CN109556249B - One-driven-multiple air conditioner and air outlet temperature adjusting method of indoor end device of air conditioner - Google Patents
One-driven-multiple air conditioner and air outlet temperature adjusting method of indoor end device of air conditioner Download PDFInfo
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- CN109556249B CN109556249B CN201811543840.7A CN201811543840A CN109556249B CN 109556249 B CN109556249 B CN 109556249B CN 201811543840 A CN201811543840 A CN 201811543840A CN 109556249 B CN109556249 B CN 109556249B
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000004378 air conditioning Methods 0.000 claims abstract description 19
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000017525 heat dissipation Effects 0.000 description 6
- 230000004087 circulation Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- 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
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
- F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
-
- 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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- 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 a multi-split integral air conditioning unit and an air outlet temperature adjusting method thereof. The multi-split integral air conditioner comprises an air conditioning unit, a first air duct system and at least two indoor end devices, and is characterized in that the indoor end devices comprise a fresh air device, the fresh air device is communicated with an air supply pipeline of the first air duct system, and fresh air and air in the air supply pipeline are mixed and then are delivered to the indoor space through an air outlet of the indoor end device. According to the invention, by introducing the fresh air, the internal temperatures of a plurality of rooms are simultaneously regulated on the basis of one air conditioning unit, so that users in different rooms can enjoy different temperature experiences without increasing the units.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a multi-split air conditioner and an air outlet temperature adjusting method of an indoor end device of the multi-split air conditioner.
Background
As is well known, the one-driven-multiple air conditioner is a unit integral unit of an all-air system, is generally installed on a roof, and is suitable for independent large unit spaces of villas, supermarkets, banks, hotels, office areas, industrial occasions, hospitals, waiting halls and the like. The unit is generally an integrated unit of an inner unit and an outer unit, and is connected with an indoor unit through an air duct, and an indoor tail end device supplies air to the indoor. For large cooling capacity, such as a roof-top machine with a cooling capacity of 19KW or more, three or more rooms can be supplied. Thus, the temperature required may be different for users in different rooms, but the temperature of the indoor end unit cannot be adjusted due to the rooftop structure. The traditional tail end air valve structure can only adjust the air output and cannot adjust the air output temperature carefully, and is insensitive to indoor real-time temperature feedback, so that the air valve structure is difficult to adapt to the requirements of different users.
In summary, the conventional one-drive-multiple unit integral air conditioner has the following technical problems:
1. the air outlet at the tail end is guided into a plurality of rooms through an air duct, and the air outlet temperature cannot be controlled according to the requirements of users;
2. the long-term use of the air conditioner causes the indoor air to be stale.
Disclosure of Invention
The invention provides a multi-split air conditioner and an air temperature adjusting method of an indoor end device of the air conditioner, which are used for meeting the requirements of users in different rooms on air outlet temperature and air quality.
The invention provides a multi-split air conditioner which comprises an air conditioning unit, a first air duct system and indoor end devices positioned in different rooms, wherein each indoor end device comprises a fresh air device, each fresh air device is communicated with an air supply pipeline of the first air duct system, and fresh air is mixed with air in the air supply pipelines and then is delivered to the indoor space through an air outlet of each indoor end device.
In one embodiment, the fresh air device is a mixing chamber, the mixing chamber is provided with three openings, a first opening is communicated with the air supply pipeline, a second opening is a fresh air inlet, a third opening is communicated with an air outlet of the indoor end device, and the fresh air inlet is provided with a fan.
Preferably, a filter is arranged inside the air outlet of the indoor end device.
Preferably, a temperature sensing device is arranged at an air outlet of the indoor end device, and a controller of the air conditioning unit adjusts the air volume of the fresh air device and/or the output power of the compressor according to the outlet air temperature detected by the temperature sensing device.
Preferably, the first air duct system comprises a main air supply duct communicated with an air outlet of an evaporator of the air conditioner, a branch air supply duct, a first air return device communicated with indoor air, a branch first air return duct and a main first air return duct communicated with an air inlet of the evaporator of the air conditioning unit.
Preferably, the one-drive-multiple air conditioner further comprises a second air duct system, wherein the second air duct system is composed of a second air return device communicated with indoor air, a second air return branch pipeline and a second air return main pipeline, and the second air return main pipeline sends part of the indoor air into the air conditioning unit for heat dissipation.
Preferably, the air conditioning unit, the first air duct system and the second air duct system are installed on a roof.
The invention also provides an air outlet temperature adjusting method of the indoor end device using the multi-split air conditioner, which comprises the following steps:
step 1, judging the number of rooms using air conditioners during starting, and setting the initial air outlet temperature of an indoor end device of the room according to the number of the rooms;
and 2, when the air conditioning unit operates for a period of time T1 according to the initial air outlet temperature, starting the fresh air device, mixing the fresh air with the air in the air supply pipeline, and then sending the mixed air into the room.
