An adaptive evaporative cooling heat pipe coupled air conditioning unit

Abstract

The present invention provides an adaptable evaporative cooling heat pipe coupled air conditioning unit, which includes a unit box body, an internal circulation module and an external circulation module; an internal space of the unit box body is provided with an independent internal circulation chamber and an external circulation chamber, the internal circulation module is located in the internal circulation chamber, and the external circulation module is located in the external circulation chamber; the internal circulation module includes an internal circulation fan, a heat pipe evaporator, a mechanical refrigeration evaporator, etc.; the external circulation module includes an external circulation fan, a cold storage condenser, a heat pipe condenser, a heat pipe circulation spray pump, a mechanical refrigeration condenser, a mechanical refrigeration circulation spray pump, etc.; the unit combines the heat pipe technology, the evaporative cooling technology and the mechanical refrigeration technology, and the heat exchange of the heat pipe condenser preferentially adopts the air cooling and evaporative cooling methods; the mechanical refrigeration technology is used as a supplement, so as to make full use of natural heat sources and reduce the energy consumption of the data center; a heat pipe refrigeration cold storage heat exchange unit is set to ensure continuous refrigeration when the mains power is cut off.

Description

Technical Field

[0001] The present invention relates to the field of air conditioning, and particularly to an adaptive evaporative cooling heat pipe coupled air conditioning unit for a data center. Background Art

[0002] With the development of remote work, distance education, e-commerce, etc., a large number of emerging customer demands have been cultivated, driving a substantial increase in the scale of customer demands in the Chinese IDC (Internet Data Center) industry and promoting the stable growth of the market scale of the Chinese IDC business. It is expected that in 2022, the market scale of the Chinese IDC business will exceed 320.05 billion yuan, with a year-on-year growth of 28.8%, entering a new round of explosive growth period. The energy consumption of IT equipment accounts for about 40% of the total energy consumption of the data center, and the air conditioning system accounts for 40%. Therefore, the data center requires a more efficient cooling solution.

[0003] Currently, there are a wide variety of new energy-saving technologies for data centers, which are becoming increasingly mature and are being applied more and more widely. It is particularly important to adopt refrigeration methods such as natural cold sources according to local conditions and promote efficient coordination with mechanical refrigeration to significantly improve the energy efficiency level of data centers.

[0004] Traditional water-cooled chilled water systems are applicable to data centers across the country, but there are freezing problems in cold regions, and the utilization time of natural cold sources is short in southern regions, resulting in relatively poor energy-saving performance. In addition, traditional water-cooled chilled water systems also have the disadvantages of complex control, large water consumption, and high annual operating costs. The application of evaporative cooling technology is closely related to the climate environment. Using evaporative cooling technology alone for air conditioning is restricted by the utilization duration of natural cold sources and the building floor plan, and it is impossible to achieve a single cold source cooling form. And heat pipe technology has the problem of being unable to fully utilize natural cold sources, and its refrigeration capacity is greatly affected by conditions such as height. Summary of the Invention

[0005] Object of the Invention: The technical problem to be solved by the present invention is to provide an adaptive evaporative cooling heat pipe coupled air conditioning unit in view of the deficiencies of the prior art.

[0006] To solve the above technical problems, the present invention discloses an adaptive evaporative cooling heat pipe coupled air conditioning unit, which includes a unit housing, an internal circulation module and an external circulation module; the internal space of the unit housing is provided with an independent internal circulation chamber and an external circulation chamber, the internal circulation module is located in the internal circulation chamber, and the external circulation module is located in the external circulation chamber; the internal circulation module includes an internal circulation fan for sucking indoor air, a heat pipe evaporator, a mechanical refrigeration evaporator, a throttling component and a compressor; the external circulation module successively includes an external circulation fan for sucking outdoor fresh air from top to bottom, a cold storage condenser, a heat pipe condenser, a heat pipe water distributor, a heat pipe circulating spray water pump, a mechanical refrigeration condenser, a mechanical refrigeration circulating spray water pump, a mechanical refrigeration water distributor and a circulating water sump for receiving the spray water; the heat pipe evaporator is selectively connected to the condenser main body of the heat pipe condenser or the cold storage condenser through a pipeline; the mechanical refrigeration evaporator, the throttling component, the compressor and the mechanical refrigeration condenser are connected through a pipeline; the heat pipe circulating spray water pump is used to transport the circulating water in the circulating water sump to the heat pipe water distributor; the mechanical refrigeration circulating spray water pump is used to transport the circulating water in the circulating water sump to the mechanical refrigeration water distributor; an indoor return air outlet is opened at the top of the internal circulation chamber, and the internal circulation fan is installed below the indoor return air outlet; an indoor air supply outlet is opened at the lower part of the side surface of the internal circulation chamber opposite to the external circulation chamber; when the internal circulation fan is turned on, air enters the internal circulation chamber from the indoor return air outlet, and after passing through the mechanical refrigeration evaporator and the heat pipe evaporator in sequence, it is discharged from the indoor air supply outlet; an outdoor air outlet is opened at the top of the external circulation chamber, and the external circulation fan is installed below the outdoor air outlet; fresh air inlets are opened on both sides of the lower part of the external circulation chamber; when the external circulation fan is turned on, outdoor fresh air enters from the fresh air inlets, and after passing through the mechanical refrigeration water distributor, the mechanical refrigeration condenser, the heat pipe water distributor, the heat pipe condenser, the cold storage condenser and the external circulation fan in sequence, it is discharged from the outdoor air outlet.

