CN111425989A - Pipeline connection abnormity detection method and device and multi-split air conditioner - Google Patents
Pipeline connection abnormity detection method and device and multi-split air conditioner Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
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Abstract
The invention relates to the technical field of air conditioners, in particular to a method and a device for detecting pipeline connection abnormity and an air conditioner, wherein the method for detecting the pipeline connection abnormity comprises the steps of obtaining the pipe inlet temperature, the middle pipe temperature and the pipe outlet temperature of each indoor unit after the multi-split air conditioner runs for a first preset time, then determining abnormal indoor unit according to the size relationship of inlet pipe temperature, middle pipe temperature and outlet pipe temperature, then determining whether the pipeline connection of the abnormal indoor unit is abnormal according to the temperature difference of the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature, when determining that the pipeline connection is abnormal, whether the gas-liquid circulation in the pipeline is abnormal or not can be determined according to the temperature difference of the inlet pipe temperature, the outlet pipe temperature and the middle pipe temperature, and then the unusual type of discernment pipe connection, solved among the prior art gas-liquid pipe wrong collocation discernment untimely, later stage investigation difficulty scheduling problem.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a method and a device for detecting pipeline connection abnormity and a multi-split air conditioner.
Background
The multi-split air conditioning unit often needs one outdoor unit to drive a plurality of indoor units, thereby ensuring different requirements of customers. Wherein, an trachea and a liquid pipe are all connected to each internal unit. However, the air conditioning system, particularly the multi-split air conditioner, has the problems of internal machine series, multiple platforms, inconsistent gas and liquid pipes and the like; the phenomenon of mismatching of gas and liquid pipes can occur during maintenance or installation, and an indoor unit is connected with two gas pipes or two liquid pipes simultaneously. Under the condition, the long-term operation of the unit can seriously affect the customer experience and the reliability of the unit; meanwhile, the multi-connected air conditioning system is complex and has a plurality of pipelines, and such faults are not easy to find and remove.
Disclosure of Invention
The invention solves the problems that: the method and the device for detecting the abnormal pipeline connection and the multi-split air conditioner are provided to solve the problems that the existing multi-split air conditioner is not easy to check the abnormal pipeline connection and the like.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
in a first aspect, an embodiment of the present invention provides a method for detecting an abnormal pipe connection, where the method is applied to a multi-split air conditioner, where the multi-split air conditioner includes an outdoor unit and a plurality of indoor units, the outdoor unit is connected to the plurality of indoor units through pipes, and the method for detecting an abnormal pipe connection includes:
after the multi-split air conditioner operates in a current operation mode for a first preset time, acquiring the temperature of an inner pipe of each indoor unit within a preset sampling time period, wherein the temperature of the inner pipe comprises an inlet pipe temperature, a middle pipe temperature and an outlet pipe temperature;
determining an abnormal indoor unit in the indoor units according to the pipe inlet temperature, the middle pipe temperature and the pipe outlet temperature of the indoor units;
and judging whether the temperature difference between any two of the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature of the abnormal indoor unit meets a second preset condition so as to determine whether the pipeline connection of the abnormal indoor unit is abnormal.
The invention provides a pipeline connection abnormity detection method, which comprises the steps of obtaining the pipe inlet temperature, the middle pipe temperature and the pipe outlet temperature of each indoor unit after a multi-split air conditioner runs for a first preset time, then determining an abnormal indoor unit in the indoor unit according to the abnormity of the pipe inlet temperature, the middle pipe temperature and the pipe outlet temperature, then determining whether the pipeline connection of the abnormal indoor unit is abnormal according to the temperature difference of the pipe inlet temperature, the middle pipe temperature and the pipe outlet temperature, and when the pipeline connection is determined to be abnormal, determining whether the gas-liquid circulation in the pipeline is abnormal according to the temperature difference among the pipe inlet temperature, the pipe outlet temperature and the middle pipe temperature, further identifying the abnormal type of the pipeline connection, solving the problems of untimely identification of gas-liquid pipe mismatching, difficult later-stage inspection and the like in the prior art, improving the efficiency of installation and after-sale, and improving the customer.
In an optional embodiment, after the step of determining whether a temperature difference between any two of the pipe inlet temperature, the pipe intermediate temperature, and the pipe outlet temperature of the abnormal indoor unit satisfies a second preset condition to determine whether the abnormal indoor unit has an abnormal pipe connection, the method further includes:
when the abnormal indoor unit pipeline connection is determined to be abnormal, comparing the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature of the abnormal indoor unit with temperature thresholds so as to determine the abnormal type of the abnormal indoor unit; the exception types include: the abnormal indoor unit is connected with two air pipes simultaneously or the abnormal indoor unit is connected with two liquid pipes simultaneously.
In an optional embodiment, the temperature threshold includes a first temperature threshold and a second temperature threshold, and the step of comparing the inlet pipe temperature, the middle pipe temperature, and the outlet pipe temperature of the abnormal indoor unit with the temperature thresholds to determine the type of abnormality of the abnormal indoor unit includes:
if the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature are all smaller than or equal to a first temperature threshold value, determining that the abnormal type is that the abnormal indoor unit is connected with two liquid pipes at the same time;
and if the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature are all larger than a second temperature threshold value, determining that the abnormal type is that the abnormal indoor unit is connected with two air pipes at the same time.
