CN111426021B - Air duct type air conditioner and operation control method and device thereof - Google Patents
Air duct type air conditioner and operation control method and device thereof Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000005057 refrigeration Methods 0.000 claims abstract description 25
- 238000001816 cooling Methods 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 6
- 238000005299 abrasion Methods 0.000 abstract description 5
- 230000032683 aging Effects 0.000 abstract description 5
- 239000003570 air Substances 0.000 description 431
- 230000000694 effects Effects 0.000 description 17
- 239000003507 refrigerant Substances 0.000 description 13
- 238000004590 computer program Methods 0.000 description 6
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000009529 body temperature measurement Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
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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
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0035—Indoor units, e.g. fan coil units characterised by introduction of outside air to the room
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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
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
- F24F1/0047—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in the ceiling or at the ceiling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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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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Abstract
The invention relates to the technical field of air conditioners, in particular to an air duct type air conditioner and an operation control method and device thereof, and aims to solve the problem of how to meet the refrigeration requirement of places with high indoor temperature and low outdoor temperature. Therefore, the method for operating the air duct type air conditioner provided by the embodiment of the invention can judge whether to adjust the operating mode of the air duct type air conditioner or not according to the temperature difference delta T between the indoor temperature and the outdoor temperature regularly when the air duct type air conditioner operates in the refrigerating mode. If the operation mode is judged to be required to be adjusted, the refrigeration mode is adjusted to be the air supply mode, and the outdoor low-temperature air is utilized to cool the indoor air. Because the compressor is in a stop state in the air supply mode, the embodiment of the invention can meet the refrigeration requirement of places with high indoor temperature and low outdoor temperature, and can also avoid the problems of abrasion, aging, short service life and the like caused by long-time operation of the compressor.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air duct type air conditioner and an operation control method and device thereof.
Background
An Air Conditioner (Air Conditioner) is a device capable of adjusting parameters such as temperature, humidity and the like of ambient Air in a building, and an operation mode of the Air Conditioner generally mainly includes a heating mode and a cooling mode. For example: the indoor temperature is reduced by adopting a refrigeration mode in summer, and is increased by adopting a heating mode in winter. However, for some places with high indoor temperature and low outdoor temperature (such as hot pot in winter), because the pressure of the refrigerant pipeline in the air conditioner is affected by the ambient temperature, the higher the temperature is, the lower the pressure of the refrigerant pipeline is, so in the place with high indoor temperature and low outdoor temperature, the pressure of the air conditioner high-pressure system (the air conditioner high-pressure system is positioned at the front side of the throttle valve in the refrigerant pipeline) positioned outdoors becomes low, the pressure of the air conditioner low-pressure system (the air conditioner low-pressure system is positioned at the rear side of the throttle valve in the refrigerant pipeline) positioned indoors becomes high, the pressure difference between the air conditioner high-pressure system and the air conditioner low-pressure system becomes small (the pressure difference between the front side and the rear side of the throttle valve becomes small), the circulation flow of the refrigerant in the refrigerant pipeline becomes small, the air conditioner refrigerating effect becomes poor, and the refrigerating requirement of the place with high indoor temperature and low outdoor temperature cannot be satisfied.
Accordingly, there is a need in the art for a new air conditioning solution to the above-described problems.
Disclosure of Invention
The present invention has been made to overcome the above drawbacks, and an object of the present invention is to provide an air duct type air conditioner and an operation control method and apparatus thereof, which solve or at least partially solve the problem of how to meet the cooling requirements of a place with a high indoor temperature and a low outdoor temperature (e.g., a hot pot shop in winter).
In a first aspect, an operation control method of an air duct type air conditioner is provided, an indoor unit of the air duct type air conditioner includes an outdoor return air grid, and the outdoor return air grid is connected to the outside through an air duct, so that outdoor air can enter an air duct of the indoor unit through the outdoor return air grid; the operation control method comprises the following steps:
when the air duct type air conditioner operates in a refrigerating mode, detecting indoor temperature and outdoor temperature at regular time;
judging whether to adjust the operation mode of the air duct type air conditioner according to the temperature difference delta T between the indoor temperature and the outdoor temperature; if yes, the outdoor return air grid is controlled to be opened, and the refrigerating mode is adjusted to be an air supply mode, so that the outdoor low-temperature air is used for cooling indoor air;
wherein the temperature difference Δt=t Indoor unit -T Outdoor unit The T is Indoor unit And T Outdoor unit Indoor temperature and outdoor temperature, respectively.
In one embodiment of the above operation control method, the indoor unit further includes an indoor return air grid, and the indoor return air grid is connected to the indoor through an air pipe, so that indoor air can enter the indoor unit air flue through the indoor return air grid;
the step of detecting the indoor temperature and the outdoor temperature at fixed time when the air duct type air conditioner operates in the refrigeration mode specifically comprises the following steps:
after the air duct type air conditioner starts a refrigerating mode, the indoor return air grid is controlled to be opened and the outdoor return air grid is controlled to be closed, and then the indoor temperature and the outdoor temperature are detected at regular time.
