CN111425996A - Control method of air conditioner - Google Patents
Control method of air conditioner Download PDFInfo
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- CN111425996A CN111425996A CN202010120478.3A CN202010120478A CN111425996A CN 111425996 A CN111425996 A CN 111425996A CN 202010120478 A CN202010120478 A CN 202010120478A CN 111425996 A CN111425996 A CN 111425996A
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- air conditioner
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- electronic expansion
- expansion valve
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
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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
- F24F11/52—Indication arrangements, e.g. displays
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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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 relates to the technical field of air conditioners, in particular to a control method of an air conditioner. The invention aims to solve the problem that when an air conditioner is installed, the air conditioner is damaged or a safety accident occurs because people easily ignore prompt labels or other reasons and open the air conditioner by mistake under the condition of not opening an air pipe stop valve or a liquid pipe stop valve. For this purpose, the control method of the air conditioner provided by the invention controls the air conditioner through a comparison result based on the variation of the exhaust pressure of the compressor in unit time after the air conditioner is started and a preset exhaust pressure variation threshold value, and a comparison result of the opening value of the electronic expansion valve and a set opening value. Therefore, whether the first stop valve arranged on the refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger is opened or not can be judged, and when the first stop valve is not opened, the air conditioner is closed, so that the problem that the air conditioner is damaged or a safety accident is caused by mistakenly opening the air conditioner under the condition that the first stop valve is not opened is solved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method of an air conditioner.
Background
Generally, a liquid pipe stop valve is installed between an indoor heat exchanger and an outdoor heat exchanger in an air conditioner, a gas pipe stop valve is installed between the indoor heat exchanger and a compressor, and the circulation and the stop of a refrigerant between the indoor heat exchanger and the outdoor heat exchanger are controlled through the gas pipe stop valve and the liquid pipe stop valve. When the air conditioner normally operates, the air pipe stop valve and the liquid pipe stop valve are required to be in an open state.
However, when the air conditioner is installed, people easily neglect the prompt label or other reasons, and the air conditioner is opened by mistake under the condition that the air pipe stop valve or the liquid pipe stop valve is not opened, so that the air conditioner is damaged or a safety accident occurs.
Accordingly, there is a need in the art for a new control method of an air conditioner to solve the above-mentioned problems.
Disclosure of Invention
The air conditioner is installed on the air conditioner, and the prompt label or other reasons are easily ignored, so that the air conditioner is mistakenly opened under the condition that the air pipe stop valve or the liquid pipe stop valve is not opened, and the air conditioner is damaged or a safety accident occurs.
The invention provides a control method of an air conditioner, wherein the air conditioner comprises a compressor, an indoor heat exchanger and an outdoor heat exchanger, a first stop valve and an electronic expansion valve are arranged on a refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger, and the control method comprises the following steps: acquiring the exhaust pressure of a compressor and the opening value of the electronic expansion valve; calculating the variation of the exhaust pressure in unit time after the air conditioner is started; comparing the variable quantity of the exhaust pressure with a preset exhaust pressure variable threshold; comparing the opening degree value of the electronic expansion valve with a set opening degree value; and controlling the air conditioner based on the comparison result of the variation of the exhaust pressure and the comparison result of the opening value of the electronic expansion valve.
As a preferable aspect of the control method according to the present invention, the step of "controlling the air conditioner based on a result of comparing a variation in the discharge pressure and a result of comparing an opening value of the electronic expansion valve" specifically includes: if the variation of the exhaust pressure is larger than the exhaust pressure variation threshold value and the opening value of the electronic expansion valve is smaller than the set opening value, adjusting the opening value of the electronic expansion valve to be larger than or equal to the set opening value, and continuing to control the air conditioner based on the comparison result of the variation of the exhaust pressure.
As a preferable aspect of the control method according to the present invention, the step of "controlling the air conditioner based on a result of comparing a variation in the discharge pressure and a result of comparing an opening value of the electronic expansion valve" specifically includes: if the variation of the exhaust pressure is larger than the exhaust pressure variation threshold and the opening value of the electronic expansion valve is larger than or equal to the set opening value, acquiring the duration that the variation of the exhaust pressure is larger than the exhaust pressure variation threshold; and if the duration time is greater than a preset time threshold value, closing the air conditioner.