The circulation condition of the refrigerant in the pipeline of the indoor unit can be judged by judging the temperature of the inner pipe, so that the type of gas-liquid circulation in the pipeline is judged, and the abnormal type of the pipeline of the indoor unit is inferred.
In an optional embodiment, after the step of comparing the inlet pipe temperature, the middle pipe temperature, and the outlet pipe temperature of the abnormal indoor unit with preset temperature thresholds to determine the abnormal type of the abnormal indoor unit, the method further includes:
switching an operation mode of the multi-split air conditioner to perform at least one repeated detection;
when the running mode of the multi-split air conditioner is a heating mode, switching to a cooling mode to carry out repeated detection; and when the running mode of the multi-split air conditioner is a cooling mode, switching to a heating mode to carry out repeated detection.
In an optional embodiment, the step of determining an abnormal indoor unit in the indoor unit according to the inlet pipe temperature, the middle pipe temperature, and the outlet pipe temperature of the indoor unit includes:
when the multi-split air conditioner works in a refrigeration mode, if the temperature of the inner pipe does not meet the following conditions: if the middle pipe temperature is lower than the outlet pipe temperature, or the temperature difference between the middle pipe temperature and the inlet pipe temperature is within a third temperature threshold, or the temperature difference between the outlet pipe temperature and the inlet pipe temperature is above a fourth temperature threshold, determining that the indoor unit is an abnormal indoor unit;
when the multi-split air conditioner works in a heating mode, if the temperature of the inner pipe does not meet the following conditions: and the pipe inlet temperature, the middle pipe temperature and the pipe outlet temperature are sequentially increased, or the difference value between the pipe outlet temperature and the middle pipe temperature is above a fifth temperature threshold, or the difference value between the middle pipe temperature and the pipe inlet temperature is above a sixth temperature threshold, and the indoor unit is determined to be an abnormal indoor unit.
In an optional embodiment, the step of determining whether the temperature difference between any two of the pipe inlet temperature, the pipe intermediate temperature, and the pipe outlet temperature of the abnormal indoor unit satisfies a second preset condition to determine whether the pipe connection of the abnormal indoor unit is abnormal includes:
judging whether the temperature difference between the pipe inlet temperature and the middle pipe temperature, the temperature difference between the middle pipe temperature and the pipe outlet temperature and the temperature difference between the pipe inlet temperature and the pipe outlet temperature meet a second preset condition or not; wherein the second preset condition is less than or equal to a seventh temperature threshold;
and when whether the temperature difference between the inlet pipe temperature and the middle pipe temperature, the temperature difference between the middle pipe temperature and the outlet pipe temperature and the temperature difference between the inlet pipe temperature and the outlet pipe temperature meet a second preset condition or not, determining that the abnormal indoor unit is abnormal in pipeline connection.
In an optional embodiment, the step of determining whether the temperature difference between any two of the pipe inlet temperature, the pipe intermediate temperature, and the pipe outlet temperature of the abnormal indoor unit satisfies a second preset condition to determine whether the pipe connection of the abnormal indoor unit is abnormal further includes:
when any one of the temperature difference between the pipe inlet temperature and the middle pipe temperature, the temperature difference between the middle pipe temperature and the pipe outlet temperature, and the temperature difference between the pipe inlet temperature and the pipe outlet temperature does not meet the second preset condition; judging whether the detection times reach a detection time threshold value or not;
if the detection times reach a detection time threshold value, determining that the multi-split air conditioner is not abnormal in pipeline connection;
and if the detection times do not reach the detection time threshold, detecting again after the multi-split air conditioner operates for a second preset time, wherein the second preset time is longer than the first preset time.
In a second aspect, an embodiment of the present invention provides a device for detecting abnormal pipe connection, where the device is applied to a multi-split air conditioner, where the multi-split air conditioner includes an outdoor unit and a plurality of indoor units, the outdoor unit is connected to the plurality of indoor units through pipes, the device for detecting abnormal pipe connection is configured to perform the method for detecting abnormal pipe connection according to any one of the foregoing embodiments, and the device for detecting abnormal pipe connection includes:
the acquisition module is used for acquiring the temperature of an inner pipe of each indoor unit within a preset sampling time period after the multi-split air conditioner operates in a current operation mode for a first preset time period, wherein the temperature of the inner pipe comprises an inlet pipe temperature, a middle pipe temperature and an outlet pipe temperature;
the processing module is used for determining an abnormal indoor unit in the indoor unit according to the pipe inlet temperature, the middle pipe temperature and the pipe outlet temperature of the indoor unit;
the processing module is further used for judging whether the temperature difference between any two of the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature of the abnormal indoor unit meets a second preset condition so as to determine whether the pipeline connection of the abnormal indoor unit is abnormal.
In an optional embodiment, the processing module is further configured to, when it is determined that the abnormal indoor unit pipe connection is abnormal, compare the pipe inlet temperature, the pipe intermediate temperature, and the pipe outlet temperature of the abnormal indoor unit with a first temperature threshold value, so as to determine an abnormal type of the abnormal indoor unit;
the exception types include: the abnormal indoor unit is connected with two air pipes simultaneously or the abnormal indoor unit is connected with two liquid pipes simultaneously.
