CN110762647A - Central air-conditioning system and control method thereof - Google Patents
Central air-conditioning system and control method thereof Download PDFInfo
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- CN110762647A CN110762647A CN201910983777.7A CN201910983777A CN110762647A CN 110762647 A CN110762647 A CN 110762647A CN 201910983777 A CN201910983777 A CN 201910983777A CN 110762647 A CN110762647 A CN 110762647A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims description 26
- 239000003507 refrigerant Substances 0.000 claims abstract description 172
- 238000010438 heat treatment Methods 0.000 claims abstract description 95
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 72
- 239000007788 liquid Substances 0.000 claims description 189
- 238000005057 refrigeration Methods 0.000 claims description 34
- 230000006835 compression Effects 0.000 claims description 16
- 238000007906 compression Methods 0.000 claims description 16
- 238000000926 separation method Methods 0.000 claims description 16
- 238000009434 installation Methods 0.000 description 17
- 238000007599 discharging Methods 0.000 description 14
- 230000008901 benefit Effects 0.000 description 6
- 238000004891 communication Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000006467 substitution reaction Methods 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
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
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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
- F24F11/89—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
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- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
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- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a central air-conditioning system which comprises an air conditioner external unit, a refrigerant distributor, a cold and hot water generator, a heating device, a fan coil and an air conditioner internal unit, wherein the refrigerant distributor is communicated with the air conditioner external unit through a pipeline, the cold and hot water generator is communicated with the refrigerant distributor through a pipeline, the cold and hot water generator is respectively communicated with the fan coil and the heating device through a pipeline, and the air conditioner internal unit is connected with the refrigerant distributor through a pipeline.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a central air conditioning system and a control method thereof.
Background
The traditional household water machine produces cold water and hot water with certain temperature through an external machine and a cold water and hot water generator, and the cold water and the hot water are introduced into an internal machine of a fan coil or a heating radiator and a floor heating system of a home, so that the refrigeration and heat functions are realized.
During refrigeration, the fan coil is in operation; when heating, generally the radiator or ground heating system will be used, but the user can also select whether to turn on fan coil according to the demand and heat simultaneously. Because the heat exchange medium in the fan coil is water, the refrigeration and heat effects are poorer compared with a fluorine machine under the same condition.
Disclosure of Invention
One of the objectives of the present invention is to provide a central air conditioning system which can effectively achieve the effects of all-directional cooling and heating while avoiding the disadvantages of the prior art.
One of the purposes of the invention is realized by the following technical scheme:
the central air-conditioning system comprises an air conditioner external unit, a refrigerant distributor, a cold and hot water generator, a heating device, a fan coil and an air conditioner internal unit, wherein the refrigerant distributor is communicated with the air conditioner external unit through a pipeline, the cold and hot water generator is communicated with the refrigerant distributor through a pipeline, the cold and hot water generator is respectively communicated with the fan coil and the heating device through a pipeline, and the air conditioner internal unit is connected with the refrigerant distributor through a pipeline.
Further, the air conditioner indoor unit is any one of an air pipe indoor unit, a ceiling indoor unit and a base crane indoor unit.
Furthermore, the heating device is a floor heating device or a radiator.
Further, the air conditioner outdoor unit comprises a heat exchanger, a refrigerant adjusting tank, a gas-liquid separator, a compressor and a four-way valve, wherein one end of the heat exchanger is communicated with the refrigerant distributor through a pipeline, the other end of the heat exchanger is communicated with the four-way valve through a pipeline, the refrigerant adjusting tank is communicated with the heat exchanger, the gas-liquid separator and the compressor through pipelines respectively, the gas-liquid separator is communicated with the compressor through a pipeline, the gas-liquid separator is communicated with the four-way valve through a pipeline, and the compressor is communicated with the four-way valve through a pipeline.
Furthermore, a communicating pipeline between the refrigerant adjusting tank and the compressor is provided with a pressure valve, a connecting pipeline between the pressure valve and the compressor is also provided with a high-pressure sensor, a communicating pipeline between the refrigerant adjusting tank and the gas-liquid separator is provided with a liquid discharge valve, a communicating pipeline between the liquid discharge valve and the gas-liquid separator is also provided with a low-pressure sensor, a communicating pipeline between the refrigerant adjusting tank and the heat exchanger is provided with a liquid inlet valve, and a communicating pipeline between the liquid inlet valve and the heat exchanger is also provided with a heating electronic expansion valve.
Further, the four-way valve comprises an S end, a D end, a C end and an E end, the heat exchanger is communicated with the C end of the four-way valve, the refrigerant distributor is communicated with the E end of the four-way valve, the gas-liquid separator is communicated with the S end of the four-way valve, and the compressor is communicated with the D end of the four-way valve.
Has the advantages that: the user can install air conditioner internal unit and heating installation simultaneously according to the demand, or install fan coil and heating installation simultaneously, or install air conditioner internal unit, fan coil and heating installation simultaneously, can realize that 3D all-round three-dimensional heats or refrigerates fast in initial start-up stage, and the user also can select whether to close air conditioner internal unit, fan coil at any time according to individual demand simultaneously, thereby be unlikely to overheated or extravagant energy and realize all-round refrigeration, heating effect.
The second purpose of the invention is to provide a control method of a central air conditioner, which avoids the defects in the prior art, and the control method selects different forms of refrigeration and heating according to different requirements, so that the design is more intimate.
