CN105299991B - The fault detection method of multiple on-line system and its antifreeze valve body - Google Patents
The fault detection method of multiple on-line system and its antifreeze valve body Download PDFInfo
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- CN105299991B CN105299991B CN201510770426.XA CN201510770426A CN105299991B CN 105299991 B CN105299991 B CN 105299991B CN 201510770426 A CN201510770426 A CN 201510770426A CN 105299991 B CN105299991 B CN 105299991B
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Abstract
The invention discloses a kind of fault detection method of antifreeze valve body in multiple on-line system, comprise the following steps：After multiple on-line system receives frost valve physical examination survey instruction, control multiple on-line system enters test running heating mode；Control compressor is run with predeterminated frequency, and only controls antifreeze valve body to be in opening；And the temperature value of the porch of gas-liquid separator is obtained, and judge whether antifreeze valve body breaks down according to temperature value.This method can conveniently and the effective antifreeze valve body that detect to be connected with the anti-freeze coil pipe of outdoor heat exchanger whether normal work, so as to which effective anti-locking system causes outdoor heat exchanger to damage during defrost because of the defrosting water freezing and expansion of outdoor heat exchanger, and then ensure the safe and reliable operation of multiple on-line 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 antifreeze valve body in more particularly to a kind of multiple on-line system
A kind of and multiple on-line system.
Background technology
Generally, anti-freeze coil pipe is provided with the outdoor heat exchanger of multiple on-line system, when multiple on-line system is with defrost pattern
During operation, the heat exchanging pipe being made up of anti-freeze coil pipe is to heat the defrosting water flow down from top outdoor heat exchanger, to protect
Card defrosting water be heated to it is above freezing, so as to effectively preventing from causing outdoor heat exchanger to damage because of defrosting water freezing and expansion.
But when antifreeze valve body breaks down, for example, because the welding slag in welding procedure is wandered to inside heat exchanging pipe
Or be blocked in because longtime running causes metal fragment to be peeled off from tube wall in antifreeze valve body, the defrost of outdoor heat exchanger will be caused
Water can not be heated to by the stream that exchanges heat it is above freezing so that defrosting water freezing and expansion and damage outdoor heat exchanger, and then
Cause system can not normal operation.
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
Whether one purpose is in proposing a kind of can conveniently and effectively detect antifreeze valve body in the multiple on-line system of normal work
The fault detection method of antifreeze valve body.
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 of antifreeze valve body in multiple on-line system
Detection method, the multiple on-line system include compressor, outdoor heat exchanger and gas-liquid separator, and the outdoor heat exchanger includes anti-
Freeze coil pipe, the exhaust outlet of the compressor is connected by the antifreeze valve body with the anti-freeze coil pipe, the compressor
Gas returning port is connected with the outlet of the gas-liquid separator, and the fault detection method comprises the following steps：In the multi-connected machine system
After system receives frost valve physical examination survey instruction, the multiple on-line system is controlled to enter test running heating mode；Control the compression
Machine is run with predeterminated frequency, and only controls the antifreeze valve body to be in opening；And obtain entering for the gas-liquid separator
Temperature value at mouthful, and judge whether the antifreeze valve body breaks down according to the temperature value.
The fault detection method of antifreeze valve body in multiple on-line system according to embodiments of the present invention, received in multiple on-line system
After surveying instruction to frost valve physical examination, control multiple on-line system to enter test running heating mode first, and control compressor with default
Frequency is run, and only controls antifreeze valve body to be in opening, then obtains the temperature value of the porch of gas-liquid separator, and root
Judge whether antifreeze valve body breaks down according to temperature value.It is anti-with outdoor heat exchanger thereby, it is possible to detect conveniently and effectively
Freeze the connected antifreeze valve body of coil pipe whether normal work, so as to effective anti-locking system during defrost because of outdoor heat exchanger
Defrosting water freezing and expansion and cause outdoor heat exchanger to damage, and then ensure the safe and reliable operation of multiple on-line system.
In addition, can also be had according to the fault detection method of antifreeze valve body in the above-mentioned multiple on-line system of the present invention following attached
The technical characteristic added：
In one embodiment of the invention, it is described to judge whether the antifreeze valve body occurs event according to the temperature value
Barrier, is specifically included：Judge whether the temperature value is in persistently to reduce state；And if the temperature value is in persistently to reduce shape
State, then judge that the antifreeze valve body breaks down.
In another embodiment of the present invention, it is described to judge whether the antifreeze valve body occurs event according to the temperature value
Barrier, is specifically included：The return-air degree of superheat of the porch of the gas-liquid separator is calculated according to the temperature value, and judges described return
Whether the gas degree of superheat is less than the default degree of superheat；And if the return-air degree of superheat is less than the default degree of superheat, then judge institute
Antifreeze valve body is stated to break down.
In one embodiment of the invention, the return-air mistake of the porch of the gas-liquid separator is calculated by below equation
Temperature：
ACSH=T1-Te,
Wherein, ACSH is the return-air degree of superheat of the porch of the gas-liquid separator, and T1 is entering for the gas-liquid separator
Temperature value at mouthful, Te are the saturation temperature corresponding to the pressure of the return-air refrigerant of the compressor.
