CN110762673A - Cold water air conditioning system, anti-freezing control method thereof, storage medium and computer equipment - Google Patents
Cold water air conditioning system, anti-freezing control method thereof, storage medium and computer equipment Download PDFInfo
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- CN110762673A CN110762673A CN201911077103.7A CN201911077103A CN110762673A CN 110762673 A CN110762673 A CN 110762673A CN 201911077103 A CN201911077103 A CN 201911077103A CN 110762673 A CN110762673 A CN 110762673A
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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
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
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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
- F24F11/62—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
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- 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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
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- 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
- F25B41/00—Fluid-circulation arrangements
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Abstract
The invention relates to a cold water air-conditioning system anti-freezing control method, a cold water air-conditioning system anti-freezing control system, a computer readable storage medium and computer equipment, wherein the cold water air-conditioning system anti-freezing control method comprises the following steps: acquiring a minimum temperature value of inlet and outlet temperatures and anti-freezing temperatures of chilled water of an air conditioning system; and comparing the minimum temperature value with a set temperature value, and respectively controlling the number of the started compressors and the water flow of the chilled water when the minimum temperature value is less than the set temperature value. The chilled water state is judged by testing the water flow and the water inlet and outlet temperature difference, the parameters such as the number of the unit operation systems, the size of the water pipe valve and the frequency of the water pump are controlled, the chilled water temperature is stable, the unit stably operates, the damage caused by frequent starting and stopping of the compressor is effectively avoided, the reliability of unit operation is improved, and the user experience is improved.
Description
Technical Field
The invention relates to the technical field of air conditioning equipment, in particular to a cold water air conditioning system, an anti-freezing control method thereof, a storage medium and computer equipment.
Background
At present, the cold water air conditioning unit is provided with anti-freezing protection aiming at the over-low temperature of the freezing water, the compressor is stopped to work when the detected water temperature is lower than a protection set value, and the compressor is started to work when the water temperature is higher than a recovery set value, so that the phenomenon that a shell pipe is frozen to be bad is effectively prevented. However, in actual operation, after the compressor is restarted, the water temperature drops again, which causes frequent start and stop of the compressor and poor stability. In the long term, the compressor is easily damaged, and the service life of the compressor is affected.
Disclosure of Invention
Therefore, it is necessary to provide a method and a system for controlling anti-freezing of a cold water air conditioning system, a computer readable storage medium, and a computer device, for solving the problem that the compressor is frequently started and stopped due to the fact that the freezing problem cannot be effectively solved in the prior art.
The invention provides an anti-freezing control method for a cold water air conditioning system, which comprises the following steps:
acquiring a minimum temperature value of inlet and outlet temperatures and anti-freezing temperatures of chilled water of an air conditioning system;
and comparing the minimum temperature value with a set temperature value, and respectively controlling the number of the started compressors and the water flow of the chilled water when the minimum temperature value is less than the set temperature value.
The controlling of the flow rate of the chilled water includes:
acquiring the flow velocity of the chilled water through a water flow velocity sensor and calculating the water flow of the chilled water;
and comparing the water flow with the set water flow, and increasing the opening of the chilled water inlet and outlet valve when the calculated water flow is smaller than the set water flow.
Further, when the opening degree of the chilled water inlet and outlet valve reaches the maximum value, the operating frequency of the water pump is improved.
When the operating frequency of the water pump reaches the maximum value, the user is prompted that the water flow is too small.
The controlling the number of the compressors to be started comprises the following steps:
detecting the inlet and outlet temperature of the chilled water and calculating the inlet and outlet temperature difference of the chilled water;
and comparing the temperature difference of the inlet and outlet water of the chilled water with a set temperature difference value, and reducing the starting number of the compressors of the air conditioning system when the calculated temperature difference of the inlet and outlet water of the chilled water is less than the set temperature difference value.
When the starting number of the compressors of the air conditioning system is 0, the user is prompted that the load at the tail end is too small.
The invention also provides a cold water air-conditioning system which controls the air-conditioning system by adopting the anti-freezing control method.
