Air compressor refrigeration system and air compressor system

Abstract

The application provides an air compressor refrigeration system and an air compressor system, which comprise a cooling liquid cooling circuit, a heat exchanger, an indirect water cooling circuit and a first water cooling circuit. The cooling liquid cooling circuit and the indirect water cooling circuit are communicated with the heat exchanger, so that the cooling liquid is cooled by water in the heat exchanger. The cooling liquid cooling circuit and the first water cooling circuit are respectively and selectively communicated with a motor in the air compressor. The air compressor refrigeration system has a first mode and a second mode. In the first mode, the cooling liquid cooling circuit is communicated with the motor to cool the motor, and the first water cooling circuit is not communicated with the motor. In the second mode, the cooling liquid cooling circuit is not communicated with the motor, and the first water cooling circuit is communicated with the motor to cool the motor. Through dynamic switching between the two cooling modes, the refrigeration efficiency and energy consumption are reasonably matched, so that the energy efficiency ratio of the overall operation of the system is improved.

Description

Technical Field

[0001] This invention relates to the field of air compressor technology, and more specifically, to an air compressor refrigeration system and an air compressor system. Background Technology

[0002] Air compressors have been widely used in industrial manufacturing, energy, medical and other fields in recent years. However, the motor of an air compressor generates a lot of heat during operation. If it is not cooled sufficiently, it can easily lead to overheating, performance degradation or even damage to the equipment.

[0003] However, the cooling systems of existing air compressors typically use a single cooling medium circulation method, such as directly using external cooling water or configuring an independent internal circulation coolant system. This cannot be dynamically adjusted according to actual working conditions, ultimately affecting the motor cooling effect. Summary of the Invention

[0004] This invention provides an air compressor refrigeration system and an air compressor system to solve the problem that the cooling system in the prior art cannot be dynamically adjusted, which affects the cooling effect of the motor.

[0005] To address the aforementioned problems, according to one aspect of the present invention, an air compressor refrigeration system is provided, comprising a coolant cooling circuit, a heat exchanger, an indirect water cooling circuit, and a first water cooling circuit. Both the coolant cooling circuit and the indirect water cooling circuit are connected to the heat exchanger to cool the coolant using water within the heat exchanger. The coolant cooling circuit and the first water cooling circuit are respectively and intermittently connected to a motor in the air compressor. The air compressor refrigeration system has a first mode and a second mode. In the first mode, the coolant cooling circuit is connected to the motor to cool the motor, while the first water cooling circuit is not connected to the motor. In the second mode, the coolant cooling circuit is not connected to the motor, while the first water cooling circuit is connected to the motor to cool the motor.

[0006] Furthermore, the air compressor refrigeration system also includes a liquid receiver, which has a first coolant inlet and a first coolant outlet. The heat exchanger has a second coolant inlet and a second coolant outlet. The coolant cooling circuit includes a first pipe, a second pipe, and a third pipe. The two ends of the first pipe are connected to the first coolant inlet and the second coolant outlet, respectively. One end of the second pipe is connected to the first coolant outlet, and the other end of the second pipe is connected to the motor inlet in a switchable manner. One end of the third pipe is connected to the motor outlet in a switchable manner, and the other end of the third pipe is connected to the second coolant inlet.

[0007] Furthermore, the first water-cooling circuit includes a fourth pipe and a fifth pipe. One end of the fourth pipe is connected to a cooling water source, and the other end of the fourth pipe is connected to the motor inlet in a way that can be switched on and off. One end of the fifth pipe is connected to the motor outlet in a way that can be switched on and off, and the other end of the fifth pipe is connected to a cooling water source.

[0008] Furthermore, the air compressor refrigeration system also includes an intercooler and a second water-cooling circuit, which is connected to the intercooler to cool the compressed air inside the intercooler.

[0009] Furthermore, the intercooler has a cooling water inlet and a cooling water outlet, and the second water-cooled circuit includes a sixth pipe and a seventh pipe. One end of the sixth pipe is connected to the cooling water source, and the other end of the sixth pipe is connected to the cooling water inlet. One end of the seventh pipe is connected to the cooling water outlet, and the other end of the seventh pipe is connected to the cooling water source.