In yet another embodiment of the present invention, it is described to judge whether the antifreeze valve body occurs event according to the temperature value
Barrier, is specifically included：Judge whether the compressor occurs high voltage protective according to the temperature value；And if the compressor is sent out
The raw high voltage protective, then judge that the antifreeze valve body breaks down.
In one embodiment of the invention, the predeterminated frequency is less than or equal to 20Hz.
To achieve the above object, another aspect of the present invention embodiment proposes a kind of multiple on-line system, including compressor, room
External heat exchanger and gas-liquid separator, the outdoor heat exchanger include anti-freeze coil pipe, and the exhaust outlet of the compressor passes through described
Antifreeze valve body is connected with the anti-freeze coil pipe, and the gas returning port of the compressor is connected with the outlet of the gas-liquid separator, institute
Stating multiple on-line system also includes：Temperature acquisition module, the temperature value of the porch for obtaining the gas-liquid separator；Control mould
Block, the control module are connected with the compressor, the antifreeze valve body and the temperature acquisition module respectively, the control
Module controls the multiple on-line system to enter test running heating mode, and control institute after receiving frost valve physical examination and surveying instruction
State compressor to run with predeterminated frequency, and only control the antifreeze valve body to be in opening, the control module is according to institute
State temperature value and judge whether the antifreeze valve body breaks down.
Multiple on-line system according to embodiments of the present invention, control module is after receiving frost valve physical examination and surveying instruction, control
Multiple on-line system is run with test running heating mode, and controls compressor to be run with predeterminated frequency, and only controls antifreeze valve body
Temperature value judgement in opening, the then porch for the gas-liquid separator that control module obtains according to temperature acquisition module
Whether antifreeze valve body breaks down.Thereby, it is possible to conveniently and effectively detect to be connected with the anti-freeze coil pipe of outdoor heat exchanger
Antifreeze valve body whether normal work, so as to which effective defrost water freezing of the anti-locking system because of outdoor heat exchanger during defrost is swollen
It is swollen and cause outdoor heat exchanger to damage, and then ensure the safe and reliable operation of multiple on-line system.
In addition, technical characteristic additional as follows can also be had according to the above-mentioned multiple on-line system of the present invention：
In one embodiment of the invention, the control module is judging that the antifreeze valve body is according to the temperature value
It is not no when breaking down, wherein, whether the control module judges the temperature value in persistently reducing state, and in the temperature value
During in lasting reduction state, judge that the antifreeze valve body breaks down.
In another embodiment of the present invention, above-mentioned multiple on-line system also includes：Computing module, the computing module root
The return-air degree of superheat of the porch of the gas-liquid separator is calculated according to the temperature value, wherein, described in the control module judgement
Whether the return-air degree of superheat is less than the default degree of superheat, and when the return-air degree of superheat is less than the default degree of superheat, described in judgement
Antifreeze valve body breaks down.
In one embodiment of the invention, the computing module calculates entering for the gas-liquid separator by below equation
The return-air degree of superheat at mouthful：
ACSH=T1-Te,
Wherein, ACSH is the return-air degree of superheat of the porch of the gas-liquid separator, and T1 is entering for the gas-liquid separator
Temperature value at mouthful, Te are the saturation temperature corresponding to the pressure of the return-air refrigerant of the compressor.
In yet another embodiment of the present invention, the control module is judging the antifreeze valve body according to the temperature value
When whether breaking down, wherein, the control module judges whether the compressor occurs high voltage protective according to the temperature value,
And when the high voltage protective occurs for the compressor, judge that the antifreeze valve body breaks down.
In one embodiment of the invention, the predeterminated frequency is less than or equal to 20Hz.
The advantages of aspect that the present invention adds, will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
Fig. 1 is the flow of the fault detection method of antifreeze valve body in multiple on-line system according to an embodiment of the invention
Figure.
Fig. 2 is refrigerant flow graph when multiple on-line system according to an embodiment of the invention is in defrost pattern.
Fig. 3 is cold medium flux figure when multiple on-line system according to an embodiment of the invention is in heating mode.
Fig. 4 is that multiple on-line system according to an embodiment of the invention is in test running heating mode and only opens frost valve
Cold medium flux figure during body.
Fig. 5 is the flow of the fault detection method of antifreeze valve body in multiple on-line system in accordance with another embodiment of the present invention
Figure.
Fig. 6 is the flow of the fault detection method of antifreeze valve body in the multiple on-line system according to another embodiment of the invention
Figure.
Fig. 7 is the flow of the fault detection method of antifreeze valve body in multiple on-line system according to further embodiment of the present invention
Figure.
Fig. 8 is the block diagram of multiple on-line system according to an embodiment of the invention.
Fig. 9 is the block diagram of multiple on-line system in accordance with another embodiment of the present invention.
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.
Examined with reference to the accompanying drawings to describe the failure of antifreeze valve body in the multiple on-line system proposed according to embodiments of the present invention
Survey method and multiple on-line system.
Fig. 1 is the flow of the fault detection method of antifreeze valve body in multiple on-line system according to an embodiment of the invention
Figure.In an embodiment of the present invention, multiple on-line system includes compressor, outdoor heat exchanger, gas-liquid separator and antifreeze valve body, room
External heat exchanger includes anti-freeze coil pipe, and the exhaust outlet of compressor is connected by antifreeze valve body with anti-freeze coil pipe, and compressor returns
Gas port is connected with the outlet of gas-liquid separator.Wherein, antifreeze valve body can be magnetic valve.
