CN110260436B - Air conditioning system and air conditioning system control method - Google Patents
Air conditioning system and air conditioning system control method Download PDFInfo
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- CN110260436B CN110260436B CN201910622882.8A CN201910622882A CN110260436B CN 110260436 B CN110260436 B CN 110260436B CN 201910622882 A CN201910622882 A CN 201910622882A CN 110260436 B CN110260436 B CN 110260436B
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- 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
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- 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
- F24F13/30—Arrangement or mounting of heat-exchangers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to an air conditioning system and a control method of the air conditioning system, wherein the air conditioning system comprises an outdoor unit, an indoor unit and a purifying device, a refrigerant pipeline is communicated between an outdoor heat exchanger of the outdoor unit and an indoor heat exchanger of the indoor unit, a purifying liquid outlet and a purifying liquid return port are arranged on the refrigerant pipeline, the purifying liquid outlet is positioned on one side of the purifying liquid return port, which is close to the indoor heat exchanger, an input port of the purifying device is communicated with the purifying liquid outlet, an output port of the purifying device is communicated with the purifying liquid return port, a main valve is arranged on the refrigerant pipeline, and the main valve is positioned between the purifying liquid outlet and the purifying liquid return port. When the air conditioning system is in a heating process and the existence of the dew point of the refrigerant cannot be detected, the purity of the refrigerant participating in circulation in the air conditioning system can be effectively ensured, and therefore the service life of a compressor of the unit and the safety of the unit are ensured.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to an air conditioning system and an air conditioning system control method.
Background
The refrigerating and heating processes of the air conditioning system are mainly realized through the circulation of the refrigerant in the system and the change of the state of the refrigerant. After long-time use, the dew point of the refrigerant exists in the air conditioning system, and the refrigerant is led out in the refrigeration process. Therefore, a refrigerant leakage detection device is further arranged in the air conditioning system to detect the occurrence of a dew point and prevent the refrigerant from leaking.
However, in the heating process of the air conditioning system, the temperature of the refrigerant is reduced after heat exchange of the indoor unit, and under certain low temperature conditions, the saturation pressure of certain types of refrigerant is smaller than the standard atmospheric pressure, so that the refrigerant cannot leak. For example, at-25 ℃, the saturation pressure of the R134 refrigerant is less than the standard atmospheric pressure. Therefore, the detection device for detecting refrigerant leakage in the system cannot detect the existence of the dew point, the operation safety of an air conditioning system cannot be guaranteed, and the service life of a compressor of a unit is influenced.
Disclosure of Invention
Based on this, it is necessary to provide an air conditioning system and an air conditioning system control method to ensure the life of a compressor of a unit and the safety of the unit.
The utility model provides an air conditioning system, includes off-premises station, indoor set and purification device, the off-premises station the outdoor heat exchanger with the intercommunication has the refrigerant pipeline between the indoor heat exchanger of indoor set, be equipped with purification liquid outlet and purification liquid return port on the refrigerant pipeline, the purification liquid outlet is located purification liquid return port is close to one side of indoor heat exchanger, purification device's input port with purification liquid outlet intercommunication, purification device's output port with purification liquid return port intercommunication, be equipped with the main valve on the refrigerant pipeline, the main valve is located purification liquid outlet with between the purification liquid return port.
The above scheme provides an air conditioning system, through further setting up on the refrigerant pipeline purification device for when air conditioning system heats the in-process, when unable detection refrigerant dew point exists, can pass through closing the main valve, make refrigerant in the refrigerant pipeline follow purification liquid outlet gets into purification device purifies, will air in the refrigerant is discharged, and the refrigerant through purification flows back from the purification liquid return port again the refrigerant pipeline participates in the refrigerant circulation heats the in-process. Therefore, the purity of the refrigerant participating in circulation in the air conditioning system is effectively ensured, and the service life of a compressor of the unit and the safety of the unit are ensured.
