CN107894063B - Multi-split system diagnosis method and multi-split system - Google Patents

Multi-split system diagnosis method and multi-split system Download PDF

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CN107894063B
CN107894063B CN201711042150.9A CN201711042150A CN107894063B CN 107894063 B CN107894063 B CN 107894063B CN 201711042150 A CN201711042150 A CN 201711042150A CN 107894063 B CN107894063 B CN 107894063B
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temperature
heat exchanger
machine
mode
unit
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CN107894063A (en
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李华勇
许永锋
梁伯启
蒋运鹏
程威
张嘉诚
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Midea Group Co Ltd
GD Midea Heating and Ventilating Equipment Co Ltd
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Midea Group Co Ltd
GD Midea Heating and Ventilating Equipment Co Ltd
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Abstract

The invention provides a method for diagnosing a multi-split system and the multi-split system, and the method for diagnosing the multi-split system is used for the multi-split system, the multi-split system comprises a plurality of external machines and a plurality of internal machines, and the method for diagnosing the multi-split system comprises the following steps: detecting the operation mode of an outer machine and the temperature in a heat exchanger of the inner machine connected with the outer machine; detecting the indoor environment temperature of an indoor unit; and comparing the temperature in the heat exchanger with the ambient temperature according to the running mode of the external unit, and judging whether the connection between the external unit and the internal unit is wrong or not according to the comparison result. The method can judge whether the connection between the indoor unit and the outdoor unit of the multi-split air conditioner system is correct, find out the condition that the indoor units and the outdoor units of different split air conditioners are connected in a disordered way when a plurality of split air conditioner systems are installed, report to maintenance workers in time and remove faults, avoid equipment damage caused by the fact that the connection errors of the indoor units and the outdoor units are not found in time, and improve the reliability of the multi-split air conditioner system.

Description

Multi-split system diagnosis method and multi-split system
Technical Field
The invention relates to the field of air conditioners, in particular to a method for diagnosing a multi-split system and the multi-split system.
Background
Nowadays, air conditioners are gradually popularized in daily household life. However, while the air conditioner is popularized to work and living environments for people to live comfortably, some disadvantages are gradually highlighted, which is mainly reflected in the initial installation process, especially in the dense area of air conditioner installation, when a plurality of multi-split air-conditioning systems are installed on the same floor, the phenomenon that an indoor unit refrigerant connecting pipe is connected to an outdoor unit A system, but a communication connecting wire is connected to an outdoor unit B system may occur, and the situation that the outdoor unit and the indoor unit are installed in a disordered manner occurs.
Therefore, it is an urgent need to design a multi-split system for automatically diagnosing the disordered installation of the outdoor unit and the indoor unit.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art.
One aspect of the present invention provides a method of diagnosing a multi-split system.
One aspect of the present invention provides a multi-split system.
In view of the above, the present invention provides a method for diagnosing a multi-split system, where the multi-split system is used for a multi-split system, the multi-split system includes a plurality of external machines and a plurality of internal machines, and the method for diagnosing the multi-split system includes: detecting the operation mode of an outer machine and the temperature in a heat exchanger of the inner machine connected with the outer machine; detecting the indoor environment temperature of an indoor unit; and comparing the temperature in the heat exchanger with the ambient temperature according to the running mode of the external unit, and judging whether the connection between the external unit and the internal unit is wrong or not according to the comparison result.
According to the method for diagnosing the multi-split system, the operation mode information of the external unit is acquired, the temperature in the heat exchanger of the internal unit connected with the external unit is detected to be necessary information for judging whether the integral installation connection is correct or not, and the operation modes of different external units have influence on the temperature in the heat exchanger of the internal unit. The method for judging the connection error of the outdoor unit and the indoor unit in the current mode comprises the steps of measuring the temperature in a heat exchanger of the indoor unit and the indoor environment temperature of the indoor unit, comparing the numerical value or the temperature difference value interval of the temperature in the heat exchanger of the indoor unit and the environment temperature, and judging whether the connection error of the outdoor unit and the indoor unit in the current mode exists or not according to the comparison result by combining the operation mode of the outdoor unit. When the outdoor unit is in different modes, the temperature difference interval between the temperature in the heat exchanger of the indoor unit and the ambient temperature value is different, and when the mode of the outdoor unit is not matched with the temperature in the heat exchanger of the indoor unit and the ambient temperature value at the moment, the fact that the indoor unit connected with the outdoor unit is connected with a mistake can be judged. By using the method and the device, whether the connection between the external machine and the internal machine in the multi-split system is wrong or not can be judged, the data needing to be collected in the judging process is less, the judging method is simple, the connection error can be quickly and effectively found out, the damage to the multi-split system caused by the installation and connection error is avoided, the reliability of the operation of the whole system is improved, and the resource waste is caused.
In addition, the method for diagnosing the multi-split system according to the above embodiment of the present invention further has the following additional technical features:
in any of the above technical solutions, preferably, the step of detecting the operation mode of the external unit specifically includes: determining that the operation mode of the outdoor unit is any one of a shutdown mode, a cooling operation mode or a heating operation mode; the method comprises the following steps of detecting the temperature in a heat exchanger of an inner machine connected with an outer machine: and respectively detecting temperature values of at least two positions in the heat exchanger.
In the technical scheme, the mode of the operation of the external unit is divided into a shutdown mode, a cooling mode or a heating mode. By acquiring the specific running mode of the external unit, the method is important for judging whether the external unit and the internal unit have errors or not. The working modes of the external machine are different, the positions for measuring the comparison temperature are different, the comparison scheme is different, the judgment results generated by the obtained comparison results are different, and the working mode of the external machine is the basis for accurately judging the correct connection between the external machine and the internal machine during the definite detection.
The temperature values in the heat exchanger are respectively detected at least twice, namely the temperature values at two different positions, so that effective detection data can be obtained, and the influence of factors such as environment is small. The working mode of the external machine and the accurate temperature value of the heat exchanger are determined, whether the connection matching error of the internal machine and the external machine occurs in the multi-split system is beneficially judged, the judgment error caused by the judged basic data error is avoided, the connection error of the internal machine and the external machine of the multi-split system is avoided, and the running reliability of the system is improved.
In any of the above technical solutions, preferably, the step of comparing the temperature inside the heat exchanger with the ambient temperature according to the operation mode of the external unit, and determining whether the connection between the external unit and the internal unit is incorrect according to the comparison result specifically includes: detecting that the running mode of the external unit is a shutdown mode; judging whether the sum of the minimum value of the temperature in the heat exchanger and the first preset temperature is lower than the ambient temperature or not; when the sum of the minimum value of the temperature in the heat exchanger and the first preset temperature is lower than the ambient temperature, determining that the connection between the external machine and the internal machine is wrong; and/or judging whether the difference between the maximum value of the temperature in the heat exchanger and the second preset temperature is higher than the ambient temperature; and when the difference between the maximum value of the temperature in the heat exchanger and the second preset temperature is higher than the ambient temperature, determining that the connection between the external machine and the internal machine is wrong.