Specifically, as shown in Figures 2 and 3, multiple on-line system can include compressor 10, outdoor heat exchanger 20, gas-liquid point
From device 30, antifreeze valve body 40, four-way valve 50, indoor heat exchanger 60, electric expansion valve 70, magnetic valve 81,82 and 83 and unidirectional
Valve 91-97.The exhaust outlet of compressor 10 is connected with the first end of four-way valve 50 and one end of antifreeze valve body 40 respectively, four-way valve 50
The second end by being connected after indoor heat exchanger 60 with one end of electric expansion valve 70, the other end of electric expansion valve 70 respectively with
The outlet of the entrance of check valve 97, the entrance of check valve 96 and check valve 95 is connected, the outlet of check valve 97 respectively with unidirectionally
The outlet of valve 91 and the magnetic valve 81,82 being correspondingly arranged on the entrance pipe of outdoor heat exchanger 20 are connected with 83, check valve 96
Outlet be connected respectively with the 3rd end of four-way valve 50 and the entrance of check valve 91, the entrance of check valve 95 respectively with anti-freeze disk
The other end of pipe 21 and the check valve 92,93 being correspondingly arranged on the export pipeline of outdoor heat exchanger 20 are connected with 94, four-way
4th end of valve 50 is connected with the entrance of gas-liquid separator 30, the outlet of gas-liquid separator 30 and the gas returning port phase of compressor 10
Even.
When multiple on-line system is run with defrost pattern, as shown in Fig. 2 the high pressure gaseous refrigerant that compressor 10 comes out
A part is become by entering outdoor heat exchanger 20 after check valve 91, magnetic valve 81,82 and 83 after the condensation of outdoor heat exchanger 20
High normal pressure and temperature liquid refrigerants, high normal pressure and temperature liquid refrigerants become low-pressure low-temperature gas-liquid mixed after the reducing pressure by regulating flow of electric expansion valve 70
Thing, become low-pressure low-temperature gaseous coolant after being absorbed heat indoors in heat exchanger 60, after the separation of gas-liquid separator 30, final low pressure is low
Warm gaseous coolant returns to the gas returning port of compressor 10, meanwhile, another part high temperature and high pressure gas refrigerant come out from compressor 10
Enter the anti-freeze coil pipe 21 of outdoor heat exchanger 20 after antifreeze valve body 40, to enter to the defrosting water flowed down from outdoor heat exchanger 20
Row heating, ensures that the temperature of defrosting water is higher than freezing point, so as to effectively prevent defrosting water freezing and expansion and damage outdoor heat exchanger 20,
And then multiple on-line system is effectively ensured being capable of safe and stable operation.
But during multiple on-line system defrost, if antifreeze valve body breaks down, for example, due in welding procedure
Welding slag wander to being blocked in antifreeze valve body inside heat exchanging pipe or because of longtime running so that metal fragment is peeled off from tube wall
In so that the high temperature and high pressure gas refrigerant come out from compressor can not be by anti-freeze coil pipe, so as to be carried out to defrosting water
Heating, causes defrosting water freezing and expansion, it is therefore desirable to carries out effective detection to antifreeze valve body.Therefore, embodiments of the invention carry
A kind of fault detection method of antifreeze valve body in multiple on-line system is gone out.
As shown in figure 1, the fault detection method of antifreeze valve body comprises the following steps in multiple on-line system：
S1, after multiple on-line system receives frost valve physical examination survey instruction, control multiple on-line system heats into test running
Pattern.
S2, control compressor is run with predeterminated frequency, and only controls antifreeze valve body to be in opening.Wherein, frequency is preset
Rate is less than or equal to 20Hz.
Specifically, as shown in figure 3, when multiple on-line system is run with heating mode, the high temperature come out from compressor 10 is high
Pressure gaseous coolant becomes high normal pressure and temperature liquid refrigerants after the condensation of indoor heat exchanger 60, becomes after the reducing pressure by regulating flow of electric expansion valve 70
Into low-pressure low-temperature gas-liquid mixture, outdoor heat exchanger 20 is then entered by check valve 97, magnetic valve 81,82 and 83, in outdoor
Become low-pressure low-temperature gaseous coolant after being absorbed heat in heat exchanger 20, then by entering gas after check valve 95 and 96 and four-way valve 50
Liquid/gas separator 30, after the separation of gas-liquid separator 30, low-temp low-pressure gaseous coolant returns to the gas returning port of compressor 10, so as to complete
The once heating circulation of multiple on-line system.
After multiple on-line system receives frost valve physical examination survey instruction, multiple on-line system enters test running heating mode, pressure
Contracting machine is run with low frequency (such as frequency is less than 20Hz), now if only controlling antifreeze valve body to be in opening, such as Fig. 4 institutes
Showing, the high pressure gaseous refrigerant come out from compressor directly enters gas-liquid separator by antifreeze valve body and anti-freeze coil pipe,
Then the gas returning port of compressor is returned after gas-liquid separator separates.When compressor continuous service, come out due to compressor
High pressure gaseous refrigerant is exchanged heat without outdoor heat exchanger, indoor heat exchanger and electric expansion valve or reducing pressure by regulating flow,
But compressor is directly returned to by anti-freeze coil pipe and gas-liquid separator, and therefore, when antifreeze valve body normal work, gas-liquid point
Temperature from device porch will continue to increase, now can be by the temperature value to gas-liquid separator porch come effective detection
Whether antifreeze valve body breaks down.
