Air conditioner control method and air conditioner

Abstract

This invention discloses an air conditioner control method and an air conditioner. The air conditioner control method includes: responding to an external cooling control signal, determining the air conditioner's operating mode based on the air conditioner's current temperature parameters and the cooling control signal; if the operating mode includes a high-temperature cooling mode, obtaining the air conditioner's current operating frequency; if the current operating frequency does not reach the target operating frequency, obtaining the air conditioner's protection status information; if the protection status information indicates that the functional load is in a temperature protection state, adjusting the pulse of the expansion valve according to the protection type of the temperature protection state. The technical solution of this invention aims to solve the problem that the compressor's actual operating frequency is too low due to functional protection factors during high-temperature cooling.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and in particular to an air conditioner control method and an air conditioner. Background Technology

[0002] Currently, some air conditioners with electronic expansion valves are prone to triggering exhaust frequency reduction and condenser external pipe temperature limit frequency reduction protection functions during the cooling process at high temperatures due to unreasonable pulse parameter settings of the electronic expansion valve. When the air conditioner is under functional protection, it will limit the operating frequency of the compressor, 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 objective of this invention is to provide an air conditioner control method and an air conditioner, which aims to solve the problem that the compressor's actual operating frequency is too low due to functional protection factors during the high-temperature cooling process.

[0004] To achieve the above objectives, the present invention proposes 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, the operating mode of the air conditioner is determined based on the current temperature parameters of the air conditioner and the cooling control signal.

[0006] If the operating mode includes a high-temperature cooling mode, then obtain the current operating frequency of the air conditioner;

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

[0008] If the protection status information indicates that the functional load is in a temperature protection state, then 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] The protection type is determined based on the current device parameters of the functional load;

[0011] The pulse of the expansion valve is adjusted sequentially according to the preset pulse amplification rate corresponding to the determined protection type.

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

[0013] In some embodiments, the current device parameters include the current device temperature, and determining the protection type based on the current device parameters of the functional load includes:

[0014] Obtain the current device temperature of the functional load, and determine the device heating rate of the functional load based on the current device temperature;

[0015] The protection type is determined based on the device's heating rate.

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

[0017] When it is detected that the current operating frequency has not reached the preset target operating frequency, the current device temperature of the functional load is obtained;

[0018] If the current device temperature reaches the warning temperature, then the protection status 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, then the protection status 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] Control the compressor to start and obtain 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 temperature.

[0023] In some embodiments, adjusting the current pulse value of the expansion valve based on the current exhaust temperature includes:

[0024] The current exhaust temperature is matched with multiple preset reference temperature ranges to determine the reference temperature range to which the current exhaust temperature belongs.

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

[0026] In some embodiments, the current temperature parameter includes the current indoor temperature and the current outdoor temperature, and determining the operating mode of the air conditioner based on the current temperature parameter of the air conditioner and the cooling control signal includes:

[0027] The current indoor temperature and current outdoor temperature of the environment where the air conditioner is located are obtained, and the current indoor temperature is compared with a preset high indoor temperature, and the current outdoor temperature is compared with a preset high outdoor temperature.

[0028] When the current indoor temperature is not lower than the high-temperature indoor temperature and the current outdoor temperature is not lower than the high-temperature outdoor temperature, the air conditioner is determined to enter the high-temperature cooling mode according to the cooling control signal.

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

[0030] The current ambient temperature of the air conditioner and the current pipe temperature of the heat exchanger are obtained, and the current temperature difference between the current ambient temperature and the current pipe temperature is calculated.

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

[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, then the air conditioner is controlled 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 temperature protection status, then the current operating frequency is adjusted in feedback 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 also proposes an air conditioner, including 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-described air conditioner control method.

[0037] The technical solution of this invention determines 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 while cooling at high temperature. Based on the different protection types in this condition, the expansion valve is adaptively adjusted to regulate the operating frequency of the air conditioner, which helps it to meet the set power under high temperature cooling conditions. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present 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 only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0039] Figure 1 This is a flowchart illustrating an embodiment of the air conditioner control method of the present invention;

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

[0041] Figure 3 This is a flowchart illustrating another embodiment of step S100 in the present invention;

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

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

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

[0045] Figure 7 This is a flowchart illustrating another embodiment of the air conditioner control method of the present invention;

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

[0047] Figure 9 This is a schematic diagram of the structure of an embodiment of the air conditioner of the present invention.

