Control method of air conditioner, air conditioner, and storage medium

Abstract

The application discloses a control method of an air conditioner, the air conditioner and a storage medium. The air conditioner comprises a heat exchanger, a bottom plate arranged at the bottom of the heat exchanger and a fan arranged corresponding to the heat exchanger, and the bottom plate is used for collecting and discharging condensate water generated by the heat exchanger. The method comprises the following steps: controlling the air conditioner to run defrosting to defrost the heat exchanger; and when the air conditioner ends the defrosting operation, controlling the fan to run at a first steering direction to form a positive pressure state above the bottom plate, wherein the fan blows air towards the heat exchanger when running at the first steering direction. The application aims to improve the drainage capacity of the bottom plate after the air conditioner finishes defrosting, avoid water icing on the bottom plate and ensure normal use of the air conditioner.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more particularly to a control method for an air conditioner, an air conditioner, and a storage medium. Background Technology

[0002] When an air conditioner operates in extreme environments, the heat exchanger is prone to frost formation. The air conditioner needs to defrost, which involves switching the heat exchanger to condensation mode. The heat released by the refrigerant condensation melts the frost on its surface, and the resulting condensate is collected by the chassis at the bottom of the heat exchanger and drained away by gravity.

[0003] Currently, when an air conditioner resumes normal operation after defrosting, the fan corresponding to the defrosted heat exchanger will immediately turn on at its maximum speed. When the fan turns on, it drives the airflow from the heat exchanger to the outside, allowing the energy of the heat exchanger to be released to the outside quickly. Under the driving action of the fan, it is easy to cause poor drainage of the chassis, resulting in water accumulation or even ice formation on the chassis, which affects the normal use of the air conditioner. Summary of the Invention

[0004] The main objective of this invention is to provide a control method for an air conditioner, an air conditioner, and a storage medium, which aims to improve the drainage capacity of the air conditioner chassis after defrosting, prevent water accumulation and freezing on the chassis, and ensure the normal operation of the air conditioner.

[0005] To achieve the above objectives, the present invention provides a control method for an air conditioner, the air conditioner including a heat exchanger, a chassis disposed at the bottom of the heat exchanger, and a fan disposed corresponding to the heat exchanger, the chassis being used to collect and drain condensate generated by the heat exchanger, and the control method for the air conditioner including the following steps:

[0006] Control the defrosting operation of the air conditioner to defrost the heat exchanger;

[0007] When the air conditioner finishes defrosting, it controls the fan to run in a first direction to create a positive pressure above the chassis; wherein, when the fan runs in the first direction, it blows air toward the heat exchanger.

[0008] Optionally, the step of controlling the fan to operate in a first direction when the air conditioner finishes defrosting includes:

[0009] When the air conditioner finishes defrosting, the operating frequency of the air conditioner's compressor and the low-pressure of the air conditioner are obtained;

[0010] The target rotational speed of the fan is determined based on the operating frequency and the low-pressure.

[0011] The fan is controlled to operate in the first direction according to the target rotation speed.

[0012] Optionally, the step of determining the target operating speed of the fan based on the operating frequency and the low-pressure includes:

[0013] Determine the pressure difference between the low pressure and the target pressure;

[0014] The target rotational speed is determined based on the operating frequency and the pressure difference value.

[0015] Optionally, the step of determining the target rotational speed based on the operating frequency and the pressure difference value includes:

[0016] Determine the frequency range in which the operating frequency is located, and determine the numerical range in which the differential pressure value is located;

[0017] The preset rotational speed corresponding to the frequency range and the numerical range is taken as the target rotational speed.

[0018] Optionally, before the step of determining the pressure difference between the low-pressure and the target pressure, the method further includes:

[0019] The target pressure is determined based on the operating frequency.

[0020] Optionally, after the step of controlling the fan to operate in a first direction when the air conditioner finishes defrosting, the method further includes:

[0021] Obtain the current air pressure value above the chassis;

[0022] The current speed of the fan is adjusted according to the air pressure value.

[0023] Optionally, the step of adjusting the current speed of the fan according to the air pressure value includes:

[0024] Determine the pressure difference between the pressure value and the target positive pressure value;

[0025] The speed adjustment value is determined based on the air pressure difference value;

[0026] The current speed of the fan is adjusted according to the speed adjustment value.

