CN115978739A

CN115978739A - Air conditioner operation mode switching method and device, computer equipment and storage medium

Info

Publication number: CN115978739A
Application number: CN202211618008.5A
Authority: CN
Inventors: 陈立德; 黄玉优; 林海佳; 刘泳杉; 陈忠玉; 汪澳林
Original assignee: Gree Electric Appliances Inc of Zhuhai; Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai; Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority date: 2022-12-15
Filing date: 2022-12-15
Publication date: 2023-04-18

Abstract

The application relates to an air conditioner operation mode switching method, an air conditioner operation mode switching device, computer equipment, a storage medium and a computer program product. The method comprises the following steps: acquiring the outdoor dry bulb temperature of the air conditioning unit, and comparing the outdoor dry bulb temperature with a preset critical temperature threshold value to obtain a comparison result; when the comparison result meets the switching condition, acquiring a target operation mode matched with the switching condition; determining the predicted temperature change trend of the environment where the air conditioning unit is located; and if the predicted temperature change trend is the same as the target temperature change trend of the target operation mode, controlling the air conditioning unit to operate in the target operation mode. By adopting the method, the condition that the air conditioning unit frequently switches the operation mode due to the fluctuation of the outdoor environment temperature can be effectively avoided, and the operation stability of the air conditioning unit is improved.

Description

Air conditioner operation mode switching method and device, computer equipment and storage medium

Technical Field

The present application relates to the field of air conditioning technologies, and in particular, to a method and an apparatus for switching an air conditioning operation mode, a computer device, a storage medium, and a computer program product.

Background

As is known, natural cooling is an energy-saving technology with a good energy-saving effect, so that a large amount of electricity charges are saved for users, and the strategy of global low-carbon energy conservation is also met. When the outdoor temperature is low in winter or transition seasons, the air conditioning system can utilize the outdoor temperature to carry out outdoor circulating heat release on the refrigerant, an outdoor natural cold source is fully utilized, and the energy consumption of the air conditioner is greatly reduced.

When the existing air conditioning unit is switched to an operation mode, the existing air conditioning unit is mainly judged according to the actual outdoor dry bulb temperature measured by a unit temperature sensing bulb and the preset critical temperature of the air conditioning unit, when the outdoor dry bulb temperature is lower than the critical temperature, the air conditioning unit is switched to a refrigeration operation mode, and heat exchange refrigeration is carried out by utilizing the larger temperature difference of indoor air and outdoor air, so that the cooling effect is realized. Because the outdoor environment temperature of the unit is greatly influenced by meteorological conditions, when the external environment temperature fluctuates around the critical temperature of the air conditioning unit due to the influence of the meteorological conditions, the unit frequently switches the operation mode, and the stability of the indoor working condition is influenced while the power consumption is increased.

Disclosure of Invention

In view of the above, it is necessary to provide an air conditioning operation mode switching method, an air conditioning operation mode switching apparatus, a computer device, a computer readable storage medium, and a computer program product, which can avoid frequent switching of operation modes of an air conditioning unit due to fluctuation of outdoor ambient temperature and improve operation stability of the air conditioning unit.

In a first aspect, the present application provides an air conditioner operation mode switching method, including:

the method comprises the steps of obtaining the outdoor dry bulb temperature of the air conditioning unit, and comparing the outdoor dry bulb temperature with a preset critical temperature threshold value to obtain a comparison result;

when the comparison result meets a switching condition, acquiring a target operation mode matched with the switching condition;

determining the predicted temperature change trend of the environment where the air conditioning unit is located;

and if the predicted temperature change trend is the same as the target temperature change trend of the target operation mode, controlling the air conditioning unit to operate in the target operation mode.

In one embodiment, determining the predicted temperature variation trend of the environment where the air conditioning unit is located includes:

acquiring a temperature change curve corresponding to the current time parameter; the method comprises the following steps of obtaining temperature change curves corresponding to different time parameters according to historical outdoor dry bulb temperatures of different time parameters of the environment where the air conditioning unit is located in advance;

and determining the predicted temperature change trend of the air conditioning unit according to the current time point and the temperature change curve.

In one embodiment, the method further comprises:

and correcting the predicted temperature change trend according to the actually measured temperature change trend of a first time period before the current time point and the actually measured temperature change trend of a second time period after the current time point.

In one embodiment, the correcting the predicted temperature variation trend according to the measured temperature variation trend of a first time period before the current time point and the measured temperature variation trend of a second time period after the current time point includes:

acquiring operation parameters and outdoor dry bulb temperature data of a first time period before the current time point;

determining the actually measured temperature change trend of the first time period according to the operating parameters of the first time period and the outdoor dry bulb temperature data;

acquiring operation parameters and outdoor dry bulb temperature data of a second time period after the current time point;

determining the actually measured temperature change trend of the second time period according to the operation parameters of the second time period and the outdoor dry bulb temperature data;

and if the actually measured temperature change trend of the first time period is different from the actually measured temperature change trend of the second time period, correcting the predicted temperature change trend.

In one embodiment, the predicted temperature trend comprises an upward trend or a downward trend;

if the measured temperature variation trend of the first time period is different from the measured temperature variation trend of the second time period, the correcting the predicted temperature variation trend includes:

and if the actually measured temperature change trend of the first time period is different from the actually measured temperature change trend of the second time period, correcting the rising trend or the falling trend into a fluctuation change trend.

In one embodiment, the method further comprises:

and if the predicted temperature change trend is different from the target temperature change trend of the target operation mode, maintaining the air conditioning unit to operate in the target operation mode.

In one embodiment, the obtaining the target operation mode matched with the switching condition when the comparison result satisfies the switching condition includes:

if the current operation mode of the air conditioning unit is a first operation mode, and the outdoor dry bulb temperature is greater than the lower limit value of the preset critical temperature, determining that the comparison result meets a switching condition, wherein a target operation mode matched with the switching condition is a second operation mode, and the target temperature change trend of the second operation mode is an ascending trend.

and if the current operation mode of the air conditioning unit is a second operation mode and the outdoor dry bulb temperature is less than the lower limit value of the preset critical temperature, determining that the comparison result meets a switching condition, wherein the target operation mode matched with the switching condition is a first operation mode, and the target temperature change trend of the first operation mode is a descending trend.

and if the current operation mode of the air conditioning unit is a second operation mode and the outdoor dry bulb temperature is greater than the upper limit value of the preset critical temperature, determining that the comparison result meets a switching condition, wherein a target operation mode matched with the switching condition is a third operation mode, and the target temperature change trend of the first operation mode is an ascending trend.

and if the current operation mode of the air conditioning unit is a third operation mode and the outdoor dry bulb temperature is less than the upper limit value of the preset critical temperature, determining that the comparison result meets a switching condition, wherein the target operation mode matched with the switching condition is a second operation mode, and the target temperature change trend of the second operation mode is a descending trend.

In a second aspect, the present application further provides an air conditioner operation mode switching device, including:

the temperature comparison module is used for acquiring the outdoor dry bulb temperature of the air conditioning unit, and comparing the outdoor dry bulb temperature with a preset critical temperature threshold value to obtain a comparison result;

the target operation mode determining module is used for acquiring a target operation mode matched with the switching condition when the comparison result meets the switching condition;

the variation trend determining module is used for determining the predicted temperature variation trend of the environment where the air conditioning unit is located;

and the control module is used for controlling the air conditioning unit to operate in the target operation mode if the predicted temperature change trend is the same as the target temperature change trend of the target operation mode.

