Direct heat exchange type cooling-water machine device under multiple working conditions

Abstract

The invention discloses a multi-working-condition direct heat exchange type cooling-water machine device, relates to the technical field of cooling-water machines, and aims to solve the problems that an existing direct heat exchange type cooling-water machine has hysteresis quality in temperature control and cannot meet the temperature control requirements of various working conditions. The multi-working-condition direct heat exchange type cooling-water machine device comprises a circulating liquid loop and a cooling loop for cooling the circulating liquid loop; the cooling loop comprises a first cooling loop and a second cooling loop, a first heat exchanger is arranged between the first cooling loop and the circulating liquid loop, a second heat exchanger is arranged between the second cooling loop and the circulating liquid loop, and the first heat exchanger and the second heat exchanger are connected in parallel or in series; the circulating liquid loop comprises a storage loop, the storage loop is connected with a circulating liquid outlet loop, and the circulating liquid outlet loop is further connected with a circulating liquid recovery loop. According to the device, the maximum refrigerating capacity of the cooling-water machine can be improved without replacing a heat exchanger of a larger specification, and the temperature control requirements of various working conditions are met.

Description

Technical Field

[0001] The invention relates to the technical field of water chillers, and in particular to a multi-operating-condition direct heat exchange water chiller device. Background Art

[0002] Industrial chillers are widely used in industrial temperature control fields such as semiconductors, chemicals, medical treatment, and pharmaceuticals. Currently, the chillers on the market mainly work by using compressor refrigeration. In the process control from room temperature to 90 degrees, there are the following problems: the refrigeration circuit is required, the structure is complex, and the energy consumption and cost increase.

[0003] Direct heat exchange chillers have no compressor and do not pass through a cooling circuit. Instead, they exchange heat directly between the circulating fluid and the cooling water. Existing direct heat exchange chillers output circulating fluid from the water tank to the client device through a circulating pump. After cooling or heating the client device, the circulating fluid returns to the water tank through a heat exchanger of a certain specification. There are also the following two problems: First, the temperature control has a lag, and the target temperature can only be output after the circulating fluid in the entire water tank reaches the target temperature. Furthermore, only a single target temperature can be output. Second, if the maximum cooling capacity of the chiller needs to be changed, the required flow rate of the cooling water and the rated flow rate of the circulating fluid also need to be increased accordingly. At the same time, it is necessary to replace heat exchangers and water pumps of different specifications. Summary of the invention

[0004] The present invention solves the problem that the temperature control of the existing direct heat exchange chiller has a lag and cannot meet the temperature control requirements of various working conditions, and proposes a multi-working condition direct heat exchange chiller device, which can increase the maximum cooling capacity of the chiller without replacing a larger-sized heat exchanger, thereby meeting the temperature control requirements of various working conditions.

[0005] In order to achieve the above-mentioned objectives, the present invention adopts the following technical scheme: a multi-operating-mode direct heat exchange chiller device, comprising a circulating liquid circuit and a cooling circuit for cooling the circulating liquid circuit, the cooling circuit comprising a first cooling circuit and a second cooling circuit, a first heat exchanger is provided between the first cooling circuit and the circulating liquid circuit, a second heat exchanger is provided between the second cooling circuit and the circulating liquid circuit, the first heat exchanger and the second heat exchanger are connected in parallel or in series; the circulating liquid circuit comprises a storage circuit, the storage circuit is connected to a circulating liquid outlet circuit, and the circulating liquid outlet circuit is also connected to a circulating liquid recovery circuit.

[0006] A multi-operating condition direct heat exchange chiller device of the present technical solution mainly includes a circulating liquid circuit and a cooling circuit. The circulating liquid circuit is cooled by two cooling circuits, and two heat exchangers are arranged between the cooling circuit and the circulating liquid circuit. The heat exchangers are connected in parallel or in series by switching the connection relationship between the two heat exchangers, thereby increasing the maximum cooling capacity of the chiller to meet the temperature control requirements of various operating conditions.

[0007] The present invention is further configured as follows: the first cooling circuit includes a first ball valve, the water inlet end of the first ball valve is respectively connected to a first thermometer and a first cooling water inlet C1, the water outlet end of the first ball valve is connected to a water inlet end of a first heat exchanger, the water outlet end of the first heat exchanger is connected to a first cooling water outlet D1, and a first differential pressure sensor is provided between the first cooling water inlet C1 and the first cooling water outlet D1.

