Air conditioning system, self-cleaning evaporative condensing system and control method

Abstract

This application relates to the field of air conditioning, and particularly to an air conditioning system, a self-cleaning evaporative condensing system, and a control method. The self-cleaning evaporative condensing system includes a condenser, a fan assembly, a spray assembly, a spray water supply pipe, a solenoid valve, and a variable frequency water pump. The condenser is equipped with an inlet pipe assembly, a liquid outlet pipe, and a heat exchange tube assembly connecting the two. The exhaust port of the fan assembly faces the heat exchange tube assembly, and the spray assembly sprays cooling water onto the heat exchange tube assembly. The variable frequency water pump and the solenoid valve are connected in the spray water supply pipe. In the spray cooling state, the solenoid valve is normally open, and the variable frequency water pump operates at a first speed, causing the spray assembly to spray cooling water onto the heat exchange tube assembly. In the descaling state, the solenoid valve periodically opens and closes, cooperating with the variable frequency water pump at a second speed, to achieve high-pressure and vibration descaling of the heat exchange tube assembly by the spray assembly. The above-mentioned self-cleaning evaporative condensing system can achieve descaling without stopping the system, improving the descaling effect and increasing the descaling efficiency.

Description

Technical Field

[0001] This application relates to the field of air conditioning, and more particularly to an air conditioning system, a self-cleaning evaporative condensation system, and a control method. Background Technology

[0002] Mine air conditioning typically uses evaporative condensers. Due to the underground environment, scale easily forms on the surface of evaporative condensers, which severely restricts the heat exchange efficiency of the refrigerant and consequently affects the cooling efficiency of the air conditioner.

[0003] Current evaporative condensers are typically equipped with descaling devices, but they have the following shortcomings: the outer surface of the heat exchange tubes has fins or grooves, which easily lead to scale buildup during long-term operation, affecting energy efficiency; the inner surface of the heat exchange tubes relies solely on increasing the size to enhance heat exchange, resulting in increased material costs; scale buildup cannot be detected in time, leading to reduced heat exchange efficiency; more importantly, they cannot be automatically cleaned, requiring shutdown for descaling, and the descaling effect is unsatisfactory, resulting in low descaling efficiency, which seriously affects equipment utilization and production efficiency. Summary of the Invention

[0004] This application provides an air conditioning system, a self-cleaning evaporative condenser system, and a control method to improve the descaling effect of evaporative condensers and increase descaling efficiency.

[0005] In a first aspect, this application provides a self-cleaning evaporation-condensation system, comprising:

[0006] The condenser includes an inlet pipe assembly, an outlet pipe, and a heat exchange tube assembly connecting the inlet pipe assembly and the outlet pipe;

[0007] The fan assembly is fixed relative to the condenser and the exhaust port is set to correspond to the heat exchange tube assembly.

[0008] The spray assembly, positioned opposite the outer surface of the condenser, is configured to spray cooling water toward the heat exchange tube assembly;

[0009] Spray water supply pipe, which connects to the spray assembly and supplies cooling water to the spray assembly;

[0010] A solenoid valve is connected to the spray water supply pipe and is configured to open and close periodically in descaling mode.

[0011] A variable frequency water pump is connected to the spray water supply pipe. At a first speed, it delivers cooling water to the spray assembly to spray and cool the heat exchange tube assembly. At a second speed, it delivers cooling water to the spray assembly to perform high-pressure flushing and descaling of the heat exchange tube assembly. The second speed is greater than the first speed.

[0012] In some embodiments, the spray assembly includes:

[0013] The upper spray assembly is located above the condenser and between the condenser and the fan assembly;

[0014] And / or, a front spray assembly is located on the first side of the condenser side;

[0015] And / or, a rear spray assembly is located on the second side of the condenser side, opposite to the first side side.

[0016] In some embodiments, the upper spray assembly includes:

[0017] The main pipeline connects to the sprinkler water supply pipe;

[0018] U-shaped branch pipe, connected to the main pipe and with both ends extending to the outside of the first and second sides of the condenser respectively;

[0019] The front and rear branch pipes are set parallel to each other and are perpendicularly connected to both ends of the U-shaped branch pipe.

[0020] The upper spray branch pipes are arranged in parallel to each other and vertically connected between the front water distribution pipe and the rear water distribution pipe;

[0021] The first nozzle is connected to the spray branch pipe and positioned towards the heat exchange tube assembly.

[0022] In some embodiments, both the front spray assembly and the rear spray assembly include:

[0023] The main water distribution pipe connects to the sprinkler water supply pipe;

[0024] Side spray branch pipes are arranged parallel to each other and vertically connected to the main water distribution pipe;

[0025] The second nozzle is connected to the side spray branch pipe and is positioned towards the heat exchange tube assembly.

[0026] In some embodiments, the first nozzles of adjacent upper spray branch pipes are misaligned;

[0027] And / or, the second nozzles of adjacent side spray branches are staggered;

[0028] And / or, the second nozzles of the side spray branches of the front spray assembly and the rear spray assembly are misaligned.

[0029] In some embodiments, the condenser includes:

[0030] The front side panel is located on its first side.

[0031] The rear side panel is located on its second side opposite to the first side panel;

[0032] The gas-liquid separation and collection chamber is located on its third side.

[0033] The reversing chamber is located on its fourth side, opposite to the third side.

[0034] The heat exchange tube assembly connects the gas distribution and liquid collection chamber and the reversing chamber, while the inlet pipe assembly and the outlet pipe are both connected to the gas distribution and liquid collection chamber.

[0035] In some embodiments, the upper spray branch pipe is provided with a first connector, and the first nozzle is provided with a stud cavity that is threadedly connected to the first connector;

[0036] Both the front and rear side panels are provided with threaded sleeves, and the side spray branch pipes are provided with second connectors. The second nozzle includes a first stud section that mates with the second connector, and a second stud section that penetrates the front or rear side panel and mates with the threaded sleeves.

[0037] In some embodiments, both the first nozzle and the second nozzle include a frustum at the end of the nozzle, a central spray hole is formed at the center of the frustum, and a plurality of radial spray holes are formed on the side of the frustum in the circumferential direction.

[0038] In some embodiments, both the central nozzle and the radial nozzle include a transition section, a guide section, and a diffuser section;

[0039] The transition section, the guide section, and the diffuser section are sequentially arranged from the inside of the first nozzle or the second nozzle outwards;

[0040] The transition section is set to gradually narrow from the inside of the first nozzle or the second nozzle to the outside, the guide section is set to have a constant diameter, and the diffuser section is set to gradually expand from the inside of the first nozzle or the second nozzle to the outside.

[0041] In some embodiments, the gas-liquid separation chamber includes:

[0042] The left sealing plate and the left side plate interlock to form the first closed chamber;

[0043] The first horizontal partition and the second horizontal partition are arranged parallel to each other and vertically connected between the left sealing plate and the left side plate, and divide the first closed chamber into an upper gas distribution zone, a middle first reversing zone and a lower liquid collection zone.