The second purpose of the invention is realized by the following technical scheme:
a control method of a central air-conditioning system comprises the following steps:
a heating step: the refrigerant is evaporated in the air conditioner external unit, the generated high-pressure gaseous refrigerant is divided into two paths after being distributed in the refrigerant distributor, one path of the high-pressure gaseous refrigerant enters the air conditioner internal unit, the other path of the high-pressure gaseous refrigerant enters the cold and hot water generator to exchange heat with water, and the water after heat exchange flows into a heating device and/or a fan coil pipe to be heated;
a refrigeration step: the refrigerant is condensed in the air conditioner external unit, the generated medium-pressure liquid refrigerant is divided into two paths after being distributed in the refrigerant distributor, one path of the medium-pressure liquid refrigerant enters the air conditioner internal unit, the other path of the medium-pressure liquid refrigerant enters the cold and hot water generator to exchange heat with water, and the water after heat exchange flows into the heating device and/or the fan coil to be refrigerated.
Further, the heating step includes the following substeps:
(1) a user starts the machine to heat, and the four-way valve is opened;
(2) the refrigerant is evaporated in an air conditioner indoor unit and/or a cold and hot water generator, enters a gas-liquid separator for gas-liquid separation, then enters a compressor for compression, and then enters a refrigerant distributor, and at the moment, the heating electronic expansion valve keeps a certain opening degree;
(3) the opening and closing of the pressurizing valve, the liquid discharge valve and the liquid inlet valve are controlled to increase or reduce the circulation amount of the refrigerant in the system;
(4) the high-pressure gaseous refrigerant is distributed in the refrigerant distributor, so that the high-pressure gaseous refrigerant enters the air conditioner for heating and/or enters the cold and hot water generator for exchanging heat with water, and the water after heat exchange flows into the heating device and/or the fan coil for heating.
Further, the refrigeration step comprises the following substeps:
(1) a user starts the machine for refrigeration, and the four-way valve is opened;
(2) the refrigerant is condensed in the heat exchanger and enters a refrigerant distributor for distribution, and the heating electronic expansion valve is fully opened at the moment;
(3) the opening and closing of the pressurizing valve, the liquid discharge valve and the liquid inlet valve are controlled to increase or reduce the circulation amount of the refrigerant in the system;
(4) the medium-pressure liquid refrigerant is divided into two paths after being distributed in the refrigerant distributor, so that the medium-pressure liquid refrigerant enters an air conditioner indoor unit for refrigeration and/or enters a cold and hot water generator to exchange heat with water, the water after heat exchange flows into a heating device and/or a fan coil for refrigeration, and the heating device is closed at the same time.
Further, in the step (3), the pressure value of the liquid inlet valve is P1, the pressure value of the pressurizing valve is P2, the pressure value of the liquid outlet valve is P3, the real-time pressure value of the low pressure sensor is PL, and the real-time pressure value of the high pressure sensor is PH, and the control is performed according to the following logic:
when the PL of the low-pressure sensor is less than or equal to P1 or the PH of the high-pressure sensor is less than or equal to P2, the pressure valve is opened, the liquid discharge valve is opened, and the liquid inlet valve is closed;
when the PH value of the high-pressure sensor is more than or equal to P3, the pressure valve is closed, the liquid discharge valve is closed, and the liquid inlet valve is opened.
Has the advantages that: the control method is used for selecting and matching different forms of refrigeration and heating according to different requirements, the design is more intimate, meanwhile, the control method of the central air-conditioning system enables the user requirements to be met to the greatest extent, and the novel central air-conditioning system is wider in market due to the multiple selectivity of products.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be derived on the basis of the following drawings without inventive effort.
Fig. 1 is a schematic overall flow chart of a central air conditioning system according to the present invention.
The figure includes: the air conditioner comprises an air conditioner external unit 1, a compressor 11, a gas-liquid separator 12, a heat exchanger 13, a refrigerant adjusting tank 14, a four-way valve 15, a heating electronic expansion valve 16, a pressurizing valve 17, a high-pressure sensor 18, a low-pressure sensor 19, a liquid discharge valve 20, a liquid inlet valve 21, a refrigerant distributor 2, a cold and hot water generator 3, a heating device 4, a fan coil 5 and an air conditioner internal unit 6.
Detailed Description
The invention is further described with reference to the following examples.
Example one
As shown in fig. 1, the present embodiment provides a central air conditioning system, which includes an air conditioner external unit 1, a refrigerant distributor 2, a cold and hot water generator 3, a heating device 4, a fan coil 5 and an air conditioner internal unit 6, further, the air conditioner internal unit 6 is any one of an air pipe internal unit, a ceiling internal unit and a seat crane internal unit, and the heating device 4 is a floor heating unit or a radiator; the refrigerant distributor 2 is communicated with the air conditioner external unit 1 through a pipeline, the cold and hot water generator 3 is communicated with the refrigerant distributor 2 through a pipeline, the cold and hot water generator 3 is respectively communicated with the fan coil 5 and the heating device 4 through pipelines, and the air conditioner internal unit 6 is connected with the refrigerant distributor 2 through a pipeline.
In a preferred embodiment, the outdoor unit 1 of the air conditioner comprises a heat exchanger 13, a refrigerant adjusting tank 14, a gas-liquid separator 12, a compressor 11 and a four-way valve 15, wherein one end of the heat exchanger 13 is communicated with the refrigerant distributor 2 through a pipeline, the other end of the heat exchanger is communicated with the four-way valve 15 through a pipeline, the refrigerant adjusting tank 14 is respectively communicated with the heat exchanger 13, the gas-liquid separator 12 and the compressor 11 through pipelines, the gas-liquid separator 12 is communicated with the compressor 11 through a pipeline, the gas-liquid separator 12 is further communicated with the four-way valve 15 through a pipeline, and the compressor 11.
