CN105042777A - Accumulated snow judging device, air conditioner outdoor unit and snow removal control method - Google Patents
Accumulated snow judging device, air conditioner outdoor unit and snow removal control method Download PDFInfo
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- CN105042777A CN105042777A CN201510412657.3A CN201510412657A CN105042777A CN 105042777 A CN105042777 A CN 105042777A CN 201510412657 A CN201510412657 A CN 201510412657A CN 105042777 A CN105042777 A CN 105042777A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000009825 accumulation Methods 0.000 claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 32
- 239000007788 liquid Substances 0.000 claims abstract description 27
- 238000001514 detection method Methods 0.000 claims description 58
- 238000004891 communication Methods 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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
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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
-
- 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
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
-
- 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
-
- 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
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/52—Weather protecting means, e.g. against wind, rain or snow
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an accumulated snow judging device which is installed on an air conditioner outdoor unit. The accumulated snow judging device comprises an accumulated snow collector which collects accumulated snow fallen on the air conditioner outdoor unit and is provided with an outlet, a heating module which is used for heating the accumulated snow collector when accumulated snow exists on the air conditioner outdoor unit, and a flow detecting module which is installed at the outlet of the accumulated snow collector and used for detecting the flow value of liquid flowing out of the outlet and judging the snow accumulation degree according to the flow value. The invention further discloses the air conditioner outdoor unit and a snow removal control method. Not only can whether accumulated snow exists or not be judged, but also the snow accumulation degree on the air conditioner outdoor unit can be judged. In addition, through the snow accumulation degree judged by the accumulated snow judging device, an outdoor fan is controlled to run at different rotating speeds so that the outdoor fan can remove accumulated snow on the air conditioner outdoor unit, and therefore the energy wasted for snow removal conducted when no snow exists is avoided, and the snow removal efficiency is improved.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to an accumulated snow judging device, an air conditioner outdoor unit and a snow removing control method.
Background
The air conditioner outdoor unit is generally arranged on the outer side, particularly, when the air conditioner outdoor unit with an air port arranged at the top is snowed, the snow accumulated on the air conditioner outdoor unit can influence the use performance of the air conditioner and the reliability of parts, and even cause the outdoor unit to stop running. The existing accumulated snow removing method is to control an outdoor fan to operate for a period of time when the outdoor temperature is lower than 0 ℃. However, the method cannot accurately judge the snow accumulation condition, and the possibility of snow removal without snow exists.
Disclosure of Invention
The invention mainly aims to provide an accumulated snow judging device, an air conditioner outdoor unit and a snow removing control method, and aims to solve the technical problem that accumulated snow cannot be accurately judged in the prior art.
In order to achieve the above object, the present invention provides a snow cover determination device, installed in an outdoor unit of an air conditioner, comprising:
the snow collector is used for collecting snow falling on the air conditioner outdoor unit and is provided with an outlet;
the heating module is used for heating the accumulated snow collector when accumulated snow exists on the air conditioner outdoor unit;
and the flow detection module is arranged at the outlet of the snow cover collector to detect the flow value of the liquid flowing out of the outlet, and the flow value is used for judging the snow cover degree.
Preferably, the snow accumulation determination device further includes:
the snow cover detection module is used for detecting whether snow covers exist on the air conditioner outdoor unit or not;
the control module is used for controlling the heating module to work for a preset time when snow is accumulated on the air conditioner outdoor unit; and acquiring the flow value detected by the flow detection module, and judging the snow accumulation degree according to the flow value.
Preferably, the control module turns on the outdoor fan according to the flow value, and the outdoor fan operates at a rotation speed matched with the flow value.
Preferably, the control module obtains a variation trend of the flow rate value of the liquid flowing out of the outlet after the outdoor fan operates for a preset time, and adjusts the rotating speed of the outdoor fan according to the variation trend.
Preferably, the accumulated snow detection module is a temperature detection unit, is arranged on the air conditioner outdoor unit, and detects the outdoor environment temperature so as to judge whether accumulated snow exists on the air conditioner outdoor unit according to the outdoor environment temperature; or,
the snow cover detection module is a pressure detection unit and is arranged in the snow cover collector to detect the pressure of snow cover in the snow cover collector so as to judge whether snow cover exists on the air conditioner outdoor unit according to the pressure.
