Condensing fan control method, device, air conditioner and readable storage medium

Abstract

The present application provides a condensing fan control method, device, air conditioner and readable storage medium. The present application includes: obtaining the condensing pressure of the air conditioner and the fan speed of the target condensing fan in the air conditioner; determining the target adjustment speed according to the condensing pressure and the fan speed; judging whether the target adjustment speed is the normal working speed according to the condensing pressure; if the target adjustment speed is the normal working speed, controlling the target condensing fan in the air conditioner to work according to the target adjustment speed to adjust the condensing pressure. The present application adjusts the condensing pressure of the air conditioner by changing the fan speed, thereby avoiding the situation where the condensing pressure drops due to the low outside temperature, thereby affecting the reliability of the air conditioner. When adjusting the fan speed, first judge whether the adjusted target adjustment speed will affect the normal operation of the air conditioner. If the target adjustment speed does not affect the normal operation of the air conditioner, the reliability is higher.

Description

Technical Field

[0001] The present application relates to the field of air conditioning technology, and in particular to a condensing fan control method, device, air conditioner and readable storage medium. Background Art

[0002] Precision computer room air conditioners are used in data centers, computer rooms, battery rooms and other places to cool the equipment therein and provide a suitable working environment. Because the equipment in such places runs uninterruptedly throughout the year and generates a large amount of heat, the refrigeration equipment is required to have stable and reliable refrigeration operation regardless of the season. In order to ensure that the refrigeration equipment can operate reliably when the outdoor temperature is high, a larger heat exchange capacity design is usually adopted on the condensing side. When the outdoor temperature is low, this design idea will lead to a large excess of heat exchange capacity on the condensing side. If no measures are taken to reduce the heat exchange capacity on the condensing side, the condensing pressure will be too low, which will bring about a series of reliability problems. Therefore, when the outdoor temperature is low, measures need to be taken to reduce the heat exchange capacity on the condensing side and maintain the condensing pressure within a reasonable range. It is also necessary to ensure that the reliability of the air conditioner is not affected when the heat exchange capacity is reduced. Summary of the invention

[0003] The present application provides a condensing fan control method, device, air conditioner and readable storage medium, which are intended to solve the problem that when outdoor low temperature conditions occur, the heat exchange capacity on the condensing side needs to be reduced to maintain the condensing pressure within a reasonable range, and it is also necessary to ensure that the reliability of the air conditioner is not affected when the heat exchange capacity is reduced.

[0004] In a first aspect, the present application provides a condensing fan control method, the method comprising:

[0005] Acquiring a condensing pressure of an air conditioner and a fan speed of a target condensing fan in the air conditioner;

[0006] Determining a target adjustment speed according to the condensing pressure and the fan speed;

[0007] determining, according to the condensing pressure, whether the target adjustment speed is a normal working speed;

[0008] If the target adjustment speed is a normal operating speed, the target condensing fan in the air conditioner is controlled to operate according to the target adjustment speed to adjust the condensing pressure.

[0009] In a possible implementation, determining the target adjustment speed according to the condensing pressure and the fan speed includes:

[0010] Determine a target pressure interval to which the condensing pressure belongs;

[0011] The target adjustment speed is calculated according to the speed adjustment value corresponding to the target pressure interval and the fan speed.

[0012] In a possible implementation, judging, according to the condensing pressure, whether the target adjustment speed is a normal operating speed includes:

[0013] Acquire a target pressure interval to which the condensing pressure belongs, and a target limit speed corresponding to the target pressure interval;

[0014] If the target pressure interval is a preset high pressure interval, and the target adjustment speed is less than the target limit speed, then determining that the target adjustment speed is a normal working speed;

[0015] If the target pressure interval is a preset low pressure interval, and the target adjustment speed is greater than the target limit speed, it is determined that the target adjustment speed is a normal operating speed.

[0016] In a possible implementation, after determining whether the target adjustment speed is a normal operating speed according to the condensing pressure, the method further includes:

[0017] If the target adjustment speed is an abnormal operating speed, and the target pressure interval to which the condensing pressure belongs is a preset low pressure interval, then obtaining a target limit speed corresponding to the target adjustment speed;

[0018] calculating a speed difference between the target adjusted speed and the target limit speed;

[0019] comparing the rotation speed difference with a preset rotation speed difference threshold;

[0020] If the speed difference is greater than the speed difference threshold, the target condensing fan is controlled to operate at the target limit speed, and the operating frequency of the compressor in the air conditioner is reduced to adjust the condensing pressure.

[0021] In a possible implementation manner, after comparing the rotation speed difference with a preset rotation speed difference threshold, the method further includes:

[0022] If the speed difference is greater than the speed difference threshold, the condensing fan is controlled to operate at the target limit speed, and the opening of the expansion valve in the air conditioner is increased to adjust the condensing pressure.

[0023] In a possible implementation, after determining whether the target adjustment speed is a normal operating speed according to the condensing pressure, the method further includes:

[0024] If the target adjustment speed is an abnormal operating speed, and the target pressure interval to which the condensing pressure belongs is a preset low pressure interval, turning off the target condensing fan;

[0025] According to the fan speed, the speed of the condensing fans in the air conditioner other than the target condensing fan is adjusted.

[0026] In a possible implementation, before determining the target adjustment speed according to the condensing pressure and the fan speed, the method further includes:

[0027] Determining whether the target condensing fan is turned on according to the fan speed;

[0028] If the target condensing fan is not turned on, the outdoor ambient temperature is calculated according to the condensing pressure of the air conditioner, and the outdoor ambient temperature is compared with a preset temperature threshold. If the outdoor ambient temperature is less than or equal to the temperature threshold, the target condensing fan is turned on, and the step of determining a target adjustment speed according to the condensing pressure and the fan speed is performed;

[0029] If the target condensing fan is turned on, the condensing pressure of the air conditioner is compared with a preset pressure threshold. If the condensing pressure is less than or equal to the pressure threshold within a preset time period, the step of determining the target adjustment speed based on the condensing pressure and the fan speed is executed.

