CN109612015A - Control guard method and air-conditioning for air-conditioning - Google Patents
Control guard method and air-conditioning for air-conditioning Download PDFInfo
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- CN109612015A CN109612015A CN201811583848.6A CN201811583848A CN109612015A CN 109612015 A CN109612015 A CN 109612015A CN 201811583848 A CN201811583848 A CN 201811583848A CN 109612015 A CN109612015 A CN 109612015A
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- air
- conditioning
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- pressure
- guard method
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses for air-conditioning control guard method and air-conditioning, control guard method include: detect air-conditioning actual pressure value, when actual pressure value changes to default inspection value, check air-conditioning whether misoperation；Default inspection value is less than preset high voltage protective value, is greater than preset low-voltage variation value.The invention can avoid the frequent start-stop of air-conditioning, effective protection air-conditioning improves working efficiency.
Description
Technical field
The present invention relates to air-conditioning technical fields, more particularly, to the control guard method of air-conditioning and air-conditioning.
Background technique
In existing air-conditioning the pressure protection start-stop of system can be judged, but in actual installation work according to the pressure value of heat exchanger
Cheng Shang, user often consider installation cost, do not install filter additional according to the rules in water side, cause the water quality of cooling water or chilled water
It cannot ensure, long-play can generate the deposits such as more scale and sand, and scale and sand can be reduced in heat exchanger
Water flow.
Side is high-pressure side where condenser in air-conditioning, will lead to system high pressure high temperature when the underfed of cooling water in it
Operation causes frequent high voltage protective alarm and Unit Commitment, and side where evaporator is low-pressure side in air-conditioning, when chilled water in it
Underfed when will lead to system low-voltage cold operation, cause frequent low-voltage variation to be alarmed and Unit Commitment, this can be very big
Reduction user use good opinion, and since fouling coefficient of heat exchanger becomes larger, influence normally to exchange heat, will also result in damage to air-conditioning
Evil.
Therefore, how to solve frequently to protect start and stop after existing air-conditioning long-time use to be that industry technology urgently to be resolved is asked
Topic.
Summary of the invention
In order to solve drawbacks described above existing in the prior art, the invention proposes for air-conditioning control guard method and
Air-conditioning.
The technical solution adopted by the present invention is that the control guard method designed for air-conditioning, comprising: detect the reality of air-conditioning
Pressure value, when actual pressure value changes to default inspection value, check air-conditioning whether misoperation.Wherein, it is small to preset inspection value
In preset high voltage protective value, it is greater than preset low-voltage variation value.
Preferably, when actual pressure value rises to high voltage protective value or drops to low-voltage variation value, the equal stoppage protection of air-conditioning.
Preferably, check air-conditioning whether the mode of misoperation are as follows: detection air-conditioning in heat exchanger practical water flow, judgement
Whether preset water conservation flow is greater than, if then air-conditioning operates normally, otherwise anomalous of air conditioner is run, air-conditioning stoppage protection.
Preferably, after checking anomalous of air conditioner operation, air-conditioning is judged according to the actual power for the water pump connecting with heat exchanger
Exception Type.
Preferably, the Exception Type of air-conditioning includes the heat exchange blockage of heat exchanger；If actual power is not less than predetermined power,
The then heat exchange blockage of heat exchanger.
Preferably, the Exception Type of air-conditioning further includes that the water flow of heat exchanger is insufficient；If actual power is lower than predetermined power,
Then the water flow of heat exchanger is insufficient.
Preferably, air-conditioning issues corresponding warning note according to the difference of Exception Type.
Preferably, every minor tick preset time detects actual pressure value and judges whether it changes to default inspection value.
In one embodiment, actual pressure value is the high side pressure of air-conditioning, and heat exchanger is condenser.
Preferably, presetting inspection value is that high voltage protective value subtracts amendment number, and amendment number is 0.1MPa.
Preferably, the high side pressure of air-conditioning is pressure at expulsion, the refrigerant inlet pressure of condenser or the condensation of compressor
Any one of refrigerant exit pressure of device.
