CN114165851A - Air conditioning unit - Google Patents

Air conditioning unit Download PDF

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Publication number
CN114165851A
CN114165851A CN202111445936.1A CN202111445936A CN114165851A CN 114165851 A CN114165851 A CN 114165851A CN 202111445936 A CN202111445936 A CN 202111445936A CN 114165851 A CN114165851 A CN 114165851A
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CN
China
Prior art keywords
air conditioning
spraying device
conditioning unit
started
assembly according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202111445936.1A
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Chinese (zh)
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CN114165851B (en
Inventor
杨春雪
李君飞
刘东来
辛电波
王晖
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Original Assignee
Qingdao Hisense Hitachi Air Conditioning System Co Ltd
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Priority to CN202111445936.1A priority Critical patent/CN114165851B/en
Publication of CN114165851A publication Critical patent/CN114165851A/en
Application granted granted Critical
Publication of CN114165851B publication Critical patent/CN114165851B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/14—Heat exchangers specially adapted for separate outdoor units
    • F24F1/16—Arrangement or mounting thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/20—Electric components for separate outdoor units
    • F24F1/24—Cooling of electric components
    • 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
    • F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
    • F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • 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
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/10—Pressure
    • F24F2140/12—Heat-exchange fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/50—Load
    • 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)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Human Computer Interaction (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses an air conditioning unit, which is characterized in that through designing a spraying device and a controller, when the exhaust pressure of a compressor is more than or equal to a preset high pressure value or the current of the air conditioning unit is more than or equal to a preset high current value, the spraying device is started to spray and cool an outdoor heat exchanger so as to improve the heat exchange capacity of the outdoor heat exchanger, further improve the refrigerating capacity of the air conditioning unit, meet the requirement of a user on the air conditioning capacity, reduce the power consumption of the air conditioning unit and reduce the cost of the air conditioning unit.

Description

Air conditioning unit
Technical Field
The invention relates to the technical field of electric appliances, in particular to an air conditioning unit.
Background
The temperature in summer in many areas of China can reach more than 38 ℃, and the actual temperature of the outdoor unit of the air conditioner is even higher than 48 ℃ sometimes. The poor outdoor environment makes the heat dissipating ability of the air-cooled unit more and more unable to meet the general requirements of air conditioner manufacturers. Meanwhile, along with the improvement of outdoor environment temperature, the energy efficiency of the air conditioner is worse and worse, and the power consumption of a user is more and more.
In the high-temperature refrigeration application, customers generally choose to increase the proportion of the air conditioner to improve the refrigeration capacity of the air conditioner.
However, increasing the cooling capacity by increasing the air conditioning ratio leads to an increase in air conditioning cost and an economic burden on the user.
Disclosure of Invention
The invention provides an air conditioning unit, which improves the refrigerating capacity by starting a spraying device and has lower cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides an air conditioning unit, which comprises an outdoor unit and an indoor unit, and further comprises:
the spraying device is used for spraying to an outdoor heat exchanger of the outdoor unit;
a controller configured to:
when any one of the starting conditions is met, starting the spraying device;
the turn-on conditions include:
(a) the exhaust pressure of the compressor is more than or equal to a preset high pressure value;
(b) the current of the air conditioning unit is larger than or equal to a preset high current value.
Further, the starting condition further includes:
(c) in the refrigeration or dehumidification mode, the outdoor environment temperature is greater than the set external loop temperature.
Still further, the turn-on condition further includes:
(d) and the air conditioning unit enters a mute mode.
Further, the start condition further includes:
(e) and the air conditioning unit enters a self-cleaning mode.
Further, when the spraying device is started because the exhaust pressure of the compressor is not less than the preset high pressure value, the exhaust pressure of the compressor is detected in real time in the operation process of the spraying device, and when the exhaust pressure of the compressor is not more than the preset low pressure value, the spraying device is closed;
wherein the preset low pressure value is less than the preset high pressure value.
Further, when the spraying device is started because the current of the air conditioning unit is not less than the preset high current value, the current of the air conditioning unit is detected in real time in the running process of the spraying device, and when the current of the air conditioning unit is not more than the preset low current value, the spraying device is closed;
wherein the preset low current value is less than the preset high current value.