In the technical scheme, after the mode of the external machine is detected to be the shutdown mode, whether the sum of the minimum value of the temperature in the heat exchanger and the first preset temperature is lower than the ambient temperature or not is judged, and when the judgment result is that the sum of the minimum value of the temperature in the heat exchanger and the first preset temperature is lower than the ambient temperature, namely the sum of the minimum value of the temperature in the heat exchanger and the first preset temperature is still lower than the ambient temperature, the operation mode of the heat exchanger of the internal machine can be obtained to be the refrigeration mode, so that the minimum temperature of the heat exchanger is far lower than the ambient temperature, the operation modes of the external machine and the internal machine can be determined to be different, and therefore the connection error can be determined; when the sum of the minimum value of the temperature in the heat exchanger and the first preset temperature is not lower than the ambient temperature, it can not be determined that the connection is correct at this time, and it is necessary to determine whether the difference between the maximum value of the temperature in the heat exchanger and the second preset temperature is higher than the ambient temperature, when the difference between the maximum value of the temperature in the heat exchanger and the second preset temperature is higher than the ambient temperature, namely the temperature in the heat exchanger is higher than the ambient temperature after subtracting the second preset temperature from the maximum temperature, the operation mode of the heat exchanger of the indoor unit can be obtained as the heating mode, this results in the maximum temperature of the heat exchanger being much higher than the ambient temperature, which makes it possible to determine that the operation modes of the external unit and the internal unit are different, and therefore to determine that there is a connection error, after the heat exchanger is judged not to be in the heating mode and not to be in the cooling mode, the heat exchanger can be determined to be in the shutdown mode. It is conceivable that, in order to ensure accurate detection results, it is preferable to detect the temperature inside the heat exchanger and the ambient temperature at that time after the outdoor unit is stopped for a certain period of time, so as to reduce detection errors. According to the scheme, under the condition that the temperature in the internal machine heat exchanger, the first preset temperature, the second preset temperature and the environment temperature are detected, whether the connection between the internal machine and the external machine of the multi-online system is correct or not can be judged rapidly through comparing the related temperatures, the condition that the connection between the internal machine and the external machine of different online systems is disordered when the multi-online systems are installed is found out, the maintenance worker is timely reported and repaired, the fault is eliminated, and the reliability of the multi-online system is improved.
In any of the above technical solutions, preferably, the step of comparing the temperature inside the heat exchanger with the ambient temperature according to the operation mode of the external unit, and determining whether the connection between the external unit and the internal unit is incorrect according to the comparison result specifically includes: detecting that the operation mode of the outdoor unit is a refrigeration mode; judging whether the difference between the maximum value of the temperature in the heat exchanger and the third preset temperature is higher than the ambient temperature or not; when the difference between the maximum value of the temperature in the heat exchanger and the third preset temperature is higher than the ambient temperature, determining that the connection between the external machine and the internal machine is wrong; and/or judging whether the difference between the temperature in the heat exchanger and the ambient temperature is less than or equal to a fourth preset temperature; and when the difference between the temperature in the heat exchanger and the ambient temperature is less than or equal to a fourth preset temperature, determining that the connection between the external machine and the internal machine is wrong.
In the technical scheme, when the mode of the outdoor unit is detected to be a cooling mode, whether the difference between the maximum value of the temperature in the heat exchanger and a third preset temperature is higher than the environment temperature or not is judged, and when the difference between the maximum value of the temperature in the heat exchanger and the third preset temperature is higher than the environment temperature, namely the difference between the maximum value of the temperature in the heat exchanger and the third preset temperature is still higher than the environment temperature, the working mode of the heat exchanger of the indoor unit can be obtained at the moment, the working mode is a heating mode, the temperature in the heat exchanger is far higher than the temperature of the environment, and therefore the operation modes of the outdoor unit and the indoor unit are different, and connection errors can be determined; judging whether the difference between the temperature in the heat exchanger and the ambient temperature is smaller than or equal to a fourth preset temperature, namely subtracting the temperature in the heat exchanger from the ambient temperature to be smaller than the fourth preset temperature, namely the ambient temperature is not influenced by the temperature change of the heat exchanger, if the working mode of the indoor unit heat exchanger is a heating mode, the difference between the temperature in the indoor unit heat exchanger and the ambient temperature is larger than the fourth preset value, and if the working mode of the indoor unit heat exchanger is a cooling mode, subtracting the fourth preset temperature from the ambient temperature to be larger than the temperature of the indoor unit heat exchanger, so that the working mode of the indoor unit heat exchanger is a shutdown mode, the difference between the ambient temperature and the temperature of the indoor unit heat exchanger is caused to be in a smaller range, and thus the running modes of the outdoor unit and the indoor unit are different, and the connection.
In any of the above technical solutions, preferably, the step of comparing the temperature inside the heat exchanger with the ambient temperature according to the operation mode of the external unit, and determining whether the connection between the external unit and the internal unit is incorrect according to the comparison result specifically includes: detecting that the operation mode of the outdoor unit is a heating mode; judging whether the sum of the minimum value of the temperature in the heat exchanger and the fifth preset temperature is lower than the ambient temperature or not; when the sum of the minimum value of the temperature in the heat exchanger and the fifth preset temperature is lower than the ambient temperature, determining that the connection between the external machine and the internal machine is incorrect; and/or judging whether the difference between the temperature in the heat exchanger and the ambient temperature is less than or equal to a sixth preset temperature; and when the difference between the temperature in the heat exchanger and the ambient temperature is less than or equal to a sixth preset temperature, determining that the connection between the external machine and the internal machine is wrong.
In the technical scheme, when the mode of the outdoor unit is detected to be the heating mode, whether the sum of the minimum value of the temperature in the heat exchanger and the fifth preset temperature is lower than the ambient temperature or not is judged, namely the sum of the minimum value of the temperature in the heat exchanger and the fifth preset temperature is lower than the ambient temperature, the working mode of the indoor unit is the cooling mode, the temperature in the heat exchanger is far lower than the ambient temperature, and therefore the operation modes of the outdoor unit and the indoor unit are determined to be different, and therefore connection errors can be determined; and judging whether the difference between the temperature in the heat exchanger and the ambient temperature is less than or equal to a sixth preset temperature, namely the ambient temperature is not influenced by the temperature of the heat exchanger, if the working mode of the heat exchanger is a heating mode or a cooling mode, the absolute difference between the temperature in the heat exchanger and the ambient temperature is greater than the sixth preset temperature, and the absolute difference is not greater than the sixth preset temperature, so that the working mode of the heat exchanger is judged to be a shutdown mode, the reason that the difference between the ambient temperature and the temperature of the heat exchanger is not great is caused, the operating modes of the external machine and the internal machine are determined to be different, and the connection error can be determined.
In any of the above technical solutions, preferably, the temperature inside the heat exchanger is detected as any one or a combination of the following: and detecting the temperature at the outlet of the heat exchanger, the temperature at the inlet of the heat exchanger or the temperature between the outlet and the inlet of the heat exchanger.
In the technical scheme, the temperature in the heat exchanger is measured by acquiring and detecting the temperature at the outlet of the heat exchanger, the temperature at the inlet of the heat exchanger or the temperature between the outlet and the inlet of the heat exchanger, and the temperature in the heat exchanger is measured by independent use or combined use, so that the temperature of the heat exchanger can be represented by single use, and a judgment condition is provided for the connection judgment of the multi-split system; for a plurality of combined uses, the temperature of the heat exchanger is detected for a plurality of times, and the accuracy of the temperature information of the heat exchanger is ensured. Meanwhile, judgment information is provided for judging whether the multi-split system is in a disordered connection state or not, the condition that the multi-split system is in a disordered connection state is avoided, maintenance workers are timely reported and repaired, faults are eliminated, equipment damage caused by the fact that connection errors of the inner unit and the outer unit are not found timely is avoided, and reliability of the multi-split system is improved.
A second aspect of the present invention provides a multi-split system. The method comprises the following steps: the first detection device is arranged on the outer machine and used for detecting the operation mode of the outer machine; the second detection device is arranged on the inner machine connected with the outer machine and used for detecting the temperature in a heat exchanger of the inner machine; the third detection device is arranged in the room where the internal machine is positioned and used for detecting the indoor environment temperature where the internal machine is positioned; and the control device is used for comparing the temperature in the heat exchanger with the ambient temperature according to the running mode of the external unit and judging whether the connection between the external unit and the internal unit is wrong or not according to the comparison result.
In the multi-split system, the operation mode information of the external unit is acquired through the first detection device, and the temperature in the heat exchanger of the internal unit connected with the external unit is detected through the second detection device, which is necessary information for judging whether the whole installation connection is correct or not, and different operation modes of the external unit have influence on the temperature in the heat exchanger of the internal unit. The method for judging the connection error of the outdoor unit comprises the steps of measuring the temperature in a heat exchanger of the indoor unit and the indoor environment temperature of the indoor unit detected by a third detection device, comparing the temperature in the heat exchanger of the indoor unit with the environment temperature value or a temperature difference value interval by utilizing a control device, and judging whether the connection of the outdoor unit and the indoor unit in the current mode is error or not according to the comparison result by combining the operation mode of the outdoor unit. By using the method and the device, whether the connection between the external machine and the internal machine in the multi-split system is wrong or not can be judged, the data needing to be collected in the judging process is less, the judging method is simple, the connection error can be quickly and effectively found out, the damage to the multi-split system caused by the installation and connection error is avoided, the reliability of the operation of the whole system is improved, and the resource waste is caused.
