Highly integrated compact water chilling unit

Abstract

The invention discloses a highly integrated compact water chilling unit, which relates to the technical field of industrial refrigeration and air conditioning equipment and comprises a refrigerant compressor, a high-pressure controller, a condensation, throttling and evaporation three-in-one plate-fin heat exchanger, a drying filter, a low-pressure controller, a water pump and a temperature control bypass valve. A condenser, a throttling device and an evaporator in a traditional water chilling unit are integrated into a whole, component parts of equipment are greatly reduced, the unit structure is more compact, the occupied area of the equipment is remarkably reduced, and the water chilling unit is suitable for places with limited space; the operation state of the unit is accurately controlled and monitored in real time, it is guaranteed that the unit operates in a safe and stable state, and the stability of the refrigeration effect is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of industrial refrigeration and air conditioning equipment technology, and particularly to a highly integrated compact chiller unit. Background Technology

[0002] In the current field of industrial refrigeration and air conditioning, traditional water chillers are usually composed of multiple independent components such as condensers, throttling devices, and evaporators.

[0003] These components need to be connected by a large number of pipes, which not only makes the overall equipment bulky and occupies a lot of installation space, but also causes some energy loss and reduces refrigeration efficiency during the refrigerant transportation process.

[0004] Meanwhile, the presence of multiple independent components complicates the installation and maintenance process, increasing labor and time costs. Furthermore, the collaborative performance of components in traditional chillers needs improvement, making it difficult to achieve precise temperature control and stable operation, thus failing to adequately meet the needs of some locations with high cooling performance requirements. Therefore, we propose a highly integrated, compact chiller to address these issues. Summary of the Invention

[0005] The purpose of this invention is to provide a highly integrated and compact chiller unit to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a highly integrated compact chiller unit, comprising a refrigerant compressor, a high-pressure controller, and a condenser-throttling-evaporation three-in-one plate-fin heat exchanger. The high-pressure controller is connected to the outlet side of the refrigerant compressor. The condenser-throttling-evaporation three-in-one plate-fin heat exchanger internally integrates a condenser module, a capillary flow unit, and an evaporation unit. The inlet of the condenser module is connected to the high-pressure controller, and the outlet of the evaporation unit is connected to the inlet of the refrigerant compressor. A drying filter is connected between the capillary flow unit of the condenser-throttling-evaporation three-in-one plate-fin heat exchanger and the expansion valve. A low-pressure controller is connected between the evaporation unit of the condenser-throttling-evaporation three-in-one plate-fin heat exchanger and the refrigerant compressor.

[0007] Preferably, the condenser module of the three-in-one condenser-throttling-evaporation plate-fin heat exchanger has a first interface at the inlet for connecting to a high-pressure controller; the capillary flow unit is connected to the outlet side of the condenser module, and the outlet of the capillary flow unit has a second interface for connecting to a dryer filter. The inlet of the evaporation unit is connected to the capillary flow unit, and a third interface is provided at the inlet of the evaporation unit for connecting the expansion valve. The evaporator unit has a fourth interface at its outlet for connecting to a low-pressure controller.

[0008] Preferably, a cooling water inlet is provided at the lower right end of the condenser-throttling-evaporation three-in-one plate-fin heat exchanger, and a cooling water outlet is provided at the upper right end of the condenser-throttling-evaporation three-in-one plate-fin heat exchanger. A cooling water flow channel is formed between the cooling water inlet and the cooling water outlet, which runs through the condenser module and is used to connect the cooling tower circulation.

[0009] Preferably, the lower left end of the condensing-throttling-evaporating three-in-one plate-fin heat exchanger is provided with a chilled water return port for connecting to the normal temperature water inlet, and the upper left end of the condensing-throttling-evaporating three-in-one plate-fin heat exchanger is provided with a chilled water outlet for connecting to the chilled water outlet. A chilled water flow channel penetrating the evaporation unit is provided between the chilled water return port and the chilled water outlet.

