CN105241027A - Multi-split air-conditioning system and fault detection method for heat exchanging valves of multi-split air-conditioning system - Google Patents
Multi-split air-conditioning system and fault detection method for heat exchanging valves of multi-split air-conditioning system Download PDFInfo
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- CN105241027A CN105241027A CN201510733860.0A CN201510733860A CN105241027A CN 105241027 A CN105241027 A CN 105241027A CN 201510733860 A CN201510733860 A CN 201510733860A CN 105241027 A CN105241027 A CN 105241027A
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- heat exchange
- valve body
- exchange valve
- force value
- pressure threshold
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a fault detection method for heat exchanging valves of an outdoor heat exchanger in a multi-split air-conditioning system. The method comprises the following steps of controlling the multi-split air-conditioning system to start a refrigeration mode and controlling a compressor to operate at a preset rotating speed after the multi-split air-conditioning system receives a heat exchanging valve detection instruction, controlling the N heat exchanging valves to be opened and closed according to a preset time sequence, and obtaining a pressure value at an exhaust outlet of the compressor so as to judge whether the N heat exchanging valves have faults according to the pressure value. By means of the fault detection method, whether the heat exchanging valves have faults can be effectively detected, and therefore safe and reliable operation of the system is guaranteed. The invention further discloses the multi-split air-conditioning system.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly the fault detection method of heat exchange valve body and a kind of multiple on-line system in a kind of multiple on-line system.
Background technology
In multiple on-line system, such as two pipes system heat-reclamation multi-compressors system, can carry out freezing and heating simultaneously, therefore be subject to more and more extensive use.
In two pipes system heat-reclamation multi-compressors system, usually outdoor heat exchanger is divided into multistage (as three grades), and the electrodeless gear that the DC fan of assisted variable speed realizes the heat exchange capacity of outdoor heat exchanger regulates.Regulating to realize electrodeless gear, being all provided with a magnetic valve in the import of every one-level of outdoor heat exchanger, regulate with the electrodeless gear being realized the heat exchange capacity of outdoor heat exchanger by the opening and closing of Controlling solenoid valve.
But because the pipe fitting in multiple on-line system and magnetic valve need welded and installed, therefore when system cloud gray model, welding slag may be had to be blocked in magnetic valve, and the magnetic valve not occurring to block also may break down because being heated, therefore, in the manufacture and operation maintenance of multiple on-line system, need to detect magnetic valve.
Summary of the invention
The present invention is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, one object of the present invention is the fault detection method proposing heat exchange valve body in a kind of multiple on-line system, effectively can detect whether heat exchange valve body breaks down, thus the safe and reliable operation of the system of guarantee.
Another object of the present invention is to propose a kind of multiple on-line system.
For achieving the above object, one aspect of the present invention embodiment proposes the fault detection method of heat exchange valve body in a kind of multiple on-line system, described multiple on-line system comprises compressor, outdoor heat exchanger and indoor heat exchanger, described outdoor heat exchanger comprises N number of heat exchange unit, in the inlet ductwork of each heat exchange unit in described N number of heat exchange unit, equal correspondence is provided with heat exchange valve body, the exhaust outlet of described compressor is connected with the inlet ductwork of described each heat exchange unit respectively, the gas returning port of described compressor is connected with described indoor heat exchanger, N be greater than 1 integer, described fault detection method comprises the following steps: S1, after described multiple on-line system receives heat exchange valve health check-up survey instruction, control described multiple on-line system and enter refrigeration mode, and control described compressor and run with preset rotation speed, S2, controls N number of heat exchange valve body and opens and closes according to default sequential, and obtain the force value of the exhaust ports of described compressor, to judge according to described force value whether described N number of heat exchange valve body breaks down.
According to the fault detection method of heat exchange valve body in the multiple on-line system of the embodiment of the present invention, after multiple on-line system receives heat exchange valve health check-up survey instruction, first control multiple on-line system and enter refrigeration mode, and control compressor and run with preset rotation speed, then control N number of heat exchange valve body to open and close according to default sequential, and obtain the force value of the exhaust ports of compressor, to judge according to force value whether N number of heat exchange valve body breaks down, thus realize effective detection of N number of heat exchange valve body, and then the safe and reliable operation of the system of guarantee.