In one embodiment, the purification device comprises an adjusting tank and a heat exchanger, wherein a purification liquid inlet pipe is communicated between a liquid inlet of the adjusting tank and the purification liquid outlet, a purification liquid outlet pipe is communicated between a liquid outlet of the adjusting tank and the purification liquid return port, and the heat exchanger is arranged on the purification liquid inlet pipe and is used for cooling the refrigerant in the purification liquid inlet pipe.
In one embodiment, the regulating tank is further provided with an exhaust port, the exhaust port is provided with an exhaust pipeline, and the exhaust pipeline is provided with an exhaust valve.
In one embodiment, a pipeline between the compressor of the outdoor unit and the four-way valve of the outdoor unit is a high-pressure pipe, one end, far away from the adjusting tank, of the exhaust pipeline is communicated with the high-pressure pipe, a pressurizing valve is arranged on the exhaust pipeline, and the pressurizing valve is located on one side, far away from the adjusting tank, of the exhaust valve.
In one embodiment, the air conditioning system further comprises a heat exchange pipeline for circulating the refrigerating fluid, the heat exchanger is a plate heat exchanger, a first flow passage of the plate heat exchanger is communicated with the purification liquid inlet pipe, and a second flow passage of the plate heat exchanger is communicated with the heat exchange pipeline.
In one embodiment, the inlet end of the heat exchange pipeline is provided with a water inlet valve, and the outlet end of the heat exchange pipeline is provided with a water outlet valve.
In one embodiment, the purification liquid inlet pipe is provided with a liquid inlet valve, the liquid inlet valve is positioned at one side of the heat exchanger close to the purification liquid outlet, and the purification liquid outlet pipe is provided with a liquid outlet valve.
In one embodiment, the air conditioning system further comprises an unloading pipeline, one end of the unloading pipeline is communicated with the purification liquid inlet pipe, the other end of the unloading pipeline is communicated with the refrigerant pipeline, an unloading valve is arranged on the unloading pipeline, and the position, communicated with the unloading pipeline, of the refrigerant pipeline is located on one side, far away from the purification liquid outlet, of the main valve.
In one embodiment, the air conditioning system further includes a pressure detecting assembly for detecting an evaporation pressure and a condensation pressure of the air conditioning system, and a temperature detecting assembly for detecting an indoor environment temperature and an exhaust temperature of a compressor of the outdoor unit, both of which are electrically connected with the main valve.
In one embodiment, the refrigerant pipeline is provided with a heating electronic expansion valve, and the heating electronic expansion valve is positioned at one side of the purification liquid return port, which is close to the outdoor heat exchanger.
The air conditioning system control method adopts the air conditioning system and further comprises the following steps:
when the air conditioning system executes a heating process, detecting whether air is mixed in a refrigerant of the air conditioning system;
if air is mixed in the refrigerant of the air conditioning system, the main valve is closed, and the refrigerant flowing from the indoor heat exchanger to the outdoor heat exchanger enters the purifying device to carry out the purifying process.
The above scheme provides a control method of an air conditioning system, in the heating process of the air conditioning system, the refrigerant in the indoor heat exchanger exchanges heat, the temperature is reduced, and when the temperature is reduced to a certain degree, the saturation pressure of certain types of refrigerant (such as R134 refrigerant) is smaller than the standard atmospheric pressure. If the refrigerant dew point exists in the air conditioning system, the refrigerant cannot leak out at the moment, and air can enter the air conditioning system, so that the refrigerant is mixed with air, and the service life of a compressor of the unit and the safety and reliability of the operation of the unit are affected. When detecting that air is mixed in the refrigerant of the air conditioning system, a main valve in the air conditioning system is closed, so that the refrigerant in the refrigerant pipeline enters the purification device for purification, and the purified refrigerant returns to the refrigerant circulation process of heating in the air conditioning system from the purification liquid return port. The purity of the refrigerant in the air conditioning system is effectively guaranteed, and therefore the service life of the compressor of the unit and the safety of the unit are guaranteed.
