Heat dissipation control method of air conditioner frequency converter, air conditioner and storage medium

Abstract

The invention is suitable for the technical field of air conditioner control, and provides a heat dissipation control method of an air conditioner frequency converter, an air conditioner and a storage medium. The method comprises the steps that after a compressor of the air conditioner enters a self-control mode, the outdoor environment temperature of the air conditioner is detected firstly, and if the outdoor environment temperature is larger than a preset temperature value, the refrigeration requirement of the air conditioner is obtained; then, heat dissipation equipment of the frequency converter is controlled according to the refrigeration requirement of the air conditioner; and when the refrigeration demand is greater than the preset value, the heat dissipation equipment is started so as to achieve the purpose of heat dissipation of the frequency converter. After the compressor enters the self-control mode, the temperature change of the frequency converter is pre-judged in advance according to the refrigeration requirement, then the heat dissipation equipment is controlled, the frequency converter is kept running at the normal temperature, abnormal running of the frequency converter caused by untimely cooling is avoided, and abnormal running of an air conditioner caused by abnormal temperature of the frequency converter is reduced.

Description

Technical Field

[0001] This application belongs to the technical field of air conditioner control, and particularly relates to a heat dissipation control method, an air conditioner and a storage medium for an air conditioner inverter. Background Art

[0002] An air conditioner is a device used to adjust temperature, humidity, air flow and air quality, and is widely used in homes, offices, commercial places and industrial environments. An air conditioner includes an inverter and a compressor, etc. The inverter controls the motor speed of the compressor by adjusting the power frequency to adjust the cooling or heating capacity. If the inverter overheats, the operation of the entire air conditioner will be affected.

[0003] Currently, it is generally determined whether to dissipate heat from the inverter by detecting the temperature of the inverter. Specifically, after the inverter shows an overheating phenomenon, heat dissipation treatment is carried out on the inverter. When this method dissipates heat from the inverter, the inverter is already in a state of relatively high temperature. In this case, if the heat dissipation is not timely, it is easy to cause the temperature of the inverter to be too high and affect the operation of the air conditioner. Summary of the Invention

[0004] The embodiments of this application provide a heat dissipation control method, an air conditioner and a storage medium for an air conditioner inverter, which can solve the problem that the operation of the air conditioner is affected due to untimely heat dissipation of the inverter.

[0005] In a first aspect, the embodiments of this application provide a heat dissipation control method for an air conditioner inverter, including:

[0006] In response to the compressor of the air conditioner entering the self-control mode, the outdoor ambient temperature is obtained in real time;

[0007] When the outdoor ambient temperature is greater than a first preset temperature value, the cooling demand of the air conditioner is obtained;

[0008] When the cooling demand is greater than a preset value, the heat dissipation device is controlled to be turned on, where the heat dissipation device is used to dissipate heat from the inverter of the air conditioner.

[0009] In a possible implementation manner of the first aspect, after obtaining the cooling demand of the air conditioner, the method further includes:

[0010] When the cooling demand is less than or equal to the preset value, the first temperature value of the inverter is obtained;

[0011] When the first temperature value is greater than a second preset temperature value, the heat dissipation device is controlled to be turned on.

[0012] In a possible implementation manner of the first aspect, after obtaining the first temperature value of the inverter, the method further includes:

[0013] When the first temperature value is less than or equal to the second preset temperature value, obtain the first temperature rising rate of the frequency converter within the first preset time period;

[0014] When the first temperature rising rate is greater than the preset temperature rising rate value, control the heat dissipation device to turn on.

[0015] In a possible implementation manner of the first aspect, after obtaining the outdoor ambient temperature in real time, the method further includes:

[0016] When the outdoor ambient temperature is less than or equal to the first preset temperature value, obtain the second temperature value of the frequency converter;

[0017] When the second temperature value is greater than the second preset temperature value, control the heat dissipation device to turn on.

[0018] In a possible implementation manner of the first aspect, after obtaining the second temperature value of the frequency converter, the method further includes:

[0019] When the second temperature value is less than or equal to the second preset temperature value, obtain the second temperature rising rate of the frequency converter within the second preset time period;

[0020] When the second temperature rising rate is greater than the preset temperature rising rate value, control the heat dissipation device to turn on.

[0021] In a possible implementation manner of the first aspect, the method further includes:

[0022] After the heat dissipation device is turned on and operates for the third preset time period, obtain the third temperature value of the frequency converter;

[0023] When the third temperature value is greater than the third preset temperature value, control the frequency converter to turn off.

[0024] In a possible implementation manner of the first aspect, after obtaining the third temperature value of the frequency converter, the method further includes:

[0025] When the third temperature value is less than or equal to the third preset temperature value and the third temperature value is less than or equal to the fourth preset temperature value, turn off the heat dissipation device.

[0026] In a possible implementation manner of the first aspect, after obtaining the third temperature value of the frequency converter, the method further includes:

[0027] When the third temperature value is less than or equal to the third preset temperature value and the third temperature value is greater than the fourth preset temperature value, keep the heat dissipation device turned on.

[0028] Second aspect, embodiments of the present application provide an air conditioner, including:

[0029] A temperature acquisition module, configured to, in response to the compressor of the air conditioner entering the self-control mode, acquire the outdoor ambient temperature in real time;

[0030] A demand determination module, configured to, when the outdoor ambient temperature is greater than a first preset temperature value, acquire the cooling demand of the air conditioner;

[0031] A control module, configured to, when the cooling demand is greater than a preset value, control the heat dissipation device to turn on, where the heat dissipation device is used to dissipate heat from the frequency converter of the air conditioner.