In a third aspect, the present application further provides a computer device, which includes a memory and a processor, where the memory stores a computer program, and the processor implements the steps of the method when executing the computer program.

In a fourth aspect, the present application also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method described above.

In a fifth aspect, the present application also provides a computer program product comprising a computer program which, when executed by a processor, performs the steps of the method described above.

According to the air conditioner operation mode switching method, the device, the computer equipment, the storage medium and the computer program product, the outdoor dry bulb temperature of the air conditioner set acquired in real time is compared with the preset critical temperature threshold, when the comparison result meets the switching condition, the operation mode of the air conditioner set is not directly switched, but the target operation mode matched with the switching condition is acquired, the predicted temperature change trend of the environment where the air conditioner set is located is determined, the temperature change condition of the environment where the air conditioner set is located can be predicted through the predicted temperature change trend, the predicted temperature change trend is compared with the target temperature change trend of the target operation mode, if the predicted temperature change trend is the same as the target temperature change trend of the target operation mode, the environment where the air conditioner set is located can be considered to have no temperature fluctuation, the air conditioner set is controlled to operate in the target operation mode at the moment, the situation that the air conditioner set frequently switches the operation mode due to fluctuation of the outdoor environment temperature is effectively avoided, and the operation stability of the air conditioner set is improved.

Drawings

Fig. 1 is an application environment diagram of an air conditioner operation mode switching method according to an embodiment;

FIG. 2 is a flowchart illustrating an embodiment of a method for switching an air conditioner operation mode;

FIG. 3 is a schematic flowchart illustrating a step of correcting the predicted temperature variation trend according to the measured temperature variation trend of a first time period before the current time point and the measured temperature variation trend of a second time period after the current time point in one embodiment;

FIG. 4 is a schematic diagram of a fluorine pump air conditioning unit in the fluorine pump air conditioning system according to an embodiment;

FIG. 5 is a graph illustrating a temperature change curve according to an embodiment;

FIG. 6 is a flowchart illustrating a method for switching an air conditioner operation mode according to another embodiment;

FIG. 7 is a flowchart illustrating a method for switching an air conditioner operation mode according to another embodiment;

FIG. 8 is a flowchart illustrating a method for switching an air conditioner operation mode according to another embodiment;

fig. 9 is a flowchart illustrating a method for switching an operation mode of an air conditioner according to another embodiment;

FIG. 10 is a diagram illustrating an actual temperature variation curve when the outdoor dry bulb temperature is in a fluctuating state according to an embodiment;

fig. 11 is a block diagram showing the configuration of an air conditioner operation mode switching device according to an embodiment;

FIG. 12 is a diagram of an internal structure of a computer device in one embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The air conditioner operation mode switching method provided by the embodiment of the application can be applied to the application environment shown in fig. 1. Wherein the controller 102 communicates with the air conditioning unit 104. The data storage system may store data that the controller 102 needs to process. The data storage system may be integrated on the controller 102 or may be located on the cloud or other network server. The controller 102 obtains the outdoor dry bulb temperature of the air conditioning unit 104, compares the outdoor dry bulb temperature with a preset critical temperature threshold value to obtain a comparison result, obtains a target operation mode matched with the switching condition when the comparison result meets the switching condition, determines a predicted temperature change trend of the environment where the air conditioning unit 104 is located, and controls the air conditioning unit 104 to operate in the target operation mode if the predicted temperature change trend is the same as the target temperature change trend of the target operation mode. The controller 102 may be any control chip with data storage and logic processing capabilities. The controller 102 and the air conditioning unit 104 are integrated into one air conditioning system 100, and it is understood that the air conditioning system 100 may be any air conditioning system that controls the switching of the operation modes of the air conditioning unit by the outdoor dry bulb temperature, such as a multi-split air conditioning system, a fluorine pump air conditioning system, and the like.

In one embodiment, as shown in fig. 2, an air conditioner operation mode switching method is provided, which is described by taking the method as an example applied to the controller in fig. 1, and includes the following steps:

step 202, obtaining the outdoor dry bulb temperature of the air conditioning unit, and comparing the outdoor dry bulb temperature with a preset critical temperature threshold value to obtain a comparison result.

Wherein the dry bulb temperature is a value read from a dry bulb temperature chart exposed to air without direct irradiation of the sun. It is the temperature measured by the thermometer in ordinary air, i.e. what we often say in the weather forecast. The dry bulb temperature is generally considered to be the actual temperature of the measured air, independent of the current humidity level in the air. The outdoor dry bulb temperature of the air conditioning unit is the measured temperature of the environment where the air conditioning unit is located. It can be understood that the outdoor dry bulb temperature of the air conditioning unit can be obtained by any temperature collecting device, for example, the outdoor ambient temperature can be collected by a temperature sensing bulb arranged at the outdoor unit of the air conditioning unit.

The preset critical temperature threshold is a preset temperature value used for judging whether the air conditioning unit meets the operation mode switching condition. The preset critical temperature threshold value is determined by technicians according to the function and capacity parameters of the air conditioning unit, and the critical temperature values of the air conditioning unit under different functions and different capacities are different. It is understood that the predetermined threshold temperature is also related to the type of the cooling operation mode of the air conditioning unit, for example, if there are only two cooling operation modes in the air conditioning unit, the predetermined threshold temperature is a single temperature threshold parameter. If there are three refrigeration operation modes in the air conditioning unit, the preset temperature threshold may be a temperature interval including an upper limit value and a lower limit value, and so on.

Specifically, the outdoor dry bulb temperature of the air conditioning unit at the current time point of the controller is adjusted to a preset critical temperature threshold value which is preset and stored, and the outdoor dry bulb temperature is compared with the preset critical temperature threshold value to obtain a comparison result.

And step 204, when the comparison result meets the switching condition, acquiring a target operation mode matched with the switching condition.

The switching condition is a temperature condition for judging whether the air conditioner meets mode switching. It can be understood that there are multiple refrigeration operation modes in the air conditioning system, and the refrigeration mode corresponding to each refrigeration mode is different, and the energy consumption during refrigeration is also different. Each refrigeration operation mode corresponds to a temperature requirement, a designer generates a corresponding switching condition according to the temperature requirement of each refrigeration operation mode, and the switching condition and the corresponding refrigeration operation mode are bound and stored in a storage system of the controller in advance.

Specifically, the controller compares the outdoor dry bulb temperature with a preset critical temperature threshold, if the comparison result meets the switching condition, the controller obtains a refrigeration operation mode matched with the switching condition according to the switching condition, and the refrigeration operation mode is determined as a target operation mode of the air conditioning unit.

And step 206, determining the predicted temperature change trend of the environment where the air conditioning unit is located.

The predicted temperature variation trend may be used to predict a temperature variation of an environment where the air conditioning unit is currently located, for example, whether the environment temperature of the environment where the air conditioning unit is located is in a continuously rising, falling, or unstable state. The predicted temperature change trend can be determined according to the historical outdoor dry bulb temperature of the environment where the air conditioning unit is located.