[0010] Preferably, the refrigerant compressor is a scroll compressor, and the high-pressure controller and low-pressure controller are located at the outlet and inlet of the refrigerant compressor, respectively.

[0011] Preferably, the condenser-throttling-evaporation three-in-one plate-fin heat exchanger is made of aluminum alloy, and its internal condenser module, capillary throttling unit and evaporation unit are connected as one unit through a precision welding process.

[0012] Preferably, the inlet and outlet of the evaporation unit of the three-in-one plate-fin heat exchanger (condensation, throttling, and evaporation) are connected to a water pump, and the water pump is a centrifugal pump.

[0013] Preferably, a temperature-controlled bypass valve is provided between the water pump outlet and the condenser-throttling-evaporation three-in-one plate-fin heat exchanger.

[0014] Preferably, the expansion valve is an electronic expansion valve.

[0015] The technical effects and advantages of this invention are as follows: The ambient temperature cold water from the cooling tower enters the condenser module of the condenser-throttling-evaporation three-in-one plate-fin heat exchanger, where it exchanges heat with the high-temperature refrigerant inside the condenser. After absorbing the heat released by the refrigerant, it becomes hot water and then flows back to the cooling tower for cooling. The cooled water is then transported back to the condenser module to complete the cycle.

[0016] The water pump draws in room temperature water and delivers it to the evaporation unit of the condenser-throttling-evaporation three-in-one plate-fin heat exchanger. The room temperature water exchanges heat with the low-temperature refrigerant in the evaporation unit. After the heat is absorbed by the refrigerant, the room temperature water becomes chilled water. The chilled water is delivered to equipment or places that need cooling. After releasing the cold energy, the temperature rises and it is drawn back into the water pump to re-enter the evaporation unit for heat exchange, forming a cycle.

[0017] High degree of integration: It adopts a three-in-one plate-fin heat exchanger that combines condenser, throttling device and evaporator in traditional water chiller units, which greatly reduces the number of components in the equipment, makes the unit structure more compact, significantly reduces the equipment's footprint, and is suitable for places with limited space.

[0018] Low energy loss and high cooling efficiency: The integrated design reduces the energy loss caused by the connection pipes of multiple components in traditional equipment. At the same time, the plate-fin structure has high heat exchange performance, which improves the heat exchange efficiency between refrigerant and water, thereby improving the cooling efficiency of the entire unit.

[0019] Easy installation and maintenance: Due to the reduced number of components and compact structure, the installation process of the unit is simpler, saving installation time and costs; at the same time, the simplified structure also reduces the difficulty of maintenance, making it easier for later inspection and maintenance.

[0020] Stable and reliable operation: Through the coordinated action of components such as the high-pressure controller, low-pressure controller and temperature control bypass valve, the unit's operating status is precisely controlled and monitored in real time to ensure that the unit operates in a safe and stable state and to guarantee the stability of the cooling effect. Attached Figure Description

[0021] Figure 1 A schematic diagram of the overall structure of the invention; Figure 2 A schematic diagram of the structure of a combined condenser, throttling, and evaporation plate-fin heat exchanger for invention. Figure 3 A schematic diagram showing the integration of the condenser module, capillary throttling unit, and evaporation unit in a three-in-one plate-fin heat exchanger for invention. Figure 4 A schematic diagram of the internal structure of the three-in-one plate-fin heat exchanger for condensation, throttling and evaporation. Figure 5 Enlarged view of part of the structure of the three-in-one plate-fin heat exchanger for condensation, throttling and evaporation; Figure 6 To develop a flowchart for the operation control of a refrigerant compressor.