Drawings
Fig. 1 is a system diagram of an air conditioning system according to the present embodiment.
Reference numerals illustrate:
10. the air conditioning system comprises an air conditioning system, 11, an outdoor unit, 111, an outdoor heat exchanger, 112, a gas-liquid separator, 113, an oil separator, 12, an indoor unit, 121, an indoor heat exchanger, 13, a purifying device, 131, a regulating tank, 1311, an exhaust pipeline, 1312, an exhaust valve, 1313, a pressurizing valve, 132, a heat exchanger, 133, a purifying liquid inlet pipe, 1331, a liquid inlet valve, 134, a purifying liquid outlet pipe, 1341, a liquid outlet valve, 135, a heat exchange pipeline, 1351, a water inlet valve, 1352, a water outlet valve, 14, a refrigerant pipeline, 141, a main valve, 15, a compressor, 16, a four-way valve, 17, a high-pressure pipe, 18, an unloading pipeline, 181, an unloading valve, 19 and a hot electron expansion valve.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the invention, which is therefore not limited to the specific embodiments disclosed below.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
As shown in fig. 1, in one embodiment, an air conditioning system 10 is provided, including an outdoor unit 11, an indoor unit 12, and a purification apparatus 13. The outdoor heat exchanger 111 of the outdoor unit 11 is communicated with the indoor heat exchanger 121 of the indoor unit 12, a purification liquid outlet and a purification liquid return port are arranged on the refrigerant pipeline 14, the purification liquid outlet is positioned on one side, close to the indoor heat exchanger 121, of the purification liquid return port, an input port of the purification device 13 is communicated with the purification liquid outlet, an output port of the purification device 13 is communicated with the purification liquid return port, a main valve 141 is arranged on the refrigerant pipeline 14, and the main valve 141 is positioned between the purification liquid outlet and the purification liquid return port.
In the heating process of the air conditioning system 10, after the indoor heat exchanger 121 of the indoor unit 12 exchanges heat, the temperature of the refrigerant is reduced, and the saturation pressure of some types of refrigerants (for example, R134 refrigerant) is smaller than the standard atmospheric pressure. Even if the dew point of the refrigerant exists in the air conditioning system 10, the refrigerant cannot leak, but air can enter the air conditioning system 10 through the dew point to be mixed with the refrigerant, so that the operation safety of the air conditioning system 10 is affected, and the service life of the unit compressor 15 is affected.
In the above-mentioned solution, by further disposing the purifying device 13 on the refrigerant pipeline 14, when the air conditioning system 10 heats, the main valve 141 is closed, so that the refrigerant flowing into the refrigerant pipeline 14 from the indoor heat exchanger 121 may further enter the purifying device 13 from the purifying liquid outlet to purify, the air in the refrigerant is discharged, and the purified refrigerant flows back to the refrigerant pipeline 14 from the purifying liquid return outlet to participate in the refrigerant circulation heating process in the air conditioning system 10. The purity of the refrigerant participating in circulation in the air conditioning system 10 is effectively ensured, so that the service life of the unit compressor 15 and the safety of the unit are ensured.
In particular, the method for determining the purity of the refrigerant in the air conditioning system 10 may be varied, for example, by detecting data such as the evaporating pressure, the condensing pressure, the ambient temperature, and the exhaust temperature in the air conditioning system 10, and determining whether the refrigerant is mixed with air. If the judging result shows that air is mixed in the refrigerant, the main valve 141 in the air conditioning system 10 may be closed, so that the refrigerant in the refrigerant pipe 14 enters the purifying device 13 to be purified, and the air in the refrigerant is removed.