[0032] In a possible implementation manner of the second aspect, the control module is further configured to:

[0033] When the cooling demand is less than or equal to the preset value, acquire a first temperature value of the frequency converter;

[0034] When the first temperature value is greater than a second preset temperature value, control the heat dissipation device to turn on.

[0035] In a possible implementation manner of the second aspect, the control module is further configured to:

[0036] When the first temperature value is less than or equal to the second preset temperature value, acquire a first temperature rising rate of the frequency converter within a first preset duration;

[0037] When the first temperature rising rate is greater than a preset temperature rising rate value, control the heat dissipation device to turn on.

[0038] In a possible implementation manner of the second aspect, the above air conditioner further includes:

[0039] A first frequency converter temperature acquisition module, configured to, when the outdoor ambient temperature is less than or equal to the first preset temperature value, acquire a second temperature value of the frequency converter;

[0040] The control module is further configured to, when the second temperature value is greater than a second preset temperature value, control the heat dissipation device to turn on.

[0041] In a possible implementation manner of the second aspect, the control module is further configured to:

[0042] When the second temperature value is less than or equal to the second preset temperature value, acquire a second temperature rising rate of the frequency converter within a second preset duration;

[0043] When the second temperature rising rate is greater than a preset temperature rising rate value, control the heat dissipation device to turn on.

[0044] In a possible implementation of the second aspect, the above air conditioner further includes:

[0045] A second frequency converter temperature acquisition module, configured to acquire a third temperature value of the frequency converter after the heat dissipation device is turned on and operates for a third preset duration;

[0046] The control module is further configured to control the frequency converter to turn off when the third temperature value is greater than a third preset temperature value.

[0047] In a possible implementation of the second aspect, the control module is further configured to:

[0048] Turn off the heat dissipation device when the third temperature value is less than or equal to the third preset temperature value and the third temperature value is less than or equal to a fourth preset temperature value.

[0049] In a possible implementation of the second aspect, the control module is further configured to:

[0050] Keep the heat dissipation device turned on when the third temperature value is less than or equal to the third preset temperature value and the third temperature value is greater than the fourth preset temperature value.

[0051] In a third aspect, an embodiment of the present application provides an air conditioner, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, where when the processor executes the computer program, it implements the heat dissipation control method of the air conditioner frequency converter described in any one of the above first aspects.

[0052] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, it implements the heat dissipation control method of the air conditioner frequency converter described in any one of the above first aspects.

[0053] In a fifth aspect, an embodiment of the present application provides a computer program product, which when running on a terminal device, causes the terminal device to execute the heat dissipation control method of the air conditioner frequency converter described in any one of the above first aspects.

[0054] The beneficial effects of the first aspect of this application compared with the prior art are as follows: After the compressor of the air conditioner enters the self-control mode, the outdoor ambient temperature is obtained in real time to determine whether the air conditioner is in a high-temperature environment. If the outdoor ambient temperature is greater than the first preset temperature value, it indicates that the outdoor side of the air conditioner is in a relatively high-temperature environment. At this time, if the air conditioner is about to operate at high load, the frequency converter also needs to operate at high speed, then the frequency converter will heat up quickly, and due to the influence of the high-temperature environment, it may cause the frequency converter to dissipate heat in a timely manner. In order to ensure that the frequency converter can operate at a normal temperature, the refrigeration demand of the air conditioner can be obtained in advance, and then the heat dissipation device of the frequency converter can be controlled according to the refrigeration demand of the air conditioner; when the refrigeration demand is greater than the preset value, it indicates that the air conditioner will operate at high load for a relatively long period of time, the compressor will be in the high-frequency working range, the frequency converter will continuously output a large current, and the temperature rise will be relatively fast. At this time, it can be determined that the frequency converter will have a relatively high temperature rise risk, and the heat dissipation device of the frequency converter can be directly predicted to be turned on, and forced convective heat transfer can be carried out in advance to prevent the temperature of the frequency converter from getting out of control, thereby achieving the purpose of dissipating heat from the frequency converter.

[0055] It can be understood that the beneficial effects of the second to fifth aspects can refer to the relevant descriptions in the first aspect above, and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0057] Figure 1 It is a schematic flowchart of a method for controlling the heat dissipation of an air conditioner frequency converter provided by an embodiment of the present application;

[0058] Figure 2 It is a schematic flowchart of a method for controlling the heat dissipation of a frequency converter when the refrigeration demand is less than the preset value provided by an embodiment of the present application;

[0059] Figure 3 It is a schematic flowchart of a method for controlling a heat dissipation device according to the temperature of a frequency converter provided by an embodiment of the present application;

[0060] Figure 4 It is a schematic flowchart of a method for controlling a heat dissipation device when the outdoor ambient temperature is not high provided by an embodiment of the present application;

[0061] Figure 5 It is a schematic flowchart of a method for controlling the heat dissipation of an air conditioner frequency converter provided by another embodiment of the present application;

[0062] Figure 6 is a schematic structural diagram of an air conditioner provided by an embodiment of the present application;

[0063] Figure 7 is a schematic structural diagram of an air conditioner provided by another embodiment of the present application. Specific embodiments

[0064] When used in the description of the present application specification and the appended claims, the term "comprising" indicates the presence of the described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

[0065] It should also be understood that the term "and / or" used in the description of the present application specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0066] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance.

