CN115574424A - Control method and device for variable frequency air conditioner, variable frequency air conditioner and medium - Google Patents

Abstract

The application relates to the technical field of variable frequency air conditioners, and discloses a control method for a variable frequency air conditioner, which comprises the following steps: acquiring a fault state of a pressure sensor configured for the variable frequency air conditioner; under the condition that the fault state indicates that the pressure sensor is in fault, acquiring a current temperature value of a target coil corresponding to the pressure sensor; and determining an actual system pressure value of the variable-frequency air conditioner according to the current temperature value of the target coil pipe. The embodiment of the disclosure can ensure the stable operation of the refrigeration system when the pressure sensor of the inverter air conditioner breaks down, and improve the comfort level of a user. The application also discloses a control device for the variable frequency air conditioner, the variable frequency air conditioner and a medium.

Description

Control method and device for variable frequency air conditioner, variable frequency air conditioner and medium

Technical Field

The application relates to the technical field of inverter air conditioners, in particular to a control method and device for an inverter air conditioner, the inverter air conditioner and a medium.

Background

At present, with the rapid development of science and technology, the living standard of consumers is gradually improved. The air conditioner is favored by consumers because of having the functions of refrigeration, heating, dehumidification and fresh air. At the present stage, china promotes the policy of energy conservation, emission reduction and low carbon, and the frequency conversion of air conditioner products becomes a great trend in the research and development direction of air conditioners. The inverter air conditioner is provided with a refrigerating system. The refrigeration system is provided with a compressor and an inverter. After the refrigerating system detects the high pressure and the low pressure of the system through the pressure sensor, the rotating speed value of the frequency converter is controlled according to the high pressure or the low pressure so as to realize the frequency control of the compressor. Therefore, the validity of the system pressure value detected by the pressure sensor has a decisive influence on the stable operation of the refrigeration system. Therefore, when the pressure sensor fails, how to regulate and control the operation of the refrigeration system becomes a technical problem which needs to be solved urgently at present.

The related art adopts the following scheme: the high-pressure and the low-pressure of the refrigeration system are detected through the pressure sensor, and when the pressure sensor is determined to be in fault, the refrigeration system is controlled to stop running and alarm information is output, so that fault maintenance is realized.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

the technical scheme adopted by the related technology cannot realize the stable operation of the refrigerating system when the pressure sensor fails, and the comfort level of a user is influenced.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides a control method and device for a variable frequency air conditioner, the variable frequency air conditioner and a medium, so that the stable operation of a refrigerating system is ensured when a pressure sensor of the variable frequency air conditioner breaks down, and the comfort level of a user is improved.

In some embodiments, the method comprises: acquiring a fault state of a pressure sensor configured for the variable frequency air conditioner; under the condition that the fault state indicates that the pressure sensor is in fault, acquiring a current temperature value of a target coil corresponding to the pressure sensor; and determining an actual system pressure value of the variable-frequency air conditioner according to the current temperature value of the target coil pipe.

In some embodiments, the apparatus comprises: a processor and a memory storing program instructions, the processor being configured to execute the control method for an inverter air conditioner as described above when executing the program instructions.

In some embodiments, the inverter air conditioner comprises the control device for the inverter air conditioner.

In some embodiments, the storage medium stores program instructions that, when executed, perform the control method for an inverter air conditioner as before.

The control method and device for the variable frequency air conditioner, the variable frequency air conditioner and the medium provided by the embodiment of the disclosure can realize the following technical effects:

and the processor acquires the fault state of a pressure sensor configured by the variable frequency air conditioner in real time. And under the condition that the fault state indicates that the pressure sensor is in fault, determining an actual system pressure value through the current temperature value of the target coil corresponding to the pressure sensor. According to the embodiment of the disclosure, the current temperature value of the target coil pipe can be selected to determine the actual system pressure value after the pressure sensor fails, so that the frequency control of the compressor can be performed according to the actual system pressure value. Guarantee that refrigerating system also can operate steadily when pressure sensor breaks down, promote user's comfort level.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

FIG. 1 is a system schematic of an inverter air conditioner;

FIG. 2 is a schematic diagram of a control method for an inverter air conditioner according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of another control method for an inverter air conditioner according to an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of another control method for an inverter air conditioner according to an embodiment of the disclosure;

FIG. 5 is a schematic diagram of another control method for an inverter air conditioner according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of another control method for an inverter air conditioner according to an embodiment of the present disclosure;

fig. 7 is a schematic diagram of a control device for an inverter air conditioner according to an embodiment of the disclosure.

