CN110243040B - Indirect evaporative cooling unit and water supply system and method thereof - Google Patents
Indirect evaporative cooling unit and water supply system and method thereof Download PDFInfo
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- CN110243040B CN110243040B CN201910520875.7A CN201910520875A CN110243040B CN 110243040 B CN110243040 B CN 110243040B CN 201910520875 A CN201910520875 A CN 201910520875A CN 110243040 B CN110243040 B CN 110243040B
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- water supply
- water
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- wet
- evaporative cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/85—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using variable-flow pumps
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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
- F24F11/89—Arrangement or mounting of control or safety devices
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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
- F24F5/0035—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 using evaporation
Abstract
The embodiment of the invention provides an indirect evaporative cooling unit and a water supply system and method thereof. Wherein indirect evaporative cooling unit's water supply system includes: the water inlet end of the first water supply pipeline is connected with a second water pump, the second water pump is connected with a water supply source, the water outlet end of the first water supply pipeline is connected with a water tank, and the water tank is connected with a nozzle water supply pipeline; the water inlet end of the second water supply pipeline is connected to the second water pump, and the water outlet end of the second water supply pipeline is directly connected with the nozzle water supply pipeline; the first switch is arranged on the first water supply pipeline and used for controlling the on-off of the first water supply pipeline; and the second switch is arranged on the second water supply pipeline and used for controlling the on-off of the second water supply pipeline. The embodiment of the invention utilizes the second water pump to provide the spraying water, does not need to supplement water to the unit, and saves water consumption; need not to use the inside water pump of unit after getting into the transition season, reduce the inside water pump of unit and open and stop the number of times to increase of service life.
Description
Technical Field
The invention relates to the technical field of information, in particular to a water supply system, a water supply method, a water supply device, an indirect evaporative cooling unit and a computer readable storage medium of the indirect evaporative cooling unit.
Background
The indirect evaporative cooling technology is taken as an efficient refrigeration technology and is adopted by data centers at home and abroad in a large scale. The technology realizes heat exchange between indoor circulating air and an outdoor cold source through the air-air heat exchanger to achieve a refrigeration effect. The working conditions of the indirect evaporative cooling refrigerating unit generally comprise dry working conditions, wet working conditions, auxiliary cold source working conditions and other operation working conditions. The wet working condition refers to the working state that the indirect evaporative cooling unit introduces external water supply, and water is sprayed on the surface of the air-air heat exchanger through the spraying device to realize evaporative cooling. The dry working condition refers to a working condition that water does not need to be sprayed on the surface of the air-air heat exchanger.
As mentioned before, when getting into wet operating mode operation, indirect evaporative cooling unit introduces the outside water supply, sprays water on empty heat exchanger surface through spray set, realizes the evaporative cooling of wet operating mode. A common indirect evaporative cooling unit is provided with a water tank, and an external water source is introduced to supplement water for the water tank, such as tap water, pure water equipment and the like. The water is pumped from the water tank through the water pump and supplied to the spraying device to realize water spraying. When the indirect evaporative cooling unit uses the fixed-frequency water pump, in transition seasons such as spring, summer and autumn and winter, the indirect evaporative cooling unit switches the operation process between a dry working condition and a wet working condition, and the control system gives a stop command to the water pump after the refrigeration effect generated in the evaporative cooling short time exceeds the required refrigeration capacity due to the large water supply amount of the fixed-frequency water pump. And when the cold quantity of the evaporative cooling is insufficient, the water pump is started again to carry out short-time spraying, and then the water pump is closed. The water pump is started and stopped repeatedly until the weather condition meets the dry working condition or the wet working condition of continuous operation, and the water pump keeps stopping operation or keeps continuous operation. In the transition season, the high-frequency starting and stopping operation of the water pump can generate adverse effects on the service life of the water pump and the energy consumption of a unit.
Disclosure of Invention
The embodiment of the invention provides a water supply system, a water supply method, a water supply device, an indirect evaporative cooling unit and a computer readable storage medium of the indirect evaporative cooling unit, which are used for solving one or more technical problems in the prior art.
