large volume of gas needs to be compressed, the volume of the cylinder block1can be appropriately increased, so that the volume of the gas in the cylinder block1can be increased. If a small volume of gas needs to be compressed, the volume of the cylinder block1can be appropriately reduced, so that the volume of the gas in the cylinder block1can be reduced.

With reference toFIG.2, a front view of the first embodiment of the compressor of the present disclosure is shown. In this embodiment, the compressor may also be provided with a purification component3, which may be connected to the cylinder block1and which may be configured to purify and filter the compressed gas discharged from the cylinder block1and to perform a pressure test.

With reference toFIG.2, in a specific implementation, the purification component3may include a filter31and a tester32that are connected to each other. The filter31may be connected to the cylinder block1; specifically, it may be connected to the cylinder block1through a connection pipe. The tester32may be provided with a vent valve33for discharging gas. A safety valve34for protecting the tester32, a pressure gauge35for testing the gas pressure, and an output connector36for connecting with an external device may be provided on the sides of the vent valve33. A pollutant discharge valve37is provided on the side of the filter31for discharging pollutants from the filter31.

Preferably, a filter material of the filter31may be composed of various different filter materials such as filter cotton and/or molecular sieve and/or activated carbon, etc. The use of various different filter materials can effectively improve the filtering effect. In actual use, the technician may make adjustments according to actual needs, to which the present disclosure does not impose any limitation. In addition, it should be noted that the vent valve33and the safety valve34may be adjusted according to the actual volume of the cylinder block1or the volume of the compressed gas or the pressure of the compressed gas, and the pressure gauge35may also be adjusted according to actual test requirements. The output connector may be specifically adjusted according to a connector of the external device.

In use, after the gas is compressed in the cylinder block1, the compressed gas can be discharged. The compressed gas may be filtered by the filter31and flow into the pressure gauge35for pressure test, and finally may be discharged from the vent valve33. If the compressed gas needs to be delivered to the external device, the output connector36may be connected to the external device, and then the compressed gas can be discharged.

Reference is made toFIGS.3to7, which respectively show a side view of the first embodiment of the compressor of the present disclosure, a rear view of the first embodiment of the compressor of the present disclosure, a top view of the first embodiment of the compressor of the present disclosure, a schematic structural view of a second gas outlet valve of the first embodiment of the compressor of the present disclosure, and a schematic view of compressing of the first embodiment of the compressor of the present disclosure. In this embodiment, the piston assembly2may include a piston21and a movable assembly22. The movable assembly22is connected to the piston21, and is configured to control the piston21to reciprocate in the cylinder block1. The piston21is configured to compress the gas in the cylinder block1.

With reference toFIGS.3to7, the movable assembly22may include a connecting rod23, a crankshaft24, an oil seal29, a crankshaft bearing28, a gear25, and an electric motor26, which are connected in sequence. The connecting rod23is connected to the piston21, a gear bearing27is provided on the crankshaft24, the crankshaft24is connected to the gear25through the gear bearing27and the crankshaft bearing28, and the gear25is directly connected to the electric motor26. The oil seal29is connected to the crankshaft bearing28, and the oil seal29may be an element coated with lubricating oil for playing the roles of lubrication, auxiliary cooling, anti-rust, cleaning, sealing, buffering and the like during use of the crankshaft24and the gear25. During operation, the electric motor26drives the gear25to rotate, then the gear25drives the crankshaft24to rotate, and then the crankshaft24drives the connecting rod23to rotate, so that the connecting rod23can drive the piston to reciprocate in the cylinder block1.

In one of the optional embodiments, a housing11may be provided on the side of the cylinder block1, and the electric motor26may be fixedly arranged in the housing so that the electric motor26can be protected to avoid damage of the electric motor26. It should be noted that the housing11may be made of a material such as metal or alloy or high-temperature resistant organic material, etc. Preferably, the housing may be a protective sheet metal. In one of the optional embodiments, the housing11may also be provided with a handle111, which may be configured for the user or technician to lift the entire compressor, so as to facilitate the technician in carrying the compressor.

