CN111988962A - Heat exchange device and heat exchange method for exchanging heat for cabinet air conditioner - Google Patents
Heat exchange device and heat exchange method for exchanging heat for cabinet air conditioner Download PDFInfo
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- CN111988962A CN111988962A CN202010845814.0A CN202010845814A CN111988962A CN 111988962 A CN111988962 A CN 111988962A CN 202010845814 A CN202010845814 A CN 202010845814A CN 111988962 A CN111988962 A CN 111988962A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 379
- 238000005057 refrigeration Methods 0.000 claims abstract description 26
- 239000003507 refrigerant Substances 0.000 claims abstract description 24
- 230000001502 supplementing effect Effects 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 3
- 239000003814 drug Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 230000003020 moisturizing effect Effects 0.000 description 8
- 238000004378 air conditioning Methods 0.000 description 5
- 239000008399 tap water Substances 0.000 description 5
- 235000020679 tap water Nutrition 0.000 description 4
- 239000012535 impurity Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
- H05K7/208—Liquid cooling with phase change
- H05K7/20827—Liquid cooling with phase change within rooms for removing heat from cabinets, e.g. air conditioning devices
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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
-
- 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
- F24F5/0017—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 cold storage bodies, e.g. ice
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
- H05K7/20836—Thermal management, e.g. server temperature control
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Abstract
The invention belongs to the technical field of heat exchange of cabinet air conditioners, and discloses a heat exchange device and a heat exchange method for exchanging heat for a cabinet air conditioner, wherein the heat exchange device comprises a refrigeration unit for exchanging heat for a refrigerant of the cabinet air conditioner; the refrigerating unit comprises a water chilling unit, a heat exchange water pump and a heat exchanger; a first water outlet pipe of the cabinet air conditioner is sequentially connected with the heat exchanger and the water chilling unit through a heat exchange water pump; a second heat exchange water outlet pipe of the water chilling unit is connected with a first water inlet pipe of the cabinet air conditioner; a first heat exchange water outlet pipe of the heat exchanger is connected with a second heat exchange water inlet pipe of the water chilling unit through a first branch pipe; a first heat exchange water inlet pipe of the heat exchanger is connected with a second heat exchange water outlet pipe of the water chilling unit through a second branch pipe; the first branch pipe is provided with a first flow control valve and a third flow control valve, and the second branch pipe is provided with a second flow control valve and a fourth flow control valve. When the heat exchange device and the heat exchange method are used, a proper heat exchange mode can be selected according to the outdoor wet bulb temperature.
Description
Technical Field
The invention belongs to the technical field of cabinet air conditioner heat exchange, and particularly relates to a heat exchange device and a heat exchange method for a cabinet air conditioner.
Background
The heat exchange mode of the refrigerant of the existing cabinet air conditioner usually adopts a single heat exchange mode, and a proper heat exchange mode cannot be selected according to actual needs (such as outdoor temperature).
Disclosure of Invention
In order to solve the above problems in the prior art, the present invention aims to provide a heat exchange device and a heat exchange method for exchanging heat for a cabinet air conditioner.
The technical scheme adopted by the invention is as follows:
a heat exchange device for exchanging heat for a cabinet air conditioner comprises a refrigeration unit for exchanging heat for a refrigerant of the cabinet air conditioner;
the refrigeration unit comprises a water chilling unit, a heat exchange water pump and a heat exchanger;
a first water outlet pipe of the cabinet air conditioner is sequentially connected with the heat exchanger and the water chilling unit through the heat exchange water pump;
a second heat exchange water outlet pipe of the water chilling unit is connected with a first water inlet pipe of the cabinet air conditioner;
a first heat exchange water outlet pipe of the heat exchanger is connected with a second heat exchange water inlet pipe of the water chilling unit through a first branch pipe;
a first heat exchange water inlet pipe of the heat exchanger is connected with a second heat exchange water outlet pipe of the water chilling unit through a second branch pipe;
the first branch pipe is connected with the second branch pipe through a third branch pipe;
the first branch pipe is provided with a first flow control valve and a third flow control valve, and the second branch pipe is provided with a second flow control valve and a fourth flow control valve;
one end of the third branch pipe is positioned between the first flow control valve and the third flow control valve;
the other end of the third branch pipe is positioned between the second flow control valve and the fourth flow control valve.