As a preferable aspect of the control method according to the present invention, the step of "controlling the air conditioner based on the comparison result of the variation amount of the exhaust pressure" includes: obtaining the duration of the variable quantity of the exhaust pressure which is greater than the exhaust pressure variable threshold; and if the duration time is greater than a preset time threshold value, closing the air conditioner.
As a preferable technical solution of the above control method provided by the present invention, the control method further includes: and sending a prompt that the first stop valve is not opened while the air conditioner is closed.
In addition, another control method of an air conditioner provided by the present invention is a control method of an air conditioner, where the air conditioner includes a compressor, an indoor heat exchanger, and an outdoor heat exchanger, an electronic expansion valve is disposed on a refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger, and a second stop valve is disposed on a refrigerant pipeline between the indoor heat exchanger and the compressor, and the control method includes: acquiring the suction pressure of a compressor and the opening value of the electronic expansion valve; calculating the variation of the suction pressure in unit time after the air conditioner is started; comparing the variation of the suction pressure with a preset suction pressure variation threshold; comparing the opening degree value of the electronic expansion valve with a set opening degree value; and controlling the air conditioner based on the comparison result of the variation of the suction pressure and the comparison result of the opening value of the electronic expansion valve.
As a preferable aspect of the control method according to the present invention, the step of "controlling the air conditioner based on a result of comparing a change amount of the suction pressure and a result of comparing an opening degree value of the electronic expansion valve" specifically includes: and if the variation of the suction pressure is larger than a preset suction pressure variation threshold value and the opening degree value of the electronic expansion valve is smaller than a set opening degree value, adjusting the opening degree value of the electronic expansion valve to be larger than or equal to the set opening degree value, and continuously controlling the air conditioner based on the comparison result of the variation of the suction pressure.
As a preferable aspect of the control method according to the present invention, the step of "controlling the air conditioner based on a result of comparing a change amount of the suction pressure and a result of comparing an opening degree value of the electronic expansion valve" specifically includes: if the variation of the suction pressure is larger than the suction pressure variation threshold value and the opening value of the electronic expansion valve is larger than or equal to the set opening value, acquiring the duration of the suction pressure variation larger than the suction pressure variation threshold value; and if the duration time is greater than a preset time threshold value, closing the air conditioner.
As a preferable aspect of the control method according to the present invention, the step of "controlling the air conditioner based on the result of comparing the amount of change in the suction pressure" includes: acquiring the duration that the variation of the suction pressure is greater than the suction pressure variation threshold; and if the duration time is greater than a preset time threshold value, closing the air conditioner.
As a preferable technical solution of the above control method provided by the present invention, the control method further includes: and sending a prompt that the second stop valve is not opened while the air conditioner is closed.
The control method of the air conditioner provided by the invention controls the air conditioner through a comparison result based on the variation of the exhaust pressure of the compressor in unit time after the air conditioner is started and a preset exhaust pressure variation threshold value and a comparison result of the opening value of the electronic expansion valve and the set opening value. Therefore, whether the first stop valve arranged on the refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger is opened or not can be judged, and when the first stop valve is not opened, the air conditioner is closed, so that the problem that the air conditioner is damaged or a safety accident is caused by mistakenly opening the air conditioner under the condition that the first stop valve is not opened is solved.
In addition, the control method of the air conditioner provided by the invention also controls the air conditioner through a comparison result based on the variation of the suction pressure of the compressor in unit time after the air conditioner is started and a preset suction pressure variation threshold value, and a comparison result of the opening value of the electronic expansion valve and the set opening value. Thereby can judge whether the second stop valve that sets up on the refrigerant pipeline between indoor heat exchanger and the compressor is opened to when the second stop valve is not opened, close the air conditioner, in order to avoid opening the air conditioner by mistake under the condition that the second stop valve is not opened, and lead to the air conditioner to damage or the problem that takes place the incident.
Drawings
A control method of an air conditioner of the present invention will be described below with reference to the accompanying drawings in conjunction with a basic structure of the air conditioner. In the drawings:
fig. 1 is a schematic structural diagram of a conventional air conditioner;
fig. 2 is a flowchart illustrating a first embodiment of a control method of an air conditioner according to the present embodiment;
fig. 3 is a flowchart illustrating a second embodiment of the air conditioner control method according to the present embodiment.