[0008] In the technical solution, in the first cooling circuit, a first thermometer is mainly provided for temperature detection and a first differential pressure sensor is provided for real-time flow reading and calculation.

[0009] The present invention is further configured as follows: the second cooling circuit includes a second ball valve, the water inlet end of the second ball valve is respectively connected to a second thermometer and a second cooling water inlet C2, the water outlet end of the second ball valve is connected to a water inlet end of a second heat exchanger, the water outlet end of the second heat exchanger is connected to a second cooling water outlet D2, and a second differential pressure sensor is provided between the second cooling water inlet C2 and the second cooling water outlet D2.

[0010] In this technical solution, the composition and principle of the second cooling circuit are similar to those of the first cooling circuit.

[0011] The present invention is further configured as follows: the circulating liquid outlet circuit includes a first circulating liquid outlet circuit and a second circulating liquid outlet circuit, the liquid inlet end of the first circulating liquid outlet circuit is connected to a three-way solenoid valve, and the liquid inlet end of the second circulating liquid outlet circuit is connected to a second heat exchanger.

[0012] In the technical solution, the first circulating liquid water outlet circuit and the second circulating liquid water outlet circuit can be opened separately or both can be opened.

[0013] The present invention is further configured as follows: the storage circuit includes a water tank, the liquid outlet end of the water tank is connected to the liquid inlet end of the variable frequency water pump, the liquid outlet end of the variable frequency water pump is connected to a three-way ball valve, the three-way ball valve includes a second ball valve port and a third ball valve port, the second ball valve port is connected to the first heat exchanger, and the third ball valve port is respectively connected to the second heat exchanger and the three-way solenoid valve.

[0014] In the technical solution, a large amount of circulating fluid is stored in the water tank of the storage loop, and flows through the three-way ball valve under the drive of the variable frequency water pump.

[0015] The present invention is further configured as follows: the three-way solenoid valve includes a second solenoid valve port connected to the three-way ball valve and a third solenoid valve port connected to the first circulating liquid outlet circuit, and the three-way solenoid valve is also connected to the liquid outlet of the first heat exchanger through the first solenoid valve port.

[0016] In the technical solution, each solenoid valve port of the three-way solenoid valve can be controlled to be opened and closed, thereby achieving adjustment of the circulating fluid circuit.

[0017] The present invention is further configured as follows: the circulating liquid recovery circuit includes a pressure reducing valve, one end of the pressure reducing valve is connected to a solenoid valve, the other end of the solenoid valve is connected to a third one-way valve, and the other end of the third one-way valve is respectively connected to the first circulating liquid outlet B1 and the second circulating liquid outlet B2.

[0018] In the technical scheme, after the compressed gas is input from the gas inlet, the on-off time of the solenoid valve is controlled to recover the circulating liquid. Since the gas cannot pass through the first one-way valve and the second one-way valve, it will pass through the first circulating liquid outlet and the second circulating liquid outlet to recover the circulating liquid in the external pipeline and return it to the water tank through the circulating liquid return port for gas-liquid separation, and the excess gas will be discharged from the pressure relief valve.

[0019] The present invention is further configured as follows: the first circulating liquid outlet circuit includes a first flow meter connected to a three-way solenoid valve, the other end of the first flow meter is connected to a first one-way valve, and the other end of the first one-way valve is connected to a first pressure gauge and a second thermometer in sequence.

[0020] In the present technical solution, the second circulating liquid outlet circuit is similar to the first circulating liquid outlet circuit described above, and can complete the outlet and circulation of the circulating liquid.

[0021] The present invention is further configured such that: the water tank is also connected to a pressure relief valve, and the pressure relief valve discharges excess gas in the water tank.

[0022] In this technical solution, the pressure relief valve can discharge the gas.

[0023] The present invention is further configured to include a chassis, wherein a liquid leakage alarm is arranged at the lowest plane of the chassis.

[0024] In this technical solution, the leaked liquid is guided to the leak alarm through the inclined surface of the chassis, and then an alarm is sounded immediately.

[0025] The present invention can bring the following beneficial effects: The present invention relates to a direct heat exchange chiller device for multiple working conditions, which can increase the maximum refrigeration capacity of the chiller without replacing a heat exchanger with a larger specification, thereby meeting the temperature control requirements of multiple working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall principle of a direct heat exchange chiller device with multiple working conditions in the present application.

