CN113465441B - Control method of cooling tower and storage medium - Google Patents
Control method of cooling tower and storage medium Download PDFInfo
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- CN113465441B CN113465441B CN202110727680.7A CN202110727680A CN113465441B CN 113465441 B CN113465441 B CN 113465441B CN 202110727680 A CN202110727680 A CN 202110727680A CN 113465441 B CN113465441 B CN 113465441B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
- F28F27/003—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus specially adapted for cooling towers
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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
- F24F11/86—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
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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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 invention relates to the technical field of air conditioners, and particularly provides a control method of a cooling tower and a storage medium. The invention aims to solve the problem that the existing method for controlling the cooling fan of the cooling tower can cause the alarm shutdown of the compressor. The invention controls the cooling fan based on the relative value between the actual exhaust pressure and the actual suction pressure when the actual water temperature is between the first temperature threshold and the second temperature threshold. In the process of controlling the cooling fan, the influence of the relative value between the actual exhaust pressure and the actual suction pressure on the working capacity of the compressor is also considered on the basis of considering the influence of the actual water temperature on the working capacity of the compressor, so that the problem of alarm shutdown of the compressor is basically solved.
Description
Technical Field
The invention relates to the technical field of air conditioners, and particularly provides a control method of a cooling tower and a storage medium.
Background
The central air-conditioning unit comprises a refrigerant system and a cooling water system. In the process of refrigerating in summer, a compressor of a refrigerant system drives a refrigerant to circularly flow between a condenser and an evaporator, an electronic expansion valve is arranged between the condenser and the evaporator, and the refrigerant enters the condenser from an exhaust port of the compressor, flows to the evaporator after passing through the electronic expansion valve and finally flows back to an air suction port of the compressor. The condenser is arranged in the cooling water system, the cooling tower in the cooling water system comprises a water tank, a cooling fan and a sprayer, the cooling fan and the sprayer are arranged above the water tank, water in the water tank is pressurized by the water pump and then is sent to the sprayer, the water in the water tank is subjected to heat exchange with air formed by the cooling fan in the spraying process, and the condenser is cooled while water flow is cooled. Meanwhile, the evaporator is used for providing a cold source for the indoor unit of the air conditioner and reducing the temperature of a heat exchanger in the indoor unit of the air conditioner, and when an indoor fan in the indoor unit of the air conditioner works, negative pressure is generated to suck indoor air into the indoor unit of the air conditioner, and the indoor air is cooled by the heat exchanger and then blows cold air indoors.
The control of the cooling fan has a vital influence on the cooling effect of a cooling water system, and improper control of working parameters of the cooling fan can cause the temperature of cooling water to be too high and too low, so that the refrigeration effect of a central air conditioning unit is influenced; if the temperature of the cooling water is too low, the difference between the suction pressure and the exhaust pressure is too small, and the compressor can be alarmed and stopped when the compressor cannot return oil normally seriously.
At present, a cooling fan is generally controlled by monitoring the temperature of cooling water, the cooling fan is turned off when the temperature of the cooling water is lower than a first preset value, the cooling fan is turned on when the temperature of the cooling water is higher than a second preset value, and the current state of the cooling fan is maintained when the temperature of the cooling water is between the first preset value and the second preset value.
However, in the existing method for controlling the cooling fan, the first preset value and the second preset value are determined only according to experience, and because the first preset value and the second preset value are prone to have deviation, especially when the temperature of the cooling water is between the first preset value and the second preset value, there is a problem that the compressor may be shut down by alarm.
Accordingly, there is a need in the art for a new method of controlling a cooling tower and a storage medium to address the above-mentioned problems.
Disclosure of Invention
The invention aims to solve the technical problem, namely, the problem that the existing method for controlling the cooling fan of the cooling tower can cause the alarm shutdown of the compressor is solved.