[0022] In the diagram: 1. Refrigerant compressor; 2. High-pressure controller; 21. First port; 3. Condensation, throttling, and evaporation three-in-one plate-fin heat exchanger; 31. Cooling water inlet; 32. Cooling water outlet; 33. Chilled water return port; 34. Chilled water outlet; 4. Dryer filter; 41. Second port; 5. Expansion valve; 51. Third port; 6. Low-pressure controller; 61. Fourth port; 7. Water pump; 8. Temperature-controlled bypass valve. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] This invention provides, for example Figures 1-6 The highly integrated compact chiller unit shown includes a refrigerant compressor 1, a high-pressure controller 2, and a condenser-throttling-evaporator integrated plate-fin heat exchanger 3. The high-pressure controller 2 is connected to the outlet side of the refrigerant compressor 1. The condenser-throttling-evaporator integrated plate-fin heat exchanger 3 integrates a condenser module, a capillary flow unit, and an evaporator unit. The inlet of the condenser module is connected to the high-pressure controller 2, and the outlet of the evaporator unit is connected to the inlet of the refrigerant compressor 1. A dryer filter 4 is connected between the capillary flow unit of the condenser-throttling-evaporator integrated plate-fin heat exchanger 3 and the expansion valve 5. A low-pressure controller 6 is connected between the evaporator unit of the condenser-throttling-evaporator integrated plate-fin heat exchanger 3 and the refrigerant compressor 1.

[0025] The internal plate-fin heat exchanger, which combines condensation, throttling, and evaporation, consists mainly of baffles, fins, and seals. The baffle is a thin plate with parallel top and bottom, which serves to separate the flow channels and provide support; The fins are serrated fins sandwiched between adjacent partitions, which enhance heat transfer by increasing the heat transfer area and disturbing the fluid. The seals are placed at both ends of the fins and between different fluids, forming independent flow channels together with the baffles and fins.

[0026] Multiple layers of baffles and fins are alternately stacked and brazed to form a whole. Cold and hot fluids can be introduced into different flow channels, and heat exchange is achieved through the fins and baffles.

[0027] The condenser, throttling, and evaporation three-in-one plate-fin heat exchanger 3 adopts an aluminum plate-fin structure, with internal fins arranged in all internal flow channels to improve heat transfer efficiency.

[0028] By integrating a micro-fin array within the flow channel through a precision stamping process, the fin height is controlled within the range of 0.5mm to 1.0mm and the spacing is uniform to below 0.3mm, effectively increasing the specific surface area by more than 40% and enhancing the fluid turbulence effect, significantly improving the heat transfer coefficient to above 5000W / m²K.

[0029] Relying on the large specific surface area and strong heat transfer capacity of the plate-fin structure itself, the integrated design of the internal flow channel and capillary structure enables the refrigerant to complete the continuous state transformation from condensation to throttling and then from throttling to evaporation within the same structure. This eliminates the redundancy of the connecting pipes between traditional components, achieves the minimization of space occupation and the synergy of heat exchange process, and improves the compactness and utilization efficiency of the condensation, throttling and evaporation three-in-one plate-fin heat exchanger 3.

[0030] The refrigerant compressor 1 is used to compress the refrigerant. The refrigerant compressor 1 is the power source of the unit, which turns the refrigerant into high-temperature and high-pressure refrigerant vapor. High-pressure controller 2 is used to monitor and control the refrigerant pressure on the high-pressure side. When the pressure exceeds the set value, it sends a signal and takes protective measures to ensure the safe operation of the equipment. The condenser module receives high-temperature, high-pressure refrigerant vapor, and the capillary delta unit throttles the refrigerant. The inlet of the evaporator unit is connected to the capillary delta unit, and the outlet is connected to the inlet of the refrigerant compressor 1. The high-temperature, high-pressure refrigerant vapor in the refrigerant compressor 1 enters the condenser module after being regulated by the high-pressure controller 2. The high-temperature, high-pressure refrigerant vapor exchanges heat with the ambient-temperature chilled water from the cooling tower. After releasing heat, the refrigerant condenses into a medium-temperature, medium-pressure liquid refrigerant. The condenser module is connected to the capillary delta unit, and the medium-temperature, medium-pressure liquid refrigerant enters the capillary delta unit. After throttling, it becomes a low-temperature, low-pressure mixture of liquid and gaseous refrigerant.

