Air conditioner control method and air conditioner

Abstract

The invention discloses an air conditioner control method and an air conditioner, and the air conditioner control method comprises the steps that in response to an external refrigeration control signal, the operation mode of the air conditioner is determined according to the current temperature parameter of the air conditioner and the refrigeration control signal; if the operation mode comprises the high-temperature refrigeration mode, the current operation frequency of the air conditioner is obtained; if the current operation frequency does not reach the target operation frequency, protection state information of the air conditioner is obtained; if the protection state information represents that the functional load is in the temperature protection state, the pulse of the expansion valve is adjusted according to the protection type of the temperature protection state; according to the technical scheme, the problem that in the high-temperature refrigeration process of the air conditioner, the actual operation frequency of the compressor is too low easily due to function protection factors is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to an air conditioner control method and an air conditioner. Background Art

[0002] At present, some air conditioners with electronic expansion valves are prone to triggering functional protections such as exhaust frequency reduction, condenser external pipe temperature limit frequency reduction, etc. during the cooling process at high temperatures due to unreasonable settings of the pulse parameters of the electronic expansion valve. When the air conditioner is under functional protection, the operating frequency of the compressor will be limited, making the actual operating frequency of the compressor lower than the required operating frequency, which in turn leads to poor cooling effect of the air conditioner. Summary of the invention

[0003] The main purpose of the present invention is to provide an air conditioner control method and an air conditioner, aiming to solve the problem that the actual operating frequency of the compressor is too low due to functional protection factors during the high-temperature refrigeration process of the air conditioner.

[0004] To achieve the above object, the present invention provides an air conditioner control method, wherein the air conditioner includes a functional load and an expansion valve, and the air conditioner control method includes:

[0005] In response to an external cooling control signal, determining an operating mode of the air conditioner according to a current temperature parameter of the air conditioner and the cooling control signal;

[0006] If the operation mode includes a high temperature cooling mode, obtaining a current operation frequency of the air conditioner;

[0007] If the current operating frequency does not reach the target operating frequency, obtaining protection status information of the air conditioner;

[0008] If the protection state information indicates that the functional load is in a temperature protection state, the pulse of the expansion valve is adjusted according to the protection type of the temperature protection state.

[0009] In some embodiments, adjusting the pulse of the expansion valve according to the protection type of the temperature protection state includes:

[0010] Determining the protection type according to current device parameters of the functional load;

[0011] According to the preset pulse amplification rate corresponding to the determined protection type, the pulse of the expansion valve is adjusted successively;

[0012] The protection types include temperature rise protection, temperature frequency limiting protection, and temperature frequency reduction protection.

[0013] In some embodiments, the current device parameter includes a current device temperature, and determining the protection type according to the current device parameter of the functional load includes:

[0014] Acquiring a current device temperature of the functional load, and determining a device heating rate of the functional load according to the current device temperature;

[0015] The protection type is determined according to the temperature rise rate of the device.

[0016] In some embodiments, if the current operating frequency does not reach the target operating frequency, obtaining the protection status information of the air conditioner includes:

[0017] When it is detected that the current operating frequency does not reach the preset target operating frequency, obtaining the current device temperature of the functional load;

[0018] If the current device temperature reaches the warning temperature, the protection state information indicating that the functional load is in a temperature protection state is obtained;

[0019] If the current device temperature does not reach the warning temperature, the protection state information indicating that the functional load is not in the temperature protection state is obtained.

[0020] In some embodiments, the functional load includes a compressor, and before obtaining the current operating frequency of the air conditioner, the method further includes:

[0021] Controlling the compressor to start, and obtaining the current exhaust temperature of the compressor in real time;

[0022] The current pulse value of the expansion valve is adjusted according to the current exhaust gas temperature.

[0023] In some embodiments, adjusting the current pulse value of the expansion valve according to the current exhaust gas temperature includes:

[0024] Matching the current exhaust temperature with a plurality of preset reference temperature ranges to determine the reference temperature range to which the current exhaust temperature belongs;

[0025] The preset pulse value corresponding to the reference temperature range is set as the current pulse value of the expansion valve.

