CN117928046A - Multi-split engineering debugging fault detection method - Google Patents
Multi-split engineering debugging fault detection method Download PDFInfo
- Publication number
- CN117928046A CN117928046A CN202410111620.6A CN202410111620A CN117928046A CN 117928046 A CN117928046 A CN 117928046A CN 202410111620 A CN202410111620 A CN 202410111620A CN 117928046 A CN117928046 A CN 117928046A
- Authority
- CN
- China
- Prior art keywords
- temperature
- inlet pipe
- pipe temperature
- real
- time
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000005057 refrigeration Methods 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims description 11
- 238000004378 air conditioning Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 abstract description 20
- 239000003507 refrigerant Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 7
- 230000007613 environmental effect Effects 0.000 description 7
- 239000003570 air Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000003745 diagnosis Methods 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Abstract
The invention discloses a multi-split engineering debugging fault detection method. The method comprises the following steps: acquiring initial inlet pipe temperatures on inlet pipes of a plurality of indoor units; triggering a plurality of outdoor units and a plurality of indoor units to respectively operate in the same refrigeration mode and heating mode so as to acquire at least one of the maximum real-time inlet pipe temperature and the minimum real-time inlet pipe temperature of the indoor units in different modes; comparing the minimum real-time inlet pipe temperature obtained in the refrigeration mode, the maximum real-time inlet pipe temperature obtained in the heating mode and the initial inlet pipe temperature, and judging whether the outdoor unit and the indoor unit are connected correctly or not according to the comparison result. The real-time inlet pipe temperature obtained in the refrigerating mode and the heating mode is compared with the initial inlet pipe temperature, so that compared with the prior art, the influence of the external environment on the detection result can be reduced to the greatest extent, whether the outdoor unit is connected to the indoor unit in a communication manner can be accurately judged, and the accuracy of the detection result is effectively improved.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a multi-split engineering debugging fault detection method.
Background
The multi-connected air conditioner is an air conditioning system in which one outdoor unit or a plurality of outdoor units are connected in parallel, and the communication mode of the multi-connected air conditioner requires that the indoor units are correspondingly connected with the corresponding outdoor units through communication lines (or wireless communication signals).
In actual engineering installation, the outdoor units under the same engineering are usually installed in a region, and because the multiple outdoor units are more, and the indoor unit installation place is far away from the outdoor units, the engineering wiring is complex, and the outdoor units and the indoor units may be in communication missed connection, short circuit or connected in series with the indoor units under other engineering, so that the corresponding indoor units cannot normally operate.
In view of the above problems, in the prior art, application number 201711042150.9 provides a method for diagnosing a multi-split system and the multi-split system, which firstly detects the temperature in a heat exchanger of an inner machine correspondingly connected with an outer machine, then detects the indoor environment temperature of the inner machine, then compares the temperature in the heat exchanger with the environment temperature according to the operation mode of the outer machine, and finally judges whether the outer machine is connected with the inner machine by mistake according to the comparison result, thereby judging whether the connection between the inner machine and the outer machine of the multi-split system is correct. However, the above diagnosis results are susceptible to environmental influences, resulting in inaccurate judging of the cooling mode in a low-temperature environment and inaccurate judging of the heating mode in a high-temperature environment, thereby resulting in poor accuracy of the judgment results.
Based on the foregoing, there is a need for a multi-split engineering debugging fault detection method to solve the technical problems in the prior art.
Disclosure of Invention
The invention aims to provide a multi-split engineering debugging fault detection method which can reduce the influence of the environment on a detection result, thereby improving the accuracy of the fault detection result.
To achieve the purpose, the invention adopts the following technical scheme:
The utility model provides a many online engineering debugging fault detection method for many online air conditioning system, many online air conditioning system includes a plurality of off-premises stations and a plurality of indoor set, the method includes:
Acquiring initial inlet pipe temperatures on the inlet pipes of a plurality of indoor units;
triggering a plurality of outdoor units and a plurality of indoor units to respectively operate in the same refrigeration mode and heating mode so as to acquire at least one of the maximum real-time inlet pipe temperature and the minimum real-time inlet pipe temperature of the indoor units in different modes;
comparing the minimum real-time inlet pipe temperature obtained in the refrigerating mode, the maximum real-time inlet pipe temperature obtained in the heating mode and the initial inlet pipe temperature, and judging whether the outdoor unit and the indoor unit are connected correctly or not according to a comparison result.