[0031] Inside the plate-fin core, the outlet flow channel of the condenser module is directly connected to the inlet flow channel of the capillary flow unit through the flow channel formed by the internal baffle and the seal. The outlet flow channel of the capillary flow unit is also directly connected to the inlet flow channel of the evaporation unit through a flow channel formed by internal baffles and seals.

[0032] The flow path of the refrigerant inside the core is as follows: after the high-pressure refrigerant liquid flows out from the condenser module, it directly enters the adjacent capillary sprue unit area for preliminary throttling. After throttling, the gas-liquid two-phase refrigerant directly enters the adjacent evaporation unit area for evaporation and heat absorption.

[0033] The plate-fin core of the condenser-throttling-evaporation three-in-one plate-fin heat exchanger (3) is divided into a condenser module area, a capillary throttling unit area and an evaporation unit area along the refrigerant flow direction.

[0034] The capillary flow unit area is enclosed by baffles, fins and seals. By designing denser fins and / or narrower flow channel cross-sections in this area, a fixed throttling resistance to the refrigerant flow is formed, achieving first-stage throttling.

[0035] Dryer filter 4 is used to remove moisture and impurities from the refrigerant, preventing moisture from freezing and clogging pipes at low temperatures and impurities from damaging downstream components; The low-pressure controller 6 monitors the pressure of the refrigerant on the low-pressure side. When the pressure is lower than the set value, a protection mechanism is triggered to prevent the refrigerant compressor 1 from being damaged due to excessively low suction pressure. After passing through the low-pressure controller 6, the superheated gaseous refrigerant is drawn back into the refrigerant compressor 1 for compression, completing the refrigerant cycle.

[0036] The inlet and outlet of the evaporation unit of the condensing, throttling, and evaporating three-in-one plate-fin heat exchanger 3 are connected to a water pump 7. The water pump 7 is responsible for driving water to circulate in the system, delivering room temperature water to the evaporation unit of the condensing, throttling, and evaporating three-in-one plate-fin heat exchanger 3 for heat exchange, and then delivering chilled water to places that need cooling.

[0037] A temperature-controlled bypass valve 8 is installed between the outlet of the water pump 7 and the condenser-throttling-evaporation three-in-one plate-fin heat exchanger 3. The temperature-controlled bypass valve 8 monitors the temperature of the ambient temperature water being drawn in in real time. When the ambient temperature water temperature is detected to be lower than the set chilled water outlet temperature, the water flow path will be automatically switched so that the ambient temperature water being drawn in can flow directly through the bypass pipe without entering the evaporation unit for evaporation and cooling, and can flow directly out of the chiller unit.

[0038] This design avoids unnecessary energy consumption and ensures improved system operating efficiency while meeting the required outlet water temperature.

[0039] In the evaporation unit, the refrigerant absorbs heat from the ambient temperature water supplied by the water pump 7, turning the ambient temperature water into chilled water which is then delivered to the refrigeration area. The refrigerant evaporates into a low-pressure superheated gaseous state, which returns to the refrigerant compressor 1 via the low-pressure controller 6, completing the cycle. At the same time, the water circulation and chilled water circulation of the cooling tower operate stably along their respective paths.

[0040] The unit's water circulation system has two main circulation paths; The ambient temperature cold water from the cooling tower enters the condenser module of the condenser-throttling-evaporation three-in-one plate-fin heat exchanger 3, where it exchanges heat with the high temperature refrigerant in the condenser. After absorbing the heat released by the refrigerant, it becomes hot water and flows back to the cooling tower for cooling. The cooled water is then transported back to the condenser module to complete the cycle.

[0041] Water pump 7 draws in room temperature water and delivers it to the evaporation unit of the condenser-throttling-evaporation three-in-one plate-fin heat exchanger 3. The room temperature water exchanges heat with the low temperature refrigerant in the evaporation unit. After the heat is absorbed by the refrigerant, the room temperature water becomes chilled water. The chilled water is delivered to equipment or places that need cooling. After releasing the cold energy, the temperature rises and it is drawn back into water pump 7 to re-enter the evaporation unit for heat exchange, forming a cycle.