Furthermore, a first water outlet pipe of the cabinet air conditioner is connected with the heat exchange water pump through an air conditioner water outlet return pipe.
Furthermore, a second heat exchange water outlet pipe of the water chilling unit is connected with a first water inlet pipe of the cabinet air conditioner through an air conditioner water inlet return pipe.
Furthermore, the number of the cabinet air conditioners is two, the number of the refrigeration units is four, and the first water outlet pipes of the two cabinet air conditioners are connected with the air conditioner water outlet return pipe;
and the second heat exchange water outlet pipes of the water chilling units of the four groups of refrigeration units are connected with the air conditioner water inlet return pipe.
Further, still include cold storage tank, cold storage tank's second inlet tube with the air conditioner return pipe that intakes is connected, cold storage tank's second outlet pipe with the first water piping connection of rack air conditioner.
Furthermore, the air conditioner further comprises an automatic constant-pressure water supplementing and exhausting device, and the automatic constant-pressure water supplementing and exhausting device is connected with the air conditioner water outlet return pipe through a water supplementing pump.
Further, the automatic constant-pressure water supplementing and exhausting device comprises a water storage tank, a water filter group and an automatic medicine adding device for adding medicine into the water filter group;
the outlet of the water filter group is connected with the water storage tank, and the water storage tank is connected with the air conditioner water outlet return pipe through the water replenishing pump.
Further, the water filter group comprises two water filters.
Further, the water filter is a side-filtering water filter.
The invention also discloses a heat exchange method for exchanging heat by using the heat exchange device, which comprises the following steps:
when the outdoor wet bulb temperature is higher than 15 ℃, closing the first flow control valve and the fourth flow control valve, opening the second flow control valve and the third flow control valve, and then starting the heat exchange water pump and the water chilling unit;
or when the outdoor wet bulb temperature is less than or equal to 8 ℃, closing the second flow control valve and the third flow control valve, opening the first flow control valve and the fourth flow control valve, and then starting the heat exchange water pump and the heat exchanger;
or when the outdoor wet bulb temperature is higher than 8 ℃ and lower than or equal to 15 ℃, opening the first flow control valve and the fourth flow control valve, opening the second flow control valve and the third flow control valve, and then starting the heat exchange water pump, the heat exchanger and the water chilling unit, wherein the first flow control valve and the fourth flow control valve have the same opening degree, the second flow control valve and the third flow control valve have the same opening degree, and the outlet flow of the heat exchange water pump is equal to the sum of the inlet flows of the first flow control valve and the second flow control valve.
The invention has the beneficial effects that:
when the heat exchange device and the heat exchange method for exchanging heat for the cabinet air conditioner are used, a proper heat exchange mode (a first heat exchange mode, a second heat exchange mode or a third heat exchange mode) can be selected according to the outdoor wet bulb temperature, and comprehensively, the heat exchange effect can be ensured, and meanwhile, the effect of saving more energy is achieved.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a partial structural schematic view of fig. 1 (i.e., an enlarged schematic view of a refrigeration unit).
Fig. 3 is a partial structural view of fig. 1 (i.e., an enlarged view of the automatic constant pressure water replenishing and air discharging device).
In the figure: 10-cabinet air conditioning; 11-a first water inlet pipe; 12-a first water outlet pipe; 13-air conditioner water inlet return pipe; 14-air conditioner water outlet return pipe; 20-a refrigeration unit; 21-a water chilling unit; 211-a second heat exchange water inlet pipe; 212-a second heat exchange water outlet pipe; 22-heat exchange water pump; 23-a heat exchanger; 231-a first heat exchange water inlet pipe; 232-a first heat exchange water outlet pipe; 24-a first branch; 25-a second manifold; 26-a third branch; 271-a first flow control valve; 272-a second flow control valve; 273-third flow control valve; 274-a fourth flow control valve; 30-cold storage tank; 31-a second inlet pipe; 32-a second water outlet pipe; 40-automatic constant pressure water replenishing and exhausting device; 41-water replenishing pump; 42-a water storage tank; 43-water supply pipe; 44-a water drain pipe; 45-water filter; 46-automatic dosing device; 47-tap water pipe.
Detailed Description
The invention is further explained below with reference to the drawings and the specific embodiments.
