CN113251501A - Air conditioner outdoor unit control method and air conditioner outdoor unit - Google Patents
Air conditioner outdoor unit control method and air conditioner outdoor unit Download PDFInfo
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- CN113251501A CN113251501A CN202110524379.6A CN202110524379A CN113251501A CN 113251501 A CN113251501 A CN 113251501A CN 202110524379 A CN202110524379 A CN 202110524379A CN 113251501 A CN113251501 A CN 113251501A
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- 238000000034 method Methods 0.000 title claims abstract description 53
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 283
- 238000001816 cooling Methods 0.000 claims abstract description 69
- 239000003507 refrigerant Substances 0.000 claims abstract description 68
- 230000001276 controlling effect Effects 0.000 claims description 43
- 238000013507 mapping Methods 0.000 claims description 9
- 230000002596 correlated effect Effects 0.000 claims description 4
- 230000005494 condensation Effects 0.000 abstract description 13
- 238000009833 condensation Methods 0.000 abstract description 13
- 230000017525 heat dissipation Effects 0.000 abstract description 11
- 230000000694 effects Effects 0.000 description 6
- 238000005057 refrigeration Methods 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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Classifications
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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
- F24F1/14—Heat exchangers specially adapted for separate outdoor units
- F24F1/16—Arrangement or mounting thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- 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
- F24F1/20—Electric components for separate outdoor units
- F24F1/24—Cooling of electric components
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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
- F24F11/84—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 valves
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
- F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
Abstract
The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner outdoor unit control method and an air conditioner outdoor unit. The invention aims to solve the problem that electrical components on an electric control board are damaged due to the influence of condensation because condensation is easily generated on the electric control board due to the low temperature of a refrigerant in the prior art. For this purpose, the present invention controls the electronic expansion valve according to the actual temperature of the electric control panel of the outdoor unit of the air conditioner after the outdoor unit of the air conditioner is turned on, and controls the water valve according to the actual water level in the process of controlling the electronic expansion valve, so that the actual temperature is within the preset temperature range. Therefore, after the outdoor unit of the air conditioner is opened, the electronic expansion valve is controlled through the actual temperature of the electric control board in the outdoor unit of the air conditioner, the temperature of the electric control board is controlled within a preset temperature range through the refrigerant heat exchange pipe, and the electric control board is prevented from being damaged due to the influence of condensation; meanwhile, the water valve is controlled according to the actual water level in the cooling process, so that the electric control plate is subjected to auxiliary heat dissipation through the water cooling pipe.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner outdoor unit control method and an air conditioner outdoor unit.
Background
The air conditioner comprises an indoor unit and an outdoor unit, wherein an electric control plate, a compressor, an outdoor heat exchanger, an outdoor fan and the like are arranged in the outdoor unit, the electric control plate can generate heat when controlling the compressor, the fan and the like, the outdoor environment temperature is high in summer, and the upper heat of the electric control plate is easily gathered to influence the working performance of the electric control plate and even damage the working performance of the electric control plate.
At present, the electronic control board is generally cooled by arranging a radiator on the electronic control board, the radiator comprises a radiating substrate and a heat exchange tube integrally embedded with the radiating substrate, the heat exchange tube comprises a main heat exchange section positioned in the radiating substrate, and the main heat exchange section is connected in parallel with an indoor heat exchanger of an indoor unit through a refrigerant inlet end and a refrigerant outlet of the main heat exchange section, so that forced heat dissipation of the electronic control board is realized by using a circularly flowing refrigerant.
However, in the conventional cooling method, since the temperature of the refrigerant is low, if the flow rate of the refrigerant is not properly controlled, condensation is easily generated on the heat sink and the electric control board, and thus, the electric components on the electric control board are damaged due to the influence of the condensation.
Therefore, there is a need in the art for a new control method for an outdoor unit of an air conditioner and an outdoor unit of an air conditioner to solve the above problems.
Disclosure of Invention
The invention provides an air conditioner outdoor unit control method and an air conditioner outdoor unit, aiming at solving the problems that in the prior art, because the temperature of a refrigerant is low, condensation is easily generated on a radiator and an electric control board, and electrical elements on the electric control board are damaged due to the influence of the condensation.