In a first aspect, the present invention provides a control method of a cooling tower that is used as a device for cooling a condenser of an air conditioning unit; the control method comprises the following steps: acquiring the actual water temperature of a water outlet of the cooling tower; comparing the actual water temperature with a preset first temperature threshold and a preset second temperature threshold; wherein the first temperature threshold is less than the second temperature threshold; when the actual water temperature is between the first temperature threshold and the second temperature threshold, further acquiring the actual exhaust pressure and the actual suction pressure of a compressor in the air conditioning unit; calculating a relative value between the actual exhaust pressure and the actual suction pressure; and controlling a cooling fan of the cooling tower based on the relative value.
As a preferable aspect of the control method of the present invention, the step of "calculating a relative value between the actual exhaust pressure and the actual suction pressure" includes: calculating a difference between the actual discharge pressure and the actual suction pressure; alternatively, a ratio between the actual exhaust pressure and the actual intake pressure is calculated.
As a preferable aspect of the control method provided in the present invention, the step of "controlling the cooling fan based on the relative value" includes: comparing the relative value with a preset first relative threshold value and a preset second relative threshold value; wherein the first relative threshold is less than the second relative threshold; controlling the cooling fan to be turned off when the relative value is smaller than the first relative threshold value; controlling the cooling fan to be turned on when the relative value is greater than the second relative threshold value; and when the relative value is between the first relative threshold and the second relative threshold, controlling the cooling fan to maintain the current state.
As a preferable technical solution of the control method provided by the present invention, the step of "controlling the cooling fan based on the relative value" includes: searching an actual numerical value interval corresponding to the relative value in a plurality of preset numerical value intervals; and determining the rotating speed grade of the cooling fan based on the actual numerical value interval and a first mapping relation between a plurality of preset numerical value intervals and the rotating speed grade of the cooling fan.
As a preferable aspect of the control method provided in the present invention, the step of "controlling the cooling fan based on the relative value" includes: determining the rotating speed of the cooling fan based on the relative value and a pre-established calculation model of the rotating speed of the cooling fan, which dynamically changes along with the relative value; or, the rotating speed of the cooling fan is determined based on the relative value and a functional relation between the rotating speed of the cooling fan and the relative value which is established in advance.
As a preferable technical solution of the control method provided by the present invention, the step of "controlling the cooling fan based on the relative value" includes: the rotating speed of the cooling fan is positively correlated with the relative value.
As a preferable technical solution of the above control method provided by the present invention, the cooling tower further includes a water tank and a spray device disposed above the water tank, and a water pump is connected between the spray device and the water tank; the control method further comprises the following steps: and controlling the water pump based on the relative value.
As a preferable aspect of the control method according to the present invention, the step of "controlling the water pump based on the relative value" includes: controlling the water pump based on a second mapping relation between the rotating speed of the water pump and the actual water temperature and the relative value; in the second mapping relation, different water temperature intervals and different relative value intervals correspond to the unique rotating speed of the water pump; and the rotating speed of the water pump is positively correlated with the relative value in the same water temperature interval.
As a preferable technical solution of the above control method provided by the present invention, after the step of comparing the actual water temperature with the preset first temperature threshold and the second temperature threshold, the method further includes: turning off the cooling fan when the actual water temperature is less than the first temperature threshold; and when the actual water temperature is greater than the second temperature threshold value, the cooling fan is started.
In a second aspect, the present invention also provides a storage medium having stored thereon a control program of a cooling tower, which when executed by a processor, implements the control method of the cooling tower according to any one of the first aspect.
Under the condition of adopting the technical scheme, the cooling fan is controlled based on the relative value between the actual exhaust pressure and the actual suction pressure when the actual water temperature is between the first temperature threshold and the second temperature threshold. In the process of controlling the cooling fan, the influence of the relative value between the actual exhaust pressure and the actual suction pressure on the working capacity of the compressor is also considered on the basis of considering the influence of the actual water temperature on the working capacity of the compressor, so that the problem of alarm shutdown of the compressor is basically solved.
Further, the present invention controls the cooling fan to be turned off by controlling when the relative value between the actual discharge pressure and the actual suction pressure is smaller than the first relative threshold value; controlling the cooling fan to be started when the relative value between the actual exhaust pressure and the actual suction pressure is greater than a second relative threshold value; and controlling the cooling fan to maintain the current state when the relative value between the actual exhaust pressure and the actual suction pressure is between a first relative threshold value and a second relative threshold value. Therefore, the accurate control of the cooling fan is realized, and the problem of alarm shutdown of the compressor is reliably solved.
