Air conditioner and control method thereof

Abstract

The invention discloses an air conditioner and a control method thereof, and relates to the technical field of air conditioners, the control method comprises the steps that the air conditioner is started, the outdoor environment temperature and the indoor real-time temperature are obtained, the initial operation frequency of a compressor is determined according to the outdoor environment temperature and the operation mode of the air conditioner, and the compressor operates at the initial operation frequency; and when the indoor real-time temperature reaches the shutdown temperature, the compressor is shut down, and when the indoor real-time temperature reaches the restart temperature, the compressor is restarted and operates at the frequency smaller than the initial operation frequency, so that the indoor real-time temperature reaches the shutdown temperature again. According to the control method of the air conditioner, frequent starting of the compressor can be avoided, and the reliability and safety of the air conditioner can be guaranteed.

Description

Technical Field

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

[0002] In the prior art, after the user starts the air conditioner with a set temperature, the air conditioner determines the target operating frequency of the compressor according to the current outdoor ambient temperature, and the compressor operates at the target operating frequency. When the indoor ambient temperature reaches the shutdown temperature, the compressor shuts down. When the indoor ambient temperature exceeds the restart temperature, the compressor restarts and operates at the target operating frequency, so that the indoor ambient temperature approaches the set temperature again, and so on in a cycle. When the compressor operates at a fixed target operating frequency, the indoor ambient temperature easily reaches the set temperature, resulting in frequent start and stop of the compressor. Vibration and noise problems caused by power mutation occur instantaneously when the compressor starts and stops, which further leads to an increase in noise and seriously affects the service life of the compressor, thereby greatly reducing the reliability and safety of the air conditioner. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. For this purpose, the present invention provides a control method for an air conditioner, which can avoid frequent start and stop of the compressor and is beneficial to ensuring the reliability and safety of the air conditioner.

[0004] The present invention also provides an air conditioner capable of executing the above control method.

[0005] According to the control method of the air conditioner according to the first aspect embodiment of the present invention, the air conditioner is preset with a frequency difference; when the air conditioner starts, it obtains the outdoor ambient temperature and the indoor real-time temperature, and determines the initial operating frequency of the compressor according to the outdoor ambient temperature and the operating mode of the air conditioner, and the compressor operates at the initial operating frequency; when the air conditioner operates in the heating mode, when the indoor real-time temperature is equal to or greater than the first shutdown temperature, the compressor shuts down, records the operating frequency before the compressor shuts down and defines this operating frequency as the first temperature-reaching frequency, wherein the first shutdown temperature is greater than the set temperature. When the indoor real-time temperature is equal to or less than the first restart temperature, the compressor restarts and operates at the first frequency, wherein the first frequency is equal to the first temperature-reaching frequency minus the frequency difference, and the first restart temperature is less than the set temperature; when the air conditioner operates in the cooling mode, when the indoor real-time temperature is equal to or less than the second shutdown temperature, the compressor shuts down, records the operating frequency before the compressor shuts down and defines this operating frequency as the second temperature-reaching frequency, wherein the second shutdown temperature is less than the set temperature. When the indoor real-time temperature is equal to or greater than the second restart temperature, the compressor restarts and operates at the second frequency, and the second frequency is equal to the second temperature-reaching frequency minus the frequency difference, and the second restart temperature is greater than the set temperature.

[0006] At least has the following beneficial effects:

[0007] In the heating mode, the first shutdown temperature is greater than the preset temperature, delaying the shutdown time node of the compressor. The first restart temperature is less than the preset temperature, delaying the restart time node of the compressor. And the compressor runs at a first frequency less than the initial operating frequency after restart, slowing down the speed at which the indoor temperature rises to the first shutdown temperature, further lengthening the time interval between the shutdown time node and the restart time node of the compressor, resulting in fewer start-stop times of the compressor per unit time, thereby avoiding frequent start-stop of the compressor and being beneficial to ensuring the reliability and safety of the air conditioner. In the cooling mode, the second shutdown temperature is less than the preset temperature, delaying the shutdown time node of the compressor. The second restart temperature is greater than the preset temperature, delaying the restart time node of the compressor. And the compressor runs at a second frequency less than the initial operating frequency after restart, slowing down the speed at which the indoor temperature drops to the second shutdown temperature, further lengthening the time interval between the shutdown time node and the restart time node of the compressor, resulting in fewer start-stop times of the compressor per unit time, thereby avoiding frequent start-stop of the compressor and being beneficial to ensuring the reliability and safety of the air conditioner.