[0067] The reference to "an embodiment" or "some embodiments" etc. described in the present application specification means that a specific feature, structure or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, the statements "in an embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments" etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways.

[0068] An air conditioner generally includes a compressor, an inverter and a condenser, etc. The inverter controls the motor speed of the compressor by adjusting the power frequency, thereby adjusting the cooling or heating capacity. The compressor is responsible for compressing the refrigerant, pushing the refrigerant to circulate in the system, and realizing cooling or heating. The condenser is mainly responsible for converting the refrigerant from a gaseous state to a liquid state and releasing heat.

[0069] Currently, for outdoor air conditioners, the inverter generally uses natural wind for heat dissipation; or the inverter and the condenser usually share a heat dissipation duct for heat dissipation through the heat dissipation duct. The existing heat dissipation method of the inverter is easily affected by the high temperature of the condenser and the uneven natural convection heat dissipation, resulting in poor heat dissipation effect of the inverter.

[0070] The essence of the temperature rise of the frequency converter is that the ambient temperature is relatively high or the refrigeration demand is relatively high (which can also be said to be a relatively high load). For an air conditioner equipped with a heat dissipation device (such as a cooling fan), the start and stop of the heat dissipation device are also controlled by detecting the temperature of the frequency converter. If the temperature of the frequency converter is relatively high, the heat dissipation device is turned on to dissipate heat from the frequency converter. However, the method of controlling the heat dissipation device through temperature feedback is relatively laggy. Especially when the air conditioner is in a high-temperature environment, if heat dissipation starts only when the temperature of the frequency converter is relatively high, it may occur that due to untimely heat dissipation, the temperature of the frequency converter becomes too high, resulting in frequency reduction protection, over-temperature protection, shutdown alarm, etc., affecting the operation of the air conditioner.

[0071] Based on the above problems, the present application proposes a heat dissipation control method for an air conditioner frequency converter. Since the refrigeration demand of the air conditioner affects the magnitude of the current of the frequency converter, the greater the refrigeration demand, the greater the current of the frequency converter, and the higher the temperature of the frequency converter. Therefore, after the air conditioner is started, if the outdoor side of the air conditioner is in a high-temperature environment, obtain the refrigeration demand of the air conditioner, and control the heat dissipation device to dissipate heat from the frequency converter according to the refrigeration demand of the air conditioner. Specifically, when the refrigeration demand of the air conditioner is greater than a preset value, turn on the heat dissipation device to dissipate heat from the frequency converter in advance. The present application dissipates heat from the frequency converter in advance, stabilizes the state of the frequency converter, avoids the frequency converter reaching a relatively high temperature, and tries to ensure that the frequency converter always operates at a normal temperature (less than a certain temperature), so that it will not occur that due to untimely heat dissipation of the frequency converter, the frequency converter has an abnormality due to too high temperature, ensuring the normal operation of the air conditioner.

[0072] The following combines Figure 1 to detail the heat dissipation control method for the air conditioner frequency converter of the present application.

[0073] Figure 1 The schematic flowchart of the heat dissipation control method for the air conditioner frequency converter provided by the present application is shown. Referring to Figure 1 the details of this method are as follows:

[0074] S101, in response to the compressor of the air conditioner entering the self-control mode, obtain the outdoor ambient temperature in real time.

[0075] In this embodiment, after the air conditioner is started, the compressor enters the starting stage; after the compressor starts up, the compressor enters the automatic control stage, that is, the compressor enters the self-control mode according to the refrigeration demand. In the self-control mode, the compressor automatically adjusts its operating state according to the system demand to improve energy efficiency and comfort.

[0076] In a high temperature environment, due to the high ambient temperature, the heat dissipation environment of the inverter is poor. If the air conditioning load is high, the compressor frequency is likely to increase rapidly, the current increases rapidly, and the temperature rises rapidly. At this time, it is necessary to detect the refrigeration demand. If the calculated refrigeration demand is large, it means that the compressor will be in the high-frequency working range for a long period of time, the inverter will continue to output a large current, and the inverter temperature rises rapidly. At this time, it can be determined that the inverter temperature will have a high temperature rise risk. At this time, it is directly predicted to turn on the inverter cooling fan, force convection heat exchange in advance, and prevent the inverter temperature from getting out of control.

[0077] The outdoor ambient temperature can be collected by a temperature sensor.

[0078] S102, when the outdoor environment temperature is greater than a first preset temperature value, obtaining a cooling demand of the air conditioner.

[0079] In this embodiment, the first preset temperature value is the heat dissipation warning temperature of the inverter. The first preset temperature value can be set as needed, for example, the first preset temperature value can be set to 25° C. or 30° C.

[0080] When the outdoor ambient temperature is greater than the first preset temperature value, it is determined that the air conditioner is in a high temperature environment. In order to prevent the inverter temperature from rising rapidly in a high temperature environment, it is necessary to determine whether to dissipate heat for the inverter, and the cooling demand affects the inverter current. If the cooling demand is high, it is determined that the compressor will be turned on at a higher frequency, and the inverter current will also rise faster and continue to output a large current, and the inverter temperature will rise rapidly. Therefore, in order to determine whether the inverter needs to be dissipated in advance, it can be determined by detecting the cooling demand of the air conditioner.

