An air cooler

Abstract

The utility model discloses a surface air cooler, it includes first unit, first unit one side is provided with the first gas collector that is communicated in multiple coil simultaneously, the middle part of first gas collector is communicated with first refrigerant return pipe, and first refrigerant return pipe includes first return section, second return section and third return section that communicate in proper order, and first return section is connected in first gas collector, and the one end of second return section is away from first return section and extends downward, and the one end of third return section is away from second return section and is communicated in the one side of first unit that is away from first gas collector, first return pipe, and one end is communicated in the bottom of first gas collector, and the other end is communicated in third return section. The refrigerant accumulated in first gas collector is directly returned to the bottom of first refrigerant return pipe through first return pipe in the application, reduces the problem that the refrigeration effect is poor when the surface air cooler starts in the refrigeration mode because of the insufficient refrigerant in the surface air cooler.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning equipment technology, and in particular to a surface cooler. Background Technology

[0002] In the ultra-large surface coolers already in use, when used as evaporators, the amount of refrigerant evaporating is relatively small, and it tends to accumulate at the bottom of the air collection pipe of the surface cooler, causing accumulation. This makes it difficult for some refrigerant to flow back into the surface cooler, resulting in insufficient refrigerant flow in the entire system when the ultra-large surface cooler is running in other modes, such as cooling mode, and poor operating performance. Utility Model Content

[0003] The purpose of this utility model is to provide a surface cooler to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0004] The solution to the technical problem of this utility model is: A surface cooler, comprising: The first unit has a first gas collection pipe connected to multiple coils on one side. The middle of the first gas collection pipe is connected to a first refrigerant return pipe. The first refrigerant return pipe includes a first return section, a second return section and a third return section connected in sequence. The first return section is connected to the first gas collection pipe. The end of the second return section away from the first return section extends downward. The end of the third return section away from the second return section is connected to the side of the first unit away from the first gas collection pipe. The first return pipe has one end connected to the bottom of the first gas collecting pipe and the other end connected to the third return section.

[0005] This technical solution has at least the following beneficial effects: When maintenance personnel detect refrigerant accumulation in the gas collecting pipe of the first unit of the surface cooler, a hole is drilled at the bottom of the first gas collecting pipe and a first return pipe is inserted and fixed. Then, the other end of the first return pipe is connected to the third return section for refrigerant return. When the surface cooler is used as an evaporator, part of the refrigerant that becomes gaseous is cooled from the first gas collecting pipe through the first refrigerant return pipe and flows back to the other side of the surface cooler. Part of the refrigerant that fails to return from the first refrigerant return pipe is cooled and accumulates, forming liquid refrigerant that can flow directly into the third return section at the bottom of the gas collecting pipe. The greater the mass of refrigerant accumulated below the middle of the gas collecting pipe, the greater the pressure formed, which allows the refrigerant at the bottom to enter the third return section better. This solution directly allows the accumulated refrigerant to enter the third return section in liquid form through the first return pipe, reducing the problem of poor cooling effect when the surface cooler is started in cooling mode due to insufficient refrigerant.

[0006] As a further improvement to the above technical solution, it includes at least one second unit connected in parallel with the first unit, the second unit is provided with a second gas collection pipe, the middle part of the second gas collection pipe is connected to a second refrigerant return pipe, the end of the second refrigerant return pipe away from the second gas collection pipe is connected to the first return section, the bottom of the second gas collection pipe is connected to a second return pipe, and the end of the second return pipe away from the second gas collection pipe is connected to the third return section.

[0007] As a further improvement to the above technical solution, the first gas collecting pipe is inclined relative to the horizontal plane, and the first return pipe is connected to the side of the first gas collecting pipe closer to the horizontal plane.

[0008] As a further improvement to the above technical solution, the first return pipe includes a first section and a second section that are interconnected. The first section is connected to the first gas collecting pipe, and the second section is connected to the third return section. The height of the front end of the first section is greater than the height of the end of the section.