Further, when the spraying device is started because the outdoor environment temperature is higher than the set outer ring temperature in the refrigeration or dehumidification mode, the outdoor environment temperature is detected in real time in the running process of the spraying device, and when the outdoor environment temperature is less than or equal to the set outer ring temperature, the spraying device is closed.
Furthermore, in a silent mode, when the spraying device is started, the rotating speed of the outer fan does not exceed the first silent windshield;
in a silent mode, when the spraying device is not started, the rotating speed of the outer fan does not exceed a second silent wind gear;
wherein the rotating speed of the first mute wind gear is less than that of the second mute wind gear.
Further, in the self-cleaning mode, the spraying device is started, and the outer fan runs at the maximum rotating speed;
and when the cleaning duration is reached, the spraying device is closed, and the self-cleaning mode is exited.
Furthermore, a water softening device is arranged on a water inlet pipe of the spraying device.
Compared with the prior art, the technical scheme of the invention has the following technical effects: according to the air conditioning unit, by designing the spraying device and the controller, when the exhaust pressure of the compressor is larger than or equal to the preset high pressure value or the current of the air conditioning unit is larger than or equal to the preset high current value, the spraying device is started to spray and cool the outdoor heat exchanger, so that the heat exchange capacity of the outdoor heat exchanger is improved, the refrigerating capacity of the air conditioning unit is further improved, the requirement of a user on the air conditioning capacity is met, the power consumption of the air conditioning unit is reduced, and the cost of the air conditioning unit is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of an air conditioning assembly of the present invention;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is a schematic diagram of an embodiment of an air conditioning assembly of the present invention;
FIG. 4 is a flow chart of an embodiment of a method of controlling an air conditioning unit according to the present invention;
FIG. 5 is a flow chart illustrating another embodiment of a method for controlling an air conditioning assembly in accordance with the present invention;
FIG. 6 is a diagram of a single stage compression refrigeration cycle;
FIG. 7 is a state transition diagram of the air conditioning unit current/exhaust pressure control spray device switch;
FIG. 8 is a flow chart illustrating a method of controlling an air conditioning assembly in accordance with another embodiment of the present invention;
fig. 9 is a flowchart of a control method of an air conditioning unit according to still another embodiment of the present invention.
Reference numerals:
10. an outdoor unit; 11. an outdoor heat exchanger; 12. an outer fan;
21. a shower head; 22. water inlet solenoid valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "center," "upper," "lower," "front," "back," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application.
In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; can be directly connected or connected
The intermediary agents are indirectly connected and may be internal to both elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The air conditioning unit performs a cooling and heating cycle of the air conditioning unit by using a compressor, a condenser, an expansion valve, and an evaporator. The cooling and heating cycle includes a series of processes involving compression, condensation, expansion, and evaporation to cool or heat an indoor space.
The low-temperature and low-pressure refrigerant enters the compressor, the compressor compresses the refrigerant gas in a high-temperature and high-pressure state, and the compressed refrigerant gas is discharged. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.
The expansion valve expands the high-temperature and high-pressure liquid-phase refrigerant condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a refrigerating effect by heat exchange with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioning unit may regulate the temperature of the indoor space throughout the cycle.
The outdoor unit of the air conditioning unit refers to a portion of a refrigeration cycle including a compressor, an outdoor heat exchanger, and an outdoor fan, the indoor unit of the air conditioning unit includes a portion of an indoor heat exchanger and an indoor fan, and a throttling device (such as a capillary tube or an electronic expansion valve) may be provided in the indoor unit or the outdoor unit.
The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. The air conditioning unit performs a heating mode when the indoor heat exchanger functions as a condenser, and performs a cooling mode when the indoor heat exchanger functions as an evaporator.
The indoor heat exchanger and the outdoor heat exchanger are switched to be used as a condenser or an evaporator, a four-way valve is generally adopted, and specific reference is made to the setting of a conventional air conditioning unit, which is not described herein any more.
