CN105299841A - Multi-split air conditioning system and fault detection method of heat exchange valve bodies of outdoor heat exchanger of multi-split air conditioning system - Google Patents
Multi-split air conditioning system and fault detection method of heat exchange valve bodies of outdoor heat exchanger of multi-split air conditioning system Download PDFInfo
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- CN105299841A CN105299841A CN201510776579.5A CN201510776579A CN105299841A CN 105299841 A CN105299841 A CN 105299841A CN 201510776579 A CN201510776579 A CN 201510776579A CN 105299841 A CN105299841 A CN 105299841A
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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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Abstract
The invention discloses a fault detection method of heat exchange valve bodies of an outdoor heat exchanger in a multi-split air conditioning system. The method includes the following steps that after the multi-split air conditioning system receives a heat exchange valve body detection command, the N heat exchange valve bodies are all controlled to be opened, a compressor is controlled to be operated at the preset frequency, and therefore the multi-split air conditioning system can enter a refrigeration mode; after first preset time is passed, the output temperature of each heat exchange unit is acquired, and according to the output temperature of each heat exchange unit, whether the heat exchange valve body corresponding to each heat exchange unit breaks down or not is judged. By the adoption of the fault detection method, whether the heat exchange valve bodies break down or not can be effectively detected according to the outlet temperatures of the corresponding heat exchange units, so that the 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 the heat exchange valve body of outdoor heat exchanger 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, outdoor heat exchanger is made up of three sections of heat exchangers usually, and all correspondence is provided with a magnetic valve in the inlet ductwork of each section of heat exchanger, to be realized the adjustment of 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, thus the normal operation of influential system, 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 of the heat exchange valve body proposing outdoor heat exchanger in a kind of multiple on-line system, can effectively detect whether heat exchange valve body breaks down according to the outlet temperature of heat exchange unit, 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 the heat exchange valve body of outdoor heat exchanger 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 N number of heat exchange valve body all to open, and control described compressor with predeterminated frequency operation to make described multiple on-line system enter refrigeration mode, S2, after the first Preset Time, obtains the outlet temperature of described each heat exchange unit, and judges whether the heat exchange valve body that described each heat exchange unit is corresponding breaks down according to the outlet temperature of described each heat exchange unit.
According to the fault detection method of the heat exchange valve body of outdoor heat exchanger 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, control N number of heat exchange valve body all to open, and control compressor with predeterminated frequency operation to make multiple on-line system enter refrigeration mode, after a period of time, obtain the outlet temperature of each heat exchange unit, and judge whether the heat exchange valve body that each heat exchange unit is corresponding breaks down according to the outlet temperature of each heat exchange unit, thus realize heat exchange valve body fast and effectively detect, and then the safe and reliable operation of the system of guarantee.
According to one embodiment of present invention, the outlet temperature of described each heat exchange unit is detected by the temperature sensor be arranged on the export pipeline of described each heat exchange unit.
According to one embodiment of present invention, in step sl, before the described N number of heat exchange valve body of control is all opened, also control outdoor fan to start, and after described outdoor fan runs the second Preset Time, judge whether the temperature sensor be arranged on the export pipeline of described each heat exchange unit normally works according to the outlet temperature of described each heat exchange unit and outdoor environment temperature.
According to one embodiment of present invention, in step sl, after described multiple on-line system enters refrigeration mode, also the target exhaust saturation temperature of described compressor is heightened to preset value.
According to one embodiment of present invention, judge whether the heat exchange valve body that described each heat exchange unit is corresponding breaks down, and specifically comprises according to the outlet temperature of described each heat exchange unit: obtain the temperature gap between the outlet temperature of described each heat exchange unit and outdoor environment temperature; Judge whether the temperature gap between the outlet temperature of described each heat exchange unit and described outdoor environment temperature is less than preset temperature threshold value; If the temperature gap between the outlet temperature of any one heat exchange unit and described outdoor environment temperature is less than described preset temperature threshold value, then judge that the heat exchange valve body that this heat exchange unit is corresponding breaks down.
