High pressure protection method and device for air conditioner and air conditioner

Abstract

The application provides a high-pressure protection method and device of an air conditioner and the air conditioner. The high-pressure protection method of the air conditioner comprises the following steps: determining that a compressor of the air conditioner is in an operating state, acquiring a high-pressure of the compressor, comparing the high-pressure with a set protection pressure, determining that the high-pressure is less than the set protection pressure, and adjusting an operating parameter of an electronic expansion valve and / or the compressor according to the high-pressure. The method provided by the application can avoid the shutdown of the compressor due to the excessively high high-pressure, ensure the normal operation of the air conditioner compressor, prolong the service life of the compressor, and avoid the frequent shutdown of the compressor, thereby improving the user experience.

Description

Technical Field

[0001] This invention relates to the field of electrical technology, and in particular to a high-pressure protection method, protection device, and air conditioner for air conditioning. Background Technology

[0002] In related technologies, high-capacity air conditioners typically have a high-pressure switch installed at the exhaust pipe to ensure equipment stability and prevent equipment failure caused by excessive air conditioning system pressure. However, existing high-pressure switches only have one type of shutdown disconnection protection, which is relatively rigid. In some cases where shutdown is not necessary, the system will shut down, resulting in equipment shutdown and a poor user experience. Summary of the Invention

[0003] This invention provides a high-pressure protection method, protection device, and air conditioner for air conditioning, which solves the defects in the prior art and achieves the following technical effects: it avoids the compressor from shutting down due to excessively high pressure, ensures the normal operation of the air conditioner compressor and extends the service life of the compressor, and prevents the compressor from frequently shutting down, thereby improving the user experience.

[0004] A high-pressure protection method for an air conditioner according to a first aspect embodiment of the present invention includes:

[0005] Determine that the air conditioner compressor is running, and obtain the high pressure of the compressor;

[0006] Compare the magnitude of the high pressure with the set protection pressure;

[0007] If the high pressure is determined to be less than the set protection pressure, the operating parameters of the electronic expansion valve and / or the compressor are adjusted according to the high pressure.

[0008] According to an embodiment of the present invention, the step of adjusting the operating parameters of the electronic expansion valve and / or the compressor according to the high pressure specifically includes:

[0009] Adjust the opening degree of the air conditioner's electronic expansion valve and / or the operating frequency of the compressor according to the magnitude of the high pressure.

[0010] According to one embodiment of the present invention, in the step of adjusting the opening degree of the air conditioning electronic expansion valve and / or the operating frequency of the compressor according to the magnitude of the high pressure:

[0011] Based on the fact that the high pressure is greater than the set adjustment pressure, the pressure difference between the high pressure and the set adjustment pressure is obtained;

[0012] The set opening change of the electronic expansion valve is determined based on the pressure difference, and the opening of the electronic expansion valve is controlled to increase the set opening change.

[0013] The pressure difference is positively correlated with the change in the set opening degree.

[0014] According to one embodiment of the present invention, in the step of adjusting the opening degree of the air conditioning electronic expansion valve and / or the operating frequency of the compressor according to the magnitude of the high pressure:

[0015] Based on the fact that the high pressure is greater than the set adjustment pressure, the pressure difference between the high pressure and the set adjustment pressure is obtained;

[0016] The set frequency change of the compressor is determined based on the pressure difference, and the compressor frequency is controlled to decrease by the set frequency change.

[0017] The pressure difference is positively correlated with the change in the set opening degree.

[0018] According to one embodiment of the present invention, the step of adjusting the opening degree of the air conditioning electronic expansion valve and / or the operating frequency of the compressor according to the magnitude of the high pressure specifically includes:

[0019] Based on the fact that the high pressure is greater than the set regulating pressure, the current opening degree of the electronic expansion valve is obtained;

[0020] If it is determined that the current opening size has not reached the maximum opening value, then according to the range of the high pressure, the opening of the electronic expansion valve is increased by a set opening change amount until the electronic expansion valve is fully open, and / or the frequency of the compressor is reduced by a set frequency change amount until the frequency of the compressor is reduced to the minimum frequency.

