CN117628761A - Parallel type accurate cold and hot temperature control system - Google Patents
Parallel type accurate cold and hot temperature control system Download PDFInfo
- Publication number
- CN117628761A CN117628761A CN202311784698.6A CN202311784698A CN117628761A CN 117628761 A CN117628761 A CN 117628761A CN 202311784698 A CN202311784698 A CN 202311784698A CN 117628761 A CN117628761 A CN 117628761A
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- China
- Prior art keywords
- temperature control
- flow path
- oil
- control system
- cold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000003921 oil Substances 0.000 claims abstract description 73
- 239000007788 liquid Substances 0.000 claims abstract description 47
- 239000003507 refrigerant Substances 0.000 claims abstract description 40
- 238000004891 communication Methods 0.000 claims abstract description 25
- 239000012530 fluid Substances 0.000 claims abstract description 25
- 238000005485 electric heating Methods 0.000 claims abstract description 16
- 239000010687 lubricating oil Substances 0.000 claims abstract description 16
- 239000000498 cooling water Substances 0.000 claims abstract description 13
- 238000000967 suction filtration Methods 0.000 claims abstract description 11
- 238000011144 upstream manufacturing Methods 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000000314 lubricant Substances 0.000 claims 1
- 238000005057 refrigeration Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000153 supplemental effect Effects 0.000 description 1
Classifications
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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
- 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
- F25B49/022—Compressor control 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
- F25B39/00—Evaporators; Condensers
-
- 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
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion 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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The parallel precise cold and hot temperature control system comprises a heat conducting oil temperature control loop part provided with an electric heating device, an evaporator, a gas-liquid separator, a compressor unit, a lubricating oil suction filtration device, a condenser and a throttle valve. The evaporator is provided with a heat conduction oil flow path and a liquid refrigerant flow path; the compressor unit is formed by selectively connecting a plurality of compressors with different exhaust capacities in parallel; the lubricating oil suction filtration device and the compressor form a lubricating oil circulation loop; the condenser has a cooling water flow path and a gaseous refrigerant flow path arranged in a mutually exchangeable manner; the throttle valve is in fluid communication with the gaseous refrigerant flow path of the condenser, the gas-liquid separator, and the evaporator, respectively. The cold and hot temperature control system realizes accurate constant temperature control of the terminal equipment to be cooled/heated by optimally selecting and combining the cooling water loop, the heat conducting oil loop, the refrigerant loop and the lubricating oil loop. The cold and hot integrated temperature control system can realize accurate control of any temperature within a wide range from minus 25 ℃ to 200 ℃ with the control precision of +/-0.5 ℃.
Description
Technical Field
The invention relates to a cold and hot integrated temperature control system.
Background
The purpose of the thermostatic control system is to keep the temperature of the controlled object constant at a certain value and to require that the fluctuation amplitude (i.e. steady state error) cannot exceed a certain given value. The existing cold and hot temperature control system is easy to be influenced by the ambient temperature and the like, has a large fluctuation range, and is difficult to adapt to occasions with high requirements on constant temperature environment in the production process.
Disclosure of Invention
The invention aims to provide a temperature control system capable of performing accurate cold and hot control.
