Three-stage cooling composite condenser system and control method thereof

Abstract

The invention discloses a three-stage cooling composite condenser system and a control method thereof, and belongs to the technical field of refrigerating systems. The system comprises a modular condensation unit, a refrigerant passage unit, an air circulation passage unit, a water circulation passage unit and a control unit. The modular condensation unit comprises a water cooling module, an air cooling module and an evaporative cooling module; a refrigerant valve and a refrigerant pipeline of the refrigerant passage unit can regulate and control the flow direction of a refrigerant among the water cooling module, the air cooling module and the evaporative cooling module; an air supply valve and an air supply pipeline of the air circulation path unit can regulate and control a circulation path of cooling air between the air cooling module and the evaporative cooling module; a water delivery valve and a water delivery pipeline of the water circulation path unit can regulate and control a circulation path of cooling water between the water cooling module and the evaporative cooling module; the control unit can dynamically adjust the opening and closing combination of the valves based on environmental parameters. According to the three-stage cooling composite condenser system and the control method thereof, the comprehensive performance and applicability of the condenser system are effectively improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of refrigeration systems, and in particular relates to a three-stage cooling compound condenser system and a control method thereof. Background Art

[0002] In commercial building air-conditioning systems, the condenser is the core heat exchange device, and its energy efficiency directly affects the overall performance of the system. Existing air-cooled, water-cooled, and evaporative condensers have significant limitations: air-cooled condensers are constrained by ambient temperature, with energy efficiency plummeting and noise levels rising at high temperatures; water-cooled condensers rely on a continuous water supply, resulting in high water consumption and the risk of pipe freezing; and evaporative condensers experience a sharp drop in efficiency in high-humidity environments and high maintenance costs. Although dual-cooled composite condensers partially alleviate the problem of environmental adaptability, they are still superimposed in fixed modes and cannot dynamically respond to complex climates, resulting in prominent energy efficiency bottlenecks and operational flexibility issues. Therefore, a multi-mode composite design and intelligent control strategy are urgently needed to achieve the coordinated optimization of energy efficiency, water conservation, and reliability. Summary of the Invention

[0003] In view of the deficiencies in the related art, the object of the present invention is to provide a three-stage cooling compound condenser system and a control method thereof to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A three-stage cooling compound condenser system, comprising:

[0006] Modular condensing unit, which includes water cooling module, air cooling module and evaporative cooling module;

[0007] A refrigerant passage unit, which includes a plurality of refrigerant valves and refrigerant pipes to regulate the flow of refrigerant between the water cooling module, the air cooling module and the evaporative cooling module;

[0008] An air circulation passage unit, which includes a plurality of air supply valves and air supply ducts to regulate the flow path of cooling air between the air cooling module and the evaporative cooling module;

[0009] A water circulation path unit, which includes a plurality of water delivery valves and water delivery pipes to regulate the flow path of cooling water between the water cooling module and the evaporative cooling module;

[0010] A control unit is configured to dynamically adjust the opening and closing combinations of multiple refrigerant valves, air supply valves and water delivery valves based on environmental parameters.

[0011] In some embodiments, the water cooling module includes a first box body, a first refrigerant coil and a cooling water container arranged in the first box body; the inlet of the first refrigerant coil is connected to the compressor, and the outlet of the first refrigerant coil is selectively connected to the throttling device or the air cooling module or the evaporative cooling module through the refrigerant passage unit; the water inlet of the cooling water container is selectively connected to the external water source or the evaporative cooling module through the water circulation passage unit, and the water outlet of the cooling water container is connected to the external water source.

[0012] In some embodiments, the air cooling module includes a fan, a second box and a second refrigerant coil arranged in the second box; the air inlet of the second box is connected to the fan, and the air outlet of the second box is selectively connected to the external environment or the evaporative cooling module through an air circulation passage unit; the inlet of the second refrigerant coil is connected to the outlet of the first refrigerant coil through the refrigerant passage unit, and the outlet of the second refrigerant coil is selectively connected to the throttling device or the evaporative cooling module through the refrigerant passage unit.

[0013] In some embodiments, the evaporative cooling module includes a water pump, a third box body and a water storage tank, a third refrigerant coil and a spray device arranged in the third box body; the air inlet of the third box body is selectively connected to the fan or the air outlet of the second box body through the air circulation passage unit, and the air outlet of the third box body is connected to the external environment; the inlet of the third refrigerant coil is selectively connected to the outlet of the first refrigerant coil or the outlet of the second refrigerant coil through the refrigerant passage unit, and the outlet of the third refrigerant coil is connected to the throttling device; the water inlet of the water pump is connected to an external water source, and the water outlet of the water pump is selectively connected to the water inlet of the spray device or the water inlet of the cooling water container through the water circulation passage unit; the water storage tank is used to collect unevaporated water droplets sprayed by the spray device, and the water outlet of the water storage tank is connected to the water inlet of the cooling water container through the water circulation passage unit.

[0014] In some embodiments, the refrigerant valve includes a first valve, a second valve, a third valve, a fourth valve and a fifth valve; the first valve is arranged on the refrigerant pipe connecting the outlet of the first refrigerant coil and the throttling device; the second valve is arranged on the refrigerant pipe connecting the inlet of the second refrigerant coil and the outlet of the first refrigerant coil; the third valve is arranged on the refrigerant pipe connecting the outlet of the second refrigerant coil and the throttling device; the fourth valve is arranged on the refrigerant pipe connecting the inlet of the third refrigerant coil and the outlet of the first refrigerant coil; and the fifth valve is arranged on the refrigerant pipe connecting the inlet of the third refrigerant coil and the outlet of the second refrigerant coil.

