Parallel open screw compressor unit

Abstract

The application provides a parallel open screw compressor unit, which comprises a chassis, a compressor, a motor, an oil separator, a suction manifold, a control cabinet, an economizer, an oil cooler and an oil filter, the chassis has an upper partition space and a lower partition space, the lower partition space is used for placing the oil cooler, the oil filter, the oil separator and the economizer, the upper partition space is provided with a plurality of groups of compressors and motors, the control cabinet is installed on one side of the chassis and electrically connected with the compressor, the motor and the oil separator, and the plurality of groups of compressors are communicated with the suction manifold. The suction manifold is arranged, so that the structure of the unit is simplified and the installation workload of the unit is greatly reduced.

Description

Technical Field

[0001] This application relates to the field of refrigeration equipment, and in particular to a parallel open screw compressor unit. Background Technology

[0002] In the field of refrigeration equipment, the efficient and stable operation of refrigeration systems is of paramount importance. As the core component of refrigeration systems, the design and configuration of compressors and related components have a significant impact on the performance, ease of installation, and maintenance costs of the entire refrigeration equipment.

[0003] Currently, some existing refrigeration equipment has design flaws that require improvement. For example, regarding oil separation and compressor placement, when using a horizontal oil separator, the compressor needs to be placed at a relatively high position to meet the oil separation requirements. This layout results in a larger amount of refrigerant oil being charged, which not only increases costs but may also negatively impact the operating efficiency and stability of the refrigeration system.

[0004] In terms of ease of installation, the existing equipment does not integrate the intake manifold assembly or the economizer. This necessitates the separate installation of the intake manifold and economizer during on-site installation, significantly increasing the workload, extending the construction period, and also raising the possibility of errors during installation.

[0005] In terms of equipment maintenance, each compressor is equipped with a small oil filter. Although it can filter the refrigeration oil to a certain extent, the small oil filter has a relatively small filtration capacity and requires more frequent inspection and replacement, which increases maintenance costs and labor intensity.

[0006] Furthermore, the compressor does not come with a built-in intake filter, requiring an additional intake filter to be added to the system. This not only increases the installation space requirements and makes the equipment layout more complex, but also increases the installation difficulty and demands higher technical skills from the installers.

[0007] In summary, existing refrigeration equipment has shortcomings in terms of oil separation component layout, installation integration, maintenance convenience, and filter configuration. There is an urgent need for a refrigeration equipment design that can solve the above problems in order to improve equipment performance and reduce installation and maintenance costs. Utility Model Content

[0008] To achieve the above objectives, this application proposes a parallel open screw compressor unit, comprising: a base frame, compressors, motors, oil separators, a suction main pipe, a control cabinet, an economizer, an oil cooler, and an oil filter. The base frame has an upper partition space and a lower partition space. The lower partition space is used to house the oil cooler, oil filter, oil separator, and economizer. The upper partition space houses multiple compressors and motors. The control cabinet is mounted on one side of the base frame and is electrically connected to the compressors, motors, and oil separator. All compressors are connected to the suction main pipe.

[0009] The above technical solution adopts a layered base frame structure (the upper partition space is used to arrange the compressor and motor, and the lower partition space integrates the oil cooler, oil filter, oil separator and economizer). The control cabinet is integrated on one side of the base frame, and multiple compressors are connected in parallel to the intake manifold, thereby simplifying the intake pipeline layout, reducing pressure drop and leakage risks, and improving intake uniformity.

[0010] It also includes: a servo cover; the motor is connected to the compressor through the servo cover.

[0011] Through the above technical solutions, the servo cover may provide high-precision transmission connections (such as servo couplings), reduce vibration transmission between the motor and the compressor, reduce mechanical losses, and extend equipment life.

[0012] It also includes: exhaust valve assembly and intake valve assembly; the exhaust valve assembly is connected to the oil separator; multiple compressors are equipped with intake valve assemblies, and each intake valve assembly is connected to the intake manifold.

[0013] It also includes: an oil supply pipe assembly; the oil supply pipe assembly is located in the lower partition space of the base frame, with the inlet end of the oil supply pipe assembly connected to an oil filter and the outlet end connected to a compressor.

[0014] Through the above technical solutions, the oil supply pipeline is centrally arranged in the lower space, shortening the oil path length from the oil filter to the compressor, reducing pressure loss along the path, and improving lubrication and cooling efficiency.

[0015] It also includes: a throttling component and a liquid supply component; the throttling component and the liquid supply component are respectively connected to the economizer, so that the liquid flowing out of the economizer has two liquid paths.