[0026] In some embodiments, the current temperature parameter includes a current indoor temperature and a current outdoor temperature, and determining the operation mode of the air conditioner according to the current temperature parameter of the air conditioner and the cooling control signal includes:

[0027] Acquire the current indoor temperature and the current outdoor temperature of the environment where the air conditioner is located, and compare the current indoor temperature with the preset high temperature indoor temperature, and the current outdoor temperature with the preset high temperature outdoor temperature;

[0028] When the current indoor temperature is not less than the high temperature indoor temperature, and the current outdoor temperature is not less than the high temperature outdoor temperature, it is determined according to the cooling control signal that the air conditioner enters the high temperature cooling mode.

[0029] In some embodiments, the functional load includes a heat exchanger, the current temperature parameter includes a current ambient temperature and a current pipe temperature, and determining the operating mode of the air conditioner according to the current temperature parameter of the air conditioner and the cooling control signal includes:

[0030] Acquire the current ambient temperature of the air conditioner and the current pipe temperature of the heat exchanger, and calculate the current temperature difference between the current ambient temperature and the current pipe temperature;

[0031] When the current temperature difference is not greater than the preset high temperature difference, it is determined according to the cooling control signal that the air conditioner enters the high temperature cooling mode.

[0032] In some embodiments, after obtaining the current operating frequency of the air conditioner, the method further includes:

[0033] If the current operating frequency reaches the preset target operating frequency, controlling the air conditioner to exit the high temperature cooling mode;

[0034] After obtaining the protection status information of the air conditioner, the method further includes:

[0035] If the protection status information indicates that the functional load is not in the temperature protection state, the current operating frequency is feedback-adjusted until the current operating frequency reaches the target operating frequency, and the air conditioner is controlled to exit the high-temperature cooling mode.

[0036] The present invention further provides an air conditioner, comprising a controller, a functional load and an expansion valve, wherein the controller is electrically connected to the functional load and the expansion valve respectively, and is used to execute the above-mentioned air conditioner control method.

[0037] The technical solution of the present invention judges the current temperature parameters, current operating frequency and temperature protection information of the air conditioner in sequence, so as to accurately judge whether the air conditioner is in a condition where the current operating frequency cannot reach the target operating frequency due to the triggering of the temperature protection state when cooling at high temperature, and according to the different protection types in this condition, the expansion valve is adaptively adjusted to adjust the operating frequency of the air conditioner, which helps to ensure that the set power is still met under high-temperature cooling conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0039] Figure 1 A schematic diagram of a flow chart of an embodiment of an air conditioner control method of the present invention;

[0040] Figure 2 This is a flow chart of an embodiment of step S100 in the present invention;

[0041] Figure 3 is a flow chart of another embodiment of step S100 in the present invention;

[0042] Figure 4 This is a flow chart of an embodiment of step S400 in the present invention;

[0043] Figure 5 This is a flow chart of an embodiment of step S410 in the present invention;

[0044] Figure 6 This is a flow chart of an embodiment of step S300 in the present invention;

[0045] Figure 7 A flow chart of another embodiment of the air conditioner control method of the present invention;

[0046] Figure 8 This is a flow chart of an embodiment of step S520 in the present invention;

[0047] Fig. 9 It is a structural schematic diagram of an air conditioner according to an embodiment of the present invention.

[0048] Description of Figure Numbers:

[0049] Label name Label name 610 Controller 630 Expansion valve 620 Functional Load

[0050] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0053] The invention provides a method for controlling an air conditioner.

[0054] Reference Figures 1 to 3 In one embodiment, the air conditioner includes a functional load and an expansion valve, and the air conditioner control method includes:

[0055] S100, in response to an external cooling control signal, determining an operation mode of the air conditioner according to a current temperature parameter of the air conditioner and the cooling control signal;

[0056] In this embodiment, when the user needs to start the air conditioner, a start signal can usually be sent to the air conditioner through an interactive component such as a remote control or a mobile phone. Since the panel in the air conditioner includes a variety of information, when the start signal is sent, the cooling control signal in the panel is sent synchronously. After the air conditioner receives the cooling control signal, it uses a temperature sensor, a thermistor and other temperature sensing components to collect the current temperature parameter, wherein the current temperature parameter can be an environmental parameter or a temperature parameter of the air conditioner itself. Thus, by processing the value of the collected current temperature parameter, it can be determined whether the environment in which the air conditioner is located is a high temperature environment. When the environment is a high temperature environment, the operation mode of the air conditioner is determined to be a high temperature cooling mode in combination with the cooling control signal.