Optionally, triggering the plurality of outdoor units and the plurality of indoor units to operate in the same refrigeration mode and heating mode respectively, so as to obtain at least one of the maximum real-time inlet pipe temperature and the minimum real-time inlet pipe temperature of the indoor units in different modes, including:
Triggering a plurality of outdoor units and a plurality of indoor units to run in the same refrigeration mode, stopping a fan of the indoor units, and arranging an inlet pipe temperature sensing bulb and an outlet pipe temperature sensing bulb on an evaporator of the indoor units to obtain a first maximum real-time inlet pipe temperature and a first minimum real-time inlet pipe temperature;
And triggering a plurality of outdoor units and a plurality of indoor units to run in the same heating mode, and stopping a fan of the indoor units so as to obtain a second maximum real-time inlet pipe temperature and a second minimum real-time inlet pipe temperature through the inlet pipe temperature sensing bag and the outlet pipe temperature sensing bag respectively.
Optionally, comparing the minimum real-time inlet pipe temperature obtained in the cooling mode and the maximum real-time inlet pipe temperature obtained in the heating mode with the initial inlet pipe temperature, and determining whether the outdoor unit and the indoor unit are connected correctly according to a comparison result, including:
And judging whether the absolute value of the difference between the first minimum real-time inlet pipe temperature and the initial inlet pipe temperature is smaller than a first preset temperature value, judging whether the absolute value of the difference between the second maximum real-time inlet pipe temperature and the initial inlet pipe temperature is smaller than a second preset temperature value, and if yes, judging that the outdoor unit and the corresponding indoor unit have connection faults.
Optionally, if the absolute value of the difference between the first minimum real-time inlet pipe temperature and the initial inlet pipe temperature is smaller than a first preset temperature value, and the absolute value of the difference between the second maximum real-time inlet pipe temperature and the initial inlet pipe temperature is smaller than a second preset temperature value, before determining that a connection fault exists between the outdoor unit and the corresponding indoor unit, the method further includes:
judging whether the absolute value of the difference value of the first maximum real-time pipe inlet temperature and the first minimum real-time pipe inlet temperature is smaller than a third preset temperature value and/or whether the absolute value of the difference value of the second maximum real-time pipe inlet temperature and the second minimum real-time pipe inlet temperature is smaller than a fourth preset temperature value,
If yes, judging that the outdoor unit and the corresponding indoor unit have connection faults;
If not, the connection between the outdoor unit and the corresponding indoor unit is judged to be correct.
Optionally, determining whether the absolute value of the difference between the first minimum real-time inlet pipe temperature and the initial inlet pipe temperature is smaller than a first preset temperature value, and determining whether the absolute value of the difference between the second maximum real-time inlet pipe temperature and the initial inlet pipe temperature is smaller than a second preset temperature value, if not, including:
if the absolute value of the difference between the first minimum real-time inlet pipe temperature and the initial inlet pipe temperature is smaller than the first preset temperature value, the absolute value of the difference between the second maximum real-time inlet pipe temperature and the initial inlet pipe temperature is not smaller than the second preset temperature value;
Or if the absolute value of the difference between the first minimum real-time inlet pipe temperature and the initial inlet pipe temperature is not smaller than the first preset temperature value, the absolute value of the difference between the second maximum real-time inlet pipe temperature and the initial inlet pipe temperature is smaller than the second preset temperature value, and the connection between the outdoor unit and the corresponding indoor unit is judged to be correct.
Optionally, the indoor unit is further provided with an environmental temperature sensing bulb, and after acquiring the initial inlet tube temperatures on the liquid inlet tubes of the indoor units, the indoor unit further comprises acquiring the environmental temperature through the environmental temperature sensing bulb;
If the difference between the first minimum real-time inlet pipe temperature and the initial inlet pipe temperature is smaller than the first preset temperature value, the difference between the second maximum real-time inlet pipe temperature and the initial inlet pipe temperature is not smaller than the second preset temperature value, and before the fact that the outdoor unit is correctly connected with the corresponding indoor unit is judged, the method further comprises the following steps:
Judging whether the absolute value of the difference between the second maximum real-time inlet pipe temperature and the second minimum real-time inlet pipe temperature is not less than a fourth preset temperature value or not and whether the absolute value of the difference between the second maximum real-time inlet pipe temperature and the environment temperature is not less than the fourth preset temperature value or not,
If yes, judging that the outdoor unit is connected with the corresponding indoor unit correctly;
If not, judging that the outdoor unit and the corresponding indoor unit have connection faults, or judging that the outdoor unit and the corresponding indoor unit are connected correctly, and the inlet pipe temperature sensing bulb and the outlet pipe temperature sensing bulb are positioned on the same side of the evaporator.
