CN105299841B - The fault detection method of the heat exchange valve body of multiple on-line system and its outdoor heat exchanger - Google Patents
The fault detection method of the heat exchange valve body of multiple on-line system and its outdoor heat exchanger Download PDFInfo
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- CN105299841B CN105299841B CN201510776579.5A CN201510776579A CN105299841B CN 105299841 B CN105299841 B CN 105299841B CN 201510776579 A CN201510776579 A CN 201510776579A CN 105299841 B CN105299841 B CN 105299841B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
Abstract
The invention discloses a kind of fault detection method of the heat exchange valve body of outdoor heat exchanger in multiple on-line system, comprise the following steps：After multiple on-line system receives heat exchange valve physical examination survey instruction, N number of heat exchange valve body is controlled to be all turned on, and control compressor to be run with predeterminated frequency so that multiple on-line system enters refrigeration mode；After the first preset time, the outlet temperature of each heat exchange unit is obtained, and whether heat exchange valve body breaks down according to corresponding to the outlet temperature of each heat exchange unit judges each heat exchange unit.Whether the fault detection method valve body that can go out to exchange heat according to the outlet temperature effective detection of heat exchange unit breaks down, so as to ensure the safe and reliable operation of system.The invention also discloses a kind of multiple on-line system.
Description
Technical field
The present invention relates to air-conditioning technical field, the heat exchange valve body of outdoor heat exchanger in more particularly to a kind of multiple on-line system
Fault detection method and a kind of multiple on-line system.
Background technology
In multiple on-line system, such as two pipes system heat-reclamation multi-compressors system, outdoor heat exchanger is generally by three sections of heat exchangers
Composition, and a magnetic valve is all correspondingly arranged in the inlet ductwork of each section of heat exchanger, with by controlling opening for magnetic valve
Open and close to realize the regulation of the heat exchange capacity of outdoor heat exchanger.
But because the pipe fitting in multiple on-line system and magnetic valve need welded and installed, therefore in system operation, Ke Nengyou
Welding slag is blocked in magnetic valve, and the magnetic valve not blocked may also break down because heated, so as to influence system
Normal operation, therefore, it is necessary to be detected to magnetic valve in the manufacture and operation maintenance of multiple on-line system.
The content of the invention
It is contemplated that at least solves one of technical problem in correlation technique to a certain extent.Therefore, the present invention
One purpose, can be according to changing in a kind of fault detection method of the heat exchange valve body of outdoor heat exchanger in multiple on-line system is proposed
Whether the outlet temperature effective detection of the hot cell valve body that goes out to exchange heat breaks down, so as to ensure the safe and reliable operation of system.
It is another object of the present invention to propose a kind of multiple on-line system.
To achieve the above object, one aspect of the present invention embodiment proposes a kind of changing for outdoor heat exchanger in multiple on-line system
The fault detection method of thermal valve body, the multiple on-line system include compressor, outdoor heat exchanger and indoor heat exchanger, the outdoor
Heat exchanger includes N number of heat exchange unit, is correspondingly arranged in the inlet ductwork of each heat exchange unit in N number of heat exchange unit
Exchange heat valve body, and the inlet ductwork of the exhaust outlet of the compressor respectively with each heat exchange unit is connected, the compressor
Gas returning port be connected with the indoor heat exchanger, N is integer more than 1, and the fault detection method comprises the following steps：S1,
After the multiple on-line system receives heat exchange valve physical examination survey instruction, N number of heat exchange valve body is controlled to be all turned on, and control the pressure
Contracting machine is run so that the multiple on-line system enters refrigeration mode with predeterminated frequency；S2, after the first preset time, described in acquisition
The outlet temperature of each heat exchange unit, and each heat exchange unit pair is judged according to the outlet temperature of each heat exchange unit
Whether the heat exchange valve body answered breaks down.
The fault detection method of the heat exchange valve body of outdoor heat exchanger in multiple on-line system according to embodiments of the present invention, more
After on-line system receives heat exchange valve physical examination survey instruction, control N number of heat exchange valve body to be all turned on, and control compressor to preset frequently
Rate is run so that multiple on-line system enters refrigeration mode, after a period of time, obtains the outlet temperature of each heat exchange unit, and according to
The outlet temperature of each heat exchange unit judges whether heat exchange valve body breaks down corresponding to each heat exchange unit, so as to realize heat exchange
The rapidly and effectively detection of valve body, and then ensure the safe and reliable operation of system.
