CN108195050B - Backup continuous operation control method for multi-split air conditioner and multi-split air conditioner - Google Patents
Backup continuous operation control method for multi-split air conditioner and multi-split air conditioner Download PDFInfo
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Abstract
The backup continuous operation control method of the multi-split air conditioner comprises the steps of determining a first actual measured value; the controller compares the first actual measurement value with a target pressure value corresponding to the working mode, and corrects the current compressor operating frequency according to the determined deviation under the condition that the deviation between the first actual measurement value and the target pressure value is determined; maintaining a correction factor for correcting the current compressor operating frequency in accordance with the determined deviation until the first actual measurement value equals the target pressure value; and meanwhile, comparing the first actual measurement value with the pressure limit value of the corresponding working mode, and under the condition that the first actual measurement value is determined to exceed the pressure limit value, actively generating or passively receiving a control signal by the controller and switching the control signal to a simulation system control strategy, wherein in the simulation system control strategy, deviation is determined and the current operating frequency of the compressor is corrected according to the temperature of a coil pipe of the indoor unit. Also disclosed is a multi-split air conditioner. The invention has the advantage of good stability.
Description
Technical Field
The invention relates to the technical field of air conditioning, in particular to a backup continuous operation control method for a multi-split air conditioner and the multi-split air conditioner adopting the backup continuous operation control method.
Background
The multi-split air conditioner is a large branch of a split air conditioner, has a plurality of indoor units, can be used for a plurality of rooms, and shares one outdoor unit. The number of indoor units can be selected from several to several tens. The indoor units and the outdoor units are communicated through a set of pipelines.
Unlike the conventional unit type air conditioner, in the one-drive-many air conditioner, if some parts in the outdoor unit are damaged, the whole system cannot be used, which is also an important factor limiting the spread of the one-drive-many air conditioner. In the prior art, a plurality of backup control schemes are arranged, so that the operation stability of the multi-split air conditioner is improved. The backup control scheme of the part mainly aims at the phenomenon of compressor damage. If only one outdoor unit is installed in a multi-split air conditioner, more than two compressors are needed to be connected in parallel, or two outdoor units are needed to be connected in parallel. If one compressor or one outdoor unit is damaged, other compressors or other outdoor units can normally operate to meet the use requirement of the whole system.
However, in the one-to-many air conditioner, a pressure sensor is also provided. Generally, if the pressure in the system fluctuates sharply, it is determined that the system is in an abnormal state, and the entire system is stopped for the purpose of protecting the compressor. But the drastic fluctuation of the system pressure is probably caused by the failure of the pressure sensor itself. In this case, the air conditioner is stopped, on one hand, the performance of the air conditioner is sacrificed, on the other hand, the position of the fault cannot be accurately positioned, and the problem of low control precision exists.
Disclosure of Invention
The backup continuous operation control method of the multi-split air conditioner is characterized in that the multi-split air conditioner comprises the following steps:
the outdoor unit comprises at least one compressor;
the outdoor units are communicated with the indoor units through refrigerant pipelines;
a first measuring device is arranged on a refrigerant pipeline connected with the compressor;
a memory having stored therein at least one target pressure value and at least one pressure limit value;
and a controller;
the method comprises the following steps:
the first measuring device determines a first actual measurement value representing a pressure in a refrigerant line connected to the compressor that is reached at a measuring instant under normal air conditioning operation;
the controller compares the first actual measurement value with the target pressure value of the corresponding working mode, and corrects the current compressor operating frequency according to the determined deviation under the condition that the first actual measurement value and the target pressure value are determined to have deviation;
maintaining a correction factor that corrects the current compressor operating frequency according to the determined deviation until the first actual measurement value equals a target pressure value;
when the controller compares a first actual measurement value with the target pressure value of the corresponding working mode, the first actual measurement value is compared with the pressure limit value of the corresponding working mode, and when the first actual measurement value is determined to exceed the pressure limit value, the controller actively generates or passively receives a control signal and switches the control signal to a simulation system control strategy, and in the simulation system control strategy, deviation is determined and the current operating frequency of the compressor is corrected according to the coil temperature of the indoor unit.