In another embodiment, actual pressure value is the low-pressure lateral pressure of air-conditioning, and heat exchanger is evaporator.
Preferably, presetting inspection value is that low-voltage variation value adds amendment number, and amendment number is 0.1MPa.
Preferably, the low-pressure lateral pressure of air-conditioning is the refrigerant inlet pressure or evaporation of the admission pressure of compressor, evaporator
Any one of refrigerant exit pressure of device.
Preferably, high voltage protective value is the stoppage protection value of air-conditioning high-voltage switch, and low-voltage variation value is air-conditioning mesolow
The stoppage protection value of switch.
Preferably, water conservation flow is the stoppage protection value for the water flow switch connecting with heat exchanger.
Preferably, predetermined power is operation power of the water pump under the specified water flow of heat exchanger.
The invention also provides a kind of air-conditionings using above-mentioned control guard method.
Wherein, air-conditioning includes: control system, high-voltage switch gear, low tension switch and pressure sensor, and pressure sensor detection is empty
The actual pressure value of tune, control system determine whether to check the operating status of air-conditioning according to actual pressure value.
Air-conditioning further include: water flow sensor and water flow switch, water flow sensor detect the reality of heat exchanger in air-conditioning
Water flow, control system judge whether air-conditioning is operating abnormally according to actual pressure value and practical water flow.
Preferably, water flow sensor is set to the water inlet or water outlet of heat exchanger in air-conditioning.
Preferably, air-conditioning further includes power detector, the practical function for the water pump that power detector detection is connect with heat exchanger
Rate, control system judge the Exception Type of the air-conditioning according to actual power.
Preferably, air-conditioning further include: the warning note device being connect with control system.
Compared with prior art, the present invention by actual pressure value and presets inspection by the actual pressure value of detection air-conditioning
Value comparison is preset inspection value and is arranged before two high-low pressure protection values, before air-conditioning protection is shut down, carries out in time to air-conditioning
Detection, avoids the frequent start-stop of air-conditioning.The Exception Type of air-conditioning is judged by detecting practical water flow and actual power again, so as to
It targetedly safeguards, is prevented caused by causing the heat exchange efficiency of heat exchanger low due to scale problem frequently in user
Alarm, effective protection air-conditioning improve working efficiency.
Detailed description of the invention
Below with reference to embodiment and attached drawing, the present invention is described in detail, in which:
Fig. 1 is the systematic schematic diagram of preferred embodiment in the present invention；
Fig. 2 is the control flow schematic diagram of preferred embodiment in the present invention.
Specific embodiment
Control guard method proposed by the present invention is used in air-conditioning, and control guard method includes: to detect the practical pressure of air-conditioning
Force value, when actual pressure value changes to default inspection value, check air-conditioning whether misoperation.Wherein, inspection value is preset to be less than
Preset high voltage protective value is greater than preset low-voltage variation value, and actual pressure value rises to high voltage protective value or drops to low pressure
When protection value, the equal stoppage protection of air-conditioning.Preferably, every minor tick preset time detects actual pressure value and judges whether it changes
To default inspection value.
In a preferred embodiment, check air-conditioning whether Yi Chang mode are as follows: detect air-conditioning in heat exchanger practical water flow,
Judge whether to be greater than preset water conservation flow, if then air-conditioning operates normally, otherwise anomalous of air conditioner is run, and air-conditioning, which is shut down, to be protected
Shield.Preferably, after checking anomalous of air conditioner operation, the exception of air-conditioning is judged according to the actual power for the water pump connecting with heat exchanger
Type issues corresponding warning note further according to the difference of Exception Type.There are two types of the Exception Types of air-conditioning, and being respectively includes changing
The heat exchange blockage of hot device and the water flow of heat exchanger are insufficient, if actual power is not less than predetermined power, the heat exchange of heat exchanger
Blockage, if actual power is lower than predetermined power, the water flow of heat exchanger is insufficient.Control the high voltage protective value in guard method
For the stoppage protection value of air-conditioning high-voltage switch, low-voltage variation value is the stoppage protection value of air-conditioning mesolow switch, water conservation stream
Amount is the stoppage protection value of water flow switch that connect with heat exchanger, and predetermined power is the water pump that connect with heat exchanger in heat exchanger volume
Determine the operation power under water flow.
