CN108088031B - Defrosting control method for multi-split air conditioner, multi-split air conditioner and storage medium - Google Patents
Defrosting control method for multi-split air conditioner, multi-split air conditioner and storage medium Download PDFInfo
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- CN108088031B CN108088031B CN201711254593.4A CN201711254593A CN108088031B CN 108088031 B CN108088031 B CN 108088031B CN 201711254593 A CN201711254593 A CN 201711254593A CN 108088031 B CN108088031 B CN 108088031B
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Abstract
The invention discloses a defrosting control method of a multi-split air conditioner, which comprises the following steps: when a defrosting signal is received, controlling an electronic expansion valve of a shut-down indoor unit to be opened to a preset opening degree; acquiring operating parameters of an air conditioner; judging whether the operation parameters meet preset conditions or not; and when the operation parameters meet the preset conditions, controlling the air conditioner to carry out defrosting operation. The invention also discloses a multi-split air conditioner and a computer readable storage medium. The invention improves the temperature of the heat exchange tube of the shutdown indoor unit before defrosting of the multi-split air conditioner so as to evaporate water drops on the heat exchange tube of the shutdown indoor unit, reduce the amount of frost on the heat exchange tube of the shutdown indoor unit and solve the noise problem of the shutdown indoor unit.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a defrosting control method of a multi-split air conditioner, the multi-split air conditioner and a computer readable storage medium.
Background
When the multi-split air conditioner is defrosted, an electronic expansion valve of the shutdown indoor unit is opened, and a large amount of low-temperature refrigerants cause frosting on a heat exchanger of the shutdown indoor unit. After defrosting is finished, the frost on the heat exchanger of the shutdown internal machine is converted into water drops under the action of a high-temperature refrigerant, but the water drops are difficult to evaporate because a fan of the shutdown internal machine is not started. Therefore, after defrosting for a plurality of times, the heat exchanger of the internal shutdown machine has more water drops, defrosting is carried out again in the state, the water drops are solidified into frost, the frost and the heat exchanger act together in a cooling and shrinking mode to generate larger noise, and after defrosting is finished, the frost and the heat exchanger act together in a heating and expanding mode to generate larger noise.
Disclosure of Invention
The invention mainly aims to provide a defrosting control method of a multi-split air conditioner, the multi-split air conditioner and a computer readable storage medium, and aims to improve the temperature of a heat exchange tube of a shutdown indoor unit before the multi-split air conditioner performs defrosting so as to evaporate water drops on the heat exchange tube of the shutdown indoor unit, reduce the amount of frost on the heat exchange tube of the shutdown indoor unit and solve the noise problem of the shutdown indoor unit.
In order to achieve the above object, the present invention provides a defrosting control method of a multi-split air conditioner, which comprises the following steps:
when a defrosting signal is received, controlling an electronic expansion valve of a shut-down indoor unit to be opened to a preset opening degree;
acquiring operating parameters of an air conditioner;
judging whether the operation parameters meet preset conditions or not;
and when the operation parameters meet the preset conditions, controlling the air conditioner to carry out defrosting operation.
Preferably, before the electronic expansion valve of the indoor unit controlled to stop is opened to a preset opening degree, the method further includes:
judging whether the air conditioner has the indoor unit which is shut down;
when the shutdown indoor unit exists, executing the step of opening an electronic expansion valve of the shutdown indoor unit to a preset opening degree;
and when the indoor unit is not stopped, controlling the air conditioner to carry out defrosting operation.
Preferably, the step of opening the electronic expansion valve of the shutdown-controlled indoor unit to a preset opening degree and the step of acquiring the operating parameters of the air conditioner includes:
and adjusting the frequency of a compressor of the air conditioner to a preset frequency.
Preferably, the step of judging whether the operating parameter meets a preset condition includes:
and judging whether the temperature of the indoor heat exchange tube of the indoor unit is higher than the preset heat exchange tube temperature or not, wherein when the indoor heat exchange tube of the indoor unit is higher than the preset heat exchange tube temperature, judging that the operation parameters meet the preset conditions.