Preferably, the time T1 is 3 minutes.
Preferably, when the number of rooms using the air conditioner is one, the initial outlet air temperature is TAir outlet＝TIs provided with-a; when the number of rooms using the air conditioner is more than one, the initial outlet air temperature TAir outletTmin-a, where Tmin is the minimum set temperature in multiple rooms and a is the set value.
Preferably, the value of a is 2.
Preferably, in step 2, when the number of rooms using the air conditioner is one, the fresh air ratio X is 2/(. DELTA.T-2); when the number of rooms using the air conditioner is more than one, the fresh air ratio X is equal to delta TIs provided with/(△T-△TIs provided with) Wherein, DeltaT is the difference between the outdoor temperature and the indoor air outlet temperature, and DeltaT is the difference between the set temperature and the indoor air outlet temperature.
The method for adjusting the outlet air temperature of the indoor terminal device further comprises the following steps:
step 3, judging whether the actual air supply temperature is equal to the set temperature, if so, keeping stable operation; if not, further judging TIs provided withIf not, adjusting the motor speed of the fresh air device; if yes, then judgeBroken TIs provided withAnd (4) adjusting whether the temperature is greater than the value B, if so, adjusting the output power of the compressor, and then adjusting the motor rotating speed of the fresh air device.
Preferably, the B value is 2 degrees.
Compared with the prior art, the invention has the following beneficial effects:
1. different quantities of outdoor fresh air and cold air or hot air in the air duct are introduced through the tail end of each room, so that different rooms can have different air outlet temperatures at the same time, and the requirements of different users on the temperatures are met;
2. the fresh air device is introduced through the tail end, so that indoor air always keeps good air quality, and each room has good user experience;
3. through two systems of indoor end device and air conditioning unit simultaneous temperature regulation, it is more rapid to the indoor end feedback temperature processing, and the accuse temperature is more accurate.
Drawings
Fig. 1 is a system diagram of a multi-split air conditioner according to the present invention;
FIG. 2 is a schematic view of an indoor end unit;
fig. 3 is a flowchart of the method for adjusting the outlet air temperature of the indoor end device according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and examples. It should be understood that the following specific examples are only for illustrating the present invention and are not to be construed as limiting the present invention.
The multi-split air conditioner designed by the invention is explained in detail by taking a roof-top machine as an example. The roof unit is generally an integrated unit of an inner machine and an outer machine, is communicated with an indoor tail end device through an air duct and supplies air to the indoor. The number of rooms may be one or more.
As shown in fig. 1, the multi-split air conditioning rooftop unit includes an air conditioning assembly 1, including an outdoor unit portion 11 and an indoor unit portion 12, a first duct system 2, and indoor end units 3 of at least two different rooms. The first air duct system comprises an air supply main duct 21 communicated with an air outlet of an evaporator of the air conditioner, an air supply branch duct 22, a first air return device 23 communicated with indoor air, a first air return branch duct 24 and a first air return main duct 25 communicated with an air inlet of the evaporator of the air conditioning unit, and a fan is arranged in the air duct.
As shown in fig. 2, the indoor end device 3 includes an air inlet 31 and an air outlet 32 communicated with the air supply branch pipe 22 and controlled by an air valve 37 and an air valve motor 38, and a filter device 33 is disposed inside the air outlet. The indoor end unit also includes a fresh air device, which in this embodiment is a mixing chamber 34. The mixing chamber is provided with three openings, a first opening is communicated with an air inlet 31, the air inlet is communicated with an air supply pipeline, a second opening is communicated with a fresh air inlet 35, and a third opening is communicated with an air outlet 32 of an indoor end device. The fresh air inlet is provided with a fan 36. The fresh air and the air in the air supply pipeline are mixed in the mixing cavity 34 and then are delivered to the room through the air outlet 32 of the indoor end device.
The air outlet position of the indoor end device is also provided with a temperature sensing device, and the controller of the air conditioning unit can adjust the air volume of the fresh air device and/or the output power of the compressor according to the outlet air temperature detected by the temperature sensing device.
Preferably, the multi-split air conditioning system designed by the invention further comprises a second air duct system 4, which is composed of a second return air device 41 communicated with indoor air, a second return air branch pipeline 42 and a second return air main pipeline 43, wherein a fan is arranged in the return air pipeline. And part of indoor air is sent into the air conditioning unit by the second return air main pipeline and is used for heat dissipation of the unit compressor and the condenser. Because the indoor cool air temperature is far lower than the outdoor temperature, the heat dissipation of the condenser of the outdoor unit can be better assisted, and the heat dissipation efficiency is improved.
