CN111578470A - Spraying control method of air conditioning system - Google Patents
Spraying control method of air conditioning system Download PDFInfo
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- CN111578470A CN111578470A CN202010402220.2A CN202010402220A CN111578470A CN 111578470 A CN111578470 A CN 111578470A CN 202010402220 A CN202010402220 A CN 202010402220A CN 111578470 A CN111578470 A CN 111578470A
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- 238000005507 spraying Methods 0.000 title claims abstract description 194
- 238000004378 air conditioning Methods 0.000 title claims abstract description 102
- 238000000034 method Methods 0.000 title claims abstract description 72
- 238000001816 cooling Methods 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 125
- 239000007921 spray Substances 0.000 claims description 57
- 239000000498 cooling water Substances 0.000 claims description 32
- 230000005484 gravity Effects 0.000 claims description 9
- 239000000110 cooling liquid Substances 0.000 claims description 4
- 238000012360 testing method Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 9
- 230000002045 lasting effect Effects 0.000 description 9
- 239000007788 liquid Substances 0.000 description 7
- 238000004088 simulation Methods 0.000 description 6
- 239000002699 waste material Substances 0.000 description 5
- 238000007791 dehumidification Methods 0.000 description 3
- 238000004590 computer program Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000015654 memory Effects 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000002354 daily effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/36—Drip trays for outdoor units
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/46—Component arrangements in separate outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to the technical field of air conditioning, in particular to a spraying control method of an air conditioning system. The invention aims to solve the problem of higher operating power when the air conditioner is used in a power-limited area. For this purpose, the air conditioning system of the invention comprises a compressor, an outdoor heat exchanger, a throttling element, an indoor heat exchanger and a spraying device, wherein the spraying device is used for spraying and cooling the outdoor heat exchanger, and the spraying control method comprises the following steps: when the current operation period starts, judging whether the spraying device meets the starting condition; when the spraying device meets the starting condition, the starting time of the spraying device in the operation period is determined based on the outdoor environment temperature; controlling the spraying device to operate based on the starting time; wherein the opening duration is preset. The application can control the operation duration of the spraying device based on the current outdoor environment condition, so that the operation power of the air conditioning system is always kept in a lower power interval, and the normal operation of the air conditioner under the power limiting condition is realized.
Description
Technical Field
The invention relates to the technical field of air conditioning, in particular to a spraying control method of an air conditioning system.
Background
The air conditioner is taken as a high-power electric device, and the specific gravity of the electric power consumption of the air conditioner in the total household electric power consumption is very high, so how to reduce the running power of the air conditioner is a key point of attention of air conditioner manufacturers at present.
In tropical and underdeveloped areas, for example, because the economy is relatively slow and the power supply is insufficient, each household is provided with power-limiting measures to limit the daily maximum power consumption of the household, which results in the failure of high-power electrical appliances in the household. These areas are in hot zones and have a high annual temperature range, and therefore have a high demand for air conditioning. However, the power of the air conditioner is usually more than kilowatt, and the air conditioner belongs to high-power electric equipment, and if the air conditioner is frequently started, the rest electric equipment cannot be used simultaneously, and the condition of tripping is caused by overlarge power when the compressor runs at high frequency. Thus, in these regions, the operating demand for air conditioning versus the power limit become an irreconcilable conflict.
Accordingly, there is a need in the art for a new spray control method of an air conditioning system to solve the above problems.
Disclosure of Invention
In order to solve at least one of the above problems in the prior art, that is, in order to solve the problem of large operation power when an air conditioner is used in a power-limited area, the present invention provides a spray control method for an air conditioning system, wherein the air conditioning system comprises a compressor, an outdoor heat exchanger, a throttling element, an indoor heat exchanger, and a spray device, the spray device is used for performing spray cooling on the outdoor heat exchanger,
the spraying control method comprises the following steps:
when the current operation period starts, judging whether the spraying device meets the starting condition;
when the spraying device meets the starting condition, determining the starting time of the spraying device in the operation period based on the outdoor environment temperature;
and controlling the spraying device to operate based on the opening duration.
In a preferred technical solution of the above spraying control method of the air conditioning system, the start-up time period is set based on a water volume limit of the spraying device and a power limit of the air conditioning system.
In a preferred technical solution of the above spraying control method of an air conditioning system, the start-up time period is set such that:
and if the spraying device is controlled to continuously operate for a plurality of operation periods, the total water consumption of the spraying device is less than the water limit value, and the average operation power of the air conditioning system in the plurality of operation periods is less than the power limit value.
In a preferred embodiment of the foregoing spraying control method of an air conditioning system, the step of determining the on-time of the spraying device in the operation period based on the outdoor ambient temperature further includes:
when the outdoor environment temperature is greater than or equal to a first temperature threshold value, determining the starting time length as a first starting time length;
when the outdoor environment temperature is smaller than the first temperature threshold and is larger than or equal to a second temperature threshold, determining the starting time length as a second starting time length;
when the outdoor environment temperature is smaller than the second temperature threshold, determining the starting duration to be a third starting duration;
wherein the first temperature threshold is greater than the second temperature threshold; the first opening duration, the second opening duration and the third opening duration are sequentially reduced.
In a preferred technical solution of the spraying control method of the air conditioning system, the step of controlling the spraying device to operate based on the opening duration further includes:
when the specific gravity of the starting time length in the operation period is greater than a specific gravity threshold value, controlling the spraying device to continuously operate;
otherwise, controlling the spraying device to operate intermittently.