According to one embodiment of present invention, passed by the temperature being arranged on the export pipeline of each heat exchange unit
The outlet temperature of sensor detection each heat exchange unit.
According to one embodiment of present invention, in step sl, before controlling N number of heat exchange valve body to be all turned on,
Also outdoor fan is controlled to start, and after the outdoor fan runs the second preset time, according to each heat exchange unit
Outlet temperature and the outdoor environment temperature temperature sensor that judges to be arranged on the export pipeline of each heat exchange unit be
No normal work.
According to one embodiment of present invention, in step sl, after the multiple on-line system enters refrigeration mode, also
The target exhaust saturation temperature of the compressor is heightened to preset value.
According to one embodiment of present invention, each heat exchange is judged according to the outlet temperature of each heat exchange unit
Whether heat exchange valve body breaks down corresponding to unit, specifically includes：Obtain outlet temperature and the outdoor of each heat exchange unit
Temperature gap between environment temperature；Between the outlet temperature and the outdoor environment temperature that judge each heat exchange unit
Whether temperature gap is less than preset temperature threshold value；If the outlet temperature of any one heat exchange unit and the outdoor environment temperature
Between temperature gap be less than the preset temperature threshold value, then judge that heat exchange valve body breaks down corresponding to the heat exchange unit.
To achieve the above object, another aspect of the present invention embodiment proposes a kind of multiple on-line system, including compressor, room
External heat exchanger and indoor heat exchanger, the outdoor heat exchanger include N number of heat exchange unit, and each in N number of heat exchange unit changes
Heat exchange valve body is correspondingly arranged in the inlet ductwork of hot cell, the exhaust outlet of the compressor is single with each heat exchange respectively
The inlet ductwork of member is connected, and the gas returning port of the compressor is connected with the indoor heat exchanger, and N is the integer more than 1, described
Multiple on-line system also includes：Temperature detecting module, for detecting the outlet temperature of each heat exchange unit；Control module, use
In controlling N number of heat exchange valve body to be all turned on after receiving heat exchange valve physical examination and surveying instruction, and the compressor is controlled with default frequency
Rate is run so that the multiple on-line system enters refrigeration mode, and each heat exchange unit is obtained after the first preset time
Outlet temperature, and the valve body that exchanged heat according to corresponding to the outlet temperature of each heat exchange unit judges each heat exchange unit
Whether break down.
Multiple on-line system according to embodiments of the present invention, after multiple on-line system receives heat exchange valve physical examination survey instruction, control
Make N number of heat exchange valve body to be all turned on, and control compressor to be run with predeterminated frequency so that multiple on-line system enters refrigeration mode, one
After the section time, the outlet temperature of each heat exchange unit is obtained, and each heat exchange is judged according to the outlet temperature of each heat exchange unit
Whether heat exchange valve body breaks down corresponding to unit, so as to realize the rapidly and effectively detection of heat exchange valve body, and then ensures system
The safe and reliable operation of system.
According to one embodiment of present invention, the temperature detecting module includes N number of temperature sensor, N number of temperature
Sensor is correspondingly arranged on the export pipeline of each heat exchange unit.
According to one embodiment of present invention, before controlling N number of heat exchange valve body to be all turned on, the control module
Also outdoor fan is controlled to start, and after the outdoor fan runs the second preset time, the control module is according to
The outlet temperature and outdoor environment temperature of each heat exchange unit judge to be arranged on the export pipeline of each heat exchange unit
Temperature sensor whether normal work.
According to one embodiment of present invention, after the multiple on-line system enters refrigeration mode, the control module
Also the target exhaust saturation temperature of the compressor is heightened to preset value.
According to one embodiment of present invention, the control module is further used for obtaining going out for each heat exchange unit
Temperature gap between mouth temperature and outdoor environment temperature, and judge the outlet temperature of each heat exchange unit and the outdoor
Whether the temperature gap between environment temperature is less than preset temperature threshold value, wherein, if the outlet temperature of any one heat exchange unit
Temperature gap between degree and the outdoor environment temperature is less than the preset temperature threshold value, and the control module then judges that this is changed
Heat exchange valve body breaks down corresponding to hot cell.
