CN113091172A - Non-condensable gas discharging device of air conditioning system and control method - Google Patents
Non-condensable gas discharging device of air conditioning system and control method Download PDFInfo
- Publication number
- CN113091172A CN113091172A CN202110448244.6A CN202110448244A CN113091172A CN 113091172 A CN113091172 A CN 113091172A CN 202110448244 A CN202110448244 A CN 202110448244A CN 113091172 A CN113091172 A CN 113091172A
- Authority
- CN
- China
- Prior art keywords
- storage tank
- liquid
- pressure
- pipe
- condensable gas
- 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.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
-
- 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
- F25B39/04—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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/006—Accumulators
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a non-condensable gas discharging device of an air conditioning system, which comprises a compressor, a condenser, a throttling device, a non-condensable gas storage tank, an electromagnetic control valve and a sleeve type gas-liquid separation liquid storage tank, wherein the sleeve type gas-liquid separation liquid storage tank comprises a gas-liquid mixture inlet pipe, a liquid refrigerant liquid discharge pipe and a non-condensable gas exhaust pipe, and the tail ends of the gas-liquid mixture inlet pipe and the liquid refrigerant liquid discharge pipe extend into the bottom of the sleeve type gas-liquid separation liquid storage tank; a high-pressure liquid pipe pipeline of the air conditioning system, the compressor, the condenser and a gas-liquid mixture inlet pipe of the sleeve type gas-liquid separation liquid storage tank are communicated through pipelines; the liquid refrigerant drain pipe is communicated with a high-pressure liquid pipe pipeline or a low-pressure air pipe pipeline of the air conditioning system; a temperature sensor and a pressure sensor are arranged at the non-condensable gas storage tank; the compressor also comprises a PID control module which is respectively electrically connected with the electromagnetic control valve, the compressor, the fan motor, the pressure sensor and the temperature sensor.
Description
Technical Field
The invention particularly relates to a non-condensable gas discharging device of an air conditioning system and a control method, and relates to the field of refrigerating unit equipment.
Background
The non-condensable gas is air, hydrogen, nitrogen, etc. mixed in the refrigerating system. These gases circulate in the system with the refrigerant, do not condense with the refrigerant, and do not produce a refrigeration effect. In a large refrigeration unit system, the pipeline of the refrigeration system is longer and air may still exist in the system due to insufficient vacuum degree for various reasons during production, installation and construction, and then non-condensable gas from the air can accumulate in the system.
The existence of non-condensable gas has great harm to the system, which mainly shows that the condensation pressure of the system is increased, the condensation temperature is increased, the exhaust temperature of a compressor is increased, the power consumption is increased, and the refrigeration efficiency is reduced; meanwhile, the excessive exhaust temperature can cause the carbonization of lubricating oil, influence the lubricating effect and damage the compressor in severe cases.
General removal methods: 1. before the refrigerating system is filled with refrigerant, the vacuum is completely pumped. 2. In the operation process of the refrigeration equipment, the phenomenon of increasing the quantity of non-condensable gas can also occur in the system, which is because when the refrigerant is filled and the lubricating oil is filled, the external air enters the system when the refrigerant is filled, or the air enters the system because of the imprecise tightness of the system. In this case, a non-condensable gas separator and a discharge valve may be added to the system to periodically or automatically discharge the non-condensable gas from the system. At present, the discharge is incomplete in a discharge mode through a non-condensable gas separator, and the conditions that the device is suitable for different air conditioning systems, the operation steps are complex and the like do not exist.
Disclosure of Invention
The invention aims to solve the technical problem of providing a non-condensable gas discharge device of an air conditioning system aiming at the defects of the prior art.
In order to achieve the purpose, the non-condensable gas discharging device of the air conditioning system comprises a compressor, a condenser, a throttling device, a non-condensable gas storage tank, an electromagnetic control valve and a sleeve type gas-liquid separation liquid storage tank, wherein the sleeve type gas-liquid separation liquid storage tank comprises a gas-liquid mixture inlet pipe, a liquid refrigerant discharge pipe and a non-condensable gas exhaust pipe; the tail ends of the gas-liquid mixture inlet pipe and the liquid refrigerant drain pipe extend into the bottom of the sleeve type gas-liquid separation liquid storage tank; the non-condensable gas exhaust pipe is positioned at the top in the tank body of the sleeve type gas-liquid separation liquid storage tank, and the tail end of the non-condensable gas exhaust pipe is not lower than the 1/20 position of the tank body of the sleeve type gas-liquid separation liquid storage tank; a high-pressure liquid pipe pipeline of the air conditioning system, the compressor, the condenser and a gas-liquid mixture inlet pipe of the sleeve type gas-liquid separation liquid storage tank are communicated through pipelines; the liquid refrigerant drain pipe is communicated with a high-pressure liquid pipe pipeline or a low-pressure air pipe pipeline of the air conditioning system; the non-condensable gas exhaust pipe is communicated with the non-condensable gas storage tank; a pressure sensor is arranged in the non-condensable gas storage tank, an electromagnetic control valve is arranged on the non-condensable gas discharge pipe, and a temperature sensor is arranged outside the non-condensable gas storage tank; the compressor also comprises a PID control module which is respectively electrically connected with the electromagnetic control valve, the compressor, the pressure sensor and the temperature sensor.