Preferably, the step of judging whether the operating parameter meets a preset condition includes:
and judging whether the exhaust temperature of the compressor is greater than a preset exhaust temperature or not, wherein when the exhaust temperature of the compressor is greater than the preset exhaust temperature, the operation parameter is judged to meet the preset condition.
Preferably, the step of judging whether the operating parameter meets a preset condition includes:
and judging whether the high-side pressure of the compressor is greater than a preset pressure, wherein when the high-side pressure of the compressor is greater than the preset pressure, the operation parameter is judged to meet the preset condition.
Preferably, the step of judging whether the operating parameter meets a preset condition includes:
and judging whether the running time of the compressor running at the preset frequency is greater than preset time or not, wherein when the running time of the compressor running at the preset frequency is greater than the preset time, the running parameters are judged to meet the preset conditions.
In order to achieve the above object, the present invention also provides a multi-split air conditioner, including:
the defrosting control program of the multi-split air conditioner is executed by the processor to realize the steps of the defrosting control method of the multi-split air conditioner.
In order to achieve the above object, the present invention further provides a computer readable storage medium, on which a defrosting control program of a multi-split air conditioner is stored, wherein the defrosting control program of the multi-split air conditioner, when executed by a processor, implements the steps of the defrosting control method of the multi-split air conditioner.
According to the defrosting control method of the multi-split air conditioner, the multi-split air conditioner and the computer readable storage medium, when a defrosting signal is received, the electronic expansion valve of the stopped indoor unit is controlled to be opened to the preset opening degree, then the operation parameters of the air conditioner are obtained, whether the operation parameters meet the preset conditions or not is judged, and when the operation parameters meet the preset conditions, the air conditioner is controlled to carry out defrosting operation. The invention improves the temperature of the heat exchange tube of the shutdown indoor unit before defrosting of the multi-split air conditioner so as to evaporate water drops on the heat exchange tube of the shutdown indoor unit, reduce the amount of frost on the heat exchange tube of the shutdown indoor unit and solve the noise problem of the shutdown indoor unit.
Drawings
Fig. 1 is a schematic diagram of a hardware operating environment of a terminal according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a defrosting control method for a multi-split air conditioner according to a first embodiment of the present invention;
FIG. 3 is a schematic flow chart illustrating a defrosting control method for a multi-split air conditioner according to a second embodiment of the present invention;
FIG. 4 is a schematic flow chart illustrating a defrosting control method for a multi-split air conditioner according to a third embodiment of the present invention;
FIG. 5 is a schematic view of a detailed process for determining whether the operating parameters satisfy the predetermined conditions according to the present invention;
FIG. 6 is a schematic view of a detailed process for determining whether the operating parameters satisfy the predetermined conditions according to the present invention;
FIG. 7 is a schematic view of a detailed process for determining whether the operating parameters satisfy the predetermined conditions according to the present invention;
fig. 8 is a schematic view of a detailed process for determining whether the operating parameters satisfy the preset conditions according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a defrosting control method of a multi-split air conditioner, which is used for increasing the temperature of a heat exchange tube of a shutdown indoor unit before the multi-split air conditioner carries out defrosting so as to evaporate water drops on the heat exchange tube of the shutdown indoor unit, reduce the amount of frost on the heat exchange tube of the shutdown indoor unit and solve the problem of noise of the shutdown indoor unit.
As shown in fig. 1, fig. 1 is a schematic diagram of a hardware operating environment of a terminal according to an embodiment of the present invention;
the terminal of the embodiment of the invention is an air conditioner.
As shown in fig. 1, the terminal may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (such as a non-volatile memory, e.g., disk storage) and the memory 1005 may optionally also be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration of the terminal shown in fig. 1 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a kind of computer storage medium, may include therein an operating system, a network communication module, a user interface module, and a defrosting control program of a multi-split air conditioner.
In the terminal shown in fig. 1, the network interface 1004 is mainly used for connecting to a backend server and performing data communication with the backend server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be configured to call a control program of an indoor fan of the air conditioner stored in the memory 1005, and perform the following operations:
when a defrosting signal is received, controlling an electronic expansion valve of a shut-down indoor unit to be opened to a preset opening degree;
acquiring operating parameters of an air conditioner;
judging whether the operation parameters meet preset conditions or not;
and when the operation parameters meet the preset conditions, controlling the air conditioner to carry out defrosting operation.
