CN109869868B - Air conditioner multi-split air conditioner refrigerant shortage detection method and device and air conditioner - Google Patents
Air conditioner multi-split air conditioner refrigerant shortage detection method and device and air conditioner Download PDFInfo
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Abstract
The invention provides a method and a device for detecting refrigerant shortage of a multi-split air conditioner and an air conditioner. The method for detecting the refrigerant shortage of the air conditioner multi-connected unit comprises the steps of judging whether the air conditioner multi-connected unit meets a preset refrigerant shortage detection condition or not; if the refrigerant shortage detection condition is met, starting the compressor, controlling to enter a working mode, and simultaneously obtaining an initial temperature; acquiring the working temperature after the compressor runs for a preset time; the first air valve temperature and the first liquid valve temperature corresponding to the same inner machine have a first difference value, and when the first difference value is larger than a first preset threshold value and the number of the inner machines corresponding to the first difference value which is higher than the first preset threshold value is less than the total number of the inner machines, the single inner machine is determined to meet the refrigerant lack detection condition; and determining a refrigerant shortage detection result according to the working temperature and the working mode. The scheme provided by the invention can definitely judge the refrigerant shortage phenomenon caused by the blockage of the pipelines of one or more indoor units of the air conditioner multi-connected unit through the relation between the first temperature difference of the single indoor unit and the first preset threshold value.
Description
Technical Field
The invention relates to the field of air conditioning control, in particular to a method and a device for detecting refrigerant shortage of a multi-split air conditioner and an air conditioner.
Background
The air conditioner is used as a common electric appliance for adjusting the temperature of the air environment in the scenes of families, machine rooms and the like, when the air conditioner lacks a refrigerant, the refrigerating or heating effect is often obviously poor, and the refrigerant needs to be supplemented to the air conditioner in time at the moment so as to improve the performance of the air conditioner. The judgment of whether the existing air conditioner is insufficient for refrigerant mostly adopts a manual judgment mode, for example, after-sales personnel comprehensively judge according to physical phenomena on components such as a heat exchanger, an external unit and the like of the air conditioner in combination with the refrigerating and heating effects of the air conditioner, the mode is easy to misjudge, and particularly, the poor performance can also appear under the condition that air pipes and liquid pipes of the air conditioner are blocked. Especially for the air conditioning system of the multi-split air conditioner, because a single external machine usually corresponds to a plurality of internal machines, when a corresponding air pipe or liquid pipe corresponding to a certain internal machine is blocked, the phenomenon can be shown, but at the moment, the adverse effect of the air conditioner is not caused by that the whole system lacks a refrigerant, but caused by that the air pipe or liquid pipe of a single or a plurality of internal machines is blocked lacks a refrigerant, but the judgment can not be carried out by a control system in the prior art.
Disclosure of Invention
The present invention mainly aims to overcome the defects of the prior art, and particularly provides a method and a device for detecting refrigerant shortage of an air conditioner multi-split air conditioner and an air conditioner, so as to solve the problem of refrigerant shortage caused by clearly judging whether a single or multiple indoor unit pipelines of the air conditioner multi-split air conditioner are blocked.
The invention provides a method for detecting refrigerant shortage of a multi-split air conditioner, which comprises the following steps:
judging whether the air conditioner multi-connected unit meets a preset refrigerant shortage detection condition or not;
an initial temperature obtaining step, namely starting a compressor of the air conditioning multi-split air conditioner if the air conditioning multi-split air conditioner meets the refrigerant shortage detection condition, controlling the air conditioning multi-split air conditioner to enter a working mode, and simultaneously obtaining the initial temperature of the air conditioning multi-split air conditioner;
acquiring working temperature of the air conditioner multi-split air conditioner after the compressor runs for preset time, wherein the working temperature comprises first air valve temperature of each air pipe stop valve and first liquid valve temperature of each liquid pipe stop valve;
a detection condition determining step, wherein a first difference value exists between a first air valve temperature and a first liquid valve temperature corresponding to the same indoor unit, and when the first difference value is larger than a first preset threshold value and the number of the indoor units corresponding to the first difference value which is higher than the first preset threshold value is less than the total number of the indoor units, it is determined that a single indoor unit in the multi-unit air conditioner meets a refrigerant shortage detection condition;
and a result confirmation step, namely confirming the detection result of the refrigerant lack according to the working temperature and the working mode.