Reference numerals:

10: a compressor; 10a: a high voltage switch; 10b: a four-way valve;

201: an exhaust gas temperature sensor; 202: an intake air temperature sensor;

301: a high pressure sensor; 302: a low pressure sensor;

40: an outdoor heat exchanger; 50: an indoor heat exchanger;

60: an outdoor fan; 70: an indoor fan;

801: an indoor coil temperature sensor; 802: an outdoor coil temperature sensor;

901: an oil-liquid separator; 902: a filter; 901a: an oil return electromagnetic valve;

1001: a liquid pipe stop valve; 1002: an electronic expansion valve; 1003: a gas pipe stop valve;

200: a gas-liquid separator.

Detailed Description

So that the manner in which the features and advantages of the embodiments of the present disclosure can be understood in detail, a more particular description of the embodiments of the disclosure, briefly summarized above, may be had by reference to the appended drawings, which are included to illustrate, but are not intended to limit the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and claims of the embodiments of the disclosure and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

The term "plurality" means two or more, unless otherwise specified.

In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. E.g., a and/or B, represents: a or B, or A and B.

The term "correspond" may refer to an association or binding relationship, and a corresponds to B refers to an association or binding relationship between a and B.

Referring to fig. 1, an embodiment of the present disclosure provides a schematic diagram of an inverter air conditioner system. The inverter air conditioner system includes a compressor 10, an outdoor heat exchanger 40, an indoor heat exchanger 50, an outdoor fan 60, and an indoor fan 70. A high-voltage switch 10a and a discharge temperature sensor 201 are disposed at the discharge end of the compressor 10, and an intake temperature sensor 202 is disposed at the intake end. The compressor 10 communicates with the outdoor heat exchanger 40 and the indoor heat exchanger 50 through the four-way valve 10 b. The four-way valve 10b is provided with a first end, a second end, a third end and a fourth end. A gas line shutoff valve 1003 is disposed in a communication passage between the first end and the indoor heat exchanger 50. The second end communicates with the gas-liquid separator 200, and a low-pressure sensor 302 is disposed in a communication passage with the gas-liquid separator 200. An oil-liquid separator 901 and a high-pressure sensor 301 are disposed in a communication passage between the third end and the discharge end of the compressor 10. A filter 902 and an oil return solenoid valve 901a are disposed between the suction end of the compressor 10 and the oil separator 901. The fourth end is arranged in communication with the outdoor heat exchanger 40. The gas-liquid separator 200 is used to store a part of the refrigerant returning to the liquid, so as to prevent liquid impact on the compressor 10 and reduce dilution of the refrigerant to the compressor oil.

The outdoor heat exchanger 40 and the indoor heat exchanger 50 are provided with an outdoor coil temperature sensor 802 and an indoor coil temperature sensor 801, respectively. A liquid pipe shutoff valve 1001 and an electronic expansion valve 1002 are disposed in a communication passage between the outdoor heat exchanger 40 and the indoor heat exchanger 50.

Based on the inverter air conditioner, as shown in fig. 2, an embodiment of the present disclosure provides a control method for an inverter air conditioner, including:

and S01, acquiring the fault state of a pressure sensor configured in the variable frequency air conditioner by the processor. The pressure sensor is used for detecting the system pressure value of the inverter air conditioner in the operation stage. The pressure sensors include a high pressure sensor 301 and a low pressure sensor 302. The high-pressure sensor 301 is used for detecting a system exhaust pressure value in the operation stage of the inverter air conditioner system. The low-pressure sensor 302 is used for detecting the system suction pressure value in the operation stage of the inverter air conditioner system.

And S02, acquiring the current temperature value of the target coil corresponding to the pressure sensor by the processor under the condition that the fault state indicates that the pressure sensor is faulty.

And S03, determining an actual system pressure value of the variable frequency air conditioner by the processor according to the current temperature value of the target coil.