In a preferred embodiment, a communication pipeline between the refrigerant adjusting tank 14 and the compressor 11 is provided with a pressurization valve 17, a connection pipeline between the pressurization valve 17 and the compressor 11 is further provided with a high pressure sensor 18, a communication pipeline between the refrigerant adjusting tank 14 and the gas-liquid separator 12 is provided with a liquid discharge valve 20, a communication pipeline between the liquid discharge valve 20 and the gas-liquid separator 12 is further provided with a low pressure sensor 19, a communication pipeline between the refrigerant adjusting tank 14 and the heat exchanger 13 is provided with a liquid inlet valve 21, and a communication pipeline between the liquid inlet valve 21 and the heat exchanger 13 is further provided with a heating electronic expansion valve 16.
In a preferred embodiment, the four-way valve 15 includes an S end, a D end, a C end and an E end, the heat exchanger 13 is communicated with the C end of the four-way valve 15, the refrigerant distributor 2 is communicated with the E end of the four-way valve 15, the gas-liquid separator 12 is communicated with the S end of the four-way valve 15, and the compressor 11 is communicated with the D end of the four-way valve 15.
An installation collocation manner of a central air conditioning system in this embodiment: installing an air pipe indoor unit (or a ceiling indoor unit) and a floor heater (or a radiator) in the same room;
in the above installation and collocation manner, the embodiment further provides a control method of the central air conditioning system, which includes the following steps:
a heating step:
(1) a user starts up the machine for heating, and the four-way valve 15 is opened to enable the D-E to be communicated and the C-S to be communicated;
(2) the refrigerant is evaporated in the heat exchanger 13, enters the gas-liquid separator 12 through C-S for gas-liquid separation, then enters the compressor 11 for compression, and enters the refrigerant distributor 2 through D-E, and at the moment, the heating electronic expansion valve 16 keeps a certain opening degree;
(3) the pressure value of the liquid inlet valve 21 is P1, the pressure value of the pressurizing valve 17 is P2, the pressure value of the liquid outlet valve 20 is P3, and the real-time pressure value of the low-pressure sensor 19 is PLAnd the real-time pressure value of the high pressure sensor 18 is PHThe control is performed according to the following logic:
when the low pressure sensor 19PLP1 or high pressure sensor 18PHWhen the pressure is less than or equal to P2, the pressurizing valve 17 is opened, the liquid discharging valve 20 is opened, and the liquid inlet valve 21 is closed;
when the high pressure sensor 18PHWhen the pressure is not less than P3, the pressure valve 17 is closed, the liquid discharge valve 20 is closed, and the liquid inlet valve 21 is opened, so as to increase or reduce the circulation volume of the refrigerant in the system;
(4) high-pressure gaseous refrigerant is distributed in refrigerant distributor 2, and a part of refrigerant gets into and condenses in the tuber pipe indoor set (or the raise indoor set), and a part of refrigerant flows into in cold and hot water generator 3, carries out the heat transfer with water, and rivers after the heat transfer are heated in going into ground heating (or radiator), and it is to be noted that the inflow of fan coil 5 and outflow water pipe are all in the off-state this moment.
A refrigeration step:
(1) a user starts the machine for refrigeration, and the four-way valve 15 is opened to enable the D-E to be communicated and the C-S to be communicated;
(2) the refrigerant is condensed in the heat exchanger 13, enters the gas-liquid separator 12 through C-S for gas-liquid separation, then enters the compressor 11 for compression, and enters the refrigerant distributor 2 through D-E, and at the moment, the heating electronic expansion valve 16 keeps a certain opening degree;
(3) the pressure value of the liquid inlet valve 21 is P1, and the pressure value of the pressurizing valve 17 is P1P2, P3 pressure value of drain valve 20 and P real-time pressure value of low-pressure sensor 19LAnd the real-time pressure value of the high pressure sensor 18 is PHThe control is performed according to the following logic:
when the low pressure sensor 19PLP1 or high pressure sensor 18PHWhen the pressure is less than or equal to P2, the pressurizing valve 17 is opened, the liquid discharging valve 20 is opened, and the liquid inlet valve 21 is closed;
when the high pressure sensor 18PHWhen the pressure is not less than P3, the pressure valve 17 is closed, the liquid discharge valve 20 is closed, and the liquid inlet valve 21 is opened, so as to increase or reduce the circulation volume of the refrigerant in the system;
(4) the medium-pressure liquid refrigerant enters the refrigerant distributor 2 and then enters an air pipe inner machine (or a ceiling inner machine) for evaporation, and attention needs to be paid to that the floor heater (or a radiator) is in a closed state at the moment.
The benefits of this embodiment: through the control, the floor heating or the heating radiator is located below the whole room, the air duct machine or the courtyard unit is located above the room, when the floor heating or the heating radiator and the air duct machine or the courtyard unit are simultaneously started, 3D omnibearing three-dimensional rapid heating can be achieved in the initial starting stage, and meanwhile, a user can select whether to close the air duct machine or the courtyard unit at any time according to personal requirements, so that overheating or energy waste is avoided.
Example two
The difference between the present embodiment and the first embodiment is: the installation and collocation method of the central air-conditioning system in the embodiment is as follows: the indoor unit of the seat crane and the floor heating (or radiator) are installed in the same room, and further the indoor unit of the seat crane can be selectively installed or hoisted.