[0057] Specifically, in one embodiment, the current temperature parameter includes the current indoor temperature and the current outdoor temperature, and determining the operation mode of the air conditioner according to the current temperature parameter of the air conditioner and the cooling control signal includes:

[0058] S111, obtaining the current indoor temperature and the current outdoor temperature of the environment where the air conditioner is located, and comparing the current indoor temperature with the preset high temperature indoor temperature, and the current outdoor temperature with the preset high temperature outdoor temperature;

[0059] S112: When the current indoor temperature is not less than the high temperature indoor temperature and the current outdoor temperature is not less than the high temperature outdoor temperature, determine, according to the cooling control signal, that the air conditioner enters a high temperature cooling mode.

[0060] In this embodiment, the corresponding high-temperature indoor temperature and high-temperature outdoor temperature are pre-stored in the air conditioner according to the type of the current temperature parameter. At this time, the air conditioner is respectively provided with temperature sensing components for collecting the ambient temperature in the indoor unit and the outdoor unit. Among them, the high-temperature indoor temperature and the high-temperature outdoor temperature are set by the R&D personnel based on multiple experiments and the average value or mode value of the temperature that triggers the protection of the air conditioner is obtained.

[0061] The air conditioner is equipped with a controller for judgment and calculation. The controller makes judgments in real time based on the current indoor temperature and the current outdoor temperature detected. Taking the high temperature indoor temperature of 35 degrees Celsius and the indoor temperature of 30 degrees Celsius as an example, when the controller detects that the current indoor temperature is not less than 35 degrees Celsius (such as 37 degrees Celsius, 40 degrees Celsius, etc.), and the current outdoor temperature is not less than 30 degrees Celsius (such as 34 degrees Celsius, 46 degrees Celsius, etc.), it determines that the air conditioner is prone to triggering functional protection due to the high temperature environment at this time, and therefore controls the air conditioner to enter the high temperature cooling mode.

[0062] In another embodiment, the functional load includes a heat exchanger, the current temperature parameter includes a current ambient temperature and a current pipe temperature, and determining the operation mode of the air conditioner according to the current temperature parameter of the air conditioner and the cooling control signal includes:

[0063] S121, obtaining the current ambient temperature of the air conditioner and the current pipe temperature of the heat exchanger, and calculating the current temperature difference between the current ambient temperature and the current pipe temperature;

[0064] S122: When the current temperature difference is not greater than a preset high temperature difference, determining, according to the cooling control signal, that the air conditioner enters a high temperature cooling mode.

[0065] In this embodiment, the current ambient temperature may be an outdoor temperature or an indoor temperature. The heat exchanger includes a condenser and an evaporator. The current pipeline temperature is specifically determined according to the current ambient temperature.

[0066] Taking the current ambient temperature as the outdoor temperature and the heat exchanger as the evaporator as an example, the controller will subtract the current ambient temperature from the detected current pipe temperature to obtain the corresponding current temperature difference. The higher the outdoor temperature, the smaller the current temperature difference. When the difference between the pipe temperature of the evaporator and the outdoor temperature is not greater than the preset high temperature difference (such as 4 degrees Celsius, 8 degrees Celsius, etc.), it is determined that the environment in which the air conditioner is located is a high temperature environment, which is easy to trigger functional protection, so the air conditioner is controlled to enter high temperature cooling mode.

[0067] S200: If the operation mode includes a high temperature cooling mode, obtaining a current operation frequency of the air conditioner;

[0068] S300: if the current operating frequency does not reach the target operating frequency, obtaining protection status information of the air conditioner;

[0069] It should be noted that during the normal operation of the air conditioner, the controller has corresponding maximum frequency curves for different air conditioner operating parameters, such as operating current, operating voltage, etc. The maximum frequency of the air conditioner under the current operating parameters is its target operating frequency, and in the air conditioner, the current pulse value of the expansion valve is set according to the internal preset curve. Under different operating parameters of the air conditioner, the current pulse value required is also different. However, since the actual operating conditions of the air conditioner are not always consistent with the laboratory conditions, the actual required pulse value is not always consistent with the pulse value obtained by the preset curve. It is easy for the pulse parameters of the expansion valve to be set unreasonably, causing the air conditioner to mistakenly trigger functional protections such as exhaust frequency reduction and condenser external pipe temperature frequency reduction, resulting in the operating frequency of the compressor being limited by the functional protection and unable to reach the target operating frequency.

