CN109442826A - The fault judgment method of heat pump system and its pressure sensor - Google Patents
The fault judgment method of heat pump system and its pressure sensor Download PDFInfo
- Publication number
- CN109442826A CN109442826A CN201811230555.XA CN201811230555A CN109442826A CN 109442826 A CN109442826 A CN 109442826A CN 201811230555 A CN201811230555 A CN 201811230555A CN 109442826 A CN109442826 A CN 109442826A
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- Prior art keywords
- pressure
- value
- pressure switch
- pressure sensor
- compressor
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000003507 refrigerant Substances 0.000 claims abstract description 28
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 238000004891 communication Methods 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 10
- 235000003642 hunger Nutrition 0.000 abstract description 5
- 230000037351 starvation Effects 0.000 abstract description 5
- 230000008859 change Effects 0.000 abstract description 4
- 230000008014 freezing Effects 0.000 abstract description 4
- 238000007710 freezing Methods 0.000 abstract description 4
- 239000010725 compressor oil Substances 0.000 abstract description 3
- 230000008676 import Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 235000015110 jellies Nutrition 0.000 description 1
- 239000008274 jelly Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/005—Arrangement or mounting of control or safety devices of safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1933—Suction pressures
Abstract
The present invention provides the fault judgment method of a kind of heat pump system and its pressure sensor, the heat pump system includes compressor, pressure sensor, pressure switch and controller, pressure sensor and pressure switch are arranged at the entrance of compressor, and pressure sensor, pressure switch are electrically connected with the controller respectively；The pressure value detection range of pressure sensor is [0,2.5MPa], and the cut off value of pressure switch is [0.45MPa, 0.6MPa]；The refrigerant pressure value of pressure sensor detection compressor inlet is simultaneously sent to controller, controller is when determining that pressure switch disconnects and refrigerant pressure value is greater than preset threshold than the cut off value of pressure switch, output is used to indicate the first alarm signal of pressure sensor failure, be conducive to maintenance personal's discovery sensor failure, solve the problems, such as in time for user, avoid compressor oil starvation and damage or plate change it is freezing.
Description
Technical field
The present invention relates to field of heat exchange more particularly to the breakdown judge sides of a kind of heat pump system and its pressure sensor
Method.
Background technique
Currently, mostly a pressure sensor is arranged by the entrance in compressor to detect heat pump system in heat pump system
Refrigerant pressure value, and compressor frequency is controlled according to the refrigerant pressure value of pressure sensor detection, in the related technology, only to this
Pressure sensor short circuit and open circuit fault judgement, once and pressure sensor generate pressure detecting drift, then have no idea to sentence
Not, this will lead to compressor frequency and suction superheat is out of control.
After pressure sensor generates pressure detecting drift, heat pump system can control electric expansion valve and gradually turn down, so that low
Pressure pressure gradually decreases, and compressor is caused to lack refrigerant and frequency reducing, and then leads to that air-conditioning effect is poor, compressor oil starvation is worn, it is cold to lack
Matchmaker's protection, plate change the problems such as freezing.
Summary of the invention
The present invention provides the fault judgment method of a kind of heat pump system and its pressure sensor.
Specifically, the present invention is achieved through the following technical solutions:
According to the first aspect of the invention, a kind of heat pump system is provided, including compressor and the compressor is set
The pressure sensor of entrance further includes pressure switch and controller, wherein the pressure switch is arranged in the compressor
Entrance, and the pressure sensor, the pressure switch are electrically connected with the controller respectively；
The pressure value detection range of the pressure sensor is [0,2.5MPa], and the cut off value of the pressure switch is
[0.45MPa,0.6MPa]；
The pressure sensor detects the refrigerant pressure value of the compressor inlet and is sent to the controller, the control
Device processed is determining that the pressure switch disconnects and the cut off value of the refrigerant pressure value and the pressure switch is greater than default threshold
When value, output is used to indicate the first alarm signal of the pressure sensor failure.