For achieving the above object, the present invention on the other hand embodiment proposes a kind of multiple on-line system, comprise 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 multiple on-line system also comprises: temperature detecting module, for detecting the outlet temperature of described each heat exchange unit, control module, all open for controlling N number of heat exchange valve body after receiving heat exchange valve health check-up survey instruction, and control described compressor with predeterminated frequency operation to make described multiple on-line system enter refrigeration mode, and after the first Preset Time, obtain the outlet temperature of described each heat exchange unit, and judge whether the heat exchange valve body that described each heat exchange unit is corresponding breaks down according to the outlet temperature of described each heat exchange unit.
According to 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, control N number of heat exchange valve body all to open, and control compressor with predeterminated frequency operation to make multiple on-line system enter refrigeration mode, after a period of time, obtain the outlet temperature of each heat exchange unit, and judge whether the heat exchange valve body that each heat exchange unit is corresponding breaks down according to the outlet temperature of each heat exchange unit, thus realize heat exchange valve body fast and effectively detect, and then ensure the safe and reliable operation of system.
According to one embodiment of present invention, described temperature detecting module comprises N number of temperature sensor, and described N number of temperature sensor correspondence is arranged on the export pipeline of described each heat exchange unit.
According to one embodiment of present invention, before the described N number of heat exchange valve body of control is all opened, described control module also controls outdoor fan and starts, and after described outdoor fan runs the second Preset Time, according to the outlet temperature of described each heat exchange unit and outdoor environment temperature, described control module judges whether the temperature sensor be arranged on the export pipeline of described each heat exchange unit normally works.
According to one embodiment of present invention, after described multiple on-line system enters refrigeration mode, the target exhaust saturation temperature of described compressor is also heightened to preset value by described control module.
According to one embodiment of present invention, described control module is further used for obtaining the temperature gap between the outlet temperature of described each heat exchange unit and outdoor environment temperature, and judge whether the temperature gap between the outlet temperature of described each heat exchange unit and described outdoor environment temperature is less than preset temperature threshold value, wherein, if the temperature gap between the outlet temperature of any one heat exchange unit and described outdoor environment temperature is less than described preset temperature threshold value, described control module then judges that the heat exchange valve body that this heat exchange unit is corresponding breaks down.
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.
Reference numeral: compressor 10, outdoor heat exchanger 20, first heat exchange unit 21, second heat exchange unit 22, the 3rd heat exchange unit 23, 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, first temperature sensor TA, the second temperature sensor TB, three-temperature sensor TC.
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 to the 3rd check valve correspondence is arranged on the export pipeline of the first to the 3rd heat exchange unit.
As shown in Figure 1, in this multiple on-line system, the fault detection method of the heat exchange valve body of outdoor heat exchanger comprises the following steps:
S1, after multiple on-line system receives heat exchange valve health check-up survey instruction, controls N number of heat exchange valve body and all opens, and controls compressor with predeterminated frequency operation to make multiple on-line system enter refrigeration mode.Wherein, predeterminated frequency can according to circumstances be demarcated.
S2, after the first Preset Time, obtains the outlet temperature of each heat exchange unit, and judges whether the heat exchange valve body that each heat exchange unit is corresponding breaks down according to the outlet temperature of each heat exchange unit.Wherein, the first Preset Time can be demarcated according to actual conditions.
According to one embodiment of present invention, the outlet temperature of each heat exchange unit is detected by the temperature sensor be arranged on the export pipeline of each heat exchange unit.
Particularly, as shown in Figure 2, the outlet temperature of the first heat exchange unit can be detected by the first temperature sensor be arranged between the first heat exchange unit and the first check valve, detected the outlet temperature of the second heat exchange unit by the second temperature sensor be arranged between the second heat exchange unit and the second check valve, and detect the outlet temperature of the 3rd heat exchange unit by the three-temperature sensor be arranged between the 3rd heat exchange unit and the 3rd check valve.
When needing the heat exchange valve body of outdoor heat exchanger in multiple on-line system to detect, first send heat exchange valve health check-up and survey instruction to multiple on-line system, after multiple on-line system receives heat exchange valve health check-up survey instruction, control the first to the 3rd heat exchange valve body all to open, and control multiple on-line system and run in a chiller mode, and control compressor high frequency and run.
Wherein, when multiple on-line system is run in a chiller mode, from compressor high pressure gaseous refrigerant out by 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, in indoor heat exchanger, become low-temp low-pressure gaseous coolant after heat absorption, be finally back to compressor.