In any of the above technical solutions, preferably, the first detecting device is specifically configured to: determining that the operation mode of the outdoor unit is any one of a shutdown mode, a refrigeration operation mode or a heating operation mode; the second detection device is specifically configured to: the method comprises the following steps of detecting the temperature in a heat exchanger of an inner machine connected with the outer machine: and respectively detecting temperature values of at least two positions in the heat exchanger.
In the technical scheme, the mode of the operation of the external unit is divided into a shutdown mode, a cooling mode or a heating mode. By acquiring the specific running mode of the external unit, the method is important for judging whether the external unit and the internal unit have errors or not. The working modes of the external machine are different, the positions for measuring the comparison temperature are different, the comparison scheme is different, the judgment results generated by the obtained comparison results are different, and the working mode of the external machine is the basis for accurately judging the correct connection between the external machine and the internal machine during the definite detection. The second detection device is specifically configured to: the method comprises the following steps of detecting the temperature in a heat exchanger of an inner machine connected with the outer machine: and respectively detecting temperature values of at least two positions in the heat exchanger. The temperature values in the heat exchanger are respectively detected at least twice, namely the temperature values at two different positions, so that effective detection data can be obtained, and the influence of factors such as environment is small. The working mode of the external machine and the accurate temperature value of the heat exchanger are determined, whether the connection matching error of the internal machine and the external machine occurs in the multi-split system is beneficially judged, the judgment error caused by the judged basic data error is avoided, the connection error of the internal machine and the external machine of the multi-split system is avoided, and the running reliability of the system is improved.
In any one of the above technical solutions, preferably, the control device is specifically configured to: after the first detection device detects that the operation mode of the external unit is a shutdown mode, judging whether the sum of the minimum value of the temperature in the heat exchanger and a first preset temperature is lower than the environmental temperature; when the sum of the minimum value of the temperature in the heat exchanger and a first preset temperature is lower than the environment temperature, determining that the connection between the external machine and the internal machine is wrong; and/or judging whether the difference between the maximum value of the temperature in the heat exchanger and a second preset temperature is higher than the ambient temperature; and when the difference between the maximum value of the temperature in the heat exchanger and the second preset temperature is lower than the environmental temperature, determining that the connection between the external machine and the internal machine is wrong.
In the technical scheme, after the first detection device detects that the mode of the external machine is a shutdown mode, the control device judges whether the sum of the minimum value of the temperature in the heat exchanger and the first preset temperature is lower than the ambient temperature, and when the judgment result is that the sum of the minimum value of the temperature in the heat exchanger and the first preset temperature is lower than the ambient temperature, namely the sum of the minimum value of the temperature in the heat exchanger and the first preset temperature is still lower than the ambient temperature, the operation mode of the heat exchanger of the internal machine is a refrigeration mode, so that the minimum temperature of the heat exchanger is far lower than the ambient temperature, the operation modes of the external machine and the internal machine can be determined to be different, and therefore connection errors can be determined; when the sum of the minimum value of the temperature in the heat exchanger and the first preset temperature is not lower than the ambient temperature, it can not be determined that the connection is correct at this time, and it is necessary to determine whether the difference between the maximum value of the temperature in the heat exchanger and the second preset temperature is higher than the ambient temperature, when the difference between the maximum value of the temperature in the heat exchanger and the second preset temperature is higher than the ambient temperature, namely the temperature in the heat exchanger is higher than the ambient temperature after subtracting the second preset temperature from the maximum temperature, the operation mode of the heat exchanger of the indoor unit can be obtained as the heating mode, this results in the maximum temperature of the heat exchanger being much higher than the ambient temperature, which makes it possible to determine that the operation modes of the external unit and the internal unit are different, and therefore to determine that there is a connection error, after the heat exchanger is judged not to be in the heating mode and not to be in the cooling mode, the heat exchanger can be determined to be in the shutdown mode. It is conceivable that, in order to ensure accurate detection results, it is preferable to detect the temperature inside the heat exchanger and the ambient temperature at that time after the outdoor unit is stopped for a certain period of time, so as to reduce detection errors. According to the scheme, under the condition that the temperature in the internal machine heat exchanger, the first preset temperature, the second preset temperature and the environment temperature are detected, whether the connection between the internal machine and the external machine of the multi-online system is correct or not can be judged rapidly through comparing the related temperatures, the condition that the connection between the internal machine and the external machine of different online systems is disordered when the multi-online systems are installed is found out, the maintenance worker is timely reported and repaired, the fault is eliminated, and the reliability of the multi-online system is improved.
In any one of the above technical solutions, preferably, the control device is specifically configured to: after the first detection device detects that the operation mode of the outdoor unit is a refrigeration mode, judging whether the difference between the maximum value of the temperature in the heat exchanger and a third preset temperature is lower than the environmental temperature; when the difference between the maximum value of the temperature in the heat exchanger and the third preset temperature is equal to the environmental temperature, determining that the connection between the external machine and the internal machine is wrong; and/or judging whether the difference between the temperature in the heat exchanger and the ambient temperature is higher than or equal to a fourth preset temperature; and when the difference between the temperature in the heat exchanger and the ambient temperature is higher than or equal to a fourth preset temperature, determining that the connection between the external machine and the internal machine is wrong.
In the technical scheme, when the first detection device detects that the mode of the outdoor unit is a refrigeration mode, the control device judges whether the difference between the maximum value of the temperature in the heat exchanger and a third preset temperature is higher than the ambient temperature, and judges that when the difference between the maximum value of the temperature in the heat exchanger and the third preset temperature is higher than the ambient temperature, namely the difference between the maximum value of the temperature in the heat exchanger and the third preset temperature is still higher than the ambient temperature, the working mode of the heat exchanger of the indoor unit can be a heating mode at the moment, so that the temperature in the heat exchanger is far higher than the ambient temperature, and the operation modes of the outdoor unit and the indoor unit can be determined to be different, and therefore, the connection error can be determined; judging whether the difference between the temperature in the heat exchanger and the ambient temperature is less than or equal to a fourth preset temperature, namely subtracting the temperature in the heat exchanger from the ambient temperature to be less than the fourth preset temperature, namely the ambient temperature is not influenced by the temperature change of the heat exchanger, if the working mode of the indoor unit heat exchanger is a heating mode, the difference between the temperature in the indoor unit heat exchanger and the ambient temperature is greater than the fourth preset value, if the working mode of the indoor unit heat exchanger is a cooling mode, the ambient temperature is less than the temperature of the indoor unit heat exchanger by the fourth preset temperature, so that the working mode of the indoor unit heat exchanger is a shutdown mode, the difference between the ambient temperature and the temperature of the indoor unit heat exchanger is in a smaller range, the running modes of the outdoor unit and the indoor unit are different, the connection error can be determined, and the condition that the indoor unit and the outdoor unit of different on-line are connected in a disordered way when a plurality, and the system can report and repair the maintenance workers in time and eliminate faults, so that the reliability of the multi-split system is improved.
In the above invention, preferably, the control device is specifically configured to: after the first detection device detects that the operation mode of the outdoor unit is a heating mode, judging whether the sum of the minimum value of the temperature in the heat exchanger and a fifth preset temperature is lower than the environmental temperature or not; when the sum of the minimum value of the temperature in the heat exchanger and a fifth preset temperature is lower than the environmental temperature, determining that the connection between the external machine and the internal machine is wrong; and/or judging whether the difference between the temperature in the heat exchanger and the ambient temperature is less than or equal to a sixth preset temperature; and when the difference between the temperature in the heat exchanger and the ambient temperature is less than or equal to a sixth preset temperature, determining that the connection between the external machine and the internal machine is wrong.
