High-precision temperature control system adopting two-stage semiconductor refrigeration

Abstract

The utility model relates to the technical field of semiconductor refrigeration, in particular to a high-precision temperature control system adopting two-stage semiconductor refrigeration. The water supply module is used for providing a refrigeration water source; the refrigerating module is used for refrigerating water in the water supply module; the first voltage regulator is used for regulating the voltage at the two ends of the first refrigeration module, controlling the refrigerating capacity of the first refrigeration module and preliminarily controlling the temperature of chilled water, the second voltage regulator is used for regulating the voltage at the two ends of the second refrigeration module and controlling the refrigerating capacity of the second refrigeration module, and the temperature of the chilled water is accurately controlled through the second refrigeration module. The semiconductor refrigeration system is adopted, control is convenient, precision is high, the outlet water temperature precision of the two-stage semiconductor refrigeration system can be controlled within 10 mk, a high-precision temperature control system provides more accurate chilled water supply water temperature for special equipment, and the error between the water supply temperature and the temperature set by a user is reduced to a certain degree.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor refrigeration technology, specifically a high-precision temperature control system employing two-stage semiconductor refrigeration. Background Technology

[0002] Special equipment refers to eight categories of equipment that involve life safety and are highly dangerous, including boilers, pressure vessels (including gas cylinders), pressure pipelines, elevators, lifting machinery, passenger ropeways, large amusement facilities, and special motor vehicles for use in factories and plants. With the continuous development of society, people have increasingly higher requirements for the temperature control accuracy of special equipment. The existing temperature control accuracy of special equipment can no longer meet the needs of users. Therefore, it is urgent to improve the temperature control accuracy of special equipment to provide users with a better user experience. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a high-precision temperature control system employing two-stage semiconductor refrigeration, which solves the problem that the temperature control accuracy of existing special equipment does not meet user needs. It has the advantages of stable cooling capacity, convenient control, and high precision.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A high-precision temperature control system employing two-stage semiconductor refrigeration includes a water supply module for providing a chilled water source; a refrigeration module for cooling the water in the water supply module; and a cooling module for maintaining a constant hot-end temperature of the refrigeration module. The refrigeration module includes a first semiconductor refrigeration block, a chilled water pipe, and a cooling water pipe. The first semiconductor refrigeration block is connected to a second semiconductor refrigeration block via the chilled water pipe. The first semiconductor refrigeration block includes a first refrigeration module with first hot ends at both ends. The second semiconductor refrigeration block includes a second refrigeration module with second hot ends at both ends. The first refrigeration module is connected to the second refrigeration module via the chilled water pipe. The first hot ends at both ends of the first refrigeration module and the second hot ends at both ends of the second refrigeration module are connected via cooling water pipes. A first voltage regulator and a second voltage regulator are respectively provided on the first and second refrigeration modules.

[0006] Furthermore, the cooling module includes a cooling water three-way valve installed at the inlet of the cooling water pipe. One side of the cooling water three-way valve is connected in sequence to a cooling water pump, a cooling water inlet thermometer, and a cooling water flow meter. The other side of the cooling water flow meter flows through the cooling water pipe from one of the second hot ends at both ends of the second refrigeration module and the first hot ends 212 at both ends of the first refrigeration module, and then flows into the other end for circulation before flowing out. Finally, the outlet is connected to a cooling water outlet thermometer through the cooling water pipe. The other side of the cooling water three-way valve is connected to the outlet of the cooling water pipe.

[0007] Furthermore, the cooling water inlet thermometer is connected to the cooling water three-way valve for opening adjustment.

[0008] Furthermore, the water supply module includes a return water thermometer installed at the inlet of the chilled water pipe. The other side of the return water thermometer is connected in sequence to a water tank and a chilled water pump via the chilled water pipe. The outlet of the chilled water pump is connected to the first refrigeration module via the chilled water pipe. A first chilled water thermometer is connected between the first refrigeration module and the second refrigeration module via the chilled water pipe. The outlet of the second refrigeration module is connected in sequence to a chilled water flow meter and a second chilled water thermometer via the chilled water pipe.

[0009] Furthermore, the first voltage regulator is connected to the first chilled water thermometer.

[0010] Furthermore, the second voltage regulator is connected to the second chilled water thermometer.

[0011] Furthermore, a pump frequency converter is connected between the chilled water pump and the chilled water flow meter.

[0012] Compared with the prior art, this utility model provides a high-precision temperature control system using two-stage semiconductor refrigeration, which has the following advantages:

[0013] 1. This utility model regulates the voltage across the first refrigeration module using a first voltage regulator to control the cooling capacity of the first refrigeration module and initially control the temperature of the chilled water. It then regulates the voltage across the second refrigeration module using a second voltage regulator to control the cooling capacity of the second refrigeration module and precisely control the temperature of the chilled water using the second refrigeration module. The use of a semiconductor refrigeration system makes control convenient and highly accurate. The dual-stage semiconductor refrigeration system can control the outlet water temperature accuracy to within 10mK. This high-precision temperature control system provides more accurate chilled water supply temperature for special equipment, reducing the error between the supply water temperature and the user-set temperature to a certain extent.