Preferably, the snow cover detection module is a wireless communication unit, is arranged in the air-conditioning outdoor unit, communicates with an external device, and acquires weather information corresponding to the current time in the weather forecast information, so as to determine whether snow cover exists on the air-conditioning outdoor unit according to the weather information.
In addition, in order to achieve the above object, an embodiment of the present invention further provides an outdoor unit of an air conditioner, including an outdoor fan and a control panel, and the outdoor unit of the air conditioner further includes an accumulated snow determination device with the above structure, where the accumulated snow determination device detects an accumulated snow degree of the outdoor unit of the air conditioner, and sends the detected accumulated snow degree to the control panel, so that the control panel controls the outdoor fan to operate according to the accumulated snow degree.
In addition, in order to achieve the above object, an embodiment of the present invention further provides a snow removal control method, based on the snow degree determined by a snow determination device installed in an outdoor unit of an air conditioner; the snow removal control method comprises the following steps:
judging whether the air conditioner outdoor unit has accumulated snow or not;
when snow exists in the air conditioner outdoor unit, a snow collector in the snow judging device is heated;
acquiring a flow value of liquid flowing out of an outlet of the accumulated snow collector;
and controlling the outdoor fan to operate at a rotating speed corresponding to the flow value according to the flow value.
Preferably, when snow exists in the outdoor unit of the air conditioner, the snow collector is heated for a preset time.
Preferably, the controlling the outdoor fan to operate at the rotation speed corresponding to the flow value according to the flow value includes:
starting an outdoor fan according to the flow value, wherein the outdoor fan operates at a rotating speed matched with the flow value;
and after the outdoor fan operates for a preset time, acquiring the change trend of the flow rate value of the liquid flowing out of the outlet, and adjusting the rotating speed of the outdoor fan according to the change trend.
Preferably, the determining whether the snow cover exists in the outdoor unit of the air conditioner includes:
detecting the outdoor environment temperature to judge whether the air conditioner outdoor unit has accumulated snow or not according to the outdoor environment temperature; or,
detecting the accumulated snow pressure in the accumulated snow collector to judge whether accumulated snow exists in the air conditioner outdoor unit according to the accumulated snow pressure; or,
and acquiring weather information corresponding to the current time in the weather forecast information so as to judge whether snow exists on the air conditioner outdoor unit according to the weather information.
In the embodiment of the invention, the snow cover collected on the outdoor unit of the air conditioner is collected by the snow cover collector, the heating module heats the snow cover collector, and if the snow cover exists in the snow cover collector, the snow cover is melted after being heated by the heating module and flows out from an outlet arranged on the snow cover collector. At this time, the accumulated snow degree in the accumulated snow collector, that is, the accumulated snow degree on the outdoor unit of the air conditioner can be judged according to the flow value of the liquid flowing out of the outlet. Therefore, the embodiment of the invention not only can accurately judge whether the accumulated snow exists, but also can judge the accumulated snow degree on the air conditioner outdoor unit.
The embodiment of the invention also controls the outdoor fan to operate at different rotating speeds through the accumulated snow degree judged by the accumulated snow judging device so that the outdoor fan clears away the accumulated snow on the outdoor unit of the air conditioner, thereby avoiding the energy waste of snow-free snow removal and improving the snow removal efficiency.
Drawings
FIG. 1 is a schematic structural diagram of an accumulated snow determining apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic view of an accumulated snow judging apparatus according to the present invention installed in an outdoor unit of an air conditioner;
FIG. 3 is a schematic structural diagram of an accumulated snow determining apparatus according to another embodiment of the present invention;
FIG. 4 is a schematic flow chart diagram of a snow removal control method in accordance with an embodiment of the present invention;
fig. 5 is a flow chart of another embodiment of the snow removal control method of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides an accumulated snow judging device which is arranged on an air conditioner outdoor unit and used for judging whether accumulated snow exists on the air conditioner outdoor unit and judging the size of the accumulated snow, namely the degree of the accumulated snow. The outdoor unit of the air conditioner utilizes the accumulated snow degree obtained by the accumulated snow judging device to control the outdoor fan to operate so as to clear away accumulated snow on the outdoor unit of the air conditioner.