[0015] In some embodiments, the air supply valve includes a sixth valve, a seventh valve and an eighth valve; the sixth valve is arranged on the air supply duct connecting the air outlet of the second box body and the external environment; the seventh valve is arranged on the air supply duct connecting the air inlet of the third box body and the fan; the eighth valve is arranged on the air supply duct connecting the air inlet of the third box body and the air outlet of the second box body.

[0016] In some embodiments, the water supply valve includes a ninth valve, a tenth valve and an eleventh valve; the ninth valve is arranged on the water supply pipe connecting the water outlet of the water pump and the water inlet of the cooling water container; the tenth valve is arranged on the water supply pipe connecting the water outlet of the water pump and the water inlet of the spraying device; the eleventh valve is arranged on the water supply pipe connecting the water outlet of the water storage tank and the water inlet of the cooling water container.

[0017] A control method for a three-stage cooling compound condenser system adopts the above-mentioned three-stage cooling compound condenser system, and the control method comprises the following steps:

[0018] Presetting a first temperature threshold and a second temperature threshold in the control unit;

[0019] Working condition determination step: obtaining the ambient temperature and relative humidity in real time; when the ambient temperature is not greater than a first temperature threshold, determining that the working condition is low; when the ambient temperature is greater than the first temperature threshold and less than a second temperature threshold, determining that the working condition is medium; when the ambient temperature is not less than the second temperature threshold, determining that the working condition is high;

[0020] Mode switching steps: Under low temperature conditions, switch between water-cooled evaporation mode, water-cooled mode, and water-cooled air-cooled mode according to the relative humidity; under medium temperature conditions, switch between water-cooled evaporation mode, air-cooled evaporation mode, water-cooled air-cooled mode, and water-cooled mode according to the relative humidity; under high temperature conditions, switch between water-cooled air-cooled evaporation mode and water-cooled air-cooled mode according to the relative humidity;

[0021] Collaborative control steps: According to the constraints corresponding to each mode, the opening and closing of each valve, the fan speed and the water pump flow are regulated to coordinate the operation of the modular condensing unit, the refrigerant path unit, the air circulation path unit and the water circulation path unit.

[0022] In some embodiments, the mode switching step includes:

[0023] Presetting a temperature difference threshold, a first humidity threshold, a second humidity threshold, a third humidity threshold, a fourth humidity threshold, a fifth humidity threshold, a sixth humidity threshold, and a seventh humidity threshold in the control unit;

[0024] Low temperature working mode switching steps: when the relative humidity is not greater than the first humidity threshold, switch to the water-cooled evaporative mode and add antifreeze to the water storage tank; when the relative humidity is greater than the first humidity threshold and not greater than the second humidity threshold, switch to the water-cooled mode and turn off the air cooling module and the evaporative cooling module; when the relative humidity is greater than the second humidity threshold, switch to the water-cooled air cooling mode and prohibit the introduction of hot air into the evaporative cooling module;

[0025] Medium temperature working mode switching steps: when the relative humidity is not greater than the third humidity threshold, switch to the water-cooled evaporative mode, and adjust the fan speed according to the relative humidity to introduce the set air volume; when the relative humidity is greater than the third humidity threshold and not greater than the fourth humidity threshold, switch to the air-cooled evaporative mode, and set the sprinkler power and the fan power to be in an inverse linkage relationship; when the relative humidity is greater than the fourth humidity threshold and not greater than the fifth humidity threshold, switch to the water-cooled air-cooled mode, and only briefly enable the evaporative cooling module when the temperature difference is less than the preset temperature difference threshold; when the relative humidity is greater than the fifth humidity threshold, switch to the water-cooled mode, and adjust the fan speed of the air-cooled module to avoid condensation water accumulation;

[0026] Steps for switching to high-temperature working mode: when the relative humidity is not greater than the sixth humidity threshold, switch to the water-cooled air-cooled evaporation mode and introduce hot air into the evaporative cooling module; when the relative humidity is greater than the sixth humidity threshold and not greater than the seventh humidity threshold, switch to the water-cooled air-cooled evaporation mode, and use the air cooling module as the main cooling method and the evaporative cooling module as the auxiliary cooling method; when the relative humidity is greater than the seventh humidity threshold, switch to the water-cooled air-cooled mode and turn off the evaporative cooling module.

[0027] In some embodiments, the collaborative control step includes:

[0028] In the water cooling mode, the first valve and the ninth valve are opened, and the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve, the tenth valve, and the eleventh valve are closed;

[0029] In the water-cooling and air-cooling modes, the second valve, the third valve, the sixth valve, and the ninth valve are opened, and the first valve, the fourth valve, the fifth valve, the seventh valve, the eighth valve, the tenth valve, and the eleventh valve are closed;

[0030] In the water-cooled evaporation mode, the fourth valve, the seventh valve, the ninth valve, the tenth valve, and the eleventh valve are opened, and the first valve, the second valve, the third valve, the fifth valve, the sixth valve, and the eighth valve are closed;

[0031] In the air-cooled evaporation mode, the second valve, the fourth valve, the fifth valve, the eighth valve, the tenth valve, and the eleventh valve are opened, and the first valve, the third valve, the sixth valve, the seventh valve, and the ninth valve are closed;

[0032] In the water-cooled and air-cooled evaporation mode, the second valve, the fifth valve, the eighth valve, the ninth valve, the tenth valve, and the eleventh valve are opened, and the first valve, the third valve, the fourth valve, the sixth valve, and the seventh valve are closed.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. The three-stage cooling composite condenser system provided by the present invention realizes a dynamic series-parallel combination of three condensation modes through a modular split design, which can flexibly adapt to different temperature and humidity working conditions, breaking through the environmental adaptability limitations of a single condensation mode. The waste heat recovery and low-temperature return water design form an energy closed loop, improve energy utilization, and reduce water resource consumption. The modular architecture supports independent maintenance and replacement, reduces operation and maintenance costs, and is adaptable to different scale scenarios.

