Rotary compressor and refrigeration apparatus

Abstract

The utility model discloses a rotary compressor and refrigeration plant relates to compressor technical field, and rotary compressor includes cylinder body and two sealing end covers, and cylinder body has two ends in the first direction, and cylinder body has a cavity, and two openings are arranged at both ends and communicate the cavity, and the side of cylinder body is provided with the suction hole that communicates with the cavity, two sealing end covers include first end cover and second end cover, and first end cover is provided with the exhaust hole, and first end cover and second end cover are installed at both ends of cylinder body respectively and cover the both ends of cylinder body and set up to form compression chamber with cylinder body enclose, and at least part of first end cover covers the region of cylinder body and is provided with suction hole, so that at least part of the projection of suction hole falls on first end cover in the first direction, and the first end cover in this application can block the direct heat exchange between at least part of high temperature oil gas mixture and suction hole, thereby avoiding the suction temperature of rotary compressor too high, and effectively improving the refrigeration efficiency of refrigeration plant.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to a rotary compressor and refrigeration equipment. Background Technology

[0002] In related technologies, during the operation of a rotary compressor, the high-temperature, high-pressure refrigerant gas mixed with lubricating oil discharged from the pump body flows through a path adjacent to the suction port of the cylinder. This causes the high-temperature oil-gas mixture to heat the low-temperature, low-pressure refrigerant inside the suction port. The high-temperature oil-gas mixture directly heats the cylinder wall, especially the suction port area, resulting in the newly drawn-in low-temperature, low-pressure refrigerant gas being preheated before entering the compression chamber, thus increasing the suction temperature and affecting the refrigeration efficiency of the refrigeration equipment. Utility Model Content

[0003] The main purpose of this invention is to propose a rotary compressor and refrigeration equipment, which aims to solve the problem of thermal interference of high-temperature oil-gas mixture on the suction port area in rotary compressors in related technologies.

[0004] To achieve the above objectives, this utility model proposes a rotary compressor, which includes: A cylinder body has two ends in a first direction, the cylinder body has a cavity and two openings at its two ends communicating with the cavity, and an intake port communicating with the cavity is provided on the side of the cylinder body; and Two sealing end caps, including a first end cap and a second end cap, the first end cap being provided with an exhaust hole, the first end cap and the second end cap being respectively installed at both ends of the cylinder body and covering the two ports of the cylinder body, so as to form a compression chamber with the cylinder body; Wherein, at least a portion of the first end cap covers the area of ​​the cylinder body where the air intake hole is provided, such that the projection of at least a portion of the air intake hole in the first direction falls on the first end cap.

[0005] In one embodiment, at least a portion of the first end cap extends laterally beyond one end of the cylinder body.

[0006] In one embodiment, the periphery of the first end cap extends laterally beyond the periphery of the cylinder body.

[0007] In one embodiment, the first end cap includes a mounting portion and a sealing portion connected sequentially in the first direction, the sealing portion being located between the mounting portion and the cylinder body; On a plane perpendicular to the first direction, the cross-sectional area of ​​the sealing portion is smaller than the cross-sectional area of ​​the mounting portion.

[0008] In one embodiment, the projection of the sealing portion in the first direction is entirely located within the cylinder body.

[0009] In one embodiment, the mounting portion includes a central portion and an edge portion surrounding the central portion; In the first direction, the size of the edge portion is larger than the size located at the junction of the edge portion and the middle portion.

[0010] In one embodiment, the first end cap is bolted to the cylinder body, and the bolt is located in the middle.

[0011] In one embodiment, the orthographic projection of the air intake in the first direction is entirely located on the first end cap.

[0012] In one embodiment, the portion of the first end cap opposite the air intake in the first direction contacts the cylinder body.

[0013] This utility model also proposes a refrigeration device, which includes a rotary compressor.

