CN113899053B - Natural cooling air conditioning unit and anti-freezing control method and device thereof - Google Patents
Natural cooling air conditioning unit and anti-freezing control method and device thereof Download PDFInfo
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- CN113899053B CN113899053B CN202111170580.5A CN202111170580A CN113899053B CN 113899053 B CN113899053 B CN 113899053B CN 202111170580 A CN202111170580 A CN 202111170580A CN 113899053 B CN113899053 B CN 113899053B
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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
- F24F11/41—Defrosting; Preventing freezing
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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
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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
- F24F5/0007—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 cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
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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
- F24F5/0046—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 using natural energy, e.g. solar energy, energy from the ground
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The application relates to a natural cooling air conditioning unit antifreezing control method, a device, computer equipment, a storage medium and a natural cooling air conditioning unit, wherein the method comprises the following steps: and detecting the outlet water temperature of the shell pipe, the antifreeze solution temperature and the evaporation temperature in the natural cooling air conditioning unit, and adjusting the water pump adjusting step according to the difference value of the outlet water temperature of the shell pipe and the preset outlet water temperature threshold when the temperatures of the shell pipe, the antifreeze solution temperature and the evaporation temperature are lower than the corresponding preset temperature threshold, so that the operation parameters of the water pump in the natural cooling air conditioning unit are adjusted to prevent the evaporation component in the natural cooling air conditioning unit from freezing. In the whole process, the freezing risk of the natural cooling air conditioning unit is identified by monitoring the water outlet temperature, the antifreeze temperature and the evaporating temperature of the shell pipe in the natural cooling air conditioning unit, and when the three temperatures are lower than a preset temperature threshold, the freezing of the evaporating component can be effectively prevented by adjusting the operation parameters of the water pump.
Description
Technical Field
The application relates to the technical field of intelligent control, in particular to an antifreezing control method and device for a natural cooling air conditioning unit, computer equipment, a storage medium and the natural cooling air conditioning unit.
Background
With the progress and development of science and technology, the demands of users for refrigeration are increasing, especially for data centers, factories and the like, indoor heat sources are constant, and annual cooling is required to maintain a proper temperature, which puts higher demands on air conditioning units. The natural cooling air conditioning unit has the advantages that when the ring temperature is high, the air conditioning unit is the same as a common air conditioning unit, the compressor is used for refrigerating, the reliability of cooling is guaranteed, when the ring temperature is low, the secondary refrigerant is used for cooling the indoor space by using an external cold source, and the mode only needs to switch on the fan and the secondary refrigerant pump, so that the energy efficiency is extremely high, and the air conditioning unit has extremely high superiority.
The natural cooling air conditioning unit is a very important technical problem how to realize effective freezing prevention in the actual use process, and the conventional natural cooling air conditioning unit is mainly used for solving the problem of freezing prevention of an air conditioner in a stop state, but aiming at the natural cooling air conditioning unit, the natural cooling air conditioning unit has serious freezing risk in the operation process.
Therefore, there is an urgent need for an anti-freezing control method of a natural cooling air conditioning unit, which is suitable for the natural cooling air conditioning unit, so as to realize effective anti-freezing control on the running process of the natural cooling air conditioning unit.
Disclosure of Invention
Based on the above, it is necessary to provide an anti-freezing control method, an anti-freezing control device, computer equipment and a storage medium for a natural cooling air conditioner unit, which can effectively avoid freezing of the natural cooling air conditioner unit in the operation process, aiming at the technical problem that the natural cooling air conditioner unit has serious freezing risk in the operation process.
An antifreezing control method for a natural cooling air conditioning unit, comprising the following steps:
detecting the outlet water temperature, the antifreeze solution temperature and the evaporation temperature of a shell pipe in the natural cooling air conditioning unit;
when the shell and tube water outlet temperature, the antifreeze solution temperature and the evaporation temperature are not larger than the corresponding preset temperature threshold values, obtaining a difference value between the shell and tube water outlet temperature and the preset water outlet temperature threshold value;
determining a water pump adjusting stride according to the difference value;
and adjusting the operation parameters of the water pump according to the adjusting steps so as to prevent the evaporation assembly in the natural cooling air conditioning unit from freezing.
In one embodiment, when the shell-and-tube water outlet temperature, the antifreeze solution temperature and the evaporation temperature are not greater than the corresponding preset temperature threshold values, obtaining the difference value between the shell-and-tube water outlet temperature and the preset water outlet temperature threshold value includes:
Acquiring a preset outlet water temperature threshold;
when the shell pipe water outlet temperature is not greater than the preset water outlet temperature threshold, acquiring a preset antifreeze temperature threshold;
when the temperature of the antifreeze fluid is not greater than the preset antifreeze fluid temperature threshold, a preset evaporation temperature threshold is obtained;
and when the evaporation temperature is not greater than the preset evaporation temperature threshold, acquiring a difference value between the shell pipe water outlet temperature and the preset water outlet temperature threshold.
In one embodiment, when the shell-and-tube water outlet temperature, the antifreeze solution temperature and the evaporation temperature are not greater than the corresponding preset temperature thresholds, obtaining the difference between the shell-and-tube water outlet temperature and the preset water outlet temperature threshold further includes:
acquiring a preset evaporation temperature threshold;
when the evaporation temperature is not greater than the preset evaporation temperature threshold, acquiring a preset antifreeze temperature threshold;
when the temperature of the antifreeze fluid is not greater than the preset antifreeze fluid temperature threshold, acquiring a preset water outlet temperature threshold;
and when the shell pipe water outlet temperature is not greater than the preset water outlet temperature threshold value, acquiring a difference value between the shell pipe water outlet temperature and the preset water outlet temperature threshold value.