[0048] Explanation of icon numbers:

[0049] label name label name 610 controller 630 Expansion valve 620 Functional load

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

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0052] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0053] This invention proposes an air conditioner control method.

[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, determine the operating mode of the air conditioner based on the current temperature parameters and the cooling control signal of the air conditioner;

[0056] In this embodiment, when a user needs to start the air conditioner, they can typically send a start signal to the air conditioner via a remote control, mobile phone, or other interactive components. Since the air conditioner's panel contains various information, the cooling control signal is simultaneously sent when the start signal is sent. After receiving the cooling control signal, the air conditioner uses temperature sensors, thermistors, and other temperature sensing components to collect the current temperature parameters. These current temperature parameters can be environmental parameters or the air conditioner's own temperature parameters. By processing the collected current temperature parameter values, it can be determined whether the environment in which the air conditioner is located is a high-temperature environment. If the environment is high-temperature, the air conditioner's operating mode is determined to be a high-temperature cooling mode based on the cooling control signal.

[0057] Specifically, in one embodiment, the current temperature parameter includes the current indoor temperature and the current outdoor temperature. Determining the air conditioner's operating mode based on the air conditioner's current temperature parameter and the cooling control signal includes:

[0058] S111. Obtain the current indoor temperature and current outdoor temperature of the environment where the air conditioner is located, and compare the current indoor temperature with the preset high indoor temperature and the current outdoor temperature with the preset high outdoor temperature respectively.

[0059] S112. When the current indoor temperature is not lower than the high-temperature indoor temperature and the current outdoor temperature is not lower than the high-temperature outdoor temperature, the air conditioner is determined to enter the high-temperature cooling mode according to the cooling control signal.

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

[0061] The air conditioner is equipped with a controller for judgment and calculation. The controller makes judgments based on the detected current indoor temperature and current outdoor temperature in real time. Taking a high indoor temperature of 35 degrees Celsius and an outdoor temperature of 30 degrees Celsius as an example, if 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 likely to trigger the function protection due to the high temperature environment, and therefore controls the air conditioner to enter the high temperature cooling mode.

[0062] In another embodiment, the functional load includes a heat exchanger, and the current temperature parameters include the current ambient temperature and the current pipe temperature. Determining the operating mode of the air conditioner based on the current temperature parameters and the cooling control signal includes:

[0063] S121. Obtain 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.

[0064] S122. When the current temperature difference is not greater than the preset high temperature difference, the air conditioner is determined to enter the high temperature cooling mode according to the cooling control signal.

[0065] In this embodiment, the current ambient temperature can be either the outdoor temperature or the indoor temperature. The heat exchanger includes a condenser and an evaporator. The current pipe temperature is specifically determined based on 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 subtracts 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 evaporator pipe temperature 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 where the air conditioner is located is a high temperature environment, which can easily trigger the function protection. Therefore, the air conditioner is controlled to enter the high temperature cooling mode.

[0067] S200. If the operating mode includes high-temperature cooling mode, then obtain the current operating frequency of the air conditioner;

[0068] S300. If the current operating frequency has not reached the target operating frequency, obtain the protection status information of the air conditioner.

[0069] It should be noted that during normal operation of the air conditioner, the controller has a maximum frequency curve corresponding to different air conditioner operating parameters, such as operating current and operating voltage. The maximum frequency of the air conditioner under the current operating parameters is its target operating frequency. In the air conditioner, the current pulse value of the expansion valve is set according to the internal preset curve. The required current pulse value is different under different operating parameters of the air conditioner. However, since the actual operating conditions of the air conditioner are not always consistent with the laboratory operating conditions, the actual required pulse value does not always match the pulse value obtained from the preset curve. It is easy for the pulse parameter setting of the expansion valve to be unreasonable, causing the air conditioner to erroneously trigger the exhaust frequency reduction, condenser external pipe temperature and other frequency reduction protection functions, resulting in the compressor's operating frequency being limited by the function protection and unable to reach the target operating frequency.