As shown in fig. 1, the snow accumulation determination device includes:
an accumulated snow collector 110 for collecting accumulated snow falling on the outdoor unit of the air conditioner, and the accumulated snow collector is provided with an outlet;
a heating module 120 for heating the snow collector 110 when snow is accumulated on the outdoor unit of the air conditioner;
and a flow detection module 130 installed at an outlet of the snow collector 110 to detect a flow value of the liquid flowing out of the outlet, the flow value being used to determine the degree of snow.
The snow cover judging device may be installed on a casing of the outdoor unit of the air conditioner and located on a top of the casing, so that the snow cover collector 110 can better collect snow cover on the outdoor unit of the air conditioner. As shown in fig. 2, the snow cover judging device may also be installed in the casing of the outdoor unit of the air conditioner, and the opening of the snow cover collector 110 in the snow cover judging device extends to the top of the casing, so that the snow cover collector 110 can better collect the snow cover on the outdoor unit of the air conditioner. It is to be understood that the installation position of the snow accumulation determination device in the outdoor unit of the air conditioner is not limited to the above-described embodiment. The top of the casing is determined according to the installation position of the outdoor unit, and thus the top of the casing is not limited. The present invention is not limited to the above-described embodiments, and any other type of snow determining device may be used as long as it is installed at a position where the snow collector 110 can collect snow in the outdoor unit of the air conditioner.
The heating module 120 is a heating rod, and may be disposed in the snow collector 110, or may be tightly attached to an outer wall of the snow collector 110. In order to increase the heating effect, the heating module 120 may be closely attached to the inner wall or the outer wall of the snow collector and may be arranged in a spiral manner.
If snow is accumulated in the snow collector 110, the snow is melted by the heating of the heating module 120 and flows out from an outlet of the snow collector 110. When the accumulated snow in the accumulated snow collector 110 is more, the more liquid flows out after melting; when the accumulated snow in the snow collector 110 is less, the liquid flowing out after melting is less. The accumulated snow level in the accumulated snow collector 110 reflects the accumulated snow level on the outdoor unit of the air conditioner. Therefore, the flow detection module 130 detects the flow value of the liquid flowing out from the outlet, so that not only can whether the air conditioner outdoor unit has accumulated snow be detected, but also the accumulated snow degree on the air conditioner outdoor unit can be judged. The snow level may be displayed to the user to indicate the user's current snow level. Or the snow accumulation degree is sent to a control panel of the air conditioner outdoor unit, so that the control panel controls the operation of the outdoor fan according to the snow accumulation degree, and the snow removing purpose is achieved. The flow rate value is a volume of liquid discharged from the outlet per unit time, that is, a volume of liquid flowing through the flow rate detection module 130 per unit time.
In the embodiment of the present invention, the snow collector 110 collects snow accumulated on the outdoor unit of the air conditioner, the heating module 120 heats the snow collector 110, and if there is snow in the snow collector 110, the snow accumulated after being heated by the heating module 120 will melt and flow out from an outlet provided on the snow collector 110. At this time, the accumulated snow level in the accumulated snow collector 110, that is, the accumulated snow level on the outdoor unit of the air conditioner can be determined according to the flow rate of the liquid flowing out of the outlet. Therefore, the embodiment of the invention not only can accurately judge whether the accumulated snow exists, but also can judge the accumulated snow degree on the air conditioner outdoor unit.
Further, the heating module 120 may be manually controlled to determine the degree of snow accumulated in the outdoor unit of the air conditioner. That is, when the user knows that the outside is snowing, the heating module 120 is turned on, and the degree of the snow accumulated in the outdoor unit of the air conditioner is determined through the flow rate detected by the flow rate detection module 130. In another embodiment, the heating module 120 may also be automatically controlled by a control board on the outdoor unit of the air conditioner, and the control board determines the snow accumulation degree in the outdoor unit of the air conditioner according to the flow rate detected by the flow rate detecting module 130. Specifically, as shown in fig. 3, the snow accumulation determination device may further include:
the snow detection module 140 detects whether snow exists on the air conditioner outdoor unit;
the control module 150 controls the heating module to work for a preset time when snow is accumulated on the air conditioner outdoor unit; and acquiring the flow value detected by the flow detection module, and judging the snow accumulation degree according to the flow value.
