Patent Description:
With the rapid development of air conditioner technology, various air conditioners have been widely used in people's daily lives. During the refrigeration operation of existing air conditioners, it is often necessary to control the evaporation temperature of a heat exchanger. The existing air conditioner usually controls the evaporation temperature by taking a fixed value or a simple temperature range as a target value of the evaporation temperature. However, as the air conditioner operates, capacity requirements of an indoor environment will also change. If the air conditioner keeps operating by controlling the evaporation temperature in the above manner, it will often lead to large fluctuations in the indoor temperature and even frequent start and stop of the internal unit after over-cooling. All the above situations reflect the problem that it is difficult to achieve precise control of the indoor temperature through the existing refrigeration methods for air conditioners.

<CIT> discloses an alternative refrigeration control method for an air conditioner.

The main purpose of the present application is to provide a refrigeration control method of an air conditioner, an air conditioner and a computer readable storage medium, aiming to solve the technical problem that it is difficult to achieve precise control of indoor temperature through the existing refrigeration methods of air conditioners.

In order to achieve the above objective, the present application provides a refrigeration control method of an air conditioner, including:.

In some embodiments, the step of after the indoor temperature meets the preset condition, determining the instantaneous capacity demand of the indoor heat load according to the currently detected indoor temperature and the currently detected outdoor temperature, determining the target evaporation temperature according to the instantaneous capacity demand, and determining the operating frequency and the action cycle of the compressor of the air conditioner based on the target evaporation temperature and the actual evaporation temperature, further includes:.

In some embodiments, the step of after controlling the compressor to run at the operating frequency for several action cycles, in response to that the currently actual evaporation temperature does not reach the target evaporation temperature, returning to perform the step of determining the instantaneous capacity demand of the indoor heat load according to the currently detected indoor temperature and the currently detected outdoor temperature until the air conditioner meets the preset stop condition, further includes:.

In some embodiments, after the step of controlling the compressor to run at the operating frequency for the one action cycle, the method further includes:.

In some embodiments, before the step of after the indoor temperature meets the preset condition, determining the instantaneous capacity demand of the indoor heat load according to the currently detected indoor temperature and the currently detected outdoor temperature, the method further includes:.

In some embodiments, after the step of determining whether the indoor temperature after the one action cycle is in the temperature control range determined by the preset temperature, the method further includes:.

In some embodiments, the step of determining the initial demand value of the instantaneous capacity demand according to the currently detected indoor temperature and the currently detected outdoor temperature, further includes:.

In some embodiments, the step of determining the initial temperature value of the target evaporation temperature based on the initial demand value further includes:
obtaining the initial temperature value by calculating a result of a rated power of the air conditioner, the initial demand value, the indoor temperature and the outdoor temperature under a preset functional relationship.

In order to achieve the above objective, the present application further provides a refrigeration control device of an air conditioner, including:.

In some embodiments, the instantaneous demand determination module, further includes:.

In some embodiments, the refrigeration operation control module further includes:.

In some embodiments, the refrigeration control device of the air conditioner further includes:.

In some embodiments, the initial value determination unit is further configured to.

In some embodiments, the initial frequency determination unit is further configured to:
obtain the initial temperature value by calculating a result of a rated power of the air conditioner, the initial demand value, the indoor temperature and the outdoor temperature under a preset functional relationship.

In order to achieve the above objective, the present application further provides an air conditioner, including a memory, a processor and a refrigeration control program of the air conditioner stored in the memory and executable on the processor, when the refrigeration control program of the air conditioner is executed by the processor, the aforementioned steps of a refrigeration control method of the air conditioner are implemented.

In order to achieve the above objective, the present application further provides a computer readable storage medium. A refrigeration control program of an air conditioner is stored on the computer readable storage medium, when the refrigeration control program of the air conditioner is executed by a processor, the aforementioned steps of a refrigeration control method of the air conditioner are implemented.

In order to achieve the above objective, the present application further provides a computer program product including a computer program. When the computer program is executed by a processor, the aforementioned steps of a refrigeration control method of the air conditioner are implemented.

