Intelligent joint control freeze type drier

Abstract

The utility model relates to air purification equipment technical field, concretely relates to an intelligent joint control refrigeration type drying machine, including cold dry machine heat exchanger, gas -liquid separator, frequency conversion refrigeration compressor, oil separator, air -cooled and water -cooled condenser, high pressure liquid storage tank and liquid pipe filter, air -cooled and water -cooled condenser are equipped with fan, cooling water inlet and outlet and water flow regulating valve, and each component is connected in proper order and forms refrigeration cycle. The design is through sensor collection cold dry temperature, air import and export temperature and pressure, evaporation pressure and condensation pressure etc. parameter, by module control program independent control each cold dry machine module's start -stop and frequency conversion regulation, realizes load self -adaptation regulation, simultaneously, and air path passes through pneumatic butterfly valve automatic control, need not manual operation, the utility model realizes intelligent joint control, accurate matching load, energy -conserving operation, and supports fast expansion and independent maintenance.

Description

Technical Field

[0001] This utility model relates to the field of air purification equipment technology, and in particular to an intelligent controllable refrigerated dryer. Background Technology

[0002] Refrigerated dryers, as a key component of air purification equipment, play a vital role in industrial production. Traditional refrigerated dryers effectively remove moisture from compressed air by lowering its temperature, causing water vapor in the air to condense into liquid water and be discharged. This improves air quality, prevents damage to downstream air-using equipment due to moisture, and ensures the stability of the production process and product quality. Their applications are wide-ranging, covering multiple industries such as electronics, chemicals, food, and pharmaceuticals, providing these industries with dry, clean compressed air to meet the air quality requirements of different production processes.

[0003] However, under high-volume operating conditions, traditional refrigerated dryers require multiple units to operate simultaneously, and each dryer is independently controlled. This control method results in a significant manpower requirement for starting, stopping, and adjusting the dryers, increasing labor costs and management difficulty. Furthermore, multiple units occupy a large area, requiring ample space in the production site. Moreover, if increased processing capacity is needed later, expansion operations are difficult, requiring replanning and reinstallation of equipment, wasting time and money. Additionally, independently controlled dryers cannot be precisely adjusted according to actual load conditions, potentially leading to energy waste and reduced energy efficiency. Utility Model Content

[0004] The purpose of this invention is to provide an intelligent, interconnected, refrigerated dryer, aiming to solve the problems of existing technologies where, under high-flow conditions, multiple traditional refrigerated dryers need to operate simultaneously, and each dryer is independently controlled. This control method results in a large amount of manpower required for starting, stopping, and adjusting the dryers, increasing labor costs and management difficulty. Furthermore, multiple units occupy a large area, requiring significant space in the production site. Moreover, if increased processing capacity is needed later, expansion operations are difficult, requiring replanning and reinstallation of equipment, wasting time and money. In addition, independently controlled dryers are difficult to precisely adjust according to actual load conditions, potentially leading to energy waste and reduced energy utilization efficiency.

[0005] To achieve the above objectives, this utility model employs an intelligent interconnected refrigerated dryer, comprising a refrigerated dryer heat exchanger, a gas-liquid separator, a variable frequency refrigeration compressor, an oil separator, an air-cooled and water-cooled condenser, a high-pressure liquid storage tank, and a liquid pipeline filter. The air-cooled and water-cooled condenser is equipped with a fan, a cooling water outlet, and a cooling water inlet. A water flow regulating valve is installed on the cooling water outlet. The refrigerated dryer heat exchanger is connected to the gas-liquid separator, the gas-liquid separator is connected to the variable frequency refrigeration compressor, the variable frequency refrigeration compressor is connected to the oil separator, the oil separator is connected to the air-cooled and water-cooled condenser, the air-cooled and water-cooled condenser is connected to the high-pressure liquid storage tank, the high-pressure liquid storage tank is connected to the liquid pipeline filter, and the liquid pipeline filter is connected to the refrigerated dryer heat exchanger.

[0006] The refrigerated dryer heat exchanger is equipped with a zero-air-consumption drain, a refrigerated dry air temperature sensor, an air inlet, and an air outlet.

[0007] The oil separator is connected to the variable frequency refrigeration compressor via an oil pipeline and is located at the suction port of the variable frequency refrigeration compressor.

[0008] A thermal expansion valve is provided at the connection between the liquid pipeline filter and the heat exchanger of the refrigerated dryer, and a hot gas bypass pipeline solenoid valve is provided between the oil separator and the thermal expansion valve.