Optionally, if the difference between the first minimum real-time inlet pipe temperature and the initial inlet pipe temperature is smaller than the first preset temperature value, the difference between the second maximum real-time inlet pipe temperature and the initial inlet pipe temperature is not smaller than the second preset temperature value, and before determining that the connection between the outdoor unit and the corresponding indoor unit is correct, the method further includes:
Judging whether the absolute value of the difference between the first maximum real-time inlet pipe temperature and the first minimum real-time inlet pipe temperature is not less than a third preset temperature value or not and whether the absolute value of the difference between the first maximum real-time inlet pipe temperature and the environment temperature is not less than the third preset temperature value or not,
If yes, judging that the outdoor unit is connected with the corresponding indoor unit correctly;
If not, judging that the outdoor unit and the corresponding indoor unit have connection faults, or judging that the outdoor unit and the corresponding indoor unit are connected correctly, and the inlet pipe temperature sensing bulb and the outlet pipe temperature sensing bulb are positioned on the same side of the evaporator.
Optionally, determining whether the absolute value of the difference between the first minimum real-time inlet pipe temperature and the initial inlet pipe temperature is smaller than a first preset temperature value, and determining whether the absolute value of the difference between the second maximum real-time inlet pipe temperature and the initial inlet pipe temperature is smaller than a second preset temperature value, if not, including:
And if the difference value between the first minimum real-time inlet pipe temperature and the initial inlet pipe temperature is not smaller than the first preset temperature value, and the difference value between the second maximum real-time inlet pipe temperature and the initial inlet pipe temperature is not smaller than the second preset temperature value, judging that the outdoor unit is connected correctly with the corresponding indoor unit.
Optionally, if the difference between the first minimum real-time inlet pipe temperature and the initial inlet pipe temperature is not less than the first preset temperature value, and the difference between the second maximum real-time inlet pipe temperature and the initial inlet pipe temperature is not less than the second preset temperature value, before determining that the outdoor unit is connected correctly with the corresponding indoor unit, the method further includes:
Judging whether the absolute value of the difference value between the first maximum real-time inlet pipe temperature and the environment temperature is not smaller than a third preset temperature value and/or whether the absolute value of the difference value between the second minimum real-time inlet pipe temperature and the environment temperature is not smaller than a fourth preset temperature value,
If yes, judging that the outdoor unit is connected with the corresponding indoor unit correctly;
If not, judging that the outdoor unit and the corresponding indoor unit have connection faults, or judging that the outdoor unit and the corresponding indoor unit are connected correctly, and the inlet pipe temperature sensing bulb and the outlet pipe temperature sensing bulb are positioned on the same side of the evaporator.
Compared with the prior art, the invention has the beneficial effects that:
The invention provides a debugging fault detection method for multi-split air conditioner engineering, when the method is used for detecting whether communication connection between an outdoor unit and an indoor unit in a multi-split air conditioner system is correct, initial inlet pipe temperatures on inlet pipes of a plurality of indoor units are firstly obtained; then triggering a plurality of outdoor units and a plurality of indoor units to respectively operate in the same refrigeration mode and heating mode so as to obtain at least one of the maximum real-time inlet pipe temperature and the minimum real-time inlet pipe temperature of the indoor units in different modes; and finally, comparing the minimum real-time inlet pipe temperature obtained in the refrigeration mode, the maximum real-time inlet pipe temperature obtained in the heating mode and the initial inlet pipe temperature, and judging whether the outdoor unit is connected with the indoor unit correctly or not according to the comparison result. The real-time pipe inlet temperature obtained in the two modes is compared with the initial temperature, so that compared with the prior art, the influence of the external environment on the detection result can be reduced to the greatest extent, whether the outdoor unit is connected with the indoor unit in a communication manner can be accurately judged, and the accuracy of the detection result is effectively improved.
Drawings
FIG. 1 is a schematic flow chart of a multi-split engineering debugging fault detection method provided by the invention.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, are intended to be within the scope of the present invention.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The technical scheme provided by the invention is described below with reference to fig. 1 and a specific embodiment.
Aiming at the problem of poor accuracy caused by environmental influence existing in the diagnosis method for whether the communication connection between the outdoor unit and the indoor unit of the multi-split air conditioning system is correct in the prior art, the embodiment provides the multi-split engineering debugging fault detection method capable of improving the multi-split air conditioning system. The multi-split air conditioning system debugging fault detection method aims at detecting the related parameter change of the indoor units through the debugging operation action of the multi-split air conditioning system in the installation and debugging stage, and can accurately judge whether the outdoor units and the corresponding indoor units are in the same connecting system (namely whether communication connection is correct or not) under the influence of effectively avoiding the external environment, so that the problem of communication misconnection is solved before formal operation, meanwhile, the overhaul efficiency of carrying out communication connection on the indoor units and the corresponding outdoor units is improved, and the engineering installation quality and user experience are ensured.