Further, a high-pressure liquid pipe pipeline of the air conditioning system is communicated with the compressor through an inner sleeve mixed gas pipeline; the inner sleeve is arranged in the sleeve type gas-liquid separation liquid storage tank; the shape of the inner sleeve is U-shaped.
The air conditioner further comprises a gas-liquid separation liquid storage tank, wherein a liquid inlet pipe and a gas outlet pipe of the gas-liquid separation liquid storage tank are respectively communicated with a high-pressure liquid pipe pipeline of the air conditioning system and an inlet of the compressor; and a liquid refrigerant drain pipe of the sleeve type gas-liquid separation liquid storage tank is communicated with a liquid return pipe of the gas-liquid separation liquid storage tank, and a liquid outlet pipe of the gas-liquid separation liquid storage tank is communicated with an evaporator of an air conditioning system.
Further, when the liquid refrigerant drain pipe is communicated with a high-pressure liquid pipe pipeline of the air conditioning system, the liquid refrigerant drain pipe also comprises a pressure relief pipe, the pressure relief pipe is communicated with the condenser and a low-pressure gas pipe pipeline of the air conditioning system, and an electromagnetic control valve is arranged on the pressure relief pipe.
Further, a condenser fan is arranged on the condenser and used for improving the heat exchange cooling efficiency of the condenser.
A control method of a non-condensable gas discharging device of an air conditioning system adopts the non-condensable gas discharging device of the air conditioning system, and comprises the following specific steps:
the method comprises the following steps: setting power-on initialization parameters, inputting an actual operation mode instruction, an exhaust operation mode or a vacuum-pumping mode to the PID control module through the input module;
step two: the PID control module starts a vacuumizing mode according to the collected vacuumizing instruction of the input module, outputs opening instructions to all electromagnetic control valves, opens all electromagnetic control valve passages and is vacuumized by an external vacuum pump;
step three: the PID control module starts an exhaust operation mode according to the collected exhaust operation instruction of the input module, starts a collection refrigerating unit starting detection module and a data information collection module, and displays the collected pressure values of the pressure sensors and the temperature values of the temperature sensors;
step four: the PID control module acquires the pressure value of a liquid pipe pressure sensor and the pressure value of an air pipe pressure sensor of the refrigerating unit in operation, and calculates a pressure difference value; if the actual pressure difference value is equal to a preset pressure difference value which meets the starting requirement of the exhaust device and the actual temperature value of the temperature sensor of the non-condensable gas storage tank is higher than zero, the PID control module outputs a starting instruction to the driving module so as to start the mixed gas inlet electromagnetic control valve, the mixed gas outlet electromagnetic control valve, the condenser fan and the compressor to start exhaust operation in sequence;
step five: the PID control module acquires a temperature value of an exhaust temperature sensor of the non-condensable gas storage tank and a pressure value of a pressure sensor of the non-condensable gas storage tank, and outputs an exhaust starting instruction to the driving module to open an exhaust electromagnetic control valve passage to exhaust non-condensable gas if the actual temperature value of the exhaust temperature sensor is higher than zero and the actual pressure value of the non-condensable gas storage tank rises to reach a preset pressure value;
step six: the PID control module acquires the temperature value of the exhaust temperature sensor of the non-condensable gas storage tank in real time and acquires the pressure value of the non-condensable gas storage tank in real time, and when the actual pressure value of the pressure sensor of the non-condensable gas storage tank is reduced to be lower than a preset pressure value, the PID control module inputs an exhaust stopping instruction to the driving module to close the exhaust electromagnetic control valve to stop exhausting;
step seven: the PID control module collects the temperature value of an exhaust temperature sensor of the non-condensable gas storage tank and the pressure value of a pressure sensor of the non-condensable gas storage tank in real time, and repeats the steps according to the change of the actual temperature value of the non-condensable gas storage tank and the actual pressure value of the non-condensable gas storage tank;