[0009] The oil separator is equipped with a refrigerant discharge pressure sensor at the connection between it and the variable frequency refrigeration compressor, and the gas-liquid separator is equipped with a refrigerant suction pressure sensor at the connection between it and the variable frequency refrigeration compressor.

[0010] This utility model discloses an intelligent interconnected control refrigerated dryer. The design utilizes sensors for refrigeration temperature, air inlet temperature, evaporation pressure, condensation pressure, air inlet pressure, and air outlet pressure. A modular control program independently controls the operation of each refrigerated dryer module. The module control program uses the operating parameters of each module to control their on / off actions. Through frequency conversion adjustment of individual modules and start / stop control of each module, a wider load handling coverage is achieved. This significantly improves the energy utilization rate of the compressor when operating at a larger capacity, especially under lower load conditions, thus achieving energy savings. Furthermore, the operation control of the refrigerated dryer modules is achieved by switching the power supply on and off, and the air path control is achieved by opening and closing the pneumatic butterfly valve on the inlet air pipeline. For large flow rate changes, the refrigerated dryer can automatically adjust according to the parameters of each module without manual operation. This intelligent interconnected control also improves the rationality and accuracy of equipment operation. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a flowchart illustrating the workflow of the intelligent interconnected refrigerated dryer of this utility model.

[0013] 1-Variable frequency refrigeration compressor, 2-Gas-liquid separator, 3-Oil separator, 4-Air-cooled and water-cooled condenser, 5-Liquid line filter, 6-Thermal expansion valve, 7-Refrigerated dryer heat exchanger, 8-Zero gas consumption drainer, 9-Refrigerant suction pressure sensor, 10-Refrigerant discharge pressure sensor, 11-Hot gas bypass pipeline solenoid valve, 12-Water flow regulating valve, 13-High pressure liquid storage tank, 14-Refrigerated dry air temperature sensor, 15-Air inlet, 16-Air outlet, 17-Fan, 18-Condensate drain outlet. Detailed Implementation

[0014] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0015] Please see Figure 1 This utility model provides an intelligent interconnected refrigerated dryer, including a refrigerated dryer heat exchanger 7, a gas-liquid separator, a variable frequency refrigeration compressor 1, an oil separator 3, an air-cooled and water-cooled condenser 4, a high-pressure liquid storage tank 13, and a liquid pipeline filter 5. The air-cooled and water-cooled condenser 4 is equipped with a fan 17, a cooling water outlet, and a cooling water inlet. The cooling water outlet is equipped with a water flow regulating valve 12. The refrigerated dryer heat exchanger 7 is connected to the gas-liquid separator, the gas-liquid separator is connected to the variable frequency refrigeration compressor 1, the variable frequency refrigeration compressor 1 is connected to the oil separator 3, the oil separator 3 is connected to the air-cooled and water-cooled condenser 4, the air-cooled and water-cooled condenser 4 is connected to the high-pressure liquid storage tank 13, the high-pressure liquid storage tank 13 is connected to the liquid pipeline filter 5, and the liquid pipeline filter 5 is connected to the refrigerated dryer heat exchanger 7.

[0016] In this embodiment, the heat exchanger 7 of the refrigerated dryer realizes heat exchange between compressed air and refrigerant; the gas-liquid separator effectively separates gaseous and liquid refrigerant, ensuring stable operation of subsequent stages; the variable frequency refrigeration compressor 1 can flexibly adjust its operating frequency according to the load, saving energy; the oil separator 3 separates the lubricating oil carried in the refrigerant and returns it to the compressor suction port, reducing equipment wear; the air-cooled and water-cooled condenser 4 regulates heat dissipation through the fan 17 and cooling water, ensuring efficient liquefaction of the refrigerant; the high-pressure liquid storage tank 13 stores liquid refrigerant, ensuring stable liquid supply to the system; and the liquid pipeline filter 5 filters impurities, improving the purity of the refrigerant. The entire system works collaboratively, realizing intelligent joint control of equipment under high flow conditions, solving the problems of high labor costs, management difficulties, large footprint, and difficulty in expansion caused by the independent operation of multiple traditional refrigerated dryers.

[0017] Furthermore, the refrigerated dryer heat exchanger 7 is equipped with a zero-air-consumption drainer 8, a refrigerated dry air temperature sensor 14, an air inlet 15, and an air outlet 16.

[0018] In this embodiment, the zero-air-consumption drainer 8 can discharge condensate in a timely manner without additional energy consumption, thus reducing operating costs; the cold dry air temperature sensor 14 can monitor the temperature of the discharged cold dry air in real time, providing data support for precise system control and ensuring stable drying effect; the air inlet 15 and air outlet 16 clearly define the entry and exit paths of compressed air, making airflow smoother and reducing pressure loss.