By adopting the control method for the variable frequency air conditioner, provided by the embodiment of the disclosure, the processor acquires the fault state of the pressure sensor configured by the variable frequency air conditioner in real time. And under the condition that the fault state indicates that the pressure sensor is in fault, determining an actual system pressure value through the current temperature value of the target coil corresponding to the pressure sensor. According to the embodiment of the disclosure, the current temperature value of the target coil pipe can be selected to determine the actual system pressure value after the pressure sensor fails, so that the frequency control of the compressor can be performed according to the actual system pressure value. Guarantee that refrigerating system also can operate steadily when pressure sensor breaks down, promote user's comfort level.

After determining the actual system pressure value of the inverter air conditioner, the processor performs frequency control on the compressor according to the actual system pressure value in a short time.

Because the coil temperature value is detected and generated by the temperature sensor and is influenced by various factors, if the actual system pressure value is determined according to the coil temperature value for a long time, the actual system pressure value has larger deviation drift with the actual system pressure value. The factors include, but are not limited to, the installation location of the temperature sensor, the refrigerant flow rate of the refrigeration system, and the arrangement of the indoor unit and/or the indoor and outdoor pipelines. When the refrigerant leaks after the refrigeration system runs for a long time, the coil pipe is usually in an overheat state, and the temperature value of the coil pipe is higher. The saturation pressure value calculated from the coil temperature value is also too high, resulting in an actual system pressure value lower than the true system pressure value. Therefore, the embodiment of the disclosure can perform short-time backup operation by replacing the system pressure value measured by the pressure sensor with the actual system pressure value corresponding to the target coil temperature value.

Optionally, as shown in fig. 3, the determining, by the processor, an actual system pressure value of the inverter air conditioner according to the current temperature value of the target coil includes:

s11, the processor obtains a target saturation pressure value corresponding to the current temperature value of the target coil.

And S12, determining an actual system pressure value according to the target saturation pressure value and the system pressure correction value by the processor. In this step, the actual system pressure value = the target saturation pressure value + the system pressure correction value.

And the system pressure correction value is determined by the target coil temperature value and the real-time system pressure value of the pressure sensor under the target working condition.

Therefore, a pressure offset exists between the target saturation pressure value corresponding to the current temperature value of the target coil and the actual system pressure value. When the variable frequency air conditioner normally operates under different working conditions, if the ambient temperature is basically kept unchanged, the pressure deviation is basically kept unchanged. To this end, embodiments of the present disclosure determine an actual system pressure value based on a target saturation pressure value and a system pressure correction value. And the pressure correction value is determined by the target coil temperature value and the real-time system pressure value of the pressure sensor under the target working condition. And the target saturated pressure value is corrected through the pressure correction value, so that the accuracy of calculation of the actual system pressure value is improved.

Optionally, the target operating condition represents an operating condition in which the ambient temperature value matches a current ambient temperature value under a current operating condition. The current operating condition indicates an operating condition in which a failure of the pressure sensor is detected. The environment temperature value is matched with the current environment temperature value, and can be equal to the current environment temperature value or within a preset range corresponding to the current environment temperature value. The preset range represents [ current ambient temperature value-temperature offset, current ambient temperature value + temperature offset ]. Wherein the temperature offset is greater than 0 ℃ and less than or equal to 1 ℃.

Optionally, as shown in connection with fig. 4, the processor obtains the system pressure correction value in the following manner:

and S21, acquiring a real-time system pressure value of the pressure sensor under a target working condition by the processor.

S22, the processor determines a saturation pressure value corresponding to the target coil temperature value under the target working condition.

And S23, the processor makes a difference value between the real-time system pressure value and the saturated pressure value to determine a system pressure correction value.

Therefore, when the inverter air conditioner normally operates under different working conditions, if the ambient temperature basically keeps unchanged, the pressure deviation basically keeps unchanged, and therefore, the difference value between the real-time system pressure value and the saturation pressure value obtained under the target working condition is determined as the system pressure correction value in the embodiment of the disclosure, so that the actual system pressure value is accurately determined. The accuracy of calculation of the pressure value of the actual system is improved.

