CN111720981A - Control method of air conditioner compressor and air conditioner - Google Patents
Control method of air conditioner compressor and air conditioner Download PDFInfo
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- CN111720981A CN111720981A CN202010485837.5A CN202010485837A CN111720981A CN 111720981 A CN111720981 A CN 111720981A CN 202010485837 A CN202010485837 A CN 202010485837A CN 111720981 A CN111720981 A CN 111720981A
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/20—Electric components for separate outdoor units
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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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Abstract
The invention provides a control method of an air conditioner compressor and an air conditioner, wherein the air conditioner comprises a PFC circuit and an electrolytic capacitor connected with the output end of the PFC circuit in parallel; the control method comprises the following steps: detecting the internal temperature of the electrolytic capacitor to obtain a first test temperature; judging whether the first test temperature is greater than a first preset temperature threshold value or not; if the first test temperature is greater than a first preset temperature threshold value, calculating the temperature rise change rate of the first test temperature within a first preset time interval; and adjusting the operating frequency of the compressor according to the temperature rise change rate of the first test temperature. The control method of the invention pre-adjusts the frequency of the compressor at the stage that the internal temperature of the electrolytic capacitor is lower, avoids the influence caused by the adjusted hysteretic electrolytic capacitor, and achieves the purpose of reducing the internal temperature of the electrolytic capacitor by adjusting the frequency of the compressor, thereby delaying the evaporation speed of the electrolyte and prolonging the service life of the electrolytic capacitor.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to a control method of an air conditioner compressor and an air conditioner.
Background
The aluminum electrolytic capacitor is a key device of an outer unit computer board of the variable frequency air conditioner, the service life of the aluminum electrolytic capacitor directly influences the service life of the air conditioner, the service life of the electrolytic capacitor is directly related to the temperature inside the electrolytic capacitor during working, the higher the temperature is, the faster the electrolyte inside the electrolytic capacitor volatilizes, and the shorter the service life is, so that the service life of the whole air conditioner can be directly influenced. For example, an air conditioner manufacturer promises the service life of n years to users, but the service life of the aluminum electrolytic capacitor is often not more than n years, so that the service life of the whole machine is influenced. Therefore, the research on how to prolong the service life of the electrolytic capacitor is particularly important for prolonging the service life of the whole air conditioner.
In order to prevent the electrolytic capacitor from being damaged due to overhigh temperature, some control methods exist in the prior art, and the current is directly used as a reference object to regulate and control the frequency of a compressor, so that the purpose of regulating and controlling the temperature of the electrolytic capacitor is achieved. However, these methods have certain disadvantages, for example, the current is only one of the conditions causing the electrolytic capacitor to generate heat, and the temperature of the electrolytic capacitor is regulated and controlled only by using the current as a reference object, which may cause phenomena of regulation lag, low regulation precision, and even ineffective regulation, and thus the practicability is low.
Disclosure of Invention
The present invention has been made in view of the above problems, and has an object to provide a control method of an air conditioner compressor and an air conditioner that overcome or at least partially solve the above problems.
A further object of the present invention is to avoid the effects of adjusting the hysteretic electrolytic capacitor and to precisely adjust the frequency of the compressor to reduce the internal temperature of the electrolytic capacitor and extend the life of the electrolytic capacitor.
It is another further object of the present invention to enhance the user experience.
Particularly, the application provides a control method of an air conditioner compressor, wherein the air conditioner comprises a PFC circuit and an electrolytic capacitor connected with the output end of the PFC circuit in parallel; and, the control method includes:
detecting the internal temperature of the electrolytic capacitor to obtain a first test temperature;
judging whether the first test temperature is greater than a first preset temperature threshold value or not;
if the first test temperature is greater than a first preset temperature threshold value, calculating the temperature rise change rate of the first test temperature within a first preset time interval; and
and adjusting the running frequency of the compressor according to the temperature rise change rate of the first test temperature.
