CN111197877B - Pressure regulator, outdoor unit, air conditioning system and control method of air conditioning system - Google Patents
Pressure regulator, outdoor unit, air conditioning system and control method of air conditioning system Download PDFInfo
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- CN111197877B CN111197877B CN202010120640.1A CN202010120640A CN111197877B CN 111197877 B CN111197877 B CN 111197877B CN 202010120640 A CN202010120640 A CN 202010120640A CN 111197877 B CN111197877 B CN 111197877B
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000007788 liquid Substances 0.000 claims abstract description 296
- 230000001105 regulatory effect Effects 0.000 claims abstract description 145
- 239000003507 refrigerant Substances 0.000 claims abstract description 142
- 238000010438 heat treatment Methods 0.000 claims abstract description 33
- 238000001704 evaporation Methods 0.000 claims abstract description 9
- 238000000926 separation method Methods 0.000 claims description 33
- 238000005485 electric heating Methods 0.000 claims description 10
- 230000001502 supplementing effect Effects 0.000 claims description 10
- 230000001276 controlling effect Effects 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 230000006872 improvement Effects 0.000 abstract description 5
- 230000008569 process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 238000003491 array Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010257 thawing Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- 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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/02—Details of evaporators
Abstract
The present application relates to a pressure regulator, an outdoor unit, an air conditioning system, and a control method of the air conditioning system, wherein the pressure regulator includes: a pressure regulating tank; the pressure regulating tank is provided with a liquid refrigerant inlet and a gaseous refrigerant outlet; the liquid refrigerant inlet is communicated with a gas-liquid separator in the outdoor unit through a first flow direction control assembly; the pressure regulating tank is provided with a heating device for evaporating the liquid refrigerant entering the pressure regulating tank into a gaseous refrigerant; the gaseous refrigerant outlet is communicated with a compressor in the outdoor unit through a second flow direction control assembly. Based on the above, the liquid refrigerant flows into the pressure regulating tank under the pressure in the gas-liquid separator, and is separated from the low pressure side of the air conditioning system by the first flow direction control assembly and the second flow direction control assembly, so that the phenomenon that the low pressure side pressure is greatly improved due to forced heating in the prior art is controllable to a certain extent, and the influence caused by the great improvement of the low pressure side pressure can be effectively avoided.
Description
Technical Field
The present disclosure relates to the field of air conditioning technologies, and in particular, to a pressure regulator, an outdoor unit, an air conditioning system, and a control method of the air conditioning system.
Background
In the long-term heating operation process of the conventional multi-split air conditioning system in a low-temperature environment, the heat exchanger of the outdoor unit gradually frosts, so that the refrigerant is incompletely evaporated, accumulated liquid is gradually formed in the gas-liquid separator, the quantity of circulating refrigerant in the air conditioning system is gradually reduced, the heat exchange capacity of the indoor unit is gradually attenuated, and the defrosting frequency is increased.
At present, an electric heating belt is generally added around the gas-liquid separator or an electric heating pipe is added inside the gas-liquid separator to forcedly heat the liquid refrigerant stored in the gas-liquid separator, but the forced heating and evaporation mode can greatly increase the pressure of the low-pressure side of the air conditioning system and reduce the heat exchange effect of the evaporation side.
Disclosure of Invention
In order to overcome the problems in the related art to at least a certain extent, the present application provides a pressure regulator, an outdoor unit, an air conditioning system, and a control method of the air conditioning system.
According to a first aspect of the present application, there is provided a pressure regulator applied to an outdoor unit, comprising:
a pressure regulating tank;
the pressure regulating tank is provided with a liquid refrigerant inlet and a gaseous refrigerant outlet; the liquid refrigerant inlet is communicated with the gas-liquid separator in the outdoor unit through a first flow direction control assembly, so that the liquid refrigerant in the gas-liquid separator enters the pressure regulating tank through the first flow direction control assembly by controlling the state of the first flow direction control assembly;
the pressure regulating tank is provided with a heating device for evaporating the liquid refrigerant entering the pressure regulating tank into a gaseous refrigerant;
the gaseous refrigerant outlet is communicated with a compressor in the outdoor unit through a second flow direction control assembly, so that the gaseous refrigerant sequentially passes through the gaseous refrigerant outlet and the second flow direction control assembly and enters the compressor.
Optionally, the first flow control assembly includes a first regulator valve and a check valve; the first regulating valve is used for regulating the flow of the liquid refrigerant in the gas-liquid separator flowing into the pressure regulating tank; the check valve is used for preventing the refrigerant in the pressure regulating tank from reversely flowing into the gas-liquid separator.
Optionally, the second flow direction control assembly includes a second regulating valve and a third regulating valve, one end of the second regulating valve and one end of the third regulating valve are both connected with the gaseous refrigerant outlet, the other end of the second regulating valve is used for being connected with the air inlet of the compressor, and the other end of the third regulating valve is used for being connected with the air supplementing port of the compressor.