Firstly, in the control method of the outdoor unit of the air conditioner, the outdoor unit of the air conditioner comprises an electric control board, an outdoor heat exchanger and a water storage box, wherein the electric control board is provided with a water cooling pipe and a refrigerant heat exchange pipe, the refrigerant heat exchange pipe is connected with the outdoor heat exchanger through an electronic expansion valve, the water cooling pipe is connected with the water storage box through a water valve, and the water storage box is used for being connected with a condensate pipe of an indoor unit; the control method comprises the following steps: acquiring the actual temperature of the electric control plate and the actual water level of condensed water in the water storage box; after the outdoor unit of the air conditioner is started, controlling the electronic expansion valve according to the actual temperature, and controlling the water valve according to the actual water level in the process of controlling the electronic expansion valve so as to enable the actual temperature to be within a preset temperature range; wherein the minimum value of the preset temperature range is greater than the dew point temperature of the outdoor environment.
As a preferable technical solution of the method for controlling an outdoor unit of an air conditioner according to the present invention, the step of controlling the electronic expansion valve according to the actual temperature after the outdoor unit of the air conditioner is turned on, and controlling the water valve according to the actual water level in the process of controlling the electronic expansion valve further includes: comparing the actual water level with a first preset water level and a second water level in the process of controlling the electronic expansion valve; when the actual water level is greater than or equal to the first preset water level, opening the water valve; and when the actual water level is less than or equal to the second preset water level, closing the water valve.
As a preferable technical solution of the method for controlling an outdoor unit of an air conditioner according to the present invention, the method further includes, after the step of "opening the water valve when the actual water level is greater than or equal to the first preset water level": closing the electronic expansion valve, and controlling the opening degree of the water valve according to the actual temperature; or closing the electronic expansion valve, adjusting the opening degree of the water valve to be maximum, and controlling the flow of a water pump connected between the water cooling pipe and the water storage box according to the actual temperature; or, the electronic expansion valve is controlled according to the actual temperature, and the opening degree of the water valve is adjusted to be maximum.
As a preferable aspect of the method for controlling an outdoor unit of an air conditioner according to the present invention, the step of controlling the electronic expansion valve according to the actual temperature includes: comparing the actual temperature with a preset temperature value; wherein the preset temperature value is within the preset temperature range; when the actual temperature is lower than the preset temperature value, reducing the opening degree of the electronic expansion valve; when the actual temperature is higher than the preset temperature value, increasing the opening degree of the electronic expansion valve; and when the actual temperature is equal to the preset temperature value, keeping the opening degree of the electronic expansion valve.
As a preferable aspect of the method for controlling an outdoor unit of an air conditioner according to the present invention, the step of controlling the electronic expansion valve according to the actual temperature further includes: calculating the temperature difference between the actual temperature and the preset temperature value; determining the adjusting speed of the electronic expansion valve according to the mapping relation between the temperature difference and the adjusting speed of the electronic expansion valve; wherein the adjustment speed is positively correlated with the temperature difference in the mapping relationship.
As a preferable technical solution of the control method of the outdoor unit of an air conditioner according to the present invention, in the step of obtaining the actual temperature of the electric control board and the actual water level of the condensed water in the water storage box: acquiring the actual temperature in real time after the outdoor unit of the air conditioner is started; and acquiring the actual water level at set intervals after the outdoor unit of the air conditioner is started.
Then, in the outdoor unit for an air conditioner according to the present invention, the outdoor unit for an air conditioner includes: the water-cooled heat exchanger comprises an electric control board, an outdoor heat exchanger and a water storage box, wherein a water-cooled tube and a refrigerant heat exchange tube are arranged on the electric control board, the refrigerant heat exchange tube is connected with the outdoor heat exchanger through an electronic expansion valve, the water-cooled tube is connected with the water storage box through a water valve, and the water storage box is used for being connected with a condensate pipe of an indoor unit; the electric control board includes: the control program of the outdoor unit of the air conditioner is executed by the processor to realize the control method of the outdoor unit of the air conditioner in any technical scheme.
As a preferred technical solution of the outdoor unit provided by the present invention, a first pipeline and a second pipeline are respectively connected to a refrigerant outlet of the outdoor heat exchanger, the first pipeline is used for connecting with a refrigerant inlet of the refrigerant heat exchange tube, the second pipeline is used for connecting with a refrigerant inlet of an indoor unit of an air conditioner, and the electronic expansion valve is arranged on the first pipeline.
As a preferable technical solution of the outdoor unit provided by the present invention, the outdoor unit further comprises a water pump, an inlet of the water pump is communicated with an outlet of the water storage box, an outlet of the water pump is communicated with an inlet end of the water cooling pipe, and the water pump is in signal connection with the processor.
As a preferable technical solution of the outdoor unit provided by the present invention, the water storage box is provided with an overflow port, and the overflow port is arranged above the outdoor heat exchanger; and/or the outlet of the water cooling pipe is arranged above the outdoor heat exchanger.