[0070] In this embodiment, when the current operating frequency has not reached the target operating frequency, it may be caused by a low target speed of the control loop in the current controller, or it may be caused by the temperature protection state of the functional load being triggered, resulting in the frequency being limited. The air conditioner in the temperature protection state cannot be self-adjusted through the feedback loop. Therefore, two judgment logics are correspondingly set in the controller. After determining that the air conditioner enters the high-temperature cooling mode according to the current temperature parameters, the current operating frequency of the air conditioner is first judged to determine whether the current operating frequency of the air conditioner reaches the target operating frequency. If the current operating frequency does not reach the target operating frequency, the protection status information is further obtained to determine whether the temperature protection state of the functional load is triggered. Only the low frequency caused by the temperature protection state of the functional load requires active adjustment of the high-temperature cooling mode.

[0071] S400: If the protection state information indicates that the functional load is in a temperature protection state, the pulse of the expansion valve is adjusted according to the protection type of the temperature protection state.

[0072] It is understandable that the temperature protection state of the air conditioner is related to the temperature of the internal functional components. The smaller the pulse of the expansion valve, the stronger the throttling capacity of the expansion valve, and the greater the pressure generated at both ends, causing the functional load of the air conditioner to work at high load and generate high temperature.

[0073] Therefore, in this embodiment, if the controller detects that the current operating frequency has not reached the target operating frequency and the temperature protection state of the functional load is triggered, the specific protection type of the functional load is judged, and the protection type of the temperature protection state adjusts the expansion valve pulse to different degrees, so as to gradually amplify the expansion valve pulse, reduce the throttling capacity of the expansion valve, reduce the pressure generated at both ends, and reduce the load of the functional load when working, thereby cooling the functional load to release the temperature protection state of the functional load, so that the current operating frequency of the air conditioner can be adjusted until the target operating frequency is reached. This reduces the occurrence of the situation where the actual operating frequency of the compressor is too low due to functional protection factors during the high-temperature cooling process of the air conditioner.

[0074] The technical solution of the present invention judges the current temperature parameters, current operating frequency and temperature protection information of the air conditioner in sequence, so as to accurately judge whether the air conditioner is in a condition where the current operating frequency cannot reach the target operating frequency due to the triggering of the temperature protection state when cooling at high temperature, and according to the different protection types in this condition, the expansion valve is adaptively adjusted to adjust the operating frequency of the air conditioner, which helps to ensure that the set power is still met under high-temperature cooling conditions.

[0075] Reference Figure 4 In one embodiment, the pulse of the expansion valve is adjusted according to the protection type of the temperature protection state, including:

[0076] S410, determining the protection type according to the current device parameters of the functional load;

[0077] S420, adjusting the pulse of the expansion valve one by one according to the preset pulse amplification rate corresponding to the determined protection type;

[0078] Among them, the protection types include temperature rise protection, temperature frequency limit protection, and temperature frequency reduction protection.

[0079] In this embodiment, the current device parameter is affected by temperature, such as the temperature corresponding to the functional load, or when the current and power of the functional load are positively correlated with the temperature, it can be the current current and current power of the functional load.

[0080] It is understandable that the urgency of the temperature slow rise protection, the temperature frequency limiting protection, and the temperature frequency reducing protection gradually increases, and therefore the corresponding preset pulse amplification rates also increase in sequence.

[0081] Take the preset pulse amplification rate of 10 pulses / 30s corresponding to the temperature slow rise protection and the preset pulse amplification rate of 20 pulses / 30s corresponding to the temperature limit frequency protection as an example for explanation:

[0082] When the temperature slow rise protection is triggered according to the current device parameters of the functional load, the functional load is considered to be protected in order to prevent the temperature from rising too quickly, but the frequency can still be increased at a smaller rate, so the controller only needs to control the expansion valve to gradually amplify at 10 pulses / 30s to prevent the functional load from continuing to heat up and extend the time for the air conditioner to increase its current operating frequency. When adjusting the expansion valve, it is necessary to synchronously monitor whether the current operating frequency reaches the target operating frequency. If it is the target operating frequency, exit the high temperature cooling mode. If it does not reach the target operating frequency, continue to amplify the pulse at the first pulse amplification rate.