[0009] As a further improvement to the above technical solution, it also includes a tee connector and a manifold, wherein the delivery end of the first return pipe, the delivery end of the second return pipe and the manifold are respectively connected to the tee connector, and the end of the manifold away from the tee connector is connected to the third return section.

[0010] As a further improvement to the above technical solution, the diameter of the first return pipe is smaller than the diameter of the first gas collecting pipe.

[0011] As a further improvement to the above technical solution, the diameter of the second return pipe is smaller than the diameter of the second gas collecting pipe.

[0012] As a further improvement to the above technical solution, the diameter of the manifold is smaller than the diameter of the third return section.

[0013] As a further improvement to the above technical solution, the second segment, the second return pipe, and the manifold all extend in a horizontal plane.

[0014] As a further improvement to the above technical solution, the diameters of the first segment, the second segment, and the second return pipe are equal. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly explained below. Obviously, the described drawings are only a part of the embodiments of this utility model, and not all of them. Those skilled in the art can obtain other design schemes and drawings based on these drawings without creative effort.

[0016] Figure 1 This is a partial structural diagram of the first and second units of this utility model; Figure 2 This is a partial structural cross-sectional view of the first and second units of this utility model from a top-down perspective; Figure 3 This is a partial structural schematic diagram of the first unit, the second unit, the first return pipe, and the second return pipe of this utility model; Figure 4 yes Figure 3 A magnified view of A in the middle.

[0017] Figure Labels 1. First unit; 11. First gas collection pipe; 12. First refrigerant return pipe; 121. First return section; 122. Second return section; 123. Third return section; 13. First return pipe; 2. Second unit; 21. Second gas collection pipe; 22. Second refrigerant return pipe; 23. Second return pipe; 3. T-joint; 4. Manifold. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] In existing air conditioning units, large surface coolers, when used as evaporators, allow refrigerant to circulate from the coil end inside the surface cooler in a gaseous state through the manifold and refrigerant return pipe to the other side of the surface cooler. However, because the refrigerant return pipe is connected to the middle of the manifold and is perpendicular to it, some gaseous refrigerant fails to enter the return pipe in a gaseous state in time. As a result, it cools and becomes liquid, accumulating at the bottom of the manifold. After long-term use, a large amount of refrigerant accumulates in the area from the bottom to the middle of the manifold, leading to insufficient refrigerant flow throughout the air conditioning unit. This results in poor performance when the air conditioning unit is operated in other modes. Therefore, there is an urgent need for a surface cooler that can reduce refrigerant accumulation in the manifold.

[0023] Reference Figure 1 and Figure 2 The surface cooler includes a first unit 1. A first gas collection pipe 11 is provided on one side of the first unit 1 and is simultaneously connected to multiple coils. A first refrigerant return pipe 12 is connected in the middle of the first gas collection pipe 11. The first refrigerant return pipe 12 includes a first return section 121, a second return section 122, and a third return section 123 connected in sequence. The first return section 121 is connected to the first gas collection pipe 11. The end of the second return section 122 away from the first return section 121 extends downward. The end of the third return section 123 away from the second return section 122 is connected to the side of the first unit 1 away from the first gas collection pipe 11. The first return pipe 13 has one end connected to the bottom of the first gas collection pipe 11 and the other end connected to the third return section 123.