Further, the first measuring device comprises a high-pressure sensor arranged at a high-pressure end of the compressor, and a low-pressure sensor arranged at a low-pressure end of the compressor, and the target pressure values comprise a target high-pressure corresponding to the high-pressure sensor and a target low-pressure corresponding to the low-pressure sensor; determining a deviation and generating a correction factor according to a first actual measurement value determined by the low pressure sensor and the target low pressure in a cooling mode; in the heating mode, a deviation is determined from the first actual measurement value determined by the high-pressure sensor and the target high-pressure and a correction factor is generated.
Furthermore, in the cooling mode, the low-pressure sensor determines a first actual measurement value, the controller compares the first actual measurement value with the target low-pressure, when the first actual measurement value is determined to be higher than the target low-pressure, a first correction coefficient is generated according to the determined deviation, and the first correction coefficient is used for correcting the current compressor operation frequency; when the first actual measurement value is determined to be lower than the target low-pressure, generating a second correction coefficient according to the determined deviation, and correcting the current compressor operation frequency by using the second correction coefficient; wherein the first correction coefficient is a positive coefficient and the second correction coefficient is a negative coefficient;
or in the heating mode, the high-pressure sensor determines a first actual measurement value, the controller compares the first actual measurement value with the target high-pressure, when the first actual measurement value is determined to be higher than the target high-pressure, a first correction coefficient is generated according to the determined deviation, and the first correction coefficient is used for correcting the current compressor operation frequency; when the first actual measurement value is determined to be lower than the target high-pressure, generating a second correction coefficient according to the determined deviation, and correcting the current compressor operation frequency by using the second correction coefficient; wherein the first correction coefficient is a negative coefficient and the second correction coefficient is a positive coefficient.
As an optional mode, a second measurement device is arranged on the heat exchanger of the indoor unit, and at least one target temperature value is stored in the memory;
further comprising the steps of:
in the simulation system control strategy, the second measurement device determines a second actual measurement value, wherein the second actual measurement value represents the surface temperature of a heat exchanger in the indoor unit at the moment of measurement under the normal air-conditioning operation;
the controller compares the second actual measurement value with the target temperature value of the corresponding working mode, and corrects the current compressor operating frequency according to the determined deviation under the condition that the second actual measurement value and the target temperature value are determined to deviate;
maintaining a correction factor for correcting the current compressor operating frequency according to the determined deviation until the second actual measurement value equals the target temperature value.
Furthermore, the memory stores a first target temperature value and a second target temperature value;
in a cooling mode, the second measuring device determines a second actual measurement value, the controller compares the second actual measurement value with the first target temperature value, when the second actual measurement value is determined to be lower than the first target temperature value, a first correction coefficient is generated according to the determined deviation, and the first correction coefficient is used for correcting the current compressor operation frequency; when the second actual measurement value is determined to be higher than the first target temperature value, generating a second correction coefficient according to the determined deviation, and correcting the current compressor operation frequency by using the second correction coefficient; wherein the first correction coefficient is a negative coefficient and the second correction coefficient is a positive coefficient;
or, in the heating mode, the second measurement device determines a second actual measurement value, the controller compares the second actual measurement value with the second target temperature value, when the second actual measurement value is determined to be lower than the second target temperature value, a first correction coefficient is generated according to the determined deviation, and the current compressor operating frequency is corrected by using the first correction coefficient; when the second actual measurement value is determined to be higher than the second target temperature value, generating a second correction coefficient according to the determined deviation, and correcting the current compressor operation frequency by using the second correction coefficient; wherein the first correction coefficient is a positive coefficient and the second correction coefficient is a negative coefficient.
As another optional mode, a second measurement device is arranged on the heat exchanger of the indoor unit, and at least one target temperature average value is stored in the memory;
further comprising the steps of:
in the simulation system control strategy, the second measurement device determines a second actual measurement value, wherein the second actual measurement value represents an average value of surface temperatures of heat exchangers in a plurality of indoor units at the moment of measurement under normal air-conditioning operation;
the controller compares the second actual measurement value with the target temperature average value of the corresponding working mode, and corrects the current compressor running frequency according to the determined deviation under the condition that the deviation is determined between the second actual measurement value and the target temperature average value;
maintaining a correction factor that corrects the current compressor operating frequency according to the determined deviation until the second actual measurement value equals the target temperature average value.
