Fresh air conditioning control method, fresh air conditioner and storage medium

Abstract

The application discloses a control method of a fresh air conditioner, the fresh air conditioner and a storage medium. The method comprises the following steps: controlling the fresh air conditioner to start an energy-saving mode and obtaining an operation state of a fresh air function; obtaining a temperature parameter according to the operation state; and controlling a compressor of the fresh air conditioner to adjust a frequency in a preset low-frequency range according to the temperature parameter. The application aims to improve the energy-saving performance of the fresh air conditioner and the indoor user comfort.

Description

Technical Field

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

[0002] In addition to regulating the temperature of indoor air, fresh air conditioners can also introduce fresh outdoor air into the room.

[0003] Currently, in the energy-saving mode, the compressor of a fresh air conditioner generally operates at a fixed energy-saving frequency. The compressor has a large displacement, and the minimum frequency is generally set at 16-24Hz, which can easily cause high power consumption. Furthermore, when the large displacement compressor operates at a low frequency, its capacity output is still relatively large. When the demand for fresh air changes, it can easily cause fluctuations in indoor temperature, resulting in poor comfort for indoor users. Summary of the Invention

[0004] The main objective of this invention is to provide a control method for a fresh air conditioner, a fresh air conditioner, and a storage medium, with the aim of improving the energy efficiency of the fresh air conditioner and the comfort of indoor users.

[0005] To achieve the above objectives, the present invention provides a control method for a fresh air conditioning unit, the control method comprising the following steps:

[0006] Control the fresh air conditioner to turn on the energy-saving mode and obtain the operating status of the fresh air function;

[0007] The temperature parameters are obtained based on the operating status.

[0008] The compressor of the fresh air conditioner is controlled to adjust its frequency within a preset low-frequency range based on the temperature parameters.

[0009] Optionally, the step of obtaining the temperature parameter based on the operating status includes:

[0010] When the operating status is that the fresh air function is not turned on, the indoor temperature and the set temperature corresponding to the fresh air air conditioner are obtained, and the temperature parameters include the indoor temperature and the set temperature.

[0011] Optionally, the step of controlling the compressor of the fresh air conditioner to adjust its frequency within the preset low-frequency range according to the temperature parameter includes:

[0012] Determine a first temperature difference value between the indoor temperature and the set temperature;

[0013] The first adjustment rate of the compressor is determined based on the first temperature difference value, and the first adjustment rate is positively correlated with the first temperature difference value;

[0014] The compressor frequency is controlled to adjust within the preset low-frequency range according to the first adjustment rate.

[0015] Optionally, the step of obtaining the temperature parameter based on the operating status includes:

[0016] When the operating state is such that the fresh air function is activated after the energy-saving mode is started, the indoor temperature and fresh air temperature corresponding to the fresh air air conditioner are obtained, and the temperature parameters include the indoor temperature and the fresh air temperature.

[0017] Optionally, the step of controlling the compressor of the fresh air conditioner to adjust its frequency within the preset low-frequency range according to the temperature parameter includes:

[0018] Determine a second temperature difference value between the indoor temperature and the fresh air temperature;

[0019] The second adjustment rate of the compressor is determined based on the second temperature difference value, and the second adjustment rate is positively correlated with the second temperature difference value;

[0020] The compressor is controlled to adjust its frequency within the preset low-frequency range according to the second adjustment rate.

[0021] Optionally, the step of determining the second adjustment rate of the compressor based on the second temperature difference value includes:

[0022] The second adjustment rate is determined based on the first target value range in which the second temperature difference value falls.

[0023] Optionally, after the step of controlling the compressor adjustment frequency within the preset low-frequency range according to the second adjustment rate, the method further includes:

[0024] When the operating frequency of the compressor reaches the upper limit of the preset low frequency range, the third temperature difference value between the current indoor temperature and the fresh air temperature of the fresh air conditioner is obtained.

[0025] When the third temperature difference value is within the first target value range, the indoor fan of the fresh air conditioner is controlled to reduce its speed.

[0026] Optionally, the step of controlling the indoor fan of the fresh air conditioner to reduce its speed includes:

[0027] The third adjustment rate of the indoor fan is determined based on the first target value range, and the third adjustment rate is positively correlated with the first target value range.

[0028] The indoor fan speed is reduced according to the third adjustment rate.

[0029] Optionally, after the step of controlling the indoor fan of the fresh air conditioner to reduce its speed, the method further includes:

[0030] When the indoor fan reaches the minimum speed corresponding to the energy-saving mode, the fresh air fan of the fresh air conditioner is controlled to reduce its operating speed.

[0031] Optionally, the step of obtaining the temperature parameter based on the operating status includes:

[0032] When the operating state is that the fresh air function and the energy-saving mode are both turned on, the indoor heat exchanger temperature and the fresh air temperature of the fresh air air conditioner are obtained, and the temperature parameters include the indoor heat exchanger temperature and the fresh air temperature.

[0033] Optionally, the step of controlling the compressor of the fresh air conditioner to adjust its frequency within the preset low-frequency range according to the temperature parameter includes:

[0034] Determine a fourth temperature difference value between the indoor heat exchanger temperature and the fresh air temperature;

[0035] The fourth adjustment rate of the compressor is determined based on the fourth temperature difference value, and the fourth adjustment rate is positively correlated with the fourth temperature difference value;

[0036] The compressor frequency is controlled to adjust according to the fourth adjustment rate within the preset low-frequency range.

[0037] Optionally, the step of determining the fourth adjustment rate of the compressor based on the fourth temperature difference value includes:

[0038] The fourth adjustment rate is determined based on the second target value range in which the fourth temperature difference value is located.

[0039] Optionally, the step of determining the fourth adjustment rate based on the second target numerical range where the fourth temperature difference value is located may, simultaneously or after the execution of the step, further include:

[0040] Obtain the indoor temperature and set temperature corresponding to the fresh air conditioner;

[0041] Determine the fifth temperature difference value between the indoor temperature and the set temperature;

[0042] When the fifth temperature difference value is greater than the preset threshold, the step of controlling the compressor frequency adjustment according to the fourth adjustment rate within the preset low frequency range is executed.

[0043] When the fifth temperature difference value is not greater than the preset threshold, control the compressor to maintain the current frequency of operation and / or control the fresh air fan of the fresh air conditioner to maintain the current speed of operation.