[0035] 2. The control method of the three-stage cooling compound condenser system provided by the present invention is based on multi-parameter fusion decision-making, dynamically divides the operating condition intervals and refines the selection mode. By real-time regulation of valve opening and closing, fan speed and water pump flow, it achieves smooth transition across operating conditions and optimal matching of cooling capacity and energy consumption, effectively improves heat dissipation energy efficiency, ensures stable and reliable operation of the system, and achieves multi-objective optimization of energy saving, water saving and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0037] Figure 1 A schematic diagram of the modular condensing unit structure of an embodiment of a three-stage cooling compound condenser system and a control method thereof according to the present invention;

[0038] Figure 2 A schematic diagram of the refrigerant path unit structure of an embodiment of a three-stage cooling compound condenser system and a control method thereof according to the present invention;

[0039] Figure 3 This is a schematic structural diagram of an air circulation path unit of an embodiment of a three-stage cooling compound condenser system and a control method thereof according to the present invention;

[0040] Figure 4 A schematic structural diagram of a water circulation path unit of an embodiment of a three-stage cooling compound condenser system and a control method thereof according to the present invention;

[0041] Figure 5 This is a schematic diagram of the water cooling module structure of an embodiment of the three-stage cooling compound condenser system and the control method thereof of the present invention;

[0042] Figure 6This is a schematic diagram of the air cooling module structure of an embodiment of the three-stage cooling compound condenser system and the control method thereof of the present invention;

[0043] Figure 7 This is a schematic structural diagram of an evaporative cooling module of an embodiment of a three-stage cooling compound condenser system and a control method thereof according to the present invention;

[0044] Figure 8 A control logic diagram of an embodiment of a three-stage cooling compound condenser system and a control method thereof according to the present invention;

[0045] Figure 9 This is a control logic diagram of a three-stage cooling compound condenser system and a control method thereof in a low temperature working mode according to an embodiment of the present invention;

[0046] Figure 10 This is a control logic diagram of a three-stage cooling compound condenser system and a control method thereof under a medium temperature working mode according to an embodiment of the present invention;

[0047] Figure 11 This is a control logic diagram of a three-stage cooling compound condenser system and a control method thereof in a high temperature working mode according to an embodiment of the present invention.

[0048] In the picture:

[0049] 1. Modular condensing unit; 11. Water cooling module; 111. First housing; 112. First refrigerant coil; 12. Air cooling module; 121. Fan; 122. Second housing; 123. Second refrigerant coil; 13. Evaporative cooling module; 131. Water pump; 132. Third housing; 133. Water storage tank; 134. Third refrigerant coil; 135. Spraying device; 136. Filling heat exchange layer; 2. Refrigerant passage unit; 21. Refrigerant valve; 2 11. First valve; 212. Second valve; 213. Third valve; 214. Fourth valve; 215. Fifth valve; 22. Refrigerant pipeline; 3. Air circulation pathway unit; 31. Air supply valve; 311. Sixth valve; 312. Seventh valve; 313. Eighth valve; 32. Air supply pipeline; 4. Water circulation pathway unit; 41. Water supply valve; 411. Ninth valve; 412. Tenth valve; 413. Eleventh valve; 42. Water supply pipeline. DETAILED DESCRIPTION

[0050] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0051] In the description of the present invention, it should be understood that the terms "center", "transverse", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0052] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0053] Example 1:

[0054] See attached Figures 1 to 11 , gives a schematic embodiment of the three-stage cooling compound condenser system proposed in the present invention, which includes a modular condensing unit 1, a refrigerant path unit 2, an air circulation path unit 3, a water circulation path unit 4 and a control unit.

[0055] See attached Figure 1 , the modular condensing unit 1 includes a water cooling module 11, an air cooling module 12 and an evaporative cooling module 13. The refrigerant passage unit 2 includes a plurality of refrigerant valves 21 and refrigerant pipes 22 to regulate the flow direction of the refrigerant between the water cooling module 11, the air cooling module 12 and the evaporative cooling module 13. The air circulation passage unit 3 includes a plurality of air supply valves 31 and air supply pipes 32 to regulate the flow path of the cooling air between the air cooling module 12 and the evaporative cooling module 13. The water circulation passage unit 4 includes a plurality of water supply valves 41 and water supply pipes 42 to regulate the flow path of the cooling water between the water cooling module 11 and the evaporative cooling module 13. The control unit is configured to dynamically adjust the opening and closing combination of the plurality of refrigerant valves 21, the air supply valves 31 and the water supply valves 41 based on environmental parameters. See the attached Figure 1 , the solid line is the refrigerant pipe 22 , the dotted line is the air supply pipe 32 , and the dotted line is the water supply pipe 42 .

[0056] See attached Figure 5The water cooling module 11 includes a first housing 111, a first refrigerant coil 112 disposed within the first housing 111, and a cooling water container. The inlet of the first refrigerant coil 112 is connected to the compressor, and the outlet of the first refrigerant coil 112 is selectively connected to a throttling device, the air cooling module 12, or the evaporative cooling module 13 via the refrigerant path unit 2. The water inlet of the cooling water container is selectively connected to an external water source or the evaporative cooling module 13 via the water circulation path unit 4, and the water outlet of the cooling water container is connected to an external water source.

[0057] In this embodiment, the first refrigerant coil 112 is a coil-type heat exchanger. The coil-type heat exchanger is installed in a cooling water container, either immersed or surrounded by a tube wall, forming a partition with the cooling water. The high-temperature refrigerant in the coil releases heat to the cooling water through the tube wall. The cooling water absorbs the heat, rising in temperature and then being discharged to an external water source through the water circulation path unit 4.

