Evaporator

Abstract

The utility model belongs to the technical field of evaporators, in particular to an evaporator, which comprises a left support plate and a right support plate, heat exchange tubes are arranged and distributed between the left support plate and the right support plate, and the heat exchange tubes are divided into an upper heat exchange group, a middle heat exchange group and a lower heat exchange group. More than two upper snakelike flow channels, more than two middle snakelike flow channels and more than two lower snakelike flow channels are formed in the upper heat exchange group, the middle heat exchange group and the lower heat exchange group, and the upper snakelike flow channels and the lower snakelike flow channels are opposite in pairs and are connected end to end; the head end of the middle snakelike flow channel is communicated with the leading-in pipeline, the tail end of the middle snakelike flow channel is communicated with the head end of each upper snakelike flow channel through a first water distribution pipeline, and the leading-out pipeline is communicated with the tail end of each lower snakelike flow channel through a second water distribution pipeline. The vaporific refrigerant uniformly flows in the middle heat exchange group to ensure that the refrigerant is fully subjected to gas-liquid conversion, and then uniformly enters the upper heat exchange group with a plurality of snakelike runners, so that the evaporator has higher heat exchange efficiency.

Description

Technical fields:

[0001] This utility model belongs to the field of evaporator technology, and specifically refers to an evaporator. Background technology:

[0002] The evaporator is a very important component among the four major refrigeration components. By installing an expansion valve at the inlet of the evaporator, the high-temperature and high-pressure liquid refrigerant is throttled through the small orifice of the expansion valve and becomes a low-temperature and low-pressure mist refrigerant. This refrigerant flows in the heat exchange tubes of the evaporator and absorbs heat, evaporating into a gaseous state, thereby achieving the purpose of lowering the temperature.

[0003] An evaporator disclosed in a Chinese utility model patent (authorization announcement number CN205619623U) comprises a first liquid collection tank and a second liquid collection tank arranged in a group, spaced apart from each other; a plurality of tubes, the ends of which are respectively connected to the first liquid collection tank and the second liquid collection tank and arranged side by side along an airflow direction orthogonal to the extending direction of the first liquid collection tank and the second liquid collection tank; and a plurality of heat sinks disposed between adjacent tubes. This evaporator exchanges heat between the refrigerant flowing through the tubes and the air passing through the heat sinks. Its characteristic feature is that in the first liquid collection tank… The first and second liquid collection tanks each have an inlet for introducing the refrigerant at one end, and an outlet for discharging the refrigerant at the other end of the first and second liquid collection tanks, which is different from the end with the inlet. The interior of the first and second liquid collection tanks is divided into an upstream space and a downstream space along the airflow direction. In one of the upstream and downstream spaces facing the inlet and outlet, a shielding wall is provided to cut off the communication between the inlet and outlet.

[0004] However, in the above structure, when the low-temperature and low-pressure mist refrigerant enters the corresponding liquid collection box from the inlet, since the mist refrigerant is a gas-liquid mixture, there will inevitably be a gas-liquid unevenness. When the mist refrigerant enters another liquid collection box through multiple pipes, the heat exchange efficiency achieved due to the uneven gas-liquid flow of the mist refrigerant is different, resulting in a lower heat exchange efficiency for the entire evaporator. Summary of the Invention:

[0005] The purpose of this invention is to provide an evaporator that optimizes the flow of refrigerant within the heat exchange tubes. By rationally dividing the heat exchange tubes into an upper heat exchange group, a middle heat exchange group, and a lower heat exchange group, the atomized refrigerant first flows uniformly within the middle heat exchange group to ensure sufficient gas-liquid conversion of the refrigerant, and then uniformly enters the upper heat exchange group with multiple serpentine flow channels, thereby enabling the evaporator to have a high heat exchange efficiency.

[0006] This utility model is implemented as follows:

[0007] An evaporator includes a left support plate and a right support plate. A plurality of heat exchange tubes are arranged between the left and right support plates. The two ends of the heat exchange tubes extend beyond the left and right support plates respectively and are connected to the corresponding ends of another heat exchange tube through a connecting channel. The heat exchange tubes located between the left and right support plates are divided into an upper heat exchange group, a middle heat exchange group, and a lower heat exchange group from top to bottom. Adjacent heat exchange tubes in the upper, middle, and lower heat exchange groups form an upper serpentine flow channel, a middle serpentine flow channel, and a lower serpentine flow channel through a connecting channel. The upper and lower serpentine flow channels have two or more, which are opposite to each other and connected end to end. The first end of the middle serpentine flow channel is connected to an inlet pipe, and the last end is connected to the first end of each upper serpentine flow channel through a water distribution pipe. The outlet pipe is connected to the last end of each lower serpentine flow channel through a water distribution pipe.

