CN106369697A - Multi-split system and failure detection method for main flow path valve body assembly of multi-split system - Google Patents
Multi-split system and failure detection method for main flow path valve body assembly of multi-split system Download PDFInfo
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- CN106369697A CN106369697A CN201610695754.2A CN201610695754A CN106369697A CN 106369697 A CN106369697 A CN 106369697A CN 201610695754 A CN201610695754 A CN 201610695754A CN 106369697 A CN106369697 A CN 106369697A
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- Prior art keywords
- flow path
- primary flow
- path valve
- valve component
- pressure reduction
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/14—Heat exchangers specially adapted for separate outdoor units
- F24F1/16—Arrangement or mounting thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/06—Damage
Abstract
The invention discloses a multi-split system and a failure detection method for a main flow path valve body assembly of the multi-split system. The multi-split system comprises an outdoor unit, a distributing device and a plurality of indoor units. The distributing device comprises a first heat exchanger, a second heat exchanger and the main flow path valve body assembly; and the main flow path valve body assembly is arranged between an outlet of a first heat exchange flow path of the first heat exchanger and an inlet of a first heat exchange flow path of the second heat exchanger and comprises a first throttling element and a first control valve connected with the first throttling element in parallel. The failure detection method comprises the following steps that when the multi-split system operates in a pure refrigeration mode, the front-back pressure difference of the main flow path valve body assembly is obtained; and whether the main flow path valve body assembly malfunctions or not is judged according to the front-back pressure difference of the main flow path valve body assembly. According to the failure detection method, whether the main flow path valve body assembly malfunctions or not is quickly and effectively judged to ensure the safe and reliable operation of the system in the operating process of the multi-split system.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly to the fault of a kind of multiple on-line system and its primary flow path valve component
Detection method.
Background technology
Multiple on-line system can be freezed simultaneously and be heated, but due to system complex, valve body is numerous, not only will have perfect
Control logic carry out application valve body action, and valve body to be ensured can normal work, thus ensureing that system can be reliably and with long-term
Run.
Generally, in multiple on-line system, the adapter of indoor set and part flow arrangement needs welded and installed, due to indoor set number of units relatively
Many, corresponding solder joint is also more, in system operation it is possible to occur, in the valve body that welding slag is blocked in part flow arrangement, leading to valve
Body occur abnormal it is also possible to lead to valve body fault the problems such as because of valve body ageing failure and cannot reliably working.Therefore, how to exist
Under conditions of the normal operation of guarantee system, still can detect whether part flow arrangement breaks down, be skill urgently to be resolved hurrily at present
Art problem.
Content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.
For this reason, it is an object of the present invention to proposing a kind of fault detect of primary flow path valve component in multiple on-line system
Method, the method can rapidly and effectively judge whether primary flow path valve component is sent out in multiple on-line system running
It is out of order, thus ensureing system safe and reliable operation.
Further object is that proposing a kind of multiple on-line system.
For achieving the above object, one aspect of the present invention embodiment proposes primary flow path valve component in a kind of multiple on-line system
Fault detection method, described multiple on-line system includes off-premises station, part flow arrangement and multiple indoor set, and described part flow arrangement includes
First Heat Exchanger, the second heat exchanger and described primary flow path valve component, described primary flow path valve component is arranged on described first and changes
Between the outlet of the first heat exchange stream of hot device and the entrance of the first heat exchange stream of described second heat exchanger, described primary flow path valve
Body assembly includes first throttle element and the first control valve with described first throttle element in parallel, and methods described includes following step
Rapid: when described multiple on-line system is run, to obtain the pressure reduction in front and back of described primary flow path valve component with pure refrigeration mode；And root
Judge whether described primary flow path valve component breaks down according to pressure reduction before and after described primary flow path valve component.
The fault detection method of primary flow path valve component in multiple on-line system according to embodiments of the present invention, in multi-connected machine system
System when running with pure refrigeration mode, obtains the pressure reduction in front and back of primary flow path valve component, then according to primary flow path valve component before
Pressure reduction judges whether primary flow path valve component breaks down afterwards, thus in multiple on-line system running, can quickly and have
Effect judge whether primary flow path valve component sends fault it is ensured that system safe and reliable operation.