[0044] The air inlet pipe assembly is connected to the left sealing plate and communicates with the air distribution area; the liquid outlet pipe is connected to the left sealing plate and communicates with the liquid collection area.

[0045] The switching room includes:

[0046] The right sealing plate and the right side plate interlock to form a second closed chamber;

[0047] The third horizontal partition is vertically connected between the right sealing plate and the right side plate and divides the second enclosed chamber into the upper second reversing area and the lower third reversing area;

[0048] The heat exchange tube assembly is connected between the left and right side plates. The second reversing zone is connected to the gas distribution zone and the first reversing zone through the heat exchange tube assembly. The first reversing zone is connected to the third reversing zone through the heat exchange tube assembly. The third reversing zone is connected to the liquid collection zone through the heat exchange tube assembly.

[0049] In some embodiments, the heat exchange tube assembly includes a plurality of parallel and arrayed irregularly shaped heat exchange tubes; the lower part of the irregularly shaped heat exchange tubes away from the fan assembly is arc-shaped, and the width of the upper part of the irregularly shaped heat exchange tubes near the fan assembly gradually increases from the direction near the fan assembly to the direction away from the fan assembly.

[0050] In some embodiments, the inner wall of the shaped heat exchange tube is provided with spiral grooves; and / or, the shaped heat exchange tube has a preset elastic deformation capability.

[0051] In some embodiments, the self-cleaning evaporative condensation system satisfies at least one of the following:

[0052] The sprinkler water supply pipe is equipped with a flow detection device;

[0053] An unloading valve is installed between the solenoid valve and the variable frequency water pump in the sprinkler water supply pipe;

[0054] The outlet pipe is equipped with a first temperature sensor;

[0055] A drip tray is installed below the condenser;

[0056] The sprinkler water supply pipe is equipped with a second temperature sensor, and the water receiving tray is equipped with a third temperature sensor.

[0057] The sprinkler water supply pipe is equipped with a filter device;

[0058] It also includes a control module, which is electrically connected to the first temperature sensor, the second temperature sensor, the third temperature sensor, the flow detection device, the unloading valve, the solenoid valve, and the variable frequency water pump.

[0059] Secondly, this application provides an air conditioning system that utilizes any of the above-mentioned self-cleaning evaporative condensation systems.

[0060] Thirdly, this application provides a control method for a self-cleaning evaporation-condensation system, applied to the aforementioned self-cleaning evaporation-condensation system, comprising:

[0061] Detect and determine if the condenser is in a scaling state;

[0062] If so, the variable frequency water pump is switched to the second speed, and the solenoid valve is periodically opened and closed to achieve high-pressure vibration descaling of the heat exchange tube assembly by the spray assembly.

[0063] If not, maintain the variable frequency water pump at the first speed and adjust the solenoid valve to be open to achieve spray cooling of the heat exchange tube assembly by the spray assembly.

[0064] In some embodiments, the step of detecting and determining whether the condenser is in a scaling state includes:

[0065] Detect the real-time outlet temperature t of the refrigerant at the outlet pipe;

[0066] Compare the real-time outlet temperature t with the standard outlet temperature t m contrast;

[0067] If t > t m If the value is +Δt, then the condenser is determined to be in a scaling state.

[0068] Where Δt is the allowable temperature deviation.

[0069] In some embodiments, the step of detecting the real-time outlet temperature t of the refrigerant at the outlet pipe and the step of controlling the variable frequency water pump to switch to the second speed further includes:

[0070] The steps between detecting the real-time outlet temperature t of the refrigerant at the outlet pipe and controlling the variable frequency water pump to switch to the second speed also include:

[0071] Detect the cooling water flow rate. If the cooling water flow rate deviates from the set flow rate, adjust the cooling water flow rate to the set flow rate and return to the step of detecting the real-time outlet temperature t of the refrigerant at the outlet pipe.

[0072] The temperature of the cooling water supplied to the spray assembly is detected. If the temperature of the cooling water deviates from the set temperature, the temperature of the cooling water is adjusted to the set temperature, and the process returns to the step of detecting the real-time outlet temperature t of the refrigerant at the outlet pipe.

[0073] Detect the speed of the fan assembly. If the speed of the fan assembly deviates from the set speed, adjust the fan assembly to the set speed and return to the step of detecting the real-time liquid temperature t of the refrigerant at the liquid outlet pipe.

[0074] When the flow rate of cooling water, the temperature of cooling water supplied to the spray assembly, and the speed of the fan assembly all do not deviate from the set values, the variable frequency water pump is switched to the second speed and the solenoid valve is periodically opened and closed to realize the step of high-pressure vibration descaling of the heat exchange tube assembly by the spray assembly.

[0075] Compared with the prior art, the technical solution provided in this application has the following advantages: When the condenser and heat exchanger tube assembly are free of scale, gaseous refrigerant flows from the compressor through the inlet pipe assembly into the heat exchanger tube assembly for condensation. The condensed liquid refrigerant flows out from the outlet pipe and towards the evaporator. During this process, the solenoid valve is normally open, and the variable frequency water pump supplies cooling water to the spray assembly through the spray water supply pipe at a lower first speed. The spray assembly sprays cooling water onto the heat exchanger tube assembly, and after heat exchange with the heat exchanger tube assembly, it works with the fan assembly to remove the heat. When the heat exchanger assembly is scaled, the solenoid valve switches to a periodic opening and closing state, and the variable frequency water pump operates at a higher second speed, increasing the pressure of the cooling water sprayed onto the heat exchanger tube assembly by the spray assembly, achieving high-pressure descaling. The periodic opening and closing of the solenoid valve causes the spray assembly to periodically spray cooling water, achieving vibration descaling of the heat exchanger tube assembly and achieving descaling without stopping the system. The above self-cleaning evaporative condensation system can descale without stopping the system. High-pressure intermittent water spray achieves high-pressure pulse + vibration descaling, ensuring the descaling effect while significantly improving the descaling efficiency. Attached Figure Description

[0076] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0077] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0078] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0079] Figure 1 This is a schematic diagram of a self-cleaning evaporation and condensation system provided in an embodiment of this application;

[0080] Figure 2 for Figure 1 Partial sectional view of the intermediate condenser;

[0081] Figure 3 for Figure 1 Structural diagram of the upper and middle spray assembly;

[0082] Figure 4 for Figure 1 Structural diagram of the front or rear spray assembly;

[0083] Figure 5 for Figure 3 Structural diagram of the first nozzle;

[0084] Figure 6 for Figure 4 Structural diagram of the second nozzle;

[0085] Figure 7 for Figure 3 A schematic diagram of the installation of the first nozzle in the middle;

[0086] Figure 8 for Figure 2 Schematic diagram of the installation of the second nozzle;

[0087] Figure 9 for Figure 5 Enlarged view of part A in the image;

[0088] Figure 10 for Figure 1 Schematic diagram of the central intake manifold assembly;

[0089] Figure 11 for Figure 1 Schematic diagram of the gas-liquid collection chamber;

[0090] Figure 12 for Figure 1 Schematic diagram of the central switching room;

[0091] Figure 13 for Figure 1 Longitudinal sectional view of a non-standard heat exchange tube;

[0092] Figure 14 for Figure 1 Cross-sectional view of a non-standard heat exchange tube;

[0093] Figure 15 A flowchart of a self-cleaning evaporation-condensation system control method provided in one embodiment of this application;

[0094] Figure 16 for Figure 15 Sub-flowchart of the control method for the provided self-cleaning evaporative condensation system;

[0095] Figure 17 A flowchart of a self-cleaning evaporation-condensation system control method provided in another embodiment of this application;

[0096] Figure 18 A flowchart of a self-cleaning evaporative condensation system control method provided in another embodiment of this application.

