CN116263278A - Semiconductor TEC and compressor combined water chiller system - Google Patents

Semiconductor TEC and compressor combined water chiller system Download PDF

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Publication number
CN116263278A
CN116263278A CN202211532302.4A CN202211532302A CN116263278A CN 116263278 A CN116263278 A CN 116263278A CN 202211532302 A CN202211532302 A CN 202211532302A CN 116263278 A CN116263278 A CN 116263278A
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China
Prior art keywords
refrigeration
temperature
water
tec
compressor
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CN202211532302.4A
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Chinese (zh)
Inventor
伊良俊
阮炜
王桥刚
金重玄
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Zhejiang Forerunner Thermoelectric Technology Co ltd
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Zhejiang Forerunner Thermoelectric Technology Co ltd
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Priority to CN202211532302.4A priority Critical patent/CN116263278A/en
Publication of CN116263278A publication Critical patent/CN116263278A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B21/00—Machines, plants or systems, using electric or magnetic effects
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
    • F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/40—Fluid line arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The invention discloses a semiconductor TEC and compressor combined water chiller system, which comprises a semiconductor TEC component and a second heat exchanger; the semiconductor TEC component comprises a TEC refrigerating sheet, wherein one surface of the TEC refrigerating sheet is provided with a first heat conducting plate, and the other surface of the TEC refrigerating sheet is provided with a second heat conducting plate; the refrigerant passage of the second heat exchanger is used as a first refrigeration branch to be connected into the refrigeration cycle main passage, and the first heat conducting plate is connected in series with the first electromagnetic valve to be used as a second refrigeration branch to be connected into the refrigeration cycle main passage; the waterway passage of the second heat exchanger and the second heat conducting plate are respectively connected to a waterway circulation system for refrigeration; the outlet of the waterway passage is provided with a first water temperature sensor, and the outlet of the second heat-conducting plate is provided with a second water temperature sensor. According to the invention, a two-stage refrigeration mode combining compressor refrigeration and semiconductor TEC refrigeration sheets is adopted, different refrigeration modes are selected according to different cold water preparation temperatures, the cooling speed is high, and the refrigeration efficiency is high; meanwhile, a defrosting device is not required to be additionally added for defrosting.

Description

Semiconductor TEC and compressor combined water chiller system
Technical Field
The invention relates to the technical field of water coolers, in particular to a semiconductor TEC and compressor combined water cooler system.
Background
The industrial water chiller is widely applied to the fields of semiconductors, chemical industry, electronics, pharmacy, food processing and other industrial freezing processes requiring chilled water, most of water chiller on the market at present work in a single compressor refrigeration mode, when the temperature span of the cold water required to be prepared is relatively large, especially when the required cold water temperature is relatively low, the actual refrigerating capacity of the internal compressor is small, the power consumption is high, the cooling speed is low, the refrigerating efficiency is low and the electric power resource is wasted; and when preparing low-temperature cold water, the refrigerating system needs to be defrosted at fixed time, and a corresponding defrosting device is additionally arranged in the defrosting process.
The 'a water chiller' disclosed in Chinese patent literature has a publication number of CN216080455U and a publication date of 2022-03-18, and comprises: the heat exchanger comprises a shell, a heat exchanger, a compressor, a condenser, a throttling element and a connecting pipeline, wherein a first heat exchange flow path and a second heat exchange flow path are formed in the heat exchanger; the first heat exchange flow path, the compressor, the condenser and the throttling element are sequentially connected end to end through connecting pipelines to form a closed-loop refrigerant flow path; the second heat exchange flow path is connected with an external cooling pipeline. The technology adopts the principle of compression refrigeration to cool the cooling liquid flowing in from an external cooling pipeline, and the compressor has reliable structure and long service life. However, the technology still adopts a single compressor for refrigeration, and when the temperature of cold water to be prepared is low, the actual refrigeration capacity of the compressor is small, the temperature reduction is slow and the power consumption is high; and still the defrosting device is required to be arranged for defrosting treatment.
Disclosure of Invention
The invention provides a semiconductor TEC and compressor combined cold water machine system, which aims to solve the problems that in the prior art, a cold water machine set works in a single compressor refrigeration mode, when the temperature of cold water to be prepared is low, the refrigerating capacity of the compressor is small, the cooling is slow, and the refrigerating efficiency is low; meanwhile, a defrosting device is not required to be additionally added for defrosting.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a semiconductor TEC and compressor combined water chiller system comprises a semiconductor TEC component and a second heat exchanger; the semiconductor TEC component comprises a TEC refrigerating sheet, wherein one surface of the TEC refrigerating sheet is provided with a first heat conducting plate, and the other surface of the TEC refrigerating sheet is provided with a second heat conducting plate; the refrigerant passage of the second heat exchanger is used as a first refrigeration branch to be connected into the refrigeration cycle main passage, and the first heat-conducting plate is connected in series with the first electromagnetic valve to be used as a second refrigeration branch to be connected into the refrigeration cycle main passage; the waterway passage of the second heat exchanger and the second heat conducting plate are respectively connected into a waterway circulation system for refrigeration.
The invention adopts a two-stage refrigeration mode formed by combining the semiconductor TEC refrigeration piece and the compressor refrigeration, has high temperature control precision and high temperature stability, and can overcome the defect of low cooling efficiency when the compressor prepares cold water with lower temperature by the semiconductor TEC refrigeration piece; the water chiller system comprises two sets of circulating systems, wherein the first set is a refrigerating circulating system: the system comprises a refrigeration cycle main circuit, a first refrigeration branch circuit and a second refrigeration branch circuit, wherein all parts in the refrigeration cycle system are communicated through copper pipe welding, and a circulating medium in the refrigeration cycle system is an environment-friendly refrigerant; the second set is a waterway circulation system, all parts in the waterway circulation system are connected through water pipes, a circulation medium of the waterway circulation system is a low-temperature-resistant water solution, and the low-temperature-resistant degree is determined according to the lowest refrigeration temperature of the water chiller; meanwhile, the defrosting process can be completed only by forward and reverse conduction of the current of the TEC refrigerating sheet, and an additional defrosting device is not needed.