Specifically, the controller determines the predicted temperature variation trend of the environment where the air conditioning unit is located according to the environment where the air conditioning unit is located.

And step 208, if the predicted temperature change trend is the same as the target temperature change trend of the target operation mode, controlling the air conditioning unit to operate in the target operation mode.

The target temperature change trend of the target operation mode refers to a temperature change trend corresponding to the switching of the air conditioning unit from the current operation mode to the target operation mode. The target temperature change trend of the target operation mode can be determined according to the energy consumption of the current operation mode and the target operation mode of the air conditioning unit, and the same target operation mode can have different target temperature change trends. For example, if the energy consumption of the current operation mode of the air conditioning unit is lower than that of the target operation mode, the target temperature variation trend of the target operation mode may be a temperature reduction trend, and conversely, if the energy consumption of the current operation mode of the air conditioning unit is higher than that of the target operation mode, the target temperature variation trend of the target operation mode may be a temperature increase trend.

Specifically, the controller determines a target temperature change trend of the target operation mode according to the current operation mode and the target operation mode of the air conditioning unit, compares the obtained predicted temperature change trend of the environment where the air conditioning unit is located with the target temperature change trend of the target operation mode, and if the predicted temperature change trend is the same as the target temperature change trend of the target operation mode, the temperature change condition of the environment where the air conditioning unit is located at the moment can be considered to be stable and meet the requirement of mode switching, and the controller controls the air conditioning unit to operate in the target operation mode.

According to the air conditioner operation mode switching method, the outdoor dry bulb temperature of the air conditioning unit acquired in real time is compared with the preset critical temperature threshold, when the comparison result meets the switching condition, the operation mode of the air conditioning unit is not directly switched, but a target operation mode matched with the switching condition is acquired, the predicted temperature change trend of the environment where the air conditioning unit is located is determined, the temperature change situation of the environment where the air conditioning unit is located can be predicted by predicting the temperature change trend, the predicted temperature change trend is compared with the target temperature change trend of the target operation mode, if the predicted temperature change trend is the same as the target temperature change trend of the target operation mode, the environment where the air conditioning unit is located can be considered to be free of temperature fluctuation, the air conditioning unit is controlled to operate in the target operation mode, the situation that the air conditioning unit frequently switches the operation mode due to outdoor environment temperature fluctuation is effectively avoided, and the operation stability of the air conditioning unit is improved.

Therefore, in an embodiment, determining the predicted temperature variation trend of the environment where the air conditioning unit is located includes:

and acquiring a temperature change curve corresponding to the current time parameter, wherein the temperature change curve corresponding to different time parameters is obtained in advance according to the historical outdoor dry bulb temperatures of the different time parameters of the environment where the air conditioning unit is located.

Specifically, a technician obtains historical outdoor dry bulb temperatures of the environment where the air conditioning unit is located in a preset historical time period in a segmented manner according to different time parameters in advance, and generates temperature change curves corresponding to the different time parameters according to the historical outdoor dry bulb temperatures of the different time parameters. The time parameter may be a time interval with a specific meteorological change, such as season, solar terms, months, etc. For example, if the predetermined historical time period is one year, the temperature change curves corresponding to the seasons may be generated based on the seasons included in the one year, such as spring, summer, fall, and winter, or the temperature change curves corresponding to the solar term sections may be generated based on the 24 solar term sections included in the one year, or the temperature change curves corresponding to the 12 months in the one year may be generated. The specific time parameter can be determined according to actual use requirements.

In one embodiment, the generating the temperature change curves corresponding to different time parameters according to the historical outdoor dry bulb temperatures of the different time parameters respectively comprises: historical meteorological data of the environment where the air conditioning unit is located in a preset time period are obtained, and historical outdoor dry bulb temperature data of the environment where the air conditioning unit is located in the preset time period are obtained according to the historical meteorological data. And dividing the historical outdoor dry bulb temperature data according to different time parameters, and generating a temperature change curve corresponding to each time parameter according to the divided historical outdoor dry bulb temperature data. It will be appreciated that the historical weather data may be obtained by the controller from a weather server, or the historical weather data may be factory or remotely written into the controller's storage system by a technician.

Specifically, the controller may determine a time period of the current time point in the temperature change curve according to the current time point, and determine a predicted temperature change trend of the air conditioning unit according to the time period.

In the embodiment, the temperature change curves corresponding to different time parameters are generated according to the historical outdoor dry bulb temperatures of the different time parameters, the predicted temperature change trend of the air conditioning unit can be rapidly read from the temperature change curves according to the current time point, and a basis is provided for judging whether the operation mode needs to be switched or not in the follow-up process.

Since the predicted temperature variation trend is obtained according to the historical outdoor dry bulb temperature data, in order to avoid that the predicted temperature variation tends to have errors, in one embodiment, the air conditioner operation mode switching method further comprises the following steps: and correcting the predicted temperature change trend according to the actually measured temperature change trend of a first time period before the current time point and the actually measured temperature change trend of a second time period after the current time point.

The first time period before the current time point and the second time period after the current time point are both preset time parameters by designers according to related operation parameters of the air conditioning unit, such as the minimum operation time of a compressor, the minimum starting time of the compressor and the like, and the first time period and the second time period which are correspondingly set by the air conditioning units with different functions and different refrigeration capacities are different.

Specifically, the controller determines, according to the current time point, an actual temperature variation trend of a first time period before the current time point, and the actual temperature variation trend of the first time period may represent the temperature variation trend before the current time point. The actually measured temperature change trend of the second time period after the current time point is determined according to the current time point, the actually measured temperature change trend of the second time period can represent the temperature change trend after the current time point, the actually measured temperature change trend of the current time point can be obtained based on the temperature change trend before the current time point and the temperature change trend after the current time point, the predicted temperature change trend is corrected, and the accuracy of the predicted temperature change trend is improved.

In one embodiment, the first time period is greater than the second time period. Specifically, the first time period is sufficiently large in a proper range to ensure stability of the temperature change trend before the current time point is judged, the second time period can be a time period which is properly prolonged after the current time point, and the second time period is mainly set to reduce influence caused by sensitivity of time required by unit switching modes and delay of unit operation parameter change relative to temperature change for a certain time so as to ensure accuracy of a subsequent judgment result. Therefore, when the first time period and the second time period are set in advance, the first time period may be larger than the second time period, and for example, if the first time period is set to about 30min, the second time period may be set to about 5 min.

Further, as shown in fig. 3, correcting the predicted temperature variation trend according to the measured temperature variation trend of the first time period before the current time point and the measured temperature variation trend of the second time period after the current time point includes:

step 302, obtaining the operation parameters and outdoor dry bulb temperature data of a first time period before the current time point.

The operation parameters are state parameters recorded when the air conditioning unit operates in the current refrigeration mode, such as the rotating speed of a fan, the operation frequency of a compressor and the like.

Specifically, the controller acquires the operation parameters and outdoor dry bulb temperature data recorded when the air conditioning unit operates the current refrigeration mode in a first time period before the current time point.

And step 304, determining the actually measured temperature change trend of the first time period according to the operation parameters of the first time period and the outdoor dry bulb temperature data.