According to one embodiment of present invention, when described 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, described step S2 specifically comprises: control described second heat exchange valve body and described 3rd heat exchange valve body closedown, and control described first heat exchange valve body unlatching; After the first Preset Time, obtain the force value of the exhaust ports of described compressor, and judge whether described force value is more than or equal to preset pressure threshold value; If described force value is more than or equal to described preset pressure threshold value, then judge that described first heat exchange valve body breaks down; If described force value is less than described preset pressure threshold value, then judge that described first heat exchange valve body is in normal operating conditions.
Further, after having judged described first heat exchange valve body, described step S2 has also comprised: control described first heat exchange valve body and described 3rd heat exchange valve body closedown, and control described second heat exchange valve body unlatching; After described first Preset Time, obtain the force value of the exhaust ports of described compressor, and judge whether described force value is more than or equal to described preset pressure threshold value; If described force value is more than or equal to described preset pressure threshold value, then judge that described second heat exchange valve body breaks down; If described force value is less than described preset pressure threshold value, then judge that described second heat exchange valve body is in normal operating conditions.
Again further, after having judged described second heat exchange valve body, described step S2 has also comprised: control described first heat exchange valve body and described second heat exchange valve body closedown, and control described 3rd heat exchange valve body unlatching; After described first Preset Time, obtain the force value of the exhaust ports of described compressor, and judge whether described force value is more than or equal to described preset pressure threshold value; If described force value is more than or equal to described preset pressure threshold value, then judge that described 3rd heat exchange valve body breaks down; If described force value is less than described preset pressure threshold value, then judge that described 3rd heat exchange valve body is in normal operating conditions.
According to another embodiment of the invention, when described 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, described step S2 specifically comprises: S201, controls described first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body and all opens; S202, obtains the force value of the exhaust ports of described compressor after the first Preset Time, and judges whether described force value is more than or equal to preset pressure threshold value; S203, if described force value is more than or equal to described preset pressure threshold value, then judges that described first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body all break down; S204, if described force value is less than described preset pressure threshold value, then controls described first heat exchange valve body and closes, and re-execute step S202 after the second Preset Time; S205, if described force value is more than or equal to described preset pressure threshold value, then judges that described second heat exchange valve body and the 3rd heat exchange valve body all break down; S206, if described force value is less than described preset pressure threshold value, then controls described second heat exchange valve body and closes, and re-execute step S202 after described second Preset Time; S207, if described force value is more than or equal to described preset pressure threshold value, then judges that described 3rd heat exchange valve body breaks down; S208, if described force value is less than described preset pressure threshold value, then judges that described 3rd heat exchange valve body is in normal operating conditions.
Further, after described step S204, described step S2 also comprises: S209, if described force value is less than described preset pressure threshold value, then after described second Preset Time, controls described 3rd heat exchange valve body close, and re-execute step S202; S20a, if described force value is more than or equal to described preset pressure threshold value, then judges that described second heat exchange valve body breaks down; S20b, if described force value is less than described preset pressure threshold value, then judges that described second heat exchange valve body is in normal operating conditions.
According to still another embodiment of the invention, when described 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, described step S2 specifically comprises: S211, controls described first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body and all opens; S212, obtains the force value of the exhaust ports of described compressor after the first Preset Time, and judges whether described force value is more than or equal to preset pressure threshold value; S213, if described force value is more than or equal to described preset pressure threshold value, then judges that described first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body all break down; S214, if described force value is less than described preset pressure threshold value, then controls described second heat exchange valve body and closes, and re-execute step S212 after the second Preset Time; S215, if described force value is more than or equal to described preset pressure threshold value, then judges that described first heat exchange valve body and the 3rd heat exchange valve body all break down; S216, if described force value is less than described preset pressure threshold value, then controls described 3rd heat exchange valve body and closes, and re-execute step S212 after described second Preset Time; S217, if described force value is more than or equal to described preset pressure threshold value, then judges that described first heat exchange valve body breaks down; S218, if described force value is less than described preset pressure threshold value, then judges that described first heat exchange valve body is in normal operating conditions.
Further, after described step S214, described step S2 also comprises: S219, if described force value is less than described preset pressure threshold value, then after described second Preset Time, controls described first heat exchange valve body close, and re-execute step S212; S21a, if described force value is more than or equal to described preset pressure threshold value, then judges that described 3rd heat exchange valve body breaks down; S21b, if described force value is less than described preset pressure threshold value, then judges that described 3rd heat exchange valve body is in normal operating conditions.
