Siphon oil cooling evaporative condenser and refrigerating system formed by same

Abstract

The utility model discloses a siphon oil cooling evaporative condenser and a refrigerating system formed by the siphon oil cooling evaporative condenser, and the inlet ends of a part of S-shaped heat exchange pipes in a heat exchange core of the siphon oil cooling evaporative condenser are communicated with each other and are converged to form a first inlet; the inlet ends of the remaining S-shaped heat exchange pipes are communicated with one another and converge to form a second inlet, and the outlets of all the S-shaped heat exchange pipes are communicated with one another and converge to form a liquid outlet. The refrigerating system comprises a siphon oil cooling refrigerating unit and a siphon oil cooling evaporative condenser; a liquid storage device of the siphon oil cooling refrigerating unit is communicated with the first inlet through a balance pipe, an oil separator of the siphon oil cooling refrigerating unit is communicated with the second inlet through an exhaust pipe, and an oil cooler of the siphon oil cooling refrigerating unit is communicated with the liquid outlet through a liquid return pipeline. According to the utility model, the height of the liquid refrigerant in the snakelike heat exchange tube communicated with the oil separator can be reduced, so that the occupied area of the gaseous refrigerant in the snakelike heat exchange tube is increased, the effective heat exchange area is further increased, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment technology, specifically to a siphon oil-cooled evaporative condenser and the refrigeration system thereof. Background Technology

[0002] In existing siphon oil-cooled evaporative condenser refrigeration systems, the balance pipe of the siphon oil-cooled refrigeration unit is connected to the exhaust pipe near the inlet of the evaporative condenser. This results in the evaporative condenser's heat exchange core having only two interfaces: one inlet and one outlet. Specifically, all the serpentine heat exchange tubes within the evaporative condenser's heat exchange core share a common inlet at their upper ends and a common outlet at their lower ends. Figure 1 , 2 As shown, because the siphon oil-cooled refrigeration unit heats the liquid refrigerant flowing back from the evaporative condenser, the pressure in the receiver of the siphon oil-cooled refrigeration unit increases. The increased pressure head pushes the liquid refrigerant back into the serpentine heat exchange tubes of the evaporative condenser, resulting in a larger liquid volume in the serpentine heat exchange tubes. The serpentine heat exchange tubes are the components used for heat exchange in the evaporative condenser. Because the liquid refrigerant occupies a large portion of the lower space within the serpentine heat exchange tubes, the space occupied by the gaseous refrigerant used for heat exchange is correspondingly reduced, which leads to a decrease in the heat exchange efficiency of the evaporative condenser. Utility Model Content

[0003] To address the aforementioned problems, this application provides a siphon oil-cooled evaporative condenser and a refrigeration system thereof, which can improve the heat exchange efficiency of the evaporative condenser.

[0004] The purpose of this utility model is achieved through the following technical solution: a siphon oil-cooled evaporative condenser, wherein the inlet ends of a portion of the serpentine heat exchange tubes in the heat exchange core of the siphon oil-cooled evaporative condenser are interconnected and merged into a first inlet, while the inlet ends of the remaining serpentine heat exchange tubes are also interconnected and merged into a second inlet, and the outlets of all the serpentine heat exchange tubes are interconnected and merged into a liquid outlet.

[0005] Furthermore, the heat exchange core is provided with an inlet distributor and an outlet manifold; the inlet distributor has a partition plate inside that divides the internal space of the inlet distributor into a first distribution chamber and a second distribution chamber; the inlet end of some of the serpentine heat exchange tubes in the heat exchange core is connected to the first distribution chamber, and the inlet of the first distribution chamber forms the first inlet; the inlet end of the remaining serpentine heat exchange tubes in the heat exchange core is connected to the second distribution chamber, and the inlet of the second distribution chamber forms the second inlet; the outlet of all the serpentine heat exchange tubes in the heat exchange core is connected to the outlet manifold, and the outlet of the outlet manifold forms the liquid outlet.

[0006] In another embodiment, the heat exchange core is provided with a first distributor, a second distributor, and an outlet manifold; the inlet end of some of the serpentine heat exchange tubes in the heat exchange core is connected to the first distributor, and the inlet of the first distributor forms the first inlet; the inlet end of the remaining serpentine heat exchange tubes in the heat exchange core is connected to the second distributor, and the inlet of the second distributor forms the second inlet; the outlet of all the serpentine heat exchange tubes in the heat exchange core is connected to the outlet manifold, and the outlet of the outlet manifold forms the liquid outlet.

