Reciprocating compressor with improved heat efficiency and refrigeration equipment

Abstract

The utility model belongs to the technical field of compressors, and particularly discloses a reciprocating compressor with improved heat efficiency and refrigeration equipment, the reciprocating compressor comprises a machine core, a shell, a motor, an air suction silencer, an air suction pipe, an exhaust silencer and an exhaust pipe assembly, and the reciprocating compressor is applied to the refrigeration equipment. The annular cover with the opening facing the cylinder hole is arranged at the circumferential position of the outer side of the crankshaft, so that the oil throwing path of the crankshaft is optimized, and an oil film which prevents the interior of a compressor cavity from transferring heat to the environment is prevented from being formed. A connector is arranged between the air suction silencer and the air suction pipe, the connector is in clearance fit with the air suction pipe, normal circulation of a refrigerant in an air path system in the initial operation stage of the reciprocating compressor is guaranteed, and the connector is in close fit with an air inlet of the air suction silencer so that the suction amount of overheated air in a cavity of the compressor can be reduced. By improving the heat efficiency of the reciprocating compressor, the problems that the initial temperature of compressed gas is too high and sucked gas is too hot are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to compressor technical field relates to a heat efficiency improved reciprocating compressor and refrigeration plant. BACKGROUND

[0002] As a kind of widely used in industrial and refrigeration field compression equipment, its working principle relies on the rotary motion of crankshaft, and through connecting rod drive piston reciprocating motion in cylinder, to realize the compression of gas. In this process, gas is compressed and releases a large amount of heat energy, so that the temperature of gas rises.

[0003] However, the current reciprocating compressor gas path system mainly includes cylinder cover, exhaust muffler, suction pipe, exhaust pipe and other components, these components generally adopt copper alloy or aluminum alloy material. Because metal alloy has good thermal conductivity, when high-temperature gas flows through the gas path system of reciprocating compressor, a large amount of heat energy is transferred to the inside of compressor cavity, causing the temperature of gas inside the compressor cavity to rise, thereby causing the problem of overheating of the gas inlet of the suction muffler, and the initial temperature of the compressed gas in the cylinder also rises, resulting in reduced compressor operating efficiency.

[0004] In addition, the existing reciprocating compressor is easy to form an oil film on the inner wall of the upper shell when the crankshaft rotates, which hinders the heat conduction from the inside of the cavity to the environment, reduces the heat transfer from the inside of the compressor cavity to the outside environment, and is not conducive to the heat dissipation of the compressor cavity.

[0005] In addition, the existing reciprocating compressor generally uses a flared inlet for the suction muffler, which has a large suction cross-sectional area between the suction muffler and the suction pipe, causing the suction muffler to inevitably suck a large amount of overheated gas from the inside of the compressor cavity while sucking low-temperature gas containing refrigerant, which also adversely affects the overall performance of the reciprocating compressor.

[0006] Therefore, the structure of the reciprocating compressor in the prior art needs to be further improved. UTILITY MODEL CONTENTS

[0007] The utility model aims at providing a heat efficiency improved reciprocating compressor and refrigeration plant, which improves the heat efficiency of the reciprocating compressor to avoid the problems of excessively high initial temperature of compressed gas and overheating of suction.

[0008] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0009] A heat efficiency improved reciprocating compressor, comprising a core, a shell, a motor, a suction muffler, a suction pipe, an exhaust muffler and an exhaust pipe assembly;

[0010] The core is arranged in the shell, and the core includes a crankcase and a cylinder, the crankcase is provided with a crankshaft, and the crankshaft is connected with a piston of the cylinder through a connecting rod; an annular cover is further arranged in the crankcase and located outside the crankshaft;

[0011] The motor is arranged in the shell and is connected with the crankshaft in power;

[0012] The air inlet of the cylinder is connected with an air suction muffler, the air suction muffler is connected with one end of an air suction pipe through a connecting head, and the other end of the air suction pipe passes through the shell and extends to the outside of the shell;

[0013] The air outlet of the cylinder is connected with an air exhaust muffler, the air exhaust muffler is connected with one end of an air exhaust pipe assembly, and the other end of the air exhaust pipe assembly passes through the shell and extends to the outside of the shell.

[0014] Preferably, one end of the connecting head is tightly matched with the air inlet of the air suction muffler, and the other end of the connecting head is gap matched with one end of the air suction pipe.