Specifically, the controller determines the actually measured temperature change trend of the environment where the air conditioning unit is located in the first time period according to the acquired operating parameters of the first time period and the outdoor dry bulb temperature data.

And step 306, acquiring the operating parameters and outdoor dry bulb temperature data of a second time period after the current time point.

Specifically, the controller acquires the operation parameters and outdoor dry bulb temperature data recorded when the air conditioning unit operates the current refrigeration mode in a second time period before the current time point.

And 308, determining the actually measured temperature change trend of the second time period according to the operation parameters of the second time period and the outdoor dry bulb temperature data.

Specifically, the controller determines the actually measured temperature change trend of the environment where the air conditioning unit is located in the second time period according to the acquired operation parameters of the second time period and the outdoor dry bulb temperature data.

In step 310, if the measured temperature variation trend of the first time period is different from the measured temperature variation trend of the second time period, the predicted temperature variation trend is corrected.

Specifically, if the actually measured temperature variation trend of the first time period is different from the actually measured temperature variation trend of the second time period, it is described that the actually measured temperature variation trend of the environment where the air conditioning unit is located in the first time period is different from the actually measured temperature variation trend of the environment where the air conditioning unit is located in the second time period, that is, the actually measured temperature variation trend of the environment where the air conditioning unit is located is different before and after the current time point, and at this time, the predicted temperature variation trend is inaccurate and needs to be corrected. The controller corrects the predicted temperature variation trend and updates the corrected temperature variation trend into the predicted temperature variation trend.

In the embodiment, whether the predicted temperature change trend obtained by the controller is accurate or not is judged by combining the unit operation parameters in two fixed time periods before and after the current time point and the outdoor dry bulb temperature data, and when the predicted temperature change trend is inaccurate, the predicted temperature change trend is corrected, so that the accuracy of the predicted temperature change trend is effectively improved, and the condition that the operation mode switching judgment is mistaken due to inaccuracy of the predicted temperature change trend is avoided.

In an embodiment, if the measured temperature variation trend of the first time period is different from the measured temperature variation trend of the second time period, the correcting the predicted temperature variation trend includes: and if the actually measured temperature change trend of the first time period is different from the actually measured temperature change trend of the second time period, correcting the rising trend or the falling trend into a fluctuation change trend.

Specifically, if the measured temperature variation trend of the first time period is different from the measured temperature variation trend of the second time period, it indicates that the outdoor environment temperature of the air conditioning unit in a short time has an opposite variation trend, and the outdoor environment temperature of the air conditioning unit is likely to fluctuate due to the influence of weather variation. At this time, no matter the predicted temperature variation trend of the environment where the air conditioning unit is located is an ascending trend or a descending trend, the controller corrects the predicted temperature variation trend into a fluctuation variation trend. By correcting the predicted temperature change trend, the accuracy of the predicted temperature change trend is effectively improved, and the condition that the judgment error of the operation mode switching is caused by inaccuracy of the predicted temperature change trend is favorably avoided.

The purpose of predicting the temperature variation trend of the environment where the air conditioning unit is located is to determine whether to switch the cooling mode in which the air conditioning unit operates. In one embodiment, the air conditioner operation mode switching method further includes:

Specifically, since the target temperature variation trend of the target operation mode refers to a temperature variation trend corresponding to switching the air conditioning unit from the current operation mode to the target operation mode, if it is predicted that the temperature operation variation trend is different from the target temperature variation trend, it is indicated that the temperature variation condition of the current air conditioning unit does not meet the requirement of mode switching, and if the refrigeration mode of the air conditioning unit is switched to the target operation mode at this time, the condition of frequently switching the air conditioning operation mode in a short time is easily caused. Therefore, when the controller determines that the predicted temperature variation trend is different from the target temperature variation trend of the target operation mode, the controller determines the current cooling operation mode of the air conditioning unit as the target operation mode, and controls the air conditioning unit to maintain the operation in the target operation mode, namely the current cooling mode.

In this embodiment, when the predicted temperature variation trend is different from the target temperature variation trend of the target operation mode, the air conditioning unit is controlled to maintain the operation in the current refrigeration mode, so that the situation that the air conditioning unit frequently switches the refrigeration operation mode in a short time due to temperature variation can be effectively avoided, and the operation stability of the air conditioning unit is improved.

How to determine the key step of controlling the air conditioning unit to switch the mode when the target operation mode of the air conditioning unit needs to be switched is determined, the air conditioning operation mode switching method in the application can be applied to any air conditioning system which controls the air conditioning unit to switch the operation mode by the participation of the outdoor dry bulb temperature, and in order to describe the specific implementation mode of each step of the air conditioning operation mode switching method, in the subsequent embodiments, the application will use a fluorine pump air conditioning system for example.

In one embodiment, a schematic structural diagram of a fluorine pump air conditioning unit in a fluorine pump air conditioning system is shown in fig. 4, and main components of the unit comprise a compressor, an oil separator, a condenser, a liquid storage tank, a fluorine pump, an expansion valve and an evaporator. The air-conditioning refrigeration system is different from a traditional compression refrigeration system in that a fluorine pump is additionally added. The fluorine pump is connected in parallel between the liquid storage tank and the expansion valve, a first one-way switch (one-way valve 1) is arranged in parallel with the fluorine pump, the compressor is arranged between the condenser and the evaporator, and a second one-way switch (one-way valve 2) is arranged in parallel with the compressor. It will be understood that the controller and its corresponding components in the air conditioning system are not shown in the figures.

In the fluorine pump air conditioning unit, the number of the refrigeration modes is generally three, and technicians can sort the refrigeration modes of the air conditioning unit in an ascending order according to the energy consumed when the air conditioning unit runs various refrigeration modes in advance to obtain an optimal refrigeration mode sequence.

The optimal refrigeration mode sequence of the fluorine pump air conditioning unit can be obtained by ascending order according to the optimal energy consumption, and the optimal refrigeration mode sequence sequentially comprises the following steps: a fluorine pump refrigeration mode, a hybrid refrigeration mode, and a compressor refrigeration mode.

The fluorine pump refrigeration mode is a refrigeration operation mode which directly exchanges heat between a refrigerant and an outdoor cold source to achieve the refrigeration purpose, and the fluorine pump refrigeration mode directly exchanges heat with the outdoor environment temperature without extra work, so that the corresponding energy consumption is the lowest, and the fluorine pump refrigeration mode is the optimal refrigeration operation mode, namely the first operation mode. Specifically, when the air conditioning unit is switched to a fluorine pump refrigeration mode, the compressor stops working, the fluorine pump is started, the refrigerant in the evaporator after exchanging heat with indoor air flows through the second one-way switch and directly enters the condenser to exchange heat with an outdoor cold source, and the refrigerant after being cooled into a liquid state overcomes the pipe resistance under the action of the fluorine pump and returns to the evaporator for continuous heat exchange, so that the energy-saving effect is achieved.

The mixed refrigeration mode refers to a refrigeration operation mode in which a part of the refrigerant is used for directly exchanging heat with an outdoor cold source and a part of the refrigerant is used for exchanging heat with a user compressor. The hybrid cooling mode is used as the second operation mode because a part of the refrigerant exchanges heat with the outdoor ambient temperature directly, so that the energy consumption is lower compared with the pure compressor cooling operation mode.