Under the installation collocation mode, the control method of the central air-conditioning system comprises the following steps:
a heating step:
(1) a user starts up the machine for heating, and the four-way valve 15 is opened to enable the D-E to be communicated and the C-S to be communicated;
(2) the refrigerant is evaporated in the heat exchanger 13, enters the gas-liquid separator 12 through C-S for gas-liquid separation, then enters the compressor 11 for compression, and enters the refrigerant distributor 2 through D-E, and at the moment, the heating electronic expansion valve 16 keeps a certain opening degree;
(3) the pressure value of the liquid inlet valve 21 is P1, the pressure value of the pressurizing valve 17 is P2, the pressure value of the liquid outlet valve 20 is P3, and the real-time pressure value of the low-pressure sensor 19 is PLAnd the real-time pressure value of the high pressure sensor 18 is PHThe control is performed according to the following logic:
when the low pressure sensor 19PLP1 or high pressure sensor 18PHWhen the pressure is less than or equal to P2, the pressurizing valve 17 is opened, the liquid discharging valve 20 is opened, and the liquid inlet valve 21 is closed;
when the high pressure sensor 18PHWhen the pressure is not less than P3, the pressure valve 17 is closed, the liquid discharge valve 20 is closed, and the liquid inlet valve 21 is opened, so as to increase or reduce the circulation volume of the refrigerant in the system;
(4) high-pressure gaseous refrigerant is distributed in the refrigerant distributor 2, a part of refrigerant enters the interior of the seat crane to be condensed, a part of refrigerant flows into the cold and hot water generator 3 to exchange heat with water, and water after heat exchange flows into ground heating (or a radiator) to be heated.
A refrigeration step:
(1) a user starts the machine for refrigeration, and the four-way valve 15 is opened to enable the D-E to be communicated and the C-S to be communicated;
(2) the refrigerant is condensed in the heat exchanger 13, enters the gas-liquid separator 12 through C-S for gas-liquid separation, then enters the compressor 11 for compression, and enters the refrigerant distributor 2 through D-E, and at the moment, the heating electronic expansion valve 16 keeps a certain opening degree;
(3) the pressure value of the liquid inlet valve 21 is P1, the pressure value of the pressurizing valve 17 is P2, the pressure value of the liquid outlet valve 20 is P3, and the real-time pressure value of the low-pressure sensor 19 is PLAnd the real-time pressure value of the high pressure sensor 18 is PHThe control is performed according to the following logic:
when the low pressure sensor 19PLP1 or high pressure sensor 18PHWhen the pressure is less than or equal to P2, the pressurizing valve 17 is opened, the liquid discharging valve 20 is opened, and the liquid inlet valve 21 is closed;
when the high pressure sensor 18PHWhen the pressure is not less than P3, the pressure valve 17 is closed, the liquid discharge valve 20 is closed, and the liquid inlet valve 21 is opened, so as to increase or reduce the circulation volume of the refrigerant in the system;
(4) the medium-pressure liquid refrigerant enters the refrigerant distributor 2 and then enters an air pipe inner machine (or a ceiling inner machine) for evaporation, and attention needs to be paid to that the floor heater (or a radiator) is in a closed state at the moment.
EXAMPLE III
The difference between the present embodiment and the first embodiment is: the installation and collocation method of the central air-conditioning system in the embodiment is as follows: and a fan coil 5 and a floor heater (or a radiator) are arranged in the same room.
Under the installation collocation mode, the control method of the central air-conditioning system comprises the following steps:
a heating step:
(1) a user starts up the machine for heating, and the four-way valve 15 is opened to enable the D-E to be communicated and the C-S to be communicated;
(2) the refrigerant is evaporated in the heat exchanger 13, enters the gas-liquid separator 12 through C-S for gas-liquid separation, then enters the compressor 11 for compression, and enters the refrigerant distributor 2 through D-E, and at the moment, the heating electronic expansion valve 16 keeps a certain opening degree;
(3) the pressure value of the liquid inlet valve 21 is P1, the pressure value of the pressurizing valve 17 is P2, the pressure value of the liquid outlet valve 20 is P3, and the real-time pressure value of the low-pressure sensor 19 is PLAnd the real-time pressure value of the high pressure sensor 18 is PHThe control is performed according to the following logic:
when the low pressure sensor 19PLP1 or high pressure sensor 18PHWhen the pressure is less than or equal to P2, the pressurizing valve 17 is opened, the liquid discharging valve 20 is opened, and the liquid inlet valve 21 is closed;
when the high pressure sensor 18PHWhen the pressure is not less than P3, the pressure valve 17 is closed, the liquid discharge valve 20 is closed, and the liquid inlet valve 21 is opened, so as to increase or reduce the circulation volume of the refrigerant in the system;
(4) high-pressure gaseous refrigerant is distributed in the refrigerant distributor 2, all the refrigerant flows into the cold and hot water generator 3 to exchange heat with water, and the water after heat exchange flows into the fan coil 5 and the floor heater (or a radiator) to perform heating.
