Vertical evaporator and heat exchange unit

Abstract

The utility model discloses a vertical evaporator and a heat exchange unit, which comprise a first evaporator barrel body, a second evaporator barrel body and a third evaporator barrel body, an evaporator air outlet pipe is arranged on the upper end cover; the second evaporator cylinder is coaxially arranged at the bottom of the first evaporator cylinder body (3); the evaporator heat exchange pipe is vertically arranged in the second evaporator cylinder, and the bottom of the evaporator heat exchange pipe is communicated with an evaporator water inlet pipe (7); the evaporator inner barrel is coaxially arranged in the first evaporator barrel body, and the evaporator inner barrel and the evaporator air outlet pipe (1) form a closed air suction cavity; and an air suction filter screen (14) is arranged between the evaporator upper end cover (2) and the top of the evaporator inner cylinder (13). The gradually-reduced machine room area requirement of the market can be met; and meanwhile, the situation that the heat exchange tubes are not submerged due to unqualified levelness can be avoided, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the chemical / refrigeration industry and the field of heat transfer, and in particular to water chiller units and vertical evaporators. Background Technology

[0002] The central air conditioning market is increasingly demanding energy efficiency. Against this backdrop, the heat exchangers for chiller units are requiring higher heat exchange efficiency, and heat exchangers with multiple tubes and large heat exchange areas are becoming more widely used. Consequently, heat exchangers are becoming larger and occupying more floor space.

[0003] In addition, existing heat exchangers have complex structures and high material costs, and they occupy an increasingly large area, making it difficult to meet the decreasing space requirements of computer rooms.

[0004] like Figure 1 Horizontal evaporators, while primarily designed to minimize the machine room footprint, still require a significant amount of space. Their design can be complex, increasing manufacturing costs and installation difficulty. This complex structure can also present challenges for maintenance and repair. Due to their compact internal structure, thorough cleaning and maintenance can be difficult. In particular, cleaning the suction filter and heat exchange tubes may require specialized tools or methods. The heat exchange tube bundle may demand high installation precision and a more level container to ensure all tubes are completely submerged in refrigerant. This can further increase the difficulty and cost of installation. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a vertical evaporator and heat exchange unit that occupies a smaller area and can meet the increasingly smaller computer room area requirements in the market; at the same time, it can avoid the situation where the heat exchange tubes are not submerged due to substandard levelness, thereby improving heat exchange efficiency.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A vertical evaporator, characterized in that it comprises:

[0008] The first evaporator cylinder (3) is vertically installed between the upper end cover (2) and the lower end cover (11) of the evaporator; the upper end cover (2) is provided with an evaporator gas outlet pipe (1); the first evaporator cylinder (3) is provided with an evaporator water outlet pipe (12).

[0009] The second evaporator cylinder (5) is coaxially arranged at the bottom of the first evaporator cylinder (3) and extends downward from the lower end cover (11) to the lower water cover (15); the second evaporator cylinder (5) is provided with an evaporator inlet pipe (9) that connects to the cylinder body;

[0010] The evaporator heat exchange tube (10) is vertically installed in the second evaporator cylinder (5), and its bottom is connected to the evaporator water inlet pipe (7);

[0011] The inner cylinder (13) of the evaporator is coaxially arranged in the first evaporator cylinder (3), and its top is connected to the upper end cover (2) of the evaporator, forming a sealed suction chamber with the evaporator outlet pipe (1); a suction filter (14) is provided between the upper end cover (2) of the evaporator and the top of the inner cylinder (13) of the evaporator.

[0012] In the above technical solution, the outer wall of the evaporator inner cylinder (13) is radially distributed around the first evaporator cylinder (3) with through holes or thin tubes arranged horizontally or obliquely to connect the internal space of the evaporator inner cylinder (13) with the internal space of the first evaporator cylinder (3).

[0013] In the above technical solution, the air intake filter (14) covers at least the projected area of ​​the inner cylinder (13) of the evaporator.

[0014] In the above technical solution, an evaporator heat exchange tube (10) is installed inside the second evaporator cylinder (5). The evaporator heat exchange tube (10) is fixed on the evaporator tube sheet (8). The outer surfaces of the evaporator tube sheet (8) and the evaporator heat exchange tube (10) form a heat exchange sealed cavity with the second evaporator cylinder (5). That is, the evaporator tube sheet (8) is circumferentially connected to the inner wall of the second evaporator cylinder (5).

[0015] In the above technical solution, the evaporator tube sheet (8) and the lower water cover (15) spaced at the bottom form a refrigerant space, and the bottom end of the evaporator heat exchange tube (10) passes through the evaporator tube sheet (8) and is located in the refrigerant space.