Specifically, the multi-split engineering debugging fault detection method comprises the following steps:
acquiring initial inlet pipe temperatures on inlet pipes of a plurality of indoor units;
In particular, in this embodiment, the inlet pipe temperature sensing bulb is installed on the liquid inlet pipe of the evaporator of the indoor unit, and before the debugging operation instruction is sent, the initial inlet pipe temperature Ti of the refrigerant flowing through the liquid inlet pipe of the evaporator of the indoor unit can be detected by the inlet pipe temperature sensing bulb.
Triggering a plurality of outdoor units and a plurality of indoor units to respectively operate in the same refrigeration mode and heating mode so as to acquire at least one of the maximum real-time inlet pipe temperature and the minimum real-time inlet pipe temperature of the indoor units in different modes;
In the embodiment, after detecting the debugging operation instruction, the outdoor unit is first converted into a refrigeration mode to start up, so that the outdoor unit enters a normal starting platform, and meanwhile, the starting of the compressor is controlled by the control system, and the compressor is kept to operate at a set frequency after being started. It should be noted that, the setting frequency of the compressor can be determined by those skilled in the art according to specific working conditions, so as to achieve the best operation performance and energy efficiency, which is not limited in this embodiment.
And then, converting the plurality of indoor units into a refrigeration mode to perform starting operation, and simultaneously keeping fans in the indoor units in a stopped state. After the compressor operates for a period of time at a set frequency, a plurality of real-time inlet pipe temperatures Tci in a refrigerating mode are detected through inlet pipe temperature sensing bags on each indoor unit, the largest real-time inlet pipe temperature Tci is set as a first largest real-time inlet pipe temperature Tci_max, and the smallest real-time inlet pipe temperature Tci is set as a first smallest real-time inlet pipe temperature Tci_min.
And then, the whole multi-split air conditioning system is shut down, the outdoor unit is converted into a heating mode to start, so that the outdoor unit enters a normal starting platform, meanwhile, the compressor is controlled to start again through the control system, and after the compressor is started, the compressor is kept to run at the same set frequency as in the refrigerating mode.
And then, converting the plurality of indoor units into a heating mode to start operation, and simultaneously keeping the fans in the indoor units in a stopped state. After the compressor operates for a period of time at a set frequency, a plurality of real-time inlet pipe temperatures Thi in a heating mode are detected through inlet pipe temperature sensing bags on each indoor unit, the largest real-time inlet pipe temperature Thi is set to be the second largest real-time inlet pipe temperature thi_max, and the smallest real-time inlet pipe temperature Thi is set to be the second smallest real-time inlet pipe temperature thi_max.
Comparing the minimum real-time inlet pipe temperature obtained in the refrigeration mode, the maximum real-time inlet pipe temperature obtained in the heating mode and the initial inlet pipe temperature, and judging whether the outdoor unit and the indoor unit are connected correctly or not according to the comparison result.
In specific implementation, the first minimum real-time inlet pipe temperature Tci_min obtained in the refrigeration mode is compared with the initial inlet pipe temperature Ti, and the second maximum real-time inlet pipe temperature Thi_max obtained in the heating mode is compared with the initial inlet pipe temperature Ti, so that whether the outdoor unit and the indoor unit are connected correctly is judged according to a comparison result.
The reason for the above arrangement is that: when the outdoor unit and the indoor unit are both in the refrigeration mode for the first time, if the ambient temperature of the indoor unit and the ambient temperature of the outdoor unit are both low and have small difference, even if the outdoor unit is connected with the indoor unit in a correct communication manner, the indoor unit is in the refrigeration mode successfully, the refrigeration effect of the indoor unit is not obvious, and the temperature of the refrigerant passing through the liquid outlet pipe of the evaporator is approximately the same as the temperature of the refrigerant passing through the liquid inlet pipe of the evaporator. Meanwhile, the condenser may change the temperature of the refrigerant flowing out of the liquid outlet pipe to a small extent, and even a case may occur in which the temperature of the refrigerant flowing into the liquid inlet pipe of the condenser is approximately the same as the temperature of the refrigerant flowing out of the liquid outlet pipe of the condenser, resulting in that the first minimum real-time inlet pipe temperature tci_min is almost equal to the initial inlet pipe temperature Ti.