Of course, alternatively, the purifying treatment may be performed on the refrigerant in the air conditioning system 10 periodically, without supporting the detection data, and when the predetermined time is reached, the main valve 141 is closed, so as to control the refrigerant in the refrigerant pipe 14 to enter the purifying device 13 for purifying.
More specifically, in one embodiment, as shown in fig. 1, the purifying device 13 includes an adjusting tank 131 and a heat exchanger 132, a purifying liquid inlet pipe 133 is connected between a liquid inlet of the adjusting tank 131 and the purifying liquid outlet, a purifying liquid outlet pipe 134 is connected between a liquid outlet of the adjusting tank 131 and the purifying liquid return port, and the heat exchanger 132 is disposed on the purifying liquid inlet pipe 133 and is used for cooling the refrigerant in the purifying liquid inlet pipe 133.
During the use process, the refrigerant in the refrigerant pipeline 14 enters the purification liquid inlet pipe 133 from the purification liquid outlet, the refrigerant passes through the heat exchanger 132 during the flow process of the purification liquid inlet pipe 133, and is cooled in the heat exchanger 132, so that the gaseous refrigerant or the mixed state refrigerant is cooled into the liquid refrigerant, and the air is still in the gaseous state, thereby separating the refrigerant from the air. The separated liquid refrigerant and gaseous air enter the conditioning tank 131 through the purification feed tube 133. In the adjusting tank 131, the liquid refrigerant is separated from the gaseous air, and the liquid refrigerant is discharged from the liquid outlet into the purifying liquid discharge pipe 134, and finally flows back into the refrigerant pipeline 14 from the purifying liquid return port, thereby participating in the refrigerant circulation process. And gaseous air may be stored in the conditioning tank 131 or may be discharged into the atmosphere from an exhaust port of the conditioning tank 131.
For example, in one embodiment, as shown in fig. 1, the conditioning tank 131 is further provided with an exhaust port, and the exhaust port is provided with an exhaust pipe 1311, and the exhaust pipe 1311 is provided with an exhaust valve 1312.
The exhaust valve 1312 is opened when it is necessary to exhaust the air in the conditioning tank 131. In order to achieve a better purification effect, the liquid outlet of the adjusting tank 131 may be disposed at the bottom end and the air outlet may be disposed at the top end.
Further, in one embodiment, as shown in fig. 1, a pipeline between the compressor 15 of the outdoor unit 11 and the four-way valve 16 of the outdoor unit 11 is a high-pressure pipe 17, one end of the exhaust pipeline 1311 away from the adjusting tank 131 is communicated with the high-pressure pipe 17, a pressurization valve 1313 is disposed on the exhaust pipeline 1311, and the pressurization valve 1313 is located on one side of the exhaust valve 1312 away from the adjusting tank 131.
When the regulating tank 131 requires a large pressure during the draining process, the pressurizing valve 1313 may be opened, and the high pressure in the high pressure pipe 17 is used to assist the draining of the regulating tank 131.
Specifically, as shown in fig. 1, the other 3 oil ports of the four-way valve 16 are respectively communicated with the indoor heat exchanger 121, the outdoor heat exchanger 111, and the gas-liquid separator 112 of the outdoor unit 11. When the oil separator 113 is provided in the outdoor unit 11, the oil separator 113 is provided in the high-pressure pipe 17.
Further, in one embodiment, as shown in fig. 1, the purification liquid inlet pipe 133 is provided with a liquid inlet valve 1331, the liquid inlet valve 1331 is located at one side of the heat exchanger 132 near the purification liquid outlet, and the purification liquid outlet pipe 134 is provided with a liquid outlet valve 1341.
In the purifying process, the liquid inlet valve 1331 and the liquid outlet valve 1341 are opened, and the main valve 141 is closed, so that the refrigerant can enter the purifying device 13 for purification, and then can also return to the refrigerant pipeline 14 for refrigerant circulation.
