CN109798701B - Air conditioner control system and method for continuous heating and air conditioner - Google Patents
Air conditioner control system and method for continuous heating and air conditioner Download PDFInfo
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- CN109798701B CN109798701B CN201910218610.1A CN201910218610A CN109798701B CN 109798701 B CN109798701 B CN 109798701B CN 201910218610 A CN201910218610 A CN 201910218610A CN 109798701 B CN109798701 B CN 109798701B
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Abstract
The application discloses an air conditioner control system, an air conditioner control method and an air conditioner for continuous heating, wherein the system comprises: comprises a compressor, a gas-liquid separator, an outdoor heat exchanger and: and one end of the liquid separating device is connected with the gas-liquid separator, and the other end of the liquid separating device is connected with the compressor and is used for receiving the liquid refrigerant separated by the gas-liquid separator, converting the liquid refrigerant into the gaseous refrigerant and then sending the gaseous refrigerant into the compressor. The application solves the problem of large indoor temperature fluctuation caused by effusion or frosting of the air conditioning system in the prior art, and ensures the indoor environment temperature to be stable.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to an air conditioner control system, an air conditioner control method and an air conditioner for continuous heating.
Background
At present, in the defrosting process of heating, the multi-split system needs the unit compressor to reduce frequency, the four-way valve is switched to finish the change of the flow direction of the refrigerant, so that the high-temperature refrigerant is used for defrosting the outdoor heat exchanger, the indoor unit is positioned at the evaporation side, continuous heating cannot be performed, fluctuation is caused to the indoor environment temperature, and the comfort of the unit is greatly influenced. Meanwhile, under the low-temperature condition, the vapor component of the unit is easy to accumulate liquid and frost, the evaporation temperature of the system is affected, and the heating effect cannot be ensured.
Aiming at the problem of large indoor temperature fluctuation caused by effusion or frosting of an air conditioning system in the related art, no effective solution is proposed at present.
Disclosure of Invention
The application provides an air conditioner control system, an air conditioner control method and an air conditioner for continuous heating, which at least solve the problem of large indoor temperature fluctuation caused by effusion or frosting of an air conditioner system in the prior art.
In order to solve the above technical problem, according to an aspect of the embodiments of the present application, there is provided an air conditioner control system including a compressor, a gas-liquid separator, an outdoor heat exchanger, further including: and one end of the liquid separating device is connected with the gas-liquid separator, and the other end of the liquid separating device is connected with the compressor and is used for receiving the liquid refrigerant separated by the gas-liquid separator, converting the liquid refrigerant into the gaseous refrigerant and then sending the gaseous refrigerant into the compressor.
Further, the system further comprises: and one end of the bypass branch is connected with the exhaust side of the compressor, and the other end of the bypass branch is connected with the outdoor heat exchanger and is used for directly connecting the refrigerant discharged by the compressor to the outdoor heat exchanger to defrost the outdoor heat exchanger when the system enters defrosting.
Further, the liquid separation device further comprises: and the heating device is used for heating the liquid refrigerant into a gaseous refrigerant.
Further, an outlet of the liquid separating device is connected with an air suction port of the compressor through a second exhaust valve and is used for conveying gaseous refrigerant in the liquid separating device into the air suction port of the compressor, so that liquid accumulation prevention control is realized.
Further, an outlet of the liquid separation device is connected with an enthalpy increasing port of the compressor through a first exhaust valve, and is used for conveying the gaseous refrigerant in the liquid separation device into the enthalpy increasing port of the compressor to realize enthalpy increasing control.
Further, the outlet of the liquid separating device is also connected with the outlet of the gas-liquid separator through a gas balance valve for balancing the internal pressure of the liquid separating device.
Further, a bypass valve is arranged on the bypass branch and used for entering an opening state when the system enters defrosting, and part of refrigerant discharged by the compressor is directly communicated with the outdoor heat exchanger to defrost the outdoor heat exchanger.