After multiple on-line system runs the first Preset Time (as 2min), the outlet temperature of the first heat exchange unit is obtained by the first temperature sensor, and the outlet temperature of the second heat exchange unit is obtained by the second temperature sensor, and the outlet temperature of the 3rd heat exchange unit is obtained by three-temperature sensor, then judge whether the first heat exchange valve body, the second heat exchange valve body and the 3rd heat exchange valve body break down respectively according to the outlet temperature obtained.Such as, if the outlet temperature of the first heat exchange unit that the first temperature sensor detects is higher, then show to arrive the first temperature sensor by the first heat exchange valve body from compressor high pressure gaseous refrigerant out, thus can judge that the first heat exchange valve body does not break down; If the outlet temperature that the first temperature sensor detects is smaller, then illustrate that this heat exchange path is unactual because of heat exchange valve body fault to open, the position of the first temperature sensor cannot be arrived by the first heat exchange valve body from compressor high pressure gaseous refrigerant out, thus realize the first heat exchange valve body fast and effectively detect.
According to one embodiment of present invention, in step sl, before the N number of heat exchange valve body of control is all opened, also control outdoor fan to start, and after outdoor fan runs the second Preset Time, judge whether the temperature sensor be arranged on the export pipeline of each heat exchange unit normally works according to the outlet temperature of each heat exchange unit and outdoor environment temperature.Wherein, the second Preset Time can be demarcated according to actual conditions.
Specifically, as shown in Figure 2, receive heat exchange valve health check-up in multiple on-line system and survey after instruction, control outdoor fan and start, and control the first to the 3rd heat exchange valve body and all open.When outdoor fan runs after 5min, detect the outlet temperature of the first to the 3rd heat exchange unit by first to three-temperature sensor, and compare with current outdoor environment temperature respectively.If the outlet temperature of heat exchange unit is close with outdoor environment temperature, then show that this temperature sensor normally works, otherwise this temperature sensor breaks down.Such as, when the outlet temperature of the first heat exchange unit that the first temperature sensor detects differs larger with outdoor environment temperature, then show that the first temperature sensor breaks down, now need to change the first temperature sensor, thus improve the reliability of heat exchanging valve body detection.
According to one embodiment of present invention, in step sl, after multiple on-line system enters refrigeration mode, also the target exhaust saturation temperature of compressor is heightened to preset value.Wherein, preset value can be demarcated according to actual conditions.
According to one embodiment of present invention, judge whether the heat exchange valve body that each heat exchange unit is corresponding breaks down, and specifically comprises according to the outlet temperature of each heat exchange unit: obtain the temperature gap between the outlet temperature of each heat exchange unit and outdoor environment temperature; Judge whether the temperature gap between the outlet temperature of each heat exchange unit and outdoor environment temperature is less than preset temperature threshold value; If the temperature gap between the outlet temperature of any one heat exchange unit and outdoor environment temperature is less than preset temperature threshold value, then judge that the heat exchange valve body that this heat exchange unit is corresponding breaks down.Wherein, preset temperature threshold value can be demarcated according to actual conditions.
Particularly, as shown in Figure 3, when multiple on-line system receive heat exchange valve health check-up survey instruction time, send refrigeration power-on command, outdoor fan starts running, and controls N number of heat exchange valve body and all open (step S101-S102).After outdoor fan runs 5min, judge to be arranged on the outlet temperature that temperature sensor on the export pipeline of each heat exchange unit detects whether close with outdoor environment temperature (temperature gap is in a less scope), if close, then show that each temperature sensor normally works (step S103).Then, control compressor high frequency to run, and run in a chiller mode, the target exhaust saturation temperature of compressor is heightened to 55 DEG C (step S104) simultaneously, after multiple on-line system runs 2min, if the outlet temperature of the detection of each temperature sensor and the temperature gap of outdoor environment temperature are greater than 5 DEG C, then show that corresponding heat exchange valve body does not break down; If temperature gap is less than 5 DEG C, then show that corresponding heat exchange valve body is unactual to open, arrived the position of temperature sensor from compressor high pressure gaseous refrigerant out by heat exchange valve body, thus prove that the heat exchange valve body corresponding to this temperature sensor breaks down (step S105-S113).
