Supercooling heat regeneration device and centrifugal compressor unit

Abstract

The utility model discloses a supercooling heat regeneration device and a centrifugal compressor unit. The supercooling heat regeneration device comprises a barrel and a pipeline, the pipeline penetrates through the barrel, the two ends of the pipeline are exposed out of the barrel, and a first medium of the centrifugal compressor unit flows into the economizer from the condenser through the pipeline; the cylinder body is provided with an inlet and an outlet which are communicated with each other, a plurality of baffle plates are also arranged in the cylinder body, the baffle plates are arranged between the inner wall of the cylinder body and the outer wall of the pipeline, the inlet is communicated with the condenser, and the outlet is communicated with the economizer; a second medium flows into the compressor from the evaporator through the barrel, and the first medium and the second medium exchange heat in the barrel. The condenser and the economizer are communicated through the pipeline, and meanwhile the evaporator and the compressor are communicated through the barrel, so that heat exchange can be conducted between the first medium and the second medium in the supercooling heat regeneration device, and supercooling of the first medium and heating of the second medium are achieved. The supercooling heat regeneration device can improve the supercooling degree of the first medium, use of a calandria can be avoided, and the energy efficiency of the centrifugal compressor unit can be improved.

Description

Technical Field

[0001] This utility model relates to the field of compressors, and in particular to a subcooling regeneration device and a centrifugal compressor unit. Background Technology

[0002] Centrifugal compressor units are common equipment used for large refrigeration capacities. Centrifugal compressor units typically require a tube-type heat exchanger for subcooling and heat recovery. This approach has the following disadvantages: 1. The tubes of a tube-type heat exchanger are mostly made of copper tubes, resulting in a large number of tubes, multiple manufacturing processes, heavy weight, and high cost; 2. Due to the arrangement of multiple sets of slender copper tubes, the high flow velocity and large difference in flow velocity between the inside and outside of the tubes can easily lead to vibration and noise, and even the risk of tube rupture; 3. Tube-type heat exchangers also suffer from low condensation heat exchange efficiency. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the above-mentioned defects of the existing centrifugal compressor unit in the tube-type heat exchanger, which has a large number of tubes, heavy weight and high cost, and to provide a subcooling regeneration device and a centrifugal compressor unit.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] A subcooling and reheating device is provided in a centrifugal compressor unit. The subcooling and reheating device includes a cylinder and pipes. The pipes pass through the cylinder and both ends of the pipes protrude from the cylinder. A first medium from the centrifugal compressor unit flows from the condenser of the centrifugal compressor unit into the economizer of the centrifugal compressor unit through the pipes. The cylinder has a connected inlet and outlet. The cylinder also has multiple baffles, which are located between the inner wall of the cylinder and the outer wall of the pipes. The inlet is connected to the evaporator of the centrifugal compressor unit, and the outlet is connected to the compressor of the centrifugal compressor unit. A second medium from the centrifugal compressor unit flows from the evaporator into the compressor through the cylinder. The first medium and the second medium exchange heat in the cylinder.

[0006] In this solution, by employing the above structure, the condenser and economizer of the centrifugal compressor unit are connected by pipes, while the evaporator and compressor of the centrifugal compressor unit are connected by a cylinder. This allows the first and second media to exchange heat in the subcooling and reheating device, thereby achieving subcooling of the first media and heating of the second media. The subcooling and reheating device can increase the subcooling degree of the first media, eliminate the need for piping, improve the energy efficiency of the centrifugal compressor unit, and effectively reduce costs.

[0007] Optionally, the pipe extends through the cylinder along the axial direction of the cylinder, and the axis of the pipe coincides with the axis of the cylinder.

[0008] Optionally, the inlet and the outlet are located at both ends of the cylinder, and the inlet and the outlet are located on both sides of the pipe.

[0009] Optionally, the baffle is semi-circular, the outer wall of the baffle is in contact with the inner wall of the cylinder, and the inner wall of the baffle is in contact with the outer wall of the pipe.

[0010] Optionally, multiple baffles are arranged at intervals.

[0011] Optionally, the inlet is located adjacent to one end of the pipe into which the first medium flows.

[0012] Optionally, the outlet is located adjacent to one end of the pipe from which the first medium flows out.

[0013] A centrifugal compressor unit, the centrifugal compressor unit including the subcooling and reheating device as described above.

[0014] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this utility model.

