CN109341138B - Combined air conditioning system of machine room and hot water system and control method thereof - Google Patents
Combined air conditioning system of machine room and hot water system and control method thereof Download PDFInfo
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- CN109341138B CN109341138B CN201811132516.6A CN201811132516A CN109341138B CN 109341138 B CN109341138 B CN 109341138B CN 201811132516 A CN201811132516 A CN 201811132516A CN 109341138 B CN109341138 B CN 109341138B
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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
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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Abstract
The invention discloses a combined air conditioning system of a machine room and a hot water system, which comprises a machine room compressor, a refrigeration condenser, a first throttling device, an air distribution reservoir, a liquid pump, a machine room evaporator, a hot pipe valve, a heat pipe condenser, a refrigeration valve, a second throttling device, a one-way valve, a condensation evaporator, a water side compressor, a four-way valve, a water side heat exchanger, a third throttling device, a fourth throttling device and an outdoor heat exchanger, wherein the inlet of the refrigeration condenser is communicated with the outlet of the machine room compressor; the outlet of the refrigeration condenser is communicated with the inlet of the first throttling device; the air distribution reservoir is respectively communicated with an inlet of the machine room compressor, an outlet of the heat pipe condenser, an outlet of the first throttling device and an inlet of the liquid pump. The invention can realize high-efficiency refrigeration of the machine room, can realize high-energy-efficiency hot water supply of heat recovery of the machine room all the year around, fully utilizes an outdoor natural cold source and heat of the machine room, and has excellent energy-saving and emission-reducing effects.
Description
Technical Field
The invention relates to the technical field of air conditioners.
Background
The rapid development of information industry and digital construction promotes the number of machine rooms and base stations, the construction scale is rapidly increased, and the energy consumption of the air conditioners of the machine rooms and the base stations accounts for 40% -50% of the total energy consumption according to statistics. The sensible heat load ratio of machine room, base station is big, need continuous operation throughout the year, and in the season that indoor side settlement temperature is less than outdoor side temperature, conventional air conditioning system still need continue to operate compression refrigerating system, and refrigerating system work efficiency is low and easily breaks down, if can utilize indoor outer difference in temperature low-cost transport heat or for indoor side provides cold volume, will reduce air conditioning system's energy consumption and running cost greatly. The refrigerating system can be efficiently operated by utilizing the land cooling in high-temperature seasons such as summer and the like. And the energy efficiency of the system is greatly improved. The method of providing cold energy to indoor side by using outdoor low-temperature air has been paid attention by the researchers and the engineers in the industry, and the researches on engineering technology are developed in different forms, such as the currently adopted fresh air system, the air-air and air-water heat exchange systems in different forms, and the composite air conditioner applying the heat pipe technology.
Disclosure of Invention
The invention aims to provide a combined air conditioning system of a machine room and a hot water system and a control method thereof, which improve the operation efficiency of the system and realize energy conservation and emission reduction.
The technical scheme for realizing the purpose is as follows:
a combined air conditioning system of a machine room and a hot water system comprises a machine room compressor, a refrigeration condenser, a first throttling device, an air distribution reservoir, a liquid pump, a machine room evaporator, a heat pipe valve, a heat pipe condenser, a refrigeration valve, a second throttling device, a one-way valve, a condensation evaporator, a water side compressor, a four-way valve, a water side heat exchanger, a third throttling device, a fourth throttling device and an outdoor heat exchanger, wherein,
the inlet of the refrigeration condenser is communicated with the outlet of the machine room compressor; the outlet of the refrigeration condenser is communicated with the inlet of the first throttling device;
the air distribution liquid storage device is respectively communicated with an inlet of the machine room compressor, an outlet of the heat pipe condenser, an outlet of the first throttling device and an inlet of the liquid pump;
the outlet of the liquid pump is communicated with the inlet of the machine room evaporator through a one-way valve;
the first interface of the condensation evaporator is communicated with the outlet of the machine room evaporator through the heat pipe valve, the second interface is communicated with the inlet of the heat pipe condenser, the third interface is communicated with the outdoor heat exchanger through a fourth throttling device, and the fourth interface is communicated with the water side heat exchanger through the third throttling device;
two ends of the refrigerating valve are respectively communicated with an outlet of the machine room evaporator and an outlet of the heat pipe condenser;
two ends of the second throttling device are respectively communicated with an outlet of the refrigeration condenser and an inlet of the machine room evaporator;
and four ports of the four-way valve are respectively communicated with two ends of the water side compressor, the outdoor heat exchanger and the water side heat exchanger.