The cold and hot temperature control system provided by the invention comprises:
the heat conduction oil temperature control loop part comprises an oil return pipeline and a temperature control oil outlet pipeline, wherein the temperature control oil outlet pipeline is provided with an electric heating device;
the evaporator is provided with a heat conducting oil flow path and a liquid refrigerant flow path which are arranged in a mutually heat-exchanging way, wherein the heat conducting oil flow path is provided with an input end and an output end, the input end is connected with an oil return pipeline of the heat conducting oil temperature control loop part, the output end is connected with a temperature control oil outlet pipeline of the heat conducting oil temperature control loop part, and the liquid refrigerant flow path is provided with an upstream end and a downstream end;
a gas-liquid separator having an inlet in fluid communication with a downstream end of the liquid refrigerant flow path of the evaporator, a liquid return port, and an air outlet;
the compressor unit is formed by selectively connecting a plurality of compressors with different exhaust capacities in parallel, each compressor is provided with an air inlet end, an air outlet end and an oil return port, and the air inlet end is in fluid communication with an air outlet of the gas-liquid separator;
the lubricating oil suction filtration device is provided with an inlet, an oil return port and an air outlet, wherein the inlet is in fluid communication with the air outlet end of each compressor, and the oil return port is in selective fluid communication with the oil return port of each compressor;
a condenser having a cooling water flow path and a gaseous refrigerant flow path arranged in a mutually exchangeable manner, wherein the cooling water flow path has an input end and an output end, the input end is connected with a water inlet pipe and the output end is connected with a water outlet pipe, the gaseous refrigerant flow path has an upstream end and a downstream end, and the upstream end is in fluid communication with an air outlet of the lubricating oil suction filtration device; and
the throttle valve has an upstream end, a liquid return port and a downstream end, wherein the upstream end is in fluid communication with the downstream end of the gaseous refrigerant flow path of the condenser, the liquid return port is in fluid communication with the liquid return port of the gas-liquid separator, and the downstream end is in fluid communication with the upstream end of the liquid refrigerant flow path of the evaporator.
According to the cold and hot temperature control system, the oil return pipeline of the heat conduction oil temperature control loop part can be provided with a temperature sensor; the temperature control oil outlet pipeline can be provided with a temperature sensor at the upstream of the electric heating device, and a pressure pump, a pressure sensor and a temperature sensor can be sequentially arranged at the downstream of the electric heating device.
According to the cold and hot temperature control system, both the water inlet pipeline and the water outlet pipeline can be provided with temperature sensors.
According to the cold and hot temperature control system, a temperature sensor and a pressure sensor can be respectively arranged between the gas-liquid separator and the compressor unit.
According to the cold and hot temperature control system, a temperature sensor and a pressure sensor can be respectively arranged between the air outlet end of the compressor and the inlet of the lubricating oil suction filtration device.
The cold and hot temperature control system according to the present invention may further include a controller controlling the operation of the electric heating device and/or the compressor unit, etc. based on feedback of the corresponding temperature sensor and/or the pressure sensor, etc., thereby controlling the output end temperature of the temperature control oil outlet pipe of the heat transfer oil temperature control loop portion.
The cold and hot temperature control system realizes accurate constant temperature control of the terminal equipment to be cooled/heated by optimally selecting and combining the cooling water loop, the heat conducting oil loop, the refrigerant loop and the lubricating oil loop. The cold and hot integrated temperature control system can realize accurate control of any temperature within a wide range from minus 25 ℃ to 200 ℃ with the control precision of +/-0.5 ℃. By adopting the selectable combination mode of three compressors with different power in parallel, corresponding precision can be ensured when the refrigeration capacity is changed; compared with the traditional single compressor mode, the power consumption is smaller, and the energy efficiency ratio is higher.
Drawings
Fig. 1 is a schematic structural diagram of a cold and hot temperature control system according to the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a cold and hot temperature control system according to the present invention. As shown in fig. 1, the cold and hot temperature control system of the present invention generally includes a heat transfer oil temperature control loop portion, an evaporator 2, a gas-liquid separator 3, a compressor unit, a lubricating oil suction filter device 5, a condenser 6, a throttle valve 7, a controller, and the like.
The heat conducting oil temperature control loop part comprises an oil return pipeline and a temperature control oil outlet pipeline. The temperature-control oil outlet pipeline is provided with an output end Oo, and is externally connected with terminal equipment to be cooled or heated so as to output the heat conduction oil with the temperature accurately regulated. An electric heating device 1 is arranged on the temperature-control oil outlet pipeline. Between the electric heating device 1 and the output end Oo, a temperature-controlled oil outlet pipeline is provided with a pressure pump 8, a pressure sensor P and a temperature sensor T in sequence. The temperature control oil outlet pipeline is also provided with a temperature sensor T at the upstream of the electric heating device 1; the electric heating device 1 correspondingly heats the heat conduction oil in the temperature control oil outlet pipeline according to the feedback of the upstream and downstream temperature sensors T and the temperature requirement of the terminal equipment; the pressure pump 8 is started to perform corresponding pressurizing operation according to the feedback of the pressure sensor P and the pressure requirement of the terminal equipment. The oil return pipeline is also provided with a temperature sensor T, and the return end Oi of the oil return pipeline is externally connected with terminal equipment. The heat conduction oil enters the external equipment from the output end Oo of the temperature control oil outlet pipeline to finish heat exchange, and then can flow into the return end Oi of the oil return pipeline.