Further, the processor 1001 may call a defrosting control program of the multi-split air conditioner stored in the memory 1005, and also perform the following operations:
judging whether the air conditioner has the indoor unit which is shut down;
when the shutdown indoor unit exists, executing the step of opening an electronic expansion valve of the shutdown indoor unit to a preset opening degree;
and when the indoor unit is not stopped, controlling the air conditioner to carry out defrosting operation.
Further, the processor 1001 may call a defrosting control program of the multi-split air conditioner stored in the memory 1005, and also perform the following operations:
and adjusting the frequency of a compressor of the air conditioner to a preset frequency.
Further, the processor 1001 may call a defrosting control program of the multi-split air conditioner stored in the memory 1005, and also perform the following operations:
and judging whether the temperature of the indoor heat exchange tube of the indoor unit is higher than the preset heat exchange tube temperature or not, wherein when the indoor heat exchange tube of the indoor unit is higher than the preset heat exchange tube temperature, judging that the operation parameters meet the preset conditions.
Further, the processor 1001 may call a defrosting control program of the multi-split air conditioner stored in the memory 1005, and also perform the following operations:
and judging whether the exhaust temperature of the compressor is greater than a preset exhaust temperature or not, wherein when the exhaust temperature of the compressor is greater than the preset exhaust temperature, the operation parameter is judged to meet the preset condition.
Further, the processor 1001 may call a defrosting control program of the multi-split air conditioner stored in the memory 1005, and also perform the following operations:
and judging whether the high-side pressure of the compressor is greater than a preset pressure, wherein when the high-side pressure of the compressor is greater than the preset pressure, the operation parameter is judged to meet the preset condition.
Further, the processor 1001 may call a defrosting control program of the multi-split air conditioner stored in the memory 1005, and also perform the following operations:
and judging whether the running time of the compressor running at the preset frequency is greater than preset time or not, wherein when the running time of the compressor running at the preset frequency is greater than the preset time, the running parameters are judged to meet the preset conditions.
Referring to fig. 2, in a first embodiment, a defrosting control method of a multi-split air conditioner includes:
step S10, when a defrosting signal is received, controlling the opening of an electronic expansion valve of the shutdown indoor unit to a preset opening;
in this embodiment, when the defrosting signal is received, it is first determined whether the air conditioner has an indoor unit that is shut down, and when the indoor unit that is shut down is present, the electronic expansion valve of the indoor unit that is shut down is controlled to open to a preset opening. The indoor unit is in heating state, the temperature of the indoor heat exchange tube is high, and the temperature of the stopped indoor unit is close to the room temperature, so that when the air conditioner defrosts, a large amount of low-temperature refrigerant causes the frosting on the indoor heat exchange tube of the stopped indoor unit, the electronic expansion valve of the stopped indoor unit is opened to the preset opening degree, the high-temperature gaseous refrigerant can flow through the stopped indoor unit, and the indoor heat exchange tube of the indoor unit is heated. The preset opening degree may be a maximum opening degree.
Step S20, obtaining the operation parameters of the air conditioner;
in this embodiment, the operation parameter of the air conditioner may be an indoor heat exchange pipe temperature of the indoor unit that is shut down, an exhaust temperature of the compressor, a high-side pressure of the compressor, and an operation time of the compressor that operates at the preset frequency. The preset frequency is used to ensure the defrosting rate, and may be set according to practical applications, such as 60Hz, and the present invention is not limited specifically.
Step S30, judging whether the operation parameters meet preset conditions;
and step S40, controlling the air conditioner to carry out defrosting operation when the operation parameters meet the preset conditions.
