Condensing pipe, condensing pipe group, falling film condenser and refrigerating system

Abstract

The utility model relates to the field of air conditioners, in particular to a condensation pipe, a condensation pipe set, a falling film condenser and a refrigerating system. The utility model aims to provide a new scheme at least aiming at the problem that the surface of the existing evaporative condenser pipe is scaled, and the novel scheme can further prevent scaling or clean the scaling. The condensation pipe comprises a pipe body, and a non-stick coating covers the surface of the pipe body in a surrounding mode. The condensation pipe group comprises at least two condensation pipes, and the at least two condensation pipes are at least partially located at a parallel angle. The surface of a pipe body of each condensation pipe is covered with a non-stick coating. Each condensation pipe is provided with a flow inlet end and a flow outlet end; comprising a flow inlet main pipe, and the flow inlet ends of at least two condensation pipes are communicated with the flow inlet main pipe; comprising a main outflow pipe, and the outflow ends of the at least two condensation pipes are communicated with the main outflow pipe.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning, specifically to condenser tubes, condenser tube assemblies, falling film condensers, and refrigeration systems. Background Technology

[0002] In a refrigeration system, the evaporator, condenser, compressor, and expansion valve are the four essential components. The evaporator is responsible for delivering cooling capacity; the refrigerant absorbs heat from the object being cooled, thus achieving refrigeration. The compressor, the heart of the system, draws in, compresses, and transports refrigerant vapor. The condenser releases heat, transferring the heat absorbed in the evaporator, along with the heat generated by the compressor's work, to the cooling medium. The expansion valve throttles and reduces the pressure of the refrigerant, while also controlling and regulating the amount of liquid refrigerant flowing into the evaporator, dividing the system into high-pressure and low-pressure sides. In actual refrigeration systems, in addition to these four main components, auxiliary devices are often included, such as solenoid valves, distributors, dryers, solar collectors, fusible plugs, and pressure controllers. These components are installed to improve operational economy, reliability, and safety.

[0003] A condenser is a component of a refrigeration system, a type of heat exchanger that converts gas or vapor into liquid, rapidly transferring heat from the condenser tubes to the surrounding air. The condenser's operation is exothermic, hence its relatively high temperature. There are several types of condensation. Water-cooled condensers use water as the cooling medium, relying on the water's temperature rise to remove heat. Cooling water is generally recycled, but a cooling tower or cooling water tank is required in the system. Water-cooled condensers can be further classified into shell-and-tube and coaxial condensers, with shell-and-tube condensers being more common. Air-cooled condensers use air as the cooling medium, relying on the air's temperature rise to remove heat. This type of condenser is suitable for situations with extreme water shortages or no water supply, and is commonly found in small Freon refrigeration units.

[0004] The evaporative condenser is the main heat exchange device in the refrigeration system. Its working principle is as follows: the high-temperature, high-pressure refrigerant gas discharged from the compressor passes through the condenser coils in the evaporative condenser, where the high-temperature gaseous refrigerant exchanges heat with the sprayed water and air outside the coils. Specifically, the gaseous refrigerant enters the coils from the top and is gradually condensed into liquid refrigerant from top to bottom. The powerful airflow from the accompanying blower ensures that the sprayed water completely and evenly covers the surface of the coils, greatly improving the heat exchange effect. The heated sprayed water partially turns into a gaseous state, and the latent heat of vaporization of water is used to carry away a large amount of heat with the airflow. Water droplets in the hot air are trapped by a high-efficiency dehydrator, and together with the remaining water that has absorbed heat, they fall into the PVC water-spraying sheet heat exchange layer, where they are cooled by the flowing air, lowering their temperature, and then enter the water tank, where they are further circulated by the circulating water pump.

[0005] However, a significant problem with existing evaporative condensers is the formation of scale (including water scale and dirt) on the surface of the condenser tubes. The main reasons for this scaling are: calcium and magnesium ions dissolved in the water reach saturation during evaporation, precipitating out and adhering to the condenser surface to form water scale; during evaporation, the concentration of salts and minerals dissolved in the water increases, and when they reach saturation, they crystallize and adhere to the heat exchange surface to form hard scale; furthermore, under suitable conditions, microorganisms such as algae and bacteria can multiply on the surface of the condenser tubes, forming a biofilm that accelerates the formation of water scale and dirt.