[0007] Specifically, the unit further includes a first valve, a second valve, a third valve and a fourth valve. One end of the first valve is connected to one end of the cold storage condenser through a pipeline, one end of the second valve is connected to the other end of the cold storage condenser through a pipeline, one end of the third valve is connected to the heat pipe condenser through a pipeline, one end of the fourth valve is connected to the other end of the heat pipe condenser through a pipeline, and the other end of the first valve and the other end of the third valve are connected in parallel to one end of the heat pipe evaporator; the other end of the second valve and the other end of the fourth valve are connected in parallel to the other end of the heat pipe evaporator; by controlling the opening and closing of the first valve, the second valve, the third valve and the fourth valve, the switching between the cold storage condenser and the heat pipe condenser is realized.

[0008] Specifically, when the outdoor ambient dry-bulb temperature ≤ 6°C, the internal circulation fan, heat pipe evaporator, heat pipe condenser, external circulation fan, third valve, and fourth valve are all enabled, while the mechanical refrigeration evaporator, compressor, mechanical refrigeration condenser, heat pipe circulation spray pump, mechanical refrigeration circulation spray pump, cold storage condenser, first valve, and second valve are all closed, and the unit is in the pure heat pipe natural cooling mode.

[0009] When the outdoor ambient wet-bulb temperature ≤ 13°C, the internal circulation fan, heat pipe evaporator, heat pipe condenser, external circulation fan, heat pipe circulation spray pump, third valve, and fourth valve are all enabled, while the mechanical refrigeration evaporator, compressor, mechanical refrigeration condenser, mechanical refrigeration circulation spray pump, cold storage condenser, first valve, and second valve are all closed, and the unit is in the evaporative cooling heat pipe mode.

[0010] When 13°C < outdoor ambient wet-bulb temperature ≤ 35°C, the internal circulation fan, heat pipe evaporator, heat pipe condenser, external circulation fan, heat pipe circulation spray pump, mechanical refrigeration evaporator, compressor, mechanical refrigeration condenser, mechanical refrigeration circulation spray pump, third valve, and fourth valve are all enabled, while the cold storage condenser, first valve, and second valve are all closed, and the unit is in the combined refrigeration mode.

[0011] When an accidental power outage occurs in the power system supplying power to the system, the mechanical refrigeration evaporator, compressor, mechanical refrigeration condenser, mechanical refrigeration circulation spray pump, heat pipe circulation spray pump, third valve, and fourth valve are all closed, while the internal circulation fan, heat pipe evaporator, heat pipe condenser, external circulation fan, cold storage condenser, first valve, and second valve are all enabled, and the unit is in the cold storage mode.

[0012] Furthermore, the heat pipe evaporator, mechanical refrigeration evaporator, and compressor are all located at the lower part of the internal circulation chamber. The heat pipe evaporator is opposite to the indoor air supply outlet, and the mechanical refrigeration evaporator is located between the evaporator and the compressor.

[0013] Furthermore, within the external circulation module, the spraying directions of the mechanical refrigeration water distributor and the heat pipe water distributor are the same as the flowing direction of the outdoor fresh air.

[0014] Furthermore, it also includes an internal circulation filter, an external circulation filter, and a water baffle for steam-water separation. The internal circulation filter is located at the air outlet of the internal circulation fan. The external circulation filter is installed on one side of the fresh air inlet facing the external circulation chamber, and the water baffle is installed above the cold storage condenser and below the external circulation fan.

[0015] Furthermore, the throttling component is an electronic expansion valve.

[0016] Further, it further includes a control system for monitoring, controlling, and switching the unit. The control system coordinates with each component of the unit to work well together to achieve continuous, stable, and reliable cooling supply.

[0017] Further, it further includes a power conversion module. The power conversion module provides a UPS (Uninterruptible Power Supply) backup power supply for the internal circulation fan, external circulation fan, mechanical refrigeration evaporator, electronic expansion valve, compressor, and cold storage condenser to achieve uninterrupted cooling during power interruption.

[0018] Further, the cold storage condenser is connected to an external cold storage tank through a cold storage water pipeline.

[0019] Beneficial effects:

[0020] (1) In view of the deficiencies of the prior art, the present application proposes an adaptable evaporative cooling heat pipe coupled air conditioning unit, which includes an independent heat pipe refrigeration heat exchange unit, a mechanical refrigeration heat exchange unit, and an evaporative cooling spray unit. Compared with a single mechanical refrigeration heat exchange unit, it can greatly utilize natural cold sources, reduce the load borne by the mechanical refrigeration unit, and has the advantages of system energy saving and a wider application range.