Optionally, the cut off value of the pressure switch is [0.45MPa, 0.55MPa].
Optionally, the cut off value of the pressure switch is 0.48MPa.
Optionally, further includes:
Suction line, the inlet communication with the compressor；
The pressure switch and the pressure sensor are set in the suction line of the compressor.
According to the second aspect of the invention, a kind of fault judgment method of pressure sensor in heat pump system, heat pump are provided
System include compressor, be arranged in the compressor entrance pressure sensor and the entrance of the compressor is set
Pressure switch, wherein the pressure value detection range of the pressure sensor be [0,2.5MPa], the disconnection of the pressure switch
Value is [0.45MPa, 0.6MPa]；
The described method includes:
The refrigerant pressure value of the compressor inlet is detected by the pressure sensor；
When the pressure switch disconnect and the refrigerant pressure value than the pressure switch cut off value be greater than preset threshold
When, output is used to indicate the first alarm signal of the pressure sensor failure.
Optionally, the cut off value of the pressure switch is [0.45MPa, 0.55MPa].
Optionally, the cut off value of the pressure switch is 0.48MPa.
Optionally, the preset threshold is determined according to the pressure switch and the detection accuracy of the pressure sensor.
Optionally, the method also includes:
When pressure switch disconnection and the cut off value of the refrigerant pressure value and the pressure switch is less than or equal to
When preset threshold, output is used to indicate the second too low alarm signal of heat pump system low pressure.
By the above technical solution provided in an embodiment of the present invention as it can be seen that heat pump system of the invention, increasing cut off value is
The pressure switch of [0.45MPa, 0.6MPa], when low in the refrigerant pressure value ratio that pressure switch disconnects and pressure sensor detects
When the cut off value to compress switch is higher by preset threshold, controller provides the first alarm signal for being used to indicate pressure sensor failure,
Be conducive to maintenance personal's discovery sensor failure, solve the problems, such as in time for user, avoids compressor oil starvation and damage or plate changes jelly
It is bad.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
It can the limitation present invention.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention
Example, and be used to explain the principle of the present invention together with specification.
Fig. 1 is a kind of structural schematic diagram of heat pump system shown in an exemplary embodiment of the invention；
Fig. 2 is the structural block diagram of heat pump system shown in fig. 1；
Fig. 3 is the fault judgment method of pressure sensor in a kind of heat pump system shown in an of the invention exemplary embodiment
Method flow diagram.
Appended drawing reference:
1: compressor；2: pressure sensor；3: pressure switch；4: controller；5: suction line.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistented with the present invention.On the contrary, they be only with it is such as appended
The example of device and method being described in detail in claims, some aspects of the invention are consistent.
It is only to be not intended to limit the invention merely for for the purpose of describing particular embodiments in terminology used in the present invention.
It is also intended in the present invention and the "an" of singular used in the attached claims, " described " and "the" including majority
Form, unless the context clearly indicates other meaning.It is also understood that term "and/or" used herein refers to and wraps
It may be combined containing one or more associated any or all of project listed.
It will be appreciated that though various information, but this may be described using term first, second, third, etc. in the present invention
A little information should not necessarily be limited by these terms.These terms are only used to for same type of information being distinguished from each other out.For example, not departing from
In the case where the scope of the invention, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as
One information.Depending on context, word as used in this " if " can be construed to " ... when " or " when ...
When " or " in response to determination ".
With reference to the accompanying drawing, the fault judgment method of heat pump system and its pressure sensor of the invention is carried out specifically
It is bright.In the absence of conflict, the feature in following embodiment and embodiment can be combined with each other.
Fig. 1 is a kind of structural schematic diagram of heat pump system shown in an exemplary embodiment of the invention, and Fig. 2 is that Fig. 1 is shown
Heat pump system structural block diagram.