[0058] See attached Figure 6 The air cooling module 12 includes a fan 121, a second housing 122, and a second refrigerant coil 123 disposed within the second housing 122. The air inlet of the second housing 122 is connected to the fan 121, and the air outlet of the second housing 122 is selectively connected to the external environment or the evaporative cooling module 13 via the air circulation path unit 3. The inlet of the second refrigerant coil 123 is connected to the outlet of the first refrigerant coil 112 via the refrigerant path unit 2, and the outlet of the second refrigerant coil 123 is selectively connected to the throttling device or the evaporative cooling module 13 via the refrigerant path unit 2.

[0059] In this embodiment, fan 121 is an axial flow fan, characterized by high flow, low pressure, and a compact structure. Second refrigerant coil 123 is a finned heat exchanger or coil-and-tube heat exchanger. During operation, fan 121 drives airflow axially through second refrigerant coil 123 within second housing 122. The outer surface of the coil (the fins or coil structure) comes into direct contact with the airflow, and heat is exchanged between the air and the refrigerant within the coil through interlayer heat exchange. The fin structure increases the heat exchange area, thereby improving efficiency.

[0060] See attached Figure 7The evaporative cooling module 13 includes a water pump 131, a third housing 132, a water storage tank 133, a third refrigerant coil 134, and a spray device 135. The air inlet of the third housing 132 is selectively connected to the air outlet of the fan 121 or the second housing 122 through the air circulation passage unit 3, and the air outlet of the third housing 132 is connected to the external environment. The inlet of the third refrigerant coil 134 is selectively connected to the outlet of the first refrigerant coil 112 or the outlet of the second refrigerant coil 123 through the refrigerant passage unit 2, and the outlet of the third refrigerant coil 134 is connected to the throttling device. The water inlet of the water pump 131 is connected to an external water source, and the water outlet of the water pump 131 is selectively connected to the water inlet of the spray device 135 or the water inlet of the cooling water container through the water circulation passage unit 4. The water storage tank 133 is used to collect unevaporated water droplets sprayed by the spraying device 135. The water outlet of the water storage tank 133 is connected to the water inlet of the cooling water container through the water circulation passage unit 4.

[0061] In this embodiment, the third refrigerant coil 134 is a coil-type heat exchanger. The refrigerant within the third refrigerant coil 134 exchanges heat with the spray water and air outside the coil through the tube wall, transferring heat to the water and air. The spray device 135 sprays water into a mist. As air passes through, it comes into contact with the water. Some of the water evaporates, absorbing heat and lowering the air temperature, enhancing the heat exchange efficiency outside the coil. Unevaporated water falls into the water storage tank 133 and is recirculated through the water circulation path unit 4 or flows to the cooling water container. The heated air is discharged to the external environment through the outlet of the third tank 132, ultimately releasing the system's heat.

[0062] In this embodiment, the evaporative cooling module 13 also includes a packing heat exchange layer 136, which is located within the third housing 132, at the air outlet of the third housing 132 and above the spray device 135. The packing heat exchange layer 136 receives the atomized water sprayed by the spray device 135, forming a water film or water droplets that adhere to the packing surface. As air flows through the packing heat exchange layer 136, it comes into contact with the water, absorbing heat through evaporation and lowering the air temperature, further enhancing the heat exchange efficiency outside the third refrigerant coil 134. The cooled air, carrying water vapor, is discharged through the air outlet. Unevaporated water flows through the packing heat exchange layer 136 and falls into the water storage tank 133, participating in the water recycling process.

[0063] See attached Figure 2The refrigerant valve 21 includes a first valve 211, a second valve 212, a third valve 213, a fourth valve 214, and a fifth valve 215. The first valve 211 is located on the refrigerant pipe 22 connecting the outlet of the first refrigerant coil 112 to the throttling device. The second valve 212 is located on the refrigerant pipe 22 connecting the inlet of the second refrigerant coil 123 to the outlet of the first refrigerant coil 112. The third valve 213 is located on the refrigerant pipe 22 connecting the outlet of the second refrigerant coil 123 to the throttling device. The fourth valve 214 is located on the refrigerant pipe 22 connecting the inlet of the third refrigerant coil 134 to the outlet of the first refrigerant coil 112. The fifth valve 215 is located on the refrigerant pipe 22 connecting the inlet of the third refrigerant coil 134 to the outlet of the second refrigerant coil 123.

[0064] See attached Figure 3 The air supply valve 31 includes a sixth valve 311, a seventh valve 312, and an eighth valve 313. The sixth valve 311 is located on the air supply duct 32 connecting the air outlet of the second housing 122 to the external environment. The seventh valve 312 is located on the air supply duct 32 connecting the air inlet of the third housing 132 to the fan 121. The eighth valve 313 is located on the air supply duct 32 connecting the air inlet of the third housing 132 to the air outlet of the second housing 122.

[0065] See attached Figure 4 The water supply valve 41 includes a ninth valve 411, a tenth valve 412, and an eleventh valve 413. The ninth valve 411 is located on the water supply pipe 42 connecting the water outlet of the water pump 131 and the water inlet of the cooling water container. The tenth valve 412 is located on the water supply pipe 42 connecting the water outlet of the water pump 131 and the water inlet of the spray device 135. The eleventh valve 413 is located on the water supply pipe 42 connecting the water outlet of the water storage tank 133 and the water inlet of the cooling water container.