It should be noted that the multiple on-line system shown in Fig. 2-Fig. 4 is only one embodiment of the present of invention, will pass through this
Embodiment clearer can illustrate to the present invention.
S3, the temperature value of the porch of gas-liquid separator is obtained, and judge whether antifreeze valve body occurs event according to temperature value
Barrier.
In one embodiment of the invention, judge whether antifreeze valve body breaks down according to temperature value, specifically include：Sentence
Whether disconnected temperature value is in persistently to reduce state；And if temperature value in state is persistently reduced, then judges that event occurs for antifreeze valve body
Barrier.
Specifically, after multiple on-line system, which receives frost valve physical examination, surveys instruction, control multiple on-line system enters test running
Heating mode, compressor is run with predeterminated frequency (such as 20Hz), and only controls antifreeze valve body to be in opening, so that compressor
High pressure gaseous refrigerant out directly returns to compressor by anti-freeze coil pipe and gas-liquid separator.In compressor operating mistake
Cheng Zhong, the temperature value for detecting gas-liquid separator porch in real time simultaneously judged it, when temperature value is in continue increasing state, then
Judge that antifreeze valve body does not break down；When temperature value is in persistently reducing state, then judge that antifreeze valve body breaks down, so as to realize
Fast and effective detection to antifreeze valve body, so that related personnel can change antifreeze valve body in time, effectively prevent because of antifreeze valve body
Failure the defrosting water during defrost can not be carried out heating so that defrosting water freezing and expansion and damage outdoor heat exchanger, Jin Erbao
Card system being capable of safe and reliable operation.
Further, as shown in figure 5, the fault detection method of antifreeze valve body can include following step in multiple on-line system
Suddenly：
S101, multiple on-line system receive frost valve physical examination and survey instruction.
S102, multiple on-line system enters test running heating mode, compressor low frequency (such as 20Hz) operating, and only opens antifreeze
Valve body.
S103, after 1 minute, judge whether T1 persistently reduces, wherein, T1 is the temperature value of the porch of gas-liquid separator.
If it is, perform step S104；If not, perform step S105.
S104, antifreeze valve body break down.
S105, judges whether T1 continues to increase.If it is, perform step S106.
S106, antifreeze valve body do not break down, i.e., antifreeze valve body is in good condition.
In another embodiment of the present invention, judge whether antifreeze valve body breaks down according to temperature value, specifically include：
The return-air degree of superheat of the porch of gas-liquid separator is calculated according to temperature value, and judges whether the return-air degree of superheat is less than default overheat
Degree；And if the return-air degree of superheat is less than the default degree of superheat, then judge that antifreeze valve body breaks down.Wherein, the default degree of superheat can
To be demarcated according to actual conditions, such as the default degree of superheat can be 3 DEG C.
In one embodiment of the invention, returning for the porch of gas-liquid separator can be calculated by following formula (1)
The gas degree of superheat：
ACSH=T1-Te (1)
Wherein, ACSH is the return-air degree of superheat of the porch of gas-liquid separator, and T1 is the temperature of the porch of gas-liquid separator
Angle value, Te are the saturation temperature corresponding to the pressure of the return-air refrigerant of compressor.
Specifically, in an embodiment of the present invention, can be according to the change of the return-air degree of superheat of the porch of gas-liquid separator
Change trend judges whether antifreeze valve body breaks down.Specifically, as shown in fig. 6, in multiple on-line system antifreeze valve body event
Barrier detection method may comprise steps of：
S201, multiple on-line system receive frost valve physical examination and survey instruction.
S202, multiple on-line system enters test running heating mode, compressor low frequency (such as 20Hz) operating, and only opens antifreeze
Valve body.
S203, after 1 minute, judge the porch of gas-liquid separator return-air degree of superheat ASCH=T1-Te whether be less than or
Equal to T3 DEG C.If it is, perform step S204；If not, perform step S205.
S204, antifreeze valve body break down.
S205, judges whether the return-air degree of superheat ASCH=T1-Te of the porch of gas-liquid separator persistently increases.If
It is to perform step S206.
S206, antifreeze valve body do not break down.
In yet another embodiment of the present invention, judge whether antifreeze valve body breaks down according to temperature value, specifically include：
Judge whether compressor occurs high voltage protective according to temperature value；And if high voltage protective occurs for compressor, then judge frost valve
Body breaks down.
It should be noted that due to only opening antifreeze valve body so that multiple on-line system only has a path, when antifreeze valve body
During failure, high voltage protective will occur for multiple on-line system, thus whether can be occurred by multiple on-line system high voltage protective come
Judge whether antifreeze valve body breaks down.Specifically, as shown in fig. 7, in multiple on-line system antifreeze valve body fault detect side
Method may comprise steps of：
S301, multiple on-line system receive frost valve physical examination and survey instruction.
S302, multiple on-line system enters test running heating mode, compressor low frequency (such as 20Hz) operating, and only opens antifreeze
Valve body.