[0021] (2) The present invention switches the working mode according to the ambient wet bulb temperature, preferentially uses non-compressive refrigeration to reduce energy consumption; in winter, the present invention can fully utilize natural cold sources through heat pipe technology to meet all the refrigeration requirements of the data room, and uses the cold storage mode when an accidental power outage occurs in the power system supplying power to the system; in the transitional season, the present invention combines evaporative cooling technology with heat pipe technology to fully utilize natural cold sources to meet the refrigeration requirements of the data room; in the combined refrigeration mode, within the internal circulation module, the present invention combines evaporative cooling technology with a DX refrigeration heat exchange system to fully utilize natural cold sources to cool the high-temperature return air in the hot aisle of the data center for the first time, and then combines evaporative cooling technology with a heat pipe refrigeration heat exchange system to cool the sub-high-temperature return air for the second time to achieve cascade cooling. In the external circulation module, outdoor fresh air simultaneously takes away the heat of both the heat pipe condenser and the mechanical refrigeration condenser. The external circulation fan and the internal circulation fan are in operation, and intelligent speed regulation is achieved according to the cold aisle temperature and the hot aisle temperature. The heat pipe circulation spray pump and the mechanical refrigeration circulation spray pump are in operation, and the compressor is in operation, and intelligent start and stop of the compressor are achieved according to the outdoor dry and wet bulb temperatures to meet the refrigeration requirements of the data room.

[0022] (3) In the present invention, both the heat pipe condenser and the mechanical refrigeration condenser are evaporative cooling heat exchange cores. The heat pipe condenser is arranged below the cold storage condenser; the mechanical refrigeration condenser is arranged below the heat pipe unit condenser; the heat pipe evaporator, the mechanical refrigeration evaporator, and the compressor are all located in the lower area of the internal circulation chamber. The heat pipe evaporator faces the indoor air supply outlet, and the mechanical refrigeration evaporator is located between the heat pipe evaporator and the compressor; the mechanical refrigeration evaporator performs primary precooling on the indoor return air, and the heat pipe evaporator performs secondary cooling on the indoor air that has been cooled by the mechanical refrigeration evaporator to provide cold air for the data room. Therefore, when the heat pipe refrigeration heat exchange unit and the mechanical refrigeration heat exchange unit operate jointly in the present invention, the evaporation cooling heat and moisture exchange effect is fully utilized, the heat dissipation efficiency of the heat pipe condenser and the mechanical refrigeration condenser is improved, and cascade cooling is achieved simultaneously.

[0023] (4) In the present invention, by starting and stopping the heat pipe refrigeration heat exchange unit, the mechanical refrigeration heat exchange unit, the heat pipe circulating spray pump, the mechanical refrigeration circulating spray pump, the first valve, the second valve, the third valve, and the fourth valve, continuous switching of the system operation mode can be achieved; the heat pipe refrigeration heat exchange unit, the mechanical refrigeration heat exchange unit, and the evaporation cooling spray unit can all operate independently, avoiding the problem of insufficient system refrigeration capacity caused by the switching of the operation mode due to a large change in the environment within a short period of time.

[0024] (5) In the present invention, the heat pipe evaporator can be selectively connected to the cold storage condenser to form a heat pipe refrigeration cold storage heat exchange unit; the cold storage condenser is connected to an external cold storage tank through a cold storage water pipeline; when the commercial power is cut off, the power conversion module provides UPS backup power for the internal circulation fan and the external circulation fan, so that the heat pipe refrigeration cold storage heat exchange unit can provide continuous refrigeration capacity for the data center.

[0025] (6) The present invention integrates UPS power supply and distribution, sets a power conversion module, combines cold and electricity, has an extremely simple power supply link, integrates energy storage to reduce peak load, improves the power output rate, and saves floor space.

[0026] (7) The present invention is adapted to various data rooms, is installed in the side equipment area on the same floor of the computer room, uses diffused air supply and ceiling return air; the internal circulation chamber and the external circulation chamber are independent of each other, and the air supply and exhaust are completely isolated to form a complete and reasonable air flow organization. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The following further specifically describes the present invention in conjunction with the drawings and specific embodiments, and the above and / or other advantages of the present invention will become clearer.

[0028] Figure 1 It is a schematic installation diagram of an adaptable evaporative cooling heat pipe coupled air conditioner unit in a data room according to an embodiment of the present invention.

[0029] Figure 2 Front view of an adapted evaporative cooling heat pipe coupled air conditioning unit according to an embodiment of the present invention.

[0030] Figure 3 is Figure 2 Side view of an adapted evaporative cooling heat pipe coupled air conditioning unit as shown. Detailed implementation manners

[0031] The present invention will be described in detail below with reference to the drawings.

[0032] The reference numerals of the present invention are as follows: internal circulation fan 1, internal circulation filter 2, indoor return air inlet 3, indoor air supply outlet 4, heat pipe evaporator 5, mechanical refrigeration evaporator 6, electronic expansion valve 7, compressor 8, circulating water sump 9, external circulation filter 10, mechanical refrigeration water distributor 11, mechanical refrigeration circulating spray water pump 12, mechanical refrigeration condenser 13, heat pipe circulating spray water pump 14, heat pipe water distributor 15, heat pipe condenser 16, external circulation fan 17, water baffle 18, fresh air inlet 19, cold storage condenser 20, first valve 21, second valve 22, power conversion module 23, third valve 24, fourth valve 25, outdoor air supply outlet 26, first partition 27, second partition 28, cold storage water pipeline 29, roof 30, cabinet 31, main computer room 32, equipment room 33, unit box 34, internal circulation chamber 35, external circulation chamber 36.