[0066] In this embodiment, the refrigerant valve 21, air supply valve 31, and water supply valve 41 are all electrically controlled valves, each electrically connected to a control unit. A dynamic series-parallel combination of the three modules is achieved through the opening and closing of multiple electrically controlled valves. For example, in the water-cooled / air-cooled evaporative mode, the water-cooling module 11, air-cooling module 12, and evaporative cooling module 13 are connected in series to achieve enhanced, step-by-step heat dissipation. Dual cooling modes, such as the water-cooled / air-cooled and water-cooled evaporative modes, as well as independent module operation modes, such as the water-cooled mode, can adapt to varying temperature and humidity conditions. This system enables coordinated resource utilization. Regarding water circulation, low-temperature water from the water storage tank 133 is pumped into the cooling water container of the water-cooled module 11 via a booster pump, reducing the need for external water supply. Regarding air circulation, when hot air from the air-cooled module 12's outlet is selectively connected to the evaporative cooling module 13 via the air circulation pathway unit 3, the air supply duct 32 directs the hot air into the air inlet of the evaporative cooling module 13, improving the evaporation efficiency of the evaporative zone of the evaporative cooling module 13 and recovering waste heat. In addition, the water cooling module 11, the air cooling module 12 and the evaporative cooling module 13 are designed to be independent and separate. When one of the modules is repaired, it will not affect the normal operation of other modules.

[0067] In this embodiment, the three-stage cooling compound condenser system also includes a multi-parameter sensor group, which includes at least a temperature and humidity sensor, a water quality probe, and a temperature difference sensor arranged at the inlet and outlet of the water cooling module 11, and is used to collect the ambient temperature, relative humidity, water quality parameters and the inlet and outlet temperature difference of the water cooling module 11 in real time, dynamically divide the low temperature working condition, medium temperature working condition and high temperature working condition intervals, and further combine the humidity threshold and cooling capacity demand to perform refined mode selection.

[0068] In the above-mentioned schematic embodiment, the three-stage cooling composite condenser system is designed through independent splitting of the air-cooling module, the water-cooling module and the evaporative cooling module, which work in dynamic combination on demand, breaking through the boundary of environmental adaptability. Through the waste heat recovery coupling design, the hot air from the air-cooling module is guided to the evaporation area of the evaporative cooling module to accelerate evaporation, while the cold water of the evaporative cooling module is returned to the water-cooling module to reduce water consumption. In addition, the modular design can be replaced and maintained independently on demand, reducing operation and maintenance costs. Through structural innovation and energy flow reconstruction, the energy efficiency bottleneck and resource constraints of the composite condenser are systematically solved, providing an intensive and low-noise heat dissipation solution for commercial buildings with large temperature differences between day and night and frequent alternation of dry and wet.

[0069] Example 2:

[0070] See attached Figures 1 to 11 This embodiment provides a control method for a three-stage cooling compound condenser system, which adopts the three-stage cooling compound condenser system of Example 1. The control method for the three-stage cooling compound condenser system includes a working condition judgment step, a mode switching step and a coordinated control step.

[0071] First, a first temperature threshold and a second temperature threshold are preset in the control unit.

[0072] Working condition judgment step: obtain the ambient temperature and relative humidity in real time. When the ambient temperature is not greater than the first temperature threshold, it is judged to be a low-temperature working condition. When the ambient temperature is greater than the first temperature threshold and less than the second temperature threshold, it is judged to be a medium-temperature working condition. When the ambient temperature is not less than the second temperature threshold, it is judged to be a high-temperature working condition.

[0073] Mode switching steps: Under low temperature conditions, switch between water-cooled evaporation mode, water-cooled mode, and water-cooled air-cooled mode according to the relative humidity; under medium temperature conditions, switch between water-cooled evaporation mode, air-cooled evaporation mode, water-cooled air-cooled mode, and water-cooled mode according to the relative humidity; under high temperature conditions, switch between water-cooled air-cooled evaporation mode and water-cooled air-cooled mode according to the relative humidity.

[0074] Collaborative control steps: According to the constraints corresponding to each mode, the opening and closing of each valve, the speed of the fan 121 and the flow of the water pump 131 are regulated to coordinate the operation of the modular condensing unit 1, the refrigerant path unit 2, the air circulation path unit 3 and the water circulation path unit 4.

[0075] The mode switching step includes a low temperature working condition mode switching step, a medium temperature working condition mode switching step and a high temperature working condition mode switching step.

[0076] First, a temperature difference threshold, a first humidity threshold, a second humidity threshold, a third humidity threshold, a fourth humidity threshold, a fifth humidity threshold, a sixth humidity threshold and a seventh humidity threshold are preset in the control unit, wherein the temperature difference threshold is set for the inlet and outlet temperature difference of the water cooling module 11.

[0077] See attached Figure 9 Low-temperature operating mode switching steps: When the relative humidity is no greater than a first humidity threshold, the system switches to water-cooled evaporative mode and adds antifreeze to water tank 133. The antifreeze concentration in water tank 133 must be no less than 20%. When the relative humidity is greater than the first humidity threshold but no greater than a second humidity threshold, the system switches to water-cooled mode, shutting down air cooling module 12 and evaporative cooling module 13. When the relative humidity is greater than the second humidity threshold, the system switches to water-cooled air cooling mode. At this point, hot air is exhausted and the introduction of hot air into evaporative cooling module 13 is prohibited.

[0078] See attached Figure 10, medium temperature working mode switching steps: when the relative humidity is not greater than the third humidity threshold, switch to the water-cooled evaporation mode, and adjust the speed of the fan 121 according to the relative humidity to introduce the set air volume to the evaporative cooling module 13; when the relative humidity is greater than the third humidity threshold and not greater than the fourth humidity threshold, switch to the air-cooled evaporation mode, and set the power of the spray device 135 and the power of the fan 121 to be in an inverse linkage relationship; when the relative humidity is greater than the fourth humidity threshold and not greater than the fifth humidity threshold, switch to the water-cooled air-cooling mode, and only briefly enable the evaporative cooling module 13 when the inlet and outlet temperature difference of the water cooling module 11 is less than the preset temperature difference threshold; when the relative humidity is greater than the fifth humidity threshold, switch to the water cooling mode, and adjust the speed of the fan 121 of the air cooling module 12 to avoid accumulation of condensed water.