[0021] If the current opening size is determined to have reached the maximum opening size, then based on the range of the high pressure, the frequency of the compressor is controlled to decrease by a set frequency change amount until the frequency of the compressor is reduced to the minimum frequency.

[0022] According to an embodiment of the present invention, the step of determining that the current opening degree has not reached the maximum opening degree, and then controlling the opening degree of the electronic expansion valve to increase by a set opening degree change amount according to the range of the high pressure, until the electronic expansion valve is fully open, and / or controlling the operating frequency of the compressor to decrease by a set frequency change amount, until the compressor frequency is reduced to the minimum frequency, specifically includes:

[0023] It is determined that the current opening size has not reached the maximum opening value;

[0024] Based on the fact that the high pressure is in the first pressure range, the opening of the electronic expansion valve is controlled to increase by a first set opening from the original opening.

[0025] Based on the fact that the high pressure is in the second pressure range, the opening of the electronic expansion valve is increased by a second set opening from the original opening, and the frequency of the compressor is decreased by a first set frequency from the original frequency.

[0026] Wherein, the first pressure range is smaller than the second pressure range, and the first set opening degree is smaller than the second set opening degree.

[0027] According to an embodiment of the present invention, the step of determining that the current opening degree has not reached the maximum opening degree, and then controlling the opening degree of the electronic expansion valve to increase by a set opening degree change amount according to the range of the high pressure, until the opening degree of the electronic expansion valve is fully open, and / or controlling the operating frequency of the compressor to decrease by a set frequency change amount, until the frequency of the compressor is reduced to the minimum frequency, further includes:

[0028] Based on the fact that the high pressure is in the third pressure range, the opening of the electronic expansion valve is controlled to be fully open, and the frequency of the compressor is controlled to be reduced to a second set frequency from the original frequency.

[0029] Based on the fact that the high pressure is in the fourth pressure range, the opening of the electronic expansion valve is controlled to be fully open, and the frequency of the compressor is controlled to be reduced to the minimum operating frequency;

[0030] Wherein, the third pressure range is greater than the second pressure range, and the fourth pressure range is greater than the third pressure range, and the second set frequency is greater than the first set frequency.

[0031] According to an embodiment of the present invention, after the step of comparing the high pressure with the set protection pressure, the high pressure protection method for air conditioning further includes:

[0032] If the high pressure is determined to be greater than or equal to the set protection pressure, the electronic expansion valve is controlled to open fully, and the compressor is controlled to stop.

[0033] During the compressor shutdown process, the high pressure of the compressor is monitored, and when the high pressure drops to the set return pressure, the compressor is controlled to restart.

[0034] According to one embodiment of the present invention, the high-pressure protection method for air conditioning further includes:

[0035] If the number of times the compressor stops within a set operating time is greater than or equal to the set number, control the air conditioner alarm and lock the compressor in a stopped state.

[0036] A high-pressure protection device for an air conditioner according to a second aspect embodiment of the present invention includes:

[0037] The acquisition module is used to determine that the air conditioner's compressor is in operation and to acquire the high pressure of the compressor;

[0038] The analysis module is used to compare the high pressure with the set protection pressure.

[0039] An execution module is used to determine that the high pressure is less than the set protection pressure, and to adjust the operating parameters of the electronic expansion valve and / or the compressor according to the high pressure.

[0040] An air conditioner according to a third aspect embodiment of the present invention includes:

[0041] The high-pressure protection device for an air conditioner as described in the second aspect embodiment of the present invention.

[0042] This invention proposes a high-pressure protection method for air conditioners. The method obtains the high-pressure of the compressor and, when the high-pressure is lower than the set protection pressure, adjusts the electronic expansion valve and / or the compressor's operating parameters based on the specific magnitude of the high-pressure, so that the high-pressure of the compressor can be reduced to a normal level. This prevents the compressor from shutting down due to excessively high pressure, ensures the normal operation of the air conditioner compressor, extends the compressor's service life, and prevents frequent compressor shutdowns, thereby improving the user experience. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0044] Figure 1 This is a flowchart illustrating the high-pressure protection method for air conditioners provided by the present invention.