S303, after 1 minute, judge whether multiple on-line system occurs high voltage protective.If it is, perform step S304；If
It is no, perform step S305.
S304, antifreeze valve body break down.
S305, antifreeze valve body do not break down.
To sum up, in an embodiment of the present invention, after multiple on-line system receives frost valve physical examination survey instruction, can pass through
Judge the temperature value of the porch of gas-liquid separator, gas-liquid separator porch return-air super heat value or multiple on-line system be
It is no that high voltage protective occurs to confirm whether antifreeze valve body breaks down, so that related personnel changes the frost valve to break down in time
Body, so as to ensure the safe and reliable operation of multiple on-line system.
The fault detection method of antifreeze valve body in multiple on-line system according to embodiments of the present invention, received in multiple on-line system
After surveying instruction to frost valve physical examination, control multiple on-line system enters test running heating mode, and controls compressor with predeterminated frequency
Operation, and only control antifreeze valve body to be in opening, the temperature value of the porch of gas-liquid separator is obtained, with according to temperature value
Judge whether antifreeze valve body breaks down.Thereby, it is possible to the convenient and effective anti-freeze coil pipe detected with outdoor heat exchanger
Connected antifreeze valve body whether normal work, so as to effective anti-locking system during defrost because of the defrosting water knot of outdoor heat exchanger
Ice expands and causes outdoor heat exchanger to damage, and then ensures the safe and reliable operation of multiple on-line system.
Below in conjunction with the accompanying drawings come describe the embodiment of the present invention proposition multiple on-line system.
In an embodiment of the present invention, as shown in Figure 2 or Figure 3, multiple on-line system includes compressor 10, outdoor heat exchanger
20th, gas-liquid separator 30 and antifreeze valve body 40, outdoor heat exchanger 20 include anti-freeze coil pipe 21, and the exhaust outlet of compressor 10 passes through
Antifreeze valve body 40 is connected with anti-freeze coil pipe 21, and the gas returning port of compressor 10 is connected with the outlet of gas-liquid separator 30.Wherein, prevent
It can be magnetic valve to freeze valve body 40.
Specifically, as shown in Figures 2 and 3, multiple on-line system can include compressor 10, outdoor heat exchanger 20, gas-liquid point
From device 30, antifreeze valve body 40, four-way valve 50, indoor heat exchanger 60, electric expansion valve 70, magnetic valve 81,82 and 83 and unidirectional
Valve 91-97.The exhaust outlet of compressor 10 is connected with the first end of four-way valve 50 and one end of antifreeze valve body 40 respectively, four-way valve 50
The second end by being connected after indoor heat exchanger 60 with one end of electric expansion valve 70, the other end of electric expansion valve 70 respectively with
The outlet of the entrance of check valve 97, the entrance of check valve 96 and check valve 95 is connected, the outlet of check valve 97 respectively with unidirectionally
The outlet of valve 91 and the magnetic valve 81,82 being correspondingly arranged on the entrance pipe of outdoor heat exchanger 20 are connected with 83, check valve 96
Outlet be connected respectively with the 3rd end of four-way valve 50 and the entrance of check valve 91, the entrance of check valve 95 respectively with anti-freeze disk
The other end of pipe 21 and the check valve 92,93 being correspondingly arranged on the export pipeline of outdoor heat exchanger 20 are connected with 94, four-way
4th end of valve 50 is connected with the entrance of gas-liquid separator 30, the outlet of gas-liquid separator 30 and the gas returning port phase of compressor 10
Even.
When multiple on-line system is run with defrost pattern, as shown in Fig. 2 the high pressure gaseous refrigerant that compressor 10 comes out
A part is become by entering outdoor heat exchanger 20 after check valve 91, magnetic valve 81,82 and 83 after the condensation of outdoor heat exchanger 20
High normal pressure and temperature liquid refrigerants, high normal pressure and temperature liquid refrigerants become low-pressure low-temperature gas-liquid mixed after the reducing pressure by regulating flow of electric expansion valve 70
Thing, become low-pressure low-temperature gaseous coolant after being absorbed heat indoors in heat exchanger 60, after the separation of gas-liquid separator 30, final low pressure is low
Warm gaseous coolant returns to the gas returning port of compressor 10, meanwhile, another part high temperature and high pressure gas refrigerant come out from compressor 10
Enter the anti-freeze coil pipe 21 of outdoor heat exchanger 20 after antifreeze valve body 40, to enter to the defrosting water flowed down from outdoor heat exchanger 20
Row heating, ensures that the temperature of defrosting water is higher than freezing point, so as to effectively prevent defrosting water freezing and expansion and damage outdoor heat exchanger 20,
And then multiple on-line system is effectively ensured being capable of safe and stable operation.
But during multiple on-line system defrost, if antifreeze valve body 40 breaks down, for example, due to welding procedure
In welding slag wander to being blocked in frost valve inside heat exchanging pipe or because of longtime running so that metal fragment is peeled off from tube wall
In body 40 so that the high temperature and high pressure gas refrigerant come out from compressor 10 can not be by anti-freeze coil pipe 21, so that can not be to changing
White water is heated, and causes defrosting water freezing and expansion, it is therefore desirable to carries out effective detection to antifreeze valve body 40.
As shown in figure 8, above-mentioned multiple on-line system also includes：Temperature acquisition module 100 and control module 200.