Example 1:
as shown in fig. 1 and 2, a heat exchange device for exchanging heat for a cabinet air conditioner in the present embodiment includes a refrigeration unit 20 for exchanging heat for a refrigerant of a cabinet air conditioner 10; the refrigeration unit 20 comprises a water chilling unit 21, a heat exchange water pump 22 and a heat exchanger 23. Wherein, the water chilling unit 21 is a centrifugal water chilling unit, and the heat exchanger 23 is a plate heat exchanger.
The first water outlet pipe 12 of the cabinet air conditioner 10 is sequentially connected with the heat exchanger 23 and the water chilling unit 21 through the heat exchange water pump 22. The refrigerant of the cabinet air conditioner 10 is water, and the use environment of the cabinet air conditioner 10 is cooled by heat exchange between the water and the air in the use environment of the cabinet air conditioner 10.
Water (refrigerant) from the first water outlet pipe 12 of the cabinet air conditioner 10 is pumped to the water chilling unit 21 and/or the heat exchanger 23 through the heat exchange water pump 22 for heat exchange, and the second heat exchange water outlet pipe 212 of the water chilling unit 21 is connected with the first water inlet pipe 11 of the cabinet air conditioner 10. The water after heat exchange by the supercooled water unit 21 and/or the heat exchanger 23 is returned to the first water inlet pipe 11 of the cabinet air conditioner 10 through the second heat exchange water outlet pipe 212 of the supercooled water unit 21 (power is from the heat exchange water pump 22); the water after heat exchange through the cold water unit 21 and/or the heat exchanger 23 can also be pumped to the first water inlet pipe 11 of the cabinet air conditioner 10 through another heat exchange water pump 22; the heat exchange between the water after heat exchange and the air in the use environment of the cabinet air conditioner 10 is facilitated, and the refrigeration of the cabinet air conditioner 10 is further realized; this forms a heat exchange cycle of the refrigerant of the cabinet air conditioner 10.
As shown in fig. 2, a first heat exchange water outlet pipe 232 of the heat exchanger 23 is connected with a second heat exchange water inlet pipe 211 of the water chilling unit 21 through a first branch pipe 24; a first heat exchange water inlet pipe 231 of the heat exchanger 23 is connected with a second heat exchange water outlet pipe 212 of the water chilling unit 21 through a second branch pipe 25; the first branch pipe 24 and the second branch pipe 25 are connected through a third branch pipe 26; a first flow control valve 271 and a third flow control valve 273 are arranged on the first branch pipe 24, and a second flow control valve 272 and a fourth flow control valve 274 are arranged on the second branch pipe 25; one end of the third branch pipe 26 is located between the first flow control valve 271 and the third flow control valve 273; the other end of the third branch pipe 26 is located between the second flow control valve 272 and the fourth flow control valve 274.
The heat exchange method for exchanging heat by using the heat exchange device is as follows:
the first heat exchange mode: when the outdoor wet bulb temperature is higher than 15 ℃, the first flow control valve 271 and the fourth flow control valve 274 are closed, the second flow control valve 272 and the third flow control valve 273 are opened, and then the heat exchange water pump 22 and the water chilling unit 21 are started, so that water coming out of the first water outlet pipe 12 of the cabinet air conditioner 10 sequentially passes through the first heat exchange water inlet pipe 231, the second branch pipe 25, the third branch pipe 26, the first branch pipe 24 and the second heat exchange water inlet pipe 211 through the heat exchange water pump 22 and enters the water chilling unit 21 for heat exchange (at this time, the water chilling unit 21 works, but the heat exchanger 23 does not work), and the water after heat exchange returns to the first water inlet pipe 11 of the cabinet air conditioner 10 through the second heat exchange water outlet pipe 212. In the heat exchange mode, the refrigerant (water) of the cabinet air conditioner 10 is subjected to heat exchange only through the cold water unit 21, so that the cabinet air conditioner 10 is conveniently cooled. In the process, the outdoor wet bulb temperature is higher, and the heat exchange is only carried out through the cold water unit 21, so that the heat exchange effect is better.