The compressor refrigeration mode is a refrigeration operation mode in which all refrigerants exchange heat through the compressor to achieve the purpose of refrigeration, and because the energy consumed by refrigeration in the compressor refrigeration mode is higher than that in the fluorine pump refrigeration mode and the mixed refrigeration mode, the compressor refrigeration mode is used as the third operation mode. Specifically, when the air conditioning unit is switched to a compressor refrigeration mode, the fluorine pump stops running, the compressor starts working, and a refrigerant in the evaporator after exchanging heat with indoor air flows through the first one-way switch, so that the refrigeration purpose is achieved.

The fluorine pump air conditioning unit has three refrigeration operation modes, so that the corresponding preset critical temperature of the air conditioning unit is a preset critical temperature interval which comprises an upper limit value and a lower limit value. It is understood that the lower limit of the preset critical temperature is a temperature boundary between the fluorine pump refrigeration operation mode and the hybrid refrigeration operation mode, and the upper limit of the preset critical temperature is a temperature boundary between the hybrid refrigeration mode and the compressor refrigeration mode.

In one embodiment, when the comparison result satisfies the switching condition, acquiring the target operation mode matching the switching condition includes: if the current operation mode of the air conditioning unit is the first operation mode and the outdoor dry bulb temperature is larger than the lower limit value of the preset critical temperature, the comparison result is determined to meet the switching condition, the target operation mode matched with the switching condition is the second operation mode, and the target temperature change trend of the second operation mode is the rising trend.

Specifically, if the current operation mode of the air conditioning unit is the first operation mode, and the outdoor dry bulb temperature is greater than the lower limit value of the preset critical temperature, it indicates that the air conditioning unit is operating the fluorine pump refrigeration mode at this time, and the outdoor temperature has risen, so that the switching condition of the refrigeration mode is met, the air conditioning unit is not suitable for continuing to operate the fluorine pump refrigeration mode, but should prepare to operate the hybrid refrigeration mode, that is, the second operation mode, and at this time, the corresponding target temperature change trend should be an increasing trend.

In this embodiment, when the current operation mode of the air conditioning unit is the first operation mode, and the outdoor dry bulb temperature has risen and breaches the critical value of the mode switching, the controller quickly selects the target operation mode of the air conditioning unit according to the preset refrigeration mode sequence, and determines the target temperature variation trend corresponding to the target operation mode, so as to provide a data basis for whether the subsequent air conditioning unit needs to perform the mode switching, and specifically which mode switching is to be performed.

In one embodiment, if the predicted temperature variation trend of the air conditioning unit is a descending trend or a fluctuation trend, it indicates that the temperature of the subsequent air conditioning unit may be reduced at any time, which may cause the outdoor dry bulb temperature to be lower than the lower limit of the preset critical temperature. Therefore, if the predicted temperature variation trend is not the same as the target temperature variation trend, namely the predicted temperature variation trend is an ascending trend, the controller controls the air conditioning unit to continuously maintain the first operation mode, namely the fluorine pump refrigeration mode.

In one embodiment, when the comparison result satisfies the switching condition, obtaining the target operation mode matching with the switching condition includes: if the current operation mode of the air conditioning unit is the second operation mode and the outdoor dry bulb temperature is smaller than the lower limit value of the preset critical temperature, determining that the comparison result meets the switching condition, wherein the target operation mode matched with the switching condition is the first operation mode, and the target temperature change trend of the first operation mode is the descending trend.

Specifically, if the current operation mode of the air conditioning unit is the second operation mode, and the outdoor dry bulb temperature is less than the lower limit value of the preset critical temperature, it is indicated that the air conditioning unit is operating in the hybrid refrigeration mode at this time, and the outdoor temperature has been reduced to the lower limit value of the preset critical temperature, an external cold source can be completely used to exchange heat with the refrigerant in the air conditioning unit, so as to achieve the purpose of refrigeration, at this time, the air conditioning unit meets the switching condition of the refrigeration mode, the air conditioning unit is not suitable for continuing to operate in the hybrid refrigeration mode, but a fluorine pump refrigeration mode with optimal energy consumption, that is, the first operation mode, should be prepared to operate in the fluorine pump refrigeration mode, and at this time, the corresponding target temperature change trend should be a downward trend.

In this embodiment, when the current operation mode of the air conditioning unit is the second operation mode, and the outdoor dry bulb temperature has decreased and broken through the critical value of the mode switching, the controller quickly selects the target operation mode of the air conditioning unit according to the preset refrigeration mode sequence, and determines the target temperature variation trend corresponding to the target operation mode, thereby providing a data basis for whether the subsequent air conditioning unit needs to perform the mode switching, and specifically which mode switching is performed.

In one embodiment, if the predicted temperature variation trend of the air conditioning unit is an ascending trend or a fluctuation trend, it indicates that the temperature of the subsequent air conditioning unit may rise at any time, which may cause the outdoor dry bulb temperature to be higher than the lower limit of the preset critical temperature. Therefore, if the predicted temperature variation trend is not the same as the target temperature variation trend, namely, both the predicted temperature variation trend and the target temperature variation trend are downward trends, the controller controls the air conditioning unit to continuously maintain the second operation mode, namely, the hybrid refrigeration mode.

In one embodiment, when the comparison result satisfies the switching condition, acquiring the target operation mode matching the switching condition includes: and if the current operation mode of the air conditioning unit is the second operation mode and the outdoor dry bulb temperature is greater than the upper limit value of the preset critical temperature, determining that the comparison result meets the switching condition, wherein the target operation mode matched with the switching condition is the third operation mode, and the target temperature change trend of the first operation mode is an ascending trend.

Specifically, if the current operation mode of the air conditioning unit is the second operation mode, and the outdoor dry bulb temperature is greater than the upper limit value of the preset critical temperature, it is indicated that the air conditioning unit is operating in the hybrid refrigeration mode at this time, the outdoor temperature has risen and has broken through the upper limit value of the preset critical temperature, the outdoor environment temperature cannot perform partial heat exchange for the refrigerator at this time, so as to achieve the refrigeration effect, the air conditioning unit meets the switching condition of the refrigeration mode, the air conditioning unit is not suitable for continuing to operate in the hybrid refrigeration mode, but a compressor refrigeration mode with the highest energy consumption, that is, a third operation mode, is prepared, and the compressor works to perform heat exchange for the refrigerant, so as to achieve the refrigeration purpose. The corresponding target temperature variation trend at this time should be an ascending trend.

In this embodiment, when the current operation mode of the air conditioning unit is the second operation mode, and the outdoor dry bulb temperature has risen and breaches the critical value of the mode switching, the controller quickly selects the target operation mode of the air conditioning unit according to the preset refrigeration mode sequence, and determines the target temperature variation trend corresponding to the target operation mode, so as to provide a data basis for whether the subsequent air conditioning unit needs to perform the mode switching, and specifically which mode switching is to be performed.

In one embodiment, if the predicted temperature variation trend of the air conditioning unit is a descending trend or a fluctuation trend, it indicates that the temperature of the subsequent air conditioning unit may be reduced at any time, which may cause the outdoor dry bulb temperature to be lower than the upper limit value of the preset critical temperature. Therefore, if the predicted temperature variation trend is not the same as the target temperature variation trend, namely is an ascending trend, the controller controls the air conditioning unit to continuously maintain the second operation mode, namely the mixed refrigeration mode.