As shown in Figure 1, control guard method of the invention is not only suitable for the jam detection of condenser 1, it is also applied for evaporating
The jam detection of device.
In a preferred embodiment, actual pressure value P is the high side pressure of air-conditioning, and heat exchanger is condenser 1, presets and checks
Value is that high voltage protective value P1 subtracts amendment number, and amendment number is 0.1MPa, i.e., default inspection value is P1-0.1(MPa), the height of air-conditioning
In the refrigerant exit pressure for pressing the pressure at expulsion that lateral pressure is compressor 3, the refrigerant inlet pressure of condenser 1 or condenser 1
Any, actual pressure value P can be detected by pressure sensor, and pressure sensor is mounted on the exhaust outlet of compressor 3, condenser
1 refrigerant inlet or the refrigerant exit of condenser 1.The practical water flow W of condenser 1 can be detected by water flow sensor, water
Flow sensor is set to the water inlet or water outlet of condenser 1, and the water flow switch connecting with condenser 1 is cooling water flow switch,
Water conservation flow is the stoppage protection value of cooling water flow switch.The water pump connecting with condenser 1 is cooling water pump 4, cooling water pump 4
Actual power detected by power detector, power detector connect with cooling water pump 4, and predetermined power exists for cooling water pump 4
Operation power under the specified water flow of condenser 1.
As shown in Fig. 2, the control guard method of preferred embodiment the following steps are included:
Step 1, the detection on high-tension side actual pressure value P of air-conditioning, by itself and default inspection value P1-0.1(MPa) compared with, if P < P1-
0.1(MPa), then air-conditioning operates normally；If P1-0.1(MPa)≤P < P1, then follow the steps 2 inspection air-conditionings whether misoperation；
If P1≤P, air-conditioning stoppage protection；
The practical water flow W of condenser 1 in step 2, detection air-conditioning, by it compared with preset cooling water conservation flow W1, if W
≤ W1, then air-conditioning stoppage protection, and execute the Exception Type that step 3 judges air-conditioning；If W1 < W, air-conditioning is operated normally；
The actual power Q for the cooling water pump 4 that step 3, detection are connect with condenser 1, by itself and default cooling water pump power Q1 ratio
Compared with if Q1≤Q, the heat exchange blockage of condenser 1 issues the warning note of heat exchange blockage, and user is notified to carry out at scale
Reason；If Q < Q1, the cooling water flow of condenser 1 is insufficient, issues the warning note of condenser cooling water underfed.
In possible embodiments, actual pressure value P is the low-pressure lateral pressure of air-conditioning, and heat exchanger is evaporator, presets and checks
Value is that low-voltage variation value P2 adds amendment number, and amendment number is 0.1MPa, i.e., default inspection value is P2+0.1(MPa), the low pressure of air-conditioning
Lateral pressure is any in admission pressure, the refrigerant inlet pressure of evaporator or the refrigerant exit pressure of evaporator of compressor
Kind, actual pressure value P can be detected by pressure sensor, pressure sensor be mounted on the air inlet of compressor, evaporator it is cold
The refrigerant exit of matchmaker's entrance or evaporator.The practical water flow W of evaporator device can be detected by water flow sensor, and water flow passes
Sensor is set to the water inlet or water outlet of evaporator, and the water flow switch connecting with evaporator is chilled water flow switch, water conservation stream
Amount is the stoppage protection value for the chilled water flow switch connecting with evaporator.The water pump connecting with evaporator is chilled water pump, freezing
The actual power of water pump is detected by power detector, and power detector is connect with chilled water pump, and predetermined power is chilled water pump
Operation power under the specified water flow of evaporator.