The present invention also proposes a computer-readable storage medium, in which a computer program is stored, which computer program, when being executed by a processor, is adapted to carry out the steps of:
acquiring a minimum temperature value of inlet and outlet temperatures and anti-freezing temperatures of chilled water of an air conditioning system;
and comparing the minimum temperature value with a set temperature value, and respectively controlling the number of the started compressors and the water flow of the chilled water when the minimum temperature value is less than the set temperature value.
The present invention also provides a computer device, including a memory and a processor, where the memory stores a computer program, and the computer program, when executed by the processor, can perform the following steps:
acquiring a minimum temperature value of inlet and outlet temperatures and anti-freezing temperatures of chilled water of an air conditioning system;
and comparing the minimum temperature value with a set temperature value, and respectively controlling the number of the started compressors and the water flow of the chilled water when the minimum temperature value is less than the set temperature value.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the chilled water state is judged by testing the water flow and the temperature difference of inlet and outlet water, parameters such as the number of unit operation systems, the size of a water pipe valve, the frequency of a water pump and the like are controlled, the chilled water temperature is ensured to be stable, and the unit stably operates, so that the damage caused by frequent starting and stopping of the compressor is effectively avoided, the reliability of unit operation is improved, and the user experience is improved.
Drawings
The invention is described in detail below with reference to specific embodiments and the attached drawing figures, wherein:
FIG. 1 is a schematic diagram of a cold water air conditioning system;
FIG. 2 is a schematic flow diagram of the antifreeze control method of the present invention;
FIG. 3 is a flow chart of the step of controlling the water flow of the present invention;
FIG. 4 is a flow chart of the steps of controlling the number of compressors turned on according to the present invention;
FIG. 5 is a flow chart of one embodiment of an antifreeze control method of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
FIG. 1 is a schematic diagram of a cold water air conditioning system. The cold water air conditioning system includes a compressor 1, a condenser 2, an electronic expansion valve 3, and a shell-and-tube evaporator 4. The refrigerant is compressed into high-temperature and high-pressure gas in the compressor, the high-temperature and high-pressure gas is converted into low-temperature and low-pressure liquid after heat exchange of the condenser and pressure reduction of the electronic expansion valve, and the low-temperature and low-pressure liquid is converted into low-pressure gas after heat exchange of the refrigerant and water in the evaporator and then returns to the compressor for circulation. The chilled water after heat exchange in the evaporator is introduced into each room through a pipeline to regulate air.
In this embodiment, a water inlet thermal bulb 11 is disposed at a water inlet of the evaporator 1, a water outlet thermal bulb 12 is disposed at a water outlet of the evaporator 1, an anti-freezing thermal bulb 13 is disposed at a bottom of the evaporator 1, and a water flow rate sensor 14 is disposed at the water outlet of the evaporator 1.
The schematic diagram of the anti-freezing control method provided by the invention is shown in FIG. 2, and comprises the following steps:
s100, obtaining the minimum temperature value of the inlet and outlet temperature and the anti-freezing temperature of the chilled water of the air conditioning system.
In this embodiment, the minimum temperature value of the frozen water in the evaporator is obtained by comparing the temperature values detected by the water inlet thermal bulb, the water outlet thermal bulb and the anti-freezing thermal bulb.
S200, comparing the minimum temperature value with a set temperature value, and respectively controlling the number of the compressors which are started and the flow rate of the chilled water when the minimum temperature value is less than the set temperature value.
The set temperature value is case specific and is generally higher than the freeze point prevention temperature.
Specifically, if the acquired minimum temperature value is higher than the set temperature value, the temperature of the water entering and exiting from the evaporator is in a normal state, and the freezing phenomenon cannot occur. If the acquired minimum temperature value is lower than the set temperature value, the temperature of the inlet and outlet water of the evaporator is in an abnormal state, and the freezing phenomenon can occur, so that the anti-freezing treatment is required.