Preferably, the refrigeration condenser is a water-cooled condenser, an air-cooled condenser or an evaporative condenser.
A control method of a combined air conditioning system of a machine room and a hot water system is characterized in that,
when the outdoor temperature T0 is higher than the set temperature T2, the machine room air conditioner needs to supply cold, the hot water system needs to supply hot water, namely the machine room air conditioner system operates in a refrigeration mode, the hot water system operates in a heating mode, the refrigeration valve is opened, the heat pipe valve is closed, the first throttling device is closed, and the machine room air conditioner system forms a loop by a machine room compressor, a refrigeration condenser, a second throttling device, a machine room evaporator, a refrigeration valve and a gas-liquid separator; the hot water system comprises a hot water loop consisting of a water-side compressor, a four-way valve, a water-side heat exchanger, a third throttling device, a condensing evaporator, a fourth throttling device and an outdoor heat exchanger, and hot water is provided by running a heating mode;
when the outdoor temperature T0 is greater than the set temperature T1 and less than or equal to the set temperature T2, hot water needs to supply heat, a machine room air conditioner needs to supply cold, namely a hot water system needs to operate a heating mode, the machine room air conditioner needs to perform a coupling mode, a refrigerating valve is closed at the moment, a heat pipe valve is opened, a second throttling device is closed, and the machine room air conditioning system forms a loop by a machine room compressor, a refrigerating condenser, a first throttling device, an air distribution liquid storage device, a liquid pump, a machine room evaporator, a heat pipe valve, a condensation evaporator and a heat pipe condenser; the hot water system consists of a water side compressor, a four-way valve, a water side heat exchanger, a third throttling device, a condensing evaporator, a fourth throttling device and an outdoor heat exchanger to form a hot water loop; hot water is provided by operating a heating mode, and heat of a machine room is used for heating rooms;
when the outdoor temperature T0 is less than or equal to the set temperature T1, hot water needs to supply heat, a machine room air conditioner needs to supply cold, namely a hot water system needs to operate a heating mode, the machine room air conditioner needs to perform a liquid-phase heat pipe mode, a refrigerating valve is closed at the moment, a heat pipe valve is opened, a first throttling device and a second throttling device are closed, and the machine room air conditioning system forms a loop by a gas-liquid separator, a liquid pump, a machine room evaporator, a heat pipe valve, a condensation evaporator and a heat pipe condenser; the hot water system comprises a hot water loop consisting of a water side compressor, a four-way valve, a water side heat exchanger, a first throttling device, a condensing evaporator, a second throttling device and an outdoor heat exchanger, and provides hot water through a heating mode, and the room is heated through heat of a machine room.
The invention has the beneficial effects that: the invention integrates the hot water system and the machine room air conditioning system, not only utilizes the heat of the machine room to provide hot water when the hot water is needed to be provided in winter, but also solves the problems of attenuation of the heating quantity, frosting and defrosting and the like of the conventional heat pump hot water air conditioning, greatly improves the operating efficiency of the system and realizes energy conservation and emission reduction.
Drawings
FIG. 1 is a block diagram of a combined air conditioning system of a machine room and a hot water system of the present invention;
FIG. 2 is a schematic view showing a cycle of a cooling and heating mode according to the present invention;
FIG. 3 is a schematic diagram of the cycle of the coupling + hot water mode of the present invention;
fig. 4 is a circulation structure diagram of the heat pipe + hot water mode in the present invention.