[0006] To prevent scaling on the surface of condenser tubes, Chinese Patent Publication No. CN115615054B, entitled "A Falling Curtain Condenser," describes a previous generation design by the applicant's R&D team. This design evenly distributes water on the surface of the condenser tubes, ensuring the water completely covers the surface and forms a water wall / film between different condenser tubes. This achieves multiple advantages such as preventing scaling, saving water, and improving energy efficiency. However, this existing design has the potential to further improve the prevention of scaling. Utility Model Content

[0007] The purpose of this invention is to provide a new solution to address the problem of scaling on the surface of existing evaporative condenser tubes, thereby further preventing or removing scaling.

[0008] To solve the above-mentioned technical problems, the present invention provides a condenser tube, including a tube body, the surface of which is covered with a non-stick coating.

[0009] A condenser coil assembly includes at least two condenser coils, the at least two condenser coils being at least partially parallel; the surface of each condenser coil is covered with a non-stick coating.

[0010] Each of the aforementioned condenser tubes has an inlet end and an outlet end;

[0011] Includes a main inlet pipe, and the inlet ends of at least two of the condenser tubes are connected to the main inlet pipe;

[0012] It includes an outflow main pipe, and the outflow ends of at least two of the condenser tubes are connected to the outflow main pipe.

[0013] In a preferred embodiment of the condenser tube assembly of this utility model, the condenser tube is straight or bent into a U-shape; the inlet end of each condenser tube is positioned higher than the outlet end of that condenser tube.

[0014] In a preferred embodiment of the condenser tube assembly of this utility model, the condenser tube, which is straight or bent into a U-shape, is presented at an inclined angle when viewed from the side.

[0015] As a preferred embodiment of the condenser tube assembly of this utility model, the straight condenser tubes are arranged diagonally from a side view and at a vertical or inclined angle from a top view.

[0016] In a preferred embodiment of the condenser tube assembly of this utility model, the vertical water supply of the condenser tube has a water distribution pipe; the outlet of the water distribution pipe is adjacent to the surface of the uppermost of at least two condenser tubes.

[0017] The present invention provides a falling film condenser, which includes at least the condenser tube assembly described in any one of the above-mentioned claims, wherein the condenser tube assembly is mounted on the main frame.

[0018] The refrigeration system of this utility model includes at least the falling film condenser, and also includes an expansion valve, an evaporator and a compressor. The outlet end of the falling film condenser is connected to the inlet end of the expansion valve, the inlet end of the expansion valve is connected to the inlet end of the evaporator, the outlet end of the evaporator is connected to the inlet end of the compressor, and the outlet end of the compressor is connected to the inlet end of the falling film condenser. Beneficial effects

[0019] This utility model solves the above-mentioned existing problems and other existing problems not mentioned above, and brings at least the following innovative advantages:

[0020] This utility model relates to a condenser tube, a condenser tube assembly, a falling film condenser, and a refrigeration system. By adding a non-stick layer, the surface of the tube body has excellent chemical inertness and thermal stability. It has superior non-stick properties, high temperature resistance, a high melting point, and strong resistance to most chemical substances, making it less susceptible to corrosion. In addition, the surface also has the advantage of high smoothness. Thus, covering the surface of the tube body with a non-stick layer makes the surface of the tube body easy to clean.

[0021] This utility model of a condenser tube assembly reduces scaling during use and facilitates cleaning even when only a small amount of scaling has formed. Furthermore, the water distribution pipe's top-down water distribution and the vertical angle of the different condenser tubes ensure that the water from the distribution pipe at least partially covers the surface of the condenser tubes, and the water droplets from different condenser tubes can connect to form a water film. Finally, the combination of the non-stick coating 2 and the water distribution further improves the anti-scaling effect on the condenser tube surface. Attached Figure Description

[0022] Figure 1 A 3D rendering of a straight condenser tube;

[0023] Figure 2 This is a cross-sectional view of the condenser tube of this utility model;

[0024] Figure 3 A 3D rendering of multiple linear condenser tubes arranged in a single line;

[0025] Figure 4 A side view of multiple straight condenser tubes installed on the main frame;

[0026] Figure 5 A top view of multiple straight condenser tubes installed on the main frame;

[0027] Figure 6 Another top view showing multiple straight condenser tubes installed on the main frame;

[0028] Figure 7 A 3D rendering of a condenser tube bent into a U-shape;

[0029] Figure 8 A 3D rendering of multiple U-shaped condenser tubes;

[0030] Figure 9 This is a rendering of the present invention, showing a water distribution pipe installed above the condenser pipe.