In the technical scheme, when the first detection device detects that the mode of the external machine is the heating mode, the control device judges whether the sum of the minimum value of the temperature in the heat exchanger and the fifth preset temperature is lower than the ambient temperature, namely the sum of the minimum value of the temperature in the heat exchanger and the fifth preset temperature is lower than the ambient temperature, the working mode of the internal machine is the cooling mode at the moment, the temperature in the heat exchanger is far lower than the ambient temperature, and therefore the operation modes of the external machine and the internal machine are different, and therefore connection errors can be determined; and judging whether the difference between the temperature in the heat exchanger and the ambient temperature is less than or equal to a sixth preset temperature, namely the ambient temperature is not influenced by the temperature of the heat exchanger, if the working mode of the heat exchanger is a heating mode or a cooling mode, the absolute difference between the temperature in the heat exchanger and the ambient temperature is greater than the sixth preset temperature, and the absolute difference is not greater than the sixth preset temperature, so that the working mode of the heat exchanger is judged to be a shutdown mode, the reason that the difference between the ambient temperature and the temperature of the heat exchanger is not great is caused, the operating modes of the external machine and the internal machine are determined to be different, and the connection error can be determined.
In any of the above technical solutions, preferably, the number of the second detection devices is at least one, and the second detection devices are disposed at any one or a combination of: the heat exchanger outlet, the heat exchanger inlet, or between the heat exchanger outlet and the inlet.
In the technical scheme, the temperature at the outlet of the heat exchanger, the temperature at the inlet of the heat exchanger or the temperature between the outlet and the inlet of the heat exchanger are obtained and detected through the second detection device, the temperature in the heat exchanger is measured when the heat exchanger is used independently or in combination, and the temperature of the heat exchanger can be represented by single use, so that a judgment condition is provided for connection judgment of a control system in the multi-split air-conditioning system; for a plurality of combined uses, the temperature of the heat exchanger is detected for a plurality of times, and the accuracy of the temperature information of the heat exchanger is ensured. Meanwhile, judgment information is provided for judging whether the multi-split system is in a disordered connection state or not, the condition that the multi-split system is in a disordered connection state is avoided, maintenance workers are timely reported and repaired, faults are eliminated, equipment damage caused by the fact that connection errors of the inner unit and the outer unit are not found timely is avoided, and reliability of the multi-split system is improved.
In any of the above technical solutions, preferably, the second detecting device is a temperature sensor; and/or the third detection device is a temperature sensor.
In the technical scheme, the second detection device is a temperature sensor; and/or the third detection device is a temperature sensor, the invention utilizes the temperature relation to judge, the measurement by using the temperature sensor does not need to be limited by excessive environmental factors, the invention is convenient and easy to use, and the temperature sensor is highly integrated nowadays, can be customized according to the user demand, adapts to the product demand better, and avoids the influence on the product appearance due to the overlarge device. The invention also has reliable operation due to the mature, stable and reliable technology in long-term development.
Through the method, whether the connection between the external machine and the internal machine is wrong or not is judged by detecting the working mode of the external machine of the multi-split air-conditioning system, detecting the temperature in the heat exchanger of the internal machine and the indoor environment temperature. Whether the connection between the inner machine and the outer machine is in fault or not is judged in time, and the connection is timely confirmed by a maintenance worker on site, so that equipment damage caused by the fact that the connection error between the inner machine and the outer machine is not found in time is avoided, and the reliability of system operation is improved.
Additional aspects and advantages in accordance with the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flowchart illustrating a method for diagnosing a multi-split system according to an embodiment of the present invention;
fig. 2 illustrates another flowchart of a multi-split system diagnosis method according to an embodiment of the present invention;
fig. 3 shows a further flowchart of a method for diagnosing a multi-split system according to an embodiment of the present invention;
fig. 4 shows a further flowchart of a method for diagnosing a multi-split system according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a multi-split system according to an embodiment of the present invention.
Reference numerals:
wherein, the correspondence between the reference numbers and the names of the components in fig. 5 is:
the system comprises an external machine 200, an internal machine 100, a control device 102, a second detection device 104, a heat exchanger 106, a throttling part 110, a third detection device 112 and a fan 114.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.
A method of providing diagnosis of a multi-split system and a multi-split system according to an embodiment of the present invention will be described with reference to fig. 1 to 5.
Fig. 1 illustrates a schematic block diagram of a multi-split system diagnosis method according to an embodiment of the present invention.
As shown in fig. 1, a multi-split diagnosis method according to an embodiment of the present invention includes:
s102, detecting the operation mode of an outer machine and the temperature in a heat exchanger of the inner machine connected with the outer machine;
s104, detecting the indoor environment temperature of the indoor unit;
and S106, comparing the temperature in the heat exchanger with the ambient temperature according to the running mode of the external unit, and judging whether the connection between the external unit and the internal unit is wrong or not according to the comparison result.
In the multi-online diagnosis method provided by the invention, the operation mode information of the external machine is acquired, and the temperature in the heat exchanger of the internal machine connected with the external machine is detected to be necessary information for judging whether the integral installation connection is correct or not, and the operation modes of different external machines have influence on the temperature in the heat exchanger of the internal machine. The method for judging the connection error of the outdoor unit comprises the steps of measuring the temperature in a heat exchanger of the indoor unit and the indoor environment temperature of the indoor unit, comparing the value of the temperature in the heat exchanger of the indoor unit with the environment temperature or the temperature difference interval, and judging whether the connection of the outdoor unit and the indoor unit in the current mode is error or not according to the comparison result by combining the operation mode of the outdoor unit. By using the method and the device, whether the connection between the external machine and the internal machine in the multi-split system is wrong or not can be judged, the data needing to be collected in the judging process is less, the judging method is simple, the connection error can be quickly and effectively found out, the damage to the multi-split system caused by the installation and connection error is avoided, the reliability of the operation of the whole system is improved, and the resource waste is caused.
In an embodiment of the present invention, preferably, the step of detecting the operation mode of the external unit specifically includes: the method comprises the following steps of determining that the operation mode of the outdoor unit is any one of a shutdown mode, a refrigeration operation mode or a heating operation mode, and detecting the temperature in a heat exchanger of the indoor unit connected with the outdoor unit specifically: and respectively detecting temperature values of at least two positions in the heat exchanger.
In this embodiment, the mode in which the outer unit operates is classified into a shutdown mode, a cooling mode, or a heating mode. By acquiring the specific running mode of the external unit, the method is important for judging whether the external unit and the internal unit have errors or not. The working modes of the external machine are different, the positions for measuring the comparison temperature are different, the comparison scheme is different, the judgment results generated by the obtained comparison results are different, and the working mode of the external machine is the basis for accurately judging the correct connection between the external machine and the internal machine during the definite detection.
The temperature values in the heat exchanger are respectively detected at least twice, namely the temperature values at two different positions, so that effective detection data can be obtained, and the influence of factors such as environment is small. The working mode of the external machine and the accurate temperature value of the heat exchanger are determined, whether the connection matching error of the internal machine and the external machine occurs in the multi-split system is beneficially judged, the judgment error caused by the judged basic data error is avoided, the connection error of the internal machine and the external machine of the multi-split system is avoided, and the running reliability of the system is improved.