[0070] In this embodiment, since the current operating frequency is not reaching the target operating frequency, it may be due to the target speed of the control loop in the current controller being low, or it may be due to the temperature protection state of the functional load being triggered, which limits the frequency. Since the air conditioner in the temperature protection state cannot self-adjust through feedback loop, the controller is equipped with two judgment logics. After determining that the air conditioner has entered the high-temperature cooling mode based on 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 has reached the target operating frequency. If the current operating frequency has not reached the target operating frequency, the protection status information is further obtained to judge whether the temperature protection state of the functional load has been triggered. Only when the low frequency is caused by the temperature protection state of the functional load is triggered does the active adjustment of the high-temperature cooling mode need to be performed.

[0071] S400. If the protection status information characterization function load is in temperature protection status, the pulse of the expansion valve is adjusted according to the protection type of the temperature protection status.

[0072] It is understandable that the temperature protection state of an air conditioner is related to the temperature of its 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 air conditioner to work under 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 triggers the temperature protection state of the functional load, it determines the specific protection type of the functional load. The protection type of the temperature protection state adjusts the expansion valve pulse to different degrees, gradually amplifying the expansion valve pulse to reduce the throttling capacity of the expansion valve, thereby reducing the pressure generated at both ends and reducing the load on the functional load during operation. This cools the functional load, releases its temperature protection state, and allows the current operating frequency of the air conditioner to be regulated until the target operating frequency is reached. This reduces the likelihood of the compressor operating at an excessively low frequency due to functional protection factors during high-temperature cooling.

[0074] The technical solution of this invention determines 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 while cooling at high temperature. Based on the different protection types in this condition, the expansion valve is adaptively adjusted to regulate the operating frequency of the air conditioner, which helps it to meet the set power under high temperature cooling conditions.

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

[0076] S410. Determine the protection type based on the current device parameters of the functional load;

[0077] S420. Adjust the pulse of the expansion valve step by step according to the preset pulse amplification rate corresponding to the determined protection type.

[0078] The protection types include temperature slow-rise protection, temperature frequency limiting protection, and temperature frequency reduction protection.

[0079] In this embodiment, the current device parameters are 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 temperature, they can be the current current and power of the functional load.

[0080] Understandably, the urgency of temperature slow-rise protection, temperature frequency limiting protection, and temperature frequency reduction protection gradually increases, so their corresponding preset pulse amplification rates also increase sequentially.

[0081] Taking the preset pulse amplification rate of 10 pulses / 30s corresponding to temperature slow-rise protection and the preset pulse amplification rate of 20 pulses / 30s corresponding to temperature frequency limiting protection as examples, the following explanation will be provided:

[0082] When the temperature slow-rise protection is triggered based on the current device parameters of the functional load, the functional load is considered to be protecting itself from excessively rapid temperature rise. However, the frequency can still be increased at a relatively small rate. Therefore, the controller only needs to control the expansion valve to gradually amplify at 10 pulses / 30 seconds 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 simultaneously monitor whether the current operating frequency has reached the target operating frequency. If it has, the high-temperature cooling mode is exited; if it has not reached the target operating frequency, the pulse continues to be amplified at the first pulse amplification rate.

[0083] When the temperature-limiting frequency protection is triggered, the functional load is considered to be limited from further temperature rise. At this time, the frequency is limited to a fixed value and cannot be increased further. Therefore, it is necessary to control the expansion valve to rapidly amplify at 20 pulses / 30s to adjust the current device parameters of the functional load so that the functional load can gradually leave the protection state. At the same time, it is synchronously monitored whether the current operating frequency has reached the target operating frequency. If it has reached the target operating frequency, the high-temperature cooling mode is exited. If it has not reached the target operating frequency, the pulse continues to be amplified at the second pulse amplification rate.

[0084] When the temperature-induced frequency reduction protection is triggered, the functional load is considered to need immediate cooling. At this time, the frequency is gradually reduced. Therefore, the controller directly controls the expansion valve to be fully open so that the functional load can gradually leave the protection state as quickly as possible. At the same time, it synchronously monitors whether the current operating frequency has reached the target operating frequency. If it has reached the target operating frequency, it exits the high-temperature cooling mode. If it has not reached the target operating frequency, it continues to be fully open.

