CN113483444A - Compressor shutdown control method, compressor startup control method and air conditioner - Google Patents
Compressor shutdown control method, compressor startup control method and air conditioner Download PDFInfo
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- CN113483444A CN113483444A CN202110684481.2A CN202110684481A CN113483444A CN 113483444 A CN113483444 A CN 113483444A CN 202110684481 A CN202110684481 A CN 202110684481A CN 113483444 A CN113483444 A CN 113483444A
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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
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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
- F24F11/62—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
- F24F11/62—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
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
- F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
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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
- F24F11/88—Electrical aspects, e.g. circuits
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention provides a compressor stop control method, a starting control method and an air conditioner, wherein the compressor stop control method comprises the following steps: s1, the compressor receives a stop instruction; s2, judging whether the shutdown instruction is an exhaust protection shutdown instruction; if yes, go to S3; s3, the air conditioner operates according to the first operation state and operates for t1 time; s4, detecting the current exhaust temperature Tnow, and judging whether the Tnow is larger than or equal to a first preset temperature T1; if yes, go to S5; if not, the compressor is stopped, and the outer fan is closed; s5, controlling the four-way valve to change direction, and running for t2 time; then controlling the four-way valve to recover to the state before reversing, stopping the compressor and closing the outer fan; the invention accelerates the balance of the refrigerant pressure difference of the compressor and can also quickly cool the compressor, thereby reducing the temperature to the proper temperature and the balance pressure as much as possible before the next start of the compressor, reducing the influence on the next start, being beneficial to shortening the time interval of the next start of the compressor and enhancing the use experience of users on the air conditioner.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a compressor shutdown control method, a compressor startup control method and an air conditioner.
Background
The air conditioner is indispensable electrical equipment in people's daily life, has diversified structural style. With the continuous improvement of the industrial design level and the application of new processes, new materials, new shapes and new technologies to air conditioners, not only various air conditioners are developed, but also the control methods related to the air conditioners are correspondingly improved.
In the prior art, when an air conditioner operates in a high-temperature high-load environment, the exhaust temperature of a compressor is often high, the compressor is in a relatively sealed space at the moment, the heat dissipation is poor, the temperature of a cylinder body is reduced slowly, if the compressor is protected by exhaust or is frequently started and stopped, the exhaust temperature of the compressor is still high, the abnormal stop is caused when the compressor is started again, and the fault locking is easily triggered.
When the exhaust protection is triggered, the compressor is often directly stopped to operate, and then high-temperature components such as a compressor cylinder body and an exhaust pipe are cooled, so that the exhaust temperature of the compressor can be reduced when the compressor is started next time, and the exhaust protection is still triggered after the compressor is started again. Taking patent applications CN110145843A and CN112594885A as examples, both disclose a control method of an air conditioner, which controls a compressor of the air conditioner to stop operating after receiving a stop instruction for instructing the compressor to stop operating, and then controls an outdoor fan to cool the compressor according to an exhaust temperature of the compressor.
However, in the control method in the prior art, the operation of the compressor is directly stopped when the exhaust protection is triggered, and at the moment, the refrigerant medium in the compressor still has a higher pressure difference, so that the operation of the compressor is directly stopped, which is not only unfavorable for reducing the exhaust temperature of the compressor as soon as possible, but also increases the time required for cooling the compressor, is unfavorable for shortening the time interval of the next start of the compressor, and influences the use experience of a user on the air conditioner.
Meanwhile, in the process of restarting the compressor in the prior art, the compressor is usually started directly after the actual condition of the air conditioner meets the relevant preset condition, meanwhile, each relevant part usually adopts the preset fixed operation parameter, the overshoot of the air conditioning system caused by the preset fixed parameter is very easy to cause, the risk of triggering the exhaust protection by restarting the compressor is not reduced, the reliability of the operation of the air conditioner is not improved, and the use feeling of a user on the air conditioner is influenced.