In sum, according to the fault detection method of the heat exchange valve body of outdoor heat exchanger 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, control N number of heat exchange valve body all to open, and control compressor with predeterminated frequency operation to make multiple on-line system enter refrigeration mode, after a period of time, obtain the outlet temperature of each heat exchange unit, and judge whether the heat exchange valve body that each heat exchange unit is corresponding breaks down according to the outlet temperature of each heat exchange unit, thus realize heat exchange valve body fast and effectively detect, and then the safe and reliable operation of the system of guarantee.And before heat exchanging valve body detects, also judge whether temperature sensor normally works, further increase the reliability that heat exchange valve health check-up is surveyed.
The multiple on-line system of embodiment of the present invention proposition is described below in conjunction with accompanying drawing.
In an embodiment of the present invention, multiple on-line system comprises compressor 10, outdoor heat exchanger 20 and indoor heat exchanger 30, outdoor heat exchanger 20 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 10 is connected with the inlet ductwork of each heat exchange unit respectively, the gas returning port of compressor 10 is connected with indoor heat exchanger 30, 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 20 comprises the first heat exchange unit 21, second heat exchange unit 22 and the 3rd heat exchange unit 23, the inlet ductwork of the first heat exchange unit 21 is provided with the first heat exchange valve body 40, the inlet ductwork inlet ductwork of the second heat exchange unit 22 being provided with the second heat exchange valve body the 50, three heat exchange unit 23 is provided with the 3rd heat exchange valve body 60.In addition, in this embodiment, multiple on-line system can also comprise outdoor fan 70, indoor fan 80, electric expansion valve 90, first check valve 100, second check valve 110 and the 3rd check valve 120, first and be arranged on the export pipeline of the first to the 3rd heat exchange unit to the 3rd check valve correspondence.
In an embodiment of the present invention, multiple on-line system also comprises: temperature detecting module and control module (not specifically illustrating in figure).
Wherein, temperature detecting module is for detecting the outlet temperature of each heat exchange unit.Control module is used for controlling N number of heat exchange valve body after receiving heat exchange valve health check-up survey instruction and all opens, and control compressor 10 with predeterminated frequency operation to make multiple on-line system enter refrigeration mode, and after the first Preset Time, obtain the outlet temperature of each heat exchange unit, and judge whether the heat exchange valve body that each heat exchange unit is corresponding breaks down according to the outlet temperature of each heat exchange unit.
According to one embodiment of present invention, temperature detecting module comprises N number of temperature sensor, and N number of temperature sensor correspondence is arranged on the export pipeline of each heat exchange unit.
Particularly, as shown in Figure 2, the outlet temperature of the first heat exchange unit 21 can be detected by the first temperature sensor TA be arranged between the first heat exchange unit 21 and the first check valve 100, detected the outlet temperature of the second heat exchange unit 22 by the second temperature sensor TB be arranged between the second heat exchange unit 22 and the second check valve 110, and detected the outlet temperature of the 3rd heat exchange unit 23 by the three-temperature sensor TC be arranged between the 3rd heat exchange unit 23 and the 3rd check valve 120.
When needing the heat exchange valve body of outdoor heat exchanger in multiple on-line system to detect, first send heat exchange valve health check-up and survey instruction to multiple on-line system, after multiple on-line system receives heat exchange valve health check-up survey instruction, control the first to the 3rd heat exchange valve body all to open, and control multiple on-line system and run in a chiller mode, and control compressor 10 high frequency and run.
Wherein, when multiple on-line system is run in a chiller mode, from compressor 10 high pressure gaseous refrigerant out by the first to the 3rd heat exchange valve body laggard enter outdoor heat exchanger 20, high normal pressure and temperature liquid refrigerants is become after outdoor heat exchanger 20 condensation, high normal pressure and temperature liquid refrigerants becomes low-temp low-pressure gaseous mixture after electric expansion valve 90 reducing pressure by regulating flow, in indoor heat exchanger 30, become low-temp low-pressure gaseous coolant after heat absorption, be finally back to compressor 10.