[0014] In the technical solution of this application, since the exhaust port is located on the first end cover, by setting the first end cover to at least partially cover the area on the cylinder body where the intake hole is located, the first end cover can not only seal the cavity, but also block the direct heat exchange between at least part of the high-temperature oil-gas mixture and the intake hole, thereby avoiding excessively high intake temperature of the rotary compressor and effectively improving the refrigeration efficiency of the refrigeration equipment. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 A cross-sectional view of a rotary compressor according to an embodiment of the present invention; Figure 2 A schematic diagram of the assembly structure between the cylinder body and the first end cap according to an embodiment of the present utility model; Figure 3 A schematic diagram of the structure of the first end cap according to an embodiment of the present invention; Figure 4 A cross-sectional view of the first end cap of an embodiment of the present invention.

[0017] Explanation of icon numbers: 1. Cylinder body; 2. Cavity; 21. Compression chamber; 3. Intake port; 4. Sealing end cover; 41. First end cover; 411. Mounting part; 4111. Middle part; 4112. Edge part; 412. Sealing part; 42. Second end cover; 5. Bolt.

[0018] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0020] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are 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 with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] In related technologies, during the operation of a rotary compressor, the high-temperature, high-pressure refrigerant gas mixed with lubricating oil discharged from the pump body flows through a path adjacent to the suction port of the cylinder. This causes the high-temperature oil-gas mixture to heat the low-temperature, low-pressure refrigerant inside the suction port. The high-temperature oil-gas mixture directly heats the cylinder wall, especially the suction port area, resulting in the newly drawn-in low-temperature, low-pressure refrigerant gas being preheated before entering the compression chamber, thus increasing the suction temperature and affecting the refrigeration efficiency of the refrigeration equipment.

[0023] In view of this, this application proposes a rotary compressor. Figures 1 to 4 These are some embodiments of this application.

[0024] Please see Figure 1 In some embodiments of this application, the rotary compressor includes a cylinder body 1 and two sealing end caps 4. The cylinder body 1 has two ends in a first direction, a cavity 2, and two openings at its two ends communicating with the cavity 2. An intake port 3 communicating with the cavity 2 is provided on the side of the cylinder body 1. The two sealing end caps 4 include a first end cap 41 and a second end cap 42. The first end cap 41 has an exhaust port. The first end cap 41 and the second end cap 42 are respectively installed at both ends of the cylinder body 1 and cover the two ports of the cylinder body 1 to communicate with the cylinder. The cylinder body 1 encloses and forms a compression chamber 21. Low-pressure gaseous refrigerant enters the compression chamber 21, which is formed by the cylinder body 1, the first end cover 41, and the second end cover 42, through the suction port 3 on the side of the cylinder body 1. A rotating component, such as a cam, compresses the gaseous refrigerant in the compression chamber 21. As the rotating component continues to move, the gas drawn into the compression chamber 21 is compressed and isolated, causing its pressure and temperature to rise. When the pressure inside the compressor exceeds the exhaust resistance, the high-pressure gas mixed with some lubricating oil is discharged from the exhaust port of the first end cover 41, thereby realizing the intake, compression, and exhaust cycle of the rotary compressor.

[0025] In some embodiments of this application, at least a portion of the first end cap 41 covers the area of ​​the cylinder 1 where the intake hole 3 is provided, such that the projection of at least a portion of the intake hole 3 in the first direction falls on the first end cap 41; in this embodiment, the first end cap 41 can prevent at least a portion of the high-temperature oil-gas mixture from exchanging heat with the intake hole 3.

[0026] In conjunction with the above, in the technical solution of this application, since the exhaust port is located on the first end cover 41, by setting the first end cover 41 to at least partially cover the area on the cylinder 1 where the intake hole 3 is provided, the first end cover 41 can not only seal the cavity 2, but also block the direct heat exchange between at least part of the high-temperature oil-gas mixture and the intake hole 3, thereby avoiding excessively high intake temperature of the rotary compressor and effectively improving the refrigeration efficiency of the refrigeration equipment.

[0027] It should be further noted that the combination of cylinder 1, first end cover 41 and second end cover 42 in the embodiments of this application constitutes the pump body in the related technology.

[0028] Since the high-temperature oil-gas mixture is discharged from the exhaust port on the first end cover 41, the high-temperature oil-gas mixture is located on the side of the cylinder 1 facing the first end cover 41. Therefore, at least part of the first end cover 41 covers the area of ​​the cylinder 1 where the intake port 3 is located, so as to prevent at least part of the high-temperature oil-gas mixture from exchanging heat with the intake port 3.