According to another aspect of the embodiments of the present application, there is provided an air conditioner control method applied to an air conditioner control system as described above, including: detecting whether the system meets the control condition of preventing effusion; when the system meets the anti-effusion control condition, the anti-effusion control is carried out on the system through the liquid separating device.
Further, the anti-dropsy control conditions include: the difference between the inlet pipe temperature and the outlet pipe temperature of the gas-liquid separator is greater than or equal to the preset temperature difference.
Further, the liquid accumulation prevention control is performed on the system through the liquid separation device, and the liquid accumulation prevention control method comprises the following steps: the liquid refrigerant separated by the gas-liquid separator is received by the liquid separating device, is converted into a gaseous refrigerant, and is sent to the compressor.
Further, feeding into the compressor comprises: detecting whether the system needs enthalpy increasing control; if the liquid separation device is in the liquid state, the first exhaust valve is controlled to be opened, and the gaseous refrigerant in the liquid separation device is sent to an enthalpy increasing port of the compressor; otherwise, the second exhaust valve is controlled to be opened, and the gaseous refrigerant in the liquid separating device is sent to the air suction port of the compressor.
Further, heating the liquid refrigerant to a gaseous refrigerant includes: and controlling the heating device to start to work, and heating the liquid refrigerant in the liquid separating device into gas refrigerant.
Further, the operation power of the heating device is adjusted according to the air outlet temperature of the liquid separating device.
Further, the operation power of the heating device is adjusted according to the air outlet temperature of the liquid separating device, and the method comprises the following steps: when the air outlet temperature of the liquid separation device is greater than or equal to a first preset temperature, the operating power of the heating device is 0; when the air outlet temperature of the liquid separation device is more than or equal to the second preset temperature and less than the first preset temperature, the operation power of the heating device is the first operation power; when the air outlet temperature of the liquid separation device is smaller than a second preset temperature, the operating power of the heating device is the second operating power; the first preset temperature is higher than the second preset temperature, and the first operation power is lower than the second operation power.
Further, after the anti-effusion control is performed on the system by the liquid separation device, the method further comprises: detecting whether a defrosting condition is met by the system; when the system meets defrosting conditions, a bypass branch is opened to defrost the outdoor heat exchanger; one end of the bypass branch is connected with the exhaust side of the compressor, and the other end of the bypass branch is connected with the outdoor heat exchanger and is used for directly connecting refrigerant discharged by the compressor to the outdoor heat exchanger to defrost the outdoor heat exchanger when the system enters defrosting.
Further, when opening the bypass branch and defrosting the outdoor heat exchanger, the method further comprises the following steps: controlling the heating device to start working, and heating the liquid refrigerant in the liquid separation device into a gas refrigerant; and controlling the second exhaust valve to be opened, and sending the gas refrigerant into an enthalpy-increasing port of the compressor.
Further, after defrosting the outdoor heat exchanger or after anti-liquid accumulation control of the system, the method further comprises: and opening an air balance valve at each interval for preset time to balance the internal pressure of the liquid separating device.
According to still another aspect of the embodiments of the present application, there is provided an air conditioner including the air conditioner control system as described above.
According to still another aspect of the embodiments of the present application, there is provided a computer apparatus including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the air conditioner control method as described above when executing the program.
According to yet another aspect of embodiments of the present application, there is provided a storage medium containing computer-executable instructions for performing an air conditioner control method as described above when executed by a computer processor.
In the present application, there is provided an air conditioner control system for continuous heating, comprising: the liquid separation device receives liquid refrigerant separated by the gas-liquid separator, avoids the problem of liquid accumulation possibly occurring in the gas-liquid separator, converts the liquid refrigerant into gaseous refrigerant and then sends the gaseous refrigerant into the compressor, improves the air suction amount of the compressor, comprises the air suction amount of the compressor during defrosting, effectively solves the problem that an air conditioning system in the prior art has larger temperature fluctuation due to liquid accumulation or frosting, ensures continuous heating of an inner machine of the unit, and ensures stable indoor environment temperature.