In a third aspect, an embodiment of the present invention provides a multi-split air conditioner, which includes a controller, and the controller is configured to execute computer-readable program instructions to implement the steps of the method for detecting abnormal pipe connection according to any one of the foregoing embodiments.
Drawings
Fig. 1 is a functional block diagram of a multi-split air conditioner according to the present invention.
Fig. 2 is a system diagram of a multi-split air conditioner according to the present invention.
Fig. 3 is a schematic flow chart of a method for detecting an abnormal connection of a pipeline according to the present invention.
Fig. 4 is a schematic flow chart of another method for detecting abnormal pipe connection according to the present invention.
Fig. 5 is a schematic flow chart of another method for detecting abnormal pipe connection according to the present invention.
Fig. 6 is a schematic flow chart of another method for detecting abnormal pipe connection according to the present invention.
Fig. 7 is a schematic flow chart of another method for detecting abnormal pipe connection according to the present invention.
Fig. 8 is a schematic diagram of functional modules of a device for detecting abnormal pipe connection according to the present invention.
Description of reference numerals:
200-a multi-split air conditioner; 210-a controller; 300-a pipeline connection anomaly detection device; 310-an acquisition module; 320-processing module.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The multi-split air conditioning unit often needs one outdoor unit to drive a plurality of indoor units, thereby ensuring different requirements of customers. Wherein, an trachea and a liquid pipe are all connected to each internal unit. However, the air conditioning system, particularly the multi-split air conditioner, has the problems of internal machine series, multiple platforms, inconsistent gas and liquid pipes and the like; the phenomenon of mismatching of gas and liquid pipes can occur during maintenance or installation, and an indoor unit is connected with two gas pipes or two liquid pipes simultaneously. Under the condition, the long-term operation of the unit can seriously affect the customer experience and the reliability of the unit; meanwhile, the multi-connected air conditioning system is complex and has a plurality of pipelines, and such faults are not easy to find and remove.
Based on the above problems, the embodiment of the present invention provides a multi-split air conditioner 200, which is used for adjusting an indoor temperature and simultaneously detecting a self state, and detecting whether a pipeline is abnormal in time, so as to avoid the abnormal operation of the air conditioner due to long-term abnormal operation. Referring to fig. 1, a functional block diagram of a multi-split air conditioner 200 according to an embodiment of the present invention is shown. The multi-split air conditioner 200 includes a controller 210, and the controller 210 may execute computer instructions to implement the method for detecting an abnormality in a pipe connection according to the present invention. The device for detecting abnormal connection of a pipeline provided by the present invention includes at least one software functional module that can be stored in the controller 210 in the form of software or firmware, for example, the software functional module can be directly burned in the storage space of the controller 210, and in another embodiment, the software functional module can also be stored in another independent storage medium and executed by the controller 210.
The controller 210 may be an integrated circuit chip having signal processing capabilities. The controller 210 may be a general-purpose processor including a Central Processing Unit (CPU), a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic devices, discrete Gate or transistor logic devices, and discrete hardware components, and may implement or execute the methods, steps, and logic blocks disclosed in the embodiments of the present invention, where the general-purpose processor may be a microprocessor, and the controller 210 provided in this embodiment may also be any conventional processor.
Referring to fig. 2, in a possible implementation manner, the multi-split air conditioner 200 includes at least one outdoor unit and a plurality of indoor units, the outdoor unit is connected to the plurality of indoor units through pipes to transmit a refrigerant to different indoor units for heat exchange, in this embodiment, each indoor unit is provided with at least one temperature sensor for detecting an inner pipe temperature of the indoor unit, the inner pipe temperature includes an inlet pipe temperature, a middle pipe temperature and an outlet pipe temperature, the inlet pipe temperature is a temperature at an inlet of a coil pipe of the indoor unit, the middle pipe temperature is a temperature of a pipe in the middle of the coil pipe of the indoor unit, and the outlet pipe temperature is a temperature at an outlet of the coil pipe of the indoor.
It is to be understood that the structure shown in fig. 2 is merely an illustration, and a multi-split air conditioner may further include more or less components than those shown in fig. 1, or have a different configuration from that shown in fig. 2. The components shown in fig. 1 may be implemented in hardware, software, or a combination thereof.
Referring to fig. 3, fig. 3 is a flow chart illustrating a method for detecting an abnormal connection of a pipeline according to an embodiment of the present invention. The method for detecting abnormal pipeline connection includes steps 110 to 130.
Step 110: after the multi-split air conditioner operates in the current operation mode for a first preset time, the temperature of the inner pipe of each indoor unit is obtained within a preset sampling time period.
After the multi-connected air-conditioning system is started to operate for a first preset time, the temperature of an inner pipe of each indoor unit is obtained at regular time intervals in a preset time period, wherein the temperature of the inner pipe comprises an inlet pipe temperature, a middle pipe temperature and an outlet pipe temperature, and the average temperature is obtained as a sampling value.