According to still a further embodiment, when described 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, described step S2 specifically comprises: S221, controls described first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body and all opens; S222, obtains the force value of the exhaust ports of described compressor after the first Preset Time, and judges whether described force value is more than or equal to preset pressure threshold value; S223, if described force value is more than or equal to described preset pressure threshold value, then judges that described first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body all break down; S224, if described force value is less than described preset pressure threshold value, then controls described 3rd heat exchange valve body and closes, and re-execute step S222 after the second Preset Time; S225, if described force value is more than or equal to described preset pressure threshold value, then judges that described first heat exchange valve body and the second heat exchange valve body all break down; S226, if described force value is less than described preset pressure threshold value, then controls described first heat exchange valve body and closes, and re-execute step S222 after described second Preset Time; S227, if described force value is more than or equal to described preset pressure threshold value, then judges that described second heat exchange valve body breaks down; S228, if described force value is less than described preset pressure threshold value, then judges that described second heat exchange valve body is in normal operating conditions.
Further, after described step S224, described step S2 also comprises: S229, if described force value is less than described preset pressure threshold value, then after described second Preset Time, controls described second heat exchange valve body close, and re-execute step S222; S22a, if described force value is more than or equal to described preset pressure threshold value, then judges that described first heat exchange valve body breaks down; S22b, if described force value is less than described preset pressure threshold value, then judges that described first heat exchange valve body is in normal operating conditions.
For achieving the above object, the present invention on the other hand embodiment also proposed a kind of multiple on-line system, and it performs the fault detection method of heat exchange valve body in above-mentioned multiple on-line system.
The multiple on-line system of the embodiment of the present invention, by the fault detection method of above-mentioned heat exchange valve body, effectively can detect whether the heat exchange valve body in multiple on-line system sends fault, thus the safe and reliable operation of the system of guarantee.
Accompanying drawing explanation
Fig. 1 is the flow chart of the fault detection method of the heat exchange valve body of outdoor heat exchanger in multiple on-line system according to an embodiment of the invention.
Fig. 2 is the structural representation of multiple on-line system according to an embodiment of the invention.
Fig. 3 is the flow chart of the fault detection method of the heat exchange valve body of outdoor heat exchanger in multiple on-line system in accordance with another embodiment of the present invention.
Fig. 4 is the flow chart of the fault detection method of the heat exchange valve body of outdoor heat exchanger in the multiple on-line system according to another embodiment of the present invention.
Reference numeral: compressor 10, outdoor heat exchanger 20, indoor heat exchanger 30, first heat exchange valve body 40, second heat exchange valve body 50, the 3rd heat exchange valve body 60, outdoor fan 70, indoor fan 80, electric expansion valve 90, first check valve 100, second check valve 110, the 3rd check valve 120, pressure sensor 130.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
Fault detection method and the multiple on-line system of the heat exchange valve body of outdoor heat exchanger in the multiple on-line system proposed according to the embodiment of the present invention are described with reference to the accompanying drawings.
Fig. 1 is the flow chart of the fault detection method of the heat exchange valve body of outdoor heat exchanger in multiple on-line system according to an embodiment of the invention.
In an embodiment of the present invention, multiple on-line system comprises compressor, outdoor heat exchanger and indoor heat exchanger, outdoor heat exchanger comprises N number of heat exchange unit, in the inlet ductwork of each heat exchange unit in N number of heat exchange unit, equal correspondence is provided with heat exchange valve body, the exhaust outlet of compressor is connected with the inlet ductwork of each heat exchange unit respectively, the gas returning port of compressor is connected with indoor heat exchanger, N be greater than 1 integer.Wherein, heat exchange valve body can be magnetic valve.
Particularly, as shown in Figure 2, when outdoor heat exchanger comprises the first heat exchange unit, the second heat exchange unit and the 3rd heat exchange unit, the inlet ductwork of the first heat exchange unit is provided with the first heat exchange valve body, the inlet ductwork of the second heat exchange unit is provided with the second heat exchange valve body, the inlet ductwork of the 3rd heat exchange unit is provided with the 3rd heat exchange valve body.In addition, in this embodiment, multiple on-line system can also comprise outdoor fan, indoor fan, electric expansion valve, the first check valve, the second check valve and the 3rd check valve, and the first check valve is arranged on the export pipeline of the first to the 3rd heat exchange unit to the 3rd check valve correspondence.