[0010] Furthermore, the air compressor refrigeration system also includes a first four-way valve, a second four-way valve, and an intercooler. The four ports of the first four-way valve are respectively connected to the cooling water source, the heat exchanger, the motor, and the intercooler in a way that can be switched on and off. The four ports of the second four-way valve are respectively connected to the cooling water source, the heat exchanger, the motor, and the intercooler in a way that can be switched on and off. The air compressor refrigeration system can be switched between a first mode and a second mode by using the first four-way valve and the second four-way valve.

[0011] Furthermore, the air compressor refrigeration system also includes a second water-cooled circuit. The first water-cooled circuit includes a fourth and a fifth pipe, the second water-cooled circuit includes a sixth and a seventh pipe, and the indirect water-cooled circuit includes an eighth and a ninth pipe. The first four-way valve has a first valve port, a second valve port, a third valve port, and a fourth valve port. The second four-way valve has a fifth valve port, a sixth valve port, a seventh valve port, and an eighth valve port. The intercooler has a cooling water inlet and a cooling water outlet. The two ends of the fourth pipe are connected to the fourth valve port and the motor inlet, respectively. The two ends of the fifth pipe are connected to the eighth valve port, respectively. The sixth pipe is connected to the outlet of the motor, and the two ends of the sixth pipe are connected to the third valve port and the cooling water inlet, respectively. The two ends of the seventh pipe are connected to the seventh valve port and the cooling water outlet, respectively. The two ends of the eighth pipe are connected to the second valve port and the inlet of the heat exchanger, respectively. The two ends of the ninth pipe are connected to the sixth valve port and the outlet of the heat exchanger, respectively. In the first mode, the second, third, fifth, and sixth valve ports are open, and the fourth and eighth valve ports are closed. In the second mode, the fourth and eighth valve ports are open, and the second, third, fifth, and sixth valve ports are closed.

[0012] Furthermore, the air compressor refrigeration system also includes a first temperature sensor and a second temperature sensor. The first temperature sensor is installed on the first valve port to detect the temperature of the cooling water input from the external cooling water pipe, and the second temperature sensor is installed at the motor inlet to detect the temperature of the coolant or cooling water input to the motor.

[0013] Furthermore, the air compressor refrigeration system also includes a first three-way valve, a second three-way valve, and a liquid receiver. The first three-way valve has a coolant inlet, a cooling water inlet, and a main inlet. The second three-way valve has a coolant outlet, a cooling water outlet, and a main outlet. The coolant cooling circuit includes a second pipe and a third pipe, and the first water cooling circuit includes a fourth pipe and a fifth pipe. One end of the main inlet is connected to the motor inlet, and the other end of the main inlet is connected to the coolant inlet and the cooling water inlet. One end of the second pipe is connected to the coolant outlet... The inlet can be switched on and off. The other end of the second pipe is connected to the liquid reservoir. One end of the fourth pipe is switched on and off to the cooling water inlet. The other end of the fourth pipe is connected to the cooling water source. One end of the main outlet is connected to the motor outlet. The other end of the main outlet is connected to the coolant outlet and the cooling water outlet. One end of the third pipe is switched on and off to the coolant outlet. The other end of the third pipe is connected to the heat exchanger. One end of the fifth pipe is switched on and off to the cooling water outlet. The other end of the fifth pipe is connected to the cooling water source.

[0014] Furthermore, the air compressor refrigeration system also includes a delivery pump, which is installed on the second pipeline.

[0015] According to another aspect of the present invention, an air compressor system is provided, including an air compressor and the aforementioned air compressor refrigeration system, wherein the air compressor refrigeration system is used to cool the air compressor.

[0016] By applying the technical solution of this invention, and by setting a first mode and a second mode, the air compressor refrigeration system can select either a coolant cooling circuit or a first water-cooling circuit to dissipate heat from the motor based on external water quality conditions and operating load. When the external cooling water quality is poor or scaling and corrosion need to be avoided, the first mode can be used to cool the motor using a coolant cooling circuit. In the first mode, the external cooling water undergoes indirect heat exchange with the coolant through a heat exchanger, thereby preventing mineral impurities in the external cooling water from directly entering the motor cooling channel, reducing the risk of scaling and corrosion, extending the service life of the motor and piping system, ensuring long-term stable operation of the motor, and reducing maintenance costs. Under high load conditions, the system can switch to the second mode, using the first water-cooling circuit for direct water cooling to quickly improve heat dissipation efficiency and adapt to changing application environments. By dynamically switching between the two cooling modes, a reasonable match between cooling efficiency and energy consumption is achieved, thereby improving the overall energy efficiency ratio of the system. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1A schematic diagram of the structure of an air compressor refrigeration system provided in an embodiment of the present invention is shown; Figure 2 It shows Figure 1 Schematic diagram of the structure of the first four-way valve in the middle; Figure 3 It shows Figure 1 Schematic diagram of the structure of the second four-way valve; Figure 4 It shows Figure 1 Schematic diagram of the structure of the first three-way valve in the middle; Figure 5 It shows Figure 1 A schematic diagram of the structure of the second three-way valve.