The refrigeration working principle of the air conditioning unit is as follows: the compressor works to enable the interior of the indoor heat exchanger (in the indoor unit, the evaporator at the moment) to be in an ultralow pressure state, liquid refrigerant in the indoor heat exchanger is rapidly evaporated to absorb heat, air blown out by the indoor fan is cooled by the coil pipe of the indoor heat exchanger to become cold air which is blown into a room, the evaporated and vaporized refrigerant is compressed by the compressor, is condensed into liquid in a high-pressure environment in the outdoor heat exchanger (in the outdoor unit, the condenser at the moment) to release heat, and the heat is dissipated into the atmosphere through the outdoor fan, so that the refrigeration effect is achieved by circulation.
The heating working principle of the air conditioning unit is as follows: the gaseous refrigerant is pressurized by the compressor to become high-temperature and high-pressure gas, and the high-temperature and high-pressure gas enters the indoor heat exchanger (the condenser at the moment), is condensed, liquefied and released heat to become liquid, and simultaneously heats indoor air, so that the aim of increasing the indoor temperature is fulfilled. The liquid refrigerant is decompressed by the throttling device, enters the outdoor heat exchanger (an evaporator at the moment), is evaporated, gasified and absorbs heat to form gas, absorbs the heat of outdoor air (the outdoor air becomes cooler) to form gaseous refrigerant, and enters the compressor again to start the next cycle.
The air conditioning unit of the embodiment comprises an outdoor unit, an indoor unit, a controller, a spraying device and the like.
The outdoor unit 10 includes a compressor, an outdoor heat exchanger 11, and an external fan 12, as shown in fig. 1 to 3.
The indoor unit comprises an indoor heat exchanger and an inner fan.
And the spraying device is used for spraying to the outdoor heat exchanger 11 so as to achieve the purpose of cooling or cleaning the outdoor heat exchanger 11. The spraying device is provided with a water inlet pipe and a water spraying pipe, wherein the water inlet pipe is provided with a water inlet electromagnetic valve 22, the controller controls the on-off of the water inlet electromagnetic valve 22, the water spraying pipe is provided with a spraying head 21, and the water is sprayed to the outdoor heat exchanger 11 through the spraying head 21.
A controller configured to: when any one of the starting conditions is met, starting the spraying device; the starting conditions include:
(a) the exhaust pressure of the compressor is more than or equal to a preset high pressure value;
(b) the current of the air conditioning unit is larger than or equal to a preset high current value.
And (c) when the requirement (a) or (b) is met, starting the spraying device.
Specifically, the controller specifically executes the following steps, as shown in fig. 4.
Step S1: and judging whether the exhaust pressure of the compressor is larger than or equal to a preset high pressure value or the current of the air conditioning unit is larger than or equal to a preset high current value.
When the exhaust pressure of the compressor is larger than or equal to the preset high pressure value or the current of the air conditioning unit is larger than or equal to the preset high current value, executing the step S2: and starting the spraying device.
When the exhaust pressure of the compressor is larger than or equal to a preset high pressure value or the current of the air conditioning unit is larger than or equal to a preset high current value, the energy efficiency of the air conditioning unit is reduced, so that the spraying device is started, the heat exchange capacity of the outdoor heat exchanger is improved, the supercooling degree of the refrigerant is increased, and the refrigerating capacity of the air conditioning unit is improved.
Therefore, the air conditioning unit of this embodiment, through design spray set and controller, when the discharge pressure of compressor is no less than the preset high pressure value, perhaps air conditioning unit electric current is no less than the preset high current value, open spray set, carry out the cooling of spraying to outdoor heat exchanger to improve outdoor heat exchanger's heat transfer ability, and then improve air conditioning unit's refrigerating capacity, satisfy the demand of user to air conditioning ability, reduce air conditioning unit power consumption, reduce air conditioning unit's cost.
As a preferable design of this embodiment, the starting condition further includes:
(c) in the refrigeration or dehumidification mode, the outdoor environment temperature is greater than the set external loop temperature.