Optionally, the heating device is an electric heater, and the electric heater is arranged inside the pressure regulating tank;
or alternatively, the first and second heat exchangers may be,
the heating device is an electric heating belt, and the electric heating belt is wound on the outer surface of the pressure regulating tank.
Optionally, the gaseous refrigerant outlet is disposed at an end of the pressure regulating tank far away from the ground when the pressure regulating tank is in a mounted state.
Optionally, the liquid refrigerant inlet is disposed at an end of the pressure regulating tank, which is close to the ground when the pressure regulating tank is in an installed state.
According to a second aspect of the present application, there is provided an outdoor unit including:
a pressure regulator as described in the first aspect of the present application;
a gas-liquid separator provided with a gas-liquid separator inlet, a first gas-liquid separation outlet and a second gas-liquid separation outlet;
a compressor;
the gas-liquid separation inlet is used for allowing a circulating refrigerant in an air conditioning system where the outdoor unit is located to enter; the outlet of the first gas-liquid separator is used for allowing a gaseous refrigerant in the circulating refrigerant subjected to gas-liquid separation to enter the compressor through a fourth regulating valve; the second gas-liquid separation outlet is used for allowing the liquid refrigerant in the circulating refrigerant subjected to gas-liquid separation to flow into the pressure regulator through the first flow control assembly;
the pressure regulators are connected to the compressors respectively through second flow control assemblies.
Optionally, the second gas-liquid separation outlet is disposed at an end of the gas-liquid separator, which is close to the ground when the gas-liquid separator is in the installed state.
According to a third aspect of the present application, there is provided an outdoor unit including:
a pressure regulator as described in the first aspect of the present application;
a gas-liquid separator provided with a gas-liquid separator inlet, a first gas-liquid separation outlet and a second gas-liquid separation outlet;
a compressor provided with an air inlet and an air supplementing port;
the gas-liquid separation inlet is used for allowing a circulating refrigerant in an air conditioning system where the outdoor unit is located to enter; the outlet of the first gas-liquid separator is used for allowing a gaseous refrigerant in the circulating refrigerant subjected to gas-liquid separation to enter the compressor through a fourth regulating valve; the second gas-liquid separation outlet is used for allowing the liquid refrigerant in the circulating refrigerant subjected to gas-liquid separation to flow into the pressure regulator through the first flow control assembly;
the pressure regulator is connected with the gaseous refrigerant outlet through one end of the second regulating valve and one end of the third regulating valve in the second flow direction control assembly, the other end of the second regulating valve is connected with the air inlet, and the other end of the third regulating valve is connected with the air supplementing port.
According to a fourth aspect of the present application, there is provided an air conditioning system comprising:
the outdoor unit according to the second or third aspect of the present application;
and the indoor unit is connected with the outdoor unit.
According to a fifth aspect of the present application, there is provided an air conditioning system control method applied to the air conditioning system according to the fourth aspect of the present application, including:
acquiring a liquid discharge signal; the liquid discharge signal comprises a liquid discharge starting signal and a liquid discharge stopping signal;
executing a first control logic when the liquid discharge signal is a liquid discharge starting signal; executing a second control logic when the liquid discharge signal is a liquid discharge stopping signal;
the first control logic includes:
controlling the second flow direction control assembly to be opened for a preset time according to the liquid discharge signal so as to reduce the pressure in the pressure regulating tank;
opening the first flow control assembly to enable liquid refrigerant in the gas-liquid separator to flow into the pressure regulating tank;
opening the heating device and simultaneously reducing the opening of the fourth regulating valve according to a preset speed so that the pressure in the gas-liquid separator is larger than the pressure in the pressure regulating tank;
the second control logic includes:
sequentially performing the following steps according to a preset time interval: closing the heating device, closing the first flow direction control assembly, adjusting the opening of the fourth regulating valve to be the original opening, and closing the second flow direction control assembly.
Optionally, acquiring the drainage signal includes:
acquiring the inlet temperature of a gas-liquid separator of the gas-liquid separator and the inlet temperature of a compressor;
when the inlet temperature of the gas-liquid separator and the inlet temperature of the compressor meet a first preset condition, the liquid discharge signal is a liquid discharge starting signal; the first preset condition is that the difference between the inlet temperature of the gas-liquid separator and the inlet temperature of the compressor is smaller than a preset temperature difference.
Optionally, acquiring the drainage signal includes:
acquiring the current time and the time of executing the first control logic last time;
calculating the difference between the current moment and the moment of executing the first control logic last time to obtain a liquid discharge time difference;
when the liquid discharge time difference meets a second preset condition, the liquid discharge signal is a liquid discharge starting signal; the second preset condition is that the liquid discharge time difference is greater than or equal to a preset time interval.