In one embodiment, the method for controlling the freezing protection of the natural cooling air conditioning unit further includes:
Acquiring a preset water outlet temperature threshold, a preset antifreeze temperature threshold and a preset evaporation temperature threshold;
and simultaneously comparing the shell pipe water outlet temperature with the preset water outlet temperature threshold, the antifreeze temperature with the antifreeze temperature threshold, and the evaporating temperature with the preset evaporating temperature threshold.
In one embodiment, before detecting the shell tube outlet water temperature, the antifreeze solution temperature and the evaporation temperature in the natural cooling air conditioning unit, the method further includes:
when the natural cooling air conditioning unit is detected to be electrified and started, the water pump is controlled to be started and operated with the maximum power.
In one embodiment, the determining the pump adjustment step according to the difference value includes:
acquiring a preset adjusting coefficient;
and calculating the product of the difference value and the preset adjusting coefficient to obtain the water pump adjusting stride.
In one embodiment, the method for controlling the freezing protection of the natural cooling air conditioning unit further includes:
acquiring the water outlet temperature of a plate type heat exchange component in the natural cooling air conditioner unit and presetting a water inlet temperature lower limit threshold;
when the water outlet temperature of the plate type heat exchange component in the natural cooling air conditioner unit is lower than the preset water inlet temperature lower limit value, acquiring the water inlet temperature difference between the water outlet temperature and the preset water inlet temperature lower limit value;
Determining a water pump adjusting step according to the water inlet temperature difference;
and entering the step of adjusting the operation parameters of the water pump according to the adjusting step to prevent the evaporation assembly in the natural cooling air conditioning unit from freezing.
An antifreeze control device for a natural cooling air conditioning unit, the device comprising:
the detection module is used for detecting the water outlet temperature, the antifreeze temperature and the evaporation temperature of the shell tube in the natural cooling air conditioning unit;
the difference module is used for acquiring a difference value between the shell and tube water outlet temperature and a preset water outlet temperature threshold when the shell and tube water outlet temperature, the antifreeze solution temperature and the evaporation temperature are not larger than the corresponding preset temperature threshold;
the stride determining module is used for determining the water pump adjusting stride according to the difference value;
and the adjusting module is used for adjusting the operation parameters of the water pump according to the adjusting steps so as to prevent the evaporation assembly in the natural cooling air conditioning unit from freezing.
A computer device comprising a memory storing a computer program and a processor which when executing the computer program performs the steps of:
detecting the outlet water temperature, the antifreeze solution temperature and the evaporation temperature of a shell pipe in the natural cooling air conditioning unit;
When the shell and tube water outlet temperature, the antifreeze solution temperature and the evaporation temperature are not larger than the corresponding preset temperature threshold values, obtaining a difference value between the shell and tube water outlet temperature and the preset water outlet temperature threshold value;
determining a water pump adjusting stride according to the difference value;
and adjusting the operation parameters of the water pump according to the adjusting steps so as to prevent the evaporation assembly in the natural cooling air conditioning unit from freezing.
A computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of:
detecting the outlet water temperature, the antifreeze solution temperature and the evaporation temperature of a shell pipe in the natural cooling air conditioning unit;
when the shell and tube water outlet temperature, the antifreeze solution temperature and the evaporation temperature are not larger than the corresponding preset temperature threshold values, obtaining a difference value between the shell and tube water outlet temperature and the preset water outlet temperature threshold value;
determining a water pump adjusting stride according to the difference value;
and adjusting the operation parameters of the water pump according to the adjusting steps so as to prevent the evaporation assembly in the natural cooling air conditioning unit from freezing.
According to the anti-freezing control method, the anti-freezing control device, the computer equipment and the storage medium for the natural cooling air conditioning unit, the shell pipe water outlet temperature, the anti-freezing liquid temperature and the evaporation temperature in the natural cooling air conditioning unit are detected, and when the shell pipe water outlet temperature and the anti-freezing liquid temperature are lower than the corresponding preset temperature threshold values, the water pump adjusting step is adjusted according to the difference value between the shell pipe water outlet temperature and the preset water outlet temperature threshold value, so that the operation parameters of the water pump in the natural cooling air conditioning unit are adjusted, and the evaporation component in the natural cooling air conditioning unit is prevented from freezing. In the whole process, the freezing risk of the natural cooling air conditioning unit is identified by monitoring the water outlet temperature, the antifreeze temperature and the evaporating temperature of the shell pipe in the natural cooling air conditioning unit, and when the three temperatures are lower than a preset temperature threshold, the freezing of the evaporating component can be effectively prevented by adjusting the operation parameters of the water pump.
In addition, the application also provides a natural cooling air conditioning unit, which comprises a natural cooling air conditioning unit body and an anti-freezing control assembly, wherein the anti-freezing control assembly is arranged on the natural cooling air conditioning unit body;
the anti-freezing control assembly stores a computer program, and the steps of the anti-freezing control method of the natural cooling air conditioning unit are realized when the computer program is executed by the anti-freezing control assembly.
The natural cooling air conditioning unit comprises a natural cooling air conditioning unit body and an anti-freezing control component, the anti-freezing control component is used for identifying freezing risks of the natural cooling air conditioning unit by monitoring the water outlet temperature of a shell pipe, the temperature of anti-freezing liquid and the evaporating temperature of the natural cooling air conditioning unit, and the evaporating component can be effectively prevented from freezing by adjusting the operation parameters of the water pump when the three temperatures are lower than a preset temperature threshold.