The present application provides a refrigeration control method of an air conditioner, an air conditioner and a computer readable storage medium. The refrigeration control method of the air conditioner includes: continuously detecting changes of temperature in indoor and outdoor environment after cooling operation to obtain the instantaneous capacity demand of the indoor heat load, and continuously updating the instantaneous capacity demand over time, so that the air conditioner can determine the indoor heat load in real time; then determining the target evaporation temperature according to the instantaneous capacity demand, and continuously updating the target evaporation temperature over time; and finally adjusting the operating frequency of the compressor according to the constantly changing target evaporation temperature. In this way, the actual evaporation temperature can be adjusted to close to the target evaporation temperature, the evaporation temperature is controlled to change with the change of the real-time heat load, thereby achieving the effect of precise indoor temperature control and solving the problem that it is difficult to achieve precise control of indoor temperature through the existing refrigeration control methods of air conditioners.

In addition, since in the present application, the evaporation temperature is adjusted in a continuous and stable manner according to the real-time indoor heat load during the entire refrigeration operation adjustment process, it can avoid large fluctuations in indoor temperature or frequent start and stop of the inner unit after over-cooling caused by the existing refrigeration adjustment manner. As a result, energy can be saved to a large extent.

The implementation of the purpose, functional characteristics and advantages of the present application will be further described with reference to the attached drawings and in combination with embodiments.

It should be understood that the specific embodiments described here are only used to explain the present application and are not used to limit the present application.

With the rapid development of air conditioner technology, various air conditioners have been widely used in people's daily lives. During the refrigeration operation of existing air conditioners, it is often necessary to control the evaporation temperature of a heat exchanger. The existing air conditioner usually controls the evaporation temperature by taking a fixed value or a simple temperature range as a target value of the evaporation temperature. However, as the air conditioner operates, capacity requirements of the indoor environment will also change. If the air conditioner keeps operating by controlling the evaporation temperature in the above manner, it will often lead to large fluctuations in the indoor temperature and even frequent start and stop of the internal unit after over-cooling. All the above situations reflect the problem that it is difficult to achieve precise control of indoor temperature through the existing refrigeration methods of air conditioners.

In order to solve the above technical problems, the present application provides a refrigeration control method of an air conditioner, including: continuously detecting changes of temperature in indoor and outdoor environment after refrigeration operation to obtain the instantaneous capacity demand for indoor heat load, and continuously updating the instantaneous capacity demand over time, so that the air conditioner can determine the indoor heat load in real time; then determining a target evaporation temperature according to the instantaneous capacity demand, and continuously updating the target evaporation temperature over time; and finally adjusting an operating frequency of a compressor according to the changing target evaporation temperature. In this way, the actual evaporation temperature can be adjusted to close to the target evaporation temperature, the evaporation temperature is controlled to change with the change of the real-time heat load, thereby achieving the effect of precise indoor temperature control and solving the problem that it is difficult to achieve precise control of indoor temperature through the existing refrigeration methods of air conditioners.

<FIG> is a schematic structural view of a hardware operating environment of an air conditioner according to some embodiments of the present application.

As shown in <FIG>, the air conditioner can include: a processor <NUM>, a user interface <NUM>, a network interface <NUM>, and a memory <NUM>. The communication bus <NUM> is used to realize connection communication between these components. The optional user interface <NUM> can include a standard wired interface and a wireless interface. The network interface <NUM> can optionally include a standard wired interface or a wireless interface (such as a WI-FI interface). The memory <NUM> can be a high-speed random access memory (RAM) or a stable memory (non-volatile memory). The memory <NUM> can optionally be a storage device independent of the aforementioned processor <NUM>.

In some embodiments, the air conditioner can also include a camera, a radio frequency (RF) circuit, a sensor, an audio circuit, and so on. The sensor can be a light sensor and other sensors. Specifically, the light sensor can include an ambient light sensor and a proximity sensor. The ambient light sensor can adjust the brightness of the display screen according to the brightness of the ambient light. Certainly, the air conditioner can also be equipped with a barometer, a hygrometer, a thermometer, an infrared sensor or other sensors, which will not be described in detail here.

Those skilled in the art can understand that the structure of the air conditioner shown in <FIG> does not limit the air conditioner and can include more or less components than shown, or a combination of certain components, or differently arranged components.

As shown in <FIG>, the memory <NUM>, which is a computer storage medium, can include an operating system, a network communication module, a user interface module, and a refrigeration control program of an air conditioner.