step eight: the PID control module acquires an actual temperature value of an exhaust temperature sensor of the non-condensable gas storage tank, inputs an operation stopping instruction to the driving module if the temperature value of the exhaust temperature sensor of the non-condensable gas storage tank is reduced to be lower than zero, sequentially closes the air inlet electromagnetic control valve, the compressor, the liquid outlet electromagnetic control valve, the exhaust electromagnetic control valve and the condenser fan, opens the pressure relief electromagnetic control valve to relieve pressure for ten seconds, and closes the pressure relief electromagnetic control valve after ten seconds;
step nine: the PID control module collects the actual temperature value of the exhaust temperature sensor of the non-condensable gas storage tank in real time, collects the pressure value of the pressure sensor of the non-condensable gas storage tank in real time, collects the pressure value of the liquid pipe pressure sensor of the refrigerating unit in real time and the pressure value of the gas pipe pressure sensor of the refrigerating unit in real time, meets three-minute delay starting protection of the compressor, and repeats the steps to control the operation exhaust and stop.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention can effectively discharge non-condensable gas from the refrigerating unit system, prevent the non-condensable gas from accumulating in the refrigerating unit system, thus being beneficial to maintaining the condensing pressure in the condenser of the air conditioning unit, ensuring the refrigerating capacity and energy efficiency of the refrigerating unit and ensuring the safe and efficient operation of the refrigerating unit.
2. The invention inputs the actual operation mode instruction, the exhaust operation mode or the vacuum pumping mode to the PID control module through the input module; the automatic operation of the control device can be automatically controlled by acquiring and comparing the values of the pressure sensor and the temperature sensor, so that the automatic operation exhaust function is realized, and the non-condensable gas protection unit can be timely exhausted; meanwhile, automatic processing is realized, and the labor intensity of technicians can be reduced.
3. The sleeve type gas-liquid separation liquid storage tank is also internally provided with an inner sleeve, so that low-temperature and low-pressure mixed gas passes through the tank body of the sleeve type gas-liquid separation liquid storage tank to exchange heat with a refrigerant in the sleeve type gas-liquid separation liquid storage tank, the supercooling degree of the mixed gas is improved, and the superheat degree of the mixed gas is improved.
4. The condenser fan arranged on the condenser of the invention is used for improving the heat exchange cooling efficiency of the condenser.
Drawings
FIG. 1 is a schematic view of the exhaust apparatus of the present invention;
FIG. 2 is a schematic view of the drain pipe of the present invention connected to a low pressure air pipe of an air conditioning system;
FIG. 3 is a schematic view of the connection of the drain of the present invention to a high pressure liquid line duct of an air conditioning system;
FIG. 4 is a schematic connection diagram of a refrigerant liquid discharge pipe connected to a gas-liquid separation tank when the gas-liquid separation tank is connected to a high-pressure liquid pipe of an air conditioning system;
FIG. 5 is a schematic connection diagram of a refrigerant drain pipe when a gas-liquid separation liquid storage tank is connected with a high-pressure liquid pipe pipeline of an air conditioning system and a low-pressure gas pipe pipeline of the air conditioning system;
FIG. 6 is a schematic diagram showing the connection of functional modules;
FIG. 7 is a schematic diagram of the connections of the devices;
FIG. 8 is a schematic view showing the structure of a gas-liquid separation reservoir;
FIG. 9 is a schematic view showing the structure of a double pipe type gas-liquid separation receiver.
In the figure: 1. a gas-liquid separation liquid storage tank; 2. a compressor; 3. a condenser; 4. a throttling device; 5. a condenser fan; 6. a sleeve type gas-liquid separation liquid storage tank; 7. a non-condensable gas storage tank; 8. an electromagnetic control valve; 9. a temperature sensor; 10. a pressure sensor; 11. and a PID control module.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "disposed," "mounted," "connected," "secured," "sleeved," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the two elements can be directly connected or indirectly connected through an intermediate medium, and the two elements can be communicated with each other or the two elements can interact with each other, so that the specific meaning of the terms in the invention can be understood according to specific situations by a person skilled in the art.