As shown in Figure 1, the fault detection method of the heat exchange valve body of outdoor heat exchanger in this multiple on-line system, comprises the following steps:
S1, receives heat exchange valve health check-up in multiple on-line system and surveys after instruction, controls multiple on-line system and enters refrigeration mode, and controls compressor and run with preset rotation speed.
Particularly, when needing to detect the heat exchange valve body in multiple on-line system, first send heat exchange valve health check-up and survey instruction to multiple on-line system, receive heat exchange valve health check-up in multiple on-line system to survey after instruction, multiple on-line system is run in a chiller mode, and controls compressor and run with preset rotation speed, wherein, preset rotation speed can be demarcated according to actual conditions, and such as, preset rotation speed can be the minimum running speed of compressor.
Wherein, as shown in Figure 2, when multiple on-line system is run in a chiller mode, from compressor high pressure gaseous refrigerant out by least one the heat exchange valve body the first to the 3rd heat exchange valve body laggard enter outdoor heat exchanger, high normal pressure and temperature liquid refrigerants is become after outdoor heat exchanger condensation, high normal pressure and temperature liquid refrigerants becomes low-temp low-pressure gaseous mixture after electric expansion valve reducing pressure by regulating flow, becomes low-temp low-pressure gaseous coolant, be finally back to compressor in indoor heat exchanger after heat absorption.
S2, controls N number of heat exchange valve body and opens and closes according to default sequential, and obtain the force value of the exhaust ports of compressor, to judge according to force value whether N number of heat exchange valve body breaks down.Wherein, the force value of the exhaust ports of compressor can be obtained by pressure sensor.
Particularly, after compressor runs with preset rotation speed, control N number of heat exchange valve body to open and close according to default sequential, when some heat exchange valve bodies or certain several heat exchange valve body are in opening, if the force value of the exhaust ports of compressor is too high, then show that the current heat exchange valve body being in opening breaks down.Wherein, default sequential can be successively the mode etc. of detection mode, in groups detection mode or both combinations.
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 heat exchange valve body, step S2 specifically comprises: control the second heat exchange valve body and the closedown of the 3rd heat exchange valve body, and controls the first heat exchange valve body unlatching; After the first Preset Time, obtain the force value of the exhaust ports of compressor, and judge whether force value is more than or equal to preset pressure threshold value; If force value is more than or equal to preset pressure threshold value, then judge that the first heat exchange valve body breaks down; If force value is less than preset pressure threshold value; then judge that the first heat exchange valve body is in normal operating conditions; wherein; first Preset Time and preset pressure threshold value can be demarcated according to actual conditions; such as; first Preset Time can be 2min, force value when preset pressure threshold value can be off-premises station generation high voltage protective.
After having judged the first heat exchange valve body, step S2 has also comprised: control the first heat exchange valve body and the closedown of the 3rd heat exchange valve body, and controls the second heat exchange valve body unlatching; After the first Preset Time, obtain the force value of the exhaust ports of compressor, and judge whether force value is more than or equal to preset pressure threshold value; If force value is more than or equal to preset pressure threshold value, then judge that the second heat exchange valve body breaks down; If force value is less than preset pressure threshold value, then judge that the second heat exchange valve body is in normal operating conditions.
After having judged the second heat exchange valve body, step S2 has also comprised: control the first heat exchange valve body and the closedown of the second heat exchange valve body, and controls the 3rd heat exchange valve body unlatching; After the first Preset Time, obtain the force value of the exhaust ports of compressor, and judge whether force value is more than or equal to preset pressure threshold value; If force value is more than or equal to preset pressure threshold value, then judge that the 3rd heat exchange valve body breaks down; If force value is less than preset pressure threshold value, then judge that the 3rd heat exchange valve body is in normal operating conditions.
Particularly, as shown in Figure 3, after multiple on-line system receives heat exchange valve health check-up survey instruction (step S101), multiple on-line system enters refrigeration mode, and compressor runs (step S102) with minimum speed.Then control the first heat exchange valve body and open (step S103), and after 2min, judge whether the pressure value P c at exhaust outlet of compressor place is more than or equal to preset pressure threshold value A, if Pc >=A, off-premises station report high voltage protective fault, showing that the first heat exchange valve body is unactual to open, there is fault (step S104-S105) in the first heat exchange valve body; If Pc < is A, off-premises station does not report high voltage protective fault, then judge that the first heat exchange valve body is in normal operating conditions (step S106-S107).After the detection completing the first heat exchange valve body, control the second heat exchange valve body and be in opening (step S108), and after 5s, control the first heat exchange valve body closedown (step S109), then adopting uses the same method starts to detect (step S110-S113) the second heat exchange valve body.After the detection completing the second heat exchange valve body, control the 3rd heat exchange valve body and be in opening (step S114), and after 5s, control the second heat exchange valve body closedown (step S115), then adopting uses the same method starts to detect (step S116-S119) the 3rd heat exchange valve body, finally completes effective detection of heat exchange valve body.