[0030] In a second aspect, the present application provides a condensing fan control device, the condensing fan control device comprising:

[0031] An acquisition unit, used to acquire a condensing pressure of the air conditioner and a fan speed of a target condensing fan in the air conditioner;

[0032] A determination unit, configured to determine a target adjustment speed according to the condensing pressure and the fan speed;

[0033] A judging unit, configured to judge whether the target adjustment speed is a normal working speed according to the condensing pressure;

[0034] The control unit is used to control the target condensing fan in the air conditioner to operate according to the target adjustment speed if the target adjustment speed is a normal working speed, so as to adjust the condensing pressure.

[0035] In a possible implementation manner, the determining unit is further configured to:

[0036] Determine a target pressure interval to which the condensing pressure belongs;

[0037] The target adjustment speed is calculated according to the speed adjustment value corresponding to the target pressure interval and the fan speed.

[0038] In a possible implementation manner, the judging unit is further configured to:

[0039] Acquire a target pressure interval to which the condensing pressure belongs, and a target limit speed corresponding to the target pressure interval;

[0040] If the target pressure interval is a preset high pressure interval, and the target adjustment speed is less than the target limit speed, then determining that the target adjustment speed is a normal working speed;

[0041] If the target pressure interval is a preset low pressure interval, and the target adjustment speed is greater than the target limit speed, it is determined that the target adjustment speed is a normal operating speed.

[0042] In a possible implementation manner, the judging unit is further configured to:

[0043] If the target adjustment speed is an abnormal operating speed, and the target pressure interval to which the condensing pressure belongs is a preset low pressure interval, then obtaining a target limit speed corresponding to the target adjustment speed;

[0044] calculating a speed difference between the target adjusted speed and the target limit speed;

[0045] comparing the rotation speed difference with a preset rotation speed difference threshold;

[0046] If the speed difference is greater than the speed difference threshold, the target condensing fan is controlled to operate at the target limit speed, and the operating frequency of the compressor in the air conditioner is reduced to adjust the condensing pressure.

[0047] In a possible implementation manner, the judging unit is further configured to:

[0048] If the speed difference is greater than the speed difference threshold, the condensing fan is controlled to operate at the target limit speed, and the opening of the expansion valve in the air conditioner is increased to adjust the condensing pressure.

[0049] In a possible implementation manner, the judging unit is further configured to:

[0050] If the target adjustment speed is an abnormal operating speed, and the target pressure interval to which the condensing pressure belongs is a preset low pressure interval, turning off the target condensing fan;

[0051] According to the fan speed, the speed of the condensing fans in the air conditioner other than the target condensing fan is adjusted.

[0052] In a possible implementation manner, the determining unit is further configured to:

[0053] Determining whether the target condensing fan is turned on according to the fan speed;

[0054] If the target condensing fan is not turned on, the outdoor ambient temperature is calculated according to the condensing pressure of the air conditioner, and the outdoor ambient temperature is compared with a preset temperature threshold. If the outdoor ambient temperature is less than or equal to the temperature threshold, the target condensing fan is turned on, and the step of determining a target adjustment speed according to the condensing pressure and the fan speed is performed;

[0055] If the target condensing fan is turned on, the condensing pressure of the air conditioner is compared with a preset pressure threshold. If the condensing pressure is less than or equal to the pressure threshold within a preset time period, the step of determining the target adjustment speed based on the condensing pressure and the fan speed is executed.

[0056] In a third aspect, the present application also provides an air conditioner, comprising a processor and a memory, wherein the memory stores a computer program, and when the processor calls the computer program in the memory, it executes the steps of any condensing fan control method provided in the present application.

[0057] In a fourth aspect, the present application also provides a readable storage medium on which a computer program is stored, and the computer program is loaded by a processor to execute the steps in the condensing fan control method.

[0058] In summary, the condensing fan control method provided by the present application includes: obtaining the condensing pressure of the air conditioner and the fan speed of the target condensing fan in the air conditioner; determining the target adjustment speed according to the condensing pressure and the fan speed; judging whether the target adjustment speed is the normal working speed according to the condensing pressure; if the target adjustment speed is the normal working speed, controlling the target condensing fan in the air conditioner to work according to the target adjustment speed to adjust the condensing pressure. It can be seen that the condensing fan control method provided by the embodiment of the present application adjusts the condensing pressure of the air conditioner by changing the fan speed, thereby avoiding the situation where the condensing pressure drops due to the low outside temperature, thereby affecting the reliability of the air conditioner. And when adjusting the fan speed, first judge whether the adjusted target adjustment speed will affect the normal operation of the air conditioner. If the target adjustment speed does not affect the normal operation of the air conditioner, the reliability is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0060] Figure 1 It is a schematic diagram of an application scenario of a condensing fan control system provided in an embodiment of the present application;

[0061] Figure 2 It is a flow chart of a condensing fan control method provided in an embodiment of the present application;

[0062] Figure 3 It is a flow chart of a condensing fan control method when the air conditioner provided in the embodiment of the present application includes multiple condensing fans;

[0063] Figure 4 It is a schematic diagram of a flow chart for determining whether a target condensing fan is turned on, provided in an embodiment of the present application;

[0064] Figure 5 is a structural schematic diagram of an air conditioner provided in an embodiment of the present application;

[0065] Figure 6 is a schematic structural diagram of an embodiment of a condensing fan control device provided in an embodiment of the present application;

[0066] Figure 7 It is a schematic diagram of the structure of an embodiment of the air conditioner provided in the embodiments of the present application. DETAILED DESCRIPTION

[0067] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0068] In the description of the embodiments of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0069] In order to enable any person skilled in the art to implement and use the present application, the following description is provided. In the following description, details are listed for the purpose of explanation. It should be understood that those of ordinary skill in the art can recognize that the present application can also be implemented without using these specific details. In other examples, the known process will not be elaborated in detail to avoid unnecessary details that make the description of the present application embodiment obscure. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the widest range of principles and features disclosed in accordance with the embodiments of the present application.