In a preferred technical scheme of the spraying control method of the air conditioning system, the spraying device comprises a cooling water tank and a spraying pipe, cooling liquid is stored in the cooling water tank, a first end of the spraying pipe is communicated with the cooling water tank, a second end of the spraying pipe is provided with a spraying hole and extends to the outdoor heat exchanger, and a water pump is arranged on the spraying pipe.
In a preferred technical scheme of the spraying control method of the air conditioning system, the spraying device further comprises an outdoor water receiving disc and a water return pipe, a water drainage hole is formed in an outdoor case of the air conditioning system, the outdoor water receiving disc is arranged below the water drainage hole, one end of the water return pipe is communicated with the outdoor water receiving disc, and the other end of the water return pipe is communicated with the cooling water tank.
In a preferred technical solution of the above spraying control method of an air conditioning system, the starting condition includes:
the outdoor environment temperature is greater than or equal to a third temperature threshold value and lasts for a first preset time;
the running frequency of the compressor is greater than a frequency threshold value and lasts for the first preset time;
and a water level alarm switch of the cooling water tank is in a closed state and lasts for the first preset time.
In a preferred embodiment of the above spraying control method for an air conditioning system, the spraying control method further includes:
when the spraying device runs, judging whether the spraying device meets a stopping condition;
and when the spray device meets the stop condition, controlling the spray device to stop running.
In a preferred embodiment of the above method for controlling spraying of an air conditioning system, the stop condition includes at least one of the following conditions:
the outdoor environment temperature is smaller than the third temperature threshold value and lasts for a second preset time;
the running frequency of the compressor is smaller than the frequency threshold value and lasts for a second preset time;
and the water level alarm switch of the cooling water tank is in an on state and lasts for a second preset time.
The technical scheme includes that the spraying device is arranged, and the starting time of the spraying device at different temperatures is preset, so that the spraying control method can control the operation time of the spraying device based on the current outdoor environment condition, the operation power of the air conditioning system is always kept in a lower power interval, and the normal operation of the air conditioner under the condition of power limitation is realized.
Furthermore, the time length of opening under different outdoor environment temperatures is set based on the water volume limit value and the power limit value, the balance of the running power and the spraying water volume can be realized, the spraying water is saved on the premise that the average running power of the air conditioning system is not higher than the power limit value, and the waste of water resources is avoided.
Further, through when opening for a long time account for the proportion of operation cycle different, control spray set continuous operation or intermittent operation, the control method that sprays of this application can also promote spray set's the effect of spraying for air conditioning system's operating power all is below the power limit value in the operating cycle most of time.
Furthermore, through setting up outdoor water collector and wet return, still make the shower water can cyclic utilization, further practiced thrift the water consumption that sprays.
Furthermore, whether the spraying device is started or not is judged jointly through the combination of the outdoor environment temperature, the running frequency of the compressor and the water level alarm switch of the cooling water tank, the spraying control method can also improve the starting judgment accuracy of the spraying device, and the unnecessary starting of the spraying device is avoided.
Furthermore, when the exit condition is met through one of the outdoor environment temperature, the running frequency of the compressor and the water level alarm switch of the cooling water tank, the spraying device is controlled to stop running, the spraying control method can also control the spraying device to exit spraying in time, and waste of the spraying water quantity and failure of the air conditioning system are avoided.
Drawings
The spray control method of the air conditioning system of the present invention is described below with reference to the accompanying drawings. In the drawings:
fig. 1 is a system diagram of an air conditioning system in a first embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating the spraying direction of the spraying pipe according to the first embodiment of the present invention;
fig. 3 is a flowchart of a spray control method of an air conditioning system in a first embodiment of the present invention;
fig. 4 is a flowchart of a preferred embodiment of a spray control method of an air conditioning system in a first embodiment of the present invention;
FIG. 5 is a system diagram of an air conditioning system in a second embodiment of the present invention;
FIG. 6 is a schematic view of the spraying direction of the spraying pipe in the third embodiment of the invention;
fig. 7 is a logic diagram of a spray control method of an air conditioning system in one possible embodiment of the invention.
Reference numeralsLists
1. A compressor; 2. an outdoor heat exchanger; 21. an outer fan; 22. an outdoor water pan; 23. a water return pipe; 3. a throttling element; 4. an indoor heat exchanger; 41. an inner fan; 42. an indoor water pan; 43. a condensate pipe; 5. a spraying device; 51. a cooling water tank; 52. a shower pipe; 53. a water pump; 54. a liquid level valve; 6. a chassis; 61. a drain hole.
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. For example, although the dehumidification control method is described in connection with an air conditioning system in a single cooling mode, this is not intended to limit the scope of the present application, and those skilled in the art may apply the dehumidification control method to other air conditioning systems without departing from the principles of the present application. For example, the dehumidification control method of the present application may also be applied to an air conditioning system with a four-way valve, and the like.
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.
Examples1
Referring first to fig. 1 and 2, an air conditioning system of the present invention will be described. Fig. 1 is a system diagram of an air conditioning system according to a first embodiment of the present invention; fig. 2 is a schematic diagram of the spraying direction of the spraying pipe in the first embodiment of the invention.