Brief description of the drawings
Fig. 1 is the fault detect of the heat exchange valve body of outdoor heat exchanger in multiple on-line system according to an embodiment of the invention
The flow chart of method.
Fig. 2 is the structural representation of multiple on-line system according to an embodiment of the invention.
Fig. 3 is the failure inspection of the heat exchange valve body of outdoor heat exchanger in multiple on-line system in accordance with another embodiment of the present invention
The flow chart of survey method.
Reference：Compressor 10, outdoor heat exchanger 20, the first heat exchange unit 21, the heat exchange of the second heat exchange unit the 22, the 3rd
Unit 23, indoor heat exchanger 30, first exchange heat valve body 40, second exchange heat valve body the 50, the 3rd exchange heat valve body 60, outdoor fan 70,
Indoor fan 80, electric expansion valve 90, the first check valve 100, the second check valve 110, the 3rd check valve 120, the first temperature pass
Sensor TA, second temperature sensor TB, three-temperature sensor TC.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
The heat exchange of outdoor heat exchanger in the multiple on-line system proposed according to embodiments of the present invention described with reference to the accompanying drawings
The fault detection method and multiple on-line system of valve body.
Fig. 1 is the fault detect of the heat exchange valve body of outdoor heat exchanger in multiple on-line system according to an embodiment of the invention
The flow chart of method.
In an embodiment of the present invention, multiple on-line system includes compressor, outdoor heat exchanger and indoor heat exchanger, and outdoor is changed
Hot device includes N number of heat exchange unit, and heat exchange valve is correspondingly arranged in the inlet ductwork of each heat exchange unit in N number of heat exchange unit
Body, the inlet ductwork of the exhaust outlet of compressor respectively with each heat exchange unit are connected, the gas returning port of compressor and indoor heat exchange
Device is connected, and N is the integer more than 1.Wherein, the valve body that exchanges heat can be magnetic valve.
Specifically, as shown in Fig. 2 when outdoor heat exchanger includes the first heat exchange unit, the second heat exchange unit and the 3rd heat exchange
During unit, the first heat exchange valve body is provided with the inlet ductwork of the first heat exchange unit, in the inlet ductwork of the second heat exchange unit
The second heat exchange valve body is provided with, the 3rd heat exchange valve body is provided with the inlet ductwork of the 3rd heat exchange unit.In addition, in the embodiment
In, multiple on-line system can also include outdoor fan, indoor fan, electric expansion valve, the first check valve, the second check valve and
3rd check valve, the first to the 3rd check valve are correspondingly arranged on the export pipeline of the first to the 3rd heat exchange unit.
As shown in figure 1, the fault detection method of the heat exchange valve body of outdoor heat exchanger includes following step in the multiple on-line system
Suddenly：
S1, after multiple on-line system receives heat exchange valve physical examination survey instruction, N number of heat exchange valve body is controlled to be all turned on, and control
Compressor processed is run so that multiple on-line system enters refrigeration mode with predeterminated frequency.Wherein, predeterminated frequency can according to circumstances enter
Rower is determined.
S2, after the first preset time, obtain the outlet temperature of each heat exchange unit, and going out according to each heat exchange unit
Mouth temperature judges whether heat exchange valve body breaks down corresponding to each heat exchange unit.Wherein, the first preset time can be according to reality
Border situation is demarcated.
According to one embodiment of present invention, the temperature sensor by being arranged on the export pipeline of each heat exchange unit
Detect the outlet temperature of each heat exchange unit.
Specifically, as shown in Fig. 2 can be by the first temperature for being arranged between the first heat exchange unit and the first check valve
Sensor detect the first heat exchange unit outlet temperature, by be arranged between the second heat exchange unit and the second check valve second
Temperature sensor detects the outlet temperature of the second heat exchange unit, and by be arranged on the 3rd heat exchange unit and the 3rd check valve it
Between three-temperature sensor detect the 3rd heat exchange unit outlet temperature.
When the heat exchange valve body of outdoor heat exchanger in needing to multiple on-line system detects, heat exchange valve physical examination is sent first
Instruction is surveyed to multiple on-line system, after multiple on-line system receives heat exchange valve physical examination survey instruction, controls the first to the 3rd heat exchange valve
Body is all turned on, and controls multiple on-line system to run in a chiller mode, and the high frequency operation of control compressor.
