Compression assembly, compressor and heat exchange system

Abstract

The invention provides a compression assembly, a compressor and a heat exchange system. The compression assembly includes: a housing; a separator; a rotor pair; a second compression structure; the rotor pair comprises a male rotor and a female rotor which are meshed with each other, the male rotor is connected with a power mechanism, and the female rotor is connected with the second compression structure. According to the compression assembly, the compressor and the heat exchange system, one power mechanism is used for driving the rotor pair and the second compression structure at the same time, it is guaranteed that the rotor pair and the second compression structure work synchronously, it is avoided that in the prior art, the balance and energy efficiency are affected due to asynchronous work of compression parts, and the reliability of the compression assembly and the compressor is improved; the male rotor of the rotor pair is connected with the power mechanism, the female rotor of the rotor pair is connected with the second compression structure, the first refrigerating working medium between the male rotor and the female rotor can be used for buffering, damage to the compression assembly is avoided, and the reliability and stability of the compression assembly are further improved.

Description

Technical Field

[0001] The invention relates to the field of compression technology, in particular to a compression component, a compressor and a heat exchange system. Background Art

[0002] A cascade refrigeration system is a technology that combines two or more refrigeration cycles with different temperature ranges to achieve lower temperature refrigeration. Cascade refrigeration systems are very effective in low-temperature applications, especially in situations where extremely low temperatures need to be reached. This system usually consists of a high-temperature cycle and a low-temperature cycle, which work together to achieve a wider temperature range and higher refrigeration efficiency. Therefore, a cascade compressor usually requires two or more compressors of different types, one for the high-temperature cycle and the other for the low-temperature cycle. However, different compression parts in the cascade refrigeration system in the prior art are driven by different motors, resulting in operating differences between different compression parts, making the cascade refrigeration system unbalanced, which in turn causes abnormal problems such as reduced energy, equipment damage, decreased system stability, and increased safety risks in the cascade refrigeration system, which seriously affects the reliability of the cascade refrigeration system. Summary of the invention

[0003] In order to solve the technical problem in the prior art that inconsistent operation of compression components affects reliability, a compression assembly, a compressor and a heat exchange system are provided which utilize a power mechanism to simultaneously drive a rotor pair and a second compression structure to ensure reliability.

[0004] A compression assembly comprising:

[0005] case;

[0006] A partition, the partition is disposed in the shell, and the partition divides the shell into a first compression chamber and a second compression chamber;

[0007] a rotor pair, wherein the rotor pair is disposed in the first compression chamber;

[0008] a second compression structure, the second compression structure being disposed in the second compression chamber;

[0009] The rotor pair includes a male rotor and a female rotor meshing with each other, the male rotor is connected to a power mechanism, and the female rotor is connected to the second compression structure.

[0010] The rotor pair compresses the first refrigerant, and the second compression structure compresses the second refrigerant.

[0011] The first refrigerant includes a refrigerant, and the second refrigerant includes carbon dioxide.

[0012] The compression assembly further includes a sealing structure. A transmission shaft is disposed between the female rotor and the second compression structure. The sealing structure is disposed at a position where the transmission shaft passes through the partition.

[0013] The compression assembly further includes a transmission structure, and the female rotor is detachably connected to the second compression structure via the transmission structure.

[0014] The second compression structure includes a crank, a piston cylinder and a piston. The piston is movably arranged in the piston cylinder, and the female rotor is connected to the piston through the crank.

[0015] The number of the piston cylinders is at least two, the pistons correspond to the piston cylinders one by one, and all the pistons are connected to the crank.

[0016] The first compression chamber is provided with an air intake port and an air exhaust port. The power mechanism is arranged in the first compression chamber, and the power mechanism is located between the air intake port and the rotor pair.

[0017] A compressor comprises the above-mentioned compression assembly.

[0018] A heat exchange system comprises the above-mentioned compression assembly or the above-mentioned compressor.