[0042] The condenser, throttling and evaporation three-in-one plate-fin heat exchanger 3 is made of aluminum alloy. Its internal condenser module, capillary throttling unit and evaporation unit are connected as one unit through a precision welding process.

[0043] The condenser, throttling device and evaporator are integrated into one plate-fin heat exchanger 3, which greatly reduces the number of components in the traditional water chiller unit, making the unit structure more compact and significantly reducing the footprint of the equipment, making it suitable for places with limited space.

[0044] The integrated design reduces energy loss caused by connecting pipes for multiple components in traditional equipment. At the same time, the plate-fin structure has high heat exchange performance, which improves the heat exchange efficiency between refrigerant and water, thereby improving the overall cooling efficiency of the unit. The reduced number of components and compact structure make the installation process of the unit simpler, saving installation time and costs. At the same time, the simplified structure also reduces the difficulty of maintenance and facilitates later inspection and maintenance.

[0045] The condenser module of the three-in-one plate-fin heat exchanger 3, which combines condensation, throttling and evaporation, has a first interface 21 at its inlet for connecting to the high-pressure controller 2. A second interface 41 is provided at the outlet of the capillary flow unit for connecting the dryer filter 4; A third interface 51 is provided at the inlet of the evaporation unit for connecting the expansion valve 5; The outlet of the evaporation unit is provided with a fourth interface 61 for connecting the low-pressure controller 6.

[0046] The refrigerant compressor 1 compresses the refrigerant into high-temperature, high-pressure steam, which then enters the condenser module of the three-in-one plate-fin heat exchanger 3 via the high-pressure controller 2. The condenser module exchanges heat with ambient-temperature chilled water from the cooling tower. After the refrigerant condenses into a medium-temperature, medium-pressure liquid, it enters the capillary throttling unit for throttling, becoming a gas-liquid mixture. After being filtered by the dryer filter 4, it is further throttled by the electronic expansion valve and enters the evaporation unit. Then, it flows back to the refrigerant compressor 1 via the low-pressure controller 6, where the refrigerant is compressed into high-temperature, high-pressure steam.

[0047] The capillary flow unit is a primary throttling device. Together with the external electronic expansion valve, it forms a two-stage throttling system. The capillary flow unit performs primary throttling by providing a fixed base pressure reduction, and the external electronic expansion valve performs secondary throttling.

[0048] Example 1: The lower right end of the condenser-throttling-evaporation three-in-one plate-fin heat exchanger 3 is provided with a cooling water inlet 31, and the upper right end of the condenser-throttling-evaporation three-in-one plate-fin heat exchanger 3 is provided with a cooling water outlet 32. A cooling water flow channel is formed between the cooling water inlet 31 and the cooling water outlet 32, which runs through the condenser module. The cooling water flow channel is used to connect the cooling tower circulation.

[0049] The refrigerant compressor 1 compresses the refrigerant into high-temperature and high-pressure steam, which enters the condenser module of the condenser-throttling-evaporation three-in-one plate-fin heat exchanger 3 through the high-pressure controller 2. It exchanges heat with the ambient temperature cold water from the cooling tower through the cooling water inlet 31, absorbs the heat released by the refrigerant, and becomes hot water. Then, it flows back to the cooling tower through the cooling water outlet 32 ​​for cooling.

[0050] The lower left end of the condensing, throttling, and evaporating three-in-one plate-fin heat exchanger 3 is provided with a chilled water return port 33 for connecting to the normal temperature water inlet, and the upper left end of the condensing, throttling, and evaporating three-in-one plate-fin heat exchanger 3 is provided with a chilled water outlet 34 for connecting to the chilled water outlet. A chilled water flow channel penetrating the evaporation unit is provided between the chilled water return port 33 and the chilled water outlet 34.