[0083] When determining the triggering temperature frequency limit protection, the functional load is considered to be limited from further heating. At this time, the frequency is limited to a fixed value and cannot continue to increase. Therefore, it is necessary to control the expansion valve to quickly amplify at 20 pulses / 30s, and adjust the current device parameters of the functional load so that the functional load can gradually leave the protection state. At the same time, synchronously monitor whether the current operating frequency reaches the target operating frequency. If it is the target operating frequency, exit the high-temperature cooling mode. If it does not reach the target operating frequency, continue to amplify the pulse at the second pulse amplification rate.

[0084] When it is determined that the temperature reduction protection is triggered, the functional load is considered to need to be cooled down immediately. At this time, the frequency is gradually reduced. Therefore, the controller directly controls the expansion valve pulse to be fully open so that the functional load can gradually leave the protection state at the fastest speed. At the same time, it synchronously monitors whether the current operating frequency reaches the target operating frequency. If it is the target operating frequency, the high-temperature cooling mode is exited. If the target operating frequency is not reached, it continues to be fully open.

[0085] Reference Figure 5 In one embodiment, the current device parameter includes the current device temperature, and determining the protection type according to the current device parameter of the functional load includes:

[0086] S411, obtaining the current device temperature of the functional load, and determining the device heating rate of the functional load according to the current device temperature;

[0087] S412. Determine the protection type according to the temperature rise rate of the device.

[0088] In this embodiment, the functional load may include a compressor or a condenser, etc. When the functional load is a compressor, the current device temperature is the current exhaust temperature of the compressor. When the functional load is a condenser, the current device temperature is the current pipe temperature of the condenser.

[0089] When determining the heating rate of the device, the calculation can be based on the current device temperature within a preset time period. The preset time period can be 30 seconds, 1 minute, etc. There are multiple continuous non-overlapping heating rate ranges preset in the controller. The protection types include temperature slow rise protection, temperature frequency limiting protection, and temperature frequency reduction protection. At this time, the number of heating rate ranges is 3, including a first heating rate range, a second heating rate range, and a third heating rate range that increase in sequence.

[0090] After calculating the device heating rate according to the current device temperature within the preset time period, the device heating rate is matched with the first heating rate range, the second heating rate range, and the third heating rate range respectively. If the device heating rate is within the first heating rate range, it means that the exhaust temperature rises slightly faster, and the protection type triggered at this time is temperature slow rise protection; if the device heating rate is within the second heating rate range, it means that the exhaust temperature rises faster, and the protection type triggered at this time is temperature frequency limiting protection; if the device heating rate is within the first heating rate range, it means that the exhaust temperature rises too fast, and the protection type triggered at this time is temperature frequency reduction protection.

[0091] Among them, the values ​​of the first heating rate range, the second heating rate range, and the third heating rate range can be set by R&D personnel according to the actual working conditions of the functional load.

[0092] Reference Figure 6 In one embodiment, if the current operating frequency does not reach the target operating frequency, obtaining the protection status information of the air conditioner includes:

[0093] S310, when it is detected that the current operating frequency does not reach the preset target operating frequency, obtaining the current device temperature of the functional load;

[0094] S320, if the current device temperature reaches the warning temperature, then obtaining protection status information indicating that the functional load is in a temperature protection state; and,

[0095] If the current device temperature does not reach the warning temperature, protection state information indicating that the functional load is not in a temperature protection state is obtained.

[0096] In this embodiment, when the functional load is a compressor, the current device temperature may be the current exhaust temperature of the compressor, and when the functional load is a condenser, the current device temperature may be the current pipeline temperature.

[0097] The protection status information specifically refers to whether the functional load has reached the corresponding warning temperature. The warning temperature is set according to the critical temperature at which the detected functional load can work normally. For example, when the critical temperature for the normal operation of the compressor is 60 degrees Celsius, the warning temperature can be 50 degrees Celsius, 56 degrees Celsius, etc. When the current device temperature reaches the warning temperature, it means that the detected functional load is about to overheat, and the temperature protection state is entered at this time; when the current device temperature does not reach the warning temperature, it means that the detected functional load is within the normal working temperature range, and there is no need to enter the temperature protection state.