[0027] Figure 2 It is a schematic diagram of the first cooling circuit of a multi-operating-condition direct heat exchange chiller device of the present application.

[0028] Figure 3 It is a schematic diagram of the second cooling circuit of a multi-operating-condition direct heat exchange chiller device of the present application.

[0029] Figure 4 It is a schematic diagram of working condition 1 of a direct heat exchange chiller device with multiple working conditions of the present application.

[0030] Figure 5 It is a schematic diagram of operating condition 2 of a multi-operating condition direct heat exchange chiller device of the present application.

[0031] Figure 6 It is a schematic diagram of circulating liquid recovery of a direct heat exchange chiller device with multiple working conditions in the present application.

[0032] Reference numerals 1. Water tank; 2. Frequency conversion water pump; 3. Three-way ball valve; 4. First heat exchanger; 5. First bypass; 6. First ball valve; 7. First differential pressure sensor; 8. First thermometer; 9. Three-way solenoid valve; 10. First flow meter; 11. First check valve; 12. First pressure gauge; 13. Second thermometer; 14. Second heat exchanger; 15. Second ball valve; 16. Second differential pressure sensor; 17. Fourth thermometer; 18. Second flow meter; 19. Second check valve; 20. Second pressure gauge; 21. Second thermometer; 22. Third check valve; 23. Solenoid valve; 24. Pressure reducing valve; 25. Chassis; 26. Liquid leakage alarm; 27. Hand valve; 28. Pressure relief valve; 29. ​​Liquid level switch; 3a, first ball valve port; 3b, second ball valve port; 3c, third ball valve port; 9a, first solenoid valve port; 9b, second solenoid valve port; 9c, third solenoid valve port; A, circulating liquid return port; B1, first circulating liquid outlet; B2, second circulating liquid outlet; C1, first cooling water inlet; C2, second cooling water inlet; D1, first cooling water outlet; D2, second cooling water outlet; E, gas inlet. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific implementation method described herein is only an optimal embodiment of the present invention, which is only used to explain the present invention and does not limit the scope of protection of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] Example 1 This embodiment proposes a multi-condition direct heat exchange chiller device, referring to Figure 1 , which mainly includes a circulating liquid circuit and a cooling circuit. The cooling circuit can cool the circulating liquid circuit so as to refrigerate and cool the external equipment; the cooling circuit mainly includes a first cooling circuit and a second cooling circuit. A first heat exchanger 4 is arranged between the first cooling circuit and the circulating liquid circuit, and a second heat exchanger 14 is arranged between the second cooling circuit and the circulating liquid circuit; under different working conditions, the first heat exchanger 4 and the second heat exchanger 14 are connected in parallel or in series; the circulating liquid circuit includes a storage circuit, a circulating liquid water outlet circuit and a circulating liquid recovery circuit. The storage circuit is connected to the circulating liquid water outlet circuit, and the circulating liquid outlet circuit is also connected to the circulating liquid recovery circuit.

[0035] refer to Figure 2 For the first cooling circuit, it mainly includes a first ball valve 6, a first differential pressure sensor 7 and a first thermometer 8. First, the first cooling water inlet C1 can be connected to external cooling water, generally regular cooling water from the factory.

[0036] The first cooling water inlet C1 is connected to the water inlet end of the first ball valve 6. Meanwhile, a first thermometer 8 is provided on one side of the first cooling water inlet C1. The first thermometer 8 can detect the temperature of the water entering the first cooling circuit through the first cooling water inlet C1.

[0037] The water outlet end of the first ball valve 6 is connected to the water inlet end of the first heat exchanger 4. At the same time, the first ball valve 6 is also connected to the first bypass 5. The water outlet end of the first heat exchanger 4 is connected to the first cooling water outlet D1. A first differential pressure sensor 7 is arranged between the first cooling water inlet C1 and the first cooling water outlet D1. The first differential pressure sensor 7 can read and calculate the real-time flow rate.

[0038] refer to Figure 3 For the second cooling circuit, it mainly includes a second ball valve 15, a second differential pressure sensor 16 and a second thermometer 17. The second cooling water inlet C2 is also connected to external cooling water. Like the first cooling water inlet C1, the external cooling water it connects to is also the regular cooling water from the factory.