[0008] According to the control method of the air conditioner according to the first aspect embodiment of the present invention, a first time threshold is preset; when the air conditioner operates in the heating mode, when the indoor real-time temperature is equal to or less than the first restart temperature, the compressor restarts and runs at the first frequency, obtaining the first real-time running time of the compressor, and determining whether the indoor real-time temperature satisfies a first condition, where the first condition is that the indoor real-time temperature is equal to or greater than the first shutdown temperature. If the indoor real-time temperature satisfies the first condition, the compressor shuts down; if the indoor real-time temperature does not satisfy the first condition, determining whether the first real-time running time and the indoor real-time temperature satisfy a second condition, where the second condition is that the first real-time running time is greater than the first time threshold and the indoor real-time temperature is less than the set temperature. If the first real-time running time and the indoor real-time temperature do not satisfy the second condition, continue to determine whether the indoor real-time temperature satisfies the first condition.

[0009] According to the control method of the air conditioner according to the first aspect embodiment of the present invention, if the first real-time operation time and the indoor real-time temperature satisfy the second condition, record the current operation frequency of the compressor and define this frequency as the first current frequency, increase the operation frequency of the compressor from the first current frequency to the first efficiency-increasing frequency, and the compressor operates at the first efficiency-increasing frequency. At the same time, clear the first real-time operation time and re-obtain the first real-time operation time, and continue to judge whether the indoor real-time temperature satisfies the first condition, where the first efficiency-increasing frequency is equal to the sum of the first current frequency and the frequency difference.

[0010] According to the control method of the air conditioner according to the first aspect embodiment of the present invention, preset a second time threshold; when the air conditioner operates in the cooling mode, when the indoor real-time temperature is equal to or higher than the second restart temperature, the compressor restarts and operates at the second frequency, obtain the second real-time operation time of the compressor, and judge whether the indoor real-time temperature satisfies the third condition, where the third condition is that the indoor real-time temperature is equal to or lower than the second shutdown temperature. If the indoor real-time temperature satisfies the third condition, the compressor shuts down; if the indoor real-time temperature does not satisfy the third condition, judge whether the second real-time operation time and the indoor real-time temperature satisfy the fourth condition, where the fourth condition is that the second real-time operation time is greater than the second time threshold and the indoor real-time temperature is greater than the set temperature. If the second real-time operation time does not satisfy the fourth condition, continue to judge whether the indoor real-time temperature satisfies the third condition.

[0011] According to the control method of the air conditioner according to the first aspect embodiment of the present invention, if the second real-time operation time and the indoor real-time temperature satisfy the fourth condition, record the current operation frequency of the compressor and define this frequency as the second current frequency, increase the operation frequency of the compressor from the second current frequency to the second efficiency-increasing frequency, and the compressor operates at the second efficiency-increasing frequency. At the same time, clear the second real-time operation time and re-obtain the second real-time operation time, and continue to judge whether the indoor real-time temperature satisfies the third condition, where the second efficiency-increasing frequency is equal to the sum of the second current frequency and the frequency difference.

[0012] According to the control method of the air conditioner according to the first aspect embodiment of the present invention, preset a first temperature value and a second temperature value, the sum of the first temperature value and the set temperature is equal to the first shutdown temperature, and the set temperature minus the second temperature value is equal to the first restart temperature.

[0013] According to the control method of the air conditioner according to the first aspect embodiment of the present invention, preset a first frequency value, the initial operation frequency minus the first frequency value is equal to the first frequency.

[0014] For the control method of an air conditioner according to an embodiment of the first aspect of the present invention, a third temperature value and a fourth temperature value are preset. The set temperature minus the third temperature value equals the second shutdown temperature, and the set temperature plus the fourth temperature value equals the second restart temperature.

[0015] For the control method of an air conditioner according to an embodiment of the first aspect of the present invention, a second frequency value is preset. The initial operating frequency minus the second frequency value equals the second frequency.

[0016] The air conditioner according to an embodiment of the second aspect of the present invention includes a control device. The control device includes a processor and a memory. The processor is connected to the memory. The memory stores a control program. The processor is configured to call and execute the control program stored in the memory. The control program is used to execute the above-mentioned control method of the air conditioner.