[0007] In another embodiment, the siphon oil-cooled evaporative condenser is provided with at least two heat exchange cores. The inlet ends of the serpentine heat exchange tubes in some heat exchange cores are interconnected and merge into the first inlet. The inlet ends of the serpentine heat exchange tubes in the remaining heat exchange cores are also interconnected and merge into the second inlet. The outlets of the serpentine heat exchange tubes in all heat exchange cores are interconnected and merge into the liquid outlet.

[0008] This utility model also discloses a refrigeration system, which includes a siphon oil-cooled refrigeration unit and the aforementioned siphon oil-cooled evaporative condenser; the liquid receiver of the siphon oil-cooled refrigeration unit is connected to the first inlet of the siphon oil-cooled evaporative condenser through a balance pipe, its oil separator is connected to the second inlet of the siphon oil-cooled evaporative condenser through an exhaust pipe, and its oil cooler is connected to the liquid outlet of the siphon oil-cooled evaporative condenser through a return liquid pipe.

[0009] Compared with the prior art, this application has the following beneficial effects: In this utility model, the inlet of a portion of the serpentine heat exchange tubes in the siphon oil-cooled evaporative condenser is connected to the liquid receiver of the siphon oil-cooled refrigeration unit through a balance pipe, while the inlet of the remaining serpentine heat exchange tubes is connected to the oil separator of the siphon oil-cooled refrigeration unit through an exhaust pipe. This reduces the height of the liquid refrigerant in the serpentine heat exchange tubes connected to the oil separator, thereby increasing the area occupied by the gaseous refrigerant in the serpentine heat exchange tubes connected to the oil separator, thus increasing the effective heat exchange area of ​​the entire heat exchange core and improving the heat exchange efficiency of the siphon oil-cooled evaporative condenser.

[0010] Some of the additional features of this application will be described in the following description. These additional features will become apparent to those skilled in the art upon examination of the following description and the accompanying drawings, or upon understanding the production or operation of the embodiments. The features disclosed in this application can be implemented and achieved through the practice or use of various methods, means, and combinations thereof with respect to the specific embodiments described below. Attached Figure Description

[0011] The accompanying drawings, which are provided to further illustrate this application and constitute a part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute a limitation thereof. In the drawings, the same reference numerals denote the same components.

[0012] Figure 1 This is a structural diagram showing the connection between the evaporative condenser and the siphon oil-cooled refrigeration unit in an existing refrigeration system.

[0013] Figure 2 This is a schematic diagram showing the piping connection between the evaporative condenser and the siphon oil-cooled refrigeration unit in an existing refrigeration system.

[0014] Figure 3 This is a structural diagram of the heat exchange core of the siphon oil-cooled evaporative condenser of this utility model.

[0015] Figure 4 This is a top view of the heat exchange core of the siphon oil-cooled evaporative condenser of this utility model.

[0016] Figure 5 This is a cross-sectional view of the inlet splitter of this utility model.

[0017] Figure 6 This is a cross-sectional view of the outlet combiner of this utility model.

[0018] Figure 7 This is a structural diagram showing the connection between the siphon oil-cooled evaporative condenser and the siphon oil-cooled refrigeration unit of this utility model.

[0019] Figure 8 This is a schematic diagram of the piping connection between the siphon oil-cooled evaporative condenser and the siphon oil-cooled refrigeration unit of this utility model.

[0020] Figure 9 This is a schematic diagram comparing the height of the liquid refrigerant in the heat exchanger core of an existing refrigeration system with the height of the liquid refrigerant in the heat exchanger core of this application.

[0021] The reference numerals in the above figures are as follows: 1-Siphon oil-cooled evaporative condenser, 2-Siphon oil-cooled refrigeration unit, 3-Return liquid pipe, 4-Balance pipe, 5-Exhaust pipe, 6-Heat exchange core, 7-Serpentine heat exchange tube, 8-Inlet distributor, 9-Divider plate, 10-Outlet manifold, 11-First distributor chamber, 12-Second distributor chamber, 13-First inlet, 14-Second inlet, 15-Liquid outlet. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments.