[0033] As Figures 1 to 3 shown, the present invention provides an adapted evaporative cooling heat pipe coupled air conditioning unit, which mainly includes a unit box 34, an internal circulation module and an external circulation module; the internal space of the unit box 34 is separated by a partition into an independent internal circulation chamber 35 and an external circulation chamber 36, the internal circulation module is located in the internal circulation chamber 35, and the external circulation module is located in the external circulation chamber 36.

[0034] As Figure 1 shown, the unit can be installed in the equipment room 33 next to the main computer room 32, the unit is isolated from the computer room 32, and the low-temperature indoor return air is conveyed into the main computer room 32 by a diffused air supply method. The hot channel in the main computer room 32 is closed, the indoor return air returns to the internal circulation chamber of the unit through the indoor ceiling, and the exhaust air of the unit is discharged to the roof 30 through an exhaust well, and the supply and exhaust air are completely isolated to form a complete and reasonable air flow organization.

[0035] As Figure 2As shown in the figure, the internal circulation module includes an internal circulation fan 1 for sucking indoor air, a heat pipe evaporator 5, a mechanical refrigeration evaporator 6, an electronic expansion valve 7, and a compressor 8. The external circulation module includes, from top to bottom in sequence, an external circulation fan 17 for sucking outdoor fresh air, a cold storage condenser 20, a heat pipe condenser 16, a heat pipe water distributor 15, a heat pipe circulating spray water pump 14, a mechanical refrigeration condenser 13, a mechanical refrigeration circulating spray water pump 12, a mechanical refrigeration water distributor 11, and a circulating water sump 9. The heat pipe evaporator 5 is selectively connected to the condenser body of the heat pipe condenser 16 or the cold storage condenser 20 through a pipeline. When the heat pipe evaporator 5 is connected to the heat pipe condenser 16 through a pipeline, a heat pipe refrigeration heat exchange unit is formed; when the heat pipe evaporator 5 is connected to the condenser body of the cold storage condenser 20 through a pipeline, a heat pipe refrigeration and cold storage heat exchange unit is formed. The mechanical refrigeration evaporator 6, the electronic expansion valve 7, the compressor 8, and the mechanical refrigeration condenser 13 are connected through pipelines to form a mechanical refrigeration heat exchange unit. Among them, both the heat pipe condenser 16 and the mechanical refrigeration condenser 13 adopt evaporation cooling heat exchange cores. The circulating water sump 9, the mechanical refrigeration water distributor 11, the mechanical refrigeration circulating spray water pump 12, the heat pipe circulating spray water pump 14, and the heat pipe water distributor 15 together constitute an evaporation cooling spray unit. The water inlet of the heat pipe circulating spray water pump 14 is connected to the circulating water sump 9 through a pipeline, and the water outlet of the heat pipe circulating spray water pump 14 is connected to the heat pipe water distributor 15 through a pipeline. The heat pipe circulating spray water pump 14 is used to transport the circulating water in the circulating water sump 9 to the heat pipe water distributor 15. The water inlet of the mechanical refrigeration circulating spray water pump 12 is connected to the circulating water sump 9 through a pipeline, and the water outlet of the mechanical refrigeration circulating spray water pump 12 is connected to the mechanical refrigeration water distributor 11. The mechanical refrigeration circulating spray water pump 12 is used to transport the circulating water in the circulating water sump 9 to the mechanical refrigeration water distributor 11.

[0036] As Figure 2 shown, an indoor return air outlet 3 is provided at the top of the internal circulation chamber, and the internal circulation fan 1 is installed below the indoor return air outlet 3. An indoor air supply outlet 4 is provided at the lower part of the side of the internal circulation chamber opposite to the external circulation chamber. Air enters the internal circulation chamber from the indoor return air outlet 3, passes through the air inlet pipe, the mechanical refrigeration evaporator 6, and the heat pipe evaporator 5 in sequence, and then is discharged from the indoor air supply outlet 4. An outdoor air outlet 26 is provided at the top of the external circulation chamber, and fresh air inlets 19 are provided on both sides of the lower part of the external circulation chamber. Outdoor fresh air enters from the fresh air inlets 19, passes through the mechanical refrigeration water distributor 11, the mechanical refrigeration condenser 13, the heat pipe water distributor 15, the heat pipe condenser 16, the cold storage condenser 20, and the external circulation fan 17 in sequence, and then is discharged from the outdoor air outlet 26. Preferably, the spraying directions of both the mechanical refrigeration water distributor 11 and the heat pipe water distributor 15 are the same as the flowing direction of the outdoor fresh air. Preferably, as Figure 1As shown in the figure, the unit further includes an internal circulation filter 2, and the internal circulation filter 2 is located at the air outlet of the internal circulation fan 1. By providing the internal circulation filter 2, it is used to filter and purify the indoor air drawn into the internal circulation chamber. Preferably, as Figure 1 shown, the unit further includes an external circulation filter 10, and the external circulation filter 10 is located on the side of the fresh air inlet 19 facing the external circulation chamber. Preferably, as Figure 1 shown, the unit further includes a water baffle 18 for steam-water separation, and the water baffle 18 is located below the external circulation fan 17 and above the cold storage condenser 20. Preferably, the unit further includes a control system for monitoring, controlling and switching of the unit.