Or the second heat exchange mode: when the outdoor wet bulb temperature is less than or equal to 8 ℃, closing the second flow control valve 272 and the third flow control valve 273, opening the first flow control valve 271 and the fourth flow control valve 274, then starting the heat exchange water pump 22 and the heat exchanger 23, so that water coming out of the first water outlet pipe 12 of the cabinet air conditioner 10 is pumped to the heat exchanger 23 through the heat exchange water pump 22 for heat exchange (at this time, the heat exchanger 23 works, but the water chilling unit 21 does not work), and the water after heat exchange sequentially passes through the first heat exchange water outlet pipe 232, the first branch pipe 24, the third branch pipe 26 and the second branch pipe 25, then flows into the second heat exchange water outlet pipe 212, and finally returns to the first water inlet pipe 11 of the cabinet air conditioner 10; in the heat exchange mode, the heat exchange is performed only on the refrigerant (water) of the cabinet air conditioner 10 through the heat exchanger 23, so that the refrigeration of the cabinet air conditioner 10 is facilitated. In the process, the outdoor wet bulb temperature is low, heat exchange is carried out only through the heat exchanger 23, and energy is saved.
Or the third heat exchange mode: when the outdoor wet bulb temperature is greater than 8 ℃ and less than or equal to 15 ℃, opening the first flow control valve 271 and the fourth flow control valve 274, opening the second flow control valve 272 and the third flow control valve 273, and then starting the heat exchange water pump 22, the heat exchanger 23 and the water chilling unit 21, wherein the first flow control valve 271 and the fourth flow control valve 274 have the same opening degree, the second flow control valve 272 and the third flow control valve 273 have the same opening degree, and the outlet flow of the heat exchange water pump 22 is equal to the sum of the inlet flows of the first flow control valve 271 and the second flow control valve 272. In this case, the water from the first water outlet pipe 12 of the rack air conditioner 10 is pumped to the first heat exchange water inlet pipe 231 by the heat exchange water pump 22 to form two branches, wherein one branch sequentially passes through the second branch pipe 25, the third branch pipe 26, the first branch pipe 24 and the second heat exchange water inlet pipe 211 to enter the chiller unit 21 for heat exchange; the other branch pump is used for pumping the water to the heat exchanger 23 for heat exchange, and the water after heat exchange sequentially passes through the first heat exchange water outlet pipe 232, the first branch pipe 24, the third branch pipe 26 and the second branch pipe 25; and finally, the two branches are converged in the second heat exchange water outlet pipe 212 and then returned to the first water inlet pipe 11 of the cabinet air conditioner 10. In the heat exchange mode, the heat exchanger 23 and the water chilling unit 21 exchange heat with the refrigerant (water) of the cabinet air conditioner 10 together, so that the cabinet air conditioner 10 is convenient to refrigerate. In the process, the outdoor wet bulb temperature is not high or low, heat exchange is carried out through the heat exchanger 23 and the water chilling unit 21 in a synergistic mode, and energy is saved.
Therefore, when the heat exchange device and the heat exchange method for exchanging heat for the cabinet air conditioner are used, a proper heat exchange mode (a first heat exchange mode, a second heat exchange mode or a third heat exchange mode) can be selected according to the outdoor wet bulb temperature, and comprehensively, the heat exchange effect can be ensured, and meanwhile, the effect of saving more energy is achieved.
In this embodiment, the first flow control valve, the second flow control valve, the third flow control valve and the fourth flow control valve are all valve opening-adjustable electromagnetic valves, so that the opening degrees of the first flow control valve, the second flow control valve, the third flow control valve and the fourth flow control valve can be conveniently adjusted according to needs.
Example 2:
as shown in fig. 1 and 2, a heat exchange device for exchanging heat for a cabinet air conditioner in the present embodiment includes a refrigeration unit 20 for exchanging heat for a refrigerant of a cabinet air conditioner 10; the refrigeration unit 20 comprises a water chilling unit 21, a heat exchange water pump 22 and a heat exchanger 23. Wherein, the water chilling unit 21 is a centrifugal water chilling unit, and the heat exchanger 23 is a plate heat exchanger.
The first water outlet pipe 12 of the cabinet air conditioner 10 is sequentially connected with the heat exchanger 23 and the water chilling unit 21 through the heat exchange water pump 22. The refrigerant of the cabinet air conditioner 10 is water, and the use environment of the cabinet air conditioner 10 is cooled by heat exchange between the water and the air in the use environment of the cabinet air conditioner 10.
The first water outlet pipe 12 of the cabinet air conditioner 10 is connected to the heat exchange water pump 22 through an air conditioner water outlet return pipe 14 (as shown in fig. 1 and 2).