[0097] Explanation of reference numerals in the attached figures:

[0098] 100-Condenser; 110-Inlet pipe assembly; 111-Main gas distribution pipe; 112-Branch gas distribution pipe; 120-Liquid outlet pipe; 121-First temperature sensor; 130-Irregularly shaped heat exchange tube; 131-Elliptical segment; 132-Tangential segment; 133-Arc segment; 134-Helical groove; 140-Front side plate; 141-Threaded sleeve; 150-Gas distribution and liquid collection chamber; 151-Left sealing plate; 152-Left side Plate; 153-First horizontal partition; 154-Second horizontal partition; 155-First vertical partition; 156-Second vertical partition; 157-Gas distribution zone; 158-First reversing zone; 159-Liquid collection zone; 160-Reversing chamber; 161-Right sealing plate; 162-Right side plate; 163-Third horizontal partition; 164-Third vertical partition; 165-Second reversing zone; 166-Third reversing zone.

[0099] 200 - Fan assembly; 201 - Fixed housing;

[0100] 300 - Top spray assembly; 310 - Main pipe; 320 - U-shaped branch pipe; 330 - Front branch pipe; 340 - Rear branch pipe; 350 - Top spray branch pipe; 360 - First connector;

[0101] 400 - Front spray assembly; 410 - Main water distribution pipe; 420 - Side spray branch pipe; 430 - Second connector;

[0102] 500-rear spray assembly;

[0103] 600 - First nozzle; 610 - Central nozzle; 620 - Radial nozzle; 621 - Transition section; 622 - Guide section; 623 - Diffusion section; 630 - First fastening part;

[0104] 700 - Second nozzle; 710 - First stud section; 720 - Second stud section; 730 - Second fastening part;

[0105] 800-Sprinkler water supply pipe; 810-Variable frequency water pump; 820-Flow detection device; 830-Unloading valve; 840-Solenoid valve; 850-Second temperature sensor;

[0106] 900-Control Module. Detailed Implementation

[0107] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0108] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0109] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0110] In order to solve the technical problems of easy scaling and low descaling efficiency in the evaporative condenser 100 of the mine air conditioner in the prior art, this application provides an air conditioning system, a self-cleaning evaporative condensation system and a control method, which can achieve descaling of the condenser 100 without stopping the machine, significantly improve the descaling efficiency while ensuring and improving the descaling effect.

[0111] The self-cleaning evaporative condensation system provided in this application embodiment is as follows: Figure 1 and Figure 2As shown, the self-cleaning evaporative condensation system mainly includes a condenser 100, a fan assembly 200, a spray assembly, a spray water supply pipe 800, a solenoid valve 840, and a variable frequency water pump 810. The condenser 100 is equipped with an inlet pipe assembly 110, a liquid outlet pipe 120, and a heat exchange tube assembly. The heat exchange tube assembly connects the inlet pipe assembly 110 and the liquid outlet pipe 120, and is used to exchange heat with the external environment and the sprayed cooling water to liquefy the gaseous refrigerant; the inlet pipe assembly 110 is used to introduce the high-pressure gaseous refrigerant discharged from the compressor, and the liquid outlet pipe 120 is used to transport the condensed liquid refrigerant to the evaporator. The spray assembly is positioned opposite the outer surface of the condenser 100 and is used to spray cooling water onto the condenser 100 and its heat exchange tube assembly. The cooling water forms a water film on the surface of the heat exchange tube assembly and evaporates, carrying away the heat of the refrigerant. The exhaust port of the fan assembly 200 is positioned towards the heat exchange tube assembly to carry away the heat in the air around the heat exchange tube assembly, accelerate the evaporation of the water film, and enhance the heat exchange between the refrigerant and the external environment and the sprayed cooling water through the heat exchange tube assembly.

[0112] The spray water supply pipe 800 is connected to the spray assembly and is used to supply cooling water for spraying. A variable frequency water pump 810 and a solenoid valve 840 are connected in the spray water supply pipe 800. The variable frequency water pump 810 provides spray power for the cooling water and can adjust its operating speed to change the pressure of the spray water; the solenoid valve 840 controls the on / off state of the spray water. In this embodiment, when the self-cleaning evaporative condensation system operates without scale buildup on the condenser 100 and heat exchange tube assembly: the solenoid valve 840 remains normally open, and the variable frequency water pump 810 operates at a relatively low first speed, continuously spraying water onto the surface of the condenser 100 and its heat exchange tube assembly through the spray assembly. When scale forms on the surface of the condenser 100 and its heat exchange tubes, the solenoid valve 840 is adjusted to periodically open and close, while the variable frequency water pump 810 is adjusted to operate at a relatively high second speed, increasing the pressure of the spray cooling water to achieve high-pressure spray descaling. Simultaneously, the periodic opening and closing of the solenoid valve 840 causes the spray assembly to intermittently spray water, achieving vibration descaling. The aforementioned setup of the spray assembly, spray water supply pipe 800, solenoid valve 840, and variable frequency water pump 810 enables descaling without shutting down the system. Furthermore, the combination of high-pressure pulse descaling and vibration descaling improves the descaling effect and significantly enhances descaling efficiency.

[0113] Its descaling principle utilizes high-pressure pulsed water spraying combined with vibration descaling to achieve efficient and timely descaling. Let the pressure resistance of the scale be σ, and the water spray pressure be P1. When P1 ≥ σ, the scale cracks, and most of it detaches from the adhesion surface under the impact of the water spray. During descaling operation, the water spraying is intermittent, with a spraying time of T1 and a stop time of T2, where T1 ≥ T2. T1 and T2 can be set according to actual usage conditions. Thus, under the vibration force of the intermittent pulsed water spray, the heat exchange tube assembly vibrates, forcing the scale adhering to it to detach more quickly and completely.

[0114] It should be understood that the first and second speeds are not uniquely determined values. Depending on the different temperature control requirements of the air conditioning system and the varying degrees of scaling on the heat exchanger tube components, the first and second speeds can be adjusted as needed. The opening and closing cycle or frequency of the solenoid valve 840 can also be adjusted as required. The fan assembly 200 typically uses an axial flow fan and is fixed to the top of the condenser 100 via a fixed housing 201.