[0070] The embodiments of the present application provide a condensing fan control method, device, air conditioner and readable storage medium. The condensing fan control device can be integrated in the air conditioner, and the air conditioner can be operated in a single operation mode or in a device cluster mode, for example, the air conditioner can be a multi-split air conditioner.

[0071] The executor of the condensing fan control method of the embodiment of the present application can be the condensing fan control device provided in the embodiment of the present application, or it can be an air conditioner. The air conditioner will be used as an example of the executor for explanation hereinafter. It should be noted that the example of the air conditioner as the executor is only for the convenience of understanding and cannot be used as a limitation of the present application.

[0072] See also Figure 1 , Figure 1 1 is a schematic diagram of a condensing fan control system provided in an embodiment of the present application. The condensing fan control system may include an air conditioner 100, in which a condensing fan control device is integrated.

[0073] In addition, if Figure 1 As shown, the condensing fan control system may further include a memory 200 for storing data.

[0074] It should be noted that Figure 1 The scenario diagram of the condensing fan control system shown is only an example. The condensing fan control system and the scenario described in the embodiment of the present application are intended to more clearly illustrate the technical solution of the embodiment of the present application, and do not constitute a limitation on the technical solution provided in the embodiment of the present application. A person of ordinary skill in the art can know that with the evolution of the condensing fan control system and the emergence of new business scenarios, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

[0075] Reference Figure 2 , Figure 2201 to 204, wherein:

[0076] 201. Obtain a condensing pressure of an air conditioner and a fan speed of a target condensing fan in the air conditioner.

[0077] When the air conditioner executes the condensing fan control method provided in the embodiment of the present application, the condensing pressure can be obtained through the pressure sensor arranged inside. The condensing pressure has a very obvious effect on the stability of the air conditioner. When the condensing pressure is too low, the suction pressure of the air conditioner is low, which eventually causes the evaporator to freeze. In addition, too low a condensing pressure will cause the evaporation temperature to be too low, which will cause the wax components in the lubricating oil to precipitate, reducing the lubrication effect of the compressor, so the reliability of the compressor will also be affected. When the condensing pressure is too high, the compressor load is high, which may eventually cause the compressor to burn out, or trigger a high-pressure alarm to cause shutdown. Therefore, inappropriate condensing pressure will have a great impact on the reliability of the air conditioner.

[0078] The condensing pressure is affected by the ambient temperature. When the ambient temperature is low, the heat exchange capacity of the condenser in the air conditioner will be greatly surplus, which will lead to too low condensing pressure. Therefore, in order to ensure that the reliability of the air conditioner is not affected when the ambient temperature is low, the operating parameters of the air conditioner need to be adjusted according to the condensing pressure.

[0079] In some embodiments, there is only one condensing fan in the air conditioner, and the target condensing fan refers to the condensing fan. The air conditioner can detect the fan speed of the target condensing fan through a built-in speed detection device. It should be noted that the fan speed can be the speed at a point in time or the speed within a period of time. For example, the air conditioner can detect the speed of the target condensing fan at 11:00 and set the speed detected at this time point as the fan speed. Alternatively, the air conditioner can also detect the speed of the target condensing fan at regular intervals from 11:00 to 11:05, and then set all speeds detected within this time period as the fan speed.

[0080] In other embodiments, the air conditioner may further include multiple condensing fans, for example, the air conditioner may be a three-fan air conditioner or a dual-fan air conditioner. In this case, the target condensing fan refers to one of the multiple condensing fans. Similarly, the fan speed may be a speed at a point in time or a speed over a period of time, which will not be described in detail.

[0081] 202. Determine a target adjustment speed according to the condensing pressure and the fan speed.

[0082] The target adjustment speed refers to the target speed calculated based on the condensing pressure and the fan speed. The target adjustment speed can be greater than the fan speed, or less than or equal to the fan speed. For example, when the condensing pressure will not cause the evaporator to freeze and the compressor to burn out, that is, when the condensing pressure detected by the air conditioner is a safe condensing pressure, the target adjustment speed is equal to the fan speed, and the air conditioner does not need to adjust the fan speed of the target condensing fan. When the outdoor temperature is low and the heat exchange capacity of the condenser is in excess, the condensing pressure is too low, and the speed of the target condensing fan needs to be reduced to reduce the heat exchange capacity and increase the condensing pressure. When the condensing pressure is too high, the speed of the target condensing fan needs to be increased to increase the heat exchange capacity and reduce the condensing pressure.

[0083] The air conditioner can calculate the target adjustment speed according to the preset adjustment speed corresponding to the condensing pressure and the fan speed. In some embodiments, a different preset adjustment speed can be set for each condensing pressure. For example, in the unsafe condensing pressure range, for the condensing pressure a1, it can correspond to the preset adjustment speed b1, and for the condensing pressure a2 less than a1, since it is more likely to affect the reliability of the compressor, a2 can correspond to the preset adjustment speed b2 greater than b1.

[0084] In other embodiments, in order to reduce the amount of data stored in the storage space, the preset adjustment speed may be determined according to the pressure interval that the condensing pressure falls into. In this case, determining the target adjustment speed according to the condensing pressure and the fan speed includes:

[0085] (1.1) Determine the target pressure range to which the condensing pressure belongs.