In the air conditioner shown in <FIG>, the network interface <NUM> is mainly used to be connected to the backend server and perform data communicate with the backend server. The user interface <NUM> is mainly used to be connected to the client (user) and perform data communicate with the client, and the processor <NUM> can be used to call the above-mentioned program stored in the memory <NUM> and perform the following operations in the refrigeration control method of the air conditioner.

Based on the above hardware structure, various embodiments of the refrigeration control method of the air conditioner of the present application are proposed.

Referring to <FIG> is a schematic flowchart of the refrigeration control method of the air conditioner according to a first embodiment of the present application.

A first embodiment of the present application provides the refrigeration control method of the air conditioner, which includes the following steps:
step S10, after the refrigeration operation of the air conditioner, detecting an indoor temperature, an outdoor temperature and an actual evaporation temperature of the air conditioner during operation.

In this embodiment, the method is applied to an air conditioner system. The air conditioner system can be various types of air conditioner systems. Specifically, it can be a variable refrigerant volume air conditioner system, a split type air conditioner system, etc. Taking the variable refrigerant volume as an example, the present variable refrigerant volume system often uses a fixed target evaporation temperature when operating no matter in a single-on mode or in a multiple-on mode. This results in the system capability output matched in the single-on mode being inaccurate. Such that the room temperature will fluctuate greatly, or the inner unit will start and stop frequently after over-cooling when it reaches a temperature. Therefore, this embodiment provides a control method for adjusting the target evaporation temperature according to changes in the indoor preset temperature and the actual indoor and outdoor environment temperature, thereby controlling the evaporation temperature to change along with the real-time heat load changes. In this way, the system may save energy and precisely control the temperature of the room. The indoor temperature refers to the indoor environment temperature of the room where the air conditioner is located. The actual evaporation temperature refers to the evaporation temperature of the heat exchanger in the air conditioner, and various collection methods can be used, which is not limited in this embodiment.

After entering the refrigeration mode, the air conditioner system continuously detects the indoor environment temperature, the outdoor environment temperature and the actual evaporation temperature of the heat exchanger during the refrigeration operation. It should be noted that the indoor environment temperature, the outdoor environment temperature and the actual evaporation temperature may change over time, so the air conditioner system will update the detection values every once in a while.

Step S20, in response to that the indoor temperature meets a preset condition, determining an instantaneous capacity demand of an indoor heat load according to a currently detected indoor temperature and a currently detected outdoor temperature, determining a target evaporation temperature according to the instantaneous capacity demand, and determining an operating frequency and an action cycle of a compressor of the air conditioner based on the target evaporation temperature and the actual evaporation temperature.

In this embodiment, the preset condition refers to the entry condition of the control process of this solution. The specific entry condition of the control process can be set as follows: the difference between the indoor environment temperature and the room set temperature (set by the user or default by the air conditioner system) is within a certain temperature range, or the difference between the indoor environment temperature and the room set temperature is a specific temperature difference, etc..

The instantaneous capacity demand refers to the capacity demand for the indoor unit in the room at a certain moment, which is obtained from the instantaneous cooling load and the sensible heat load to be removed. The instantaneous cooling load refers to the heat that needs to be taken away from the room in order to maintain the indoor environment temperature at a certain moment; and the sensible heat load to be removed refers to the cooling load formed by the sensible heat to be removed in order to reduce the indoor environment temperature at a certain moment to the set temperature of the indoor unit. The action cycle refers to the unit time of the compressor corresponding to the target evaporation temperature and the actual evaporation temperature at this time.

The target evaporation temperature refers to the ideal value of the actual evaporation temperature. Since there may be multiple values corresponding to the indoor and outdoor environment temperatures as the instantaneous capacity demand changes, multiple values of the target evaporation temperature will also be determined based on the multiple values of the instantaneous capacity demand. That is to say, the initial temperature value of the target evaporation temperature is first determined according to the initial demand value of the instantaneous capacity demand, and then with each change in the instantaneous capacity demand, the value of the target evaporation temperature will also be continuously updated and adjusted.