When the outdoor unit and the indoor unit are in a heating mode, the refrigerant is compressed into high-temperature high-pressure gas by the action of the compressor and then is conveyed into the evaporator in the opposite direction, and at the moment, the high-temperature refrigerant in the evaporator and low-temperature ambient air generate heat exchange due to the fact that the ambient temperature of the indoor unit is low, the high-temperature refrigerant is changed into low-temperature refrigerant, therefore, the temperature change of the refrigerant flowing through the liquid inlet pipe of the evaporator is obvious, and the indoor unit and the corresponding outdoor unit can be judged to be connected correctly in a communication mode. Therefore, only if the real-time inlet pipe temperature obtained in the two modes is compared with the initial inlet pipe temperature at the same time so as to minimize the influence of the external environment on the detection result, whether the outdoor unit is in communication connection with the indoor unit can be accurately judged, and the accuracy of the detection result is improved.
In this embodiment, after obtaining the first minimum real-time inlet temperature tci_min in the cooling mode and the second maximum real-time inlet temperature thi_max in the heating mode, it is determined whether the absolute value of the difference between tci_min and Ti is smaller than a first preset temperature value a1, and whether the absolute value of the difference between thi_max and Ti is smaller than a second preset temperature value b1, if yes, it is determined that a communication connection fault exists between the outdoor unit and the corresponding indoor unit. At this time, the diagnostic personnel detects and eliminates the fault of the connection pipe between each outdoor unit and each indoor unit.
It should be noted that, in order to further accurately determine whether the outdoor unit and the indoor unit are in a communication connection state, in this embodiment, when it is determined that the absolute value of the difference between tci_min and Ti is smaller than a1 and the absolute value of the difference between thi_max and Ti is smaller than b1, it is further required to determine whether the absolute value of the difference between tci_max and tci_min is smaller than a third preset temperature value a2 and whether the absolute value of the difference between thi_max and thi_min is smaller than a fourth preset temperature value b2. And if one of the absolute values of the differences between the Tci_max and the Tci_min is smaller than a2 and the absolute value of the difference between the Thi_max and the Thi_min is smaller than b2, judging that the outdoor unit and the corresponding indoor unit have connection faults, otherwise, judging that the outdoor unit and the corresponding indoor unit are connected correctly. Through the arrangement, the situation that the judgment is wrong when the indoor unit receives the signals of the outdoor unit and is in the refrigerating mode and the heating mode successfully, but the inlet pipe temperature and the outlet pipe temperature of the evaporator are smaller in phase difference is avoided, so that the judgment accuracy of the detection result is improved, and the working pressure of a diagnostic person is reduced.
It will be appreciated that in this embodiment, the absolute value of a1 is greater than a2, and the absolute value of b1 is greater than b2.
For example, if the absolute value of the difference between tci_min and Ti is smaller than a1 and the absolute value of the difference between thi_max and Ti is not smaller than b2, it can be known that the indoor unit and the outdoor unit are connected correctly, the refrigerating effect of the indoor unit is not obvious in the refrigerating mode, and the heating effect is obvious in the heating mode; or the absolute value of the difference between Tci_min and Ti is not smaller than a1, and the absolute value of the difference between Thi_max and Ti is smaller than b2, the indoor unit and the outdoor unit are correctly connected, the refrigerating effect of the indoor unit is obvious in the refrigerating mode, and the heating effect is not obvious in the heating mode.
In this embodiment, an environmental temperature sensing bulb is further disposed on the indoor unit, so as to obtain an environmental temperature Tei of the environment where the indoor unit is located. It should be noted that, if the absolute value of the difference between tci_min and Ti is smaller than a1 and the absolute value of the difference between thi_max and Ti is not smaller than b2, before determining that the indoor unit and the outdoor unit are connected correctly, it is also necessary to determine whether the absolute value of the difference between thi_max and thi_min is not smaller than b2 and whether the absolute value of the difference between thi_max and Tei is not smaller than b2. If the absolute value of the difference between Thi_max and Thi_min is not smaller than b2 and the absolute value of the difference between Thi_max and Tei is not smaller than b2, judging that the communication connection between the outdoor unit and the corresponding outdoor unit is correct; otherwise, judging that the outdoor unit and the corresponding indoor unit have connection faults, or the outdoor unit and the corresponding indoor unit are connected correctly, and the inlet pipe temperature sensing bulb and the outlet pipe temperature sensing bulb are positioned on the same side of the evaporator, so that the temperature difference is smaller due to the fact that the distance between the inlet pipe temperature sensing bulb and the outlet pipe temperature sensing bulb is too short.