Wherein, the heat exchange valve body just having controlled detection after heat exchange valve body to be detected opens a period of time is closed, such as, after the second heat exchange valve body opens 5s, just control the first heat exchange valve body close, object is to ensure that, in heat exchange valve body handoff procedure, the force value of the exhaust ports of compressor larger fluctuation can not occur.
It should be noted that; in step S104, S106, S110, S112, S116 and S118; during force value when preset pressure threshold value A is off-premises station generation high voltage protective; if the heat exchange valve body being in opening current breaks down; then the force value of the exhaust ports of compressor will be more than or equal to preset pressure threshold value A; now will there is high voltage protective in compressor, simultaneously off-premises station report high voltage protective fault.Be understandable that, also can directly by judging whether report high voltage protective fault to judge by off-premises station, whether heat exchange valve body breaks down.
The fault detection method of the embodiment of the present invention can run in a chiller mode by controlling multiple on-line system, and controls compressor and run with preset rotation speed, complete effective detection of heat exchange valve body, and detection method is simple and reliable according to successively detection mode simultaneously.
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 3rd heat exchange valve body, step S2 specifically comprises: S201, controls the first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body and all opens; S202, obtains the force value of the exhaust ports of compressor afterwards at the first Preset Time (as 2min), and judges whether force value is more than or equal to preset pressure threshold value; S203, if force value is more than or equal to preset pressure threshold value, then judges that the first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body all break down; S204, if force value is less than preset pressure threshold value, then controls the first heat exchange valve body afterwards at the second Preset Time (as 5s) and closes, and re-execute step S202; S205, if force 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 all break down; S206, if force value is less than preset pressure threshold value, then controls the second heat exchange valve body and closes, and re-execute step S202 after the second Preset Time; S207, if force value is more than or equal to preset pressure threshold value, then judges that the 3rd heat exchange valve body breaks down; S208, if force value is less than preset pressure threshold value, then judges that the 3rd heat exchange valve body is in normal operating conditions.
Particularly, this embodiment is the detection adopting detection mode in groups to realize N number of heat exchange valve body, namely first controls N number of heat exchange valve body and all opens, if after running the first Preset Time, the force value of the exhaust ports of compressor is more than or equal to preset pressure threshold value, then judge the equal fault of N number of heat exchange valve body; If the force value of the exhaust ports of compressor is less than preset pressure threshold value, then close the first heat exchange valve body after the second Preset Time, judge whether remain the heat exchange valve body of not closing all breaks down with the force value of the exhaust ports according to compressor, if the force value of the exhaust ports of compressor is more than or equal to preset pressure threshold value, then all break down except the heat exchange valve of closing is external, so detect.
Specifically, as shown in Figure 4, after multiple on-line system receives heat exchange valve health check-up survey instruction (step S301), multiple on-line system enters refrigeration mode, and compressor runs (step S302) with minimum speed.Then control the first to the 3rd heat exchange valve body all to open (step S303), and after 2min, judge whether the pressure value P c at exhaust outlet of compressor place is more than or equal to preset pressure threshold value A, if Pc >=A, off-premises station report high voltage protective fault, showing that the first to the 3rd heat exchange valve body is all unactual to open, all there is fault (step S304-S305) to the 3rd heat exchange valve body in the first heat exchange valve body; If Pc < is A, off-premises station does not report high voltage protective fault, then control the first heat exchange valve body after 5s and close (step S306-S307), if Pc >=A, off-premises station report high voltage protective fault, show that namely the second heat exchange valve body and the 3rd heat exchange valve body all break down (step S308-S309) except the external equal fault of heat exchange valve body of the first heat exchange valve; If Pc < is A, off-premises station does not report high voltage protective fault, then continue next group and judge, concrete deterministic process, as step S311-315, is not described in detail here.