Preferably, the first and second electrodes are formed of a metal,
acquiring the initial temperature of the air conditioner multi-split air conditioner, comprising the following steps: acquiring initial indoor and outdoor pipe temperatures and outdoor ring temperatures of the outdoor heat exchanger, and acquiring initial indoor pipe temperatures and initial indoor ring temperatures of the indoor heat exchangers of the indoor units;
the working temperature acquiring step further comprises: acquiring a first indoor outer pipe temperature of the outdoor heat exchanger, and acquiring a first indoor inner pipe temperature and a first indoor environment temperature of the indoor heat exchanger of each indoor unit;
the result confirmation step includes: and if a second difference value between the first indoor pipe temperature and the initial indoor pipe temperature is smaller than a second preset threshold value, a third difference value between the first indoor pipe temperature and the first indoor environment temperature is smaller than a third preset threshold value, a fourth difference value between the first outdoor pipe temperature and the outdoor environment temperature is smaller than a fourth preset threshold value, and a fifth difference value between the first outdoor pipe temperature and the initial outdoor pipe temperature is larger than a fifth preset threshold value, determining that the refrigerant lack detection result indicates that the single indoor unit of the multi-unit air conditioner lacks refrigerant.
Preferably, the first and second electrodes are formed of a metal,
the result confirmation step further comprises:
and if a second difference value between the first indoor tube temperature and the initial indoor tube temperature is smaller than a second preset threshold value, a third difference value between the first indoor tube temperature and the first indoor environment temperature is smaller than a third preset threshold value, a fourth difference value between the first outdoor tube temperature and the outdoor environment temperature is smaller than a fourth preset threshold value, and a fifth difference value between the first outdoor tube temperature and the initial outdoor tube temperature is not larger than a fifth preset threshold value, determining that the refrigerant lack detection result indicates that the whole air conditioner multi-connected unit lacks refrigerant.
Preferably, the first and second electrodes are formed of a metal,
the preset refrigerant shortage detection conditions comprise: the real-time running frequency of the compressor is higher than the first preset frequency.
Preferably, the first and second electrodes are formed of a metal,
the detection method further comprises the following steps:
and an alarm information generating step, namely generating refrigerant shortage alarm information of the air conditioner multi-split air conditioner based on a refrigerant shortage detection result of the air conditioner multi-split air conditioner in the working mode.
The invention also provides a device for detecting the lack of refrigerant in the multi-split air conditioner, which comprises:
the judging unit is used for judging whether the air-conditioning multi-connected unit meets the preset refrigerant lack detection condition or not;
the initial temperature acquisition unit is used for starting a compressor of the air conditioning multi-split air conditioner if the air conditioning multi-split air conditioner meets the refrigerant shortage detection condition, controlling the air conditioning multi-split air conditioner to enter a working mode and simultaneously acquiring the initial temperature of the air conditioning multi-split air conditioner;
the working temperature acquisition unit is used for acquiring the working temperature of the air conditioner multi-split air conditioner through a temperature sensing bulb of the air conditioner multi-split air conditioner after the compressor runs for a preset time, wherein the working temperature comprises the first air valve temperature of each air pipe stop valve and the first liquid valve temperature of each liquid pipe stop valve;
and the detection condition determining unit is used for determining that a first air valve temperature and a first liquid valve temperature corresponding to the same indoor unit have a first difference value, and when the first difference value is greater than a first preset threshold value and the number of the indoor units corresponding to the first difference value which is higher than the first preset threshold value is less than the total number of the indoor units, determining that a single indoor unit in the multi-unit air conditioner meets the refrigerant shortage detection condition.
And the result confirmation unit is used for determining the refrigerant lack detection result according to the working temperature and the working mode.