In one embodiment, when the comparison result satisfies the switching condition, acquiring the target operation mode matching the switching condition includes: if the current operation mode of the air conditioning unit is the third operation mode and the outdoor dry bulb temperature is smaller than the upper limit value of the preset critical temperature, determining that the comparison result meets the switching condition, wherein the target operation mode matched with the switching condition is the second operation mode, and the target temperature change trend of the second operation mode is the descending trend.

Specifically, if the current operation mode of the air conditioning unit is the third operation mode, and the outdoor dry bulb temperature is lower than the upper limit value of the preset critical temperature, it indicates that the air conditioning unit is operating in the compressor refrigeration mode at this time, and the outdoor temperature has been reduced to below the upper limit value of the preset critical temperature, and at this time, the outdoor environment temperature is low, although the outdoor environment temperature cannot be completely relied on to exchange heat for the refrigerant in the air conditioning unit, so as to achieve the refrigeration purpose, a part of the refrigerant can be exchanged heat, and the refrigeration purpose can be achieved while the effect is effectively reduced. At the moment, the air conditioning unit meets the switching condition of the refrigeration mode, the air conditioning unit can prepare a mixed refrigeration mode with low operation energy consumption, namely a second operation mode, and heat exchange is carried out on the refrigerant while the compressor works by taking the outdoor environment temperature as a cold source so as to achieve the purpose of refrigeration. The corresponding target temperature variation trend at this time should be a downward trend.

In this embodiment, when the current operation mode of the air conditioning unit is the third operation mode, and the outdoor dry bulb temperature has decreased and broken through the critical value of the mode switching, the controller quickly selects the target operation mode of the air conditioning unit according to the preset refrigeration mode sequence, and determines the target temperature variation trend corresponding to the target operation mode, thereby providing a data basis for whether the subsequent air conditioning unit needs to perform the mode switching, and specifically which mode switching is performed.

In one embodiment, if the predicted temperature variation trend of the air conditioning unit is an ascending trend or a fluctuation trend, it indicates that the temperature of the subsequent air conditioning unit may rise at any time, which may cause the outdoor dry bulb temperature to be higher than the upper limit of the preset critical temperature. Therefore, if the predicted temperature variation trend is not the same as the target temperature variation trend, namely, both the predicted temperature variation trend and the target temperature variation trend are downward trends, the controller controls the air conditioning unit to continuously maintain the third operation mode, namely, the compressor refrigeration mode.

In one embodiment, an air conditioner operation mode switching method is provided, and the method is applied to a fluorine pump air conditioning unit as an example.

Firstly, when the fluorine pump unit is installed, technicians obtain the outdoor dry bulb temperature of the environment where the air conditioning unit is located every day from time to time and analyze the general lifting trend of the outdoor dry bulb temperature, 24 hours every day is divided into a heating time period and a cooling time period according to three working conditions of summer, winter and transition seasons to generate a daily temperature change curve, and the daily temperature change curve can be shown in fig. 5. Taking southern city a as an example: if the summer day is long and the summer night is short, 16 to the next day 06; 06, 00; the winter day is short and long, and 14; 08; transition season 15; 07.

Meanwhile, a technician presets a numerical value of the critical temperature according to the refrigerating capacity of the unit, and the preset critical temperature threshold interval includes an upper limit value and a lower limit value, wherein the upper limit value is the critical temperature 1 in fig. 5 and is a boundary between the hybrid refrigeration mode and the compressor refrigeration mode, the lower limit value is the critical temperature 2 in fig. 5 and is a boundary between the fluorine pump refrigeration mode and the hybrid refrigeration mode.

When the air conditioning unit is installed and starts to operate, if the current operation mode of the air conditioning unit is the compressor refrigeration mode, as shown in a time point T3 in fig. 5, as shown in fig. 6, the controller firstly obtains the outdoor dry bulb temperature of the air conditioning unit, compares the outdoor dry bulb temperature with a preset critical temperature threshold interval, if the outdoor dry bulb temperature is lower than a critical temperature 1 and higher than a critical temperature 2, the initial judgment condition of mode switching is met, and the air conditioning unit is considered to initially have the condition of switching from the compressor refrigeration mode to the hybrid refrigeration mode at this time. Then, the controller identifies the season of the current day according to the current time point T3, obtains corresponding daily temperature rise and drop time period division according to the season, and if the time point T3 is in the daily temperature drop time period, the air conditioning unit is considered to meet a second judgment condition. And finally, the controller acquires the rotating speed of the fan outside the air conditioning unit and the outdoor dry bulb temperature data monitored by the system within the time delta T before the time point T3, if the rotating speed of the fan and the outdoor dry bulb temperature both show a general descending trend, the control system enters a detection mode, and if the rotating speed of the fan and the outdoor dry bulb temperature data within the next time delta T after the time point T3 still show a general descending trend, the air conditioning unit is considered to meet a third judgment condition. And the controller switches the air conditioning unit from the compressor refrigeration mode to the mixed refrigeration mode.

If the air conditioning unit is in the hybrid refrigeration mode during operation, for example, at a time point T4 in fig. 5, as shown in fig. 7, the controller first obtains an outdoor dry bulb temperature of the air conditioning unit, compares the outdoor dry bulb temperature with a preset critical temperature threshold interval, and if the outdoor dry bulb temperature is lower than a critical temperature 2, the air conditioning unit is considered to meet an initial determination condition at that time, that is, a condition for switching from the hybrid refrigeration mode to the fluorine pump refrigeration mode is preliminarily met. Then, the controller identifies the season of the current day according to the current time point T4, obtains corresponding daily temperature rise and fall time period division according to the season, and if the time point T4 is in the daily temperature fall time period, the air conditioning unit is considered to meet a second judgment condition. And finally, the controller acquires the rotating speed of the fan outside the air conditioning unit and the outdoor dry bulb temperature data monitored by the system within the time delta T before the time T4, if the rotating speed of the fan and the outdoor dry bulb temperature both show a general descending trend, the control system enters a detection mode, and if the rotating speed of the fan and the outdoor dry bulb temperature data within the next time delta T after the time T4 and the rotating speed of the fan and the outdoor dry bulb temperature within the next delta T still show a general descending trend, the air conditioning unit is considered to meet a third judgment condition. Therefore, the air conditioning unit meets the mode switching condition in the three-stage judgment logic, and the controller switches the air conditioning unit from the hybrid refrigeration mode to the fluorine pump refrigeration mode.

If the air conditioning unit is in the fluorine pump refrigeration mode during operation, for example, at a time point T1 in fig. 5, as shown in fig. 8, the controller first obtains an outdoor dry bulb temperature of the air conditioning unit, compares the outdoor dry bulb temperature with a preset critical temperature threshold interval, and if the outdoor dry bulb temperature is higher than a critical temperature 2 and lower than the critical temperature 1, the air conditioning unit is considered to satisfy an initial determination condition at this time, that is, a condition for switching the fluorine pump refrigeration mode to the hybrid refrigeration mode is preliminarily satisfied. Then, the controller identifies the season of the current day according to the current time point T1, obtains corresponding daily temperature rise and drop time period division according to the season, and if the time point T1 is in the daily temperature rise time period, the air conditioning unit is considered to meet a second judgment condition. And finally, the controller acquires the rotating speed of the fan outside the air conditioning unit and the outdoor dry bulb temperature data which are monitored by the system within the time delta T before the time point T1, if the rotating speed of the fan and the outdoor dry bulb temperature both show a general rising trend, the control system enters a detection mode, and if the rotating speed of the fan and the outdoor dry bulb temperature data within the next time delta T after the time point T1 still show a general rising trend, the air conditioning unit is considered to meet a third judgment condition. And the controller switches the air conditioning unit from the fluorine pump refrigeration mode to the mixed refrigeration mode.