Preferably, the refrigeration cycle main path comprises a compressor, an outlet of the compressor is connected with a b port of the four-way reversing valve, and an inlet of the compressor is connected with a d port of the four-way reversing valve; the port a of the four-way reversing valve is connected with one end of the electronic expansion valve through a first heat exchange component; the other end of the electronic expansion valve is respectively connected with one end of the refrigerant passage and the first electromagnetic valve, and the c port of the four-way reversing valve is respectively connected with the other end of the refrigerant passage and the first heat conducting plate.
The first heat exchange component comprises a first heat exchanger and a fan, the cold water machine further comprises a control module, the conduction direction of the four-way reversing valve and the current direction of the TEC refrigerating sheet can be controlled to determine whether the cold water machine is used for refrigerating water or heating water, and the specific opening degree of the electronic expansion valve can be controlled according to the detection data of the first water temperature sensor to control the dryness of the throttled refrigerant, so that the heat exchange efficiency of the second heat exchanger and the first heat conducting plate is controlled.
Preferably, the waterway circulation system comprises a water tank, wherein an outlet of the water tank is connected with an inlet of the waterway passage through a water pump; the outlet of the waterway passage is connected with one end of the load through a third electromagnetic valve; the outlet of the waterway passage is also connected with the inlet of the second heat-conducting plate through a second electromagnetic valve, and the outlet of the second heat-conducting plate is connected with one end of the load through a fourth electromagnetic valve; the other end of the load is connected with the inlet of the water tank; the outlet of the waterway passage is provided with a first water temperature sensor, and the outlet of the second heat-conducting plate is provided with a second water temperature sensor.
The load is a refrigerating or heating place in the waterway circulation system, and when the refrigerating is needed, the refrigerated cold water flows through the heat source load to cool and refrigerate, and then returns to the water tank to carry out waterway circulation again; when heating is needed, the heated hot water flows through a cold source load to be heated and then returns to the water tank to be recycled in the waterway; the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve are closed and opened to control the water flow direction of the waterway circulation system; the opening and closing of the electromagnetic valve can be controlled by the control module according to the temperature of water which is refrigerated or heated as required.
Preferably, the outlet of the water pump is also communicated with one end of a fifth electromagnetic valve, and the other end of the fifth electromagnetic valve is connected between the outlet of the waterway and the first water temperature sensor.
According to the invention, the first water temperature sensor is used for detecting the temperature of water flowing out of the waterway passage, the second water temperature sensor is used for detecting the temperature of water flowing out of the second heat conducting plate, and the opening degree of the electronic expansion valve and the current flowing through the TEC refrigerating plate can be regulated by the control module according to the temperature value detected by the water temperature sensor so as to control the accurate temperature of the final water making; the connected fifth electromagnetic valve can enable circulating water in the waterway circulating system to directly circulate between the water tank and the second heat conducting plate.
Preferably, when cold water with the temperature range of [ tb, tc ] is prepared, the refrigeration cycle main path and the first refrigeration branch path are communicated, the refrigerant in the refrigerant path absorbs heat, the second electromagnetic valve and the fourth electromagnetic valve are closed, and the third electromagnetic valve is opened; tb is the economic cooling temperature of the compressor, and tc is the cold water upper limit temperature.
The economic refrigeration temperature of the compressor is only balanced with the refrigeration capacity and the energy consumption of the compressor at a certain subzero temperature, and when the temperature of the refrigeration water is required to be lower than the temperature, the energy consumption of the compressor is increased, but the refrigeration efficiency is reduced, and at the moment, the defect of refrigeration of the compressor can be overcome by refrigerating by the TEC refrigeration piece; the upper limit temperature of the cold water is determined according to the actual ambient temperature, and 25 ℃ is usually selected; when preparing higher-temperature cold water, only refrigeration is needed by the compressor, and the waterway circulation system only flows through the second heat exchanger.
Preferably, when cold water with the temperature range of [ ta, tb ] is prepared, the first refrigeration branch and the second refrigeration branch are communicated with the refrigeration cycle main path at the same time, the refrigerant in the refrigerant path absorbs heat, one side of the TEC refrigeration sheet, which is close to the second heat-conducting plate, is refrigerated, the second electromagnetic valve and the fourth electromagnetic valve are opened, and the third electromagnetic valve is closed; ta is the lowest refrigeration temperature of the TEC refrigeration piece, and tb is the economic refrigeration temperature of the compressor.
The minimum refrigeration temperature of the TEC refrigeration sheet is determined according to different types of the refrigeration sheet, and different minimum refrigeration temperatures can be selected according to requirements; when cold water with lower temperature is prepared, the refrigerating efficiency is lower only through the compressor, at the moment, the compressor and the TEC refrigerating sheet are used for carrying out secondary refrigeration, the water in the water tank is subjected to primary cooling through the second heat exchanger, and then the water flows through the second heat conducting plate and is further cooled through the TEC refrigerating sheet, so that the low-temperature cold water is generated for refrigerating the load; the refrigerating mode is suitable for the condition that the water temperature in the waterway circulation system is higher than the economic refrigerating temperature when the water chiller just starts to perform refrigerating operation, and can perform faster refrigerating.