[0037] As Figure 2 shown, the unit further includes a first partition 27 and a second partition 28. The first partition 27 and the internal circulation filter 2 together divide the internal circulation chamber into upper, middle and lower regions. The middle region is divided into a left space and a right space by the second partition 28, and the power conversion module 23 is located in the left space of the middle region. The right space of the middle region communicates with the upper and lower regions of the internal circulation chamber to form a cold air passage. The heat pipe evaporator 5, the mechanical refrigeration evaporator 6 and the compressor 8 are all located in the lower region of the internal circulation chamber. The heat pipe evaporator 5 is opposite to the indoor air supply outlet 4, and the mechanical refrigeration evaporator 6 is located between the heat pipe evaporator 5 and the compressor 8.

[0038] Specifically, in order to realize the switching between the cold storage condenser 20 and the heat pipe condenser 16, the unit further includes a first valve 21, a second valve 22, a third valve 24 and a fourth valve 25. One end of the first valve 21 is connected to one end of the cold storage condenser 20 through a pipeline, and one end of the second valve 22 is connected to the other end of the cold storage condenser 20 through a pipeline. One end of the third valve 24 is connected to the heat pipe condenser 16 through a pipeline, and one end of the fourth valve 25 is connected to the other end of the heat pipe condenser 16 through a pipeline. The other end of the first valve 21 and the other end of the third valve 24 are connected in parallel to one end of the heat pipe evaporator 5; the other end of the second valve 22 and the other end of the fourth valve 25 are connected in parallel to the other end of the heat pipe evaporator 5; by controlling the opening and closing of the first valve 21, the second valve 22, the third valve 24 and the fourth valve 25, the switching between the cold storage condenser 20 and the heat pipe condenser 16 is realized.

[0039] Thus, the present invention has four working modes, namely a pure heat pipe natural cooling mode (i.e., the first mode), an evaporation cooling heat pipe mode (i.e., the second mode), a combined refrigeration mode (i.e., the third mode) and a cold storage mode (i.e., the fourth mode). During the whole-year operation, the unit defines the switching conditions of the four working modes according to the outdoor wet bulb temperature and dry bulb temperature.

[0040] In winter, when the outdoor ambient dry-bulb temperature ≤ 6°C, the unit can meet all the refrigeration requirements of the data center by making full use of the natural cold source through the heat pipe technology. The internal circulation fan 1, heat pipe evaporator 5, heat pipe condenser 16, external circulation fan 17, third valve 24, and fourth valve 25 are all enabled, while the mechanical refrigeration evaporator 6, compressor 8, mechanical refrigeration condenser 13, heat pipe circulation spray pump 14, heat pipe water distributor 15, mechanical refrigeration circulation spray pump 12, mechanical refrigeration water distributor 11, cold storage condenser 20, first valve 21, and second valve 22 are all closed. The unit is in the pure heat pipe natural cooling mode.

[0041] The working process of the unit in the pure heat pipe natural cooling mode is as follows: In the internal circulation chamber, the internal circulation fan 1 sucks the indoor return air from the indoor return air inlet 3 into the internal circulation module of the unit and filters and purifies it through the internal circulation filter 2. The purified indoor return air is cooled by the heat pipe evaporator 5 and then sent into the computer room through the indoor air supply outlet 4. In the external circulation chamber, under the suction of the external circulation fan 17, the low-temperature outdoor fresh air in winter enters from the two fresh air inlets 19 on both sides of the external circulation chamber, passes through the heat pipe condenser 16 and takes away its heat. After heat exchange, the outdoor fresh air is completely separated from steam and water by the water baffle 18 and then discharged to the outside through the outdoor air outlet 26.

[0042] In the transitional season, when the outdoor ambient wet-bulb temperature ≤ 13°C, the unit combines the evaporative cooling technology with the heat pipe technology to make full use of the natural cold source to meet the refrigeration requirements of the data center. The internal circulation fan 1, heat pipe evaporator 5, heat pipe condenser 16, external circulation fan 17, heat pipe circulation spray pump 14, heat pipe water distributor 15, third valve 24, and fourth valve 25 are all enabled, while the mechanical refrigeration evaporator 6, compressor 8, mechanical refrigeration condenser 13, mechanical refrigeration circulation spray pump 12, mechanical refrigeration water distributor 11, cold storage condenser 20, first valve 21, and second valve 22 are all closed. The unit is in the evaporative cooling heat pipe mode.