[0029] Furthermore, since the pump body, consisting of cylinder 1, first end cover 41, and second end cover 42, needs to be fixed to the housing of the rotary compressor, and in related technologies, the cylinder 1 is fixed to the housing, but in this application, since at least a portion of the first end cover 41 needs to cover the intake port, please refer to [the relevant documentation / reference needed]. Figures 1 to 2 In some embodiments of this application, at least a portion of the first end cap 41 extends laterally beyond one end of the cylinder body 1. In this embodiment, by setting at least a portion of the first end cap 41 to extend laterally beyond one end of the cylinder body 1, the first end cap 41 can serve as an installation reference for the pump body. This allows the operator or tooling to assemble the pump body, consisting of the cylinder body 1, the first end cap 41, and the second end cap 42, onto the housing via the first end cap 41. This solves the problem of difficulty in assembling the cylinder body 1 and the housing due to the first end cap 41 at least partially covering the air intake port. This simplifies the overall installation process.

[0030] In some embodiments of this application, the periphery of the first end cover 41 is laterally extended beyond the periphery of the cylinder body 1; this arrangement enables the first end cover 41 to provide a surrounding and stable mounting reference for the entire pump body, that is, the entire periphery of the first end cover 41 can be fixed to the housing, thereby enhancing the connection stability and reliability of the pump body within the housing.

[0031] Please see Figure 3 and Figure 4 In some embodiments of this application, the first end cap 41 includes a mounting portion 411 and a sealing portion 412 connected sequentially in the first direction. The sealing portion 412 is located between the mounting portion 411 and the cylinder body 1. On a plane perpendicular to the first direction, the cross-sectional area of ​​the sealing portion 412 is smaller than the cross-sectional area of ​​the mounting portion 411. In this embodiment, the sealing portion 412 fits against the cylinder body 1 through a precision-machined surface to achieve a high-precision seal between it and the cylinder body 1, preventing leakage from the compression chamber 21. The mounting portion 411 is fixed to the outer casing of the rotary compressor. By setting the cross-sectional area of ​​the sealing portion 412 to be smaller than that of the mounting portion 411, the sealing contact area requiring high-precision machining of the first end face can be significantly reduced. This effectively reduces the complexity and processing cost of the manufacturing process of the first end cap 41 while ensuring the sealing reliability of the first end cap 41.

[0032] In some embodiments of this application, the projection of the sealing part 412 in the first direction is completely located on the cylinder body 1; this arrangement ensures that the machined surface of the sealing part 412 is aligned with the corresponding contact surface of the cylinder body 1, ensuring that there is no misalignment or suspended portion on the surfaces of the sealing part 412 and the cylinder body 1 in contact with each other. This not only reduces processing costs but also ensures the sealing reliability of the compression chamber 21, thereby improving the working efficiency and operational stability of the rotary compressor.

[0033] In some embodiments of this application, the mounting portion 411 includes a central portion 4111 and an edge portion 4112 surrounding the central portion 4111; in the first direction, the size of the edge portion 4112 is larger than the size at the connection between the edge portion 4112 and the central portion 4111; this arrangement makes the edge portion 4112 have a larger size in the first direction and forms an outwardly expanding thickened structure, thereby significantly increasing the contact area between the first end cover 41 and the housing of the rotary compressor, that is, increasing the bonding area of ​​the fixed connection between the first end cover 41 and the housing, and increasing the connection strength and stability between the pump body composed of the cylinder 1, the first end cover 41 and the second end cover 42 and the housing.

[0034] like Figure 4 As shown, specifically in this application, Figure 4 The area selected by the dashed box A1 is the middle part 4111, the area selected by the dashed box A2 is the edge part 4112, and the area selected by the dashed box B is the sealing part 412.

[0035] In some embodiments of this application, the first end cap 41 is connected to the cylinder 1 by bolts 5, and the bolts 5 are located in the middle part 4111. In this embodiment, the bolts 5 are set in the middle area relatively inward of the mounting part 411, so that the fastening force generated by the bolts 5 can directly act on the main joint position between the first end cap 41 and the cylinder 1, ensuring that the sealing part 412 and the cylinder 1 fit more tightly, effectively ensuring the sealing performance of the compression chamber 21.