In the cooling mode or the dehumidification mode, when the outdoor environment temperature TAO is larger than the set external loop temperature A, the spraying device is started to reduce the temperature of the outdoor heat exchanger and improve the cooling capacity of the air conditioning unit.
In this example, the outer ring temperature A was set to 2 ℃.
As another preferable design of this embodiment, the starting condition further includes:
(d) and the air conditioning unit enters a mute mode.
The outer fan is one of the main sources of the noise of the outdoor unit, so that the rotating speed of the outer fan is reduced, and the noise of the outdoor unit can be obviously reduced. When the air conditioning unit enters a mute mode, starting a spraying device; after the spraying device is opened, the heat exchange capacity of the outdoor heat exchanger is improved, and the performance of the unit is improved, so that the rotating speed of the external fan can be properly reduced, and the noise of the outdoor unit is reduced.
As still another preferable design method of the present embodiment, the start condition further includes:
(e) and the air conditioning unit enters a self-cleaning mode.
And entering a self-cleaning mode when a self-cleaning condition is met, such as receiving a self-cleaning signal or reaching a self-cleaning period. When the air conditioning unit enters the self-cleaning mode, the spraying device is started to spray water to the outdoor heat exchanger so as to clean the outdoor heat exchanger, and the heat exchange capacity of the outdoor heat exchanger can be improved.
In summary, the opening conditions of the spraying device include:
(a) the exhaust pressure of the compressor is more than or equal to a preset high pressure value;
(b) the current of the air conditioning unit is greater than or equal to a preset high current value;
(c) in the refrigeration or dehumidification mode, the outdoor environment temperature is higher than the set external environment temperature;
(d) the air conditioning unit enters a mute mode;
(e) and the air conditioning unit enters a self-cleaning mode.
And when any one of the starting conditions is met, starting the spraying device.
The controller judges whether any one of the conditions (a) to (e) is satisfied, and if any one of the conditions is satisfied, the spraying device is started.
The following specifically describes the operation procedure of the air conditioning unit when any one of the turn-on conditions is satisfied.
Firstly, when the spraying device is started because the exhaust pressure of the compressor is larger than or equal to a preset high pressure value, the exhaust pressure of the compressor is detected in real time in the running process of the spraying device, and when the exhaust pressure of the compressor is detected to be smaller than or equal to a preset low pressure value, the spraying device is closed. Wherein the preset low pressure value is less than the preset high pressure value.
And when the exhaust pressure epsilon of the compressor is larger than a preset low pressure value and a preset high pressure value, the spraying device keeps the current on-off state.
Through the control, the spraying device is started when the exhaust pressure of the compressor is not less than the preset high pressure value, so that the heat exchange capacity of the outdoor heat exchanger is improved, and the air conditioning unit is in a running state with higher performance; when the exhaust pressure of the compressor is less than or equal to the preset low pressure value, the performance of the air conditioner is ensured, the spraying device is closed, and the reliability of the spraying device is improved.
And secondly, when the spraying device is started because the current of the air conditioning unit is not less than the preset high current value, the current of the air conditioning unit is detected in real time in the running process of the spraying device, and when the current of the air conditioning unit is not more than the preset low current value, the spraying device is closed. Wherein the preset low current value is less than the preset high current value.
When the current epsilon of the air conditioner set is larger than the preset low current value and the preset high current value, the spraying device keeps the current on-off state.
Through the control, the spraying device is started when the current of the air conditioning unit is not less than the preset high current value, so that the heat exchange capacity of the outdoor heat exchanger is improved, and the air conditioning unit is in a running state with higher performance; when the current of the air conditioning unit is less than or equal to the preset low current value, the performance of the air conditioner is guaranteed, the spraying device is closed, and the reliability of the spraying device is improved.
And thirdly, when the spraying device is started because the outdoor environment temperature TAO is greater than the set outer ring temperature A in the refrigeration or dehumidification mode, detecting the outdoor environment temperature in real time in the running process of the spraying device, and when the outdoor environment temperature TAO is detected to be less than or equal to the set outer ring temperature A, closing the spraying device.