Further, the step of adjusting the operating frequency of the compressor according to the rate of change of the temperature rise of the first test temperature further comprises:
judging whether the temperature rise change rate of the first test temperature is greater than a first preset change rate threshold value or not;
if the temperature rise change rate of the first test temperature is larger than the first preset change rate threshold value, stopping the compressor;
if the temperature rise change rate of the first test temperature is smaller than or equal to the first preset change rate threshold, judging whether the temperature rise change rate of the first test temperature is larger than a second preset change rate threshold;
if the temperature rise change rate of the test temperature is larger than the second preset change rate threshold value, reducing the running frequency of the compressor; and
if the temperature rise change rate of the test temperature is smaller than or equal to a second preset change rate threshold value, the compressor keeps the current running frequency; and is
The first preset rate of change threshold is configured to be greater than the second preset rate of change threshold.
Further, the step of reducing the operating frequency of the compressor further comprises:
the operating frequency of the compressor is reduced by a first preset multiple of the current operating frequency.
Further, the step of reducing the operating frequency of the compressor further comprises:
and determining the reduction multiple of the running frequency of the compressor according to the increase multiple of the temperature rise change rate of the first test temperature relative to the second preset change rate threshold value.
Further, the step after adjusting the operating frequency of the compressor further comprises:
obtaining the internal temperature of the electrolytic capacitor after a second preset time interval to obtain a second test temperature;
judging whether the second test temperature is greater than a second preset temperature threshold value or not;
if the second test temperature is less than or equal to a second preset temperature threshold value, the compressor recovers to the running frequency before adjustment;
if the second test temperature is greater than a second preset temperature threshold, judging whether the second test temperature is greater than a third preset temperature threshold;
if the second test temperature is less than or equal to a third preset temperature threshold, the compressor keeps the adjusted running frequency;
if the second test temperature is greater than a third preset temperature threshold, judging whether the second test temperature is greater than a fourth preset temperature threshold;
if the second test temperature is less than or equal to a fourth preset temperature threshold value, reducing the running frequency of the compressor again;
if the second test temperature is greater than a fourth preset temperature threshold value, stopping the compressor; and is
The fourth preset temperature threshold is configured to be greater than the third preset temperature threshold; and is
The third preset temperature threshold is configured to be greater than the second preset temperature threshold; and is
The second preset temperature threshold is configured to be greater than the first preset temperature threshold.
Further, the step of reducing the operating frequency of the compressor again further comprises:
the operating frequency of the compressor is reduced by a second preset multiple of the adjusted current operating frequency.
Further, the first preset time interval and the second preset time interval are any selected numerical value within the range of 10-15 s.
Further, the second preset time interval is configured to be greater than the first preset time interval.
Further, the first preset change rate threshold value and the second preset change rate threshold value are any selected numerical value within the range of 1-10 ℃.
In particular, the present application also provides an air conditioner comprising:
a controller comprising a memory and a processor, the memory having stored therein a computer program for implementing the above control method when executed by the processor.
The control method selects the change rate of the temperature rise inside the electrolytic capacitor as the regulating quantity based on the nature of the heating of the electrolytic capacitor, and pre-regulates the frequency of the compressor at the stage that the temperature inside the electrolytic capacitor is lower, so that the influence of the hysteresis of regulation on the electrolytic capacitor is avoided, the aim of reducing the temperature inside the electrolytic capacitor is fulfilled by regulating the frequency of the compressor, the evaporation speed of electrolyte is delayed, and the service life of the electrolytic capacitor is prolonged.
Furthermore, the control method of the invention compares the second test temperature with the second preset temperature threshold value and compares the third preset temperature threshold value with the fourth preset temperature threshold value, and adjusts the frequency of the compressor again after the preset adjustment, so that the frequency of the compressor is adjusted when the use condition of the air conditioner changes suddenly, and the adjustment reliability is improved. And when the second test temperature is less than or equal to the second preset temperature threshold value, the control method enables the compressor to recover to the running frequency before adjustment, so that the compressor can obtain higher frequency on the premise of ensuring the safety of the electrolytic capacitor, the air conditioner can further reach the target temperature set by a user more quickly, and the use experience of the user is optimized.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter, by way of illustration and not limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
fig. 1 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a power supply circuit according to one embodiment of the invention;
fig. 3 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention;
FIG. 4 is a schematic flow chart diagram of a control method according to one embodiment of the present invention;
FIG. 5 is a schematic flow chart diagram of a control method according to another embodiment of the present invention;
fig. 6 is a schematic flow chart of a control method after adjusting an operating frequency of a compressor according to one embodiment of the present invention.