A refrigeration step:
(1) a user starts the machine for refrigeration, and the four-way valve 15 is opened to enable the D-E to be communicated and the C-S to be communicated;
(2) the refrigerant is condensed in the heat exchanger 13, enters the gas-liquid separator 12 through C-S for gas-liquid separation, then enters the compressor 11 for compression, and enters the refrigerant distributor 2 through D-E, and at the moment, the heating electronic expansion valve 16 keeps a certain opening degree;
(3) the pressure value of the liquid inlet valve 21 is P1, the pressure value of the pressurizing valve 17 is P2, the pressure value of the liquid outlet valve 20 is P3, and the real-time pressure value of the low-pressure sensor 19 is PLAnd the real-time pressure value of the high pressure sensor 18 is PHThe control is performed according to the following logic:
when the low pressure sensor 19PLP1 or high pressure sensor 18PHWhen the pressure is less than or equal to P2, the pressurizing valve 17 is opened, the liquid discharging valve 20 is opened, and the liquid inlet valve 21 is closed;
when the high pressure sensor 18PHWhen the pressure is not less than P3, the pressure valve 17 is closed, the liquid discharge valve 20 is closed, and the liquid inlet valve 21 is opened, so as to increase or reduce the circulation volume of the refrigerant in the system;
(4) the medium-pressure liquid refrigerant is distributed in the refrigerant distributor 2, all the refrigerants flow into the cold and hot water generator 3 to exchange heat with water, the water after heat exchange flows into the fan coil 5 and the floor heater (or the radiator) to refrigerate during heating, and the floor heater (or the radiator) is closed at the same time.
The benefit of this embodiment, through above-mentioned control, ground warms up (or the radiator) and is located the below in whole room, and the wind dish is located the top in room, when ground warms up (or the radiator) and wind dish is opened simultaneously, can realize the quick heating of the all-round three-dimensional formula of 3D in initial start-up stage, and the user also can select whether to close the wind dish according to individual demand simultaneously at any time, is unlikely to overheated or extravagant energy.
Example four
The difference between the present embodiment and the first embodiment is: the installation and collocation method of the central air-conditioning system in the embodiment is as follows: a fan coil 5 and a seat crane inner unit are installed in the same room, and further the seat crane inner unit is installed selectively.
Under the installation collocation mode, the control method of the central air-conditioning system comprises the following steps:
a heating step:
(1) a user starts up the machine for heating, and the four-way valve 15 is opened to enable the D-E to be communicated and the C-S to be communicated;
(2) the refrigerant is evaporated in the heat exchanger 13, enters the gas-liquid separator 12 through C-S for gas-liquid separation, then enters the compressor 11 for compression, and enters the refrigerant distributor 2 through D-E, and at the moment, the heating electronic expansion valve 16 keeps a certain opening degree;
(3) the pressure value of the liquid inlet valve 21 is P1, the pressure value of the pressurizing valve 17 is P2, the pressure value of the liquid outlet valve 20 is P3, and the real-time pressure value of the low-pressure sensor 19 is PLAnd the real-time pressure value of the high pressure sensor 18 is PHThe control is performed according to the following logic:
when the low pressure sensor 19PLP1 or high pressure sensor 18PHWhen the pressure is less than or equal to P2, the pressurizing valve 17 is opened, the liquid discharging valve 20 is opened, and the liquid inlet valve 21 is closed;
when the high pressure sensor 18PHWhen the pressure is not less than P3, the pressure valve 17 is closed, the liquid discharge valve 20 is closed, and the liquid inlet valve 21 is opened, so as to increase or reduce the circulation volume of the refrigerant in the system;
(4) high-pressure gaseous refrigerant is distributed in the refrigerant distributor 2, a part of refrigerant reenters each pedestal crane to be evaporated, a part of refrigerant flows into the cold and hot water generator 3 to exchange heat with water, and water after heat exchange flows into each fan coil 5 to be heated.
A refrigeration step:
(1) a user starts the machine for refrigeration, and the four-way valve 15 is opened to enable the D-C to be communicated and the E-S to be communicated;
(2) the refrigerant is condensed in the heat exchanger 13, enters the gas-liquid separator 12 through C-S for gas-liquid separation, then enters the compressor 11 for compression, and enters the refrigerant distributor 2 through D-E, and at the moment, the heating electronic expansion valve 16 keeps a certain opening degree;
(3) the pressure value of the liquid inlet valve 21 is P1, the pressure value of the pressurizing valve 17 is P2, the pressure value of the liquid outlet valve 20 is P3, and the real-time pressure value of the low-pressure sensor 19 is PLAnd the real-time pressure value of the high pressure sensor 18 is PHThe control is performed according to the following logic:
when the low pressure sensor 19PLP1 or high pressure sensor 18PHWhen the pressure is less than or equal to P2, the pressurizing valve 17 is opened, the liquid discharging valve 20 is opened, and the liquid inlet valve 21 is closed;
when the high pressure sensor 18PHWhen the pressure is not less than P3, the pressure valve 17 is closed, the liquid discharge valve 20 is closed, and the liquid inlet valve 21 is opened, so as to increase or reduce the circulation volume of the refrigerant in the system;
(4) the medium-pressure liquid refrigerant is distributed in the refrigerant distributor 2, a part of the refrigerant enters the pedestal crane again to be evaporated, a part of the refrigerant flows into the cold and hot water generator 3 to exchange heat with water, the water after heat exchange flows into each fan coil 5 to be refrigerated, and at the moment, inflow and outflow water pipes of the floor heating/heating radiator are both in a closed state.
The advantage of this embodiment, the interior frame dress of seat crane is located the below in whole room, and fan coil 5 is located the top in room, and when seat crane and fan coil 5 were opened simultaneously, can realize the quick refrigeration of 3D all-round three-dimensional or heat at initial start-up stage, and the user also can be according to individual demand, whether select to close fan coil 5 or seat crane at any time, is unlikely to subcooling or overheated.
EXAMPLE five
The difference between the present embodiment and the first embodiment is: the installation and collocation method of the central air-conditioning system in the embodiment is as follows: an air pipe inner machine (or a ceiling inner machine) and a seat crane inner machine are installed in the same room, and further the seat crane inner machine is selectively installed.