The first preset time can be set to be 8-15 minutes, after the air conditioner runs for 8-15 minutes, the state is basically stable, the preset time period can be set to be 1-2 minutes, in the preset time period, for example, the pipe inlet temperature, the middle pipe temperature and the pipe outlet temperature are obtained every 10-20 seconds, and the average values of the pipe inlet temperature, the middle pipe temperature and the pipe outlet temperature are respectively obtained to serve as sampling values of the pipe inlet temperature, the middle pipe temperature and the pipe outlet temperature in the time period.
Step 120: and determining an abnormal indoor unit in the indoor unit according to the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature of the indoor unit.
If the pipeline connection of the multi-split air conditioner is normal, the pipe inlet temperature, the middle pipe temperature and the pipe outlet temperature of the indoor unit meet a specific size relationship, for example, in a refrigeration mode, the pipe outlet temperature is higher than the middle pipe temperature, and the temperature difference between the middle pipe temperature and the pipe inlet temperature and the temperature difference between the pipe outlet temperature and the pipe inlet temperature both meet certain conditions. In the detection process, whether the air conditioner is abnormal or not can be determined according to whether the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature of the indoor unit meet preset conditions or not, and the abnormal indoor unit can be determined from all the indoor units.
Step 130: and judging whether the temperature difference between any two of the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature of the abnormal indoor unit meets a second preset condition so as to determine whether the pipeline connection of the abnormal indoor unit is abnormal.
And when the abnormal indoor unit is determined, determining whether the pipeline connection of the abnormal indoor unit is abnormal according to the temperature difference between any two of the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature of the abnormal indoor unit. It can understand, when the pipe connection of indoor set is unusual after, for example, same indoor set has connected 2 trachea or 2 liquid pipes simultaneously, leads to the refrigerant can't form complete circulation, and the indoor set can't carry out normal heat exchange, and the coil pipe temperature difference everywhere of indoor set this moment is less, therefore, according to whether the difference in temperature between arbitrary two in judging into tub temperature, well pipe temperature and the exit tube temperature satisfies the second and predetermine the condition and can confirm that the pipeline of unusual indoor set is connected unusually. If the abnormal connection of the pipeline of the abnormal indoor unit is determined, corresponding alarm can be given, for example, warning information can be displayed, or corresponding light can be flickered.
The invention provides a pipeline connection abnormity detection method, which comprises the steps of obtaining the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature of each indoor unit after a multi-split air conditioner runs for a first preset time, determining an abnormal indoor unit in the indoor unit according to the abnormity of the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature, determining whether the pipeline connection of the abnormal indoor unit is abnormal according to the temperature difference of the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature, determining whether the gas-liquid circulation in a pipeline is abnormal according to the temperature difference of the inlet pipe temperature, the outlet pipe temperature and the middle pipe temperature when the pipeline connection is determined to be abnormal, further identifying the abnormal type of the pipeline connection, and solving the problems of untimely identification of wrong matching of gas and liquid pipes, difficult later-stage inspection and the like in the prior art.
In a possible implementation manner, besides determining the abnormal pipe connection of the abnormal indoor unit, it is also necessary to determine or judge the specific abnormal type of the pipe connection of the abnormal indoor unit, referring to fig. 4 on the basis of fig. 3, this embodiment further provides another method for detecting the abnormal pipe connection, where the method further includes:
step 140: when the abnormal indoor unit pipeline connection is determined to be abnormal, the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature of the abnormal indoor unit are compared with the temperature threshold value, so that the abnormal type of the abnormal indoor unit is determined.
The abnormal type of the abnormal indoor unit comprises the following steps: the abnormal indoor unit is connected with two air pipes or the abnormal indoor unit is connected with two liquid pipes.
When the multi-split air conditioner works in a cooling mode, if the pipeline connection of the indoor unit is abnormal, for example, when the indoor unit is simultaneously connected with 2 liquid pipes, the indoor unit continuously stores liquid because the system cannot normally circulate, so that the inlet pipe temperature, the outlet pipe temperature and the middle pipe temperature of the indoor unit are continuously less than or equal to a first temperature threshold value. If the indoor unit is connected with 2 air pipes at the same time, the indoor unit only has a gas-liquid mixed refrigerant and does not flow, so that the inlet pipe temperature, the outlet pipe temperature and the middle pipe temperature are continuously higher than the second temperature threshold value.
Similarly, when the multi-split air conditioner works in the heating mode, if the indoor unit is connected with 2 liquid pipes at the same time, the air storage liquid of the indoor unit is mixed with the refrigerant due to the reverse circulation of the system, and the refrigerant does not flow, so that the inlet pipe temperature, the outlet pipe temperature and the middle pipe temperature are continuously smaller than the first temperature threshold value, and if the indoor unit is connected with 2 gas pipes at the same time, the indoor unit only has the gas-liquid mixed refrigerant and does not flow, so that the inlet pipe temperature, the outlet pipe temperature and the middle pipe temperature are continuously higher than the second temperature threshold value.