In the method for controlling the outdoor unit of the air conditioner and the outdoor unit of the air conditioner, after the outdoor unit of the air conditioner is opened, the electronic expansion valve is controlled according to the actual temperature of the electric control board in the outdoor unit of the air conditioner, so that the temperature of the electric control board can be controlled within a preset temperature range through the cooling effect of the refrigerant heat exchange pipe, and the problem that electrical elements on the electric control board are damaged due to condensation is solved. Meanwhile, the water valve is controlled according to the actual water level in the process of controlling the electronic expansion valve, so that the condensate water generated by the indoor unit of the air conditioner is utilized to perform auxiliary heat dissipation on the electric control board through the water cooling pipe, and the influence on the indoor environment refrigeration effect when the refrigerant heat exchange pipe is used for cooling the electric control board can be reduced.
In addition, the method for controlling an outdoor unit of an air conditioner and the outdoor unit of an air conditioner according to the present invention further include: comparing the actual water level of the condensed water in the water storage box with a first preset water level and a second water level in the process of controlling the electronic expansion valve; when the actual water level is greater than or equal to a first preset water level, opening a water valve; and when the actual water level is less than or equal to the second preset water level, closing the water valve. So, through the judgement according to the actual water level of the comdenstion water in the water storage box come control water valve open and close, can in time open the water valve and carry out cooling through the water-cooled tube to automatically controlled board when the water yield of the comdenstion water that the water storage box stored is enough.
Drawings
Hereinafter, a method for controlling an outdoor unit of an air conditioner and an outdoor unit of an air conditioner according to the present invention will be described with reference to the accompanying drawings. In the drawings:
fig. 1 is a schematic structural view of an outdoor unit of an air conditioner according to the present embodiment;
fig. 2 is a schematic flow chart illustrating a control method of an outdoor unit of an air conditioner according to the present embodiment;
fig. 3 is a detailed flowchart illustrating a method for controlling an outdoor unit of an air conditioner according to the present embodiment.
List of reference numerals
1-an electric control board; 11-a water-cooled tube; 12-refrigerant heat exchange tubes; 13-an electronic expansion valve; 14-a water valve; 15-a heat sink; 2-a water storage box; 3-a water pump; 4-outdoor heat exchanger; 5-a drain pipe.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example one
In order to solve the above problems in the prior art, that is, to solve the problem that the electrical components on the electric control board are damaged due to the condensation caused by the fact that the heat sink and the electric control board are easily condensed due to the low temperature of the refrigerant in the conventional cooling method, the present embodiment provides an outdoor unit of an air conditioner.
Fig. 1 shows a schematic structural diagram of an outdoor unit of an air conditioner, as shown in the figure, the direction of an arrow shown on a water cooling pipe 11 in fig. 1 is a flow direction of condensed water, and the direction of an arrow shown on a refrigerant heat exchange pipe 12 is a flow direction of refrigerant, the outdoor unit of the air conditioner provided in this embodiment includes an electric control board 1, a water storage box 2 and an outdoor heat exchanger 4, the electric control board 1 is provided with a water cooling pipe 11, a refrigerant heat exchange pipe 12, a storage (not shown in the figure), a processor (not shown in the figure) and a control program of the outdoor unit of the air conditioner stored in the storage and capable of operating on the processor, the refrigerant heat exchange pipe 12 is connected with the outdoor heat exchanger 4 through an electronic expansion valve 13, the water cooling pipe 11 is connected with the water storage box 2 through a water valve 14, the electronic expansion valve 13 and the water valve 14 are both in signal connection with the processor, and the water storage box 2 is used for being connected with a condensed water pipe of an indoor unit.
Specifically, a first pipeline (not shown in the figure) and a second pipeline (not shown in the figure) are connected to a refrigerant outlet of the outdoor heat exchanger 4, the first pipeline is used for being connected with a refrigerant inlet of the refrigerant heat exchange tube 12, the second pipeline is used for being connected with a refrigerant inlet of an indoor unit of an air conditioner, the electronic expansion valve 13 is arranged on the first pipeline, and the electronic expansion valve 13 is in signal connection with the processor. Therefore, by shunting part of the refrigerant on the outdoor heat exchanger 4 and simultaneously adjusting the refrigerant according to the proper amount of the electronic expansion valve 13, part of the refrigerant is enough to cool the electric control plate 1 to a reasonable temperature range at that time, so that the electric control plate 1 cannot be excessively cooled due to too large refrigerant flow, and meanwhile, the refrigerant flow and the refrigerant temperature of the outlet of the refrigerant heat exchange tube 12 are adjusted according to the electronic expansion valve 13, so that the electric control plate 1 is cooled to the reasonable temperature range more accurately.