[0098] Reference Figure 7 In one embodiment, the functional load includes a compressor, and before obtaining the current operating frequency of the air conditioner, the method further includes:

[0099] S510, controlling the compressor to start, and obtaining the current exhaust temperature of the compressor in real time;

[0100] S520: Adjust the current pulse value of the expansion valve according to the current exhaust gas temperature.

[0101] In this embodiment, when the air conditioner is started, the compressor needs to start from 0. As its working time increases, its current exhaust temperature gradually increases. In order to adapt to the power requirements of the compressor, the startup process of the compressor is divided into multiple stages based on the value of the current exhaust temperature. Therefore, in different stages of the compressor, the current pulse value of the expansion valve is set to match the current working condition of the compressor.

[0102] Reference Figure 8 In one embodiment, adjusting the current pulse value of the expansion valve according to the current exhaust gas temperature includes:

[0103] S521, matching the current exhaust temperature with a plurality of preset reference temperature ranges to determine the reference temperature range to which the current exhaust temperature belongs;

[0104] S522: Set the preset pulse value corresponding to the reference temperature range as the current pulse value of the expansion valve.

[0105] In this embodiment, an example is taken in which the reference temperature range includes a first temperature range and a second temperature range, wherein a value of the first temperature range is smaller than a value of the second temperature range.

[0106] When the compressor starts from 0, since the indoor environment needs to be cooled down quickly, the first pulse value corresponding to the first temperature range should be smaller, so that the compressor generates a higher pressure, thereby quickly increasing the refrigeration effect of the compressor. When the current exhaust temperature of the compressor reaches the second temperature range, the compressor has entered a relatively slow working process. At this time, the second pulse value is greater than the first pulse value, which reduces the pressure of the compressor and slows down the temperature rise of the compressor.

[0107] Furthermore, since the compressor is still in a state of gradually approaching the target operating frequency after reaching the second temperature range, the current exhaust temperature may continue to rise due to the work load, exceeding the second temperature range and reaching the warning temperature as in step S320. At this time, the compressor is likely to erroneously trigger the temperature protection due to unreasonable expansion valve settings, resulting in the current operating frequency being unable to reach the target operating frequency. Therefore, it is necessary to detect the current operating frequency of the compressor and enter two judgments in steps S200 and S300, so as to timely regulate the pulse of the expansion valve when low-frequency operation occurs due to the triggered protection, release the temperature protection state of the compressor, and enable the current operating frequency of the compressor to reach the target operating frequency.

[0108] It should be noted that, in this embodiment, the pulse of the expansion valve is regulated by gradually amplifying or fully opening the expansion valve according to the above embodiments of step S410 and step S420 based on the second pulse value.

[0109] In one embodiment, after obtaining the current operating frequency of the air conditioner, the method further includes:

[0110] If the current operating frequency reaches the preset target operating frequency, the air conditioner is controlled to exit the high temperature cooling mode;

[0111] After obtaining the protection status information of the air conditioner, it also includes:

[0112] If the protection status information indicates that the functional load is not in the temperature protection state, the current operating frequency is feedback-adjusted until the current operating frequency reaches the target operating frequency, and the air conditioner is controlled to exit the high-temperature cooling mode.

[0113] In this embodiment, when the air conditioner reaches the maximum frequency under the current conditions, that is, the target operating frequency, it indicates that the air conditioner can cool normally, so the high temperature cooling mode is exited, and the pulse of the expansion valve is feedback-adjusted according to the current operating parameters of the air conditioner.

[0114] When the air conditioner is not at the maximum frequency under the current conditions, that is, its current operating frequency has not reached the target operating frequency and has not triggered the temperature protection state, it means that the current operating frequency of the air conditioner can be feedback-adjusted normally at this time. After running to the target operating frequency according to the current system parameters, the high-temperature cooling mode can be exited, and the pulse of the expansion valve can be feedback-adjusted according to the current operating parameters of the air conditioner.

[0115] Reference Fig. 9 The present invention further proposes an air conditioner, which includes a controller 610, a functional load 620 and an expansion valve 630. The controller 610 is electrically connected to the functional load 620 and the expansion valve 630, respectively, and is used to execute an air conditioner control method. The specific steps of the air conditioner control method refer to the above embodiments. Since the air conditioner adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0116] The above are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A method for controlling an air conditioner, wherein the air conditioner comprises a functional load and an expansion valve, characterized in that: The air conditioner control method comprises: In response to an external cooling control signal, determining an operating mode of the air conditioner according to a current temperature parameter of the air conditioner and the cooling control signal; If the operation mode includes a high temperature cooling mode, obtaining a current operation frequency of the air conditioner; If the current operating frequency does not reach the target operating frequency, obtaining protection status information of the air conditioner; If the protection state information indicates that the functional load is in a temperature protection state, the pulse of the expansion valve is adjusted according to the protection type of the temperature protection state.