Drawings
The disclosure of the present invention will become more readily understood with reference to the accompanying drawings. As is readily understood by those skilled in the art: these drawings are for illustrative purposes only and are not intended to be a limitation on the scope of the present disclosure. Moreover, like numerals are used to indicate like parts throughout the figures. The control method of the cooling tower of the present invention will be described with reference to the accompanying drawings in conjunction with a central air conditioning unit.
In the drawings:
fig. 1 is a schematic structural diagram of an air conditioning unit according to the present embodiment;
FIG. 2 is a schematic structural view of a cooling tower according to the present embodiment;
fig. 3 is a schematic flow chart of a control method of the cooling tower according to the present embodiment.
List of reference numerals
1-a cooling tower; 11-a housing; 12-surface cooler; 121-a water inlet; 122-water outlet; 13-a fan;
21-a compressor; 22-a condenser; 23-an evaporator; 24-an electronic expansion valve;
3-a heat exchanger;
41-a first water circulation pipeline; 42-second water circulation pipeline.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Fig. 1 is a schematic structural diagram of an air conditioning unit according to this embodiment, in which a compressor 21 of a refrigerant system drives a refrigerant to circulate between a condenser 22 and an evaporator 23, and an electronic expansion valve 24 is further disposed between the condenser 22 and the evaporator 23. In the process of refrigerating in summer, the refrigerant enters the condenser 22 from the exhaust port of the compressor 21, then flows to the evaporator 23 through the electronic expansion valve 24, and finally flows back to the air suction port of the compressor 21.
In addition, the condenser 22 is also thermally connected to the cooling tower through the first water circulation pipeline 41 (or called as a cooling water pipeline), so as to cool the condenser by the cooling tower, for example, the first water circulation pipeline 41 may be connected to the water inlet 121 and the water outlet 122 of the water tank of the cooling tower, so that the cooling tower 1 may continuously supply cooling water to the condenser 22 in the refrigerant system to reduce the temperature of the condenser 22. The evaporator 23 is thermally connected to the heat exchanger 3 in the indoor unit of the air conditioner via a second water circulation line 42 (or chilled water line). At this time, the evaporator 23 is used for providing a cold source for the indoor unit of the air conditioner, reducing the temperature of the heat exchanger 3 in the indoor unit of the air conditioner, and when the indoor fan 13 in the indoor unit of the air conditioner works, negative pressure is generated to suck indoor air into the indoor unit of the air conditioner, cool the air through the heat exchanger 3 and blow out the cold air indoors.
Exemplarily, in a cooling tower 1 shown in fig. 2, the cooling tower 1 includes a housing 11, and a surface air cooler 12 and a fan 13 disposed in the housing 11, and the fan 13 is disposed on an air outlet side of the housing 11 of the cooling tower 1. After the fan 13 is started, air enters the periphery of the shell 11 of the cooling tower 1, and air flows through the airflow gap on the surface air cooler 13 to exchange heat with the surface air cooler 13 and then is discharged by the fan 13 on the upper part of the cooling tower 1. The surface cooler 12 is provided with a water inlet 121 and a water outlet 122 which are communicated with a coolant flow passage inside the surface cooler.
In addition, another form of cooling tower 1 includes a water tank, and a cooling fan 13 and a sprayer which are arranged above the water tank, and a water pump pressurizes water in the water tank and then sends the water to the sprayer, and exchanges heat with air formed by the cooling fan 13 in the spraying process, so that the cooling of the condenser 22 is realized while cooling water flow. The water tank cools the condenser 22 connected to the discharge end of the compressor 21 in the air conditioning unit by connecting a first water circulation line 41.
The control of the cooling fan 13 has a crucial influence on the cooling effect of the cooling water system, and improper control of the operating parameters of the cooling fan 13 may cause the temperature of the cooling water to be too high and too low, which affects the refrigeration effect of the central air conditioning unit, for example, if the temperature of the cooling water is too high, the discharge pressure of the compressor 21 may be too high and even exceed the pressure protection value, which may cause the alarm shutdown of the compressor 21; if the temperature of the cooling water is too low, the difference between the suction pressure and the discharge pressure is too small, and the compressor 21 is stopped by alarming when the compressor 21 cannot return oil normally seriously.