With reference to fig. 5, an embodiment of the present disclosure further provides a control method for an inverter air conditioner, including:

and S31, the processor acquires the current pressure value of the pressure sensor configured by the inverter air conditioner.

And S32, controlling the variable frequency air conditioner to operate according to the operation parameters under the target working condition by the processor under the condition that the current pressure value represents the suspected fault of the pressure sensor.

In this step, a suspected fault of the pressure sensor is determined in the following manner: the absolute value of the difference between the current pressure value and the pressure threshold is greater than or equal to the pressure deviation threshold. When the resistance value of the pressure sensor drifts or mechanical faults occur, the detected pressure value suddenly changes (suddenly rises or drops), so that whether the pressure sensor is suspected to be in faults can be judged by comparing the absolute value of the difference value between the current pressure value and the pressure threshold value with the pressure deviation threshold value.

And S33, the processor acquires the pressure value to be measured of the pressure sensor under the target working condition.

And S34, determining the fault state of the pressure sensor by the processor according to the pressure value to be detected.

In this step, the processor determines the fault state of the pressure sensor according to the pressure value to be measured, including: and determining that the pressure sensor is in fault under the condition that the absolute value of the difference value between the pressure value to be measured and the pressure threshold value is greater than or equal to the pressure deviation threshold value. And determining that the pressure sensor is normal under the condition that the absolute value of the difference value between the pressure value to be measured and the pressure threshold value is smaller than the pressure deviation threshold value. When the pressure value to be measured is the system exhaust pressure value, the pressure threshold is an exhaust pressure threshold, and the pressure deviation threshold is an exhaust pressure deviation threshold. And when the pressure to be measured is the system suction pressure value, the pressure threshold is the suction pressure threshold. The pressure deviation threshold is an inspiratory pressure deviation threshold.

And S35, acquiring the fault state of the pressure sensor configured by the inverter air conditioner by the processor.

And S36, under the condition that the fault state indicates that the pressure sensor is in fault, the processor acquires the current temperature value of the target coil corresponding to the pressure sensor.

And S37, determining the actual system pressure value of the variable frequency air conditioner by the processor according to the current temperature value of the target coil.

By adopting the control method for the variable frequency air conditioner provided by the embodiment of the disclosure, after the suspected fault of the pressure sensor is determined, the variable frequency air conditioner is forced to operate under the target working condition, the pressure value to be measured is obtained again, and the corresponding fault judgment is carried out. And when the absolute value of the difference value between the pressure value to be detected of the compressor and the pressure threshold value is still larger than or equal to the pressure deviation threshold value, indicating that the pressure value detected by the pressure sensor continuously changes suddenly, and determining that the pressure sensor has a fault. Therefore, the accuracy of fault judgment of the pressure sensor is further improved.

Optionally, the processor controls the inverter air conditioner to operate according to the operation parameters under the target working condition, including:

the processor controls the device to operate with the operating parameter in a previous sensing period adjacent to the current sensing period.

Therefore, in the running process of the variable frequency air conditioner, under the condition that the compressor, the outdoor fan, the indoor fan and the electronic expansion valve have no faults, the respective running parameters of the devices cannot change suddenly in time sequence. Therefore, the processor forcibly restores the operation of the compressor, the outdoor fan, the indoor fan and the electronic expansion valve according to the operation parameters in the previous detection period adjacent to the current detection period, so as to eliminate the influence of the compressor, the outdoor fan, the indoor fan and the electronic expansion valve on the pressure value detected by the pressure sensor and improve the reliability of fault judgment of the pressure sensor.

Optionally, the processor controls the inverter air conditioner to operate according to the operation parameters under the target working condition, and the method includes:

the processor controls the device to operate with operating parameters of a preset condition matched with the current indoor ambient temperature.

The device comprises a compressor, an outdoor fan, an indoor fan and an electronic expansion valve, wherein the device comprises part or all of the compressor, the outdoor fan, the indoor fan and the electronic expansion valve.

Therefore, the target working condition is the working condition that the ambient temperature value is matched with the current ambient temperature value under the current working condition, so that when the variable frequency air conditioner is controlled to operate under the target working condition, the influence of the compressor, the outdoor fan, the indoor fan and the electronic expansion valve on the pressure value generated by the pressure value detected by the pressure sensor can be quickly eliminated, and the reliability of fault judgment of the pressure sensor is improved.