[0115] In a preferred embodiment provided in this application, the spray assembly includes an upper spray assembly 300, a front spray assembly 400, and a rear spray assembly 500. Multi-angle spraying for cooling and descaling is achieved using these three components. The upper spray assembly 300 is mounted above the condenser 100 using clamps or other fasteners. The fan assembly 200 is located above the upper spray assembly 300, meaning the upper spray assembly 300 is fixed between the fan assembly 200 and the condenser 100. The front spray assembly 400 is located on a first side of the condenser 100, and the rear spray assembly 500 is located on a second side of the condenser 100. The first and second sides are typically a pair of parallel, opposite sides. The left and right sides of the condenser 100, which house the inlet pipe assembly 110, the outlet pipe 120, and the refrigerant reversing side, typically do not have spray structures.

[0116] To improve the spray cooling and descaling effects, the water flow rate of the upper spray assembly 300 from top to bottom is Q1, the water flow rate of the front spray assembly 400 from front to back is Q2, and the water flow rate of the rear spray assembly 500 from back to front is Q3. The relationship between the three is Q2 = Q3, Q1 ≥ K*(Q2 + Q3), where K is a coefficient with a value ranging from 9 to 10. Simultaneously, air flows upwards from bottom to top on the outside of the heat exchange tube assembly driven by the fan assembly 200. Thus, the heat from the refrigerant condensation inside the tubes is transferred to the air and spray water through refrigerant condensation → heat exchange in the heat exchange tube assembly → evaporation of the water film outside the tubes.

[0117] It is worth mentioning that the arrangement of the spray assembly is not limited to the above-mentioned structure of upper spray assembly 300, front spray assembly 400 and rear spray assembly 500. Under the premise of satisfying spray cooling and descaling, only upper spray assembly 300 can be set, or front spray assembly 400 and rear spray assembly 500 can be set on the front and rear sides of condenser 100.

[0118] See Figure 1 and Figure 3In some embodiments, the upper spray assembly 300 includes a main pipe 310, a U-shaped branch pipe 320, a front water distribution pipe 330, a rear water distribution pipe 340, an upper spray branch pipe 350, and a first nozzle 600. The spray water supply pipe 800 connects the main pipe 310, the front spray assembly 400, and the rear spray assembly 500 via a multi-connector. The main pipe 310 is vertically connected to the U-shaped branch pipe 320, which extends substantially perpendicular to the first and second sides of the condenser 100, with both ends extending to the outer sides of the first and second sides, respectively. The front water distribution pipe 330 and the rear water distribution pipe 340 are fixed at a predetermined height above the first and second sides of the condenser 100 using clamps or other fasteners. Furthermore, the front water distribution pipe 330 is located on the outer side of the first side of the condenser 100, and the rear water distribution pipe 340 is located on the outer side of the second side of the condenser 100. Both are vertically connected to the U-shaped branch pipe 320. Multiple upper spray branch pipes 350 are arranged parallel to each other and vertically connected between the front water distribution pipe 330 and the rear water distribution pipe 340. Each upper spray branch pipe 350 has a first nozzle 600 facing the lower surface of the heat exchange tube assembly, and the first nozzles 600 of adjacent upper spray branch pipes 350 are preferably staggered.

[0119] See Figure 1 , Figure 2 and Figure 4 The front spray assembly 400 and the rear spray assembly 500 have largely the same structure, both including a main water distribution pipe 410, side spray branch pipes 420, and a second nozzle 700. Taking the configuration of the front spray assembly 400 as an example, the main water distribution pipe 410 is located at one end of the outer side of the first side of the condenser 100. The main water distribution pipe 410 is flexibly connected to the spray water supply pipe 800 through a flexible hose and a multi-way connector. Multiple sets of side spray branch pipes 420 are arranged parallel to each other, and the multiple sets of side spray branch pipes 420 are generally perpendicularly connected to the main water distribution pipe 410. The second nozzle 700 is located on the side of the side spray branch pipe 420 facing the first side of the condenser 100, and the spray hole of the second nozzle 700 is facing the heat exchange tube assembly. The second nozzles 700 of the side spray branch pipes 420 of adjacent layers are preferably staggered. The second nozzles 700 on the side spray branch pipes 420 of the same layer of the front spray assembly 400 and the rear spray assembly 500 are preferably staggered. This arrangement promotes uniform water spraying, increases the contact area between the heat exchange tube assembly and the sprayed water, enhances heat exchange, and improves the descaling effect.

[0120] See Figure 1 and Figure 2The condenser 100 includes a front side plate 140, a rear side plate, a gas-liquid distribution chamber 150, a reversing chamber 160, and a heat exchange tube assembly. The front side plate 140 is located on the first side of the condenser 100 and is used to mount and fix the second nozzle 700 of the front spray assembly 400. The rear side plate is located on the second side of the condenser 100, opposite to the first side, and is used to mount and fix the second nozzle 700 of the rear spray assembly 500. The gas-liquid distribution chamber 150 is located on the third side of the condenser 100 and connects the front side plate 140 and the rear side plate. The third side is generally perpendicular to the first and second sides. The inlet pipe assembly 110 and the outlet pipe 120 communicate with the gas-liquid distribution chamber 150. The reversing chamber 160 is located on the fourth side of the condenser 100 and is connected to the front side plate 140 and the rear side plate. The fourth side is generally perpendicular to the first side and the second side, that is, it is generally parallel to the third side. The reversing chamber 160 is used to allow the refrigerant to be reversed and return to the gas-liquid distribution chamber 150.

[0121] To improve the spray cooling and descaling effects, the structures of the first nozzle 600 and the second nozzle 700 are as follows: Figure 5 , Figure 6 and Figure 9 As shown, both the first nozzle 600 and the second nozzle 700 have hollow frustum-shaped portions at their ends. These frustum-shaped portions are used to machine the spray holes, increasing the spray coverage area, eliminating dry water film zones and descaling dead zones, and enhancing heat transfer. A central spray hole 610 is formed at the center of the axial end of the frustum-shaped portion, and several radial spray holes 620 are arrayed circumferentially on the periphery of the frustum-shaped portion. There is at least one central spray hole 610; at least three radial spray holes 620 are perpendicular to the side of the frustum-shaped portion and are arranged in an array around the central spray hole 610. The radial spray holes 620 and the central spray hole 610 form a certain spatial angle, the size of which depends on the staggered arrangement of the heat exchange tube assembly. The purpose is to eliminate dry water film zones and descaling dead zones in the heat exchange tube assembly and enhance heat transfer.

[0122] Furthermore, both the central nozzle 610 and the radial nozzle 620 include a transition section 621, a guide section 622, and a diffuser section 623, which extend sequentially from the inside of the nozzle to the outside. The transition section 621 is arranged in an arc shape and gradually narrows from the inside of the first nozzle 600 or the second nozzle 700 to the outside. The guide section 622 is of constant diameter, and the diffuser section 623 is arranged to gradually expand from the inside of the first nozzle 600 or the second nozzle 700 to the outside. That is, the central nozzle 610 and the radial nozzle 620 have a structure similar to a Venturi nozzle, which reduces flow resistance while increasing the spray diffusion angle.

