CN109654663B - Multi-split air conditioner fault prompting method and device and air conditioner - Google Patents

Multi-split air conditioner fault prompting method and device and air conditioner Download PDF

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Publication number
CN109654663B
CN109654663B CN201811585303.9A CN201811585303A CN109654663B CN 109654663 B CN109654663 B CN 109654663B CN 201811585303 A CN201811585303 A CN 201811585303A CN 109654663 B CN109654663 B CN 109654663B
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temperature
air
air conditioner
liquid pipe
generating
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CN109654663A (en
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张坤坤
任小辉
刘合心
黄春
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/38—Failure diagnosis
    • 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
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • 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
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature

Abstract

The invention provides a multi-split air conditioner fault prompting method and device and an air conditioner, and relates to the technical field of air conditioners. The method and the device determine a liquid pipe temperature reference value according to the acquired second liquid pipe temperature of at least one second inner machine by acquiring the first liquid pipe temperature, the middle pipe temperature and the air pipe temperature of the first inner machine, and when T is reachedq≤Tz≤Ty1≤K1Generating a prompt message of blocking the air return inlet; when T isq≤Tz≤Ty1When the temperature of the tubes is reduced along the flowing direction of the refrigerant, the temperature of the tubes is reduced in sequence, namely the evaporator of the first inner machine does not exchange heat effectively, so that the blockage of the air return opening can be determined preliminarily; meanwhile, the temperature of the first liquid pipe is smaller than or equal to the first temperature threshold value, which indicates that a larger difference exists between the temperature of the liquid pipe and the reference value of the temperature of the liquid pipe, so that the blockage of the air return opening is further determined, and therefore, the prompt message of the blockage of the air return opening is generated to remind a user, the user can overhaul the air conditioner as early as possible, the problem of liquid return caused by the blockage of the air return opening is avoided, and the refrigeration effect of the air conditioner can be guaranteed.

Description

Multi-split air conditioner fault prompting method and device and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a multi-split air conditioner fault prompting method and device and an air conditioner.
Background
The multi-split system is a type of air conditioner, and refers to an outdoor unit connected with two or more indoor units through a pipe, and the outdoor side and the indoor side both adopt an air cooling heat exchange mode.
In the prior art, the condition of poor refrigeration effect of a multi-split system often exists due to various reasons, and the fact that the condition is caused by faults cannot be determined; if the situation is caused by the blockage of the return air inlet caused by the fact that the return air canvas is not effectively fixed in the installation of the multi-split air conditioning system, the refrigeration effect is seriously influenced, and the risk of the failure of the compressor caused by the return liquid exists, so that the problem that how to judge whether the return air inlet is blocked is urgently needed to be solved.
Disclosure of Invention
The invention solves the problem of accurately judging whether the air return inlet of the air conditioner is blocked.
In order to solve the above problems, the present invention provides a multi-split air conditioner fault prompting method, which is applied to an air conditioner, wherein the air conditioner comprises a first indoor unit and at least one second indoor unit, and the multi-split air conditioner fault prompting method comprises:
acquiring the temperature of a first liquid pipe, the temperature of a middle pipe and the temperature of an air pipe of the first inner machine;
determining a liquid pipe temperature reference value according to the obtained second liquid pipe temperature of at least one second inner machine;
when T isq≤Tz≤Ty1≤K1Generating a prompt message of blocking the air return inlet; wherein, TqIs the tracheal temperature, TzIs the middle tube temperature, Ty1Is the first tube temperature, K1Is a first temperature threshold determined based on the fluid tube temperature reference value.
Understandably, when T isq≤Tz≤Ty1When the temperature of the tubes is reduced along the flowing direction of the refrigerant, the temperature of the tubes is reduced in sequence, namely the evaporator of the first inner machine does not exchange heat effectively, so that the blockage of the air return opening can be determined preliminarily; also, under normal circumstances, the liquid pipe temperature of the first inner machine should be close to the liquid pipe temperature reference value calculated from the second liquid pipe temperature of the at least one second inner machine, but Ty1≤K1The temperature of the liquid pipe is shown to have a larger difference value with the reference value of the temperature of the liquid pipe, namely the situation that the air return inlet is blocked can exist; thus when T isq≤Tz≤Ty1≤K1When the temperature of the air pipe, the temperature of the middle pipe and the temperature of the first liquid pipe are sequentially increased and are less than or equal to the first temperature threshold value,the air return inlet blockage prompt information is generated to remind a user that the air return inlet is blocked, so that the user can overhaul the air conditioner as soon as possible, the liquid return problem caused by blockage of the air return inlet is avoided, and the refrigeration effect of the air conditioner can be guaranteed.