Water (refrigerant) discharged from the first water outlet pipe 12 of the cabinet air conditioner 10 is pumped to the water chilling unit 21 and/or the heat exchanger 23 through the heat exchange water pump 22 for heat exchange, the second heat exchange water outlet pipe 212 of the water chilling unit 21 is connected with the first water inlet pipe 11 of the cabinet air conditioner 10, and specifically, the second heat exchange water outlet pipe 212 of the water chilling unit 21 is connected with the first water inlet pipe 11 of the cabinet air conditioner 10 through the air conditioner water inlet return pipe 13. The water after heat exchange by the supercooled water unit 21 and/or the heat exchanger 23 is returned to the first water inlet pipe 11 of the cabinet air conditioner 10 through the second heat exchange water outlet pipe 212 of the supercooled water unit 21 (power is from the heat exchange water pump 22); the water after heat exchange through the cold water unit 21 and/or the heat exchanger 23 can also be pumped to the first water inlet pipe 11 of the cabinet air conditioner 10 through another heat exchange water pump 22; the heat exchange between the water after heat exchange and the air in the use environment of the cabinet air conditioner 10 is facilitated, and the refrigeration of the cabinet air conditioner 10 is further realized; this forms a heat exchange cycle of the refrigerant of the cabinet air conditioner 10.
As shown in fig. 2, a first heat exchange water outlet pipe 232 of the heat exchanger 23 is connected with a second heat exchange water inlet pipe 211 of the water chilling unit 21 through a first branch pipe 24; a first heat exchange water inlet pipe 231 of the heat exchanger 23 is connected with a second heat exchange water outlet pipe 212 of the water chilling unit 21 through a second branch pipe 25; the first branch pipe 24 and the second branch pipe 25 are connected through a third branch pipe 26; a first flow control valve 271 and a third flow control valve 273 are arranged on the first branch pipe 24, and a second flow control valve 272 and a fourth flow control valve 274 are arranged on the second branch pipe 25; one end of the third branch pipe 26 is located between the first flow control valve 271 and the third flow control valve 273; the other end of the third branch pipe 26 is located between the second flow control valve 272 and the fourth flow control valve 274.
The heat exchange method for exchanging heat by using the heat exchange device is as follows:
the first heat exchange mode: when the outdoor wet bulb temperature is higher than 15 ℃, the first flow control valve 271 and the fourth flow control valve 274 are closed, the second flow control valve 272 and the third flow control valve 273 are opened, and then the heat exchange water pump 22 and the water chilling unit 21 are started, so that water flowing out of the first water outlet pipe 12 of the cabinet air conditioner 10 flows into the air conditioner water outlet return pipe 14 under the driving of the heat exchange water pump 22, then sequentially flows through the first heat exchange water inlet pipe 231, the second branch pipe 25, the third branch pipe 26, the first branch pipe 24 and the second heat exchange water inlet pipe 211 to enter the water chilling unit 21 for heat exchange (at this time, the water chilling unit 21 works, but the heat exchanger 23 does not work), and the water after heat exchange sequentially flows through the second heat exchange water outlet pipe 212 and the air conditioner water inlet return pipe 13 to return to the first water inlet pipe 11 of the cabinet air conditioner 10. In the heat exchange mode, the refrigerant (water) of the cabinet air conditioner 10 is subjected to heat exchange only through the cold water unit 21, so that the cabinet air conditioner 10 is conveniently cooled. In the process, the outdoor wet bulb temperature is higher, and the heat exchange is only carried out through the cold water unit 21, so that the heat exchange effect is better.
Or the second heat exchange mode: when the outdoor wet bulb temperature is less than or equal to 8 ℃, closing the second flow control valve 272 and the third flow control valve 273, opening the first flow control valve 271 and the fourth flow control valve 274, then starting the heat exchange water pump 22 and the heat exchanger 23, so that water flowing out of the first water outlet pipe 12 of the cabinet air conditioner 10 flows into the air conditioner water outlet return pipe 14 under the driving of the heat exchange water pump 22, then is pumped to the heat exchanger 23 for heat exchange (at this time, the heat exchanger 23 works, but the water chilling unit 21 does not work), and then flows into the second heat exchange water outlet pipe 212 after passing through the first heat exchange water outlet pipe 232, the first branch pipe 24, the third branch pipe 26 and the second branch pipe 25 in sequence, and finally returns to the first water inlet pipe 11 of the cabinet air conditioner 10 through the air conditioner water inlet return pipe 13; in the heat exchange mode, the heat exchange is performed only on the refrigerant (water) of the cabinet air conditioner 10 through the heat exchanger 23, so that the refrigeration of the cabinet air conditioner 10 is facilitated. In the process, the outdoor wet bulb temperature is low, heat exchange is carried out only through the heat exchanger 23, and energy is saved.