[0081] The cooling demand is theoretically the demand for heat removal. The cooling demand of the air conditioner is closely related to factors such as the outdoor ambient temperature and the temperature to be achieved. The greater the difference between the outdoor ambient temperature and the temperature to be achieved, the greater the cooling demand of the air conditioner.

[0082] Optionally, a curve chart for cooling demand query is pre-set, the horizontal axis of the curve chart is the difference between the outdoor ambient temperature and the desired temperature, and the vertical axis of the curve chart is the cooling demand. After obtaining the difference between the outdoor ambient temperature and the desired temperature, the cooling demand of the air conditioner can be queried according to the curve chart.

[0083] Optionally, the cooling demand is calculated according to Q=c×m×ΔT, where Q is the cooling demand, c is the specific heat capacity of air, m is the mass of air to be cooled, ΔT is the difference between the outdoor ambient temperature and the temperature to be reached, and M is the product of the volume of the space to be cooled and the air density.

[0084] Optionally, the refrigeration demand Q = c × m × ΔT × k; k is a correction factor, which is set as needed.

[0085] S103. When the refrigeration demand is greater than a preset value, control the heat dissipation device to turn on, where the heat dissipation device is used to dissipate heat from the frequency converter of the air conditioner.

[0086] In this embodiment, the greater the refrigeration demand, the higher the frequency of the compressor, the current of the frequency converter will increase rapidly, and the frequency converter will continuously output a large current. Since the temperature of the frequency converter rises relatively fast. To prevent the temperature of the frequency converter from being too high, when the refrigeration demand is greater than the preset value, turn on the heat dissipation device to dissipate heat from the frequency converter in advance, which can stabilize the state of the frequency converter and keep the frequency converter in the normal temperature range all the time.

[0087] The heat dissipation device can be a heat dissipation fan, a water cooling system, a water pump, etc. The heat dissipation fan can be a fixed-frequency fan, a variable-frequency fan, an electronically commutated fan, an axial flow fan and other linear control fans.

[0088] The preset value can be set as needed, which can be an empirical value or an experimental value, and is not limited here.

[0089] In this embodiment, when the heat dissipation device is a heat dissipation fan, if the refrigeration demand is greater than the preset value, determine the interval where the refrigeration demand is located, determine the rotation speed of the heat dissipation fan according to the interval where the refrigeration demand is located, and then control the heat dissipation fan to turn on at the determined rotation speed, so that the rotation speed of the heat dissipation fan matches the refrigeration demand, achieving the purpose of more accurately controlling the heat dissipation fan.

[0090] After the compressor of the air conditioner enters the self-control mode, obtain the outdoor ambient temperature in real time to judge whether the air conditioner is in a high-temperature environment. If the outdoor ambient temperature is greater than the first preset temperature value, it means that the air conditioner is in a relatively high-temperature environment. To ensure the normal operation of the frequency converter, obtain the refrigeration demand of the air conditioner, and then control the heat dissipation device of the frequency converter according to the refrigeration demand of the air conditioner; turn on the heat dissipation device when the refrigeration demand is greater than the preset value, so as to achieve the purpose of dissipating heat from the frequency converter in advance. In this application, since the refrigeration demand of the air conditioner affects the current of the frequency converter, and the current of the frequency converter affects the temperature of the frequency converter; after the compressor enters the self-control mode, predict the temperature change of the frequency converter in advance according to the refrigeration demand, and then turn on the heat dissipation device to dissipate heat from the frequency converter in advance. This application does not cool down the frequency converter after its temperature reaches a certain temperature, but dissipates heat from the frequency converter in advance according to the refrigeration demand; avoid the rapid temperature rise of the frequency converter in a high-temperature environment, conduct forced convective heat transfer in advance, prevent the temperature of the frequency converter from getting out of control, avoid abnormal operation of the frequency converter due to untimely cooling, and reduce the abnormal operation of the air conditioner caused by abnormal temperature of the frequency converter.

[0091] Of course, when the refrigeration demand is less than or equal to the preset value, although the current of the frequency converter will not increase rapidly in a short time, due to the possible influence of the air duct layout on the frequency converter by the heat dissipation of the condenser, that is, the heat dissipated by the condenser will be blocked by the air duct layout and transferred to the frequency converter, resulting in a rapid increase in the temperature of the frequency converter. Therefore, when the refrigeration demand is less than or equal to the preset value, it is also necessary to determine whether the temperature of the frequency converter is already high. If the temperature of the frequency converter is high at this time and its temperature is greater than the preset opening temperature of the heat dissipation device, at this time, it can be determined that the temperature of the frequency converter is in a state where natural convection cannot meet the requirements, and the heat dissipation fan can be turned on in advance to force convection and enhance the heat dissipation efficiency.

[0092] As Figure 2 shown, when the refrigeration demand is less than or equal to the preset value, the above method may further include:

[0093] S201, when the refrigeration demand is less than or equal to the preset value, obtain the first temperature value of the frequency converter.

[0094] In this embodiment, the temperature value of the frequency converter can be obtained through a temperature sensor. The temperature detection of the frequency converter can be real-time detection to facilitate timely detection of abnormalities when the temperature of the frequency converter is high.

[0095] S202, when the first temperature value is greater than the second preset temperature value, control the heat dissipation device to turn on.

[0096] In this embodiment, the second preset temperature value is the opening temperature threshold of the heat dissipation device, and the second preset temperature value can be set as needed, which can be an empirical value or an experimental value. Among them, the first temperature value is the module temperature value of the frequency converter. When the first temperature value is greater than the second preset temperature value, it means that the temperature of the frequency converter is relatively high, and the cooling demand of the frequency converter cannot be met by natural convection. It is necessary to cool the frequency converter through the heat dissipation device. Therefore, control the heat dissipation device to turn on to ensure that the frequency converter can be quickly cooled.