According to one embodiment of present invention, the described pressure reduction in front and back according to described primary flow path valve component judges described master
Whether stream valve component breaks down, comprising: if the pressure reduction in front and back of described primary flow path valve component is pre- more than described first
If value, then judge that described primary flow path valve component breaks down.
According to one embodiment of present invention, after judging that described primary flow path valve component breaks down, also include: control
Make described first control valve to close, and control described first throttle element to keep current aperture constant；Judge the first Preset Time
Before and after interior described primary flow path valve component, whether pressure reduction raises the second preset value；If described master in described first Preset Time
Before and after stream valve component, pressure reduction does not raise described second preset value, then judge that described first control valve breaks down.
According to one embodiment of present invention, after judging that described primary flow path valve component breaks down, also include: control
Making described first control valve keeps current state constant, and controls described first throttle element to close；Judge the second Preset Time
Before and after interior described primary flow path valve component, whether pressure reduction raises the 3rd preset value；If described master in described second Preset Time
Before and after stream valve component, pressure reduction does not raise described 3rd preset value, then judge described first throttle element failure.
According to one embodiment of present invention, when described multiple on-line system is run with pure refrigeration mode, control described the
One restricting element is opened to default maximum opening, and it is fully opened to control described first control valve to be in.
For achieving the above object, a kind of multiple on-line system that another aspect of the present invention embodiment proposes, comprising: off-premises station；
Part flow arrangement, described part flow arrangement includes First Heat Exchanger, the second heat exchanger and described primary flow path valve component, described primary flow path
Valve component is arranged on the outlet of the first heat exchange stream of described First Heat Exchanger and the first heat exchange stream of described second heat exchanger
Between the entrance on road, described primary flow path valve component includes first throttle element and with described first throttle element in parallel first
Control valve；Multiple indoor sets；Control module, described control module is used for running with pure refrigeration mode in described multiple on-line system
When, obtain the pressure reduction in front and back of described primary flow path valve component, and institute is judged according to pressure reduction before and after described primary flow path valve component
State whether primary flow path valve component breaks down.
Multiple on-line system according to embodiments of the present invention, control module when multiple on-line system is run with pure refrigeration mode,
Obtain the pressure reduction in front and back of primary flow path valve component, then primary flow path valve body group is judged according to pressure reduction before and after primary flow path valve component
Whether part breaks down, thus in multiple on-line system running, can rapidly and effectively judge primary flow path valve body group
Part whether sends fault it is ensured that system safe and reliable operation.
According to one embodiment of present invention, described control module is sentenced according to pressure reduction before and after described primary flow path valve component
When whether the described primary flow path valve component that breaks breaks down, wherein, if the pressure reduction in front and back of described primary flow path valve component is more than
Described first preset value, described control module then judges that described primary flow path valve component breaks down.
According to one embodiment of present invention, described control module breaks down it judging described primary flow path valve component
Afterwards, also control described first control valve to close, and control described first throttle element to keep current aperture constant, and judge the
In one Preset Time, whether the pressure reduction in front and back of described primary flow path valve component raises the second preset value, wherein, if described first
In Preset Time, the pressure reduction in front and back of described primary flow path valve component does not raise described second preset value, and described control module then judges
Described first control valve breaks down.
According to one embodiment of present invention, described control module breaks down it judging described primary flow path valve component
Afterwards, also control described first control valve to keep current state constant, and control described first throttle element to close, and judge the
In two Preset Times, whether the pressure reduction in front and back of described primary flow path valve component raises the 3rd preset value, wherein, if described second
In Preset Time, the pressure reduction in front and back of described primary flow path valve component does not raise described 3rd preset value, and described control module then judges
Described first throttle element failure.
According to one embodiment of present invention, when described multiple on-line system is run with pure refrigeration mode, described control mould
Block controls described first throttle element to open to default maximum opening, and controls described first control valve to be in fully open shape
State.
Brief description
Fig. 1 is the flow process of the fault detection method of primary flow path valve component in multiple on-line system according to embodiments of the present invention
Figure；And
Fig. 2 is the structural representation of multiple on-line system according to an embodiment of the invention.