Specifically, the air conditioner system detects the indoor environment temperature in real time and determines whether the current indoor environment temperature meets the preset conditions. In response to that the air conditioner system detects that the indoor environment temperature at a certain moment meets the preset entry conditions (ie, the above preset conditions), it can enter the cooling control process. The air conditioner system continuously obtains the changes in indoor and outdoor environment temperatures, and determines the instantaneous capacity demand of the indoor heat load at different times based on the changes. It should be noted that the indoor and outdoor environment temperatures and the instantaneous capacity demand of the indoor heat load may continue to change over time. The air conditioner system determines the operating frequency and corresponding action cycle of the compressor based on the currently determined target evaporation temperature and the corresponding actual evaporation temperature, and then controls the compressor to run several action cycles according to this operating frequency. Specifically, it can be one action cycle or multiple action cycles.

In addition, in response to that the air conditioner system detects that the indoor environment temperature meets the above preset condition, a step of determining whether the compressor is turned on can be added. If the compressor has been turned on, proceeding directly to the subsequent steps; if the compressor has not been turned on, turning on the compressor first, controlling the compressor to run at a preset initial frequency for a period of time, and then proceeding to the subsequent steps.

Step S30: after controlling the compressor to run at the operating frequency for several action cycles, in response to that a currently actual evaporation temperature does not reach the target evaporation temperature, returning to the step of determining the instantaneous capacity demand of the indoor heat load according to the currently detected indoor temperature and the currently detected outdoor temperature until the air conditioner meets a preset stop condition.

In this embodiment, the air conditioner system obtains the initial temperature value of the target evaporation temperature based on the initial demand value of the instantaneous capacity demand, then adjusts the operating frequency of the compressor in the system based on the difference between the initial temperature value of the target evaporation temperature and the actual evaporation temperature, and finally determines the corresponding action cycle. After several action cycles, determining whether the actual evaporation temperature at this time reaches the target evaporation temperature (the values are equal or the difference is within a small range). If the air conditioner system detects that the actual evaporation temperature at this time still fails to reach the target evaporation temperature, it needs to determine the update demand value of the instantaneous capacity demand at the current moment again, determine the update temperature value of the target evaporation temperature at this time based on the update demand value of the instantaneous capacity demand (that is, adjusting the target evaporation temperature), then adjust the operating frequency of the compressor and determine the corresponding action cycle according to the difference between the update temperature value of the target evaporation temperature and the actual evaporation temperature at this time, control the compressor to run several corresponding action cycles at the adjusted frequency, and repeatedly implement the above steps until the exit condition of the control process (that is, the above-mentioned stop condition) is currently met. The exit condition can be that the air conditioner system is shut down or the air conditioner stop running after the temperature reaches a certain temperature, etc..

In addition, it should be noted that as for the adjustment method of the actual evaporation temperature, in addition to changing the operating frequency of the compressor as mentioned above, a control method of changing the air volume of the internal fan (by controlling the speed) can also be used. As for the specific value of the internal fan speed, the air conditioner system can determine it according to the target evaporation temperature. The specific determination method can refer to the above-mentioned determination method of the compressor operating frequency, or use other methods. In the actual implementation process, the compressor operating frequency control method or the internal fan air volume control method can be used alone, or the two methods can be combined to adjust the actual evaporation temperature.

In this embodiment, after the air conditioner is operated for refrigeration, the indoor temperature, outdoor temperature and actual evaporation temperature of the air conditioner during operation are detected; in response to that the indoor temperature meets the preset conditions, the instantaneous capacity demand of the indoor heat load is determined based on the currently detected indoor temperature and the currently detected outdoor temperature, the target evaporation temperature is determined based on the instantaneous capacity demand, and the operating frequency and the action cycle of the compressor in the air conditioner are determined based on the target evaporation temperature and the actual evaporation temperature; after controlling the compressor to run at the operating frequency for several action cycles, if the actual evaporation temperature does not reach the target evaporation temperature at this time, returning to the step of determining the instantaneous capacity demand of the indoor heat load according to the currently detected indoor temperature and the currently detected outdoor temperature until the air conditioner meets a preset stop condition. In this embodiment, the above method includes: continuously detecting changes of temperature in indoor and outdoor environment after cooling operation to obtain the instantaneous capacity demand corresponding to the indoor heat load, and continuously updating the instantaneous capacity demand over time, so that the air conditioner can determine the indoor heat load in real time; then determining the target evaporation temperature at that time according to the instantaneous capacity demand, and continuously updating the target evaporation temperature over time; and finally adjusting the operating frequency of the compressor according to the constantly changing target evaporation temperature. In this way, the actual evaporation temperature can be adjusted to close to the target evaporation temperature, the evaporation temperature is controlled to change with the change of the real-time heat load, thereby achieving the effect of precise indoor temperature control and solving the problem that it is difficult to achieve precise control of indoor temperature through the existing refrigeration methods of air conditioners.