[0024] As described above, when maintenance personnel detect refrigerant buildup in the gas collecting pipe of the first unit 1 of the surface cooler, a hole is drilled at the bottom of the first gas collecting pipe 11 and a first return pipe 13 is inserted and fixed. The other end of the first return pipe 13 is then connected to the third return section 123 for refrigerant return. When the surface cooler is used as an evaporator, part of the refrigerant that becomes gaseous flows from the first gas collecting pipe 11 through the first refrigerant return pipe 12 and is cooled and flows back to the other side of the surface cooler. Part of the refrigerant that fails to flow from the first refrigerant return pipe 12... The refrigerant in the middle recirculation is cooled and accumulated, forming liquid refrigerant that can flow directly into the third recirculation section 123 at the bottom of the gas collecting pipe. The greater the mass of refrigerant accumulated below the middle of the gas collecting pipe, the greater the pressure, which allows the refrigerant at the bottom to enter the third recirculation section 123 more effectively. This scheme uses the first recirculation pipe 13 to directly introduce the accumulated refrigerant into the third recirculation section 123 in liquid form, reducing the problem of poor cooling effect when the surface cooler is started in cooling mode due to insufficient refrigerant.

[0025] The height of the end of the first return section 121 connected to the first gas collecting pipe 11 is lower than the height of the end connected to the second return section 122, so that the gaseous refrigerant entering the first return section 121 can enter the second return section 122 along the rising channel.

[0026] The surface cooler in this application also includes at least one second unit 2 connected in parallel with the first unit 1. The second unit 2 is provided with a second gas collection pipe 21. The middle part of the second gas collection pipe 21 is connected to a second refrigerant return pipe 22. The end of the second refrigerant return pipe 22 away from the second gas collection pipe 21 is connected to a first return section 121. The bottom of the second gas collection pipe 21 is connected to a second return pipe 23. The end of the second return pipe 23 away from the second gas collection pipe 21 is connected to a third return section 123.

[0027] Large surface coolers typically consist of multiple units connected in parallel to increase their cooling or heating efficiency. In this application, at least one second unit 2 is connected in parallel with the first unit 1, and the second gas collection pipe 21 of the second unit 2 also suffers from refrigerant accumulation. By adopting the above-mentioned technical solution, after connecting the second refrigerant manifold to the first return section 121, the refrigerant there will flow along the first return section 121 to the third return section 123. At the same time, when too much refrigerant accumulates in the second gas collection pipe 21, the accumulated liquid refrigerant can be directly transported through the second return pipe 23, allowing it to directly enter the third return section 123 and flow back to the coil of the surface cooler, thus reducing refrigerant accumulation in the parallel second unit 2.

[0028] Specifically, the first return section 121 and the second return section 122 are connected by two of the joints of the tee connector 3, and the second refrigerant return pipe 22 is connected to the remaining joint of the tee connector 3. In this way, the first return section 121 and the second return section 122 can be stably connected by two relatively perpendicular joints of the tee connector 3, and the second refrigerant return pipe 22 can be connected to the first refrigerant return pipe 12, reducing the cost of pipe laying.

[0029] To match the overall structure of the air conditioning unit, refer to Figure 3 and Figure 4 In this embodiment, the first gas collecting pipe 11 is inclined relative to the horizontal plane, and the first return pipe 13 is connected to the side of the first gas collecting pipe 11 near the horizontal plane. After the first gas collecting pipe 11 is inclined, the refrigerant at the bottom of the first gas collecting pipe 11 flows smoothly to the first return pipe 13 at the inclined bottom, reducing the accumulation of refrigerant in the first gas collecting pipe 11. The second gas collecting pipe 21 and the second return pipe 23 can also adopt the same design to further reduce the accumulation of refrigerant at the bottom of the second gas collecting pipe 21.

[0030] In order to enable the refrigerant to flow quickly from the first gas collecting pipe 11 to the third return section 123, the first return pipe 13 includes a first section and a second section that are connected to each other. The first section is connected to the first gas collecting pipe 11, and the second section is connected to the third return section 123. The height of the front end of the first section is greater than the height of the end of the first section. By increasing the height difference between the front end and the end of the first return pipe 13, the gravitational potential energy of the liquid refrigerant is increased, thereby increasing the kinetic energy of the refrigerant flowing from there to the third return section 123.