As shown in fig. 1, in the present embodiment, the air conditioning system mainly includes a compressor 1, an outdoor heat exchanger 2, an external fan 21, a throttling element 3, an indoor heat exchanger 4, an internal fan 41, a spraying device 5, and a general controller (not shown in the figure). The compressor 1, the outdoor heat exchanger 2, the outer fan 21, the throttling element 3 and the general controller are arranged in the outdoor case 6, and the indoor heat exchanger 4 and the inner fan 41 are arranged in the indoor unit. The compressor 1, the outdoor heat exchanger 2, the throttling element 3 and the indoor heat exchanger 4 are connected through refrigerant pipes to form refrigerant circulation. The master controller is respectively connected with the compressor 1, the outer fan 21, the throttling element 3 and the inner fan 41 and used for controlling the operation of the components. In this embodiment, the throttle element 3 may be a valve body with a controllable opening degree, such as an electronic expansion valve.
It should be noted that, in the present embodiment, in order to clearly describe the connection relationship between the above components, the components of the outdoor unit are broken up and drawn in fig. 1, and those skilled in the art can understand that the installation positions of the components in the drawing are not actual installation positions.
Continuing to refer to fig. 1, the spraying device 5 includes a cooling water tank 51 and a spraying pipe 52, the cooling water tank 51 stores cooling liquid, a first end of the spraying pipe 52 is communicated with the cooling water tank 51, a second end is provided with a spraying hole and extends to the outdoor heat exchanger 2, and a water pump 53 is arranged on the spraying pipe 52. Specifically, a water replenishing port (not shown in the figure) is arranged on the side wall of the cooling water tank 51, the water replenishing port is communicated with municipal water through a liquid level valve 54, and the height of the water replenishing port can be set in the following way: as close as possible to the bottom of the cooling water tank 51, while ensuring adequate circulation of the water. The liquid level valve 54 is a valve body capable of automatically opening and closing according to the level of the liquid in the cooling water tank 51 in the present embodiment, and the liquid level valve 54 may be a liquid level ball valve or a combination of a liquid level sensor and an electromagnetic valve.
The outdoor heat exchanger 2 is generally L-shaped in cross section, and the second end of the shower pipe 52 extends along the air intake side of the outdoor heat exchanger 2. The second end of the shower pipe 52 may be provided with a plurality of shower holes, and the plurality of shower holes may be all arranged at the second end of the shower pipe 52, or may be respectively arranged on a plurality of sub-pipes arranged in parallel at the second end. Referring to fig. 2, in the present embodiment, the second end of the shower pipe 52 is disposed close to the outdoor heat exchanger 2, and the shower hole faces the outdoor heat exchanger 2 and forms an angle with the horizontal plane, which may be selected from 30 ° to 60 °, and preferably, may be selected from 45 °. The master controller of the air conditioning system is also connected with the water pump 53 and used for controlling the start and stop of the water pump 53.
When the spraying device 5 is started in the operation process of the air conditioning system, namely the water pump 53 is controlled to be powered on, the cooling liquid in the cooling water tank 51 is sprayed onto the coil of the outdoor heat exchanger 2 by the spraying pipe 52 under the driving of the water pump 53 to exchange heat with the heat exchange coil of the outdoor heat exchanger 2, the temperature of the heat exchange coil is reduced, the heat exchange effect of the outdoor heat exchanger 2 is improved, and the purpose of reducing the operation power of the air conditioning system is achieved.
Referring to fig. 3, a spray control method of the air conditioning system of the present application will be described. Fig. 3 is a flowchart of a spray control method of an air conditioning system according to a first embodiment of the present invention.
As described in the background art, in a home in an existing underdeveloped area, power limiting measures are usually taken, for example, the maximum power consumption of each household is 1200W each day, while the maximum operating power of an air conditioner is usually over 1000W, if the air conditioner is turned on, it is likely that other electric devices cannot be used simultaneously with the air conditioner or trip due to the excessively high operating power of the air conditioner, and the use requirement of the user on the air conditioner cannot be met.
As shown in fig. 3, in order to solve the problem of large operating power when an air conditioner is used in a power-limited area, the spray control method of the present application includes:
s101, when the current operation period starts, judging whether the spraying device 5 meets the starting condition; for example, the operation period may take any value from 10min to 120min, and when each operation period starts, it is determined whether the spray device 5 satisfies the start condition.
As will be understood by those skilled in the art, when the operating power of the air conditioning system is increased, especially when the operating power of the air conditioning system is increased to a higher power value, it is necessary to control the power of the air conditioning system to be decreased or to suppress the power from being further increased, so as to avoid the occurrence of a trip or the like caused by an excessively high operating power of the air conditioning system. At this moment, whether the operating power of the air conditioning system has an excessive risk or not can be judged through environmental parameters or operating parameters of the air conditioning system, and therefore the spraying device 5 is started in advance to spray and cool the outdoor heat exchanger 2 when the excessive risk exists, the heat exchange effect of the outdoor heat exchanger 2 is improved, and the operating power of the air conditioning system is reduced. Of course, the operation period is not limited to the above exemplary time range, and those skilled in the art can make appropriate adjustments based on the specific application scenario.
S103, when the spraying device 5 meets the starting condition, determining the starting time of the spraying device 5 in the operation period based on the outdoor environment temperature; for example, when the spray device 5 satisfies the turn-on condition, the turn-on duration at the current outdoor ambient temperature is determined by a preset correspondence table or a fitting formula between the turn-on duration and the outdoor ambient temperature.
Those skilled in the art can understand that when the spraying device 5 meets the opening condition, it is proved that the air conditioning system has a risk of having too high operating power, and the operating power needs to be reduced by means of spraying and cooling, at this time, based on the outdoor environment temperature, the opening time of the spraying device 5 in the current operating cycle is further determined, for example, when the operating cycle is 30min, if the outdoor environment temperature is 35 ℃, the opening time is determined to be 10min through the corresponding relation table, and if the outdoor environment temperature is 40 ℃, the opening time is determined to be 20min through the corresponding relation table.