Further, the memory stores a first target temperature average value and a second target temperature average value;
in a cooling mode, the second measuring device determines a second actual measurement value, the controller compares the second actual measurement value with the first target temperature average value, when the second actual measurement value is determined to be lower than the first target temperature average value, a first correction coefficient is generated according to the determined deviation, and the first correction coefficient is used for correcting the current compressor running frequency; when the second actual measurement value is determined to be higher than the first target temperature average value, generating a second correction coefficient according to the determined deviation, and correcting the current compressor running frequency by using the second correction coefficient; wherein the first correction coefficient is a negative coefficient and the second correction coefficient is a positive coefficient;
or, in the heating mode, the second measurement device determines a second actual measurement value, the controller compares the second actual measurement value with the second target temperature average value, when the second actual measurement value is determined to be lower than the second target temperature average value, a first correction coefficient is generated according to the determined deviation, and the current compressor operating frequency is corrected by using the first correction coefficient; when the second actual measurement value is determined to be higher than the second target temperature average value, generating a second correction coefficient according to the determined deviation, and correcting the current compressor operation frequency by using the second correction coefficient; wherein the first correction coefficient is a positive coefficient and the second correction coefficient is a negative coefficient.
Preferably, the control signal passively received by the controller is set by a dial switch arranged on the air conditioner.
The backup continuous operation control method of the air conditioner with one drive and a plurality of air conditioners can actively or passively switch the control strategy when the test equipment has faults or the system has large fluctuation, and ensure that the air conditioner can meet the basic working requirement without stopping, so that the air conditioner can continuously operate in a backup mode.
Meanwhile, the multi-split air conditioner adopts a backup continuous operation control method. Wherein the one dragging more air conditioner includes:
the outdoor unit comprises at least one compressor;
the outdoor units are communicated with the indoor units through refrigerant pipelines;
a first measuring device is arranged on a refrigerant pipeline connected with the compressor;
a memory having stored therein at least one target pressure value and at least one pressure limit value;
and a controller;
the method comprises the following steps:
the first measuring device determines a first actual measurement value representing a pressure in a refrigerant line connected to the compressor that is reached at a measuring instant under normal air conditioning operation;
the controller compares the first actual measurement value with the target pressure value of the corresponding working mode, and corrects the current compressor operating frequency according to the determined deviation under the condition that the first actual measurement value and the target pressure value are determined to have deviation;
maintaining a correction factor that corrects the current compressor operating frequency according to the determined deviation until the first actual measurement value equals a target pressure value;
when the controller compares a first actual measurement value with the target pressure value of the corresponding working mode, the first actual measurement value is compared with the pressure limit value of the corresponding working mode, and when the first actual measurement value is determined to exceed the pressure limit value, the controller actively generates or passively receives a control signal and switches the control signal to a simulation system control strategy, and in the simulation system control strategy, deviation is determined and the current operating frequency of the compressor is corrected according to the coil temperature of the indoor unit.
The multi-split air conditioner disclosed by the invention has the advantage of good stability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a flowchart illustrating a backup continuous operation control method for a multi-split air conditioner according to a first embodiment of the present invention;
FIG. 2 is a flowchart illustrating a backup continuous operation control method for a multi-split air conditioner according to a second embodiment of the present invention;
FIG. 3 is a flowchart illustrating a backup continuous operation control method for a multi-split air conditioner according to a third embodiment of the present invention;
fig. 4 is a schematic view of a refrigeration cycle structure of a multi-split air conditioner according to the present invention.