In addition, since in the present application, the evaporation temperature is adjusted in a continuous and stable manner according to the real-time indoor heat load during the entire refrigeration operation adjustment process, it can avoid large fluctuations in the indoor temperature or frequent start and stop of the inner unit after over-cooling caused by the existing refrigeration adjustment manner. Such that energy can be saved to a large extent.

Further, based on the first embodiment shown in <FIG>, a second embodiment of the refrigeration control method of an air conditioner of the present application is proposed. In this embodiment, step S20 includes:.

In this embodiment, when the air conditioner system detects that the current indoor environment temperature meets the above-mentioned preset conditions, the initial demand value of the instantaneous capacity demand (i.e., the above-mentioned initial demand value) is calculated based on the indoor and outdoor environment temperature at that time according to the preset calculation method, and then the initial temperature value of the target evaporation temperature (i.e., the above-mentioned initial value of temperature) is calculated based on the initial demand value through a preset calculation method. The air conditioner system updates the actual evaporation temperature at this time and obtains the temperature difference between the initial temperature value and the actual evaporation temperature at this time. Based on the temperature difference, the operating frequency of the compressor and the action cycle corresponding to this temperature difference are determined according to a temperature difference table.

In this embodiment, the air conditioner system controls the compressor to run for one action cycle according to the currently determined operating frequency, and then continues to determine whether the actual evaporation temperature at this time after one action cycle reaches the initial temperature value of the target evaporation temperature. Specifically, determining whether the actual evaporation temperature reaches the preset condition, may be determining whether the initial temperature value is the same as the actual evaporation temperature, or whether the difference may be within a smaller range. If the air conditioner system detects that the actual evaporation temperature at this time after an action cycle has not reached the above-mentioned initial temperature value, the air conditioner system will update the instantaneous capacity demand according to the indoor and outdoor environment temperature at this time according to the preset calculation method to obtain the update demand value of the instantaneous capacity demand, and according to this update demand value, the target evaporation temperature is updated correspondingly, and the update temperature value of the target evaporation temperature is obtained. Then the air conditioner system returns to perform the above-mentioned steps of obtaining the temperature difference and adjusting the compressor frequency based on the temperature difference based on the update temperature value, until it detects that the current actual evaporation temperature is close to or equal to the target evaporation temperature, the current control process can be ended.

Specifically, the table of the operating frequency and the corresponding action cycle is shown in Table <NUM>:.

A and B in the table are both positive numbers, and the unit is °C, which can be flexibly set according to actual needs.

Taking the data in the first, fourth and sixth columns of the table as an example, if the temperature difference at this time is X<-A, the air conditioner system controls the operating frequency of the compress to reduce by <NUM>, that is to say, the operating frequency reduced by <NUM> is the corrected operating frequency. In addition, the air conditioner system runs for a corresponding action cycle of <NUM> seconds at the operating frequency reduced by <NUM>. If the temperature difference at this time is greater than or equal to -<NUM> and less than or equal to <NUM>, it means that the actual evaporation temperature at this time is close to the corresponding target evaporation temperature. No adjustment is needed. After the air conditioner system runs for a corresponding action cycle of <NUM> at the current operating frequency, it is determined that whether the actual evaporation temperature at this time reaches the corresponding target evaporation temperature. If the temperature difference at this time satisfies X≥A, the air conditioner system controls the operating frequency of the compress to increase by <NUM>, that is to say, the operating frequency increased by <NUM> is used as the corrected operating frequency. In addition, the air conditioner system runs for a corresponding action cycle of <NUM> seconds at the operating frequency increased by <NUM>. Other situations can be deduced in the same way, and will not be described in detail in this embodiment.