And when the operation parameters are acquired, judging whether the operation parameters meet preset conditions. Specifically, whether the temperature of an indoor heat exchange tube of the shutdown indoor unit is greater than the temperature of a preset heat exchange tube or not is judged, whether the exhaust temperature of the compressor is greater than the preset exhaust temperature or not is judged, whether the high-pressure side pressure of the compressor is greater than the preset pressure or not is judged, and whether the running time of the compressor running at the preset frequency is greater than the preset time or not is judged, wherein when one of the four conditions that the temperature of the indoor heat exchange tube of the shutdown indoor unit is greater than the preset heat exchange tube temperature, the exhaust temperature of the compressor is greater than the preset exhaust temperature, the high-pressure side pressure of the compressor is greater than the preset pressure, and the running time of the compressor running at the preset frequency is greater than the preset time is met, the running parameters are judged to meet the. It should be noted that the four preset parameters of the preset heat exchange tube temperature, the preset exhaust temperature, the preset pressure and the preset time may be set according to actual conditions, and the present invention is not particularly limited.
In the first embodiment, when a defrosting signal is received, an electronic expansion valve of a stopped indoor unit is controlled to be opened to a preset opening degree, then an operation parameter of an air conditioner is obtained, whether the operation parameter meets a preset condition or not is judged, and when the operation parameter meets the preset condition, the air conditioner is controlled to carry out defrosting operation. Therefore, the temperature of the heat exchange tube of the shutdown inner machine is increased before defrosting of the multi-split air conditioner, water drops on the heat exchange tube of the shutdown inner machine are evaporated, the frost quantity on the heat exchange tube of the shutdown inner machine is reduced, and the problem of noise of the shutdown inner machine is solved.
In a second embodiment, as shown in fig. 3, in addition to the embodiment shown in fig. 2, before the opening of the electronic expansion valve of the indoor unit for controlling a stop is opened to a predetermined opening degree, the method further includes:
step S50, judging whether the air conditioner has the stopped indoor unit;
step S60, when the shutdown indoor unit exists, executing the step of opening an electronic expansion valve of the shutdown-controlled indoor unit to a preset opening degree;
and step S70, controlling the air conditioner to perform defrosting operation when the indoor unit is not stopped.
In this embodiment, when the defrosting signal is received, it is first determined whether the air conditioner has an indoor unit that is shut down, and when the indoor unit that is shut down is present, the electronic expansion valve of the indoor unit that is shut down is controlled to open to a preset opening. The indoor unit is in heating state, the temperature of the indoor heat exchange tube is high, and the temperature of the stopped indoor unit is close to the room temperature, so that when the air conditioner defrosts, a large amount of low-temperature refrigerant causes the frosting on the indoor heat exchange tube of the stopped indoor unit, the electronic expansion valve of the stopped indoor unit is opened to the preset opening degree, the high-temperature gaseous refrigerant can flow through the stopped indoor unit, and the indoor heat exchange tube of the indoor unit is heated. The preset opening degree may be a maximum opening degree.
In this embodiment, when there is no stopped indoor unit, the air conditioner is directly controlled to perform defrosting operation. The reason is that the temperature of the indoor heat exchange tube is higher when the indoor unit is in a heating state.
In the second embodiment, whether the air conditioner has the stopped indoor unit is judged firstly, when the stopped indoor unit exists, the electronic expansion valve of the stopped indoor unit is controlled to be opened to the preset opening degree when the stopped indoor unit exists, and when the stopped indoor unit does not exist, the air conditioner is controlled to directly perform defrosting operation. Therefore, the temperature of the heat exchange tube of the shutdown internal machine is increased before defrosting of the multi-split air conditioner, and the problem of noise of the shutdown internal machine is solved.
In a third embodiment, as shown in fig. 4, based on the embodiment shown in any one of fig. 2 to 3, the step of opening the electronic expansion valve of the shutdown-controlled indoor unit to a preset opening degree and acquiring the operation parameters of the air conditioner includes:
and step S80, adjusting the frequency of the compressor of the air conditioner to a preset frequency.