Optionally, acquiring the drainage signal includes:
acquiring the inlet temperature of a gas-liquid separator of the gas-liquid separator and the inlet temperature of a compressor;
when the inlet temperature of the gas-liquid separator and the inlet temperature of the compressor meet a first preset condition, the liquid discharge signal is a first liquid discharge starting signal; the first preset condition is that the difference between the inlet temperature of the gas-liquid separator and the inlet temperature of the compressor is smaller than a preset temperature difference;
or alternatively, the first and second heat exchangers may be,
acquiring the current time, the time of executing the first control logic according to the second liquid discharge starting signal and the time of executing the first control logic last time;
calculating the difference between the current moment and the moment of executing the first control logic according to the second starting liquid discharge signal to obtain a first liquid discharge time difference; calculating the difference between the current moment and the moment of executing the first control logic last time to obtain a second liquid discharge time difference;
when the first liquid discharge time difference value and the second liquid discharge time difference value meet a third preset condition, the liquid discharge signal is a liquid discharge starting signal; the third preset condition is that the first liquid discharge time difference is greater than or equal to a preset time interval and the second liquid discharge time difference is greater than a minimum time interval.
The technical scheme that this application provided can include following beneficial effect: the pressure regulator comprises a pressure regulating tank, the pressure regulating tank is provided with a liquid refrigerant inlet and a gaseous refrigerant outlet, the liquid refrigerant inlet is communicated with the gas-liquid separator in the outdoor unit through a first flow direction control assembly, the gaseous refrigerant outlet is communicated with the compressor in the outdoor unit through a second flow direction control assembly, and the pressure regulator is internally provided with a heating device. Based on the above, the liquid refrigerant flows into the pressure regulating tank under the pressure in the gas-liquid separator, and is separated from the low pressure side of the air conditioning system by the first flow direction control assembly and the second flow direction control assembly, so that the phenomenon that the low pressure side pressure is greatly improved due to forced heating in the prior art is controllable to a certain extent, and the influence caused by the great improvement of the low pressure side pressure can be effectively avoided.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic structural view of a pressure regulator according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of an outdoor unit according to a second embodiment of the present application.
Fig. 3 is a schematic structural diagram of an air conditioning system according to a third embodiment of the present application.
Fig. 4 is a flow chart of an air conditioner control method according to a fourth embodiment of the present application.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the accompanying claims.
In the long-term heating operation process of the conventional multi-split air conditioning system in a low-temperature environment, the heat exchanger of the outdoor unit gradually frosts, so that the refrigerant is incompletely evaporated, accumulated liquid is gradually formed in the gas-liquid separator, the quantity of circulating refrigerant in the air conditioning system is gradually reduced, the heat exchange capacity of the indoor unit is gradually attenuated, and the defrosting frequency is increased.
At present, an electric heating belt is generally added around the gas-liquid separator or an electric heating pipe is added inside the gas-liquid separator to forcedly heat the liquid refrigerant stored in the gas-liquid separator, but the forced heating and evaporation mode can greatly increase the pressure of the low-pressure side of the air conditioning system and reduce the heat exchange effect of the evaporation side.
In order to solve the above-mentioned technical problems, the present application provides a pressure regulator, an outdoor unit, an air conditioning system, and a control method of the air conditioning system, and the following description will be given by way of examples.
Example 1
Referring to fig. 1, fig. 1 is a schematic structural diagram of a pressure regulator according to an embodiment of the present application.
As shown in fig. 1, the pressure regulator provided in this embodiment includes:
a pressure regulating tank 1;
the pressure regulating tank is provided with a liquid refrigerant inlet and a gaseous refrigerant outlet; the liquid refrigerant inlet is communicated with the gas-liquid separator in the outdoor unit through a first flow direction control assembly 2, so that the liquid refrigerant in the gas-liquid separator enters the pressure regulating tank through the first flow direction control assembly and the liquid refrigerant inlet under the action of the pressure in the gas-liquid separator by controlling the state of the first flow direction control assembly;
the pressure regulating tank is provided with a heating device 3 for evaporating the liquid refrigerant entering the pressure regulating tank into a gaseous refrigerant;
the gaseous refrigerant outlet is communicated with a refrigerant circulation pipeline in the outdoor unit through a second flow direction control assembly 4, so that the gaseous refrigerant sequentially passes through the gaseous refrigerant outlet and the second flow direction control assembly and escapes from the pressure regulating tank to the refrigerant circulation pipeline of the outdoor unit.
The pressure regulator comprises a pressure regulating tank, the pressure regulating tank is provided with a liquid refrigerant inlet and a gaseous refrigerant outlet, the liquid refrigerant inlet is communicated with the gas-liquid separator in the outdoor unit through a first flow direction control assembly, the gaseous refrigerant outlet is communicated with the compressor in the outdoor unit through a second flow direction control assembly, and the pressure regulator is internally provided with a heating device. Based on the above, the liquid refrigerant flows into the pressure regulating tank under the pressure in the gas-liquid separator, and is separated from the low pressure side of the air conditioning system by the first flow direction control assembly and the second flow direction control assembly, so that the phenomenon that the low pressure side pressure is greatly improved due to forced heating in the prior art is controllable to a certain extent, and the influence caused by the great improvement of the low pressure side pressure can be effectively avoided.