Through the control, when the outdoor environment temperature is higher than the set outer ring temperature in the refrigeration or dehumidification mode, the spraying device is started to cool the outdoor heat exchanger so as to improve the heat exchange capacity of the outdoor heat exchanger and the refrigeration capacity of the air conditioning unit; when the outdoor environment temperature is less than or equal to the set outer ring temperature and the performance of the air conditioner is ensured, the spraying device is closed, and the reliability of the spraying device is improved.
As can be seen from the refrigeration cycle diagram of fig. 6, when the supercooling degree of the condenser of the air conditioner is increased during refrigeration or dehumidification, both H5 "and H6" are decreased, and the difference between (H1-H6 ") is increased, so that the refrigerating capacity of the air conditioner is improved. After the spraying device is added in the air conditioning unit, the heat exchange capacity of the outdoor heat exchanger is improved, the supercooling degree of the refrigerant is increased, and the purpose of improving the capacity of the air conditioning unit can be achieved.
As another preferable design of this embodiment, the start and stop of the spraying device may be controlled by combining the outdoor ambient temperature, the discharge pressure of the compressor, and the current of the air conditioning unit, as shown in fig. 5. When the air conditioner refrigeration or dehumidification operation is started, the magnitude relation between the outdoor environment temperature TAO and the set external loop temperature A is judged, when the TAO is larger than A, the spraying device is started, then the exhaust pressure or current of the air conditioning unit is read, the opening and closing of the spraying device are controlled according to the state transition diagram of fig. 7, in the fig. 7, B is smaller than C, D is smaller than E, the switching state of the spraying device is shifted through the change of the current or the exhaust pressure, and the confirmation of the specific value of B/C/D/E is related to the characteristics of the unit. And meanwhile, when the TAO is less than or equal to A, closing the spraying device.
In the state transition diagram of the spraying device of fig. 7, B is a preset low current value, and C is a preset high current value; d is a preset low pressure value, and E is a preset high pressure value.
When the current of the air conditioning unit is larger than or equal to C, starting a spraying device; when the current of the air conditioner unit is less than or equal to B, the spraying device is closed; and when the current epsilon of the air conditioner set is larger than the current epsilon of the air conditioner set, maintaining the current state of the spraying device.
When the exhaust pressure of the compressor is more than or equal to E, starting the spraying device; when the exhaust pressure of the compressor is less than or equal to D, closing the spraying device; when the compressor discharge pressure E (D, E), the current state of the spray device is maintained.
When the judgment results of the switch of the spraying device are inconsistent according to the outdoor environment temperature, the compressor discharge pressure and the unit current, the switch of the spraying device is judged according to the magnitude relation between the outdoor environment temperature and the set outer ring temperature.
When the judgment results of the switch of the spray device according to the exhaust pressure of the compressor and the current of the unit are inconsistent, the switch of the spray device is judged according to the magnitude relation between the exhaust pressure of the compressor and the preset low pressure value and the preset high pressure value.
Fourthly, in a mute mode, when the spraying device is started, the rotating speed of the outer fan does not exceed the first mute wind level; in a silent mode, when the spraying device is not started, the rotating speed of the outer fan does not exceed a second silent wind gear;
wherein the rotating speed of the first mute wind gear is less than that of the second mute wind gear.
After the spraying device is started, the heat exchange effect of the outdoor heat exchanger is enhanced, the performance of the air conditioning unit is improved, and the rotating speed of the outer fan can be properly reduced when the same performance of a silent mode is kept. Therefore, under the silent mode, when the spraying device is started, the gear of the outer fan is reduced, and the noise is reduced.
Through noise test and unit capability test result, select the silence gear of outer fan: after the outdoor unit is selectively provided with the spraying device, the highest fan gear is limited to a first mute gear M; if the outdoor unit is not provided with a spraying device, the highest fan gear is limited to a second mute gear N; m is less than N. When keeping the same performance of mute state, can suitably reduce the gear of outer fan, during the mute state, the noise is lower.
Referring to fig. 8, when the user selects the mute mode, the air conditioning unit enters the mute mode, and first, whether the air conditioning unit has a spraying device is determined.
And if the spraying device is not arranged, the highest rotating speed gear of the outer fan is limited to a second mute gear N.