[0027] Optionally, after the step of controlling the fan to operate in a first direction when the air conditioner finishes defrosting, the method further includes:

[0028] Control the fan to stop operating for a preset time.

[0029] The fan is controlled to operate in a second direction and the heat exchange operation of the air conditioner is controlled, wherein the first direction is opposite to the second direction.

[0030] In addition, to achieve the above objectives, this application also proposes an air conditioner, the air conditioner comprising: a memory, a processor, and an air conditioner control program stored in the memory and executable on the processor, wherein when the air conditioner control program is executed by the processor, it implements the steps of the air conditioner control method as described in any of the preceding claims.

[0031] In addition, to achieve the above objectives, this application also proposes a storage medium storing a control program for an air conditioner, which, when executed by a processor, implements the steps of the control method for the air conditioner as described in any of the preceding claims.

[0032] This invention proposes a control method for an air conditioner, based on an air conditioner including a heat exchanger and a chassis at the bottom of the heat exchanger for collecting and draining condensate. After the defrosting operation of the air conditioner to the heat exchanger is completed, the fan corresponding to the heat exchanger is controlled to run in a first direction to blow air towards the heat exchanger. This helps to create a positive pressure state above the chassis. Under positive pressure, the condensate collected in the chassis can be pushed to flow quickly to the outside of the chassis. Compared with controlling the fan to drive the air to blow outward at maximum speed, this method can effectively improve the drainage speed of the chassis, thereby improving the drainage capacity of the chassis after the air conditioner defrosts, preventing water accumulation and ice formation on the chassis, and ensuring the normal use of the air conditioner. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the hardware structure involved in the operation of an embodiment of the air conditioner of the present invention;

[0034] Figure 2 This is a flowchart illustrating an embodiment of the control method for an air conditioner according to the present invention;

[0035] Figure 3 This is a flowchart illustrating another embodiment of the control method for an air conditioner according to the present invention;

[0036] Figure 4 This is a flowchart illustrating another embodiment of the control method for an air conditioner according to the present invention;

[0037] Figure 5 This is a flowchart illustrating another embodiment of the control method for the air conditioner of the present invention.

[0038] 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

[0039] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0040] The main solution of this invention is: controlling the air conditioner to defrost the heat exchanger; when the air conditioner finishes defrosting, controlling the fan to run in a first direction to create a positive pressure state above the chassis; wherein, the fan blows air toward the heat exchanger when running in the first direction.

[0041] In the existing technology, when the air conditioner resumes normal operation after defrosting, the fan corresponding to the defrosted heat exchanger will immediately turn on at its maximum speed. When the fan turns on, it drives the airflow from the heat exchanger to the outside, so that the energy of the heat exchanger can be quickly released to the outside. Under the driving action of the fan, it is easy to cause poor drainage of the chassis, resulting in water accumulation or even ice formation on the chassis, which affects the normal use of the air conditioner.

[0042] The present invention provides the above-mentioned solution, which aims to improve the drainage capacity of the air conditioner chassis after defrosting, prevent water accumulation and freezing in the chassis, and ensure the normal use of the air conditioner.

[0043] This invention provides an air conditioner. The air conditioner can be any type of air conditioner, such as a split-type air conditioner, an integrated air conditioner, a multi-split air conditioner, or a portable air conditioner.

[0044] In this embodiment, refer to Figure 1 The air conditioner includes a refrigerant circulation system and a control device 100. The refrigerant circulation system includes a compressor 1, a first heat exchanger, a throttling device 2, and a second heat exchanger. A first fan 3 is correspondingly provided for the first heat exchanger, and the first fan 3 can be used to drive air to exchange heat with the first heat exchanger. A second fan 4 is correspondingly provided for the second heat exchanger, and the second fan 4 can be used to drive air to exchange heat with the second heat exchanger.

[0045] In this embodiment, the first heat exchanger is an outdoor heat exchanger, and the second heat exchanger is an indoor heat exchanger. In other embodiments, both the first and second heat exchangers can be located indoors.