Therefore, the abnormal type of the abnormal indoor unit can be determined according to the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature. And if the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature are all smaller than or equal to the first temperature threshold value, determining that the abnormal type is that the abnormal indoor unit is connected with two liquid pipes at the same time. And if the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature are all larger than the second temperature threshold value, determining that the abnormal type is that the abnormal indoor unit is connected with two air pipes at the same time.
It can be understood that, in different operation modes, the value ranges of the first temperature threshold and the second temperature threshold are different, and in the cooling mode, the value range of the first temperature threshold is 5-10 ℃, and the value range of the second temperature threshold is 10-15 ℃. Under the heating mode, the value range of the first temperature threshold is 30-40 ℃, and the value range of the second temperature threshold is 40-50 ℃.
After the step of determining the abnormal type of the abnormal indoor unit, in order to reduce the influence of misjudgment, environmental factors, or the like on the detection result, after the step of determining the abnormal type, detection should be repeated to eliminate the influencing factors, referring to fig. 5 on the basis of fig. 4, the method for detecting the abnormal pipe connection further includes:
step 150: and switching the operation modes of the multi-split air conditioner to perform at least one repeated detection.
After the abnormal type is determined, the operation mode of the multi-split air conditioner is switched to perform at least one repeated detection, that is, at least 2 detections are required. And if the operation mode of the multi-split air conditioner is the cooling mode, detecting the system again after forcibly operating the heating mode, and if the operation mode of the multi-split air conditioner is not the heating mode, detecting the system again after forcibly operating the cooling mode. And if the repeated detection is carried out for at least one time, confirming the detection result and exiting the detection process.
In a possible implementation manner, if the pipeline connection of the multi-split air conditioner is normal, the pipe inlet temperature, the middle pipe temperature and the pipe outlet temperature of the indoor unit meet a specific size relationship, in the detection process, whether the air conditioner is abnormal or not can be determined according to whether the pipe inlet temperature, the middle pipe temperature and the pipe outlet temperature of the indoor unit meet preset conditions, and the abnormal indoor unit can be determined from all the indoor units. Referring to fig. 6, based on fig. 5, the another method for detecting abnormal pipe connection provided in this embodiment will be described in detail how to determine an abnormal indoor unit in the indoor unit according to an inlet pipe temperature, an intermediate pipe temperature, and an outlet pipe temperature of the indoor unit. Step 120 includes the following cases:
step 120-1: when the multi-split air conditioner works in a refrigeration mode, if the temperature of the inner pipe does not meet the following conditions: and if the middle pipe temperature is lower than the outlet pipe temperature, or the temperature difference between the middle pipe temperature and the inlet pipe temperature is within a third temperature threshold, or the temperature difference between the outlet pipe temperature and the inlet pipe temperature is higher than a fourth temperature threshold, determining that the indoor unit is an abnormal indoor unit.
It can be understood that, when the multi-split air conditioner operates normally, the middle pipe temperature of the indoor unit is necessarily less than the outlet pipe temperature, the temperature difference between the middle pipe temperature and the inlet pipe temperature is within 2 ℃, and the temperature difference between the outlet pipe temperature and the inlet pipe temperature is above 5 ℃, therefore, when the multi-split air conditioner operates in a refrigeration mode, if the inner pipe temperature does not satisfy that the middle pipe temperature is less than the outlet pipe temperature, or the temperature difference between the middle pipe temperature and the inlet pipe temperature is within a third temperature threshold, or the temperature difference between the outlet pipe temperature and the inlet pipe temperature is above a fourth temperature threshold, the indoor unit is determined to be an abnormal indoor unit. In one possible implementation, the third temperature threshold may be set to 2 ℃ and the fourth temperature threshold may be set to 5 ℃.
Step 120-2: when the multi-split air conditioner works in the heating mode, if the temperature of the inner pipe does not meet the following conditions: and if the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature are sequentially increased, or the difference value between the outlet pipe temperature and the middle pipe temperature is above a fifth temperature threshold value, or the difference value between the middle pipe temperature and the inlet pipe temperature is above a sixth temperature threshold value, determining that the indoor unit is an abnormal indoor unit.
Similarly, when the multi-split air conditioner works in the heating mode, if the temperature of the inner pipe does not meet the following conditions: and if the pipe inlet temperature, the middle pipe temperature and the pipe outlet temperature are sequentially increased, or the difference between the pipe outlet temperature and the middle pipe temperature is not met and is more than a fifth temperature threshold, or the difference between the middle pipe temperature and the pipe inlet temperature is not met and is more than a sixth temperature threshold, the indoor unit is determined to be an abnormal indoor unit. The fifth temperature threshold may be 5-15 ℃, and the sixth temperature threshold may be 3-8 ℃.
In a possible implementation manner, it is determined whether the temperature difference between any two of the inlet pipe temperature, the middle pipe temperature, and the outlet pipe temperature of the abnormal indoor unit satisfies a second preset condition to determine whether the pipe connection of the abnormal indoor unit is abnormal, referring to fig. 7, step 130 includes the following sub-steps:
step 130-1: judging whether the temperature difference between the pipe inlet temperature and the middle pipe temperature, the temperature difference between the middle pipe temperature and the pipe outlet temperature and the temperature difference between the pipe inlet temperature and the pipe outlet temperature meet a second preset condition or not; wherein, the second preset condition is less than or equal to the seventh temperature threshold.