[0045] Figure 2 This is a schematic diagram of the high-pressure protection device for air conditioners provided by the present invention;

[0046] Figure 3 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0048] The high-pressure protection method, high-pressure protection device, and air conditioner of this invention are described below with reference to the accompanying drawings. Before detailing the embodiments of this invention, the overall application scenario is described first. The high-pressure protection method, high-pressure protection device, electronic device, and computer-readable storage medium of this invention can be applied locally to the air conditioner, to cloud platforms in the Internet field, or to other types of cloud platforms in the Internet field, or to third-party devices. These third-party devices may include various types such as mobile phones, tablets, laptops, in-vehicle computers, and other smart terminals.

[0049] The following explanation uses a high-pressure protection method applicable to air conditioners as an example. It should be understood that the high-pressure protection method of this invention can also be applied to cloud platforms and third-party devices. It should also be noted that the air conditioner control method proposed in this invention has universality, meaning that this method is applicable to air conditioners performing cooling or heating in both low-temperature and high-temperature environments.

[0050] like Figure 1 As shown, a high-pressure protection method for an air conditioner according to a first aspect embodiment of the present invention includes:

[0051] Step S1: Determine that the air conditioner compressor is running and obtain the compressor's high-pressure value;

[0052] Step S2: Compare the high pressure with the set protection pressure;

[0053] Step S3: Determine that the high pressure is less than the set protection pressure, and adjust the operating parameters of the electronic expansion valve and / or the compressor according to the high pressure.

[0054] The high-pressure protection method for an air conditioner according to an embodiment of the present invention has the following specific working principle and process: First, the operating status of the compressor is determined. When it is determined that the compressor is in normal operating condition, the controller acquires the high-pressure of the compressor. The high-pressure of the compressor refers to the pressure at the compressor's exhaust pipe. A high-pressure sensor is installed at the compressor's exhaust pipe. The controller can obtain the specific magnitude of the compressor's high-pressure by acquiring the detection result of the high-pressure sensor.

[0055] After receiving the compressor's high-pressure reading, the controller compares the current high-pressure reading with a preset protection pressure. If the high-pressure reading is lower than the protection pressure, the compressor does not need to stop. Instead, to reduce the compressor's high-pressure reading, the controller further adjusts the electronic expansion valve and / or the compressor's operating parameters based on the high-pressure reading. This lowers the compressor's high-pressure reading to a normal level, ensuring the normal operation of the air conditioning compressor.

[0056] In related technologies, high-capacity air conditioners typically have a high-pressure switch installed at the exhaust pipe to ensure equipment stability and prevent equipment failure caused by excessive air conditioning system pressure. However, existing high-pressure switches only have one type of shutdown disconnection protection, which is relatively rigid. In some cases where shutdown is not necessary, the system will shut down, resulting in equipment shutdown and a poor user experience.

[0057] Therefore, in order to solve the technical problems existing in the above-mentioned related technologies, the present invention proposes a high-pressure protection method for air conditioners. This method obtains the high-pressure of the compressor, and when the high-pressure is lower than the set protection pressure, adjusts the electronic expansion valve and / or the operating parameters of the compressor based on the specific magnitude of the high-pressure, so that the high-pressure of the compressor can be reduced to a normal level, avoiding the compressor from shutting down due to excessively high pressure, ensuring the normal operation of the air conditioner compressor and extending the service life of the compressor, and preventing the compressor from frequently shutting down, thereby improving the user experience.

[0058] According to some embodiments of the present invention, the step of adjusting the operating parameters of the electronic expansion valve and / or the compressor based on the high pressure specifically includes:

[0059] Adjust the opening of the air conditioner's electronic expansion valve and / or the operating frequency of the compressor according to the magnitude of the high pressure.