Preferably, the first and second electrodes are formed of a metal,
the initial temperature acquisition unit acquires the initial temperature of the air conditioner multi-split air conditioner, and comprises: acquiring initial indoor pipe temperature and outdoor environment temperature of an outdoor heat exchanger of the outdoor unit, and acquiring initial indoor pipe temperature and initial indoor environment temperature of indoor heat exchangers of the indoor units;
the working temperature obtaining unit is also used for: acquiring a first indoor and outdoor pipe temperature of an outdoor heat exchanger of the outdoor unit, and acquiring a first indoor pipe temperature and a first indoor environment temperature of an indoor heat exchanger of each indoor unit;
the result confirmation unit is used for: and if a second difference value between the first indoor pipe temperature and the initial indoor pipe temperature is smaller than a second preset threshold value, a third difference value between the first indoor pipe temperature and the first indoor environment temperature is smaller than a third preset threshold value, a fourth difference value between the first outdoor pipe temperature and the outdoor environment temperature is smaller than a fourth preset threshold value, and a fifth difference value between the first outdoor pipe temperature and the initial outdoor pipe temperature is larger than a fifth preset threshold value, determining that the refrigerant lack detection result indicates that the single indoor unit of the multi-unit air conditioner lacks refrigerant.
Preferably, the first and second electrodes are formed of a metal,
the result confirmation unit is further configured to:
and if a second difference value between the first indoor tube temperature and the initial indoor tube temperature is smaller than a second preset threshold value, a third difference value between the first indoor tube temperature and the first indoor environment temperature is smaller than a third preset threshold value, a fourth difference value between the first outdoor tube temperature and the outdoor environment temperature is smaller than a fourth preset threshold value, and a fifth difference value between the first outdoor tube temperature and the initial outdoor tube temperature is not larger than a fifth preset threshold value, determining that the refrigerant lack detection result indicates that the whole air conditioner multi-connected unit lacks refrigerant.
Preferably, the first and second electrodes are formed of a metal,
the preset refrigerant shortage detection conditions comprise: the real-time running frequency of the compressor is higher than the first preset frequency.
The detection device further comprises:
and the alarm information generating unit is used for generating refrigerant shortage alarm information of the air conditioner multi-split air conditioner based on the refrigerant shortage detection result of the air conditioner multi-split air conditioner in the working mode.
The invention also provides an air conditioner, which comprises a processor, a memory and a program which is stored on the memory and can run on the processor, wherein the processor realizes the method when executing the program.
The invention also provides an air conditioner comprising the device.
According to the scheme provided by the invention, the refrigerant shortage phenomenon caused by blockage of a single or multiple indoor unit pipelines of the air conditioner multi-split air conditioner can be definitely judged through the temperature difference between the air pipe stop valve and the liquid pipe stop valve corresponding to a single indoor unit, namely the magnitude relation between the first difference and the first preset threshold, so that misjudgment and misoperation caused by confusion of refrigerant shortage of the whole air conditioner and refrigerant shortage of the single indoor unit in the prior art are prevented.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a step diagram of a method for detecting refrigerant shortage of a multi-split air conditioner provided by the invention;
fig. 2 is a schematic diagram illustrating a refrigerant shortage detection device of an air conditioner multi-split air conditioner according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
According to an embodiment of the present invention, as shown in fig. 1, there is provided a method for detecting a refrigerant shortage of an air conditioning multi-split air conditioner, where the air conditioning multi-split air conditioner includes a single external unit and a plurality of (at least two) internal units, the single external unit is connected to each internal unit through a corresponding air pipe and a corresponding liquid pipe to form an air conditioning cycle, the air pipe corresponding to each internal unit is connected to an air pipe stop valve in series, and the liquid pipe corresponding to each internal unit is connected to a liquid pipe stop valve in series, and the method includes:
s102: judging whether the air conditioner multi-connected unit meets a preset refrigerant shortage detection condition or not;