Optionally, as shown in fig. 6, the acquiring, by the processor, a current temperature value of the target coil corresponding to the pressure sensor includes:

and S41, acquiring the operation mode of the inverter air conditioner and the pressure type of the pressure sensor by the processor.

And S42, determining the current temperature value of the target coil according to the operation mode and the pressure type by the processor.

Therefore, the current temperature value of the target coil corresponding to the operation mode and the pressure type can be matched quickly and accurately, and the reliability of the pressure value of the actual system is improved. Therefore, the refrigerating system can be ensured to stably operate when the pressure sensor fails, and the comfort of a user is improved.

Optionally, the processor determines the current temperature value of the target coil according to the operation mode and the pressure type, including:

and under the condition that the processor operates in a refrigeration mode and the system pressure type is the exhaust pressure, determining the current temperature value of the outer coil as the target coil temperature value.

And under the condition that the processor operates in a refrigeration mode and the system pressure type is suction pressure, determining the current temperature value of the inner coil as a target coil temperature value.

And the processor determines the current temperature value of the inner coil as the target coil temperature value under the condition that the system is operated in the heating mode and the system pressure type is the exhaust pressure.

And the processor determines the current temperature value of the outer coil as the target coil temperature value under the condition that the heating mode is operated and the system pressure type is the suction pressure.

Therefore, when the variable frequency air conditioner operates in a cooling mode, the outdoor coil temperature sensor is used for backup when the high-pressure sensor fails, and the indoor coil temperature sensor is used for backup when the low-pressure sensor fails. When the variable frequency air conditioner operates in a heating mode, the temperature sensor of the outdoor coil is used for backup use when the low-pressure sensor fails, and the temperature sensor of the indoor coil is used for backup use when the high-pressure sensor fails. The accuracy and the reliability of the pressure acquisition of the system are improved.

In practical application, as shown in fig. 1, the high-pressure sensor 301 is used for detecting a system exhaust pressure value P at an operation stage of the inverter air conditioner system _{Row board} . The low-pressure sensor 302 is used for detecting a system suction pressure value P in the operation stage of the inverter air conditioner system _{Suction device} . The operation frequency of the compressor 10, the rotation speed of the outdoor fan 60, the rotation speed of the indoor fan 70, and the opening degree of the electronic expansion valve 1002 are f and N, respectively _Outdoors 、N _Indoor 、d。

The high-pressure sensor 301 and the low-pressure sensor 302 detect respective system pressure values with an acquisition cycle of Δ t. The outdoor coil temperature sensor 802 is used to detect the coil condensing temperature T of the outdoor heat exchanger 40, and the collection period is Δ T.

As an example, the control method for the inverter air conditioner performs the following steps:

s51, the variable frequency air conditioner operates in a refrigeration mode, and is high under the condition that resistance value drifting or mechanical disconnection faults occur to the high-pressure sensorThe current system exhaust pressure value obtained by the pressure sensor in real time is P _{Current exhaust gas} . Judged, | P _{Current exhaust gas} -P _{Exhaust pressure threshold} |>ΔP _{Exhaust of gases} And determining that the high-pressure sensor is suspected to be in fault. P is _{Exhaust pressure threshold} 、ΔP _{Exhaust of gases} Respectively, an exhaust pressure threshold value and an exhaust pressure deviation threshold value.

S52, the processor forcibly controls the compressor to recover to the frequency operation in the previous detection period, forcibly controls the indoor and outdoor fans to recover to the rotating speed operation in the previous detection period, and forcibly recovers the electronic expansion valve to the opening operation in the previous detection period. The processor obtains the pressure value P to be measured under the target working condition _{Exhaust gas to be measured} . Judged, | P _{Exhaust gas to be measured} -P _{Exhaust pressure threshold} |>ΔP _{Exhaust of gases} And eliminating the influence of the compressor, the indoor and outdoor fans and the electronic expansion valve on the high-pressure value of the system, and judging the fault of the high-pressure sensor.