Wherein, temperature acquisition module 100 is used for the temperature value for obtaining the porch of gas-liquid separator 30, control module 200
It is connected respectively with compressor 10, antifreeze valve body 40 and temperature acquisition module 100, control module 200 is receiving antifreeze valve body
After detection instruction, control multiple on-line system enters test running heating mode, and controls compressor 10 to be run with predeterminated frequency, and
Antifreeze valve body 40 is only controlled to be in opening, control module 200 judges whether antifreeze valve body 40 breaks down according to temperature value.
Wherein, predeterminated frequency is less than or equal to 20Hz.
Specifically, as shown in figure 3, when multiple on-line system is run with heating mode, the high temperature come out from compressor 10 is high
Pressure gaseous coolant becomes high normal pressure and temperature liquid refrigerants after the condensation of indoor heat exchanger 60, becomes after the reducing pressure by regulating flow of electric expansion valve 70
Into low-pressure low-temperature gas-liquid mixture, outdoor heat exchanger 20 is then entered by check valve 97, magnetic valve 81,82 and 83, in outdoor
Become low-pressure low-temperature gaseous coolant after being absorbed heat in heat exchanger 20, then by entering gas after check valve 95 and 96 and four-way valve 50
Liquid/gas separator 30, after the separation of gas-liquid separator 30, low-temp low-pressure gaseous coolant returns to the gas returning port of compressor 10, so as to complete
The once heating circulation of multiple on-line system.
After multiple on-line system receives frost valve physical examination survey instruction, multiple on-line system enters test running heating mode, pressure
Contracting machine 10 is run with low frequency (such as frequency is less than 20Hz), now if only controlling antifreeze valve body 40 to be in opening, such as Fig. 4
Shown, the high pressure gaseous refrigerant come out from compressor 10 directly enters gas-liquid by antifreeze valve body 40 and anti-freeze coil pipe 21
Separator 30, the gas returning port of compressor 10 is then returned to after the separation of gas-liquid separator 30.When 10 continuous service of compressor, by
In the high pressure gaseous refrigerant that compressor 10 comes out without outdoor heat exchanger 20, indoor heat exchanger 60 and electric expansion valve
70 are exchanged heat or reducing pressure by regulating flow, but directly return to compressor 10 by anti-freeze coil pipe 21 and gas-liquid separator 30, therefore,
When antifreeze 40 normal work of valve body, the temperature of the porch of gas-liquid separator 30 will continue to increase, now can be by gas
The temperature value of the porch of liquid/gas separator 30 comes whether the antifreeze valve body 40 of effective detection breaks down.
It should be noted that the multiple on-line system shown in Fig. 2-Fig. 4 is only one embodiment of the present of invention, will pass through this
Embodiment clearer can illustrate to the present invention.
In one embodiment of the invention, control module 200 is judging whether antifreeze valve body 40 occurs according to temperature value
During failure, wherein, control module 200 judges whether temperature value is in the state that persistently reduces, and is in persistently to reduce state in temperature value
When, judge that antifreeze valve body 40 breaks down.
Specifically, after multiple on-line system, which receives frost valve physical examination, surveys instruction, control module 200 controls multiple on-line system
Into test running heating mode, compressor 10 is run with predeterminated frequency (such as 20Hz), and then control module 200 only controls frost valve
Body 40 is in opening, so that the high pressure gaseous refrigerant that compressor 10 comes out directly passes through anti-freeze coil pipe 21 and gas-liquid
Separator 30 returns to compressor 10.In the running of compressor 10, temperature acquisition module 100 detects gas-liquid separator 30 in real time
The temperature value of porch, control module 200 judged the temperature value of detection, when temperature value is in continue increasing state, is then sentenced
The antifreeze valve body 40 that breaks does not break down；When temperature value is in persistently reducing state, then judge that antifreeze valve body 40 breaks down, so as to real
Now to the fast and effective detection of antifreeze valve body 40, so that related personnel can change antifreeze valve body 40 in time, effectively prevent because anti-
Freeze the failure of valve body 40 defrosting water during defrost can not be carried out heating so that defrosting water freezing and expansion and damage outdoor heat exchange
Device 20, and then ensure that system being capable of safe and reliable operation.
Further, as shown in figure 5, when multiple on-line system receives frost valve physical examination and surveys instruction, control module 200 is controlled
Multiple on-line system processed enters test running heating mode, and the low frequency of compressor 10 (such as 20Hz) operating, then control module 200 is only opened
Antifreeze valve body 40, and after 1 minute, whether persistently reduce, if warm if judging the temperature value T1 of the porch of gas-liquid separator 30
Angle value T1 is persistently reduced, then judges that antifreeze valve body 40 breaks down；If temperature value T1 is persistently raised, antifreeze valve body 40 is judged
Do not break down, i.e., antifreeze valve body 40 is in good condition.
In another embodiment of the present invention, as shown in figure 9, above-mentioned multiple on-line system also includes：Computing module
300, computing module 300 calculates the return-air degree of superheat of the porch of gas-liquid separator 30 according to temperature value, wherein, control module
200 judge whether the return-air degree of superheat is less than the default degree of superheat, and when the return-air degree of superheat is less than the default degree of superheat, judge frost valve
Body 40 breaks down.The default degree of superheat can be 3 DEG C.