s104: an initial temperature obtaining step, namely if the air conditioner multi-split air conditioner meets the refrigerant shortage detection condition, starting a compressor of the air conditioner multi-split air conditioner, controlling the air conditioner multi-split air conditioner to enter a working mode, and simultaneously obtaining the initial temperature of the air conditioner multi-split air conditioner through a temperature sensing bulb of the air conditioner multi-split air conditioner, wherein the working mode generally comprises a heating mode and a refrigerating mode, and certainly can also comprise a dehumidification mode;
s106: a working temperature obtaining step, obtaining a working temperature of the air conditioning multi-split air conditioner through a temperature sensing bulb of the air conditioning multi-split air conditioner after the compressor runs for a preset time, where the working temperature includes a first air valve temperature of each air pipe stop valve and a first liquid valve temperature of each liquid pipe stop valve, and it can be understood that the first air valve temperature and the first liquid valve temperature respectively correspond to a temperature at an end time of the preset time, and assuming that the preset time is 100s, the first air valve temperature and the second liquid valve temperature correspond to corresponding detected temperatures at the end time of 100s, and of course, the preset time may be controlled and set by a timing unit such as a timer, which is not described herein;
s108: a detection condition determining step, wherein a first difference value exists between a first air valve temperature and a first liquid valve temperature corresponding to the same indoor unit, and when the first difference value is larger than a first preset threshold value and the number of the indoor units corresponding to the first difference value which is higher than the first preset threshold value is less than the total number of the indoor units, it is determined that a single indoor unit in the multi-unit air conditioner meets a refrigerant shortage detection condition;
s110: and a result confirmation step, namely confirming the detection result of the refrigerant lack according to the working temperature and the working mode.
In order to further improve the detection reliability of the detection method, preferably,
acquiring the initial temperature of the air conditioner multi-split air conditioner, comprising the following steps: acquiring initial indoor and outdoor pipe temperatures and outdoor ring temperatures of the outdoor heat exchanger through the temperature sensing bulb, and acquiring initial indoor and indoor pipe temperatures and initial indoor ring temperatures of the indoor heat exchangers of the indoor units through the temperature sensing bulb;
the working temperature acquiring step further comprises: acquiring a first outdoor pipe temperature of the outdoor heat exchanger through the temperature sensing bulb, and acquiring a first indoor pipe temperature and a first indoor ring temperature of the indoor heat exchanger of each indoor unit through the temperature sensing bulb;
the result confirmation step includes: if a second difference value between the temperature of the first indoor pipe and the temperature of the initial indoor pipe is smaller than a second preset threshold value, a third difference value between the temperature of the first indoor pipe and the temperature of the first indoor environment is smaller than a third preset threshold value, a fourth difference value between the temperature of the first outdoor pipe and the temperature of the outdoor environment is smaller than a fourth preset threshold value, and a fifth difference value between the temperature of the first outdoor pipe and the temperature of the initial outdoor pipe is larger than a fifth preset threshold value, it is determined that the refrigerant lack detection result indicates that the single indoor unit of the multi-connected air conditioner lacks refrigerants, it needs to be emphasized that the refrigerant lack of the single indoor unit corresponds to the concept that the whole air conditioner lacks refrigerants and is not absolutely lack of only one indoor unit, and more specifically, the refrigerant lack of the single indoor unit means that when a plurality of indoor units are assumed to be N, at least one of N indoor units or less than N indoor units are lacked, meanwhile, the whole air conditioner system does not lack the refrigerant, namely, the refrigerant lack of the single indoor unit or the single indoor unit is caused by the corresponding blockage of the single indoor unit, and at the moment, the blockage phenomenon only needs to be specifically eliminated, and the refrigerant does not need to be supplemented to the whole air conditioner.
By adopting the technical scheme, the refrigerant shortage phenomenon caused by blockage of a single or multiple indoor unit pipelines of the air conditioner multi-split unit can be clearly judged through the temperature difference between the air pipe stop valve and the liquid pipe stop valve corresponding to a single indoor unit, namely the magnitude relation between the first difference value and the first preset threshold value, and misjudgment misoperation caused by confusion of refrigerant shortage of the complete unit and refrigerant shortage of the single indoor unit in the prior art is prevented.