Drawings
FIG. 1 is an alternative block diagram of an air conditioning control system according to an embodiment of the present application;
FIG. 2 is an alternative flow chart of an air conditioner control method according to an embodiment of the present application;
FIG. 3 is an alternative refrigerant flow diagram for normal heating operation according to an embodiment of the present application;
FIG. 4 is an alternative refrigerant flow diagram for anti-liquid accumulation control in accordance with an embodiment of the present application;
FIG. 5 is a flow chart of an alternative refrigerant flow for anti-liquid trap control according to an embodiment of the present application; and
fig. 6 is an alternative refrigerant flow diagram for a defrosting operation according to an embodiment of the application.
Reference numerals illustrate:
1. a compressor; 2. an oil separator; 3. a four-way valve; 4. an outdoor heat exchanger; 5. an outdoor fan; 6. an outdoor heating electronic expansion valve; 7. a bypass valve; 8. a gas-liquid separator; 9. a liquid separating device; 10. a liquid discharge valve; 11. an exhaust valve 1; 12. a heating device; 13. a gas balance valve; 14. the air is discharged from the temperature sensing bag; 15. the temperature of the steam separation pipe; 16. the temperature of the steam inlet pipe; 17. and an exhaust valve 2.
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 do not represent all implementations consistent with the application. Rather, they are merely examples of apparatus and methods consistent with aspects of the application as detailed in the accompanying claims.
Example 1
In a preferred embodiment 1 of the present application, there is provided an air conditioner control system, in particular, fig. 1 shows an alternative block diagram of the apparatus, as shown in fig. 1, comprising: the compressor 1, the gas-liquid separator 8, and the outdoor heat exchanger 4 include, in addition to these:
and one end of the liquid separating device 9 is connected with the gas-liquid separator 8, and the other end of the liquid separating device is connected with the compressor 1 and is used for receiving the liquid refrigerant separated by the gas-liquid separator 8, converting the liquid refrigerant into the gaseous refrigerant and then sending the gaseous refrigerant into the compressor 1.
In the above embodiment, there is provided an air conditioner control system for continuous heating, including: the liquid separation device receives liquid refrigerant separated by the gas-liquid separator, avoids the problem of liquid accumulation possibly occurring in the gas-liquid separator, converts the liquid refrigerant into gaseous refrigerant and then sends the gaseous refrigerant into the compressor, improves the air suction amount of the compressor, comprises the air suction amount of the compressor during defrosting, effectively solves the problem that an air conditioning system in the prior art has larger temperature fluctuation due to liquid accumulation or frosting, ensures continuous heating of an inner machine of the unit, and ensures stable indoor environment temperature.
In addition, the system further comprises: and one end of the bypass branch is connected with the exhaust side of the compressor, and the other end of the bypass branch is connected with the outdoor heat exchanger and is used for directly connecting the refrigerant discharged by the compressor to the outdoor heat exchanger to defrost the outdoor heat exchanger when the system enters defrosting.
As shown in fig. 1, a bypass valve 7 is arranged on the bypass branch, and is used for entering an open state when the system enters defrosting, and introducing part of refrigerant generated by the compressor into the outdoor heat exchanger to defrost the outdoor heat exchanger. The unit enters a defrosting process, the bypass valve is opened, the four-way valve does not need reversing, the internal unit continues heating operation, and part of high-temperature refrigerant directly defrost the outdoor heat exchanger through the bypass branch.
The bypass branch is connected with the compressor and the outdoor heat exchanger, when the system enters defrosting, refrigerant flowing out of the compressor enters the indoor heat exchanger according to a normal channel, and the refrigerant generated by the compressor is led into the outdoor heat exchanger through the bypass branch to defrost the outdoor heat exchanger, so that defrosting of the outdoor heat exchanger is realized under the condition that indoor heat exchange requirements are met, the problem that temperature fluctuation is large due to liquid accumulation or frosting of an air conditioning system in the prior art is effectively solved, continuous heating of an inner machine of a unit is guaranteed, and indoor environment temperature stability is guaranteed.
In a preferred embodiment of the present application, the liquid separation device further comprises: and a heating device 12 for heating the liquid refrigerant to a gaseous refrigerant to be introduced into the compressor.