In one embodiment of the invention, computing module 300 calculates entering for gas-liquid separator 30 by above-mentioned formula (1)
The return-air degree of superheat at mouthful.
Specifically, in an embodiment of the present invention, can be according to the return-air degree of superheat of the porch of gas-liquid separator 30
Variation tendency judges whether antifreeze valve body 40 breaks down.Specifically, surveyed when multiple on-line system receives frost valve physical examination
During instruction, control module 200 controls multiple on-line system to enter test running heating mode, and the low frequency of compressor 10 (such as 20Hz) operates,
Then control module 200 only opens antifreeze valve body 40, and after 1 minute, judges the return-air mistake of the porch of gas-liquid separator 30
Whether temperature ASCH=T1-Te is less than or equal to T3 DEG C, if return-air degree of superheat ASCH is less than or equal to T3 DEG C, judges antifreeze
Valve body 40 breaks down；If return-air degree of superheat ASCH persistently increases, judge that antifreeze valve body 40 does not break down.
In yet another embodiment of the present invention, control module 200 is judging whether antifreeze valve body 40 is sent out according to temperature value
During raw failure, wherein, control module 200 judges whether compressor 10 occurs high voltage protective according to temperature value, and in compressor 10
During generation high voltage protective, judge that antifreeze valve body 40 breaks down.
It should be noted that due to only opening antifreeze valve body 40 so that multiple on-line system only has a path, work as frost valve
When body 40 breaks down, high voltage protective will occur for multiple on-line system, therefore high pressure guarantor whether can occur by multiple on-line system
Protect to judge whether antifreeze valve body 40 breaks down.
Specifically, when multiple on-line system, which receives frost valve physical examination, surveys instruction, control module 200 controls multi-connected machine system
System enters test running heating mode, and controls the low frequency of compressor 10 (such as 20Hz) to operate, and only opens antifreeze valve body 40, and
After 1 minute, judge whether multiple on-line system occurs high voltage protective, in the event of high voltage protective, then judge that antifreeze valve body 40 occurs
Failure；If high voltage protective does not occur, judge that antifreeze valve body 40 does not break down.
To sum up, in an embodiment of the present invention, after multiple on-line system receives frost valve physical examination survey instruction, can pass through
Judge the temperature value of the porch of gas-liquid separator 30, gas-liquid separator 30 porch return-air super heat value or multi-connected machine system
Whether system occurs high voltage protective to confirm whether antifreeze valve body 40 breaks down, so that related personnel changes what is broken down in time
Antifreeze valve body 40, so as to ensure the safe and reliable operation of multiple on-line system.
Multiple on-line system according to embodiments of the present invention, control module is after receiving frost valve physical examination and surveying instruction, control
Multiple on-line system is run with test running heating mode, and controls compressor to be run with predeterminated frequency, and only controls antifreeze valve body
Temperature value judgement in opening, the then porch for the gas-liquid separator that control module obtains according to temperature acquisition module
Whether antifreeze valve body breaks down.Thereby, it is possible to conveniently and effectively detect to be connected with the anti-freeze coil pipe of outdoor heat exchanger
Antifreeze valve body whether normal work, so as to which effective defrost water freezing of the anti-locking system because of outdoor heat exchanger during defrost is swollen
It is swollen and cause outdoor heat exchanger to damage, and then ensure the safe and reliable operation of multiple on-line 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 (12)
1. the fault detection method of antifreeze valve body in a kind of multiple on-line system, the multiple on-line system includes compressor, outdoor is changed
Hot device and gas-liquid separator, the gas returning port of the compressor are connected with the outlet of the gas-liquid separator, it is characterised in that described
Outdoor heat exchanger includes anti-freeze coil pipe, and the exhaust outlet of the compressor passes through the antifreeze valve body and the anti-freeze coil pipe phase
Even, the fault detection method comprises the following steps：
After the multiple on-line system receives frost valve physical examination survey instruction, the multiple on-line system is controlled to be heated into test running
Pattern；
Control the compressor to be run with predeterminated frequency, and only control the antifreeze valve body to be in opening；And
The temperature value of the porch of the gas-liquid separator is obtained, and judges whether the antifreeze valve body is sent out according to the temperature value
Raw failure.
2. the fault detection method of antifreeze valve body in multiple on-line system according to claim 1, it is characterised in that described
Judge whether the antifreeze valve body breaks down according to the temperature value, specifically include：
Judge whether the temperature value is in persistently to reduce state；And
If the temperature value judges that the antifreeze valve body breaks down in state is persistently reduced.
3. the fault detection method of antifreeze valve body in multiple on-line system according to claim 1, it is characterised in that described
Judge whether the antifreeze valve body breaks down according to the temperature value, specifically include：
The return-air degree of superheat of the porch of the gas-liquid separator is calculated according to the temperature value, and judges the return-air degree of superheat
Whether the default degree of superheat is less than；And
If the return-air degree of superheat is less than the default degree of superheat, judge that the antifreeze valve body breaks down.
4. the fault detection method of antifreeze valve body in multiple on-line system according to claim 3, it is characterised in that by with
Lower formula calculates the return-air degree of superheat of the porch of the gas-liquid separator：
ACSH=T1-Te,
Wherein, ACSH is the return-air degree of superheat of the porch of the gas-liquid separator, and T1 is the porch of the gas-liquid separator
Temperature value, Te be the compressor return-air refrigerant pressure corresponding to saturation temperature.
