CN106765762B - Water-saving all-year operation air conditioner - Google Patents
Water-saving all-year operation air conditioner Download PDFInfo
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- CN106765762B CN106765762B CN201611209746.9A CN201611209746A CN106765762B CN 106765762 B CN106765762 B CN 106765762B CN 201611209746 A CN201611209746 A CN 201611209746A CN 106765762 B CN106765762 B CN 106765762B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/0035—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using evaporation
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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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
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
Abstract
The invention relates to the technical field of heating ventilation air conditioners, in particular to a water-saving all-year-round operation air conditioner, which can maximally utilize dry air energy and outdoor free cold sources by setting different operation modes, realize the all-year operation of an air conditioning system and achieve the aim of reducing the energy consumption of the whole air conditioning system, and simultaneously combine the evaporation refrigeration of the dry air energy with a water-cooling direct expansion unit to ensure the safety of the air conditioning system in an air conditioning area and realize the all-year-round cooling requirement of the air conditioning area. The freezing damage of the heat exchange coil during the operation in winter is avoided.
Description
Technical Field
The invention relates to the technical field of heating, ventilating and air conditioning, in particular to a water-saving all-year-round operation air conditioning device.
Background
Evaporative refrigeration is an environment-friendly energy-saving air conditioning mode, and compared with the traditional air conditioning mode, the evaporative refrigeration type air conditioning mode has considerable energy-saving effect in dry heat areas suitable for evaporative refrigeration. However, since evaporative refrigeration is a refrigeration technology for obtaining low-temperature cold air or cold water by heat-moisture exchange of water and dry air, water is an essential element in the evaporative refrigeration technology, and the water consumption of an air conditioner is large when evaporative refrigeration is used in an air conditioning area (such as a data room) requiring annual cooling; in addition, the dry air energy evaporative refrigeration is greatly influenced by the external air environment, the temperature cannot be completely controlled when cold air or cold water is prepared, the air supply requirements of air-conditioning areas cannot be met in some time periods, the annual operation of the air-conditioning system is difficult to realize, and the special air-conditioning areas have very high requirements on the annual safe operation of the air-conditioning system, so that the common dry air energy evaporative refrigeration is difficult to meet the application of a data center based on the consideration of energy conservation and safe operation.
The system has abundant dry air energy and free outdoor cold sources in dry and cold northern areas, and can utilize outdoor dry air energy to prepare cold water or cold air required by users in summer or transition seasons; in winter or transition season, outdoor free cold source (cold air) can be used for preparing cold water or cold air, so that the key for realizing the annual operation and air conditioning energy of the air conditioning system is to maximally utilize dry air energy and the outdoor free cold source for refrigeration.
Disclosure of Invention
The invention provides a water-saving all-year-round-running air conditioning device, which overcomes the defects of the prior art and can effectively solve the problem that the existing dry air energy evaporation refrigeration is difficult to realize the all-year-round running of an air conditioning system.
The technical scheme of the invention is realized by the following measures: a water-saving all-year-round operation air conditioning device comprises a cold water supply device, a first surface type heat exchanger, a plate type heat exchanger and a first user; the cold water supply device comprises a machine shell, an evaporative refrigeration cold water supply device and a first exhaust fan, wherein the evaporative refrigeration cold water supply device is arranged in the machine shell, a first exhaust port is arranged on the machine shell above the evaporative refrigeration cold water supply device, the first exhaust fan is arranged on the machine shell corresponding to the first exhaust port, a second air inlet is arranged on the machine shell below the evaporative refrigeration cold water supply device, a primary water circulation channel and a secondary water circulation channel are arranged in the plate heat exchanger, a water outlet of the evaporative refrigeration cold water supply device is communicated with an inlet of the primary water circulation channel through a first pipeline, a water inlet of the evaporative refrigeration cold water supply device is communicated with an outlet of the primary water circulation channel through a second pipeline, a first water pump is connected in series on the first pipeline, a cooling water channel and a cold air channel are arranged in the first surface heat exchanger, a water outlet of the secondary water circulation channel is communicated with an inlet of the cooling water channel of the first surface heat exchanger through a third pipeline, the outlet of the cooling water channel of the first surface type heat exchanger is communicated with the cold water inlet of a first user through a fourth pipeline, the cold water outlet of the first user is communicated with the water inlet of the secondary water circulation channel through a fifth pipeline, and a second water pump is connected to the fifth pipeline in series.
The following is further optimization or/and improvement of the technical scheme of the invention:
a first air inlet is formed in the machine shell between the first exhaust fan and the evaporative cooling cold water supply device, and a cold air channel of the first surface type heat exchanger is communicated with the first air inlet.
The cold air channel outlet of the first surface type heat exchanger is communicated with the second air inlet, a sixth pipeline is communicated between the third pipeline and the fourth pipeline, a seventh pipeline is communicated between the first pipeline and the third pipeline between the first water pump and the plate type heat exchanger, an eighth pipeline is communicated between the fourth pipeline between the first surface type heat exchanger and the sixth pipeline and the water inlet of the evaporative refrigeration cold water supply device, a first valve is connected in series with the seventh pipeline, a second valve is connected in series with the third pipeline between the sixth pipeline and the seventh pipeline, a third valve is connected in series with the sixth pipeline, a fourth valve is connected in series with the fourth pipeline between the sixth pipeline and the eighth pipeline, and a fifth valve is connected in series with the eighth pipeline.
The first guide cavity is arranged outside the shell corresponding to the first air inlet, the third air inlet is arranged on the first guide cavity, and a cold air channel outlet of the first surface type heat exchanger is respectively communicated with the second air inlet and the third air inlet.