[0079] See attached Figure 11 , high temperature working condition mode switching steps: when the relative humidity is not greater than the sixth humidity threshold, switch to the water-cooled air-cooled evaporation mode, and introduce the hot air into the evaporative cooling module 13; when the relative humidity is greater than the sixth humidity threshold and not greater than the seventh humidity threshold, switch to the water-cooled air-cooled evaporation mode, and the air cooling module 12 is used as the main cooling method and the evaporative cooling module 13 is used as the auxiliary cooling method. At this time, if the relative humidity conditions permit, part of the hot air can be introduced into the evaporative cooling module 13; when the relative humidity is greater than the seventh humidity threshold, switch to the water-cooled air-cooled mode, turn off the evaporative cooling module 13, and trigger water cooling compensation.

[0080] The collaborative control steps include:

[0081] In water cooling mode, the first valve 211 and the ninth valve 411 are opened, and the second valve 212, the third valve 213, the fourth valve 214, the fifth valve 215, the sixth valve 311, the seventh valve 312, the eighth valve 313, the tenth valve 412 and the eleventh valve 413 are closed. In this mode, pure water cooling is used for heat dissipation, which is suitable for constant temperature and humidity or extreme water quality conditions.

[0082] In water-cooled / air-cooled mode, the second valve 212, third valve 213, sixth valve 311, and ninth valve 411 are opened, while the first valve 211, fourth valve 214, fifth valve 215, seventh valve 312, eighth valve 313, tenth valve 412, and eleventh valve 413 are closed. In this mode, the evaporative cooling module 13 is shut down to prevent efficiency degradation in high humidity environments, while air cooling is used to assist in heat dissipation. Cooling water flows from an external water source through the water pump 131, ninth valve 411, and water supply pipe 42 to the cooling water container for cooling, before returning to the external water source, achieving independent circulation. The air-cooled module 12 exhausts hot air to the external environment through the sixth valve 311 and air supply pipe 32. Furthermore, in water-cooled / air-cooled mode, the first valve 211 can be opened to achieve parallel operation of the water-cooled module 11 and air-cooled module 12. In this case, the refrigerant flow rate of the second refrigerant coil 123 can be controlled by controlling the opening of the third valve 213 to balance the heat dissipation load with the heat dissipation pressure of the water-cooled module 11.

[0083] In the water-cooled evaporative mode, the fourth valve 214, seventh valve 312, ninth valve 411, tenth valve 412, and eleventh valve 413 are opened, while the first valve 211, second valve 212, third valve 213, fifth valve 215, sixth valve 311, and eighth valve 313 are closed. In this mode, the water-cooled module 11 and the evaporative cooling module 13 work in tandem, utilizing the antifreeze-resistant low-temperature water pre-stored in the water storage tank 133 to enhance heat exchange. The seventh valve 312 is opened to introduce external cold air through the fan 121 to assist evaporation. Furthermore, in the water-cooled evaporative mode, the first valve 211 can be opened to achieve parallel operation of the water-cooled module 11 and the evaporative cooling module 13. In this case, the refrigerant flow rate of the third refrigerant coil 134 can be controlled by controlling the opening of the fourth valve 214 to balance the heat dissipation load. In this mode, the openings of the ninth valve 411 and the eleventh valve 413 can also be controlled to control the return water ratio to prevent freezing. In the water-cooled evaporation mode, hard constraints on water quality can be introduced at the same time. When the standard is exceeded, the evaporative cooling module 13 is immediately locked and switched to the standby mode. Through the continuous adjustment of the proportional valve, variable frequency fan and hot air guide mechanism, a smooth transition across working conditions and an optimal match between cooling capacity and energy consumption can be achieved, ultimately achieving multi-objective optimization of heat dissipation energy efficiency improvement, resource recycling and equipment reliability.

[0084] In the air-cooled evaporation mode, the second valve 212 , the fourth valve 214 , the fifth valve 215 , the eighth valve 313 , the tenth valve 412 and the eleventh valve 413 are opened, and the first valve 211 , the third valve 213 , the sixth valve 311 , the seventh valve 312 and the ninth valve 411 are closed.

[0085] In the water-cooled and air-cooled evaporation mode, the second valve 212, the fifth valve 215, the eighth valve 313, the ninth valve 411, the tenth valve 412 and the eleventh valve 413 are opened, and the first valve 211, the third valve 213, the fourth valve 214, the sixth valve 311 and the seventh valve 312 are closed; in this mode, the water-cooled module 11, the air-cooled module 12 and the evaporative cooling module 13 are connected in series, and the refrigerant flows through the first refrigerant coil 112, the second refrigerant coil 123 and the third refrigerant coil 134 in sequence, first cooled by cooling water, then cooled by flowing air, and finally cooled by spraying evaporation by the spray device 135. At the same time, the hot air coming out of the air outlet of the air-cooled module 12 is directionally introduced into the evaporation area in the evaporative cooling module 13 to improve the evaporation efficiency and maximize energy efficiency.

[0086] In water-cooled evaporation mode, air-cooled evaporation mode, and water-cooled / air-cooled evaporation mode, low-temperature water in the water storage tank 133 of the evaporative cooling module 13 flows back through the water supply pipe 42 and the eleventh valve 413 to the water inlet of the cooling water container of the water cooling module 11, thereby reducing the need for external water replenishment. Simultaneously, the refrigerant flow rate can be distributed by controlling the opening of the second valve 212 and the fifth valve 215, enhancing heat dissipation for each of the water cooling module 11, air cooling module 12, and evaporative cooling module 13. The opening of the eighth valve 313 can also be controlled to adjust the proportion of hot air entering the evaporative cooling module 13 to match evaporation requirements.