List of reference numerals
1-a compressor; 11-an exhaust pressure sensor; 12-an inspiratory pressure sensor; 2-outdoor heat exchanger; 21-a condensation temperature sensor; 3-a first stop valve; 4-a filter; 5-an electronic expansion valve; 6-indoor heat exchanger; 61-an evaporation temperature sensor; 7-second stop valve.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. For example, although the control method of the air conditioner in the embodiment is described with respect to a specific structure of the air conditioner, this is not intended to limit the scope of the present invention, and the structure of the air conditioner is not constant, and those skilled in the art may apply the present invention to the air conditioner with the structure adjusted or changed without departing from the principle of the present invention. For example, an air conditioner provided with a gas-liquid separator and a liquid reservoir.
Before explaining the control method of the air conditioner provided by the present invention, a basic structure of the conventional air conditioner will be briefly explained. As shown in fig. 1, taking a refrigeration air conditioner as an example, a conventional air conditioner generally includes a compressor 1, an outdoor heat exchanger 2, and an indoor heat exchanger 6, when the air conditioner is in operation, a refrigerant flows from an exhaust port of the compressor 1 to the outdoor heat exchanger 2, flows out of the outdoor heat exchanger 2, passes through the indoor heat exchanger 6, and finally flows back to the compressor 1 from an intake port of the compressor 1. Wherein, be provided with first stop valve 3 (or being called liquid pipe stop valve) and electronic expansion valve 5 on the pipeline between indoor heat exchanger 6 and outdoor heat exchanger 2, be provided with second stop valve 7 (or being called the trachea stop valve) on the pipeline between indoor heat exchanger 6 and compressor 1. The first and second stop valves 3 and 7 control the flow and stop of the refrigerant between the indoor heat exchanger 6 and the outdoor heat exchanger 2. In normal operation of the air conditioner, it is necessary that both the first cut valve 3 and the second cut valve 7 are in an open state.
Further, a suction pressure sensor 12 is disposed at a suction port of the compressor 1, and a discharge pressure sensor 11 is disposed at a discharge port of the compressor 1, and is used for monitoring the suction pressure and the discharge pressure of the compressor 1, respectively, so as to provide data for controlling the air conditioner.
The air conditioner in this embodiment is a refrigeration air conditioner in which the outdoor heat exchanger 2 is used as a condenser and the indoor heat exchanger 6 is used as an evaporator. A condensation temperature sensor 21 measuring a condensation temperature and an evaporation temperature sensor 61 measuring an evaporation temperature may be provided on the outdoor heat exchanger 2 and the indoor heat exchanger 6 to monitor a condensation effect of the outdoor heat exchanger 2 and an evaporation effect of the indoor heat exchanger 6.
Since the refrigerant may contain some impurities due to dust, scale, and the like generated in the refrigerant pipe when the compressor 1 is operated, and the normal operation of the air conditioner is affected, the filter 4 may be generally disposed between the first cut valve 3 and the electronic expansion valve 5.
The above description is directed to the general structure of the conventional air conditioner, but it will be understood by those skilled in the art that the control method of the air conditioner of the present application may be applied to other structures or types of air conditioners, for example, an air conditioner having both a cooling function and a heating function, without departing from the principle of the present invention. Therefore, the basic structure of the air conditioner described above should not be construed as limiting the scope of protection of the control method of the air conditioner of the present invention.
The present embodiment provides a control method of an air conditioner, wherein, as shown in fig. 1, the air conditioner includes a compressor 1, an indoor heat exchanger 6, and an outdoor heat exchanger 2, and a first stop valve 3 and an electronic expansion valve 5 are disposed on a refrigerant pipeline between the outdoor heat exchanger 2 and the indoor heat exchanger 6, as shown in fig. 2, the control method includes:
s11, acquiring the exhaust pressure of the compressor 1 and the opening value of the electronic expansion valve 5;
s12, calculating the variation of the exhaust pressure in unit time after the air conditioner is started;
s13, comparing the variation of the exhaust pressure with a preset exhaust pressure variation threshold;
s14, comparing the opening degree value of the electronic expansion valve 5 with a set opening degree value;
s15, the air conditioner is controlled based on the result of comparing the amount of change in the exhaust pressure and the result of comparing the opening degree value of the electronic expansion valve 5.