Wherein, when multiple on-line system is run in a chiller mode, the high pressure gaseous refrigerant come out from compressor passes through
Enter outdoor heat exchanger after first to the 3rd heat exchange valve body, become high normal pressure and temperature liquid refrigerants after outdoor heat exchanger condenses, it is high
Normal pressure and temperature liquid refrigerants becomes low-temp low-pressure gaseous mixture after electric expansion valve reducing pressure by regulating flow, is absorbed heat indoors in heat exchanger
After become low-temp low-pressure gaseous coolant, finally return to compressor.
After multiple on-line system runs the first preset time (such as 2min), the first heat exchange is obtained by the first temperature sensor
The outlet temperature of unit, and by the outlet temperature of second temperature sensor the second heat exchange unit of acquisition, and pass through the 3rd temperature
The outlet temperature that sensor obtains the 3rd heat exchange unit is spent, the first heat exchange valve is then judged according to the outlet temperature of acquisition respectively
Whether body, the second heat exchange valve body and the 3rd heat exchange valve body break down.For example, if the first of the detection of the first temperature sensor changes
The outlet temperature of hot cell is higher, then showing can be by the first heat exchange valve from the high pressure gaseous refrigerant that compressor comes out
Body reaches the first temperature sensor, so as to judge that the first heat exchange valve body does not break down；If the first temperature sensor
The outlet temperature detected is smaller, then illustrates that the heat exchange path is not actually opened because of heat exchange valve body failure, from compressor
High pressure gaseous refrigerant out can not reach the position of the first temperature sensor by the first heat exchange valve body, so as to realize the
The rapidly and effectively detection of one heat exchange valve body.
According to one embodiment of present invention, in step sl, before controlling N number of heat exchange valve body to be all turned on, also control
Outdoor fan processed starts, and after outdoor fan runs the second preset time, according to the outlet temperature of each heat exchange unit and
Outdoor environment temperature judge to be arranged on temperature sensor on the export pipeline of each heat exchange unit whether normal work.Wherein,
Second preset time can be demarcated according to actual conditions.
Specifically, as shown in Fig. 2 after multiple on-line system receives heat exchange valve physical examination survey instruction, outdoor fan is controlled
Start, and control the first to the 3rd heat exchange valve body to be all turned on.After outdoor fan runs 5min, pass through the first to the 3rd temperature
Sensor detects the outlet temperature of the first to the 3rd heat exchange unit, and respectively compared with current outdoor environment temperature.If
The outlet temperature of heat exchange unit is close with outdoor environment temperature, then shows the temperature sensor normal work, and otherwise, the temperature passes
Sensor breaks down.For example, the outlet temperature and outdoor environment temperature of the first heat exchange unit when the detection of the first temperature sensor
When differing bigger, then show that the first temperature sensor breaks down, now need to change the first temperature sensor, from
And improve the reliability of heat exchanging valve body detection.
According to one embodiment of present invention, in step sl, will also pressure after multiple on-line system enters refrigeration mode
The target exhaust saturation temperature of contracting machine is heightened to preset value.Wherein, preset value can be demarcated according to actual conditions.
According to one embodiment of present invention, judge that each heat exchange unit is corresponding according to the outlet temperature of each heat exchange unit
Heat exchange valve body whether break down, specifically include：Between the outlet temperature and the outdoor environment temperature that obtain each heat exchange unit
Temperature gap；It is default to judge whether the temperature gap between the outlet temperature of each heat exchange unit and outdoor environment temperature is less than
Temperature threshold；If the temperature gap between the outlet temperature and outdoor environment temperature of any one heat exchange unit is less than default temperature
Threshold value is spent, then judges that heat exchange valve body breaks down corresponding to the heat exchange unit.Wherein, preset temperature threshold value can be according to actual feelings
Condition is demarcated.