The evaporator 2 has a conduction oil flow path (left side in the drawing) and a liquid refrigerant flow path (right side in the drawing) arranged to be mutually heat-exchangeable. The conduction oil flow path is provided with an input end (lower end in the figure) and an output end (upper end in the figure), wherein the input end is connected with an oil return pipeline of the conduction oil temperature control loop part, and the output end is connected with a temperature control oil outlet pipeline of the conduction oil temperature control loop part. The liquid refrigerant flow path has an upstream end (lower end shown) and a downstream end (upper end shown) in which liquid refrigerant circulates, as described further below.
During low-temperature (for example, -25 ℃) refrigeration operation, the liquid refrigerant circulating in the liquid refrigerant flow path can correspondingly refrigerate the heat conduction oil circulating in the heat conduction oil flow path; the electric heating device 1 is activated when necessary to fine-tune the refrigeration temperature of the heat transfer oil. In the high temperature (e.g., 200 ℃) heating operation, the electric heating device 1 may be started and the evaporator 2 may be turned off.
The gas-liquid separator 3 has an inlet in fluid communication with the downstream end of the liquid refrigerant flow path of the evaporator 2 as shown, a liquid return port, and an air outlet. The gas-liquid separator 3 is for separating the received refrigerant into a gas-phase or gaseous refrigerant flowing out from the gas outlet and a liquid-phase or liquid refrigerant flowing out from the liquid return port.
The compressor unit is composed of three compressors 4a (larger discharge amount), 4b (middle discharge amount) and 4c (smaller discharge amount) with different discharge amounts selectively connected in parallel. Each compressor has an inlet end, an outlet end, and an oil return port. The air inlet end of the compressor (group) is in fluid communication with the air outlet of the gas-liquid separator 3, a temperature sensor T and a pressure sensor P are respectively arranged between the air inlet end and the air outlet of the compressor (group), and the corresponding compressor group can be selectively started to flexibly compress and control the inflowing gaseous refrigerant according to the refrigeration control degree.
The lubricating oil suction filtration device 5 is provided with an inlet, an oil return port and an air outlet; the inlet is in fluid communication with the outlet end of the compressor(s). The lubricating oil suction filtration device 5 performs lubricating oil suction filtration operation on the received gaseous refrigerant, the separated lubricating oil is discharged from the liquid return port, and the separated gaseous refrigerant flows out from the air outlet. The oil return port is in selective fluid communication (via a dashed line) with the oil return port of the compressor(s) for providing supplemental lubrication to the respective compressor(s) as desired.
The condenser 6 has a cooling water flow path and a gaseous refrigerant flow path arranged to be mutually heat-exchangeable. The cooling water flow path is provided with an input end and an output end, wherein the input end is connected with a water inlet pipeline, and the output end is connected with a water outlet pipeline; the water inlet pipeline flows in cooling water with lower temperature (for example, about 30 ℃) from the input end Wi, and the water outlet pipeline flows out cooling water with higher temperature (for example, about 35 ℃) from the output end Wo. The cooling water is circulated in the cooling water flow path and used for cooling the gaseous refrigerant circulated in the gaseous refrigerant flow path; the water inlet pipeline and the water outlet pipeline are both provided with temperature sensors T for heat exchange control. The gaseous refrigerant flow path has an upstream end in fluid communication with the air outlet of the lube oil pumping unit 5 and a downstream end.
The throttle valve 7 has an upstream end in fluid communication with the downstream end of the gaseous refrigerant flow path of the condenser 6, a liquid return port in fluid communication with the liquid return port of the gas-liquid separator 3, and a downstream end in fluid communication with the upstream end of the liquid refrigerant flow path of the evaporator 2. The throttle valve 7 is used to change the inflow gas refrigerant into a liquid refrigerant and then to outflow the liquid refrigerant.