[0031] As a further embodiment of the above embodiments, it also includes a three-way connector 3 and a manifold 4. The delivery end of the first return pipe 13, the delivery end of the second return pipe 23 and the manifold 4 are respectively connected to the three-way connector 3. The end of the manifold 4 away from the three-way connector 3 is connected to the third return section 123. Through the three-way connector 3, the refrigerant at the first return pipe 13 and the second return pipe 23 is collected, increasing the pressure at the manifold 4, making the pressure at that point higher, and accelerating the refrigerant return speed.

[0032] As a further implementation of the above embodiment, the diameter of the first return pipe 13 is smaller than the diameter of the first gas collecting pipe 11, and the diameter of the second return pipe 23 is smaller than the diameter of the second gas collecting pipe 21. By reducing the diameter of the first return pipe 13 and the second return pipe 23, the flow rate of the refrigerant at each location during return is increased, thereby accelerating the flow rate of the refrigerant entering the third return section 123.

[0033] As a further embodiment of the above embodiments, the diameter of the manifold 4 is smaller than the diameter of the third return section 123.

[0034] As a further implementation of the above embodiments, the second section, the second return pipe 23 and the manifold all extend in a horizontal plane. Each pipe section is set to extend horizontally and fit as close as possible to the air conditioning unit. At the same time, the horizontal extension can make the refrigerant flow stably in a horizontal plane.

[0035] As a further implementation of the above embodiments, the first section, the second section, and the second return pipe 23 have the same pipe diameter. By unifying the pipe diameters, the pressure difference caused by the change in pipe diameter during refrigerant flow is reduced, thereby slowing down the refrigerant flow rate.

[0036] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A surface cooler, characterized in that, include: The first unit has a first gas collection pipe connected to multiple coils on one side. The middle of the first gas collection pipe is connected to a first refrigerant return pipe. The first refrigerant return pipe includes a first return section, a second return section and a third return section connected in sequence. The first return section is connected to the first gas collection pipe. The end of the second return section away from the first return section extends downward. The end of the third return section away from the second return section is connected to the side of the first unit away from the first gas collection pipe. The first return pipe has one end connected to the bottom of the first gas collecting pipe and the other end connected to the third return section.

2. A surface cooler according to claim 1, characterized in that, It includes at least one second unit connected in parallel with the first unit, the second unit is provided with a second gas collection pipe, the middle part of the second gas collection pipe is connected to a second refrigerant return pipe, the end of the second refrigerant return pipe away from the second gas collection pipe is connected to the first return section, the bottom of the second gas collection pipe is connected to a second return pipe, and the end of the second return pipe away from the second gas collection pipe is connected to the third return section.

3. A surface cooler according to claim 1, characterized in that, The first gas collecting pipe is inclined relative to the horizontal plane, and the first return pipe is connected to the side of the first gas collecting pipe that is closer to the horizontal plane.

4. A surface cooler according to claim 2, characterized in that, The first return pipe includes a first section and a second section that are interconnected. The first section is connected to the first gas collecting pipe, and the second section is connected to the third return section. The height of the front end of the first section is greater than the height of the end of the first section.

5. A surface cooler according to claim 1, characterized in that, The diameter of the first return pipe is smaller than the diameter of the first gas collecting pipe.

6. A surface cooler according to claim 2, characterized in that, The diameter of the second return pipe is smaller than the diameter of the second gas collecting pipe.

7. A surface cooler according to claim 4, characterized in that, It also includes a tee connector and a manifold, wherein the delivery end of the first return pipe, the delivery end of the second return pipe and the manifold are respectively connected to the tee connector, and the end of the manifold away from the tee connector is connected to the third return section.

8. A surface cooler according to claim 7, characterized in that, The diameter of the manifold is smaller than the diameter of the third return section.

9. A surface cooler according to claim 7, characterized in that, The second segment, the second return pipe, and the manifold all extend in a horizontal plane.

10. A surface cooler according to claim 4, characterized in that, The diameters of the first segment, the second segment, and the second return pipe are equal.

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