Detailed Description
Referring to fig. 1, fig. 1 is a schematic structural diagram of an air conditioner according to an embodiment of the present invention. The present application provides an air conditioner 1, generally including a compressor 10 for compressing a refrigerant, a four-way valve 20 for switching a flow direction of the refrigerant in a refrigeration system of the air conditioner 1, an indoor heat exchanger 30 for exchanging heat with indoor air, a double pipe heat exchanger 40 having inner and outer pipes (an inner pipe 41 and an outer pipe 42), an expansion valve 50 for throttling the refrigerant, and an outdoor heat exchanger 60 for exchanging heat with outdoor air. Further, the air conditioner 1 may further include an indoor fan 31 for circulating indoor air inside and outside the indoor unit of the air conditioner, a heating device 32 for heating the coil of the indoor heat exchanger 30, and an outdoor fan 61 for circulating outdoor air inside and outside the outdoor unit of the air conditioner. An accumulator 11 may be further disposed at the refrigerant inlet of the compressor 10, so that the returned refrigerant flows into the accumulator 11 and then enters the compressor 10.
Referring to fig. 2, the Power circuit of the air conditioner 1 further includes a rectifying circuit, a PFC (Power factor correction) circuit, and an electrolytic capacitor C connected in parallel to an output end of the PFC circuit. The electrolytic capacitor C is used as an important electrical element in a circuit system, and the service life of the electrolytic capacitor C is a main index for measuring the quality of the air conditioner. It has been found that the life of the electrolytic capacitor C is related to its internal temperature, and that the higher the temperature, the faster the electrolyte inside it evaporates, and the shorter the life.
Referring to fig. 3 and 4, fig. 3 is a schematic structural schematic diagram of an air conditioner according to an embodiment of the present invention, and fig. 4 is a schematic flowchart of a control method according to an embodiment of the present invention. In some embodiments of the present application, the air conditioner 1 further comprises a controller 70, the controller 70 comprising a memory 72 and a processor 74, a computer program 722 stored in the memory 72, the computer program 722 being executable by the processor 74 for implementing a method of controlling the compressor of the air conditioner. The method solves the problem that the electrolytic capacitor C has overhigh temperature in the running process of the air conditioner 1 by accurately regulating and controlling the frequency of the compressor 10, and achieves the purpose of reducing the surface temperature of the electrolytic capacitor. And having a method comprising the steps of:
step S110, detecting the internal temperature of the electrolytic capacitor C to obtain a first test temperature t 1;
step S120, judging whether the first test temperature T1 is greater than a first preset temperature threshold T1;
step S130, if the first test temperature T1 is greater than a first preset temperature threshold T1, calculating the temperature rise change rate a of the first test temperature within a first preset time interval Delta S1; and
and step S140, adjusting the running frequency of the compressor 10 according to the temperature rise change rate a of the first test temperature.
After the air conditioner 1 is started, the power circuit starts to work, the ripple current of the electrolytic capacitor C and the equivalent resistance thereof cause power loss, certain heat loss is generated, and the internal temperature of the electrolytic capacitor C is gradually increased, so that the evaporation speed of the electrolyte of the electrolytic capacitor C is accelerated, the service life of the electrolytic capacitor C is shortened, and the service life of the whole air conditioner 1 is influenced.
The electrolytic capacitor C of the air conditioner 1 of the present embodiment has a temperature measuring device built therein, the accuracy of the temperature measuring device may be ± 0.5 ℃, and in step S110, the temperature measuring device is capable of acquiring an internal temperature signal of the electrolytic capacitor C, and the temperature signal is directly processed by the a/D converter to obtain the first test temperature t 1. Of course, there are many ways to detect the internal temperature of the electrolytic capacitor C, which are well known to those skilled in the art, and are not described herein in detail in order to avoid obscuring the invention of the present application.
In step S120, the magnitude relationship between the first test temperature T1 and the first preset temperature threshold T1 is compared, wherein the first preset temperature threshold T1 is a preset value, and a specific value may be configured according to actual conditions when the air conditioner 1 is shipped from a factory and stored in an EEPROM (electrically erasable programmable read only memory). In some specific embodiments of the present application, the first preset temperature threshold T1 may be configured to be slightly greater than the rated operating temperature of the electrolytic capacitor C, for example, the first preset temperature threshold T1 is configured to be 1.1 to 1.3 times the rated operating temperature of the electrolytic capacitor C, so as to better protect the electrolytic capacitor C.