Currently, the cooling fan 13 is generally controlled by monitoring the temperature of the cooling water, the cooling fan 13 is turned off when the temperature of the cooling water is lower than a first preset value, the cooling fan 13 is turned on when the temperature of the cooling water is higher than a second preset value, and the current state of the cooling fan 13 is maintained when the temperature of the cooling water is between the first preset value and the second preset value.
However, in the above conventional method for controlling the cooling fan 13, the first preset value and the second preset value are determined only empirically, and there is a problem that the compressor 21 may be shut down by an alarm, especially when the temperature of the cooling water is between the first preset value and the second preset value, because the first preset value and the second preset value are prone to be different.
The present embodiment is intended to solve the above technical problem, that is, solve the problem that the existing method for controlling the cooling fan 13 of the cooling tower 1 may cause the alarm shutdown of the compressor 21.
In a first aspect, the present embodiment provides a control method of a cooling tower 1, the cooling tower 1 being an apparatus for cooling a condenser 22 of an air conditioning unit; the control method comprises the following steps:
s1, acquiring the actual water temperature of the water outlet 122 of the cooling tower 1.
For example, a temperature sensor may be arranged at the water outlet 122 of the cooling tower 1 shown in fig. 2 to obtain the actual water temperature at the water outlet 122.
S2, comparing the actual water temperature with a preset first temperature threshold and a preset second temperature threshold; wherein the first temperature threshold is less than the second temperature threshold.
Optionally, after step S2, the method further includes: when the actual water temperature is lower than the first temperature threshold, the cooling fan 13 is closed to increase the difference between the actual exhaust pressure and the actual suction pressure of the compressor to a reasonable range, so that the compressor is ensured to normally drive the refrigerant to flow, and the compressor is prevented from stopping; and when the actual water temperature is greater than the second temperature threshold value, the cooling fan 13 is started to reduce the exhaust pressure of the compressor to be within a reasonable range, and the alarm stop caused by the fact that the exhaust pressure of the compressor exceeds a protection value is avoided. Wherein the first temperature threshold and the second temperature threshold may be obtained from empirical values.
And S3, when the actual water temperature is between the first temperature threshold and the second temperature threshold, further acquiring the actual exhaust pressure and the actual suction pressure of the compressor 21 in the air conditioning unit.
It should be noted that, a pressure sensor may be arranged on a connection pipeline between the compressor 21 and the condenser 22 of the air conditioning unit shown in fig. 1 to detect the actual discharge pressure at the discharge end of the compressor 21; similarly, a pressure sensor may be disposed on the connection line between the compressor 21 and the evaporator 23 to detect the actual suction pressure at the suction end of the compressor 21.
And S4, calculating a relative value between the actual exhaust pressure and the actual suction pressure.
It should be noted that the calculation method of the relative value in step S4 may be to calculate a difference between the actual exhaust pressure and the actual intake pressure. Further, a ratio between the actual exhaust pressure and the actual intake pressure may also be calculated. Both of which may represent the relative magnitude between the actual discharge pressure and the actual suction pressure. It will be appreciated that the ratio or difference of the actual discharge pressure to the actual suction pressure of the compressor may be indicative of the magnitude of the actual discharge pressure relative to the actual suction pressure.
And S5, controlling the cooling fan 13 of the cooling tower 1 based on the relative value.
As a preferred implementation manner of the above control method provided in this embodiment, step S5 may include: comparing the relative value with a preset first relative threshold value and a preset second relative threshold value; wherein the first relative threshold is less than the second relative threshold; controlling the cooling fan 13 to be turned off when the relative value is smaller than the first relative threshold value; when the relative value is greater than the second relative threshold value, the cooling fan 13 is controlled to be turned on; and when the relative value is between the first relative threshold value and the second relative threshold value, controlling the cooling fan 13 to maintain the current state.