Preferably, when cold water with the temperature range of [ ta, tb ] is prepared, the second refrigeration branch is communicated with the refrigeration cycle main path, one surface of the TEC refrigeration sheet, which is close to the second heat-conducting plate, is refrigerated, the second electromagnetic valve, the fourth electromagnetic valve and the fifth electromagnetic valve are opened, and the third electromagnetic valve is closed; ta is the lowest refrigeration temperature of the TEC refrigeration piece, and tb is the economic refrigeration temperature of the compressor.
The refrigeration and cooling can be performed in the waterway circulation system through the on-off of the electromagnetic valve until the TEC refrigeration sheet is used for refrigerating, and the refrigeration mode is suitable for the condition that the water temperature in the waterway circulation system is lower than the economic refrigeration temperature after the water chiller is refrigerated for a period of time, the refrigeration of a compressor is not needed, the refrigeration is directly performed through the TEC refrigeration sheet, and the efficiency is higher and the temperature control is more accurate.
Preferably, when hot water with the temperature range of [ td, te ] is prepared, the first refrigeration branch is communicated with the refrigeration cycle branch, the refrigerant in the refrigerant passage is condensed and releases heat, the second electromagnetic valve and the fourth electromagnetic valve are closed, and the third electromagnetic valve is opened; td is the hot water lower limit temperature and te is the economic heating temperature of the compressor.
The medium-temperature water limit temperature can be determined according to the actual environment temperature, and 35 ℃ is selected under normal conditions; the definition of the economic heating temperature of the compressor is similar to the economic refrigerating temperature of the compressor; when hot water with lower temperature is prepared, only a compressor is needed to be selected for heating, namely, the waterway circulation system only passes through the second heat exchanger.
Preferably, when hot water with the temperature range of [ te, tf ] is prepared, the first refrigeration branch and the second refrigeration branch are communicated with the refrigeration cycle main path at the same time, the refrigerant in the refrigerant path is condensed and releases heat, one side of the TEC refrigeration sheet close to the first heat-conducting plate is refrigerated, the second electromagnetic valve and the fourth electromagnetic valve are opened, and the third electromagnetic valve is closed; te is the economic heating temperature of the compressor, tf is the highest heating temperature of the TEC refrigerating sheet.
The highest heating temperature of the TEC refrigerating sheet is the temperature at which the hot surface of the TEC refrigerating sheet can be heated, and the corresponding TEC refrigerating sheet can be selected according to actual needs; when hot water with higher temperature is prepared, the two modes of heating by the compressor and heating by the TEC refrigerating sheet can be combined at the same time, so that the efficiency of water heating is improved; after the water in the water tank is initially heated by the second heat exchanger, the water is further heated by the second heat conducting plate, so that high-temperature hot water is generated to heat the load.
The invention has the following beneficial effects: the two-stage refrigeration mode combining the compressor refrigeration and the semiconductor TEC refrigeration sheet is adopted, different refrigeration modes are selected according to different cold water preparation temperatures, the cooling speed is high, the refrigeration efficiency is high, and the high-efficiency hot water preparation can be completed; the alternating of the cold surface and the hot surface can be defrosted only by leading forward current and reverse current to the TEC refrigerating plate, and a defrosting device is not required to be additionally added; the compressor is not required to be started and stopped frequently when refrigerating or heating work is carried out, so that the service life of the compressor is prolonged; the cold water and the hot water can be prepared in sections according to the temperature, and the water temperature can be controlled rapidly and accurately according to different requirements.
Drawings
FIG. 1 is a schematic diagram of a semiconductor TEC and compressor combined chiller according to the invention;
FIG. 2 is a schematic diagram of a chilled water chiller according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of chilled water chiller refrigeration in accordance with the second embodiment of the present invention;
FIG. 4 is a schematic diagram of chilled water chiller refrigeration in accordance with a third embodiment of the present invention;
FIG. 5 is a schematic diagram of a cold water machine-made hot water in accordance with a fourth embodiment of the present invention;
FIG. 6 is a schematic diagram of a hot water system with cold water in a fifth embodiment of the invention;
in the figure: 1. a compressor; 2. a four-way reversing valve; 3. a first heat exchanger; 4. a blower; 5. an electronic expansion valve; 6. a second heat exchanger; 7. a first electromagnetic valve; 8. a first heat-conducting plate; 9. a heat insulating material; 10. TEC refrigerating sheets; 11. heat conductive silicone grease; 12. a second heat-conducting plate; 13. a second electromagnetic valve; 14. a third electromagnetic valve; 15. a load; 16. a liquid level switch; 17. a water tank; 18. a water pump; 19. an exhaust pressure sensor; 20. an exhaust gas temperature sensor; 21. a suction pressure sensor; 22. an intake air temperature sensor; 23. a first water temperature sensor; 24. a second water temperature sensor; 25. a fourth electromagnetic valve; 26. a fifth electromagnetic valve; 61. a refrigerant passage; 62. a waterway passage.
Detailed Description
The invention is further described below with reference to the drawings and detailed description.