[0018] The above figures include the following reference numerals: 10. Coolant cooling circuit; 11. First pipe; 12. Second pipe; 13. Third pipe; 20. Heat exchanger; 21. Second coolant inlet; 22. Second coolant outlet; 30. Indirect water cooling circuit; 31. Eighth pipe; 32. Ninth pipe; 40. First water cooling circuit; 41. Fourth pipe; 42. Fifth pipe; 50. Second water cooling circuit; 51. Sixth pipe; 52. Seventh pipe; 61. Motor; 62. Receiver; 63. Intercooler; 71. First four-way valve Valve; 711, First valve port; 712, Second valve port; 713, Third valve port; 714, Fourth valve port; 72, Second four-way valve; 721, Fifth valve port; 722, Sixth valve port; 723, Seventh valve port; 724, Eighth valve port; 73, First three-way valve; 731, Coolant inlet; 732, Cooling water inlet; 733, Main inlet; 74, Second three-way valve; 741, Coolant outlet; 742, Cooling water outlet; 743, Main outlet; 80, Transfer pump. Detailed Implementation

[0019] 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1 to 5As shown, an embodiment of the present invention provides an air compressor refrigeration system, including a coolant cooling circuit 10, a heat exchanger 20, an indirect water cooling circuit 30, and a first water cooling circuit 40. The coolant cooling circuit 10 and the indirect water cooling circuit 30 are both connected to the heat exchanger 20 to cool the coolant with water within the heat exchanger 20. The coolant cooling circuit 10 and the first water cooling circuit 40 are respectively connected to the motor 61 in the air compressor in an on / off manner. The air compressor refrigeration system has a first mode and a second mode. In the first mode, the coolant cooling circuit 10 is connected to the motor 61 to cool the motor 61, while the first water cooling circuit 40 is not connected to the motor 61. In the second mode, the coolant cooling circuit 10 is not connected to the motor 61, while the first water cooling circuit 40 is connected to the motor 61 to cool the motor 61.

[0021] In this embodiment, by setting a first mode and a second mode, the air compressor refrigeration system can select either the coolant cooling circuit 10 or the first water cooling circuit 40 to dissipate heat from the motor 61 based on external water quality conditions and operating load. When the external cooling water quality is poor or scaling and corrosion need to be avoided, the first mode can be used to cool the motor 61 using the coolant cooling circuit 10. In the first mode, the external cooling water undergoes indirect heat exchange with the coolant through the heat exchanger 20, thereby preventing mineral impurities in the external cooling water from directly entering the motor cooling channel, reducing the risk of scaling and corrosion, extending the service life of the motor and piping system, ensuring the long-term stable operation of the motor 61, and reducing maintenance costs. Under high load conditions, the system can switch to the second mode, using the first water cooling circuit 40 for direct water cooling to quickly improve heat dissipation efficiency and adapt to changing application environments. By dynamically switching between the two cooling modes, a reasonable match between cooling efficiency and energy consumption is achieved, thereby improving the overall energy efficiency ratio of the system.

[0022] The coolant can be ethylene glycol-based coolant, propylene glycol-based coolant, glycerin-based coolant, water-based coolant, refrigerant, etc., and the specific type can be selected according to actual needs.

[0023] like Figure 1 As shown, the air compressor refrigeration system also includes a liquid receiver 62, which has a first coolant inlet and a first coolant outlet. The heat exchanger 20 has a second coolant inlet 21 and a second coolant outlet 22. The coolant cooling circuit includes a first pipe 11, a second pipe 12 and a third pipe 13. The two ends of the first pipe 11 are connected to the first coolant inlet and the second coolant outlet 22, respectively. One end of the second pipe 12 is connected to the first coolant outlet, and the other end of the second pipe 12 is connected to the inlet of the motor 61 in a switchable manner. One end of the third pipe 13 is connected to the outlet of the motor 61 in a switchable manner, and the other end of the third pipe 13 is connected to the second coolant inlet 21.