Drawings
FIG. 1 is an application environment diagram of a natural cooling air conditioning unit antifreeze control method in one embodiment;
FIG. 2 is a schematic flow chart of an antifreeze control method of a natural cooling air conditioning unit in one embodiment;
FIG. 3 is a schematic flow chart of an antifreeze control method of a natural cooling air conditioning unit in another embodiment;
FIG. 4 is a schematic flow chart of an antifreeze control method for a natural cooling air conditioning unit in a specific application example;
FIG. 5 is a block diagram of an antifreeze control device for a natural cooling air conditioning unit in one embodiment;
fig. 6 is an internal structural diagram of a computer device in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
The anti-freezing control method for the natural cooling air conditioning unit can be applied to an application environment shown in fig. 1. The natural cooling air conditioning unit 102 specifically comprises a compressor 1, a condenser 2, an expansion valve 3, a shell and tube evaporator 4, a plate heat exchanger 5, a water pump 6 and a surface cooler 7, as shown in fig. 1. The controller 104 may be internal or external to the natural cooling air conditioning unit 102, and the controller 104 performs anti-freezing control on the whole natural cooling air conditioning unit 102, which specifically includes the following processes: detecting the outlet water temperature, the antifreeze solution temperature and the evaporation temperature of a shell pipe in the natural cooling air conditioning unit; when the shell and tube water outlet temperature, the antifreeze solution temperature and the evaporation temperature are not larger than the corresponding preset temperature threshold values, obtaining a difference value between the shell and tube water outlet temperature and the preset water outlet temperature threshold value; determining a water pump adjusting stride according to the difference value; and adjusting the operation parameters of the water pump according to the adjusting steps to prevent the evaporation component (the shell-and-tube evaporator 4) in the natural cooling air conditioning unit from freezing.
In one embodiment, as shown in fig. 2, a method for controlling freezing protection of a natural cooling air conditioning unit is provided, and the method is applied to the controller 104 in fig. 1 for illustration, and includes the following steps:
s200: and detecting the water outlet temperature, the antifreeze solution temperature and the evaporating temperature of a shell pipe in the natural cooling air conditioning unit.
As shown in fig. 1, the natural cooling air conditioning unit comprises a compressor 1, a condenser 2, an expansion valve 3, a shell-and-tube evaporator 4, a plate heat exchanger 5, a water pump 6 and a surface air cooler 7. When the environment temperature is low, the natural cooling air conditioning unit adopts the compressor 1 and the natural cooling surface cooler 7 to jointly refrigerate, and the mode can utilize a natural cold source to cool a user, so that the natural cooling air conditioning unit has a certain energy-saving effect. The secondary refrigerant passing through the surface cooler 7 exchanges heat with the environment and then enters the plate heat exchanger 5 to exchange heat with the inlet water of the air conditioner, and then the inlet water of the air conditioner enters the shell and tube evaporator 4, if the inlet water temperature is low, the evaporation temperature is possibly too low to freeze the shell and tube.
The risk of freezing damage of the natural cooling air conditioning unit is detected, wherein the water outlet temperature, the antifreeze solution temperature and the evaporation temperature of a shell tube in the natural cooling air conditioning unit are detected, and particularly, temperature sensing components (temperature sensing bags) can be arranged at the three corresponding positions to monitor the temperatures of the three positions in real time.
S400: and when the shell and tube water outlet temperature, the antifreeze solution temperature and the evaporation temperature are not larger than the corresponding preset temperature threshold values, obtaining a difference value between the shell and tube water outlet temperature and the preset water outlet temperature threshold value.
The shell and tube water outlet temperature, the antifreeze temperature and the evaporation temperature are respectively provided with a preset water outlet temperature threshold, a preset antifreeze temperature threshold and a preset evaporation temperature threshold which are preset values based on historical experience, experimental mode or user requirements, wherein the preset water outlet temperature threshold is generally the water outlet temperature preset by a user, is generally 7 ℃, and is generally adjusted within the range of 7+/-0.5 ℃; the preset antifreeze temperature threshold is specifically set according to the housing tube antifreeze engineering experience, and the value of the antifreeze temperature threshold is generally 5 ℃; the preset evaporation temperature threshold is set according to practical engineering experience, and is generally set to be 3 ℃.
Here, when the shell-and-tube water outlet temperature is not greater than a preset water outlet temperature threshold, the antifreeze temperature is not greater than a preset antifreeze temperature threshold, and the evaporation temperature is not greater than a preset evaporation temperature threshold, a difference value between the shell-and-tube water outlet temperature and the preset water outlet temperature threshold is obtained.
S600: and determining the water pump adjusting stride according to the difference value.
And determining the water pump adjusting step according to the difference value between the shell pipe water outlet temperature and the preset water outlet temperature threshold value. Specifically, the corresponding relationship between the difference value and the adjustment stride of the water pump may be pre-constructed, or may be a function mapping relationship. When the water pump adjusting stride is determined in practical application, the water pump adjusting stride is determined directly according to the difference value and based on the corresponding relation or the function mapping relation. Furthermore, the difference value and the water pump adjusting stride form a positive linear relationship, in practical application, an adjusting coefficient between the difference value and the water pump adjusting stride can be obtained according to test data, and when the water pump adjusting stride needs to be determined, the difference value can be directly multiplied by the adjusting coefficient to obtain the water pump adjusting stride.
S800: and adjusting the operation parameters of the water pump according to the adjusting steps so as to prevent the evaporation assembly in the natural cooling air conditioning unit from freezing.
The operation parameters of the water pump, in particular the operation frequency of the water pump, i.e. the rotation speed of the water pump, are adjusted according to the adjustment steps. In practical application, the water pump just starts to operate at the maximum rotation speed, so that the natural cooling mode is utilized as much as possible, and the risk of freezing in the shell evaporator is increased in the mode, so that when the temperature of the shell outlet water is not greater than the preset outlet water temperature threshold value, the temperature of the antifreeze is not greater than the preset antifreeze temperature threshold value and the evaporating temperature is not greater than the preset evaporating temperature threshold value, the coolant flow of the natural cooling part is adjusted to control the heat exchange quantity of the natural cooling side, and the operation parameters of the water pump are adjusted to adjust the coolant flow of the natural cooling part, so that the freezing of the evaporating components in the natural cooling air conditioning unit is prevented.