[0023] Example 1

[0024] This embodiment discloses a siphon oil-cooled evaporative condenser. Similar to conventional evaporative condensers, this embodiment's siphon oil-cooled evaporative condenser has a heat exchange core 6, within which are arranged several serpentine heat exchange tubes 7, extending in a zigzag pattern from top to bottom. During operation, high-temperature gaseous refrigerant flows into the serpentine heat exchange tubes 7 from the upper inlet and undergoes a heat exchange reaction with the outside within the tubes. After the heat exchange reaction, the gaseous refrigerant becomes liquid and flows out from the lower outlet of the serpentine heat exchange tubes 7. The inventive aspect of this embodiment's siphon oil-cooled evaporative condenser lies in the structural design of the inlet and outlet ends of the serpentine heat exchange tubes 7, as detailed below:

[0025] In this embodiment, the inlet ends of a portion of the serpentine heat exchange tubes 7 within the heat exchange core 6 of the siphon oil-cooled evaporative condenser are interconnected and merge to form a first inlet 13, while the inlet ends of the remaining serpentine heat exchange tubes 7 are also interconnected and merge to form a second inlet 14. The outlets of all the serpentine heat exchange tubes 7 are interconnected and merge to form a liquid outlet 15. For example, the heat exchange core 6 has 20 serpentine heat exchange tubes 7, of which the inlet ends of 5 serpentine heat exchange tubes 7 are interconnected and merge to form the first inlet 13, the inlet ends of the remaining 15 serpentine heat exchange tubes 7 are interconnected and merge to form the second inlet 14, and the outlets of the 20 serpentine heat exchange tubes 7 are interconnected and merge to form a liquid outlet 15.

[0026] In specific settings, such as Figures 3-6As shown, the heat exchange core 6 is equipped with an inlet distributor 8 and an outlet manifold 10. The inlet distributor 8 has a partition plate 9 that divides its internal space into a first distribution chamber 11 and a second distribution chamber 12. The inlet ends of some of the serpentine heat exchange tubes 7 within the heat exchange core 6 are connected to the first distribution chamber 11, and the inlet of the first distribution chamber 11 forms the first inlet 13. That is, the inlet ends of these serpentine heat exchange tubes 7 are interconnected through the first distribution chamber 11. Correspondingly, the inlet ends of the remaining serpentine heat exchange tubes 7 within the heat exchange core 6 are connected to the second distribution chamber 12, and the inlet of the second distribution chamber 12 forms the second inlet 14. That is, the inlet ends of the remaining serpentine heat exchange tubes 7 are interconnected through the second distribution chamber 12. The outlets of all the serpentine heat exchange tubes 7 within the heat exchange core 6 are connected to the outlet manifold 10, and the outlet of the outlet manifold 10 forms the liquid outlet 15. That is, the outlet ends of all the serpentine heat exchange tubes 7 are interconnected through the outlet manifold 10. In specific implementations, the inlet distributor 8 and the outlet manifold 10 can be implemented using a hollow plate structure, such as... Figure 5 , 6 As shown.

[0027] This embodiment also discloses a refrigeration system, such as Figure 7 , 8 As shown, it includes a siphon oil-cooled refrigeration unit 2 and the aforementioned siphon oil-cooled evaporative condenser 1. Similar to conventional siphon oil-cooled refrigeration units, the siphon oil-cooled refrigeration unit 2 in this embodiment has a liquid receiver, an oil cooler, and an oil separator. The liquid receiver of the siphon oil-cooled refrigeration unit 2 is connected to the first inlet 13 of the siphon oil-cooled evaporative condenser 1 via a balance pipe 4. Its oil separator is connected to the second inlet 14 of the siphon oil-cooled evaporative condenser 1 via an exhaust pipe 5. Its oil cooler is connected to the outlet 15 of the siphon oil-cooled evaporative condenser 1 via a return pipe 3. Thus, the fluid flowing out of the balance pipe 4 is diverted by the first diversion chamber 11 and enters the serpentine heat exchange tubes 7 connected to the first diversion chamber 11. The fluid flowing out of the exhaust pipe 5 is diverted by the second diversion chamber 12 and enters the serpentine heat exchange tubes 7 connected to the second diversion chamber 12. All the fluid flowing out of the serpentine heat exchange tubes 7 is collected by the outlet manifold 10 and enters the return pipe 3.