Under the installation collocation mode, the control method of the central air-conditioning system comprises the following steps:
a heating step:
(1) a user starts the machine to heat, the four-way valve 15D-E is communicated, and the C-S is communicated;
(2) the refrigerant is evaporated in the heat exchanger 13, enters the gas-liquid separator 12 through C-S for gas-liquid separation, then enters the compressor 11 for compression, and enters the refrigerant distributor 2 through D-E, and at the moment, the heating electronic expansion valve 16 keeps a certain opening degree;
(3) the pressure value of the liquid inlet valve 21 is P1, the pressure value of the pressurizing valve 17 is P2, the pressure value of the liquid outlet valve 20 is P3, and the real-time pressure value of the low-pressure sensor 19 is PLAnd the real-time pressure value of the high pressure sensor 18 is PHIs carried out according to the following logicControlling:
when the low pressure sensor 19PLP1 or high pressure sensor 18PHWhen the pressure is less than or equal to P2, the pressurizing valve 17 is opened, the liquid discharging valve 20 is opened, and the liquid inlet valve 21 is closed;
when the high pressure sensor 18PHWhen the pressure is not less than P3, the pressure valve 17 is closed, the liquid discharge valve 20 is closed, and the liquid inlet valve 21 is opened, so as to increase or reduce the circulation volume of the refrigerant in the system;
(4) the high-pressure gaseous refrigerant is distributed in the refrigerant distributor 2, so that all the high-pressure gaseous refrigerant flows into the air pipe inner machine (or the ceiling inner machine) and the base crane inner machine for heating.
A refrigeration step:
(1) a user starts the machine for refrigeration, and the four-way valve 15 is opened to enable the D-C to be communicated and the E-S to be communicated;
(2) the refrigerant is condensed in the heat exchanger 13, enters the gas-liquid separator 12 through C-S for gas-liquid separation, then enters the compressor 11 for compression, and enters the refrigerant distributor 2 through D-E, and at the moment, the heating electronic expansion valve 16 keeps a certain opening degree;
(3) the pressure value of the liquid inlet valve 21 is P1, the pressure value of the pressurizing valve 17 is P2, the pressure value of the liquid outlet valve 20 is P3, and the real-time pressure value of the low-pressure sensor 19 is PLAnd the real-time pressure value of the high pressure sensor 18 is PHThe control is performed according to the following logic:
when the low pressure sensor 19PLP1 or high pressure sensor 18PHWhen the pressure is less than or equal to P2, the pressurizing valve 17 is opened, the liquid discharging valve 20 is opened, and the liquid inlet valve 21 is closed;
when the high pressure sensor 18PHWhen the pressure is not less than P3, the pressure valve 17 is closed, the liquid discharge valve 20 is closed, and the liquid inlet valve 21 is opened, so as to increase or reduce the circulation volume of the refrigerant in the system;
(4) the medium-pressure liquid refrigerant is distributed in the refrigerant distributor 2, so that all the medium-pressure liquid refrigerant flows into the air pipe inner machine (or the ceiling inner machine) and the base crane inner machine for refrigeration.
The advantage of this embodiment, tuber pipe machine (or raise boring machine) is located the top in room, and the seat of seat dress hangs the indoor unit and is located the below in whole room, and when tuber pipe machine (or raise boring machine) and seat hang the indoor unit and open simultaneously, can realize that 3D all-round three-dimensional is fast to be heated or refrigerate at initial start-up stage, and the user also can be according to individual demand, selects to close tuber pipe machine (or raise boring machine) or seat hang the indoor unit at any time, is unlikely to overheated or the waste energy of subcooling.
EXAMPLE six
The difference between the present embodiment and the first embodiment is: the installation and collocation method of the central air-conditioning system in the embodiment is as follows: only an air pipe inner machine (or a ceiling inner machine) or only a base crane inner machine is arranged in the same room.
Under the installation collocation mode, the control method of the central air-conditioning system comprises the following steps:
a heating step:
(1) a user starts up the machine for heating, and the four-way valve 15 is opened to enable the D-E to be communicated and the C-S to be communicated;
(2) the refrigerant is evaporated in the heat exchanger 13, enters the gas-liquid separator 12 through C-S for gas-liquid separation, then enters the compressor 11 for compression, and enters the refrigerant distributor 2 through D-E, and at the moment, the heating electronic expansion valve 16 keeps a certain opening degree;
(3) the pressure value of the liquid inlet valve 21 is P1, the pressure value of the pressurizing valve 17 is P2, the pressure value of the liquid outlet valve 20 is P3, and the real-time pressure value of the low-pressure sensor 19 is PLAnd the real-time pressure value of the high pressure sensor 18 is PHThe control is performed according to the following logic:
when the low pressure sensor 19PLP1 or high pressure sensor 18PHWhen the pressure is less than or equal to P2, the pressurizing valve 17 is opened, the liquid discharging valve 20 is opened, and the liquid inlet valve 21 is closed;
when the high pressure sensor 18PHWhen the pressure is not less than P3, the pressure valve 17 is closed, the liquid discharge valve 20 is closed, and the liquid inlet valve 21 is opened, so as to increase or reduce the circulation volume of the refrigerant in the system;
(4) the high-pressure gaseous refrigerant is distributed in the refrigerant distributor 2, so that the high-pressure gaseous refrigerant completely flows into the air pipe indoor unit (or the ceiling indoor unit) or the base crane indoor unit to be heated.