[0060] In this way, by adjusting the opening of the electronic expansion valve, the refrigerant flow in the system can be adjusted, thereby regulating the high pressure of the compressor. For example, when the high pressure is greater than the set adjustment pressure, the opening of the electronic expansion valve is increased, thereby increasing the total refrigerant flow in the system and reducing the high pressure of the compressor.

[0061] Furthermore, by adjusting the operating frequency of the compressor, the power of the compressor can be adjusted, thereby regulating the high-pressure pressure of the compressor. For example, when the high-pressure pressure is greater than the set adjustment pressure, the frequency of the compressor is reduced, thereby reducing the power of the compressor and thus reducing the high-pressure pressure of the compressor.

[0062] In some embodiments of the present invention, in the step of adjusting the opening degree of the air conditioning electronic expansion valve and / or the operating frequency of the compressor according to the magnitude of the high pressure:

[0063] Based on the fact that the high pressure is greater than the set regulating pressure, the pressure difference between the high pressure and the set regulating pressure is obtained;

[0064] The set opening change of the electronic expansion valve is determined based on the pressure difference, and the opening of the electronic expansion valve is controlled to increase the set opening change. The pressure difference is positively correlated with the set opening change.

[0065] It is understandable that when the high pressure is greater than the set regulating pressure, it means that the current high pressure of the compressor is too high. At this time, the high pressure of the compressor can be reduced by increasing the opening of the electronic expansion valve.

[0066] Furthermore, in order to reduce the high pressure of the compressor to the set adjustment pressure or below, the controller will acquire the pressure difference between the high pressure and the set adjustment pressure, and determine the change in the set opening of the electronic expansion valve based on the pressure difference. Thus, the larger the pressure difference, the higher the current high pressure of the compressor, and correspondingly, the opening of the electronic expansion valve will be adjusted to be larger, thereby matching the specific size of the current high pressure of the compressor and ensuring that the high pressure of the compressor can be reduced to a normal level.

[0067] In other embodiments of the present invention, in the step of adjusting the opening of the air conditioning electronic expansion valve and / or the operating frequency of the compressor according to the magnitude of the high pressure:

[0068] Based on the fact that the high pressure is greater than the set regulating pressure, the pressure difference between the high pressure and the set regulating pressure is obtained;

[0069] The compressor's set frequency change is determined based on the pressure difference, and the compressor's frequency is controlled to decrease by the set frequency change. The pressure difference is positively correlated with the change in the set opening degree.

[0070] It is understandable that when the high pressure is greater than the set adjustment pressure, it means that the current high pressure of the compressor is too high. At this time, the high pressure of the compressor can be reduced by reducing the compressor frequency.

[0071] Furthermore, in order to reduce the high pressure of the compressor to the set adjustment pressure or below, the controller will acquire the pressure difference between the high pressure and the set adjustment pressure, and determine the change in the set frequency of the compressor based on the pressure difference. Thus, the larger the pressure difference, the higher the current high pressure of the compressor, and correspondingly, the lower the frequency of the compressor will be, thereby matching the specific magnitude of the current high pressure of the compressor and ensuring that the high pressure of the compressor can be reduced to a normal level.

[0072] In the practical application of this method, some special situations may arise during the operation of adjusting the opening of the electronic expansion valve and adjusting the compressor frequency. For example, the air conditioner may encounter special situations such as the electronic expansion valve reaching its maximum opening or the compressor frequency reaching its minimum. Therefore, to ensure that this method can be applied to the above-mentioned special usage scenarios, this method also provides the following steps to achieve refined control of high-pressure protection, which are described in detail below:

[0073] According to some embodiments of the present invention, the steps of adjusting the opening degree of the air conditioning electronic expansion valve and / or the operating frequency of the compressor according to the magnitude of the high pressure specifically include:

[0074] The current opening degree of the electronic expansion valve is obtained based on the fact that the high pressure is greater than the set regulating pressure.

[0075] If it is determined that the current opening size has not reached the maximum opening size, then according to the range of the high pressure, the opening size of the electronic expansion valve is increased by a set opening change amount until the electronic expansion valve is fully open, and / or the compressor frequency is decreased by a set frequency change amount until the compressor frequency is reduced to the minimum frequency.