For example, as in the air conditioner of fig. 1, the discharge pressure sensor 11 may be used to monitor and obtain the discharge pressure of the compressor 1, and the opening degree of the electronic expansion valve 5 may also be obtained by a special monitoring instrument.
The variation of the exhaust pressure in a unit time may be a period of time such as 3s or 5s, which is taken as the variation in the unit time, or a period of time after the air conditioner is turned on, and the period of time is set with reference to a safety time taken for the pressure on the refrigerant pipeline in the air conditioner to rise to a safety value, which should not be exceeded, and for example, one tenth of the period of time may be taken as the unit time.
The discharge pressure variation threshold may refer to a normal variation value when the compressor 1 normally operates, which may be different for different air conditioners. Further, the opening degree value of the electronic expansion valve 5 is compared with the set opening degree value, whereby a factor that the opening degree of the electronic expansion valve 5 is too small and causes an abnormal influence on the amount of change in the exhaust pressure per unit time can be excluded.
It should be noted that although the detailed steps of the method of the present invention have been described in detail, those skilled in the art can combine, separate and change the order of the above steps without departing from the basic principle of the present invention, and the modified technical solution does not change the basic concept of the present invention and thus falls into the protection scope of the present invention. For example, on the premise that step S12 is performed before step S13 is performed, step S14 may also be performed between steps S11 and S12, or step S14 may also be performed between steps S12 and S13. For another example, in step S11, the discharge pressure of the compressor 1 and the opening degree of the electronic expansion valve 5 may be obtained simultaneously, or sequentially, and there is no special requirement in the order.
The control method of the air conditioner provided by the embodiment controls the air conditioner by comparing the variation of the exhaust pressure of the compressor 1 in a unit time after the air conditioner is turned on with the preset exhaust pressure variation threshold and the comparison of the opening value of the electronic expansion valve 5 with the set opening value. Therefore, whether the first stop valve 3 arranged on the refrigerant pipeline between the outdoor heat exchanger 2 and the indoor heat exchanger 6 is opened or not can be judged, and when the first stop valve 3 is not opened, the air conditioner is closed, so that the problem that the air conditioner is damaged or a safety accident is caused due to the fact that the air conditioner is turned on by mistake under the condition that the first stop valve 3 is not opened is solved.
As a preferred embodiment of the control method provided in the present embodiment, the step of "controlling the air conditioner based on the result of comparing the amount of change in the exhaust pressure and the result of comparing the opening degree value of the electronic expansion valve 5" specifically includes: if the variation of the exhaust pressure is greater than the exhaust pressure variation threshold and the opening value of the electronic expansion valve 5 is smaller than the set opening value, the opening value of the electronic expansion valve 5 is adjusted to be greater than or equal to the set opening value, and the air conditioner is controlled continuously based on the comparison result of the variation of the exhaust pressure.
For example, since the variation of the discharge pressure is also affected when the opening degree of the electronic expansion valve 5 is small, when it is monitored that the opening degree of the electronic expansion valve 5 is smaller than the set value, it is necessary to adjust the opening degree value of the electronic expansion valve 5 to be greater than or equal to the set opening degree value, continue to monitor and compare the discharge pressure of the compressor 1, and then control the air conditioner based on the comparison result of the variation of the discharge pressure to eliminate the abnormal influence of the opening degree of the electronic expansion valve 5 on the variation of the discharge pressure per unit time.
Then, after the opening degree value of the electronic expansion valve 5 is adjusted to be greater than or equal to the set opening degree value, the step of "controlling the air conditioner based on the comparison result of the variation amount of the exhaust pressure" specifically includes: acquiring the duration that the variation of the exhaust pressure is greater than the exhaust pressure variation threshold; and if the duration time is greater than a preset time threshold value, closing the air conditioner.
As a preferred embodiment of the control method provided in the present embodiment, the step of "controlling the air conditioner based on the result of comparing the amount of change in the exhaust pressure and the result of comparing the opening degree value of the electronic expansion valve 5" specifically includes: if the variation of the exhaust pressure is greater than the exhaust pressure variation threshold and the opening value of the electronic expansion valve 5 is greater than or equal to the set opening value, acquiring the duration that the variation of the exhaust pressure is greater than the exhaust pressure variation threshold; and if the duration time is greater than a preset time threshold value, closing the air conditioner.