The water-saving all-year-round operation air conditioning device also comprises a second surface type heat exchanger, wherein a cooling water channel and a cold air channel are arranged in the second surface type heat exchanger, a fourth pipeline between the first surface type heat exchanger and an eighth pipeline is communicated with the cooling water channel in the second surface type heat exchanger, the cooling water channel in the first surface type heat exchanger is connected with the cooling water channel in the second surface type heat exchanger in series, the second surface type heat exchanger is arranged in parallel and in the same direction with the cold air channel of the first surface type heat exchanger, the cold air channel outlet of the second surface type heat exchanger, a second air inlet and a third air inlet are communicated, a second guide cavity is arranged on the cold air channel inlet corresponding to the first surface type heat exchanger, a fourth air inlet is arranged on the second guide cavity, and a third guide cavity is arranged on the cold air channel inlet corresponding to the second surface type heat exchanger, and a fifth air inlet is formed in the third guide cavity.
The water-saving all-year-round operation air conditioning device further comprises a third surface type heat exchanger, a sixth air inlet and a second air outlet are further formed in the first guide cavity, a cooling water channel and a cold air channel are formed in the third surface type heat exchanger, the cold air channel of the third surface type heat exchanger is communicated with the sixth air inlet, a second exhaust fan is arranged at the second air outlet, a fourth pipeline between an eighth pipeline and a fourth valve is communicated with an inlet of the cooling water channel in the third surface type heat exchanger through a ninth pipeline, a fourth pipeline between the fourth valve and a first user is communicated with an outlet of the cooling water channel in the third surface type heat exchanger through a tenth pipeline, the sixth valve is connected to the ninth pipeline in series, and a seventh valve is connected to the tenth pipeline in series.
A first sealing cavity communicated with the first air inlet and the second air inlet is arranged outside the shell corresponding to the first air inlet and the second air inlet, a second sealing cavity is also arranged outside the first sealing cavity, the first surface type heat exchanger is arranged on the first sealing cavity, a cold air channel of the first surface type heat exchanger is communicated with the inside of the first sealing cavity, a fourth surface type heat exchanger and a third air outlet are also arranged on the second sealing cavity, a cold air channel of the fourth surface type heat exchanger is communicated with the inside of the second sealing cavity, a third air exhaust fan is arranged at the position of the third air outlet, a cooling water channel and a cold air channel are arranged in the fourth surface type heat exchanger, the cold air channel of the fourth surface type heat exchanger is communicated with the inside of the second sealing cavity, a fourth pipeline between the eighth pipeline and the fourth valve is communicated with an inlet and an outlet of the cooling water channel in the fourth surface type heat exchanger, and an eighth valve is connected in series on the fourth pipeline between the eighth pipeline and the fourth surface type heat exchanger.
A third sealed cavity communicated with the first air inlet and the second air inlet is arranged outside the casing corresponding to the first air inlet and the second air inlet, a fourth sealed cavity is further arranged outside the third sealed cavity, the first surface type heat exchanger is mounted on the third sealed cavity, a cold air channel of the first surface type heat exchanger is communicated with the inside of the third sealed cavity, a fourth surface type heat exchanger and a third air outlet are further arranged on the fourth sealed cavity, a third exhaust fan is arranged at the third air outlet, a cooling water channel and a cold air channel are arranged in the fourth surface type heat exchanger, the cold air channel of the fourth surface type heat exchanger is communicated with the inside of the fourth sealed cavity, and a fourth pipeline between the first surface type heat exchanger and the eighth pipeline is communicated with a cooling water channel inlet and a cooling water outlet in the fourth surface type heat exchanger.
The second air inlet is also provided with a fifth surface type heat exchanger, a cooling water channel and a cold air channel are arranged in the fifth surface type heat exchanger, the cold air channel of the fifth surface type heat exchanger is communicated with the second air inlet, a first pipeline between the first water pump and the plate type heat exchanger is communicated with an inlet of the cooling water channel in the fifth surface type heat exchanger, and an outlet of the cooling water channel in the fifth surface type heat exchanger is communicated with a water inlet of the evaporative refrigeration cold water supply device.
The first surface type heat exchanger is provided with a first heat exchange unit, and the second surface type heat exchanger is provided with a second exhaust fan at the outlet or the inlet of the cold air channel of the first surface type heat exchanger.
The third pipeline or the fourth pipeline is provided with a second heat exchange unit, the second heat exchange unit comprises a sixth surface type heat exchanger and a fifth exhaust fan, a cooling water channel and a cold air channel are arranged in the sixth surface type heat exchanger, the third pipeline is communicated with the inlet and the outlet of the cooling water channel of the sixth surface type heat exchanger or the fourth pipeline is communicated with the inlet and the outlet of the cooling water channel of the sixth surface type heat exchanger, and the fifth exhaust fan is arranged at the outlet or the inlet of the cold air channel of the sixth surface type heat exchanger.
The first user comprises a seventh surface type heat exchanger and a water-cooling direct expansion unit, the water-cooling direct expansion unit comprises an evaporator, a condenser, a compressor and a throttle valve, a cooling water channel and a cold air channel are arranged in the seventh surface type heat exchanger, a refrigerant channel and a cold air channel are arranged in the evaporator, the refrigerant channel and the cooling water channel are arranged in the condenser, the cold air channel of the seventh surface type heat exchanger is communicated with the cold air channel of the evaporator, a sixth exhaust fan is arranged at the outlet of the cold air channel of the evaporator, the outlet of the refrigerant channel of the evaporator is communicated with the inlet of the refrigerant channel of the condenser through the compressor, the inlet of the refrigerant channel of the evaporator is communicated with the outlet of the refrigerant channel of the condenser through the throttle valve, the outlet of the cooling water channel of the seventh surface type heat exchanger is communicated with the inlet of the cooling water channel of the condenser, and the outlet of a fourth pipeline is communicated with the inlet of the cooling water channel of the seventh surface type heat exchanger, the inlet of the fifth pipeline is communicated with the outlet of the cooling water channel of the condenser.