[0019] Furthermore, the oil separator 3 is connected to the variable frequency refrigeration compressor 1 via an oil pipeline and is located at the suction port of the variable frequency refrigeration compressor 1.

[0020] In this embodiment, the design of the intake port allows the separated lubricating oil to return to the compressor quickly and smoothly, ensuring that the compressor always has sufficient lubrication during operation. This effectively reduces equipment wear and failures caused by insufficient lubrication and extends the service life of the compressor.

[0021] Furthermore, a thermal expansion valve 6 is provided at the connection between the liquid pipeline filter 5 and the refrigerated dryer heat exchanger 7, and a hot gas bypass pipeline solenoid valve 11 is provided between the oil separator 3 and the thermal expansion valve 6.

[0022] In this embodiment, the thermostatic expansion valve 6 can automatically adjust its opening according to the superheat of the refrigerant, precisely controlling the refrigerant flow rate into the heat exchanger 7 of the refrigerated dryer. This allows the refrigerant to fully absorb the heat from the compressed air in the evaporation section, achieving efficient heat exchange and thus improving the drying effect and energy utilization. Meanwhile, the hot gas bypass pipeline solenoid valve 11 functions when the refrigerated dryer is under low load. When the parameter value uploaded by the refrigerant suction pressure sensor 9 is lower than the set value, some high-temperature, high-pressure gaseous refrigerant is directly connected to the outlet of the thermostatic expansion valve 6 through this solenoid valve, preventing the refrigerant evaporation temperature from further decreasing and preventing "ice blockage" inside the heat exchanger 7 of the refrigerated dryer. This ensures stable operation of the equipment under low load conditions and improves the reliability and adaptability of the equipment.

[0023] Furthermore, a refrigerant discharge pressure sensor 10 is provided at the connection between the oil separator 3 and the variable frequency refrigeration compressor 1, and a refrigerant suction pressure sensor 9 is provided at the connection between the gas-liquid separator and the variable frequency refrigeration compressor 1.

[0024] In this embodiment, the refrigerant discharge pressure sensor 10 monitors the refrigerant pressure discharged from the compressor in real time. When the pressure exceeds the upper limit setting, the control system alarms and stops the operation of the variable frequency refrigeration compressor 1 to prevent equipment damage due to excessive pressure and ensure equipment safety. The refrigerant suction pressure sensor 9 monitors the refrigerant pressure entering the compressor. When the pressure falls below the lower limit setting, the control system also alarms and stops the compressor to prevent malfunctions caused by abnormally low pressure operation. Simultaneously, the parameters uploaded by these two sensors are also used to adjust the operating frequency of the variable frequency refrigeration compressor 1 and the condensing pressure of the refrigeration system, enabling the equipment to automatically adjust its operating status according to the actual load, achieving more precise control and further improving energy utilization and overall equipment performance.

[0025] In this invention, the air flow is as follows: High-temperature and high-humidity compressed air enters the heat exchanger 7 of the single-module refrigerated dryer through the main intake pipe. It first exchanges heat with cooling air in the pre-cooling section to reduce its temperature, then enters the evaporation section to exchange heat with refrigerant to further reduce its temperature and condensate. The condensate is then discharged from the refrigerated dryer through the zero-air-consumption drainer 8 in the gas-water separation section. The cooled compressed air that has discharged condensate enters the pre-cooling section to exchange heat with the inlet air to increase its temperature, and finally exits the refrigerated dryer.

[0026] In this invention, the refrigeration process is as follows: After heat exchange and heating in the evaporation section of the refrigerated dryer heat exchanger 7, the refrigerant becomes gaseous and first enters the gas-liquid separator to separate the liquid refrigerant from the gaseous refrigerant before entering the suction port of the variable frequency refrigeration compressor 1. After being pressurized and heated in the compressor, the gaseous refrigerant is discharged from the compressor exhaust port and then enters the oil separator 3 to separate the lubricating oil carried in the gaseous refrigerant. The lubricating oil is then returned to the suction port of the variable frequency refrigeration compressor 1 through the oil pipeline. The high-temperature and high-pressure gaseous refrigerant from the oil separator 3 enters the air-cooled and water-cooled condenser 4 for heat dissipation and cooling, and becomes liquid refrigerant. Then, it passes through the high-pressure liquid storage tank 13 (at this time, the air-cooled and water-cooled condenser 4 is in an air-cooled state) and the liquid pipeline filter 5 before entering the thermal expansion valve 6. Here, the liquid refrigerant is throttled and depressurized, becoming a gas / liquid mixture, and then enters the evaporation section of the refrigerated dryer heat exchanger 7 to cool the compressed air.