In order to conveniently measure the temperature on the electric control board 1, a temperature sensor can be arranged on the electric control board 1 and is in signal connection with the processor; in order to conveniently measure the water level of the condensed water in the water storage box 2, a water level sensor may be disposed in the water storage box 2, and the water level sensor is in signal connection with a processor of the outdoor unit.
In the outdoor unit provided by this embodiment, the refrigerant heat exchange tube 12 disposed on the electric control board 1 can cool and dissipate the electric control board 1 through the refrigerant on the outdoor heat exchanger 4, and meanwhile, the water storage box 2 can be used to collect the condensed water, and then according to the water level of the condensed water in the water storage box 2, the condensed water is injected into the water cooling tube 11 on the electric control board 1 through the water pump 3, so as to cool and dissipate the condensed water for the electric control board 1. So, can dispel the heat to automatically controlled board 1 through the comdenstion water when cooling through the refrigerant to guarantee the cooling effect to the temperature of automatically controlled board 1 on the basis of avoiding automatically controlled board 1 to produce the condensation and damage when cooling.
It should be noted that the outdoor unit of the air conditioner mentioned in this embodiment further includes other necessary and well-known components in the art, such as a compressor, a refrigeration pipe, a resistor, a capacitor, a diode, etc., which are not described herein again.
As a preferred embodiment of the outdoor unit of an air conditioner provided in this embodiment, a water pump 3 is further disposed on the outdoor unit of an air conditioner, an inlet of the water pump 3 is communicated with an outlet of the water storage box 2, an outlet of the water pump 3 is communicated with an inlet of the water cooling pipe 11, and the water pump 3 is in signal connection with the processor. So, when needs are to automatically controlled board 1 rapid cooling, can increase the velocity of flow of comdenstion water through automatically controlled board 1 control water valve 14 and water pump 3.
As a preferred embodiment of the outdoor unit of an air conditioner provided in this embodiment, the water storage box 2 is provided with an overflow port, and the overflow port is disposed above the outdoor heat exchanger 4. So, can avoid the water that overflows to destroy automatically controlled board 1 on overflow mouth runner outdoor heat exchanger 4 when the water in water storage box 2 is full, will spill the comdenstion water that overflows simultaneously on outdoor heat exchanger 4 for outdoor heat exchanger 4 and external heat transfer.
Further, the outlet of the water cooling tube 11 may also be disposed above the outdoor heat exchanger 4. Therefore, the condensed water passing through the electric control board 1 can be sprinkled on the outdoor heat exchanger 4, so that the heat exchange between the outdoor heat exchanger 4 and the outside is accelerated.
Certainly, in order to fix the water-cooling tube 11 and the refrigerant heat exchange tube 12 on the electronic control board 1, the electronic control board 1 may be provided with a heat dissipation plate 15, and then the water-cooling tube 11 and the refrigerant heat exchange tube 12 are fixed on the heat dissipation plate 15, and are fixedly connected with the electronic control board 1 through the heat dissipation plate 15, so as to attach the water-cooling tube 11 to the electronic control board 1, thereby performing cooling processing on the electronic control board 1. Of course, the water cooling pipe 11 and the refrigerant heat exchange pipe 12 can also be directly attached to the electronic control board 1.
It is understood that the heat dissipation plate 15 can be deformed according to the specific distribution of electrons on the electronic control board 1, that is, the heat dissipation plate 15 can be any shape as long as it can dissipate heat corresponding to the electronic control board 1. In addition, the arrangement of the water cooling pipe 11 and the refrigerant heat exchange pipe 12 also needs to be matched with the shape of the heat dissipation plate 15. Of course, the water cooling tubes 11 and the refrigerant heat exchange tubes 12 may be arranged in a serpentine shape or in a U-shape, and the number of the water cooling tubes and the refrigerant heat exchange tubes may be one or more, which may be specifically selected according to specific application scenarios.
It should be noted that, in the refrigeration process, most of the refrigerant flowing out of the outdoor heat exchanger 4 in the outdoor unit is throttled and cooled by the electronic expansion valve 13 on the second pipeline and then is delivered to the indoor unit, and a small part of the refrigerant in the outdoor heat exchanger 4 is throttled and cooled by the electronic expansion valve 13 on the refrigerant heat exchange tube 12 and then is delivered to the electronic control board 1 to be cooled.