[0044] Optionally, after the step of controlling the compressor adjustment frequency within the preset low-frequency range according to the fourth adjustment rate, the method further includes:

[0045] When the operating frequency of the compressor reaches the upper limit of the preset low frequency range, the sixth temperature difference value between the current indoor heat exchanger temperature and the fresh air temperature of the fresh air conditioner is obtained.

[0046] When the sixth temperature difference value is within the second target value range, the fresh air fan of the fresh air conditioner is controlled to reduce its speed.

[0047] Optionally, the step of controlling the fresh air fan of the fresh air conditioner to reduce its speed includes:

[0048] The fifth adjustment rate of the fresh air fan is determined based on the second target value range;

[0049] The fresh air fan speed is reduced according to the fifth adjustment rate.

[0050] Optionally, the displacement of the compressor is less than the preset displacement, the preset displacement is the standard displacement corresponding to the preset cooling capacity of the fresh air conditioner, and the preset low frequency range is not less than 8Hz and not greater than 15Hz.

[0051] In addition, to achieve the above objectives, this application also proposes a fresh air conditioner, which includes: a memory, a processor, and a control program for the fresh air conditioner stored in the memory and executable on the processor. When the control program for the fresh air conditioner is executed by the processor, it implements the steps of the control method for the fresh air conditioner as described in any of the above claims.

[0052] In addition, to achieve the above objectives, this application also proposes a storage medium storing a control program for a fresh air conditioner, wherein the control program for the fresh air conditioner, when executed by a processor, implements the steps of the control method for the fresh air conditioner as described in any of the preceding claims.

[0053] This invention proposes a control method for a fresh air conditioner. When the fresh air conditioner is in energy-saving mode, the method obtains temperature parameters according to the operating state of the fresh air function. Based on the temperature parameters, the compressor frequency is controlled to adjust within a preset low-frequency range. The energy-saving frequency of the compressor is no longer fixed, but is adjusted within the preset low-frequency range using the corresponding temperature parameters to adapt to the actual demand for fresh air. This avoids indoor temperature fluctuations when the demand for fresh air changes, thereby improving the energy efficiency of the fresh air conditioner and the comfort of indoor users. Attached Figure Description

[0054] Figure 1 This is a schematic diagram of the hardware structure involved in the operation of an embodiment of the fresh air conditioner of the present invention;

[0055] Figure 2 This is a flowchart illustrating an embodiment of the control method for a fresh air conditioner according to the present invention;

[0056] Figure 3 This is a flowchart illustrating another embodiment of the control method for a fresh air conditioner according to the present invention;

[0057] Figure 4 This is a flowchart illustrating another embodiment of the control method for a fresh air conditioner according to the present invention;

[0058] Figure 5 This is a flowchart illustrating another embodiment of the control method for a fresh air conditioner according to the present invention.

[0059] 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

[0060] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0061] This invention provides a fresh air air conditioner.

[0062] The fresh air conditioning system includes a control device 100, a compressor 200, a fresh air fan 300, and an indoor fan 400. The compressor 200, the indoor fan 400, and the fresh air fan 300 are all connected to the control device 100.

[0063] The indoor fan 400 and the fresh air fan 300 are located in different air ducts. The indoor fan 400 can drive indoor air to exchange heat with the indoor heat exchanger in the fresh air air conditioner, and the fresh air fan 300 can drive outdoor air into the room.

[0064] In this embodiment, compressor 200 is a small-displacement compressor, with a displacement of 70% to 75% of that of a large-displacement compressor, and a minimum frequency of the small-displacement compressor that is less than or equal to 50% of the minimum frequency of the large-displacement compressor. Specifically, the minimum frequency of the large-displacement compressor ranges from [16Hz to 24Hz], and the minimum frequency of the small-displacement compressor ranges from [8Hz to 15Hz].

[0065] In this embodiment, the displacement of the large-displacement compressor is greater than or equal to the standard displacement corresponding to the preset cooling capacity of the fresh air conditioner.

[0066] In this embodiment of the invention, reference is made to Figure 1 The control device 100 for the fresh air conditioner includes: a processor 1001, such as a CPU, a memory 1002, and a timer 1003. These components communicate with each other 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.

[0067] 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.

[0068] like Figure 1 As shown, the memory 1002, which is a computer storage medium, may include a control program for a fresh air conditioning system.

[0069] exist Figure 1 In the device shown, the processor 1001 can be used to call the control program of the fresh air conditioner stored in the memory 1002 and execute the relevant steps of the control method of the fresh air conditioner in the following embodiments.

[0070] This invention also provides a control method for a fresh air conditioner, which is applied to the aforementioned fresh air conditioner.

[0071] Reference Figure 2 This application proposes an embodiment of a control method for a fresh air conditioning unit. In this embodiment, the control method for the fresh air conditioning unit includes:

[0072] Step S10: Control the fresh air conditioner to turn on the energy-saving mode and obtain the operating status of the fresh air function;

[0073] The energy-saving mode can be activated when a start command for energy-saving mode is received, or when the operating parameters of the fresh air conditioner are detected to meet preset conditions.

[0074] Operating status includes whether the fresh air function is turned on and / or the duration of its operation.

[0075] In this embodiment, step S10 is executed when the fresh air conditioner is operating in cooling mode, that is, when the indoor heat exchanger is in evaporation mode. In other embodiments, step S10 can also be executed when the fresh air conditioner is operating in heating mode, that is, when the indoor heat exchanger is in condensation mode.

[0076] The operating status of the fresh air function is obtained when the energy-saving mode is activated or during the operation of the energy-saving mode.

[0077] Step S20: Obtain temperature parameters based on the operating status;

[0078] The temperature parameters here are temperature-related characteristic parameters that characterize the impact of fresh air demand on indoor temperature. Temperature parameters may include the temperature value at a specific moment and / or its variation over a period of time. Temperature parameters may include one or more temperature parameters of different types.

[0079] Different operating states correspond to different temperature parameters. Temperature parameters may include at least one of the following: indoor temperature, indoor heat exchanger temperature, fresh air temperature, set temperature of the fresh air conditioner, and outlet air temperature.

[0080] Step S30: Control the compressor of the fresh air conditioner to adjust its frequency within a preset low-frequency range according to the temperature parameters.

[0081] The preset low-frequency range is specifically the frequency range that the compressor is allowed to operate in when the fresh air conditioner has an energy-saving effect.