In one embodiment of the above operation control method, the step of determining whether to adjust the operation mode of the air duct type air conditioner according to the temperature difference Δt between the indoor temperature and the outdoor temperature specifically includes:
if DeltaT<ΔT 1 Continuously controlling the opening of the indoor return air grid and the closing of the outdoor return air grid, and not adjusting the operation mode of the air duct type air conditioner;
if DeltaT>ΔT 2 Controlling the indoor return air grid to be closed and the outdoor return air grid to be opened, and then adjusting the refrigeration mode to be an air supply mode;
if DeltaT 1 <ΔT<ΔT 2 Then the indoor return air grid and the outdoorThe opening of the return air grid is respectively adjusted to a preset opening value, and the operation mode of the air duct type air conditioner is not adjusted;
wherein the preset opening value is smaller than the maximum opening of the indoor air return grid and the outdoor air return grid, and the delta T is 1 And DeltaT 2 A preset lower temperature difference limit and an upper temperature difference limit respectively.
In one embodiment of the above operation control method, after the outdoor return air grille is opened, the method further comprises:
judging whether the temperature difference delta T between the indoor temperature and the outdoor temperature detected within a certain period of time is smaller than a preset temperature difference threshold value;
if each temperature difference delta T is smaller than a preset temperature difference threshold value within the certain time period, controlling the indoor return air grid to be opened and the outdoor return air grid to be closed, and then judging whether a compressor in an outdoor unit of the air duct type air conditioner is in a stop state or not;
if the compressor is in a stop state, continuously judging whether the stop time length of the compressor reaches a preset time length threshold value; if yes, the air supply mode is adjusted to be a refrigerating mode; if not, after the downtime reaches a preset time threshold, the air supply mode is adjusted to be a refrigeration mode.
In one embodiment of the above operation control method, when Δt <0, determining whether a fresh air instruction is received; if yes, the outdoor return air grid is controlled to be opened according to the fresh air instruction.
In one embodiment of the above operation control method, the method further includes:
when the air duct type air conditioner operates in a heating mode, the indoor return air grid is controlled to be opened and the outdoor return air grid is controlled to be closed;
judging whether a fresh air instruction is received or not; if yes, the outdoor return air grid is controlled to be opened according to the fresh air instruction.
In a second aspect, a control device is provided, which comprises a processor and a storage device, the storage device being adapted to store a plurality of program codes, the program codes being adapted to be loaded and executed by the processor to perform the method for controlling the operation of the ducted air conditioner according to any one of the above embodiments.
In a third aspect, there is provided an air duct type air conditioner including an indoor unit and an outdoor unit; the indoor unit comprises the control device as claimed in claim 5, an indoor return air grid, an outdoor return air grid and a return air temperature sensor arranged in an air duct of the indoor unit; the outdoor unit comprises a compressor and an outdoor temperature sensor; the indoor return air grid is connected into the room through an air pipe, so that indoor air can enter the indoor unit air flue through the indoor return air grid; the outdoor return air grid is connected to the outside through an air pipe, so that outdoor air can enter the air flue of the indoor unit through the outdoor return air grid;
the control device is configured to detect indoor temperature and outdoor temperature through the return air temperature sensor and the outdoor temperature sensor respectively and control the operation of the air duct type air conditioner according to the detection result.
In one embodiment of the above air duct type air conditioner, the indoor unit further includes an evaporator, a return air duct driving device for driving the indoor return air duct and the outdoor return air duct to be opened/closed, and a motor/fan for driving air in the air duct of the indoor unit to flow;
the motor/fan is arranged at the front side of the evaporator in the front-to-back direction along the air flow in the air duct of the indoor unit; or,
the motor/fan is disposed at the rear side of the evaporator in the front-to-rear direction along the air flow in the indoor unit duct.
The technical scheme provided by the invention has at least one or more of the following beneficial effects:
in the technical scheme of the invention, when the air duct type air conditioner operates in the refrigerating mode, whether the operation mode of the air duct type air conditioner is adjusted can be judged regularly according to the temperature difference delta T between the indoor temperature and the outdoor temperature. If the operation mode is judged to be required to be adjusted, the refrigeration mode is adjusted to be the air supply mode, and the outdoor low-temperature air is utilized to cool the indoor air. Because the compressor is in a stop state in the air supply mode, the invention not only can achieve the aim of refrigeration, but also can avoid the problems of abrasion, aging, short service life and the like caused by long-time operation of the compressor.
In addition, in the technical scheme of the invention, in order to effectively utilize the outdoor low-temperature air to cool the indoor air, the invention also improves the structure of the indoor unit of the air duct type air conditioner. Specifically, an outdoor return air grid is arranged in the indoor unit, and the outdoor return air grid is connected to the outside through an air pipe, so that outdoor air can enter an air flue of the indoor unit through the outdoor return air grid. When judging that the refrigerating mode needs to be adjusted to be an air supply mode, controlling the outdoor air return grid to be opened, adjusting the refrigerating mode to be the air supply mode, enabling outdoor cold air to enter the air channel of the indoor unit through the outdoor air return grid under the driving of the air supply mode, and finally enabling the outdoor cold air to flow into the room through the air outlet of the air channel of the indoor unit to cool the room.
Drawings
Embodiments of the invention are described below with reference to the accompanying drawings, in which:
fig. 1 is a flow chart illustrating main steps of an operation control method of an air duct type air conditioner according to an embodiment of the present invention;
fig. 2 is a schematic view of the main structure of an air duct type air conditioner according to an embodiment of the present invention;
fig. 3 is a schematic view showing a main structure of an air duct type air conditioner according to another embodiment of the present invention
List of reference numerals:
11: an evaporator; 12: a motor/fan; 13: an outdoor return air grid; 131: a filter screen; 14: an indoor return air grid; 15: a return air temperature sensor; 2: an outdoor unit; 3: a wall body.