[0039] Continue to refer Figure 3 The second cooling water inlet C2 can be connected to the water inlet end of the second ball valve 15. At the same time, a second thermometer 17 is provided on one side of the second cooling water inlet C2. The second thermometer 17 can detect the temperature of the water entering the first cooling circuit through the second cooling water inlet C2.

[0040] The water outlet of the second ball valve 15 is connected to the water inlet of the second heat exchanger 14, and the water outlet of the second heat exchanger 14 can be connected to the second cooling water outlet D2. A second differential pressure sensor 16 is arranged between the second cooling water inlet C2 and the second cooling water D2, and the second differential pressure sensor 16 can read and calculate the real-time flow rate.

[0041] The principles of the first cooling circuit and the second cooling circuit are basically the same, and include the following processes: the first cooling water inlet C1 and the second cooling water inlet C2 are both connected to external cooling water; the data of the first thermometer 8 and the second thermometer 17 are read by the processor, and compared with the target temperature, so as to control the opening of the first ball valve 6 and the second ball valve 15, thereby controlling the flow of cooling water, and then controlling the amount of heat exchange, so as to achieve the purpose of temperature control; wherein, the first differential pressure sensor 7 and the second differential pressure sensor 16 can read and calculate the real-time flow.

[0042] In the present technical solution, both the first ball valve 6 and the second ball valve 15 are electric ball valves, and their openings can be controlled by a processor.

[0043] For the above circulating fluid outlet circuit, refer to Figure 1 It mainly includes a first circulating liquid outlet circuit and a second circulating liquid outlet circuit. The liquid inlet end of the first circulating liquid outlet circuit can be connected to the three-way solenoid valve 9, and the liquid inlet end of the second circulating liquid outlet circuit can be connected to the second heat exchanger 14.

[0044] In the present technical solution, two circulating liquid outlet circuits are provided. Under different working conditions, it is possible to choose to open both circulating liquid outlet circuits or only open the second circulating liquid outlet circuit.

[0045] refer to Figure 1 For the storage circuit, it includes a water tank 1, the liquid outlet end of the water tank 1 can be connected to the liquid inlet end of the variable frequency water pump 2, and the liquid outlet section of the variable frequency water pump 2 is connected to the three-way ball valve 3. In this embodiment, the three-way ball valve 3 is a three-way electric ball valve.

[0046] The three-way ball valve 3 includes a second ball valve port 3b and a third ball valve port 3c. The second ball valve port 3b of the three-way ball valve 3 is connected to the first heat exchanger 4, and the third ball valve port 3c of the three-way ball valve 3 is respectively connected to the second heat exchanger 14 and the three-way solenoid valve 9. In addition, the three-way ball valve 3 also includes a first ball valve port 3a. The first ball valve port 3a of the three-way ball valve 3 can be connected to the liquid outlet of the variable frequency water pump 2.

[0047] For the three-way solenoid valve 9, it includes a first solenoid valve port 9a, a second solenoid valve port 9b and a third solenoid valve port 9c, wherein the first solenoid valve port 9a of the three-way solenoid valve 9 can be connected to the liquid outlet of the first heat exchanger 4; the second solenoid valve port 9b of the three-way solenoid valve 9 can be connected to the three-way ball valve 3, specifically, the second solenoid valve port 9b of the three-way solenoid valve 9 is connected to the third ball valve port 3c of the three-way ball valve 3; the third solenoid valve port 9c of the three-way solenoid valve 9 is connected to the first circulating liquid water outlet circuit, specifically, the third solenoid valve port 9c of the three-way solenoid valve 9 is connected to the first flowmeter 10 of the first circulating liquid water outlet circuit.

[0048] For the circulating liquid outlet circuit, it includes a first circulating liquid outlet circuit and a second circulating liquid outlet circuit. The first circulating liquid outlet circuit includes a first flow meter 10, a first one-way valve 11, a first pressure gauge 12 and a second thermometer 13. The liquid inlet end of the first flow meter 10 can be connected to the three-way solenoid valve 9, and the liquid outlet end of the first flow meter 10 can be connected to the first one-way valve 11. Specifically, the liquid outlet end of the first flow meter 10 is connected to the liquid inlet end of the first one-way valve 11; the liquid outlet end of the first one-way valve 11 can be connected to the first pressure gauge 12 and the second thermometer 13 respectively, and at the same time connected to the first circulating liquid outlet B1.