Detailed Description
The invention will be further explained with reference to the drawings.
Referring to fig. 1, the combined air conditioning system of a machine room and a hot water system of the present invention includes a machine room compressor 1, a refrigeration condenser 2, a first throttling device 3, an air-separating reservoir 4, a liquid pump 5, a machine room evaporator 6, a heat pipe valve 7, a heat pipe condenser 8, a refrigeration valve 9, a second throttling device 10, a check valve 11, a condensing evaporator 12, a water-side compressor 13, a four-way valve 14, a water-side heat exchanger 15, a third throttling device 16, a fourth throttling device 17, and an outdoor heat exchanger 18.
The inlet of the refrigeration condenser 2 is communicated with the outlet of the machine room compressor 1; the outlet of the refrigeration condenser 2 is communicated with the inlet of the first throttling device 3; the air distribution liquid storage device 4 is respectively communicated with an inlet of the machine room compressor 1, an outlet of the heat pipe condenser 8, an outlet of the first throttling device 3 and an inlet of the liquid pump 5; the outlet of the liquid pump 5 is communicated with the inlet of the machine room evaporator 6 through a one-way valve 11.
The first interface of the condensation evaporator 12 is communicated with the outlet of the machine room evaporator 6 through the heat pipe valve 7, the second interface is communicated with the inlet of the heat pipe condenser 8, the third interface is communicated with the outdoor heat exchanger 18 through a fourth throttling device 17, and the fourth interface is communicated with the water side heat exchanger 15 through a third throttling device 16.
And two ends of the refrigerating valve 9 are respectively communicated with the outlet of the machine room evaporator 6 and the outlet of the heat pipe condenser 8. Two ends of the second throttling device 10 are respectively communicated with the outlet of the refrigeration condenser 2 and the inlet of the machine room evaporator 6; four ports of the four-way valve 14 are respectively communicated with two ends of the water side compressor 13, the outdoor heat exchanger 18 and the water side heat exchanger 15. The refrigeration condenser 2 is a water-cooled condenser, an air-cooled condenser or an evaporative condenser.
The control method of the combined air conditioning system of the machine room and the hot water system respectively switches different loops to operate different working modes according to different outdoor environment temperatures, different seasons and hot water supply requirements.
In summer (the outdoor temperature T0 is greater than the set temperature T2), the machine room air conditioner needs cooling, the hot water system needs hot water, that is, the machine room air conditioner system operates in a cooling mode, and the hot water system operates in a heating mode, as shown in fig. 2, at this time, the cooling valve 9 is opened, the heat pipe valve 7 is closed, the first throttling device 3 is closed, and the machine room air conditioner system forms a loop by the machine room compressor 1, the cooling condenser 2, the second throttling device 10, the machine room evaporator 6, the cooling valve 9 and the air-liquid separator 4; and the rotating speed of the compressor, the opening of the expansion valve and the rotating speed of the condenser fan are determined according to the indoor load and the outdoor temperature, so that the cold quantity regulation is realized. The hot water system is composed of a water side compressor 13, a four-way valve 14, a water side heat exchanger 15, a third throttling device 16, a condensation evaporator 12, a fourth throttling device 17 and an outdoor heat exchanger 18 to form a hot water loop, and hot water is provided through a heating mode.