In a third embodiment, after controlling the electronic expansion valve of the shutdown indoor unit to be opened to a preset opening, the frequency of the compressor of the air conditioner is adjusted to a preset frequency, where the preset frequency is used to ensure the rising rate of the temperature of the indoor heat exchange tube of the shutdown indoor unit, so as to ensure the defrosting efficiency, and the frequency can be set according to practical applications, such as 60Hz, which is not specifically limited in the present invention. After the frequency of the compressor is adjusted to the preset frequency, the temperature of an indoor heat exchange tube of the shutdown indoor unit of the air conditioner, the exhaust temperature of the compressor, the high-pressure side pressure of the compressor and the running time of the compressor running at the preset frequency are obtained.
In a third embodiment, after the electronic expansion valve of the shutdown indoor unit is controlled to be opened to a preset opening, the frequency of the compressor of the air conditioner is adjusted to a preset frequency, and then the operating parameters of the air conditioner are obtained. Therefore, the rising speed of the temperature of the indoor heat exchange tube of the shutdown inner machine is ensured, the defrosting efficiency is ensured, and the frosting problem of the indoor heat exchange tube of the shutdown inner machine is avoided.
In a fourth embodiment, as shown in fig. 5, on the basis of the embodiments shown in fig. 2 to 4, the step of determining whether the operating parameter meets a preset condition includes:
and S31, judging whether the temperature of the indoor heat exchange tube of the indoor unit which is shut down is higher than the temperature of a preset heat exchange tube or not, wherein when the temperature of the indoor heat exchange tube of the indoor unit which is shut down is higher than the temperature of the preset heat exchange tube, the operation parameter is judged to meet the preset condition.
In this embodiment, the indoor heat exchange tube temperature of the stopped indoor unit is detected. It should be noted that there may be a plurality of shutdown indoor units, and when the temperature of the indoor heat exchange tube of at least one shutdown indoor unit is greater than the preset heat exchange tube temperature, it is determined that the operating parameter meets the preset condition. The temperature of the heat exchange tubes of the indoor units of the multi-split air conditioner is relatively close, and when the temperature of the indoor heat exchange tube of one shutdown indoor unit is higher than the preset temperature of the heat exchange tube, the temperature of the indoor heat exchange tubes of other shutdown indoor units cannot be lower than the preset temperature of the heat exchange tube too much. If the defrosting operation is performed when the temperature of the indoor heat exchange tubes of all the shutdown indoor units is higher than the preset temperature of the heat exchange tubes, the temperature of the indoor heat exchange tubes of the indoor units is possibly higher, which is not favorable for the stability and the reliability of the air conditioning system.
It should be noted that the preset temperature of the heat exchange tube is set according to actual conditions, and the invention is not limited in particular.
In a fourth embodiment, it is determined whether the temperature of the indoor heat exchange tube of the shutdown indoor unit is greater than the preset heat exchange tube temperature, and when the temperature of the indoor heat exchange tube of the shutdown indoor unit is greater than the preset heat exchange tube temperature, it is determined that the operating parameter meets the preset condition. Therefore, the temperature of the heat exchange tube of the shutdown inner machine is improved before the air conditioner is controlled to defrost, the frosting problem of the indoor heat exchange tube of the shutdown inner machine is avoided, and the stability and the reliability of the system are guaranteed.
In a fifth embodiment, as shown in fig. 6, on the basis of the embodiments shown in fig. 2 to 5, the step of determining whether the operating parameter meets a preset condition includes:
and step S32, judging whether the exhaust temperature of the compressor is greater than a preset exhaust temperature or not, wherein when the exhaust temperature of the compressor is greater than the preset exhaust temperature, the operation parameters are judged to meet the preset conditions.
In this embodiment, the discharge temperature of the compressor is detected, and when the discharge temperature of the compressor is greater than the preset discharge temperature, it is determined that the operation parameter satisfies the preset condition. The reason is that when the exhaust temperature of the compressor is higher than the preset exhaust temperature, even if the temperature of the indoor heat exchange tube of the shutdown indoor unit is not higher than the preset heat exchange tube temperature, the temperature of the indoor heat exchange tube of the shutdown indoor unit is not lower than the preset heat exchange tube temperature too much. When the exhaust temperature is higher than the preset exhaust temperature, the air conditioner is prevented from being damaged due to overhigh exhaust temperature, the capacity and the reliability of an air conditioning system are guaranteed, and the air conditioner is controlled to perform defrosting operation.