[0015] Preferably, the installation angle of the air suction pipe is parallel to the angle of the air inlet of the air suction muffler.

[0016] Preferably, the air exhaust pipe assembly includes an inner air exhaust pipe, a sealing joint, an outer air exhaust pipe and a sealing ring;

[0017] The air outlet of the air exhaust muffler is connected with one end of the inner air exhaust pipe, the other end of the inner air exhaust pipe is connected with one end of the outer air exhaust pipe through the sealing joint, and the other end of the outer air exhaust pipe passes through the shell and extends to the outside of the shell.

[0018] The sealing joint is provided with a groove, and the sealing ring is arranged in the groove of the sealing joint.

[0019] Preferably, the air exhaust muffler, the inner air exhaust pipe, the sealing joint and the cylinder cover of the cylinder are all made of heat insulation materials.

[0020] Preferably, the annular cover is arranged at a circumferential position outside the crankshaft, and the annular cover is concentric with the rotation axis of the crankshaft.

[0021] The annular cover is further provided with an opening, and the opening of the annular cover is directed to the cylinder bore of the cylinder.

[0022] Preferably, the outer side of the cylinder cover of the cylinder is provided with a sealing framework.

[0023] Preferably, the sealing framework is made of metal materials.

[0024] Preferably, the shell is further provided with a process pipe for vacuumizing and adding refrigerant.

[0025] A refrigeration equipment is provided with the reciprocating compressor with improved thermal efficiency.

[0026] Compared with the prior art, the utility model has the following beneficial effects:

[0027] As described above, the utility model discloses a reciprocating compressor of improved thermal efficiency, which is applied to refrigeration equipment, the reciprocating compressor is first provided with an annular cover with an opening direction towards the cylinder hole at the circumferential position of the crankshaft, the annular cover is concentric with the rotation axis of the crankshaft, can optimize the oil throwing path of the crankshaft, makes the oil liquid in the direction of the cylinder hole can normally throw, the oil liquid in the rest direction will be blocked by the annular cover and drop along the inner wall of the annular cover, thereby reducing the oil liquid thrown to the upper part of the shell, avoiding the oil film formed to hinder the heat transfer of the compressor cavity inside to the environment.In addition, the reciprocating compressor of the utility model is also provided with a connecting head, one end of the connecting head is closely matched with the air inlet of the suction muffler, the function is to reduce the suction cross section area, thereby reducing the suction amount of the overheated gas in the compressor cavity, the other end of the connecting head is gap matched with the suction pipe, and a gap is left between the two, which can ensure the normal circulation of refrigerant in the gas path system in the initial stage of the reciprocating compressor operation.The reciprocating compressor of improved thermal efficiency of the utility model can reduce the heat conduction between the compressor cavity and the gas path system while promoting the heat dissipation of the compressor cavity to the external environment, so as to improve the thermal efficiency of the reciprocating compressor, thereby avoiding the problems of too high initial temperature of the compressed gas entering the cylinder and overheating of the suction. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description.

[0029] Figure 1 It is the top view of the reciprocating compressor of improved thermal efficiency of the utility model embodiment;

[0030] Figure 2 It is the bottom view of the reciprocating compressor of improved thermal efficiency of the utility model embodiment;

[0031] Figure 3 It is the front view of the reciprocating compressor of improved thermal efficiency of the utility model embodiment;

[0032] Figure 4 It is the rear view of the reciprocating compressor of improved thermal efficiency of the utility model embodiment;

[0033] Figure 5 It is the left view of the reciprocating compressor of improved thermal efficiency of the utility model embodiment;

[0034] Figure 6 It is the right view of the reciprocating compressor of improved thermal efficiency of the utility model embodiment;

[0035] Figure 7 A perspective view of a reciprocating compressor with improved thermal efficiency according to an embodiment of the present application;

[0036] Figure 8 An exploded structural schematic view of a reciprocating compressor with improved thermal efficiency according to an embodiment of the present application;

[0037] Figure 9 A structural schematic view of an annular cover according to an embodiment of the present application;

[0038] Figure 10 A structural schematic view of a sealing framework according to an embodiment of the present application;

[0039] Figure 11 A structural schematic view of a cylinder cover according to an embodiment of the present application;

[0040] Figure 12 A structural schematic view of an air suction pipe according to an embodiment of the present application;

[0041] Figure 13 A structural schematic view of an air suction silencer according to an embodiment of the present application;

[0042] Figure 14 A structural schematic view of a connecting head according to an embodiment of the present application;

[0043] Wherein, 11 - crankcase, 12 - cylinder, 13 - crankshaft, 14 - annular cover, 15 - sealing framework, 2 - shell, 3 - motor, 4 - air suction silencer, 5 - air suction pipe;

[0044] 6 - exhaust silencer, 61 - gasket, 71 - inner exhaust pipe, 72 - sealing joint, 73 - outer exhaust pipe, 74 - sealing ring, 8 - connecting head, 9 - process pipe. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application.