[0123] See Figure 10 and Figure 11The gas distribution and liquid collection chamber 150 is used to evenly distribute the compressor exhaust and collect the condensed refrigerant liquid; the inlet pipe assembly 110 is the channel for the exhaust to enter the gas distribution and liquid collection chamber 150, and adopts a two-to-three connection method with one branch pipe to the main gas distribution pipe 111 and the main gas distribution pipe 111 connecting to three branch pipes 112, which is conducive to uniform gas distribution and reduces flow resistance; the front side plate 140 and the rear side plate are welded together with the gas distribution and liquid collection chamber 150 and the reversing chamber 160 to form a frame, which plays a supporting and sealing role; the spray assembly is fixed to the frame structure by brackets and clamps.

[0124] In some embodiments, the gas-distribution and liquid-collecting chamber 150 includes a left sealing plate 151, a left side plate 152, a first horizontal partition 153, a second horizontal partition 154, a first vertical partition 155, and a second vertical partition 156; the reversing chamber 160 includes a right sealing plate 161, a right side plate 162, a third horizontal partition 163, and a third vertical partition 164. The left sealing plate 151 and the left side plate 152 are joined together to form a first closed chamber. The first horizontal partition 153 and the second horizontal partition 154 are horizontally arranged and vertically connected between the left sealing plate 151 and the left side plate 152, dividing the first closed chamber into three layers: an upper layer (gas distribution zone 157), a middle layer (first reversing zone 158), and a lower layer (liquid collection zone 159). The first vertical partition 155 is perpendicular to the first horizontal partition 153, dividing the upper gas distribution zone 157 into three sub-zones. Three gas distribution branch pipes 112 are connected to the three sub-zones through the left sealing plate 151. The second vertical partition 156 divides the first reversing zone 158 into two reversing sub-zones, and the liquid outlet pipe 120 is connected to the lower liquid collection zone 159 through the left sealing plate 151.

[0125] The right sealing plate 161 and the right side plate 162 are joined together to form a second closed chamber. A third horizontal partition 163 is horizontally positioned and vertically connected between the right sealing plate 161 and the right side plate 162, dividing the second closed chamber into upper and lower layers. The upper layer is the second reversing zone 165, and the lower layer is the third reversing zone 166. A third vertical partition 164 is positioned perpendicular to the third horizontal partition 163, dividing the second reversing zone 165 into two reversing sub-zones. The first reversing zone 158, the second reversing zone 165, and the third reversing zone 166 are staggered vertically. The second reversing zone 165 is connected to the gas distribution zone 157 and the first reversing zone 158 through a heat exchange tube assembly. The first reversing zone 158 is connected to the third reversing zone 166 through a heat exchange tube assembly. The third reversing zone 166 is connected to the liquid collection zone 159 through a heat exchange tube assembly. Gaseous refrigerant enters from the inlet pipe assembly 110, splits into two and enters the main gas distribution pipe 111. At the connection between the main gas distribution pipe 111 and the branch pipe 112, it splits into three sub-regions leading to the gas distribution zone 157. It flows through the heat exchange pipe assembly to the second reversing zone 165 to achieve the first reversal. After the reversal, it enters the first reversing zone 158 through the heat exchange pipe assembly to complete the second reversal. Then, it enters the third reversing zone 166 through the heat exchange pipe assembly to complete the third reversal. Finally, it accumulates in the liquid collection zone 159 and is transported to the evaporator through the liquid outlet pipe 120.

[0126] This structure enables uniform gas distribution and heat exchange among the heat exchange tubes of the heat exchange tube assembly, allowing for low flow resistance and ultimately achieving uniform liquid outlet temperature. It also improves the pressure-bearing capacity of the gas distribution and liquid collection chamber 150.

[0127] For further reference, please refer to the structure and installation structure of the first nozzle 600 and the second nozzle 700. Figures 5 to 9 The upper spray branch pipe 350 is provided with a first connector 360, which has an external thread. The first nozzle 600 is a cap-shaped nozzle with a threaded cavity that mates with the external thread of the first connector 360. To facilitate the installation of the first nozzle 600, a first fastening part 630 is also provided on the outer periphery of the first nozzle 600. The first fastening part 630 is hexagonal, which facilitates the installation of the first nozzle 600 onto the upper spray branch pipe 350 using a wrench. The front side plate 140 and the rear side plate are provided with an array of threaded sleeves 141. The side spray branch pipe 420 is provided with a second connector 430, which has an internal thread. The second nozzle 700 includes a first stud section 710 that mates with the internal thread of the second connector 430, and a second stud section 720 that penetrates the front side plate 140 or the rear side plate and mates with the threaded sleeve 141. To facilitate the installation of the second nozzle 700, the second nozzle 700 also includes a second fastening part 730 disposed between the first stud section 710 and the second stud section 720. The second fastening part 730 is also hexagonal so that the second nozzle 700 can be installed and fixed by a wrench.

[0128] In some embodiments, the commutator assembly is configured as follows: Figure 1, Figure 2 , Figure 13 and Figure 14 As shown, the commutator assembly includes multiple arrayed irregularly shaped heat exchange tubes 130, with both ends of the irregularly shaped heat exchange tubes 130 welded to the left side plate 152 and the right side plate 162. The irregularly shaped heat exchange tubes 130 are arranged in layers, with equal spacing within the same layer and staggered arrangement between adjacent layers. Three adjacent irregularly shaped heat exchange tubes 130 between two adjacent layers form an isosceles triangle. An irregularly shaped heat exchange tube 130 refers to a heat exchange tube with an unconventional round or flat shape. The lower part of the cross-section of the irregularly shaped heat exchange tube 130 is an arc-shaped tube, and the width gradually increases from top to bottom. All irregularly shaped heat exchange tubes 130 are positioned with their narrower ends facing the fan assembly 200.

[0129] For example, the cross-section of the irregularly shaped heat exchange tube 130 is composed of an elliptical arc, a circular arc, and a tangent. The lower part of the cross-section of the irregularly shaped heat exchange tube 130 is elliptical, with the major axis of the elliptical arc horizontal; the upper part includes a circular arc segment 133 and a tangent segment 132, with the tangent segment 132 connecting the elliptical segment 131 and the circular arc segment 133. This arrangement increases the orthogonal area between the air, the sprayed water, and the irregularly shaped heat exchange tube 130, reduces the influence of air wake, and facilitates water film formation and vaporization, thereby enhancing heat transfer and achieving energy saving. The irregularly shaped heat exchange tube 130 is made of a metal material with good thermal conductivity, corrosion resistance, and strength. Its smooth outer surface effectively inhibits scale formation. Its inner surface is machined with spiral grooves 134, increasing the heat transfer area and enhancing heat transfer. In addition, when the refrigerant flows near the wall, it generates an additional vortex perpendicular to the mainstream direction, which reduces the boundary layer thickness, reduces thermal resistance, and increases the temperature gradient between the laminar flow and the wall, further enhancing heat transfer. As the vortex is about to disappear, the refrigerant passes through the next spiral groove 134, generating a new vortex. This process repeats continuously, maintaining a stable and enhanced heat transfer effect.