It should be noted that the preset exhaust temperature is set according to actual conditions, and the present invention is not limited in particular.
In a fifth embodiment, it is determined whether the discharge temperature of the compressor is greater than a preset discharge temperature, wherein when the discharge temperature of the compressor is greater than the preset discharge temperature, it is determined that the operating parameter satisfies the preset condition. Therefore, the temperature of the heat exchange tube of the shutdown inner machine is improved before the air conditioner is controlled to defrost, the frosting problem of the indoor heat exchange tube of the shutdown inner machine is avoided, and the capacity and the reliability of the system are guaranteed.
In a sixth embodiment, as shown in fig. 7, on the basis of the embodiments shown in fig. 2 to 6, the step of determining whether the operating parameter meets a preset condition includes:
and step S33, judging whether the high-side pressure of the compressor is greater than a preset pressure, wherein when the high-side pressure of the compressor is greater than the preset pressure, the operation parameter is judged to meet the preset condition.
In this embodiment, the high-side pressure of the compressor is detected, and when the high-side pressure of the compressor is greater than a preset pressure, it is determined that the operating parameter satisfies a preset condition. The reason is that when the high-side pressure of the compressor is higher than the preset pressure, even if the temperature of the indoor heat exchange tube of the shutdown inner machine is not higher than the preset temperature of the heat exchange tube, the temperature of the indoor heat exchange tube of the shutdown inner machine is not lower than the preset temperature of the heat exchange tube too much. When the high-pressure side pressure of the compressor is larger than the preset pressure, in order to ensure the capacity and the reliability of an air conditioning system and avoid the damage of the air conditioner due to overhigh pressure, the air conditioner is controlled to carry out defrosting operation at the moment.
It should be noted that the preset pressure is set according to actual conditions, and the present invention is not limited specifically.
In the sixth embodiment, it is determined whether the high-side pressure of the compressor is greater than a preset pressure, and when the high-side pressure of the compressor is greater than the preset pressure, it is determined that the operation parameter satisfies the preset condition. Therefore, the temperature of the heat exchange tube of the shutdown inner machine is improved before the air conditioner is controlled to defrost, the frosting problem of the indoor heat exchange tube of the shutdown inner machine is avoided, and the capacity and the reliability of the system are guaranteed.
In a seventh embodiment, as shown in fig. 8, on the basis of the embodiments shown in fig. 2 to 7, the step of determining whether the operating parameter meets a preset condition includes:
and step S34, judging whether the running time of the compressor running at the preset frequency is greater than the preset time, wherein when the running time of the compressor running at the preset frequency is greater than the preset time, the running parameters are judged to meet the preset conditions.
In this embodiment, the operation time of the compressor operating at the preset frequency is detected, and when the operation time of the compressor operating at the preset frequency is greater than the preset time, it is determined that the operation parameter meets the preset condition. The reason is that when the running time of the compressor running at the preset frequency is longer than the preset time, even if the temperature of the indoor heat exchange tube of the shutdown indoor unit is not higher than the preset temperature of the heat exchange tube, the temperature of the indoor heat exchange tube of the shutdown indoor unit is not lower than the preset temperature of the heat exchange tube too much. When the running time of the compressor running at the preset frequency is longer than the preset time, in order to avoid the problem that the heating capacity is reduced due to the long-time running of the air conditioner, so that the efficiency of an air conditioning system is influenced, the air conditioner is controlled to carry out defrosting operation.
The preset time is set according to actual conditions, and the invention is not particularly limited.
In a seventh embodiment, it is determined whether the operation time of the compressor operating at the preset frequency is greater than a preset time, and when the operation time of the compressor operating at the preset frequency is greater than the preset time, it is determined that the operation parameter satisfies the preset condition. Therefore, the temperature of the heat exchange tube of the shutdown inner machine is improved before the air conditioner is controlled to defrost, the frosting problem of the indoor heat exchange tube of the shutdown inner machine is avoided, and the efficiency of the system is ensured.