Further, after step s 204, step S2 also comprises: S209, if force value is less than preset pressure threshold value, then after the second Preset Time, controls the 3rd heat exchange valve body close, and re-execute step S202; S20a, if force value is more than or equal to preset pressure threshold value, then judges that the second heat exchange valve body breaks down; S20b, if force value is less than preset pressure threshold value, then judges that the second heat exchange valve body is in normal operating conditions.
Specifically, adopt in groups detection mode time, the situation that multiple heat exchange valve body breaks down simultaneously can be detected faster, such as, when N number of heat exchange valve body all breaks down, N number of heat exchange valve body all breaks down only to need one-time detection to judge, but the situation that multiple heat exchange valve body breaks down might not be many simultaneously, therefore, when adopting which to detect, can in conjunction with successively detection mode to realize effectively detecting fast of N number of heat exchange valve body.Such as, after judging whether the 3rd heat exchange valve body breaks down, by switching the detection that the 3rd heat exchange valve body and the second heat exchange valve body have come the second heat exchange valve body, concrete testing process is not described in detail here.
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 3rd heat exchange valve body, step S2 specifically comprises: S211, controls the first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body and all opens; S212, obtains the force value of the exhaust ports of compressor after the first Preset Time, and judges whether force value is more than or equal to preset pressure threshold value; S213, if force value is more than or equal to preset pressure threshold value, then judges that the first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body all break down; S214, if force value is less than preset pressure threshold value, then controls the second heat exchange valve body and closes, and re-execute step S212 after the second Preset Time; S215, if force value is more than or equal to preset pressure threshold value, then judges that the first heat exchange valve body and the 3rd heat exchange valve body all break down; S216, if force value is less than preset pressure threshold value, then controls the 3rd heat exchange valve body and closes, and re-execute step S212 after the second Preset Time; S217, if force value is more than or equal to preset pressure threshold value, then judges that the first heat exchange valve body breaks down; S218, if force value is less than preset pressure threshold value, then judges that the first heat exchange valve body is in normal operating conditions.
After step S214, step S2 also comprises: S219, if force value is less than preset pressure threshold value, then after the second Preset Time, controls the first heat exchange valve body close, and re-execute step S212; S21a, if force value is more than or equal to preset pressure threshold value, then judges that the 3rd heat exchange valve body breaks down; S21b, if force value is less than preset pressure threshold value, then judges that the 3rd heat exchange valve body is in normal operating conditions.
Concrete testing process is similar to Fig. 4, is not described in detail here.
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 3rd heat exchange valve body, step S2 specifically comprises: S221, controls the first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body and all opens; S222, obtains the force value of the exhaust ports of compressor after the first Preset Time, and judges whether force value is more than or equal to preset pressure threshold value; S223, if force value is more than or equal to preset pressure threshold value, then judges that the first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body all break down; S224, if force value is less than preset pressure threshold value, then controls the 3rd heat exchange valve body and closes, and re-execute step S222 after the second Preset Time; S225, if force value is more than or equal to preset pressure threshold value, then judges that the first heat exchange valve body and the second heat exchange valve body all break down; S226, if force value is less than preset pressure threshold value, then controls the first heat exchange valve body and closes, and re-execute step S222 after the second Preset Time; S227, if force value is more than or equal to preset pressure threshold value, then judges that the second heat exchange valve body breaks down; S228, if force value is less than preset pressure threshold value, then judges that the second heat exchange valve body is in normal operating conditions.
After step S224, step S2 also comprises: S229, if force value is less than preset pressure threshold value, then after the second Preset Time, controls the second heat exchange valve body close, and re-execute step S222; S22a, if force value is more than or equal to preset pressure threshold value, then judges that the first heat exchange valve body breaks down; S22b, if force value is less than preset pressure threshold value, then judges that the first heat exchange valve body is in normal operating conditions.
Concrete testing process is similar to Fig. 4, is not described in detail here.
Be understandable that, in an embodiment of the present invention, the mode that detection mode, in groups detection mode, in groups detection mode combine with successively detection mode can be adopted successively, or other control modes complete effective detection of all heat exchange valve bodies, concrete detection mode has multiple, and be difficult to enumerate, therefore be not described in detail here.