The snow detection module 140 is used to detect whether snow is present on the outdoor unit, and may be a direct detection mode or an indirect detection mode. Specifically, the invention provides the following three detection modes:
1. detection method 1
The accumulated snow detecting module 140 is a temperature detecting unit, and is disposed on the outdoor unit of the air conditioner to detect an outdoor environment temperature, so as to determine whether accumulated snow exists on the outdoor unit of the air conditioner according to the outdoor environment temperature. Because the outdoor environment temperature is lower when snowing, generally lower than 0 ℃, in the detection mode, a temperature threshold value is set, and if the temperature threshold value is less than or equal to the temperature threshold value, the accumulated snow on the outdoor unit of the air conditioner is determined; and if the temperature is larger than the temperature threshold, determining that snow does not exist on the air conditioner outdoor unit.
2. Detection method two
The snow detection module 140 is a pressure detection unit, and is disposed in the snow collector 110 to detect the pressure of the snow in the snow collector 110, so as to determine whether the snow is present on the outdoor unit of the air conditioner according to the pressure. The present detection method directly detects the pressure of snow in the snow collector 110 by the pressure detection unit provided in the snow collector 110. When snow is present in the snow collector 110, the pressure detecting unit detects the pressure value. Therefore, by setting a pressure threshold value which is greater than or equal to the pressure threshold value, it is determined that snow is accumulated on the air conditioner outdoor unit; and if the temperature is less than the temperature threshold, determining that snow does not exist on the air conditioner outdoor unit. The detection sensitivity of the pressure detection unit is based on the capability of detecting snow in the snow collector 110, and is not limited herein.
3. Detection mode three
The snow cover detection module 140 is a wireless communication unit, is disposed in the air conditioner outdoor unit, and is in communication with an external device to obtain weather information corresponding to the current time in the weather forecast information, so as to determine whether snow cover exists on the air conditioner outdoor unit according to the weather information. Specifically, the outdoor unit of the air conditioner accesses the internet or communicates with other external devices through the wireless communication unit to obtain weather forecast information of the current day or the current time. For example, the current time is 5 pm, the weather information corresponding to 5 pm on the current day in the weather forecast information is obtained, and the weather information may include temperature, wind direction, weather condition, and the like. Whether snow is present outdoors or not can be judged according to the weather information, and then whether snow is present on the air conditioner outdoor unit or not is judged.
It is understood that the three detection modes can be used independently or in combination to determine whether snow is present in the snow collector 110 more accurately.
The control module 150 may be independently installed, or may be a sub-function module on a circuit control board in the outdoor unit of the air conditioner. Based on the result detected by the snow detection module 140, it is determined whether the heating module 120 is heated, and the time of heating. In this embodiment, the heating time is the time required for the snow in the snow collector 110 to completely melt, and is flexibly set according to specific situations. While heating, the flow detection module 130 will accumulate the flow of the liquid flowing through the outlet, and after the heating time is reached, an accumulated flow value will be obtained. The accumulated flow value is transmitted to the control module 150, so that the control module 150 can determine the accumulated snow level according to the accumulated flow value. Here, a plurality of snow classes may be set, and a flow rate integrated value range corresponding to each class may be set, so that a corresponding snow class is determined based on a specifically detected flow rate integrated value.
The automatic detection of the accumulated snow and the automatic judgment of the accumulated snow degree are realized, the accumulated snow judgment efficiency is improved, and whether the accumulated snow exists or not and the accumulated snow degree can be judged more accurately.
Further, after the control module 150 determines the snow accumulation degree, the outdoor fan may be turned on according to the flow value, and the outdoor fan operates at a rotation speed matched with the flow value. Because this outdoor fan sets up the top side at air condensing units, consequently through opening outdoor fan to make outdoor fan can blow off the snow on the air condensing units. The embodiment of the invention also determines the corresponding rotating speed of the outdoor fan according to the flow value. For example, when the flow value is large, that is, the snow accumulation degree is high, it indicates that the snow accumulation is large, and therefore the snow accumulation on the air conditioner outdoor unit can be blown off only by adopting a high wind speed; when the flow value is small, namely the snow accumulation degree is low, the snow accumulation is low, so that the snow accumulation on the air conditioner outdoor unit can be blown down by adopting a low wind speed.