[0046] When the air conditioner is in cooling mode, the refrigerant discharged from compressor 1 flows sequentially through the first heat exchanger, the throttling device 2, and the second heat exchanger before returning to compressor 1. The first heat exchanger is in a condensing state, and the second heat exchanger is in an evaporating state. When the air conditioner is in heating mode, the refrigerant discharged from compressor 1 flows sequentially through the second heat exchanger, the throttling device 2, and the second heat exchanger before returning to compressor 1. The first heat exchanger is in an evaporating state, and the second heat exchanger is in a condensing state. During defrosting operation, the air conditioner can operate in either heating or cooling mode. When the first heat exchanger is frosted, the air conditioner can operate in heating mode to defrost it; when the second heat exchanger is frosted, the air conditioner can operate in cooling mode to defrost it.

[0047] Furthermore, refer to Figure 1The air conditioner also includes a pressure sensor 5 connected to the control device 100, which can acquire data detected by the pressure sensor 5. The pressure sensor 5 can be located on the low-pressure side of the refrigerant circulation loop, such as the return gas side of the compressor 1 or in the heat exchanger where the refrigerant circulation loop is in an evaporating state, to detect the low-pressure side of the air conditioner.

[0048] In this embodiment of the invention, reference is made to Figure 1 The control unit of the air conditioner includes a processor 1001 (e.g., CPU), a memory 1002, a timer 1003, etc. The components in the control unit are connected via a communication bus. The memory 1002 can be a high-speed RAM or a stable, non-volatile memory, such as a disk drive. Optionally, the memory 1002 can also be a storage device independent of the aforementioned processor 1001.

[0049] Those skilled in the art will understand that Figure 1 The device structure shown does not constitute a limitation on the device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0050] like Figure 1 As shown, the memory 1002, which serves as a storage medium, may include a control program for an air conditioner. Figure 1 In the device shown, the processor 1001 can be used to call the control program of the air conditioner stored in the memory 1002 and execute the relevant steps of the control method of the air conditioner in the following embodiments.

[0051] This invention also provides a control method for an air conditioner, applied to the aforementioned air conditioner.

[0052] Reference Figure 2 This application proposes an embodiment of a control method for an air conditioner. In this embodiment, the control method for the air conditioner includes:

[0053] Step S10: Control the defrosting operation of the air conditioner to defrost the heat exchanger;

[0054] The heat exchanger here refers to the frosted heat exchanger in the air conditioner. When the air conditioner operates in defrost mode, its goal is to melt the frost on the heat exchanger. The air conditioner can operate in either cooling or heating mode during defrost mode, as long as the temperature of the frosted heat exchanger can be raised. In this embodiment, the heat exchanger is in a condensed state when the air conditioner operates in defrost mode.

[0055] When the defrosting operation of the air conditioner reaches the termination condition, the defrosting operation can be stopped by controlling the air conditioner. For example, the defrosting operation lasts for a preset duration, or the temperature of the heat exchanger is higher than the preset temperature.

[0056] Step S20: When the air conditioner finishes defrosting, the fan is controlled to run in a first direction to create a positive pressure state above the chassis; wherein, when the fan runs in the first direction, it blows air toward the heat exchanger.

[0057] The fan is the one corresponding to the aforementioned heat exchanger. Specifically, the compressor stops running when the air conditioner finishes defrosting. If the duration of the defrosting cycle is less than or equal to a preset duration, the fan is controlled to maintain operation in the first rotation direction. When the fan is running in the first rotation direction, it can operate at a preset fixed speed, or it can operate according to the current operating parameters of the air conditioner.

[0058] It should be noted that the compressor remains off when the fan is running in the first rotation direction.

[0059] During the defrosting process of the air conditioner, the condensate formed by the melting of frost on the heat exchanger drips into the chassis under gravity. The chassis collects the condensate dripping from the heat exchanger and has a drain outlet. The condensate in the chassis drains away from the drain outlet under gravity. When the fan is running in the first rotation direction, the positive pressure formed above the chassis increases the downward force on the condensate in the vertical direction, allowing the condensate to increase its air pressure on top of gravity and be quickly discharged from the drain outlet.