Under the condition that the working load of the compressor is certain, the water temperature is reduced when the water flow is small, and therefore the temperature of the chilled water is increased and stabilized by increasing the water flow of inlet and outlet water of the evaporator.
When the temperature difference of the inlet water and the outlet water of the evaporator is smaller than the set temperature difference value, the requirement load on the user side is smaller. Under the condition of a certain water flow, the work load of the air conditioning unit is greater than the demand load of a user side, so that the water temperature is reduced, and therefore the starting number of the compressors needs to be reduced.
In this embodiment, judge the frozen water state through test discharge, business turn over water difference in temperature, control unit operating system quantity, water pipe valve size, water pump frequency isoparametric, guaranteed that the frozen water temperature is stable, unit even running to effectively avoid the compressor to take place frequently to open the damage that causes of stopping, not only improved the reliability of unit operation, improved user's experience moreover.
As shown in fig. 3, the step of adjusting the water flow rate includes the following steps:
and S211, acquiring the flow velocity of the chilled water through a water flow velocity sensor and calculating the water flow of the chilled water.
Specifically, a water flow rate sensor is arranged at a water inlet or a water outlet of the evaporator, and the flow rate of the chilled water is obtained through the water flow rate sensor, and the water flow rate Q = V × S is calculated, so that the water flow rate of the chilled water is obtained.
S212, comparing the water flow with the set water flow, and increasing the opening degree of the inlet and outlet valves of the chilled water when the calculated water flow is smaller than the set water flow.
Wherein, the water flow is set to be slightly larger than the water flow when the anti-freezing protection is carried out, and is measured by experiments.
Specifically, when the water flow rate of the inlet and outlet water of the evaporator is smaller than the set water flow rate, it indicates that the water flow rate is smaller, and under the condition that the workload of the air conditioning unit is fixed, the water flow rate is smaller, which results in a decrease in the water temperature, and therefore, the water flow rate of the inlet and outlet water of the evaporator needs to be increased.
For example, the work load of the air conditioning unit is 80kW, and the water flow is 13.8 m3Under the condition of/h, the temperature difference of inlet and outlet water of the evaporator is 5 degrees, when the water temperature of the water outlet of the evaporator is 7 degrees, the water with the temperature of 7 degrees flows through the indoor tail end (the temperature difference of 5 degrees is 7+ 5), the water with the temperature of 12 degrees flows back into the evaporator through the water inlet of the evaporator, the water with the temperature of 12 degrees returns to 7 degrees under the action of the air conditioning unit (the temperature difference of 5 degrees is 12-5), and the operation is repeated in cycles, so that the normal operation of the whole air conditioner is maintained.
If, at present, the water flow is only 5 m3And/h, the working load of the air conditioning unit is unchanged, the water flow is reduced, and the temperature difference is increased, so that the temperature difference between inlet water and outlet water of the evaporator is changed from 5 degrees to 7 degrees. After water with the temperature of 7 degrees flows through the indoor tail end (5-degree temperature difference 7+ 5), water with the temperature of 12 degrees flows back into the evaporator through the water inlet of the evaporator, the water with the temperature of 12 degrees is reduced to 5 degrees under the action of the air conditioning unit (12-7), after the water with the temperature of 5 degrees flows through the indoor tail end (5-degree temperature difference 5+ 5), the water with the temperature of 10 degrees flows back into the evaporator through the water inlet of the evaporator, and the water with the temperature of 10 degrees is reduced to 3 degrees under the action of the air conditioning unit (10-7). Circulation ofAfter several times, the water temperature becomes lower and lower, so that the phenomenon of freezing the pipe shell occurs.
In this embodiment, the water flow area of the water inlet and outlet of the evaporator is obtained by obtaining the opening degree of the valves at the water inlet and the water outlet of the evaporator.
Specifically, when the water flow area does not reach the maximum value, the valve is not opened to the maximum value, so that the water flow area of the water inlet and outlet of the evaporator is increased by increasing the opening degree of the valve. Then acquiring a minimum temperature value of inlet and outlet water of the evaporator, judging whether the minimum temperature value is higher than a set temperature value, and if the minimum temperature value is higher than the set temperature value, indicating that the freezing problem is solved; otherwise, the following steps are continued.