[0076] If the current opening degree is determined to have reached the maximum opening degree, then the compressor frequency is controlled to decrease by a set frequency change amount according to the range of high pressure, until the compressor frequency is reduced to the minimum frequency.

[0077] In this embodiment, when the high pressure is greater than the set adjustment pressure, it indicates that the high pressure is too high and needs to be reduced to a normal level. At this time, the current opening of the electronic expansion valve is first determined, and it is judged whether the current opening has reached the maximum opening value, so as to facilitate the subsequent adjustment operation based on the judgment result.

[0078] Specifically, if the opening of the electronic expansion valve does not reach its maximum value, in order to reduce the high pressure of the compressor, the controller can control the execution of at least one of the following operations: increasing the opening of the electronic expansion valve and reducing the frequency of the compressor, so that the high pressure of the compressor can be restored to the normal level.

[0079] If the electronic expansion valve is already at its maximum opening, that is, when the electronic expansion valve is fully open, the controller will reduce the compressor frequency in order to lower the compressor's high pressure, so that the compressor's high pressure can be restored to a normal level. This is because the opening of the electronic expansion valve cannot be increased further.

[0080] It should be noted that in the above operation of increasing the opening of the electronic expansion valve, when the electronic expansion valve is fully open, the controller will control the electronic expansion valve to maintain the current maximum opening value; in the above operation of reducing the compressor frequency, when the compressor frequency drops to the minimum value, the controller will control the compressor frequency to maintain the current minimum frequency.

[0081] In a specific embodiment of the present invention, if it is determined that the current opening degree has not reached the maximum opening degree, then according to the range of the high pressure, the opening degree of the electronic expansion valve is increased by a set opening degree change until the electronic expansion valve is fully open, and / or the operating frequency of the compressor is decreased by a set frequency change until the compressor frequency is reduced to the minimum frequency, the steps specifically include:

[0082] It has been determined that the current opening size has not reached the maximum opening value;

[0083] Based on the fact that the high pressure is in the first pressure range, the opening of the electronic expansion valve is increased by a first set opening from the original opening.

[0084] Based on the fact that the high pressure is in the second pressure range, the opening of the electronic expansion valve is increased by a second set opening from the original opening, and the frequency of the compressor is decreased by a first set frequency from the original frequency.

[0085] The first pressure range is smaller than the second pressure range, and the first set opening degree is smaller than the second set opening degree.

[0086] Furthermore, if it is determined that the current opening degree has not reached the maximum opening value, then based on the range of the high pressure, the opening degree of the electronic expansion valve is increased by a set opening change amount until the electronic expansion valve is fully open, and / or the operating frequency of the compressor is decreased by a set frequency change amount until the compressor frequency is reduced to the minimum frequency, the steps also include:

[0087] Based on the fact that the high pressure is in the third pressure range, the opening of the electronic expansion valve is fully opened, and the frequency of the compressor is reduced to the second set frequency from the original frequency.

[0088] Based on the fact that the high pressure is in the fourth pressure range, the electronic expansion valve is fully opened, and the compressor frequency is reduced to the minimum operating frequency.

[0089] Among them, the third pressure range is greater than the second pressure range, the fourth pressure range is greater than the third pressure range, and the second set frequency is greater than the first set frequency.

[0090] For example, the adjustment pressure is set to 3.5 MPa, the first pressure range is 3.5 MPa-3.8 MPa, and the first set opening is 50 steps; the second pressure range is 3.8 MPa-4.0 MPa, and the second set opening is 100 steps, with the first set frequency being 20 Hz; the third pressure range is 4.0 MPa-4.2 MPa, and the second set frequency is 60 Hz; the fourth pressure range is 4.2 MPa-4.4 MPa.