When the air conditioner is started, a refrigerant firstly cools the electric control board 1, and when the water level in the water storage box 2 is more than or equal to a first preset water level, a water valve 14 is opened to cool the electric control board 1 by condensed water through the water cooling pipe 11, at the moment, the refrigerant cooling mode and the water cooling mode coexist, and the opening degrees of the electronic expansion valve 13 and the water valve 14 are adjusted according to the actual temperature of the electric control board 1, so that the temperature of the electric control board 1 is in a preset temperature range; of course, under the condition that the two cooling modes coexist, if the water level of the condensed water in the water storage box 2 continuously rises, under the condition that the temperature of the electric control board 1 is within the preset temperature range, the opening degree of the water valve 14 is gradually increased, the opening degree of the electronic expansion valve 13 is gradually decreased, and the cooling mode dominated by the refrigerant is gradually changed into a condensed water cooling mode, wherein the opening degree of the electronic expansion valve 13 can be adjusted to be closed and the opening degree of the water valve 14 is adjusted to be maximum, that is, the condensed water can be used alone to cool the electric control board 1 at this time.
As a preferred embodiment of the outdoor unit according to the present embodiment, the water storage box 2 is provided with an overflow port, and the overflow port is provided above the outdoor heat exchanger 4. So, when the comdenstion water in the water storage box 2 was stored more and reached the overflow mouth height, unnecessary comdenstion water can flow to outdoor heat exchanger 4 on through the overflow mouth to can accelerate outdoor heat exchanger 4's radiating efficiency.
Further, the outlet of the water cooling tube 11 is disposed above the outdoor heat exchanger 4. Therefore, the condensed water after heat exchange with the electric control board 1 is discharged to the outdoor heat exchanger 4, and the heat dissipation of the outdoor heat exchanger 4 is accelerated. Of course, the outlet of the water-cooling pipe 11 is arranged right above the outdoor heat exchanger 4 and the outlet of the water-cooling pipe 11 is provided with a plurality of water outlet holes which are arranged at equal intervals, so that the condensed water can be sprayed on the outdoor heat exchanger 4, and the outdoor heat exchanger 4 can dissipate heat integrally.
In addition, the outlet of the water cooling pipe 11 is communicated with a water discharge pipe 5, the water discharge pipe 5 is horizontally arranged on the outdoor heat exchanger 4, and a plurality of water outlet holes with equal intervals are formed in the water discharge pipe 5. Therefore, the condensed water after heat exchange by the electric control board 1 can be uniformly sprinkled on the outdoor heat exchanger 4.
Of course, the overflow port can also be communicated with the drain pipe 5 of the outlet of the water cooling pipe 11 through a water pipe, so that the water overflowing from the water storage box 2 and the water exchanging with the water cooling pipe 11 through the electric control plate 1 can be sprayed on the outdoor heat exchanger 4, and the heat exchange efficiency of the outdoor heat exchanger 4 is improved.
Example two
In order to solve the above problems in the prior art, that is, to solve the problem that in the conventional cooling method, because the temperature of the refrigerant is low, condensation is easily generated on the heat sink and the electric control board, and thus electrical components on the electric control board are damaged due to the influence of the condensation, the embodiment provides a control method for an outdoor unit of an air conditioner.
As shown in fig. 1, the outdoor unit of an air conditioner provided in this embodiment includes an electric control board 1, an outdoor heat exchanger 4, and a water storage box 2, where the electric control board 1 is provided with a water cooling pipe 11 and a refrigerant heat exchange pipe 12, the refrigerant heat exchange pipe 12 is connected to the outdoor heat exchanger 4 through an electronic expansion valve 13, the water cooling pipe 11 is connected to the water storage box 2 through a water valve 14, and the water storage box 2 is used for being connected to a condensate pipe of an indoor unit; as shown in fig. 2, the control method includes:
s1, acquiring the actual temperature of the electric control board 1 and the actual water level of the condensed water in the water storage box 2;
s2, after the outdoor unit of the air conditioner is turned on, controlling the electronic expansion valve 13 according to the actual temperature, and controlling the water valve 14 according to the actual water level in the process of controlling the electronic expansion valve 13, so that the actual temperature is within the preset temperature range; wherein the minimum value of the preset temperature range is greater than the dew point temperature of the outdoor environment.