[0046] Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0047] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0048] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0050] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0051] Example 1

[0052] like Figures 1 to 14 As shown, the reciprocating compressor with improved thermal efficiency in this embodiment includes a core, a housing 2, a motor 3, an intake silencer 4, an intake pipe 5, an exhaust silencer 6, and an exhaust pipe assembly.

[0053] The mechanism is located inside the housing 2. The mechanism includes a crankcase 11 and a cylinder 12. A crankshaft 13 is housed inside the crankcase 11, and the crankshaft 13 is connected to the piston of the cylinder 12 via a connecting rod. An annular cover 14 is also provided inside the crankcase 11, and the annular cover 14 is located outside the crankshaft 13.

[0054] In this embodiment, the shell 2 comprises an upper shell (not shown) and a lower shell which are detachably connected. The annular cover 14 is preferably arranged at a circumferential position outside the crankshaft 13, and the annular cover 14 is concentric with the rotation axis of the crankshaft 13. The annular cover 14 is further provided with an opening, and the opening of the annular cover 14 is directed towards the cylinder hole of the cylinder 12. The annular cover 14 is used to optimize the oil throwing path of the crankshaft 13, limit the position of the oil thrown out of the oil throwing hole above the eccentric shaft, and enable the oil in the direction of the cylinder hole to be normally thrown out. The oil in the remaining directions is blocked by the annular cover 14 and falls along the inner wall of the annular cover 14, thereby reducing the oil film area formed after the oil is thrown to the inner wall of the upper shell, and preventing the formed oil film from hindering the heat conduction of the heat inside the cavity to the environment. In addition, the annular cover 14 is preferably made of PA6 (polyamide 6) with 30% glass fiber, which has good temperature resistance and high pressure resistance.

[0055] The motor 3 is arranged inside the shell 2, and the motor 3 is power connected with the crankshaft 13. The rotation movement of the crankshaft 13 is driven by the motor 3.

[0056] The air inlet of the cylinder 12 is connected with the air suction muffler 4, and the air suction muffler 4 is connected with one end of the air suction pipe 5 through the connecting head 8. The other end of the air suction pipe 5 penetrates through the shell 2 and extends to the outside of the shell 2.

[0057] Specifically, one end of the connecting head 8 is tightly matched with the air inlet of the air suction muffler 4, so as to reduce the cross-sectional area of the suction of the overheated gas inside the compressor cavity, thereby reducing the suction of the overheated gas inside the compressor cavity and improving the gas compression efficiency of the compressor. The other end of the connecting head 8 is gap matched with one end of the air suction pipe 5, and a gap is left between the two, so as to ensure that the refrigerant can normally circulate in the system during the initial operation of the compressor. In addition, the installation angle of the air suction pipe 5 is preferably parallel to the angle of the air inlet of the air suction muffler 4, which is helpful to optimize the air flow.

[0058] The air outlet of the cylinder 12 is connected with the air exhaust muffler 6, and the air exhaust muffler 6 is connected with one end of the air exhaust pipe assembly. The other end of the air exhaust pipe assembly penetrates through the shell 2 and extends to the outside of the shell 2.

[0059] Specifically, the air exhaust pipe assembly comprises an inner air exhaust pipe 71, a sealing joint 72, an outer air exhaust pipe 73 and a sealing ring 74. The air outlet of the air exhaust muffler 6 is connected with one end of the inner air exhaust pipe 71. The other end of the inner air exhaust pipe 71 is connected with one end of the outer air exhaust pipe 73 through the sealing joint 72. The other end of the outer air exhaust pipe 73 penetrates through the shell 2 and extends to the outside of the shell 2. In this embodiment, the gasket 61, the annular cover 14 and the air exhaust muffler 6 are assembled together by screws, and the sealing is realized by controlling the size of the pre-tightening force of the screws. One end of the inner air exhaust pipe 71 is assembled with the air exhaust muffler 6 by screws, and the connection position is fused and welded together by laser welding technology, thereby realizing the sealing.