In a first aspect, an embodiment of the present invention provides a water supply system for an indirect evaporative cooling unit, including:
the water inlet end of the first water supply pipeline is connected with a second water pump, the second water pump is connected with a water supply source, the water outlet end of the first water supply pipeline is connected with a water tank, and the water tank is connected with a nozzle water supply pipeline;
the water inlet end of the second water supply pipeline is connected to the second water pump, and the water outlet end of the second water supply pipeline is directly connected with the nozzle water supply pipeline;
the first switch is arranged on the first water supply pipeline and used for controlling the on-off of the first water supply pipeline;
and the second switch is arranged on the second water supply pipeline and used for controlling the on-off of the second water supply pipeline.
In one embodiment, a first water pump is further provided between the water tank and the nozzle water supply line.
In a second aspect, an embodiment of the present invention provides an indirect evaporative cooling unit, including a water supply system of the indirect evaporative cooling unit.
In a third aspect, an embodiment of the present invention provides a water supply method for an indirect evaporative cooling unit, including:
judging whether the running conditions of entering a transition season are met or not;
judging whether a wet working condition needs to be operated or not;
and under the conditions that the running condition in a transition season is met and the wet working condition needs to be operated, controlling the second water pump to be started, and turning on the second switch and turning off the first switch.
In one embodiment, determining whether the entering transition season operating condition is satisfied comprises:
and judging whether the running conditions in the transition season are met or not according to the dry-wet bulb temperature.
In one embodiment, determining whether a wet condition is to be operated comprises:
and under the condition that the outdoor fan operates at the highest operating frequency and the air supply temperature value exceeds the set upper limit value of the air supply temperature, determining that the indirect evaporative cooling unit needs to operate under a wet working condition.
In one embodiment, after controlling the second water pump to start, and turning on the second switch and turning off the first switch, the method further includes:
judging whether the wet condition needs to be exited or not;
and under the condition that the wet working condition needs to be exited, controlling the second water pump to be closed, and closing the second switch.
In one embodiment, determining whether exiting the wet condition is required includes:
and under the condition that the outdoor fan operates at the lowest operating frequency and the air supply temperature value is lower than the set air supply temperature lower limit value, determining that the indirect evaporative cooling unit needs to exit the wet working condition.
In one embodiment, in the case that the wet condition needs to be exited, the method further includes, after controlling the second water pump to be turned off and turning off the second switch:
judging whether the running condition of exiting the transition season is met or not according to the dry-wet bulb temperature;
under the condition that the running condition of exiting from the transition season is met, controlling the indirect evaporative cooling unit to select dry working condition running or wet working condition running according to weather conditions;
and returning to the step of judging whether the running conditions of the transition season are met.
In one embodiment, in the case that the wet condition needs to be exited, the method further includes, after controlling the second water pump to be turned off and turning off the second switch:
judging whether the running condition of exiting the transition season is met or not according to the dry-wet bulb temperature;
and under the condition that the running condition of exiting the transition season is not met, returning to the step of judging whether the wet working condition needs to be operated or not.
In a fourth aspect, an embodiment of the present invention provides a water supply device for an indirect evaporative cooling unit, where functions of the device may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-described functions.
In one possible design, the device includes a processor and a memory, the memory is used for storing a program for supporting the device to execute the water supply method for the indirect evaporative cooling unit, and the processor is configured to execute the program stored in the memory. The apparatus may also include a communication interface for communicating with other devices or a communication network.
In a fifth aspect, an embodiment of the present invention provides an indirect evaporative cooling unit, including the above water supply device for an indirect evaporative cooling unit.
In a sixth aspect, an embodiment of the present invention provides a computer readable storage medium for storing computer software instructions for a water supply device of an indirect evaporative cooling unit, which includes a program for executing the water supply method for the indirect evaporative cooling unit.
The technical scheme has the following advantages or beneficial effects: the second water pump is used for directly providing spraying water, water is not required to be supplemented to the unit, and water consumption is saved; need not to use the inside water pump of unit after getting into the transition season, reduce the inside water pump of unit and open and stop the number of times, extension inside water pump life of unit.