[0028] In this embodiment, the inlet of a portion of the serpentine heat exchange tubes 7 in the siphon oil-cooled evaporative condenser is connected to the liquid receiver of the siphon oil-cooled refrigeration unit 2 via a balance pipe 4. The inlets of the remaining serpentine heat exchange tubes 7 are connected to the oil separator of the siphon oil-cooled refrigeration unit 2 via an exhaust pipe 5. Due to the presence of the exhaust dynamic pressure head, the height of the liquid refrigerant in the serpentine heat exchange tubes 7 connected to the oil separator is reduced, thereby increasing the area occupied by the gaseous refrigerant in the serpentine heat exchange tubes 7 connected to the oil separator. This increases the effective heat exchange area of ​​the entire heat exchange core 6, thereby improving the heat exchange efficiency of the siphon oil-cooled evaporative condenser 1. Figure 9 As shown. In specific implementation, the ratio of the number of serpentine heat exchange tubes 7 connected to the balance pipe 4 to the number of serpentine heat exchange tubes 7 connected to the exhaust pipe 5 can be adjusted according to the actual oil cooling load and condenser load of the refrigeration system; for example, when using the Fusheng SRL-330 screw chiller unit at an evaporation temperature of -30℃ and a condensation temperature of 30℃, the oil cooling load is 12KW, the condenser load is 145KW, and the ratio of the number of serpentine heat exchange tubes 7 connected to the balance pipe 4 to the number of serpentine heat exchange tubes 7 connected to the exhaust pipe 5 is 1:12.

[0029] Example 2

[0030] The difference between the siphon oil-cooled evaporative condenser of this embodiment and that of Embodiment 1 is that the heat exchange core 6 of the siphon oil-cooled evaporative condenser of this embodiment is provided with a first distributor, a second distributor, and an outlet manifold 10. The inlet ends of some of the serpentine heat exchange tubes 7 in the heat exchange core 6 are connected to the first distributor, and the inlet of the first distributor forms a first inlet 13; the inlet ends of the remaining serpentine heat exchange tubes 7 in the heat exchange core 6 are connected to the second distributor, and the inlet of the second distributor forms a second inlet 14; the outlets of all the serpentine heat exchange tubes 7 in the heat exchange core 6 are connected to the outlet manifold 10, and the outlet of the outlet manifold 10 forms a liquid outlet 15.

[0031] Similarly, in the refrigeration system composed of the siphon oil-cooled evaporative condenser of this embodiment, the liquid receiver of the siphon oil-cooled refrigeration unit 2 is connected to the first inlet 13 through the balance pipe 4, its oil separator is connected to the second inlet 14 through the exhaust pipe 5, and its oil cooler is connected to the liquid outlet 15 through the return pipe 3. The difference is that the balance pipe 4 and the exhaust pipe 5 are connected to the inlet end of the corresponding serpentine heat exchange tube 7 in the siphon oil-cooled evaporative condenser through two independent distributors. This can also reduce the height of the liquid refrigerant in the serpentine heat exchange tube 7 connected to the exhaust pipe 5, thereby increasing the effective heat exchange area of ​​the entire heat exchange core 6.

[0032] Example 3

[0033] The difference between the siphon oil-cooled evaporative condenser of this embodiment and that of Embodiment 1 is that the siphon oil-cooled evaporative condenser of this embodiment is provided with at least two heat exchange cores 6, wherein the inlet ends of the serpentine heat exchange tubes 7 in some of the heat exchange cores 6 are interconnected and merged into a first inlet 13, the inlet ends of the serpentine heat exchange tubes 7 in the remaining heat exchange cores 6 are also interconnected and merged into a second inlet 14, and the outlets of all the serpentine heat exchange tubes 7 in the heat exchange cores 6 are interconnected and merged into a liquid outlet 15.