[0060] This invention proposes a control method for an air conditioner, based on an air conditioner including a heat exchanger and a chassis at the bottom of the heat exchanger for collecting and draining condensate. After the defrosting operation of the air conditioner to the heat exchanger is completed, the fan corresponding to the heat exchanger is controlled to run in a first direction to blow air towards the heat exchanger. This helps to create a positive pressure state above the chassis. Under positive pressure, the condensate collected in the chassis can be pushed to flow quickly to the outside of the chassis. Compared with controlling the fan to drive the air to blow outward at maximum speed, this method can effectively improve the drainage speed of the chassis, thereby improving the drainage capacity of the chassis after the air conditioner defrosts, preventing water accumulation and ice formation on the chassis, and ensuring the normal use of the air conditioner.

[0061] Furthermore, based on the above embodiments, another embodiment of the control method for the air conditioner of this application is proposed. In this embodiment, reference is made to... Figure 3 Step S20 includes:

[0062] Step S21: When the air conditioner finishes defrosting, obtain the operating frequency of the air conditioner's compressor and the low-pressure of the air conditioner;

[0063] Low-pressure specifically includes the return air pressure of the air conditioner or the pressure of the heat exchanger in the evaporation state during the defrosting operation of the air conditioner.

[0064] Step S22: Determine the target rotational speed of the fan based on the operating frequency and the low-pressure.

[0065] Different operating frequencies and different low-pressure levels correspond to different target rotational speeds. In this embodiment, the target rotational speed is positively correlated with the operating frequency and negatively correlated with the low-pressure level. The correspondence between operating frequency, low-pressure level, and target rotational speed can be preset, such as through a mapping table or calculation formula. Based on this correspondence, the rotational speed corresponding to the current operating frequency and low-pressure level can be determined as the target rotational speed.

[0066] In this embodiment, step S22 includes: determining the pressure difference between the low-pressure and the target pressure, and determining the target rotational speed based on the operating frequency and the pressure difference. Different pressure difference values ​​and different operating frequencies correspond to different target rotational speeds. Specifically, a correspondence between the pressure difference, operating frequency, and target rotational speed can be established in advance. This correspondence can be in the form of a mapping table, calculation formula, etc. Based on this correspondence, the rotational speed corresponding to the current operating frequency and pressure difference value can be determined as the target rotational speed.

[0067] Specifically, multiple numerical intervals and multiple frequency intervals corresponding to the differential pressure value can be pre-divided, with different numerical intervals and different frequency intervals corresponding to different preset rotational speeds. Based on this, the frequency interval in which the operating frequency is located is determined, and the numerical interval in which the differential pressure value is located is determined; the preset rotational speeds corresponding to the frequency intervals and the numerical intervals are used as the target rotational speeds.

[0068] For example, the following mapping table can be pre-established:

[0069]

[0070] Where Fr represents the operating frequency, Pr represents the preset speed, and ΔP represents the pressure difference value.

[0071] By querying the above mapping table using the operating frequency and differential pressure value, the frequency range and the numerical range of the differential pressure value in the mapping table are determined. The preset speed mapped by the determined frequency range and numerical range is then used as the target speed.

[0072] Furthermore, in this embodiment, the target pressure is determined based on the operating frequency, with different operating frequencies corresponding to different target pressures, thereby improving the reliability of compressor operation. In other embodiments, the target pressure may also be a pre-set fixed value, or it may be a value determined based on other parameters, such as the current air pressure above the chassis, and so on.

[0073] In other embodiments, the ratio between the low-pressure and the target pressure can be determined, and the target rotational speed can be determined based on this ratio and the operating frequency. Alternatively, the target rotational speed can be obtained directly by looking up a table using the low-pressure and operating frequency.

[0074] Step S23: Control the fan to run in the first direction according to the target rotation speed.

[0075] In this embodiment, the combination of low-pressure and operating frequency accurately reflects the actual demand of the air conditioner's low-pressure state on the fan's heat exchange capacity. Based on this, determining the corresponding target speed by combining low-pressure and operating frequency to control the fan to operate in the first direction is beneficial for improving the accuracy of fan speed control. It also helps to achieve a positive pressure state to improve the chassis drainage capacity while improving the fan's operating efficiency, avoiding unnecessary high-speed operation of the fan and wasting energy. Furthermore, determining the target fan speed by combining the pressure difference between the low-pressure and target pressure with the operating frequency ensures that the air conditioner's low-pressure can reach the target pressure under fan speed regulation, thereby guaranteeing that the air conditioner resumes normal heat exchange operation and improving the system's heat exchange efficiency.