Further, an outlet of the liquid separation device is connected with an air suction port of the compressor through a second exhaust valve (exhaust valve 2) and is used for sending the gaseous refrigerant in the liquid separation device into the compressor so as to realize liquid accumulation prevention control. Under the low temperature condition, the vapor component of the unit is easy to generate effusion and frosting, the evaporation temperature of the system is influenced, and the heating effect cannot be ensured. By heating the liquid refrigerant in the vapor, the evaporation temperature is increased, and an EVI device is adopted, so that the air suction quantity of the compressor is enhanced, and the low-temperature heating quantity is increased.
Further, an outlet of the liquid separation device is connected with an enthalpy increasing port of the compressor through a second exhaust valve (exhaust valve 1) and is used for conveying the gaseous refrigerant in the liquid separation device into the enthalpy increasing port of the compressor to realize enthalpy increasing control. The heated refrigerant can enter the enthalpy-spraying port of the compressor, the exhaust capacity of the compressor is increased, the low-temperature heating capacity is further increased, and if the enthalpy-spraying of the compressor is not needed at this time, the refrigerant directly returns to the air suction port of the compressor.
Wherein the outlet of the liquid separating device is also connected with the outlet of the gas-liquid separator 8 through a gas balance valve 13 for balancing the internal pressure of the liquid separating device.
As shown in fig. 1, a bypass branch is added to the system oil 2 outlet pipe, the outlet is connected with the refrigerating direction of the outlet of the outdoor heat exchanger 4, a liquid separating device 9 is added to the vapor separator 8, the bottom of the vapor separator 8 is connected with the liquid separating device 9 through a liquid discharging valve 10, a heating device 12 is arranged at the bottom of the liquid separating device 9, an air balancing valve 13, an air discharging valve 1 (11) (a first air discharging valve) and an air discharging valve 2 (17) (a second air discharging valve) are respectively arranged at the air discharging port of the liquid separating device 9, the air balancing valve 13 is connected with the vapor separator 8 outlet pipe, the pressure balance in the liquid separating device is mainly ensured, and the liquid separation is ensured to be smooth; the exhaust valve 1 (11) is connected with an enthalpy increasing port of the compressor 1, and the exhaust valve 2 (17) is connected with an air suction port of the compressor 1.
Example 2
Based on the system provided in the above embodiment 1, there is also provided in a preferred embodiment 2 of the present application an air conditioner control method, which can be directly applied to the above system. Specifically, fig. 2 shows an alternative flow chart of the method, as shown in fig. 2, comprising the following steps S202-S204:
s202: detecting whether the system meets the control condition of preventing effusion;
s204: when the system meets the anti-effusion control condition, the anti-effusion control is carried out on the system through the liquid separating device.
In the above embodiment, there is provided an air conditioner control method for continuous heating, in which by detecting whether a system satisfies an anti-liquid accumulation control condition, when the system satisfies the anti-liquid accumulation control condition, liquid accumulation control is performed on the system by a liquid separation device. The internal machine of the unit is ensured to continuously heat, and the indoor environment temperature is ensured to be stable.
Wherein, prevent hydrops control conditions include: the difference between the inlet pipe temperature and the outlet pipe temperature of the gas-liquid separator is greater than or equal to the preset temperature difference.
Further, the liquid accumulation prevention control is performed on the system through the liquid separation device, and the liquid accumulation prevention control method comprises the following steps: the liquid refrigerant separated by the gas-liquid separator is received by the liquid separating device, is converted into a gaseous refrigerant, and is sent to the compressor. In the above embodiment, the liquid refrigerant in the liquid separation device is heated to a gas refrigerant by controlling the heating device to start operating.
Further, feeding into the compressor comprises: detecting whether the system needs enthalpy increasing control; if the liquid separation device is in the liquid state, the first exhaust valve is controlled to be opened, and the gaseous refrigerant in the liquid separation device is sent to an enthalpy increasing port of the compressor; otherwise, the second exhaust valve is controlled to be opened, and the gaseous refrigerant in the liquid separating device is sent to the air suction port of the compressor. The anti-effusion control and the enthalpy increasing control belong to two independent processes, and are not mutually dependent, but enter the anti-effusion enthalpy increasing control if the enthalpy increasing control is needed at the same time during the anti-effusion control.