The embodiment of the present invention provides a kind of heat pump system combined with Figure 1 and Figure 2, which may include compressor 1, pressure
Force snesor 2, pressure switch 3 and controller 4, wherein pressure sensor 2 and pressure switch 3 be arranged at compressor 1 into
At mouthful, and pressure sensor 2, pressure switch 3 are electrically connected with controller 4 respectively.In the present embodiment, the pressure of pressure sensor 2
Force value detection range is [0,2.5MPa], and the cut off value of pressure switch 3 is [0.45MPa, 0.6MPa].On it should be noted that
The pressure value detection range for stating pressure sensor 2 refers to pressure value detection range when pressure sensor 2 works normally, i.e. pressure
Sensor 2 does not generate pressure value detection range when pressure detecting drift or other failures；MPa is pressure unit, Chinese
For megapascal.
In the present embodiment, pressure sensor 2 detects the refrigerant pressure value of 1 import of compressor and is sent to controller 4, controls
Device 4 processed is when determining that pressure switch 3 disconnects and refrigerant pressure value is greater than preset threshold than the cut off value of pressure switch 3, output
It is used to indicate the first alarm signal of 2 failure of pressure sensor.
The heat pump system of the embodiment of the present invention increases the pressure switch 3 that cut off value is [0.45MPa, 0.6MPa], works as pressure
When the refrigerant pressure value that power switch 3 disconnects and pressure sensor 2 detects is higher by preset threshold than the cut off value that mesolow switchs,
Controller 4 provides the first alarm signal for being used to indicate 2 failure of pressure sensor, is conducive to the event of maintenance personal's discovery sensor
Barrier solves the problems, such as in time for user, avoid 1 oil starvation of compressor and damage or plate change it is freezing.
In the present embodiment, preset threshold size can be determined according to the detection accuracy of pressure switch 3, pressure sensor 2.One
In embodiment, the detection accuracy of pressure switch 3 and pressure sensor 2 is 0.05MPa, overall error 0.1MPa, judges that pressure passes
The condition of sensor fault alarm includes: refrigerant pressure value-pressure switch 3 cut off value > 0.1MPa, i.e. preset threshold is
0.1MPa。
The too high easy false alarm of the cut off value of pressure switch 3, it is too low not have anti-frost protection effect, it is preferable anti-to realize
Freeze defencive function, in a specific implementation, the cut off value of pressure switch 3 is [0.45MPa, 0.55MPa], optionally, pressure
The cut off value of power switch 3 is 0.48MPa, it will be understood that the cut off value of pressure switch 3 may be other numerical value, such as
0.45MPa、0.46MPa、0.47MPa、0.49MPa、0.5MPa、0.51MPa、0.52MPa、0.53MPa、0.54MPa、
0.55MPa etc..The present embodiment is the type that pressure switch 3 is selected according to required cut off value.
After the cut off value for being reduced to pressure switch 3, pressure switch 3 can break the refrigerant pressure of the heat pump system of the present embodiment
It opens.If controller 4 only detect pressure switch 3 disconnect, and detect refrigerant pressure value be less than than the cut off value of pressure switch 3 or
Equal to preset threshold, then output is used to indicate the second too low alarm signal of heat pump system low pressure, at this time, it is believed that heat pump system
Unite and lack refrigerant, coolant leakage, heat pump system have that stifled, water flow is abnormal, need repairing personnel's correspondence proving.
Controller 4 exports the first alarm signal, the mode of the second alarm signal can select as needed, for example, real one
It applies in example, heat pump system further includes audio-frequency module, which is electrically connected with controller 4, and controller 4 passes through the audio-frequency module
Export the first alarm signal or the second alarm signal.
In another embodiment, heat pump system may also include alarm lamp, be electrically connected with the controller, and controller 4 passes through the report
Warning lamp exports the first alarm signal or the second alarm signal, optionally, when controller 4 controls the red light of alarm lamp display flashing
When, indicate 2 failure of pressure sensor；When controller 4, which controls alarm lamp, shows constant red light, system low-voltage pressure mistake is indicated
It is low.