[0076] Furthermore, based on any of the above embodiments, another embodiment of the control method for the air conditioner of this application is proposed. In this embodiment, reference is made to... Figure 4 After step S20, the method further includes:

[0077] Step S30: Obtain the current air pressure value above the chassis;

[0078] The air pressure value can be detected by an air pressure sensor located on the heat exchanger or on the top edge of the chassis.

[0079] Step S40: Adjust the current speed of the fan according to the air pressure value.

[0080] When step S20 includes steps S21 to S23 as described above, the current rotational speed can be the target rotational speed as described above.

[0081] Different air pressure values ​​correspond to different speed adjustment values, and the current speed of the fan can be determined based on the speed adjustment value corresponding to the air pressure value. Alternatively, different air pressure values ​​can correspond to different operating speed values, and the operating speed value corresponding to the air pressure value can be used as the adjusted fan speed.

[0082] In this embodiment, the pressure difference between the air pressure value and the target positive pressure value is determined; a speed adjustment value is determined based on the pressure difference; and the current speed of the fan is adjusted based on the speed adjustment value. The target positive pressure value is the target value that the air pressure above the chassis needs to reach. Different pressure differences correspond to different speed adjustment values, which can be obtained by looking up a table or by calculation based on the pressure difference. The speed adjustment value is a parameter used to increase or decrease the current speed of the fan. The pressure difference can be positive or negative. When the pressure difference is less than 0, the speed adjustment value is a parameter used to increase the current speed of the fan. The speed adjustment value is negatively correlated with the pressure difference, meaning that the smaller the pressure difference, the greater the adjustment range of the current speed of the fan. When the pressure difference is greater than 0, the speed adjustment value is a parameter used to decrease the current speed of the fan. The speed adjustment value is positively correlated with the pressure difference, meaning that the larger the pressure difference, the greater the decrease in the current speed of the fan.

[0083] In this embodiment, adjusting the fan speed based on the air pressure above the chassis helps ensure a positive pressure state above the chassis, thereby further improving the chassis's drainage capacity. In particular, adjusting the fan speed based on the pressure difference between the current air pressure value and the target positive pressure value helps ensure that the target positive pressure value is reached above the chassis, preventing the air pressure from being too high or too low, thus improving both the chassis's drainage capacity and the fan's operating efficiency.

[0084] Furthermore, based on any of the above embodiments, another embodiment of the control method for the air conditioner of this application is proposed. In this embodiment, reference is made to... Figure 5 After step S20, the method further includes:

[0085] Step S50: When the duration of the fan running in the first direction reaches a first preset duration, control the fan to stop running for a second preset duration.

[0086] The first and second preset durations here can be fixed durations set in advance, or durations determined according to the actual operating conditions of the air conditioner.

[0087] In this embodiment, the initial temperature of the heat exchanger at the end of the air conditioner's defrosting operation can be obtained, and a first preset duration can be determined based on this initial temperature. The fan directing air towards the heat exchanger not only creates a positive pressure environment but also accelerates the dripping of remaining condensate from the heat exchanger to the chassis. The initial temperature accurately reflects the remaining condensate on the heat exchanger. Determining the first preset duration based on the initial temperature helps improve the chassis's drainage capacity while preventing condensate from accumulating on the heat exchanger, thereby further improving the defrosting effect.

[0088] In this embodiment, the operating current of the fan can be obtained when the duration of the fan running in the first direction reaches a first preset duration, and the second preset duration is determined based on the operating current. The second preset duration is positively correlated with the operating current.

[0089] Step S60: Control the fan to run in a second direction and control the air conditioner to run in heat exchange mode, wherein the first direction is opposite to the second direction.

[0090] The heat exchange operation is specifically designed to regulate the ambient temperature and humidity.

[0091] In this embodiment, after the fan operates in the first direction, it is shut down for a period of time before switching to the second direction to meet the needs of normal heat exchange operation. This avoids unstable operation caused by instantaneous switching of the fan's state, which helps protect the fan and improve its service life.