Illustration of the drawings: 100. an outdoor heat exchanger; 101. an electronic expansion valve; 103. a low pressure sensor; 104. a refrigerant line; 105. a capillary tube; 106. an oil separator; 107. a high pressure sensor; 108. a four-way valve; 109. a compressor; 110. a pressure switch; 111. an air pipe stop valve; 112. a liquid pipe stop valve; 113. an indoor unit heat exchanger; 114. coil pipe temperature sensor.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terms "first," "second," and the like in the description and claims of the present invention and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order, it being understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the invention described herein may be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a flowchart illustrating a backup continuous operation method of a multi-split air conditioner according to an embodiment of the present invention. The multi-split air conditioner comprises at least one outdoor unit, and the outdoor unit comprises at least one compressor. Under normal operating conditions, the compressor operates to ensure normal operation of the entire refrigeration system. One outdoor unit is communicated with a plurality of indoor units through refrigerant pipelines. The air conditioner also comprises a memory and a controller. At least one target pressure value, and at least one pressure limit value are stored in the memory. A first measuring device is arranged on a refrigerant pipeline connected with the compressor.
Specifically, the backup continuous operation method for the multi-split air conditioner disclosed by the embodiment comprises the following steps:
in step S101, the first measurement device determines a first actual measurement value. The first actual measurement value as defined herein represents the pressure in the refrigerant line connected to the compressor that is reached at the moment of measurement under normal air conditioning operation.
And S102, comparing the first actual measurement value with the target pressure value corresponding to the working mode by the controller, and correcting the current compressor operation frequency according to the determined deviation under the condition that the deviation is determined between the first actual measurement value and the target pressure value.
Specifically, the current compressor operating frequency may be corrected in the following two ways. The first method is to set up a one-to-one relationship between the deviation and the correction coefficient in the memory, when the deviation belongs to the corresponding numerical range, the controller calls the corresponding correction coefficient according to the numerical range of the deviation, the sum of the correction coefficient and the current compressor operation frequency is the corrected compressor operation frequency, in this correction mode, the correction coefficients corresponding to a plurality of numerical ranges are in an arithmetic progression. The second method is to set a fixed proportional correction coefficient in the memory, and if there is a deviation, the controller calls the corresponding proportional correction coefficient, and the product of the proportional correction coefficient and the current compressor operating frequency is the corrected compressor operating frequency.
Step S103, keeping a correction coefficient for correcting the current compressor operating frequency according to the determined deviation unchanged until the first actual measurement value is equal to the target pressure value. The sampling period of the first measuring device can be adjusted and selected according to the actual model and the installation area.
And step S104, comparing the first actual measurement value with the target pressure value corresponding to the working mode and comparing the first actual measurement value with the pressure limit value corresponding to the working mode by the controller. And under the condition that the first actual measurement value is determined to exceed the pressure limit value, the controller actively generates or passively receives a control signal and switches to a simulation system control strategy, and in the simulation system control strategy, deviation is determined and the current operating frequency of the compressor is corrected according to the temperature of a coil of the indoor unit. Generally speaking, in the case where it is determined that the first actual measurement value exceeds the pressure limit value, the controller preferably simultaneously generates an alarm signal and sends the alarm signal to the server side or to a mobile terminal having a maintenance authority via telecommunication to notify the maintenance personnel of further repair processing. After the control strategy of the simulation system is switched, the whole air conditioner can keep normal operation. The absolute value of the pressure limit value is greater than that of the target pressure value, preferably 1.5 times to 2 times of the target pressure value, so that the switching times of the control strategy are reduced, and the impact on other equipment is reduced.
Specifically, as shown in fig. 4, the first measuring device includes a high pressure sensor 107 disposed at a high pressure end of the compressor, and a low pressure sensor 103 disposed at a low pressure end of the compressor, and the target pressure values include a target high pressure corresponding to the high pressure sensor 107 and a target low pressure corresponding to the low pressure sensor 103. In the cooling mode, a deviation is determined from the first actual measurement determined by the low pressure sensor 103 and the target low pressure and a correction factor is generated. In the heating mode, a deviation is determined from the first actual measurement value determined by the high-pressure sensor 107 and the target high-pressure and a correction coefficient is generated.