Or the third heat exchange mode: when the outdoor wet bulb temperature is greater than 8 ℃ and less than or equal to 15 ℃, opening the first flow control valve 271 and the fourth flow control valve 274, opening the second flow control valve 272 and the third flow control valve 273, and then starting the heat exchange water pump 22, the heat exchanger 23 and the water chilling unit 21, wherein the first flow control valve 271 and the fourth flow control valve 274 have the same opening degree, the second flow control valve 272 and the third flow control valve 273 have the same opening degree, and the outlet flow of the heat exchange water pump 22 is equal to the sum of the inlet flows of the first flow control valve 271 and the second flow control valve 272. In this case, the water from the first water outlet pipe 12 of the cabinet air conditioner 10 flows into the air conditioner water outlet return pipe 14 under the driving of the heat exchange water pump 22, and then is pumped to the first heat exchange water inlet pipe 231, and then two branches are formed, wherein one branch sequentially passes through the second branch pipe 25, the third branch pipe 26, the first branch pipe 24 and the second heat exchange water inlet pipe 211 and enters the water chilling unit 21 for heat exchange; the other branch pump is used for pumping the water to the heat exchanger 23 for heat exchange, and the water after heat exchange sequentially passes through the first heat exchange water outlet pipe 232, the first branch pipe 24, the third branch pipe 26 and the second branch pipe 25; and finally, the two branches are converged in a second heat exchange water outlet pipe 212 and returned to the first water inlet pipe 11 of the cabinet air conditioner 10 through the air conditioner water inlet return pipe 13. In the heat exchange mode, the heat exchanger 23 and the water chilling unit 21 exchange heat with the refrigerant (water) of the cabinet air conditioner 10 together, so that the cabinet air conditioner 10 is convenient to refrigerate. In the process, the outdoor wet bulb temperature is not high or low, heat exchange is carried out through the heat exchanger 23 and the water chilling unit 21 in a synergistic mode, and energy is saved.
When the heat exchange device and the heat exchange method for exchanging heat for the cabinet air conditioner are used, a proper heat exchange mode (a first heat exchange mode, a second heat exchange mode or a third heat exchange mode) can be selected according to the outdoor wet bulb temperature, and comprehensively, the heat exchange effect can be ensured, and meanwhile, the effect of saving more energy is achieved.
In this embodiment, as shown in fig. 1, the number of the cabinet air conditioners 10 is two, the number of the refrigeration units 20 is four, and the first water outlet pipes 12 of the two sets of the cabinet air conditioners 10 are both connected to the air conditioner water outlet return pipe 14; as shown in fig. 2, the second heat exchange water outlet pipes 212 of the water chilling units 21 of the four sets of refrigeration units 20 are all connected to the air conditioner water inlet return pipe 13. The water from the first water outlet pipe 12 of the two sets of cabinet air conditioners 10 will merge in the air conditioner water outlet return pipe 14, then flow into the four sets of refrigeration units 20 for heat exchange, the water after heat exchange by the four sets of refrigeration units 20 will merge in the air conditioner water inlet return pipe 13, and then flow into the first water inlet pipes 11 of the two sets of cabinet air conditioners 10, and the refrigerant (water) of the two sets of cabinet air conditioners 10 can be subjected to heat exchange by the four sets of refrigeration units 20, so that refrigeration of the two sets of cabinet air conditioners 10 is realized.
In the present embodiment, as shown in fig. 1, both the air-conditioning outlet water return pipe 14 and the air-conditioning inlet water return pipe 13 are circular pipes.