[0043] The working process of the unit in the evaporative cooling tube mode is as follows: In the inner circulation chamber, the inner circulation fan 1 sucks the indoor return air from the indoor return air inlet 3 into the unit's inner circulation module and filters and purifies it through the inner circulation filter 2. In the outer circulation chamber, under the action of the outer circulation fan 17, outdoor fresh air enters from the two fresh air inlets 19 on both sides of the outer circulation chamber and undergoes sufficient heat and moisture exchange with the water sprayed by the heat pipe water distributor 15. The outdoor fresh air after heat and moisture exchange takes away the heat of the heat pipe condenser 16. After heat exchange, the outdoor fresh air is completely separated from water and steam by the water baffle 18 and then discharged outdoors from the outdoor air outlet 26. At the same time, the heat pipe circulating spray water pump 14 lifts the water in the circulating water sump 9 from the lower part to the upper part of the heat pipe water distributor 15, and the heat pipe water distributor 15 sprays upward. The outdoor fresh air and the water sprayed by the heat pipe water distributor 15 flow in the same direction, causing the sprayed water to form a liquid film evenly covering the surface of the heat pipe condenser 16. Through the heat and moisture exchange between the water film and the outdoor fresh air, the temperature of the circulating water is reduced. After the low-temperature circulating water is recovered into the circulating water sump 9, it is sent to the heat pipe water distributor 15 for spraying again, and so on.

[0044] In summer, when 13°C < outdoor ambient wet bulb temperature ≤ 35°C, the inner circulation fan 1, heat pipe evaporator 5, heat pipe condenser 16, outer circulation fan 17, heat pipe circulating spray water pump 14, heat pipe water distributor 15, mechanical refrigeration evaporator 6, compressor 8, mechanical refrigeration condenser 13, mechanical refrigeration circulating spray water pump 12, mechanical refrigeration water distributor 11, third valve 24, and fourth valve 25 are all enabled, and the cold storage condenser 20, first valve 21, and second valve 22 are all closed. The unit is in the combined refrigeration mode.

[0045] In the combined refrigeration mode, in the inner circulation module, the unit combines the evaporative cooling technology with the DX refrigeration heat exchange system, makes full use of the natural cold source to cool the high-temperature return air in the hot aisle of the data center for the first time, and then combines the evaporative cooling technology with the heat pipe refrigeration heat exchange system to cool the sub-high-temperature return air for the second time to achieve cascade cooling. In the outer circulation module, the outdoor fresh air takes away the heat of both the heat pipe condenser 16 and the mechanical refrigeration condenser 13 at the same time. The outer circulation fan 17 and the inner circulation fan 1 are in operation and achieve intelligent speed regulation according to the cold aisle temperature and the hot aisle temperature. The heat pipe circulating spray water pump 14 and the mechanical refrigeration circulating spray water pump 12 are in operation. The compressor 8 is in operation and achieves intelligent start and stop of the compressor 8 according to the outdoor dry and wet bulb temperatures to meet the refrigeration requirements of the data computer room. The intelligent speed regulation technology of the outer circulation fan 17 and the inner circulation fan 1 and the intelligent start and stop technology of the heat pipe circulating spray water pump 14 and the mechanical refrigeration circulating spray water pump 12 mentioned above are existing technologies in this field, and this embodiment does not make specific limitations.

[0046] The working process of this unit in the combined refrigeration mode is as follows: In the internal circulation chamber, under the suction of the internal circulation fan 1, the indoor return air enters the internal circulation module through the indoor return air inlet 3. After being filtered and purified by the internal circulation filter 2, it is first pre-cooled once by the mechanical refrigeration evaporator 6 and then pre-cooled twice by the heat pipe evaporator 5. The air that has been pre-cooled twice and meets the temperature and humidity requirements is sent into the computer room through the indoor air supply outlet 4. At the same time, under the suction of the external circulation fan 17, the outdoor fresh air enters the external circulation module through the fresh air inlet 19. Preferably, it enters from both sides and flows upward. The spraying directions of the water sprayed by the mechanical refrigeration water distributor 11 and the heat pipe water distributor 15 are the same as the flowing direction of the outdoor fresh air in the internal circulation module, so that the sprayed water forms a liquid film evenly covering the surfaces of the mechanical refrigeration condenser 13 and the heat pipe condenser 16, thus maximizing the utilization rate of the heat exchange area and the heat exchange efficiency. After heat exchange, the outdoor fresh air is completely separated from water and steam by the water baffle 18 and then discharged to the outside through the outdoor air outlet 26. During this process, the outdoor fresh air passes through the mechanical refrigeration condenser 13 and the heat pipe condenser 16, taking away their heat.

[0047] When an accidental power outage occurs in the power system that supplies power to the system, this unit enters the cold storage mode. In the cold storage mode, the mechanical refrigeration evaporator 6, the compressor 8, the mechanical refrigeration condenser 13, the mechanical refrigeration cycle spray water pump 12, the mechanical refrigeration water distributor 11, the heat pipe cycle spray water pump 14, the heat pipe water distributor 15, the third valve 24, and the fourth valve 25 are all closed, and the internal circulation fan 1, the heat pipe evaporator 5, the heat pipe condenser 16, the external circulation fan 17, the cold storage condenser 20, the first valve 21, and the second valve 22 are all enabled. In the cold storage mode, the power conversion module 23 of this unit supplies power to the internal circulation fan 1, the external circulation fan 17, the cold storage condenser 20, the first valve 21, and the second valve 22.