In the cooling mode, the low pressure sensor 103 determines a first actual measurement value, the controller compares the first actual measurement value with a target low pressure, generates a first correction coefficient according to the determined deviation when it is determined that the first actual measurement value is higher than the target low pressure, and corrects the current compressor operating frequency using the first correction coefficient. When it is determined that the first actual measurement value is lower than the target low pressure, a second correction coefficient is generated according to the determined deviation, and the current compressor operating frequency is corrected using the second correction coefficient. The first correction coefficient is a positive coefficient, namely, the compressor is in up-frequency operation when the refrigerating condition meets the condition, and the second correction coefficient is a negative coefficient, namely, the compressor is in down-frequency operation when the refrigerating condition meets the condition.
In the heating mode, the high pressure sensor 107 determines a first actual measurement value, the controller compares the first actual measurement value with a target high pressure, generates a first correction coefficient according to the determined deviation when it is determined that the first actual measurement value is higher than the target high pressure, and corrects the current compressor operating frequency using the first correction coefficient. When the first actual measurement value is determined to be lower than the target high pressure, a second correction coefficient is generated according to the determined deviation, and the current compressor operation frequency is corrected by using the second correction coefficient. The first correction coefficient is a negative coefficient, namely when the heating condition is met, the compressor operates in a frequency reduction mode until the first actual measured value is equal to the target pressure value; the second correction coefficient is a positive coefficient, namely when the heating condition is met, the compressor is in ascending frequency operation until the first actual measured value is equal to the target pressure value.
Fig. 2 is a flowchart illustrating a backup continuous operation control method for a multi-split air conditioner according to a second embodiment of the present invention. As shown in fig. 4, a coil temperature sensor 114, i.e., a second measuring device, is provided on the heat exchanger 113 of each indoor unit. At least one target temperature value is also stored in the memory.
Specifically, when the system cannot be controlled according to the pressure and normal air conditioning capacity needs to be maintained at the same time, the controller actively generates or passively receives a control signal and switches to the analog system control strategy.
In the simulation system control strategy, the second measurement device determines a second actual measurement value representing the surface temperature of the heat exchanger in the indoor unit at the measurement instant under the normal air-conditioning operation as in step S205. Specifically, the surface temperature of the heat exchanger of the indoor unit in a normal operation state is preferable.
In step S206, the controller compares the second actual measurement value with the target temperature value corresponding to the operation mode, and corrects the current compressor operation frequency according to the determined deviation if the deviation between the second actual measurement value and the target temperature value is determined. The method of correction is described in detail in the first embodiment, and is not repeated here.
In step S207, the correction factor for correcting the current compressor operation frequency according to the determined deviation is maintained until the second actual measurement value is equal to the target temperature value.
Specifically, a first target temperature value and a second target temperature value are stored in the memory. And under the refrigeration mode, the second measurement equipment determines a second actual measurement value, the controller compares the second actual measurement value with the first target temperature value, and when the second actual measurement value is lower than the first target temperature value, a first correction coefficient is generated according to the determined deviation, and the current compressor operating frequency is corrected by using the first correction coefficient. When it is determined that the second actual measurement value is higher than the first target value, a second correction coefficient is generated according to the determined deviation, and the current compressor operating frequency is corrected using the second correction coefficient. The first correction coefficient is negative coefficient, i.e. when the refrigerating condition is satisfied, the compressor operates in down-frequency mode, and the second correction coefficient is positive coefficient, i.e. when the refrigerating condition is satisfied, the compressor operates in up-frequency mode.
Similarly, in the heating mode, the second measuring device determines a second actual measurement value, the controller compares the second actual measurement value with a second target temperature value, generates a first correction coefficient according to the determined deviation and corrects the current compressor operating frequency using the first correction coefficient when it is determined that the second actual measurement value is lower than the second target temperature value, generates a second correction coefficient according to the determined deviation and corrects the current compressor operating frequency using the second correction coefficient when it is determined that the second actual measurement value is higher than the second target temperature value. The first correction coefficient is a positive coefficient, namely, when the heating condition meets the condition, the compressor is in the frequency-increasing operation, and the second correction coefficient is a negative coefficient, namely, when the heating condition meets the condition, the compressor is in the frequency-decreasing operation.