If the temperature difference between any two of the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature is less than or equal to the seventh temperature threshold, in this embodiment, the seventh temperature threshold may be 0.5 to 3 ℃, which indicates that the temperatures of the indoor unit at various positions of the pipeline are close to each other, and the refrigerant in the pipeline cannot complete normal circulation. And if the temperature difference between any two of the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature is less than or equal to the seventh temperature threshold value, determining that the normal indoor unit pipeline connection is abnormal.
Step 130-2: and when the temperature difference between the inlet pipe temperature and the middle pipe temperature, the temperature difference between the middle pipe temperature and the outlet pipe temperature and the temperature difference between the inlet pipe temperature and the outlet pipe temperature meet the second preset condition, determining that the abnormal indoor unit is abnormal in pipeline connection.
If any one of the temperature difference between the inlet pipe temperature and the middle pipe temperature, the temperature difference between the middle pipe temperature and the outlet pipe temperature, and the temperature difference between the inlet pipe temperature and the outlet pipe temperature does not satisfy the second preset condition, the abnormal connection of the pipelines of the indoor unit cannot be determined, and repeated detection needs to be carried out for many times to avoid misjudgment or missing judgment.
In one possible implementation, step 130 further includes:
step 130-3: when any one of the temperature difference between the pipe inlet temperature and the middle pipe temperature, the temperature difference between the middle pipe temperature and the pipe outlet temperature and the temperature difference between the pipe inlet temperature and the pipe outlet temperature does not meet a second preset condition; and judging whether the detection times reach a detection time threshold value or not.
Step 130-4: and if the detection times reach the detection time threshold, determining that the multi-split air conditioner pipeline connection is abnormal.
In this embodiment, the detection time threshold may be set to 4 times, and if the pipeline abnormality of the abnormal indoor unit cannot be identified when the number of consecutive detections reaches 4 times, it is determined that there is no abnormality in the pipeline connection of the multi-split system.
Step 130-5: and if the detection times do not reach the detection time threshold, detecting again after the multi-split air conditioner operates for a second preset time, wherein the second preset time is longer than the first preset time.
And if the detection times do not reach the detection time threshold, detecting again after the multi-split air conditioner operates for a second preset time, wherein the second preset time is longer than the first preset time. In a possible implementation manner, if the abnormal type of the abnormal indoor unit cannot be identified, the operation time of the multi-split air conditioner is extended, for example, the second preset time may be 1-2 minutes more than the first preset time, and after the operation time is extended, the detection is performed again until the abnormal type is identified by detection, or the detection frequency reaches the detection frequency threshold.
In order to execute the corresponding steps in the above embodiments and various possible implementations, an implementation of the device for detecting abnormal pipe connection is given below, please refer to fig. 8, and fig. 8 is a device 300 for detecting abnormal pipe connection according to a preferred embodiment of the present invention. It should be noted that the basic principle and the technical effects of the device 300 for detecting abnormal connection of a pipeline provided in this embodiment are substantially the same as those of the method for detecting abnormal connection of a pipeline provided in the above embodiment, and for the sake of brief description, reference may be made to the corresponding contents in the above embodiment for parts that are not mentioned in this embodiment.
The pipe connection abnormality detection apparatus 300 includes: an acquisition module 310 and a processing module 320.
The obtaining module 310 is configured to obtain the temperature of the inner tube of each indoor unit within a preset sampling time period after the multi-split air conditioner operates in the current operation mode for a first preset time period.
It is understood that, in a preferred embodiment, the obtaining module 310 can be specifically configured to execute the step 110 in the above-mentioned figures to achieve the corresponding technical effect.
The processing module 320 is configured to determine an abnormal indoor unit in the indoor unit according to the inlet pipe temperature, the middle pipe temperature, and the outlet pipe temperature of the indoor unit.
It is understood that, in a preferred embodiment, the processing module 320 can be specifically configured to execute the step 120 in the above-mentioned figures to achieve the corresponding technical effect.
The processing module 320 is further configured to determine whether a temperature difference between any two of the inlet pipe temperature, the middle pipe temperature, and the outlet pipe temperature of the abnormal indoor unit satisfies a second preset condition to determine whether the pipe connection of the abnormal indoor unit is abnormal.
It is understood that, in a preferred embodiment, the processing module 320 can be specifically configured to execute the step 130 in each of the above figures to achieve the corresponding technical effect.
The processing module 320 is further configured to compare the pipe inlet temperature, the middle pipe temperature, and the pipe outlet temperature of the abnormal indoor unit with the temperature threshold value when it is determined that the abnormal indoor unit pipe connection is abnormal, so as to determine the abnormal type of the abnormal indoor unit.
It is understood that, in a preferred embodiment, the processing module 320 is further specifically configured to execute the step 140 in each of the above-mentioned figures to achieve the corresponding technical effect.
The processing module 320 is further configured to switch the operation mode of the multi-split air conditioner to perform at least one repetitive detection after determining the type of the abnormality.
It is understood that, in a preferred embodiment, the processing module 320 is further specifically configured to execute the step 150 in each of the above figures to achieve the corresponding technical effect.