In sum, according to the fault detection method of heat exchange valve body in the multiple on-line system of the embodiment of the present invention, after multiple on-line system receives heat exchange valve health check-up survey instruction, first control multiple on-line system and enter refrigeration mode, and control compressor and run with preset rotation speed, then control N number of heat exchange valve body to open and close according to default sequential, and obtain the force value of the exhaust ports of compressor, to judge according to force value whether N number of heat exchange valve body breaks down, thus realize effective detection of N number of heat exchange valve body, and then the safe and reliable operation of the system of guarantee.
For achieving the above object, the present invention on the other hand embodiment also proposed a kind of multiple on-line system, and it performs the fault detection method of heat exchange valve body in above-mentioned multiple on-line system.
The multiple on-line system of the embodiment of the present invention, by the fault detection method of above-mentioned heat exchange valve body, effectively can detect whether the heat exchange valve body in multiple on-line system sends fault, thus the safe and reliable operation of the system of guarantee.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this description or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (11)
1. the fault detection method of the heat exchange valve body of outdoor heat exchanger in a multiple on-line system, it is characterized in that, described multiple on-line system comprises compressor, outdoor heat exchanger and indoor heat exchanger, described outdoor heat exchanger comprises N number of heat exchange unit, in the inlet ductwork of each heat exchange unit in described N number of heat exchange unit, equal correspondence is provided with heat exchange valve body, the exhaust outlet of described compressor is connected with the inlet ductwork of described each heat exchange unit respectively, the gas returning port of described compressor is connected with described indoor heat exchanger, N be greater than 1 integer, described fault detection method comprises the following steps:
S1, receives heat exchange valve health check-up in described multiple on-line system and surveys after instruction, control described multiple on-line system and enter refrigeration mode, and controls described compressor and run with preset rotation speed;
S2, controls N number of heat exchange valve body and opens and closes according to default sequential, and obtain the force value of the exhaust ports of described compressor, to judge according to described force value whether described N number of heat exchange valve body breaks down.
2. the fault detection method of heat exchange valve body in multiple on-line system according to claim 1, it is characterized in that, when described 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, described step S2 specifically comprises:
Control described second heat exchange valve body and described 3rd heat exchange valve body closedown, and control described first heat exchange valve body unlatching;
After the first Preset Time, obtain the force value of the exhaust ports of described compressor, and judge whether described force value is more than or equal to preset pressure threshold value;
If described force value is more than or equal to described preset pressure threshold value, then judge that described first heat exchange valve body breaks down;
If described force value is less than described preset pressure threshold value, then judge that described first heat exchange valve body is in normal operating conditions.
3. the fault detection method of heat exchange valve body in multiple on-line system according to claim 2, it is characterized in that, after having judged described first heat exchange valve body, described step S2 has also comprised:
Control described first heat exchange valve body and described 3rd heat exchange valve body closedown, and control described second heat exchange valve body unlatching;
After described first Preset Time, obtain the force value of the exhaust ports of described compressor, and judge whether described force value is more than or equal to described preset pressure threshold value;
If described force value is more than or equal to described preset pressure threshold value, then judge that described second heat exchange valve body breaks down;
If described force value is less than described preset pressure threshold value, then judge that described second heat exchange valve body is in normal operating conditions.
4. the fault detection method of heat exchange valve body in multiple on-line system according to claim 3, it is characterized in that, after having judged described second heat exchange valve body, described step S2 has also comprised:
Control described first heat exchange valve body and described second heat exchange valve body closedown, and control described 3rd heat exchange valve body unlatching;
After described first Preset Time, obtain the force value of the exhaust ports of described compressor, and judge whether described force value is more than or equal to described preset pressure threshold value;
If described force value is more than or equal to described preset pressure threshold value, then judge that described 3rd heat exchange valve body breaks down;
If described force value is less than described preset pressure threshold value, then judge that described 3rd heat exchange valve body is in normal operating conditions.
5. the fault detection method of heat exchange valve body in multiple on-line system according to claim 1, it is characterized in that, when described 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, described step S2 specifically comprises:
S201, controls described first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body and all opens;
S202, obtains the force value of the exhaust ports of described compressor after the first Preset Time, and judges whether described force value is more than or equal to preset pressure threshold value;
S203, if described force value is more than or equal to described preset pressure threshold value, then judges that described first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body all break down;
S204, if described force value is less than described preset pressure threshold value, then controls described first heat exchange valve body and closes, and re-execute step S202 after the second Preset Time;
S205, if described force value is more than or equal to described preset pressure threshold value, then judges that described second heat exchange valve body and the 3rd heat exchange valve body all break down;
S206, if described force value is less than described preset pressure threshold value, then controls described second heat exchange valve body and closes, and re-execute step S202 after described second Preset Time;
S207, if described force value is more than or equal to described preset pressure threshold value, then judges that described 3rd heat exchange valve body breaks down;
S208, if described force value is less than described preset pressure threshold value, then judges that described 3rd heat exchange valve body is in normal operating conditions.