In addition to detecting the coil temperature of one of the indoor units as a typical value for control according to the scheme disclosed in the second embodiment, a more precise manner is also disclosed in the third embodiment. Specifically, as shown in fig. 4, a second measuring device, i.e. a coil temperature sensor, is disposed on each heat exchanger of the indoor unit, and at least one target temperature average value is stored in the memory.
The third embodiment further comprises the steps of:
in step S305, in the simulation system control strategy, the second measurement device determines a second actual measurement value, where the second actual measurement value represents an average value of surface temperatures of heat exchangers in the indoor units at the measurement instant under normal air conditioning operation.
And S306, comparing the second actual measurement value with the target temperature average value of the corresponding working mode by the controller, and correcting the current compressor running frequency according to the determined deviation under the condition that the deviation is determined between the second actual measurement value and the target temperature average value.
Step S307, the correction coefficient for correcting the current compressor operation frequency according to the determined deviation is maintained until the second actual measurement value is equal to the target temperature average value.
Specifically, a first target temperature average value and a second target temperature average value are stored in the memory. And in the cooling mode, the second measuring device determines a second actual measurement value, the controller compares the second actual measurement value with the first target temperature average value, when the second actual measurement value is determined to be lower than the first target temperature average value, a first correction coefficient is generated according to the determined deviation, and the current compressor running frequency is corrected by using the first correction coefficient. When the second actual measurement value is determined to be higher than the first target temperature average value, a second correction coefficient is generated according to the determined deviation, and the current compressor operation frequency is corrected by using the second correction coefficient. The first correction coefficient is negative coefficient, i.e. when the refrigerating condition is satisfied, the compressor operates in down-frequency mode, and the second correction coefficient is positive coefficient, i.e. when the refrigerating condition is satisfied, the compressor operates in up-frequency mode.
Alternatively, in the heating mode, the second measuring device determines a second actual measured value. The controller compares the second actual measurement value with the second target temperature average value, generates a first correction coefficient according to the determined deviation when the second actual measurement value is determined to be lower than the second target temperature average value, and corrects the current compressor operating frequency by using the first correction coefficient. And when the second actual measurement value is determined to be higher than the second target temperature average value, generating a second correction coefficient according to the determined deviation, and correcting the current compressor operation frequency by using the second correction coefficient. The first correction coefficient is a positive coefficient, namely, when the heating condition meets the condition, the compressor is in the frequency-increasing operation, and the second correction coefficient is a negative coefficient, namely, when the heating condition meets the condition, the compressor is in the frequency-decreasing operation.
In addition to the control strategy of the signal switching analog system actively generated by the controller, the controller also passively receives the switching signal generated by the dial switch arranged on the air conditioner.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to execute part of the steps of the method according to the embodiments of the present invention with a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor). And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
It is obvious to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be performed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to perform all or part of the above described functions. For the specific working process of the device described above, reference may be made to the corresponding process in the foregoing method embodiment, which is not described herein again.
The invention also discloses a multi-split air conditioner, which adopts the backup continuous operation control method of the multi-split air conditioner disclosed in any one of the three embodiments. For the backup continuous operation method of the multi-split air conditioner, reference is made to the first embodiment to the third embodiment, and detailed descriptions of fig. 1 to fig. 3 in the drawings are omitted for brevity. The multi-split air conditioner adopting the control method can achieve the same technical effect.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. The backup continuous operation control method of the multi-split air conditioner is characterized in that the multi-split air conditioner comprises the following steps:
the outdoor unit comprises at least one compressor;
the outdoor units are communicated with the indoor units through refrigerant pipelines;
a first measuring device is arranged on a refrigerant pipeline connected with the compressor;
a memory having stored therein at least one target pressure value and at least one pressure limit value;
and a controller;
the method comprises the following steps:
the first measuring device determines a first actual measurement value representing a pressure in a refrigerant line connected to the compressor that is reached at a measuring instant under normal air conditioning operation;
the controller compares the first actual measurement value with the target pressure value of the corresponding working mode, and corrects the current compressor operating frequency according to the determined deviation under the condition that the first actual measurement value and the target pressure value are determined to have deviation;
maintaining a correction factor that corrects the current compressor operating frequency according to the determined deviation until the first actual measurement value equals a target pressure value;
when the controller compares the first actual measurement value with the target pressure value of the corresponding working mode, the first actual measurement value is compared with the pressure limit value of the corresponding working mode, and when the first actual measurement value is determined to exceed the pressure limit value, the controller actively generates or passively receives a control signal and switches the control signal to a simulation system control strategy, and in the simulation system control strategy, deviation is determined and the current operating frequency of the compressor is corrected according to the coil temperature of the indoor unit.