[0097] In this embodiment, when the heat dissipation device is a heat dissipation fan, if the first temperature value of the frequency converter is greater than the second preset temperature value, determine the rotation speed of the heat dissipation fan corresponding to the first temperature value. Control the heat dissipation fan to turn on at this rotation speed.

[0098] In this application, when the refrigeration demand is less than or equal to the preset value, in order to avoid the phenomenon that the heat dissipation of the frequency converter is blocked and the temperature of the frequency converter is too high due to the influence of the air duct layout, etc., the temperature of the frequency converter itself is detected to determine whether the frequency converter needs heat dissipation. When the temperature value of the frequency converter is greater than the preset temperature value, turn on the heat dissipation device to force convective heat transfer, so that the frequency converter can be quickly cooled and avoid abnormalities caused by too high a temperature of the frequency converter.

[0099] For the case where the first temperature value of the frequency converter is less than or equal to the second preset temperature value, if the air conditioner is in a continuous heavy load condition, the frequency converter will also remain in a high-current state, and there is still a risk of temperature runaway for the frequency converter. Therefore, in order to prevent the frequency converter from overheating, it is possible to determine whether there is a risk of temperature runaway for the frequency converter by judging the temperature rise rate of the frequency converter within a period of time, and then turn on the heat dissipation device to dissipate heat for it when it is determined that there is a risk of temperature runaway for the frequency converter.

[0100] Specifically, as Figure 3 shown, the above method may further include:

[0101] S301, when the first temperature value of the frequency converter is less than or equal to the second preset temperature value, obtain the first temperature rise rate of the frequency converter within the first preset duration.

[0102] In this embodiment, the first preset duration can be set as needed. For example, the first preset duration can be 1 minute, 30 seconds, 1 second, etc.

[0103] Specifically, collect the temperature of the frequency converter at time T1. After the first preset duration, collect the temperature of the frequency converter at time T2, calculate the difference between the temperature at time T1 and the temperature at time T2 to obtain the temperature difference. Calculate the ratio of the temperature difference to the first preset duration to obtain the first temperature rise rate.

[0104] Alternatively, collect the temperature rise amount of the frequency converter within a unit time, and record the temperature rise amount of the frequency converter within a unit time as the first temperature rise rate.

[0105] S302, when the first temperature rise rate is greater than the preset temperature rise rate value, control the heat dissipation device to turn on.

[0106] In this embodiment, the preset temperature rise rate value is the temperature rise warning rate. The preset temperature rise rate value is obtained based on experiments or empirical values. For example, it can be obtained by testing the rise rate of the frequency converter under normal load or high-temperature load.

[0107] If the first temperature rise rate of the frequency converter is greater than the preset temperature rise rate value, it indicates that there is a risk of temperature runaway for the frequency converter. In order to prevent the frequency converter from overheating, it is necessary to turn on the heat dissipation device to dissipate heat for the frequency converter.

[0108] In this embodiment, when the heat dissipation device is a heat dissipation fan, if the first temperature rise rate is greater than the preset temperature rise rate value, determine the rotation speed of the heat dissipation fan corresponding to the first temperature rise rate. Control the heat dissipation fan to turn on at this rotation speed.

[0109] The control method for the heat dissipation device in the case where the outdoor ambient temperature is greater than the first preset temperature value, that is, the outdoor environment is a high-temperature environment, has been introduced above. Next, the control method for the heat dissipation device when the outdoor ambient temperature is less than or equal to the first preset temperature value will be introduced.

[0110] When the outdoor ambient temperature is less than or equal to the first preset temperature value, the frequency converter may also be affected by the condenser heat dissipation due to the air duct layout, that is, the heat dissipated by the condenser will be blocked by the air duct layout and transferred to the frequency converter, resulting in a rapid increase in the temperature of the frequency converter. Therefore, when the outdoor ambient temperature is less than or equal to the first preset temperature value, it is also necessary to detect the temperature of the frequency converter and determine whether to turn on the heat dissipation device according to the temperature of the frequency converter.

[0111] Specifically, as Figure 4 shown, when the outdoor ambient temperature is less than or equal to the first preset temperature value, the above method may further include:

[0112] S401, when the outdoor ambient temperature is less than or equal to the first preset temperature value, obtain the second temperature value of the frequency converter.

[0113] S402, when the second temperature value is greater than the second preset temperature value, control the heat dissipation device to turn on.

[0114] This step is the same as step S202 above. Please refer to the description of step S202 above and will not be repeated here.

[0115] S403, when the second temperature value is less than or equal to the second preset temperature value, obtain the second temperature rising rate of the frequency converter within the second preset duration.

[0116] S404, when the second temperature rising rate is greater than the preset temperature rising rate value, control the heat dissipation device to turn on.

[0117] Steps S403 to S404 are the same as steps S301 to S302 above. Please refer to the description of steps S301 to S302 above and will not be repeated here.

[0118] The method for turning on the heat dissipation device when heat dissipation of the frequency converter is required has been introduced above. Next, how to turn off the heat dissipation device after it is turned on will be introduced.

[0119] In a possible implementation, after the heat dissipation device operates for a period of time, in order to reduce energy waste, the temperature of the frequency converter can be detected. If the temperature of the frequency converter has dropped below the preset temperature, the heat dissipation device can be turned off.