A refrigeration step:
(1) a user starts the machine for refrigeration, and the four-way valve 15 is opened to enable the D-C to be communicated and the E-S to be communicated;
(2) the refrigerant is condensed in the heat exchanger 13, enters the gas-liquid separator 12 through C-S for gas-liquid separation, then enters the compressor 11 for compression, and enters the refrigerant distributor 2 through D-E, and at the moment, the heating electronic expansion valve 16 keeps a certain opening degree;
(3) through the opening and closing of control pressurization valve 17, flowing-out valve 20 and feed liquor valve 21 for increase or reduce the refrigerant circulation volume in the system for the formation of high pressure gaseous state refrigerant in the outer machine 1 of air conditioner, specific control mode is: the pressure value of the liquid inlet valve 21 is P1, the pressure value of the pressurizing valve 17 is P2, the pressure value of the liquid outlet valve 20 is P3, and the real-time pressure value of the low-pressure sensor 19 is PLAnd the real-time pressure value of the high pressure sensor 18 is PHThe control is performed according to the following logic:
when the low pressure sensor 19PLP1 or high pressure sensor 18PHWhen the pressure is less than or equal to P2, the pressurizing valve 17 is opened, the liquid discharging valve 20 is opened, and the liquid inlet valve 21 is closed;
when the high pressure sensor 18PHWhen the pressure is not less than P3, the pressure valve 17 is closed, the liquid discharge valve 20 is closed, and the liquid inlet valve 21 is opened, so as to increase or reduce the circulation volume of the refrigerant in the system;
(4) the medium-pressure liquid refrigerant is distributed in the refrigerant distributor 2, so that the medium-pressure liquid refrigerant can completely flow into the air pipe inner machine (or the ceiling inner machine) or the base crane inner machine for refrigeration.
EXAMPLE seven
The difference between the present embodiment and the first embodiment is: the installation and collocation method of the central air-conditioning system in the embodiment is as follows: only the fan coil 5 is installed in the same room.
Under the installation collocation mode, the control method of the central air-conditioning system comprises the following steps:
a heating step:
(1) a user starts up the machine for heating, and the four-way valve 15 is opened to enable the D-E to be communicated and the C-S to be communicated;
(2) the refrigerant is evaporated in the heat exchanger 13, enters the gas-liquid separator 12 through C-S for gas-liquid separation, then enters the compressor 11 for compression, and enters the refrigerant distributor 2 through D-E, and at the moment, the heating electronic expansion valve 16 keeps a certain opening degree;
(3) the pressure value of the liquid inlet valve 21 is P1, the pressure value of the pressurizing valve 17 is P2, the pressure value of the liquid outlet valve 20 is P3, and the real-time pressure value of the low-pressure sensor 19 is PLAnd the real-time pressure value of the high pressure sensor 18 is PHThe control is performed according to the following logic:
when the low pressure sensor 19PLP1 or high pressure sensor 18PHWhen the pressure is less than or equal to P2, the pressurizing valve 17 is opened, the liquid discharging valve 20 is opened, and the liquid inlet valve 21 is closed;
when the high pressure sensor 18PHWhen the pressure is not less than P3, the pressure valve 17 is closed, the liquid discharge valve 20 is closed, and the liquid inlet valve 21 is opened, so as to increase or reduce the circulation volume of the refrigerant in the system;
(4) high-pressure gaseous refrigerant is distributed in the refrigerant distributor 2, all the refrigerant flows into the cold and hot water generator 3 to exchange heat with water, and the water after heat exchange flows into the fan coil 5 to perform heating.
A refrigeration step:
(1) a user starts the machine for refrigeration, and the four-way valve 15 is opened to enable the D-C to be communicated and the E-S to be communicated;
(2) the refrigerant is condensed in the heat exchanger 13, enters the gas-liquid separator 12 through C-S for gas-liquid separation, then enters the compressor 11 for compression, and enters the refrigerant distributor 2 through D-E, and at the moment, the heating electronic expansion valve 16 keeps a certain opening degree;
(3) the pressure value of the liquid inlet valve 21 is P1, the pressure value of the pressurizing valve 17 is P2, the pressure value of the liquid outlet valve 20 is P3, and the real-time pressure value of the low-pressure sensor 19 is PLAnd the real-time pressure value of the high pressure sensor 18 is PHThe control is performed according to the following logic:
when the low pressure sensor 19PLP1 or high pressure sensor 18PHWhen the pressure is less than or equal to P2, the pressurizing valve 17 is opened, the liquid discharging valve 20 is opened, and the liquid inlet valve 21 is closed;
when the high pressure sensor 18PHWhen the pressure is not less than P3, the pressure valve 17 is closed, the liquid discharge valve 20 is closed, and the liquid inlet valve 21 is opened, so as to increase or reduce the circulation volume of the refrigerant in the system;
(4) the medium-pressure liquid refrigerant is distributed in the refrigerant distributor 2, all the refrigerant flows into the cold and hot water generator 3 to exchange heat with water, and the water after heat exchange flows into the fan coil 5 to perform heating and refrigeration.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A central air conditioning system, characterized by: the air conditioner comprises an air conditioner external unit, a refrigerant distributor, a cold and hot water generator, a heating device, a fan coil and an air conditioner internal unit, wherein the refrigerant distributor is communicated with the air conditioner external unit through a pipeline, the cold and hot water generator is communicated with the refrigerant distributor through a pipeline, the cold and hot water generator is respectively communicated with the fan coil and the heating device through a pipeline, and the air conditioner internal unit is connected with the refrigerant distributor through a pipeline.