The water-saving all-year-round-running air conditioning device further comprises a water-cooling direct expansion unit, the water-cooling direct expansion unit comprises an evaporator, a condenser, a compressor and a throttle valve, a refrigerant channel and a cold water channel are arranged in the evaporator, the refrigerant channel and the cooling water channel are arranged in the condenser, a fourth pipeline close to the user side is communicated with an inlet and an outlet of the cold water channel of the evaporator, a fifth pipeline is communicated with the inlet and the outlet of the cooling water channel of the condenser, an outlet of the refrigerant channel of the evaporator is communicated with an inlet of the refrigerant channel of the condenser through the compressor, and an inlet of the refrigerant channel of the evaporator is communicated with an outlet of the refrigerant channel of the condenser through the throttle valve.
The first user is a heat exchange unit and a water-cooling direct expansion unit, the heat exchange unit comprises a sixth surface type heat exchanger and a fifth exhaust fan, a cooling water channel and a cold air channel are arranged in the sixth surface type heat exchanger, the water-cooling direct expansion unit comprises an evaporator, a condenser, a compressor and a throttle valve, a refrigerant channel and a cold water channel are arranged in the evaporator, a refrigerant channel and a cooling water channel are arranged in the condenser, a refrigerant channel outlet of the evaporator is communicated with a refrigerant channel inlet of the condenser through the compressor, a refrigerant channel inlet of the evaporator is communicated with a refrigerant channel outlet of the condenser through the throttle valve, an outlet of a fourth pipeline is communicated with a cooling water channel inlet of the sixth surface type heat exchanger, and an inlet of a fifth pipeline is communicated with a cooling water channel outlet of the condenser, the inlet of the cold water channel of the evaporator is communicated with a water return pipe, and the outlet of the cold water channel of the evaporator is communicated with a water supply pipe.
The invention can utilize dry air energy and outdoor free cold source to the maximum extent by setting different operation modes, realizes the annual operation of the air conditioning system, achieves the purpose of reducing the energy consumption of the whole air conditioning system, simultaneously combines the dry air energy evaporative refrigeration with the water-cooling direct expansion unit, can ensure the safety of the air conditioning system in the air conditioning area, and realizes the annual cold supply requirement of the air conditioning area, the invention determines the opening and closing of the evaporative refrigeration cold water supply device according to the outdoor meteorological conditions, simultaneously an exhaust fan of the evaporative refrigeration cold water supply device can be shared in winter and summer, the use requirement of different seasons can be realized only by opening and closing different air inlets, energy and water are fully saved, and the user side cold carrying medium of the invention runs in a closed cycle manner, thereby avoiding the influence of the low evaporative refrigeration water quality on the user side, and the user side cold carrying medium can be ethylene glycol solution or antifreeze, the freezing damage of the heat exchange coil during the operation in winter is avoided.
Drawings
FIG. 1 is a schematic process structure diagram of example 1 of the present invention.
FIG. 2 is a schematic view of the process structure of example 2 of the present invention.
FIG. 3 is a schematic view of the process structure of example 3 of the present invention.
FIG. 4 is a schematic diagram of the process structure of example 4 of the present invention.
FIG. 5 is a schematic process diagram of example 5 of the present invention.
FIG. 6 is a schematic diagram of the process structure of example 6 of the present invention.
FIG. 7 is a schematic process diagram of example 7 of the present invention.
FIG. 8 is a schematic process diagram of example 8 of the present invention.
FIG. 9 is a schematic view of the process structure of example 9 of the present invention.
FIG. 10 is a schematic diagram of the process structure of example 10 of the present invention.
FIG. 11 is a schematic view of the process structure of example 11 of the present invention.
FIG. 12 is a schematic view of the process structure of example 12 of the present invention.
FIG. 13 is a schematic view of the process structure of example 12 of the present invention.
FIG. 14 is a schematic view of the process structure of example 12 of the present invention.
FIG. 15 is a schematic process diagram of example 13 of the present invention.
FIG. 16 is a schematic view of the process structure of example 13 of the present invention.
FIG. 17 is a schematic view of the process structure of example 13 of the present invention.
FIG. 18 is a schematic process diagram of example 14 of the present invention.
FIG. 19 is a schematic view of the process structure of example 14 of the present invention.
FIG. 20 is a schematic view of the process structure of example 14 of the present invention.
The codes in the figures are respectively: 1 is a shell, 2 is an evaporative cooling water supply device, 3 is a first surface type heat exchanger, 4 is a plate type heat exchanger, 5 is a first user, 6 is a first exhaust fan, 7 is a second air inlet, 8 is a first pipeline, 9 is a second pipeline, 10 is a first water pump, 11 is a third pipeline, 12 is a fourth pipeline, 13 is a fifth pipeline, 14 is a second water pump, 15 is a first air inlet, 16 is a sixth pipeline, 17 is a seventh pipeline, 18 is an eighth pipeline, 19 is a first valve, 20 is a second valve, 21 is a third valve, 22 is a fourth valve, 23 is a fifth valve, 24 is a first guide cavity, 25 is a third air inlet, 26 is a second surface type heat exchanger, 27 is a second guide cavity, 28 is a fourth air inlet, 29 is a third guide cavity, 30 is a fifth air inlet, 31 is a third surface type heat exchanger, 32 is a sixth air inlet, 33 is a second exhaust fan, 34 is a ninth pipeline, 35 is a tenth pipeline, 36 is a sixth valve, 37 is a seventh valve, 38 is a first seal chamber, 39 is a second seal chamber, 40 is a fourth surface heat exchanger, 41 is a third exhaust fan, 42 is an eighth valve, 43 is a third seal chamber, 44 is a fourth seal chamber, 45 is a fifth surface heat exchanger, 46 is a fourth exhaust fan, 47 is a sixth surface heat exchanger, 48 is a fifth exhaust fan, 49 is a seventh surface heat exchanger, 50 is an evaporator, 51 is a condenser, 52 is a compressor, 53 is a throttle valve, 54 is a sixth exhaust fan, 55 is a return pipe, and 56 is a water supply pipe.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative positional relationship of the components is described according to the layout pattern of fig. 1 of the specification, such as: the positional relationship of up, down, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.