[0091] That is, when the compressor's high pressure is less than 3.5 MPa, no operation is performed; when the compressor's high pressure is greater than 3.5 MPa and less than 3.8 MPa, the opening of the electronic expansion valve increases by 50 steps from its original opening; when the compressor's high pressure is greater than 3.8 MPa and less than 4.0 MPa, the opening of the electronic expansion valve increases by 100 steps from its original opening, and the compressor's frequency decreases by 20 Hz from its original frequency; when the compressor's high pressure is greater than 4.0 MPa and less than 4.2 MPa, the electronic expansion valve opens fully, and the compressor's frequency decreases by 60 Hz from its original frequency; when the compressor's high pressure is greater than 4.2 MPa and less than 4.4 MPa, the electronic expansion valve opens fully, and the compressor's frequency decreases to its minimum frequency.

[0092] According to some embodiments of the present invention, after the step of comparing the high pressure with the set protection pressure, the high pressure protection method for air conditioning further includes:

[0093] Once the high pressure is confirmed to be greater than or equal to the set protection pressure, the electronic expansion valve is fully opened, and the compressor is shut down.

[0094] During compressor shutdown, the high pressure of the compressor is monitored, and when the high pressure drops to the set return pressure, the compressor is restarted.

[0095] It's understandable that when the compressor's high-pressure exceeds the set protection pressure, it indicates that the compressor's high-pressure has exceeded its tolerance limit. At this point, the high-pressure switch activates and disconnects, causing the compressor to shut down for protection. Simultaneously, the electronic expansion valve fully opens to reduce the high-pressure. This prevents the compressor from malfunctioning due to excessively high pressure and extends its service life.

[0096] For example, the protection pressure is set to 4.5 MPa and the return pressure is set to 3.7 MPa. That is, when the high pressure of the compressor reaches 4.5 MPa, the controller controls the electronic expansion valve to open fully and controls the compressor to stop. The compressor will restart after the high pressure of the compressor drops to 3.7 MPa.

[0097] According to some embodiments of the present invention, the high-pressure protection method for air conditioning further includes:

[0098] If the number of times the compressor stops within the set operating time is greater than or equal to the set number, control the air conditioner alarm and lock the compressor in a stopped state.

[0099] For example, if the compressor stops three times within an hour, the air conditioner will alarm and lock the compressor in a stopped state. The fault will be transmitted back to the indoor unit and the APP, and the compressor will not be turned on again. It should be noted that each fault is uploaded to the APP, and the first two faults are only displayed on the external panel and are not transmitted to the indoor unit.

[0100] According to some embodiments of the present invention, the high-pressure protection method for air conditioning further includes:

[0101] If the compressor's high-pressure is determined to be greater than the set regulating pressure but less than the set protection pressure, then the indoor fan speed is adjusted according to the magnitude of the high-pressure.

[0102] For example, if the high pressure is in the first pressure range, the indoor fan speed is increased by the first speed; if the high pressure is in the second pressure range, the indoor fan speed is increased by the second speed, wherein the first pressure range is smaller than the second pressure range, and the first speed is smaller than the second speed.

[0103] In this way, by increasing the speed of the indoor fan, the heat exchange process of the indoor heat exchanger can be accelerated, thereby reducing the overall pressure of the refrigerant in the system and thus reducing the high pressure of the compressor.

[0104] The high-pressure protection device for an air conditioner provided by the present invention will be described below. The high-pressure protection device for an air conditioner described below can be referred to in correspondence with the high-pressure protection method for an air conditioner described above.

[0105] like Figure 2 As shown, a high-pressure protection device for an air conditioner according to a second aspect embodiment of the present invention includes:

[0106] The acquisition module 110 is used to determine whether the air conditioner compressor is in operation and to acquire the high pressure of the compressor.

[0107] Analysis module 120 is used to compare the high pressure with the set protection pressure;

[0108] The execution module 130 is used to determine that the high pressure is less than the set protection pressure, and adjust the operating parameters of the electronic expansion valve and / or the compressor according to the high pressure.

[0109] An air conditioner according to a third aspect embodiment of the present invention includes a high-pressure protection device for the air conditioner described in the second aspect embodiment of the present invention.