[0017] It has at least the following beneficial effects: This air conditioner has all the beneficial effects brought by the above control method, and will not be repeated here.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings

[0019] The following further describes the present invention in conjunction with the drawings and embodiments, where:

[0020] Figure 1 is the logic flowchart of the control method of the air conditioner in the heating mode according to the embodiment of the present invention;

[0021] Figure 2 is the logic flowchart of the control method of the air conditioner in the cooling mode according to the embodiment of the present invention. Detailed Embodiments

[0022] The embodiments of the present invention are described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0023] In the description of the present invention, it should be understood that with respect to the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., it is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0024] In the description of the present invention, "a plurality of" refers to more than two. If there is a description of first and second, it is only for the purpose of distinguishing technical features, and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0025] In the description of the present invention, unless otherwise clearly defined, terms such as "arrangement", "installation", "connection", etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0026] Reference Figure 1 and Figure 2 The present invention discloses a control method for an air conditioner. The control method includes: the air conditioner presetting a frequency difference value; the air conditioner starting, acquiring the outdoor ambient temperature and the indoor real-time temperature, determining the initial operating frequency of the compressor according to the outdoor ambient temperature and the operating mode of the air conditioner, and the compressor operating at the initial operating frequency; when the air conditioner operates in the heating mode, when the indoor real-time temperature is equal to or greater than the first shutdown temperature, the compressor shuts down, records the operating frequency before the compressor shuts down and defines this operating frequency as the first temperature-reaching frequency, where the first shutdown temperature is greater than the set temperature, and when the indoor real-time temperature is equal to or less than the first restart temperature, the compressor restarts and operates at the first frequency, where the first frequency is equal to the first temperature-reaching frequency minus the frequency difference value, and the first restart temperature is less than the set temperature; when the air conditioner operates in the cooling mode, when the indoor real-time temperature is equal to or less than the second shutdown temperature, the compressor shuts down, records the operating frequency before the compressor shuts down and defines this operating frequency as the second temperature-reaching frequency, where the second shutdown temperature is less than the set temperature, and when the indoor real-time temperature is equal to or greater than the second restart temperature, the compressor restarts and operates at the second frequency, and the second frequency is equal to the second temperature-reaching frequency minus the frequency difference value, and the second restart temperature is greater than the set temperature.

[0027] In the embodiments of the present invention, the indoor temperature is the indoor environmental temperature, and the real-time temperature of the indoor environment is the indoor real-time temperature. The air conditioner includes a first temperature sensor and a second temperature sensor. The first temperature sensor is used to obtain the temperature of the outdoor environment, and the second temperature sensor is used to obtain the temperature of the indoor environment. The operating modes of the air conditioner refer to the heating mode and the cooling mode, and the user will control the air conditioner to operate in the heating mode or the cooling mode with a set temperature. When the air conditioner starts and operates in the heating mode or the cooling mode, the air conditioner will obtain the current outdoor environmental temperature and the indoor real-time temperature, and determine the initial operating frequency of the compressor according to the current operating mode and the outdoor environmental temperature, and the compressor will operate at this initial operating frequency. It should be explained that the initial operating frequency can be understood as the optimal operating frequency under the current outdoor environmental temperature and operating mode, so that when the compressor operates at the initial operating frequency, it can not only quickly reach the user's set temperature for the indoor environmental temperature, but also enable the compressor to achieve the best comprehensive performance in terms of efficiency, performance, energy consumption, etc.

[0028] Specifically, referring to Table 1, Table 1 is a comparison table of the outdoor environmental temperature and the compressor operating frequency in the heating mode and the cooling mode. Multiple first temperature ranges and multiple second temperature ranges are preset in the air conditioner. The multiple first temperature ranges respectively correspond to multiple different initial operating frequencies, and the multiple second temperature ranges respectively correspond to multiple different initial operating frequencies. When the air conditioner operates in the heating mode, the air conditioner will judge which first temperature range the outdoor environmental temperature falls into, and then the initial operating frequency corresponding to this first temperature range can be obtained. When the air conditioner operates in the cooling mode, the air conditioner will judge which second temperature range the outdoor environmental temperature falls into, and then the initial operating frequency corresponding to this second temperature range can be obtained. As a preferred embodiment of the present invention, the frequency difference can be 4 Hz.

[0029] Table 1

[0030]

[0031]