According to the anti-freezing control method for the natural cooling air conditioning unit, the shell pipe water outlet temperature, the anti-freezing liquid temperature and the evaporation temperature in the natural cooling air conditioning unit are detected, and when the shell pipe water outlet temperature and the anti-freezing liquid temperature are lower than the corresponding preset temperature threshold values, the water pump adjusting step is adjusted according to the difference value between the shell pipe water outlet temperature and the preset water outlet temperature threshold value, so that the operation parameters of the water pump in the natural cooling air conditioning unit are adjusted, and the evaporation component in the natural cooling air conditioning unit is prevented from freezing. In the whole process, the freezing risk of the natural cooling air conditioning unit is identified by monitoring the water outlet temperature, the antifreeze temperature and the evaporating temperature of the shell pipe in the natural cooling air conditioning unit, and when the three temperatures are lower than a preset temperature threshold, the freezing of the evaporating component can be effectively prevented by adjusting the operation parameters of the water pump.
As shown in fig. 3, in one embodiment, S400 includes:
s420: acquiring a preset outlet water temperature threshold;
s440: when the shell pipe water outlet temperature is not greater than the preset water outlet temperature threshold, acquiring a preset antifreeze temperature threshold;
s460: when the temperature of the antifreeze fluid is not greater than the preset antifreeze fluid temperature threshold, a preset evaporation temperature threshold is obtained;
S480: and when the evaporation temperature is not greater than the preset evaporation temperature threshold, acquiring a difference value between the shell pipe water outlet temperature and the preset water outlet temperature threshold.
As described above, the preset outlet water temperature threshold, the preset antifreeze temperature threshold, and the preset evaporation temperature threshold are all preset thresholds, and the three temperatures are sequentially reduced. The shell and tube water outlet temperature is compared with a preset water outlet temperature threshold, if the shell and tube water outlet temperature is not greater than the preset water outlet temperature threshold, the antifreeze fluid temperature contrast in the next stage is needed, and if the antifreeze fluid temperature contrast is greater than the preset water outlet temperature threshold, the state that the shell and tube water outlet temperature, the antifreeze fluid temperature and the evaporation temperature in the natural cooling air conditioning unit are continuously detected is returned to S200. And when the antifreeze temperature in the second stage is compared, if the antifreeze temperature is not greater than the preset antifreeze temperature threshold, the risk of freezing the shell tube is indicated, the next stage of evaporation temperature comparison is carried out at the moment, and if the antifreeze temperature is greater than the preset antifreeze temperature threshold, the state that the shell tube water outlet temperature, the antifreeze temperature and the evaporation temperature in the natural cooling air conditioning unit are continuously detected is returned to S200. And when the evaporation temperature is compared in the third stage, if the evaporation temperature is not greater than the preset evaporation temperature threshold, the shell pipe is indicated to have the possibility of further temperature reduction, and the difference value between the shell pipe water outlet temperature and the preset water outlet temperature threshold is required to be acquired at the moment, so that the operation parameters of the water pump can be accurately adjusted based on the difference value in the follow-up process, the freezing danger is avoided, and if the evaporation temperature is greater than the preset evaporation temperature threshold, the state of continuously detecting the shell pipe water outlet temperature, the antifreeze solution temperature and the evaporation temperature in the natural cooling air conditioning unit is returned to S200.
In one embodiment, the method for controlling the freezing protection of the natural cooling air conditioning unit further includes:
acquiring a preset evaporation temperature threshold; when the evaporation temperature is not greater than the preset evaporation temperature threshold, acquiring a preset antifreeze temperature threshold; when the temperature of the antifreeze fluid is not greater than the preset antifreeze fluid temperature threshold, acquiring a preset water outlet temperature threshold; and when the shell pipe water outlet temperature is not greater than the preset water outlet temperature threshold value, acquiring a difference value between the shell pipe water outlet temperature and the preset water outlet temperature threshold value.
In this embodiment, whether the evaporation temperature is greater than a preset evaporation temperature threshold is detected first, then whether the antifreeze temperature is greater than a preset antifreeze temperature threshold is detected, and finally whether the casing water outlet temperature is greater than the preset water outlet temperature threshold is detected.
In one embodiment, the method for controlling the freezing protection of the natural cooling air conditioning unit further includes:
acquiring a preset water outlet temperature threshold, a preset antifreeze temperature threshold and a preset evaporation temperature threshold; and simultaneously comparing the shell pipe water outlet temperature with the preset water outlet temperature threshold, the antifreeze temperature with the antifreeze temperature threshold, and the evaporating temperature with the preset evaporating temperature threshold.
In this embodiment, the shell and tube water outlet temperature is compared with the preset water outlet temperature threshold, the antifreeze temperature is compared with the antifreeze temperature threshold, and the evaporating temperature is compared with the preset evaporating temperature threshold, and when the three temperatures are lower than the corresponding preset temperature thresholds, the difference between the shell and tube water outlet temperature and the preset water outlet temperature threshold is obtained.
As shown in fig. 3, in one embodiment, before S200, the method further includes:
s100: when the natural cooling air conditioning unit is detected to be electrified and started, the water pump is controlled to be started and operated with the maximum power.
When the water pump operates at the maximum frequency, the flow in the natural cooling surface cooler is maximum, the heat exchange capacity is maximum, and the natural cold source in the environment can be fully utilized. Therefore, after the natural cooling air conditioning unit is powered on and started, the water pump is controlled to start to operate at the maximum power.