Further, if the absolute value of the difference between tci_min and Ti is not smaller than a1 and the absolute value of the difference between thi_max and Ti is smaller than b2, it is further required to determine whether the absolute value of the difference between tci_max and tci_min is not smaller than a2 and whether the absolute value of the difference between tci_max and Tei is not smaller than a2 before determining that the indoor unit and the outdoor unit are properly connected. If the absolute value of the difference between Tci_max and Tci_min is not smaller than a2 and the absolute value of the difference between Tci_max and Tei is not smaller than a2, judging that the communication connection between the outdoor unit and the corresponding outdoor unit is correct; otherwise, judging that the outdoor unit and the corresponding indoor unit have connection faults, or the outdoor unit and the corresponding indoor unit are connected correctly, and the inlet pipe temperature sensing bulb and the outlet pipe temperature sensing bulb are positioned on the same side of the evaporator, so that the temperature difference is smaller due to the fact that the distance between the inlet pipe temperature sensing bulb and the outlet pipe temperature sensing bulb is too short.
In this embodiment, if the absolute value of the difference between tci_min and Ti is not less than a1 and the absolute value of the difference between thi_max and Ti is not less than b1, it can be known that the indoor unit and the outdoor unit are connected correctly, and the cooling effect of the indoor unit in the cooling mode and the heating effect in the heating mode are both obvious.
In order to improve the accuracy of the detection result determination when the absolute value of the difference between tci_min and Ti is not smaller than a1 and the absolute value of the difference between thi_max and Ti is not smaller than b1, in this embodiment, before determining that the outdoor unit is connected to the corresponding indoor unit correctly, it is also necessary to determine whether the absolute value of the difference between tci_max and Tei is not smaller than a2 and whether the absolute value of the difference between thi_min and Tei is not smaller than b2. If at least one of the absolute values of the differences of Tci_max and Tei is not smaller than a2 and the absolute values of the differences of Thi_min and Tei is not smaller than b2 is satisfied, the communication connection between the outdoor unit and the corresponding indoor unit can be judged to be correct; otherwise, communication investigation or detection of the position of the inlet pipe temperature sensing bulb is needed to ensure that the inlet pipe temperature sensing bulb is arranged on the liquid inlet pipe of the evaporator, and the position of the inlet pipe temperature sensing bulb and the position of the outlet pipe temperature sensing bulb on the same side of the evaporator are avoided.
In the description herein, reference to the term "one embodiment," "an example," 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, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in the foregoing embodiments, and that the embodiments described in the foregoing embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art.
The technical principle of the present invention is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the invention and should not be taken in any way as limiting the scope of the invention. Other embodiments of the invention will be apparent to those skilled in the art from consideration of this specification without undue burden.
Claims (9)
1. The utility model provides a many online engineering debugging fault detection method for many online air conditioning system, many online air conditioning system includes a plurality of off-premises stations and a plurality of indoor set, its characterized in that, the method includes:
Acquiring initial inlet pipe temperatures on the inlet pipes of a plurality of indoor units;
triggering a plurality of outdoor units and a plurality of indoor units to respectively operate in the same refrigeration mode and heating mode so as to acquire at least one of the maximum real-time inlet pipe temperature and the minimum real-time inlet pipe temperature of the indoor units in different modes;
comparing the minimum real-time inlet pipe temperature obtained in the refrigerating mode, the maximum real-time inlet pipe temperature obtained in the heating mode and the initial inlet pipe temperature, and judging whether the outdoor unit and the indoor unit are connected correctly or not according to a comparison result.
2. The method of claim 1, wherein triggering the plurality of outdoor units and the plurality of indoor units to operate in the same cooling mode and heating mode, respectively, to obtain at least one of a maximum real-time intake temperature and a minimum real-time intake temperature of the indoor units in different modes, comprises:
Triggering a plurality of outdoor units and a plurality of indoor units to run in the same refrigeration mode, stopping a fan of the indoor units, and arranging an inlet pipe temperature sensing bulb and an outlet pipe temperature sensing bulb on an evaporator of the indoor units to obtain a first maximum real-time inlet pipe temperature and a first minimum real-time inlet pipe temperature;
And triggering a plurality of outdoor units and a plurality of indoor units to run in the same heating mode, and stopping a fan of the indoor units so as to obtain a second maximum real-time inlet pipe temperature and a second minimum real-time inlet pipe temperature through the inlet pipe temperature sensing bag and the outlet pipe temperature sensing bag respectively.
3. The method for detecting a debugging fault of a multi-split air conditioner according to claim 2, wherein comparing the minimum real-time inlet temperature obtained in the cooling mode and the maximum real-time inlet temperature obtained in the heating mode with the initial inlet temperature, respectively, and determining whether the outdoor unit and the indoor unit are connected correctly according to the comparison result, comprises:
And judging whether the absolute value of the difference between the first minimum real-time inlet pipe temperature and the initial inlet pipe temperature is smaller than a first preset temperature value, judging whether the absolute value of the difference between the second maximum real-time inlet pipe temperature and the initial inlet pipe temperature is smaller than a second preset temperature value, and if yes, judging that the outdoor unit and the corresponding indoor unit have connection faults.