Further, when T isq≤Tz≤Ty1≤K1Before the step of generating the indication information of the blockage of the air return inlet, the multi-split air conditioner fault indication method further comprises the following steps:
acquiring the opening degree of an electronic expansion valve of the first internal machine;
when T isq≤Tz≤Ty1≤K1The step of generating the air return inlet blockage prompt information comprises the following steps:
when T isq≤Tz≤Ty1≤K1And D ═ DminGenerating a prompt message of blocking the air return inlet; wherein D is the opening degree of the electronic expansion valve, DminIs a preset minimum opening value.
Understandably, due to the fact that at Tq≤Tz≤Ty1≤K1In time, the condition that the air return inlet is possibly blocked can be preliminarily judged, and D-D is also metminAnd the opening degree of the electronic expansion valve is in the minimum state at the moment so as to reduce the inflow of the refrigerant, which indicates that the first internal machine has no superheat degree at the moment, namely the temperature of the air pipe is less than or equal to the temperature of the liquid pipe, so that the condition that the air return opening of a user is blocked is further determined, and the air return opening blocking prompt information is generated.
Further, when T isq≤Tz≤Ty1≤K1And D ═ DminBefore the step of generating the indication information of the blockage of the air return inlet, the multi-split air conditioner fault indication method further comprises the following steps:
acquiring the air suction temperature and the evaporation temperature of the first internal machine;
when T isq≤Tz≤Ty1≤K1And D ═ DminThe step of generating the air return inlet blockage prompt information comprises the following steps:
when T isq≤Tz≤Ty1≤K1,D＝DminAnd T iss-Tps≤K2Generating a prompt message of blocking the air return inlet; wherein, TsIs the suction temperature, TpsTo the evaporation temperature, K2Is a preset second temperature threshold.
Understandably, when T is satisfiedq≤Tz≤Ty1≤K1,D＝DminUnder the condition, the condition that the air return inlet is possibly blocked can be preliminarily judged, and T is also mets-Tps≤K2The judgment result shows that the suction superheat degree is low, so that the possibility that liquid refrigerant flows from the first inner machine to the suction port of the compressor can be inferred, that is, the liquid refrigerant in the evaporator of the first inner machine is not evaporated effectively, the condition that the air return port of a user is blocked can be determined more accurately, and the air return port blocking prompt information is generated.
Further, when T isq≤Tz≤Ty1≤K1Before the step of generating the indication information of the blockage of the air return inlet, the multi-split air conditioner fault indication method further comprises the following steps:
acquiring the air suction temperature and the evaporation temperature of the first internal machine;
when T isq≤Tz≤Ty1≤K1The step of generating the air return inlet blockage prompt information comprises the following steps:
when T isq≤Tz≤Ty1≤K1And T iss-Tps≤K2Generating a prompt message of blocking the air return inlet; wherein, TsIs the suction temperature, TpsTo the evaporation temperature, K2Is a preset second temperature threshold.
Further, K is more than or equal to-3 DEG C2≤6℃。
In a second aspect, the present invention further provides a multi-split air conditioner fault notification device, which is applied to an air conditioner, wherein the air conditioner includes a first indoor unit and at least one second indoor unit, and the multi-split air conditioner fault notification device includes:
the parameter acquisition unit is used for acquiring the first liquid pipe temperature, the middle pipe temperature and the air pipe temperature of the first inner machine;
the calculation unit is used for determining a liquid pipe temperature reference value according to the acquired second liquid pipe temperature of at least one second inner machine;
a prompt information generation unit for generating a prompt when T is reachedq≤Tz≤Ty1≤K1Generating a prompt message of blocking the air return inlet; wherein, TqIs the tracheal temperature, TzIs the middle tube temperature, Ty1Is the first tube temperature, K1Is a first temperature threshold determined based on the fluid tube temperature reference value.