[0049] For the second circulating liquid outlet circuit, similar to the first circulating liquid outlet circuit, it includes a second flow meter 18, a second one-way valve 19, a second pressure gauge 20 and a second thermometer 21, wherein the liquid inlet end of the second flow meter 18 can be connected to the liquid outlet end of the second heat exchanger 14, and the liquid outlet end of the second flow meter 18 can be connected to the second one-way valve 19. Specifically, the liquid outlet end of the second flow meter 18 is connected to the liquid inlet end of the second one-way valve 19, and the liquid outlet end of the second one-way valve 19 can be connected to the second pressure gauge 20 and the second thermometer 21, and is also connected to the second circulating liquid outlet B2.

[0050] In addition, continue to refer to Figure 1 The water tank 1 is also connected to a pressure relief valve 28, which can discharge excess gas in the water tank 1. A liquid level switch 29 is also provided in the water tank 1.

[0051] Example 2 The present embodiment proposes a multi-operating condition direct heat exchange chiller device, which mainly includes a circulating liquid circuit and a cooling circuit. The cooling circuit can cool the circulating liquid circuit so as to refrigerate and cool external equipment; the cooling circuit mainly includes a first cooling circuit and a second cooling circuit, a first heat exchanger 4 is arranged between the first cooling circuit and the circulating liquid circuit, and a second heat exchanger 14 is arranged between the second cooling circuit and the circulating liquid circuit; under different operating conditions, the first heat exchanger 4 and the second heat exchanger 14 are connected in parallel or in series; the circulating liquid circuit includes a storage circuit, a circulating liquid water outlet circuit and a circulating liquid recovery circuit, the storage circuit is connected to the circulating liquid water outlet circuit, and the circulating liquid outlet circuit is also connected to the circulating liquid recovery circuit.

[0052] refer to Figure 2 For the first cooling circuit, it mainly includes a first ball valve 6, a first differential pressure sensor 7 and a first thermometer 8. First, the first cooling water inlet C1 can be connected to external cooling water, generally regular cooling water from the factory.

[0053] The first cooling water inlet C1 is connected to the water inlet end of the first ball valve 6. Meanwhile, a first thermometer 8 is provided on one side of the first cooling water inlet C1. The first thermometer 8 can detect the temperature of the water entering the first cooling circuit through the first cooling water inlet C1.

[0054] The water outlet end of the first ball valve 6 is connected to the water inlet end of the first heat exchanger 4. At the same time, the first ball valve 6 is also connected to the first bypass 5. The water outlet end of the first heat exchanger 4 is connected to the first cooling water outlet D1. A first differential pressure sensor 7 is arranged between the first cooling water inlet C1 and the first cooling water outlet D1. The first differential pressure sensor 7 can read and calculate the real-time flow rate.

[0055] refer to Figure 3 For the second cooling circuit, it mainly includes a second ball valve 15, a second differential pressure sensor 16 and a second thermometer 17. The second cooling water inlet C2 is also connected to external cooling water. Like the first cooling water inlet C1, the external cooling water it connects to is also the regular cooling water from the factory.

[0056] Continue to refer Figure 3 The second cooling water inlet C2 can be connected to the water inlet end of the second ball valve 15. At the same time, a second thermometer 17 is provided on one side of the second cooling water inlet C2. The second thermometer 17 can detect the temperature of the water entering the first cooling circuit through the second cooling water inlet C2.

[0057] The water outlet of the second ball valve 15 is connected to the water inlet of the second heat exchanger 14, and the water outlet of the second heat exchanger 14 can be connected to the second cooling water outlet D2. A second differential pressure sensor 16 is arranged between the second cooling water inlet C2 and the second cooling water D2, and the second differential pressure sensor 16 can read and calculate the real-time flow rate.

[0058] The principles of the first cooling circuit and the second cooling circuit are basically the same, and include the following processes: the first cooling water inlet C1 and the second cooling water inlet C2 are both connected to external cooling water; the data of the first thermometer 8 and the second thermometer 17 are read by the processor, and compared with the target temperature, so as to control the opening of the first ball valve 6 and the second ball valve 15, thereby controlling the flow of cooling water, and then controlling the amount of heat exchange, so as to achieve the purpose of temperature control; wherein, the first differential pressure sensor 7 and the second differential pressure sensor 16 can read and calculate the real-time flow.