Although not specifically shown, the cold and hot control system of the present invention may further include a controller that may control the operation of the electric heating device and/or the compressor unit, etc. based on feedback from the above-mentioned corresponding temperature sensor and/or pressure sensor, so as to precisely control the output end temperature of the temperature control oil outlet pipe of the heat transfer oil temperature control loop portion (control accuracy may reach ±0.5 ℃).
In the cooling/heating control system of the present invention, a control device such as a valve may be provided for each flow path and pipe.
Claims (6)
1. A cold and hot temperature control system comprising:
the heat conduction oil temperature control loop part comprises an oil return pipeline and a temperature control oil outlet pipeline, wherein the temperature control oil outlet pipeline is provided with an electric heating device;
the evaporator is provided with a heat conducting oil flow path and a liquid refrigerant flow path which are arranged in a mutually heat-exchanging way, wherein the heat conducting oil flow path is provided with an input end and an output end, the input end is connected with an oil return pipeline of the heat conducting oil temperature control loop part, the output end is connected with a temperature control oil outlet pipeline of the heat conducting oil temperature control loop part, and the liquid refrigerant flow path is provided with an upstream end and a downstream end;
a gas-liquid separator having an inlet in fluid communication with a downstream end of the liquid refrigerant flow path of the evaporator, a liquid return port, and an air outlet;
the compressor unit is formed by selectively connecting a plurality of compressors with different exhaust capacities in parallel, each compressor is provided with an air inlet end, an air outlet end and an oil return port, and the air inlet end is in fluid communication with an air outlet of the gas-liquid separator;
the lubricating oil suction filtration device is provided with an inlet, an oil return port and an air outlet, wherein the inlet is in fluid communication with the air outlet end of each compressor, and the oil return port is in selective fluid communication with the oil return port of each compressor;
a condenser having a cooling water flow path and a gaseous refrigerant flow path arranged in a mutually exchangeable manner, wherein the cooling water flow path has an input end and an output end, the input end is connected with a water inlet pipe and the output end is connected with a water outlet pipe, the gaseous refrigerant flow path has an upstream end and a downstream end, and the upstream end is in fluid communication with an air outlet of the lubricating oil suction filtration device; and
the throttle valve has an upstream end, a liquid return port and a downstream end, wherein the upstream end is in fluid communication with the downstream end of the gaseous refrigerant flow path of the condenser, the liquid return port is in fluid communication with the liquid return port of the gas-liquid separator, and the downstream end is in fluid communication with the upstream end of the liquid refrigerant flow path of the evaporator.
2. The cold and hot temperature control system according to claim 1, wherein an oil return line of the heat transfer oil temperature control circuit part is provided with a temperature sensor; the temperature control oil outlet pipeline is provided with a temperature sensor at the upstream of the electric heating device, and a pressure pump, a pressure sensor and a temperature sensor are sequentially arranged at the downstream of the electric heating device.
3. The cold and hot temperature control system according to claim 1, wherein both the water inlet pipe and the water outlet pipe are provided with temperature sensors.
4. The cold and hot temperature control system according to claim 1, wherein a temperature sensor and a pressure sensor are respectively provided between the gas-liquid separator and the compressor unit.
5. The cold and hot temperature control system according to claim 1, wherein a temperature sensor and a pressure sensor are respectively provided between the air outlet end of the compressor and the inlet of the lubricant suction filtration device.
6. The cold and hot temperature control system according to any one of claims 2-5, further comprising a controller controlling the operation of the electric heating device and/or the compressor unit based on feedback from the respective temperature sensor and/or pressure sensor, thereby controlling the output temperature of the temperature control oil outlet pipe of the heat transfer oil temperature control loop portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311784698.6A CN117628761A (en) | 2023-12-23 | 2023-12-23 | Parallel type accurate cold and hot temperature control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311784698.6A CN117628761A (en) | 2023-12-23 | 2023-12-23 | Parallel type accurate cold and hot temperature control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117628761A true CN117628761A (en) | 2024-03-01 |
Family
ID=90037774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311784698.6A Pending CN117628761A (en) | 2023-12-23 | 2023-12-23 | Parallel type accurate cold and hot temperature control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117628761A (en) |
-
2023
- 2023-12-23 CN CN202311784698.6A patent/CN117628761A/en active Pending
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