[0051] Water pump 7 draws in room temperature water and delivers it to the evaporation unit of the condenser-throttling-evaporation three-in-one plate-fin heat exchanger 3. The room temperature water exchanges heat with the low temperature refrigerant in the evaporation unit. After the heat is absorbed by the refrigerant, the room temperature water becomes chilled water. The chilled water is delivered to equipment or places that need to be refrigerated. After releasing the cold energy, the temperature rises and is drawn back into water pump 7, re-entering the evaporation unit for heat exchange, forming a cycle. The chilled water outlet and ambient temperature water inlet are connected to the inlet and outlet of the refrigeration equipment, respectively. The temperature-controlled bypass valve 8 is connected to both the chilled water outlet and the ambient temperature water inlet. The ambient temperature water temperature is monitored in real time by the temperature-controlled bypass valve 8. When the ambient temperature water temperature is detected to be lower than the set chilled water outlet temperature, the water flow path is automatically switched, allowing the ambient temperature water to flow directly through the temperature-controlled bypass valve 8 pipeline for short-circuit circulation. It can flow directly out of the chiller unit without entering the evaporation unit for evaporative cooling.

[0052] Example 2: The refrigerant compressor 1 is a scroll compressor. This type of compressor is characterized by high efficiency and stable operation. The high-pressure controller 2 and the low-pressure controller 6 are set at the outlet and inlet of the refrigerant compressor 1 to accurately monitor and control the refrigerant pressure.

[0053] Through the coordinated action of components such as the high-pressure controller 2, the low-pressure controller 6, and the temperature-controlled bypass valve 8, the operating status of the unit is precisely controlled and monitored in real time, ensuring that the unit operates in a safe and stable state and guaranteeing stable cooling performance.

[0054] Pump 7 is a centrifugal pump, which has the characteristics of stable flow and suitable head.

[0055] Expansion valve 5 is an electronic expansion valve. The electronic expansion valve precisely controls the flow rate of refrigerant entering the evaporation unit of the three-in-one plate-fin heat exchanger 3 (condenser-throttling-evaporation) according to the operating conditions of the unit, ensuring the stability and efficiency of the evaporation process.

[0056] The mixed refrigerant from the dryer filter 4 is further throttled and depressurized by the electronic expansion valve, becoming low-temperature and low-pressure refrigerant vapor.

[0057] like Figure 3 The refrigerant compressor operation control process shown is as follows: the high-pressure controller 2 monitors the condensing pressure in real time. If the pressure is greater than the safety threshold, the first-level response is: to issue an alarm and reduce the opening of the electronic expansion valve to reduce the refrigerant flow. Level 2 response: Reduce the speed of refrigerant compressor 1; Level 3 response: Stop refrigerant compressor 1; If the pressure is normal, operation continues, while the low-pressure controller 6 monitors the evaporation pressure in real time; If the pressure is lower than the safety threshold, increase the opening of the electronic expansion valve to increase the refrigerant flow. If the pressure remains low, stop the refrigerant compressor 1 to avoid damage; If the pressure returns to normal, continue operation.

[0058] Temperature control in this embodiment: Outlet water temperature control: The system monitors the chilled water outlet temperature, with a target value of 7℃±1℃; If the temperature is above 8℃, adjust the opening of the electronic expansion valve to increase the refrigerant flow and increase the speed of the refrigerant compressor. If the temperature is below 6℃, adjust the opening of the electronic expansion valve to reduce the refrigerant flow and reduce the speed of refrigerant compressor 1; If the temperature is normal, maintain the current settings.