[0059] In the present technical solution, both the first ball valve 6 and the second ball valve 15 are electric ball valves, and their openings can be controlled by a processor.

[0060] For the above circulating fluid outlet circuit, refer to Figure 1 It mainly includes a first circulating liquid outlet circuit and a second circulating liquid outlet circuit. The liquid inlet end of the first circulating liquid outlet circuit can be connected to the three-way solenoid valve 9, and the liquid inlet end of the second circulating liquid outlet circuit can be connected to the second heat exchanger 14.

[0061] In the present technical solution, two circulating liquid outlet circuits are provided. Under different working conditions, it is possible to choose to open both circulating liquid outlet circuits or only open the second circulating liquid outlet circuit.

[0062] refer to Figure 1 For the storage circuit, it includes a water tank 1, the liquid outlet end of the water tank 1 can be connected to the liquid inlet end of the variable frequency water pump 2, and the liquid outlet section of the variable frequency water pump 2 is connected to the three-way ball valve 3. In this embodiment, the three-way ball valve 3 is a three-way electric ball valve.

[0063] The three-way ball valve 3 includes a second ball valve port 3b and a third ball valve port 3c. The second ball valve port 3b of the three-way ball valve 3 is connected to the first heat exchanger 4, and the third ball valve port 3c of the three-way ball valve 3 is respectively connected to the second heat exchanger 14 and the three-way solenoid valve 9. In addition, the three-way ball valve 3 also includes a first ball valve port 3a. The first ball valve port 3a of the three-way ball valve 3 can be connected to the liquid outlet of the variable frequency water pump 2.

[0064] For the three-way solenoid valve 9, it includes a first solenoid valve port 9a, a second solenoid valve port 9b and a third solenoid valve port 9c, wherein the first solenoid valve port 9a of the three-way solenoid valve 9 can be connected to the liquid outlet of the first heat exchanger 4; the second solenoid valve port 9b of the three-way solenoid valve 9 can be connected to the three-way ball valve 3, specifically, the second solenoid valve port 9b of the three-way solenoid valve 9 is connected to the third ball valve port 3c of the three-way ball valve 3; the third solenoid valve port 9c of the three-way solenoid valve 9 is connected to the first circulating liquid water outlet circuit, specifically, the third solenoid valve port 9c of the three-way solenoid valve 9 is connected to the first flowmeter 10 of the first circulating liquid water outlet circuit.

[0065] For the circulating liquid outlet circuit, it includes a first circulating liquid outlet circuit and a second circulating liquid outlet circuit. The first circulating liquid outlet circuit includes a first flow meter 10, a first one-way valve 11, a first pressure gauge 12 and a second thermometer 13. The liquid inlet end of the first flow meter 10 can be connected to the three-way solenoid valve 9, and the liquid outlet end of the first flow meter 10 can be connected to the first one-way valve 11. Specifically, the liquid outlet end of the first flow meter 10 is connected to the liquid inlet end of the first one-way valve 11; the liquid outlet end of the first one-way valve 11 can be connected to the first pressure gauge 12 and the second thermometer 13 respectively, and at the same time connected to the first circulating liquid outlet B1.

[0066] For the second circulating liquid outlet circuit, similar to the first circulating liquid outlet circuit, it includes a second flow meter 18, a second one-way valve 19, a second pressure gauge 20 and a second thermometer 21, wherein the liquid inlet end of the second flow meter 18 can be connected to the liquid outlet end of the second heat exchanger 14, and the liquid outlet end of the second flow meter 18 can be connected to the second one-way valve 19. Specifically, the liquid outlet end of the second flow meter 18 is connected to the liquid inlet end of the second one-way valve 19, and the liquid outlet end of the second one-way valve 19 can be connected to the second pressure gauge 20 and the second thermometer 21, and is also connected to the second circulating liquid outlet B2.

[0067] In addition, continue to refer to Figure 1 The water tank 1 is also connected to a pressure relief valve 28, which can discharge excess gas in the water tank 1.