When the system is controlled to prevent effusion, the operation power of the heating device is adjusted according to the air outlet temperature of the liquid separating device.
Specifically, the operation power of the heating device is adjusted according to the air outlet temperature of the liquid separating device, and the method comprises the following steps: when the air outlet temperature of the liquid separation device is greater than or equal to a first preset temperature, the operating power of the heating device is 0; when the air outlet temperature of the liquid separation device is more than or equal to the second preset temperature and less than the first preset temperature, the operation power of the heating device is the first operation power; when the air outlet temperature of the liquid separation device is smaller than a second preset temperature, the operating power of the heating device is the second operating power; the first preset temperature is higher than the second preset temperature, and the first operation power is lower than the second operation power.
In a preferred embodiment of the present application, after the anti-effusion control of the system by the liquid separation device, the method further comprises: detecting whether a defrosting condition is met by the system; when the system meets defrosting conditions, a bypass branch is opened to defrost the outdoor heat exchanger; one end of the bypass branch is connected with the exhaust side of the compressor, and the other end of the bypass branch is connected with the outdoor heat exchanger and is used for directly connecting refrigerant discharged by the compressor to the outdoor heat exchanger to defrost the outdoor heat exchanger when the system enters defrosting.
Further, when opening the bypass branch and defrosting the outdoor heat exchanger, the method further comprises the following steps: controlling the heating device to start working, and heating the liquid refrigerant in the liquid separation device into a gas refrigerant; and controlling the second exhaust valve to be opened, and sending the gas refrigerant into an enthalpy-increasing port of the compressor. Meanwhile, when the system is defrosted, the heating device operates according to the preset maximum operating power. The arrangement of the embodiment is to increase the air suction amount of the compressor, further improve the heat exchange amount and improve the defrosting effect.
When the system is subjected to defrosting, the refrigerant flowing out of the compressor enters the indoor heat exchanger according to a normal channel, and the refrigerant generated by the compressor is led into the outdoor heat exchanger through the bypass branch, so that the outdoor heat exchanger is defrosted, and the defrosting of the outdoor heat exchanger is realized under the condition that the indoor heat exchange requirement is met, so that the problem that the temperature fluctuation is large due to frosting of an air conditioning system in the prior art is effectively solved, the continuous heating of an inner machine of a unit is ensured, and the indoor environment temperature is ensured to be stable.
Optionally, after defrosting the outdoor heat exchanger or after anti-effusion control of the system, the method further comprises: and opening an air balance valve at each interval for preset time to balance the internal pressure of the liquid separating device.
In the application, the control method of the system is divided into normal heating operation, anti-effusion control and defrosting operation.
1. Normal heating operation
As shown in FIG. 3, the bypass branch and the liquid separating device do not participate in the operation. The refrigerant is subjected to work by the compressor, directly enters the inner machine for condensation and heating, returns to the heat exchanger of the outer machine for evaporation and heat absorption, and then flows through the steam separator to return to the compressor.
2. Anti-hydrops control
The refrigerant flows as shown in figures 4 and 5, the bypass branch does not work, and the liquid separating device participates in control.
Entering this control condition: under heating mode, the control action is executed when the temperature of the steam inlet pipe and the temperature of the steam outlet pipe are respectively 16 and 15 ℃ or more than A ℃.
Control action 1: enthalpy increasing control for unit entering
The control method is adopted when the enthalpy increasing control of the system is detected. The flow of the refrigerant is shown in fig. 4, the liquid discharge valve 10, the exhaust valve 11 are opened, the exhaust valve 17 is closed, the liquid refrigerant in the vapor separation flows into the liquid separation device, the synchronous heating device starts to work, the liquid refrigerant in the liquid separation device is heated to be medium-pressure gas, and then the medium-pressure gas enters the medium-pressure cavity of the compressor for secondary compression through the enthalpy-spraying pipeline.