The foregoing summary is provided for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will be readily apparent by reference to the drawings and following detailed description.
Drawings
In the drawings, like reference numerals refer to the same or similar parts or elements throughout the several views unless otherwise specified. The figures are not necessarily to scale. It is appreciated that these drawings depict only some embodiments in accordance with the disclosure and are therefore not to be considered limiting of its scope.
Fig. 1 shows a schematic diagram of a prior art indirect evaporative cooling unit.
Fig. 2 shows a schematic structural diagram of an indirect evaporative cooling unit according to an embodiment of the present invention.
Fig. 3 shows a flow chart of a water supply method for an indirect evaporative cooling unit according to an embodiment of the present invention.
Fig. 4 shows a flow chart of a water supply method for an indirect evaporative cooling unit according to an embodiment of the present invention.
Fig. 5 shows a flow chart of a water supply method for an indirect evaporative cooling unit according to an embodiment of the present invention.
Fig. 6 shows a flow chart of a water supply method for an indirect evaporative cooling unit according to an embodiment of the present invention.
Fig. 7 shows a block diagram of a water supply device for an indirect evaporative cooling unit according to an embodiment of the present invention.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
Fig. 1 shows a schematic diagram of a prior art indirect evaporative cooling unit. The reference numerals in fig. 1 denote the following meanings: 10 is a first water supply line; 30 is a nozzle water supply pipeline; 50 is a first switch; 60 is an external water supply device; 70 is a first water pump; 80 is a nozzle; and 90 is a second water pump.
As shown in fig. 1, the indirect evaporative cooling unit of the prior art realizes that the water supply spray mainly realizes water circulation through a first water pump 70. The first water pump 70 is the water pump of the indirect evaporative cooling unit itself, also referred to as the internal water pump. A water supply pipeline for introducing an external water source into the unit supplies water to the water tank. Wherein the external water source may comprise tap water or pure water. An external water source is introduced through the external water supply 60 to supply water to the water tank inside the unit. The external water supply 60 may include a municipal non-negative pressure water supply or a pure water supply. In the transition season, after the indirect evaporative cooling unit sends out the wet condition operation requirement, namely sends out the demand that sprays, then first switch 50 opens and supplies water to the water tank. When the water tank liquid level sensor detects that the water tank liquid level meets the starting requirement of the first water pump 70, the first water pump 70 starts water supply spraying, and the indirect evaporative cooling unit operates under a wet working condition. The liquid level of the water tank is controlled by a water tank liquid level sensor or a water replenishing floating ball valve. And after the water tank liquid level sensor detects the liquid level high limit, the first switch 50 is closed, and water supplement is stopped. And when the indirect evaporative cooling unit is detected to provide abundant cold, sending a spraying stopping command to quit the operation under the wet working condition. When the indirect evaporative cooling unit sends a spraying stopping command, the first water pump 70 stops running, and the first switch 50 is closed to stop water supplement.
The indirect evaporative cooling unit of prior art is when the transition season moves, and the condition of switching operation between dry condition and the wet condition will appear in the unit, and when the wet condition of operation, the unit needs the moisturizing, and intermittent type nature opens the condition that stops will appear in the water pump. The frequent start and stop of the water pump can shorten the service life and influence the energy consumption of the unit.
Fig. 2 shows a schematic structural diagram of an indirect evaporative cooling unit according to an embodiment of the present invention. The reference numerals in fig. 2 denote the following meanings: 1 is a first water supply pipeline; 2 is a second water supply pipeline; 3 is a nozzle water supply pipeline; 4 is a second switch; 5 is a first switch; 6 is an external water supply device; 7 is a first water pump; 8 is a nozzle; and 9 is a second water pump.