After multiple on-line system runs the first Preset Time (as 2min), the outlet temperature of the first heat exchange unit 21 is obtained by the first temperature sensor TA, and the outlet temperature of the second heat exchange unit 22 is obtained by the second temperature sensor TB, and the outlet temperature of the 3rd heat exchange unit 23 is obtained by three-temperature sensor TC, then judge whether the first heat exchange valve body 21, second heat exchange valve body 22 and the 3rd heat exchange valve body 23 break down respectively according to the outlet temperature obtained.Such as, if the outlet temperature of the first heat exchange unit 21 that the first temperature sensor TA detects is higher, then show to arrive the first temperature sensor TA by the first heat exchange valve body 40 from compressor 10 high pressure gaseous refrigerant out, thus can judge that the first heat exchange valve body 40 does not break down; If the outlet temperature that the first temperature sensor TA detects is smaller, then illustrate that this heat exchange path is unactual because of heat exchange valve body fault to open, the position of the first temperature sensor TA cannot be arrived by the first heat exchange valve body 40 from compressor 10 high pressure gaseous refrigerant out, thus realize the first heat exchange valve body 40 fast and effectively detect.
According to one embodiment of present invention, before the N number of heat exchange valve body of control is all opened, control module also controls outdoor fan 70 and starts, and after outdoor fan 70 runs the second Preset Time, according to the outlet temperature of each heat exchange unit and outdoor environment temperature, control module judges whether the temperature sensor be arranged on the export pipeline of each heat exchange unit normally works.
Specifically, as shown in Figure 2, receive heat exchange valve health check-up in multiple on-line system and survey after instruction, control outdoor fan 70 and start, and control the first to the 3rd heat exchange valve body and all open.After outdoor fan 70 runs 5min, detect the outlet temperature of the first to the 3rd heat exchange unit by first to three-temperature sensor, and compare with current outdoor environment temperature respectively.If the outlet temperature of heat exchange unit is close with outdoor environment temperature, then show that this temperature sensor normally works, otherwise this temperature sensor breaks down.Such as, when the outlet temperature of the first heat exchange unit 21 that the first temperature sensor TA detects differs larger with outdoor environment temperature, then show that the first temperature sensor TA breaks down, now need to change the first temperature sensor TA, thus improve the reliability of heat exchanging valve body detection.
According to one embodiment of present invention, after multiple on-line system enters refrigeration mode, the target exhaust saturation temperature of compressor 10 is also heightened to preset value by control module.
According to one embodiment of present invention, control module is further used for obtaining the temperature gap between the outlet temperature of each heat exchange unit and outdoor environment temperature, and judge whether the temperature gap between the outlet temperature of each heat exchange unit and outdoor environment temperature is less than preset temperature threshold value, wherein, if the temperature gap between the outlet temperature of any one heat exchange unit and outdoor environment temperature is less than preset temperature threshold value, control module then judges that the heat exchange valve body that this heat exchange unit is corresponding breaks down.
Particularly, as shown in Figure 3, when multiple on-line system receive heat exchange valve health check-up survey instruction time, send refrigeration power-on command, outdoor fan 70 starts running, and controls N number of heat exchange valve body and all open (step S101-S102).After outdoor fan 70 runs 5min, judge to be arranged on the outlet temperature that temperature sensor on the export pipeline of each heat exchange unit detects whether close with outdoor environment temperature (temperature gap is in a less scope), if close, then show that each temperature sensor normally works (step S103).Then, control compressor 10 high frequency to run, and run in a chiller mode, the target exhaust saturation temperature of compressor 10 is heightened to 55 DEG C (step S104) simultaneously, after multiple on-line system runs 2min, if the outlet temperature of the detection of each temperature sensor and the temperature gap of outdoor environment temperature are greater than 5 DEG C, then show that corresponding heat exchange valve body does not break down; If temperature gap is less than 5 DEG C, then show that corresponding heat exchange valve body is unactual to open, arrived the position of temperature sensor from compressor 10 high pressure gaseous refrigerant out by heat exchange valve body, thus prove that the heat exchange valve body corresponding to this temperature sensor breaks down (step S105-S113).
According to 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, control N number of heat exchange valve body all to open, and control compressor with predeterminated frequency operation to make multiple on-line system enter refrigeration mode, after a period of time, obtain the outlet temperature of each heat exchange unit, and judge whether the heat exchange valve body that each heat exchange unit is corresponding breaks down according to the outlet temperature of each heat exchange unit, thus realize heat exchange valve body fast and effectively detect, and then ensure the safe and reliable operation of system.And before heat exchanging valve body detects, also judge whether temperature detecting module normally works, further increase the reliability that heat exchange valve health check-up is surveyed.