In particular, the first flow control assembly may comprise a first regulating valve 21 and a non-return valve 22; the first regulating valve is used for regulating the flow of the liquid refrigerant in the gas-liquid separator flowing into the pressure regulating tank; the check valve is used for preventing the refrigerant in the pressure regulating tank from reversely flowing into the gas-liquid separator. Because in the operation process of the above structure, when the liquid refrigerant is continuously evaporated, the pressure in the pressure regulating tank may be greater than the pressure in the gas-liquid separator, and at this time, the liquid may have a countercurrent condition (i.e., flow from the pressure regulating tank into the gas-liquid separator), and the first flow direction control assembly is provided with a check valve, so that the countercurrent condition can be avoided. The first regulating valve and the check valve are both arranged on a flow pipeline between the pressure regulating tank and the gas-liquid separator.
In order to improve the practicability of the pressure regulator in this embodiment, the second flow direction control assembly in this embodiment may be provided as two regulating valves with different flow directions, specifically, the second flow direction control assembly may include a second regulating valve 41 and a third regulating valve 42, one end of the second regulating valve and one end of the third regulating valve are both connected with the gaseous refrigerant outlet, the other end of the second regulating valve is used for connecting with the air inlet of the compressor 5 in the outdoor unit, and the other end of the third regulating valve is used for connecting with the air supplementing port of the compressor. When liquid discharge is carried out, the gaseous refrigerant in the pressure regulating tank can be introduced into the compressor from the air inlet of the compressor through the second regulating valve, and the gaseous refrigerant in the pressure regulating tank can be introduced into the air supplementing pipeline of the compressor through the third regulating valve, so that the middle air supplementing amount is improved, and the heating capacity of the air conditioning system is improved.
In addition, there may be various heating devices, for example, the heating device is an electric heater, and the electric heater is disposed inside the pressure adjustment tank (as shown in fig. 1); or the heating device is an electric heating belt, and the electric heating belt is wound on the outer surface of the pressure regulating tank.
Because gaseous refrigerant can be in the top of liquid refrigerant (this top refers to the direction of keeping away from ground more), consequently, gaseous refrigerant export can set up the pressure regulating jar is in the one end of keeping away from ground when installing the completion state to make things convenient for gaseous refrigerant's smooth discharge.
Correspondingly, the liquid refrigerant inlet is arranged at one end, close to the ground, of the pressure regulating tank in an installation completion state. The liquid refrigerant can flow into the pressure regulating tank directly. Of course, the liquid refrigerant inlet can also be arranged at one end far away from the ground, so that the situation that the liquid refrigerant cannot flow into the pressure regulating tank by means of the pressure in the gas-liquid separator due to overlarge gravity when the liquid refrigerant in the pressure regulating tank is more is avoided.
Example two
Referring to fig. 2, fig. 2 is a schematic structural diagram of an outdoor unit according to a second embodiment of the present disclosure.
As shown in fig. 2, the outdoor unit provided in this embodiment includes:
a pressure regulator as described in embodiment one of the present application;
a gas-liquid separator 7 provided with a gas-liquid separator inlet, a first gas-liquid separation outlet, and a second gas-liquid separation outlet;
a compressor 5;
the gas-liquid separation inlet is used for allowing a circulating refrigerant in an air conditioning system where the outdoor unit is located to enter; the outlet of the first gas-liquid separator is used for allowing the gaseous refrigerant in the circulating refrigerant after gas-liquid separation to enter the compressor through a fourth regulating valve 6; the second gas-liquid separation outlet is used for allowing the liquid refrigerant in the circulating refrigerant subjected to gas-liquid separation to flow into the pressure regulator through the first flow control assembly;
the pressure regulators are connected to the compressors respectively through second flow control assemblies.
Because the pressure regulator comprises a pressure regulating tank, the pressure regulating tank is provided with a liquid refrigerant inlet and a gaseous refrigerant outlet, the liquid refrigerant inlet is communicated with the gas-liquid separator in the outdoor unit through a first flow direction control assembly, and the gaseous refrigerant outlet is communicated with the compressor in the outdoor unit through a second flow direction control assembly. Based on the above, the liquid refrigerant flows into the pressure regulating tank under the pressure in the gas-liquid separator, and is separated from the low pressure side of the air conditioning system by the first flow direction control assembly and the second flow direction control assembly, so that the phenomenon that the low pressure side pressure is greatly improved due to forced heating in the prior art is controllable to a certain extent, and the influence caused by the great improvement of the low pressure side pressure can be effectively avoided.
When the second flow direction control assembly includes one end of the second regulating valve and the third regulating valve, the compressor should be provided with an air inlet and an air compensating port, the pressure regulator is connected with the gaseous refrigerant outlet through one end of the second regulating valve and one end of the third regulating valve, the other end of the second regulating valve is connected with the air inlet, and the other end of the third regulating valve is connected with the air compensating pipe of the air compensating port.
The second gas-liquid separation outlet is arranged at one end of the gas-liquid separator, which is close to the ground when the gas-liquid separator is in an installation completion state, so that liquid refrigerant can conveniently flow out of the gas-liquid separator.