[0008] In the aforementioned evaporator, there are two upper serpentine flow channels and two lower serpentine flow channels, one water distribution pipe has two water outlets, and the other water distribution pipe has two water inlets.

[0009] In the aforementioned evaporator, the heat exchange tubes in adjacent upper and lower rows are staggered left and right. The upper heat exchange group, the middle heat exchange group, and the lower heat exchange group each have two rows of heat exchange tubes, and the corresponding ends of the upper and lower rows of heat exchange tubes in the middle heat exchange group are connected by an inclined connecting bend.

[0010] In the aforementioned evaporator, there are four upper and lower serpentine flow channels, four water distribution pipes, and four water inlet pipes.

[0011] In the aforementioned evaporator, the heat exchange tubes in adjacent upper and lower rows are staggered left and right. The upper heat exchange group has three or more rows of heat exchange tubes, the middle heat exchange group has one row of heat exchange tubes, and the lower heat exchange group has two or more rows of heat exchange tubes. The number of heat exchange tube rows in the upper heat exchange group is greater than the number of heat exchange tube rows in the lower heat exchange group. The corresponding ends of adjacent rows of heat exchange tubes in the upper and lower heat exchange groups are connected by inclined connecting bends.

[0012] The outstanding advantages of this utility model compared to the prior art are:

[0013] This invention optimizes the flow of refrigerant within the heat exchange tubes by dividing the tubes into an upper heat exchange group, a middle heat exchange group, and a lower heat exchange group. This allows the atomized refrigerant to flow uniformly within the middle heat exchange group first, ensuring complete vaporization before it evenly enters the upper heat exchange group, which has multiple serpentine flow channels. This results in a higher heat exchange efficiency for the evaporator. Attached image description:

[0014] Figure 1 This is a front view of the entire machine according to Embodiment 1 of this utility model;

[0015] Figure 2 This is a right view of the entire machine according to Embodiment 1 of this utility model;

[0016] Figure 3 This is a left view of the entire machine according to Embodiment 1 of this utility model;

[0017] Figure 4 This is a front view of the entire machine according to Embodiment 2 of this utility model;

[0018] Figure 5 This is a left view of the entire machine according to Embodiment 2 of this utility model;

[0019] Figure 6 This is a right view of the entire machine according to Embodiment 2 of this utility model.

[0020] In the diagram: 1. Left support plate; 2. Right support plate; 3. Heat exchange tube; 4. Upper heat exchange group; 5. Middle heat exchange group; 6. Lower heat exchange group; 7. Inlet pipe; 8. Water distribution pipe one; 9. Outlet pipe; 10. Water distribution pipe two; 11. Connecting bend. Detailed implementation method:

[0021] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —6:

[0022] Example 1:

[0023] An evaporator includes a left support plate 1 and a right support plate 2. A plurality of heat exchange tubes 3 are arranged between the left support plate 1 and the right support plate 2. The two ends of each heat exchange tube 3 extend beyond the left support plate 1 and the right support plate 2, respectively, and are connected to the corresponding ends of another heat exchange tube 3 via connecting channels. The heat exchange tubes 3 located between the left support plate 1 and the right support plate 2 are sequentially divided from top to bottom into an upper heat exchange group 4, a middle heat exchange group 5, and a lower heat exchange group 6. The adjacent heat exchange tubes 3 in heat exchange group 5 and lower heat exchange group 6 are connected by connecting channels to form upper serpentine flow channels, middle serpentine flow channels, and lower serpentine flow channels. There are two or more upper and lower serpentine flow channels, each opposite the other and connected end-to-end. The first end of the middle serpentine flow channel is connected to the inlet pipe 7, and the last end is connected to the first end of each upper serpentine flow channel via water distribution pipe 1 8. The outlet pipe 9 is connected to the last end of each lower serpentine flow channel via water distribution pipe 2 10. It should be noted that the external airflow flows sequentially from bottom to top through lower heat exchange group 6, middle heat exchange group 5, and upper heat exchange group 4. Thus, after the refrigerant absorbs heat and completely vaporizes in the middle heat exchange group 5, it exchanges heat with the airflow at a lower temperature in the upper heat exchange group 4. This demonstrates the rational design of the refrigerant flow in the heat exchange tubes 3 of upper heat exchange group 4, middle heat exchange group 5, and lower heat exchange group 6, enabling effective heat exchange between the refrigerant and the external airflow.