In this embodiment, the instantaneous capacity demand and the initial temperature value of the target evaporation temperature are first determined, the compressor operating frequency is adjusted and the operation of the compressor is controlled by referring to a table, and if the actual evaporation temperature after operation does not reach the target evaporation temperature, the instantaneous capacity demand and target evaporation temperature are updated in a timely manner to continue to adjust the compressor operating frequency repeatedly, thereby achieving precise cooling effects in a convenient and efficient way.

Further, after step S31, the method also includes:.

In this embodiment, the purpose of this step is to test whether the cooling effect of the operation of adjusting the operating frequency of the compressor at this time is effective. The preset duration is the length of time to test the effectiveness of cooling, which can be flexibly set according to actual needs. The preset change value is the change threshold used to judge the effectiveness of cooling, and can also be flexibly set according to actual needs.

After the air conditioner system enters the cooling operation mode, every preset duration, the air conditioner system will obtain the change value of the indoor environment temperature within the preset duration. Therefore, after the air conditioner system controls the compressor to run for one action cycle at the adjusted operating frequency, it is necessary to determine whether the change value of the indoor environment temperature in the latest preset duration is less than the above-mentioned preset change value. If the air conditioner system detects that the change value is less than the preset change value, it means that the cooling effect of the air conditioner is not obvious, and the instantaneous capacity demand of the indoor environment needs to be redetermined, and the process of re-determining the instantaneous capacity demand is returned.

In this embodiment, it is timely determined that whether the current cooling operation based on the compressor is effective by promptly detecting the change value of the indoor temperature within the preset duration after the completion of each action cycle. If it is invalid, the current instantaneous capacity demand to be re-determined. If it is valid, it can enter the subsequent process to ensure that the overall cooling control process can be carried out effectively.

Further, before step S20, the method also includes:
determining a preset temperature.

In this embodiment, the preset temperature refers to the indoor cooling target value of the air conditioner system. This value can be specified by the user, or the system can automatically select a default value. The temperature control range is determined by the preset temperature and a certain smaller temperature value. If the preset temperature is represented by by Ts, and a certain smaller temperature value is represented by by ΔT, then the temperature control range can be represented by (Ts - ΔT, Ts + ΔT).

The air conditioner system determines whether the indoor environment temperature after an action cycle is within the temperature control range. If the indoor environment temperature after an action cycle is still within the temperature control cycle, which means that the cooling effect at this time has not yet met the expected level and it is necessary to redetermine the instantaneous capacity demand of the indoor environment, return to the process of re-determining the instantaneous capacity demand.

In this embodiment, after determining that the current cooling operation is effective, it continues to determine whether the cooling amplitude is too large. If the cooling amplitude is too large, resulting in a large deviation between the indoor environment temperature and the preset temperature, the instantaneous capacity demand needs to be re-determined to adjust the cooling amplitude; If the cooling amplitude is within the allowable range, and the indoor environment temperature does not deviate from the preset temperature, the subsequent control process can be continued, thereby further improving the accuracy of the cooling control of the air conditioner system.

Further, after step A1, the method also includes:.

In this embodiment, if the air conditioner system determines that the indoor environment temperature after one action cycle is outside the temperature control range, the update demand value is still determined based on the indoor and outdoor environment temperatures after an action cycle. The update temperature value is determined to increase or decrease based on the numerical relationship between the indoor environment temperature and the preset temperature, and the increased or decreased update temperature value is used as the temperature correction value.

Specifically, if the difference between the indoor environment temperature and the preset temperature after an action cycle is greater than a certain preset threshold (positive number, which can be flexibly set according to actual needs), then the update temperature value is reduced by <NUM> degree Celsius; If the difference between the indoor environment temperature and the preset temperature after an action cycle is less than the negative number of a certain preset threshold, the temperature update threshold is increased by <NUM> degree Celsius.

The air conditioner system returns to the steps of determining the temperature difference and adjusting the operating frequency of the compressor based on the currently obtained temperature correction value until the current actual evaporation temperature reaches the corresponding target evaporation temperature.

It should be noted that when the air conditioner system needs to determine and update the instantaneous capacity demand and target evaporation temperature for multiple times, the update temperature value can be adjusted according to the relationship between the indoor temperature and the preset temperature. Non-clearing accumulation can be used.

As a specific embodiment, as shown in <FIG>.