[0024] In this embodiment, the coolant reservoir 62 can store and regulate the coolant during system operation, preventing changes in cooling efficiency due to insufficient or excessive instantaneous coolant supply. Furthermore, by providing the first pipe 11, the second pipe 12, and the third pipe 13, a circulation channel for the coolant is formed between the coolant reservoir 62, the heat exchanger 20, and the motor 61, improving the cooling effect between the coolant and the motor, thereby achieving rapid and stable cooling. The second pipe 12 and the third pipe 13 are respectively connected to the inlet and outlet of the motor 61, allowing for on / off connection. In different operating modes, the motor 61 can be cooled directly by the coolant, or the system can switch to the first water-cooling circuit 40 for heat dissipation.

[0025] like Figure 1 As shown, the first water-cooling circuit 40 includes a fourth pipe 41 and a fifth pipe 42. One end of the fourth pipe 41 is connected to a cooling water source, and the other end of the fourth pipe 41 is configurably connected to the inlet of the motor 61. One end of the fifth pipe 42 is configurably connected to the outlet of the motor 61, and the other end of the fifth pipe 42 is connected to a cooling water source. By connecting the cooling water source to the inlet of the motor 61 through the fourth pipe 41 and connecting the outlet of the motor to the cooling water source through the fifth pipe 42, a complete water-cooling path can be formed in the second mode. This allows external cooling water to flow directly through the cooling water channel of the motor 61, rapidly dissipating heat from the motor 61 and enhancing its heat dissipation capacity under high load conditions. Furthermore, since both the fourth pipe 41 and the fifth pipe 42 are configurably connected, they can be flexibly opened or closed under different operating conditions via valve control, thereby achieving mode switching.

[0026] like Figure 1 As shown, the air compressor refrigeration system also includes an intercooler 63 and a second water-cooling circuit 50. The second water-cooling circuit 50 is connected to the intercooler 63 to cool the compressed air inside the intercooler 63. Cooling water is supplied to the intercooler 63 through the second water-cooling circuit 50, so that the compressed air is sufficiently cooled before entering the subsequent pipelines or air tank. This not only reduces the temperature of the compressed air but also increases its density, thereby improving the overall compression efficiency of the air compressor.

[0027] like Figure 1 As shown, the intercooler 63 has a cooling water inlet and a cooling water outlet. The second water-cooled circuit 50 includes a sixth pipe 51 and a seventh pipe 52. One end of the sixth pipe 51 is connected to the cooling water source, and the other end of the sixth pipe 51 is connected to the cooling water inlet. One end of the seventh pipe 52 is connected to the cooling water outlet, and the other end of the seventh pipe 52 is connected to the cooling water source.

[0028] In this embodiment, the cooling water source is connected to the cooling water inlet of the intercooler 63 through the sixth pipe 51, and the cooling water outlet of the intercooler 63 is connected to the cooling water source through the seventh pipe 52. This enables the cooling water to form a stable flow path within the intercooler 63, thereby continuously removing the heat generated by the compressed air during the compression process and ensuring that the temperature of the compressed air is within a reasonable range.

[0029] like Figures 1 to 3 As shown, the air compressor refrigeration system also includes a first four-way valve 71, a second four-way valve 72, and an intercooler 63. The four valve ports of the first four-way valve 71 are respectively connected to the cooling water source, the heat exchanger 20, the motor 61, and the intercooler 63 in a way that can be switched on and off. The four valve ports of the second four-way valve 72 are respectively connected to the cooling water source, the heat exchanger 20, the motor 61, and the intercooler 63 in a way that can be switched on and off. The air compressor refrigeration system can be switched between a first mode and a second mode by means of the first four-way valve 71 and the second four-way valve 72.

[0030] In this embodiment, by combining the control of the first four-way valve 71 and the second four-way valve 72, a rapid switch between the first mode and the second mode can be achieved, avoiding the response delay caused by relying on the operation of multiple independent valves one by one in the traditional system. This improves the flexibility and timeliness of cooling mode switching, simplifies the pipeline layout, reduces the number of valves, reduces system complexity, and improves control efficiency.