When in spring and autumn transition outdoors (the outdoor temperature T0 is greater than the set temperature T1 and less than or equal to the set temperature T2), hot water needs to supply heat, and the machine room air conditioner needs to supply cold, that is, the hot water system needs to operate in a heating mode, and the machine room air conditioner needs to perform a coupling mode, as shown in fig. 3, at this time, the cooling valve 9 is closed, the heat pipe valve 7 is opened, the second throttling device 10 is closed, and the machine room air conditioning system is formed into a loop by the machine room compressor 1, the cooling condenser 2, the first throttling device 3, the air distribution liquid reservoir 4, the liquid pump 5, the machine room evaporator 6, the heat pipe valve 7, the condensation evaporator 12 and the heat pipe. And the rotating speed of the compressor and the rotating speed of the condenser fan are determined according to the indoor load and the outdoor temperature, so that the accurate adjustment of the cooling capacity is realized. The hot water system comprises a hot water loop consisting of a water-side compressor 13, a four-way valve 14, a water-side heat exchanger 15, a third throttling device 16, a condensing evaporator 12, a fourth throttling device 17 and an outdoor heat exchanger 18; the heating mode is operated to provide hot water, and the heat of the machine room is used for heating rooms.
When the outdoor temperature is in winter (the outdoor temperature T0 is less than or equal to the set temperature T1), hot water needs to supply heat, a machine room air conditioner needs to supply cold, namely the hot water system needs to operate in a heating mode, and the machine room air conditioner needs to perform a liquid-phase heat pipe mode, as shown in fig. 4, at the moment, a refrigerating valve 9 is closed, a heat pipe valve 7 is opened, a first throttling device 3 and a second throttling device 10 are closed, and the machine room air conditioning system forms a loop by a gas distribution liquid storage device 4, a liquid pump 5, a machine room evaporator 6, a heat pipe valve 7, a condensation evaporator 12 and a heat pipe condenser 8. The rotating speeds of a liquid pump and a condenser fan are determined according to the indoor load and the outdoor temperature, so that the accurate adjustment of cold quantity is realized, the working pressure (temperature) of a heat pipe is controlled, and the heat exchange capacity of the heat pipe is adjusted in the following specific mode: when the outdoor environment temperature rises or the indoor load increases, the rotating speed of the fan is increased; and when the outdoor temperature is reduced or the indoor load is reduced, reducing the rotating speed of the fan. The hot water system comprises a hot water loop consisting of a water-side compressor 13, a four-way valve 14, a water-side heat exchanger 15, a first throttling device 16, a condensation evaporator 12, a second throttling device 17 and an outdoor heat exchanger 18, and provides hot water through a heating mode and provides heat for rooms through heat of a machine room.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should also fall within the scope of the present invention, and should be defined by the claims.
Claims (3)
1. A combined air conditioning system of a machine room and a hot water system comprises a machine room compressor (1), a refrigeration condenser (2), a machine room evaporator (6) and a second throttling device (10), and is characterized by further comprising a first throttling device (3), an air distribution liquid storage device (4), a liquid pump (5), a hot pipe valve (7), a heat pipe condenser (8), a refrigeration valve (9), a one-way valve (11), a condensation evaporator (12), a water side compressor (13), a four-way valve (14), a water side heat exchanger (15), a third throttling device (16), a fourth throttling device (17) and an outdoor heat exchanger (18), wherein,
the inlet of the refrigeration condenser (2) is communicated with the outlet of the machine room compressor (1); the outlet of the refrigeration condenser (2) is communicated with the inlet of the first throttling device (3);
the air distribution liquid storage device (4) is respectively communicated with an inlet of the machine room compressor (1), an outlet of the heat pipe condenser (8), an outlet of the first throttling device (3) and an inlet of the liquid pump (5);
the outlet of the liquid pump (5) is communicated with the inlet of the machine room evaporator (6) through a one-way valve (11);
a first interface of the condensation evaporator (12) is communicated with an outlet of the machine room evaporator (6) through the heat pipe valve (7), a second interface is communicated with an inlet of the heat pipe condenser (8), a third interface is communicated with the outdoor heat exchanger (18) through a fourth throttling device (17), and a fourth interface is communicated with the water side heat exchanger (15) through a third throttling device (16);
two ends of the refrigerating valve (9) are respectively communicated with an outlet of the machine room evaporator (6) and an outlet of the heat pipe condenser (8);
two ends of the second throttling device (10) are respectively communicated with an outlet of the refrigeration condenser (2) and an inlet of the machine room evaporator (6);
and four ports of the four-way valve (14) are respectively communicated with two ends of the water-side compressor (13), the outdoor heat exchanger (18) and the water-side heat exchanger (15).