[0086] The target pressure interval is one of a plurality of pre-divided pressure intervals. Exemplarily, a plurality of pressure intervals can be obtained by pre-dividing according to the safety level of the condensing pressure. For example, five pressure intervals c1-c5 can be pre-divided, where c1 represents that the condensing pressure is too low. When the condensing pressure of the air conditioner is within c1, the air conditioner will not work; c2 represents that the condensing pressure is relatively low. When the condensing pressure of the air conditioner is within c2, the air conditioner can work normally, but the condensing pressure at this time may affect the reliability of the compressor; c3 represents that the condensing pressure belongs to the safe condensing pressure, the air conditioner can work normally, and the reliability of the components inside the air conditioner will not be affected; c4 represents that the condensing pressure is relatively high. When the condensing pressure of the air conditioner is within c4, the air conditioner can work normally, but the condensing pressure at this time may affect the reliability of the compressor; c5 represents that the condensing pressure is too high. When the condensing pressure of the air conditioner is within c5, the air conditioner will not work due to triggering a high pressure alarm or other reasons.

[0087] It should be noted that the pre-division method in the embodiment of the present application is only for the convenience of explanation and should not be construed as a limitation to the present application.

[0088] (1.2) Calculate the target adjustment speed based on the speed adjustment value corresponding to the target pressure range and the fan speed.

[0089] The speed adjustment value refers to the preset adjustment speed associated with the target pressure interval. Continuing with the example in step (1.1), during pre-division, a preset adjustment speed can be associated with each pressure interval obtained by the division, and the preset adjustment speeds associated with different pressure intervals are different. For example, for c1 and c2, since the condensing pressure in c1 is more likely to affect the reliability of the compressor than the condensing pressure in c2, the absolute value of the preset adjustment speed associated with c1 is larger than the absolute value of the preset adjustment speed associated with c2. For example, the preset adjustment speed associated with c1 can be -100 rpm, and the preset adjustment speed associated with c2 can be -80 rpm, where -100 rpm and -80 rpm represent reducing the fan speed by 100 rpm and 80 rpm, respectively. If the target pressure interval is c1, the speed adjustment value is the preset adjustment speed associated with c1 -100 rpm, so the target adjustment speed refers to the speed obtained by subtracting 100 rpm from the fan speed. For c4 and c5, since the condensing pressure in c5 is more likely to affect the reliability of the compressor than the condensing pressure in c4, the preset adjustment speed associated with c5 is greater than the preset adjustment speed associated with c4, for example, the preset adjustment speed associated with c5 may be 100 rpm, and the preset adjustment speed associated with c4 may be 80 rpm. If the target pressure interval is c5, the speed adjustment value is the preset adjustment speed 100 rpm associated with c5, so the target adjustment speed refers to the speed obtained by adding 100 rpm to the fan speed.

[0090] In step 202 and steps (1.1) to (1.2), the air conditioner may only calculate the target adjustment speed in a calculation space, such as a calculation chip, without actually adjusting the speed of the target condensing fan, that is, the target condensing fan still operates at the fan speed. In addition, the air conditioner may also adjust the speed of the target condensing fan from the fan speed to the target adjustment speed after calculating the target adjustment speed.

[0091] 203. Determine, based on the condensing pressure, whether the target adjustment speed is a normal operating speed.

[0092] Normal operating speed refers to the speed of the target condensing fan when it is operating normally. If the speed of the target condensing fan is too high, the load of the motor in the target condensing fan may exceed the maximum load that the motor can bear, and long-term operation at a high load may cause damage to the target condensing fan. If the speed of the target condensing fan is too low, if the target condensing fan operates at this speed, the current in the air conditioner will impact the control chip of the air conditioner. Therefore, in order to further maintain the reliability of the air conditioner while changing the condensing pressure, it is necessary to determine whether the reliability of the air conditioner will be affected when the target condensing fan operates at the target adjustment speed.

[0093] Specifically, the air conditioner can determine whether the target adjustment speed is a normal working speed according to the speed threshold corresponding to the target pressure interval. At this time, judging whether the target adjustment speed is a normal working speed according to the condensing pressure includes:

[0094] (2.1) Obtaining the target pressure range to which the condensing pressure belongs and the target limit speed corresponding to the target pressure range.

[0095] The target limit speed refers to the limit value of the speed when the target condensing fan is working normally. It can be understood that the target limit speed is one of the maximum speed and the minimum speed that can be achieved when the target condensing fan is working normally. The maximum speed and the minimum speed are both preset values ​​in the storage space before leaving the factory.

[0096] When the target pressure interval is different, the corresponding target speed limit may be different. Continuing with the example in step (1.1), if the target pressure interval is c1 or c2, since the speed adjustment values ​​corresponding to the target pressure interval are all negative values, that is, the fan speed is reduced, the target adjustment speed after the reduction may be lower than the minimum speed that the target condensing fan can reach when it is working normally. Therefore, the target speed limit refers to the minimum speed that the target condensing fan can reach when it is working normally. When the target pressure interval is c4 or c5, since the speed adjustment values ​​corresponding to the target pressure interval are all positive values, that is, the fan speed is increased, the target adjustment speed after the increase may be higher than the maximum speed that the target condensing fan can reach when it is working normally. Therefore, the target speed limit refers to the maximum speed that the target condensing fan can reach when it is working normally.

[0097] (2.21) If the target pressure interval is a preset high pressure interval, and the target adjusted speed is less than the target limit speed, it is determined that the target adjusted speed is a normal operating speed.

[0098] The high pressure interval refers to the interval in which the condensing pressure is greater than the safe condensing pressure. Taking the example in step (1.1), c4 and c5 are both high pressure intervals. It can be understood that if the target pressure interval is a high pressure interval, and the target adjustment speed is less than the target limit speed, in this case, the target adjustment speed is less than the maximum speed that can be achieved when the target condensing fan is working normally, then the target adjustment speed is the normal working speed.