2. The backup continuous operation control method of a multi-split air conditioner according to claim 1, wherein,
the first measuring device comprises a high-pressure sensor arranged at a high-pressure end of a compressor and a low-pressure sensor arranged at a low-pressure end of the compressor, and the target pressure value comprises a target high-pressure corresponding to the high-pressure sensor and a target low-pressure corresponding to the low-pressure sensor; determining a deviation and generating a correction factor according to a first actual measurement value determined by the low pressure sensor and the target low pressure in a cooling mode; in the heating mode, a deviation is determined from the first actual measurement value determined by the high-pressure sensor and the target high-pressure and a correction factor is generated.
3. The backup continuous operation control method of a multi-split air conditioner according to claim 2, wherein,
in a cooling mode, the low-pressure sensor determines a first actual measurement value, the controller compares the first actual measurement value with the target low-pressure, when the first actual measurement value is determined to be higher than the target low-pressure, a first correction coefficient is generated according to the determined deviation, and the first correction coefficient is used for correcting the current compressor operation frequency; when the first actual measurement value is determined to be lower than the target low-pressure, generating a second correction coefficient according to the determined deviation, and correcting the current compressor operation frequency by using the second correction coefficient; wherein the first correction coefficient is a positive coefficient and the second correction coefficient is a negative coefficient;
or in the heating mode, the high-pressure sensor determines a first actual measurement value, the controller compares the first actual measurement value with the target high-pressure, when the first actual measurement value is determined to be higher than the target high-pressure, a first correction coefficient is generated according to the determined deviation, and the first correction coefficient is used for correcting the current compressor operation frequency; when the first actual measurement value is determined to be lower than the target high-pressure, generating a second correction coefficient according to the determined deviation, and correcting the current compressor operation frequency by using the second correction coefficient; wherein the first correction coefficient is a negative coefficient and the second correction coefficient is a positive coefficient.
4. A backup continuous operation control method of a multi-split air conditioner according to any one of claims 1 to 3, wherein:
a second measuring device is arranged on a heat exchanger of the indoor unit, and at least one target temperature value is stored in the memory;
further comprising the steps of:
in the simulation system control strategy, the second measurement device determines a second actual measurement value, wherein the second actual measurement value represents the surface temperature of a heat exchanger in the indoor unit at the moment of measurement under the normal air-conditioning operation;
the controller compares the second actual measurement value with the target temperature value of the corresponding working mode, and corrects the current compressor operating frequency according to the determined deviation under the condition that the second actual measurement value and the target temperature value are determined to deviate;
maintaining a correction factor for correcting the current compressor operating frequency according to the determined deviation until the second actual measurement value equals the target temperature value.
5. A backup continuous operation control method of a multi-split air conditioner according to claim 4, wherein:
a first target temperature value and a second target temperature value are stored in the memory;
in a cooling mode, the second measuring device determines a second actual measurement value, the controller compares the second actual measurement value with the first target temperature value, when the second actual measurement value is determined to be lower than the first target temperature value, a first correction coefficient is generated according to the determined deviation, and the first correction coefficient is used for correcting the current compressor operation frequency; when the second actual measurement value is determined to be higher than the first target temperature value, generating a second correction coefficient according to the determined deviation, and correcting the current compressor operation frequency by using the second correction coefficient; wherein the first correction coefficient is a negative coefficient and the second correction coefficient is a positive coefficient;
or, in the heating mode, the second measurement device determines a second actual measurement value, the controller compares the second actual measurement value with the second target temperature value, when the second actual measurement value is determined to be lower than the second target temperature value, a first correction coefficient is generated according to the determined deviation, and the current compressor operating frequency is corrected by using the first correction coefficient; when the second actual measurement value is determined to be higher than the second target temperature value, generating a second correction coefficient according to the determined deviation, and correcting the current compressor operation frequency by using the second correction coefficient; wherein the first correction coefficient is a positive coefficient and the second correction coefficient is a negative coefficient.