In addition, it should be noted that the electric motor26may be a high-power motor, or a high-speed motor, or a high-torque motor. The type of the electric motor26may be adjusted according to actual needs. Specifically, by setting a gear ratio, for example, by adjusting the gear ratio of the gear25, a high-speed electric motor can be converted into a high-torque and low-speed motor, so that the electric motor26can drive the crankshaft24to move back and forth, thereby reducing the amount of heat generated by the cylinder block1. In addition, the electric motor26may be an electric motor having a voltage of 12V, 24V, 110V, 220V or another voltage, to which the present disclosure does not impose any limitation.

With reference toFIGS.3to7, a heat dissipation component12may be provided on the side of the cylinder block1. Specifically, the heat dissipation component12may be provided on an outer wall of the cylinder block1and is connected to the outer wall of the cylinder block1by touching. The heat dissipation component12may be configured to dissipate heat from the space inside the cylinder block1and stabilize the temperature of the cylinder block1. If the compressor is overheated during use, the piston or various mechanical parts in the cylinder block1will be prone to damage. With the use of the heat dissipation component12, the temperature of the cylinder block1can be appropriately lowered, damage to various mechanical parts can be avoided, and the service life of the product can be prolonged. At the same time, the technician will be facilitated in carrying or moving the entire compressor after heat dissipation. In a specific implementation, the heat dissipation component12may be a heat dissipation fan.

Reference is made toFIGS.6to7, which respectively show a schematic structural view of a second gas outlet valve of the first embodiment of the compressor of the present disclosure, and a schematic view of compressing of the first embodiment of the compressor of the present disclosure. Further reference is made toFIGS.8to11, which respectively show a schematic view of a compressed gas valve of the first embodiment of the compressor of the present disclosure, a schematic view of suctioning of the first embodiment of the compressor of the present disclosure, a schematic view of a suctioned gas valve of the first embodiment of the compressor of the present disclosure, and a schematic structural view of the second gas outlet valve of the first embodiment of the compressor of the present disclosure.

In this embodiment, the piston21includes a first piston211and a second piston212. The second piston212is arranged inside the first piston211. The first piston211may be connected to the connecting rod23and controlled by the connecting rod23so as to reciprocate inside the cylinder block1. The crankshaft24and the gear25are arranged at a bottom of the cylinder block1so that the connecting rod23is pushed from the bottom, and then the connecting rod23drives the first piston211and the second piston212to reciprocate up and down.

In a specific implementation, a positioning seat213may be provided in the first piston211, and a size of the positioning seat213may be matched with a size of the second piston212so that the second piston212may be arranged in the middle of the positioning seat213. By providing the positioning seat213, a support can be provided for the upward movement of the second piston212. When the entire compressor needs to be cleaned and arranged, the disassembly and assembly also become more convenient. Moreover, the positioning seat213enables the second piston212to move synchronously with the first piston211. When the connecting rod23pulls the first piston211from a top dead center to a bottom dead center, the second piston212also moves downward at the same time under the action of gravity, and also moves from a top dead center to a bottom dead center; and when the connecting rod23pushes the first piston211from the bottom dead center to the top dead center, the second piston212also moves from the bottom dead center to the top dead center at the same time due to being pushed by the positioning seat213. The positioning seat213not only can ensure the synchronous movement of the first piston211and the second piston212, but also can reduce the load of the electric motor and reduce the use loss of mechanical parts.

In one of the optional embodiments, one or more leak holes214may be provided around a periphery of the positioning seat213, and the leak holes214can allow the lubricating oil at the bottom of the cylinder block1to flow to a periphery of the second piston212so as to lubricate the second piston212, which not only can reduce friction of the second piston212and lower the temperature of the second piston212during the working process, but also can improve the working efficiency and service life of the second piston212.

In this embodiment, an interior of the cylinder block1may have a shape of a cylinder, and a penetrating spacer block13is provided inside the cylinder block1. The spacer block13has a cylindrical shape and may extend from the top to the bottom of the cylinder block1. As can be seen fromFIGS.6to11, a space between an outer wall of the spacer block13and an inner wall of the cylinder block1is a first compression chamber4. The first compression chamber4can define a space for the reciprocating movement of the first piston211. The piston211can compress gas in the first compression chamber4. In one of the optional embodiments, a height of the first compression chamber4may be larger than or equal to a stroke distance from the top dead center to the bottom dead center of the first piston211. The top dead center is a position where a top of the first piston211has a maximum distance from a center of the crankshaft24, and the bottom dead center is a position where the top of the first piston211has a minimum distance from the center of the crankshaft24. Preferably, the height of the first compression chamber4may be equal to the stroke distance from the top dead center to the bottom dead center of the first piston211, so that the first piston211can fully compress the gas in the first compression chamber4, thereby improving the compression efficiency.