[0085] Reference Figure 5 In one embodiment, the current device parameters include the current device temperature, and determining the protection type based on the current device parameters of the functional load includes:

[0086] S411. Obtain the current device temperature of the functional load and determine the device heating rate of the functional load based on the current device temperature.

[0087] S412. Determine the protection type based on the device's heating rate.

[0088] In this embodiment, the functional load may include a compressor or a condenser. When the functional load is a compressor, the current device temperature is the current discharge 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 device heating rate, the current device temperature within a preset time period can be used as the basis for calculation. The preset time period can be 30 seconds, 1 minute, etc. The controller has multiple continuous non-overlapping heating rate ranges preset. Taking the protection types including temperature slow rise protection, temperature frequency limiting protection, and temperature frequency reduction protection as an example, the number of heating rate ranges is 3, including the first heating rate range, the second heating rate range, and the third heating rate range that increase sequentially.

[0090] After calculating the device heating rate based on the current device temperature within a 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 indicates that the exhaust temperature is rising slightly faster, and the protection type triggered is temperature slow-rise protection. If the device heating rate is within the second heating rate range, it indicates that the exhaust temperature is rising faster, and the protection type triggered is temperature frequency limiting protection. If the device heating rate is within the first heating rate range, it indicates that the exhaust temperature is rising too fast, and the protection type triggered is temperature frequency reduction protection.

[0091] The values ​​of the first heating rate range, the second heating rate range, and the third heating rate range can be set by the 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 has not reached 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 has not reached the preset target operating frequency, obtain the current device temperature of the functional load;

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

[0095] If the current device temperature has not reached the warning temperature, then protection status information indicating that the functional load is not in temperature protection state is obtained.

[0096] In this embodiment, when the functional load is a compressor, the current device temperature can be the current discharge temperature of the compressor; when the functional load is a condenser, the current device temperature can be the current pipe 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 compressor to work normally 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 at this time, it enters the temperature protection state. When the current device temperature has not reached the warning temperature, it means that the detected functional load is within the normal operating temperature range, and at this time, it is not necessary 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, it further includes:

[0099] S510 controls the compressor to start and obtains the compressor's current discharge temperature in real time;

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

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

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

[0103] S521. Match the current exhaust temperature with multiple 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 to the current pulse value of the expansion valve.

[0105] In this embodiment, the reference temperature range includes a first temperature range and a second temperature range as an example for explanation, wherein the value of the first temperature range is less than the value of the second temperature range.

[0106] When the compressor starts from 0, it needs to cool the indoor environment quickly. At this time, the first pulse value corresponding to the first temperature range should be small, so that the compressor generates higher pressure and thus quickly increases the cooling effect of the compressor. When the current discharge temperature of the compressor reaches the second temperature range, the compressor has entered a relatively smooth working process. At this time, the second pulse value is greater than the first pulse value, so that the pressure of the compressor decreases and the compressor temperature rises slowly.

[0107] Furthermore, since the compressor is still gradually approaching the target operating frequency after reaching the second temperature range, its current exhaust temperature may continue to rise due to the workload, exceeding the second temperature range and reaching the warning temperature in step S320. At this time, the compressor may accidentally trigger the temperature protection due to an unreasonable expansion valve setting, causing the current operating frequency to fail to reach the target operating frequency. Therefore, it is necessary to detect the current operating frequency of the compressor and proceed to the two judgments in steps S200 and S300 to adjust the pulse of the expansion valve in time when low frequency operation occurs due to the triggering protection, thereby releasing the temperature protection state of the compressor and enabling 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 adjusted by gradually amplifying or fully opening the valve based on the second pulse value, according to the above embodiments of steps S410 and S420.

[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 will be controlled to exit the high-temperature cooling mode.

[0111] After obtaining the air conditioner's protection status information, the following is also included:

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

[0113] In this embodiment, if the air conditioner is operating at its maximum frequency under the current conditions, which is also the target operating frequency, it means that the air conditioner can cool normally. Therefore, the high-temperature cooling mode is exited, and the pulse of the expansion valve is adjusted according to the current operating parameters of the air conditioner.