In this embodiment, the control module 150 may further obtain a variation trend of the flow rate value of the liquid flowing out from the outlet after the outdoor fan operates for a preset time, and adjust the rotation speed of the outdoor fan according to the variation trend. Specifically, the control module 150 obtains a current flow value of the liquid flowing out of the outlet after the outdoor fan operates for a preset time, and compares the current flow value with a flow value obtained last time, so as to determine a variation trend of the flow value. Such as from large to small, from small to large, and so forth. Then, the control module 150 adjusts the rotation speed of the outdoor fan according to the variation trend, for example, if the flow value is changed from large to small, the wind speed of the outdoor fan is correspondingly adjusted to small; and if the flow value is increased from small to large, the wind speed of the outdoor fan is correspondingly increased. After repeated adjustment, the snow removing mode is exited until the flow value of the liquid obtained in the outlet flow is zero, namely snow on the air conditioner outdoor unit is removed. Or when the fan needs to be normally started, the fan exits the snow removing mode. The preset time is set as the time when the outdoor fan reaches a stable state after the rotating speed of the outdoor fan is adjusted.
It can be understood that the rotating speed of the outdoor fan can be adjusted through the gear of the outdoor fan. For example, the current flow value is compared with the last flow value, and when the flow increases and the increase is greater than Δ L, the windshield of the outdoor fan is raised by one gear; when the flow is reduced and the reduction amount is less than delta L, the windshield of the outdoor fan is lowered by one gear; when the flow variation is between [ - Δ L, + Δ L ], the damper of the outdoor fan remains unchanged.
According to the embodiment of the invention, the outdoor fan is controlled to operate at different rotating speeds through the accumulated snow degree judged by the accumulated snow judging device, so that the accumulated snow on the outdoor unit of the air conditioner is removed by the outdoor fan, the energy waste of snow removal without snow is avoided, and the snow removal efficiency is improved.
Correspondingly, the invention also provides a snow removal control method, which is used for controlling the outdoor fan to operate based on the snow accumulation degree judged by the snow accumulation judging device arranged on the outdoor unit of the air conditioner so as to achieve the purpose of removing the snow on the outdoor unit of the air conditioner. As shown in fig. 4, the snow removal control method of the embodiment of the present invention includes the steps of:
step S110, judging whether snow exists in the air conditioner outdoor unit; if yes, the step S120 is carried out, otherwise, the step S110 is executed in a circulating way;
the detection of the presence of the accumulated snow on the outdoor unit can be performed in a direct detection mode or an indirect detection mode. Specifically, the invention provides the following three detection modes:
1. detection method 1
The accumulated snow detecting module 140 is a temperature detecting unit, and is disposed on the outdoor unit of the air conditioner to detect an outdoor environment temperature, so as to determine whether accumulated snow exists on the outdoor unit of the air conditioner according to the outdoor environment temperature. Because the outdoor environment temperature is lower when snowing, generally lower than 0 ℃, in the detection mode, a temperature threshold value is set, and if the temperature threshold value is less than or equal to the temperature threshold value, the accumulated snow on the outdoor unit of the air conditioner is determined; and if the temperature is larger than the temperature threshold, determining that snow does not exist on the air conditioner outdoor unit.
2. Detection method two
The snow detection module 140 is a pressure detection unit, and is disposed in the snow collector 110 to detect the pressure of the snow in the snow collector 110, so as to determine whether the snow is present on the outdoor unit of the air conditioner according to the pressure. The present detection method directly detects the pressure of snow in the snow collector 110 by the pressure detection unit provided in the snow collector 110. When snow is present in the snow collector 110, the pressure detecting unit detects the pressure value. Therefore, by setting a pressure threshold value which is greater than or equal to the pressure threshold value, it is determined that snow is accumulated on the air conditioner outdoor unit; and if the temperature is less than the temperature threshold, determining that snow does not exist on the air conditioner outdoor unit. The detection sensitivity of the pressure detection unit is based on the capability of detecting snow in the snow collector 110, and is not limited herein.