As shown in fig. 2, the water supply system of the indirect evaporative cooling unit according to the embodiment of the present invention includes:
the water supply system comprises a first water supply pipeline 1, wherein the water inlet end of the first water supply pipeline 1 is used for being connected with a second water pump 9, the second water pump 9 is used for being connected with a water supply source, the water outlet end of the first water supply pipeline 1 is connected with a water tank, and the water tank is connected with a nozzle water supply pipeline 3;
a second water supply pipeline 2, wherein the water inlet end of the second water supply pipeline 2 is used for being connected to the second water pump 9, and the water outlet end of the second water supply pipeline 2 is directly connected with the nozzle water supply pipeline 3;
the first switch 5 is arranged on the first water supply pipeline 1 and is used for controlling the on-off of the first water supply pipeline 1;
and the second switch 4 is arranged on the second water supply pipeline 2 and is used for controlling the on-off of the second water supply pipeline 2.
In one embodiment, a first water pump 7 is also provided between the water tank and the nozzle feed line 3.
In one embodiment, the second switch 4 and the first switch 5 may be solenoid valves. The electromagnetic valve can be matched to realize expected control, and the control precision and flexibility can be ensured.
The external water supply 6 in fig. 2 includes a municipal non-negative pressure water supply or a pure water supply. When the indirect evaporative cooling unit supplies water by using tap water or pure water, a second water pump 9 is arranged on an external water supply pipeline, and the water is pressurized by the second water pump 9 to supply water to a water tank of the indirect evaporative cooling unit. In the embodiment of the invention, a second water supply pipeline 2 is added to the first water supply pipeline 1. That is, the second water supply line 2 is a bypass water supply line provided to the first water supply line 1 of the indirect evaporative cooling unit. Through set up second water supply pipe 2 in the unit, make indirect evaporative cooling unit provide the pressurization through the second water pump 9 on the outside water supply pipe way and spray the water supply in the season of passing through, and no longer provide through indirect evaporative cooling unit self water pump 7 and spray the water supply.
In one example, the conventional way for introducing municipal tap water into a data center or a machine room is to use a set of non-negative pressure water supply devices to supply water to a municipal water supply pipeline through the non-negative pressure devices after docking the municipal water supply pipeline. When municipal water supply pressure does not meet the water supply pressure of the data center or the machine room, the non-negative pressure device can start the second water pump 9 to lift the water supply pressure to meet the water supply requirement of the data center. When the indirect evaporative cooling unit uses tap water for spraying, the indirect evaporative cooling unit can send out a control command, and a non-negative pressure device is used for directly providing spraying water for the unit.
In another example, when the indirect evaporative cooling unit uses pure water for spraying, pure water produced by the pure water supply device may be introduced. The complete pure water supply device supplies water for the indirect evaporative cooling unit through a second water pump 9. The indirect evaporative cooling unit can send a control command, and a water supply pump used by the pure water supply device, namely the second water pump 9, directly provides spraying water for the unit.
The embodiment of the invention also provides an indirect evaporative cooling unit, which comprises a water supply system of the indirect evaporative cooling unit.
Fig. 3 shows a flow chart of a water supply method for an indirect evaporative cooling unit according to an embodiment of the present invention. As shown in fig. 3, the water supply method for the indirect evaporative cooling unit includes:
step S110, judging whether the running conditions of entering the transition season are met;
step S120, judging whether a wet working condition needs to be operated or not;
and S130, controlling the second water pump to start, and turning on the second switch and turning off the first switch under the conditions that the running condition in the transition season is met and the wet working condition needs to be operated.
Indirect evaporative cooling refers to a process of transferring the cold energy of wet air (secondary air) obtained by direct evaporative cooling to air to be treated (primary air) through a non-direct contact heat exchanger to realize air equal-humidity cooling.
In the operation process of the indirect evaporative cooling unit, heat exchange between indoor circulating air and an outdoor cold source is realized through the air-air heat exchanger, so that the refrigeration effect is achieved. The working conditions of the indirect evaporative cooling refrigerating unit generally comprise dry working conditions, wet working conditions, auxiliary cold source working conditions and other operation working conditions. The wet working condition refers to the working state that the indirect evaporative cooling unit introduces external water supply, and water is sprayed on the surface of the air-air heat exchanger through the spraying device to realize evaporative cooling. The dry working condition refers to a working condition that water does not need to be sprayed on the surface of the air-air heat exchanger.