[0092] To better understand the solutions mentioned in the embodiments of this application, a specific example is used below to illustrate the solutions of this application:

[0093] During the first n minutes after the air conditioner finishes defrosting, the compressor stops running. Every s seconds, the difference ΔP between the actual low-pressure P and the target low-pressure P0, as well as the actual operating frequency Fr of the compressor, are detected. A preset fan speed table corresponding to ΔP and Fr is called up, and the target fan speed Pr is obtained by looking up ΔP and Fr. The fan runs in reverse at speed Pr, blowing air towards the heat exchanger. A positive pressure state is formed between the heat exchanger and the fan (i.e., above the chassis), accelerating the drainage of condensate from the chassis drain. After n minutes of defrosting, the fan stops running and remains running for s1 seconds. Then, the compressor is further controlled to start at a higher frequency, and the fan runs in the forward direction (the airflow driven by the fan points from the heat exchanger to the outside). The air conditioner resumes normal heat exchange operation.

[0094] Furthermore, this embodiment of the invention also proposes a storage medium storing a control program for an air conditioner. When the control program for the air conditioner is executed by a processor, it implements the relevant steps of any embodiment of the control method for the air conditioner described above.

[0095] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0096] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0097] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0098] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A control method for an air conditioner, characterized in that, The air conditioner includes a heat exchanger, a chassis located at the bottom of the heat exchanger, and a fan corresponding to the heat exchanger. The chassis is used to collect and drain the condensate generated by the heat exchanger. The control method of the air conditioner includes the following steps: Control the defrosting operation of the air conditioner to defrost the heat exchanger; When the air conditioner finishes defrosting, it controls the fan to run in a first direction to create a positive pressure above the chassis; wherein, when the fan runs in the first direction, it blows air toward the heat exchanger. The step of controlling the fan to run in a first direction when the air conditioner finishes defrosting includes: When the air conditioner finishes defrosting, the operating frequency of the air conditioner's compressor and the low-pressure of the air conditioner are obtained; Determine the pressure difference between the low pressure and the target pressure; wherein the target pressure is determined based on the current air pressure above the chassis. The target speed of the fan is determined based on the operating frequency and the pressure difference value; the target speed is positively correlated with the operating frequency and negatively correlated with the low pressure. The fan is controlled to operate in the first direction according to the target rotation speed; After the step of controlling the fan to run in a first direction when the air conditioner finishes defrosting, the method further includes: When the duration of the fan running in the first direction reaches a first preset duration, the fan is controlled to stop running for a second preset duration; wherein, the first preset duration is determined based on the initial temperature of the heat exchanger at the end of the defrosting operation of the air conditioner; The fan is controlled to operate in a second direction and the heat exchange operation of the air conditioner is controlled, wherein the first direction is opposite to the second direction.

2. The control method for an air conditioner as described in claim 1, characterized in that, The step of determining the target rotational speed based on the operating frequency and the pressure difference value includes: Determine the frequency range in which the operating frequency is located, and determine the numerical range in which the differential pressure value is located; The preset rotational speed corresponding to the frequency range and the numerical range is taken as the target rotational speed.

3. The control method for an air conditioner as described in claim 1, characterized in that, After the step of controlling the fan to run in a first direction when the air conditioner finishes defrosting, the method further includes: Obtain the current air pressure value above the chassis; The current speed of the fan is adjusted according to the air pressure value.

4. The control method for an air conditioner as described in claim 3, characterized in that, The step of adjusting the current speed of the fan according to the air pressure value includes: Determine the pressure difference between the stated pressure value and the target positive pressure value; The speed adjustment value is determined based on the air pressure difference value; The current speed of the fan is adjusted according to the speed adjustment value.

5. An air conditioner, characterized in that, The air conditioner includes: a memory, a processor, and a control program for the air conditioner stored in the memory and executable on the processor. When the control program for the air conditioner is executed by the processor, it implements the steps of the control method for the air conditioner as described in any one of claims 1 to 4.

6. A storage medium, characterized in that, The storage medium stores a control program for an air conditioner, which, when executed by a processor, implements the steps of the control method for an air conditioner as described in any one of claims 1 to 4.

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