Example III
Referring to fig. 3, fig. 3 is a schematic structural diagram of an air conditioning system according to a third embodiment of the present application.
As shown in fig. 3, the air conditioning system provided in this embodiment includes: an outdoor unit 301 and an indoor unit 302 connected to the outdoor unit according to a second embodiment of the present application.
Because the pressure regulator comprises a pressure regulating tank, the pressure regulating tank is provided with a liquid refrigerant inlet and a gaseous refrigerant outlet, the liquid refrigerant inlet is communicated with the gas-liquid separator in the outdoor unit through a first flow direction control assembly, and the gaseous refrigerant outlet is communicated with the compressor in the outdoor unit through a second flow direction control assembly. Based on the above, the liquid refrigerant flows into the pressure regulating tank under the pressure in the gas-liquid separator, and is separated from the low pressure side of the air conditioning system by the first flow direction control assembly and the second flow direction control assembly, so that the phenomenon that the low pressure side pressure is greatly improved due to forced heating in the prior art is controllable to a certain extent, and the influence caused by the great improvement of the low pressure side pressure can be effectively avoided.
Example IV
Referring to fig. 4, fig. 4 is a flow chart of an air conditioner control method according to a fourth embodiment of the present application.
As shown in fig. 4, the air conditioner control method provided in this embodiment includes:
step S401, obtaining a liquid discharge signal; the liquid discharge signal comprises a liquid discharge starting signal and a liquid discharge stopping signal;
step S402, executing a first control logic when the liquid discharge signal is a liquid discharge starting signal;
and step S403, executing a second control logic when the liquid discharge signal is a liquid discharge stop signal.
Wherein the first control logic comprises: controlling the second flow direction control assembly to be opened for a preset time according to the liquid discharge signal so as to reduce the pressure in the pressure regulating tank; opening the first flow control assembly to enable liquid refrigerant in the gas-liquid separator to flow into the pressure regulating tank; and starting the heating device and simultaneously reducing the opening of the fourth regulating valve according to a preset speed so as to enable the pressure in the gas-liquid separator to be larger than the pressure in the pressure regulating tank.
The second control logic includes: sequentially performing the following steps according to a preset time interval: closing the heating device, closing the first flow direction control assembly, adjusting the opening of the fourth regulating valve to be the original opening, and closing the second flow direction control assembly.
In the first control logic, the opening of the fourth regulating valve is reduced according to a preset speed while the heating device is started, so as to ensure that the pressure in the pressure regulating tank is always smaller than the pressure in the gas-liquid separator, and the pressure in the pressure regulating tank is gradually increased due to the fact that the liquid refrigerant in the pressure regulating tank is continuously evaporated into the gaseous refrigerant, so that the opening of the fourth regulating valve can be reduced to avoid that the pressure in the pressure regulating tank is larger than the pressure in the gas-liquid separator, the gaseous refrigerant is reduced to escape from the gas-liquid separator, and the gaseous refrigerant accumulated in the gas-liquid separator is increased, so that the pressure in the gas-liquid separator is increased. Specifically, the preset rate needs to be determined according to the volume of the gas-liquid separator actually installed and the circulation amount of the refrigerant in a specific operation process.
In addition, there are two ways to determine the signal to start draining, the first way to drain according to the actual liquid accumulation condition and the second way to drain at fixed time.
Specifically, when the determination of the start drain signal follows the first approach, acquiring the drain signal may include:
acquiring the inlet temperature of a gas-liquid separator of the gas-liquid separator and the inlet temperature of a compressor; when the inlet temperature of the gas-liquid separator and the inlet temperature of the compressor meet a first preset condition, the liquid discharge signal is a liquid discharge starting signal; the first preset condition is that the difference between the inlet temperature of the gas-liquid separator and the inlet temperature of the compressor is smaller than a preset temperature difference.
When the determination of the start drain signal follows the second approach, acquiring the drain signal may include:
acquiring the current time and the time of executing the first control logic last time; calculating the difference between the current moment and the moment of executing the first control logic last time to obtain a liquid discharge time difference; when the liquid discharge time difference meets a second preset condition, the liquid discharge signal is a liquid discharge starting signal; the second preset condition is that the liquid discharge time difference is greater than or equal to a preset time interval.
Of course, the first and second methods may be adopted to determine the signal of starting liquid discharge, so as to avoid the liquid discharge times caused by the two methods being more than the actual requirement, the method for obtaining the signal of starting liquid discharge may include:
acquiring the inlet temperature of a gas-liquid separator of the gas-liquid separator and the inlet temperature of a compressor; when the inlet temperature of the gas-liquid separator and the inlet temperature of the compressor meet a first preset condition, the liquid discharge signal is a first liquid discharge starting signal; the first preset condition is that the difference between the inlet temperature of the gas-liquid separator and the inlet temperature of the compressor is smaller than a preset temperature difference; or, acquiring the current time, the time of executing the first control logic according to the second liquid discharge starting signal and the time of executing the first control logic last time; calculating the difference between the current moment and the moment of executing the first control logic according to the second starting liquid discharge signal to obtain a first liquid discharge time difference; calculating the difference between the current moment and the moment of executing the first control logic last time to obtain a second liquid discharge time difference; when the first liquid discharge time difference value and the second liquid discharge time difference value meet a third preset condition, the liquid discharge signal is a liquid discharge starting signal; the third preset condition is that the first liquid discharge time difference is greater than or equal to a preset time interval and the second liquid discharge time difference is greater than a minimum time interval.