The invention is further described with reference to the following examples and figures:
embodiment 1, as shown in fig. 1, the water-saving type year round air conditioner is characterized by comprising a cold water supply device, a first surface type heat exchanger 3, a plate type heat exchanger 4 and a first user 5; the cold water supply device comprises a machine shell 1, an evaporative refrigeration cold water supply device 2 and a first exhaust fan 6, wherein the evaporative refrigeration cold water supply device 2 is arranged in the machine shell 1, a first exhaust port is arranged on the machine shell 1 above the evaporative refrigeration cold water supply device 2, the first exhaust fan 6 is arranged on the machine shell 1 corresponding to the first exhaust port, a second air inlet 7 is arranged on the machine shell 1 below the evaporative refrigeration cold water supply device 2, a primary water circulation channel and a secondary water circulation channel are arranged in the plate-type heat exchanger 4, a water outlet of the evaporative refrigeration cold water supply device 2 is communicated with an inlet of the primary water circulation channel through a first pipeline 8, a water inlet of the evaporative refrigeration cold water supply device 2 is communicated with an outlet of the primary water circulation channel through a second pipeline 9, a first water pump 10 is connected in series on the first pipeline 8, and a cooling water channel and a cold air channel are arranged in the first surface-type heat exchanger 3, the water outlet of the secondary water circulation channel is communicated with the inlet of the cooling water channel of the first surface type heat exchanger 3 through a third pipeline 11, the outlet of the cooling water channel of the first surface type heat exchanger 3 is communicated with the cold water inlet of the first user 5 through a fourth pipeline 12, the cold water outlet of the first user 5 is communicated with the water inlet of the secondary water circulation channel through a fifth pipeline 13, and a second water pump 14 is connected to the fifth pipeline 13 in series.
In the embodiment, the evaporation refrigeration cold water supply device 2 is a direct evaporation refrigeration cold water supply device or an indirect evaporation refrigeration cold water supply device, and when the evaporation refrigeration cold water supply device is an indirect evaporation refrigeration cold water supply device, the indirect evaporation refrigeration device can be a surface air cooler, an indirect evaporation cooler, a tubular, plate or plate-fin heat exchanger, and different water circulation processes are adopted, so that the water outlet temperature of the evaporation refrigeration cold water supply device 2 is lower, wherein the limit value of the water outlet temperature of the direct evaporation refrigeration cold water supply device is the temperature of an inlet air wet ball, the limit value of the water outlet temperature of the indirect evaporation refrigeration cold water supply device is the temperature of an inlet air dew point, the water outlet of the evaporation refrigeration cold water supply device 2 circulates at the primary side of the plate heat exchanger 4 to cool the secondary side cold carrying medium of the plate heat exchanger 4, and the cooled secondary side cold carrying medium is used for cooling the first user 5. The secondary side cold carrying medium of the plate heat exchanger 4 can be circulating water or glycol solution or other cold carrying medium, the first surface type heat exchanger 3 arranged on the secondary side of the plate heat exchanger 4 is mainly used for providing the cold carrying medium for cooling the first user 5 in winter, and the operation mode in winter is as follows: and closing the evaporative refrigeration cold water supply device 2, stopping the operation of the primary side of the plate type heat exchanger 4, and cooling the high-temperature cold carrying medium on the secondary side of the plate type heat exchanger 4 by outdoor low-temperature air in the first surface type heat exchanger 3 for cooling the user.
This embodiment of the invention has the following advantages: firstly, cold air or cold water can be provided for an air conditioning area needing year-round cooling; secondly, when the air conditioner runs in a transition season with lower temperature or in winter, the evaporative refrigeration cold water supply device 2 is closed, and the cold carrying medium is cooled only by the first surface type heat exchanger 3, so that the energy saving performance is remarkable; thirdly, the evaporative refrigeration cold water supply device 2 supplies cold water only for a period of time, and fully saves water on the basis of annual operation of the system; fourthly, the secondary side operates in a closed mode all the year round, and potential safety hazards caused by blockage of the coil pipe are avoided.
The first surface type heat exchanger 3 and the evaporative refrigeration cold water supply device 2 in the embodiment share one exhaust fan, in summer, the evaporative refrigeration cold water supply device 2 is used for preparing cold water for refrigeration of a user, the first air inlet 15 is closed, the second air inlet 7 is opened, in a transition season or in winter, the first air inlet 15 is opened, the second air inlet 7 is closed, and low-temperature cold carrying media required by the user are cooled by utilizing air with lower outdoor temperature.