Detailed Description
Some embodiments of the invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
In the description of the present invention, a "module," "processor" may include hardware, software, or a combination of both. A module may comprise hardware circuitry, various suitable sensors, communication ports, memory, or software components, such as program code, or a combination of software and hardware. The processor may be a central processor, a microprocessor, an image processor, a digital signal processor, or any other suitable processor. The processor has data and/or signal processing functions. The processor may be implemented in software, hardware, or a combination of both. Non-transitory computer readable storage media include any suitable medium that can store program code, such as magnetic disks, hard disks, optical disks, flash memory, read-only memory, random access memory, and the like. The term "a and/or B" means all possible combinations of a and B, such as a alone, B alone or a and B. The term "at least one A or B" or "at least one of A and B" has a meaning similar to "A and/or B" and may include A alone, B alone or A and B. The singular forms "a", "an" and "the" include plural referents.
For some places with high indoor temperature and low outdoor temperature (such as a hot pot shop in winter), as the pressure of a refrigerant pipeline in an air conditioner is influenced by the ambient temperature, the pressure of the refrigerant pipeline with higher temperature is higher, and the pressure of the refrigerant pipeline with lower temperature is lower, in the places with low indoor temperature and outdoor temperature, the pressure of an air conditioner high-pressure system positioned outdoors is lower, the pressure of an air conditioner low-pressure system positioned indoors is higher, so that the pressure difference between the air conditioner high-pressure system and the air conditioner low-pressure system is smaller, the circulation flow of the refrigerant in the refrigerant pipeline is smaller, and the air conditioner refrigerating effect is further deteriorated. In order to solve the above problems, the conventional air conditioner refrigeration operation method at present mainly comprises the steps of adjusting the rotation speed of an outdoor fan and/or reducing the heat exchange area of an outdoor heat exchanger to enable the temperature of an outdoor unit to rise as much as possible when the outdoor environment temperature is low, and further enabling the pressure of an air conditioner high-pressure system to rise as much as possible, so that the pressure difference between the air conditioner high-pressure system and an air conditioner low-pressure system is increased, the circulation flow amount of a refrigerant in a refrigerant pipeline is enabled to be increased, and the refrigeration effect of the air conditioner is improved. However, this method requires long-time operation of the outdoor unit to reduce and maintain a good refrigerating effect, and components such as a compressor in the outdoor unit are easily worn and aged under long-time operation, resulting in reduced life of the components. In addition, the compressor can consume larger electric energy even if running for a long time, and the energy saving purpose of the air conditioner can not be realized.
In the embodiment of the invention, when the air duct type air conditioner operates in the refrigeration mode, whether to adjust the operation mode of the air duct type air conditioner can be judged regularly according to the temperature difference delta T between the indoor temperature and the outdoor temperature. If the operation mode is judged to be required to be adjusted, the refrigeration mode is adjusted to be the air supply mode, and the outdoor low-temperature air is utilized to cool the indoor air. Because the compressor is in a stop state in the air supply mode, the invention not only can achieve the aim of refrigeration, but also can avoid the problems of abrasion, aging, service life reduction and the like of the compressor caused by long-time operation. In order to effectively utilize outdoor low-temperature air to cool indoor air, the invention also improves the structure of the indoor unit of the air duct type air conditioner. Specifically, an indoor return air grid and an outdoor return air grid are arranged in the indoor unit. The indoor air return grid is connected into the room through an air pipe, so that indoor air can enter the air flue of the indoor unit through the indoor air return grid; the outdoor return air grid is connected to the outdoor through an air pipe, so that outdoor air can enter the air channel of the indoor unit through the outdoor return air grid. When judging that the refrigerating mode is required to be adjusted to be an air supply mode, the outdoor air return grid is controlled to be opened, then the refrigerating mode is adjusted to be the air supply mode, outdoor cold air enters the air channel of the indoor unit through the outdoor air return grid under the driving of the air supply mode, and finally flows into a room through the air outlet of the air channel of the indoor unit to cool the room.
Referring to fig. 1, fig. 1 is a flow chart illustrating main steps of an operation control method of an air duct type air conditioner according to an embodiment of the present invention. In this embodiment, an indoor air return grid and an outdoor air return grid are disposed in the indoor unit. The indoor air return grid is connected into the room through an air pipe, so that indoor air can enter the air flue of the indoor unit through the indoor air return grid; the outdoor return air grid is connected to the outdoor through an air pipe, so that outdoor air can enter the air channel of the indoor unit through the outdoor return air grid. As shown in fig. 1, the operation control method of the air duct type air conditioner in the embodiment of the invention mainly includes the following steps:
step S101: when the air duct type air conditioner operates in a refrigerating mode, the indoor temperature and the outdoor temperature are detected at fixed time.
The indoor temperature refers to the temperature in the place (building) where the indoor unit of the ducted air conditioner is located, and the outdoor temperature refers to the temperature in the place (outside the building) where the indoor unit of the ducted air conditioner is located.
In one embodiment, the indoor temperature and the outdoor temperature may be detected as follows: after the air duct type air conditioner starts the refrigerating mode, the indoor return air grid is controlled to be opened and the outdoor return air grid is controlled to be closed, and then the indoor temperature and the outdoor temperature are detected at regular time (10 minutes intervals).