Disclosure of Invention
In view of the above, the present invention is directed to a compressor shutdown control method, a compressor startup control method, and an air conditioner, so as to solve the problems in the prior art that after the exhaust protection is triggered, the time required for cooling the compressor is long, and the exhaust protection is still easily triggered even when the compressor is restarted.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a compressor shutdown control method comprising: s1, the compressor receives a stop instruction; s2, judging whether the shutdown instruction is an exhaust protection shutdown instruction; if yes, go to step S3; s3, the air conditioner operates according to the first operation state and operates for t1 time; s4, detecting the current exhaust temperature Tnow, and judging whether the Tnow is larger than or equal to a first preset temperature T1; if yes, go to step S5; if not, the compressor is stopped, and the outer fan is closed; s5, controlling the four-way valve to change direction, and running for t2 time; then controlling the four-way valve to recover to the state before reversing, stopping the compressor and closing the outer fan; the first running state is an air conditioner running state for reducing the refrigerant pressure difference of the compressor under the condition that the compressor maintains the lowest load state; further, the first operating state includes: and (3) reducing the frequency of the compressor to the lowest operation frequency Fmin, opening the inner valve to the maximum opening P1max of the inner valve, opening the outer valve to the maximum opening P2max of the outer valve, stopping the operation of the inner fan, and maintaining the current wind gear of the outer fan at the wind speed. So that the present application does not shut down the compressor directly after the vent protection shutdown is determined; after the refrigerant pressure difference of the compressor is reduced through the step S3, the current exhaust temperature Tnow is continuously judged, if Tnow is less than T1, the current exhaust temperature is rapidly reduced in the process of reducing the refrigerant pressure difference of the compressor, the compressor can be directly shut down, an external fan is shut down, and the exhaust protection risk caused by overhigh temperature of the cylinder body during low-time starting is favorably reduced; if Tnow is greater than or equal to T1, it indicates that the current exhaust temperature is still high in the process of reducing the refrigerant pressure difference of the compressor, and the compressor load can be quickly reduced by reversing the four-way valve (generally, the four-way valve is powered on in a cooling mode and powered off in a heating mode), so that the refrigerant pressure difference of the compressor can be further balanced, the compressor can be quickly cooled, the time required by cooling the compressor is shortened, the temperature is reduced to a proper temperature and a balanced pressure as much as possible before the compressor is started next time, the influence on the next start is reduced, the time interval of the next start of the compressor is favorably shortened, and the use experience of a user on the air conditioner is enhanced.
Further, the compressor stop control method includes: when the determination result of step S2 is no, execution proceeds to step S6; s6, detecting the current exhaust temperature Tnow in real time, and judging whether the Tnow is larger than or equal to a second preset temperature T2; if yes, go to step S7; if not, the compressor is stopped, and the outer fan is closed; s7, operating the air conditioner in a second operation state; judging whether the air conditioner meets a first judgment condition, if so, stopping the compressor, closing the outer fan, and if not, returning to the step S7; the second operating state is the same as the first operating state. Further, the first determination condition includes: the air conditioner maintains the first operation state for a time T3, and/or Tnow < a third preset temperature T3. Therefore, under the condition of normal shutdown, the compressor is not directly shut down, the current exhaust temperature Tnow is judged, if Tnow is less than T2, the condition that Tnow is normal is indicated, the compressor can be directly shut down, and the outer fan is closed; if Tnow is more than or equal to T2, it is still higher that current exhaust temperature is described, and this application can promote the balance of compressor refrigerant differential pressure on the one hand through reducing compressor refrigerant differential pressure this moment, and on the other hand can cool down the compressor fast, makes the compressor temperature shut down again after will normal temperature range, ensures that the compressor carries out the gradual process of shutting down steadily, is favorable to protecting the compressor to a certain extent, is favorable to guaranteeing the life of compressor.