The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.
It is to be understood that the same or similar parts in the above embodiments may be referred to each other, and that in some embodiments, the same or similar parts in other embodiments may be referred to.
It should be noted that in the description of the present application, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present application, unless otherwise indicated, the meaning of "plurality" means at least two.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.
It is to be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.
Claims (11)
1. An air conditioning system control method applied to an air conditioning system, characterized in that the air conditioning system comprises: an outdoor unit; the indoor unit is connected with the outdoor unit;
wherein, the off-premises station includes: a pressure regulator; a gas-liquid separator provided with a gas-liquid separator inlet, a first gas-liquid separation outlet and a second gas-liquid separation outlet; a compressor; the inlet of the gas-liquid separator is used for allowing a circulating refrigerant in an air conditioning system where the outdoor unit is located to enter; the first gas-liquid separation outlet is used for allowing a gaseous refrigerant in the circulating refrigerant subjected to gas-liquid separation to enter the compressor through a fourth regulating valve; the second gas-liquid separation outlet is used for allowing liquid refrigerant in the circulating refrigerant subjected to gas-liquid separation to flow into the pressure regulator through the first flow direction control assembly; the pressure regulator is connected with the compressor through a second flow direction control assembly;
the pressure regulator is applied to an outdoor unit, and comprises: a pressure regulating tank; the pressure regulating tank is provided with a liquid refrigerant inlet and a gaseous refrigerant outlet; the liquid refrigerant inlet is communicated with the gas-liquid separator in the outdoor unit through a first flow direction control assembly, so that the liquid refrigerant in the gas-liquid separator enters the pressure regulating tank through the first flow direction control assembly and the liquid refrigerant inlet under the action of the pressure in the gas-liquid separator by controlling the state of the first flow direction control assembly; the pressure regulating tank is provided with a heating device for evaporating the liquid refrigerant entering the pressure regulating tank into a gaseous refrigerant; the gaseous refrigerant outlet is communicated with a refrigerant circulation pipeline in the outdoor unit through a second flow direction control assembly, so that the gaseous refrigerant sequentially passes through the gaseous refrigerant outlet and the second flow direction control assembly and escapes from the pressure regulating tank to the refrigerant circulation pipeline of the outdoor unit;
the method comprises the following steps:
acquiring a liquid discharge signal; the liquid discharge signal comprises a liquid discharge starting signal and a liquid discharge stopping signal;
executing a first control logic when the liquid discharge signal is a liquid discharge starting signal; executing a second control logic when the liquid discharge signal is a liquid discharge stopping signal;
the first control logic includes:
controlling the second flow direction control assembly to be opened for a preset time according to the liquid discharge signal so as to reduce the pressure in the pressure regulating tank;
opening the first flow control assembly to enable liquid refrigerant in the gas-liquid separator to flow into the pressure regulating tank;
opening the heating device and simultaneously reducing the opening of the fourth regulating valve according to a preset speed so that the pressure in the gas-liquid separator is larger than the pressure in the pressure regulating tank;
the second control logic includes:
sequentially performing the following steps according to a preset time interval: closing the heating device, closing the first flow direction control assembly, adjusting the opening of the fourth regulating valve to be the original opening, and closing the second flow direction control assembly.
2. The air conditioning system control method according to claim 1, wherein acquiring the liquid discharge signal includes:
acquiring the inlet temperature of a gas-liquid separator of the gas-liquid separator and the inlet temperature of a compressor;
when the inlet temperature of the gas-liquid separator and the inlet temperature of the compressor meet a first preset condition, the liquid discharge signal is a liquid discharge starting signal; the first preset condition is that the difference between the inlet temperature of the gas-liquid separator and the inlet temperature of the compressor is smaller than a preset temperature difference.
3. The air conditioning system control method according to claim 1, wherein acquiring the liquid discharge signal includes:
acquiring the current time and the time of executing the first control logic last time;
calculating the difference between the current moment and the moment of executing the first control logic last time to obtain a liquid discharge time difference;
when the liquid discharge time difference meets a second preset condition, the liquid discharge signal is a liquid discharge starting signal; the second preset condition is that the liquid discharge time difference is greater than or equal to a preset time interval.