When the temperature is measured by using a temperature detection device such as a temperature sensor arranged in the air duct of the indoor unit, the outdoor return air grid is closed, so that the outdoor cold air can be prevented from flowing into the air duct of the indoor unit, and the temperature measurement result of the temperature detection device is prevented from being influenced. Further, the indoor return air grid is opened, so that the air temperature in the air duct of the indoor unit is closer to the indoor air temperature, and the temperature measurement result of the temperature detection device is closer to the indoor air temperature.
Step S102: and judging whether to adjust the operation mode of the air duct type air conditioner according to the temperature difference between the indoor temperature and the outdoor temperature. Wherein the temperature difference Δt=t between the indoor temperature and the outdoor temperature Indoor unit -T Outdoor unit ，T Indoor unit And T Outdoor unit Indoor temperature and outdoor temperature, respectively. Specifically, if it is determined that the operation mode needs to be adjusted, the process goes to step S103; if it is determined that the operation mode does not need to be adjusted, the process goes to step S104.
In one embodiment, determining whether to adjust an operation mode of the duct type air conditioner according to a temperature difference Δt between an indoor temperature and an outdoor temperature specifically includes:
(1) If DeltaT<ΔT 1 Then continuously controlling the indoor return air grid to be opened and the outdoor return airThe air grid is closed, and the operation mode of the air duct type air conditioner is not adjusted. Wherein DeltaT 1 Is the preset lower limit of the temperature difference, delta T 1 Is a smaller value and deltaT 1 >0 indicates that the indoor temperature is relatively close to the outdoor temperature. One example is: delta T 1 ＝5°。ΔT<ΔT 1 Including DeltaT<0 and 0<ΔT<ΔT 1 In the following, a specific explanation will be given of why the operation mode of the ducted air conditioner is not adjusted in the two cases, respectively.
If DeltaT<0, then indicate the indoor temperature T Indoor unit Less than the outdoor temperature T Outdoor unit Since the indoor temperature is generally lower than the outdoor temperature in summer, this indicates that the air conditioner may be in a summer cooling state. From the above analysis, it is found that there is no problem that the air conditioner high pressure system pressure becomes low and the air conditioner low pressure system pressure becomes high due to the influence of temperature during cooling in summer, and thus the air conditioner cooling effect becomes poor, and thus, there is no need to adjust the operation mode of the air conditioner. Further, in one embodiment, due to ΔT<0 indicates that the air conditioner is in a summer refrigerating state, so that whether a fresh air instruction is received or not can be judged; if a fresh air instruction is received, the user is required to have fresh air (fresh air), and the outdoor return air grid can be controlled to be opened according to the fresh air instruction, so that outdoor fresh air can enter the indoor unit air channel through the outdoor return air grid, and then enter the room through the air outlet of the indoor unit air channel.
If 0 is<ΔT<ΔT 1 Indicating the indoor temperature T Indoor unit Greater than the outdoor temperature T Outdoor unit Since the indoor temperature is generally higher than the outdoor temperature in winter, this indicates that the air conditioner may be in a winter cooling state. However, since the indoor temperature is relatively close to the outdoor temperature, if the indoor temperature is lowered by using the outdoor cool air, a good cooling effect cannot be achieved, and thus, it is not necessary to adjust the operation mode of the air conditioner.
(2) If DeltaT>ΔT 2 The indoor return air grid is controlled to be closed and the outdoor return air grid is controlled to be opened, and then the refrigerating mode is adjusted to be an air supply mode. Wherein DeltaT 2 Is the preset upper limit of the temperature difference, delta T 2 Is a largerAnd DeltaT 2 >ΔT 1 Indicating that the indoor temperature is relatively different from the outdoor temperature. One example is: if DeltaT 2 ＝12°。
ΔT>ΔT 2 Then indicate the indoor temperature T Indoor unit Greater than the outdoor temperature T Outdoor unit Since the indoor temperature is generally higher than the outdoor temperature in winter, this indicates that the air conditioner may be in a winter cooling state. At the same time due to the outdoor temperature T Outdoor unit And the temperature of the indoor space can be reduced by using outdoor cold air so as to achieve a better refrigerating effect. Specifically, the outdoor air return grid is opened first, then the refrigerating mode is adjusted to be an air supply mode, and then outdoor cold air can be sent into the indoor air channel under the driving of the air supply mode, and then enters the room through the air outlet of the indoor unit air channel, so that the indoor is cooled. In addition, in order to further improve the refrigerating effect of the air supply mode, the opening degree of the outdoor return air grid can be adjusted to be maximum.
(3) If DeltaT 1 <ΔT<ΔT 2 And respectively adjusting the opening of the indoor return air grid and the opening of the outdoor return air grid to a preset opening value, and not adjusting the operation mode of the air duct type air conditioner. From the above analysis, it can be seen that DeltaT 1 And DeltaT 2 The temperature difference is respectively a preset lower temperature difference limit and a preset upper temperature difference limit, and when the temperature difference delta T is between the lower temperature difference limit and the upper temperature difference limit, a certain difference exists although the indoor temperature is relatively close to the outdoor temperature. If the outdoor cold air is used alone to cool the indoor space, a good refrigerating effect may not be achieved. Based on the air flow principle, the hot air pressure is low, the cold air pressure is high, and cold air flows to the hot air, so that the opening of the outdoor return air grid can be adjusted to a preset opening value (such as half of the maximum opening) in the case, under the action of the pressure difference between the indoor hot air and the outdoor cold air, the outdoor cold air can flow into the indoor air channel through the outdoor return air grid, and the natural flow amount of the outdoor cold air is far lower than the flow amount in the air supply mode. At the same time, the opening of the indoor air return grid is also adjusted to a preset opening value (such as the maximum openingHalf of the total number of the indoor units) is cooled by using the air circulated in the indoor units.