A compressor starting control method comprises the following steps: b1, the compressor receives a starting instruction; b2, judging whether the latest shutdown is the exhaust protection shutdown; if yes, go to step B3; b3, judging whether the exhaust protection shutdown frequency in the latest rated duration is less than or equal to the rated frequency, and detecting the current exhaust temperature Tnow; if yes, go to step B4; if not, go to step B5; b4, judging whether Tnow is less than or equal to a fourth preset temperature T4; if so, the air conditioner operates according to a third operation state; if not, the air conditioner operates according to a fourth operation state; b5, judging whether Tnow is less than or equal to a fourth preset temperature T4; if so, the air conditioner operates according to a fifth operation state; if not, the air conditioner operates according to a sixth operation state. Further, the third operating state includes: the compressor frequency is adjusted to be the correction target frequency Fin without exhaust protection, the opening of the inner machine valve is adjusted to be the correction target opening P1in without exhaust protection, and the opening of the outer machine valve is adjusted to be the correction target opening P2in without exhaust protection; the fourth operating state includes: the frequency of the compressor is adjusted to be the operation frequency Fs when the compressor receives the stop instruction for the last time, the opening of the inner valve is adjusted to be the opening P1s of the inner valve when the stop instruction is received for the last time, and the opening of the outer valve is adjusted to be the opening P2s of the outer valve when the stop instruction is received for the last time; the fifth operating state includes: the frequency of the compressor is adjusted to be the operation frequency Fs when the compressor receives the stop instruction for the last time, the opening degree of the inner valve is adjusted to be the opening degree P1s of the inner valve when the compressor receives the stop instruction for the last time, and the opening degree of the outer valve is adjusted to be the opening degree P2s of the outer valve when the compressor receives the stop instruction for the last time; the sixth operating state includes: the compressor frequency is adjusted to be Fs + (Fs-Fmin) (Tnow-T3)/(T3-T5), the internal valve opening is adjusted to be P1s + (P1s-P1max) (Tnow-T3)/(T3-T5), and the external valve opening is adjusted to be P2s + (P2s-P2max) (Tnow-T3)/(T3-T5); wherein Fmin is the lowest operation frequency of the compressor, P1max is the maximum opening degree of the internal valve, P2max is the maximum opening degree of the external valve, and T3 is a third preset temperature; t5 is a fifth preset temperature. Therefore, after the compressor receives the starting instruction, the application does not directly adopt the preset fixed operation data to directly start the compressor, but by determining whether the most recent shutdown was an exhaust-protected shutdown, when the most recent shutdown was an exhaust-protected shutdown, the air conditioner continuously carries out comprehensive analysis and treatment on the exhaust protection shutdown times and the current exhaust temperature Tnow within the rated time, the running parameters of the air-conditioner related components are dynamically adjusted according to different judgment conditions, so that in the starting stage of the compressor, the running parameters of the air-conditioner related components can be more fit with the current air-conditioner condition, the condition that the air-conditioner system overshoots again due to the preset fixed parameters can be effectively avoided, the risk that the compressor is started again to trigger exhaust protection is reduced, the reliability of starting and running of the air-conditioner is improved, and the use feeling of a user on the air-conditioner is enhanced.
Further, the compressor starting control method comprises the following steps: when the determination result of step B2 is no, continuing to execute step B6; b6, detecting the current exhaust temperature Tnow in real time, and judging whether the Tnow is less than or equal to a fourth preset temperature T4; if so, the air conditioner operates according to a seventh operation state; and if not, the air conditioner operates according to the eighth operation state. Wherein the seventh operating state comprises: the compressor frequency is the correction target frequency Fin without exhaust protection, the opening of the inner machine valve is the correction target opening P1in without exhaust protection, and the opening of the outer machine valve is the correction target opening P2in without exhaust protection; the eighth operating state includes: the compressor frequency is an operation frequency Fs when the compressor receives the stop instruction last time, the opening degree of the inner valve is an opening degree P1s of the inner valve when the stop instruction is received last time, and the opening degree of the outer valve is an opening degree P2s of the outer valve when the stop instruction is received last time. Therefore, under the condition that the last shutdown is the normal shutdown, the compressor is not directly started in the method, the current exhaust temperature Tnow is analyzed, the operation parameters of the air conditioner related components are dynamically adjusted according to different judgment conditions, the operation parameters of the air conditioner related components can be more fit with the current air conditioner condition, on one hand, the compressor and the air conditioner are ensured to be stably started, the service life of the air conditioner related components is favorably guaranteed, on the other hand, the reliability of the air conditioner starting operation can be improved, and the use feeling of a user on the air conditioner is favorably enhanced.
An air conditioner comprising a computer readable storage medium storing a computer program and a processor, the computer program being read and executed by the processor to implement the compressor shutdown control method and/or the compressor startup control method.
A computer-readable storage medium storing a computer program which, when read and executed by a processor, implements the compressor shutdown control method and/or the compressor startup control method.