In this embodiment, the first surface heat exchanger 3 is disposed on the second air inlet 7, and the system operates all the year round by switching the valve, in a first operating mode: the first valve 19, the third valve 21 and the fifth valve 23 are opened, the second valve 20 and the fourth valve 22 are closed, the evaporative refrigeration cold water supply device 2 prepares cold water, a part of cold water on the primary side of the plate heat exchanger 4 is used for pre-cooling air of the first surface heat exchanger 3, so that the water outlet temperature of the evaporative refrigeration cold water supply device 2 is lower, a part of cold water is used for cooling a cold carrying medium on the secondary side of the plate heat exchanger 4, and the cooled cold carrying medium meets the refrigeration requirement of the first user 5 on the secondary side of the plate heat exchanger 4; and a second operation mode: the first valve 19, the third valve 21 and the fifth valve 23 are closed, the second valve 20 and the fourth valve 22 are opened, the evaporative cooling cold water supply device 2 does not produce cold water any more, the primary side of the plate heat exchanger 4 stops running, the exhaust fan of the evaporative cooling cold water supply device 2 is opened, and outdoor low-temperature air cools the cold-carrying medium for the first user 5 through the first surface heat exchanger 3.
In this embodiment, when the first surface heat exchanger 3 is disposed at the second air inlet 7, the outdoor air must pass through the evaporative cooling cold water supply device 2 to be discharged to the outside of the room by the exhaust fan under the winter condition, but the evaporative cooling cold water supply device does not perform a heat exchange function under the winter condition, so that the third air inlet 25 is disposed, the second air inlet 7 is closed under the winter condition, and the outdoor air passes through the first surface heat exchanger 3 to cool the cold-carrying medium required by the first user 5 side and then passes through the third air inlet 25 and the first air inlet 15 to be discharged by the exhaust fan.
In this embodiment, the fourth air inlet 28 and the fifth air inlet 30 are disposed at the outdoor air inlets of the first surface heat exchanger 3 and the second surface heat exchanger 26, under the working condition of summer, the outdoor air quantity required for preparing cold water by the evaporative refrigeration cold water supply device 3 is small, at this time, the fifth air inlet 30, the third air inlet 25 and the first air inlet 15 can be closed, the outdoor air is exhausted by the exhaust fan after passing through the fourth air inlet 28 and the second air inlet 7 for heat exchange, under the working condition of winter, the resistance of the system is smaller than that under the working condition of summer, so that the fourth air inlet 28 and the fifth air inlet 30 can be simultaneously opened, the outdoor cold air quantity passing through the first surface heat exchanger 3 and the second surface heat exchanger 26 for heat exchange is large, and the heat exchange efficiency of the cold medium carried by the first user 5 side and the outdoor cold air is improved.
In this embodiment, a second exhaust fan 33 and a third surface heat exchanger 31 are disposed on one side of the evaporative cooling water supply device 2, and are used for cooling the first user 5 directly by the cold carrying medium cooled by the first surface heat exchanger 3 under the working condition in winter, the temperature is higher, at this time, under the effect of the second exhaust fan 33, the cold carrying medium can be forced to cool again by the third surface heat exchanger 31, and the operation mode is one: the evaporative refrigeration cold water supply device 2 is opened, the second air inlet 7 is opened, the first valve 19, the third valve 21 and the fifth valve 23 are opened, and the evaporative refrigeration cold water supply device 2 supplies cold water to the secondary side of the plate heat exchanger 4 and the first surface heat exchanger 3; and a second operation mode: the second valve 20, the sixth valve 26 and the seventh valve 37 are opened, other valves are closed, the first air inlet 15, the third air inlet 25 and the sixth air inlet 32 are opened, the two exhaust fans are opened, and the cold-carrying medium on the first user 5 side is cooled through the first surface type heat exchanger 3 and the third surface type heat exchanger 31 in sequence; and (3) operation mode III: the second valve 20 and the fourth valve 22 are opened, the other valves are closed, the first air inlet 15 and the third air inlet 25 are opened, and the cooling medium on the first user 5 side is cooled by the first surface heat exchanger 3.
Embodiment 7, as an optimization of embodiment 3, as shown in fig. 7, a first sealed cavity 38 communicated with the first air inlet 15 and the second air inlet 7 is provided outside the housing 1 corresponding to the first air inlet 15 and the second air inlet 7, a second sealed cavity 39 is further provided outside the first sealed cavity 38, the first surface heat exchanger 3 is mounted on the first sealed cavity 38, a cold air channel of the first surface heat exchanger 3 is communicated with the inside of the first sealed cavity 38, a fourth surface heat exchanger 40 and a third air outlet are further provided on the second sealed cavity 39, a cold air channel of the fourth surface heat exchanger 40 is communicated with the inside of the second sealed cavity 39, a third air outlet is provided with a third air exhaust fan 41, a cooling water channel and a cold air channel are provided in the fourth surface heat exchanger 40, the cold air channel of the fourth surface heat exchanger 40 is communicated with the inside of the second sealed cavity 39, a fourth pipeline 12 between the eighth pipeline 18 and the fourth valve 22 is communicated with the inlet and the outlet of the cooling water channel in the fourth surface type heat exchanger 40, and an eighth valve 42 is connected in series on the fourth pipeline 12 between the eighth pipeline 18 and the fourth surface type heat exchanger 40.
The present embodiment has two operation modes: the first operation mode is as follows: the evaporative refrigeration cold water supply device 2 is opened, the second air inlet 7 is opened, the first air inlet 15 is opened, the third exhaust fan 41 is closed, the first valve 19, the third valve 21 and the fifth valve 23 are opened, and the evaporative refrigeration cold water supply device 2 supplies cold water to the secondary side of the plate heat exchanger 4 and the first surface type heat exchanger 3; and a second operation mode: the second valve 20, the eighth valve 42 and the fourth valve 22 are opened, other valves are closed, the second air inlet 7 is closed, the first air inlet 15 is opened, the two exhaust fans are opened, and the cooling medium carried by the first user 5 side sequentially passes through the first surface type heat exchanger 3 and the fourth surface type heat exchanger 40 to be cooled.