The indirect evaporative cooling unit is provided with a water tank, and introduces external water sources such as tap water, pure water equipment and the like to replenish water for the water tank. In prior art, draw water from the water tank through the water pump of indirect evaporative cooling unit self and supply with spray set and realize the water shower, lead to in the transition season, the high-frequency of water pump opens and stops the operation and produce adverse effect to water pump life, unit energy consumption. Therefore, the embodiment of the invention provides a water supply method for an indirect evaporative cooling unit, so that the indirect evaporative cooling unit can realize unit spraying without using a water pump of the indirect evaporative cooling unit in a transition season, and the operation requirement of the unit is met.
As described above, the embodiment of the present invention adds a second water supply line 2 to the first water supply line 1. Also through set up second water supply pipeline 2 in the unit, make indirect evaporative cooling unit provide the pressurization through the second water pump on the outside water supply pipeline and spray the water supply in the season of passing through, and no longer provide through indirect evaporative cooling unit self water pump 7 and spray the water supply. Because the water pump 7 of the indirect evaporative cooling unit is not used for providing spraying water supply in the transition season, the starting and stopping times of the water pump in the unit are reduced, and the service life of the indirect evaporative cooling unit is prolonged.
In one embodiment, determining whether the entering transition season operating condition is satisfied comprises:
and judging whether the running conditions in the transition season are met or not according to the dry-wet bulb temperature.
Wherein the dry bulb temperature is a value read from a dry bulb temperature chart exposed to air without direct irradiation of the sun. It is the temperature measured by the thermometer in ordinary air, i.e. the temperature commonly said in ordinary weather forecasts. The dry bulb thermometer temperature is usually considered as the actual temperature of the measured air. The wet bulb temperature means: the temperature sensing part of a common thermometer is wrapped by wet gauze, the lower end of the gauze is soaked in water to maintain the air humidity of the temperature sensing part to be saturated, certain air circulation is kept around the gauze, and after the reading number reaches the stability, the reading number displayed by the thermometer at the moment is approximate to the temperature of a wet bulb.
During a transition season, such as during noon, the outdoor actual dry bulb temperature will exceed the outdoor dry bulb temperature upper limit required by the unit operating dry condition, causing the unit to enter the wet condition. The outdoor wet bulb temperature is low at this moment, and the unit can provide the refrigerating output that a large amount of water evaporation produced fast after the wet operating mode of operation, and the unit air supply temperature also can reduce thereupon this moment. In order to ensure the uniformity of the air supply temperature, the frequency of the outdoor fan of the unit is reduced to weaken the heat exchange effect of the outdoor air. However, when the outdoor fan is reduced to the lowest frequency, the cold quantity provided by the wet working condition is still too large, the unit stops spraying, and the uniformity of the air supply temperature is controlled by adjusting the outdoor fan. And (4) stopping spraying for a period of time because the temperature of the outdoor dry bulb is still higher than the upper limit value of the temperature required by the dry working condition, and if the spraying is stopped for one quarter or half hour, the unit enters the wet working condition again. The process of spraying and stopping spraying is repeated in this way. Whether the running condition of entering the transition season is met or not can be judged according to the dry-wet bulb temperature. For example, when the outdoor wet bulb temperature is lower than the lowest wet bulb temperature of the wet working condition operation, the condition of entering the transition season operation is judged to be satisfied.
In non-transition seasons, when the outdoor wet bulb temperature rises to a certain value, the unit enters a wet working condition to operate. But outdoor fan can not reduce to the minimum frequency under this kind of condition usually, and the unit will continue to operate wet operating mode this moment, no longer carries out the frequent switching between dry operating mode and the wet operating mode. Whether the running condition of entering the transition season is met or not can be judged according to the dry-wet bulb temperature. For example, in the case that the outdoor wet bulb temperature is higher than the minimum wet bulb temperature in the wet condition operation, the condition of entering the transition season operation is judged to be not satisfied.