Step S103: the outdoor return air grille is controlled to open and the refrigeration mode is adjusted to the air supply mode.
Step S104: the air duct type air conditioner is controlled to continue to operate in the refrigeration mode.
According to the embodiment of the invention, the operation mode of the air duct type air conditioner is adjusted according to the temperature difference delta T between the indoor temperature and the outdoor temperature, and if the operation mode is judged to be needed to be adjusted, the refrigeration mode is adjusted to be the air supply mode, and the indoor air is cooled by utilizing the outdoor low-temperature air. Because the compressor is in a stop state in the air supply mode, the embodiment of the invention not only can achieve the aim of refrigerating, but also can avoid the problems of abrasion, aging, short service life and the like of the compressor caused by long-time operation.
In one embodiment, after the outdoor return air grid is opened, the method further comprises the step of analyzing the refrigeration effect of utilizing the outdoor cold air to refrigerate according to the temperature difference delta T between the indoor temperature and the outdoor temperature, and judging whether to close the outdoor return air grid according to the analysis result. The method specifically comprises the following steps:
step 1: and judging whether the temperature difference delta T between the indoor temperature and the outdoor temperature detected within a certain period of time is smaller than a preset temperature difference threshold value. Wherein the preset temperature difference threshold is smaller than a preset temperature difference lower limit delta T 1 Is a temperature value of (a). One example is: if DeltaT 1 =5°, the preset temperature difference threshold may be 3 °.
If each temperature difference delta T is smaller than a preset temperature difference threshold value within a certain period of time (the temperature difference delta T is continuously smaller than the preset temperature difference threshold value), the indoor temperature is relatively close to the outdoor temperature, if the outdoor cold air is continuously utilized to cool the indoor, the refrigerating effect is not further improved, and the step 2 can be performed at the moment; if a certain temperature difference deltat is greater than or equal to a preset temperature difference threshold value within a certain period of time (the temperature difference deltat is not continuously smaller than the preset temperature difference threshold value), the possibility that the difference between the indoor temperature and the outdoor temperature is relatively large still exists is indicated, if the outdoor cold air is continuously utilized to cool the indoor, the refrigerating effect is further improved, and the step 5 can be performed at this time.
Step 2: and controlling the indoor return air grid to be opened and the outdoor return air grid to be closed, and judging whether the compressor in the outdoor unit of the air pipe type air conditioner is in a stop state or not. Specifically, if the compressor is in a stop state, turning to step 3; if the compressor is in the working state, go to step 4.
Step 3: from the above analysis, it is shown that the ducted air conditioner is operated in the air supply mode if the compressor is in the stopped state. And because the temperature difference delta T between the indoor temperature and the outdoor temperature is continuously smaller than the preset temperature difference threshold value for a certain period of time, if the outdoor cold air is continuously utilized to cool the indoor, the refrigerating effect is not further improved, and therefore the air supply mode is required to be adjusted to be a refrigerating mode.
Further, in order to prevent damage to the compressor caused by frequent start-stop, before the air supply mode is adjusted to the refrigeration mode, whether the shutdown time of the compressor reaches a preset time threshold can be judged; if the air supply mode is reached, starting the compressor and adjusting the air supply mode to a refrigeration mode; if the air supply mode does not reach the preset time threshold, the air supply mode is adjusted to be the refrigeration mode after the machine halt time reaches the preset time threshold.
Step 4: from the foregoing analysis, it is shown that the air duct type air conditioner is still operated in the cooling mode if the compressor is not in the stopped state. And because the temperature difference delta T between the indoor temperature and the outdoor temperature is continuously smaller than the preset temperature difference threshold value for a certain period of time, if the indoor temperature is continuously reduced by using the outdoor cold air, the refrigerating effect is not further improved, and therefore the outdoor return air grid is required to be closed, and meanwhile, the operation mode of the air pipe type air conditioner is not adjusted.
Step 5: from the above analysis, if the temperature difference Δt is not continuously smaller than the preset temperature difference threshold value within a certain period of time, it indicates that there may be a situation that the difference between the indoor temperature and the outdoor temperature is relatively large, and the cooling effect is further improved by continuously using the outdoor cool air to cool the indoor, so that the outdoor return air grid does not need to be closed, and the operation mode of the air duct type air conditioner does not need to be adjusted. For example: at DeltaT>ΔT 2 Under the condition of (1), air duct type air conditionerThe device continues to operate in an air supply mode; at DeltaT 1 <ΔT<ΔT 2 In the case of the air duct type air conditioner, the air duct type air conditioner continues to operate in the cooling mode.