[0032] It can be understood that when the user controls the air conditioner to operate in the heating mode or the cooling mode at the set temperature, the air conditioner obtains the outdoor ambient temperature and the indoor real-time temperature. The air conditioner determines the initial operating frequency of the compressor according to the outdoor ambient temperature and the operating mode, and the compressor operates at the initial operating frequency. In the heating mode, the compressor will stop only when the indoor real-time temperature reaches the first shutdown temperature which is greater than the set temperature. This makes it so that the compressor will not trigger shutdown just because the indoor temperature is equal to or slightly higher than the set temperature. Instead, the compressor will stop only when the indoor temperature reaches or exceeds the relatively high first shutdown temperature, avoiding unnecessary shutdown of the compressor due to small fluctuations in the indoor temperature, delaying the shutdown time node of the compressor, and avoiding frequent shutdown of the compressor. After the compressor stops, record the operating frequency before the compressor stops and define this operating frequency as the first temperature-reaching frequency. At this time, the indoor temperature begins to decrease. The compressor will restart only when the indoor real-time temperature reaches the first restart temperature which is less than the set temperature. This makes it so that the compressor will not trigger restart just because the indoor temperature is equal to or slightly less than the set temperature. Instead, the compressor will restart only when the indoor temperature reaches or is less than the relatively low first restart temperature, avoiding unnecessary restart of the compressor due to small fluctuations in the indoor temperature, delaying the restart time node of the compressor, and avoiding frequent restart of the compressor. On the other hand, the first frequency is equal to the first temperature-reaching frequency minus the frequency difference, making the compressor operate at the first frequency which is less than the initial operating frequency after restart. As a result, the rising speed of the indoor temperature slows down and will not quickly reach or exceed the first shutdown temperature, further reducing the probability of frequent start and stop of the compressor in a short period of time.

[0033] In the cooling mode, the compressor will stop only when the indoor real-time temperature reaches the second stop temperature which is lower than the set temperature, so that the compressor will not be triggered to stop just because the indoor temperature is equal to or slightly lower than the set temperature. Instead, the compressor will stop only when the indoor temperature reaches or is lower than the relatively low second stop temperature, avoiding unnecessary stops of the compressor due to small fluctuations in the indoor temperature, delaying the stop time node of the compressor, and preventing the compressor from stopping frequently. After the compressor stops, record the operating frequency before the compressor stops and define this operating frequency as the second temperature-reaching frequency. At this time, the indoor temperature begins to rise. The compressor will restart only when the indoor real-time temperature reaches the second restart temperature which is higher than the set temperature, so that the compressor will not be triggered to restart just because the indoor temperature is equal to or slightly higher than the set temperature. Instead, the compressor will restart only when the indoor temperature reaches or exceeds the relatively high second restart temperature, avoiding unnecessary restarts of the compressor due to small fluctuations in the indoor temperature, delaying the restart time node of the compressor, and preventing the compressor from restarting frequently. On the other hand, the second frequency is equal to the second temperature-reaching frequency minus the frequency difference, so that the compressor runs at a second frequency less than the initial operating frequency after restarting, thereby slowing down the rate at which the indoor temperature drops and preventing it from quickly reaching or being lower than the second stop temperature, further reducing the probability of frequent start-stop of the compressor in a short period of time.

[0034] It can be seen from this that in the heating mode, the first stop temperature is greater than the preset temperature, delaying the stop time node of the compressor; the first restart temperature is less than the preset temperature, delaying the restart time node of the compressor; and the compressor runs at a first frequency less than the initial operating frequency after restarting, slowing down the rate at which the indoor temperature rises to the first stop temperature, further lengthening the time interval between the stop time node and the restart time node of the compressor, resulting in fewer start-stop times of the compressor per unit time, thereby avoiding frequent start-stop of the compressor and being beneficial to ensuring the reliability and safety of the air conditioner. In the cooling mode, the second stop temperature is less than the preset temperature, delaying the stop time node of the compressor; the second restart temperature is greater than the preset temperature, delaying the restart time node of the compressor; and the compressor runs at a second frequency less than the initial operating frequency after restarting, slowing down the rate at which the indoor temperature drops to the second stop temperature, further lengthening the time interval between the stop time node and the restart time node of the compressor, resulting in fewer start-stop times of the compressor per unit time, thereby avoiding frequent start-stop of the compressor and being beneficial to ensuring the reliability and safety of the air conditioner.

[0035] In an embodiment of the present invention, the first frequency = the first temperature - reaching frequency - the frequency difference, and the second frequency = the second temperature - reaching frequency - the frequency difference. The air conditioner is also preset with a first temperature value, a second temperature value, and a first frequency value. The sum of the first temperature value and the set temperature is equal to the first shutdown temperature, and the set temperature minus the second temperature value is equal to the first restart temperature. The initial operating frequency minus the first frequency value is equal to the first frequency, that is, the first shutdown temperature = the set temperature + the first temperature value, the first restart temperature = the set temperature - the second temperature value, and the first frequency = the initial operating frequency - the first frequency value. As a preferred embodiment of the present invention, the first temperature value can be 2°C, and the second temperature value can be 1°C, that is, the first shutdown temperature = the set temperature + 2°C, and the first restart temperature = the set temperature - 1°C.

