Cylinder cooling structure of linear compressor

Abstract

The invention belongs to the technical field of compressor accessories, and discloses an air cylinder cooling structure of a linear compressor. The air cylinder cooling structure of the linear compressor comprises an air cylinder, the outer side of the air cylinder is sleeved with a heat exchange sleeve, the heat exchange sleeve wraps the bottom and the side wall of the air cylinder, a plurality of cooling liquid channels are formed in the heat exchange sleeve, and connecting bases are fixedly connected to the positions, corresponding to the cooling liquid channels, of the bottom of the heat exchange sleeve. According to the air cylinder cooling structure of the linear compressor, by means of the design of the heat exchange sleeve and the cooling liquid channel, external cooling liquid can be connected to dissipate heat of the air cylinder, heat generated in the working process of the air cylinder can be evenly absorbed, heat accumulation is reduced, and gaseous cooling liquid in the cooling liquid channel can be discharged through the design of the exhaust mechanism; the dryness of the cooling liquid is kept at a lower level, the situation that the cooling effect is affected by the too high dryness of the cooling liquid at the back section of circulation in the traditional technology is avoided, the structure is simple, the cooling efficiency is high, and the problems in the background technology are solved.

Description

Technical Field

[0001] This invention relates to the technical field of compressor components, specifically to a cylinder cooling structure for a linear compressor. Background Technology

[0002] A linear compressor is a device that compresses gas by having a piston reciprocate along a linear trajectory. It relies on a linear motor to directly drive the piston to perform reciprocating linear motion. By alternately opening and closing the intake and exhaust valves, unidirectional gas flow is formed to complete gas compression. It eliminates the crank and connecting rod mechanisms in traditional compressors that convert rotary motion into linear motion, thus having advantages such as simple structure, high transmission efficiency, and low noise.

[0003] During the operation of a linear compressor, in addition to the heat generated by the motor, the cylinder also generates a large amount of heat, mainly from the thermodynamic effects of the gas compression process, the frictional losses of mechanical motion, and the heat transferred by the motor. Once the heat dissipation fails, it will directly lead to performance degradation, component damage, or even complete machine failure. Therefore, in order to maintain the normal operating temperature of the cylinder and ensure the operating efficiency and reliability of the compressor, it is crucial to continuously optimize the cylinder cooling structure. Hence, we propose a cylinder cooling structure for a linear compressor. Summary of the Invention

[0004] The purpose of this invention is to provide a cylinder cooling structure for a linear compressor, which solves the problems mentioned in the prior art.

[0005] The objective of this invention is achieved as follows: a cylinder cooling structure for a linear compressor includes a cylinder, a heat exchange sleeve is fitted around the outside of the cylinder, the heat exchange sleeve covers the bottom and sidewalls of the cylinder, a plurality of coolant channels are provided on the heat exchange sleeve, a connecting seat is fixedly connected to the bottom of the heat exchange sleeve corresponding to the position of each coolant channel, an inlet pipe and an outlet pipe are respectively provided at both ends of the connecting seat, and the inlet pipe and the outlet pipe pass through the connecting seat and communicate with the two ends of the corresponding coolant channel, so that coolant is introduced into the coolant channel to dissipate heat from the cylinder.

[0006] An exhaust mechanism is provided on the side wall of the cylinder, above the heat exchange jacket, to remove gaseous coolant from the coolant passage and reduce the dryness of the coolant.

[0007] Preferably, there are at least four coolant channels, and the four coolant channels are arranged in a ring with reference to the cylinder axis, and the coolant channels are in a continuous S-shape.

[0008] Preferably, the exhaust mechanism includes a mounting ring, telescopic tubes, a magnetic ring, a limiting ring, a limiting spring, an air collecting chamber, a connecting channel, a sealing ring, a separator, a liquid-absorbing sponge, a vent hole, a pressure plate, a through hole, and a compression spring. An air collecting chamber is provided on the upper side of each coolant channel on the heat exchange sleeve. The bottom of the air collecting chamber communicates with the coolant channel through the connecting channel. The mounting ring is fixedly connected to the side wall of the cylinder and is located on the upper side of the heat exchange sleeve. Several telescopic tubes are inserted through the mounting ring and are opposite to each air collecting chamber. A limiting ring is fixedly connected to the outer wall of the telescopic tube and is located on the upper side of the mounting ring. A limiting spring is fitted onto the tube, and both ends of the limiting spring are connected to a limiting ring and a mounting ring, respectively. Each telescopic tube is connected by a magnetic ring, with the magnetic ring positioned above the limiting ring. The bottom end of the telescopic tube is inserted into the gas collecting chamber through an opening at the top of the gas collecting chamber, and a sealing ring is fixedly connected to the telescopic tube and slidably connected within the gas collecting chamber. A partition net is fixedly connected to the bottom of the gas collecting chamber, and a pressure plate is movably connected to the upper surface of the partition net via a compression spring. An absorbent sponge is positioned between the pressure plate and the partition net, and several vertically penetrating vent holes are opened on the absorbent sponge. A through hole is opened on the pressure plate at the position corresponding to the vent holes.

[0009] Preferably, the exhaust mechanism further includes a gas collecting ring, which is fixedly connected to the top of the cylinder side wall. The top of the telescopic tube passes through the bottom wall of the gas collecting ring and communicates with its inner cavity. An exhaust pipe is fixedly connected to one side of the gas collecting ring for the discharge of gaseous coolant.

[0010] Preferably, the telescopic tubes are arranged in a ring with reference to the axis of the heat exchange jacket.

[0011] Preferably, the outer wall of the heat exchange jacket is fixedly connected to a protective shell at the position of the coolant channel to cover the gas collection chamber and the coolant channel.

[0012] Preferably, the gas collection chamber is connected to the tail section of the coolant channel via a connecting channel.

[0013] Preferably, a rubber plug is fixedly connected to the upper surface of the pressure plate at the position corresponding to the telescopic tube, and the rubber plug can be inserted into the bottom of the telescopic tube to seal it when the telescopic tube moves down.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. The cylinder cooling structure of this linear compressor, through the design of a heat exchange jacket and coolant channels, can connect external coolant to dissipate heat from the cylinder, uniformly absorb the heat generated during cylinder operation, reduce heat accumulation, and utilize the exhaust mechanism to expel gaseous coolant from the tail end of the coolant channel, maintaining the coolant dryness at a low level. This avoids the situation in traditional technologies where the coolant dryness in the later stage of circulation is too high, affecting the heat dissipation effect. The structure is simple, the heat dissipation efficiency is high, and the problems mentioned in the background technology are solved.

[0016] 2. The cylinder cooling structure of the linear compressor is driven by the magnetic coil of the linear compressor itself. The piston cylinder structure formed by the gas collecting chamber and the sealing ring completes the gas-liquid separation of the coolant and the discharge of the gaseous coolant during the reciprocating motion of the telescopic tube. The structure is ingeniously designed and solves the problems mentioned in the background technology. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention.

[0019] Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle.

[0020] Figure 3 This is a schematic diagram of the coolant channel structure of the present invention.

[0021] Figure 4 For the present invention Figure 3 Enlarged view of point B in the middle.

[0022] Figure 5 This is a schematic diagram of the exhaust mechanism of the present invention.

[0023] Figure 6 This is a cross-sectional view of the exhaust mechanism of the present invention.

[0024] Figure 7 This is a schematic diagram of the connector of the present invention.

[0025] Figure 8 This is a schematic diagram of the structure of the liquid-absorbing sponge of the present invention.

[0026] Figure 9 This is a cross-sectional view of the bottom of the heat exchanger jacket of the present invention.

[0027] In the diagram: 1. Cylinder; 2. Heat exchanger jacket; 3. Coolant passage; 4. Connecting seat; 5. Inlet pipe; 6. Outlet pipe; 7. Exhaust mechanism; 71. Mounting ring; 72. Telescopic pipe; 73. Magnetic ring; 74. Limiting ring; 75. Limiting spring; 76. Gas collecting chamber; 77. Connecting channel; 78. Sealing ring; 79. Separator mesh; 710. Liquid-absorbing sponge; 711. Vent hole; 712. Pressure plate; 713. Through hole; 714. Compression spring; 715. Gas collecting ring; 716. Exhaust pipe; 8. Protective shell; 9. Rubber plug. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] like Figure 1-9As shown, the present invention provides a technical solution: a cylinder cooling structure for a linear compressor, including a cylinder 1, with a heat exchange sleeve 2 fitted onto the outer side of the cylinder 1. The heat exchange sleeve 2 is made of copper with a thermal conductivity of not less than 400 W / (m·K). The excellent thermal conductivity of copper can quickly conduct heat from the surface of the cylinder 1 to itself, providing a good thermal conduction basis for subsequent coolant heat exchange. At the same time, the inner wall of the heat exchange sleeve 2 is tightly fitted to the outer wall of the cylinder 1, and the roughness of the fitting surface is controlled at Ra0.Below 8, initial fixation is achieved through an interference fit to ensure no significant thermal resistance gap during heat transfer. The heat exchange jacket 2 forms a wrapping structure around the bottom and side walls of the cylinder 1, covering the main heat-generating area of ​​the cylinder 1 during operation. This area is the main stroke section of the piston reciprocating motion, where the heat generated by gas compression is concentrated. The fully wrapped structure maximizes the heat exchange contact area and improves heat exchange efficiency. Several coolant channels 3 are provided on the heat exchange jacket 2. Based on known technology, the coolant channels 3 are coated with a hydrophilic micro / nano structure composite coating. The coating, through the synergistic effect of low surface energy modification and microporous / rough structure, allows the coolant (such as ethylene glycol aqueous solution, refrigerant) to flow through the channels. The contact angle of the inner wall of the coolant channel is <30° (superhydrophilic state). The originally easily formed "stream-like" or "droplet-like" flow is transformed into a uniform thin liquid film covering the entire inner wall, increasing the diffusion area by more than 50%. At the same time, the microscopic protrusions and pores can serve as "diffusion guiding channels" for the coolant, eliminating flow dead zones. Without further explanation, there are no fewer than four coolant channels 3, and the four coolant channels 3 are arranged in a ring around the axis of cylinder 1 to ensure that the heat dissipation effect of each channel on cylinder 1 is balanced, preventing thermal stress deformation caused by excessive circumferential temperature gradient of cylinder 1. In this embodiment, four coolant channels 3 are preferably provided. The uniform ring distribution of the four channels ensures uniform heating of cylinder 1 around the circumference, avoiding localized areas of heat loss due to heat loss. In cases of insufficient heat dissipation leading to overheating, the coolant channel 3 is a continuous S-shape. This continuous S-shape maximizes the coolant flow path length within the limited internal space of the heat exchange jacket 2, extending the heat exchange time between the coolant and the heat exchange jacket 2. A connecting seat 4 is fixedly connected to the bottom of the heat exchange jacket 2 at the corresponding positions of each coolant channel 3. Each end of the connecting seat 4 is equipped with an inlet pipe 5 and an outlet pipe 6, both made of corrosion-resistant stainless steel. The inlet end of the inlet pipe 5 is equipped with a filter connector to filter impurities in the coolant, preventing them from entering the coolant channel 3 and causing blockages that would affect heat dissipation circulation. This is well-known technology and will not be elaborated further. The connecting seat 4 is made of corrosion-resistant stainless steel. Made of steel, specifically 316L stainless steel, this material possesses excellent resistance to acid and alkali corrosion and high temperature resistance, enabling it to withstand long-term corrosion from different types of coolants. It also boasts high mechanical strength, ensuring the structural stability of the connecting seat 4 during long-term use. It is detachably fixed to the bottom of the heat exchange jacket 2 via bolts. Both the inlet pipe 5 and the outlet pipe 6 pass through the connecting seat 4 and connect to the two ends of the corresponding coolant channels 3, allowing coolant to be introduced into the coolant channels 3 to dissipate heat from the cylinder 1. During operation, a low-temperature coolant is continuously introduced into the coolant channels 3 through the inlet pipe 5 from an external cooling circulation system. The initial temperature of the low-temperature coolant is controlled at 15-25℃, and the inlet pressure is 0.3-0.The pressure is 5 MPa, and the flow rate is 5-8 L / min. This parameter setting ensures sufficient flow velocity of the coolant within the channel while preventing damage due to excessive pressure. During its flow within the channel, the coolant absorbs heat transferred from cylinder 1, achieving efficient heat dissipation. The cooled coolant then flows back to the external cooling system via the outlet pipe 6 for further cooling and circulation. Upon return, the coolant temperature rises to 40-60°C, and after being cooled by the condenser in the external cooling system, it becomes a low-temperature coolant again before re-entering the inlet pipe 5, forming a closed-loop cooling cycle.

[0030] An exhaust mechanism 7 is installed on the side wall of cylinder 1 and above heat exchange jacket 2. This mechanism is used to remove gaseous coolant from the coolant channel 3 to reduce coolant dryness. Coolant dryness refers to the proportion of gas phase mass to total mass in a two-phase flow. When the coolant dryness is too high, the proportion of gas phase increases and the proportion of liquid phase decreases. Since the thermal conductivity of the gas phase is much lower than that of the liquid phase, the heat exchange efficiency will decrease significantly. Therefore, by removing gaseous coolant through exhaust mechanism 7 and controlling the coolant dryness at a low level, the heat exchange efficiency can be kept stable. This exhaust mechanism 7 is used to remove the gaseous coolant generated by heating and vaporization in the coolant channel 3 in a timely manner to reduce the coolant dryness and avoid a decrease in heat exchange efficiency due to excessive coolant dryness. It also ensures the stability of coolant circulation. If the gaseous coolant cannot be removed in time, it will accumulate in the coolant channel 3, resulting in a reduction in the effective flow cross-sectional area of ​​the channel, a decrease in coolant flow rate, further aggravating the deterioration of heat dissipation, and even potentially causing "dry burning," damaging cylinder 1 and heat exchange jacket 2. Exhaust mechanism 7 can effectively solve the above problems.

[0031] like Figure 3-4As shown, the exhaust mechanism 7 includes a mounting ring 71, a telescopic tube 72, a magnetic ring 73, a limiting ring 74, a limiting spring 75, an air collecting chamber 76, a connecting channel 77, a sealing ring 78, a partition net 79, a liquid-absorbing sponge 710, a vent hole 711, a pressure plate 712, a through hole 713, and a compression spring 714. An air collecting chamber 76 is provided on the upper side of each coolant channel 3 on the heat exchange jacket 2. The inner wall of the air collecting chamber 76 is polished to reduce the condensation and adhesion of gaseous coolant on the chamber wall. The bottom of the air collecting chamber 76 is connected to the coolant channel 3 through a connecting channel 77. The air collecting chamber 76 is also connected to the tail section of the coolant channel 3 through the connecting channel 77. The coolant has absorbed a significant amount of heat in this area, which will then be transferred to the connecting channel. The channel 77 is located here to allow the gaseous coolant generated by vaporization to quickly enter the gas collection chamber 76, shortening the migration path of the gaseous coolant and improving the exhaust response speed. The mounting ring 71 is fixedly connected to the side wall of the cylinder 1 and is located on the upper side of the heat exchange sleeve 2. Several telescopic tubes 72 are inserted through the mounting ring 71 and are opposite to each gas collection chamber 76. The insertion position of the telescopic tubes 72 on the mounting ring 71 should be equipped with a self-lubricating bushing to ensure lubrication. The telescopic tubes 72 are arranged in a ring with the axis of the heat exchange sleeve 2 as a reference. The outer wall of the telescopic tube 72 and the upper side of the mounting ring 71 is fixedly connected to a limiting ring 74. A limiting spring 75 is sleeved on the telescopic tube 72, and the two ends of the limiting spring 75 are respectively connected to the limiting ring 74 and the mounting ring 71.

[0032] Each telescopic tube 72 is connected by a magnetic ring 73. The magnetic ring 73 is made of neodymium iron boron permanent magnet material, which has strong magnetic force, stable magnetic properties, and long service life. To avoid interference, the mounting ring 71 and the limiting ring 74 should not be made of iron materials, and the magnetic ring 73 is located on the upper side of the limiting ring 74. The inner ring of the magnetic ring 73 is fixedly connected to the top of each telescopic tube 72 by bolts, so that each telescopic tube 72 moves synchronously. The magnetic pole direction of the magnetic ring 73 is set along the axial direction of the telescopic tube 72, which can cooperate with the alternating magnetic field generated by the magnetic induction coil of the linear compressor. When the linear compressor is working, the magnetic induction coil will generate a periodically changing alternating magnetic field. Under the action of the alternating magnetic field, the magnetic ring 73 generates a periodic up and down driving force, which drives the telescopic tube 72 to perform reciprocating up and down motion. There is no need to set up an additional drive mechanism, which simplifies the structure of the exhaust mechanism 7 and reduces energy consumption. The reciprocating up and down frequency of the telescopic tube 72 is consistent with the working frequency of the linear compressor, which improves the synchronicity and effectiveness of exhaust.

[0033] The bottom end of the telescopic tube 72 is inserted into the gas collecting chamber 76 through a insertion hole at the top of the gas collecting chamber 76. A sealing ring 78 is fixedly connected to the telescopic tube 72 and slidably connected within the gas collecting chamber 76. The sealing ring 78 is made of fluororubber, possessing excellent high-temperature resistance and corrosion resistance, capable of withstanding the high-temperature environment and coolant erosion within the gas collecting chamber 76. The outer diameter of the sealing ring 78 is interference-fitted with the inner diameter of the gas collecting chamber 76, with an interference amount of 0.2-0.3mm, ensuring sealing performance and preventing gaseous coolant leakage from the gap between the telescopic tube 72 and the gas collecting chamber 76. A partition mesh 79 is fixedly connected to the bottom of the gas collecting chamber 76. The partition mesh 79 is made of stainless steel woven mesh with a mesh count of 80-100, possessing good air permeability and structural strength, effectively supporting the absorbent sponge 710 above and preventing it from falling. A pressure plate 71 is movably connected to the upper surface of the partition mesh 79 via a compression spring 714. 2. The absorbent sponge 710 is located between the pressure plate 712 and the partition net 79. The absorbent sponge 710 is made of highly absorbent resin sponge with an internal porosity of over 90%, possessing extremely strong water absorption performance. It can quickly absorb residual liquid coolant entrained in the gaseous coolant, preventing liquid coolant from being discharged along with the gaseous coolant and causing coolant loss. The absorbent sponge 710 has several vertically penetrating vent holes 711, which are evenly distributed along the thickness direction of the absorbent sponge 710, facilitating the upward flow of gaseous coolant through the absorbent sponge 710. The pressure plate 712 has through holes 713 corresponding to the positions of the vent holes 711. The diameter of the through holes 713 is the same as the diameter of the vent holes 711, and the two are coaxially arranged to ensure that the gaseous coolant can smoothly pass through the pressure plate 712 and enter the telescopic tube 72, avoiding obstruction of gaseous coolant flow due to mismatched or misaligned vent holes.

[0034] like Figure 1 As shown, the exhaust mechanism 7 also includes a gas collecting ring 715, which is made of stainless steel and has an internal cavity to collect the gaseous coolant discharged from each telescopic pipe 72, thus achieving centralized exhaust. The gas collecting ring 715 is fixedly connected to the top of the side wall of the cylinder 1. The top of the telescopic pipe 72 passes through the bottom wall of the gas collecting ring 715 and communicates with its internal cavity. A sealing gasket is provided at the connection between the telescopic pipe 72 and the gas collecting ring 715 to ensure sealing performance and prevent gaseous coolant leakage. An exhaust pipe 716 is fixedly connected to one side of the gas collecting ring 715 for the discharge of gaseous coolant. The other end of the exhaust pipe 716 is connected to an external condensation recovery system. The external condensation recovery system includes a condenser, a storage tank, and a circulation pump. After the gaseous coolant enters the condenser through the exhaust pipe 716, it is cooled and condensed into liquid coolant, then flows into the storage tank for storage, and is then pumped back to the inlet pipe 5 by the circulation pump, realizing the recycling of coolant, improving the utilization rate of coolant, and reducing the cost of use.

[0035] A protective shell 8 is fixedly connected to the outer wall of the heat exchanger jacket 2 at the position corresponding to the coolant channel 3. The protective shell 8 is made of high-strength aluminum alloy, which has good structural strength and impact resistance, and can effectively protect the air collection chamber 76 and the coolant channel 3. The protective shell 8 is tightly fitted to the outer wall of the heat exchanger jacket 2, and a heat insulation pad is provided at the fitting point. The heat insulation pad is made of ceramic fiber, which has excellent heat insulation performance, can reduce the heat exchange between the heat exchanger jacket 2 and the external environment, and avoid the influence of the external environment temperature on the heat dissipation effect. At the same time, it prevents the heat exchanger jacket 2 from losing heat to the outside and improves heat dissipation efficiency. The back of the protective shell 8 is also equipped with necessary sealing gaskets to provide a seal. The protective shell 8 is detachably connected to the heat exchanger jacket 2 by bolts, which facilitates the later disassembly of the protective shell 8 to maintain and repair internal components such as the coolant channel 3 and the air collection chamber 76. It forms a full-enclosed protection for the air collection chamber 76 and the coolant channel 3, preventing external impurities from entering or colliding and damaging the internal structure. At the same time, it can reduce the heat exchange between the heat exchanger jacket 2 and the external environment, improve heat dissipation efficiency, and facilitate the milling of the coolant channel 3.

[0036] like Figure 4 As shown, a rubber plug 9 is fixedly connected to the upper surface of the pressure plate 712 at the position corresponding to the telescopic tube 72. The rubber plug 9 is made of nitrile rubber, which has good elasticity and sealing performance. The diameter of the rubber plug 9 matches the inner diameter of the bottom end of the telescopic tube 72. When the telescopic tube 72 moves down, the rubber plug 9 can be inserted into the bottom of the telescopic tube 72 to seal it. When the telescopic tube 72 moves down to the lowest position, the rubber plug 9 is fully inserted into the bottom end of the telescopic tube 72, thereby sealing the bottom of the telescopic tube 72 and preventing the gaseous coolant in the gas collection chamber 76 from being discharged through the telescopic tube 72. This provides a closed environment for the subsequent squeezing of the liquid-absorbing sponge 710 to recover the liquid coolant.

[0037] When this equipment is working, the magnetic coil of the compressor is energized, and the magnetic pole change drives the piston head of the compressor to reciprocate. Cylinder 1 generates a large amount of heat due to piston friction and gas compression. At this time, coolant is introduced into the coolant channel 3 through the inlet pipe 5 by the external cooling circulation system. The coolant flows through the coolant channel 3, absorbing the heat transferred from cylinder 1 during its liquid-gas phase change process, thus dissipating heat from cylinder 1. Simultaneously, under the action of the magnetic coil, the magnetic ring 73 drives the telescopic tube 72 to reciprocate. When the magnetic field generated by the magnetic coil is upward, the magnetic ring 73 receives an upward driving force, causing the telescopic tube 72 to move upward. The bottom end of the telescopic tube 72 separates from the rubber plug 9, and the gaseous coolant in the coolant channel 3 floats upward into the gas collecting chamber 76. The remaining liquid coolant is absorbed by the absorbent sponge 710, and the gas is collected. The gaseous coolant in cavity 76 enters the telescopic tube 72 through the vent 711 of the absorbent sponge 710 and the through hole 713 of the pressure plate 712, then enters the gas collecting ring 715 through the telescopic tube 72, and finally is discharged to the external condensation recovery system through the exhaust pipe 716. When the magnetic field generated by the magnetic coil is downward, the magnetic ring 73 is driven downward, which drives the telescopic tube 72 to move downward. The rubber plug 9 at the bottom of the telescopic tube 72 is inserted into the bottom of the telescopic tube 72 to seal it. At the same time, the telescopic tube 72 presses the pressure plate 712 downward. The pressure plate 712 compresses the compression spring 714 and the absorbent sponge 710. The sealing ring 78 moves downward, and the liquid coolant is squeezed out of the absorbent sponge 710. At the same time, due to the high pressure generated by the downward movement of the sealing ring 78, the liquid coolant in the gas collecting cavity 76 is forced back into the coolant channel 3 to rejoin the cooling cycle.

[0038] Through the above-mentioned circulation process, the gaseous coolant in the coolant channel 3 can be continuously discharged, effectively reducing the dryness of the coolant and ensuring the heat exchange efficiency and stability of the cooling system.

[0039] The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A cylinder cooling structure of a linear compressor comprising a cylinder, characterized by: The outer side of the cylinder is sleeved with a heat exchange sleeve which wraps the bottom and side wall of the cylinder, a plurality of cooling liquid channels are formed on the heat exchange sleeve, a connecting seat is fixedly connected to the heat exchange sleeve at a position corresponding to each cooling liquid channel, an inlet pipe and an outlet pipe are respectively arranged at the two ends of the connecting seat, and the inlet pipe and the outlet pipe pass through the connecting seat and are respectively communicated with the two ends of the corresponding cooling liquid channel, and cooling liquid is introduced into the cooling liquid channel to dissipate heat from the cylinder. An exhaust mechanism is arranged on the side wall of the cylinder and above the heat exchange sleeve to remove gaseous cooling liquid in the cooling liquid channel to reduce the dryness of the cooling liquid.

2. A cylinder cooling structure of a linear compressor according to claim 1, characterized in that: The number of the cooling liquid channels is not less than four, and the four cooling liquid channels are arranged in a ring shape with the cylinder axis as a reference, and the cooling liquid channels are in a continuous S shape.

3. A cylinder cooling structure of a linear compressor according to claim 2, characterized in that: The exhaust mechanism comprises a mounting ring, an extension pipe, a magnetic ring, a limiting ring, a limiting spring, a gas collecting cavity, a connecting channel, a sealing ring, a separation net, a liquid absorbing sponge, a gas permeable hole, a pressing plate, a through hole and a compression spring, a gas collecting cavity is formed on the upper side of the heat exchange sleeve corresponding to each cooling liquid channel, the bottom of the gas collecting cavity is communicated with the cooling liquid channel through the connecting channel, the mounting ring is fixedly connected to the side wall of the cylinder and above the heat exchange sleeve, a plurality of extension pipes are inserted into the mounting ring and opposite to each gas collecting cavity, the outer wall of the extension pipe and the upper side of the mounting ring are fixedly connected with the limiting ring, the limiting spring is sleeved on the extension pipe, and the two ends of the limiting spring are connected with the limiting ring and the mounting ring, the extension pipes are connected through the magnetic ring, and the magnetic ring is above the limiting ring, the bottom end of the extension pipe is inserted into the gas collecting cavity through the top of the gas collecting cavity, the sealing ring is fixedly connected to the extension pipe and slidably connected in the gas collecting cavity, the bottom of the gas collecting cavity is fixedly connected with the separation net, the upper surface of the separation net is movably connected with the pressing plate through the compression spring, the liquid absorbing sponge is between the pressing plate and the separation net, a plurality of gas permeable holes are formed in the liquid absorbing sponge, and the through hole is formed in the pressing plate corresponding to the gas permeable hole.

4. A cylinder cooling structure of a linear compressor according to claim 3, characterized in that: The exhaust mechanism further comprises a gas collecting ring, the gas collecting ring is fixedly connected to the top end of the side wall of the cylinder, the top end of the extension pipe penetrates the bottom wall of the gas collecting ring and communicates with the inner cavity thereof, and an exhaust pipe is fixedly connected to one side of the gas collecting ring for discharging gaseous cooling liquid.

5. A cylinder cooling structure of a linear compressor according to claim 4, characterized in that: The extension pipes are arranged in a ring shape with the heat exchange sleeve axis as a reference.

6. A cylinder cooling structure of a linear compressor according to claim 5, wherein: A protective shell is fixedly connected to the outer wall of the heat exchange sleeve at a position corresponding to the cooling liquid channel to cover the gas collecting cavity and the cooling liquid channel.

7. A cylinder cooling structure of a linear compressor according to claim 6, wherein: The gas collecting cavity is communicated with the tail section of the cooling liquid channel through the connecting channel.

8. A cylinder cooling structure of a linear compressor according to claim 7, wherein: A rubber plug is fixedly connected to the upper surface of the pressing plate corresponding to the position of the extension pipe, and the rubber plug can be inserted into the bottom of the extension pipe to seal when the extension pipe moves downward.

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