In step S130, if the first test temperature T1 is greater than the first preset temperature threshold T1, and the temperature of the electrolytic capacitor C is considered to have a rising trend, the temperature rise change rate a of the first test temperature within the first preset time interval Δ S1 is calculated.
Specifically, the air conditioner 1 in the embodiment is further provided with a timing device, and the step S130 may start timing after the first test temperature T1 is judged to be greater than the first preset temperature threshold T1 by using the timing device, detect the first test temperature T1' after the first preset time interval Δ S1 is passed by using the temperature measuring device, and then calculate the temperature rise change rate a of the first test temperature within the first preset time interval Δ S1 according to the following formula.
a＝(t1＇-t1)/△S1
In the present embodiment, the control method adjusts the operating frequency of the compressor 10 according to the temperature rise change rate a of the first test temperature. After the air conditioner 1 is started, the internal temperature of the electrolytic capacitor C is related to external factors, such as the operating frequency of the compressor 10, the ambient temperature, and the like. When the first test temperature T1 is greater than the first preset temperature threshold T1, the temperature of the electrolytic capacitor C is not actually too high, and if the temperature rise change rate a is too large, it indicates that the internal temperature of the electrolytic capacitor C increases too fast, the operating frequency of the compressor 10 needs to be adjusted in advance, so as to avoid the influence on the electrolytic capacitor C caused by adjustment lag, so that the internal temperature of the electrolytic capacitor C under high load is reduced smoothly and effectively, the service life of the electrolytic capacitor C is prolonged, and the service life of the whole air conditioner 1 is prolonged.
Referring to fig. 5, fig. 5 is a schematic flow chart of a control method according to another embodiment of the invention. In other embodiments of the present application, the step of adjusting the operating frequency of the compressor 10 according to the rate of change of temperature rise a of the first test temperature further comprises:
step S210, judging whether the temperature rise change rate a of the first test temperature is greater than a first preset change rate threshold value A1;
step S212, if the temperature rise change rate a of the first test temperature is greater than the first preset change rate threshold value a1, stopping the compressor 10;
step S220, if the temperature rise change rate a of the first test temperature is less than or equal to a first preset change rate threshold A1, judging whether the temperature rise change rate a of the first test temperature is greater than a second preset change rate threshold A2;
step S222, if the temperature rise change rate a of the test temperature is greater than a second preset change rate threshold value a2, reducing the operating frequency of the compressor 10;
in step S122, if the temperature rise change rate a of the test temperature is less than or equal to the second preset change rate threshold value a2, the compressor 10 maintains the current operating frequency.
In the present embodiment, the first preset rate of change threshold a1 and the second preset rate of change threshold a2 are both preset values, and the first preset rate of change threshold a1 is configured to be greater than the second preset rate of change threshold a 2.
When the temperature rise change rate a of the first test temperature within the first preset time interval is greater than the first preset change rate threshold a1, it is determined that the temperature rise of the electrolytic capacitor C is too fast at this time, which may directly affect the safety of the air conditioner 1, and step S212 is directly executed to stop the compressor 10, that is, the air conditioner 1 is stopped. When the temperature rise change rate a is between the first preset change rate threshold a1 and the second preset change rate threshold a2, it is determined that the temperature rise of the electrolytic capacitor C is fast, and the temperature of the electrolytic capacitor C can be further reduced by appropriately reducing the operating frequency of the compressor 10 to reduce the magnitude of the ripple current in the power supply circuit. When the temperature rise change rate a is smaller than the second preset change rate threshold value a2, the temperature rise of the electrolytic capacitor C is considered to be slow, and the compressor 10 can operate according to the current frequency.
In some embodiments of the present application, the step of reducing the operating frequency of the compressor 10 further comprises reducing the operating frequency of the compressor 10 by a first preset multiple of the current operating frequency.
In some other embodiments of the present application, the step of reducing the operating frequency of the compressor 10 further comprises:
the reduction factor of the operating frequency of the compressor 10 is determined as a function of the multiple of the rate of change a of the temperature rise of the first test temperature with respect to the second preset rate of change threshold a 2.