[0036] Reference Figure 1 , a first time threshold is preset in the air conditioner; when the air conditioner operates in the heating mode, when the indoor real - time temperature is equal to or less than the first restart temperature, the compressor restarts and operates at the first frequency, and the first real - time operating time of the compressor is obtained. It is judged whether the indoor real - time temperature meets the first condition, where the first condition is that the indoor real - time temperature is equal to or greater than the first shutdown temperature. If the indoor real - time temperature meets the first condition, the compressor shuts down; if the indoor real - time temperature does not meet the first condition, it is judged whether the first real - time operating time and the indoor real - time temperature meet the second condition, where the second condition is that the first real - time operating time is greater than the first time threshold and the indoor real - time temperature is less than the set temperature. If the first real - time operating time and the indoor real - time temperature do not meet the second condition, it is continued to judge whether the indoor real - time temperature meets the first condition. If the first real - time operating time and the indoor real - time temperature meet the second condition, the current operating frequency of the compressor is recorded and defined as the first current frequency, the operating frequency of the compressor is increased from the first current frequency to the first efficiency - increasing frequency, and the compressor operates at the first efficiency - increasing frequency. At the same time, the first real - time operating time is cleared and the first real - time operating time is obtained again, and it is continued to judge whether the indoor real - time temperature meets the first condition, where the first efficiency - increasing frequency is equal to the sum of the first current frequency and the frequency difference.

[0037] In an embodiment of the present invention, the first condition is that the indoor real - time temperature ≥ the first shutdown temperature, the second condition is that the first real - time operating time > the first time threshold and the indoor real - time temperature < the set temperature, and the first efficiency - increasing frequency = the first current frequency + the frequency difference. It should be explained that the first real - time operating time is the operating time of the compressor after restarting or frequency - increasing in the heating mode, and each time the compressor restarts or frequency - increases, the first real - time operating time is recorded again. The first current frequency is the operating frequency of the compressor before frequency - increasing. As a preferred embodiment of the present invention, the first time threshold can be 15 min.

[0038] It is understandable that when the user controls the air conditioner to operate in the heating mode at a set temperature, the air conditioner obtains the outdoor ambient temperature and the indoor real-time temperature. The air conditioner determines the initial operating frequency of the compressor according to the outdoor ambient temperature and the current operating mode, so that the compressor operates at the initial frequency. After the compressor operates for a period of time, the temperature of the indoor environment will rise. When the indoor real-time temperature is equal to or greater than the first shutdown temperature, the compressor shuts down, and the first temperature-reaching frequency before the compressor shuts down is recorded. During the process when the compressor is in the shutdown state, the temperature of the indoor environment will gradually decrease. When the temperature of the indoor environment is equal to or less than the first restart temperature, the compressor restarts and operates at the first frequency (the first frequency = the first temperature-reaching frequency - the frequency difference). At this time, it is judged whether the indoor real-time temperature meets the first condition (the indoor real-time temperature ≥ the first shutdown temperature). If the indoor real-time temperature meets the first condition, it means that the indoor temperature has reached or exceeded the first shutdown temperature at this time, and the compressor shuts down at this time.

[0039] If the indoor real-time temperature does not meet the first condition, it means that the indoor temperature has not reached the first shutdown temperature at this time. Then it is judged whether the indoor real-time temperature and the first real-time operating time of the compressor meet the second condition (the first real-time operating time > the first time threshold and the indoor real-time temperature < the set temperature). If the first real-time operating time and the indoor real-time temperature do not meet the second condition, the compressor continues to operate at the first frequency, and it continues to be judged whether the indoor real-time temperature meets the first condition. If the first real-time operating time and the indoor real-time temperature meet the second condition, it means that the operating time after the compressor restarts has exceeded the first time threshold at this time, and the indoor temperature has not reached or exceeded the set temperature, which means that the heating capacity of the air conditioner at this time is not enough to make the indoor temperature continue to rise, or it means that the heating efficiency of the air conditioner is relatively low at this time. Therefore, it is necessary to increase the operating frequency of the compressor so that the air conditioner has enough heating capacity to quickly raise the indoor temperature.

[0040] Therefore, when the first real-time operating time and the indoor real-time temperature meet the second condition, record the current operating frequency of the compressor and define this frequency as the first current frequency. Increase the operating frequency of the compressor from the first current frequency to the first efficiency-increasing frequency (the first efficiency-increasing frequency = the first current frequency + the frequency difference), and the compressor operates at the first efficiency-increasing frequency. At the same time, clear the first real-time operating time and re-obtain the first real-time operating time, and continue to judge whether the indoor real-time temperature meets the first condition. After the compressor operates at the first efficiency-increasing frequency, if the indoor real-time temperature meets the first condition, the compressor shuts down. If the indoor real-time temperature does not meet the first condition, and the first real-time operating time and the indoor real-time temperature also meet the second condition, it is necessary to continue to increase the operating frequency of the compressor at this time, which will not be elaborated further here.