[0031] like Figures 1 to 3As shown, the air compressor refrigeration system also includes a second water-cooled circuit 50. The first water-cooled circuit 40 includes a fourth pipe 41 and a fifth pipe 42. The second water-cooled circuit 50 includes a sixth pipe 51 and a seventh pipe 52. The indirect water-cooled circuit 30 includes an eighth pipe 31 and a ninth pipe 32. The first four-way valve 71 has a first valve port 711, a second valve port 712, a third valve port 713, and a fourth valve port 714. The second four-way valve 72 has a fifth valve port 721, a sixth valve port 722, a seventh valve port 723, and an eighth valve port 724. The intercooler 63 has a cooling water inlet and a cooling water outlet. The two ends of the fourth pipe 41 are connected to the fourth valve port 714 and the inlet of the motor 61, respectively. The two ends of the fifth pipe 42 are connected to the eighth valve port 724 and the inlet of the motor 61, respectively. The outlet of motor 61 is connected; the two ends of the sixth pipe 51 are connected to the third valve port 713 and the cooling water inlet, respectively; the two ends of the seventh pipe 52 are connected to the seventh valve port 723 and the cooling water outlet, respectively; the two ends of the eighth pipe 31 are connected to the second valve port 712 and the inlet of heat exchanger 20, respectively; and the two ends of the ninth pipe 32 are connected to the sixth valve port 722 and the outlet of heat exchanger 20, respectively. In the first mode, the second valve port 712, the third valve port 713, the fifth valve port 721, and the sixth valve port 722 are open, and the fourth valve port 714 and the eighth valve port 724 are closed. In the second mode, the fourth valve port 714 and the eighth valve port 724 are open, and the second valve port 712, the third valve port 713, the fifth valve port 721, and the sixth valve port 722 are closed.

[0032] In this embodiment, by controlling the different valve ports of the first four-way valve 71 and the second four-way valve 72, it is possible to flexibly select to connect the indirect water cooling circuit 30 or the first water cooling circuit 40 in the first mode and the second mode, while ensuring the cooling effect of the intercooler 63, thereby improving the accuracy and stability of the cooling mode switching.

[0033] Specifically, the air compressor refrigeration system also includes a first temperature sensor and a second temperature sensor. The first temperature sensor is installed on the first valve port 711 to detect the temperature of the cooling water input from the external cooling water pipe. The second temperature sensor is installed at the inlet of the motor 61 to detect the temperature of the coolant or cooling water input to the motor 61. By detecting the temperature of the external cooling water using the first temperature sensor and monitoring the temperature of the cooling medium at the inlet of the motor 61 using the second temperature sensor, it is possible to determine whether to switch from indirect cooling mode to direct water cooling mode based on real-time temperature changes, or to maintain indirect cooling mode when cooling demand is low, thereby avoiding frequent manual intervention.

[0034] like Figure 4 and Figure 5As shown, the air compressor refrigeration system also includes a first three-way valve 73, a second three-way valve 74, and a liquid receiver 62. The first three-way valve 73 has a coolant inlet 731, a cooling water inlet 732, and a total inlet 733. The second three-way valve 74 has a coolant outlet 741, a cooling water outlet 742, and a total outlet 743. The coolant cooling circuit includes a second pipe 12 and a third pipe 13. The first water cooling circuit 40 includes a fourth pipe 41 and a fifth pipe 42. One end of the total inlet 733 is connected to the inlet of the motor 61, and the other end of the total inlet 733 is connected to the coolant inlet 731 and the cooling water inlet 732. One end of the second pipe 12 is connected to... The coolant inlet 731 is openable and disconnectable. The other end of the second pipe 12 is connected to the reservoir 62. One end of the fourth pipe 41 is openable and disconnectable to the cooling water inlet 732. The other end of the fourth pipe 41 is connected to the cooling water source. One end of the total outlet 743 is connected to the outlet of the motor 61. The other end of the total outlet 743 is connected to the coolant outlet 741 and the cooling water outlet 742. One end of the third pipe 13 is openable and disconnectable to the coolant outlet 741. The other end of the third pipe 13 is connected to the heat exchanger 20. One end of the fifth pipe 42 is openable and disconnectable to the cooling water outlet 742. The other end of the fifth pipe 42 is connected to the cooling water source.