Generally, the rate of change of temperature rise a is generally positively correlated with the operating frequency of compressor 10. When the proportion of the temperature rise change rate a of the electrolytic capacitor C exceeding the second preset change rate threshold value a2 is larger, the current operation frequency of the compressor 10 is considered to be too large, and the operation frequency of the compressor 10 can be configured to be reduced to a larger extent.
For example, when the rate of change a in temperature rise at the first test temperature is 1.1 times relative to the second preset rate of change threshold a2, the operating frequency of compressor 10 decreases by 10%; when the multiple of the temperature rise change rate a of the first test temperature relative to the second preset change rate threshold value a2 is 1.3 times, the operating frequency of the compressor 10 is reduced by 30%; when the multiple of the temperature rise change rate a of the first test temperature relative to the second preset change rate threshold value a2 is 1.2 times, the operating frequency of the compressor 10 is reduced by 50%; when the multiple of the temperature rise change rate a of the first test temperature relative to the second preset change rate threshold value a2 is 1.8 times, the operating frequency of the compressor 10 is reduced by 80%; when the temperature rise change rate a of the first test temperature is 2 times relative to the second preset change rate threshold value a2, the operating frequency of the compressor 10 is reduced by 100%, that is, the compressor 10 is stopped.
Referring to fig. 6, in some other embodiments of the present application, the step after adjusting the operating frequency of the compressor 10 further includes:
step S310, obtaining the internal temperature of the electrolytic capacitor C delta S2 after a second preset time interval, and obtaining a second test temperature t 2;
step S320, judging whether the second test temperature T2 is greater than a second preset temperature threshold value T2;
step S322, if the second test temperature T2 is less than or equal to the second preset temperature threshold T2, the compressor 10 returns to the operating frequency before adjustment;
step S330, if the second testing temperature T2 is greater than the second predetermined temperature threshold T2, determining whether the second testing temperature T2 is greater than a third predetermined temperature threshold T3;
step S332, if the second test temperature T2 is less than or equal to a third preset temperature threshold T3, the compressor 10 maintains the adjusted operating frequency;
step S340, if the second testing temperature T2 is greater than the third preset temperature threshold T3, determining whether the second testing temperature T2 is greater than the fourth preset temperature threshold T4;
step S332, if the second test temperature T2 is greater than the fourth preset temperature threshold T4, the compressor 10 is stopped;
in step S344, if the second test temperature T2 is less than or equal to the fourth preset temperature threshold T4, the operating frequency of the compressor 10 is decreased again.
In this embodiment, the control method may further perform a secondary adjustment of the operating frequency of the compressor 10 after the pre-adjustment. In the pre-adjustment, the air conditioner 1 adjusts the operating frequency of the compressor 10 according to the temperature rise change rate a of the first test temperature. However, there may be a case where the adjustment in advance according to the temperature rise change rate a is not effective due to a sudden increase in load of the air conditioner 1 or the like after the adjustment in advance, and the electrolytic capacitor C actually continues to rise. In order to avoid this, the control method in this embodiment detects the internal temperature of the electrolytic capacitor C again after the second preset time interval Δ S2 is adjusted in advance, and compares the internal temperature of the electrolytic capacitor C with the second preset temperature threshold T2, the third preset temperature threshold T3, and the fourth preset temperature threshold T4, thereby adjusting the operating frequency of the compressor 10 again, and improving the reliability of the adjustment.
In this embodiment, when the second test temperature T2 is less than or equal to the second preset temperature threshold T2, the compressor 10 returns to the operating frequency before adjustment, so that the compressor 10 can obtain a larger operating frequency on the premise of ensuring the safety of the electrolytic capacitor C, the air conditioner 1 further reaches the target temperature set by the user more quickly, and the user experience is optimized.
In some embodiments of the present application, the fourth preset temperature threshold T4 is configured to be greater than the third preset temperature threshold T3; and the third preset temperature threshold T3 is configured to be greater than the second preset temperature threshold T2; and the second preset temperature threshold T2 is configured to be greater than the first preset temperature threshold T1. Those skilled in the art can configure the temperature threshold value according to the actual working condition of the air conditioner 1 and the specification of the electrolytic capacitor C.