The control guard methods of possible embodiments the following steps are included:
Step 1, the actual pressure value P for detecting air-conditioning low-pressure side, by itself and default inspection value P2+0.1(MPa) compared with, if P > P2+
0.1(MPa), then air-conditioning operates normally；If P2 < P≤P2+0.1(MPa), then follow the steps 2 inspection air-conditionings whether misoperation；
If P≤P2, air-conditioning stoppage protection；
The practical water flow W of evaporator in step 2, detection air-conditioning, by it compared with preset freezing water conservation flow W2, if W
≤ W2, then air-conditioning stoppage protection, and execute the Exception Type that step 3 judges air-conditioning；If W2 < W, air-conditioning is operated normally；
The actual power Q for the chilled water pump that step 3, detection are connect with evaporator, by it compared with default chilled water pump power Q2,
If Q2≤Q, the heat exchange blockage of evaporator makes air-conditioning issue the warning note of heat exchange blockage, and user is notified to carry out scale
Processing；If Q < Q2, the chilled-water flow of evaporator is insufficient, so that air-conditioning is issued the insufficient alarm of evaporator chilled-water flow and mentions
Show.
As shown in Figure 1, the invention also provides a kind of air-conditionings using above-mentioned control guard method, comprising: control system,
High-voltage switch gear, low tension switch, pressure sensor, water flow sensor, water flow switch, power detector and warning note device,
Control system controls the operating status of air-conditioning according to actual pressure value, judges air-conditioning further according to actual pressure value and practical water flow
Whether it is operating abnormally, the Exception Type of air-conditioning is finally judged according to actual power, and according to the different control alarms of Exception Type
Suggestion device issues corresponding warning note.
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
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (25)
1. a kind of control guard method for air-conditioning characterized by comprising the actual pressure value for detecting air-conditioning, described
When actual pressure value changes to default inspection value, check the air-conditioning whether misoperation；The default inspection value is less than default
High voltage protective value, be greater than preset low-voltage variation value.
2. control guard method as described in claim 1, which is characterized in that the actual pressure value rises to the high pressure and protects
Shield value or when dropping to low-voltage variation value, the equal stoppage protection of air-conditioning.
3. as described in claim 1 control guard method, which is characterized in that check the air-conditioning whether the mode of misoperation
Are as follows: the practical water flow for detecting heat exchanger in the air-conditioning judges whether to be greater than preset water conservation flow, if the then sky
It adjusts and operates normally, otherwise the anomalous of air conditioner operation, the air-conditioning stoppage protection.
4. control guard method as claimed in claim 3, which is characterized in that after checking the anomalous of air conditioner operation, according to
The actual power for the water pump connecting with the heat exchanger judges the Exception Type of the air-conditioning.
5. control guard method as claimed in claim 4, which is characterized in that the Exception Type of the air-conditioning includes the heat exchange
The heat exchange blockage of device；If the actual power is not less than predetermined power, the heat exchange blockage of the heat exchanger.
6. control guard method as claimed in claim 4, which is characterized in that the Exception Type of the air-conditioning further includes described changes
The water flow of hot device is insufficient；If the actual power is lower than predetermined power, the water flow of the heat exchanger is insufficient.
7. control guard method as claimed in claim 4, which is characterized in that the air-conditioning is according to the difference of the Exception Type
Issue corresponding warning note.
8. control guard method as described in claim 1, which is characterized in that every minor tick preset time detection practical pressure
Force value simultaneously judges whether it changes to the default inspection value.
9. such as the described in any item control guard methods of claim 3 to 8, which is characterized in that the actual pressure value is air-conditioning
High side pressure, the heat exchanger be condenser.
10. control guard method as claimed in claim 9, which is characterized in that the default inspection value is the high voltage protective
Value subtracts amendment number.
11. control guard method as claimed in claim 10, which is characterized in that the amendment number is 0.1MPa.
12. control guard method as claimed in claim 9, which is characterized in that the high side pressure of the air-conditioning is compressor
Any one of pressure at expulsion, the refrigerant inlet pressure of condenser or the refrigerant exit pressure of condenser.
13. such as the described in any item control guard methods of claim 3 to 8, which is characterized in that the actual pressure value is air-conditioning
Low-pressure lateral pressure, the heat exchanger be evaporator.