As shown in fig. 1 to 9, the non-condensable gas discharging device of the air conditioning system of the present embodiment includes a compressor 2, a condenser 3, a throttling device 4, a telescopic gas-liquid separation liquid storage tank 6, a non-condensable gas storage tank 7, and an electromagnetic control valve, where the telescopic gas-liquid separation liquid storage tank 6 includes a gas-liquid mixture inlet pipe, a liquid refrigerant discharge pipe, and a non-condensable gas exhaust pipe, ends of the gas-liquid mixture inlet pipe and the liquid refrigerant discharge pipe extend into a bottom of the telescopic gas-liquid separation liquid storage tank 6, and an end of the non-condensable gas exhaust pipe is disposed at a position close to a top inside the tank body and at a position which is at most not lower than a top 1/20 inside the tank; a high-pressure liquid pipe pipeline of the air conditioning system, the compressor 2, the condenser 3 and a gas-liquid mixture inlet pipe of the sleeve type gas-liquid separation liquid storage tank 6 are communicated through pipelines; the liquid refrigerant drain pipe is communicated with a high-pressure liquid pipe pipeline or a low-pressure air pipe pipeline of the air conditioning system; the non-condensable gas exhaust pipe is communicated with a non-condensable gas storage tank 7; a pressure sensor 10 is arranged in the non-condensable gas storage tank 7 and used for monitoring the pressure in the tank, and the exhaust is started only when the pressure value in the tank reaches a set value; an electromagnetic control valve 8 is arranged on the non-condensable gas discharge pipe, a temperature sensor 9 is arranged outside the non-condensable gas storage tank 7, and when the non-condensable gas is only discharged from the non-condensable gas storage tank 7, the temperature cannot be reduced; when the non-condensable gas is exhausted and a refrigerant is exhausted, the temperature of the tank body is reduced, the temperature sensor 9 transmits the fed back information to the PID control module 11, and the PID control module 11 controls the exhaust electromagnetic control valve 8 to be closed; the compressor also comprises a PID control module 11, wherein the PID control module 11 is respectively electrically connected with the electromagnetic control valve 8, the compressor 2, the fan motor 5, the pressure sensor 10 and the temperature sensor 9.
Preferably, a high-pressure liquid pipe pipeline of the air conditioning system is communicated with the compressor 2 through an inner sleeve mixed gas pipeline; the inner sleeve is arranged in the sleeve type gas-liquid separation liquid storage tank 6; the shape of the inner sleeve is U-shaped or S-shaped, so that low-temperature and low-pressure mixed gas passes through the tank body of the sleeve-type gas-liquid separation liquid storage tank 6 to exchange heat with the refrigerant in the sleeve-type gas-liquid separation liquid storage tank 6 to improve the supercooling degree and improve the superheat degree of the mixed gas, the refrigerant in the mixed gas is fully vaporized, the liquid refrigerant is prevented from entering the compressor 2, and the refrigerant in the sleeve-type gas-liquid separation liquid storage tank 6 is fully condensed and liquefied.
Preferably, a condensing and throttling device 4 is arranged on a liquid refrigerant drain pipe of the sleeve-type gas-liquid separation liquid storage tank 6 to lead out high-pressure liquid refrigerant in the sleeve-type gas-liquid separation liquid storage tank 6, the condensing and throttling device 4 is used for limiting the flow of the liquid refrigerant so that the pressure of the refrigerant and non-condensable gas in the condenser 3 and the sleeve-type gas-liquid separation liquid storage tank 6 keeps a high-pressure condensing state, and an outlet of the condensing and throttling device 4 is communicated with a liquid drainage electromagnetic control valve 8 so as to convey the liquid refrigerant to a refrigerating unit system through the electromagnetic control valve 8.
Preferably, the exhaust throttling device 4 is arranged on the non-condensable gas exhaust pipe of the sleeve-type gas-liquid separation liquid storage tank 6 so as to introduce the non-condensable gas in the sleeve-type gas-liquid separation liquid storage tank 6 into the non-condensable gas storage tank 7, the exhaust throttling device 4 is used for limiting the exhaust flow so as to enable the refrigerant and the non-condensable gas in the sleeve-type gas-liquid separation liquid storage tank 6 and the condenser 3 to keep a high-pressure condensation state, and the outlet of the exhaust throttling device 4 is communicated with the inlet of the non-condensable gas storage tank 7 so as to convey the non-condensable gas to the non-condensable gas storage tank 7.
Preferably, when the air conditioning system is provided with the gas-liquid separation liquid storage tank 1, the air conditioning system is specifically shown in fig. 3: when the liquid refrigerant drain pipe of the sleeve-type gas-liquid separation liquid storage tank 6 is communicated with the high-pressure liquid pipe pipeline of the air conditioning system, the system also comprises a pressure relief pipe which is communicated with the condenser 3 and the low-pressure gas pipe pipeline of the air conditioning system, and a pressure relief electromagnetic control valve 8 is arranged on the pressure relief pipe.