[0110] According to the high-pressure protection device and air conditioner of the present invention, the high-pressure of the compressor is obtained, and when the high-pressure is lower than the set protection pressure, the operating parameters of the electronic expansion valve and / or the compressor are adjusted based on the specific magnitude of the high-pressure, so that the high-pressure of the compressor can be reduced to a normal level, avoiding the compressor from stopping due to excessively high pressure, ensuring the normal operation of the air conditioner compressor and extending the service life of the compressor, and preventing the compressor from frequently stopping, thereby improving the user experience.

[0111] Figure 3 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 3 As shown, the electronic device may include a processor 810, a communication interface 820, a memory 830, and a communication bus 840. The processor 810, communication interface 820, and memory 830 communicate with each other via the communication bus 840. The processor 810 can call logic instructions in the memory 830 to execute a high-pressure protection method for the air conditioner. This method includes: determining that the air conditioner's compressor is in operation and acquiring the compressor's high-pressure; comparing the high-pressure with a set protection pressure; determining that the high-pressure is less than the set protection pressure; and adjusting the electronic expansion valve and / or the compressor's operating parameters based on the high-pressure.

[0112] Furthermore, the logical instructions in the aforementioned memory 830 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0113] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute a high-pressure protection method for an air conditioner. The method includes: determining that the air conditioner compressor is in operation and obtaining the high-pressure of the compressor; comparing the high-pressure with a set protection pressure; determining that the high-pressure is less than the set protection pressure; and adjusting the operating parameters of the electronic expansion valve and / or the compressor according to the high-pressure.

[0114] In another aspect, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a high-pressure protection method for an air conditioner, the method comprising: determining that the air conditioner compressor is in operation and acquiring the high-pressure pressure of the compressor; comparing the high-pressure pressure with a set protection pressure; determining that the high-pressure pressure is less than the set protection pressure and adjusting the operating parameters of the electronic expansion valve and / or the compressor according to the high-pressure pressure.

[0115] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0116] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0117] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-pressure protection method for an air conditioner, characterized in that, include: Determine that the air conditioner compressor is running, and obtain the high pressure of the compressor; Compare the magnitude of the high pressure with the set protection pressure; Determine that the high pressure is less than the set protection pressure, and adjust the operating parameters of the electronic expansion valve and / or the compressor according to the high pressure. The step of adjusting the operating parameters of the electronic expansion valve and / or compressor according to the high pressure specifically includes: Adjust the opening of the air conditioner's electronic expansion valve and / or the frequency of the compressor according to the magnitude of the high pressure; In the step of adjusting the opening of the air conditioning electronic expansion valve and / or the frequency of the compressor according to the magnitude of the high pressure: Based on the fact that the high pressure is greater than the set adjustment pressure, the pressure difference between the high pressure and the set adjustment pressure is obtained; The set opening change of the electronic expansion valve is determined based on the pressure difference, and the opening of the electronic expansion valve is controlled to increase the set opening change. The pressure difference is positively correlated with the change in the set opening degree.

2. The high-pressure protection method for an air conditioner according to claim 1, characterized in that, In the step of adjusting the opening of the air conditioning electronic expansion valve and / or the frequency of the compressor according to the magnitude of the high pressure: Based on the fact that the high pressure is greater than the set adjustment pressure, the pressure difference between the high pressure and the set adjustment pressure is obtained; The set frequency change of the compressor is determined based on the pressure difference, and the compressor frequency is controlled to decrease by the set frequency change. The greater the pressure difference, the lower the compressor frequency is adjusted.

3. The high-pressure protection method for an air conditioner according to claim 1, characterized in that, The step of adjusting the opening of the air conditioning electronic expansion valve and / or the frequency of the compressor according to the magnitude of the high pressure specifically includes: Based on the fact that the high pressure is greater than the set regulating pressure, the current opening degree of the electronic expansion valve is obtained; If it is determined that the current opening size has not reached the maximum opening value, then according to the range of the high pressure, the opening of the electronic expansion valve is increased by a set opening change amount until the electronic expansion valve is fully open, and / or the frequency of the compressor is reduced by a set frequency change amount until the frequency of the compressor is reduced to the minimum frequency. If the current opening size is determined to have reached the maximum opening size, then based on the range of the high pressure, the frequency of the compressor is controlled to decrease by a set frequency change amount until the frequency of the compressor is reduced to the minimum frequency.