3. Detection mode three
The snow cover detection module 140 is a wireless communication unit, is disposed in the air conditioner outdoor unit, and is in communication with an external device to obtain weather information corresponding to the current time in the weather forecast information, so as to determine whether snow cover exists on the air conditioner outdoor unit according to the weather information. Specifically, the outdoor unit of the air conditioner accesses the internet or communicates with other external devices through the wireless communication unit to obtain weather forecast information of the current day or the current time. For example, the current time is 5 pm, the weather information corresponding to 5 pm on the current day in the weather forecast information is obtained, and the weather information may include temperature, wind direction, weather condition, and the like. Whether snow is present outdoors or not can be judged according to the weather information, and then whether snow is present on the air conditioner outdoor unit or not is judged.
It is understood that the three detection methods can be used independently or in combination to determine whether snow is present in the snow collector 110 more accurately. In addition, because snow can cause the outdoor unit to stop running, in the embodiment of the present invention, whether snow is present in the snow collector 110 can be determined according to the stop running of the outdoor unit of the air conditioner, so as to avoid being in the determination process all the time.
Step S120, heating an accumulated snow collector in the accumulated snow judging device;
and electrifying the heating module to control the heating module to start and heat the accumulated snow collector. In order to accurately determine the amount of accumulated snow in the snow collector, a preset time is set in the present embodiment to melt the accumulated snow in the snow collector. The preset time may be a time required for the accumulated snow in the accumulated snow collector 110 to completely melt.
Step S130, acquiring a flow value of liquid flowing out of an outlet of the accumulated snow collector;
the flow rate value is a volume of liquid discharged from the outlet per unit time, that is, a volume of liquid flowing through the flow rate detection module 130 per unit time.
And S140, controlling the outdoor fan to operate at a rotating speed corresponding to the flow value according to the flow value.
Because this outdoor fan sets up the top side at air condensing units, consequently through opening outdoor fan to make outdoor fan can blow off the snow on the air condensing units. The embodiment of the invention also determines the corresponding rotating speed of the outdoor fan according to the flow value. For example, when the flow value is large, that is, the snow accumulation degree is high, it indicates that the snow accumulation is large, and therefore the snow accumulation on the air conditioner outdoor unit can be blown off only by adopting a high wind speed; when the flow value is small, namely the snow accumulation degree is low, the snow accumulation is low, so that the snow accumulation on the air conditioner outdoor unit can be blown down by adopting a low wind speed.
According to the embodiment of the invention, the outdoor fan is controlled to operate at different rotating speeds through the accumulated snow degree judged by the accumulated snow judging device, so that the accumulated snow on the outdoor unit of the air conditioner is removed by the outdoor fan, the energy waste of snow removal without snow is avoided, and the snow removal efficiency is improved.
Further, as shown in fig. 5, the step S140 includes:
step S141, starting an outdoor fan according to the flow value, wherein the outdoor fan operates at a rotating speed matched with the flow value;
and S142, after the outdoor fan operates for the preset time, acquiring the change trend of the flow rate value of the liquid flowing out of the outlet, and adjusting the rotating speed of the outdoor fan according to the change trend.
Specifically, after the outdoor fan operates for a preset time, the change trend of the flow value is judged by acquiring the current flow value of the liquid flowing out of the outlet and comparing the current flow value with the flow value acquired last time. Such as from large to small, from small to large, and so forth. Then, the control module 150 adjusts the rotation speed of the outdoor fan according to the variation trend, for example, if the flow value is changed from large to small, the wind speed of the outdoor fan is correspondingly adjusted to small; and if the flow value is increased from small to large, the wind speed of the outdoor fan is correspondingly increased. After repeated adjustment, the snow removing mode is exited until the flow value of the liquid obtained in the outlet flow is zero, namely snow on the air conditioner outdoor unit is removed. Or when the fan needs to be normally started, the fan exits the snow removing mode. The preset time is set as the time when the outdoor fan reaches a stable state after the rotating speed of the outdoor fan is adjusted.
It can be understood that the rotating speed of the outdoor fan can be adjusted through the gear of the outdoor fan. For example, the current flow value is compared with the last flow value, and when the flow increases and the increase is greater than Δ L, the windshield of the outdoor fan is raised by one gear; when the flow is reduced and the reduction amount is less than delta L, the windshield of the outdoor fan is lowered by one gear; when the flow variation is between [ - Δ L, + Δ L ], the damper of the outdoor fan remains unchanged.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (11)
1. The utility model provides a device is judged to snow, its characterized in that, device is judged to snow is installed in air condensing units, includes:
the snow collector is used for collecting snow falling on the air conditioner outdoor unit and is provided with an outlet;
the heating module is used for heating the accumulated snow collector when accumulated snow exists on the air conditioner outdoor unit;
and the flow detection module is arranged at the outlet of the snow cover collector to detect the flow value of the liquid flowing out of the outlet, and the flow value is used for judging the snow cover degree.