6. the fault detection method of heat exchange valve body in multiple on-line system according to claim 5, it is characterized in that, after described step S204, described step S2 also comprises:
S209, if described force value is less than described preset pressure threshold value, then controls described 3rd heat exchange valve body and closes, and re-execute step S202 after described second Preset Time;
S20a, if described force value is more than or equal to described preset pressure threshold value, then judges that described second heat exchange valve body breaks down;
S20b, if described force value is less than described preset pressure threshold value, then judges that described second heat exchange valve body is in normal operating conditions.
7. the fault detection method of heat exchange valve body in multiple on-line system according to claim 1, it is characterized in that, when described 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, described step S2 specifically comprises:
S211, controls described first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body and all opens;
S212, obtains the force value of the exhaust ports of described compressor after the first Preset Time, and judges whether described force value is more than or equal to preset pressure threshold value;
S213, if described force value is more than or equal to described preset pressure threshold value, then judges that described first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body all break down;
S214, if described force value is less than described preset pressure threshold value, then controls described second heat exchange valve body and closes, and re-execute step S212 after the second Preset Time;
S215, if described force value is more than or equal to described preset pressure threshold value, then judges that described first heat exchange valve body and the 3rd heat exchange valve body all break down;
S216, if described force value is less than described preset pressure threshold value, then controls described 3rd heat exchange valve body and closes, and re-execute step S212 after described second Preset Time;
S217, if described force value is more than or equal to described preset pressure threshold value, then judges that described first heat exchange valve body breaks down;
S218, if described force value is less than described preset pressure threshold value, then judges that described first heat exchange valve body is in normal operating conditions.
8. the fault detection method of heat exchange valve body in multiple on-line system according to claim 7, it is characterized in that, after described step S214, described step S2 also comprises:
S219, if described force value is less than described preset pressure threshold value, then controls described first heat exchange valve body and closes, and re-execute step S212 after described second Preset Time;
S21a, if described force value is more than or equal to described preset pressure threshold value, then judges that described 3rd heat exchange valve body breaks down;
S21b, if described force value is less than described preset pressure threshold value, then judges that described 3rd heat exchange valve body is in normal operating conditions.
9. the fault detection method of heat exchange valve body in multiple on-line system according to claim 1, it is characterized in that, when described 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, described step S2 specifically comprises:
S221, controls described first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body and all opens;
S222, obtains the force value of the exhaust ports of described compressor after the first Preset Time, and judges whether described force value is more than or equal to preset pressure threshold value;
S223, if described force value is more than or equal to described preset pressure threshold value, then judges that described first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body all break down;
S224, if described force value is less than described preset pressure threshold value, then controls described 3rd heat exchange valve body and closes, and re-execute step S222 after the second Preset Time;
S225, if described force value is more than or equal to described preset pressure threshold value, then judges that described first heat exchange valve body and the second heat exchange valve body all break down;
S226, if described force value is less than described preset pressure threshold value, then controls described first heat exchange valve body and closes, and re-execute step S222 after described second Preset Time;
S227, if described force value is more than or equal to described preset pressure threshold value, then judges that described second heat exchange valve body breaks down;
S228, if described force value is less than described preset pressure threshold value, then judges that described second heat exchange valve body is in normal operating conditions.
10. the fault detection method of heat exchange valve body in multiple on-line system according to claim 9, it is characterized in that, after described step S224, described step S2 also comprises:
S229, if described force value is less than described preset pressure threshold value, then controls described second heat exchange valve body and closes, and re-execute step S222 after described second Preset Time;
S22a, if described force value is more than or equal to described preset pressure threshold value, then judges that described first heat exchange valve body breaks down;
S22b, if described force value is less than described preset pressure threshold value, then judges that described first heat exchange valve body is in normal operating conditions.
11. 1 kinds of multiple on-line system, is characterized in that, perform the fault detection method of heat exchange valve body in the multiple on-line system according to any one of claim 1-10.
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