[0019] The compression assembly, compressor and heat exchange system provided by the present invention utilize a power mechanism to simultaneously drive the rotor pair and the second compression structure, thereby ensuring that the rotor pair and the second compression structure work synchronously, avoiding the impact of asynchronous operation between the compression components in the prior art on balance and energy efficiency, and improving the reliability of the compression assembly and the compressor. In addition, the male rotor of the rotor pair is connected to the power mechanism, while the female rotor is connected to the second compression structure, so that the first refrigerant between the male rotor and the female rotor can be used for buffering, thereby avoiding damage to the compression assembly, thereby further improving the reliability and stability of the compression assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of a compression assembly provided in an embodiment of the present invention;

[0021] Figure 2 Another schematic diagram of the structure of a compression assembly provided by an embodiment of the present invention;

[0022] In the figure:

[0023] 1. Shell; 2. Partition; 11. First compression chamber; 12. Second compression chamber; 31. Male rotor; 32. Female rotor; 4. Power mechanism; 51. Crank; 52. Piston cylinder; 53. Piston; 13. Inlet port; 14. Exhaust port. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0027] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] A cascade refrigeration system is a technology that combines two or more refrigeration cycles with different temperature ranges to achieve lower temperature refrigeration. Cascade refrigeration systems are very effective in low-temperature applications, especially in situations where extremely low temperatures need to be reached. This system usually consists of a high-temperature cycle and a low-temperature cycle, which work together to achieve a wider temperature range and higher refrigeration efficiency. Therefore, a cascade compressor usually requires two or more compressors of different types, one for the high-temperature cycle and the other for the low-temperature cycle. However, different compression parts in the cascade refrigeration system in the prior art are driven by different motors, resulting in operating differences between different compression parts, making the cascade refrigeration system unbalanced, which in turn causes abnormal problems such as reduced energy, equipment damage, decreased system stability, and increased safety risks in the cascade refrigeration system, which seriously affects the reliability of the cascade refrigeration system.

[0030] To this end, the present application provides a Figure 1 and Figure 2 The compression assembly shown includes: a shell 1; a partition 2, the partition 2 is arranged in the shell 1, and the partition 2 divides the shell 1 into a first compression chamber 11 and a second compression chamber 12; a rotor pair, the rotor pair is arranged in the first compression chamber 11; a second compression structure, the second compression structure is arranged in the second compression chamber 12; the rotor pair includes a male rotor 31 and a female rotor 32 that mesh with each other, the male rotor 31 is connected to the power mechanism 4, and the female rotor 32 is connected to the second compression structure. The rotor pair and the second compression structure are driven by a power mechanism 4 at the same time to ensure that the rotor pair and the second compression structure work synchronously, avoiding the asynchronous operation of the compression components in the prior art to affect the balance and energy efficiency, and improving the reliability of the compression assembly and the compressor. In addition, the male rotor 31 of the rotor pair is connected to the power mechanism 4, and the female rotor 32 is connected to the second compression structure, so that the first refrigerant between the male rotor 31 and the female rotor 32 can be used for buffering, avoiding damage to the compression assembly, and further improving the reliability and stability of the compression assembly.

[0031] When the compression assembly is working, the power mechanism 4 outputs power, the male rotor 31 receives the power and rotates, the female rotor 32 also rotates, and at the same time drives the second compression structure to work, thereby ensuring that the rotor pair and the second compression structure work synchronously, avoiding the asynchronous operation of the compression components in the prior art and affecting the balance and energy efficiency, and improving the reliability of the compression assembly and the compressor. Preferably, the rotor pair constitutes the high-temperature circulation part of the compression assembly, and the second compression structure constitutes the low-temperature circulation part of the compression assembly. Among them, the rotation speed of the power mechanism 4 and the rotation speed of the second compression structure are adjusted by the gear ratio of the rotor pair. For example, the gear ratio of the rotor pair is 8:4. When the rotation speed of the power mechanism 4 is 3000 rpm, the rotation speed of the second compression structure is 1500 rpm.

[0032] Furthermore, the rotor pair compresses the first refrigerant, and the second compression structure compresses the second refrigerant. That is, the compression assembly can compress two different refrigerants at the same time, making full use of the different boiling points of different refrigerants to improve the heat exchange efficiency and heat exchange range of the compression assembly.

[0033] Optionally, the first refrigerant includes a refrigerant, such as R134a, R507A, etc., and the second refrigerant includes carbon dioxide.

[0034] Since the rotor pair and the second compression structure compress different refrigerants, the compression assembly also includes a sealing structure. A transmission shaft is arranged between the female rotor 32 and the second compression structure. The sealing structure is arranged at the position where the transmission shaft passes through the partition 2. The sealing structure is used for sealing to ensure the relative sealing of the first compression chamber 11 and the second compression chamber 12.

[0035] The compression assembly further includes a transmission structure, and the female rotor 32 is detachably connected to the second compression structure through the transmission structure. The transmission structure is used to realize the quick connection or disassembly of the female rotor 32 and the second compression structure, and the different working states of the compression assembly can be adjusted by adjusting the transmission structure, so that the rotor pair and the second compression structure can work at the same time, or only the rotor pair can work.