[0024] This invention optimizes the flow of refrigerant within the heat exchange tube 3 by dividing the heat exchange tube 3 into an upper heat exchange group 4, a middle heat exchange group 5, and a lower heat exchange group 6. This allows the atomized refrigerant to flow uniformly within the middle heat exchange group 5 first, ensuring sufficient gas-liquid conversion of the refrigerant, before it evenly enters the upper heat exchange group 4, which has multiple serpentine flow channels. This results in a higher heat exchange efficiency for the evaporator.

[0025] In this embodiment, the upper serpentine flow channel and the lower serpentine flow channel are two separate channels, the first water distribution pipe 8 has two outlet ends, and the second water distribution pipe 10 has two inlet ends.

[0026] Meanwhile, the heat exchange tubes 3 in the adjacent upper and lower rows are staggered. The upper heat exchange group 4, the middle heat exchange group 5 and the lower heat exchange group 6 each have two rows of heat exchange tubes 3, and the corresponding ends of the upper and lower rows of heat exchange tubes 3 in the middle heat exchange group 5 are connected by an inclined connecting bend 11.

[0027] Example 2:

[0028] This embodiment is basically the same in structure as the first embodiment above. The main difference is that in the above-mentioned evaporator, there are four upper serpentine channels and four lower serpentine channels, the first water distribution pipe 8 has four water outlets, and the second water distribution pipe 10 has four water inlets.

[0029] Furthermore, in order to ensure that the external airflow can fully exchange heat with the heat exchange tubes 3 of the upper heat exchange group 4, the heat exchange tubes 3 of the adjacent upper and lower rows are staggered. The upper heat exchange group 4 has three or more rows of heat exchange tubes 3, the middle heat exchange group 5 has one row of heat exchange tubes 3, and the lower heat exchange group 6 has two or more rows of heat exchange tubes 3. The number of rows of heat exchange tubes 3 in the upper heat exchange group 4 is greater than the number of rows of heat exchange tubes 3 in the lower heat exchange group 6. The corresponding ends of the adjacent rows of heat exchange tubes 3 in the upper heat exchange group 4 and the lower heat exchange group 6 are connected by an inclined connecting bend 11.

[0030] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. An evaporator comprising a left support plate (1) and a right support plate (2), wherein a plurality of heat exchange tubes (3) are arranged between the left support plate (1) and the right support plate (2), and both ends of the heat exchange tubes (3) extend beyond the left support plate (1) and the right support plate (2) respectively and are connected to the corresponding ends of another heat exchange tube (3) through a connecting channel, characterized in that: The heat exchange tubes (3) located between the left support plate (1) and the right support plate (2) are divided into an upper heat exchange group (4), a middle heat exchange group (5) and a lower heat exchange group (6) from top to bottom. The adjacent heat exchange tubes (3) in the upper heat exchange group (4), the middle heat exchange group (5) and the lower heat exchange group (6) form an upper serpentine flow channel, a middle serpentine flow channel and a lower serpentine flow channel through a connecting channel. The upper serpentine flow channel and the lower serpentine flow channel have two or more of them and are opposite to each other and connected end to end. The first end of the middle serpentine flow channel is connected to the inlet pipe (7) and the last end is connected to the first end of each upper serpentine flow channel through the first water distribution pipe (8). The outlet pipe (9) is connected to the last end of each lower serpentine flow channel through the second water distribution pipe (10).

2. An evaporator according to claim 1, characterized in that: The upper serpentine flow channel and the lower serpentine flow channel have two sections, the first water distribution pipe (8) has two outlet ends, and the second water distribution pipe (10) has two inlet ends.

3. An evaporator according to claim 2, characterized in that: The heat exchange tubes (3) in the adjacent upper and lower rows are staggered. The upper heat exchange group (4), the middle heat exchange group (5) and the lower heat exchange group (6) each have two rows of heat exchange tubes (3). The corresponding ends of the upper and lower rows of heat exchange tubes (3) in the middle heat exchange group (5) are connected by an inclined connecting bend (11).

4. An evaporator according to claim 1, characterized in that: The upper serpentine flow channel and the lower serpentine flow channel have four sections, the first water distribution pipe (8) has four outlet ends, and the second water distribution pipe (10) has four inlet ends.

5. An evaporator according to claim 4, characterized in that: The heat exchange tubes (3) of the adjacent upper and lower rows are staggered. The upper heat exchange group (4) has more than three rows of heat exchange tubes (3), the middle heat exchange group (5) has one row of heat exchange tubes (3), and the lower heat exchange group (6) has more than two rows of heat exchange tubes (3). The number of rows of heat exchange tubes (3) in the upper heat exchange group (4) is greater than the number of rows of heat exchange tubes (3) in the lower heat exchange group (6). The corresponding ends of the adjacent rows of heat exchange tubes (3) in the upper heat exchange group (4) and the lower heat exchange group (6) are connected by inclined connecting bends (11).

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