4. The air conditioning system control method according to claim 1, wherein acquiring the liquid discharge signal includes:
acquiring the inlet temperature of a gas-liquid separator of the gas-liquid separator and the inlet temperature of a compressor;
when the inlet temperature of the gas-liquid separator and the inlet temperature of the compressor meet a first preset condition, the liquid discharge signal is a first liquid discharge starting signal; the first preset condition is that the difference between the inlet temperature of the gas-liquid separator and the inlet temperature of the compressor is smaller than a preset temperature difference;
or alternatively, the first and second heat exchangers may be,
acquiring the current time, the time of executing the first control logic according to the second liquid discharge starting signal and the time of executing the first control logic last time;
calculating the difference between the current moment and the moment of executing the first control logic according to the second starting liquid discharge signal to obtain a first liquid discharge time difference; calculating the difference between the current moment and the moment of executing the first control logic last time to obtain a second liquid discharge time difference;
when the first liquid discharge time difference value and the second liquid discharge time difference value meet a third preset condition, the liquid discharge signal is a liquid discharge starting signal; the third preset condition is that the first liquid discharge time difference is greater than or equal to a preset time interval and the second liquid discharge time difference is greater than a minimum time interval.
5. The air conditioning system control method of claim 1, wherein the first flow control assembly includes a first regulator valve and a check valve; the first regulating valve is used for regulating the flow of the liquid refrigerant in the gas-liquid separator flowing into the pressure regulating tank; the check valve is used for preventing the refrigerant in the pressure regulating tank from reversely flowing into the gas-liquid separator.
6. The air conditioning system control method according to claim 1, wherein the second flow direction control assembly includes a second regulating valve and a third regulating valve, one end of the second regulating valve and one end of the third regulating valve are both connected with the gaseous refrigerant outlet, the other end of the second regulating valve is used for connecting an air inlet of a compressor in the outdoor unit, and the other end of the third regulating valve is used for connecting a gas supplementing pipeline of the compressor.
7. The control method of an air conditioning system according to claim 1, wherein the heating device is an electric heater provided inside the pressure regulating tank;
or alternatively, the first and second heat exchangers may be,
the heating device is an electric heating belt, and the electric heating belt is wound on the outer surface of the pressure regulating tank.
8. The method according to claim 1, wherein the gaseous refrigerant outlet is provided at an end of the pressure adjustment tank which is remote from the ground when the pressure adjustment tank is in the installation completed state.
9. The method according to claim 1, wherein the liquid refrigerant inlet is provided at an end of the pressure adjustment tank which is close to the ground when the pressure adjustment tank is in the installed state.
10. The control method of an air conditioning system according to claim 1, wherein the second gas-liquid separation outlet is provided at an end of the gas-liquid separator that is close to the ground when the gas-liquid separator is in an installed state.
11. An air conditioning system control method applied to an air conditioning system, characterized in that the air conditioning system comprises: an outdoor unit; the indoor unit is connected with the outdoor unit;
wherein, the off-premises station includes: a pressure regulator; a gas-liquid separator provided with a gas-liquid separator inlet, a first gas-liquid separation outlet and a second gas-liquid separation outlet; a compressor provided with an air inlet and an air supplementing port; the inlet of the gas-liquid separator is used for allowing a circulating refrigerant in an air conditioning system where the outdoor unit is located to enter; the first gas-liquid separation outlet is used for allowing a gaseous refrigerant in the circulating refrigerant subjected to gas-liquid separation to enter the compressor through a fourth regulating valve; the second gas-liquid separation outlet is used for allowing liquid refrigerant in the circulating refrigerant subjected to gas-liquid separation to flow into the pressure regulator through the first flow direction control assembly; the pressure regulator is connected with the gaseous refrigerant outlet through one end of a second regulating valve and one end of a third regulating valve in the second flow direction control assembly, the other end of the second regulating valve is connected with the air inlet, and the other end of the third regulating valve is connected with the air supplementing port;
the pressure regulator is applied to an outdoor unit, and comprises: a pressure regulating tank; the pressure regulating tank is provided with a liquid refrigerant inlet and a gaseous refrigerant outlet; the liquid refrigerant inlet is communicated with the gas-liquid separator in the outdoor unit through a first flow direction control assembly, so that the liquid refrigerant in the gas-liquid separator enters the pressure regulating tank through the first flow direction control assembly and the liquid refrigerant inlet under the action of the pressure in the gas-liquid separator by controlling the state of the first flow direction control assembly; the pressure regulating tank is provided with a heating device for evaporating the liquid refrigerant entering the pressure regulating tank into a gaseous refrigerant; the gaseous refrigerant outlet is communicated with a refrigerant circulation pipeline in the outdoor unit through a second flow direction control assembly, so that the gaseous refrigerant sequentially passes through the gaseous refrigerant outlet and the second flow direction control assembly and escapes from the pressure regulating tank to the refrigerant circulation pipeline of the outdoor unit;
the second flow direction control assembly comprises a second regulating valve and a third regulating valve, one end of the second regulating valve and one end of the third regulating valve are both connected with the gaseous refrigerant outlet, the other end of the second regulating valve is used for being connected with an air inlet of a compressor in the outdoor unit, and the other end of the third regulating valve is used for being connected with an air supplementing pipeline of the compressor;
the method comprises the following steps:
acquiring a liquid discharge signal; the liquid discharge signal comprises a liquid discharge starting signal and a liquid discharge stopping signal;
executing a first control logic when the liquid discharge signal is a liquid discharge starting signal; executing a second control logic when the liquid discharge signal is a liquid discharge stopping signal;
the first control logic includes:
controlling the second flow direction control assembly to be opened for a preset time according to the liquid discharge signal so as to reduce the pressure in the pressure regulating tank;
opening the first flow control assembly to enable liquid refrigerant in the gas-liquid separator to flow into the pressure regulating tank;
opening the heating device and simultaneously reducing the opening of the fourth regulating valve according to a preset speed so that the pressure in the gas-liquid separator is larger than the pressure in the pressure regulating tank;
the second control logic includes:
sequentially performing the following steps according to a preset time interval: closing the heating device, closing the first flow direction control assembly, adjusting the opening of the fourth regulating valve to be the original opening, and closing the second flow direction control assembly.