Further, the parameter obtaining unit is further configured to obtain an opening degree of an electronic expansion valve of the first internal machine;
the prompt information generating unit is also used for generating a prompt information when T is reachedq≤Tz≤Ty1≤K1And D ═ DminGenerating a prompt message of blocking the air return inlet; wherein D is the opening degree of the electronic expansion valve, DminIs a preset minimum opening value.
Further, the parameter obtaining unit is further configured to obtain an air suction temperature and an evaporation temperature of the first internal machine;
the prompt information generating unit is also used for generating a prompt information when T is reachedq≤Tz≤Ty1≤K1,D＝DminAnd T iss-Tps≤K2Generating a prompt message of blocking the air return inlet; wherein, TsIs the suction temperature, TpsTo the evaporation temperature, K2Is a preset second temperature threshold.
Further, the parameter obtaining unit is further configured to obtain an air suction temperature and an evaporation temperature of the first internal machine;
the prompt information generating unit is also used for generating a prompt information when T is reachedq≤Tz≤Ty1≤K1And T iss-Tps≤K2Generating a prompt message of blocking the air return inlet; wherein, TsIs the suction temperature, TpsTo the evaporation temperature, K2Is a preset second temperature threshold.
In a third aspect, the present invention also provides an air conditioner, comprising:
a memory;
a controller;
the system comprises a first indoor unit and at least one second indoor unit; and
a multi-split system fault notification apparatus mounted to the memory and including one or more software function modules executed by the controller, the multi-split system fault notification apparatus comprising:
the parameter acquisition unit is used for acquiring the first liquid pipe temperature, the middle pipe temperature and the air pipe temperature of the first inner machine;
the calculation unit is used for determining a liquid pipe temperature reference value according to the acquired second liquid pipe temperature of at least one second inner machine;
a prompt information generation unit for generating a prompt when T is reachedq≤Tz≤Ty1≤K1Generating a prompt message of blocking the air return inlet; wherein, TqIs the tracheal temperature, TzIs the middle tube temperature, Ty1Is the first tube temperature, K1Is a first temperature threshold determined based on the fluid tube temperature reference value.
The air conditioner can generate the air return inlet blockage prompt information when the air return inlet is blocked by applying the multi-split fault prompt device, so that the condition that the air return inlet is blocked is reminded to a user, the user can overhaul the air conditioner as soon as possible, the liquid return problem caused by the blockage of the air return inlet is avoided, and the refrigeration effect of the air conditioner can be guaranteed.
Drawings
Fig. 1 is a system block diagram of an air conditioner according to an embodiment of the present invention;
fig. 2 is a block diagram of a circuit structure of an air conditioner according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a temperature sensor distribution;
fig. 4 is a flowchart of a method for prompting a multi-split fault according to an embodiment of the present invention;
fig. 5 is a functional block diagram of a multi-split fault notification apparatus according to an embodiment of the present invention;
icon: 100-an air conditioner; 110-an outdoor unit; 120-indoor machine; 130-a controller; 140-a memory; 150-parameter acquisition module; 152-a temperature sensor; 200-a multi-split fault prompting device; 210-a parameter acquisition unit; 220-a computing unit; 230-prompt information generation unit.
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 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 present invention provides an air conditioner 100 for regulating indoor ambient temperature and for alerting a user to perform maintenance when a return air inlet is blocked. Referring to fig. 1, a system block diagram of an air conditioner 100 according to an embodiment of the present invention is shown. The air conditioner 100 includes an outdoor unit 110 and at least two indoor units 120, and the outdoor unit 110 is communicated with the at least two indoor units 120.
It should be noted that the first indoor unit is any one of the at least two indoor units 120 included in the air conditioner 100, and when any one of the at least two indoor units 120 is determined as the first indoor unit, all the remaining indoor units 120 of the at least two indoor units 120 included in the air conditioner 100 except for the first indoor unit are the second indoor units.
Referring to fig. 2, a block diagram of a circuit structure of an air conditioner 100 according to an embodiment of the present invention is shown. The air conditioner 100 includes a memory 140, a controller 130, a plurality of parameter collecting modules 150, and a multi-split fault notification apparatus 200. The controller 130 is electrically connected to the memory 140 and the plurality of parameter acquisition modules 150. The multi-online malfunction alerting device 200 includes at least one of a software or firmware (firmware) stored in the memory 140.