Therefore, after the outdoor unit of the air conditioner is opened, the electronic expansion valve 13 is controlled according to the actual temperature of the electric control board 1 in the outdoor unit of the air conditioner, so that the temperature of the electric control board 1 can be controlled within a preset temperature range through the cooling effect of the refrigerant heat exchange pipe 12, and the problem that electrical components on the electric control board 1 are damaged due to the influence of condensation is solved. Meanwhile, the water valve 14 is controlled according to the actual water level in the process of controlling the electronic expansion valve 13, so that the condensed water generated by the indoor unit of the air conditioner is utilized to perform auxiliary heat dissipation on the electronic control board 1 through the water cooling pipe 11, and the influence on the indoor environment refrigeration effect when the refrigerant heat exchange pipe 12 is used for cooling the electronic control board 1 can be reduced.
As a specific implementation manner of the control method of the present embodiment, as shown in fig. 3, step S2 specifically includes: s21, comparing the actual water level with the first preset water level and the second water level in the process of controlling the electronic expansion valve 13; s22, when the actual water level is larger than or equal to the first preset water level, the water valve 14 is opened; and S23, closing the water valve 14 when the actual water level is less than or equal to the second preset water level. So, through the judgement according to the actual water level of the comdenstion water in the water storage box 2 come control water valve 14 open and close, can be in time open water valve 14 and carry out cooling through water-cooling tube 11 to automatically controlled board 1 when the water yield of the comdenstion water that the water storage box 2 stored is enough.
As a preferred implementation of the above control method of the present embodiment, as shown in fig. 3, after step S22, the method further includes: s31, the electronic expansion valve 13 is closed, and the opening degree of the water valve 14 is controlled according to the actual temperature. Specifically, when the actual water level of the condensed water in the water storage box 2 is greater than or equal to a first preset water level, the water valve 14 is opened, at the moment, a refrigerant cooling mode and a water cooling mode coexist, and the opening degrees of the electronic expansion valve 13 and the water valve 14 are adjusted in real time according to the actual temperature of the electric control board 1, so that the temperature of the electric control board 1 is within a preset temperature range; under the coexistence of the two cooling modes, if the water level of the condensed water in the water storage box 2 continuously rises, under the condition that the actual temperature of the electric control board 1 is within the preset temperature range, the opening degree of the water valve 14 is gradually increased, and meanwhile, the opening degree of the electronic expansion valve 13 is gradually decreased until the opening degree of the electronic expansion valve 13 is closed, namely, the condensed water can be independently used for cooling the electric control board 1, and then, if the actual temperature of the electric control board 1 changes, the actual temperature of the electric control board 1 can be within the preset temperature range only by correspondingly adjusting the opening degree of the water valve 14.
As a preferred implementation of the above control method of the present embodiment, as shown in fig. 3, after step S22, the method further includes: and S32, closing the electronic expansion valve 13, adjusting the opening degree of the water valve 14 to the maximum, and controlling the flow rate of the water pump 3 connected between the water cooling pipe 11 and the water storage box 2 according to the actual temperature. Specifically, after the opening degree of the electronic expansion valve 13 is closed, the electronic control board 1 is cooled by using condensed water alone, and if the actual temperature of the electronic control board 1 is lowered and the actual water level of the condensed water is still greater than or equal to a first preset water level, the opening degree of the water regulating valve 14 is decreased; if the actual temperature of the electric control board 1 rises and the actual water level of the condensed water is still greater than or equal to the first preset water level, the opening degree of the water valve 14 is increased, if the opening degree of the water valve 14 is adjusted to the maximum, at the moment, if the actual temperature of the electric control board 1 is still greater than the upper limit value of the preset temperature range, the flow rate of the condensed water can be increased by starting the water pump 3 connected between the water cooling pipe 11 and the water storage box 2 and increasing the power of the water pump 3, and therefore the electric control board 1 is cooled to the preset temperature range.
As a preferred implementation of the above control method of the present embodiment, as shown in fig. 3, after step S22, the method further includes: and S33, controlling the electronic expansion valve 13 according to the actual temperature, and adjusting the opening degree of the water valve 14 to be maximum. Specifically, when the maximum-efficiency cooling means in the cooling method using condensed water alone is not enough to reduce the actual temperature of the electronic control panel 1 to the preset temperature range, that is, when the opening degree of the water valve 14 is adjusted to the maximum, and when the actual temperature of the electronic control panel 1 is still greater than the upper limit of the preset temperature, the electronic expansion valve 13 is reopened, and the electronic control panel 1 is cooled by cooling medium and water cooling. Thus, the actual temperature of the electric control board 1 is reduced to the range of the preset temperature.