It will be appreciated that when the relative value is between the first relative threshold and the second relative threshold, it indicates that the actual discharge pressure of the compressor 21 is within a reasonable range relative to the actual suction pressure. When the relative value is smaller than the first relative threshold value, which indicates that the discharge pressure is smaller than the suction pressure, the discharge pressure of the compressor 21 can be increased by closing the condensing fan 13 to increase the water temperature of the cooling tower 1, so that the compressor 21 drives the refrigerant to normally flow, and the compressor 21 is prevented from being stopped. Similarly, when the relative value is greater than the second relative threshold, it indicates that the discharge pressure is greater than the suction pressure, and at this time, the condensing fan 13 may be turned on to reduce the water temperature of the cooling tower 1, thereby reducing the discharge pressure of the compressor 21, and reducing the discharge pressure to within a normal pressure range, thereby avoiding the shutdown of the compressor 21. Thus, more accurate control of the cooling fan 13 is achieved, and the problem of the alarm shutdown of the compressor 21 is reliably solved.
As a preferred implementation of the above control method provided in this embodiment, step S5 includes: searching an actual numerical value interval corresponding to the relative value in a plurality of preset numerical value intervals; the rotational speed level of the cooling fan 13 is determined based on the actual numerical range and a first mapping relationship between a plurality of preset numerical ranges and the rotational speed level of the cooling fan 13.
In the first map, a first map may be set in advance between a numerical range of relative values between the actual discharge pressure and the actual suction pressure of the compressor 21 and the rotational speed level of the cooling fan 13, and the rotational speed of the fan 13 is increased as the range of the plurality of numerical ranges is increased, that is, the rotational speed of the cooling fan 13 is positively correlated with the relative value.
As a preferred implementation of the above control method provided in this embodiment, step S5 includes: the rotation speed of the cooling fan 13 is determined based on the relative value and a calculation model in which the rotation speed of the cooling fan 13 dynamically changes with the relative value, which is established in advance.
It should be noted that the type of the calculation model can be selected, and the calculation model can be trained by using a large number of the rotation speeds and the relative values of the cooling fan 13, the input of the calculation model is the relative value of the actual discharge pressure and the actual suction pressure of the compressor 21, and the output of the calculation model is the rotation speed of the fan 13. Among them, the method of model training is already common and is not described herein. In the above calculation model, the rotation speed of the cooling fan 13 is positively correlated with the relative value.
As a preferred implementation of the above control method provided in this embodiment, step S5 includes: the rotational speed of the cooling fan 13 is determined based on the relative value and a functional relationship between the rotational speed of the cooling fan 13 and the relative value established in advance.
It should be noted that the functional relationship is a substantially simple calculation model, and the functional relationship between the rotation speed and the relative value of the cooling fan 13 can be established by solving the parameter values of the fitting function. In the above functional relationship, the rotation speed of the cooling fan 13 is positively correlated with the relative value.
In the case of adopting the above-described embodiment, the present embodiment controls the cooling fan 13 by also controlling the cooling fan 13 based on the relative value between the actual exhaust pressure and the actual intake pressure when the actual water temperature is between the first temperature threshold and the second temperature threshold. In the process of controlling the cooling fan 13, the influence of the relative value between the actual exhaust pressure and the actual suction pressure on the working capacity of the compressor 21 is also considered on the basis of considering the influence of the actual water temperature on the working capacity of the compressor 21, so that the problem of alarm shutdown of the compressor 21 is basically solved.
As a preferred implementation of the above control method provided in this embodiment, the cooling tower 1 further includes a water tank and a spray device disposed above the water tank, and a water pump is connected between the spray device and the water tank; the control method further comprises the following steps: and controlling the water pump based on the relative value.
The water tank may be connected to the first water circulation line 41, for example, via its water outlet 122. Or the water tank and the shower are used only for cooling the surface cooler 12 in the cooling tower 1, and the surface cooler 12 is connected to the first water circulation line 41 through the water outlet 122 thereof.
As a preferable implementation of the above control method provided in this embodiment, the step of "controlling the water pump based on the relative value" includes: controlling the water pump based on a second mapping relation between the rotating speed of the water pump and the actual water temperature and the relative value; in the second mapping relation, different water temperature intervals and different relative value intervals correspond to the unique rotating speed of the water pump; and the rotating speed and the relative value of the water pump in the same water temperature interval are in positive correlation.