The memory 140 may be configured to store software programs and units, such as program instructions/units corresponding to the multi-split fault notification apparatus 200 and the method in the embodiment of the present invention, and the controller 130 executes various functional applications and data processing by operating the software programs and units of the electronic expansion valve opening degree control apparatus and the method stored in the memory 140, such as the multi-split fault notification method provided in the embodiment of the present invention.
The Memory 140 may be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a Programmable Read-Only Memory (PROM), an Erasable Read-Only Memory (EPROM), an electrically Erasable Read-Only Memory (EEPROM), and the like.
Each parameter collecting module 150 is used for collecting an operation parameter of the air conditioner 100. It should be noted that each parameter collecting module 150 corresponds to one indoor unit 120, and is used for collecting an operating parameter of one indoor unit 120.
Specifically, each parameter acquisition module 150 includes at least five temperature sensors 152. Five temperature sensors 152 are each electrically connected to the controller 130.
The at least five temperature sensors 152 are respectively configured to collect a first liquid tube temperature, a middle tube temperature, an air suction temperature, and an evaporation temperature of the internal unit 120 corresponding to the parameter collection module 150, and respectively transmit the collected first liquid tube temperature, the middle tube temperature, the air suction temperature, and the evaporation temperature to the controller 130.
Please refer to fig. 3, which is a schematic distribution diagram of the temperature sensors 152. It can be understood that the temperature sensors 152 for acquiring the temperature of the first liquid pipe, the temperature of the middle pipe, and the temperature of the gas pipe are all disposed in the inner unit 120, and are sequentially disposed along the flowing direction of the refrigerant in the inner unit 120 during the refrigeration.
It will be appreciated that the configuration shown in fig. 2 is merely illustrative and that the air conditioner 100 may include more or fewer components than shown in fig. 2 or may have a different configuration than shown in fig. 2. The components shown in fig. 2 may be implemented in hardware, software, or a combination thereof.
First embodiment
The embodiment of the invention provides a multi-split fault prompting method which is applied to an air conditioner 100 and used for generating a return air inlet blockage prompting message when a return air inlet is blocked so as to remind a user of maintenance. Fig. 4 is a flowchart of a method for prompting a multi-online fault according to an embodiment of the present invention. The multi-split fault prompting method comprises the following steps:
step S401, the first liquid pipe temperature, the middle pipe temperature and the air pipe temperature of the first inner machine are obtained.
In addition, the first liquid pipe temperature, the middle pipe temperature and the gas pipe temperature of the first inner machine are acquired by 3 different temperature sensors 152 included in the parameter acquisition module 150 of the first inner machine respectively.
And step S402, determining a liquid pipe temperature reference value according to the acquired second liquid pipe temperature of the at least one second inner machine.
If the air conditioner 100 includes only one second indoor unit, the second liquid pipe temperature of the second indoor unit is determined as the liquid pipe temperature reference value.
If the air conditioner 100 includes more than two second indoor units, the second liquid pipe temperature of each second indoor unit is obtained, and the temperature values of all the second liquid pipe temperatures are averaged to be used as the liquid pipe temperature reference value.
Step S403, when T is reachedq≤Tz≤Ty1≤K1And generating a prompt message of the blockage of the air return inlet.
Wherein, TqIs the tracheal temperature, TzIs the middle tube temperature, Ty1Is the first tube temperature, K1Is a first temperature threshold determined based on the fluid tube temperature reference value.
The first temperature threshold K is1In fact, the sum of the liquid-line temperature reference value and the predetermined variation, the first temperature threshold K determined in this way1The comparison result is more accurate than a result obtained by setting a single comparison threshold as a comparison reference, wherein the comparison result is determined according to real-time operation parameters of the air conditioner 100 and is changed along with the change of the temperature of the second liquid pipe of each second internal machine.
Wherein, the preset variation range is as follows: 2 to 5 ℃; in a preferred embodiment, the preset variation is 2 ℃, i.e. the first temperature threshold value is +2 ℃.
It can be understood that, when the multi-split air conditioner is in the cooling mode and the air return opening is blocked, the evaporator of the first inner unit does not exchange heat effectively, and meanwhile, the evaporator is in the evaporation state in the cooling mode, and the evaporation process is a process of absorbing heat, so that the temperature of the tubes is reduced in sequence along the flowing direction of the refrigerant at the moment.