[0068] The difference from Example 1 is that this embodiment also includes a circulating liquid recovery loop. Figure 1, which includes a pressure reducing valve 24, a solenoid valve 23 and a third one-way valve 22, one end of the pressure reducing valve 24 is connected to the solenoid valve 23, the other end of the pressure reducing valve 24 is connected to the gas inlet E, the end of the solenoid valve 23 away from the pressure reducing valve 24 is connected to the third one-way valve 22, and the other end of the third one-way valve 22 is respectively connected to the first circulating liquid outlet B1 and the second circulating liquid outlet B2; specifically, the third one-way valve 22 is connected to the liquid outlet end of the first one-way valve 11 of the first circulating liquid outlet circuit, and at the same time, the third one-way valve 22 is connected to the liquid outlet end of the second one-way valve 19 of the second circulating liquid outlet circuit.

[0069] refer to Figure 6 After the compressed gas is input from the gas inlet E, the pressure is adjusted to 0.2Mpa through the pressure reducing valve 24, and the on-off time of the solenoid valve 23 is controlled to recover the circulating liquid. Since the gas cannot pass through the first one-way valve 11 and the second one-way valve 19, it will pass through the first circulating liquid outlet B1 and the second circulating liquid outlet B2 to recover the circulating liquid in the external pipeline and return it to the water tank 1 through the circulating liquid return port A. After that, the gas and liquid are separated inside, and the excess gas is discharged from the pressure relief 28.

[0070] This embodiment further includes a chassis 25, and a corresponding liquid leakage alarm 26 is arranged at the lowest plane of the chassis 25. The leaked liquid is guided to the liquid leakage alarm 26 through the inclined surface of the chassis, thereby triggering the liquid leakage alarm immediately.

[0071] The specific working process of this embodiment of a multi-operating condition direct heat exchange chiller device includes the following operating conditions.

[0072] refer to Figure 1 and Figure 4 Working condition one: control the three-way ball valve 3 so that the second ball valve port 3b and the second ball valve port 3c of the three-way ball valve 3 are opened and are at different openings. In the case of circulating liquid diversion, control the three-way solenoid valve 9 so that the first solenoid valve port 9a and the third solenoid valve port 9c of the three-way solenoid valve 9 are opened, and the second solenoid valve 9b of the three-way solenoid valve 9 is closed. At this time, the first heat exchanger 4 and the second heat exchanger 14 are connected in parallel with each other, and the circulating liquid can output two target temperatures from the first circulating liquid outlet B1 and the second circulating liquid outlet B2 at the same time, and then return to the water tank 1 from the circulating liquid return port A.

[0073] refer to Figure 1 and Figure 5Working condition two: control the three-way ball valve 3 so that the second ball valve port 3b of the three-way ball valve 3 is opened, and the third ball valve port 3c of the three-way ball valve 3 is closed. At the same time, control the three-way solenoid valve 9 so that the first solenoid valve port 9a and the second solenoid valve port 9b of the three-way ball valve 9 are opened, and the third solenoid valve port 9c of the three-way ball valve 9 is closed, so that the first heat exchanger 4 and the second heat exchanger 14 are connected in series to increase the maximum output cooling capacity, and the circulating liquid is output from the second circulating liquid outlet B2 and returns to the water tank 1 from the circulating liquid return port A.

[0074] This embodiment can bring the following technical effects: 1. Solve the problem of temperature control lag, and further, output multiple target temperatures; 2. The maximum cooling capacity of the chiller can be increased by replacing a larger heat exchanger without replacing it, meeting the temperature control requirements of various working conditions; 3. The leakage alarm is located at the lowest plane of the chassis. The leakage is diverted to the alarm through the inclined surface of the chassis, and the leakage alarm is triggered immediately to ensure timely alarm.

[0075] This embodiment merely illustrates that the heat exchanger includes the first heat exchanger 4 and the second heat exchanger 14. In actual application, the number and type of the heat exchangers can be changed according to actual needs. Similarly, for the control valves in this embodiment, such as the three-way solenoid valve 9 and the three-way ball valve 3, the number and type can also be changed according to actual conditions, which is also within the protection scope of this application.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that any modification or equivalent replacement of the technical solutions of the present invention does not depart from the spirit and scope of the technical solutions of the present invention and should be included in the scope of the claims of the present invention.