[0099] (2.22) If the target pressure interval is a preset low pressure interval, and the target adjusted speed is greater than the target limit speed, it is determined that the target adjusted speed is a normal operating speed.

[0100] The low pressure interval refers to the interval in which the condensing pressure is less than the safe condensing pressure. Taking the example in step (1.1), c1 and c2 are both low pressure intervals. It can be understood that if the target pressure interval is a low pressure interval, and the target adjustment speed is greater than the target limit speed, in this example, the target adjustment speed is greater than the minimum speed that can be achieved when the target condensing fan is working normally, then the target adjustment speed is the normal working speed.

[0101] In some embodiments, if the target adjustment speed is not the normal operating speed, and the target pressure interval to which the condensing pressure belongs is a preset low pressure interval, the air conditioner can turn off the target condensing fan to avoid the impact of current on the control chip, while reducing the heat exchange capacity and increasing the condensing pressure.

[0102] In some embodiments, if the target adjustment speed is not the normal operating speed, the air conditioner can simultaneously adjust the operating frequency and speed of the compressor to adjust the condensing pressure. At this time, after judging whether the target adjustment speed is the normal operating speed according to the condensing pressure, the method further includes:

[0103] (3.1) If the target adjustment speed is an abnormal operating speed, and the target pressure interval to which the condensing pressure belongs is a preset low pressure interval, then the target limit speed corresponding to the target adjustment speed is obtained.

[0104] The abnormal operating speed refers to the speed of the target condensing fan when it is not working normally. If the target adjustment speed is higher than the maximum speed that can be reached when the target condensing fan is working normally, or lower than the minimum speed that can be reached when the target condensing fan is working normally, then the target adjustment speed is the abnormal operating speed.

[0105] (3.2) Calculating a speed difference between the target adjusted speed and the target limit speed.

[0106] (3.3) Compare the speed difference with a preset speed difference threshold.

[0107] (3.4) If the speed difference is greater than the speed difference threshold, the target condensing fan is controlled to operate at the target limit speed, and the operating frequency of the compressor in the air conditioner is reduced to adjust the condensing pressure.

[0108] The purpose of calculating the speed difference is to evaluate the gap between the target adjustment speed and the target limit speed. If the gap between the target adjustment speed and the target limit speed is too large, that is, the speed difference is too large, it means that the preset speed adjustment step cannot achieve the adjustment of the condensing pressure under the premise of ensuring the reliability of the air conditioner. Therefore, the speed of the target condensing fan can be first adjusted to the minimum speed that can be achieved when the target condensing fan works normally, that is, the target limit speed. At this time, the condensing pressure of the air conditioner has not been adjusted compared to the target adjustment speed. In order to compensate for the unadjusted part, the operating frequency of the compressor can be reduced at the same time to further adjust the condensing pressure and achieve the same effect as the target adjustment speed.

[0109] Specifically, the air conditioner can reduce the operating frequency of the compressor in a variety of ways. For example, the air conditioner can match the corresponding frequency adjustment value according to the speed difference, or the air conditioner can also adjust the operating frequency of the compressor according to a fixed preset adjustment value.

[0110] In other embodiments, the opening of the expansion valve may be adjusted to compensate for the unadjusted portion. In this case, after comparing the rotation speed difference with a preset rotation speed difference threshold, the method further includes:

[0111] (3.41) If the speed difference is greater than the speed difference threshold, the condensing fan is controlled to operate at the target limit speed, and the opening of the expansion valve in the air conditioner is increased to adjust the condensing pressure.

[0112] Similarly, the speed of the target condensing fan can be first adjusted to the minimum speed that can be achieved when the target condensing fan is working normally, that is, the target limit speed. At this time, the condensing pressure of the air conditioner has not been adjusted compared to the target adjustment speed. In order to compensate for the unadjusted part, the opening of the expansion valve can be increased at the same time to further adjust the condensing pressure to achieve the same effect as the target adjustment speed.

[0113] Specifically, the air conditioner can increase the opening of the expansion valve in a variety of ways. For example, the air conditioner can match the corresponding opening adjustment value according to the speed difference, or the air conditioner can also adjust the opening of the expansion valve according to a fixed preset adjustment value.

[0114] 204. If the target adjustment speed is a normal operating speed, the target condensing fan in the air conditioner is controlled to operate according to the target adjustment speed to adjust the condensing pressure.

[0115] If, in step 202 and steps (1.1)-(1.2), the air conditioner only calculates the target adjustment speed in a calculation space, such as a calculation chip, but does not actually adjust the speed of the target condensing fan, that is, the target condensing fan still keeps operating at the fan speed, then when executing step 204, the air conditioner can control the target condensing fan to operate at the target adjustment speed. On the contrary, if, in step 202 and steps (1.1)-(1.2), the air conditioner has adjusted the speed of the target condensing fan from the fan speed to the target adjustment speed after calculating the target adjustment speed, then when executing step 204, the air conditioner can continue to keep the target condensing fan operating at the target adjustment speed.

[0116] After the target condensing fan is controlled to work according to the target speed adjustment, the air conditioner can repeat the above steps at regular intervals to ensure that the condensing pressure of the air conditioner remains within a safe range. It can be seen from steps (1.1) to (1.2) that by setting a suitable speed adjustment value to fine-tune the speed of the target condensing fan, a large fluctuation of the condensing pressure is avoided during the adjustment process, thereby ensuring the stability of the air conditioner operation.