[0120] Specifically, the above method may further include:

[0121] S501. After the heat dissipation device is turned on and operates for a third preset duration, obtain a third temperature value of the frequency converter.

[0122] In this embodiment, the third preset duration can be set as needed. For example, the third preset duration can be set to 15 minutes, 20 minutes, etc.

[0123] S502. When the third temperature value is greater than a third preset temperature value, control the frequency converter to turn off.

[0124] In this embodiment, the third preset temperature value is the module protection temperature of the preset frequency converter.

[0125] If after the third preset duration, the temperature value of the frequency converter is still greater than the third preset temperature value, it indicates that the temperature of the frequency converter has not decreased, and the frequency converter is in an over-temperature abnormal state. To protect the frequency converter, an abnormal alarm of the frequency converter is performed, the air conditioner exits the cooling mode, and devices such as the compressor and the frequency converter are turned off to prevent damage to the air conditioner.

[0126] If after the third preset duration, the temperature value of the frequency converter is less than or equal to the third preset temperature value, then it is determined that the frequency converter is not in an over-temperature abnormal state, and the frequency converter is within the normal temperature range. At this time, it is necessary to consider whether the heat dissipation device can be turned off to reduce additional power consumption.

[0127] Specifically, the above method further includes:

[0128] When the third temperature value is less than or equal to the third preset temperature value, and the third temperature value is less than or equal to a fourth preset temperature value, turn off the heat dissipation device.

[0129] When the third temperature value is less than or equal to the third preset temperature value, and the third temperature value is greater than the fourth preset temperature value, keep the heat dissipation device turned on.

[0130] In this embodiment, the fourth preset temperature value is the heat dissipation device off threshold.

[0131] If the temperature of the frequency converter is less than or equal to the heat dissipation device off threshold, then it is determined that the temperature of the frequency converter is already very low, and the heat dissipation device can be turned off. At this time, turn off the heat dissipation device to reduce energy consumption.

[0132] If the temperature of the frequency converter is greater than the heat dissipation device off threshold, it indicates that the temperature of the frequency converter has not decreased to the normal temperature yet, that is, the frequency converter still needs the heat dissipation device to dissipate heat for it. Therefore, it is necessary to keep the heat dissipation device turned on continuously.

[0133] Next, another implementation manner of the present application is introduced. As Figure 5 shown, the above method may further include:

[0134] S11. The air conditioner is turned on and meets the cooling demand. The air conditioner enters the cooling state. After the compressor goes through the startup stage, the compressor enters the self-control mode.

[0135] S12. Obtain the outdoor ambient temperature and determine whether the outdoor ambient temperature is greater than the first preset temperature value.

[0136] S13. If the outdoor ambient temperature is greater than the first preset temperature value, obtain the cooling demand of the air conditioner and determine whether the cooling demand is greater than the preset value.

[0137] If the outdoor ambient temperature is less than or equal to the first preset temperature value, execute step S15 to obtain the temperature of the frequency converter.

[0138] S14. If the cooling demand is greater than the preset value, turn on the heat dissipation device to dissipate heat for the frequency converter.

[0139] S15. If the cooling demand is less than or equal to the preset value, obtain the temperature value of the frequency converter and determine whether the temperature value of the frequency converter is greater than the second preset temperature value.

[0140] If the temperature value of the frequency converter is greater than the second preset temperature value, turn on the heat dissipation device.

[0141] S16. If the temperature value of the frequency converter is less than or equal to the second preset temperature value, obtain the temperature rising rate of the frequency converter within the preset duration and determine whether the temperature rising rate is greater than the preset temperature rising rate value.

[0142] If the temperature rising rate of the frequency converter is greater than the preset temperature rising rate, turn on the heat dissipation device.

[0143] If the temperature rising rate of the frequency converter is less than or equal to the preset temperature rising rate, loop to execute steps S12 to S16.

[0144] S17. After the heat dissipation device operates for the preset duration, obtain the temperature value of the frequency converter.

[0145] S18. Determine whether the temperature value of the frequency converter is less than or equal to the third preset temperature value.

[0146] S19. If the temperature value of the frequency converter is greater than the third preset temperature value, determine that the frequency converter is over-temperature abnormal and turn off the frequency converter.

[0147] S20. If the temperature value of the frequency converter is less than or equal to the third preset temperature value, determine whether the temperature value of the frequency converter is less than or equal to the fourth preset temperature value.

[0148] S21. If the temperature value of the frequency converter is less than or equal to the fourth preset temperature value, turn off the heat dissipation device.

[0149] S22. If the temperature value of the frequency converter is greater than the fourth preset temperature value, keep the heat dissipation device in the on state.

[0150] In this application, in an extremely high-temperature environment, it is judged whether the frequency converter will be in a high-temperature out-of-control state through the refrigeration demand; if it is determined according to the refrigeration demand that the frequency converter will be in a high-temperature out-of-control state, the heat dissipation device is turned on in advance to dissipate heat from the frequency converter, reducing the risk of the frequency converter having too high a temperature and shortening the cooling cycle. In addition, this application also considers the influence of the air duct and high load on the temperature of the frequency converter, and adopts the method of monitoring the temperature of the frequency converter and the temperature rising rate of the frequency converter. When the temperature of the frequency converter is relatively high or the temperature rising rate is relatively high, the heat dissipation device is turned on to dissipate heat from the frequency converter, reducing the risk of the frequency converter entering a high-temperature state. This application uses the forced convection method of the heat dissipation device to dissipate heat from the frequency converter, improving the heat dissipation rate and ensuring heat dissipation uniformity.