In some embodiments of the present application, the operating frequency of the compressor 10 is reduced by a second preset multiple of the adjusted operating frequency. The second preset multiple is a preset value, for example, when the second preset multiple is configured to be 0.8, the operating frequency of the compressor 10 will be adjusted to 80% of the adjusted operating frequency.
In some embodiments of the present application, the first predetermined time interval Δ S1 and the second predetermined time interval Δ S2 are each any value selected within a range of 10-15S; and the first predetermined time interval Δ S1 and the second predetermined time interval Δ S2 are configured differently.
For example, the first preset time interval Δ S1 may be set to 10S, 12S, 13.5S, 14S, or 15S. Similarly, the second predetermined time interval Δ S2 can be selected within the range, which is not described herein.
In some specific embodiments, the second predetermined time interval Δ S2 is configured to be greater than the first predetermined time interval Δ S1 to avoid adjusting too frequently.
In some specific embodiments, the first predetermined rate of change threshold A1 and the second predetermined rate of change threshold A2 are each any value selected within a range of 1-10 ℃.
For example, the first preset rate-of-change threshold a1 may be set at 1 ℃, 5 ℃, 7.8 ℃, or 10 ℃. Similarly, the second predetermined rate of change threshold a2 can be selected from any range, which is not described herein.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (10)
1. A control method of an air conditioner compressor comprises a PFC circuit and an electrolytic capacitor connected with the output end of the PFC circuit in parallel; and, the control method includes:
detecting the internal temperature of the electrolytic capacitor to obtain a first test temperature;
judging whether the first test temperature is greater than a first preset temperature threshold value or not;
if the first test temperature is greater than a first preset temperature threshold value, calculating the temperature rise change rate of the first test temperature within a first preset time interval; and
and adjusting the running frequency of the compressor according to the temperature rise change rate of the first test temperature.
2. The control method of claim 1, wherein the step of adjusting the operating frequency of the compressor based on the rate of change of temperature rise of the first test temperature further comprises:
judging whether the temperature rise change rate of the first test temperature is greater than a first preset change rate threshold value or not;
if the temperature rise change rate of the first test temperature is larger than the first preset change rate threshold value, stopping the compressor;
if the temperature rise change rate of the first test temperature is smaller than or equal to the first preset change rate threshold, judging whether the temperature rise change rate of the first test temperature is larger than a second preset change rate threshold;
if the temperature rise change rate of the test temperature is larger than the second preset change rate threshold value, reducing the running frequency of the compressor; and
if the temperature rise change rate of the test temperature is smaller than or equal to a second preset change rate threshold value, the compressor keeps the current running frequency; and is
The first preset rate of change threshold is configured to be greater than the second preset rate of change threshold.
3. The control method of claim 2, wherein the step of reducing the operating frequency of the compressor further comprises:
the operating frequency of the compressor is reduced by a first preset multiple of the current operating frequency.
4. The control method of claim 2, wherein the step of reducing the operating frequency of the compressor further comprises:
and determining the reduction multiple of the running frequency of the compressor according to the multiple of the temperature rise change rate of the first test temperature relative to the second preset change rate threshold value.
5. The control method of claim 1, wherein the step after adjusting the operating frequency of the compressor further comprises:
obtaining the internal temperature of the electrolytic capacitor after a second preset time interval to obtain a second test temperature;
judging whether the second test temperature is greater than a second preset temperature threshold value or not;
if the second test temperature is less than or equal to a second preset temperature threshold value, the compressor recovers to the running frequency before adjustment;
if the second test temperature is greater than a second preset temperature threshold, judging whether the second test temperature is greater than a third preset temperature threshold;
if the second test temperature is less than or equal to a third preset temperature threshold, the compressor keeps the adjusted running frequency;
if the second test temperature is greater than a third preset temperature threshold, judging whether the second test temperature is greater than a fourth preset temperature threshold;
if the second test temperature is less than or equal to a fourth preset temperature threshold value, reducing the running frequency of the compressor again;
if the second test temperature is greater than a fourth preset temperature threshold value, stopping the compressor; and is
The fourth preset temperature threshold is configured to be greater than the third preset temperature threshold; and is
The third preset temperature threshold is configured to be greater than the second preset temperature threshold; and is
The second preset temperature threshold is configured to be greater than the first preset temperature threshold.