S105, controlling the spraying device 5 to operate based on the starting duration; for example, after the on-time period is determined, the spray device 5 is controlled to start and operate according to the on-time period in the current operation period.
Those skilled in the art can understand that when the spraying device 5 operates according to the on-time, in the whole operation period, the heat exchange effect of the outdoor heat exchanger 2 under the spraying of the spraying device 5 is greatly improved, the further increase of the operation power is inhibited, or the operation power is reduced, so that the air conditioning system continuously operates in a lower power interval.
From the above description, it can be seen that by setting the spraying device 5 and presetting the opening time of the spraying device 5 at different temperatures, the spraying control method of the present application can control the operation time of the spraying device 5 based on the current outdoor environment condition, so that the operation power of the air conditioning system is always kept in a lower power interval, and the normal operation of the air conditioner under the condition of power limitation is realized. In addition, structurally through being close to outdoor heat exchanger 2 with shower 52 second end and the hole slant 45 settings that sprays, can furthest's assurance spray area and spray the effect.
Next, a more preferred embodiment of the spray control method of the present application will be described with reference to fig. 4. Fig. 4 is a flowchart of a preferred embodiment of a spray control method of an air conditioning system according to a first embodiment of the present invention.
As shown in fig. 4, in a preferred embodiment, the spraying control method of the air conditioning system of the present application includes the following steps:
firstly, executing step S201 to obtain the outdoor environment temperature, the running frequency of the compressor 1 and the water level alarm switch state of the cooling water tank 51; the method for acquiring the outdoor environment temperature, the operation frequency of the compressor 1 and the state of the water level alarm switch belongs to the common technology in the field, and is not described herein again.
Then S203 is executed, and whether the spraying device 5 meets the starting condition is judged; if the starting condition is met, further executing step S205 to determine whether the outdoor environment temperature is greater than the first temperature threshold; otherwise, when the spraying device 5 does not satisfy the opening condition, step S223 is executed to determine whether the current operation cycle is finished.
Specifically, in the present application, the turn-on conditions include: the outdoor environment temperature is greater than or equal to a third temperature threshold value and lasts for a first preset time; the running frequency of the compressor 1 is greater than a frequency threshold value and lasts for a first preset time; the water level alarm switch of the cooling water tank 51 is in a closed state and lasts for a first preset time.
For example, the third temperature threshold may be 30 ℃, when the outdoor ambient temperature is greater than or equal to 30 ℃, the heat exchange effect when the outdoor heat exchanger 2 operates is poor, and the air conditioning system needs to increase the operation power to enhance the heat exchange effect. The frequency threshold may be 40Hz, and when the operating frequency of the compressor 1 is equal to or greater than 40Hz, the operating power of the air conditioning system is generally high. When the water level alarm switch is in the off state, it is proved that the water in the cooling water tank 51 is enough to spray at this time. The first preset time can be 2min, the judgment result can be more accurate due to the arrangement of the first preset time, and the parameter fluctuation influence in the judgment process can be effectively eliminated. When the above conditions are all satisfied and last for 2min, it is proved that there is a risk of an excessively high operating power of the air conditioning system, and the spraying device 5 is also provided with a spraying condition. At this time, the on-time of the spraying device 5 needs to be further judged, and the spraying device 5 is controlled to operate based on the on-time. Of course, the specific values of the third temperature threshold, the frequency threshold and the first preset time period are only used as examples in this application, and those skilled in the art can make reasonable adjustments based on the actual situation.
Whether the spraying device 5 is started or not is judged by combining the outdoor environment temperature, the running frequency of the compressor 1 and the water level alarm switch of the cooling water tank 51, the spraying control method can improve the starting judgment accuracy of the spraying device 5, and the unnecessary starting of the spraying device 5 is avoided.
With continued reference to fig. 4, when step S205 is executed, it is determined whether the outdoor ambient temperature is greater than or equal to the first temperature threshold; when the outdoor environment temperature is greater than or equal to the first temperature threshold, step S207 is executed, and the spraying device 5 is controlled to operate for a first starting time period; otherwise, when the outdoor environment temperature is less than the first temperature threshold, step S209 is executed to further determine whether the outdoor environment temperature is less than the second temperature threshold; when the outdoor environment temperature is greater than or equal to the second temperature threshold and less than the first temperature threshold, step S213 is executed, and the spraying device 5 is controlled to operate for a second starting time period; otherwise, when the outdoor ambient temperature is less than the second temperature threshold, step S211 is executed to control the spraying device 5 to operate for the third opening duration. Wherein the first temperature threshold is greater than the second temperature threshold; the first opening duration, the second opening duration and the third opening duration are sequentially reduced.