When the air conditioning system 10 does not need to perform the refrigerant purifying process, if the amount of the refrigerant involved in the circulation is adjusted according to the data display, the liquid storage and draining processes can be achieved by adjusting the liquid inlet valve 1331 and the liquid draining valve 1341. Specifically, when the amount of refrigerant involved in the circulation in the air conditioning system 10 is excessive, the main valve 141 may be opened, the liquid inlet valve 1331 may be opened, and the liquid outlet valve 1341 may be closed. So that part of the refrigerant is stored in the conditioning tank 131 of the purification device 13. When the amount of the refrigerant involved in the circulation in the air conditioning system 10 is too small, the main valve 141 may be opened, the liquid inlet valve 1331 may be closed, and the liquid outlet valve 1341 may be opened, so that the refrigerant in the conditioning tank 131 may enter the refrigerant pipe 14 to participate in the refrigerant circulation process.
In the process of discharging the refrigerant in the adjustment tank 131 into the refrigerant pipe 14 through the purification drain pipe 134, if the pressure needs to be increased to power the discharge of the refrigerant in the adjustment tank 131, the pressurizing valve 1313 on the discharge pipe 1311 may be opened, and the high pressure in the high pressure pipe 17 may be used.
Of course, when the amount of the refrigerant involved in the circulation is adjusted, the heat exchange process of the heat exchanger 132 may be utilized, and the refrigerant purification treatment may be performed while the amount of the refrigerant is adjusted.
Specifically, the heat exchanger 132 for purification may be a plate heat exchanger 132, or another heat exchanger 132 having a heat exchanging function, which is not particularly limited herein.
For example, in one embodiment, as shown in fig. 1, the air conditioning system 10 further includes a heat exchange line 135 for circulating a refrigerant fluid, the heat exchanger 132 is a plate heat exchanger, a first flow passage of the plate heat exchanger is connected to the purification feed tube 133, and a second flow passage of the plate heat exchanger is connected to the heat exchange line 135.
Therefore, during the purification process, the refrigerant liquid flows through the heat exchange pipeline 135, and when the refrigerant liquid reaches the second flow passage of the plate heat exchanger, the refrigerant liquid in the second flow passage exchanges heat with the refrigerant in the first flow passage, so that the gaseous refrigerant or the mixed state refrigerant in the first flow passage is cooled into a liquid refrigerant, and the separation of the refrigerant and the gaseous air is realized.
Further, in one embodiment, as shown in fig. 1, the inlet end of the heat exchange pipeline 135 is provided with a water inlet valve 1351, and the outlet end of the heat exchange pipeline 135 is provided with a water outlet valve 1352.
When purification is required, the water inlet valve 1351 and the water outlet valve 1352 are opened, so that the refrigerant liquid can be circulated in the heat exchange pipeline 135. It should be noted that the refrigerant liquid flowing in from the inlet end can cool the refrigerant in the first flow passage to a liquid state, but the air is still in a gaseous state.
Further, in one embodiment, as shown in fig. 1, the air conditioning system 10 further includes an unloading pipeline 18, one end of the unloading pipeline 18 is communicated with the purification liquid inlet pipe 133, the other end of the unloading pipeline 18 is communicated with the refrigerant pipeline 14, an unloading valve 181 is disposed on the unloading pipeline 18, and a position on the refrigerant pipeline 14, which is communicated with the unloading pipeline 18, is located on a side of the main valve 141 away from the purification liquid outlet.
When the pressure in the regulating tank 131 is too high, the unloading valve 181 on the unloading pipeline 18 is opened, so as to protect the regulating tank 131.
Further, in one embodiment, the air conditioning system 10 further includes a pressure detecting component for detecting an evaporation pressure and a condensation pressure of the air conditioning system 10, and a temperature detecting component for detecting an indoor environment temperature and an exhaust temperature of the compressor 15 of the outdoor unit 11, both of which are electrically connected to the main valve 141.