Wherein the duration in which the amount of change in the exhaust pressure is larger than the exhaust pressure change threshold is obtained, it is possible to more reliably determine whether the first shutoff valve 3 is open. If the duration time is longer than the preset time threshold, it indicates that the first stop valve 3 is not opened, and at this time, the air conditioner is closed, so as to avoid damage or danger to the air conditioner.
As a preferred implementation of the foregoing control method provided in this embodiment, the control method further includes: at the same time when the air conditioner is turned off, a notice that the first stop valve 3 is not opened is issued. For example, the air conditioner sounds an alarm and a display on the air conditioner also displays an error message to alert the air conditioner installer.
The above-described embodiment shows a specific embodiment of a control method of an air conditioner required to prevent damage to the air conditioner or a safety accident from occurring due to the first cutoff valve 3 (liquid pipe cutoff valve) not being opened. A specific embodiment of a control method of the air conditioner required to prevent the air conditioner from being damaged or causing a safety accident due to the second cut-off valve 7 (air pipe cut-off valve) not being opened will be described below. The two are the same in principle, and are both based on whether the air pressure change on the refrigerant pipeline is normal or not to control the air conditioner.
In addition, in another control method of an air conditioner provided in this embodiment, the air conditioner includes a compressor 1, an indoor heat exchanger 6, and an outdoor heat exchanger 2, an electronic expansion valve 5 is disposed on a refrigerant pipeline between the outdoor heat exchanger 2 and the indoor heat exchanger 6, and a second stop valve 7 is disposed on a refrigerant pipeline between the indoor heat exchanger 6 and the compressor 1, as shown in fig. 3, the control method includes:
s21, acquiring the suction pressure of the compressor 1 and the opening value of the electronic expansion valve 5;
s22, calculating the variation of the suction pressure in unit time after the air conditioner is started;
s23, comparing the variation of the suction pressure with a preset suction pressure variation threshold;
s24, comparing the opening degree value of the electronic expansion valve 5 with a set opening degree value;
s25, the air conditioner is controlled based on the result of comparing the amount of change in the intake pressure and the result of comparing the opening degree value of the electronic expansion valve 5.
For example, as in the air conditioner of fig. 1, the suction pressure sensor 12 may be used to monitor and obtain the discharge pressure of the compressor 1, and the opening degree of the electronic expansion valve 5 may also be obtained by a special monitoring instrument.
The variation of the suction pressure in a unit time may be a period of time such as 3s or 5s, which is used as the variation in the unit time, or a period of time after the air conditioner is turned on, and the period of time is set with reference to a safety time taken for the pressure on the refrigerant pipeline in the air conditioner to rise to a safety value, which should not be exceeded, and for example, one tenth of the period of time may be used as the unit time.
The suction pressure variation threshold may refer to a normal variation value when the compressor 1 normally operates, which may be different for different air conditioners. In addition, the opening degree value of the electronic expansion valve 5 is compared with the set opening degree value, whereby a factor that the opening degree of the electronic expansion valve 5 is too small and that the amount of change in the suction pressure per unit time is abnormally affected can be excluded.
It should be noted that although the detailed steps of the method of the present invention have been described in detail, those skilled in the art can combine, separate and change the order of the above steps without departing from the basic principle of the present invention, and the modified technical solution does not change the basic concept of the present invention and thus falls into the protection scope of the present invention. For example, on the premise that step S22 is performed before step S23 is performed, step S24 may also be performed between steps S21 and S22, or step S24 may also be performed between steps S22 and S23. For another example, in step S21, the suction pressure of the compressor 1 and the opening degree of the electronic expansion valve 5 may be obtained simultaneously or sequentially, and there is no special requirement in the order.
The control method of the air conditioner provided in this embodiment controls the air conditioner based on the comparison result between the variation of the suction pressure of the compressor 1 in a unit time after the air conditioner is turned on and the preset suction pressure variation threshold, and the comparison result between the opening value of the electronic expansion valve 5 and the set opening value. Thereby can judge whether the second stop valve 7 that sets up on the refrigerant pipeline between indoor heat exchanger 6 and the compressor 1 opens to when second stop valve 7 does not open, close the air conditioner, in order to avoid opening the air conditioner by mistake under the condition that second stop valve 7 does not open, and lead to the air conditioner to damage or the problem of emergence incident.