In one embodiment, when the air duct type air conditioner operates in a heating mode, the indoor return air grid can be controlled to be opened and the outdoor return air grid can be controlled to be closed, so that outdoor air is prevented from entering an air duct of the indoor unit through the outdoor return air grid to influence the heating effect of the air conditioner. However, when a fresh air instruction is received, the user is indicated to have a fresh air demand, and the outdoor return air grid can be controlled to be opened according to the fresh air instruction, so that outdoor fresh air can enter the indoor unit air channel through the outdoor return air grid, and then enter the room through the air outlet of the indoor unit air channel, and the fresh air demand of the user is met.
It should be noted that, although the foregoing embodiments describe the steps in a specific order, it will be understood by those skilled in the art that, in order to achieve the effects of the present invention, the steps are not necessarily performed in such an order, and may be performed simultaneously (in parallel) or in other orders, and these variations are within the scope of the present invention.
In yet another embodiment of the present invention, a control apparatus is also provided. In this embodiment of the control device, the control device may include a processor and a storage device, where the storage device is adapted to store a plurality of program codes, where the program codes are adapted to be loaded and executed by the processor to perform the specific steps of the operation control method of the air duct type air conditioner described in the above embodiment of the operation control method of the air duct type air conditioner. For convenience of description, only those parts related to the embodiments of the present specification are shown, and specific technical details are not disclosed, please refer to the method parts of the embodiments of the present specification. The control device may be a server device including various electronic devices, a PC computer, a network cloud server, or the like.
In yet another embodiment of the present invention, a ducted air conditioner is also provided. In the ducted air conditioner embodiment, the ducted air conditioner may include an indoor unit and an outdoor unit. The indoor unit comprises the control device, an indoor return air grid, an outdoor return air grid and a return air temperature sensor arranged in an air duct of the indoor unit. The outdoor unit may include a compressor and an outdoor temperature sensor. Specifically, the indoor return air grid is connected into the room through an air pipe, so that indoor air can enter the indoor unit air flue through the indoor return air grid; the outdoor return air grid is connected to the outdoor through an air pipe, so that outdoor air can enter the air channel of the indoor unit through the outdoor return air grid. The control device may be configured to detect an indoor temperature and an outdoor temperature through the return air temperature sensor and the outdoor temperature sensor, respectively, and to perform an operation control of the ducted air conditioner according to the detection result.
Referring to fig. 2, fig. 2 is a schematic view illustrating a main structure of a ducted type air conditioner according to an embodiment of the present invention. As shown in fig. 2, the duct type air conditioner includes an indoor unit and an outdoor unit 2. The indoor unit may include an evaporator 11, a motor/fan 12, an outdoor return air grille 13, an indoor return air grille 14, and a return air temperature sensor 15. The air pipe of the air duct of the indoor unit passes through the wall body 3 to enter the outdoor through the outdoor return air grid 13. The filter screen 131 is arranged on the inner side (the side close to the wall body 3) of the outdoor return air grid 13, and the filter screen 131 can filter out impurities such as dust, particles and the like in the outdoor air. The arrow "→" indicates the air flow direction in the air duct of the indoor unit, and the air flow direction mainly includes the flow from the outdoor return air grid 13 to the motor/fan 12, the return air temperature sensor 15 and the evaporator 11 in sequence, and the flow from the indoor return air grid 14 to the motor/fan 12, the return air temperature sensor 15 and the evaporator 11 in sequence.
In this embodiment, the motor/fan 12 mainly includes a blower motor and a fan, and the blower motor is used to drive the fan to rotate, so as to blow the air flowing from the outdoor return air grille 13 and the indoor return air grille 14 into the air duct of the indoor unit. When the ducted air conditioner is operated in the heating mode, the temperature of the evaporator 11 is relatively high, so that the temperature of the air flowing through the evaporator 11 is increased. If the motor/fan 12 is disposed at the rear side of the evaporator 11 (in the direction from front to rear in the indoor unit duct), the high temperature air may affect the normal operation of the motor/fan 12 (e.g., overheat phenomenon occurs). In order to overcome the above problems, as shown in fig. 2, the embodiment of the present invention arranges the motor/fan 12 at the front side of the evaporator 11 in the front-to-rear direction along the air flow in the air duct of the indoor unit, thereby ensuring that the motor/fan 12 can normally operate in the heating mode.
Further, if the motor/fan 12 is disposed at the front side of the evaporator 11 (in the front-to-rear direction of the air flow in the indoor unit duct), a large noise is generated due to the large resistance of the evaporator 11. Meanwhile, in practical applications, the indoor unit duct may be relatively long (e.g., the indoor space is relatively large), and then the motor/fan 12 is disposed at the front side of the evaporator 11, and air may not be driven to the air outlet of the indoor unit duct. Accordingly, the installation position of the motor/fan 12 may be selected according to the application scenario of the ducted type air conditioner in consideration of the above-described problems. Specifically, for an application scenario where the indoor unit duct is relatively short or the operation noise requirement for the ducted air conditioner is relatively low, the motor/fan 12 may be disposed on the front side of the evaporator 11 (in the front-to-rear direction of the air flow in the indoor unit duct). For applications where the indoor unit duct is relatively long or where the operating noise requirements for the ducted air conditioner are relatively high, the motor/fan 12 may be disposed at the rear side of the evaporator 11 (as shown in fig. 3, the motor/fan 12 is disposed at the rear side of the evaporator 11 in the front-to-rear direction along the indoor unit duct in which air flows).