And S213, when the opening degree of the chilled water inlet and outlet valve reaches the maximum value, increasing the operating frequency of the water pump.
Specifically, when the valve opening has been maximized, it means that the water flow area is maximized, but the water flow is still too small, and therefore, it is desirable to increase the flow rate of water to and from the evaporator.
Specifically, when the flow rate does not reach the maximum value, it means that the operation frequency of the water pump is not turned on to the maximum, and therefore, by increasing the operation frequency of the water pump, the flow rate of the water to and from the evaporator is increased. Then, acquiring minimum temperature values of inlet and outlet water and anti-freezing temperature of the evaporator, judging whether the minimum temperature value is higher than a set temperature value or not, and if the minimum temperature value is higher than the set temperature value, indicating that the freezing problem is solved; otherwise, the following steps are continued.
And S214, when the flow rate reaches the maximum value, prompting a user that the water flow of inlet and outlet water of the evaporator is too small and turning off the air conditioner.
In particular, when the flow rate reaches a maximum value, this indicates that the operating frequency of the pump has been turned on to a maximum and that the flow rate of water is already at a maximum, if the minimum temperature value T is still less than the set value T at this point0，A prompt is sent to the system that a shutdown process may be required.
The energy consumption is higher because the running frequency of the water pump needs to be increased when the flow speed is increased. In the embodiment, the water flow area is increased firstly, whether the water flow area can be prevented from freezing is judged, and the flow speed is increased under the condition that the water flow area cannot be prevented from freezing, so that the energy-saving effect is achieved.
The flow speed of the water inlet and outlet of the evaporator can be increased firstly, and then the water flow area of the water inlet and outlet of the evaporator is increased, or the flow speed and the water flow area of the water inlet and outlet of the evaporator are increased simultaneously.
As shown in fig. 4, the step of adjusting the number of the system compressors to start includes the following steps:
s221, detecting the inlet and outlet temperature of the chilled water and calculating the inlet and outlet water temperature difference of the chilled water.
Specifically, detect the first temperature of evaporimeter water inlet through the temperature sensing package that intakes, detect the second temperature of evaporimeter delivery port through the temperature sensing package that goes out water, through comparing first temperature and second temperature to acquire the business turn over water difference in temperature of evaporimeter.
S222, comparing the temperature difference of the inlet and the outlet of the chilled water with a set temperature difference value, and reducing the starting number of the compressors of the air-conditioning system when the calculated temperature difference of the inlet and the outlet of the chilled water is smaller than the set temperature difference value.
The set temperature difference value is slightly larger than the temperature difference when the anti-freezing protection is carried out, and can be set as the anti-freezing temperature + 1.
Specifically, when the difference between the inlet and outlet water temperatures of the evaporator is smaller than the set temperature difference value, it indicates that the demand load on the user side is small. Under the condition of a certain water flow, the work load of the air conditioning unit is greater than the demand load of a user side, so that the water temperature is reduced, and therefore the starting number of the compressors needs to be reduced.
For example, there are now 100 rooms, each of which has 1 end unit, corresponding to 1 air conditioning unit corresponding to 100 end units. And 5 compressors are arranged in the air conditioning unit, and the number of the compressors is equivalent to 1, and the compressors correspond to 20 tail end units. Under the condition that 5 compressors and 100 tail end units are all in work, the temperature difference between inlet water and outlet water of the evaporator is 5 degrees. When the water temperature at the water outlet of the evaporator is 7 degrees, the water with the temperature of 7 degrees flows through the tail ends (5-degree temperature difference 7+ 5) of 100 indoor units, the water with the temperature of 12 degrees flows back into the evaporator through the water inlet of the evaporator, the water with the temperature of 12 degrees returns to the temperature of 7 degrees under the action of the air conditioning unit (5-degree temperature difference 12-5), and the operation is repeated, so that the normal operation of the whole air conditioner is maintained.