[0041] It can be understood that if the first real-time operation time after the compressor restarts exceeds the first time threshold, and the indoor temperature cannot reach the set temperature when the compressor operates at the first frequency, it may mean that the air conditioner system encounters some abnormal situations, such as a decrease in the outdoor ambient temperature, an increase in the indoor heat load, etc. At this time, if the compressor continues to operate at the lower first frequency, the user may feel that the room is not warm and comfortable enough. Therefore, in the heating mode, if the first real-time operation time of the compressor exceeds the first time threshold and the indoor temperature has not reached the set temperature, the operation frequency of the compressor is increased so that the indoor temperature can reach the set temperature faster, reducing the discomfort caused by insufficient temperature and improving the user experience.

[0042] In the embodiment of the present invention, in the heating mode, if the first real-time operation time after each restart of the compressor can be less than the first time threshold, the operation frequency of the compressor after each restart will gradually decrease until the indoor temperature can be stabilized between the set temperature and the first shutdown temperature. It can be understood that as the air conditioner continues to operate, the indoor environment gradually reaches a thermal equilibrium state. When approaching the thermal equilibrium, the change rate of the indoor temperature becomes slower, and at this time, the heating power required by the compressor also decreases accordingly. Therefore, the control method of the air conditioner in the embodiment of the present invention can make the operation frequency of the compressor gradually decrease after each restart, which can not only maintain the temperature of the indoor environment but also effectively reduce the energy consumption of the air conditioner.

[0043] In the embodiment of the present invention, a third temperature value, a fourth temperature value, and a second frequency value are preset in the air conditioner. The set temperature minus the third temperature value is equal to the second shutdown temperature, the set temperature plus the fourth temperature value is equal to the second restart temperature, and the initial operation frequency minus the second frequency value is equal to the second frequency, that is, the second shutdown temperature = set temperature - third temperature value, the second restart temperature = set temperature + fourth temperature value, and the second frequency = initial operation frequency - second frequency value. As an embodiment of the present invention, the third temperature value can be 2°C, and the fourth temperature value can be 1°C, that is, the second shutdown temperature = set temperature - 2°C, and the second restart temperature = set temperature + 1°C.

[0044] Reference Figure 2, a second time threshold is preset in the air conditioner; when the air conditioner operates in the cooling mode, when the indoor real-time temperature is equal to or higher than the second restart temperature, the compressor restarts and operates at the second frequency, obtains the second real-time operation time of the compressor, and determines whether the indoor real-time temperature meets the third condition, where the third condition is that the indoor real-time temperature is equal to or lower than the second shutdown temperature. If the indoor real-time temperature meets the third condition, the compressor shuts down; if the indoor real-time temperature does not meet the third condition, it is determined whether the second real-time operation time and the indoor real-time temperature meet the fourth condition, where the fourth condition is that the second real-time operation time is greater than the second time threshold and the indoor real-time temperature is greater than the set temperature. If the second real-time operation time does not meet the fourth condition, it continues to determine whether the indoor real-time temperature meets the third condition. If the second real-time operation time and the indoor real-time temperature meet the fourth condition, record the current operation frequency of the compressor and define this frequency as the second current frequency, raise the operation frequency of the compressor from the second current frequency to the second enhanced frequency, and the compressor operates at the second enhanced frequency. At the same time, clear the second real-time operation time and re-obtain the second real-time operation time, and continue to determine whether the indoor real-time temperature meets the third condition, where the second enhanced frequency is equal to the sum of the second current frequency and the frequency difference.

[0045] In the embodiment of the present invention, the third condition is that the indoor real-time temperature ≤ the second shutdown temperature, the fourth condition is that the second real-time operation time > the second time threshold and the indoor real-time temperature > the set temperature, and the second enhanced frequency = the second current frequency + the frequency difference. It should be explained that the second real-time operation time is the operation time of the compressor after restarting or frequency increasing in the cooling mode, and each time the compressor restarts or frequency increases, the second real-time operation time is re-recorded. The second current frequency is the operation frequency of the compressor before frequency increasing. As a preferred embodiment of the present invention, the second time threshold can be 15 min.