[0016] The above-mentioned technical means enable flow regulation of the two channels to adapt to the operating requirements under different loads or ambient temperatures.

[0017] Specifically, the economizer is a plate-shell type economizer.

[0018] Specifically, the oil cooler is a plate-and-shell type oil cooler.

[0019] Specifically, the oil separator is a vertical oil separator.

[0020] Compared with the prior art, the advantages of this application are:

[0021] (1) Adopting advanced factory prefabrication parallel start-up technology, the unit completes overall assembly and performance testing before leaving the factory;

[0022] (2) The innovative application of plate and shell heat exchanger design significantly reduces the refrigerant charge through a highly efficient and compact heat transfer structure, thereby reducing the weight of the equipment. This not only reduces the cost of refrigerant use but also optimizes the convenience of transportation and installation as well as the storage space required.

[0023] (3) The compressor integrates an oil circuit system, which reduces the risk of failure caused by loose or leaking pipe interfaces, achieves more stable operation with fewer connection points, and extends the equipment life cycle;

[0024] (4) The innovative design integrates the intake filter into the compressor body structure. Through modular built-in design, no additional external filter components are required, which directly saves installation space and significantly reduces the complexity of installation layout. Attached Figure Description

[0025] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and, together with the description, serve to explain the principles of this application. Other embodiments and many anticipated advantages of these embodiments will be readily recognized as they become better understood through reference to the following detailed description. Elements in the drawings are not necessarily to scale. The same reference numerals refer to corresponding similar parts.

[0026] Figure 1 This is a front view of a parallel open screw compressor unit according to an embodiment of this application;

[0027] Figure 2 This is a side view of a parallel open screw compressor unit according to an embodiment of this application;

[0028] Figure 3 This is a top view of a parallel open screw compressor unit according to an embodiment of this application.

[0029] The meanings of the numbers in the diagram are as follows: 1. Compressor; 2. Servo cover; 3. Motor; 4. Oil separator; 5. Exhaust valve assembly; 6. Control cabinet; 7a. Suction main pipe; 7b. Suction valve assembly; 8. Economizer; 9. Oil cooler; 10. Oil filter; 11. Oil supply pipe assembly; 12. Base frame; 13. Throttling assembly; 14. Liquid supply assembly. Detailed Implementation

[0030] In the following detailed description, reference is made to the accompanying drawings, which form part of the detailed description and illustrate illustrative specific embodiments in which the present application may be practiced. In this regard, directional terms such as “top,” “bottom,” “left,” “right,” “up,” “down,” etc., are used with reference to the orientation of the described figures. Because components of the embodiments can be positioned in several different orientations, directional terms are used for illustrative purposes and are by no means limiting. It should be understood that other embodiments may be utilized or logical changes may be made without departing from the scope of the present application. Therefore, the following detailed description should not be taken in a limiting sense, and the scope of the present application is defined by the appended claims.

[0031] like Figures 1 to 3 The embodiment shown includes a parallel open screw compressor unit comprising: a base frame 12, compressors 1, motors 3, oil separators 4, a suction main pipe 7a, a control cabinet 6, an economizer 8, an oil cooler 9, and an oil filter 10. The base frame 12 has an upper partition space and a lower partition space. The lower partition space is used to house the oil cooler 9, the oil filter 10, the oil separator 4, and the economizer 8. The upper partition space houses multiple compressors 1 and motors 3. The control cabinet 6 is mounted on one side of the base frame 12 and is electrically connected to the compressors 1, motors 3, and oil separator 4. All multiple compressors 1 are connected to the suction main pipe 7a.

[0032] This innovative application integrates the intake filter into the compressor body structure. Through a modular, built-in design, it eliminates the need for additional external filter components, directly saving installation space and significantly reducing installation layout complexity. Simultaneously, it eliminates the need for separate filter installation and piping connections, simplifying the installation process, greatly shortening the construction cycle, reducing reliance on specialized installation techniques, and effectively improving installation efficiency and convenience.

[0033] Specifically, motor 3 is connected to compressor 1 via servo cover 2.

[0034] Specifically, the exhaust valve assembly 5 is connected to the oil separator 4; multiple compressors 1 are each equipped with a suction valve assembly 7b, and each suction valve assembly 7b is connected to the suction main pipe 7a.

[0035] Specifically, the oil supply pipe assembly 11 is located in the lower partition space of the base frame 12. The inlet end of the oil supply pipe assembly 11 is connected to the oil filter 10, and the outlet end is connected to the compressor 1.