[0151] To verify the effect of this application, the temperature performance of the frequency converter under this application and the prior art was compared, as shown in the following table.

[0152] Parameter Unit Without heat dissipation device Existing heat dissipation method Method of this application Highest temperature of the frequency converter module ℃ 85 78 60 Temperature stabilization time of the frequency converter module Min 23 15 12 Stable temperature of the frequency converter module ℃ 80 55 55 Ambient temperature ℃ 45℃ 45℃ 45℃

[0153] It can be seen from the above table that under the method of this application, the highest temperature and the temperature stabilization time of the frequency converter are better than those of the existing method. Therefore, using this application can dissipate heat from the frequency converter in time and prevent the frequency converter from malfunctioning due to overheating.

[0154] It should be understood that the magnitudes of the sequence numbers of the steps in the above embodiments do not mean the order of execution. The execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of this application.

[0155] Corresponding to the heat dissipation control method of the air conditioner frequency converter described in the above embodiments, Figure 6 The block diagram of the air conditioner provided by the embodiment of this application is shown. For the sake of convenience of description, only the parts related to the embodiment of this application are shown.

[0156] Refer to Figure 6 , the air conditioner 500 may include: a temperature acquisition module 510, a demand determination module 520, and a control module 530.

[0157] Among them, the temperature acquisition module 510 is configured to, in response to the compressor of the air conditioner entering the self-control mode, acquire the outdoor ambient temperature in real time;

[0158] The demand determination module 520 is configured to acquire the refrigeration demand of the air conditioner when the outdoor ambient temperature is greater than the first preset temperature value;

[0159] A control module 530, configured to control a heat dissipation device to turn on when the refrigeration demand is greater than a preset value, where the heat dissipation device is used to dissipate heat from an inverter of the air conditioner.

[0160] In a possible implementation manner, the control module 530 may specifically further be configured to:

[0161] When the refrigeration demand is less than or equal to the preset value, obtain a first temperature value of the inverter;

[0162] When the first temperature value is greater than a second preset temperature value, control the heat dissipation device to turn on.

[0163] In a possible implementation manner, the control module 530 may further be configured to:

[0164] When the first temperature value is less than or equal to the second preset temperature value, obtain a first temperature rising rate of the inverter within a first preset duration;

[0165] When the first temperature rising rate is greater than a preset temperature rising rate value, control the heat dissipation device to turn on.

[0166] In a possible implementation manner, the above air conditioner further includes:

[0167] A first inverter temperature acquisition module, configured to obtain a second temperature value of the inverter when the outdoor ambient temperature is less than or equal to the first preset temperature value;

[0168] The control module is further configured to control the heat dissipation device to turn on when the second temperature value is greater than the second preset temperature value.

[0169] In a possible implementation manner, the control module 530 is further configured to:

[0170] When the second temperature value is less than or equal to the second preset temperature value, obtain a second temperature rising rate of the inverter within a second preset duration;

[0171] When the second temperature rising rate is greater than the preset temperature rising rate value, control the heat dissipation device to turn on.

[0172] In a possible implementation manner, the above air conditioner further includes:

[0173] A second inverter temperature acquisition module, configured to obtain a third temperature value of the inverter after the heat dissipation device is turned on and operates for a third preset duration;

[0174] The control module is further configured to control the inverter to turn off when the third temperature value is greater than a third preset temperature value.

[0175] In a possible implementation, the control module 530 is further configured to:

[0176] When the third temperature value is less than or equal to the third preset temperature value and the third temperature value is less than or equal to the fourth preset temperature value, turn off the heat dissipation device.

[0177] In a possible implementation, the control module 530 is further configured to:

[0178] When the third temperature value is less than or equal to the third preset temperature value and the third temperature value is greater than the fourth preset temperature value, keep the heat dissipation device on.

[0179] It should be noted that for the information interaction, execution process, etc. between the above-mentioned device / units, since they are based on the same concept as the method embodiments of the present application, for their specific functions and the technical effects brought, please refer to the method embodiment part for details, and will not be elaborated here.

[0180] Those skilled in the art can clearly understand that for the convenience and brevity of description, only the above division of each functional unit and module is used as an example. In actual applications, the above functions can be allocated to different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiments can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above integrated units can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of each functional unit and module are only for the convenience of mutual distinction and do not limit the protection scope of the present application. The specific working process of the units and modules in the above system can refer to the corresponding process in the foregoing method embodiments and will not be elaborated here.

[0181] The embodiment of the present application also provides an air conditioner. Refer to Figure 7 , the air conditioner 600 may include: at least one processor 610, a memory 620, and a computer program stored in the memory 620 and executable on the at least one processor 610. When the processor 610 executes the computer program, the steps in any of the above method embodiments are implemented, such as Figure 1 the steps S101 to S103 in the illustrated embodiment. Or, when the processor 610 executes the computer program, the functions of each module / unit in the above device embodiments are implemented, such as Figure 6 the functions of the illustrated temperature acquisition module 510 to the control module 530.

[0182] Exemplarily, a computer program can be segmented into one or more modules / units. One or more modules / units are stored in the memory 620 and executed by the processor 610 to complete this application. The one or more modules / units can be a series of computer program segments capable of accomplishing specific functions, and these program segments are used to describe the execution process of the computer program in the air conditioner 600.