2. The air conditioner control method according to claim 1, characterized in that: The step of adjusting the pulse of the expansion valve according to the protection type of the temperature protection state includes: Determining the protection type according to current device parameters of the functional load; According to the preset pulse amplification rate corresponding to the determined protection type, the pulse of the expansion valve is adjusted successively; The protection types include temperature rise protection, temperature frequency limiting protection, and temperature frequency reduction protection.

3. The air conditioner control method according to claim 2, characterized in that: The current device parameter includes a current device temperature, and the determining the protection type according to the current device parameter of the functional load includes: Acquiring a current device temperature of the functional load, and determining a device heating rate of the functional load according to the current device temperature; The protection type is determined according to the temperature rise rate of the device.

4. The air conditioner control method according to claim 1, characterized in that: If the current operating frequency does not reach the target operating frequency, obtaining the protection status information of the air conditioner includes: When it is detected that the current operating frequency does not reach the preset target operating frequency, obtaining the current device temperature of the functional load; If the current device temperature reaches the warning temperature, the protection state information indicating that the functional load is in a temperature protection state is obtained; and, If the current device temperature does not reach the warning temperature, the protection state information indicating that the functional load is not in the temperature protection state is obtained.

5. The air conditioner control method according to claim 1, characterized in that: The functional load includes a compressor, and before obtaining the current operating frequency of the air conditioner, the method further includes: Controlling the compressor to start, and obtaining the current exhaust temperature of the compressor in real time; The current pulse value of the expansion valve is adjusted according to the current exhaust gas temperature.

6. The air conditioner control method according to claim 5, characterized in that: The adjusting the current pulse value of the expansion valve according to the current exhaust gas temperature includes: Matching the current exhaust temperature with a plurality of preset reference temperature ranges to determine the reference temperature range to which the current exhaust temperature belongs; The preset pulse value corresponding to the reference temperature range is set as the current pulse value of the expansion valve.

7. The air conditioner control method according to claim 1, characterized in that: The current temperature parameter includes the current indoor temperature and the current outdoor temperature, and determining the operation mode of the air conditioner according to the current temperature parameter of the air conditioner and the cooling control signal includes: Acquire the current indoor temperature and the current outdoor temperature of the environment where the air conditioner is located, and compare the current indoor temperature with the preset high temperature indoor temperature, and the current outdoor temperature with the preset high temperature outdoor temperature; When the current indoor temperature is not less than the high temperature indoor temperature, and the current outdoor temperature is not less than the high temperature outdoor temperature, it is determined according to the cooling control signal that the air conditioner enters the high temperature cooling mode.

8. The air conditioner control method according to claim 1, characterized in that: The functional load includes a heat exchanger, the current temperature parameter includes a current ambient temperature and a current pipe temperature, and determining the operation mode of the air conditioner according to the current temperature parameter of the air conditioner and the cooling control signal includes: Acquire the current ambient temperature of the air conditioner and the current pipe temperature of the heat exchanger, and calculate the current temperature difference between the current ambient temperature and the current pipe temperature; When the current temperature difference is not greater than the preset high temperature difference, it is determined according to the cooling control signal that the air conditioner enters the high temperature cooling mode.

9. The air conditioner control method according to claim 1, characterized in that: After obtaining the current operating frequency of the air conditioner, the method further includes: If the current operating frequency reaches the preset target operating frequency, controlling the air conditioner to exit the high temperature cooling mode; After obtaining the protection status information of the air conditioner, the method further includes: If the protection status information indicates that the functional load is not in the temperature protection state, the current operating frequency is feedback-adjusted until the current operating frequency reaches the target operating frequency, and the air conditioner is controlled to exit the high-temperature cooling mode.

10. An air conditioner, characterized in that: It comprises a controller, a functional load and an expansion valve, wherein the controller is electrically connected to the functional load and the expansion valve respectively, and is used to execute the air conditioner control method as described in any one of claims 1-9.

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