In another embodiment, heat pump system may also include display screen, be electrically connected with controller 4, and controller 4 is aobvious by this
Display screen shows the first alarm signal or the second alarm signal, and display screen can show the first alarm signal by text, pictorial manner
Or second alarm signal.
The controller 4 of the present embodiment can be central processing unit (central processing unit, CPU).Controller
4 can further include hardware chip.Above-mentioned hardware chip can be specific integrated circuit (application-specific
Integrated circuit, ASIC), programmable logic device (programmable logic device, PLD) or its group
It closes.Above-mentioned PLD can be Complex Programmable Logic Devices (complex programmable logic device, CPLD), existing
Field programmable logic gate array (field-programmable gate array, FPGA), Universal Array Logic (generic
Array logic, GAL) or any combination thereof.
In some instances, heat pump system may also include suction line 5, and the import of the suction line 5 and compressor 1 connects
Logical, pressure switch 3 is set in the suction line 5 of compressor 1.In the present embodiment, for convenient for the maintenance to pressure switch 3 and more
It changes, pressure switch 3 is detachably connected in suction line 5.Optionally, pressure switch 3 is welded in suction line 5, pressure
3 risk of missing of switch is lower, but this mode is unfavorable for the maintenance and replacement of pressure switch 3.Optionally, pressure switch 3 is led to
It crosses valve seat to be removably mounted in suction line 5, cost is relatively low and is convenient for the maintenance and replacement of pressure switch 3 for the fixed form.
Certainly, pressure switch 3 can also be used other modes and be fixed in suction line 5, can specifically select as needed pressure switch 3 with
Suction line 5 is fixedly connected with mode.And in other examples, pressure switch 3 can also be directly arranged in the import of compressor 1
On.
In addition, pressure sensor 2 can also be set in suction line 5 in the present embodiment.For convenient for pressure sensor 2
Maintenance and replacement, pressure sensor 2 are detachably connected in suction line 5.Optionally, pressure sensor 2 is welded on air-breathing
On pipeline 5,2 risk of missing of pressure sensor is lower, but this mode is unfavorable for the maintenance and replacement of pressure sensor 2.It is optional
, pressure sensor 2 is removably mounted in suction line 5 by valve seat, cost is relatively low and is convenient for pressure for the fixed form
The maintenance and replacement of sensor 2.Certainly, pressure sensor 2 can also be used other modes and be fixed in suction line 5, specifically may be used
Selection pressure sensor 2 as needed is fixedly connected with mode with suction line 5.And in other examples, pressure sensor 2
It can also be directly arranged in the import of compressor 1.
Optionally, pressure sensor 2 and the setting of the interval of pressure switch 3, facilitate fixation pressure sensor 2 and pressure switch 3.
Corresponding to the heat pump system of above-described embodiment, the embodiment of the present invention also provides pressure sensor in a kind of heat pump system
Fault judgment method, specifically, referring to Fig. 3, the fault judgment method of pressure sensor includes but not in the heat pump system
It is limited to following steps:
Step S301: the refrigerant pressure value of 1 import of compressor is detected by pressure sensor 2；
Step S302: when pressure switch 3 disconnect and refrigerant pressure value than pressure switch 3 cut off value be greater than preset threshold
When, output is used to indicate the first alarm signal of 2 failure of pressure sensor.
The fault judgment method of pressure sensor in the heat pump system of the embodiment of the present invention, passes through the import in compressor 1
Place setting cut off value be [0.45MPa, 0.6MPa] pressure switch 3, when pressure switch 3 disconnect and pressure sensor 2 detect
When refrigerant pressure value is higher by preset threshold than the cut off value that mesolow switchs, controller 4, which provides, is used to indicate 2 event of pressure sensor
First alarm signal of barrier, is conducive to maintenance personal's discovery sensor failure, solves the problems, such as in time for user, avoids compressor 1
Oil starvation and damage or plate change it is freezing.