As a preferred embodiment of the above control method of the present embodiment, the step of "controlling the electronic expansion valve 13 according to the actual temperature" in steps S2 and S33 includes: comparing the actual temperature with a preset temperature value; wherein the preset temperature value is within a preset temperature range; when the actual temperature is lower than the preset temperature value, the opening degree of the electronic expansion valve 13 is reduced; when the actual temperature is higher than the preset temperature value, the opening degree of the electronic expansion valve 13 is increased; when the actual temperature is equal to the preset temperature value, the opening degree of the electronic expansion valve 13 is maintained. Specifically, in step S2, at the early stage of the start-up of the air conditioner, the condensed water generated in the indoor unit of the air conditioner is too little, and at this time, the electric control board 1 can only be cooled by using the refrigerant cooling method, so that when the actual temperature is not within the preset temperature range, the actual temperature of the electric control board 1 can be maintained within the preset temperature range by correspondingly adjusting the opening degree of the electronic expansion valve 13; in step S33, the maximum cooling effect of the water cooling cannot be increased, and at this time, the electronic expansion valve 13 is opened, and the refrigerant cooling is added to cool the electronic control board 1, and at this time, the actual temperature of the electronic control board 1 can be within the preset temperature range by adjusting the opening degree of the electronic expansion valve 13.
As a preferable embodiment of the above control method of the present embodiment, the step of "controlling the electronic expansion valve 13 according to the actual temperature" in steps S2 and S33 further includes: calculating the temperature difference between the actual temperature and a preset temperature value; determining the adjusting speed of the electronic expansion valve 13 according to the mapping relation between the temperature difference and the adjusting speed of the electronic expansion valve 13; wherein the adjustment speed is positively correlated with the temperature difference in the mapping relationship. Thus, according to the mapping relation between the temperature difference and the adjusting speed of the electronic expansion valve 13, when the difference between the actual temperature and the preset temperature value is large, the opening degree of the electronic expansion valve 13 can be quickly increased, so that the flow of the refrigerant can be controlled according to the opening degree of the electronic expansion valve 13, and the actual temperature of the electric control board 1 can be quickly adjusted to be within the preset temperature range; when the actual temperature is smaller than the preset temperature value, the opening degree of the electronic expansion valve 13 can be rapidly adjusted to be small, so that the flow of the refrigerant can be controlled according to the opening degree of the electronic expansion valve 13, and the actual temperature of the electric control board 1 can be rapidly adjusted to be within the preset temperature range.
It should be noted that, when the difference between the actual temperature and the preset temperature value is small, the opening degree of the electronic expansion valve 13 is finely adjusted, for example, one valve degree is adjusted every second, so that the actual temperature of the electronic control board 1 is quickly adjusted to be within the preset temperature range; when the actual temperature is greatly different from the preset temperature value, the opening degree of the electronic expansion valve 13 is adjusted greatly, for example, three valve degrees are adjusted in one second, so that the electronic control board 1 is quickly adjusted to be within the preset temperature range.
It is understood that the above-mentioned manner of adjusting the electronic expansion valve 13 according to the difference between the actual temperature and the preset temperature is illustrative, and in other embodiments, the adjustment may be performed in other manners.
Of course, if the electric control board 1 is cooled by using the condensed water, the adjusting speed of the water valve 14 is determined according to the mapping relationship between the temperature difference and the adjusting speed of the water valve 14; wherein the adjustment speed is also positively correlated with the temperature difference in the mapping relationship.
As a preferable implementation manner of the control method of the present embodiment, in step S1, the actual temperature may be obtained in real time after the outdoor unit of the air conditioner is turned on; and acquiring the actual water level at set time intervals after the outdoor unit of the air conditioner is started. Therefore, the detection times of the water level sensor can be reduced, and the energy consumption is reduced.
It is understood that the water level may be acquired by real-time acquisition in addition to the manner of acquiring the actual water level at every set time.
Of course, the above alternative embodiments, and the alternative embodiments and the preferred embodiments can also be used in a cross-matching manner, so that a new embodiment is combined to be suitable for a more specific application scenario.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims of the present invention, any of the claimed embodiments may be used in any combination.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is 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. The control method of the outdoor unit of the air conditioner is characterized in that the outdoor unit of the air conditioner comprises an electric control board, an outdoor heat exchanger and a water storage box, wherein the electric control board is provided with a water cooling pipe and a refrigerant heat exchange pipe, the refrigerant heat exchange pipe is connected with the outdoor heat exchanger through an electronic expansion valve, the water cooling pipe is connected with the water storage box through a water valve, and the water storage box is used for being connected with a condensate pipe of an indoor unit; the control method comprises the following steps:
acquiring the actual temperature of the electric control plate and the actual water level of condensed water in the water storage box;
after the outdoor unit of the air conditioner is started, controlling the electronic expansion valve according to the actual temperature, and controlling the water valve according to the actual water level in the process of controlling the electronic expansion valve so as to enable the actual temperature to be within a preset temperature range; wherein the minimum value of the preset temperature range is greater than the dew point temperature of the outdoor environment.