The spacer block13can divide the interior of the cylinder block1into two chambers for compression by two pistons, thereby reducing the volume of the entire cylinder block and improving the compression efficiency.

In a specific implementation, the shape of the first piston211can match with the space in the first compression chamber4, which not only enables the first piston211to move more flexibly in the first compression chamber4, but also can increase the compression efficiency.

As can be seen fromFIGS.6to11, a cylinder liner14is arranged on the inner wall of the cylinder block1, and the cylinder liner14can be connected to the inner wall of the cylinder block1by touching. The arrangement of the cylinder liner14can prevent the first piston211from directly contacting the inner wall of the cylinder block1during the reciprocating movement, and can prolong the service life of the cylinder block1and the first piston211. Optionally, the cylinder liner14may be made of a metal material, a plastic or an organic material, etc.

In actual operation, in order to make the cylinder liner14abut with the cylinder block1, a sealing ring141may be provided on the cylinder liner14, and the sealing ring141may be arranged in an area where the cylinder liner14and the cylinder block1are connected by touching. The sealing ring141can make the cylinder liner14and the inner wall of the cylinder block1be sealed more firmly.

With reference toFIGS.6to11, the first compression chamber4is provided with a first gas inlet port41and a first gas outlet port42, and the first gas inlet port41may pass through the outer wall of the cylinder block1, so that the first compression chamber4can communicate with the outer wall of the cylinder block1. Therefore, the gas around the outer wall of the cylinder block1can enter the first compression chamber4through the first gas inlet port41and be compressed in the first compression chamber4.

Optionally, in an area where the first compression chamber4communicates with the first gas inlet port41, the first compression chamber4is provided with a first opening and closing space43, so that an end of the first gas inlet port41can communicate with the first opening and closing space43. A first gas inlet valve44is provided in the first opening and closing space43. The first gas inlet valve44may be configured to close or open the first gas inlet port41. Specifically, with reference toFIGS.6to9, when the first piston211moves from the top dead center to the bottom dead center, the pressure outside the cylinder block1is higher than the pressure in the first compression chamber4, and the gas flows from the outside of the cylinder block1to the first compression chamber4to push the first gas inlet valve44away from the first gas inlet port41so that the first gas inlet port41is open, and gas can enter the first compression chamber4from the outside of the cylinder block1. When the first piston211moves from the bottom dead center to the top dead center, the gas in the first compression chamber4is compressed, so that the pressure in the first compression chamber4is higher than the gas pressure outside the cylinder block1. The first gas inlet valve44is pressed toward the first gas inlet port41under the action of the gas pressure, so that the first gas inlet port41is sealed, and at the same time, the first piston211discharges the compressed gas in the first compression chamber4from the first gas outlet port42.

In one of the preferred embodiments, the first gas inlet port41may be provided with a filter component45, and the filter component45may be a filter cartridge. The filter cartridge may be configured to filter the gas entering the first compression chamber4for one time, which can make the compressed air cleaner, and meanwhile can prevent impurities and dust from entering the interior of the cylinder block1and affecting the movement of the first piston211.

With reference toFIGS.6to11, in this embodiment, the cylinder block1is provided with a gas storage chamber5, and the gas storage chamber5communicates with the first gas outlet port42of the first compression chamber4, so that the gas discharged from the first compression chamber4may be temporarily stored in the gas storage chamber5. The gas storage chamber5may be arranged at the top of the cylinder block1, and may be specifically arranged according to the position of the first gas outlet port42. It should be noted that the capacity of the gas storage chamber5may be larger than or equal to or smaller than the volume of the compressed gas in the first compression chamber4, so that the gas compressed in the first compression chamber4can be completely stored in the gas storage chamber5.

In actual operation, since the first piston211reciprocates repeatedly, the compressed gas will be generated without stop. In order to prevent the gas generated from the previous compression and the gas generated from the next compression from being accumulated in the gas storage chamber5, a first gas outlet valve46may be provided at a position where the first gas outlet port42is connected to the gas storage chamber5, and the first gas outlet valve46may be provided inside the gas storage chamber5.