[0014] 2. This utility model uses cooling water to flow into and circulate from one of the second hot ends of the second refrigeration module and the first hot ends of the first refrigeration module, then into the other end and out. The temperature is then detected by a cooling water outlet thermometer before finally flowing into the cooling water outlet. This method stabilizes the temperature of the hot end of the semiconductor refrigeration chip to a certain extent, reduces the fluctuation of the chilled water supply temperature caused by changes in the hot end temperature, and ensures stable cooling capacity by adding temperature and flow control to the cooling water flowing into the heat dissipation end of the refrigeration equipment. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0016] Figure 1 This is a block diagram illustrating the principle of a high-precision temperature control system employing two-stage semiconductor refrigeration according to this utility model.

[0017] Figure 2 This is a schematic diagram showing the connection of the water supply module, refrigeration module and cooling module of this utility model;

[0018] Figure 3 This is a schematic diagram of the first and second semiconductor cooling blocks of this utility model.

[0019] In the picture:

[0020] 1. Water supply module; 11. Return water thermometer; 12. Water tank; 13. Chilled water pump; 14. First chilled water thermometer; 15. Chilled water flow meter; 16. Second chilled water thermometer; 17. Pump frequency converter;

[0021] 2. Refrigeration module;

[0022] 21. First semiconductor cooling block; 211. First cooling module; 212. First hot end; 213. First voltage regulator;

[0023] 22. Chilled water pipes; 23. Cooling water pipes;

[0024] 24. Second semiconductor cooling block; 241. Second cooling module; 242. Second hot end; 243. Second voltage regulator;

[0025] 3. Cooling module; 31. Cooling water three-way valve; 32. Cooling water pump; 33. Cooling water inlet thermometer; 34. Cooling water flow meter; 35. Cooling water outlet thermometer. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Figures 1-3One embodiment of this utility model: A high-precision temperature control system employing two-stage semiconductor refrigeration includes a water supply module 1 for providing a chilled water source; a refrigeration module 2 for cooling the water in the water supply module 1; and a cooling module 3 for maintaining a constant hot-end temperature of the refrigeration module 2. The refrigeration module 2 includes a first semiconductor refrigeration block 21, a chilled water pipe 22, and a cooling water pipe 23. The first semiconductor refrigeration block 21 is connected to a second semiconductor refrigeration block 24 via the chilled water pipe 22. The first semiconductor refrigeration block 21 provides initial control of the chilled water temperature, while the second semiconductor refrigeration block 24 provides precise control of the chilled water temperature. The system includes a first cooling module 211, which initially cools the water. Both ends of the first cooling module 211 have first hot ends 212, which maintain the temperature of the hot ends of the first cooling module 211. The second semiconductor cooling block 24 includes a second cooling module 241, which further cools the flowing chilled water. Both ends of the second cooling module 241 have second hot ends 242, which maintain the temperature of the hot ends of the second cooling module 241. The first cooling module 211 is connected to the second cooling module 241 via a chilled water pipe 22, achieving two-stage semiconductor cooling. The outlet water temperature is controlled within 10 mK. The first hot end 212 at both ends of the first refrigeration module 211 and the second hot end 242 at both ends of the second refrigeration module 241 are connected by cooling water pipes 23. Chilled water flows in through the inlet of one of the first hot ends 212 at both ends of the first refrigeration module 211 and one of the second hot ends 242 at both ends of the second refrigeration module 241, flows out through the outlet, and then flows into the inlet of the other first hot end 212 and the other hot end 242, and finally flows out through the outlet. A first voltage regulator 213 and a second voltage regulator 243 are respectively provided on the first refrigeration module 211 and the second refrigeration module 241. The voltage across the first refrigeration module 211 is adjusted by the first voltage regulator 213 to control the cooling capacity of the first refrigeration module 211 and initially control the temperature of the chilled water. The voltage across the second refrigeration module 241 is adjusted by the second voltage regulator 243 to control the cooling capacity of the second refrigeration module 241 and precisely control the temperature of the chilled water. The semiconductor refrigeration system is easy to control and has high precision. The dual-stage semiconductor refrigeration system can control the outlet water temperature to within 10mK. The high-precision temperature control system provides more accurate chilled water supply temperature for special equipment and reduces the error between the supply water temperature and the user-set temperature to a certain extent.