[0027] In this utility model, the control logic is as follows:

[0028] ① Single-module refrigerated dryer: The single-module refrigerated dryer adopts a PLC intelligent control system, which can automatically adjust the operating status of the variable frequency refrigeration compressor 1 according to the air load, thereby significantly saving energy consumption; it adjusts the operating frequency of the variable frequency refrigeration compressor 1 according to the parameter value uploaded by the refrigerant suction pressure sensor 9, providing the required cooling capacity for the operation of the refrigerated dryer while effectively saving energy consumption; when the operating load of the refrigerated dryer is too low, the parameter value uploaded by the refrigerant suction pressure sensor 9 will be lower than the set value, and part of the high-temperature and high-pressure gaseous refrigerant from the oil separator 3 will be directly connected to the outlet of the thermal expansion valve 6 through the hot gas bypass pipeline solenoid valve 11, preventing the refrigerant evaporation temperature from decreasing further and preventing the "ice blockage" phenomenon inside the heat exchanger 7 of the refrigerated dryer; in the water-cooled refrigerated dryer, the part installed at the cooling water outlet... The water flow regulating valve 12 is used to adjust the condensing pressure of the refrigeration system, so that the refrigerated dryer operates in a suitable state. In the air-cooled refrigerated dryer, the parameter value uploaded by the refrigerant exhaust pressure sensor 10 is used to regulate the condensing pressure of the refrigeration system. When the uploaded parameter value exceeds the upper limit setting value, the fan 17 of the air-cooled and water-cooled condenser 4 is turned on. When the uploaded parameter value is lower than the lower limit setting value, the fan 17 is turned off. The safe operation function of the refrigerated dryer is achieved by monitoring the parameter values ​​uploaded by the refrigerant suction pressure sensor 9 and the refrigerant exhaust pressure sensor 10. When the refrigerant suction pressure in the refrigeration system is lower than the lower limit setting value, the control system alarms and stops the operation of the variable frequency refrigeration compressor 1. When the refrigerant exhaust pressure in the refrigeration system is higher than the upper limit setting value, the control system alarms and stops the operation of the variable frequency refrigeration compressor 1.

[0029] ② Modular Refrigerated Dryer: The modular refrigerated dryer controls the opening and closing of modules through individual module operating parameters. When the average airflow pressure difference of the refrigerated dryer modules is greater than the upper limit, one set of refrigerated dryer modules is activated. When the average airflow pressure difference of the refrigerated dryer modules is greater than the lower limit but less than the upper limit, the original number of modules in operation is maintained. When the average airflow pressure difference of the refrigerated dryer modules is less than the lower limit, one set of refrigerated dryer modules is deactivated. When the average refrigerated drying temperature of the refrigerated dryer modules is greater than the upper limit, one set of refrigerated dryer modules is activated. When the average refrigerated drying temperature of the refrigerated dryer modules is greater than the lower limit but less than the upper limit, the original number of modules in operation is maintained. When the average refrigerated drying temperature of the refrigerated dryer modules is less than the lower lower limit, one set of refrigerated dryer modules is deactivated. If the airflow differential pressure control requires one refrigerated air dryer module to be activated, and the refrigerated air drying temperature control also requires one refrigerated air dryer module to be activated, then one refrigerated air dryer module will be activated. Alternatively, if the airflow differential pressure control requires one refrigerated air dryer module to be activated, and the refrigerated air drying temperature control requires maintaining the number of operating modules, then one refrigerated air dryer module will be activated. If the airflow differential pressure control requires one refrigerated air dryer module to be activated, and the refrigerated air drying temperature control requires one refrigerated air dryer module to be deactivated, then one refrigerated air dryer module will be activated. If the airflow differential pressure control requires maintaining the number of operating modules, and the refrigerated air drying temperature control requires one refrigerated air dryer module to be activated, then one refrigerated air dryer module will be activated. If the control requires maintaining the number of operating modules, then maintain the number of operating modules; if the airflow differential pressure control requires maintaining the number of operating modules, and the refrigerated drying temperature control requires shutting down one refrigerated drying module, then maintain the number of operating modules; if the airflow differential pressure control requires shutting down one refrigerated drying module, and the refrigerated drying temperature control requires turning on one refrigerated drying module, then turn on one refrigerated drying module; if the airflow differential pressure control requires shutting down one refrigerated drying module, and the refrigerated drying temperature control requires maintaining the number of operating modules, then maintain the number of operating modules; if the airflow differential pressure control requires shutting down one refrigerated drying module, and the refrigerated drying temperature control requires shutting down one refrigerated drying module, then shut down one refrigerated drying module.