In actual operation, when the first piston211moves from the top dead center to the bottom dead center in the first compression chamber4, the gas in the first compression chamber4that was compressed by the first piston211at the last time is already stored in the gas storage chamber5, so the pressure in the gas storage chamber5is higher than the pressure in the first compression chamber4, and therefore the first gas outlet valve46can seal the first gas outlet port42; and when the first piston211moves from the bottom dead center to the top dead center in the first compression chamber4, the gas stored in the chamber5after the first compression is discharged, and the gas pressure in the first compression chamber4gradually increases, so the pressure in the first compression chamber4is higher than the pressure in the gas storage chamber5. Therefore, the gas in the compression chamber4pushes the first gas outlet valve46away, and the first gas outlet valve46opens the first gas outlet port42, so that the gas in the first compression chamber4can enter the gas storage chamber5. The above process is repeated in such a way.

In this embodiment, the use of the gas storage chamber5, the first gas inlet valve44and the first gas outlet valve46enable the entire compressor to achieve the process of natural suction and compression of gas, which can improve the compression efficiency; at the same time, the compressed gas in the first compression chamber4will not mix with the gas in the gas storage chamber5.

With reference toFIGS.6to11, in a preferred embodiment of the present disclosure, the second piston212can reciprocate at a position defined in the middle of the spacer block13. A space defined by the inner wall of the spacer block13is a second compression chamber6. The second compression chamber6can limit the reciprocating movement of the second piston212. Optionally, the spacer block13may extend downward from a side of the top of the cylinder block1or extend downward from any position of the top of the cylinder block1. In this embodiment, the spacer block13may extend downward from the center of the top of the cylinder block1, so that the first compression chamber4formed by the outer wall of the spacer block13and the inner wall of the cylinder block1can surround the space (i.e., the second compression chamber6) formed by the inner wall of the spacer block13.

Specifically, with reference toFIGS.6to11, a second gas inlet port61and a second gas outlet port62are provided in the second compression chamber6. The second gas inlet port61may communicate with the gas storage chamber5, and the second gas outlet port62may communicate with the outer wall of the cylinder block1, so that the gas in the gas storage chamber5after the first compression can enter the second compression chamber6from the second gas inlet port61, and be compressed for the second time in the second compression chamber6to obtain a gas after the second compression, which is finally discharged from the second gas outlet port62. In actual operation, the second gas outlet port62may be connected to the filter31through a pipe.

In order to prevent the gas in the second compression chamber6from mixing with the gas in the gas storage chamber5, and to prevent the gas in the gas storage chamber5from mixing with the gas after the second compression, the second compression chamber6is provided with a second opening and closing space63. One end of the second gas inlet port61communicates with the second opening and closing space63, and the other end of the second gas inlet port61communicates with the gas storage chamber5. One end of the second gas outlet port62communicates with the second opening and closing space63, and the other end of the second gas outlet port62communicates with the outer wall of the cylinder block1. A second gas inlet valve64is provided in the second opening and closing space63, and the second gas inlet valve64is configured to seal or open the second gas inlet port61. A second through hole67is provided in the second gas inlet valve64, and the second through hole67can match with the second gas outlet port62.

In addition, in order to avoid leakage of gas pressure in the second compression chamber6, a second gas outlet valve65is provided at an end where the second gas outlet port62and the second opening and closing space63are connected. The second gas outlet valve65may be configured to open or seal the second gas outlet port62. An elastic component66is provided on the side of the second gas outlet valve65. The elastic component66may be connected to the second gas outlet valve65by touching, and the elastic component66may be configured to reset the second gas outlet valve65.