[0034] Similarly, in the refrigeration system composed of the siphon oil-cooled evaporative condenser of this embodiment, the liquid receiver of the siphon oil-cooled refrigeration unit 2 is connected to the first inlet 13 through the balance pipe 4, its oil separator is connected to the second inlet 14 through the exhaust pipe 5, and its oil cooler is connected to the liquid outlet 15 through the return pipe 3. The difference is that the balance pipe 4 and the exhaust pipe 5 are respectively connected to the inlet end of the serpentine heat exchange tube 7 of different heat exchange cores 6, while the return pipe 3 is connected to the outlet end of the serpentine heat exchange tube 7 of all heat exchange cores 6. In this way, the height of the liquid refrigerant in the serpentine heat exchange tube 7 of the heat exchange core 6 connected to the exhaust pipe 5 can also be reduced, thereby increasing the total effective heat exchange area of ​​all heat exchange cores 6.

[0035] It should be noted that all features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any way, except for mutually exclusive features and / or steps.

[0036] Furthermore, the specific embodiments described above are exemplary. Those skilled in the art can devise various solutions inspired by the disclosure of this utility model, and these solutions all fall within the scope of this utility model and its protection. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and not intended to limit the scope of the claims. The scope of protection of this utility model is defined by the claims and their equivalents.

Claims

1. A siphon oil-cooled evaporative condenser, characterized in that, The inlet ends of a portion of the serpentine heat exchange tubes (7) in the heat exchange core (6) of the siphon oil-cooled evaporative condenser are interconnected and merge into a first inlet (13), while the inlet ends of the remaining serpentine heat exchange tubes (7) are also interconnected and merge into a second inlet (14), and the outlets of all the serpentine heat exchange tubes (7) are interconnected and merge into a liquid outlet (15).

2. The siphon oil-cooled evaporative condenser according to claim 1, characterized in that, The heat exchange core (6) is provided with an inlet distributor (8) and an outlet manifold (10); the inlet distributor (8) is provided with a partition plate (9) that divides the internal space of the inlet distributor (8) into a first distribution chamber (11) and a second distribution chamber (12); the inlet end of some of the serpentine heat exchange tubes (7) in the heat exchange core (6) is connected to the first distribution chamber (11), and the inlet of the first distribution chamber (11) forms the first inlet (13); the inlet end of the remaining serpentine heat exchange tubes (7) in the heat exchange core (6) is connected to the second distribution chamber (12), and the inlet of the second distribution chamber (12) forms the second inlet (14); the outlet of all the serpentine heat exchange tubes (7) in the heat exchange core (6) is connected to the outlet manifold (10), and the outlet of the outlet manifold (10) forms the liquid outlet (15).

3. The siphon oil-cooled evaporative condenser according to claim 1, characterized in that, The heat exchange core (6) is provided with a first distributor, a second distributor, and an outlet manifold (10); the inlet end of some of the serpentine heat exchange tubes (7) in the heat exchange core (6) is connected to the first distributor, and the inlet of the first distributor forms the first inlet (13); the inlet end of the remaining serpentine heat exchange tubes (7) in the heat exchange core (6) is connected to the second distributor, and the inlet of the second distributor forms the second inlet (14); the outlet of all the serpentine heat exchange tubes (7) in the heat exchange core (6) is connected to the outlet manifold (10), and the outlet of the outlet manifold (10) forms the liquid outlet (15).

4. The siphon oil-cooled evaporative condenser according to claim 1, characterized in that, The heat exchanger is provided with at least two heat exchange cores (6). The inlet ends of the serpentine heat exchange tubes (7) in some heat exchange cores (6) are interconnected and merge into the first inlet (13). The inlet ends of the serpentine heat exchange tubes (7) in the remaining heat exchange cores (6) are also interconnected and merge into the second inlet (14). The outlets of the serpentine heat exchange tubes (7) in all heat exchange cores (6) are interconnected and merge into the liquid outlet (15).

5. A refrigeration system, characterized in that, It includes a siphon oil-cooled refrigeration unit (2) and a siphon oil-cooled evaporative condenser (1) as described in any one of claims 1-4; the liquid storage tank of the siphon oil-cooled refrigeration unit (2) is connected to the first inlet (13) of the siphon oil-cooled evaporative condenser (1) through a balance pipe (4), its oil separator is connected to the second inlet (14) of the siphon oil-cooled evaporative condenser (1) through an exhaust pipe (5), and its oil cooler is connected to the liquid outlet (15) of the siphon oil-cooled evaporative condenser (1) through a return liquid pipe (3).

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