Preferably, referring to fig. 4 and 5 in particular, when the air conditioning system is not provided with a gas-liquid separation liquid storage tank, the device of the invention further comprises a gas-liquid separation liquid storage tank 1, wherein the tail end of a liquid inlet pipe of the gas-liquid separation liquid storage tank 1 extends to the bottom in the tank body, and the tail end of a gas outlet pipe is positioned at the upper part in the tank body; the liquid inlet pipe and the air outlet pipe are respectively communicated with a high-pressure liquid pipe pipeline of the air conditioning system and an inlet of the compressor 2, the liquid inlet pipe is provided with a pressure sensor 10, and the air outlet pipe is provided with a throttling device 4; the liquid refrigerant drain pipe of the sleeve-type gas-liquid separation liquid storage tank 6 is communicated with the liquid return pipe of the gas-liquid separation liquid storage tank 1, the refrigerant drain pipe of the sleeve-type gas-liquid separation liquid storage tank 6 is communicated with a high-pressure pipeline or a low-pressure pipeline of an air conditioning system (when the refrigerant drain pipe is communicated with the high-pressure pipeline of the air conditioning system, a pressure relief pipe needs to be arranged), and the bottom ends of the liquid drain pipe, the liquid inlet pipe and the liquid return pipe of the gas-liquid separation.
Preferably, the condenser 3 comprises a high-temperature high-pressure mixed gas inlet and a normal-temperature high-pressure gas-liquid mixture outlet, the inlet of the condenser 3 is communicated with the outlet of the compressor 2 and is used for introducing the high-temperature high-pressure mixed gas so as to carry out heat exchange cooling on the high-temperature high-pressure mixed gas in the condenser 3 to obtain a normal-temperature high-pressure gas-liquid mixture, and the outlet of the condenser 3 is used for conveying the normal-temperature high-pressure gas-liquid mixture to the gas-liquid double-; the condenser 3 is provided with a condenser fan 5, which functions to improve the cooling efficiency of the condenser 3.
The control method of the non-condensable gas discharge device of the air conditioning system comprises the following steps:
the method comprises the following steps: setting power-on initialization parameters, inputting an actual operation mode instruction, an exhaust operation mode or a vacuum-pumping mode to the PID control module 11 through an input module;
step two: the PID control module 11 starts a vacuumizing mode by the exhaust device according to the collected vacuumizing instruction of the input module, the PID control module 11 outputs opening instructions to all electromagnetic control valves, opens all electromagnetic control valve passages, and vacuumizes by an external vacuum pump;
step three: the PID control module 11 starts an exhaust operation mode according to the collected exhaust operation instruction of the input module, the PID control module 11 starts a collection refrigerating unit starting detection module and a data information collection module, and the collected pressure values of the pressure sensors 10 and the temperature values of the temperature sensors 9 are displayed;
step four: a pressure difference value is calculated by a pressure value of a liquid pipe pressure sensor 10 of the refrigerating unit and a pressure value of an air pipe pressure sensor 10 of the refrigerating unit which are in operation and acquired by a PID control module 11; if the actual pressure difference value is equal to a preset pressure difference value which meets the starting requirement of the exhaust device and the actual temperature value of the temperature sensor 9 of the non-condensable gas storage tank 7 is collected to be higher than zero, the PID control module 11 outputs a starting instruction to the driving module so as to start the mixed gas inlet electromagnetic control valve 8, the mixed gas outlet electromagnetic control valve 8, the condenser fan 5 and the compressor 2 to start exhaust operation in sequence;
step five: the PID control module 11 acquires a temperature value of an exhaust temperature sensor 9 of the non-condensable gas storage tank 7 and a pressure value of a pressure sensor 10 of the non-condensable gas storage tank 7, and if the actual temperature value of the exhaust temperature sensor 9 is higher than zero and the actual pressure value of the non-condensable gas storage tank 7 rises to reach a preset pressure value, the PID control module 11 outputs an exhaust starting instruction to the driving module to start an exhaust electromagnetic control valve 8 passage to exhaust non-condensable gas;
step six: the PID control module 11 collects the temperature value of an exhaust temperature sensor 9 of the non-condensable gas storage tank 7 in real time and collects the pressure value of the non-condensable gas storage tank 7 in real time, and when the actual pressure value of a pressure sensor 10 of the non-condensable gas storage tank 7 is lower than a preset pressure value, the PID control module 11 inputs an exhaust stopping instruction to the driving module to close the exhaust electromagnetic control valve 8 to stop exhausting;