Control action 2: enthalpy increasing control for machine set without entering
The control method is adopted when the system is detected to be unnecessary to perform enthalpy increasing control. As shown in fig. 5, the liquid refrigerant flows into the liquid separating device by opening the liquid discharging valve 10, the air discharging valve 17 and closing the air discharging valve 11, the synchronous heating device starts to work, the liquid refrigerant in the liquid separating device is heated to medium pressure gas, and then is mixed with the refrigerant at the air separating outlet and returns to the air suction port of the compressor.
After entering the anti-dropsy control, the gas balance 13 is started once at each interval Ts, so that the smooth liquid separation is ensured.
The power of the heating device can be adjusted, and judgment is carried out according to the gas outlet temperature 14 of the liquid separating device:
| T air outlet | Electric heating power |
| T Air outlet ≥C | 0 |
| B≤T Air outlet ＜C | M |
| T Air outlet ＜B | N |
Wherein M < N.
3. Defrosting operation
The flow of the refrigerant is shown in fig. 6. The bypass branch and the liquid separating device are both engaged in working.
The bypass valve 7 is opened, and the high-temperature refrigerant flows through the bypass branch and enters the outdoor heat exchanger 4 to defrost the heat exchanger, and then flows through the four-way valve 3 and returns to the steam separator 8.
After defrosting, in order to realize rapid defrosting, enthalpy increasing control is forced to enter at the moment: the liquid discharge valve 10, the exhaust valve 11 are opened, the exhaust valve 17 is closed, the liquid refrigerant in the vapor separation flows into the liquid separation device, the synchronous heating device starts to work, the liquid refrigerant in the liquid separation device is heated to medium pressure gas, and then the medium pressure gas enters the medium pressure cavity of the compressor through the enthalpy injection pipeline for secondary compression.
Entering the control, the electric heating power at the bottom of the liquid separating device can be forced to be executed according to the maximum level, at the moment, the indoor heat exchanger and the outdoor heat exchanger are both used as condensation sides, medium-pressure liquid refrigerant in the system is increased, the electric heating power is increased, the evaporation heat exchange amount is supplemented, and the unit heating amount is ensured.
Example 3
Based on the air conditioner control system provided in the above embodiment 1, there is also provided an air conditioner in a preferred embodiment 3 of the present application, including the air conditioner control system as described above.
In the above embodiment, there is provided an air conditioner control system for continuous heating, including: the liquid separation device receives liquid refrigerant separated by the gas-liquid separator, avoids the problem of liquid accumulation possibly occurring in the gas-liquid separator, converts the liquid refrigerant into gaseous refrigerant and then sends the gaseous refrigerant into the compressor, improves the air suction amount of the compressor, comprises the air suction amount of the compressor during defrosting, effectively solves the problem that an air conditioning system in the prior art has larger temperature fluctuation due to liquid accumulation or frosting, ensures continuous heating of an inner machine of the unit, and ensures stable indoor environment temperature.
Example 4
Based on the air conditioner control method provided in the above embodiment 2, in a preferred embodiment 4 of the present application, there is also provided a computer device including a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the air conditioner control method as described above when executing the program.
In the above embodiment, there is provided an air conditioner control method for continuous heating, in which by detecting whether a system satisfies an anti-liquid accumulation control condition, when the system satisfies the anti-liquid accumulation control condition, liquid accumulation control is performed on the system by a liquid separation device. The internal machine of the unit is ensured to continuously heat, and the indoor environment temperature is ensured to be stable.
Example 5
Based on the air conditioner control method provided in the above-described embodiment 2, there is also provided in a preferred embodiment 5 of the present application a storage medium containing computer-executable instructions for performing the air conditioner control method as described above when executed by a computer processor.
In the above embodiment, there is provided an air conditioner control method for continuous heating, in which by detecting whether a system satisfies an anti-liquid accumulation control condition, when the system satisfies the anti-liquid accumulation control condition, liquid accumulation control is performed on the system by a liquid separation device. The internal machine of the unit is ensured to continuously heat, and the indoor environment temperature is ensured to be stable.
Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It is to be understood that the application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (19)
1. An air conditioner control system, includes compressor, gas-liquid separator, outdoor heat exchanger, its characterized in that still includes:
one end of the liquid separating device is connected with the gas-liquid separator, and the other end of the liquid separating device is connected with the compressor and is used for receiving liquid refrigerant separated by the gas-liquid separator, converting the liquid refrigerant into gaseous refrigerant and then sending the gaseous refrigerant into the compressor; the outlet of the liquid separation device is connected with the enthalpy increasing port of the compressor through a first exhaust valve and is used for conveying the gaseous refrigerant in the liquid separation device into the enthalpy increasing port of the compressor to realize enthalpy increasing control.
2. The system of claim 1, wherein the system further comprises:
and one end of the bypass branch is connected with the exhaust side of the compressor, and the other end of the bypass branch is connected with the outdoor heat exchanger and is used for directly connecting the refrigerant discharged by the compressor into the outdoor heat exchanger to defrost the outdoor heat exchanger when the system is defrosted.
3. The system of claim 1, wherein the liquid separation device further comprises:
and the heating device is used for heating the liquid refrigerant into a gaseous refrigerant.
4. A system according to claim 3, wherein the outlet of the liquid separating device is connected to the air suction port of the compressor through a second exhaust valve, and is used for delivering the gaseous refrigerant in the liquid separating device to the air suction port of the compressor, so as to realize liquid accumulation prevention control.
5. The system of claim 1, wherein the outlet of the liquid separation device is further connected to the outlet of the gas-liquid separator via a gas balance valve for balancing the internal pressure of the liquid separation device.
6. The system of claim 2, wherein the bypass branch is provided with a bypass valve for entering an open state when the system enters defrosting, and directly passing part of refrigerant discharged from the compressor into the outdoor heat exchanger to defrost the outdoor heat exchanger.
7. An air conditioner control method applied to the air conditioner control system according to any one of claims 1 to 6, comprising:
detecting whether the system meets the control condition of preventing effusion;
when the system meets the anti-effusion control condition, the liquid separating device is used for controlling the system to prevent effusion.
8. The method of claim 7, wherein the anti-dropsy control conditions comprise: the difference value between the inlet pipe temperature and the outlet pipe temperature of the gas-liquid separator is larger than or equal to a preset temperature difference.
9. The method of claim 7, wherein the anti-dropsy control of the system by a liquid splitting device comprises:
and the liquid refrigerant separated by the gas-liquid separator is received by the liquid separating device, is converted into a gaseous refrigerant, and is sent to the compressor.
10. The method of claim 9, wherein feeding into the compressor comprises:
detecting whether the system needs enthalpy increasing control;
if the liquid separation device is provided with the vapor compression device, controlling the first exhaust valve to be opened, and sending the gaseous refrigerant in the liquid separation device into an enthalpy increasing port of the compressor;
otherwise, the second exhaust valve is controlled to be opened, and the gaseous refrigerant in the liquid separation device is sent to the air suction port of the compressor.
11. The method of claim 9, wherein heating the liquid refrigerant to a gaseous refrigerant comprises: and controlling the heating device to start working, and heating the liquid refrigerant in the liquid separation device into a gas refrigerant.
12. The method of claim 11, wherein the operating power of the heating device is adjusted based on the outlet temperature of the liquid separation device.
13. The method of claim 12, wherein the operating power of the heating device is adjusted based on the outlet temperature of the liquid separation device, comprising:
when the air outlet temperature of the liquid separation device is greater than or equal to a first preset temperature, the operation power of the heating device is 0;
when the air outlet temperature of the liquid separation device is more than or equal to the second preset temperature and less than the first preset temperature, the operation power of the heating device is the first operation power;
when the air outlet temperature of the liquid separation device is smaller than a second preset temperature, the operating power of the heating device is the second operating power;
wherein the first preset temperature is greater than the second preset temperature, and the first operating power is less than the second operating power.