As shown in fig. 1, a semiconductor TEC and compressor combined water chiller system comprises a semiconductor TEC assembly and a second heat exchanger 6; the semiconductor TEC component comprises a TEC refrigerating sheet 10, wherein one surface of the TEC refrigerating sheet 10 is provided with a first heat-conducting plate 8, and the other surface of the TEC refrigerating sheet is provided with a second heat-conducting plate 12; the TEC cooling plate 10 is fixed between the first heat-conducting plate 8 and the second heat-conducting plate 12 through the heat insulation material 9, and both sides of the TEC cooling plate 10 are covered with heat-conducting silicone grease 11. The refrigerant passage 61 of the second heat exchanger 6 is connected into the refrigeration cycle main passage as a first refrigeration branch, and the first heat-conducting plate 8 is connected in series with the first electromagnetic valve 7 to be connected into the refrigeration cycle main passage as a second refrigeration branch; the waterway passage 62 of the second heat exchanger 6 and the second heat-conducting plate 12 are respectively connected into a waterway circulation system for refrigeration; the outlet of the waterway passage 62 is provided with a first water temperature sensor 23, and the outlet of the second heat-conductive plate 12 is provided with a second water temperature sensor 24.
The refrigeration cycle main path comprises a compressor 1, an outlet of the compressor 1 is connected with a b port of the four-way reversing valve 2, an inlet of the compressor 1 is connected with a d port of the four-way reversing valve 2, and the b port and the d port of the four-way reversing valve 2 are opposite; an exhaust gas pressure sensor 19 and an exhaust gas temperature sensor 20 are provided at the outlet of the compressor 1, and an intake gas pressure sensor 21 and an intake gas temperature sensor 22 are provided at the inlet of the compressor 1.
The port a of the four-way reversing valve 2 is connected with one end of the electronic expansion valve 5 through a first heat exchange component, and the first heat exchange component comprises a first heat exchanger 3 and a fan 4; the other end of the electronic expansion valve 5 is connected with one end of the refrigerant passage 61 and the first electromagnetic valve 7 respectively, and the c port of the four-way reversing valve 2 is connected with the other end of the refrigerant passage 61 and the first heat conducting plate 8 respectively.
The waterway circulation system comprises a water tank 17, and a liquid level switch 16 is arranged in the water tank 17; the outlet of the water tank 17 is connected with the inlet of the waterway passage 62 through the water pump 18; the outlet of the waterway passage 62 is connected with one end of the load 15 through the third electromagnetic valve 14; the outlet of the waterway passage 62 is also connected with the inlet of the second heat-conducting plate 12 through the second electromagnetic valve 13, and the outlet of the second heat-conducting plate 12 is connected with one end of the load 15 through the fourth electromagnetic valve 25; the other end of the load is connected to the inlet of the tank 17.
The outlet of the water pump 18 is also connected to one end of the fifth solenoid valve 26, and the other end of the fifth solenoid valve 26 is connected between the outlet of the waterway passage 62 and the first water temperature sensor 23.
The invention adopts a two-stage refrigeration mode formed by combining the semiconductor TEC refrigeration piece and the compressor refrigeration, has high temperature control precision and high temperature stability, and can overcome the defect of low cooling efficiency when the compressor prepares cold water with lower temperature by the semiconductor TEC refrigeration piece; the water chiller system comprises two sets of circulating systems, wherein the first set is a refrigerating circulating system: the system comprises a refrigeration cycle main circuit, a first refrigeration branch circuit and a second refrigeration branch circuit, wherein all parts in the refrigeration cycle system are communicated through copper pipe welding, and a circulating medium in the refrigeration cycle system is an environment-friendly refrigerant; the second set is a waterway circulation system, all parts in the waterway circulation system are connected through water pipes, a circulation medium of the waterway circulation system is a low-temperature-resistant water solution, and the low-temperature-resistant degree is determined according to the lowest refrigeration temperature of the water chiller; meanwhile, the defrosting process can be completed only by forward and reverse conduction of the current of the TEC refrigerating sheet, and an additional defrosting device is not needed.
The two pressure sensors in the refrigeration cycle main path are used for monitoring the pressure conditions of the air suction and exhaust ports of the compressor, the two temperature sensors are used for monitoring the temperature conditions of the air suction and exhaust ports of the compressor, and when an abnormal condition is detected, the control module can stop the operation of the water chiller and give an alarm. The liquid level switch in the water tank is used for monitoring the water level condition of the water tank, supplementing water when the water level is lower than an early warning line, and the two water temperature sensors are used for detecting and controlling the water temperature before entering the load.
The first heat exchange component comprises a first heat exchanger and a fan, the cold water machine further comprises a control module, the conduction direction of the four-way reversing valve and the current direction of the TEC refrigerating sheet can be controlled to determine whether the cold water machine is used for refrigerating water or heating water, and the specific opening degree of the electronic expansion valve can be controlled according to the detection data of the first water temperature sensor to control the dryness of the throttled refrigerant, so that the heat exchange efficiency of the second heat exchanger and the first heat conducting plate is controlled.
The load is a refrigerating or heating place in the waterway circulation system, and when the refrigerating is needed, the refrigerated cold water flows through the heat source load to cool and refrigerate, and then returns to the water tank to carry out waterway circulation again; when heating is needed, the heated hot water flows through a cold source load to be heated and then returns to the water tank to be recycled in the waterway; the second electromagnetic valve, the third electromagnetic valve and the fourth electromagnetic valve are closed and opened to control the water flow direction of the waterway circulation system; the opening and closing of the electromagnetic valve can be controlled by the control module according to the temperature of water which is refrigerated or heated as required.
According to the invention, the first water temperature sensor is used for detecting the temperature of water flowing out of the waterway passage, the second water temperature sensor is used for detecting the temperature of water flowing out of the second heat conducting plate, and the opening degree of the electronic expansion valve and the current flowing through the TEC refrigerating plate can be regulated by the control module according to the temperature value detected by the water temperature sensor so as to control the accurate temperature of the final water making; the connected fifth electromagnetic valve can enable circulating water in the waterway circulating system to directly circulate between the water tank and the second heat conducting plate.