Fig. 2 illustrates a method for diagnosing a multi-split system according to an embodiment of the present invention, and as shown in fig. 2, the method for diagnosing a multi-split system includes:
s202, detecting the operation mode of an external machine and the temperature in a heat exchanger of the internal machine connected with the external machine;
s204, detecting the indoor environment temperature of the indoor unit;
s206, detecting that the running mode of the external machine is a shutdown mode;
s208, judging whether the sum of the minimum value of the temperature in the heat exchanger and the first preset temperature is lower than the ambient temperature or not;
s210, determining that the connection between the external machine and the internal machine is wrong when the sum of the minimum value of the temperature in the heat exchanger and the first preset temperature is lower than the ambient temperature;
s212, when the sum of the minimum value of the temperature in the heat exchanger and the first preset temperature is not lower than the ambient temperature, judging whether the difference between the maximum value of the temperature in the heat exchanger and the second preset temperature is higher than the ambient temperature; when the difference between the maximum value of the temperature in the heat exchanger and the second preset temperature is higher than the ambient temperature, determining that the connection between the external machine and the internal machine is wrong;
s214, when the difference between the maximum temperature in the heat exchanger and the second preset temperature is not higher than the ambient temperature, determining that the connection between the external machine and the internal machine is correct;
in this embodiment, after the mode of the external machine is detected to be the shutdown mode, whether the sum of the minimum value of the temperature in the heat exchanger and the first preset temperature is lower than the ambient temperature is judged, and when the judgment result is that the sum of the minimum value of the temperature in the heat exchanger and the first preset temperature is lower than the ambient temperature, that is, the sum of the minimum value of the temperature in the heat exchanger and the first preset temperature is still lower than the ambient temperature, the operation mode of the heat exchanger of the internal machine can be obtained to be the refrigeration mode, so that the minimum temperature of the heat exchanger is far lower than the ambient temperature, and thus, the operation modes of the external machine and the internal machine are determined to be different, and therefore, the connection error can be; when the sum of the minimum value of the temperature in the heat exchanger and the first preset temperature is not lower than the ambient temperature, it can not be determined that the connection is correct at this time, and it is necessary to determine whether the difference between the maximum value of the temperature in the heat exchanger and the second preset temperature is higher than the ambient temperature, when the difference between the maximum value of the temperature in the heat exchanger and the second preset temperature is higher than the ambient temperature, namely the temperature in the heat exchanger is higher than the ambient temperature after subtracting the second preset temperature from the maximum temperature, the operation mode of the heat exchanger of the indoor unit can be obtained as the heating mode, this results in the maximum temperature of the heat exchanger being much higher than the ambient temperature, which makes it possible to determine that the operation modes of the external unit and the internal unit are different, and therefore to determine that there is a connection error, after the heat exchanger is judged not to be in the heating mode and not to be in the cooling mode, the heat exchanger can be determined to be in the shutdown mode. It is conceivable that, in order to ensure accurate detection results, it is preferable to detect the temperature inside the heat exchanger and the ambient temperature at that time after the outdoor unit is stopped for a certain period of time, so as to reduce detection errors. According to the scheme, under the condition that the temperature in the internal machine heat exchanger, the first preset temperature, the second preset temperature and the environment temperature are detected, whether the connection between the internal machine and the external machine of the multi-online system is correct or not can be judged rapidly through comparing the related temperatures, the condition that the connection between the internal machine and the external machine of different online systems is disordered when the multi-online systems are installed is found out, the maintenance worker is timely reported and repaired, the fault is eliminated, and the reliability of the multi-online system is improved.
It is understood that, in this embodiment, the order of the step of determining whether the sum of the minimum value of the temperature inside the heat exchanger and the first preset temperature is lower than the ambient temperature and the step of determining whether the difference between the maximum value of the temperature inside the heat exchanger and the second preset temperature is higher than the ambient temperature may be interchanged, and the effect is that the outdoor unit and the indoor unit can be determined to be connected without error by excluding that the working state of the indoor heat exchanger at this time is not the cooling mode nor the heating mode.
Fig. 3 illustrates a method for diagnosing a multi-split system according to an embodiment of the present invention, where the method for diagnosing a multi-split system, as illustrated in fig. 3, includes:
s302, detecting the operation mode of an external unit and the temperature in a heat exchanger of the internal unit connected with the external unit;
s304, detecting the indoor environment temperature of the indoor unit;
s306, detecting that the running mode of the outdoor unit is a refrigeration mode
S308, judging whether the difference between the maximum value of the temperature in the heat exchanger and the third preset temperature is higher than the ambient temperature or not;
s310, when the difference between the maximum value of the temperature in the heat exchanger and the third preset temperature is higher than the ambient temperature, determining that the connection between the external machine and the internal machine is wrong;
s312, when the difference between the maximum value of the temperature in the heat exchanger and the third preset temperature is not higher than the ambient temperature, judging whether the difference between the temperature in the heat exchanger and the ambient temperature is less than or equal to a fourth preset temperature; and when the difference between the maximum value of the temperature in the heat exchanger and the third preset temperature is higher than the ambient temperature, and the difference between the temperature in the heat exchanger and the ambient temperature is less than or equal to the fourth preset temperature, determining that the connection between the external machine and the internal machine is wrong.
And S314, when the difference between the temperature in the heat exchanger and the ambient temperature is greater than a fourth preset temperature, determining that the connection between the external machine and the internal machine is correct.
In this embodiment, when it is detected that the outdoor unit mode is the cooling mode, it is determined whether a difference between a maximum value of the temperature in the heat exchanger and a third preset temperature is lower than the ambient temperature, and it is determined that when the difference between the maximum value of the temperature in the heat exchanger and the third preset temperature is lower than the ambient temperature, that is, the difference between the maximum value of the temperature in the heat exchanger and the third preset temperature is still lower than the ambient temperature, it is determined that the operating mode of the heat exchanger of the indoor unit is the heating mode, which results in the ambient temperature being much higher than the temperature of the heat exchanger, so that it can be determined that the operating modes of the outdoor unit and the indoor unit are different, and therefore it can be determined that there; judging whether the difference between the temperature in the heat exchanger and the ambient temperature is smaller than or equal to a fourth preset temperature, namely subtracting the temperature in the heat exchanger from the ambient temperature to be smaller than the fourth preset temperature, namely the ambient temperature is not influenced by the temperature change of the heat exchanger, if the working mode of the indoor unit heat exchanger is a heating mode, the difference between the temperature in the indoor unit heat exchanger and the ambient temperature is larger than the fourth preset value, and if the working mode of the indoor unit heat exchanger is a cooling mode, subtracting the fourth preset temperature from the ambient temperature to be larger than the temperature of the indoor unit heat exchanger, so that the working mode of the indoor unit heat exchanger is a shutdown mode, the difference between the ambient temperature and the temperature of the indoor unit heat exchanger is caused to be in a smaller interval, and thus the running modes of the outdoor unit and the indoor unit are different, and the connection error.
It is understood that, in this embodiment, the sequence of the step of interrupting whether the difference between the maximum value of the temperature inside the heat exchanger and the third preset temperature is higher than the ambient temperature and the step of determining whether the difference between the temperature inside the heat exchanger and the ambient temperature is less than or equal to the fourth preset temperature may be interchanged, and the effect is that the outdoor unit and the indoor unit can be determined to be connected without error by excluding that the working state of the indoor heat exchanger at this time is not the heating mode nor the shutdown mode.
Fig. 4 illustrates a method for diagnosing a multi-split system according to an embodiment of the present invention, where the method for diagnosing a multi-split system, as illustrated in fig. 4, includes:
s402, detecting the operation mode of an external machine and the temperature in a heat exchanger of the internal machine connected with the external machine;
s404, detecting the indoor environment temperature of the indoor unit;
s406, detecting that the running mode of the external unit is a heating mode
S408, judging whether the sum of the minimum value of the temperature in the heat exchanger and the fifth preset temperature is lower than the ambient temperature or not;
s410, determining that the connection between the external machine and the internal machine is wrong when the sum of the minimum value of the temperature in the heat exchanger and the fifth preset temperature is lower than the ambient temperature;
s412, when the sum of the minimum value of the temperature in the heat exchanger and the fifth preset temperature is not lower than the ambient temperature, judging whether the difference between the temperature in the heat exchanger and the ambient temperature is less than or equal to a sixth preset temperature; and when the difference between the temperature in the heat exchanger and the ambient temperature is less than or equal to a sixth preset temperature, determining that the connection between the external machine and the internal machine is wrong.
And S414, when the difference between the temperature in the heat exchanger and the ambient temperature is greater than the sixth preset temperature, determining that the connection between the external machine and the internal machine is correct.