[0082] In this embodiment, the preset low-frequency range has an upper limit and a lower limit. In other embodiments, the preset low-frequency range may also have an upper limit but no lower limit.

[0083] In this embodiment, the preset low-frequency range is determined based on the frequency range allowed to operate by the compressor. The lower limit of the preset low-frequency range is the lower limit of the frequency range allowed to operate by the compressor. The displacement of the compressor is less than the preset displacement, which is the standard displacement corresponding to the preset cooling capacity of the fresh air conditioner. The standard displacement is the minimum displacement that a large-displacement compressor can achieve. In other words, the compressor is a small-displacement compressor. The preset low-frequency range is not less than 8Hz and not greater than 15Hz, which is smaller than the minimum frequency range [16Hz, 24Hz] allowed to be achieved by a large-displacement compressor. Based on this, the fresh air conditioner uses a small-displacement compressor with a smaller displacement than a typical large-displacement compressor, which is beneficial for the compressor to operate at a lower frequency range in energy-saving mode, thereby effectively improving the energy-saving effect.

[0084] In one implementation of this embodiment, the adjustment rate is determined based on the temperature parameter, and the compressor is controlled to adjust the frequency within a preset low-frequency range according to the adjustment rate. The frequencies before and after adjustment are both within the preset low-frequency range. The direction of frequency adjustment (increasing or decreasing the frequency, etc.) can be determined based on the temperature difference between the indoor temperature and the set temperature and / or the temperature difference between the indoor temperature and the fresh air temperature.

[0085] In another implementation of this embodiment, the frequency adjustment value is determined based on the temperature parameter, and the frequency is adjusted within a preset frequency range according to the frequency adjustment value. The frequencies before and after adjustment are both within a preset low frequency range.

[0086] Furthermore, after step S30, you can return to execute step S10.

[0087] This invention proposes a control method for a fresh air conditioner. When the fresh air conditioner is in energy-saving mode, the method acquires temperature parameters according to the operating state of the fresh air function. Based on the temperature parameters, the compressor frequency is adjusted within a preset low-frequency range. The energy-saving frequency of the compressor is no longer fixed, but is adjusted within the preset low-frequency range using the corresponding temperature parameters to adapt to the actual demand for fresh air. This avoids indoor temperature fluctuations when the demand for fresh air changes, thereby improving the energy efficiency of the fresh air conditioner and the comfort of indoor users.

[0088] Furthermore, based on the above embodiments, another embodiment of the control method for the fresh air conditioning system of this application is proposed. In this embodiment, reference is made to... Figure 3 Step S20 includes:

[0089] Step S21: When the operating state is that the fresh air function is not turned on, obtain the indoor temperature and set temperature corresponding to the fresh air air conditioner. The temperature parameters include the indoor temperature and the set temperature.

[0090] The indoor temperature is specifically the ambient temperature of the indoor environment regulated by the fresh air conditioning system. It can be detected by a temperature sensor installed at the return air vent of the fresh air conditioning system or by a temperature detection module installed in the indoor environment.

[0091] The set temperature can be the target temperature that the indoor environment needs to reach after the fresh air conditioning is regulated.

[0092] Based on step S21, step S30 may include controlling the compressor to adjust the frequency within a preset low-frequency range according to the temperature difference between the indoor temperature and the set temperature.

[0093] In this embodiment, when the energy-saving mode is run alone, the indoor temperature and the set temperature can be combined to accurately reflect the matching between the indoor environment and the user's comfort. Therefore, controlling the compressor operation within the preset low-frequency range by combining the indoor temperature and the set temperature is beneficial to effectively improve the comfort of indoor users.

[0094] Furthermore, in this embodiment, referring to Figure 3 Step S30 includes:

[0095] Step S311: Determine the first temperature difference between the indoor temperature and the set temperature;

[0096] In this embodiment, the first temperature difference value is the absolute value of the difference between the indoor temperature and the set temperature. The larger the first temperature difference value, the greater the deviation between the indoor environment and the user's comfort needs; the smaller the first temperature difference value, the smaller the deviation between the indoor environment and the user's comfort needs.

[0097] Step S312: Determine the first adjustment rate of the compressor based on the first temperature difference value, wherein the first adjustment rate is positively correlated with the first temperature difference value;

[0098] The first adjustment rate is specifically the change in compressor frequency per unit time.

[0099] The positive correlation between the first adjustment rate and the first temperature difference means that the first adjustment rate increases as the first temperature difference increases, and decreases as the first temperature difference decreases. The change in the first adjustment rate with the first temperature difference can be continuous or discontinuous.

[0100] Different first temperature difference values ​​correspond to different first adjustment rates. A pre-established correspondence between the first temperature difference value and the first adjustment rate can be established, which may include calculation formulas, mapping relationships, etc. Based on this correspondence, the first adjustment rate corresponding to the current first temperature difference value can be determined.

[0101] In this embodiment, the first adjustment rate is determined based on the target deviation range where the first temperature difference value is located. Specifically, at least two deviation ranges can be pre-divided, each deviation range corresponding to a preset adjustment rate associated with the compressor frequency. The at least two deviation ranges can be continuous or discontinuous. The deviation range where the first temperature difference value is located is determined as the target deviation range among the at least two deviation ranges, and the preset adjustment rate associated with the target deviation range is determined as the first adjustment rate.

[0102] For example, if the indoor temperature is T1 and the set temperature is Ts, then |T1-Ts| is the first temperature difference value. When |T1-Ts|>3℃, the first adjustment rate is 1.5; when 1℃<|T1-Ts|<3℃, the first adjustment rate is 1; and when 0℃<|T1-Ts|<1℃, the first adjustment rate is 0.5.

[0103] Step S313: Control the compressor adjustment frequency within the preset low-frequency range according to the first adjustment rate.

[0104] When it is necessary to increase the compressor's operating frequency, control the compressor to increase its operating frequency at a first adjustment rate until it reaches the upper limit of the preset low-frequency range. At this point, the compressor can be controlled to maintain operation at the upper limit.

[0105] When it is necessary to reduce the compressor operating frequency, control the compressor to reduce the operating frequency at the first adjustment rate until it reaches the lower limit of the preset low frequency range. At this time, the compressor can be controlled to maintain the lower limit operation.

[0106] The adjustment direction of the compressor frequency can be determined based on the first temperature difference value. When the first temperature difference value is greater than the first preset value, the adjustment direction of the compressor can be determined to increase the operating frequency; when the first temperature difference value is less than the second preset value, the adjustment direction of the compressor can be determined to decrease the operating frequency.