[0117] In summary, the condensing fan control method provided in the embodiment of the present application includes: obtaining the condensing pressure of the air conditioner and the fan speed of the target condensing fan in the air conditioner; determining the target adjustment speed according to the condensing pressure and the fan speed; judging whether the target adjustment speed is the normal working speed according to the condensing pressure; if the target adjustment speed is the normal working speed, controlling the target condensing fan in the air conditioner to work according to the target adjustment speed to adjust the condensing pressure. It can be seen that the condensing fan control method provided in the embodiment of the present application adjusts the condensing pressure of the air conditioner by changing the fan speed, thereby avoiding the situation where the condensing pressure drops due to the low outside temperature, thereby affecting the reliability of the air conditioner. And when adjusting the fan speed, first judge whether the adjusted target adjustment speed will affect the normal operation of the air conditioner. If the target adjustment speed does not affect the normal operation of the air conditioner, the reliability is higher.

[0118] In some embodiments, the air conditioner includes a plurality of condensing fans, and thus the target condensing fan is one of the plurality of condensing fans. Figure 3 At this time, after judging whether the target adjustment speed is a normal working speed according to the condensing pressure, the method further includes:

[0119] 301. If the target adjustment speed is an abnormal operating speed, and the target pressure interval to which the condensing pressure belongs is a preset low pressure interval, then turning off the target condensing fan.

[0120] If the target adjustment speed is an abnormal operating speed and the target pressure interval to which the condensing pressure belongs is a low pressure interval, it means that the target adjustment speed is lower than the minimum speed that can be reached when the target condensing fan is working normally. Therefore, in order to avoid the current in the air conditioner from causing impact on the components in the air conditioner, the target condensing fan can be turned off.

[0121] 302. According to the fan speed, adjust the speed of condensing fans in the air conditioner except the target condensing fan.

[0122] If the target condensing fan is turned off, the sudden change of the air volume in the air conditioner will cause a sudden change in the condensing pressure, which will have an impact on the reliability of the air conditioner. To avoid this, the air conditioner can adjust the speed of the condensing fans other than the target condensing fan while turning off the target condensing fan to maintain the stability of the air volume in the air conditioner. For example, for each condensing fan other than the target condensing fan, its current speed is increased.

[0123] On the contrary, when the target condensing fan is turned on, in order to avoid sudden changes in the air volume in the air conditioner, the speed of the condensing fans other than the target condensing fan may be adjusted to maintain the stability of the air volume in the air conditioner. For example, the current speed of each condensing fan other than the target condensing fan is reduced.

[0124] For the two situations of the target condensing fan being turned on or off, different methods can be used to determine whether to perform steps 201 to 204 to adjust the condensing pressure. Figure 4 At this time, before determining the target adjustment speed according to the condensing pressure and the fan speed, the method further includes:

[0125] 401. Determine whether the target condensing fan is turned on according to the fan speed.

[0126] The air conditioner can determine whether the target condensing fan is turned on by the fan speed. When the fan speed is 0, the target condensing fan is not turned on. When the fan speed is not 0, the target condensing fan is turned on.

[0127] 402A. If the target condensing fan is not turned on, the outdoor ambient temperature is calculated based on the condensing pressure of the air conditioner, and the outdoor ambient temperature is compared with a preset temperature threshold. If the outdoor ambient temperature is less than or equal to the temperature threshold, the target condensing fan is turned on, and the step of determining the target adjustment speed based on the condensing pressure and the fan speed is executed.

[0128] If the target condensing fan is not turned on, the air conditioner can compare the outdoor ambient temperature with the preset temperature threshold to determine whether the outdoor ambient temperature is too low. When the outdoor ambient temperature is too low, the air conditioner executes the above steps to monitor and adjust the condensing pressure in real time to avoid affecting the stability of the air conditioner. Exemplarily, the air conditioner can calculate the outdoor temperature based on the condensing pressure and a preset formula. Compared with the method of obtaining the outdoor temperature through a temperature detection component, the method in the embodiment of the present application can be applied to air conditioners that are not equipped with a temperature detection component, so the cost is lower.

[0129] If the outdoor ambient temperature is less than or equal to the temperature threshold, it means that the outdoor ambient temperature is too low, and the heat exchange capacity of the condenser in the air conditioner may be excessive, resulting in low condensing pressure. Therefore, when the air conditioner determines that the outdoor ambient temperature is less than or equal to the temperature threshold, it can turn on the target condensing fan, control the target condensing fan to operate at a preset speed, and execute steps 201-204.

[0130] 402B. If the target condensing fan is turned on, the condensing pressure of the air conditioner is compared with a preset pressure threshold. If the condensing pressure is less than or equal to the pressure threshold within a preset time period, the step of determining the target adjustment speed based on the condensing pressure and the fan speed is executed.

[0131] If the target condensing fan is already turned on, the condensing pressure within a period of time can be directly compared with the preset pressure threshold to determine whether the current condensing pressure is too low. If the current condensing pressure is too low, steps 201 to 204 need to be performed for real-time adjustment and monitoring. The reason for comparing the condensing pressure within a period of time with the pressure threshold instead of comparing the condensing pressure at a certain point in time with the pressure threshold is to avoid the condensing pressure at a certain point in time being less than or equal to the pressure threshold due to sudden changes or other external factors, thereby causing misjudgment.

[0132] In addition, the present application also provides a structure of an air conditioner. Figure 5 , Figure 5 , provides a specific structure of an air conditioner, which includes a compressor 501, a high pressure sensor 502, a condenser 503, a condensing fan 504 and an expansion valve 505, wherein the compressor 501, the high pressure sensor 502, the condenser 503 and the expansion valve 505 are connected in this way, and the condensing fan 504 is arranged relative to the condenser 503. The high pressure sensor 502 is used to detect the condensing pressure on the condenser 503 side, and the expansion valve 505 is used to adjust the condensing pressure.