Optionally, preset threshold is determined according to pressure switch 3, the detection accuracy of pressure sensor 2.In one embodiment,
Pressure switch 3, the detection accuracy of pressure sensor 2 are 0.05MPa, overall error 0.1MPa, and preset threshold is set as
0.1MPa。
Further, in the heat pump system pressure sensor fault judgment method further include: when pressure switch 3 is disconnected
Open and refrigerant pressure value than pressure switch 3 cut off value be less than or equal to preset threshold when, output be used to indicate heat pump system
The second too low alarm signal of low pressure, this show heat pump system exist lack refrigerant, coolant leakage, heat pump system have it is stifled and/
Or the abnormal conditions such as water flow exception, need repairing personnel's correspondence proving.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Claims (9)
1. a kind of heat pump system, the pressure sensor including compressor He the entrance that the compressor is arranged in, feature exist
In further including pressure switch and controller, wherein the entrance of the compressor, and institute is arranged in the pressure switch
State pressure sensor, the pressure switch is electrically connected with the controller respectively；
The pressure value detection range of the pressure sensor is [0,2.5MPa], and the cut off value of the pressure switch is
[0.45MPa,0.6MPa]；
The pressure sensor detects the refrigerant pressure value of the compressor inlet and is sent to the controller, the controller
Determining that the pressure switch disconnects and the refrigerant pressure value than the cut off value of the pressure switch is greater than preset threshold
When, output is used to indicate the first alarm signal of the pressure sensor failure.
2. heat pump system as described in claim 1, which is characterized in that the cut off value of the pressure switch be [0.45MPa,
0.55MPa]。
3. heat pump system as claimed in claim 2, which is characterized in that the cut off value of the pressure switch is 0.48MPa.
4. heat pump system as described in claim 1, which is characterized in that further include:
Suction line, the inlet communication with the compressor；
The pressure switch and pressure sensor are set in the suction line of the compressor.
5. the fault judgment method of pressure sensor in a kind of heat pump system, which is characterized in that heat pump system includes compressor, sets
Set the entrance of the compressor pressure sensor and be arranged in the compressor entrance pressure switch, wherein institute
The pressure value detection range for stating pressure sensor is [0,2.5MPa], the cut off value of the pressure switch be [0.45MPa,
0.6MPa]；
The described method includes:
The refrigerant pressure value of the compressor inlet is detected by the pressure sensor；
When the pressure switch disconnects and the refrigerant pressure value is greater than preset threshold than the cut off value of the pressure switch,
Output is used to indicate the first alarm signal of the pressure sensor failure.
6. method as claimed in claim 5, which is characterized in that the cut off value of the pressure switch be [0.45MPa,
0.55MPa]。
7. method as claimed in claim 6, which is characterized in that the cut off value of the pressure switch is 0.48MPa.
8. method as claimed in claim 5, which is characterized in that the preset threshold is according to the pressure switch and the pressure
The detection accuracy of sensor determines.
9. method as claimed in claim 5, which is characterized in that the method also includes:
When the pressure switch disconnect and the refrigerant pressure value be less than or equal to than the cut off value of the pressure switch it is default
When threshold value, output is used to indicate the second too low alarm signal of heat pump system low pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811230555.XA CN109442826A (en) | 2018-10-22 | 2018-10-22 | The fault judgment method of heat pump system and its pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811230555.XA CN109442826A (en) | 2018-10-22 | 2018-10-22 | The fault judgment method of heat pump system and its pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109442826A true CN109442826A (en) | 2019-03-08 |
Family
ID=65547172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201811230555.XA Pending CN109442826A (en) | 2018-10-22 | 2018-10-22 | The fault judgment method of heat pump system and its pressure sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110906508A (en) * | 2019-12-09 | 2020-03-24 | 珠海格力电器股份有限公司 | Fault detection method and system for air conditioner sensor |
| CN112924353A (en) * | 2021-01-20 | 2021-06-08 | 北京理工大学 | Filter fault detection circuit, fault detection device and filter |
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Application publication date: 20190308 |