[0107] In this embodiment, when the first temperature difference is large, the indoor environment deviates significantly from user comfort. In this case, using a larger first adjustment rate to control the compressor to adjust its operating frequency is beneficial for the rapid adjustment of the compressor's output capacity and for the indoor environment to quickly change towards user comfort requirements, thereby effectively improving indoor user comfort. When the first temperature difference is small, the indoor environment is close to user comfort requirements. In this case, using a smaller first adjustment rate to control the compressor to adjust its operating frequency is beneficial for ensuring user comfort while improving the operational stability of the compressor and even the entire system.

[0108] In other embodiments, the first adjustment rate can also be calculated by substituting the first temperature difference value into the first preset formula.

[0109] Furthermore, based on any of the above embodiments, another embodiment of the control method for the fresh air conditioning system of this application is proposed. In this embodiment, reference is made to... Figure 4 Step S20 includes:

[0110] Step S22: When the operating state is that the fresh air function is turned on after the energy-saving mode is started, the indoor temperature and fresh air temperature corresponding to the fresh air air conditioner are obtained, and the temperature parameters include the indoor temperature and the fresh air temperature.

[0111] Specifically, after the energy-saving mode is activated, the on / off status of the fresh air function is monitored at set intervals or in real time during the operation of the energy-saving mode. When the activation of the fresh air function is detected, the ambient temperature of the indoor environment currently regulated by the fresh air conditioning can be obtained as the indoor temperature, and the current inlet temperature of the fresh air duct of the fresh air conditioning can be obtained as the fresh air temperature.

[0112] Based on step S22, step S30 may include controlling the compressor to adjust its frequency within a preset low-frequency range according to the temperature difference between the indoor temperature and the fresh air temperature.

[0113] In this embodiment, when the fresh air function is activated during the operation of the energy-saving mode, the fresh air function is activated after the fresh air air conditioner has regulated the indoor environment for a period of time. Combining the indoor temperature and the fresh air temperature can accurately reflect the impact of the introduction of fresh air on the fluctuation of indoor ambient temperature. Therefore, by combining the indoor temperature and the fresh air temperature, the compressor operation is controlled within a preset low-frequency range, which effectively saves energy while avoiding indoor temperature fluctuations caused by the introduction of fresh air, and improves user comfort during the operation of the fresh air air conditioner.

[0114] Furthermore, in this embodiment, referring to Figure 4 Step S30 includes:

[0115] Step S321: Determine the second temperature difference between the indoor temperature and the fresh air temperature;

[0116] In this embodiment, the second temperature difference value is the absolute value of the difference between the indoor temperature and the fresh air temperature. The larger the second temperature difference value, the greater the risk of indoor temperature fluctuations caused by the introduction of fresh air; the smaller the second temperature difference value, the less the risk of indoor temperature fluctuations caused by the introduction of fresh air.

[0117] Step S322: Determine the second adjustment rate of the compressor based on the second temperature difference value, wherein the second adjustment rate is positively correlated with the second temperature difference value;

[0118] The second adjustment rate is specifically the change in compressor frequency per unit time.

[0119] The positive correlation between the second adjustment rate and the second temperature difference means that the second adjustment rate increases as the second temperature difference increases, and decreases as the second temperature difference decreases. The change in the second adjustment rate with the second temperature difference can be continuous or discontinuous.

[0120] Different second temperature difference values ​​correspond to different second adjustment rates. A pre-established correspondence between the second temperature difference value and the second adjustment rate can be established, including calculation formulas, mapping relationships, etc. Based on this correspondence, the second adjustment rate corresponding to the current second temperature difference value can be determined.

[0121] In this embodiment, the second adjustment rate is determined based on the first target numerical range in which the second temperature difference value is located. Specifically, at least two numerical ranges can be pre-divided, each numerical range corresponding to a preset adjustment rate associated with the compressor frequency. The at least two numerical ranges can be continuous or discontinuous. The numerical range in which the second temperature difference value is located is determined as the first target numerical range, and the preset adjustment rate associated with the first target numerical range is determined as the second adjustment rate.

[0122] For example, if the indoor temperature is T1 and the set temperature is T... 新 ,|T1-T 新 | represents the second temperature difference value, when |T1-T 新 When |> 5℃, the second adjustment rate is 2; when 3℃ < |T1-T 新 When |T<5℃, the second adjustment rate is 1.5; when 1℃ < |T1 - T2 新 When |T<3℃, the second adjustment rate is 1; when 0℃ <|T1-T 新 When the temperature is less than 1℃, the second adjustment rate is 0.5.

[0123] Step S323: Control the compressor to adjust the frequency within the preset low frequency range according to the second adjustment rate.

[0124] When it is necessary to increase the compressor's operating frequency, the compressor is controlled to increase its operating frequency at a second adjustment rate until it reaches the upper limit of the preset low frequency range. At this time, the compressor can be controlled to maintain the operation at the upper limit value.

[0125] When it is necessary to reduce the compressor operating frequency, the compressor is controlled to reduce the operating frequency at the second adjustment rate until it reaches the lower limit of the preset low frequency range. At this time, the compressor can be controlled to maintain the lower limit operation.

[0126] The adjustment direction of the compressor frequency can be determined based on the second temperature difference value. When the second temperature difference value is greater than the second preset value, the adjustment direction of the compressor can be determined to increase the operating frequency; when the second temperature difference value is less than the second preset value, the adjustment direction of the compressor can be determined to decrease the operating frequency.

[0127] In this embodiment, when the second temperature difference is large, the risk of indoor temperature fluctuation caused by the introduction of fresh air is greater. At this time, using a larger second adjustment rate to control the compressor to adjust its operating frequency is beneficial for the rapid adjustment of the compressor's output capacity, ensuring that the fresh air conditioner can output sufficient heat exchange to compensate for the indoor energy loss caused by the introduction of fresh air, thereby effectively reducing indoor temperature fluctuations during the fresh air introduction process, so as to make the fresh air conditioner energy-saving and improve the comfort of indoor users during the fresh air introduction process. When the second temperature difference is small, the risk of indoor temperature fluctuation caused by the introduction of fresh air is smaller. At this time, using a smaller second adjustment rate to control the compressor to adjust its operating frequency is beneficial for ensuring the comfort of indoor users during the fresh air introduction process while improving the operational stability of the compressor and even the entire system.