step seven: the PID control module 11 collects the temperature value of an exhaust temperature sensor 9 of the non-condensable gas storage tank 7 and the pressure value of a pressure sensor 10 of the non-condensable gas storage tank 7 in real time, and repeats the steps according to the actual temperature value of the non-condensable gas storage tank 7 and the actual pressure value change of the non-condensable gas storage tank 7;
step eight: the PID control module 11 acquires an actual temperature value of an exhaust temperature sensor 9 of the non-condensable gas storage tank 7, if the temperature value of the exhaust temperature sensor 9 of the non-condensable gas storage tank 7 is reduced to be lower than zero, the PID control module 11 inputs an operation stopping instruction to the driving module, sequentially closes the air inlet electromagnetic control valve 8, the compressor 2, the liquid outlet electromagnetic control valve 8, the exhaust electromagnetic control valve 8 and the condenser fan 5, opens the pressure relief electromagnetic control valve 8 to relieve pressure for ten seconds, and closes the pressure relief electromagnetic control valve 8 after ten seconds;
step nine: the PID control module 11 collects the actual temperature value of the exhaust temperature sensor 9 of the non-condensable gas storage tank 7 in real time, collects the pressure value of the pressure sensor 10 of the non-condensable gas storage tank 7 in real time, collects the pressure value of the liquid pipe pressure sensor 10 of the refrigerating unit in real time and the pressure value of the gas pipe pressure sensor 10 of the refrigerating unit in real time, meets the requirement of 2-three-minute delay starting protection of the compressor, and repeats the steps to control the operation exhaust and stop.
The exhaust method of the present invention includes: the method comprises the following steps of (1) leading-out process, compression process, condensation process, separation process, liquid outlet process and exhaust process: the system gas-liquid separation liquid storage tank 1 is connected to a high-pressure liquid pipe system pipeline of the refrigerating unit, so that a refrigerant liquid pipe of an air conditioning system leads out mixed gas of gaseous refrigerant and non-condensable gas through the system gas-liquid separation liquid storage tank 1, the compressor 2 is used for compressing the mixed gas into high-temperature high-pressure mixed gas and sending the high-temperature high-pressure mixed gas to the condenser 3 for cooling, the condenser 3 is used for enabling the high-temperature high-pressure mixed gas to be subjected to heat exchange to enable the mixed gas to be cooled into liquid refrigerant and non-condensable gas, the liquid refrigerant and the non-condensable gas are sent to the sleeve type gas-liquid separation liquid storage tank 6 for gas-liquid separation, the sleeve type gas-liquid separation liquid storage tank 6 introduces the separated liquid refrigerant into a pipeline of the refrigerating unit system through the condensation throttling device 4, and the.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides an air conditioning system noncondensable gas eduction gear, includes compressor (2), condenser (3), throttling arrangement (4), noncondensable gas holding vessel (7) and solenoid electric valve (8), its characterized in that: the device also comprises a sleeve type gas-liquid separation liquid storage tank (6), wherein the sleeve type gas-liquid separation liquid storage tank (6) comprises a gas-liquid mixture inlet pipe, a liquid refrigerant liquid discharge pipe and a non-condensable gas exhaust pipe; the tail ends of the gas-liquid mixture inlet pipe and the liquid refrigerant drain pipe extend into the bottom of the sleeve type gas-liquid separation liquid storage tank (6); the non-condensable gas exhaust pipe is positioned at the top in the tank body of the sleeve type gas-liquid separation liquid storage tank (6), and the tail end of the non-condensable gas exhaust pipe is not lower than the position 1/20 of the tank body of the sleeve type gas-liquid separation liquid storage tank (6); a high-pressure liquid pipe pipeline of the air conditioning system, the compressor (2), the condenser (3) and a gas-liquid mixture inlet pipe of the sleeve type gas-liquid separation liquid storage tank (6) are communicated through pipelines; the liquid refrigerant drain pipe is communicated with a high-pressure liquid pipe pipeline or a low-pressure air pipe pipeline of the air conditioning system; the non-condensable gas exhaust pipe is communicated with the non-condensable gas storage tank (7); a pressure sensor (10) is arranged in the non-condensable gas storage tank (7), an electromagnetic control valve (8) is arranged on a non-condensable gas discharge pipe, and a temperature sensor (9) is arranged at the non-condensable gas storage tank (7); the compressor further comprises a PID control module (11), wherein the PID control module (11) is electrically connected with the control electromagnetic control valve (8), the compressor (2), the pressure sensor (10) and the temperature sensor (9) respectively.
2. An air conditioning system non-condensable gas discharging apparatus according to claim 1, wherein: a high-pressure liquid pipe pipeline of the air conditioning system is communicated with the compressor (2) through an inner sleeve mixed gas pipeline; the inner sleeve is arranged in the sleeve type gas-liquid separation liquid storage tank (6); the shape of the inner sleeve is U-shaped.