[0114] When the air conditioner is not operating at its maximum frequency under current conditions, that is, its current operating frequency has not reached the target operating frequency and the temperature protection state has not been triggered, it means that the current operating frequency of the air conditioner can be normally adjusted. 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 adjusted according to the current operating parameters of the air conditioner.

[0115] Reference Figure 9 The present invention also 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 are as described in 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 about by the technical solutions of the above embodiments, which will not be described in detail here.

[0116] The above are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An air conditioner control method, wherein the air conditioner includes a functional load and an expansion valve, characterized in that, The air conditioner control method includes: In response to an external cooling control signal, the operating mode of the air conditioner is determined based on the current temperature parameters of the air conditioner and the cooling control signal. If the operating mode includes a high-temperature cooling mode, then obtain the current operating frequency of the air conditioner; If the current operating frequency does not reach the target operating frequency, then obtain the protection status information of the air conditioner; If the protection status information indicates that the functional load is in a temperature protection state, then the pulse of the expansion valve is adjusted according to the protection type of the temperature protection state.

2. The air conditioner control method as described in claim 1, characterized in that, The adjustment of the pulse of the expansion valve according to the protection type of the temperature protection state includes: The protection type is determined based on the current device parameters of the functional load; The pulse of the expansion valve is adjusted sequentially according to the preset pulse amplification rate corresponding to the determined protection type. The protection types include temperature slow-rise protection, temperature frequency limiting protection, and temperature frequency reduction protection.

3. The air conditioner control method as described in claim 2, characterized in that, The current device parameters include the current device temperature, and determining the protection type based on the current device parameters of the functional load includes: Obtain the current device temperature of the functional load, and determine the device heating rate of the functional load based on the current device temperature; The protection type is determined based on the device's heating rate.

4. The air conditioner control method as described in 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 has not reached the preset target operating frequency, the current device temperature of the functional load is obtained; If the current device temperature reaches the warning temperature, then the protection status 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, then the protection status information indicating that the functional load is not in the temperature protection state is obtained.

5. The air conditioner control method as described in claim 1, characterized in that, The functional load includes a compressor, and before obtaining the current operating frequency of the air conditioner, it also includes: Control the compressor to start and obtain 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 temperature.

6. The air conditioner control method as described in claim 5, characterized in that, The step of adjusting the current pulse value of the expansion valve based on the current exhaust temperature includes: The current exhaust temperature is matched with multiple preset reference temperature ranges to determine the reference temperature range to which the current exhaust temperature belongs. Set the preset pulse value corresponding to the reference temperature range as the current pulse value of the expansion valve.

7. The air conditioner control method as described in claim 1, characterized in that, The current temperature parameter includes the current indoor temperature and the current outdoor temperature. Determining the operating mode of the air conditioner based on the current temperature parameter and the cooling control signal includes: The current indoor temperature and current outdoor temperature of the environment where the air conditioner is located are obtained, and the current indoor temperature is compared with a preset high indoor temperature, and the current outdoor temperature is compared with a preset high outdoor temperature. When the current indoor temperature is not lower than the high-temperature indoor temperature and the current outdoor temperature is not lower than the high-temperature outdoor temperature, the air conditioner is determined to enter the high-temperature cooling mode according to the cooling control signal.

8. The air conditioner control method as described in claim 1, characterized in that, The functional load includes a heat exchanger, the current temperature parameters include the current ambient temperature and the current pipe temperature, and determining the operating mode of the air conditioner based on the current temperature parameters of the air conditioner and the refrigeration control signal includes: The current ambient temperature of the air conditioner and the current pipe temperature of the heat exchanger are obtained, and the current temperature difference between the current ambient temperature and the current pipe temperature is calculated. When the current temperature difference is not greater than the preset high temperature difference, the air conditioner is determined to enter the high temperature cooling mode according to the cooling control signal.

9. The air conditioner control method as described in 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, then the air conditioner is controlled 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 temperature protection status, then the current operating frequency is adjusted in feedback 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, The device includes a controller, a functional load, and an expansion valve. 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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