[0048] This mode is set to ensure that when an unexpected power outage occurs in the power system supplying power to the system, the unit can still maintain normal operation, thereby allowing any planned actions of the system equipment without causing any service interruption of the equipment in the computer room. The cold storage tank of the cold storage condenser 20 is connected to an external cold storage tank through a cold storage water pipeline 29. Inside the inner circulation chamber, the inner circulation fan 1 sucks the indoor return air from the indoor return air inlet 3 into the inner circulation module of the unit, and it is filtered and purified through the inner circulation filter 2. The purified indoor return air is cooled by the heat pipe evaporator 5 and then sent into the computer room through the indoor air supply outlet 4. In the outer circulation chamber, under the suction of the outer circulation fan 17, the outdoor fresh air enters from the two fresh air inlets 19 on both sides of the outer circulation chamber, passes through the cold storage condenser 20 and takes away its heat, cooling the circulating refrigerant flowing through the cold storage condenser 20. The cooled circulating medium is transported by gravity to the heat pipe evaporator 5 to cool the indoor return air. After heat exchange, the outdoor fresh air is completely separated from water and steam by the water baffle 18 and then discharged to the outside through the outdoor air outlet 26.

[0049] Since the ambient wet bulb temperature changes continuously, the switching relationships between the three modes of this unit include the following three situations, namely from the first mode to the second mode, from the second mode to the third mode, and from the third mode to the first mode; the fourth mode belongs to a special situation and can achieve switching from the first mode to the fourth mode, from the second mode to the fourth mode, and from the third mode to the fourth mode.

[0050] The present invention provides an idea and method for an adaptive evaporative cooling heat pipe coupled air conditioning unit. There are many methods and ways to specifically implement this technical solution. The above description is only a preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention. Each component not clearly defined in this embodiment can be implemented using existing technologies.

Claims

1. An adaptable evaporative cooling type heat pipe coupled air conditioning unit, characterized in that, It includes a unit box body (34), an internal circulation module, and an external circulation module; an internal space of the unit box body (34) is provided with an independent internal circulation chamber (35) and an external circulation chamber (36), the internal circulation module is located in the internal circulation chamber (35), and the external circulation module is located in the external circulation chamber (36); The internal circulation module includes an internal circulation fan (1) for sucking indoor air, a heat pipe evaporator (5), a mechanical refrigeration evaporator (6), a throttling component, and a compressor (8); The external circulation module successively includes an external circulation fan (17) for sucking outdoor fresh air, a cold storage condenser (20), a heat pipe condenser (16), a heat pipe water distributor (15), a heat pipe circulating spray water pump (14), a mechanical refrigeration condenser (13), a mechanical refrigeration circulating spray water pump (12), a mechanical refrigeration water distributor (11), and a circulating water sump (9) for receiving spray water from top to bottom; both the heat pipe condenser (16) and the mechanical refrigeration condenser (13) are evaporation cooling heat exchange cores; The heat pipe evaporator (5) is connected to the condenser main body of the heat pipe condenser (16) or the cold storage condenser (20) through a pipeline; the mechanical refrigeration evaporator (6), the throttling component, the compressor (8), and the mechanical refrigeration condenser (13) are connected through pipelines; The heat pipe circulating spray water pump (14) is used to transport the circulating water in the circulating water sump (9) to the heat pipe water distributor (15); The mechanical refrigeration circulating spray water pump (12) is used to transport the circulating water in the circulating water sump (9) to the mechanical refrigeration water distributor (11); An indoor air return opening (3) is opened at the top of the internal circulation chamber, and the internal circulation fan (1) is installed below the indoor air return opening (3); an indoor air supply opening (4) is opened at the lower part of the side surface of the internal circulation chamber opposite to the external circulation chamber; when the internal circulation fan (1) is turned on, air enters the internal circulation chamber from the indoor air return opening (3), and after passing through the mechanical refrigeration evaporator (6) and the heat pipe evaporator (5) in sequence, it is discharged from the indoor air supply opening (4); in the external circulation module, the spray water directions of the mechanical refrigeration water distributor (11) and the heat pipe water distributor (15) are the same as the flowing direction of the outdoor fresh air, so that the spray water forms a liquid film to evenly cover the surfaces of the mechanical refrigeration condenser (13) and the heat pipe condenser (16); An outdoor air outlet (26) is opened at the top of the external circulation chamber, and the external circulation fan (17) is installed below the outdoor air outlet (26); fresh air inlets (19) are opened at both sides of the lower part of the external circulation chamber; when the external circulation fan (17) is turned on, outdoor fresh air enters from the fresh air inlets (19), and after passing through the mechanical refrigeration water distributor (11), the mechanical refrigeration condenser (13), the heat pipe water distributor (15), the heat pipe condenser (16), the cold storage condenser (20), and the external circulation fan (17) in sequence, it is discharged from the outdoor air outlet (26).