The economic refrigeration temperature of the compressor is only balanced with the refrigeration capacity and the energy consumption of the compressor at a certain subzero temperature, and when the temperature of the refrigeration water is required to be lower than the temperature, the energy consumption of the compressor is increased, but the refrigeration efficiency is reduced, and at the moment, the defect of refrigeration of the compressor can be overcome by refrigerating by the TEC refrigeration piece; the upper limit temperature of the cold water is determined according to the actual ambient temperature, and 25 ℃ is usually selected; when preparing higher-temperature cold water, only refrigeration is needed by the compressor, and the waterway circulation system only flows through the second heat exchanger.
The minimum refrigeration temperature of the TEC refrigeration sheet is determined according to different types of the refrigeration sheet, and different minimum refrigeration temperatures can be selected according to requirements; when cold water with lower temperature is prepared, the refrigerating efficiency is lower only through the compressor, at the moment, the compressor and the TEC refrigerating sheet are used for carrying out secondary refrigeration, the water in the water tank is subjected to primary cooling through the second heat exchanger, and then the water flows through the second heat conducting plate and is further cooled through the TEC refrigerating sheet, so that the low-temperature cold water is generated for refrigerating the load; the refrigerating mode is suitable for the condition that the water temperature in the waterway circulation system is higher than the economic refrigerating temperature when the water chiller just starts to perform refrigerating operation, and can perform faster refrigerating.
The refrigeration and cooling can be performed in the waterway circulation system through the on-off of the electromagnetic valve until the TEC refrigeration sheet is used for refrigerating, and the refrigeration mode is suitable for the condition that the water temperature in the waterway circulation system is lower than the economic refrigeration temperature after the water chiller is refrigerated for a period of time, the refrigeration of a compressor is not needed, the refrigeration is directly performed through the TEC refrigeration sheet, and the efficiency is higher and the temperature control is more accurate.
The medium-temperature water limit temperature can be determined according to the actual environment temperature, and 35 ℃ is selected under normal conditions; the definition of the economic heating temperature of the compressor is similar to the economic refrigerating temperature of the compressor; when hot water with lower temperature is prepared, only a compressor is needed to be selected for heating, namely, the waterway circulation system only passes through the second heat exchanger.
The highest heating temperature of the TEC refrigerating sheet is the temperature at which the hot surface of the TEC refrigerating sheet can be heated, and the corresponding TEC refrigerating sheet can be selected according to actual needs; when hot water with higher temperature is prepared, the two modes of heating by the compressor and heating by the TEC refrigerating sheet can be combined at the same time, so that the efficiency of water heating is improved; after the water in the water tank is initially heated by the second heat exchanger, the water is further heated by the second heat conducting plate, so that high-temperature hot water is generated to heat the load.
In the examples of the present invention, the temperature of the cold water to be prepared is divided into [ -60 ℃, -20 ℃ ] and [ -20 ℃,25 ℃); the temperature for preparing hot water is divided into [35 ℃,50 ℃ and [50 ℃,80 ]; the circulating medium of the waterway circulating system is low-temperature water solution resistant to minus sixty degrees centigrade.
In the first embodiment, as shown in fig. 2, when cold water with the temperature range of [ tb, tc ] is prepared, the refrigeration cycle main path and the first refrigeration branch path are communicated, the port a and the port b of the four-way reversing valve 2 are communicated, the port c and the port d are communicated, the refrigerant in the refrigerant path absorbs heat, the second electromagnetic valve 13, the fourth electromagnetic valve 25 and the fifth electromagnetic valve 26 are closed, and the third electromagnetic valve 14 is opened; tb is the economic refrigeration temperature of the compressor below-20 ℃ and tc is the upper limit temperature of the cold water of 25 ℃.
The low-temperature and low-pressure refrigerant is compressed into high-temperature and high-pressure refrigerant gas through the compressor 1, the high-temperature and high-pressure refrigerant gas flows to the first heat exchanger 3 under the action of the four-way reversing valve 2, the refrigerant gas is condensed into low-temperature and high-pressure refrigerant liquid in the first heat exchanger through forced convection heat exchange of the fan 4, the low-temperature and high-pressure refrigerant liquid is throttled and depressurized into low-temperature and low-pressure gas-liquid two-phase refrigerant through the electronic expansion valve 5, the first electromagnetic valve 7 is closed, the refrigerant flows to a refrigerant passage of the second heat exchanger 6, the refrigerant absorbs heat in the second heat exchanger 6, the water temperature of the waterway circulation system is reduced, meanwhile, the low-temperature and low-pressure refrigerant gas flows back to the compressor 1 after passing through the four-way reversing valve 2.
In the waterway circulation system: the high-temperature water in the water tank 17 is transported into the waterway of the second heat exchanger 6 through the water pump 18 to exchange heat with the refrigerant to become cold water, the cold water flows into the heat source load 15 through the third electromagnetic valve 14 to reduce the load temperature, and the cold water returns to the water tank 17 after the temperature of the cold water is increased. In the waterway circulation system, according to the temperature value of the first water temperature sensor 23, the control module can adjust the opening of the electronic expansion valve 5 to control the dryness of the throttled refrigerant, so that the water temperature reaches the required temperature.
In the second embodiment, as shown in fig. 3, when cold water with the temperature range of [ ta, tb ] is prepared, the communication mode of the four-way reversing valve 2 is the same as that of the first embodiment, the first electromagnetic valve 7 is opened, the first refrigeration branch and the second refrigeration branch are simultaneously communicated with the refrigeration cycle main circuit, the refrigerant in the refrigerant passage absorbs heat, one side of the TEC refrigerating sheet close to the second heat-conducting plate is refrigerated, the second electromagnetic valve 13, the fourth electromagnetic valve 25 and the fifth electromagnetic valve 26 are opened, and the third electromagnetic valve 14 is closed; ta is the lowest refrigerating temperature of the TEC refrigerating sheet which is minus 60 ℃, and tb is the economical refrigerating temperature of the compressor which is minus 20 ℃. The embodiment is suitable for the condition of initial starting or high water temperature of the water tank.