6. A backup continuous operation control method of a multi-split air conditioner according to any one of claims 1 to 3, wherein:
a second measuring device is arranged on a heat exchanger of the indoor unit, and at least one target temperature average value is stored in the memory;
further comprising the steps of:
in the simulation system control strategy, the second measurement device determines a second actual measurement value, wherein the second actual measurement value represents an average value of surface temperatures of heat exchangers in a plurality of indoor units at the moment of measurement under normal air-conditioning operation;
the controller compares the second actual measurement value with the target temperature average value of the corresponding working mode, and corrects the current compressor running frequency according to the determined deviation under the condition that the deviation is determined between the second actual measurement value and the target temperature average value;
maintaining a correction factor that corrects the current compressor operating frequency according to the determined deviation until the second actual measurement value equals the target temperature average value.
7. A backup continuous operation control method of a multi-split air conditioner according to claim 6, wherein:
the memory stores a first target temperature average value and a second target temperature average value;
in a cooling mode, the second measuring device determines a second actual measurement value, the controller compares the second actual measurement value with the first target temperature average value, when the second actual measurement value is determined to be lower than the first target temperature average value, a first correction coefficient is generated according to the determined deviation, and the first correction coefficient is used for correcting the current compressor running frequency; when the second actual measurement value is determined to be higher than the first target temperature average value, generating a second correction coefficient according to the determined deviation, and correcting the current compressor running frequency by using the second correction coefficient; wherein the first correction coefficient is a negative coefficient and the second correction coefficient is a positive coefficient;
or, in the heating mode, the second measurement device determines a second actual measurement value, the controller compares the second actual measurement value with the second target temperature average value, when the second actual measurement value is determined to be lower than the second target temperature average value, a first correction coefficient is generated according to the determined deviation, and the current compressor operating frequency is corrected by using the first correction coefficient; when the second actual measurement value is determined to be higher than the second target temperature average value, generating a second correction coefficient according to the determined deviation, and correcting the current compressor operation frequency by using the second correction coefficient; wherein the first correction coefficient is a positive coefficient and the second correction coefficient is a negative coefficient.
8. A backup continuous operation control method of a multi-split air conditioner according to claim 7, wherein:
the control signal passively received by the controller is set by a dial switch arranged on the air conditioner.
9. A multi-split air conditioner characterized by adopting the backup continuous operation control method of the multi-split air conditioner as claimed in any one of claims 1 to 7.
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| CN109323404B (en) * | 2018-09-30 | 2023-08-04 | 广东美的制冷设备有限公司 | Air conditioner and control method and device thereof |
| CN110067767B (en) * | 2019-04-25 | 2021-04-13 | 沈阳鼓风机集团自动控制系统工程有限公司 | Method and device for monitoring state of centrifugal compressor unit |
| CN111578472B (en) * | 2020-05-29 | 2022-03-22 | 广东美的制冷设备有限公司 | Control method and device of air conditioner outdoor unit, air conditioner outdoor unit and air conditioner |
| CN111520894B (en) * | 2020-07-03 | 2020-11-27 | 宁波奥克斯电气股份有限公司 | Output control method and device for air conditioner compressor, air conditioner and storage medium |
| CN113075471A (en) * | 2021-03-15 | 2021-07-06 | 格力电器（武汉）有限公司 | Performance test method and device for outdoor unit of air conditioner |
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Effective date of registration: 20201105 Address after: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee after: QINGDAO HAIER AIR CONDITIONER ELECTRIC Co.,Ltd. Patentee after: Haier Zhijia Co.,Ltd. Address before: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Patentee before: QINGDAO HAIER AIR CONDITIONER ELECTRIC Co.,Ltd. |