Specific embodiment
Embodiments of the invention are described below in detail, the example of described embodiment is shown in the drawings, wherein from start to finish
The element that same or similar label represents same or similar element or has same or like function.Below with reference to attached
The embodiment of figure description is exemplary it is intended to be used for explaining the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings the multiple on-line system of embodiment of the present invention proposition and its event of primary flow path valve component to be described
Barrier detection method.
Fig. 1 is the flow process of the fault detection method of primary flow path valve component in multiple on-line system according to embodiments of the present invention
Figure.
In an embodiment of the present invention, as shown in Fig. 2 multiple on-line system may include off-premises station, part flow arrangement and multiple room
Interior machine, part flow arrangement includes First Heat Exchanger, the second heat exchanger and primary flow path valve component, and primary flow path valve component is arranged on
Between the outlet of the first heat exchange stream of one heat exchanger and the entrance of the first heat exchange stream of the second heat exchanger, primary flow path valve body group
Part includes first throttle element and the first control valve with first throttle element in parallel.
When multiple on-line system is run with pure refrigeration mode, from off-premises station supercool coolant out through part flow arrangement gas
Liquid/gas separator, First Heat Exchanger, primary flow path valve component (first throttle element and the first control valve), the second heat exchanger and refrigeration
After check valve, after the restricting element throttling of the indoor set that freezes, absorbed heat in the indoor set having refrigeration can need, then passed through phase
The refrigeration electromagnetic valve answered flows into the low-voltage tube of part flow arrangement, eventually passes back to off-premises station.
When multiple on-line system is run with pure refrigeration mode, the first throttle element in primary flow path valve component will be opened to pre-
If maximum opening, and the first control valve be in fully opened.
As shown in figure 1, in this multiple on-line system primary flow path valve component fault detection method, comprise the following steps:
S1, when multiple on-line system is run, obtains the pressure reduction in front and back of primary flow path valve component with pure refrigeration mode.
According to pressure reduction before and after primary flow path valve component, s2, judges whether primary flow path valve component breaks down.
According to one embodiment of present invention, primary flow path valve component is judged according to pressure reduction before and after primary flow path valve component
Whether break down, comprising: if the pressure reduction in front and back of primary flow path valve component is more than the first preset value, judge primary flow path valve body
Component failure.Wherein, the first preset value can be demarcated according to practical situation, and for example, the first preset value can be
0.5mpa.
Specifically, as shown in Fig. 2 when multiple on-line system is run with pure refrigeration mode, according to control logic, will be controlled
One restricting element is opened to default maximum opening, controls the first control valve to be in fully opened simultaneously.In system operation mistake
Cheng Zhong, the upstream pressure ps1 of real-time detection primary flow path valve component and downstream pressure ps2, and calculate primary flow path valve component
Pressure reduction △ p=ps1-ps2 in front and back, under conditions of cold medium shortage in system, if the pressure in front and back of primary flow path valve component
Difference △ p ＞ the first preset value, then the coolant circulation in explanation primary flow path valve component is not smooth, now judges primary flow path valve component
In first throttle element or the first control valve break down.Thus in multiple on-line system running, can quickly and
Effectively judge whether primary flow path valve component sends fault, and do not affect the normal operation of system.
According to one embodiment of present invention, after judging that primary flow path valve component breaks down, also include: control the
One control valve is closed, and controls first throttle element to keep current aperture constant；Judge primary flow path valve body in the first Preset Time
Before and after assembly, whether pressure reduction raises the second preset value；If the pressure reduction in front and back of primary flow path valve component is not in the first Preset Time
Raise the second preset value, then judge that the first control valve breaks down.Wherein, the first Preset Time and the second preset value can be according to realities
Border situation is demarcated, and for example, the first Preset Time can be 1min, and the second preset value can be 0.2mpa.
Further, after judging that primary flow path valve component breaks down, also include: control the first control valve to keep working as
Front state is constant, and controls first throttle element to close；Judge the pressure reduction in front and back of primary flow path valve component in the second Preset Time
Whether raise the 3rd preset value；If the pressure reduction in front and back of primary flow path valve component does not raise the 3rd and presets in the second Preset Time
Value, then judge first throttle element failure.Wherein, the second Preset Time and the 3rd preset value can be carried out according to practical situation
Demarcate, for example, the second Preset Time can be 1min, and the 3rd preset value can be 0.2mpa.