Example 3:
on the basis of embodiment 2, the heat exchange device for exchanging heat for a cabinet air conditioner of this embodiment further includes a cold storage tank 30, a second water inlet pipe 31 of the cold storage tank 30 is connected to the air conditioner water inlet return pipe 13, and a second water outlet pipe 32 of the cold storage tank 30 is connected to the first water inlet pipe 11 of the cabinet air conditioner 10. The water from the first water outlet pipe 12 of the cabinet air conditioner 10 exchanges heat through the refrigeration unit 20, the heat exchanged water merges in the air conditioner water inlet return pipe 13, one part flows into the cold storage tank 30 for cold storage, and the other part flows into the first water inlet pipes 11 of the two sets of cabinet air conditioners 10 and enters the heat exchange cycle of the refrigerant (water). The cold storage tank 30 in the present embodiment is used to supply a cooled refrigerant (cold water) to the cabinet air conditioner during a power outage, and stores the cold waterThe cold storage tank 30 is arranged at the 3 rd floor and is higher than the cabinet air conditioner 10, when power failure occurs, the valve on the second water outlet pipe 32 can be opened, water stored in the cold storage tank 30 can automatically flow into the first water inlet pipe 11 of the cabinet air conditioner 10 and enters a heat exchange cycle of a refrigerant (water), and the water storage capacity 197m of the cold storage tank3The cabinet air conditioner 10 may be provided with a 15 minute supply of cold water.
The heat exchange device of the embodiment is mainly used for emergency use under the conditions of power failure or faults and the like.
Fig. 1 shows an example of two cold storage tanks 30 and two groups of cabinet air conditioners 10, and the two cold storage tanks 30 provide cooled refrigerant (water) to the two groups of cabinet air conditioners 10 in a one-to-one correspondence.
Example 4:
on the basis of embodiment 2, the heat transfer device for carrying out the heat transfer for rack air conditioner of this embodiment still includes automatic level pressure moisturizing exhaust apparatus 40, automatic level pressure moisturizing exhaust apparatus 40 through moisturizing pump 41 with air conditioner play water return pipe 14 is connected, moisturizing pump 41 through moisturizing pipe 43 with air conditioner play water return pipe 14 is connected, air conditioner play water return pipe 14 is connected with the water storage tank 42 of automatic level pressure moisturizing exhaust apparatus 40 through outlet pipe 44, all is equipped with the flow valve on moisturizing pipe 43 and the outlet pipe 44, can adjust the flow valve as required and carry out moisturizing or sluicing for air conditioner play water return pipe 14.
As shown in fig. 3, the automatic constant pressure water replenishing and air exhausting device includes a water storage tank 42, a water filter group, and an automatic medicine adding device 46 for adding medicine into the water filter group (the automatic medicine adding device 46 may be a medicine adding device in the prior art, and is not described herein again). Because the water storage tank 42 is connected with the air-conditioning water outlet return pipe 14 through the water replenishing pump 41, and the tap water pipe 47 is respectively connected with the water storage tank 42 and the water filter group, the water in the tap water pipe 47 can be directly supplied to the water storage tank 42, and then is pumped to the air-conditioning water outlet return pipe 14 through the water replenishing pump 41 to replenish the water; the water from the water pipe 47 may be filtered by the water filter set, and then the filtered water is transported to the water storage tank 42, and further pumped by the water replenishing pump 41 to the air conditioner water outlet return pipe 14 for water replenishment.
In this embodiment, the water filter set comprises two water filters 45, and the water filters 45 may be selected from side-filtering water filters. The outlet of the water filter group is connected with the water storage tank 42, the tap water pipe 47 is connected with the inlet of the first water filter 45, the outlet of the first water filter 45 is connected with the inlet of the second water filter 45, the outlet of the second water filter 45 is the outlet of the water filter group, namely, the outlet of the second water filter 45 is connected with the water storage tank 42, so that the water of the tap water pipe 47 can be filtered through the two water filters 45 (the medicament of the automatic medicament feeding device 46 can be automatically fed into the two water filters 45, so that the flocculation and sedimentation of impurities in the water can be realized, and then the water is filtered and separated by the water filters 45), then the filtered water is conveyed to the water storage tank 42, and then the water is pumped to the air conditioner water outlet return pipe 14 by the water replenishing pump 41 to replenish the water.
After being filtered by the two water filters 45, the water entering the water outlet return pipe 14 is purified, and the use of the cabinet air conditioner 10 is prevented from being influenced by impurities in an air conditioner refrigerant circulation loop.
The present invention is not limited to the above-described alternative embodiments, and various other forms of products can be obtained by anyone in light of the present invention. The above detailed description should not be taken as limiting the scope of the invention, which is defined in the claims, and which the description is intended to be interpreted accordingly.