6. The control method of claim 5, wherein the step of reducing the operating frequency of the compressor again further comprises:
the operating frequency of the compressor is reduced by a second preset multiple of the adjusted operating frequency.
7. The control method according to claim 5,
the first preset time interval and the second preset time interval are any selected numerical value within the range of 10-15 s.
8. The control method according to claim 5,
the second preset time interval is configured to be greater than the first preset time interval.
9. The control method according to claim 2, wherein,
the first preset change rate threshold value and the second preset change rate threshold value are any selected numerical value within the range of 1-10 ℃.
10. An air conditioner comprising:
a controller comprising a memory and a processor, the memory having stored therein a computer program for implementing the control method according to any one of claims 1 to 9 when executed by the processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010485837.5A CN111720981A (en) | 2020-06-01 | 2020-06-01 | Control method of air conditioner compressor and air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010485837.5A CN111720981A (en) | 2020-06-01 | 2020-06-01 | Control method of air conditioner compressor and air conditioner |
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| CN111720981A true CN111720981A (en) | 2020-09-29 |
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| CN202010485837.5A Pending CN111720981A (en) | 2020-06-01 | 2020-06-01 | Control method of air conditioner compressor and air conditioner |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112564051A (en) * | 2020-11-30 | 2021-03-26 | 佛山市顺德区美的电子科技有限公司 | Overheat protection control method, device and circuit, motor controller and household appliance |
| CN113531761A (en) * | 2021-06-09 | 2021-10-22 | 宁波奥克斯电气股份有限公司 | Air conditioner control method and device and air conditioner |
| CN114688007A (en) * | 2022-03-23 | 2022-07-01 | 浙江宜格企业管理集团有限公司 | Cosmetic instrument air compressor overheating protection control method, system and equipment |
| CN116398413A (en) * | 2023-06-08 | 2023-07-07 | 深圳艾为电气技术有限公司 | Intelligent power control method and device for electric compressor |
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| CN106645880A (en) * | 2016-12-26 | 2017-05-10 | 珠海格力电器股份有限公司 | Method and device for estimating ripple current of capacitor, control method and device for variable frequency air-conditioner, frequency converter and variable frequency air-conditioner |
| CN110986190A (en) * | 2019-11-12 | 2020-04-10 | 珠海格力电器股份有限公司 | Method, device, system and medium for monitoring and analyzing performance of main board of outdoor unit of air conditioner |
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| JPH02305389A (en) * | 1989-05-17 | 1990-12-18 | Daikin Ind Ltd | Refrigeration device |
| CN105546760A (en) * | 2016-01-12 | 2016-05-04 | 芜湖美智空调设备有限公司 | Air conditioner, and control method and device for compressor of air conditioner |
| CN106645880A (en) * | 2016-12-26 | 2017-05-10 | 珠海格力电器股份有限公司 | Method and device for estimating ripple current of capacitor, control method and device for variable frequency air-conditioner, frequency converter and variable frequency air-conditioner |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112564051A (en) * | 2020-11-30 | 2021-03-26 | 佛山市顺德区美的电子科技有限公司 | Overheat protection control method, device and circuit, motor controller and household appliance |
| CN112564051B (en) * | 2020-11-30 | 2023-08-22 | 佛山市顺德区美的电子科技有限公司 | Overheat protection control method, overheat protection control device, overheat protection control circuit, motor controller and household appliance |
| CN113531761A (en) * | 2021-06-09 | 2021-10-22 | 宁波奥克斯电气股份有限公司 | Air conditioner control method and device and air conditioner |
| CN114688007A (en) * | 2022-03-23 | 2022-07-01 | 浙江宜格企业管理集团有限公司 | Cosmetic instrument air compressor overheating protection control method, system and equipment |
| CN116398413A (en) * | 2023-06-08 | 2023-07-07 | 深圳艾为电气技术有限公司 | Intelligent power control method and device for electric compressor |
| CN116398413B (en) * | 2023-06-08 | 2023-09-29 | 深圳艾为电气技术有限公司 | Intelligent power control method and device for electric compressor |
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Application publication date: 20200929 |