With reference toFIGS.6to11, during use, when the connecting rod23pulls the first piston211to move downward, the second piston212also moves from the top dead center to the bottom dead center under the action of its own gravity. The pressure in the second compression chamber6is lower than the pressure in the gas storage chamber5. The gas after the first compression stored in the gas storage chamber5, which was compressed by the first piston211in the first compression chamber4, pushes the second gas inlet valve64away, so that the second gas inlet valve64can open the second gas inlet port61. The gas after the first compression enters the second compression chamber6. When the second piston212moves from the bottom dead center to the top dead center, the gas after the first compression is compressed for the second time in the second compression chamber6, and the pressure in the second compression chamber6is higher than the pressure in the gas storage chamber5, so that the gas in the second compression chamber6pushes the second gas inlet valve64toward the second gas inlet port61. The second gas inlet valve64seals the second gas inlet port61. At the same time, the pressure of the gas compressed for the second time by the second piston212is higher than the pressure of the gas outside the cylinder block1, and the gas after the second compression is discharged from the second gas outlet port62, thereby pushing the second gas outlet valve65away and causing the second gas outlet valve65to compress the elastic component66. After the gas after the second compression in the second compression chamber6is discharged, the elastic component66resets the second gas outlet valve65under the action of elastic force.

In this embodiment, the gas after the first compression stored in the gas storage chamber5is suctioned into the second compression chamber6, and is compressed for the second time by the second piston212in the second compression chamber6, so that multiple times of compression of gas are achieved, the efficiency of gas compression is improved, and the gas compression ratio is increased. Moreover, the second gas inlet valve64and the second gas outlet valve65can prevent the gas after the second compression in the second compression chamber6from mixing with the gas after the first compression stored in the gas storage chamber5, so that the gas after the first compression can be isolated from the gas after the second compression.

With reference toFIGS.6to11, in this embodiment, the first piston211and the second piston212can perform the compression synchronously, which can improve the compression efficiency, reduce the power consumption of the electric motor26, and reduce the loss of mechanical parts.

At the beginning of the operation, there can be no gas in each of the first compression chamber4, the gas storage chamber5and the second compression chamber6. The connecting rod23pulls the first piston211and the second piston212to move from the top dead centers to the bottom dead centers at the same time, and the gas outside the cylinder block1enters the first compression chamber4. The gas storage chamber5does not have the high-pressure gas after the compression in the first compression chamber4, and there is no gas after the first compression entering the second compression chamber6. Then, the connecting rod23pushes the first piston211and the second piston212to move from the bottom dead centers to the top dead centers at the same time. The first piston211compresses the gas in the first compression chamber4for the first time to obtain the gas after the first compression. The gas after the first compression is compressed into the gas storage chamber5. Since the second compression chamber6does not have the gas after the compression in the first compression chamber4, no gas will be discharged from the second compression chamber6; then, the connecting rod23pulls the first piston211and the second piston212to move from the top dead centers to the bottom dead centers at the same time, the gas outside the cylinder block1enters the first compression chamber4again, and at the same time, the gas after the first compression stored in the gas storage chamber5enters the second compression chamber6; then, the connecting rod23pushes the first piston211and the second piston212to move from the bottom dead centers to the top dead centers at the same time, and the first piston211once again compresses the gas in the first compression chamber4into the gas storage chamber5, whereas the second piston212compresses the gas in the second compression chamber6for the second time to obtain the gas after the second compression, and the gas after the second compression is discharged. This process in repeated in this way. Through the above operations, the gas outside the cylinder block1can be compressed for two times.

In a specific implementation, since the first piston211and the second piston212need to continuously operate at a high speed, in order to improve the efficiency of the operation of various components and reduce the risk of damage, a certain volume of lubricating oil or grease may be provided at the bottom of the cylinder block1. When the first piston211and the second piston212are working, the lubricating oil or lubricant at the bottom of the cylinder block1can reduce friction, protect various components, and meanwhile can also play the roles of lubrication, auxiliary cooling, anti-rust, cleaning, sealing, buffering and the like.

With reference toFIGS.6to11, the side of the cylinder block1may be provided with a breathing hole15for maintaining the oil pressure balance at the bottom of the cylinder block1. The side of the cylinder block1may be provided with an oil mirror16for observing the volume of the lubricating oil at the bottom of the cylinder block1. The bottom of the cylinder block1may be provided with an oil drain hole17for draining the lubricating oil at the bottom of the cylinder block1.

It should be noted that the breathing hole is a through hole, the breathing hole may extend outward from the cylinder block1, and the position and size of the breathing hole may be adjusted according to actual needs. The oil mirror may be a transparent glass or lens. The user can directly observe the volume of the lubricating oil at the bottom of the cylinder block1through the oil mirror. In actual operation, a dividing ruler or scale may be set in the oil mirror so that the volume of the lubricating oil can be known more accurately. In addition, the oil drain hole may be blocked by an oil plug. When the volume of the lubricating oil needs to be adjusted, the user may remove the oil plug and add or reduce the lubricating oil.