Claims (10)
1. A heat exchange device for exchanging heat for a cabinet air conditioner is characterized by comprising a refrigeration unit for exchanging heat for a refrigerant of the cabinet air conditioner;
the refrigeration unit comprises a water chilling unit, a heat exchange water pump and a heat exchanger;
a first water outlet pipe of the cabinet air conditioner is sequentially connected with the heat exchanger and the water chilling unit through the heat exchange water pump;
a second heat exchange water outlet pipe of the water chilling unit is connected with a first water inlet pipe of the cabinet air conditioner;
a first heat exchange water outlet pipe of the heat exchanger is connected with a second heat exchange water inlet pipe of the water chilling unit through a first branch pipe;
a first heat exchange water inlet pipe of the heat exchanger is connected with a second heat exchange water outlet pipe of the water chilling unit through a second branch pipe;
the first branch pipe is connected with the second branch pipe through a third branch pipe;
the first branch pipe is provided with a first flow control valve and a third flow control valve, and the second branch pipe is provided with a second flow control valve and a fourth flow control valve;
one end of the third branch pipe is positioned between the first flow control valve and the third flow control valve;
the other end of the third branch pipe is positioned between the second flow control valve and the fourth flow control valve.
2. The heat exchanging device for a cabinet air conditioner according to claim 1, wherein: and a first water outlet pipe of the cabinet air conditioner is connected with the heat exchange water pump through an air conditioner water outlet return pipe.
3. The heat exchanging device for a cabinet air conditioner according to claim 2, wherein: and a second heat exchange water outlet pipe of the water chilling unit is connected with a first water inlet pipe of the cabinet air conditioner through an air conditioner water inlet return pipe.
4. The heat exchanging device for a cabinet air conditioner according to claim 3, wherein: the number of the cabinet air conditioners is two, the number of the refrigeration units is four, and the first water outlet pipes of the two cabinet air conditioners are connected with the air conditioner water outlet return pipe;
and the second heat exchange water outlet pipes of the water chilling units of the four groups of refrigeration units are connected with the air conditioner water inlet return pipe.
5. The heat exchanging device for a cabinet air conditioner according to claim 3, wherein: still include cold storage tank, cold storage tank's second inlet tube with the air conditioner return pipe that intakes is connected, cold storage tank's second outlet pipe with the first water piping connection of rack air conditioner.
6. The heat exchanging device for a cabinet air conditioner according to claim 2, wherein: the automatic constant-pressure water supplementing and air exhausting device is connected with the air conditioner water outlet return pipe through a water supplementing pump.
7. The heat exchanging device for a cabinet air conditioner according to claim 6, wherein: the automatic constant-pressure water supplementing and exhausting device comprises a water storage tank, a water filter group and an automatic dosing device for dosing into the water filter group;
the outlet of the water filter group is connected with the water storage tank, and the water storage tank is connected with the air conditioner water outlet return pipe through the water replenishing pump.
8. The heat exchanging device for a cabinet air conditioner according to claim 7, wherein: the water filter group comprises two water filters.
9. The heat exchanging device for a cabinet air conditioner according to claim 8, wherein: the water filter is a side-filtering water filter.
10. A heat exchange method for exchanging heat by using the heat exchange apparatus according to any one of claims 1 to 9, characterized in that: the method comprises the following steps:
when the outdoor wet bulb temperature is higher than 15 ℃, closing the first flow control valve and the fourth flow control valve, opening the second flow control valve and the third flow control valve, and then starting the heat exchange water pump and the water chilling unit;
or when the outdoor wet bulb temperature is less than or equal to 8 ℃, closing the second flow control valve and the third flow control valve, opening the first flow control valve and the fourth flow control valve, and then starting the heat exchange water pump and the heat exchanger;
or when the outdoor wet bulb temperature is higher than 8 ℃ and lower than or equal to 15 ℃, opening the first flow control valve and the fourth flow control valve, opening the second flow control valve and the third flow control valve, and then starting the heat exchange water pump, the heat exchanger and the water chilling unit, wherein the first flow control valve and the fourth flow control valve have the same opening degree, the second flow control valve and the third flow control valve have the same opening degree, and the outlet flow of the heat exchange water pump is equal to the sum of the inlet flows of the first flow control valve and the second flow control valve.
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