[0046] It can be understood that when the user controls the air conditioner to operate in the cooling mode at the set temperature, the air conditioner obtains the outdoor ambient temperature and the indoor real-time temperature, and the air conditioner determines the initial operation frequency of the compressor according to the outdoor ambient temperature and the current operation mode, so that the compressor operates at the initial frequency. After the compressor operates for a period of time, the temperature of the indoor environment will decrease. When the indoor real-time temperature is equal to or lower than the second shutdown temperature, the compressor shuts down, records the operation frequency before the compressor shuts down and defines this operation frequency as the second temperature-reached frequency. During the process of the compressor being in the shutdown state, the temperature of the indoor environment will gradually increase. When the temperature of the indoor environment is equal to or higher than the second restart temperature, the compressor restarts and operates at the second frequency (the second frequency = the second temperature-reached frequency - the frequency difference). At this time, it is determined whether the indoor real-time temperature meets the third condition (the indoor real-time temperature ≤ the second shutdown temperature). If the indoor real-time temperature meets the third condition, it means that the indoor temperature has reached or is lower than the second shutdown temperature at this time, and the compressor shuts down at this time.

[0047] If the indoor real-time temperature does not meet the third condition, it means that the indoor temperature has not reached the second shutdown temperature at this time. Then, it is judged whether the indoor real-time temperature and the second real-time operation time of the compressor meet the fourth condition (the second real-time operation time > the second time threshold and the indoor real-time temperature > the set temperature). If the second real-time operation time and the indoor real-time temperature do not meet the fourth condition, the compressor continues to operate at the second frequency, and it continues to be judged whether the indoor real-time temperature meets the third condition. If the second real-time operation time meets the fourth condition, it means that the operation time after the compressor restarts has exceeded the second time threshold at this time, and the indoor temperature has not reached or is lower than the set temperature, which means that the cooling capacity of the air conditioner is not enough to continue to lower the indoor temperature at this time, or it means that the cooling efficiency of the air conditioner is relatively low at this time. Therefore, it is necessary to increase the operation frequency of the compressor so that the air conditioner has enough cooling capacity to quickly lower the indoor temperature.

[0048] Therefore, when the second real-time operation time meets the fourth condition, record the current operation frequency of the compressor and define this frequency as the second current frequency. Increase the operation frequency of the compressor from the second current frequency to the second efficiency-increasing frequency (the second efficiency-increasing frequency = the second current frequency + the frequency difference), and the compressor operates at the second efficiency-increasing frequency. At the same time, clear the second real-time operation time and obtain the second real-time operation time again, and continue to judge whether the indoor real-time temperature meets the third condition. After the compressor operates at the second efficiency-increasing frequency, if the indoor real-time temperature meets the third condition, the compressor shuts down. If the indoor real-time temperature does not meet the third condition, and the second real-time operation time and the indoor real-time temperature also meet the fourth condition, it is necessary to continue to increase the operation frequency of the compressor at this time, which will not be elaborated further here.

[0049] Similarly, in the cooling mode, appropriately increase the operation frequency of the compressor to quickly lower the indoor temperature to the set temperature as soon as possible, improving the user experience, which will not be elaborated further here.

[0050] The present invention also provides an air conditioner, which includes a control device. The control device includes a processor and a memory. The processor is connected to the memory. The memory stores a control program. The processor is configured to call and execute the control program stored in the memory. The control program is used to execute the control method of the air conditioner. The processor can be implemented in the form of a general-purpose central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or one or more integrated circuits, etc., and is used to execute the control program to implement the technical solutions provided in the embodiments of the present application. The memory can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory 802 (RAM), etc. The memory can store an operating system and other application programs. When implementing the technical solutions provided in the embodiments of the present specification through software or firmware, the relevant program codes are stored in the memory and are called by the processor to execute the control method of the air conditioner in the embodiments of the present application.

[0051] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0052] Certainly, the present invention is not limited to the above-described embodiments. Those skilled in the art can also make equivalent deformations or substitutions without departing from the spirit of the present invention. These equivalent deformations or substitutions are all included within the scope defined by the claims of the present application.

Claims

1. A method for controlling an air conditioner, characterized in that: include: The air conditioner is preset with a frequency difference; The air conditioner is started, an outdoor ambient temperature and a real-time indoor temperature are obtained, an initial operating frequency of a compressor is determined according to the outdoor ambient temperature and an operating mode of the air conditioner, and the compressor operates at the initial operating frequency; When the air conditioner is running in heating mode, when the indoor real-time temperature is equal to or greater than the first shutdown temperature, the compressor is shut down, the operating frequency of the compressor before the shutdown is recorded and defined as the first temperature reaching frequency, wherein the first shutdown temperature is greater than the set temperature, and when the indoor real-time temperature is equal to or less than the first restart temperature, the compressor is restarted and runs at the first frequency, wherein the first frequency is equal to the first temperature reaching frequency minus the frequency difference, and the first restart temperature is less than the set temperature; When the air conditioner operates in cooling mode, when the real-time indoor temperature is equal to or lower than the second shutdown temperature, the compressor shuts down, and the operating frequency before the compressor shuts down is recorded and defined as the second temperature-reaching frequency, wherein the second shutdown temperature is lower than the set temperature; when the real-time indoor temperature is equal to or higher than the second restart temperature, the compressor restarts and operates at the second frequency, wherein the second frequency is equal to the second temperature-reaching frequency minus the frequency difference, and the second restart temperature is higher than the set temperature.