In the embodiment, a first surface heat exchanger 3 is arranged on a first air inlet 15 of the evaporative cooling cold water supply device 2 and is used for cooling cold-carrying media by using outdoor low-temperature air under the working condition in winter; the fifth surface type heat exchanger 45 is arranged on the second air inlet 7 at the lower part of the evaporative refrigeration cold water supply device 2 and used for precooling outdoor high-temperature air under the working condition in summer, and the surface type heat exchangers in winter and summer are separately arranged, so that the safety is high.
When the embodiment is used in a transition season or in winter, when the cold quantity provided by the air quantity of the evaporative refrigeration cold water supply device 2 cannot be completely matched with the cold quantity required by a user, the first surface type heat exchanger 3 cannot effectively cool the cold-carrying medium through outdoor low-temperature air, and at the moment, the heat exchange unit is arranged on the secondary side of the plate type heat exchanger 4 to assist in cooling the cold-carrying medium, so that the effective cooling is achieved.
Embodiment 12, as an optimization of embodiment 1, embodiment 10, or embodiment 11, as shown in fig. 12, 13, and 14, the first user 5 includes a seventh surface heat exchanger 49 and a water-cooling direct expansion unit, the water-cooling direct expansion unit includes an evaporator 50, a condenser 51, a compressor 52, and a throttle valve 53, a cooling water channel and a cold air channel are disposed in the seventh surface heat exchanger 49, a cooling medium channel and a cold air channel are disposed in the evaporator 50, a cooling medium channel and a cooling water channel are disposed in the condenser 51, the cold air channel of the seventh surface heat exchanger 49 is communicated with the cold air channel of the evaporator 50, a sixth exhaust fan 54 is disposed at an outlet of the cold air channel of the evaporator 50, an outlet of the cooling medium channel of the evaporator 50 is communicated with an inlet of the cooling medium channel of the condenser 51 through the compressor 52, an inlet of the cooling medium channel of the evaporator 50 is communicated with an outlet of the cooling medium channel of the condenser 51 through the throttle valve 53, the outlet of the cooling water passage of the seventh surface heat exchanger 49 is communicated with the inlet of the cooling water passage of the condenser 51, the outlet of the fourth line 12 is communicated with the inlet of the cooling water passage of the seventh surface heat exchanger 49, and the inlet of the fifth line 13 is communicated with the outlet of the cooling water passage of the condenser 51.
This embodiment is provided with water-cooling directly expands the unit, and the operational mode is as follows: in summer: cold water prepared by the evaporative refrigeration cold water supply device 2 circulates at the primary side of the plate type heat exchanger 4, cold-carrying media at the secondary side of the plate type heat exchanger 4 firstly pass through the first surface type heat exchanger 3, then pass through the condenser 51 for further temperature rise and then circulate in sequence, high-temperature air is firstly precooled by the first surface type heat exchanger 3, and then pass through the evaporator 50 for further temperature reduction and is used for supplying cold for secondary users, and the operation mode provides cold air for the secondary users; in transition seasons or winter, the evaporative refrigeration cold water supply device 2 is closed, the primary side of the plate heat exchanger 4 stops running, cold-carrying media are cooled by the first surface type heat exchanger 3 and then sequentially pass through the seventh surface type heat exchanger 49 and the condenser 51, high-temperature air is pre-cooled by the first surface type heat exchanger 3 and then is used for cooling secondary users after being further cooled by the evaporator 50, and the running mode provides cold air for the secondary users; the water-cooling direct expansion unit is arranged and has the function that when the cold water prepared by the cold water supply device 2 for evaporative refrigeration in summer is higher, or the heat exchange unit in winter can not effectively cool the cold carrying medium, and the cold carrying medium can not meet the air supply temperature requirement of a secondary user, the water-cooling direct expansion unit can be started. The fourth exhaust fan 46 is arranged on the first surface type heat exchanger 3 in the embodiment, the fourth exhaust fan 46 and the first surface type heat exchanger 3 form a heat exchange unit, forced heat exchange is realized by outdoor cold air and cold media carried by a user side in winter, the heat exchange efficiency is high, and meanwhile, a mechanical refrigerating device is arranged, so that the whole-year safe and reliable operation of the system is realized. The secondary users can be users who need to be cooled by cold air, such as a data center processing machine room. The mechanical form shown in fig. 14 can provide cold air at a lower temperature to the secondary user.
Embodiment 14, as an optimization of embodiment 1, embodiment 10 or embodiment 11, as shown in fig. 18, 19 and 20, the first user 5 is a heat exchange unit and a water-cooling direct expansion unit, the heat exchange unit includes a sixth surface type heat exchanger 47 and a fifth exhaust fan 48, a cooling water channel and a cool air channel are disposed in the sixth surface type heat exchanger 47, the water-cooling direct expansion unit includes an evaporator 50, a condenser 51, a compressor 52 and a throttle valve 53, a refrigerant channel and a cool water channel are disposed in the evaporator 50, a refrigerant channel and a cooling water channel are disposed in the condenser 51, an outlet of the refrigerant channel of the evaporator 50 is communicated with an inlet of the refrigerant channel of the condenser 51 through the compressor 52, an inlet of the refrigerant channel of the evaporator 50 is communicated with an outlet of the refrigerant channel of the condenser 51 through the throttle valve 53, an outlet of the fourth pipeline 12 is communicated with an inlet of the cooling water channel of the sixth surface type heat exchanger 47, an inlet of the fifth line 13 is communicated with a cooling water passage outlet of the condenser 51, a return pipe 55 is communicated with a cold water passage inlet of the evaporator 50, and a water supply pipe 56 is communicated with a cold water passage outlet of the evaporator 50.