2. A snow accumulation determination device according to claim 1, further comprising:
the snow cover detection module is used for detecting whether snow covers exist on the air conditioner outdoor unit or not;
the control module is used for controlling the heating module to work for a preset time when snow is accumulated on the air conditioner outdoor unit; and acquiring the flow value detected by the flow detection module, and judging the snow accumulation degree according to the flow value.
3. The snow cover determination device according to claim 2, wherein the control module turns on an outdoor fan according to the flow value, and the outdoor fan operates at a rotation speed matching the flow value.
4. A snow accumulation judging device as claimed in claim 3, wherein the control module obtains a variation trend of the flow rate value of the liquid flowing out of the outlet after the outdoor fan operates for a preset time, and adjusts the rotation speed of the outdoor fan according to the variation trend.
5. The snow cover determination apparatus of claim 2, wherein the snow cover detection module is a temperature detection unit disposed on the outdoor unit of the air conditioner for detecting an outdoor ambient temperature to determine whether snow cover is present on the outdoor unit of the air conditioner according to the outdoor ambient temperature; or,
the snow cover detection module is a pressure detection unit and is arranged in the snow cover collector to detect the pressure of snow cover in the snow cover collector so as to judge whether snow cover exists on the air conditioner outdoor unit according to the pressure.
6. The snow cover determination apparatus of claim 2, wherein the snow cover detection module is a wireless communication unit, is disposed in the air conditioner outdoor unit, and is configured to communicate with an external device to obtain weather information corresponding to a current time in the weather forecast information, so as to determine whether snow cover exists on the air conditioner outdoor unit according to the weather information.
7. An outdoor unit of an air conditioner, comprising an outdoor fan and a control panel, wherein the outdoor unit of the air conditioner further comprises an accumulated snow judging device as claimed in any one of claims 1 to 6, the accumulated snow judging device detects the accumulated snow degree of the outdoor unit of the air conditioner and sends the detected accumulated snow degree to the control panel, so that the control panel controls the outdoor fan to operate according to the accumulated snow degree.
8. A snow removal control method characterized by being based on the snow accumulation determination device according to claim 1; the snow removal control method comprises the following steps:
judging whether accumulated snow exists on the air conditioner outdoor unit;
when snow exists on the air conditioner outdoor unit, the snow collector in the snow judging device is heated;
acquiring a flow value of liquid flowing out of an outlet of the accumulated snow collector;
and controlling the outdoor fan to operate at a rotating speed corresponding to the flow value according to the flow value.
9. The snow removal control method of claim 8, wherein the snow collector is heated for a predetermined time when snow is present in the outdoor unit of the air conditioner.
10. The snow removal control method according to claim 8, wherein said controlling the outdoor fan to operate at a rotation speed corresponding to the flow value based on the flow value includes:
starting an outdoor fan according to the flow value, wherein the outdoor fan operates at a rotating speed matched with the flow value;
and after the outdoor fan operates for a preset time, acquiring the change trend of the flow rate value of the liquid flowing out of the outlet, and adjusting the rotating speed of the outdoor fan according to the change trend.
11. The snow removal control method according to claim 8, wherein the determining whether snow is present in the outdoor unit of the air conditioner includes:
detecting the outdoor environment temperature to judge whether the air conditioner outdoor unit has accumulated snow or not according to the outdoor environment temperature; or,
detecting the accumulated snow pressure in the accumulated snow collector to judge whether accumulated snow exists in the air conditioner outdoor unit according to the accumulated snow pressure; or,
and acquiring weather information corresponding to the current time in the weather forecast information so as to judge whether snow exists on the air conditioner outdoor unit according to the weather information.
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| CN107062522A (en) * | 2017-02-07 | 2017-08-18 | 广东美的暖通设备有限公司 | Accumulated snow detection means, method and air-conditioning system |
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