The main valve 141 is closed when the data detected by the pressure detecting means and the data detected by the temperature detecting means indicate that the purifying process is required.
Further, when the air conditioning system 10 is provided with a liquid inlet valve 1331 and a liquid outlet valve 1341, the liquid inlet valve 1331 and the liquid outlet valve 1341 are electrically connected with the pressure detecting assembly and the temperature detecting assembly, and cooperate with the main valve 141 to perform the refrigerant purifying treatment according to the above-mentioned process.
Similarly, the water inlet valve 1351 and the water outlet valve 1352 may be electrically connected to the pressure detecting assembly and the temperature detecting assembly, and adjusted according to the foregoing steps, so as to implement the refrigerant purifying process.
Further, in one embodiment, as shown in fig. 1, the refrigerant pipeline 14 is provided with a thermal electron expansion valve 19, and the thermal electron expansion valve 19 is located at a side of the purification liquid return port close to the outdoor heat exchanger 111.
The refrigerant purified and returned to the refrigerant pipe 14 is throttled by the heating electronic expansion valve 19 and then enters the outdoor heat exchanger 111 of the outdoor unit 11.
Further, in another embodiment, there is provided a control method of an air conditioning system, adopting the air conditioning system 10, further comprising the steps of:
when the air conditioning system 10 executes a heating process, detecting whether air is mixed in a refrigerant of the air conditioning system 10;
when air is mixed in the refrigerant of the air conditioning system 10, the main valve 141 is closed, and the refrigerant flowing from the indoor heat exchanger 121 to the outdoor heat exchanger 111 enters the purifying device 13 to perform a purifying process.
The above solution provides a control method of an air conditioning system, in which the refrigerant in the indoor heat exchanger 121 exchanges heat during the heating process of the air conditioning system 10, the temperature is reduced, the saturation pressure of certain types of refrigerant (such as R134 refrigerant) is less than the standard atmospheric pressure, if the dew point of the refrigerant exists in the air conditioning system 10, the refrigerant will not leak out at this time, and air will enter the air conditioning system 10, so that the refrigerant is mixed with air, which affects the service life of the unit compressor 15 and the safety and reliability of the unit operation. When detecting that air is mixed in the refrigerant of the air conditioning system 10, the main valve 141 in the air conditioning system 10 is closed, so that the refrigerant in the refrigerant pipeline 14 enters the purifying device 13 for purification, and the purified refrigerant returns to the refrigerant circulation process of heating in the air conditioning system 10 from the purifying liquid return port. The purity of the refrigerant in the air conditioning system 10 is effectively ensured, so that the service life of the unit compressor 15 and the safety of the unit are ensured.
Further, when the air conditioning system 10 is provided with the liquid inlet valve 1331, the liquid outlet valve 1341, the water inlet valve 1351 and the water outlet valve 1352, the method for purifying the refrigerant of the air conditioning system 10 further comprises the following steps:
when the main valve 141 is closed, the liquid inlet valve 1331, the liquid outlet valve 1341, the water inlet valve 1351 and the water outlet valve 1352 are opened so that the refrigerant can enter the purifying device 13.