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5878589A (en) * | 1996-04-10 | 1999-03-09 | Denso Corporation | Vehicular air conditioning system for electric vehicles |
| CN101158352A (en) * | 2007-11-09 | 2008-04-09 | 美的集团有限公司 | Shell low-pressure rotary compressor and control mode and application of refrigerant and oil return thereof |
| CN101191686A (en) * | 2006-11-30 | 2008-06-04 | 海尔集团公司 | Air conditioner for implementing high and low pressure side pressure balancing |
| JP2012127518A (en) * | 2010-12-13 | 2012-07-05 | Panasonic Corp | Air conditioner |
| CN204612275U (en) * | 2015-04-30 | 2015-09-02 | 广东美的制冷设备有限公司 | Gas-liquid separation device and air-conditioning system |
| CN106595138A (en) * | 2016-10-17 | 2017-04-26 | 珠海格力电器股份有限公司 | Air-conditioning system and method for reducing amount of liquid stored in gas-liquid separator |
| CN106969397A (en) * | 2017-05-04 | 2017-07-21 | 奥特朗电器（广州）有限公司 | Hot pump in low temp heating unit with efficient defrosting system |
| CN107477930A (en) * | 2017-08-21 | 2017-12-15 | 珠海格力电器股份有限公司 | Air-conditioning system, air-conditioning device and its control method and control device |
| CN109798701A (en) * | 2019-03-21 | 2019-05-24 | 珠海格力电器股份有限公司 | Air-conditioner control system, air conditioning control method and air-conditioning for continuous heating |
| CN110836417A (en) * | 2019-11-18 | 2020-02-25 | 珠海格力电器股份有限公司 | Air conditioner and air conditioner control method |
| CN211926200U (en) * | 2020-02-26 | 2020-11-13 | 珠海格力电器股份有限公司 | Pressure regulator, outdoor unit and air conditioning system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009150594A (en) * | 2007-12-19 | 2009-07-09 | Mitsubishi Heavy Ind Ltd | Refrigeration device |
-
2020
- 2020-02-26 CN CN202010120640.1A patent/CN111197877B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5878589A (en) * | 1996-04-10 | 1999-03-09 | Denso Corporation | Vehicular air conditioning system for electric vehicles |
| CN101191686A (en) * | 2006-11-30 | 2008-06-04 | 海尔集团公司 | Air conditioner for implementing high and low pressure side pressure balancing |
| CN101158352A (en) * | 2007-11-09 | 2008-04-09 | 美的集团有限公司 | Shell low-pressure rotary compressor and control mode and application of refrigerant and oil return thereof |
| JP2012127518A (en) * | 2010-12-13 | 2012-07-05 | Panasonic Corp | Air conditioner |
| CN204612275U (en) * | 2015-04-30 | 2015-09-02 | 广东美的制冷设备有限公司 | Gas-liquid separation device and air-conditioning system |
| CN106595138A (en) * | 2016-10-17 | 2017-04-26 | 珠海格力电器股份有限公司 | Air-conditioning system and method for reducing amount of liquid stored in gas-liquid separator |
| CN106969397A (en) * | 2017-05-04 | 2017-07-21 | 奥特朗电器（广州）有限公司 | Hot pump in low temp heating unit with efficient defrosting system |
| CN107477930A (en) * | 2017-08-21 | 2017-12-15 | 珠海格力电器股份有限公司 | Air-conditioning system, air-conditioning device and its control method and control device |
| CN109798701A (en) * | 2019-03-21 | 2019-05-24 | 珠海格力电器股份有限公司 | Air-conditioner control system, air conditioning control method and air-conditioning for continuous heating |
| CN110836417A (en) * | 2019-11-18 | 2020-02-25 | 珠海格力电器股份有限公司 | Air conditioner and air conditioner control method |
| CN211926200U (en) * | 2020-02-26 | 2020-11-13 | 珠海格力电器股份有限公司 | Pressure regulator, outdoor unit and air conditioning system |
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| Publication number | Publication date |
|---|---|
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