4. The high-pressure protection method for an air conditioner according to claim 3, characterized in that, The step of determining that the current opening degree has not reached the maximum opening degree, and then, based on the range of the high pressure, controlling the opening degree of the electronic expansion valve to increase by a set opening degree change until the electronic expansion valve is fully open, and / or controlling the compressor frequency to decrease by a set frequency change until the compressor frequency decreases to the minimum frequency, specifically includes: It is determined that the current opening size has not reached the maximum opening value; Based on the fact that the high pressure is in the first pressure range, the opening of the electronic expansion valve is controlled to increase by a first set opening from the original opening. Based on the fact that the high pressure is in the second pressure range, the opening of the electronic expansion valve is increased by a second set opening from the original opening, and the frequency of the compressor is decreased by a first set frequency from the original frequency. Wherein, the first pressure range is smaller than the second pressure range, and the first set opening degree is smaller than the second set opening degree.

5. The high-pressure protection method for an air conditioner according to claim 4, characterized in that, The step of determining that the current opening degree has not reached the maximum opening degree, and then controlling the opening degree of the electronic expansion valve to increase by a set opening degree change amount according to the range of the high pressure, until the electronic expansion valve is fully open, and / or controlling the frequency of the compressor to decrease by a set frequency change amount, until the frequency of the compressor is reduced to the minimum frequency, further includes: Based on the fact that the high pressure is in the third pressure range, the opening of the electronic expansion valve is controlled to be fully open, and the frequency of the compressor is controlled to be reduced to a second set frequency from the original frequency. Based on the fact that the high pressure is in the fourth pressure range, the opening of the electronic expansion valve is controlled to be fully open, and the frequency of the compressor is controlled to be reduced to the minimum frequency; Wherein, the third pressure range is greater than the second pressure range, and the fourth pressure range is greater than the third pressure range, and the second set frequency is greater than the first set frequency.

6. The high-pressure protection method for an air conditioner according to any one of claims 1 to 5, characterized in that, After the step of comparing the high pressure with the set protection pressure, the method further includes: If the high pressure is determined to be greater than or equal to the set protection pressure, the electronic expansion valve is controlled to open fully, and the compressor is controlled to stop. During the compressor shutdown process, the high pressure of the compressor is monitored, and when the high pressure drops to the set return pressure, the compressor is controlled to restart.

7. The high-pressure protection method for an air conditioner according to claim 6, characterized in that, Also includes: If the number of times the compressor stops within a set operating time is greater than or equal to the set number, control the air conditioner alarm and lock the compressor in a stopped state.

8. A high-pressure protection device for an air conditioner, characterized in that, include: The acquisition module is used to determine that the air conditioner's compressor is in operation and to acquire the high pressure of the compressor; The analysis module is used to compare the high pressure with the set protection pressure. The execution module is used to determine that the high pressure is less than the set protection pressure, and adjust the operating parameters of the electronic expansion valve and / or the compressor according to the high pressure. The step of adjusting the operating parameters of the electronic expansion valve and / or compressor according to the high pressure specifically includes: Adjust the opening of the air conditioner's electronic expansion valve and / or the frequency of the compressor according to the magnitude of the high pressure; In the step of adjusting the opening of the air conditioning electronic expansion valve and / or the frequency of the compressor according to the magnitude of the high pressure: Based on the fact that the high pressure is greater than the set adjustment pressure, the pressure difference between the high pressure and the set adjustment pressure is obtained; The set opening change of the electronic expansion valve is determined based on the pressure difference, and the opening of the electronic expansion valve is controlled to increase the set opening change. The pressure difference is positively correlated with the change in the set opening degree.

9. An air conditioner, characterized in that, include: The high-pressure protection device for an air conditioner as described in claim 8.

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