On the contrary, when Tq≤Tz≤Ty1And the temperature of the tubes is reduced along the flowing direction of the refrigerant, namely the evaporator of the first inner machine does not exchange heat effectively, so that the blockage of the air return opening can be determined preliminarily.
At the same time, the liquid pipe temperature of the first inner machine should normally be close to the liquid pipe temperature reference value calculated from the second liquid pipe temperature of the at least one second inner machine, but this time when Ty1≤K1And the liquid pipe temperature reference value have larger difference, namely the condition that the air return inlet is blocked can exist. Thus combining the two situations when T isq≤Tz≤Ty1≤K1That is, when the air pipe temperature, the middle pipe temperature and the first liquid pipe temperature are sequentially increased and are less than or equal to the first temperature threshold value, the air return inlet blockage prompt information is generated to remind a user that the air return inlet is blocked, so that the user can conveniently overhaul the air conditioner 100 as early as possible, and the air pipe temperature, the middle pipe temperature and the first liquid pipe temperature are prevented from being increased sequentially and are less than or equal to the first temperature threshold valueThe cooling effect of the air conditioner 100 can also be ensured due to the liquid return problem caused by the blockage of the air return inlet.
In an optional embodiment, the method for prompting a multi-split fault further includes:
and acquiring the opening degree of the electronic expansion valve of the first internal machine.
Correspondingly, step S403 includes: when T isq≤Tz≤Ty1≤K1And D ═ DminGenerating a prompt message of blocking the air return inlet; wherein D is the opening degree of the electronic expansion valve, DminIs a preset minimum opening value.
It can be understood that, since the air pipe temperature is less than or equal to the liquid pipe temperature when the multi-split air conditioner is in the cooling mode and the air return opening is blocked, the first inner unit has no overheating degree, and the opening degree of the electronic expansion valve of the first inner unit is usually adjusted to be minimum to reduce the inflow of the refrigerant, and therefore, when D ═ D is converselyminWhen the air return inlet is blocked, the situation that the air return inlet is blocked can be inferred; at the same time due to Tq≤Tz≤Ty1≤K1Thereby synthesizing Tq≤Tz≤Ty1≤K1And D ═ DminUnder the two conditions, the condition that the air return opening of the user is blocked can be accurately determined, and therefore the air return opening blocking prompt information is generated.
In an optional embodiment, the method for prompting a multi-split fault further includes:
and acquiring the air suction temperature and the evaporation temperature of the first internal machine.
Correspondingly, step S403 includes: when T isq≤Tz≤Ty1≤K1,D＝DminAnd T iss-Tps≤K2Generating a prompt message of blocking the air return inlet; wherein, TsIs the suction temperature, TpsTo the evaporation temperature, K2Is a preset second temperature threshold.
It can be understood that, when the multi-split air conditioner is in the cooling mode and the air return opening is blocked, the liquid refrigerant in the evaporator of the first inner unit is not effectively evaporated, so that the liquid refrigerant generally flows from the second inner unit to the air suction opening of the compressor, and thereforeWhereas normally the suction superheat is lower, so conversely when Ts-Tps≤K2Time, it shows that the degree of superheat of the suction gas is low, and T is integratedq≤Tz≤Ty1≤K1,D＝DminUnder the two conditions, the condition that the air return opening of the user is blocked can be determined more accurately, and therefore the air return opening blocking prompt information is generated.
Note that, when only T is satisfiedq≤Tz≤Ty1≤K1And T iss-Tps≤K2And meanwhile, the air return inlet blockage prompt information can be generated.
Further, the range of the second temperature threshold is: k is not less than 3 ℃ below zero2Less than or equal to 6 ℃; in a preferred embodiment, the second temperature threshold is 3 ℃.
Second embodiment
Referring to fig. 5, a functional block diagram of a multi-online fault notification device 200 according to an embodiment of the present invention is shown. It should be noted that the basic principle and the technical effects of the multi-online failure indication device 200 provided in the present embodiment are the same as those of the above embodiments, and for the sake of brief description, no part of the present embodiment is mentioned, and reference may be made to the corresponding contents in the above embodiments. The multi-split fault notification device 200 includes: a parameter acquisition unit 210, a calculation unit 220, and a prompt information generation unit 230.
The parameter obtaining unit 210 is configured to obtain a first liquid pipe temperature, a middle pipe temperature, and an air pipe temperature of the first internal machine.