If there are 50 end units operating, the workload of the air conditioning unit is unchanged, the demand load on the user side is reduced, and the temperature difference of the water flow is reduced under the action of the user side, so that the 7-degree water flows through the 50 end units, and then the original 5-degree temperature difference (7 +5= 12) is changed into 3-degree temperature difference (7 +3= 10). The water with 10 degrees is changed into water with 5 degrees under the action of the air conditioning unit (5-5 degrees of temperature difference), and the water with 5 degrees flows through the tail ends (3-3 degrees of temperature difference 5+ 3) of 50 indoor units and then flows back to the evaporator with the water with 8 degrees. After the circulation is carried out for a plurality of times, the water temperature is lower and lower, so that the phenomenon of freezing the pipe shell occurs.
In this embodiment, the number of the compressors to be started is reduced, so that the workload of the air conditioning unit is the same as or similar to the demand load of the user side, and the reduction of the water temperature of the air conditioning unit and the rise of the water temperature of the user side are in a balanced state, thereby achieving the anti-freezing effect.
In this embodiment, the number of the compressors to be started is obtained, and when the number of the compressors to be started is greater than or equal to 1, the number of the compressors to be started of the air conditioning system is reduced.
Specifically, when the number of the compressors started is greater than or equal to 1, it indicates that more than one compressor is in operation and the workload of the air conditioning unit is still greater than the demand load of the user side, so that the workload of the air conditioning unit is reduced by reducing the number of the compressors started. Then, acquiring minimum temperature values of inlet and outlet water and anti-freezing temperature of the evaporator, judging whether the minimum temperature value is higher than a set temperature value or not, and if the minimum temperature value is higher than the set temperature value, indicating that the freezing problem is solved; otherwise, the following steps are continued.
In the embodiment, one compressor is turned off every time, so that the working load of the air conditioning unit is reduced, and the anti-freezing effect is achieved.
In this embodiment, when the number of the compressors that are turned on is 1, it indicates that the workload of the air conditioning unit is still greater than the demand load of the user side, and at this time, the shutdown processing is performed.
And S223, when the starting number of the compressors is 0, the system is stopped, and at the moment, the system is started again only after the water temperature is increased.
FIG. 5 is a drawing of the present inventionThe flowchart of one specific embodiment of the antifreeze control method comprises the following steps: obtaining the minimum temperature value of the inlet and outlet temperature and the anti-freezing temperature of the chilled water of the air conditioning system, and judging whether the minimum temperature value T is less than the set temperature value T0If the minimum temperature value T is less than the set temperature value T0The temperature difference and the water flow of the chilled water are respectively controlled. The temperature difference between the inlet water and the outlet water of the chilled water is controlled as follows: the method comprises the steps of detecting the inlet and outlet temperature of chilled water, calculating the inlet and outlet temperature difference of the chilled water, judging whether the inlet and outlet temperature difference of the chilled water is smaller than a set temperature difference value, if the inlet and outlet temperature difference is smaller than the set temperature difference value, closing a compressor, acquiring the number P of started compressors, judging whether the number P of the started compressors is larger than 0, and if the number P of the started compressors is equal to 0, prompting a user that the load at the tail end is too small. The flow rate of the chilled water is controlled as follows: acquiring data of a water flow speed sensor, calculating water flow Q = V S, and judging whether the water flow Q of chilled water inlet and outlet is smaller than a set water flow Q0If the water flow Q is smaller than the set water flow Q0If the valve is opened to the maximum, the running frequency of the water pump is increased, and if the running frequency of the water pump is the maximum, the water flow is indicated to be too small.
The anti-freezing control method provided by the invention can be stored in a computer readable storage medium, and when a processor of a computer calls a corresponding program in the storage medium, the steps of the anti-freezing control method of the cold water air conditioning system can be executed.
According to the invention, whether anti-freezing treatment is needed or not is judged by testing the state of the chilled water, so that the temperature of the chilled water is stable, and the unit stably runs, thereby effectively avoiding damage caused by frequent start and stop of the compressor.