The air conditioning unit, the first air duct system and the second air duct system are all installed on the roof.
Fig. 3 is a flowchart of the outlet air temperature adjusting method of the present invention, which specifically includes the following steps:
step 1, judging the number of rooms using air conditioners during starting, and setting the initial air outlet temperature of an indoor end device of the room according to the number of the rooms;
for example, when the unit is started, cool air is delivered to the room through the main air duct at the initial set temperature of 19 ℃, and air is delivered to each room with users through the branch air duct in the vicinity of each room. The room without people keeps the air valve closed according to the mode set by the system.
When only one of the rooms has a user, the set temperature of the room is reduced by 2 ℃ to be used as the initial air outlet temperature T to the indoor terminal deviceGo outFirst according to TGo outThe temperature is run for a period of time T1, for example 3 minutes, to bring the room temperature to the setpoint at a faster rate.
When a plurality of rooms are provided with users, the minimum value Tmin minus 2 ℃ of the set temperatures of all the rooms is used as the initial outlet air temperature T of the tail air in the roomGo outAlso according to T firstGo outThe temperature was run for 3 minutes to allow the room temperature to approach the set point at a faster rate.
Step 2, when the air conditioner unit operates for a period of time T1 according to the initial air outlet temperature, starting a fresh air device, mixing fresh air with air in an air supply pipeline, and then sending the mixed air into a room;
and when the air supply operation is finished for 3 minutes, starting a fresh air device of the indoor end device, introducing fresh air, and inputting outdoor fresh air into the room according to a fresh air proportion X. When the room using the air conditioner is one room, the ratio of the introduced fresh air amount is X-2/(. DELTA.T-2), and when the room using the air conditioner is more than one, the ratio of the introduced fresh air amount isWherein, DeltaT is the difference between the outdoor temperature and the indoor air outlet temperature, and DeltaT is the difference between the set temperature and the indoor air outlet temperature. The fresh air and the cold air from the air supply pipeline are fully mixed and heat exchanged in the mixing cavity, then are filtered by the filtering device, and are conveyed indoors through the air outlet of the indoor end device.
Step 3, judging whether the actual air supply temperature is equal to the set temperature, if so, keeping stable operation; if not, further judging TIs provided withIf not, adjusting the motor speed of the fresh air device; if yes, judging TIs provided withAdjusting whether the temperature is greater than the B value, if so, firstly adjustingThe output power of the compressor is adjusted, and then the motor speed of the fresh air device is adjusted.
Arranging a temperature sensing device at an air outlet of an indoor terminal device, detecting the air outlet temperature in real time, and under the condition that the set temperature is not changed, adjusting the motor rotating speed of a fan of a fresh air device when the air outlet temperature is different from the set temperature (when the measured temperature is higher than the set temperature, reducing the rotating speed of a fresh air motor, reducing the introduced fresh air quantity, and otherwise, improving the introduced fresh air quantity); when the set temperature is adjusted, the output power of the unit is adjusted when the adjusted temperature exceeds 2 ℃, and when the temperature change is within 2 ℃, the motor rotating speed of a fan of the fresh air system is adjusted so as to adjust the amount of introduced fresh air. When the output temperature is consistent with the set temperature, the operation of the state is continuously kept.
The formula for the fresh air introduction coefficient is derived as follows:
the thermal formula Q is cm Δ t, where the mass m is ρ gv,
outdoor temperature TOutdoors＝TGo out+ Δ T, Δ T is the difference between the outdoor temperature and the temperature of the inlet air outlet,
due to TSetting up＝TGo out+ΔTIs provided with，ΔTIs provided withIs the difference between the temperature set by the user and the temperature of the air outlet introduced into the room,
(Tgo out+ΔTIs provided with)(V1+V2)＝TGo outV1+(TGo out+ΔT)V2
V1 is the air quantity blown into the room by the roof machine through the air supply pipeline, and V2 is the air quantity introduced into the room by the fresh air device. Let V1A value of 1 corresponds toDelta T is more than Delta T during refrigerationIs provided withWhen heating, the delta T is less than the delta TIs provided with。
Ratio of fresh air quantity introduced to air quantity of roof machine when only one room is operated
When multiple rooms are running, the fresh air ratio is input
Above, TOutdoorsIs the outdoor temperature, TGo outTemperature, T, of the end device from the rooftop to the roomSetting upIs the indoor set temperature.