In addition, the parameter obtaining unit 210 is further configured to obtain an opening degree of an electronic expansion valve of the first internal machine, and to obtain a suction temperature and an evaporation temperature of the first internal machine.
It is to be understood that, in an alternative embodiment, the parameter obtaining unit 210 may be configured to execute step S401.
The calculating unit 220 is configured to determine a liquid pipe temperature reference value according to the obtained second liquid pipe temperature of at least one of the second internal machines
It is to be understood that in an alternative embodiment, the calculation unit 220 may be configured to perform step S402.
The prompt message generating unit 230 is used for generating a prompt message when T is reachedq≤Tz≤Ty1≤K1Generating a prompt message of blocking the air return inlet; wherein, TqIs the tracheal temperature, TzIs the middle tube temperature, Ty1Is the first tube temperature, K1Is a first temperature threshold determined based on the fluid tube temperature reference value.
In addition, the prompt information generating unit 230 is also used for generating the prompt information when T is reachedq≤Tz≤Ty1≤K1And D ═ DminGenerating a prompt message of blocking the air return inlet; wherein D is the opening degree of the electronic expansion valve, DminIs a preset minimum opening value.
The prompt message generating unit 230 is further configured to generate a prompt message when T is reachedq≤Tz≤Ty1≤K1,D＝DminAnd T iss-Tps≤K2Generating a prompt message of blocking the air return inlet; wherein, TsIs the suction temperature, TpsTo the evaporation temperature, K2Is a preset second temperature threshold.
The prompt message generating unit 230 is further configured to generate a prompt message when T is reachedq≤Tz≤Ty1≤K1And T iss-Tps≤K2Generating a prompt message of blocking the air return inlet; wherein, TsIs the suction temperature, TpsTo the evaporation temperature, K2Is a preset second temperature threshold.
It is to be understood that, in an alternative embodiment, the prompt information generating unit 230 may be configured to execute step S403.
In summary, according to the method and the device for prompting the multi-split online fault, the first liquid pipe temperature, the middle pipe temperature and the gas pipe temperature of the first internal machine are obtained, the liquid pipe temperature reference value is determined according to the obtained second liquid pipe temperature of at least one second internal machine, and when T is reachedq≤Tz≤Ty1≤K1Generating a prompt message of blocking the air return inlet; when T isq≤Tz≤Ty1When the temperature of the tube is decreased along the flowing direction of the refrigerantLow, namely the evaporator of the first inner machine does not exchange heat effectively at this moment, so that the blockage of the air return opening can be determined preliminarily; meanwhile, the temperature of the first liquid pipe is smaller than or equal to the first temperature threshold value, which indicates that the temperature of the liquid pipe is lower than a liquid pipe temperature reference value obtained by calculation according to the temperature of the second liquid pipe of at least one second internal machine, so that the blockage of the air return opening of the first internal machine is further determined, and therefore, the blockage prompt information of the air return opening is generated, the blockage condition of the air return opening of a user is reminded, the user can overhaul the air conditioner as soon as possible, the liquid return problem caused by the blockage of the air return opening is avoided, and the refrigeration effect of the air conditioner can be guaranteed.
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.
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 (8)

1. The multi-split air conditioner fault prompting method is applied to an air conditioner (100), the air conditioner (100) comprises a first indoor unit and at least one second indoor unit, and the multi-split air conditioner fault prompting method comprises the following steps:
acquiring the temperature of a first liquid pipe, the temperature of a middle pipe and the temperature of an air pipe of the first inner machine;
determining a liquid pipe temperature reference value according to the obtained second liquid pipe temperature of at least one second inner machine;
acquiring the opening degree of an electronic expansion valve of the first internal machine;
when T isq≤Tz≤Ty1≤K1And D ═ DminGenerating a prompt message of blocking the air return inlet; wherein, TqIs the tracheal temperature, TzIs the middle tube temperature, Ty1Is the first tube temperature, K1A first temperature threshold value determined based on the liquid pipe temperature reference value, D is the opening degree of the electronic expansion valve, DminIs a preset minimum opening value.