Compared with the prior art, the compressor shutdown control method, the compressor startup control method and the air conditioner have the following advantages:
according to the compressor shutdown control method, the compressor startup control method and the air conditioner, in the shutdown control process, on one hand, the balance of refrigerant pressure difference of the compressor can be further accelerated, on the other hand, the compressor can be rapidly cooled, so that the time required for cooling the compressor is shortened, the temperature is reduced to the proper temperature and the pressure is balanced as much as possible before the next compressor is started, the influence on the next start is reduced, the time interval of the next start of the compressor is favorably shortened, and the use feeling of a user on the air conditioner is enhanced; in the starting control process, the running parameters of the air conditioner related components can be dynamically adjusted, so that in the starting stage of the compressor, the running parameters of the air conditioner related components can be more fit with the current air conditioner situation, the situation that the air conditioner system overshoots again due to the fact that preset fixed parameters occur can be effectively avoided, the risk that the compressor is started again to trigger exhaust protection is reduced, the reliability of starting and running of the air conditioner is improved, and the use feeling of a user on the air conditioner is enhanced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart of a compressor stop control method according to an embodiment of the present invention;
fig. 2 is a flowchart of a compressor start-up control method according to an embodiment of the present invention.
Detailed Description
The inventive concepts of the present disclosure will be described hereinafter using terms commonly employed by those skilled in the art to convey the substance of their work to others skilled in the art. These inventive concepts may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. Meanwhile, the compressor shutdown control method and the compressor startup control method in the application belong to air conditioner control methods in the compressor startup and shutdown control process in practice, and are not limited to the control process under the exhaust protection condition; for the shutdown process of the compressor, the shutdown can be caused by exhaust protection, or the shutdown can be caused by reaching the temperature, shutdown and the like, or other shutdown conditions; correspondingly, the starting process of the compressor can also be starting after exhaust protection, or starting when the temperature is reached, normal starting of the air conditioner and the like, or other starting conditions.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In the prior art, the compressor is usually directly stopped when the exhaust protection is triggered, and the refrigerant medium in the compressor still has higher pressure difference at the moment, so that the compressor is directly stopped, the exhaust temperature of the compressor is not reduced as soon as possible, the required time for cooling the compressor is prolonged, and the next starting time of the compressor is not shortened; meanwhile, in the process of restarting the compressor, the compressor is usually started directly after the actual condition of the air conditioner meets the relevant preset condition, and meanwhile, each relevant component usually adopts the preset fixed operation parameter, so that the preset fixed parameter is easy to cause the overshoot of the air conditioning system again, the risk of triggering the exhaust protection when restarting the compressor is not reduced, and the reliability of the operation of the air conditioner is not improved; the stop and start processes in the prior art certainly seriously affect the use feeling of users on the air conditioner.
In order to solve the problems that the compressor needs longer cooling time and is easy to trigger exhaust protection after the exhaust protection is triggered in the prior art, the embodiment provides a compressor stop control method and a start-up control method, and particularly provides a control method of an air conditioner, which comprises the compressor stop control method and the start-up control method; in order to facilitate understanding of related technical schemes and avoid confusion in content, the application introduces a compressor shutdown control method and a compressor startup control method separately:
as shown in fig. 1, a compressor stop control method includes:
s1, the compressor receives a stop instruction;
specifically, step S1 includes: and (4) during the operation of the compressor, the real-time monitoring of the instruction received by the compressor is kept, and after the compressor is judged to receive the stop instruction, the step S2 is executed.
The shutdown instruction comprises an exhaust protection shutdown instruction, a temperature reaching shutdown instruction, a user shutdown instruction and shutdown instructions under other conditions; the operation of the air conditioner control compressor and the sending and execution of the stop command are the prior art, and are not described herein again.
S2, judging whether the shutdown instruction is an exhaust protection shutdown instruction; if yes, go to step S3; if not, go to step S6;
consistent with the prior art, the discharge protection shutdown refers to a situation where the compressor discharge temperature is too high, such that a forced compressor shutdown is required to protect the compressor.
S3, the air conditioner operates according to the first operation state and operates for t1 time;
the first operation state is an air conditioner operation state in which the refrigerant pressure difference of the compressor is reduced under the condition that the compressor maintains the lowest load state, and is used for reducing the refrigerant pressure difference of the compressor to the greatest extent before the compressor is stopped, so that the exhaust temperature of the compressor can be reduced as soon as possible subsequently, the time required by the temperature reduction of the compressor is shortened, the time interval of the next start of the compressor is shortened, and the use feeling of a user on the air conditioner is enhanced; meanwhile, in the process of reducing the refrigerant pressure difference of the compressor, the compressor is kept in the lowest load state, and the compressor is protected to the greatest extent.