If the air conditioning unit is in the hybrid refrigeration mode during operation, for example, at a time point T2 in fig. 5, as shown in fig. 9, the controller first obtains an outdoor dry bulb temperature of the air conditioning unit, compares the outdoor dry bulb temperature with a preset critical temperature threshold interval, and if the outdoor dry bulb temperature is higher than a critical temperature 1, the air conditioning unit is considered to meet an initial determination condition at that time, that is, a condition for switching from the hybrid refrigeration mode to the compressor refrigeration mode is preliminarily met. Then, the controller identifies the season of the current day according to the current time point T2, obtains corresponding daily temperature rise and drop time period division according to the season, and if the time point T2 is in the daily temperature rise time period, the air conditioning unit is considered to meet a second judgment condition. And finally, the controller acquires the rotating speed of the fan outside the air conditioning unit and the outdoor dry bulb temperature data which are monitored by the system within the time delta T before the time point T2, if the rotating speed of the fan and the outdoor dry bulb temperature both show a general rising trend, the control system enters a detection mode, and if the rotating speed of the fan and the outdoor dry bulb temperature data within the next time delta T after the time point T2 still show a general rising trend, the air conditioning unit is considered to meet a third judgment condition. And the controller switches the air conditioning unit from the mixed refrigeration mode to the compressor refrigeration mode.

It can be understood that in the above three stages of judgment logic flows, if any node does not satisfy the condition, it indicates that the outdoor dry bulb temperature of the air conditioning unit is in a fluctuation state at this time, and the controller cannot output the mode switching command.

For example, when the outdoor dry bulb temperature is in a fluctuating state, the actual temperature change curve thereof is shown in fig. 10, which is exemplified by the time point T5 in fig. 10, the controller obtains the outdoor dry bulb temperature of the air conditioning unit, compares the outdoor dry bulb temperature with the preset threshold temperature threshold interval, and may determine that the outdoor dry bulb temperature is lower than the threshold temperature 2 and is in the cooling time period at the time point T5, and the external fan speed of the unit and the outdoor dry bulb temperature are both in the overall downward trend in the Δ T time period before the time point T5. However, in the time period of delta T after the time point of T5, the temperature of the outdoor dry bulb presents an ascending trend, and the rotating speed of the fan outside the unit still presents a descending trend, so that the control system does not output a command for switching the refrigeration mode. And the unit is in a mixed refrigeration mode in a time period of the T5 time point, the temperature of the outdoor dry bulb frequently fluctuates around the critical temperature, and the time period macroscopically belongs to a cooling time period obtained according to the previous meteorological condition and time-by-time outdoor dry bulb temperature analysis. In fact, the outdoor dry bulb temperature in the cooling time period needs a long time to stably drop below the critical temperature, and is in a frequent fluctuation state before the temperature drop, and at this time, if the temperature drop is switched to the fluorine pump cooling mode, the air conditioning system utilizes the fluorine pump to drive the refrigerant to guide the heat in the machine room to the outside of the machine room, but the heat exchange effect is poor due to insufficient heat exchange temperature difference, and finally the ambient temperature in the data center is higher than the expected set value. Therefore, the optimal refrigeration mode in the time period is still the refrigeration of the compressor, and the control method avoids the situation that the refrigeration mode is frequently switched due to the fact that the data is wrongly read when the outdoor dry bulb temperature fluctuates around the critical temperature.

According to the air conditioner operation mode switching method in the embodiment, the daily temperature rise time period and the daily temperature reduction time period in different seasons are divided by analyzing the weather conditions of the installation geographical position in the past year and the daily time-by-time outdoor dry bulb temperature; indirectly judging the temperature rising and falling trend of the outdoor dry bulb by combining the rising and falling trend of the unit operation parameters; and cooperatively judging whether the operation mode is switched or not by combining the ascending and descending trends of each parameter in two fixed time periods before and after a certain time point.

The flow is judged in a three-time progressive mode, so that misoperation of the unit caused by sudden change or instability of the real-time monitored air temperature is reduced, whether the control of the operation mode of the unit is appropriate or not can be judged in advance, the logic defect of the control of the fluorine pump multi-mode refrigeration air-conditioning system in the prior art is overcome, and the operation stability of the air-conditioning unit is improved.

It should be understood that, although the steps in the flowcharts related to the embodiments as described above are sequentially displayed as indicated by arrows, the steps are not necessarily performed sequentially as indicated by the arrows. The steps are not limited to being performed in the exact order illustrated and, unless explicitly stated herein, may be performed in other orders. Moreover, at least a part of the steps in the flowcharts related to the embodiments described above may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the execution order of the steps or stages is not necessarily sequential, but may be rotated or alternated with other steps or at least a part of the steps or stages in other steps.

Based on the same inventive concept, the embodiment of the present application further provides an air conditioner operation mode switching device for implementing the above-mentioned air conditioner operation mode switching method. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the method, so the specific limitations in one or more embodiments of the air conditioner operation mode switching device provided below can be referred to the limitations on the air conditioner operation mode switching method in the foregoing, and details are not described here.

In one embodiment, as shown in fig. 11, there is provided an air conditioner operation mode switching apparatus 1100, including: a temperature comparison module 1101, a target operation mode determination module 1102, a variation trend determination module 1103 and a control module 1104, wherein:

the temperature comparison module 1101 is configured to obtain an outdoor dry bulb temperature of the air conditioning unit, and compare the outdoor dry bulb temperature with a preset critical temperature threshold to obtain a comparison result.

And a target operation mode determining module 1102, configured to obtain a target operation mode matched with the switching condition when the comparison result meets the switching condition.

And the variation trend determining module 1103 is used for determining the predicted temperature variation trend of the environment where the air conditioning unit is located.

And the control module 1104 is used for controlling the air conditioning unit to operate in the target operation mode if the predicted temperature variation trend is the same as the target temperature variation trend of the target operation mode.

According to the air conditioner operation mode switching device, the outdoor dry bulb temperature of the air conditioning unit acquired in real time is compared with the preset critical temperature threshold, when the comparison result meets the switching condition, the operation mode of the air conditioning unit is not directly switched, but a target operation mode matched with the switching condition is acquired, the predicted temperature change trend of the environment where the air conditioning unit is located is determined, the temperature change situation of the environment where the air conditioning unit is located can be predicted by predicting the temperature change trend, the predicted temperature change trend is compared with the target temperature change trend of the target operation mode, if the predicted temperature change trend is the same as the target temperature change trend of the target operation mode, the environment where the air conditioning unit is located can be considered to be free of temperature fluctuation, the air conditioning unit is controlled to operate in the target operation mode, the situation that the air conditioning unit frequently switches the operation mode due to outdoor environment temperature fluctuation is effectively avoided, and the operation stability of the air conditioning unit is improved.