[0016] In the above technical solution, the bottom end of the evaporator heat exchange tube (10) is immersed in the refrigerant loaded in the refrigerant space.

[0017] In the above technical solution, a liquid level control pipeline (4) is set up to connect the first evaporator cylinder (3), the second evaporator cylinder (5) and the evaporator heat exchange tube (10) respectively.

[0018] In the above technical solution, the bottom surface of the upper cover (2) of the evaporator is covered with a suction filter (14).

[0019] In the above technical solution, an evaporator support (6) is provided at the lower end of the second evaporator cylinder (5), and the height of the evaporator support (6) is higher than the space where the evaporator inlet pipe (7) is set.

[0020] A heat exchange unit, characterized in that it employs a vertical evaporator as described in any one of the above claims.

[0021] The beneficial effects of this utility model are:

[0022] The heat exchange tubes are placed vertically, which takes up less space than traditional heat exchangers and can meet the increasingly smaller computer room space requirements of the market.

[0023] Placing the heat exchange tube bundle vertically can prevent the heat exchange tubes from being submerged due to improper leveling, thus reducing the requirements for container levelness.

[0024] The inner cylinder of the evaporator, the upper cover of the evaporator, and the evaporator outlet pipe form a closed suction chamber. The lower part of the upper cover of the evaporator is covered with suction filters. Because the area enclosed by the inner cylinder of the evaporator is relatively large, a low flow velocity can be formed at the filter, reducing the risk of liquid carry-over during suction.

[0025] The refrigerant evaporates through heat exchange with the heat exchange tubes, forming a saturated gaseous refrigerant. This gaseous refrigerant then further exchanges heat with the subsequent heat exchange tubes, absorbing heat and becoming superheated, further reducing the risk of liquid carryover during suction. The evaporator tube sheet, the outer surface of the evaporator heat exchange tubes, and the second evaporator shell form a closed heat exchange cavity. After exchanging heat with the evaporator heat exchange tubes, the refrigerant evaporates and absorbs heat, at which point the refrigerant inside the cavity is saturated. The gaseous refrigerant then carries the liquid refrigerant upwards at high speed, continuing to exchange heat with the subsequent heat exchange tubes and absorbing heat, changing from a saturated state to a superheated state, further reducing the risk of liquid carryover during suction.

[0026] The heat exchange tube bundle formed by the evaporator heat exchange tubes is placed vertically and immersed in the refrigerant to avoid the heat exchange tubes not being submerged due to substandard levelness, thereby improving heat exchange efficiency.

[0027] The liquid level control pipeline ensures that the liquid level inside the evaporator cylinder is controlled within a reasonable range, thus guaranteeing the reliability of heat exchange. Attached Figure Description

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0029] Figure 1 This is a schematic diagram of the structure of an existing evaporator.

[0030] Figure 2 This is a schematic diagram of the structure of the evaporator in an embodiment of this utility model. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0032] Example 1, as Figure 2 In the vertical evaporator shown.

[0033] The shell side of the container on the refrigerant side, as shown in the figure above, is formed by welding the upper end cover 2 of the evaporator, the evaporator tube sheet 8, the first evaporator cylinder 3, and the second evaporator cylinder 5, and the inner cylinder 13 of the evaporator to form a closed shell side chamber.

[0034] The water side of the container is connected to the lower water cover 15 of the evaporator heat exchange tube 10, the evaporator tube plate 8, the upper cover 2 of the evaporator, and the inner cylinder 13 of the evaporator to form a closed chamber.

[0035] The container is immersed in fluorine. The liquid supply pipe enters the evaporator through the liquid inlet pipe 9 of the evaporator. The liquid refrigerant flows through the high-efficiency heat exchange tube absorption tube in the heat exchange tube 10 of the evaporator and boils due to the heat. The gaseous refrigerant flows out from the evaporator outlet pipe 1 through the evaporator suction filter 14. The suction filter 14 covers at least the projected area of ​​the inner cylinder 13 of the evaporator.

[0036] The chilled water side of the tube circuit uses a single-pass design; the refrigerant is described below. Figure 2 Water enters from the evaporator inlet 7, flows sequentially through the evaporator heat exchange tube 10, and exits from the evaporator outlet pipe 12; the refrigerant chilled water exchanges heat with the refrigerant through the heat exchange tube, realizing the evaporation and heat absorption of the refrigerant, and achieving the cooling effect of the refrigerant.