4. The method for detecting a debug failure of a multi-split air conditioner according to claim 3, wherein if an absolute value of a difference between the first minimum real-time inlet temperature and the initial inlet temperature is smaller than a first preset temperature value, and an absolute value of a difference between the second maximum real-time inlet temperature and the initial inlet temperature is smaller than a second preset temperature value, before determining that a connection failure exists between the outdoor unit and the corresponding indoor unit, the method further comprises:
judging whether the absolute value of the difference value of the first maximum real-time pipe inlet temperature and the first minimum real-time pipe inlet temperature is smaller than a third preset temperature value and/or whether the absolute value of the difference value of the second maximum real-time pipe inlet temperature and the second minimum real-time pipe inlet temperature is smaller than a fourth preset temperature value,
If yes, judging that the outdoor unit and the corresponding indoor unit have connection faults;
If not, the connection between the outdoor unit and the corresponding indoor unit is judged to be correct.
5. The method for detecting a debugging fault of a multi-split air conditioner according to claim 3, wherein determining whether the absolute value of the difference between the first minimum real-time inlet temperature and the initial inlet temperature is smaller than a first preset temperature value, and determining whether the absolute value of the difference between the second maximum real-time inlet temperature and the initial inlet temperature is smaller than a second preset temperature value, if not, includes:
If the difference between the first minimum real-time inlet pipe temperature and the initial inlet pipe temperature is smaller than the first preset temperature value, the difference between the second maximum real-time inlet pipe temperature and the initial inlet pipe temperature is not smaller than the second preset temperature value;
or if the difference value between the first minimum real-time inlet pipe temperature and the initial inlet pipe temperature is not smaller than the first preset temperature value, the difference value between the second maximum real-time inlet pipe temperature and the initial inlet pipe temperature is smaller than the second preset temperature value, and the connection between the outdoor unit and the corresponding indoor unit is judged to be correct.
6. The multi-split engineering debugging fault detection method of claim 5, wherein,
The indoor unit is also provided with an environment temperature sensing bulb, and the environment temperature sensing bulb is used for acquiring the environment temperature after acquiring the initial inlet tube temperatures of the liquid inlet tubes of the indoor units;
If the difference between the first minimum real-time inlet pipe temperature and the initial inlet pipe temperature is smaller than the first preset temperature value, the difference between the second maximum real-time inlet pipe temperature and the initial inlet pipe temperature is not smaller than the second preset temperature value, and before the fact that the outdoor unit is correctly connected with the corresponding indoor unit is judged, the method further comprises the following steps:
Judging whether the absolute value of the difference between the second maximum real-time inlet pipe temperature and the second minimum real-time inlet pipe temperature is not less than a fourth preset temperature value or not and whether the absolute value of the difference between the second maximum real-time inlet pipe temperature and the environment temperature is not less than the fourth preset temperature value or not,
If yes, judging that the outdoor unit is connected with the corresponding indoor unit correctly;
If not, judging that the outdoor unit and the corresponding indoor unit have connection faults, or judging that the outdoor unit and the corresponding indoor unit are connected correctly, and the inlet pipe temperature sensing bulb and the outlet pipe temperature sensing bulb are positioned on the same side of the evaporator.
7. The method for detecting a debugging fault of a multi-split air conditioner according to claim 6, wherein if the difference between the first minimum real-time inlet temperature and the initial inlet temperature is smaller than the first preset temperature value, the difference between the second maximum real-time inlet temperature and the initial inlet temperature is not smaller than the second preset temperature value, and before determining that the connection between the outdoor unit and the corresponding indoor unit is correct, the method further comprises:
Judging whether the absolute value of the difference between the first maximum real-time inlet pipe temperature and the first minimum real-time inlet pipe temperature is not less than a third preset temperature value or not and whether the absolute value of the difference between the first maximum real-time inlet pipe temperature and the environment temperature is not less than the third preset temperature value or not,
If yes, judging that the outdoor unit is connected with the corresponding indoor unit correctly;
If not, judging that the outdoor unit and the corresponding indoor unit have connection faults, or judging that the outdoor unit and the corresponding indoor unit are connected correctly, and the inlet pipe temperature sensing bulb and the outlet pipe temperature sensing bulb are positioned on the same side of the evaporator.