[0031] Figure 10 for Figure 9 A magnified view of a portion of region A in the middle;

[0032] Figure 11 A front view of the main frame showing multiple U-shaped condenser pipes installed.

[0033] In the diagram: 1. Pipe body, 2. Non-stick coating, 3. Condenser pipe, 4. Inlet main pipe, 5. Outlet main pipe, 6. Water distribution pipe, 7. Main frame, 8. Water outlet. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings.

[0035] In the accompanying drawings, the same reference numerals represent the same parts. It should be noted that the described embodiments are only some, not all, of the embodiments disclosed herein.

[0036] Based on the embodiments described in this disclosure, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this disclosure. Example 1

[0037] like Figure 1 As shown, the condenser tube of this utility model includes a tube body 1. Figure 2The diagram shows a non-stick coating 2 covering the surface of the tube body 1. The non-stick coating 2 is a fluorine coating, specifically a fluorocarbon resin (Teflon), polytetrafluoroethylene (PTFE), or ceramic coating. Polytetrafluoroethylene, abbreviated as PTFE, is commonly known as "Teflon" and is a fluoropolymer. This invention, by adding the non-stick layer 2, gives the surface of the tube body 1 excellent chemical inertness and thermal stability, superior non-stick properties, high temperature resistance, high melting point, and strong resistance to most chemicals, making it less susceptible to corrosion. Furthermore, the surface also has the advantage of high smoothness, thus making the surface of the tube body 1 easy to clean. Example 2

[0038] like Figures 1 to 11 As shown, this utility model relates to a condenser tube assembly. Figure 3 and Figure 4 It is shown that it includes at least two condenser tubes 3, and the at least two condenser tubes 3 are at least partially parallel to each other; Figure 4 This demonstrates that at least two condenser tubes 3 are vertically stacked, meaning one condenser tube 3 is stacked horizontally above another condenser tube 3; further, see... Figure 2 Each of the condenser tubes 3 has a non-stick coating 2 covering its tube body 1. This invention, by adding the non-stick layer 2, gives the tube body 1 excellent chemical inertness and thermal stability, superior non-stick properties, high temperature resistance, high melting point, and strong resistance to most chemicals, making it less susceptible to corrosion. Furthermore, the surface also has a high degree of smoothness, thus making the surface of the tube body 1 easy to clean. Each of the condenser tubes 3 has an inlet end and an outlet end, such as... Figure 5 and Figure 6 As shown in the diagram, the upper end is the inlet of condenser tube 3, and the lower end is the outlet of condenser tube 3; see also Figure 5 , Figure 6 and Figure 11 It includes a main inlet pipe 4, and at least two inlet ends of the condenser tubes 3 are connected to the main inlet pipe 4;

[0039] It includes an outflow main pipe 5, and the outflow ends of at least two of the condenser tubes 3 are connected to the outflow main pipe 5.

[0040] Further, see Figure 9 and Figure 10 The vertical water supply of the condenser pipe 3 includes a water distribution pipe 6; the water distribution pipe 6 is at a parallel angle to the condenser pipe 3. Figure 10 The water outlet 8 of the water distribution pipe 6 is shown near the surface of the uppermost of the at least two condenser pipes 3.

[0041] This utility model of a condenser tube assembly, by covering the surface of the condenser tube 3 with a non-stick coating 2, reduces scaling during use and facilitates cleaning even when there is a small amount of scaling. In addition, the water distribution pipe 6 distributes water from top to bottom, and the different condenser tubes 3 are at a vertical angle, so that the water in the water distribution pipe 6 can at least partially cover the surface of the condenser tube 3, and the water droplets between different condenser tubes can connect to form a water film. Finally, the combination of the non-stick coating 2 and the water distribution further improves the problem of scale prevention on the surface of the condenser tubes.