In this embodiment, when it is detected that the outdoor unit mode is the heating mode, it is determined whether the sum of the minimum value of the temperature in the heat exchanger and the fifth preset temperature is lower than the ambient temperature, that is, the sum of the minimum value of the temperature in the heat exchanger plus the fifth preset temperature is lower than the ambient temperature, and then the operating mode of the indoor unit is the cooling mode, which causes the temperature in the heat exchanger to be much lower than the ambient temperature, so that it can be determined that the operating modes of the outdoor unit and the indoor unit are different, and therefore it can be determined that there is a connection error; and judging whether the difference between the temperature in the heat exchanger and the ambient temperature is less than or equal to a sixth preset temperature, namely the ambient temperature is not influenced by the temperature of the heat exchanger, if the working mode of the heat exchanger is a heating mode or a cooling mode, the absolute difference between the temperature in the heat exchanger and the ambient temperature is greater than the sixth preset temperature, and the absolute difference is not greater than the sixth preset temperature, so that the working mode of the heat exchanger is judged to be a shutdown mode, the reason that the difference between the ambient temperature and the temperature of the heat exchanger is not great is caused, the operating modes of the external machine and the internal machine are determined to be different, and the connection error can be determined.
It is understood that, in this embodiment, the order of the step of determining whether the sum of the minimum value and the fifth preset temperature of the temperature inside the heat exchanger is lower than the ambient temperature and the step of determining whether the difference between the maximum value and the second preset temperature of the temperature inside the heat exchanger is higher than the ambient temperature may be interchanged, and the effect is that the outdoor unit and the indoor unit can be determined to be connected without error by excluding that the working state of the indoor heat exchanger at this time is not the cooling mode nor the shutdown mode.
In one embodiment of the present invention, preferably, the temperature inside the heat exchanger is detected as any one or a combination of the following: and detecting the temperature at the outlet of the heat exchanger, the temperature at the inlet of the heat exchanger or the temperature between the outlet and the inlet of the heat exchanger.
In the embodiment, the temperature in the heat exchanger is measured by acquiring and detecting the temperature at the outlet of the heat exchanger, the temperature at the inlet of the heat exchanger or the temperature between the outlet and the inlet of the heat exchanger, and the temperature in the heat exchanger is measured by independent use or combined use, so that the temperature of the heat exchanger can be represented by single use, and a judgment condition is provided for the connection judgment of the multi-split system; for a plurality of combined uses, the temperature of the heat exchanger is detected for a plurality of times, and the accuracy of the temperature information of the heat exchanger is ensured. Meanwhile, judgment information is provided for judging whether the multi-split system is in a disordered connection state or not, the condition that the multi-split system is in a disordered connection state is avoided, maintenance workers are timely reported and repaired, faults are eliminated, equipment damage caused by the fact that connection errors of the inner unit and the outer unit are not found timely is avoided, and reliability of the multi-split system is improved.
As shown in fig. 5, according to a second aspect of the present invention, there is provided a multi-split system, including: the first detection device is arranged on the outer unit 200 and used for detecting the operation mode of the outer unit 200; the second detection device 104 is arranged on the indoor unit 100 connected with the outdoor unit 200 and used for detecting the temperature in the heat exchanger 106 of the indoor unit 100; a third detection device 112, provided in the room in which the indoor unit 100 is located, for detecting an ambient temperature in the room in which the indoor unit 100 is located; and the control device 102 is configured to compare the temperature inside the heat exchanger 106 with the ambient temperature according to the operation mode of the outdoor unit 200, and determine whether the connection between the outdoor unit 200 and the indoor unit 100 is incorrect according to the comparison result.
In this embodiment, the first detection device obtains the operation mode information of the external unit 200 and detects the temperature inside the heat exchanger 106 of the internal unit 100 connected to the external unit 200, which is necessary information for determining whether the entire installation connection is correct, and the operation modes of different external units 200 have an influence on the temperature inside the heat exchanger 106 of the internal unit 100. The method for determining the connection error of the outdoor unit 200 and the indoor unit 100 in the current mode comprises the steps of determining the temperature in the heat exchanger 106 and the indoor environment temperature of the indoor unit 100 through the second detection device 104 and the third detection device 112, comparing the numerical value or the temperature difference interval between the temperature in the heat exchanger 106 and the environment temperature through the control device 102, and determining whether the connection error of the outdoor unit 200 and the indoor unit 100 in the current mode exists according to the comparison result through combining the operation mode of the outdoor unit 200. According to the method and the device, whether the connection between the outdoor unit 200 and the indoor unit 100 in the multi-split system is wrong can be judged, the data needing to be collected is few in the judging process, the judging method is simple, the connection error can be found out quickly and effectively, the damage to the multi-split system due to the installation and connection error is avoided, the reliability of the operation of the whole system is improved, and the waste of resources is caused.
In an embodiment of the present invention, preferably, the first detecting device is specifically configured to: determining that the operation mode of the outdoor unit 200 is any one of a shutdown mode, a cooling operation mode or a heating operation mode; the second detection device 104 is specifically configured to: the steps of detecting the temperature in the heat exchanger 106 of the indoor unit 100 connected to the outdoor unit 200 are specifically as follows: at least two temperature values in the heat exchanger 106 are detected respectively.
In this embodiment, the mode in which the outer unit 200 is determined to be operated by the first detection means is classified into any one of a shutdown mode, a cooling mode, or a heating mode. By acquiring the specific mode of operation of the outdoor unit 200, it is important to determine whether an error occurs between the outdoor unit 200 and the indoor unit 100. The working modes of the outdoor unit 200 are different, the positions for measuring the comparison temperature are different in the invention, the comparison schemes are different, the judgment results generated by the obtained comparison results are also different, and the working mode of the outdoor unit 200 is the basis for correctly judging the correct connection between the outdoor unit 200 and the indoor unit 100 during the definite detection.
The second detection device 104 is used for respectively detecting the temperature values in the heat exchanger 106 at least twice, namely the temperature values at two different positions, so that effective detection data can be obtained, and the influence of factors such as environment is small. The working mode of the outdoor unit 200 and the accurate temperature value of the heat exchanger 106 are determined, whether the connection matching error of the indoor unit 100 and the outdoor unit 200 occurs in the multi-split system is beneficially judged, the judgment error caused by the judged basic data error is avoided, the connection error of the indoor unit 100 and the outdoor unit 200 in the multi-split system is avoided, and the reliability of system operation is improved.
In an embodiment of the present invention, preferably, the control device 102 is specifically configured to: after the first detection device detects that the operation mode of the external unit 200 is the shutdown mode, whether the sum of the minimum value of the temperature in the heat exchanger 106 and the first preset temperature is lower than the ambient temperature is judged; when the sum of the minimum value of the temperature in the heat exchanger 106 and the first preset temperature is lower than the ambient temperature, it is determined that the connection between the external unit 200 and the internal unit 100 is wrong; and/or determining whether the difference between the maximum value of the temperature in the heat exchanger 106 and the second preset temperature is higher than the ambient temperature; when the difference between the maximum value of the temperature in the heat exchanger 106 and the second preset temperature is lower than the ambient temperature, it is determined that the connection between the outdoor unit 200 and the indoor unit 100 is incorrect.
In this embodiment, after the first detection device detects that the mode of the external unit 200 is the shutdown mode, the control device 102 determines whether the sum of the minimum value of the temperature in the heat exchanger 106 and the first preset temperature is lower than the ambient temperature, and when the determination result is that the sum of the minimum value of the temperature in the heat exchanger 106 and the first preset temperature is lower than the ambient temperature, that is, the sum of the minimum value of the temperature in the heat exchanger 106 and the first preset temperature is still lower than the ambient temperature, it can be obtained that the operation mode of the heat exchanger 106 of the internal unit 100 is the cooling mode, so that the minimum temperature of the heat exchanger 106 is far lower than the ambient temperature, and thus it can be determined that the operation modes of the external unit 200 and the internal unit 100 are different, and therefore it can be determined that; when the sum of the minimum value of the temperature in the heat exchanger 106 and the first preset temperature is not lower than the environment temperature, the connection is not correct at this time, and it is further required to continuously determine whether the difference between the maximum value of the temperature in the heat exchanger 106 and the second preset temperature is higher than the environment temperature, when the difference between the maximum value of the temperature in the heat exchanger 106 and the second preset temperature is higher than the environment temperature, that is, the difference between the maximum value of the temperature in the heat exchanger 106 and the second preset temperature is higher than the environment temperature after subtracting the second preset temperature, the operation mode of the heat exchanger 106 of the indoor unit 100 is the heating mode, so that the maximum temperature of the heat exchanger 106 is far higher than the environment temperature, and thus it can be determined that the operation modes of the outdoor unit 200 and the indoor unit 100 are different, so that the connection is incorrect, and after it is determined that the heat exchanger 106 is not in the heating mode and is not in, the heat exchanger 106 can be determined to be in the shutdown mode. It is conceivable that, in order to ensure accurate detection results, it is preferable to detect the temperature inside the heat exchanger 106 and the ambient temperature at that time after the outdoor unit 200 is stopped for a certain period of time, so as to reduce detection errors. Under the shutdown mode, under the condition that the temperature in the heat exchanger 106 of the indoor unit 100, the first preset temperature, the second preset temperature and the environment temperature are detected, whether the connection between the indoor unit 100 and the outdoor unit 200 of the multi-online system is correct or not can be quickly judged by comparing the related temperatures, the condition that the connection between the indoor units 100 and the outdoor units 200 of different online systems is disordered when the multi-online systems are installed is found out, the maintenance worker is timely reported and repaired, the fault is eliminated, and the reliability of the multi-online system is improved.