2. A multi-split fault notification method as defined in claim 1, wherein said time T isq≤Tz≤Ty1≤K1And D ═ DminBefore the step of generating the indication information of the blockage of the air return inlet, the multi-split air conditioner fault indication method further comprises the following steps:
acquiring the air suction temperature and the evaporation temperature of the first internal machine;
when T isq≤Tz≤Ty1≤K1And D ═ DminThe step of generating the air return inlet blockage prompt information comprises the following steps:
when T isq≤Tz≤Ty1≤K1,D＝DminAnd T iss-Tps≤K2Generating a prompt message of blocking the air return inlet; wherein, TsIs the suction temperature, TpsTo the evaporation temperature, K2Is a preset second temperature threshold.
3. The multi-split air conditioner fault notification method according to claim 1, further comprising:
acquiring the air suction temperature and the evaporation temperature of the first internal machine;
when T isq≤Tz≤Ty1≤K1And T iss-Tps≤K2Generating a prompt message of blocking the air return inlet; wherein, TsIs the suction temperature, TpsTo the evaporation temperature, K2Is a preset second temperature threshold.
4. A multi-split fault notification method as in claim 2 or 3, wherein K is ≦ 3 ℃ ≦ K2≤6℃。
5. The utility model provides a many online trouble suggestion device which characterized in that is applied to air conditioner (100), air conditioner (100) include first indoor set and at least one second indoor set, many online trouble suggestion device (200) include:
the parameter acquisition unit (210) is used for acquiring the first liquid pipe temperature, the middle pipe temperature and the air pipe temperature of the first inner machine;
the calculating unit (220) is used for determining a liquid pipe temperature reference value according to the acquired second liquid pipe temperature of at least one second inner machine;
the parameter obtaining unit (210) is further used for obtaining the opening degree of an electronic expansion valve of the first internal machine;
a prompt information generation unit (230) for generating a prompt when T is detectedq≤Tz≤Ty1≤K1And D ═ DminGenerating a prompt message of blocking the air return inlet; wherein, TqIs the tracheal temperature, TzIs the middle tube temperature, Ty1Is the first tube temperature, K1A first temperature threshold value determined based on the liquid pipe temperature reference value, D is the opening degree of the electronic expansion valve, DminIs a preset minimum opening value.
6. The multi-split air conditioner fault prompting device according to claim 5, wherein the parameter obtaining unit (210) is further configured to obtain an air suction temperature and an evaporation temperature of the first indoor unit;
the prompt information generation unit (230) is also used for generating the prompt information when T is reachedq≤Tz≤Ty1≤K1,D＝DminAnd T iss-Tps≤K2Generating a prompt message of blocking the air return inlet; wherein, TsIs the suction temperature, TpsTo the evaporation temperature, K2Is a preset second temperature threshold.
7. The multi-split air conditioner fault prompting device according to claim 5, wherein the parameter obtaining unit (210) is further configured to obtain an air suction temperature and an evaporation temperature of the first indoor unit;
the prompt information generation unit (230) is also used for generating the prompt information when T is reachedq≤Tz≤Ty1≤K1And T iss-Tps≤K2Generating a prompt message of blocking the air return inlet; wherein, TsIs the suction temperature, TpsTo the evaporation temperature, K2Is a preset second temperature threshold.
8. An air conditioner, characterized in that the air conditioner (100) comprises:
a memory (140);
a controller (130);
the system comprises a first indoor unit and at least one second indoor unit; and
a multi-split line fault notification apparatus (200), said multi-split line fault notification apparatus (200) being installed in said memory (140) and comprising one or more software functional modules executed by said controller (130), said multi-split line fault notification apparatus (200) comprising:
the parameter acquisition unit (210) is used for acquiring the first liquid pipe temperature, the middle pipe temperature and the air pipe temperature of the first inner machine;
the calculating unit (220) is used for determining a liquid pipe temperature reference value according to the acquired second liquid pipe temperature of at least one second inner machine;
the parameter obtaining unit (210) is further used for obtaining the opening degree of an electronic expansion valve of the first internal machine;
a prompt information generation unit (230) for generating a prompt when T is detectedq≤Tz≤Ty1≤K1And D ═ DminGenerating a prompt message of blocking the air return inlet; wherein, TqIs the tracheal temperature, TzIs the middle tube temperature, Ty1Is the first tube temperature, K1A first temperature threshold value determined based on the liquid pipe temperature reference value, D is the opening degree of the electronic expansion valve, DminIs a preset minimum opening value.
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