[0128] In other embodiments, the second adjustment rate can also be calculated by substituting the second temperature difference value into the second preset formula.

[0129] Furthermore, in this embodiment, referring to Figure 4 After step S323, the following steps are also included:

[0130] Step S324: When the operating frequency of the compressor reaches the upper limit of the preset low frequency range, obtain the third temperature difference value between the current indoor temperature and the fresh air temperature of the fresh air conditioner.

[0131] When the compressor's operating frequency reaches the upper limit frequency and the duration reaches the first preset duration (e.g., 10 to 15 minutes), the current indoor temperature and the current fresh air intake temperature of the indoor environment regulated by the fresh air air conditioner can be detected, and the absolute value of the difference between the current indoor temperature and the current fresh air intake temperature can be determined as the third temperature difference value.

[0132] The third temperature difference value can accurately characterize the risk of indoor ambient temperature fluctuations after the compressor frequency is adjusted.

[0133] Step S325: When the third temperature difference value is within the first target value range, control the indoor fan of the fresh air conditioner to reduce its speed.

[0134] When the indoor heat exchanger is in the evaporation state, reducing the indoor fan speed can increase the cooling capacity input into the room; when the indoor heat exchanger is in the condensation state, reducing the indoor fan speed can increase the heating capacity input into the room.

[0135] The indoor fan speed can be reduced by adjusting the speed according to the preset fixed speed parameters, or by adjusting the speed parameters according to the actual operating status of the fresh air conditioner.

[0136] In this embodiment, when the compressor's operating frequency reaches the upper limit of the preset low-frequency range, and the third temperature difference value is within the first target value range, it indicates that the risk of indoor ambient temperature fluctuation remains unchanged before and after adjusting the compressor frequency based on the second adjustment rate. The compressor frequency adjustment cannot effectively reduce the risk of indoor temperature fluctuation when fresh air is introduced. At this time, reducing the indoor fan speed is beneficial to ensure that the indoor air outlet can output enough energy to compensate for the loss of indoor energy caused by the introduction of fresh air, thereby effectively improving the comfort of indoor users during the process of introducing fresh air by the fresh air air conditioner.

[0137] In other embodiments, when the operating frequency of the compressor reaches the upper limit of the preset low frequency range, if the deviation between the third temperature difference value and the first temperature difference value is less than the preset value, the indoor fan of the fresh air conditioner is controlled to reduce its speed; if the deviation between the third temperature difference value and the first temperature difference value is greater than or equal to the preset value, the process returns to step S22.

[0138] Furthermore, in this embodiment, the step of controlling the indoor fan of the fresh air conditioner to reduce its speed includes: determining a third adjustment rate of the indoor fan based on the first target value range, wherein the third adjustment rate is positively correlated with the first target value range; and controlling the indoor fan to reduce its speed according to the third adjustment rate.

[0139] The third adjustment rate is the amount of speed adjustment of the indoor fan per unit time.

[0140] Different first target value ranges correspond to different third adjustment rates. As the upper or lower limit of the first target value range increases, the third adjustment rate tends to increase; as the upper or lower limit of the first target value range decreases, the third adjustment rate tends to decrease.

[0141] For example, if the indoor temperature is T1 and the set temperature is T... 新 ,|T1-T 新| represents the third temperature difference value, when |T1-T 新 When |> 5℃, the third adjustment rate is -10% / 30s; when 3℃ < |T1-T 新 When | < 5℃, the third adjustment rate is -5% / 30s; when 1℃ < |T1-T 新 When |<3℃, the third adjustment rate is -3% / 30s; when 0℃ <|T1-T 新 When the temperature is less than 1℃, the third adjustment rate is 0, which means that the indoor fan can maintain the current speed.

[0142] In this embodiment, the third adjustment rate for reducing the speed of the indoor fan is determined based on the first target value range. This ensures that the reduction in the speed of the indoor fan can effectively reduce the risk of indoor temperature fluctuations during the fresh air introduction process, thereby further improving the comfort of indoor users during the fresh air introduction process.

[0143] In other embodiments, the third adjustment rate can also be determined based on the third temperature difference value; or, the third adjustment rate can be determined based on other state parameters related to the operation of the fresh air conditioner. For example, the indoor temperature change value and the compressor noise change value can be obtained when the compressor adjusts its operating frequency at the second adjustment rate. The third adjustment rate can be determined based on the indoor temperature change value, the second adjustment rate, and the noise change value, thereby avoiding indoor temperature fluctuations and reducing the operating noise of the air conditioner.

[0144] Furthermore, in this embodiment, after the step of controlling the indoor fan of the fresh air conditioner to reduce its speed, the method further includes: when the indoor fan reaches the minimum speed corresponding to the energy-saving mode, controlling the fresh air fan of the fresh air conditioner to reduce its operating speed.

[0145] The operating speed of the fresh air fan can be reduced according to a pre-set fixed speed adjustment value, or it can be reduced according to the relevant parameters of the fresh air conditioning operation.

[0146] Specifically, the speed adjustment parameters can be determined based on the first target value range or the third temperature difference value, and the fresh air fan can be controlled to reduce its operating speed according to the speed adjustment parameters. Alternatively, the first indoor temperature change value and the first noise change value of the compressor can be obtained when the compressor adjusts its operating frequency at the second adjustment rate, and the second indoor temperature change value and the second noise change value of the indoor fan can be obtained when the indoor fan reduces its speed at the third adjustment rate. Based on the first indoor temperature change value, the second indoor temperature change value, the second adjustment rate, the third adjustment rate, the first noise change value, and the second noise change value, a sixth adjustment rate can be determined, and the fresh air fan can be controlled to reduce its speed according to the sixth adjustment rate, thereby avoiding indoor temperature fluctuations and reducing air conditioning operating noise.

[0147] In this embodiment, when adjusting the indoor fan and compressor cannot effectively reduce the risk of indoor temperature fluctuations, the indoor temperature fluctuations are reduced by decreasing the speed of the fresh air fan, thereby ensuring indoor freshness while improving the comfort of indoor users.

[0148] Furthermore, based on any of the above embodiments, another embodiment of the control method for the fresh air conditioning system of this application is proposed. In this embodiment, reference is made to... Figure 5 Step S20 includes:

[0149] Step S23: When the operating state is that the fresh air function and the energy-saving mode are both turned on, the indoor heat exchanger temperature and the fresh air temperature of the fresh air air conditioner are obtained, and the temperature parameters include the indoor heat exchanger temperature and the fresh air temperature.