It should be noted that although the detailed steps of the method of the present invention have been described in detail, those skilled in the art can combine, separate and change the order of the above steps without departing from the basic principle of the present invention, and the modified technical solution does not change the basic concept of the present invention and thus falls into the protection scope of the present invention.
In a second aspect, the present embodiment also provides a storage medium having stored thereon a control program of the cooling tower 1, the control program of the cooling tower 1, when executed by a processor, implementing the control method of the cooling tower 1 as in any one of the first aspects.
It should be noted that the storage medium may be a memory in the air conditioning unit, and the processor may be a controller specially used for executing the method of the present invention, or may be a functional module or a functional unit of a general controller.
The storage medium includes, but is not limited to, a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, an optical disk, a flash Memory, a volatile Memory, a non-volatile Memory, a serial Memory, a parallel Memory, or a register, and various media capable of storing program codes, and the processor includes, but is not limited to, a CPLD/FPGA, a DSP, an ARM processor, and an MIPS processor. Such well-known structures are not shown in the drawings in order to not unnecessarily obscure embodiments of the present disclosure.
The present invention may also be embodied as an apparatus or device program (e.g., PC program and PC program product) for carrying out a portion or all of the methods described herein. Such a program implementing the invention may be stored on a PC readable medium or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.
Of course, the above alternative embodiments, and the alternative embodiments and the preferred embodiments can also be used in a cross-matching manner, so that a new embodiment is combined to be suitable for a more specific application scenario.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims of the present invention, any of the claimed embodiments may be used in any combination.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is apparent to those skilled in the art that the scope of the present invention is not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. A control method of a cooling tower is characterized in that the cooling tower is used as a device for cooling a condenser of an air conditioning unit; the control method comprises the following steps:
acquiring the actual water temperature of a water outlet of the cooling tower;
comparing the actual water temperature with a preset first temperature threshold and a preset second temperature threshold; wherein the first temperature threshold is less than the second temperature threshold;
when the actual water temperature is between the first temperature threshold and the second temperature threshold, further acquiring the actual exhaust pressure and the actual suction pressure of a compressor in the air conditioning unit;
calculating a relative value between the actual exhaust pressure and the actual suction pressure;
and controlling a cooling fan of the cooling tower based on the relative value.
2. The control method according to claim 1, wherein the step of "calculating a relative value between the actual exhaust pressure and the actual suction pressure" includes:
calculating a difference between the actual discharge pressure and the actual suction pressure; alternatively, the first and second liquid crystal display panels may be,
a ratio between the actual exhaust pressure and the actual suction pressure is calculated.
3. The control method according to claim 2, wherein the step of controlling the cooling fan based on the relative value includes:
comparing the relative value with a preset first relative threshold value and a preset second relative threshold value; wherein the first relative threshold is less than the second relative threshold;
controlling the cooling fan to be turned off when the relative value is smaller than the first relative threshold value; controlling the cooling fan to be turned on when the relative value is greater than the second relative threshold value; and when the relative value is between the first relative threshold and the second relative threshold, controlling the cooling fan to maintain the current state.
4. The control method according to claim 2, wherein the step of "controlling the cooling fan based on the relative value" includes:
searching an actual numerical value interval corresponding to the relative value in a plurality of preset numerical value intervals;
and determining the rotating speed grade of the cooling fan based on the actual numerical value interval and a plurality of first mapping relations between the preset numerical value intervals and the rotating speed grade of the cooling fan.
5. The control method according to claim 2, wherein the step of controlling the cooling fan based on the relative value includes:
determining the rotating speed of the cooling fan based on the relative value and a pre-established calculation model of the rotating speed of the cooling fan along with the dynamic change of the relative value; alternatively, the first and second electrodes may be,
and determining the rotating speed of the cooling fan based on the relative value and a function relation between the rotating speed of the cooling fan and the relative value which is established in advance.
6. The control method according to claim 2, wherein the step of controlling the cooling fan based on the relative value includes:
the rotating speed of the cooling fan is positively correlated with the relative value.