Specifically, as shown in figure 3, when multiple on-line system receives heat exchange valve physical examination and surveys instruction, refrigeration start life is sent
Order, outdoor fan start running, and control N number of heat exchange valve body to be all turned on (step S101-S102).Run in outdoor fan
After 5min, judge be arranged on the export pipeline of each heat exchange unit temperature sensor detection outlet temperature whether with outdoor
Environment temperature is close (temperature gap is in a less scope), if close, shows the normal work of each temperature sensor
Make (step S103).Then, the operation of compressor high frequency is controlled, and is run in a chiller mode, while by the target exhaust of compressor
Saturation temperature is heightened to 55 DEG C (step S104), after multiple on-line system runs 2min, if the detection of each temperature sensor
Outlet temperature and outdoor environment temperature temperature gap be more than 5 DEG C, then show corresponding to heat exchange valve body do not break down；If
Temperature gap is less than 5 DEG C, then shows that corresponding heat exchange valve body is not actually opened, the high pressure gaseous come out from compressor is cold
Matchmaker is not through the position that heat exchange valve body reaches temperature sensor, so as to prove the heat exchange valve body hair corresponding to the temperature sensor
Raw failure (step S105-S113).
In summary, in multiple on-line system according to embodiments of the present invention outdoor heat exchanger heat exchange valve body fault detect
Method, after multiple on-line system receives heat exchange valve physical examination survey instruction, N number of heat exchange valve body is controlled to be all turned on, and control compression
Machine is run so that multiple on-line system enters refrigeration mode with predeterminated frequency, after a period of time, obtains the outlet of each heat exchange unit
Temperature, and whether heat exchange valve body breaks down according to corresponding to the outlet temperature of each heat exchange unit judges each heat exchange unit,
So as to realize the rapidly and effectively detection of heat exchange valve body, and then ensure the safe and reliable operation of system.And in exchange thermal valve
Before body is detected, also judge temperature sensor whether normal work, further increase heat exchange valve physical examination survey reliability.
Below in conjunction with the accompanying drawings come describe the embodiment of the present invention proposition multiple on-line system.
In an embodiment of the present invention, multiple on-line system includes compressor 10, outdoor heat exchanger 20 and indoor heat exchanger 30,
Outdoor heat exchanger 20 includes N number of heat exchange unit, is correspondingly arranged in the inlet ductwork of each heat exchange unit in N number of heat exchange unit
There is a heat exchange valve body, the inlet ductwork of the exhaust outlet of compressor 10 respectively with each heat exchange unit is connected, the return-air of compressor 10
Mouth is connected with indoor heat exchanger 30, and N is the integer more than 1.Wherein, the valve body that exchanges heat can be magnetic valve.
Specifically, as shown in Fig. 2 when outdoor heat exchanger 20 includes the first heat exchange unit 21, the second heat exchange unit 22 and the
During three heat exchange units 23, the first heat exchange valve body 40, the second heat exchange unit are provided with the inlet ductwork of the first heat exchange unit 21
The second heat exchange valve body 50 is provided with 22 inlet ductwork, the 3rd heat exchange valve is provided with the inlet ductwork of the 3rd heat exchange unit 23
Body 60.In addition, in this embodiment, multiple on-line system can also include outdoor fan 70, indoor fan 80, electric expansion valve
90th, the first check valve 100, the second check valve 110 and the 3rd check valve 120, the first to the 3rd check valve are correspondingly arranged at
On the export pipeline of one to the 3rd heat exchange unit.
In an embodiment of the present invention, multiple on-line system also includes：Temperature detecting module and control module be not (specific in figure
Show).
Wherein, temperature detecting module is used for the outlet temperature for detecting each heat exchange unit.Control module is used to receive
Heat exchange valve physical examination controls N number of heat exchange valve body to be all turned on after surveying instruction, and controls compressor 10 to be run with predeterminated frequency so that more
On-line system enters refrigeration mode, and the outlet temperature of each heat exchange unit is obtained after the first preset time, and according to every
The outlet temperature of individual heat exchange unit judges whether heat exchange valve body breaks down corresponding to each heat exchange unit.
According to one embodiment of present invention, temperature detecting module includes N number of temperature sensor, N number of temperature sensor pair
It should be arranged on the export pipeline of each heat exchange unit.
Specifically, as shown in Fig. 2 can by be arranged between the first heat exchange unit 21 and the first check valve 100
One temperature sensor TA detects the outlet temperature of the first heat exchange unit 21, by being arranged on the second heat exchange unit 22 and second unidirectional
Second temperature sensor TB between valve 110 detects the outlet temperature of the second heat exchange unit 22, and is changed by being arranged on the 3rd
Three-temperature sensor TC between the check valve 120 of hot cell 23 and the 3rd detects the outlet temperature of the 3rd heat exchange unit 23.