In this embodiment, it is determined that the numerical relationship between the indoor environment temperature and the preset temperature after each action cycle is completed, and the adjustment range of the target evaporation temperature in this round is adjusted according to the relationship. The indoor environment temperature can be controlled to more close the preset temperature after each action cycle is completed, thereby further improving the accuracy of indoor temperature control.

Furthermore, based on the above second embodiment, a third embodiment of the refrigeration control method of an air conditioner of the present application is proposed. In this embodiment, step S21 includes:.

In this embodiment, the environmental information may specifically include room type information (room area, window area, wall area, room orientation, etc.), regional information, weather information, etc. The regional information refers to the information about the region where the air conditioner is located. Taking the Chinese region as an example, the regional information may be the northern region, the southern region, or the southern part of China, the central part of China, etc. The regional classification standards can be flexibly set according to actual needs. The weather information refers to the current weather information of the environment where the air conditioner is located, which may be sunny, cloudy, rainy, etc..

The instantaneous cooling load refers to the heat that needs to be taken away from the room in order to maintain the indoor environment temperature at a certain moment; the sensible heat load to be removed refers to the cooling load formed by the sensible heat to be removed in order to reduce the indoor environment temperature at a certain moment to the preset temperature of the indoor unit. The specific method for obtaining the instantaneous cooling load can be as follows: querying the database to obtain the instantaneous cooling load, the air conditioner system can obtain the indoor instantaneous cooling load (including roof load, exterior wall load, window heat transfer load, window heat transfer load and solar radiation load for accumulation) through querying the database in combination with room type, orientation and regional information; or by directly adopting the default value, the air conditioner system can directly adopt the default value of the instantaneous cooling load that is universal or corresponds to the current time period (such as one month) as the current indoor instantaneous cooling load; or by calculating based on specific formulas, users can input room-related information such as orientation, window area, region information, etc. and send the information to the air conditioner system, based on the information, the air conditioner system obtains the current weather information in the area and calculates the instantaneous cooling load of the room through a preset formula.

The instantaneous capacity demand is determined by calculating the instantaneous cooling load and the sensible heat load to be removed under the following formula. <MAT>
wherein Qload represents the instantaneous cooling load, the unit is kW.

As a specific embodiment, the instantaneous cooling load can be calculated according to the following formula. <MAT>
wherein Kwall represents the overall heat transfer coefficient of the wall, for example, it can be taken as <NUM> W/(m<NUM> · K) ; Kfloor represents the overall heat transfer coefficient of the roof and the bottom, for example, can be taken as <NUM> W /(m<NUM> ·K) ; L represents the side length of the standard room (the ground is considered a square) where the indoor unit is located, for example, the default L=<NUM>, H=<NUM> for a <NUM>-horse-power machine; the default L=<NUM>, H=<NUM> for a <NUM>-horse-power machine; the default L=<NUM>, H=<NUM> for a <NUM>-horse-power machine.

As a specific calculation method for the sensible heat load to be removed.

If the sensible heat load to be removed is represented by Qsensible in kW, the indoor environment temperature is represented by T<NUM> , and the preset temperature is represented by Ts, the calculation formula is:
<MAT>.

Wherein m represents the mass of the air in the standard room, the unit is kg; Cp represents the specific heat capacity of the air in the standard room, usually being <NUM>. 005kJ/(kg*k); τ represents the time constant, usually being <NUM>.

In this embodiment, according to the calculation methods for instantaneous cooling load, the sensible heat load to be removed, and the instantaneous capacity demand, the multi-dimensional information (room type information, weather information, regional information, etc.) corresponding to the environment where the air conditioner system is located, and the indoor and outdoor temperatures, the instantaneous capacity demand is obtained. As a result, the instantaneous capacity demand calculated by the air conditioner system can truly match the actual operating environment of the air conditioner. The value obtained by adding the instantaneous cooling load and the sensible heat load to be removed is used as the corresponding demand value of the instantaneous capacity demand, so that the instantaneous capacity demand calculated by the air conditioner is more accurate, thereby improving the accuracy of cooling control of the air conditioner system.

Further, before step S20, the method also includes:.

In this embodiment, the preset condition refers to whether the difference between the preset temperature and the indoor environment temperature is less than the preset temperature difference threshold. The air conditioner system detects the indoor environment temperature in real time since it enters cooling operation. If at a certain moment it is determined that the difference between the indoor environment temperature and the preset temperature is less than the preset temperature difference threshold, it is determined that the preset conditions are met at this time, thereby entering the subsequent control process.