As a preferred embodiment of the control method provided in the present embodiment, the step of "controlling the air conditioner based on the result of comparing the amount of change in the suction pressure and the result of comparing the opening degree value of the electronic expansion valve 5" specifically includes: if the variation of the suction pressure is larger than the preset suction pressure variation threshold value and the opening degree value of the electronic expansion valve 5 is smaller than the set opening degree value, the opening degree value of the electronic expansion valve 5 is adjusted to be larger than or equal to the set opening degree value, and the air conditioner is controlled continuously based on the comparison result of the variation of the suction pressure.
For example, since the variation of the suction pressure is also affected when the opening degree of the electronic expansion valve 5 is small, when it is monitored that the opening degree of the electronic expansion valve 5 is smaller than the set value, the opening degree of the electronic expansion valve 5 needs to be adjusted to be greater than or equal to the set opening degree, the suction pressure of the compressor 1 needs to be monitored and compared continuously, and then the air conditioner needs to be controlled based on the comparison result of the variation of the suction pressure to eliminate the abnormal influence of the opening degree of the electronic expansion valve 5 on the variation of the suction pressure per unit time.
Then, after the opening degree value of the electronic expansion valve 5 is adjusted to be greater than or equal to the set opening degree value, the step of "controlling the air conditioner based on the comparison result of the variation amount of the suction pressure" specifically includes: acquiring the duration that the variation of the suction pressure is greater than the suction pressure variation threshold; and if the duration time is greater than a preset time threshold value, closing the air conditioner.
As a preferred embodiment of the control method provided in the present embodiment, the step of "controlling the air conditioner based on the result of comparing the amount of change in the suction pressure and the result of comparing the opening degree value of the electronic expansion valve 5" specifically includes: if the variation of the suction pressure is larger than the suction pressure variation threshold value and the opening value of the electronic expansion valve 5 is larger than or equal to the set opening value, acquiring the duration that the variation of the suction pressure is larger than the suction pressure variation threshold value; and if the duration time is greater than a preset time threshold value, closing the air conditioner.
Wherein, acquiring the duration in which the amount of change in the suction pressure is greater than the suction pressure change threshold value can more reliably determine whether the second cut-off valve 7 is open. If the duration time of the second stop valve is longer than the preset time threshold, the second stop valve 7 is not opened, and the air conditioner is closed at the moment, so that damage or danger to the air conditioner is avoided.
As a preferred implementation of the foregoing control method provided in this embodiment, the control method further includes: at the same time as the air conditioner is turned off, a notice is given that the second cut-off valve 7 is not opened. For example, the air conditioner sounds an alarm and a display on the air conditioner also displays an error message to alert the air conditioner installer.
Of course, the above alternative embodiments, and the alternative embodiments and the preferred embodiments can also be used in a cross-matching manner, so that a new embodiment is combined to be suitable for a more specific application scenario. For example, the steps S11 and S21 may be combined, that is, the suction pressure and the discharge pressure of the compressor 1 and the opening degree value of the electronic expansion valve 5 may be acquired in the first step, and the subsequent steps of the two embodiments may be combined to simultaneously determine whether the first stop valve 3 and the second stop valve 7 are in the open state, and control the air conditioner.
It should be understood by those skilled in the art that the air conditioner pair control method provided in the present embodiment may be stored as a program in a computer-readable storage medium. The storage medium includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to perform some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims of the present invention, any of the claimed embodiments may be used in any combination.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. A control method of an air conditioner comprises a compressor, an indoor heat exchanger and an outdoor heat exchanger, wherein a first stop valve and an electronic expansion valve are arranged on a refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger, and the control method comprises the following steps:
acquiring the exhaust pressure of a compressor and the opening value of the electronic expansion valve;
calculating the variation of the exhaust pressure in unit time after the air conditioner is started;
comparing the variable quantity of the exhaust pressure with a preset exhaust pressure variable threshold;
comparing the opening degree value of the electronic expansion valve with a set opening degree value;
and controlling the air conditioner based on the comparison result of the variation of the exhaust pressure and the comparison result of the opening value of the electronic expansion valve.