When the heat exchange valve body of outdoor heat exchanger in needing to multiple on-line system detects, heat exchange valve physical examination is sent first
Instruction is surveyed to multiple on-line system, after multiple on-line system receives heat exchange valve physical examination survey instruction, controls the first to the 3rd heat exchange valve
Body is all turned on, and controls multiple on-line system to run in a chiller mode, and the high frequency operation of control compressor 10.
Wherein, when multiple on-line system is run in a chiller mode, the high pressure gaseous refrigerant come out from compressor 10 leads to
Enter outdoor heat exchanger 20 after crossing the first to the 3rd heat exchange valve body, it is cold to become high normal pressure and temperature liquid after the condensation of outdoor heat exchanger 20
Matchmaker, high normal pressure and temperature liquid refrigerants become low-temp low-pressure gaseous mixture after the reducing pressure by regulating flow of electric expansion valve 90, exchanged heat indoors
Become low-temp low-pressure gaseous coolant after being absorbed heat in device 30, finally return to compressor 10.
After multiple on-line system runs the first preset time (such as 2min), obtain first by the first temperature sensor TA and change
The outlet temperature of hot cell 21, and pass through the outlet temperature of second temperature sensor TB the second heat exchange units 22 of acquisition, Yi Jitong
The outlet temperature that three-temperature sensor TC obtains the 3rd heat exchange unit 23 is crossed, is then judged respectively according to the outlet temperature of acquisition
Whether the first heat exchange heat exchange heat exchange valve body 23 of valve body 22 and the 3rd of valve body 21, second breaks down.For example, if the first temperature passes
The outlet temperature of first heat exchange unit 21 of sensor TA detections is higher, then shows the high pressure gaseous come out from compressor 10
Refrigerant can reach the first temperature sensor TA by the first heat exchange valve body 40, so as to judge the first heat exchange valve body 40 not
Break down；If the outlet temperature that the first temperature sensor TA is detected is smaller, illustrate the heat exchange path because of heat exchange valve
Body failure and it is not actually opened, from compressor 10 come out high pressure gaseous refrigerant can not by first heat exchange valve body 40 to
Up to the first temperature sensor TA position, so as to realize the rapidly and effectively detection of the first heat exchange valve body 40.
According to one embodiment of present invention, before controlling N number of heat exchange valve body to be all turned on, control module also control room
Outer blower fan 70 starts, and after outdoor fan 70 runs the second preset time, control module goes out according to each heat exchange unit
Mouth temperature and outdoor environment temperature judge the whether normal work of temperature sensor being arranged on the export pipeline of each heat exchange unit
Make.
Specifically, as shown in Fig. 2 after multiple on-line system receives heat exchange valve physical examination survey instruction, outdoor fan is controlled
70 start, and control the first to the 3rd heat exchange valve body to be all turned on.After outdoor fan 70 runs 5min, pass through first to the 3rd
Temperature sensor detects the outlet temperature of the first to the 3rd heat exchange unit, and respectively compared with current outdoor environment temperature.
If the outlet temperature of heat exchange unit is close with outdoor environment temperature, show the temperature sensor normal work, otherwise, the temperature
Spend sensor failure.For example, outlet temperature and outdoor when the first heat exchange unit 21 of the first temperature sensor TA detections
When environment temperature difference is bigger, then shows that the first temperature sensor TA breaks down, now need to the first temperature sensor
TA is changed, so as to improve the reliability of heat exchanging valve body detection.
According to one embodiment of present invention, after multiple on-line system enters refrigeration mode, control module will also compression
The target exhaust saturation temperature of machine 10 is heightened to preset value.
According to one embodiment of present invention, control module be further used for obtaining the outlet temperature of each heat exchange unit with
Temperature gap between outdoor environment temperature, and judge the temperature between the outlet temperature of each heat exchange unit and outdoor environment temperature
Whether degree difference is less than preset temperature threshold value, wherein, if the outlet temperature and outdoor environment temperature of any one heat exchange unit
Between temperature gap be less than preset temperature threshold value, control module then judge heat exchange valve body corresponding to the heat exchange unit occur therefore
Barrier.