Specifically, the first operating state includes: and (3) reducing the frequency of the compressor to the lowest operation frequency Fmin, opening the inner valve to the maximum opening P1max of the inner valve, opening the outer valve to the maximum opening P2max of the outer valve, stopping the operation of the inner fan, and maintaining the current wind gear of the outer fan at the wind speed. t1 is 10s to 120s, preferably 60 s.
S4, detecting the current exhaust temperature Tnow, and judging whether the Tnow is larger than or equal to a first preset temperature T1; if yes, go to step S5; if not, the compressor is stopped, and the outer fan is closed;
t1 is less than the exhaust protection shutdown temperature, T1 is 80 ℃ to 110 ℃, preferably 90 ℃.
S5, controlling the four-way valve to change direction, and running for t2 time; then controlling the four-way valve to recover to the state before reversing, stopping the compressor and closing the outer fan;
t2 is 10s to 180s, preferably 60 s.
Wherein the present application does not directly shut down the compressor after determining the discharge protection shutdown; after the refrigerant pressure difference of the compressor is reduced through the step S3, the current exhaust temperature Tnow is continuously judged, if Tnow is less than T1, the current exhaust temperature is rapidly reduced in the process of reducing the refrigerant pressure difference of the compressor, the compressor can be directly shut down, an external fan is shut down, and the exhaust protection risk caused by overhigh temperature of the cylinder body during low-time starting is favorably reduced; if Tnow is greater than or equal to T1, it indicates that the current exhaust temperature is still high in the process of reducing the refrigerant pressure difference of the compressor, and the compressor load can be quickly reduced by reversing the four-way valve (generally, the four-way valve is powered on in a cooling mode and powered off in a heating mode), so that the refrigerant pressure difference of the compressor can be further balanced, the compressor can be quickly cooled, the time required by cooling the compressor is shortened, the temperature is reduced to a proper temperature and a balanced pressure as much as possible before the compressor is started next time, the influence on the next start is reduced, the time interval of the next start of the compressor is favorably shortened, and the use experience of a user on the air conditioner is enhanced.
S6, detecting the current exhaust temperature Tnow in real time, and judging whether the Tnow is larger than or equal to a second preset temperature T2; if yes, go to step S7; if not, the compressor is stopped, and the outer fan is closed;
t2 is from 90 ℃ to 110 ℃ and preferably 100 ℃.
S7, operating the air conditioner in a second operation state; and judging whether the air conditioner meets a first judgment condition, if so, stopping the compressor, and turning off the outer fan, otherwise, returning to the step S7.
The second running state is an air conditioner running state for reducing the refrigerant pressure difference of the compressor under the condition that the compressor maintains the lowest load state; preferably, the second operating state in step S7 is the same as the first operating state in step S3.
The first determination condition includes: the air conditioner maintains the first operation state for a time T3, and/or Tnow < a third preset temperature T3. Wherein t3 is 30s to 180s, preferably 60 s; t3 is 60 ℃ to 90 ℃ and preferably 70 ℃.
Therefore, under the condition of normal shutdown (in the application, especially under the condition of non-exhaust protection shutdown), the compressor is not directly shut down, but the current exhaust temperature Tnow is judged, if Tnow is less than T2, the Tnow is normal, the compressor can be directly shut down, and the outer fan is closed; if Tnow is more than or equal to T2, it is still higher that current exhaust temperature is described, and this application can promote the balance of compressor refrigerant differential pressure on the one hand through reducing compressor refrigerant differential pressure this moment, and on the other hand can cool down the compressor fast, makes the compressor temperature shut down again after will normal temperature range, ensures that the compressor carries out the gradual process of shutting down steadily, is favorable to protecting the compressor to a certain extent, is favorable to guaranteeing the life of compressor.
In addition, in the compressor shutdown control method, parameters such as T1, T2, T3, T1, T2, and T3 are preset data of the air conditioner when the air conditioner leaves the factory, and may be determined according to actual performance of related components and actual experimental results of the air conditioner manufacturer.
As shown in fig. 2, a method for controlling the start-up of a compressor includes:
b1, the compressor receives a starting instruction;
specifically, step B1 includes: and in the running process of the compressor, the real-time monitoring of the instruction received by the compressor is kept, and after the compressor receives the starting instruction, the step B2 is executed.