In one embodiment, determining whether a wet condition is to be operated comprises:
and under the condition that the outdoor fan operates at the highest operating frequency and the air supply temperature value exceeds the set upper limit value of the air supply temperature, determining that the indirect evaporative cooling unit needs to operate under a wet working condition.
In one example, whether the air supply temperature value can be ensured to be within the set upper and lower limit range or not can be judged by judging whether the outdoor air is subjected to heat exchange through the air-air heat exchanger. If the air supply temperature value still exceeds the set air supply temperature upper limit value after the outdoor fan reaches the highest operation frequency, the unit needs to enter the wet working condition for operation.
Fig. 4 shows a flow chart of a water supply method for an indirect evaporative cooling unit according to an embodiment of the present invention. As shown in fig. 4, in an embodiment, the step S130, after controlling the second water pump to start, turning on the second switch, and turning off the first switch, further includes:
step S210, judging whether the wet condition needs to be exited or not;
and step S220, controlling the second water pump to be closed and closing the second switch under the condition that the wet working condition needs to be exited.
If the wet condition needs to be quitted as a result of the judgment in the step S210, the unit sends a water pump stop command to a water supply pump (a second water pump) of the non-negative-pressure water supply device or the pure water device, the wet condition stops running, and the second switch is turned off. And under the state that the second switch is closed, the second water supply pipeline stops supplying water for the unit.
In one embodiment, determining whether exiting the wet condition is required includes:
and under the condition that the outdoor fan operates at the lowest operating frequency and the air supply temperature value is lower than the set air supply temperature lower limit value, determining that the indirect evaporative cooling unit needs to exit the wet working condition.
In one example, in a state of operating in a wet condition, if the supply air temperature value is still lower than the set supply air temperature lower limit value after the outdoor fan reaches the lowest operating frequency, the unit needs to exit from the wet condition operation.
Fig. 5 shows a flow chart of a water supply method for an indirect evaporative cooling unit according to an embodiment of the present invention. As shown in fig. 5, in an embodiment, after controlling the second water pump to be turned off and turning off the second switch in the case that the wet condition needs to be exited, step S220 further includes:
step S310, judging whether the running condition of exiting the transition season is met or not according to the dry-wet bulb temperature;
step S320, under the condition that the running condition of the indirect evaporative cooling unit is met, controlling the indirect evaporative cooling unit to select dry working condition running or wet working condition running according to weather conditions;
returning to the step of judging whether the operation conditions for entering the transition season are met, namely returning to the step S110.
As mentioned above, whether the entering transition season operating condition is satisfied can be judged according to the dry-wet bulb temperature. For example, in the case that the outdoor wet bulb temperature is higher than the lowest wet bulb temperature in the wet condition operation, it is determined that the entering transition season operation condition is not satisfied, that is, the exiting transition season operation condition is satisfied. In one example, when summer enters spring, the condition of exiting the transition season is judged to be met according to the dry-wet bulb temperature, and the indirect evaporative cooling unit is controlled to select the wet working condition to operate according to the weather condition. At this time, the unit usually continuously operates in a wet condition in non-transition seasons, and frequent switching between the dry condition and the wet condition does not occur any more. The second switch is in a closed state, the second water supply pipeline is not used for supplying water for the unit, and the first water supply pipeline, the water tank and the first water pump are used for supplying water for the unit. And then returning to judge whether the running conditions of entering the transition season are met. When the climate change comes in autumn and the running condition of entering the transition season is judged to be met, the process is continuously and repeatedly executed.
Referring to fig. 5, in an embodiment, step S220, after controlling the second water pump to be turned off and turning off the second switch in the case that the wet condition needs to be exited, further includes:
step S310, judging whether the running condition of exiting the transition season is met or not according to the dry-wet bulb temperature;
and in the case that the condition of exiting the transition season operation is not met, returning to the step of judging whether the wet condition needs to be operated, namely returning to the step S120.