[0028] Cooling module 3 includes a cooling water three-way valve 31 installed at the inlet of cooling water pipe 23. The cooling water three-way valve 31 controls the temperature of the cooling water entering the hot end of the semiconductor refrigeration block. One side of the cooling water three-way valve 31 is sequentially connected to a cooling water pump 32, a cooling water inlet thermometer 33, and a cooling water flow meter 34. The cooling water inlet thermometer 33 detects the cooling water inlet temperature, and the cooling water flow meter 34 detects the cooling water flow rate. The other side of the cooling water flow meter 34 is connected to the cooling water pipe 23, where water flows into and out of one of the two hot ends 242 of the second refrigeration module 241 and the first hot ends 212 of the first refrigeration module 211, circulating from one end to the other end. The final outlet is connected to a cooling water outlet thermometer 35 via the cooling water pipe 23, which detects the cooling water outlet temperature. The other side of the cooling water three-way valve 31 is connected to the cooling water pipe 23. The outlet is connected, and the cooling water inlet thermometer 33 is connected to the cooling water three-way valve 31. The opening of the three-way valve is adjusted by controlling the opening of the cooling water three-way valve 31 to regulate the main and auxiliary water flow and control the cooling water temperature at the hot end of the semiconductor refrigeration block. The cooling water flows from the inlet through the cooling water three-way valve 31, the cooling water pump 32, the cooling water inlet thermometer 33, and the cooling water flow meter 34 in sequence. Then, it flows into the circulation from one end of the second hot end 242 at both ends of the second refrigeration module 241 and the first hot end 212 at both ends of the first refrigeration module 211, and then flows into the other end for circulation before flowing out. The temperature is then detected by the cooling water outlet thermometer 35, and finally flows into the cooling water outlet. To a certain extent, the temperature of the hot end of the semiconductor refrigeration chip is kept constant, and the fluctuation of the chilled water supply temperature caused by the change of the hot end temperature is reduced. By adding temperature and flow control to the cooling water flowing into the heat dissipation end of the refrigeration equipment, the cooling capacity is ensured to be stable.

[0029] The water supply module 1 includes a return water thermometer 11 installed at the inlet of the chilled water pipe 22. The return water thermometer 11 detects the water temperature at the inlet of the chilled water pipe 22. The other side of the return water thermometer 11 is connected to a water tank 12 and a chilled water pump 13 via the chilled water pipe 22. The water tank 12 stores the return cooling water. The outlet of the chilled water pump 13 is connected to the first refrigeration module 211 via the chilled water pipe 22. A first chilled water thermometer 14 is connected between the first refrigeration module 211 and the second refrigeration module 241 via the chilled water pipe 22. The first chilled water thermometer 14 detects the outlet water temperature of the first refrigeration module 211. The outlet of the second refrigeration module 241 is connected to a chilled water flow meter 15 and a second chilled water thermometer 16 via the chilled water pipe 22. The chilled water flow meter 15 detects the chilled water flow rate, and the second chilled water thermometer 16 detects the outlet water temperature of the second refrigeration module 241. The first electric... The voltage regulator 213 is connected to the first chilled water thermometer 14. The voltage regulator 213 adjusts the voltage across the first refrigeration module 211 to control the cooling capacity of the first refrigeration module 211, thus initially controlling the temperature of the chilled water. The temperature is detected by the first chilled water thermometer 14, with a detection accuracy within 100 mK, thus initially controlling the water temperature change within 100 mK. The second voltage regulator 243 is connected to the second chilled water thermometer 16. The voltage regulator 243 adjusts the voltage across the second refrigeration module 241 to control the cooling capacity of the second refrigeration module 241, thus precisely controlling the final supply temperature of the chilled water. The temperature is detected by the second chilled water thermometer 16, with a detection accuracy within 10 mK, thus controlling the water temperature change within 10 mK. A pump frequency converter 17 is connected between the chilled water pump 13 and the chilled water flow meter 15. The water flow rate is adjusted by controlling the motor frequency of the chilled water pump 13 through the pump frequency converter 17.

[0030] The specific implementation process of the high-precision temperature control system using two-stage semiconductor cooling proposed in this embodiment, which addresses the problem that the temperature control accuracy of existing special equipment does not meet user requirements, is as follows:

[0031] The chilled water return water enters the water tank 12 after passing through the return water thermometer 11. The water or refrigerant inside the water tank 12 is pressurized by the chilled water pump 13 and then enters the first refrigeration module 211. The voltage across the first refrigeration module 211 is adjusted by the first voltage regulator 213 to control the cooling capacity of the first refrigeration module 211, thus initially controlling the chilled water temperature. The outlet water temperature of the first refrigeration module 211 is detected by the first chilled water thermometer 14, with a detection accuracy within 100 mK, thus initially controlling the water temperature. The temperature change is within 100mK. The water temperature is then precisely controlled by the second cooling module 241. The voltage across the second cooling module 241 is adjusted by the second voltage regulator 243 to control the cooling capacity of the second cooling module 241. The temperature of the chilled water is precisely controlled by the second cooling module 241. The water temperature at the outlet of the second cooling module 241 is detected by the second chilled water thermometer 16, with a detection accuracy of within 10mK. The water temperature change is controlled within 10mK. After the water temperature is controlled at the required temperature, it is delivered to the user side.