The starting instruction comprises a starting instruction after exhaust protection, a temperature reaching starting instruction, a user starting instruction and other starting instructions under other conditions; the operation of the air conditioner control compressor and the sending and execution of the starting instruction are the prior art, and are not described herein again.
B2, judging whether the latest shutdown is the exhaust protection shutdown; if yes, go to step B3; if not, go to step B6;
b3, judging whether the exhaust protection shutdown frequency in the latest rated duration is less than or equal to the rated frequency, and detecting the current exhaust temperature Tnow; if yes, go to step B4; if not, go to step B5;
the rated time is a preset parameter when the air conditioner leaves a factory, and in the application, the rated time is 0.5 h-2 h, preferably 1 h. The rated times are preset parameters when the air conditioner leaves a factory, and in the application, the rated times are 1-3 times, preferably 1 time.
B4, judging whether Tnow is less than or equal to a fourth preset temperature T4; if so, the air conditioner operates according to a third operation state; if not, the air conditioner operates according to a fourth operation state;
wherein T4 is 80 ℃ to 100 ℃, preferably 90 ℃.
The third operating state includes: the compressor frequency is adjusted to the correction target frequency Fin without exhaust protection, the opening of the inner unit valve is adjusted to the correction target opening P1in without exhaust protection, and the opening of the outer unit valve is adjusted to the correction target opening P2in without exhaust protection.
The fourth operating state includes: the compressor frequency is adjusted to the operating frequency Fs when the compressor has received the stop instruction the last time, the opening of the internal valve is adjusted to the opening P1s of the internal valve when the compressor has received the stop instruction the last time, and the opening of the external valve is adjusted to the opening P2s of the external valve when the compressor has received the stop instruction the last time.
B5, judging whether Tnow is less than or equal to a fourth preset temperature T4; if so, the air conditioner operates according to a fifth operation state; if not, the air conditioner operates according to a sixth operation state;
wherein T4 is 80 ℃ to 100 ℃, preferably 90 ℃.
The fifth operating state includes: the compressor frequency is adjusted to an operation frequency Fs when the compressor has received the stop instruction last time, the opening of the inner valve is adjusted to an opening P1s when the compressor has received the stop instruction last time, and the opening of the outer valve is adjusted to an opening P2s when the compressor has received the stop instruction last time.
The sixth operating state includes: the compressor frequency is adjusted to be Fs + (Fs-Fmin) (Tnow-T3)/(T3-T5), the internal valve opening is adjusted to be P1s + (P1s-P1max) (Tnow-T3)/(T3-T5), and the external valve opening is adjusted to be P2s + (P2s-P2max) (Tnow-T3)/(T3-T5); wherein, Fs, P1s, P2s are consistent with the relevant parameters in the fourth operation state, Fmin is the lowest operation frequency of the compressor, P1max is the maximum opening degree of the internal valve, and P2max is the maximum opening degree of the external valve; t3 is in accordance with T3 in the compressor shutdown control method and is from 60 ℃ to 90 ℃, preferably 70 ℃. T5 is a fifth predetermined temperature, T5 is from 90 ℃ to 110 ℃, preferably 105 ℃.
Therefore, after the compressor receives the starting instruction, the application does not directly adopt the preset fixed operation data to directly start the compressor, but by determining whether the most recent shutdown was an exhaust-protected shutdown, when the most recent shutdown was an exhaust-protected shutdown, the air conditioner continuously carries out comprehensive analysis and treatment on the exhaust protection shutdown times and the current exhaust temperature Tnow within the rated time, the running parameters of the air-conditioner related components are dynamically adjusted according to different judgment conditions, so that in the starting stage of the compressor, the running parameters of the air-conditioner related components can be more fit with the current air-conditioner condition, the condition that the air-conditioner system overshoots again due to the preset fixed parameters can be effectively avoided, the risk that the compressor is started again to trigger exhaust protection is reduced, the reliability of starting and running of the air-conditioner is improved, and the use feeling of a user on the air-conditioner is enhanced.
B6, detecting the current exhaust temperature Tnow in real time, and judging whether the Tnow is less than or equal to a fourth preset temperature T4; if so, the air conditioner operates according to a seventh operation state; and if not, the air conditioner operates according to the eighth operation state.