[0036] Specifically, the throttling component 13 and the liquid supply component 14 are respectively connected to the economizer 8, so that the liquid flowing out of the economizer 8 has two liquid paths.

[0037] Specifically, the economizer 8 is a plate-shell type economizer 8.

[0038] Specifically, the oil cooler 9 is a plate-shell type oil cooler 9.

[0039] The above technical solution innovatively applies a plate-and-shell heat exchanger design. Through a highly efficient and compact heat transfer structure, it significantly reduces the amount of refrigerant required and simultaneously reduces the weight of the equipment. This not only reduces the cost of refrigerant use but also optimizes the convenience of transportation and installation as well as the storage space required.

[0040] Specifically, the oil separator 4 is a vertical oil separator. Through innovative integration of the suction filter into the compressor body structure, and its modular built-in design, it eliminates the need for additional external filter components, directly saving installation space and significantly reducing installation layout complexity. The reduced amount of refrigerant oil not only lowers initial purchase costs but also reduces subsequent maintenance expenses, achieving optimization of the entire lifecycle cost.

[0041] To better illustrate this application, taking the above embodiment as an example, the gas-liquid path in this embodiment is as follows:

[0042] (1) Refrigerant gas passage: The refrigerant gas in the suction manifold 7a enters each compressor from the suction valve assembly. After being compressed by the compressor, it is discharged to the oil separator and separated in the oil separator. The separated refrigerant gas is discharged to the external condenser (not shown in the figure) through the exhaust valve assembly connected to the oil separator.

[0043] (2) Refrigeration oil liquid passage: After the refrigeration oil in the oil separator 4 is cooled by the oil cooler 9, it is filtered by the oil filter 10 and then pumped to the compressor 1 through the oil supply pipe assembly 11;

[0044] (3) Refrigerant liquid passage: Refrigerant liquid flows from the external liquid receiver (not shown in the figure) to the economizer 8. The refrigerant flowing into the economizer 8 has two liquid passages. The first passage is throttled by the throttling component 13 and flows into the economizer 8 to complete the heat exchange, and then replenishes the compressor 1. The second passage does not go through the throttling component 13 and is directly subcooled by the liquid supply component 14 connected to the economizer 8.

[0045] It is obvious that those skilled in the art can make various modifications and alterations to the embodiments of this application without departing from the spirit and scope of this application. In this way, this application also aims to cover such modifications and alterations if they fall within the scope of the claims and their equivalents. The word "comprising" does not exclude the presence of other elements or steps not listed in the claims. The simple fact that certain measures are described in mutually different dependent claims does not indicate that a combination of these measures cannot be used for profit. Any reference numerals in the claims should not be considered limiting in scope.

Claims

1. A parallel open-type screw compressor unit, comprising: The system comprises a base frame, a compressor, a motor, an oil separator, a main intake pipe, a control cabinet, an economizer, an oil cooler, and an oil filter. The base frame has an upper partition space and a lower partition space. The lower partition space is used to house the oil cooler, oil filter, oil separator, and economizer. The upper partition space houses multiple sets of the compressors and the motor. The control cabinet is mounted on one side of the base frame and is electrically connected to the compressors, motor, and oil separator. All sets of compressors are connected to the main intake pipe.

2. The parallel open screw compressor unit according to claim 1, characterized in that, Also includes: Servo cover; the motor is connected to the compressor through the servo cover.

3. A parallel open screw compressor unit according to claim 1, characterized in that, Also includes: An exhaust valve assembly and an intake valve assembly; the exhaust valve assembly is connected to the oil separator; multiple compressors are each equipped with the intake valve assembly, and each intake valve assembly is connected to the intake manifold.

4. A parallel open screw compressor unit according to claim 1, characterized in that, Also includes: Oil supply pipe assembly; the oil supply pipe assembly is located in the lower partition space of the base frame, the inlet end of the oil supply pipe assembly is connected to the oil filter, and the outlet end is connected to the compressor.

5. A parallel open screw compressor unit according to claim 1, characterized in that, Also includes: A throttling component and a liquid supply component; the throttling component and the liquid supply component are respectively connected to the economizer, so that the liquid flowing out of the economizer has two liquid paths.

6. A parallel open screw compressor unit according to claim 1, characterized in that, The economizer is a plate-shell type economizer.

7. A parallel open screw compressor unit according to claim 1, characterized in that, The oil cooler is a plate-shell type oil cooler.

8. A parallel open screw compressor unit according to claim 1, characterized in that, The oil separator is a vertical oil separator.

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