In this embodiment, the indoor unit of the ducted air conditioner further includes a return air grille driving device (not shown in fig. 2) for driving the outdoor return air grille 13 to be opened and closed with respect to the indoor return air grille 14. In one embodiment, the return air grid driving device may include an outdoor return air grid driving module for driving the outdoor return air grid 13 to open and close, and an indoor return air grid driving module for driving the indoor return air grid 14 to open and close. One example is: the outdoor return air grid driving module and the indoor return air grid driving module respectively comprise a Stepping Motor (Stepping Motor), and the Stepping Motor drives the corresponding return air grids to be opened and closed. It should be noted that, although the present invention only provides an embodiment of driving the return air grid to open and close by using a stepping motor, it will be readily understood by those skilled in the art that the scope of the present invention is not limited to this specific embodiment. Other driving means may be employed by those skilled in the art to control the opening and closing of the return air grid without departing from the principles of the present invention, and such modifications or alternatives will fall within the scope of the present invention.
It should be noted that, the components such as the evaporator and the compressor in the embodiments of the present invention are conventional components in the art, and specific implementation functions of these components are not specifically described herein for simplicity of description.
It will be appreciated by those skilled in the art that the invention may implement all or part of the above-described methods in one embodiment, or may be implemented by means of a computer program for instructing relevant hardware, where the computer program may be stored in a computer readable storage medium for implementing the steps of the respective method embodiments described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device, medium, usb disk, removable hard disk, magnetic disk, optical disk, computer memory, read-only memory, random access memory, electrical carrier wave signals, telecommunications signals, software distribution media, and the like capable of carrying the computer program code. It should be noted that the computer readable medium contains content that can be appropriately scaled according to the requirements of jurisdictions in which such content is subject to legislation and patent practice, such as in certain jurisdictions in which such content is subject to legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunication signals.
The embodiment of the invention provides an operation method of an air duct type air conditioner, which can judge whether to adjust the operation mode of the air duct type air conditioner or not according to the temperature difference delta T between the indoor temperature and the outdoor temperature regularly when the air duct type air conditioner operates in a refrigeration mode. If the operation mode is judged to be required to be adjusted, the refrigeration mode is adjusted to be the air supply mode, and the outdoor low-temperature air is utilized to cool the indoor air. Because the compressor is in a stop state in the air supply mode, the embodiment of the invention not only can achieve the aim of refrigerating, but also can avoid the problems of abrasion, aging, short service life and the like of the compressor caused by long-time operation of the compressor.
Thus far, the technical solution of the present invention has been described in connection with one embodiment shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will fall within the scope of the present invention.
Claims (7)
1. The operation control method of the air duct type air conditioner is characterized in that an indoor unit of the air duct type air conditioner comprises an outdoor return air grid, and the outdoor return air grid is connected to the outside through an air duct so that outdoor air can enter an air duct of the indoor unit through the outdoor return air grid;
the operation control method comprises the following steps:
when the air duct type air conditioner operates in a refrigerating mode, detecting indoor temperature and outdoor temperature at regular time;
judging whether to adjust the operation mode of the air duct type air conditioner according to the temperature difference delta T between the indoor temperature and the outdoor temperature; if yes, the outdoor return air grid is controlled to be opened, and the refrigerating mode is adjusted to be an air supply mode, so that the outdoor low-temperature air is used for cooling indoor air;
wherein the temperature difference Δt=t Indoor unit -T Outdoor unit The T is Indoor unit And T Outdoor unit Indoor temperature and outdoor temperature respectively;
the step of judging whether to adjust the operation mode of the air duct type air conditioner according to the temperature difference delta T between the indoor temperature and the outdoor temperature specifically comprises the following steps:
if DeltaT < DeltaT 1 Continuously controlling the opening of the indoor return air grid and the outdoor return airClosing the grid, and not adjusting the operation mode of the air duct type air conditioner;
if DeltaT > DeltaT 2 Controlling the indoor return air grid to be closed and the outdoor return air grid to be opened, and then adjusting the refrigeration mode to be an air supply mode;
if DeltaT 1 ＜ΔT＜ΔT 2 Respectively adjusting the opening of the indoor return air grid and the opening of the outdoor return air grid to preset opening values, and not adjusting the operation mode of the air duct type air conditioner;
wherein the preset opening value is smaller than the maximum opening of the indoor air return grid and the outdoor air return grid, and the delta T is 1 And DeltaT 2 Respectively a preset lower temperature difference limit and an upper temperature difference limit;
the indoor unit also comprises an indoor return air grid, and the indoor return air grid is connected into the room through an air pipe so that indoor air can enter an air flue of the indoor unit through the indoor return air grid;
after the outdoor return air grille is opened, the method further comprises:
judging whether the temperature difference delta T between the indoor temperature and the outdoor temperature detected within a certain period of time is smaller than a preset temperature difference threshold value;
if each temperature difference delta T is smaller than a preset temperature difference threshold value within the certain time period, controlling the indoor return air grid to be opened and the outdoor return air grid to be closed, and then judging whether a compressor in an outdoor unit of the air duct type air conditioner is in a stop state or not; if the compressor is in a stop state, continuously judging whether the stop time length of the compressor reaches a preset time length threshold value; if yes, the air supply mode is adjusted to be a refrigerating mode; if not, after the downtime reaches a preset time threshold, the air supply mode is adjusted to be a refrigeration mode.