2. The adaptable evaporative cooling heat pipe coupled air conditioning unit according to claim 1, characterized in that, It also includes a first valve (21), a second valve (22), a third valve (24) and a fourth valve (25). One end of the first valve (21) is connected to one end of the cold storage condenser (20) through a pipeline. One end of the second valve (22) is connected to the other end of the cold storage condenser (20) through a pipeline. One end of the third valve (24) is connected to the heat pipe condenser (16) through a pipeline. One end of the fourth valve (25) is connected to the other end of the heat pipe condenser (16) through a pipeline. The other end of the first valve (21) and the other end of the third valve (24) are connected in parallel to one end of the heat pipe evaporator (5). The other end of the second valve (22) and the other end of the fourth valve (25) are connected in parallel to the other end of the heat pipe evaporator (5). By controlling the opening and closing of the first valve (21), the second valve (22), the third valve (24) and the fourth valve (25), the switching between the cold storage condenser (20) and the heat pipe condenser (16) is realized.

3. The adaptable evaporative cooling heat pipe coupled air conditioner unit according to claim 2, wherein when the outdoor ambient dry-bulb temperature ≤ 6°C, the internal circulation fan (1), the heat pipe evaporator (5), the heat pipe condenser (16), the external circulation fan (17), the third valve (24) and the fourth valve (25) are all enabled, and the mechanical refrigeration evaporator (6), the compressor (8), the mechanical refrigeration condenser (13), the heat pipe circulation spray pump (14), the mechanical refrigeration circulation spray pump (12), the cold storage condenser (20), the first valve (21) and the second valve (22) are all closed, and the unit is in the pure heat pipe natural cooling mode; when the outdoor ambient wet-bulb temperature ≤ 13°C, the internal circulation fan (1), the heat pipe evaporator (5), the heat pipe condenser (16), the external circulation fan (17), the heat pipe circulation spray pump (14), the heat pipe water distributor (15), the third valve (24) and the fourth valve (25) are all enabled, and the mechanical refrigeration evaporator (6), the compressor (8), the mechanical refrigeration condenser (13), the mechanical refrigeration water distributor (11), the mechanical refrigeration circulation spray pump (12), the cold storage condenser (20), the first valve (21) and the second valve (22) are all closed, and the unit is in the evaporative cooling heat pipe mode; when 13°C < outdoor ambient wet-bulb temperature ≤ 35°C, the internal circulation fan (1), the heat pipe evaporator (5), the heat pipe condenser (16), the external circulation fan (17), the heat pipe circulation spray pump (14), the heat pipe water distributor (15), the mechanical refrigeration evaporator (6), the compressor (8), the mechanical refrigeration condenser (13), the mechanical refrigeration water distributor (11), the mechanical refrigeration circulation spray pump (12), the third valve (24) and the fourth valve (25) are all enabled, and the cold storage condenser (20), the first valve (21) and the second valve (22) are all closed, and the unit is in the combined refrigeration mode; When an accidental power outage occurs in the power system supplying power to the system, the mechanical refrigeration evaporator (6), compressor (8), mechanical refrigeration condenser (13), mechanical refrigeration water distributor (11), mechanical refrigeration circulating spray pump (12), heat pipe circulating spray pump (14), heat pipe water distributor (15), third valve (24) and fourth valve (25) are all closed, and the internal circulation fan (1), heat pipe evaporator (5), heat pipe condenser (16), external circulation fan (17), cold storage condenser (20), first valve (21) and second valve (22) are all enabled, and the unit is in the cold storage mode.

4. An adaptable evaporative cooling heat pipe coupled air conditioning unit according to claim 3, characterized in that, The heat pipe evaporator (5), mechanical refrigeration evaporator (6) and compressor (8) are all located at the lower part of the internal circulation chamber. The heat pipe evaporator (5) is opposite to the indoor air supply outlet (4), and the mechanical refrigeration evaporator (6) is located between the evaporator 5 and the compressor (8).

5. An adaptable evaporative cooling heat pipe coupled air conditioning unit according to claim 4, characterized in that, It also includes an internal circulation filter (2), an external circulation filter (10) and a water baffle (18) for steam-water separation. The internal circulation filter (2) is located at the air outlet of the internal circulation fan (1), the external circulation filter (10) is installed on one side of the fresh air inlet (19) facing the external circulation chamber, and the water baffle (18) is installed below the external circulation fan (17) and above the cold storage condenser (20).

6. The adaptable evaporative cooling heat pipe coupled air conditioning unit according to claim 5, characterized in that, The throttling component is an electronic expansion valve (7).

7. An adaptable evaporative cooling heat pipe coupled air conditioning unit according to claim 6, characterized in that, It also includes a control system for monitoring, controlling and switching the unit.

8. The adaptable evaporative cooling heat pipe coupled air conditioning unit according to claim 1, characterized in that It also includes a power conversion module (23), and the power conversion module (23) provides UPS backup power for the internal circulation fan (1), external circulation fan (17), mechanical refrigeration evaporator (6), electronic expansion valve (7), compressor (8) and cold storage condenser (20).

9. An adaptable evaporative cooling heat pipe coupled air conditioning unit according to claim 8, characterized in that, The cold storage condenser (20) is connected to an external cold storage tank through a cold storage water pipeline (29).

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