[0036] It is understandable that if the bolt 5 is located at the edge 4112, the distance between the bolt 5 and the compression chamber 21 will be relatively far, which may result in poor sealing performance of the compression chamber 21.

[0037] In some embodiments of this application, the orthographic projection of the suction port 3 in the first direction is completely located on the first end cover 41. This arrangement ensures that the entire suction port 3 is covered by the first end cover 41 in the first direction, so that when the high-temperature oil-gas mixture discharged from the exhaust port of the first end cover 41 flows through the first end cover 41, the heat exchange path between it and the suction port 3 can be completely blocked by the first end cover 41. This completely isolates the suction port 3 from the high-temperature area of ​​the rotary compressor, thereby minimizing the thermal interference of the high-temperature oil-gas mixture on the low-temperature refrigerant in the suction port 3, and thus improving the refrigeration efficiency of the refrigeration system.

[0038] It should be noted that when the orthographic projection of the air intake 3 in the first direction is completely located on the first end cover 41, the area of ​​the cylinder body 1 where the air intake 3 is provided can be in direct contact with the first end cover 41 or can be spaced apart from the first end cover 41, and no restriction is made here.

[0039] In some embodiments of this application, the portion of the first end cap 41 opposite to the intake port 3 in the first direction contacts the cylinder body 1. This arrangement allows the first end cap 41 to directly contact the area of ​​the cylinder body 1 where the intake port 3 is located, thus physically blocking the heat exchange between the high-temperature oil-gas mixture and the intake port 3. This effectively blocks most of the exhaust heat from being directly or indirectly conducted into the intake port 3, reducing the thermal interference of the high-temperature oil-gas mixture on the low-temperature refrigerant in the intake port 3, thereby improving the refrigeration efficiency of the refrigeration system.

[0040] This application also proposes a refrigeration device, which includes a rotary compressor as described above. Since this refrigeration device adopts all the technical solutions of all the above embodiments, it has at least the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0041] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A rotary compressor, characterized in that, include: A cylinder body has two ends in a first direction, the cylinder body has a cavity and two openings at its two ends communicating with the cavity, and an intake port communicating with the cavity is provided on the side of the cylinder body; and Two sealing end caps, including a first end cap and a second end cap, the first end cap being provided with an exhaust hole, the first end cap and the second end cap being respectively installed at both ends of the cylinder body and covering the two ports of the cylinder body, so as to form a compression chamber with the cylinder body; Wherein, at least a portion of the first end cap covers the area of ​​the cylinder body where the air intake hole is provided, such that the projection of at least a portion of the air intake hole in the first direction falls on the first end cap.

2. The rotary compressor as described in claim 1, characterized in that, At least a portion of the first end cap extends laterally beyond one end of the cylinder body.

3. The rotary compressor as described in claim 2, characterized in that, The periphery of the first end cap extends laterally beyond the periphery of the cylinder body.

4. The rotary compressor as described in claim 3, characterized in that, The first end cap includes a mounting portion and a sealing portion connected sequentially in the first direction, wherein the sealing portion is located between the mounting portion and the cylinder body; On a plane perpendicular to the first direction, the cross-sectional area of ​​the sealing portion is smaller than the cross-sectional area of ​​the mounting portion.

5. The rotary compressor as described in claim 4, characterized in that, The projection of the sealing part in the first direction is entirely located on the cylinder body.

6. The rotary compressor as described in claim 4, characterized in that, The mounting portion includes a central portion and an edge portion surrounding the central portion; In the first direction, the size of the edge portion is larger than the size located at the junction of the edge portion and the middle portion.

7. The rotary compressor as described in claim 6, characterized in that, The first end cap is bolted to the cylinder body, and the bolt is located in the middle.

8. The rotary compressor as described in claim 1, characterized in that, The orthographic projection of the air intake in the first direction is completely located on the first end cap.

9. The rotary compressor as described in claim 1, characterized in that, The portion of the first end cap opposite the air intake in the first direction contacts the cylinder body.

10. A refrigeration device, characterized in that, Including the rotary compressor as described in any one of claims 1 to 9.

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