2. The control method according to claim 1, characterized in that: Preset the first time threshold; When the air conditioner is running in a heating mode, when the indoor real-time temperature is equal to or lower than the first restart temperature, the compressor is restarted and runs at the first frequency, a first real-time running time of the compressor is obtained, and it is determined whether the indoor real-time temperature meets a first condition, wherein the first condition is that the indoor real-time temperature is equal to or higher than the first shutdown temperature, and if the indoor real-time temperature meets the first condition, the compressor is shut down; If the indoor real-time temperature does not meet the first condition, determine whether the first real-time operating time and the indoor real-time temperature meet the second condition, wherein the second condition is that the first real-time operating time is greater than the first time threshold and the indoor real-time temperature is less than the set temperature. If the first real-time operating time and the indoor real-time temperature do not meet the second condition, continue to determine whether the indoor real-time temperature meets the first condition.

3. The control method according to claim 2, characterized in that: If the first real-time operating time and the indoor real-time temperature meet the second condition, record the current operating frequency of the compressor and define the frequency as the first current frequency, increase the operating frequency of the compressor from the first current frequency to the first efficiency-enhancing frequency, and operate the compressor at the first efficiency-enhancing frequency. At the same time, clear the first real-time operating time and reacquire the first real-time operating time, and continue to judge whether the indoor real-time temperature meets the first condition, wherein the first efficiency-enhancing frequency is equal to the sum of the first current frequency and the frequency difference.

4. The control method according to claim 1, characterized in that: Presetting a second time threshold; When the air conditioner is running in cooling mode, when the indoor real-time temperature is equal to or greater than the second restart temperature, the compressor is restarted and runs at the second frequency, the second real-time running time of the compressor is obtained, and it is determined whether the indoor real-time temperature meets a third condition, wherein the third condition is that the indoor real-time temperature is equal to or less than the second shutdown temperature, and if the indoor real-time temperature meets the third condition, the compressor is shut down; If the indoor real-time temperature does not meet the third condition, determine whether the second real-time operating time and the indoor real-time temperature meet the fourth condition, wherein the fourth condition is that the second real-time operating time is greater than the second time threshold and the indoor real-time temperature is greater than the set temperature. If the second real-time operating time does not meet the fourth condition, continue to determine whether the indoor real-time temperature meets the third condition.

5. The control method according to claim 4, characterized in that: If the second real-time operating time and the indoor real-time temperature meet the fourth condition, record the current operating frequency of the compressor and define the frequency as the second current frequency, increase the operating frequency of the compressor from the second current frequency to the second efficiency-enhancing frequency, and operate the compressor at the second efficiency-enhancing frequency. At the same time, clear the second real-time operating time and reacquire the second real-time operating time, and continue to judge whether the indoor real-time temperature meets the third condition, wherein the second efficiency-enhancing frequency is equal to the sum of the second current frequency and the frequency difference.

6. The control method according to claim 1, characterized in that: A first temperature value and a second temperature value are preset, the first temperature value plus the set temperature equals the first shutdown temperature, and the set temperature minus the second temperature value equals the first restart temperature.

7. The control method according to claim 1, characterized in that: A first frequency value is preset, and the initial operating frequency minus the first frequency value equals the first frequency.

8. The control method according to claim 1, characterized in that: A third temperature value and a fourth temperature value are preset, the set temperature minus the third temperature value equals the second shutdown temperature, and the set temperature plus the fourth temperature value equals the second restart temperature.

9. The control method according to claim 1, characterized in that: A second frequency value is preset, and the initial operating frequency minus the second frequency value equals the second frequency.

10. An air conditioner, characterized in that: The invention comprises a control device, wherein the control device comprises a processor and a memory, wherein the processor is connected to the memory, wherein a control program is stored in the memory, and wherein the processor is used for calling and executing the control program stored in the memory, wherein the control program is used for executing the control method of the air conditioner as described in any one of claims 1 to 9.

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