In an embodiment of the present invention, preferably, the control device 102 is specifically configured to: after the first detection device detects that the operation mode of the external unit 200 is the cooling mode, whether the difference between the maximum value of the temperature in the heat exchanger 106 and the third preset temperature is lower than the ambient temperature is judged; when the difference between the maximum value of the temperature in the heat exchanger 106 and the third preset temperature is higher than the ambient temperature, it is determined that the connection between the outdoor unit 200 and the indoor unit 100 is incorrect; and/or judging whether the difference between the temperature in the heat exchanger 106 and the ambient temperature is less than or equal to a fourth preset temperature; when the difference between the temperature in the heat exchanger 106 and the ambient temperature is less than or equal to the fourth preset temperature, it is determined that the connection between the outdoor unit 200 and the indoor unit 100 is incorrect.
In this embodiment, when the first detection device detects that the mode of the outdoor unit 200 is the cooling mode, the control device 102 determines whether a difference between a maximum value of the temperature inside the heat exchanger 106 and a third preset temperature is higher than the ambient temperature, and determines that when the difference between the maximum value of the temperature inside the heat exchanger 106 and the third preset temperature is higher than the ambient temperature, that is, the difference between the maximum value of the temperature inside the heat exchanger 106 and the third preset temperature is still higher than the ambient temperature, it can be determined that the working mode of the heat exchanger 106 of the indoor unit 100 is the heating mode at this moment, which causes the temperature inside the heat exchanger 106 to be much higher than the ambient temperature, so that it can be determined that the operating modes of the outdoor unit 200 and the indoor unit 100 are different, and therefore it can be determined that there is a connection; judging whether the difference between the temperature in the heat exchanger 106 and the ambient temperature is less than or equal to a fourth preset temperature, namely subtracting the temperature in the heat exchanger 106 from the ambient temperature to be less than the fourth preset temperature, namely the ambient temperature is not influenced by the temperature change of the heat exchanger 106, if the working mode of the heat exchanger 106 of the indoor unit 100 is a heating mode, the difference between the temperature in the heat exchanger 106 of the indoor unit 100 and the ambient temperature is greater than the fourth preset value, if the working mode of the heat exchanger 106 of the indoor unit 100 is a cooling mode, subtracting the fourth preset temperature from the ambient temperature to be greater than the temperature of the heat exchanger 106 of the indoor unit 100, so that the working mode of the heat exchanger 106 of the indoor unit 100 is a shutdown mode, the difference between the ambient temperature and the temperature of the heat exchanger 106 of the indoor unit 100 is in a small range, and thus the running modes of the outdoor unit 200 and the, the situation that the connection between the indoor unit 100 and the outdoor unit 200 of different on-line units is disordered when a plurality of on-line systems are installed is found out, the maintenance workers are timely reported and repaired, the faults are eliminated, and the reliability of the on-line system is improved.
In an embodiment of the present invention, preferably, the control device 102 is specifically configured to: after the first detection device detects that the operation mode of the outdoor unit 200 is the heating mode, whether the sum of the minimum value of the temperature in the heat exchanger 106 and the fifth preset temperature is lower than the ambient temperature is judged; when the sum of the minimum value of the temperature in the heat exchanger 106 and the fifth preset temperature is lower than the ambient temperature, it is determined that the connection between the outdoor unit 200 and the indoor unit 100 is incorrect; and/or judging whether the difference between the temperature in the heat exchanger 106 and the ambient temperature is less than or equal to a sixth preset temperature; when the difference between the temperature in the heat exchanger 106 and the ambient temperature is less than or equal to the sixth preset temperature, it is determined that the connection between the outdoor unit 200 and the indoor unit 100 is incorrect.
In this embodiment, when the first detection device detects that the mode of the external unit 200 is the heating mode, the control device 102 determines whether the sum of the minimum value of the temperature in the heat exchanger 106 and the fifth preset temperature is lower than the ambient temperature, that is, the sum of the minimum value of the temperature in the heat exchanger 106 and the fifth preset temperature is lower than the ambient temperature, then the working mode of the internal unit 100 is the cooling mode, which causes the temperature in the heat exchanger 106 to be much lower than the ambient temperature, so that it can be determined that the operation modes of the external unit 200 and the internal unit 100 are different, and therefore it can be determined that there is a connection error; judging whether the difference between the temperature in the heat exchanger 106 and the ambient temperature is less than or equal to a sixth preset temperature, namely the ambient temperature is not affected by the temperature of the heat exchanger 106, if the working mode of the heat exchanger 106 is a heating mode or a cooling mode, the absolute difference between the temperature in the heat exchanger 106 and the ambient temperature is greater than the sixth preset temperature, and at the moment, the absolute difference is not greater than the sixth preset temperature, so that the reason that the working mode of the heat exchanger 106 is a shutdown mode at the moment can be judged, the difference between the ambient temperature and the temperature of the heat exchanger 106 is not great, the fact that the running modes of the outdoor unit 200 and the indoor unit 100 are different can be determined, and therefore the connection error can be determined.
In one embodiment of the present invention, preferably, the number of the second detection devices 104 is at least one, and the second detection devices 104 are disposed at any one or a combination of the following: at the outlet of heat exchanger 106, at the inlet of heat exchanger 106, or between the outlet and inlet of heat exchanger 106.
In this embodiment, the number of the second detecting devices 104 is at least one, and as the number of the detecting devices is increased, the detected data is more real and reliable, thereby avoiding the influence of the sensor abnormality on the detection result and the final judgment result. The second detection device 104 is installed at the outlet of the heat exchanger 106, at the inlet of the heat exchanger 106 or between the outlet and the inlet of the heat exchanger 106, the installation position of the second detection device 104 determines that the detected data represents different main action effects, the installation position environments are different, the detected data fluctuation ranges are different, and the comparison result in the judgment process of the invention is different in selected value range. By selecting any one or a combination of at least one second detection device 104 and the second detection devices 104 in different environmental positions, the real reliability of the detected data can be ensured, the data plays a decisive role in judging whether the connection between the multi-online system indoor unit 100 and the outdoor unit 200 is abnormal, the real and reliable data can avoid giving wrong judgment in the process of judging the connection error between the multi-online system indoor unit 100 and the outdoor unit 200, and the reliability of the system is improved.
In one embodiment of the present invention, the second detecting device 104 is preferably a temperature sensor; and/or the third sensing device 112 is a temperature sensor.
In this embodiment, the second detection device 104 is a temperature sensor; and/or the third detection device 112 is a temperature sensor, the invention utilizes the temperature relationship to judge, the measurement by using the temperature sensor does not need too much environmental factor limitation, the invention is convenient and easy to use, and the temperature sensor is highly integrated nowadays, can be customized according to the user requirement, adapts to the product requirement better, and avoids the influence on the product appearance due to the overlarge device.