2. The method as claimed in claim 1, wherein the step of controlling the electronic expansion valve according to the actual temperature after the outdoor unit of the air conditioner is turned on, and controlling the water valve according to the actual water level during the step of controlling the electronic expansion valve, further comprises:
comparing the actual water level with a first preset water level and a second water level in the process of controlling the electronic expansion valve;
when the actual water level is greater than or equal to the first preset water level, opening the water valve;
and when the actual water level is less than or equal to the second preset water level, closing the water valve.
3. The control method of claim 2, further comprising, after the step of opening the water valve when the actual water level is greater than or equal to the first preset water level:
closing the electronic expansion valve, and controlling the opening degree of the water valve according to the actual temperature; alternatively, the first and second electrodes may be,
closing the electronic expansion valve, adjusting the opening degree of the water valve to be maximum, and controlling the flow of a water pump connected between the water cooling pipe and the water storage box according to the actual temperature; alternatively, the first and second electrodes may be,
and controlling the electronic expansion valve according to the actual temperature, and adjusting the opening degree of the water valve to be maximum.
4. The control method according to any one of claims 1 to 3, wherein the step of controlling the electronic expansion valve in accordance with the actual temperature includes:
comparing the actual temperature with a preset temperature value; wherein the preset temperature value is within the preset temperature range;
when the actual temperature is lower than the preset temperature value, reducing the opening degree of the electronic expansion valve; when the actual temperature is higher than the preset temperature value, increasing the opening degree of the electronic expansion valve; and when the actual temperature is equal to the preset temperature value, keeping the opening degree of the electronic expansion valve.
5. The control method according to claim 4, wherein the step of controlling the electronic expansion valve according to the actual temperature further comprises:
calculating the temperature difference between the actual temperature and the preset temperature value;
determining the adjusting speed of the electronic expansion valve according to the mapping relation between the temperature difference and the adjusting speed of the electronic expansion valve;
wherein the adjustment speed is positively correlated with the temperature difference in the mapping relationship.
6. The control method according to claim 1, wherein in the step of "acquiring the actual temperature of the electronic control board and the actual water level of the condensed water in the water storage box":
acquiring the actual temperature in real time after the outdoor unit of the air conditioner is started; and acquiring the actual water level at set intervals after the outdoor unit of the air conditioner is started.
7. An outdoor unit for an air conditioner, comprising: the water-cooled heat exchanger comprises an electric control board, an outdoor heat exchanger and a water storage box, wherein a water-cooled tube and a refrigerant heat exchange tube are arranged on the electric control board, the refrigerant heat exchange tube is connected with the outdoor heat exchanger through an electronic expansion valve, the water-cooled tube is connected with the water storage box through a water valve, and the water storage box is used for being connected with a condensate pipe of an indoor unit;
the electric control board includes: a storage, a processor, and a control program of an outdoor unit stored in the storage and operable on the processor, wherein the control program of the outdoor unit, when executed by the processor, implements the control method of the outdoor unit according to any one of claims 1 to 6.
8. The outdoor unit of claim 7, wherein a first pipe and a second pipe are connected to the refrigerant outlet of the outdoor heat exchanger, the first pipe is connected to the refrigerant inlet of the refrigerant heat exchange tube, the second pipe is connected to the refrigerant inlet of the indoor unit, and the electronic expansion valve is disposed on the first pipe.
9. The outdoor unit of claim 7, further comprising a water pump, wherein an inlet of the water pump is communicated with an outlet of the water storage box, an outlet of the water pump is communicated with an inlet of the water cooling pipe, and the water pump is in signal connection with the processor.
10. The outdoor unit of claim 7, wherein an overflow port is formed in the water storage box, and the overflow port is formed above the outdoor heat exchanger; and/or the like and/or,
and the outlet of the water cooling pipe is arranged above the outdoor heat exchanger.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110524379.6A CN113251501A (en) | 2021-05-13 | 2021-05-13 | Air conditioner outdoor unit control method and air conditioner outdoor unit |
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| CN202110524379.6A CN113251501A (en) | 2021-05-13 | 2021-05-13 | Air conditioner outdoor unit control method and air conditioner outdoor unit |
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Cited By (1)
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Application publication date: 20210813 |