That is, when multiple on-line system is run with pure refrigeration mode, first primary flow path valve is judged according to decision condition
Whether body assembly breaks down, and then judges that specifically which valve body breaks down further according to decision condition.
After judging that primary flow path valve component breaks down, can first detect whether the first control valve breaks down, this
When send the first control valve out code, and control first throttle element keep current aperture constant.If main in certain time
Before and after stream valve component, the rise of pressure reduction △ p is less than the second preset value, then illustrate that the first control valve is actual and be not turned off, report
First control valve fault；Otherwise, the first control valve is normal.
Then, control the first control valve to keep current state constant, and send first throttle element out code, to detect
Whether first throttle element occurs therefore normal.If the rise of the pressure reduction △ p in front and back of primary flow path valve component is little in certain time
In the 3rd preset value, then illustrate that first throttle element is actual and be not turned off, report first throttle element fault；Otherwise, first throttle unit
Part is normal.Such that it is able to determine whether out it is which valve body breaks down.
In sum, in multiple on-line system according to embodiments of the present invention primary flow path valve component fault detection method,
When multiple on-line system is run, obtain the pressure reduction in front and back of primary flow path valve component with pure refrigeration mode, then according to primary flow path valve
Before and after body assembly, pressure reduction judges whether primary flow path valve component breaks down, thus in multiple on-line system running, energy
Enough rapidly and effectively judge whether primary flow path valve component sends fault it is ensured that system safe and reliable operation.
Fig. 2 is the structural representation of multiple on-line system according to an embodiment of the invention.As shown in Fig. 2 this multi-connected machine
System includes: off-premises station 100, part flow arrangement 200, multiple indoor set 300 and control module (in figure is not specifically illustrated).
Wherein, part flow arrangement 200 includes First Heat Exchanger 210, the second heat exchanger 220 and primary flow path valve component 230, main
The outlet that stream valve component 230 is arranged on the first heat exchange stream of First Heat Exchanger 210 is changed with the first of the second heat exchanger 220
Between the entrance of hot flowpath, primary flow path valve component 230 includes first throttle element 231 and in parallel with first throttle element 231
The first control valve 232.Control module is used for, when multiple on-line system is run with pure refrigeration mode, obtaining primary flow path valve component
Pressure reduction before and after 230, and judge whether primary flow path valve component 230 occurs according to pressure reduction before and after primary flow path valve component 230
Fault.
According to one embodiment of present invention, control module judges master according to pressure reduction before and after primary flow path valve component 230
When whether stream valve component 230 breaks down, wherein, if the pressure reduction in front and back of primary flow path valve component 230 is pre- more than first
If value, control module then judges that primary flow path valve component 230 breaks down.Wherein, the first preset value can be 0.5mpa.
Specifically, as shown in Fig. 2 when multiple on-line system is run with pure refrigeration mode, from off-premises station 100 out supercool
Coolant is through the gas-liquid separator 240 of part flow arrangement 200, First Heat Exchanger 210, primary flow path valve component 230 (first throttle unit
Part 231 and the first control valve 232), the second heat exchanger 220 and refrigeration check valve 250 after, through freeze indoor set restricting element section
After stream, absorbed heat in the indoor set having refrigeration can need, then pass through corresponding refrigeration electromagnetic valve 260 and flow into part flow arrangement 200
Low-voltage tube, eventually pass back to off-premises station 100.
When multiple on-line system is run with pure refrigeration mode, according to control logic, control module will control first throttle unit
Part 231 is opened to default maximum opening, controls the first control valve 232 to be in fully opened simultaneously.In system operation
In, control module passes through upstream pressure ps1 and downstream pressure ps2 of temperature sensor real-time detection primary flow path valve component 230,
And calculate primary flow path valve component 230 before and after pressure reduction △ p=ps1-ps2, under conditions of cold medium shortage in system, such as
Pressure reduction △ p ＞ the first preset value before and after fruit primary flow path valve component 230, then the coolant in explanation primary flow path valve component 230
Circulation is not smooth, now judges that the first throttle element 231 in primary flow path valve component 230 or the first control valve 232 occur event
Barrier.Thus in multiple on-line system running, can rapidly and effectively judge whether primary flow path valve component 230 sends
Fault, and do not affect the normal operation of system.
According to one embodiment of present invention, control module, after judging that primary flow path valve component 230 breaks down, is gone back
Control the first control valve 232 to close, and control first throttle element 231 to keep current aperture constant, and judge that first presets
In time, whether the pressure reduction in front and back of primary flow path valve component 230 raises the second preset value.If primary flow path in the first Preset Time
Before and after valve component 230, pressure reduction does not raise the second preset value, and control module then judges that the first control valve 232 breaks down.Its
In, the first Preset Time can be 1min, and the second preset value can be 0.2mpa.
Further, control module, after judging that primary flow path valve component 230 breaks down, also controls the first control valve
232 keep current state constant, and control first throttle element 231 to close, and judge primary flow path valve in the second Preset Time
Before and after body assembly 230, whether pressure reduction raises the 3rd preset value, if before primary flow path valve component 230 in the second Preset Time
Pressure reduction does not raise the 3rd preset value afterwards, and control module then judges that first throttle element 231 breaks down.Wherein, second default when
Between can be 1min, the 3rd preset value can be 0.2mpa.
That is, when multiple on-line system is run with pure refrigeration mode, control module judges according to decision condition first
Whether primary flow path valve component 230 breaks down, and then judges that specifically which valve body breaks down further according to decision condition.
Control module, after judging that primary flow path valve component 230 breaks down, can first detect that the first control valve 232 is
No break down, now send the first control valve out code, and control first throttle element 231 to keep current aperture constant.
If the rise of the pressure reduction △ p in front and back of primary flow path valve component 230 is less than the second preset value in certain time, illustrate first
Control valve 232 is actual to be not turned off, and reports the first control valve 232 fault；Otherwise, the first control valve 232 is normal.
Then, control module controls the first control valve 232 to keep current state constant, and sends the closing of first throttle element
Instruction, to detect whether first throttle element 231 occurs therefore normal.If before and after primary flow path valve component 230 in certain time
The rise of pressure reduction △ p is less than the 3rd preset value, then illustrate that first throttle element 231 is actual and be not turned off, report first throttle element
231 faults；Otherwise, first throttle element 231 is normal.Such that it is able to determine whether out it is which valve body breaks down.
Multiple on-line system according to embodiments of the present invention, control module when multiple on-line system is run with pure refrigeration mode,
Obtain the pressure reduction in front and back of primary flow path valve component, then primary flow path valve body group is judged according to pressure reduction before and after primary flow path valve component
Whether part breaks down, thus in multiple on-line system running, can rapidly and effectively judge primary flow path valve body group
Part whether sends fault it is ensured that system safe and reliable operation.
In describing the invention it is to be understood that term " first ", " second " are only used for describing purpose, and can not
It is interpreted as indicating or imply relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " the
One ", the feature of " second " can be expressed or implicitly include at least one this feature.In describing the invention, " multiple "
It is meant that at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integral；Can be that machinery connects
Connect or electrically connect；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements, limit unless otherwise clear and definite.For those of ordinary skill in the art
For, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy describing with reference to this embodiment or example
Point is contained at least one embodiment or the 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.And, the specific features of description, structure, material or feature can be in office
Combine in an appropriate manner in one or more embodiments or example.Additionally, in the case of not conflicting, the skill of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be tied by art personnel
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 be interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changes, replacing and modification.
Claims (10)
1. in a kind of multiple on-line system the fault detection method of primary flow path valve component it is characterised in that described multiple on-line system
Including off-premises station, part flow arrangement and multiple indoor set, described part flow arrangement includes First Heat Exchanger, the second heat exchanger and described master
Stream valve component, described primary flow path valve component be arranged on the outlet of the first heat exchange stream of described First Heat Exchanger with described
Between the entrance of the first heat exchange stream of the second heat exchanger, described primary flow path valve component include first throttle element and with described
First control valve of first throttle element in parallel, the method comprising the steps of:
When described multiple on-line system is run, obtain the pressure reduction in front and back of described primary flow path valve component with pure refrigeration mode；And
Judge whether described primary flow path valve component breaks down according to pressure reduction before and after described primary flow path valve component.
2. in multiple on-line system as claimed in claim 1 the fault detection method of primary flow path valve component it is characterised in that institute
State and judge whether described primary flow path valve component breaks down according to pressure reduction before and after described primary flow path valve component, comprising:
If pressure reduction is more than described first preset value before and after described primary flow path valve component, judge described primary flow path valve body group
Part breaks down.
3. in multiple on-line system as claimed in claim 2 primary flow path valve component fault detection method it is characterised in that
After judging that described primary flow path valve component breaks down, also include:
Control described first control valve to close, and control described first throttle element to keep current aperture constant；
Judge whether the pressure reduction in front and back of described primary flow path valve component in the first Preset Time raises the second preset value；
If the pressure reduction in front and back of described primary flow path valve component does not raise described second preset value in described first Preset Time,
Judge that described first control valve breaks down.
4. in multiple on-line system as claimed in claim 2 primary flow path valve component fault detection method it is characterised in that
After judging that described primary flow path valve component breaks down, also include:
Control described first control valve to keep current state constant, and control described first throttle element to close；
Judge whether the pressure reduction in front and back of described primary flow path valve component in the second Preset Time raises the 3rd preset value；
If the pressure reduction in front and back of described primary flow path valve component does not raise described 3rd preset value in described second Preset Time,
Judge described first throttle element failure.
5. in the multiple on-line system as any one of claim 1-4 primary flow path valve component fault detection method, its
Be characterised by, when described multiple on-line system is run with pure refrigeration mode, control described first throttle element open to default
Big aperture, and it is fully opened to control described first control valve to be in.
6. a kind of multiple on-line system is it is characterised in that include:
Off-premises station；
Part flow arrangement, described part flow arrangement includes First Heat Exchanger, the second heat exchanger and described primary flow path valve component, described master
The outlet that stream valve component is arranged on the first heat exchange stream of described First Heat Exchanger is changed with the first of described second heat exchanger
Between the entrance of hot flowpath, described primary flow path valve component include first throttle element and with described first throttle element in parallel
First control valve；
Multiple indoor sets；
Control module, described control module is used for, when described multiple on-line system is run with pure refrigeration mode, obtaining described main flow
Pressure reduction before and after the valve component of road, and described primary flow path valve component is judged according to pressure reduction before and after described primary flow path valve component
Whether break down.
7. multiple on-line system as claimed in claim 6 is it is characterised in that described control module is according to described primary flow path valve body group
When before and after part, pressure reduction judges whether described primary flow path valve component breaks down, wherein,
If pressure reduction is more than described first preset value before and after described primary flow path valve component, described control module then judges described
Primary flow path valve component breaks down.
8. multiple on-line system as claimed in claim 7 is it is characterised in that described control module is judging described primary flow path valve body
After component failure, also control described first control valve to close, and control described first throttle element to keep current aperture
Constant, and judge described primary flow path valve component in the first Preset Time before and after pressure reduction whether raise the second preset value, its
In, if the pressure reduction in front and back of described primary flow path valve component does not raise described second preset value, institute in described first Preset Time
State control module and then judge that described first control valve breaks down.
9. multiple on-line system as claimed in claim 7 is it is characterised in that described control module is judging described primary flow path valve body
After component failure, also control described first control valve to keep current state constant, and control described first throttle element
Close, and judge whether the pressure reduction in front and back of described primary flow path valve component in the second Preset Time raises the 3rd preset value, its
In, if the pressure reduction in front and back of described primary flow path valve component does not raise described 3rd preset value, institute in described second Preset Time
State control module and then judge described first throttle element failure.
10. the multiple on-line system as any one of claim 6-9 is it is characterised in that in described multiple on-line system with pure
When refrigeration mode runs, described control module controls described first throttle element to open to default maximum opening, and controls described
First control valve is in fully opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610695754.2A CN106369697A (en) | 2016-08-19 | 2016-08-19 | Multi-split system and failure detection method for main flow path valve body assembly of multi-split system |
Applications Claiming Priority (1)
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