When the system provides cold air and cold water for users at the same time, the sixth surface heat exchanger 47 cools the low-temperature air after the high-temperature air is cooled by the cold carrier for refrigerating the secondary users, the cold carrier enters the evaporator 50 after passing through the condenser 51 of the water-cooling direct expansion unit for further cooling, the cold water can be provided for the tertiary users, and the first surface heat exchanger 3 is used for cooling the cold carrier in winter.
The invention well overcomes the problems of annual operation and large water consumption of evaporative refrigeration of the air conditioning system, and in the form of the air conditioning system, the evaporative refrigeration cold water supply device is started in summer, outdoor dry hot air is reasonably used for preparing cold water for users of air conditioners, and in winter or transition seasons, air with lower outdoor temperature is used for cooling cold carrying media for the users of the air conditioners; according to different use requirements, the air inlets of the evaporative refrigeration cold water supply devices are switched to realize the application of the system under different seasonal conditions, the evaporative refrigeration cold water supply device is only opened when outdoor meteorological conditions are suitable for evaporative refrigeration technology, and when the outdoor air wet bulb temperature is high in summer and the requirements on temperature and humidity of users cannot be met only by the evaporative refrigeration technology, the water-cooling direct expansion unit can be assisted to further cool the cold water or cold air for users of air conditioners.
According to the invention, by setting different operation modes, dry air energy and an outdoor free cold source can be utilized to the maximum extent; the invention achieves the purpose of reducing the energy consumption of the whole air conditioning system, and simultaneously combines the dry air energy evaporative refrigeration and the water-cooling direct expansion unit, thereby ensuring the safety of the air conditioning system in the air conditioning area and realizing the annual cooling requirement of the air conditioning area.
The technical characteristics form the embodiment of the invention, the embodiment has strong adaptability and implementation effect, and unnecessary technical characteristics can be increased or decreased according to actual requirements to meet the requirements of different situations.
Claims (10)
1. A water-saving all-year-round operation air conditioning device is characterized by comprising a cold water supply device, a first surface type heat exchanger, a plate type heat exchanger and a first user; the cold water supply device comprises a machine shell, an evaporative refrigeration cold water supply device and a first exhaust fan, wherein the evaporative refrigeration cold water supply device is arranged in the machine shell, a first exhaust port is arranged on the machine shell above the evaporative refrigeration cold water supply device, the first exhaust fan is arranged on the machine shell corresponding to the first exhaust port, a second air inlet is arranged on the machine shell below the evaporative refrigeration cold water supply device, a primary water circulation channel and a secondary water circulation channel are arranged in the plate heat exchanger, a water outlet of the evaporative refrigeration cold water supply device is communicated with an inlet of the primary water circulation channel through a first pipeline, a water inlet of the evaporative refrigeration cold water supply device is communicated with an outlet of the primary water circulation channel through a second pipeline, a first water pump is connected in series on the first pipeline, a cooling water channel and a cold air channel are arranged in the first surface heat exchanger, a water outlet of the secondary water circulation channel is communicated with an inlet of the cooling water channel of the first surface heat exchanger through a third pipeline, the outlet of the cooling water channel of the first surface type heat exchanger is communicated with the cold water inlet of a first user through a fourth pipeline, the cold water outlet of the first user is communicated with the water inlet of the secondary water circulation channel through a fifth pipeline, a second water pump is connected in series on the fifth pipeline, a first air inlet is arranged on the shell between the first exhaust fan and the evaporative refrigeration cold water supply device, the cold air channel of the first surface type heat exchanger is communicated with the first air inlet, the cold air channel outlet of the first surface type heat exchanger is communicated with the second air inlet, a sixth pipeline is communicated between the third pipeline and the fourth pipeline, a seventh pipeline is communicated between the first pipeline and the third pipeline between the first water pump and the plate type heat exchanger, an eighth pipeline is communicated between the fourth pipeline between the first surface type heat exchanger and the sixth pipeline and the water inlet of the evaporative refrigeration cold water supply device, a first valve is connected in series on the seventh pipeline, a second valve is connected in series with a third pipeline between the sixth pipeline and the seventh pipeline, a third valve is connected in series with the sixth pipeline, a fourth valve is connected in series with a fourth pipeline between the sixth pipeline and the eighth pipeline, and a fifth valve is connected in series with the eighth pipeline.
2. A water-saving year round air conditioner according to claim 1, wherein a first guide chamber is provided outside the housing corresponding to the first air inlet, a third air inlet is provided on the first guide chamber, and the cold air passage outlet of the first surface heat exchanger is respectively communicated with the second air inlet and the third air inlet.
3. A water-saving year round air conditioning unit according to claim 2, further comprising a second surface heat exchanger having a cooling water passage and a cold air passage therein, a fourth line between the first surface heat exchanger and the eighth line being connected to the cooling water passage in the second surface heat exchanger, the cooling water passage in the first surface heat exchanger being connected in series to the cooling water passage in the second surface heat exchanger, the second surface heat exchanger being arranged in parallel and in the same direction as the cold air passage of the first surface heat exchanger, the cold air passage outlet of the second surface heat exchanger, the second air inlet and the third air inlet being connected, a second guide chamber being provided on the cold air passage inlet corresponding to the first surface heat exchanger, and a fourth air inlet being provided on the second guide chamber, and a third guide cavity is arranged on the cold air channel inlet corresponding to the second surface type heat exchanger, and a fifth air inlet is arranged on the third guide cavity.
4. A water-saving annual operation air conditioning device according to claim 2, further comprising a third surface heat exchanger, wherein the first guide chamber is further provided with a sixth air inlet and a second air outlet, the third surface heat exchanger is provided with a cooling water passage and a cooling air passage, the cooling air passage of the third surface heat exchanger is communicated with the sixth air inlet, the second air outlet is provided with a second exhaust fan, a fourth pipeline between the eighth pipeline and the fourth valve is communicated with an inlet of the cooling water passage in the third surface heat exchanger through a ninth pipeline, a fourth pipeline between the fourth valve and the first user is communicated with an outlet of the cooling water passage in the third surface heat exchanger through a tenth pipeline, the ninth pipeline is connected in series with the sixth valve, and the tenth pipeline is connected in series with the seventh valve.