[0035] In this embodiment, by setting the first three-way valve 73 and the second three-way valve 74, the inlet and outlet of the motor 61 can be quickly switched between the coolant cooling circuit 10 and the first water cooling circuit 40 without relying on multiple independent valves for combined operation, which simplifies the system structure and control logic and improves the flexibility and response speed of cooling mode switching.

[0036] like Figure 1 As shown, the air compressor refrigeration system also includes a transfer pump 80, which is installed in the second pipeline 12 and can transfer the coolant in the liquid reservoir 62 to the inlet of the motor 61 to cool the motor 61.

[0037] Specifically, the first four-way valve 71, the second four-way valve 72, the first three-way valve 73, and the second three-way valve 74 each have multiple flow lines and multiple control components. Each control element is set on a flow line, and the control components are used to control the flow rate of cooling water or coolant in the flow line.

[0038] Embodiments of the present invention also provide an air compressor system, including an air compressor and the aforementioned air compressor refrigeration system, wherein the air compressor refrigeration system is used to cool the air compressor. The air compressor may be a magnetic levitation air compressor or other types of air compressors.

[0039] The above description is merely an optional embodiment of this solution and is not intended to limit the solution. Various modifications and variations can be made to this solution by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this solution should be included within the scope of protection of this solution.

[0040] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0041] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as exemplary only and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0042] In the description of this solution, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the attached drawings. It is only for the convenience of describing this solution and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or component referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this solution. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0043] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0044] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this solution.

Claims

1. A compressor refrigeration system, characterized in that, The system includes a coolant cooling circuit (10), a heat exchanger (20), an indirect water cooling circuit (30), and a first water cooling circuit (40). The coolant cooling circuit (10) and the indirect water cooling circuit (30) are both connected to the heat exchanger (20) to cool the coolant with water within the heat exchanger (20). The coolant cooling circuit (10) and the first water cooling circuit (40) are respectively connected to the motor (61) in the air compressor. The air compressor refrigeration system has a first mode and a second mode. In the first mode, the coolant cooling circuit (10) is connected to the motor (61) to cool the motor (61), while the first water cooling circuit (40) is not connected to the motor (61). In the second mode, the coolant cooling circuit (10) is not connected to the motor (61), while the first water cooling circuit (40) is connected to the motor (61) to cool the motor (61). The air compressor refrigeration system also includes a liquid receiver (62), which has a first coolant inlet and a first coolant outlet. The heat exchanger (20) has a second coolant inlet (21) and a second coolant outlet (22). The coolant cooling circuit includes a first pipe (11), a second pipe (12), and a third pipe (13). The two ends of the first pipe (11) are connected to the first coolant inlet and the second coolant outlet (22), respectively. One end of the second pipe (12) is connected to the first coolant outlet, and the other end of the second pipe (12) is connected to the inlet of the motor (61) in a switchable manner. One end of the third pipe (13) is connected to the outlet of the motor (61) in a switchable manner, and the other end of the third pipe (13) is connected to the second coolant inlet (21).

2. The air compressor refrigeration system according to claim 1, characterized in that, The first water-cooled circuit (40) includes a fourth pipe (41) and a fifth pipe (42). One end of the fourth pipe (41) is connected to a cooling water source, and the other end of the fourth pipe (41) is connected to the inlet of the motor (61) in a switchable manner. One end of the fifth pipe (42) is connected to the outlet of the motor (61) in a switchable manner, and the other end of the fifth pipe (42) is connected to a cooling water source.

3. The air compressor refrigeration system according to claim 1, characterized in that, The air compressor refrigeration system also includes an intercooler (63) and a second water-cooling circuit (50), the second water-cooling circuit (50) and the intercooler (63) being connected to cool the compressed air in the intercooler (63).

4. The air compressor refrigeration system according to claim 3, characterized in that, The intercooler (63) has a cooling water inlet and a cooling water outlet. The second water-cooled circuit (50) includes a sixth pipe (51) and a seventh pipe (52). One end of the sixth pipe (51) is connected to a cooling water source, and the other end of the sixth pipe (51) is connected to the cooling water inlet. One end of the seventh pipe (52) is connected to the cooling water outlet, and the other end of the seventh pipe (52) is connected to a cooling water source.