With reference toFIGS.6to11, it can be known that in another embodiment, the connecting rod23or the crankshaft24or the first piston211or the second piston212may splash the lubricating oil at the bottom of the cylinder block1into the first compression chamber4or the first compression chamber6. A sealing piston131may be provided on the outer wall of the spacer block13. The sealing piston may be configured to seal the first compression chamber4while also preventing the gas in the first compression chamber4from arriving at the bottom of the cylinder block1from the first compression chamber4and being drained from the hole15for maintaining the oil pressure balance. At the same time, the sealing piston may prevent excessive lubricating oil from entering the compression chamber4. In addition, on the edge where the first piston211is in contact with the cylinder liner14, at least one gas ring18that can seal the first compression chamber4may be provided in the first piston211, so that gas can be prevented from flowing away from the sides of the first piston211and the cylinder liner14. In addition, optionally, an oil scraper ring19is provided on the first piston211. The oil scraper ring can scrape away the lubricating oil remaining on the cylinder liner14, which then flows from the cylinder liner14to the bottom of the cylinder block1, so that the lubricating oil can be recycled.

In another optional embodiment, it is also possible for the first piston211to be not provided with the gas ring18and the oil scraper ring19; rather, the first compression chamber4may be sealed and the oil in the first compression chamber4may be scraped by using the first piston211alone.

In a specific implementation, the manufacturing precision of the first piston211and the first compression chamber4may be increased during the design and production, so that the first piston211may abut with the inner wall of the first compression chamber4as much as possible. For example, a diameter of an inner ring of the first compression chamber4is 50 mm, and a diameter of the first piston211is 49.99 mm, so that there is a gap of 0.01 mm between the first piston211and the first compression chamber4, thus making it possible to make the first piston211and the inner wall of the first compression chamber4be in a nearly completely abutting state. In use, since the first piston211moves at a high speed and it almost abuts with the inner wall of the first compression chamber4, the first piston211can scrape away the lubricating oil on the inner wall of the first compression chamber4, and since the first piston211and the first compression chamber4almost completely abut with each other, the air at the bottom cannot enter the first compression chamber4, so that the first piston211can seal the first compression chamber4.

The present disclosure provides a compressor, which may include a cylinder block and a piston assembly arranged inside the cylinder block. The compressor provided by the present disclosure has a simple structure and is convenient to use. A spacer block is provided in the cylinder block, and the interior of the cylinder block can be divided into two compression chambers, so that two times of compression can be realized in one cylinder block. Moreover, the volume of the cylinder block can be reduced, and the production cost can be reduced. In use, the first piston and the second piston can perform a compression movement synchronously in the cylinder block, which can greatly improve the compression efficiency, increase the compression capacity, and meet more compression requirements. Furthermore, the electric motor and the pistons can be cooled during use, which can reduce work wear, while also being capable of prolonging the service life of the entire compressor and reducing the operating and use cost.

The embodiments in this specification are described progressively, the differences from other embodiments are emphatically stated in each embodiment, and the similarities of these embodiments may be cross-referenced.

Although the preferred embodiments of the embodiments of the present disclosure have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present invention.

Finally, it should be noted that relational terms such as “first” and “second” in this specification are merely used to distinguish one entity or operation from the other one, and do not definitely indicate or imply that these entities or operations have any actual relations or sequences. In addition, the term “comprise” or “include” or other variations are intended to refer to non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only comprises these elements listed, but also comprises other elements that are not clearly listed, or inherent elements of the process, method, article or device. Unless otherwise clearly specified, an element defined by the expression “comprise a” shall not exclusive of other identical elements in a process, method, article or device comprising said element.

The compressor provided by the present disclosure are introduced in detail above, specific examples are used in this specification to expound the principle and implementation of the present disclosure, and the description of the above embodiments is merely used to assist those skilled in the art in understanding the method and core concept thereof of the present disclosure. In addition, those ordinarily skilled in the art can make changes to the specific implementation and invention scope based on the concept of the present disclosure. So, the contents of the specification should not be construed as limitations of the present disclosure.