14. control guard method as claimed in claim 13, which is characterized in that the default inspection value is the low-voltage variation
Value plus amendment number.
15. control guard method as claimed in claim 14, which is characterized in that the amendment number is 0.1MPa.
16. control guard method as claimed in claim 13, which is characterized in that the low-pressure lateral pressure of the air-conditioning is compressor
Admission pressure, evaporator refrigerant inlet pressure or any one of the refrigerant exit pressure of evaporator.
17. control guard method as described in claim 1, which is characterized in that the high voltage protective value is high in the air-conditioning
The stoppage protection value to compress switch, the low-voltage variation value are the stoppage protection value of air-conditioning mesolow switch.
18. as claimed in claim 3 control guard method, which is characterized in that the water conservation flow be and the heat exchanger
The stoppage protection value of the water flow switch of connection.
19. such as control guard method described in claim 5 or 6, which is characterized in that the predetermined power is the water pump in institute
State the operation power under the specified water flow of heat exchanger.
20. a kind of using the air-conditioning for controlling guard method as described in any one of claim 1 to 19.
21. air-conditioning as claimed in claim 20 characterized by comprising control system, high-voltage switch gear, low tension switch and pressure
Force snesor, the pressure sensor detect the actual pressure value of the air-conditioning, and the control system is according to the actual pressure
Value determines whether to check the operating status of the air-conditioning.
22. air-conditioning as claimed in claim 21, which is characterized in that further include: water flow sensor and water flow switch, the water
Flow sensor detects the practical water flow of heat exchanger in the air-conditioning, and the control system is according to the actual pressure value and institute
It states practical water flow and checks whether the air-conditioning is operating abnormally.
23. air-conditioning as claimed in claim 22, which is characterized in that the water flow sensor is set to heat exchanger in the air-conditioning
Water inlet or water outlet.
24. air-conditioning as claimed in claim 22, which is characterized in that it further include power detector, the power detector detection
The actual power for the water pump connecting with the heat exchanger, the control system judge the different of the air-conditioning according to the actual power
Normal type.
25. air-conditioning as claimed in claim 22, which is characterized in that further include: the warning note being connect with the control system
Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811583848.6A CN109612015B (en) | 2018-12-24 | 2018-12-24 | Control protection method for air conditioner and air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811583848.6A CN109612015B (en) | 2018-12-24 | 2018-12-24 | Control protection method for air conditioner and air conditioner |
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| Publication Number | Publication Date |
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| CN109612015A true CN109612015A (en) | 2019-04-12 |
| CN109612015B CN109612015B (en) | 2019-12-10 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110440410A (en) * | 2019-08-08 | 2019-11-12 | 珠海格力电器股份有限公司 | The guard method of Water cooled air conditioners unit and Water cooled air conditioners unit |
| CN110486914A (en) * | 2019-08-21 | 2019-11-22 | 珠海格力电器股份有限公司 | A kind of control method of Hot water units, device and Hot water units |
| CN110500699A (en) * | 2019-08-19 | 2019-11-26 | 珠海格力电器股份有限公司 | Air-conditioning halt protection method, device, air-conditioner controller, air-conditioning and storage medium |
| CN113028674A (en) * | 2021-03-31 | 2021-06-25 | 四川长虹空调有限公司 | Control protection method of refrigeration system |
| CN114543305A (en) * | 2022-01-28 | 2022-05-27 | 青岛海尔空调器有限总公司 | Control method and control device of air conditioner and air conditioner |
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| CN110486914A (en) * | 2019-08-21 | 2019-11-22 | 珠海格力电器股份有限公司 | A kind of control method of Hot water units, device and Hot water units |
| CN113028674A (en) * | 2021-03-31 | 2021-06-25 | 四川长虹空调有限公司 | Control protection method of refrigeration system |
| CN114543305A (en) * | 2022-01-28 | 2022-05-27 | 青岛海尔空调器有限总公司 | Control method and control device of air conditioner and air conditioner |
| CN114543305B (en) * | 2022-01-28 | 2023-11-17 | 青岛海尔空调器有限总公司 | Air conditioner control method and device and air conditioner |
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