[0130] Simultaneously, as the refrigerant enters and exits the spiral groove 134, it periodically undergoes contraction and expansion movements, promoting convection disturbance between the center and near-wall fluid, thus enhancing heat transfer. The shaped heat exchange tube 130 has a preset elasticity, generating vibration under the action of the pulse jet flow. During automatic cleaning mode (i.e., descaling), this vibration creates strong disturbances within and outside the viscous boundary layer of the shaped heat exchange tube 130, significantly enhancing the heat transfer effect. The main structural parameters of the shaped heat exchange tube 130 are: total width L = 25±2mm, total height H = 16±1.5mm, radius of curvature R = 2.5~3mm, tooth tip angle α = 25~35°mm, wall thickness δ = 0.8±0.2mm, tooth tip height h = 0.4±0.1mm, and the pitch P of the spiral groove 134 = 2~3mm.

[0131] In some embodiments, the spray water supply pipe 800 is equipped with a flow detection device 820 to facilitate the detection and adjustment of the spray cooling water flow rate. An unloading valve 830 is installed between the solenoid valve 840 and the variable frequency water pump 810 in the spray water supply pipe 800. The unloading valve 830 controls the pressure of the spray water to ensure safe system operation. When the pressure before the solenoid valve 840 exceeds a set pressure value, the unloading valve 830 automatically opens to release pressure. A water receiving tray is installed below the condenser 100 to collect the spray water. The pump inlet of the variable frequency water pump 810 is connected to the water receiving tray to achieve the recycling of the spray water. Furthermore, a filter device can be installed in the spray water supply pipe 800 before the water receiving tray and the pump inlet of the variable frequency water pump 810 to improve the spray water quality, reduce scale formation on the heat exchange tube assembly surface from impurities in the spray water, and extend the service life of the variable frequency water pump 810 and the solenoid valve 840.

[0132] Based on the above embodiments, the self-cleaning evaporative condensation system provided in this application further includes a control module 900 and a temperature detection unit. The control module 900 is electrically connected to the temperature detection unit, flow detection device 820, solenoid valve 840, and variable frequency water pump 810 to automatically determine whether the heat exchange tube assembly is scaled and whether descaling is required, thus achieving automatic cleaning and descaling of the system. The specific principle is as follows:

[0133] The temperature detection unit can be a first temperature sensor 121 installed at the liquid outlet pipe 120. The first temperature sensor 121 detects the real-time liquid outlet temperature t of the liquid refrigerant and feeds it back to the control module 900. When the real-time liquid outlet temperature deviates from the set temperature by a certain value, it indicates that the heat transfer of the heat exchange tube assembly has deteriorated, that is, there is scaling on the surface of the heat exchange tube assembly. The control module 900 controls the solenoid valve 840 and the variable frequency water pump 810 to automatically switch to the descaling mode / automatic cleaning mode to perform descaling.

[0134] The temperature detection unit can include not only a first temperature sensor 121 located at the outlet pipe 120, but also a second temperature sensor 850 located at the spray water supply pipe 800 to detect the temperature of the spray cooling water supplied from the spray water supply pipe 800 to the spray assembly, and a third temperature sensor located at the water receiving pan to detect the temperature of the spray water after heat exchange. The temperature difference detected by the second and third temperature sensors is used to determine the heat exchange between the refrigerant and the spray cooling water, thereby determining whether scaling occurs on the heat exchange tube assembly. For example, when the temperature difference detected by the second and third temperature sensors is less than a set value, it indicates insufficient heat exchange between the spray cooling water and the refrigerant through the heat exchange tube assembly, meaning scaling exists on the surface of the heat exchange tube assembly. The control module 900 can use a PLC, microcontroller, or industrial computer to implement the relevant control logic, which will not be elaborated here.

[0135] The self-cleaning evaporation and condensation system provided in this application has an automatic cleaning function, which can monitor, analyze and judge the scaling status in real time, realize descaling without stopping the machine and timely descaling, and greatly improve equipment utilization and production efficiency.

[0136] By utilizing the enhanced heat exchange inside the tubes of the 130-shaped heat exchange tubes, vibration disturbance, and water film evaporation heat exchange outside the tubes, a tube chamber high-efficiency heat exchanger with nozzles, a spray assembly and nozzles with uniform water spraying are adopted. High-pressure pulse spraying is used to excite and remove scale, which effectively improves the heat exchange efficiency. At the same time, the heat exchange tube assembly and nozzles with low flow resistance are used to reduce the power consumption of the fan, resulting in an overall energy saving of 20% to 30%.

[0137] The upper spray assembly 300, the front spray assembly 400, and the rear spray assembly 500 can be connected by flexible pipes, making them detachable and replaceable; the first nozzle 600 and the second nozzle 700 can both be replaced individually, reducing maintenance costs. The staggered nozzle arrangement structure of the spray assembly, as well as the setting of the central spray hole 610 and the radial spray holes 620, improves the uniformity of spray cooling and descaling.

[0138] This application provides an air conditioning system, including a compressor, an electronic reversing valve, a throttle valve, an evaporator, and the self-cleaning evaporative condensation system provided in the above embodiments. The connection structure and other parts of the air conditioning system are based on the prior art and will not be described in detail here.

[0139] This application also provides a control method for a self-cleaning evaporative condensation system, applicable to the operation control of the self-cleaning evaporative condensation system provided in the above embodiments. The control method is as follows: Figure 15 As shown, it includes:

[0140] Step S100: Detect and determine whether the condenser 100 is in a scaling state;

[0141] Step S200: If so, control the variable frequency water pump 810 to switch to the second speed and adjust the solenoid valve 840 to open and close periodically to realize the high-pressure vibration descaling of the heat exchange tube assembly by the spray assembly.

[0142] Step S300: If not, maintain the variable frequency water pump 810 at the first speed, adjust the solenoid valve 840 to be normally open, and realize the spray assembly spraying the heat exchange tube assembly for cooling.

[0143] There are several methods for detecting and judging whether the condenser 100 and its heat exchange tube assembly are in a scaling state in step S100. The main principle is to judge whether the heat transfer of the condenser 100 and its heat exchange tube assembly has deteriorated, that is, whether scaling has occurred, by detecting the heat exchange of the refrigerant or the spray water.

[0144] In one feasible implementation, the process of detecting and determining whether the condenser 100 is scaled is as follows: Figure 16As shown, the process includes: Step S101: Detecting the real-time outlet temperature t of the refrigerant at the outlet pipe 120, specifically by setting a first temperature sensor 121 at the outlet pipe 120 for detection; Step S102: Comparing the real-time outlet temperature t with the standard outlet temperature t m In comparison, if t > t m If the temperature deviation is +Δt, then condenser 100 is determined to be in a scaling state; Δt is the allowable temperature deviation, the so-called standard outlet liquid temperature t m This refers to the refrigerant outlet temperature when the spray flow rate is constant, the ambient temperature is stable, the fan assembly speed (200) is constant, and the condenser (100) is free of scale. This temperature can be obtained through historical data and stored in the control module (900). The detected real-time outlet temperature (t) is compared with the standard outlet temperature (tstandard). m In comparison, if t > t m +Δt indicates that the real-time outlet temperature t of the refrigerant is too high, the condenser 100 has a poor condensation heat exchange effect, and there is scaling on the surface of the condenser 100 and its heat exchange tube assembly.

[0145] In some embodiments, the presence of scaling on the surface of the condenser 100 and its heat exchanger tube assembly can be reflected by detecting the temperature change of the spray cooling water before and after heat exchange with the heat exchanger tube assembly. For example, a second temperature sensor 850 can be installed at the spray water supply pipe 800 to detect the temperature of the spray cooling water supplied to the spray assembly, and a third temperature sensor can be installed at the water receiving pan to detect the temperature of the spray cooling water after heat exchange with the heat exchanger tube assembly. The temperature difference between the cooling water before and after heat exchange with the heat exchanger tube assembly is calculated, which is the difference between the temperatures detected by the second temperature sensor 850 and the third temperature sensor. When this difference is less than the standard deviation, it indicates that the heat exchange between the cooling water and the refrigerant through the heat exchanger tube assembly is insufficient, and scaling exists on the surface of the condenser 100 and its heat exchanger tube assembly.

[0146] Considering that the heat exchange efficiency between the refrigerant and cooling water through the heat exchange tube assembly is not only related to the presence of scaling on the heat exchange tube assembly, but also to the ambient temperature, cooling water flow rate, cooling water temperature, and the rotational speed of the fan assembly 200. For example... Figure 17 As shown, when t > t is detected mIf the difference between the detected temperatures of the second temperature sensor 850 and the third temperature sensor is less than the standard deviation, the ambient temperature is also detected before the control solenoid valve 840 and the variable frequency water pump 810 execute the descaling mode. If the ambient temperature is too high and the heat exchange effect of the refrigerant at the heat exchange tube assembly is not as expected, the scaling fault is eliminated and the descaling mode is not executed. After the ambient temperature returns to the set temperature range, step S101 is repeated. Similarly, before the control solenoid valve 840 and the variable frequency water pump 810 execute the descaling mode, the control module 900 also detects the flow rate of cooling water, the temperature of the cooling water supplied by the spray water supply pipe 800 to the spray assembly, and the speed of the fan assembly 200. However, if any of the three values ​​deviates from the set value, the descaling mode will not be executed. Instead, step S101 will be repeated until the ambient temperature, cooling water flow rate, cooling water temperature, and speed of the fan assembly 200 all return to the normal range and step S101 determines that there is scaling. Only then will the control module 900 control the solenoid valve 840 and the variable frequency water pump 810 to execute the descaling mode / automatic cleaning mode.

[0147] In some embodiments, see Figure 18 Between the steps of detecting the real-time outlet temperature t of the refrigerant at outlet pipe 120 and controlling the variable frequency water pump 810 and solenoid valve 840 to switch to descaling mode, the system also includes steps of detecting the cooling water flow rate, detecting the speed of the fan assembly 200, and detecting the cooling water temperature. When the cooling water flow rate deviates from the set flow rate, the cooling water flow rate can be adjusted and stabilized to the set flow rate by controlling the speed of the variable frequency water pump 810. When the cooling water temperature supplied to the spray assembly deviates from the set temperature, the cooling water can be cooled down to the set temperature. When the speed of the fan assembly 200 deviates from the set speed, the fan speed is adjusted to the set speed.

[0148] Once the cooling water flow rate, the temperature of the cooling water supplied to the spray assembly, and the fan speed do not deviate from the set flow rate, set temperature, and set speed, the system returns to the step of detecting the real-time outlet temperature t of the refrigerant at the outlet pipe 120. This allows for determination of whether scaling has occurred on the heat exchange tube assembly based on the real-time outlet temperature t. Then, based on the determination of scaling, the system executes either the spray cooling mode or the descaling / automatic cleaning mode. The above-mentioned detection of cooling water flow rate, fan assembly 200 speed, and cooling water temperature does not have a specific order.

[0149] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0150] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0151] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A self-cleaning evaporation-condensation system, characterized in that, include: The condenser includes an inlet pipe assembly, an outlet pipe, and a heat exchange pipe assembly connecting the inlet pipe assembly and the outlet pipe; The fan assembly is fixed relative to the condenser and the exhaust port is set corresponding to the heat exchange tube assembly; A spray assembly, disposed opposite to the outer surface of the condenser, is configured to spray cooling water toward the heat exchange tube assembly; A spray water supply pipe connects to the spray assembly and supplies cooling water to the spray assembly; A solenoid valve is connected to the spray water supply pipe and is configured to open and close periodically in descaling mode; A variable frequency water pump is connected to the spray water supply pipe. At a first speed, it delivers cooling water to the spray assembly to spray and cool the heat exchange tube assembly. At a second speed, it delivers cooling water to the spray assembly to perform high-pressure flushing and descaling of the heat exchange tube assembly. The second speed is greater than the first speed. The condenser further includes a gas-distribution and liquid-collecting chamber and a reversing chamber, which are located on opposite sides of the condenser. A heat exchange tube assembly connects the gas-distribution and liquid-collecting chamber and the reversing chamber. An inlet pipe assembly and a liquid outlet pipe are both connected to the gas-distribution and liquid-collecting chamber. The gas-distribution and liquid-collecting chamber has a gas-distribution zone, a first reversing zone, and a liquid-collecting zone. The inlet pipe assembly communicates with the gas-distribution zone, and the liquid outlet pipe communicates with the liquid-collecting zone. The reversing chamber has a second reversing zone and a third reversing zone. The second reversing zone communicates with the gas-distribution zone and the first reversing zone through the heat exchange tube assembly. The first reversing zone communicates with the third reversing zone through the heat exchange tube assembly, and the third reversing zone communicates with the liquid-collecting zone through the heat exchange tube assembly.

2. The self-cleaning evaporation and condensation system according to claim 1, characterized in that, The spray assembly includes: An upper spray assembly is located above the condenser and between the condenser and the fan assembly; And / or, a front spray assembly is located on a first side of the condenser side; And / or, a rear spray assembly is located on the second side of the condenser side opposite to the first side side.

3. The self-cleaning evaporation and condensation system according to claim 2, characterized in that, The upper spray assembly includes: The main pipeline connects to the spray water supply pipe; A U-shaped branch pipe is connected to the main pipe and its two ends extend to the outside of the first and second sides of the condenser, respectively. The front branch pipe and the rear branch pipe are arranged parallel to each other and are respectively perpendicularly connected to both ends of the U-shaped branch pipe; The upper spray branch pipes are arranged parallel to each other and vertically connected between the front water distribution pipe and the rear water distribution pipe; The first nozzle is connected to the upper spray branch pipe and is positioned toward the heat exchange tube assembly.

4. The self-cleaning evaporation and condensation system according to claim 3, characterized in that, Both the front spray assembly and the rear spray assembly include: The main water distribution pipe is connected to the spray water supply pipe; Side spray branch pipes are arranged parallel to each other and perpendicularly connected to the main water distribution pipe; The second nozzle is connected to the side spray branch pipe and is positioned toward the heat exchange tube assembly.

5. The self-cleaning evaporation and condensation system according to claim 4, characterized in that, The first nozzles of adjacent upper spray branch pipes are staggered; And / or, the second nozzles of adjacent side spray branches are misaligned; And / or, the second nozzles of the side spray branch pipes on the same layer of the front spray assembly and the rear spray assembly are misaligned.

6. The self-cleaning evaporation and condensation system according to claim 4 or 5, characterized in that, The condenser includes: The front side panel is located on its first side. The rear side panel is located on its second side opposite to the first side panel; The gas-liquid collection chamber is located on its third side. The switching chamber is located on its fourth side, which is opposite to the third side.

7. The self-cleaning evaporation and condensation system according to claim 6, characterized in that, Both the first nozzle and the second nozzle include a frustum at the end of the nozzle, with a central spray hole at the center of the frustum and a plurality of radial spray holes along the circumferential direction on the side of the frustum.

8. The self-cleaning evaporation and condensation system according to claim 7, characterized in that, Both the central nozzle and the radial nozzle include a transition section, a guide section, and a diffuser section; The transition section, the guide section, and the diffuser section extend sequentially from the inside of the first nozzle or the second nozzle to the outside. The transition section is gradually narrowed from the inside of the first nozzle or the second nozzle to the outside, the guide section is of equal diameter, and the diffuser section is gradually expanded from the inside of the first nozzle or the second nozzle to the outside.

9. The self-cleaning evaporation and condensation system according to claim 6, characterized in that, The gas-liquid collection chamber includes: A left sealing plate and a left side plate are interlocked to form a first closed chamber; The first horizontal partition and the second horizontal partition are arranged parallel to each other and vertically connected between the left sealing plate and the left side plate, and divide the first closed chamber into the upper gas distribution zone, the middle first reversing zone and the lower liquid collection zone. The air inlet pipe assembly is connected to the left sealing plate and communicates with the air distribution area; the liquid outlet pipe is connected to the left sealing plate and communicates with the liquid collection area. The switching chamber includes: The right sealing plate and the right side plate are interlocked to form a second closed chamber; A third horizontal partition is vertically connected between the right sealing plate and the right side plate, and divides the second enclosed chamber into the upper second reversing area and the lower third reversing area; The heat exchange tube assembly is connected between the left side plate and the right side plate.

10. The self-cleaning evaporation and condensation system according to claim 1, characterized in that, The heat exchange tube assembly includes several parallel and arrayed irregularly shaped heat exchange tubes; the lower part of the irregularly shaped heat exchange tubes away from the fan assembly is arc-shaped, and the width of the upper part of the irregularly shaped heat exchange tubes near the fan assembly gradually increases from the direction of approaching the fan assembly to away from the fan assembly.

11. The self-cleaning evaporation and condensation system according to claim 10, characterized in that, The inner wall of the irregular heat exchange tube is provided with spiral grooves; and / or, the irregular heat exchange tube has a preset elastic deformation capability.

12. The self-cleaning evaporation and condensation system according to claim 1, characterized in that, The self-cleaning evaporative condensation system meets at least one of the following requirements: The spray water supply pipe is equipped with a flow detection device; The spray water supply pipe is equipped with an unloading valve between the solenoid valve and the variable frequency water pump; The liquid outlet pipe is equipped with a first temperature sensor; A water collection tray is provided below the condenser; The spray water supply pipe is equipped with a second temperature sensor, and the water receiving tray is equipped with a third temperature sensor. The spray water supply pipe is equipped with a filter device; It also includes a control module, which is electrically connected to the first temperature sensor, the second temperature sensor, the third temperature sensor, the flow detection device, the unloading valve, the solenoid valve and the variable frequency water pump.

13. An air conditioning system, characterized in that, The self-cleaning evaporative condensation system according to any one of claims 1-12 is applied.

14. A control method for a self-cleaning evaporative condensation system, used in the self-cleaning evaporative condensation system according to any one of claims 1-12, characterized in that, include: Detect and determine whether the condenser is in a scaling state; If so, the variable frequency water pump is controlled to switch to the second speed, and the solenoid valve is adjusted to open and close periodically, so as to realize the high-pressure vibration descaling of the heat exchange tube assembly by the spray assembly. If not, the variable frequency water pump is kept running at the first speed, and the solenoid valve is adjusted to be normally open so that the spray assembly sprays water onto the heat exchange tube assembly for cooling.

15. The self-cleaning evaporation-condensation system control method according to claim 14, characterized in that, The step of detecting and determining whether the condenser is in a scaling state includes: The real-time outlet temperature t of the refrigerant at the outlet pipe is detected; The real-time outlet temperature t is compared with the standard outlet temperature t. m In comparison, if t > t m If +Δt, then the condenser is determined to be in a scaling state; Where Δt is the allowable temperature deviation.

16. The self-cleaning evaporation-condensation system control method according to claim 15, characterized in that, Between the step of detecting the real-time outlet temperature t of the refrigerant at the outlet pipe and the step of controlling the variable frequency water pump to switch to the second speed operation, the following is also included: The flow rate of the cooling water is detected. If the flow rate deviates from the set flow rate, the flow rate of the cooling water is adjusted to the set flow rate, and the process returns to the step of detecting the real-time outlet temperature t of the refrigerant at the outlet pipe. The temperature of the cooling water supplied to the spray assembly is detected. If the temperature of the cooling water deviates from the set temperature, the temperature of the cooling water is adjusted to the set temperature, and the process returns to the step of detecting the real-time outlet temperature t of the refrigerant at the outlet pipe. The rotational speed of the fan assembly is detected. If the rotational speed of the fan assembly deviates from the set rotational speed, the fan assembly is adjusted to the set rotational speed, and the process returns to the step of detecting the real-time outlet temperature t of the refrigerant at the outlet pipe. When the flow rate of cooling water, the temperature of cooling water supplied to the spray assembly, and the rotation speed of the fan assembly all do not deviate from the set values, the process of controlling the variable frequency water pump to switch to the second speed and adjusting the periodic opening and closing of the solenoid valve is initiated to achieve the step of high-pressure vibration descaling of the heat exchange tube assembly by the spray assembly.

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