[0087] Based on temperature and humidity sensors, water quality probes and cooling demand feedback, the control unit calculates the optimal valve opening and the power of the water pump and fan in real time. For example, under high-temperature drying conditions, it automatically increases the opening of the eighth valve 313 to maximize the hot air recovery efficiency, while limiting the opening of the eleventh valve 413 to reduce the return water flow and avoid excessively low water temperature.

[0088] The control method of the three-stage cooling compound condenser system also includes a water quality abnormality processing step. When the water cooling mode 11 or the evaporative cooling mode 13 is running, when the water quality probe detects that any of the conductivity, pH or turbidity exceeds the standard, the evaporative cooling module 13 is immediately shut down, switched to the standby mode and an alarm is issued, and automatic sewage discharge is triggered at the same time until the water quality in the water storage tank 133 is restored.

[0089] In the above-mentioned schematic embodiment, the coordinated control strategy of the control method of the three-stage cooling composite condenser system can effectively improve the comprehensive performance and applicability of the condensing system. The split air-cooling module, water-cooling module and evaporative cooling module break through the environmental adaptability limitations of the traditional condenser through a dynamic combination mechanism, and achieve efficient and stable operation in a wide temperature range. The waste heat recovery and low-temperature return water design can form a "hot air-cold water" closed-loop coupling, improve energy utilization, and reduce water resource consumption. In addition, the modular architecture supports independent maintenance and on-demand replacement, reducing operation and maintenance costs, and can be flexibly adapted to air-conditioning systems or industrial scenarios of different sizes by adding and removing modules. In particular, in response to the problems of large fluctuations in energy efficiency, high waste of resources, and high maintenance costs in complex climates, it provides an intensive and low-carbon heat dissipation solution for high-energy-consuming fields such as commercial buildings with large temperature differences between day and night and frequent alternation of dry and wet.

[0090] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0091] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the same. Although the present invention has been described in detail with reference to preferred embodiments, persons skilled in the art should understand that the specific implementation methods of the present invention may still be modified or some technical features may be replaced by equivalents without departing from the spirit of the technical solutions of the present invention, and all of these should fall within the scope of the technical solutions claimed for protection by the present invention.

Claims

1. A three-stage cooling compound condenser system, characterized in that: include: A modular condensing unit comprising a water cooling module, an air cooling module and an evaporative cooling module; A refrigerant passage unit, comprising a plurality of refrigerant valves and refrigerant pipes to regulate the flow of refrigerant between the water cooling module, the air cooling module and the evaporative cooling module; An air circulation passage unit, the air circulation passage unit including a plurality of air supply valves and air supply ducts to regulate the flow path of cooling air between the air cooling module and the evaporative cooling module; A water circulation passage unit, the water circulation passage unit including a plurality of water delivery valves and water delivery pipes to regulate the flow path of cooling water between the water cooling module and the evaporative cooling module; A control unit is configured to dynamically adjust the opening and closing combinations of the plurality of refrigerant valves, air supply valves and water delivery valves based on environmental parameters.

2. The three-stage cooling compound condenser system according to claim 1, characterized in that: The water cooling module includes a first box body, a first refrigerant coil and a cooling water container arranged in the first box body; the inlet of the first refrigerant coil is connected to the compressor, and the outlet of the first refrigerant coil is selectively connected to the throttling device or the air cooling module or the evaporative cooling module through the refrigerant passage unit; the water inlet of the cooling water container is selectively connected to an external water source or the evaporative cooling module through the water circulation passage unit, and the water outlet of the cooling water container is connected to an external water source.

3. The three-stage cooling compound condenser system according to claim 2, characterized in that: The air cooling module includes a fan, a second box and a second refrigerant coil arranged in the second box; the air inlet of the second box is connected to the fan, and the air outlet of the second box is selectively connected to the external environment or the evaporative cooling module through the air circulation passage unit; the inlet of the second refrigerant coil is connected to the outlet of the first refrigerant coil through the refrigerant passage unit, and the outlet of the second refrigerant coil is selectively connected to the throttling device or the evaporative cooling module through the refrigerant passage unit.

4. The three-stage cooling compound condenser system according to claim 3, characterized in that: The evaporative cooling module includes a water pump, a third box body, a water storage tank, a third refrigerant coil and a spray device arranged in the third box body; the air inlet of the third box body is selectively connected to the air outlet of the fan or the second box body through an air circulation passage unit, and the air outlet of the third box body is connected to the external environment; the inlet of the third refrigerant coil is selectively connected to the outlet of the first refrigerant coil or the outlet of the second refrigerant coil through the refrigerant passage unit, and the outlet of the third refrigerant coil is connected to a throttling device; the water inlet of the water pump is connected to an external water source, and the water outlet of the water pump is selectively connected to the water inlet of the spray device or the water inlet of the cooling water container through the water circulation passage unit; the water storage tank is used to collect unevaporated water droplets sprayed by the spray device, and the water outlet of the water storage tank is connected to the water inlet of the cooling water container through the water circulation passage unit.

5. The three-stage cooling compound condenser system according to claim 4, characterized in that: The refrigerant valve includes a first valve, a second valve, a third valve, a fourth valve and a fifth valve; the first valve is arranged on the refrigerant pipe connecting the outlet of the first refrigerant coil and the throttling device; the second valve is arranged on the refrigerant pipe connecting the inlet of the second refrigerant coil and the outlet of the first refrigerant coil; the third valve is arranged on the refrigerant pipe connecting the outlet of the second refrigerant coil and the throttling device; the fourth valve is arranged on the refrigerant pipe connecting the inlet of the third refrigerant coil and the outlet of the first refrigerant coil; the fifth valve is arranged on the refrigerant pipe connecting the inlet of the third refrigerant coil and the outlet of the second refrigerant coil.