Preferably, the first and second electrodes are formed of a metal,
the result confirmation step further comprises:
if a second difference value between the first indoor pipe temperature and the initial indoor pipe temperature is smaller than a second preset threshold value, a third difference value between the first indoor pipe temperature and the first indoor environment temperature is smaller than a third preset threshold value, a fourth difference value between the first outdoor pipe temperature and the outdoor environment temperature is smaller than a fourth preset threshold value, and a fifth difference value between the first outdoor pipe temperature and the initial outdoor pipe temperature is not greater than a fifth preset threshold value, it is determined that the refrigerant lack detection result indicates that the whole air conditioner multi-connected unit lacks refrigerant, and it is understood that the second difference value, the third difference value, the fourth difference value, the fifth difference value and the first difference value are respectively judged by the size of the corresponding preset threshold value, and corresponding judgment results are respectively formed, for example, a first condition result corresponding to the first difference value and a second condition result corresponding to the second difference value are respectively formed, and performing AND operation on the first condition result, the second condition result, the third condition result, the fourth condition result and the fifth condition result, and determining that the refrigerant lack detection result indicates that the air conditioner multi-unit complete machine lacks refrigerant. In the above-mentioned first indoor tube temperature and the indoor tube temperature of the initial indoor tube temperature refer to temperatures fed back by the indoor heat exchanger, and the first outdoor tube temperature and the outdoor tube temperature of the initial outdoor tube temperature refer to temperatures fed back by the outdoor heat exchanger, wherein it is worth mentioning that in this technical solution, the first outdoor tube temperature and the initial outdoor tube temperature are taken as temperature collection detection points on the outdoor side, that is, temperatures of the outdoor heat exchanger are not collected to detect the exhaust temperature of the compressor, so that the detection result of the temperature of the corresponding temperature sensing package can more accurately feed back the actual operation condition of the air conditioner system, for the exhaust temperature of the compressor, the change of the shortage amount of the refrigerant cannot obviously cause the change of the exhaust temperature of the compressor under certain conditions, for example, when there is no shortage of refrigerant in the system, the exhaust temperature of the compressor at this time is approximately maintained at T0 (which may be 80 ℃ in a conventional manner, when 20% of the system is lacked, the discharge temperature of the compressor is still approximately maintained at about T0 (generally about 78 ℃), and when 30% of refrigerant is lost in the system, the discharge temperature of the compressor is greatly different at the moment, which may be about 50 ℃, and indoor cooling or heating is seriously affected, so that it can be seen that when the discharge temperature is collected in a small amount of refrigerant, whether the air conditioner is lost or not cannot be determined, and the accuracy of the detection result of the refrigerant shortage can be ensured by collecting the temperature of the outdoor heat exchanger as detection data.
Preferably, the first and second electrodes are formed of a metal,
the preset refrigerant shortage detection conditions comprise: the real-time running frequency of the compressor is higher than the first preset frequency so as to prevent the occurrence of a result distortion phenomenon caused by the detection of the refrigerant lack under the condition that the compressor does not normally run.
Preferably, the first and second electrodes are formed of a metal,
the detection method further comprises the following steps:
and an alarm information generating step, namely generating refrigerant shortage alarm information of the air conditioner multi-split air conditioner based on a refrigerant shortage detection result of the air conditioner multi-split air conditioner in the working mode. The alarm mode of the alarm information can be voice, screen prompt, buzzing sound and the like.
It should be particularly noted that, under the condition that the working modes are different, the specific settings of the first preset threshold, the second preset threshold, the third preset threshold, the fourth preset threshold, and the fifth preset threshold are different, and the difference is caused by the difference between the pipeline temperature, the temperature of the valves (the aforementioned air pipe stop valve and the liquid pipe stop valve), and the indoor ambient temperature and the outdoor ambient temperature caused by the difference of the working modes, of course, the difference of the types of the indoor unit or the outdoor unit adopted in the multi-split system also causes the difference of the corresponding threshold selections, and the difference of the modes does not affect the application and implementation of the detection method of the present invention, and does not bring about the difference of the steps of the detection method of the present invention.