8. The method for detecting a debugging fault of a multi-split air conditioner according to claim 6, wherein determining whether the absolute value of the difference between the first minimum real-time inlet temperature and the initial inlet temperature is smaller than a first preset temperature value, and determining whether the absolute value of the difference between the second maximum real-time inlet temperature and the initial inlet temperature is smaller than a second preset temperature value, if not, includes:
And if the difference value between the first minimum real-time inlet pipe temperature and the initial inlet pipe temperature is not smaller than the first preset temperature value, and the difference value between the second maximum real-time inlet pipe temperature and the initial inlet pipe temperature is not smaller than the second preset temperature value, judging that the outdoor unit is connected correctly with the corresponding indoor unit.
9. The method for detecting a debugging fault of a multiple on-line project according to claim 8, wherein if the difference between the first minimum real-time inlet temperature and the initial inlet temperature is not smaller than the first preset temperature value and the difference between the second maximum real-time inlet temperature and the initial inlet temperature is not smaller than the second preset temperature value, before determining that the connection between the outdoor unit and the corresponding indoor unit is correct, further comprising:
Judging whether the absolute value of the difference value between the first maximum real-time inlet pipe temperature and the environment temperature is not smaller than a third preset temperature value and/or whether the absolute value of the difference value between the second minimum real-time inlet pipe temperature and the environment temperature is not smaller than a fourth preset temperature value,
If yes, judging that the outdoor unit is connected with the corresponding indoor unit correctly;
If not, judging that the outdoor unit and the corresponding indoor unit have connection faults, or judging that the outdoor unit and the corresponding indoor unit are connected correctly, and the inlet pipe temperature sensing bulb and the outlet pipe temperature sensing bulb are positioned on the same side of the evaporator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410111620.6A CN117928046A (en) | 2024-01-26 | 2024-01-26 | Multi-split engineering debugging fault detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410111620.6A CN117928046A (en) | 2024-01-26 | 2024-01-26 | Multi-split engineering debugging fault detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117928046A true CN117928046A (en) | 2024-04-26 |
Family
ID=90750438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410111620.6A Pending CN117928046A (en) | 2024-01-26 | 2024-01-26 | Multi-split engineering debugging fault detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117928046A (en) |
-
2024
- 2024-01-26 CN CN202410111620.6A patent/CN117928046A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107084494B (en) | Fault detection method and device for electronic expansion valve and multi-connected air conditioning system | |
| CN106247530B (en) | More air-conditioning self checking methods are dragged in multitube frequency conversion one | |
| CN103293010B (en) | Method and device and system for detecting air conditioner coolants | |
| CN204787070U (en) | Refrigerant air conditioning apparatus | |
| CN102563819A (en) | Air conditioner and troubleshooting method thereof | |
| CN101231016B (en) | Device and method for connecting and detecting pipe of multi-connected air conditioner | |
| CN102519119A (en) | Air conditioner with fault self-diagnosis function and fault self-diagnosis method thereof | |
| CN109357357B (en) | Method for diagnosing compressor exhaust temperature detection abnormality, multi-split air conditioner, and storage medium | |
| CN108731127B (en) | Multi-pipe multi-connected outdoor unit and pipeline detection method and device thereof | |
| CN113063215B (en) | Rotating speed control method of air conditioner external fan | |
| CN112944586B (en) | Control method of multi-split air conditioning system | |
| CN105674507A (en) | Method and device for detecting refrigerants of air conditioner | |
| CN107062538A (en) | A kind of air conditioner intelligent detecting method | |
| WO2019184332A1 (en) | Protection system of refrigeration device and protection method for safe operation of compressor | |
| Katipamula et al. | Rooftop unit embedded diagnostics: Automated fault detection and diagnostics (AFDD) development, field testing and validation | |
| CN111023461A (en) | Detection control method and system of air conditioner, air conditioner and storage medium | |
| KR20070017269A (en) | Pipe inspection operation and method of Multi air conditioner | |
| CN110940091B (en) | Fluorine deficiency judgment method and heat pump water heater | |
| CN104535884A (en) | Method for judging whether indoor machine data line of domestic multi-split unit is wrongly connected | |
| CN102967450B (en) | Method for detecting whether outdoor unit check valve of split type air conditioning unit is installed reversely | |
| CN117928046A (en) | Multi-split engineering debugging fault detection method | |
| CN110926544B (en) | Detection equipment for heat exchanger unit and online automatic detection method thereof | |
| CN107560105B (en) | Method and device for judging connection pipe error of four-way valve and machine readable storage medium | |
| CN112097364B (en) | Air conditioner and electronic expansion valve fault detection method thereof | |
| CN112611071A (en) | Improved method for judging failure of four-way valve of air-cooled air conditioning unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination |