CN105241027B - The fault detection method of multiple on-line system and its valve body that exchanges heat - Google Patents
The fault detection method of multiple on-line system and its valve body that exchanges heat Download PDFInfo
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- CN105241027B CN105241027B CN201510733860.0A CN201510733860A CN105241027B CN 105241027 B CN105241027 B CN 105241027B CN 201510733860 A CN201510733860 A CN 201510733860A CN 105241027 B CN105241027 B CN 105241027B
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- heat exchange
- valve body
- exchange valve
- threshold value
- pressure value
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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
-
- 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, control multiple on-line system enters refrigeration mode, and controls compressor to be run with preset rotation speed；Control N number of heat exchange valve body to be opened and closed according to default sequential, and obtain the pressure value of the exhaust ports of compressor, to judge whether N number of heat exchange valve body breaks down according to pressure value.The fault detection method can the effective detection valve body that goes out to exchange heat whether break 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 fault detection method of heat exchange valve body in more particularly to a kind of multiple on-line system
A kind of and multiple on-line system.
Background technology
In multiple on-line system, such as two pipes system heat-reclamation multi-compressors system, it can be freezed and be heated simultaneously, therefore
By more and more extensive application.
In two pipes system heat-reclamation multi-compressors system, generally outdoor heat exchanger is divided into multistage (such as three-level), and auxiliary can
The DC fan of speed change realizes the electrodeless gear regulation of the heat exchange capacity of outdoor heat exchanger.In order to realize electrodeless gear regulation,
The import of every one-level of outdoor heat exchanger is both provided with a magnetic valve, to be realized by controlling the opening and closing of magnetic valve
The electrodeless gear 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, therefore in multi-connected machine
, it is necessary to be detected to magnetic valve in the manufacture and operation maintenance of 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 the valve body that exchanged heat in a kind of multiple on-line system is proposed fault detection method, can effective detection go out the valve body that exchanges heat
Whether break 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 failure for the valve body that exchanged heat in multiple on-line system
Detection method, the multiple on-line system include compressor, outdoor heat exchanger and indoor heat exchanger, and the outdoor heat exchanger includes N
Individual heat exchange unit, heat exchange valve body, institute are correspondingly arranged in the inlet ductwork of each heat exchange unit in N number of heat exchange unit
State inlet ductwork of the exhaust outlet of compressor respectively with each heat exchange unit to be connected, the gas returning port of the compressor and institute
State indoor heat exchanger to be connected, N is the integer more than 1, and the fault detection method comprises the following steps：S1, in the multi-connected machine
After system receives heat exchange valve physical examination survey instruction, the multiple on-line system is controlled to enter refrigeration mode, and control the compressor
Run with preset rotation speed；S2, control N number of heat exchange valve body to be opened and closed according to default sequential, and obtain the row of the compressor
Pressure value at gas port, to judge whether N number of heat exchange valve body breaks down according to the pressure value.
The fault detection method of heat exchange valve body, is received in multiple on-line system in multiple on-line system according to embodiments of the present invention
After surveying instruction to heat exchange valve physical examination, multiple on-line system is controlled to enter refrigeration mode first, and control compressor to be transported with preset rotation speed
OK, then control N number of heat exchange valve body to be opened and closed according to default sequential, and obtain the pressure value of the exhaust ports of compressor,
To judge whether N number of heat exchange valve body breaks down according to pressure value, so as to realize the effective detection of N number of heat exchange valve body, Jin Erbao
The safe and reliable operation of card system.
According to one embodiment of present invention, when it is described it is N number of heat exchange valve body be first heat exchange valve body, second heat exchange valve body and
During the 3rd heat exchange valve body, the step S2 is specifically included：The second heat exchange valve body and the 3rd heat exchange valve body is controlled to close,
And the first heat exchange valve body is controlled to open；The pressure value of the exhaust ports of the compressor is obtained after the first preset time,
And judge whether the pressure value is more than or equal to preset pressure threshold value；If the pressure value is more than or equal to the default pressure
Force threshold, then judge that the first heat exchange valve body breaks down；If the pressure value is less than the preset pressure threshold value, sentence
The disconnected first heat exchange valve body is in normal operating conditions.
Further, after the completion of judging the described first heat exchange valve body, the step S2 also includes：Control described first
Exchange heat valve body and the 3rd heat exchange valve body closing, and controls the second heat exchange valve body to open；In first preset time
The pressure value of the exhaust ports of the compressor is obtained afterwards, and judges whether the pressure value is more than or equal to the preset pressure
Threshold value；If the pressure value is more than or equal to the preset pressure threshold value, judge that the second heat exchange valve body breaks down；
If the pressure value is less than the preset pressure threshold value, judge that the second heat exchange valve body is in normal operating conditions.
Yet further, after the completion of judging the described second heat exchange valve body, the step S2 also includes：Control described
One heat exchange valve body and the second heat exchange valve body are closed, and control the 3rd heat exchange valve body to open；When described first is default
Between after obtain the compressor exhaust ports pressure value, and judge whether the pressure value is more than or equal to the default pressure
Force threshold；If the pressure value is more than or equal to the preset pressure threshold value, judge that event occurs for the 3rd heat exchange valve body
Barrier；If the pressure value is less than the preset pressure threshold value, judge that the 3rd heat exchange valve body is in normal operating conditions.
According to another embodiment of the invention, when N number of heat exchange valve body is the first heat exchange valve body, the second heat exchange valve body
During with the 3rd heat exchange valve body, the step S2 is specifically included：S201, control it is described first heat exchange valve body, second heat exchange valve body and
3rd heat exchange valve body is opened；S202, obtains the pressure value of the exhaust ports of the compressor after the first preset time, and sentences
Whether the pressure value of breaking is more than or equal to preset pressure threshold value；S203, if the pressure value is more than or equal to described preset
Pressure threshold, then judge that the first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body break down；S204, such as
Pressure value described in fruit is less than the preset pressure threshold value, then controls the first heat exchange valve body to close after the second preset time,
And re-execute step S202；S205, if the pressure value is more than or equal to the preset pressure threshold value, judge described
Two heat exchange valve bodies and the 3rd heat exchange valve body break down；S206, if the pressure value is less than the preset pressure threshold value,
Control the second heat exchange valve body to close after second preset time, and re-execute step S202；S207, if described
Pressure value is more than or equal to the preset pressure threshold value, then judges that the 3rd heat exchange valve body breaks down；S208, if described
Pressure value is less than the preset pressure threshold value, then judges that the 3rd heat exchange valve body is in normal operating conditions.
Further, after the step S204, the step S2 also includes：S209, if the pressure value is less than
The preset pressure threshold value, then control the 3rd heat exchange valve body to close after second preset time, and re-execute step
Rapid S202；S20a, if the pressure value is more than or equal to the preset pressure threshold value, judge the second heat exchange valve body hair
Raw failure；S20b, if the pressure value is less than the preset pressure threshold value, judge that the second heat exchange valve body is in normal
Working condition.
According to still another embodiment of the invention, when N number of heat exchange valve body is the first heat exchange valve body, the second heat exchange valve body
During with the 3rd heat exchange valve body, the step S2 is specifically included：S211, control it is described first heat exchange valve body, second heat exchange valve body and
3rd heat exchange valve body is opened；S212, obtains the pressure value of the exhaust ports of the compressor after the first preset time, and sentences
Whether the pressure value of breaking is more than or equal to preset pressure threshold value；S213, if the pressure value is more than or equal to described preset
Pressure threshold, then judge that the first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body break down；S214, such as
Pressure value described in fruit is less than the preset pressure threshold value, then controls the second heat exchange valve body to close after the second preset time,
And re-execute step S212；S215, if the pressure value is more than or equal to the preset pressure threshold value, judge described
One heat exchange valve body and the 3rd heat exchange valve body break down；S216, if the pressure value is less than the preset pressure threshold value,
Control the 3rd heat exchange valve body to close after second preset time, and re-execute step S212；S217, if described
Pressure value is more than or equal to the preset pressure threshold value, then judges that the first heat exchange valve body breaks down；S218, if described
Pressure value is less than the preset pressure threshold value, then judges that the first heat exchange valve body is in normal operating conditions.
Further, after the step S214, the step S2 also includes：S219, if the pressure value is less than
The preset pressure threshold value, then control the first heat exchange valve body to close after second preset time, and re-execute step
Rapid S212；S21a, if the pressure value is more than or equal to the preset pressure threshold value, judge the 3rd heat exchange valve body hair
Raw failure；S21b, if the pressure value is less than the preset pressure threshold value, judge that the 3rd heat exchange valve body is in normal
Working condition.
According to still a further embodiment, when N number of heat exchange valve body is the first heat exchange valve body, the second heat exchange valve body
During with the 3rd heat exchange valve body, the step S2 is specifically included：S221, control it is described first heat exchange valve body, second heat exchange valve body and
3rd heat exchange valve body is opened；S222, obtains the pressure value of the exhaust ports of the compressor after the first preset time, and sentences
Whether the pressure value of breaking is more than or equal to preset pressure threshold value；S223, if the pressure value is more than or equal to described preset
Pressure threshold, then judge that the first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body break down；S224, such as
Pressure value described in fruit is less than the preset pressure threshold value, then controls the 3rd heat exchange valve body to close after the second preset time,
And re-execute step S222；S225, if the pressure value is more than or equal to the preset pressure threshold value, judge described
One heat exchange valve body and the second heat exchange valve body break down；S226, if the pressure value is less than the preset pressure threshold value,
Control the first heat exchange valve body to close after second preset time, and re-execute step S222；S227, if described
Pressure value is more than or equal to the preset pressure threshold value, then judges that the second heat exchange valve body breaks down；S228, if described
Pressure value is less than the preset pressure threshold value, then judges that the second heat exchange valve body is in normal operating conditions.
Further, after the step S224, the step S2 also includes：S229, if the pressure value is less than
The preset pressure threshold value, then control the second heat exchange valve body to close after second preset time, and re-execute step
Rapid S222；S22a, if the pressure value is more than or equal to the preset pressure threshold value, judge the first heat exchange valve body hair
Raw failure；S22b, if the pressure value is less than the preset pressure threshold value, judge that the first heat exchange valve body is in normal
Working condition.
To achieve the above object, another aspect of the present invention embodiment also proposed a kind of multiple on-line system, and its execution is above-mentioned
Multiple on-line system in exchange heat valve body fault detection method.
The multiple on-line system of the embodiment of the present invention, by the fault detection method of above-mentioned heat exchange valve body, can effectively it examine
Whether the heat exchange valve body measured in multiple on-line system sends failure, so as to ensure the safe and reliable operation of system.
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.
Fig. 4 is that the failure of the heat exchange valve body of outdoor heat exchanger in the multiple on-line system according to another embodiment of the invention is examined
The flow chart of survey method.
Reference：Compressor 10, outdoor heat exchanger 20, the heat exchange of indoor heat exchanger 30, first valve body 40, the second heat exchange valve
The heat exchange of body the 50, the 3rd valve body 60, outdoor fan 70, indoor fan 80, electric expansion valve 90, the first check valve 100, second are unidirectional
Valve 110, the 3rd check valve 120, pressure sensor 130.
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 check valve are correspondingly arranged to the 3rd check valve on the export pipeline of the first to the 3rd heat exchange unit.
As shown in figure 1, in the multiple on-line system heat exchange valve body of outdoor heat exchanger fault detection method, including following step
Suddenly：
S1, after multiple on-line system receives heat exchange valve physical examination survey instruction, control multiple on-line system enters refrigeration mode, and
Control compressor is run with preset rotation speed.
Specifically, when needing to detect the heat exchange valve body in multiple on-line system, heat exchange valve physical examination is sent first and is surveyed
Instruction is to multiple on-line system, and after multiple on-line system receives heat exchange valve physical examination survey instruction, multiple on-line system is transported in a chiller mode
OK, and compressor is controlled to be run with preset rotation speed, wherein, preset rotation speed can be demarcated according to actual conditions, for example, default
Rotating speed can be the minimum running speed of compressor.
Wherein, as shown in Fig. 2 when multiple on-line system is run in a chiller mode, from the HTHP gas of compressor out
State refrigerant after at least one heat exchange valve body in the first to the 3rd heat exchange valve body by entering outdoor heat exchanger, through outdoor heat exchanger
Become high normal pressure and temperature liquid refrigerants after condensation, high normal pressure and temperature liquid refrigerants becomes low-temp low-pressure after electric expansion valve reducing pressure by regulating flow
Gaseous mixture, become low-temp low-pressure gaseous coolant after being absorbed heat indoors in heat exchanger, finally return to compressor.
S2, control N number of heat exchange valve body to be opened and closed according to default sequential, and obtain the pressure of the exhaust ports of compressor
Value, to judge whether N number of heat exchange valve body breaks down according to pressure value.Wherein it is possible to compressor is obtained by pressure sensor
Exhaust ports pressure value.
Specifically, after compressor is run with preset rotation speed, N number of heat exchange valve body is controlled to open and close according to default sequential
Close, when some heat exchange valve body or certain several heat exchange valve body be in opening when, if the pressure of the exhaust ports of compressor
Force value is too high, then shows that the heat exchange valve body for being currently at opening breaks down.Wherein, default sequential can be gradually to detect
Mode that mode, in groups detection mode or both combine etc..
According to one embodiment of present invention, when N number of heat exchange valve body is the first heat exchange valve body, the second heat exchange valve body and the 3rd
During heat exchange valve body, step S2 is specifically included：The heat exchange valve body of control second and the 3rd heat exchange valve body are closed, and control the first heat exchange valve
Body is opened；The pressure value of the exhaust ports of compressor is obtained after the first preset time, and judges whether pressure value is more than or waits
In preset pressure threshold value；If pressure value is more than or equal to preset pressure threshold value, judge that the first heat exchange valve body breaks down；Such as
Fruit pressure value is less than preset pressure threshold value, then judges that the first heat exchange valve body is in normal operating conditions, wherein, the first preset time
It can be demarcated with preset pressure threshold value according to actual conditions, for example, the first preset time can be 2min, preset pressure threshold
Value can be pressure value when high voltage protective occurs for outdoor unit.
After the completion of judging the first heat exchange valve body, step S2 also includes：The heat exchange valve body of control first and the 3rd heat exchange valve
Body is closed, and controls the second heat exchange valve body to open；The pressure value of the exhaust ports of compressor is obtained after the first preset time, and
Judge whether pressure value is more than or equal to preset pressure threshold value；If pressure value is more than or equal to preset pressure threshold value, judge
Second heat exchange valve body breaks down；If pressure value is less than preset pressure threshold value, judge that the second heat exchange valve body is in normal work
Make state.
After the completion of judging the second heat exchange valve body, step S2 also includes：The heat exchange valve body of control first and the second heat exchange valve
Body is closed, and controls the 3rd heat exchange valve body to open；The pressure value of the exhaust ports of compressor is obtained after the first preset time, and
Judge whether pressure value is more than or equal to preset pressure threshold value；If pressure value is more than or equal to preset pressure threshold value, judge
3rd heat exchange valve body breaks down；If pressure value is less than preset pressure threshold value, judge that the 3rd heat exchange valve body is in normal work
Make state.
Specifically, it is multi-joint as shown in figure 3, after multiple on-line system receives heat exchange valve physical examination survey instruction (step S101)
Machine system enters refrigeration mode, and compressor is run (step S102) with minimum speed.Then the heat exchange of control first valve body opens (step
Rapid S103), and after 2min, judge whether the pressure value P c at exhaust outlet of compressor is more than or equal to preset pressure threshold value A, such as
Fruit Pc >=A, outdoor unit report high voltage protective failure, show that the first heat exchange valve body is not actually opened, the first heat exchange valve body has event
Hinder (step S104-S105)；If Pc ＜ A, outdoor unit do not report high voltage protective failure, then judge that the first heat exchange valve body is in normal
Working condition (step S106-S107).After the detection of the first heat exchange valve body is completed, the heat exchange valve body of control second is in opening state
State (step S108), and the heat exchange of control first valve body closes (step S109) after 5s, is then started pair using same method
Second heat exchange valve body is detected (step S110-S113).After the detection of the second heat exchange valve body is completed, the 3rd heat exchange valve is controlled
Body is in opening (step S114), and the heat exchange of control second valve body closes (step S115) after 5s, then using same
Method start to the 3rd heat exchange valve body detected (step S116-S119), be finally completed heat exchange valve body effective detection.
Wherein, the heat exchange valve body that just control is completed to detect after heat exchange valve body to be detected opens a period of time is closed, example
Such as, the first heat exchange valve body is just controlled to close after the second heat exchange valve body opens 5s, in order to ensure that heat exchange valve body switched
Larger fluctuation will not occur for Cheng Zhong, the pressure value of the exhaust ports of compressor.
It should be strongly noted that in step S104, S106, S110, S112, S116 and S118, when preset pressure threshold
Value A be outdoor unit occur high voltage protective when pressure value when, if the heat exchange valve body for being currently at opening breaks down,
Above or equal to preset pressure threshold value A, now compressor high voltage protective will occur for the pressure value of the exhaust ports of compressor, together
When outdoor unit report high voltage protective failure.It is understood that can also be directly by judging whether outdoor unit reports high voltage protective event
Whether barrier breaks down come the valve body that judges to exchange heat.
The fault detection method of the embodiment of the present invention can be by controlling multiple on-line system to run in a chiller mode, and controls
Compressor is run with preset rotation speed, while the effective detection of heat exchange valve body is completed according to gradually detection mode, and detection method
It is simple and reliable.
According to another embodiment of the invention, when N number of heat exchange valve body is the first heat exchange valve body, the second heat exchange valve body and the
During three heat exchange valve bodies, step S2 is specifically included：S201, the heat exchange of control first valve body, the second heat exchange valve body and the 3rd heat exchange valve body
Open；S202, the pressure value of the exhaust ports of compressor is obtained in the first preset time (such as 2min) afterwards, and judges pressure value
Whether preset pressure threshold value is more than or equal to；S203, if pressure value is more than or equal to preset pressure threshold value, judge that first changes
Thermal valve body, the second heat exchange valve body and the 3rd heat exchange valve body break down；S204, if pressure value is less than preset pressure threshold value,
Then control the first heat exchange valve body to close afterwards in the second preset time (such as 5s), and re-execute step S202；S205, if pressure
Value is more than or equal to preset pressure threshold value, then judges that the second heat exchange valve body and the 3rd heat exchange valve body break down；S206, if
Pressure value is less than preset pressure threshold value, then the heat exchange of control second valve body is closed after the second preset time, and re-executes step
S202；S207, if pressure value is more than or equal to preset pressure threshold value, judge that the 3rd heat exchange valve body breaks down；S208, such as
Fruit pressure value is less than preset pressure threshold value, then judges that the 3rd heat exchange valve body is in normal operating conditions.
Specifically, the embodiment is that the detection of N number of heat exchange valve body is realized using detection mode in groups, i.e., first controls N number of change
Thermal valve body is opened, if after the first preset time of operation, the pressure value of the exhaust ports of compressor is more than or equal to default pressure
Force threshold, then judge N number of heat exchange equal failure of valve body；If the pressure value of the exhaust ports of compressor is less than preset pressure threshold value,
The first heat exchange valve body is then closed after the second preset time, judges that residue is not turned off with the pressure value of the exhaust ports according to compressor
Heat exchange valve body whether break down, if the pressure value of the exhaust ports of compressor is more than or equal to preset pressure threshold value,
Then except the heat exchange valve closed breaks down in vitro, so detection is gone down.
Specifically, it is more as shown in figure 4, after multiple on-line system receives heat exchange valve physical examination survey instruction (step S301)
On-line system enters refrigeration mode, and compressor is run (step S302) with minimum speed.Then the first to the 3rd heat exchange valve is controlled
Body opens (step S303), and after 2min, it is default to judge whether the pressure value P c at exhaust outlet of compressor is more than or equal to
Pressure threshold A, if Pc >=A, outdoor unit report high voltage protective failure, show that the first to the 3rd heat exchange valve body is not actually opened,
Failure (step S304-S305) be present in the first heat exchange valve body to the 3rd heat exchange valve body；If Pc ＜ A, outdoor unit is not offered a high price pressure
Protecting failure, then the heat exchange of control first valve body closes (step S306-S307) after 5s, if Pc >=A, outdoor unit report high voltage protective
Failure, show except the external equal failure of heat exchange valve body of the first heat exchange valve, i.e., the second heat exchange valve body and the 3rd heat exchange valve body occur
Failure (step S308-S309)；If Pc ＜ A, outdoor unit do not report high voltage protective failure, then continue next group of judgement, specifically sentence
Disconnected process such as step S311-315, is not detailed herein.
Further, after step s 204, step S2 also includes：S209, if pressure value is less than preset pressure threshold value,
Then the heat exchange of control the 3rd valve body is closed after the second preset time, and re-executes step S202；S20a, if pressure value is more than
Or equal to preset pressure threshold value, then judge that the second heat exchange valve body breaks down；S20b, if pressure value is less than preset pressure threshold
Value, then judge that the second heat exchange valve body is in normal operating conditions.
Specifically, when using detection mode in groups, multiple heat exchange valve bodies can be detected faster while event occurs
The situation of barrier, for example, when N number of heat exchange valve body breaks down, one-time detection is only needed to judge that N number of heat exchange valve body is sent out
Raw failure, but the situation that multiple heat exchange valve bodies break down simultaneously might not be more, therefore, detected using which
When, detection mode can be combined gradually to realize the fast and effective detection of N number of heat exchange valve body.For example, judging the 3rd heat exchange valve
After whether body breaks down, the inspection to the second heat exchange valve body is completed by the heat exchange valve body of switching the 3rd and the second heat exchange valve body
Survey, specific detection process is not detailed herein.
According to still another embodiment of the invention, when N number of heat exchange valve body is the first heat exchange valve body, the second heat exchange valve body and the
During three heat exchange valve bodies, step S2 is specifically included：S211, the heat exchange of control first valve body, the second heat exchange valve body and the 3rd heat exchange valve body
Open；S212, obtains the pressure value of the exhaust ports of compressor after the first preset time, and judges whether pressure value is more than
Or equal to preset pressure threshold value；S213, if pressure value is more than or equal to preset pressure threshold value, judge first heat exchange valve body,
Second heat exchange valve body and the 3rd heat exchange valve body break down；S214, if pressure value is less than preset pressure threshold value, second
The heat exchange of control second valve body is closed after preset time, and re-executes step S212；S215, if pressure value is more than or equal in advance
If pressure threshold, then judge that the first heat exchange valve body and the 3rd heat exchange valve body break down；S216, preset if pressure value is less than
Pressure threshold, then the heat exchange of control the 3rd valve body is closed after the second preset time, and re-executes step S212；S217, if
Pressure value is more than or equal to preset pressure threshold value, then judges that the first heat exchange valve body breaks down；S218, if pressure value is less than in advance
If pressure threshold, then judge that the first heat exchange valve body is in normal operating conditions.
After step S214, step S2 also includes：S219, if pressure value is less than preset pressure threshold value, second
The heat exchange of control first valve body is closed after preset time, and re-executes step S212；S21a, if pressure value is more than or equal in advance
If pressure threshold, then judge that the 3rd heat exchange valve body breaks down；S21b, if pressure value is less than preset pressure threshold value, judge
3rd heat exchange valve body is in normal operating conditions.
Specific detection process is similar to Fig. 4, is not detailed herein.
According to still a further embodiment, when N number of heat exchange valve body is the first heat exchange valve body, the second heat exchange valve body and the
During three heat exchange valve bodies, step S2 is specifically included：S221, the heat exchange of control first valve body, the second heat exchange valve body and the 3rd heat exchange valve body
Open；S222, obtains the pressure value of the exhaust ports of compressor after the first preset time, and judges whether pressure value is more than
Or equal to preset pressure threshold value；S223, if pressure value is more than or equal to preset pressure threshold value, judge first heat exchange valve body,
Second heat exchange valve body and the 3rd heat exchange valve body break down；S224, if pressure value is less than preset pressure threshold value, second
The heat exchange of control the 3rd valve body is closed after preset time, and re-executes step S222；S225, if pressure value is more than or equal in advance
If pressure threshold, then judge that the first heat exchange valve body and the second heat exchange valve body break down；S226, preset if pressure value is less than
Pressure threshold, then the heat exchange of control first valve body is closed after the second preset time, and re-executes step S222；S227, if
Pressure value is more than or equal to preset pressure threshold value, then judges that the second heat exchange valve body breaks down；S228, if pressure value is less than in advance
If pressure threshold, then judge that the second heat exchange valve body is in normal operating conditions.
After step S224, step S2 also includes：S229, if pressure value is less than preset pressure threshold value, second
The heat exchange of control second valve body is closed after preset time, and re-executes step S222；S22a, if pressure value is more than or equal in advance
If pressure threshold, then judge that the first heat exchange valve body breaks down；S22b, if pressure value is less than preset pressure threshold value, judge
First heat exchange valve body is in normal operating conditions.
Specific detection process is similar to Fig. 4, is not detailed herein.
It is understood that in an embodiment of the present invention, can use gradually detection mode, in groups detection mode, into
The mode that detection mode is combined with gradually detection mode, or other control modes are organized to complete the effective of all heat exchange valve bodies
Detection, specific detection mode have a variety of, and are difficult to enumerate, therefore are not detailed herein.
In summary, in multiple on-line system according to embodiments of the present invention exchange heat valve body fault detection method, multi-joint
Machine system receive heat exchange valve physical examination survey instruction after, first control multiple on-line system enter refrigeration mode, and control compressor with
Preset rotation speed is run, and then controls N number of heat exchange valve body to be opened and closed according to default sequential, and obtain the exhaust ports of compressor
Pressure value, with according to pressure value judge it is N number of heat exchange valve body whether break down, so as to realize it is N number of heat exchange valve body effective inspection
Survey, and then ensure the safe and reliable operation of system.
To achieve the above object, another aspect of the present invention embodiment also proposed a kind of multiple on-line system, and its execution is above-mentioned
Multiple on-line system in exchange heat valve body fault detection method.
The multiple on-line system of the embodiment of the present invention, by the fault detection method of above-mentioned heat exchange valve body, can effectively it examine
Whether the heat exchange valve body measured in multiple on-line system sends failure, so as to ensure the safe and reliable operation of system.
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 (11)
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, the multiple on-line system is controlled to enter refrigeration mould
Formula, and control the compressor to be run with preset rotation speed；
S2, control N number of heat exchange valve body to be opened and closed according to default sequential, and obtain the pressure of the exhaust ports of the compressor
Value, and when the pressure value is more than or equal to preset pressure threshold value, judge that N number of heat exchange valve body breaks down.
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, when N number of heat exchange valve body is the first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body, the step
S2 is specifically included：
Control the second heat exchange valve body and the 3rd heat exchange valve body to close, and control the first heat exchange valve body to open；
The pressure value of the exhaust ports of the compressor is obtained after the first preset time, and judges whether the pressure value is more than
Or equal to the preset pressure threshold value；
If the pressure value is more than or equal to the preset pressure threshold value, judge that the first heat exchange valve body breaks down；
If the pressure value is less than the preset pressure threshold value, judge that the first heat exchange valve body is in normal work shape
State.
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 that after the completion of judging the described first heat exchange valve body, the step S2 also includes：
Control the first heat exchange valve body and the 3rd heat exchange valve body to close, and control the second heat exchange valve body to open；
The pressure value of the exhaust ports of the compressor is obtained after first preset time, and whether judges the pressure value
More than or equal to the preset pressure threshold value；
If the pressure value is more than or equal to the preset pressure threshold value, judge that the second heat exchange valve body breaks down；
If the pressure value is less than the preset pressure threshold value, judge that the second heat exchange valve body is in normal work shape
State.
4. the fault detection method of the heat exchange valve body of outdoor heat exchanger in multiple on-line system according to claim 3, it is special
Sign is that after the completion of judging the described second heat exchange valve body, the step S2 also includes：
Control the first heat exchange valve body and the second heat exchange valve body to close, and control the 3rd heat exchange valve body to open；
The pressure value of the exhaust ports of the compressor is obtained after first preset time, and whether judges the pressure value
More than or equal to the preset pressure threshold value；
If the pressure value is more than or equal to the preset pressure threshold value, judge that the 3rd heat exchange valve body breaks down；
If the pressure value is less than the preset pressure threshold value, judge that the 3rd heat exchange valve body is in normal work shape
State.
5. 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, when N number of heat exchange valve body is the first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body, the step
S2 is specifically included：
S201, control the first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body are opened；
S202, obtains the pressure value of the exhaust ports of the compressor after the first preset time, and judges that the pressure value is
It is no to be more than or equal to preset pressure threshold value；
S203, if the pressure value is more than or equal to the preset pressure threshold value, judge the first heat exchange valve body, second
Heat exchange valve body and the 3rd heat exchange valve body break down；
S204, if the pressure value is less than the preset pressure threshold value, described first is controlled to change after the second preset time
Thermal valve body is closed, and re-executes step S202；
S205, if the pressure value is more than or equal to the preset pressure threshold value, judge the second heat exchange valve body and the
Three heat exchange valve bodies break down；
S206, if the pressure value is less than the preset pressure threshold value, described is controlled after second preset time
Two heat exchange valve bodies are closed, and re-execute step S202；
S207, if the pressure value is more than or equal to the preset pressure threshold value, judge that the described 3rd exchanges heat valve body
Failure；
S208, if the pressure value is less than the preset pressure threshold value, judge that the 3rd heat exchange valve body is in normal work
Make state.
6. the fault detection method of the heat exchange valve body of outdoor heat exchanger in multiple on-line system according to claim 5, it is special
Sign is, after the step S204, the step S2 also includes：
S209, if the pressure value is less than the preset pressure threshold value, described is controlled after second preset time
Three heat exchange valve bodies are closed, and re-execute step S202；
S20a, if the pressure value is more than or equal to the preset pressure threshold value, judge that described second exchanges heat valve body
Failure；
S20b, if the pressure value is less than the preset pressure threshold value, judge that the second heat exchange valve body is in normal work
Make state.