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 (10)
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, after described multiple on-line system receives heat exchange valve health check-up survey instruction, controls N number of heat exchange valve body and all opens, and controls described compressor with predeterminated frequency operation to make described multiple on-line system enter refrigeration mode;
S2, after the first Preset Time, obtains the outlet temperature of described each heat exchange unit, and judges whether the heat exchange valve body that described each heat exchange unit is corresponding breaks down according to the outlet temperature of described each heat exchange unit.
2. the fault detection method of heat exchange valve body in multiple on-line system according to claim 1, is characterized in that, is detected the outlet temperature of described each heat exchange unit by the temperature sensor be arranged on the export pipeline of described each heat exchange unit.
3. the fault detection method of heat exchange valve body in multiple on-line system according to claim 2, it is characterized in that, in step sl, before the described N number of heat exchange valve body of control is all opened, also control outdoor fan to start, and after described outdoor fan runs the second Preset Time, judge whether the temperature sensor be arranged on the export pipeline of described each heat exchange unit normally works according to the outlet temperature of described each heat exchange unit and outdoor environment temperature.
4. the fault detection method of heat exchange valve body in multiple on-line system according to claim 1, is characterized in that, in step sl, after described multiple on-line system enters refrigeration mode, also heighten the target exhaust saturation temperature of described compressor to preset value.
5. the fault detection method of heat exchange valve body in the multiple on-line system according to any one of claim 1-4, it is characterized in that, judge whether the heat exchange valve body that described each heat exchange unit is corresponding breaks down, and specifically comprises according to the outlet temperature of described each heat exchange unit:
Obtain the temperature gap between the outlet temperature of described each heat exchange unit and outdoor environment temperature;
Judge whether the temperature gap between the outlet temperature of described each heat exchange unit and described outdoor environment temperature is less than preset temperature threshold value;
If the temperature gap between the outlet temperature of any one heat exchange unit and described outdoor environment temperature is less than described preset temperature threshold value, then judge that the heat exchange valve body that this heat exchange unit is corresponding breaks down.
6. a multiple on-line system, it is characterized in that, comprise 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, and the exhaust outlet of described compressor is connected with the inlet ductwork of described each heat exchange unit respectively, and the gas returning port of described compressor is connected with described indoor heat exchanger, N be greater than 1 integer, described multiple on-line system also comprises:
Temperature detecting module, for detecting the outlet temperature of described each heat exchange unit;
Control module, all open for controlling N number of heat exchange valve body after receiving heat exchange valve health check-up survey instruction, and control described compressor with predeterminated frequency operation to make described multiple on-line system enter refrigeration mode, and after the first Preset Time, obtain the outlet temperature of described each heat exchange unit, and judge whether the heat exchange valve body that described each heat exchange unit is corresponding breaks down according to the outlet temperature of described each heat exchange unit.
7. multiple on-line system according to claim 6, is characterized in that, described temperature detecting module comprises N number of temperature sensor, and described N number of temperature sensor correspondence is arranged on the export pipeline of described each heat exchange unit.
8. multiple on-line system according to claim 7, it is characterized in that, before the described N number of heat exchange valve body of control is all opened, described control module also controls outdoor fan and starts, and after described outdoor fan runs the second Preset Time, according to the outlet temperature of described each heat exchange unit and outdoor environment temperature, described control module judges whether the temperature sensor be arranged on the export pipeline of described each heat exchange unit normally works.
9. multiple on-line system according to claim 6, is characterized in that, after described multiple on-line system enters refrigeration mode, the target exhaust saturation temperature of described compressor is also heightened to preset value by described control module.
10. the multiple on-line system according to any one of claim 6-9, it is characterized in that, described control module is further used for obtaining the temperature gap between the outlet temperature of described each heat exchange unit and outdoor environment temperature, and judge whether the temperature gap between the outlet temperature of described each heat exchange unit and described outdoor environment temperature is less than preset temperature threshold value, wherein
If the temperature gap between the outlet temperature of any one heat exchange unit and described outdoor environment temperature is less than described preset temperature threshold value, described control module then judges that the heat exchange valve body that this heat exchange unit is corresponding breaks down.
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