6. The three-stage cooling compound condenser system according to claim 5, characterized in that: The air supply valve includes a sixth valve, a seventh valve and an eighth valve; the sixth valve is arranged on the air supply duct connecting the air outlet of the second box body and the external environment; the seventh valve is arranged on the air supply duct connecting the air inlet of the third box body and the fan; the eighth valve is arranged on the air supply duct connecting the air inlet of the third box body and the air outlet of the second box body.

7. The three-stage cooling compound condenser system according to claim 6, characterized in that: The water supply valves include a ninth valve, a tenth valve and an eleventh valve; the ninth valve is arranged on the water supply pipeline connecting the water outlet of the water pump and the water inlet of the cooling water container; the tenth valve is arranged on the water supply pipeline connecting the water outlet of the water pump and the water inlet of the spraying device; the eleventh valve is arranged on the water supply pipeline connecting the water outlet of the water storage tank and the water inlet of the cooling water container.

8. A control method for a three-stage cooling compound condenser system, using the three-stage cooling compound condenser system according to claim 7, characterized in that: The control method comprises the following steps: Presetting a first temperature threshold and a second temperature threshold in the control unit; Working condition determination step: obtaining the ambient temperature and relative humidity in real time; when the ambient temperature is not greater than a first temperature threshold, determining that the working condition is low; when the ambient temperature is greater than the first temperature threshold and less than a second temperature threshold, determining that the working condition is medium; when the ambient temperature is not less than the second temperature threshold, determining that the working condition is high; Mode switching steps: Under low temperature conditions, switch between water-cooled evaporation mode, water-cooled mode, and water-cooled air-cooled mode according to the relative humidity; under medium temperature conditions, switch between water-cooled evaporation mode, air-cooled evaporation mode, water-cooled air-cooled mode, and water-cooled mode according to the relative humidity; under high temperature conditions, switch between water-cooled air-cooled evaporation mode and water-cooled air-cooled mode according to the relative humidity; Collaborative control steps: According to the constraints corresponding to each mode, the opening and closing of each valve, the fan speed and the water pump flow are regulated to coordinate the operation of the modular condensing unit, the refrigerant path unit, the air circulation path unit and the water circulation path unit.

9. The control method of the three-stage cooling compound condenser system according to claim 8, characterized in that: The mode switching step includes: Presetting a temperature difference threshold, a first humidity threshold, a second humidity threshold, a third humidity threshold, a fourth humidity threshold, a fifth humidity threshold, a sixth humidity threshold, and a seventh humidity threshold in the control unit; Low temperature working mode switching steps: when the relative humidity is not greater than the first humidity threshold, switch to the water-cooled evaporative mode and add antifreeze to the water storage tank; when the relative humidity is greater than the first humidity threshold and not greater than the second humidity threshold, switch to the water-cooled mode and turn off the air cooling module and the evaporative cooling module; when the relative humidity is greater than the second humidity threshold, switch to the water-cooled air cooling mode and prohibit the introduction of hot air into the evaporative cooling module; Medium temperature working mode switching steps: when the relative humidity is not greater than the third humidity threshold, switch to the water-cooled evaporative mode, and adjust the fan speed according to the relative humidity to introduce the set air volume; when the relative humidity is greater than the third humidity threshold and not greater than the fourth humidity threshold, switch to the air-cooled evaporative mode, and set the sprinkler power and the fan power to be in an inverse linkage relationship; when the relative humidity is greater than the fourth humidity threshold and not greater than the fifth humidity threshold, switch to the water-cooled air-cooled mode, and only briefly enable the evaporative cooling module when the temperature difference is less than the preset temperature difference threshold; when the relative humidity is greater than the fifth humidity threshold, switch to the water-cooled mode, and adjust the fan speed of the air-cooled module to avoid condensation water accumulation; Steps for switching to high-temperature working mode: when the relative humidity is not greater than the sixth humidity threshold, switch to the water-cooled air-cooled evaporation mode and introduce hot air into the evaporative cooling module; when the relative humidity is greater than the sixth humidity threshold and not greater than the seventh humidity threshold, switch to the water-cooled air-cooled evaporation mode, and use the air cooling module as the main cooling method and the evaporative cooling module as the auxiliary cooling method; when the relative humidity is greater than the seventh humidity threshold, switch to the water-cooled air-cooled mode and turn off the evaporative cooling module.

10. The control method of the three-stage cooling compound condenser system according to claim 8, characterized in that: The collaborative control step includes: In the water cooling mode, the first valve and the ninth valve are opened, and the second valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve, the tenth valve, and the eleventh valve are closed; In the water-cooling and air-cooling modes, the second valve, the third valve, the sixth valve, and the ninth valve are opened, and the first valve, the fourth valve, the fifth valve, the seventh valve, the eighth valve, the tenth valve, and the eleventh valve are closed; In the water-cooled evaporation mode, the fourth valve, the seventh valve, the ninth valve, the tenth valve, and the eleventh valve are opened, and the first valve, the second valve, the third valve, the fifth valve, the sixth valve, and the eighth valve are closed; In the air-cooled evaporation mode, the second valve, the fourth valve, the fifth valve, the eighth valve, the tenth valve, and the eleventh valve are opened, and the first valve, the third valve, the sixth valve, the seventh valve, and the ninth valve are closed; In the water-cooled and air-cooled evaporation mode, the second valve, the fifth valve, the eighth valve, the ninth valve, the tenth valve, and the eleventh valve are opened, and the first valve, the third valve, the fourth valve, the sixth valve, and the seventh valve are closed.

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