14. The method of claim 7, further comprising, after the anti-pooling control of the system by the liquid splitting device:
detecting whether a defrosting condition is met by the system;
when the system meets defrosting conditions, a bypass branch is opened to defrost the outdoor heat exchanger; and one end of the bypass branch is connected with the exhaust side of the compressor, and the other end of the bypass branch is connected with the outdoor heat exchanger, so that when the system is subjected to defrosting, the refrigerant discharged by the compressor is directly communicated into the outdoor heat exchanger, and defrosting is performed on the outdoor heat exchanger.
15. The method of claim 14, wherein, when opening the bypass branch to defrost the outdoor heat exchanger, further comprising:
controlling a heating device to start working, and heating the liquid refrigerant in the liquid separation device into a gas refrigerant;
and controlling the second exhaust valve to be opened, and sending the gas refrigerant into an enthalpy-increasing port of the compressor.
16. The method of claim 14, wherein after defrosting the outdoor heat exchanger or after anti-effusion control of the system, the method further comprises:
and opening an air balance valve at each preset interval for balancing the internal pressure of the liquid separating device.
17. An air conditioner comprising the air conditioner control system according to any one of claims 1 to 6.
18. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the air conditioning control method according to any one of claims 7 to 16 when executing the program.
19. A storage medium containing computer executable instructions which, when executed by a computer processor, are for performing the air conditioning control method of any one of claims 7 to 16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910218610.1A CN109798701B (en) | 2019-03-21 | 2019-03-21 | Air conditioner control system and method for continuous heating and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910218610.1A CN109798701B (en) | 2019-03-21 | 2019-03-21 | Air conditioner control system and method for continuous heating and air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109798701A CN109798701A (en) | 2019-05-24 |
| CN109798701B true CN109798701B (en) | 2023-09-12 |
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| CN110346665B (en) * | 2019-07-15 | 2021-08-06 | 上海交通大学 | Wide-temperature-range low-temperature environment testing device |
| CN110529965B (en) * | 2019-09-09 | 2022-02-01 | 宁波奥克斯电气股份有限公司 | Low-temperature heating air-conditioning system and control method thereof |
| CN110736272A (en) * | 2019-09-26 | 2020-01-31 | 青岛海尔空调器有限总公司 | Control method and control device for air make-up enthalpy increase of air conditioner and air conditioner |
| CN110736273A (en) * | 2019-09-26 | 2020-01-31 | 青岛海尔空调器有限总公司 | Control method and control device for air make-up enthalpy increase of air conditioner and air conditioner |
| CN110736274A (en) * | 2019-09-26 | 2020-01-31 | 青岛海尔空调器有限总公司 | Control method and control device for air make-up enthalpy increase of air conditioner and air conditioner |
| CN110645746B (en) * | 2019-10-23 | 2024-03-19 | 珠海格力电器股份有限公司 | Continuous heating control system and method and air conditioning equipment |
| CN110645745A (en) * | 2019-10-23 | 2020-01-03 | 珠海格力电器股份有限公司 | Air conditioner capable of continuously heating and control method thereof |
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| CN110906580A (en) * | 2019-11-27 | 2020-03-24 | 青岛海尔空调电子有限公司 | Control method of air conditioning system |
| CN111306855B (en) * | 2020-02-26 | 2021-01-08 | 珠海格力电器股份有限公司 | Refrigerant heating control method and device for improving stability and air conditioning equipment |
| CN111197877B (en) * | 2020-02-26 | 2023-12-19 | 珠海格力电器股份有限公司 | Pressure regulator, outdoor unit, air conditioning system and control method of air conditioning system |
| CN111412694A (en) * | 2020-03-26 | 2020-07-14 | 宁波奥克斯电气股份有限公司 | Condenser, air conditioner defrosting control method and air conditioner |
| CN111578442B (en) * | 2020-05-12 | 2022-06-17 | 宁波奥克斯电气股份有限公司 | Liquid return prevention control method and device for compressor and air conditioner |
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