The present invention also provides a multi-split air conditioner, which includes: a defrosting control program of a multi-split air conditioner, the defrosting control program of the multi-split air conditioner being configured to implement the following operations:
when a defrosting signal is received, controlling an electronic expansion valve of a shut-down indoor unit to be opened to a preset opening degree;
acquiring operating parameters of an air conditioner;
judging whether the operation parameters meet preset conditions or not;
and when the operation parameters meet the preset conditions, controlling the air conditioner to carry out defrosting operation.
Further, the defrosting control program of the multi-split air conditioner is configured to implement the following operations:
judging whether the air conditioner has the indoor unit which is shut down;
when the shutdown indoor unit exists, executing the step of opening an electronic expansion valve of the shutdown indoor unit to a preset opening degree;
and when the indoor unit is not stopped, controlling the air conditioner to carry out defrosting operation.
Further, the defrosting control program of the multi-split air conditioner is configured to implement the following operations:
and adjusting the frequency of a compressor of the air conditioner to a preset frequency.
Further, the defrosting control program of the multi-split air conditioner is configured to implement the following operations:
and judging whether the temperature of the indoor heat exchange tube of the indoor unit is higher than the preset heat exchange tube temperature or not, wherein when the indoor heat exchange tube of the indoor unit is higher than the preset heat exchange tube temperature, judging that the operation parameters meet the preset conditions.
Further, the defrosting control program of the multi-split air conditioner is configured to implement the following operations:
and judging whether the exhaust temperature of the compressor is greater than a preset exhaust temperature or not, wherein when the exhaust temperature of the compressor is greater than the preset exhaust temperature, the operation parameter is judged to meet the preset condition.
Further, the defrosting control program of the multi-split air conditioner is configured to implement the following operations:
and judging whether the high-side pressure of the compressor is greater than a preset pressure, wherein when the high-side pressure of the compressor is greater than the preset pressure, the operation parameter is judged to meet the preset condition.
Further, the defrosting control program of the multi-split air conditioner is configured to implement the following operations:
and judging whether the running time of the compressor running at the preset frequency is greater than preset time or not, wherein when the running time of the compressor running at the preset frequency is greater than the preset time, the running parameters are judged to meet the preset conditions.
The multi-split air conditioner provided by the invention controls the opening of an electronic expansion valve of a shut-down indoor unit to a preset opening degree when receiving a defrosting signal, then obtains the operation parameters of the air conditioner, judges whether the operation parameters meet preset conditions or not, and controls the air conditioner to carry out defrosting operation when the operation parameters meet the preset conditions. The invention improves the temperature of the heat exchange tube of the shutdown indoor unit before defrosting of the multi-split air conditioner so as to evaporate water drops on the heat exchange tube of the shutdown indoor unit, reduce the amount of frost on the heat exchange tube of the shutdown indoor unit and solve the noise problem of the shutdown indoor unit.
An embodiment of the present invention further provides a computer-readable storage medium, where a defrosting control program of a multi-split air conditioner is stored on the computer-readable storage medium, and the defrosting control program of the multi-split air conditioner is executed by a processor to implement the following operations:
when a defrosting signal is received, controlling an electronic expansion valve of a shut-down indoor unit to be opened to a preset opening degree;
acquiring operating parameters of an air conditioner;
judging whether the operation parameters meet preset conditions or not;
and when the operation parameters meet the preset conditions, controlling the air conditioner to carry out defrosting operation.
Further, when executed by the processor, the defrosting control program of the multi-split air conditioner further realizes the following operations:
judging whether the air conditioner has the indoor unit which is shut down;
when the shutdown indoor unit exists, executing the step of opening an electronic expansion valve of the shutdown indoor unit to a preset opening degree;
and when the indoor unit is not stopped, controlling the air conditioner to carry out defrosting operation.
Further, when executed by the processor, the defrosting control program of the multi-split air conditioner further realizes the following operations:
and adjusting the frequency of a compressor of the air conditioner to a preset frequency.