5. The air compressor refrigeration system according to claim 1, characterized in that, The air compressor refrigeration system further includes a first four-way valve (71), a second four-way valve (72), and an intercooler (63). The four ports of the first four-way valve (71) are respectively connected to the cooling water source, the heat exchanger (20), the motor (61), and the intercooler (63). The four ports of the second four-way valve (72) are respectively connected to the cooling water source, the heat exchanger (20), the motor (61), and the intercooler (63). The air compressor refrigeration system can be switched between the first mode and the second mode by means of the first four-way valve (71) and the second four-way valve (72).

6. The air compressor refrigeration system according to claim 5, characterized in that, The air compressor refrigeration system further includes a second water-cooled circuit (50). The first water-cooled circuit (40) includes a fourth pipe (41) and a fifth pipe (42). The second water-cooled circuit (50) includes a sixth pipe (51) and a seventh pipe (52). The indirect water-cooled circuit (30) includes an eighth pipe (31) and a ninth pipe (32). The first four-way valve (71) has a first valve port (711), a second valve port (712), a third valve port (713), and a fourth valve port. (714), the second four-way valve (72) has a fifth valve port (721), a sixth valve port (722), a seventh valve port (723) and an eighth valve port (724), the intercooler (63) has a cooling water inlet and a cooling water outlet, the two ends of the fourth pipe (41) are respectively connected to the fourth valve port (714) and the inlet of the motor (61), and the two ends of the fifth pipe (42) are respectively connected to the eighth valve port (724) and the outlet of the motor (61). The two ends of the sixth pipe (51) are connected to the third valve port (713) and the cooling water inlet, respectively; the two ends of the seventh pipe (52) are connected to the seventh valve port (723) and the cooling water outlet, respectively; the two ends of the eighth pipe (31) are connected to the second valve port (712) and the inlet of the heat exchanger (20), respectively; the two ends of the ninth pipe (32) are connected to the sixth valve port (722) and the outlet of the heat exchanger (20), respectively; In one mode, the second valve port (712), the third valve port (713), the fifth valve port (721), and the sixth valve port (722) are open, and the fourth valve port (714) and the eighth valve port (724) are closed; in the second mode, the fourth valve port (714) and the eighth valve port (724) are open, and the second valve port (712), the third valve port (713), the fifth valve port (721), and the sixth valve port (722) are closed.

7. The air compressor refrigeration system according to claim 6, characterized in that, The air compressor refrigeration system also includes a first temperature sensor and a second temperature sensor. The first temperature sensor is installed on the first valve port (711) to detect the temperature of the cooling water input from the external cooling water pipe. The second temperature sensor is installed at the inlet of the motor (61) to detect the temperature of the coolant or cooling water input to the motor (61).

8. The air compressor refrigeration system according to claim 1, characterized in that, The air compressor refrigeration system further includes a first three-way valve (73), a second three-way valve (74), and a liquid receiver (62). The first three-way valve (73) has a coolant inlet (731), a cooling water inlet (732), and a main inlet (733). The second three-way valve (74) has a coolant outlet (741), a cooling water outlet (742), and a main outlet (743). The coolant cooling circuit includes a second pipe (12) and a third pipe (13). The first water cooling circuit (40) includes a fourth pipe (41) and a fifth pipe (42). One end of the main inlet (733) is connected to the inlet of the motor (61), and the other end of the main inlet (733) is connected to the coolant inlet (731) and the cooling water inlet (732). One end of the second pipe (12) is connected to the cooling... The liquid inlet (731) is connected to the liquid reservoir (62) at one end, the cooling water inlet (732) at the other end, and the cooling water source at the other end. The total outlet (743) is connected to the outlet of the motor (61) at one end, and the cooling liquid outlet (741) and the cooling water outlet (742) at the other end. The cooling water source is connected to the cooling water source at one end, the cooling liquid outlet (741) and the cooling water outlet (742) at the other end. The cooling liquid outlet (741) and the cooling water outlet (742) at one end are connected to the cooling liquid outlet (741) at one end, and the heat exchanger (20) at the other end. The cooling water outlet (742) and the cooling water source are connected to the cooling water source at one end.

9. The air compressor refrigeration system according to claim 1, characterized in that, The air compressor refrigeration system also includes a delivery pump (80), which is installed in the second pipeline (12).

10. An air compressor system, characterized in that, The invention includes an air compressor and an air compressor refrigeration system according to any one of claims 1 to 9, wherein the air compressor refrigeration system is used to cool the air compressor.

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