Specifically, as shown in figure 3, when multiple on-line system receives heat exchange valve physical examination and surveys instruction, refrigeration start life is sent
Order, outdoor fan 70 start running, and control N number of heat exchange valve body to be all turned on (step S101-S102).Transported in outdoor fan 70
After row 5min, judge be arranged on the export pipeline of each heat exchange unit temperature sensor detection outlet temperature whether with room
External environment temperature close (temperature gap is in a less scope), if close, shows that each temperature sensor is normal
Work (step S103).Then, the operation of compressor 10 high frequency is controlled, and is run in a chiller mode, while by the mesh of compressor 10
Mark exhaust saturation temperature is heightened to 55 DEG C (step S104), after multiple on-line system runs 2min, if each temperature sensor
Detection outlet temperature and outdoor environment temperature temperature gap be more than 5 DEG C, then show corresponding to heat exchange valve body do not occur therefore
Barrier；If temperature gap is less than 5 DEG C, show that corresponding heat exchange valve body is not actually opened, the high temperature come out from compressor 10
High-pressure gaseous refrigerant is not through the position that heat exchange valve body reaches temperature sensor, so as to prove corresponding to the temperature sensor
Heat exchange valve body breaks down (step S105-S113).
Multiple on-line system according to embodiments of the present invention, after multiple on-line system receives heat exchange valve physical examination survey instruction, control
Make N number of heat exchange valve body to be all turned on, and control compressor to be run with predeterminated frequency so that multiple on-line system enters refrigeration mode, one
After the section time, the outlet temperature of each heat exchange unit is obtained, and each heat exchange is judged according to the outlet temperature of each heat exchange unit
Whether heat exchange valve body breaks down corresponding to unit, so as to realize the rapidly and effectively detection of heat exchange valve body, and then ensures system
The safe and reliable operation of system.And before heat exchanging valve body is detected, also judge temperature detecting module whether normal work, enter
One step improves the reliability of heat exchange valve physical examination survey.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or
Position relationship, it is for only for ease of and describes the present invention and simplify description, rather than indicates or imply that signified device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the invention, " multiple " are meant that at least two, such as two, three
It is individual etc., unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or electrically connect；Can be joined directly together, can also be indirectly connected by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements, limited unless otherwise clear and definite.For one of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature can be with "above" or "below" second feature
It is that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height and is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the different embodiments or example and the feature of different embodiments or example described in this specification
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (8)
1. the fault detection method of the heat exchange valve body of outdoor heat exchanger in a kind of multiple on-line system, it is characterised in that described multi-joint
Machine system includes compressor, outdoor heat exchanger and indoor heat exchanger, and the outdoor heat exchanger includes N number of heat exchange unit, described N number of
Heat exchange valve body, the exhaust outlet point of the compressor are correspondingly arranged in the inlet ductwork of each heat exchange unit in heat exchange unit
Inlet ductwork not with each heat exchange unit is connected, and the gas returning port of the compressor is connected with the indoor heat exchanger, N
For the integer more than 1, the fault detection method comprises the following steps：
S1, after the multiple on-line system receives heat exchange valve physical examination survey instruction, N number of heat exchange valve body is controlled to be all turned on, and control
The compressor is made to run so that the multiple on-line system enters refrigeration mode with predeterminated frequency；
S2, after the first preset time, the outlet temperature of each heat exchange unit is obtained, and according to each heat exchange unit
Outlet temperature judge whether heat exchange valve body breaks down corresponding to each heat exchange unit, wherein, each changed according to described
The outlet temperature of hot cell judges whether heat exchange valve body corresponding to each heat exchange unit breaks down, and specifically includes：Obtain
Temperature gap between the outlet temperature and outdoor environment temperature of each heat exchange unit；Judge each heat exchange unit
Whether the temperature gap between outlet temperature and the outdoor environment temperature is less than preset temperature threshold value；If any one exchanges heat
Temperature gap between the outlet temperature of unit and the outdoor environment temperature is less than the preset temperature threshold value, then judges that this is changed
Heat exchange valve body breaks down corresponding to hot cell.
2. the fault detection method of the heat exchange valve body of outdoor heat exchanger in multiple on-line system according to claim 1, it is special
Sign is, each heat exchange unit is detected by the temperature sensor being arranged on the export pipeline of each heat exchange unit
Outlet temperature.