In view of the above description of the antifreeze control method, system, computer readable storage medium and computer device for a cold water air conditioning system according to the present invention, those skilled in the art will be able to change the idea of the embodiment of the present invention in the specific embodiment and the application scope, and in summary, the present disclosure should not be construed as limiting the present invention.
Claims (9)
1. An anti-freezing control method of a cold water air conditioning system is characterized by comprising the following steps:
acquiring a minimum temperature value of inlet and outlet temperatures and anti-freezing temperatures of chilled water of an air conditioning system;
and comparing the minimum temperature value with a set temperature value, and respectively controlling the number of the started compressors and the water flow of the chilled water when the minimum temperature value is less than the set temperature value.
2. The antifreeze control method according to claim 1, wherein controlling the flow rate of the chilled water comprises:
acquiring the flow velocity of the chilled water through a water flow velocity sensor and calculating the water flow of the chilled water;
and comparing the water flow with the set water flow, and increasing the opening of the chilled water inlet and outlet valve when the calculated water flow is smaller than the set water flow.
3. The antifreeze control method according to claim 2, wherein the operation frequency of the water pump is increased when the opening degree of the chilled water inlet/outlet valve reaches a maximum value.
4. The antifreeze control method according to claim 3, wherein when the operating frequency of the water pump reaches a maximum value, the user is prompted that the water flow rate is too small.
5. The antifreeze control method according to claim 1, wherein controlling the number of compressors started comprises:
detecting the inlet and outlet temperature of the chilled water and calculating the inlet and outlet temperature difference of the chilled water;
and comparing the temperature difference of the inlet and outlet water of the chilled water with a set temperature difference value, and reducing the starting number of the compressors of the air conditioning system when the calculated temperature difference of the inlet and outlet water of the chilled water is less than the set temperature difference value.
6. The antifreeze control method according to claim 5, wherein when the number of the compressors of the air conditioning system that are turned on is 0, the user is prompted that the end load is too small.
7. A cold water air conditioning system, characterized in that the cold water air conditioning system controls the air conditioning system by using the anti-freezing control method of any one of claims 1 to 6.
8. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, is adapted to carry out the steps of the method according to any one of claims 1 to 6.
9. A computer device comprising a memory and a processor, characterized in that the memory stores a computer program which, when executed by the processor, performs the steps of the method of any one of claims 1 to 6.
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| CN113108393A (en) * | 2021-05-31 | 2021-07-13 | 南通华信中央空调有限公司 | Energy adjusting method for air-conditioning water system |
| CN113899053A (en) * | 2021-10-08 | 2022-01-07 | 珠海格力电器股份有限公司 | Natural cooling air conditioning unit and anti-freezing control method and device thereof |
| CN114992906A (en) * | 2021-03-02 | 2022-09-02 | 广东美的暖通设备有限公司 | Control method of heat pump system, and readable storage medium |
| WO2023071330A1 (en) * | 2021-10-26 | 2023-05-04 | 珠海格力电器股份有限公司 | Method and apparatus for regulating and controlling outlet water temperature of heat pump system, and heat pump system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114992906A (en) * | 2021-03-02 | 2022-09-02 | 广东美的暖通设备有限公司 | Control method of heat pump system, and readable storage medium |
| CN113108393A (en) * | 2021-05-31 | 2021-07-13 | 南通华信中央空调有限公司 | Energy adjusting method for air-conditioning water system |
| CN113108393B (en) * | 2021-05-31 | 2022-04-12 | 南通华信中央空调有限公司 | Energy adjusting method for air-conditioning water system |
| CN113899053A (en) * | 2021-10-08 | 2022-01-07 | 珠海格力电器股份有限公司 | Natural cooling air conditioning unit and anti-freezing control method and device thereof |
| WO2023071330A1 (en) * | 2021-10-26 | 2023-05-04 | 珠海格力电器股份有限公司 | Method and apparatus for regulating and controlling outlet water temperature of heat pump system, and heat pump system |
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