The low-temperature and low-pressure refrigerant is compressed into high-temperature and high-pressure refrigerant gas through the work of the compressor 1, the high-temperature and high-pressure refrigerant gas flows to the first heat exchanger 3 under the action of the four-way reversing valve 2, the refrigerant gas is condensed into low-temperature and high-pressure refrigerant liquid in the first heat exchanger through forced convection heat exchange of the fan 4, the low-temperature and high-pressure refrigerant liquid is throttled and depressurized into low-temperature and low-pressure gas-liquid two-phase refrigerant through the electronic expansion valve 5, the first electromagnetic valve 7 is opened, a part of throttled refrigerant passes through a refrigerant passage of the second heat exchanger 6, and the refrigerant absorbs heat in the second heat exchanger 6, so that the water temperature of the waterway circulation system is primarily reduced, and meanwhile, the low-temperature and low-pressure refrigerant gas is changed. Applying forward current to the TEC refrigerating sheet 10, heating the surface, attached to the first heat-conducting plate 8, of the TEC refrigerating sheet 10, and attaching the cooling surface of the TEC refrigerating sheet to the second heat-conducting plate 12; the other part of the throttled refrigerant flows through the first electromagnetic valve 7 and then enters the first heat-conducting plate 8, the heat of the hot end of the TEC refrigerating sheet is absorbed and then evaporated into low-temperature and low-pressure gas, and the two parts of the evaporated refrigerant gas are converged and then flow back to the compressor 1 after passing through the four-way reversing valve 2.
In the waterway circulation system: the high-temperature water in the water tank 17 is transported to the waterway of the second heat exchanger 6 through the water pump 18 to exchange heat with the refrigerant to primarily reduce the water temperature, the cold water flows to the second heat-conducting plate 12 after passing through the second electromagnetic valve 13, the primarily cooled cold water is cooled again on the second heat-conducting plate, the heat dissipation temperature of the hot end of the TEC refrigerating plate is low (the temperature of the side of the refrigerant is low), the cold water at the cold end of the TEC refrigerating plate can be reduced to minus 60 ℃ at the lowest, the low-temperature cold water prepared on the second heat-conducting plate 12 flows to the heat source load 15 after passing through the fourth electromagnetic valve 25 to reduce the load temperature, and the cold water returns to the water tank 17 after the temperature of the cold water rises. In the waterway circulation system, the control module adjusts the opening of the electronic expansion valve 5 according to the temperature value of the first water temperature sensor 23 to control the dryness of the throttled refrigerant, so that the water temperature reaches the required primary cold water temperature in the first refrigeration, then flows into the second heat-conducting plate, and adjusts the current value input into the TEC refrigerating plate according to the value of the second water temperature sensor 24 to control the water temperature.
In the third embodiment, as shown in fig. 4, when cold water with the temperature range of [ ta, tb ] is prepared, the communication mode of the four-way reversing valve 2 is the same as that of the first embodiment, the first electromagnetic valve 7 is opened, the first refrigeration branch and the second refrigeration branch are communicated with the refrigeration cycle main circuit, one side of the TEC refrigeration sheet close to the second heat-conducting plate is refrigerated, the second electromagnetic valve 13, the fourth electromagnetic valve 25 and the fifth electromagnetic valve 26 are opened, and the third electromagnetic valve 14 is closed; ta is the lowest refrigerating temperature of the TEC refrigerating sheet which is minus 60 ℃, and tb is the economical refrigerating temperature of the compressor which is minus 20 ℃. The embodiment is suitable for the situation that the water temperature in the whole water tank and the waterway circulation system is lower than the economic refrigeration temperature of minus 20 ℃ after the water tank is started for a period of time, and is preferably between minus 30 ℃ and minus 40 ℃.
The procedure of the refrigerant cycle in this embodiment is the same as that of the embodiment, and in the waterway cycle system:
the high-temperature water in the water tank 17 is transported by the water pump 18, directly flows to the second electromagnetic valve 13 through the fifth electromagnetic valve 26 and then flows to the second heat-conducting plate 12, the temperature of the cold water is reduced on the second heat-conducting plate 12, the heat dissipation temperature of the hot end of the TEC refrigerating plate is low (the temperature of the side of the refrigerating agent is low), the cold water at the cold end of the TEC refrigerating plate can be reduced to minus 60 ℃ at the lowest, the low-temperature cold water prepared by the second heat-conducting plate 12 flows to the heat source load 15 through the fourth electromagnetic valve 25, the load temperature is reduced, and the cold water returns to the water tank 17 after the temperature of the cold water is increased. In the waterway circulation system, the magnitude of the current value input into the TEC refrigerating sheet is directly regulated by the control module according to the value of the second water temperature sensor 24 to control the water temperature.
In the fourth embodiment, as shown in fig. 5, when hot water with the temperature range of [ td, te ] is prepared, the port a and the port d of the four-way reversing valve 2 are communicated, the port c and the port b are communicated, the first refrigeration branch is communicated with the refrigeration cycle branch, the refrigerant in the refrigerant passage is condensed to release heat, the second electromagnetic valve 13, the fourth electromagnetic valve 25 and the fifth electromagnetic valve 26 are closed, and the third electromagnetic valve 14 is opened; td is the lower limit temperature of hot water of 35 ℃, and te is the economical heating temperature of the compressor of 50 ℃.