[0037] The evaporator inner cylinder 13, the evaporator upper cover 2, and the evaporator outlet pipe 1 form a closed suction chamber. The lower part of the evaporator upper cover 2 is covered with suction filter screen 14. Since the area enclosed by the evaporator inner cylinder 13 is large, a low flow rate can be formed at the filter screen, reducing the risk of liquid carry-over during suction.

[0038] The outer surfaces of the evaporator tube sheet 8 and the evaporator heat exchange tubes 10 form a heat exchange sealed cavity with the second evaporator cylinder 5. After the refrigerant exchanges heat with the evaporator heat exchange tubes 10, it evaporates and absorbs heat. At this time, the refrigerant in the cavity is in a saturated state. Then, the gaseous refrigerant carries the liquid refrigerant upwards at high speed. The gaseous refrigerant continues to exchange heat with the downstream heat exchange tubes 10 and absorb heat, changing from a saturated state to a superheated state, further reducing the risk of liquid carryover during gas intake.

[0039] Ten bundles of heat exchange tubes are placed vertically and immersed in refrigerant to prevent the heat exchange tubes from being submerged due to improper leveling, thus improving heat exchange efficiency.

[0040] The liquid level control line 4 ensures that the liquid level inside the evaporator cylinder is controlled within a reasonable range, guaranteeing the reliability of heat exchange. Because the area enclosed by the inner cylinder 13 of the evaporator is relatively large, a lower flow velocity can be formed in the upper part of the gaseous refrigerant, and the entire surface is covered with a filter screen, reducing the risk of liquid carryover during suction.

[0041] Example 2 is a heat exchange unit formed based on Example 1.

[0042] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A vertical evaporator, characterized in that, include: The first evaporator cylinder (3) is vertically installed between the upper end cover (2) and the lower end cover (11) of the evaporator; the upper end cover (2) is provided with an evaporator gas outlet pipe (1); the first evaporator cylinder (3) is provided with an evaporator water outlet pipe (12). The second evaporator cylinder (5) is coaxially arranged at the bottom of the first evaporator cylinder (3) and extends downward from the lower end cover (11) to the lower water cover (15); the second evaporator cylinder (5) is provided with an evaporator inlet pipe (9) that connects to the cylinder body; The evaporator heat exchange tube (10) is vertically installed in the second evaporator cylinder (5), and its bottom is connected to the evaporator water inlet pipe (7); The inner cylinder (13) of the evaporator is coaxially arranged in the first evaporator cylinder (3), and its top is connected to the upper end cover (2) of the evaporator, forming a sealed suction chamber with the evaporator outlet pipe (1); a suction filter (14) is provided between the upper end cover (2) of the evaporator and the top of the inner cylinder (13) of the evaporator.

2. The vertical evaporator according to claim 1, characterized in that, The outer wall of the evaporator inner cylinder (13) is radially distributed around the first evaporator cylinder (3) with through holes or thin tubes arranged horizontally or obliquely to connect the internal space of the evaporator inner cylinder (13) with the internal space of the first evaporator cylinder (3).

3. The vertical evaporator according to claim 1, characterized in that, The intake filter (14) covers at least the projected area of ​​the inner cylinder (13) of the evaporator.

4. The vertical evaporator according to claim 1, characterized in that, An evaporator heat exchange tube (10) is installed inside the second evaporator cylinder (5). The evaporator heat exchange tube (10) is fixed on the evaporator tube sheet (8). The outer surfaces of the evaporator tube sheet (8) and the evaporator heat exchange tube (10) form a heat exchange sealed cavity with the second evaporator cylinder (5).

5. The vertical evaporator according to claim 1, characterized in that, The evaporator tube sheet (8) and the lower water cover (15) spaced at the bottom form a refrigerant space, and the bottom end of the evaporator heat exchange tube (10) passes through the evaporator tube sheet (8) and is located in the refrigerant space.

6. The vertical evaporator according to claim 5, characterized in that, The bottom of the evaporator heat exchange tube (10) is immersed in the refrigerant loaded in the refrigerant space.

7. The vertical evaporator according to claim 1, characterized in that, A liquid level control pipeline (4) is set up to connect the first evaporator cylinder (3), the second evaporator cylinder (5), and the evaporator heat exchange tube (10) respectively.

8. The vertical evaporator according to claim 1, characterized in that, The bottom surface of the upper end cover (2) of the evaporator is covered with a suction filter (14).

9. The vertical evaporator according to claim 1, characterized in that, An evaporator support (6) is provided at the lower end of the second evaporator cylinder (5), and the height of the evaporator support (6) is higher than the space where the evaporator inlet pipe (7) is set.

10. A heat exchange unit, characterized in that... The vertical evaporator described in any one of claims 1-9 is used.

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