[0036] Preferably, the transmission structure includes a transmission, and the female rotor 32 is connected to the second compression structure through the transmission. The transmission is used to adjust the rotation speed, and the rotation speed of the second compression structure is further adjusted to ensure the working reliability of the second compression structure.

[0037] As an embodiment, the second compression structure includes a crank 51, a piston cylinder 52 and a piston 53, wherein the piston 53 is movably disposed in the piston cylinder 52, and the female rotor 32 is connected to the piston 53 via the crank 51. The crank 51 drives the piston 53 to reciprocate in the piston cylinder 52, thereby compressing the refrigerant in the piston cylinder 52.

[0038] The number of the piston cylinders 52 is at least two, the pistons 53 correspond to the piston cylinders 52 one by one, and all the pistons 53 are connected to the crank 51. The compression amount of the second compression structure is increased by using multiple pistons 53 and piston cylinders 52, and the force of the pistons 53 during the compression process can also be balanced to ensure the operating reliability of the second compression structure. Preferably, the number of the piston cylinders 52 is an even number, and the operating states of the pistons 53 in two adjacent piston cylinders 52 are completely opposite, so as to ensure the force balance of the crankshaft and the smooth operation of the second compression structure.

[0039] The first compression chamber 11 is provided with an air intake port 13 and an air exhaust port 14, and the power mechanism 4 is provided in the first compression chamber 11, and the power mechanism 4 is located between the air intake port 13 and the rotor pair. By arranging the power mechanism 4 between the air intake port 13 and the rotor pair, the refrigerant sucked in by the air intake port 13 can dissipate heat for the power mechanism 4, thereby ensuring the working reliability of the power mechanism 4.

[0040] The power mechanism 4 may be arranged between the rotor pair and the second compression structure, or may be arranged on a side of the rotor pair away from the second compression structure, which is specifically determined according to the position of the air intake port 13 .

[0041] A compressor comprises the above-mentioned compression assembly.

[0042] A heat exchange system comprises the above-mentioned compression assembly or the above-mentioned compressor.

[0043] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A compression assembly, characterized in that: include: Housing (1); a partition (2), wherein the partition (2) is arranged in the shell (1), and the partition (2) divides the shell (1) into a first compression chamber (11) and a second compression chamber (12); A rotor pair, wherein the rotor pair is arranged in the first compression chamber (11); a second compression structure, the second compression structure being arranged in the second compression chamber (12); The rotor pair comprises a male rotor (31) and a female rotor (32) meshing with each other, the male rotor (31) being connected to a power mechanism (4), and the female rotor (32) being connected to the second compression structure.

2. The compression assembly according to claim 1, characterized in that: The rotor pair compresses the first refrigerant, and the second compression structure compresses the second refrigerant.

3. The compression assembly according to claim 2, characterized in that: The first refrigerant includes a refrigerant, and the second refrigerant includes carbon dioxide.

4. The compression assembly according to claim 1, characterized in that: The compression assembly further comprises a sealing structure, a transmission shaft is arranged between the female rotor (32) and the second compression structure, and the sealing structure is arranged at the position where the transmission shaft passes through the partition (2).

5. The compression assembly according to claim 1, characterized in that: The compression assembly also includes a transmission structure, and the female rotor (32) is detachably connected to the second compression structure via the transmission structure.

6. The compression assembly according to claim 1, characterized in that: The second compression structure comprises a crank (51), a piston cylinder (52) and a piston (53); the piston (53) is movably arranged in the piston cylinder (52); and the female rotor (32) is connected to the piston (53) via the crank (51).

7. The compression assembly according to claim 6, characterized in that: The number of the piston cylinders (52) is at least two, the pistons (53) correspond to the piston cylinders (52) one by one, and all the pistons (53) are connected to the crank (51).

8. The compression assembly according to claim 1, characterized in that: The first compression chamber (11) is provided with an air intake port (13) and an air exhaust port (14); the power mechanism (4) is arranged in the first compression chamber (11), and the power mechanism (4) is located between the air intake port (13) and the rotor pair.

9. A compressor, characterized in that: A compression assembly comprising the compression assembly of any one of claims 1 to 8.

10. A heat exchange system, characterized in that: The invention comprises the compression assembly according to any one of claims 1 to 8 or the compressor according to claim 9.

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