[0150] When the energy-saving mode is activated, it can detect whether the fresh air function is activated simultaneously. When the energy-saving mode and the fresh air function are activated at the same time, the temperature currently detected by the temperature sensor on the indoor heat exchanger coil can be obtained as the indoor heat exchanger temperature, and the current inlet temperature of the fresh air duct of the fresh air conditioner can be obtained as the fresh air temperature.

[0151] Based on step S23, step S30 may include controlling the compressor to adjust the frequency within a preset low-frequency range according to the temperature difference between the indoor heat exchanger temperature and the fresh air temperature.

[0152] In this embodiment, the energy-saving mode and the fresh air function are activated simultaneously. Directly detecting the indoor temperature cannot reflect the impact of fresh air introduction on indoor users when the air conditioner is in energy-saving mode. However, the indoor heat exchanger temperature can accurately reflect the energy output of the air conditioner, and the fresh air temperature can accurately reflect the impact of the energy carried by the introduced fresh air on indoor temperature fluctuations. By combining the indoor heat exchange temperature and the fresh air temperature, the compressor operation is controlled within a preset low-frequency range, which effectively saves energy while avoiding indoor temperature fluctuations caused by the introduction of fresh air, and improves user comfort during the operation of the fresh air air conditioner.

[0153] Furthermore, in this embodiment, referring to Figure 5 Step S30 includes:

[0154] Step S331: Determine the fourth temperature difference between the indoor heat exchanger temperature and the fresh air temperature;

[0155] In this embodiment, the fourth temperature difference value is the absolute value of the difference between the indoor heat exchanger temperature and the fresh air temperature. A larger fourth temperature difference value indicates a greater risk of indoor temperature fluctuations caused by the introduction of fresh air, while a smaller fourth temperature difference value indicates a lower risk of indoor temperature fluctuations caused by the introduction of fresh air.

[0156] Step S332: Determine the fourth adjustment rate of the compressor based on the fourth temperature difference value, wherein the fourth adjustment rate is positively correlated with the fourth temperature difference value;

[0157] The fourth adjustment rate is specifically the change in compressor frequency per unit time.

[0158] The positive correlation between the fourth adjustment rate and the fourth temperature difference value means that as the fourth temperature difference value increases, the fourth adjustment rate tends to increase; and as the fourth temperature difference value decreases, the fourth adjustment rate tends to decrease. The change in the fourth adjustment rate with the fourth temperature difference value can be either continuous or discontinuous.

[0159] Different fourth temperature difference values ​​correspond to different fourth adjustment rates. A pre-established correspondence between the fourth temperature difference value and the fourth adjustment rate can be established, including calculation formulas, mapping relationships, etc. Based on this correspondence, the fourth adjustment rate corresponding to the current fourth temperature difference value can be determined.

[0160] In this embodiment, the fourth adjustment rate is determined based on the second target numerical range in which the fourth temperature difference value is located. Specifically, at least two numerical ranges can be pre-divided, each numerical range corresponding to a preset adjustment rate associated with the compressor frequency. The at least two numerical ranges can be continuous or discontinuous. The numerical range in which the fourth temperature difference value is located is determined as the second target numerical range, and the preset adjustment rate associated with the second target numerical range is determined as the fourth adjustment rate.

[0161] For example, the indoor heat exchanger temperature is T2, and the set temperature is T. 新 |T2-T 新 | is the fourth temperature difference value, when |T2-T 新 When |> 5℃, the fourth adjustment rate is 2; when 3℃ < |T2-T 新 When |T<5℃, the fourth adjustment rate is 1.5; when 1℃ < |T2 - T2 新 When |<3℃, the fourth adjustment rate is 1; when 0℃<|T2-T 新 When the temperature is less than 1℃, the fourth regulation rate is 0.5.

[0162] Step S333: Control the compressor adjustment frequency within the preset low-frequency range according to the fourth adjustment rate.

[0163] When it is necessary to increase the compressor's operating frequency, control the compressor to increase its operating frequency at the fourth adjustment rate until it reaches the upper limit of the preset low-frequency range. At this point, the compressor can be controlled to maintain operation at the upper limit.

[0164] When it is necessary to reduce the compressor operating frequency, the compressor is controlled to reduce the operating frequency at the fourth adjustment rate until it reaches the lower limit of the preset low frequency range. At this time, the compressor can be controlled to maintain the lower limit operation.

[0165] The adjustment direction of the compressor frequency can be determined based on the fourth temperature difference value. When the fourth temperature difference value is greater than the fourth preset value, the adjustment direction of the compressor can be determined to increase the operating frequency; when the fourth temperature difference value is less than the fourth preset value, the adjustment direction of the compressor can be determined to decrease the operating frequency.

[0166] In this embodiment, when the fourth temperature difference value is large, the risk of indoor temperature fluctuation caused by the introduction of fresh air is greater. At this time, using a larger fourth adjustment rate to control the compressor to adjust its operating frequency is beneficial for the rapid adjustment of the compressor's output capacity, ensuring that the fresh air conditioner can output sufficient heat exchange to compensate for the indoor energy loss caused by the introduction of fresh air, thereby effectively reducing indoor temperature fluctuations during the fresh air introduction process, so as to make the fresh air conditioner energy-saving and improve the comfort of indoor users during the fresh air introduction process. When the fourth temperature difference value is small, the risk of indoor temperature fluctuation caused by the introduction of fresh air is smaller. At this time, using a smaller fourth adjustment rate to control the compressor to adjust its operating frequency is beneficial for ensuring the comfort of indoor users during the fresh air introduction process while improving the operational stability of the compressor and even the entire system.

[0167] In other embodiments, the fourth adjustment rate can also be calculated by substituting the fourth temperature difference value into the fourth preset formula.

[0168] Furthermore, in this embodiment, the step of determining the fourth adjustment rate based on the second target value range where the fourth temperature difference value is located, performed simultaneously or afterward, further includes: acquiring the indoor temperature and set temperature corresponding to the fresh air conditioner; determining a fifth temperature difference value between the indoor temperature and the set temperature; when the fifth temperature difference value is greater than a preset threshold, performing the step of controlling the compressor to adjust its frequency according to the fourth adjustment rate within the preset low-frequency range; when the fifth temperature difference value is not greater than the preset threshold, controlling the compressor to maintain its current frequency operation and / or controlling the fresh air fan of the fresh air conditioner to maintain its current speed operation.