For example, in the present embodiment, the first temperature threshold may be 40 ℃, the second temperature threshold may be 35 ℃, the third temperature threshold may be 30 ℃, the operation cycle may be 60min, the first opening time period may be 60min, the second opening time period may be 40min, and the third opening time period may be 20 min. When the outdoor environment temperature is more than or equal to 40 ℃, the outdoor environment temperature is extremely high, the heat exchange effect of the outdoor heat exchanger 2 is extremely poor, the operation power limit value can be in a lower power interval only by long-time and uninterrupted spraying, and the spraying device 5 is controlled to spray in the whole operation period so as to effectively reduce the operation power of the air conditioning system. When the outdoor environment temperature is less than 40 ℃ but more than 35 ℃, although the temperature is reduced compared with 40 ℃, the current outdoor environment temperature is still in a higher temperature interval, and although the whole operation cycle is not used for continuously spraying, the spraying time is also required to be longer, so that the spraying device 5 is controlled to spray for 40min in the operation cycle of 60min, so that the operation power of the air conditioning system is in a lower power interval. When the outdoor environment temperature is lower than 35 ℃ (the temperature is higher than 30 ℃) and the outdoor environment temperature is further reduced compared with 35 ℃, the starting time can be further reduced to 20min, and therefore the spraying water quantity is saved on the basis of ensuring that the operating power of the air conditioning system is in a lower power range. Of course, the specific values of the first temperature threshold, the second temperature threshold, the third temperature threshold, the first opening duration, the second opening duration and the third opening duration are only used as examples in this application, and those skilled in the art can make reasonable adjustments based on the actual situation.
In a preferred embodiment, the process of controlling the operation of the spraying device 5 may specifically be: when the specific gravity of the starting time length in the operation period is greater than the specific gravity threshold value, controlling the spraying device 5 to continuously operate; otherwise, the spraying device 5 is controlled to operate intermittently.
For example, the specific gravity threshold may be 70%, and when the determined on-time is greater than or equal to 70%, it is proved that the on-time of the spraying device 5 in the whole operation period is longer, and the off-time is shorter, and at this time, the spraying device 5 may be controlled to continuously operate, so as to ensure the stability of spraying. On the contrary, when the on-time is less than 70%, it proves that the off-time of the spraying device 5 in the whole operation period is longer, and if the spraying device 5 is continuously operated, the operation power of the air conditioning system is likely to rise to a higher power interval when the spraying device 5 is in the off state, so that the spraying device 5 is preferably controlled by adopting an intermittent operation mode at this time, so as to ensure that the operation power of the air conditioning system is kept in a lower power interval in the whole operation period. Of course, the specific value of the specific gravity threshold is not only used as an example in the present application, and those skilled in the art can make reasonable adjustments based on the actual situation.
Through when opening for a long time account for the proportion of operation cycle different, control spray set 5 continuous operation or intermittent operation, the control method that sprays of this application can also promote spray set 5's the effect of spraying for air conditioning system's operating power all is below the power limit value in operating cycle most of time.
In a preferred embodiment, the first opening time, the second opening time and the third opening time are set based on a water amount limit of the spraying device 5 and a power limit of the air conditioning system.
For example, if the maximum power consumption of a test household is 1200W per day, the power limit may be set to 800W, so as to reserve a certain power consumption for other electric devices. The water amount limit value can be comprehensively set based on the climate condition of the area where the test family is located, the water resource abundance degree of the area and other factors, and for saving the spraying water amount as much as possible, the water amount limit value can be set to 30L every day. On the premise of setting the output power limit value and the water quantity limit value, the air conditioning system is subjected to a simulation test based on the climate condition of the place where the test family is located, the temperature change of the test family in a plurality of days is continuously simulated, the normal operation of the air conditioning system is controlled based on the temperature change, and the proportion of the operation duration of the spraying device 5 in different temperature intervals in the operation period is adjusted, so that the air conditioning system meets the following operation conditions: the average operating power per operating cycle over a number of operating cycles of the day (assuming an operating cycle of 60min, the number of operating cycles is 24) is less than the power limit and the total water consumption of the spray device 5 is less than the water limit. After continuously running for a plurality of times according to the test method, dividing the temperature into a plurality of intervals by methods such as induction, calculation, statistics and the like, respectively determining the running time length of the spraying device 5 corresponding to the minimum water consumption meeting the running conditions in each temperature interval, and finally setting the running time length as the starting time length of the temperature interval.
That is to say, in the control method, a simulation test is performed in advance according to the water quantity limit value and the power limit value, the starting duration of the spraying device 5 in each temperature interval is set based on the simulation test to form a comparison table, and then in the actual control process, the starting duration at the outdoor environment temperature is determined according to the actual outdoor environment temperature and the corresponding relationship between the temperature interval where the outdoor environment temperature is located and the starting duration.
Through setting for the length of opening under the different outdoor ambient temperature based on water yield limit value and power limit value, the balance of operating power and spraying water yield can also be realized to this application, under the prerequisite of guaranteeing that air conditioning system's average operating power is not higher than the power limit value, the water of practicing thrift spraying, avoids the waste of water resource. After repeated tests, observation, analysis and comparison by the inventor, after the test method is adopted, the air-conditioning system can basically realize that the air-conditioning system operates below the power limit value all day in practical application, and the total water consumption all day accords with the water limit value, so that the continuous operation of the air-conditioning system is realized. Wherein, when the test area is in the hottest stage of the whole year (for example, the hottest stage can be defined as that the average air temperature of the whole day is higher than 35 ℃), the total water consumption of the spraying device 5 is lower than 30L, and when the test area is not in the hottest stage, the total water consumption of the spraying device 5 is lower than 15L.
As an alternative, the simulation may be performed for a fixed period of time only, for example, if the average temperature of the area between 22 o 'clock and 7 o' clock of the next day is less than 30 ℃, the simulation may be performed for a run period between 7 o 'clock and 22 o' clock.
As another alternative embodiment, the fitting formula of the outdoor environment temperature and the opening duration may also be obtained by obtaining corresponding data of a plurality of temperature points and corresponding opening durations based on a simulation test, and then fitting based on the plurality of temperature points and the corresponding opening durations. And then in the actual control process, determining the starting time length based on the outdoor environment temperature detected in each period and a fitting formula.