[0133] In order to better implement the condensing fan control method in the embodiment of the present application, based on the condensing fan control method, a condensing fan control device is also provided in the embodiment of the present application, such as Figure 6FIG. 1 is a schematic diagram of the structure of an embodiment of a condensing fan control device in an embodiment of the present application. The condensing fan control device 600 includes:

[0134] An acquisition unit 601 is used to acquire a condensing pressure of an air conditioner and a fan speed of a target condensing fan in the air conditioner;

[0135] A determination unit 602, configured to determine a target adjustment speed according to the condensing pressure and the fan speed;

[0136] A judging unit 603 is used to judge whether the target adjustment speed is a normal working speed according to the condensing pressure;

[0137] The control unit 604 is used to control the target condensing fan in the air conditioner to operate according to the target adjustment speed if the target adjustment speed is the normal working speed, so as to adjust the condensing pressure.

[0138] In a possible implementation manner, the determining unit 602 is further configured to:

[0139] Determine a target pressure interval to which the condensing pressure belongs;

[0140] The target adjustment speed is calculated according to the speed adjustment value corresponding to the target pressure interval and the fan speed.

[0141] In a possible implementation manner, the determining unit 603 is further configured to:

[0142] Acquire a target pressure interval to which the condensing pressure belongs, and a target limit speed corresponding to the target pressure interval;

[0143] If the target pressure interval is a preset high pressure interval, and the target adjustment speed is less than the target limit speed, then determining that the target adjustment speed is a normal working speed;

[0144] If the target pressure interval is a preset low pressure interval, and the target adjustment speed is greater than the target limit speed, it is determined that the target adjustment speed is a normal operating speed.

[0145] In a possible implementation manner, the determining unit 603 is further configured to:

[0146] If the target adjustment speed is an abnormal operating speed, and the target pressure interval to which the condensing pressure belongs is a preset low pressure interval, then obtaining a target limit speed corresponding to the target adjustment speed;

[0147] calculating a speed difference between the target adjusted speed and the target limit speed;

[0148] comparing the rotation speed difference with a preset rotation speed difference threshold;

[0149] If the speed difference is greater than the speed difference threshold, the target condensing fan is controlled to operate at the target limit speed, and the operating frequency of the compressor in the air conditioner is reduced to adjust the condensing pressure.

[0150] In a possible implementation manner, the determining unit 603 is further configured to:

[0151] If the speed difference is greater than the speed difference threshold, the condensing fan is controlled to operate at the target limit speed, and the opening of the expansion valve in the air conditioner is increased to adjust the condensing pressure.

[0152] In a possible implementation manner, the determining unit 603 is further configured to:

[0153] If the target adjustment speed is an abnormal operating speed, and the target pressure interval to which the condensing pressure belongs is a preset low pressure interval, turning off the target condensing fan;

[0154] According to the fan speed, the speed of the condensing fans in the air conditioner other than the target condensing fan is adjusted.

[0155] In a possible implementation manner, the determining unit 602 is further configured to:

[0156] Determining whether the target condensing fan is turned on according to the fan speed;

[0157] If the target condensing fan is not turned on, the outdoor ambient temperature is calculated according to the condensing pressure of the air conditioner, and the outdoor ambient temperature is compared with a preset temperature threshold. If the outdoor ambient temperature is less than or equal to the temperature threshold, the target condensing fan is turned on, and the step of determining a target adjustment speed according to the condensing pressure and the fan speed is performed;

[0158] If the target condensing fan is turned on, the condensing pressure of the air conditioner is compared with a preset pressure threshold. If the condensing pressure is less than or equal to the pressure threshold within a preset time period, the step of determining the target adjustment speed based on the condensing pressure and the fan speed is executed.

[0159] In specific implementation, the above units can be implemented as independent entities, or can be arbitrarily combined to be implemented as the same or several entities. The specific implementation of the above units can refer to the previous method embodiments, which will not be repeated here.

[0160] Since the condensing fan control device can execute the steps in the condensing fan control method in any embodiment of the present application, it can achieve the beneficial effects that can be achieved by the condensing fan control method in any embodiment of the present application. Please see the previous description for details and will not be repeated here.

[0161] In addition, in order to better implement the condensing fan control method in the embodiment of the present application, based on the condensing fan control method, the embodiment of the present application also provides an air conditioner, referring to Figure 7 , Figure 7 701 is a schematic diagram of the structure of an air conditioner according to an embodiment of the present application. Specifically, the air conditioner provided in the embodiment of the present application includes a processor 701, and the processor 701 is used to implement the steps of the condensing fan control method in any embodiment when executing the computer program stored in the memory 702; or, the processor 701 is used to implement the following when executing the computer program stored in the memory 702. Figure 5 The functions of each unit in the corresponding embodiment.

[0162] Exemplarily, the computer program may be divided into one or more modules / units, one or more modules / units are stored in the memory 702, and executed by the processor 701 to complete the embodiment of the present application. One or more modules / units may be a series of computer program instruction segments that can complete specific functions, and the instruction segments are used to describe the execution process of the computer program in the computer device.

[0163] The air conditioner may include, but is not limited to, a processor 701 and a memory 702. Those skilled in the art will appreciate that the illustration is merely an example of an air conditioner and does not constitute a limitation on the air conditioner, and may include more or fewer components than those shown in the illustration, or may combine certain components, or different components, for example, the air conditioner may also include input and output devices, network access devices, buses, etc., and the processor 701, the memory 702, the input and output devices, and the network access devices, etc. are connected via a bus.

[0164] The processor 701 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of the air conditioner, and uses various interfaces and lines to connect various parts of the entire air conditioner.