In one embodiment, the trend of change determination module is further configured to: acquiring a temperature change curve corresponding to the current time parameter; the method comprises the following steps of obtaining temperature change curves corresponding to different time parameters in advance according to historical outdoor dry bulb temperatures of different time parameters of the environment where the air conditioning unit is located; and determining the predicted temperature change trend of the air conditioning unit according to the current time point and the temperature change curve.

In one embodiment, the air conditioner operation mode switching device further includes: and the correction module is used for correcting the predicted temperature change trend according to the actually measured temperature change trend of a first time period before the current time point and the actually measured temperature change trend of a second time period after the current time point.

In one embodiment, the correction module is further to: acquiring operation parameters and outdoor dry bulb temperature data of a first time period before a current time point;

determining the actually measured temperature change trend of the first time period according to the operating parameters of the first time period and the outdoor dry bulb temperature data; acquiring operation parameters and outdoor dry bulb temperature data of a second time period after the current time point; determining the actually measured temperature change trend of the second time period according to the operation parameters of the second time period and the outdoor dry bulb temperature data; and if the actually measured temperature change trend of the first time period is different from the actually measured temperature change trend of the second time period, correcting the predicted temperature change trend.

In one embodiment, the correction module is further configured to: and if the actually measured temperature change trend of the first time period is different from the actually measured temperature change trend of the second time period, correcting the rising trend or the falling trend into a fluctuation change trend.

In one embodiment, the control module is further configured to: and if the predicted temperature change trend is different from the target temperature change trend of the target operation mode, maintaining the air conditioning unit to operate in the target operation mode.

In one embodiment, the target operating mode determination module is further configured to: if the current operation mode of the air conditioning unit is the first operation mode and the outdoor dry bulb temperature is larger than the lower limit value of the preset critical temperature, the comparison result is determined to meet the switching condition, the target operation mode matched with the switching condition is the second operation mode, and the target temperature change trend of the second operation mode is the rising trend.

In one embodiment, the target operating mode determination module is further configured to: if the current operation mode of the air conditioning unit is the second operation mode and the outdoor dry bulb temperature is smaller than the lower limit value of the preset critical temperature, determining that the comparison result meets the switching condition, wherein the target operation mode matched with the switching condition is the first operation mode, and the target temperature change trend of the first operation mode is the descending trend.

In one embodiment, the target operating mode determination module is further configured to: and if the current operation mode of the air conditioning unit is the second operation mode and the outdoor dry bulb temperature is greater than the upper limit value of the preset critical temperature, determining that the comparison result meets the switching condition, wherein the target operation mode matched with the switching condition is the third operation mode, and the target temperature change trend of the first operation mode is an ascending trend.

In one embodiment, the target operating mode determination module is further configured to: and if the current operation mode of the air conditioning unit is the third operation mode and the outdoor dry bulb temperature is less than the upper limit value of the preset critical temperature, determining that the comparison result meets the switching condition, wherein the target operation mode matched with the switching condition is the second operation mode, and the target temperature change trend of the second operation mode is the descending trend.

Each module in the air conditioner operation mode switching device may be wholly or partially implemented by software, hardware, or a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.

In one embodiment, a computer device is provided, which may be a server, and the internal structure thereof may be as shown in fig. 12. The computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operating system and the computer program to run on the non-volatile storage medium. The database of the computer equipment is used for storing data such as outdoor dry bulb temperature, preset critical temperature threshold values, target operation modes and the like. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement an air conditioner operation mode switching method.

Those skilled in the art will appreciate that the architecture shown in fig. 12 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.

In one embodiment, a computer device is provided, which includes a memory and a processor, wherein the memory stores a computer program, and the processor implements the specific implementation steps of the air conditioner operation mode switching method when executing the computer program.

In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and the computer program, when executed by a processor, implements the specific implementation steps of the air conditioner operation mode switching method.

In one embodiment, a computer program product is provided, which includes a computer program, and when being executed by a processor, the computer program implements the specific implementation steps of the air conditioner operation mode switching method.

It should be noted that, the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, presented data, etc.) referred to in the present application are information and data authorized by the user or sufficiently authorized by each party.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above may be implemented by hardware instructions of a computer program, which may be stored in a non-volatile computer-readable storage medium, and when executed, may include the processes of the embodiments of the methods described above. Any reference to memory, databases, or other media used in the embodiments provided herein can include at least one of non-volatile and volatile memory. The nonvolatile Memory may include a Read-Only Memory (ROM), a magnetic tape, a floppy disk, a flash Memory, an optical Memory, a high-density embedded nonvolatile Memory, a resistive Random Access Memory (ReRAM), a Magnetic Random Access Memory (MRAM), a Ferroelectric Random Access Memory (FRAM), a Phase Change Memory (PCM), a graphene Memory, and the like. Volatile Memory can include Random Access Memory (RAM), external cache Memory, and the like. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others. The databases involved in the embodiments provided herein may include at least one of relational and non-relational databases. The non-relational database may include, but is not limited to, a block chain based distributed database, and the like. The processors referred to in the embodiments provided herein may be general purpose processors, central processing units, graphics processors, digital signal processors, programmable logic devices, quantum computing based data processing logic devices, etc., without limitation.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. An air conditioner operation mode switching method is characterized by comprising the following steps:

2. The method of claim 1, wherein determining the predicted trend of the temperature change of the environment in which the air conditioning unit is located comprises:

3. The method of claim 2, further comprising:

4. The method of claim 3, wherein said correcting the predicted temperature variation trend based on a measured temperature variation trend for a first time period prior to the current time point and a measured temperature variation trend for a second time period after the current time point comprises:

5. The method of claim 4, wherein the predicted temperature trend comprises an upward trend or a downward trend;

if the measured temperature variation trend of the first time period is different from the measured temperature variation trend of the second time period, the correcting the predicted temperature variation trend comprises:

6. The method of claim 1, further comprising:

7. The method according to any one of claims 1 or 6, wherein the obtaining the target operation mode matching the switching condition when the comparison result satisfies the switching condition comprises:

8. The method according to any one of claims 1 or 6, wherein the obtaining the target operation mode matching the switching condition when the comparison result satisfies the switching condition comprises:

9. The method according to any one of claims 1 or 6, wherein the obtaining the target operation mode matching the switching condition when the comparison result satisfies the switching condition comprises:

10. The method according to any one of claims 1 or 6, wherein the obtaining the target operation mode matching the switching condition when the comparison result satisfies the switching condition comprises:

if the current operation mode of the air conditioning unit is a third operation mode and the outdoor dry bulb temperature is smaller than the upper limit value of the preset critical temperature, determining that the comparison result meets the switching condition, wherein the target operation mode matched with the switching condition is a second operation mode, and the target temperature change trend of the second operation mode is a descending trend.

11. An air conditioner operation mode switching apparatus, comprising:

12. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor realizes the steps of the method of any one of claims 1 to 10 when executing the computer program.

13. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 10.

14. A computer program product comprising a computer program, characterized in that the computer program realizes the steps of the method of any one of claims 1 to 10 when executed by a processor.