7. 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, when N number of heat exchange valve body is the first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body, the step
S2 is specifically included：
S211, control the first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body are opened；
S212, obtains the pressure value of the exhaust ports of the compressor after the first preset time, and judges that the pressure value is
It is no to be more than or equal to preset pressure threshold value；
S213, if the pressure value is more than or equal to the preset pressure threshold value, judge the first heat exchange valve body, second
Heat exchange valve body and the 3rd heat exchange valve body break down；
S214, if the pressure value is less than the preset pressure threshold value, described second is controlled to change after the second preset time
Thermal valve body is closed, and re-executes step S212；
S215, if the pressure value is more than or equal to the preset pressure threshold value, judge the first heat exchange valve body and the
Three heat exchange valve bodies break down；
S216, if the pressure value is less than the preset pressure threshold value, described is controlled after second preset time
Three heat exchange valve bodies are closed, and re-execute step S212；
S217, if the pressure value is more than or equal to the preset pressure threshold value, judge that described first exchanges heat valve body
Failure；
S218, if the pressure value is less than the preset pressure threshold value, judge that the first heat exchange valve body is in normal work
Make state.
8. the fault detection method of the heat exchange valve body of outdoor heat exchanger in multiple on-line system according to claim 7, it is special
Sign is, after the step S214, the step S2 also includes：
S219, if the pressure value is less than the preset pressure threshold value, described is controlled after second preset time
One heat exchange valve body is closed, and re-executes step S212；
S21a, if the pressure value is more than or equal to the preset pressure threshold value, judge that the described 3rd exchanges heat valve body
Failure；
S21b, if the pressure value is less than the preset pressure threshold value, judge that the 3rd heat exchange valve body is in normal work
Make state.
9. 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, when N number of heat exchange valve body is the first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body, the step
S2 is specifically included：
S221, control the first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body are opened；
S222, obtains the pressure value of the exhaust ports of the compressor after the first preset time, and judges that the pressure value is
It is no to be more than or equal to preset pressure threshold value；
S223, if the pressure value is more than or equal to the preset pressure threshold value, judge the first heat exchange valve body, second
Heat exchange valve body and the 3rd heat exchange valve body break down；
S224, if the pressure value is less than the preset pressure threshold value, the described 3rd is controlled to change after the second preset time
Thermal valve body is closed, and re-executes step S222；
S225, if the pressure value is more than or equal to the preset pressure threshold value, judge the first heat exchange valve body and the
Two heat exchange valve bodies break down；
S226, if the pressure value is less than the preset pressure threshold value, described is controlled after second preset time
One heat exchange valve body is closed, and re-executes step S222；
S227, if the pressure value is more than or equal to the preset pressure threshold value, judge that described second exchanges heat valve body
Failure；
S228, if the pressure value is less than the preset pressure threshold value, judge that the second heat exchange valve body is in normal work
Make state.
10. the fault detection method of the heat exchange valve body of outdoor heat exchanger in multiple on-line system according to claim 9, it is special
Sign is, after the step S224, the step S2 also includes：
S229, if the pressure value is less than the preset pressure threshold value, described is controlled after second preset time
Two heat exchange valve bodies are closed, and re-execute step S222；
S22a, if the pressure value is more than or equal to the preset pressure threshold value, judge that described first exchanges heat valve body
Failure；
S22b, if the pressure value is less than the preset pressure threshold value, judge that the first heat exchange valve body is in normal work
Make state.
11. a kind of multiple on-line system, it is characterised in that perform the multiple on-line system according to any one of claim 1-10
The fault detection method of the heat exchange valve body of middle outdoor heat exchanger.
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| CN106247530B (en) * | 2016-07-29 | 2019-05-21 | 海信（山东）空调有限公司 | More air-conditioning self checking methods are dragged in multitube frequency conversion one |
| CN106369697A (en) * | 2016-08-19 | 2017-02-01 | 广东美的暖通设备有限公司 | Multi-split system and failure detection method for main flow path valve body assembly of multi-split system |
| CN109798636B (en) * | 2019-01-08 | 2021-05-04 | 广东美的暖通设备有限公司 | Method and device for detecting reverse connection of heat exchangers of multi-split air conditioning system |
| CN111486612A (en) * | 2020-04-29 | 2020-08-04 | 广东美的暖通设备有限公司 | Multi-split air conditioning system, heating valve leakage detection method and device thereof, and storage medium |
| CN112503723B (en) * | 2020-12-08 | 2021-10-08 | 合肥美的暖通设备有限公司 | Valve body detection method, air conditioning apparatus, and readable storage medium |
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