5. A water-saving year round operation air conditioner according to claim 1, wherein a first sealed chamber communicated with the first air inlet and the second air inlet is provided outside the cabinet corresponding to the first air inlet and the second air inlet, a second sealed chamber is provided outside the first sealed chamber, the first surface heat exchanger is mounted on the first sealed chamber, the cool air passage of the first surface heat exchanger is communicated with the first sealed chamber, a fourth surface heat exchanger and a third air outlet are provided on the second sealed chamber, the cool air passage of the fourth surface heat exchanger is communicated with the second sealed chamber, a third air outlet is provided at the third air outlet, a cooling water passage and a cool air passage are provided in the fourth surface heat exchanger, a fourth pipeline between the eighth pipeline and the fourth valve is communicated with an inlet and an outlet of the cooling water passage in the fourth surface heat exchanger, and an eighth valve is connected in series on the fourth pipeline between the eighth pipeline and the fourth surface type heat exchanger.
6. A water-saving year round air conditioning unit according to claim 1, wherein a third sealed chamber communicated with the first air inlet and the second air inlet is provided outside the casing corresponding to the first air inlet and the second air inlet, a fourth sealed chamber is further provided outside the third sealed chamber, the first surface heat exchanger is mounted on the third sealed chamber, the cold air passage of the first surface heat exchanger is communicated with the inside of the third sealed chamber, a fourth surface heat exchanger and a third air outlet are further provided on the fourth sealed chamber, a third air exhaust fan is provided at the third air outlet, a cooling water passage and a cold air passage are provided in the fourth surface heat exchanger, the cold air passage of the fourth surface heat exchanger is communicated with the inside of the fourth sealed chamber, a fourth pipeline between the first surface heat exchanger and the eighth pipeline is communicated with an inlet and an outlet of the cooling water passage in the fourth surface heat exchanger, the cooling water channels of the first surface type heat exchanger and the fourth surface type heat exchanger are arranged in series.
7. A water-saving year round air conditioning apparatus according to claim 1, wherein the third pipeline or the fourth pipeline is provided with a second heat exchange unit, the second heat exchange unit includes a sixth surface type heat exchanger having a cooling water passage and a cool air passage therein, and a fifth exhaust fan provided at an outlet or an inlet of the cool air passage of the sixth surface type heat exchanger.
8. A water-saving type year round operation air conditioning device as claimed in claim 1, wherein the first user includes a seventh surface type heat exchanger and a water-cooling type direct expansion unit, the water-cooling type direct expansion unit includes an evaporator, a condenser, a compressor and a throttle valve, a cooling water passage and a cold air passage are provided in the seventh surface type heat exchanger, a cooling medium passage and a cold air passage are provided in the evaporator, a cooling medium passage and a cooling water passage are provided in the condenser, the cold air passage of the seventh surface type heat exchanger is communicated with the cold air passage of the evaporator, a sixth exhaust fan is provided at an outlet of the cold air passage of the evaporator, an outlet of the cooling medium passage of the evaporator is communicated with an inlet of the cooling medium passage of the condenser through the compressor, an inlet of the cooling medium passage of the evaporator is communicated with an outlet of the cooling medium passage of the condenser through the throttle valve, and an outlet of the cooling water passage of the seventh surface type heat exchanger is communicated with an inlet of the cooling water passage of the condenser, an outlet of the fourth pipeline is communicated with an inlet of a cooling water channel of the seventh surface type heat exchanger, and an inlet of the fifth pipeline is communicated with an outlet of the cooling water channel of the condenser.
9. A water-saving annual operation air conditioning unit according to claim 1, further comprising a water-cooling direct expansion unit, wherein the water-cooling direct expansion unit comprises an evaporator, a condenser, a compressor and a throttle valve, a refrigerant channel and a cold water channel are arranged in the evaporator, a refrigerant channel and a cooling water channel are arranged in the condenser, a fourth pipeline close to a user side is communicated with an inlet and an outlet of the cold water channel of the evaporator, a fifth pipeline is communicated with an inlet and an outlet of the cooling water channel of the condenser, an outlet of the refrigerant channel of the evaporator is communicated with an inlet of the refrigerant channel of the condenser through the compressor, and an inlet of the refrigerant channel of the evaporator is communicated with an outlet of the refrigerant channel of the condenser through the throttle valve.
10. A water-saving year round air conditioner according to claim 1, wherein the first user is a heat exchange unit and a water-cooling direct expansion unit, the heat exchange unit includes a sixth surface heat exchanger and a fifth exhaust fan, the sixth surface heat exchanger is provided with a cooling water passage and a cooling air passage, the water-cooling direct expansion unit includes an evaporator, a condenser, a compressor and a throttle valve, the evaporator is provided with a cooling medium passage and a cooling water passage, the condenser is provided with a cooling medium passage and a cooling water passage, an outlet of the cooling medium passage of the evaporator is connected to an inlet of the cooling medium passage of the condenser through the compressor, an inlet of the cooling medium passage of the evaporator is connected to an outlet of the cooling medium passage of the condenser through the throttle valve, an outlet of the fourth pipe is connected to an inlet of the cooling water passage of the sixth surface heat exchanger, and an inlet of the fifth pipe is connected to an outlet of the cooling water passage of the condenser, the inlet of the cold water channel of the evaporator is communicated with a water return pipe, and the outlet of the cold water channel of the evaporator is communicated with a water supply pipe.
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