When purification is not required, the liquid inlet valve 1331, the liquid outlet valve 1341, the water inlet valve 1351 and the water outlet valve 1352 are closed, and the main valve 141 is opened, so that the heating process of the conventional air conditioning system 10 is performed.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (9)
1. An air conditioning system (10) is characterized by comprising an outdoor unit (11), an indoor unit (12), a purifying device (13) and an unloading pipeline (18), wherein a refrigerant pipeline (14) is communicated between an outdoor heat exchanger (111) of the outdoor unit (11) and an indoor heat exchanger (121) of the indoor unit (12), a purifying liquid outlet and a purifying liquid return port are arranged on the refrigerant pipeline (14), the purifying liquid outlet is positioned at one side, close to the indoor heat exchanger (121), of the purifying liquid return port, an input port of the purifying device (13) is communicated with the purifying liquid outlet, an output port of the purifying device (13) is communicated with the purifying liquid return port, a main valve (141) is arranged on the refrigerant pipeline (14), and the main valve (141) is positioned between the purifying liquid outlet and the purifying liquid return port;
the purification device (13) comprises a regulating tank (131) and a heat exchanger (132), a purification liquid inlet pipe (133) is communicated between a liquid inlet of the regulating tank (131) and the purification liquid outlet, a purification liquid outlet pipe (134) is communicated between a liquid outlet of the regulating tank (131) and the purification liquid return port, the regulating tank (131) is further provided with an exhaust port, an exhaust pipeline (1311) is arranged at the exhaust port, a pipeline between a compressor (15) of the outdoor unit (11) and a four-way valve (16) of the outdoor unit (11) is a high-pressure pipe (17), and one end, far away from the regulating tank (131), of the exhaust pipeline (1311) is communicated with the high-pressure pipe (17); the heat exchanger (132) is arranged on the purification liquid inlet pipe (133) and is used for cooling the refrigerant in the purification liquid inlet pipe (133);
one end of the unloading pipeline (18) is communicated with the purification liquid inlet pipe (133), the other end of the unloading pipeline (18) is communicated with the refrigerant pipeline (14), an unloading valve (181) is arranged on the unloading pipeline (18), and the position, communicated with the unloading pipeline (18), of the refrigerant pipeline (14) is located at one side, far away from the purification liquid outlet, of the main valve (141).
2. The air conditioning system (10) of claim 1, wherein the exhaust duct (1311) is provided with an exhaust valve (1312).
3. The air conditioning system (10) according to claim 2, characterized in that a pressurization valve (1313) is provided on the exhaust pipe (1311), the pressurization valve (1313) being located on a side of the exhaust valve (1312) remote from the conditioning tank (131).
4. The air conditioning system (10) of claim 1, further comprising a heat exchange line (135) for circulating a refrigerant liquid, the heat exchanger (132) being a plate heat exchanger, a first flow passage of the plate heat exchanger being in communication with the purification feed tube (133), a second flow passage of the plate heat exchanger being in communication with the heat exchange line (135).
5. The air conditioning system (10) of claim 4, wherein the inlet end of the heat exchange tube (135) is provided with a water inlet valve (1351), and the outlet end of the heat exchange tube (135) is provided with a water outlet valve (1352).
6. The air conditioning system (10) of claim 1, wherein the purification liquid inlet pipe (133) is provided with a liquid inlet valve (1331), the liquid inlet valve (1331) is located at one side of the heat exchanger (132) close to the purification liquid outlet, and the purification liquid outlet pipe (134) is provided with a liquid outlet valve (1341).
7. The air conditioning system (10) of any of claims 1 to 6, further comprising a pressure detection assembly for detecting an evaporation pressure and a condensation pressure of the air conditioning system (10), and a temperature detection assembly for detecting an indoor ambient temperature and an exhaust temperature of a compressor (15) of the outdoor unit (11), both of which are electrically connected to the main valve (141).
8. The air conditioning system (10) according to any of claims 1 to 6, wherein a heating electronic expansion valve (19) is provided on the refrigerant pipeline (14), and the heating electronic expansion valve (19) is located at a side of the purification liquid return port close to the outdoor heat exchanger (111).
9. An air conditioning system control method, characterized by employing the air conditioning system (10) according to any one of claims 1 to 8, further comprising the steps of:
when the air conditioning system (10) executes a heating process, detecting whether air is mixed in a refrigerant of the air conditioning system (10);
if air is mixed in the refrigerant of the air conditioning system (10), the main valve (141) is closed, and the refrigerant flowing from the indoor heat exchanger (121) to the outdoor heat exchanger (111) enters the purifying device (13) to perform the purifying process.
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| CN110260436A (en) | 2019-09-20 |
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