As shown in fig. 2, according to an embodiment of the present invention, there is also provided a device for detecting refrigerant shortage of an air conditioning multi-split air conditioner, including:
the judging unit 100 is used for judging whether the air-conditioning multi-split air conditioner meets a preset refrigerant lack detection condition;
an initial temperature obtaining unit 200, configured to start a compressor of the air conditioning multi-split air conditioner if the air conditioning multi-split air conditioner meets the refrigerant shortage detection condition, control the air conditioning multi-split air conditioner to enter a working mode, and obtain an initial temperature of the air conditioning multi-split air conditioner at the same time;
the working temperature acquiring unit 300 is configured to acquire a working temperature of the air conditioning multi-split air conditioner through a temperature sensing bulb of the air conditioning multi-split air conditioner after the compressor runs for a preset time, where the working temperature includes a first air valve temperature of each air pipe stop valve and a first liquid valve temperature of each liquid pipe stop valve;
the detection condition determining unit 400 is configured to determine that a single indoor unit of the multi-unit air conditioner meets a refrigerant shortage detection condition when a first air valve temperature and a first liquid valve temperature corresponding to the same indoor unit have a first difference, and when the first difference is greater than a first preset threshold and the number of the indoor units corresponding to the first difference which is higher than the first preset threshold is less than the total number of the indoor units.
And a result confirmation unit 500, configured to determine a refrigerant shortage detection result according to the operating temperature and the operating mode.
Preferably, the first and second electrodes are formed of a metal,
the initial temperature obtaining unit 200 obtains an initial temperature of the air conditioner multi-split air conditioner, and includes: acquiring initial indoor pipe temperature and outdoor environment temperature of an outdoor heat exchanger of the outdoor unit, and acquiring initial indoor pipe temperature and initial indoor environment temperature of indoor heat exchangers of the indoor units;
the operating temperature obtaining unit 300 is further configured to: acquiring a first indoor and outdoor pipe temperature of an outdoor heat exchanger of the outdoor unit, and acquiring a first indoor pipe temperature and a first indoor environment temperature of an indoor heat exchanger of each indoor unit;
the result confirmation unit 500 is configured to: and if a second difference value between the first indoor pipe temperature and the initial indoor pipe temperature is smaller than a second preset threshold value, a third difference value between the first indoor pipe temperature and the first indoor environment temperature is smaller than a third preset threshold value, a fourth difference value between the first outdoor pipe temperature and the outdoor environment temperature is smaller than a fourth preset threshold value, and a fifth difference value between the first outdoor pipe temperature and the initial outdoor pipe temperature is larger than a fifth preset threshold value, determining that the refrigerant lack detection result indicates that the single indoor unit of the multi-unit air conditioner lacks refrigerant.
Preferably, the first and second electrodes are formed of a metal,
the result confirmation unit 500 is further configured to:
and if a second difference value between the first indoor tube temperature and the initial indoor tube temperature is smaller than a second preset threshold value, a third difference value between the first indoor tube temperature and the first indoor environment temperature is smaller than a third preset threshold value, a fourth difference value between the first outdoor tube temperature and the outdoor environment temperature is smaller than a fourth preset threshold value, and a fifth difference value between the first outdoor tube temperature and the initial outdoor tube temperature is not larger than a fifth preset threshold value, determining that the refrigerant lack detection result indicates that the whole air conditioner multi-connected unit lacks refrigerant.
Preferably, the first and second electrodes are formed of a metal,
the preset refrigerant shortage detection conditions comprise: the real-time running frequency of the compressor is higher than the first preset frequency.
The detection device further comprises:
and the alarm information generating unit is used for generating refrigerant shortage alarm information of the air conditioner multi-split air conditioner based on the refrigerant shortage detection result of the air conditioner multi-split air conditioner in the working mode.
The invention also provides an air conditioner, which comprises a processor, a memory and a program which is stored on the memory and can run on the processor, wherein the processor realizes the method when executing the program.
The invention also provides an air conditioner comprising the device.