[0183] Those skilled in the art can understand that Figure 7 merely examples of the air conditioner, which do not constitute a limitation to the air conditioner, and may include more or fewer components than those shown in the figure, or combine some components, or different components, such as input / output devices, network access devices, buses, etc.

[0184] The processor 610 can be a central processing unit (CPU), or can also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc.

[0185] The memory 620 can be an internal storage unit of the air conditioner, or can also be an external storage device of the air conditioner, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. The memory 620 is used to store the computer program and other programs and data required by the air conditioner. The memory 620 can also be used to temporarily store the data that has been output or will be output.

[0186] The bus can be an industry standard architecture (ISA) bus, a peripheral component interconnect (PCI) bus, or an extended industry standard architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For the sake of easy representation, the bus in the drawings of this application is not limited to only one bus or one type of bus.

[0187] The heat dissipation control method of the air conditioner frequency converter provided by the embodiments of the present application can be applied to terminal devices such as computers, tablet computers, laptop computers, netbooks, personal digital assistants (PDAs), etc. The embodiments of the present application do not impose any restrictions on the specific types of terminal devices.

[0188] In the above embodiments, the descriptions of the respective embodiments have their own focuses. For parts not detailed or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0189] Those of ordinary skill in the art can realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0190] In the embodiments provided by the present application, it should be understood that the disclosed terminal devices, devices and methods can be implemented in other ways. For example, the terminal device embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces, and the indirect couplings or communication connections of the devices or units can be in electrical, mechanical or other forms.

[0191] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place, or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0192] In addition, the functional units in the various embodiments of the present application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0193] When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, to implement all or part of the processes in the above-described embodiment methods of this application, it can also be completed by instructing relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by one or more processors, the steps of the above-described various method embodiments can be implemented.

[0194] When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, to implement all or part of the processes in the above-described embodiment methods of this application, it can also be completed by instructing relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by one or more processors, the steps of the above-described various method embodiments can be implemented.

[0195] Similarly, as a computer program product, when the computer program product runs on a terminal device, it enables the terminal device to implement the steps in the above-described various method embodiments when executed.

[0196] Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file, or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disc, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal, and software distribution medium, etc. It should be noted that the content included in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0197] The above-described embodiments are only used to illustrate the technical solutions of this application, rather than to limit it; although this application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing various embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of this application, and should all be included in the protection scope of this application.

Claims

1. A heat dissipation control method for an air conditioner frequency converter, characterized in that Including: In response to the compressor of the air conditioner entering the self-control mode, the outdoor ambient temperature is obtained in real time; When the outdoor ambient temperature is greater than the first preset temperature value, the cooling demand of the air conditioner is obtained; When the cooling demand is greater than the preset value, the cooling device is controlled to turn on, where the cooling device is used to cool the frequency converter of the air conditioner.

2. The heat dissipation control method of the air conditioner frequency converter according to claim 1, characterized in that, After obtaining the cooling demand of the air conditioner, the method further includes: When the cooling demand is less than or equal to the preset value, the first temperature value of the frequency converter is obtained; When the first temperature value is greater than the second preset temperature value, the cooling device is controlled to turn on.

3. The heat dissipation control method of the air conditioner frequency converter according to claim 2, characterized in that, After obtaining the first temperature value of the frequency converter, the method further includes: When the first temperature value is less than or equal to the second preset temperature value, the first temperature rise rate of the frequency converter within the first preset time period is obtained; When the first temperature rise rate is greater than the preset temperature rise rate value, the cooling device is controlled to turn on.

4. The heat dissipation control method of the air conditioner frequency converter according to claim 1, characterized in that, After obtaining the outdoor ambient temperature in real time, the method further includes: When the outdoor ambient temperature is less than or equal to the first preset temperature value, the second temperature value of the frequency converter is obtained; When the second temperature value is greater than the second preset temperature value, the cooling device is controlled to turn on.

5. The heat dissipation control method of the air conditioner frequency converter according to claim 4, characterized in that, After obtaining the second temperature value of the frequency converter, the method further includes: When the second temperature value is less than or equal to the second preset temperature value, the second temperature rise rate of the frequency converter within the second preset time period is obtained; When the second temperature rise rate is greater than the preset temperature rise rate value, the cooling device is controlled to turn on.

6. The heat dissipation control method of the air conditioner frequency converter according to any one of claims 1 to 5, characterized in that, The method further includes: After the cooling device is turned on and operates for the third preset time period, the third temperature value of the frequency converter is obtained; When the third temperature value is greater than the third preset temperature value, the frequency converter is controlled to turn off.

7. The heat dissipation control method of the air conditioner frequency converter according to claim 6, characterized in that, After obtaining the third temperature value of the frequency converter, the method further includes: When the third temperature value is less than or equal to the third preset temperature value and the third temperature value is less than or equal to the fourth preset temperature value, the cooling device is turned off.

8. The heat dissipation control method of the air conditioner frequency converter according to claim 6, characterized in that, After obtaining the third temperature value of the frequency converter, the method further includes: When the third temperature value is less than or equal to the third preset temperature value and the third temperature value is greater than the fourth preset temperature value, the cooling device is kept turned on.

9. An air conditioner, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the cooling control method of the air conditioner frequency converter as described in any one of claims 1 to 8.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the cooling control method of the air conditioner frequency converter as described in any one of claims 1 to 8.

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