The low-temperature and low-pressure refrigerant is compressed into high-temperature and high-pressure refrigerant gas through the compressor 1, the first electromagnetic valve 7 is closed, the high-temperature and high-pressure refrigerant gas flows to a refrigerant passage of the second heat exchanger 6 under the action of the four-way reversing valve 2, the high-temperature and high-pressure refrigerant gas is subjected to condensation heat exchange in the second heat exchanger 6, the refrigerant is subjected to heat exchange with circulating water to be condensed into low-temperature and high-pressure liquid refrigerant, the low-temperature and high-pressure liquid refrigerant is throttled and depressurized into low-temperature and low-pressure gas-liquid two-phase refrigerant through the electronic expansion valve 5, the low-temperature and low-pressure refrigerant is subjected to forced convection heat exchange through the fan 4 in the first heat exchanger 3, so that the low-temperature and low-pressure refrigerant is subjected to heat absorption and evaporation into low-temperature and low-pressure gas in the first heat exchanger 3, and the low-temperature and low-pressure refrigerant gas is returned to the compressor 1 through the four-way reversing valve 2.
In the waterway circulation system: the high-temperature water in the water tank 17 is transported into the waterway of the second heat exchanger 6 through the water pump 18 to exchange heat with the refrigerant to become hot water, the heated hot water flows into the cold source load 15 through the third electromagnetic valve 14 to raise the load temperature, and the hot water returns to the water tank 17 after the load water temperature is reduced. The waterway circulation system adjusts the water temperature by adjusting the opening of the electronic expansion valve 5 through the control module according to the temperature value of the first water temperature sensor 23, so that the water temperature reaches the required temperature.
In the fifth embodiment, as shown in fig. 6, when hot water with the temperature range of [ te, tf ] is prepared, the four-way reversing valve 2 is communicated in the same way as in the fourth embodiment, the electromagnetic valve 7 is opened, the first refrigeration branch and the second refrigeration branch are simultaneously communicated with the refrigeration cycle main circuit, the refrigerant in the refrigerant passage is condensed and releases heat, one side of the TEC refrigerating sheet close to the first heat conducting plate is refrigerated, the second electromagnetic valve 13, the fourth electromagnetic valve 25 and the fifth electromagnetic valve 26 are opened, and the third electromagnetic valve 14 is closed; te is the economic heating temperature of the compressor of 50 ℃, tf is the highest heating temperature of the TEC refrigerating sheet of 80 ℃.
The low-temperature low-pressure refrigerant is compressed into high-temperature high-pressure refrigerant gas through the work of the compressor 1, the first electromagnetic valve 7 is opened, a part of the high-temperature high-pressure refrigerant gas is subjected to condensation heat exchange in the refrigerant passage of the second heat exchanger 6 under the action of the four-way reversing valve 2, and the refrigerant and circulating water are subjected to heat exchange and condensation to form low-temperature high-pressure refrigerant liquid; the TEC refrigerating plate 10 is electrified with reverse current, the other part of high-temperature high-pressure refrigerant gas passes through the first heat-conducting plate 8 attached to the refrigerating surface of the TEC refrigerating plate 10, the heating surface of the semiconductor TEC refrigerating assembly 10 is attached to the second heat-conducting plate 12, the part of the refrigerant is condensed into low-temperature high-pressure liquid in the first heat-conducting plate 8, the condensed two parts of low-temperature high-pressure refrigerant liquid are converged and then enter the electronic expansion valve 5, the two parts of low-temperature high-pressure refrigerant liquid are throttled and depressurized by the electronic expansion valve 5 to form low-temperature low-pressure gas-liquid two-phase refrigerant, the low-temperature low-pressure refrigerant is subjected to forced convection heat exchange by the fan 4 in the first heat exchanger 3, so that the low-temperature low-pressure refrigerant absorbs heat and evaporates into low-temperature low-pressure gas in the first heat exchanger 3, and the low-temperature low-pressure refrigerant gas returns to the compressor 1 through the four-way reversing valve 2.
In the waterway circulation system: the cold water in the water tank 17 is transported to the waterway of the second heat exchanger 6 through the water pump 18 to exchange heat with the refrigerant to primarily raise the water temperature, the raised water flows to the second heat-conducting plate 12 after passing through the second electromagnetic valve 13, the primarily raised hot water is heated again on the second heat-conducting plate 12, the heating surface of the TEC refrigerating plate can be raised to 80 ℃ by passing through reverse current, so that the temperature of the second heat-conducting plate 12 is raised, the high-temperature hot water prepared on the second heat-conducting plate flows to the cold source load 15 after passing through the fourth electromagnetic valve 25, so that the load temperature is raised, and the hot water returns to the water tank 17 after the temperature of the hot water is lowered. The control module in the waterway circulation system adjusts the opening of the electronic expansion valve 5 according to the temperature value of the first water temperature sensor 23 to control the dryness of the throttled refrigerant, so that the water temperature reaches the temperature of the needed primary hot water, then flows into the second heat-conducting plate, and adjusts the current value input into the TEC refrigerating plate according to the value of the second water temperature sensor 24 to control the water temperature.