For example, in the event that the out-of-transition-season operating condition is not satisfied, it is still the transition season, i.e., there may also be a situation where a wet condition may need to be operated. And after the second switch is closed and the wet working condition is exited, returning to the step of judging whether the wet working condition needs to be operated, and continuing to repeatedly execute the process.
Fig. 6 shows a flow chart of a water supply method for an indirect evaporative cooling unit according to an embodiment of the present invention. As shown in fig. 6, an exemplary water supply method control flow for an indirect evaporative cooling unit may include the following steps:
and 6.1, selecting working conditions to operate the indirect evaporative cooling unit according to weather conditions.
And 6.21, judging whether the running conditions of entering the transition season are met. If not, step 6.22 is executed, and the current working condition operation is kept.
And 6.31, if the running condition of entering the transition season is met, judging whether the wet working condition of spraying operation is met. If not, step 6.32 is executed, and the current working condition operation is kept.
And 6.41, if the spraying operation wet working condition is met, the unit sends a second switch opening command. If the switch-on fails, step 6.42 is executed to send out a second switch-on failure alarm.
And 6.51, if the water pump is started successfully, the unit sends a water pump starting command to the complete water supply device, namely, the second water pump is started. If the starting fails, executing step 6.52 and sending out a water pump starting failure alarm.
And 6.61, if the water pump is started to operate, judging whether the unit exits the wet working condition or not. If not, executing step 6.62, and keeping the current working condition running.
And 6.71, if the wet working condition needs to be quitted, the unit sends a water pump stop command to the complete water supply device. If the water pump fails to be shut down, step 6.72 is executed, and a water pump shutdown failure alarm is sent out.
And 6.8, if the water pump stops running, judging whether the unit exits the transition season. If not, returning to execute the step 6.31; if yes, step 6.9 is executed, the unit closes the second switch, and then the step 6.1 is executed.
The technical scheme has the following advantages or beneficial effects: the embodiment of the invention directly provides the spraying water by using the second water pump on the non-negative pressure device or the pure water device, and water is not required to be supplemented to the unit, so that the water consumption is saved; need not to use the inside water pump of unit after getting into the transition season, reduce the inside water pump of unit and open and stop the number of times, extension inside water pump life of unit.
Fig. 7 shows a block diagram of a water supply device of an indirect evaporative cooling unit according to an embodiment of the present invention. As shown in fig. 7, the apparatus includes: a memory 910 and a processor 920, the memory 910 having stored therein computer programs operable on the processor 920. The processor 920, when executing the computer program, implements the water supply method for the indirect evaporative cooling unit in the above-described embodiment. The number of the memory 910 and the processor 920 may be one or more.
The device also includes:
and a communication interface 930 for communicating with an external device to perform data interactive transmission.
If the memory 910, the processor 920 and the communication interface 930 are implemented independently, the memory 910, the processor 920 and the communication interface 930 may be connected to each other through a bus and perform communication with each other. The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 7, but this is not intended to represent only one bus or type of bus.
Optionally, in an implementation, if the memory 910, the processor 920 and the communication interface 930 are integrated on a chip, the memory 910, the processor 920 and the communication interface 930 may complete communication with each other through an internal interface.
The embodiment of the invention provides an indirect evaporative cooling unit, which comprises the water supply device for the indirect evaporative cooling unit.
An embodiment of the present invention provides a computer-readable storage medium, which stores a computer program, and the computer program is used for implementing the method of any one of the above embodiments when being executed by a processor.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a separate product, may also be stored in a computer readable storage medium. The storage medium may be a read-only memory, a magnetic or optical disk, or the like.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive various changes or substitutions within the technical scope of the present invention, and these should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A water supply method for an indirect evaporative cooling unit, the indirect evaporative cooling unit comprising a water supply system, the water supply system comprising:
the water inlet end of the first water supply pipeline is connected with a second water pump, the second water pump is connected with a water supply source, the water outlet end of the first water supply pipeline is connected with a water tank, and the water tank is connected with a nozzle water supply pipeline; a first water pump is also arranged between the water tank and the nozzle water supply pipeline;
the water inlet end of the second water supply pipeline is connected to the second water pump, and the water outlet end of the second water supply pipeline is directly connected with the nozzle water supply pipeline;
the first switch is arranged on the first water supply pipeline and used for controlling the on-off of the first water supply pipeline;
the second switch is arranged on the second water supply pipeline and used for controlling the on-off of the second water supply pipeline;
the method comprises the following steps:
judging whether the running conditions of entering a transition season are met or not;
judging whether a wet working condition needs to be operated or not;
and under the conditions that the running condition in a transition season is met and the wet working condition needs to be operated, controlling the second water pump to be started, and turning on the second switch and turning off the first switch.