In one embodiment, the determining the pump adjustment step according to the difference value includes:
acquiring a preset adjusting coefficient; and calculating the product of the difference value and the preset adjusting coefficient to obtain the water pump adjusting stride.
As already mentioned above, the difference value and the adjustment step may be a positively correlated function mapping, which may in particular be a linear function mapping in which the adjustment factor, here a preset adjustment factor, is used. The preset adjustment coefficient is preset and can be obtained through measurement and calculation in an experimental state. And calculating the product of the difference value and the preset regulating coefficient according to the preset regulating coefficient to obtain the regulating stride of the water pump.
In one embodiment, the method for controlling the freezing protection of the natural cooling air conditioning unit further includes:
acquiring the water outlet temperature of a plate type heat exchange component in the natural cooling air conditioner unit and presetting a water inlet temperature lower limit threshold; when the water outlet temperature of the plate type heat exchange component in the natural cooling air conditioner unit is lower than the preset water inlet temperature lower limit value, acquiring the water inlet temperature difference between the water outlet temperature and the preset water inlet temperature lower limit value; determining a water pump adjusting step according to the water inlet temperature difference; and entering the step of adjusting the operation parameters of the water pump according to the adjusting step to prevent the evaporation assembly in the natural cooling air conditioning unit from freezing.
The plate heat exchange assembly may in particular be a plate heat exchanger, which is in particular shown in fig. 1. In this embodiment, besides detecting the outlet water temperature of the shell and tube, the antifreeze temperature and the evaporation temperature to adjust the operation parameters of the water pump, the outlet water temperature of the plate heat exchange assembly is detected, and if the outlet water temperature of the plate heat exchange assembly is lower than the preset inlet water temperature lower limit value, the difference between the outlet water temperature and the inlet water temperature is obtained, so as to obtain the inlet water temperature difference. Similar to the adjustment process described above, we herein determine an adjustment step based on the inlet water temperature differential, and then adjust the pump operating parameters based on the adjustment step to prevent freezing of the evaporating components in the natural cooling air conditioning unit. It can be understood that the difference between the inlet water temperature and the above temperature is two different temperature differences, and the subsequent process of adjusting the operation parameters of the water pump after obtaining the two temperature differences is the same, which is not described herein.
In order to describe the technical scheme and the effect of the antifreeze control method of the natural cooling air conditioning unit in detail, a specific application example is adopted for description. As shown in fig. 4, the whole freezing prevention control method of the natural cooling air conditioning unit comprises the following steps:
1. starting up the natural cooling unit in a combined refrigeration mode, immediately starting up a natural cooling water pump and running at the maximum frequency, and continuously monitoring the shell and tube water outlet temperature Tout, the antifreezing temperature Td and the evaporating temperature Te;
2. when the shell and tube outlet temperature Tout < Tos (preset 7 ℃) and A (preset 0.5 ℃) are monitored, a second condition is judged, otherwise, the temperature is continuously monitored; at the moment, the water outlet temperature meets the requirement of a user for setting the water outlet temperature to 7 ℃;
3. when the antifreeze temperature Td is monitored to be less than Tds (preset 5 ℃), a third condition is judged, otherwise, the monitoring temperature is returned; at this time, the antifreezing temperature is reduced to below 5 ℃, and the shell tube has the risk of freezing;
4. when the evaporating temperature Te < Tes (preset 3 ℃) is detected, the water pump frequency is adjusted, otherwise, the monitoring temperature is returned; at the moment, the evaporation temperature is lower than the anti-freezing temperature, the water outlet temperature is possibly further reduced, the freezing risk of the shell tube is increased, and the frequency of the water pump is required to be adjusted;
5. Calculating a water temperature difference delta t=tos-tout=7-Tout;
6. calculating an adjustment step d=e=Δt=2 (7-Tout), wherein E is a preset adjustment coefficient, and here the value is 2;
7. the water pump adjusts the frequency according to the adjusting step D, the period is t (preset to 10 s), and the adjustment is carried out every 10 s.
It should be understood that, although the steps in the flowcharts described above are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in the flowcharts described above may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily sequential, and may be performed in turn or alternately with at least some of the other steps or stages.
As shown in fig. 5, the present application further provides an antifreezing control device for a natural cooling air conditioning unit, where the device includes:
The detection module 200 is used for detecting the outlet water temperature, the antifreeze solution temperature and the evaporation temperature of a shell pipe in the natural cooling air conditioning unit;
the difference module 400 is configured to obtain a difference between the shell-and-tube water outlet temperature and a preset water outlet temperature threshold when the shell-and-tube water outlet temperature, the antifreeze temperature and the evaporation temperature are not greater than the corresponding preset temperature thresholds;
a step determining module 600, configured to determine a pump adjustment step according to the difference;
the adjusting module 800 is configured to adjust the operation parameter of the water pump according to the adjustment step, so as to prevent the evaporation component in the natural cooling air conditioning unit from freezing.
According to the anti-freezing control device for the natural cooling air conditioning unit, the shell pipe water outlet temperature, the anti-freezing liquid temperature and the evaporation temperature in the natural cooling air conditioning unit are detected, and when the shell pipe water outlet temperature and the anti-freezing liquid temperature are lower than the corresponding preset temperature threshold values, the water pump adjusting step is adjusted according to the difference value between the shell pipe water outlet temperature and the preset water outlet temperature threshold value, so that the operation parameters of the water pump in the natural cooling air conditioning unit are adjusted, and the evaporation component in the natural cooling air conditioning unit is prevented from freezing. In the whole process, the freezing risk of the natural cooling air conditioning unit is identified by monitoring the water outlet temperature, the antifreeze temperature and the evaporating temperature of the shell pipe in the natural cooling air conditioning unit, and when the three temperatures are lower than a preset temperature threshold, the freezing of the evaporating component can be effectively prevented by adjusting the operation parameters of the water pump.