[0165] The memory 702 can be used to store computer programs and / or modules. The processor 701 implements various functions of the computer device by running or executing the computer programs and / or modules stored in the memory 702 and calling the data stored in the memory 702. The memory 702 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the air conditioner (such as audio data, video data, etc.), etc. In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (FlashCard), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0166] Technicians in the relevant field can clearly understand that, for the convenience and simplicity of description, the specific working process of the condensing fan control device, air conditioner and its corresponding units described above can refer to the description of the condensing fan control method in any embodiment, and the details will not be repeated here.

[0167] A person of ordinary skill in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be completed by instructions, or by controlling related hardware through instructions. The instructions may be stored in a computer-readable storage medium and loaded and executed by a processor.

[0168] To this end, an embodiment of the present application provides a computer-readable storage medium, in which multiple instructions are stored. The instructions can be loaded by a processor to execute the steps in the condensing fan control method in any embodiment of the present application. The specific operations can refer to the description of the condensing fan control method in any embodiment, and will not be repeated here.

[0169] The computer-readable storage medium may include: a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0170] Since the instructions stored in the computer-readable storage medium can execute the steps in the condensing fan control method in any embodiment of the present application, the beneficial effects that can be achieved by the condensing fan control method in any embodiment of the present application can be achieved. Please see the previous description for details and will not be repeated here.

[0171] The above is a detailed introduction to a condensing fan control method, device, storage medium and air conditioner provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for technical personnel in this field, according to the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A method for controlling a condensing fan of an air conditioner, characterized in that: The method comprises: Acquiring a condensing pressure of an air conditioner and a fan speed of a target condensing fan in the air conditioner; Determining a target adjustment speed according to the condensing pressure and the fan speed; determining, according to the condensing pressure, whether the target adjustment speed is a normal working speed; If the target adjustment speed is a normal operating speed, controlling the target condensing fan in the air conditioner to operate according to the target adjustment speed to adjust the condensing pressure; After determining whether the target adjustment speed is a normal working speed according to the condensing pressure, the method further includes: If the target adjustment speed is an abnormal operating speed, and the target pressure interval to which the condensing pressure belongs is a preset low pressure interval, then obtaining a target limit speed corresponding to the target adjustment speed; calculating a speed difference between the target adjusted speed and the target limit speed; comparing the rotation speed difference with a preset rotation speed difference threshold; If the speed difference is greater than the speed difference threshold, the target condensing fan is controlled to operate at the target limit speed, and the operating frequency of the compressor in the air conditioner is reduced to adjust the condensing pressure.

2. The condensing fan control method according to claim 1, characterized in that: The step of determining a target adjustment speed according to the condensing pressure and the fan speed includes: Determine a target pressure interval to which the condensing pressure belongs; The target adjustment speed is calculated according to the speed adjustment value corresponding to the target pressure interval and the fan speed.

3. The condensing fan control method according to claim 1, characterized in that: The determining, based on the condensing pressure, whether the target adjustment speed is a normal operating speed includes: Acquire a target pressure interval to which the condensing pressure belongs, and a target limit speed corresponding to the target pressure interval; If the target pressure interval is a preset high pressure interval, and the target adjustment speed is less than the target limit speed, then determining that the target adjustment speed is a normal working speed; If the target pressure interval is a preset low pressure interval, and the target adjustment speed is greater than the target limit speed, it is determined that the target adjustment speed is a normal operating speed.

4. The condensing fan control method according to claim 1, characterized in that: After comparing the rotation speed difference with a preset rotation speed difference threshold, the method further includes: If the speed difference is greater than the speed difference threshold, the condensing fan is controlled to operate at the target limit speed, and the opening of the expansion valve in the air conditioner is increased to adjust the condensing pressure.

5. The condensing fan control method according to any one of claims 1 to 4, characterized in that: Before determining the target adjustment speed according to the condensing pressure and the fan speed, the method further includes: Determining whether the target condensing fan is turned on according to the fan speed; If the target condensing fan is not turned on, the outdoor ambient temperature is calculated according to the condensing pressure of the air conditioner, and the outdoor ambient temperature is compared with a preset temperature threshold. If the outdoor ambient temperature is less than or equal to the temperature threshold, the target condensing fan is turned on, and the step of determining a target adjustment speed according to the condensing pressure and the fan speed is performed; If the target condensing fan is turned on, the condensing pressure of the air conditioner is compared with a preset pressure threshold. If the condensing pressure is less than or equal to the pressure threshold within a preset time period, the step of determining the target adjustment speed based on the condensing pressure and the fan speed is executed.

6. A condensing fan control device, characterized in that: The condensing fan control device comprises: An acquisition unit, used to acquire a condensing pressure of the air conditioner and a fan speed of a target condensing fan in the air conditioner; A determination unit, configured to determine a target adjustment speed according to the condensing pressure and the fan speed; A judging unit, configured to judge whether the target adjustment speed is a normal working speed according to the condensing pressure; a control unit, configured to control the target condensing fan in the air conditioner to operate according to the target adjustment speed to adjust the condensing pressure if the target adjustment speed is a normal operating speed; The judgment unit is used to obtain the target limit speed corresponding to the target adjustment speed if the target adjustment speed is an abnormal operating speed and the target pressure interval to which the condensing pressure belongs is a preset low pressure interval; calculate the speed difference between the target adjustment speed and the target limit speed; compare the speed difference with a preset speed difference threshold; if the speed difference is greater than the speed difference threshold, control the target condensing fan to operate at the target limit speed, and reduce the operating frequency of the compressor in the air conditioner to adjust the condensing pressure.

7. An air conditioner, characterized in that: It comprises a processor and a memory, wherein a computer program is stored in the memory, and when the processor calls the computer program in the memory, the condensing fan control method according to any one of claims 1 to 5 is executed.

8. A readable storage medium, characterized in that: A computer program is stored thereon, and the computer program is loaded by a processor to execute the steps in the condensing fan control method according to any one of claims 1 to 5.

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