And S53, acquiring the fault state of the high-pressure sensor by the processor, and confirming that the high-pressure sensor is in fault. The processor acquires the current temperature value T of the outdoor coil acquired by the outdoor coil temperature sensor corresponding to the high-pressure sensor in real time _{External coiled pipe} And the current temperature value T of the external coil pipe is used _{External coiled pipe} As a target coil temperature value. And obtaining the current temperature value T of the external coil _{External coil pipe} Corresponding saturation pressure value P _{Real-time outdoor saturation} 。

S54, the processor obtains a saturation pressure value P corresponding to the temperature value of the outdoor coil temperature sensor under the S52 target working condition _{Outdoor saturation} A pressure value P to be measured _{Exhaust gas to be measured} The pressure difference value is compared with the saturated pressure value to determine the system exhaust pressure correction value delta P ₀ ＝P _{Exhaust gas to be measured} -P _{Outdoor saturation} 。

S55, the processor compares P _{Real-time outdoor saturation} And Δ P ₀ Adding to obtain P _{Real-time outdoor saturation} +ΔP ₀ And the operation of the system is controlled by taking the actual system exhaust pressure value as the actual system exhaust pressure value.

As another example, a control method for an inverter air conditioner performs the steps of:

s61, the variable frequency air conditioner operates in a refrigeration mode, and the current system suction pressure value obtained by the low-pressure sensor in real time is P under the condition that the resistance value of the low-pressure sensor drifts or the mechanical disconnection fault occurs _{Current inspiration} . Judged, | P _{Current inspiration} -P _{Threshold of inspiratory pressure} |>ΔP _{Air suction} And determining that the high-pressure sensor is suspected to be in fault. P _{Threshold of inspiratory pressure} 、ΔP _{Air suction} Respectively, an intake pressure threshold value and an intake pressure deviation threshold value.

S62, the processor forcibly controls the compressor to recover to the frequency operation in the previous detection period, forcibly controls the indoor and outdoor fans to recover to the rotating speed operation in the previous detection period, and forcibly recovers the electronic expansion valve to the opening operation in the previous detection period. The processor obtains the pressure value P to be measured under the target working condition _{Air suction to be measured} . Judged, | P _{Air suction to be measured} -P _{Inspiratory pressure threshold} |>ΔP _{Air suction} And eliminating the influence of the compressor, the indoor and outdoor fans and the electronic expansion valve on the low-pressure value of the system, and judging the fault of the low-pressure sensor.

And S63, acquiring the fault state of the low-pressure sensor by the processor, and confirming that the low-pressure sensor is in fault. The processor acquires the current temperature value T of the indoor coil pipe acquired by the indoor coil pipe temperature sensor corresponding to the low-pressure sensor in real time _{Inner coiled pipe} And the current temperature value T of the inner coil pipe is used _{Inner coil pipe} As a target coil temperature value. And obtaining the current temperature value T of the inner coil _{Inner coiled pipe} Corresponding saturation pressure value P _{Real-time indoor saturation} 。

S64, the processor obtains a saturation pressure value P corresponding to the temperature value of the indoor coil temperature sensor under the S62 target working condition _{Indoor saturation} A pressure value P to be measured _{Air suction to be measured} Determining the corrected value delta P of the system suction pressure by taking the difference value with the saturated pressure value ₁ ＝P _{Air suction to be measured} -P _{Indoor saturation} 。

S65, the processor compares P _{Real-time indoor saturation} And Δ P ₁ Adding to obtain P _{Real-time indoor saturation} +ΔP ₁ And the operation of the system is controlled by taking the actual system suction pressure value as the actual system suction pressure value.

As shown in fig. 7, the present disclosure provides a control device for an inverter air conditioner, which includes a processor (processor) 100 and a memory (memory) 101. Optionally, the apparatus may also include a Communication Interface (Communication Interface) 102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other via a bus 103. The communication interface 102 may be used for information transfer. The processor 100 may call the logic instructions in the memory 101 to execute the control method for the inverter air conditioner of the above embodiment.

In addition, the logic instructions in the memory 101 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products.

The memory 101, which is a computer-readable storage medium, may be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 executes functional applications and data processing by executing program instructions/modules stored in the memory 101, that is, implements the control method for the inverter air conditioner in the above-described embodiments.

The memory 101 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. In addition, the memory 101 may include a high-speed random access memory, and may also include a nonvolatile memory.