5. the fault detection method of antifreeze valve body in multiple on-line system according to claim 1, it is characterised in that described
Judge whether the antifreeze valve body breaks down according to the temperature value, specifically include：
Judge whether the compressor occurs high voltage protective according to the temperature value；And
If the high voltage protective occurs for the compressor, judge that the antifreeze valve body breaks down.
6. the fault detection method of antifreeze valve body in the multiple on-line system according to any one of claim 1-5, its feature
It is, the predeterminated frequency is less than or equal to 20Hz.
7. a kind of multiple on-line system, including compressor, outdoor heat exchanger and gas-liquid separator, the gas returning port of the compressor and institute
The outlet for stating gas-liquid separator is connected, it is characterised in that the outdoor heat exchanger includes anti-freeze coil pipe, the row of the compressor
Gas port is connected by antifreeze valve body with the anti-freeze coil pipe, and the multiple on-line system also includes：
Temperature acquisition module, the temperature value of the porch for obtaining the gas-liquid separator；
Control module, the control module respectively with the compressor, the antifreeze valve body and the temperature acquisition module phase
Even, the control module controls the multiple on-line system to enter test running heating mould after receiving frost valve physical examination and surveying instruction
Formula, and control the compressor to be run with predeterminated frequency, and only control the antifreeze valve body to be in opening, the control
Module judges whether the antifreeze valve body breaks down according to the temperature value.
8. multiple on-line system according to claim 7, it is characterised in that the control module is sentenced according to the temperature value
When whether the antifreeze valve body that breaks breaks down, wherein,
The control module judges whether the temperature value is in the state that persistently reduces, and is in persistently to reduce state in the temperature value
When, judge that the antifreeze valve body breaks down.
9. multiple on-line system according to claim 7, it is characterised in that also include：
Computing module, the return-air that the computing module calculates the porch of the gas-liquid separator according to the temperature value overheat
Degree, wherein,
The control module judges whether the return-air degree of superheat is less than the default degree of superheat, and is less than institute in the return-air degree of superheat
When stating the default degree of superheat, judge that the antifreeze valve body breaks down.
10. multiple on-line system according to claim 9, it is characterised in that the computing module is calculated by below equation
The return-air degree of superheat of the porch of the gas-liquid separator：
ACSH=T1-Te,
Wherein, ACSH is the return-air degree of superheat of the porch of the gas-liquid separator, and T1 is the porch of the gas-liquid separator
Temperature value, Te be the compressor return-air refrigerant pressure corresponding to saturation temperature.
11. multiple on-line system according to claim 7, it is characterised in that the control module is according to the temperature value
When judging whether the antifreeze valve body breaks down, wherein,
The control module judges whether the compressor occurs high voltage protective according to the temperature value, and is sent out in the compressor
During the raw high voltage protective, judge that the antifreeze valve body breaks down.
12. according to the multiple on-line system any one of claim 7-11, it is characterised in that the predeterminated frequency be less than or
Equal to 20Hz.
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| CN201510770426.XA CN105299991B (en) | 2015-11-12 | 2015-11-12 | The fault detection method of multiple on-line system and its antifreeze valve body |
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| CN201510770426.XA CN105299991B (en) | 2015-11-12 | 2015-11-12 | The fault detection method of multiple on-line system and its antifreeze valve body |
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| CN105299991B true CN105299991B (en) | 2018-02-06 |
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| CN111156653B (en) * | 2019-12-16 | 2021-01-29 | 珠海格力电器股份有限公司 | Fault detection method for hot defrosting electromagnetic bypass valve, storage medium and air conditioner |
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| CN101957117A (en) * | 2010-09-20 | 2011-01-26 | 合肥美的荣事达电冰箱有限公司 | Defrosting heater, evaporator assembly of refrigerating equipment and refrigerator with same |
| CN103017453A (en) * | 2013-01-05 | 2013-04-03 | 合肥美菱股份有限公司 | Evaporating dish component of fridge |
| CN104422076A (en) * | 2013-08-21 | 2015-03-18 | 珠海格力电器股份有限公司 | Air conditioner cooling unit and anti-freezing control method thereof |
| CN104748261A (en) * | 2015-03-31 | 2015-07-01 | 广东美的暖通设备有限公司 | Multi-split system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008051368A (en) * | 2006-08-23 | 2008-03-06 | Matsushita Electric Ind Co Ltd | Cooling unit and storage comprising the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101957117A (en) * | 2010-09-20 | 2011-01-26 | 合肥美的荣事达电冰箱有限公司 | Defrosting heater, evaporator assembly of refrigerating equipment and refrigerator with same |
| CN103017453A (en) * | 2013-01-05 | 2013-04-03 | 合肥美菱股份有限公司 | Evaporating dish component of fridge |
| CN104422076A (en) * | 2013-08-21 | 2015-03-18 | 珠海格力电器股份有限公司 | Air conditioner cooling unit and anti-freezing control method thereof |
| CN104748261A (en) * | 2015-03-31 | 2015-07-01 | 广东美的暖通设备有限公司 | Multi-split system |
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