In one embodiment, the difference module 400 is further configured to obtain a preset outlet water temperature threshold; when the shell pipe water outlet temperature is not greater than the preset water outlet temperature threshold, acquiring a preset antifreeze temperature threshold; when the temperature of the antifreeze fluid is not greater than the preset antifreeze fluid temperature threshold, a preset evaporation temperature threshold is obtained; and when the evaporation temperature is not greater than the preset evaporation temperature threshold, acquiring a difference value between the shell pipe water outlet temperature and the preset water outlet temperature threshold.
In one embodiment, the difference module 400 is further configured to obtain a preset evaporation temperature threshold; when the evaporation temperature is not greater than the preset evaporation temperature threshold, acquiring a preset antifreeze temperature threshold; when the temperature of the antifreeze fluid is not greater than the preset antifreeze fluid temperature threshold, acquiring a preset water outlet temperature threshold; and when the shell pipe water outlet temperature is not greater than the preset water outlet temperature threshold value, acquiring a difference value between the shell pipe water outlet temperature and the preset water outlet temperature threshold value.
In one embodiment, the difference module 400 is further configured to obtain a preset outlet water temperature threshold, a preset antifreeze temperature threshold, and a preset evaporation temperature threshold; and simultaneously comparing the shell pipe water outlet temperature with the preset water outlet temperature threshold, the antifreeze temperature with the antifreeze temperature threshold, and the evaporating temperature with the preset evaporating temperature threshold.
In one embodiment, the anti-freezing control device of the natural cooling air conditioning unit further comprises a starting module, wherein the starting module is used for controlling the water pump to start and operate at the maximum power when the natural cooling air conditioning unit is detected to be electrified and started.
In one embodiment, the stride determination module 600 is further configured to obtain a preset adjustment coefficient; and calculating the product of the difference value and the preset adjusting coefficient to obtain the water pump adjusting stride.
In one embodiment, the difference module 400 is further configured to obtain a water outlet temperature of the plate heat exchange component in the natural cooling air conditioning unit and a preset water inlet temperature lower limit threshold; when the water outlet temperature of the plate type heat exchange component in the natural cooling air conditioner unit is lower than the preset water inlet temperature lower limit value, acquiring the water inlet temperature difference between the water outlet temperature and the preset water inlet temperature lower limit value; the stride determination module 600 is further configured to determine a pump adjustment stride based on the intake temperature difference.
For specific embodiments of the freezing control device of the natural cooling air conditioning unit, reference may be made to the above embodiments of the freezing control method of the natural cooling air conditioning unit, and the detailed description thereof will be omitted. All or part of the modules in the anti-freezing control device of the natural cooling air conditioning unit can be realized by software, hardware and a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
In addition, the application also provides a natural cooling air conditioning unit, which comprises a natural cooling air conditioning unit body and an anti-freezing control assembly, wherein the anti-freezing control assembly is arranged on the natural cooling air conditioning unit body;
the anti-freezing control assembly stores a computer program, and the steps of the anti-freezing control method of the natural cooling air conditioning unit are realized when the computer program is executed by the anti-freezing control assembly.
The natural cooling air conditioning unit comprises a natural cooling air conditioning unit body and an anti-freezing control component, the anti-freezing control component is used for identifying freezing risks of the natural cooling air conditioning unit by monitoring the water outlet temperature of a shell pipe, the temperature of anti-freezing liquid and the evaporating temperature of the natural cooling air conditioning unit, and the evaporating component can be effectively prevented from freezing by adjusting the operation parameters of the water pump when the three temperatures are lower than a preset temperature threshold.
In one embodiment, a computer device is provided, which may be a server, the internal structure of which may be as shown in fig. 6. The computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database of the computer equipment is used for storing data such as preset threshold values. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program, when executed by the processor, implements a method for controlling the freezing protection of a natural cooling air conditioning unit.
It will be appreciated by those skilled in the art that the structure shown in fig. 6 is merely a block diagram of some of the structures associated with the present application and is not limiting of the computer device to which the present application may be applied, and that a particular computer device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided comprising a memory and a processor, the memory having stored therein a computer program, the processor when executing the computer program performing the steps of:
detecting the outlet water temperature, the antifreeze solution temperature and the evaporation temperature of a shell pipe in the natural cooling air conditioning unit;
when the shell and tube water outlet temperature, the antifreeze solution temperature and the evaporation temperature are not larger than the corresponding preset temperature threshold values, obtaining a difference value between the shell and tube water outlet temperature and the preset water outlet temperature threshold value;
determining a water pump adjusting stride according to the difference value;
and adjusting the operation parameters of the water pump according to the adjusting steps so as to prevent the evaporation assembly in the natural cooling air conditioning unit from freezing.
In one embodiment, the processor when executing the computer program further performs the steps of:
Acquiring a preset outlet water temperature threshold; when the shell pipe water outlet temperature is not greater than the preset water outlet temperature threshold, acquiring a preset antifreeze temperature threshold; when the temperature of the antifreeze fluid is not greater than the preset antifreeze fluid temperature threshold, a preset evaporation temperature threshold is obtained; and when the evaporation temperature is not greater than the preset evaporation temperature threshold, acquiring a difference value between the shell pipe water outlet temperature and the preset water outlet temperature threshold.