In an embodiment of the present invention, a multi-split air conditioner system includes an outer unit 200 and a plurality of inner units 100, and refrigerant connection pipes of the plurality of inner units 100 may not all be connected to the outer unit 200, so it is necessary to determine whether the connection between the inner units 100 and the outer diameter is incorrect, the plurality of inner units 100 correspondingly have a plurality of control devices 102 and a plurality of throttling components 110, a fan 114 is further disposed on a heat exchanger 106 of each inner unit 100, a third detection device 112 is disposed in a chamber where the inner units 100 are installed, and the number of the second detection devices 104 can be set to two, so as to facilitate detection of the temperature of the heat exchanger 106.
In the description of the present specification, the terms "upper", "lower", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. A method for diagnosing a multi-split air-conditioning system, which is used for the multi-split air-conditioning system, and comprises a plurality of external machines and a plurality of internal machines, and is characterized in that the method for diagnosing the multi-split air-conditioning system comprises the following steps:
detecting the operation mode of an outer machine and the temperature in a heat exchanger of an inner machine connected with the outer machine;
detecting the indoor environment temperature of the indoor unit;
comparing the temperature in the heat exchanger with the ambient temperature according to the running mode of the external unit, and judging whether the connection between the external unit and the internal unit is wrong or not according to the comparison result;
the step of detecting the operation mode of the outdoor unit specifically comprises the following steps: determining that the operation mode of the outdoor unit is any one of a shutdown mode, a refrigeration operation mode or a heating operation mode;
the method comprises the following steps of detecting the temperature in a heat exchanger of an inner machine connected with the outer machine: respectively detecting temperature values of at least two positions in the heat exchanger;
the step of comparing the temperature in the heat exchanger with the ambient temperature according to the running mode of the external unit, and judging whether the connection between the external unit and the internal unit is incorrect according to the comparison result specifically comprises the following steps: detecting that the running mode of the external unit is a shutdown mode; judging whether the sum of the minimum value of the temperature in the heat exchanger and a first preset temperature is lower than the ambient temperature or not; when the sum of the minimum value of the temperature in the heat exchanger and a first preset temperature is lower than the environment temperature, determining that the connection between the external machine and the internal machine is wrong; and/or judging whether the difference between the maximum value of the temperature in the heat exchanger and a second preset temperature is higher than the ambient temperature; and when the difference between the maximum value of the temperature in the heat exchanger and the second preset temperature is lower than the environmental temperature, determining that the connection between the external machine and the internal machine is wrong.
2. The method for diagnosing a multi-split air system according to claim 1, wherein the step of comparing the temperature inside the heat exchanger with the ambient temperature according to the operation mode of the external unit, and the step of determining whether the external unit and the internal unit are connected with errors according to the comparison result specifically comprises:
detecting that the running mode of the outdoor unit is a refrigeration mode;
judging whether the difference between the maximum value of the temperature in the heat exchanger and a third preset temperature is higher than the ambient temperature or not;
when the difference between the maximum value of the temperature in the heat exchanger and the third preset temperature is higher than the environmental temperature, determining that the connection between the external machine and the internal machine is wrong; and/or
Judging whether the difference between the temperature in the heat exchanger and the ambient temperature is less than or equal to a fourth preset temperature or not;
and when the difference between the temperature in the heat exchanger and the ambient temperature is less than or equal to a fourth preset temperature, determining that the connection between the external machine and the internal machine is wrong.
3. The method for diagnosing a multi-split air system according to claim 1, wherein the step of comparing the temperature inside the heat exchanger with the ambient temperature according to the operation mode of the external unit, and the step of determining whether the external unit and the internal unit are connected with errors according to the comparison result specifically comprises:
detecting that the operation mode of the outdoor unit is a heating mode;
judging whether the sum of the minimum value of the temperature in the heat exchanger and a fifth preset temperature is lower than the ambient temperature or not;
when the sum of the minimum value of the temperature in the heat exchanger and a fifth preset temperature is lower than the environmental temperature, determining that the connection between the external machine and the internal machine is wrong; and/or
Judging whether the difference between the temperature in the heat exchanger and the ambient temperature is less than or equal to a sixth preset temperature or not;
and when the difference between the temperature in the heat exchanger and the ambient temperature is less than or equal to a sixth preset temperature, determining that the connection between the external machine and the internal machine is wrong.
4. A method for diagnosis of a multi-split system as set forth in any one of claims 1 to 3,
detecting the temperature in the heat exchanger as any one or combination of the following:
and detecting the temperature at the outlet of the heat exchanger, the temperature at the inlet of the heat exchanger or the temperature between the outlet and the inlet of the heat exchanger.
5. The utility model provides a many online systems, many online systems include a plurality of outer machines and a plurality of interior machines, its characterized in that many online systems include:
the first detection device is arranged on the outer machine and used for detecting the operation mode of the outer machine;
the second detection device is arranged on an inner machine connected with the outer machine and used for detecting the temperature in a heat exchanger of the inner machine;
the third detection device is arranged in the room where the internal machine is positioned and used for detecting the indoor environment temperature where the internal machine is positioned;
the control device is used for comparing the temperature in the heat exchanger with the ambient temperature according to the running mode of the external machine and judging whether the connection between the external machine and the internal machine is wrong or not according to the comparison result;
the first detection device is specifically configured to: determining that the operation mode of the outdoor unit is any one of a shutdown mode, a refrigeration operation mode or a heating operation mode;
the second detection device is specifically configured to: the method comprises the following steps of detecting the temperature in a heat exchanger of an inner machine connected with the outer machine: respectively detecting temperature values of at least two positions in the heat exchanger;
the control device is specifically configured to: after the first detection device detects that the operation mode of the external unit is a shutdown mode, judging whether the sum of the minimum value of the temperature in the heat exchanger and a first preset temperature is lower than the environmental temperature;
when the sum of the minimum value of the temperature in the heat exchanger and a first preset temperature is lower than the environment temperature, determining that the connection between the external machine and the internal machine is wrong; and/or
Judging whether the difference between the maximum value of the temperature in the heat exchanger and a second preset temperature is higher than the ambient temperature or not;
and when the difference between the maximum value of the temperature in the heat exchanger and the second preset temperature is lower than the environmental temperature, determining that the connection between the external machine and the internal machine is wrong.
6. A multi-split system as defined in claim 5,
the control device is specifically configured to: after the first detection device detects that the operation mode of the outdoor unit is a refrigeration mode, judging whether the difference between the maximum value of the temperature in the heat exchanger and a third preset temperature is higher than the ambient temperature;
when the difference between the maximum value of the temperature in the heat exchanger and a third preset temperature is higher than the environmental temperature, determining that the connection between the external machine and the internal machine is wrong; and/or
Judging whether the difference between the temperature in the heat exchanger and the ambient temperature is less than or equal to a fourth preset temperature or not;
and when the difference between the temperature in the heat exchanger and the ambient temperature is less than or equal to a fourth preset temperature, determining that the connection between the external machine and the internal machine is wrong.
7. A multi-split system as defined in claim 5,
the control device is specifically configured to: after the first detection device detects that the operation mode of the outdoor unit is a heating mode, judging whether the sum of the minimum value of the temperature in the heat exchanger and a fifth preset temperature is lower than the environmental temperature or not;
when the sum of the minimum value of the temperature in the heat exchanger and a fifth preset temperature is lower than the environmental temperature, determining that the connection between the external machine and the internal machine is wrong; and/or
Judging whether the difference between the temperature in the heat exchanger and the ambient temperature is less than or equal to a sixth preset temperature or not;
and when the difference between the temperature in the heat exchanger and the ambient temperature is less than or equal to a sixth preset temperature, determining that the connection between the external machine and the internal machine is wrong.
8. A multi-split system as claimed in any one of claims 5 to 7,
the number of the second detection devices is at least one, and the second detection devices are arranged at any one or a combination of the following positions: the heat exchanger outlet, the heat exchanger inlet, or between the heat exchanger outlet and the inlet.
9. A multi-split system as claimed in any one of claims 5 to 7,
the second detection device is a temperature sensor; and/or the third detection device is a temperature sensor.
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CN109163429A (en) * 2018-08-22 2019-01-08 广东美的暖通设备有限公司 Multi-line system and its mode control method, device and storage medium
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CN110017580B (en) * 2019-04-17 2021-05-14 宁波奥克斯电气股份有限公司 Fan coil and cold and heat source equipment mode interlocking control method and device and air conditioner
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