[0015] The positive and progressive effects of this utility model are as follows:

[0016] This invention utilizes a pipeline to connect the condenser and economizer of a centrifugal compressor unit, and a cylinder to connect the evaporator and compressor of the same unit. This allows the first and second media to exchange heat within a subcooling and reheating device, thereby achieving subcooling of the first media and heating of the second media. The subcooling and reheating device increases the subcooling degree of the first media, eliminates the need for piping, improves the energy efficiency of the centrifugal compressor unit, and effectively reduces costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a centrifugal compressor unit according to an embodiment of the present invention.

[0018] Figure 2 for Figure 1 A schematic diagram of the subcooling and regeneration device in a centrifugal compressor unit.

[0019] Figure 3 for Figure 2 A cross-sectional schematic diagram of the subcooling and reheating device.

[0020] Explanation of reference numerals in the attached figures:

[0021] Centrifugal compressor unit 100

[0022] Compressor 11

[0023] Condenser 12

[0024] Economy 13

[0025] Evaporator 14

[0026] Subcooling and reheating device 20

[0027] Cylinder 21

[0028] Entrance 211

[0029] Export 212

[0030] Baffle 213

[0031] Pipeline 22 Detailed Implementation

[0032] The present invention will be described more clearly and completely below by way of embodiments and in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0033] like Figures 1-3 As shown, this embodiment includes a subcooling and reheating device 20 and a centrifugal compressor unit 100. The subcooling and reheating device 20 is used in the centrifugal compressor unit 100.

[0034] exist Figure 2 In the centrifugal compressor unit 100, a subcooling and heat recovery device 20 is installed. The subcooling and heat recovery device 20 includes a cylinder 21 and a pipe 22. The pipe 22 passes through the cylinder 21, and both ends of the pipe 22 are exposed outside the cylinder 21. The first medium of the centrifugal compressor unit 100 flows from the condenser 12 of the centrifugal compressor unit 100 into the economizer 13 of the centrifugal compressor unit 100 through the pipe 22. The cylinder 21 has a connected inlet 211 and an outlet 212. A plurality of baffles 213 are also provided inside the cylinder 21. The baffles 213 are located between the inner wall of the cylinder 21 and the outer wall of the pipe 22. The inlet 211 is connected to the evaporator 14 of the centrifugal compressor unit 100, and the outlet 212 is connected to the compressor 11 of the centrifugal compressor unit 100. The second medium of the centrifugal compressor unit 100 flows from the evaporator 14 into the compressor 11 through the cylinder 21. The first medium and the second medium exchange heat inside the cylinder 21. The centrifugal compressor unit 100 is connected to its condenser 12 and economizer 13 via pipe 22, and to its evaporator 14 and compressor 11 via cylinder 21. This allows the first and second media to exchange heat in the subcooling and reheating device 20, thereby achieving subcooling of the first media and heating of the second media. The subcooling and reheating device 20 increases the subcooling degree of the first media, eliminates the need for piping, improves the energy efficiency of the centrifugal compressor unit 100, and effectively reduces costs.

[0035] exist Figure 1 In the process, the inlet 211 of the subcooling device 20 is also connected to the condenser 12, and the outlet 212 of the subcooling device 20 is also connected to the economizer 13.

[0036] The subcooling and reheating device 20 can achieve efficient subcooling. By adding a subcooling and reheating device 20 between the condenser 12 and the economizer 13, the subcooling of the refrigerant can be further improved. The subcooling and reheating device 20 can easily meet this requirement.

[0037] The subcooling and reheating device 20 has a simple structure and can reduce costs. The external subcooling and reheating device 20 uses a commonly used heat-conducting metal material to design a baffle plate 213 instead of a pipe. The structure is simple, the heat exchange area is increased, the heat exchange efficiency is improved, and the cost is also greatly reduced.

[0038] The subcooling and reheating device 20 is safe and reliable. Due to the use of baffles 213, the flow cross-sectional area of ​​the second medium is greatly increased, which can reduce the flow velocity of the second medium, eliminate vibration, and eliminate the risk of pipe rupture, making it safe and reliable.

[0039] In one embodiment, the pipe 22 extends through the cylinder 21 along the axial direction of the cylinder 21, and the axis of the pipe 22 coincides with the axis of the cylinder 21.

[0040] exist Figure 2 In the middle, the inlet 211 and the outlet 212 are located at the two ends of the cylinder 21, and the inlet 211 and the outlet 212 are located on both sides of the pipe 22.

[0041] The baffle 213 is semi-circular in shape. The outer wall of the baffle 213 is in contact with the inner wall of the cylinder 21, and the inner wall of the baffle 213 is in contact with the outer wall of the pipe 22. Multiple baffles 213 are arranged at intervals. In this example, a total of 6 baffles 213 are provided.