[0169] The indoor temperature here refers to the same concept as the set temperature mentioned above, and will not be elaborated upon here.

[0170] The indoor temperature is the temperature value detected at the current moment, and the set temperature is the target temperature that the indoor environment needs to achieve at the current moment.

[0171] The fifth temperature difference value is the absolute value of the difference between the indoor temperature and the set temperature.

[0172] The preset threshold is specifically used to distinguish whether the indoor ambient temperature meets the user's comfort level. When the fifth temperature difference value is greater than the preset threshold, it indicates that the indoor ambient temperature does not meet the user's comfort level; when the fifth temperature difference value is not greater than the preset threshold, it indicates that the indoor ambient temperature meets the user's comfort level.

[0173] In this embodiment, when the energy-saving mode and the fresh air function are activated simultaneously, if the indoor ambient temperature meets the user's comfort level based on the fifth temperature difference value, the compressor and the fresh air fan maintain their current parameters. This helps improve the stability of the fresh air conditioning operation and ensures the comfort of the indoor users. If the indoor ambient temperature does not meet the user's comfort level based on the fifth temperature difference value, the compressor's adjustment frequency is controlled within a preset low-frequency range based on the fourth adjustment rate. This saves energy while ensuring that the compressor's output capacity can be precisely adjusted to meet the indoor comfort requirements, thereby further improving the comfort of the indoor users.

[0174] Furthermore, in this embodiment, referring to Figure 5 After step S333, the following steps are also included:

[0175] Step S334: When the operating frequency of the compressor reaches the upper limit of the preset low frequency range, obtain the sixth temperature difference value between the current indoor heat exchanger temperature and the fresh air temperature of the fresh air conditioner.

[0176] When the compressor's operating frequency reaches this upper limit, the current coil temperature of the indoor heat exchanger and the current fresh air intake temperature can be detected, and the absolute value of the difference between the current coil temperature and the current fresh air intake temperature can be determined as the sixth temperature difference value.

[0177] The sixth temperature difference value can accurately characterize the risk of indoor ambient temperature fluctuations after the compressor frequency is adjusted.

[0178] Step S335: When the sixth temperature difference value is within the second target value range, control the fresh air fan of the fresh air conditioner to reduce its speed.

[0179] The speed of the fresh air fan can be reduced by adjusting the speed according to the preset fixed speed parameters, or by adjusting the speed parameters according to the actual operating status of the fresh air conditioner.

[0180] In this embodiment, when the compressor's operating frequency reaches the upper limit of the preset low-frequency range, and the sixth temperature difference value is in the second target value range, it indicates that the risk of indoor ambient temperature fluctuation remains unchanged before and after adjusting the compressor frequency based on the fourth adjustment rate. The compressor frequency adjustment cannot effectively reduce the risk of indoor temperature fluctuation when fresh air is introduced. At this time, reducing the speed of the fresh air fan is beneficial to reducing the indoor energy loss caused by the introduction of fresh air, thereby effectively improving the comfort of indoor users during the process of introducing fresh air by the fresh air air conditioner.

[0181] In other embodiments, when the operating frequency of the compressor reaches the upper limit of the preset low frequency range, if the deviation between the sixth temperature difference value and the fourth temperature difference value is less than the preset value, the fresh air fan of the fresh air conditioner is controlled to reduce its speed; if the deviation between the sixth temperature difference value and the fourth temperature difference value is greater than or equal to the preset value, the process returns to step S23.

[0182] Furthermore, in this embodiment, the step of controlling the fresh air fan of the fresh air conditioner to reduce its speed includes: determining a fifth adjustment rate of the fresh air fan according to the second target value range; and controlling the fresh air fan to reduce its speed according to the fifth adjustment rate.

[0183] The fifth adjustment rate is the amount of speed adjustment of the fresh air fan per unit time.

[0184] Different second target value ranges correspond to different fifth adjustment rates. As the upper or lower limit of the second target value range increases, the fifth adjustment rate tends to increase; as the upper or lower limit of the second target value range decreases, the fifth adjustment rate tends to decrease.

[0185] For example, the indoor heat exchanger temperature is T2, and the set temperature is T. 新 |T2-T 新 | is the sixth temperature difference value, when |T2-T 新 When |> 5℃, the fifth adjustment rate is -10% / 30s; when 3℃ < |T2-T 新 When | < 5℃, the fifth adjustment rate is -5% / 30s; when 1℃ < |T2-T 新 When | < 3℃, the fifth adjustment rate is -3% / 30s; when 0℃ < |T2-T 新 When the temperature is less than 1℃, the fifth adjustment rate is -1% / 30s.

[0186] In this embodiment, the fifth adjustment rate for reducing the speed of the fresh air fan is determined based on the second target value range. This ensures that the indoor fan speed can be reduced to effectively reduce the risk of indoor temperature fluctuations during the fresh air introduction process, thereby further improving the comfort of indoor users during the fresh air introduction process.

[0187] In other embodiments, the fifth adjustment rate can also be determined based on the fifth temperature difference value; or, the fifth adjustment rate can be determined based on other state parameters related to the operation of the fresh air conditioner. For example, the indoor temperature change value and the compressor noise change value can be obtained when the compressor adjusts its operating frequency at the fourth adjustment rate. The fifth adjustment rate can be determined based on the indoor temperature change value, the fourth adjustment rate, and the noise change value, thereby avoiding indoor temperature fluctuations and reducing the operating noise of the air conditioner.

[0188] Furthermore, this embodiment of the invention also proposes a storage medium storing a control program for a fresh air conditioner. When the control program for the fresh air conditioner is executed by a processor, it implements the relevant steps of any embodiment of the control method for the fresh air conditioner described above.

[0189] 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.

[0190] 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.

[0191] 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, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product 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, fresh air conditioner, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0192] 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 of a fresh air conditioner, characterized by, The control method of the fresh air conditioner comprises the following steps: controlling the fresh air conditioner to start the energy-saving mode and obtaining the running state of the fresh air function; obtaining a temperature parameter according to the running state, comprising: when the running state is that the fresh air function is started after the energy-saving mode is started, obtaining the indoor temperature and the fresh air temperature corresponding to the fresh air conditioner, and the temperature parameter comprises the indoor temperature and the fresh air temperature; controlling the compressor of the fresh air conditioner to adjust the frequency in a preset low frequency range according to the temperature parameter.