3. An air conditioning system non-condensable gas discharging apparatus according to claim 1, wherein: the air conditioner also comprises a gas-liquid separation liquid storage tank (1), wherein a liquid inlet pipe and a gas outlet pipe of the gas-liquid separation liquid storage tank (1) are respectively communicated with a high-pressure liquid pipe pipeline of the air conditioning system and an inlet of the compressor (2); and a liquid refrigerant liquid discharge pipe of the sleeve type gas-liquid separation liquid storage tank (6) is communicated with a liquid return pipe of the gas-liquid separation liquid storage tank (1), and a liquid outlet pipe of the gas-liquid separation liquid storage tank (1) is communicated with an evaporator of an air conditioning system.
4. An air conditioning system non-condensable gas discharging apparatus according to claim 1, wherein: when the liquid refrigerant drain pipe is communicated with a high-pressure liquid pipe pipeline of the air conditioning system, the liquid refrigerant drain pipe also comprises a pressure relief pipe, the pressure relief pipe is communicated with the condenser (3) and a low-pressure gas pipe pipeline of the air conditioning system, and an electromagnetic control valve (8) is arranged on the pressure relief pipe.
5. An air conditioning system non-condensable gas discharging apparatus according to claim 2, wherein: the condenser (3) is provided with a condenser fan (5) which is used for improving the heat exchange cooling efficiency of the condenser (3).
6. A control method of a non-condensable gas discharging device of an air conditioning system is characterized by comprising the following steps: the method for discharging the non-condensable gas in the air conditioning system according to claim 1 comprises the following steps:
the method comprises the following steps: setting power-on initialization parameters, inputting an actual operation mode instruction, an exhaust operation mode or a vacuum-pumping mode to the PID control module (11) through an input module;
step two: the PID control module (11) starts a vacuumizing mode according to the collected vacuumizing instruction of the input module, the PID control module (11) outputs opening instructions to all the electromagnetic control valves, all the electromagnetic control valve passages are opened, and an external vacuum pump vacuumizes;
step three: when the PID control module (11) acquires an exhaust operation instruction of the input module, the exhaust device starts an exhaust operation mode, the PID control module (11) starts an acquisition refrigeration unit starting detection module and a data information acquisition module, and the acquired pressure values of the pressure sensors (10) and the temperature values of the temperature sensors (9) are displayed;
step four: the pressure difference value is calculated by the pressure value of a liquid pipe pressure sensor (10) and the pressure value of a gas pipe pressure sensor (10) of the refrigerating unit which are in operation and acquired by a PID control module (11); if the actual pressure difference value is equal to a preset pressure difference value meeting the starting requirement of the exhaust device and the actual temperature value of the temperature sensor (9) of the non-condensable gas storage tank (7) is acquired to be higher than zero, the PID control module (11) outputs a starting instruction to the driving module so as to start the mixed gas inlet electromagnetic control valve (8), the liquid outlet electromagnetic control valve (8), the condenser fan (5) and the compressor (2) to start exhaust operation in sequence;
step five: the PID control module (11) collects the temperature value of an exhaust temperature sensor (9) of the non-condensable gas storage tank (7) and the pressure value of a pressure sensor (10) of the non-condensable gas storage tank (7), and if the actual temperature value of the exhaust temperature sensor (9) is higher than zero and the actual pressure value of the non-condensable gas storage tank (7) rises to reach a preset pressure value, the PID control module (11) outputs an exhaust starting instruction to the driving module to start an exhaust electromagnetic control valve (8) passage to exhaust non-condensable gas;
step six: the PID control module (11) collects the temperature value of an exhaust temperature sensor (9) of the non-condensable gas storage tank (7) in real time and collects the pressure value of the non-condensable gas storage tank (7) in real time, and when the actual pressure value of a pressure sensor (10) of the non-condensable gas storage tank (7) is reduced to be lower than a preset pressure value, the PID control module (11) inputs an exhaust stopping instruction to the driving module to close the exhaust electromagnetic control valve (8) to stop exhausting;
step seven: the PID control module (11) collects the temperature value of an exhaust temperature sensor (9) of the non-condensable gas storage tank (7) and the pressure value of a pressure sensor (10) of the non-condensable gas storage tank (7) in real time, and repeats the steps according to the actual temperature value of the non-condensable gas storage tank (7) and the actual pressure value change of the non-condensable gas storage tank (7);