The starting time of each temperature interval is set through testing based on the water quantity limit value of the spraying device 5 and the power limit value of the air conditioning system, the control method can realize balance of the running power and the spraying water quantity, the spraying water is saved on the premise that the average running power of the air conditioning system is not higher than the power limit value, and waste of water resources is avoided.
With continued reference to fig. 4, when the spraying device 5 operates, that is, when the spraying device 5 operates for the first opening duration, the second opening duration or the third opening duration, step S215 is executed to determine whether the operation duration of the spraying device 5 reaches the predetermined duration; if the running time reaches the preset time, executing step S221, and controlling the spraying device 5 to stop running; otherwise, when the operation time length does not reach the predetermined time length, step S217 is performed to obtain the outdoor ambient temperature, the operation frequency of the compressor 1, and the state of the water level alarm switch again. The running time length refers to the accumulated starting time length of the spraying device 5, if the spraying device 5 runs continuously, the continuous running time length is the accumulated starting time length, and if the spraying device 5 runs intermittently, the sum of all time in the starting state is the accumulated starting time length. The predetermined time duration refers to the first opening time duration, the second opening time duration and the third opening time duration.
Taking the first starting time as an example of 60min, when the continuous operation time of the spraying device 5 reaches 60min, controlling the spraying device 5 to stop operating; otherwise, the outdoor ambient temperature, the operating frequency of the compressor 1 and the state of the water level alarm switch are obtained. The judgment process of the spraying device 5 when operating in the second opening time length and the third opening time length is similar to that, and is not described again.
When the execution of step S217 is finished, step S219 is executed next, and it is determined whether or not the spray device 5 satisfies the stop condition; if the spray device 5 meets the stop condition, executing step S221, and controlling the spray device 5 to stop running; otherwise, when the spray device 5 does not satisfy the stop condition, the process returns to step S215, and whether the operation time length reaches the predetermined time length is determined again.
Specifically, the stop condition includes at least one of the following conditions: the outdoor environment temperature is smaller than a third temperature threshold value and lasts for a second preset time; the running frequency of the compressor 1 is less than a frequency threshold value and lasts for a second preset time; the water level alarm switch of the cooling water tank 51 is in an on state and lasts for a second preset time.
The third temperature threshold value can be 30 ℃, when the outdoor environment temperature is less than 30 ℃, the heat exchange effect is better when the outdoor heat exchanger 2 operates, the operating power of the air conditioning system is lower at the moment, further spraying and cooling are not needed, and the spraying device 5 can be controlled to stop operating at the moment. The frequency threshold may be 40Hz, and when the operating frequency of the compressor 1 is less than 40Hz, the operating power of the air conditioning system is usually in a lower power range, and at this time, the spraying device 5 may be controlled to stop operating. When the water level alarm switch is in an on state, the water quantity in the cooling water tank 51 is proved to be insufficient at the moment, and the spraying device 5 needs to be controlled to stop running in order to avoid the fault of the water pump 53. The second preset time can be 2min, the judgment result can be more accurate due to the setting of the second preset time, and the parameter fluctuation influence in the judgment process can be effectively eliminated. Of course, the specific values of the third temperature threshold, the frequency threshold and the second preset time period are only used as examples in this application, and those skilled in the art can make reasonable adjustments based on the actual situation.
When one of the outdoor environment temperature, the running frequency of the compressor 1 and the water level alarm switch of the cooling water tank 51 meets the quit condition, the spraying device 5 is controlled to stop running, the spraying control method can also control the spraying device 5 to quit spraying in time, and waste of the spraying water quantity and failure of the air conditioning system are avoided.
Continuing to refer to fig. 4, after the operation of the spraying device 5 is stopped, or when the step S203 determines that the spraying device 5 does not satisfy the starting condition, executing step S223 to determine whether the current operation cycle is finished; if the current operation period is finished, returning to execute the step S201 and starting a new round of control circulation; otherwise, if the current operation period is not finished, the step S223 is repeatedly executed until the current operation period is finished.
Example 2
Referring now to fig. 5, a second embodiment of the present application will be briefly described. Fig. 5 is a system diagram of an air conditioning system according to a second embodiment of the present invention.
As shown in fig. 5, the present embodiment is different from example 1 in that: the specific structure of the air conditioning system is different. Specifically, the spraying device 5 further includes an outdoor water receiving tray 22 and a water return pipe 23, a water drain hole 61 is formed in the outdoor case 6 of the air conditioning system, the outdoor water receiving tray 22 is disposed below the water drain hole 61, one end of the water return pipe 23 is communicated with the outdoor water receiving tray 22, and the other end of the water return pipe is communicated with the cooling water tank 51.
The air conditioning system also comprises an indoor water pan 42 and a condensate pipe 43, wherein the indoor water pan 42 is arranged below the indoor heat exchanger 4, one end of the condensate pipe 43 is communicated with the indoor water pan 42, and the other end is led out of the room and communicated with a cooling water tank 51.
By arranging the outdoor water receiving tray 22 and the water return pipe 23, the spraying water can be recycled, and the spraying water consumption is further saved. Through with comdenstion water conservancy diversion to cooling water tank 51 in, the air conditioning system of this application can also further utilize the comdenstion water that the air conditioner circulation process produced, it is extravagant to reduce the water source, reduces the moisturizing volume.