The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope and spirit of the invention and the following claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired, or a combination of any of these. Further, each functional unit may be integrated into one result confirmation unit, each unit may exist alone physically, or two or more units may be integrated into one unit.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and the parts serving as the control device may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The integrated unit, if implemented in the form of a software functional unit 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 Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (12)
1. A method for detecting refrigerant shortage of an air conditioner multi-split air conditioner comprises the following steps:
judging whether the air conditioner multi-connected unit meets a preset refrigerant shortage detection condition or not;
an initial temperature obtaining step, namely starting a compressor of the air conditioning multi-split air conditioner if the air conditioning multi-split air conditioner meets the refrigerant shortage detection condition, controlling the air conditioning multi-split air conditioner to enter a working mode, and simultaneously obtaining the initial temperature of the air conditioning multi-split air conditioner;
the working temperature obtaining step is that after the compressor runs for a preset time, the working temperature of the air conditioner multi-split air conditioner is obtained, wherein the working temperature comprises a first air valve temperature of each air pipe stop valve and a first liquid valve temperature of each liquid pipe stop valve, and the working temperature obtaining step is characterized by further comprising the following steps of:
a detection condition determining step, wherein a first difference value exists between a first air valve temperature and a first liquid valve temperature corresponding to the same indoor unit, and when the first difference value is larger than a first preset threshold value and the number of the indoor units corresponding to the first difference value which is higher than the first preset threshold value is less than the total number of the indoor units, it is determined that a single indoor unit in the multi-unit air conditioner meets a refrigerant shortage detection condition;
and a result confirmation step, namely confirming the detection result of the refrigerant lack according to the working temperature and the working mode.
2. The detection method according to claim 1,
acquiring the initial temperature of the air conditioner multi-split air conditioner, comprising the following steps: acquiring initial indoor and outdoor pipe temperatures and outdoor ring temperatures of the outdoor heat exchanger, and acquiring initial indoor pipe temperatures and initial indoor ring temperatures of the indoor heat exchangers of the indoor units;
the working temperature acquiring step further comprises: acquiring a first indoor outer pipe temperature of the outdoor heat exchanger, and acquiring a first indoor inner pipe temperature and a first indoor environment temperature of the indoor heat exchanger of each indoor unit;
the result confirmation step includes: and if a second difference value between the first indoor pipe temperature and the initial indoor pipe temperature is smaller than a second preset threshold value, a third difference value between the first indoor pipe temperature and the first indoor environment temperature is smaller than a third preset threshold value, a fourth difference value between the first outdoor pipe temperature and the outdoor environment temperature is smaller than a fourth preset threshold value, and a fifth difference value between the first outdoor pipe temperature and the initial outdoor pipe temperature is larger than a fifth preset threshold value, determining that the refrigerant lack detection result indicates that the single indoor unit of the multi-unit air conditioner lacks refrigerant.
3. The detection method according to claim 2,
the result confirmation step further comprises:
and if a second difference value between the first indoor tube temperature and the initial indoor tube temperature is smaller than a second preset threshold value, a third difference value between the first indoor tube temperature and the first indoor environment temperature is smaller than a third preset threshold value, a fourth difference value between the first outdoor tube temperature and the outdoor environment temperature is smaller than a fourth preset threshold value, and a fifth difference value between the first outdoor tube temperature and the initial outdoor tube temperature is not larger than a fifth preset threshold value, determining that the refrigerant lack detection result indicates that the whole air conditioner multi-connected unit lacks refrigerant.
4. The detection method according to claim 1,
the preset refrigerant shortage detection conditions comprise: the real-time running frequency of the compressor is higher than the first preset frequency.
5. The detection method according to any one of claims 1 to 4, further comprising:
and an alarm information generating step, namely generating refrigerant shortage alarm information of the air conditioner multi-split air conditioner based on a refrigerant shortage detection result of the air conditioner multi-split air conditioner in the working mode.