If the spraying device is available, the spraying device is started, the highest rotating speed gear of the outer fan is limited to a first mute gear M, M is less than N, and the noise of the outdoor unit is reduced in a mode of reducing the rotating speed of the outer fan.
And when the user selects to quit the mute mode, the gear of the external fan restores the automatic control mode.
Therefore, when the spray device is started in the silent mode, the noise of the silent mode is lower, and the user feels more comfortable.
And fifthly, after the air conditioner unit operates for a period of time, the surface of the outdoor heat exchanger is affected by the outdoor environment, a lot of dust is generated on the surface of the outdoor heat exchanger, the outdoor heat exchanger is cleaned through a self-cleaning period or the autonomous control of a user according to the operating environment, and the spraying device is started to clean the outdoor heat exchanger, so that the heat exchange performance of the outdoor heat exchanger is ensured.
In the self-cleaning mode, the spraying device is started, and the outer fan runs at the maximum rotating speed; and when the cleaning duration is reached, the spraying device is closed, and the self-cleaning mode is exited.
In the self-cleaning mode, the outer fan runs at the maximum rotating speed when the spraying device is started, so that the cleaning speed is increased, and the outdoor heat exchanger is dried as soon as possible.
Referring to fig. 9, when a cleaning cycle is reached or a self-cleaning signal is received, the spray device is started, the outer fan is operated at a maximum speed, and when a cleaning time requirement is reached, the spray device is turned off.
In this embodiment, the spraying device has a water inlet pipe and a water spraying pipe, the water inlet pipe is provided with a water softening device and a water inlet electromagnetic valve 22, and the water spraying pipe is provided with a spraying head 21.
In common tap water, calcium and magnesium ions are more, the heat exchanger is calcified after the tap water is sprayed to the heat exchanger, white calcified substances exist on the surface of the tap water, the calcified substances are difficult to remove, the heat exchange performance of the outdoor heat exchanger is affected, and the use effect of the air conditioner is reduced. A spraying device is selected and matched on the air conditioning unit, a water source is softened by the water softening device and then enters the spraying device, and then the water source is sprayed onto the outdoor heat exchanger through the spraying device, so that the performance of the air conditioning unit is improved.
Therefore, the water softening device is arranged to soften water entering the spraying device so as to prevent the outdoor heat exchanger from calcification and ensure the heat exchange performance of the outdoor heat exchanger.
The principle of the water softening device is that Ca2+ and Mg2+ in water and Na + in an exchanger perform exchange reaction when water flows through the exchanger layer from top to bottom. The regeneration process is mainly to make sodium chloride (NaCl) solution containing a large amount of sodium ions pass through the failed resin layer, so that calcium ions and magnesium ions in the ion exchange resin are exchanged into the solution, and the sodium ions are adsorbed by the resin, so that the exchange capacity of the resin is restored again.
The air conditioning unit of this embodiment has solved the linkage of spray set and air conditioner and has used less problem when the operation, can make the air conditioner keep the running state of a higher energy efficiency always through opening with spray set and the exhaust pressure or the electric current of air conditioner relevant, can link with outer fan simultaneously, lets the running state of air conditioning unit low noise, improves user's travelling comfort.
According to the air conditioning unit, the spraying device is arranged, so that the refrigeration overload capacity and energy efficiency of the air conditioning unit are improved, the capacity requirement of a user on an air conditioner is met, the national energy saving and emission reduction requirement is responded, and the power consumption of the air conditioner is reduced; meanwhile, the air conditioner proportion can be properly reduced, certain economic benefit is achieved, and the air conditioner cost is reduced; the outdoor heat exchanger can be self-cleaned, so that the heat exchange efficiency of the outdoor heat exchanger is improved, and the performance is improved; meanwhile, the operation in a mute mode can be started, so that the performance of the unit is ensured, the noise of the outdoor unit is reduced, and the comfort of users is improved.