The foregoing embodiments are further illustrative and explanatory of the invention, as is not restrictive of the invention, and any modifications, equivalents, and improvements made within the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims (9)

1. A semiconductor TEC and compressor combined water chiller system is characterized by comprising a semiconductor TEC component and a second heat exchanger (6); the semiconductor TEC component comprises a TEC refrigerating sheet (10), wherein one surface of the TEC refrigerating sheet (10) is provided with a first heat conducting plate (8), and the other surface of the TEC refrigerating sheet is provided with a second heat conducting plate (12); the refrigerant passage (61) of the second heat exchanger (6) is used as a first refrigeration branch to be connected into a refrigeration cycle main circuit, and the first heat-conducting plate (8) is connected in series with the first electromagnetic valve (7) to be used as a second refrigeration branch to be connected into the refrigeration cycle main circuit; the waterway passage (62) of the second heat exchanger (6) and the second heat conducting plate (12) are respectively connected into a waterway circulation system for refrigeration.
2. The semiconductor TEC and compressor combined water chiller system according to claim 1 wherein the refrigeration cycle main circuit comprises a compressor (1), wherein an outlet of the compressor (1) is connected with a b port of a four-way reversing valve (2), and an inlet of the compressor (1) is connected with a d port of the four-way reversing valve (2); an a port of the four-way reversing valve (2) is connected with one end of the electronic expansion valve (5) through the first heat exchange component (3); the other end of the electronic expansion valve (5) is respectively connected with one end of the refrigerant passage (61) and the first electromagnetic valve (7), and the c port of the four-way reversing valve (2) is respectively connected with the other end of the refrigerant passage (61) and the first heat conducting plate (8).
3. A semiconductor TEC and compressor combined chiller system according to claim 1 or 2 wherein the water circuit circulation system comprises a water tank (17), the outlet of the water tank (17) being connected to the inlet of a water circuit (62) by a water pump (18); the outlet of the waterway passage (62) is connected with one end of the load (15) through a third electromagnetic valve (14); the outlet of the waterway passage (62) is also connected with the inlet of the second heat-conducting plate (12) through a second electromagnetic valve (13), and the outlet of the second heat-conducting plate (12) is connected with one end of the load (15) through a fourth electromagnetic valve (25); the other end of the load (15) is connected with the inlet of the water tank (17); the outlet of the waterway passage (62) is provided with a first water temperature sensor (23), and the outlet of the second heat-conducting plate (12) is provided with a second water temperature sensor (24).
4. A semiconductor TEC and compressor combined chiller system according to claim 3 wherein the outlet of the water pump (18) is also in communication with one end of a fifth solenoid valve (26), the other end of the fifth solenoid valve (26) being connected between the outlet of the waterway (62) and the first water temperature sensor (23).
5. The semiconductor TEC and compressor combined chiller system according to claim 3 wherein when chilled water having a temperature range of [ tb, tc ] is produced, the main refrigeration cycle and the first refrigeration branch are connected, the refrigerant in the refrigerant path absorbs heat, the second solenoid valve and the fourth solenoid valve are closed, and the third solenoid valve is opened; tb is the economic cooling temperature of the compressor, and tc is the cold water upper limit temperature.
6. The compound semiconductor TEC and compressor chiller system according to claim 3 or 5 wherein when cold water in the temperature range [ ta, tb ] is produced, the first refrigeration branch and the second refrigeration branch are simultaneously communicated with the refrigeration cycle main circuit, the refrigerant in the refrigerant passage absorbs heat, the TEC refrigeration sheet cools the side close to the second heat-conducting plate, the second electromagnetic valve and the fourth electromagnetic valve are opened, and the third electromagnetic valve is closed; ta is the lowest refrigeration temperature of the TEC refrigeration piece, and tb is the economic refrigeration temperature of the compressor.
7. The compound semiconductor TEC and compressor chiller system as set forth in claim 4 wherein when cold water having a temperature range [ ta, tb ] is produced, the second refrigeration branch is connected to the refrigeration cycle main circuit, the TEC refrigeration sheet cools the side of the TEC refrigeration sheet adjacent to the second heat-conducting plate, the second solenoid valve, the fourth solenoid valve and the fifth solenoid valve are opened, and the third solenoid valve is closed; ta is the lowest refrigeration temperature of the TEC refrigeration piece, and tb is the economic refrigeration temperature of the compressor.
8. The compound semiconductor TEC and compressor chiller system according to claim 3 wherein when hot water having a temperature in the range of [ td, te ] is produced, the first refrigeration branch is connected to the refrigeration cycle branch, the refrigerant in the refrigerant path is cooled by condensation, the second solenoid valve and the fourth solenoid valve are closed, and the third solenoid valve is opened; td is the hot water lower limit temperature and te is the economic heating temperature of the compressor.
9. The compound semiconductor TEC and compressor chiller system according to claim 3 or 8 wherein when hot water in the temperature range [ te, tf ] is produced, the first refrigeration branch and the second refrigeration branch are simultaneously communicated with the refrigeration cycle main circuit, the refrigerant in the refrigerant passage condenses and releases heat, one side of the TEC refrigerating plate close to the first heat conducting plate refrigerates, the second electromagnetic valve and the fourth electromagnetic valve are opened, and the third electromagnetic valve is closed; te is the economic heating temperature of the compressor, tf is the highest heating temperature of the TEC refrigerating sheet.
CN202211532302.4A 2022-12-01 2022-12-01 Semiconductor TEC and compressor combined water chiller system Pending CN116263278A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211532302.4A CN116263278A (en) 2022-12-01 2022-12-01 Semiconductor TEC and compressor combined water chiller system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211532302.4A CN116263278A (en) 2022-12-01 2022-12-01 Semiconductor TEC and compressor combined water chiller system

Publications (1)

Publication Number Publication Date
CN116263278A true CN116263278A (en) 2023-06-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211532302.4A Pending CN116263278A (en) 2022-12-01 2022-12-01 Semiconductor TEC and compressor combined water chiller system

Country Status (1)

Country Link
CN (1) CN116263278A (en)

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