The embodiment of the disclosure provides an inverter air conditioner, which comprises the control device for the inverter air conditioner.

The disclosed embodiments provide a computer-readable storage medium storing computer-executable instructions configured to perform the above-described control method for an inverter air conditioner.

The disclosed embodiments provide a computer program product comprising a computer program stored on a computer-readable storage medium, the computer program comprising program instructions that, when executed by a computer, cause the computer to perform the above-described control method for an inverter air conditioner.

The computer-readable storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.

The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes one or more instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising a …" does not exclude the presence of additional like elements in a process, method, or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.

Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the technical solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between the different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

Claims (10)

1. A control method for an inverter air conditioner is characterized by comprising the following steps:

acquiring a fault state of a pressure sensor configured for the variable frequency air conditioner;

under the condition that the fault state indicates that the pressure sensor is in fault, acquiring a current temperature value of a target coil corresponding to the pressure sensor;

and determining an actual system pressure value of the variable-frequency air conditioner according to the current temperature value of the target coil pipe.

2. The method of claim 1, wherein the determining an actual system pressure value of the inverter air conditioner according to the target coil current temperature value comprises:

acquiring a target saturation pressure value corresponding to the current temperature value of the target coil pipe;

determining an actual system pressure value according to the target saturation pressure value and the system pressure correction value;

and the system pressure correction value is determined by the target coil temperature value and the real-time system pressure value of the pressure sensor under the target working condition.

3. The method according to claim 2, wherein the system pressure correction value is obtained as follows:

acquiring a real-time system pressure value of the pressure sensor under the target working condition;

determining a saturation pressure value corresponding to the target coil temperature value under the target working condition;

and determining a system pressure correction value by taking the difference value between the real-time system pressure value and the saturation pressure value.

4. The method of claim 2, wherein prior to obtaining the fault status of the pressure sensor of the inverter air conditioner configuration, further comprising:

acquiring a current pressure value of a pressure sensor configured for the variable frequency air conditioner;

under the condition that the current pressure value represents suspected faults of the pressure sensor, controlling the variable frequency air conditioner to operate according to the operating parameters under the target working condition;

acquiring a pressure value to be measured of the pressure sensor under the target working condition;

and determining the fault state of the pressure sensor according to the pressure value to be detected.

5. The method of claim 4, wherein the controlling the inverter air conditioner to operate at the operating parameters of the target operating condition comprises:

controlling the device to operate with an operating parameter in a previous sensing period adjacent to the current sensing period; alternatively, the first and second electrodes may be,

controlling the device to operate according to the operation parameters of the preset working condition matched with the current indoor environment temperature;

the device comprises a compressor, an outdoor fan, an indoor fan and part or all of an electronic expansion valve.

6. The method according to any one of claims 1 to 5, wherein the obtaining of the current temperature value of the target coil corresponding to the pressure sensor comprises:

acquiring an operation mode of the variable frequency air conditioner and a pressure type of the pressure sensor;

and determining the current temperature value of the target coil according to the operation mode and the pressure type.

7. The method of claim 6, wherein determining a target coil current temperature value based on the operating mode and the pressure type comprises:

under the condition that the system operates in a refrigeration mode and the system pressure type is the exhaust pressure, determining the current temperature value of the outer coil as a target coil temperature value;

under the condition that the system operates in a refrigeration mode and the system pressure type is suction pressure, determining the current temperature value of the inner coil as a target coil temperature value;

under the condition that the system operates in a heating mode and the system pressure type is exhaust pressure, determining the current temperature value of the inner coil as a target coil temperature value;

and under the condition that the system is operated in a heating mode and the system pressure type is the suction pressure, determining the current temperature value of the outer coil as the target coil temperature value.

8. A control apparatus for an inverter air conditioner comprising a processor and a memory storing program instructions, characterized in that the processor is configured to execute the control method for an inverter air conditioner according to any one of claims 1 to 7 when executing the program instructions.

9. An inverter air conditioner, characterized by comprising the control device for an inverter air conditioner according to claim 8.

10. A storage medium storing program instructions, characterized in that the program instructions, when executed, perform the control method for an inverter air conditioner according to any one of claims 1 to 7.

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