In this embodiment, if the difference between the indoor temperature and the preset temperature is less than the preset temperature difference threshold, the entry condition for the cooling control process is met, thereby avoiding the problem of an unobvious cooling effect caused by the above cooling control process when the difference between the two temperatures is too large. In this way, the temperature can be controlled more effectively and accurately for small temperature differences.

Further, step S22 includes:
step S221, obtaining the initial temperature value by calculating a result of a rated power of the air conditioner, the initial demand value, the indoor temperature and the outdoor temperature under a preset functional relationship.

In this embodiment, if T<NUM>. target represents the target evaporation temperature, the target evaporation temperature is calculated as follows:
<MAT>.

Wherein a is a constant, T<NUM>. target represents the target evaporation temperature, the unit is °C; Qreq represents the instantaneous capacity demand, the unit is kW; Qrated represents the rated nominal capacity (that is, the above-mentioned rated power) of the indoor unit, the unit is kW; T<NUM> represents the indoor unit environment temperature, the unit is °C; T<NUM> represents outdoor environment temperature, the unit is °C.

As shown in <FIG>, this present application also provides a refrigeration control device of an air conditioner. The refrigeration control device of an air conditioner includes:.

The present application also provides an air conditioner.

The air conditioner includes a processor, a memory, a refrigeration control program of an air conditioner stored on the memory and executable on the processor. When the refrigeration control program of the air conditioner is executed by the processor, steps of the refrigeration control method of the air conditioner as described above are implemented.

For the method implemented when the refrigeration control program of the air conditioner is executed, reference may be made to various embodiments of the refrigeration control method of the air conditioner in the present application, which will not be described again here.

The present application also provides a computer readable storage medium.

A refrigeration control program of the air conditioner is stored on the computer readable storage medium of the present application. When the refrigeration control program of the air conditioner is executed by a processor, the steps of the refrigeration control method of the air conditioner as described above are implemented.

For the method implemented when the refrigeration control program of the air conditioner is executed, reference may be made to various embodiments of the refrigeration control method of the air conditioner of the present application, which will not be described again here.

The present application also provides a computer program product, which includes a computer program, The steps of the refrigeration control method of the air conditioner as described above are implemented when the computer program is executed by a processor.

For the method implemented when the computer program is executed, reference may be made to various embodiments of the refrigeration control method of the air conditioner of the present application, which will not be described again here.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity/operation/object from another entity/operation/object, and do not necessarily require or imply these any actual relationship or sequence between these entities/operations/objects. The terms "include", "comprise" or any other variations thereof are intended to encompass non-exclusive inclusions, so that a process, method, article or system literally including a series of elements includes not only those elements, but also other elements not expressly listed or inherent to such a process, method, article or system. Without further limitation, an element qualified by the phrase "including a. " does not preclude the existence of additional identical elements in the process, method, article or system that includes the element. As for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple. For relevant details, please refer to the partial description of the method embodiment. The device embodiments described above are merely illustrative, in which units illustrated as separate components may or may not be physically separate. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of the present application. Persons of ordinary skill in the art can understand and implement the method without any creative effort.

The above-mentioned serial numbers of the embodiments of the present application are only for description, and do not represent the advantages or disadvantages of the embodiments.

Claim 1:
A refrigeration control method of an air conditioner, characterized by comprising: after the air conditioner is running for refrigeration, detecting (S10) an indoor temperature, an outdoor temperature and an actual evaporation temperature of the air conditioner during operation; after the indoor temperature meets a preset condition, determining (S20) an instantaneous capacity demand of an indoor heat load according to a currently detected indoor temperature and a currently detected outdoor temperature, determining a target evaporation temperature according to the instantaneous capacity demand, and determining an operating frequency and an action cycle of a compressor of the air conditioner based on the target evaporation temperature and the actual evaporation temperature; and after controlling (S30) the compressor to run at the operating frequency for several action cycles, in response to that the actual evaporation temperature does not reach the target evaporation temperature, returning to perform the step of determining the instantaneous capacity demand of the indoor heat load according to the currently detected indoor temperature and the currently detected outdoor temperature until the air conditioner meets a preset stop condition.