[0060] The sealing joint 72 is provided with a groove, and the sealing ring 74 is installed in the groove of the sealing joint 72. The sealing joint 72 is inserted into the outer exhaust pipe 73, and the air tightness is ensured by the sealing ring 74, so that the sealing between the inner exhaust pipe 71 and the outer exhaust pipe 73 is realized. In order to prevent the sealing joint 72 from being pulled out of the outer exhaust pipe 73, the edge of the outer exhaust pipe 73 on the side of the sealing joint 72 is clamped to the deformation by a tool clamp after the installation of the compressor is completed.

[0061] In order to reduce the heat transfer from the compressor gas path system to the inside of the cavity, the exhaust silencer 6, the inner exhaust pipe 71, the sealing joint 72 and the cylinder cover of the cylinder 12 in the embodiment are preferably made of heat insulation material. The heat insulation material is preferably made of PA6 with 30% glass fiber.

[0062] In order to prevent the cylinder cover from leaking and reduce thermal deformation, the reciprocating compressor of the embodiment is further provided with a sealing skeleton 15 outside the cylinder cover of the cylinder 12. The sealing skeleton 15 is preferably made of metal material, and the cylinder cover and the sealing skeleton 15 are fixed to the side of the stem of the core by screws.

[0063] In addition, the shell 2 is further provided with a process pipe 9, which is used to communicate the inside of the compressor cavity, and to pump vacuum and inject refrigerant before the compressor is started.

[0064] The use process of the reciprocating compressor with improved thermal efficiency in the embodiment is as follows:

[0065] After the compressor is started, the crankshaft 13 is driven to rotate by the motor 3, and then the piston is driven to make a reciprocating linear motion in the cylinder 12 through the connecting rod. When the piston moves away from the cylinder cover, the volume in the cylinder 12 increases, forming a low pressure area. The external gas (usually refrigerant) enters the suction silencer 4 through the suction pipe 5, and the suction silencer 4 helps to reduce the noise generated when the gas flows. The connecting head 8 connects the suction silencer 4 and the suction pipe 5, which ensures smooth gas flow while reducing the suction of overheated gas in the inside of the compressor cavity. The installation angle of the suction pipe 5 is parallel to the suction silencer inlet, which helps to optimize the gas flow. The gas enters the suction silencer 4 from the suction silencer 4, which prepares for the compression process.

[0066] When the piston is pushed by the connecting rod to move towards the cylinder head, the gas in the cylinder 12 is compressed. The annular cover 14 is located outside the crankshaft 13 and is concentric with the rotation axis of the crankshaft 13, and the opening thereof faces the cylinder hole of the cylinder 12, which helps to balance the pressure in the crankcase 11 and reduce the friction loss. When the piston reaches the end of its stroke, the high-pressure gas in the cylinder 12 enters the exhaust muffler 6 through the gas outlet. The exhaust muffler 6 further reduces the noise of the gas emission. The high-pressure gas from the exhaust muffler 6 enters the inner exhaust pipe 71, and then flows into the outer exhaust pipe 73 through the sealing joint 72 (where a sealing ring 74 is installed to ensure air tightness), and the outer exhaust pipe 73 extends to the outside of the shell 2 to discharge the high-pressure gas from the compressor for subsequent cooling or condensation process.

[0067] In addition, the exhaust muffler 6, the inner exhaust pipe 71, the sealing joint 72 and the cylinder head made of heat insulation material help to reduce the heat transfer from the compressor gas path system to the inside of the cavity, and eliminate the occurrence of suction overheating. The sealing skeleton 15 arranged outside the cylinder head enhances the sealing performance of the cylinder 12 and prevents gas leakage.

[0068] Embodiment 2

[0069] A refrigeration equipment is provided with the heat efficiency improved reciprocating compressor described in embodiment 1. The refrigeration equipment includes a refrigerator, a freezer, an air conditioner and the like.