Example 3
A third embodiment of the present application will be briefly described with reference to fig. 6. Fig. 6 is a schematic diagram of a spraying direction of the spray pipe according to the third embodiment of the present invention.
As shown in fig. 6, the present embodiment is different from examples 1 and 2 in that: the arrangement mode of the spray holes is different. Specifically, the spray holes are arranged along the air intake direction of the outdoor unit, facing away from the outdoor heat exchanger 2.
This mode of setting up can make the shower water be the toper and disperse and spray the area of coverage and enlarge gradually, simultaneously, through the negative pressure of the rotatory production of outer fan 21, the shower water is inhaled in quick-witted case 6 again to make the shower water can cover the great surface area of outdoor heat exchanger 2, increased the area of coverage that sprays to outdoor heat exchanger 2, and can also make the second end of shower 52 set up near outdoor heat exchanger 2, save the space of off-premises station.
Example 4
Referring now to fig. 7, one possible control flow of the present application will be described. Fig. 7 is a logic diagram of a spraying control method of an air conditioning system according to a possible embodiment of the present invention.
As shown in fig. 7, in a possible control procedure, the operation period is set to 60min, and when an operation period starts, step S501 is first executed to obtain the outdoor environment temperature ToutThe running frequency f of the compressor 1 and the water level alarm switch state N.
Then, step S502 is executed to determine the outdoor environment temperature ToutWhether the temperature is more than or equal to 30 ℃, the frequency f of the compressor 1 is more than or equal to 40Hz, and the state of the water level alarm switch is at a low level (the high level is an open alarm state, and the low level is a closed alarm state), namely whether N is 0; when the three are simultaneously established and each lasts for more than 2min, the starting condition of the spraying device 5 is proved to be met, and at the moment, the step S503 is executed to further judge the outdoor environment temperature ToutWhether the temperature is more than or equal to 40 ℃ or not is established; otherwise, when the three are not simultaneously established, the starting condition of the spraying device 5 is proved not to be met, the program is directly quitted, and the next operation period is waited to start.
When the judgment result of the step S503 is ToutWhen the temperature is more than or equal to 40 ℃, executing the step S504, and determining the starting time of the spraying device 5 as t160 min; otherwise, when ToutIf the temperature is not higher than 40 ℃, executing the step S505 to further judge the outdoor environment temperature ToutIf < 35 ℃ is established.
When the judgment result of the step S505 is ToutIf the temperature is not lower than 35 ℃, executing step S506, and determining the starting time of the spraying device 5 as t240 min; otherwise, when ToutIf < 35 ℃, executing step S507 to determine the starting time of the spraying device 5 as t3＝20min。
When step S504 is executed, the shower device 5 is operated at t1Continuously operating for 60min, and in the operating process, executing step S508 to judge the operating time t1Whether or not 60min is true; when t is1If yes, step S513 is executed to control the water pump 53 to stop operating; otherwise when t1If' 60min is not established, step S511 is executed to acquire outdoor ambient temperature T againout1', operating frequency f of compressor 11' water level alarm switch state N1’。
When step S511 is executed, step S512 is executed immediately, and the outdoor environment temperature T is judgedout1' < 30 ℃ for 2min or compressor 1 frequency f1' < 40Hz and lasting 2min is true or not, or whether the state of the water level alarm switch is at high level and lasting 2min, namely N1Whether or not' 1 and lasting for 2min holds; when at least one of the three is satisfied, the spraying device 5 is proved to satisfy the exit condition, and at this time, step S513 is executed to control the water pump 53 to stop running; otherwise, when the three are not satisfied, the process returns to step S508, and the operation time t of the spraying device 5 is determined again1' -60 min is true or not.
Similarly, when step S506 is performed, the shower device 5 is operated at t2When the operation is carried out intermittently for 40min, step S509 is executed to judge the operation time period t2Whether' -40 min holds; when t'2If 40min is true, step S513 is executed to control the water pump 53 to stop operating; otherwise when t2If' 40min is not established, step S514 is executed to acquire outdoor ambient temperature T againout2', operating frequency f of compressor 12' water level alarm switch state N2’。
When step S514 is executed, step S515 is executed immediately, and the outdoor ambient temperature T is judgedout2' < 30 ℃ for 2min or compressor 1 frequency f2' < 40Hz and lasting 2min is true or not, or whether the state of the water level alarm switch is at high level and lasting 2min, namely N2Whether or not' 1 and lasting for 2min holds; when at least one of the three is satisfied, the spraying device 5 is proved to satisfy the exit condition, and at this time, step S513 is executed to control the water pump 53 to stop running; otherwise, when the three are not satisfied, the process returns to step S509, and the operation time t of the spraying device 5 is determined again2If 40min is true.
Similarly, when step S507 is executed, the shower device 5 is operated at t3In the operation process, step S510 is executed to judge the operation time t when the operation is intermittently performed for 20min3Whether or not' 20min is true; when t'3If 20min is true, step S513 is executed to control the water pump 53 to stop operating; otherwise when t3If' 20min is not established, step S516 is executed to acquire the outdoor ambient temperature T againout3', operating frequency f of compressor 13' water level alarm switch state N3’。
When step S516 is executed, step S517 is executed to determine the outdoor ambient temperature Tout3' < 30 ℃ for 2min or compressor 1 frequency f3' < 40Hz and lasting 2min is true or not, or whether the state of the water level alarm switch is at high level and lasting 2min, namely N3Whether or not' 1 and lasting for 2min holds; when at least one of the three is satisfied, the spraying device 5 is proved to satisfy the exit condition, and at this time, step S513 is executed to control the water pump 53 to stop running; otherwise, when the three are not satisfied, the process returns to step S510, and the operation time t of the spraying device 5 is determined again3Whether or not' 20min is true.