In a possible implementation manner, the processing module 320 is further configured to, when the multi-split air conditioner is operating in the cooling mode, if the temperature of the inner pipe does not satisfy: and if the middle pipe temperature is lower than the outlet pipe temperature, or the temperature difference between the middle pipe temperature and the inlet pipe temperature is within a third temperature threshold, or the temperature difference between the outlet pipe temperature and the inlet pipe temperature is higher than a fourth temperature threshold, determining that the indoor unit is an abnormal indoor unit.
It is understood that, in a preferred embodiment, the processing module 320 may be further specifically configured to perform steps 120-1 to 120-2 in the above-mentioned figures to achieve the corresponding technical effects.
In a possible implementation manner, the processing module 320 is further configured to determine whether a temperature difference between the pipe inlet temperature and the middle pipe temperature, a temperature difference between the middle pipe temperature and the pipe outlet temperature, and a temperature difference between the pipe inlet temperature and the pipe outlet temperature all satisfy a second preset condition; and when the temperature difference between the inlet pipe temperature and the middle pipe temperature, the temperature difference between the middle pipe temperature and the outlet pipe temperature and the temperature difference between the inlet pipe temperature and the outlet pipe temperature meet the second preset condition, determining that the abnormal indoor unit pipeline connection is abnormal. When any one of the temperature difference between the pipe inlet temperature and the middle pipe temperature, the temperature difference between the middle pipe temperature and the pipe outlet temperature and the temperature difference between the pipe inlet temperature and the pipe outlet temperature does not meet a second preset condition; and judging whether the detection times reach a detection time threshold value, if the detection times do not reach the detection time threshold value, detecting again after the multi-split air conditioner operates for a second preset time, wherein the second preset time is longer than the first preset time. And if the detection times reach the detection time threshold, determining that the multi-split air conditioner pipeline connection is abnormal.
It is understood that, in a preferred embodiment, the processing module 320 may be further specifically configured to perform steps 130-1 to 130-5 in the above-mentioned figures to achieve the corresponding technical effects.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented in other ways. The apparatus embodiments described above are merely illustrative, and for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, the functional modules in the embodiments of the present invention may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer readable storage medium. 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 and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The method for detecting the abnormal pipeline connection is applied to a multi-split air conditioner (200), the multi-split air conditioner (200) comprises an outdoor unit and a plurality of indoor units, the outdoor unit is connected with the indoor units through pipelines, and the method for detecting the abnormal pipeline connection comprises the following steps:
after the multi-split air conditioner (200) operates in a current operation mode for a first preset time, acquiring the temperature of an inner pipe of each indoor unit within a preset sampling time period, wherein the temperature of the inner pipe comprises an inlet pipe temperature, a middle pipe temperature and an outlet pipe temperature;
determining an abnormal indoor unit in the indoor units according to the pipe inlet temperature, the middle pipe temperature and the pipe outlet temperature of the indoor units;
and judging whether the temperature difference between any two of the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature of the abnormal indoor unit meets a second preset condition so as to determine whether the pipeline connection of the abnormal indoor unit is abnormal.
2. The method for detecting abnormal pipe connection according to claim 1, wherein after the step of determining whether the temperature difference between any two of the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature of the abnormal indoor unit satisfies a second preset condition to determine whether the abnormal indoor unit has abnormal pipe connection, the method further comprises:
when the abnormal indoor unit pipeline connection is determined to be abnormal, comparing the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature of the abnormal indoor unit with temperature thresholds so as to determine the abnormal type of the abnormal indoor unit;
the exception types include: the abnormal indoor unit is connected with two air pipes simultaneously or the abnormal indoor unit is connected with two liquid pipes simultaneously.
3. The method of claim 2, wherein the temperature thresholds include a first temperature threshold and a second temperature threshold, and the step of comparing the inlet pipe temperature, the middle pipe temperature, and the outlet pipe temperature of the abnormal indoor unit with the temperature thresholds to determine the type of abnormality of the abnormal indoor unit includes:
if the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature are all smaller than or equal to a first temperature threshold value, determining that the abnormal type is that the abnormal indoor unit is connected with two liquid pipes at the same time;
and if the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature are all larger than a second temperature threshold value, determining that the abnormal type is that the abnormal indoor unit is connected with two air pipes at the same time.
4. The method for detecting abnormal pipe connection according to claim 2, wherein after the step of comparing the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature of the abnormal indoor unit with preset temperature thresholds to determine the abnormal type of the abnormal indoor unit, the method further comprises:
switching an operation mode of the multi-split air conditioner (200) to perform at least one repetition detection;
when the operation mode of the multi-split air conditioner (200) is a heating mode, switching to a cooling mode to perform repeated detection; when the operation mode of the multi-split air conditioner (200) is a cooling mode, the multi-split air conditioner is switched to a heating mode to perform repeated detection.