step eight: the method comprises the following steps that a PID control module (11) acquires an actual temperature value of an exhaust temperature sensor (9) of a non-condensable gas storage tank (7), if the temperature value of the exhaust temperature sensor (9) of the non-condensable gas storage tank (7) is reduced to be lower than zero degree, the PID control module (11) inputs an operation stopping instruction to a driving module, an air inlet electromagnetic control valve (8), a compressor (2), a liquid outlet electromagnetic control valve (8), an exhaust electromagnetic control valve (8) and a condenser fan (5) are sequentially closed, the pressure relief electromagnetic control valve (8) is opened to relieve pressure for ten seconds, and the pressure relief electromagnetic control valve (8) is closed after ten seconds;
step nine: the PID control module (11) collects the actual temperature value of the exhaust temperature sensor (9) of the non-condensable gas storage tank (7) in real time, collects the pressure value of the pressure sensor (10) of the non-condensable gas storage tank (7) in real time, collects the pressure value of the liquid pipe pressure sensor (10) of the refrigerating unit and the pressure value of the air pipe pressure sensor (10) of the refrigerating unit in real time, meets the requirement of three-minute delay starting protection of the compressor (2), and repeats the steps to control the operation exhaust and stop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110448244.6A CN113091172A (en) | 2021-04-25 | 2021-04-25 | Non-condensable gas discharging device of air conditioning system and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110448244.6A CN113091172A (en) | 2021-04-25 | 2021-04-25 | Non-condensable gas discharging device of air conditioning system and control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113091172A true CN113091172A (en) | 2021-07-09 |
Family
ID=76680237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110448244.6A Pending CN113091172A (en) | 2021-04-25 | 2021-04-25 | Non-condensable gas discharging device of air conditioning system and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113091172A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114259827A (en) * | 2021-12-22 | 2022-04-01 | 北京华源泰盟节能设备有限公司 | Gas-liquid separation device |
| CN115435443A (en) * | 2022-08-24 | 2022-12-06 | 珠海格力电器股份有限公司 | Method and device for exhausting non-condensable gas in air conditioning system and air conditioning system |
-
2021
- 2021-04-25 CN CN202110448244.6A patent/CN113091172A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114259827A (en) * | 2021-12-22 | 2022-04-01 | 北京华源泰盟节能设备有限公司 | Gas-liquid separation device |
| CN115435443A (en) * | 2022-08-24 | 2022-12-06 | 珠海格力电器股份有限公司 | Method and device for exhausting non-condensable gas in air conditioning system and air conditioning system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113091172A (en) | Non-condensable gas discharging device of air conditioning system and control method | |
| CN108343600B (en) | Performance test board for compressor and use method | |
| CN102042724A (en) | Refrigerant control component, air-conditioning refrigeration system and refrigerant circulation control method | |
| CN209431713U (en) | System for preventing liquid impact | |
| US20210302085A1 (en) | Refrigerated container refrigeration system capable of preventing freezing of container door | |
| CN101514854A (en) | Energy-saving type high-temperature water chilling unit | |
| CN107449191B (en) | Air-conditioning system and its heat-production control method, device and machine readable storage medium | |
| CN112033080A (en) | Refrigeration house refrigeration system and refrigeration control method | |
| CN201615644U (en) | Air conditioner refrigerant circulating unit | |
| CN100575823C (en) | Multifunctional reclaiming machine | |
| CN106196761B (en) | Refrigeration cycle system and control method thereof | |
| CN218972935U (en) | Auxiliary oil return device for oil balance of double-full-closed screw compressor | |
| CN210248197U (en) | Cold accumulation type vacuum precooling system | |
| CN216868860U (en) | Open-type variable-frequency single-stage screw unit refrigerating system | |
| CN115854502A (en) | Oil return control method for starting multi-connected air conditioner low-temperature freezer | |
| CN115978751A (en) | Frequency conversion direct expansion machine | |
| CN210952082U (en) | Frequency conversion cold-dry machine | |
| CN206073492U (en) | Cold storage refrigerating system | |
| CN211552134U (en) | Ultralow temperature single-machine refrigeration heating temperature control system | |
| CN209042799U (en) | A kind of magnetic suspension centrifugation ice water unit | |
| CN217083004U (en) | Ice bottle production system | |
| CN112277988A (en) | Air conditioning unit for railway vehicle and control method | |
| CN219222888U (en) | Cooling system of high-low temperature testing machine | |
| CN201222682Y (en) | Cooling device for motor and motor using the same | |
| CN218915501U (en) | Vacuum precooler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210709 |
|
| WD01 | Invention patent application deemed withdrawn after publication |