2. The method of claim 1, wherein determining whether the entering transition season operating condition is met comprises:
and judging whether the running conditions in the transition season are met or not according to the dry-wet bulb temperature.
3. The method of claim 1, wherein determining whether a wet condition is required comprises:
and under the condition that the outdoor fan operates at the highest operating frequency and the air supply temperature value exceeds the set upper limit value of the air supply temperature, determining that the indirect evaporative cooling unit needs to operate under a wet working condition.
4. The method according to any one of claims 1 to 3, further comprising, after controlling the second water pump to start, and turning on the second switch and turning off the first switch:
judging whether the wet condition needs to be exited or not;
and under the condition that the wet working condition needs to be exited, controlling the second water pump to be closed, and closing the second switch.
5. The method of claim 4, wherein determining whether exiting the wet condition is required comprises:
and under the condition that the outdoor fan operates at the lowest operating frequency and the air supply temperature value is lower than the set air supply temperature lower limit value, determining that the indirect evaporative cooling unit needs to exit the wet working condition.
6. The method of claim 4, wherein in the event that the wet condition needs to be exited, controlling the second water pump to shut down, and after shutting down the second switch, further comprising:
judging whether the running condition of exiting the transition season is met or not according to the dry-wet bulb temperature;
under the condition that the running condition of exiting from the transition season is met, controlling the indirect evaporative cooling unit to select dry working condition running or wet working condition running according to weather conditions;
and returning to the step of judging whether the running conditions of the transition season are met.
7. The method of claim 4, wherein in the event that the wet condition needs to be exited, controlling the second water pump to shut down, and after shutting down the second switch, further comprising:
judging whether the running condition of exiting the transition season is met or not according to the dry-wet bulb temperature;
and under the condition that the running condition of exiting the transition season is not met, returning to the step of judging whether the wet working condition needs to be operated or not.
8. A water supply device of an indirect evaporative cooling unit is characterized by comprising:
one or more processors;
storage means for storing one or more programs;
the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the method of any of claims 1-7.
9. An indirect evaporative cooling unit comprising a water supply as claimed in claim 8.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1 to 7.
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| CN112814071B (en) * | 2020-12-30 | 2022-11-04 | 北京达佳互联信息技术有限公司 | Water supply system and water supply method of indirect evaporative cooling unit |
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| CN2898679Y (en) * | 2005-12-09 | 2007-05-09 | 张文森 | Solar air-conditioner |
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| CN205482057U (en) * | 2016-02-04 | 2016-08-17 | 四川强劲工矿机械有限公司 | Circulation condensing equipment |
| GB2555558B (en) * | 2016-06-17 | 2020-10-28 | Ecocooling Ltd | Water quality control for evaporative cooler |
| CN206344013U (en) * | 2017-01-06 | 2017-07-21 | 东莞市玮明实业有限公司 | An a kind of key cleaning device for polisher lapper |
| CN207334933U (en) * | 2017-08-25 | 2018-05-08 | 葫芦岛市滨海宇通自动化控制有限公司 | Dehumidifier condensate water spraying ventilating device |
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| CN103245013A (en) * | 2013-05-24 | 2013-08-14 | 四川斯普信信息技术有限公司 | Latent heat energy saving device of outdoor machine of air conditioning unit |
| CN107940692A (en) * | 2017-11-10 | 2018-04-20 | 珠海格力电器股份有限公司 | Air-conditioning system and its control method |
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