[0042] Inlet 211 is located near one end of the first medium inflow pipe 22. Outlet 212 is located near one end of the first medium outflow pipe 22.

[0043] The subcooling and reheating device 20 includes a cylinder 21, a pipe 22 for the flow of a first medium, an inlet 211 for a second medium, and an outlet 212 for a second medium. The first medium and the second medium are separated into two independent compartments by the pipe 22. The second medium enters the cylinder 21 from the inlet 211, and after being dispersed and slowed down by the baffle 213 in the cylinder 21, it flows out from the outlet 212.

[0044] The shell contains a baffle plate 213. The baffle plate 213 changes the flow direction of the second medium and reduces the flow velocity of the second medium, so that the first medium and the second medium can fully exchange heat in the shell 21, achieving the effect of subcooling and reheating.

[0045] In one implementation, the pipe 22 can be made of Q235A, 20#, or 45# seamless steel pipe, and is welded to the cylinder 21; the cylinder 21 can also be made of Q235A, 20#, or 45# seamless steel pipe. A baffle 213 is welded to the cylinder 21. The baffle 213 can also be made of Q235A, 20#, or 45# seamless steel pipe. The welding of the pipe 22 to the cylinder 21 allows the second medium to flow in a curved pattern within the cylinder 21, increasing the cross-sectional area and reducing the flow velocity.

[0046] The centrifugal compressor unit 100 employs a subcooling and reheating device 20. This device subcools the liquid refrigerant (the first medium) output from the bottom of the condenser 12, while heating the oil and refrigerant liquid-vapor mixture output from the bottom of the evaporator 14 (the second medium). The subcooling and reheating device 20 increases the subcooling degree of the refrigerant liquid, thereby improving the energy efficiency of the centrifugal compressor unit 100 and effectively reducing costs, thus achieving energy conservation and environmental protection.

[0047] This example also includes a centrifugal compressor unit 100, which includes the subcooling and reheating device 20 as described above.

[0048] Combination Figure 1 The centrifugal compressor unit 100 includes a compressor 11, a condenser 12, a subcooling and reheating device 20, an economizer 13, and an evaporator 14. A first medium originates from the compressor 11, passes through the condenser 12, and after condensation, exits from the bottom of the condenser 12. The liquid outlet is subcooled by the subcooling and reheating device 20, then passes through a throttling device before entering the economizer 13, and finally enters the evaporator 14. A second medium flows from the bottom of the evaporator 14 into the subcooling and reheating device 20, is superheated, and returns to the compressor 11. The first and second media exchange heat.

[0049] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A subcooling regenerative device, characterized by, The supercooling regenerative device is arranged in a centrifugal compressor unit, and comprises a cylinder and a pipeline, the pipeline is arranged in the cylinder, and both ends of the pipeline are exposed to the cylinder, a first medium of the centrifugal compressor unit flows from a condenser of the centrifugal compressor unit to an economizer of the centrifugal compressor unit through the pipeline; the cylinder has an inlet and an outlet connected with each other, and a plurality of baffles are arranged in the cylinder, the baffles are arranged between the inner wall of the cylinder and the outer wall of the pipeline, the inlet is connected with an evaporator of the centrifugal compressor unit, and the outlet is connected with a compressor of the centrifugal compressor unit; a second medium of the centrifugal compressor unit flows from the evaporator to the compressor through the cylinder, and the first medium and the second medium exchange heat in the cylinder.

2. The subcooling regenerator as set forth in claim 1 wherein, The pipeline penetrates the cylinder along the axial direction of the cylinder, and the axis of the pipeline coincides with the axis of the cylinder.

3. The subcooling regenerator as set forth in claim 1 wherein, The inlet and the outlet are respectively arranged at both ends of the cylinder, and the inlet and the outlet are respectively arranged on both sides of the pipeline.

4. The subcooling regenerator as set forth in claim 1 wherein, The baffle is in a semicircular ring shape, the outer wall of the baffle is matched with the inner wall of the cylinder, and the inner wall of the baffle is matched with the outer wall of the pipeline.

5. The subcooling regenerator as set forth in claim 1 wherein, The plurality of baffles are arranged at intervals.

6. The subcooling regenerator as set forth in claim 1 wherein, The inlet is adjacent to one end where the first medium flows into the pipeline.

7. The subcooling regenerator of claim 1, wherein The outlet is adjacent to one end where the first medium flows out of the pipeline.

8. A centrifugal compressor train, characterized by, The centrifugal compressor unit comprises the supercooling regenerative device according to any one of claims 1-7.

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