2. The control method of a fresh air conditioner according to claim 1, characterized by, The step of obtaining the temperature parameter according to the running state comprises: when the running state is that the fresh air function is not started, obtaining the indoor temperature and the set temperature corresponding to the fresh air conditioner, and the temperature parameter comprises the indoor temperature and the set temperature. 3.The control method of the fresh air conditioner of claim 2, wherein The step of controlling the compressor of the fresh air conditioner to adjust the frequency in the preset low frequency range according to the temperature parameter comprises: determining a first temperature difference value of the indoor temperature and the set temperature; determining a first adjustment rate of the compressor according to the first temperature difference value, the first adjustment rate being positively correlated with the first temperature difference value; controlling the compressor to adjust the frequency in the preset low frequency range according to the first adjustment rate.

4. The control method of a fresh air conditioner according to claim 1, characterized by, The step of controlling the compressor of the fresh air conditioner to adjust the frequency in the preset low frequency range according to the temperature parameter comprises: determining a second temperature difference value of the indoor temperature and the fresh air temperature; determining a second adjustment rate of the compressor according to the second temperature difference value, the second adjustment rate being positively correlated with the second temperature difference value; controlling the compressor to adjust the frequency in the preset low frequency range according to the second adjustment rate.

5. The control method of a fresh air conditioner according to claim 4, characterized in that, The step of determining the second adjustment rate of the compressor according to the second temperature difference value comprises: determining the second adjustment rate according to a first target numerical interval in which the second temperature difference value is located. 6.The control method of the fresh air conditioner of claim 5, wherein After the step of controlling the compressor to adjust the frequency in the preset low frequency range according to the second adjustment rate, the method further comprises: when the running frequency of the compressor reaches an upper limit frequency of the preset low frequency range, obtaining a third temperature difference value between the current indoor temperature and the fresh air temperature of the fresh air conditioner; when the third temperature difference value is in the first target numerical interval, controlling the indoor fan of the fresh air conditioner to reduce the rotating speed.

7. The control method of a fresh air conditioner according to claim 6, characterized by, The step of controlling the indoor fan of the fresh air conditioner to reduce the rotating speed comprises: determining a third adjustment rate of the indoor fan according to the first target numerical interval, the third adjustment rate being positively correlated with the first target numerical interval; controlling the indoor fan to reduce the rotating speed according to the third adjustment rate. 8.The control method of the fresh air conditioner of claim 6, wherein, After the step of controlling the indoor fan of the fresh air conditioner to reduce the rotating speed, the method further comprises: when the indoor fan reaches a minimum rotating speed corresponding to the energy-saving mode, controlling the fresh air fan of the fresh air conditioner to reduce the running rotating speed. 9.The control method of the fresh air conditioner of claim 1, wherein, The step of obtaining the temperature parameter according to the running state comprises: When the operation state is that the fresh air function and the energy-saving mode are simultaneously turned on, an indoor heat exchanger temperature and a fresh air temperature of the fresh air conditioner are obtained, and the temperature parameters include the indoor heat exchanger temperature and the fresh air temperature. 10.The control method of the fresh air conditioner of claim 9, wherein, The step of controlling the compressor of the fresh air conditioner to adjust the frequency in the preset low frequency range according to the temperature parameters comprises: determining a fourth temperature difference value between the indoor heat exchanger temperature and the fresh air temperature; determining a fourth adjustment rate of the compressor according to the fourth temperature difference value, the fourth adjustment rate being positively correlated with the fourth temperature difference value; controlling the compressor to adjust the frequency in the preset low frequency range at the fourth adjustment rate. 11.The control method of the fresh air conditioner of claim 10, wherein, The step of determining the fourth adjustment rate of the compressor according to the fourth temperature difference value comprises: determining the fourth adjustment rate according to a second target numerical interval in which the fourth temperature difference value is located. 12.The control method of the fresh air conditioner of claim 11, wherein, The step of determining the fourth adjustment rate according to the second target numerical interval in which the fourth temperature difference value is located is performed simultaneously or after the step of determining the fourth temperature difference value between the indoor heat exchanger temperature and the fresh air temperature. obtaining an indoor temperature and a set temperature corresponding to the fresh air conditioner; determining a fifth temperature difference value between the indoor temperature and the set temperature; when the fifth temperature difference value is greater than a preset threshold, performing the step of controlling the compressor to adjust the frequency in the preset low frequency range at the fourth adjustment rate; when the fifth temperature difference value is not greater than the preset threshold, controlling the compressor to maintain a current frequency and / or controlling a fresh air fan of the fresh air conditioner to maintain a current rotating speed. 13.The control method of the fresh air conditioner of claim 11, wherein, The step of controlling the compressor to adjust the frequency in the preset low frequency range at the fourth adjustment rate is further followed by: when the operating frequency of the compressor reaches an upper limit frequency of the preset low frequency range, obtaining a sixth temperature difference value between a current indoor heat exchanger temperature and a current fresh air temperature of the fresh air conditioner; when the sixth temperature difference value is within the second target numerical interval, controlling the fresh air fan of the fresh air conditioner to reduce the rotating speed. 14.The control method of the fresh air conditioner of claim 13, wherein, The step of controlling the fresh air fan of the fresh air conditioner to reduce the rotating speed comprises: determining a fifth adjustment rate of the fresh air fan according to the second target numerical interval; controlling the fresh air fan to reduce the rotating speed at the fifth adjustment rate.

15. The control method of a fresh air conditioner according to any one of claims 1 to 14, characterized by, The displacement of the compressor is less than a preset displacement, the preset displacement being a standard displacement corresponding to a preset refrigerating capacity of the fresh air conditioner, and the preset low frequency range is not less than 8 Hz and not more than 15 Hz.

16. A fresh air conditioner characterized by comprising: The fresh air conditioner comprises a memory, a processor, and a control program of the fresh air conditioner stored on the memory and executable on the processor, and the control program of the fresh air conditioner, when executed by the processor, implements the steps of the control method of the fresh air conditioner according to any one of claims 1 to 15.

17. A storage medium, characterized by The storage medium has stored thereon a control program of the fresh air conditioner, and the control program of the fresh air conditioner, when executed by the processor, implements the steps of the control method of the fresh air conditioner according to any one of claims 1 to 15.

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