Wherein T4 is 80 ℃ to 100 ℃, preferably 90 ℃.
The seventh operating state comprises: the compressor frequency is the correction target frequency Fin without exhaust protection, the opening of the inner unit valve is the correction target opening P1in without exhaust protection, and the opening of the outer unit valve is the correction target opening P2in without exhaust protection.
The eighth operating state includes: the compressor frequency is an operation frequency Fs when the compressor receives the stop instruction last time, the opening degree of the inner valve is an opening degree P1s of the inner valve when the stop instruction is received last time, and the opening degree of the outer valve is an opening degree P2s of the outer valve when the stop instruction is received last time.
Therefore, under the condition that the last shutdown is a normal shutdown (in the application, especially under the condition of non-exhaust protection shutdown), the compressor is not directly started, the current exhaust temperature Tnow is analyzed and processed, and the operation parameters of the related components of the air conditioner are dynamically adjusted according to different judgment conditions, so that the operation parameters of the related components of the air conditioner can be more fit with the current air conditioner condition, on one hand, the stable startup of the compressor and the air conditioner is ensured, the service life of the related components of the air conditioner is favorably ensured, on the other hand, the reliability of the startup and operation of the air conditioner is improved, and the use feeling of a user on the air conditioner is favorably enhanced.
In addition, in the compressor starting control method, after determining that the corresponding specific operation state (including any one of the third operation state to the eighth operation state) is adopted, the air conditioner regulates and controls the corresponding compressor frequency, the opening degree of the internal machine valve and the opening degree of the external machine valve, and maintains the corresponding specific operation state to operate for t4 time, and then the air conditioner is regulated to operate in a normal operation state; and in the process that the air conditioner operates in a corresponding specific operation state, the air conditioner is not shielded and protected and fails. Wherein t4 is 3-10min, preferably 5 min. In the compressor shutdown control method, the parameters of T3, T4, T5, T4 and the like are preset data of the air conditioner when the air conditioner leaves a factory, and the values can be obtained according to the value taking condition in the application, and can also be determined according to the actual performance of related components and the actual experimental result of an air conditioner manufacturer.
The invention also provides an air conditioner which adopts the compressor stop control method and/or the compressor start control method; the air conditioner comprises a computer readable storage medium and a processor, wherein a computer program is stored in the computer readable storage medium, and the computer program is read by the processor and executed to realize the compressor stop control method and/or the compressor start-up control method. In addition, for the specific component structure of the air conditioner, the prior art can be used for reference, and the details are not repeated herein. Meanwhile, the application also provides a computer readable storage medium, wherein a computer program is stored in the computer readable storage medium, and when the computer program is read and operated by a processor, the compressor shutdown control method and/or the compressor startup control method are/is realized.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A compressor stop control method, characterized by comprising:
s1, the compressor receives a stop instruction;
s2, judging whether the shutdown instruction is an exhaust protection shutdown instruction; if yes, go to step S3;
s3, the air conditioner operates according to the first operation state and operates for t1 time;
s4, detecting the current exhaust temperature Tnow, and judging whether the Tnow is larger than or equal to a first preset temperature T1; if yes, go to step S5; if not, the compressor is stopped, and the outer fan is closed;
s5, controlling the four-way valve to change direction, and running for t2 time; then controlling the four-way valve to recover to the state before reversing, stopping the compressor and closing the outer fan;
the first operation state is an air conditioner operation state for reducing the refrigerant pressure difference of the compressor under the condition that the compressor maintains the lowest load state.
2. A compressor stop control method according to claim 1, wherein said first operating state comprises: and (3) reducing the frequency of the compressor to the lowest operation frequency Fmin, opening the inner valve to the maximum opening P1max of the inner valve, opening the outer valve to the maximum opening P2max of the outer valve, stopping the operation of the inner fan, and maintaining the current wind gear of the outer fan at the wind speed.
3. A compressor stop control method according to claim 1, characterized by comprising: when the determination result of step S2 is no, execution proceeds to step S6;
s6, detecting the current exhaust temperature Tnow in real time, and judging whether the Tnow is larger than or equal to a second preset temperature T2; if yes, go to step S7; if not, the compressor is stopped, and the outer fan is closed;
s7, operating the air conditioner in a second operation state; judging whether the air conditioner meets a first judgment condition, if so, stopping the compressor, closing the outer fan, and if not, returning to the step S7;
the second operating state is the same as the first operating state.