Further, when executed by the processor, the defrosting control program of the multi-split air conditioner further realizes the following operations:
and judging whether the temperature of the indoor heat exchange tube of the indoor unit is higher than the preset heat exchange tube temperature or not, wherein when the indoor heat exchange tube of the indoor unit is higher than the preset heat exchange tube temperature, judging that the operation parameters meet the preset conditions.
Further, when executed by the processor, the defrosting control program of the multi-split air conditioner further realizes the following operations:
and judging whether the exhaust temperature of the compressor is greater than a preset exhaust temperature or not, wherein when the exhaust temperature of the compressor is greater than the preset exhaust temperature, the operation parameter is judged to meet the preset condition.
Further, when executed by the processor, the defrosting control program of the multi-split air conditioner further realizes the following operations:
and judging whether the high-side pressure of the compressor is greater than a preset pressure, wherein when the high-side pressure of the compressor is greater than the preset pressure, the operation parameter is judged to meet the preset condition.
Further, when executed by the processor, the defrosting control program of the multi-split air conditioner further realizes the following operations:
and judging whether the running time of the compressor running at the preset frequency is greater than preset time or not, wherein when the running time of the compressor running at the preset frequency is greater than the preset time, the running parameters are judged to meet the preset conditions.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for enabling a terminal device (e.g., a television, a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (4)
1. A defrosting control method of a multi-split air conditioner is characterized by comprising the following steps:
when a defrosting signal is received, judging whether the air conditioner has a shutdown indoor unit;
when the shutdown indoor unit exists, controlling an electronic expansion valve of the shutdown indoor unit to be opened to a preset opening degree;
acquiring operating parameters of an air conditioner;
judging whether the operation parameters meet preset conditions or not; judging whether the temperature of an indoor heat exchange tube of the indoor unit which is shut down is higher than a preset heat exchange tube temperature, wherein when the temperature of the indoor heat exchange tube of the indoor unit which is shut down is higher than the preset heat exchange tube temperature, the operation parameter is judged to meet the preset condition; or judging whether the exhaust temperature of the compressor is greater than a preset exhaust temperature or not, wherein when the exhaust temperature of the compressor is greater than the preset exhaust temperature, the operation parameter is judged to meet the preset condition; or judging whether the high-side pressure of the compressor is greater than a preset pressure, wherein when the high-side pressure of the compressor is greater than the preset pressure, the operation parameter is judged to meet the preset condition; or judging whether the running time of the compressor running at the preset frequency is greater than the preset time or not, wherein when the running time of the compressor running at the preset frequency is greater than the preset time, the running parameters are judged to meet the preset conditions;
when the operation parameters meet the preset conditions, controlling the air conditioner to carry out defrosting operation;
and when the indoor unit is not stopped, controlling the air conditioner to carry out defrosting operation.
2. The defrosting control method of a multi-split air conditioner as claimed in claim 1, wherein between the step of controlling the electronic expansion valve of the stopped indoor unit to be opened to a preset opening degree and the step of acquiring the operation parameters of the air conditioner, comprising:
and adjusting the frequency of a compressor of the air conditioner to a preset frequency.
3. A multi-split air conditioner comprising a memory, a processor, and a defrosting control program of the multi-split air conditioner stored in the memory and executable on the processor, wherein the defrosting control program of the multi-split air conditioner, when executed by the processor, implements the steps of the defrosting control method of the multi-split air conditioner as set forth in any one of claims 1 to 2.
4. A computer-readable storage medium, wherein the computer-readable storage medium has stored thereon a defrosting control program of a multi-split air conditioner, which when executed by a processor, implements the steps of the defrosting control method of the multi-split air conditioner according to any one of claims 1 to 2.
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| CN110631199A (en) * | 2018-06-25 | 2019-12-31 | 青岛海尔空调器有限总公司 | Defrosting control method and device for air conditioner |
| CN108917094A (en) * | 2018-07-18 | 2018-11-30 | 奥克斯空调股份有限公司 | A kind of defrosting control method, device and air conditioner |
| CN110542175A (en) * | 2019-09-06 | 2019-12-06 | 珠海格力电器股份有限公司 | air conditioner defrosting method |
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