Claims

1. A multi-operating-mode direct heat exchange chiller device, characterized in that: The invention comprises a circulating liquid circuit and a cooling circuit for cooling the circulating liquid circuit, the cooling circuit comprising a first cooling circuit and a second cooling circuit, a first heat exchanger (4) being arranged between the first cooling circuit and the circulating liquid circuit, a second heat exchanger (14) being arranged between the second cooling circuit and the circulating liquid circuit, the first heat exchanger (4) and the second heat exchanger (14) being connected in parallel or in series; the circulating liquid circuit comprising a storage circuit, the storage circuit being connected to a circulating liquid outlet circuit, and the circulating liquid outlet circuit being further connected to a circulating liquid recovery circuit.

2. A multi-operating-mode direct heat exchange chiller device according to claim 1, characterized in that: The first cooling circuit comprises a first ball valve (6), a water inlet end of the first ball valve (6) being connected to a first thermometer (8) and a first cooling water inlet C1 respectively, a water outlet end of the first ball valve (6) being connected to a water inlet end of a first heat exchanger (4), a water outlet end of the first heat exchanger (4) being connected to a first cooling water outlet D1, and a first differential pressure sensor (7) being provided between the first cooling water inlet C1 and the first cooling water outlet D1.

3. A multi-operating-mode direct heat exchange chiller device according to claim 1, characterized in that: The second cooling circuit comprises a second ball valve (15), the water inlet end of the second ball valve (15) being connected to a second thermometer (17) and a second cooling water inlet C2 respectively, the water outlet end of the second ball valve (15) being connected to a water inlet end of a second heat exchanger (14), the water outlet end of the second heat exchanger (14) being connected to a second cooling water outlet D2, and a second differential pressure sensor (16) being provided between the second cooling water inlet C2 and the second cooling water outlet D2.

4. A multi-operating-mode direct heat exchange chiller device according to claim 1, characterized in that: The circulating liquid outlet circuit comprises a first circulating liquid outlet circuit and a second circulating liquid outlet circuit, the liquid inlet end of the first circulating liquid outlet circuit being connected to a three-way solenoid valve (9), and the liquid inlet end of the second circulating liquid outlet circuit being connected to a second heat exchanger (14).

5. A multi-operating-mode direct heat exchange chiller device according to claim 1, characterized in that: The storage circuit comprises a water tank (1), the liquid outlet end of the water tank (1) is connected to the liquid inlet end of a variable frequency water pump (2), the liquid outlet end of the variable frequency water pump (2) is connected to a three-way ball valve (3), the three-way ball valve (3) comprises a second ball valve port (3b) and a third ball valve port (3c), the second ball valve port (3b) is connected to a first heat exchanger (4), and the third ball valve port (3c) is respectively connected to a second heat exchanger (14) and a three-way solenoid valve (9).

6. A multi-operating-mode direct heat exchange chiller device according to claim 4, characterized in that: The three-way solenoid valve (9) comprises a second solenoid valve port (9b) connected to the three-way ball valve (3) and a third solenoid valve port (9c) connected to the first circulating liquid outlet circuit; the three-way solenoid valve (9) is also connected to the liquid outlet of the first heat exchanger (4) via the first solenoid valve port (9a).

7. A multi-mode direct heat exchange chiller device according to claim 1, characterized in that: The circulating liquid recovery circuit comprises a pressure reducing valve (24), one end of the pressure reducing valve (24) is connected to a solenoid valve (23), the other end of the solenoid valve (23) is connected to a third one-way valve (22), and the other end of the third one-way valve (22) is respectively connected to a first circulating liquid outlet B1 and a second circulating liquid outlet B2.

8. A multi-operating-mode direct heat exchange chiller device according to claim 4, characterized in that: The first circulating liquid outlet circuit comprises a first flow meter (10) connected to a three-way electromagnetic valve (9); the other end of the first flow meter (10) is connected to a first one-way valve (11); the other end of the first one-way valve (11) is connected in sequence to a first pressure gauge (12) and a second thermometer (13).

9. The multi-operating-mode direct heat exchange chiller device according to claim 5, characterized in that: The water tank (1) is also connected to a pressure relief valve (28), and the pressure relief valve (28) discharges excess gas in the water tank (1).

10. A multi-mode direct heat exchange chiller device according to any one of claims 1 to 9, characterized in that: It also comprises a bottom plate (25), wherein a liquid leakage alarm (26) is provided at the lowest plane of the bottom plate (25).

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