2. The method of claim 1, wherein the step of detecting the indoor temperature and the outdoor temperature at regular time when the ducted air conditioner is operated in the cooling mode comprises:
after the air duct type air conditioner starts a refrigerating mode, the indoor return air grid is controlled to be opened and the outdoor return air grid is controlled to be closed, and then the indoor temperature and the outdoor temperature are detected at regular time.
3. The operation control method of the duct type air conditioner according to claim 2, wherein the method further comprises:
when delta T is less than 0, judging whether a fresh air instruction is received; if yes, the outdoor return air grid is controlled to be opened according to the fresh air instruction.
4. A method of controlling operation of a ducted type air conditioner according to any one of claims 1 to 3, further comprising:
when the air duct type air conditioner operates in a heating mode, the indoor return air grid is controlled to be opened and the outdoor return air grid is controlled to be closed;
judging whether a fresh air instruction is received or not; if yes, the outdoor return air grid is controlled to be opened according to the fresh air instruction.
5. A control device comprising a processor and a storage device, said storage device being adapted to store a plurality of program codes, characterized in that said program codes are adapted to be loaded and executed by said processor to perform the operation control method of the ducted air conditioner according to any one of claims 1 to 4.
6. The air duct type air conditioner is characterized by comprising an indoor unit and an outdoor unit; the indoor unit comprises the control device as claimed in claim 5, an indoor return air grid, an outdoor return air grid and a return air temperature sensor arranged in an air duct of the indoor unit; the outdoor unit comprises a compressor and an outdoor temperature sensor; the indoor return air grid is connected into the room through an air pipe, so that indoor air can enter the indoor unit air flue through the indoor return air grid; the outdoor return air grid is connected to the outside through an air pipe, so that outdoor air can enter the air flue of the indoor unit through the outdoor return air grid;
the control device is configured to detect indoor temperature and outdoor temperature through the return air temperature sensor and the outdoor temperature sensor respectively and control the operation of the air duct type air conditioner according to the detection result.
7. The ducted air conditioner according to claim 6, wherein said indoor unit further includes an evaporator, a return air grill driving means for driving said indoor return air grill and said outdoor return air grill to open/close, and a motor/fan for driving air flow in an air duct of said indoor unit;
the motor/fan is arranged at the front side of the evaporator in the direction from front to back along the air flow in the air duct of the indoor unit; or,
the motor/fan is disposed at the rear side of the evaporator in a front-to-rear direction along the air flow in the indoor unit duct.
Priority Applications (2)
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| CN202010124937.5A CN111426021B (en) | 2020-02-27 | 2020-02-27 | Air duct type air conditioner and operation control method and device thereof |
| PCT/CN2020/096343 WO2021169087A1 (en) | 2020-02-27 | 2020-06-16 | Duct-type air conditioner and operation control method therefor, and device |
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| CN202010124937.5A CN111426021B (en) | 2020-02-27 | 2020-02-27 | Air duct type air conditioner and operation control method and device thereof |
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| CN115183420A (en) * | 2021-04-02 | 2022-10-14 | 广东美的制冷设备有限公司 | Control method and device of air conditioner, air conditioner and storage medium |
| CN113548073A (en) * | 2021-07-27 | 2021-10-26 | 重庆中车长客轨道车辆有限公司 | Air conditioner air supply system and method for rail transit vehicle |
| CN114001408A (en) * | 2021-11-02 | 2022-02-01 | 三一筑工科技股份有限公司 | Fresh air and air conditioner all-in-one machine, control method, device, equipment and readable storage medium |
| CN113970162B (en) * | 2021-11-30 | 2023-05-02 | 宁波奥克斯电气股份有限公司 | Control method of mobile air conditioner and mobile air conditioner |
| CN114198860A (en) * | 2021-12-17 | 2022-03-18 | 宁波奥克斯电气股份有限公司 | Air conditioner control method and device and air conditioner |
| CN114484603A (en) * | 2021-12-27 | 2022-05-13 | 珠海格力节能环保制冷技术研究中心有限公司 | Fresh air duct structure and fresh air wall-mounted machine |
| CN114659304B (en) * | 2022-03-25 | 2024-03-19 | 青岛海尔空调器有限总公司 | Control method and control system for dehumidification of air conditioner, electronic equipment and storage medium |
| CN114811844B (en) * | 2022-04-19 | 2023-07-18 | 美的集团武汉暖通设备有限公司 | Operation control method and device of air conditioner and air conditioner |
| CN114791129A (en) * | 2022-04-19 | 2022-07-26 | 青岛海尔空调器有限总公司 | Method and device for controlling fresh air system, air conditioning equipment and storage medium |
| CN114623564A (en) * | 2022-04-22 | 2022-06-14 | 珠海格力节能环保制冷技术研究中心有限公司 | Air conditioner and refrigeration method |
| CN115031378B (en) * | 2022-07-05 | 2023-06-16 | 珠海格力电器股份有限公司 | Air conditioner control method and device, air conditioner and storage medium |
| CN118066656A (en) * | 2022-11-11 | 2024-05-24 | 广东美的制冷设备有限公司 | Mobile air conditioner, control method and control device thereof and computer storage medium |
| CN115978755B (en) * | 2022-12-13 | 2024-07-26 | 宁波奥克斯电气股份有限公司 | Air conditioner control method and device and air conditioner |
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