Although the foregoing embodiments describe the steps in the above sequential order, those skilled in the art will understand that, in order to achieve the effect of the present embodiments, the steps may not be executed in such an order, and may be executed simultaneously (in parallel) or in an inverse order, and these simple variations are within the scope of the present invention. For example, the step of determining whether spray device 5 satisfies the stop condition may be performed at any point in time after spray device 5 begins to operate, and need not be performed in the exact order of steps described herein.
It should be noted that, in the above embodiments, the structure of the air conditioning system is only used for illustrating the principle of the present application, and is not intended to limit the protection scope of the present application. Without departing from the principle of the present application, a person skilled in the art can adjust the structure of the air conditioning system, so that the present application can be applied to more specific application scenarios.
For example, in another alternative embodiment, one or more of the components described below may be optionally omitted by one skilled in the art for a particular application to enable the present application to be tailored to different application scenarios. These components include, but are not limited to: an outdoor water receiving tray 22, a water return pipe 23, an indoor water receiving tray 42 and a condensate pipe 43.
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.
Those skilled in the art will appreciate that the general controller may also include other known structures such as processors, controllers, memories, etc., wherein the memories include, but are not limited to, ram, flash, rom, prom, volatile, non-volatile, serial, parallel, or registers, etc., and the processors include, but are not limited to, CPLD/FPGA, DSP, ARM processor, MIPS processor, etc. Such well-known structures are not shown in the drawings in order to not unnecessarily obscure embodiments of the present disclosure.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
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.
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 easily understood by those skilled in the art that the scope of the present invention is obviously 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 spraying control method of an air conditioning system is characterized in that the air conditioning system comprises a compressor, an outdoor heat exchanger, a throttling element, an indoor heat exchanger and a spraying device, the spraying device is used for spraying and cooling the outdoor heat exchanger,
the spraying control method comprises the following steps:
when the current operation period starts, judging whether the spraying device meets the starting condition;
when the spraying device meets the starting condition, determining the starting time of the spraying device in the operation period based on the outdoor environment temperature;
and controlling the spraying device to operate based on the opening duration.
2. The spray control method of an air conditioning system of claim 1, wherein the on-time is set based on a water volume limit of the spray device and a power limit of the air conditioning system.
3. The spray control method of an air conditioning system according to claim 2, wherein the on-time period is set such that:
and if the spraying device is controlled to continuously operate for a plurality of operation periods, the total water consumption of the spraying device is less than the water limit value, and the average operation power of the air conditioning system in the plurality of operation periods is less than the power limit value.
4. The spray control method of an air conditioning system of claim 1, wherein the step of determining the on-time of the spray device in the operation cycle based on the outdoor ambient temperature further comprises:
when the outdoor environment temperature is greater than or equal to a first temperature threshold value, determining the starting time length as a first starting time length;
when the outdoor environment temperature is smaller than the first temperature threshold and is larger than or equal to a second temperature threshold, determining the starting time length as a second starting time length;
when the outdoor environment temperature is smaller than the second temperature threshold, determining the starting duration to be a third starting duration;
wherein the first temperature threshold is greater than the second temperature threshold; the first opening duration, the second opening duration and the third opening duration are sequentially reduced.
5. The spray control method of an air conditioning system according to claim 1, wherein the step of controlling the operation of the spray device based on the on-time period further comprises:
when the specific gravity of the starting time length in the operation period is greater than a specific gravity threshold value, controlling the spraying device to continuously operate;
otherwise, controlling the spraying device to operate intermittently.
6. The spraying control method of the air conditioning system according to claim 1, wherein the spraying device comprises a cooling water tank and a spraying pipe, the cooling water tank stores cooling liquid, a first end of the spraying pipe is communicated with the cooling water tank, a second end of the spraying pipe is provided with a spraying hole and extends to the outdoor heat exchanger, and a water pump is arranged on the spraying pipe.
7. The spraying control method of the air conditioning system according to claim 6, wherein the spraying device further comprises an outdoor water pan and a water return pipe, a drain hole is formed in an outdoor case of the air conditioning system, the outdoor water pan is disposed below the drain hole, and one end of the water return pipe is communicated with the outdoor water pan and the other end of the water return pipe is communicated with the cooling water tank.
8. The spray control method of an air conditioning system according to claim 6, wherein the turn-on condition includes:
the outdoor environment temperature is greater than or equal to a third temperature threshold value and lasts for a first preset time;
the running frequency of the compressor is greater than a frequency threshold value and lasts for the first preset time;
and a water level alarm switch of the cooling water tank is in a closed state and lasts for the first preset time.
9. The spray control method of an air conditioning system of claim 8, further comprising:
when the spraying device runs, judging whether the spraying device meets a stopping condition;
and when the spray device meets the stop condition, controlling the spray device to stop running.
10. The spray control method of an air conditioning system according to claim 9, wherein the stop condition includes at least one of the following conditions:
the outdoor environment temperature is smaller than the third temperature threshold value and lasts for a second preset time;
the running frequency of the compressor is smaller than the frequency threshold value and lasts for a second preset time;
and the water level alarm switch of the cooling water tank is in an on state and lasts for a second preset time.
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| CN114963364A (en) * | 2022-05-31 | 2022-08-30 | 宁波奥克斯电气股份有限公司 | Module unit spraying system, control method and device and module unit |
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