2. Combined air conditioning system of machine room and hot water system according to claim 1, characterized in that the refrigerated condenser (2) is a water-cooled condenser, an air-cooled condenser or an evaporative condenser.
3. A control method of a combined air conditioning system of a machine room and a hot water system according to claim 1,
when the outdoor temperature T0 is greater than the set temperature T2, the machine room air conditioner needs cooling, the hot water system needs hot water, namely the machine room air conditioner system operates in a cooling mode, the hot water system operates in a heating mode, the cooling valve (9) is opened, the hot pipe valve (7) is closed, the first throttling device (3) is closed, and the machine room air conditioner system forms a loop by the machine room compressor (1), the cooling condenser (2), the second throttling device (10), the machine room evaporator (6), the cooling valve (9) and the air-split liquid storage device (4); the hot water system comprises a hot water loop consisting of a water-side compressor (13), a four-way valve (14), a water-side heat exchanger (15), a third throttling device (16), a condensing evaporator (12), a fourth throttling device (17) and an outdoor heat exchanger (18), and hot water is provided through a heating mode;
when the outdoor temperature T0 is greater than the set temperature T1 and less than or equal to the set temperature T2, hot water needs to supply heat, a machine room air conditioner needs to supply cold, namely a hot water system needs to operate a heating mode, the machine room air conditioner needs to perform a coupling mode, a refrigerating valve (9) is closed at the moment, a hot pipe valve (7) is opened, a second throttling device (10) is closed, and the machine room air conditioner system forms a loop by a machine room compressor (1), a refrigerating condenser (2), a first throttling device (3), a gas distribution liquid storage device (4), a liquid pump (5), a machine room evaporator (6), a hot pipe valve (7), a condensing evaporator (12) and a heat pipe condenser (8); the hot water system consists of a water side compressor (13), a four-way valve (14), a water side heat exchanger (15), a third throttling device (16), a condensing evaporator (12), a fourth throttling device (17) and an outdoor heat exchanger (18) to form a hot water loop; hot water is provided by operating a heating mode, and heat of a machine room is used for heating rooms;
when the outdoor temperature T0 is less than or equal to the set temperature T1, hot water needs to supply heat, a machine room air conditioner needs to supply cold, namely a hot water system needs to operate a heating mode, the machine room air conditioner needs to perform a liquid-phase heat pipe mode, the cooling valve (9) is closed at the moment, the heat pipe valve (7) is opened, the first throttling device (3) and the second throttling device (10) are closed, and the machine room air conditioning system forms a loop by the air distribution liquid storage device (4), the liquid pump (5), the machine room evaporator (6), the heat pipe valve (7), the condensation evaporator (12) and the heat pipe condenser (8); the hot water system comprises a hot water loop consisting of a water-side compressor (13), a four-way valve (14), a water-side heat exchanger (15), a first throttling device (16), a condensing evaporator (12), a second throttling device (17) and an outdoor heat exchanger (18), and hot water is supplied in a heating mode and is used for heating rooms through heat of a machine room.
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| CN110030676B (en) * | 2019-04-28 | 2021-01-26 | 广东美的暖通设备有限公司 | Air conditioner control method and device and computer readable storage medium |
| CN110030677B (en) * | 2019-04-28 | 2021-01-05 | 广东美的暖通设备有限公司 | Air conditioner control method and device and computer readable storage medium |
| CN110145906B (en) * | 2019-05-16 | 2021-10-26 | 广东美的暖通设备有限公司 | Refrigerant circulation system, control method thereof and computer readable storage medium |
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