7. The control method according to claim 2, wherein the cooling tower further comprises a water tank and a spray device arranged above the water tank, and a water pump is connected between the spray device and the water tank; the control method further comprises the following steps: and controlling the water pump based on the relative value.
8. The control method according to claim 7, wherein the step of "controlling the water pump based on the relative value" includes:
controlling the water pump based on a second mapping relation between the rotating speed of the water pump and the actual water temperature and the relative value;
in the second mapping relation, different water temperature intervals and different relative value intervals correspond to the unique rotating speed of the water pump; and the rotating speed of the water pump is positively correlated with the relative value in the same water temperature interval.
9. The control method according to claim 1, wherein the step of comparing the actual water temperature with the preset first and second temperature thresholds is followed by further comprising:
turning off the cooling fan when the actual water temperature is less than the first temperature threshold;
and when the actual water temperature is greater than the second temperature threshold value, the cooling fan is started.
10. A storage medium having stored thereon a control program for a cooling tower, which when executed by a processor implements the control method for a cooling tower according to any one of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110727680.7A CN113465441B (en) | 2021-06-29 | 2021-06-29 | Control method of cooling tower and storage medium |
| PCT/CN2022/097983 WO2023273827A1 (en) | 2021-06-29 | 2022-06-10 | Cooling tower control method and storage medium |
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| CN113465441B (en) * | 2021-06-29 | 2022-10-28 | 青岛海尔空调电子有限公司 | Control method of cooling tower and storage medium |
| CN115727514A (en) * | 2022-11-14 | 2023-03-03 | 中国联合网络通信集团有限公司 | Air conditioning equipment control method and device and readable storage medium |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5970724A (en) * | 1998-06-22 | 1999-10-26 | Yiue Feng Enterprise Co., Ltd. | Cooling water tower |
| CN102997510A (en) * | 2013-01-03 | 2013-03-27 | 刘玉岭 | Evaporative type condenser, refrigeration and air conditioning unit applies the same and control method thereof |
| CN205641710U (en) * | 2016-03-16 | 2016-10-12 | 广东美的暖通设备有限公司 | A air conditioning system for computer lab |
| CN106705742A (en) * | 2016-12-12 | 2017-05-24 | 万华化学集团股份有限公司 | Energy-saving control method for starting and stopping of circulating water packing cooling tower fans |
| CN109751911A (en) * | 2019-01-24 | 2019-05-14 | 珠海格力电器股份有限公司 | Blower fan of cooling tower frequency adaptive regulation method and air-conditioning system |
| CN110118509A (en) * | 2019-06-11 | 2019-08-13 | 珠海派诺科技股份有限公司 | A kind of blower fan of cooling tower energy-saving control method and system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113465441B (en) * | 2021-06-29 | 2022-10-28 | 青岛海尔空调电子有限公司 | Control method of cooling tower and storage medium |
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2021
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5970724A (en) * | 1998-06-22 | 1999-10-26 | Yiue Feng Enterprise Co., Ltd. | Cooling water tower |
| CN102997510A (en) * | 2013-01-03 | 2013-03-27 | 刘玉岭 | Evaporative type condenser, refrigeration and air conditioning unit applies the same and control method thereof |
| CN205641710U (en) * | 2016-03-16 | 2016-10-12 | 广东美的暖通设备有限公司 | A air conditioning system for computer lab |
| CN106705742A (en) * | 2016-12-12 | 2017-05-24 | 万华化学集团股份有限公司 | Energy-saving control method for starting and stopping of circulating water packing cooling tower fans |
| CN109751911A (en) * | 2019-01-24 | 2019-05-14 | 珠海格力电器股份有限公司 | Blower fan of cooling tower frequency adaptive regulation method and air-conditioning system |
| CN110118509A (en) * | 2019-06-11 | 2019-08-13 | 珠海派诺科技股份有限公司 | A kind of blower fan of cooling tower energy-saving control method and system |
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| Publication number | Publication date |
|---|---|
| CN113465441A (en) | 2021-10-01 |
| WO2023273827A1 (en) | 2023-01-05 |
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