4. A compressor stop control method according to claim 3, wherein said first determination condition includes: the air conditioner maintains the first operation state for a time T3, and/or Tnow < a third preset temperature T3.
5. A compressor start-up control method, comprising:
b1, the compressor receives a starting instruction;
b2, judging whether the latest shutdown is the exhaust protection shutdown; if yes, go to step B3;
b3, judging whether the exhaust protection shutdown frequency in the latest rated duration is less than or equal to the rated frequency, and detecting the current exhaust temperature Tnow; if yes, go to step B4; if not, go to step B5;
b4, judging whether Tnow is less than or equal to a fourth preset temperature T4; if so, the air conditioner operates according to a third operation state; if not, the air conditioner operates according to a fourth operation state;
b5, judging whether Tnow is less than or equal to a fourth preset temperature T4; if so, the air conditioner operates according to a fifth operation state; if not, the air conditioner operates according to a sixth operation state.
6. The compressor start-up control method as set forth in claim 5, wherein the third operating state comprises: the compressor frequency is adjusted to be the correction target frequency Fin without exhaust protection, the opening of the inner machine valve is adjusted to be the correction target opening P1in without exhaust protection, and the opening of the outer machine valve is adjusted to be the correction target opening P2in without exhaust protection;
the fourth operating state includes: the frequency of the compressor is adjusted to be the operation frequency Fs when the compressor receives the stop instruction for the last time, the opening of the inner valve is adjusted to be the opening P1s of the inner valve when the stop instruction is received for the last time, and the opening of the outer valve is adjusted to be the opening P2s of the outer valve when the stop instruction is received for the last time;
the fifth operating state includes: the frequency of the compressor is adjusted to be the operation frequency Fs when the compressor receives the stop instruction for the last time, the opening degree of the inner valve is adjusted to be the opening degree P1s of the inner valve when the compressor receives the stop instruction for the last time, and the opening degree of the outer valve is adjusted to be the opening degree P2s of the outer valve when the compressor receives the stop instruction for the last time;
the sixth operating state includes: the compressor frequency is adjusted to be Fs + (Fs-Fmin) (Tnow-T3)/(T3-T5), the internal valve opening is adjusted to be P1s + (P1s-P1max) (Tnow-T3)/(T3-T5), and the external valve opening is adjusted to be P2s + (P2s-P2max) (Tnow-T3)/(T3-T5); and Fmin is the lowest operation frequency of the compressor, P1max is the maximum opening degree of the internal valve, P2max is the maximum opening degree of the external valve, T3 is a third preset temperature, and T5 is a fifth preset temperature.
7. The compressor start-up control method according to claim 5, comprising: when the determination result of step B2 is no, continuing to execute step B6;
b6, detecting the current exhaust temperature Tnow in real time, and judging whether the Tnow is less than or equal to a fourth preset temperature T4; if so, the air conditioner operates according to a seventh operation state; and if not, the air conditioner operates according to the eighth operation state.
8. The compressor startup control method according to claim 7, wherein the seventh operating state comprises: the compressor frequency is the correction target frequency Fin without exhaust protection, the opening of the inner machine valve is the correction target opening P1in without exhaust protection, and the opening of the outer machine valve is the correction target opening P2in without exhaust protection;
the eighth operating state includes: the compressor frequency is an operation frequency Fs when the compressor receives the stop instruction last time, the opening degree of the inner valve is an opening degree P1s of the inner valve when the stop instruction is received last time, and the opening degree of the outer valve is an opening degree P2s of the outer valve when the stop instruction is received last time.
9. An air conditioner comprising a computer-readable storage medium storing a computer program and a processor, wherein the computer program is read by the processor and executed to implement the compressor shutdown control method according to any one of claims 1 to 4 and/or the compressor startup control method according to any one of claims 5 to 8.
10. A computer-readable storage medium, characterized in that it stores a computer program which, when read and executed by a processor, implements the compressor shutdown control method of any one of claims 1 to 4 and/or the compressor startup control method of any one of claims 5 to 8.
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| CN114811885B (en) | 2023-08-18 |
| CN113483444B (en) | 2022-10-18 |
| CN114811885A (en) | 2022-07-29 |
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