[0032] To maintain a constant temperature at the hot end of the semiconductor refrigeration chip and reduce temperature fluctuations in the chilled water supply caused by changes in the hot end temperature, cooling water flows through cooling water pipe 23, passing through a cooling water three-way valve 31 that regulates the cooling water temperature at the second hot end 242 and the first hot end 212, and a cooling water pump 32. After the temperature is detected by cooling water inlet thermometer 33, the cooling water flow rate is detected by cooling water flow meter 34. Cooling water flows in from one end of the second hot end 242 at both ends of the second refrigeration module 241 and the first hot end 212 at both ends of the first refrigeration module 211, and flows out from the other end. After passing through the cooling water outlets of the first hot end 212 and the second hot end 242, the cooling water temperature is detected by cooling water outlet thermometer 35, and finally flows into the cooling water outlet.

[0033] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-precision temperature control system employing two-stage semiconductor refrigeration, comprising a water supply module (1) for providing a source of cooled water; a refrigeration module (2) for cooling the water in the water supply module (1); and a cooling module (3) for maintaining a constant temperature at the hot end of the refrigeration module (2); characterized in that: The refrigeration module (2) includes a first semiconductor refrigeration block (21), a chilled water pipe (22) and a cooling water pipe (23), wherein the first semiconductor refrigeration block (21) is connected to a second semiconductor refrigeration block (24) through the chilled water pipe (22); The first semiconductor cooling block (21) includes a first cooling module (211), and a first hot end (212) is provided at both ends of the first cooling module (211). The second semiconductor cooling block (24) includes a second cooling module (241), and a second hot end (242) is provided at both ends of the second cooling module (241). The first cooling module (211) is connected to the second cooling module (241) through a chilled water pipe (22). The first hot end (212) at both ends of the first cooling module (211) and the second hot end (242) at both ends of the second cooling module (241) are connected through a cooling water pipe (23). A first voltage regulator (213) and a second voltage regulator (243) are respectively provided on the first cooling module (211) and the second cooling module (241).

2. The high-precision temperature control system employing two-stage semiconductor cooling according to claim 1, characterized in that: The cooling module (3) includes a cooling water three-way valve (31) installed at the inlet of the cooling water pipe (23). A cooling water pump (32), a cooling water inlet thermometer (33), and a cooling water flow meter (34) are connected in sequence on one side of the cooling water three-way valve (31). The other side of the cooling water flow meter (34) flows through the cooling water pipe (23) from one end of the second hot end (242) at both ends of the second refrigeration module (241) and the first hot end (212) at both ends of the first refrigeration module (211) into the circulation, then into the other end into the circulation, and finally out. The outlet is connected to a cooling water outlet thermometer (35) through the cooling water pipe (23). The other side of the cooling water three-way valve (31) is connected to the outlet of the cooling water pipe (23).

3. A high-precision temperature control system employing two-stage semiconductor cooling according to claim 2, characterized in that: The cooling water inlet thermometer (33) and the cooling water three-way valve (31) are connected by a three-way valve opening adjustment.

4. A high-precision temperature control system employing two-stage semiconductor cooling according to claim 1, characterized in that: The water supply module (1) includes a return water thermometer (11) installed at the inlet of the chilled water pipe (22). The other side of the return water thermometer (11) is connected to a water tank (12) and a chilled water pump (13) in sequence through the chilled water pipe (22). The outlet of the chilled water pump (13) is connected to the first refrigeration module (211) through the chilled water pipe (22). The first refrigeration module (211) and the second refrigeration module (241) are connected by a first chilled water thermometer (14) through the chilled water pipe (22). The outlet of the second refrigeration module (241) is connected by a chilled water flow meter (15) and a second chilled water thermometer (16) in sequence through the chilled water pipe (22).

5. A high-precision temperature control system employing two-stage semiconductor cooling according to claim 4, characterized in that: The first voltage regulator (213) is connected to the first chilled water thermometer (14).

6. A high-precision temperature control system employing two-stage semiconductor cooling according to claim 4, characterized in that: The second voltage regulator (243) is connected to the second chilled water thermometer (16).

7. A high-precision temperature control system employing two-stage semiconductor cooling according to claim 4, characterized in that: A pump frequency converter (17) is connected between the chilled water pump (13) and the chilled water flow meter (15).

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