In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples. The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. An air conditioning unit, includes off-premises station and indoor set, its characterized in that still includes:
the spraying device is used for spraying to an outdoor heat exchanger of the outdoor unit;
a controller configured to:
when any one of the starting conditions is met, starting the spraying device;
the turn-on conditions include:
(a) the exhaust pressure of the compressor is more than or equal to a preset high pressure value;
(b) the current of the air conditioning unit is larger than or equal to a preset high current value.
2. Air conditioning assembly according to claim 1, characterized in that: the turn-on condition further includes:
(c) in the refrigeration or dehumidification mode, the outdoor environment temperature is greater than the set external loop temperature.
3. Air conditioning assembly according to claim 1, characterized in that: the turn-on condition further includes:
(d) and the air conditioning unit enters a mute mode.
4. Air conditioning assembly according to claim 1, characterized in that: the turn-on condition further includes:
(e) and the air conditioning unit enters a self-cleaning mode.
5. Air conditioning assembly according to claim 1, characterized in that: when the spraying device is started because the exhaust pressure of the compressor is not less than the preset high pressure value, the exhaust pressure of the compressor is detected in real time in the running process of the spraying device, and when the exhaust pressure of the compressor is not more than the preset low pressure value, the spraying device is closed;
wherein the preset low pressure value is less than the preset high pressure value.
6. Air conditioning assembly according to claim 1, characterized in that: when the spraying device is started because the current of the air conditioning unit is not less than the preset high current value, the current of the air conditioning unit is detected in real time in the running process of the spraying device, and when the current of the air conditioning unit is not more than the preset low current value, the spraying device is closed;
wherein the preset low current value is less than the preset high current value.
7. Air conditioning assembly according to claim 2, characterized in that: when the spraying device is started because the outdoor environment temperature is higher than the set outer ring temperature in the refrigeration or dehumidification mode, the outdoor environment temperature is detected in real time in the running process of the spraying device, and when the outdoor environment temperature is less than or equal to the set outer ring temperature, the spraying device is closed.
8. An air conditioning assembly according to claim 3, wherein:
in a mute mode, when the spraying device is started, the rotating speed of the outer fan does not exceed a first mute wind level;
in a silent mode, when the spraying device is not started, the rotating speed of the outer fan does not exceed a second silent wind gear;
wherein the rotating speed of the first mute wind gear is less than that of the second mute wind gear.
9. Air conditioning assembly according to claim 4, characterized in that:
in the self-cleaning mode, the spraying device is started, and the outer fan runs at the maximum rotating speed;
and when the cleaning duration is reached, the spraying device is closed, and the self-cleaning mode is exited.
10. Air conditioning assembly according to any of claims 1 to 9, characterized in that: and a water softening device is arranged on a water inlet pipe of the spraying device.
CN202111445936.1A 2021-11-30 2021-11-30 Air conditioning unit Active CN114165851B (en)

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US20200370776A1 (en) * 2019-05-24 2020-11-26 Natural Air E-Controls, Llc Dynamic misting control for outdoor condensers
CN113007816A (en) * 2019-12-20 2021-06-22 青岛海信日立空调系统有限公司 Air conditioner
CN113339898A (en) * 2020-03-02 2021-09-03 上海宝塔节能科技有限公司 Air conditioner atomizing energy-saving system
CN114593474A (en) * 2022-03-11 2022-06-07 广东美的暖通设备有限公司 Spraying control method and device, electronic equipment and storage medium

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011069589A (en) * 2009-09-28 2011-04-07 Sanyo Electric Co Ltd Cooling device for outdoor unit
CN203880839U (en) * 2014-03-21 2014-10-15 江苏友奥电器有限公司 Split air conditioner
CN206281103U (en) * 2016-11-24 2017-06-27 国网新疆电力公司信息通信公司 Computer room automatic spray heat sink
US20200370776A1 (en) * 2019-05-24 2020-11-26 Natural Air E-Controls, Llc Dynamic misting control for outdoor condensers
CN209978257U (en) * 2019-05-28 2020-01-21 中机物联（北京）节能环保科技有限公司 Intelligent atomization spraying device
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CN114593474A (en) * 2022-03-11 2022-06-07 广东美的暖通设备有限公司 Spraying control method and device, electronic equipment and storage medium

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