3. the fault detection method of the heat exchange valve body of outdoor heat exchanger in multiple on-line system according to claim 2, it is special
Sign is, in step sl, before controlling N number of heat exchange valve body to be all turned on, also controls outdoor fan to start, and in institute
After stating outdoor fan the second preset time of operation, sentenced according to the outlet temperature of each heat exchange unit and outdoor environment temperature
The disconnected temperature sensor being arranged on the export pipeline of each heat exchange unit whether normal work.
4. the fault detection method of the heat exchange valve body of outdoor heat exchanger in multiple on-line system according to claim 1, it is special
Sign is, in step sl, after the multiple on-line system enters refrigeration mode, also the target exhaust of the compressor is satisfied
Heightened with temperature to preset value.
5. a kind of multiple on-line system, it is characterised in that including compressor, outdoor heat exchanger and indoor heat exchanger, the outdoor is changed
Hot device includes N number of heat exchange unit, is correspondingly arranged on and changes in the inlet ductwork of each heat exchange unit in N number of heat exchange unit
Thermal valve body, the inlet ductwork of the exhaust outlet of the compressor respectively with each heat exchange unit are connected, the compressor
Gas returning port is connected with the indoor heat exchanger, and N is the integer more than 1, and the multiple on-line system also includes：
Temperature detecting module, for detecting the outlet temperature of each heat exchange unit；
Control module, for controlling N number of heat exchange valve body to be all turned on after heat exchange valve physical examination survey instruction is received, and described in control
Compressor is run with predeterminated frequency so that the multiple on-line system enters refrigeration mode, and institute is obtained after the first preset time
The outlet temperature of each heat exchange unit is stated, and each heat exchange unit is judged according to the outlet temperature of each heat exchange unit
Whether corresponding heat exchange valve body breaks down, wherein, the control module is further used for obtaining each heat exchange unit
Temperature gap between outlet temperature and outdoor environment temperature, and judge the outlet temperature of each heat exchange unit and the room
Whether the temperature gap between external environment temperature is less than preset temperature threshold value, wherein, if the outlet of any one heat exchange unit
Temperature gap between temperature and the outdoor environment temperature is less than the preset temperature threshold value, and the control module then judges this
Heat exchange valve body breaks down corresponding to heat exchange unit.
6. multiple on-line system according to claim 5, it is characterised in that the temperature detecting module passes including N number of temperature
Sensor, N number of temperature sensor are correspondingly arranged on the export pipeline of each heat exchange unit.
7. multiple on-line system according to claim 6, it is characterised in that be all turned on controlling N number of heat exchange valve body
Before, the control module also controls outdoor fan to start, and after the outdoor fan runs the second preset time, it is described
Control module judges to be arranged on each heat exchange list according to the outlet temperature and outdoor environment temperature of each heat exchange unit
Member export pipeline on temperature sensor whether normal work.
8. multiple on-line system according to claim 5, it is characterised in that the multiple on-line system enter refrigeration mode it
Afterwards, the control module also heightens the target exhaust saturation temperature of the compressor to preset value.
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| CN105953483B (en) * | 2016-04-25 | 2018-11-20 | 广东美的暖通设备有限公司 | The abatement detecting method of multi-line system and its indoor unit restricting element |
| CN106016631B (en) * | 2016-07-07 | 2022-05-03 | 广东海悟科技有限公司 | Air conditioner monitoring system for machine room |
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| CN106871378B (en) * | 2017-03-29 | 2019-12-20 | 广东美的暖通设备有限公司 | Method and device for judging poor heat exchange of air conditioner |
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| CN110486918A (en) * | 2019-08-27 | 2019-11-22 | 广东美的暖通设备有限公司 | Detection components, control method and air conditioner for air conditioner |
| CN110595006A (en) * | 2019-09-29 | 2019-12-20 | 珠海格力电器股份有限公司 | Air valve fault monitoring method and device and air conditioning equipment |
| CN111397089B (en) * | 2020-03-26 | 2022-02-01 | 广东美的制冷设备有限公司 | Air conditioner detection method, air conditioner and computer readable storage medium |
| CN111503924B (en) * | 2020-04-29 | 2022-04-19 | 四川虹美智能科技有限公司 | Four-way valve fault detection method and device |
| CN114608141B (en) * | 2022-03-07 | 2023-12-01 | 浙江中烟工业有限责任公司 | Valve leakage diagnosis method and device for process air conditioning unit |
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