[0070] The heat efficiency improved reciprocating compressor of the utility model is applied to the refrigeration equipment, an annular cover with an opening direction facing the cylinder hole is arranged at the circumferential position outside the crankshaft, the annular cover is concentric with the rotation axis of the crankshaft, the oil throwing path of the crankshaft is optimized, the oil liquid in the direction of the cylinder hole can be normally thrown out, the oil liquid in the remaining direction is blocked by the annular cover and falls along the inner wall of the annular cover, thereby reducing the oil liquid thrown to the upper part of the shell and avoiding forming the oil film hindering the heat transfer from the inside of the compressor cavity to the environment. In addition, the reciprocating compressor of the utility model is further provided with a connecting head, one end of the connecting head is closely matched with the gas inlet of the suction muffler, the function thereof is reducing the suction area, thereby reducing the suction amount of the overheated gas in the compressor cavity, the other end of the connecting head is gap matched with the suction pipe, a gap is left between the two, which can ensure the normal circulation of the refrigerant in the gas path system in the initial stage of the reciprocating compressor. The heat efficiency improved reciprocating compressor of the utility model can reduce the heat conduction between the inside of the compressor cavity and the gas path system while promoting the heat dissipation from the inside of the compressor cavity to the external environment, so as to improve the heat efficiency of the reciprocating compressor, thereby avoiding the problems of the initial temperature of the compressed gas being too high and the suction overheating.

[0071] So far, the present embodiment has been described in detail in conjunction with the drawings. According to the above description, those skilled in the art should have a clear understanding of the heat efficiency improved reciprocating compressor and refrigeration equipment of the present application. Of course, the above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made under the utility model concept of the present application, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application, and should be protected by the present application.

Claims

1. A reciprocating compressor with improved thermal efficiency, characterized in that, Includes the movement mechanism, housing, motor, intake muffler, intake pipe, exhaust muffler, and exhaust pipe assembly; The mechanism is located inside the housing and includes a crankcase and a cylinder. The crankcase contains a crankshaft, which is connected to the piston of the cylinder via a connecting rod. An annular cover is also provided inside the crankcase, located on the outside of the crankshaft. The motor is located inside the housing and is powered by the crankshaft; The cylinder's air inlet is connected to an intake muffler, which is connected to one end of an intake pipe via a connector. The other end of the intake pipe passes through the housing and extends to the outside of the housing. The cylinder outlet is connected to the exhaust muffler, which is connected to one end of the exhaust pipe assembly. The other end of the exhaust pipe assembly passes through the housing and extends to the outside of the housing.

2. The reciprocating compressor with improved thermal efficiency according to claim 1, characterized in that, One end of the connector is tightly fitted to the air inlet of the intake muffler, and the other end of the connector is loosely fitted to one end of the intake pipe.

3. The reciprocating compressor with improved thermal efficiency according to claim 1 or 2, characterized in that, The installation angle of the intake pipe is parallel to the angle of the intake muffler inlet.

4. The reciprocating compressor with improved thermal efficiency according to claim 1, characterized in that, The exhaust pipe assembly includes an inner exhaust pipe, a sealing joint, an outer exhaust pipe, and a sealing ring; The exhaust muffler's outlet is connected to one end of the inner exhaust pipe, and the other end of the inner exhaust pipe is connected to one end of the outer exhaust pipe through a sealing joint. The other end of the outer exhaust pipe passes through the housing and extends to the outside of the housing. The sealing joint has a groove, and the sealing ring is installed in the groove of the sealing joint.

5. The reciprocating compressor with improved thermal efficiency according to claim 4, characterized in that, The exhaust muffler, internal exhaust pipe, sealing joint, and cylinder head are all made of heat-insulating material.

6. The reciprocating compressor with improved thermal efficiency according to claim 1, characterized in that, The annular cover is located on the circumference of the outer side of the crankshaft, and the annular cover is concentric with the rotation axis of the crankshaft. The annular cover is also provided with an opening, and the opening of the annular cover faces the cylinder bore.

7. The reciprocating compressor with improved thermal efficiency according to claim 1 or 5, characterized in that, A sealing frame is provided on the outside of the cylinder head of the cylinder.

8. The reciprocating compressor with improved thermal efficiency according to claim 7, characterized in that, The sealing frame is made of metal.

9. The reciprocating compressor with improved thermal efficiency according to claim 1, characterized in that, The housing is also equipped with process tubes for vacuuming and refrigerant charging.

10. A refrigeration device, characterized in that, The refrigeration equipment is equipped with a reciprocating compressor with improved thermal efficiency as described in any one of claims 1 to 9.

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