2. A central air conditioning system as set forth in claim 1, wherein: the air conditioner indoor unit is any one of an air pipe indoor unit, a ceiling indoor unit and a base crane indoor unit.
3. A central air conditioning system as set forth in claim 1, wherein: the heating device is a floor heating device or a radiator.
4. A central air conditioning system as set forth in claim 1, wherein: the air conditioner outdoor unit comprises a heat exchanger, a refrigerant adjusting tank, a gas-liquid separator, a compressor and a four-way valve, wherein one end of the heat exchanger is communicated with a refrigerant distributor through a pipeline, the other end of the heat exchanger is communicated with the four-way valve through a pipeline, the refrigerant adjusting tank is communicated with the heat exchanger, the gas-liquid separator and the compressor through pipelines respectively, the gas-liquid separator is communicated with the compressor through a pipeline, the gas-liquid separator is communicated with the four-way valve through a pipeline, and the compressor is communicated with the four-way valve through a pipeline.
5. A central air conditioning system as set forth in claim 4, wherein: the refrigerant adjusting tank is characterized in that a communicating pipeline between the refrigerant adjusting tank and the compressor is provided with a pressure valve, a connecting pipeline between the pressure valve and the compressor is also provided with a high-pressure sensor, a communicating pipeline between the refrigerant adjusting tank and the gas-liquid separator is provided with a liquid discharge valve, a communicating pipeline between the liquid discharge valve and the gas-liquid separator is also provided with a low-pressure sensor, a communicating pipeline between the refrigerant adjusting tank and the heat exchanger is provided with a liquid inlet valve, and a communicating pipeline between the liquid inlet valve and the heat exchanger is also provided with a heating electronic expansion valve.
6. A central air conditioning system as set forth in claim 4, wherein: the four-way valve comprises an S end, a D end, a C end and an E end, the heat exchanger is communicated with the C end of the four-way valve, the refrigerant distributor is communicated with the E end of the four-way valve, the gas-liquid separator is communicated with the S end of the four-way valve, and the compressor is communicated with the D end of the four-way valve.
7. The control method of a central air conditioning system as claimed in any one of claims 1 to 6, wherein: the method comprises the following steps:
a heating step: the refrigerant is evaporated in the air conditioner external unit, the generated high-pressure gaseous refrigerant is divided into two paths after being distributed in the refrigerant distributor, one path of the high-pressure gaseous refrigerant enters the air conditioner internal unit, the other path of the high-pressure gaseous refrigerant enters the cold and hot water generator to exchange heat with water, and the water after heat exchange flows into a heating device and/or a fan coil pipe to be heated;
a refrigeration step: the refrigerant is condensed in the air conditioner external unit, the generated medium-pressure liquid refrigerant is divided into two paths after being distributed in the refrigerant distributor, one path of the medium-pressure liquid refrigerant enters the air conditioner internal unit, the other path of the medium-pressure liquid refrigerant enters the cold and hot water generator to exchange heat with water, and the water after heat exchange flows into the heating device and/or the fan coil to be refrigerated.
8. The control method of a central air conditioning system as set forth in claim 7, wherein: the heating step comprises the following substeps:
(1) a user starts the machine to heat, and the four-way valve is opened;
(2) the refrigerant is evaporated in an air conditioner indoor unit and/or a cold and hot water generator, enters a gas-liquid separator for gas-liquid separation, then enters a compressor for compression, and then enters a refrigerant distributor, and at the moment, the heating electronic expansion valve keeps a certain opening degree;
(3) the opening and closing of the pressurizing valve, the liquid discharge valve and the liquid inlet valve are controlled to increase or reduce the circulation amount of the refrigerant in the system;
(4) the high-pressure gaseous refrigerant is distributed in the refrigerant distributor, so that the high-pressure gaseous refrigerant enters the air conditioner for heating and/or enters the cold and hot water generator for exchanging heat with water, and the water after heat exchange flows into the heating device and/or the fan coil for heating.
9. The control method of a central air conditioning system as set forth in claim 7, wherein: the refrigeration step comprises the following substeps:
(1) a user starts the machine for refrigeration, and the four-way valve is opened;
(2) the refrigerant is condensed in the heat exchanger and enters a refrigerant distributor for distribution, and the heating electronic expansion valve is fully opened at the moment;
(3) the opening and closing of the pressurizing valve, the liquid discharge valve and the liquid inlet valve are controlled to increase or reduce the circulation amount of the refrigerant in the system;
(4) the medium-pressure liquid refrigerant is divided into two paths after being distributed in the refrigerant distributor, so that the medium-pressure liquid refrigerant enters an air conditioner indoor unit for refrigeration and/or enters a cold and hot water generator to exchange heat with water, the water after heat exchange flows into a heating device and/or a fan coil for refrigeration, and the heating device is closed at the same time.
10. A control method of a central air conditioning system as set forth in claim 8 or 9, characterized in that: in the step (3), the pressure value of the liquid inlet valve is P1, and the pressurizing valveThe pressure value is P2, the pressure value of the drain valve is P3, and the real-time pressure value of the low-pressure sensor is PLAnd the real-time pressure value of the high-pressure sensor is PHThe control is performed according to the following logic:
when the low pressure sensor PLP1 or high pressure sensor PHWhen the pressure is less than or equal to P2, the pressure valve is opened, the liquid discharge valve is opened, and the liquid inlet valve is closed;
when high pressure sensor PHWhen the pressure is not less than P3, the pressure valve is closed, the liquid discharge valve is closed, and the liquid inlet valve is opened.
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