2. The control method according to claim 1, wherein the step of controlling the air conditioner based on the comparison result of the variation in the discharge pressure and the comparison result of the opening degree value of the electronic expansion valve specifically includes:
if the variation of the exhaust pressure is larger than the exhaust pressure variation threshold value and the opening value of the electronic expansion valve is smaller than the set opening value, adjusting the opening value of the electronic expansion valve to be larger than or equal to the set opening value, and continuing to control the air conditioner based on the comparison result of the variation of the exhaust pressure.
3. The control method according to claim 1, wherein the step of controlling the air conditioner based on the comparison result of the variation in the discharge pressure and the comparison result of the opening degree value of the electronic expansion valve specifically includes:
if the variation of the exhaust pressure is larger than the exhaust pressure variation threshold and the opening value of the electronic expansion valve is larger than or equal to the set opening value, acquiring the duration that the variation of the exhaust pressure is larger than the exhaust pressure variation threshold;
and if the duration time is greater than a preset time threshold value, closing the air conditioner.
4. The control method according to claim 2, wherein the step of controlling the air conditioner based on the comparison result of the variation amount of the exhaust pressure specifically includes:
obtaining the duration of the variable quantity of the exhaust pressure which is greater than the exhaust pressure variable threshold;
and if the duration time is greater than a preset time threshold value, closing the air conditioner.
5. The control method according to claim 3 or 4, characterized by further comprising:
and sending a prompt that the first stop valve is not opened while the air conditioner is closed.
6. A control method of an air conditioner comprises a compressor, an indoor heat exchanger and an outdoor heat exchanger, wherein an electronic expansion valve is arranged on a refrigerant pipeline between the outdoor heat exchanger and the indoor heat exchanger, and a second stop valve is arranged on the refrigerant pipeline between the indoor heat exchanger and the compressor, and is characterized in that the control method comprises the following steps:
acquiring the suction pressure of a compressor and the opening value of the electronic expansion valve;
calculating the variation of the suction pressure in unit time after the air conditioner is started;
comparing the variation of the suction pressure with a preset suction pressure variation threshold;
comparing the opening degree value of the electronic expansion valve with a set opening degree value;
and controlling the air conditioner based on the comparison result of the variation of the suction pressure and the comparison result of the opening value of the electronic expansion valve.
7. The control method according to claim 6, wherein the step of controlling the air conditioner based on the result of comparing the amount of change in the suction pressure and the result of comparing the opening degree value of the electronic expansion valve specifically includes:
and if the variation of the suction pressure is larger than a preset suction pressure variation threshold value and the opening degree value of the electronic expansion valve is smaller than a set opening degree value, adjusting the opening degree value of the electronic expansion valve to be larger than or equal to the set opening degree value, and continuously controlling the air conditioner based on the comparison result of the variation of the suction pressure.
8. The control method according to claim 6, wherein the step of controlling the air conditioner based on the result of comparing the amount of change in the suction pressure and the result of comparing the opening degree value of the electronic expansion valve specifically includes:
if the variation of the suction pressure is larger than the suction pressure variation threshold value and the opening value of the electronic expansion valve is larger than or equal to the set opening value, acquiring the duration of the suction pressure variation larger than the suction pressure variation threshold value;
and if the duration time is greater than a preset time threshold value, closing the air conditioner.
9. The control method according to claim 7, wherein the step of controlling the air conditioner based on the comparison result of the variation amount of the suction pressure specifically includes:
acquiring the duration that the variation of the suction pressure is greater than the suction pressure variation threshold;
and if the duration time is greater than a preset time threshold value, closing the air conditioner.
10. The control method according to claim 8 or 9, characterized by further comprising:
and sending a prompt that the second stop valve is not opened while the air conditioner is closed.
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| CN202010120478.3A CN111425996B (en) | 2020-02-26 | 2020-02-26 | Control method of air conditioner |
| PCT/CN2020/126443 WO2021169391A1 (en) | 2020-02-26 | 2020-11-04 | Control method for air conditioner |
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| CN202010120478.3A CN111425996B (en) | 2020-02-26 | 2020-02-26 | Control method of air conditioner |
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| WO2021169391A1 (en) * | 2020-02-26 | 2021-09-02 | 青岛海尔空调电子有限公司 | Control method for air conditioner |
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| WO2021169391A1 (en) | 2021-09-02 |
| CN111425996B (en) | 2022-11-22 |
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