5. The method of claim 1, wherein the step of determining the abnormal indoor unit in the indoor unit according to the inlet pipe temperature, the middle pipe temperature, and the outlet pipe temperature of the indoor unit comprises:
when the multi-split air conditioner (200) works in a cooling mode, if the temperature of the inner pipe does not meet the following conditions: if the middle pipe temperature is lower than the outlet pipe temperature, or the temperature difference between the middle pipe temperature and the inlet pipe temperature is within a third temperature threshold, or the temperature difference between the outlet pipe temperature and the inlet pipe temperature is above a fourth temperature threshold, determining that the indoor unit is an abnormal indoor unit;
when the multi-split air conditioner (200) works in a heating mode, if the temperature of the inner pipe does not meet the following conditions: and the pipe inlet temperature, the middle pipe temperature and the pipe outlet temperature are sequentially increased, or the difference value between the pipe outlet temperature and the middle pipe temperature is above a fifth temperature threshold, or the difference value between the middle pipe temperature and the pipe inlet temperature is above a sixth temperature threshold, and the indoor unit is determined to be an abnormal indoor unit.
6. The method for detecting abnormal pipe connection according to claim 1, wherein the step of determining whether the temperature difference between any two of the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature of the abnormal indoor unit satisfies a second preset condition to determine whether the abnormal indoor unit has abnormal pipe connection comprises:
judging whether the temperature difference between the pipe inlet temperature and the middle pipe temperature, the temperature difference between the middle pipe temperature and the pipe outlet temperature and the temperature difference between the pipe inlet temperature and the pipe outlet temperature meet a second preset condition or not; wherein the second preset condition is less than or equal to a seventh temperature threshold;
and when whether the temperature difference between the inlet pipe temperature and the middle pipe temperature, the temperature difference between the middle pipe temperature and the outlet pipe temperature and the temperature difference between the inlet pipe temperature and the outlet pipe temperature meet a second preset condition or not, determining that the abnormal indoor unit is abnormal in pipeline connection.
7. The method for detecting abnormal pipe connection according to claim 6, wherein the step of determining whether the temperature difference between any two of the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature of the abnormal indoor unit satisfies a second preset condition to determine whether the abnormal indoor unit has abnormal pipe connection further comprises:
when any one of the temperature difference between the pipe inlet temperature and the middle pipe temperature, the temperature difference between the middle pipe temperature and the pipe outlet temperature, and the temperature difference between the pipe inlet temperature and the pipe outlet temperature does not meet the second preset condition; judging whether the detection times reach a detection time threshold value or not;
if the detection times reach a detection time threshold value, determining that the pipeline connection of the multi-split air conditioner (200) is abnormal;
and if the detection times do not reach the detection time threshold value, detecting again after the multi-split air conditioner (200) operates for a second preset time, wherein the second preset time is longer than the first preset time.
8. A device for detecting abnormal pipe connection, wherein the device (300) for detecting abnormal pipe connection is applied to a multi-split air conditioner (200), the multi-split air conditioner (200) comprises an outdoor unit and a plurality of indoor units, the outdoor unit is connected with the plurality of indoor units through pipes, the device (300) for detecting abnormal pipe connection is used for performing the method for detecting abnormal pipe connection according to any one of claims 1 to 7, and the device (300) for detecting abnormal pipe connection comprises:
the system comprises an acquisition module (310) and a control module, wherein the acquisition module is used for acquiring the temperature of an inner pipe of each indoor unit in a preset sampling time period after the multi-split air conditioner (200) operates in a current operation mode for a first preset time period, and the temperature of the inner pipe comprises an inlet pipe temperature, a middle pipe temperature and an outlet pipe temperature;
the processing module (320) is used for determining an abnormal indoor unit in the indoor unit according to the pipe inlet temperature, the middle pipe temperature and the pipe outlet temperature of the indoor unit;
the processing module (320) is further configured to determine whether a temperature difference between any two of the inlet pipe temperature, the middle pipe temperature, and the outlet pipe temperature of the abnormal indoor unit satisfies a second preset condition to determine whether the abnormal indoor unit has an abnormal pipe connection.
9. The apparatus for detecting abnormal pipe connection according to claim 8, wherein the processing module (320) is further configured to compare the inlet pipe temperature, the middle pipe temperature and the outlet pipe temperature of the abnormal indoor unit with a first temperature threshold value when the abnormal indoor unit pipe connection is determined to be abnormal, so as to determine the abnormal type of the abnormal indoor unit;
the exception types include: the abnormal indoor unit is connected with two air pipes simultaneously or the abnormal indoor unit is connected with two liquid pipes simultaneously.
10. A multi-split air conditioner (200), characterized in that the multi-split air conditioner comprises a controller (210), and the controller (210) is used for executing computer readable program instructions to realize the steps of the pipe connection abnormality detection method according to any one of claims 1 to 7.
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Effective date of registration: 20221010 Address after: 315191 No. 1166 Mingguang North Road, Jiangshan Town, Ningbo, Zhejiang, Yinzhou District Patentee after: NINGBO AUX ELECTRIC Co.,Ltd. Patentee after: AUX AIR CONDITIONING LIMITED BY SHARE Ltd. Address before: 315000 No.1166 Mingguang North Road, Jiangshan Town, Yinzhou District, Ningbo City, Zhejiang Province Patentee before: NINGBO AUX ELECTRIC Co.,Ltd. Patentee before: Ningbo Oxfam intelligent commercial air conditioning manufacturing Co.,Ltd. |