[0042] Furthermore, the condenser tube 3 is either straight or bent into a U-shape; wherein Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The images show the effect of condenser tube 3 being in a straight line; among them Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 The image shows a rendering of the condenser tube 3 having a U-shaped structure, and multiple U-shaped structures are also shown; for example... Figures 1 to 11 As shown, regardless of whether the condenser tube 3 is straight or bent into a U-shape, the position of the inlet end of each condenser tube 3 is higher than the position of the outlet end of that condenser tube 3; that is, regardless of whether the condenser tube 3 is straight or bent into a U-shape, as... Figure 4 As shown, the condenser tube 3 appears to be tilted when viewed from the side. Figure 4 The right side is the inlet end of condenser tube 3. Figure 4 The left side of the middle section is the outlet end of the condenser tube 3. In this utility model, the condenser tube assembly sets the inlet end of the condenser tube higher than the outlet end, so that the liquid refrigerant in the condenser tube can flow out better, leaving more heat exchange area for the condenser tube 3 in time.

[0043] Furthermore, the straight condenser tube 3, as... Figure 4 As shown, it appears as a diagonal line from a side view; as Figure 5 and Figure 6 As shown, from a top-down view, they can be arranged at a vertical angle or at an angle. Figure 4 The effect of multiple rows of condenser tubes 3 appearing as multiple diagonal lines when viewed from the side is shown; Figure 5 The image shows the effect of the straight condenser tube 3 being viewed from above as being at a vertical angle; Figure 6 The diagram shows that the straight condenser tube 3 can also be tilted when viewed from a top-down angle. Example 3

[0044] The falling film condenser of this invention includes at least the condenser tube assembly described in Example 2. Figure 4 , Figure 5 , Figure 6 and Figure 11 The images show the condenser coil assembly mounted on the main frame 7. Of course, this main frame 7 is not unique; in application, it can be replaced by the condenser housing. Example 4

[0045] The refrigeration system of this utility model includes at least the falling film condenser described in Embodiment 3, and also includes an expansion valve, an evaporator and a compressor. The outlet end of the falling film condenser is connected to the inlet end of the expansion valve, the inlet end of the expansion valve is connected to the inlet end of the evaporator, the outlet end of the evaporator is connected to the inlet end of the compressor, and the outlet end of the compressor is connected to the inlet end of the falling film condenser.

[0046] The terms "first," "second," and similar words used in the specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" mean that the elements or objects preceding "comprising" cover the elements or objects listed after "comprising" or "including" and their equivalents, but do not exclude other elements or objects. "Above," "below," "left," "right," etc., are only used to indicate relative positional relationships, and these relative positional relationships may also change accordingly when the absolute position of the described object changes.

[0047] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. The scope of protection of the present utility model is defined by the appended claims. For those skilled in the art, other embodiments can be obtained based on the accompanying drawings without creative effort, and any modifications based on the claims of the present utility model are within the scope of protection of the present utility model.

Claims

1. A condenser tube assembly, characterized in that, It includes at least two condenser tubes, which are at least partially parallel; the surface of each condenser tube is covered with a non-stick coating. Each of the aforementioned condenser tubes has an inlet end and an outlet end; Includes a main inlet pipe, and the inlet ends of at least two of the condenser tubes are connected to the main inlet pipe; It includes an outflow main pipe, and the outflow ends of at least two of the condenser tubes are connected to the outflow main pipe.

2. The condenser tube assembly according to claim 1, characterized in that, The condenser tubes are either straight or bent into a U-shape; the inlet end of each condenser tube is positioned higher than the outlet end of that condenser tube.

3. The condenser tube assembly according to claim 2, characterized in that, The condenser tube, which is straight or bent into a U-shape, appears at an angle when viewed from the side.

4. The condenser tube assembly according to claim 2, characterized in that, The straight condenser tubes appear as diagonal lines when viewed from the side; and as vertical or inclined when viewed from above.

5. The condenser tube assembly according to claim 1 or 2, characterized in that, The vertical water supply of the condenser tube has a water distribution pipe; the outlet of the water distribution pipe is adjacent to the surface of the uppermost of at least two condenser tubes.

6. A falling film condenser, characterized in that, It includes at least the condenser tube assembly as described in any one of claims 1 to 5, wherein the condenser tube assembly is mounted on the main frame.

7. A refrigeration system, characterized in that, The device includes at least the falling film condenser as described in claim 6, and further includes an expansion valve, an evaporator, and a compressor. The outlet end of the falling film condenser is connected to the inlet end of the expansion valve, the inlet end of the expansion valve is connected to the inlet end of the evaporator, the outlet end of the evaporator is connected to the inlet end of the compressor, and the outlet end of the compressor is connected to the inlet end of the falling film condenser.

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