6. A detection device for refrigerant shortage of air conditioner multi-split air conditioner comprises:
the judging unit is used for judging whether the air-conditioning multi-connected unit meets the preset refrigerant lack detection condition or not;
the initial temperature acquisition unit is used for starting a compressor of the air conditioning multi-split air conditioner if the air conditioning multi-split air conditioner meets the refrigerant shortage detection condition, controlling the air conditioning multi-split air conditioner to enter a working mode and simultaneously acquiring the initial temperature of the air conditioning multi-split air conditioner;
the operating temperature acquisition unit is used for obtaining the operating temperature of the air conditioner multi-split air conditioner through the temperature sensing bulb of the air conditioner multi-split air conditioner after the compressor runs for the preset time, wherein the operating temperature comprises the first air valve temperature of each air pipe stop valve and the first liquid valve temperature of each liquid pipe stop valve, and the air conditioner multi-split air conditioner system is characterized by further comprising:
the detection condition determining unit is used for determining that a first air valve temperature and a first liquid valve temperature corresponding to the same indoor unit have a first difference value, and when the first difference value is larger than a first preset threshold value and the number of the indoor units corresponding to the first difference value which is higher than the first preset threshold value is less than the total number of the indoor units, determining that a single indoor unit in the multi-unit air conditioner meets a refrigerant lack detection condition;
and the result confirmation unit is used for determining the refrigerant lack detection result according to the working temperature and the working mode.
7. The detection apparatus according to claim 6,
the initial temperature acquisition unit acquires the initial temperature of the air conditioner multi-split air conditioner, and comprises: acquiring initial indoor and outdoor pipe temperatures and outdoor ring temperatures of the outdoor heat exchanger, and acquiring initial indoor pipe temperatures and initial indoor ring temperatures of the indoor heat exchangers of the indoor units;
the working temperature obtaining unit is also used for: acquiring a first indoor outer pipe temperature of the outdoor heat exchanger, and acquiring a first indoor inner pipe temperature and a first indoor environment temperature of the indoor heat exchanger of each indoor unit;
the result confirmation unit is used for: and if a second difference value between the first indoor pipe temperature and the initial indoor pipe temperature is smaller than a second preset threshold value, a third difference value between the first indoor pipe temperature and the first indoor environment temperature is smaller than a third preset threshold value, a fourth difference value between the first outdoor pipe temperature and the outdoor environment temperature is smaller than a fourth preset threshold value, and a fifth difference value between the first outdoor pipe temperature and the initial outdoor pipe temperature is larger than a fifth preset threshold value, determining that the refrigerant lack detection result indicates that the single indoor unit of the multi-unit air conditioner lacks refrigerant.
8. The detection apparatus according to claim 7,
the result confirmation unit is further configured to:
and if a second difference value between the first indoor tube temperature and the initial indoor tube temperature is smaller than a second preset threshold value, a third difference value between the first indoor tube temperature and the first indoor environment temperature is smaller than a third preset threshold value, a fourth difference value between the first outdoor tube temperature and the outdoor environment temperature is smaller than a fourth preset threshold value, and a fifth difference value between the first outdoor tube temperature and the initial outdoor tube temperature is not larger than a fifth preset threshold value, determining that the refrigerant lack detection result indicates that the whole air conditioner multi-connected unit lacks refrigerant.
9. The detection apparatus according to claim 6,
the preset refrigerant shortage detection conditions comprise: the real-time running frequency of the compressor is higher than the first preset frequency.
10. The detection device according to any one of claims 6 to 9, further comprising:
and the alarm information generating unit is used for generating refrigerant shortage alarm information of the air conditioner multi-split air conditioner based on the refrigerant shortage detection result of the air conditioner multi-split air conditioner in the working mode.
11. An air conditioner comprising a processor, a memory, and a program stored in the memory and operable on the processor, wherein the processor implements the method of any one of claims 1-5 when executing the program.
12. An air conditioner characterized by comprising the device according to any one of claims 6-10.
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| CN112611070B (en) * | 2020-12-28 | 2022-11-22 | 青岛海尔空调电子有限公司 | Air conditioner refrigerant cycle abnormity determining method and air conditioner |
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| CN104654537B (en) * | 2015-02-02 | 2017-06-06 | 珠海格力电器股份有限公司 | Method and device for detecting lack of fluorine of air conditioner multi-split air conditioner |
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