[0059] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A highly integrated and compact chiller unit, characterized in that, The device includes a refrigerant compressor (1), a high-pressure controller (2), and a condenser-throttling-evaporation three-in-one plate-fin heat exchanger (3). The high-pressure controller (2) is connected to the outlet side of the refrigerant compressor (1). The condenser-throttling-evaporation three-in-one plate-fin heat exchanger (3) integrates a condenser module, a capillary flow unit, and an evaporation unit. The inlet of the condenser module is connected to the high-pressure controller (2), and the outlet of the evaporation unit is connected to the inlet of the refrigerant compressor (1). A dryer filter (4) is connected between the capillary flow unit of the condenser-throttling-evaporation three-in-one plate-fin heat exchanger (3) and the expansion valve (5). A low-pressure controller (6) is connected between the evaporation unit of the condenser-throttling-evaporation three-in-one plate-fin heat exchanger (3) and the refrigerant compressor (1).

2. The highly integrated compact chiller unit according to claim 1, characterized in that, The condenser module of the three-in-one plate-fin heat exchanger (3) is provided with a first interface (21) for connecting to the high-pressure controller (2). The capillary flow unit is connected to the outlet side of the condenser module. A second interface (41) is provided at the outlet of the capillary flow unit for connecting the dryer filter (4). The inlet of the evaporation unit is connected to the capillary flow unit, and a third interface (51) is provided at the inlet of the evaporation unit for connecting the expansion valve (5). A fourth interface (61) is provided at the outlet of the evaporation unit for connecting to the low-pressure controller (6).

3. The highly integrated and compact chiller unit according to claim 1, characterized in that, The lower right end of the condenser-throttling-evaporation three-in-one plate-fin heat exchanger (3) is provided with a cooling water inlet (31), and the upper right end of the condenser-throttling-evaporation three-in-one plate-fin heat exchanger (3) is provided with a cooling water outlet (32). A cooling water flow channel is formed between the cooling water inlet (31) and the cooling water outlet (32) through the condenser module. The cooling water flow channel is used to connect the cooling tower circulation.

4. The highly integrated compact chiller unit according to claim 1, characterized in that, The lower left end of the condensing-throttling-evaporating three-in-one plate-fin heat exchanger (3) is provided with a chilled water return port (33) for connecting to the normal temperature water inlet, and the upper left end of the condensing-throttling-evaporating three-in-one plate-fin heat exchanger (3) is provided with a chilled water outlet (34) for connecting to the chilled water outlet. A chilled water flow channel penetrating the evaporation unit is provided between the chilled water return port (33) and the chilled water outlet (34).

5. The highly integrated compact chiller unit according to claim 1, characterized in that, The refrigerant compressor (1) is a scroll compressor, and the high-pressure controller (2) and the low-pressure controller (6) are located at the outlet and inlet of the refrigerant compressor (1).

6. The highly integrated compact chiller unit according to claim 1, characterized in that, The condenser, throttling and evaporation three-in-one plate-fin heat exchanger (3) is made of aluminum alloy material, and its internal condenser module, capillary throttling unit and evaporation unit are connected as one unit by a precision welding process.

7. The highly integrated compact chiller unit according to claim 1, characterized in that, The inlet and outlet of the evaporation unit of the three-in-one plate-fin heat exchanger (3) for condensation, throttling and evaporation are connected to a water pump (7), and the water pump (7) is a centrifugal pump.

8. The highly integrated compact chiller unit according to claim 7, characterized in that, A temperature-controlled bypass valve (8) is provided between the outlet of the water pump (7) and the condenser-throttling-evaporation three-in-one plate-fin heat exchanger (3).

9. The highly integrated compact chiller unit according to claim 1, characterized in that, The expansion valve (5) is an electronic expansion valve.

10. The highly integrated compact chiller unit according to claim 1, characterized in that, The three-in-one plate-fin heat exchanger of condensation, throttling and evaporation (3) The internal plate-fin core is mainly composed of baffles, fins and seals. The baffles are thin plates with parallel upper and lower sides, and the fins are serrated fins sandwiched between adjacent baffles. The seals are located at the ends of the fins on both sides and between different fluids, forming independent flow channels together with the baffles and fins. Multiple baffles and fins are alternately superimposed and brazed to form a whole.

Images