[0030] In this invention, the operating status of each refrigerated air dryer module is individually adjusted by its corresponding control cabinet, and the start and stop of each module is determined by the main control cabinet based on feedback from parameters such as airflow pressure difference and refrigeration temperature; wide frequency conversion coverage means that individual refrigerated air dryer modules can be frequency-adjusted, and the entire module refrigerated air dryer can adapt to various load variations by starting and stopping its modules; intelligent interconnection means that when the compressed air flow rate varies greatly, the refrigerated air dryer can automatically start and stop the modules based on parameters such as airflow pressure difference and refrigeration temperature, precisely matching the compressor power consumption corresponding to the refrigerated air dryer load, without the need for manual switching of the refrigerated air dryer; energy saving is achieved through… When the compressed air flow rate exceeds the inverter range of the refrigerated air dryer, one of the refrigerated air dryer modules automatically starts and stops. The load range of the refrigerated air dryer is always within the inverter range of the module. The compressor operating frequency is automatically adjusted according to the required cooling capacity, maximizing the utilization rate of the compressor's cooling capacity and thus reducing compressor power consumption. Refrigerated air dryer modules can be quickly added. The modules are quickly connected to the circuit via aviation plugs, requiring no professional electrician and enabling simple and rapid capacity expansion. Refrigerated air dryer modules can operate independently. If one module fails, it will not affect the operation of other modules, and they can be repaired independently.

[0031] In this invention, a pneumatic butterfly valve, temperature and pressure sensors are installed at the inlet of the refrigerated dryer. The sensor parameters are monitored and fed back to the PLC to control the opening and closing of the valve and the start and stop of the refrigerated dryer. When the inlet parameters of the refrigerated dryer reach the set value, the pneumatic butterfly valve opens and the refrigerated dryer runs automatically. When the inlet parameters of the air are lower than the set value, the pneumatic butterfly valve closes and the refrigerated dryer stops running, without the need for manual operation.

[0032] In this utility model, the design adopts standardized pipeline interfaces, and the components of each module are universal. The modules are fixed to the support by bolts. The assembly between modules and between modules and the whole machine is simple and uniform, and can be easily disassembled. The circuit wiring between the refrigerated dryer modules adopts aviation plugs, which do not require professional electrical knowledge and can realize simple and quick expansion of the refrigerated dryer.

[0033] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.

Claims

1. A smart, interconnected, refrigerated dryer, characterized in that, The system includes a refrigerated dryer heat exchanger, a gas-liquid separator, a variable frequency refrigeration compressor, an oil separator, an air-cooled and water-cooled condenser, a high-pressure liquid storage tank, and a liquid pipeline filter. The air-cooled and water-cooled condenser is equipped with a fan, a cooling water outlet, and a cooling water inlet. The cooling water outlet is equipped with a water flow regulating valve. The refrigerated dryer heat exchanger is connected to the gas-liquid separator, the gas-liquid separator is connected to the variable frequency refrigeration compressor, the variable frequency refrigeration compressor is connected to the oil separator, the oil separator is connected to the air-cooled and water-cooled condenser, the air-cooled and water-cooled condenser is connected to the high-pressure liquid storage tank, the high-pressure liquid storage tank is connected to the liquid pipeline filter, and the liquid pipeline filter is connected to the refrigerated dryer heat exchanger.

2. The intelligent interconnected refrigerated dryer as described in claim 1, characterized in that, The refrigerated dryer heat exchanger is equipped with a zero-air-consumption drain, a refrigerated dry air temperature sensor, an air inlet, and an air outlet.

3. The intelligent interconnected refrigerated dryer as described in claim 2, characterized in that, The oil separator is connected to the variable frequency refrigeration compressor via an oil pipeline and is located at the suction port of the variable frequency refrigeration compressor.

4. The intelligent interconnected refrigerated dryer as described in claim 3, characterized in that, A thermal expansion valve is installed at the connection between the liquid pipeline filter and the heat exchanger of the refrigerated dryer, and a hot gas bypass pipeline solenoid valve is installed between the oil separator and the thermal expansion valve.

5. The intelligent interconnected refrigerated dryer as described in claim 4, characterized in that, A refrigerant discharge pressure sensor is installed at the connection between the oil separator and the variable frequency refrigeration compressor, and a refrigerant suction pressure sensor is installed at the connection between the gas-liquid separator and the variable frequency refrigeration compressor.

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