In one embodiment, the processor when executing the computer program further performs the steps of:
acquiring a preset evaporation temperature threshold; when the evaporation temperature is not greater than the preset evaporation temperature threshold, acquiring a preset antifreeze temperature threshold; when the temperature of the antifreeze fluid is not greater than the preset antifreeze fluid temperature threshold, acquiring a preset water outlet temperature threshold; and when the shell pipe water outlet temperature is not greater than the preset water outlet temperature threshold value, acquiring a difference value between the shell pipe water outlet temperature and the preset water outlet temperature threshold value.
In one embodiment, the processor when executing the computer program further performs the steps of:
acquiring a preset water outlet temperature threshold, a preset antifreeze temperature threshold and a preset evaporation temperature threshold; and simultaneously comparing the shell pipe water outlet temperature with the preset water outlet temperature threshold, the antifreeze temperature with the antifreeze temperature threshold, and the evaporating temperature with the preset evaporating temperature threshold.
In one embodiment, the processor when executing the computer program further performs the steps of:
when the natural cooling air conditioning unit is detected to be electrified and started, the water pump is controlled to be started and operated with the maximum power.
In one embodiment, the processor when executing the computer program further performs the steps of:
acquiring a preset adjusting coefficient; and calculating the product of the difference value and the preset adjusting coefficient to obtain the water pump adjusting stride.
In one embodiment, the processor when executing the computer program further performs the steps of:
acquiring the water outlet temperature of a plate type heat exchange component in the natural cooling air conditioner unit and presetting a water inlet temperature lower limit threshold; when the water outlet temperature of the plate type heat exchange component in the natural cooling air conditioner unit is lower than the preset water inlet temperature lower limit value, acquiring the water inlet temperature difference between the water outlet temperature and the preset water inlet temperature lower limit value; determining a water pump adjusting step according to the water inlet temperature difference; and entering the step of adjusting the operation parameters of the water pump according to the adjusting step to prevent the evaporation assembly in the natural cooling air conditioning unit from freezing.
In one embodiment, a computer readable storage medium is provided having a computer program stored thereon, which when executed by a processor, performs the steps of:
Detecting the outlet water temperature, the antifreeze solution temperature and the evaporation temperature of a shell pipe in the natural cooling air conditioning unit;
when the shell and tube water outlet temperature, the antifreeze solution temperature and the evaporation temperature are not larger than the corresponding preset temperature threshold values, obtaining a difference value between the shell and tube water outlet temperature and the preset water outlet temperature threshold value;
determining a water pump adjusting stride according to the difference value;
and adjusting the operation parameters of the water pump according to the adjusting steps so as to prevent the evaporation assembly in the natural cooling air conditioning unit from freezing.
In one embodiment, the computer program when executed by the processor further performs the steps of:
acquiring a preset outlet water temperature threshold; when the shell pipe water outlet temperature is not greater than the preset water outlet temperature threshold, acquiring a preset antifreeze temperature threshold; when the temperature of the antifreeze fluid is not greater than the preset antifreeze fluid temperature threshold, a preset evaporation temperature threshold is obtained; and when the evaporation temperature is not greater than the preset evaporation temperature threshold, acquiring a difference value between the shell pipe water outlet temperature and the preset water outlet temperature threshold.
In one embodiment, the computer program when executed by the processor further performs the steps of:
acquiring a preset evaporation temperature threshold; when the evaporation temperature is not greater than the preset evaporation temperature threshold, acquiring a preset antifreeze temperature threshold; when the temperature of the antifreeze fluid is not greater than the preset antifreeze fluid temperature threshold, acquiring a preset water outlet temperature threshold; and when the shell pipe water outlet temperature is not greater than the preset water outlet temperature threshold value, acquiring a difference value between the shell pipe water outlet temperature and the preset water outlet temperature threshold value.
In one embodiment, the computer program when executed by the processor further performs the steps of:
acquiring a preset water outlet temperature threshold, a preset antifreeze temperature threshold and a preset evaporation temperature threshold; and simultaneously comparing the shell pipe water outlet temperature with the preset water outlet temperature threshold, the antifreeze temperature with the antifreeze temperature threshold, and the evaporating temperature with the preset evaporating temperature threshold.
In one embodiment, the computer program when executed by the processor further performs the steps of:
when the natural cooling air conditioning unit is detected to be electrified and started, the water pump is controlled to be started and operated with the maximum power.
In one embodiment, the computer program when executed by the processor further performs the steps of:
acquiring a preset adjusting coefficient; and calculating the product of the difference value and the preset adjusting coefficient to obtain the water pump adjusting stride.
In one embodiment, the computer program when executed by the processor further performs the steps of:
acquiring the water outlet temperature of a plate type heat exchange component in the natural cooling air conditioner unit and presetting a water inlet temperature lower limit threshold; when the water outlet temperature of the plate type heat exchange component in the natural cooling air conditioner unit is lower than the preset water inlet temperature lower limit value, acquiring the water inlet temperature difference between the water outlet temperature and the preset water inlet temperature lower limit value; determining a water pump adjusting step according to the water inlet temperature difference; and entering the step of adjusting the operation parameters of the water pump according to the adjusting step to prevent the evaporation assembly in the natural cooling air conditioning unit from freezing.