Combining the above theoretical calculation and later experiments, the ratio of the introduced fresh air into each room is as follows:
the system of the invention has two sets of air volume circulations, one set is a first air duct system, namely a conventional air circulation system in the roof-top machine, air is blown into a room from an air outlet of an evaporator of the roof-top machine through an air supply pipeline and an air outlet of an indoor terminal device, and then circulated back to an air suction port of the evaporator of the roof-top machine from an air return port and an air return pipeline. The other set of circulation is the second air duct system, and wind is sent into indoorly from outdoor new trend system, and then from the export of indoor second return air device, spreads into the outer machine of roof machine through the wind channel, because indoor cool wind temperature is far less than outdoor temperature, the help off-premises station condenser heat dissipation that can be better, raises the radiating efficiency, and has utilized the outdoor cold air of discharge before to be used for the heat dissipation, has practiced thrift heat recovery fabulous, the effectual wasting of resources that has less.
The air conditioner with one outdoor unit and the air outlet temperature adjusting method of the indoor end device of the air conditioner with the multiple indoor units can adjust the internal temperatures of multiple rooms simultaneously on the basis of one air conditioning unit in a fresh air introducing mode, so that users in different rooms can enjoy different temperature experiences without increasing the units.
The foregoing is considered as illustrative only of the embodiments of the invention. It should be understood that any modifications, equivalents and changes made within the spirit and framework of the inventive concept are intended to be included within the scope of the present invention.
Claims (6)
1. The method for adjusting the air outlet temperature of the indoor end device of the multi-split air conditioner is characterized by comprising the following steps:
step 1, judging the number of rooms using air conditioners during starting, and setting the initial air outlet temperature of an indoor end device of the room according to the number of the rooms;
step 2, when the air conditioning unit operates for a period of time T1 according to the initial air outlet temperature, starting a fresh air device, mixing fresh air with air in an air supply pipeline, and then sending the mixed air into a room through an air outlet of an indoor end device; when the number of rooms using the air conditioner is one, introducing a fresh air ratio X of 2/(. DELTA.T-2); when the number of rooms using the air conditioner is more than one, the fresh air ratio is introducedWherein DeltaT is the difference between the outdoor temperature and the indoor outlet temperature,the difference between the set temperature and the indoor outlet temperature.
2. The method for adjusting an outlet air temperature of an indoor end device of claim 1, wherein the time T1 is 3 minutes.
3. The method for adjusting outlet air temperature of indoor end device of claim 1, wherein when the number of rooms using the air conditioner is one, the initial outlet air temperature isWhen the number of rooms using the air conditioner is more than one, the initial air outlet temperatureTmin-a, where Tmin is the minimum set temperature in multiple rooms and a is the set value.
4. The method according to claim 3, wherein the value A is 2 degrees.
5. The method for adjusting the outlet air temperature of an indoor end device according to claim 1, further comprising:
step 3, judging whether the actual air supply temperature is equal to the set temperature, if so, keeping stable operation; if not, further judging whether the T setting is changed, if not, adjusting the motor rotating speed of the fan of the fresh air device; if yes, judging whether the T-set adjusting temperature is larger than the B value, if yes, adjusting the output power of the compressor, and then adjusting the motor rotating speed of the fan of the fresh air device.
6. The method according to claim 5, wherein the value B is 2 degrees.
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| CN110398012A (en) * | 2019-08-27 | 2019-11-01 | 上海盈达空调设备股份有限公司 | Combined type central air conditioner system and method |
| CN110940118A (en) * | 2019-12-04 | 2020-03-31 | 中国直升机设计研究所 | Helicopter evaporation circulation refrigerating device and method |
| CN111156666B (en) * | 2019-12-25 | 2020-11-24 | 珠海格力电器股份有限公司 | Fresh air control method and fresh air conditioner |
| CN112303847A (en) * | 2020-10-23 | 2021-02-02 | 珠海格力电器股份有限公司 | Air supply control device and method of air conditioner, air conditioner and remote controller |
| CN113465135B (en) * | 2021-04-25 | 2023-02-17 | 青岛海尔空调器有限总公司 | Method and device for controlling air conditioner and intelligent air conditioner |
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| CN101354164A (en) * | 2008-07-25 | 2009-01-28 | 赵阿萌 | Assembling type dried work condition operating cleaning operation room and wind process method thereof |
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| US20170219231A1 (en) * | 2016-02-01 | 2017-08-03 | Hon Hai Precision Industry Co., Ltd. | Energy efficient air conditioning system |
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| US5305953A (en) * | 1993-06-30 | 1994-04-26 | Carrier Corporation | Reactive heating control system |
| CN101354164A (en) * | 2008-07-25 | 2009-01-28 | 赵阿萌 | Assembling type dried work condition operating cleaning operation room and wind process method thereof |
| CN204006430U (en) * | 2014-07-28 | 2014-12-10 | 上海麟祥机电工程有限公司 | VMC supplements air-conditioning system |
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