Those skilled in the art will appreciate that implementing all or part of the above-described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed may comprise the steps of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, or the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory. By way of illustration, and not limitation, RAM can be in the form of a variety of forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), and the like.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (10)
1. The anti-freezing control method for the natural cooling air conditioning unit is characterized in that the natural cooling air conditioning unit comprises a compressor, a shell and tube evaporator, a plate heat exchanger, a water pump and a surface cooler; the compressor is connected with the shell-and-tube evaporator, the plate heat exchanger, the water pump and the surface cooler form a loop for flowing the secondary refrigerant, the secondary refrigerant of the surface cooler exchanges heat with the environment and then enters the plate heat exchanger to exchange heat with the air conditioner water inlet, and then the air conditioner water inlet enters the shell-and-tube evaporator;
the anti-freezing control method of the natural cooling air conditioning unit comprises the following steps: detecting the outlet water temperature, the secondary refrigerant temperature and the evaporation temperature of a shell pipe in the natural cooling air conditioning unit;
When the shell and tube water outlet temperature, the secondary refrigerant temperature and the evaporation temperature are not larger than the corresponding preset temperature threshold values, obtaining a difference value between the shell and tube water outlet temperature and the preset water outlet temperature threshold value;
determining a water pump adjusting stride according to the difference value;
adjusting the operation parameters of the water pump according to the adjusting steps to prevent the evaporation assembly in the natural cooling air conditioning unit from freezing;
and determining the water pump adjusting stride according to the difference value comprises the following steps: and determining the water pump adjusting stride according to the difference value and the corresponding relation between the preset difference value and the water pump adjusting stride.
2. The method of claim 1, wherein when the shell-and-tube outlet temperature, the coolant temperature, and the evaporation temperature are all not greater than corresponding preset temperature thresholds, obtaining a difference between the shell-and-tube outlet temperature and a preset outlet temperature threshold comprises:
acquiring a preset outlet water temperature threshold;
when the shell and tube water outlet temperature is not greater than the preset water outlet temperature threshold, acquiring a preset secondary refrigerant temperature threshold;
when the temperature of the secondary refrigerant is not greater than the preset secondary refrigerant temperature threshold, acquiring a preset evaporation temperature threshold;
and when the evaporation temperature is not greater than the preset evaporation temperature threshold, acquiring a difference value between the shell pipe water outlet temperature and the preset water outlet temperature threshold.
3. The method of claim 1, wherein when the shell-and-tube outlet temperature, the coolant temperature, and the evaporation temperature are all not greater than corresponding preset temperature thresholds, obtaining a difference between the shell-and-tube outlet temperature and a preset outlet temperature threshold comprises:
acquiring a preset evaporation temperature threshold;
when the evaporation temperature is not greater than the preset evaporation temperature threshold, acquiring a preset secondary refrigerant temperature threshold;
when the temperature of the secondary refrigerant is not greater than the preset secondary refrigerant temperature threshold, acquiring a preset water outlet temperature threshold;
and when the shell pipe water outlet temperature is not greater than the preset water outlet temperature threshold value, acquiring a difference value between the shell pipe water outlet temperature and the preset water outlet temperature threshold value.
4. The method as recited in claim 1, further comprising:
acquiring a preset water outlet temperature threshold, a preset refrigerating medium temperature threshold and a preset evaporation temperature threshold;
and simultaneously comparing the shell and tube water outlet temperature with the preset water outlet temperature threshold, the secondary refrigerant temperature with the preset secondary refrigerant temperature threshold, and the evaporating temperature with the preset evaporating temperature threshold.
5. The method of claim 1, wherein prior to detecting the shell-and-tube outlet temperature, the coolant temperature, and the evaporation temperature in the free-cooling air conditioning unit, further comprises:
When the natural cooling air conditioning unit is detected to be electrified and started, the water pump is controlled to be started and operated with the maximum power.
6. The method of claim 1, wherein determining a pump adjustment step from the difference comprises:
acquiring a preset adjusting coefficient;
and calculating the product of the difference value and the preset adjusting coefficient to obtain the water pump adjusting stride.
7. The anti-freezing control device of the natural cooling air conditioning unit is characterized by comprising a compressor, a shell and tube evaporator, a plate heat exchanger, a water pump and a surface cooler; the compressor is connected with the shell-and-tube evaporator, the plate heat exchanger, the water pump and the surface cooler form a loop for flowing the secondary refrigerant, the secondary refrigerant of the surface cooler exchanges heat with the environment and then enters the plate heat exchanger to exchange heat with the air conditioner water inlet, and then the air conditioner water inlet enters the shell-and-tube evaporator;
the anti-freezing control device of the natural cooling air conditioning unit comprises:
the detection module is used for detecting the outlet water temperature, the secondary refrigerant temperature and the evaporation temperature of a shell pipe in the natural cooling air conditioning unit;
the difference module is used for acquiring a difference value between the shell and tube water outlet temperature and a preset water outlet temperature threshold when the shell and tube water outlet temperature, the secondary refrigerant temperature and the evaporation temperature are not larger than the corresponding preset temperature thresholds;
The stride determining module is used for determining the water pump adjusting stride according to the difference value;
the adjusting module is used for adjusting the operation parameters of the water pump according to the adjusting steps so as to prevent the evaporation assembly in the natural cooling air conditioning unit from freezing;
the stride determination module is further configured to determine a water pump adjustment stride according to the difference and a correspondence between a preset difference and the water pump adjustment stride.
8. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any of claims 1 to 6 when the computer program is executed.
9. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 6.
10. The natural cooling air conditioning unit is characterized by comprising a natural cooling air conditioning unit body and an anti-freezing control assembly, wherein the anti-freezing control assembly is arranged on the natural cooling air conditioning unit body;
the antifreeze control assembly stores a computer program which, when executed, implements the steps of the method of any of claims 1 to 6.
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| JP2019019797A (en) * | 2017-07-20 | 2019-02-07 | パナソニック株式会社 | Cogeneration system and operation method of the same |
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| CN112432272A (en) * | 2020-12-10 | 2021-03-02 | 珠海格力电器股份有限公司 | Anti-freezing natural cooling water chilling unit and control method and control device thereof |
| CN112682976A (en) * | 2021-01-15 | 2021-04-20 | 珠海格力电器股份有限公司 | Evaporative water chilling unit and control method thereof |
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